Merge branch 'master' into cv-wait-monotonic
diff --git a/.gitignore b/.gitignore
index 151bbbd..2b35c5f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -121,6 +121,7 @@
 tags
 
 # perf data
+memory_usage.csv
 perf.data
 perf.data.old
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 297301b..22a1ab7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -678,6 +678,7 @@
 endif()
 add_dependencies(buildtests_cxx channel_arguments_test)
 add_dependencies(buildtests_cxx channel_filter_test)
+add_dependencies(buildtests_cxx chttp2_settings_timeout_test)
 add_dependencies(buildtests_cxx cli_call_test)
 add_dependencies(buildtests_cxx client_channel_stress_test)
 if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
@@ -9863,6 +9864,44 @@
 endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
 
+add_executable(chttp2_settings_timeout_test
+  test/core/transport/chttp2/settings_timeout_test.cc
+  third_party/googletest/googletest/src/gtest-all.cc
+  third_party/googletest/googlemock/src/gmock-all.cc
+)
+
+
+target_include_directories(chttp2_settings_timeout_test
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+  PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+  PRIVATE ${BORINGSSL_ROOT_DIR}/include
+  PRIVATE ${PROTOBUF_ROOT_DIR}/src
+  PRIVATE ${BENCHMARK_ROOT_DIR}/include
+  PRIVATE ${ZLIB_ROOT_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+  PRIVATE third_party/googletest/googletest/include
+  PRIVATE third_party/googletest/googletest
+  PRIVATE third_party/googletest/googlemock/include
+  PRIVATE third_party/googletest/googlemock
+  PRIVATE ${_gRPC_PROTO_GENS_DIR}
+)
+
+target_link_libraries(chttp2_settings_timeout_test
+  ${_gRPC_PROTOBUF_LIBRARIES}
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  grpc_test_util
+  grpc
+  gpr_test_util
+  gpr
+  ${_gRPC_GFLAGS_LIBRARIES}
+)
+
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+
 add_executable(cli_call_test
   test/cpp/util/cli_call_test.cc
   third_party/googletest/googletest/src/gtest-all.cc
diff --git a/Makefile b/Makefile
index 0e52d5a..9dfd2a8 100644
--- a/Makefile
+++ b/Makefile
@@ -1114,6 +1114,7 @@
 bm_pollset: $(BINDIR)/$(CONFIG)/bm_pollset
 channel_arguments_test: $(BINDIR)/$(CONFIG)/channel_arguments_test
 channel_filter_test: $(BINDIR)/$(CONFIG)/channel_filter_test
+chttp2_settings_timeout_test: $(BINDIR)/$(CONFIG)/chttp2_settings_timeout_test
 cli_call_test: $(BINDIR)/$(CONFIG)/cli_call_test
 client_channel_stress_test: $(BINDIR)/$(CONFIG)/client_channel_stress_test
 client_crash_test: $(BINDIR)/$(CONFIG)/client_crash_test
@@ -1557,6 +1558,7 @@
   $(BINDIR)/$(CONFIG)/bm_pollset \
   $(BINDIR)/$(CONFIG)/channel_arguments_test \
   $(BINDIR)/$(CONFIG)/channel_filter_test \
+  $(BINDIR)/$(CONFIG)/chttp2_settings_timeout_test \
   $(BINDIR)/$(CONFIG)/cli_call_test \
   $(BINDIR)/$(CONFIG)/client_channel_stress_test \
   $(BINDIR)/$(CONFIG)/client_crash_test \
@@ -1684,6 +1686,7 @@
   $(BINDIR)/$(CONFIG)/bm_pollset \
   $(BINDIR)/$(CONFIG)/channel_arguments_test \
   $(BINDIR)/$(CONFIG)/channel_filter_test \
+  $(BINDIR)/$(CONFIG)/chttp2_settings_timeout_test \
   $(BINDIR)/$(CONFIG)/cli_call_test \
   $(BINDIR)/$(CONFIG)/client_channel_stress_test \
   $(BINDIR)/$(CONFIG)/client_crash_test \
@@ -2069,6 +2072,8 @@
 	$(Q) $(BINDIR)/$(CONFIG)/channel_arguments_test || ( echo test channel_arguments_test failed ; exit 1 )
 	$(E) "[RUN]     Testing channel_filter_test"
 	$(Q) $(BINDIR)/$(CONFIG)/channel_filter_test || ( echo test channel_filter_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_settings_timeout_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_settings_timeout_test || ( echo test chttp2_settings_timeout_test failed ; exit 1 )
 	$(E) "[RUN]     Testing cli_call_test"
 	$(Q) $(BINDIR)/$(CONFIG)/cli_call_test || ( echo test cli_call_test failed ; exit 1 )
 	$(E) "[RUN]     Testing client_channel_stress_test"
@@ -14369,6 +14374,49 @@
 endif
 
 
+CHTTP2_SETTINGS_TIMEOUT_TEST_SRC = \
+    test/core/transport/chttp2/settings_timeout_test.cc \
+
+CHTTP2_SETTINGS_TIMEOUT_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(CHTTP2_SETTINGS_TIMEOUT_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/chttp2_settings_timeout_test: openssl_dep_error
+
+else
+
+
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/chttp2_settings_timeout_test: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/chttp2_settings_timeout_test: $(PROTOBUF_DEP) $(CHTTP2_SETTINGS_TIMEOUT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(CHTTP2_SETTINGS_TIMEOUT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/chttp2_settings_timeout_test
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/transport/chttp2/settings_timeout_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_chttp2_settings_timeout_test: $(CHTTP2_SETTINGS_TIMEOUT_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(CHTTP2_SETTINGS_TIMEOUT_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 CLI_CALL_TEST_SRC = \
     test/cpp/util/cli_call_test.cc \
 
diff --git a/build.yaml b/build.yaml
index 854a695..6158b46 100644
--- a/build.yaml
+++ b/build.yaml
@@ -3824,6 +3824,18 @@
   - grpc
   - gpr
   uses_polling: false
+- name: chttp2_settings_timeout_test
+  gtest: true
+  build: test
+  language: c++
+  src:
+  - test/core/transport/chttp2/settings_timeout_test.cc
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
+  uses_polling: true
 - name: cli_call_test
   gtest: true
   build: test
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 39b8484..bc4b318 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -34,6 +34,10 @@
     :tag => "v#{version}",
   }
 
+  # gRPC podspecs depend on fix for https://github.com/CocoaPods/CocoaPods/issues/6024,
+  # which was released in Cocoapods v1.2.0.
+  s.cocoapods_version = '>= 1.2.0'
+
   s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
   s.requires_arc = false
diff --git a/include/grpc++/support/channel_arguments.h b/include/grpc++/support/channel_arguments.h
index 9dc505f..c9879d8 100644
--- a/include/grpc++/support/channel_arguments.h
+++ b/include/grpc++/support/channel_arguments.h
@@ -122,7 +122,7 @@
   /// Default pointer argument operations.
   struct PointerVtableMembers {
     static void* Copy(void* in) { return in; }
-    static void Destroy(grpc_exec_ctx* exec_ctx, void* in) {}
+    static void Destroy(void* in) {}
     static int Compare(void* a, void* b) {
       if (a < b) return -1;
       if (a > b) return 1;
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index ad668b4..fcbc8ac 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -85,7 +85,7 @@
 
 typedef struct grpc_arg_pointer_vtable {
   void* (*copy)(void* p);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, void* p);
+  void (*destroy)(void* p);
   int (*cmp)(void* p, void* q);
 } grpc_arg_pointer_vtable;
 
@@ -240,6 +240,9 @@
 /** The time between the first and second connection attempts, in ms */
 #define GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS \
   "grpc.initial_reconnect_backoff_ms"
+/** The timeout used on servers for finishing handshaking on an incoming
+    connection.  Defaults to 120 seconds. */
+#define GRPC_ARG_SERVER_HANDSHAKE_TIMEOUT_MS "grpc.server_handshake_timeout_ms"
 /** This *should* be used for testing only.
     The caller of the secure_channel_create functions may override the target
     name used for SSL host name checking using this channel argument which is of
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index 1906886..5a0ed85 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -173,6 +173,7 @@
 #endif /* _LP64 */
 #ifdef __GLIBC__
 #define GPR_POSIX_CRASH_HANDLER 1
+#define GPR_LINUX_PTHREAD_NAME 1
 #else /* musl libc */
 #define GPR_MUSL_LIBC_COMPAT 1
 #endif
@@ -195,6 +196,7 @@
 #else /* __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_7 */
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_TLS 1
+#define GPR_APPLE_PTHREAD_NAME 1
 #endif
 #else /* __MAC_OS_X_VERSION_MIN_REQUIRED */
 #define GPR_CPU_POSIX 1
diff --git a/include/grpc/impl/codegen/slice.h b/include/grpc/impl/codegen/slice.h
index 11997fc..ad026b6 100644
--- a/include/grpc/impl/codegen/slice.h
+++ b/include/grpc/impl/codegen/slice.h
@@ -43,7 +43,7 @@
 
 typedef struct grpc_slice_refcount_vtable {
   void (*ref)(void*);
-  void (*unref)(grpc_exec_ctx* exec_ctx, void*);
+  void (*unref)(void*);
   int (*eq)(grpc_slice a, grpc_slice b);
   uint32_t (*hash)(grpc_slice slice);
 } grpc_slice_refcount_vtable;
diff --git a/include/grpc/slice_buffer.h b/include/grpc/slice_buffer.h
index 6510c15..30833d0 100644
--- a/include/grpc/slice_buffer.h
+++ b/include/grpc/slice_buffer.h
@@ -67,8 +67,7 @@
                                                 size_t n,
                                                 grpc_slice_buffer* dst);
 /** move the first n bytes of src into dst (copying them) */
-GPRAPI void grpc_slice_buffer_move_first_into_buffer(grpc_exec_ctx* exec_ctx,
-                                                     grpc_slice_buffer* src,
+GPRAPI void grpc_slice_buffer_move_first_into_buffer(grpc_slice_buffer* src,
                                                      size_t n, void* dst);
 /** take the first slice in the slice buffer */
 GPRAPI grpc_slice grpc_slice_buffer_take_first(grpc_slice_buffer* src);
diff --git a/include/grpc/support/thd.h b/include/grpc/support/thd.h
index 225d9d6..e9444e8 100644
--- a/include/grpc/support/thd.h
+++ b/include/grpc/support/thd.h
@@ -42,9 +42,12 @@
 
 /** Create a new thread running (*thd_body)(arg) and place its thread identifier
    in *t, and return true.  If there are insufficient resources, return false.
+   thd_name is the name of the thread for identification purposes on platforms
+   that support thread naming.
    If options==NULL, default options are used.
    The thread is immediately runnable, and exits when (*thd_body)() returns.  */
-GPRAPI int gpr_thd_new(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg,
+GPRAPI int gpr_thd_new(gpr_thd_id* t, const char* thd_name,
+                       void (*thd_body)(void* arg), void* arg,
                        const gpr_thd_options* options);
 
 /** Return a gpr_thd_options struct with all fields set to defaults. */
diff --git a/include/grpc/support/tls.h b/include/grpc/support/tls.h
index 8519a83..4c9e79b 100644
--- a/include/grpc/support/tls.h
+++ b/include/grpc/support/tls.h
@@ -32,6 +32,12 @@
      GPR_TLS_DECL(foo);
    Thread locals always have static scope.
 
+   Declaring a thread local class variable 'foo':
+     GPR_TLS_CLASS_DECL(foo);
+
+   Defining the thread local class variable:
+     GPR_TLS_CLASS_DEF(foo);
+
    Initializing a thread local (must be done at library initialization
    time):
      gpr_tls_init(&foo);
diff --git a/include/grpc/support/tls_gcc.h b/include/grpc/support/tls_gcc.h
index 1b91d22..b44f0f1 100644
--- a/include/grpc/support/tls_gcc.h
+++ b/include/grpc/support/tls_gcc.h
@@ -33,6 +33,11 @@
 #define GPR_TLS_DECL(name) \
   static __thread struct gpr_gcc_thread_local name = {0}
 
+#define GPR_TLS_CLASS_DECL(name) \
+  static __thread struct gpr_gcc_thread_local name
+
+#define GPR_TLS_CLASS_DEF(name) __thread struct gpr_gcc_thread_local name = {0}
+
 #define gpr_tls_init(tls) \
   do {                    \
   } while (0)
diff --git a/include/grpc/support/tls_msvc.h b/include/grpc/support/tls_msvc.h
index e5f2205..68a411f 100644
--- a/include/grpc/support/tls_msvc.h
+++ b/include/grpc/support/tls_msvc.h
@@ -26,9 +26,18 @@
   intptr_t value;
 };
 
+/** Use GPR_TLS_DECL to declare tls static variables outside a class */
 #define GPR_TLS_DECL(name) \
   static __declspec(thread) struct gpr_msvc_thread_local name = {0}
 
+/** Use GPR_TLS_CLASS_DECL to declare tls static variable members of a class.
+ *  GPR_TLS_CLASS_DEF needs to be called to define this member. */
+#define GPR_TLS_CLASS_DECL(name) \
+  static __declspec(thread) struct gpr_msvc_thread_local name
+
+#define GPR_TLS_CLASS_DEF(name) \
+  __declspec(thread) struct gpr_msvc_thread_local name = {0}
+
 #define gpr_tls_init(tls) \
   do {                    \
   } while (0)
diff --git a/include/grpc/support/tls_pthread.h b/include/grpc/support/tls_pthread.h
index fb0edd8..249c8b1 100644
--- a/include/grpc/support/tls_pthread.h
+++ b/include/grpc/support/tls_pthread.h
@@ -29,8 +29,17 @@
   pthread_key_t key;
 };
 
+/** Use GPR_TLS_DECL to declare tls static variables outside a class */
 #define GPR_TLS_DECL(name) static struct gpr_pthread_thread_local name = {0}
 
+/** Use GPR_TLS_CLASS_DECL to declare tls static variable members of a class.
+ *  GPR_TLS_CLASS_DEF needs to be called to define this member. */
+#define GPR_TLS_CLASS_DECL(name) static struct gpr_pthread_thread_local name
+
+/** Use GPR_TLS_CLASS_DEF to declare tls static variable members of a class.
+ *  GPR_TLS_CLASS_DEF needs to be called to define this member. */
+#define GPR_TLS_CLASS_DEF(name) struct gpr_pthread_thread_local name = {0}
+
 #define gpr_tls_init(tls) GPR_ASSERT(0 == pthread_key_create(&(tls)->key, NULL))
 #define gpr_tls_destroy(tls) pthread_key_delete((tls)->key)
 #define gpr_tls_get(tls) ((intptr_t)pthread_getspecific((tls)->key))
diff --git a/src/core/ext/filters/client_channel/backup_poller.cc b/src/core/ext/filters/client_channel/backup_poller.cc
index ed437d2..bfc549e 100644
--- a/src/core/ext/filters/client_channel/backup_poller.cc
+++ b/src/core/ext/filters/client_channel/backup_poller.cc
@@ -69,61 +69,62 @@
   gpr_free(env);
 }
 
-static void backup_poller_shutdown_unref(grpc_exec_ctx* exec_ctx,
-                                         backup_poller* p) {
+static void backup_poller_shutdown_unref(backup_poller* p) {
   if (gpr_unref(&p->shutdown_refs)) {
-    grpc_pollset_destroy(exec_ctx, p->pollset);
+    grpc_pollset_destroy(p->pollset);
     gpr_free(p->pollset);
     gpr_free(p);
   }
 }
 
-static void done_poller(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-  backup_poller_shutdown_unref(exec_ctx, (backup_poller*)arg);
+static void done_poller(void* arg, grpc_error* error) {
+  backup_poller_shutdown_unref((backup_poller*)arg);
 }
 
-static void g_poller_unref(grpc_exec_ctx* exec_ctx) {
+static void g_poller_unref() {
+  gpr_mu_lock(&g_poller_mu);
   if (gpr_unref(&g_poller->refs)) {
-    gpr_mu_lock(&g_poller_mu);
     backup_poller* p = g_poller;
     g_poller = nullptr;
     gpr_mu_unlock(&g_poller_mu);
     gpr_mu_lock(p->pollset_mu);
     p->shutting_down = true;
-    grpc_pollset_shutdown(exec_ctx, p->pollset,
-                          GRPC_CLOSURE_INIT(&p->shutdown_closure, done_poller,
-                                            p, grpc_schedule_on_exec_ctx));
+    grpc_pollset_shutdown(
+        p->pollset, GRPC_CLOSURE_INIT(&p->shutdown_closure, done_poller, p,
+                                      grpc_schedule_on_exec_ctx));
     gpr_mu_unlock(p->pollset_mu);
-    grpc_timer_cancel(exec_ctx, &p->polling_timer);
+    grpc_timer_cancel(&p->polling_timer);
+  } else {
+    gpr_mu_unlock(&g_poller_mu);
   }
 }
 
-static void run_poller(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void run_poller(void* arg, grpc_error* error) {
   backup_poller* p = (backup_poller*)arg;
   if (error != GRPC_ERROR_NONE) {
     if (error != GRPC_ERROR_CANCELLED) {
       GRPC_LOG_IF_ERROR("run_poller", GRPC_ERROR_REF(error));
     }
-    backup_poller_shutdown_unref(exec_ctx, p);
+    backup_poller_shutdown_unref(p);
     return;
   }
   gpr_mu_lock(p->pollset_mu);
   if (p->shutting_down) {
     gpr_mu_unlock(p->pollset_mu);
-    backup_poller_shutdown_unref(exec_ctx, p);
+    backup_poller_shutdown_unref(p);
     return;
   }
-  grpc_error* err = grpc_pollset_work(exec_ctx, p->pollset, nullptr,
-                                      grpc_exec_ctx_now(exec_ctx));
+  grpc_error* err =
+      grpc_pollset_work(p->pollset, nullptr, grpc_core::ExecCtx::Get()->Now());
   gpr_mu_unlock(p->pollset_mu);
   GRPC_LOG_IF_ERROR("Run client channel backup poller", err);
-  grpc_timer_init(exec_ctx, &p->polling_timer,
-                  grpc_exec_ctx_now(exec_ctx) + g_poll_interval_ms,
+  grpc_timer_init(&p->polling_timer,
+                  grpc_core::ExecCtx::Get()->Now() + g_poll_interval_ms,
                   &p->run_poller_closure);
 }
 
 void grpc_client_channel_start_backup_polling(
-    grpc_exec_ctx* exec_ctx, grpc_pollset_set* interested_parties) {
+    grpc_pollset_set* interested_parties) {
   gpr_once_init(&g_once, init_globals);
   if (g_poll_interval_ms == 0) {
     return;
@@ -139,8 +140,8 @@
     gpr_ref_init(&g_poller->shutdown_refs, 2);
     GRPC_CLOSURE_INIT(&g_poller->run_poller_closure, run_poller, g_poller,
                       grpc_schedule_on_exec_ctx);
-    grpc_timer_init(exec_ctx, &g_poller->polling_timer,
-                    grpc_exec_ctx_now(exec_ctx) + g_poll_interval_ms,
+    grpc_timer_init(&g_poller->polling_timer,
+                    grpc_core::ExecCtx::Get()->Now() + g_poll_interval_ms,
                     &g_poller->run_poller_closure);
   }
 
@@ -152,14 +153,14 @@
   grpc_pollset* pollset = g_poller->pollset;
   gpr_mu_unlock(&g_poller_mu);
 
-  grpc_pollset_set_add_pollset(exec_ctx, interested_parties, pollset);
+  grpc_pollset_set_add_pollset(interested_parties, pollset);
 }
 
 void grpc_client_channel_stop_backup_polling(
-    grpc_exec_ctx* exec_ctx, grpc_pollset_set* interested_parties) {
+    grpc_pollset_set* interested_parties) {
   if (g_poll_interval_ms == 0) {
     return;
   }
-  grpc_pollset_set_del_pollset(exec_ctx, interested_parties, g_poller->pollset);
-  g_poller_unref(exec_ctx);
+  grpc_pollset_set_del_pollset(interested_parties, g_poller->pollset);
+  g_poller_unref();
 }
diff --git a/src/core/ext/filters/client_channel/backup_poller.h b/src/core/ext/filters/client_channel/backup_poller.h
index e993d50..551e033 100644
--- a/src/core/ext/filters/client_channel/backup_poller.h
+++ b/src/core/ext/filters/client_channel/backup_poller.h
@@ -25,10 +25,10 @@
 
 /* Start polling \a interested_parties periodically in the timer thread  */
 void grpc_client_channel_start_backup_polling(
-    grpc_exec_ctx* exec_ctx, grpc_pollset_set* interested_parties);
+    grpc_pollset_set* interested_parties);
 
 /* Stop polling \a interested_parties */
 void grpc_client_channel_stop_backup_polling(
-    grpc_exec_ctx* exec_ctx, grpc_pollset_set* interested_parties);
+    grpc_pollset_set* interested_parties);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_BACKUP_POLLER_H */
diff --git a/src/core/ext/filters/client_channel/channel_connectivity.cc b/src/core/ext/filters/client_channel/channel_connectivity.cc
index 7eaf5d9..20693ba 100644
--- a/src/core/ext/filters/client_channel/channel_connectivity.cc
+++ b/src/core/ext/filters/client_channel/channel_connectivity.cc
@@ -33,22 +33,22 @@
   /* forward through to the underlying client channel */
   grpc_channel_element* client_channel_elem =
       grpc_channel_stack_last_element(grpc_channel_get_channel_stack(channel));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_connectivity_state state;
   GRPC_API_TRACE(
       "grpc_channel_check_connectivity_state(channel=%p, try_to_connect=%d)", 2,
       (channel, try_to_connect));
   if (client_channel_elem->filter == &grpc_client_channel_filter) {
-    state = grpc_client_channel_check_connectivity_state(
-        &exec_ctx, client_channel_elem, try_to_connect);
-    grpc_exec_ctx_finish(&exec_ctx);
+    state = grpc_client_channel_check_connectivity_state(client_channel_elem,
+                                                         try_to_connect);
+
     return state;
   }
   gpr_log(GPR_ERROR,
           "grpc_channel_check_connectivity_state called on something that is "
           "not a client channel, but '%s'",
           client_channel_elem->filter->name);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return GRPC_CHANNEL_SHUTDOWN;
 }
 
@@ -73,12 +73,11 @@
   void* tag;
 } state_watcher;
 
-static void delete_state_watcher(grpc_exec_ctx* exec_ctx, state_watcher* w) {
+static void delete_state_watcher(state_watcher* w) {
   grpc_channel_element* client_channel_elem = grpc_channel_stack_last_element(
       grpc_channel_get_channel_stack(w->channel));
   if (client_channel_elem->filter == &grpc_client_channel_filter) {
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, w->channel,
-                                "watch_channel_connectivity");
+    GRPC_CHANNEL_INTERNAL_UNREF(w->channel, "watch_channel_connectivity");
   } else {
     abort();
   }
@@ -86,8 +85,7 @@
   gpr_free(w);
 }
 
-static void finished_completion(grpc_exec_ctx* exec_ctx, void* pw,
-                                grpc_cq_completion* ignored) {
+static void finished_completion(void* pw, grpc_cq_completion* ignored) {
   bool should_delete = false;
   state_watcher* w = (state_watcher*)pw;
   gpr_mu_lock(&w->mu);
@@ -102,19 +100,19 @@
   gpr_mu_unlock(&w->mu);
 
   if (should_delete) {
-    delete_state_watcher(exec_ctx, w);
+    delete_state_watcher(w);
   }
 }
 
-static void partly_done(grpc_exec_ctx* exec_ctx, state_watcher* w,
-                        bool due_to_completion, grpc_error* error) {
+static void partly_done(state_watcher* w, bool due_to_completion,
+                        grpc_error* error) {
   if (due_to_completion) {
-    grpc_timer_cancel(exec_ctx, &w->alarm);
+    grpc_timer_cancel(&w->alarm);
   } else {
     grpc_channel_element* client_channel_elem = grpc_channel_stack_last_element(
         grpc_channel_get_channel_stack(w->channel));
     grpc_client_channel_watch_connectivity_state(
-        exec_ctx, client_channel_elem,
+        client_channel_elem,
         grpc_polling_entity_create_from_pollset(grpc_cq_pollset(w->cq)),
         nullptr, &w->on_complete, nullptr);
   }
@@ -149,7 +147,7 @@
         w->error = error;
       }
       w->phase = CALLING_BACK_AND_FINISHED;
-      grpc_cq_end_op(exec_ctx, w->cq, w->tag, w->error, finished_completion, w,
+      grpc_cq_end_op(w->cq, w->tag, w->error, finished_completion, w,
                      &w->completion_storage);
       break;
     case CALLING_BACK_AND_FINISHED:
@@ -161,14 +159,12 @@
   GRPC_ERROR_UNREF(error);
 }
 
-static void watch_complete(grpc_exec_ctx* exec_ctx, void* pw,
-                           grpc_error* error) {
-  partly_done(exec_ctx, (state_watcher*)pw, true, GRPC_ERROR_REF(error));
+static void watch_complete(void* pw, grpc_error* error) {
+  partly_done((state_watcher*)pw, true, GRPC_ERROR_REF(error));
 }
 
-static void timeout_complete(grpc_exec_ctx* exec_ctx, void* pw,
-                             grpc_error* error) {
-  partly_done(exec_ctx, (state_watcher*)pw, false, GRPC_ERROR_REF(error));
+static void timeout_complete(void* pw, grpc_error* error) {
+  partly_done((state_watcher*)pw, false, GRPC_ERROR_REF(error));
 }
 
 int grpc_channel_num_external_connectivity_watchers(grpc_channel* channel) {
@@ -183,12 +179,10 @@
   gpr_timespec deadline;
 } watcher_timer_init_arg;
 
-static void watcher_timer_init(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error_ignored) {
+static void watcher_timer_init(void* arg, grpc_error* error_ignored) {
   watcher_timer_init_arg* wa = (watcher_timer_init_arg*)arg;
 
-  grpc_timer_init(exec_ctx, &wa->w->alarm,
-                  grpc_timespec_to_millis_round_up(wa->deadline),
+  grpc_timer_init(&wa->w->alarm, grpc_timespec_to_millis_round_up(wa->deadline),
                   &wa->w->on_timeout);
   gpr_free(wa);
 }
@@ -204,7 +198,7 @@
     gpr_timespec deadline, grpc_completion_queue* cq, void* tag) {
   grpc_channel_element* client_channel_elem =
       grpc_channel_stack_last_element(grpc_channel_get_channel_stack(channel));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   state_watcher* w = (state_watcher*)gpr_malloc(sizeof(*w));
 
   GRPC_API_TRACE(
@@ -241,12 +235,10 @@
   if (client_channel_elem->filter == &grpc_client_channel_filter) {
     GRPC_CHANNEL_INTERNAL_REF(channel, "watch_channel_connectivity");
     grpc_client_channel_watch_connectivity_state(
-        &exec_ctx, client_channel_elem,
+        client_channel_elem,
         grpc_polling_entity_create_from_pollset(grpc_cq_pollset(cq)), &w->state,
         &w->on_complete, &w->watcher_timer_init);
   } else {
     abort();
   }
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
diff --git a/src/core/ext/filters/client_channel/client_channel.cc b/src/core/ext/filters/client_channel/client_channel.cc
index 58496dc..e99022a 100644
--- a/src/core/ext/filters/client_channel/client_channel.cc
+++ b/src/core/ext/filters/client_channel/client_channel.cc
@@ -91,8 +91,7 @@
 static void* method_parameters_ref_wrapper(void* value) {
   return method_parameters_ref((method_parameters*)value);
 }
-static void method_parameters_unref_wrapper(grpc_exec_ctx* exec_ctx,
-                                            void* value) {
+static void method_parameters_unref_wrapper(void* value) {
   method_parameters_unref((method_parameters*)value);
 }
 
@@ -210,6 +209,14 @@
   char* info_service_config_json;
 } channel_data;
 
+typedef struct {
+  channel_data* chand;
+  /** used as an identifier, don't dereference it because the LB policy may be
+   * non-existing when the callback is run */
+  grpc_lb_policy* lb_policy;
+  grpc_closure closure;
+} reresolution_request_args;
+
 /** We create one watcher for each new lb_policy that is returned from a
     resolver, to watch for state changes from the lb_policy. When a state
     change is seen, we update the channel, and create a new watcher. */
@@ -220,12 +227,11 @@
   grpc_lb_policy* lb_policy;
 } lb_policy_connectivity_watcher;
 
-static void watch_lb_policy_locked(grpc_exec_ctx* exec_ctx, channel_data* chand,
+static void watch_lb_policy_locked(channel_data* chand,
                                    grpc_lb_policy* lb_policy,
                                    grpc_connectivity_state current_state);
 
-static void set_channel_connectivity_state_locked(grpc_exec_ctx* exec_ctx,
-                                                  channel_data* chand,
+static void set_channel_connectivity_state_locked(channel_data* chand,
                                                   grpc_connectivity_state state,
                                                   grpc_error* error,
                                                   const char* reason) {
@@ -237,12 +243,12 @@
     if (state == GRPC_CHANNEL_TRANSIENT_FAILURE) {
       /* cancel picks with wait_for_ready=false */
       grpc_lb_policy_cancel_picks_locked(
-          exec_ctx, chand->lb_policy,
+          chand->lb_policy,
           /* mask= */ GRPC_INITIAL_METADATA_WAIT_FOR_READY,
           /* check= */ 0, GRPC_ERROR_REF(error));
     } else if (state == GRPC_CHANNEL_SHUTDOWN) {
       /* cancel all picks */
-      grpc_lb_policy_cancel_picks_locked(exec_ctx, chand->lb_policy,
+      grpc_lb_policy_cancel_picks_locked(chand->lb_policy,
                                          /* mask= */ 0, /* check= */ 0,
                                          GRPC_ERROR_REF(error));
     }
@@ -251,38 +257,28 @@
     gpr_log(GPR_DEBUG, "chand=%p: setting connectivity state to %s", chand,
             grpc_connectivity_state_name(state));
   }
-  grpc_connectivity_state_set(exec_ctx, &chand->state_tracker, state, error,
-                              reason);
+  grpc_connectivity_state_set(&chand->state_tracker, state, error, reason);
 }
 
-static void on_lb_policy_state_changed_locked(grpc_exec_ctx* exec_ctx,
-                                              void* arg, grpc_error* error) {
+static void on_lb_policy_state_changed_locked(void* arg, grpc_error* error) {
   lb_policy_connectivity_watcher* w = (lb_policy_connectivity_watcher*)arg;
-  grpc_connectivity_state publish_state = w->state;
   /* check if the notification is for the latest policy */
   if (w->lb_policy == w->chand->lb_policy) {
     if (grpc_client_channel_trace.enabled()) {
       gpr_log(GPR_DEBUG, "chand=%p: lb_policy=%p state changed to %s", w->chand,
               w->lb_policy, grpc_connectivity_state_name(w->state));
     }
-    if (publish_state == GRPC_CHANNEL_SHUTDOWN &&
-        w->chand->resolver != nullptr) {
-      publish_state = GRPC_CHANNEL_TRANSIENT_FAILURE;
-      grpc_resolver_channel_saw_error_locked(exec_ctx, w->chand->resolver);
-      GRPC_LB_POLICY_UNREF(exec_ctx, w->chand->lb_policy, "channel");
-      w->chand->lb_policy = nullptr;
-    }
-    set_channel_connectivity_state_locked(exec_ctx, w->chand, publish_state,
+    set_channel_connectivity_state_locked(w->chand, w->state,
                                           GRPC_ERROR_REF(error), "lb_changed");
     if (w->state != GRPC_CHANNEL_SHUTDOWN) {
-      watch_lb_policy_locked(exec_ctx, w->chand, w->lb_policy, w->state);
+      watch_lb_policy_locked(w->chand, w->lb_policy, w->state);
     }
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack, "watch_lb_policy");
+  GRPC_CHANNEL_STACK_UNREF(w->chand->owning_stack, "watch_lb_policy");
   gpr_free(w);
 }
 
-static void watch_lb_policy_locked(grpc_exec_ctx* exec_ctx, channel_data* chand,
+static void watch_lb_policy_locked(channel_data* chand,
                                    grpc_lb_policy* lb_policy,
                                    grpc_connectivity_state current_state) {
   lb_policy_connectivity_watcher* w =
@@ -293,19 +289,18 @@
                     grpc_combiner_scheduler(chand->combiner));
   w->state = current_state;
   w->lb_policy = lb_policy;
-  grpc_lb_policy_notify_on_state_change_locked(exec_ctx, lb_policy, &w->state,
+  grpc_lb_policy_notify_on_state_change_locked(lb_policy, &w->state,
                                                &w->on_changed);
 }
 
-static void start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                   channel_data* chand) {
+static void start_resolving_locked(channel_data* chand) {
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p: starting name resolution", chand);
   }
   GPR_ASSERT(!chand->started_resolving);
   chand->started_resolving = true;
   GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver");
-  grpc_resolver_next_locked(exec_ctx, chand->resolver, &chand->resolver_result,
+  grpc_resolver_next_locked(chand->resolver, &chand->resolver_result,
                             &chand->on_resolver_result_changed);
 }
 
@@ -369,8 +364,26 @@
   }
 }
 
-static void on_resolver_result_changed_locked(grpc_exec_ctx* exec_ctx,
-                                              void* arg, grpc_error* error) {
+static void request_reresolution_locked(void* arg, grpc_error* error) {
+  reresolution_request_args* args = (reresolution_request_args*)arg;
+  channel_data* chand = args->chand;
+  // If this invocation is for a stale LB policy, treat it as an LB shutdown
+  // signal.
+  if (args->lb_policy != chand->lb_policy || error != GRPC_ERROR_NONE ||
+      chand->resolver == nullptr) {
+    GRPC_CHANNEL_STACK_UNREF(chand->owning_stack, "re-resolution");
+    gpr_free(args);
+    return;
+  }
+  if (grpc_client_channel_trace.enabled()) {
+    gpr_log(GPR_DEBUG, "chand=%p: started name re-resolving", chand);
+  }
+  grpc_resolver_channel_saw_error_locked(chand->resolver);
+  // Give back the closure to the LB policy.
+  grpc_lb_policy_set_reresolve_closure_locked(chand->lb_policy, &args->closure);
+}
+
+static void on_resolver_result_changed_locked(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p: got resolver result: error=%s", chand,
@@ -385,101 +398,112 @@
   grpc_server_retry_throttle_data* retry_throttle_data = nullptr;
   grpc_slice_hash_table* method_params_table = nullptr;
   if (chand->resolver_result != nullptr) {
-    // Find LB policy name.
-    const char* lb_policy_name = nullptr;
-    const grpc_arg* channel_arg =
-        grpc_channel_args_find(chand->resolver_result, GRPC_ARG_LB_POLICY_NAME);
-    if (channel_arg != nullptr) {
-      GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
-      lb_policy_name = channel_arg->value.string;
-    }
-    // Special case: If at least one balancer address is present, we use
-    // the grpclb policy, regardless of what the resolver actually specified.
-    channel_arg =
-        grpc_channel_args_find(chand->resolver_result, GRPC_ARG_LB_ADDRESSES);
-    if (channel_arg != nullptr && channel_arg->type == GRPC_ARG_POINTER) {
-      grpc_lb_addresses* addresses =
-          (grpc_lb_addresses*)channel_arg->value.pointer.p;
-      bool found_balancer_address = false;
-      for (size_t i = 0; i < addresses->num_addresses; ++i) {
-        if (addresses->addresses[i].is_balancer) {
-          found_balancer_address = true;
-          break;
-        }
-      }
-      if (found_balancer_address) {
-        if (lb_policy_name != nullptr &&
-            strcmp(lb_policy_name, "grpclb") != 0) {
-          gpr_log(GPR_INFO,
-                  "resolver requested LB policy %s but provided at least one "
-                  "balancer address -- forcing use of grpclb LB policy",
-                  lb_policy_name);
-        }
-        lb_policy_name = "grpclb";
-      }
-    }
-    // Use pick_first if nothing was specified and we didn't select grpclb
-    // above.
-    if (lb_policy_name == nullptr) lb_policy_name = "pick_first";
-    grpc_lb_policy_args lb_policy_args;
-    lb_policy_args.args = chand->resolver_result;
-    lb_policy_args.client_channel_factory = chand->client_channel_factory;
-    lb_policy_args.combiner = chand->combiner;
-    // Check to see if we're already using the right LB policy.
-    // Note: It's safe to use chand->info_lb_policy_name here without
-    // taking a lock on chand->info_mu, because this function is the
-    // only thing that modifies its value, and it can only be invoked
-    // once at any given time.
-    lb_policy_name_changed =
-        chand->info_lb_policy_name == nullptr ||
-        gpr_stricmp(chand->info_lb_policy_name, lb_policy_name) != 0;
-    if (chand->lb_policy != nullptr && !lb_policy_name_changed) {
-      // Continue using the same LB policy.  Update with new addresses.
-      lb_policy_updated = true;
-      grpc_lb_policy_update_locked(exec_ctx, chand->lb_policy, &lb_policy_args);
-    } else {
-      // Instantiate new LB policy.
-      new_lb_policy =
-          grpc_lb_policy_create(exec_ctx, lb_policy_name, &lb_policy_args);
-      if (new_lb_policy == nullptr) {
-        gpr_log(GPR_ERROR, "could not create LB policy \"%s\"", lb_policy_name);
-      }
-    }
-    // Find service config.
-    channel_arg =
-        grpc_channel_args_find(chand->resolver_result, GRPC_ARG_SERVICE_CONFIG);
-    if (channel_arg != nullptr) {
-      GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
-      service_config_json = gpr_strdup(channel_arg->value.string);
-      grpc_service_config* service_config =
-          grpc_service_config_create(service_config_json);
-      if (service_config != nullptr) {
-        channel_arg =
-            grpc_channel_args_find(chand->resolver_result, GRPC_ARG_SERVER_URI);
-        GPR_ASSERT(channel_arg != nullptr);
+    if (chand->resolver != nullptr) {
+      // Find LB policy name.
+      const char* lb_policy_name = nullptr;
+      const grpc_arg* channel_arg = grpc_channel_args_find(
+          chand->resolver_result, GRPC_ARG_LB_POLICY_NAME);
+      if (channel_arg != nullptr) {
         GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
-        grpc_uri* uri =
-            grpc_uri_parse(exec_ctx, channel_arg->value.string, true);
-        GPR_ASSERT(uri->path[0] != '\0');
-        service_config_parsing_state parsing_state;
-        memset(&parsing_state, 0, sizeof(parsing_state));
-        parsing_state.server_name =
-            uri->path[0] == '/' ? uri->path + 1 : uri->path;
-        grpc_service_config_parse_global_params(
-            service_config, parse_retry_throttle_params, &parsing_state);
-        grpc_uri_destroy(uri);
-        retry_throttle_data = parsing_state.retry_throttle_data;
-        method_params_table = grpc_service_config_create_method_config_table(
-            exec_ctx, service_config, method_parameters_create_from_json,
-            method_parameters_ref_wrapper, method_parameters_unref_wrapper);
-        grpc_service_config_destroy(service_config);
+        lb_policy_name = channel_arg->value.string;
       }
+      // Special case: If at least one balancer address is present, we use
+      // the grpclb policy, regardless of what the resolver actually specified.
+      channel_arg =
+          grpc_channel_args_find(chand->resolver_result, GRPC_ARG_LB_ADDRESSES);
+      if (channel_arg != nullptr && channel_arg->type == GRPC_ARG_POINTER) {
+        grpc_lb_addresses* addresses =
+            (grpc_lb_addresses*)channel_arg->value.pointer.p;
+        bool found_balancer_address = false;
+        for (size_t i = 0; i < addresses->num_addresses; ++i) {
+          if (addresses->addresses[i].is_balancer) {
+            found_balancer_address = true;
+            break;
+          }
+        }
+        if (found_balancer_address) {
+          if (lb_policy_name != nullptr &&
+              strcmp(lb_policy_name, "grpclb") != 0) {
+            gpr_log(GPR_INFO,
+                    "resolver requested LB policy %s but provided at least one "
+                    "balancer address -- forcing use of grpclb LB policy",
+                    lb_policy_name);
+          }
+          lb_policy_name = "grpclb";
+        }
+      }
+      // Use pick_first if nothing was specified and we didn't select grpclb
+      // above.
+      if (lb_policy_name == nullptr) lb_policy_name = "pick_first";
+      grpc_lb_policy_args lb_policy_args;
+      lb_policy_args.args = chand->resolver_result;
+      lb_policy_args.client_channel_factory = chand->client_channel_factory;
+      lb_policy_args.combiner = chand->combiner;
+      // Check to see if we're already using the right LB policy.
+      // Note: It's safe to use chand->info_lb_policy_name here without
+      // taking a lock on chand->info_mu, because this function is the
+      // only thing that modifies its value, and it can only be invoked
+      // once at any given time.
+      lb_policy_name_changed =
+          chand->info_lb_policy_name == nullptr ||
+          gpr_stricmp(chand->info_lb_policy_name, lb_policy_name) != 0;
+      if (chand->lb_policy != nullptr && !lb_policy_name_changed) {
+        // Continue using the same LB policy.  Update with new addresses.
+        lb_policy_updated = true;
+        grpc_lb_policy_update_locked(chand->lb_policy, &lb_policy_args);
+      } else {
+        // Instantiate new LB policy.
+        new_lb_policy = grpc_lb_policy_create(lb_policy_name, &lb_policy_args);
+        if (new_lb_policy == nullptr) {
+          gpr_log(GPR_ERROR, "could not create LB policy \"%s\"",
+                  lb_policy_name);
+        } else {
+          reresolution_request_args* args =
+              (reresolution_request_args*)gpr_zalloc(sizeof(*args));
+          args->chand = chand;
+          args->lb_policy = new_lb_policy;
+          GRPC_CLOSURE_INIT(&args->closure, request_reresolution_locked, args,
+                            grpc_combiner_scheduler(chand->combiner));
+          GRPC_CHANNEL_STACK_REF(chand->owning_stack, "re-resolution");
+          grpc_lb_policy_set_reresolve_closure_locked(new_lb_policy,
+                                                      &args->closure);
+        }
+      }
+      // Find service config.
+      channel_arg = grpc_channel_args_find(chand->resolver_result,
+                                           GRPC_ARG_SERVICE_CONFIG);
+      if (channel_arg != nullptr) {
+        GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
+        service_config_json = gpr_strdup(channel_arg->value.string);
+        grpc_service_config* service_config =
+            grpc_service_config_create(service_config_json);
+        if (service_config != nullptr) {
+          channel_arg = grpc_channel_args_find(chand->resolver_result,
+                                               GRPC_ARG_SERVER_URI);
+          GPR_ASSERT(channel_arg != nullptr);
+          GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING);
+          grpc_uri* uri = grpc_uri_parse(channel_arg->value.string, true);
+          GPR_ASSERT(uri->path[0] != '\0');
+          service_config_parsing_state parsing_state;
+          memset(&parsing_state, 0, sizeof(parsing_state));
+          parsing_state.server_name =
+              uri->path[0] == '/' ? uri->path + 1 : uri->path;
+          grpc_service_config_parse_global_params(
+              service_config, parse_retry_throttle_params, &parsing_state);
+          grpc_uri_destroy(uri);
+          retry_throttle_data = parsing_state.retry_throttle_data;
+          method_params_table = grpc_service_config_create_method_config_table(
+              service_config, method_parameters_create_from_json,
+              method_parameters_ref_wrapper, method_parameters_unref_wrapper);
+          grpc_service_config_destroy(service_config);
+        }
+      }
+      // Before we clean up, save a copy of lb_policy_name, since it might
+      // be pointing to data inside chand->resolver_result.
+      // The copy will be saved in chand->lb_policy_name below.
+      lb_policy_name_dup = gpr_strdup(lb_policy_name);
     }
-    // Before we clean up, save a copy of lb_policy_name, since it might
-    // be pointing to data inside chand->resolver_result.
-    // The copy will be saved in chand->lb_policy_name below.
-    lb_policy_name_dup = gpr_strdup(lb_policy_name);
-    grpc_channel_args_destroy(exec_ctx, chand->resolver_result);
+    grpc_channel_args_destroy(chand->resolver_result);
     chand->resolver_result = nullptr;
   }
   if (grpc_client_channel_trace.enabled()) {
@@ -511,15 +535,15 @@
   chand->retry_throttle_data = retry_throttle_data;
   // Swap out the method params table.
   if (chand->method_params_table != nullptr) {
-    grpc_slice_hash_table_unref(exec_ctx, chand->method_params_table);
+    grpc_slice_hash_table_unref(chand->method_params_table);
   }
   chand->method_params_table = method_params_table;
   // If we have a new LB policy or are shutting down (in which case
-  // new_lb_policy will be NULL), swap out the LB policy, unreffing the
-  // old one and removing its fds from chand->interested_parties.
-  // Note that we do NOT do this if either (a) we updated the existing
-  // LB policy above or (b) we failed to create the new LB policy (in
-  // which case we want to continue using the most recent one we had).
+  // new_lb_policy will be NULL), swap out the LB policy, unreffing the old one
+  // and removing its fds from chand->interested_parties. Note that we do NOT do
+  // this if either (a) we updated the existing LB policy above or (b) we failed
+  // to create the new LB policy (in which case we want to continue using the
+  // most recent one we had).
   if (new_lb_policy != nullptr || error != GRPC_ERROR_NONE ||
       chand->resolver == nullptr) {
     if (chand->lb_policy != nullptr) {
@@ -527,10 +551,9 @@
         gpr_log(GPR_DEBUG, "chand=%p: unreffing lb_policy=%p", chand,
                 chand->lb_policy);
       }
-      grpc_pollset_set_del_pollset_set(exec_ctx,
-                                       chand->lb_policy->interested_parties,
+      grpc_pollset_set_del_pollset_set(chand->lb_policy->interested_parties,
                                        chand->interested_parties);
-      GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
+      GRPC_LB_POLICY_UNREF(chand->lb_policy, "channel");
     }
     chand->lb_policy = new_lb_policy;
   }
@@ -544,21 +567,20 @@
       if (grpc_client_channel_trace.enabled()) {
         gpr_log(GPR_DEBUG, "chand=%p: shutting down resolver", chand);
       }
-      grpc_resolver_shutdown_locked(exec_ctx, chand->resolver);
-      GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel");
+      grpc_resolver_shutdown_locked(chand->resolver);
+      GRPC_RESOLVER_UNREF(chand->resolver, "channel");
       chand->resolver = nullptr;
     }
     set_channel_connectivity_state_locked(
-        exec_ctx, chand, GRPC_CHANNEL_SHUTDOWN,
+        chand, GRPC_CHANNEL_SHUTDOWN,
         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
             "Got resolver result after disconnection", &error, 1),
         "resolver_gone");
-    GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "resolver");
+    GRPC_CHANNEL_STACK_UNREF(chand->owning_stack, "resolver");
     grpc_closure_list_fail_all(&chand->waiting_for_resolver_result_closures,
                                GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                                    "Channel disconnected", &error, 1));
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx,
-                            &chand->waiting_for_resolver_result_closures);
+    GRPC_CLOSURE_LIST_SCHED(&chand->waiting_for_resolver_result_closures);
   } else {  // Not shutting down.
     grpc_connectivity_state state = GRPC_CHANNEL_TRANSIENT_FAILURE;
     grpc_error* state_error =
@@ -568,33 +590,28 @@
         gpr_log(GPR_DEBUG, "chand=%p: initializing new LB policy", chand);
       }
       GRPC_ERROR_UNREF(state_error);
-      state = grpc_lb_policy_check_connectivity_locked(exec_ctx, new_lb_policy,
-                                                       &state_error);
-      grpc_pollset_set_add_pollset_set(exec_ctx,
-                                       new_lb_policy->interested_parties,
+      state =
+          grpc_lb_policy_check_connectivity_locked(new_lb_policy, &state_error);
+      grpc_pollset_set_add_pollset_set(new_lb_policy->interested_parties,
                                        chand->interested_parties);
-      GRPC_CLOSURE_LIST_SCHED(exec_ctx,
-                              &chand->waiting_for_resolver_result_closures);
+      GRPC_CLOSURE_LIST_SCHED(&chand->waiting_for_resolver_result_closures);
       if (chand->exit_idle_when_lb_policy_arrives) {
-        grpc_lb_policy_exit_idle_locked(exec_ctx, new_lb_policy);
+        grpc_lb_policy_exit_idle_locked(new_lb_policy);
         chand->exit_idle_when_lb_policy_arrives = false;
       }
-      watch_lb_policy_locked(exec_ctx, chand, new_lb_policy, state);
+      watch_lb_policy_locked(chand, new_lb_policy, state);
     }
     if (!lb_policy_updated) {
-      set_channel_connectivity_state_locked(exec_ctx, chand, state,
-                                            GRPC_ERROR_REF(state_error),
-                                            "new_lb+resolver");
+      set_channel_connectivity_state_locked(
+          chand, state, GRPC_ERROR_REF(state_error), "new_lb+resolver");
     }
-    grpc_resolver_next_locked(exec_ctx, chand->resolver,
-                              &chand->resolver_result,
+    grpc_resolver_next_locked(chand->resolver, &chand->resolver_result,
                               &chand->on_resolver_result_changed);
     GRPC_ERROR_UNREF(state_error);
   }
 }
 
-static void start_transport_op_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error_ignored) {
+static void start_transport_op_locked(void* arg, grpc_error* error_ignored) {
   grpc_transport_op* op = (grpc_transport_op*)arg;
   grpc_channel_element* elem =
       (grpc_channel_element*)op->handler_private.extra_arg;
@@ -602,75 +619,74 @@
 
   if (op->on_connectivity_state_change != nullptr) {
     grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &chand->state_tracker, op->connectivity_state,
+        &chand->state_tracker, op->connectivity_state,
         op->on_connectivity_state_change);
     op->on_connectivity_state_change = nullptr;
     op->connectivity_state = nullptr;
   }
 
-  if (op->send_ping != nullptr) {
+  if (op->send_ping.on_initiate != nullptr || op->send_ping.on_ack != nullptr) {
     if (chand->lb_policy == nullptr) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx, op->send_ping,
+          op->send_ping.on_initiate,
+          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Ping with no load balancing"));
+      GRPC_CLOSURE_SCHED(
+          op->send_ping.on_ack,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Ping with no load balancing"));
     } else {
-      grpc_lb_policy_ping_one_locked(exec_ctx, chand->lb_policy, op->send_ping);
+      grpc_lb_policy_ping_one_locked(
+          chand->lb_policy, op->send_ping.on_initiate, op->send_ping.on_ack);
       op->bind_pollset = nullptr;
     }
-    op->send_ping = nullptr;
+    op->send_ping.on_initiate = nullptr;
+    op->send_ping.on_ack = nullptr;
   }
 
   if (op->disconnect_with_error != GRPC_ERROR_NONE) {
     if (chand->resolver != nullptr) {
       set_channel_connectivity_state_locked(
-          exec_ctx, chand, GRPC_CHANNEL_SHUTDOWN,
+          chand, GRPC_CHANNEL_SHUTDOWN,
           GRPC_ERROR_REF(op->disconnect_with_error), "disconnect");
-      grpc_resolver_shutdown_locked(exec_ctx, chand->resolver);
-      GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel");
+      grpc_resolver_shutdown_locked(chand->resolver);
+      GRPC_RESOLVER_UNREF(chand->resolver, "channel");
       chand->resolver = nullptr;
       if (!chand->started_resolving) {
         grpc_closure_list_fail_all(&chand->waiting_for_resolver_result_closures,
                                    GRPC_ERROR_REF(op->disconnect_with_error));
-        GRPC_CLOSURE_LIST_SCHED(exec_ctx,
-                                &chand->waiting_for_resolver_result_closures);
+        GRPC_CLOSURE_LIST_SCHED(&chand->waiting_for_resolver_result_closures);
       }
       if (chand->lb_policy != nullptr) {
-        grpc_pollset_set_del_pollset_set(exec_ctx,
-                                         chand->lb_policy->interested_parties,
+        grpc_pollset_set_del_pollset_set(chand->lb_policy->interested_parties,
                                          chand->interested_parties);
-        GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
+        GRPC_LB_POLICY_UNREF(chand->lb_policy, "channel");
         chand->lb_policy = nullptr;
       }
     }
     GRPC_ERROR_UNREF(op->disconnect_with_error);
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "start_transport_op");
+  GRPC_CHANNEL_STACK_UNREF(chand->owning_stack, "start_transport_op");
 
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
 }
 
-static void cc_start_transport_op(grpc_exec_ctx* exec_ctx,
-                                  grpc_channel_element* elem,
+static void cc_start_transport_op(grpc_channel_element* elem,
                                   grpc_transport_op* op) {
   channel_data* chand = (channel_data*)elem->channel_data;
 
   GPR_ASSERT(op->set_accept_stream == false);
   if (op->bind_pollset != nullptr) {
-    grpc_pollset_set_add_pollset(exec_ctx, chand->interested_parties,
-                                 op->bind_pollset);
+    grpc_pollset_set_add_pollset(chand->interested_parties, op->bind_pollset);
   }
 
   op->handler_private.extra_arg = elem;
   GRPC_CHANNEL_STACK_REF(chand->owning_stack, "start_transport_op");
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&op->handler_private.closure, start_transport_op_locked,
                         op, grpc_combiner_scheduler(chand->combiner)),
       GRPC_ERROR_NONE);
 }
 
-static void cc_get_channel_info(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_element* elem,
+static void cc_get_channel_info(grpc_channel_element* elem,
                                 const grpc_channel_info* info) {
   channel_data* chand = (channel_data*)elem->channel_data;
   gpr_mu_lock(&chand->info_mu);
@@ -689,8 +705,7 @@
 }
 
 /* Constructor for channel_data */
-static grpc_error* cc_init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_element* elem,
+static grpc_error* cc_init_channel_elem(grpc_channel_element* elem,
                                         grpc_channel_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   GPR_ASSERT(args->is_last);
@@ -711,7 +726,7 @@
   chand->interested_parties = grpc_pollset_set_create();
   grpc_connectivity_state_init(&chand->state_tracker, GRPC_CHANNEL_IDLE,
                                "client_channel");
-  grpc_client_channel_start_backup_polling(exec_ctx, chand->interested_parties);
+  grpc_client_channel_start_backup_polling(chand->interested_parties);
   // Record client channel factory.
   const grpc_arg* arg = grpc_channel_args_find(args->channel_args,
                                                GRPC_ARG_CLIENT_CHANNEL_FACTORY);
@@ -739,15 +754,15 @@
   }
   char* proxy_name = nullptr;
   grpc_channel_args* new_args = nullptr;
-  grpc_proxy_mappers_map_name(exec_ctx, arg->value.string, args->channel_args,
+  grpc_proxy_mappers_map_name(arg->value.string, args->channel_args,
                               &proxy_name, &new_args);
   // Instantiate resolver.
   chand->resolver = grpc_resolver_create(
-      exec_ctx, proxy_name != nullptr ? proxy_name : arg->value.string,
+      proxy_name != nullptr ? proxy_name : arg->value.string,
       new_args != nullptr ? new_args : args->channel_args,
       chand->interested_parties, chand->combiner);
   if (proxy_name != nullptr) gpr_free(proxy_name);
-  if (new_args != nullptr) grpc_channel_args_destroy(exec_ctx, new_args);
+  if (new_args != nullptr) grpc_channel_args_destroy(new_args);
   if (chand->resolver == nullptr) {
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING("resolver creation failed");
   }
@@ -756,32 +771,28 @@
   return GRPC_ERROR_NONE;
 }
 
-static void shutdown_resolver_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void shutdown_resolver_locked(void* arg, grpc_error* error) {
   grpc_resolver* resolver = (grpc_resolver*)arg;
-  grpc_resolver_shutdown_locked(exec_ctx, resolver);
-  GRPC_RESOLVER_UNREF(exec_ctx, resolver, "channel");
+  grpc_resolver_shutdown_locked(resolver);
+  GRPC_RESOLVER_UNREF(resolver, "channel");
 }
 
 /* Destructor for channel_data */
-static void cc_destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_element* elem) {
+static void cc_destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   if (chand->resolver != nullptr) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(shutdown_resolver_locked, chand->resolver,
                             grpc_combiner_scheduler(chand->combiner)),
         GRPC_ERROR_NONE);
   }
   if (chand->client_channel_factory != nullptr) {
-    grpc_client_channel_factory_unref(exec_ctx, chand->client_channel_factory);
+    grpc_client_channel_factory_unref(chand->client_channel_factory);
   }
   if (chand->lb_policy != nullptr) {
-    grpc_pollset_set_del_pollset_set(exec_ctx,
-                                     chand->lb_policy->interested_parties,
+    grpc_pollset_set_del_pollset_set(chand->lb_policy->interested_parties,
                                      chand->interested_parties);
-    GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
+    GRPC_LB_POLICY_UNREF(chand->lb_policy, "channel");
   }
   gpr_free(chand->info_lb_policy_name);
   gpr_free(chand->info_service_config_json);
@@ -789,12 +800,12 @@
     grpc_server_retry_throttle_data_unref(chand->retry_throttle_data);
   }
   if (chand->method_params_table != nullptr) {
-    grpc_slice_hash_table_unref(exec_ctx, chand->method_params_table);
+    grpc_slice_hash_table_unref(chand->method_params_table);
   }
-  grpc_client_channel_stop_backup_polling(exec_ctx, chand->interested_parties);
-  grpc_connectivity_state_destroy(exec_ctx, &chand->state_tracker);
-  grpc_pollset_set_destroy(exec_ctx, chand->interested_parties);
-  GRPC_COMBINER_UNREF(exec_ctx, chand->combiner, "client_channel");
+  grpc_client_channel_stop_backup_polling(chand->interested_parties);
+  grpc_connectivity_state_destroy(&chand->state_tracker);
+  grpc_pollset_set_destroy(chand->interested_parties);
+  GRPC_COMBINER_UNREF(chand->combiner, "client_channel");
   gpr_mu_destroy(&chand->info_mu);
   gpr_mu_destroy(&chand->external_connectivity_watcher_list_mu);
 }
@@ -881,21 +892,18 @@
 }
 
 // This is called via the call combiner, so access to calld is synchronized.
-static void fail_pending_batch_in_call_combiner(grpc_exec_ctx* exec_ctx,
-                                                void* arg, grpc_error* error) {
+static void fail_pending_batch_in_call_combiner(void* arg, grpc_error* error) {
   call_data* calld = (call_data*)arg;
   if (calld->waiting_for_pick_batches_count > 0) {
     --calld->waiting_for_pick_batches_count;
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx,
         calld->waiting_for_pick_batches[calld->waiting_for_pick_batches_count],
         GRPC_ERROR_REF(error), calld->call_combiner);
   }
 }
 
 // This is called via the call combiner, so access to calld is synchronized.
-static void waiting_for_pick_batches_fail(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+static void waiting_for_pick_batches_fail(grpc_call_element* elem,
                                           grpc_error* error) {
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
@@ -908,37 +916,34 @@
     GRPC_CLOSURE_INIT(&calld->handle_pending_batch_in_call_combiner[i],
                       fail_pending_batch_in_call_combiner, calld,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CALL_COMBINER_START(exec_ctx, calld->call_combiner,
-                             &calld->handle_pending_batch_in_call_combiner[i],
-                             GRPC_ERROR_REF(error),
-                             "waiting_for_pick_batches_fail");
+    GRPC_CALL_COMBINER_START(
+        calld->call_combiner, &calld->handle_pending_batch_in_call_combiner[i],
+        GRPC_ERROR_REF(error), "waiting_for_pick_batches_fail");
   }
   if (calld->initial_metadata_batch != nullptr) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->initial_metadata_batch, GRPC_ERROR_REF(error),
+        calld->initial_metadata_batch, GRPC_ERROR_REF(error),
         calld->call_combiner);
   } else {
-    GRPC_CALL_COMBINER_STOP(exec_ctx, calld->call_combiner,
+    GRPC_CALL_COMBINER_STOP(calld->call_combiner,
                             "waiting_for_pick_batches_fail");
   }
   GRPC_ERROR_UNREF(error);
 }
 
 // This is called via the call combiner, so access to calld is synchronized.
-static void run_pending_batch_in_call_combiner(grpc_exec_ctx* exec_ctx,
-                                               void* arg, grpc_error* ignored) {
+static void run_pending_batch_in_call_combiner(void* arg, grpc_error* ignored) {
   call_data* calld = (call_data*)arg;
   if (calld->waiting_for_pick_batches_count > 0) {
     --calld->waiting_for_pick_batches_count;
     grpc_subchannel_call_process_op(
-        exec_ctx, calld->subchannel_call,
+        calld->subchannel_call,
         calld->waiting_for_pick_batches[calld->waiting_for_pick_batches_count]);
   }
 }
 
 // This is called via the call combiner, so access to calld is synchronized.
-static void waiting_for_pick_batches_resume(grpc_exec_ctx* exec_ctx,
-                                            grpc_call_element* elem) {
+static void waiting_for_pick_batches_resume(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
@@ -952,20 +957,18 @@
     GRPC_CLOSURE_INIT(&calld->handle_pending_batch_in_call_combiner[i],
                       run_pending_batch_in_call_combiner, calld,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CALL_COMBINER_START(exec_ctx, calld->call_combiner,
-                             &calld->handle_pending_batch_in_call_combiner[i],
-                             GRPC_ERROR_NONE,
-                             "waiting_for_pick_batches_resume");
+    GRPC_CALL_COMBINER_START(
+        calld->call_combiner, &calld->handle_pending_batch_in_call_combiner[i],
+        GRPC_ERROR_NONE, "waiting_for_pick_batches_resume");
   }
   GPR_ASSERT(calld->initial_metadata_batch != nullptr);
-  grpc_subchannel_call_process_op(exec_ctx, calld->subchannel_call,
+  grpc_subchannel_call_process_op(calld->subchannel_call,
                                   calld->initial_metadata_batch);
 }
 
 // Applies service config to the call.  Must be invoked once we know
 // that the resolver has returned results to the channel.
-static void apply_service_config_to_call_locked(grpc_exec_ctx* exec_ctx,
-                                                grpc_call_element* elem) {
+static void apply_service_config_to_call_locked(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
@@ -978,7 +981,7 @@
   }
   if (chand->method_params_table != nullptr) {
     calld->method_params = (method_parameters*)grpc_method_config_table_get(
-        exec_ctx, chand->method_params_table, calld->path);
+        chand->method_params_table, calld->path);
     if (calld->method_params != nullptr) {
       method_parameters_ref(calld->method_params);
       // If the deadline from the service config is shorter than the one
@@ -990,15 +993,14 @@
             calld->method_params->timeout;
         if (per_method_deadline < calld->deadline) {
           calld->deadline = per_method_deadline;
-          grpc_deadline_state_reset(exec_ctx, elem, calld->deadline);
+          grpc_deadline_state_reset(elem, calld->deadline);
         }
       }
     }
   }
 }
 
-static void create_subchannel_call_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+static void create_subchannel_call_locked(grpc_call_element* elem,
                                           grpc_error* error) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -1012,24 +1014,22 @@
       calld->call_combiner             // call_combiner
   };
   grpc_error* new_error = grpc_connected_subchannel_create_call(
-      exec_ctx, calld->connected_subchannel, &call_args,
-      &calld->subchannel_call);
+      calld->connected_subchannel, &call_args, &calld->subchannel_call);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p calld=%p: create subchannel_call=%p: error=%s",
             chand, calld, calld->subchannel_call, grpc_error_string(new_error));
   }
   if (new_error != GRPC_ERROR_NONE) {
     new_error = grpc_error_add_child(new_error, error);
-    waiting_for_pick_batches_fail(exec_ctx, elem, new_error);
+    waiting_for_pick_batches_fail(elem, new_error);
   } else {
-    waiting_for_pick_batches_resume(exec_ctx, elem);
+    waiting_for_pick_batches_resume(elem);
   }
   GRPC_ERROR_UNREF(error);
 }
 
 // Invoked when a pick is completed, on both success or failure.
-static void pick_done_locked(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-                             grpc_error* error) {
+static void pick_done_locked(grpc_call_element* elem, grpc_error* error) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (calld->connected_subchannel == nullptr) {
@@ -1045,10 +1045,10 @@
               "chand=%p calld=%p: failed to create subchannel: error=%s", chand,
               calld, grpc_error_string(calld->error));
     }
-    waiting_for_pick_batches_fail(exec_ctx, elem, GRPC_ERROR_REF(calld->error));
+    waiting_for_pick_batches_fail(elem, GRPC_ERROR_REF(calld->error));
   } else {
     /* Create call on subchannel. */
-    create_subchannel_call_locked(exec_ctx, elem, GRPC_ERROR_REF(error));
+    create_subchannel_call_locked(elem, GRPC_ERROR_REF(error));
   }
   GRPC_ERROR_UNREF(error);
 }
@@ -1057,19 +1057,17 @@
 // either (a) the pick was deferred pending a resolver result or (b) the
 // pick was done asynchronously.  Removes the call's polling entity from
 // chand->interested_parties before invoking pick_done_locked().
-static void async_pick_done_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem, grpc_error* error) {
+static void async_pick_done_locked(grpc_call_element* elem, grpc_error* error) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
-  grpc_polling_entity_del_from_pollset_set(exec_ctx, calld->pollent,
+  grpc_polling_entity_del_from_pollset_set(calld->pollent,
                                            chand->interested_parties);
-  pick_done_locked(exec_ctx, elem, error);
+  pick_done_locked(elem, error);
 }
 
 // Note: This runs under the client_channel combiner, but will NOT be
 // holding the call combiner.
-static void pick_callback_cancel_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void pick_callback_cancel_locked(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -1078,17 +1076,15 @@
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: cancelling pick from LB policy %p",
               chand, calld, calld->lb_policy);
     }
-    grpc_lb_policy_cancel_pick_locked(exec_ctx, calld->lb_policy,
-                                      &calld->connected_subchannel,
-                                      GRPC_ERROR_REF(error));
+    grpc_lb_policy_cancel_pick_locked(
+        calld->lb_policy, &calld->connected_subchannel, GRPC_ERROR_REF(error));
   }
-  GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_callback_cancel");
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "pick_callback_cancel");
 }
 
 // Callback invoked by grpc_lb_policy_pick_locked() for async picks.
 // Unrefs the LB policy and invokes async_pick_done_locked().
-static void pick_callback_done_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void pick_callback_done_locked(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -1097,23 +1093,22 @@
             chand, calld);
   }
   GPR_ASSERT(calld->lb_policy != nullptr);
-  GRPC_LB_POLICY_UNREF(exec_ctx, calld->lb_policy, "pick_subchannel");
+  GRPC_LB_POLICY_UNREF(calld->lb_policy, "pick_subchannel");
   calld->lb_policy = nullptr;
-  async_pick_done_locked(exec_ctx, elem, GRPC_ERROR_REF(error));
+  async_pick_done_locked(elem, GRPC_ERROR_REF(error));
 }
 
 // Takes a ref to chand->lb_policy and calls grpc_lb_policy_pick_locked().
 // If the pick was completed synchronously, unrefs the LB policy and
 // returns true.
-static bool pick_callback_start_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_call_element* elem) {
+static bool pick_callback_start_locked(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p calld=%p: starting pick on lb_policy=%p",
             chand, calld, chand->lb_policy);
   }
-  apply_service_config_to_call_locked(exec_ctx, elem);
+  apply_service_config_to_call_locked(elem);
   // If the application explicitly set wait_for_ready, use that.
   // Otherwise, if the service config specified a value for this
   // method, use that.
@@ -1143,7 +1138,7 @@
   GRPC_CLOSURE_INIT(&calld->lb_pick_closure, pick_callback_done_locked, elem,
                     grpc_combiner_scheduler(chand->combiner));
   const bool pick_done = grpc_lb_policy_pick_locked(
-      exec_ctx, chand->lb_policy, &inputs, &calld->connected_subchannel,
+      chand->lb_policy, &inputs, &calld->connected_subchannel,
       calld->subchannel_call_context, nullptr, &calld->lb_pick_closure);
   if (pick_done) {
     /* synchronous grpc_lb_policy_pick call. Unref the LB policy. */
@@ -1151,12 +1146,12 @@
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: pick completed synchronously",
               chand, calld);
     }
-    GRPC_LB_POLICY_UNREF(exec_ctx, calld->lb_policy, "pick_subchannel");
+    GRPC_LB_POLICY_UNREF(calld->lb_policy, "pick_subchannel");
     calld->lb_policy = nullptr;
   } else {
     GRPC_CALL_STACK_REF(calld->owning_call, "pick_callback_cancel");
     grpc_call_combiner_set_notify_on_cancel(
-        exec_ctx, calld->call_combiner,
+        calld->call_combiner,
         GRPC_CLOSURE_INIT(&calld->lb_pick_cancel_closure,
                           pick_callback_cancel_locked, elem,
                           grpc_combiner_scheduler(chand->combiner)));
@@ -1173,8 +1168,7 @@
 
 // Note: This runs under the client_channel combiner, but will NOT be
 // holding the call combiner.
-static void pick_after_resolver_result_cancel_locked(grpc_exec_ctx* exec_ctx,
-                                                     void* arg,
+static void pick_after_resolver_result_cancel_locked(void* arg,
                                                      grpc_error* error) {
   pick_after_resolver_result_args* args = (pick_after_resolver_result_args*)arg;
   if (args->finished) {
@@ -1202,16 +1196,13 @@
   // it's safe to call async_pick_done_locked() here -- we are
   // essentially calling it here instead of calling it in
   // pick_after_resolver_result_done_locked().
-  async_pick_done_locked(exec_ctx, elem,
-                         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-                             "Pick cancelled", &error, 1));
+  async_pick_done_locked(elem, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                                   "Pick cancelled", &error, 1));
 }
 
-static void pick_after_resolver_result_start_locked(grpc_exec_ctx* exec_ctx,
-                                                    grpc_call_element* elem);
+static void pick_after_resolver_result_start_locked(grpc_call_element* elem);
 
-static void pick_after_resolver_result_done_locked(grpc_exec_ctx* exec_ctx,
-                                                   void* arg,
+static void pick_after_resolver_result_done_locked(void* arg,
                                                    grpc_error* error) {
   pick_after_resolver_result_args* args = (pick_after_resolver_result_args*)arg;
   if (args->finished) {
@@ -1231,19 +1222,19 @@
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: resolver failed to return data",
               chand, calld);
     }
-    async_pick_done_locked(exec_ctx, elem, GRPC_ERROR_REF(error));
+    async_pick_done_locked(elem, GRPC_ERROR_REF(error));
   } else if (chand->lb_policy != nullptr) {
     if (grpc_client_channel_trace.enabled()) {
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: resolver returned, doing pick",
               chand, calld);
     }
-    if (pick_callback_start_locked(exec_ctx, elem)) {
+    if (pick_callback_start_locked(elem)) {
       // Even if the LB policy returns a result synchronously, we have
       // already added our polling entity to chand->interested_parties
       // in order to wait for the resolver result, so we need to
       // remove it here.  Therefore, we call async_pick_done_locked()
       // instead of pick_done_locked().
-      async_pick_done_locked(exec_ctx, elem, GRPC_ERROR_NONE);
+      async_pick_done_locked(elem, GRPC_ERROR_NONE);
     }
   }
   // TODO(roth): It should be impossible for chand->lb_policy to be NULL
@@ -1261,19 +1252,18 @@
               "trying again",
               chand, calld);
     }
-    pick_after_resolver_result_start_locked(exec_ctx, elem);
+    pick_after_resolver_result_start_locked(elem);
   } else {
     if (grpc_client_channel_trace.enabled()) {
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: resolver disconnected", chand,
               calld);
     }
     async_pick_done_locked(
-        exec_ctx, elem, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Disconnected"));
+        elem, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Disconnected"));
   }
 }
 
-static void pick_after_resolver_result_start_locked(grpc_exec_ctx* exec_ctx,
-                                                    grpc_call_element* elem) {
+static void pick_after_resolver_result_start_locked(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   if (grpc_client_channel_trace.enabled()) {
@@ -1289,47 +1279,46 @@
   grpc_closure_list_append(&chand->waiting_for_resolver_result_closures,
                            &args->closure, GRPC_ERROR_NONE);
   grpc_call_combiner_set_notify_on_cancel(
-      exec_ctx, calld->call_combiner,
+      calld->call_combiner,
       GRPC_CLOSURE_INIT(&args->cancel_closure,
                         pick_after_resolver_result_cancel_locked, args,
                         grpc_combiner_scheduler(chand->combiner)));
 }
 
-static void start_pick_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* ignored) {
+static void start_pick_locked(void* arg, grpc_error* ignored) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   GPR_ASSERT(calld->connected_subchannel == nullptr);
   if (chand->lb_policy != nullptr) {
     // We already have an LB policy, so ask it for a pick.
-    if (pick_callback_start_locked(exec_ctx, elem)) {
+    if (pick_callback_start_locked(elem)) {
       // Pick completed synchronously.
-      pick_done_locked(exec_ctx, elem, GRPC_ERROR_NONE);
+      pick_done_locked(elem, GRPC_ERROR_NONE);
       return;
     }
   } else {
     // We do not yet have an LB policy, so wait for a resolver result.
     if (chand->resolver == nullptr) {
-      pick_done_locked(exec_ctx, elem,
+      pick_done_locked(elem,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Disconnected"));
       return;
     }
     if (!chand->started_resolving) {
-      start_resolving_locked(exec_ctx, chand);
+      start_resolving_locked(chand);
     }
-    pick_after_resolver_result_start_locked(exec_ctx, elem);
+    pick_after_resolver_result_start_locked(elem);
   }
   // We need to wait for either a resolver result or for an async result
   // from the LB policy.  Add the polling entity from call_data to the
   // channel_data's interested_parties, so that the I/O of the LB policy
   // and resolver can be done under it.  The polling entity will be
   // removed in async_pick_done_locked().
-  grpc_polling_entity_add_to_pollset_set(exec_ctx, calld->pollent,
+  grpc_polling_entity_add_to_pollset_set(calld->pollent,
                                          chand->interested_parties);
 }
 
-static void on_complete(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_complete(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (calld->retry_throttle_data != nullptr) {
@@ -1345,18 +1334,15 @@
           calld->retry_throttle_data);
     }
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_on_complete,
-                   GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(calld->original_on_complete, GRPC_ERROR_REF(error));
 }
 
 static void cc_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (chand->deadline_checking_enabled) {
-    grpc_deadline_state_client_start_transport_stream_op_batch(exec_ctx, elem,
-                                                               batch);
+    grpc_deadline_state_client_start_transport_stream_op_batch(elem, batch);
   }
   GPR_TIMER_BEGIN("cc_start_transport_stream_op_batch", 0);
   // If we've previously been cancelled, immediately fail any new batches.
@@ -1366,7 +1352,7 @@
               chand, calld, grpc_error_string(calld->error));
     }
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, batch, GRPC_ERROR_REF(calld->error), calld->call_combiner);
+        batch, GRPC_ERROR_REF(calld->error), calld->call_combiner);
     goto done;
   }
   if (batch->cancel_stream) {
@@ -1384,11 +1370,10 @@
     // If we have a subchannel call, send the cancellation batch down.
     // Otherwise, fail all pending batches.
     if (calld->subchannel_call != nullptr) {
-      grpc_subchannel_call_process_op(exec_ctx, calld->subchannel_call, batch);
+      grpc_subchannel_call_process_op(calld->subchannel_call, batch);
     } else {
       waiting_for_pick_batches_add(calld, batch);
-      waiting_for_pick_batches_fail(exec_ctx, elem,
-                                    GRPC_ERROR_REF(calld->error));
+      waiting_for_pick_batches_fail(elem, GRPC_ERROR_REF(calld->error));
     }
     goto done;
   }
@@ -1411,7 +1396,7 @@
               "chand=%p calld=%p: sending batch to subchannel_call=%p", chand,
               calld, calld->subchannel_call);
     }
-    grpc_subchannel_call_process_op(exec_ctx, calld->subchannel_call, batch);
+    grpc_subchannel_call_process_op(calld->subchannel_call, batch);
     goto done;
   }
   // We do not yet have a subchannel call.
@@ -1425,7 +1410,6 @@
               chand, calld);
     }
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_INIT(&batch->handler_private.closure, start_pick_locked,
                           elem, grpc_combiner_scheduler(chand->combiner)),
         GRPC_ERROR_NONE);
@@ -1436,7 +1420,7 @@
               "chand=%p calld=%p: saved batch, yeilding call combiner", chand,
               calld);
     }
-    GRPC_CALL_COMBINER_STOP(exec_ctx, calld->call_combiner,
+    GRPC_CALL_COMBINER_STOP(calld->call_combiner,
                             "batch does not include send_initial_metadata");
   }
 done:
@@ -1444,8 +1428,7 @@
 }
 
 /* Constructor for call_data */
-static grpc_error* cc_init_call_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+static grpc_error* cc_init_call_elem(grpc_call_element* elem,
                                      const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -1457,23 +1440,22 @@
   calld->owning_call = args->call_stack;
   calld->call_combiner = args->call_combiner;
   if (chand->deadline_checking_enabled) {
-    grpc_deadline_state_init(exec_ctx, elem, args->call_stack,
-                             args->call_combiner, calld->deadline);
+    grpc_deadline_state_init(elem, args->call_stack, args->call_combiner,
+                             calld->deadline);
   }
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for call_data */
-static void cc_destroy_call_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_element* elem,
+static void cc_destroy_call_elem(grpc_call_element* elem,
                                  const grpc_call_final_info* final_info,
                                  grpc_closure* then_schedule_closure) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (chand->deadline_checking_enabled) {
-    grpc_deadline_state_destroy(exec_ctx, elem);
+    grpc_deadline_state_destroy(elem);
   }
-  grpc_slice_unref_internal(exec_ctx, calld->path);
+  grpc_slice_unref_internal(calld->path);
   if (calld->method_params != nullptr) {
     method_parameters_unref(calld->method_params);
   }
@@ -1482,14 +1464,13 @@
     grpc_subchannel_call_set_cleanup_closure(calld->subchannel_call,
                                              then_schedule_closure);
     then_schedule_closure = nullptr;
-    GRPC_SUBCHANNEL_CALL_UNREF(exec_ctx, calld->subchannel_call,
+    GRPC_SUBCHANNEL_CALL_UNREF(calld->subchannel_call,
                                "client_channel_destroy_call");
   }
   GPR_ASSERT(calld->lb_policy == nullptr);
   GPR_ASSERT(calld->waiting_for_pick_batches_count == 0);
   if (calld->connected_subchannel != nullptr) {
-    GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, calld->connected_subchannel,
-                                    "picked");
+    GRPC_CONNECTED_SUBCHANNEL_UNREF(calld->connected_subchannel, "picked");
   }
   for (size_t i = 0; i < GRPC_CONTEXT_COUNT; ++i) {
     if (calld->subchannel_call_context[i].value != nullptr) {
@@ -1497,11 +1478,10 @@
           calld->subchannel_call_context[i].value);
     }
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, then_schedule_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(then_schedule_closure, GRPC_ERROR_NONE);
 }
 
-static void cc_set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+static void cc_set_pollset_or_pollset_set(grpc_call_element* elem,
                                           grpc_polling_entity* pollent) {
   call_data* calld = (call_data*)elem->call_data;
   calld->pollent = pollent;
@@ -1525,29 +1505,27 @@
     "client-channel",
 };
 
-static void try_to_connect_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                  grpc_error* error_ignored) {
+static void try_to_connect_locked(void* arg, grpc_error* error_ignored) {
   channel_data* chand = (channel_data*)arg;
   if (chand->lb_policy != nullptr) {
-    grpc_lb_policy_exit_idle_locked(exec_ctx, chand->lb_policy);
+    grpc_lb_policy_exit_idle_locked(chand->lb_policy);
   } else {
     chand->exit_idle_when_lb_policy_arrives = true;
     if (!chand->started_resolving && chand->resolver != nullptr) {
-      start_resolving_locked(exec_ctx, chand);
+      start_resolving_locked(chand);
     }
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "try_to_connect");
+  GRPC_CHANNEL_STACK_UNREF(chand->owning_stack, "try_to_connect");
 }
 
 grpc_connectivity_state grpc_client_channel_check_connectivity_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_element* elem, int try_to_connect) {
+    grpc_channel_element* elem, int try_to_connect) {
   channel_data* chand = (channel_data*)elem->channel_data;
   grpc_connectivity_state out =
       grpc_connectivity_state_check(&chand->state_tracker);
   if (out == GRPC_CHANNEL_IDLE && try_to_connect) {
     GRPC_CHANNEL_STACK_REF(chand->owning_stack, "try_to_connect");
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(try_to_connect_locked, chand,
                             grpc_combiner_scheduler(chand->combiner)),
         GRPC_ERROR_NONE);
@@ -1628,50 +1606,49 @@
   return count;
 }
 
-static void on_external_watch_complete_locked(grpc_exec_ctx* exec_ctx,
-                                              void* arg, grpc_error* error) {
+static void on_external_watch_complete_locked(void* arg, grpc_error* error) {
   external_connectivity_watcher* w = (external_connectivity_watcher*)arg;
   grpc_closure* follow_up = w->on_complete;
-  grpc_polling_entity_del_from_pollset_set(exec_ctx, &w->pollent,
+  grpc_polling_entity_del_from_pollset_set(&w->pollent,
                                            w->chand->interested_parties);
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack,
+  GRPC_CHANNEL_STACK_UNREF(w->chand->owning_stack,
                            "external_connectivity_watcher");
   external_connectivity_watcher_list_remove(w->chand, w);
   gpr_free(w);
-  GRPC_CLOSURE_RUN(exec_ctx, follow_up, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(follow_up, GRPC_ERROR_REF(error));
 }
 
-static void watch_connectivity_state_locked(grpc_exec_ctx* exec_ctx, void* arg,
+static void watch_connectivity_state_locked(void* arg,
                                             grpc_error* error_ignored) {
   external_connectivity_watcher* w = (external_connectivity_watcher*)arg;
   external_connectivity_watcher* found = nullptr;
   if (w->state != nullptr) {
     external_connectivity_watcher_list_append(w->chand, w);
-    GRPC_CLOSURE_RUN(exec_ctx, w->watcher_timer_init, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_RUN(w->watcher_timer_init, GRPC_ERROR_NONE);
     GRPC_CLOSURE_INIT(&w->my_closure, on_external_watch_complete_locked, w,
                       grpc_combiner_scheduler(w->chand->combiner));
-    grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &w->chand->state_tracker, w->state, &w->my_closure);
+    grpc_connectivity_state_notify_on_state_change(&w->chand->state_tracker,
+                                                   w->state, &w->my_closure);
   } else {
     GPR_ASSERT(w->watcher_timer_init == nullptr);
     found = lookup_external_connectivity_watcher(w->chand, w->on_complete);
     if (found) {
       GPR_ASSERT(found->on_complete == w->on_complete);
       grpc_connectivity_state_notify_on_state_change(
-          exec_ctx, &found->chand->state_tracker, nullptr, &found->my_closure);
+          &found->chand->state_tracker, nullptr, &found->my_closure);
     }
-    grpc_polling_entity_del_from_pollset_set(exec_ctx, &w->pollent,
+    grpc_polling_entity_del_from_pollset_set(&w->pollent,
                                              w->chand->interested_parties);
-    GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack,
+    GRPC_CHANNEL_STACK_UNREF(w->chand->owning_stack,
                              "external_connectivity_watcher");
     gpr_free(w);
   }
 }
 
 void grpc_client_channel_watch_connectivity_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-    grpc_polling_entity pollent, grpc_connectivity_state* state,
-    grpc_closure* closure, grpc_closure* watcher_timer_init) {
+    grpc_channel_element* elem, grpc_polling_entity pollent,
+    grpc_connectivity_state* state, grpc_closure* closure,
+    grpc_closure* watcher_timer_init) {
   channel_data* chand = (channel_data*)elem->channel_data;
   external_connectivity_watcher* w =
       (external_connectivity_watcher*)gpr_zalloc(sizeof(*w));
@@ -1680,12 +1657,11 @@
   w->on_complete = closure;
   w->state = state;
   w->watcher_timer_init = watcher_timer_init;
-  grpc_polling_entity_add_to_pollset_set(exec_ctx, &w->pollent,
+  grpc_polling_entity_add_to_pollset_set(&w->pollent,
                                          chand->interested_parties);
   GRPC_CHANNEL_STACK_REF(w->chand->owning_stack,
                          "external_connectivity_watcher");
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&w->my_closure, watch_connectivity_state_locked, w,
                         grpc_combiner_scheduler(chand->combiner)),
       GRPC_ERROR_NONE);
diff --git a/src/core/ext/filters/client_channel/client_channel.h b/src/core/ext/filters/client_channel/client_channel.h
index 48e4637..9670405 100644
--- a/src/core/ext/filters/client_channel/client_channel.h
+++ b/src/core/ext/filters/client_channel/client_channel.h
@@ -38,15 +38,15 @@
 extern const grpc_channel_filter grpc_client_channel_filter;
 
 grpc_connectivity_state grpc_client_channel_check_connectivity_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_element* elem, int try_to_connect);
+    grpc_channel_element* elem, int try_to_connect);
 
 int grpc_client_channel_num_external_connectivity_watchers(
     grpc_channel_element* elem);
 
 void grpc_client_channel_watch_connectivity_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-    grpc_polling_entity pollent, grpc_connectivity_state* state,
-    grpc_closure* on_complete, grpc_closure* watcher_timer_init);
+    grpc_channel_element* elem, grpc_polling_entity pollent,
+    grpc_connectivity_state* state, grpc_closure* on_complete,
+    grpc_closure* watcher_timer_init);
 
 /* Debug helper: pull the subchannel call from a call stack element */
 grpc_subchannel_call* grpc_client_channel_get_subchannel_call(
diff --git a/src/core/ext/filters/client_channel/client_channel_factory.cc b/src/core/ext/filters/client_channel/client_channel_factory.cc
index 57eac8f..60c95d7 100644
--- a/src/core/ext/filters/client_channel/client_channel_factory.cc
+++ b/src/core/ext/filters/client_channel/client_channel_factory.cc
@@ -23,23 +23,19 @@
   factory->vtable->ref(factory);
 }
 
-void grpc_client_channel_factory_unref(grpc_exec_ctx* exec_ctx,
-                                       grpc_client_channel_factory* factory) {
-  factory->vtable->unref(exec_ctx, factory);
+void grpc_client_channel_factory_unref(grpc_client_channel_factory* factory) {
+  factory->vtable->unref(factory);
 }
 
 grpc_subchannel* grpc_client_channel_factory_create_subchannel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory,
-    const grpc_subchannel_args* args) {
-  return factory->vtable->create_subchannel(exec_ctx, factory, args);
+    grpc_client_channel_factory* factory, const grpc_subchannel_args* args) {
+  return factory->vtable->create_subchannel(factory, args);
 }
 
 grpc_channel* grpc_client_channel_factory_create_channel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory,
-    const char* target, grpc_client_channel_type type,
-    const grpc_channel_args* args) {
-  return factory->vtable->create_client_channel(exec_ctx, factory, target, type,
-                                                args);
+    grpc_client_channel_factory* factory, const char* target,
+    grpc_client_channel_type type, const grpc_channel_args* args) {
+  return factory->vtable->create_client_channel(factory, target, type, args);
 }
 
 static void* factory_arg_copy(void* factory) {
@@ -47,9 +43,8 @@
   return factory;
 }
 
-static void factory_arg_destroy(grpc_exec_ctx* exec_ctx, void* factory) {
-  grpc_client_channel_factory_unref(exec_ctx,
-                                    (grpc_client_channel_factory*)factory);
+static void factory_arg_destroy(void* factory) {
+  grpc_client_channel_factory_unref((grpc_client_channel_factory*)factory);
 }
 
 static int factory_arg_cmp(void* factory1, void* factory2) {
diff --git a/src/core/ext/filters/client_channel/client_channel_factory.h b/src/core/ext/filters/client_channel/client_channel_factory.h
index db82b73..766ebb9 100644
--- a/src/core/ext/filters/client_channel/client_channel_factory.h
+++ b/src/core/ext/filters/client_channel/client_channel_factory.h
@@ -45,31 +45,26 @@
 
 struct grpc_client_channel_factory_vtable {
   void (*ref)(grpc_client_channel_factory* factory);
-  void (*unref)(grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory);
-  grpc_subchannel* (*create_subchannel)(grpc_exec_ctx* exec_ctx,
-                                        grpc_client_channel_factory* factory,
+  void (*unref)(grpc_client_channel_factory* factory);
+  grpc_subchannel* (*create_subchannel)(grpc_client_channel_factory* factory,
                                         const grpc_subchannel_args* args);
-  grpc_channel* (*create_client_channel)(grpc_exec_ctx* exec_ctx,
-                                         grpc_client_channel_factory* factory,
+  grpc_channel* (*create_client_channel)(grpc_client_channel_factory* factory,
                                          const char* target,
                                          grpc_client_channel_type type,
                                          const grpc_channel_args* args);
 };
 
 void grpc_client_channel_factory_ref(grpc_client_channel_factory* factory);
-void grpc_client_channel_factory_unref(grpc_exec_ctx* exec_ctx,
-                                       grpc_client_channel_factory* factory);
+void grpc_client_channel_factory_unref(grpc_client_channel_factory* factory);
 
 /** Create a new grpc_subchannel */
 grpc_subchannel* grpc_client_channel_factory_create_subchannel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory,
-    const grpc_subchannel_args* args);
+    grpc_client_channel_factory* factory, const grpc_subchannel_args* args);
 
 /** Create a new grpc_channel */
 grpc_channel* grpc_client_channel_factory_create_channel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* factory,
-    const char* target, grpc_client_channel_type type,
-    const grpc_channel_args* args);
+    grpc_client_channel_factory* factory, const char* target,
+    grpc_client_channel_type type, const grpc_channel_args* args);
 
 grpc_arg grpc_client_channel_factory_create_channel_arg(
     grpc_client_channel_factory* factory);
diff --git a/src/core/ext/filters/client_channel/client_channel_plugin.cc b/src/core/ext/filters/client_channel/client_channel_plugin.cc
index 7a5bb18..ea630d2 100644
--- a/src/core/ext/filters/client_channel/client_channel_plugin.cc
+++ b/src/core/ext/filters/client_channel/client_channel_plugin.cc
@@ -34,14 +34,12 @@
 #include "src/core/ext/filters/client_channel/subchannel_index.h"
 #include "src/core/lib/surface/channel_init.h"
 
-static bool append_filter(grpc_exec_ctx* exec_ctx,
-                          grpc_channel_stack_builder* builder, void* arg) {
+static bool append_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_append_filter(
       builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
 }
 
-static bool set_default_host_if_unset(grpc_exec_ctx* exec_ctx,
-                                      grpc_channel_stack_builder* builder,
+static bool set_default_host_if_unset(grpc_channel_stack_builder* builder,
                                       void* unused) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
@@ -52,15 +50,14 @@
     }
   }
   char* default_authority = grpc_get_default_authority(
-      exec_ctx, grpc_channel_stack_builder_get_target(builder));
+      grpc_channel_stack_builder_get_target(builder));
   if (default_authority != nullptr) {
     grpc_arg arg = grpc_channel_arg_string_create(
         (char*)GRPC_ARG_DEFAULT_AUTHORITY, default_authority);
     grpc_channel_args* new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
-    grpc_channel_stack_builder_set_channel_arguments(exec_ctx, builder,
-                                                     new_args);
+    grpc_channel_stack_builder_set_channel_arguments(builder, new_args);
     gpr_free(default_authority);
-    grpc_channel_args_destroy(exec_ctx, new_args);
+    grpc_channel_args_destroy(new_args);
   }
   return true;
 }
diff --git a/src/core/ext/filters/client_channel/connector.cc b/src/core/ext/filters/client_channel/connector.cc
index c258468..c8bf2f3 100644
--- a/src/core/ext/filters/client_channel/connector.cc
+++ b/src/core/ext/filters/client_channel/connector.cc
@@ -23,18 +23,17 @@
   return connector;
 }
 
-void grpc_connector_unref(grpc_exec_ctx* exec_ctx, grpc_connector* connector) {
-  connector->vtable->unref(exec_ctx, connector);
+void grpc_connector_unref(grpc_connector* connector) {
+  connector->vtable->unref(connector);
 }
 
-void grpc_connector_connect(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
+void grpc_connector_connect(grpc_connector* connector,
                             const grpc_connect_in_args* in_args,
                             grpc_connect_out_args* out_args,
                             grpc_closure* notify) {
-  connector->vtable->connect(exec_ctx, connector, in_args, out_args, notify);
+  connector->vtable->connect(connector, in_args, out_args, notify);
 }
 
-void grpc_connector_shutdown(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
-                             grpc_error* why) {
-  connector->vtable->shutdown(exec_ctx, connector, why);
+void grpc_connector_shutdown(grpc_connector* connector, grpc_error* why) {
+  connector->vtable->shutdown(connector, why);
 }
diff --git a/src/core/ext/filters/client_channel/connector.h b/src/core/ext/filters/client_channel/connector.h
index 239ed8a..d657658 100644
--- a/src/core/ext/filters/client_channel/connector.h
+++ b/src/core/ext/filters/client_channel/connector.h
@@ -49,25 +49,23 @@
 
 struct grpc_connector_vtable {
   void (*ref)(grpc_connector* connector);
-  void (*unref)(grpc_exec_ctx* exec_ctx, grpc_connector* connector);
+  void (*unref)(grpc_connector* connector);
   /** Implementation of grpc_connector_shutdown */
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
-                   grpc_error* why);
+  void (*shutdown)(grpc_connector* connector, grpc_error* why);
   /** Implementation of grpc_connector_connect */
-  void (*connect)(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
+  void (*connect)(grpc_connector* connector,
                   const grpc_connect_in_args* in_args,
                   grpc_connect_out_args* out_args, grpc_closure* notify);
 };
 
 grpc_connector* grpc_connector_ref(grpc_connector* connector);
-void grpc_connector_unref(grpc_exec_ctx* exec_ctx, grpc_connector* connector);
+void grpc_connector_unref(grpc_connector* connector);
 /** Connect using the connector: max one outstanding call at a time */
-void grpc_connector_connect(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
+void grpc_connector_connect(grpc_connector* connector,
                             const grpc_connect_in_args* in_args,
                             grpc_connect_out_args* out_args,
                             grpc_closure* notify);
 /** Cancel any pending connection */
-void grpc_connector_shutdown(grpc_exec_ctx* exec_ctx, grpc_connector* connector,
-                             grpc_error* why);
+void grpc_connector_shutdown(grpc_connector* connector, grpc_error* why);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CONNECTOR_H */
diff --git a/src/core/ext/filters/client_channel/http_connect_handshaker.cc b/src/core/ext/filters/client_channel/http_connect_handshaker.cc
index b7cb2e3..556a3bc 100644
--- a/src/core/ext/filters/client_channel/http_connect_handshaker.cc
+++ b/src/core/ext/filters/client_channel/http_connect_handshaker.cc
@@ -61,41 +61,38 @@
 } http_connect_handshaker;
 
 // Unref and clean up handshaker.
-static void http_connect_handshaker_unref(grpc_exec_ctx* exec_ctx,
-                                          http_connect_handshaker* handshaker) {
+static void http_connect_handshaker_unref(http_connect_handshaker* handshaker) {
   if (gpr_unref(&handshaker->refcount)) {
     gpr_mu_destroy(&handshaker->mu);
     if (handshaker->endpoint_to_destroy != nullptr) {
-      grpc_endpoint_destroy(exec_ctx, handshaker->endpoint_to_destroy);
+      grpc_endpoint_destroy(handshaker->endpoint_to_destroy);
     }
     if (handshaker->read_buffer_to_destroy != nullptr) {
-      grpc_slice_buffer_destroy_internal(exec_ctx,
-                                         handshaker->read_buffer_to_destroy);
+      grpc_slice_buffer_destroy_internal(handshaker->read_buffer_to_destroy);
       gpr_free(handshaker->read_buffer_to_destroy);
     }
-    grpc_slice_buffer_destroy_internal(exec_ctx, &handshaker->write_buffer);
+    grpc_slice_buffer_destroy_internal(&handshaker->write_buffer);
     grpc_http_parser_destroy(&handshaker->http_parser);
     grpc_http_response_destroy(&handshaker->http_response);
     gpr_free(handshaker);
   }
 }
 
-// Set args fields to NULL, saving the endpoint and read buffer for
+// Set args fields to nullptr, saving the endpoint and read buffer for
 // later destruction.
 static void cleanup_args_for_failure_locked(
-    grpc_exec_ctx* exec_ctx, http_connect_handshaker* handshaker) {
+    http_connect_handshaker* handshaker) {
   handshaker->endpoint_to_destroy = handshaker->args->endpoint;
   handshaker->args->endpoint = nullptr;
   handshaker->read_buffer_to_destroy = handshaker->args->read_buffer;
   handshaker->args->read_buffer = nullptr;
-  grpc_channel_args_destroy(exec_ctx, handshaker->args->args);
+  grpc_channel_args_destroy(handshaker->args->args);
   handshaker->args->args = nullptr;
 }
 
 // If the handshake failed or we're shutting down, clean up and invoke the
 // callback with the error.
-static void handshake_failed_locked(grpc_exec_ctx* exec_ctx,
-                                    http_connect_handshaker* handshaker,
+static void handshake_failed_locked(http_connect_handshaker* handshaker,
                                     grpc_error* error) {
   if (error == GRPC_ERROR_NONE) {
     // If we were shut down after an endpoint operation succeeded but
@@ -108,34 +105,32 @@
     // before destroying them, even if we know that there are no
     // pending read/write callbacks.  This should be fixed, at which
     // point this can be removed.
-    grpc_endpoint_shutdown(exec_ctx, handshaker->args->endpoint,
-                           GRPC_ERROR_REF(error));
+    grpc_endpoint_shutdown(handshaker->args->endpoint, GRPC_ERROR_REF(error));
     // Not shutting down, so the handshake failed.  Clean up before
     // invoking the callback.
-    cleanup_args_for_failure_locked(exec_ctx, handshaker);
+    cleanup_args_for_failure_locked(handshaker);
     // Set shutdown to true so that subsequent calls to
     // http_connect_handshaker_shutdown() do nothing.
     handshaker->shutdown = true;
   }
   // Invoke callback.
-  GRPC_CLOSURE_SCHED(exec_ctx, handshaker->on_handshake_done, error);
+  GRPC_CLOSURE_SCHED(handshaker->on_handshake_done, error);
 }
 
 // Callback invoked when finished writing HTTP CONNECT request.
-static void on_write_done(grpc_exec_ctx* exec_ctx, void* arg,
-                          grpc_error* error) {
+static void on_write_done(void* arg, grpc_error* error) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)arg;
   gpr_mu_lock(&handshaker->mu);
   if (error != GRPC_ERROR_NONE || handshaker->shutdown) {
     // If the write failed or we're shutting down, clean up and invoke the
     // callback with the error.
-    handshake_failed_locked(exec_ctx, handshaker, GRPC_ERROR_REF(error));
+    handshake_failed_locked(handshaker, GRPC_ERROR_REF(error));
     gpr_mu_unlock(&handshaker->mu);
-    http_connect_handshaker_unref(exec_ctx, handshaker);
+    http_connect_handshaker_unref(handshaker);
   } else {
     // Otherwise, read the response.
     // The read callback inherits our ref to the handshaker.
-    grpc_endpoint_read(exec_ctx, handshaker->args->endpoint,
+    grpc_endpoint_read(handshaker->args->endpoint,
                        handshaker->args->read_buffer,
                        &handshaker->response_read_closure);
     gpr_mu_unlock(&handshaker->mu);
@@ -143,14 +138,13 @@
 }
 
 // Callback invoked for reading HTTP CONNECT response.
-static void on_read_done(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void on_read_done(void* arg, grpc_error* error) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)arg;
   gpr_mu_lock(&handshaker->mu);
   if (error != GRPC_ERROR_NONE || handshaker->shutdown) {
     // If the read failed or we're shutting down, clean up and invoke the
     // callback with the error.
-    handshake_failed_locked(exec_ctx, handshaker, GRPC_ERROR_REF(error));
+    handshake_failed_locked(handshaker, GRPC_ERROR_REF(error));
     goto done;
   }
   // Add buffer to parser.
@@ -161,7 +155,7 @@
                                      handshaker->args->read_buffer->slices[i],
                                      &body_start_offset);
       if (error != GRPC_ERROR_NONE) {
-        handshake_failed_locked(exec_ctx, handshaker, error);
+        handshake_failed_locked(handshaker, error);
         goto done;
       }
       if (handshaker->http_parser.state == GRPC_HTTP_BODY) {
@@ -180,7 +174,7 @@
                                &handshaker->args->read_buffer->slices[i + 1],
                                handshaker->args->read_buffer->count - i - 1);
         grpc_slice_buffer_swap(handshaker->args->read_buffer, &tmp_buffer);
-        grpc_slice_buffer_destroy_internal(exec_ctx, &tmp_buffer);
+        grpc_slice_buffer_destroy_internal(&tmp_buffer);
         break;
       }
     }
@@ -197,9 +191,8 @@
   // complete (e.g., handling chunked transfer encoding or looking
   // at the Content-Length: header).
   if (handshaker->http_parser.state != GRPC_HTTP_BODY) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                               handshaker->args->read_buffer);
-    grpc_endpoint_read(exec_ctx, handshaker->args->endpoint,
+    grpc_slice_buffer_reset_and_unref_internal(handshaker->args->read_buffer);
+    grpc_endpoint_read(handshaker->args->endpoint,
                        handshaker->args->read_buffer,
                        &handshaker->response_read_closure);
     gpr_mu_unlock(&handshaker->mu);
@@ -213,48 +206,44 @@
                  handshaker->http_response.status);
     error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
     gpr_free(msg);
-    handshake_failed_locked(exec_ctx, handshaker, error);
+    handshake_failed_locked(handshaker, error);
     goto done;
   }
   // Success.  Invoke handshake-done callback.
-  GRPC_CLOSURE_SCHED(exec_ctx, handshaker->on_handshake_done, error);
+  GRPC_CLOSURE_SCHED(handshaker->on_handshake_done, error);
 done:
   // Set shutdown to true so that subsequent calls to
   // http_connect_handshaker_shutdown() do nothing.
   handshaker->shutdown = true;
   gpr_mu_unlock(&handshaker->mu);
-  http_connect_handshaker_unref(exec_ctx, handshaker);
+  http_connect_handshaker_unref(handshaker);
 }
 
 //
 // Public handshaker methods
 //
 
-static void http_connect_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                                            grpc_handshaker* handshaker_in) {
+static void http_connect_handshaker_destroy(grpc_handshaker* handshaker_in) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
-  http_connect_handshaker_unref(exec_ctx, handshaker);
+  http_connect_handshaker_unref(handshaker);
 }
 
-static void http_connect_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                                             grpc_handshaker* handshaker_in,
+static void http_connect_handshaker_shutdown(grpc_handshaker* handshaker_in,
                                              grpc_error* why) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
   gpr_mu_lock(&handshaker->mu);
   if (!handshaker->shutdown) {
     handshaker->shutdown = true;
-    grpc_endpoint_shutdown(exec_ctx, handshaker->args->endpoint,
-                           GRPC_ERROR_REF(why));
-    cleanup_args_for_failure_locked(exec_ctx, handshaker);
+    grpc_endpoint_shutdown(handshaker->args->endpoint, GRPC_ERROR_REF(why));
+    cleanup_args_for_failure_locked(handshaker);
   }
   gpr_mu_unlock(&handshaker->mu);
   GRPC_ERROR_UNREF(why);
 }
 
 static void http_connect_handshaker_do_handshake(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker_in,
-    grpc_tcp_server_acceptor* acceptor, grpc_closure* on_handshake_done,
-    grpc_handshaker_args* args) {
+    grpc_handshaker* handshaker_in, grpc_tcp_server_acceptor* acceptor,
+    grpc_closure* on_handshake_done, grpc_handshaker_args* args) {
   http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
   // Check for HTTP CONNECT channel arg.
   // If not found, invoke on_handshake_done without doing anything.
@@ -266,7 +255,7 @@
     gpr_mu_lock(&handshaker->mu);
     handshaker->shutdown = true;
     gpr_mu_unlock(&handshaker->mu);
-    GRPC_CLOSURE_SCHED(exec_ctx, on_handshake_done, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(on_handshake_done, GRPC_ERROR_NONE);
     return;
   }
   GPR_ASSERT(arg->type == GRPC_ARG_STRING);
@@ -324,7 +313,7 @@
   gpr_free(header_strings);
   // Take a new ref to be held by the write callback.
   gpr_ref(&handshaker->refcount);
-  grpc_endpoint_write(exec_ctx, args->endpoint, &handshaker->write_buffer,
+  grpc_endpoint_write(args->endpoint, &handshaker->write_buffer,
                       &handshaker->request_done_closure);
   gpr_mu_unlock(&handshaker->mu);
 }
@@ -355,14 +344,13 @@
 //
 
 static void handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* factory,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory* factory, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   grpc_handshake_manager_add(handshake_mgr,
                              grpc_http_connect_handshaker_create());
 }
 
-static void handshaker_factory_destroy(grpc_exec_ctx* exec_ctx,
-                                       grpc_handshaker_factory* factory) {}
+static void handshaker_factory_destroy(grpc_handshaker_factory* factory) {}
 
 static const grpc_handshaker_factory_vtable handshaker_factory_vtable = {
     handshaker_factory_add_handshakers, handshaker_factory_destroy};
diff --git a/src/core/ext/filters/client_channel/http_proxy.cc b/src/core/ext/filters/client_channel/http_proxy.cc
index 405d8c0..2eafeee 100644
--- a/src/core/ext/filters/client_channel/http_proxy.cc
+++ b/src/core/ext/filters/client_channel/http_proxy.cc
@@ -36,19 +36,18 @@
 
 /**
  * Parses the 'http_proxy' env var and returns the proxy hostname to resolve or
- * NULL on error. Also sets 'user_cred' to user credentials if present in the
+ * nullptr on error. Also sets 'user_cred' to user credentials if present in the
  * 'http_proxy' env var, otherwise leaves it unchanged. It is caller's
  * responsibility to gpr_free user_cred.
  */
-static char* get_http_proxy_server(grpc_exec_ctx* exec_ctx, char** user_cred) {
+static char* get_http_proxy_server(char** user_cred) {
   GPR_ASSERT(user_cred != nullptr);
   char* proxy_name = nullptr;
   char* uri_str = gpr_getenv("http_proxy");
   char** authority_strs = nullptr;
   size_t authority_nstrs;
   if (uri_str == nullptr) return nullptr;
-  grpc_uri* uri =
-      grpc_uri_parse(exec_ctx, uri_str, false /* suppress_errors */);
+  grpc_uri* uri = grpc_uri_parse(uri_str, false /* suppress_errors */);
   if (uri == nullptr || uri->authority == nullptr) {
     gpr_log(GPR_ERROR, "cannot parse value of 'http_proxy' env var");
     goto done;
@@ -82,18 +81,16 @@
   return proxy_name;
 }
 
-static bool proxy_mapper_map_name(grpc_exec_ctx* exec_ctx,
-                                  grpc_proxy_mapper* mapper,
+static bool proxy_mapper_map_name(grpc_proxy_mapper* mapper,
                                   const char* server_uri,
                                   const grpc_channel_args* args,
                                   char** name_to_resolve,
                                   grpc_channel_args** new_args) {
   char* user_cred = nullptr;
-  *name_to_resolve = get_http_proxy_server(exec_ctx, &user_cred);
+  *name_to_resolve = get_http_proxy_server(&user_cred);
   if (*name_to_resolve == nullptr) return false;
   char* no_proxy_str = nullptr;
-  grpc_uri* uri =
-      grpc_uri_parse(exec_ctx, server_uri, false /* suppress_errors */);
+  grpc_uri* uri = grpc_uri_parse(server_uri, false /* suppress_errors */);
   if (uri == nullptr || uri->path[0] == '\0') {
     gpr_log(GPR_ERROR,
             "'http_proxy' environment variable set, but cannot "
@@ -174,8 +171,7 @@
   return false;
 }
 
-static bool proxy_mapper_map_address(grpc_exec_ctx* exec_ctx,
-                                     grpc_proxy_mapper* mapper,
+static bool proxy_mapper_map_address(grpc_proxy_mapper* mapper,
                                      const grpc_resolved_address* address,
                                      const grpc_channel_args* args,
                                      grpc_resolved_address** new_address,
diff --git a/src/core/ext/filters/client_channel/lb_policy.cc b/src/core/ext/filters/client_channel/lb_policy.cc
index 6276c3e..7a5a8de 100644
--- a/src/core/ext/filters/client_channel/lb_policy.cc
+++ b/src/core/ext/filters/client_channel/lb_policy.cc
@@ -63,15 +63,13 @@
   ref_mutate(policy, 1 << WEAK_REF_BITS, 0 REF_MUTATE_PASS_ARGS("STRONG_REF"));
 }
 
-static void shutdown_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void shutdown_locked(void* arg, grpc_error* error) {
   grpc_lb_policy* policy = (grpc_lb_policy*)arg;
-  policy->vtable->shutdown_locked(exec_ctx, policy);
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, policy, "strong-unref");
+  policy->vtable->shutdown_locked(policy);
+  GRPC_LB_POLICY_WEAK_UNREF(policy, "strong-unref");
 }
 
-void grpc_lb_policy_unref(grpc_exec_ctx* exec_ctx,
-                          grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
+void grpc_lb_policy_unref(grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
   gpr_atm old_val =
       ref_mutate(policy, (gpr_atm)1 - (gpr_atm)(1 << WEAK_REF_BITS),
                  1 REF_MUTATE_PASS_ARGS("STRONG_UNREF"));
@@ -79,13 +77,11 @@
   gpr_atm check = 1 << WEAK_REF_BITS;
   if ((old_val & mask) == check) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(shutdown_locked, policy,
                             grpc_combiner_scheduler(policy->combiner)),
         GRPC_ERROR_NONE);
   } else {
-    grpc_lb_policy_weak_unref(exec_ctx,
-                              policy REF_FUNC_PASS_ARGS("strong-unref"));
+    grpc_lb_policy_weak_unref(policy REF_FUNC_PASS_ARGS("strong-unref"));
   }
 }
 
@@ -93,71 +89,86 @@
   ref_mutate(policy, 1, 0 REF_MUTATE_PASS_ARGS("WEAK_REF"));
 }
 
-void grpc_lb_policy_weak_unref(grpc_exec_ctx* exec_ctx,
-                               grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
+void grpc_lb_policy_weak_unref(grpc_lb_policy* policy REF_FUNC_EXTRA_ARGS) {
   gpr_atm old_val =
       ref_mutate(policy, -(gpr_atm)1, 1 REF_MUTATE_PASS_ARGS("WEAK_UNREF"));
   if (old_val == 1) {
-    grpc_pollset_set_destroy(exec_ctx, policy->interested_parties);
+    grpc_pollset_set_destroy(policy->interested_parties);
     grpc_combiner* combiner = policy->combiner;
-    policy->vtable->destroy(exec_ctx, policy);
-    GRPC_COMBINER_UNREF(exec_ctx, combiner, "lb_policy");
+    policy->vtable->destroy(policy);
+    GRPC_COMBINER_UNREF(combiner, "lb_policy");
   }
 }
 
-int grpc_lb_policy_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+int grpc_lb_policy_pick_locked(grpc_lb_policy* policy,
                                const grpc_lb_policy_pick_args* pick_args,
                                grpc_connected_subchannel** target,
                                grpc_call_context_element* context,
                                void** user_data, grpc_closure* on_complete) {
-  return policy->vtable->pick_locked(exec_ctx, policy, pick_args, target,
-                                     context, user_data, on_complete);
+  return policy->vtable->pick_locked(policy, pick_args, target, context,
+                                     user_data, on_complete);
 }
 
-void grpc_lb_policy_cancel_pick_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_lb_policy* policy,
+void grpc_lb_policy_cancel_pick_locked(grpc_lb_policy* policy,
                                        grpc_connected_subchannel** target,
                                        grpc_error* error) {
-  policy->vtable->cancel_pick_locked(exec_ctx, policy, target, error);
+  policy->vtable->cancel_pick_locked(policy, target, error);
 }
 
-void grpc_lb_policy_cancel_picks_locked(grpc_exec_ctx* exec_ctx,
-                                        grpc_lb_policy* policy,
+void grpc_lb_policy_cancel_picks_locked(grpc_lb_policy* policy,
                                         uint32_t initial_metadata_flags_mask,
                                         uint32_t initial_metadata_flags_eq,
                                         grpc_error* error) {
-  policy->vtable->cancel_picks_locked(exec_ctx, policy,
-                                      initial_metadata_flags_mask,
+  policy->vtable->cancel_picks_locked(policy, initial_metadata_flags_mask,
                                       initial_metadata_flags_eq, error);
 }
 
-void grpc_lb_policy_exit_idle_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_lb_policy* policy) {
-  policy->vtable->exit_idle_locked(exec_ctx, policy);
+void grpc_lb_policy_exit_idle_locked(grpc_lb_policy* policy) {
+  policy->vtable->exit_idle_locked(policy);
 }
 
-void grpc_lb_policy_ping_one_locked(grpc_exec_ctx* exec_ctx,
-                                    grpc_lb_policy* policy,
-                                    grpc_closure* closure) {
-  policy->vtable->ping_one_locked(exec_ctx, policy, closure);
+void grpc_lb_policy_ping_one_locked(grpc_lb_policy* policy,
+                                    grpc_closure* on_initiate,
+                                    grpc_closure* on_ack) {
+  policy->vtable->ping_one_locked(policy, on_initiate, on_ack);
 }
 
 void grpc_lb_policy_notify_on_state_change_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_connectivity_state* state, grpc_closure* closure) {
-  policy->vtable->notify_on_state_change_locked(exec_ctx, policy, state,
-                                                closure);
+    grpc_lb_policy* policy, grpc_connectivity_state* state,
+    grpc_closure* closure) {
+  policy->vtable->notify_on_state_change_locked(policy, state, closure);
 }
 
 grpc_connectivity_state grpc_lb_policy_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_error** connectivity_error) {
-  return policy->vtable->check_connectivity_locked(exec_ctx, policy,
-                                                   connectivity_error);
+    grpc_lb_policy* policy, grpc_error** connectivity_error) {
+  return policy->vtable->check_connectivity_locked(policy, connectivity_error);
 }
 
-void grpc_lb_policy_update_locked(grpc_exec_ctx* exec_ctx,
-                                  grpc_lb_policy* policy,
+void grpc_lb_policy_update_locked(grpc_lb_policy* policy,
                                   const grpc_lb_policy_args* lb_policy_args) {
-  policy->vtable->update_locked(exec_ctx, policy, lb_policy_args);
+  policy->vtable->update_locked(policy, lb_policy_args);
+}
+
+void grpc_lb_policy_set_reresolve_closure_locked(
+    grpc_lb_policy* policy, grpc_closure* request_reresolution) {
+  policy->vtable->set_reresolve_closure_locked(policy, request_reresolution);
+}
+
+void grpc_lb_policy_try_reresolve(grpc_lb_policy* policy,
+                                  grpc_core::TraceFlag* grpc_lb_trace,
+                                  grpc_error* error) {
+  if (policy->request_reresolution != nullptr) {
+    GRPC_CLOSURE_SCHED(policy->request_reresolution, error);
+    policy->request_reresolution = nullptr;
+    if (grpc_lb_trace->enabled()) {
+      gpr_log(GPR_DEBUG,
+              "%s %p: scheduling re-resolution closure with error=%s.",
+              grpc_lb_trace->name(), policy, grpc_error_string(error));
+    }
+  } else {
+    if (grpc_lb_trace->enabled() && error == GRPC_ERROR_NONE) {
+      gpr_log(GPR_DEBUG, "%s %p: re-resolution already in progress.",
+              grpc_lb_trace->name(), policy);
+    }
+  }
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy.h b/src/core/ext/filters/client_channel/lb_policy.h
index 72d0279..3572c97 100644
--- a/src/core/ext/filters/client_channel/lb_policy.h
+++ b/src/core/ext/filters/client_channel/lb_policy.h
@@ -38,6 +38,8 @@
   grpc_pollset_set* interested_parties;
   /* combiner under which lb_policy actions take place */
   grpc_combiner* combiner;
+  /* callback to force a re-resolution */
+  grpc_closure* request_reresolution;
 };
 
 /** Extra arguments for an LB pick */
@@ -53,49 +55,51 @@
 } grpc_lb_policy_pick_args;
 
 struct grpc_lb_policy_vtable {
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
-  void (*shutdown_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
+  void (*destroy)(grpc_lb_policy* policy);
+  void (*shutdown_locked)(grpc_lb_policy* policy);
 
   /** \see grpc_lb_policy_pick */
-  int (*pick_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+  int (*pick_locked)(grpc_lb_policy* policy,
                      const grpc_lb_policy_pick_args* pick_args,
                      grpc_connected_subchannel** target,
                      grpc_call_context_element* context, void** user_data,
                      grpc_closure* on_complete);
 
   /** \see grpc_lb_policy_cancel_pick */
-  void (*cancel_pick_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+  void (*cancel_pick_locked)(grpc_lb_policy* policy,
                              grpc_connected_subchannel** target,
                              grpc_error* error);
 
   /** \see grpc_lb_policy_cancel_picks */
-  void (*cancel_picks_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+  void (*cancel_picks_locked)(grpc_lb_policy* policy,
                               uint32_t initial_metadata_flags_mask,
                               uint32_t initial_metadata_flags_eq,
                               grpc_error* error);
 
   /** \see grpc_lb_policy_ping_one */
-  void (*ping_one_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-                          grpc_closure* closure);
+  void (*ping_one_locked)(grpc_lb_policy* policy, grpc_closure* on_initiate,
+                          grpc_closure* on_ack);
 
   /** Try to enter a READY connectivity state */
-  void (*exit_idle_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
+  void (*exit_idle_locked)(grpc_lb_policy* policy);
 
   /** check the current connectivity of the lb_policy */
   grpc_connectivity_state (*check_connectivity_locked)(
-      grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-      grpc_error** connectivity_error);
+      grpc_lb_policy* policy, grpc_error** connectivity_error);
 
   /** call notify when the connectivity state of a channel changes from *state.
       Updates *state with the new state of the policy. Calling with a NULL \a
       state cancels the subscription.  */
-  void (*notify_on_state_change_locked)(grpc_exec_ctx* exec_ctx,
-                                        grpc_lb_policy* policy,
+  void (*notify_on_state_change_locked)(grpc_lb_policy* policy,
                                         grpc_connectivity_state* state,
                                         grpc_closure* closure);
 
-  void (*update_locked)(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+  void (*update_locked)(grpc_lb_policy* policy,
                         const grpc_lb_policy_args* args);
+
+  /** \see grpc_lb_policy_set_reresolve_closure */
+  void (*set_reresolve_closure_locked)(grpc_lb_policy* policy,
+                                       grpc_closure* request_reresolution);
 };
 
 #ifndef NDEBUG
@@ -103,33 +107,33 @@
 /* Strong references: the policy will shutdown when they reach zero */
 #define GRPC_LB_POLICY_REF(p, r) \
   grpc_lb_policy_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_LB_POLICY_UNREF(exec_ctx, p, r) \
-  grpc_lb_policy_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
+#define GRPC_LB_POLICY_UNREF(p, r) \
+  grpc_lb_policy_unref((p), __FILE__, __LINE__, (r))
 
 /* Weak references: they don't prevent the shutdown of the LB policy. When no
  * strong references are left but there are still weak ones, shutdown is called.
  * Once the weak reference also reaches zero, the LB policy is destroyed. */
 #define GRPC_LB_POLICY_WEAK_REF(p, r) \
   grpc_lb_policy_weak_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, p, r) \
-  grpc_lb_policy_weak_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
+#define GRPC_LB_POLICY_WEAK_UNREF(p, r) \
+  grpc_lb_policy_weak_unref((p), __FILE__, __LINE__, (r))
 void grpc_lb_policy_ref(grpc_lb_policy* policy, const char* file, int line,
                         const char* reason);
-void grpc_lb_policy_unref(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-                          const char* file, int line, const char* reason);
+void grpc_lb_policy_unref(grpc_lb_policy* policy, const char* file, int line,
+                          const char* reason);
 void grpc_lb_policy_weak_ref(grpc_lb_policy* policy, const char* file, int line,
                              const char* reason);
-void grpc_lb_policy_weak_unref(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-                               const char* file, int line, const char* reason);
+void grpc_lb_policy_weak_unref(grpc_lb_policy* policy, const char* file,
+                               int line, const char* reason);
 #else
 #define GRPC_LB_POLICY_REF(p, r) grpc_lb_policy_ref((p))
-#define GRPC_LB_POLICY_UNREF(cl, p, r) grpc_lb_policy_unref((cl), (p))
+#define GRPC_LB_POLICY_UNREF(p, r) grpc_lb_policy_unref((p))
 #define GRPC_LB_POLICY_WEAK_REF(p, r) grpc_lb_policy_weak_ref((p))
-#define GRPC_LB_POLICY_WEAK_UNREF(cl, p, r) grpc_lb_policy_weak_unref((cl), (p))
+#define GRPC_LB_POLICY_WEAK_UNREF(p, r) grpc_lb_policy_weak_unref((p))
 void grpc_lb_policy_ref(grpc_lb_policy* policy);
-void grpc_lb_policy_unref(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
+void grpc_lb_policy_unref(grpc_lb_policy* policy);
 void grpc_lb_policy_weak_ref(grpc_lb_policy* policy);
-void grpc_lb_policy_weak_unref(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy);
+void grpc_lb_policy_weak_unref(grpc_lb_policy* policy);
 #endif
 
 /** called by concrete implementations to initialize the base struct */
@@ -154,7 +158,7 @@
 
     Any IO should be done under the \a interested_parties \a grpc_pollset_set
     in the \a grpc_lb_policy struct. */
-int grpc_lb_policy_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+int grpc_lb_policy_pick_locked(grpc_lb_policy* policy,
                                const grpc_lb_policy_pick_args* pick_args,
                                grpc_connected_subchannel** target,
                                grpc_call_context_element* context,
@@ -162,44 +166,49 @@
 
 /** Perform a connected subchannel ping (see \a grpc_connected_subchannel_ping)
     against one of the connected subchannels managed by \a policy. */
-void grpc_lb_policy_ping_one_locked(grpc_exec_ctx* exec_ctx,
-                                    grpc_lb_policy* policy,
-                                    grpc_closure* closure);
+void grpc_lb_policy_ping_one_locked(grpc_lb_policy* policy,
+                                    grpc_closure* on_initiate,
+                                    grpc_closure* on_ack);
 
 /** Cancel picks for \a target.
     The \a on_complete callback of the pending picks will be invoked with \a
     *target set to NULL. */
-void grpc_lb_policy_cancel_pick_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_lb_policy* policy,
+void grpc_lb_policy_cancel_pick_locked(grpc_lb_policy* policy,
                                        grpc_connected_subchannel** target,
                                        grpc_error* error);
 
 /** Cancel all pending picks for which their \a initial_metadata_flags (as given
     in the call to \a grpc_lb_policy_pick) matches \a initial_metadata_flags_eq
     when AND'd with \a initial_metadata_flags_mask */
-void grpc_lb_policy_cancel_picks_locked(grpc_exec_ctx* exec_ctx,
-                                        grpc_lb_policy* policy,
+void grpc_lb_policy_cancel_picks_locked(grpc_lb_policy* policy,
                                         uint32_t initial_metadata_flags_mask,
                                         uint32_t initial_metadata_flags_eq,
                                         grpc_error* error);
 
 /** Try to enter a READY connectivity state */
-void grpc_lb_policy_exit_idle_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_lb_policy* policy);
+void grpc_lb_policy_exit_idle_locked(grpc_lb_policy* policy);
 
 /* Call notify when the connectivity state of a channel changes from \a *state.
  * Updates \a *state with the new state of the policy */
 void grpc_lb_policy_notify_on_state_change_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_connectivity_state* state, grpc_closure* closure);
+    grpc_lb_policy* policy, grpc_connectivity_state* state,
+    grpc_closure* closure);
 
 grpc_connectivity_state grpc_lb_policy_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
-    grpc_error** connectivity_error);
+    grpc_lb_policy* policy, grpc_error** connectivity_error);
 
 /** Update \a policy with \a lb_policy_args. */
-void grpc_lb_policy_update_locked(grpc_exec_ctx* exec_ctx,
-                                  grpc_lb_policy* policy,
+void grpc_lb_policy_update_locked(grpc_lb_policy* policy,
                                   const grpc_lb_policy_args* lb_policy_args);
 
+/** Set the re-resolution closure to \a request_reresolution. */
+void grpc_lb_policy_set_reresolve_closure_locked(
+    grpc_lb_policy* policy, grpc_closure* request_reresolution);
+
+/** Try to request a re-resolution. It's NOT a public API; it's only for use by
+    the LB policy implementations. */
+void grpc_lb_policy_try_reresolve(grpc_lb_policy* policy,
+                                  grpc_core::TraceFlag* grpc_lb_trace,
+                                  grpc_error* error);
+
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_H */
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
index 6d9fada..3eedb08 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
@@ -25,14 +25,12 @@
 #include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/profiling/timers.h"
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 typedef struct {
   // Stats object to update.
@@ -47,28 +45,24 @@
   bool recv_initial_metadata_succeeded;
 } call_data;
 
-static void on_complete_for_send(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_complete_for_send(void* arg, grpc_error* error) {
   call_data* calld = (call_data*)arg;
   if (error == GRPC_ERROR_NONE) {
     calld->send_initial_metadata_succeeded = true;
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_on_complete_for_send,
-                   GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(calld->original_on_complete_for_send, GRPC_ERROR_REF(error));
 }
 
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
   call_data* calld = (call_data*)arg;
   if (error == GRPC_ERROR_NONE) {
     calld->recv_initial_metadata_succeeded = true;
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_recv_initial_metadata_ready,
+  GRPC_CLOSURE_RUN(calld->original_recv_initial_metadata_ready,
                    GRPC_ERROR_REF(error));
 }
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   // Get stats object from context and take a ref.
@@ -81,7 +75,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
@@ -96,8 +90,7 @@
 }
 
 static void start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   GPR_TIMER_BEGIN("clr_start_transport_stream_op_batch", 0);
   // Intercept send_initial_metadata.
@@ -118,7 +111,7 @@
         &calld->recv_initial_metadata_ready;
   }
   // Chain to next filter.
-  grpc_call_next_op(exec_ctx, elem, batch);
+  grpc_call_next_op(elem, batch);
   GPR_TIMER_END("clr_start_transport_stream_op_batch", 0);
 }
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
index 2f8e0c9..3c64213 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
@@ -131,12 +131,12 @@
 /* add lb_token of selected subchannel (address) to the call's initial
  * metadata */
 static grpc_error* initial_metadata_add_lb_token(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* initial_metadata,
+    grpc_metadata_batch* initial_metadata,
     grpc_linked_mdelem* lb_token_mdelem_storage, grpc_mdelem lb_token) {
   GPR_ASSERT(lb_token_mdelem_storage != nullptr);
   GPR_ASSERT(!GRPC_MDISNULL(lb_token));
-  return grpc_metadata_batch_add_tail(exec_ctx, initial_metadata,
-                                      lb_token_mdelem_storage, lb_token);
+  return grpc_metadata_batch_add_tail(initial_metadata, lb_token_mdelem_storage,
+                                      lb_token);
 }
 
 static void destroy_client_stats(void* arg) {
@@ -186,20 +186,19 @@
 /* The \a on_complete closure passed as part of the pick requires keeping a
  * reference to its associated round robin instance. We wrap this closure in
  * order to unref the round robin instance upon its invocation */
-static void wrapped_rr_closure(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void wrapped_rr_closure(void* arg, grpc_error* error) {
   wrapped_rr_closure_arg* wc_arg = (wrapped_rr_closure_arg*)arg;
 
   GPR_ASSERT(wc_arg->wrapped_closure != nullptr);
-  GRPC_CLOSURE_SCHED(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(wc_arg->wrapped_closure, GRPC_ERROR_REF(error));
 
   if (wc_arg->rr_policy != nullptr) {
-    /* if *target is NULL, no pick has been made by the RR policy (eg, all
+    /* if *target is nullptr, no pick has been made by the RR policy (eg, all
      * addresses failed to connect). There won't be any user_data/token
      * available */
     if (*wc_arg->target != nullptr) {
       if (!GRPC_MDISNULL(wc_arg->lb_token)) {
-        initial_metadata_add_lb_token(exec_ctx, wc_arg->initial_metadata,
+        initial_metadata_add_lb_token(wc_arg->initial_metadata,
                                       wc_arg->lb_token_mdelem_storage,
                                       GRPC_MDELEM_REF(wc_arg->lb_token));
       } else {
@@ -221,7 +220,7 @@
       gpr_log(GPR_INFO, "[grpclb %p] Unreffing RR %p", wc_arg->glb_policy,
               wc_arg->rr_policy);
     }
-    GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "wrapped_rr_closure");
+    GRPC_LB_POLICY_UNREF(wc_arg->rr_policy, "wrapped_rr_closure");
   }
   GPR_ASSERT(wc_arg->free_when_done != nullptr);
   gpr_free(wc_arg->free_when_done);
@@ -241,8 +240,8 @@
   /* original pick()'s arguments */
   grpc_lb_policy_pick_args pick_args;
 
-  /* output argument where to store the pick()ed connected subchannel, or NULL
-   * upon error. */
+  /* output argument where to store the pick()ed connected subchannel, or
+   * nullptr upon error. */
   grpc_connected_subchannel** target;
 
   /* args for wrapped_on_complete */
@@ -275,18 +274,30 @@
 typedef struct pending_ping {
   struct pending_ping* next;
 
-  /* args for wrapped_notify */
-  wrapped_rr_closure_arg wrapped_notify_arg;
+  /* args for sending the ping */
+  wrapped_rr_closure_arg* on_initiate;
+  wrapped_rr_closure_arg* on_ack;
 } pending_ping;
 
-static void add_pending_ping(pending_ping** root, grpc_closure* notify) {
+static void add_pending_ping(pending_ping** root, grpc_closure* on_initiate,
+                             grpc_closure* on_ack) {
   pending_ping* pping = (pending_ping*)gpr_zalloc(sizeof(*pping));
-  pping->wrapped_notify_arg.wrapped_closure = notify;
-  pping->wrapped_notify_arg.free_when_done = pping;
+  if (on_initiate != nullptr) {
+    pping->on_initiate =
+        (wrapped_rr_closure_arg*)gpr_zalloc(sizeof(*pping->on_initiate));
+    pping->on_initiate->wrapped_closure = on_initiate;
+    pping->on_initiate->free_when_done = pping->on_initiate;
+    GRPC_CLOSURE_INIT(&pping->on_initiate->wrapper_closure, wrapped_rr_closure,
+                      &pping->on_initiate, grpc_schedule_on_exec_ctx);
+  }
+  if (on_ack != nullptr) {
+    pping->on_ack = (wrapped_rr_closure_arg*)gpr_zalloc(sizeof(*pping->on_ack));
+    pping->on_ack->wrapped_closure = on_ack;
+    pping->on_ack->free_when_done = pping->on_ack;
+    GRPC_CLOSURE_INIT(&pping->on_ack->wrapper_closure, wrapped_rr_closure,
+                      &pping->on_ack, grpc_schedule_on_exec_ctx);
+  }
   pping->next = *root;
-  GRPC_CLOSURE_INIT(&pping->wrapped_notify_arg.wrapper_closure,
-                    wrapped_rr_closure, &pping->wrapped_notify_arg,
-                    grpc_schedule_on_exec_ctx);
   *root = pping;
 }
 
@@ -328,8 +339,8 @@
   /** connectivity state of the LB channel */
   grpc_connectivity_state lb_channel_connectivity;
 
-  /** stores the deserialized response from the LB. May be NULL until one such
-   * response has arrived. */
+  /** stores the deserialized response from the LB. May be nullptr until one
+   * such response has arrived. */
   grpc_grpclb_serverlist* serverlist;
 
   /** Index into serverlist for next pick.
@@ -459,9 +470,9 @@
              ? nullptr
              : (void*)GRPC_MDELEM_REF(grpc_mdelem{(uintptr_t)token}).payload;
 }
-static void lb_token_destroy(grpc_exec_ctx* exec_ctx, void* token) {
+static void lb_token_destroy(void* token) {
   if (token != nullptr) {
-    GRPC_MDELEM_UNREF(exec_ctx, grpc_mdelem{(uintptr_t)token});
+    GRPC_MDELEM_UNREF(grpc_mdelem{(uintptr_t)token});
   }
 }
 static int lb_token_cmp(void* token1, void* token2) {
@@ -497,7 +508,7 @@
 
 /* Returns addresses extracted from \a serverlist. */
 static grpc_lb_addresses* process_serverlist_locked(
-    grpc_exec_ctx* exec_ctx, const grpc_grpclb_serverlist* serverlist) {
+    const grpc_grpclb_serverlist* serverlist) {
   size_t num_valid = 0;
   /* first pass: count how many are valid in order to allocate the necessary
    * memory in a single block */
@@ -528,9 +539,9 @@
           strnlen(server->load_balance_token, lb_token_max_length);
       grpc_slice lb_token_mdstr = grpc_slice_from_copied_buffer(
           server->load_balance_token, lb_token_length);
-      user_data = (void*)grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_LB_TOKEN,
-                                                 lb_token_mdstr)
-                      .payload;
+      user_data =
+          (void*)grpc_mdelem_from_slices(GRPC_MDSTR_LB_TOKEN, lb_token_mdstr)
+              .payload;
     } else {
       char* uri = grpc_sockaddr_to_uri(&addr);
       gpr_log(GPR_INFO,
@@ -552,7 +563,7 @@
 
 /* Returns the backend addresses extracted from the given addresses */
 static grpc_lb_addresses* extract_backend_addresses_locked(
-    grpc_exec_ctx* exec_ctx, const grpc_lb_addresses* addresses) {
+    const grpc_lb_addresses* addresses) {
   /* first pass: count the number of backend addresses */
   size_t num_backends = 0;
   for (size_t i = 0; i < addresses->num_addresses; ++i) {
@@ -577,8 +588,8 @@
 }
 
 static void update_lb_connectivity_status_locked(
-    grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
-    grpc_connectivity_state rr_state, grpc_error* rr_state_error) {
+    glb_lb_policy* glb_policy, grpc_connectivity_state rr_state,
+    grpc_error* rr_state_error) {
   const grpc_connectivity_state curr_glb_state =
       grpc_connectivity_state_check(&glb_policy->state_tracker);
 
@@ -630,20 +641,20 @@
         glb_policy, grpc_connectivity_state_name(rr_state),
         glb_policy->rr_policy);
   }
-  grpc_connectivity_state_set(exec_ctx, &glb_policy->state_tracker, rr_state,
+  grpc_connectivity_state_set(&glb_policy->state_tracker, rr_state,
                               rr_state_error,
                               "update_lb_connectivity_status_locked");
 }
 
 /* Perform a pick over \a glb_policy->rr_policy. Given that a pick can return
  * immediately (ignoring its completion callback), we need to perform the
- * cleanups this callback would otherwise be resposible for.
+ * cleanups this callback would otherwise be responsible for.
  * If \a force_async is true, then we will manually schedule the
  * completion callback even if the pick is available immediately. */
 static bool pick_from_internal_rr_locked(
-    grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
-    const grpc_lb_policy_pick_args* pick_args, bool force_async,
-    grpc_connected_subchannel** target, wrapped_rr_closure_arg* wc_arg) {
+    glb_lb_policy* glb_policy, const grpc_lb_policy_pick_args* pick_args,
+    bool force_async, grpc_connected_subchannel** target,
+    wrapped_rr_closure_arg* wc_arg) {
   // Check for drops if we are not using fallback backend addresses.
   if (glb_policy->serverlist != nullptr) {
     // Look at the index into the serverlist to see if we should drop this call.
@@ -658,7 +669,7 @@
         gpr_log(GPR_INFO, "[grpclb %p] Unreffing RR %p for drop", glb_policy,
                 wc_arg->rr_policy);
       }
-      GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "glb_pick_sync");
+      GRPC_LB_POLICY_UNREF(wc_arg->rr_policy, "glb_pick_sync");
       // Update client load reporting stats to indicate the number of
       // dropped calls.  Note that we have to do this here instead of in
       // the client_load_reporting filter, because we do not create a
@@ -670,7 +681,7 @@
       grpc_grpclb_client_stats_unref(wc_arg->client_stats);
       if (force_async) {
         GPR_ASSERT(wc_arg->wrapped_closure != nullptr);
-        GRPC_CLOSURE_SCHED(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(wc_arg->wrapped_closure, GRPC_ERROR_NONE);
         gpr_free(wc_arg->free_when_done);
         return false;
       }
@@ -680,7 +691,7 @@
   }
   // Pick via the RR policy.
   const bool pick_done = grpc_lb_policy_pick_locked(
-      exec_ctx, wc_arg->rr_policy, pick_args, target, wc_arg->context,
+      wc_arg->rr_policy, pick_args, target, wc_arg->context,
       (void**)&wc_arg->lb_token, &wc_arg->wrapper_closure);
   if (pick_done) {
     /* synchronous grpc_lb_policy_pick call. Unref the RR policy. */
@@ -688,9 +699,9 @@
       gpr_log(GPR_INFO, "[grpclb %p] Unreffing RR %p", glb_policy,
               wc_arg->rr_policy);
     }
-    GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "glb_pick_sync");
+    GRPC_LB_POLICY_UNREF(wc_arg->rr_policy, "glb_pick_sync");
     /* add the load reporting initial metadata */
-    initial_metadata_add_lb_token(exec_ctx, pick_args->initial_metadata,
+    initial_metadata_add_lb_token(pick_args->initial_metadata,
                                   pick_args->lb_token_mdelem_storage,
                                   GRPC_MDELEM_REF(wc_arg->lb_token));
     // Pass on client stats via context. Passes ownership of the reference.
@@ -699,7 +710,7 @@
     wc_arg->context[GRPC_GRPCLB_CLIENT_STATS].destroy = destroy_client_stats;
     if (force_async) {
       GPR_ASSERT(wc_arg->wrapped_closure != nullptr);
-      GRPC_CLOSURE_SCHED(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(wc_arg->wrapped_closure, GRPC_ERROR_NONE);
       gpr_free(wc_arg->free_when_done);
       return false;
     }
@@ -712,12 +723,11 @@
   return pick_done;
 }
 
-static grpc_lb_policy_args* lb_policy_args_create(grpc_exec_ctx* exec_ctx,
-                                                  glb_lb_policy* glb_policy) {
+static grpc_lb_policy_args* lb_policy_args_create(glb_lb_policy* glb_policy) {
   grpc_lb_addresses* addresses;
   if (glb_policy->serverlist != nullptr) {
     GPR_ASSERT(glb_policy->serverlist->num_servers > 0);
-    addresses = process_serverlist_locked(exec_ctx, glb_policy->serverlist);
+    addresses = process_serverlist_locked(glb_policy->serverlist);
   } else {
     // If rr_handover_locked() is invoked when we haven't received any
     // serverlist from the balancer, we use the fallback backends returned by
@@ -737,24 +747,21 @@
   args->args = grpc_channel_args_copy_and_add_and_remove(
       glb_policy->args, keys_to_remove, GPR_ARRAY_SIZE(keys_to_remove), &arg,
       1);
-  grpc_lb_addresses_destroy(exec_ctx, addresses);
+  grpc_lb_addresses_destroy(addresses);
   return args;
 }
 
-static void lb_policy_args_destroy(grpc_exec_ctx* exec_ctx,
-                                   grpc_lb_policy_args* args) {
-  grpc_channel_args_destroy(exec_ctx, args->args);
+static void lb_policy_args_destroy(grpc_lb_policy_args* args) {
+  grpc_channel_args_destroy(args->args);
   gpr_free(args);
 }
 
-static void glb_rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx,
-                                               void* arg, grpc_error* error);
-static void create_rr_locked(grpc_exec_ctx* exec_ctx, glb_lb_policy* glb_policy,
+static void glb_rr_connectivity_changed_locked(void* arg, grpc_error* error);
+static void create_rr_locked(glb_lb_policy* glb_policy,
                              grpc_lb_policy_args* args) {
   GPR_ASSERT(glb_policy->rr_policy == nullptr);
 
-  grpc_lb_policy* new_rr_policy =
-      grpc_lb_policy_create(exec_ctx, "round_robin", args);
+  grpc_lb_policy* new_rr_policy = grpc_lb_policy_create("round_robin", args);
   if (new_rr_policy == nullptr) {
     gpr_log(GPR_ERROR,
             "[grpclb %p] Failure creating a RoundRobin policy for serverlist "
@@ -766,19 +773,20 @@
             glb_policy->rr_policy);
     return;
   }
+  grpc_lb_policy_set_reresolve_closure_locked(
+      new_rr_policy, glb_policy->base.request_reresolution);
+  glb_policy->base.request_reresolution = nullptr;
   glb_policy->rr_policy = new_rr_policy;
   grpc_error* rr_state_error = nullptr;
   const grpc_connectivity_state rr_state =
-      grpc_lb_policy_check_connectivity_locked(exec_ctx, glb_policy->rr_policy,
+      grpc_lb_policy_check_connectivity_locked(glb_policy->rr_policy,
                                                &rr_state_error);
   /* Connectivity state is a function of the RR policy updated/created */
-  update_lb_connectivity_status_locked(exec_ctx, glb_policy, rr_state,
-                                       rr_state_error);
+  update_lb_connectivity_status_locked(glb_policy, rr_state, rr_state_error);
   /* Add the gRPC LB's interested_parties pollset_set to that of the newly
    * created RR policy. This will make the RR policy progress upon activity on
    * gRPC LB, which in turn is tied to the application's call */
-  grpc_pollset_set_add_pollset_set(exec_ctx,
-                                   glb_policy->rr_policy->interested_parties,
+  grpc_pollset_set_add_pollset_set(glb_policy->rr_policy->interested_parties,
                                    glb_policy->base.interested_parties);
 
   /* Allocate the data for the tracking of the new RR policy's connectivity.
@@ -793,10 +801,10 @@
 
   /* Subscribe to changes to the connectivity of the new RR */
   GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "glb_rr_connectivity_cb");
-  grpc_lb_policy_notify_on_state_change_locked(exec_ctx, glb_policy->rr_policy,
+  grpc_lb_policy_notify_on_state_change_locked(glb_policy->rr_policy,
                                                &rr_connectivity->state,
                                                &rr_connectivity->on_change);
-  grpc_lb_policy_exit_idle_locked(exec_ctx, glb_policy->rr_policy);
+  grpc_lb_policy_exit_idle_locked(glb_policy->rr_policy);
 
   /* Update picks and pings in wait */
   pending_pick* pp;
@@ -811,7 +819,7 @@
               "[grpclb %p] Pending pick about to (async) PICK from RR %p",
               glb_policy, glb_policy->rr_policy);
     }
-    pick_from_internal_rr_locked(exec_ctx, glb_policy, &pp->pick_args,
+    pick_from_internal_rr_locked(glb_policy, &pp->pick_args,
                                  true /* force_async */, pp->target,
                                  &pp->wrapped_on_complete_arg);
   }
@@ -819,46 +827,53 @@
   pending_ping* pping;
   while ((pping = glb_policy->pending_pings)) {
     glb_policy->pending_pings = pping->next;
-    GRPC_LB_POLICY_REF(glb_policy->rr_policy, "rr_handover_pending_ping");
-    pping->wrapped_notify_arg.rr_policy = glb_policy->rr_policy;
+    grpc_closure* on_initiate = nullptr;
+    grpc_closure* on_ack = nullptr;
+    if (pping->on_initiate != nullptr) {
+      GRPC_LB_POLICY_REF(glb_policy->rr_policy, "rr_handover_pending_ping");
+      pping->on_initiate->rr_policy = glb_policy->rr_policy;
+      on_initiate = &pping->on_initiate->wrapper_closure;
+    }
+    if (pping->on_ack != nullptr) {
+      GRPC_LB_POLICY_REF(glb_policy->rr_policy, "rr_handover_pending_ping");
+      pping->on_ack->rr_policy = glb_policy->rr_policy;
+      on_ack = &pping->on_ack->wrapper_closure;
+    }
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_INFO, "[grpclb %p] Pending ping about to PING from RR %p",
               glb_policy, glb_policy->rr_policy);
     }
-    grpc_lb_policy_ping_one_locked(exec_ctx, glb_policy->rr_policy,
-                                   &pping->wrapped_notify_arg.wrapper_closure);
+    grpc_lb_policy_ping_one_locked(glb_policy->rr_policy, on_initiate, on_ack);
+    gpr_free(pping);
   }
 }
 
-/* glb_policy->rr_policy may be NULL (initial handover) */
-static void rr_handover_locked(grpc_exec_ctx* exec_ctx,
-                               glb_lb_policy* glb_policy) {
+/* glb_policy->rr_policy may be nullptr (initial handover) */
+static void rr_handover_locked(glb_lb_policy* glb_policy) {
   if (glb_policy->shutting_down) return;
-  grpc_lb_policy_args* args = lb_policy_args_create(exec_ctx, glb_policy);
+  grpc_lb_policy_args* args = lb_policy_args_create(glb_policy);
   GPR_ASSERT(args != nullptr);
   if (glb_policy->rr_policy != nullptr) {
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_DEBUG, "[grpclb %p] Updating RR policy %p", glb_policy,
               glb_policy->rr_policy);
     }
-    grpc_lb_policy_update_locked(exec_ctx, glb_policy->rr_policy, args);
+    grpc_lb_policy_update_locked(glb_policy->rr_policy, args);
   } else {
-    create_rr_locked(exec_ctx, glb_policy, args);
+    create_rr_locked(glb_policy, args);
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_DEBUG, "[grpclb %p] Created new RR policy %p", glb_policy,
               glb_policy->rr_policy);
     }
   }
-  lb_policy_args_destroy(exec_ctx, args);
+  lb_policy_args_destroy(args);
 }
 
-static void glb_rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx,
-                                               void* arg, grpc_error* error) {
+static void glb_rr_connectivity_changed_locked(void* arg, grpc_error* error) {
   rr_connectivity_data* rr_connectivity = (rr_connectivity_data*)arg;
   glb_lb_policy* glb_policy = rr_connectivity->glb_policy;
   if (glb_policy->shutting_down) {
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                              "glb_rr_connectivity_cb");
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "glb_rr_connectivity_cb");
     gpr_free(rr_connectivity);
     return;
   }
@@ -866,25 +881,22 @@
     /* An RR policy that has transitioned into the SHUTDOWN connectivity state
      * should not be considered for picks or updates: the SHUTDOWN state is a
      * sink, policies can't transition back from it. .*/
-    GRPC_LB_POLICY_UNREF(exec_ctx, glb_policy->rr_policy,
-                         "rr_connectivity_shutdown");
+    GRPC_LB_POLICY_UNREF(glb_policy->rr_policy, "rr_connectivity_shutdown");
     glb_policy->rr_policy = nullptr;
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                              "glb_rr_connectivity_cb");
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "glb_rr_connectivity_cb");
     gpr_free(rr_connectivity);
     return;
   }
   /* rr state != SHUTDOWN && !glb_policy->shutting down: biz as usual */
-  update_lb_connectivity_status_locked(
-      exec_ctx, glb_policy, rr_connectivity->state, GRPC_ERROR_REF(error));
+  update_lb_connectivity_status_locked(glb_policy, rr_connectivity->state,
+                                       GRPC_ERROR_REF(error));
   /* Resubscribe. Reuse the "glb_rr_connectivity_cb" weak ref. */
-  grpc_lb_policy_notify_on_state_change_locked(exec_ctx, glb_policy->rr_policy,
+  grpc_lb_policy_notify_on_state_change_locked(glb_policy->rr_policy,
                                                &rr_connectivity->state,
                                                &rr_connectivity->on_change);
 }
 
-static void destroy_balancer_name(grpc_exec_ctx* exec_ctx,
-                                  void* balancer_name) {
+static void destroy_balancer_name(void* balancer_name) {
   gpr_free(balancer_name);
 }
 
@@ -911,7 +923,7 @@
  *   above the grpclb policy.
  *   - \a args: other args inherited from the grpclb policy. */
 static grpc_channel_args* build_lb_channel_args(
-    grpc_exec_ctx* exec_ctx, const grpc_lb_addresses* addresses,
+    const grpc_lb_addresses* addresses,
     grpc_fake_resolver_response_generator* response_generator,
     const grpc_channel_args* args) {
   size_t num_grpclb_addrs = 0;
@@ -954,7 +966,7 @@
   gpr_free(targets_info_entries);
 
   grpc_channel_args* lb_channel_args =
-      grpc_lb_policy_grpclb_build_lb_channel_args(exec_ctx, targets_info,
+      grpc_lb_policy_grpclb_build_lb_channel_args(targets_info,
                                                   response_generator, args);
 
   grpc_arg lb_channel_addresses_arg =
@@ -962,35 +974,36 @@
 
   grpc_channel_args* result = grpc_channel_args_copy_and_add(
       lb_channel_args, &lb_channel_addresses_arg, 1);
-  grpc_slice_hash_table_unref(exec_ctx, targets_info);
-  grpc_channel_args_destroy(exec_ctx, lb_channel_args);
-  grpc_lb_addresses_destroy(exec_ctx, lb_addresses);
+  grpc_slice_hash_table_unref(targets_info);
+  grpc_channel_args_destroy(lb_channel_args);
+  grpc_lb_addresses_destroy(lb_addresses);
   return result;
 }
 
-static void glb_destroy(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void glb_destroy(grpc_lb_policy* pol) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   GPR_ASSERT(glb_policy->pending_picks == nullptr);
   GPR_ASSERT(glb_policy->pending_pings == nullptr);
   gpr_free((void*)glb_policy->server_name);
-  grpc_channel_args_destroy(exec_ctx, glb_policy->args);
+  grpc_channel_args_destroy(glb_policy->args);
   if (glb_policy->client_stats != nullptr) {
     grpc_grpclb_client_stats_unref(glb_policy->client_stats);
   }
-  grpc_connectivity_state_destroy(exec_ctx, &glb_policy->state_tracker);
+  grpc_connectivity_state_destroy(&glb_policy->state_tracker);
   if (glb_policy->serverlist != nullptr) {
     grpc_grpclb_destroy_serverlist(glb_policy->serverlist);
   }
   if (glb_policy->fallback_backend_addresses != nullptr) {
-    grpc_lb_addresses_destroy(exec_ctx, glb_policy->fallback_backend_addresses);
+    grpc_lb_addresses_destroy(glb_policy->fallback_backend_addresses);
   }
   grpc_fake_resolver_response_generator_unref(glb_policy->response_generator);
   grpc_subchannel_index_unref();
   gpr_free(glb_policy);
 }
 
-static void glb_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void glb_shutdown_locked(grpc_lb_policy* pol) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   glb_policy->shutting_down = true;
 
   /* We need a copy of the lb_call pointer because we can't cancell the call
@@ -1007,11 +1020,11 @@
     /* lb_on_server_status_received will pick up the cancel and clean up */
   }
   if (glb_policy->retry_timer_active) {
-    grpc_timer_cancel(exec_ctx, &glb_policy->lb_call_retry_timer);
+    grpc_timer_cancel(&glb_policy->lb_call_retry_timer);
     glb_policy->retry_timer_active = false;
   }
   if (glb_policy->fallback_timer_active) {
-    grpc_timer_cancel(exec_ctx, &glb_policy->lb_fallback_timer);
+    grpc_timer_cancel(&glb_policy->lb_fallback_timer);
     glb_policy->fallback_timer_active = false;
   }
 
@@ -1020,7 +1033,9 @@
   pending_ping* pping = glb_policy->pending_pings;
   glb_policy->pending_pings = nullptr;
   if (glb_policy->rr_policy != nullptr) {
-    GRPC_LB_POLICY_UNREF(exec_ctx, glb_policy->rr_policy, "glb_shutdown");
+    GRPC_LB_POLICY_UNREF(glb_policy->rr_policy, "glb_shutdown");
+  } else {
+    grpc_lb_policy_try_reresolve(pol, &grpc_lb_glb_trace, GRPC_ERROR_CANCELLED);
   }
   // We destroy the LB channel here because
   // glb_lb_channel_on_connectivity_changed_cb needs a valid glb_policy
@@ -1030,28 +1045,34 @@
     grpc_channel_destroy(glb_policy->lb_channel);
     glb_policy->lb_channel = nullptr;
   }
-  grpc_connectivity_state_set(
-      exec_ctx, &glb_policy->state_tracker, GRPC_CHANNEL_SHUTDOWN,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel Shutdown"), "glb_shutdown");
+  grpc_connectivity_state_set(&glb_policy->state_tracker, GRPC_CHANNEL_SHUTDOWN,
+                              GRPC_ERROR_REF(error), "glb_shutdown");
 
   while (pp != nullptr) {
     pending_pick* next = pp->next;
     *pp->target = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, &pp->wrapped_on_complete_arg.wrapper_closure,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel Shutdown"));
+    GRPC_CLOSURE_SCHED(&pp->wrapped_on_complete_arg.wrapper_closure,
+                       GRPC_ERROR_REF(error));
     gpr_free(pp);
     pp = next;
   }
 
   while (pping != nullptr) {
     pending_ping* next = pping->next;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, &pping->wrapped_notify_arg.wrapper_closure,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel Shutdown"));
+    if (pping->on_initiate != nullptr) {
+      GRPC_CLOSURE_SCHED(&pping->on_initiate->wrapper_closure,
+                         GRPC_ERROR_REF(error));
+      gpr_free(pping->on_initiate);
+    }
+    if (pping->on_ack != nullptr) {
+      GRPC_CLOSURE_SCHED(&pping->on_ack->wrapper_closure,
+                         GRPC_ERROR_REF(error));
+      gpr_free(pping->on_ack);
+    }
     gpr_free(pping);
     pping = next;
   }
+  GRPC_ERROR_UNREF(error);
 }
 
 // Cancel a specific pending pick.
@@ -1063,8 +1084,8 @@
 //   pick needs also be cancelled by the RR instance.
 // - Otherwise, without an RR instance, picks stay pending at this policy's
 //   level (grpclb), inside the glb_policy->pending_picks list. To cancel these,
-//   we invoke the completion closure and set *target to NULL right here.
-static void glb_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+//   we invoke the completion closure and set *target to nullptr right here.
+static void glb_cancel_pick_locked(grpc_lb_policy* pol,
                                    grpc_connected_subchannel** target,
                                    grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
@@ -1074,7 +1095,7 @@
     pending_pick* next = pp->next;
     if (pp->target == target) {
       *target = nullptr;
-      GRPC_CLOSURE_SCHED(exec_ctx, &pp->wrapped_on_complete_arg.wrapper_closure,
+      GRPC_CLOSURE_SCHED(&pp->wrapped_on_complete_arg.wrapper_closure,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick Cancelled", &error, 1));
     } else {
@@ -1084,7 +1105,7 @@
     pp = next;
   }
   if (glb_policy->rr_policy != nullptr) {
-    grpc_lb_policy_cancel_pick_locked(exec_ctx, glb_policy->rr_policy, target,
+    grpc_lb_policy_cancel_pick_locked(glb_policy->rr_policy, target,
                                       GRPC_ERROR_REF(error));
   }
   GRPC_ERROR_UNREF(error);
@@ -1099,9 +1120,8 @@
 //   pick needs also be cancelled by the RR instance.
 // - Otherwise, without an RR instance, picks stay pending at this policy's
 //   level (grpclb), inside the glb_policy->pending_picks list. To cancel these,
-//   we invoke the completion closure and set *target to NULL right here.
-static void glb_cancel_picks_locked(grpc_exec_ctx* exec_ctx,
-                                    grpc_lb_policy* pol,
+//   we invoke the completion closure and set *target to nullptr right here.
+static void glb_cancel_picks_locked(grpc_lb_policy* pol,
                                     uint32_t initial_metadata_flags_mask,
                                     uint32_t initial_metadata_flags_eq,
                                     grpc_error* error) {
@@ -1112,7 +1132,7 @@
     pending_pick* next = pp->next;
     if ((pp->pick_args.initial_metadata_flags & initial_metadata_flags_mask) ==
         initial_metadata_flags_eq) {
-      GRPC_CLOSURE_SCHED(exec_ctx, &pp->wrapped_on_complete_arg.wrapper_closure,
+      GRPC_CLOSURE_SCHED(&pp->wrapped_on_complete_arg.wrapper_closure,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick Cancelled", &error, 1));
     } else {
@@ -1123,52 +1143,49 @@
   }
   if (glb_policy->rr_policy != nullptr) {
     grpc_lb_policy_cancel_picks_locked(
-        exec_ctx, glb_policy->rr_policy, initial_metadata_flags_mask,
+        glb_policy->rr_policy, initial_metadata_flags_mask,
         initial_metadata_flags_eq, GRPC_ERROR_REF(error));
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void lb_on_fallback_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error);
-static void query_for_backends_locked(grpc_exec_ctx* exec_ctx,
-                                      glb_lb_policy* glb_policy);
-static void start_picking_locked(grpc_exec_ctx* exec_ctx,
-                                 glb_lb_policy* glb_policy) {
+static void lb_on_fallback_timer_locked(void* arg, grpc_error* error);
+static void query_for_backends_locked(glb_lb_policy* glb_policy);
+static void start_picking_locked(glb_lb_policy* glb_policy) {
   /* start a timer to fall back */
   if (glb_policy->lb_fallback_timeout_ms > 0 &&
       glb_policy->serverlist == nullptr && !glb_policy->fallback_timer_active) {
     grpc_millis deadline =
-        grpc_exec_ctx_now(exec_ctx) + glb_policy->lb_fallback_timeout_ms;
+        grpc_core::ExecCtx::Get()->Now() + glb_policy->lb_fallback_timeout_ms;
     GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "grpclb_fallback_timer");
     GRPC_CLOSURE_INIT(&glb_policy->lb_on_fallback, lb_on_fallback_timer_locked,
                       glb_policy,
                       grpc_combiner_scheduler(glb_policy->base.combiner));
     glb_policy->fallback_timer_active = true;
-    grpc_timer_init(exec_ctx, &glb_policy->lb_fallback_timer, deadline,
+    grpc_timer_init(&glb_policy->lb_fallback_timer, deadline,
                     &glb_policy->lb_on_fallback);
   }
 
   glb_policy->started_picking = true;
   grpc_backoff_reset(&glb_policy->lb_call_backoff_state);
-  query_for_backends_locked(exec_ctx, glb_policy);
+  query_for_backends_locked(glb_policy);
 }
 
-static void glb_exit_idle_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void glb_exit_idle_locked(grpc_lb_policy* pol) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   if (!glb_policy->started_picking) {
-    start_picking_locked(exec_ctx, glb_policy);
+    start_picking_locked(glb_policy);
   }
 }
 
-static int glb_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static int glb_pick_locked(grpc_lb_policy* pol,
                            const grpc_lb_policy_pick_args* pick_args,
                            grpc_connected_subchannel** target,
                            grpc_call_context_element* context, void** user_data,
                            grpc_closure* on_complete) {
   if (pick_args->lb_token_mdelem_storage == nullptr) {
     *target = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, on_complete,
+    GRPC_CLOSURE_SCHED(on_complete,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                            "No mdelem storage for the LB token. Load reporting "
                            "won't work without it. Failing"));
@@ -1178,8 +1195,8 @@
   bool pick_done = false;
   if (glb_policy->rr_policy != nullptr) {
     const grpc_connectivity_state rr_connectivity_state =
-        grpc_lb_policy_check_connectivity_locked(
-            exec_ctx, glb_policy->rr_policy, nullptr);
+        grpc_lb_policy_check_connectivity_locked(glb_policy->rr_policy,
+                                                 nullptr);
     // The glb_policy->rr_policy may have transitioned to SHUTDOWN but the
     // callback registered to capture this event
     // (glb_rr_connectivity_changed_locked) may not have been invoked yet. We
@@ -1216,9 +1233,8 @@
       wc_arg->initial_metadata = pick_args->initial_metadata;
       wc_arg->free_when_done = wc_arg;
       wc_arg->glb_policy = pol;
-      pick_done =
-          pick_from_internal_rr_locked(exec_ctx, glb_policy, pick_args,
-                                       false /* force_async */, target, wc_arg);
+      pick_done = pick_from_internal_rr_locked(
+          glb_policy, pick_args, false /* force_async */, target, wc_arg);
     }
   } else {  // glb_policy->rr_policy == NULL
     if (grpc_lb_glb_trace.enabled()) {
@@ -1229,7 +1245,7 @@
     add_pending_pick(&glb_policy->pending_picks, pick_args, target, context,
                      on_complete);
     if (!glb_policy->started_picking) {
-      start_picking_locked(exec_ctx, glb_policy);
+      start_picking_locked(glb_policy);
     }
     pick_done = false;
   }
@@ -1237,37 +1253,34 @@
 }
 
 static grpc_connectivity_state glb_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
-    grpc_error** connectivity_error) {
+    grpc_lb_policy* pol, grpc_error** connectivity_error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   return grpc_connectivity_state_get(&glb_policy->state_tracker,
                                      connectivity_error);
 }
 
-static void glb_ping_one_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
-                                grpc_closure* closure) {
+static void glb_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
+                                grpc_closure* on_ack) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
   if (glb_policy->rr_policy) {
-    grpc_lb_policy_ping_one_locked(exec_ctx, glb_policy->rr_policy, closure);
+    grpc_lb_policy_ping_one_locked(glb_policy->rr_policy, on_initiate, on_ack);
   } else {
-    add_pending_ping(&glb_policy->pending_pings, closure);
+    add_pending_ping(&glb_policy->pending_pings, on_initiate, on_ack);
     if (!glb_policy->started_picking) {
-      start_picking_locked(exec_ctx, glb_policy);
+      start_picking_locked(glb_policy);
     }
   }
 }
 
-static void glb_notify_on_state_change_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_lb_policy* pol,
+static void glb_notify_on_state_change_locked(grpc_lb_policy* pol,
                                               grpc_connectivity_state* current,
                                               grpc_closure* notify) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
-  grpc_connectivity_state_notify_on_state_change(
-      exec_ctx, &glb_policy->state_tracker, current, notify);
+  grpc_connectivity_state_notify_on_state_change(&glb_policy->state_tracker,
+                                                 current, notify);
 }
 
-static void lb_call_on_retry_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                          grpc_error* error) {
+static void lb_call_on_retry_timer_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   glb_policy->retry_timer_active = false;
   if (!glb_policy->shutting_down && glb_policy->lb_call == nullptr &&
@@ -1275,28 +1288,26 @@
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_INFO, "[grpclb %p] Restarting call to LB server", glb_policy);
     }
-    query_for_backends_locked(exec_ctx, glb_policy);
+    query_for_backends_locked(glb_policy);
   }
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base, "grpclb_retry_timer");
+  GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "grpclb_retry_timer");
 }
 
-static void maybe_restart_lb_call(grpc_exec_ctx* exec_ctx,
-                                  glb_lb_policy* glb_policy) {
+static void maybe_restart_lb_call(glb_lb_policy* glb_policy) {
   if (glb_policy->started_picking && glb_policy->updating_lb_call) {
     if (glb_policy->retry_timer_active) {
-      grpc_timer_cancel(exec_ctx, &glb_policy->lb_call_retry_timer);
+      grpc_timer_cancel(&glb_policy->lb_call_retry_timer);
     }
-    if (!glb_policy->shutting_down) start_picking_locked(exec_ctx, glb_policy);
+    if (!glb_policy->shutting_down) start_picking_locked(glb_policy);
     glb_policy->updating_lb_call = false;
   } else if (!glb_policy->shutting_down) {
     /* if we aren't shutting down, restart the LB client call after some time */
-    grpc_millis next_try =
-        grpc_backoff_step(exec_ctx, &glb_policy->lb_call_backoff_state)
-            .next_attempt_start_time;
+    grpc_millis next_try = grpc_backoff_step(&glb_policy->lb_call_backoff_state)
+                               .next_attempt_start_time;
     if (grpc_lb_glb_trace.enabled()) {
       gpr_log(GPR_DEBUG, "[grpclb %p] Connection to LB server lost...",
               glb_policy);
-      grpc_millis timeout = next_try - grpc_exec_ctx_now(exec_ctx);
+      grpc_millis timeout = next_try - grpc_core::ExecCtx::Get()->Now();
       if (timeout > 0) {
         gpr_log(GPR_DEBUG,
                 "[grpclb %p] ... retry_timer_active in %" PRIuPTR "ms.",
@@ -1311,43 +1322,40 @@
                       lb_call_on_retry_timer_locked, glb_policy,
                       grpc_combiner_scheduler(glb_policy->base.combiner));
     glb_policy->retry_timer_active = true;
-    grpc_timer_init(exec_ctx, &glb_policy->lb_call_retry_timer, next_try,
+    grpc_timer_init(&glb_policy->lb_call_retry_timer, next_try,
                     &glb_policy->lb_on_call_retry);
   }
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+  GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base,
                             "lb_on_server_status_received_locked");
 }
 
-static void send_client_load_report_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error);
+static void send_client_load_report_locked(void* arg, grpc_error* error);
 
-static void schedule_next_client_load_report(grpc_exec_ctx* exec_ctx,
-                                             glb_lb_policy* glb_policy) {
+static void schedule_next_client_load_report(glb_lb_policy* glb_policy) {
   const grpc_millis next_client_load_report_time =
-      grpc_exec_ctx_now(exec_ctx) + glb_policy->client_stats_report_interval;
+      grpc_core::ExecCtx::Get()->Now() +
+      glb_policy->client_stats_report_interval;
   GRPC_CLOSURE_INIT(&glb_policy->client_load_report_closure,
                     send_client_load_report_locked, glb_policy,
                     grpc_combiner_scheduler(glb_policy->base.combiner));
-  grpc_timer_init(exec_ctx, &glb_policy->client_load_report_timer,
+  grpc_timer_init(&glb_policy->client_load_report_timer,
                   next_client_load_report_time,
                   &glb_policy->client_load_report_closure);
 }
 
-static void client_load_report_done_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void client_load_report_done_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   grpc_byte_buffer_destroy(glb_policy->client_load_report_payload);
   glb_policy->client_load_report_payload = nullptr;
   if (error != GRPC_ERROR_NONE || glb_policy->lb_call == nullptr) {
     glb_policy->client_load_report_timer_pending = false;
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                              "client_load_report");
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "client_load_report");
     if (glb_policy->lb_call == nullptr) {
-      maybe_restart_lb_call(exec_ctx, glb_policy);
+      maybe_restart_lb_call(glb_policy);
     }
     return;
   }
-  schedule_next_client_load_report(exec_ctx, glb_policy);
+  schedule_next_client_load_report(glb_policy);
 }
 
 static bool load_report_counters_are_zero(grpc_grpclb_request* request) {
@@ -1362,15 +1370,13 @@
          (drop_entries == nullptr || drop_entries->num_entries == 0);
 }
 
-static void send_client_load_report_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void send_client_load_report_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   if (error == GRPC_ERROR_CANCELLED || glb_policy->lb_call == nullptr) {
     glb_policy->client_load_report_timer_pending = false;
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                              "client_load_report");
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "client_load_report");
     if (glb_policy->lb_call == nullptr) {
-      maybe_restart_lb_call(exec_ctx, glb_policy);
+      maybe_restart_lb_call(glb_policy);
     }
     return;
   }
@@ -1383,7 +1389,7 @@
   if (load_report_counters_are_zero(request)) {
     if (glb_policy->last_client_load_report_counters_were_zero) {
       grpc_grpclb_request_destroy(request);
-      schedule_next_client_load_report(exec_ctx, glb_policy);
+      schedule_next_client_load_report(glb_policy);
       return;
     }
     glb_policy->last_client_load_report_counters_were_zero = true;
@@ -1393,7 +1399,7 @@
   grpc_slice request_payload_slice = grpc_grpclb_request_encode(request);
   glb_policy->client_load_report_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
-  grpc_slice_unref_internal(exec_ctx, request_payload_slice);
+  grpc_slice_unref_internal(request_payload_slice);
   grpc_grpclb_request_destroy(request);
   // Send load report message.
   grpc_op op;
@@ -1404,20 +1410,16 @@
                     client_load_report_done_locked, glb_policy,
                     grpc_combiner_scheduler(glb_policy->base.combiner));
   grpc_call_error call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_call, &op, 1,
-      &glb_policy->client_load_report_closure);
+      glb_policy->lb_call, &op, 1, &glb_policy->client_load_report_closure);
   if (call_error != GRPC_CALL_OK) {
     gpr_log(GPR_ERROR, "[grpclb %p] call_error=%d", glb_policy, call_error);
     GPR_ASSERT(GRPC_CALL_OK == call_error);
   }
 }
 
-static void lb_on_server_status_received_locked(grpc_exec_ctx* exec_ctx,
-                                                void* arg, grpc_error* error);
-static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error);
-static void lb_call_init_locked(grpc_exec_ctx* exec_ctx,
-                                glb_lb_policy* glb_policy) {
+static void lb_on_server_status_received_locked(void* arg, grpc_error* error);
+static void lb_on_response_received_locked(void* arg, grpc_error* error);
+static void lb_call_init_locked(glb_lb_policy* glb_policy) {
   GPR_ASSERT(glb_policy->server_name != nullptr);
   GPR_ASSERT(glb_policy->server_name[0] != '\0');
   GPR_ASSERT(glb_policy->lb_call == nullptr);
@@ -1430,13 +1432,13 @@
   grpc_millis deadline =
       glb_policy->lb_call_timeout_ms == 0
           ? GRPC_MILLIS_INF_FUTURE
-          : grpc_exec_ctx_now(exec_ctx) + glb_policy->lb_call_timeout_ms;
+          : grpc_core::ExecCtx::Get()->Now() + glb_policy->lb_call_timeout_ms;
   glb_policy->lb_call = grpc_channel_create_pollset_set_call(
-      exec_ctx, glb_policy->lb_channel, nullptr, GRPC_PROPAGATE_DEFAULTS,
+      glb_policy->lb_channel, nullptr, GRPC_PROPAGATE_DEFAULTS,
       glb_policy->base.interested_parties,
       GRPC_MDSTR_SLASH_GRPC_DOT_LB_DOT_V1_DOT_LOADBALANCER_SLASH_BALANCELOAD,
       &host, deadline, nullptr);
-  grpc_slice_unref_internal(exec_ctx, host);
+  grpc_slice_unref_internal(host);
 
   if (glb_policy->client_stats != nullptr) {
     grpc_grpclb_client_stats_unref(glb_policy->client_stats);
@@ -1451,7 +1453,7 @@
   grpc_slice request_payload_slice = grpc_grpclb_request_encode(request);
   glb_policy->lb_request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
-  grpc_slice_unref_internal(exec_ctx, request_payload_slice);
+  grpc_slice_unref_internal(request_payload_slice);
   grpc_grpclb_request_destroy(request);
 
   GRPC_CLOSURE_INIT(&glb_policy->lb_on_server_status_received,
@@ -1472,8 +1474,7 @@
   glb_policy->last_client_load_report_counters_were_zero = false;
 }
 
-static void lb_call_destroy_locked(grpc_exec_ctx* exec_ctx,
-                                   glb_lb_policy* glb_policy) {
+static void lb_call_destroy_locked(glb_lb_policy* glb_policy) {
   GPR_ASSERT(glb_policy->lb_call != nullptr);
   grpc_call_unref(glb_policy->lb_call);
   glb_policy->lb_call = nullptr;
@@ -1482,22 +1483,21 @@
   grpc_metadata_array_destroy(&glb_policy->lb_trailing_metadata_recv);
 
   grpc_byte_buffer_destroy(glb_policy->lb_request_payload);
-  grpc_slice_unref_internal(exec_ctx, glb_policy->lb_call_status_details);
+  grpc_slice_unref_internal(glb_policy->lb_call_status_details);
 
   if (glb_policy->client_load_report_timer_pending) {
-    grpc_timer_cancel(exec_ctx, &glb_policy->client_load_report_timer);
+    grpc_timer_cancel(&glb_policy->client_load_report_timer);
   }
 }
 
 /*
  * Auxiliary functions and LB client callbacks.
  */
-static void query_for_backends_locked(grpc_exec_ctx* exec_ctx,
-                                      glb_lb_policy* glb_policy) {
+static void query_for_backends_locked(glb_lb_policy* glb_policy) {
   GPR_ASSERT(glb_policy->lb_channel != nullptr);
   if (glb_policy->shutting_down) return;
 
-  lb_call_init_locked(exec_ctx, glb_policy);
+  lb_call_init_locked(glb_policy);
 
   if (grpc_lb_glb_trace.enabled()) {
     gpr_log(GPR_INFO,
@@ -1528,8 +1528,8 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops), nullptr);
+  call_error = grpc_call_start_batch_and_execute(glb_policy->lb_call, ops,
+                                                 (size_t)(op - ops), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
 
   op = ops;
@@ -1547,7 +1547,7 @@
   GRPC_LB_POLICY_WEAK_REF(&glb_policy->base,
                           "lb_on_server_status_received_locked");
   call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+      glb_policy->lb_call, ops, (size_t)(op - ops),
       &glb_policy->lb_on_server_status_received);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
 
@@ -1561,13 +1561,12 @@
    * lb_on_response_received_locked */
   GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "lb_on_response_received_locked");
   call_error = grpc_call_start_batch_and_execute(
-      exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+      glb_policy->lb_call, ops, (size_t)(op - ops),
       &glb_policy->lb_on_response_received);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
 }
 
-static void lb_on_response_received_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void lb_on_response_received_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   grpc_op ops[2];
   memset(ops, 0, sizeof(ops));
@@ -1601,7 +1600,7 @@
          * send_client_load_report_locked() */
         glb_policy->client_load_report_timer_pending = true;
         GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "client_load_report");
-        schedule_next_client_load_report(exec_ctx, glb_policy);
+        schedule_next_client_load_report(glb_policy);
       } else if (grpc_lb_glb_trace.enabled()) {
         gpr_log(GPR_INFO,
                 "[grpclb %p] Received initial LB response message; client load "
@@ -1646,11 +1645,10 @@
               grpc_grpclb_destroy_serverlist(glb_policy->serverlist);
             } else {
               /* or dispose of the fallback */
-              grpc_lb_addresses_destroy(exec_ctx,
-                                        glb_policy->fallback_backend_addresses);
+              grpc_lb_addresses_destroy(glb_policy->fallback_backend_addresses);
               glb_policy->fallback_backend_addresses = nullptr;
               if (glb_policy->fallback_timer_active) {
-                grpc_timer_cancel(exec_ctx, &glb_policy->lb_fallback_timer);
+                grpc_timer_cancel(&glb_policy->lb_fallback_timer);
                 glb_policy->fallback_timer_active = false;
               }
             }
@@ -1659,7 +1657,7 @@
              * update or in glb_destroy() */
             glb_policy->serverlist = serverlist;
             glb_policy->serverlist_index = 0;
-            rr_handover_locked(exec_ctx, glb_policy);
+            rr_handover_locked(glb_policy);
           }
         } else {
           if (grpc_lb_glb_trace.enabled()) {
@@ -1669,14 +1667,14 @@
           }
           grpc_grpclb_destroy_serverlist(serverlist);
         }
-      } else { /* serverlist == NULL */
+      } else { /* serverlist == nullptr */
         gpr_log(GPR_ERROR,
                 "[grpclb %p] Invalid LB response received: '%s'. Ignoring.",
                 glb_policy,
                 grpc_dump_slice(response_slice, GPR_DUMP_ASCII | GPR_DUMP_HEX));
       }
     }
-    grpc_slice_unref_internal(exec_ctx, response_slice);
+    grpc_slice_unref_internal(response_slice);
     if (!glb_policy->shutting_down) {
       /* keep listening for serverlist updates */
       op->op = GRPC_OP_RECV_MESSAGE;
@@ -1687,23 +1685,22 @@
       /* reuse the "lb_on_response_received_locked" weak ref taken in
        * query_for_backends_locked() */
       const grpc_call_error call_error = grpc_call_start_batch_and_execute(
-          exec_ctx, glb_policy->lb_call, ops, (size_t)(op - ops),
+          glb_policy->lb_call, ops, (size_t)(op - ops),
           &glb_policy->lb_on_response_received); /* loop */
       GPR_ASSERT(GRPC_CALL_OK == call_error);
     } else {
-      GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+      GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base,
                                 "lb_on_response_received_locked_shutdown");
     }
   } else { /* empty payload: call cancelled. */
            /* dispose of the "lb_on_response_received_locked" weak ref taken in
             * query_for_backends_locked() and reused in every reception loop */
-    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+    GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base,
                               "lb_on_response_received_locked_empty_payload");
   }
 }
 
-static void lb_on_fallback_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void lb_on_fallback_timer_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   glb_policy->fallback_timer_active = false;
   /* If we receive a serverlist after the timer fires but before this callback
@@ -1716,15 +1713,13 @@
                 glb_policy);
       }
       GPR_ASSERT(glb_policy->fallback_backend_addresses != nullptr);
-      rr_handover_locked(exec_ctx, glb_policy);
+      rr_handover_locked(glb_policy);
     }
   }
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
-                            "grpclb_fallback_timer");
+  GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base, "grpclb_fallback_timer");
 }
 
-static void lb_on_server_status_received_locked(grpc_exec_ctx* exec_ctx,
-                                                void* arg, grpc_error* error) {
+static void lb_on_server_status_received_locked(void* arg, grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   GPR_ASSERT(glb_policy->lb_call != nullptr);
   if (grpc_lb_glb_trace.enabled()) {
@@ -1738,29 +1733,28 @@
     gpr_free(status_details);
   }
   /* We need to perform cleanups no matter what. */
-  lb_call_destroy_locked(exec_ctx, glb_policy);
+  lb_call_destroy_locked(glb_policy);
   // If the load report timer is still pending, we wait for it to be
   // called before restarting the call.  Otherwise, we restart the call
   // here.
   if (!glb_policy->client_load_report_timer_pending) {
-    maybe_restart_lb_call(exec_ctx, glb_policy);
+    maybe_restart_lb_call(glb_policy);
   }
 }
 
-static void fallback_update_locked(grpc_exec_ctx* exec_ctx,
-                                   glb_lb_policy* glb_policy,
+static void fallback_update_locked(glb_lb_policy* glb_policy,
                                    const grpc_lb_addresses* addresses) {
   GPR_ASSERT(glb_policy->fallback_backend_addresses != nullptr);
-  grpc_lb_addresses_destroy(exec_ctx, glb_policy->fallback_backend_addresses);
+  grpc_lb_addresses_destroy(glb_policy->fallback_backend_addresses);
   glb_policy->fallback_backend_addresses =
-      extract_backend_addresses_locked(exec_ctx, addresses);
-  if (glb_policy->started_picking && glb_policy->lb_fallback_timeout_ms > 0 &&
-      !glb_policy->fallback_timer_active) {
-    rr_handover_locked(exec_ctx, glb_policy);
+      extract_backend_addresses_locked(addresses);
+  if (glb_policy->lb_fallback_timeout_ms > 0 &&
+      glb_policy->rr_policy != nullptr) {
+    rr_handover_locked(glb_policy);
   }
 }
 
-static void glb_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+static void glb_update_locked(grpc_lb_policy* policy,
                               const grpc_lb_policy_args* args) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)policy;
   const grpc_arg* arg =
@@ -1770,7 +1764,7 @@
       // If we don't have a current channel to the LB, go into TRANSIENT
       // FAILURE.
       grpc_connectivity_state_set(
-          exec_ctx, &glb_policy->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          &glb_policy->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Missing update in args"),
           "glb_update_missing");
     } else {
@@ -1787,16 +1781,16 @@
   // If a non-empty serverlist hasn't been received from the balancer,
   // propagate the update to fallback_backend_addresses.
   if (glb_policy->serverlist == nullptr) {
-    fallback_update_locked(exec_ctx, glb_policy, addresses);
+    fallback_update_locked(glb_policy, addresses);
   }
   GPR_ASSERT(glb_policy->lb_channel != nullptr);
   // Propagate updates to the LB channel (pick_first) through the fake
   // resolver.
   grpc_channel_args* lb_channel_args = build_lb_channel_args(
-      exec_ctx, addresses, glb_policy->response_generator, args->args);
+      addresses, glb_policy->response_generator, args->args);
   grpc_fake_resolver_response_generator_set_response(
-      exec_ctx, glb_policy->response_generator, lb_channel_args);
-  grpc_channel_args_destroy(exec_ctx, lb_channel_args);
+      glb_policy->response_generator, lb_channel_args);
+  grpc_channel_args_destroy(lb_channel_args);
   // Start watching the LB channel connectivity for connection, if not
   // already doing so.
   if (!glb_policy->watching_lb_channel) {
@@ -1808,7 +1802,7 @@
     glb_policy->watching_lb_channel = true;
     GRPC_LB_POLICY_WEAK_REF(&glb_policy->base, "watch_lb_channel_connectivity");
     grpc_client_channel_watch_connectivity_state(
-        exec_ctx, client_channel_elem,
+        client_channel_elem,
         grpc_polling_entity_create_from_pollset_set(
             glb_policy->base.interested_parties),
         &glb_policy->lb_channel_connectivity,
@@ -1819,8 +1813,7 @@
 // Invoked as part of the update process. It continues watching the LB channel
 // until it shuts down or becomes READY. It's invoked even if the LB channel
 // stayed READY throughout the update (for example if the update is identical).
-static void glb_lb_channel_on_connectivity_changed_cb(grpc_exec_ctx* exec_ctx,
-                                                      void* arg,
+static void glb_lb_channel_on_connectivity_changed_cb(void* arg,
                                                       grpc_error* error) {
   glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
   if (glb_policy->shutting_down) goto done;
@@ -1836,7 +1829,7 @@
               grpc_channel_get_channel_stack(glb_policy->lb_channel));
       GPR_ASSERT(client_channel_elem->filter == &grpc_client_channel_filter);
       grpc_client_channel_watch_connectivity_state(
-          exec_ctx, client_channel_elem,
+          client_channel_elem,
           grpc_polling_entity_create_from_pollset_set(
               glb_policy->base.interested_parties),
           &glb_policy->lb_channel_connectivity,
@@ -1853,23 +1846,36 @@
         grpc_call_cancel(glb_policy->lb_call, nullptr);
         // lb_on_server_status_received() will pick up the cancel and reinit
         // lb_call.
-      } else if (glb_policy->started_picking && !glb_policy->shutting_down) {
+      } else if (glb_policy->started_picking) {
         if (glb_policy->retry_timer_active) {
-          grpc_timer_cancel(exec_ctx, &glb_policy->lb_call_retry_timer);
+          grpc_timer_cancel(&glb_policy->lb_call_retry_timer);
           glb_policy->retry_timer_active = false;
         }
-        start_picking_locked(exec_ctx, glb_policy);
+        start_picking_locked(glb_policy);
       }
     /* fallthrough */
     case GRPC_CHANNEL_SHUTDOWN:
     done:
       glb_policy->watching_lb_channel = false;
-      GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &glb_policy->base,
+      GRPC_LB_POLICY_WEAK_UNREF(&glb_policy->base,
                                 "watch_lb_channel_connectivity_cb_shutdown");
       break;
   }
 }
 
+static void glb_set_reresolve_closure_locked(
+    grpc_lb_policy* policy, grpc_closure* request_reresolution) {
+  glb_lb_policy* glb_policy = (glb_lb_policy*)policy;
+  GPR_ASSERT(!glb_policy->shutting_down);
+  GPR_ASSERT(glb_policy->base.request_reresolution == nullptr);
+  if (glb_policy->rr_policy != nullptr) {
+    grpc_lb_policy_set_reresolve_closure_locked(glb_policy->rr_policy,
+                                                request_reresolution);
+  } else {
+    glb_policy->base.request_reresolution = request_reresolution;
+  }
+}
+
 /* Code wiring the policy with the rest of the core */
 static const grpc_lb_policy_vtable glb_lb_policy_vtable = {
     glb_destroy,
@@ -1881,10 +1887,10 @@
     glb_exit_idle_locked,
     glb_check_connectivity_locked,
     glb_notify_on_state_change_locked,
-    glb_update_locked};
+    glb_update_locked,
+    glb_set_reresolve_closure_locked};
 
-static grpc_lb_policy* glb_create(grpc_exec_ctx* exec_ctx,
-                                  grpc_lb_policy_factory* factory,
+static grpc_lb_policy* glb_create(grpc_lb_policy_factory* factory,
                                   grpc_lb_policy_args* args) {
   /* Count the number of gRPC-LB addresses. There must be at least one. */
   const grpc_arg* arg =
@@ -1905,7 +1911,7 @@
   arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI);
   GPR_ASSERT(arg != nullptr);
   GPR_ASSERT(arg->type == GRPC_ARG_STRING);
-  grpc_uri* uri = grpc_uri_parse(exec_ctx, arg->value.string, true);
+  grpc_uri* uri = grpc_uri_parse(arg->value.string, true);
   GPR_ASSERT(uri->path[0] != '\0');
   glb_policy->server_name =
       gpr_strdup(uri->path[0] == '/' ? uri->path + 1 : uri->path);
@@ -1938,26 +1944,26 @@
   /* Extract the backend addresses (may be empty) from the resolver for
    * fallback. */
   glb_policy->fallback_backend_addresses =
-      extract_backend_addresses_locked(exec_ctx, addresses);
+      extract_backend_addresses_locked(addresses);
 
   /* Create a client channel over them to communicate with a LB service */
   glb_policy->response_generator =
       grpc_fake_resolver_response_generator_create();
   grpc_channel_args* lb_channel_args = build_lb_channel_args(
-      exec_ctx, addresses, glb_policy->response_generator, args->args);
+      addresses, glb_policy->response_generator, args->args);
   char* uri_str;
   gpr_asprintf(&uri_str, "fake:///%s", glb_policy->server_name);
   glb_policy->lb_channel = grpc_lb_policy_grpclb_create_lb_channel(
-      exec_ctx, uri_str, args->client_channel_factory, lb_channel_args);
+      uri_str, args->client_channel_factory, lb_channel_args);
 
   /* Propagate initial resolution */
   grpc_fake_resolver_response_generator_set_response(
-      exec_ctx, glb_policy->response_generator, lb_channel_args);
-  grpc_channel_args_destroy(exec_ctx, lb_channel_args);
+      glb_policy->response_generator, lb_channel_args);
+  grpc_channel_args_destroy(lb_channel_args);
   gpr_free(uri_str);
   if (glb_policy->lb_channel == nullptr) {
     gpr_free((void*)glb_policy->server_name);
-    grpc_channel_args_destroy(exec_ctx, glb_policy->args);
+    grpc_channel_args_destroy(glb_policy->args);
     gpr_free(glb_policy);
     return nullptr;
   }
@@ -1988,7 +1994,7 @@
 
 // Only add client_load_reporting filter if the grpclb LB policy is used.
 static bool maybe_add_client_load_reporting_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   const grpc_arg* channel_arg =
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc
index aacaec1..a8ecea4 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc
@@ -26,17 +26,17 @@
 #include "src/core/lib/support/string.h"
 
 grpc_channel* grpc_lb_policy_grpclb_create_lb_channel(
-    grpc_exec_ctx* exec_ctx, const char* lb_service_target_addresses,
+    const char* lb_service_target_addresses,
     grpc_client_channel_factory* client_channel_factory,
     grpc_channel_args* args) {
   grpc_channel* lb_channel = grpc_client_channel_factory_create_channel(
-      exec_ctx, client_channel_factory, lb_service_target_addresses,
+      client_channel_factory, lb_service_target_addresses,
       GRPC_CLIENT_CHANNEL_TYPE_LOAD_BALANCING, args);
   return lb_channel;
 }
 
 grpc_channel_args* grpc_lb_policy_grpclb_build_lb_channel_args(
-    grpc_exec_ctx* exec_ctx, grpc_slice_hash_table* targets_info,
+    grpc_slice_hash_table* targets_info,
     grpc_fake_resolver_response_generator* response_generator,
     const grpc_channel_args* args) {
   const grpc_arg to_add[] = {
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.h b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.h
index 70b1c28..56104b2 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.h
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.h
@@ -31,12 +31,12 @@
  * \a client_channel_factory will be used for the creation of the LB channel,
  * alongside the channel args passed in \a args. */
 grpc_channel* grpc_lb_policy_grpclb_create_lb_channel(
-    grpc_exec_ctx* exec_ctx, const char* lb_service_target_addresses,
+    const char* lb_service_target_addresses,
     grpc_client_channel_factory* client_channel_factory,
     grpc_channel_args* args);
 
 grpc_channel_args* grpc_lb_policy_grpclb_build_lb_channel_args(
-    grpc_exec_ctx* exec_ctx, grpc_slice_hash_table* targets_info,
+    grpc_slice_hash_table* targets_info,
     grpc_fake_resolver_response_generator* response_generator,
     const grpc_channel_args* args);
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc
index 8eaa90e..76bcddf 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc
@@ -29,7 +29,7 @@
 #include "src/core/lib/support/string.h"
 
 grpc_channel* grpc_lb_policy_grpclb_create_lb_channel(
-    grpc_exec_ctx* exec_ctx, const char* lb_service_target_addresses,
+    const char* lb_service_target_addresses,
     grpc_client_channel_factory* client_channel_factory,
     grpc_channel_args* args) {
   grpc_channel_args* new_args = args;
@@ -50,19 +50,19 @@
     new_args = grpc_channel_args_copy_and_add_and_remove(
         args, keys_to_remove, GPR_ARRAY_SIZE(keys_to_remove), args_to_add,
         GPR_ARRAY_SIZE(args_to_add));
-    grpc_channel_credentials_unref(exec_ctx, creds_sans_call_creds);
+    grpc_channel_credentials_unref(creds_sans_call_creds);
   }
   grpc_channel* lb_channel = grpc_client_channel_factory_create_channel(
-      exec_ctx, client_channel_factory, lb_service_target_addresses,
+      client_channel_factory, lb_service_target_addresses,
       GRPC_CLIENT_CHANNEL_TYPE_LOAD_BALANCING, new_args);
   if (channel_credentials != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, new_args);
+    grpc_channel_args_destroy(new_args);
   }
   return lb_channel;
 }
 
 grpc_channel_args* grpc_lb_policy_grpclb_build_lb_channel_args(
-    grpc_exec_ctx* exec_ctx, grpc_slice_hash_table* targets_info,
+    grpc_slice_hash_table* targets_info,
     grpc_fake_resolver_response_generator* response_generator,
     const grpc_channel_args* args) {
   const grpc_arg to_add[] = {
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
index 2c8d7f4..fc781da 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
@@ -215,9 +215,6 @@
       return nullptr;
     }
   }
-  if (res.server_list.has_expiration_interval) {
-    sl->expiration_interval = res.server_list.expiration_interval;
-  }
   return sl;
 }
 
@@ -237,8 +234,6 @@
   grpc_grpclb_serverlist* copy =
       (grpc_grpclb_serverlist*)gpr_zalloc(sizeof(grpc_grpclb_serverlist));
   copy->num_servers = sl->num_servers;
-  memcpy(&copy->expiration_interval, &sl->expiration_interval,
-         sizeof(grpc_grpclb_duration));
   copy->servers = (grpc_grpclb_server**)gpr_malloc(sizeof(grpc_grpclb_server*) *
                                                    sl->num_servers);
   for (size_t i = 0; i < sl->num_servers; i++) {
@@ -257,10 +252,6 @@
   if (lhs->num_servers != rhs->num_servers) {
     return false;
   }
-  if (grpc_grpclb_duration_compare(&lhs->expiration_interval,
-                                   &rhs->expiration_interval) != 0) {
-    return false;
-  }
   for (size_t i = 0; i < lhs->num_servers; i++) {
     if (!grpc_grpclb_server_equals(lhs->servers[i], rhs->servers[i])) {
       return false;
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h
index 017c40e..ccb0212 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h
@@ -35,7 +35,6 @@
 typedef struct {
   grpc_grpclb_server** servers;
   size_t num_servers;
-  grpc_grpclb_duration expiration_interval;
 } grpc_grpclb_serverlist;
 
 /** Create a request for a gRPC LB service under \a lb_service_name */
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c b/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
index 6a5d54c..4e6c5cc 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c
@@ -61,9 +61,8 @@
     PB_LAST_FIELD
 };
 
-const pb_field_t grpc_lb_v1_ServerList_fields[3] = {
+const pb_field_t grpc_lb_v1_ServerList_fields[2] = {
     PB_FIELD(  1, MESSAGE , REPEATED, CALLBACK, FIRST, grpc_lb_v1_ServerList, servers, servers, &grpc_lb_v1_Server_fields),
-    PB_FIELD(  3, MESSAGE , OPTIONAL, STATIC  , OTHER, grpc_lb_v1_ServerList, expiration_interval, servers, &grpc_lb_v1_Duration_fields),
     PB_LAST_FIELD
 };
 
@@ -85,7 +84,7 @@
  * numbers or field sizes that are larger than what can fit in 8 or 16 bit
  * field descriptors.
  */
-PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceRequest, client_stats) < 65536 && pb_membersize(grpc_lb_v1_ClientStats, timestamp) < 65536 && pb_membersize(grpc_lb_v1_ClientStats, calls_finished_with_drop) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, initial_response) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, server_list) < 65536 && pb_membersize(grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval) < 65536 && pb_membersize(grpc_lb_v1_ServerList, servers) < 65536 && pb_membersize(grpc_lb_v1_ServerList, expiration_interval) < 65536), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_grpc_lb_v1_Duration_grpc_lb_v1_Timestamp_grpc_lb_v1_LoadBalanceRequest_grpc_lb_v1_InitialLoadBalanceRequest_grpc_lb_v1_ClientStatsPerToken_grpc_lb_v1_ClientStats_grpc_lb_v1_LoadBalanceResponse_grpc_lb_v1_InitialLoadBalanceResponse_grpc_lb_v1_ServerList_grpc_lb_v1_Server)
+PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceRequest, client_stats) < 65536 && pb_membersize(grpc_lb_v1_ClientStats, timestamp) < 65536 && pb_membersize(grpc_lb_v1_ClientStats, calls_finished_with_drop) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, initial_response) < 65536 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, server_list) < 65536 && pb_membersize(grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval) < 65536 && pb_membersize(grpc_lb_v1_ServerList, servers) < 65536), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_grpc_lb_v1_Duration_grpc_lb_v1_Timestamp_grpc_lb_v1_LoadBalanceRequest_grpc_lb_v1_InitialLoadBalanceRequest_grpc_lb_v1_ClientStatsPerToken_grpc_lb_v1_ClientStats_grpc_lb_v1_LoadBalanceResponse_grpc_lb_v1_InitialLoadBalanceResponse_grpc_lb_v1_ServerList_grpc_lb_v1_Server)
 #endif
 
 #if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)
@@ -96,7 +95,7 @@
  * numbers or field sizes that are larger than what can fit in the default
  * 8 bit descriptors.
  */
-PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceRequest, client_stats) < 256 && pb_membersize(grpc_lb_v1_ClientStats, timestamp) < 256 && pb_membersize(grpc_lb_v1_ClientStats, calls_finished_with_drop) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, initial_response) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, server_list) < 256 && pb_membersize(grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval) < 256 && pb_membersize(grpc_lb_v1_ServerList, servers) < 256 && pb_membersize(grpc_lb_v1_ServerList, expiration_interval) < 256), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_grpc_lb_v1_Duration_grpc_lb_v1_Timestamp_grpc_lb_v1_LoadBalanceRequest_grpc_lb_v1_InitialLoadBalanceRequest_grpc_lb_v1_ClientStatsPerToken_grpc_lb_v1_ClientStats_grpc_lb_v1_LoadBalanceResponse_grpc_lb_v1_InitialLoadBalanceResponse_grpc_lb_v1_ServerList_grpc_lb_v1_Server)
+PB_STATIC_ASSERT((pb_membersize(grpc_lb_v1_LoadBalanceRequest, initial_request) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceRequest, client_stats) < 256 && pb_membersize(grpc_lb_v1_ClientStats, timestamp) < 256 && pb_membersize(grpc_lb_v1_ClientStats, calls_finished_with_drop) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, initial_response) < 256 && pb_membersize(grpc_lb_v1_LoadBalanceResponse, server_list) < 256 && pb_membersize(grpc_lb_v1_InitialLoadBalanceResponse, client_stats_report_interval) < 256 && pb_membersize(grpc_lb_v1_ServerList, servers) < 256), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_grpc_lb_v1_Duration_grpc_lb_v1_Timestamp_grpc_lb_v1_LoadBalanceRequest_grpc_lb_v1_InitialLoadBalanceRequest_grpc_lb_v1_ClientStatsPerToken_grpc_lb_v1_ClientStats_grpc_lb_v1_LoadBalanceResponse_grpc_lb_v1_InitialLoadBalanceResponse_grpc_lb_v1_ServerList_grpc_lb_v1_Server)
 #endif
 
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h b/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
index 93333d1..066c076 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h
@@ -14,6 +14,11 @@
 #endif
 
 /* Struct definitions */
+typedef struct _grpc_lb_v1_ServerList {
+    pb_callback_t servers;
+/* @@protoc_insertion_point(struct:grpc_lb_v1_ServerList) */
+} grpc_lb_v1_ServerList;
+
 typedef struct _grpc_lb_v1_ClientStatsPerToken {
     pb_callback_t load_balance_token;
     bool has_num_calls;
@@ -79,13 +84,6 @@
 /* @@protoc_insertion_point(struct:grpc_lb_v1_InitialLoadBalanceResponse) */
 } grpc_lb_v1_InitialLoadBalanceResponse;
 
-typedef struct _grpc_lb_v1_ServerList {
-    pb_callback_t servers;
-    bool has_expiration_interval;
-    grpc_lb_v1_Duration expiration_interval;
-/* @@protoc_insertion_point(struct:grpc_lb_v1_ServerList) */
-} grpc_lb_v1_ServerList;
-
 typedef struct _grpc_lb_v1_LoadBalanceRequest {
     bool has_initial_request;
     grpc_lb_v1_InitialLoadBalanceRequest initial_request;
@@ -113,7 +111,7 @@
 #define grpc_lb_v1_ClientStats_init_default      {false, grpc_lb_v1_Timestamp_init_default, false, 0, false, 0, false, 0, false, 0, {{NULL}, NULL}}
 #define grpc_lb_v1_LoadBalanceResponse_init_default {false, grpc_lb_v1_InitialLoadBalanceResponse_init_default, false, grpc_lb_v1_ServerList_init_default}
 #define grpc_lb_v1_InitialLoadBalanceResponse_init_default {false, "", false, grpc_lb_v1_Duration_init_default}
-#define grpc_lb_v1_ServerList_init_default       {{{NULL}, NULL}, false, grpc_lb_v1_Duration_init_default}
+#define grpc_lb_v1_ServerList_init_default       {{{NULL}, NULL}}
 #define grpc_lb_v1_Server_init_default           {false, {0, {0}}, false, 0, false, "", false, 0}
 #define grpc_lb_v1_Duration_init_zero            {false, 0, false, 0}
 #define grpc_lb_v1_Timestamp_init_zero           {false, 0, false, 0}
@@ -123,10 +121,11 @@
 #define grpc_lb_v1_ClientStats_init_zero         {false, grpc_lb_v1_Timestamp_init_zero, false, 0, false, 0, false, 0, false, 0, {{NULL}, NULL}}
 #define grpc_lb_v1_LoadBalanceResponse_init_zero {false, grpc_lb_v1_InitialLoadBalanceResponse_init_zero, false, grpc_lb_v1_ServerList_init_zero}
 #define grpc_lb_v1_InitialLoadBalanceResponse_init_zero {false, "", false, grpc_lb_v1_Duration_init_zero}
-#define grpc_lb_v1_ServerList_init_zero          {{{NULL}, NULL}, false, grpc_lb_v1_Duration_init_zero}
+#define grpc_lb_v1_ServerList_init_zero          {{{NULL}, NULL}}
 #define grpc_lb_v1_Server_init_zero              {false, {0, {0}}, false, 0, false, "", false, 0}
 
 /* Field tags (for use in manual encoding/decoding) */
+#define grpc_lb_v1_ServerList_servers_tag        1
 #define grpc_lb_v1_ClientStatsPerToken_load_balance_token_tag 1
 #define grpc_lb_v1_ClientStatsPerToken_num_calls_tag 2
 #define grpc_lb_v1_Duration_seconds_tag          1
@@ -146,8 +145,6 @@
 #define grpc_lb_v1_ClientStats_calls_finished_with_drop_tag 8
 #define grpc_lb_v1_InitialLoadBalanceResponse_load_balancer_delegate_tag 1
 #define grpc_lb_v1_InitialLoadBalanceResponse_client_stats_report_interval_tag 2
-#define grpc_lb_v1_ServerList_servers_tag        1
-#define grpc_lb_v1_ServerList_expiration_interval_tag 3
 #define grpc_lb_v1_LoadBalanceRequest_initial_request_tag 1
 #define grpc_lb_v1_LoadBalanceRequest_client_stats_tag 2
 #define grpc_lb_v1_LoadBalanceResponse_initial_response_tag 1
@@ -162,7 +159,7 @@
 extern const pb_field_t grpc_lb_v1_ClientStats_fields[7];
 extern const pb_field_t grpc_lb_v1_LoadBalanceResponse_fields[3];
 extern const pb_field_t grpc_lb_v1_InitialLoadBalanceResponse_fields[3];
-extern const pb_field_t grpc_lb_v1_ServerList_fields[3];
+extern const pb_field_t grpc_lb_v1_ServerList_fields[2];
 extern const pb_field_t grpc_lb_v1_Server_fields[5];
 
 /* Maximum encoded size of messages (where known) */
diff --git a/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc b/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
index 6cfc37e..0861261 100644
--- a/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
@@ -57,12 +57,12 @@
   grpc_connectivity_state_tracker state_tracker;
 } pick_first_lb_policy;
 
-static void pf_destroy(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void pf_destroy(grpc_lb_policy* pol) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   GPR_ASSERT(p->subchannel_list == nullptr);
   GPR_ASSERT(p->latest_pending_subchannel_list == nullptr);
   GPR_ASSERT(p->pending_picks == nullptr);
-  grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
+  grpc_connectivity_state_destroy(&p->state_tracker);
   gpr_free(p);
   grpc_subchannel_index_unref();
   if (grpc_lb_pick_first_trace.enabled()) {
@@ -70,8 +70,9 @@
   }
 }
 
-static void shutdown_locked(grpc_exec_ctx* exec_ctx, pick_first_lb_policy* p,
-                            grpc_error* error) {
+static void pf_shutdown_locked(grpc_lb_policy* pol) {
+  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   if (grpc_lb_pick_first_trace.enabled()) {
     gpr_log(GPR_DEBUG, "Pick First %p Shutting down", p);
   }
@@ -80,31 +81,27 @@
   while ((pp = p->pending_picks) != nullptr) {
     p->pending_picks = pp->next;
     *pp->target = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(pp->on_complete, GRPC_ERROR_REF(error));
     gpr_free(pp);
   }
-  grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                              GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
-                              "shutdown");
+  grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_SHUTDOWN,
+                              GRPC_ERROR_REF(error), "shutdown");
   if (p->subchannel_list != nullptr) {
-    grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+    grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                "pf_shutdown");
     p->subchannel_list = nullptr;
   }
   if (p->latest_pending_subchannel_list != nullptr) {
     grpc_lb_subchannel_list_shutdown_and_unref(
-        exec_ctx, p->latest_pending_subchannel_list, "pf_shutdown");
+        p->latest_pending_subchannel_list, "pf_shutdown");
     p->latest_pending_subchannel_list = nullptr;
   }
+  grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_pick_first_trace,
+                               GRPC_ERROR_CANCELLED);
   GRPC_ERROR_UNREF(error);
 }
 
-static void pf_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
-  shutdown_locked(exec_ctx, (pick_first_lb_policy*)pol,
-                  GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown"));
-}
-
-static void pf_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static void pf_cancel_pick_locked(grpc_lb_policy* pol,
                                   grpc_connected_subchannel** target,
                                   grpc_error* error) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
@@ -114,7 +111,7 @@
     pending_pick* next = pp->next;
     if (pp->target == target) {
       *target = nullptr;
-      GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete,
+      GRPC_CLOSURE_SCHED(pp->on_complete,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick Cancelled", &error, 1));
       gpr_free(pp);
@@ -127,7 +124,7 @@
   GRPC_ERROR_UNREF(error);
 }
 
-static void pf_cancel_picks_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static void pf_cancel_picks_locked(grpc_lb_policy* pol,
                                    uint32_t initial_metadata_flags_mask,
                                    uint32_t initial_metadata_flags_eq,
                                    grpc_error* error) {
@@ -138,7 +135,7 @@
     pending_pick* next = pp->next;
     if ((pp->initial_metadata_flags & initial_metadata_flags_mask) ==
         initial_metadata_flags_eq) {
-      GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete,
+      GRPC_CLOSURE_SCHED(pp->on_complete,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick Cancelled", &error, 1));
       gpr_free(pp);
@@ -151,27 +148,31 @@
   GRPC_ERROR_UNREF(error);
 }
 
-static void start_picking_locked(grpc_exec_ctx* exec_ctx,
-                                 pick_first_lb_policy* p) {
+static void start_picking_locked(pick_first_lb_policy* p) {
   p->started_picking = true;
   if (p->subchannel_list != nullptr &&
       p->subchannel_list->num_subchannels > 0) {
     p->subchannel_list->checking_subchannel = 0;
-    grpc_lb_subchannel_list_ref_for_connectivity_watch(
-        p->subchannel_list, "connectivity_watch+start_picking");
-    grpc_lb_subchannel_data_start_connectivity_watch(
-        exec_ctx, &p->subchannel_list->subchannels[0]);
+    for (size_t i = 0; i < p->subchannel_list->num_subchannels; ++i) {
+      if (p->subchannel_list->subchannels[i].subchannel != nullptr) {
+        grpc_lb_subchannel_list_ref_for_connectivity_watch(
+            p->subchannel_list, "connectivity_watch+start_picking");
+        grpc_lb_subchannel_data_start_connectivity_watch(
+            &p->subchannel_list->subchannels[i]);
+        break;
+      }
+    }
   }
 }
 
-static void pf_exit_idle_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void pf_exit_idle_locked(grpc_lb_policy* pol) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   if (!p->started_picking) {
-    start_picking_locked(exec_ctx, p);
+    start_picking_locked(p);
   }
 }
 
-static int pf_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static int pf_pick_locked(grpc_lb_policy* pol,
                           const grpc_lb_policy_pick_args* pick_args,
                           grpc_connected_subchannel** target,
                           grpc_call_context_element* context, void** user_data,
@@ -185,7 +186,7 @@
   }
   // No subchannel selected yet, so handle asynchronously.
   if (!p->started_picking) {
-    start_picking_locked(exec_ctx, p);
+    start_picking_locked(p);
   }
   pending_pick* pp = (pending_pick*)gpr_malloc(sizeof(*pp));
   pp->next = p->pending_picks;
@@ -196,48 +197,47 @@
   return 0;
 }
 
-static void destroy_unselected_subchannels_locked(grpc_exec_ctx* exec_ctx,
-                                                  pick_first_lb_policy* p) {
+static void destroy_unselected_subchannels_locked(pick_first_lb_policy* p) {
   for (size_t i = 0; i < p->subchannel_list->num_subchannels; ++i) {
     grpc_lb_subchannel_data* sd = &p->subchannel_list->subchannels[i];
     if (p->selected != sd) {
-      grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
+      grpc_lb_subchannel_data_unref_subchannel(sd,
                                                "selected_different_subchannel");
     }
   }
 }
 
 static grpc_connectivity_state pf_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol, grpc_error** error) {
+    grpc_lb_policy* pol, grpc_error** error) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   return grpc_connectivity_state_get(&p->state_tracker, error);
 }
 
-static void pf_notify_on_state_change_locked(grpc_exec_ctx* exec_ctx,
-                                             grpc_lb_policy* pol,
+static void pf_notify_on_state_change_locked(grpc_lb_policy* pol,
                                              grpc_connectivity_state* current,
                                              grpc_closure* notify) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
-  grpc_connectivity_state_notify_on_state_change(exec_ctx, &p->state_tracker,
-                                                 current, notify);
+  grpc_connectivity_state_notify_on_state_change(&p->state_tracker, current,
+                                                 notify);
 }
 
-static void pf_ping_one_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
-                               grpc_closure* closure) {
+static void pf_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
+                               grpc_closure* on_ack) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
   if (p->selected) {
-    grpc_connected_subchannel_ping(exec_ctx, p->selected->connected_subchannel,
-                                   closure);
+    grpc_connected_subchannel_ping(p->selected->connected_subchannel,
+                                   on_initiate, on_ack);
   } else {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure,
+    GRPC_CLOSURE_SCHED(on_initiate,
+                       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Not connected"));
+    GRPC_CLOSURE_SCHED(on_ack,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Not connected"));
   }
 }
 
-static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error);
+static void pf_connectivity_changed_locked(void* arg, grpc_error* error);
 
-static void pf_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+static void pf_update_locked(grpc_lb_policy* policy,
                              const grpc_lb_policy_args* args) {
   pick_first_lb_policy* p = (pick_first_lb_policy*)policy;
   const grpc_arg* arg =
@@ -246,7 +246,7 @@
     if (p->subchannel_list == nullptr) {
       // If we don't have a current subchannel list, go into TRANSIENT FAILURE.
       grpc_connectivity_state_set(
-          exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Missing update in args"),
           "pf_update_missing");
     } else {
@@ -265,17 +265,17 @@
             (void*)p, (unsigned long)addresses->num_addresses);
   }
   grpc_lb_subchannel_list* subchannel_list = grpc_lb_subchannel_list_create(
-      exec_ctx, &p->base, &grpc_lb_pick_first_trace, addresses, args,
+      &p->base, &grpc_lb_pick_first_trace, addresses, args,
       pf_connectivity_changed_locked);
   if (subchannel_list->num_subchannels == 0) {
     // Empty update or no valid subchannels. Unsubscribe from all current
     // subchannels and put the channel in TRANSIENT_FAILURE.
     grpc_connectivity_state_set(
-        exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+        &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Empty update"),
         "pf_update_empty");
     if (p->subchannel_list != nullptr) {
-      grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+      grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                  "sl_shutdown_empty_update");
     }
     p->subchannel_list = subchannel_list;  // Empty list.
@@ -286,7 +286,7 @@
     // We don't yet have a selected subchannel, so replace the current
     // subchannel list immediately.
     if (p->subchannel_list != nullptr) {
-      grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+      grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                  "pf_update_before_selected");
     }
     p->subchannel_list = subchannel_list;
@@ -311,19 +311,19 @@
         p->selected = sd;
         if (p->subchannel_list != nullptr) {
           grpc_lb_subchannel_list_shutdown_and_unref(
-              exec_ctx, p->subchannel_list, "pf_update_includes_selected");
+              p->subchannel_list, "pf_update_includes_selected");
         }
         p->subchannel_list = subchannel_list;
-        destroy_unselected_subchannels_locked(exec_ctx, p);
+        destroy_unselected_subchannels_locked(p);
         grpc_lb_subchannel_list_ref_for_connectivity_watch(
             subchannel_list, "connectivity_watch+replace_selected");
-        grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+        grpc_lb_subchannel_data_start_connectivity_watch(sd);
         // If there was a previously pending update (which may or may
         // not have contained the currently selected subchannel), drop
         // it, so that it doesn't override what we've done here.
         if (p->latest_pending_subchannel_list != nullptr) {
           grpc_lb_subchannel_list_shutdown_and_unref(
-              exec_ctx, p->latest_pending_subchannel_list,
+              p->latest_pending_subchannel_list,
               "pf_update_includes_selected+outdated");
           p->latest_pending_subchannel_list = nullptr;
         }
@@ -343,8 +343,7 @@
                 (void*)subchannel_list);
       }
       grpc_lb_subchannel_list_shutdown_and_unref(
-          exec_ctx, p->latest_pending_subchannel_list,
-          "sl_outdated_dont_smash");
+          p->latest_pending_subchannel_list, "sl_outdated_dont_smash");
     }
     p->latest_pending_subchannel_list = subchannel_list;
   }
@@ -354,12 +353,11 @@
     grpc_lb_subchannel_list_ref_for_connectivity_watch(
         subchannel_list, "connectivity_watch+update");
     grpc_lb_subchannel_data_start_connectivity_watch(
-        exec_ctx, &subchannel_list->subchannels[0]);
+        &subchannel_list->subchannels[0]);
   }
 }
 
-static void pf_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void pf_connectivity_changed_locked(void* arg, grpc_error* error) {
   grpc_lb_subchannel_data* sd = (grpc_lb_subchannel_data*)arg;
   pick_first_lb_policy* p = (pick_first_lb_policy*)sd->subchannel_list->policy;
   if (grpc_lb_pick_first_trace.enabled()) {
@@ -377,18 +375,18 @@
   }
   // If the policy is shutting down, unref and return.
   if (p->shutdown) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, "pf_shutdown");
-    grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "pf_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "pf_shutdown");
+    grpc_lb_subchannel_list_unref_for_connectivity_watch(sd->subchannel_list,
+                                                         "pf_shutdown");
     return;
   }
   // If the subchannel list is shutting down, stop watching.
   if (sd->subchannel_list->shutting_down || error == GRPC_ERROR_CANCELLED) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, "pf_sl_shutdown");
-    grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "pf_sl_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "pf_sl_shutdown");
+    grpc_lb_subchannel_list_unref_for_connectivity_watch(sd->subchannel_list,
+                                                         "pf_sl_shutdown");
     return;
   }
   // If we're still here, the notification must be for a subchannel in
@@ -404,29 +402,45 @@
     if (sd->curr_connectivity_state != GRPC_CHANNEL_READY &&
         p->latest_pending_subchannel_list != nullptr) {
       p->selected = nullptr;
+      grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+      grpc_lb_subchannel_list_unref_for_connectivity_watch(
+          sd->subchannel_list, "selected_not_ready+switch_to_update");
       grpc_lb_subchannel_list_shutdown_and_unref(
-          exec_ctx, p->subchannel_list, "selected_not_ready+switch_to_update");
+          p->subchannel_list, "selected_not_ready+switch_to_update");
       p->subchannel_list = p->latest_pending_subchannel_list;
       p->latest_pending_subchannel_list = nullptr;
       grpc_connectivity_state_set(
-          exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_REF(error), "selected_not_ready+switch_to_update");
     } else {
-      if (sd->curr_connectivity_state == GRPC_CHANNEL_TRANSIENT_FAILURE) {
-        /* if the selected channel goes bad, we're done */
-        sd->curr_connectivity_state = GRPC_CHANNEL_SHUTDOWN;
+      // TODO(juanlishen): we re-resolve when the selected subchannel goes to
+      // TRANSIENT_FAILURE because we used to shut down in this case before
+      // re-resolution is introduced. But we need to investigate whether we
+      // really want to take any action instead of waiting for the selected
+      // subchannel reconnecting.
+      if (sd->curr_connectivity_state == GRPC_CHANNEL_SHUTDOWN ||
+          sd->curr_connectivity_state == GRPC_CHANNEL_TRANSIENT_FAILURE) {
+        // If the selected channel goes bad, request a re-resolution.
+        grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_IDLE,
+                                    GRPC_ERROR_NONE,
+                                    "selected_changed+reresolve");
+        p->started_picking = false;
+        grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_pick_first_trace,
+                                     GRPC_ERROR_NONE);
+      } else {
+        grpc_connectivity_state_set(&p->state_tracker,
+                                    sd->curr_connectivity_state,
+                                    GRPC_ERROR_REF(error), "selected_changed");
       }
-      grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                  sd->curr_connectivity_state,
-                                  GRPC_ERROR_REF(error), "selected_changed");
       if (sd->curr_connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
         // Renew notification.
-        grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+        grpc_lb_subchannel_data_start_connectivity_watch(sd);
       } else {
-        grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
+        p->selected = nullptr;
+        grpc_lb_subchannel_data_stop_connectivity_watch(sd);
         grpc_lb_subchannel_list_unref_for_connectivity_watch(
-            exec_ctx, sd->subchannel_list, "pf_selected_shutdown");
-        shutdown_locked(exec_ctx, p, GRPC_ERROR_REF(error));
+            sd->subchannel_list, "pf_selected_shutdown");
+        grpc_lb_subchannel_data_unref_subchannel(sd, "pf_selected_shutdown");
       }
     }
     return;
@@ -446,15 +460,14 @@
       // p->subchannel_list.
       if (sd->subchannel_list == p->latest_pending_subchannel_list) {
         GPR_ASSERT(p->subchannel_list != nullptr);
-        grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+        grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                    "finish_update");
         p->subchannel_list = p->latest_pending_subchannel_list;
         p->latest_pending_subchannel_list = nullptr;
       }
       // Cases 1 and 2.
-      grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                  GRPC_CHANNEL_READY, GRPC_ERROR_NONE,
-                                  "connecting_ready");
+      grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_READY,
+                                  GRPC_ERROR_NONE, "connecting_ready");
       sd->connected_subchannel = GRPC_CONNECTED_SUBCHANNEL_REF(
           grpc_subchannel_get_connected_subchannel(sd->subchannel),
           "connected");
@@ -464,7 +477,7 @@
                 (void*)sd->subchannel);
       }
       // Drop all other subchannels, since we are now connected.
-      destroy_unselected_subchannels_locked(exec_ctx, p);
+      destroy_unselected_subchannels_locked(p);
       // Update any calls that were waiting for a pick.
       pending_pick* pp;
       while ((pp = p->pending_picks)) {
@@ -476,15 +489,15 @@
                   "Servicing pending pick with selected subchannel %p",
                   (void*)p->selected);
         }
-        GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(pp->on_complete, GRPC_ERROR_NONE);
         gpr_free(pp);
       }
       // Renew notification.
-      grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_start_connectivity_watch(sd);
       break;
     }
     case GRPC_CHANNEL_TRANSIENT_FAILURE: {
-      grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_stop_connectivity_watch(sd);
       do {
         sd->subchannel_list->checking_subchannel =
             (sd->subchannel_list->checking_subchannel + 1) %
@@ -497,29 +510,28 @@
       if (sd->subchannel_list->checking_subchannel == 0 &&
           sd->subchannel_list == p->subchannel_list) {
         grpc_connectivity_state_set(
-            exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+            &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
             GRPC_ERROR_REF(error), "connecting_transient_failure");
       }
       // Reuses the connectivity refs from the previous watch.
-      grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_start_connectivity_watch(sd);
       break;
     }
     case GRPC_CHANNEL_CONNECTING:
     case GRPC_CHANNEL_IDLE: {
       // Only update connectivity state in case 1.
       if (sd->subchannel_list == p->subchannel_list) {
-        grpc_connectivity_state_set(
-            exec_ctx, &p->state_tracker, GRPC_CHANNEL_CONNECTING,
-            GRPC_ERROR_REF(error), "connecting_changed");
+        grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_CONNECTING,
+                                    GRPC_ERROR_REF(error),
+                                    "connecting_changed");
       }
       // Renew notification.
-      grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+      grpc_lb_subchannel_data_start_connectivity_watch(sd);
       break;
     }
     case GRPC_CHANNEL_SHUTDOWN: {
-      grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-      grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
-                                               "pf_candidate_shutdown");
+      grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+      grpc_lb_subchannel_data_unref_subchannel(sd, "pf_candidate_shutdown");
       // Advance to next subchannel and check its state.
       grpc_lb_subchannel_data* original_sd = sd;
       do {
@@ -531,24 +543,36 @@
       } while (sd->subchannel == nullptr && sd != original_sd);
       if (sd == original_sd) {
         grpc_lb_subchannel_list_unref_for_connectivity_watch(
-            exec_ctx, sd->subchannel_list, "pf_candidate_shutdown");
-        shutdown_locked(exec_ctx, p,
-                        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-                            "Pick first exhausted channels", &error, 1));
-        break;
+            sd->subchannel_list, "pf_exhausted_subchannels");
+        if (sd->subchannel_list == p->subchannel_list) {
+          grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_IDLE,
+                                      GRPC_ERROR_NONE,
+                                      "exhausted_subchannels+reresolve");
+          p->started_picking = false;
+          grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_pick_first_trace,
+                                       GRPC_ERROR_NONE);
+        }
+      } else {
+        if (sd->subchannel_list == p->subchannel_list) {
+          grpc_connectivity_state_set(
+              &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+              GRPC_ERROR_REF(error), "subchannel_failed");
+        }
+        // Reuses the connectivity refs from the previous watch.
+        grpc_lb_subchannel_data_start_connectivity_watch(sd);
       }
-      if (sd->subchannel_list == p->subchannel_list) {
-        grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                    GRPC_CHANNEL_TRANSIENT_FAILURE,
-                                    GRPC_ERROR_REF(error), "subchannel_failed");
-      }
-      // Reuses the connectivity refs from the previous watch.
-      grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
-      break;
     }
   }
 }
 
+static void pf_set_reresolve_closure_locked(
+    grpc_lb_policy* policy, grpc_closure* request_reresolution) {
+  pick_first_lb_policy* p = (pick_first_lb_policy*)policy;
+  GPR_ASSERT(!p->shutdown);
+  GPR_ASSERT(policy->request_reresolution == nullptr);
+  policy->request_reresolution = request_reresolution;
+}
+
 static const grpc_lb_policy_vtable pick_first_lb_policy_vtable = {
     pf_destroy,
     pf_shutdown_locked,
@@ -559,21 +583,21 @@
     pf_exit_idle_locked,
     pf_check_connectivity_locked,
     pf_notify_on_state_change_locked,
-    pf_update_locked};
+    pf_update_locked,
+    pf_set_reresolve_closure_locked};
 
 static void pick_first_factory_ref(grpc_lb_policy_factory* factory) {}
 
 static void pick_first_factory_unref(grpc_lb_policy_factory* factory) {}
 
-static grpc_lb_policy* create_pick_first(grpc_exec_ctx* exec_ctx,
-                                         grpc_lb_policy_factory* factory,
+static grpc_lb_policy* create_pick_first(grpc_lb_policy_factory* factory,
                                          grpc_lb_policy_args* args) {
   GPR_ASSERT(args->client_channel_factory != nullptr);
   pick_first_lb_policy* p = (pick_first_lb_policy*)gpr_zalloc(sizeof(*p));
   if (grpc_lb_pick_first_trace.enabled()) {
     gpr_log(GPR_DEBUG, "Pick First %p created.", (void*)p);
   }
-  pf_update_locked(exec_ctx, &p->base, args);
+  pf_update_locked(&p->base, args);
   grpc_lb_policy_init(&p->base, &pick_first_lb_policy_vtable, args->combiner);
   grpc_subchannel_index_ref();
   return &p->base;
diff --git a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
index 23a4cc4..b0c8401 100644
--- a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
@@ -20,9 +20,9 @@
  *
  * Before every pick, the \a get_next_ready_subchannel_index_locked function
  * returns the p->subchannel_list->subchannels index for next subchannel,
- * respecting the relative
- * order of the addresses provided upon creation or updates. Note however that
- * updates will start picking from the beginning of the updated list. */
+ * respecting the relative order of the addresses provided upon creation or
+ * updates. Note however that updates will start picking from the beginning of
+ * the updated list. */
 
 #include <string.h>
 
@@ -154,7 +154,7 @@
   }
 }
 
-static void rr_destroy(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void rr_destroy(grpc_lb_policy* pol) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] Destroying Round Robin policy at %p",
@@ -162,13 +162,14 @@
   }
   GPR_ASSERT(p->subchannel_list == nullptr);
   GPR_ASSERT(p->latest_pending_subchannel_list == nullptr);
-  grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
+  grpc_connectivity_state_destroy(&p->state_tracker);
   grpc_subchannel_index_unref();
   gpr_free(p);
 }
 
-static void shutdown_locked(grpc_exec_ctx* exec_ctx, round_robin_lb_policy* p,
-                            grpc_error* error) {
+static void rr_shutdown_locked(grpc_lb_policy* pol) {
+  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] Shutting down", p);
   }
@@ -177,33 +178,27 @@
   while ((pp = p->pending_picks) != nullptr) {
     p->pending_picks = pp->next;
     *pp->target = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(pp->on_complete, GRPC_ERROR_REF(error));
     gpr_free(pp);
   }
-  grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                              GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
-                              "rr_shutdown");
+  grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_SHUTDOWN,
+                              GRPC_ERROR_REF(error), "rr_shutdown");
   if (p->subchannel_list != nullptr) {
-    grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+    grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                "sl_shutdown_rr_shutdown");
     p->subchannel_list = nullptr;
   }
   if (p->latest_pending_subchannel_list != nullptr) {
     grpc_lb_subchannel_list_shutdown_and_unref(
-        exec_ctx, p->latest_pending_subchannel_list,
-        "sl_shutdown_pending_rr_shutdown");
+        p->latest_pending_subchannel_list, "sl_shutdown_pending_rr_shutdown");
     p->latest_pending_subchannel_list = nullptr;
   }
+  grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_round_robin_trace,
+                               GRPC_ERROR_CANCELLED);
   GRPC_ERROR_UNREF(error);
 }
 
-static void rr_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
-  shutdown_locked(exec_ctx, p,
-                  GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel Shutdown"));
-}
-
-static void rr_cancel_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static void rr_cancel_pick_locked(grpc_lb_policy* pol,
                                   grpc_connected_subchannel** target,
                                   grpc_error* error) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
@@ -213,7 +208,7 @@
     pending_pick* next = pp->next;
     if (pp->target == target) {
       *target = nullptr;
-      GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete,
+      GRPC_CLOSURE_SCHED(pp->on_complete,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick cancelled", &error, 1));
       gpr_free(pp);
@@ -226,7 +221,7 @@
   GRPC_ERROR_UNREF(error);
 }
 
-static void rr_cancel_picks_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static void rr_cancel_picks_locked(grpc_lb_policy* pol,
                                    uint32_t initial_metadata_flags_mask,
                                    uint32_t initial_metadata_flags_eq,
                                    grpc_error* error) {
@@ -238,7 +233,7 @@
     if ((pp->initial_metadata_flags & initial_metadata_flags_mask) ==
         initial_metadata_flags_eq) {
       *pp->target = nullptr;
-      GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete,
+      GRPC_CLOSURE_SCHED(pp->on_complete,
                          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Pick cancelled", &error, 1));
       gpr_free(pp);
@@ -251,25 +246,26 @@
   GRPC_ERROR_UNREF(error);
 }
 
-static void start_picking_locked(grpc_exec_ctx* exec_ctx,
-                                 round_robin_lb_policy* p) {
+static void start_picking_locked(round_robin_lb_policy* p) {
   p->started_picking = true;
   for (size_t i = 0; i < p->subchannel_list->num_subchannels; i++) {
-    grpc_lb_subchannel_list_ref_for_connectivity_watch(p->subchannel_list,
-                                                       "connectivity_watch");
-    grpc_lb_subchannel_data_start_connectivity_watch(
-        exec_ctx, &p->subchannel_list->subchannels[i]);
+    if (p->subchannel_list->subchannels[i].subchannel != nullptr) {
+      grpc_lb_subchannel_list_ref_for_connectivity_watch(p->subchannel_list,
+                                                         "connectivity_watch");
+      grpc_lb_subchannel_data_start_connectivity_watch(
+          &p->subchannel_list->subchannels[i]);
+    }
   }
 }
 
-static void rr_exit_idle_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol) {
+static void rr_exit_idle_locked(grpc_lb_policy* pol) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   if (!p->started_picking) {
-    start_picking_locked(exec_ctx, p);
+    start_picking_locked(p);
   }
 }
 
-static int rr_pick_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
+static int rr_pick_locked(grpc_lb_policy* pol,
                           const grpc_lb_policy_pick_args* pick_args,
                           grpc_connected_subchannel** target,
                           grpc_call_context_element* context, void** user_data,
@@ -306,7 +302,7 @@
   }
   /* no pick currently available. Save for later in list of pending picks */
   if (!p->started_picking) {
-    start_picking_locked(exec_ctx, p);
+    start_picking_locked(p);
   }
   pending_pick* pp = (pending_pick*)gpr_malloc(sizeof(*pp));
   pp->next = p->pending_picks;
@@ -346,75 +342,64 @@
 }
 
 /** Sets the policy's connectivity status based on that of the passed-in \a sd
- * (the grpc_lb_subchannel_data associted with the updated subchannel) and the
- * subchannel list \a sd belongs to (sd->subchannel_list). \a error will only be
- * used upon policy transition to TRANSIENT_FAILURE or SHUTDOWN. Returns the
- * connectivity status set. */
-static grpc_connectivity_state update_lb_connectivity_status_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd, grpc_error* error) {
+ * (the grpc_lb_subchannel_data associated with the updated subchannel) and the
+ * subchannel list \a sd belongs to (sd->subchannel_list). \a error will be used
+ * only if the policy transitions to state TRANSIENT_FAILURE. */
+static void update_lb_connectivity_status_locked(grpc_lb_subchannel_data* sd,
+                                                 grpc_error* error) {
   /* In priority order. The first rule to match terminates the search (ie, if we
    * are on rule n, all previous rules were unfulfilled).
    *
    * 1) RULE: ANY subchannel is READY => policy is READY.
-   *    CHECK: At least one subchannel is ready iff p->ready_list is NOT empty.
+   *    CHECK: subchannel_list->num_ready > 0.
    *
    * 2) RULE: ANY subchannel is CONNECTING => policy is CONNECTING.
    *    CHECK: sd->curr_connectivity_state == CONNECTING.
    *
-   * 3) RULE: ALL subchannels are SHUTDOWN => policy is SHUTDOWN.
-   *    CHECK: p->subchannel_list->num_shutdown ==
-   *           p->subchannel_list->num_subchannels.
+   * 3) RULE: ALL subchannels are SHUTDOWN => policy is IDLE (and requests
+   *          re-resolution).
+   *    CHECK: subchannel_list->num_shutdown ==
+   *           subchannel_list->num_subchannels.
    *
-   * 4) RULE: ALL subchannels are TRANSIENT_FAILURE => policy is
-   *    TRANSIENT_FAILURE.
-   *    CHECK: p->num_transient_failures == p->subchannel_list->num_subchannels.
-   *
-   * 5) RULE: ALL subchannels are IDLE => policy is IDLE.
-   *    CHECK: p->num_idle == p->subchannel_list->num_subchannels.
+   * 4) RULE: ALL subchannels are SHUTDOWN or TRANSIENT_FAILURE => policy is
+   *          TRANSIENT_FAILURE.
+   *    CHECK: subchannel_list->num_shutdown +
+   *             subchannel_list->num_transient_failures ==
+   *           subchannel_list->num_subchannels.
    */
-  grpc_connectivity_state new_state = sd->curr_connectivity_state;
+  // TODO(juanlishen): For rule 4, we may want to re-resolve instead.
   grpc_lb_subchannel_list* subchannel_list = sd->subchannel_list;
   round_robin_lb_policy* p = (round_robin_lb_policy*)subchannel_list->policy;
-  if (subchannel_list->num_ready > 0) { /* 1) READY */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_READY,
+  GPR_ASSERT(sd->curr_connectivity_state != GRPC_CHANNEL_IDLE);
+  if (subchannel_list->num_ready > 0) {
+    /* 1) READY */
+    grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_READY,
                                 GRPC_ERROR_NONE, "rr_ready");
-    new_state = GRPC_CHANNEL_READY;
-  } else if (sd->curr_connectivity_state ==
-             GRPC_CHANNEL_CONNECTING) { /* 2) CONNECTING */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                GRPC_CHANNEL_CONNECTING, GRPC_ERROR_NONE,
-                                "rr_connecting");
-    new_state = GRPC_CHANNEL_CONNECTING;
-  } else if (p->subchannel_list->num_shutdown ==
-             p->subchannel_list->num_subchannels) { /* 3) SHUTDOWN */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
-                                "rr_shutdown");
-    p->shutdown = true;
-    new_state = GRPC_CHANNEL_SHUTDOWN;
-    if (grpc_lb_round_robin_trace.enabled()) {
-      gpr_log(GPR_INFO,
-              "[RR %p] Shutting down: all subchannels have gone into shutdown",
-              (void*)p);
-    }
-  } else if (subchannel_list->num_transient_failures ==
-             p->subchannel_list->num_subchannels) { /* 4) TRANSIENT_FAILURE */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
+  } else if (sd->curr_connectivity_state == GRPC_CHANNEL_CONNECTING) {
+    /* 2) CONNECTING */
+    grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_CONNECTING,
+                                GRPC_ERROR_NONE, "rr_connecting");
+  } else if (subchannel_list->num_shutdown ==
+             subchannel_list->num_subchannels) {
+    /* 3) IDLE and re-resolve */
+    grpc_connectivity_state_set(&p->state_tracker, GRPC_CHANNEL_IDLE,
+                                GRPC_ERROR_NONE,
+                                "rr_exhausted_subchannels+reresolve");
+    p->started_picking = false;
+    grpc_lb_policy_try_reresolve(&p->base, &grpc_lb_round_robin_trace,
+                                 GRPC_ERROR_NONE);
+  } else if (subchannel_list->num_shutdown +
+                 subchannel_list->num_transient_failures ==
+             subchannel_list->num_subchannels) {
+    /* 4) TRANSIENT_FAILURE */
+    grpc_connectivity_state_set(&p->state_tracker,
                                 GRPC_CHANNEL_TRANSIENT_FAILURE,
                                 GRPC_ERROR_REF(error), "rr_transient_failure");
-    new_state = GRPC_CHANNEL_TRANSIENT_FAILURE;
-  } else if (subchannel_list->num_idle ==
-             p->subchannel_list->num_subchannels) { /* 5) IDLE */
-    grpc_connectivity_state_set(exec_ctx, &p->state_tracker, GRPC_CHANNEL_IDLE,
-                                GRPC_ERROR_NONE, "rr_idle");
-    new_state = GRPC_CHANNEL_IDLE;
   }
   GRPC_ERROR_UNREF(error);
-  return new_state;
 }
 
-static void rr_connectivity_changed_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void rr_connectivity_changed_locked(void* arg, grpc_error* error) {
   grpc_lb_subchannel_data* sd = (grpc_lb_subchannel_data*)arg;
   round_robin_lb_policy* p =
       (round_robin_lb_policy*)sd->subchannel_list->policy;
@@ -432,18 +417,18 @@
   }
   // If the policy is shutting down, unref and return.
   if (p->shutdown) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, "rr_shutdown");
-    grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "rr_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "rr_shutdown");
+    grpc_lb_subchannel_list_unref_for_connectivity_watch(sd->subchannel_list,
+                                                         "rr_shutdown");
     return;
   }
   // If the subchannel list is shutting down, stop watching.
   if (sd->subchannel_list->shutting_down || error == GRPC_ERROR_CANCELLED) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, "rr_sl_shutdown");
-    grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "rr_sl_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "rr_sl_shutdown");
+    grpc_lb_subchannel_list_unref_for_connectivity_watch(sd->subchannel_list,
+                                                         "rr_sl_shutdown");
     return;
   }
   // If we're still here, the notification must be for a subchannel in
@@ -454,21 +439,15 @@
   // state (which was set by the connectivity state watcher) to
   // curr_connectivity_state, which is what we use inside of the combiner.
   sd->curr_connectivity_state = sd->pending_connectivity_state_unsafe;
-  // Update state counters and determine new overall state.
+  // Update state counters and new overall state.
   update_state_counters_locked(sd);
-  const grpc_connectivity_state new_policy_connectivity_state =
-      update_lb_connectivity_status_locked(exec_ctx, sd, GRPC_ERROR_REF(error));
-  // If the sd's new state is SHUTDOWN, unref the subchannel, and if the new
-  // policy's state is SHUTDOWN, clean up.
+  update_lb_connectivity_status_locked(sd, GRPC_ERROR_REF(error));
+  // If the sd's new state is SHUTDOWN, unref the subchannel.
   if (sd->curr_connectivity_state == GRPC_CHANNEL_SHUTDOWN) {
-    grpc_lb_subchannel_data_stop_connectivity_watch(exec_ctx, sd);
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
-                                             "rr_connectivity_shutdown");
+    grpc_lb_subchannel_data_stop_connectivity_watch(sd);
+    grpc_lb_subchannel_data_unref_subchannel(sd, "rr_connectivity_shutdown");
     grpc_lb_subchannel_list_unref_for_connectivity_watch(
-        exec_ctx, sd->subchannel_list, "rr_connectivity_shutdown");
-    if (new_policy_connectivity_state == GRPC_CHANNEL_SHUTDOWN) {
-      shutdown_locked(exec_ctx, p, GRPC_ERROR_REF(error));
-    }
+        sd->subchannel_list, "rr_connectivity_shutdown");
   } else {  // sd not in SHUTDOWN
     if (sd->curr_connectivity_state == GRPC_CHANNEL_READY) {
       if (sd->connected_subchannel == nullptr) {
@@ -496,15 +475,15 @@
         }
         if (p->subchannel_list != nullptr) {
           // dispose of the current subchannel_list
-          grpc_lb_subchannel_list_shutdown_and_unref(
-              exec_ctx, p->subchannel_list, "sl_phase_out_shutdown");
+          grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
+                                                     "sl_phase_out_shutdown");
         }
         p->subchannel_list = p->latest_pending_subchannel_list;
         p->latest_pending_subchannel_list = nullptr;
       }
       /* at this point we know there's at least one suitable subchannel. Go
        * ahead and pick one and notify the pending suitors in
-       * p->pending_picks. This preemtively replicates rr_pick()'s actions. */
+       * p->pending_picks. This preemptively replicates rr_pick()'s actions. */
       const size_t next_ready_index = get_next_ready_subchannel_index_locked(p);
       GPR_ASSERT(next_ready_index < p->subchannel_list->num_subchannels);
       grpc_lb_subchannel_data* selected =
@@ -529,32 +508,31 @@
                   (void*)p, (void*)selected->subchannel,
                   (void*)p->subchannel_list, (unsigned long)next_ready_index);
         }
-        GRPC_CLOSURE_SCHED(exec_ctx, pp->on_complete, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(pp->on_complete, GRPC_ERROR_NONE);
         gpr_free(pp);
       }
     }
     // Renew notification.
-    grpc_lb_subchannel_data_start_connectivity_watch(exec_ctx, sd);
+    grpc_lb_subchannel_data_start_connectivity_watch(sd);
   }
 }
 
 static grpc_connectivity_state rr_check_connectivity_locked(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol, grpc_error** error) {
+    grpc_lb_policy* pol, grpc_error** error) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   return grpc_connectivity_state_get(&p->state_tracker, error);
 }
 
-static void rr_notify_on_state_change_locked(grpc_exec_ctx* exec_ctx,
-                                             grpc_lb_policy* pol,
+static void rr_notify_on_state_change_locked(grpc_lb_policy* pol,
                                              grpc_connectivity_state* current,
                                              grpc_closure* notify) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
-  grpc_connectivity_state_notify_on_state_change(exec_ctx, &p->state_tracker,
-                                                 current, notify);
+  grpc_connectivity_state_notify_on_state_change(&p->state_tracker, current,
+                                                 notify);
 }
 
-static void rr_ping_one_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* pol,
-                               grpc_closure* closure) {
+static void rr_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
+                               grpc_closure* on_ack) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
   const size_t next_ready_index = get_next_ready_subchannel_index_locked(p);
   if (next_ready_index < p->subchannel_list->num_subchannels) {
@@ -562,16 +540,17 @@
         &p->subchannel_list->subchannels[next_ready_index];
     grpc_connected_subchannel* target = GRPC_CONNECTED_SUBCHANNEL_REF(
         selected->connected_subchannel, "rr_ping");
-    grpc_connected_subchannel_ping(exec_ctx, target, closure);
-    GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, target, "rr_ping");
+    grpc_connected_subchannel_ping(target, on_initiate, on_ack);
+    GRPC_CONNECTED_SUBCHANNEL_UNREF(target, "rr_ping");
   } else {
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, closure,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Round Robin not connected"));
+    GRPC_CLOSURE_SCHED(on_initiate, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                        "Round Robin not connected"));
+    GRPC_CLOSURE_SCHED(on_ack, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                   "Round Robin not connected"));
   }
 }
 
-static void rr_update_locked(grpc_exec_ctx* exec_ctx, grpc_lb_policy* policy,
+static void rr_update_locked(grpc_lb_policy* policy,
                              const grpc_lb_policy_args* args) {
   round_robin_lb_policy* p = (round_robin_lb_policy*)policy;
   const grpc_arg* arg =
@@ -582,7 +561,7 @@
     // Otherwise, keep using the current subchannel list (ignore this update).
     if (p->subchannel_list == nullptr) {
       grpc_connectivity_state_set(
-          exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Missing update in args"),
           "rr_update_missing");
     }
@@ -594,15 +573,15 @@
             addresses->num_addresses);
   }
   grpc_lb_subchannel_list* subchannel_list = grpc_lb_subchannel_list_create(
-      exec_ctx, &p->base, &grpc_lb_round_robin_trace, addresses, args,
+      &p->base, &grpc_lb_round_robin_trace, addresses, args,
       rr_connectivity_changed_locked);
   if (subchannel_list->num_subchannels == 0) {
     grpc_connectivity_state_set(
-        exec_ctx, &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+        &p->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Empty update"),
         "rr_update_empty");
     if (p->subchannel_list != nullptr) {
-      grpc_lb_subchannel_list_shutdown_and_unref(exec_ctx, p->subchannel_list,
+      grpc_lb_subchannel_list_shutdown_and_unref(p->subchannel_list,
                                                  "sl_shutdown_empty_update");
     }
     p->subchannel_list = subchannel_list;  // empty list
@@ -618,7 +597,7 @@
                 (void*)subchannel_list);
       }
       grpc_lb_subchannel_list_shutdown_and_unref(
-          exec_ctx, p->latest_pending_subchannel_list, "sl_outdated");
+          p->latest_pending_subchannel_list, "sl_outdated");
     }
     p->latest_pending_subchannel_list = subchannel_list;
     for (size_t i = 0; i < subchannel_list->num_subchannels; ++i) {
@@ -629,19 +608,27 @@
       grpc_lb_subchannel_list_ref_for_connectivity_watch(subchannel_list,
                                                          "connectivity_watch");
       grpc_lb_subchannel_data_start_connectivity_watch(
-          exec_ctx, &subchannel_list->subchannels[i]);
+          &subchannel_list->subchannels[i]);
     }
   } else {
     // The policy isn't picking yet. Save the update for later, disposing of
     // previous version if any.
     if (p->subchannel_list != nullptr) {
       grpc_lb_subchannel_list_shutdown_and_unref(
-          exec_ctx, p->subchannel_list, "rr_update_before_started_picking");
+          p->subchannel_list, "rr_update_before_started_picking");
     }
     p->subchannel_list = subchannel_list;
   }
 }
 
+static void rr_set_reresolve_closure_locked(
+    grpc_lb_policy* policy, grpc_closure* request_reresolution) {
+  round_robin_lb_policy* p = (round_robin_lb_policy*)policy;
+  GPR_ASSERT(!p->shutdown);
+  GPR_ASSERT(policy->request_reresolution == nullptr);
+  policy->request_reresolution = request_reresolution;
+}
+
 static const grpc_lb_policy_vtable round_robin_lb_policy_vtable = {
     rr_destroy,
     rr_shutdown_locked,
@@ -652,14 +639,14 @@
     rr_exit_idle_locked,
     rr_check_connectivity_locked,
     rr_notify_on_state_change_locked,
-    rr_update_locked};
+    rr_update_locked,
+    rr_set_reresolve_closure_locked};
 
 static void round_robin_factory_ref(grpc_lb_policy_factory* factory) {}
 
 static void round_robin_factory_unref(grpc_lb_policy_factory* factory) {}
 
-static grpc_lb_policy* round_robin_create(grpc_exec_ctx* exec_ctx,
-                                          grpc_lb_policy_factory* factory,
+static grpc_lb_policy* round_robin_create(grpc_lb_policy_factory* factory,
                                           grpc_lb_policy_args* args) {
   GPR_ASSERT(args->client_channel_factory != nullptr);
   round_robin_lb_policy* p = (round_robin_lb_policy*)gpr_zalloc(sizeof(*p));
@@ -667,7 +654,7 @@
   grpc_subchannel_index_ref();
   grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
                                "round_robin");
-  rr_update_locked(exec_ctx, &p->base, args);
+  rr_update_locked(&p->base, args);
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] Created with %lu subchannels", (void*)p,
             (unsigned long)p->subchannel_list->num_subchannels);
diff --git a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
index b6fce4d..a3b4c8e 100644
--- a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
@@ -28,8 +28,7 @@
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/transport/connectivity_state.h"
 
-void grpc_lb_subchannel_data_unref_subchannel(grpc_exec_ctx* exec_ctx,
-                                              grpc_lb_subchannel_data* sd,
+void grpc_lb_subchannel_data_unref_subchannel(grpc_lb_subchannel_data* sd,
                                               const char* reason) {
   if (sd->subchannel != nullptr) {
     if (sd->subchannel_list->tracer->enabled()) {
@@ -41,23 +40,22 @@
               (size_t)(sd - sd->subchannel_list->subchannels),
               sd->subchannel_list->num_subchannels, sd->subchannel);
     }
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, reason);
+    GRPC_SUBCHANNEL_UNREF(sd->subchannel, reason);
     sd->subchannel = nullptr;
     if (sd->connected_subchannel != nullptr) {
-      GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, sd->connected_subchannel,
-                                      reason);
+      GRPC_CONNECTED_SUBCHANNEL_UNREF(sd->connected_subchannel, reason);
       sd->connected_subchannel = nullptr;
     }
     if (sd->user_data != nullptr) {
       GPR_ASSERT(sd->user_data_vtable != nullptr);
-      sd->user_data_vtable->destroy(exec_ctx, sd->user_data);
+      sd->user_data_vtable->destroy(sd->user_data);
       sd->user_data = nullptr;
     }
   }
 }
 
 void grpc_lb_subchannel_data_start_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd) {
+    grpc_lb_subchannel_data* sd) {
   if (sd->subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG,
             "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR
@@ -69,13 +67,13 @@
   }
   sd->connectivity_notification_pending = true;
   grpc_subchannel_notify_on_state_change(
-      exec_ctx, sd->subchannel, sd->subchannel_list->policy->interested_parties,
+      sd->subchannel, sd->subchannel_list->policy->interested_parties,
       &sd->pending_connectivity_state_unsafe,
       &sd->connectivity_changed_closure);
 }
 
 void grpc_lb_subchannel_data_stop_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd) {
+    grpc_lb_subchannel_data* sd) {
   if (sd->subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG,
             "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR
@@ -90,7 +88,7 @@
 }
 
 grpc_lb_subchannel_list* grpc_lb_subchannel_list_create(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* p, grpc_core::TraceFlag* tracer,
+    grpc_lb_policy* p, grpc_core::TraceFlag* tracer,
     const grpc_lb_addresses* addresses, const grpc_lb_policy_args* args,
     grpc_iomgr_cb_func connectivity_changed_cb) {
   grpc_lb_subchannel_list* subchannel_list =
@@ -124,8 +122,8 @@
     gpr_free(addr_arg.value.string);
     sc_args.args = new_args;
     grpc_subchannel* subchannel = grpc_client_channel_factory_create_subchannel(
-        exec_ctx, args->client_channel_factory, &sc_args);
-    grpc_channel_args_destroy(exec_ctx, new_args);
+        args->client_channel_factory, &sc_args);
+    grpc_channel_args_destroy(new_args);
     if (subchannel == nullptr) {
       // Subchannel could not be created.
       if (tracer->enabled()) {
@@ -172,8 +170,7 @@
   return subchannel_list;
 }
 
-static void subchannel_list_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_lb_subchannel_list* subchannel_list) {
+static void subchannel_list_destroy(grpc_lb_subchannel_list* subchannel_list) {
   if (subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG, "[%s %p] Destroying subchannel_list %p",
             subchannel_list->tracer->name(), subchannel_list->policy,
@@ -181,8 +178,7 @@
   }
   for (size_t i = 0; i < subchannel_list->num_subchannels; i++) {
     grpc_lb_subchannel_data* sd = &subchannel_list->subchannels[i];
-    grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd,
-                                             "subchannel_list_destroy");
+    grpc_lb_subchannel_data_unref_subchannel(sd, "subchannel_list_destroy");
   }
   gpr_free(subchannel_list->subchannels);
   gpr_free(subchannel_list);
@@ -200,8 +196,7 @@
   }
 }
 
-void grpc_lb_subchannel_list_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_lb_subchannel_list* subchannel_list,
+void grpc_lb_subchannel_list_unref(grpc_lb_subchannel_list* subchannel_list,
                                    const char* reason) {
   const bool done = gpr_unref(&subchannel_list->refcount);
   if (subchannel_list->tracer->enabled()) {
@@ -212,7 +207,7 @@
             reason);
   }
   if (done) {
-    subchannel_list_destroy(exec_ctx, subchannel_list);
+    subchannel_list_destroy(subchannel_list);
   }
 }
 
@@ -223,14 +218,13 @@
 }
 
 void grpc_lb_subchannel_list_unref_for_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_list* subchannel_list,
-    const char* reason) {
-  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, subchannel_list->policy, reason);
-  grpc_lb_subchannel_list_unref(exec_ctx, subchannel_list, reason);
+    grpc_lb_subchannel_list* subchannel_list, const char* reason) {
+  GRPC_LB_POLICY_WEAK_UNREF(subchannel_list->policy, reason);
+  grpc_lb_subchannel_list_unref(subchannel_list, reason);
 }
 
 static void subchannel_data_cancel_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd, const char* reason) {
+    grpc_lb_subchannel_data* sd, const char* reason) {
   if (sd->subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG,
             "[%s %p] subchannel list %p index %" PRIuPTR " of %" PRIuPTR
@@ -240,14 +234,12 @@
             (size_t)(sd - sd->subchannel_list->subchannels),
             sd->subchannel_list->num_subchannels, sd->subchannel, reason);
   }
-  grpc_subchannel_notify_on_state_change(exec_ctx, sd->subchannel, nullptr,
-                                         nullptr,
+  grpc_subchannel_notify_on_state_change(sd->subchannel, nullptr, nullptr,
                                          &sd->connectivity_changed_closure);
 }
 
 void grpc_lb_subchannel_list_shutdown_and_unref(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_list* subchannel_list,
-    const char* reason) {
+    grpc_lb_subchannel_list* subchannel_list, const char* reason) {
   if (subchannel_list->tracer->enabled()) {
     gpr_log(GPR_DEBUG, "[%s %p] Shutting down subchannel_list %p (%s)",
             subchannel_list->tracer->name(), subchannel_list->policy,
@@ -261,10 +253,10 @@
     // the callback is responsible for unreffing the subchannel.
     // Otherwise, unref the subchannel directly.
     if (sd->connectivity_notification_pending) {
-      subchannel_data_cancel_connectivity_watch(exec_ctx, sd, reason);
+      subchannel_data_cancel_connectivity_watch(sd, reason);
     } else if (sd->subchannel != nullptr) {
-      grpc_lb_subchannel_data_unref_subchannel(exec_ctx, sd, reason);
+      grpc_lb_subchannel_data_unref_subchannel(sd, reason);
     }
   }
-  grpc_lb_subchannel_list_unref(exec_ctx, subchannel_list, reason);
+  grpc_lb_subchannel_list_unref(subchannel_list, reason);
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h
index e3e5eba..0f8cea9 100644
--- a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h
+++ b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.h
@@ -65,8 +65,7 @@
 } grpc_lb_subchannel_data;
 
 /// Unrefs the subchannel contained in sd.
-void grpc_lb_subchannel_data_unref_subchannel(grpc_exec_ctx* exec_ctx,
-                                              grpc_lb_subchannel_data* sd,
+void grpc_lb_subchannel_data_unref_subchannel(grpc_lb_subchannel_data* sd,
                                               const char* reason);
 
 /// Starts watching the connectivity state of the subchannel.
@@ -74,11 +73,11 @@
 /// grpc_lb_subchannel_data_stop_connectivity_watch() or again call
 /// grpc_lb_subchannel_data_start_connectivity_watch().
 void grpc_lb_subchannel_data_start_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd);
+    grpc_lb_subchannel_data* sd);
 
 /// Stops watching the connectivity state of the subchannel.
 void grpc_lb_subchannel_data_stop_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_data* sd);
+    grpc_lb_subchannel_data* sd);
 
 struct grpc_lb_subchannel_list {
   /** backpointer to owning policy */
@@ -117,15 +116,14 @@
 };
 
 grpc_lb_subchannel_list* grpc_lb_subchannel_list_create(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy* p, grpc_core::TraceFlag* tracer,
+    grpc_lb_policy* p, grpc_core::TraceFlag* tracer,
     const grpc_lb_addresses* addresses, const grpc_lb_policy_args* args,
     grpc_iomgr_cb_func connectivity_changed_cb);
 
 void grpc_lb_subchannel_list_ref(grpc_lb_subchannel_list* subchannel_list,
                                  const char* reason);
 
-void grpc_lb_subchannel_list_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_lb_subchannel_list* subchannel_list,
+void grpc_lb_subchannel_list_unref(grpc_lb_subchannel_list* subchannel_list,
                                    const char* reason);
 
 /// Takes and releases refs needed for a connectivity notification.
@@ -133,13 +131,11 @@
 void grpc_lb_subchannel_list_ref_for_connectivity_watch(
     grpc_lb_subchannel_list* subchannel_list, const char* reason);
 void grpc_lb_subchannel_list_unref_for_connectivity_watch(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_list* subchannel_list,
-    const char* reason);
+    grpc_lb_subchannel_list* subchannel_list, const char* reason);
 
 /// Mark subchannel_list as discarded. Unsubscribes all its subchannels. The
 /// connectivity state notification callback will ultimately unref it.
 void grpc_lb_subchannel_list_shutdown_and_unref(
-    grpc_exec_ctx* exec_ctx, grpc_lb_subchannel_list* subchannel_list,
-    const char* reason);
+    grpc_lb_subchannel_list* subchannel_list, const char* reason);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_SUBCHANNEL_LIST_H */
diff --git a/src/core/ext/filters/client_channel/lb_policy_factory.cc b/src/core/ext/filters/client_channel/lb_policy_factory.cc
index d43f9fd..dbf69fd 100644
--- a/src/core/ext/filters/client_channel/lb_policy_factory.cc
+++ b/src/core/ext/filters/client_channel/lb_policy_factory.cc
@@ -112,13 +112,11 @@
   return 0;
 }
 
-void grpc_lb_addresses_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_lb_addresses* addresses) {
+void grpc_lb_addresses_destroy(grpc_lb_addresses* addresses) {
   for (size_t i = 0; i < addresses->num_addresses; ++i) {
     gpr_free(addresses->addresses[i].balancer_name);
     if (addresses->addresses[i].user_data != nullptr) {
-      addresses->user_data_vtable->destroy(exec_ctx,
-                                           addresses->addresses[i].user_data);
+      addresses->user_data_vtable->destroy(addresses->addresses[i].user_data);
     }
   }
   gpr_free(addresses->addresses);
@@ -128,8 +126,8 @@
 static void* lb_addresses_copy(void* addresses) {
   return grpc_lb_addresses_copy((grpc_lb_addresses*)addresses);
 }
-static void lb_addresses_destroy(grpc_exec_ctx* exec_ctx, void* addresses) {
-  grpc_lb_addresses_destroy(exec_ctx, (grpc_lb_addresses*)addresses);
+static void lb_addresses_destroy(void* addresses) {
+  grpc_lb_addresses_destroy((grpc_lb_addresses*)addresses);
 }
 static int lb_addresses_cmp(void* addresses1, void* addresses2) {
   return grpc_lb_addresses_cmp((grpc_lb_addresses*)addresses1,
@@ -162,8 +160,7 @@
 }
 
 grpc_lb_policy* grpc_lb_policy_factory_create_lb_policy(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy_factory* factory,
-    grpc_lb_policy_args* args) {
+    grpc_lb_policy_factory* factory, grpc_lb_policy_args* args) {
   if (factory == nullptr) return nullptr;
-  return factory->vtable->create_lb_policy(exec_ctx, factory, args);
+  return factory->vtable->create_lb_policy(factory, args);
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy_factory.h b/src/core/ext/filters/client_channel/lb_policy_factory.h
index 8f6d8c1..9da231b 100644
--- a/src/core/ext/filters/client_channel/lb_policy_factory.h
+++ b/src/core/ext/filters/client_channel/lb_policy_factory.h
@@ -50,7 +50,7 @@
 
 typedef struct grpc_lb_user_data_vtable {
   void* (*copy)(void*);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, void*);
+  void (*destroy)(void*);
   int (*cmp)(void*, void*);
 } grpc_lb_user_data_vtable;
 
@@ -91,8 +91,7 @@
                           const grpc_lb_addresses* addresses2);
 
 /** Destroys \a addresses. */
-void grpc_lb_addresses_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_lb_addresses* addresses);
+void grpc_lb_addresses_destroy(grpc_lb_addresses* addresses);
 
 /** Returns a channel arg containing \a addresses. */
 grpc_arg grpc_lb_addresses_create_channel_arg(
@@ -114,8 +113,7 @@
   void (*unref)(grpc_lb_policy_factory* factory);
 
   /** Implementation of grpc_lb_policy_factory_create_lb_policy */
-  grpc_lb_policy* (*create_lb_policy)(grpc_exec_ctx* exec_ctx,
-                                      grpc_lb_policy_factory* factory,
+  grpc_lb_policy* (*create_lb_policy)(grpc_lb_policy_factory* factory,
                                       grpc_lb_policy_args* args);
 
   /** Name for the LB policy this factory implements */
@@ -127,7 +125,6 @@
 
 /** Create a lb_policy instance. */
 grpc_lb_policy* grpc_lb_policy_factory_create_lb_policy(
-    grpc_exec_ctx* exec_ctx, grpc_lb_policy_factory* factory,
-    grpc_lb_policy_args* args);
+    grpc_lb_policy_factory* factory, grpc_lb_policy_args* args);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_FACTORY_H */
diff --git a/src/core/ext/filters/client_channel/lb_policy_registry.cc b/src/core/ext/filters/client_channel/lb_policy_registry.cc
index 6e710e8..edd0330 100644
--- a/src/core/ext/filters/client_channel/lb_policy_registry.cc
+++ b/src/core/ext/filters/client_channel/lb_policy_registry.cc
@@ -61,10 +61,10 @@
   return nullptr;
 }
 
-grpc_lb_policy* grpc_lb_policy_create(grpc_exec_ctx* exec_ctx, const char* name,
+grpc_lb_policy* grpc_lb_policy_create(const char* name,
                                       grpc_lb_policy_args* args) {
   grpc_lb_policy_factory* factory = lookup_factory(name);
   grpc_lb_policy* lb_policy =
-      grpc_lb_policy_factory_create_lb_policy(exec_ctx, factory, args);
+      grpc_lb_policy_factory_create_lb_policy(factory, args);
   return lb_policy;
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy_registry.h b/src/core/ext/filters/client_channel/lb_policy_registry.h
index acddc90..5aff793 100644
--- a/src/core/ext/filters/client_channel/lb_policy_registry.h
+++ b/src/core/ext/filters/client_channel/lb_policy_registry.h
@@ -34,7 +34,7 @@
  *
  * If \a name is NULL, the default factory from \a grpc_lb_policy_registry_init
  * will be returned. */
-grpc_lb_policy* grpc_lb_policy_create(grpc_exec_ctx* exec_ctx, const char* name,
+grpc_lb_policy* grpc_lb_policy_create(const char* name,
                                       grpc_lb_policy_args* args);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H */
diff --git a/src/core/ext/filters/client_channel/proxy_mapper.cc b/src/core/ext/filters/client_channel/proxy_mapper.cc
index c6ea5fc..be85cfc 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper.cc
+++ b/src/core/ext/filters/client_channel/proxy_mapper.cc
@@ -23,24 +23,22 @@
   mapper->vtable = vtable;
 }
 
-bool grpc_proxy_mapper_map_name(grpc_exec_ctx* exec_ctx,
-                                grpc_proxy_mapper* mapper,
+bool grpc_proxy_mapper_map_name(grpc_proxy_mapper* mapper,
                                 const char* server_uri,
                                 const grpc_channel_args* args,
                                 char** name_to_resolve,
                                 grpc_channel_args** new_args) {
-  return mapper->vtable->map_name(exec_ctx, mapper, server_uri, args,
-                                  name_to_resolve, new_args);
+  return mapper->vtable->map_name(mapper, server_uri, args, name_to_resolve,
+                                  new_args);
 }
 
-bool grpc_proxy_mapper_map_address(grpc_exec_ctx* exec_ctx,
-                                   grpc_proxy_mapper* mapper,
+bool grpc_proxy_mapper_map_address(grpc_proxy_mapper* mapper,
                                    const grpc_resolved_address* address,
                                    const grpc_channel_args* args,
                                    grpc_resolved_address** new_address,
                                    grpc_channel_args** new_args) {
-  return mapper->vtable->map_address(exec_ctx, mapper, address, args,
-                                     new_address, new_args);
+  return mapper->vtable->map_address(mapper, address, args, new_address,
+                                     new_args);
 }
 
 void grpc_proxy_mapper_destroy(grpc_proxy_mapper* mapper) {
diff --git a/src/core/ext/filters/client_channel/proxy_mapper.h b/src/core/ext/filters/client_channel/proxy_mapper.h
index a13861c..ce3e65e 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper.h
+++ b/src/core/ext/filters/client_channel/proxy_mapper.h
@@ -32,14 +32,14 @@
   /// If no proxy is needed, returns false.
   /// Otherwise, sets \a name_to_resolve, optionally sets \a new_args,
   /// and returns true.
-  bool (*map_name)(grpc_exec_ctx* exec_ctx, grpc_proxy_mapper* mapper,
-                   const char* server_uri, const grpc_channel_args* args,
-                   char** name_to_resolve, grpc_channel_args** new_args);
+  bool (*map_name)(grpc_proxy_mapper* mapper, const char* server_uri,
+                   const grpc_channel_args* args, char** name_to_resolve,
+                   grpc_channel_args** new_args);
   /// Determines the proxy address to use to contact \a address.
   /// If no proxy is needed, returns false.
   /// Otherwise, sets \a new_address, optionally sets \a new_args, and
   /// returns true.
-  bool (*map_address)(grpc_exec_ctx* exec_ctx, grpc_proxy_mapper* mapper,
+  bool (*map_address)(grpc_proxy_mapper* mapper,
                       const grpc_resolved_address* address,
                       const grpc_channel_args* args,
                       grpc_resolved_address** new_address,
@@ -55,15 +55,13 @@
 void grpc_proxy_mapper_init(const grpc_proxy_mapper_vtable* vtable,
                             grpc_proxy_mapper* mapper);
 
-bool grpc_proxy_mapper_map_name(grpc_exec_ctx* exec_ctx,
-                                grpc_proxy_mapper* mapper,
+bool grpc_proxy_mapper_map_name(grpc_proxy_mapper* mapper,
                                 const char* server_uri,
                                 const grpc_channel_args* args,
                                 char** name_to_resolve,
                                 grpc_channel_args** new_args);
 
-bool grpc_proxy_mapper_map_address(grpc_exec_ctx* exec_ctx,
-                                   grpc_proxy_mapper* mapper,
+bool grpc_proxy_mapper_map_address(grpc_proxy_mapper* mapper,
                                    const grpc_resolved_address* address,
                                    const grpc_channel_args* args,
                                    grpc_resolved_address** new_address,
diff --git a/src/core/ext/filters/client_channel/proxy_mapper_registry.cc b/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
index 09967ee..51778a2 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
+++ b/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
@@ -46,14 +46,13 @@
   ++list->num_mappers;
 }
 
-static bool grpc_proxy_mapper_list_map_name(grpc_exec_ctx* exec_ctx,
-                                            grpc_proxy_mapper_list* list,
+static bool grpc_proxy_mapper_list_map_name(grpc_proxy_mapper_list* list,
                                             const char* server_uri,
                                             const grpc_channel_args* args,
                                             char** name_to_resolve,
                                             grpc_channel_args** new_args) {
   for (size_t i = 0; i < list->num_mappers; ++i) {
-    if (grpc_proxy_mapper_map_name(exec_ctx, list->list[i], server_uri, args,
+    if (grpc_proxy_mapper_map_name(list->list[i], server_uri, args,
                                    name_to_resolve, new_args)) {
       return true;
     }
@@ -62,12 +61,12 @@
 }
 
 static bool grpc_proxy_mapper_list_map_address(
-    grpc_exec_ctx* exec_ctx, grpc_proxy_mapper_list* list,
-    const grpc_resolved_address* address, const grpc_channel_args* args,
-    grpc_resolved_address** new_address, grpc_channel_args** new_args) {
+    grpc_proxy_mapper_list* list, const grpc_resolved_address* address,
+    const grpc_channel_args* args, grpc_resolved_address** new_address,
+    grpc_channel_args** new_args) {
   for (size_t i = 0; i < list->num_mappers; ++i) {
-    if (grpc_proxy_mapper_map_address(exec_ctx, list->list[i], address, args,
-                                      new_address, new_args)) {
+    if (grpc_proxy_mapper_map_address(list->list[i], address, args, new_address,
+                                      new_args)) {
       return true;
     }
   }
@@ -105,20 +104,17 @@
   grpc_proxy_mapper_list_register(&g_proxy_mapper_list, at_start, mapper);
 }
 
-bool grpc_proxy_mappers_map_name(grpc_exec_ctx* exec_ctx,
-                                 const char* server_uri,
+bool grpc_proxy_mappers_map_name(const char* server_uri,
                                  const grpc_channel_args* args,
                                  char** name_to_resolve,
                                  grpc_channel_args** new_args) {
-  return grpc_proxy_mapper_list_map_name(exec_ctx, &g_proxy_mapper_list,
-                                         server_uri, args, name_to_resolve,
-                                         new_args);
+  return grpc_proxy_mapper_list_map_name(&g_proxy_mapper_list, server_uri, args,
+                                         name_to_resolve, new_args);
 }
-bool grpc_proxy_mappers_map_address(grpc_exec_ctx* exec_ctx,
-                                    const grpc_resolved_address* address,
+bool grpc_proxy_mappers_map_address(const grpc_resolved_address* address,
                                     const grpc_channel_args* args,
                                     grpc_resolved_address** new_address,
                                     grpc_channel_args** new_args) {
-  return grpc_proxy_mapper_list_map_address(
-      exec_ctx, &g_proxy_mapper_list, address, args, new_address, new_args);
+  return grpc_proxy_mapper_list_map_address(&g_proxy_mapper_list, address, args,
+                                            new_address, new_args);
 }
diff --git a/src/core/ext/filters/client_channel/proxy_mapper_registry.h b/src/core/ext/filters/client_channel/proxy_mapper_registry.h
index 99e54d1..2ad6c04 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper_registry.h
+++ b/src/core/ext/filters/client_channel/proxy_mapper_registry.h
@@ -29,14 +29,12 @@
 /// the list.  Otherwise, it will be added to the end.
 void grpc_proxy_mapper_register(bool at_start, grpc_proxy_mapper* mapper);
 
-bool grpc_proxy_mappers_map_name(grpc_exec_ctx* exec_ctx,
-                                 const char* server_uri,
+bool grpc_proxy_mappers_map_name(const char* server_uri,
                                  const grpc_channel_args* args,
                                  char** name_to_resolve,
                                  grpc_channel_args** new_args);
 
-bool grpc_proxy_mappers_map_address(grpc_exec_ctx* exec_ctx,
-                                    const grpc_resolved_address* address,
+bool grpc_proxy_mappers_map_address(const grpc_resolved_address* address,
                                     const grpc_channel_args* args,
                                     grpc_resolved_address** new_address,
                                     grpc_channel_args** new_args);
diff --git a/src/core/ext/filters/client_channel/resolver.cc b/src/core/ext/filters/client_channel/resolver.cc
index c16b151..ff54e71 100644
--- a/src/core/ext/filters/client_channel/resolver.cc
+++ b/src/core/ext/filters/client_channel/resolver.cc
@@ -46,8 +46,8 @@
 }
 
 #ifndef NDEBUG
-void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
-                         const char* file, int line, const char* reason) {
+void grpc_resolver_unref(grpc_resolver* resolver, const char* file, int line,
+                         const char* reason) {
   if (grpc_trace_resolver_refcount.enabled()) {
     gpr_atm old_refs = gpr_atm_no_barrier_load(&resolver->refs.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -55,27 +55,25 @@
             old_refs, old_refs - 1, reason);
   }
 #else
-void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver) {
+void grpc_resolver_unref(grpc_resolver* resolver) {
 #endif
   if (gpr_unref(&resolver->refs)) {
     grpc_combiner* combiner = resolver->combiner;
-    resolver->vtable->destroy(exec_ctx, resolver);
-    GRPC_COMBINER_UNREF(exec_ctx, combiner, "resolver");
+    resolver->vtable->destroy(resolver);
+    GRPC_COMBINER_UNREF(combiner, "resolver");
   }
 }
 
-void grpc_resolver_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_resolver* resolver) {
-  resolver->vtable->shutdown_locked(exec_ctx, resolver);
+void grpc_resolver_shutdown_locked(grpc_resolver* resolver) {
+  resolver->vtable->shutdown_locked(resolver);
 }
 
-void grpc_resolver_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                            grpc_resolver* resolver) {
-  resolver->vtable->channel_saw_error_locked(exec_ctx, resolver);
+void grpc_resolver_channel_saw_error_locked(grpc_resolver* resolver) {
+  resolver->vtable->channel_saw_error_locked(resolver);
 }
 
-void grpc_resolver_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
+void grpc_resolver_next_locked(grpc_resolver* resolver,
                                grpc_channel_args** result,
                                grpc_closure* on_complete) {
-  resolver->vtable->next_locked(exec_ctx, resolver, result, on_complete);
+  resolver->vtable->next_locked(resolver, result, on_complete);
 }
diff --git a/src/core/ext/filters/client_channel/resolver.h b/src/core/ext/filters/client_channel/resolver.h
index 4e8cfbe..f6a4af0 100644
--- a/src/core/ext/filters/client_channel/resolver.h
+++ b/src/core/ext/filters/client_channel/resolver.h
@@ -35,43 +35,40 @@
 };
 
 struct grpc_resolver_vtable {
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver);
-  void (*shutdown_locked)(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver);
-  void (*channel_saw_error_locked)(grpc_exec_ctx* exec_ctx,
-                                   grpc_resolver* resolver);
-  void (*next_locked)(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
-                      grpc_channel_args** result, grpc_closure* on_complete);
+  void (*destroy)(grpc_resolver* resolver);
+  void (*shutdown_locked)(grpc_resolver* resolver);
+  void (*channel_saw_error_locked)(grpc_resolver* resolver);
+  void (*next_locked)(grpc_resolver* resolver, grpc_channel_args** result,
+                      grpc_closure* on_complete);
 };
 
 #ifndef NDEBUG
 #define GRPC_RESOLVER_REF(p, r) grpc_resolver_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_RESOLVER_UNREF(e, p, r) \
-  grpc_resolver_unref((e), (p), __FILE__, __LINE__, (r))
+#define GRPC_RESOLVER_UNREF(p, r) \
+  grpc_resolver_unref((p), __FILE__, __LINE__, (r))
 void grpc_resolver_ref(grpc_resolver* policy, const char* file, int line,
                        const char* reason);
-void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* policy,
-                         const char* file, int line, const char* reason);
+void grpc_resolver_unref(grpc_resolver* policy, const char* file, int line,
+                         const char* reason);
 #else
 #define GRPC_RESOLVER_REF(p, r) grpc_resolver_ref((p))
-#define GRPC_RESOLVER_UNREF(e, p, r) grpc_resolver_unref((e), (p))
+#define GRPC_RESOLVER_UNREF(p, r) grpc_resolver_unref((p))
 void grpc_resolver_ref(grpc_resolver* policy);
-void grpc_resolver_unref(grpc_exec_ctx* exec_ctx, grpc_resolver* policy);
+void grpc_resolver_unref(grpc_resolver* policy);
 #endif
 
 void grpc_resolver_init(grpc_resolver* resolver,
                         const grpc_resolver_vtable* vtable,
                         grpc_combiner* combiner);
 
-void grpc_resolver_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_resolver* resolver);
+void grpc_resolver_shutdown_locked(grpc_resolver* resolver);
 
 /** Notification that the channel has seen an error on some address.
     Can be used as a hint that re-resolution is desirable soon.
 
     Must be called from the combiner passed as a resolver_arg at construction
     time.*/
-void grpc_resolver_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                            grpc_resolver* resolver);
+void grpc_resolver_channel_saw_error_locked(grpc_resolver* resolver);
 
 /** Get the next result from the resolver.  Expected to set \a *result with
     new channel args and then schedule \a on_complete for execution.
@@ -81,7 +78,7 @@
 
     Must be called from the combiner passed as a resolver_arg at construction
     time.*/
-void grpc_resolver_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
+void grpc_resolver_next_locked(grpc_resolver* resolver,
                                grpc_channel_args** result,
                                grpc_closure* on_complete);
 
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
index 3a16b34..4ec4477 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
@@ -97,17 +97,14 @@
   char* service_config_json;
 } ares_dns_resolver;
 
-static void dns_ares_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
+static void dns_ares_destroy(grpc_resolver* r);
 
-static void dns_ares_start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                            ares_dns_resolver* r);
-static void dns_ares_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                              ares_dns_resolver* r);
+static void dns_ares_start_resolving_locked(ares_dns_resolver* r);
+static void dns_ares_maybe_finish_next_locked(ares_dns_resolver* r);
 
-static void dns_ares_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
-static void dns_ares_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_resolver* r);
-static void dns_ares_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r,
+static void dns_ares_shutdown_locked(grpc_resolver* r);
+static void dns_ares_channel_saw_error_locked(grpc_resolver* r);
+static void dns_ares_next_locked(grpc_resolver* r,
                                  grpc_channel_args** target_result,
                                  grpc_closure* on_complete);
 
@@ -115,43 +112,39 @@
     dns_ares_destroy, dns_ares_shutdown_locked,
     dns_ares_channel_saw_error_locked, dns_ares_next_locked};
 
-static void dns_ares_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_resolver* resolver) {
+static void dns_ares_shutdown_locked(grpc_resolver* resolver) {
   ares_dns_resolver* r = (ares_dns_resolver*)resolver;
   if (r->have_retry_timer) {
-    grpc_timer_cancel(exec_ctx, &r->retry_timer);
+    grpc_timer_cancel(&r->retry_timer);
   }
   if (r->pending_request != nullptr) {
-    grpc_cancel_ares_request(exec_ctx, r->pending_request);
+    grpc_cancel_ares_request(r->pending_request);
   }
   if (r->next_completion != nullptr) {
     *r->target_result = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, r->next_completion,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                               "Resolver Shutdown"));
     r->next_completion = nullptr;
   }
 }
 
-static void dns_ares_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_resolver* resolver) {
+static void dns_ares_channel_saw_error_locked(grpc_resolver* resolver) {
   ares_dns_resolver* r = (ares_dns_resolver*)resolver;
   if (!r->resolving) {
     grpc_backoff_reset(&r->backoff_state);
-    dns_ares_start_resolving_locked(exec_ctx, r);
+    dns_ares_start_resolving_locked(r);
   }
 }
 
-static void dns_ares_on_retry_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void dns_ares_on_retry_timer_locked(void* arg, grpc_error* error) {
   ares_dns_resolver* r = (ares_dns_resolver*)arg;
   r->have_retry_timer = false;
   if (error == GRPC_ERROR_NONE) {
     if (!r->resolving) {
-      dns_ares_start_resolving_locked(exec_ctx, r);
+      dns_ares_start_resolving_locked(r);
     }
   }
-  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "retry-timer");
+  GRPC_RESOLVER_UNREF(&r->base, "retry-timer");
 }
 
 static bool value_in_json_array(grpc_json* array, const char* value) {
@@ -226,8 +219,7 @@
   return service_config;
 }
 
-static void dns_ares_on_resolved_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void dns_ares_on_resolved_locked(void* arg, grpc_error* error) {
   ares_dns_resolver* r = (ares_dns_resolver*)arg;
   grpc_channel_args* result = nullptr;
   GPR_ASSERT(r->resolving);
@@ -268,13 +260,13 @@
         num_args_to_add);
     if (service_config != nullptr) grpc_service_config_destroy(service_config);
     gpr_free(service_config_string);
-    grpc_lb_addresses_destroy(exec_ctx, r->lb_addresses);
+    grpc_lb_addresses_destroy(r->lb_addresses);
   } else {
     const char* msg = grpc_error_string(error);
     gpr_log(GPR_DEBUG, "dns resolution failed: %s", msg);
     grpc_millis next_try =
-        grpc_backoff_step(exec_ctx, &r->backoff_state).next_attempt_start_time;
-    grpc_millis timeout = next_try - grpc_exec_ctx_now(exec_ctx);
+        grpc_backoff_step(&r->backoff_state).next_attempt_start_time;
+    grpc_millis timeout = next_try - grpc_core::ExecCtx::Get()->Now();
     gpr_log(GPR_INFO, "dns resolution failed (will retry): %s",
             grpc_error_string(error));
     GPR_ASSERT(!r->have_retry_timer);
@@ -285,20 +277,19 @@
     } else {
       gpr_log(GPR_DEBUG, "retrying immediately");
     }
-    grpc_timer_init(exec_ctx, &r->retry_timer, next_try,
+    grpc_timer_init(&r->retry_timer, next_try,
                     &r->dns_ares_on_retry_timer_locked);
   }
   if (r->resolved_result != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+    grpc_channel_args_destroy(r->resolved_result);
   }
   r->resolved_result = result;
   r->resolved_version++;
-  dns_ares_maybe_finish_next_locked(exec_ctx, r);
-  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "dns-resolving");
+  dns_ares_maybe_finish_next_locked(r);
+  GRPC_RESOLVER_UNREF(&r->base, "dns-resolving");
 }
 
-static void dns_ares_next_locked(grpc_exec_ctx* exec_ctx,
-                                 grpc_resolver* resolver,
+static void dns_ares_next_locked(grpc_resolver* resolver,
                                  grpc_channel_args** target_result,
                                  grpc_closure* on_complete) {
   gpr_log(GPR_DEBUG, "dns_ares_next is called.");
@@ -308,56 +299,53 @@
   r->target_result = target_result;
   if (r->resolved_version == 0 && !r->resolving) {
     grpc_backoff_reset(&r->backoff_state);
-    dns_ares_start_resolving_locked(exec_ctx, r);
+    dns_ares_start_resolving_locked(r);
   } else {
-    dns_ares_maybe_finish_next_locked(exec_ctx, r);
+    dns_ares_maybe_finish_next_locked(r);
   }
 }
 
-static void dns_ares_start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                            ares_dns_resolver* r) {
+static void dns_ares_start_resolving_locked(ares_dns_resolver* r) {
   GRPC_RESOLVER_REF(&r->base, "dns-resolving");
   GPR_ASSERT(!r->resolving);
   r->resolving = true;
   r->lb_addresses = nullptr;
   r->service_config_json = nullptr;
   r->pending_request = grpc_dns_lookup_ares(
-      exec_ctx, r->dns_server, r->name_to_resolve, r->default_port,
-      r->interested_parties, &r->dns_ares_on_resolved_locked, &r->lb_addresses,
+      r->dns_server, r->name_to_resolve, r->default_port, r->interested_parties,
+      &r->dns_ares_on_resolved_locked, &r->lb_addresses,
       true /* check_grpclb */,
       r->request_service_config ? &r->service_config_json : nullptr);
 }
 
-static void dns_ares_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                              ares_dns_resolver* r) {
+static void dns_ares_maybe_finish_next_locked(ares_dns_resolver* r) {
   if (r->next_completion != nullptr &&
       r->resolved_version != r->published_version) {
     *r->target_result = r->resolved_result == nullptr
                             ? nullptr
                             : grpc_channel_args_copy(r->resolved_result);
     gpr_log(GPR_DEBUG, "dns_ares_maybe_finish_next_locked");
-    GRPC_CLOSURE_SCHED(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = nullptr;
     r->published_version = r->resolved_version;
   }
 }
 
-static void dns_ares_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
+static void dns_ares_destroy(grpc_resolver* gr) {
   gpr_log(GPR_DEBUG, "dns_ares_destroy");
   ares_dns_resolver* r = (ares_dns_resolver*)gr;
   if (r->resolved_result != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+    grpc_channel_args_destroy(r->resolved_result);
   }
-  grpc_pollset_set_destroy(exec_ctx, r->interested_parties);
+  grpc_pollset_set_destroy(r->interested_parties);
   gpr_free(r->dns_server);
   gpr_free(r->name_to_resolve);
   gpr_free(r->default_port);
-  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
-static grpc_resolver* dns_ares_create(grpc_exec_ctx* exec_ctx,
-                                      grpc_resolver_args* args,
+static grpc_resolver* dns_ares_create(grpc_resolver_args* args,
                                       const char* default_port) {
   /* Get name from args. */
   const char* path = args->uri->path;
@@ -378,8 +366,7 @@
       arg, (grpc_integer_options){false, false, true});
   r->interested_parties = grpc_pollset_set_create();
   if (args->pollset_set != nullptr) {
-    grpc_pollset_set_add_pollset_set(exec_ctx, r->interested_parties,
-                                     args->pollset_set);
+    grpc_pollset_set_add_pollset_set(r->interested_parties, args->pollset_set);
   }
   grpc_backoff_init(
       &r->backoff_state, GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS * 1000,
@@ -404,9 +391,8 @@
 static void dns_ares_factory_unref(grpc_resolver_factory* factory) {}
 
 static grpc_resolver* dns_factory_create_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
-    grpc_resolver_args* args) {
-  return dns_ares_create(exec_ctx, args, "https");
+    grpc_resolver_factory* factory, grpc_resolver_args* args) {
+  return dns_ares_create(args, "https");
 }
 
 static char* dns_ares_factory_get_default_host_name(
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h
index 03ea36b..ba7dad6 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h
@@ -28,8 +28,7 @@
 /* Start \a ev_driver. It will keep working until all IO on its ares_channel is
    done, or grpc_ares_ev_driver_destroy() is called. It may notify the callbacks
    bound to its ares_channel when necessary. */
-void grpc_ares_ev_driver_start(grpc_exec_ctx* exec_ctx,
-                               grpc_ares_ev_driver* ev_driver);
+void grpc_ares_ev_driver_start(grpc_ares_ev_driver* ev_driver);
 
 /* Returns the ares_channel owned by \a ev_driver. To bind a c-ares query to
    \a ev_driver, use the ares_channel owned by \a ev_driver as the arg of the
@@ -47,8 +46,7 @@
 void grpc_ares_ev_driver_destroy(grpc_ares_ev_driver* ev_driver);
 
 /* Shutdown all the grpc_fds used by \a ev_driver */
-void grpc_ares_ev_driver_shutdown(grpc_exec_ctx* exec_ctx,
-                                  grpc_ares_ev_driver* ev_driver);
+void grpc_ares_ev_driver_shutdown(grpc_ares_ev_driver* ev_driver);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_DNS_C_ARES_GRPC_ARES_EV_DRIVER_H \
         */
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
index 4cb068a..40e2645 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
@@ -77,8 +77,7 @@
   bool shutting_down;
 };
 
-static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
-                                             grpc_ares_ev_driver* ev_driver);
+static void grpc_ares_notify_on_event_locked(grpc_ares_ev_driver* ev_driver);
 
 static grpc_ares_ev_driver* grpc_ares_ev_driver_ref(
     grpc_ares_ev_driver* ev_driver) {
@@ -98,7 +97,7 @@
   }
 }
 
-static void fd_node_destroy(grpc_exec_ctx* exec_ctx, fd_node* fdn) {
+static void fd_node_destroy(fd_node* fdn) {
   gpr_log(GPR_DEBUG, "delete fd: %d", grpc_fd_wrapped_fd(fdn->fd));
   GPR_ASSERT(!fdn->readable_registered);
   GPR_ASSERT(!fdn->writable_registered);
@@ -106,21 +105,20 @@
   /* c-ares library has closed the fd inside grpc_fd. This fd may be picked up
      immediately by another thread, and should not be closed by the following
      grpc_fd_orphan. */
-  grpc_fd_orphan(exec_ctx, fdn->fd, nullptr, nullptr, true /* already_closed */,
+  grpc_fd_orphan(fdn->fd, nullptr, nullptr, true /* already_closed */,
                  "c-ares query finished");
   gpr_free(fdn);
 }
 
-static void fd_node_shutdown(grpc_exec_ctx* exec_ctx, fd_node* fdn) {
+static void fd_node_shutdown(fd_node* fdn) {
   gpr_mu_lock(&fdn->mu);
   fdn->shutting_down = true;
   if (!fdn->readable_registered && !fdn->writable_registered) {
     gpr_mu_unlock(&fdn->mu);
-    fd_node_destroy(exec_ctx, fdn);
+    fd_node_destroy(fdn);
   } else {
     grpc_fd_shutdown(
-        exec_ctx, fdn->fd,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("c-ares fd shutdown"));
+        fdn->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING("c-ares fd shutdown"));
     gpr_mu_unlock(&fdn->mu);
   }
 }
@@ -160,15 +158,13 @@
   grpc_ares_ev_driver_unref(ev_driver);
 }
 
-void grpc_ares_ev_driver_shutdown(grpc_exec_ctx* exec_ctx,
-                                  grpc_ares_ev_driver* ev_driver) {
+void grpc_ares_ev_driver_shutdown(grpc_ares_ev_driver* ev_driver) {
   gpr_mu_lock(&ev_driver->mu);
   ev_driver->shutting_down = true;
   fd_node* fn = ev_driver->fds;
   while (fn != nullptr) {
-    grpc_fd_shutdown(
-        exec_ctx, fn->fd,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("grpc_ares_ev_driver_shutdown"));
+    grpc_fd_shutdown(fn->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                 "grpc_ares_ev_driver_shutdown"));
     fn = fn->next;
   }
   gpr_mu_unlock(&ev_driver->mu);
@@ -199,8 +195,7 @@
   return ioctl(fd, FIONREAD, &bytes_available) == 0 && bytes_available > 0;
 }
 
-static void on_readable_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void on_readable_cb(void* arg, grpc_error* error) {
   fd_node* fdn = (fd_node*)arg;
   grpc_ares_ev_driver* ev_driver = fdn->ev_driver;
   gpr_mu_lock(&fdn->mu);
@@ -208,7 +203,7 @@
   fdn->readable_registered = false;
   if (fdn->shutting_down && !fdn->writable_registered) {
     gpr_mu_unlock(&fdn->mu);
-    fd_node_destroy(exec_ctx, fdn);
+    fd_node_destroy(fdn);
     grpc_ares_ev_driver_unref(ev_driver);
     return;
   }
@@ -229,13 +224,12 @@
     ares_cancel(ev_driver->channel);
   }
   gpr_mu_lock(&ev_driver->mu);
-  grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+  grpc_ares_notify_on_event_locked(ev_driver);
   gpr_mu_unlock(&ev_driver->mu);
   grpc_ares_ev_driver_unref(ev_driver);
 }
 
-static void on_writable_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void on_writable_cb(void* arg, grpc_error* error) {
   fd_node* fdn = (fd_node*)arg;
   grpc_ares_ev_driver* ev_driver = fdn->ev_driver;
   gpr_mu_lock(&fdn->mu);
@@ -243,7 +237,7 @@
   fdn->writable_registered = false;
   if (fdn->shutting_down && !fdn->readable_registered) {
     gpr_mu_unlock(&fdn->mu);
-    fd_node_destroy(exec_ctx, fdn);
+    fd_node_destroy(fdn);
     grpc_ares_ev_driver_unref(ev_driver);
     return;
   }
@@ -262,7 +256,7 @@
     ares_cancel(ev_driver->channel);
   }
   gpr_mu_lock(&ev_driver->mu);
-  grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+  grpc_ares_notify_on_event_locked(ev_driver);
   gpr_mu_unlock(&ev_driver->mu);
   grpc_ares_ev_driver_unref(ev_driver);
 }
@@ -273,8 +267,7 @@
 
 // Get the file descriptors used by the ev_driver's ares channel, register
 // driver_closure with these filedescriptors.
-static void grpc_ares_notify_on_event_locked(grpc_exec_ctx* exec_ctx,
-                                             grpc_ares_ev_driver* ev_driver) {
+static void grpc_ares_notify_on_event_locked(grpc_ares_ev_driver* ev_driver) {
   fd_node* new_list = nullptr;
   if (!ev_driver->shutting_down) {
     ares_socket_t socks[ARES_GETSOCK_MAXNUM];
@@ -300,7 +293,7 @@
                             grpc_schedule_on_exec_ctx);
           GRPC_CLOSURE_INIT(&fdn->write_closure, on_writable_cb, fdn,
                             grpc_schedule_on_exec_ctx);
-          grpc_pollset_set_add_fd(exec_ctx, ev_driver->pollset_set, fdn->fd);
+          grpc_pollset_set_add_fd(ev_driver->pollset_set, fdn->fd);
           gpr_free(fd_name);
         }
         fdn->next = new_list;
@@ -312,7 +305,7 @@
             !fdn->readable_registered) {
           grpc_ares_ev_driver_ref(ev_driver);
           gpr_log(GPR_DEBUG, "notify read on: %d", grpc_fd_wrapped_fd(fdn->fd));
-          grpc_fd_notify_on_read(exec_ctx, fdn->fd, &fdn->read_closure);
+          grpc_fd_notify_on_read(fdn->fd, &fdn->read_closure);
           fdn->readable_registered = true;
         }
         // Register write_closure if the socket is writable and write_closure
@@ -322,7 +315,7 @@
           gpr_log(GPR_DEBUG, "notify write on: %d",
                   grpc_fd_wrapped_fd(fdn->fd));
           grpc_ares_ev_driver_ref(ev_driver);
-          grpc_fd_notify_on_write(exec_ctx, fdn->fd, &fdn->write_closure);
+          grpc_fd_notify_on_write(fdn->fd, &fdn->write_closure);
           fdn->writable_registered = true;
         }
         gpr_mu_unlock(&fdn->mu);
@@ -335,7 +328,7 @@
   while (ev_driver->fds != nullptr) {
     fd_node* cur = ev_driver->fds;
     ev_driver->fds = ev_driver->fds->next;
-    fd_node_shutdown(exec_ctx, cur);
+    fd_node_shutdown(cur);
   }
   ev_driver->fds = new_list;
   // If the ev driver has no working fd, all the tasks are done.
@@ -345,12 +338,11 @@
   }
 }
 
-void grpc_ares_ev_driver_start(grpc_exec_ctx* exec_ctx,
-                               grpc_ares_ev_driver* ev_driver) {
+void grpc_ares_ev_driver_start(grpc_ares_ev_driver* ev_driver) {
   gpr_mu_lock(&ev_driver->mu);
   if (!ev_driver->working) {
     ev_driver->working = true;
-    grpc_ares_notify_on_event_locked(exec_ctx, ev_driver);
+    grpc_ares_notify_on_event_locked(ev_driver);
   }
   gpr_mu_unlock(&ev_driver->mu);
 }
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
index 7846576..3a870b2 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
@@ -96,24 +96,12 @@
   gpr_ref(&r->pending_queries);
 }
 
-static void grpc_ares_request_unref(grpc_exec_ctx* exec_ctx,
-                                    grpc_ares_request* r) {
+static void grpc_ares_request_unref(grpc_ares_request* r) {
   /* If there are no pending queries, invoke on_done callback and destroy the
      request */
   if (gpr_unref(&r->pending_queries)) {
     /* TODO(zyc): Sort results with RFC6724 before invoking on_done. */
-    if (exec_ctx == nullptr) {
-      /* A new exec_ctx is created here, as the c-ares interface does not
-         provide one in ares_host_callback. It's safe to schedule on_done with
-         the newly created exec_ctx, since the caller has been warned not to
-         acquire locks in on_done. ares_dns_resolver is using combiner to
-         protect resources needed by on_done. */
-      grpc_exec_ctx new_exec_ctx = GRPC_EXEC_CTX_INIT;
-      GRPC_CLOSURE_SCHED(&new_exec_ctx, r->on_done, r->error);
-      grpc_exec_ctx_finish(&new_exec_ctx);
-    } else {
-      GRPC_CLOSURE_SCHED(exec_ctx, r->on_done, r->error);
-    }
+    GRPC_CLOSURE_SCHED(r->on_done, r->error);
     gpr_mu_destroy(&r->mu);
     grpc_ares_ev_driver_destroy(r->ev_driver);
     gpr_free(r);
@@ -133,9 +121,8 @@
   return hr;
 }
 
-static void destroy_hostbyname_request(grpc_exec_ctx* exec_ctx,
-                                       grpc_ares_hostbyname_request* hr) {
-  grpc_ares_request_unref(exec_ctx, hr->parent_request);
+static void destroy_hostbyname_request(grpc_ares_hostbyname_request* hr) {
+  grpc_ares_request_unref(hr->parent_request);
   gpr_free(hr->host);
   gpr_free(hr);
 }
@@ -220,13 +207,13 @@
     }
   }
   gpr_mu_unlock(&r->mu);
-  destroy_hostbyname_request(nullptr, hr);
+  destroy_hostbyname_request(hr);
 }
 
 static void on_srv_query_done_cb(void* arg, int status, int timeouts,
                                  unsigned char* abuf, int alen) {
   grpc_ares_request* r = (grpc_ares_request*)arg;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "on_query_srv_done_cb");
   if (status == ARES_SUCCESS) {
     gpr_log(GPR_DEBUG, "on_query_srv_done_cb ARES_SUCCESS");
@@ -246,7 +233,7 @@
             r, srv_it->host, htons(srv_it->port), true /* is_balancer */);
         ares_gethostbyname(*channel, hr->host, AF_INET, on_hostbyname_done_cb,
                            hr);
-        grpc_ares_ev_driver_start(&exec_ctx, r->ev_driver);
+        grpc_ares_ev_driver_start(r->ev_driver);
       }
     }
     if (reply != nullptr) {
@@ -264,8 +251,7 @@
       r->error = grpc_error_add_child(error, r->error);
     }
   }
-  grpc_ares_request_unref(&exec_ctx, r);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_ares_request_unref(r);
 }
 
 static const char g_service_config_attribute_prefix[] = "grpc_config=";
@@ -323,14 +309,13 @@
   }
 done:
   gpr_mu_unlock(&r->mu);
-  grpc_ares_request_unref(nullptr, r);
+  grpc_ares_request_unref(r);
 }
 
 static grpc_ares_request* grpc_dns_lookup_ares_impl(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addrs, bool check_grpclb,
-    char** service_config_json) {
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addrs, bool check_grpclb, char** service_config_json) {
   grpc_error* error = GRPC_ERROR_NONE;
   grpc_ares_hostbyname_request* hr = nullptr;
   grpc_ares_request* r = nullptr;
@@ -437,28 +422,28 @@
     gpr_free(config_name);
   }
   /* TODO(zyc): Handle CNAME records here. */
-  grpc_ares_ev_driver_start(exec_ctx, r->ev_driver);
-  grpc_ares_request_unref(exec_ctx, r);
+  grpc_ares_ev_driver_start(r->ev_driver);
+  grpc_ares_request_unref(r);
   gpr_free(host);
   gpr_free(port);
   return r;
 
 error_cleanup:
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
   gpr_free(host);
   gpr_free(port);
   return nullptr;
 }
 
 grpc_ares_request* (*grpc_dns_lookup_ares)(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addrs, bool check_grpclb,
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addrs, bool check_grpclb,
     char** service_config_json) = grpc_dns_lookup_ares_impl;
 
-void grpc_cancel_ares_request(grpc_exec_ctx* exec_ctx, grpc_ares_request* r) {
+void grpc_cancel_ares_request(grpc_ares_request* r) {
   if (grpc_dns_lookup_ares == grpc_dns_lookup_ares_impl) {
-    grpc_ares_ev_driver_shutdown(exec_ctx, r->ev_driver);
+    grpc_ares_ev_driver_shutdown(r->ev_driver);
   }
 }
 
@@ -501,8 +486,7 @@
   grpc_closure on_dns_lookup_done;
 } grpc_resolve_address_ares_request;
 
-static void on_dns_lookup_done_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                                  grpc_error* error) {
+static void on_dns_lookup_done_cb(void* arg, grpc_error* error) {
   grpc_resolve_address_ares_request* r =
       (grpc_resolve_address_ares_request*)arg;
   grpc_resolved_addresses** resolved_addresses = r->addrs_out;
@@ -520,14 +504,12 @@
              &r->lb_addrs->addresses[i].address, sizeof(grpc_resolved_address));
     }
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, r->on_resolve_address_done,
-                     GRPC_ERROR_REF(error));
-  grpc_lb_addresses_destroy(exec_ctx, r->lb_addrs);
+  GRPC_CLOSURE_SCHED(r->on_resolve_address_done, GRPC_ERROR_REF(error));
+  grpc_lb_addresses_destroy(r->lb_addrs);
   gpr_free(r);
 }
 
-static void grpc_resolve_address_ares_impl(grpc_exec_ctx* exec_ctx,
-                                           const char* name,
+static void grpc_resolve_address_ares_impl(const char* name,
                                            const char* default_port,
                                            grpc_pollset_set* interested_parties,
                                            grpc_closure* on_done,
@@ -539,14 +521,14 @@
   r->on_resolve_address_done = on_done;
   GRPC_CLOSURE_INIT(&r->on_dns_lookup_done, on_dns_lookup_done_cb, r,
                     grpc_schedule_on_exec_ctx);
-  grpc_dns_lookup_ares(exec_ctx, nullptr /* dns_server */, name, default_port,
+  grpc_dns_lookup_ares(nullptr /* dns_server */, name, default_port,
                        interested_parties, &r->on_dns_lookup_done, &r->lb_addrs,
                        false /* check_grpclb */,
                        nullptr /* service_config_json */);
 }
 
 void (*grpc_resolve_address_ares)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addrs) = grpc_resolve_address_ares_impl;
 
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h
index 72db622..86d870e 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h
@@ -32,8 +32,7 @@
    must be called at least once before this function. \a on_done may be
    called directly in this function without being scheduled with \a exec_ctx,
    so it must not try to acquire locks that are being held by the caller. */
-extern void (*grpc_resolve_address_ares)(grpc_exec_ctx* exec_ctx,
-                                         const char* name,
+extern void (*grpc_resolve_address_ares)(const char* name,
                                          const char* default_port,
                                          grpc_pollset_set* interested_parties,
                                          grpc_closure* on_done,
@@ -47,14 +46,13 @@
   scheduled with \a exec_ctx, so it must not try to acquire locks that are
   being held by the caller. */
 extern grpc_ares_request* (*grpc_dns_lookup_ares)(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addresses, bool check_grpclb,
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addresses, bool check_grpclb,
     char** service_config_json);
 
 /* Cancel the pending grpc_ares_request \a request */
-void grpc_cancel_ares_request(grpc_exec_ctx* exec_ctx,
-                              grpc_ares_request* request);
+void grpc_cancel_ares_request(grpc_ares_request* request);
 
 /* Initialize gRPC ares wrapper. Must be called at least once before
    grpc_resolve_address_ares(). */
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc
index a68a7c4..a184cf2 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.cc
@@ -26,34 +26,32 @@
 };
 
 static grpc_ares_request* grpc_dns_lookup_ares_impl(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addrs, bool check_grpclb,
-    char** service_config_json) {
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addrs, bool check_grpclb, char** service_config_json) {
   return NULL;
 }
 
 grpc_ares_request* (*grpc_dns_lookup_ares)(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* name,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addrs, bool check_grpclb,
+    const char* dns_server, const char* name, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addrs, bool check_grpclb,
     char** service_config_json) = grpc_dns_lookup_ares_impl;
 
-void grpc_cancel_ares_request(grpc_exec_ctx* exec_ctx, grpc_ares_request* r) {}
+void grpc_cancel_ares_request(grpc_ares_request* r) {}
 
 grpc_error* grpc_ares_init(void) { return GRPC_ERROR_NONE; }
 
 void grpc_ares_cleanup(void) {}
 
-static void grpc_resolve_address_ares_impl(grpc_exec_ctx* exec_ctx,
-                                           const char* name,
+static void grpc_resolve_address_ares_impl(const char* name,
                                            const char* default_port,
                                            grpc_pollset_set* interested_parties,
                                            grpc_closure* on_done,
                                            grpc_resolved_addresses** addrs) {}
 
 void (*grpc_resolve_address_ares)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addrs) = grpc_resolve_address_ares_impl;
 
diff --git a/src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc b/src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc
index fc40ce6..77698e9 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc
@@ -76,49 +76,42 @@
   grpc_resolved_addresses* addresses;
 } dns_resolver;
 
-static void dns_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
+static void dns_destroy(grpc_resolver* r);
 
-static void dns_start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                       dns_resolver* r);
-static void dns_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                         dns_resolver* r);
+static void dns_start_resolving_locked(dns_resolver* r);
+static void dns_maybe_finish_next_locked(dns_resolver* r);
 
-static void dns_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
-static void dns_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                         grpc_resolver* r);
-static void dns_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r,
-                            grpc_channel_args** target_result,
+static void dns_shutdown_locked(grpc_resolver* r);
+static void dns_channel_saw_error_locked(grpc_resolver* r);
+static void dns_next_locked(grpc_resolver* r, grpc_channel_args** target_result,
                             grpc_closure* on_complete);
 
 static const grpc_resolver_vtable dns_resolver_vtable = {
     dns_destroy, dns_shutdown_locked, dns_channel_saw_error_locked,
     dns_next_locked};
 
-static void dns_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                grpc_resolver* resolver) {
+static void dns_shutdown_locked(grpc_resolver* resolver) {
   dns_resolver* r = (dns_resolver*)resolver;
   if (r->have_retry_timer) {
-    grpc_timer_cancel(exec_ctx, &r->retry_timer);
+    grpc_timer_cancel(&r->retry_timer);
   }
   if (r->next_completion != nullptr) {
     *r->target_result = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, r->next_completion,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                               "Resolver Shutdown"));
     r->next_completion = nullptr;
   }
 }
 
-static void dns_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                         grpc_resolver* resolver) {
+static void dns_channel_saw_error_locked(grpc_resolver* resolver) {
   dns_resolver* r = (dns_resolver*)resolver;
   if (!r->resolving) {
     grpc_backoff_reset(&r->backoff_state);
-    dns_start_resolving_locked(exec_ctx, r);
+    dns_start_resolving_locked(r);
   }
 }
 
-static void dns_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* resolver,
+static void dns_next_locked(grpc_resolver* resolver,
                             grpc_channel_args** target_result,
                             grpc_closure* on_complete) {
   dns_resolver* r = (dns_resolver*)resolver;
@@ -127,28 +120,26 @@
   r->target_result = target_result;
   if (r->resolved_version == 0 && !r->resolving) {
     grpc_backoff_reset(&r->backoff_state);
-    dns_start_resolving_locked(exec_ctx, r);
+    dns_start_resolving_locked(r);
   } else {
-    dns_maybe_finish_next_locked(exec_ctx, r);
+    dns_maybe_finish_next_locked(r);
   }
 }
 
-static void dns_on_retry_timer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void dns_on_retry_timer_locked(void* arg, grpc_error* error) {
   dns_resolver* r = (dns_resolver*)arg;
 
   r->have_retry_timer = false;
   if (error == GRPC_ERROR_NONE) {
     if (!r->resolving) {
-      dns_start_resolving_locked(exec_ctx, r);
+      dns_start_resolving_locked(r);
     }
   }
 
-  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "retry-timer");
+  GRPC_RESOLVER_UNREF(&r->base, "retry-timer");
 }
 
-static void dns_on_resolved_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void dns_on_resolved_locked(void* arg, grpc_error* error) {
   dns_resolver* r = (dns_resolver*)arg;
   grpc_channel_args* result = nullptr;
   GPR_ASSERT(r->resolving);
@@ -168,11 +159,11 @@
     grpc_arg new_arg = grpc_lb_addresses_create_channel_arg(addresses);
     result = grpc_channel_args_copy_and_add(r->channel_args, &new_arg, 1);
     grpc_resolved_addresses_destroy(r->addresses);
-    grpc_lb_addresses_destroy(exec_ctx, addresses);
+    grpc_lb_addresses_destroy(addresses);
   } else {
     grpc_millis next_try =
-        grpc_backoff_step(exec_ctx, &r->backoff_state).next_attempt_start_time;
-    grpc_millis timeout = next_try - grpc_exec_ctx_now(exec_ctx);
+        grpc_backoff_step(&r->backoff_state).next_attempt_start_time;
+    grpc_millis timeout = next_try - grpc_core::ExecCtx::Get()->Now();
     gpr_log(GPR_INFO, "dns resolution failed (will retry): %s",
             grpc_error_string(error));
     GPR_ASSERT(!r->have_retry_timer);
@@ -185,59 +176,56 @@
     }
     GRPC_CLOSURE_INIT(&r->on_retry, dns_on_retry_timer_locked, r,
                       grpc_combiner_scheduler(r->base.combiner));
-    grpc_timer_init(exec_ctx, &r->retry_timer, next_try, &r->on_retry);
+    grpc_timer_init(&r->retry_timer, next_try, &r->on_retry);
   }
   if (r->resolved_result != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+    grpc_channel_args_destroy(r->resolved_result);
   }
   r->resolved_result = result;
   r->resolved_version++;
-  dns_maybe_finish_next_locked(exec_ctx, r);
+  dns_maybe_finish_next_locked(r);
   GRPC_ERROR_UNREF(error);
 
-  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "dns-resolving");
+  GRPC_RESOLVER_UNREF(&r->base, "dns-resolving");
 }
 
-static void dns_start_resolving_locked(grpc_exec_ctx* exec_ctx,
-                                       dns_resolver* r) {
+static void dns_start_resolving_locked(dns_resolver* r) {
   GRPC_RESOLVER_REF(&r->base, "dns-resolving");
   GPR_ASSERT(!r->resolving);
   r->resolving = true;
   r->addresses = nullptr;
   grpc_resolve_address(
-      exec_ctx, r->name_to_resolve, r->default_port, r->interested_parties,
+      r->name_to_resolve, r->default_port, r->interested_parties,
       GRPC_CLOSURE_CREATE(dns_on_resolved_locked, r,
                           grpc_combiner_scheduler(r->base.combiner)),
       &r->addresses);
 }
 
-static void dns_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                         dns_resolver* r) {
+static void dns_maybe_finish_next_locked(dns_resolver* r) {
   if (r->next_completion != nullptr &&
       r->resolved_version != r->published_version) {
     *r->target_result = r->resolved_result == nullptr
                             ? nullptr
                             : grpc_channel_args_copy(r->resolved_result);
-    GRPC_CLOSURE_SCHED(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = nullptr;
     r->published_version = r->resolved_version;
   }
 }
 
-static void dns_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
+static void dns_destroy(grpc_resolver* gr) {
   dns_resolver* r = (dns_resolver*)gr;
   if (r->resolved_result != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->resolved_result);
+    grpc_channel_args_destroy(r->resolved_result);
   }
-  grpc_pollset_set_destroy(exec_ctx, r->interested_parties);
+  grpc_pollset_set_destroy(r->interested_parties);
   gpr_free(r->name_to_resolve);
   gpr_free(r->default_port);
-  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
-static grpc_resolver* dns_create(grpc_exec_ctx* exec_ctx,
-                                 grpc_resolver_args* args,
+static grpc_resolver* dns_create(grpc_resolver_args* args,
                                  const char* default_port) {
   if (0 != strcmp(args->uri->authority, "")) {
     gpr_log(GPR_ERROR, "authority based dns uri's not supported");
@@ -254,8 +242,7 @@
   r->channel_args = grpc_channel_args_copy(args->args);
   r->interested_parties = grpc_pollset_set_create();
   if (args->pollset_set != nullptr) {
-    grpc_pollset_set_add_pollset_set(exec_ctx, r->interested_parties,
-                                     args->pollset_set);
+    grpc_pollset_set_add_pollset_set(r->interested_parties, args->pollset_set);
   }
   grpc_backoff_init(
       &r->backoff_state, GRPC_DNS_INITIAL_CONNECT_BACKOFF_SECONDS * 1000,
@@ -274,9 +261,8 @@
 static void dns_factory_unref(grpc_resolver_factory* factory) {}
 
 static grpc_resolver* dns_factory_create_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
-    grpc_resolver_args* args) {
-  return dns_create(exec_ctx, args, "https");
+    grpc_resolver_factory* factory, grpc_resolver_args* args) {
+  return dns_create(args, "https");
 }
 
 static char* dns_factory_get_default_host_name(grpc_resolver_factory* factory,
diff --git a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc
index 44798ca..fe3ad14 100644
--- a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc
+++ b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc
@@ -67,57 +67,52 @@
   grpc_channel_args** target_result;
 } fake_resolver;
 
-static void fake_resolver_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
+static void fake_resolver_destroy(grpc_resolver* gr) {
   fake_resolver* r = (fake_resolver*)gr;
-  grpc_channel_args_destroy(exec_ctx, r->next_results);
-  grpc_channel_args_destroy(exec_ctx, r->results_upon_error);
-  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_channel_args_destroy(r->next_results);
+  grpc_channel_args_destroy(r->results_upon_error);
+  grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
-static void fake_resolver_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_resolver* resolver) {
+static void fake_resolver_shutdown_locked(grpc_resolver* resolver) {
   fake_resolver* r = (fake_resolver*)resolver;
   if (r->next_completion != nullptr) {
     *r->target_result = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, r->next_completion,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                               "Resolver Shutdown"));
     r->next_completion = nullptr;
   }
 }
 
-static void fake_resolver_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                                   fake_resolver* r) {
+static void fake_resolver_maybe_finish_next_locked(fake_resolver* r) {
   if (r->next_completion != nullptr && r->next_results != nullptr) {
     *r->target_result =
         grpc_channel_args_union(r->next_results, r->channel_args);
-    grpc_channel_args_destroy(exec_ctx, r->next_results);
+    grpc_channel_args_destroy(r->next_results);
     r->next_results = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = nullptr;
   }
 }
 
-static void fake_resolver_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                                   grpc_resolver* resolver) {
+static void fake_resolver_channel_saw_error_locked(grpc_resolver* resolver) {
   fake_resolver* r = (fake_resolver*)resolver;
   if (r->next_results == nullptr && r->results_upon_error != nullptr) {
     // Pretend we re-resolved.
     r->next_results = grpc_channel_args_copy(r->results_upon_error);
   }
-  fake_resolver_maybe_finish_next_locked(exec_ctx, r);
+  fake_resolver_maybe_finish_next_locked(r);
 }
 
-static void fake_resolver_next_locked(grpc_exec_ctx* exec_ctx,
-                                      grpc_resolver* resolver,
+static void fake_resolver_next_locked(grpc_resolver* resolver,
                                       grpc_channel_args** target_result,
                                       grpc_closure* on_complete) {
   fake_resolver* r = (fake_resolver*)resolver;
   GPR_ASSERT(!r->next_completion);
   r->next_completion = on_complete;
   r->target_result = target_result;
-  fake_resolver_maybe_finish_next_locked(exec_ctx, r);
+  fake_resolver_maybe_finish_next_locked(r);
 }
 
 static const grpc_resolver_vtable fake_resolver_vtable = {
@@ -157,33 +152,31 @@
   grpc_channel_args* next_response;
 } set_response_closure_arg;
 
-static void set_response_closure_fn(grpc_exec_ctx* exec_ctx, void* arg,
-                                    grpc_error* error) {
+static void set_response_closure_fn(void* arg, grpc_error* error) {
   set_response_closure_arg* closure_arg = (set_response_closure_arg*)arg;
   grpc_fake_resolver_response_generator* generator = closure_arg->generator;
   fake_resolver* r = generator->resolver;
   if (r->next_results != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->next_results);
+    grpc_channel_args_destroy(r->next_results);
   }
   r->next_results = closure_arg->next_response;
   if (r->results_upon_error != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, r->results_upon_error);
+    grpc_channel_args_destroy(r->results_upon_error);
   }
   r->results_upon_error = grpc_channel_args_copy(closure_arg->next_response);
   gpr_free(closure_arg);
-  fake_resolver_maybe_finish_next_locked(exec_ctx, r);
+  fake_resolver_maybe_finish_next_locked(r);
 }
 
 void grpc_fake_resolver_response_generator_set_response(
-    grpc_exec_ctx* exec_ctx, grpc_fake_resolver_response_generator* generator,
+    grpc_fake_resolver_response_generator* generator,
     grpc_channel_args* next_response) {
   GPR_ASSERT(generator->resolver != nullptr);
   set_response_closure_arg* closure_arg =
       (set_response_closure_arg*)gpr_zalloc(sizeof(*closure_arg));
   closure_arg->generator = generator;
   closure_arg->next_response = grpc_channel_args_copy(next_response);
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_INIT(&closure_arg->set_response_closure,
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_INIT(&closure_arg->set_response_closure,
                                        set_response_closure_fn, closure_arg,
                                        grpc_combiner_scheduler(
                                            generator->resolver->base.combiner)),
@@ -195,7 +188,7 @@
       (grpc_fake_resolver_response_generator*)p);
 }
 
-static void response_generator_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
+static void response_generator_arg_destroy(void* p) {
   grpc_fake_resolver_response_generator_unref(
       (grpc_fake_resolver_response_generator*)p);
 }
@@ -232,8 +225,7 @@
 
 static void fake_resolver_factory_unref(grpc_resolver_factory* factory) {}
 
-static grpc_resolver* fake_resolver_create(grpc_exec_ctx* exec_ctx,
-                                           grpc_resolver_factory* factory,
+static grpc_resolver* fake_resolver_create(grpc_resolver_factory* factory,
                                            grpc_resolver_args* args) {
   fake_resolver* r = (fake_resolver*)gpr_zalloc(sizeof(*r));
   r->channel_args = grpc_channel_args_copy(args->args);
diff --git a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h
index 7035cdd..a8977e5 100644
--- a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h
+++ b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h
@@ -39,7 +39,7 @@
 // Instruct the fake resolver associated with the \a response_generator instance
 // to trigger a new resolution for \a uri and \a args.
 void grpc_fake_resolver_response_generator_set_response(
-    grpc_exec_ctx* exec_ctx, grpc_fake_resolver_response_generator* generator,
+    grpc_fake_resolver_response_generator* generator,
     grpc_channel_args* next_response);
 
 // Return a \a grpc_arg for a \a grpc_fake_resolver_response_generator instance.
diff --git a/src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc b/src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc
index f0934b5..7d1e283 100644
--- a/src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc
+++ b/src/core/ext/filters/client_channel/resolver/sockaddr/sockaddr_resolver.cc
@@ -52,15 +52,13 @@
   grpc_channel_args** target_result;
 } sockaddr_resolver;
 
-static void sockaddr_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
+static void sockaddr_destroy(grpc_resolver* r);
 
-static void sockaddr_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                              sockaddr_resolver* r);
+static void sockaddr_maybe_finish_next_locked(sockaddr_resolver* r);
 
-static void sockaddr_shutdown_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r);
-static void sockaddr_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_resolver* r);
-static void sockaddr_next_locked(grpc_exec_ctx* exec_ctx, grpc_resolver* r,
+static void sockaddr_shutdown_locked(grpc_resolver* r);
+static void sockaddr_channel_saw_error_locked(grpc_resolver* r);
+static void sockaddr_next_locked(grpc_resolver* r,
                                  grpc_channel_args** target_result,
                                  grpc_closure* on_complete);
 
@@ -68,52 +66,47 @@
     sockaddr_destroy, sockaddr_shutdown_locked,
     sockaddr_channel_saw_error_locked, sockaddr_next_locked};
 
-static void sockaddr_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_resolver* resolver) {
+static void sockaddr_shutdown_locked(grpc_resolver* resolver) {
   sockaddr_resolver* r = (sockaddr_resolver*)resolver;
   if (r->next_completion != nullptr) {
     *r->target_result = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, r->next_completion,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Resolver Shutdown"));
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                               "Resolver Shutdown"));
     r->next_completion = nullptr;
   }
 }
 
-static void sockaddr_channel_saw_error_locked(grpc_exec_ctx* exec_ctx,
-                                              grpc_resolver* resolver) {
+static void sockaddr_channel_saw_error_locked(grpc_resolver* resolver) {
   sockaddr_resolver* r = (sockaddr_resolver*)resolver;
   r->published = false;
-  sockaddr_maybe_finish_next_locked(exec_ctx, r);
+  sockaddr_maybe_finish_next_locked(r);
 }
 
-static void sockaddr_next_locked(grpc_exec_ctx* exec_ctx,
-                                 grpc_resolver* resolver,
+static void sockaddr_next_locked(grpc_resolver* resolver,
                                  grpc_channel_args** target_result,
                                  grpc_closure* on_complete) {
   sockaddr_resolver* r = (sockaddr_resolver*)resolver;
   GPR_ASSERT(!r->next_completion);
   r->next_completion = on_complete;
   r->target_result = target_result;
-  sockaddr_maybe_finish_next_locked(exec_ctx, r);
+  sockaddr_maybe_finish_next_locked(r);
 }
 
-static void sockaddr_maybe_finish_next_locked(grpc_exec_ctx* exec_ctx,
-                                              sockaddr_resolver* r) {
+static void sockaddr_maybe_finish_next_locked(sockaddr_resolver* r) {
   if (r->next_completion != nullptr && !r->published) {
     r->published = true;
     grpc_arg arg = grpc_lb_addresses_create_channel_arg(r->addresses);
     *r->target_result =
         grpc_channel_args_copy_and_add(r->channel_args, &arg, 1);
-    GRPC_CLOSURE_SCHED(exec_ctx, r->next_completion, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->next_completion, GRPC_ERROR_NONE);
     r->next_completion = nullptr;
   }
 }
 
-static void sockaddr_destroy(grpc_exec_ctx* exec_ctx, grpc_resolver* gr) {
+static void sockaddr_destroy(grpc_resolver* gr) {
   sockaddr_resolver* r = (sockaddr_resolver*)gr;
-  grpc_lb_addresses_destroy(exec_ctx, r->addresses);
-  grpc_channel_args_destroy(exec_ctx, r->channel_args);
+  grpc_lb_addresses_destroy(r->addresses);
+  grpc_channel_args_destroy(r->channel_args);
   gpr_free(r);
 }
 
@@ -142,8 +135,7 @@
 
 static void do_nothing(void* ignored) {}
 
-static grpc_resolver* sockaddr_create(grpc_exec_ctx* exec_ctx,
-                                      grpc_resolver_args* args,
+static grpc_resolver* sockaddr_create(grpc_resolver_args* args,
                                       bool parse(const grpc_uri* uri,
                                                  grpc_resolved_address* dst)) {
   if (0 != strcmp(args->uri->authority, "")) {
@@ -170,10 +162,10 @@
     gpr_free(part_str);
     if (errors_found) break;
   }
-  grpc_slice_buffer_destroy_internal(exec_ctx, &path_parts);
-  grpc_slice_unref_internal(exec_ctx, path_slice);
+  grpc_slice_buffer_destroy_internal(&path_parts);
+  grpc_slice_unref_internal(path_slice);
   if (errors_found) {
-    grpc_lb_addresses_destroy(exec_ctx, addresses);
+    grpc_lb_addresses_destroy(addresses);
     return nullptr;
   }
   /* Instantiate resolver. */
@@ -195,9 +187,8 @@
 
 #define DECL_FACTORY(name)                                                  \
   static grpc_resolver* name##_factory_create_resolver(                     \
-      grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,              \
-      grpc_resolver_args* args) {                                           \
-    return sockaddr_create(exec_ctx, args, grpc_parse_##name);              \
+      grpc_resolver_factory* factory, grpc_resolver_args* args) {           \
+    return sockaddr_create(args, grpc_parse_##name);                        \
   }                                                                         \
   static const grpc_resolver_factory_vtable name##_factory_vtable = {       \
       sockaddr_factory_ref, sockaddr_factory_unref,                         \
diff --git a/src/core/ext/filters/client_channel/resolver_factory.cc b/src/core/ext/filters/client_channel/resolver_factory.cc
index 1a289d9..9b3ec2f 100644
--- a/src/core/ext/filters/client_channel/resolver_factory.cc
+++ b/src/core/ext/filters/client_channel/resolver_factory.cc
@@ -28,10 +28,9 @@
 
 /** Create a resolver instance for a name */
 grpc_resolver* grpc_resolver_factory_create_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
-    grpc_resolver_args* args) {
+    grpc_resolver_factory* factory, grpc_resolver_args* args) {
   if (factory == nullptr) return nullptr;
-  return factory->vtable->create_resolver(exec_ctx, factory, args);
+  return factory->vtable->create_resolver(factory, args);
 }
 
 char* grpc_resolver_factory_get_default_authority(
diff --git a/src/core/ext/filters/client_channel/resolver_factory.h b/src/core/ext/filters/client_channel/resolver_factory.h
index fcf8ec4..170ecc0 100644
--- a/src/core/ext/filters/client_channel/resolver_factory.h
+++ b/src/core/ext/filters/client_channel/resolver_factory.h
@@ -43,8 +43,7 @@
   void (*unref)(grpc_resolver_factory* factory);
 
   /** Implementation of grpc_resolver_factory_create_resolver */
-  grpc_resolver* (*create_resolver)(grpc_exec_ctx* exec_ctx,
-                                    grpc_resolver_factory* factory,
+  grpc_resolver* (*create_resolver)(grpc_resolver_factory* factory,
                                     grpc_resolver_args* args);
 
   /** Implementation of grpc_resolver_factory_get_default_authority */
@@ -59,8 +58,7 @@
 
 /** Create a resolver instance for a name */
 grpc_resolver* grpc_resolver_factory_create_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_resolver_factory* factory,
-    grpc_resolver_args* args);
+    grpc_resolver_factory* factory, grpc_resolver_args* args);
 
 /** Return a (freshly allocated with gpr_malloc) string representing
     the default authority to use for this scheme. */
diff --git a/src/core/ext/filters/client_channel/resolver_registry.cc b/src/core/ext/filters/client_channel/resolver_registry.cc
index 5da6114..3f8451d 100644
--- a/src/core/ext/filters/client_channel/resolver_registry.cc
+++ b/src/core/ext/filters/client_channel/resolver_registry.cc
@@ -92,23 +92,22 @@
   return lookup_factory(uri->scheme);
 }
 
-static grpc_resolver_factory* resolve_factory(grpc_exec_ctx* exec_ctx,
-                                              const char* target,
+static grpc_resolver_factory* resolve_factory(const char* target,
                                               grpc_uri** uri,
                                               char** canonical_target) {
   grpc_resolver_factory* factory = nullptr;
 
   GPR_ASSERT(uri != nullptr);
-  *uri = grpc_uri_parse(exec_ctx, target, 1);
+  *uri = grpc_uri_parse(target, 1);
   factory = lookup_factory_by_uri(*uri);
   if (factory == nullptr) {
     grpc_uri_destroy(*uri);
     gpr_asprintf(canonical_target, "%s%s", g_default_resolver_prefix, target);
-    *uri = grpc_uri_parse(exec_ctx, *canonical_target, 1);
+    *uri = grpc_uri_parse(*canonical_target, 1);
     factory = lookup_factory_by_uri(*uri);
     if (factory == nullptr) {
-      grpc_uri_destroy(grpc_uri_parse(exec_ctx, target, 0));
-      grpc_uri_destroy(grpc_uri_parse(exec_ctx, *canonical_target, 0));
+      grpc_uri_destroy(grpc_uri_parse(target, 0));
+      grpc_uri_destroy(grpc_uri_parse(*canonical_target, 0));
       gpr_log(GPR_ERROR, "don't know how to resolve '%s' or '%s'", target,
               *canonical_target);
     }
@@ -116,14 +115,14 @@
   return factory;
 }
 
-grpc_resolver* grpc_resolver_create(grpc_exec_ctx* exec_ctx, const char* target,
+grpc_resolver* grpc_resolver_create(const char* target,
                                     const grpc_channel_args* args,
                                     grpc_pollset_set* pollset_set,
                                     grpc_combiner* combiner) {
   grpc_uri* uri = nullptr;
   char* canonical_target = nullptr;
   grpc_resolver_factory* factory =
-      resolve_factory(exec_ctx, target, &uri, &canonical_target);
+      resolve_factory(target, &uri, &canonical_target);
   grpc_resolver* resolver;
   grpc_resolver_args resolver_args;
   memset(&resolver_args, 0, sizeof(resolver_args));
@@ -131,29 +130,27 @@
   resolver_args.args = args;
   resolver_args.pollset_set = pollset_set;
   resolver_args.combiner = combiner;
-  resolver =
-      grpc_resolver_factory_create_resolver(exec_ctx, factory, &resolver_args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &resolver_args);
   grpc_uri_destroy(uri);
   gpr_free(canonical_target);
   return resolver;
 }
 
-char* grpc_get_default_authority(grpc_exec_ctx* exec_ctx, const char* target) {
+char* grpc_get_default_authority(const char* target) {
   grpc_uri* uri = nullptr;
   char* canonical_target = nullptr;
   grpc_resolver_factory* factory =
-      resolve_factory(exec_ctx, target, &uri, &canonical_target);
+      resolve_factory(target, &uri, &canonical_target);
   char* authority = grpc_resolver_factory_get_default_authority(factory, uri);
   grpc_uri_destroy(uri);
   gpr_free(canonical_target);
   return authority;
 }
 
-char* grpc_resolver_factory_add_default_prefix_if_needed(
-    grpc_exec_ctx* exec_ctx, const char* target) {
+char* grpc_resolver_factory_add_default_prefix_if_needed(const char* target) {
   grpc_uri* uri = nullptr;
   char* canonical_target = nullptr;
-  resolve_factory(exec_ctx, target, &uri, &canonical_target);
+  resolve_factory(target, &uri, &canonical_target);
   grpc_uri_destroy(uri);
   return canonical_target == nullptr ? gpr_strdup(target) : canonical_target;
 }
diff --git a/src/core/ext/filters/client_channel/resolver_registry.h b/src/core/ext/filters/client_channel/resolver_registry.h
index ecc9f82..bbd30df 100644
--- a/src/core/ext/filters/client_channel/resolver_registry.h
+++ b/src/core/ext/filters/client_channel/resolver_registry.h
@@ -48,7 +48,7 @@
     (typically the set of arguments passed in from the client API).
     \a pollset_set is used to drive IO in the name resolution process, it
     should not be NULL. */
-grpc_resolver* grpc_resolver_create(grpc_exec_ctx* exec_ctx, const char* target,
+grpc_resolver* grpc_resolver_create(const char* target,
                                     const grpc_channel_args* args,
                                     grpc_pollset_set* pollset_set,
                                     grpc_combiner* combiner);
@@ -59,11 +59,10 @@
 
 /** Given a target, return a (freshly allocated with gpr_malloc) string
     representing the default authority to pass from a client. */
-char* grpc_get_default_authority(grpc_exec_ctx* exec_ctx, const char* target);
+char* grpc_get_default_authority(const char* target);
 
 /** Returns a newly allocated string containing \a target, adding the
     default prefix if needed. */
-char* grpc_resolver_factory_add_default_prefix_if_needed(
-    grpc_exec_ctx* exec_ctx, const char* target);
+char* grpc_resolver_factory_add_default_prefix_if_needed(const char* target);
 
 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_REGISTRY_H */
diff --git a/src/core/ext/filters/client_channel/subchannel.cc b/src/core/ext/filters/client_channel/subchannel.cc
index 58e294d..84a5ace 100644
--- a/src/core/ext/filters/client_channel/subchannel.cc
+++ b/src/core/ext/filters/client_channel/subchannel.cc
@@ -139,8 +139,7 @@
 #define CALLSTACK_TO_SUBCHANNEL_CALL(callstack) \
   (((grpc_subchannel_call*)(callstack)) - 1)
 
-static void subchannel_connected(grpc_exec_ctx* exec_ctx, void* subchannel,
-                                 grpc_error* error);
+static void subchannel_connected(void* subchannel, grpc_error* error);
 
 #ifndef NDEBUG
 #define REF_REASON reason
@@ -157,10 +156,9 @@
  * connection implementation
  */
 
-static void connection_destroy(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void connection_destroy(void* arg, grpc_error* error) {
   grpc_connected_subchannel* c = (grpc_connected_subchannel*)arg;
-  grpc_channel_stack_destroy(exec_ctx, CHANNEL_STACK_FROM_CONNECTION(c));
+  grpc_channel_stack_destroy(CHANNEL_STACK_FROM_CONNECTION(c));
   gpr_free(c);
 }
 
@@ -170,26 +168,23 @@
   return c;
 }
 
-void grpc_connected_subchannel_unref(grpc_exec_ctx* exec_ctx,
-                                     grpc_connected_subchannel* c
-                                         GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, CHANNEL_STACK_FROM_CONNECTION(c),
-                           REF_REASON);
+void grpc_connected_subchannel_unref(
+    grpc_connected_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
+  GRPC_CHANNEL_STACK_UNREF(CHANNEL_STACK_FROM_CONNECTION(c), REF_REASON);
 }
 
 /*
  * grpc_subchannel implementation
  */
 
-static void subchannel_destroy(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void subchannel_destroy(void* arg, grpc_error* error) {
   grpc_subchannel* c = (grpc_subchannel*)arg;
   gpr_free((void*)c->filters);
-  grpc_channel_args_destroy(exec_ctx, c->args);
-  grpc_connectivity_state_destroy(exec_ctx, &c->state_tracker);
-  grpc_connector_unref(exec_ctx, c->connector);
-  grpc_pollset_set_destroy(exec_ctx, c->pollset_set);
-  grpc_subchannel_key_destroy(exec_ctx, c->key);
+  grpc_channel_args_destroy(c->args);
+  grpc_connectivity_state_destroy(&c->state_tracker);
+  grpc_connector_unref(c->connector);
+  grpc_pollset_set_destroy(c->pollset_set);
+  grpc_subchannel_key_destroy(c->key);
   gpr_mu_destroy(&c->mu);
   gpr_free(c);
 }
@@ -241,59 +236,54 @@
   }
 }
 
-static void disconnect(grpc_exec_ctx* exec_ctx, grpc_subchannel* c) {
+static void disconnect(grpc_subchannel* c) {
   grpc_connected_subchannel* con;
-  grpc_subchannel_index_unregister(exec_ctx, c->key, c);
+  grpc_subchannel_index_unregister(c->key, c);
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(!c->disconnected);
   c->disconnected = true;
-  grpc_connector_shutdown(
-      exec_ctx, c->connector,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("Subchannel disconnected"));
+  grpc_connector_shutdown(c->connector, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                            "Subchannel disconnected"));
   con = GET_CONNECTED_SUBCHANNEL(c, no_barrier);
   if (con != nullptr) {
-    GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, con, "connection");
+    GRPC_CONNECTED_SUBCHANNEL_UNREF(con, "connection");
     gpr_atm_no_barrier_store(&c->connected_subchannel, (gpr_atm)0xdeadbeef);
   }
   gpr_mu_unlock(&c->mu);
 }
 
-void grpc_subchannel_unref(grpc_exec_ctx* exec_ctx,
-                           grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
+void grpc_subchannel_unref(grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
   gpr_atm old_refs;
   // add a weak ref and subtract a strong ref (atomically)
   old_refs = ref_mutate(c, (gpr_atm)1 - (gpr_atm)(1 << INTERNAL_REF_BITS),
                         1 REF_MUTATE_PURPOSE("STRONG_UNREF"));
   if ((old_refs & STRONG_REF_MASK) == (1 << INTERNAL_REF_BITS)) {
-    disconnect(exec_ctx, c);
+    disconnect(c);
   }
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "strong-unref");
+  GRPC_SUBCHANNEL_WEAK_UNREF(c, "strong-unref");
 }
 
-void grpc_subchannel_weak_unref(grpc_exec_ctx* exec_ctx,
-                                grpc_subchannel* c
-                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
+void grpc_subchannel_weak_unref(
+    grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
   gpr_atm old_refs;
   old_refs = ref_mutate(c, -(gpr_atm)1, 1 REF_MUTATE_PURPOSE("WEAK_UNREF"));
   if (old_refs == 1) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(subchannel_destroy, c, grpc_schedule_on_exec_ctx),
         GRPC_ERROR_NONE);
   }
 }
 
-grpc_subchannel* grpc_subchannel_create(grpc_exec_ctx* exec_ctx,
-                                        grpc_connector* connector,
+grpc_subchannel* grpc_subchannel_create(grpc_connector* connector,
                                         const grpc_subchannel_args* args) {
   grpc_subchannel_key* key = grpc_subchannel_key_create(args);
-  grpc_subchannel* c = grpc_subchannel_index_find(exec_ctx, key);
+  grpc_subchannel* c = grpc_subchannel_index_find(key);
   if (c) {
-    grpc_subchannel_key_destroy(exec_ctx, key);
+    grpc_subchannel_key_destroy(key);
     return c;
   }
 
-  GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED(exec_ctx);
+  GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED();
   c = (grpc_subchannel*)gpr_zalloc(sizeof(*c));
   c->key = key;
   gpr_atm_no_barrier_store(&c->ref_pair, 1 << INTERNAL_REF_BITS);
@@ -311,10 +301,10 @@
   c->pollset_set = grpc_pollset_set_create();
   grpc_resolved_address* addr =
       (grpc_resolved_address*)gpr_malloc(sizeof(*addr));
-  grpc_get_subchannel_address_arg(exec_ctx, args->args, addr);
+  grpc_get_subchannel_address_arg(args->args, addr);
   grpc_resolved_address* new_address = nullptr;
   grpc_channel_args* new_args = nullptr;
-  if (grpc_proxy_mappers_map_address(exec_ctx, addr, args->args, &new_address,
+  if (grpc_proxy_mappers_map_address(addr, args->args, &new_address,
                                      &new_args)) {
     GPR_ASSERT(new_address != nullptr);
     gpr_free(addr);
@@ -327,7 +317,7 @@
       new_args != nullptr ? new_args : args->args, keys_to_remove,
       GPR_ARRAY_SIZE(keys_to_remove), &new_arg, 1);
   gpr_free(new_arg.value.string);
-  if (new_args != nullptr) grpc_channel_args_destroy(exec_ctx, new_args);
+  if (new_args != nullptr) grpc_channel_args_destroy(new_args);
   c->root_external_state_watcher.next = c->root_external_state_watcher.prev =
       &c->root_external_state_watcher;
   GRPC_CLOSURE_INIT(&c->connected, subchannel_connected, c,
@@ -373,21 +363,19 @@
       min_backoff_ms, max_backoff_ms);
   gpr_mu_init(&c->mu);
 
-  return grpc_subchannel_index_register(exec_ctx, key, c);
+  return grpc_subchannel_index_register(key, c);
 }
 
-static void continue_connect_locked(grpc_exec_ctx* exec_ctx,
-                                    grpc_subchannel* c) {
+static void continue_connect_locked(grpc_subchannel* c) {
   grpc_connect_in_args args;
 
   args.interested_parties = c->pollset_set;
   args.deadline = c->backoff_result.current_deadline;
   args.channel_args = c->args;
 
-  grpc_connectivity_state_set(exec_ctx, &c->state_tracker,
-                              GRPC_CHANNEL_CONNECTING, GRPC_ERROR_NONE,
-                              "state_change");
-  grpc_connector_connect(exec_ctx, c->connector, &args, &c->connecting_result,
+  grpc_connectivity_state_set(&c->state_tracker, GRPC_CHANNEL_CONNECTING,
+                              GRPC_ERROR_NONE, "state_change");
+  grpc_connector_connect(c->connector, &args, &c->connecting_result,
                          &c->connected);
 }
 
@@ -400,24 +388,23 @@
   return state;
 }
 
-static void on_external_state_watcher_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void on_external_state_watcher_done(void* arg, grpc_error* error) {
   external_state_watcher* w = (external_state_watcher*)arg;
   grpc_closure* follow_up = w->notify;
   if (w->pollset_set != nullptr) {
-    grpc_pollset_set_del_pollset_set(exec_ctx, w->subchannel->pollset_set,
+    grpc_pollset_set_del_pollset_set(w->subchannel->pollset_set,
                                      w->pollset_set);
   }
   gpr_mu_lock(&w->subchannel->mu);
   w->next->prev = w->prev;
   w->prev->next = w->next;
   gpr_mu_unlock(&w->subchannel->mu);
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, w->subchannel, "external_state_watcher");
+  GRPC_SUBCHANNEL_WEAK_UNREF(w->subchannel, "external_state_watcher");
   gpr_free(w);
-  GRPC_CLOSURE_RUN(exec_ctx, follow_up, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(follow_up, GRPC_ERROR_REF(error));
 }
 
-static void on_alarm(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_alarm(void* arg, grpc_error* error) {
   grpc_subchannel* c = (grpc_subchannel*)arg;
   gpr_mu_lock(&c->mu);
   c->have_alarm = false;
@@ -429,18 +416,17 @@
   }
   if (error == GRPC_ERROR_NONE) {
     gpr_log(GPR_INFO, "Failed to connect to channel, retrying");
-    c->backoff_result = grpc_backoff_step(exec_ctx, &c->backoff_state);
-    continue_connect_locked(exec_ctx, c);
+    c->backoff_result = grpc_backoff_step(&c->backoff_state);
+    continue_connect_locked(c);
     gpr_mu_unlock(&c->mu);
   } else {
     gpr_mu_unlock(&c->mu);
-    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+    GRPC_SUBCHANNEL_WEAK_UNREF(c, "connecting");
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void maybe_start_connecting_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_subchannel* c) {
+static void maybe_start_connecting_locked(grpc_subchannel* c) {
   if (c->disconnected) {
     /* Don't try to connect if we're already disconnected */
     return;
@@ -466,28 +452,28 @@
 
   if (!c->backoff_begun) {
     c->backoff_begun = true;
-    c->backoff_result = grpc_backoff_begin(exec_ctx, &c->backoff_state);
-    continue_connect_locked(exec_ctx, c);
+    c->backoff_result = grpc_backoff_begin(&c->backoff_state);
+    continue_connect_locked(c);
   } else {
     GPR_ASSERT(!c->have_alarm);
     c->have_alarm = true;
     const grpc_millis time_til_next =
-        c->backoff_result.next_attempt_start_time - grpc_exec_ctx_now(exec_ctx);
+        c->backoff_result.next_attempt_start_time -
+        grpc_core::ExecCtx::Get()->Now();
     if (time_til_next <= 0) {
       gpr_log(GPR_INFO, "Retry immediately");
     } else {
       gpr_log(GPR_INFO, "Retry in %" PRIdPTR " milliseconds", time_til_next);
     }
     GRPC_CLOSURE_INIT(&c->on_alarm, on_alarm, c, grpc_schedule_on_exec_ctx);
-    grpc_timer_init(exec_ctx, &c->alarm,
-                    c->backoff_result.next_attempt_start_time, &c->on_alarm);
+    grpc_timer_init(&c->alarm, c->backoff_result.next_attempt_start_time,
+                    &c->on_alarm);
   }
 }
 
 void grpc_subchannel_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_subchannel* c,
-    grpc_pollset_set* interested_parties, grpc_connectivity_state* state,
-    grpc_closure* notify) {
+    grpc_subchannel* c, grpc_pollset_set* interested_parties,
+    grpc_connectivity_state* state, grpc_closure* notify) {
   external_state_watcher* w;
 
   if (state == nullptr) {
@@ -495,8 +481,8 @@
     for (w = c->root_external_state_watcher.next;
          w != &c->root_external_state_watcher; w = w->next) {
       if (w->notify == notify) {
-        grpc_connectivity_state_notify_on_state_change(
-            exec_ctx, &c->state_tracker, nullptr, &w->closure);
+        grpc_connectivity_state_notify_on_state_change(&c->state_tracker,
+                                                       nullptr, &w->closure);
       }
     }
     gpr_mu_unlock(&c->mu);
@@ -508,31 +494,28 @@
     GRPC_CLOSURE_INIT(&w->closure, on_external_state_watcher_done, w,
                       grpc_schedule_on_exec_ctx);
     if (interested_parties != nullptr) {
-      grpc_pollset_set_add_pollset_set(exec_ctx, c->pollset_set,
-                                       interested_parties);
+      grpc_pollset_set_add_pollset_set(c->pollset_set, interested_parties);
     }
     GRPC_SUBCHANNEL_WEAK_REF(c, "external_state_watcher");
     gpr_mu_lock(&c->mu);
     w->next = &c->root_external_state_watcher;
     w->prev = w->next->prev;
     w->next->prev = w->prev->next = w;
-    grpc_connectivity_state_notify_on_state_change(exec_ctx, &c->state_tracker,
-                                                   state, &w->closure);
-    maybe_start_connecting_locked(exec_ctx, c);
+    grpc_connectivity_state_notify_on_state_change(&c->state_tracker, state,
+                                                   &w->closure);
+    maybe_start_connecting_locked(c);
     gpr_mu_unlock(&c->mu);
   }
 }
 
 void grpc_connected_subchannel_process_transport_op(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* con,
-    grpc_transport_op* op) {
+    grpc_connected_subchannel* con, grpc_transport_op* op) {
   grpc_channel_stack* channel_stack = CHANNEL_STACK_FROM_CONNECTION(con);
   grpc_channel_element* top_elem = grpc_channel_stack_element(channel_stack, 0);
-  top_elem->filter->start_transport_op(exec_ctx, top_elem, op);
+  top_elem->filter->start_transport_op(top_elem, op);
 }
 
-static void subchannel_on_child_state_changed(grpc_exec_ctx* exec_ctx, void* p,
-                                              grpc_error* error) {
+static void subchannel_on_child_state_changed(void* p, grpc_error* error) {
   state_watcher* sw = (state_watcher*)p;
   grpc_subchannel* c = sw->subchannel;
   gpr_mu* mu = &c->mu;
@@ -544,24 +527,22 @@
     /* any errors on a subchannel ==> we're done, create a new one */
     sw->connectivity_state = GRPC_CHANNEL_SHUTDOWN;
   }
-  grpc_connectivity_state_set(exec_ctx, &c->state_tracker,
-                              sw->connectivity_state, GRPC_ERROR_REF(error),
-                              "reflect_child");
+  grpc_connectivity_state_set(&c->state_tracker, sw->connectivity_state,
+                              GRPC_ERROR_REF(error), "reflect_child");
   if (sw->connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
     grpc_connected_subchannel_notify_on_state_change(
-        exec_ctx, GET_CONNECTED_SUBCHANNEL(c, no_barrier), nullptr,
+        GET_CONNECTED_SUBCHANNEL(c, no_barrier), nullptr,
         &sw->connectivity_state, &sw->closure);
     GRPC_SUBCHANNEL_WEAK_REF(c, "state_watcher");
     sw = nullptr;
   }
 
   gpr_mu_unlock(mu);
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "state_watcher");
+  GRPC_SUBCHANNEL_WEAK_UNREF(c, "state_watcher");
   gpr_free(sw);
 }
 
-static void connected_subchannel_state_op(grpc_exec_ctx* exec_ctx,
-                                          grpc_connected_subchannel* con,
+static void connected_subchannel_state_op(grpc_connected_subchannel* con,
                                           grpc_pollset_set* interested_parties,
                                           grpc_connectivity_state* state,
                                           grpc_closure* closure) {
@@ -571,29 +552,27 @@
   op->on_connectivity_state_change = closure;
   op->bind_pollset_set = interested_parties;
   elem = grpc_channel_stack_element(CHANNEL_STACK_FROM_CONNECTION(con), 0);
-  elem->filter->start_transport_op(exec_ctx, elem, op);
+  elem->filter->start_transport_op(elem, op);
 }
 
 void grpc_connected_subchannel_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* con,
-    grpc_pollset_set* interested_parties, grpc_connectivity_state* state,
-    grpc_closure* closure) {
-  connected_subchannel_state_op(exec_ctx, con, interested_parties, state,
-                                closure);
+    grpc_connected_subchannel* con, grpc_pollset_set* interested_parties,
+    grpc_connectivity_state* state, grpc_closure* closure) {
+  connected_subchannel_state_op(con, interested_parties, state, closure);
 }
 
-void grpc_connected_subchannel_ping(grpc_exec_ctx* exec_ctx,
-                                    grpc_connected_subchannel* con,
-                                    grpc_closure* closure) {
+void grpc_connected_subchannel_ping(grpc_connected_subchannel* con,
+                                    grpc_closure* on_initiate,
+                                    grpc_closure* on_ack) {
   grpc_transport_op* op = grpc_make_transport_op(nullptr);
   grpc_channel_element* elem;
-  op->send_ping = closure;
+  op->send_ping.on_initiate = on_initiate;
+  op->send_ping.on_ack = on_ack;
   elem = grpc_channel_stack_element(CHANNEL_STACK_FROM_CONNECTION(con), 0);
-  elem->filter->start_transport_op(exec_ctx, elem, op);
+  elem->filter->start_transport_op(elem, op);
 }
 
-static bool publish_transport_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_subchannel* c) {
+static bool publish_transport_locked(grpc_subchannel* c) {
   grpc_connected_subchannel* con;
   grpc_channel_stack* stk;
   state_watcher* sw_subchannel;
@@ -601,19 +580,18 @@
   /* construct channel stack */
   grpc_channel_stack_builder* builder = grpc_channel_stack_builder_create();
   grpc_channel_stack_builder_set_channel_arguments(
-      exec_ctx, builder, c->connecting_result.channel_args);
+      builder, c->connecting_result.channel_args);
   grpc_channel_stack_builder_set_transport(builder,
                                            c->connecting_result.transport);
 
-  if (!grpc_channel_init_create_stack(exec_ctx, builder,
-                                      GRPC_CLIENT_SUBCHANNEL)) {
-    grpc_channel_stack_builder_destroy(exec_ctx, builder);
+  if (!grpc_channel_init_create_stack(builder, GRPC_CLIENT_SUBCHANNEL)) {
+    grpc_channel_stack_builder_destroy(builder);
     return false;
   }
   grpc_error* error = grpc_channel_stack_builder_finish(
-      exec_ctx, builder, 0, 1, connection_destroy, nullptr, (void**)&con);
+      builder, 0, 1, connection_destroy, nullptr, (void**)&con);
   if (error != GRPC_ERROR_NONE) {
-    grpc_transport_destroy(exec_ctx, c->connecting_result.transport);
+    grpc_transport_destroy(c->connecting_result.transport);
     gpr_log(GPR_ERROR, "error initializing subchannel stack: %s",
             grpc_error_string(error));
     GRPC_ERROR_UNREF(error);
@@ -631,7 +609,7 @@
 
   if (c->disconnected) {
     gpr_free(sw_subchannel);
-    grpc_channel_stack_destroy(exec_ctx, stk);
+    grpc_channel_stack_destroy(stk);
     gpr_free(con);
     return false;
   }
@@ -647,19 +625,18 @@
   /* setup subchannel watching connected subchannel for changes; subchannel
      ref for connecting is donated to the state watcher */
   GRPC_SUBCHANNEL_WEAK_REF(c, "state_watcher");
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+  GRPC_SUBCHANNEL_WEAK_UNREF(c, "connecting");
   grpc_connected_subchannel_notify_on_state_change(
-      exec_ctx, con, c->pollset_set, &sw_subchannel->connectivity_state,
+      con, c->pollset_set, &sw_subchannel->connectivity_state,
       &sw_subchannel->closure);
 
   /* signal completion */
-  grpc_connectivity_state_set(exec_ctx, &c->state_tracker, GRPC_CHANNEL_READY,
+  grpc_connectivity_state_set(&c->state_tracker, GRPC_CHANNEL_READY,
                               GRPC_ERROR_NONE, "connected");
   return true;
 }
 
-static void subchannel_connected(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void subchannel_connected(void* arg, grpc_error* error) {
   grpc_subchannel* c = (grpc_subchannel*)arg;
   grpc_channel_args* delete_channel_args = c->connecting_result.channel_args;
 
@@ -667,13 +644,13 @@
   gpr_mu_lock(&c->mu);
   c->connecting = false;
   if (c->connecting_result.transport != nullptr &&
-      publish_transport_locked(exec_ctx, c)) {
+      publish_transport_locked(c)) {
     /* do nothing, transport was published */
   } else if (c->disconnected) {
-    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+    GRPC_SUBCHANNEL_WEAK_UNREF(c, "connecting");
   } else {
     grpc_connectivity_state_set(
-        exec_ctx, &c->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
+        &c->state_tracker, GRPC_CHANNEL_TRANSIENT_FAILURE,
         grpc_error_set_int(GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                                "Connect Failed", &error, 1),
                            GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE),
@@ -682,27 +659,26 @@
     const char* errmsg = grpc_error_string(error);
     gpr_log(GPR_INFO, "Connect failed: %s", errmsg);
 
-    maybe_start_connecting_locked(exec_ctx, c);
-    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
+    maybe_start_connecting_locked(c);
+    GRPC_SUBCHANNEL_WEAK_UNREF(c, "connecting");
   }
   gpr_mu_unlock(&c->mu);
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connected");
-  grpc_channel_args_destroy(exec_ctx, delete_channel_args);
+  GRPC_SUBCHANNEL_WEAK_UNREF(c, "connected");
+  grpc_channel_args_destroy(delete_channel_args);
 }
 
 /*
  * grpc_subchannel_call implementation
  */
 
-static void subchannel_call_destroy(grpc_exec_ctx* exec_ctx, void* call,
-                                    grpc_error* error) {
+static void subchannel_call_destroy(void* call, grpc_error* error) {
   grpc_subchannel_call* c = (grpc_subchannel_call*)call;
   GPR_ASSERT(c->schedule_closure_after_destroy != nullptr);
   GPR_TIMER_BEGIN("grpc_subchannel_call_unref.destroy", 0);
   grpc_connected_subchannel* connection = c->connection;
-  grpc_call_stack_destroy(exec_ctx, SUBCHANNEL_CALL_TO_CALL_STACK(c), nullptr,
+  grpc_call_stack_destroy(SUBCHANNEL_CALL_TO_CALL_STACK(c), nullptr,
                           c->schedule_closure_after_destroy);
-  GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, connection, "subchannel_call");
+  GRPC_CONNECTED_SUBCHANNEL_UNREF(connection, "subchannel_call");
   GPR_TIMER_END("grpc_subchannel_call_unref.destroy", 0);
 }
 
@@ -718,20 +694,18 @@
   GRPC_CALL_STACK_REF(SUBCHANNEL_CALL_TO_CALL_STACK(c), REF_REASON);
 }
 
-void grpc_subchannel_call_unref(grpc_exec_ctx* exec_ctx,
-                                grpc_subchannel_call* c
-                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
-  GRPC_CALL_STACK_UNREF(exec_ctx, SUBCHANNEL_CALL_TO_CALL_STACK(c), REF_REASON);
+void grpc_subchannel_call_unref(
+    grpc_subchannel_call* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
+  GRPC_CALL_STACK_UNREF(SUBCHANNEL_CALL_TO_CALL_STACK(c), REF_REASON);
 }
 
-void grpc_subchannel_call_process_op(grpc_exec_ctx* exec_ctx,
-                                     grpc_subchannel_call* call,
+void grpc_subchannel_call_process_op(grpc_subchannel_call* call,
                                      grpc_transport_stream_op_batch* batch) {
   GPR_TIMER_BEGIN("grpc_subchannel_call_process_op", 0);
   grpc_call_stack* call_stack = SUBCHANNEL_CALL_TO_CALL_STACK(call);
   grpc_call_element* top_elem = grpc_call_stack_element(call_stack, 0);
   GRPC_CALL_LOG_OP(GPR_INFO, top_elem, batch);
-  top_elem->filter->start_transport_stream_op_batch(exec_ctx, top_elem, batch);
+  top_elem->filter->start_transport_stream_op_batch(top_elem, batch);
   GPR_TIMER_END("grpc_subchannel_call_process_op", 0);
 }
 
@@ -746,7 +720,7 @@
 }
 
 grpc_error* grpc_connected_subchannel_create_call(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* con,
+    grpc_connected_subchannel* con,
     const grpc_connected_subchannel_call_args* args,
     grpc_subchannel_call** call) {
   grpc_channel_stack* chanstk = CHANNEL_STACK_FROM_CONNECTION(con);
@@ -764,14 +738,14 @@
       args->arena,        /* arena */
       args->call_combiner /* call_combiner */
   };
-  grpc_error* error = grpc_call_stack_init(
-      exec_ctx, chanstk, 1, subchannel_call_destroy, *call, &call_args);
+  grpc_error* error = grpc_call_stack_init(chanstk, 1, subchannel_call_destroy,
+                                           *call, &call_args);
   if (error != GRPC_ERROR_NONE) {
     const char* error_string = grpc_error_string(error);
     gpr_log(GPR_ERROR, "error: %s", error_string);
     return error;
   }
-  grpc_call_stack_set_pollset_or_pollset_set(exec_ctx, callstk, args->pollent);
+  grpc_call_stack_set_pollset_or_pollset_set(callstk, args->pollent);
   return GRPC_ERROR_NONE;
 }
 
@@ -780,21 +754,20 @@
   return SUBCHANNEL_CALL_TO_CALL_STACK(subchannel_call);
 }
 
-static void grpc_uri_to_sockaddr(grpc_exec_ctx* exec_ctx, const char* uri_str,
+static void grpc_uri_to_sockaddr(const char* uri_str,
                                  grpc_resolved_address* addr) {
-  grpc_uri* uri = grpc_uri_parse(exec_ctx, uri_str, 0 /* suppress_errors */);
+  grpc_uri* uri = grpc_uri_parse(uri_str, 0 /* suppress_errors */);
   GPR_ASSERT(uri != nullptr);
   if (!grpc_parse_uri(uri, addr)) memset(addr, 0, sizeof(*addr));
   grpc_uri_destroy(uri);
 }
 
-void grpc_get_subchannel_address_arg(grpc_exec_ctx* exec_ctx,
-                                     const grpc_channel_args* args,
+void grpc_get_subchannel_address_arg(const grpc_channel_args* args,
                                      grpc_resolved_address* addr) {
   const char* addr_uri_str = grpc_get_subchannel_address_uri_arg(args);
   memset(addr, 0, sizeof(*addr));
   if (*addr_uri_str != '\0') {
-    grpc_uri_to_sockaddr(exec_ctx, addr_uri_str, addr);
+    grpc_uri_to_sockaddr(addr_uri_str, addr);
   }
 }
 
diff --git a/src/core/ext/filters/client_channel/subchannel.h b/src/core/ext/filters/client_channel/subchannel.h
index 1f326fc..9d34fff 100644
--- a/src/core/ext/filters/client_channel/subchannel.h
+++ b/src/core/ext/filters/client_channel/subchannel.h
@@ -42,36 +42,34 @@
   grpc_subchannel_ref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(p, r) \
   grpc_subchannel_ref_from_weak_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_SUBCHANNEL_UNREF(cl, p, r) \
-  grpc_subchannel_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_SUBCHANNEL_UNREF(p, r) \
+  grpc_subchannel_unref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_WEAK_REF(p, r) \
   grpc_subchannel_weak_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_SUBCHANNEL_WEAK_UNREF(cl, p, r) \
-  grpc_subchannel_weak_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_SUBCHANNEL_WEAK_UNREF(p, r) \
+  grpc_subchannel_weak_unref((p), __FILE__, __LINE__, (r))
 #define GRPC_CONNECTED_SUBCHANNEL_REF(p, r) \
   grpc_connected_subchannel_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_CONNECTED_SUBCHANNEL_UNREF(cl, p, r) \
-  grpc_connected_subchannel_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_CONNECTED_SUBCHANNEL_UNREF(p, r) \
+  grpc_connected_subchannel_unref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_CALL_REF(p, r) \
   grpc_subchannel_call_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_SUBCHANNEL_CALL_UNREF(cl, p, r) \
-  grpc_subchannel_call_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_SUBCHANNEL_CALL_UNREF(p, r) \
+  grpc_subchannel_call_unref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_REF_EXTRA_ARGS \
   , const char *file, int line, const char *reason
 #else
 #define GRPC_SUBCHANNEL_REF(p, r) grpc_subchannel_ref((p))
 #define GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(p, r) \
   grpc_subchannel_ref_from_weak_ref((p))
-#define GRPC_SUBCHANNEL_UNREF(cl, p, r) grpc_subchannel_unref((cl), (p))
+#define GRPC_SUBCHANNEL_UNREF(p, r) grpc_subchannel_unref((p))
 #define GRPC_SUBCHANNEL_WEAK_REF(p, r) grpc_subchannel_weak_ref((p))
-#define GRPC_SUBCHANNEL_WEAK_UNREF(cl, p, r) \
-  grpc_subchannel_weak_unref((cl), (p))
+#define GRPC_SUBCHANNEL_WEAK_UNREF(p, r) grpc_subchannel_weak_unref((p))
 #define GRPC_CONNECTED_SUBCHANNEL_REF(p, r) grpc_connected_subchannel_ref((p))
-#define GRPC_CONNECTED_SUBCHANNEL_UNREF(cl, p, r) \
-  grpc_connected_subchannel_unref((cl), (p))
+#define GRPC_CONNECTED_SUBCHANNEL_UNREF(p, r) \
+  grpc_connected_subchannel_unref((p))
 #define GRPC_SUBCHANNEL_CALL_REF(p, r) grpc_subchannel_call_ref((p))
-#define GRPC_SUBCHANNEL_CALL_UNREF(cl, p, r) \
-  grpc_subchannel_call_unref((cl), (p))
+#define GRPC_SUBCHANNEL_CALL_UNREF(p, r) grpc_subchannel_call_unref((p))
 #define GRPC_SUBCHANNEL_REF_EXTRA_ARGS
 #endif
 
@@ -79,24 +77,20 @@
     grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 grpc_subchannel* grpc_subchannel_ref_from_weak_ref(
     grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
-void grpc_subchannel_unref(grpc_exec_ctx* exec_ctx,
-                           grpc_subchannel* channel
-                               GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_subchannel_unref(
+    grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 grpc_subchannel* grpc_subchannel_weak_ref(
     grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
-void grpc_subchannel_weak_unref(grpc_exec_ctx* exec_ctx,
-                                grpc_subchannel* channel
-                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_subchannel_weak_unref(
+    grpc_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 grpc_connected_subchannel* grpc_connected_subchannel_ref(
     grpc_connected_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
-void grpc_connected_subchannel_unref(grpc_exec_ctx* exec_ctx,
-                                     grpc_connected_subchannel* channel
-                                         GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_connected_subchannel_unref(
+    grpc_connected_subchannel* channel GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 void grpc_subchannel_call_ref(
     grpc_subchannel_call* call GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
-void grpc_subchannel_call_unref(grpc_exec_ctx* exec_ctx,
-                                grpc_subchannel_call* call
-                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_subchannel_call_unref(
+    grpc_subchannel_call* call GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 
 /** construct a subchannel call */
 typedef struct {
@@ -110,14 +104,13 @@
 } grpc_connected_subchannel_call_args;
 
 grpc_error* grpc_connected_subchannel_create_call(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* connected_subchannel,
+    grpc_connected_subchannel* connected_subchannel,
     const grpc_connected_subchannel_call_args* args,
     grpc_subchannel_call** subchannel_call);
 
 /** process a transport level op */
 void grpc_connected_subchannel_process_transport_op(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* subchannel,
-    grpc_transport_op* op);
+    grpc_connected_subchannel* subchannel, grpc_transport_op* op);
 
 /** poll the current connectivity state of a channel */
 grpc_connectivity_state grpc_subchannel_check_connectivity(
@@ -126,16 +119,14 @@
 /** Calls notify when the connectivity state of a channel becomes different
     from *state.  Updates *state with the new state of the channel. */
 void grpc_subchannel_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_subchannel* channel,
-    grpc_pollset_set* interested_parties, grpc_connectivity_state* state,
-    grpc_closure* notify);
+    grpc_subchannel* channel, grpc_pollset_set* interested_parties,
+    grpc_connectivity_state* state, grpc_closure* notify);
 void grpc_connected_subchannel_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_connected_subchannel* channel,
-    grpc_pollset_set* interested_parties, grpc_connectivity_state* state,
-    grpc_closure* notify);
-void grpc_connected_subchannel_ping(grpc_exec_ctx* exec_ctx,
-                                    grpc_connected_subchannel* channel,
-                                    grpc_closure* notify);
+    grpc_connected_subchannel* channel, grpc_pollset_set* interested_parties,
+    grpc_connectivity_state* state, grpc_closure* notify);
+void grpc_connected_subchannel_ping(grpc_connected_subchannel* channel,
+                                    grpc_closure* on_initiate,
+                                    grpc_closure* on_ack);
 
 /** retrieve the grpc_connected_subchannel - or NULL if called before
     the subchannel becomes connected */
@@ -147,8 +138,7 @@
     const grpc_subchannel* subchannel);
 
 /** continue processing a transport op */
-void grpc_subchannel_call_process_op(grpc_exec_ctx* exec_ctx,
-                                     grpc_subchannel_call* subchannel_call,
+void grpc_subchannel_call_process_op(grpc_subchannel_call* subchannel_call,
                                      grpc_transport_stream_op_batch* op);
 
 /** Must be called once per call. Sets the 'then_schedule_closure' argument for
@@ -172,13 +162,11 @@
 };
 
 /** create a subchannel given a connector */
-grpc_subchannel* grpc_subchannel_create(grpc_exec_ctx* exec_ctx,
-                                        grpc_connector* connector,
+grpc_subchannel* grpc_subchannel_create(grpc_connector* connector,
                                         const grpc_subchannel_args* args);
 
 /// Sets \a addr from \a args.
-void grpc_get_subchannel_address_arg(grpc_exec_ctx* exec_ctx,
-                                     const grpc_channel_args* args,
+void grpc_get_subchannel_address_arg(const grpc_channel_args* args,
                                      grpc_resolved_address* addr);
 
 /// Returns the URI string for the address to connect to.
diff --git a/src/core/ext/filters/client_channel/subchannel_index.cc b/src/core/ext/filters/client_channel/subchannel_index.cc
index 1624643..052b047 100644
--- a/src/core/ext/filters/client_channel/subchannel_index.cc
+++ b/src/core/ext/filters/client_channel/subchannel_index.cc
@@ -81,16 +81,14 @@
   return grpc_channel_args_compare(a->args.args, b->args.args);
 }
 
-void grpc_subchannel_key_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_subchannel_key* k) {
+void grpc_subchannel_key_destroy(grpc_subchannel_key* k) {
   gpr_free((grpc_channel_args*)k->args.filters);
-  grpc_channel_args_destroy(exec_ctx, (grpc_channel_args*)k->args.args);
+  grpc_channel_args_destroy((grpc_channel_args*)k->args.args);
   gpr_free(k);
 }
 
 static void sck_avl_destroy(void* p, void* user_data) {
-  grpc_exec_ctx* exec_ctx = (grpc_exec_ctx*)user_data;
-  grpc_subchannel_key_destroy(exec_ctx, (grpc_subchannel_key*)p);
+  grpc_subchannel_key_destroy((grpc_subchannel_key*)p);
 }
 
 static void* sck_avl_copy(void* p, void* unused) {
@@ -103,8 +101,7 @@
 }
 
 static void scv_avl_destroy(void* p, void* user_data) {
-  grpc_exec_ctx* exec_ctx = (grpc_exec_ctx*)user_data;
-  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, (grpc_subchannel*)p, "subchannel_index");
+  GRPC_SUBCHANNEL_WEAK_UNREF((grpc_subchannel*)p, "subchannel_index");
 }
 
 static void* scv_avl_copy(void* p, void* unused) {
@@ -135,32 +132,29 @@
 
 void grpc_subchannel_index_unref(void) {
   if (gpr_unref(&g_refcount)) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     gpr_mu_destroy(&g_mu);
-    gpr_avl_unref(g_subchannel_index, &exec_ctx);
-    grpc_exec_ctx_finish(&exec_ctx);
+    gpr_avl_unref(g_subchannel_index, grpc_core::ExecCtx::Get());
   }
 }
 
 void grpc_subchannel_index_ref(void) { gpr_ref_non_zero(&g_refcount); }
 
-grpc_subchannel* grpc_subchannel_index_find(grpc_exec_ctx* exec_ctx,
-                                            grpc_subchannel_key* key) {
+grpc_subchannel* grpc_subchannel_index_find(grpc_subchannel_key* key) {
   // Lock, and take a reference to the subchannel index.
   // We don't need to do the search under a lock as avl's are immutable.
   gpr_mu_lock(&g_mu);
-  gpr_avl index = gpr_avl_ref(g_subchannel_index, exec_ctx);
+  gpr_avl index = gpr_avl_ref(g_subchannel_index, grpc_core::ExecCtx::Get());
   gpr_mu_unlock(&g_mu);
 
   grpc_subchannel* c = GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(
-      (grpc_subchannel*)gpr_avl_get(index, key, exec_ctx), "index_find");
-  gpr_avl_unref(index, exec_ctx);
+      (grpc_subchannel*)gpr_avl_get(index, key, grpc_core::ExecCtx::Get()),
+      "index_find");
+  gpr_avl_unref(index, grpc_core::ExecCtx::Get());
 
   return c;
 }
 
-grpc_subchannel* grpc_subchannel_index_register(grpc_exec_ctx* exec_ctx,
-                                                grpc_subchannel_key* key,
+grpc_subchannel* grpc_subchannel_index_register(grpc_subchannel_key* key,
                                                 grpc_subchannel* constructed) {
   grpc_subchannel* c = nullptr;
   bool need_to_unref_constructed = false;
@@ -171,11 +165,11 @@
     // Compare and swap loop:
     // - take a reference to the current index
     gpr_mu_lock(&g_mu);
-    gpr_avl index = gpr_avl_ref(g_subchannel_index, exec_ctx);
+    gpr_avl index = gpr_avl_ref(g_subchannel_index, grpc_core::ExecCtx::Get());
     gpr_mu_unlock(&g_mu);
 
     // - Check to see if a subchannel already exists
-    c = (grpc_subchannel*)gpr_avl_get(index, key, exec_ctx);
+    c = (grpc_subchannel*)gpr_avl_get(index, key, grpc_core::ExecCtx::Get());
     if (c != nullptr) {
       c = GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(c, "index_register");
     }
@@ -184,9 +178,11 @@
       need_to_unref_constructed = true;
     } else {
       // no -> update the avl and compare/swap
-      gpr_avl updated = gpr_avl_add(
-          gpr_avl_ref(index, exec_ctx), subchannel_key_copy(key),
-          GRPC_SUBCHANNEL_WEAK_REF(constructed, "index_register"), exec_ctx);
+      gpr_avl updated =
+          gpr_avl_add(gpr_avl_ref(index, grpc_core::ExecCtx::Get()),
+                      subchannel_key_copy(key),
+                      GRPC_SUBCHANNEL_WEAK_REF(constructed, "index_register"),
+                      grpc_core::ExecCtx::Get());
 
       // it may happen (but it's expected to be unlikely)
       // that some other thread has changed the index:
@@ -198,41 +194,42 @@
       }
       gpr_mu_unlock(&g_mu);
 
-      gpr_avl_unref(updated, exec_ctx);
+      gpr_avl_unref(updated, grpc_core::ExecCtx::Get());
     }
-    gpr_avl_unref(index, exec_ctx);
+    gpr_avl_unref(index, grpc_core::ExecCtx::Get());
   }
 
   if (need_to_unref_constructed) {
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, constructed, "index_register");
+    GRPC_SUBCHANNEL_UNREF(constructed, "index_register");
   }
 
   return c;
 }
 
-void grpc_subchannel_index_unregister(grpc_exec_ctx* exec_ctx,
-                                      grpc_subchannel_key* key,
+void grpc_subchannel_index_unregister(grpc_subchannel_key* key,
                                       grpc_subchannel* constructed) {
   bool done = false;
   while (!done) {
     // Compare and swap loop:
     // - take a reference to the current index
     gpr_mu_lock(&g_mu);
-    gpr_avl index = gpr_avl_ref(g_subchannel_index, exec_ctx);
+    gpr_avl index = gpr_avl_ref(g_subchannel_index, grpc_core::ExecCtx::Get());
     gpr_mu_unlock(&g_mu);
 
     // Check to see if this key still refers to the previously
     // registered subchannel
-    grpc_subchannel* c = (grpc_subchannel*)gpr_avl_get(index, key, exec_ctx);
+    grpc_subchannel* c =
+        (grpc_subchannel*)gpr_avl_get(index, key, grpc_core::ExecCtx::Get());
     if (c != constructed) {
-      gpr_avl_unref(index, exec_ctx);
+      gpr_avl_unref(index, grpc_core::ExecCtx::Get());
       break;
     }
 
     // compare and swap the update (some other thread may have
     // mutated the index behind us)
     gpr_avl updated =
-        gpr_avl_remove(gpr_avl_ref(index, exec_ctx), key, exec_ctx);
+        gpr_avl_remove(gpr_avl_ref(index, grpc_core::ExecCtx::Get()), key,
+                       grpc_core::ExecCtx::Get());
 
     gpr_mu_lock(&g_mu);
     if (index.root == g_subchannel_index.root) {
@@ -241,8 +238,8 @@
     }
     gpr_mu_unlock(&g_mu);
 
-    gpr_avl_unref(updated, exec_ctx);
-    gpr_avl_unref(index, exec_ctx);
+    gpr_avl_unref(updated, grpc_core::ExecCtx::Get());
+    gpr_avl_unref(index, grpc_core::ExecCtx::Get());
   }
 }
 
diff --git a/src/core/ext/filters/client_channel/subchannel_index.h b/src/core/ext/filters/client_channel/subchannel_index.h
index 6a4d06e..bd160a3 100644
--- a/src/core/ext/filters/client_channel/subchannel_index.h
+++ b/src/core/ext/filters/client_channel/subchannel_index.h
@@ -29,26 +29,22 @@
     const grpc_subchannel_args* args);
 
 /** Destroy a subchannel key */
-void grpc_subchannel_key_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_subchannel_key* key);
+void grpc_subchannel_key_destroy(grpc_subchannel_key* key);
 
 /** Given a subchannel key, find the subchannel registered for it.
     Returns NULL if no such channel exists.
     Thread-safe. */
-grpc_subchannel* grpc_subchannel_index_find(grpc_exec_ctx* exec_ctx,
-                                            grpc_subchannel_key* key);
+grpc_subchannel* grpc_subchannel_index_find(grpc_subchannel_key* key);
 
 /** Register a subchannel against a key.
     Takes ownership of \a constructed.
     Returns the registered subchannel. This may be different from
     \a constructed in the case of a registration race. */
-grpc_subchannel* grpc_subchannel_index_register(grpc_exec_ctx* exec_ctx,
-                                                grpc_subchannel_key* key,
+grpc_subchannel* grpc_subchannel_index_register(grpc_subchannel_key* key,
                                                 grpc_subchannel* constructed);
 
 /** Remove \a constructed as the registered subchannel for \a key. */
-void grpc_subchannel_index_unregister(grpc_exec_ctx* exec_ctx,
-                                      grpc_subchannel_key* key,
+void grpc_subchannel_index_unregister(grpc_subchannel_key* key,
                                       grpc_subchannel* constructed);
 
 int grpc_subchannel_key_compare(const grpc_subchannel_key* a,
diff --git a/src/core/ext/filters/client_channel/uri_parser.cc b/src/core/ext/filters/client_channel/uri_parser.cc
index b76dcbe..3428f4b 100644
--- a/src/core/ext/filters/client_channel/uri_parser.cc
+++ b/src/core/ext/filters/client_channel/uri_parser.cc
@@ -56,8 +56,8 @@
 }
 
 /** Returns a copy of percent decoded \a src[begin, end) */
-static char* decode_and_copy_component(grpc_exec_ctx* exec_ctx, const char* src,
-                                       size_t begin, size_t end) {
+static char* decode_and_copy_component(const char* src, size_t begin,
+                                       size_t end) {
   grpc_slice component =
       (begin == NOT_SET || end == NOT_SET)
           ? grpc_empty_slice()
@@ -65,8 +65,8 @@
   grpc_slice decoded_component =
       grpc_permissive_percent_decode_slice(component);
   char* out = grpc_dump_slice(decoded_component, GPR_DUMP_ASCII);
-  grpc_slice_unref_internal(exec_ctx, component);
-  grpc_slice_unref_internal(exec_ctx, decoded_component);
+  grpc_slice_unref_internal(component);
+  grpc_slice_unref_internal(decoded_component);
   return out;
 }
 
@@ -184,8 +184,7 @@
   }
 }
 
-grpc_uri* grpc_uri_parse(grpc_exec_ctx* exec_ctx, const char* uri_text,
-                         bool suppress_errors) {
+grpc_uri* grpc_uri_parse(const char* uri_text, bool suppress_errors) {
   grpc_uri* uri;
   size_t scheme_begin = 0;
   size_t scheme_end = NOT_SET;
@@ -273,16 +272,13 @@
   }
 
   uri = (grpc_uri*)gpr_zalloc(sizeof(*uri));
-  uri->scheme =
-      decode_and_copy_component(exec_ctx, uri_text, scheme_begin, scheme_end);
-  uri->authority = decode_and_copy_component(exec_ctx, uri_text,
-                                             authority_begin, authority_end);
-  uri->path =
-      decode_and_copy_component(exec_ctx, uri_text, path_begin, path_end);
-  uri->query =
-      decode_and_copy_component(exec_ctx, uri_text, query_begin, query_end);
-  uri->fragment = decode_and_copy_component(exec_ctx, uri_text, fragment_begin,
-                                            fragment_end);
+  uri->scheme = decode_and_copy_component(uri_text, scheme_begin, scheme_end);
+  uri->authority =
+      decode_and_copy_component(uri_text, authority_begin, authority_end);
+  uri->path = decode_and_copy_component(uri_text, path_begin, path_end);
+  uri->query = decode_and_copy_component(uri_text, query_begin, query_end);
+  uri->fragment =
+      decode_and_copy_component(uri_text, fragment_begin, fragment_end);
   parse_query_parts(uri);
 
   return uri;
diff --git a/src/core/ext/filters/client_channel/uri_parser.h b/src/core/ext/filters/client_channel/uri_parser.h
index 8475290..24ff06c 100644
--- a/src/core/ext/filters/client_channel/uri_parser.h
+++ b/src/core/ext/filters/client_channel/uri_parser.h
@@ -37,8 +37,7 @@
 } grpc_uri;
 
 /** parse a uri, return NULL on failure */
-grpc_uri* grpc_uri_parse(grpc_exec_ctx* exec_ctx, const char* uri_text,
-                         bool suppress_errors);
+grpc_uri* grpc_uri_parse(const char* uri_text, bool suppress_errors);
 
 /** return the part of a query string after the '=' in "?key=xxx&...", or NULL
  * if key is not present */
diff --git a/src/core/ext/filters/deadline/deadline_filter.cc b/src/core/ext/filters/deadline/deadline_filter.cc
index 5db7584..c430f3d 100644
--- a/src/core/ext/filters/deadline/deadline_filter.cc
+++ b/src/core/ext/filters/deadline/deadline_filter.cc
@@ -36,18 +36,16 @@
 
 // The on_complete callback used when sending a cancel_error batch down the
 // filter stack.  Yields the call combiner when the batch returns.
-static void yield_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* ignored) {
+static void yield_call_combiner(void* arg, grpc_error* ignored) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)arg;
-  GRPC_CALL_COMBINER_STOP(exec_ctx, deadline_state->call_combiner,
+  GRPC_CALL_COMBINER_STOP(deadline_state->call_combiner,
                           "got on_complete from cancel_stream batch");
-  GRPC_CALL_STACK_UNREF(exec_ctx, deadline_state->call_stack, "deadline_timer");
+  GRPC_CALL_STACK_UNREF(deadline_state->call_stack, "deadline_timer");
 }
 
 // This is called via the call combiner, so access to deadline_state is
 // synchronized.
-static void send_cancel_op_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                            grpc_error* error) {
+static void send_cancel_op_in_call_combiner(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
   grpc_transport_stream_op_batch* batch = grpc_make_transport_stream_op(
@@ -55,37 +53,34 @@
                         deadline_state, grpc_schedule_on_exec_ctx));
   batch->cancel_stream = true;
   batch->payload->cancel_stream.cancel_error = GRPC_ERROR_REF(error);
-  elem->filter->start_transport_stream_op_batch(exec_ctx, elem, batch);
+  elem->filter->start_transport_stream_op_batch(elem, batch);
 }
 
 // Timer callback.
-static void timer_callback(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void timer_callback(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
   if (error != GRPC_ERROR_CANCELLED) {
     error = grpc_error_set_int(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Deadline Exceeded"),
         GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_DEADLINE_EXCEEDED);
-    grpc_call_combiner_cancel(exec_ctx, deadline_state->call_combiner,
+    grpc_call_combiner_cancel(deadline_state->call_combiner,
                               GRPC_ERROR_REF(error));
     GRPC_CLOSURE_INIT(&deadline_state->timer_callback,
                       send_cancel_op_in_call_combiner, elem,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CALL_COMBINER_START(exec_ctx, deadline_state->call_combiner,
+    GRPC_CALL_COMBINER_START(deadline_state->call_combiner,
                              &deadline_state->timer_callback, error,
                              "deadline exceeded -- sending cancel_stream op");
   } else {
-    GRPC_CALL_STACK_UNREF(exec_ctx, deadline_state->call_stack,
-                          "deadline_timer");
+    GRPC_CALL_STACK_UNREF(deadline_state->call_stack, "deadline_timer");
   }
 }
 
 // Starts the deadline timer.
 // This is called via the call combiner, so access to deadline_state is
 // synchronized.
-static void start_timer_if_needed(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static void start_timer_if_needed(grpc_call_element* elem,
                                   grpc_millis deadline) {
   if (deadline == GRPC_MILLIS_INF_FUTURE) {
     return;
@@ -113,17 +108,16 @@
   }
   GPR_ASSERT(closure != nullptr);
   GRPC_CALL_STACK_REF(deadline_state->call_stack, "deadline_timer");
-  grpc_timer_init(exec_ctx, &deadline_state->timer, deadline, closure);
+  grpc_timer_init(&deadline_state->timer, deadline, closure);
 }
 
 // Cancels the deadline timer.
 // This is called via the call combiner, so access to deadline_state is
 // synchronized.
-static void cancel_timer_if_needed(grpc_exec_ctx* exec_ctx,
-                                   grpc_deadline_state* deadline_state) {
+static void cancel_timer_if_needed(grpc_deadline_state* deadline_state) {
   if (deadline_state->timer_state == GRPC_DEADLINE_STATE_PENDING) {
     deadline_state->timer_state = GRPC_DEADLINE_STATE_FINISHED;
-    grpc_timer_cancel(exec_ctx, &deadline_state->timer);
+    grpc_timer_cancel(&deadline_state->timer);
   } else {
     // timer was either in STATE_INITAL (nothing to cancel)
     // OR in STATE_FINISHED (again nothing to cancel)
@@ -131,12 +125,11 @@
 }
 
 // Callback run when the call is complete.
-static void on_complete(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_complete(void* arg, grpc_error* error) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)arg;
-  cancel_timer_if_needed(exec_ctx, deadline_state);
+  cancel_timer_if_needed(deadline_state);
   // Invoke the next callback.
-  GRPC_CLOSURE_RUN(exec_ctx, deadline_state->next_on_complete,
-                   GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(deadline_state->next_on_complete, GRPC_ERROR_REF(error));
 }
 
 // Inject our own on_complete callback into op.
@@ -156,8 +149,7 @@
   grpc_millis deadline;
   grpc_closure closure;
 };
-static void start_timer_after_init(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void start_timer_after_init(void* arg, grpc_error* error) {
   struct start_timer_after_init_state* state =
       (struct start_timer_after_init_state*)arg;
   grpc_deadline_state* deadline_state =
@@ -166,18 +158,18 @@
     // We are initially called without holding the call combiner, so we
     // need to bounce ourselves into it.
     state->in_call_combiner = true;
-    GRPC_CALL_COMBINER_START(exec_ctx, deadline_state->call_combiner,
-                             &state->closure, GRPC_ERROR_REF(error),
+    GRPC_CALL_COMBINER_START(deadline_state->call_combiner, &state->closure,
+                             GRPC_ERROR_REF(error),
                              "scheduling deadline timer");
     return;
   }
-  start_timer_if_needed(exec_ctx, state->elem, state->deadline);
+  start_timer_if_needed(state->elem, state->deadline);
   gpr_free(state);
-  GRPC_CALL_COMBINER_STOP(exec_ctx, deadline_state->call_combiner,
+  GRPC_CALL_COMBINER_STOP(deadline_state->call_combiner,
                           "done scheduling deadline timer");
 }
 
-void grpc_deadline_state_init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_deadline_state_init(grpc_call_element* elem,
                               grpc_call_stack* call_stack,
                               grpc_call_combiner* call_combiner,
                               grpc_millis deadline) {
@@ -200,29 +192,27 @@
     state->deadline = deadline;
     GRPC_CLOSURE_INIT(&state->closure, start_timer_after_init, state,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CLOSURE_SCHED(exec_ctx, &state->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&state->closure, GRPC_ERROR_NONE);
   }
 }
 
-void grpc_deadline_state_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_element* elem) {
+void grpc_deadline_state_destroy(grpc_call_element* elem) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
-  cancel_timer_if_needed(exec_ctx, deadline_state);
+  cancel_timer_if_needed(deadline_state);
 }
 
-void grpc_deadline_state_reset(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_deadline_state_reset(grpc_call_element* elem,
                                grpc_millis new_deadline) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
-  cancel_timer_if_needed(exec_ctx, deadline_state);
-  start_timer_if_needed(exec_ctx, elem, new_deadline);
+  cancel_timer_if_needed(deadline_state);
+  start_timer_if_needed(elem, new_deadline);
 }
 
 void grpc_deadline_state_client_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
   if (op->cancel_stream) {
-    cancel_timer_if_needed(exec_ctx, deadline_state);
+    cancel_timer_if_needed(deadline_state);
   } else {
     // Make sure we know when the call is complete, so that we can cancel
     // the timer.
@@ -237,16 +227,14 @@
 //
 
 // Constructor for channel_data.  Used for both client and server filters.
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   return GRPC_ERROR_NONE;
 }
 
 // Destructor for channel_data.  Used for both client and server filters.
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 // Call data used for both client and server filter.
 typedef struct base_call_data {
@@ -266,50 +254,45 @@
 } server_call_data;
 
 // Constructor for call_data.  Used for both client and server filters.
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  grpc_deadline_state_init(exec_ctx, elem, args->call_stack,
-                           args->call_combiner, args->deadline);
+  grpc_deadline_state_init(elem, args->call_stack, args->call_combiner,
+                           args->deadline);
   return GRPC_ERROR_NONE;
 }
 
 // Destructor for call_data.  Used for both client and server filters.
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  grpc_deadline_state_destroy(exec_ctx, elem);
+  grpc_deadline_state_destroy(elem);
 }
 
 // Method for starting a call op for client filter.
 static void client_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
-  grpc_deadline_state_client_start_transport_stream_op_batch(exec_ctx, elem,
-                                                             op);
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
+  grpc_deadline_state_client_start_transport_stream_op_batch(elem, op);
   // Chain to next filter.
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
 // Callback for receiving initial metadata on the server.
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   server_call_data* calld = (server_call_data*)elem->call_data;
   // Get deadline from metadata and start the timer if needed.
-  start_timer_if_needed(exec_ctx, elem, calld->recv_initial_metadata->deadline);
+  start_timer_if_needed(elem, calld->recv_initial_metadata->deadline);
   // Invoke the next callback.
   calld->next_recv_initial_metadata_ready->cb(
-      exec_ctx, calld->next_recv_initial_metadata_ready->cb_arg, error);
+      calld->next_recv_initial_metadata_ready->cb_arg, error);
 }
 
 // Method for starting a call op for server filter.
 static void server_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   server_call_data* calld = (server_call_data*)elem->call_data;
   if (op->cancel_stream) {
-    cancel_timer_if_needed(exec_ctx, &calld->base.deadline_state);
+    cancel_timer_if_needed(&calld->base.deadline_state);
   } else {
     // If we're receiving initial metadata, we need to get the deadline
     // from the recv_initial_metadata_ready callback.  So we inject our
@@ -335,7 +318,7 @@
     }
   }
   // Chain to next filter.
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
 const grpc_channel_filter grpc_client_deadline_filter = {
@@ -372,8 +355,7 @@
       !grpc_channel_args_want_minimal_stack(channel_args));
 }
 
-static bool maybe_add_deadline_filter(grpc_exec_ctx* exec_ctx,
-                                      grpc_channel_stack_builder* builder,
+static bool maybe_add_deadline_filter(grpc_channel_stack_builder* builder,
                                       void* arg) {
   return grpc_deadline_checking_enabled(
              grpc_channel_stack_builder_get_channel_arguments(builder))
diff --git a/src/core/ext/filters/deadline/deadline_filter.h b/src/core/ext/filters/deadline/deadline_filter.h
index 8d835d0..4de817e 100644
--- a/src/core/ext/filters/deadline/deadline_filter.h
+++ b/src/core/ext/filters/deadline/deadline_filter.h
@@ -49,13 +49,12 @@
 //
 
 // assumes elem->call_data is zero'd
-void grpc_deadline_state_init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_deadline_state_init(grpc_call_element* elem,
                               grpc_call_stack* call_stack,
                               grpc_call_combiner* call_combiner,
                               grpc_millis deadline);
 
-void grpc_deadline_state_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_element* elem);
+void grpc_deadline_state_destroy(grpc_call_element* elem);
 
 // Cancels the existing timer and starts a new one with new_deadline.
 //
@@ -66,7 +65,7 @@
 // deadline may result in the timer being called twice.
 //
 // Note: Must be called while holding the call combiner.
-void grpc_deadline_state_reset(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_deadline_state_reset(grpc_call_element* elem,
                                grpc_millis new_deadline);
 
 // To be called from the client-side filter's start_transport_stream_op_batch()
@@ -78,8 +77,7 @@
 //
 // Note: Must be called while holding the call combiner.
 void grpc_deadline_state_client_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op);
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op);
 
 // Should deadline checking be performed (according to channel args)
 bool grpc_deadline_checking_enabled(const grpc_channel_args* args);
diff --git a/src/core/ext/filters/http/client/http_client_filter.cc b/src/core/ext/filters/http/client/http_client_filter.cc
index a625369..a1fb10f 100644
--- a/src/core/ext/filters/http/client/http_client_filter.cc
+++ b/src/core/ext/filters/http/client/http_client_filter.cc
@@ -68,12 +68,11 @@
   size_t max_payload_size_for_get;
 } channel_data;
 
-static grpc_error* client_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
-                                                   grpc_call_element* elem,
+static grpc_error* client_filter_incoming_metadata(grpc_call_element* elem,
                                                    grpc_metadata_batch* b) {
   if (b->idx.named.status != nullptr) {
     if (grpc_mdelem_eq(b->idx.named.status->md, GRPC_MDELEM_STATUS_200)) {
-      grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.status);
+      grpc_metadata_batch_remove(b, b->idx.named.status);
     } else {
       char* val = grpc_dump_slice(GRPC_MDVALUE(b->idx.named.status->md),
                                   GPR_DUMP_ASCII);
@@ -98,10 +97,9 @@
         GRPC_MDVALUE(b->idx.named.grpc_message->md));
     if (grpc_slice_is_equivalent(pct_decoded_msg,
                                  GRPC_MDVALUE(b->idx.named.grpc_message->md))) {
-      grpc_slice_unref_internal(exec_ctx, pct_decoded_msg);
+      grpc_slice_unref_internal(pct_decoded_msg);
     } else {
-      grpc_metadata_batch_set_value(exec_ctx, b->idx.named.grpc_message,
-                                    pct_decoded_msg);
+      grpc_metadata_batch_set_value(b->idx.named.grpc_message, pct_decoded_msg);
     }
   }
 
@@ -131,60 +129,53 @@
         gpr_free(val);
       }
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.content_type);
+    grpc_metadata_batch_remove(b, b->idx.named.content_type);
   }
 
   return GRPC_ERROR_NONE;
 }
 
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx,
-                                        void* user_data, grpc_error* error) {
+static void recv_initial_metadata_ready(void* user_data, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (error == GRPC_ERROR_NONE) {
-    error = client_filter_incoming_metadata(exec_ctx, elem,
-                                            calld->recv_initial_metadata);
+    error = client_filter_incoming_metadata(elem, calld->recv_initial_metadata);
   } else {
     GRPC_ERROR_REF(error);
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_recv_initial_metadata_ready,
-                   error);
+  GRPC_CLOSURE_RUN(calld->original_recv_initial_metadata_ready, error);
 }
 
-static void recv_trailing_metadata_on_complete(grpc_exec_ctx* exec_ctx,
-                                               void* user_data,
+static void recv_trailing_metadata_on_complete(void* user_data,
                                                grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (error == GRPC_ERROR_NONE) {
-    error = client_filter_incoming_metadata(exec_ctx, elem,
-                                            calld->recv_trailing_metadata);
+    error =
+        client_filter_incoming_metadata(elem, calld->recv_trailing_metadata);
   } else {
     GRPC_ERROR_REF(error);
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_recv_trailing_metadata_on_complete,
-                   error);
+  GRPC_CLOSURE_RUN(calld->original_recv_trailing_metadata_on_complete, error);
 }
 
-static void send_message_on_complete(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void send_message_on_complete(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
-  grpc_byte_stream_cache_destroy(exec_ctx, &calld->send_message_cache);
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_send_message_on_complete,
+  grpc_byte_stream_cache_destroy(&calld->send_message_cache);
+  GRPC_CLOSURE_RUN(calld->original_send_message_on_complete,
                    GRPC_ERROR_REF(error));
 }
 
 // Pulls a slice from the send_message byte stream, updating
 // calld->send_message_bytes_read.
-static grpc_error* pull_slice_from_send_message(grpc_exec_ctx* exec_ctx,
-                                                call_data* calld) {
+static grpc_error* pull_slice_from_send_message(call_data* calld) {
   grpc_slice incoming_slice;
   grpc_error* error = grpc_byte_stream_pull(
-      exec_ctx, &calld->send_message_caching_stream.base, &incoming_slice);
+      &calld->send_message_caching_stream.base, &incoming_slice);
   if (error == GRPC_ERROR_NONE) {
     calld->send_message_bytes_read += GRPC_SLICE_LENGTH(incoming_slice);
-    grpc_slice_unref_internal(exec_ctx, incoming_slice);
+    grpc_slice_unref_internal(incoming_slice);
   }
   return error;
 }
@@ -194,12 +185,10 @@
 // calld->send_message_caching_stream.base.length, then we have completed
 // reading from the byte stream; otherwise, an async read has been dispatched
 // and on_send_message_next_done() will be invoked when it is complete.
-static grpc_error* read_all_available_send_message_data(grpc_exec_ctx* exec_ctx,
-                                                        call_data* calld) {
-  while (grpc_byte_stream_next(exec_ctx,
-                               &calld->send_message_caching_stream.base,
+static grpc_error* read_all_available_send_message_data(call_data* calld) {
+  while (grpc_byte_stream_next(&calld->send_message_caching_stream.base,
                                ~(size_t)0, &calld->on_send_message_next_done)) {
-    grpc_error* error = pull_slice_from_send_message(exec_ctx, calld);
+    grpc_error* error = pull_slice_from_send_message(calld);
     if (error != GRPC_ERROR_NONE) return error;
     if (calld->send_message_bytes_read ==
         calld->send_message_caching_stream.base.length) {
@@ -210,19 +199,18 @@
 }
 
 // Async callback for grpc_byte_stream_next().
-static void on_send_message_next_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void on_send_message_next_done(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->send_message_batch, error, calld->call_combiner);
+        calld->send_message_batch, error, calld->call_combiner);
     return;
   }
-  error = pull_slice_from_send_message(exec_ctx, calld);
+  error = pull_slice_from_send_message(calld);
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->send_message_batch, error, calld->call_combiner);
+        calld->send_message_batch, error, calld->call_combiner);
     return;
   }
   // There may or may not be more to read, but we don't care.  If we got
@@ -230,7 +218,7 @@
   // synchronously, so we were not able to do a cached call.  Instead,
   // we just reset the byte stream and then send down the batch as-is.
   grpc_caching_byte_stream_reset(&calld->send_message_caching_stream);
-  grpc_call_next_op(exec_ctx, elem, calld->send_message_batch);
+  grpc_call_next_op(elem, calld->send_message_batch);
 }
 
 static char* slice_buffer_to_string(grpc_slice_buffer* slice_buffer) {
@@ -248,8 +236,7 @@
 
 // Modifies the path entry in the batch's send_initial_metadata to
 // append the base64-encoded query for a GET request.
-static grpc_error* update_path_for_get(grpc_exec_ctx* exec_ctx,
-                                       grpc_call_element* elem,
+static grpc_error* update_path_for_get(grpc_call_element* elem,
                                        grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   grpc_slice path_slice =
@@ -282,24 +269,22 @@
       grpc_slice_sub_no_ref(path_with_query_slice, 0, strlen(t));
   /* substitute previous path with the new path+query */
   grpc_mdelem mdelem_path_and_query =
-      grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_PATH, path_with_query_slice);
+      grpc_mdelem_from_slices(GRPC_MDSTR_PATH, path_with_query_slice);
   grpc_metadata_batch* b =
       batch->payload->send_initial_metadata.send_initial_metadata;
-  return grpc_metadata_batch_substitute(exec_ctx, b, b->idx.named.path,
+  return grpc_metadata_batch_substitute(b, b->idx.named.path,
                                         mdelem_path_and_query);
 }
 
-static void remove_if_present(grpc_exec_ctx* exec_ctx,
-                              grpc_metadata_batch* batch,
+static void remove_if_present(grpc_metadata_batch* batch,
                               grpc_metadata_batch_callouts_index idx) {
   if (batch->idx.array[idx] != nullptr) {
-    grpc_metadata_batch_remove(exec_ctx, batch, batch->idx.array[idx]);
+    grpc_metadata_batch_remove(batch, batch->idx.array[idx]);
   }
 }
 
 static void hc_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* channeld = (channel_data*)elem->channel_data;
   GPR_TIMER_BEGIN("hc_start_transport_stream_op_batch", 0);
@@ -345,17 +330,16 @@
       calld->original_send_message_on_complete = batch->on_complete;
       batch->on_complete = &calld->send_message_on_complete;
       calld->send_message_batch = batch;
-      error = read_all_available_send_message_data(exec_ctx, calld);
+      error = read_all_available_send_message_data(calld);
       if (error != GRPC_ERROR_NONE) goto done;
       // If all the data has been read, then we can use GET.
       if (calld->send_message_bytes_read ==
           calld->send_message_caching_stream.base.length) {
         method = GRPC_MDELEM_METHOD_GET;
-        error = update_path_for_get(exec_ctx, elem, batch);
+        error = update_path_for_get(elem, batch);
         if (error != GRPC_ERROR_NONE) goto done;
         batch->send_message = false;
-        grpc_byte_stream_destroy(exec_ctx,
-                                 &calld->send_message_caching_stream.base);
+        grpc_byte_stream_destroy(&calld->send_message_caching_stream.base);
       } else {
         // Not all data is available.  The batch will be sent down
         // asynchronously in on_send_message_next_done().
@@ -372,41 +356,41 @@
     }
 
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_METHOD);
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_SCHEME);
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_TE);
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_CONTENT_TYPE);
     remove_if_present(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         GRPC_BATCH_USER_AGENT);
 
     /* Send : prefixed headers, which have to be before any application
        layer headers. */
     error = grpc_metadata_batch_add_head(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->method, method);
     if (error != GRPC_ERROR_NONE) goto done;
     error = grpc_metadata_batch_add_head(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->scheme, channeld->static_scheme);
     if (error != GRPC_ERROR_NONE) goto done;
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->te_trailers, GRPC_MDELEM_TE_TRAILERS);
     if (error != GRPC_ERROR_NONE) goto done;
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->content_type, GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC);
     if (error != GRPC_ERROR_NONE) goto done;
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, batch->payload->send_initial_metadata.send_initial_metadata,
+        batch->payload->send_initial_metadata.send_initial_metadata,
         &calld->user_agent, GRPC_MDELEM_REF(channeld->user_agent));
     if (error != GRPC_ERROR_NONE) goto done;
   }
@@ -414,16 +398,15 @@
 done:
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->send_message_batch, error, calld->call_combiner);
+        calld->send_message_batch, error, calld->call_combiner);
   } else if (!batch_will_be_handled_asynchronously) {
-    grpc_call_next_op(exec_ctx, elem, batch);
+    grpc_call_next_op(elem, batch);
   }
   GPR_TIMER_END("hc_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->call_combiner = args->call_combiner;
@@ -441,7 +424,7 @@
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
@@ -533,8 +516,7 @@
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   GPR_ASSERT(!args->is_last);
@@ -543,17 +525,16 @@
   chand->max_payload_size_for_get =
       max_payload_size_from_args(args->channel_args);
   chand->user_agent = grpc_mdelem_from_slices(
-      exec_ctx, GRPC_MDSTR_USER_AGENT,
+      GRPC_MDSTR_USER_AGENT,
       user_agent_from_args(args->channel_args,
                            args->optional_transport->vtable->name));
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  GRPC_MDELEM_UNREF(exec_ctx, chand->user_agent);
+  GRPC_MDELEM_UNREF(chand->user_agent);
 }
 
 const grpc_channel_filter grpc_http_client_filter = {
diff --git a/src/core/ext/filters/http/http_filters_plugin.cc b/src/core/ext/filters/http/http_filters_plugin.cc
index 483eb02..deec77c 100644
--- a/src/core/ext/filters/http/http_filters_plugin.cc
+++ b/src/core/ext/filters/http/http_filters_plugin.cc
@@ -40,8 +40,7 @@
   return t != nullptr && strstr(t->vtable->name, "http");
 }
 
-static bool maybe_add_optional_filter(grpc_exec_ctx* exec_ctx,
-                                      grpc_channel_stack_builder* builder,
+static bool maybe_add_optional_filter(grpc_channel_stack_builder* builder,
                                       void* arg) {
   if (!is_building_http_like_transport(builder)) return true;
   optional_filter* filtarg = (optional_filter*)arg;
@@ -55,8 +54,7 @@
                 : true;
 }
 
-static bool maybe_add_required_filter(grpc_exec_ctx* exec_ctx,
-                                      grpc_channel_stack_builder* builder,
+static bool maybe_add_required_filter(grpc_channel_stack_builder* builder,
                                       void* arg) {
   return is_building_http_like_transport(builder)
              ? grpc_channel_stack_builder_prepend_filter(
diff --git a/src/core/ext/filters/http/message_compress/message_compress_filter.cc b/src/core/ext/filters/http/message_compress/message_compress_filter.cc
index d070b56..9ae13d2 100644
--- a/src/core/ext/filters/http/message_compress/message_compress_filter.cc
+++ b/src/core/ext/filters/http/message_compress/message_compress_filter.cc
@@ -100,12 +100,11 @@
 
 /** Filter initial metadata */
 static grpc_error* process_send_initial_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_metadata_batch* initial_metadata,
+    grpc_call_element* elem, grpc_metadata_batch* initial_metadata,
     bool* has_compression_algorithm) GRPC_MUST_USE_RESULT;
 static grpc_error* process_send_initial_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_metadata_batch* initial_metadata, bool* has_compression_algorithm) {
+    grpc_call_element* elem, grpc_metadata_batch* initial_metadata,
+    bool* has_compression_algorithm) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* channeld = (channel_data*)elem->channel_data;
   *has_compression_algorithm = false;
@@ -137,13 +136,13 @@
     }
     *has_compression_algorithm = true;
     grpc_metadata_batch_remove(
-        exec_ctx, initial_metadata,
+        initial_metadata,
         initial_metadata->idx.named.grpc_internal_stream_encoding_request);
     /* Disable message-wise compression */
     calld->compression_algorithm = GRPC_COMPRESS_NONE;
     if (initial_metadata->idx.named.grpc_internal_encoding_request != nullptr) {
       grpc_metadata_batch_remove(
-          exec_ctx, initial_metadata,
+          initial_metadata,
           initial_metadata->idx.named.grpc_internal_encoding_request);
     }
   } else if (initial_metadata->idx.named.grpc_internal_encoding_request !=
@@ -160,7 +159,7 @@
     }
     *has_compression_algorithm = true;
     grpc_metadata_batch_remove(
-        exec_ctx, initial_metadata,
+        initial_metadata,
         initial_metadata->idx.named.grpc_internal_encoding_request);
   } else {
     /* If no algorithm was found in the metadata and we aren't
@@ -181,12 +180,11 @@
   /* hint compression algorithm */
   if (stream_compression_algorithm != GRPC_STREAM_COMPRESS_NONE) {
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, initial_metadata,
-        &calld->stream_compression_algorithm_storage,
+        initial_metadata, &calld->stream_compression_algorithm_storage,
         grpc_stream_compression_encoding_mdelem(stream_compression_algorithm));
   } else if (calld->compression_algorithm != GRPC_COMPRESS_NONE) {
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, initial_metadata, &calld->compression_algorithm_storage,
+        initial_metadata, &calld->compression_algorithm_storage,
         grpc_compression_encoding_mdelem(calld->compression_algorithm));
   }
 
@@ -194,7 +192,7 @@
 
   /* convey supported compression algorithms */
   error = grpc_metadata_batch_add_tail(
-      exec_ctx, initial_metadata, &calld->accept_encoding_storage,
+      initial_metadata, &calld->accept_encoding_storage,
       GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(
           channeld->supported_compression_algorithms));
 
@@ -203,7 +201,7 @@
   /* Do not overwrite accept-encoding header if it already presents. */
   if (!initial_metadata->idx.named.accept_encoding) {
     error = grpc_metadata_batch_add_tail(
-        exec_ctx, initial_metadata, &calld->accept_stream_encoding_storage,
+        initial_metadata, &calld->accept_stream_encoding_storage,
         GRPC_MDELEM_ACCEPT_STREAM_ENCODING_FOR_ALGORITHMS(
             channeld->supported_stream_compression_algorithms));
   }
@@ -211,17 +209,15 @@
   return error;
 }
 
-static void send_message_on_complete(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void send_message_on_complete(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &calld->slices);
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_send_message_on_complete,
+  grpc_slice_buffer_reset_and_unref_internal(&calld->slices);
+  GRPC_CLOSURE_RUN(calld->original_send_message_on_complete,
                    GRPC_ERROR_REF(error));
 }
 
-static void send_message_batch_continue(grpc_exec_ctx* exec_ctx,
-                                        grpc_call_element* elem) {
+static void send_message_batch_continue(grpc_call_element* elem) {
   call_data* calld = (call_data*)elem->call_data;
   // Note: The call to grpc_call_next_op() results in yielding the
   // call combiner, so we need to clear calld->send_message_batch
@@ -229,19 +225,18 @@
   grpc_transport_stream_op_batch* send_message_batch =
       calld->send_message_batch;
   calld->send_message_batch = nullptr;
-  grpc_call_next_op(exec_ctx, elem, send_message_batch);
+  grpc_call_next_op(elem, send_message_batch);
 }
 
-static void finish_send_message(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem) {
+static void finish_send_message(grpc_call_element* elem) {
   call_data* calld = (call_data*)elem->call_data;
   // Compress the data if appropriate.
   grpc_slice_buffer tmp;
   grpc_slice_buffer_init(&tmp);
   uint32_t send_flags =
       calld->send_message_batch->payload->send_message.send_message->flags;
-  bool did_compress = grpc_msg_compress(exec_ctx, calld->compression_algorithm,
-                                        &calld->slices, &tmp);
+  bool did_compress =
+      grpc_msg_compress(calld->compression_algorithm, &calld->slices, &tmp);
   if (did_compress) {
     if (grpc_compression_trace.enabled()) {
       const char* algo_name;
@@ -268,11 +263,11 @@
               algo_name, calld->slices.length);
     }
   }
-  grpc_slice_buffer_destroy_internal(exec_ctx, &tmp);
+  grpc_slice_buffer_destroy_internal(&tmp);
   // Swap out the original byte stream with our new one and send the
   // batch down.
   grpc_byte_stream_destroy(
-      exec_ctx, calld->send_message_batch->payload->send_message.send_message);
+      calld->send_message_batch->payload->send_message.send_message);
   grpc_slice_buffer_stream_init(&calld->replacement_stream, &calld->slices,
                                 send_flags);
   calld->send_message_batch->payload->send_message.send_message =
@@ -280,27 +275,24 @@
   calld->original_send_message_on_complete =
       calld->send_message_batch->on_complete;
   calld->send_message_batch->on_complete = &calld->send_message_on_complete;
-  send_message_batch_continue(exec_ctx, elem);
+  send_message_batch_continue(elem);
 }
 
-static void fail_send_message_batch_in_call_combiner(grpc_exec_ctx* exec_ctx,
-                                                     void* arg,
+static void fail_send_message_batch_in_call_combiner(void* arg,
                                                      grpc_error* error) {
   call_data* calld = (call_data*)arg;
   if (calld->send_message_batch != nullptr) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, calld->send_message_batch, GRPC_ERROR_REF(error),
-        calld->call_combiner);
+        calld->send_message_batch, GRPC_ERROR_REF(error), calld->call_combiner);
     calld->send_message_batch = nullptr;
   }
 }
 
 // Pulls a slice from the send_message byte stream and adds it to calld->slices.
-static grpc_error* pull_slice_from_send_message(grpc_exec_ctx* exec_ctx,
-                                                call_data* calld) {
+static grpc_error* pull_slice_from_send_message(call_data* calld) {
   grpc_slice incoming_slice;
   grpc_error* error = grpc_byte_stream_pull(
-      exec_ctx, calld->send_message_batch->payload->send_message.send_message,
+      calld->send_message_batch->payload->send_message.send_message,
       &incoming_slice);
   if (error == GRPC_ERROR_NONE) {
     grpc_slice_buffer_add(&calld->slices, incoming_slice);
@@ -312,69 +304,65 @@
 // If all data has been read, invokes finish_send_message().  Otherwise,
 // an async call to grpc_byte_stream_next() has been started, which will
 // eventually result in calling on_send_message_next_done().
-static void continue_reading_send_message(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem) {
+static void continue_reading_send_message(grpc_call_element* elem) {
   call_data* calld = (call_data*)elem->call_data;
   while (grpc_byte_stream_next(
-      exec_ctx, calld->send_message_batch->payload->send_message.send_message,
-      ~(size_t)0, &calld->on_send_message_next_done)) {
-    grpc_error* error = pull_slice_from_send_message(exec_ctx, calld);
+      calld->send_message_batch->payload->send_message.send_message, ~(size_t)0,
+      &calld->on_send_message_next_done)) {
+    grpc_error* error = pull_slice_from_send_message(calld);
     if (error != GRPC_ERROR_NONE) {
       // Closure callback; does not take ownership of error.
-      fail_send_message_batch_in_call_combiner(exec_ctx, calld, error);
+      fail_send_message_batch_in_call_combiner(calld, error);
       GRPC_ERROR_UNREF(error);
       return;
     }
     if (calld->slices.length ==
         calld->send_message_batch->payload->send_message.send_message->length) {
-      finish_send_message(exec_ctx, elem);
+      finish_send_message(elem);
       break;
     }
   }
 }
 
 // Async callback for grpc_byte_stream_next().
-static void on_send_message_next_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void on_send_message_next_done(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (error != GRPC_ERROR_NONE) {
     // Closure callback; does not take ownership of error.
-    fail_send_message_batch_in_call_combiner(exec_ctx, calld, error);
+    fail_send_message_batch_in_call_combiner(calld, error);
     return;
   }
-  error = pull_slice_from_send_message(exec_ctx, calld);
+  error = pull_slice_from_send_message(calld);
   if (error != GRPC_ERROR_NONE) {
     // Closure callback; does not take ownership of error.
-    fail_send_message_batch_in_call_combiner(exec_ctx, calld, error);
+    fail_send_message_batch_in_call_combiner(calld, error);
     GRPC_ERROR_UNREF(error);
     return;
   }
   if (calld->slices.length ==
       calld->send_message_batch->payload->send_message.send_message->length) {
-    finish_send_message(exec_ctx, elem);
+    finish_send_message(elem);
   } else {
-    continue_reading_send_message(exec_ctx, elem);
+    continue_reading_send_message(elem);
   }
 }
 
-static void start_send_message_batch(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* unused) {
+static void start_send_message_batch(void* arg, grpc_error* unused) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (skip_compression(
           elem,
           calld->send_message_batch->payload->send_message.send_message->flags,
           calld->send_initial_metadata_state == HAS_COMPRESSION_ALGORITHM)) {
-    send_message_batch_continue(exec_ctx, elem);
+    send_message_batch_continue(elem);
   } else {
-    continue_reading_send_message(exec_ctx, elem);
+    continue_reading_send_message(elem);
   }
 }
 
 static void compress_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   GPR_TIMER_BEGIN("compress_start_transport_stream_op_batch", 0);
   // Handle cancel_stream.
@@ -385,21 +373,19 @@
     if (calld->send_message_batch != nullptr) {
       if (calld->send_initial_metadata_state == INITIAL_METADATA_UNSEEN) {
         GRPC_CALL_COMBINER_START(
-            exec_ctx, calld->call_combiner,
+            calld->call_combiner,
             GRPC_CLOSURE_CREATE(fail_send_message_batch_in_call_combiner, calld,
                                 grpc_schedule_on_exec_ctx),
             GRPC_ERROR_REF(calld->cancel_error), "failing send_message op");
       } else {
         grpc_byte_stream_shutdown(
-            exec_ctx,
             calld->send_message_batch->payload->send_message.send_message,
             GRPC_ERROR_REF(calld->cancel_error));
       }
     }
   } else if (calld->cancel_error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, batch, GRPC_ERROR_REF(calld->cancel_error),
-        calld->call_combiner);
+        batch, GRPC_ERROR_REF(calld->cancel_error), calld->call_combiner);
     goto done;
   }
   // Handle send_initial_metadata.
@@ -407,11 +393,10 @@
     GPR_ASSERT(calld->send_initial_metadata_state == INITIAL_METADATA_UNSEEN);
     bool has_compression_algorithm;
     grpc_error* error = process_send_initial_metadata(
-        exec_ctx, elem,
-        batch->payload->send_initial_metadata.send_initial_metadata,
+        elem, batch->payload->send_initial_metadata.send_initial_metadata,
         &has_compression_algorithm);
     if (error != GRPC_ERROR_NONE) {
-      grpc_transport_stream_op_batch_finish_with_failure(exec_ctx, batch, error,
+      grpc_transport_stream_op_batch_finish_with_failure(batch, error,
                                                          calld->call_combiner);
       goto done;
     }
@@ -425,7 +410,7 @@
     // the call stack) will release the call combiner for each batch it sees.
     if (calld->send_message_batch != nullptr) {
       GRPC_CALL_COMBINER_START(
-          exec_ctx, calld->call_combiner,
+          calld->call_combiner,
           &calld->start_send_message_batch_in_call_combiner, GRPC_ERROR_NONE,
           "starting send_message after send_initial_metadata");
     }
@@ -440,22 +425,21 @@
     // send_initial_metadata.
     if (calld->send_initial_metadata_state == INITIAL_METADATA_UNSEEN) {
       GRPC_CALL_COMBINER_STOP(
-          exec_ctx, calld->call_combiner,
+          calld->call_combiner,
           "send_message batch pending send_initial_metadata");
       goto done;
     }
-    start_send_message_batch(exec_ctx, elem, GRPC_ERROR_NONE);
+    start_send_message_batch(elem, GRPC_ERROR_NONE);
   } else {
     // Pass control down the stack.
-    grpc_call_next_op(exec_ctx, elem, batch);
+    grpc_call_next_op(elem, batch);
   }
 done:
   GPR_TIMER_END("compress_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->call_combiner = args->call_combiner;
@@ -471,17 +455,16 @@
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
-  grpc_slice_buffer_destroy_internal(exec_ctx, &calld->slices);
+  grpc_slice_buffer_destroy_internal(&calld->slices);
   GRPC_ERROR_UNREF(calld->cancel_error);
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* channeld = (channel_data*)elem->channel_data;
 
@@ -531,8 +514,7 @@
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 const grpc_channel_filter grpc_message_compress_filter = {
     compress_start_transport_stream_op_batch,
diff --git a/src/core/ext/filters/http/server/http_server_filter.cc b/src/core/ext/filters/http/server/http_server_filter.cc
index 4f38979..b872dc9 100644
--- a/src/core/ext/filters/http/server/http_server_filter.cc
+++ b/src/core/ext/filters/http/server/http_server_filter.cc
@@ -66,8 +66,7 @@
   uint8_t unused;
 } channel_data;
 
-static grpc_error* server_filter_outgoing_metadata(grpc_exec_ctx* exec_ctx,
-                                                   grpc_call_element* elem,
+static grpc_error* server_filter_outgoing_metadata(grpc_call_element* elem,
                                                    grpc_metadata_batch* b) {
   if (b->idx.named.grpc_message != nullptr) {
     grpc_slice pct_encoded_msg = grpc_percent_encode_slice(
@@ -75,10 +74,9 @@
         grpc_compatible_percent_encoding_unreserved_bytes);
     if (grpc_slice_is_equivalent(pct_encoded_msg,
                                  GRPC_MDVALUE(b->idx.named.grpc_message->md))) {
-      grpc_slice_unref_internal(exec_ctx, pct_encoded_msg);
+      grpc_slice_unref_internal(pct_encoded_msg);
     } else {
-      grpc_metadata_batch_set_value(exec_ctx, b->idx.named.grpc_message,
-                                    pct_encoded_msg);
+      grpc_metadata_batch_set_value(b->idx.named.grpc_message, pct_encoded_msg);
     }
   }
   return GRPC_ERROR_NONE;
@@ -93,8 +91,7 @@
   *cumulative = grpc_error_add_child(*cumulative, new_err);
 }
 
-static grpc_error* server_filter_incoming_metadata(grpc_exec_ctx* exec_ctx,
-                                                   grpc_call_element* elem,
+static grpc_error* server_filter_incoming_metadata(grpc_call_element* elem,
                                                    grpc_metadata_batch* b) {
   call_data* calld = (call_data*)elem->call_data;
   grpc_error* error = GRPC_ERROR_NONE;
@@ -123,7 +120,7 @@
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("Bad header"),
                     b->idx.named.method->md));
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.method);
+    grpc_metadata_batch_remove(b, b->idx.named.method);
   } else {
     add_error(
         error_name, &error,
@@ -139,7 +136,7 @@
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("Bad header"),
                     b->idx.named.te->md));
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.te);
+    grpc_metadata_batch_remove(b, b->idx.named.te);
   } else {
     add_error(error_name, &error,
               grpc_error_set_str(
@@ -156,7 +153,7 @@
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("Bad header"),
                     b->idx.named.scheme->md));
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.scheme);
+    grpc_metadata_batch_remove(b, b->idx.named.scheme);
   } else {
     add_error(
         error_name, &error,
@@ -191,7 +188,7 @@
         gpr_free(val);
       }
     }
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.content_type);
+    grpc_metadata_batch_remove(b, b->idx.named.content_type);
   }
 
   if (b->idx.named.path == nullptr) {
@@ -218,22 +215,21 @@
 
       /* substitute path metadata with just the path (not query) */
       grpc_mdelem mdelem_path_without_query = grpc_mdelem_from_slices(
-          exec_ctx, GRPC_MDSTR_PATH, grpc_slice_sub(path_slice, 0, offset));
+          GRPC_MDSTR_PATH, grpc_slice_sub(path_slice, 0, offset));
 
-      grpc_metadata_batch_substitute(exec_ctx, b, b->idx.named.path,
+      grpc_metadata_batch_substitute(b, b->idx.named.path,
                                      mdelem_path_without_query);
 
       /* decode payload from query and add to the slice buffer to be returned */
       const int k_url_safe = 1;
-      grpc_slice_buffer_add(
-          &calld->read_slice_buffer,
-          grpc_base64_decode_with_len(
-              exec_ctx, (const char*)GRPC_SLICE_START_PTR(query_slice),
-              GRPC_SLICE_LENGTH(query_slice), k_url_safe));
+      grpc_slice_buffer_add(&calld->read_slice_buffer,
+                            grpc_base64_decode_with_len(
+                                (const char*)GRPC_SLICE_START_PTR(query_slice),
+                                GRPC_SLICE_LENGTH(query_slice), k_url_safe));
       grpc_slice_buffer_stream_init(&calld->read_stream,
                                     &calld->read_slice_buffer, 0);
       calld->seen_path_with_query = true;
-      grpc_slice_unref_internal(exec_ctx, query_slice);
+      grpc_slice_unref_internal(query_slice);
     } else {
       gpr_log(GPR_ERROR, "GET request without QUERY");
     }
@@ -242,14 +238,14 @@
   if (b->idx.named.host != nullptr && b->idx.named.authority == nullptr) {
     grpc_linked_mdelem* el = b->idx.named.host;
     grpc_mdelem md = GRPC_MDELEM_REF(el->md);
-    grpc_metadata_batch_remove(exec_ctx, b, el);
+    grpc_metadata_batch_remove(b, el);
     add_error(error_name, &error,
               grpc_metadata_batch_add_head(
-                  exec_ctx, b, el,
+                  b, el,
                   grpc_mdelem_from_slices(
-                      exec_ctx, GRPC_MDSTR_AUTHORITY,
+                      GRPC_MDSTR_AUTHORITY,
                       grpc_slice_ref_internal(GRPC_MDVALUE(md)))));
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   }
 
   if (b->idx.named.authority == nullptr) {
@@ -263,21 +259,18 @@
   return error;
 }
 
-static void hs_on_recv(grpc_exec_ctx* exec_ctx, void* user_data,
-                       grpc_error* err) {
+static void hs_on_recv(void* user_data, grpc_error* err) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (err == GRPC_ERROR_NONE) {
-    err = server_filter_incoming_metadata(exec_ctx, elem,
-                                          calld->recv_initial_metadata);
+    err = server_filter_incoming_metadata(elem, calld->recv_initial_metadata);
   } else {
     GRPC_ERROR_REF(err);
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->on_done_recv, err);
+  GRPC_CLOSURE_RUN(calld->on_done_recv, err);
 }
 
-static void hs_on_complete(grpc_exec_ctx* exec_ctx, void* user_data,
-                           grpc_error* err) {
+static void hs_on_complete(void* user_data, grpc_error* err) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   /* Call recv_message_ready if we got the payload via the path field */
@@ -287,17 +280,16 @@
                                   : (grpc_byte_stream*)&calld->read_stream;
     // Re-enter call combiner for recv_message_ready, since the surface
     // code will release the call combiner for each callback it receives.
-    GRPC_CALL_COMBINER_START(exec_ctx, calld->call_combiner,
-                             calld->recv_message_ready, GRPC_ERROR_REF(err),
+    GRPC_CALL_COMBINER_START(calld->call_combiner, calld->recv_message_ready,
+                             GRPC_ERROR_REF(err),
                              "resuming recv_message_ready from on_complete");
     calld->recv_message_ready = nullptr;
     calld->payload_bin_delivered = true;
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->on_complete, GRPC_ERROR_REF(err));
+  GRPC_CLOSURE_RUN(calld->on_complete, GRPC_ERROR_REF(err));
 }
 
-static void hs_recv_message_ready(grpc_exec_ctx* exec_ctx, void* user_data,
-                                  grpc_error* err) {
+static void hs_recv_message_ready(void* user_data, grpc_error* err) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (calld->seen_path_with_query) {
@@ -305,15 +297,14 @@
     // returned in hs_on_complete callback.
     // Note that we release the call combiner here, so that other
     // callbacks can run.
-    GRPC_CALL_COMBINER_STOP(exec_ctx, calld->call_combiner,
+    GRPC_CALL_COMBINER_STOP(calld->call_combiner,
                             "pausing recv_message_ready until on_complete");
   } else {
-    GRPC_CLOSURE_RUN(exec_ctx, calld->recv_message_ready, GRPC_ERROR_REF(err));
+    GRPC_CLOSURE_RUN(calld->recv_message_ready, GRPC_ERROR_REF(err));
   }
 }
 
-static grpc_error* hs_mutate_op(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem,
+static grpc_error* hs_mutate_op(grpc_call_element* elem,
                                 grpc_transport_stream_op_batch* op) {
   /* grab pointers to our data from the call element */
   call_data* calld = (call_data*)elem->call_data;
@@ -321,21 +312,19 @@
   if (op->send_initial_metadata) {
     grpc_error* error = GRPC_ERROR_NONE;
     static const char* error_name = "Failed sending initial metadata";
-    add_error(
-        error_name, &error,
-        grpc_metadata_batch_add_head(
-            exec_ctx, op->payload->send_initial_metadata.send_initial_metadata,
-            &calld->status, GRPC_MDELEM_STATUS_200));
-    add_error(
-        error_name, &error,
-        grpc_metadata_batch_add_tail(
-            exec_ctx, op->payload->send_initial_metadata.send_initial_metadata,
-            &calld->content_type,
-            GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC));
     add_error(error_name, &error,
-              server_filter_outgoing_metadata(
-                  exec_ctx, elem,
-                  op->payload->send_initial_metadata.send_initial_metadata));
+              grpc_metadata_batch_add_head(
+                  op->payload->send_initial_metadata.send_initial_metadata,
+                  &calld->status, GRPC_MDELEM_STATUS_200));
+    add_error(error_name, &error,
+              grpc_metadata_batch_add_tail(
+                  op->payload->send_initial_metadata.send_initial_metadata,
+                  &calld->content_type,
+                  GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC));
+    add_error(
+        error_name, &error,
+        server_filter_outgoing_metadata(
+            elem, op->payload->send_initial_metadata.send_initial_metadata));
     if (error != GRPC_ERROR_NONE) return error;
   }
 
@@ -367,8 +356,7 @@
 
   if (op->send_trailing_metadata) {
     grpc_error* error = server_filter_outgoing_metadata(
-        exec_ctx, elem,
-        op->payload->send_trailing_metadata.send_trailing_metadata);
+        elem, op->payload->send_trailing_metadata.send_trailing_metadata);
     if (error != GRPC_ERROR_NONE) return error;
   }
 
@@ -376,23 +364,21 @@
 }
 
 static void hs_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   call_data* calld = (call_data*)elem->call_data;
   GPR_TIMER_BEGIN("hs_start_transport_stream_op_batch", 0);
-  grpc_error* error = hs_mutate_op(exec_ctx, elem, op);
+  grpc_error* error = hs_mutate_op(elem, op);
   if (error != GRPC_ERROR_NONE) {
-    grpc_transport_stream_op_batch_finish_with_failure(exec_ctx, op, error,
+    grpc_transport_stream_op_batch_finish_with_failure(op, error,
                                                        calld->call_combiner);
   } else {
-    grpc_call_next_op(exec_ctx, elem, op);
+    grpc_call_next_op(elem, op);
   }
   GPR_TIMER_END("hs_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   /* grab pointers to our data from the call element */
   call_data* calld = (call_data*)elem->call_data;
@@ -409,24 +395,22 @@
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
-  grpc_slice_buffer_destroy_internal(exec_ctx, &calld->read_slice_buffer);
+  grpc_slice_buffer_destroy_internal(&calld->read_slice_buffer);
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 const grpc_channel_filter grpc_http_server_filter = {
     hs_start_transport_stream_op_batch,
diff --git a/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc b/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
index 762198f..f50a928 100644
--- a/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
+++ b/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
@@ -54,8 +54,7 @@
   intptr_t id; /**< an id unique to the channel */
 } channel_data;
 
-static void on_initial_md_ready(grpc_exec_ctx* exec_ctx, void* user_data,
-                                grpc_error* err) {
+static void on_initial_md_ready(void* user_data, grpc_error* err) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
 
@@ -73,20 +72,19 @@
           GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.lb_token->md));
       calld->have_initial_md_string = true;
       grpc_metadata_batch_remove(
-          exec_ctx, calld->recv_initial_metadata,
+          calld->recv_initial_metadata,
           calld->recv_initial_metadata->idx.named.lb_token);
     }
   } else {
     GRPC_ERROR_REF(err);
   }
   calld->ops_recv_initial_metadata_ready->cb(
-      exec_ctx, calld->ops_recv_initial_metadata_ready->cb_arg, err);
+      calld->ops_recv_initial_metadata_ready->cb_arg, err);
   GRPC_ERROR_UNREF(err);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->id = (intptr_t)args->call_stack;
@@ -108,7 +106,7 @@
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
@@ -125,19 +123,18 @@
   */
 
   if (calld->have_initial_md_string) {
-    grpc_slice_unref_internal(exec_ctx, calld->initial_md_string);
+    grpc_slice_unref_internal(calld->initial_md_string);
   }
   if (calld->have_trailing_md_string) {
-    grpc_slice_unref_internal(exec_ctx, calld->trailing_md_string);
+    grpc_slice_unref_internal(calld->trailing_md_string);
   }
   if (calld->have_service_method) {
-    grpc_slice_unref_internal(exec_ctx, calld->service_method);
+    grpc_slice_unref_internal(calld->service_method);
   }
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
 
@@ -158,8 +155,7 @@
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   /* TODO(dgq): do something with the data
   channel_data *chand = elem->channel_data;
   grpc_load_reporting_call_data lr_call_data = {
@@ -173,8 +169,7 @@
   */
 }
 
-static grpc_filtered_mdelem lr_trailing_md_filter(grpc_exec_ctx* exec_ctx,
-                                                  void* user_data,
+static grpc_filtered_mdelem lr_trailing_md_filter(void* user_data,
                                                   grpc_mdelem md) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -186,8 +181,7 @@
 }
 
 static void lr_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   GPR_TIMER_BEGIN("lr_start_transport_stream_op_batch", 0);
   call_data* calld = (call_data*)elem->call_data;
 
@@ -203,12 +197,11 @@
     GRPC_LOG_IF_ERROR(
         "grpc_metadata_batch_filter",
         grpc_metadata_batch_filter(
-            exec_ctx,
             op->payload->send_trailing_metadata.send_trailing_metadata,
             lr_trailing_md_filter, elem,
             "LR trailing metadata filtering error"));
   }
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 
   GPR_TIMER_END("lr_start_transport_stream_op_batch", 0);
 }
diff --git a/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc b/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
index accb779..9d1dfcb 100644
--- a/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
+++ b/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
@@ -38,7 +38,7 @@
 }
 
 static bool maybe_add_server_load_reporting_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   const grpc_channel_filter* filter = (const grpc_channel_filter*)arg;
diff --git a/src/core/ext/filters/max_age/max_age_filter.cc b/src/core/ext/filters/max_age/max_age_filter.cc
index 917fbd9..0499c6e 100644
--- a/src/core/ext/filters/max_age/max_age_filter.cc
+++ b/src/core/ext/filters/max_age/max_age_filter.cc
@@ -88,73 +88,69 @@
 
 /* Increase the nubmer of active calls. Before the increasement, if there are no
    calls, the max_idle_timer should be cancelled. */
-static void increase_call_count(grpc_exec_ctx* exec_ctx, channel_data* chand) {
+static void increase_call_count(channel_data* chand) {
   if (gpr_atm_full_fetch_add(&chand->call_count, 1) == 0) {
-    grpc_timer_cancel(exec_ctx, &chand->max_idle_timer);
+    grpc_timer_cancel(&chand->max_idle_timer);
   }
 }
 
 /* Decrease the nubmer of active calls. After the decrement, if there are no
    calls, the max_idle_timer should be started. */
-static void decrease_call_count(grpc_exec_ctx* exec_ctx, channel_data* chand) {
+static void decrease_call_count(channel_data* chand) {
   if (gpr_atm_full_fetch_add(&chand->call_count, -1) == 1) {
     GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_idle_timer");
-    grpc_timer_init(exec_ctx, &chand->max_idle_timer,
-                    grpc_exec_ctx_now(exec_ctx) + chand->max_connection_idle,
-                    &chand->close_max_idle_channel);
+    grpc_timer_init(
+        &chand->max_idle_timer,
+        grpc_core::ExecCtx::Get()->Now() + chand->max_connection_idle,
+        &chand->close_max_idle_channel);
   }
 }
 
-static void start_max_idle_timer_after_init(grpc_exec_ctx* exec_ctx, void* arg,
-                                            grpc_error* error) {
+static void start_max_idle_timer_after_init(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   /* Decrease call_count. If there are no active calls at this time,
      max_idle_timer will start here. If the number of active calls is not 0,
      max_idle_timer will start after all the active calls end. */
-  decrease_call_count(exec_ctx, chand);
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
+  decrease_call_count(chand);
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack,
                            "max_age start_max_idle_timer_after_init");
 }
 
-static void start_max_age_timer_after_init(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void start_max_age_timer_after_init(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_timer_pending = true;
   GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_age_timer");
-  grpc_timer_init(exec_ctx, &chand->max_age_timer,
-                  grpc_exec_ctx_now(exec_ctx) + chand->max_connection_age,
+  grpc_timer_init(&chand->max_age_timer,
+                  grpc_core::ExecCtx::Get()->Now() + chand->max_connection_age,
                   &chand->close_max_age_channel);
   gpr_mu_unlock(&chand->max_age_timer_mu);
   grpc_transport_op* op = grpc_make_transport_op(nullptr);
   op->on_connectivity_state_change = &chand->channel_connectivity_changed;
   op->connectivity_state = &chand->connectivity_state;
-  grpc_channel_next_op(exec_ctx,
-                       grpc_channel_stack_element(chand->channel_stack, 0), op);
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
+  grpc_channel_next_op(grpc_channel_stack_element(chand->channel_stack, 0), op);
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack,
                            "max_age start_max_age_timer_after_init");
 }
 
-static void start_max_age_grace_timer_after_goaway_op(grpc_exec_ctx* exec_ctx,
-                                                      void* arg,
+static void start_max_age_grace_timer_after_goaway_op(void* arg,
                                                       grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_grace_timer_pending = true;
   GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_age_grace_timer");
   grpc_timer_init(
-      exec_ctx, &chand->max_age_grace_timer,
+      &chand->max_age_grace_timer,
       chand->max_connection_age_grace == GRPC_MILLIS_INF_FUTURE
           ? GRPC_MILLIS_INF_FUTURE
-          : grpc_exec_ctx_now(exec_ctx) + chand->max_connection_age_grace,
+          : grpc_core::ExecCtx::Get()->Now() + chand->max_connection_age_grace,
       &chand->force_close_max_age_channel);
   gpr_mu_unlock(&chand->max_age_timer_mu);
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack,
                            "max_age start_max_age_grace_timer_after_goaway_op");
 }
 
-static void close_max_idle_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void close_max_idle_channel(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   if (error == GRPC_ERROR_NONE) {
     /* Prevent the max idle timer from being set again */
@@ -165,16 +161,14 @@
                            GRPC_ERROR_INT_HTTP2_ERROR, GRPC_HTTP2_NO_ERROR);
     grpc_channel_element* elem =
         grpc_channel_stack_element(chand->channel_stack, 0);
-    elem->filter->start_transport_op(exec_ctx, elem, op);
+    elem->filter->start_transport_op(elem, op);
   } else if (error != GRPC_ERROR_CANCELLED) {
     GRPC_LOG_IF_ERROR("close_max_idle_channel", error);
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
-                           "max_age max_idle_timer");
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack, "max_age max_idle_timer");
 }
 
-static void close_max_age_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                                  grpc_error* error) {
+static void close_max_age_channel(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_timer_pending = false;
@@ -189,16 +183,14 @@
                            GRPC_ERROR_INT_HTTP2_ERROR, GRPC_HTTP2_NO_ERROR);
     grpc_channel_element* elem =
         grpc_channel_stack_element(chand->channel_stack, 0);
-    elem->filter->start_transport_op(exec_ctx, elem, op);
+    elem->filter->start_transport_op(elem, op);
   } else if (error != GRPC_ERROR_CANCELLED) {
     GRPC_LOG_IF_ERROR("close_max_age_channel", error);
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
-                           "max_age max_age_timer");
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack, "max_age max_age_timer");
 }
 
-static void force_close_max_age_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void force_close_max_age_channel(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_grace_timer_pending = false;
@@ -209,38 +201,36 @@
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel reaches max age");
     grpc_channel_element* elem =
         grpc_channel_stack_element(chand->channel_stack, 0);
-    elem->filter->start_transport_op(exec_ctx, elem, op);
+    elem->filter->start_transport_op(elem, op);
   } else if (error != GRPC_ERROR_CANCELLED) {
     GRPC_LOG_IF_ERROR("force_close_max_age_channel", error);
   }
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack,
-                           "max_age max_age_grace_timer");
+  GRPC_CHANNEL_STACK_UNREF(chand->channel_stack, "max_age max_age_grace_timer");
 }
 
-static void channel_connectivity_changed(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error) {
+static void channel_connectivity_changed(void* arg, grpc_error* error) {
   channel_data* chand = (channel_data*)arg;
   if (chand->connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
     grpc_transport_op* op = grpc_make_transport_op(nullptr);
     op->on_connectivity_state_change = &chand->channel_connectivity_changed;
     op->connectivity_state = &chand->connectivity_state;
-    grpc_channel_next_op(
-        exec_ctx, grpc_channel_stack_element(chand->channel_stack, 0), op);
+    grpc_channel_next_op(grpc_channel_stack_element(chand->channel_stack, 0),
+                         op);
   } else {
     gpr_mu_lock(&chand->max_age_timer_mu);
     if (chand->max_age_timer_pending) {
-      grpc_timer_cancel(exec_ctx, &chand->max_age_timer);
+      grpc_timer_cancel(&chand->max_age_timer);
       chand->max_age_timer_pending = false;
     }
     if (chand->max_age_grace_timer_pending) {
-      grpc_timer_cancel(exec_ctx, &chand->max_age_grace_timer);
+      grpc_timer_cancel(&chand->max_age_grace_timer);
       chand->max_age_grace_timer_pending = false;
     }
     gpr_mu_unlock(&chand->max_age_timer_mu);
     /* If there are no active calls, this increasement will cancel
        max_idle_timer, and prevent max_idle_timer from being started in the
        future. */
-    increase_call_count(exec_ctx, chand);
+    increase_call_count(chand);
   }
 }
 
@@ -263,25 +253,23 @@
 }
 
 /* Constructor for call_data. */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  increase_call_count(exec_ctx, chand);
+  increase_call_count(chand);
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for call_data. */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  decrease_call_count(exec_ctx, chand);
+  decrease_call_count(chand);
 }
 
 /* Constructor for channel_data. */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   gpr_mu_init(&chand->max_age_timer_mu);
@@ -351,8 +339,7 @@
        initialization is done. */
     GRPC_CHANNEL_STACK_REF(chand->channel_stack,
                            "max_age start_max_age_timer_after_init");
-    GRPC_CLOSURE_SCHED(exec_ctx, &chand->start_max_age_timer_after_init,
-                       GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&chand->start_max_age_timer_after_init, GRPC_ERROR_NONE);
   }
 
   /* Initialize the number of calls as 1, so that the max_idle_timer will not
@@ -361,15 +348,14 @@
   if (chand->max_connection_idle != GRPC_MILLIS_INF_FUTURE) {
     GRPC_CHANNEL_STACK_REF(chand->channel_stack,
                            "max_age start_max_idle_timer_after_init");
-    GRPC_CLOSURE_SCHED(exec_ctx, &chand->start_max_idle_timer_after_init,
+    GRPC_CLOSURE_SCHED(&chand->start_max_idle_timer_after_init,
                        GRPC_ERROR_NONE);
   }
   return GRPC_ERROR_NONE;
 }
 
 /* Destructor for channel_data. */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 const grpc_channel_filter grpc_max_age_filter = {
     grpc_call_next_op,
@@ -384,8 +370,7 @@
     grpc_channel_next_get_info,
     "max_age"};
 
-static bool maybe_add_max_age_filter(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_stack_builder* builder,
+static bool maybe_add_max_age_filter(grpc_channel_stack_builder* builder,
                                      void* arg) {
   const grpc_channel_args* channel_args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
diff --git a/src/core/ext/filters/message_size/message_size_filter.cc b/src/core/ext/filters/message_size/message_size_filter.cc
index 3d2252a..f8487f9 100644
--- a/src/core/ext/filters/message_size/message_size_filter.cc
+++ b/src/core/ext/filters/message_size/message_size_filter.cc
@@ -47,8 +47,7 @@
   return value;
 }
 
-static void refcounted_message_size_limits_unref(grpc_exec_ctx* exec_ctx,
-                                                 void* value) {
+static void refcounted_message_size_limits_unref(void* value) {
   refcounted_message_size_limits* limits =
       (refcounted_message_size_limits*)value;
   if (gpr_unref(&limits->refs)) {
@@ -108,8 +107,7 @@
 
 // Callback invoked when we receive a message.  Here we check the max
 // receive message size.
-static void recv_message_ready(grpc_exec_ctx* exec_ctx, void* user_data,
-                               grpc_error* error) {
+static void recv_message_ready(void* user_data, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
   if (*calld->recv_message != nullptr && calld->limits.max_recv_size >= 0 &&
@@ -132,13 +130,12 @@
     GRPC_ERROR_REF(error);
   }
   // Invoke the next callback.
-  GRPC_CLOSURE_RUN(exec_ctx, calld->next_recv_message_ready, error);
+  GRPC_CLOSURE_RUN(calld->next_recv_message_ready, error);
 }
 
 // Start transport stream op.
 static void start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   call_data* calld = (call_data*)elem->call_data;
   // Check max send message size.
   if (op->send_message && calld->limits.max_send_size >= 0 &&
@@ -149,7 +146,7 @@
                  op->payload->send_message.send_message->length,
                  calld->limits.max_send_size);
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, op,
+        op,
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_COPIED_STRING(message_string),
                            GRPC_ERROR_INT_GRPC_STATUS,
                            GRPC_STATUS_RESOURCE_EXHAUSTED),
@@ -165,12 +162,11 @@
     op->payload->recv_message.recv_message_ready = &calld->recv_message_ready;
   }
   // Chain to the next filter.
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
 // Constructor for call_data.
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -186,7 +182,7 @@
   if (chand->method_limit_table != nullptr) {
     refcounted_message_size_limits* limits =
         (refcounted_message_size_limits*)grpc_method_config_table_get(
-            exec_ctx, chand->method_limit_table, args->path);
+            chand->method_limit_table, args->path);
     if (limits != nullptr) {
       if (limits->limits.max_send_size >= 0 &&
           (limits->limits.max_send_size < calld->limits.max_send_size ||
@@ -204,7 +200,7 @@
 }
 
 // Destructor for call_data.
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
@@ -241,8 +237,7 @@
 }
 
 // Constructor for channel_data.
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -257,8 +252,7 @@
     if (service_config != nullptr) {
       chand->method_limit_table =
           grpc_service_config_create_method_config_table(
-              exec_ctx, service_config,
-              refcounted_message_size_limits_create_from_json,
+              service_config, refcounted_message_size_limits_create_from_json,
               refcounted_message_size_limits_ref,
               refcounted_message_size_limits_unref);
       grpc_service_config_destroy(service_config);
@@ -268,10 +262,9 @@
 }
 
 // Destructor for channel_data.
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  grpc_slice_hash_table_unref(exec_ctx, chand->method_limit_table);
+  grpc_slice_hash_table_unref(chand->method_limit_table);
 }
 
 const grpc_channel_filter grpc_message_size_filter = {
@@ -287,8 +280,7 @@
     grpc_channel_next_get_info,
     "message_size"};
 
-static bool maybe_add_message_size_filter(grpc_exec_ctx* exec_ctx,
-                                          grpc_channel_stack_builder* builder,
+static bool maybe_add_message_size_filter(grpc_channel_stack_builder* builder,
                                           void* arg) {
   const grpc_channel_args* channel_args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
diff --git a/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
index 4ab1ee4..555a913 100644
--- a/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
+++ b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
@@ -50,8 +50,7 @@
 }
 
 // Callback invoked when we receive an initial metadata.
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx,
-                                        void* user_data, grpc_error* error) {
+static void recv_initial_metadata_ready(void* user_data, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
 
@@ -67,14 +66,13 @@
   }
 
   // Invoke the next callback.
-  GRPC_CLOSURE_RUN(exec_ctx, calld->next_recv_initial_metadata_ready,
+  GRPC_CLOSURE_RUN(calld->next_recv_initial_metadata_ready,
                    GRPC_ERROR_REF(error));
 }
 
 // Start transport stream op.
 static void start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   call_data* calld = (call_data*)elem->call_data;
 
   // Inject callback for receiving initial metadata
@@ -96,12 +94,11 @@
   }
 
   // Chain to the next filter.
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
 // Constructor for call_data.
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->next_recv_initial_metadata_ready = nullptr;
@@ -113,20 +110,18 @@
 }
 
 // Destructor for call_data.
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
 // Constructor for channel_data.
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
 // Destructor for channel_data.
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 // Parse the user agent
 static bool parse_user_agent(grpc_mdelem md) {
@@ -181,7 +176,7 @@
     "workaround_cronet_compression"};
 
 static bool register_workaround_cronet_compression(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* channel_args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   const grpc_arg* a = grpc_channel_args_find(
diff --git a/src/core/ext/transport/chttp2/client/chttp2_connector.cc b/src/core/ext/transport/chttp2/client/chttp2_connector.cc
index 77cc313..db5962e 100644
--- a/src/core/ext/transport/chttp2/client/chttp2_connector.cc
+++ b/src/core/ext/transport/chttp2/client/chttp2_connector.cc
@@ -61,38 +61,34 @@
   gpr_ref(&c->refs);
 }
 
-static void chttp2_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_connector* con) {
+static void chttp2_connector_unref(grpc_connector* con) {
   chttp2_connector* c = (chttp2_connector*)con;
   if (gpr_unref(&c->refs)) {
     gpr_mu_destroy(&c->mu);
     // If handshaking is not yet in progress, destroy the endpoint.
     // Otherwise, the handshaker will do this for us.
-    if (c->endpoint != nullptr) grpc_endpoint_destroy(exec_ctx, c->endpoint);
+    if (c->endpoint != nullptr) grpc_endpoint_destroy(c->endpoint);
     gpr_free(c);
   }
 }
 
-static void chttp2_connector_shutdown(grpc_exec_ctx* exec_ctx,
-                                      grpc_connector* con, grpc_error* why) {
+static void chttp2_connector_shutdown(grpc_connector* con, grpc_error* why) {
   chttp2_connector* c = (chttp2_connector*)con;
   gpr_mu_lock(&c->mu);
   c->shutdown = true;
   if (c->handshake_mgr != nullptr) {
-    grpc_handshake_manager_shutdown(exec_ctx, c->handshake_mgr,
-                                    GRPC_ERROR_REF(why));
+    grpc_handshake_manager_shutdown(c->handshake_mgr, GRPC_ERROR_REF(why));
   }
   // If handshaking is not yet in progress, shutdown the endpoint.
   // Otherwise, the handshaker will do this for us.
   if (!c->connecting && c->endpoint != nullptr) {
-    grpc_endpoint_shutdown(exec_ctx, c->endpoint, GRPC_ERROR_REF(why));
+    grpc_endpoint_shutdown(c->endpoint, GRPC_ERROR_REF(why));
   }
   gpr_mu_unlock(&c->mu);
   GRPC_ERROR_UNREF(why);
 }
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
   chttp2_connector* c = (chttp2_connector*)args->user_data;
   gpr_mu_lock(&c->mu);
@@ -105,48 +101,71 @@
       // before destroying them, even if we know that there are no
       // pending read/write callbacks.  This should be fixed, at which
       // point this can be removed.
-      grpc_endpoint_shutdown(exec_ctx, args->endpoint, GRPC_ERROR_REF(error));
-      grpc_endpoint_destroy(exec_ctx, args->endpoint);
-      grpc_channel_args_destroy(exec_ctx, args->args);
-      grpc_slice_buffer_destroy_internal(exec_ctx, args->read_buffer);
+      grpc_endpoint_shutdown(args->endpoint, GRPC_ERROR_REF(error));
+      grpc_endpoint_destroy(args->endpoint);
+      grpc_channel_args_destroy(args->args);
+      grpc_slice_buffer_destroy_internal(args->read_buffer);
       gpr_free(args->read_buffer);
     } else {
       error = GRPC_ERROR_REF(error);
     }
     memset(c->result, 0, sizeof(*c->result));
   } else {
-    grpc_endpoint_delete_from_pollset_set(exec_ctx, args->endpoint,
+    grpc_endpoint_delete_from_pollset_set(args->endpoint,
                                           c->args.interested_parties);
     c->result->transport =
-        grpc_create_chttp2_transport(exec_ctx, args->args, args->endpoint, 1);
+        grpc_create_chttp2_transport(args->args, args->endpoint, true);
     GPR_ASSERT(c->result->transport);
-    grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport,
-                                        args->read_buffer);
+    // TODO(roth): We ideally want to wait until we receive HTTP/2
+    // settings from the server before we consider the connection
+    // established.  If that doesn't happen before the connection
+    // timeout expires, then we should consider the connection attempt a
+    // failure and feed that information back into the backoff code.
+    // We could pass a notify_on_receive_settings callback to
+    // grpc_chttp2_transport_start_reading() to let us know when
+    // settings are received, but we would need to figure out how to use
+    // that information here.
+    //
+    // Unfortunately, we don't currently have a way to split apart the two
+    // effects of scheduling c->notify: we start sending RPCs immediately
+    // (which we want to do) and we consider the connection attempt successful
+    // (which we don't want to do until we get the notify_on_receive_settings
+    // callback from the transport).  If we could split those things
+    // apart, then we could start sending RPCs but then wait for our
+    // timeout before deciding if the connection attempt is successful.
+    // If the attempt is not successful, then we would tear down the
+    // transport and feed the failure back into the backoff code.
+    //
+    // In addition, even if we did that, we would probably not want to do
+    // so until after transparent retries is implemented.  Otherwise, any
+    // RPC that we attempt to send on the connection before the timeout
+    // would fail instead of being retried on a subsequent attempt.
+    grpc_chttp2_transport_start_reading(c->result->transport, args->read_buffer,
+                                        nullptr);
     c->result->channel_args = args->args;
   }
   grpc_closure* notify = c->notify;
   c->notify = nullptr;
-  GRPC_CLOSURE_SCHED(exec_ctx, notify, error);
-  grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
+  GRPC_CLOSURE_SCHED(notify, error);
+  grpc_handshake_manager_destroy(c->handshake_mgr);
   c->handshake_mgr = nullptr;
   gpr_mu_unlock(&c->mu);
-  chttp2_connector_unref(exec_ctx, (grpc_connector*)c);
+  chttp2_connector_unref((grpc_connector*)c);
 }
 
-static void start_handshake_locked(grpc_exec_ctx* exec_ctx,
-                                   chttp2_connector* c) {
+static void start_handshake_locked(chttp2_connector* c) {
   c->handshake_mgr = grpc_handshake_manager_create();
-  grpc_handshakers_add(exec_ctx, HANDSHAKER_CLIENT, c->args.channel_args,
+  grpc_handshakers_add(HANDSHAKER_CLIENT, c->args.channel_args,
                        c->handshake_mgr);
-  grpc_endpoint_add_to_pollset_set(exec_ctx, c->endpoint,
-                                   c->args.interested_parties);
+  grpc_endpoint_add_to_pollset_set(c->endpoint, c->args.interested_parties);
   grpc_handshake_manager_do_handshake(
-      exec_ctx, c->handshake_mgr, c->endpoint, c->args.channel_args,
-      c->args.deadline, nullptr /* acceptor */, on_handshake_done, c);
+      c->handshake_mgr, c->args.interested_parties, c->endpoint,
+      c->args.channel_args, c->args.deadline, nullptr /* acceptor */,
+      on_handshake_done, c);
   c->endpoint = nullptr;  // Endpoint handed off to handshake manager.
 }
 
-static void connected(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void connected(void* arg, grpc_error* error) {
   chttp2_connector* c = (chttp2_connector*)arg;
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(c->connecting);
@@ -160,27 +179,26 @@
     memset(c->result, 0, sizeof(*c->result));
     grpc_closure* notify = c->notify;
     c->notify = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, notify, error);
+    GRPC_CLOSURE_SCHED(notify, error);
     if (c->endpoint != nullptr) {
-      grpc_endpoint_shutdown(exec_ctx, c->endpoint, GRPC_ERROR_REF(error));
+      grpc_endpoint_shutdown(c->endpoint, GRPC_ERROR_REF(error));
     }
     gpr_mu_unlock(&c->mu);
-    chttp2_connector_unref(exec_ctx, (grpc_connector*)arg);
+    chttp2_connector_unref((grpc_connector*)arg);
   } else {
     GPR_ASSERT(c->endpoint != nullptr);
-    start_handshake_locked(exec_ctx, c);
+    start_handshake_locked(c);
     gpr_mu_unlock(&c->mu);
   }
 }
 
-static void chttp2_connector_connect(grpc_exec_ctx* exec_ctx,
-                                     grpc_connector* con,
+static void chttp2_connector_connect(grpc_connector* con,
                                      const grpc_connect_in_args* args,
                                      grpc_connect_out_args* result,
                                      grpc_closure* notify) {
   chttp2_connector* c = (chttp2_connector*)con;
   grpc_resolved_address addr;
-  grpc_get_subchannel_address_arg(exec_ctx, args->channel_args, &addr);
+  grpc_get_subchannel_address_arg(args->channel_args, &addr);
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(c->notify == nullptr);
   c->notify = notify;
@@ -191,9 +209,8 @@
   GRPC_CLOSURE_INIT(&c->connected, connected, c, grpc_schedule_on_exec_ctx);
   GPR_ASSERT(!c->connecting);
   c->connecting = true;
-  grpc_tcp_client_connect(exec_ctx, &c->connected, &c->endpoint,
-                          args->interested_parties, args->channel_args, &addr,
-                          args->deadline);
+  grpc_tcp_client_connect(&c->connected, &c->endpoint, args->interested_parties,
+                          args->channel_args, &addr, args->deadline);
   gpr_mu_unlock(&c->mu);
 }
 
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create.cc b/src/core/ext/transport/chttp2/client/insecure/channel_create.cc
index 028b69e..6a1b709 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create.cc
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create.cc
@@ -34,21 +34,19 @@
     grpc_client_channel_factory* cc_factory) {}
 
 static void client_channel_factory_unref(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory) {}
+    grpc_client_channel_factory* cc_factory) {}
 
 static grpc_subchannel* client_channel_factory_create_subchannel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory,
-    const grpc_subchannel_args* args) {
+    grpc_client_channel_factory* cc_factory, const grpc_subchannel_args* args) {
   grpc_connector* connector = grpc_chttp2_connector_create();
-  grpc_subchannel* s = grpc_subchannel_create(exec_ctx, connector, args);
-  grpc_connector_unref(exec_ctx, connector);
+  grpc_subchannel* s = grpc_subchannel_create(connector, args);
+  grpc_connector_unref(connector);
   return s;
 }
 
 static grpc_channel* client_channel_factory_create_channel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory,
-    const char* target, grpc_client_channel_type type,
-    const grpc_channel_args* args) {
+    grpc_client_channel_factory* cc_factory, const char* target,
+    grpc_client_channel_type type, const grpc_channel_args* args) {
   if (target == nullptr) {
     gpr_log(GPR_ERROR, "cannot create channel with NULL target name");
     return nullptr;
@@ -56,14 +54,14 @@
   // Add channel arg containing the server URI.
   grpc_arg arg = grpc_channel_arg_string_create(
       (char*)GRPC_ARG_SERVER_URI,
-      grpc_resolver_factory_add_default_prefix_if_needed(exec_ctx, target));
+      grpc_resolver_factory_add_default_prefix_if_needed(target));
   const char* to_remove[] = {GRPC_ARG_SERVER_URI};
   grpc_channel_args* new_args =
       grpc_channel_args_copy_and_add_and_remove(args, to_remove, 1, &arg, 1);
   gpr_free(arg.value.string);
-  grpc_channel* channel = grpc_channel_create(exec_ctx, target, new_args,
-                                              GRPC_CLIENT_CHANNEL, nullptr);
-  grpc_channel_args_destroy(exec_ctx, new_args);
+  grpc_channel* channel =
+      grpc_channel_create(target, new_args, GRPC_CLIENT_CHANNEL, nullptr);
+  grpc_channel_args_destroy(new_args);
   return channel;
 }
 
@@ -82,7 +80,7 @@
 grpc_channel* grpc_insecure_channel_create(const char* target,
                                            const grpc_channel_args* args,
                                            void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE(
       "grpc_insecure_channel_create(target=%s, args=%p, reserved=%p)", 3,
       (target, args, reserved));
@@ -93,11 +91,11 @@
   grpc_channel_args* new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
   // Create channel.
   grpc_channel* channel = client_channel_factory_create_channel(
-      &exec_ctx, &client_channel_factory, target,
-      GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args);
+      &client_channel_factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR,
+      new_args);
   // Clean up.
-  grpc_channel_args_destroy(&exec_ctx, new_args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(new_args);
+
   return channel != nullptr ? channel
                             : grpc_lame_client_channel_create(
                                   target, GRPC_STATUS_INTERNAL,
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc b/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc
index e748d28..0cdea5a 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create_posix.cc
@@ -37,7 +37,7 @@
 
 grpc_channel* grpc_insecure_channel_create_from_fd(
     const char* target, int fd, const grpc_channel_args* args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE("grpc_insecure_channel_create(target=%p, fd=%d, args=%p)", 3,
                  (target, fd, args));
 
@@ -50,17 +50,17 @@
   GPR_ASSERT(fcntl(fd, F_SETFL, flags | O_NONBLOCK) == 0);
 
   grpc_endpoint* client = grpc_tcp_client_create_from_fd(
-      &exec_ctx, grpc_fd_create(fd, "client"), args, "fd-client");
+      grpc_fd_create(fd, "client"), args, "fd-client");
 
   grpc_transport* transport =
-      grpc_create_chttp2_transport(&exec_ctx, final_args, client, 1);
+      grpc_create_chttp2_transport(final_args, client, true);
   GPR_ASSERT(transport);
   grpc_channel* channel = grpc_channel_create(
-      &exec_ctx, target, final_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
-  grpc_channel_args_destroy(&exec_ctx, final_args);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
+      target, final_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  grpc_channel_args_destroy(final_args);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   return channel != nullptr ? channel
                             : grpc_lame_client_channel_create(
@@ -73,7 +73,7 @@
 grpc_channel* grpc_insecure_channel_create_from_fd(
     const char* target, int fd, const grpc_channel_args* args) {
   GPR_ASSERT(0);
-  return NULL;
+  return nullptr;
 }
 
 #endif  // GPR_SUPPORT_CHANNELS_FROM_FD
diff --git a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
index dd2bc42..27c5b96 100644
--- a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
+++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
@@ -41,10 +41,10 @@
     grpc_client_channel_factory* cc_factory) {}
 
 static void client_channel_factory_unref(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory) {}
+    grpc_client_channel_factory* cc_factory) {}
 
 static grpc_subchannel_args* get_secure_naming_subchannel_args(
-    grpc_exec_ctx* exec_ctx, const grpc_subchannel_args* args) {
+    const grpc_subchannel_args* args) {
   grpc_channel_credentials* channel_credentials =
       grpc_channel_credentials_find_in_args(args->args);
   if (channel_credentials == nullptr) {
@@ -68,7 +68,7 @@
   const char* server_uri_str = server_uri_arg->value.string;
   GPR_ASSERT(server_uri_str != nullptr);
   grpc_uri* server_uri =
-      grpc_uri_parse(exec_ctx, server_uri_str, true /* supress errors */);
+      grpc_uri_parse(server_uri_str, true /* supress errors */);
   GPR_ASSERT(server_uri != nullptr);
   const char* server_uri_path;
   server_uri_path =
@@ -81,7 +81,7 @@
     const char* target_uri_str =
         grpc_get_subchannel_address_uri_arg(args->args);
     grpc_uri* target_uri =
-        grpc_uri_parse(exec_ctx, target_uri_str, false /* suppress errors */);
+        grpc_uri_parse(target_uri_str, false /* suppress errors */);
     GPR_ASSERT(target_uri != nullptr);
     if (target_uri->path[0] != '\0') {  // "path" may be empty
       const grpc_slice key = grpc_slice_from_static_string(
@@ -89,7 +89,7 @@
       const char* value =
           (const char*)grpc_slice_hash_table_get(targets_info, key);
       if (value != nullptr) target_name_to_check = gpr_strdup(value);
-      grpc_slice_unref_internal(exec_ctx, key);
+      grpc_slice_unref_internal(key);
     }
     if (target_name_to_check == nullptr) {
       // If the target name to check hasn't already been set, fall back to using
@@ -107,7 +107,7 @@
   grpc_channel_args* new_args_from_connector = nullptr;
   const grpc_security_status security_status =
       grpc_channel_credentials_create_security_connector(
-          exec_ctx, channel_credentials, target_name_to_check, args->args,
+          channel_credentials, target_name_to_check, args->args,
           &subchannel_security_connector, &new_args_from_connector);
   if (security_status != GRPC_SECURITY_OK) {
     gpr_log(GPR_ERROR,
@@ -123,10 +123,10 @@
   grpc_channel_args* new_args = grpc_channel_args_copy_and_add(
       new_args_from_connector != nullptr ? new_args_from_connector : args->args,
       &new_security_connector_arg, 1);
-  GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, &subchannel_security_connector->base,
+  GRPC_SECURITY_CONNECTOR_UNREF(&subchannel_security_connector->base,
                                 "lb_channel_create");
   if (new_args_from_connector != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, new_args_from_connector);
+    grpc_channel_args_destroy(new_args_from_connector);
   }
   grpc_subchannel_args* final_sc_args =
       (grpc_subchannel_args*)gpr_malloc(sizeof(*final_sc_args));
@@ -136,10 +136,9 @@
 }
 
 static grpc_subchannel* client_channel_factory_create_subchannel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory,
-    const grpc_subchannel_args* args) {
+    grpc_client_channel_factory* cc_factory, const grpc_subchannel_args* args) {
   grpc_subchannel_args* subchannel_args =
-      get_secure_naming_subchannel_args(exec_ctx, args);
+      get_secure_naming_subchannel_args(args);
   if (subchannel_args == nullptr) {
     gpr_log(
         GPR_ERROR,
@@ -147,19 +146,16 @@
     return nullptr;
   }
   grpc_connector* connector = grpc_chttp2_connector_create();
-  grpc_subchannel* s =
-      grpc_subchannel_create(exec_ctx, connector, subchannel_args);
-  grpc_connector_unref(exec_ctx, connector);
-  grpc_channel_args_destroy(exec_ctx,
-                            (grpc_channel_args*)subchannel_args->args);
+  grpc_subchannel* s = grpc_subchannel_create(connector, subchannel_args);
+  grpc_connector_unref(connector);
+  grpc_channel_args_destroy((grpc_channel_args*)subchannel_args->args);
   gpr_free(subchannel_args);
   return s;
 }
 
 static grpc_channel* client_channel_factory_create_channel(
-    grpc_exec_ctx* exec_ctx, grpc_client_channel_factory* cc_factory,
-    const char* target, grpc_client_channel_type type,
-    const grpc_channel_args* args) {
+    grpc_client_channel_factory* cc_factory, const char* target,
+    grpc_client_channel_type type, const grpc_channel_args* args) {
   if (target == nullptr) {
     gpr_log(GPR_ERROR, "cannot create channel with NULL target name");
     return nullptr;
@@ -167,14 +163,14 @@
   // Add channel arg containing the server URI.
   grpc_arg arg = grpc_channel_arg_string_create(
       (char*)GRPC_ARG_SERVER_URI,
-      grpc_resolver_factory_add_default_prefix_if_needed(exec_ctx, target));
+      grpc_resolver_factory_add_default_prefix_if_needed(target));
   const char* to_remove[] = {GRPC_ARG_SERVER_URI};
   grpc_channel_args* new_args =
       grpc_channel_args_copy_and_add_and_remove(args, to_remove, 1, &arg, 1);
   gpr_free(arg.value.string);
-  grpc_channel* channel = grpc_channel_create(exec_ctx, target, new_args,
-                                              GRPC_CLIENT_CHANNEL, nullptr);
-  grpc_channel_args_destroy(exec_ctx, new_args);
+  grpc_channel* channel =
+      grpc_channel_create(target, new_args, GRPC_CLIENT_CHANNEL, nullptr);
+  grpc_channel_args_destroy(new_args);
   return channel;
 }
 
@@ -194,7 +190,7 @@
                                          const char* target,
                                          const grpc_channel_args* args,
                                          void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE(
       "grpc_secure_channel_create(creds=%p, target=%s, args=%p, "
       "reserved=%p)",
@@ -211,11 +207,10 @@
         args, args_to_add, GPR_ARRAY_SIZE(args_to_add));
     // Create channel.
     channel = client_channel_factory_create_channel(
-        &exec_ctx, &client_channel_factory, target,
-        GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args);
+        &client_channel_factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR,
+        new_args);
     // Clean up.
-    grpc_channel_args_destroy(&exec_ctx, new_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_channel_args_destroy(new_args);
   }
   return channel != nullptr ? channel
                             : grpc_lame_client_channel_create(
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.cc b/src/core/ext/transport/chttp2/server/chttp2_server.cc
index 93be5e4..5669fa4 100644
--- a/src/core/ext/transport/chttp2/server/chttp2_server.cc
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.cc
@@ -21,6 +21,7 @@
 #include <grpc/grpc.h>
 
 #include <inttypes.h>
+#include <limits.h>
 #include <string.h>
 
 #include <grpc/support/alloc.h>
@@ -31,6 +32,7 @@
 
 #include "src/core/ext/filters/http/server/http_server_filter.h"
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/handshaker.h"
 #include "src/core/lib/channel/handshaker_registry.h"
@@ -53,14 +55,52 @@
 } server_state;
 
 typedef struct {
+  gpr_refcount refs;
   server_state* svr_state;
   grpc_pollset* accepting_pollset;
   grpc_tcp_server_acceptor* acceptor;
   grpc_handshake_manager* handshake_mgr;
+  // State for enforcing handshake timeout on receiving HTTP/2 settings.
+  grpc_chttp2_transport* transport;
+  grpc_millis deadline;
+  grpc_timer timer;
+  grpc_closure on_timeout;
+  grpc_closure on_receive_settings;
 } server_connection_state;
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void server_connection_state_unref(
+    server_connection_state* connection_state) {
+  if (gpr_unref(&connection_state->refs)) {
+    if (connection_state->transport != nullptr) {
+      GRPC_CHTTP2_UNREF_TRANSPORT(connection_state->transport,
+                                  "receive settings timeout");
+    }
+    gpr_free(connection_state);
+  }
+}
+
+static void on_timeout(void* arg, grpc_error* error) {
+  server_connection_state* connection_state = (server_connection_state*)arg;
+  // Note that we may be called with GRPC_ERROR_NONE when the timer fires
+  // or with an error indicating that the timer system is being shut down.
+  if (error != GRPC_ERROR_CANCELLED) {
+    grpc_transport_op* op = grpc_make_transport_op(nullptr);
+    op->disconnect_with_error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+        "Did not receive HTTP/2 settings before handshake timeout");
+    grpc_transport_perform_op(&connection_state->transport->base, op);
+  }
+  server_connection_state_unref(connection_state);
+}
+
+static void on_receive_settings(void* arg, grpc_error* error) {
+  server_connection_state* connection_state = (server_connection_state*)arg;
+  if (error == GRPC_ERROR_NONE) {
+    grpc_timer_cancel(&connection_state->timer);
+  }
+  server_connection_state_unref(connection_state);
+}
+
+static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
   server_connection_state* connection_state =
       (server_connection_state*)args->user_data;
@@ -68,7 +108,6 @@
   if (error != GRPC_ERROR_NONE || connection_state->svr_state->shutdown) {
     const char* error_str = grpc_error_string(error);
     gpr_log(GPR_DEBUG, "Handshaking failed: %s", error_str);
-
     if (error == GRPC_ERROR_NONE && args->endpoint != nullptr) {
       // We were shut down after handshaking completed successfully, so
       // destroy the endpoint here.
@@ -76,10 +115,10 @@
       // before destroying them, even if we know that there are no
       // pending read/write callbacks.  This should be fixed, at which
       // point this can be removed.
-      grpc_endpoint_shutdown(exec_ctx, args->endpoint, GRPC_ERROR_NONE);
-      grpc_endpoint_destroy(exec_ctx, args->endpoint);
-      grpc_channel_args_destroy(exec_ctx, args->args);
-      grpc_slice_buffer_destroy_internal(exec_ctx, args->read_buffer);
+      grpc_endpoint_shutdown(args->endpoint, GRPC_ERROR_NONE);
+      grpc_endpoint_destroy(args->endpoint);
+      grpc_channel_args_destroy(args->args);
+      grpc_slice_buffer_destroy_internal(args->read_buffer);
       gpr_free(args->read_buffer);
     }
   } else {
@@ -88,34 +127,48 @@
     // code, so we can just clean up here without creating a transport.
     if (args->endpoint != nullptr) {
       grpc_transport* transport =
-          grpc_create_chttp2_transport(exec_ctx, args->args, args->endpoint, 0);
+          grpc_create_chttp2_transport(args->args, args->endpoint, false);
       grpc_server_setup_transport(
-          exec_ctx, connection_state->svr_state->server, transport,
+          connection_state->svr_state->server, transport,
           connection_state->accepting_pollset, args->args);
-      grpc_chttp2_transport_start_reading(exec_ctx, transport,
-                                          args->read_buffer);
-      grpc_channel_args_destroy(exec_ctx, args->args);
+      // Use notify_on_receive_settings callback to enforce the
+      // handshake deadline.
+      connection_state->transport = (grpc_chttp2_transport*)transport;
+      gpr_ref(&connection_state->refs);
+      GRPC_CLOSURE_INIT(&connection_state->on_receive_settings,
+                        on_receive_settings, connection_state,
+                        grpc_schedule_on_exec_ctx);
+      grpc_chttp2_transport_start_reading(
+          transport, args->read_buffer, &connection_state->on_receive_settings);
+      grpc_channel_args_destroy(args->args);
+      gpr_ref(&connection_state->refs);
+      GRPC_CHTTP2_REF_TRANSPORT((grpc_chttp2_transport*)transport,
+                                "receive settings timeout");
+      GRPC_CLOSURE_INIT(&connection_state->on_timeout, on_timeout,
+                        connection_state, grpc_schedule_on_exec_ctx);
+      grpc_timer_init(&connection_state->timer, connection_state->deadline,
+                      &connection_state->on_timeout);
     }
   }
   grpc_handshake_manager_pending_list_remove(
       &connection_state->svr_state->pending_handshake_mgrs,
       connection_state->handshake_mgr);
   gpr_mu_unlock(&connection_state->svr_state->mu);
-  grpc_handshake_manager_destroy(exec_ctx, connection_state->handshake_mgr);
-  grpc_tcp_server_unref(exec_ctx, connection_state->svr_state->tcp_server);
+  grpc_handshake_manager_destroy(connection_state->handshake_mgr);
   gpr_free(connection_state->acceptor);
-  gpr_free(connection_state);
+  grpc_tcp_server_unref(connection_state->svr_state->tcp_server);
+  server_connection_state_unref(connection_state);
 }
 
-static void on_accept(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
+static void on_accept(void* arg, grpc_endpoint* tcp,
                       grpc_pollset* accepting_pollset,
                       grpc_tcp_server_acceptor* acceptor) {
   server_state* state = (server_state*)arg;
   gpr_mu_lock(&state->mu);
   if (state->shutdown) {
     gpr_mu_unlock(&state->mu);
-    grpc_endpoint_shutdown(exec_ctx, tcp, GRPC_ERROR_NONE);
-    grpc_endpoint_destroy(exec_ctx, tcp);
+    grpc_endpoint_shutdown(tcp, GRPC_ERROR_NONE);
+    grpc_endpoint_destroy(tcp);
     gpr_free(acceptor);
     return;
   }
@@ -125,60 +178,62 @@
   gpr_mu_unlock(&state->mu);
   grpc_tcp_server_ref(state->tcp_server);
   server_connection_state* connection_state =
-      (server_connection_state*)gpr_malloc(sizeof(*connection_state));
+      (server_connection_state*)gpr_zalloc(sizeof(*connection_state));
+  gpr_ref_init(&connection_state->refs, 1);
   connection_state->svr_state = state;
   connection_state->accepting_pollset = accepting_pollset;
   connection_state->acceptor = acceptor;
   connection_state->handshake_mgr = handshake_mgr;
-  grpc_handshakers_add(exec_ctx, HANDSHAKER_SERVER, state->args,
+  grpc_handshakers_add(HANDSHAKER_SERVER, state->args,
                        connection_state->handshake_mgr);
-  // TODO(roth): We should really get this timeout value from channel
-  // args instead of hard-coding it.
-  const grpc_millis deadline =
-      grpc_exec_ctx_now(exec_ctx) + 120 * GPR_MS_PER_SEC;
-  grpc_handshake_manager_do_handshake(exec_ctx, connection_state->handshake_mgr,
-                                      tcp, state->args, deadline, acceptor,
-                                      on_handshake_done, connection_state);
+  const grpc_arg* timeout_arg =
+      grpc_channel_args_find(state->args, GRPC_ARG_SERVER_HANDSHAKE_TIMEOUT_MS);
+  connection_state->deadline =
+      grpc_core::ExecCtx::Get()->Now() +
+      grpc_channel_arg_get_integer(timeout_arg,
+                                   {120 * GPR_MS_PER_SEC, 1, INT_MAX});
+  grpc_handshake_manager_do_handshake(
+      connection_state->handshake_mgr, nullptr /* interested_parties */, tcp,
+      state->args, connection_state->deadline, acceptor, on_handshake_done,
+      connection_state);
 }
 
 /* Server callback: start listening on our ports */
-static void server_start_listener(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                                  void* arg, grpc_pollset** pollsets,
+static void server_start_listener(grpc_server* server, void* arg,
+                                  grpc_pollset** pollsets,
                                   size_t pollset_count) {
   server_state* state = (server_state*)arg;
   gpr_mu_lock(&state->mu);
   state->shutdown = false;
   gpr_mu_unlock(&state->mu);
-  grpc_tcp_server_start(exec_ctx, state->tcp_server, pollsets, pollset_count,
-                        on_accept, state);
+  grpc_tcp_server_start(state->tcp_server, pollsets, pollset_count, on_accept,
+                        state);
 }
 
-static void tcp_server_shutdown_complete(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error) {
+static void tcp_server_shutdown_complete(void* arg, grpc_error* error) {
   server_state* state = (server_state*)arg;
   /* ensure all threads have unlocked */
   gpr_mu_lock(&state->mu);
   grpc_closure* destroy_done = state->server_destroy_listener_done;
   GPR_ASSERT(state->shutdown);
   grpc_handshake_manager_pending_list_shutdown_all(
-      exec_ctx, state->pending_handshake_mgrs, GRPC_ERROR_REF(error));
+      state->pending_handshake_mgrs, GRPC_ERROR_REF(error));
   gpr_mu_unlock(&state->mu);
   // Flush queued work before destroying handshaker factory, since that
   // may do a synchronous unref.
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   if (destroy_done != nullptr) {
-    destroy_done->cb(exec_ctx, destroy_done->cb_arg, GRPC_ERROR_REF(error));
-    grpc_exec_ctx_flush(exec_ctx);
+    destroy_done->cb(destroy_done->cb_arg, GRPC_ERROR_REF(error));
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_channel_args_destroy(exec_ctx, state->args);
+  grpc_channel_args_destroy(state->args);
   gpr_mu_destroy(&state->mu);
   gpr_free(state);
 }
 
 /* Server callback: destroy the tcp listener (so we don't generate further
    callbacks) */
-static void server_destroy_listener(grpc_exec_ctx* exec_ctx,
-                                    grpc_server* server, void* arg,
+static void server_destroy_listener(grpc_server* server, void* arg,
                                     grpc_closure* destroy_done) {
   server_state* state = (server_state*)arg;
   gpr_mu_lock(&state->mu);
@@ -186,12 +241,11 @@
   state->server_destroy_listener_done = destroy_done;
   grpc_tcp_server* tcp_server = state->tcp_server;
   gpr_mu_unlock(&state->mu);
-  grpc_tcp_server_shutdown_listeners(exec_ctx, tcp_server);
-  grpc_tcp_server_unref(exec_ctx, tcp_server);
+  grpc_tcp_server_shutdown_listeners(tcp_server);
+  grpc_tcp_server_unref(tcp_server);
 }
 
-grpc_error* grpc_chttp2_server_add_port(grpc_exec_ctx* exec_ctx,
-                                        grpc_server* server, const char* addr,
+grpc_error* grpc_chttp2_server_add_port(grpc_server* server, const char* addr,
                                         grpc_channel_args* args,
                                         int* port_num) {
   grpc_resolved_addresses* resolved = nullptr;
@@ -215,8 +269,8 @@
   GRPC_CLOSURE_INIT(&state->tcp_server_shutdown_complete,
                     tcp_server_shutdown_complete, state,
                     grpc_schedule_on_exec_ctx);
-  err = grpc_tcp_server_create(exec_ctx, &state->tcp_server_shutdown_complete,
-                               args, &tcp_server);
+  err = grpc_tcp_server_create(&state->tcp_server_shutdown_complete, args,
+                               &tcp_server);
   if (err != GRPC_ERROR_NONE) {
     goto error;
   }
@@ -265,7 +319,7 @@
   grpc_resolved_addresses_destroy(resolved);
 
   /* Register with the server only upon success */
-  grpc_server_add_listener(exec_ctx, server, state, server_start_listener,
+  grpc_server_add_listener(server, state, server_start_listener,
                            server_destroy_listener);
   goto done;
 
@@ -276,9 +330,9 @@
     grpc_resolved_addresses_destroy(resolved);
   }
   if (tcp_server) {
-    grpc_tcp_server_unref(exec_ctx, tcp_server);
+    grpc_tcp_server_unref(tcp_server);
   } else {
-    grpc_channel_args_destroy(exec_ctx, args);
+    grpc_channel_args_destroy(args);
     gpr_free(state);
   }
   *port_num = 0;
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.h b/src/core/ext/transport/chttp2/server/chttp2_server.h
index 68304fd..7de859d 100644
--- a/src/core/ext/transport/chttp2/server/chttp2_server.h
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.h
@@ -25,8 +25,7 @@
 
 /// Adds a port to \a server.  Sets \a port_num to the port number.
 /// Takes ownership of \a args.
-grpc_error* grpc_chttp2_server_add_port(grpc_exec_ctx* exec_ctx,
-                                        grpc_server* server, const char* addr,
+grpc_error* grpc_chttp2_server_add_port(grpc_server* server, const char* addr,
                                         grpc_channel_args* args, int* port_num);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_SERVER_CHTTP2_SERVER_H */
diff --git a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc
index 8984896..52c42d0 100644
--- a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc
@@ -26,12 +26,12 @@
 #include "src/core/lib/surface/server.h"
 
 int grpc_server_add_insecure_http2_port(grpc_server* server, const char* addr) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   int port_num = 0;
   GRPC_API_TRACE("grpc_server_add_insecure_http2_port(server=%p, addr=%s)", 2,
                  (server, addr));
   grpc_error* err = grpc_chttp2_server_add_port(
-      &exec_ctx, server, addr,
+      server, addr,
       grpc_channel_args_copy(grpc_server_get_channel_args(server)), &port_num);
   if (err != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(err);
@@ -39,6 +39,6 @@
 
     GRPC_ERROR_UNREF(err);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return port_num;
 }
diff --git a/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc b/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc
index 007d1be..dafd4af 100644
--- a/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2_posix.cc
@@ -38,32 +38,29 @@
                                               void* reserved, int fd) {
   GPR_ASSERT(reserved == nullptr);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   char* name;
   gpr_asprintf(&name, "fd:%d", fd);
 
-  grpc_endpoint* server_endpoint =
-      grpc_tcp_create(&exec_ctx, grpc_fd_create(fd, name),
-                      grpc_server_get_channel_args(server), name);
+  grpc_endpoint* server_endpoint = grpc_tcp_create(
+      grpc_fd_create(fd, name), grpc_server_get_channel_args(server), name);
 
   gpr_free(name);
 
   const grpc_channel_args* server_args = grpc_server_get_channel_args(server);
   grpc_transport* transport = grpc_create_chttp2_transport(
-      &exec_ctx, server_args, server_endpoint, 0 /* is_client */);
+      server_args, server_endpoint, false /* is_client */);
 
   grpc_pollset** pollsets;
   size_t num_pollsets = 0;
   grpc_server_get_pollsets(server, &pollsets, &num_pollsets);
 
   for (size_t i = 0; i < num_pollsets; i++) {
-    grpc_endpoint_add_to_pollset(&exec_ctx, server_endpoint, pollsets[i]);
+    grpc_endpoint_add_to_pollset(server_endpoint, pollsets[i]);
   }
 
-  grpc_server_setup_transport(&exec_ctx, server, transport, nullptr,
-                              server_args);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_server_setup_transport(server, transport, nullptr, server_args);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 #else  // !GPR_SUPPORT_CHANNELS_FROM_FD
diff --git a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc
index ac3ea40..723af97 100644
--- a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc
+++ b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.cc
@@ -36,7 +36,7 @@
 
 int grpc_server_add_secure_http2_port(grpc_server* server, const char* addr,
                                       grpc_server_credentials* creds) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_error* err = GRPC_ERROR_NONE;
   grpc_server_security_connector* sc = nullptr;
   int port_num = 0;
@@ -52,8 +52,7 @@
         "No credentials specified for secure server port (creds==NULL)");
     goto done;
   }
-  status =
-      grpc_server_credentials_create_security_connector(&exec_ctx, creds, &sc);
+  status = grpc_server_credentials_create_security_connector(creds, &sc);
   if (status != GRPC_SECURITY_OK) {
     char* msg;
     gpr_asprintf(&msg,
@@ -72,12 +71,12 @@
       grpc_channel_args_copy_and_add(grpc_server_get_channel_args(server),
                                      args_to_add, GPR_ARRAY_SIZE(args_to_add));
   // Add server port.
-  err = grpc_chttp2_server_add_port(&exec_ctx, server, addr, args, &port_num);
+  err = grpc_chttp2_server_add_port(server, addr, args, &port_num);
 done:
   if (sc != nullptr) {
-    GRPC_SECURITY_CONNECTOR_UNREF(&exec_ctx, &sc->base, "server");
+    GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "server");
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   if (err != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(err);
     gpr_log(GPR_ERROR, "%s", msg);
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.cc b/src/core/ext/transport/chttp2/transport/bin_decoder.cc
index 3ccae7a..984cd4c 100644
--- a/src/core/ext/transport/chttp2/transport/bin_decoder.cc
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.cc
@@ -130,8 +130,7 @@
   return true;
 }
 
-grpc_slice grpc_chttp2_base64_decode(grpc_exec_ctx* exec_ctx,
-                                     grpc_slice input) {
+grpc_slice grpc_chttp2_base64_decode(grpc_slice input) {
   size_t input_length = GRPC_SLICE_LENGTH(input);
   size_t output_length = input_length / 4 * 3;
   struct grpc_base64_decode_context ctx;
@@ -167,7 +166,7 @@
     char* s = grpc_slice_to_c_string(input);
     gpr_log(GPR_ERROR, "Base64 decoding failed, input string:\n%s\n", s);
     gpr_free(s);
-    grpc_slice_unref_internal(exec_ctx, output);
+    grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
   GPR_ASSERT(ctx.output_cur == GRPC_SLICE_END_PTR(output));
@@ -175,8 +174,7 @@
   return output;
 }
 
-grpc_slice grpc_chttp2_base64_decode_with_length(grpc_exec_ctx* exec_ctx,
-                                                 grpc_slice input,
+grpc_slice grpc_chttp2_base64_decode_with_length(grpc_slice input,
                                                  size_t output_length) {
   size_t input_length = GRPC_SLICE_LENGTH(input);
   grpc_slice output = GRPC_SLICE_MALLOC(output_length);
@@ -189,7 +187,7 @@
             "grpc_chttp2_base64_decode_with_length has a length of %d, which "
             "has a tail of 1 byte.\n",
             (int)input_length);
-    grpc_slice_unref_internal(exec_ctx, output);
+    grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
 
@@ -199,7 +197,7 @@
             "than the max possible output length %d.\n",
             (int)output_length,
             (int)(input_length / 4 * 3 + tail_xtra[input_length % 4]));
-    grpc_slice_unref_internal(exec_ctx, output);
+    grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
 
@@ -213,7 +211,7 @@
     char* s = grpc_slice_to_c_string(input);
     gpr_log(GPR_ERROR, "Base64 decoding failed, input string:\n%s\n", s);
     gpr_free(s);
-    grpc_slice_unref_internal(exec_ctx, output);
+    grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
   GPR_ASSERT(ctx.output_cur == GRPC_SLICE_END_PTR(output));
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.h b/src/core/ext/transport/chttp2/transport/bin_decoder.h
index a78c305..9cb75cc 100644
--- a/src/core/ext/transport/chttp2/transport/bin_decoder.h
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.h
@@ -40,13 +40,12 @@
 
 /* base64 decode a slice with pad chars. Returns a new slice, does not take
    ownership of the input. Returns an empty slice if decoding is failed. */
-grpc_slice grpc_chttp2_base64_decode(grpc_exec_ctx* exec_ctx, grpc_slice input);
+grpc_slice grpc_chttp2_base64_decode(grpc_slice input);
 
 /* base64 decode a slice without pad chars, data length is needed. Returns a new
    slice, does not take ownership of the input. Returns an empty slice if
    decoding is failed. */
-grpc_slice grpc_chttp2_base64_decode_with_length(grpc_exec_ctx* exec_ctx,
-                                                 grpc_slice input,
+grpc_slice grpc_chttp2_base64_decode_with_length(grpc_slice input,
                                                  size_t output_length);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H */
diff --git a/src/core/ext/transport/chttp2/transport/bin_encoder.h b/src/core/ext/transport/chttp2/transport/bin_encoder.h
index a8f36a3..93ad0df 100644
--- a/src/core/ext/transport/chttp2/transport/bin_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/bin_encoder.h
@@ -32,7 +32,7 @@
 /* equivalent to:
    grpc_slice x = grpc_chttp2_base64_encode(input);
    grpc_slice y = grpc_chttp2_huffman_compress(x);
-   grpc_slice_unref_internal(exec_ctx, x);
+   grpc_slice_unref_internal( x);
    return y; */
 grpc_slice grpc_chttp2_base64_encode_and_huffman_compress(grpc_slice input);
 
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.cc b/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
index 5a7830b..4d81be1 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
@@ -95,105 +95,77 @@
                                                          "chttp2_refcount");
 
 /* forward declarations of various callbacks that we'll build closures around */
-static void write_action_begin_locked(grpc_exec_ctx* exec_ctx, void* t,
-                                      grpc_error* error);
-static void write_action(grpc_exec_ctx* exec_ctx, void* t, grpc_error* error);
-static void write_action_end_locked(grpc_exec_ctx* exec_ctx, void* t,
-                                    grpc_error* error);
+static void write_action_begin_locked(void* t, grpc_error* error);
+static void write_action(void* t, grpc_error* error);
+static void write_action_end_locked(void* t, grpc_error* error);
 
-static void read_action_locked(grpc_exec_ctx* exec_ctx, void* t,
-                               grpc_error* error);
+static void read_action_locked(void* t, grpc_error* error);
 
-static void complete_fetch_locked(grpc_exec_ctx* exec_ctx, void* gs,
-                                  grpc_error* error);
+static void complete_fetch_locked(void* gs, grpc_error* error);
 /** Set a transport level setting, and push it to our peer */
-static void queue_setting_update(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t,
+static void queue_setting_update(grpc_chttp2_transport* t,
                                  grpc_chttp2_setting_id id, uint32_t value);
 
-static void close_from_api(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                           grpc_chttp2_stream* s, grpc_error* error);
+static void close_from_api(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                           grpc_error* error);
 
 /** Start new streams that have been created if we can */
-static void maybe_start_some_streams(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t);
+static void maybe_start_some_streams(grpc_chttp2_transport* t);
 
-static void connectivity_state_set(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_transport* t,
+static void connectivity_state_set(grpc_chttp2_transport* t,
                                    grpc_connectivity_state state,
                                    grpc_error* error, const char* reason);
 
-static void incoming_byte_stream_destroy_locked(grpc_exec_ctx* exec_ctx,
-                                                void* byte_stream,
+static void incoming_byte_stream_destroy_locked(void* byte_stream,
                                                 grpc_error* error_ignored);
 static void incoming_byte_stream_publish_error(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error);
-static void incoming_byte_stream_unref(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_incoming_byte_stream* bs);
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error);
+static void incoming_byte_stream_unref(grpc_chttp2_incoming_byte_stream* bs);
 
-static void benign_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* t,
-                                    grpc_error* error);
-static void destructive_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* t,
-                                         grpc_error* error);
+static void benign_reclaimer_locked(void* t, grpc_error* error);
+static void destructive_reclaimer_locked(void* t, grpc_error* error);
 
-static void post_benign_reclaimer(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_transport* t);
-static void post_destructive_reclaimer(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_transport* t);
+static void post_benign_reclaimer(grpc_chttp2_transport* t);
+static void post_destructive_reclaimer(grpc_chttp2_transport* t);
 
-static void close_transport_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_transport* t, grpc_error* error);
-static void end_all_the_calls(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                              grpc_error* error);
+static void close_transport_locked(grpc_chttp2_transport* t, grpc_error* error);
+static void end_all_the_calls(grpc_chttp2_transport* t, grpc_error* error);
 
-static void schedule_bdp_ping_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t);
-static void start_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                  grpc_error* error);
-static void finish_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                   grpc_error* error);
-static void next_bdp_ping_timer_expired_locked(grpc_exec_ctx* exec_ctx,
-                                               void* tp, grpc_error* error);
+static void schedule_bdp_ping_locked(grpc_chttp2_transport* t);
+static void start_bdp_ping_locked(void* tp, grpc_error* error);
+static void finish_bdp_ping_locked(void* tp, grpc_error* error);
+static void next_bdp_ping_timer_expired_locked(void* tp, grpc_error* error);
 
-static void cancel_pings(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                         grpc_error* error);
-static void send_ping_locked(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void cancel_pings(grpc_chttp2_transport* t, grpc_error* error);
+static void send_ping_locked(grpc_chttp2_transport* t,
                              grpc_closure* on_initiate,
                              grpc_closure* on_complete);
-static void retry_initiate_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                       grpc_error* error);
+static void retry_initiate_ping_locked(void* tp, grpc_error* error);
 
 /** keepalive-relevant functions */
-static void init_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                       grpc_error* error);
-static void start_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error);
-static void finish_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error);
-static void keepalive_watchdog_fired_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                            grpc_error* error);
+static void init_keepalive_ping_locked(void* arg, grpc_error* error);
+static void start_keepalive_ping_locked(void* arg, grpc_error* error);
+static void finish_keepalive_ping_locked(void* arg, grpc_error* error);
+static void keepalive_watchdog_fired_locked(void* arg, grpc_error* error);
 
-static void reset_byte_stream(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error);
+static void reset_byte_stream(void* arg, grpc_error* error);
 
 /*******************************************************************************
  * CONSTRUCTION/DESTRUCTION/REFCOUNTING
  */
 
-static void destruct_transport(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_transport* t) {
+static void destruct_transport(grpc_chttp2_transport* t) {
   size_t i;
 
-  grpc_endpoint_destroy(exec_ctx, t->ep);
+  grpc_endpoint_destroy(t->ep);
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &t->qbuf);
+  grpc_slice_buffer_destroy_internal(&t->qbuf);
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &t->outbuf);
-  grpc_chttp2_hpack_compressor_destroy(exec_ctx, &t->hpack_compressor);
+  grpc_slice_buffer_destroy_internal(&t->outbuf);
+  grpc_chttp2_hpack_compressor_destroy(&t->hpack_compressor);
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &t->read_buffer);
-  grpc_chttp2_hpack_parser_destroy(exec_ctx, &t->hpack_parser);
+  grpc_slice_buffer_destroy_internal(&t->read_buffer);
+  grpc_chttp2_hpack_parser_destroy(&t->hpack_parser);
   grpc_chttp2_goaway_parser_destroy(&t->goaway_parser);
 
   for (i = 0; i < STREAM_LIST_COUNT; i++) {
@@ -206,12 +178,11 @@
   GPR_ASSERT(grpc_chttp2_stream_map_size(&t->stream_map) == 0);
 
   grpc_chttp2_stream_map_destroy(&t->stream_map);
-  grpc_connectivity_state_destroy(exec_ctx, &t->channel_callback.state_tracker);
+  grpc_connectivity_state_destroy(&t->channel_callback.state_tracker);
 
-  GRPC_COMBINER_UNREF(exec_ctx, t->combiner, "chttp2_transport");
+  GRPC_COMBINER_UNREF(t->combiner, "chttp2_transport");
 
-  cancel_pings(exec_ctx, t,
-               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport destroyed"));
+  cancel_pings(t, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport destroyed"));
 
   while (t->write_cb_pool) {
     grpc_chttp2_write_cb* next = t->write_cb_pool->next;
@@ -228,8 +199,7 @@
 }
 
 #ifndef NDEBUG
-void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t, const char* reason,
+void grpc_chttp2_unref_transport(grpc_chttp2_transport* t, const char* reason,
                                  const char* file, int line) {
   if (grpc_trace_chttp2_refcount.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&t->refs.count);
@@ -237,7 +207,7 @@
             t, val, val - 1, reason, file, line);
   }
   if (!gpr_unref(&t->refs)) return;
-  destruct_transport(exec_ctx, t);
+  destruct_transport(t);
 }
 
 void grpc_chttp2_ref_transport(grpc_chttp2_transport* t, const char* reason,
@@ -250,10 +220,9 @@
   gpr_ref(&t->refs);
 }
 #else
-void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t) {
+void grpc_chttp2_unref_transport(grpc_chttp2_transport* t) {
   if (!gpr_unref(&t->refs)) return;
-  destruct_transport(exec_ctx, t);
+  destruct_transport(t);
 }
 
 void grpc_chttp2_ref_transport(grpc_chttp2_transport* t) { gpr_ref(&t->refs); }
@@ -261,7 +230,7 @@
 
 static const grpc_transport_vtable* get_vtable(void);
 
-static void init_transport(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void init_transport(grpc_chttp2_transport* t,
                            const grpc_channel_args* channel_args,
                            grpc_endpoint* ep, bool is_client) {
   size_t i;
@@ -320,7 +289,7 @@
 
   t->goaway_error = GRPC_ERROR_NONE;
   grpc_chttp2_goaway_parser_init(&t->goaway_parser);
-  grpc_chttp2_hpack_parser_init(exec_ctx, &t->hpack_parser);
+  grpc_chttp2_hpack_parser_init(&t->hpack_parser);
 
   grpc_slice_buffer_init(&t->read_buffer);
 
@@ -351,14 +320,13 @@
 
   /* configure http2 the way we like it */
   if (is_client) {
-    queue_setting_update(exec_ctx, t, GRPC_CHTTP2_SETTINGS_ENABLE_PUSH, 0);
-    queue_setting_update(exec_ctx, t,
-                         GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 0);
+    queue_setting_update(t, GRPC_CHTTP2_SETTINGS_ENABLE_PUSH, 0);
+    queue_setting_update(t, GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 0);
   }
-  queue_setting_update(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE,
+  queue_setting_update(t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE,
                        DEFAULT_MAX_HEADER_LIST_SIZE);
-  queue_setting_update(exec_ctx, t,
-                       GRPC_CHTTP2_SETTINGS_GRPC_ALLOW_TRUE_BINARY_METADATA, 1);
+  queue_setting_update(t, GRPC_CHTTP2_SETTINGS_GRPC_ALLOW_TRUE_BINARY_METADATA,
+                       1);
 
   t->ping_policy.max_pings_without_data = g_default_max_pings_without_data;
   t->ping_policy.min_sent_ping_interval_without_data =
@@ -533,7 +501,7 @@
               int value = grpc_channel_arg_get_integer(
                   &channel_args->args[i], settings_map[j].integer_options);
               if (value >= 0) {
-                queue_setting_update(exec_ctx, t, settings_map[j].setting_id,
+                queue_setting_update(t, settings_map[j].setting_id,
                                      (uint32_t)value);
               }
             }
@@ -544,7 +512,7 @@
     }
   }
 
-  t->flow_control.Init(exec_ctx, t, enable_bdp);
+  t->flow_control.Init(t, enable_bdp);
 
   /* No pings allowed before receiving a header or data frame. */
   t->ping_state.pings_before_data_required = 0;
@@ -558,8 +526,8 @@
   if (t->keepalive_time != GRPC_MILLIS_INF_FUTURE) {
     t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_WAITING;
     GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
-    grpc_timer_init(exec_ctx, &t->keepalive_ping_timer,
-                    grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+    grpc_timer_init(&t->keepalive_ping_timer,
+                    grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                     &t->init_keepalive_ping_locked);
   } else {
     /* Use GRPC_CHTTP2_KEEPALIVE_STATE_DISABLED to indicate there are no
@@ -569,42 +537,37 @@
 
   if (enable_bdp) {
     GRPC_CHTTP2_REF_TRANSPORT(t, "bdp_ping");
-    schedule_bdp_ping_locked(exec_ctx, t);
+    schedule_bdp_ping_locked(t);
 
-    grpc_chttp2_act_on_flowctl_action(
-        exec_ctx, t->flow_control->PeriodicUpdate(exec_ctx), t, nullptr);
+    grpc_chttp2_act_on_flowctl_action(t->flow_control->PeriodicUpdate(), t,
+                                      nullptr);
   }
 
-  grpc_chttp2_initiate_write(exec_ctx, t,
-                             GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE);
-  post_benign_reclaimer(exec_ctx, t);
+  grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE);
+  post_benign_reclaimer(t);
 }
 
-static void destroy_transport_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                     grpc_error* error) {
+static void destroy_transport_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   t->destroying = 1;
   close_transport_locked(
-      exec_ctx, t,
-      grpc_error_set_int(
-          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport destroyed"),
-          GRPC_ERROR_INT_OCCURRED_DURING_WRITE, t->write_state));
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "destroy");
+      t, grpc_error_set_int(
+             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport destroyed"),
+             GRPC_ERROR_INT_OCCURRED_DURING_WRITE, t->write_state));
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "destroy");
 }
 
-static void destroy_transport(grpc_exec_ctx* exec_ctx, grpc_transport* gt) {
+static void destroy_transport(grpc_transport* gt) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_CREATE(destroy_transport_locked, t,
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(destroy_transport_locked, t,
                                          grpc_combiner_scheduler(t->combiner)),
                      GRPC_ERROR_NONE);
 }
 
-static void close_transport_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_transport* t,
+static void close_transport_locked(grpc_chttp2_transport* t,
                                    grpc_error* error) {
-  end_all_the_calls(exec_ctx, t, GRPC_ERROR_REF(error));
-  cancel_pings(exec_ctx, t, GRPC_ERROR_REF(error));
+  end_all_the_calls(t, GRPC_ERROR_REF(error));
+  cancel_pings(t, GRPC_ERROR_REF(error));
   if (t->closed_with_error == GRPC_ERROR_NONE) {
     if (!grpc_error_has_clear_grpc_status(error)) {
       error = grpc_error_set_int(error, GRPC_ERROR_INT_GRPC_STATUS,
@@ -622,21 +585,21 @@
     }
     GPR_ASSERT(error != GRPC_ERROR_NONE);
     t->closed_with_error = GRPC_ERROR_REF(error);
-    connectivity_state_set(exec_ctx, t, GRPC_CHANNEL_SHUTDOWN,
-                           GRPC_ERROR_REF(error), "close_transport");
+    connectivity_state_set(t, GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_REF(error),
+                           "close_transport");
     if (t->ping_state.is_delayed_ping_timer_set) {
-      grpc_timer_cancel(exec_ctx, &t->ping_state.delayed_ping_timer);
+      grpc_timer_cancel(&t->ping_state.delayed_ping_timer);
     }
     if (t->have_next_bdp_ping_timer) {
-      grpc_timer_cancel(exec_ctx, &t->next_bdp_ping_timer);
+      grpc_timer_cancel(&t->next_bdp_ping_timer);
     }
     switch (t->keepalive_state) {
       case GRPC_CHTTP2_KEEPALIVE_STATE_WAITING:
-        grpc_timer_cancel(exec_ctx, &t->keepalive_ping_timer);
+        grpc_timer_cancel(&t->keepalive_ping_timer);
         break;
       case GRPC_CHTTP2_KEEPALIVE_STATE_PINGING:
-        grpc_timer_cancel(exec_ctx, &t->keepalive_ping_timer);
-        grpc_timer_cancel(exec_ctx, &t->keepalive_watchdog_timer);
+        grpc_timer_cancel(&t->keepalive_ping_timer);
+        grpc_timer_cancel(&t->keepalive_watchdog_timer);
         break;
       case GRPC_CHTTP2_KEEPALIVE_STATE_DYING:
       case GRPC_CHTTP2_KEEPALIVE_STATE_DISABLED:
@@ -647,10 +610,14 @@
     /* flush writable stream list to avoid dangling references */
     grpc_chttp2_stream* s;
     while (grpc_chttp2_list_pop_writable_stream(t, &s)) {
-      GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:close");
+      GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:close");
     }
     GPR_ASSERT(t->write_state == GRPC_CHTTP2_WRITE_STATE_IDLE);
-    grpc_endpoint_shutdown(exec_ctx, t->ep, GRPC_ERROR_REF(error));
+    grpc_endpoint_shutdown(t->ep, GRPC_ERROR_REF(error));
+  }
+  if (t->notify_on_receive_settings != nullptr) {
+    GRPC_CLOSURE_SCHED(t->notify_on_receive_settings, GRPC_ERROR_CANCELLED);
+    t->notify_on_receive_settings = nullptr;
   }
   GRPC_ERROR_UNREF(error);
 }
@@ -659,22 +626,21 @@
 void grpc_chttp2_stream_ref(grpc_chttp2_stream* s, const char* reason) {
   grpc_stream_ref(s->refcount, reason);
 }
-void grpc_chttp2_stream_unref(grpc_exec_ctx* exec_ctx, grpc_chttp2_stream* s,
-                              const char* reason) {
-  grpc_stream_unref(exec_ctx, s->refcount, reason);
+void grpc_chttp2_stream_unref(grpc_chttp2_stream* s, const char* reason) {
+  grpc_stream_unref(s->refcount, reason);
 }
 #else
 void grpc_chttp2_stream_ref(grpc_chttp2_stream* s) {
   grpc_stream_ref(s->refcount);
 }
-void grpc_chttp2_stream_unref(grpc_exec_ctx* exec_ctx, grpc_chttp2_stream* s) {
-  grpc_stream_unref(exec_ctx, s->refcount);
+void grpc_chttp2_stream_unref(grpc_chttp2_stream* s) {
+  grpc_stream_unref(s->refcount);
 }
 #endif
 
-static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                       grpc_stream* gs, grpc_stream_refcount* refcount,
-                       const void* server_data, gpr_arena* arena) {
+static int init_stream(grpc_transport* gt, grpc_stream* gs,
+                       grpc_stream_refcount* refcount, const void* server_data,
+                       gpr_arena* arena) {
   GPR_TIMER_BEGIN("init_stream", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)gs;
@@ -708,7 +674,7 @@
     s->id = (uint32_t)(uintptr_t)server_data;
     *t->accepting_stream = s;
     grpc_chttp2_stream_map_add(&t->stream_map, s->id, s);
-    post_destructive_reclaimer(exec_ctx, t);
+    post_destructive_reclaimer(t);
   }
 
   s->flow_control.Init(t->flow_control.get(), s);
@@ -717,8 +683,7 @@
   return 0;
 }
 
-static void destroy_stream_locked(grpc_exec_ctx* exec_ctx, void* sp,
-                                  grpc_error* error) {
+static void destroy_stream_locked(void* sp, grpc_error* error) {
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)sp;
   grpc_chttp2_transport* t = s->t;
 
@@ -729,11 +694,10 @@
     GPR_ASSERT(grpc_chttp2_stream_map_find(&t->stream_map, s->id) == nullptr);
   }
 
-  grpc_slice_buffer_destroy_internal(exec_ctx,
-                                     &s->unprocessed_incoming_frames_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->frame_storage);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->compressed_data_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->decompressed_data_buffer);
+  grpc_slice_buffer_destroy_internal(&s->unprocessed_incoming_frames_buffer);
+  grpc_slice_buffer_destroy_internal(&s->frame_storage);
+  grpc_slice_buffer_destroy_internal(&s->compressed_data_buffer);
+  grpc_slice_buffer_destroy_internal(&s->decompressed_data_buffer);
 
   grpc_chttp2_list_remove_stalled_by_transport(t, s);
   grpc_chttp2_list_remove_stalled_by_stream(t, s);
@@ -752,27 +716,24 @@
   GPR_ASSERT(s->recv_initial_metadata_ready == nullptr);
   GPR_ASSERT(s->recv_message_ready == nullptr);
   GPR_ASSERT(s->recv_trailing_metadata_finished == nullptr);
-  grpc_chttp2_data_parser_destroy(exec_ctx, &s->data_parser);
-  grpc_chttp2_incoming_metadata_buffer_destroy(exec_ctx,
-                                               &s->metadata_buffer[0]);
-  grpc_chttp2_incoming_metadata_buffer_destroy(exec_ctx,
-                                               &s->metadata_buffer[1]);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->flow_controlled_buffer);
+  grpc_chttp2_data_parser_destroy(&s->data_parser);
+  grpc_chttp2_incoming_metadata_buffer_destroy(&s->metadata_buffer[0]);
+  grpc_chttp2_incoming_metadata_buffer_destroy(&s->metadata_buffer[1]);
+  grpc_slice_buffer_destroy_internal(&s->flow_controlled_buffer);
   GRPC_ERROR_UNREF(s->read_closed_error);
   GRPC_ERROR_UNREF(s->write_closed_error);
   GRPC_ERROR_UNREF(s->byte_stream_error);
 
   s->flow_control.Destroy();
 
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "stream");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "stream");
 
   GPR_TIMER_END("destroy_stream", 0);
 
-  GRPC_CLOSURE_SCHED(exec_ctx, s->destroy_stream_arg, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(s->destroy_stream_arg, GRPC_ERROR_NONE);
 }
 
-static void destroy_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                           grpc_stream* gs,
+static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
   GPR_TIMER_BEGIN("destroy_stream", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
@@ -789,7 +750,6 @@
 
   s->destroy_stream_arg = then_schedule_closure;
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&s->destroy_stream, destroy_stream_locked, s,
                         grpc_combiner_scheduler(t->combiner)),
       GRPC_ERROR_NONE);
@@ -801,8 +761,7 @@
   return (grpc_chttp2_stream*)grpc_chttp2_stream_map_find(&t->stream_map, id);
 }
 
-grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_exec_ctx* exec_ctx,
-                                                      grpc_chttp2_transport* t,
+grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_chttp2_transport* t,
                                                       uint32_t id) {
   if (t->channel_callback.accept_stream == nullptr) {
     return nullptr;
@@ -810,8 +769,7 @@
   grpc_chttp2_stream* accepting;
   GPR_ASSERT(t->accepting_stream == nullptr);
   t->accepting_stream = &accepting;
-  t->channel_callback.accept_stream(exec_ctx,
-                                    t->channel_callback.accept_stream_user_data,
+  t->channel_callback.accept_stream(t->channel_callback.accept_stream_user_data,
                                     &t->base, (void*)(uintptr_t)id);
   t->accepting_stream = nullptr;
   return accepting;
@@ -833,7 +791,7 @@
   GPR_UNREACHABLE_CODE(return "UNKNOWN");
 }
 
-static void set_write_state(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void set_write_state(grpc_chttp2_transport* t,
                             grpc_chttp2_write_state st, const char* reason) {
   GRPC_CHTTP2_IF_TRACING(gpr_log(GPR_DEBUG, "W:%p %s state %s -> %s [%s]", t,
                                  t->is_client ? "CLIENT" : "SERVER",
@@ -841,108 +799,100 @@
                                  write_state_name(st), reason));
   t->write_state = st;
   if (st == GRPC_CHTTP2_WRITE_STATE_IDLE) {
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &t->run_after_write);
+    GRPC_CLOSURE_LIST_SCHED(&t->run_after_write);
     if (t->close_transport_on_writes_finished != nullptr) {
       grpc_error* err = t->close_transport_on_writes_finished;
       t->close_transport_on_writes_finished = nullptr;
-      close_transport_locked(exec_ctx, t, err);
+      close_transport_locked(t, err);
     }
   }
 }
 
 static void inc_initiate_write_reason(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_initiate_write_reason reason) {
+    grpc_chttp2_initiate_write_reason reason) {
   switch (reason) {
     case GRPC_CHTTP2_INITIATE_WRITE_INITIAL_WRITE:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED(
-          exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE();
       break;
     case GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM:
-      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM(exec_ctx);
+      GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM();
       break;
   }
 }
 
-void grpc_chttp2_initiate_write(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_transport* t,
+void grpc_chttp2_initiate_write(grpc_chttp2_transport* t,
                                 grpc_chttp2_initiate_write_reason reason) {
   GPR_TIMER_BEGIN("grpc_chttp2_initiate_write", 0);
 
   switch (t->write_state) {
     case GRPC_CHTTP2_WRITE_STATE_IDLE:
-      inc_initiate_write_reason(exec_ctx, reason);
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_WRITING,
+      inc_initiate_write_reason(reason);
+      set_write_state(t, GRPC_CHTTP2_WRITE_STATE_WRITING,
                       grpc_chttp2_initiate_write_reason_string(reason));
       t->is_first_write_in_batch = true;
       GRPC_CHTTP2_REF_TRANSPORT(t, "writing");
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           GRPC_CLOSURE_INIT(&t->write_action_begin_locked,
                             write_action_begin_locked, t,
                             grpc_combiner_finally_scheduler(t->combiner)),
           GRPC_ERROR_NONE);
       break;
     case GRPC_CHTTP2_WRITE_STATE_WRITING:
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE,
+      set_write_state(t, GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE,
                       grpc_chttp2_initiate_write_reason_string(reason));
       break;
     case GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE:
@@ -951,8 +901,7 @@
   GPR_TIMER_END("grpc_chttp2_initiate_write", 0);
 }
 
-void grpc_chttp2_mark_stream_writable(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_transport* t,
+void grpc_chttp2_mark_stream_writable(grpc_chttp2_transport* t,
                                       grpc_chttp2_stream* s) {
   if (t->closed_with_error == GRPC_ERROR_NONE &&
       grpc_chttp2_list_add_writable_stream(t, s)) {
@@ -1002,8 +951,7 @@
   GPR_UNREACHABLE_CODE(return "bad state tuple");
 }
 
-static void write_action_begin_locked(grpc_exec_ctx* exec_ctx, void* gt,
-                                      grpc_error* error_ignored) {
+static void write_action_begin_locked(void* gt, grpc_error* error_ignored) {
   GPR_TIMER_BEGIN("write_action_begin_locked", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
   GPR_ASSERT(t->write_state != GRPC_CHTTP2_WRITE_STATE_IDLE);
@@ -1011,62 +959,59 @@
   if (t->closed_with_error != GRPC_ERROR_NONE) {
     r.writing = false;
   } else {
-    r = grpc_chttp2_begin_write(exec_ctx, t);
+    r = grpc_chttp2_begin_write(t);
   }
   if (r.writing) {
     if (r.partial) {
-      GRPC_STATS_INC_HTTP2_PARTIAL_WRITES(exec_ctx);
+      GRPC_STATS_INC_HTTP2_PARTIAL_WRITES();
     }
     if (!t->is_first_write_in_batch) {
-      GRPC_STATS_INC_HTTP2_WRITES_CONTINUED(exec_ctx);
+      GRPC_STATS_INC_HTTP2_WRITES_CONTINUED();
     }
     grpc_closure_scheduler* scheduler =
         write_scheduler(t, r.early_results_scheduled, r.partial);
     if (scheduler != grpc_schedule_on_exec_ctx) {
-      GRPC_STATS_INC_HTTP2_WRITES_OFFLOADED(exec_ctx);
+      GRPC_STATS_INC_HTTP2_WRITES_OFFLOADED();
     }
     set_write_state(
-        exec_ctx, t,
+        t,
         r.partial ? GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE
                   : GRPC_CHTTP2_WRITE_STATE_WRITING,
         begin_writing_desc(r.partial, scheduler == grpc_schedule_on_exec_ctx));
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_INIT(&t->write_action, write_action, t, scheduler),
         GRPC_ERROR_NONE);
   } else {
-    GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN(exec_ctx);
-    set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_IDLE,
-                    "begin writing nothing");
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "writing");
+    GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN();
+    set_write_state(t, GRPC_CHTTP2_WRITE_STATE_IDLE, "begin writing nothing");
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "writing");
   }
   GPR_TIMER_END("write_action_begin_locked", 0);
 }
 
-static void write_action(grpc_exec_ctx* exec_ctx, void* gt, grpc_error* error) {
+static void write_action(void* gt, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
   GPR_TIMER_BEGIN("write_action", 0);
   grpc_endpoint_write(
-      exec_ctx, t->ep, &t->outbuf,
+      t->ep, &t->outbuf,
       GRPC_CLOSURE_INIT(&t->write_action_end_locked, write_action_end_locked, t,
                         grpc_combiner_scheduler(t->combiner)));
   GPR_TIMER_END("write_action", 0);
 }
 
-static void write_action_end_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                    grpc_error* error) {
+static void write_action_end_locked(void* tp, grpc_error* error) {
   GPR_TIMER_BEGIN("terminate_writing_with_lock", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
 
   if (error != GRPC_ERROR_NONE) {
-    close_transport_locked(exec_ctx, t, GRPC_ERROR_REF(error));
+    close_transport_locked(t, GRPC_ERROR_REF(error));
   }
 
   if (t->sent_goaway_state == GRPC_CHTTP2_GOAWAY_SEND_SCHEDULED) {
     t->sent_goaway_state = GRPC_CHTTP2_GOAWAY_SENT;
     if (grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
       close_transport_locked(
-          exec_ctx, t, GRPC_ERROR_CREATE_FROM_STATIC_STRING("goaway sent"));
+          t, GRPC_ERROR_CREATE_FROM_STATIC_STRING("goaway sent"));
     }
   }
 
@@ -1075,17 +1020,14 @@
       GPR_UNREACHABLE_CODE(break);
     case GRPC_CHTTP2_WRITE_STATE_WRITING:
       GPR_TIMER_MARK("state=writing", 0);
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_IDLE,
-                      "finish writing");
+      set_write_state(t, GRPC_CHTTP2_WRITE_STATE_IDLE, "finish writing");
       break;
     case GRPC_CHTTP2_WRITE_STATE_WRITING_WITH_MORE:
       GPR_TIMER_MARK("state=writing_stale_no_poller", 0);
-      set_write_state(exec_ctx, t, GRPC_CHTTP2_WRITE_STATE_WRITING,
-                      "continue writing");
+      set_write_state(t, GRPC_CHTTP2_WRITE_STATE_WRITING, "continue writing");
       t->is_first_write_in_batch = false;
       GRPC_CHTTP2_REF_TRANSPORT(t, "writing");
       GRPC_CLOSURE_RUN(
-          exec_ctx,
           GRPC_CLOSURE_INIT(&t->write_action_begin_locked,
                             write_action_begin_locked, t,
                             grpc_combiner_finally_scheduler(t->combiner)),
@@ -1093,16 +1035,15 @@
       break;
   }
 
-  grpc_chttp2_end_write(exec_ctx, t, GRPC_ERROR_REF(error));
+  grpc_chttp2_end_write(t, GRPC_ERROR_REF(error));
 
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "writing");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "writing");
   GPR_TIMER_END("terminate_writing_with_lock", 0);
 }
 
 // Dirties an HTTP2 setting to be sent out next time a writing path occurs.
 // If the change needs to occur immediately, manually initiate a write.
-static void queue_setting_update(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t,
+static void queue_setting_update(grpc_chttp2_transport* t,
                                  grpc_chttp2_setting_id id, uint32_t value) {
   const grpc_chttp2_setting_parameters* sp =
       &grpc_chttp2_settings_parameters[id];
@@ -1117,8 +1058,7 @@
   }
 }
 
-void grpc_chttp2_add_incoming_goaway(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+void grpc_chttp2_add_incoming_goaway(grpc_chttp2_transport* t,
                                      uint32_t goaway_error,
                                      grpc_slice goaway_text) {
   // GRPC_CHTTP2_IF_TRACING(
@@ -1153,12 +1093,11 @@
 
   /* lie: use transient failure from the transport to indicate goaway has been
    * received */
-  connectivity_state_set(exec_ctx, t, GRPC_CHANNEL_TRANSIENT_FAILURE,
+  connectivity_state_set(t, GRPC_CHANNEL_TRANSIENT_FAILURE,
                          GRPC_ERROR_REF(t->goaway_error), "got_goaway");
 }
 
-static void maybe_start_some_streams(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t) {
+static void maybe_start_some_streams(grpc_chttp2_transport* t) {
   grpc_chttp2_stream* s;
   /* start streams where we have free grpc_chttp2_stream ids and free
    * concurrency */
@@ -1178,22 +1117,21 @@
 
     if (t->next_stream_id >= MAX_CLIENT_STREAM_ID) {
       connectivity_state_set(
-          exec_ctx, t, GRPC_CHANNEL_TRANSIENT_FAILURE,
+          t, GRPC_CHANNEL_TRANSIENT_FAILURE,
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Stream IDs exhausted"),
           "no_more_stream_ids");
     }
 
     grpc_chttp2_stream_map_add(&t->stream_map, s->id, s);
-    post_destructive_reclaimer(exec_ctx, t);
-    grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM);
+    post_destructive_reclaimer(t);
+    grpc_chttp2_mark_stream_writable(t, s);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_START_NEW_STREAM);
   }
   /* cancel out streams that will never be started */
   while (t->next_stream_id >= MAX_CLIENT_STREAM_ID &&
          grpc_chttp2_list_pop_waiting_for_concurrency(t, &s)) {
     grpc_chttp2_cancel_stream(
-        exec_ctx, t, s,
+        t, s,
         grpc_error_set_int(
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Stream IDs exhausted"),
             GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
@@ -1215,15 +1153,13 @@
   return closure;
 }
 
-static void null_then_run_closure(grpc_exec_ctx* exec_ctx,
-                                  grpc_closure** closure, grpc_error* error) {
+static void null_then_run_closure(grpc_closure** closure, grpc_error* error) {
   grpc_closure* c = *closure;
   *closure = nullptr;
-  GRPC_CLOSURE_RUN(exec_ctx, c, error);
+  GRPC_CLOSURE_RUN(c, error);
 }
 
-void grpc_chttp2_complete_closure_step(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_transport* t,
+void grpc_chttp2_complete_closure_step(grpc_chttp2_transport* t,
                                        grpc_chttp2_stream* s,
                                        grpc_closure** pclosure,
                                        grpc_error* error, const char* desc) {
@@ -1263,7 +1199,7 @@
     }
     if ((t->write_state == GRPC_CHTTP2_WRITE_STATE_IDLE) ||
         !(closure->next_data.scratch & CLOSURE_BARRIER_MAY_COVER_WRITE)) {
-      GRPC_CLOSURE_RUN(exec_ctx, closure, closure->error_data.error);
+      GRPC_CLOSURE_RUN(closure, closure->error_data.error);
     } else {
       grpc_closure_list_append(&t->run_after_write, closure,
                                closure->error_data.error);
@@ -1279,28 +1215,24 @@
   return false;
 }
 
-static void maybe_become_writable_due_to_send_msg(grpc_exec_ctx* exec_ctx,
-                                                  grpc_chttp2_transport* t,
+static void maybe_become_writable_due_to_send_msg(grpc_chttp2_transport* t,
                                                   grpc_chttp2_stream* s) {
   if (s->id != 0 && (!s->write_buffering ||
                      s->flow_controlled_buffer.length > t->write_buffer_size)) {
-    grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE);
+    grpc_chttp2_mark_stream_writable(t, s);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_SEND_MESSAGE);
   }
 }
 
-static void add_fetched_slice_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+static void add_fetched_slice_locked(grpc_chttp2_transport* t,
                                      grpc_chttp2_stream* s) {
   s->fetched_send_message_length +=
       (uint32_t)GRPC_SLICE_LENGTH(s->fetching_slice);
   grpc_slice_buffer_add(&s->flow_controlled_buffer, s->fetching_slice);
-  maybe_become_writable_due_to_send_msg(exec_ctx, t, s);
+  maybe_become_writable_due_to_send_msg(t, s);
 }
 
-static void continue_fetching_send_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t,
+static void continue_fetching_send_locked(grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s) {
   for (;;) {
     if (s->fetching_send_message == nullptr) {
@@ -1309,11 +1241,11 @@
       return;  /* early out */
     }
     if (s->fetched_send_message_length == s->fetching_send_message->length) {
-      grpc_byte_stream_destroy(exec_ctx, s->fetching_send_message);
+      grpc_byte_stream_destroy(s->fetching_send_message);
       int64_t notify_offset = s->next_message_end_offset;
       if (notify_offset <= s->flow_controlled_bytes_written) {
         grpc_chttp2_complete_closure_step(
-            exec_ctx, t, s, &s->fetching_send_message_finished, GRPC_ERROR_NONE,
+            t, s, &s->fetching_send_message_finished, GRPC_ERROR_NONE,
             "fetching_send_message_finished");
       } else {
         grpc_chttp2_write_cb* cb = t->write_cb_pool;
@@ -1334,39 +1266,37 @@
       }
       s->fetching_send_message = nullptr;
       return; /* early out */
-    } else if (grpc_byte_stream_next(exec_ctx, s->fetching_send_message,
-                                     UINT32_MAX, &s->complete_fetch_locked)) {
-      grpc_error* error = grpc_byte_stream_pull(
-          exec_ctx, s->fetching_send_message, &s->fetching_slice);
+    } else if (grpc_byte_stream_next(s->fetching_send_message, UINT32_MAX,
+                                     &s->complete_fetch_locked)) {
+      grpc_error* error =
+          grpc_byte_stream_pull(s->fetching_send_message, &s->fetching_slice);
       if (error != GRPC_ERROR_NONE) {
-        grpc_byte_stream_destroy(exec_ctx, s->fetching_send_message);
-        grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
+        grpc_byte_stream_destroy(s->fetching_send_message);
+        grpc_chttp2_cancel_stream(t, s, error);
       } else {
-        add_fetched_slice_locked(exec_ctx, t, s);
+        add_fetched_slice_locked(t, s);
       }
     }
   }
 }
 
-static void complete_fetch_locked(grpc_exec_ctx* exec_ctx, void* gs,
-                                  grpc_error* error) {
+static void complete_fetch_locked(void* gs, grpc_error* error) {
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)gs;
   grpc_chttp2_transport* t = s->t;
   if (error == GRPC_ERROR_NONE) {
-    error = grpc_byte_stream_pull(exec_ctx, s->fetching_send_message,
-                                  &s->fetching_slice);
+    error = grpc_byte_stream_pull(s->fetching_send_message, &s->fetching_slice);
     if (error == GRPC_ERROR_NONE) {
-      add_fetched_slice_locked(exec_ctx, t, s);
-      continue_fetching_send_locked(exec_ctx, t, s);
+      add_fetched_slice_locked(t, s);
+      continue_fetching_send_locked(t, s);
     }
   }
   if (error != GRPC_ERROR_NONE) {
-    grpc_byte_stream_destroy(exec_ctx, s->fetching_send_message);
-    grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
+    grpc_byte_stream_destroy(s->fetching_send_message);
+    grpc_chttp2_cancel_stream(t, s, error);
   }
 }
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
 static void log_metadata(const grpc_metadata_batch* md_batch, uint32_t id,
                          bool is_client, bool is_initial) {
@@ -1381,7 +1311,7 @@
   }
 }
 
-static void perform_stream_op_locked(grpc_exec_ctx* exec_ctx, void* stream_op,
+static void perform_stream_op_locked(void* stream_op,
                                      grpc_error* error_ignored) {
   GPR_TIMER_BEGIN("perform_stream_op_locked", 0);
 
@@ -1391,7 +1321,7 @@
   grpc_transport_stream_op_batch_payload* op_payload = op->payload;
   grpc_chttp2_transport* t = s->t;
 
-  GRPC_STATS_INC_HTTP2_OP_BATCHES(exec_ctx);
+  GRPC_STATS_INC_HTTP2_OP_BATCHES();
 
   if (grpc_http_trace.enabled()) {
     char* str = grpc_transport_stream_op_batch_string(op);
@@ -1426,13 +1356,12 @@
   }
 
   if (op->cancel_stream) {
-    GRPC_STATS_INC_HTTP2_OP_CANCEL(exec_ctx);
-    grpc_chttp2_cancel_stream(exec_ctx, t, s,
-                              op_payload->cancel_stream.cancel_error);
+    GRPC_STATS_INC_HTTP2_OP_CANCEL();
+    grpc_chttp2_cancel_stream(t, s, op_payload->cancel_stream.cancel_error);
   }
 
   if (op->send_initial_metadata) {
-    GRPC_STATS_INC_HTTP2_OP_SEND_INITIAL_METADATA(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_SEND_INITIAL_METADATA();
     GPR_ASSERT(s->send_initial_metadata_finished == nullptr);
     on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
 
@@ -1460,7 +1389,7 @@
     }
     if (metadata_size > metadata_peer_limit) {
       grpc_chttp2_cancel_stream(
-          exec_ctx, t, s,
+          t, s,
           grpc_error_set_int(
               grpc_error_set_int(
                   grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
@@ -1479,10 +1408,10 @@
           if (t->closed_with_error == GRPC_ERROR_NONE) {
             GPR_ASSERT(s->id == 0);
             grpc_chttp2_list_add_waiting_for_concurrency(t, s);
-            maybe_start_some_streams(exec_ctx, t);
+            maybe_start_some_streams(t);
           } else {
             grpc_chttp2_cancel_stream(
-                exec_ctx, t, s,
+                t, s,
                 grpc_error_set_int(
                     GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                         "Transport closed", &t->closed_with_error, 1),
@@ -1490,18 +1419,18 @@
           }
         } else {
           GPR_ASSERT(s->id != 0);
-          grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+          grpc_chttp2_mark_stream_writable(t, s);
           if (!(op->send_message &&
                 (op->payload->send_message.send_message->flags &
                  GRPC_WRITE_BUFFER_HINT))) {
             grpc_chttp2_initiate_write(
-                exec_ctx, t, GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA);
+                t, GRPC_CHTTP2_INITIATE_WRITE_SEND_INITIAL_METADATA);
           }
         }
       } else {
         s->send_initial_metadata = nullptr;
         grpc_chttp2_complete_closure_step(
-            exec_ctx, t, s, &s->send_initial_metadata_finished,
+            t, s, &s->send_initial_metadata_finished,
             GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                 "Attempt to send initial metadata after stream was closed",
                 &s->write_closed_error, 1),
@@ -1515,9 +1444,9 @@
   }
 
   if (op->send_message) {
-    GRPC_STATS_INC_HTTP2_OP_SEND_MESSAGE(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_SEND_MESSAGE();
     GRPC_STATS_INC_HTTP2_SEND_MESSAGE_SIZE(
-        exec_ctx, op->payload->send_message.send_message->length);
+        op->payload->send_message.send_message->length);
     on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
     s->fetching_send_message_finished = add_closure_barrier(op->on_complete);
     if (s->write_closed) {
@@ -1527,7 +1456,7 @@
       // recv_message failure, breaking out of its loop, and then
       // starting recv_trailing_metadata.
       grpc_chttp2_complete_closure_step(
-          exec_ctx, t, s, &s->fetching_send_message_finished,
+          t, s, &s->fetching_send_message_finished,
           t->is_client && s->received_trailing_metadata
               ? GRPC_ERROR_NONE
               : GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
@@ -1556,13 +1485,13 @@
       } else {
         s->write_buffering = false;
       }
-      continue_fetching_send_locked(exec_ctx, t, s);
-      maybe_become_writable_due_to_send_msg(exec_ctx, t, s);
+      continue_fetching_send_locked(t, s);
+      maybe_become_writable_due_to_send_msg(t, s);
     }
   }
 
   if (op->send_trailing_metadata) {
-    GRPC_STATS_INC_HTTP2_OP_SEND_TRAILING_METADATA(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_SEND_TRAILING_METADATA();
     GPR_ASSERT(s->send_trailing_metadata_finished == nullptr);
     on_complete->next_data.scratch |= CLOSURE_BARRIER_MAY_COVER_WRITE;
     s->send_trailing_metadata_finished = add_closure_barrier(on_complete);
@@ -1576,7 +1505,7 @@
                    [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE];
     if (metadata_size > metadata_peer_limit) {
       grpc_chttp2_cancel_stream(
-          exec_ctx, t, s,
+          t, s,
           grpc_error_set_int(
               grpc_error_set_int(
                   grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
@@ -1593,7 +1522,7 @@
       if (s->write_closed) {
         s->send_trailing_metadata = nullptr;
         grpc_chttp2_complete_closure_step(
-            exec_ctx, t, s, &s->send_trailing_metadata_finished,
+            t, s, &s->send_trailing_metadata_finished,
             grpc_metadata_batch_is_empty(
                 op->payload->send_trailing_metadata.send_trailing_metadata)
                 ? GRPC_ERROR_NONE
@@ -1604,15 +1533,15 @@
       } else if (s->id != 0) {
         /* TODO(ctiller): check if there's flow control for any outstanding
            bytes before going writable */
-        grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+        grpc_chttp2_mark_stream_writable(t, s);
         grpc_chttp2_initiate_write(
-            exec_ctx, t, GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA);
+            t, GRPC_CHTTP2_INITIATE_WRITE_SEND_TRAILING_METADATA);
       }
     }
   }
 
   if (op->recv_initial_metadata) {
-    GRPC_STATS_INC_HTTP2_OP_RECV_INITIAL_METADATA(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_RECV_INITIAL_METADATA();
     GPR_ASSERT(s->recv_initial_metadata_ready == nullptr);
     s->recv_initial_metadata_ready =
         op_payload->recv_initial_metadata.recv_initial_metadata_ready;
@@ -1624,11 +1553,11 @@
       gpr_atm_rel_store(op_payload->recv_initial_metadata.peer_string,
                         (gpr_atm)gpr_strdup(t->peer_string));
     }
-    grpc_chttp2_maybe_complete_recv_initial_metadata(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_initial_metadata(t, s);
   }
 
   if (op->recv_message) {
-    GRPC_STATS_INC_HTTP2_OP_RECV_MESSAGE(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_RECV_MESSAGE();
     size_t already_received;
     GPR_ASSERT(s->recv_message_ready == nullptr);
     GPR_ASSERT(!s->pending_byte_stream);
@@ -1639,32 +1568,30 @@
         already_received = s->frame_storage.length;
         s->flow_control->IncomingByteStreamUpdate(GRPC_HEADER_SIZE_IN_BYTES,
                                                   already_received);
-        grpc_chttp2_act_on_flowctl_action(exec_ctx,
-                                          s->flow_control->MakeAction(), t, s);
+        grpc_chttp2_act_on_flowctl_action(s->flow_control->MakeAction(), t, s);
       }
     }
-    grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_message(t, s);
   }
 
   if (op->recv_trailing_metadata) {
-    GRPC_STATS_INC_HTTP2_OP_RECV_TRAILING_METADATA(exec_ctx);
+    GRPC_STATS_INC_HTTP2_OP_RECV_TRAILING_METADATA();
     GPR_ASSERT(s->recv_trailing_metadata_finished == nullptr);
     s->recv_trailing_metadata_finished = add_closure_barrier(on_complete);
     s->recv_trailing_metadata =
         op_payload->recv_trailing_metadata.recv_trailing_metadata;
     s->final_metadata_requested = true;
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
   }
 
-  grpc_chttp2_complete_closure_step(exec_ctx, t, s, &on_complete,
-                                    GRPC_ERROR_NONE, "op->on_complete");
+  grpc_chttp2_complete_closure_step(t, s, &on_complete, GRPC_ERROR_NONE,
+                                    "op->on_complete");
 
   GPR_TIMER_END("perform_stream_op_locked", 0);
-  GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "perform_stream_op");
+  GRPC_CHTTP2_STREAM_UNREF(s, "perform_stream_op");
 }
 
-static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                              grpc_stream* gs,
+static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
                               grpc_transport_stream_op_batch* op) {
   GPR_TIMER_BEGIN("perform_stream_op", 0);
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
@@ -1692,32 +1619,29 @@
   op->handler_private.extra_arg = gs;
   GRPC_CHTTP2_STREAM_REF(s, "perform_stream_op");
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&op->handler_private.closure, perform_stream_op_locked,
                         op, grpc_combiner_scheduler(t->combiner)),
       GRPC_ERROR_NONE);
   GPR_TIMER_END("perform_stream_op", 0);
 }
 
-static void cancel_pings(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                         grpc_error* error) {
+static void cancel_pings(grpc_chttp2_transport* t, grpc_error* error) {
   /* callback remaining pings: they're not allowed to call into the transpot,
      and maybe they hold resources that need to be freed */
   grpc_chttp2_ping_queue* pq = &t->ping_queue;
   GPR_ASSERT(error != GRPC_ERROR_NONE);
   for (size_t j = 0; j < GRPC_CHTTP2_PCL_COUNT; j++) {
     grpc_closure_list_fail_all(&pq->lists[j], GRPC_ERROR_REF(error));
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pq->lists[j]);
+    GRPC_CLOSURE_LIST_SCHED(&pq->lists[j]);
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void send_ping_locked(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void send_ping_locked(grpc_chttp2_transport* t,
                              grpc_closure* on_initiate, grpc_closure* on_ack) {
   if (t->closed_with_error != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, on_initiate,
-                       GRPC_ERROR_REF(t->closed_with_error));
-    GRPC_CLOSURE_SCHED(exec_ctx, on_ack, GRPC_ERROR_REF(t->closed_with_error));
+    GRPC_CLOSURE_SCHED(on_initiate, GRPC_ERROR_REF(t->closed_with_error));
+    GRPC_CLOSURE_SCHED(on_ack, GRPC_ERROR_REF(t->closed_with_error));
     return;
   }
   grpc_chttp2_ping_queue* pq = &t->ping_queue;
@@ -1727,18 +1651,15 @@
                            GRPC_ERROR_NONE);
 }
 
-static void retry_initiate_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                       grpc_error* error) {
+static void retry_initiate_ping_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   t->ping_state.is_delayed_ping_timer_set = false;
   if (error == GRPC_ERROR_NONE) {
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING);
   }
 }
 
-void grpc_chttp2_ack_ping(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                          uint64_t id) {
+void grpc_chttp2_ack_ping(grpc_chttp2_transport* t, uint64_t id) {
   grpc_chttp2_ping_queue* pq = &t->ping_queue;
   if (pq->inflight_id != id) {
     char* from = grpc_endpoint_get_peer(t->ep);
@@ -1746,55 +1667,48 @@
     gpr_free(from);
     return;
   }
-  GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pq->lists[GRPC_CHTTP2_PCL_INFLIGHT]);
+  GRPC_CLOSURE_LIST_SCHED(&pq->lists[GRPC_CHTTP2_PCL_INFLIGHT]);
   if (!grpc_closure_list_empty(pq->lists[GRPC_CHTTP2_PCL_NEXT])) {
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_CONTINUE_PINGS);
   }
 }
 
-static void send_goaway(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                        grpc_error* error) {
+static void send_goaway(grpc_chttp2_transport* t, grpc_error* error) {
   t->sent_goaway_state = GRPC_CHTTP2_GOAWAY_SEND_SCHEDULED;
   grpc_http2_error_code http_error;
   grpc_slice slice;
-  grpc_error_get_status(exec_ctx, error, GRPC_MILLIS_INF_FUTURE, nullptr,
-                        &slice, &http_error, nullptr);
+  grpc_error_get_status(error, GRPC_MILLIS_INF_FUTURE, nullptr, &slice,
+                        &http_error, nullptr);
   grpc_chttp2_goaway_append(t->last_new_stream_id, (uint32_t)http_error,
                             grpc_slice_ref_internal(slice), &t->qbuf);
-  grpc_chttp2_initiate_write(exec_ctx, t,
-                             GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT);
+  grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT);
   GRPC_ERROR_UNREF(error);
 }
 
-void grpc_chttp2_add_ping_strike(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t) {
+void grpc_chttp2_add_ping_strike(grpc_chttp2_transport* t) {
   t->ping_recv_state.ping_strikes++;
   if (++t->ping_recv_state.ping_strikes > t->ping_policy.max_ping_strikes &&
       t->ping_policy.max_ping_strikes != 0) {
-    send_goaway(exec_ctx, t,
+    send_goaway(t,
                 grpc_error_set_int(
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("too_many_pings"),
                     GRPC_ERROR_INT_HTTP2_ERROR, GRPC_HTTP2_ENHANCE_YOUR_CALM));
     /*The transport will be closed after the write is done */
     close_transport_locked(
-        exec_ctx, t,
-        grpc_error_set_int(
-            GRPC_ERROR_CREATE_FROM_STATIC_STRING("Too many pings"),
-            GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
+        t, grpc_error_set_int(
+               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Too many pings"),
+               GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
   }
 }
 
-static void perform_transport_op_locked(grpc_exec_ctx* exec_ctx,
-                                        void* stream_op,
+static void perform_transport_op_locked(void* stream_op,
                                         grpc_error* error_ignored) {
   grpc_transport_op* op = (grpc_transport_op*)stream_op;
   grpc_chttp2_transport* t =
       (grpc_chttp2_transport*)op->handler_private.extra_arg;
-  grpc_error* close_transport = op->disconnect_with_error;
 
   if (op->goaway_error) {
-    send_goaway(exec_ctx, t, op->goaway_error);
+    send_goaway(t, op->goaway_error);
   }
 
   if (op->set_accept_stream) {
@@ -1804,43 +1718,40 @@
   }
 
   if (op->bind_pollset) {
-    grpc_endpoint_add_to_pollset(exec_ctx, t->ep, op->bind_pollset);
+    grpc_endpoint_add_to_pollset(t->ep, op->bind_pollset);
   }
 
   if (op->bind_pollset_set) {
-    grpc_endpoint_add_to_pollset_set(exec_ctx, t->ep, op->bind_pollset_set);
+    grpc_endpoint_add_to_pollset_set(t->ep, op->bind_pollset_set);
   }
 
-  if (op->send_ping) {
-    send_ping_locked(exec_ctx, t, nullptr, op->send_ping);
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING);
+  if (op->send_ping.on_initiate != nullptr || op->send_ping.on_ack != nullptr) {
+    send_ping_locked(t, op->send_ping.on_initiate, op->send_ping.on_ack);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_APPLICATION_PING);
   }
 
   if (op->on_connectivity_state_change != nullptr) {
     grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &t->channel_callback.state_tracker, op->connectivity_state,
+        &t->channel_callback.state_tracker, op->connectivity_state,
         op->on_connectivity_state_change);
   }
 
-  if (close_transport != GRPC_ERROR_NONE) {
-    close_transport_locked(exec_ctx, t, close_transport);
+  if (op->disconnect_with_error != GRPC_ERROR_NONE) {
+    close_transport_locked(t, op->disconnect_with_error);
   }
 
-  GRPC_CLOSURE_RUN(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_RUN(op->on_consumed, GRPC_ERROR_NONE);
 
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "transport_op");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "transport_op");
 }
 
-static void perform_transport_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                                 grpc_transport_op* op) {
+static void perform_transport_op(grpc_transport* gt, grpc_transport_op* op) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
   char* msg = grpc_transport_op_string(op);
   gpr_free(msg);
   op->handler_private.extra_arg = gt;
   GRPC_CHTTP2_REF_TRANSPORT(t, "transport_op");
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_INIT(&op->handler_private.closure,
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_INIT(&op->handler_private.closure,
                                        perform_transport_op_locked, op,
                                        grpc_combiner_scheduler(t->combiner)),
                      GRPC_ERROR_NONE);
@@ -1850,36 +1761,33 @@
  * INPUT PROCESSING - GENERAL
  */
 
-void grpc_chttp2_maybe_complete_recv_initial_metadata(grpc_exec_ctx* exec_ctx,
-                                                      grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_initial_metadata(grpc_chttp2_transport* t,
                                                       grpc_chttp2_stream* s) {
   if (s->recv_initial_metadata_ready != nullptr &&
       s->published_metadata[0] != GRPC_METADATA_NOT_PUBLISHED) {
     if (s->seen_error) {
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &s->frame_storage);
+      grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
       if (!s->pending_byte_stream) {
         grpc_slice_buffer_reset_and_unref_internal(
-            exec_ctx, &s->unprocessed_incoming_frames_buffer);
+            &s->unprocessed_incoming_frames_buffer);
       }
     }
-    grpc_chttp2_incoming_metadata_buffer_publish(
-        exec_ctx, &s->metadata_buffer[0], s->recv_initial_metadata);
-    null_then_run_closure(exec_ctx, &s->recv_initial_metadata_ready,
-                          GRPC_ERROR_NONE);
+    grpc_chttp2_incoming_metadata_buffer_publish(&s->metadata_buffer[0],
+                                                 s->recv_initial_metadata);
+    null_then_run_closure(&s->recv_initial_metadata_ready, GRPC_ERROR_NONE);
   }
 }
 
-void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx* exec_ctx,
-                                             grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_message(grpc_chttp2_transport* t,
                                              grpc_chttp2_stream* s) {
   grpc_error* error = GRPC_ERROR_NONE;
   if (s->recv_message_ready != nullptr) {
     *s->recv_message = nullptr;
     if (s->final_metadata_requested && s->seen_error) {
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &s->frame_storage);
+      grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
       if (!s->pending_byte_stream) {
         grpc_slice_buffer_reset_and_unref_internal(
-            exec_ctx, &s->unprocessed_incoming_frames_buffer);
+            &s->unprocessed_incoming_frames_buffer);
       }
     }
     if (!s->pending_byte_stream) {
@@ -1906,10 +1814,9 @@
                   &s->decompressed_data_buffer, nullptr,
                   GRPC_HEADER_SIZE_IN_BYTES - s->decompressed_header_bytes,
                   &end_of_context)) {
-            grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                       &s->frame_storage);
+            grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
             grpc_slice_buffer_reset_and_unref_internal(
-                exec_ctx, &s->unprocessed_incoming_frames_buffer);
+                &s->unprocessed_incoming_frames_buffer);
             error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                 "Stream decompression error.");
           } else {
@@ -1918,8 +1825,8 @@
               s->decompressed_header_bytes = 0;
             }
             error = grpc_deframe_unprocessed_incoming_frames(
-                exec_ctx, &s->data_parser, s, &s->decompressed_data_buffer,
-                nullptr, s->recv_message);
+                &s->data_parser, s, &s->decompressed_data_buffer, nullptr,
+                s->recv_message);
             if (end_of_context) {
               grpc_stream_compression_context_destroy(
                   s->stream_decompression_ctx);
@@ -1928,15 +1835,14 @@
           }
         } else {
           error = grpc_deframe_unprocessed_incoming_frames(
-              exec_ctx, &s->data_parser, s,
-              &s->unprocessed_incoming_frames_buffer, nullptr, s->recv_message);
+              &s->data_parser, s, &s->unprocessed_incoming_frames_buffer,
+              nullptr, s->recv_message);
         }
         if (error != GRPC_ERROR_NONE) {
           s->seen_error = true;
-          grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                     &s->frame_storage);
+          grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
           grpc_slice_buffer_reset_and_unref_internal(
-              exec_ctx, &s->unprocessed_incoming_frames_buffer);
+              &s->unprocessed_incoming_frames_buffer);
           break;
         } else if (*s->recv_message != nullptr) {
           break;
@@ -1944,26 +1850,25 @@
       }
     }
     if (error == GRPC_ERROR_NONE && *s->recv_message != nullptr) {
-      null_then_run_closure(exec_ctx, &s->recv_message_ready, GRPC_ERROR_NONE);
+      null_then_run_closure(&s->recv_message_ready, GRPC_ERROR_NONE);
     } else if (s->published_metadata[1] != GRPC_METADATA_NOT_PUBLISHED) {
       *s->recv_message = nullptr;
-      null_then_run_closure(exec_ctx, &s->recv_message_ready, GRPC_ERROR_NONE);
+      null_then_run_closure(&s->recv_message_ready, GRPC_ERROR_NONE);
     }
     GRPC_ERROR_UNREF(error);
   }
 }
 
-void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx* exec_ctx,
-                                                       grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_chttp2_transport* t,
                                                        grpc_chttp2_stream* s) {
-  grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
+  grpc_chttp2_maybe_complete_recv_message(t, s);
   if (s->recv_trailing_metadata_finished != nullptr && s->read_closed &&
       s->write_closed) {
     if (s->seen_error) {
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &s->frame_storage);
+      grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
       if (!s->pending_byte_stream) {
         grpc_slice_buffer_reset_and_unref_internal(
-            exec_ctx, &s->unprocessed_incoming_frames_buffer);
+            &s->unprocessed_incoming_frames_buffer);
       }
     }
     bool pending_data = s->pending_byte_stream ||
@@ -1981,9 +1886,9 @@
               s->stream_decompression_ctx, &s->frame_storage,
               &s->unprocessed_incoming_frames_buffer, nullptr,
               GRPC_HEADER_SIZE_IN_BYTES, &end_of_context)) {
-        grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &s->frame_storage);
+        grpc_slice_buffer_reset_and_unref_internal(&s->frame_storage);
         grpc_slice_buffer_reset_and_unref_internal(
-            exec_ctx, &s->unprocessed_incoming_frames_buffer);
+            &s->unprocessed_incoming_frames_buffer);
         s->seen_error = true;
       } else {
         if (s->unprocessed_incoming_frames_buffer.length > 0) {
@@ -1998,23 +1903,23 @@
     }
     if (s->read_closed && s->frame_storage.length == 0 && !pending_data &&
         s->recv_trailing_metadata_finished != nullptr) {
-      grpc_chttp2_incoming_metadata_buffer_publish(
-          exec_ctx, &s->metadata_buffer[1], s->recv_trailing_metadata);
+      grpc_chttp2_incoming_metadata_buffer_publish(&s->metadata_buffer[1],
+                                                   s->recv_trailing_metadata);
       grpc_chttp2_complete_closure_step(
-          exec_ctx, t, s, &s->recv_trailing_metadata_finished, GRPC_ERROR_NONE,
+          t, s, &s->recv_trailing_metadata_finished, GRPC_ERROR_NONE,
           "recv_trailing_metadata_finished");
     }
   }
 }
 
-static void remove_stream(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                          uint32_t id, grpc_error* error) {
+static void remove_stream(grpc_chttp2_transport* t, uint32_t id,
+                          grpc_error* error) {
   grpc_chttp2_stream* s =
       (grpc_chttp2_stream*)grpc_chttp2_stream_map_delete(&t->stream_map, id);
   GPR_ASSERT(s);
   if (t->incoming_stream == s) {
     t->incoming_stream = nullptr;
-    grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+    grpc_chttp2_parsing_become_skip_parser(t);
   }
   if (s->pending_byte_stream) {
     if (s->on_next != nullptr) {
@@ -2022,8 +1927,8 @@
       if (error == GRPC_ERROR_NONE) {
         error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Truncated message");
       }
-      incoming_byte_stream_publish_error(exec_ctx, bs, error);
-      incoming_byte_stream_unref(exec_ctx, bs);
+      incoming_byte_stream_publish_error(bs, error);
+      incoming_byte_stream_unref(bs);
       s->data_parser.parsing_frame = nullptr;
     } else {
       GRPC_ERROR_UNREF(s->byte_stream_error);
@@ -2032,56 +1937,52 @@
   }
 
   if (grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
-    post_benign_reclaimer(exec_ctx, t);
+    post_benign_reclaimer(t);
     if (t->sent_goaway_state == GRPC_CHTTP2_GOAWAY_SENT) {
       close_transport_locked(
-          exec_ctx, t,
-          GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-              "Last stream closed after sending GOAWAY", &error, 1));
+          t, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                 "Last stream closed after sending GOAWAY", &error, 1));
     }
   }
   if (grpc_chttp2_list_remove_writable_stream(t, s)) {
-    GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:remove_stream");
+    GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:remove_stream");
   }
 
   GRPC_ERROR_UNREF(error);
 
-  maybe_start_some_streams(exec_ctx, t);
+  maybe_start_some_streams(t);
 }
 
-void grpc_chttp2_cancel_stream(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+void grpc_chttp2_cancel_stream(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
                                grpc_error* due_to_error) {
   if (!t->is_client && !s->sent_trailing_metadata &&
       grpc_error_has_clear_grpc_status(due_to_error)) {
-    close_from_api(exec_ctx, t, s, due_to_error);
+    close_from_api(t, s, due_to_error);
     return;
   }
 
   if (!s->read_closed || !s->write_closed) {
     if (s->id != 0) {
       grpc_http2_error_code http_error;
-      grpc_error_get_status(exec_ctx, due_to_error, s->deadline, nullptr,
-                            nullptr, &http_error, nullptr);
+      grpc_error_get_status(due_to_error, s->deadline, nullptr, nullptr,
+                            &http_error, nullptr);
       grpc_slice_buffer_add(
           &t->qbuf, grpc_chttp2_rst_stream_create(s->id, (uint32_t)http_error,
                                                   &s->stats.outgoing));
-      grpc_chttp2_initiate_write(exec_ctx, t,
-                                 GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM);
+      grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM);
     }
   }
   if (due_to_error != GRPC_ERROR_NONE && !s->seen_error) {
     s->seen_error = true;
   }
-  grpc_chttp2_mark_stream_closed(exec_ctx, t, s, 1, 1, due_to_error);
+  grpc_chttp2_mark_stream_closed(t, s, 1, 1, due_to_error);
 }
 
-void grpc_chttp2_fake_status(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                             grpc_chttp2_stream* s, grpc_error* error) {
+void grpc_chttp2_fake_status(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                             grpc_error* error) {
   grpc_status_code status;
   grpc_slice slice;
-  grpc_error_get_status(exec_ctx, error, s->deadline, &status, &slice, nullptr,
-                        nullptr);
+  grpc_error_get_status(error, s->deadline, &status, &slice, nullptr, nullptr);
   if (status != GRPC_STATUS_OK) {
     s->seen_error = true;
   }
@@ -2097,20 +1998,20 @@
     gpr_ltoa(status, status_string);
     GRPC_LOG_IF_ERROR("add_status",
                       grpc_chttp2_incoming_metadata_buffer_replace_or_add(
-                          exec_ctx, &s->metadata_buffer[1],
+                          &s->metadata_buffer[1],
                           grpc_mdelem_from_slices(
-                              exec_ctx, GRPC_MDSTR_GRPC_STATUS,
+                              GRPC_MDSTR_GRPC_STATUS,
                               grpc_slice_from_copied_string(status_string))));
     if (!GRPC_SLICE_IS_EMPTY(slice)) {
       GRPC_LOG_IF_ERROR(
           "add_status_message",
           grpc_chttp2_incoming_metadata_buffer_replace_or_add(
-              exec_ctx, &s->metadata_buffer[1],
-              grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_GRPC_MESSAGE,
+              &s->metadata_buffer[1],
+              grpc_mdelem_from_slices(GRPC_MDSTR_GRPC_MESSAGE,
                                       grpc_slice_ref_internal(slice))));
     }
     s->published_metadata[1] = GRPC_METADATA_SYNTHESIZED_FROM_FAKE;
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
   }
 
   GRPC_ERROR_UNREF(error);
@@ -2143,14 +2044,12 @@
   return error;
 }
 
-static void flush_write_list(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                             grpc_chttp2_stream* s, grpc_chttp2_write_cb** list,
-                             grpc_error* error) {
+static void flush_write_list(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                             grpc_chttp2_write_cb** list, grpc_error* error) {
   while (*list) {
     grpc_chttp2_write_cb* cb = *list;
     *list = cb->next;
-    grpc_chttp2_complete_closure_step(exec_ctx, t, s, &cb->closure,
-                                      GRPC_ERROR_REF(error),
+    grpc_chttp2_complete_closure_step(t, s, &cb->closure, GRPC_ERROR_REF(error),
                                       "on_write_finished_cb");
     cb->next = t->write_cb_pool;
     t->write_cb_pool = cb;
@@ -2158,37 +2057,34 @@
   GRPC_ERROR_UNREF(error);
 }
 
-void grpc_chttp2_fail_pending_writes(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+void grpc_chttp2_fail_pending_writes(grpc_chttp2_transport* t,
                                      grpc_chttp2_stream* s, grpc_error* error) {
   error =
       removal_error(error, s, "Pending writes failed due to stream closure");
   s->send_initial_metadata = nullptr;
-  grpc_chttp2_complete_closure_step(
-      exec_ctx, t, s, &s->send_initial_metadata_finished, GRPC_ERROR_REF(error),
-      "send_initial_metadata_finished");
+  grpc_chttp2_complete_closure_step(t, s, &s->send_initial_metadata_finished,
+                                    GRPC_ERROR_REF(error),
+                                    "send_initial_metadata_finished");
 
   s->send_trailing_metadata = nullptr;
-  grpc_chttp2_complete_closure_step(
-      exec_ctx, t, s, &s->send_trailing_metadata_finished,
-      GRPC_ERROR_REF(error), "send_trailing_metadata_finished");
+  grpc_chttp2_complete_closure_step(t, s, &s->send_trailing_metadata_finished,
+                                    GRPC_ERROR_REF(error),
+                                    "send_trailing_metadata_finished");
 
   s->fetching_send_message = nullptr;
-  grpc_chttp2_complete_closure_step(
-      exec_ctx, t, s, &s->fetching_send_message_finished, GRPC_ERROR_REF(error),
-      "fetching_send_message_finished");
-  flush_write_list(exec_ctx, t, s, &s->on_write_finished_cbs,
-                   GRPC_ERROR_REF(error));
-  flush_write_list(exec_ctx, t, s, &s->on_flow_controlled_cbs, error);
+  grpc_chttp2_complete_closure_step(t, s, &s->fetching_send_message_finished,
+                                    GRPC_ERROR_REF(error),
+                                    "fetching_send_message_finished");
+  flush_write_list(t, s, &s->on_write_finished_cbs, GRPC_ERROR_REF(error));
+  flush_write_list(t, s, &s->on_flow_controlled_cbs, error);
 }
 
-void grpc_chttp2_mark_stream_closed(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t,
+void grpc_chttp2_mark_stream_closed(grpc_chttp2_transport* t,
                                     grpc_chttp2_stream* s, int close_reads,
                                     int close_writes, grpc_error* error) {
   if (s->read_closed && s->write_closed) {
     /* already closed */
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
     GRPC_ERROR_UNREF(error);
     return;
   }
@@ -2202,20 +2098,20 @@
   if (close_writes && !s->write_closed) {
     s->write_closed_error = GRPC_ERROR_REF(error);
     s->write_closed = true;
-    grpc_chttp2_fail_pending_writes(exec_ctx, t, s, GRPC_ERROR_REF(error));
+    grpc_chttp2_fail_pending_writes(t, s, GRPC_ERROR_REF(error));
   }
   if (s->read_closed && s->write_closed) {
     became_closed = true;
     grpc_error* overall_error =
         removal_error(GRPC_ERROR_REF(error), s, "Stream removed");
     if (s->id != 0) {
-      remove_stream(exec_ctx, t, s->id, GRPC_ERROR_REF(overall_error));
+      remove_stream(t, s->id, GRPC_ERROR_REF(overall_error));
     } else {
       /* Purge streams waiting on concurrency still waiting for id assignment */
       grpc_chttp2_list_remove_waiting_for_concurrency(t, s);
     }
     if (overall_error != GRPC_ERROR_NONE) {
-      grpc_chttp2_fake_status(exec_ctx, t, s, overall_error);
+      grpc_chttp2_fake_status(t, s, overall_error);
     }
   }
   if (closed_read) {
@@ -2224,18 +2120,18 @@
         s->published_metadata[i] = GPRC_METADATA_PUBLISHED_AT_CLOSE;
       }
     }
-    grpc_chttp2_maybe_complete_recv_initial_metadata(exec_ctx, t, s);
-    grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_initial_metadata(t, s);
+    grpc_chttp2_maybe_complete_recv_message(t, s);
   }
   if (became_closed) {
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
-    GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2");
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
+    GRPC_CHTTP2_STREAM_UNREF(s, "chttp2");
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void close_from_api(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                           grpc_chttp2_stream* s, grpc_error* error) {
+static void close_from_api(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                           grpc_error* error) {
   grpc_slice hdr;
   grpc_slice status_hdr;
   grpc_slice http_status_hdr;
@@ -2245,8 +2141,8 @@
   uint32_t len = 0;
   grpc_status_code grpc_status;
   grpc_slice slice;
-  grpc_error_get_status(exec_ctx, error, s->deadline, &grpc_status, &slice,
-                        nullptr, nullptr);
+  grpc_error_get_status(error, s->deadline, &grpc_status, &slice, nullptr,
+                        nullptr);
 
   GPR_ASSERT(grpc_status >= 0 && (int)grpc_status < 100);
 
@@ -2388,13 +2284,11 @@
       &t->qbuf, grpc_chttp2_rst_stream_create(s->id, GRPC_HTTP2_NO_ERROR,
                                               &s->stats.outgoing));
 
-  grpc_chttp2_mark_stream_closed(exec_ctx, t, s, 1, 1, error);
-  grpc_chttp2_initiate_write(exec_ctx, t,
-                             GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API);
+  grpc_chttp2_mark_stream_closed(t, s, 1, 1, error);
+  grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_CLOSE_FROM_API);
 }
 
 typedef struct {
-  grpc_exec_ctx* exec_ctx;
   grpc_error* error;
   grpc_chttp2_transport* t;
 } cancel_stream_cb_args;
@@ -2402,13 +2296,11 @@
 static void cancel_stream_cb(void* user_data, uint32_t key, void* stream) {
   cancel_stream_cb_args* args = (cancel_stream_cb_args*)user_data;
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)stream;
-  grpc_chttp2_cancel_stream(args->exec_ctx, args->t, s,
-                            GRPC_ERROR_REF(args->error));
+  grpc_chttp2_cancel_stream(args->t, s, GRPC_ERROR_REF(args->error));
 }
 
-static void end_all_the_calls(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                              grpc_error* error) {
-  cancel_stream_cb_args args = {exec_ctx, error, t};
+static void end_all_the_calls(grpc_chttp2_transport* t, grpc_error* error) {
+  cancel_stream_cb_args args = {error, t};
   grpc_chttp2_stream_map_for_each(&t->stream_map, cancel_stream_cb, &args);
   GRPC_ERROR_UNREF(error);
 }
@@ -2418,14 +2310,14 @@
  */
 
 template <class F>
-static void WithUrgency(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+static void WithUrgency(grpc_chttp2_transport* t,
                         grpc_core::chttp2::FlowControlAction::Urgency urgency,
                         grpc_chttp2_initiate_write_reason reason, F action) {
   switch (urgency) {
     case grpc_core::chttp2::FlowControlAction::Urgency::NO_ACTION_NEEDED:
       break;
     case grpc_core::chttp2::FlowControlAction::Urgency::UPDATE_IMMEDIATELY:
-      grpc_chttp2_initiate_write(exec_ctx, t, reason);
+      grpc_chttp2_initiate_write(t, reason);
     // fallthrough
     case grpc_core::chttp2::FlowControlAction::Urgency::QUEUE_UPDATE:
       action();
@@ -2434,31 +2326,27 @@
 }
 
 void grpc_chttp2_act_on_flowctl_action(
-    grpc_exec_ctx* exec_ctx, const grpc_core::chttp2::FlowControlAction& action,
+    const grpc_core::chttp2::FlowControlAction& action,
     grpc_chttp2_transport* t, grpc_chttp2_stream* s) {
-  WithUrgency(
-      exec_ctx, t, action.send_stream_update(),
-      GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL,
-      [exec_ctx, t, s]() { grpc_chttp2_mark_stream_writable(exec_ctx, t, s); });
-  WithUrgency(exec_ctx, t, action.send_transport_update(),
+  WithUrgency(t, action.send_stream_update(),
+              GRPC_CHTTP2_INITIATE_WRITE_STREAM_FLOW_CONTROL,
+              [t, s]() { grpc_chttp2_mark_stream_writable(t, s); });
+  WithUrgency(t, action.send_transport_update(),
               GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL, []() {});
-  WithUrgency(exec_ctx, t, action.send_initial_window_update(),
-              GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS,
-              [exec_ctx, t, &action]() {
-                queue_setting_update(exec_ctx, t,
+  WithUrgency(t, action.send_initial_window_update(),
+              GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS, [t, &action]() {
+                queue_setting_update(t,
                                      GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE,
                                      action.initial_window_size());
               });
-  WithUrgency(
-      exec_ctx, t, action.send_max_frame_size_update(),
-      GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS, [exec_ctx, t, &action]() {
-        queue_setting_update(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE,
-                             action.max_frame_size());
-      });
+  WithUrgency(t, action.send_max_frame_size_update(),
+              GRPC_CHTTP2_INITIATE_WRITE_SEND_SETTINGS, [t, &action]() {
+                queue_setting_update(t, GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE,
+                                     action.max_frame_size());
+              });
 }
 
-static grpc_error* try_http_parsing(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t) {
+static grpc_error* try_http_parsing(grpc_chttp2_transport* t) {
   grpc_http_parser parser;
   size_t i = 0;
   grpc_error* error = GRPC_ERROR_NONE;
@@ -2487,8 +2375,7 @@
   return error;
 }
 
-static void read_action_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                               grpc_error* error) {
+static void read_action_locked(void* tp, grpc_error* error) {
   GPR_TIMER_BEGIN("reading_action_locked", 0);
 
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
@@ -2512,11 +2399,10 @@
     for (; i < t->read_buffer.count && errors[1] == GRPC_ERROR_NONE; i++) {
       t->flow_control->bdp_estimator()->AddIncomingBytes(
           (int64_t)GRPC_SLICE_LENGTH(t->read_buffer.slices[i]));
-      errors[1] =
-          grpc_chttp2_perform_read(exec_ctx, t, t->read_buffer.slices[i]);
+      errors[1] = grpc_chttp2_perform_read(t, t->read_buffer.slices[i]);
     }
     if (errors[1] != GRPC_ERROR_NONE) {
-      errors[2] = try_http_parsing(exec_ctx, t);
+      errors[2] = try_http_parsing(t);
       GRPC_ERROR_UNREF(error);
       error = GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
           "Failed parsing HTTP/2", errors, GPR_ARRAY_SIZE(errors));
@@ -2531,10 +2417,9 @@
       if (t->initial_window_update > 0) {
         grpc_chttp2_stream* s;
         while (grpc_chttp2_list_pop_stalled_by_stream(t, &s)) {
-          grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+          grpc_chttp2_mark_stream_writable(t, s);
           grpc_chttp2_initiate_write(
-              exec_ctx, t,
-              GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING);
+              t, GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_SETTING);
         }
       }
       t->initial_window_update = 0;
@@ -2555,22 +2440,21 @@
       error = grpc_error_add_child(error, GRPC_ERROR_REF(t->goaway_error));
     }
 
-    close_transport_locked(exec_ctx, t, GRPC_ERROR_REF(error));
+    close_transport_locked(t, GRPC_ERROR_REF(error));
     t->endpoint_reading = 0;
   } else if (t->closed_with_error == GRPC_ERROR_NONE) {
     keep_reading = true;
     GRPC_CHTTP2_REF_TRANSPORT(t, "keep_reading");
   }
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &t->read_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(&t->read_buffer);
 
   if (keep_reading) {
-    grpc_endpoint_read(exec_ctx, t->ep, &t->read_buffer,
-                       &t->read_action_locked);
-    grpc_chttp2_act_on_flowctl_action(exec_ctx, t->flow_control->MakeAction(),
-                                      t, nullptr);
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "keep_reading");
+    grpc_endpoint_read(t->ep, &t->read_buffer, &t->read_action_locked);
+    grpc_chttp2_act_on_flowctl_action(t->flow_control->MakeAction(), t,
+                                      nullptr);
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "keep_reading");
   } else {
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "reading_action");
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "reading_action");
   }
 
   GPR_TIMER_END("post_reading_action_locked", 0);
@@ -2582,15 +2466,12 @@
 
 // t is reffed prior to calling the first time, and once the callback chain
 // that kicks off finishes, it's unreffed
-static void schedule_bdp_ping_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t) {
+static void schedule_bdp_ping_locked(grpc_chttp2_transport* t) {
   t->flow_control->bdp_estimator()->SchedulePing();
-  send_ping_locked(exec_ctx, t, &t->start_bdp_ping_locked,
-                   &t->finish_bdp_ping_locked);
+  send_ping_locked(t, &t->start_bdp_ping_locked, &t->finish_bdp_ping_locked);
 }
 
-static void start_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                  grpc_error* error) {
+static void start_bdp_ping_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   if (grpc_http_trace.enabled()) {
     gpr_log(GPR_DEBUG, "%s: Start BDP ping err=%s", t->peer_string,
@@ -2598,42 +2479,39 @@
   }
   /* Reset the keepalive ping timer */
   if (t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_WAITING) {
-    grpc_timer_cancel(exec_ctx, &t->keepalive_ping_timer);
+    grpc_timer_cancel(&t->keepalive_ping_timer);
   }
   t->flow_control->bdp_estimator()->StartPing();
 }
 
-static void finish_bdp_ping_locked(grpc_exec_ctx* exec_ctx, void* tp,
-                                   grpc_error* error) {
+static void finish_bdp_ping_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   if (grpc_http_trace.enabled()) {
     gpr_log(GPR_DEBUG, "%s: Complete BDP ping err=%s", t->peer_string,
             grpc_error_string(error));
   }
   if (error != GRPC_ERROR_NONE) {
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "bdp_ping");
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "bdp_ping");
     return;
   }
-  grpc_millis next_ping =
-      t->flow_control->bdp_estimator()->CompletePing(exec_ctx);
-  grpc_chttp2_act_on_flowctl_action(
-      exec_ctx, t->flow_control->PeriodicUpdate(exec_ctx), t, nullptr);
+  grpc_millis next_ping = t->flow_control->bdp_estimator()->CompletePing();
+  grpc_chttp2_act_on_flowctl_action(t->flow_control->PeriodicUpdate(), t,
+                                    nullptr);
   GPR_ASSERT(!t->have_next_bdp_ping_timer);
   t->have_next_bdp_ping_timer = true;
-  grpc_timer_init(exec_ctx, &t->next_bdp_ping_timer, next_ping,
+  grpc_timer_init(&t->next_bdp_ping_timer, next_ping,
                   &t->next_bdp_ping_timer_expired_locked);
 }
 
-static void next_bdp_ping_timer_expired_locked(grpc_exec_ctx* exec_ctx,
-                                               void* tp, grpc_error* error) {
+static void next_bdp_ping_timer_expired_locked(void* tp, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   GPR_ASSERT(t->have_next_bdp_ping_timer);
   t->have_next_bdp_ping_timer = false;
   if (error != GRPC_ERROR_NONE) {
-    GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "bdp_ping");
+    GRPC_CHTTP2_UNREF_TRANSPORT(t, "bdp_ping");
     return;
   }
-  schedule_bdp_ping_locked(exec_ctx, t);
+  schedule_bdp_ping_locked(t);
 }
 
 void grpc_chttp2_config_default_keepalive_args(grpc_channel_args* args,
@@ -2694,8 +2572,7 @@
   }
 }
 
-static void init_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                       grpc_error* error) {
+static void init_keepalive_ping_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   GPR_ASSERT(t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_WAITING);
   if (t->destroying || t->closed_with_error != GRPC_ERROR_NONE) {
@@ -2705,59 +2582,55 @@
         grpc_chttp2_stream_map_size(&t->stream_map) > 0) {
       t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_PINGING;
       GRPC_CHTTP2_REF_TRANSPORT(t, "keepalive ping end");
-      send_ping_locked(exec_ctx, t, &t->start_keepalive_ping_locked,
+      send_ping_locked(t, &t->start_keepalive_ping_locked,
                        &t->finish_keepalive_ping_locked);
-      grpc_chttp2_initiate_write(exec_ctx, t,
-                                 GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING);
+      grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_KEEPALIVE_PING);
     } else {
       GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
-      grpc_timer_init(exec_ctx, &t->keepalive_ping_timer,
-                      grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+      grpc_timer_init(&t->keepalive_ping_timer,
+                      grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                       &t->init_keepalive_ping_locked);
     }
   } else if (error == GRPC_ERROR_CANCELLED) {
     /* The keepalive ping timer may be cancelled by bdp */
     GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
-    grpc_timer_init(exec_ctx, &t->keepalive_ping_timer,
-                    grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+    grpc_timer_init(&t->keepalive_ping_timer,
+                    grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                     &t->init_keepalive_ping_locked);
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "init keepalive ping");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "init keepalive ping");
 }
 
-static void start_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void start_keepalive_ping_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   GRPC_CHTTP2_REF_TRANSPORT(t, "keepalive watchdog");
-  grpc_timer_init(exec_ctx, &t->keepalive_watchdog_timer,
-                  grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+  grpc_timer_init(&t->keepalive_watchdog_timer,
+                  grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                   &t->keepalive_watchdog_fired_locked);
 }
 
-static void finish_keepalive_ping_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error) {
+static void finish_keepalive_ping_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   if (t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_PINGING) {
     if (error == GRPC_ERROR_NONE) {
       t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_WAITING;
-      grpc_timer_cancel(exec_ctx, &t->keepalive_watchdog_timer);
+      grpc_timer_cancel(&t->keepalive_watchdog_timer);
       GRPC_CHTTP2_REF_TRANSPORT(t, "init keepalive ping");
-      grpc_timer_init(exec_ctx, &t->keepalive_ping_timer,
-                      grpc_exec_ctx_now(exec_ctx) + t->keepalive_time,
+      grpc_timer_init(&t->keepalive_ping_timer,
+                      grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
                       &t->init_keepalive_ping_locked);
     }
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "keepalive ping end");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "keepalive ping end");
 }
 
-static void keepalive_watchdog_fired_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                            grpc_error* error) {
+static void keepalive_watchdog_fired_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   if (t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_PINGING) {
     if (error == GRPC_ERROR_NONE) {
       t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_DYING;
       close_transport_locked(
-          exec_ctx, t,
+          t,
           grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                  "keepalive watchdog timeout"),
                              GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_INTERNAL));
@@ -2770,71 +2643,67 @@
               t->keepalive_state, GRPC_CHTTP2_KEEPALIVE_STATE_PINGING);
     }
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "keepalive watchdog");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "keepalive watchdog");
 }
 
 /*******************************************************************************
  * CALLBACK LOOP
  */
 
-static void connectivity_state_set(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_transport* t,
+static void connectivity_state_set(grpc_chttp2_transport* t,
                                    grpc_connectivity_state state,
                                    grpc_error* error, const char* reason) {
   GRPC_CHTTP2_IF_TRACING(
       gpr_log(GPR_DEBUG, "set connectivity_state=%d", state));
-  grpc_connectivity_state_set(exec_ctx, &t->channel_callback.state_tracker,
-                              state, error, reason);
+  grpc_connectivity_state_set(&t->channel_callback.state_tracker, state, error,
+                              reason);
 }
 
 /*******************************************************************************
  * POLLSET STUFF
  */
 
-static void set_pollset(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                        grpc_stream* gs, grpc_pollset* pollset) {
+static void set_pollset(grpc_transport* gt, grpc_stream* gs,
+                        grpc_pollset* pollset) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  grpc_endpoint_add_to_pollset(exec_ctx, t->ep, pollset);
+  grpc_endpoint_add_to_pollset(t->ep, pollset);
 }
 
-static void set_pollset_set(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                            grpc_stream* gs, grpc_pollset_set* pollset_set) {
+static void set_pollset_set(grpc_transport* gt, grpc_stream* gs,
+                            grpc_pollset_set* pollset_set) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  grpc_endpoint_add_to_pollset_set(exec_ctx, t->ep, pollset_set);
+  grpc_endpoint_add_to_pollset_set(t->ep, pollset_set);
 }
 
 /*******************************************************************************
  * BYTE STREAM
  */
 
-static void reset_byte_stream(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void reset_byte_stream(void* arg, grpc_error* error) {
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)arg;
 
   s->pending_byte_stream = false;
   if (error == GRPC_ERROR_NONE) {
-    grpc_chttp2_maybe_complete_recv_message(exec_ctx, s->t, s);
-    grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, s->t, s);
+    grpc_chttp2_maybe_complete_recv_message(s->t, s);
+    grpc_chttp2_maybe_complete_recv_trailing_metadata(s->t, s);
   } else {
     GPR_ASSERT(error != GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(exec_ctx, s->on_next, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(s->on_next, GRPC_ERROR_REF(error));
     s->on_next = nullptr;
     GRPC_ERROR_UNREF(s->byte_stream_error);
     s->byte_stream_error = GRPC_ERROR_NONE;
-    grpc_chttp2_cancel_stream(exec_ctx, s->t, s, GRPC_ERROR_REF(error));
+    grpc_chttp2_cancel_stream(s->t, s, GRPC_ERROR_REF(error));
     s->byte_stream_error = GRPC_ERROR_REF(error);
   }
 }
 
-static void incoming_byte_stream_unref(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_incoming_byte_stream* bs) {
+static void incoming_byte_stream_unref(grpc_chttp2_incoming_byte_stream* bs) {
   if (gpr_unref(&bs->refs)) {
     gpr_free(bs);
   }
 }
 
-static void incoming_byte_stream_next_locked(grpc_exec_ctx* exec_ctx,
-                                             void* argp,
+static void incoming_byte_stream_next_locked(void* argp,
                                              grpc_error* error_ignored) {
   grpc_chttp2_incoming_byte_stream* bs =
       (grpc_chttp2_incoming_byte_stream*)argp;
@@ -2845,30 +2714,29 @@
   if (!s->read_closed) {
     s->flow_control->IncomingByteStreamUpdate(bs->next_action.max_size_hint,
                                               cur_length);
-    grpc_chttp2_act_on_flowctl_action(exec_ctx, s->flow_control->MakeAction(),
-                                      t, s);
+    grpc_chttp2_act_on_flowctl_action(s->flow_control->MakeAction(), t, s);
   }
   GPR_ASSERT(s->unprocessed_incoming_frames_buffer.length == 0);
   if (s->frame_storage.length > 0) {
     grpc_slice_buffer_swap(&s->frame_storage,
                            &s->unprocessed_incoming_frames_buffer);
     s->unprocessed_incoming_frames_decompressed = false;
-    GRPC_CLOSURE_SCHED(exec_ctx, bs->next_action.on_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(bs->next_action.on_complete, GRPC_ERROR_NONE);
   } else if (s->byte_stream_error != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, bs->next_action.on_complete,
+    GRPC_CLOSURE_SCHED(bs->next_action.on_complete,
                        GRPC_ERROR_REF(s->byte_stream_error));
     if (s->data_parser.parsing_frame != nullptr) {
-      incoming_byte_stream_unref(exec_ctx, s->data_parser.parsing_frame);
+      incoming_byte_stream_unref(s->data_parser.parsing_frame);
       s->data_parser.parsing_frame = nullptr;
     }
   } else if (s->read_closed) {
     if (bs->remaining_bytes != 0) {
       s->byte_stream_error =
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Truncated message");
-      GRPC_CLOSURE_SCHED(exec_ctx, bs->next_action.on_complete,
+      GRPC_CLOSURE_SCHED(bs->next_action.on_complete,
                          GRPC_ERROR_REF(s->byte_stream_error));
       if (s->data_parser.parsing_frame != nullptr) {
-        incoming_byte_stream_unref(exec_ctx, s->data_parser.parsing_frame);
+        incoming_byte_stream_unref(s->data_parser.parsing_frame);
         s->data_parser.parsing_frame = nullptr;
       }
     } else {
@@ -2878,11 +2746,10 @@
   } else {
     s->on_next = bs->next_action.on_complete;
   }
-  incoming_byte_stream_unref(exec_ctx, bs);
+  incoming_byte_stream_unref(bs);
 }
 
-static bool incoming_byte_stream_next(grpc_exec_ctx* exec_ctx,
-                                      grpc_byte_stream* byte_stream,
+static bool incoming_byte_stream_next(grpc_byte_stream* byte_stream,
                                       size_t max_size_hint,
                                       grpc_closure* on_complete) {
   GPR_TIMER_BEGIN("incoming_byte_stream_next", 0);
@@ -2897,7 +2764,6 @@
     bs->next_action.max_size_hint = max_size_hint;
     bs->next_action.on_complete = on_complete;
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_INIT(&bs->next_action.closure,
                           incoming_byte_stream_next_locked, bs,
                           grpc_combiner_scheduler(bs->transport->combiner)),
@@ -2907,8 +2773,7 @@
   }
 }
 
-static grpc_error* incoming_byte_stream_pull(grpc_exec_ctx* exec_ctx,
-                                             grpc_byte_stream* byte_stream,
+static grpc_error* incoming_byte_stream_pull(grpc_byte_stream* byte_stream,
                                              grpc_slice* slice) {
   GPR_TIMER_BEGIN("incoming_byte_stream_pull", 0);
   grpc_chttp2_incoming_byte_stream* bs =
@@ -2944,31 +2809,28 @@
       }
     }
     error = grpc_deframe_unprocessed_incoming_frames(
-        exec_ctx, &s->data_parser, s, &s->unprocessed_incoming_frames_buffer,
-        slice, nullptr);
+        &s->data_parser, s, &s->unprocessed_incoming_frames_buffer, slice,
+        nullptr);
     if (error != GRPC_ERROR_NONE) {
       return error;
     }
   } else {
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Truncated message");
-    GRPC_CLOSURE_SCHED(exec_ctx, &s->reset_byte_stream, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(&s->reset_byte_stream, GRPC_ERROR_REF(error));
     return error;
   }
   GPR_TIMER_END("incoming_byte_stream_pull", 0);
   return GRPC_ERROR_NONE;
 }
 
-static void incoming_byte_stream_destroy_locked(grpc_exec_ctx* exec_ctx,
-                                                void* byte_stream,
+static void incoming_byte_stream_destroy_locked(void* byte_stream,
                                                 grpc_error* error_ignored);
 
-static void incoming_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
-                                         grpc_byte_stream* byte_stream) {
+static void incoming_byte_stream_destroy(grpc_byte_stream* byte_stream) {
   GPR_TIMER_BEGIN("incoming_byte_stream_destroy", 0);
   grpc_chttp2_incoming_byte_stream* bs =
       (grpc_chttp2_incoming_byte_stream*)byte_stream;
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_INIT(&bs->destroy_action,
                         incoming_byte_stream_destroy_locked, bs,
                         grpc_combiner_scheduler(bs->transport->combiner)),
@@ -2977,30 +2839,28 @@
 }
 
 static void incoming_byte_stream_publish_error(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error) {
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error) {
   grpc_chttp2_stream* s = bs->stream;
 
   GPR_ASSERT(error != GRPC_ERROR_NONE);
-  GRPC_CLOSURE_SCHED(exec_ctx, s->on_next, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(s->on_next, GRPC_ERROR_REF(error));
   s->on_next = nullptr;
   GRPC_ERROR_UNREF(s->byte_stream_error);
   s->byte_stream_error = GRPC_ERROR_REF(error);
-  grpc_chttp2_cancel_stream(exec_ctx, bs->transport, bs->stream,
-                            GRPC_ERROR_REF(error));
+  grpc_chttp2_cancel_stream(bs->transport, bs->stream, GRPC_ERROR_REF(error));
 }
 
 grpc_error* grpc_chttp2_incoming_byte_stream_push(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_slice slice, grpc_slice* slice_out) {
+    grpc_chttp2_incoming_byte_stream* bs, grpc_slice slice,
+    grpc_slice* slice_out) {
   grpc_chttp2_stream* s = bs->stream;
 
   if (bs->remaining_bytes < GRPC_SLICE_LENGTH(slice)) {
     grpc_error* error =
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Too many bytes in stream");
 
-    GRPC_CLOSURE_SCHED(exec_ctx, &s->reset_byte_stream, GRPC_ERROR_REF(error));
-    grpc_slice_unref_internal(exec_ctx, slice);
+    GRPC_CLOSURE_SCHED(&s->reset_byte_stream, GRPC_ERROR_REF(error));
+    grpc_slice_unref_internal(slice);
     return error;
   } else {
     bs->remaining_bytes -= (uint32_t)GRPC_SLICE_LENGTH(slice);
@@ -3012,8 +2872,8 @@
 }
 
 grpc_error* grpc_chttp2_incoming_byte_stream_finished(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error, bool reset_on_error) {
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error,
+    bool reset_on_error) {
   grpc_chttp2_stream* s = bs->stream;
 
   if (error == GRPC_ERROR_NONE) {
@@ -3022,27 +2882,25 @@
     }
   }
   if (error != GRPC_ERROR_NONE && reset_on_error) {
-    GRPC_CLOSURE_SCHED(exec_ctx, &s->reset_byte_stream, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(&s->reset_byte_stream, GRPC_ERROR_REF(error));
   }
-  incoming_byte_stream_unref(exec_ctx, bs);
+  incoming_byte_stream_unref(bs);
   return error;
 }
 
-static void incoming_byte_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                                          grpc_byte_stream* byte_stream,
+static void incoming_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                           grpc_error* error) {
   grpc_chttp2_incoming_byte_stream* bs =
       (grpc_chttp2_incoming_byte_stream*)byte_stream;
   GRPC_ERROR_UNREF(grpc_chttp2_incoming_byte_stream_finished(
-      exec_ctx, bs, error, true /* reset_on_error */));
+      bs, error, true /* reset_on_error */));
 }
 
 static const grpc_byte_stream_vtable grpc_chttp2_incoming_byte_stream_vtable = {
     incoming_byte_stream_next, incoming_byte_stream_pull,
     incoming_byte_stream_shutdown, incoming_byte_stream_destroy};
 
-static void incoming_byte_stream_destroy_locked(grpc_exec_ctx* exec_ctx,
-                                                void* byte_stream,
+static void incoming_byte_stream_destroy_locked(void* byte_stream,
                                                 grpc_error* error_ignored) {
   grpc_chttp2_incoming_byte_stream* bs =
       (grpc_chttp2_incoming_byte_stream*)byte_stream;
@@ -3050,15 +2908,15 @@
   grpc_chttp2_transport* t = s->t;
 
   GPR_ASSERT(bs->base.vtable == &grpc_chttp2_incoming_byte_stream_vtable);
-  incoming_byte_stream_unref(exec_ctx, bs);
+  incoming_byte_stream_unref(bs);
   s->pending_byte_stream = false;
-  grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
-  grpc_chttp2_maybe_complete_recv_trailing_metadata(exec_ctx, t, s);
+  grpc_chttp2_maybe_complete_recv_message(t, s);
+  grpc_chttp2_maybe_complete_recv_trailing_metadata(t, s);
 }
 
 grpc_chttp2_incoming_byte_stream* grpc_chttp2_incoming_byte_stream_create(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t, grpc_chttp2_stream* s,
-    uint32_t frame_size, uint32_t flags) {
+    grpc_chttp2_transport* t, grpc_chttp2_stream* s, uint32_t frame_size,
+    uint32_t flags) {
   grpc_chttp2_incoming_byte_stream* incoming_byte_stream =
       (grpc_chttp2_incoming_byte_stream*)gpr_malloc(
           sizeof(*incoming_byte_stream));
@@ -3078,30 +2936,25 @@
  * RESOURCE QUOTAS
  */
 
-static void post_benign_reclaimer(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_transport* t) {
+static void post_benign_reclaimer(grpc_chttp2_transport* t) {
   if (!t->benign_reclaimer_registered) {
     t->benign_reclaimer_registered = true;
     GRPC_CHTTP2_REF_TRANSPORT(t, "benign_reclaimer");
-    grpc_resource_user_post_reclaimer(exec_ctx,
-                                      grpc_endpoint_get_resource_user(t->ep),
+    grpc_resource_user_post_reclaimer(grpc_endpoint_get_resource_user(t->ep),
                                       false, &t->benign_reclaimer_locked);
   }
 }
 
-static void post_destructive_reclaimer(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_transport* t) {
+static void post_destructive_reclaimer(grpc_chttp2_transport* t) {
   if (!t->destructive_reclaimer_registered) {
     t->destructive_reclaimer_registered = true;
     GRPC_CHTTP2_REF_TRANSPORT(t, "destructive_reclaimer");
-    grpc_resource_user_post_reclaimer(exec_ctx,
-                                      grpc_endpoint_get_resource_user(t->ep),
+    grpc_resource_user_post_reclaimer(grpc_endpoint_get_resource_user(t->ep),
                                       true, &t->destructive_reclaimer_locked);
   }
 }
 
-static void benign_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                    grpc_error* error) {
+static void benign_reclaimer_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   if (error == GRPC_ERROR_NONE &&
       grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
@@ -3111,7 +2964,7 @@
       gpr_log(GPR_DEBUG, "HTTP2: %s - send goaway to free memory",
               t->peer_string);
     }
-    send_goaway(exec_ctx, t,
+    send_goaway(t,
                 grpc_error_set_int(
                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("Buffers full"),
                     GRPC_ERROR_INT_HTTP2_ERROR, GRPC_HTTP2_ENHANCE_YOUR_CALM));
@@ -3124,13 +2977,12 @@
   t->benign_reclaimer_registered = false;
   if (error != GRPC_ERROR_CANCELLED) {
     grpc_resource_user_finish_reclamation(
-        exec_ctx, grpc_endpoint_get_resource_user(t->ep));
+        grpc_endpoint_get_resource_user(t->ep));
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "benign_reclaimer");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "benign_reclaimer");
 }
 
-static void destructive_reclaimer_locked(grpc_exec_ctx* exec_ctx, void* arg,
-                                         grpc_error* error) {
+static void destructive_reclaimer_locked(void* arg, grpc_error* error) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
   size_t n = grpc_chttp2_stream_map_size(&t->stream_map);
   t->destructive_reclaimer_registered = false;
@@ -3142,7 +2994,7 @@
               s->id);
     }
     grpc_chttp2_cancel_stream(
-        exec_ctx, t, s,
+        t, s,
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING("Buffers full"),
                            GRPC_ERROR_INT_HTTP2_ERROR,
                            GRPC_HTTP2_ENHANCE_YOUR_CALM));
@@ -3151,14 +3003,14 @@
          there are more streams left, we can immediately post a new
          reclaimer in case the resource quota needs to free more
          memory */
-      post_destructive_reclaimer(exec_ctx, t);
+      post_destructive_reclaimer(t);
     }
   }
   if (error != GRPC_ERROR_CANCELLED) {
     grpc_resource_user_finish_reclamation(
-        exec_ctx, grpc_endpoint_get_resource_user(t->ep));
+        grpc_endpoint_get_resource_user(t->ep));
   }
-  GRPC_CHTTP2_UNREF_TRANSPORT(exec_ctx, t, "destructive_reclaimer");
+  GRPC_CHTTP2_UNREF_TRANSPORT(t, "destructive_reclaimer");
 }
 
 /*******************************************************************************
@@ -3212,8 +3064,7 @@
   GPR_UNREACHABLE_CODE(return "unknown");
 }
 
-static grpc_endpoint* chttp2_get_endpoint(grpc_exec_ctx* exec_ctx,
-                                          grpc_transport* t) {
+static grpc_endpoint* chttp2_get_endpoint(grpc_transport* t) {
   return ((grpc_chttp2_transport*)t)->ep;
 }
 
@@ -3231,17 +3082,16 @@
 static const grpc_transport_vtable* get_vtable(void) { return &vtable; }
 
 grpc_transport* grpc_create_chttp2_transport(
-    grpc_exec_ctx* exec_ctx, const grpc_channel_args* channel_args,
-    grpc_endpoint* ep, int is_client) {
+    const grpc_channel_args* channel_args, grpc_endpoint* ep, bool is_client) {
   grpc_chttp2_transport* t =
       (grpc_chttp2_transport*)gpr_zalloc(sizeof(grpc_chttp2_transport));
-  init_transport(exec_ctx, t, channel_args, ep, is_client != 0);
+  init_transport(t, channel_args, ep, is_client);
   return &t->base;
 }
 
-void grpc_chttp2_transport_start_reading(grpc_exec_ctx* exec_ctx,
-                                         grpc_transport* transport,
-                                         grpc_slice_buffer* read_buffer) {
+void grpc_chttp2_transport_start_reading(
+    grpc_transport* transport, grpc_slice_buffer* read_buffer,
+    grpc_closure* notify_on_receive_settings) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)transport;
   GRPC_CHTTP2_REF_TRANSPORT(
       t, "reading_action"); /* matches unref inside reading_action */
@@ -3249,5 +3099,6 @@
     grpc_slice_buffer_move_into(read_buffer, &t->read_buffer);
     gpr_free(read_buffer);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, &t->read_action_locked, GRPC_ERROR_NONE);
+  t->notify_on_receive_settings = notify_on_receive_settings;
+  GRPC_CLOSURE_SCHED(&t->read_action_locked, GRPC_ERROR_NONE);
 }
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.h b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
index 369dc34..596abab 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.h
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
@@ -28,13 +28,14 @@
 extern grpc_core::DebugOnlyTraceFlag grpc_trace_chttp2_refcount;
 
 grpc_transport* grpc_create_chttp2_transport(
-    grpc_exec_ctx* exec_ctx, const grpc_channel_args* channel_args,
-    grpc_endpoint* ep, int is_client);
+    const grpc_channel_args* channel_args, grpc_endpoint* ep, bool is_client);
 
 /// Takes ownership of \a read_buffer, which (if non-NULL) contains
 /// leftover bytes previously read from the endpoint (e.g., by handshakers).
-void grpc_chttp2_transport_start_reading(grpc_exec_ctx* exec_ctx,
-                                         grpc_transport* transport,
-                                         grpc_slice_buffer* read_buffer);
+/// If non-null, \a notify_on_receive_settings will be scheduled when
+/// HTTP/2 settings are received from the peer.
+void grpc_chttp2_transport_start_reading(
+    grpc_transport* transport, grpc_slice_buffer* read_buffer,
+    grpc_closure* notify_on_receive_settings);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CHTTP2_TRANSPORT_H */
diff --git a/src/core/ext/transport/chttp2/transport/flow_control.cc b/src/core/ext/transport/chttp2/transport/flow_control.cc
index 8a057bd..ca48cc7 100644
--- a/src/core/ext/transport/chttp2/transport/flow_control.cc
+++ b/src/core/ext/transport/chttp2/transport/flow_control.cc
@@ -149,8 +149,7 @@
   gpr_free(mf_str);
 }
 
-TransportFlowControl::TransportFlowControl(grpc_exec_ctx* exec_ctx,
-                                           const grpc_chttp2_transport* t,
+TransportFlowControl::TransportFlowControl(const grpc_chttp2_transport* t,
                                            bool enable_bdp_probe)
     : t_(t),
       enable_bdp_probe_(enable_bdp_probe),
@@ -163,7 +162,7 @@
                           .set_min_control_value(-1)
                           .set_max_control_value(25)
                           .set_integral_range(10)),
-      last_pid_update_(grpc_exec_ctx_now(exec_ctx)) {}
+      last_pid_update_(grpc_core::ExecCtx::Get()->Now()) {}
 
 uint32_t TransportFlowControl::MaybeSendUpdate(bool writing_anyway) {
   FlowControlTrace trace("t updt sent", this, nullptr);
@@ -308,9 +307,8 @@
       1 + log2(bdp_estimator_.EstimateBdp()));
 }
 
-double TransportFlowControl::SmoothLogBdp(grpc_exec_ctx* exec_ctx,
-                                          double value) {
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+double TransportFlowControl::SmoothLogBdp(double value) {
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   double bdp_error = value - pid_controller_.last_control_value();
   const double dt = (double)(now - last_pid_update_) * 1e-3;
   last_pid_update_ = now;
@@ -331,15 +329,14 @@
   }
 }
 
-FlowControlAction TransportFlowControl::PeriodicUpdate(
-    grpc_exec_ctx* exec_ctx) {
+FlowControlAction TransportFlowControl::PeriodicUpdate() {
   FlowControlAction action;
   if (enable_bdp_probe_) {
     // get bdp estimate and update initial_window accordingly.
     // target might change based on how much memory pressure we are under
     // TODO(ncteisen): experiment with setting target to be huge under low
     // memory pressure.
-    const double target = pow(2, SmoothLogBdp(exec_ctx, TargetLogBdp()));
+    const double target = pow(2, SmoothLogBdp(TargetLogBdp()));
 
     // Though initial window 'could' drop to 0, we keep the floor at 128
     target_initial_window_size_ = (int32_t)GPR_CLAMP(target, 128, INT32_MAX);
diff --git a/src/core/ext/transport/chttp2/transport/flow_control.h b/src/core/ext/transport/chttp2/transport/flow_control.h
index 2515c94..8306047 100644
--- a/src/core/ext/transport/chttp2/transport/flow_control.h
+++ b/src/core/ext/transport/chttp2/transport/flow_control.h
@@ -134,8 +134,7 @@
 
 class TransportFlowControl {
  public:
-  TransportFlowControl(grpc_exec_ctx* exec_ctx, const grpc_chttp2_transport* t,
-                       bool enable_bdp_probe);
+  TransportFlowControl(const grpc_chttp2_transport* t, bool enable_bdp_probe);
   ~TransportFlowControl() {}
 
   bool bdp_probe() const { return enable_bdp_probe_; }
@@ -153,7 +152,7 @@
   // Call periodically (at a low-ish rate, 100ms - 10s makes sense)
   // to perform more complex flow control calculations and return an action
   // to let chttp2 change its parameters
-  FlowControlAction PeriodicUpdate(grpc_exec_ctx* exec_ctx);
+  FlowControlAction PeriodicUpdate();
 
   void StreamSentData(int64_t size) { remote_window_ -= size; }
 
@@ -212,7 +211,7 @@
  private:
   friend class ::grpc::testing::TrickledCHTTP2;
   double TargetLogBdp();
-  double SmoothLogBdp(grpc_exec_ctx* exec_ctx, double value);
+  double SmoothLogBdp(double value);
   FlowControlAction::Urgency DeltaUrgency(int32_t value,
                                           grpc_chttp2_setting_id setting_id);
 
diff --git a/src/core/ext/transport/chttp2/transport/frame_data.cc b/src/core/ext/transport/chttp2/transport/frame_data.cc
index f0c3b55..9b3a6ac 100644
--- a/src/core/ext/transport/chttp2/transport/frame_data.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_data.cc
@@ -36,11 +36,10 @@
   return GRPC_ERROR_NONE;
 }
 
-void grpc_chttp2_data_parser_destroy(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_data_parser* parser) {
+void grpc_chttp2_data_parser_destroy(grpc_chttp2_data_parser* parser) {
   if (parser->parsing_frame != nullptr) {
     GRPC_ERROR_UNREF(grpc_chttp2_incoming_byte_stream_finished(
-        exec_ctx, parser->parsing_frame,
+        parser->parsing_frame,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Parser destroyed"), false));
   }
   GRPC_ERROR_UNREF(parser->error);
@@ -98,7 +97,7 @@
 }
 
 grpc_error* grpc_deframe_unprocessed_incoming_frames(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_data_parser* p, grpc_chttp2_stream* s,
+    grpc_chttp2_data_parser* p, grpc_chttp2_stream* s,
     grpc_slice_buffer* slices, grpc_slice* slice_out,
     grpc_byte_stream** stream_out) {
   grpc_error* error = GRPC_ERROR_NONE;
@@ -118,14 +117,14 @@
     char* msg;
 
     if (cur == end) {
-      grpc_slice_unref_internal(exec_ctx, slice);
+      grpc_slice_unref_internal(slice);
       continue;
     }
 
     switch (p->state) {
       case GRPC_CHTTP2_DATA_ERROR:
         p->state = GRPC_CHTTP2_DATA_ERROR;
-        grpc_slice_unref_internal(exec_ctx, slice);
+        grpc_slice_unref_internal(slice);
         return GRPC_ERROR_REF(p->error);
       case GRPC_CHTTP2_DATA_FH_0:
         s->stats.incoming.framing_bytes++;
@@ -150,12 +149,12 @@
             p->error =
                 grpc_error_set_int(p->error, GRPC_ERROR_INT_OFFSET, cur - beg);
             p->state = GRPC_CHTTP2_DATA_ERROR;
-            grpc_slice_unref_internal(exec_ctx, slice);
+            grpc_slice_unref_internal(slice);
             return GRPC_ERROR_REF(p->error);
         }
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_1;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
       /* fallthrough */
@@ -164,7 +163,7 @@
         p->frame_size = ((uint32_t)*cur) << 24;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_2;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
       /* fallthrough */
@@ -173,7 +172,7 @@
         p->frame_size |= ((uint32_t)*cur) << 16;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_3;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
       /* fallthrough */
@@ -182,7 +181,7 @@
         p->frame_size |= ((uint32_t)*cur) << 8;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_4;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
       /* fallthrough */
@@ -198,11 +197,11 @@
           message_flags |= GRPC_WRITE_INTERNAL_COMPRESS;
         }
         p->parsing_frame = grpc_chttp2_incoming_byte_stream_create(
-            exec_ctx, t, s, p->frame_size, message_flags);
+            t, s, p->frame_size, message_flags);
         *stream_out = &p->parsing_frame->base;
         if (p->parsing_frame->remaining_bytes == 0) {
           GRPC_ERROR_UNREF(grpc_chttp2_incoming_byte_stream_finished(
-              exec_ctx, p->parsing_frame, GRPC_ERROR_NONE, true));
+              p->parsing_frame, GRPC_ERROR_NONE, true));
           p->parsing_frame = nullptr;
           p->state = GRPC_CHTTP2_DATA_FH_0;
         }
@@ -213,64 +212,64 @@
               slices,
               grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
         }
-        grpc_slice_unref_internal(exec_ctx, slice);
+        grpc_slice_unref_internal(slice);
         return GRPC_ERROR_NONE;
       case GRPC_CHTTP2_DATA_FRAME: {
         GPR_ASSERT(p->parsing_frame != nullptr);
         GPR_ASSERT(slice_out != nullptr);
         if (cur == end) {
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           continue;
         }
         uint32_t remaining = (uint32_t)(end - cur);
         if (remaining == p->frame_size) {
           s->stats.incoming.data_bytes += remaining;
           if (GRPC_ERROR_NONE != (error = grpc_chttp2_incoming_byte_stream_push(
-                                      exec_ctx, p->parsing_frame,
+                                      p->parsing_frame,
                                       grpc_slice_sub(slice, (size_t)(cur - beg),
                                                      (size_t)(end - beg)),
                                       slice_out))) {
-            grpc_slice_unref_internal(exec_ctx, slice);
+            grpc_slice_unref_internal(slice);
             return error;
           }
           if (GRPC_ERROR_NONE !=
               (error = grpc_chttp2_incoming_byte_stream_finished(
-                   exec_ctx, p->parsing_frame, GRPC_ERROR_NONE, true))) {
-            grpc_slice_unref_internal(exec_ctx, slice);
+                   p->parsing_frame, GRPC_ERROR_NONE, true))) {
+            grpc_slice_unref_internal(slice);
             return error;
           }
           p->parsing_frame = nullptr;
           p->state = GRPC_CHTTP2_DATA_FH_0;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           return GRPC_ERROR_NONE;
         } else if (remaining < p->frame_size) {
           s->stats.incoming.data_bytes += remaining;
           if (GRPC_ERROR_NONE != (error = grpc_chttp2_incoming_byte_stream_push(
-                                      exec_ctx, p->parsing_frame,
+                                      p->parsing_frame,
                                       grpc_slice_sub(slice, (size_t)(cur - beg),
                                                      (size_t)(end - beg)),
                                       slice_out))) {
             return error;
           }
           p->frame_size -= remaining;
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           return GRPC_ERROR_NONE;
         } else {
           GPR_ASSERT(remaining > p->frame_size);
           s->stats.incoming.data_bytes += p->frame_size;
           if (GRPC_ERROR_NONE !=
               (grpc_chttp2_incoming_byte_stream_push(
-                  exec_ctx, p->parsing_frame,
+                  p->parsing_frame,
                   grpc_slice_sub(slice, (size_t)(cur - beg),
                                  (size_t)(cur + p->frame_size - beg)),
                   slice_out))) {
-            grpc_slice_unref_internal(exec_ctx, slice);
+            grpc_slice_unref_internal(slice);
             return error;
           }
           if (GRPC_ERROR_NONE !=
               (error = grpc_chttp2_incoming_byte_stream_finished(
-                   exec_ctx, p->parsing_frame, GRPC_ERROR_NONE, true))) {
-            grpc_slice_unref_internal(exec_ctx, slice);
+                   p->parsing_frame, GRPC_ERROR_NONE, true))) {
+            grpc_slice_unref_internal(slice);
             return error;
           }
           p->parsing_frame = nullptr;
@@ -279,7 +278,7 @@
           grpc_slice_buffer_undo_take_first(
               slices,
               grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
-          grpc_slice_unref_internal(exec_ctx, slice);
+          grpc_slice_unref_internal(slice);
           return GRPC_ERROR_NONE;
         }
       }
@@ -289,19 +288,19 @@
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_data_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
+grpc_error* grpc_chttp2_data_parser_parse(void* parser,
                                           grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s,
                                           grpc_slice slice, int is_last) {
   if (!s->pending_byte_stream) {
     grpc_slice_ref_internal(slice);
     grpc_slice_buffer_add(&s->frame_storage, slice);
-    grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s);
+    grpc_chttp2_maybe_complete_recv_message(t, s);
   } else if (s->on_next) {
     GPR_ASSERT(s->frame_storage.length == 0);
     grpc_slice_ref_internal(slice);
     grpc_slice_buffer_add(&s->unprocessed_incoming_frames_buffer, slice);
-    GRPC_CLOSURE_SCHED(exec_ctx, s->on_next, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->on_next, GRPC_ERROR_NONE);
     s->on_next = nullptr;
     s->unprocessed_incoming_frames_decompressed = false;
   } else {
@@ -310,8 +309,7 @@
   }
 
   if (is_last && s->received_last_frame) {
-    grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, false,
-                                   GRPC_ERROR_NONE);
+    grpc_chttp2_mark_stream_closed(t, s, true, false, GRPC_ERROR_NONE);
   }
 
   return GRPC_ERROR_NONE;
diff --git a/src/core/ext/transport/chttp2/transport/frame_data.h b/src/core/ext/transport/chttp2/transport/frame_data.h
index 4de553e..964cc59 100644
--- a/src/core/ext/transport/chttp2/transport/frame_data.h
+++ b/src/core/ext/transport/chttp2/transport/frame_data.h
@@ -54,8 +54,7 @@
 /* initialize per-stream state for data frame parsing */
 grpc_error* grpc_chttp2_data_parser_init(grpc_chttp2_data_parser* parser);
 
-void grpc_chttp2_data_parser_destroy(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_data_parser* parser);
+void grpc_chttp2_data_parser_destroy(grpc_chttp2_data_parser* parser);
 
 /* start processing a new data frame */
 grpc_error* grpc_chttp2_data_parser_begin_frame(grpc_chttp2_data_parser* parser,
@@ -65,7 +64,7 @@
 
 /* handle a slice of a data frame - is_last indicates the last slice of a
    frame */
-grpc_error* grpc_chttp2_data_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
+grpc_error* grpc_chttp2_data_parser_parse(void* parser,
                                           grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s,
                                           grpc_slice slice, int is_last);
@@ -76,7 +75,7 @@
                              grpc_slice_buffer* outbuf);
 
 grpc_error* grpc_deframe_unprocessed_incoming_frames(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_data_parser* p, grpc_chttp2_stream* s,
+    grpc_chttp2_data_parser* p, grpc_chttp2_stream* s,
     grpc_slice_buffer* slices, grpc_slice* slice_out,
     grpc_byte_stream** stream_out);
 
diff --git a/src/core/ext/transport/chttp2/transport/frame_goaway.cc b/src/core/ext/transport/chttp2/transport/frame_goaway.cc
index a2ce709..b60b422 100644
--- a/src/core/ext/transport/chttp2/transport/frame_goaway.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.cc
@@ -52,8 +52,7 @@
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_goaway_parser_parse(grpc_exec_ctx* exec_ctx,
-                                            void* parser,
+grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
                                             grpc_chttp2_transport* t,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last) {
@@ -135,7 +134,7 @@
       p->state = GRPC_CHTTP2_GOAWAY_DEBUG;
       if (is_last) {
         grpc_chttp2_add_incoming_goaway(
-            exec_ctx, t, (uint32_t)p->error_code,
+            t, (uint32_t)p->error_code,
             grpc_slice_new(p->debug_data, p->debug_length, gpr_free));
         p->debug_data = nullptr;
       }
diff --git a/src/core/ext/transport/chttp2/transport/frame_goaway.h b/src/core/ext/transport/chttp2/transport/frame_goaway.h
index 743e763..064d39a 100644
--- a/src/core/ext/transport/chttp2/transport/frame_goaway.h
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.h
@@ -50,8 +50,7 @@
 void grpc_chttp2_goaway_parser_destroy(grpc_chttp2_goaway_parser* p);
 grpc_error* grpc_chttp2_goaway_parser_begin_frame(
     grpc_chttp2_goaway_parser* parser, uint32_t length, uint8_t flags);
-grpc_error* grpc_chttp2_goaway_parser_parse(grpc_exec_ctx* exec_ctx,
-                                            void* parser,
+grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
                                             grpc_chttp2_transport* t,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/frame_ping.cc b/src/core/ext/transport/chttp2/transport/frame_ping.cc
index d0feb51..298a567 100644
--- a/src/core/ext/transport/chttp2/transport/frame_ping.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.cc
@@ -68,7 +68,7 @@
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_ping_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
+grpc_error* grpc_chttp2_ping_parser_parse(void* parser,
                                           grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s,
                                           grpc_slice slice, int is_last) {
@@ -86,10 +86,10 @@
   if (p->byte == 8) {
     GPR_ASSERT(is_last);
     if (p->is_ack) {
-      grpc_chttp2_ack_ping(exec_ctx, t, p->opaque_8bytes);
+      grpc_chttp2_ack_ping(t, p->opaque_8bytes);
     } else {
       if (!t->is_client) {
-        grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+        grpc_millis now = grpc_core::ExecCtx::Get()->Now();
         grpc_millis next_allowed_ping =
             t->ping_recv_state.last_ping_recv_time +
             t->ping_policy.min_recv_ping_interval_without_data;
@@ -104,7 +104,7 @@
         }
 
         if (next_allowed_ping > now) {
-          grpc_chttp2_add_ping_strike(exec_ctx, t);
+          grpc_chttp2_add_ping_strike(t);
         }
 
         t->ping_recv_state.last_ping_recv_time = now;
@@ -116,8 +116,7 @@
               t->ping_acks, t->ping_ack_capacity * sizeof(*t->ping_acks));
         }
         t->ping_acks[t->ping_ack_count++] = p->opaque_8bytes;
-        grpc_chttp2_initiate_write(exec_ctx, t,
-                                   GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE);
+        grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE);
       }
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/frame_ping.h b/src/core/ext/transport/chttp2/transport/frame_ping.h
index 76ca397..75bacfb 100644
--- a/src/core/ext/transport/chttp2/transport/frame_ping.h
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.h
@@ -33,7 +33,7 @@
 
 grpc_error* grpc_chttp2_ping_parser_begin_frame(grpc_chttp2_ping_parser* parser,
                                                 uint32_t length, uint8_t flags);
-grpc_error* grpc_chttp2_ping_parser_parse(grpc_exec_ctx* exec_ctx, void* parser,
+grpc_error* grpc_chttp2_ping_parser_parse(void* parser,
                                           grpc_chttp2_transport* t,
                                           grpc_chttp2_stream* s,
                                           grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc b/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
index 05a7f05..fee5766 100644
--- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
@@ -69,8 +69,7 @@
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx* exec_ctx,
-                                                void* parser,
+grpc_error* grpc_chttp2_rst_stream_parser_parse(void* parser,
                                                 grpc_chttp2_transport* t,
                                                 grpc_chttp2_stream* s,
                                                 grpc_slice slice, int is_last) {
@@ -103,7 +102,7 @@
           GRPC_ERROR_INT_HTTP2_ERROR, (intptr_t)reason);
       gpr_free(message);
     }
-    grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, true, error);
+    grpc_chttp2_mark_stream_closed(t, s, true, true, error);
   }
 
   return GRPC_ERROR_NONE;
diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.h b/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
index 7dfc5d4..e76a3ca 100644
--- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
@@ -34,8 +34,7 @@
 
 grpc_error* grpc_chttp2_rst_stream_parser_begin_frame(
     grpc_chttp2_rst_stream_parser* parser, uint32_t length, uint8_t flags);
-grpc_error* grpc_chttp2_rst_stream_parser_parse(grpc_exec_ctx* exec_ctx,
-                                                void* parser,
+grpc_error* grpc_chttp2_rst_stream_parser_parse(void* parser,
                                                 grpc_chttp2_transport* t,
                                                 grpc_chttp2_stream* s,
                                                 grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/frame_settings.cc b/src/core/ext/transport/chttp2/transport/frame_settings.cc
index 75bb78d..c6c2a6c 100644
--- a/src/core/ext/transport/chttp2/transport/frame_settings.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.cc
@@ -108,8 +108,7 @@
   }
 }
 
-grpc_error* grpc_chttp2_settings_parser_parse(grpc_exec_ctx* exec_ctx, void* p,
-                                              grpc_chttp2_transport* t,
+grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
                                               grpc_chttp2_stream* s,
                                               grpc_slice slice, int is_last) {
   grpc_chttp2_settings_parser* parser = (grpc_chttp2_settings_parser*)p;
@@ -131,6 +130,11 @@
             memcpy(parser->target_settings, parser->incoming_settings,
                    GRPC_CHTTP2_NUM_SETTINGS * sizeof(uint32_t));
             grpc_slice_buffer_add(&t->qbuf, grpc_chttp2_settings_ack_create());
+            if (t->notify_on_receive_settings != nullptr) {
+              GRPC_CLOSURE_SCHED(t->notify_on_receive_settings,
+                                 GRPC_ERROR_NONE);
+              t->notify_on_receive_settings = nullptr;
+            }
           }
           return GRPC_ERROR_NONE;
         }
diff --git a/src/core/ext/transport/chttp2/transport/frame_settings.h b/src/core/ext/transport/chttp2/transport/frame_settings.h
index 36e2ca8..ce65402 100644
--- a/src/core/ext/transport/chttp2/transport/frame_settings.h
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.h
@@ -52,8 +52,7 @@
 grpc_error* grpc_chttp2_settings_parser_begin_frame(
     grpc_chttp2_settings_parser* parser, uint32_t length, uint8_t flags,
     uint32_t* settings);
-grpc_error* grpc_chttp2_settings_parser_parse(grpc_exec_ctx* exec_ctx,
-                                              void* parser,
+grpc_error* grpc_chttp2_settings_parser_parse(void* parser,
                                               grpc_chttp2_transport* t,
                                               grpc_chttp2_stream* s,
                                               grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/frame_window_update.cc b/src/core/ext/transport/chttp2/transport/frame_window_update.cc
index 08407a8..418ca14 100644
--- a/src/core/ext/transport/chttp2/transport/frame_window_update.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.cc
@@ -64,9 +64,11 @@
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_window_update_parser_parse(
-    grpc_exec_ctx* exec_ctx, void* parser, grpc_chttp2_transport* t,
-    grpc_chttp2_stream* s, grpc_slice slice, int is_last) {
+grpc_error* grpc_chttp2_window_update_parser_parse(void* parser,
+                                                   grpc_chttp2_transport* t,
+                                                   grpc_chttp2_stream* s,
+                                                   grpc_slice slice,
+                                                   int is_last) {
   uint8_t* const beg = GRPC_SLICE_START_PTR(slice);
   uint8_t* const end = GRPC_SLICE_END_PTR(slice);
   uint8_t* cur = beg;
@@ -98,10 +100,9 @@
       if (s != nullptr) {
         s->flow_control->RecvUpdate(received_update);
         if (grpc_chttp2_list_remove_stalled_by_stream(t, s)) {
-          grpc_chttp2_mark_stream_writable(exec_ctx, t, s);
+          grpc_chttp2_mark_stream_writable(t, s);
           grpc_chttp2_initiate_write(
-              exec_ctx, t,
-              GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE);
+              t, GRPC_CHTTP2_INITIATE_WRITE_FLOW_CONTROL_UNSTALLED_BY_UPDATE);
         }
       }
     } else {
@@ -110,8 +111,7 @@
       bool is_zero = t->flow_control->remote_window() <= 0;
       if (was_zero && !is_zero) {
         grpc_chttp2_initiate_write(
-            exec_ctx, t,
-            GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED);
+            t, GRPC_CHTTP2_INITIATE_WRITE_TRANSPORT_FLOW_CONTROL_UNSTALLED);
       }
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/frame_window_update.h b/src/core/ext/transport/chttp2/transport/frame_window_update.h
index e031b58..a32f1a9 100644
--- a/src/core/ext/transport/chttp2/transport/frame_window_update.h
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.h
@@ -35,8 +35,10 @@
 
 grpc_error* grpc_chttp2_window_update_parser_begin_frame(
     grpc_chttp2_window_update_parser* parser, uint32_t length, uint8_t flags);
-grpc_error* grpc_chttp2_window_update_parser_parse(
-    grpc_exec_ctx* exec_ctx, void* parser, grpc_chttp2_transport* t,
-    grpc_chttp2_stream* s, grpc_slice slice, int is_last);
+grpc_error* grpc_chttp2_window_update_parser_parse(void* parser,
+                                                   grpc_chttp2_transport* t,
+                                                   grpc_chttp2_stream* s,
+                                                   grpc_slice slice,
+                                                   int is_last);
 
 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_WINDOW_UPDATE_H */
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.cc b/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
index e76d92e..3a5692a 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
@@ -206,14 +206,12 @@
 }
 
 /* dummy function */
-static void add_nothing(grpc_exec_ctx* exec_ctx,
-                        grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
+static void add_nothing(grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
                         size_t elem_size) {}
 
 // Add a key to the dynamic table. Both key and value will be added to table at
 // the decoder.
-static void add_key_with_index(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_compressor* c,
+static void add_key_with_index(grpc_chttp2_hpack_compressor* c,
                                grpc_mdelem elem, uint32_t new_index) {
   if (new_index == 0) {
     return;
@@ -240,14 +238,12 @@
     c->indices_keys[HASH_FRAGMENT_3(key_hash)] = new_index;
   } else if (c->indices_keys[HASH_FRAGMENT_2(key_hash)] <
              c->indices_keys[HASH_FRAGMENT_3(key_hash)]) {
-    grpc_slice_unref_internal(exec_ctx,
-                              c->entries_keys[HASH_FRAGMENT_2(key_hash)]);
+    grpc_slice_unref_internal(c->entries_keys[HASH_FRAGMENT_2(key_hash)]);
     c->entries_keys[HASH_FRAGMENT_2(key_hash)] =
         grpc_slice_ref_internal(GRPC_MDKEY(elem));
     c->indices_keys[HASH_FRAGMENT_2(key_hash)] = new_index;
   } else {
-    grpc_slice_unref_internal(exec_ctx,
-                              c->entries_keys[HASH_FRAGMENT_3(key_hash)]);
+    grpc_slice_unref_internal(c->entries_keys[HASH_FRAGMENT_3(key_hash)]);
     c->entries_keys[HASH_FRAGMENT_3(key_hash)] =
         grpc_slice_ref_internal(GRPC_MDKEY(elem));
     c->indices_keys[HASH_FRAGMENT_3(key_hash)] = new_index;
@@ -255,8 +251,7 @@
 }
 
 /* add an element to the decoder table */
-static void add_elem_with_index(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_compressor* c,
+static void add_elem_with_index(grpc_chttp2_hpack_compressor* c,
                                 grpc_mdelem elem, uint32_t new_index) {
   if (new_index == 0) {
     return;
@@ -286,35 +281,34 @@
   } else if (c->indices_elems[HASH_FRAGMENT_2(elem_hash)] <
              c->indices_elems[HASH_FRAGMENT_3(elem_hash)]) {
     /* not there: replace oldest */
-    GRPC_MDELEM_UNREF(exec_ctx, c->entries_elems[HASH_FRAGMENT_2(elem_hash)]);
+    GRPC_MDELEM_UNREF(c->entries_elems[HASH_FRAGMENT_2(elem_hash)]);
     c->entries_elems[HASH_FRAGMENT_2(elem_hash)] = GRPC_MDELEM_REF(elem);
     c->indices_elems[HASH_FRAGMENT_2(elem_hash)] = new_index;
   } else {
     /* not there: replace oldest */
-    GRPC_MDELEM_UNREF(exec_ctx, c->entries_elems[HASH_FRAGMENT_3(elem_hash)]);
+    GRPC_MDELEM_UNREF(c->entries_elems[HASH_FRAGMENT_3(elem_hash)]);
     c->entries_elems[HASH_FRAGMENT_3(elem_hash)] = GRPC_MDELEM_REF(elem);
     c->indices_elems[HASH_FRAGMENT_3(elem_hash)] = new_index;
   }
 
-  add_key_with_index(exec_ctx, c, elem, new_index);
+  add_key_with_index(c, elem, new_index);
 }
 
-static void add_elem(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
-                     grpc_mdelem elem, size_t elem_size) {
+static void add_elem(grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
+                     size_t elem_size) {
   uint32_t new_index = prepare_space_for_new_elem(c, elem_size);
-  add_elem_with_index(exec_ctx, c, elem, new_index);
+  add_elem_with_index(c, elem, new_index);
 }
 
-static void add_key(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
-                    grpc_mdelem elem, size_t elem_size) {
+static void add_key(grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
+                    size_t elem_size) {
   uint32_t new_index = prepare_space_for_new_elem(c, elem_size);
-  add_key_with_index(exec_ctx, c, elem, new_index);
+  add_key_with_index(c, elem, new_index);
 }
 
-static void emit_indexed(grpc_exec_ctx* exec_ctx,
-                         grpc_chttp2_hpack_compressor* c, uint32_t elem_index,
+static void emit_indexed(grpc_chttp2_hpack_compressor* c, uint32_t elem_index,
                          framer_state* st) {
-  GRPC_STATS_INC_HPACK_SEND_INDEXED(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_INDEXED();
   uint32_t len = GRPC_CHTTP2_VARINT_LENGTH(elem_index, 1);
   GRPC_CHTTP2_WRITE_VARINT(elem_index, 1, 0x80, add_tiny_header_data(st, len),
                            len);
@@ -326,18 +320,17 @@
   bool insert_null_before_wire_value;
 } wire_value;
 
-static wire_value get_wire_value(grpc_exec_ctx* exec_ctx, grpc_mdelem elem,
-                                 bool true_binary_enabled) {
+static wire_value get_wire_value(grpc_mdelem elem, bool true_binary_enabled) {
   wire_value wire_val;
   if (grpc_is_binary_header(GRPC_MDKEY(elem))) {
     if (true_binary_enabled) {
-      GRPC_STATS_INC_HPACK_SEND_BINARY(exec_ctx);
+      GRPC_STATS_INC_HPACK_SEND_BINARY();
       wire_val.huffman_prefix = 0x00;
       wire_val.insert_null_before_wire_value = true;
       wire_val.data = grpc_slice_ref_internal(GRPC_MDVALUE(elem));
 
     } else {
-      GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64(exec_ctx);
+      GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64();
       wire_val.huffman_prefix = 0x80;
       wire_val.insert_null_before_wire_value = false;
       wire_val.data =
@@ -345,7 +338,7 @@
     }
   } else {
     /* TODO(ctiller): opportunistically compress non-binary headers */
-    GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
+    GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED();
     wire_val.huffman_prefix = 0x00;
     wire_val.insert_null_before_wire_value = false;
     wire_val.data = grpc_slice_ref_internal(GRPC_MDVALUE(elem));
@@ -362,14 +355,12 @@
   add_header_data(st, v.data);
 }
 
-static void emit_lithdr_incidx(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_compressor* c,
+static void emit_lithdr_incidx(grpc_chttp2_hpack_compressor* c,
                                uint32_t key_index, grpc_mdelem elem,
                                framer_state* st) {
-  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX();
   uint32_t len_pfx = GRPC_CHTTP2_VARINT_LENGTH(key_index, 2);
-  wire_value value =
-      get_wire_value(exec_ctx, elem, st->use_true_binary_metadata);
+  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
   size_t len_val = wire_value_length(value);
   uint32_t len_val_len;
   GPR_ASSERT(len_val <= UINT32_MAX);
@@ -381,14 +372,12 @@
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_noidx(grpc_exec_ctx* exec_ctx,
-                              grpc_chttp2_hpack_compressor* c,
+static void emit_lithdr_noidx(grpc_chttp2_hpack_compressor* c,
                               uint32_t key_index, grpc_mdelem elem,
                               framer_state* st) {
-  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX();
   uint32_t len_pfx = GRPC_CHTTP2_VARINT_LENGTH(key_index, 4);
-  wire_value value =
-      get_wire_value(exec_ctx, elem, st->use_true_binary_metadata);
+  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
   size_t len_val = wire_value_length(value);
   uint32_t len_val_len;
   GPR_ASSERT(len_val <= UINT32_MAX);
@@ -400,16 +389,14 @@
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_hpack_compressor* c,
+static void emit_lithdr_incidx_v(grpc_chttp2_hpack_compressor* c,
                                  uint32_t unused_index, grpc_mdelem elem,
                                  framer_state* st) {
   GPR_ASSERT(unused_index == 0);
-  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V(exec_ctx);
-  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V();
+  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED();
   uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
-  wire_value value =
-      get_wire_value(exec_ctx, elem, st->use_true_binary_metadata);
+  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
   uint32_t len_val = (uint32_t)wire_value_length(value);
   uint32_t len_key_len = GRPC_CHTTP2_VARINT_LENGTH(len_key, 1);
   uint32_t len_val_len = GRPC_CHTTP2_VARINT_LENGTH(len_val, 1);
@@ -424,16 +411,14 @@
   add_wire_value(st, value);
 }
 
-static void emit_lithdr_noidx_v(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_compressor* c,
+static void emit_lithdr_noidx_v(grpc_chttp2_hpack_compressor* c,
                                 uint32_t unused_index, grpc_mdelem elem,
                                 framer_state* st) {
   GPR_ASSERT(unused_index == 0);
-  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V(exec_ctx);
-  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx);
+  GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V();
+  GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED();
   uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
-  wire_value value =
-      get_wire_value(exec_ctx, elem, st->use_true_binary_metadata);
+  wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
   uint32_t len_val = (uint32_t)wire_value_length(value);
   uint32_t len_key_len = GRPC_CHTTP2_VARINT_LENGTH(len_key, 1);
   uint32_t len_val_len = GRPC_CHTTP2_VARINT_LENGTH(len_val, 1);
@@ -462,8 +447,8 @@
 }
 
 /* encode an mdelem */
-static void hpack_enc(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_compressor* c,
-                      grpc_mdelem elem, framer_state* st) {
+static void hpack_enc(grpc_chttp2_hpack_compressor* c, grpc_mdelem elem,
+                      framer_state* st) {
   GPR_ASSERT(GRPC_SLICE_LENGTH(GRPC_MDKEY(elem)) > 0);
   if (GRPC_SLICE_START_PTR(GRPC_MDKEY(elem))[0] != ':') { /* regular header */
     st->seen_regular_header = 1;
@@ -496,7 +481,7 @@
 
   // Key is not interned, emit literals.
   if (!key_interned) {
-    emit_lithdr_noidx_v(exec_ctx, c, 0, elem, st);
+    emit_lithdr_noidx_v(c, 0, elem, st);
     return;
   }
 
@@ -515,16 +500,16 @@
     if (grpc_mdelem_eq(c->entries_elems[HASH_FRAGMENT_2(elem_hash)], elem) &&
         c->indices_elems[HASH_FRAGMENT_2(elem_hash)] > c->tail_remote_index) {
       /* HIT: complete element (first cuckoo hash) */
-      emit_indexed(exec_ctx, c,
-                   dynidx(c, c->indices_elems[HASH_FRAGMENT_2(elem_hash)]), st);
+      emit_indexed(c, dynidx(c, c->indices_elems[HASH_FRAGMENT_2(elem_hash)]),
+                   st);
       return;
     }
 
     if (grpc_mdelem_eq(c->entries_elems[HASH_FRAGMENT_3(elem_hash)], elem) &&
         c->indices_elems[HASH_FRAGMENT_3(elem_hash)] > c->tail_remote_index) {
       /* HIT: complete element (second cuckoo hash) */
-      emit_indexed(exec_ctx, c,
-                   dynidx(c, c->indices_elems[HASH_FRAGMENT_3(elem_hash)]), st);
+      emit_indexed(c, dynidx(c, c->indices_elems[HASH_FRAGMENT_3(elem_hash)]),
+                   st);
       return;
     }
   }
@@ -538,10 +523,10 @@
                          decoder_space_usage < MAX_DECODER_SPACE_USAGE &&
                          c->filter_elems[HASH_FRAGMENT_1(elem_hash)] >=
                              c->filter_elems_sum / ONE_ON_ADD_PROBABILITY;
-  void (*maybe_add)(grpc_exec_ctx*, grpc_chttp2_hpack_compressor*, grpc_mdelem,
-                    size_t) = should_add_elem ? add_elem : add_nothing;
-  void (*emit)(grpc_exec_ctx*, grpc_chttp2_hpack_compressor*, uint32_t,
-               grpc_mdelem, framer_state*) =
+  void (*maybe_add)(grpc_chttp2_hpack_compressor*, grpc_mdelem, size_t) =
+      should_add_elem ? add_elem : add_nothing;
+  void (*emit)(grpc_chttp2_hpack_compressor*, uint32_t, grpc_mdelem,
+               framer_state*) =
       should_add_elem ? emit_lithdr_incidx : emit_lithdr_noidx;
 
   /* no hits for the elem... maybe there's a key? */
@@ -550,8 +535,8 @@
                     GRPC_MDKEY(elem)) &&
       indices_key > c->tail_remote_index) {
     /* HIT: key (first cuckoo hash) */
-    emit(exec_ctx, c, dynidx(c, indices_key), elem, st);
-    maybe_add(exec_ctx, c, elem, decoder_space_usage);
+    emit(c, dynidx(c, indices_key), elem, st);
+    maybe_add(c, elem, decoder_space_usage);
     return;
   }
 
@@ -560,8 +545,8 @@
                     GRPC_MDKEY(elem)) &&
       indices_key > c->tail_remote_index) {
     /* HIT: key (first cuckoo hash) */
-    emit(exec_ctx, c, dynidx(c, indices_key), elem, st);
-    maybe_add(exec_ctx, c, elem, decoder_space_usage);
+    emit(c, dynidx(c, indices_key), elem, st);
+    maybe_add(c, elem, decoder_space_usage);
     return;
   }
 
@@ -572,24 +557,23 @@
                                              : emit_lithdr_noidx_v;
   maybe_add =
       should_add_elem ? add_elem : (should_add_key ? add_key : add_nothing);
-  emit(exec_ctx, c, 0, elem, st);
-  maybe_add(exec_ctx, c, elem, decoder_space_usage);
+  emit(c, 0, elem, st);
+  maybe_add(c, elem, decoder_space_usage);
 }
 
 #define STRLEN_LIT(x) (sizeof(x) - 1)
 #define TIMEOUT_KEY "grpc-timeout"
 
-static void deadline_enc(grpc_exec_ctx* exec_ctx,
-                         grpc_chttp2_hpack_compressor* c, grpc_millis deadline,
+static void deadline_enc(grpc_chttp2_hpack_compressor* c, grpc_millis deadline,
                          framer_state* st) {
   char timeout_str[GRPC_HTTP2_TIMEOUT_ENCODE_MIN_BUFSIZE];
   grpc_mdelem mdelem;
-  grpc_http2_encode_timeout(deadline - grpc_exec_ctx_now(exec_ctx),
+  grpc_http2_encode_timeout(deadline - grpc_core::ExecCtx::Get()->Now(),
                             timeout_str);
-  mdelem = grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_GRPC_TIMEOUT,
+  mdelem = grpc_mdelem_from_slices(GRPC_MDSTR_GRPC_TIMEOUT,
                                    grpc_slice_from_copied_string(timeout_str));
-  hpack_enc(exec_ctx, c, mdelem, st);
-  GRPC_MDELEM_UNREF(exec_ctx, mdelem);
+  hpack_enc(c, mdelem, st);
+  GRPC_MDELEM_UNREF(mdelem);
 }
 
 static uint32_t elems_for_bytes(uint32_t bytes) { return (bytes + 31) / 32; }
@@ -609,14 +593,13 @@
   }
 }
 
-void grpc_chttp2_hpack_compressor_destroy(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_compressor* c) {
+void grpc_chttp2_hpack_compressor_destroy(grpc_chttp2_hpack_compressor* c) {
   int i;
   for (i = 0; i < GRPC_CHTTP2_HPACKC_NUM_VALUES; i++) {
     if (c->entries_keys[i].refcount != &terminal_slice_refcount) {
-      grpc_slice_unref_internal(exec_ctx, c->entries_keys[i]);
+      grpc_slice_unref_internal(c->entries_keys[i]);
     }
-    GRPC_MDELEM_UNREF(exec_ctx, c->entries_elems[i]);
+    GRPC_MDELEM_UNREF(c->entries_elems[i]);
   }
   gpr_free(c->table_elem_size);
 }
@@ -672,8 +655,7 @@
   }
 }
 
-void grpc_chttp2_encode_header(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_compressor* c,
+void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor* c,
                                grpc_mdelem** extra_headers,
                                size_t extra_headers_size,
                                grpc_metadata_batch* metadata,
@@ -699,15 +681,15 @@
     emit_advertise_table_size_change(c, &st);
   }
   for (size_t i = 0; i < extra_headers_size; ++i) {
-    hpack_enc(exec_ctx, c, *extra_headers[i], &st);
+    hpack_enc(c, *extra_headers[i], &st);
   }
   grpc_metadata_batch_assert_ok(metadata);
   for (grpc_linked_mdelem* l = metadata->list.head; l; l = l->next) {
-    hpack_enc(exec_ctx, c, l->md, &st);
+    hpack_enc(c, l->md, &st);
   }
   grpc_millis deadline = metadata->deadline;
   if (deadline != GRPC_MILLIS_INF_FUTURE) {
-    deadline_enc(exec_ctx, c, deadline, &st);
+    deadline_enc(c, deadline, &st);
   }
 
   finish_frame(&st, 1, options->is_eof);
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.h b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
index 08921b1..a26514c 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
@@ -70,8 +70,7 @@
 } grpc_chttp2_hpack_compressor;
 
 void grpc_chttp2_hpack_compressor_init(grpc_chttp2_hpack_compressor* c);
-void grpc_chttp2_hpack_compressor_destroy(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_compressor* c);
+void grpc_chttp2_hpack_compressor_destroy(grpc_chttp2_hpack_compressor* c);
 void grpc_chttp2_hpack_compressor_set_max_table_size(
     grpc_chttp2_hpack_compressor* c, uint32_t max_table_size);
 void grpc_chttp2_hpack_compressor_set_max_usable_size(
@@ -85,8 +84,7 @@
   grpc_transport_one_way_stats* stats;
 } grpc_encode_header_options;
 
-void grpc_chttp2_encode_header(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_compressor* c,
+void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor* c,
                                grpc_mdelem** extra_headers,
                                size_t extra_headers_size,
                                grpc_metadata_batch* metadata,
diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.cc b/src/core/ext/transport/chttp2/transport/hpack_parser.cc
index 18cb27f..a395ab2 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.cc
@@ -61,96 +61,69 @@
    a set of indirect jumps, and so not waste stack space. */
 
 /* forward declarations for parsing states */
-static grpc_error* parse_begin(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_begin(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                const uint8_t* end);
-static grpc_error* parse_error(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_error(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                const uint8_t* end, grpc_error* error);
-static grpc_error* still_parse_error(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* still_parse_error(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_illegal_op(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_illegal_op(grpc_chttp2_hpack_parser* p,
                                     const uint8_t* cur, const uint8_t* end);
 
-static grpc_error* parse_string_prefix(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_string_prefix(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_key_string(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_key_string(grpc_chttp2_hpack_parser* p,
                                     const uint8_t* cur, const uint8_t* end);
 static grpc_error* parse_value_string_with_indexed_key(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* cur,
-    const uint8_t* end);
+    grpc_chttp2_hpack_parser* p, const uint8_t* cur, const uint8_t* end);
 static grpc_error* parse_value_string_with_literal_key(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* cur,
-    const uint8_t* end);
+    grpc_chttp2_hpack_parser* p, const uint8_t* cur, const uint8_t* end);
 
-static grpc_error* parse_value0(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value0(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value1(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value1(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value2(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value2(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value3(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value3(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value4(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value4(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end);
-static grpc_error* parse_value5up(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_value5up(grpc_chttp2_hpack_parser* p,
                                   const uint8_t* cur, const uint8_t* end);
 
-static grpc_error* parse_indexed_field(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_indexed_field(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_indexed_field_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_indexed_field_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_incidx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_lithdr_incidx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_notidx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_lithdr_notidx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_notidx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_nvridx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_lithdr_nvridx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_lithdr_nvridx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end);
-static grpc_error* parse_max_tbl_size(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_max_tbl_size(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end);
-static grpc_error* parse_max_tbl_size_x(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_max_tbl_size_x(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur, const uint8_t* end);
 
 /* we translate the first byte of a hpack field into one of these decoding
@@ -649,8 +622,8 @@
 };
 
 /* emission helpers */
-static grpc_error* on_hdr(grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p,
-                          grpc_mdelem md, int add_to_table) {
+static grpc_error* on_hdr(grpc_chttp2_hpack_parser* p, grpc_mdelem md,
+                          int add_to_table) {
   if (grpc_http_trace.enabled()) {
     char* k = grpc_slice_to_c_string(GRPC_MDKEY(md));
     char* v = nullptr;
@@ -671,26 +644,25 @@
   if (add_to_table) {
     GPR_ASSERT(GRPC_MDELEM_STORAGE(md) == GRPC_MDELEM_STORAGE_INTERNED ||
                GRPC_MDELEM_STORAGE(md) == GRPC_MDELEM_STORAGE_STATIC);
-    grpc_error* err = grpc_chttp2_hptbl_add(exec_ctx, &p->table, md);
+    grpc_error* err = grpc_chttp2_hptbl_add(&p->table, md);
     if (err != GRPC_ERROR_NONE) return err;
   }
   if (p->on_header == nullptr) {
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING("on_header callback not set");
   }
-  p->on_header(exec_ctx, p->on_header_user_data, md);
+  p->on_header(p->on_header_user_data, md);
   return GRPC_ERROR_NONE;
 }
 
-static grpc_slice take_string(grpc_exec_ctx* exec_ctx,
-                              grpc_chttp2_hpack_parser* p,
+static grpc_slice take_string(grpc_chttp2_hpack_parser* p,
                               grpc_chttp2_hpack_parser_string* str,
                               bool intern) {
   grpc_slice s;
   if (!str->copied) {
     if (intern) {
       s = grpc_slice_intern(str->data.referenced);
-      grpc_slice_unref_internal(exec_ctx, str->data.referenced);
+      grpc_slice_unref_internal(str->data.referenced);
     } else {
       s = str->data.referenced;
     }
@@ -708,85 +680,77 @@
 }
 
 /* jump to the next state */
-static grpc_error* parse_next(grpc_exec_ctx* exec_ctx,
-                              grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_next(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                               const uint8_t* end) {
   p->state = *p->next_state++;
-  return p->state(exec_ctx, p, cur, end);
+  return p->state(p, cur, end);
 }
 
 /* begin parsing a header: all functionality is encoded into lookup tables
    above */
-static grpc_error* parse_begin(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_begin(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                const uint8_t* end) {
   if (cur == end) {
     p->state = parse_begin;
     return GRPC_ERROR_NONE;
   }
 
-  return first_byte_action[first_byte_lut[*cur]](exec_ctx, p, cur, end);
+  return first_byte_action[first_byte_lut[*cur]](p, cur, end);
 }
 
 /* stream dependency and prioritization data: we just skip it */
-static grpc_error* parse_stream_weight(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_weight(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_weight;
     return GRPC_ERROR_NONE;
   }
 
-  return p->after_prioritization(exec_ctx, p, cur + 1, end);
+  return p->after_prioritization(p, cur + 1, end);
 }
 
-static grpc_error* parse_stream_dep3(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_dep3(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_dep3;
     return GRPC_ERROR_NONE;
   }
 
-  return parse_stream_weight(exec_ctx, p, cur + 1, end);
+  return parse_stream_weight(p, cur + 1, end);
 }
 
-static grpc_error* parse_stream_dep2(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_dep2(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_dep2;
     return GRPC_ERROR_NONE;
   }
 
-  return parse_stream_dep3(exec_ctx, p, cur + 1, end);
+  return parse_stream_dep3(p, cur + 1, end);
 }
 
-static grpc_error* parse_stream_dep1(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_dep1(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_dep1;
     return GRPC_ERROR_NONE;
   }
 
-  return parse_stream_dep2(exec_ctx, p, cur + 1, end);
+  return parse_stream_dep2(p, cur + 1, end);
 }
 
-static grpc_error* parse_stream_dep0(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_stream_dep0(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_stream_dep0;
     return GRPC_ERROR_NONE;
   }
 
-  return parse_stream_dep1(exec_ctx, p, cur + 1, end);
+  return parse_stream_dep1(p, cur + 1, end);
 }
 
 /* emit an indexed field; jumps to begin the next field on completion */
-static grpc_error* finish_indexed_field(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_indexed_field(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   grpc_mdelem md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
@@ -798,24 +762,22 @@
         GRPC_ERROR_INT_SIZE, (intptr_t)p->table.num_ents);
   }
   GRPC_MDELEM_REF(md);
-  GRPC_STATS_INC_HPACK_RECV_INDEXED(exec_ctx);
-  grpc_error* err = on_hdr(exec_ctx, p, md, 0);
+  GRPC_STATS_INC_HPACK_RECV_INDEXED();
+  grpc_error* err = on_hdr(p, md, 0);
   if (err != GRPC_ERROR_NONE) return err;
-  return parse_begin(exec_ctx, p, cur, end);
+  return parse_begin(p, cur, end);
 }
 
 /* parse an indexed field with index < 127 */
-static grpc_error* parse_indexed_field(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_indexed_field(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   p->dynamic_table_update_allowed = 0;
   p->index = (*cur) & 0x7f;
-  return finish_indexed_field(exec_ctx, p, cur + 1, end);
+  return finish_indexed_field(p, cur + 1, end);
 }
 
 /* parse an indexed field with index >= 127 */
-static grpc_error* parse_indexed_field_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_indexed_field_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -824,56 +786,52 @@
   p->next_state = and_then;
   p->index = 0x7f;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* finish a literal header with incremental indexing */
-static grpc_error* finish_lithdr_incidx(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_incidx(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   grpc_mdelem md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   GPR_ASSERT(!GRPC_MDISNULL(md)); /* handled in string parsing */
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(md)),
-                              take_string(exec_ctx, p, &p->value, true)),
-      1);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(grpc_slice_ref_internal(GRPC_MDKEY(md)),
+                                     take_string(p, &p->value, true)),
+             1);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* finish a literal header with incremental indexing with no index */
-static grpc_error* finish_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_incidx_v(grpc_chttp2_hpack_parser* p,
                                           const uint8_t* cur,
                                           const uint8_t* end) {
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX_V(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, take_string(exec_ctx, p, &p->key, true),
-                              take_string(exec_ctx, p, &p->value, true)),
-      1);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX_V();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(take_string(p, &p->key, true),
+                                     take_string(p, &p->value, true)),
+             1);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* parse a literal header with incremental indexing; index < 63 */
-static grpc_error* parse_lithdr_incidx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_incidx};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0x3f;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* parse a literal header with incremental indexing; index >= 63 */
-static grpc_error* parse_lithdr_incidx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -883,12 +841,11 @@
   p->next_state = and_then;
   p->index = 0x3f;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* parse a literal header with incremental indexing; index = 0 */
-static grpc_error* parse_lithdr_incidx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_incidx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -896,56 +853,52 @@
       parse_value_string_with_literal_key, finish_lithdr_incidx_v};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* finish a literal header without incremental indexing */
-static grpc_error* finish_lithdr_notidx(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_notidx(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   grpc_mdelem md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   GPR_ASSERT(!GRPC_MDISNULL(md)); /* handled in string parsing */
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(md)),
-                              take_string(exec_ctx, p, &p->value, false)),
-      0);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(grpc_slice_ref_internal(GRPC_MDKEY(md)),
+                                     take_string(p, &p->value, false)),
+             0);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* finish a literal header without incremental indexing with index = 0 */
-static grpc_error* finish_lithdr_notidx_v(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_notidx_v(grpc_chttp2_hpack_parser* p,
                                           const uint8_t* cur,
                                           const uint8_t* end) {
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX_V(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, take_string(exec_ctx, p, &p->key, true),
-                              take_string(exec_ctx, p, &p->value, false)),
-      0);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX_V();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(take_string(p, &p->key, true),
+                                     take_string(p, &p->value, false)),
+             0);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* parse a literal header without incremental indexing; index < 15 */
-static grpc_error* parse_lithdr_notidx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_notidx};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0xf;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* parse a literal header without incremental indexing; index >= 15 */
-static grpc_error* parse_lithdr_notidx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -955,12 +908,11 @@
   p->next_state = and_then;
   p->index = 0xf;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* parse a literal header without incremental indexing; index == 0 */
-static grpc_error* parse_lithdr_notidx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_notidx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -968,56 +920,52 @@
       parse_value_string_with_literal_key, finish_lithdr_notidx_v};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* finish a literal header that is never indexed */
-static grpc_error* finish_lithdr_nvridx(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_nvridx(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   grpc_mdelem md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   GPR_ASSERT(!GRPC_MDISNULL(md)); /* handled in string parsing */
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(md)),
-                              take_string(exec_ctx, p, &p->value, false)),
-      0);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(grpc_slice_ref_internal(GRPC_MDKEY(md)),
+                                     take_string(p, &p->value, false)),
+             0);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* finish a literal header that is never indexed with an extra value */
-static grpc_error* finish_lithdr_nvridx_v(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_lithdr_nvridx_v(grpc_chttp2_hpack_parser* p,
                                           const uint8_t* cur,
                                           const uint8_t* end) {
-  GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX_V(exec_ctx);
-  grpc_error* err = on_hdr(
-      exec_ctx, p,
-      grpc_mdelem_from_slices(exec_ctx, take_string(exec_ctx, p, &p->key, true),
-                              take_string(exec_ctx, p, &p->value, false)),
-      0);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+  GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX_V();
+  grpc_error* err =
+      on_hdr(p,
+             grpc_mdelem_from_slices(take_string(p, &p->key, true),
+                                     take_string(p, &p->value, false)),
+             0);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* parse a literal header that is never indexed; index < 15 */
-static grpc_error* parse_lithdr_nvridx(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_nvridx};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0xf;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* parse a literal header that is never indexed; index >= 15 */
-static grpc_error* parse_lithdr_nvridx_x(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx_x(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -1027,12 +975,11 @@
   p->next_state = and_then;
   p->index = 0xf;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* parse a literal header that is never indexed; index == 0 */
-static grpc_error* parse_lithdr_nvridx_v(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser* p,
                                          const uint8_t* cur,
                                          const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
@@ -1040,47 +987,44 @@
       parse_value_string_with_literal_key, finish_lithdr_nvridx_v};
   p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
-  return parse_string_prefix(exec_ctx, p, cur + 1, end);
+  return parse_string_prefix(p, cur + 1, end);
 }
 
 /* finish parsing a max table size change */
-static grpc_error* finish_max_tbl_size(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* finish_max_tbl_size(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   if (grpc_http_trace.enabled()) {
     gpr_log(GPR_INFO, "MAX TABLE SIZE: %d", p->index);
   }
   grpc_error* err =
-      grpc_chttp2_hptbl_set_current_table_size(exec_ctx, &p->table, p->index);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_begin(exec_ctx, p, cur, end);
+      grpc_chttp2_hptbl_set_current_table_size(&p->table, p->index);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_begin(p, cur, end);
 }
 
 /* parse a max table size change, max size < 15 */
-static grpc_error* parse_max_tbl_size(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_max_tbl_size(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end) {
   if (p->dynamic_table_update_allowed == 0) {
     return parse_error(
-        exec_ctx, p, cur, end,
+        p, cur, end,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             "More than two max table size changes in a single frame"));
   }
   p->dynamic_table_update_allowed--;
   p->index = (*cur) & 0x1f;
-  return finish_max_tbl_size(exec_ctx, p, cur + 1, end);
+  return finish_max_tbl_size(p, cur + 1, end);
 }
 
 /* parse a max table size change, max size >= 15 */
-static grpc_error* parse_max_tbl_size_x(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_max_tbl_size_x(grpc_chttp2_hpack_parser* p,
                                         const uint8_t* cur,
                                         const uint8_t* end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       finish_max_tbl_size};
   if (p->dynamic_table_update_allowed == 0) {
     return parse_error(
-        exec_ctx, p, cur, end,
+        p, cur, end,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             "More than two max table size changes in a single frame"));
   }
@@ -1088,12 +1032,11 @@
   p->next_state = and_then;
   p->index = 0x1f;
   p->parsing.value = &p->index;
-  return parse_value0(exec_ctx, p, cur + 1, end);
+  return parse_value0(p, cur + 1, end);
 }
 
 /* a parse error: jam the parse state into parse_error, and return error */
-static grpc_error* parse_error(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_error(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                const uint8_t* end, grpc_error* err) {
   GPR_ASSERT(err != GRPC_ERROR_NONE);
   if (p->last_error == GRPC_ERROR_NONE) {
@@ -1103,27 +1046,24 @@
   return err;
 }
 
-static grpc_error* still_parse_error(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hpack_parser* p,
+static grpc_error* still_parse_error(grpc_chttp2_hpack_parser* p,
                                      const uint8_t* cur, const uint8_t* end) {
   return GRPC_ERROR_REF(p->last_error);
 }
 
-static grpc_error* parse_illegal_op(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_illegal_op(grpc_chttp2_hpack_parser* p,
                                     const uint8_t* cur, const uint8_t* end) {
   GPR_ASSERT(cur != end);
   char* msg;
   gpr_asprintf(&msg, "Illegal hpack op code %d", *cur);
   grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
   gpr_free(msg);
-  return parse_error(exec_ctx, p, cur, end, err);
+  return parse_error(p, cur, end, err);
 }
 
 /* parse the 1st byte of a varint into p->parsing.value
    no overflow is possible */
-static grpc_error* parse_value0(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value0(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   if (cur == end) {
     p->state = parse_value0;
@@ -1133,16 +1073,15 @@
   *p->parsing.value += (*cur) & 0x7f;
 
   if ((*cur) & 0x80) {
-    return parse_value1(exec_ctx, p, cur + 1, end);
+    return parse_value1(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
 /* parse the 2nd byte of a varint into p->parsing.value
    no overflow is possible */
-static grpc_error* parse_value1(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value1(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   if (cur == end) {
     p->state = parse_value1;
@@ -1152,16 +1091,15 @@
   *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 7;
 
   if ((*cur) & 0x80) {
-    return parse_value2(exec_ctx, p, cur + 1, end);
+    return parse_value2(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
 /* parse the 3rd byte of a varint into p->parsing.value
    no overflow is possible */
-static grpc_error* parse_value2(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value2(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   if (cur == end) {
     p->state = parse_value2;
@@ -1171,16 +1109,15 @@
   *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 14;
 
   if ((*cur) & 0x80) {
-    return parse_value3(exec_ctx, p, cur + 1, end);
+    return parse_value3(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
 /* parse the 4th byte of a varint into p->parsing.value
    no overflow is possible */
-static grpc_error* parse_value3(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value3(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   if (cur == end) {
     p->state = parse_value3;
@@ -1190,16 +1127,15 @@
   *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 21;
 
   if ((*cur) & 0x80) {
-    return parse_value4(exec_ctx, p, cur + 1, end);
+    return parse_value4(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
 /* parse the 5th byte of a varint into p->parsing.value
    depending on the byte, we may overflow, and care must be taken */
-static grpc_error* parse_value4(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_value4(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   uint8_t c;
   uint32_t cur_value;
@@ -1225,9 +1161,9 @@
   *p->parsing.value = cur_value + add_value;
 
   if ((*cur) & 0x80) {
-    return parse_value5up(exec_ctx, p, cur + 1, end);
+    return parse_value5up(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 
 error:
@@ -1237,14 +1173,13 @@
                *p->parsing.value, *cur);
   grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
   gpr_free(msg);
-  return parse_error(exec_ctx, p, cur, end, err);
+  return parse_error(p, cur, end, err);
 }
 
 /* parse any trailing bytes in a varint: it's possible to append an arbitrary
    number of 0x80's and not affect the value - a zero will terminate - and
    anything else will overflow */
-static grpc_error* parse_value5up(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_value5up(grpc_chttp2_hpack_parser* p,
                                   const uint8_t* cur, const uint8_t* end) {
   while (cur != end && *cur == 0x80) {
     ++cur;
@@ -1256,7 +1191,7 @@
   }
 
   if (*cur == 0) {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 
   char* msg;
@@ -1266,12 +1201,11 @@
                *p->parsing.value, *cur);
   grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
   gpr_free(msg);
-  return parse_error(exec_ctx, p, cur, end, err);
+  return parse_error(p, cur, end, err);
 }
 
 /* parse a string prefix */
-static grpc_error* parse_string_prefix(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_string_prefix(grpc_chttp2_hpack_parser* p,
                                        const uint8_t* cur, const uint8_t* end) {
   if (cur == end) {
     p->state = parse_string_prefix;
@@ -1282,9 +1216,9 @@
   p->huff = (*cur) >> 7;
   if (p->strlen == 0x7f) {
     p->parsing.value = &p->strlen;
-    return parse_value0(exec_ctx, p, cur + 1, end);
+    return parse_value0(p, cur + 1, end);
   } else {
-    return parse_next(exec_ctx, p, cur + 1, end);
+    return parse_next(p, cur + 1, end);
   }
 }
 
@@ -1303,8 +1237,7 @@
   str->data.copied.length += (uint32_t)length;
 }
 
-static grpc_error* append_string(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_hpack_parser* p,
+static grpc_error* append_string(grpc_chttp2_hpack_parser* p,
                                  const uint8_t* cur, const uint8_t* end) {
   grpc_chttp2_hpack_parser_string* str = p->parsing.str;
   uint32_t bits;
@@ -1322,11 +1255,11 @@
         /* 'true-binary' case */
         ++cur;
         p->binary = NOT_BINARY;
-        GRPC_STATS_INC_HPACK_RECV_BINARY(exec_ctx);
+        GRPC_STATS_INC_HPACK_RECV_BINARY();
         append_bytes(str, cur, (size_t)(end - cur));
         return GRPC_ERROR_NONE;
       }
-      GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64(exec_ctx);
+      GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64();
     /* fallthrough */
     b64_byte0:
     case B64_BYTE0:
@@ -1338,7 +1271,7 @@
       ++cur;
       if (bits == 255)
         return parse_error(
-            exec_ctx, p, cur, end,
+            p, cur, end,
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal base64 character"));
       else if (bits == 64)
         goto b64_byte0;
@@ -1354,7 +1287,7 @@
       ++cur;
       if (bits == 255)
         return parse_error(
-            exec_ctx, p, cur, end,
+            p, cur, end,
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal base64 character"));
       else if (bits == 64)
         goto b64_byte1;
@@ -1370,7 +1303,7 @@
       ++cur;
       if (bits == 255)
         return parse_error(
-            exec_ctx, p, cur, end,
+            p, cur, end,
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal base64 character"));
       else if (bits == 64)
         goto b64_byte2;
@@ -1386,7 +1319,7 @@
       ++cur;
       if (bits == 255)
         return parse_error(
-            exec_ctx, p, cur, end,
+            p, cur, end,
             GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal base64 character"));
       else if (bits == 64)
         goto b64_byte3;
@@ -1399,12 +1332,11 @@
       goto b64_byte0;
   }
   GPR_UNREACHABLE_CODE(return parse_error(
-      exec_ctx, p, cur, end,
+      p, cur, end,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Should never reach here")));
 }
 
-static grpc_error* finish_str(grpc_exec_ctx* exec_ctx,
-                              grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* finish_str(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                               const uint8_t* end) {
   uint8_t decoded[2];
   uint32_t bits;
@@ -1417,7 +1349,7 @@
     case B64_BYTE0:
       break;
     case B64_BYTE1:
-      return parse_error(exec_ctx, p, cur, end,
+      return parse_error(p, cur, end,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                              "illegal base64 encoding")); /* illegal encoding */
     case B64_BYTE2:
@@ -1428,7 +1360,7 @@
                      bits & 0xffff);
         grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
         gpr_free(msg);
-        return parse_error(exec_ctx, p, cur, end, err);
+        return parse_error(p, cur, end, err);
       }
       decoded[0] = (uint8_t)(bits >> 16);
       append_bytes(str, decoded, 1);
@@ -1441,7 +1373,7 @@
                      bits & 0xff);
         grpc_error* err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
         gpr_free(msg);
-        return parse_error(exec_ctx, p, cur, end, err);
+        return parse_error(p, cur, end, err);
       }
       decoded[0] = (uint8_t)(bits >> 16);
       decoded[1] = (uint8_t)(bits >> 8);
@@ -1452,14 +1384,13 @@
 }
 
 /* decode a nibble from a huffman encoded stream */
-static grpc_error* huff_nibble(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hpack_parser* p, uint8_t nibble) {
+static grpc_error* huff_nibble(grpc_chttp2_hpack_parser* p, uint8_t nibble) {
   int16_t emit = emit_sub_tbl[16 * emit_tbl[p->huff_state] + nibble];
   int16_t next = next_sub_tbl[16 * next_tbl[p->huff_state] + nibble];
   if (emit != -1) {
     if (emit >= 0 && emit < 256) {
       uint8_t c = (uint8_t)emit;
-      grpc_error* err = append_string(exec_ctx, p, &c, (&c) + 1);
+      grpc_error* err = append_string(p, &c, (&c) + 1);
       if (err != GRPC_ERROR_NONE) return err;
     } else {
       assert(emit == 256);
@@ -1470,45 +1401,42 @@
 }
 
 /* decode full bytes from a huffman encoded stream */
-static grpc_error* add_huff_bytes(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hpack_parser* p,
+static grpc_error* add_huff_bytes(grpc_chttp2_hpack_parser* p,
                                   const uint8_t* cur, const uint8_t* end) {
   for (; cur != end; ++cur) {
-    grpc_error* err = huff_nibble(exec_ctx, p, *cur >> 4);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-    err = huff_nibble(exec_ctx, p, *cur & 0xf);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
+    grpc_error* err = huff_nibble(p, *cur >> 4);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+    err = huff_nibble(p, *cur & 0xf);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
   }
   return GRPC_ERROR_NONE;
 }
 
 /* decode some string bytes based on the current decoding mode
    (huffman or not) */
-static grpc_error* add_str_bytes(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_hpack_parser* p,
+static grpc_error* add_str_bytes(grpc_chttp2_hpack_parser* p,
                                  const uint8_t* cur, const uint8_t* end) {
   if (p->huff) {
-    return add_huff_bytes(exec_ctx, p, cur, end);
+    return add_huff_bytes(p, cur, end);
   } else {
-    return append_string(exec_ctx, p, cur, end);
+    return append_string(p, cur, end);
   }
 }
 
 /* parse a string - tries to do large chunks at a time */
-static grpc_error* parse_string(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_hpack_parser* p, const uint8_t* cur,
+static grpc_error* parse_string(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   size_t remaining = p->strlen - p->strgot;
   size_t given = (size_t)(end - cur);
   if (remaining <= given) {
-    grpc_error* err = add_str_bytes(exec_ctx, p, cur, cur + remaining);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-    err = finish_str(exec_ctx, p, cur + remaining, end);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-    return parse_next(exec_ctx, p, cur + remaining, end);
+    grpc_error* err = add_str_bytes(p, cur, cur + remaining);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+    err = finish_str(p, cur + remaining, end);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+    return parse_next(p, cur + remaining, end);
   } else {
-    grpc_error* err = add_str_bytes(exec_ctx, p, cur, cur + given);
-    if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
+    grpc_error* err = add_str_bytes(p, cur, cur + given);
+    if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
     GPR_ASSERT(given <= UINT32_MAX - p->strgot);
     p->strgot += (uint32_t)given;
     p->state = parse_string;
@@ -1517,20 +1445,19 @@
 }
 
 /* begin parsing a string - performs setup, calls parse_string */
-static grpc_error* begin_parse_string(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p,
+static grpc_error* begin_parse_string(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end,
                                       uint8_t binary,
                                       grpc_chttp2_hpack_parser_string* str) {
   if (!p->huff && binary == NOT_BINARY && (end - cur) >= (intptr_t)p->strlen &&
       p->current_slice_refcount != nullptr) {
-    GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED(exec_ctx);
+    GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED();
     str->copied = false;
     str->data.referenced.refcount = p->current_slice_refcount;
     str->data.referenced.data.refcounted.bytes = (uint8_t*)cur;
     str->data.referenced.data.refcounted.length = p->strlen;
     grpc_slice_ref_internal(str->data.referenced);
-    return parse_next(exec_ctx, p, cur + p->strlen, end);
+    return parse_next(p, cur + p->strlen, end);
   }
   p->strgot = 0;
   str->copied = true;
@@ -1541,9 +1468,9 @@
   switch (p->binary) {
     case NOT_BINARY:
       if (p->huff) {
-        GRPC_STATS_INC_HPACK_RECV_HUFFMAN(exec_ctx);
+        GRPC_STATS_INC_HPACK_RECV_HUFFMAN();
       } else {
-        GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED(exec_ctx);
+        GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED();
       }
       break;
     case BINARY_BEGIN:
@@ -1552,14 +1479,13 @@
     default:
       abort();
   }
-  return parse_string(exec_ctx, p, cur, end);
+  return parse_string(p, cur, end);
 }
 
 /* parse the key string */
-static grpc_error* parse_key_string(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_key_string(grpc_chttp2_hpack_parser* p,
                                     const uint8_t* cur, const uint8_t* end) {
-  return begin_parse_string(exec_ctx, p, cur, end, NOT_BINARY, &p->key);
+  return begin_parse_string(p, cur, end, NOT_BINARY, &p->key);
 }
 
 /* check if a key represents a binary header or not */
@@ -1586,33 +1512,29 @@
 }
 
 /* parse the value string */
-static grpc_error* parse_value_string(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p,
+static grpc_error* parse_value_string(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end,
                                       bool is_binary) {
-  return begin_parse_string(exec_ctx, p, cur, end,
-                            is_binary ? BINARY_BEGIN : NOT_BINARY, &p->value);
+  return begin_parse_string(p, cur, end, is_binary ? BINARY_BEGIN : NOT_BINARY,
+                            &p->value);
 }
 
 static grpc_error* parse_value_string_with_indexed_key(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* cur,
-    const uint8_t* end) {
+    grpc_chttp2_hpack_parser* p, const uint8_t* cur, const uint8_t* end) {
   bool is_binary = false;
   grpc_error* err = is_binary_indexed_header(p, &is_binary);
-  if (err != GRPC_ERROR_NONE) return parse_error(exec_ctx, p, cur, end, err);
-  return parse_value_string(exec_ctx, p, cur, end, is_binary);
+  if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
+  return parse_value_string(p, cur, end, is_binary);
 }
 
 static grpc_error* parse_value_string_with_literal_key(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* cur,
-    const uint8_t* end) {
-  return parse_value_string(exec_ctx, p, cur, end, is_binary_literal_header(p));
+    grpc_chttp2_hpack_parser* p, const uint8_t* cur, const uint8_t* end) {
+  return parse_value_string(p, cur, end, is_binary_literal_header(p));
 }
 
 /* PUBLIC INTERFACE */
 
-void grpc_chttp2_hpack_parser_init(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_hpack_parser* p) {
+void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser* p) {
   p->on_header = nullptr;
   p->on_header_user_data = nullptr;
   p->state = parse_begin;
@@ -1626,7 +1548,7 @@
   p->value.data.copied.length = 0;
   p->dynamic_table_update_allowed = 2;
   p->last_error = GRPC_ERROR_NONE;
-  grpc_chttp2_hptbl_init(exec_ctx, &p->table);
+  grpc_chttp2_hptbl_init(&p->table);
 }
 
 void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser* p) {
@@ -1634,18 +1556,16 @@
   p->state = parse_stream_dep0;
 }
 
-void grpc_chttp2_hpack_parser_destroy(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p) {
-  grpc_chttp2_hptbl_destroy(exec_ctx, &p->table);
+void grpc_chttp2_hpack_parser_destroy(grpc_chttp2_hpack_parser* p) {
+  grpc_chttp2_hptbl_destroy(&p->table);
   GRPC_ERROR_UNREF(p->last_error);
-  grpc_slice_unref_internal(exec_ctx, p->key.data.referenced);
-  grpc_slice_unref_internal(exec_ctx, p->value.data.referenced);
+  grpc_slice_unref_internal(p->key.data.referenced);
+  grpc_slice_unref_internal(p->value.data.referenced);
   gpr_free(p->key.data.copied.str);
   gpr_free(p->value.data.copied.str);
 }
 
-grpc_error* grpc_chttp2_hpack_parser_parse(grpc_exec_ctx* exec_ctx,
-                                           grpc_chttp2_hpack_parser* p,
+grpc_error* grpc_chttp2_hpack_parser_parse(grpc_chttp2_hpack_parser* p,
                                            grpc_slice slice) {
 /* max number of bytes to parse at a time... limits call stack depth on
  * compilers without TCO */
@@ -1656,37 +1576,33 @@
   grpc_error* error = GRPC_ERROR_NONE;
   while (start != end && error == GRPC_ERROR_NONE) {
     uint8_t* target = start + GPR_MIN(MAX_PARSE_LENGTH, end - start);
-    error = p->state(exec_ctx, p, start, target);
+    error = p->state(p, start, target);
     start = target;
   }
   p->current_slice_refcount = nullptr;
   return error;
 }
 
-typedef void (*maybe_complete_func_type)(grpc_exec_ctx* exec_ctx,
-                                         grpc_chttp2_transport* t,
+typedef void (*maybe_complete_func_type)(grpc_chttp2_transport* t,
                                          grpc_chttp2_stream* s);
 static const maybe_complete_func_type maybe_complete_funcs[] = {
     grpc_chttp2_maybe_complete_recv_initial_metadata,
     grpc_chttp2_maybe_complete_recv_trailing_metadata};
 
-static void force_client_rst_stream(grpc_exec_ctx* exec_ctx, void* sp,
-                                    grpc_error* error) {
+static void force_client_rst_stream(void* sp, grpc_error* error) {
   grpc_chttp2_stream* s = (grpc_chttp2_stream*)sp;
   grpc_chttp2_transport* t = s->t;
   if (!s->write_closed) {
     grpc_slice_buffer_add(
         &t->qbuf, grpc_chttp2_rst_stream_create(s->id, GRPC_HTTP2_NO_ERROR,
                                                 &s->stats.outgoing));
-    grpc_chttp2_initiate_write(exec_ctx, t,
-                               GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM);
-    grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, true, GRPC_ERROR_NONE);
+    grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_FORCE_RST_STREAM);
+    grpc_chttp2_mark_stream_closed(t, s, true, true, GRPC_ERROR_NONE);
   }
-  GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "final_rst");
+  GRPC_CHTTP2_STREAM_UNREF(s, "final_rst");
 }
 
-static void parse_stream_compression_md(grpc_exec_ctx* exec_ctx,
-                                        grpc_chttp2_transport* t,
+static void parse_stream_compression_md(grpc_chttp2_transport* t,
                                         grpc_chttp2_stream* s,
                                         grpc_metadata_batch* initial_metadata) {
   if (initial_metadata->idx.named.content_encoding == nullptr ||
@@ -1698,8 +1614,7 @@
   }
 }
 
-grpc_error* grpc_chttp2_header_parser_parse(grpc_exec_ctx* exec_ctx,
-                                            void* hpack_parser,
+grpc_error* grpc_chttp2_header_parser_parse(void* hpack_parser,
                                             grpc_chttp2_transport* t,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last) {
@@ -1708,7 +1623,7 @@
   if (s != nullptr) {
     s->stats.incoming.header_bytes += GRPC_SLICE_LENGTH(slice);
   }
-  grpc_error* error = grpc_chttp2_hpack_parser_parse(exec_ctx, parser, slice);
+  grpc_error* error = grpc_chttp2_hpack_parser_parse(parser, slice);
   if (error != GRPC_ERROR_NONE) {
     GPR_TIMER_END("grpc_chttp2_hpack_parser_parse", 0);
     return error;
@@ -1731,12 +1646,11 @@
         /* Process stream compression md element if it exists */
         if (s->header_frames_received ==
             0) { /* Only acts on initial metadata */
-          parse_stream_compression_md(exec_ctx, t, s,
-                                      &s->metadata_buffer[0].batch);
+          parse_stream_compression_md(t, s, &s->metadata_buffer[0].batch);
         }
         s->published_metadata[s->header_frames_received] =
             GRPC_METADATA_PUBLISHED_FROM_WIRE;
-        maybe_complete_funcs[s->header_frames_received](exec_ctx, t, s);
+        maybe_complete_funcs[s->header_frames_received](t, s);
         s->header_frames_received++;
       }
       if (parser->is_eof) {
@@ -1747,13 +1661,11 @@
              and can avoid the extra write */
           GRPC_CHTTP2_STREAM_REF(s, "final_rst");
           GRPC_CLOSURE_SCHED(
-              exec_ctx,
               GRPC_CLOSURE_CREATE(force_client_rst_stream, s,
                                   grpc_combiner_finally_scheduler(t->combiner)),
               GRPC_ERROR_NONE);
         }
-        grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, false,
-                                       GRPC_ERROR_NONE);
+        grpc_chttp2_mark_stream_closed(t, s, true, false, GRPC_ERROR_NONE);
       }
     }
     parser->on_header = nullptr;
diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.h b/src/core/ext/transport/chttp2/transport/hpack_parser.h
index b4a2b14..060bc5c 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.h
@@ -30,8 +30,7 @@
 typedef struct grpc_chttp2_hpack_parser grpc_chttp2_hpack_parser;
 
 typedef grpc_error* (*grpc_chttp2_hpack_parser_state)(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_hpack_parser* p, const uint8_t* beg,
-    const uint8_t* end);
+    grpc_chttp2_hpack_parser* p, const uint8_t* beg, const uint8_t* end);
 
 typedef struct {
   bool copied;
@@ -47,7 +46,7 @@
 
 struct grpc_chttp2_hpack_parser {
   /* user specified callback for each header output */
-  void (*on_header)(grpc_exec_ctx* exec_ctx, void* user_data, grpc_mdelem md);
+  void (*on_header)(void* user_data, grpc_mdelem md);
   void* on_header_user_data;
 
   grpc_error* last_error;
@@ -92,21 +91,17 @@
   grpc_chttp2_hptbl table;
 };
 
-void grpc_chttp2_hpack_parser_init(grpc_exec_ctx* exec_ctx,
-                                   grpc_chttp2_hpack_parser* p);
-void grpc_chttp2_hpack_parser_destroy(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_hpack_parser* p);
+void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser* p);
+void grpc_chttp2_hpack_parser_destroy(grpc_chttp2_hpack_parser* p);
 
 void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser* p);
 
-grpc_error* grpc_chttp2_hpack_parser_parse(grpc_exec_ctx* exec_ctx,
-                                           grpc_chttp2_hpack_parser* p,
+grpc_error* grpc_chttp2_hpack_parser_parse(grpc_chttp2_hpack_parser* p,
                                            grpc_slice slice);
 
 /* wraps grpc_chttp2_hpack_parser_parse to provide a frame level parser for
    the transport */
-grpc_error* grpc_chttp2_header_parser_parse(grpc_exec_ctx* exec_ctx,
-                                            void* hpack_parser,
+grpc_error* grpc_chttp2_header_parser_parse(void* hpack_parser,
                                             grpc_chttp2_transport* t,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last);
diff --git a/src/core/ext/transport/chttp2/transport/hpack_table.cc b/src/core/ext/transport/chttp2/transport/hpack_table.cc
index 75b83b8..c325465 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_table.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.cc
@@ -165,7 +165,7 @@
          GRPC_CHTTP2_HPACK_ENTRY_OVERHEAD;
 }
 
-void grpc_chttp2_hptbl_init(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl) {
+void grpc_chttp2_hptbl_init(grpc_chttp2_hptbl* tbl) {
   size_t i;
 
   memset(tbl, 0, sizeof(*tbl));
@@ -177,22 +177,19 @@
   memset(tbl->ents, 0, sizeof(*tbl->ents) * tbl->cap_entries);
   for (i = 1; i <= GRPC_CHTTP2_LAST_STATIC_ENTRY; i++) {
     tbl->static_ents[i - 1] = grpc_mdelem_from_slices(
-        exec_ctx,
         grpc_slice_intern(grpc_slice_from_static_string(static_table[i].key)),
         grpc_slice_intern(
             grpc_slice_from_static_string(static_table[i].value)));
   }
 }
 
-void grpc_chttp2_hptbl_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_hptbl* tbl) {
+void grpc_chttp2_hptbl_destroy(grpc_chttp2_hptbl* tbl) {
   size_t i;
   for (i = 0; i < GRPC_CHTTP2_LAST_STATIC_ENTRY; i++) {
-    GRPC_MDELEM_UNREF(exec_ctx, tbl->static_ents[i]);
+    GRPC_MDELEM_UNREF(tbl->static_ents[i]);
   }
   for (i = 0; i < tbl->num_ents; i++) {
-    GRPC_MDELEM_UNREF(exec_ctx,
-                      tbl->ents[(tbl->first_ent + i) % tbl->cap_entries]);
+    GRPC_MDELEM_UNREF(tbl->ents[(tbl->first_ent + i) % tbl->cap_entries]);
   }
   gpr_free(tbl->ents);
 }
@@ -215,7 +212,7 @@
 }
 
 /* Evict one element from the table */
-static void evict1(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl) {
+static void evict1(grpc_chttp2_hptbl* tbl) {
   grpc_mdelem first_ent = tbl->ents[tbl->first_ent];
   size_t elem_bytes = GRPC_SLICE_LENGTH(GRPC_MDKEY(first_ent)) +
                       GRPC_SLICE_LENGTH(GRPC_MDVALUE(first_ent)) +
@@ -224,7 +221,7 @@
   tbl->mem_used -= (uint32_t)elem_bytes;
   tbl->first_ent = ((tbl->first_ent + 1) % tbl->cap_entries);
   tbl->num_ents--;
-  GRPC_MDELEM_UNREF(exec_ctx, first_ent);
+  GRPC_MDELEM_UNREF(first_ent);
 }
 
 static void rebuild_ents(grpc_chttp2_hptbl* tbl, uint32_t new_cap) {
@@ -240,8 +237,7 @@
   tbl->first_ent = 0;
 }
 
-void grpc_chttp2_hptbl_set_max_bytes(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hptbl* tbl,
+void grpc_chttp2_hptbl_set_max_bytes(grpc_chttp2_hptbl* tbl,
                                      uint32_t max_bytes) {
   if (tbl->max_bytes == max_bytes) {
     return;
@@ -250,13 +246,12 @@
     gpr_log(GPR_DEBUG, "Update hpack parser max size to %d", max_bytes);
   }
   while (tbl->mem_used > max_bytes) {
-    evict1(exec_ctx, tbl);
+    evict1(tbl);
   }
   tbl->max_bytes = max_bytes;
 }
 
-grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_exec_ctx* exec_ctx,
-                                                     grpc_chttp2_hptbl* tbl,
+grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_chttp2_hptbl* tbl,
                                                      uint32_t bytes) {
   if (tbl->current_table_bytes == bytes) {
     return GRPC_ERROR_NONE;
@@ -274,7 +269,7 @@
     gpr_log(GPR_DEBUG, "Update hpack parser table size to %d", bytes);
   }
   while (tbl->mem_used > bytes) {
-    evict1(exec_ctx, tbl);
+    evict1(tbl);
   }
   tbl->current_table_bytes = bytes;
   tbl->max_entries = entries_for_bytes(bytes);
@@ -289,8 +284,7 @@
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_chttp2_hptbl_add(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hptbl* tbl, grpc_mdelem md) {
+grpc_error* grpc_chttp2_hptbl_add(grpc_chttp2_hptbl* tbl, grpc_mdelem md) {
   /* determine how many bytes of buffer this entry represents */
   size_t elem_bytes = GRPC_SLICE_LENGTH(GRPC_MDKEY(md)) +
                       GRPC_SLICE_LENGTH(GRPC_MDVALUE(md)) +
@@ -320,14 +314,14 @@
      * empty table.
      */
     while (tbl->num_ents) {
-      evict1(exec_ctx, tbl);
+      evict1(tbl);
     }
     return GRPC_ERROR_NONE;
   }
 
   /* evict entries to ensure no overflow */
   while (elem_bytes > (size_t)tbl->current_table_bytes - tbl->mem_used) {
-    evict1(exec_ctx, tbl);
+    evict1(tbl);
   }
 
   /* copy the finalized entry in */
diff --git a/src/core/ext/transport/chttp2/transport/hpack_table.h b/src/core/ext/transport/chttp2/transport/hpack_table.h
index aed7b13..189ad1c 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_table.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.h
@@ -69,21 +69,18 @@
 } grpc_chttp2_hptbl;
 
 /* initialize a hpack table */
-void grpc_chttp2_hptbl_init(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl);
-void grpc_chttp2_hptbl_destroy(grpc_exec_ctx* exec_ctx, grpc_chttp2_hptbl* tbl);
-void grpc_chttp2_hptbl_set_max_bytes(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_hptbl* tbl,
+void grpc_chttp2_hptbl_init(grpc_chttp2_hptbl* tbl);
+void grpc_chttp2_hptbl_destroy(grpc_chttp2_hptbl* tbl);
+void grpc_chttp2_hptbl_set_max_bytes(grpc_chttp2_hptbl* tbl,
                                      uint32_t max_bytes);
-grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_exec_ctx* exec_ctx,
-                                                     grpc_chttp2_hptbl* tbl,
+grpc_error* grpc_chttp2_hptbl_set_current_table_size(grpc_chttp2_hptbl* tbl,
                                                      uint32_t bytes);
 
 /* lookup a table entry based on its hpack index */
 grpc_mdelem grpc_chttp2_hptbl_lookup(const grpc_chttp2_hptbl* tbl,
                                      uint32_t index);
 /* add a table entry to the index */
-grpc_error* grpc_chttp2_hptbl_add(grpc_exec_ctx* exec_ctx,
-                                  grpc_chttp2_hptbl* tbl,
+grpc_error* grpc_chttp2_hptbl_add(grpc_chttp2_hptbl* tbl,
                                   grpc_mdelem md) GRPC_MUST_USE_RESULT;
 /* Find a key/value pair in the table... returns the index in the table of the
    most similar entry, or 0 if the value was not found */
diff --git a/src/core/ext/transport/chttp2/transport/incoming_metadata.cc b/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
index 4461f8c..ef0c9ed 100644
--- a/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
+++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
@@ -33,33 +33,31 @@
 }
 
 void grpc_chttp2_incoming_metadata_buffer_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer) {
-  grpc_metadata_batch_destroy(exec_ctx, &buffer->batch);
+    grpc_chttp2_incoming_metadata_buffer* buffer) {
+  grpc_metadata_batch_destroy(&buffer->batch);
 }
 
 grpc_error* grpc_chttp2_incoming_metadata_buffer_add(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
-    grpc_mdelem elem) {
+    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_mdelem elem) {
   buffer->size += GRPC_MDELEM_LENGTH(elem);
   return grpc_metadata_batch_add_tail(
-      exec_ctx, &buffer->batch,
+      &buffer->batch,
       (grpc_linked_mdelem*)gpr_arena_alloc(buffer->arena,
                                            sizeof(grpc_linked_mdelem)),
       elem);
 }
 
 grpc_error* grpc_chttp2_incoming_metadata_buffer_replace_or_add(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
-    grpc_mdelem elem) {
+    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_mdelem elem) {
   for (grpc_linked_mdelem* l = buffer->batch.list.head; l != nullptr;
        l = l->next) {
     if (grpc_slice_eq(GRPC_MDKEY(l->md), GRPC_MDKEY(elem))) {
-      GRPC_MDELEM_UNREF(exec_ctx, l->md);
+      GRPC_MDELEM_UNREF(l->md);
       l->md = elem;
       return GRPC_ERROR_NONE;
     }
   }
-  return grpc_chttp2_incoming_metadata_buffer_add(exec_ctx, buffer, elem);
+  return grpc_chttp2_incoming_metadata_buffer_add(buffer, elem);
 }
 
 void grpc_chttp2_incoming_metadata_buffer_set_deadline(
@@ -68,8 +66,7 @@
 }
 
 void grpc_chttp2_incoming_metadata_buffer_publish(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
-    grpc_metadata_batch* batch) {
+    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_metadata_batch* batch) {
   *batch = buffer->batch;
   grpc_metadata_batch_init(&buffer->batch);
 }
diff --git a/src/core/ext/transport/chttp2/transport/incoming_metadata.h b/src/core/ext/transport/chttp2/transport/incoming_metadata.h
index 6f2b81e..b84cd48 100644
--- a/src/core/ext/transport/chttp2/transport/incoming_metadata.h
+++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.h
@@ -31,16 +31,15 @@
 void grpc_chttp2_incoming_metadata_buffer_init(
     grpc_chttp2_incoming_metadata_buffer* buffer, gpr_arena* arena);
 void grpc_chttp2_incoming_metadata_buffer_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer);
+    grpc_chttp2_incoming_metadata_buffer* buffer);
 void grpc_chttp2_incoming_metadata_buffer_publish(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
-    grpc_metadata_batch* batch);
+    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_metadata_batch* batch);
 
 grpc_error* grpc_chttp2_incoming_metadata_buffer_add(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
+    grpc_chttp2_incoming_metadata_buffer* buffer,
     grpc_mdelem elem) GRPC_MUST_USE_RESULT;
 grpc_error* grpc_chttp2_incoming_metadata_buffer_replace_or_add(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_metadata_buffer* buffer,
+    grpc_chttp2_incoming_metadata_buffer* buffer,
     grpc_mdelem elem) GRPC_MUST_USE_RESULT;
 void grpc_chttp2_incoming_metadata_buffer_set_deadline(
     grpc_chttp2_incoming_metadata_buffer* buffer, grpc_millis deadline);
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index 9404213..932f5ba 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -241,6 +241,8 @@
 
   grpc_combiner* combiner;
 
+  grpc_closure* notify_on_receive_settings;
+
   /** write execution state of the transport */
   grpc_chttp2_write_state write_state;
   /** is this the first write in a series of writes?
@@ -280,8 +282,8 @@
 
   struct {
     /* accept stream callback */
-    void (*accept_stream)(grpc_exec_ctx* exec_ctx, void* user_data,
-                          grpc_transport* transport, const void* server_data);
+    void (*accept_stream)(void* user_data, grpc_transport* transport,
+                          const void* server_data);
     void* accept_stream_user_data;
 
     /** connectivity tracking */
@@ -369,9 +371,8 @@
   /* active parser */
   void* parser_data;
   grpc_chttp2_stream* incoming_stream;
-  grpc_error* (*parser)(grpc_exec_ctx* exec_ctx, void* parser_user_data,
-                        grpc_chttp2_transport* t, grpc_chttp2_stream* s,
-                        grpc_slice slice, int is_last);
+  grpc_error* (*parser)(void* parser_user_data, grpc_chttp2_transport* t,
+                        grpc_chttp2_stream* s, grpc_slice slice, int is_last);
 
   grpc_chttp2_write_cb* write_cb_pool;
 
@@ -569,8 +570,7 @@
 
     The actual call chain is documented in the implementation of this function.
     */
-void grpc_chttp2_initiate_write(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_transport* t,
+void grpc_chttp2_initiate_write(grpc_chttp2_transport* t,
                                 grpc_chttp2_initiate_write_reason reason);
 
 typedef struct {
@@ -583,14 +583,12 @@
 } grpc_chttp2_begin_write_result;
 
 grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t);
-void grpc_chttp2_end_write(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                           grpc_error* error);
+    grpc_chttp2_transport* t);
+void grpc_chttp2_end_write(grpc_chttp2_transport* t, grpc_error* error);
 
 /** Process one slice of incoming data; return 1 if the connection is still
     viable after reading, or 0 if the connection should be torn down */
-grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
                                      grpc_slice slice);
 
 bool grpc_chttp2_list_add_writable_stream(grpc_chttp2_transport* t,
@@ -638,27 +636,23 @@
 
 // Takes in a flow control action and performs all the needed operations.
 void grpc_chttp2_act_on_flowctl_action(
-    grpc_exec_ctx* exec_ctx, const grpc_core::chttp2::FlowControlAction& action,
+    const grpc_core::chttp2::FlowControlAction& action,
     grpc_chttp2_transport* t, grpc_chttp2_stream* s);
 
 /********* End of Flow Control ***************/
 
 grpc_chttp2_stream* grpc_chttp2_parsing_lookup_stream(grpc_chttp2_transport* t,
                                                       uint32_t id);
-grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_exec_ctx* exec_ctx,
-                                                      grpc_chttp2_transport* t,
+grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_chttp2_transport* t,
                                                       uint32_t id);
 
-void grpc_chttp2_add_incoming_goaway(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+void grpc_chttp2_add_incoming_goaway(grpc_chttp2_transport* t,
                                      uint32_t goaway_error,
                                      grpc_slice goaway_text);
 
-void grpc_chttp2_parsing_become_skip_parser(grpc_exec_ctx* exec_ctx,
-                                            grpc_chttp2_transport* t);
+void grpc_chttp2_parsing_become_skip_parser(grpc_chttp2_transport* t);
 
-void grpc_chttp2_complete_closure_step(grpc_exec_ctx* exec_ctx,
-                                       grpc_chttp2_transport* t,
+void grpc_chttp2_complete_closure_step(grpc_chttp2_transport* t,
                                        grpc_chttp2_stream* s,
                                        grpc_closure** pclosure,
                                        grpc_error* error, const char* desc);
@@ -679,94 +673,80 @@
   else                               \
     stmt
 
-void grpc_chttp2_fake_status(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
+void grpc_chttp2_fake_status(grpc_chttp2_transport* t,
                              grpc_chttp2_stream* stream, grpc_error* error);
-void grpc_chttp2_mark_stream_closed(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t,
+void grpc_chttp2_mark_stream_closed(grpc_chttp2_transport* t,
                                     grpc_chttp2_stream* s, int close_reads,
                                     int close_writes, grpc_error* error);
-void grpc_chttp2_start_writing(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_transport* t);
+void grpc_chttp2_start_writing(grpc_chttp2_transport* t);
 
 #ifndef NDEBUG
 #define GRPC_CHTTP2_STREAM_REF(stream, reason) \
   grpc_chttp2_stream_ref(stream, reason)
-#define GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream, reason) \
-  grpc_chttp2_stream_unref(exec_ctx, stream, reason)
+#define GRPC_CHTTP2_STREAM_UNREF(stream, reason) \
+  grpc_chttp2_stream_unref(stream, reason)
 void grpc_chttp2_stream_ref(grpc_chttp2_stream* s, const char* reason);
-void grpc_chttp2_stream_unref(grpc_exec_ctx* exec_ctx, grpc_chttp2_stream* s,
-                              const char* reason);
+void grpc_chttp2_stream_unref(grpc_chttp2_stream* s, const char* reason);
 #else
 #define GRPC_CHTTP2_STREAM_REF(stream, reason) grpc_chttp2_stream_ref(stream)
-#define GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream, reason) \
-  grpc_chttp2_stream_unref(exec_ctx, stream)
+#define GRPC_CHTTP2_STREAM_UNREF(stream, reason) \
+  grpc_chttp2_stream_unref(stream)
 void grpc_chttp2_stream_ref(grpc_chttp2_stream* s);
-void grpc_chttp2_stream_unref(grpc_exec_ctx* exec_ctx, grpc_chttp2_stream* s);
+void grpc_chttp2_stream_unref(grpc_chttp2_stream* s);
 #endif
 
 #ifndef NDEBUG
 #define GRPC_CHTTP2_REF_TRANSPORT(t, r) \
   grpc_chttp2_ref_transport(t, r, __FILE__, __LINE__)
-#define GRPC_CHTTP2_UNREF_TRANSPORT(cl, t, r) \
-  grpc_chttp2_unref_transport(cl, t, r, __FILE__, __LINE__)
-void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t, const char* reason,
+#define GRPC_CHTTP2_UNREF_TRANSPORT(t, r) \
+  grpc_chttp2_unref_transport(t, r, __FILE__, __LINE__)
+void grpc_chttp2_unref_transport(grpc_chttp2_transport* t, const char* reason,
                                  const char* file, int line);
 void grpc_chttp2_ref_transport(grpc_chttp2_transport* t, const char* reason,
                                const char* file, int line);
 #else
 #define GRPC_CHTTP2_REF_TRANSPORT(t, r) grpc_chttp2_ref_transport(t)
-#define GRPC_CHTTP2_UNREF_TRANSPORT(cl, t, r) grpc_chttp2_unref_transport(cl, t)
-void grpc_chttp2_unref_transport(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t);
+#define GRPC_CHTTP2_UNREF_TRANSPORT(t, r) grpc_chttp2_unref_transport(t)
+void grpc_chttp2_unref_transport(grpc_chttp2_transport* t);
 void grpc_chttp2_ref_transport(grpc_chttp2_transport* t);
 #endif
 
 grpc_chttp2_incoming_byte_stream* grpc_chttp2_incoming_byte_stream_create(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t, grpc_chttp2_stream* s,
-    uint32_t frame_size, uint32_t flags);
+    grpc_chttp2_transport* t, grpc_chttp2_stream* s, uint32_t frame_size,
+    uint32_t flags);
 grpc_error* grpc_chttp2_incoming_byte_stream_push(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_slice slice, grpc_slice* slice_out);
+    grpc_chttp2_incoming_byte_stream* bs, grpc_slice slice,
+    grpc_slice* slice_out);
 grpc_error* grpc_chttp2_incoming_byte_stream_finished(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error, bool reset_on_error);
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error,
+    bool reset_on_error);
 void grpc_chttp2_incoming_byte_stream_notify(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_incoming_byte_stream* bs,
-    grpc_error* error);
+    grpc_chttp2_incoming_byte_stream* bs, grpc_error* error);
 
-void grpc_chttp2_ack_ping(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                          uint64_t id);
+void grpc_chttp2_ack_ping(grpc_chttp2_transport* t, uint64_t id);
 
 /** Add a new ping strike to ping_recv_state.ping_strikes. If
     ping_recv_state.ping_strikes > ping_policy.max_ping_strikes, it sends GOAWAY
     with error code ENHANCE_YOUR_CALM and additional debug data resembling
     "too_many_pings" followed by immediately closing the connection. */
-void grpc_chttp2_add_ping_strike(grpc_exec_ctx* exec_ctx,
-                                 grpc_chttp2_transport* t);
+void grpc_chttp2_add_ping_strike(grpc_chttp2_transport* t);
 
 /** add a ref to the stream and add it to the writable list;
     ref will be dropped in writing.c */
-void grpc_chttp2_mark_stream_writable(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_transport* t,
+void grpc_chttp2_mark_stream_writable(grpc_chttp2_transport* t,
                                       grpc_chttp2_stream* s);
 
-void grpc_chttp2_cancel_stream(grpc_exec_ctx* exec_ctx,
-                               grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+void grpc_chttp2_cancel_stream(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
                                grpc_error* due_to_error);
 
-void grpc_chttp2_maybe_complete_recv_initial_metadata(grpc_exec_ctx* exec_ctx,
-                                                      grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_initial_metadata(grpc_chttp2_transport* t,
                                                       grpc_chttp2_stream* s);
-void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx* exec_ctx,
-                                             grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_message(grpc_chttp2_transport* t,
                                              grpc_chttp2_stream* s);
-void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_exec_ctx* exec_ctx,
-                                                       grpc_chttp2_transport* t,
+void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_chttp2_transport* t,
                                                        grpc_chttp2_stream* s);
 
-void grpc_chttp2_fail_pending_writes(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+void grpc_chttp2_fail_pending_writes(grpc_chttp2_transport* t,
                                      grpc_chttp2_stream* s, grpc_error* error);
 
 /** Set the default keepalive configurations, must only be called at
diff --git a/src/core/ext/transport/chttp2/transport/parsing.cc b/src/core/ext/transport/chttp2/transport/parsing.cc
index 46ec3fb..a56f89c 100644
--- a/src/core/ext/transport/chttp2/transport/parsing.cc
+++ b/src/core/ext/transport/chttp2/transport/parsing.cc
@@ -31,33 +31,22 @@
 #include "src/core/lib/transport/status_conversion.h"
 #include "src/core/lib/transport/timeout_encoding.h"
 
-static grpc_error* init_frame_parser(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t);
-static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
-                                            grpc_chttp2_transport* t,
+static grpc_error* init_frame_parser(grpc_chttp2_transport* t);
+static grpc_error* init_header_frame_parser(grpc_chttp2_transport* t,
                                             int is_continuation);
-static grpc_error* init_data_frame_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t);
-static grpc_error* init_rst_stream_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t);
-static grpc_error* init_settings_frame_parser(grpc_exec_ctx* exec_ctx,
-                                              grpc_chttp2_transport* t);
-static grpc_error* init_window_update_frame_parser(grpc_exec_ctx* exec_ctx,
-                                                   grpc_chttp2_transport* t);
-static grpc_error* init_ping_parser(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t);
-static grpc_error* init_goaway_parser(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_transport* t);
-static grpc_error* init_skip_frame_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t,
+static grpc_error* init_data_frame_parser(grpc_chttp2_transport* t);
+static grpc_error* init_rst_stream_parser(grpc_chttp2_transport* t);
+static grpc_error* init_settings_frame_parser(grpc_chttp2_transport* t);
+static grpc_error* init_window_update_frame_parser(grpc_chttp2_transport* t);
+static grpc_error* init_ping_parser(grpc_chttp2_transport* t);
+static grpc_error* init_goaway_parser(grpc_chttp2_transport* t);
+static grpc_error* init_skip_frame_parser(grpc_chttp2_transport* t,
                                           int is_header);
 
-static grpc_error* parse_frame_slice(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t, grpc_slice slice,
+static grpc_error* parse_frame_slice(grpc_chttp2_transport* t, grpc_slice slice,
                                      int is_last);
 
-grpc_error* grpc_chttp2_perform_read(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t,
+grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
                                      grpc_slice slice) {
   uint8_t* beg = GRPC_SLICE_START_PTR(slice);
   uint8_t* end = GRPC_SLICE_END_PTR(slice);
@@ -182,12 +171,12 @@
       GPR_ASSERT(cur < end);
       t->incoming_stream_id |= ((uint32_t)*cur);
       t->deframe_state = GRPC_DTS_FRAME;
-      err = init_frame_parser(exec_ctx, t);
+      err = init_frame_parser(t);
       if (err != GRPC_ERROR_NONE) {
         return err;
       }
       if (t->incoming_frame_size == 0) {
-        err = parse_frame_slice(exec_ctx, t, grpc_empty_slice(), 1);
+        err = parse_frame_slice(t, grpc_empty_slice(), 1);
         if (err != GRPC_ERROR_NONE) {
           return err;
         }
@@ -217,7 +206,7 @@
       GPR_ASSERT(cur < end);
       if ((uint32_t)(end - cur) == t->incoming_frame_size) {
         err =
-            parse_frame_slice(exec_ctx, t,
+            parse_frame_slice(t,
                               grpc_slice_sub_no_ref(slice, (size_t)(cur - beg),
                                                     (size_t)(end - beg)),
                               1);
@@ -230,7 +219,7 @@
       } else if ((uint32_t)(end - cur) > t->incoming_frame_size) {
         size_t cur_offset = (size_t)(cur - beg);
         err = parse_frame_slice(
-            exec_ctx, t,
+            t,
             grpc_slice_sub_no_ref(slice, cur_offset,
                                   cur_offset + t->incoming_frame_size),
             1);
@@ -242,7 +231,7 @@
         goto dts_fh_0; /* loop */
       } else {
         err =
-            parse_frame_slice(exec_ctx, t,
+            parse_frame_slice(t,
                               grpc_slice_sub_no_ref(slice, (size_t)(cur - beg),
                                                     (size_t)(end - beg)),
                               0);
@@ -258,8 +247,7 @@
   GPR_UNREACHABLE_CODE(return nullptr);
 }
 
-static grpc_error* init_frame_parser(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t) {
+static grpc_error* init_frame_parser(grpc_chttp2_transport* t) {
   if (t->is_first_frame &&
       t->incoming_frame_type != GRPC_CHTTP2_FRAME_SETTINGS) {
     char* msg;
@@ -291,46 +279,43 @@
       gpr_free(msg);
       return err;
     }
-    return init_header_frame_parser(exec_ctx, t, 1);
+    return init_header_frame_parser(t, 1);
   }
   switch (t->incoming_frame_type) {
     case GRPC_CHTTP2_FRAME_DATA:
-      return init_data_frame_parser(exec_ctx, t);
+      return init_data_frame_parser(t);
     case GRPC_CHTTP2_FRAME_HEADER:
-      return init_header_frame_parser(exec_ctx, t, 0);
+      return init_header_frame_parser(t, 0);
     case GRPC_CHTTP2_FRAME_CONTINUATION:
       return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "Unexpected CONTINUATION frame");
     case GRPC_CHTTP2_FRAME_RST_STREAM:
-      return init_rst_stream_parser(exec_ctx, t);
+      return init_rst_stream_parser(t);
     case GRPC_CHTTP2_FRAME_SETTINGS:
-      return init_settings_frame_parser(exec_ctx, t);
+      return init_settings_frame_parser(t);
     case GRPC_CHTTP2_FRAME_WINDOW_UPDATE:
-      return init_window_update_frame_parser(exec_ctx, t);
+      return init_window_update_frame_parser(t);
     case GRPC_CHTTP2_FRAME_PING:
-      return init_ping_parser(exec_ctx, t);
+      return init_ping_parser(t);
     case GRPC_CHTTP2_FRAME_GOAWAY:
-      return init_goaway_parser(exec_ctx, t);
+      return init_goaway_parser(t);
     default:
       if (grpc_http_trace.enabled()) {
         gpr_log(GPR_ERROR, "Unknown frame type %02x", t->incoming_frame_type);
       }
-      return init_skip_frame_parser(exec_ctx, t, 0);
+      return init_skip_frame_parser(t, 0);
   }
 }
 
-static grpc_error* skip_parser(grpc_exec_ctx* exec_ctx, void* parser,
-                               grpc_chttp2_transport* t, grpc_chttp2_stream* s,
-                               grpc_slice slice, int is_last) {
+static grpc_error* skip_parser(void* parser, grpc_chttp2_transport* t,
+                               grpc_chttp2_stream* s, grpc_slice slice,
+                               int is_last) {
   return GRPC_ERROR_NONE;
 }
 
-static void skip_header(grpc_exec_ctx* exec_ctx, void* tp, grpc_mdelem md) {
-  GRPC_MDELEM_UNREF(exec_ctx, md);
-}
+static void skip_header(void* tp, grpc_mdelem md) { GRPC_MDELEM_UNREF(md); }
 
-static grpc_error* init_skip_frame_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t,
+static grpc_error* init_skip_frame_parser(grpc_chttp2_transport* t,
                                           int is_header) {
   if (is_header) {
     uint8_t is_eoh = t->expect_continuation_stream_id != 0;
@@ -346,14 +331,11 @@
   return GRPC_ERROR_NONE;
 }
 
-void grpc_chttp2_parsing_become_skip_parser(grpc_exec_ctx* exec_ctx,
-                                            grpc_chttp2_transport* t) {
-  init_skip_frame_parser(exec_ctx, t,
-                         t->parser == grpc_chttp2_header_parser_parse);
+void grpc_chttp2_parsing_become_skip_parser(grpc_chttp2_transport* t) {
+  init_skip_frame_parser(t, t->parser == grpc_chttp2_header_parser_parse);
 }
 
-static grpc_error* init_data_frame_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t) {
+static grpc_error* init_data_frame_parser(grpc_chttp2_transport* t) {
   grpc_chttp2_stream* s =
       grpc_chttp2_parsing_lookup_stream(t, t->incoming_stream_id);
   grpc_error* err = GRPC_ERROR_NONE;
@@ -365,17 +347,17 @@
     err = s->flow_control->RecvData(t->incoming_frame_size);
     action = s->flow_control->MakeAction();
   }
-  grpc_chttp2_act_on_flowctl_action(exec_ctx, action, t, s);
+  grpc_chttp2_act_on_flowctl_action(action, t, s);
   if (err != GRPC_ERROR_NONE) {
     goto error_handler;
   }
   if (s == nullptr) {
-    return init_skip_frame_parser(exec_ctx, t, 0);
+    return init_skip_frame_parser(t, 0);
   }
   s->received_bytes += t->incoming_frame_size;
   s->stats.incoming.framing_bytes += 9;
   if (err == GRPC_ERROR_NONE && s->read_closed) {
-    return init_skip_frame_parser(exec_ctx, t, 0);
+    return init_skip_frame_parser(t, 0);
   }
   if (err == GRPC_ERROR_NONE) {
     err = grpc_chttp2_data_parser_begin_frame(
@@ -394,13 +376,13 @@
   } else if (grpc_error_get_int(err, GRPC_ERROR_INT_STREAM_ID, nullptr)) {
     /* handle stream errors by closing the stream */
     if (s != nullptr) {
-      grpc_chttp2_mark_stream_closed(exec_ctx, t, s, true, false, err);
+      grpc_chttp2_mark_stream_closed(t, s, true, false, err);
     }
     grpc_slice_buffer_add(
         &t->qbuf, grpc_chttp2_rst_stream_create(t->incoming_stream_id,
                                                 GRPC_HTTP2_PROTOCOL_ERROR,
                                                 &s->stats.outgoing));
-    return init_skip_frame_parser(exec_ctx, t, 0);
+    return init_skip_frame_parser(t, 0);
   } else {
     return err;
   }
@@ -408,8 +390,7 @@
 
 static void free_timeout(void* p) { gpr_free(p); }
 
-static void on_initial_header(grpc_exec_ctx* exec_ctx, void* tp,
-                              grpc_mdelem md) {
+static void on_initial_header(void* tp, grpc_mdelem md) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   grpc_chttp2_stream* s = t->incoming_stream;
 
@@ -455,9 +436,9 @@
     }
     if (timeout != GRPC_MILLIS_INF_FUTURE) {
       grpc_chttp2_incoming_metadata_buffer_set_deadline(
-          &s->metadata_buffer[0], grpc_exec_ctx_now(exec_ctx) + timeout);
+          &s->metadata_buffer[0], grpc_core::ExecCtx::Get()->Now() + timeout);
     }
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   } else {
     const size_t new_size = s->metadata_buffer[0].size + GRPC_MDELEM_LENGTH(md);
     const size_t metadata_size_limit =
@@ -469,22 +450,22 @@
               " vs. %" PRIuPTR ")",
               new_size, metadata_size_limit);
       grpc_chttp2_cancel_stream(
-          exec_ctx, t, s,
+          t, s,
           grpc_error_set_int(
               GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                   "received initial metadata size exceeds limit"),
               GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
-      grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+      grpc_chttp2_parsing_become_skip_parser(t);
       s->seen_error = true;
-      GRPC_MDELEM_UNREF(exec_ctx, md);
+      GRPC_MDELEM_UNREF(md);
     } else {
-      grpc_error* error = grpc_chttp2_incoming_metadata_buffer_add(
-          exec_ctx, &s->metadata_buffer[0], md);
+      grpc_error* error =
+          grpc_chttp2_incoming_metadata_buffer_add(&s->metadata_buffer[0], md);
       if (error != GRPC_ERROR_NONE) {
-        grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
-        grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+        grpc_chttp2_cancel_stream(t, s, error);
+        grpc_chttp2_parsing_become_skip_parser(t);
         s->seen_error = true;
-        GRPC_MDELEM_UNREF(exec_ctx, md);
+        GRPC_MDELEM_UNREF(md);
       }
     }
   }
@@ -492,8 +473,7 @@
   GPR_TIMER_END("on_initial_header", 0);
 }
 
-static void on_trailing_header(grpc_exec_ctx* exec_ctx, void* tp,
-                               grpc_mdelem md) {
+static void on_trailing_header(void* tp, grpc_mdelem md) {
   grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
   grpc_chttp2_stream* s = t->incoming_stream;
 
@@ -527,30 +507,29 @@
             " vs. %" PRIuPTR ")",
             new_size, metadata_size_limit);
     grpc_chttp2_cancel_stream(
-        exec_ctx, t, s,
+        t, s,
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                "received trailing metadata size exceeds limit"),
                            GRPC_ERROR_INT_GRPC_STATUS,
                            GRPC_STATUS_RESOURCE_EXHAUSTED));
-    grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+    grpc_chttp2_parsing_become_skip_parser(t);
     s->seen_error = true;
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   } else {
-    grpc_error* error = grpc_chttp2_incoming_metadata_buffer_add(
-        exec_ctx, &s->metadata_buffer[1], md);
+    grpc_error* error =
+        grpc_chttp2_incoming_metadata_buffer_add(&s->metadata_buffer[1], md);
     if (error != GRPC_ERROR_NONE) {
-      grpc_chttp2_cancel_stream(exec_ctx, t, s, error);
-      grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+      grpc_chttp2_cancel_stream(t, s, error);
+      grpc_chttp2_parsing_become_skip_parser(t);
       s->seen_error = true;
-      GRPC_MDELEM_UNREF(exec_ctx, md);
+      GRPC_MDELEM_UNREF(md);
     }
   }
 
   GPR_TIMER_END("on_trailing_header", 0);
 }
 
-static grpc_error* init_header_frame_parser(grpc_exec_ctx* exec_ctx,
-                                            grpc_chttp2_transport* t,
+static grpc_error* init_header_frame_parser(grpc_chttp2_transport* t,
                                             int is_continuation) {
   uint8_t is_eoh =
       (t->incoming_frame_flags & GRPC_CHTTP2_DATA_FLAG_END_HEADERS) != 0;
@@ -580,7 +559,7 @@
       GRPC_CHTTP2_IF_TRACING(
           gpr_log(GPR_ERROR,
                   "grpc_chttp2_stream disbanded before CONTINUATION received"));
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
     }
     if (t->is_client) {
       if ((t->incoming_stream_id & 1) &&
@@ -590,7 +569,7 @@
         GRPC_CHTTP2_IF_TRACING(gpr_log(
             GPR_ERROR, "ignoring new grpc_chttp2_stream creation on client"));
       }
-      grpc_error* err = init_skip_frame_parser(exec_ctx, t, 1);
+      grpc_error* err = init_skip_frame_parser(t, 1);
       if (t->incoming_frame_flags & GRPC_CHTTP2_FLAG_HAS_PRIORITY) {
         grpc_chttp2_hpack_parser_set_has_priority(&t->hpack_parser);
       }
@@ -602,13 +581,13 @@
           "last grpc_chttp2_stream "
           "id=%d, new grpc_chttp2_stream id=%d",
           t->last_new_stream_id, t->incoming_stream_id));
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
     } else if ((t->incoming_stream_id & 1) == 0) {
       GRPC_CHTTP2_IF_TRACING(gpr_log(
           GPR_ERROR,
           "ignoring grpc_chttp2_stream with non-client generated index %d",
           t->incoming_stream_id));
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
     } else if (grpc_chttp2_stream_map_size(&t->stream_map) >=
                t->settings[GRPC_ACKED_SETTINGS]
                           [GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]) {
@@ -616,11 +595,11 @@
     }
     t->last_new_stream_id = t->incoming_stream_id;
     s = t->incoming_stream =
-        grpc_chttp2_parsing_accept_stream(exec_ctx, t, t->incoming_stream_id);
+        grpc_chttp2_parsing_accept_stream(t, t->incoming_stream_id);
     if (s == nullptr) {
       GRPC_CHTTP2_IF_TRACING(
           gpr_log(GPR_ERROR, "grpc_chttp2_stream not accepted"));
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
     }
   } else {
     t->incoming_stream = s;
@@ -631,7 +610,7 @@
     GRPC_CHTTP2_IF_TRACING(gpr_log(
         GPR_ERROR, "skipping already closed grpc_chttp2_stream header"));
     t->incoming_stream = nullptr;
-    return init_skip_frame_parser(exec_ctx, t, 1);
+    return init_skip_frame_parser(t, 1);
   }
   t->parser = grpc_chttp2_header_parser_parse;
   t->parser_data = &t->hpack_parser;
@@ -656,7 +635,7 @@
       break;
     case 2:
       gpr_log(GPR_ERROR, "too many header frames received");
-      return init_skip_frame_parser(exec_ctx, t, 1);
+      return init_skip_frame_parser(t, 1);
   }
   t->hpack_parser.on_header_user_data = t;
   t->hpack_parser.is_boundary = is_eoh;
@@ -668,8 +647,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_window_update_frame_parser(grpc_exec_ctx* exec_ctx,
-                                                   grpc_chttp2_transport* t) {
+static grpc_error* init_window_update_frame_parser(grpc_chttp2_transport* t) {
   grpc_error* err = grpc_chttp2_window_update_parser_begin_frame(
       &t->simple.window_update, t->incoming_frame_size,
       t->incoming_frame_flags);
@@ -678,7 +656,7 @@
     grpc_chttp2_stream* s = t->incoming_stream =
         grpc_chttp2_parsing_lookup_stream(t, t->incoming_stream_id);
     if (s == nullptr) {
-      return init_skip_frame_parser(exec_ctx, t, 0);
+      return init_skip_frame_parser(t, 0);
     }
     s->stats.incoming.framing_bytes += 9;
   }
@@ -687,8 +665,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_ping_parser(grpc_exec_ctx* exec_ctx,
-                                    grpc_chttp2_transport* t) {
+static grpc_error* init_ping_parser(grpc_chttp2_transport* t) {
   grpc_error* err = grpc_chttp2_ping_parser_begin_frame(
       &t->simple.ping, t->incoming_frame_size, t->incoming_frame_flags);
   if (err != GRPC_ERROR_NONE) return err;
@@ -697,15 +674,14 @@
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_rst_stream_parser(grpc_exec_ctx* exec_ctx,
-                                          grpc_chttp2_transport* t) {
+static grpc_error* init_rst_stream_parser(grpc_chttp2_transport* t) {
   grpc_error* err = grpc_chttp2_rst_stream_parser_begin_frame(
       &t->simple.rst_stream, t->incoming_frame_size, t->incoming_frame_flags);
   if (err != GRPC_ERROR_NONE) return err;
   grpc_chttp2_stream* s = t->incoming_stream =
       grpc_chttp2_parsing_lookup_stream(t, t->incoming_stream_id);
   if (!t->incoming_stream) {
-    return init_skip_frame_parser(exec_ctx, t, 0);
+    return init_skip_frame_parser(t, 0);
   }
   s->stats.incoming.framing_bytes += 9;
   t->parser = grpc_chttp2_rst_stream_parser_parse;
@@ -713,8 +689,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_goaway_parser(grpc_exec_ctx* exec_ctx,
-                                      grpc_chttp2_transport* t) {
+static grpc_error* init_goaway_parser(grpc_chttp2_transport* t) {
   grpc_error* err = grpc_chttp2_goaway_parser_begin_frame(
       &t->goaway_parser, t->incoming_frame_size, t->incoming_frame_flags);
   if (err != GRPC_ERROR_NONE) return err;
@@ -723,8 +698,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* init_settings_frame_parser(grpc_exec_ctx* exec_ctx,
-                                              grpc_chttp2_transport* t) {
+static grpc_error* init_settings_frame_parser(grpc_chttp2_transport* t) {
   if (t->incoming_stream_id != 0) {
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "Settings frame received for grpc_chttp2_stream");
@@ -740,7 +714,7 @@
     memcpy(t->settings[GRPC_ACKED_SETTINGS], t->settings[GRPC_SENT_SETTINGS],
            GRPC_CHTTP2_NUM_SETTINGS * sizeof(uint32_t));
     grpc_chttp2_hptbl_set_max_bytes(
-        exec_ctx, &t->hpack_parser.table,
+        &t->hpack_parser.table,
         t->settings[GRPC_ACKED_SETTINGS]
                    [GRPC_CHTTP2_SETTINGS_HEADER_TABLE_SIZE]);
     t->sent_local_settings = 0;
@@ -750,11 +724,10 @@
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* parse_frame_slice(grpc_exec_ctx* exec_ctx,
-                                     grpc_chttp2_transport* t, grpc_slice slice,
+static grpc_error* parse_frame_slice(grpc_chttp2_transport* t, grpc_slice slice,
                                      int is_last) {
   grpc_chttp2_stream* s = t->incoming_stream;
-  grpc_error* err = t->parser(exec_ctx, t->parser_data, t, s, slice, is_last);
+  grpc_error* err = t->parser(t->parser_data, t, s, slice, is_last);
   if (err == GRPC_ERROR_NONE) {
     return err;
   } else if (grpc_error_get_int(err, GRPC_ERROR_INT_STREAM_ID, nullptr)) {
@@ -762,7 +735,7 @@
       const char* msg = grpc_error_string(err);
       gpr_log(GPR_ERROR, "%s", msg);
     }
-    grpc_chttp2_parsing_become_skip_parser(exec_ctx, t);
+    grpc_chttp2_parsing_become_skip_parser(t);
     if (s) {
       s->forced_close_error = err;
       grpc_slice_buffer_add(
diff --git a/src/core/ext/transport/chttp2/transport/writing.cc b/src/core/ext/transport/chttp2/transport/writing.cc
index 204b5a7..043ca9b 100644
--- a/src/core/ext/transport/chttp2/transport/writing.cc
+++ b/src/core/ext/transport/chttp2/transport/writing.cc
@@ -33,17 +33,15 @@
   *list = cb;
 }
 
-static void finish_write_cb(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                            grpc_chttp2_stream* s, grpc_chttp2_write_cb* cb,
-                            grpc_error* error) {
-  grpc_chttp2_complete_closure_step(exec_ctx, t, s, &cb->closure, error,
+static void finish_write_cb(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                            grpc_chttp2_write_cb* cb, grpc_error* error) {
+  grpc_chttp2_complete_closure_step(t, s, &cb->closure, error,
                                     "finish_write_cb");
   cb->next = t->write_cb_pool;
   t->write_cb_pool = cb;
 }
 
-static void maybe_initiate_ping(grpc_exec_ctx* exec_ctx,
-                                grpc_chttp2_transport* t) {
+static void maybe_initiate_ping(grpc_chttp2_transport* t) {
   grpc_chttp2_ping_queue* pq = &t->ping_queue;
   if (grpc_closure_list_empty(pq->lists[GRPC_CHTTP2_PCL_NEXT])) {
     /* no ping needed: wait */
@@ -68,15 +66,16 @@
     }
     return;
   }
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
+
+  grpc_millis next_allowed_ping_interval =
+      (t->keepalive_permit_without_calls == 0 &&
+       grpc_chttp2_stream_map_size(&t->stream_map) == 0)
+          ? 7200 * GPR_MS_PER_SEC
+          : t->ping_policy.min_sent_ping_interval_without_data;
   grpc_millis next_allowed_ping =
-      t->ping_state.last_ping_sent_time +
-      t->ping_policy.min_sent_ping_interval_without_data;
-  if (t->keepalive_permit_without_calls == 0 &&
-      grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
-    next_allowed_ping =
-        t->ping_recv_state.last_ping_recv_time + 7200 * GPR_MS_PER_SEC;
-  }
+      t->ping_state.last_ping_sent_time + next_allowed_ping_interval;
+
   if (next_allowed_ping > now) {
     /* not enough elapsed time between successive pings */
     if (grpc_http_trace.enabled() || grpc_bdp_estimator_trace.enabled()) {
@@ -89,20 +88,20 @@
     }
     if (!t->ping_state.is_delayed_ping_timer_set) {
       t->ping_state.is_delayed_ping_timer_set = true;
-      grpc_timer_init(exec_ctx, &t->ping_state.delayed_ping_timer,
-                      next_allowed_ping, &t->retry_initiate_ping_locked);
+      grpc_timer_init(&t->ping_state.delayed_ping_timer, next_allowed_ping,
+                      &t->retry_initiate_ping_locked);
     }
     return;
   }
 
   pq->inflight_id = t->ping_ctr;
   t->ping_ctr++;
-  GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pq->lists[GRPC_CHTTP2_PCL_INITIATE]);
+  GRPC_CLOSURE_LIST_SCHED(&pq->lists[GRPC_CHTTP2_PCL_INITIATE]);
   grpc_closure_list_move(&pq->lists[GRPC_CHTTP2_PCL_NEXT],
                          &pq->lists[GRPC_CHTTP2_PCL_INFLIGHT]);
   grpc_slice_buffer_add(&t->outbuf,
                         grpc_chttp2_ping_create(false, pq->inflight_id));
-  GRPC_STATS_INC_HTTP2_PINGS_SENT(exec_ctx);
+  GRPC_STATS_INC_HTTP2_PINGS_SENT();
   t->ping_state.last_ping_sent_time = now;
   if (grpc_http_trace.enabled() || grpc_bdp_estimator_trace.enabled()) {
     gpr_log(GPR_DEBUG, "%s: Ping sent [%p]: %d/%d",
@@ -114,10 +113,9 @@
       (t->ping_state.pings_before_data_required != 0);
 }
 
-static bool update_list(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                        grpc_chttp2_stream* s, int64_t send_bytes,
-                        grpc_chttp2_write_cb** list, int64_t* ctr,
-                        grpc_error* error) {
+static bool update_list(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
+                        int64_t send_bytes, grpc_chttp2_write_cb** list,
+                        int64_t* ctr, grpc_error* error) {
   bool sched_any = false;
   grpc_chttp2_write_cb* cb = *list;
   *list = nullptr;
@@ -126,7 +124,7 @@
     grpc_chttp2_write_cb* next = cb->next;
     if (cb->call_at_byte <= *ctr) {
       sched_any = true;
-      finish_write_cb(exec_ctx, t, s, cb, GRPC_ERROR_REF(error));
+      finish_write_cb(t, s, cb, GRPC_ERROR_REF(error));
     } else {
       add_to_write_list(list, cb);
     }
@@ -179,22 +177,22 @@
 
 class WriteContext {
  public:
-  WriteContext(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t) : t_(t) {
-    GRPC_STATS_INC_HTTP2_WRITES_BEGUN(exec_ctx);
+  WriteContext(grpc_chttp2_transport* t) : t_(t) {
+    GRPC_STATS_INC_HTTP2_WRITES_BEGUN();
     GPR_TIMER_BEGIN("grpc_chttp2_begin_write", 0);
   }
 
   // TODO(ctiller): make this the destructor
-  void FlushStats(grpc_exec_ctx* exec_ctx) {
+  void FlushStats() {
     GRPC_STATS_INC_HTTP2_SEND_INITIAL_METADATA_PER_WRITE(
-        exec_ctx, initial_metadata_writes_);
-    GRPC_STATS_INC_HTTP2_SEND_MESSAGE_PER_WRITE(exec_ctx, message_writes_);
+        initial_metadata_writes_);
+    GRPC_STATS_INC_HTTP2_SEND_MESSAGE_PER_WRITE(message_writes_);
     GRPC_STATS_INC_HTTP2_SEND_TRAILING_METADATA_PER_WRITE(
-        exec_ctx, trailing_metadata_writes_);
-    GRPC_STATS_INC_HTTP2_SEND_FLOWCTL_PER_WRITE(exec_ctx, flow_control_writes_);
+        trailing_metadata_writes_);
+    GRPC_STATS_INC_HTTP2_SEND_FLOWCTL_PER_WRITE(flow_control_writes_);
   }
 
-  void FlushSettings(grpc_exec_ctx* exec_ctx) {
+  void FlushSettings() {
     if (t_->dirtied_local_settings && !t_->sent_local_settings) {
       grpc_slice_buffer_add(
           &t_->outbuf, grpc_chttp2_settings_create(
@@ -204,17 +202,17 @@
       t_->force_send_settings = false;
       t_->dirtied_local_settings = false;
       t_->sent_local_settings = true;
-      GRPC_STATS_INC_HTTP2_SETTINGS_WRITES(exec_ctx);
+      GRPC_STATS_INC_HTTP2_SETTINGS_WRITES();
     }
   }
 
-  void FlushQueuedBuffers(grpc_exec_ctx* exec_ctx) {
+  void FlushQueuedBuffers() {
     /* simple writes are queued to qbuf, and flushed here */
     grpc_slice_buffer_move_into(&t_->qbuf, &t_->outbuf);
     GPR_ASSERT(t_->qbuf.count == 0);
   }
 
-  void FlushWindowUpdates(grpc_exec_ctx* exec_ctx) {
+  void FlushWindowUpdates() {
     uint32_t transport_announce =
         t_->flow_control->MaybeSendUpdate(t_->outbuf.count > 0);
     if (transport_announce) {
@@ -234,7 +232,7 @@
     t_->ping_ack_count = 0;
   }
 
-  void EnactHpackSettings(grpc_exec_ctx* exec_ctx) {
+  void EnactHpackSettings() {
     grpc_chttp2_hpack_compressor_set_max_table_size(
         &t_->hpack_compressor,
         t_->settings[GRPC_PEER_SETTINGS]
@@ -374,8 +372,8 @@
 
   bool is_last_frame() const { return is_last_frame_; }
 
-  void CallCallbacks(grpc_exec_ctx* exec_ctx) {
-    if (update_list(exec_ctx, t_, s_,
+  void CallCallbacks() {
+    if (update_list(t_, s_,
                     (int64_t)(s_->sending_bytes - sending_bytes_before_),
                     &s_->on_flow_controlled_cbs,
                     &s_->flow_controlled_bytes_flowed, GRPC_ERROR_NONE)) {
@@ -403,7 +401,7 @@
                       s->flow_control->announced_window_delta())));
   }
 
-  void FlushInitialMetadata(grpc_exec_ctx* exec_ctx) {
+  void FlushInitialMetadata() {
     /* send initial metadata if it's available */
     if (s_->sent_initial_metadata) return;
     if (s_->send_initial_metadata == nullptr) return;
@@ -430,7 +428,7 @@
                       [GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE],  // max_frame_size
           &s_->stats.outgoing                                 // stats
       };
-      grpc_chttp2_encode_header(exec_ctx, &t_->hpack_compressor, nullptr, 0,
+      grpc_chttp2_encode_header(&t_->hpack_compressor, nullptr, 0,
                                 s_->send_initial_metadata, &hopt, &t_->outbuf);
       write_context_->ResetPingRecvClock();
       write_context_->IncInitialMetadataWrites();
@@ -440,11 +438,11 @@
     s_->sent_initial_metadata = true;
     write_context_->NoteScheduledResults();
     grpc_chttp2_complete_closure_step(
-        exec_ctx, t_, s_, &s_->send_initial_metadata_finished, GRPC_ERROR_NONE,
+        t_, s_, &s_->send_initial_metadata_finished, GRPC_ERROR_NONE,
         "send_initial_metadata_finished");
   }
 
-  void FlushWindowUpdates(grpc_exec_ctx* exec_ctx) {
+  void FlushWindowUpdates() {
     /* send any window updates */
     const uint32_t stream_announce = s_->flow_control->MaybeSendUpdate();
     if (stream_announce == 0) return;
@@ -456,7 +454,7 @@
     write_context_->IncWindowUpdateWrites();
   }
 
-  void FlushData(grpc_exec_ctx* exec_ctx) {
+  void FlushData() {
     if (!s_->sent_initial_metadata) return;
 
     if (s_->flow_controlled_buffer.length == 0 &&
@@ -488,9 +486,9 @@
     }
     write_context_->ResetPingRecvClock();
     if (data_send_context.is_last_frame()) {
-      SentLastFrame(exec_ctx);
+      SentLastFrame();
     }
-    data_send_context.CallCallbacks(exec_ctx);
+    data_send_context.CallCallbacks();
     stream_became_writable_ = true;
     if (s_->flow_controlled_buffer.length > 0 ||
         s_->compressed_data_buffer.length > 0) {
@@ -500,7 +498,7 @@
     write_context_->IncMessageWrites();
   }
 
-  void FlushTrailingMetadata(grpc_exec_ctx* exec_ctx) {
+  void FlushTrailingMetadata() {
     if (!s_->sent_initial_metadata) return;
 
     if (s_->send_trailing_metadata == nullptr) return;
@@ -521,18 +519,18 @@
 
           t_->settings[GRPC_PEER_SETTINGS][GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE],
           &s_->stats.outgoing};
-      grpc_chttp2_encode_header(exec_ctx, &t_->hpack_compressor,
+      grpc_chttp2_encode_header(&t_->hpack_compressor,
                                 extra_headers_for_trailing_metadata_,
                                 num_extra_headers_for_trailing_metadata_,
                                 s_->send_trailing_metadata, &hopt, &t_->outbuf);
     }
     write_context_->IncTrailingMetadataWrites();
     write_context_->ResetPingRecvClock();
-    SentLastFrame(exec_ctx);
+    SentLastFrame();
 
     write_context_->NoteScheduledResults();
     grpc_chttp2_complete_closure_step(
-        exec_ctx, t_, s_, &s_->send_trailing_metadata_finished, GRPC_ERROR_NONE,
+        t_, s_, &s_->send_trailing_metadata_finished, GRPC_ERROR_NONE,
         "send_trailing_metadata_finished");
   }
 
@@ -556,7 +554,7 @@
     }
   }
 
-  void SentLastFrame(grpc_exec_ctx* exec_ctx) {
+  void SentLastFrame() {
     s_->send_trailing_metadata = nullptr;
     s_->sent_trailing_metadata = true;
 
@@ -565,7 +563,7 @@
           &t_->outbuf, grpc_chttp2_rst_stream_create(
                            s_->id, GRPC_HTTP2_NO_ERROR, &s_->stats.outgoing));
     }
-    grpc_chttp2_mark_stream_closed(exec_ctx, t_, s_, !t_->is_client, true,
+    grpc_chttp2_mark_stream_closed(t_, s_, !t_->is_client, true,
                                    GRPC_ERROR_NONE);
   }
 
@@ -579,12 +577,12 @@
 }  // namespace
 
 grpc_chttp2_begin_write_result grpc_chttp2_begin_write(
-    grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t) {
-  WriteContext ctx(exec_ctx, t);
-  ctx.FlushSettings(exec_ctx);
+    grpc_chttp2_transport* t) {
+  WriteContext ctx(t);
+  ctx.FlushSettings();
   ctx.FlushPingAcks();
-  ctx.FlushQueuedBuffers(exec_ctx);
-  ctx.EnactHpackSettings(exec_ctx);
+  ctx.FlushQueuedBuffers();
+  ctx.EnactHpackSettings();
 
   if (t->flow_control->remote_window() > 0) {
     ctx.UpdateStreamsNoLongerStalled();
@@ -594,47 +592,45 @@
      (according to available window sizes) and add to the output buffer */
   while (grpc_chttp2_stream* s = ctx.NextStream()) {
     StreamWriteContext stream_ctx(&ctx, s);
-    stream_ctx.FlushInitialMetadata(exec_ctx);
-    stream_ctx.FlushWindowUpdates(exec_ctx);
-    stream_ctx.FlushData(exec_ctx);
-    stream_ctx.FlushTrailingMetadata(exec_ctx);
+    stream_ctx.FlushInitialMetadata();
+    stream_ctx.FlushWindowUpdates();
+    stream_ctx.FlushData();
+    stream_ctx.FlushTrailingMetadata();
 
     if (stream_ctx.stream_became_writable()) {
       if (!grpc_chttp2_list_add_writing_stream(t, s)) {
         /* already in writing list: drop ref */
-        GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:already_writing");
+        GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:already_writing");
       } else {
         /* ref will be dropped at end of write */
       }
     } else {
-      GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:no_write");
+      GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:no_write");
     }
   }
 
-  ctx.FlushWindowUpdates(exec_ctx);
+  ctx.FlushWindowUpdates();
 
-  maybe_initiate_ping(exec_ctx, t);
+  maybe_initiate_ping(t);
 
   GPR_TIMER_END("grpc_chttp2_begin_write", 0);
 
   return ctx.Result();
 }
 
-void grpc_chttp2_end_write(grpc_exec_ctx* exec_ctx, grpc_chttp2_transport* t,
-                           grpc_error* error) {
+void grpc_chttp2_end_write(grpc_chttp2_transport* t, grpc_error* error) {
   GPR_TIMER_BEGIN("grpc_chttp2_end_write", 0);
   grpc_chttp2_stream* s;
 
   while (grpc_chttp2_list_pop_writing_stream(t, &s)) {
     if (s->sending_bytes != 0) {
-      update_list(exec_ctx, t, s, (int64_t)s->sending_bytes,
-                  &s->on_write_finished_cbs, &s->flow_controlled_bytes_written,
-                  GRPC_ERROR_REF(error));
+      update_list(t, s, (int64_t)s->sending_bytes, &s->on_write_finished_cbs,
+                  &s->flow_controlled_bytes_written, GRPC_ERROR_REF(error));
       s->sending_bytes = 0;
     }
-    GRPC_CHTTP2_STREAM_UNREF(exec_ctx, s, "chttp2_writing:end");
+    GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:end");
   }
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &t->outbuf);
+  grpc_slice_buffer_reset_and_unref_internal(&t->outbuf);
   GRPC_ERROR_UNREF(error);
   GPR_TIMER_END("grpc_chttp2_end_write", 0);
 }
diff --git a/src/core/ext/transport/cronet/client/secure/cronet_channel_create.cc b/src/core/ext/transport/cronet/client/secure/cronet_channel_create.cc
index d590ba0..40a30e4 100644
--- a/src/core/ext/transport/cronet/client/secure/cronet_channel_create.cc
+++ b/src/core/ext/transport/cronet/client/secure/cronet_channel_create.cc
@@ -49,7 +49,6 @@
   grpc_transport* ct =
       grpc_create_cronet_transport(engine, target, args, reserved);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  return grpc_channel_create(&exec_ctx, target, args,
-                             GRPC_CLIENT_DIRECT_CHANNEL, ct);
+  grpc_core::ExecCtx exec_ctx;
+  return grpc_channel_create(target, args, GRPC_CLIENT_DIRECT_CHANNEL, ct);
 }
diff --git a/src/core/ext/transport/cronet/transport/cronet_transport.cc b/src/core/ext/transport/cronet/transport/cronet_transport.cc
index 4d24efe..5723da5 100644
--- a/src/core/ext/transport/cronet/transport/cronet_transport.cc
+++ b/src/core/ext/transport/cronet/transport/cronet_transport.cc
@@ -197,27 +197,23 @@
 #ifndef NDEBUG
 #define GRPC_CRONET_STREAM_REF(stream, reason) \
   grpc_cronet_stream_ref((stream), (reason))
-#define GRPC_CRONET_STREAM_UNREF(exec_ctx, stream, reason) \
-  grpc_cronet_stream_unref((exec_ctx), (stream), (reason))
+#define GRPC_CRONET_STREAM_UNREF(stream, reason) \
+  grpc_cronet_stream_unref((stream), (reason))
 void grpc_cronet_stream_ref(stream_obj* s, const char* reason) {
   grpc_stream_ref(s->refcount, reason);
 }
-void grpc_cronet_stream_unref(grpc_exec_ctx* exec_ctx, stream_obj* s,
-                              const char* reason) {
-  grpc_stream_unref(exec_ctx, s->refcount, reason);
+void grpc_cronet_stream_unref(stream_obj* s, const char* reason) {
+  grpc_stream_unref(s->refcount, reason);
 }
 #else
 #define GRPC_CRONET_STREAM_REF(stream, reason) grpc_cronet_stream_ref((stream))
-#define GRPC_CRONET_STREAM_UNREF(exec_ctx, stream, reason) \
-  grpc_cronet_stream_unref((exec_ctx), (stream))
+#define GRPC_CRONET_STREAM_UNREF(stream, reason) \
+  grpc_cronet_stream_unref((stream))
 void grpc_cronet_stream_ref(stream_obj* s) { grpc_stream_ref(s->refcount); }
-void grpc_cronet_stream_unref(grpc_exec_ctx* exec_ctx, stream_obj* s) {
-  grpc_stream_unref(exec_ctx, s->refcount);
-}
+void grpc_cronet_stream_unref(stream_obj* s) { grpc_stream_unref(s->refcount); }
 #endif
 
-static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
-                                          struct op_and_state* oas);
+static enum e_op_result execute_stream_op(struct op_and_state* oas);
 
 /*
   Utility function to translate enum into string for printing
@@ -373,12 +369,12 @@
   This can get executed from the Cronet network thread via cronet callback
   or on the application supplied thread via the perform_stream_op function.
 */
-static void execute_from_storage(grpc_exec_ctx* exec_ctx, stream_obj* s) {
+static void execute_from_storage(stream_obj* s) {
   gpr_mu_lock(&s->mu);
   for (struct op_and_state* curr = s->storage.head; curr != nullptr;) {
     CRONET_LOG(GPR_DEBUG, "calling op at %p. done = %d", curr, curr->done);
     GPR_ASSERT(curr->done == 0);
-    enum e_op_result result = execute_stream_op(exec_ctx, curr);
+    enum e_op_result result = execute_stream_op(curr);
     CRONET_LOG(GPR_DEBUG, "execute_stream_op[%p] returns %s", curr,
                op_result_string(result));
     /* if this op is done, then remove it and free memory */
@@ -401,8 +397,8 @@
   Cronet callback
 */
 static void on_failed(bidirectional_stream* stream, int net_error) {
-  CRONET_LOG(GPR_DEBUG, "on_failed(%p, %d)", stream, net_error);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  gpr_log(GPR_ERROR, "on_failed(%p, %d)", stream, net_error);
+  grpc_core::ExecCtx exec_ctx;
 
   stream_obj* s = (stream_obj*)stream->annotation;
   gpr_mu_lock(&s->mu);
@@ -419,9 +415,8 @@
   }
   null_and_maybe_free_read_buffer(s);
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  GRPC_CRONET_STREAM_UNREF(&exec_ctx, s, "cronet transport");
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
+  GRPC_CRONET_STREAM_UNREF(s, "cronet transport");
 }
 
 /*
@@ -429,7 +424,7 @@
 */
 static void on_canceled(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "on_canceled(%p)", stream);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   stream_obj* s = (stream_obj*)stream->annotation;
   gpr_mu_lock(&s->mu);
@@ -446,9 +441,8 @@
   }
   null_and_maybe_free_read_buffer(s);
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  GRPC_CRONET_STREAM_UNREF(&exec_ctx, s, "cronet transport");
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
+  GRPC_CRONET_STREAM_UNREF(s, "cronet transport");
 }
 
 /*
@@ -456,7 +450,7 @@
 */
 static void on_succeeded(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "on_succeeded(%p)", stream);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   stream_obj* s = (stream_obj*)stream->annotation;
   gpr_mu_lock(&s->mu);
@@ -465,9 +459,8 @@
   s->cbs = nullptr;
   null_and_maybe_free_read_buffer(s);
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  GRPC_CRONET_STREAM_UNREF(&exec_ctx, s, "cronet transport");
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
+  GRPC_CRONET_STREAM_UNREF(s, "cronet transport");
 }
 
 /*
@@ -475,7 +468,7 @@
 */
 static void on_stream_ready(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "W: on_stream_ready(%p)", stream);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   stream_obj* s = (stream_obj*)stream->annotation;
   grpc_cronet_transport* t = (grpc_cronet_transport*)s->curr_ct;
   gpr_mu_lock(&s->mu);
@@ -495,8 +488,7 @@
     }
   }
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
 }
 
 /*
@@ -506,7 +498,7 @@
     bidirectional_stream* stream,
     const bidirectional_stream_header_array* headers,
     const char* negotiated_protocol) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   CRONET_LOG(GPR_DEBUG, "R: on_response_headers_received(%p, %p, %s)", stream,
              headers, negotiated_protocol);
   stream_obj* s = (stream_obj*)stream->annotation;
@@ -528,9 +520,8 @@
   for (size_t i = 0; i < headers->count; i++) {
     GRPC_LOG_IF_ERROR("on_response_headers_received",
                       grpc_chttp2_incoming_metadata_buffer_add(
-                          &exec_ctx, &s->state.rs.initial_metadata,
+                          &s->state.rs.initial_metadata,
                           grpc_mdelem_from_slices(
-                              &exec_ctx,
                               grpc_slice_intern(grpc_slice_from_static_string(
                                   headers->headers[i].key)),
                               grpc_slice_intern(grpc_slice_from_static_string(
@@ -552,15 +543,14 @@
     s->state.pending_read_from_cronet = true;
   }
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
 }
 
 /*
   Cronet callback
 */
 static void on_write_completed(bidirectional_stream* stream, const char* data) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   stream_obj* s = (stream_obj*)stream->annotation;
   CRONET_LOG(GPR_DEBUG, "W: on_write_completed(%p, %s)", stream, data);
   gpr_mu_lock(&s->mu);
@@ -570,8 +560,7 @@
   }
   s->state.state_callback_received[OP_SEND_MESSAGE] = true;
   gpr_mu_unlock(&s->mu);
-  execute_from_storage(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  execute_from_storage(s);
 }
 
 /*
@@ -579,7 +568,7 @@
 */
 static void on_read_completed(bidirectional_stream* stream, char* data,
                               int count) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   stream_obj* s = (stream_obj*)stream->annotation;
   CRONET_LOG(GPR_DEBUG, "R: on_read_completed(%p, %p, %d)", stream, data,
              count);
@@ -605,15 +594,14 @@
       gpr_mu_unlock(&s->mu);
     } else {
       gpr_mu_unlock(&s->mu);
-      execute_from_storage(&exec_ctx, s);
+      execute_from_storage(s);
     }
   } else {
     null_and_maybe_free_read_buffer(s);
     s->state.rs.read_stream_closed = true;
     gpr_mu_unlock(&s->mu);
-    execute_from_storage(&exec_ctx, s);
+    execute_from_storage(s);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /*
@@ -622,7 +610,7 @@
 static void on_response_trailers_received(
     bidirectional_stream* stream,
     const bidirectional_stream_header_array* trailers) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   CRONET_LOG(GPR_DEBUG, "R: on_response_trailers_received(%p,%p)", stream,
              trailers);
   stream_obj* s = (stream_obj*)stream->annotation;
@@ -638,9 +626,8 @@
                trailers->headers[i].value);
     GRPC_LOG_IF_ERROR("on_response_trailers_received",
                       grpc_chttp2_incoming_metadata_buffer_add(
-                          &exec_ctx, &s->state.rs.trailing_metadata,
+                          &s->state.rs.trailing_metadata,
                           grpc_mdelem_from_slices(
-                              &exec_ctx,
                               grpc_slice_intern(grpc_slice_from_static_string(
                                   trailers->headers[i].key)),
                               grpc_slice_intern(grpc_slice_from_static_string(
@@ -670,17 +657,15 @@
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    execute_from_storage(&exec_ctx, s);
+    execute_from_storage(s);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /*
  Utility function that takes the data from s->write_slice_buffer and assembles
  into a contiguous byte stream with 5 byte gRPC header prepended.
 */
-static void create_grpc_frame(grpc_exec_ctx* exec_ctx,
-                              grpc_slice_buffer* write_slice_buffer,
+static void create_grpc_frame(grpc_slice_buffer* write_slice_buffer,
                               char** pp_write_buffer,
                               size_t* p_write_buffer_size, uint32_t flags) {
   grpc_slice slice = grpc_slice_buffer_take_first(write_slice_buffer);
@@ -700,7 +685,7 @@
   *p++ = (uint8_t)(length);
   /* append actual data */
   memcpy(p, GRPC_SLICE_START_PTR(slice), length);
-  grpc_slice_unref_internal(exec_ctx, slice);
+  grpc_slice_unref_internal(slice);
 }
 
 /*
@@ -981,8 +966,7 @@
 /*
   TODO (makdharma): Break down this function in smaller chunks for readability.
 */
-static enum e_op_result execute_stream_op(grpc_exec_ctx* exec_ctx,
-                                          struct op_and_state* oas) {
+static enum e_op_result execute_stream_op(struct op_and_state* oas) {
   grpc_transport_stream_op_batch* stream_op = &oas->op;
   struct stream_obj* s = oas->s;
   grpc_cronet_transport* t = (grpc_cronet_transport*)s->curr_ct;
@@ -1040,15 +1024,14 @@
       grpc_slice slice;
       grpc_slice_buffer_init(&write_slice_buffer);
       if (1 != grpc_byte_stream_next(
-                   exec_ctx, stream_op->payload->send_message.send_message,
+                   stream_op->payload->send_message.send_message,
                    stream_op->payload->send_message.send_message->length,
                    nullptr)) {
         /* Should never reach here */
         GPR_ASSERT(false);
       }
       if (GRPC_ERROR_NONE !=
-          grpc_byte_stream_pull(exec_ctx,
-                                stream_op->payload->send_message.send_message,
+          grpc_byte_stream_pull(stream_op->payload->send_message.send_message,
                                 &slice)) {
         /* Should never reach here */
         GPR_ASSERT(false);
@@ -1061,15 +1044,15 @@
       }
       if (write_slice_buffer.count > 0) {
         size_t write_buffer_size;
-        create_grpc_frame(exec_ctx, &write_slice_buffer,
-                          &stream_state->ws.write_buffer, &write_buffer_size,
+        create_grpc_frame(&write_slice_buffer, &stream_state->ws.write_buffer,
+                          &write_buffer_size,
                           stream_op->payload->send_message.send_message->flags);
         CRONET_LOG(GPR_DEBUG, "bidirectional_stream_write (%p, %p)", s->cbs,
                    stream_state->ws.write_buffer);
         stream_state->state_callback_received[OP_SEND_MESSAGE] = false;
         bidirectional_stream_write(s->cbs, stream_state->ws.write_buffer,
                                    (int)write_buffer_size, false);
-        grpc_slice_buffer_destroy_internal(exec_ctx, &write_slice_buffer);
+        grpc_slice_buffer_destroy_internal(&write_slice_buffer);
         if (t->use_packet_coalescing) {
           if (!stream_op->send_trailing_metadata) {
             CRONET_LOG(GPR_DEBUG, "bidirectional_stream_flush (%p)", s->cbs);
@@ -1112,25 +1095,21 @@
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_INITIAL_METADATA", oas);
     if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_NONE);
     } else if (stream_state->state_callback_received[OP_FAILED]) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_NONE);
     } else if (stream_state->state_op_done[OP_RECV_TRAILING_METADATA]) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_NONE);
     } else {
       grpc_chttp2_incoming_metadata_buffer_publish(
-          exec_ctx, &oas->s->state.rs.initial_metadata,
+          &oas->s->state.rs.initial_metadata,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata);
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           stream_op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_NONE);
     }
@@ -1141,16 +1120,14 @@
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_MESSAGE", oas);
     if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
       CRONET_LOG(GPR_DEBUG, "Stream is cancelled.");
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
       result = ACTION_TAKEN_NO_CALLBACK;
     } else if (stream_state->state_callback_received[OP_FAILED]) {
       CRONET_LOG(GPR_DEBUG, "Stream failed.");
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
@@ -1158,16 +1135,14 @@
     } else if (stream_state->rs.read_stream_closed == true) {
       /* No more data will be received */
       CRONET_LOG(GPR_DEBUG, "read stream closed");
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
       result = ACTION_TAKEN_NO_CALLBACK;
     } else if (stream_state->flush_read) {
       CRONET_LOG(GPR_DEBUG, "flush read");
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
@@ -1200,7 +1175,7 @@
           CRONET_LOG(GPR_DEBUG, "read operation complete. Empty response.");
           /* Clean up read_slice_buffer in case there is unread data. */
           grpc_slice_buffer_destroy_internal(
-              exec_ctx, &stream_state->rs.read_slice_buffer);
+              &stream_state->rs.read_slice_buffer);
           grpc_slice_buffer_init(&stream_state->rs.read_slice_buffer);
           grpc_slice_buffer_stream_init(&stream_state->rs.sbs,
                                         &stream_state->rs.read_slice_buffer, 0);
@@ -1210,7 +1185,7 @@
           *((grpc_byte_buffer**)stream_op->payload->recv_message.recv_message) =
               (grpc_byte_buffer*)&stream_state->rs.sbs;
           GRPC_CLOSURE_SCHED(
-              exec_ctx, stream_op->payload->recv_message.recv_message_ready,
+              stream_op->payload->recv_message.recv_message_ready,
               GRPC_ERROR_NONE);
           stream_state->state_op_done[OP_RECV_MESSAGE] = true;
           oas->state.state_op_done[OP_RECV_MESSAGE] = true;
@@ -1254,8 +1229,7 @@
              (size_t)stream_state->rs.length_field);
       null_and_maybe_free_read_buffer(s);
       /* Clean up read_slice_buffer in case there is unread data. */
-      grpc_slice_buffer_destroy_internal(exec_ctx,
-                                         &stream_state->rs.read_slice_buffer);
+      grpc_slice_buffer_destroy_internal(&stream_state->rs.read_slice_buffer);
       grpc_slice_buffer_init(&stream_state->rs.read_slice_buffer);
       grpc_slice_buffer_add(&stream_state->rs.read_slice_buffer,
                             read_data_slice);
@@ -1266,8 +1240,7 @@
       }
       *((grpc_byte_buffer**)stream_op->payload->recv_message.recv_message) =
           (grpc_byte_buffer*)&stream_state->rs.sbs;
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         stream_op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
       oas->state.state_op_done[OP_RECV_MESSAGE] = true;
@@ -1290,7 +1263,7 @@
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_RECV_TRAILING_METADATA", oas);
     if (oas->s->state.rs.trailing_metadata_valid) {
       grpc_chttp2_incoming_metadata_buffer_publish(
-          exec_ctx, &oas->s->state.rs.trailing_metadata,
+          &oas->s->state.rs.trailing_metadata,
           stream_op->payload->recv_trailing_metadata.recv_trailing_metadata);
       stream_state->rs.trailing_metadata_valid = false;
     }
@@ -1315,17 +1288,17 @@
              op_can_be_run(stream_op, s, &oas->state, OP_ON_COMPLETE)) {
     CRONET_LOG(GPR_DEBUG, "running: %p  OP_ON_COMPLETE", oas);
     if (stream_state->state_op_done[OP_CANCEL_ERROR]) {
-      GRPC_CLOSURE_SCHED(exec_ctx, stream_op->on_complete,
+      GRPC_CLOSURE_SCHED(stream_op->on_complete,
                          GRPC_ERROR_REF(stream_state->cancel_error));
     } else if (stream_state->state_callback_received[OP_FAILED]) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx, stream_op->on_complete,
+          stream_op->on_complete,
           make_error_with_desc(GRPC_STATUS_UNAVAILABLE, "Unavailable."));
     } else {
       /* All actions in this stream_op are complete. Call the on_complete
        * callback
        */
-      GRPC_CLOSURE_SCHED(exec_ctx, stream_op->on_complete, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(stream_op->on_complete, GRPC_ERROR_NONE);
     }
     oas->state.state_op_done[OP_ON_COMPLETE] = true;
     oas->done = true;
@@ -1350,9 +1323,9 @@
   Functions used by upper layers to access transport functionality.
 */
 
-static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                       grpc_stream* gs, grpc_stream_refcount* refcount,
-                       const void* server_data, gpr_arena* arena) {
+static int init_stream(grpc_transport* gt, grpc_stream* gs,
+                       grpc_stream_refcount* refcount, const void* server_data,
+                       gpr_arena* arena) {
   stream_obj* s = (stream_obj*)gs;
 
   s->refcount = refcount;
@@ -1383,15 +1356,13 @@
   return 0;
 }
 
-static void set_pollset_do_nothing(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                                   grpc_stream* gs, grpc_pollset* pollset) {}
+static void set_pollset_do_nothing(grpc_transport* gt, grpc_stream* gs,
+                                   grpc_pollset* pollset) {}
 
-static void set_pollset_set_do_nothing(grpc_exec_ctx* exec_ctx,
-                                       grpc_transport* gt, grpc_stream* gs,
+static void set_pollset_set_do_nothing(grpc_transport* gt, grpc_stream* gs,
                                        grpc_pollset_set* pollset_set) {}
 
-static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                              grpc_stream* gs,
+static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
                               grpc_transport_stream_op_batch* op) {
   CRONET_LOG(GPR_DEBUG, "perform_stream_op");
   if (op->send_initial_metadata &&
@@ -1401,42 +1372,36 @@
      this field is present in metadata */
     if (op->recv_initial_metadata) {
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           op->payload->recv_initial_metadata.recv_initial_metadata_ready,
           GRPC_ERROR_CANCELLED);
     }
     if (op->recv_message) {
-      GRPC_CLOSURE_SCHED(exec_ctx, op->payload->recv_message.recv_message_ready,
+      GRPC_CLOSURE_SCHED(op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_CANCELLED);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_complete, GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_CANCELLED);
     return;
   }
   stream_obj* s = (stream_obj*)gs;
   add_to_storage(s, op);
-  execute_from_storage(exec_ctx, s);
+  execute_from_storage(s);
 }
 
-static void destroy_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                           grpc_stream* gs,
+static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
   stream_obj* s = (stream_obj*)gs;
   null_and_maybe_free_read_buffer(s);
   /* Clean up read_slice_buffer in case there is unread data. */
-  grpc_slice_buffer_destroy_internal(exec_ctx, &s->state.rs.read_slice_buffer);
+  grpc_slice_buffer_destroy_internal(&s->state.rs.read_slice_buffer);
   GRPC_ERROR_UNREF(s->state.cancel_error);
-  GRPC_CLOSURE_SCHED(exec_ctx, then_schedule_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(then_schedule_closure, GRPC_ERROR_NONE);
 }
 
-static void destroy_transport(grpc_exec_ctx* exec_ctx, grpc_transport* gt) {}
+static void destroy_transport(grpc_transport* gt) {}
 
-static grpc_endpoint* get_endpoint(grpc_exec_ctx* exec_ctx,
-                                   grpc_transport* gt) {
-  return nullptr;
-}
+static grpc_endpoint* get_endpoint(grpc_transport* gt) { return nullptr; }
 
-static void perform_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                       grpc_transport_op* op) {}
+static void perform_op(grpc_transport* gt, grpc_transport_op* op) {}
 
 static const grpc_transport_vtable grpc_cronet_vtable = {
     sizeof(stream_obj),
diff --git a/src/core/ext/transport/inproc/inproc_transport.cc b/src/core/ext/transport/inproc/inproc_transport.cc
index 2579060..8dd0b7d 100644
--- a/src/core/ext/transport/inproc/inproc_transport.cc
+++ b/src/core/ext/transport/inproc/inproc_transport.cc
@@ -54,8 +54,8 @@
   gpr_refcount refs;
   bool is_client;
   grpc_connectivity_state_tracker connectivity;
-  void (*accept_stream_cb)(grpc_exec_ctx* exec_ctx, void* user_data,
-                           grpc_transport* transport, const void* server_data);
+  void (*accept_stream_cb)(void* user_data, grpc_transport* transport,
+                           const void* server_data);
   void* accept_stream_data;
   bool is_closed;
   struct inproc_transport* other_side;
@@ -118,39 +118,36 @@
 } inproc_stream;
 
 static grpc_closure do_nothing_closure;
-static bool cancel_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                                 grpc_error* error);
-static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error);
+static bool cancel_stream_locked(inproc_stream* s, grpc_error* error);
+static void op_state_machine(void* arg, grpc_error* error);
 
 static void ref_transport(inproc_transport* t) {
   INPROC_LOG(GPR_DEBUG, "ref_transport %p", t);
   gpr_ref(&t->refs);
 }
 
-static void really_destroy_transport(grpc_exec_ctx* exec_ctx,
-                                     inproc_transport* t) {
+static void really_destroy_transport(inproc_transport* t) {
   INPROC_LOG(GPR_DEBUG, "really_destroy_transport %p", t);
-  grpc_connectivity_state_destroy(exec_ctx, &t->connectivity);
+  grpc_connectivity_state_destroy(&t->connectivity);
   if (gpr_unref(&t->mu->refs)) {
     gpr_free(t->mu);
   }
   gpr_free(t);
 }
 
-static void unref_transport(grpc_exec_ctx* exec_ctx, inproc_transport* t) {
+static void unref_transport(inproc_transport* t) {
   INPROC_LOG(GPR_DEBUG, "unref_transport %p", t);
   if (gpr_unref(&t->refs)) {
-    really_destroy_transport(exec_ctx, t);
+    really_destroy_transport(t);
   }
 }
 
 #ifndef NDEBUG
 #define STREAM_REF(refs, reason) grpc_stream_ref(refs, reason)
-#define STREAM_UNREF(e, refs, reason) grpc_stream_unref(e, refs, reason)
+#define STREAM_UNREF(refs, reason) grpc_stream_unref(refs, reason)
 #else
 #define STREAM_REF(refs, reason) grpc_stream_ref(refs)
-#define STREAM_UNREF(e, refs, reason) grpc_stream_unref(e, refs)
+#define STREAM_UNREF(refs, reason) grpc_stream_unref(refs)
 #endif
 
 static void ref_stream(inproc_stream* s, const char* reason) {
@@ -158,13 +155,12 @@
   STREAM_REF(s->refs, reason);
 }
 
-static void unref_stream(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                         const char* reason) {
+static void unref_stream(inproc_stream* s, const char* reason) {
   INPROC_LOG(GPR_DEBUG, "unref_stream %p %s", s, reason);
-  STREAM_UNREF(exec_ctx, s->refs, reason);
+  STREAM_UNREF(s->refs, reason);
 }
 
-static void really_destroy_stream(grpc_exec_ctx* exec_ctx, inproc_stream* s) {
+static void really_destroy_stream(inproc_stream* s) {
   INPROC_LOG(GPR_DEBUG, "really_destroy_stream %p", s);
 
   GRPC_ERROR_UNREF(s->write_buffer_cancel_error);
@@ -172,13 +168,13 @@
   GRPC_ERROR_UNREF(s->cancel_other_error);
 
   if (s->recv_inited) {
-    grpc_slice_buffer_destroy_internal(exec_ctx, &s->recv_message);
+    grpc_slice_buffer_destroy_internal(&s->recv_message);
   }
 
-  unref_transport(exec_ctx, s->t);
+  unref_transport(s->t);
 
   if (s->closure_at_destroy) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->closure_at_destroy, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->closure_at_destroy, GRPC_ERROR_NONE);
   }
 }
 
@@ -195,7 +191,7 @@
   }
 }
 
-static grpc_error* fill_in_metadata(grpc_exec_ctx* exec_ctx, inproc_stream* s,
+static grpc_error* fill_in_metadata(inproc_stream* s,
                                     const grpc_metadata_batch* metadata,
                                     uint32_t flags, grpc_metadata_batch* out_md,
                                     uint32_t* outflags, bool* markfilled) {
@@ -214,18 +210,18 @@
        (elem != nullptr) && (error == GRPC_ERROR_NONE); elem = elem->next) {
     grpc_linked_mdelem* nelem =
         (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*nelem));
-    nelem->md = grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(GRPC_MDKEY(elem->md)),
-        grpc_slice_intern(GRPC_MDVALUE(elem->md)));
+    nelem->md =
+        grpc_mdelem_from_slices(grpc_slice_intern(GRPC_MDKEY(elem->md)),
+                                grpc_slice_intern(GRPC_MDVALUE(elem->md)));
 
-    error = grpc_metadata_batch_link_tail(exec_ctx, out_md, nelem);
+    error = grpc_metadata_batch_link_tail(out_md, nelem);
   }
   return error;
 }
 
-static int init_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                       grpc_stream* gs, grpc_stream_refcount* refcount,
-                       const void* server_data, gpr_arena* arena) {
+static int init_stream(grpc_transport* gt, grpc_stream* gs,
+                       grpc_stream_refcount* refcount, const void* server_data,
+                       gpr_arena* arena) {
   INPROC_LOG(GPR_DEBUG, "init_stream %p %p %p", gt, gs, server_data);
   inproc_transport* t = (inproc_transport*)gt;
   inproc_stream* s = (inproc_stream*)gs;
@@ -285,8 +281,7 @@
                                               // side to avoid destruction
     INPROC_LOG(GPR_DEBUG, "calling accept stream cb %p %p",
                st->accept_stream_cb, st->accept_stream_data);
-    (*st->accept_stream_cb)(exec_ctx, st->accept_stream_data, &st->base,
-                            (void*)s);
+    (*st->accept_stream_cb)(st->accept_stream_data, &st->base, (void*)s);
   } else {
     // This is the server-side and is being called through accept_stream_cb
     inproc_stream* cs = (inproc_stream*)server_data;
@@ -301,19 +296,19 @@
     // Now transfer from the other side's write_buffer if any to the to_read
     // buffer
     if (cs->write_buffer_initial_md_filled) {
-      fill_in_metadata(exec_ctx, s, &cs->write_buffer_initial_md,
+      fill_in_metadata(s, &cs->write_buffer_initial_md,
                        cs->write_buffer_initial_md_flags,
                        &s->to_read_initial_md, &s->to_read_initial_md_flags,
                        &s->to_read_initial_md_filled);
       s->deadline = GPR_MIN(s->deadline, cs->write_buffer_deadline);
-      grpc_metadata_batch_clear(exec_ctx, &cs->write_buffer_initial_md);
+      grpc_metadata_batch_clear(&cs->write_buffer_initial_md);
       cs->write_buffer_initial_md_filled = false;
     }
     if (cs->write_buffer_trailing_md_filled) {
-      fill_in_metadata(exec_ctx, s, &cs->write_buffer_trailing_md, 0,
+      fill_in_metadata(s, &cs->write_buffer_trailing_md, 0,
                        &s->to_read_trailing_md, nullptr,
                        &s->to_read_trailing_md_filled);
-      grpc_metadata_batch_clear(exec_ctx, &cs->write_buffer_trailing_md);
+      grpc_metadata_batch_clear(&cs->write_buffer_trailing_md);
       cs->write_buffer_trailing_md_filled = false;
     }
     if (cs->write_buffer_cancel_error != GRPC_ERROR_NONE) {
@@ -326,11 +321,11 @@
   return 0;  // return value is not important
 }
 
-static void close_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s) {
+static void close_stream_locked(inproc_stream* s) {
   if (!s->closed) {
     // Release the metadata that we would have written out
-    grpc_metadata_batch_destroy(exec_ctx, &s->write_buffer_initial_md);
-    grpc_metadata_batch_destroy(exec_ctx, &s->write_buffer_trailing_md);
+    grpc_metadata_batch_destroy(&s->write_buffer_initial_md);
+    grpc_metadata_batch_destroy(&s->write_buffer_trailing_md);
 
     if (s->listed) {
       inproc_stream* p = s->stream_list_prev;
@@ -344,22 +339,21 @@
         n->stream_list_prev = p;
       }
       s->listed = false;
-      unref_stream(exec_ctx, s, "close_stream:list");
+      unref_stream(s, "close_stream:list");
     }
     s->closed = true;
-    unref_stream(exec_ctx, s, "close_stream:closing");
+    unref_stream(s, "close_stream:closing");
   }
 }
 
 // This function means that we are done talking/listening to the other side
-static void close_other_side_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                                    const char* reason) {
+static void close_other_side_locked(inproc_stream* s, const char* reason) {
   if (s->other_side != nullptr) {
     // First release the metadata that came from the other side's arena
-    grpc_metadata_batch_destroy(exec_ctx, &s->to_read_initial_md);
-    grpc_metadata_batch_destroy(exec_ctx, &s->to_read_trailing_md);
+    grpc_metadata_batch_destroy(&s->to_read_initial_md);
+    grpc_metadata_batch_destroy(&s->to_read_trailing_md);
 
-    unref_stream(exec_ctx, s->other_side, reason);
+    unref_stream(s->other_side, reason);
     s->other_side_closed = true;
     s->other_side = nullptr;
   } else if (!s->other_side_closed) {
@@ -371,8 +365,7 @@
 // this stream_op_batch is only one of the pending operations for this
 // stream. This is called when one of the pending operations for the stream
 // is done and about to be NULLed out
-static void complete_if_batch_end_locked(grpc_exec_ctx* exec_ctx,
-                                         inproc_stream* s, grpc_error* error,
+static void complete_if_batch_end_locked(inproc_stream* s, grpc_error* error,
                                          grpc_transport_stream_op_batch* op,
                                          const char* msg) {
   int is_sm = (int)(op == s->send_message_op);
@@ -383,22 +376,20 @@
 
   if ((is_sm + is_stm + is_rim + is_rm + is_rtm) == 1) {
     INPROC_LOG(GPR_DEBUG, "%s %p %p %p", msg, s, op, error);
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_complete, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_REF(error));
   }
 }
 
-static void maybe_schedule_op_closure_locked(grpc_exec_ctx* exec_ctx,
-                                             inproc_stream* s,
+static void maybe_schedule_op_closure_locked(inproc_stream* s,
                                              grpc_error* error) {
   if (s && s->ops_needed && !s->op_closure_scheduled) {
-    GRPC_CLOSURE_SCHED(exec_ctx, &s->op_closure, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(&s->op_closure, GRPC_ERROR_REF(error));
     s->op_closure_scheduled = true;
     s->ops_needed = false;
   }
 }
 
-static void fail_helper_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                               grpc_error* error) {
+static void fail_helper_locked(inproc_stream* s, grpc_error* error) {
   INPROC_LOG(GPR_DEBUG, "op_state_machine %p fail_helper", s);
   // If we're failing this side, we need to make sure that
   // we also send or have already sent trailing metadata
@@ -415,14 +406,14 @@
                                     : &other->to_read_trailing_md;
     bool* destfilled = (other == nullptr) ? &s->write_buffer_trailing_md_filled
                                           : &other->to_read_trailing_md_filled;
-    fill_in_metadata(exec_ctx, s, &fake_md, 0, dest, nullptr, destfilled);
-    grpc_metadata_batch_destroy(exec_ctx, &fake_md);
+    fill_in_metadata(s, &fake_md, 0, dest, nullptr, destfilled);
+    grpc_metadata_batch_destroy(&fake_md);
 
     if (other != nullptr) {
       if (other->cancel_other_error == GRPC_ERROR_NONE) {
         other->cancel_other_error = GRPC_ERROR_REF(error);
       }
-      maybe_schedule_op_closure_locked(exec_ctx, other, error);
+      maybe_schedule_op_closure_locked(other, error);
     } else if (s->write_buffer_cancel_error == GRPC_ERROR_NONE) {
       s->write_buffer_cancel_error = GRPC_ERROR_REF(error);
     }
@@ -436,39 +427,44 @@
       grpc_metadata_batch_init(&fake_md);
       grpc_linked_mdelem* path_md =
           (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*path_md));
-      path_md->md =
-          grpc_mdelem_from_slices(exec_ctx, g_fake_path_key, g_fake_path_value);
-      GPR_ASSERT(grpc_metadata_batch_link_tail(exec_ctx, &fake_md, path_md) ==
+      path_md->md = grpc_mdelem_from_slices(g_fake_path_key, g_fake_path_value);
+      GPR_ASSERT(grpc_metadata_batch_link_tail(&fake_md, path_md) ==
                  GRPC_ERROR_NONE);
       grpc_linked_mdelem* auth_md =
           (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*auth_md));
-      auth_md->md =
-          grpc_mdelem_from_slices(exec_ctx, g_fake_auth_key, g_fake_auth_value);
-      GPR_ASSERT(grpc_metadata_batch_link_tail(exec_ctx, &fake_md, auth_md) ==
+      auth_md->md = grpc_mdelem_from_slices(g_fake_auth_key, g_fake_auth_value);
+      GPR_ASSERT(grpc_metadata_batch_link_tail(&fake_md, auth_md) ==
                  GRPC_ERROR_NONE);
 
       fill_in_metadata(
-          exec_ctx, s, &fake_md, 0,
+          s, &fake_md, 0,
           s->recv_initial_md_op->payload->recv_initial_metadata
               .recv_initial_metadata,
           s->recv_initial_md_op->payload->recv_initial_metadata.recv_flags,
           nullptr);
-      grpc_metadata_batch_destroy(exec_ctx, &fake_md);
+      grpc_metadata_batch_destroy(&fake_md);
       err = GRPC_ERROR_NONE;
     } else {
       err = GRPC_ERROR_REF(error);
     }
+    if (s->recv_initial_md_op->payload->recv_initial_metadata
+            .trailing_metadata_available != nullptr) {
+      // Set to true unconditionally, because we're failing the call, so even
+      // if we haven't actually seen the send_trailing_metadata op from the
+      // other side, we're going to return trailing metadata anyway.
+      *s->recv_initial_md_op->payload->recv_initial_metadata
+           .trailing_metadata_available = true;
+    }
     INPROC_LOG(GPR_DEBUG,
                "fail_helper %p scheduling initial-metadata-ready %p %p", s,
                error, err);
-    GRPC_CLOSURE_SCHED(exec_ctx,
-                       s->recv_initial_md_op->payload->recv_initial_metadata
+    GRPC_CLOSURE_SCHED(s->recv_initial_md_op->payload->recv_initial_metadata
                            .recv_initial_metadata_ready,
                        err);
     // Last use of err so no need to REF and then UNREF it
 
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->recv_initial_md_op,
+        s, error, s->recv_initial_md_op,
         "fail_helper scheduling recv-initial-metadata-on-complete");
     s->recv_initial_md_op = nullptr;
   }
@@ -476,22 +472,22 @@
     INPROC_LOG(GPR_DEBUG, "fail_helper %p scheduling message-ready %p", s,
                error);
     GRPC_CLOSURE_SCHED(
-        exec_ctx, s->recv_message_op->payload->recv_message.recv_message_ready,
+        s->recv_message_op->payload->recv_message.recv_message_ready,
         GRPC_ERROR_REF(error));
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->recv_message_op,
+        s, error, s->recv_message_op,
         "fail_helper scheduling recv-message-on-complete");
     s->recv_message_op = nullptr;
   }
   if (s->send_message_op) {
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->send_message_op,
+        s, error, s->send_message_op,
         "fail_helper scheduling send-message-on-complete");
     s->send_message_op = nullptr;
   }
   if (s->send_trailing_md_op) {
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->send_trailing_md_op,
+        s, error, s->send_trailing_md_op,
         "fail_helper scheduling send-trailng-md-on-complete");
     s->send_trailing_md_op = nullptr;
   }
@@ -500,23 +496,22 @@
                "fail_helper %p scheduling trailing-md-on-complete %p", s,
                error);
     complete_if_batch_end_locked(
-        exec_ctx, s, error, s->recv_trailing_md_op,
+        s, error, s->recv_trailing_md_op,
         "fail_helper scheduling recv-trailing-metadata-on-complete");
     s->recv_trailing_md_op = nullptr;
   }
-  close_other_side_locked(exec_ctx, s, "fail_helper:other_side");
-  close_stream_locked(exec_ctx, s);
+  close_other_side_locked(s, "fail_helper:other_side");
+  close_stream_locked(s);
 
   GRPC_ERROR_UNREF(error);
 }
 
-static void message_transfer_locked(grpc_exec_ctx* exec_ctx,
-                                    inproc_stream* sender,
+static void message_transfer_locked(inproc_stream* sender,
                                     inproc_stream* receiver) {
   size_t remaining =
       sender->send_message_op->payload->send_message.send_message->length;
   if (receiver->recv_inited) {
-    grpc_slice_buffer_destroy_internal(exec_ctx, &receiver->recv_message);
+    grpc_slice_buffer_destroy_internal(&receiver->recv_message);
   }
   grpc_slice_buffer_init(&receiver->recv_message);
   receiver->recv_inited = true;
@@ -524,13 +519,13 @@
     grpc_slice message_slice;
     grpc_closure unused;
     GPR_ASSERT(grpc_byte_stream_next(
-        exec_ctx, sender->send_message_op->payload->send_message.send_message,
-        SIZE_MAX, &unused));
+        sender->send_message_op->payload->send_message.send_message, SIZE_MAX,
+        &unused));
     grpc_error* error = grpc_byte_stream_pull(
-        exec_ctx, sender->send_message_op->payload->send_message.send_message,
+        sender->send_message_op->payload->send_message.send_message,
         &message_slice);
     if (error != GRPC_ERROR_NONE) {
-      cancel_stream_locked(exec_ctx, sender, GRPC_ERROR_REF(error));
+      cancel_stream_locked(sender, GRPC_ERROR_REF(error));
       break;
     }
     GPR_ASSERT(error == GRPC_ERROR_NONE);
@@ -545,22 +540,20 @@
   INPROC_LOG(GPR_DEBUG, "message_transfer_locked %p scheduling message-ready",
              receiver);
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       receiver->recv_message_op->payload->recv_message.recv_message_ready,
       GRPC_ERROR_NONE);
   complete_if_batch_end_locked(
-      exec_ctx, sender, GRPC_ERROR_NONE, sender->send_message_op,
+      sender, GRPC_ERROR_NONE, sender->send_message_op,
       "message_transfer scheduling sender on_complete");
   complete_if_batch_end_locked(
-      exec_ctx, receiver, GRPC_ERROR_NONE, receiver->recv_message_op,
+      receiver, GRPC_ERROR_NONE, receiver->recv_message_op,
       "message_transfer scheduling receiver on_complete");
 
   receiver->recv_message_op = nullptr;
   sender->send_message_op = nullptr;
 }
 
-static void op_state_machine(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error) {
+static void op_state_machine(void* arg, grpc_error* error) {
   // This function gets called when we have contents in the unprocessed reads
   // Get what we want based on our ops wanted
   // Schedule our appropriate closures
@@ -581,26 +574,26 @@
   inproc_stream* other = s->other_side;
 
   if (s->cancel_self_error != GRPC_ERROR_NONE) {
-    fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(s->cancel_self_error));
+    fail_helper_locked(s, GRPC_ERROR_REF(s->cancel_self_error));
     goto done;
   } else if (s->cancel_other_error != GRPC_ERROR_NONE) {
-    fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(s->cancel_other_error));
+    fail_helper_locked(s, GRPC_ERROR_REF(s->cancel_other_error));
     goto done;
   } else if (error != GRPC_ERROR_NONE) {
-    fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(error));
+    fail_helper_locked(s, GRPC_ERROR_REF(error));
     goto done;
   }
 
   if (s->send_message_op && other) {
     if (other->recv_message_op) {
-      message_transfer_locked(exec_ctx, s, other);
-      maybe_schedule_op_closure_locked(exec_ctx, other, GRPC_ERROR_NONE);
+      message_transfer_locked(s, other);
+      maybe_schedule_op_closure_locked(other, GRPC_ERROR_NONE);
     } else if (!s->t->is_client &&
                (s->trailing_md_sent || other->recv_trailing_md_op)) {
       // A server send will never be matched if the client is waiting
       // for trailing metadata already
       complete_if_batch_end_locked(
-          exec_ctx, s, GRPC_ERROR_NONE, s->send_message_op,
+          s, GRPC_ERROR_NONE, s->send_message_op,
           "op_state_machine scheduling send-message-on-complete");
       s->send_message_op = nullptr;
     }
@@ -622,11 +615,11 @@
       // The buffer is already in use; that's an error!
       INPROC_LOG(GPR_DEBUG, "Extra trailing metadata %p", s);
       new_err = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Extra trailing metadata");
-      fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+      fail_helper_locked(s, GRPC_ERROR_REF(new_err));
       goto done;
     } else {
       if (!other || !other->closed) {
-        fill_in_metadata(exec_ctx, s,
+        fill_in_metadata(s,
                          s->send_trailing_md_op->payload->send_trailing_metadata
                              .send_trailing_metadata,
                          0, dest, nullptr, destfilled);
@@ -635,15 +628,15 @@
       if (!s->t->is_client && s->trailing_md_recvd && s->recv_trailing_md_op) {
         INPROC_LOG(GPR_DEBUG,
                    "op_state_machine %p scheduling trailing-md-on-complete", s);
-        GRPC_CLOSURE_SCHED(exec_ctx, s->recv_trailing_md_op->on_complete,
+        GRPC_CLOSURE_SCHED(s->recv_trailing_md_op->on_complete,
                            GRPC_ERROR_NONE);
         s->recv_trailing_md_op = nullptr;
         needs_close = true;
       }
     }
-    maybe_schedule_op_closure_locked(exec_ctx, other, GRPC_ERROR_NONE);
+    maybe_schedule_op_closure_locked(other, GRPC_ERROR_NONE);
     complete_if_batch_end_locked(
-        exec_ctx, s, GRPC_ERROR_NONE, s->send_trailing_md_op,
+        s, GRPC_ERROR_NONE, s->send_trailing_md_op,
         "op_state_machine scheduling send-trailing-metadata-on-complete");
     s->send_trailing_md_op = nullptr;
   }
@@ -656,31 +649,36 @@
           "op_state_machine %p scheduling on_complete errors for already "
           "recvd initial md %p",
           s, new_err);
-      fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+      fail_helper_locked(s, GRPC_ERROR_REF(new_err));
       goto done;
     }
 
     if (s->to_read_initial_md_filled) {
       s->initial_md_recvd = true;
       new_err = fill_in_metadata(
-          exec_ctx, s, &s->to_read_initial_md, s->to_read_initial_md_flags,
+          s, &s->to_read_initial_md, s->to_read_initial_md_flags,
           s->recv_initial_md_op->payload->recv_initial_metadata
               .recv_initial_metadata,
           s->recv_initial_md_op->payload->recv_initial_metadata.recv_flags,
           nullptr);
       s->recv_initial_md_op->payload->recv_initial_metadata
           .recv_initial_metadata->deadline = s->deadline;
-      grpc_metadata_batch_clear(exec_ctx, &s->to_read_initial_md);
+      if (s->recv_initial_md_op->payload->recv_initial_metadata
+              .trailing_metadata_available != nullptr) {
+        *s->recv_initial_md_op->payload->recv_initial_metadata
+             .trailing_metadata_available =
+            (other != nullptr && other->send_trailing_md_op != nullptr);
+      }
+      grpc_metadata_batch_clear(&s->to_read_initial_md);
       s->to_read_initial_md_filled = false;
       INPROC_LOG(GPR_DEBUG,
                  "op_state_machine %p scheduling initial-metadata-ready %p", s,
                  new_err);
-      GRPC_CLOSURE_SCHED(exec_ctx,
-                         s->recv_initial_md_op->payload->recv_initial_metadata
+      GRPC_CLOSURE_SCHED(s->recv_initial_md_op->payload->recv_initial_metadata
                              .recv_initial_metadata_ready,
                          GRPC_ERROR_REF(new_err));
       complete_if_batch_end_locked(
-          exec_ctx, s, new_err, s->recv_initial_md_op,
+          s, new_err, s->recv_initial_md_op,
           "op_state_machine scheduling recv-initial-metadata-on-complete");
       s->recv_initial_md_op = nullptr;
 
@@ -688,20 +686,20 @@
         INPROC_LOG(GPR_DEBUG,
                    "op_state_machine %p scheduling on_complete errors2 %p", s,
                    new_err);
-        fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+        fail_helper_locked(s, GRPC_ERROR_REF(new_err));
         goto done;
       }
     }
   }
   if (s->recv_message_op) {
     if (other && other->send_message_op) {
-      message_transfer_locked(exec_ctx, other, s);
-      maybe_schedule_op_closure_locked(exec_ctx, other, GRPC_ERROR_NONE);
+      message_transfer_locked(other, s);
+      maybe_schedule_op_closure_locked(other, GRPC_ERROR_NONE);
     }
   }
   if (s->recv_trailing_md_op && s->t->is_client && other &&
       other->send_message_op) {
-    maybe_schedule_op_closure_locked(exec_ctx, other, GRPC_ERROR_NONE);
+    maybe_schedule_op_closure_locked(other, GRPC_ERROR_NONE);
   }
   if (s->to_read_trailing_md_filled) {
     if (s->trailing_md_recvd) {
@@ -712,7 +710,7 @@
           "op_state_machine %p scheduling on_complete errors for already "
           "recvd trailing md %p",
           s, new_err);
-      fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+      fail_helper_locked(s, GRPC_ERROR_REF(new_err));
       goto done;
     }
     if (s->recv_message_op != nullptr) {
@@ -720,11 +718,10 @@
       // satisfied
       INPROC_LOG(GPR_DEBUG, "op_state_machine %p scheduling message-ready", s);
       GRPC_CLOSURE_SCHED(
-          exec_ctx,
           s->recv_message_op->payload->recv_message.recv_message_ready,
           GRPC_ERROR_NONE);
       complete_if_batch_end_locked(
-          exec_ctx, s, new_err, s->recv_message_op,
+          s, new_err, s->recv_message_op,
           "op_state_machine scheduling recv-message-on-complete");
       s->recv_message_op = nullptr;
     }
@@ -732,7 +729,7 @@
       // Nothing further will try to receive from this stream, so finish off
       // any outstanding send_message op
       complete_if_batch_end_locked(
-          exec_ctx, s, new_err, s->send_message_op,
+          s, new_err, s->send_message_op,
           "op_state_machine scheduling send-message-on-complete");
       s->send_message_op = nullptr;
     }
@@ -740,11 +737,11 @@
       // We wanted trailing metadata and we got it
       s->trailing_md_recvd = true;
       new_err =
-          fill_in_metadata(exec_ctx, s, &s->to_read_trailing_md, 0,
+          fill_in_metadata(s, &s->to_read_trailing_md, 0,
                            s->recv_trailing_md_op->payload
                                ->recv_trailing_metadata.recv_trailing_metadata,
                            nullptr, nullptr);
-      grpc_metadata_batch_clear(exec_ctx, &s->to_read_trailing_md);
+      grpc_metadata_batch_clear(&s->to_read_trailing_md);
       s->to_read_trailing_md_filled = false;
 
       // We should schedule the recv_trailing_md_op completion if
@@ -756,7 +753,7 @@
         INPROC_LOG(GPR_DEBUG,
                    "op_state_machine %p scheduling trailing-md-on-complete %p",
                    s, new_err);
-        GRPC_CLOSURE_SCHED(exec_ctx, s->recv_trailing_md_op->on_complete,
+        GRPC_CLOSURE_SCHED(s->recv_trailing_md_op->on_complete,
                            GRPC_ERROR_REF(new_err));
         s->recv_trailing_md_op = nullptr;
         needs_close = true;
@@ -777,10 +774,10 @@
     // recv_message_op
     INPROC_LOG(GPR_DEBUG, "op_state_machine %p scheduling message-ready", s);
     GRPC_CLOSURE_SCHED(
-        exec_ctx, s->recv_message_op->payload->recv_message.recv_message_ready,
+        s->recv_message_op->payload->recv_message.recv_message_ready,
         GRPC_ERROR_NONE);
     complete_if_batch_end_locked(
-        exec_ctx, s, new_err, s->recv_message_op,
+        s, new_err, s->recv_message_op,
         "op_state_machine scheduling recv-message-on-complete");
     s->recv_message_op = nullptr;
   }
@@ -789,7 +786,7 @@
     // Nothing further will try to receive from this stream, so finish off
     // any outstanding send_message op
     complete_if_batch_end_locked(
-        exec_ctx, s, new_err, s->send_message_op,
+        s, new_err, s->send_message_op,
         "op_state_machine scheduling send-message-on-complete");
     s->send_message_op = nullptr;
   }
@@ -805,22 +802,21 @@
   }
 done:
   if (needs_close) {
-    close_other_side_locked(exec_ctx, s, "op_state_machine");
-    close_stream_locked(exec_ctx, s);
+    close_other_side_locked(s, "op_state_machine");
+    close_stream_locked(s);
   }
   gpr_mu_unlock(mu);
   GRPC_ERROR_UNREF(new_err);
 }
 
-static bool cancel_stream_locked(grpc_exec_ctx* exec_ctx, inproc_stream* s,
-                                 grpc_error* error) {
+static bool cancel_stream_locked(inproc_stream* s, grpc_error* error) {
   bool ret = false;  // was the cancel accepted
   INPROC_LOG(GPR_DEBUG, "cancel_stream %p with %s", s,
              grpc_error_string(error));
   if (s->cancel_self_error == GRPC_ERROR_NONE) {
     ret = true;
     s->cancel_self_error = GRPC_ERROR_REF(error);
-    maybe_schedule_op_closure_locked(exec_ctx, s, s->cancel_self_error);
+    maybe_schedule_op_closure_locked(s, s->cancel_self_error);
     // Send trailing md to the other side indicating cancellation, even if we
     // already have
     s->trailing_md_sent = true;
@@ -834,15 +830,14 @@
                                     : &other->to_read_trailing_md;
     bool* destfilled = (other == nullptr) ? &s->write_buffer_trailing_md_filled
                                           : &other->to_read_trailing_md_filled;
-    fill_in_metadata(exec_ctx, s, &cancel_md, 0, dest, nullptr, destfilled);
-    grpc_metadata_batch_destroy(exec_ctx, &cancel_md);
+    fill_in_metadata(s, &cancel_md, 0, dest, nullptr, destfilled);
+    grpc_metadata_batch_destroy(&cancel_md);
 
     if (other != nullptr) {
       if (other->cancel_other_error == GRPC_ERROR_NONE) {
         other->cancel_other_error = GRPC_ERROR_REF(s->cancel_self_error);
       }
-      maybe_schedule_op_closure_locked(exec_ctx, other,
-                                       other->cancel_other_error);
+      maybe_schedule_op_closure_locked(other, other->cancel_other_error);
     } else if (s->write_buffer_cancel_error == GRPC_ERROR_NONE) {
       s->write_buffer_cancel_error = GRPC_ERROR_REF(s->cancel_self_error);
     }
@@ -852,21 +847,20 @@
     // md, now's the chance
     if (!s->t->is_client && s->trailing_md_recvd && s->recv_trailing_md_op) {
       complete_if_batch_end_locked(
-          exec_ctx, s, s->cancel_self_error, s->recv_trailing_md_op,
+          s, s->cancel_self_error, s->recv_trailing_md_op,
           "cancel_stream scheduling trailing-md-on-complete");
       s->recv_trailing_md_op = nullptr;
     }
   }
 
-  close_other_side_locked(exec_ctx, s, "cancel_stream:other_side");
-  close_stream_locked(exec_ctx, s);
+  close_other_side_locked(s, "cancel_stream:other_side");
+  close_stream_locked(s);
 
   GRPC_ERROR_UNREF(error);
   return ret;
 }
 
-static void perform_stream_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                              grpc_stream* gs,
+static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
                               grpc_transport_stream_op_batch* op) {
   INPROC_LOG(GPR_DEBUG, "perform_stream_op %p %p %p", gt, gs, op);
   inproc_stream* s = (inproc_stream*)gs;
@@ -892,7 +886,7 @@
   if (op->cancel_stream) {
     // Call cancel_stream_locked without ref'ing the cancel_error because
     // this function is responsible to make sure that that field gets unref'ed
-    cancel_stream_locked(exec_ctx, s, op->payload->cancel_stream.cancel_error);
+    cancel_stream_locked(s, op->payload->cancel_stream.cancel_error);
     // this op can complete without an error
   } else if (s->cancel_self_error != GRPC_ERROR_NONE) {
     // already self-canceled so still give it an error
@@ -932,8 +926,7 @@
       } else {
         if (!other || !other->closed) {
           fill_in_metadata(
-              exec_ctx, s,
-              op->payload->send_initial_metadata.send_initial_metadata,
+              s, op->payload->send_initial_metadata.send_initial_metadata,
               op->payload->send_initial_metadata.send_initial_metadata_flags,
               dest, destflags, destfilled);
         }
@@ -945,7 +938,7 @@
           s->initial_md_sent = true;
         }
       }
-      maybe_schedule_op_closure_locked(exec_ctx, other, error);
+      maybe_schedule_op_closure_locked(other, error);
     }
   }
 
@@ -985,7 +978,7 @@
         (op->recv_message && other && (other->send_message_op != nullptr)) ||
         (s->to_read_trailing_md_filled || s->trailing_md_recvd)) {
       if (!s->op_closure_scheduled) {
-        GRPC_CLOSURE_SCHED(exec_ctx, &s->op_closure, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(&s->op_closure, GRPC_ERROR_NONE);
         s->op_closure_scheduled = true;
       }
     } else {
@@ -995,12 +988,20 @@
     if (error != GRPC_ERROR_NONE) {
       // Schedule op's closures that we didn't push to op state machine
       if (op->recv_initial_metadata) {
+        if (op->payload->recv_initial_metadata.trailing_metadata_available !=
+            nullptr) {
+          // Set to true unconditionally, because we're failing the call, so
+          // even if we haven't actually seen the send_trailing_metadata op
+          // from the other side, we're going to return trailing metadata
+          // anyway.
+          *op->payload->recv_initial_metadata.trailing_metadata_available =
+              true;
+        }
         INPROC_LOG(
             GPR_DEBUG,
             "perform_stream_op error %p scheduling initial-metadata-ready %p",
             s, error);
         GRPC_CLOSURE_SCHED(
-            exec_ctx,
             op->payload->recv_initial_metadata.recv_initial_metadata_ready,
             GRPC_ERROR_REF(error));
       }
@@ -1009,28 +1010,26 @@
             GPR_DEBUG,
             "perform_stream_op error %p scheduling recv message-ready %p", s,
             error);
-        GRPC_CLOSURE_SCHED(exec_ctx,
-                           op->payload->recv_message.recv_message_ready,
+        GRPC_CLOSURE_SCHED(op->payload->recv_message.recv_message_ready,
                            GRPC_ERROR_REF(error));
       }
     }
     INPROC_LOG(GPR_DEBUG, "perform_stream_op %p scheduling on_complete %p", s,
                error);
-    GRPC_CLOSURE_SCHED(exec_ctx, on_complete, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(on_complete, GRPC_ERROR_REF(error));
   }
   if (needs_close) {
-    close_other_side_locked(exec_ctx, s, "perform_stream_op:other_side");
-    close_stream_locked(exec_ctx, s);
+    close_other_side_locked(s, "perform_stream_op:other_side");
+    close_stream_locked(s);
   }
   gpr_mu_unlock(mu);
   GRPC_ERROR_UNREF(error);
 }
 
-static void close_transport_locked(grpc_exec_ctx* exec_ctx,
-                                   inproc_transport* t) {
+static void close_transport_locked(inproc_transport* t) {
   INPROC_LOG(GPR_DEBUG, "close_transport %p %d", t, t->is_closed);
   grpc_connectivity_state_set(
-      exec_ctx, &t->connectivity, GRPC_CHANNEL_SHUTDOWN,
+      &t->connectivity, GRPC_CHANNEL_SHUTDOWN,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Closing transport."),
       "close transport");
   if (!t->is_closed) {
@@ -1039,7 +1038,7 @@
     while (t->stream_list != nullptr) {
       // cancel_stream_locked also adjusts stream list
       cancel_stream_locked(
-          exec_ctx, t->stream_list,
+          t->stream_list,
           grpc_error_set_int(
               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport closed"),
               GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
@@ -1047,14 +1046,13 @@
   }
 }
 
-static void perform_transport_op(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                                 grpc_transport_op* op) {
+static void perform_transport_op(grpc_transport* gt, grpc_transport_op* op) {
   inproc_transport* t = (inproc_transport*)gt;
   INPROC_LOG(GPR_DEBUG, "perform_transport_op %p %p", t, op);
   gpr_mu_lock(&t->mu->mu);
   if (op->on_connectivity_state_change) {
     grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &t->connectivity, op->connectivity_state,
+        &t->connectivity, op->connectivity_state,
         op->on_connectivity_state_change);
   }
   if (op->set_accept_stream) {
@@ -1062,7 +1060,7 @@
     t->accept_stream_data = op->set_accept_stream_user_data;
   }
   if (op->on_consumed) {
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
   }
 
   bool do_close = false;
@@ -1076,71 +1074,67 @@
   }
 
   if (do_close) {
-    close_transport_locked(exec_ctx, t);
+    close_transport_locked(t);
   }
   gpr_mu_unlock(&t->mu->mu);
 }
 
-static void destroy_stream(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                           grpc_stream* gs,
+static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
   INPROC_LOG(GPR_DEBUG, "destroy_stream %p %p", gs, then_schedule_closure);
   inproc_stream* s = (inproc_stream*)gs;
   s->closure_at_destroy = then_schedule_closure;
-  really_destroy_stream(exec_ctx, s);
+  really_destroy_stream(s);
 }
 
-static void destroy_transport(grpc_exec_ctx* exec_ctx, grpc_transport* gt) {
+static void destroy_transport(grpc_transport* gt) {
   inproc_transport* t = (inproc_transport*)gt;
   INPROC_LOG(GPR_DEBUG, "destroy_transport %p", t);
   gpr_mu_lock(&t->mu->mu);
-  close_transport_locked(exec_ctx, t);
+  close_transport_locked(t);
   gpr_mu_unlock(&t->mu->mu);
-  unref_transport(exec_ctx, t->other_side);
-  unref_transport(exec_ctx, t);
+  unref_transport(t->other_side);
+  unref_transport(t);
 }
 
 /*******************************************************************************
  * INTEGRATION GLUE
  */
 
-static void set_pollset(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                        grpc_stream* gs, grpc_pollset* pollset) {
+static void set_pollset(grpc_transport* gt, grpc_stream* gs,
+                        grpc_pollset* pollset) {
   // Nothing to do here
 }
 
-static void set_pollset_set(grpc_exec_ctx* exec_ctx, grpc_transport* gt,
-                            grpc_stream* gs, grpc_pollset_set* pollset_set) {
+static void set_pollset_set(grpc_transport* gt, grpc_stream* gs,
+                            grpc_pollset_set* pollset_set) {
   // Nothing to do here
 }
 
-static grpc_endpoint* get_endpoint(grpc_exec_ctx* exec_ctx, grpc_transport* t) {
-  return nullptr;
-}
+static grpc_endpoint* get_endpoint(grpc_transport* t) { return nullptr; }
 
 /*******************************************************************************
  * GLOBAL INIT AND DESTROY
  */
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
 void grpc_inproc_transport_init(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_CLOSURE_INIT(&do_nothing_closure, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
   g_empty_slice = grpc_slice_from_static_buffer(nullptr, 0);
 
   grpc_slice key_tmp = grpc_slice_from_static_string(":path");
   g_fake_path_key = grpc_slice_intern(key_tmp);
-  grpc_slice_unref_internal(&exec_ctx, key_tmp);
+  grpc_slice_unref_internal(key_tmp);
 
   g_fake_path_value = grpc_slice_from_static_string("/");
 
   grpc_slice auth_tmp = grpc_slice_from_static_string(":authority");
   g_fake_auth_key = grpc_slice_intern(auth_tmp);
-  grpc_slice_unref_internal(&exec_ctx, auth_tmp);
+  grpc_slice_unref_internal(auth_tmp);
 
   g_fake_auth_value = grpc_slice_from_static_string("inproc-fail");
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static const grpc_transport_vtable inproc_vtable = {
@@ -1152,8 +1146,7 @@
 /*******************************************************************************
  * Main inproc transport functions
  */
-static void inproc_transports_create(grpc_exec_ctx* exec_ctx,
-                                     grpc_transport** server_transport,
+static void inproc_transports_create(grpc_transport** server_transport,
                                      const grpc_channel_args* server_args,
                                      grpc_transport** client_transport,
                                      const grpc_channel_args* client_args) {
@@ -1190,7 +1183,7 @@
   GRPC_API_TRACE("grpc_inproc_channel_create(server=%p, args=%p)", 2,
                  (server, args));
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   const grpc_channel_args* server_args = grpc_server_get_channel_args(server);
 
@@ -1205,30 +1198,26 @@
 
   grpc_transport* server_transport;
   grpc_transport* client_transport;
-  inproc_transports_create(&exec_ctx, &server_transport, server_args,
-                           &client_transport, client_args);
+  inproc_transports_create(&server_transport, server_args, &client_transport,
+                           client_args);
 
-  grpc_server_setup_transport(&exec_ctx, server, server_transport, nullptr,
-                              server_args);
-  grpc_channel* channel =
-      grpc_channel_create(&exec_ctx, "inproc", client_args,
-                          GRPC_CLIENT_DIRECT_CHANNEL, client_transport);
+  grpc_server_setup_transport(server, server_transport, nullptr, server_args);
+  grpc_channel* channel = grpc_channel_create(
+      "inproc", client_args, GRPC_CLIENT_DIRECT_CHANNEL, client_transport);
 
   // Free up created channel args
-  grpc_channel_args_destroy(&exec_ctx, client_args);
+  grpc_channel_args_destroy(client_args);
 
   // Now finish scheduled operations
-  grpc_exec_ctx_finish(&exec_ctx);
 
   return channel;
 }
 
 void grpc_inproc_transport_shutdown(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_unref_internal(&exec_ctx, g_empty_slice);
-  grpc_slice_unref_internal(&exec_ctx, g_fake_path_key);
-  grpc_slice_unref_internal(&exec_ctx, g_fake_path_value);
-  grpc_slice_unref_internal(&exec_ctx, g_fake_auth_key);
-  grpc_slice_unref_internal(&exec_ctx, g_fake_auth_value);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_unref_internal(g_empty_slice);
+  grpc_slice_unref_internal(g_fake_path_key);
+  grpc_slice_unref_internal(g_fake_path_value);
+  grpc_slice_unref_internal(g_fake_auth_key);
+  grpc_slice_unref_internal(g_fake_auth_value);
 }
diff --git a/src/core/lib/backoff/backoff.cc b/src/core/lib/backoff/backoff.cc
index dc754dd..da3b9b1 100644
--- a/src/core/lib/backoff/backoff.cc
+++ b/src/core/lib/backoff/backoff.cc
@@ -32,12 +32,11 @@
   backoff->rng_state = (uint32_t)gpr_now(GPR_CLOCK_REALTIME).tv_nsec;
 }
 
-grpc_backoff_result grpc_backoff_begin(grpc_exec_ctx* exec_ctx,
-                                       grpc_backoff* backoff) {
+grpc_backoff_result grpc_backoff_begin(grpc_backoff* backoff) {
   backoff->current_backoff = backoff->initial_backoff;
   const grpc_millis initial_timeout =
       GPR_MAX(backoff->initial_backoff, backoff->min_connect_timeout);
-  const grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  const grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   const grpc_backoff_result result = {now + initial_timeout,
                                       now + backoff->current_backoff};
   return result;
@@ -57,8 +56,7 @@
   return a + generate_uniform_random_number(rng_state) * range;
 }
 
-grpc_backoff_result grpc_backoff_step(grpc_exec_ctx* exec_ctx,
-                                      grpc_backoff* backoff) {
+grpc_backoff_result grpc_backoff_step(grpc_backoff* backoff) {
   backoff->current_backoff = (grpc_millis)(GPR_MIN(
       backoff->current_backoff * backoff->multiplier, backoff->max_backoff));
   const double jitter = generate_uniform_random_number_between(
@@ -69,7 +67,7 @@
               backoff->min_connect_timeout);
   const grpc_millis next_timeout = GPR_MIN(
       (grpc_millis)(backoff->current_backoff + jitter), backoff->max_backoff);
-  const grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  const grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   const grpc_backoff_result result = {now + current_timeout,
                                       now + next_timeout};
   return result;
diff --git a/src/core/lib/backoff/backoff.h b/src/core/lib/backoff/backoff.h
index 0da9082..f61d14e 100644
--- a/src/core/lib/backoff/backoff.h
+++ b/src/core/lib/backoff/backoff.h
@@ -60,13 +60,11 @@
 
 /// Begin retry loop: returns the deadlines to be used for the current attempt
 /// and the subsequent retry, if any.
-grpc_backoff_result grpc_backoff_begin(grpc_exec_ctx* exec_ctx,
-                                       grpc_backoff* backoff);
+grpc_backoff_result grpc_backoff_begin(grpc_backoff* backoff);
 
 /// Step a retry loop: returns the deadlines to be used for the current attempt
 /// and the subsequent retry, if any.
-grpc_backoff_result grpc_backoff_step(grpc_exec_ctx* exec_ctx,
-                                      grpc_backoff* backoff);
+grpc_backoff_result grpc_backoff_step(grpc_backoff* backoff);
 
 /// Reset the backoff, so the next grpc_backoff_step will be a
 /// grpc_backoff_begin.
diff --git a/src/core/lib/channel/channel_args.cc b/src/core/lib/channel/channel_args.cc
index 735fcbe..578475b 100644
--- a/src/core/lib/channel/channel_args.cc
+++ b/src/core/lib/channel/channel_args.cc
@@ -188,7 +188,7 @@
   return b;
 }
 
-void grpc_channel_args_destroy(grpc_exec_ctx* exec_ctx, grpc_channel_args* a) {
+void grpc_channel_args_destroy(grpc_channel_args* a) {
   size_t i;
   if (!a) return;
   for (i = 0; i < a->num_args; i++) {
@@ -199,8 +199,7 @@
       case GRPC_ARG_INTEGER:
         break;
       case GRPC_ARG_POINTER:
-        a->args[i].value.pointer.vtable->destroy(exec_ctx,
-                                                 a->args[i].value.pointer.p);
+        a->args[i].value.pointer.vtable->destroy(a->args[i].value.pointer.p);
         break;
     }
     gpr_free(a->args[i].key);
@@ -299,8 +298,7 @@
 }
 
 grpc_channel_args* grpc_channel_args_compression_algorithm_set_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_args** a,
-    grpc_compression_algorithm algorithm, int state) {
+    grpc_channel_args** a, grpc_compression_algorithm algorithm, int state) {
   int* states_arg = nullptr;
   grpc_channel_args* result = *a;
   const int states_arg_found =
@@ -333,15 +331,15 @@
       GPR_BITCLEAR((unsigned*)&tmp.value.integer, algorithm);
     }
     result = grpc_channel_args_copy_and_add(*a, &tmp, 1);
-    grpc_channel_args_destroy(exec_ctx, *a);
+    grpc_channel_args_destroy(*a);
     *a = result;
   }
   return result;
 }
 
 grpc_channel_args* grpc_channel_args_stream_compression_algorithm_set_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_args** a,
-    grpc_stream_compression_algorithm algorithm, int state) {
+    grpc_channel_args** a, grpc_stream_compression_algorithm algorithm,
+    int state) {
   int* states_arg = nullptr;
   grpc_channel_args* result = *a;
   const int states_arg_found =
@@ -375,7 +373,7 @@
       GPR_BITCLEAR((unsigned*)&tmp.value.integer, algorithm);
     }
     result = grpc_channel_args_copy_and_add(*a, &tmp, 1);
-    grpc_channel_args_destroy(exec_ctx, *a);
+    grpc_channel_args_destroy(*a);
     *a = result;
   }
   return result;
diff --git a/src/core/lib/channel/channel_args.h b/src/core/lib/channel/channel_args.h
index f6cb7fa..9c7d06f 100644
--- a/src/core/lib/channel/channel_args.h
+++ b/src/core/lib/channel/channel_args.h
@@ -53,7 +53,7 @@
                                            const grpc_channel_args* b);
 
 /** Destroy arguments created by \a grpc_channel_args_copy */
-void grpc_channel_args_destroy(grpc_exec_ctx* exec_ctx, grpc_channel_args* a);
+void grpc_channel_args_destroy(grpc_channel_args* a);
 
 /** Returns the compression algorithm set in \a a. */
 grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
@@ -85,8 +85,7 @@
  * modified to point to the returned instance (which may be different from the
  * input value of \a a). */
 grpc_channel_args* grpc_channel_args_compression_algorithm_set_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_args** a,
-    grpc_compression_algorithm algorithm, int enabled);
+    grpc_channel_args** a, grpc_compression_algorithm algorithm, int enabled);
 
 /** Sets the support for the given stream compression algorithm. By default, all
  * stream compression algorithms are enabled. It's an error to disable an
@@ -96,8 +95,8 @@
  * modified to point to the returned instance (which may be different from the
  * input value of \a a). */
 grpc_channel_args* grpc_channel_args_stream_compression_algorithm_set_state(
-    grpc_exec_ctx* exec_ctx, grpc_channel_args** a,
-    grpc_stream_compression_algorithm algorithm, int enabled);
+    grpc_channel_args** a, grpc_stream_compression_algorithm algorithm,
+    int enabled);
 
 /** Returns the bitset representing the support state (true for enabled, false
  * for disabled) for compression algorithms.
diff --git a/src/core/lib/channel/channel_stack.cc b/src/core/lib/channel/channel_stack.cc
index 7629d18..195fe0b 100644
--- a/src/core/lib/channel/channel_stack.cc
+++ b/src/core/lib/channel/channel_stack.cc
@@ -88,8 +88,8 @@
 }
 
 grpc_error* grpc_channel_stack_init(
-    grpc_exec_ctx* exec_ctx, int initial_refs, grpc_iomgr_cb_func destroy,
-    void* destroy_arg, const grpc_channel_filter** filters, size_t filter_count,
+    int initial_refs, grpc_iomgr_cb_func destroy, void* destroy_arg,
+    const grpc_channel_filter** filters, size_t filter_count,
     const grpc_channel_args* channel_args, grpc_transport* optional_transport,
     const char* name, grpc_channel_stack* stack) {
   size_t call_size =
@@ -117,8 +117,7 @@
     args.is_last = i == (filter_count - 1);
     elems[i].filter = filters[i];
     elems[i].channel_data = user_data;
-    grpc_error* error =
-        elems[i].filter->init_channel_elem(exec_ctx, &elems[i], &args);
+    grpc_error* error = elems[i].filter->init_channel_elem(&elems[i], &args);
     if (error != GRPC_ERROR_NONE) {
       if (first_error == GRPC_ERROR_NONE) {
         first_error = error;
@@ -138,20 +137,18 @@
   return first_error;
 }
 
-void grpc_channel_stack_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_stack* stack) {
+void grpc_channel_stack_destroy(grpc_channel_stack* stack) {
   grpc_channel_element* channel_elems = CHANNEL_ELEMS_FROM_STACK(stack);
   size_t count = stack->count;
   size_t i;
 
   /* destroy per-filter data */
   for (i = 0; i < count; i++) {
-    channel_elems[i].filter->destroy_channel_elem(exec_ctx, &channel_elems[i]);
+    channel_elems[i].filter->destroy_channel_elem(&channel_elems[i]);
   }
 }
 
-grpc_error* grpc_call_stack_init(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_stack* channel_stack,
+grpc_error* grpc_call_stack_init(grpc_channel_stack* channel_stack,
                                  int initial_refs, grpc_iomgr_cb_func destroy,
                                  void* destroy_arg,
                                  const grpc_call_element_args* elem_args) {
@@ -174,8 +171,8 @@
     call_elems[i].filter = channel_elems[i].filter;
     call_elems[i].channel_data = channel_elems[i].channel_data;
     call_elems[i].call_data = user_data;
-    grpc_error* error = call_elems[i].filter->init_call_elem(
-        exec_ctx, &call_elems[i], elem_args);
+    grpc_error* error =
+        call_elems[i].filter->init_call_elem(&call_elems[i], elem_args);
     if (error != GRPC_ERROR_NONE) {
       if (first_error == GRPC_ERROR_NONE) {
         first_error = error;
@@ -189,8 +186,7 @@
   return first_error;
 }
 
-void grpc_call_stack_set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                                grpc_call_stack* call_stack,
+void grpc_call_stack_set_pollset_or_pollset_set(grpc_call_stack* call_stack,
                                                 grpc_polling_entity* pollent) {
   size_t count = call_stack->count;
   grpc_call_element* call_elems;
@@ -203,18 +199,16 @@
 
   /* init per-filter data */
   for (i = 0; i < count; i++) {
-    call_elems[i].filter->set_pollset_or_pollset_set(exec_ctx, &call_elems[i],
-                                                     pollent);
+    call_elems[i].filter->set_pollset_or_pollset_set(&call_elems[i], pollent);
     user_data +=
         ROUND_UP_TO_ALIGNMENT_SIZE(call_elems[i].filter->sizeof_call_data);
   }
 }
 
 void grpc_call_stack_ignore_set_pollset_or_pollset_set(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_polling_entity* pollent) {}
+    grpc_call_element* elem, grpc_polling_entity* pollent) {}
 
-void grpc_call_stack_destroy(grpc_exec_ctx* exec_ctx, grpc_call_stack* stack,
+void grpc_call_stack_destroy(grpc_call_stack* stack,
                              const grpc_call_final_info* final_info,
                              grpc_closure* then_schedule_closure) {
   grpc_call_element* elems = CALL_ELEMS_FROM_STACK(stack);
@@ -224,29 +218,27 @@
   /* destroy per-filter data */
   for (i = 0; i < count; i++) {
     elems[i].filter->destroy_call_elem(
-        exec_ctx, &elems[i], final_info,
+        &elems[i], final_info,
         i == count - 1 ? then_schedule_closure : nullptr);
   }
 }
 
-void grpc_call_next_op(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_call_next_op(grpc_call_element* elem,
                        grpc_transport_stream_op_batch* op) {
   grpc_call_element* next_elem = elem + 1;
   GRPC_CALL_LOG_OP(GPR_INFO, next_elem, op);
-  next_elem->filter->start_transport_stream_op_batch(exec_ctx, next_elem, op);
+  next_elem->filter->start_transport_stream_op_batch(next_elem, op);
 }
 
-void grpc_channel_next_get_info(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_element* elem,
+void grpc_channel_next_get_info(grpc_channel_element* elem,
                                 const grpc_channel_info* channel_info) {
   grpc_channel_element* next_elem = elem + 1;
-  next_elem->filter->get_channel_info(exec_ctx, next_elem, channel_info);
+  next_elem->filter->get_channel_info(next_elem, channel_info);
 }
 
-void grpc_channel_next_op(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-                          grpc_transport_op* op) {
+void grpc_channel_next_op(grpc_channel_element* elem, grpc_transport_op* op) {
   grpc_channel_element* next_elem = elem + 1;
-  next_elem->filter->start_transport_op(exec_ctx, next_elem, op);
+  next_elem->filter->start_transport_op(next_elem, op);
 }
 
 grpc_channel_stack* grpc_channel_stack_from_top_element(
diff --git a/src/core/lib/channel/channel_stack.h b/src/core/lib/channel/channel_stack.h
index 1b6e539..716866b 100644
--- a/src/core/lib/channel/channel_stack.h
+++ b/src/core/lib/channel/channel_stack.h
@@ -96,14 +96,12 @@
 typedef struct {
   /* Called to eg. send/receive data on a call.
      See grpc_call_next_op on how to call the next element in the stack */
-  void (*start_transport_stream_op_batch)(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+  void (*start_transport_stream_op_batch)(grpc_call_element* elem,
                                           grpc_transport_stream_op_batch* op);
   /* Called to handle channel level operations - e.g. new calls, or transport
      closure.
      See grpc_channel_next_op on how to call the next element in the stack */
-  void (*start_transport_op)(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_element* elem, grpc_transport_op* op);
+  void (*start_transport_op)(grpc_channel_element* elem, grpc_transport_op* op);
 
   /* sizeof(per call data) */
   size_t sizeof_call_data;
@@ -116,11 +114,9 @@
      transport and is on the server. Most filters want to ignore this
      argument.
      Implementations may assume that elem->call_data is all zeros. */
-  grpc_error* (*init_call_elem)(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem,
+  grpc_error* (*init_call_elem)(grpc_call_element* elem,
                                 const grpc_call_element_args* args);
-  void (*set_pollset_or_pollset_set)(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+  void (*set_pollset_or_pollset_set)(grpc_call_element* elem,
                                      grpc_polling_entity* pollent);
   /* Destroy per call data.
      The filter does not need to do any chaining.
@@ -128,7 +124,7 @@
      \a then_schedule_closure that should be passed to GRPC_CLOSURE_SCHED when
      destruction is complete. \a final_info contains data about the completed
      call, mainly for reporting purposes. */
-  void (*destroy_call_elem)(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+  void (*destroy_call_elem)(grpc_call_element* elem,
                             const grpc_call_final_info* final_info,
                             grpc_closure* then_schedule_closure);
 
@@ -141,16 +137,14 @@
      useful for asserting correct configuration by upper layer code.
      The filter does not need to do any chaining.
      Implementations may assume that elem->call_data is all zeros. */
-  grpc_error* (*init_channel_elem)(grpc_exec_ctx* exec_ctx,
-                                   grpc_channel_element* elem,
+  grpc_error* (*init_channel_elem)(grpc_channel_element* elem,
                                    grpc_channel_element_args* args);
   /* Destroy per channel data.
      The filter does not need to do any chaining */
-  void (*destroy_channel_elem)(grpc_exec_ctx* exec_ctx,
-                               grpc_channel_element* elem);
+  void (*destroy_channel_elem)(grpc_channel_element* elem);
 
   /* Implement grpc_channel_get_info() */
-  void (*get_channel_info)(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  void (*get_channel_info)(grpc_channel_element* elem,
                            const grpc_channel_info* channel_info);
 
   /* The name of this filter */
@@ -208,68 +202,62 @@
                                size_t filter_count);
 /* Initialize a channel stack given some filters */
 grpc_error* grpc_channel_stack_init(
-    grpc_exec_ctx* exec_ctx, int initial_refs, grpc_iomgr_cb_func destroy,
-    void* destroy_arg, const grpc_channel_filter** filters, size_t filter_count,
+    int initial_refs, grpc_iomgr_cb_func destroy, void* destroy_arg,
+    const grpc_channel_filter** filters, size_t filter_count,
     const grpc_channel_args* args, grpc_transport* optional_transport,
     const char* name, grpc_channel_stack* stack);
 /* Destroy a channel stack */
-void grpc_channel_stack_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_stack* stack);
+void grpc_channel_stack_destroy(grpc_channel_stack* stack);
 
 /* Initialize a call stack given a channel stack. transport_server_data is
    expected to be NULL on a client, or an opaque transport owned pointer on the
    server. */
-grpc_error* grpc_call_stack_init(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_stack* channel_stack,
+grpc_error* grpc_call_stack_init(grpc_channel_stack* channel_stack,
                                  int initial_refs, grpc_iomgr_cb_func destroy,
                                  void* destroy_arg,
                                  const grpc_call_element_args* elem_args);
 /* Set a pollset or a pollset_set for a call stack: must occur before the first
  * op is started */
-void grpc_call_stack_set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                                grpc_call_stack* call_stack,
+void grpc_call_stack_set_pollset_or_pollset_set(grpc_call_stack* call_stack,
                                                 grpc_polling_entity* pollent);
 
 #ifndef NDEBUG
 #define GRPC_CALL_STACK_REF(call_stack, reason) \
   grpc_stream_ref(&(call_stack)->refcount, reason)
-#define GRPC_CALL_STACK_UNREF(exec_ctx, call_stack, reason) \
-  grpc_stream_unref(exec_ctx, &(call_stack)->refcount, reason)
+#define GRPC_CALL_STACK_UNREF(call_stack, reason) \
+  grpc_stream_unref(&(call_stack)->refcount, reason)
 #define GRPC_CHANNEL_STACK_REF(channel_stack, reason) \
   grpc_stream_ref(&(channel_stack)->refcount, reason)
-#define GRPC_CHANNEL_STACK_UNREF(exec_ctx, channel_stack, reason) \
-  grpc_stream_unref(exec_ctx, &(channel_stack)->refcount, reason)
+#define GRPC_CHANNEL_STACK_UNREF(channel_stack, reason) \
+  grpc_stream_unref(&(channel_stack)->refcount, reason)
 #else
 #define GRPC_CALL_STACK_REF(call_stack, reason) \
   grpc_stream_ref(&(call_stack)->refcount)
-#define GRPC_CALL_STACK_UNREF(exec_ctx, call_stack, reason) \
-  grpc_stream_unref(exec_ctx, &(call_stack)->refcount)
+#define GRPC_CALL_STACK_UNREF(call_stack, reason) \
+  grpc_stream_unref(&(call_stack)->refcount)
 #define GRPC_CHANNEL_STACK_REF(channel_stack, reason) \
   grpc_stream_ref(&(channel_stack)->refcount)
-#define GRPC_CHANNEL_STACK_UNREF(exec_ctx, channel_stack, reason) \
-  grpc_stream_unref(exec_ctx, &(channel_stack)->refcount)
+#define GRPC_CHANNEL_STACK_UNREF(channel_stack, reason) \
+  grpc_stream_unref(&(channel_stack)->refcount)
 #endif
 
 /* Destroy a call stack */
-void grpc_call_stack_destroy(grpc_exec_ctx* exec_ctx, grpc_call_stack* stack,
+void grpc_call_stack_destroy(grpc_call_stack* stack,
                              const grpc_call_final_info* final_info,
                              grpc_closure* then_schedule_closure);
 
 /* Ignore set pollset{_set} - used by filters if they don't care about pollsets
  * at all. Does nothing. */
 void grpc_call_stack_ignore_set_pollset_or_pollset_set(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_polling_entity* pollent);
+    grpc_call_element* elem, grpc_polling_entity* pollent);
 /* Call the next operation in a call stack */
-void grpc_call_next_op(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+void grpc_call_next_op(grpc_call_element* elem,
                        grpc_transport_stream_op_batch* op);
 /* Call the next operation (depending on call directionality) in a channel
    stack */
-void grpc_channel_next_op(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-                          grpc_transport_op* op);
+void grpc_channel_next_op(grpc_channel_element* elem, grpc_transport_op* op);
 /* Pass through a request to get_channel_info() to the next child element */
-void grpc_channel_next_get_info(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_element* elem,
+void grpc_channel_next_get_info(grpc_channel_element* elem,
                                 const grpc_channel_info* channel_info);
 
 /* Given the top element of a channel stack, get the channel stack itself */
diff --git a/src/core/lib/channel/channel_stack_builder.cc b/src/core/lib/channel/channel_stack_builder.cc
index 77b7854..fcba826 100644
--- a/src/core/lib/channel/channel_stack_builder.cc
+++ b/src/core/lib/channel/channel_stack_builder.cc
@@ -150,10 +150,9 @@
 }
 
 void grpc_channel_stack_builder_set_channel_arguments(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
-    const grpc_channel_args* args) {
+    grpc_channel_stack_builder* builder, const grpc_channel_args* args) {
   if (builder->args != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, builder->args);
+    grpc_channel_args_destroy(builder->args);
   }
   builder->args = grpc_channel_args_copy(args);
 }
@@ -241,8 +240,7 @@
   return true;
 }
 
-void grpc_channel_stack_builder_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_stack_builder* builder) {
+void grpc_channel_stack_builder_destroy(grpc_channel_stack_builder* builder) {
   filter_node* p = builder->begin.next;
   while (p != &builder->end) {
     filter_node* next = p->next;
@@ -250,16 +248,15 @@
     p = next;
   }
   if (builder->args != nullptr) {
-    grpc_channel_args_destroy(exec_ctx, builder->args);
+    grpc_channel_args_destroy(builder->args);
   }
   gpr_free(builder->target);
   gpr_free(builder);
 }
 
 grpc_error* grpc_channel_stack_builder_finish(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
-    size_t prefix_bytes, int initial_refs, grpc_iomgr_cb_func destroy,
-    void* destroy_arg, void** result) {
+    grpc_channel_stack_builder* builder, size_t prefix_bytes, int initial_refs,
+    grpc_iomgr_cb_func destroy, void* destroy_arg, void** result) {
   // count the number of filters
   size_t num_filters = 0;
   for (filter_node* p = builder->begin.next; p != &builder->end; p = p->next) {
@@ -284,12 +281,12 @@
       (grpc_channel_stack*)((char*)(*result) + prefix_bytes);
   // and initialize it
   grpc_error* error = grpc_channel_stack_init(
-      exec_ctx, initial_refs, destroy,
-      destroy_arg == nullptr ? *result : destroy_arg, filters, num_filters,
-      builder->args, builder->transport, builder->name, channel_stack);
+      initial_refs, destroy, destroy_arg == nullptr ? *result : destroy_arg,
+      filters, num_filters, builder->args, builder->transport, builder->name,
+      channel_stack);
 
   if (error != GRPC_ERROR_NONE) {
-    grpc_channel_stack_destroy(exec_ctx, channel_stack);
+    grpc_channel_stack_destroy(channel_stack);
     gpr_free(*result);
     *result = nullptr;
   } else {
@@ -305,7 +302,7 @@
     }
   }
 
-  grpc_channel_stack_builder_destroy(exec_ctx, builder);
+  grpc_channel_stack_builder_destroy(builder);
   gpr_free((grpc_channel_filter**)filters);
 
   return error;
diff --git a/src/core/lib/channel/channel_stack_builder.h b/src/core/lib/channel/channel_stack_builder.h
index 1001954..d00ddc6 100644
--- a/src/core/lib/channel/channel_stack_builder.h
+++ b/src/core/lib/channel/channel_stack_builder.h
@@ -54,8 +54,7 @@
 
 /// Set channel arguments: copies args
 void grpc_channel_stack_builder_set_channel_arguments(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
-    const grpc_channel_args* args);
+    grpc_channel_stack_builder* builder, const grpc_channel_args* args);
 
 /// Return a borrowed pointer to the channel arguments
 const grpc_channel_args* grpc_channel_stack_builder_get_channel_arguments(
@@ -148,13 +147,11 @@
 /// \a initial_refs, \a destroy, \a destroy_arg are as per
 /// grpc_channel_stack_init
 grpc_error* grpc_channel_stack_builder_finish(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
-    size_t prefix_bytes, int initial_refs, grpc_iomgr_cb_func destroy,
-    void* destroy_arg, void** result);
+    grpc_channel_stack_builder* builder, size_t prefix_bytes, int initial_refs,
+    grpc_iomgr_cb_func destroy, void* destroy_arg, void** result);
 
 /// Destroy the builder without creating a channel stack
-void grpc_channel_stack_builder_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_stack_builder* builder);
+void grpc_channel_stack_builder_destroy(grpc_channel_stack_builder* builder);
 
 extern grpc_core::TraceFlag grpc_trace_channel_stack_builder;
 
diff --git a/src/core/lib/channel/connected_channel.cc b/src/core/lib/channel/connected_channel.cc
index af2f88a..9d07cff 100644
--- a/src/core/lib/channel/connected_channel.cc
+++ b/src/core/lib/channel/connected_channel.cc
@@ -51,17 +51,14 @@
   callback_state recv_message_ready;
 } call_data;
 
-static void run_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void run_in_call_combiner(void* arg, grpc_error* error) {
   callback_state* state = (callback_state*)arg;
-  GRPC_CALL_COMBINER_START(exec_ctx, state->call_combiner,
-                           state->original_closure, GRPC_ERROR_REF(error),
-                           state->reason);
+  GRPC_CALL_COMBINER_START(state->call_combiner, state->original_closure,
+                           GRPC_ERROR_REF(error), state->reason);
 }
 
-static void run_cancel_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
-  run_in_call_combiner(exec_ctx, arg, error);
+static void run_cancel_in_call_combiner(void* arg, grpc_error* error) {
+  run_in_call_combiner(arg, error);
   gpr_free(arg);
 }
 
@@ -98,8 +95,7 @@
 /* Intercept a call operation and either push it directly up or translate it
    into transport stream operations */
 static void con_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (batch->recv_initial_metadata) {
@@ -126,58 +122,52 @@
     callback_state* state = get_state_for_batch(calld, batch);
     intercept_callback(calld, state, false, "on_complete", &batch->on_complete);
   }
-  grpc_transport_perform_stream_op(exec_ctx, chand->transport,
-                                   TRANSPORT_STREAM_FROM_CALL_DATA(calld),
-                                   batch);
-  GRPC_CALL_COMBINER_STOP(exec_ctx, calld->call_combiner,
-                          "passed batch to transport");
+  grpc_transport_perform_stream_op(
+      chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld), batch);
+  GRPC_CALL_COMBINER_STOP(calld->call_combiner, "passed batch to transport");
 }
 
-static void con_start_transport_op(grpc_exec_ctx* exec_ctx,
-                                   grpc_channel_element* elem,
+static void con_start_transport_op(grpc_channel_element* elem,
                                    grpc_transport_op* op) {
   channel_data* chand = (channel_data*)elem->channel_data;
-  grpc_transport_perform_op(exec_ctx, chand->transport, op);
+  grpc_transport_perform_op(chand->transport, op);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   calld->call_combiner = args->call_combiner;
   int r = grpc_transport_init_stream(
-      exec_ctx, chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld),
+      chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld),
       &args->call_stack->refcount, args->server_transport_data, args->arena);
   return r == 0 ? GRPC_ERROR_NONE
                 : GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                       "transport stream initialization failed");
 }
 
-static void set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_call_element* elem,
+static void set_pollset_or_pollset_set(grpc_call_element* elem,
                                        grpc_polling_entity* pollent) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
-  grpc_transport_set_pops(exec_ctx, chand->transport,
+  grpc_transport_set_pops(chand->transport,
                           TRANSPORT_STREAM_FROM_CALL_DATA(calld), pollent);
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* then_schedule_closure) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
-  grpc_transport_destroy_stream(exec_ctx, chand->transport,
+  grpc_transport_destroy_stream(chand->transport,
                                 TRANSPORT_STREAM_FROM_CALL_DATA(calld),
                                 then_schedule_closure);
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* cd = (channel_data*)elem->channel_data;
   GPR_ASSERT(args->is_last);
@@ -186,17 +176,15 @@
 }
 
 /* Destructor for channel_data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* cd = (channel_data*)elem->channel_data;
   if (cd->transport) {
-    grpc_transport_destroy(exec_ctx, cd->transport);
+    grpc_transport_destroy(cd->transport);
   }
 }
 
 /* No-op. */
-static void con_get_channel_info(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem,
+static void con_get_channel_info(grpc_channel_element* elem,
                                  const grpc_channel_info* channel_info) {}
 
 const grpc_channel_filter grpc_connected_filter = {
@@ -230,8 +218,7 @@
       grpc_transport_stream_size((grpc_transport*)t);
 }
 
-bool grpc_add_connected_filter(grpc_exec_ctx* exec_ctx,
-                               grpc_channel_stack_builder* builder,
+bool grpc_add_connected_filter(grpc_channel_stack_builder* builder,
                                void* arg_must_be_null) {
   GPR_ASSERT(arg_must_be_null == nullptr);
   grpc_transport* t = grpc_channel_stack_builder_get_transport(builder);
diff --git a/src/core/lib/channel/connected_channel.h b/src/core/lib/channel/connected_channel.h
index cab8aad..91de802 100644
--- a/src/core/lib/channel/connected_channel.h
+++ b/src/core/lib/channel/connected_channel.h
@@ -23,8 +23,7 @@
 
 extern const grpc_channel_filter grpc_connected_filter;
 
-bool grpc_add_connected_filter(grpc_exec_ctx* exec_ctx,
-                               grpc_channel_stack_builder* builder,
+bool grpc_add_connected_filter(grpc_channel_stack_builder* builder,
                                void* arg_must_be_null);
 
 /* Debug helper to dig the transport stream out of a call element */
diff --git a/src/core/lib/channel/handshaker.cc b/src/core/lib/channel/handshaker.cc
index aae1b35..dcb149c 100644
--- a/src/core/lib/channel/handshaker.cc
+++ b/src/core/lib/channel/handshaker.cc
@@ -34,23 +34,20 @@
   handshaker->vtable = vtable;
 }
 
-void grpc_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                             grpc_handshaker* handshaker) {
-  handshaker->vtable->destroy(exec_ctx, handshaker);
+void grpc_handshaker_destroy(grpc_handshaker* handshaker) {
+  handshaker->vtable->destroy(handshaker);
 }
 
-void grpc_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                              grpc_handshaker* handshaker, grpc_error* why) {
-  handshaker->vtable->shutdown(exec_ctx, handshaker, why);
+void grpc_handshaker_shutdown(grpc_handshaker* handshaker, grpc_error* why) {
+  handshaker->vtable->shutdown(handshaker, why);
 }
 
-void grpc_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
-                                  grpc_handshaker* handshaker,
+void grpc_handshaker_do_handshake(grpc_handshaker* handshaker,
                                   grpc_tcp_server_acceptor* acceptor,
                                   grpc_closure* on_handshake_done,
                                   grpc_handshaker_args* args) {
-  handshaker->vtable->do_handshake(exec_ctx, handshaker, acceptor,
-                                   on_handshake_done, args);
+  handshaker->vtable->do_handshake(handshaker, acceptor, on_handshake_done,
+                                   args);
 }
 
 //
@@ -116,9 +113,9 @@
 }
 
 void grpc_handshake_manager_pending_list_shutdown_all(
-    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* head, grpc_error* why) {
+    grpc_handshake_manager* head, grpc_error* why) {
   while (head != nullptr) {
-    grpc_handshake_manager_shutdown(exec_ctx, head, GRPC_ERROR_REF(why));
+    grpc_handshake_manager_shutdown(head, GRPC_ERROR_REF(why));
     head = head->next;
   }
   GRPC_ERROR_UNREF(why);
@@ -145,11 +142,10 @@
   gpr_mu_unlock(&mgr->mu);
 }
 
-static void grpc_handshake_manager_unref(grpc_exec_ctx* exec_ctx,
-                                         grpc_handshake_manager* mgr) {
+static void grpc_handshake_manager_unref(grpc_handshake_manager* mgr) {
   if (gpr_unref(&mgr->refs)) {
     for (size_t i = 0; i < mgr->count; ++i) {
-      grpc_handshaker_destroy(exec_ctx, mgr->handshakers[i]);
+      grpc_handshaker_destroy(mgr->handshakers[i]);
     }
     gpr_free(mgr->handshakers);
     gpr_mu_destroy(&mgr->mu);
@@ -157,19 +153,17 @@
   }
 }
 
-void grpc_handshake_manager_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_handshake_manager* mgr) {
-  grpc_handshake_manager_unref(exec_ctx, mgr);
+void grpc_handshake_manager_destroy(grpc_handshake_manager* mgr) {
+  grpc_handshake_manager_unref(mgr);
 }
 
-void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
-                                     grpc_handshake_manager* mgr,
+void grpc_handshake_manager_shutdown(grpc_handshake_manager* mgr,
                                      grpc_error* why) {
   gpr_mu_lock(&mgr->mu);
   // Shutdown the handshaker that's currently in progress, if any.
   if (!mgr->shutdown && mgr->index > 0) {
     mgr->shutdown = true;
-    grpc_handshaker_shutdown(exec_ctx, mgr->handshakers[mgr->index - 1],
+    grpc_handshaker_shutdown(mgr->handshakers[mgr->index - 1],
                              GRPC_ERROR_REF(why));
   }
   gpr_mu_unlock(&mgr->mu);
@@ -179,8 +173,7 @@
 // Helper function to call either the next handshaker or the
 // on_handshake_done callback.
 // Returns true if we've scheduled the on_handshake_done callback.
-static bool call_next_handshaker_locked(grpc_exec_ctx* exec_ctx,
-                                        grpc_handshake_manager* mgr,
+static bool call_next_handshaker_locked(grpc_handshake_manager* mgr,
                                         grpc_error* error) {
   GPR_ASSERT(mgr->index <= mgr->count);
   // If we got an error or we've been shut down or we're exiting early or
@@ -190,13 +183,12 @@
       mgr->index == mgr->count) {
     // Cancel deadline timer, since we're invoking the on_handshake_done
     // callback now.
-    grpc_timer_cancel(exec_ctx, &mgr->deadline_timer);
-    GRPC_CLOSURE_SCHED(exec_ctx, &mgr->on_handshake_done, error);
+    grpc_timer_cancel(&mgr->deadline_timer);
+    GRPC_CLOSURE_SCHED(&mgr->on_handshake_done, error);
     mgr->shutdown = true;
   } else {
-    grpc_handshaker_do_handshake(exec_ctx, mgr->handshakers[mgr->index],
-                                 mgr->acceptor, &mgr->call_next_handshaker,
-                                 &mgr->args);
+    grpc_handshaker_do_handshake(mgr->handshakers[mgr->index], mgr->acceptor,
+                                 &mgr->call_next_handshaker, &mgr->args);
   }
   ++mgr->index;
   return mgr->shutdown;
@@ -204,33 +196,31 @@
 
 // A function used as the handshaker-done callback when chaining
 // handshakers together.
-static void call_next_handshaker(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void call_next_handshaker(void* arg, grpc_error* error) {
   grpc_handshake_manager* mgr = (grpc_handshake_manager*)arg;
   gpr_mu_lock(&mgr->mu);
-  bool done = call_next_handshaker_locked(exec_ctx, mgr, GRPC_ERROR_REF(error));
+  bool done = call_next_handshaker_locked(mgr, GRPC_ERROR_REF(error));
   gpr_mu_unlock(&mgr->mu);
   // If we're invoked the final callback, we won't be coming back
   // to this function, so we can release our reference to the
   // handshake manager.
   if (done) {
-    grpc_handshake_manager_unref(exec_ctx, mgr);
+    grpc_handshake_manager_unref(mgr);
   }
 }
 
 // Callback invoked when deadline is exceeded.
-static void on_timeout(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_timeout(void* arg, grpc_error* error) {
   grpc_handshake_manager* mgr = (grpc_handshake_manager*)arg;
   if (error == GRPC_ERROR_NONE) {  // Timer fired, rather than being cancelled.
     grpc_handshake_manager_shutdown(
-        exec_ctx, mgr,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Handshake timed out"));
+        mgr, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Handshake timed out"));
   }
-  grpc_handshake_manager_unref(exec_ctx, mgr);
+  grpc_handshake_manager_unref(mgr);
 }
 
 void grpc_handshake_manager_do_handshake(
-    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* mgr,
+    grpc_handshake_manager* mgr, grpc_pollset_set* interested_parties,
     grpc_endpoint* endpoint, const grpc_channel_args* channel_args,
     grpc_millis deadline, grpc_tcp_server_acceptor* acceptor,
     grpc_iomgr_cb_func on_handshake_done, void* user_data) {
@@ -239,6 +229,7 @@
   GPR_ASSERT(!mgr->shutdown);
   // Construct handshaker args.  These will be passed through all
   // handshakers and eventually be freed by the on_handshake_done callback.
+  mgr->args.interested_parties = interested_parties;
   mgr->args.endpoint = endpoint;
   mgr->args.args = grpc_channel_args_copy(channel_args);
   mgr->args.user_data = user_data;
@@ -255,12 +246,12 @@
   gpr_ref(&mgr->refs);
   GRPC_CLOSURE_INIT(&mgr->on_timeout, on_timeout, mgr,
                     grpc_schedule_on_exec_ctx);
-  grpc_timer_init(exec_ctx, &mgr->deadline_timer, deadline, &mgr->on_timeout);
+  grpc_timer_init(&mgr->deadline_timer, deadline, &mgr->on_timeout);
   // Start first handshaker, which also owns a ref.
   gpr_ref(&mgr->refs);
-  bool done = call_next_handshaker_locked(exec_ctx, mgr, GRPC_ERROR_NONE);
+  bool done = call_next_handshaker_locked(mgr, GRPC_ERROR_NONE);
   gpr_mu_unlock(&mgr->mu);
   if (done) {
-    grpc_handshake_manager_unref(exec_ctx, mgr);
+    grpc_handshake_manager_unref(mgr);
   }
 }
diff --git a/src/core/lib/channel/handshaker.h b/src/core/lib/channel/handshaker.h
index 09b4a27..68e5463 100644
--- a/src/core/lib/channel/handshaker.h
+++ b/src/core/lib/channel/handshaker.h
@@ -54,6 +54,7 @@
 /// For the on_handshake_done callback, all members are input arguments,
 /// which the callback takes ownership of.
 typedef struct {
+  grpc_pollset_set* interested_parties;
   grpc_endpoint* endpoint;
   grpc_channel_args* args;
   grpc_slice_buffer* read_buffer;
@@ -67,18 +68,17 @@
 
 typedef struct {
   /// Destroys the handshaker.
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker);
+  void (*destroy)(grpc_handshaker* handshaker);
 
   /// Shuts down the handshaker (e.g., to clean up when the operation is
   /// aborted in the middle).
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker,
-                   grpc_error* why);
+  void (*shutdown)(grpc_handshaker* handshaker, grpc_error* why);
 
   /// Performs handshaking, modifying \a args as needed (e.g., to
   /// replace \a endpoint with a wrapped endpoint).
   /// When finished, invokes \a on_handshake_done.
   /// \a acceptor will be NULL for client-side handshakers.
-  void (*do_handshake)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker,
+  void (*do_handshake)(grpc_handshaker* handshaker,
                        grpc_tcp_server_acceptor* acceptor,
                        grpc_closure* on_handshake_done,
                        grpc_handshaker_args* args);
@@ -94,12 +94,9 @@
 void grpc_handshaker_init(const grpc_handshaker_vtable* vtable,
                           grpc_handshaker* handshaker);
 
-void grpc_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                             grpc_handshaker* handshaker);
-void grpc_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                              grpc_handshaker* handshaker, grpc_error* why);
-void grpc_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
-                                  grpc_handshaker* handshaker,
+void grpc_handshaker_destroy(grpc_handshaker* handshaker);
+void grpc_handshaker_shutdown(grpc_handshaker* handshaker, grpc_error* why);
+void grpc_handshaker_do_handshake(grpc_handshaker* handshaker,
                                   grpc_tcp_server_acceptor* acceptor,
                                   grpc_closure* on_handshake_done,
                                   grpc_handshaker_args* args);
@@ -119,23 +116,23 @@
                                 grpc_handshaker* handshaker);
 
 /// Destroys the handshake manager.
-void grpc_handshake_manager_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_handshake_manager* mgr);
+void grpc_handshake_manager_destroy(grpc_handshake_manager* mgr);
 
 /// Shuts down the handshake manager (e.g., to clean up when the operation is
 /// aborted in the middle).
 /// The caller must still call grpc_handshake_manager_destroy() after
 /// calling this function.
-void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
-                                     grpc_handshake_manager* mgr,
+void grpc_handshake_manager_shutdown(grpc_handshake_manager* mgr,
                                      grpc_error* why);
 
 /// Invokes handshakers in the order they were added.
+/// \a interested_parties may be non-nullptr to provide a pollset_set that
+/// may be used during handshaking. Ownership is not taken.
 /// Takes ownership of \a endpoint, and then passes that ownership to
 /// the \a on_handshake_done callback.
 /// Does NOT take ownership of \a channel_args.  Instead, makes a copy before
 /// invoking the first handshaker.
-/// \a acceptor will be NULL for client-side handshakers.
+/// \a acceptor will be nullptr for client-side handshakers.
 ///
 /// When done, invokes \a on_handshake_done with a grpc_handshaker_args
 /// object as its argument.  If the callback is invoked with error !=
@@ -143,7 +140,7 @@
 /// the necessary clean-up.  Otherwise, the callback takes ownership of
 /// the arguments.
 void grpc_handshake_manager_do_handshake(
-    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* mgr,
+    grpc_handshake_manager* mgr, grpc_pollset_set* interested_parties,
     grpc_endpoint* endpoint, const grpc_channel_args* channel_args,
     grpc_millis deadline, grpc_tcp_server_acceptor* acceptor,
     grpc_iomgr_cb_func on_handshake_done, void* user_data);
@@ -162,6 +159,6 @@
 /// Shutdown all pending handshake managers on the server side.
 // Not thread-safe. Caller needs to synchronize.
 void grpc_handshake_manager_pending_list_shutdown_all(
-    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* head, grpc_error* why);
+    grpc_handshake_manager* head, grpc_error* why);
 
 #endif /* GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H */
diff --git a/src/core/lib/channel/handshaker_factory.cc b/src/core/lib/channel/handshaker_factory.cc
index 015006a..2380d98 100644
--- a/src/core/lib/channel/handshaker_factory.cc
+++ b/src/core/lib/channel/handshaker_factory.cc
@@ -21,19 +21,19 @@
 #include <grpc/support/log.h>
 
 void grpc_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory* handshaker_factory, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   if (handshaker_factory != nullptr) {
     GPR_ASSERT(handshaker_factory->vtable != nullptr);
-    handshaker_factory->vtable->add_handshakers(exec_ctx, handshaker_factory,
-                                                args, handshake_mgr);
+    handshaker_factory->vtable->add_handshakers(handshaker_factory, args,
+                                                handshake_mgr);
   }
 }
 
 void grpc_handshaker_factory_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory) {
+    grpc_handshaker_factory* handshaker_factory) {
   if (handshaker_factory != nullptr) {
     GPR_ASSERT(handshaker_factory->vtable != nullptr);
-    handshaker_factory->vtable->destroy(exec_ctx, handshaker_factory);
+    handshaker_factory->vtable->destroy(handshaker_factory);
   }
 }
diff --git a/src/core/lib/channel/handshaker_factory.h b/src/core/lib/channel/handshaker_factory.h
index ca7c26b..8a7c015 100644
--- a/src/core/lib/channel/handshaker_factory.h
+++ b/src/core/lib/channel/handshaker_factory.h
@@ -29,12 +29,10 @@
 typedef struct grpc_handshaker_factory grpc_handshaker_factory;
 
 typedef struct {
-  void (*add_handshakers)(grpc_exec_ctx* exec_ctx,
-                          grpc_handshaker_factory* handshaker_factory,
+  void (*add_handshakers)(grpc_handshaker_factory* handshaker_factory,
                           const grpc_channel_args* args,
                           grpc_handshake_manager* handshake_mgr);
-  void (*destroy)(grpc_exec_ctx* exec_ctx,
-                  grpc_handshaker_factory* handshaker_factory);
+  void (*destroy)(grpc_handshaker_factory* handshaker_factory);
 } grpc_handshaker_factory_vtable;
 
 struct grpc_handshaker_factory {
@@ -42,10 +40,10 @@
 };
 
 void grpc_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr);
+    grpc_handshaker_factory* handshaker_factory, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr);
 
 void grpc_handshaker_factory_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory);
+    grpc_handshaker_factory* handshaker_factory);
 
 #endif /* GRPC_CORE_LIB_CHANNEL_HANDSHAKER_FACTORY_H */
diff --git a/src/core/lib/channel/handshaker_registry.cc b/src/core/lib/channel/handshaker_registry.cc
index c6bc87d..098eabf 100644
--- a/src/core/lib/channel/handshaker_registry.cc
+++ b/src/core/lib/channel/handshaker_registry.cc
@@ -47,18 +47,17 @@
 }
 
 static void grpc_handshaker_factory_list_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory_list* list,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory_list* list, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   for (size_t i = 0; i < list->num_factories; ++i) {
-    grpc_handshaker_factory_add_handshakers(exec_ctx, list->list[i], args,
-                                            handshake_mgr);
+    grpc_handshaker_factory_add_handshakers(list->list[i], args, handshake_mgr);
   }
 }
 
 static void grpc_handshaker_factory_list_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory_list* list) {
+    grpc_handshaker_factory_list* list) {
   for (size_t i = 0; i < list->num_factories; ++i) {
-    grpc_handshaker_factory_destroy(exec_ctx, list->list[i]);
+    grpc_handshaker_factory_destroy(list->list[i]);
   }
   gpr_free(list->list);
 }
@@ -74,10 +73,9 @@
   memset(g_handshaker_factory_lists, 0, sizeof(g_handshaker_factory_lists));
 }
 
-void grpc_handshaker_factory_registry_shutdown(grpc_exec_ctx* exec_ctx) {
+void grpc_handshaker_factory_registry_shutdown() {
   for (size_t i = 0; i < NUM_HANDSHAKER_TYPES; ++i) {
-    grpc_handshaker_factory_list_destroy(exec_ctx,
-                                         &g_handshaker_factory_lists[i]);
+    grpc_handshaker_factory_list_destroy(&g_handshaker_factory_lists[i]);
   }
 }
 
@@ -88,11 +86,9 @@
       &g_handshaker_factory_lists[handshaker_type], at_start, factory);
 }
 
-void grpc_handshakers_add(grpc_exec_ctx* exec_ctx,
-                          grpc_handshaker_type handshaker_type,
+void grpc_handshakers_add(grpc_handshaker_type handshaker_type,
                           const grpc_channel_args* args,
                           grpc_handshake_manager* handshake_mgr) {
   grpc_handshaker_factory_list_add_handshakers(
-      exec_ctx, &g_handshaker_factory_lists[handshaker_type], args,
-      handshake_mgr);
+      &g_handshaker_factory_lists[handshaker_type], args, handshake_mgr);
 }
diff --git a/src/core/lib/channel/handshaker_registry.h b/src/core/lib/channel/handshaker_registry.h
index a3b2ac1..0b05531 100644
--- a/src/core/lib/channel/handshaker_registry.h
+++ b/src/core/lib/channel/handshaker_registry.h
@@ -31,7 +31,7 @@
 } grpc_handshaker_type;
 
 void grpc_handshaker_factory_registry_init();
-void grpc_handshaker_factory_registry_shutdown(grpc_exec_ctx* exec_ctx);
+void grpc_handshaker_factory_registry_shutdown();
 
 /// Registers a new handshaker factory.  Takes ownership.
 /// If \a at_start is true, the new handshaker will be at the beginning of
@@ -40,8 +40,7 @@
                                       grpc_handshaker_type handshaker_type,
                                       grpc_handshaker_factory* factory);
 
-void grpc_handshakers_add(grpc_exec_ctx* exec_ctx,
-                          grpc_handshaker_type handshaker_type,
+void grpc_handshakers_add(grpc_handshaker_type handshaker_type,
                           const grpc_channel_args* args,
                           grpc_handshake_manager* handshake_mgr);
 
diff --git a/src/core/lib/compression/message_compress.cc b/src/core/lib/compression/message_compress.cc
index c051e28..aa43a53 100644
--- a/src/core/lib/compression/message_compress.cc
+++ b/src/core/lib/compression/message_compress.cc
@@ -29,8 +29,8 @@
 
 #define OUTPUT_BLOCK_SIZE 1024
 
-static int zlib_body(grpc_exec_ctx* exec_ctx, z_stream* zs,
-                     grpc_slice_buffer* input, grpc_slice_buffer* output,
+static int zlib_body(z_stream* zs, grpc_slice_buffer* input,
+                     grpc_slice_buffer* output,
                      int (*flate)(z_stream* zs, int flush)) {
   int r;
   int flush;
@@ -74,7 +74,7 @@
   return 1;
 
 error:
-  grpc_slice_unref_internal(exec_ctx, outbuf);
+  grpc_slice_unref_internal(outbuf);
   return 0;
 }
 
@@ -84,8 +84,8 @@
 
 static void zfree_gpr(void* opaque, void* address) { gpr_free(address); }
 
-static int zlib_compress(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* input,
-                         grpc_slice_buffer* output, int gzip) {
+static int zlib_compress(grpc_slice_buffer* input, grpc_slice_buffer* output,
+                         int gzip) {
   z_stream zs;
   int r;
   size_t i;
@@ -97,11 +97,10 @@
   r = deflateInit2(&zs, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 15 | (gzip ? 16 : 0),
                    8, Z_DEFAULT_STRATEGY);
   GPR_ASSERT(r == Z_OK);
-  r = zlib_body(exec_ctx, &zs, input, output, deflate) &&
-      output->length < input->length;
+  r = zlib_body(&zs, input, output, deflate) && output->length < input->length;
   if (!r) {
     for (i = count_before; i < output->count; i++) {
-      grpc_slice_unref_internal(exec_ctx, output->slices[i]);
+      grpc_slice_unref_internal(output->slices[i]);
     }
     output->count = count_before;
     output->length = length_before;
@@ -110,8 +109,8 @@
   return r;
 }
 
-static int zlib_decompress(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* input,
-                           grpc_slice_buffer* output, int gzip) {
+static int zlib_decompress(grpc_slice_buffer* input, grpc_slice_buffer* output,
+                           int gzip) {
   z_stream zs;
   int r;
   size_t i;
@@ -122,10 +121,10 @@
   zs.zfree = zfree_gpr;
   r = inflateInit2(&zs, 15 | (gzip ? 16 : 0));
   GPR_ASSERT(r == Z_OK);
-  r = zlib_body(exec_ctx, &zs, input, output, inflate);
+  r = zlib_body(&zs, input, output, inflate);
   if (!r) {
     for (i = count_before; i < output->count; i++) {
-      grpc_slice_unref_internal(exec_ctx, output->slices[i]);
+      grpc_slice_unref_internal(output->slices[i]);
     }
     output->count = count_before;
     output->length = length_before;
@@ -142,8 +141,7 @@
   return 1;
 }
 
-static int compress_inner(grpc_exec_ctx* exec_ctx,
-                          grpc_compression_algorithm algorithm,
+static int compress_inner(grpc_compression_algorithm algorithm,
                           grpc_slice_buffer* input, grpc_slice_buffer* output) {
   switch (algorithm) {
     case GRPC_COMPRESS_NONE:
@@ -151,9 +149,9 @@
          rely on that here */
       return 0;
     case GRPC_COMPRESS_DEFLATE:
-      return zlib_compress(exec_ctx, input, output, 0);
+      return zlib_compress(input, output, 0);
     case GRPC_COMPRESS_GZIP:
-      return zlib_compress(exec_ctx, input, output, 1);
+      return zlib_compress(input, output, 1);
     case GRPC_COMPRESS_ALGORITHMS_COUNT:
       break;
   }
@@ -161,26 +159,24 @@
   return 0;
 }
 
-int grpc_msg_compress(grpc_exec_ctx* exec_ctx,
-                      grpc_compression_algorithm algorithm,
+int grpc_msg_compress(grpc_compression_algorithm algorithm,
                       grpc_slice_buffer* input, grpc_slice_buffer* output) {
-  if (!compress_inner(exec_ctx, algorithm, input, output)) {
+  if (!compress_inner(algorithm, input, output)) {
     copy(input, output);
     return 0;
   }
   return 1;
 }
 
-int grpc_msg_decompress(grpc_exec_ctx* exec_ctx,
-                        grpc_compression_algorithm algorithm,
+int grpc_msg_decompress(grpc_compression_algorithm algorithm,
                         grpc_slice_buffer* input, grpc_slice_buffer* output) {
   switch (algorithm) {
     case GRPC_COMPRESS_NONE:
       return copy(input, output);
     case GRPC_COMPRESS_DEFLATE:
-      return zlib_decompress(exec_ctx, input, output, 0);
+      return zlib_decompress(input, output, 0);
     case GRPC_COMPRESS_GZIP:
-      return zlib_decompress(exec_ctx, input, output, 1);
+      return zlib_decompress(input, output, 1);
     case GRPC_COMPRESS_ALGORITHMS_COUNT:
       break;
   }
diff --git a/src/core/lib/compression/message_compress.h b/src/core/lib/compression/message_compress.h
index ca8ca37..c963fcc 100644
--- a/src/core/lib/compression/message_compress.h
+++ b/src/core/lib/compression/message_compress.h
@@ -25,15 +25,13 @@
 /* compress 'input' to 'output' using 'algorithm'.
    On success, appends compressed slices to output and returns 1.
    On failure, appends uncompressed slices to output and returns 0. */
-int grpc_msg_compress(grpc_exec_ctx* exec_ctx,
-                      grpc_compression_algorithm algorithm,
+int grpc_msg_compress(grpc_compression_algorithm algorithm,
                       grpc_slice_buffer* input, grpc_slice_buffer* output);
 
 /* decompress 'input' to 'output' using 'algorithm'.
    On success, appends slices to output and returns 1.
    On failure, output is unchanged, and returns 0. */
-int grpc_msg_decompress(grpc_exec_ctx* exec_ctx,
-                        grpc_compression_algorithm algorithm,
+int grpc_msg_decompress(grpc_compression_algorithm algorithm,
                         grpc_slice_buffer* input, grpc_slice_buffer* output);
 
 #endif /* GRPC_CORE_LIB_COMPRESSION_MESSAGE_COMPRESS_H */
diff --git a/src/core/lib/compression/stream_compression_gzip.cc b/src/core/lib/compression/stream_compression_gzip.cc
index 0c3fdd1..9d829b3 100644
--- a/src/core/lib/compression/stream_compression_gzip.cc
+++ b/src/core/lib/compression/stream_compression_gzip.cc
@@ -40,7 +40,7 @@
   /* Full flush is not allowed when inflating. */
   GPR_ASSERT(!(ctx->flate == inflate && (flush == Z_FINISH)));
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   int r;
   bool eoc = false;
   size_t original_max_output_size = max_output_size;
@@ -57,8 +57,8 @@
       r = ctx->flate(&ctx->zs, Z_NO_FLUSH);
       if (r < 0 && r != Z_BUF_ERROR) {
         gpr_log(GPR_ERROR, "zlib error (%d)", r);
-        grpc_slice_unref_internal(&exec_ctx, slice_out);
-        grpc_exec_ctx_finish(&exec_ctx);
+        grpc_slice_unref_internal(slice_out);
+
         return false;
       } else if (r == Z_STREAM_END && ctx->flate == inflate) {
         eoc = true;
@@ -69,7 +69,7 @@
             grpc_slice_sub(slice, GRPC_SLICE_LENGTH(slice) - ctx->zs.avail_in,
                            GRPC_SLICE_LENGTH(slice)));
       }
-      grpc_slice_unref_internal(&exec_ctx, slice);
+      grpc_slice_unref_internal(slice);
     }
     if (flush != 0 && ctx->zs.avail_out > 0 && !eoc) {
       GPR_ASSERT(in->length == 0);
@@ -88,8 +88,8 @@
             break;
           default:
             gpr_log(GPR_ERROR, "zlib error (%d)", r);
-            grpc_slice_unref_internal(&exec_ctx, slice_out);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_slice_unref_internal(slice_out);
+
             return false;
         }
       } else if (flush == Z_FINISH) {
@@ -104,8 +104,8 @@
             break;
           default:
             gpr_log(GPR_ERROR, "zlib error (%d)", r);
-            grpc_slice_unref_internal(&exec_ctx, slice_out);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_slice_unref_internal(slice_out);
+
             return false;
         }
       }
@@ -117,11 +117,11 @@
       slice_out.data.refcounted.length -= ctx->zs.avail_out;
       grpc_slice_buffer_add(out, slice_out);
     } else {
-      grpc_slice_unref_internal(&exec_ctx, slice_out);
+      grpc_slice_unref_internal(slice_out);
     }
     max_output_size -= (slice_size - ctx->zs.avail_out);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   if (end_of_context) {
     *end_of_context = eoc;
   }
diff --git a/src/core/lib/debug/stats.cc b/src/core/lib/debug/stats.cc
index 7d2af71..0b39b2b 100644
--- a/src/core/lib/debug/stats.cc
+++ b/src/core/lib/debug/stats.cc
@@ -62,9 +62,9 @@
   }
 }
 
-int grpc_stats_histo_find_bucket_slow(grpc_exec_ctx* exec_ctx, int value,
-                                      const int* table, int table_size) {
-  GRPC_STATS_INC_HISTOGRAM_SLOW_LOOKUPS(exec_ctx);
+int grpc_stats_histo_find_bucket_slow(int value, const int* table,
+                                      int table_size) {
+  GRPC_STATS_INC_HISTOGRAM_SLOW_LOOKUPS();
   const int* const start = table;
   while (table_size > 0) {
     int step = table_size / 2;
diff --git a/src/core/lib/debug/stats.h b/src/core/lib/debug/stats.h
index 55db44e..02eed5e 100644
--- a/src/core/lib/debug/stats.h
+++ b/src/core/lib/debug/stats.h
@@ -30,17 +30,15 @@
 
 extern grpc_stats_data* grpc_stats_per_cpu_storage;
 
-#define GRPC_THREAD_STATS_DATA(exec_ctx) \
-  (&grpc_stats_per_cpu_storage[(exec_ctx)->starting_cpu])
+#define GRPC_THREAD_STATS_DATA() \
+  (&grpc_stats_per_cpu_storage[grpc_core::ExecCtx::Get()->starting_cpu()])
 
-#define GRPC_STATS_INC_COUNTER(exec_ctx, ctr) \
-  (gpr_atm_no_barrier_fetch_add(              \
-      &GRPC_THREAD_STATS_DATA((exec_ctx))->counters[(ctr)], 1))
+#define GRPC_STATS_INC_COUNTER(ctr) \
+  (gpr_atm_no_barrier_fetch_add(&GRPC_THREAD_STATS_DATA()->counters[(ctr)], 1))
 
-#define GRPC_STATS_INC_HISTOGRAM(exec_ctx, histogram, index) \
-  (gpr_atm_no_barrier_fetch_add(                             \
-      &GRPC_THREAD_STATS_DATA((exec_ctx))                    \
-           ->histograms[histogram##_FIRST_SLOT + (index)],   \
+#define GRPC_STATS_INC_HISTOGRAM(histogram, index)                             \
+  (gpr_atm_no_barrier_fetch_add(                                               \
+      &GRPC_THREAD_STATS_DATA()->histograms[histogram##_FIRST_SLOT + (index)], \
       1))
 
 void grpc_stats_init(void);
@@ -50,8 +48,8 @@
 void grpc_stats_diff(const grpc_stats_data* b, const grpc_stats_data* a,
                      grpc_stats_data* c);
 char* grpc_stats_data_as_json(const grpc_stats_data* data);
-int grpc_stats_histo_find_bucket_slow(grpc_exec_ctx* exec_ctx, int value,
-                                      const int* table, int table_size);
+int grpc_stats_histo_find_bucket_slow(int value, const int* table,
+                                      int table_size);
 double grpc_stats_histo_percentile(const grpc_stats_data* data,
                                    grpc_stats_histograms histogram,
                                    double percentile);
diff --git a/src/core/lib/debug/stats_data.cc b/src/core/lib/debug/stats_data.cc
index 17e15f4..996ed3d 100644
--- a/src/core/lib/debug/stats_data.cc
+++ b/src/core/lib/debug/stats_data.cc
@@ -342,11 +342,10 @@
     42, 42, 43, 44, 44, 45, 46, 46, 47, 48, 48, 49, 49, 50, 50, 51, 51};
 const int grpc_stats_table_8[9] = {0, 1, 2, 4, 7, 13, 23, 39, 64};
 const uint8_t grpc_stats_table_9[9] = {0, 0, 1, 2, 2, 3, 4, 4, 5};
-void grpc_stats_inc_call_initial_size(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_call_initial_size(int value) {
   value = GPR_CLAMP(value, 0, 262144);
   if (value < 6) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
-                             value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE, value);
     return;
   }
   union {
@@ -359,19 +358,17 @@
         grpc_stats_table_1[((_val.uint - 4618441417868443648ull) >> 49)] + 6;
     _bkt.dbl = grpc_stats_table_0[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
-                             bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_0, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_CALL_INITIAL_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_0, 64));
 }
-void grpc_stats_inc_poll_events_returned(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_poll_events_returned(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 29) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, value);
     return;
   }
   union {
@@ -384,204 +381,17 @@
         grpc_stats_table_3[((_val.uint - 4628855992006737920ull) >> 47)] + 29;
     _bkt.dbl = grpc_stats_table_2[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, bucket);
-    return;
-  }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_2, 128));
-}
-void grpc_stats_inc_tcp_write_size(grpc_exec_ctx* exec_ctx, int value) {
-  value = GPR_CLAMP(value, 0, 16777216);
-  if (value < 5) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
-                             value);
-    return;
-  }
-  union {
-    double dbl;
-    uint64_t uint;
-  } _val, _bkt;
-  _val.dbl = value;
-  if (_val.uint < 4683743612465315840ull) {
-    int bucket =
-        grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
-    _bkt.dbl = grpc_stats_table_4[bucket];
-    bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
-                             bucket);
-    return;
-  }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_4, 64));
-}
-void grpc_stats_inc_tcp_write_iov_size(grpc_exec_ctx* exec_ctx, int value) {
-  value = GPR_CLAMP(value, 0, 1024);
-  if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE, value);
-    return;
-  }
-  union {
-    double dbl;
-    uint64_t uint;
-  } _val, _bkt;
-  _val.dbl = value;
-  if (_val.uint < 4637863191261478912ull) {
-    int bucket =
-        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_6[bucket];
-    bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE, bucket);
-    return;
-  }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_6, 64));
-}
-void grpc_stats_inc_tcp_read_size(grpc_exec_ctx* exec_ctx, int value) {
-  value = GPR_CLAMP(value, 0, 16777216);
-  if (value < 5) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
-                             value);
-    return;
-  }
-  union {
-    double dbl;
-    uint64_t uint;
-  } _val, _bkt;
-  _val.dbl = value;
-  if (_val.uint < 4683743612465315840ull) {
-    int bucket =
-        grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
-    _bkt.dbl = grpc_stats_table_4[bucket];
-    bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
-                             bucket);
-    return;
-  }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_4, 64));
-}
-void grpc_stats_inc_tcp_read_offer(grpc_exec_ctx* exec_ctx, int value) {
-  value = GPR_CLAMP(value, 0, 16777216);
-  if (value < 5) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
-                             value);
-    return;
-  }
-  union {
-    double dbl;
-    uint64_t uint;
-  } _val, _bkt;
-  _val.dbl = value;
-  if (_val.uint < 4683743612465315840ull) {
-    int bucket =
-        grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
-    _bkt.dbl = grpc_stats_table_4[bucket];
-    bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
-                             bucket);
-    return;
-  }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_4, 64));
-}
-void grpc_stats_inc_tcp_read_offer_iov_size(grpc_exec_ctx* exec_ctx,
-                                            int value) {
-  value = GPR_CLAMP(value, 0, 1024);
-  if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE, value);
-    return;
-  }
-  union {
-    double dbl;
-    uint64_t uint;
-  } _val, _bkt;
-  _val.dbl = value;
-  if (_val.uint < 4637863191261478912ull) {
-    int bucket =
-        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_6[bucket];
-    bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE, bucket);
-    return;
-  }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_6, 64));
-}
-void grpc_stats_inc_http2_send_message_size(grpc_exec_ctx* exec_ctx,
-                                            int value) {
-  value = GPR_CLAMP(value, 0, 16777216);
-  if (value < 5) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE, value);
-    return;
-  }
-  union {
-    double dbl;
-    uint64_t uint;
-  } _val, _bkt;
-  _val.dbl = value;
-  if (_val.uint < 4683743612465315840ull) {
-    int bucket =
-        grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
-    _bkt.dbl = grpc_stats_table_4[bucket];
-    bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE, bucket);
-    return;
-  }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_4, 64));
-}
-void grpc_stats_inc_http2_send_initial_metadata_per_write(
-    grpc_exec_ctx* exec_ctx, int value) {
-  value = GPR_CLAMP(value, 0, 1024);
-  if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE,
-        value);
-    return;
-  }
-  union {
-    double dbl;
-    uint64_t uint;
-  } _val, _bkt;
-  _val.dbl = value;
-  if (_val.uint < 4637863191261478912ull) {
-    int bucket =
-        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_6[bucket];
-    bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE,
-        bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED, bucket);
     return;
   }
   GRPC_STATS_INC_HISTOGRAM(
-      (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE,
-      grpc_stats_histo_find_bucket_slow((exec_ctx), value, grpc_stats_table_6,
-                                        64));
+      GRPC_STATS_HISTOGRAM_POLL_EVENTS_RETURNED,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_2, 128));
 }
-void grpc_stats_inc_http2_send_message_per_write(grpc_exec_ctx* exec_ctx,
-                                                 int value) {
-  value = GPR_CLAMP(value, 0, 1024);
-  if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE, value);
+void grpc_stats_inc_tcp_write_size(int value) {
+  value = GPR_CLAMP(value, 0, 16777216);
+  if (value < 5) {
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE, value);
     return;
   }
   union {
@@ -589,55 +399,142 @@
     uint64_t uint;
   } _val, _bkt;
   _val.dbl = value;
-  if (_val.uint < 4637863191261478912ull) {
+  if (_val.uint < 4683743612465315840ull) {
     int bucket =
-        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_6[bucket];
+        grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
+    _bkt.dbl = grpc_stats_table_4[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE, bucket);
-    return;
-  }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_6, 64));
-}
-void grpc_stats_inc_http2_send_trailing_metadata_per_write(
-    grpc_exec_ctx* exec_ctx, int value) {
-  value = GPR_CLAMP(value, 0, 1024);
-  if (value < 13) {
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
-        value);
-    return;
-  }
-  union {
-    double dbl;
-    uint64_t uint;
-  } _val, _bkt;
-  _val.dbl = value;
-  if (_val.uint < 4637863191261478912ull) {
-    int bucket =
-        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
-    _bkt.dbl = grpc_stats_table_6[bucket];
-    bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
-        bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE, bucket);
     return;
   }
   GRPC_STATS_INC_HISTOGRAM(
-      (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
-      grpc_stats_histo_find_bucket_slow((exec_ctx), value, grpc_stats_table_6,
-                                        64));
+      GRPC_STATS_HISTOGRAM_TCP_WRITE_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_4, 64));
 }
-void grpc_stats_inc_http2_send_flowctl_per_write(grpc_exec_ctx* exec_ctx,
-                                                 int value) {
+void grpc_stats_inc_tcp_write_iov_size(int value) {
+  value = GPR_CLAMP(value, 0, 1024);
+  if (value < 13) {
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE, value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4637863191261478912ull) {
+    int bucket =
+        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
+    _bkt.dbl = grpc_stats_table_6[bucket];
+    bucket -= (_val.uint < _bkt.uint);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE, bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_WRITE_IOV_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
+}
+void grpc_stats_inc_tcp_read_size(int value) {
+  value = GPR_CLAMP(value, 0, 16777216);
+  if (value < 5) {
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_SIZE, value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4683743612465315840ull) {
+    int bucket =
+        grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
+    _bkt.dbl = grpc_stats_table_4[bucket];
+    bucket -= (_val.uint < _bkt.uint);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_SIZE, bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_READ_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_4, 64));
+}
+void grpc_stats_inc_tcp_read_offer(int value) {
+  value = GPR_CLAMP(value, 0, 16777216);
+  if (value < 5) {
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_OFFER, value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4683743612465315840ull) {
+    int bucket =
+        grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
+    _bkt.dbl = grpc_stats_table_4[bucket];
+    bucket -= (_val.uint < _bkt.uint);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_OFFER, bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_READ_OFFER,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_4, 64));
+}
+void grpc_stats_inc_tcp_read_offer_iov_size(int value) {
+  value = GPR_CLAMP(value, 0, 1024);
+  if (value < 13) {
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE,
+                             value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4637863191261478912ull) {
+    int bucket =
+        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
+    _bkt.dbl = grpc_stats_table_6[bucket];
+    bucket -= (_val.uint < _bkt.uint);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE,
+                             bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_TCP_READ_OFFER_IOV_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
+}
+void grpc_stats_inc_http2_send_message_size(int value) {
+  value = GPR_CLAMP(value, 0, 16777216);
+  if (value < 5) {
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE,
+                             value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4683743612465315840ull) {
+    int bucket =
+        grpc_stats_table_5[((_val.uint - 4617315517961601024ull) >> 50)] + 5;
+    _bkt.dbl = grpc_stats_table_4[bucket];
+    bucket -= (_val.uint < _bkt.uint);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE,
+                             bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_SIZE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_4, 64));
+}
+void grpc_stats_inc_http2_send_initial_metadata_per_write(int value) {
   value = GPR_CLAMP(value, 0, 1024);
   if (value < 13) {
     GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE, value);
+        GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE, value);
     return;
   }
   union {
@@ -651,19 +548,92 @@
     _bkt.dbl = grpc_stats_table_6[bucket];
     bucket -= (_val.uint < _bkt.uint);
     GRPC_STATS_INC_HISTOGRAM(
-        (exec_ctx), GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE, bucket);
+        GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                           GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_6, 64));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_INITIAL_METADATA_PER_WRITE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
 }
-void grpc_stats_inc_server_cqs_checked(grpc_exec_ctx* exec_ctx, int value) {
+void grpc_stats_inc_http2_send_message_per_write(int value) {
+  value = GPR_CLAMP(value, 0, 1024);
+  if (value < 13) {
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
+                             value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4637863191261478912ull) {
+    int bucket =
+        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
+    _bkt.dbl = grpc_stats_table_6[bucket];
+    bucket -= (_val.uint < _bkt.uint);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
+                             bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_MESSAGE_PER_WRITE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
+}
+void grpc_stats_inc_http2_send_trailing_metadata_per_write(int value) {
+  value = GPR_CLAMP(value, 0, 1024);
+  if (value < 13) {
+    GRPC_STATS_INC_HISTOGRAM(
+        GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE, value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4637863191261478912ull) {
+    int bucket =
+        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
+    _bkt.dbl = grpc_stats_table_6[bucket];
+    bucket -= (_val.uint < _bkt.uint);
+    GRPC_STATS_INC_HISTOGRAM(
+        GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE, bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_TRAILING_METADATA_PER_WRITE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
+}
+void grpc_stats_inc_http2_send_flowctl_per_write(int value) {
+  value = GPR_CLAMP(value, 0, 1024);
+  if (value < 13) {
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
+                             value);
+    return;
+  }
+  union {
+    double dbl;
+    uint64_t uint;
+  } _val, _bkt;
+  _val.dbl = value;
+  if (_val.uint < 4637863191261478912ull) {
+    int bucket =
+        grpc_stats_table_7[((_val.uint - 4623507967449235456ull) >> 48)] + 13;
+    _bkt.dbl = grpc_stats_table_6[bucket];
+    bucket -= (_val.uint < _bkt.uint);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
+                             bucket);
+    return;
+  }
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_HTTP2_SEND_FLOWCTL_PER_WRITE,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_6, 64));
+}
+void grpc_stats_inc_server_cqs_checked(int value) {
   value = GPR_CLAMP(value, 0, 64);
   if (value < 3) {
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, value);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, value);
     return;
   }
   union {
@@ -676,13 +646,12 @@
         grpc_stats_table_9[((_val.uint - 4613937818241073152ull) >> 51)] + 3;
     _bkt.dbl = grpc_stats_table_8[bucket];
     bucket -= (_val.uint < _bkt.uint);
-    GRPC_STATS_INC_HISTOGRAM((exec_ctx),
-                             GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, bucket);
+    GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED, bucket);
     return;
   }
-  GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED,
-                           grpc_stats_histo_find_bucket_slow(
-                               (exec_ctx), value, grpc_stats_table_8, 8));
+  GRPC_STATS_INC_HISTOGRAM(
+      GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED,
+      grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_8, 8));
 }
 const int grpc_stats_histo_buckets[13] = {64, 128, 64, 64, 64, 64, 64,
                                           64, 64,  64, 64, 64, 8};
@@ -694,7 +663,7 @@
     grpc_stats_table_6, grpc_stats_table_4, grpc_stats_table_6,
     grpc_stats_table_6, grpc_stats_table_6, grpc_stats_table_6,
     grpc_stats_table_8};
-void (*const grpc_stats_inc_histogram[13])(grpc_exec_ctx* exec_ctx, int x) = {
+void (*const grpc_stats_inc_histogram[13])(int x) = {
     grpc_stats_inc_call_initial_size,
     grpc_stats_inc_poll_events_returned,
     grpc_stats_inc_tcp_write_size,
diff --git a/src/core/lib/debug/stats_data.h b/src/core/lib/debug/stats_data.h
index 8a5bc97..4504be3 100644
--- a/src/core/lib/debug/stats_data.h
+++ b/src/core/lib/debug/stats_data.h
@@ -172,330 +172,262 @@
   GRPC_STATS_HISTOGRAM_SERVER_CQS_CHECKED_BUCKETS = 8,
   GRPC_STATS_HISTOGRAM_BUCKETS = 840
 } grpc_stats_histogram_constants;
-#define GRPC_STATS_INC_CLIENT_CALLS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED)
-#define GRPC_STATS_INC_SERVER_CALLS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SERVER_CALLS_CREATED)
-#define GRPC_STATS_INC_CQS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_CQS_CREATED)
-#define GRPC_STATS_INC_CLIENT_CHANNELS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_CLIENT_CHANNELS_CREATED)
-#define GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_CLIENT_SUBCHANNELS_CREATED)
-#define GRPC_STATS_INC_SERVER_CHANNELS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SERVER_CHANNELS_CREATED)
-#define GRPC_STATS_INC_SYSCALL_POLL(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SYSCALL_POLL)
-#define GRPC_STATS_INC_SYSCALL_WAIT(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SYSCALL_WAIT)
-#define GRPC_STATS_INC_POLLSET_KICK(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICK)
-#define GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                           \
-                         GRPC_STATS_COUNTER_POLLSET_KICKED_WITHOUT_POLLER)
-#define GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICKED_AGAIN)
-#define GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_FD)
-#define GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_CV)
-#define GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_POLLSET_KICK_OWN_THREAD)
-#define GRPC_STATS_INC_HISTOGRAM_SLOW_LOOKUPS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HISTOGRAM_SLOW_LOOKUPS)
-#define GRPC_STATS_INC_SYSCALL_WRITE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SYSCALL_WRITE)
-#define GRPC_STATS_INC_SYSCALL_READ(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SYSCALL_READ)
-#define GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_TCP_BACKUP_POLLERS_CREATED)
-#define GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_TCP_BACKUP_POLLER_POLLS)
-#define GRPC_STATS_INC_HTTP2_OP_BATCHES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_OP_BATCHES)
-#define GRPC_STATS_INC_HTTP2_OP_CANCEL(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_OP_CANCEL)
-#define GRPC_STATS_INC_HTTP2_OP_SEND_INITIAL_METADATA(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                            \
-                         GRPC_STATS_COUNTER_HTTP2_OP_SEND_INITIAL_METADATA)
-#define GRPC_STATS_INC_HTTP2_OP_SEND_MESSAGE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_OP_SEND_MESSAGE)
-#define GRPC_STATS_INC_HTTP2_OP_SEND_TRAILING_METADATA(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                             \
-                         GRPC_STATS_COUNTER_HTTP2_OP_SEND_TRAILING_METADATA)
-#define GRPC_STATS_INC_HTTP2_OP_RECV_INITIAL_METADATA(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                            \
-                         GRPC_STATS_COUNTER_HTTP2_OP_RECV_INITIAL_METADATA)
-#define GRPC_STATS_INC_HTTP2_OP_RECV_MESSAGE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_OP_RECV_MESSAGE)
-#define GRPC_STATS_INC_HTTP2_OP_RECV_TRAILING_METADATA(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                             \
-                         GRPC_STATS_COUNTER_HTTP2_OP_RECV_TRAILING_METADATA)
-#define GRPC_STATS_INC_HTTP2_SETTINGS_WRITES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_SETTINGS_WRITES)
-#define GRPC_STATS_INC_HTTP2_PINGS_SENT(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_PINGS_SENT)
-#define GRPC_STATS_INC_HTTP2_WRITES_BEGUN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_WRITES_BEGUN)
-#define GRPC_STATS_INC_HTTP2_WRITES_OFFLOADED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_WRITES_OFFLOADED)
-#define GRPC_STATS_INC_HTTP2_WRITES_CONTINUED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_WRITES_CONTINUED)
-#define GRPC_STATS_INC_HTTP2_PARTIAL_WRITES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HTTP2_PARTIAL_WRITES)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
+#define GRPC_STATS_INC_CLIENT_CALLS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CLIENT_CALLS_CREATED)
+#define GRPC_STATS_INC_SERVER_CALLS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SERVER_CALLS_CREATED)
+#define GRPC_STATS_INC_CQS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CQS_CREATED)
+#define GRPC_STATS_INC_CLIENT_CHANNELS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CLIENT_CHANNELS_CREATED)
+#define GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CLIENT_SUBCHANNELS_CREATED)
+#define GRPC_STATS_INC_SERVER_CHANNELS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SERVER_CHANNELS_CREATED)
+#define GRPC_STATS_INC_SYSCALL_POLL() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SYSCALL_POLL)
+#define GRPC_STATS_INC_SYSCALL_WAIT() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SYSCALL_WAIT)
+#define GRPC_STATS_INC_POLLSET_KICK() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICK)
+#define GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICKED_WITHOUT_POLLER)
+#define GRPC_STATS_INC_POLLSET_KICKED_AGAIN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICKED_AGAIN)
+#define GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_FD)
+#define GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICK_WAKEUP_CV)
+#define GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_POLLSET_KICK_OWN_THREAD)
+#define GRPC_STATS_INC_HISTOGRAM_SLOW_LOOKUPS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HISTOGRAM_SLOW_LOOKUPS)
+#define GRPC_STATS_INC_SYSCALL_WRITE() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SYSCALL_WRITE)
+#define GRPC_STATS_INC_SYSCALL_READ() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SYSCALL_READ)
+#define GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_TCP_BACKUP_POLLERS_CREATED)
+#define GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_TCP_BACKUP_POLLER_POLLS)
+#define GRPC_STATS_INC_HTTP2_OP_BATCHES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_BATCHES)
+#define GRPC_STATS_INC_HTTP2_OP_CANCEL() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_CANCEL)
+#define GRPC_STATS_INC_HTTP2_OP_SEND_INITIAL_METADATA() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_SEND_INITIAL_METADATA)
+#define GRPC_STATS_INC_HTTP2_OP_SEND_MESSAGE() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_SEND_MESSAGE)
+#define GRPC_STATS_INC_HTTP2_OP_SEND_TRAILING_METADATA() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_SEND_TRAILING_METADATA)
+#define GRPC_STATS_INC_HTTP2_OP_RECV_INITIAL_METADATA() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_RECV_INITIAL_METADATA)
+#define GRPC_STATS_INC_HTTP2_OP_RECV_MESSAGE() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_RECV_MESSAGE)
+#define GRPC_STATS_INC_HTTP2_OP_RECV_TRAILING_METADATA() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_OP_RECV_TRAILING_METADATA)
+#define GRPC_STATS_INC_HTTP2_SETTINGS_WRITES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_SETTINGS_WRITES)
+#define GRPC_STATS_INC_HTTP2_PINGS_SENT() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_PINGS_SENT)
+#define GRPC_STATS_INC_HTTP2_WRITES_BEGUN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_WRITES_BEGUN)
+#define GRPC_STATS_INC_HTTP2_WRITES_OFFLOADED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_WRITES_OFFLOADED)
+#define GRPC_STATS_INC_HTTP2_WRITES_CONTINUED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_WRITES_CONTINUED)
+#define GRPC_STATS_INC_HTTP2_PARTIAL_WRITES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_PARTIAL_WRITES)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE() \
+  GRPC_STATS_INC_COUNTER(                                          \
       GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_INITIAL_WRITE)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                     \
-      (exec_ctx),                                                             \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                 \
-      (exec_ctx), GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA( \
-    exec_ctx)                                                             \
-  GRPC_STATS_INC_COUNTER(                                                 \
-      (exec_ctx),                                                         \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA( \
-    exec_ctx)                                                              \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                    \
-      (exec_ctx),                                                            \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                   \
-      (exec_ctx),                                                           \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                \
-      (exec_ctx), GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                               \
-      (exec_ctx), GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                   \
-      (exec_ctx),                                                           \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL( \
-    exec_ctx)                                                           \
-  GRPC_STATS_INC_COUNTER(                                               \
-      (exec_ctx),                                                       \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL( \
-    exec_ctx)                                                              \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING( \
-    exec_ctx)                                                          \
-  GRPC_STATS_INC_COUNTER(                                              \
-      (exec_ctx),                                                      \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING( \
-    exec_ctx)                                                                         \
-  GRPC_STATS_INC_COUNTER(                                                             \
-      (exec_ctx),                                                                     \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE( \
-    exec_ctx)                                                                        \
-  GRPC_STATS_INC_COUNTER(                                                            \
-      (exec_ctx),                                                                    \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                     \
-      (exec_ctx),                                                             \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                   \
-      (exec_ctx),                                                           \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED( \
-    exec_ctx)                                                                        \
-  GRPC_STATS_INC_COUNTER(                                                            \
-      (exec_ctx),                                                                    \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                  \
-      (exec_ctx),                                                          \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE)
-#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM(exec_ctx) \
-  GRPC_STATS_INC_COUNTER(                                                     \
-      (exec_ctx),                                                             \
-      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM)
-#define GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                         \
-                         GRPC_STATS_COUNTER_HTTP2_SPURIOUS_WRITES_BEGUN)
-#define GRPC_STATS_INC_HPACK_RECV_INDEXED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_RECV_INDEXED)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX_V)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX_V)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX)
-#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX_V)
-#define GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_RECV_UNCOMPRESSED)
-#define GRPC_STATS_INC_HPACK_RECV_HUFFMAN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_RECV_HUFFMAN)
-#define GRPC_STATS_INC_HPACK_RECV_BINARY(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_RECV_BINARY)
-#define GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_RECV_BINARY_BASE64)
-#define GRPC_STATS_INC_HPACK_SEND_INDEXED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_SEND_INDEXED)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX_V)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX_V)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NVRIDX(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX)
-#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NVRIDX_V(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX_V)
-#define GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_SEND_UNCOMPRESSED)
-#define GRPC_STATS_INC_HPACK_SEND_HUFFMAN(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_SEND_HUFFMAN)
-#define GRPC_STATS_INC_HPACK_SEND_BINARY(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_HPACK_SEND_BINARY)
-#define GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_HPACK_SEND_BINARY_BASE64)
-#define GRPC_STATS_INC_COMBINER_LOCKS_INITIATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_COMBINER_LOCKS_INITIATED)
-#define GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                            \
-                         GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_ITEMS)
-#define GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS(exec_ctx) \
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM() \
   GRPC_STATS_INC_COUNTER(                                             \
-      (exec_ctx), GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS)
-#define GRPC_STATS_INC_COMBINER_LOCKS_OFFLOADED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                      \
-                         GRPC_STATS_COUNTER_COMBINER_LOCKS_OFFLOADED)
-#define GRPC_STATS_INC_CALL_COMBINER_LOCKS_INITIATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                           \
-                         GRPC_STATS_COUNTER_CALL_COMBINER_LOCKS_INITIATED)
-#define GRPC_STATS_INC_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS(exec_ctx) \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_START_NEW_STREAM)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE() \
+  GRPC_STATS_INC_COUNTER(                                         \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_MESSAGE)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA() \
+  GRPC_STATS_INC_COUNTER(                                                  \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_INITIAL_METADATA)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA() \
+  GRPC_STATS_INC_COUNTER(                                                   \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_TRAILING_METADATA)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING() \
   GRPC_STATS_INC_COUNTER(                                            \
-      (exec_ctx), GRPC_STATS_COUNTER_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS)
-#define GRPC_STATS_INC_CALL_COMBINER_SET_NOTIFY_ON_CANCEL(exec_ctx) \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RETRY_SEND_PING)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS() \
   GRPC_STATS_INC_COUNTER(                                           \
-      (exec_ctx), GRPC_STATS_COUNTER_CALL_COMBINER_SET_NOTIFY_ON_CANCEL)
-#define GRPC_STATS_INC_CALL_COMBINER_CANCELLED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_CALL_COMBINER_CANCELLED)
-#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_SHORT_ITEMS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                            \
-                         GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_SHORT_ITEMS)
-#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_LONG_ITEMS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                           \
-                         GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_LONG_ITEMS)
-#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                        \
-                         GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_TO_SELF)
-#define GRPC_STATS_INC_EXECUTOR_WAKEUP_INITIATED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                       \
-                         GRPC_STATS_COUNTER_EXECUTOR_WAKEUP_INITIATED)
-#define GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_EXECUTOR_QUEUE_DRAINED)
-#define GRPC_STATS_INC_EXECUTOR_PUSH_RETRIES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_EXECUTOR_PUSH_RETRIES)
-#define GRPC_STATS_INC_SERVER_REQUESTED_CALLS(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_SERVER_REQUESTED_CALLS)
-#define GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                             \
-                         GRPC_STATS_COUNTER_SERVER_SLOWPATH_REQUESTS_QUEUED)
-#define GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_FAILURES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                          \
-                         GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRYLOCK_FAILURES)
-#define GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES(exec_ctx) \
-  GRPC_STATS_INC_COUNTER((exec_ctx),                           \
-                         GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRYLOCK_SUCCESSES)
-#define GRPC_STATS_INC_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES(exec_ctx) \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_CONTINUE_PINGS)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT() \
+  GRPC_STATS_INC_COUNTER(                                        \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_GOAWAY_SENT)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM() \
+  GRPC_STATS_INC_COUNTER(                                       \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_RST_STREAM)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API() \
   GRPC_STATS_INC_COUNTER(                                           \
-      (exec_ctx), GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES)
-#define GRPC_STATS_INC_CALL_INITIAL_SIZE(exec_ctx, value) \
-  grpc_stats_inc_call_initial_size((exec_ctx), (int)(value))
-void grpc_stats_inc_call_initial_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_POLL_EVENTS_RETURNED(exec_ctx, value) \
-  grpc_stats_inc_poll_events_returned((exec_ctx), (int)(value))
-void grpc_stats_inc_poll_events_returned(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_WRITE_SIZE(exec_ctx, value) \
-  grpc_stats_inc_tcp_write_size((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_write_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(exec_ctx, value) \
-  grpc_stats_inc_tcp_write_iov_size((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_write_iov_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_READ_SIZE(exec_ctx, value) \
-  grpc_stats_inc_tcp_read_size((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_read_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_READ_OFFER(exec_ctx, value) \
-  grpc_stats_inc_tcp_read_offer((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_read_offer(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(exec_ctx, value) \
-  grpc_stats_inc_tcp_read_offer_iov_size((exec_ctx), (int)(value))
-void grpc_stats_inc_tcp_read_offer_iov_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_HTTP2_SEND_MESSAGE_SIZE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_message_size((exec_ctx), (int)(value))
-void grpc_stats_inc_http2_send_message_size(grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_HTTP2_SEND_INITIAL_METADATA_PER_WRITE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_initial_metadata_per_write((exec_ctx), (int)(value))
-void grpc_stats_inc_http2_send_initial_metadata_per_write(
-    grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_HTTP2_SEND_MESSAGE_PER_WRITE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_message_per_write((exec_ctx), (int)(value))
-void grpc_stats_inc_http2_send_message_per_write(grpc_exec_ctx* exec_ctx,
-                                                 int x);
-#define GRPC_STATS_INC_HTTP2_SEND_TRAILING_METADATA_PER_WRITE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_trailing_metadata_per_write((exec_ctx),            \
-                                                        (int)(value))
-void grpc_stats_inc_http2_send_trailing_metadata_per_write(
-    grpc_exec_ctx* exec_ctx, int x);
-#define GRPC_STATS_INC_HTTP2_SEND_FLOWCTL_PER_WRITE(exec_ctx, value) \
-  grpc_stats_inc_http2_send_flowctl_per_write((exec_ctx), (int)(value))
-void grpc_stats_inc_http2_send_flowctl_per_write(grpc_exec_ctx* exec_ctx,
-                                                 int x);
-#define GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, value) \
-  grpc_stats_inc_server_cqs_checked((exec_ctx), (int)(value))
-void grpc_stats_inc_server_cqs_checked(grpc_exec_ctx* exec_ctx, int x);
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_CLOSE_FROM_API)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL() \
+  GRPC_STATS_INC_COUNTER(                                                \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_STREAM_FLOW_CONTROL)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL() \
+  GRPC_STATS_INC_COUNTER(                                                   \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS() \
+  GRPC_STATS_INC_COUNTER(                                          \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_SEND_SETTINGS)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING() \
+  GRPC_STATS_INC_COUNTER(                                               \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_BDP_ESTIMATOR_PING)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING() \
+  GRPC_STATS_INC_COUNTER(                                                              \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_SETTING)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE() \
+  GRPC_STATS_INC_COUNTER(                                                             \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FLOW_CONTROL_UNSTALLED_BY_UPDATE)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING() \
+  GRPC_STATS_INC_COUNTER(                                             \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_APPLICATION_PING)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING() \
+  GRPC_STATS_INC_COUNTER(                                           \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_KEEPALIVE_PING)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED() \
+  GRPC_STATS_INC_COUNTER(                                                             \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_TRANSPORT_FLOW_CONTROL_UNSTALLED)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE() \
+  GRPC_STATS_INC_COUNTER(                                          \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_PING_RESPONSE)
+#define GRPC_STATS_INC_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM() \
+  GRPC_STATS_INC_COUNTER(                                             \
+      GRPC_STATS_COUNTER_HTTP2_INITIATE_WRITE_DUE_TO_FORCE_RST_STREAM)
+#define GRPC_STATS_INC_HTTP2_SPURIOUS_WRITES_BEGUN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HTTP2_SPURIOUS_WRITES_BEGUN)
+#define GRPC_STATS_INC_HPACK_RECV_INDEXED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_INDEXED)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_INCIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_INCIDX_V)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NOTIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NOTIDX_V)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX)
+#define GRPC_STATS_INC_HPACK_RECV_LITHDR_NVRIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_LITHDR_NVRIDX_V)
+#define GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_UNCOMPRESSED)
+#define GRPC_STATS_INC_HPACK_RECV_HUFFMAN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_HUFFMAN)
+#define GRPC_STATS_INC_HPACK_RECV_BINARY() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_BINARY)
+#define GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_RECV_BINARY_BASE64)
+#define GRPC_STATS_INC_HPACK_SEND_INDEXED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_INDEXED)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_INCIDX_V)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NOTIDX_V)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NVRIDX() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX)
+#define GRPC_STATS_INC_HPACK_SEND_LITHDR_NVRIDX_V() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_LITHDR_NVRIDX_V)
+#define GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_UNCOMPRESSED)
+#define GRPC_STATS_INC_HPACK_SEND_HUFFMAN() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_HUFFMAN)
+#define GRPC_STATS_INC_HPACK_SEND_BINARY() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_BINARY)
+#define GRPC_STATS_INC_HPACK_SEND_BINARY_BASE64() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_HPACK_SEND_BINARY_BASE64)
+#define GRPC_STATS_INC_COMBINER_LOCKS_INITIATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_COMBINER_LOCKS_INITIATED)
+#define GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_ITEMS)
+#define GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS() \
+  GRPC_STATS_INC_COUNTER(                                     \
+      GRPC_STATS_COUNTER_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS)
+#define GRPC_STATS_INC_COMBINER_LOCKS_OFFLOADED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_COMBINER_LOCKS_OFFLOADED)
+#define GRPC_STATS_INC_CALL_COMBINER_LOCKS_INITIATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CALL_COMBINER_LOCKS_INITIATED)
+#define GRPC_STATS_INC_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS)
+#define GRPC_STATS_INC_CALL_COMBINER_SET_NOTIFY_ON_CANCEL() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CALL_COMBINER_SET_NOTIFY_ON_CANCEL)
+#define GRPC_STATS_INC_CALL_COMBINER_CANCELLED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CALL_COMBINER_CANCELLED)
+#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_SHORT_ITEMS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_SHORT_ITEMS)
+#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_LONG_ITEMS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_LONG_ITEMS)
+#define GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_SCHEDULED_TO_SELF)
+#define GRPC_STATS_INC_EXECUTOR_WAKEUP_INITIATED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_WAKEUP_INITIATED)
+#define GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_QUEUE_DRAINED)
+#define GRPC_STATS_INC_EXECUTOR_PUSH_RETRIES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_EXECUTOR_PUSH_RETRIES)
+#define GRPC_STATS_INC_SERVER_REQUESTED_CALLS() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SERVER_REQUESTED_CALLS)
+#define GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_SERVER_SLOWPATH_REQUESTS_QUEUED)
+#define GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_FAILURES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRYLOCK_FAILURES)
+#define GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRYLOCK_SUCCESSES)
+#define GRPC_STATS_INC_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES() \
+  GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES)
+#define GRPC_STATS_INC_CALL_INITIAL_SIZE(value) \
+  grpc_stats_inc_call_initial_size((int)(value))
+void grpc_stats_inc_call_initial_size(int x);
+#define GRPC_STATS_INC_POLL_EVENTS_RETURNED(value) \
+  grpc_stats_inc_poll_events_returned((int)(value))
+void grpc_stats_inc_poll_events_returned(int x);
+#define GRPC_STATS_INC_TCP_WRITE_SIZE(value) \
+  grpc_stats_inc_tcp_write_size((int)(value))
+void grpc_stats_inc_tcp_write_size(int x);
+#define GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(value) \
+  grpc_stats_inc_tcp_write_iov_size((int)(value))
+void grpc_stats_inc_tcp_write_iov_size(int x);
+#define GRPC_STATS_INC_TCP_READ_SIZE(value) \
+  grpc_stats_inc_tcp_read_size((int)(value))
+void grpc_stats_inc_tcp_read_size(int x);
+#define GRPC_STATS_INC_TCP_READ_OFFER(value) \
+  grpc_stats_inc_tcp_read_offer((int)(value))
+void grpc_stats_inc_tcp_read_offer(int x);
+#define GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(value) \
+  grpc_stats_inc_tcp_read_offer_iov_size((int)(value))
+void grpc_stats_inc_tcp_read_offer_iov_size(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_MESSAGE_SIZE(value) \
+  grpc_stats_inc_http2_send_message_size((int)(value))
+void grpc_stats_inc_http2_send_message_size(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_INITIAL_METADATA_PER_WRITE(value) \
+  grpc_stats_inc_http2_send_initial_metadata_per_write((int)(value))
+void grpc_stats_inc_http2_send_initial_metadata_per_write(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_MESSAGE_PER_WRITE(value) \
+  grpc_stats_inc_http2_send_message_per_write((int)(value))
+void grpc_stats_inc_http2_send_message_per_write(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_TRAILING_METADATA_PER_WRITE(value) \
+  grpc_stats_inc_http2_send_trailing_metadata_per_write((int)(value))
+void grpc_stats_inc_http2_send_trailing_metadata_per_write(int x);
+#define GRPC_STATS_INC_HTTP2_SEND_FLOWCTL_PER_WRITE(value) \
+  grpc_stats_inc_http2_send_flowctl_per_write((int)(value))
+void grpc_stats_inc_http2_send_flowctl_per_write(int x);
+#define GRPC_STATS_INC_SERVER_CQS_CHECKED(value) \
+  grpc_stats_inc_server_cqs_checked((int)(value))
+void grpc_stats_inc_server_cqs_checked(int x);
 extern const int grpc_stats_histo_buckets[13];
 extern const int grpc_stats_histo_start[13];
 extern const int* const grpc_stats_histo_bucket_boundaries[13];
-extern void (*const grpc_stats_inc_histogram[13])(grpc_exec_ctx* exec_ctx,
-                                                  int x);
+extern void (*const grpc_stats_inc_histogram[13])(int x);
 
 #endif /* GRPC_CORE_LIB_DEBUG_STATS_DATA_H */
diff --git a/src/core/lib/http/httpcli.cc b/src/core/lib/http/httpcli.cc
index 73b484b..ed874c4 100644
--- a/src/core/lib/http/httpcli.cc
+++ b/src/core/lib/http/httpcli.cc
@@ -63,13 +63,11 @@
 static grpc_httpcli_get_override g_get_override = nullptr;
 static grpc_httpcli_post_override g_post_override = nullptr;
 
-static void plaintext_handshake(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_endpoint* endpoint, const char* host,
-                                grpc_millis deadline,
-                                void (*on_done)(grpc_exec_ctx* exec_ctx,
-                                                void* arg,
+static void plaintext_handshake(void* arg, grpc_endpoint* endpoint,
+                                const char* host, grpc_millis deadline,
+                                void (*on_done)(void* arg,
                                                 grpc_endpoint* endpoint)) {
-  on_done(exec_ctx, arg, endpoint);
+  on_done(arg, endpoint);
 }
 
 const grpc_httpcli_handshaker grpc_httpcli_plaintext = {"http",
@@ -79,34 +77,31 @@
   context->pollset_set = grpc_pollset_set_create();
 }
 
-void grpc_httpcli_context_destroy(grpc_exec_ctx* exec_ctx,
-                                  grpc_httpcli_context* context) {
-  grpc_pollset_set_destroy(exec_ctx, context->pollset_set);
+void grpc_httpcli_context_destroy(grpc_httpcli_context* context) {
+  grpc_pollset_set_destroy(context->pollset_set);
 }
 
-static void next_address(grpc_exec_ctx* exec_ctx, internal_request* req,
-                         grpc_error* due_to_error);
+static void next_address(internal_request* req, grpc_error* due_to_error);
 
-static void finish(grpc_exec_ctx* exec_ctx, internal_request* req,
-                   grpc_error* error) {
-  grpc_polling_entity_del_from_pollset_set(exec_ctx, req->pollent,
+static void finish(internal_request* req, grpc_error* error) {
+  grpc_polling_entity_del_from_pollset_set(req->pollent,
                                            req->context->pollset_set);
-  GRPC_CLOSURE_SCHED(exec_ctx, req->on_done, error);
+  GRPC_CLOSURE_SCHED(req->on_done, error);
   grpc_http_parser_destroy(&req->parser);
   if (req->addresses != nullptr) {
     grpc_resolved_addresses_destroy(req->addresses);
   }
   if (req->ep != nullptr) {
-    grpc_endpoint_destroy(exec_ctx, req->ep);
+    grpc_endpoint_destroy(req->ep);
   }
-  grpc_slice_unref_internal(exec_ctx, req->request_text);
+  grpc_slice_unref_internal(req->request_text);
   gpr_free(req->host);
   gpr_free(req->ssl_host_override);
   grpc_iomgr_unregister_object(&req->iomgr_obj);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &req->incoming);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &req->outgoing);
+  grpc_slice_buffer_destroy_internal(&req->incoming);
+  grpc_slice_buffer_destroy_internal(&req->outgoing);
   GRPC_ERROR_UNREF(req->overall_error);
-  grpc_resource_quota_unref_internal(exec_ctx, req->resource_quota);
+  grpc_resource_quota_unref_internal(req->resource_quota);
   gpr_free(req);
 }
 
@@ -124,12 +119,11 @@
   gpr_free(addr_text);
 }
 
-static void do_read(grpc_exec_ctx* exec_ctx, internal_request* req) {
-  grpc_endpoint_read(exec_ctx, req->ep, &req->incoming, &req->on_read);
+static void do_read(internal_request* req) {
+  grpc_endpoint_read(req->ep, &req->incoming, &req->on_read);
 }
 
-static void on_read(grpc_exec_ctx* exec_ctx, void* user_data,
-                    grpc_error* error) {
+static void on_read(void* user_data, grpc_error* error) {
   internal_request* req = (internal_request*)user_data;
   size_t i;
 
@@ -139,77 +133,70 @@
       grpc_error* err = grpc_http_parser_parse(
           &req->parser, req->incoming.slices[i], nullptr);
       if (err != GRPC_ERROR_NONE) {
-        finish(exec_ctx, req, err);
+        finish(req, err);
         return;
       }
     }
   }
 
   if (error == GRPC_ERROR_NONE) {
-    do_read(exec_ctx, req);
+    do_read(req);
   } else if (!req->have_read_byte) {
-    next_address(exec_ctx, req, GRPC_ERROR_REF(error));
+    next_address(req, GRPC_ERROR_REF(error));
   } else {
-    finish(exec_ctx, req, grpc_http_parser_eof(&req->parser));
+    finish(req, grpc_http_parser_eof(&req->parser));
   }
 }
 
-static void on_written(grpc_exec_ctx* exec_ctx, internal_request* req) {
-  do_read(exec_ctx, req);
-}
+static void on_written(internal_request* req) { do_read(req); }
 
-static void done_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void done_write(void* arg, grpc_error* error) {
   internal_request* req = (internal_request*)arg;
   if (error == GRPC_ERROR_NONE) {
-    on_written(exec_ctx, req);
+    on_written(req);
   } else {
-    next_address(exec_ctx, req, GRPC_ERROR_REF(error));
+    next_address(req, GRPC_ERROR_REF(error));
   }
 }
 
-static void start_write(grpc_exec_ctx* exec_ctx, internal_request* req) {
+static void start_write(internal_request* req) {
   grpc_slice_ref_internal(req->request_text);
   grpc_slice_buffer_add(&req->outgoing, req->request_text);
-  grpc_endpoint_write(exec_ctx, req->ep, &req->outgoing, &req->done_write);
+  grpc_endpoint_write(req->ep, &req->outgoing, &req->done_write);
 }
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_endpoint* ep) {
+static void on_handshake_done(void* arg, grpc_endpoint* ep) {
   internal_request* req = (internal_request*)arg;
 
   if (!ep) {
-    next_address(
-        exec_ctx, req,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Unexplained handshake failure"));
+    next_address(req, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                          "Unexplained handshake failure"));
     return;
   }
 
   req->ep = ep;
-  start_write(exec_ctx, req);
+  start_write(req);
 }
 
-static void on_connected(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void on_connected(void* arg, grpc_error* error) {
   internal_request* req = (internal_request*)arg;
 
   if (!req->ep) {
-    next_address(exec_ctx, req, GRPC_ERROR_REF(error));
+    next_address(req, GRPC_ERROR_REF(error));
     return;
   }
   req->handshaker->handshake(
-      exec_ctx, req, req->ep,
-      req->ssl_host_override ? req->ssl_host_override : req->host,
+      req, req->ep, req->ssl_host_override ? req->ssl_host_override : req->host,
       req->deadline, on_handshake_done);
 }
 
-static void next_address(grpc_exec_ctx* exec_ctx, internal_request* req,
-                         grpc_error* error) {
+static void next_address(internal_request* req, grpc_error* error) {
   grpc_resolved_address* addr;
   if (error != GRPC_ERROR_NONE) {
     append_error(req, error);
   }
   if (req->next_address == req->addresses->naddrs) {
-    finish(exec_ctx, req,
+    finish(req,
            GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                "Failed HTTP requests to all targets", &req->overall_error, 1));
     return;
@@ -221,23 +208,21 @@
       (char*)GRPC_ARG_RESOURCE_QUOTA, req->resource_quota,
       grpc_resource_quota_arg_vtable());
   grpc_channel_args args = {1, &arg};
-  grpc_tcp_client_connect(exec_ctx, &req->connected, &req->ep,
-                          req->context->pollset_set, &args, addr,
-                          req->deadline);
+  grpc_tcp_client_connect(&req->connected, &req->ep, req->context->pollset_set,
+                          &args, addr, req->deadline);
 }
 
-static void on_resolved(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_resolved(void* arg, grpc_error* error) {
   internal_request* req = (internal_request*)arg;
   if (error != GRPC_ERROR_NONE) {
-    finish(exec_ctx, req, GRPC_ERROR_REF(error));
+    finish(req, GRPC_ERROR_REF(error));
     return;
   }
   req->next_address = 0;
-  next_address(exec_ctx, req, GRPC_ERROR_NONE);
+  next_address(req, GRPC_ERROR_NONE);
 }
 
-static void internal_request_begin(grpc_exec_ctx* exec_ctx,
-                                   grpc_httpcli_context* context,
+static void internal_request_begin(grpc_httpcli_context* context,
                                    grpc_polling_entity* pollent,
                                    grpc_resource_quota* resource_quota,
                                    const grpc_httpcli_request* request,
@@ -267,33 +252,31 @@
   req->ssl_host_override = gpr_strdup(request->ssl_host_override);
 
   GPR_ASSERT(pollent);
-  grpc_polling_entity_add_to_pollset_set(exec_ctx, req->pollent,
+  grpc_polling_entity_add_to_pollset_set(req->pollent,
                                          req->context->pollset_set);
   grpc_resolve_address(
-      exec_ctx, request->host, req->handshaker->default_port,
-      req->context->pollset_set,
+      request->host, req->handshaker->default_port, req->context->pollset_set,
       GRPC_CLOSURE_CREATE(on_resolved, req, grpc_schedule_on_exec_ctx),
       &req->addresses);
 }
 
-void grpc_httpcli_get(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
+void grpc_httpcli_get(grpc_httpcli_context* context,
                       grpc_polling_entity* pollent,
                       grpc_resource_quota* resource_quota,
                       const grpc_httpcli_request* request, grpc_millis deadline,
                       grpc_closure* on_done, grpc_httpcli_response* response) {
   char* name;
-  if (g_get_override &&
-      g_get_override(exec_ctx, request, deadline, on_done, response)) {
+  if (g_get_override && g_get_override(request, deadline, on_done, response)) {
     return;
   }
   gpr_asprintf(&name, "HTTP:GET:%s:%s", request->host, request->http.path);
-  internal_request_begin(exec_ctx, context, pollent, resource_quota, request,
-                         deadline, on_done, response, name,
+  internal_request_begin(context, pollent, resource_quota, request, deadline,
+                         on_done, response, name,
                          grpc_httpcli_format_get_request(request));
   gpr_free(name);
 }
 
-void grpc_httpcli_post(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
+void grpc_httpcli_post(grpc_httpcli_context* context,
                        grpc_polling_entity* pollent,
                        grpc_resource_quota* resource_quota,
                        const grpc_httpcli_request* request,
@@ -301,16 +284,14 @@
                        grpc_millis deadline, grpc_closure* on_done,
                        grpc_httpcli_response* response) {
   char* name;
-  if (g_post_override &&
-      g_post_override(exec_ctx, request, body_bytes, body_size, deadline,
-                      on_done, response)) {
+  if (g_post_override && g_post_override(request, body_bytes, body_size,
+                                         deadline, on_done, response)) {
     return;
   }
   gpr_asprintf(&name, "HTTP:POST:%s:%s", request->host, request->http.path);
   internal_request_begin(
-      exec_ctx, context, pollent, resource_quota, request, deadline, on_done,
-      response, name,
-      grpc_httpcli_format_post_request(request, body_bytes, body_size));
+      context, pollent, resource_quota, request, deadline, on_done, response,
+      name, grpc_httpcli_format_post_request(request, body_bytes, body_size));
   gpr_free(name);
 }
 
diff --git a/src/core/lib/http/httpcli.h b/src/core/lib/http/httpcli.h
index 6f67556..72d20cc 100644
--- a/src/core/lib/http/httpcli.h
+++ b/src/core/lib/http/httpcli.h
@@ -41,10 +41,9 @@
 
 typedef struct {
   const char* default_port;
-  void (*handshake)(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* endpoint,
-                    const char* host, grpc_millis deadline,
-                    void (*on_done)(grpc_exec_ctx* exec_ctx, void* arg,
-                                    grpc_endpoint* endpoint));
+  void (*handshake)(void* arg, grpc_endpoint* endpoint, const char* host,
+                    grpc_millis deadline,
+                    void (*on_done)(void* arg, grpc_endpoint* endpoint));
 } grpc_httpcli_handshaker;
 
 extern const grpc_httpcli_handshaker grpc_httpcli_plaintext;
@@ -68,8 +67,7 @@
 typedef struct grpc_http_response grpc_httpcli_response;
 
 void grpc_httpcli_context_init(grpc_httpcli_context* context);
-void grpc_httpcli_context_destroy(grpc_exec_ctx* exec_ctx,
-                                  grpc_httpcli_context* context);
+void grpc_httpcli_context_destroy(grpc_httpcli_context* context);
 
 /* Asynchronously perform a HTTP GET.
    'context' specifies the http context under which to do the get
@@ -80,7 +78,7 @@
      destroyed once the call returns
    'deadline' contains a deadline for the request (or gpr_inf_future)
    'on_response' is a callback to report results to */
-void grpc_httpcli_get(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
+void grpc_httpcli_get(grpc_httpcli_context* context,
                       grpc_polling_entity* pollent,
                       grpc_resource_quota* resource_quota,
                       const grpc_httpcli_request* request, grpc_millis deadline,
@@ -101,7 +99,7 @@
      lifetime of the request
    'on_response' is a callback to report results to
    Does not support ?var1=val1&var2=val2 in the path. */
-void grpc_httpcli_post(grpc_exec_ctx* exec_ctx, grpc_httpcli_context* context,
+void grpc_httpcli_post(grpc_httpcli_context* context,
                        grpc_polling_entity* pollent,
                        grpc_resource_quota* resource_quota,
                        const grpc_httpcli_request* request,
@@ -110,15 +108,16 @@
                        grpc_httpcli_response* response);
 
 /* override functions return 1 if they handled the request, 0 otherwise */
-typedef int (*grpc_httpcli_get_override)(grpc_exec_ctx* exec_ctx,
-                                         const grpc_httpcli_request* request,
+typedef int (*grpc_httpcli_get_override)(const grpc_httpcli_request* request,
                                          grpc_millis deadline,
                                          grpc_closure* on_complete,
                                          grpc_httpcli_response* response);
-typedef int (*grpc_httpcli_post_override)(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body_bytes, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_complete, grpc_httpcli_response* response);
+typedef int (*grpc_httpcli_post_override)(const grpc_httpcli_request* request,
+                                          const char* body_bytes,
+                                          size_t body_size,
+                                          grpc_millis deadline,
+                                          grpc_closure* on_complete,
+                                          grpc_httpcli_response* response);
 
 void grpc_httpcli_set_override(grpc_httpcli_get_override get,
                                grpc_httpcli_post_override post);
diff --git a/src/core/lib/http/httpcli_security_connector.cc b/src/core/lib/http/httpcli_security_connector.cc
index d25fba5..bfb536a 100644
--- a/src/core/lib/http/httpcli_security_connector.cc
+++ b/src/core/lib/http/httpcli_security_connector.cc
@@ -38,8 +38,7 @@
   char* secure_peer_name;
 } grpc_httpcli_ssl_channel_security_connector;
 
-static void httpcli_ssl_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_security_connector* sc) {
+static void httpcli_ssl_destroy(grpc_security_connector* sc) {
   grpc_httpcli_ssl_channel_security_connector* c =
       (grpc_httpcli_ssl_channel_security_connector*)sc;
   if (c->handshaker_factory != nullptr) {
@@ -50,8 +49,7 @@
   gpr_free(sc);
 }
 
-static void httpcli_ssl_add_handshakers(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_security_connector* sc,
+static void httpcli_ssl_add_handshakers(grpc_channel_security_connector* sc,
                                         grpc_handshake_manager* handshake_mgr) {
   grpc_httpcli_ssl_channel_security_connector* c =
       (grpc_httpcli_ssl_channel_security_connector*)sc;
@@ -65,13 +63,11 @@
     }
   }
   grpc_handshake_manager_add(
-      handshake_mgr,
-      grpc_security_handshaker_create(
-          exec_ctx, tsi_create_adapter_handshaker(handshaker), &sc->base));
+      handshake_mgr, grpc_security_handshaker_create(
+                         tsi_create_adapter_handshaker(handshaker), &sc->base));
 }
 
-static void httpcli_ssl_check_peer(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc, tsi_peer peer,
+static void httpcli_ssl_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                    grpc_auth_context** auth_context,
                                    grpc_closure* on_peer_checked) {
   grpc_httpcli_ssl_channel_security_connector* c =
@@ -87,7 +83,7 @@
     error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
     gpr_free(msg);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked, error);
+  GRPC_CLOSURE_SCHED(on_peer_checked, error);
   tsi_peer_destruct(&peer);
 }
 
@@ -104,8 +100,8 @@
     httpcli_ssl_destroy, httpcli_ssl_check_peer, httpcli_ssl_cmp};
 
 static grpc_security_status httpcli_ssl_channel_security_connector_create(
-    grpc_exec_ctx* exec_ctx, const char* pem_root_certs,
-    const char* secure_peer_name, grpc_channel_security_connector** sc) {
+    const char* pem_root_certs, const char* secure_peer_name,
+    grpc_channel_security_connector** sc) {
   tsi_result result = TSI_OK;
   grpc_httpcli_ssl_channel_security_connector* c;
 
@@ -128,12 +124,12 @@
   if (result != TSI_OK) {
     gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
             tsi_result_to_string(result));
-    httpcli_ssl_destroy(exec_ctx, &c->base.base);
+    httpcli_ssl_destroy(&c->base.base);
     *sc = nullptr;
     return GRPC_SECURITY_ERROR;
   }
   // We don't actually need a channel credentials object in this case,
-  // but we set it to a non-NULL address so that we don't trigger
+  // but we set it to a non-nullptr address so that we don't trigger
   // assertions in grpc_channel_security_connector_cmp().
   c->base.channel_creds = (grpc_channel_credentials*)1;
   c->base.add_handshakers = httpcli_ssl_add_handshakers;
@@ -144,40 +140,37 @@
 /* handshaker */
 
 typedef struct {
-  void (*func)(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* endpoint);
+  void (*func)(void* arg, grpc_endpoint* endpoint);
   void* arg;
   grpc_handshake_manager* handshake_mgr;
 } on_done_closure;
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
   on_done_closure* c = (on_done_closure*)args->user_data;
   if (error != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(error);
     gpr_log(GPR_ERROR, "Secure transport setup failed: %s", msg);
 
-    c->func(exec_ctx, c->arg, nullptr);
+    c->func(c->arg, nullptr);
   } else {
-    grpc_channel_args_destroy(exec_ctx, args->args);
-    grpc_slice_buffer_destroy_internal(exec_ctx, args->read_buffer);
+    grpc_channel_args_destroy(args->args);
+    grpc_slice_buffer_destroy_internal(args->read_buffer);
     gpr_free(args->read_buffer);
-    c->func(exec_ctx, c->arg, args->endpoint);
+    c->func(c->arg, args->endpoint);
   }
-  grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
+  grpc_handshake_manager_destroy(c->handshake_mgr);
   gpr_free(c);
 }
 
-static void ssl_handshake(grpc_exec_ctx* exec_ctx, void* arg,
-                          grpc_endpoint* tcp, const char* host,
+static void ssl_handshake(void* arg, grpc_endpoint* tcp, const char* host,
                           grpc_millis deadline,
-                          void (*on_done)(grpc_exec_ctx* exec_ctx, void* arg,
-                                          grpc_endpoint* endpoint)) {
+                          void (*on_done)(void* arg, grpc_endpoint* endpoint)) {
   on_done_closure* c = (on_done_closure*)gpr_malloc(sizeof(*c));
   const char* pem_root_certs = grpc_get_default_ssl_roots();
   if (pem_root_certs == nullptr) {
     gpr_log(GPR_ERROR, "Could not get default pem root certs.");
-    on_done(exec_ctx, arg, nullptr);
+    on_done(arg, nullptr);
     gpr_free(c);
     return;
   }
@@ -185,15 +178,16 @@
   c->arg = arg;
   grpc_channel_security_connector* sc = nullptr;
   GPR_ASSERT(httpcli_ssl_channel_security_connector_create(
-                 exec_ctx, pem_root_certs, host, &sc) == GRPC_SECURITY_OK);
+                 pem_root_certs, host, &sc) == GRPC_SECURITY_OK);
   grpc_arg channel_arg = grpc_security_connector_to_arg(&sc->base);
   grpc_channel_args args = {1, &channel_arg};
   c->handshake_mgr = grpc_handshake_manager_create();
-  grpc_handshakers_add(exec_ctx, HANDSHAKER_CLIENT, &args, c->handshake_mgr);
+  grpc_handshakers_add(HANDSHAKER_CLIENT, &args, c->handshake_mgr);
   grpc_handshake_manager_do_handshake(
-      exec_ctx, c->handshake_mgr, tcp, nullptr /* channel_args */, deadline,
-      nullptr /* acceptor */, on_handshake_done, c /* user_data */);
-  GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, &sc->base, "httpcli");
+      c->handshake_mgr, nullptr /* interested_parties */, tcp,
+      nullptr /* channel_args */, deadline, nullptr /* acceptor */,
+      on_handshake_done, c /* user_data */);
+  GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "httpcli");
 }
 
 const grpc_httpcli_handshaker grpc_httpcli_ssl = {"https", ssl_handshake};
diff --git a/src/core/lib/iomgr/block_annotate.h b/src/core/lib/iomgr/block_annotate.h
index 340ebcb..a57873a 100644
--- a/src/core/lib/iomgr/block_annotate.h
+++ b/src/core/lib/iomgr/block_annotate.h
@@ -31,26 +31,27 @@
   do {                                        \
     gpr_thd_start_blocking_region();          \
   } while (0)
+#define GRPC_SCHEDULING_END_BLOCKING_REGION     \
+  do {                                          \
+    gpr_thd_end_blocking_region();              \
+    grpc_core::ExecCtx::Get()->InvalidateNow(); \
+  } while (0)
 #define GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX \
   do {                                                  \
     gpr_thd_end_blocking_region();                      \
   } while (0)
-#define GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(ec) \
-  do {                                                        \
-    gpr_thd_end_blocking_region();                            \
-    grpc_exec_ctx_invalidate_now((ec));                       \
-  } while (0)
+
 #else
 #define GRPC_SCHEDULING_START_BLOCKING_REGION \
   do {                                        \
   } while (0)
+#define GRPC_SCHEDULING_END_BLOCKING_REGION     \
+  do {                                          \
+    grpc_core::ExecCtx::Get()->InvalidateNow(); \
+  } while (0)
 #define GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX \
   do {                                                  \
   } while (0)
-#define GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(ec) \
-  do {                                                        \
-    grpc_exec_ctx_invalidate_now((ec));                       \
-  } while (0)
 #endif
 
 #endif /* GRPC_CORE_LIB_IOMGR_BLOCK_ANNOTATE_H */
diff --git a/src/core/lib/iomgr/call_combiner.cc b/src/core/lib/iomgr/call_combiner.cc
index b5910b4..a9f48fb 100644
--- a/src/core/lib/iomgr/call_combiner.cc
+++ b/src/core/lib/iomgr/call_combiner.cc
@@ -56,8 +56,7 @@
 #define DEBUG_FMT_ARGS
 #endif
 
-void grpc_call_combiner_start(grpc_exec_ctx* exec_ctx,
-                              grpc_call_combiner* call_combiner,
+void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
                               grpc_closure* closure,
                               grpc_error* error DEBUG_ARGS,
                               const char* reason) {
@@ -75,15 +74,16 @@
     gpr_log(GPR_DEBUG, "  size: %" PRIdPTR " -> %" PRIdPTR, prev_size,
             prev_size + 1);
   }
-  GRPC_STATS_INC_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS(exec_ctx);
+  GRPC_STATS_INC_CALL_COMBINER_LOCKS_SCHEDULED_ITEMS();
   if (prev_size == 0) {
-    GRPC_STATS_INC_CALL_COMBINER_LOCKS_INITIATED(exec_ctx);
+    GRPC_STATS_INC_CALL_COMBINER_LOCKS_INITIATED();
+
     GPR_TIMER_MARK("call_combiner_initiate", 0);
     if (grpc_call_combiner_trace.enabled()) {
       gpr_log(GPR_DEBUG, "  EXECUTING IMMEDIATELY");
     }
     // Queue was empty, so execute this closure immediately.
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, error);
+    GRPC_CLOSURE_SCHED(closure, error);
   } else {
     if (grpc_call_combiner_trace.enabled()) {
       gpr_log(GPR_INFO, "  QUEUING");
@@ -95,8 +95,7 @@
   GPR_TIMER_END("call_combiner_start", 0);
 }
 
-void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
-                             grpc_call_combiner* call_combiner DEBUG_ARGS,
+void grpc_call_combiner_stop(grpc_call_combiner* call_combiner DEBUG_ARGS,
                              const char* reason) {
   GPR_TIMER_BEGIN("call_combiner_stop", 0);
   if (grpc_call_combiner_trace.enabled()) {
@@ -131,7 +130,7 @@
         gpr_log(GPR_DEBUG, "  EXECUTING FROM QUEUE: closure=%p error=%s",
                 closure, grpc_error_string(closure->error_data.error));
       }
-      GRPC_CLOSURE_SCHED(exec_ctx, closure, closure->error_data.error);
+      GRPC_CLOSURE_SCHED(closure, closure->error_data.error);
       break;
     }
   } else if (grpc_call_combiner_trace.enabled()) {
@@ -140,10 +139,9 @@
   GPR_TIMER_END("call_combiner_stop", 0);
 }
 
-void grpc_call_combiner_set_notify_on_cancel(grpc_exec_ctx* exec_ctx,
-                                             grpc_call_combiner* call_combiner,
+void grpc_call_combiner_set_notify_on_cancel(grpc_call_combiner* call_combiner,
                                              grpc_closure* closure) {
-  GRPC_STATS_INC_CALL_COMBINER_SET_NOTIFY_ON_CANCEL(exec_ctx);
+  GRPC_STATS_INC_CALL_COMBINER_SET_NOTIFY_ON_CANCEL();
   while (true) {
     // Decode original state.
     gpr_atm original_state = gpr_atm_acq_load(&call_combiner->cancel_state);
@@ -157,7 +155,7 @@
                 "for pre-existing cancellation",
                 call_combiner, closure);
       }
-      GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_REF(original_error));
+      GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_REF(original_error));
       break;
     } else {
       if (gpr_atm_full_cas(&call_combiner->cancel_state, original_state,
@@ -176,7 +174,7 @@
                     "call_combiner=%p: scheduling old cancel callback=%p",
                     call_combiner, closure);
           }
-          GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+          GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
         }
         break;
       }
@@ -185,10 +183,9 @@
   }
 }
 
-void grpc_call_combiner_cancel(grpc_exec_ctx* exec_ctx,
-                               grpc_call_combiner* call_combiner,
+void grpc_call_combiner_cancel(grpc_call_combiner* call_combiner,
                                grpc_error* error) {
-  GRPC_STATS_INC_CALL_COMBINER_CANCELLED(exec_ctx);
+  GRPC_STATS_INC_CALL_COMBINER_CANCELLED();
   while (true) {
     gpr_atm original_state = gpr_atm_acq_load(&call_combiner->cancel_state);
     grpc_error* original_error = decode_cancel_state_error(original_state);
@@ -205,7 +202,7 @@
                   "call_combiner=%p: scheduling notify_on_cancel callback=%p",
                   call_combiner, notify_on_cancel);
         }
-        GRPC_CLOSURE_SCHED(exec_ctx, notify_on_cancel, GRPC_ERROR_REF(error));
+        GRPC_CLOSURE_SCHED(notify_on_cancel, GRPC_ERROR_REF(error));
       }
       break;
     }
diff --git a/src/core/lib/iomgr/call_combiner.h b/src/core/lib/iomgr/call_combiner.h
index c07af51..9f7e6ce 100644
--- a/src/core/lib/iomgr/call_combiner.h
+++ b/src/core/lib/iomgr/call_combiner.h
@@ -53,37 +53,29 @@
 void grpc_call_combiner_destroy(grpc_call_combiner* call_combiner);
 
 #ifndef NDEBUG
-#define GRPC_CALL_COMBINER_START(exec_ctx, call_combiner, closure, error,   \
-                                 reason)                                    \
-  grpc_call_combiner_start((exec_ctx), (call_combiner), (closure), (error), \
-                           __FILE__, __LINE__, (reason))
-#define GRPC_CALL_COMBINER_STOP(exec_ctx, call_combiner, reason)           \
-  grpc_call_combiner_stop((exec_ctx), (call_combiner), __FILE__, __LINE__, \
-                          (reason))
+#define GRPC_CALL_COMBINER_START(call_combiner, closure, error, reason)   \
+  grpc_call_combiner_start((call_combiner), (closure), (error), __FILE__, \
+                           __LINE__, (reason))
+#define GRPC_CALL_COMBINER_STOP(call_combiner, reason) \
+  grpc_call_combiner_stop((call_combiner), __FILE__, __LINE__, (reason))
 /// Starts processing \a closure on \a call_combiner.
-void grpc_call_combiner_start(grpc_exec_ctx* exec_ctx,
-                              grpc_call_combiner* call_combiner,
+void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
                               grpc_closure* closure, grpc_error* error,
                               const char* file, int line, const char* reason);
 /// Yields the call combiner to the next closure in the queue, if any.
-void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
-                             grpc_call_combiner* call_combiner,
+void grpc_call_combiner_stop(grpc_call_combiner* call_combiner,
                              const char* file, int line, const char* reason);
 #else
-#define GRPC_CALL_COMBINER_START(exec_ctx, call_combiner, closure, error,   \
-                                 reason)                                    \
-  grpc_call_combiner_start((exec_ctx), (call_combiner), (closure), (error), \
-                           (reason))
-#define GRPC_CALL_COMBINER_STOP(exec_ctx, call_combiner, reason) \
-  grpc_call_combiner_stop((exec_ctx), (call_combiner), (reason))
+#define GRPC_CALL_COMBINER_START(call_combiner, closure, error, reason) \
+  grpc_call_combiner_start((call_combiner), (closure), (error), (reason))
+#define GRPC_CALL_COMBINER_STOP(call_combiner, reason) \
+  grpc_call_combiner_stop((call_combiner), (reason))
 /// Starts processing \a closure on \a call_combiner.
-void grpc_call_combiner_start(grpc_exec_ctx* exec_ctx,
-                              grpc_call_combiner* call_combiner,
+void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
                               grpc_closure* closure, grpc_error* error,
                               const char* reason);
 /// Yields the call combiner to the next closure in the queue, if any.
-void grpc_call_combiner_stop(grpc_exec_ctx* exec_ctx,
-                             grpc_call_combiner* call_combiner,
+void grpc_call_combiner_stop(grpc_call_combiner* call_combiner,
                              const char* reason);
 #endif
 
@@ -109,13 +101,11 @@
 /// cancellation; this effectively unregisters the previously set closure.
 /// However, most filters will not need to explicitly unregister their
 /// callbacks, as this is done automatically when the call is destroyed.
-void grpc_call_combiner_set_notify_on_cancel(grpc_exec_ctx* exec_ctx,
-                                             grpc_call_combiner* call_combiner,
+void grpc_call_combiner_set_notify_on_cancel(grpc_call_combiner* call_combiner,
                                              grpc_closure* closure);
 
 /// Indicates that the call has been cancelled.
-void grpc_call_combiner_cancel(grpc_exec_ctx* exec_ctx,
-                               grpc_call_combiner* call_combiner,
+void grpc_call_combiner_cancel(grpc_call_combiner* call_combiner,
                                grpc_error* error);
 
 #endif /* GRPC_CORE_LIB_IOMGR_CALL_COMBINER_H */
diff --git a/src/core/lib/iomgr/closure.h b/src/core/lib/iomgr/closure.h
index 46793dd..88af760 100644
--- a/src/core/lib/iomgr/closure.h
+++ b/src/core/lib/iomgr/closure.h
@@ -47,18 +47,15 @@
  *              describing what went wrong.
  *              Error contract: it is not the cb's job to unref this error;
  *              the closure scheduler will do that after the cb returns */
-typedef void (*grpc_iomgr_cb_func)(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error);
+typedef void (*grpc_iomgr_cb_func)(void* arg, grpc_error* error);
 
 typedef struct grpc_closure_scheduler grpc_closure_scheduler;
 
 typedef struct grpc_closure_scheduler_vtable {
   /* NOTE: for all these functions, closure->scheduler == the scheduler that was
            used to find this vtable */
-  void (*run)(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-              grpc_error* error);
-  void (*sched)(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                grpc_error* error);
+  void (*run)(grpc_closure* closure, grpc_error* error);
+  void (*sched)(grpc_closure* closure, grpc_error* error);
   const char* name;
 } grpc_closure_scheduler_vtable;
 
@@ -146,13 +143,12 @@
   grpc_closure wrapper;
 } wrapped_closure;
 
-inline void closure_wrapper(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+inline void closure_wrapper(void* arg, grpc_error* error) {
   wrapped_closure* wc = (wrapped_closure*)arg;
   grpc_iomgr_cb_func cb = wc->cb;
   void* cb_arg = wc->cb_arg;
   gpr_free(wc);
-  cb(exec_ctx, cb_arg, error);
+  cb(cb_arg, error);
 }
 
 }  // namespace closure_impl
@@ -247,12 +243,10 @@
 }
 
 #ifndef NDEBUG
-inline void grpc_closure_run(const char* file, int line,
-                             grpc_exec_ctx* exec_ctx, grpc_closure* c,
+inline void grpc_closure_run(const char* file, int line, grpc_closure* c,
                              grpc_error* error) {
 #else
-inline void grpc_closure_run(grpc_exec_ctx* exec_ctx, grpc_closure* c,
-                             grpc_error* error) {
+inline void grpc_closure_run(grpc_closure* c, grpc_error* error) {
 #endif
   GPR_TIMER_BEGIN("grpc_closure_run", 0);
   if (c != nullptr) {
@@ -262,7 +256,7 @@
     c->run = true;
 #endif
     assert(c->cb);
-    c->scheduler->vtable->run(exec_ctx, c, error);
+    c->scheduler->vtable->run(c, error);
   } else {
     GRPC_ERROR_UNREF(error);
   }
@@ -273,20 +267,17 @@
  *  Note that calling this at the end of a closure callback function itself is
  *  by definition safe. */
 #ifndef NDEBUG
-#define GRPC_CLOSURE_RUN(exec_ctx, closure, error) \
-  grpc_closure_run(__FILE__, __LINE__, exec_ctx, closure, error)
+#define GRPC_CLOSURE_RUN(closure, error) \
+  grpc_closure_run(__FILE__, __LINE__, closure, error)
 #else
-#define GRPC_CLOSURE_RUN(exec_ctx, closure, error) \
-  grpc_closure_run(exec_ctx, closure, error)
+#define GRPC_CLOSURE_RUN(closure, error) grpc_closure_run(closure, error)
 #endif
 
 #ifndef NDEBUG
-inline void grpc_closure_sched(const char* file, int line,
-                               grpc_exec_ctx* exec_ctx, grpc_closure* c,
+inline void grpc_closure_sched(const char* file, int line, grpc_closure* c,
                                grpc_error* error) {
 #else
-inline void grpc_closure_sched(grpc_exec_ctx* exec_ctx, grpc_closure* c,
-                               grpc_error* error) {
+inline void grpc_closure_sched(grpc_closure* c, grpc_error* error) {
 #endif
   GPR_TIMER_BEGIN("grpc_closure_sched", 0);
   if (c != nullptr) {
@@ -305,7 +296,7 @@
     c->run = false;
 #endif
     assert(c->cb);
-    c->scheduler->vtable->sched(exec_ctx, c, error);
+    c->scheduler->vtable->sched(c, error);
   } else {
     GRPC_ERROR_UNREF(error);
   }
@@ -314,20 +305,17 @@
 
 /** Schedule a closure to be run. Does not need to be run from a safe point. */
 #ifndef NDEBUG
-#define GRPC_CLOSURE_SCHED(exec_ctx, closure, error) \
-  grpc_closure_sched(__FILE__, __LINE__, exec_ctx, closure, error)
+#define GRPC_CLOSURE_SCHED(closure, error) \
+  grpc_closure_sched(__FILE__, __LINE__, closure, error)
 #else
-#define GRPC_CLOSURE_SCHED(exec_ctx, closure, error) \
-  grpc_closure_sched(exec_ctx, closure, error)
+#define GRPC_CLOSURE_SCHED(closure, error) grpc_closure_sched(closure, error)
 #endif
 
 #ifndef NDEBUG
 inline void grpc_closure_list_sched(const char* file, int line,
-                                    grpc_exec_ctx* exec_ctx,
                                     grpc_closure_list* list) {
 #else
-inline void grpc_closure_list_sched(grpc_exec_ctx* exec_ctx,
-                                    grpc_closure_list* list) {
+inline void grpc_closure_list_sched(grpc_closure_list* list) {
 #endif
   grpc_closure* c = list->head;
   while (c != nullptr) {
@@ -347,7 +335,7 @@
     c->run = false;
 #endif
     assert(c->cb);
-    c->scheduler->vtable->sched(exec_ctx, c, c->error_data.error);
+    c->scheduler->vtable->sched(c, c->error_data.error);
     c = next;
   }
   list->head = list->tail = nullptr;
@@ -356,11 +344,11 @@
 /** Schedule all closures in a list to be run. Does not need to be run from a
  * safe point. */
 #ifndef NDEBUG
-#define GRPC_CLOSURE_LIST_SCHED(exec_ctx, closure_list) \
-  grpc_closure_list_sched(__FILE__, __LINE__, exec_ctx, closure_list)
+#define GRPC_CLOSURE_LIST_SCHED(closure_list) \
+  grpc_closure_list_sched(__FILE__, __LINE__, closure_list)
 #else
-#define GRPC_CLOSURE_LIST_SCHED(exec_ctx, closure_list) \
-  grpc_closure_list_sched(exec_ctx, closure_list)
+#define GRPC_CLOSURE_LIST_SCHED(closure_list) \
+  grpc_closure_list_sched(closure_list)
 #endif
 
 #endif /* GRPC_CORE_LIB_IOMGR_CLOSURE_H */
diff --git a/src/core/lib/iomgr/combiner.cc b/src/core/lib/iomgr/combiner.cc
index 15c009d..e4d7a6a 100644
--- a/src/core/lib/iomgr/combiner.cc
+++ b/src/core/lib/iomgr/combiner.cc
@@ -61,17 +61,15 @@
   gpr_refcount refs;
 };
 
-static void combiner_exec(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                          grpc_error* error);
-static void combiner_finally_exec(grpc_exec_ctx* exec_ctx,
-                                  grpc_closure* closure, grpc_error* error);
+static void combiner_exec(grpc_closure* closure, grpc_error* error);
+static void combiner_finally_exec(grpc_closure* closure, grpc_error* error);
 
 static const grpc_closure_scheduler_vtable scheduler = {
     combiner_exec, combiner_exec, "combiner:immediately"};
 static const grpc_closure_scheduler_vtable finally_scheduler = {
     combiner_finally_exec, combiner_finally_exec, "combiner:finally"};
 
-static void offload(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error);
+static void offload(void* arg, grpc_error* error);
 
 grpc_combiner* grpc_combiner_create(void) {
   grpc_combiner* lock = (grpc_combiner*)gpr_zalloc(sizeof(*lock));
@@ -87,19 +85,19 @@
   return lock;
 }
 
-static void really_destroy(grpc_exec_ctx* exec_ctx, grpc_combiner* lock) {
+static void really_destroy(grpc_combiner* lock) {
   GRPC_COMBINER_TRACE(gpr_log(GPR_DEBUG, "C:%p really_destroy", lock));
   GPR_ASSERT(gpr_atm_no_barrier_load(&lock->state) == 0);
   gpr_mpscq_destroy(&lock->queue);
   gpr_free(lock);
 }
 
-static void start_destroy(grpc_exec_ctx* exec_ctx, grpc_combiner* lock) {
+static void start_destroy(grpc_combiner* lock) {
   gpr_atm old_state = gpr_atm_full_fetch_add(&lock->state, -STATE_UNORPHANED);
   GRPC_COMBINER_TRACE(gpr_log(
       GPR_DEBUG, "C:%p really_destroy old_state=%" PRIdPTR, lock, old_state));
   if (old_state == 1) {
-    really_destroy(exec_ctx, lock);
+    really_destroy(lock);
   }
 }
 
@@ -115,11 +113,10 @@
 #define GRPC_COMBINER_DEBUG_SPAM(op, delta)
 #endif
 
-void grpc_combiner_unref(grpc_exec_ctx* exec_ctx,
-                         grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS) {
+void grpc_combiner_unref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS) {
   GRPC_COMBINER_DEBUG_SPAM("UNREF", -1);
   if (gpr_unref(&lock->refs)) {
-    start_destroy(exec_ctx, lock);
+    start_destroy(lock);
   }
 }
 
@@ -129,23 +126,25 @@
   return lock;
 }
 
-static void push_last_on_exec_ctx(grpc_exec_ctx* exec_ctx,
-                                  grpc_combiner* lock) {
+static void push_last_on_exec_ctx(grpc_combiner* lock) {
   lock->next_combiner_on_this_exec_ctx = nullptr;
-  if (exec_ctx->active_combiner == nullptr) {
-    exec_ctx->active_combiner = exec_ctx->last_combiner = lock;
+  if (grpc_core::ExecCtx::Get()->combiner_data()->active_combiner == nullptr) {
+    grpc_core::ExecCtx::Get()->combiner_data()->active_combiner =
+        grpc_core::ExecCtx::Get()->combiner_data()->last_combiner = lock;
   } else {
-    exec_ctx->last_combiner->next_combiner_on_this_exec_ctx = lock;
-    exec_ctx->last_combiner = lock;
+    grpc_core::ExecCtx::Get()
+        ->combiner_data()
+        ->last_combiner->next_combiner_on_this_exec_ctx = lock;
+    grpc_core::ExecCtx::Get()->combiner_data()->last_combiner = lock;
   }
 }
 
-static void push_first_on_exec_ctx(grpc_exec_ctx* exec_ctx,
-                                   grpc_combiner* lock) {
-  lock->next_combiner_on_this_exec_ctx = exec_ctx->active_combiner;
-  exec_ctx->active_combiner = lock;
+static void push_first_on_exec_ctx(grpc_combiner* lock) {
+  lock->next_combiner_on_this_exec_ctx =
+      grpc_core::ExecCtx::Get()->combiner_data()->active_combiner;
+  grpc_core::ExecCtx::Get()->combiner_data()->active_combiner = lock;
   if (lock->next_combiner_on_this_exec_ctx == nullptr) {
-    exec_ctx->last_combiner = lock;
+    grpc_core::ExecCtx::Get()->combiner_data()->last_combiner = lock;
   }
 }
 
@@ -153,9 +152,8 @@
   ((grpc_combiner*)(((char*)((closure)->scheduler)) -            \
                     offsetof(grpc_combiner, scheduler_name)))
 
-static void combiner_exec(grpc_exec_ctx* exec_ctx, grpc_closure* cl,
-                          grpc_error* error) {
-  GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS(exec_ctx);
+static void combiner_exec(grpc_closure* cl, grpc_error* error) {
+  GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS();
   GPR_TIMER_BEGIN("combiner.execute", 0);
   grpc_combiner* lock = COMBINER_FROM_CLOSURE_SCHEDULER(cl, scheduler);
   gpr_atm last = gpr_atm_full_fetch_add(&lock->state, STATE_ELEM_COUNT_LOW_BIT);
@@ -163,19 +161,19 @@
                               "C:%p grpc_combiner_execute c=%p last=%" PRIdPTR,
                               lock, cl, last));
   if (last == 1) {
-    GRPC_STATS_INC_COMBINER_LOCKS_INITIATED(exec_ctx);
+    GRPC_STATS_INC_COMBINER_LOCKS_INITIATED();
     GPR_TIMER_MARK("combiner.initiated", 0);
     gpr_atm_no_barrier_store(&lock->initiating_exec_ctx_or_null,
-                             (gpr_atm)exec_ctx);
+                             (gpr_atm)grpc_core::ExecCtx::Get());
     // first element on this list: add it to the list of combiner locks
     // executing within this exec_ctx
-    push_last_on_exec_ctx(exec_ctx, lock);
+    push_last_on_exec_ctx(lock);
   } else {
     // there may be a race with setting here: if that happens, we may delay
     // offload for one or two actions, and that's fine
     gpr_atm initiator =
         gpr_atm_no_barrier_load(&lock->initiating_exec_ctx_or_null);
-    if (initiator != 0 && initiator != (gpr_atm)exec_ctx) {
+    if (initiator != 0 && initiator != (gpr_atm)grpc_core::ExecCtx::Get()) {
       gpr_atm_no_barrier_store(&lock->initiating_exec_ctx_or_null, 0);
     }
   }
@@ -186,29 +184,32 @@
   GPR_TIMER_END("combiner.execute", 0);
 }
 
-static void move_next(grpc_exec_ctx* exec_ctx) {
-  exec_ctx->active_combiner =
-      exec_ctx->active_combiner->next_combiner_on_this_exec_ctx;
-  if (exec_ctx->active_combiner == nullptr) {
-    exec_ctx->last_combiner = nullptr;
+static void move_next() {
+  grpc_core::ExecCtx::Get()->combiner_data()->active_combiner =
+      grpc_core::ExecCtx::Get()
+          ->combiner_data()
+          ->active_combiner->next_combiner_on_this_exec_ctx;
+  if (grpc_core::ExecCtx::Get()->combiner_data()->active_combiner == nullptr) {
+    grpc_core::ExecCtx::Get()->combiner_data()->last_combiner = nullptr;
   }
 }
 
-static void offload(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void offload(void* arg, grpc_error* error) {
   grpc_combiner* lock = (grpc_combiner*)arg;
-  push_last_on_exec_ctx(exec_ctx, lock);
+  push_last_on_exec_ctx(lock);
 }
 
-static void queue_offload(grpc_exec_ctx* exec_ctx, grpc_combiner* lock) {
-  GRPC_STATS_INC_COMBINER_LOCKS_OFFLOADED(exec_ctx);
-  move_next(exec_ctx);
+static void queue_offload(grpc_combiner* lock) {
+  GRPC_STATS_INC_COMBINER_LOCKS_OFFLOADED();
+  move_next();
   GRPC_COMBINER_TRACE(gpr_log(GPR_DEBUG, "C:%p queue_offload", lock));
-  GRPC_CLOSURE_SCHED(exec_ctx, &lock->offload, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&lock->offload, GRPC_ERROR_NONE);
 }
 
-bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx) {
+bool grpc_combiner_continue_exec_ctx() {
   GPR_TIMER_BEGIN("combiner.continue_exec_ctx", 0);
-  grpc_combiner* lock = exec_ctx->active_combiner;
+  grpc_combiner* lock =
+      grpc_core::ExecCtx::Get()->combiner_data()->active_combiner;
   if (lock == nullptr) {
     GPR_TIMER_END("combiner.continue_exec_ctx", 0);
     return false;
@@ -223,15 +224,15 @@
                               "exec_ctx_ready_to_finish=%d "
                               "time_to_execute_final_list=%d",
                               lock, contended,
-                              grpc_exec_ctx_ready_to_finish(exec_ctx),
+                              grpc_core::ExecCtx::Get()->IsReadyToFinish(),
                               lock->time_to_execute_final_list));
 
-  if (contended && grpc_exec_ctx_ready_to_finish(exec_ctx) &&
+  if (contended && grpc_core::ExecCtx::Get()->IsReadyToFinish() &&
       grpc_executor_is_threaded()) {
     GPR_TIMER_MARK("offload_from_finished_exec_ctx", 0);
     // this execution context wants to move on: schedule remaining work to be
     // picked up on the executor
-    queue_offload(exec_ctx, lock);
+    queue_offload(lock);
     GPR_TIMER_END("combiner.continue_exec_ctx", 0);
     return true;
   }
@@ -247,7 +248,7 @@
       // queue is in an inconsistent state: use this as a cue that we should
       // go off and do something else for a while (and come back later)
       GPR_TIMER_MARK("delay_busy", 0);
-      queue_offload(exec_ctx, lock);
+      queue_offload(lock);
       GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       return true;
     }
@@ -257,7 +258,7 @@
 #ifndef NDEBUG
     cl->scheduled = false;
 #endif
-    cl->cb(exec_ctx, cl->cb_arg, cl_err);
+    cl->cb(cl->cb_arg, cl_err);
     GRPC_ERROR_UNREF(cl_err);
     GPR_TIMER_END("combiner.exec1", 0);
   } else {
@@ -274,7 +275,7 @@
 #ifndef NDEBUG
       c->scheduled = false;
 #endif
-      c->cb(exec_ctx, c->cb_arg, error);
+      c->cb(c->cb_arg, error);
       GRPC_ERROR_UNREF(error);
       c = next;
       GPR_TIMER_END("combiner.exec_1final", 0);
@@ -282,7 +283,7 @@
   }
 
   GPR_TIMER_MARK("unref", 0);
-  move_next(exec_ctx);
+  move_next();
   lock->time_to_execute_final_list = false;
   gpr_atm old_state =
       gpr_atm_full_fetch_add(&lock->state, -STATE_ELEM_COUNT_LOW_BIT);
@@ -311,7 +312,7 @@
       return true;
     case OLD_STATE_WAS(true, 1):
       // and one count, one orphaned --> unlocked and orphaned
-      really_destroy(exec_ctx, lock);
+      really_destroy(lock);
       GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       return true;
     case OLD_STATE_WAS(false, 0):
@@ -321,27 +322,24 @@
       GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       GPR_UNREACHABLE_CODE(return true);
   }
-  push_first_on_exec_ctx(exec_ctx, lock);
+  push_first_on_exec_ctx(lock);
   GPR_TIMER_END("combiner.continue_exec_ctx", 0);
   return true;
 }
 
-static void enqueue_finally(grpc_exec_ctx* exec_ctx, void* closure,
-                            grpc_error* error);
+static void enqueue_finally(void* closure, grpc_error* error);
 
-static void combiner_finally_exec(grpc_exec_ctx* exec_ctx,
-                                  grpc_closure* closure, grpc_error* error) {
-  GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS(exec_ctx);
+static void combiner_finally_exec(grpc_closure* closure, grpc_error* error) {
+  GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS();
   grpc_combiner* lock =
       COMBINER_FROM_CLOSURE_SCHEDULER(closure, finally_scheduler);
-  GRPC_COMBINER_TRACE(gpr_log(GPR_DEBUG,
-                              "C:%p grpc_combiner_execute_finally c=%p; ac=%p",
-                              lock, closure, exec_ctx->active_combiner));
+  GRPC_COMBINER_TRACE(gpr_log(
+      GPR_DEBUG, "C:%p grpc_combiner_execute_finally c=%p; ac=%p", lock,
+      closure, grpc_core::ExecCtx::Get()->combiner_data()->active_combiner));
   GPR_TIMER_BEGIN("combiner.execute_finally", 0);
-  if (exec_ctx->active_combiner != lock) {
+  if (grpc_core::ExecCtx::Get()->combiner_data()->active_combiner != lock) {
     GPR_TIMER_MARK("slowpath", 0);
-    GRPC_CLOSURE_SCHED(exec_ctx,
-                       GRPC_CLOSURE_CREATE(enqueue_finally, closure,
+    GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(enqueue_finally, closure,
                                            grpc_combiner_scheduler(lock)),
                        error);
     GPR_TIMER_END("combiner.execute_finally", 0);
@@ -355,10 +353,8 @@
   GPR_TIMER_END("combiner.execute_finally", 0);
 }
 
-static void enqueue_finally(grpc_exec_ctx* exec_ctx, void* closure,
-                            grpc_error* error) {
-  combiner_finally_exec(exec_ctx, (grpc_closure*)closure,
-                        GRPC_ERROR_REF(error));
+static void enqueue_finally(void* closure, grpc_error* error) {
+  combiner_finally_exec((grpc_closure*)closure, GRPC_ERROR_REF(error));
 }
 
 grpc_closure_scheduler* grpc_combiner_scheduler(grpc_combiner* combiner) {
diff --git a/src/core/lib/iomgr/combiner.h b/src/core/lib/iomgr/combiner.h
index 0c05511..46b9ac5 100644
--- a/src/core/lib/iomgr/combiner.h
+++ b/src/core/lib/iomgr/combiner.h
@@ -40,26 +40,24 @@
   , const char *file, int line, const char *reason
 #define GRPC_COMBINER_REF(combiner, reason) \
   grpc_combiner_ref((combiner), __FILE__, __LINE__, (reason))
-#define GRPC_COMBINER_UNREF(exec_ctx, combiner, reason) \
-  grpc_combiner_unref((exec_ctx), (combiner), __FILE__, __LINE__, (reason))
+#define GRPC_COMBINER_UNREF(combiner, reason) \
+  grpc_combiner_unref((combiner), __FILE__, __LINE__, (reason))
 #else
 #define GRPC_COMBINER_DEBUG_ARGS
 #define GRPC_COMBINER_REF(combiner, reason) grpc_combiner_ref((combiner))
-#define GRPC_COMBINER_UNREF(exec_ctx, combiner, reason) \
-  grpc_combiner_unref((exec_ctx), (combiner))
+#define GRPC_COMBINER_UNREF(combiner, reason) grpc_combiner_unref((combiner))
 #endif
 
 // Ref/unref the lock, for when we're sharing the lock ownership
 // Prefer to use the macros above
 grpc_combiner* grpc_combiner_ref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS);
-void grpc_combiner_unref(grpc_exec_ctx* exec_ctx,
-                         grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS);
+void grpc_combiner_unref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS);
 // Fetch a scheduler to schedule closures against
 grpc_closure_scheduler* grpc_combiner_scheduler(grpc_combiner* lock);
 // Scheduler to execute \a action within the lock just prior to unlocking.
 grpc_closure_scheduler* grpc_combiner_finally_scheduler(grpc_combiner* lock);
 
-bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx* exec_ctx);
+bool grpc_combiner_continue_exec_ctx();
 
 extern grpc_core::TraceFlag grpc_combiner_trace;
 
diff --git a/src/core/lib/iomgr/endpoint.cc b/src/core/lib/iomgr/endpoint.cc
index 5eab1d3..9d4b102 100644
--- a/src/core/lib/iomgr/endpoint.cc
+++ b/src/core/lib/iomgr/endpoint.cc
@@ -18,41 +18,35 @@
 
 #include "src/core/lib/iomgr/endpoint.h"
 
-void grpc_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_slice_buffer* slices, grpc_closure* cb) {
-  ep->vtable->read(exec_ctx, ep, slices, cb);
+void grpc_endpoint_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                        grpc_closure* cb) {
+  ep->vtable->read(ep, slices, cb);
 }
 
-void grpc_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_slice_buffer* slices, grpc_closure* cb) {
-  ep->vtable->write(exec_ctx, ep, slices, cb);
+void grpc_endpoint_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                         grpc_closure* cb) {
+  ep->vtable->write(ep, slices, cb);
 }
 
-void grpc_endpoint_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                  grpc_pollset* pollset) {
-  ep->vtable->add_to_pollset(exec_ctx, ep, pollset);
+void grpc_endpoint_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
+  ep->vtable->add_to_pollset(ep, pollset);
 }
 
-void grpc_endpoint_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_endpoint* ep,
+void grpc_endpoint_add_to_pollset_set(grpc_endpoint* ep,
                                       grpc_pollset_set* pollset_set) {
-  ep->vtable->add_to_pollset_set(exec_ctx, ep, pollset_set);
+  ep->vtable->add_to_pollset_set(ep, pollset_set);
 }
 
-void grpc_endpoint_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                           grpc_endpoint* ep,
+void grpc_endpoint_delete_from_pollset_set(grpc_endpoint* ep,
                                            grpc_pollset_set* pollset_set) {
-  ep->vtable->delete_from_pollset_set(exec_ctx, ep, pollset_set);
+  ep->vtable->delete_from_pollset_set(ep, pollset_set);
 }
 
-void grpc_endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                            grpc_error* why) {
-  ep->vtable->shutdown(exec_ctx, ep, why);
+void grpc_endpoint_shutdown(grpc_endpoint* ep, grpc_error* why) {
+  ep->vtable->shutdown(ep, why);
 }
 
-void grpc_endpoint_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
-  ep->vtable->destroy(exec_ctx, ep);
-}
+void grpc_endpoint_destroy(grpc_endpoint* ep) { ep->vtable->destroy(ep); }
 
 char* grpc_endpoint_get_peer(grpc_endpoint* ep) {
   return ep->vtable->get_peer(ep);
diff --git a/src/core/lib/iomgr/endpoint.h b/src/core/lib/iomgr/endpoint.h
index 6ab0a65..cd53099 100644
--- a/src/core/lib/iomgr/endpoint.h
+++ b/src/core/lib/iomgr/endpoint.h
@@ -33,18 +33,13 @@
 typedef struct grpc_endpoint_vtable grpc_endpoint_vtable;
 
 struct grpc_endpoint_vtable {
-  void (*read)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-               grpc_slice_buffer* slices, grpc_closure* cb);
-  void (*write)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                grpc_slice_buffer* slices, grpc_closure* cb);
-  void (*add_to_pollset)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_pollset* pollset);
-  void (*add_to_pollset_set)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                             grpc_pollset_set* pollset);
-  void (*delete_from_pollset_set)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                  grpc_pollset_set* pollset);
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep, grpc_error* why);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep);
+  void (*read)(grpc_endpoint* ep, grpc_slice_buffer* slices, grpc_closure* cb);
+  void (*write)(grpc_endpoint* ep, grpc_slice_buffer* slices, grpc_closure* cb);
+  void (*add_to_pollset)(grpc_endpoint* ep, grpc_pollset* pollset);
+  void (*add_to_pollset_set)(grpc_endpoint* ep, grpc_pollset_set* pollset);
+  void (*delete_from_pollset_set)(grpc_endpoint* ep, grpc_pollset_set* pollset);
+  void (*shutdown)(grpc_endpoint* ep, grpc_error* why);
+  void (*destroy)(grpc_endpoint* ep);
   grpc_resource_user* (*get_resource_user)(grpc_endpoint* ep);
   char* (*get_peer)(grpc_endpoint* ep);
   int (*get_fd)(grpc_endpoint* ep);
@@ -55,8 +50,8 @@
    indicates the endpoint is closed.
    Valid slices may be placed into \a slices even when the callback is
    invoked with error != GRPC_ERROR_NONE. */
-void grpc_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_slice_buffer* slices, grpc_closure* cb);
+void grpc_endpoint_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                        grpc_closure* cb);
 
 char* grpc_endpoint_get_peer(grpc_endpoint* ep);
 
@@ -74,26 +69,22 @@
    No guarantee is made to the content of slices after a write EXCEPT that
    it is a valid slice buffer.
    */
-void grpc_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_slice_buffer* slices, grpc_closure* cb);
+void grpc_endpoint_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                         grpc_closure* cb);
 
 /* Causes any pending and future read/write callbacks to run immediately with
    success==0 */
-void grpc_endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                            grpc_error* why);
-void grpc_endpoint_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep);
+void grpc_endpoint_shutdown(grpc_endpoint* ep, grpc_error* why);
+void grpc_endpoint_destroy(grpc_endpoint* ep);
 
 /* Add an endpoint to a pollset or pollset_set, so that when the pollset is
    polled, events from this endpoint are considered */
-void grpc_endpoint_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                  grpc_pollset* pollset);
-void grpc_endpoint_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_endpoint* ep,
+void grpc_endpoint_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset);
+void grpc_endpoint_add_to_pollset_set(grpc_endpoint* ep,
                                       grpc_pollset_set* pollset_set);
 
 /* Delete an endpoint from a pollset_set */
-void grpc_endpoint_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                           grpc_endpoint* ep,
+void grpc_endpoint_delete_from_pollset_set(grpc_endpoint* ep,
                                            grpc_pollset_set* pollset_set);
 
 grpc_resource_user* grpc_endpoint_get_resource_user(grpc_endpoint* endpoint);
diff --git a/src/core/lib/iomgr/endpoint_pair_posix.cc b/src/core/lib/iomgr/endpoint_pair_posix.cc
index f5f59f9..0b4aefd 100644
--- a/src/core/lib/iomgr/endpoint_pair_posix.cc
+++ b/src/core/lib/iomgr/endpoint_pair_posix.cc
@@ -54,18 +54,17 @@
   char* final_name;
   create_sockets(sv);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_asprintf(&final_name, "%s:client", name);
-  p.client = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], final_name), args,
+  p.client = grpc_tcp_create(grpc_fd_create(sv[1], final_name), args,
                              "socketpair-server");
   gpr_free(final_name);
   gpr_asprintf(&final_name, "%s:server", name);
-  p.server = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[0], final_name), args,
+  p.server = grpc_tcp_create(grpc_fd_create(sv[0], final_name), args,
                              "socketpair-client");
   gpr_free(final_name);
 
-  grpc_exec_ctx_finish(&exec_ctx);
   return p;
 }
 
diff --git a/src/core/lib/iomgr/endpoint_pair_windows.cc b/src/core/lib/iomgr/endpoint_pair_windows.cc
index afa995a..cc07ac0 100644
--- a/src/core/lib/iomgr/endpoint_pair_windows.cc
+++ b/src/core/lib/iomgr/endpoint_pair_windows.cc
@@ -72,14 +72,12 @@
   SOCKET sv[2];
   grpc_endpoint_pair p;
   create_sockets(sv);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  p.client = grpc_tcp_create(&exec_ctx,
-                             grpc_winsocket_create(sv[1], "endpoint:client"),
+  grpc_core::ExecCtx exec_ctx;
+  p.client = grpc_tcp_create(grpc_winsocket_create(sv[1], "endpoint:client"),
                              channel_args, "endpoint:server");
-  p.server = grpc_tcp_create(&exec_ctx,
-                             grpc_winsocket_create(sv[0], "endpoint:server"),
+  p.server = grpc_tcp_create(grpc_winsocket_create(sv[0], "endpoint:server"),
                              channel_args, "endpoint:client");
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return p;
 }
 
diff --git a/src/core/lib/iomgr/error.cc b/src/core/lib/iomgr/error.cc
index e6d640c..42cd7c4 100644
--- a/src/core/lib/iomgr/error.cc
+++ b/src/core/lib/iomgr/error.cc
@@ -156,11 +156,7 @@
   }
 }
 
-static void unref_slice(grpc_slice slice) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_unref_internal(&exec_ctx, slice);
-  grpc_exec_ctx_finish(&exec_ctx);
-}
+static void unref_slice(grpc_slice slice) { grpc_slice_unref_internal(slice); }
 
 static void unref_strs(grpc_error* err) {
   for (size_t which = 0; which < GRPC_ERROR_STR_MAX; ++which) {
diff --git a/src/core/lib/iomgr/ev_epoll1_linux.cc b/src/core/lib/iomgr/ev_epoll1_linux.cc
index a52bede..ae9d47e 100644
--- a/src/core/lib/iomgr/ev_epoll1_linux.cc
+++ b/src/core/lib/iomgr/ev_epoll1_linux.cc
@@ -299,31 +299,29 @@
 /* if 'releasing_fd' is true, it means that we are going to detach the internal
  * fd from grpc_fd structure (i.e which means we should not be calling
  * shutdown() syscall on that fd) */
-static void fd_shutdown_internal(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                                 grpc_error* why, bool releasing_fd) {
-  if (fd->read_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why))) {
+static void fd_shutdown_internal(grpc_fd* fd, grpc_error* why,
+                                 bool releasing_fd) {
+  if (fd->read_closure->SetShutdown(GRPC_ERROR_REF(why))) {
     if (!releasing_fd) {
       shutdown(fd->fd, SHUT_RDWR);
     }
-    fd->write_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why));
+    fd->write_closure->SetShutdown(GRPC_ERROR_REF(why));
   }
   GRPC_ERROR_UNREF(why);
 }
 
 /* Might be called multiple times */
-static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
-  fd_shutdown_internal(exec_ctx, fd, why, false);
+static void fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  fd_shutdown_internal(fd, why, false);
 }
 
-static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                      grpc_closure* on_done, int* release_fd,
+static void fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                       bool already_closed, const char* reason) {
   grpc_error* error = GRPC_ERROR_NONE;
   bool is_release_fd = (release_fd != nullptr);
 
   if (!fd->read_closure->IsShutdown()) {
-    fd_shutdown_internal(exec_ctx, fd,
-                         GRPC_ERROR_CREATE_FROM_COPIED_STRING(reason),
+    fd_shutdown_internal(fd, GRPC_ERROR_CREATE_FROM_COPIED_STRING(reason),
                          is_release_fd);
   }
 
@@ -335,7 +333,7 @@
     close(fd->fd);
   }
 
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_REF(error));
 
   grpc_iomgr_unregister_object(&fd->iomgr_object);
   fd->read_closure->DestroyEvent();
@@ -347,8 +345,7 @@
   gpr_mu_unlock(&fd_freelist_mu);
 }
 
-static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                  grpc_fd* fd) {
+static grpc_pollset* fd_get_read_notifier_pollset(grpc_fd* fd) {
   gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset);
   return (grpc_pollset*)notifier;
 }
@@ -357,26 +354,21 @@
   return fd->read_closure->IsShutdown();
 }
 
-static void fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                              grpc_closure* closure) {
-  fd->read_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
+  fd->read_closure->NotifyOn(closure);
 }
 
-static void fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_closure* closure) {
-  fd->write_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
+  fd->write_closure->NotifyOn(closure);
 }
 
-static void fd_become_readable(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_pollset* notifier) {
-  fd->read_closure->SetReady(exec_ctx);
+static void fd_become_readable(grpc_fd* fd, grpc_pollset* notifier) {
+  fd->read_closure->SetReady();
   /* Use release store to match with acquire load in fd_get_read_notifier */
   gpr_atm_rel_store(&fd->read_notifier_pollset, (gpr_atm)notifier);
 }
 
-static void fd_become_writable(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
-  fd->write_closure->SetReady(exec_ctx);
-}
+static void fd_become_writable(grpc_fd* fd) { fd->write_closure->SetReady(); }
 
 /*******************************************************************************
  * Pollset Definitions
@@ -479,7 +471,7 @@
   pollset->next = pollset->prev = nullptr;
 }
 
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void pollset_destroy(grpc_pollset* pollset) {
   gpr_mu_lock(&pollset->mu);
   if (!pollset->seen_inactive) {
     pollset_neighborhood* neighborhood = pollset->neighborhood;
@@ -507,27 +499,26 @@
   gpr_mu_destroy(&pollset->mu);
 }
 
-static grpc_error* pollset_kick_all(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset* pollset) {
+static grpc_error* pollset_kick_all(grpc_pollset* pollset) {
   GPR_TIMER_BEGIN("pollset_kick_all", 0);
   grpc_error* error = GRPC_ERROR_NONE;
   if (pollset->root_worker != nullptr) {
     grpc_pollset_worker* worker = pollset->root_worker;
     do {
-      GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+      GRPC_STATS_INC_POLLSET_KICK();
       switch (worker->state) {
         case KICKED:
-          GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+          GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
           break;
         case UNKICKED:
           SET_KICK_STATE(worker, KICKED);
           if (worker->initialized_cv) {
-            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
             gpr_cv_signal(&worker->cv);
           }
           break;
         case DESIGNATED_POLLER:
-          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
           SET_KICK_STATE(worker, KICKED);
           append_error(&error, grpc_wakeup_fd_wakeup(&global_wakeup_fd),
                        "pollset_kick_all");
@@ -543,32 +534,29 @@
   return error;
 }
 
-static void pollset_maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
-                                          grpc_pollset* pollset) {
+static void pollset_maybe_finish_shutdown(grpc_pollset* pollset) {
   if (pollset->shutdown_closure != nullptr && pollset->root_worker == nullptr &&
       pollset->begin_refs == 0) {
     GPR_TIMER_MARK("pollset_finish_shutdown", 0);
-    GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(pollset->shutdown_closure, GRPC_ERROR_NONE);
     pollset->shutdown_closure = nullptr;
   }
 }
 
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                             grpc_closure* closure) {
+static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_TIMER_BEGIN("pollset_shutdown", 0);
   GPR_ASSERT(pollset->shutdown_closure == nullptr);
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutdown_closure = closure;
   pollset->shutting_down = true;
-  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(exec_ctx, pollset));
-  pollset_maybe_finish_shutdown(exec_ctx, pollset);
+  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(pollset));
+  pollset_maybe_finish_shutdown(pollset);
   GPR_TIMER_END("pollset_shutdown", 0);
 }
 
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis millis) {
+static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   if (millis == GRPC_MILLIS_INF_FUTURE) return -1;
-  grpc_millis delta = millis - grpc_exec_ctx_now(exec_ctx);
+  grpc_millis delta = millis - grpc_core::ExecCtx::Get()->Now();
   if (delta > INT_MAX) {
     return INT_MAX;
   } else if (delta < 0) {
@@ -586,8 +574,7 @@
    NOTE ON SYNCRHONIZATION: Similar to do_epoll_wait(), this function is only
    called by g_active_poller thread. So there is no need for synchronization
    when accessing fields in g_epoll_set */
-static grpc_error* process_epoll_events(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset* pollset) {
+static grpc_error* process_epoll_events(grpc_pollset* pollset) {
   static const char* err_desc = "process_events";
   grpc_error* error = GRPC_ERROR_NONE;
 
@@ -611,11 +598,11 @@
       bool write_ev = (ev->events & EPOLLOUT) != 0;
 
       if (read_ev || cancel) {
-        fd_become_readable(exec_ctx, fd, pollset);
+        fd_become_readable(fd, pollset);
       }
 
       if (write_ev || cancel) {
-        fd_become_writable(exec_ctx, fd);
+        fd_become_writable(fd);
       }
     }
   }
@@ -631,27 +618,26 @@
    NOTE ON SYNCHRONIZATION: At any point of time, only the g_active_poller
    (i.e the designated poller thread) will be calling this function. So there is
    no need for any synchronization when accesing fields in g_epoll_set */
-static grpc_error* do_epoll_wait(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
-                                 grpc_millis deadline) {
+static grpc_error* do_epoll_wait(grpc_pollset* ps, grpc_millis deadline) {
   GPR_TIMER_BEGIN("do_epoll_wait", 0);
 
   int r;
-  int timeout = poll_deadline_to_millis_timeout(exec_ctx, deadline);
+  int timeout = poll_deadline_to_millis_timeout(deadline);
   if (timeout != 0) {
     GRPC_SCHEDULING_START_BLOCKING_REGION;
   }
   do {
-    GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+    GRPC_STATS_INC_SYSCALL_POLL();
     r = epoll_wait(g_epoll_set.epfd, g_epoll_set.events, MAX_EPOLL_EVENTS,
                    timeout);
   } while (r < 0 && errno == EINTR);
   if (timeout != 0) {
-    GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(exec_ctx);
+    GRPC_SCHEDULING_END_BLOCKING_REGION;
   }
 
   if (r < 0) return GRPC_OS_ERROR(errno, "epoll_wait");
 
-  GRPC_STATS_INC_POLL_EVENTS_RETURNED(exec_ctx, r);
+  GRPC_STATS_INC_POLL_EVENTS_RETURNED(r);
 
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "ps: %p poll got %d events", ps, r);
@@ -664,8 +650,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         grpc_pollset_worker* worker,
+static bool begin_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                          grpc_pollset_worker** worker_hdl,
                          grpc_millis deadline) {
   GPR_TIMER_BEGIN("begin_worker", 0);
@@ -760,7 +745,7 @@
         SET_KICK_STATE(worker, KICKED);
       }
     }
-    grpc_exec_ctx_invalidate_now(exec_ctx);
+    grpc_core::ExecCtx::Get()->InvalidateNow();
   }
 
   if (grpc_polling_trace.enabled()) {
@@ -791,7 +776,7 @@
 }
 
 static bool check_neighborhood_for_available_poller(
-    grpc_exec_ctx* exec_ctx, pollset_neighborhood* neighborhood) {
+    pollset_neighborhood* neighborhood) {
   GPR_TIMER_BEGIN("check_neighborhood_for_available_poller", 0);
   bool found_worker = false;
   do {
@@ -815,7 +800,7 @@
               SET_KICK_STATE(inspect_worker, DESIGNATED_POLLER);
               if (inspect_worker->initialized_cv) {
                 GPR_TIMER_MARK("signal worker", 0);
-                GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+                GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
                 gpr_cv_signal(&inspect_worker->cv);
               }
             } else {
@@ -855,8 +840,7 @@
   return found_worker;
 }
 
-static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                       grpc_pollset_worker* worker,
+static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                        grpc_pollset_worker** worker_hdl) {
   GPR_TIMER_BEGIN("end_worker", 0);
   if (grpc_polling_trace.enabled()) {
@@ -866,7 +850,7 @@
   /* Make sure we appear kicked */
   SET_KICK_STATE(worker, KICKED);
   grpc_closure_list_move(&worker->schedule_on_end_work,
-                         &exec_ctx->closure_list);
+                         grpc_core::ExecCtx::Get()->closure_list());
   if (gpr_atm_no_barrier_load(&g_active_poller) == (gpr_atm)worker) {
     if (worker->next != worker && worker->next->state == UNKICKED) {
       if (grpc_polling_trace.enabled()) {
@@ -875,11 +859,11 @@
       GPR_ASSERT(worker->next->initialized_cv);
       gpr_atm_no_barrier_store(&g_active_poller, (gpr_atm)worker->next);
       SET_KICK_STATE(worker->next, DESIGNATED_POLLER);
-      GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+      GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
       gpr_cv_signal(&worker->next->cv);
-      if (grpc_exec_ctx_has_work(exec_ctx)) {
+      if (grpc_core::ExecCtx::Get()->HasWork()) {
         gpr_mu_unlock(&pollset->mu);
-        grpc_exec_ctx_flush(exec_ctx);
+        grpc_core::ExecCtx::Get()->Flush();
         gpr_mu_lock(&pollset->mu);
       }
     } else {
@@ -894,8 +878,7 @@
             &g_neighborhoods[(poller_neighborhood_idx + i) %
                              g_num_neighborhoods];
         if (gpr_mu_trylock(&neighborhood->mu)) {
-          found_worker =
-              check_neighborhood_for_available_poller(exec_ctx, neighborhood);
+          found_worker = check_neighborhood_for_available_poller(neighborhood);
           gpr_mu_unlock(&neighborhood->mu);
           scan_state[i] = true;
         } else {
@@ -908,16 +891,15 @@
             &g_neighborhoods[(poller_neighborhood_idx + i) %
                              g_num_neighborhoods];
         gpr_mu_lock(&neighborhood->mu);
-        found_worker =
-            check_neighborhood_for_available_poller(exec_ctx, neighborhood);
+        found_worker = check_neighborhood_for_available_poller(neighborhood);
         gpr_mu_unlock(&neighborhood->mu);
       }
-      grpc_exec_ctx_flush(exec_ctx);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(&pollset->mu);
     }
-  } else if (grpc_exec_ctx_has_work(exec_ctx)) {
+  } else if (grpc_core::ExecCtx::Get()->HasWork()) {
     gpr_mu_unlock(&pollset->mu);
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(&pollset->mu);
   }
   if (worker->initialized_cv) {
@@ -927,7 +909,7 @@
     gpr_log(GPR_DEBUG, " .. remove worker");
   }
   if (EMPTIED == worker_remove(pollset, worker)) {
-    pollset_maybe_finish_shutdown(exec_ctx, pollset);
+    pollset_maybe_finish_shutdown(pollset);
   }
   GPR_ASSERT(gpr_atm_no_barrier_load(&g_active_poller) != (gpr_atm)worker);
   GPR_TIMER_END("end_worker", 0);
@@ -937,7 +919,7 @@
    The function pollset_work() may temporarily release the lock (pollset->po.mu)
    during the course of its execution but it will always re-acquire the lock and
    ensure that it is held by the time the function returns */
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
+static grpc_error* pollset_work(grpc_pollset* ps,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
   grpc_pollset_worker worker;
@@ -950,7 +932,7 @@
     return GRPC_ERROR_NONE;
   }
 
-  if (begin_worker(exec_ctx, ps, &worker, worker_hdl, deadline)) {
+  if (begin_worker(ps, &worker, worker_hdl, deadline)) {
     gpr_tls_set(&g_current_thread_pollset, (intptr_t)ps);
     gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
     GPR_ASSERT(!ps->shutting_down);
@@ -968,14 +950,14 @@
 
        process_epoll_events() returns very quickly: It just queues the work on
        exec_ctx but does not execute it (the actual exectution or more
-       accurately grpc_exec_ctx_flush() happens in end_worker() AFTER selecting
-       a designated poller). So we are not waiting long periods without a
-       designated poller */
+       accurately grpc_core::ExecCtx::Get()->Flush() happens in end_worker()
+       AFTER selecting a designated poller). So we are not waiting long periods
+       without a designated poller */
     if (gpr_atm_acq_load(&g_epoll_set.cursor) ==
         gpr_atm_acq_load(&g_epoll_set.num_events)) {
-      append_error(&error, do_epoll_wait(exec_ctx, ps, deadline), err_desc);
+      append_error(&error, do_epoll_wait(ps, deadline), err_desc);
     }
-    append_error(&error, process_epoll_events(exec_ctx, ps), err_desc);
+    append_error(&error, process_epoll_events(ps), err_desc);
 
     gpr_mu_lock(&ps->mu); /* lock */
 
@@ -983,17 +965,17 @@
   } else {
     gpr_tls_set(&g_current_thread_pollset, (intptr_t)ps);
   }
-  end_worker(exec_ctx, ps, &worker, worker_hdl);
+  end_worker(ps, &worker, worker_hdl);
 
   gpr_tls_set(&g_current_thread_pollset, 0);
   GPR_TIMER_END("pollset_work", 0);
   return error;
 }
 
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_kick(grpc_pollset* pollset,
                                 grpc_pollset_worker* specific_worker) {
   GPR_TIMER_BEGIN("pollset_kick", 0);
-  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  GRPC_STATS_INC_POLLSET_KICK();
   grpc_error* ret_err = GRPC_ERROR_NONE;
   if (grpc_polling_trace.enabled()) {
     gpr_strvec log;
@@ -1026,7 +1008,7 @@
     if (gpr_tls_get(&g_current_thread_pollset) != (intptr_t)pollset) {
       grpc_pollset_worker* root_worker = pollset->root_worker;
       if (root_worker == nullptr) {
-        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER();
         pollset->kicked_without_poller = true;
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. kicked_without_poller");
@@ -1035,14 +1017,14 @@
       }
       grpc_pollset_worker* next_worker = root_worker->next;
       if (root_worker->state == KICKED) {
-        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. already kicked %p", root_worker);
         }
         SET_KICK_STATE(root_worker, KICKED);
         goto done;
       } else if (next_worker->state == KICKED) {
-        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. already kicked %p", next_worker);
         }
@@ -1053,7 +1035,7 @@
                                      // there is no next worker
                  root_worker == (grpc_pollset_worker*)gpr_atm_no_barrier_load(
                                     &g_active_poller)) {
-        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. kicked %p", root_worker);
         }
@@ -1061,7 +1043,7 @@
         ret_err = grpc_wakeup_fd_wakeup(&global_wakeup_fd);
         goto done;
       } else if (next_worker->state == UNKICKED) {
-        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_ERROR, " .. kicked %p", next_worker);
         }
@@ -1079,12 +1061,12 @@
           }
           SET_KICK_STATE(root_worker, KICKED);
           if (root_worker->initialized_cv) {
-            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+            GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
             gpr_cv_signal(&root_worker->cv);
           }
           goto done;
         } else {
-          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+          GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
           if (grpc_polling_trace.enabled()) {
             gpr_log(GPR_ERROR, " .. non-root poller %p (root=%p)", next_worker,
                     root_worker);
@@ -1094,13 +1076,13 @@
           goto done;
         }
       } else {
-        GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
         GPR_ASSERT(next_worker->state == KICKED);
         SET_KICK_STATE(next_worker, KICKED);
         goto done;
       }
     } else {
-      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
+      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD();
       if (grpc_polling_trace.enabled()) {
         gpr_log(GPR_ERROR, " .. kicked while waking up");
       }
@@ -1117,7 +1099,7 @@
     goto done;
   } else if (gpr_tls_get(&g_current_thread_worker) ==
              (intptr_t)specific_worker) {
-    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_ERROR, " .. mark %p kicked", specific_worker);
     }
@@ -1125,7 +1107,7 @@
     goto done;
   } else if (specific_worker ==
              (grpc_pollset_worker*)gpr_atm_no_barrier_load(&g_active_poller)) {
-    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_ERROR, " .. kick active poller");
     }
@@ -1133,7 +1115,7 @@
     ret_err = grpc_wakeup_fd_wakeup(&global_wakeup_fd);
     goto done;
   } else if (specific_worker->initialized_cv) {
-    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_ERROR, " .. kick waiting worker");
     }
@@ -1141,7 +1123,7 @@
     gpr_cv_signal(&specific_worker->cv);
     goto done;
   } else {
-    GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_ERROR, " .. kick non-waiting worker");
     }
@@ -1153,8 +1135,7 @@
   return ret_err;
 }
 
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_fd* fd) {}
+static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {}
 
 /*******************************************************************************
  * Pollset-set Definitions
@@ -1164,27 +1145,20 @@
   return (grpc_pollset_set*)((intptr_t)0xdeafbeef);
 }
 
-static void pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_pollset_set* pss) {}
+static void pollset_set_destroy(grpc_pollset_set* pss) {}
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {}
+static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {}
 
-static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {}
+static void pollset_set_del_fd(grpc_pollset_set* pss, grpc_fd* fd) {}
 
-static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {}
+static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {}
 
-static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {}
+static void pollset_set_del_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {}
 
-static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {}
 
-static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {}
 
 /*******************************************************************************
@@ -1260,7 +1234,7 @@
 const grpc_event_engine_vtable* grpc_init_epoll1_linux(bool explicit_request) {
   gpr_log(GPR_ERROR,
           "Skipping epoll1 becuase GRPC_LINUX_EPOLL is not defined.");
-  return NULL;
+  return nullptr;
 }
 #endif /* defined(GRPC_POSIX_SOCKET) */
 #endif /* !defined(GRPC_LINUX_EPOLL) */
diff --git a/src/core/lib/iomgr/ev_epollex_linux.cc b/src/core/lib/iomgr/ev_epollex_linux.cc
index 62643df..b281715 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.cc
+++ b/src/core/lib/iomgr/ev_epollex_linux.cc
@@ -257,8 +257,7 @@
 
 #ifndef NDEBUG
 #define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
-#define UNREF_BY(ec, fd, n, reason) \
-  unref_by(ec, fd, n, reason, __FILE__, __LINE__)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
 static void ref_by(grpc_fd* fd, int n, const char* reason, const char* file,
                    int line) {
   if (grpc_trace_fd_refcount.enabled()) {
@@ -269,13 +268,13 @@
   }
 #else
 #define REF_BY(fd, n, reason) ref_by(fd, n)
-#define UNREF_BY(ec, fd, n, reason) unref_by(ec, fd, n)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n)
 static void ref_by(grpc_fd* fd, int n) {
 #endif
   GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
 }
 
-static void fd_destroy(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void fd_destroy(void* arg, grpc_error* error) {
   grpc_fd* fd = (grpc_fd*)arg;
   /* Add the fd to the freelist */
   grpc_iomgr_unregister_object(&fd->iomgr_object);
@@ -293,8 +292,8 @@
 }
 
 #ifndef NDEBUG
-static void unref_by(grpc_exec_ctx* exec_ctx, grpc_fd* fd, int n,
-                     const char* reason, const char* file, int line) {
+static void unref_by(grpc_fd* fd, int n, const char* reason, const char* file,
+                     int line) {
   if (grpc_trace_fd_refcount.enabled()) {
     gpr_log(GPR_DEBUG,
             "FD %d %p unref %d %" PRIdPTR " -> %" PRIdPTR " [%s; %s:%d]",
@@ -302,12 +301,11 @@
             gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
   }
 #else
-static void unref_by(grpc_exec_ctx* exec_ctx, grpc_fd* fd, int n) {
+static void unref_by(grpc_fd* fd, int n) {
 #endif
   gpr_atm old = gpr_atm_full_fetch_add(&fd->refst, -n);
   if (old == n) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(fd_destroy, fd, grpc_schedule_on_exec_ctx),
         GRPC_ERROR_NONE);
   } else {
@@ -373,8 +371,7 @@
   return (gpr_atm_acq_load(&fd->refst) & 1) ? ret_fd : -1;
 }
 
-static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                      grpc_closure* on_done, int* release_fd,
+static void fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                       bool already_closed, const char* reason) {
   bool is_fd_closed = already_closed;
 
@@ -399,15 +396,14 @@
      to be alive (and not added to freelist) until the end of this function */
   REF_BY(fd, 1, reason);
 
-  GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(fd->on_done_closure, GRPC_ERROR_NONE);
 
   gpr_mu_unlock(&fd->orphan_mu);
 
-  UNREF_BY(exec_ctx, fd, 2, reason); /* Drop the reference */
+  UNREF_BY(fd, 2, reason); /* Drop the reference */
 }
 
-static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                  grpc_fd* fd) {
+static grpc_pollset* fd_get_read_notifier_pollset(grpc_fd* fd) {
   gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset);
   return (grpc_pollset*)notifier;
 }
@@ -417,22 +413,20 @@
 }
 
 /* Might be called multiple times */
-static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
-  if (fd->read_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why))) {
+static void fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  if (fd->read_closure->SetShutdown(GRPC_ERROR_REF(why))) {
     shutdown(fd->fd, SHUT_RDWR);
-    fd->write_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why));
+    fd->write_closure->SetShutdown(GRPC_ERROR_REF(why));
   }
   GRPC_ERROR_UNREF(why);
 }
 
-static void fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                              grpc_closure* closure) {
-  fd->read_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
+  fd->read_closure->NotifyOn(closure);
 }
 
-static void fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_closure* closure) {
-  fd->write_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
+  fd->write_closure->NotifyOn(closure);
 }
 
 /*******************************************************************************
@@ -556,8 +550,7 @@
 }
 
 /* pollset->mu must be held while calling this function */
-static void pollset_maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
-                                          grpc_pollset* pollset) {
+static void pollset_maybe_finish_shutdown(grpc_pollset* pollset) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "PS:%p (pollable:%p) maybe_finish_shutdown sc=%p (target:!NULL) "
@@ -567,7 +560,7 @@
   }
   if (pollset->shutdown_closure != nullptr && pollset->root_worker == nullptr &&
       pollset->containing_pollset_set_count == 0) {
-    GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(pollset->shutdown_closure, GRPC_ERROR_NONE);
     pollset->shutdown_closure = nullptr;
   }
 }
@@ -575,8 +568,7 @@
 /* pollset->mu must be held before calling this function,
  * pollset->active_pollable->mu & specific_worker->pollable_obj->mu must not be
  * held */
-static grpc_error* kick_one_worker(grpc_exec_ctx* exec_ctx,
-                                   grpc_pollset_worker* specific_worker) {
+static grpc_error* kick_one_worker(grpc_pollset_worker* specific_worker) {
   pollable* p = specific_worker->pollable_obj;
   grpc_core::mu_guard lock(&p->mu);
   GPR_ASSERT(specific_worker != nullptr);
@@ -584,19 +576,19 @@
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_DEBUG, "PS:%p kicked_specific_but_already_kicked", p);
     }
-    GRPC_STATS_INC_POLLSET_KICKED_AGAIN(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICKED_AGAIN();
     return GRPC_ERROR_NONE;
   }
   if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_DEBUG, "PS:%p kicked_specific_but_awake", p);
     }
-    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD();
     specific_worker->kicked = true;
     return GRPC_ERROR_NONE;
   }
   if (specific_worker == p->root_worker) {
-    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_FD();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_DEBUG, "PS:%p kicked_specific_via_wakeup_fd", p);
     }
@@ -605,7 +597,7 @@
     return error;
   }
   if (specific_worker->initialized_cv) {
-    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
+    GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV();
     if (grpc_polling_trace.enabled()) {
       gpr_log(GPR_DEBUG, "PS:%p kicked_specific_via_cv", p);
     }
@@ -618,9 +610,9 @@
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_kick(grpc_pollset* pollset,
                                 grpc_pollset_worker* specific_worker) {
-  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  GRPC_STATS_INC_POLLSET_KICK();
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "PS:%p kick %p tls_pollset=%p tls_worker=%p pollset.root_worker=%p",
@@ -634,7 +626,7 @@
         if (grpc_polling_trace.enabled()) {
           gpr_log(GPR_DEBUG, "PS:%p kicked_any_without_poller", pollset);
         }
-        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER(exec_ctx);
+        GRPC_STATS_INC_POLLSET_KICKED_WITHOUT_POLLER();
         pollset->kicked_without_poller = true;
         return GRPC_ERROR_NONE;
       } else {
@@ -654,29 +646,28 @@
         // so we take our chances and choose the SECOND worker enqueued against
         // the pollset as a worker that's likely to be in cv_wait
         return kick_one_worker(
-            exec_ctx, pollset->root_worker->links[PWLINK_POLLSET].next);
+            pollset->root_worker->links[PWLINK_POLLSET].next);
       }
     } else {
       if (grpc_polling_trace.enabled()) {
         gpr_log(GPR_DEBUG, "PS:%p kicked_any_but_awake", pollset);
       }
-      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD(exec_ctx);
+      GRPC_STATS_INC_POLLSET_KICK_OWN_THREAD();
       return GRPC_ERROR_NONE;
     }
   } else {
-    return kick_one_worker(exec_ctx, specific_worker);
+    return kick_one_worker(specific_worker);
   }
 }
 
-static grpc_error* pollset_kick_all(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset* pollset) {
+static grpc_error* pollset_kick_all(grpc_pollset* pollset) {
   grpc_error* error = GRPC_ERROR_NONE;
   const char* err_desc = "pollset_kick_all";
   grpc_pollset_worker* w = pollset->root_worker;
   if (w != nullptr) {
     do {
-      GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
-      append_error(&error, kick_one_worker(exec_ctx, w), err_desc);
+      GRPC_STATS_INC_POLLSET_KICK();
+      append_error(&error, kick_one_worker(w), err_desc);
       w = w->links[PWLINK_POLLSET].next;
     } while (w != pollset->root_worker);
   }
@@ -689,10 +680,9 @@
   *mu = &pollset->mu;
 }
 
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis millis) {
+static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   if (millis == GRPC_MILLIS_INF_FUTURE) return -1;
-  grpc_millis delta = millis - grpc_exec_ctx_now(exec_ctx);
+  grpc_millis delta = millis - grpc_core::ExecCtx::Get()->Now();
   if (delta > INT_MAX)
     return INT_MAX;
   else if (delta < 0)
@@ -701,9 +691,8 @@
     return (int)delta;
 }
 
-static void fd_become_readable(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_pollset* notifier) {
-  fd->read_closure->SetReady(exec_ctx);
+static void fd_become_readable(grpc_fd* fd, grpc_pollset* notifier) {
+  fd->read_closure->SetReady();
 
   /* Note, it is possible that fd_become_readable might be called twice with
      different 'notifier's when an fd becomes readable and it is in two epoll
@@ -714,9 +703,7 @@
   gpr_atm_rel_store(&fd->read_notifier_pollset, (gpr_atm)notifier);
 }
 
-static void fd_become_writable(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
-  fd->write_closure->SetReady(exec_ctx);
-}
+static void fd_become_writable(grpc_fd* fd) { fd->write_closure->SetReady(); }
 
 static grpc_error* fd_get_or_become_pollable(grpc_fd* fd, pollable** p) {
   gpr_mu_lock(&fd->pollable_mu);
@@ -745,16 +732,14 @@
 }
 
 /* pollset->po.mu lock must be held by the caller before calling this */
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                             grpc_closure* closure) {
+static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_ASSERT(pollset->shutdown_closure == nullptr);
   pollset->shutdown_closure = closure;
-  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(exec_ctx, pollset));
-  pollset_maybe_finish_shutdown(exec_ctx, pollset);
+  GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(pollset));
+  pollset_maybe_finish_shutdown(pollset);
 }
 
-static grpc_error* pollable_process_events(grpc_exec_ctx* exec_ctx,
-                                           grpc_pollset* pollset,
+static grpc_error* pollable_process_events(grpc_pollset* pollset,
                                            pollable* pollable_obj, bool drain) {
   static const char* err_desc = "pollset_process_events";
   grpc_error* error = GRPC_ERROR_NONE;
@@ -784,10 +769,10 @@
                 pollset, fd, cancel, read_ev, write_ev);
       }
       if (read_ev || cancel) {
-        fd_become_readable(exec_ctx, fd, pollset);
+        fd_become_readable(fd, pollset);
       }
       if (write_ev || cancel) {
-        fd_become_writable(exec_ctx, fd);
+        fd_become_writable(fd);
       }
     }
   }
@@ -796,14 +781,13 @@
 }
 
 /* pollset_shutdown is guaranteed to be called before pollset_destroy. */
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void pollset_destroy(grpc_pollset* pollset) {
   POLLABLE_UNREF(pollset->active_pollable, "pollset");
   pollset->active_pollable = nullptr;
 }
 
-static grpc_error* pollable_epoll(grpc_exec_ctx* exec_ctx, pollable* p,
-                                  grpc_millis deadline) {
-  int timeout = poll_deadline_to_millis_timeout(exec_ctx, deadline);
+static grpc_error* pollable_epoll(pollable* p, grpc_millis deadline) {
+  int timeout = poll_deadline_to_millis_timeout(deadline);
 
   if (grpc_polling_trace.enabled()) {
     char* desc = pollable_desc(p);
@@ -816,11 +800,11 @@
   }
   int r;
   do {
-    GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+    GRPC_STATS_INC_SYSCALL_POLL();
     r = epoll_wait(p->epfd, p->events, MAX_EPOLL_EVENTS, timeout);
   } while (r < 0 && errno == EINTR);
   if (timeout != 0) {
-    GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(exec_ctx);
+    GRPC_SCHEDULING_END_BLOCKING_REGION;
   }
 
   if (r < 0) return GRPC_OS_ERROR(errno, "epoll_wait");
@@ -875,8 +859,7 @@
 }
 
 /* Return true if this thread should poll */
-static bool begin_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         grpc_pollset_worker* worker,
+static bool begin_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                          grpc_pollset_worker** worker_hdl,
                          grpc_millis deadline) {
   bool do_poll = (pollset->shutdown_closure == nullptr);
@@ -897,7 +880,7 @@
         worker->pollable_obj->root_worker != worker) {
       gpr_log(GPR_DEBUG, "PS:%p wait %p w=%p for %dms", pollset,
               worker->pollable_obj, worker,
-              poll_deadline_to_millis_timeout(exec_ctx, deadline));
+              poll_deadline_to_millis_timeout(deadline));
     }
     while (do_poll && worker->pollable_obj->root_worker != worker) {
       if (gpr_cv_wait(&worker->cv, &worker->pollable_obj->mu,
@@ -919,7 +902,7 @@
                 worker->pollable_obj, worker);
       }
     }
-    grpc_exec_ctx_invalidate_now(exec_ctx);
+    grpc_core::ExecCtx::Get()->InvalidateNow();
   } else {
     gpr_mu_unlock(&pollset->mu);
   }
@@ -928,8 +911,7 @@
   return do_poll;
 }
 
-static void end_worker(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                       grpc_pollset_worker* worker,
+static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                        grpc_pollset_worker** worker_hdl) {
   gpr_mu_lock(&pollset->mu);
   gpr_mu_lock(&worker->pollable_obj->mu);
@@ -945,7 +927,7 @@
     case WRR_EMPTIED:
       if (pollset->active_pollable != worker->pollable_obj) {
         // pollable no longer being polled: flush events
-        pollable_process_events(exec_ctx, pollset, worker->pollable_obj, true);
+        pollable_process_events(pollset, worker->pollable_obj, true);
       }
       break;
     case WRR_REMOVED:
@@ -955,7 +937,7 @@
   POLLABLE_UNREF(worker->pollable_obj, "pollset_worker");
   if (worker_remove(&pollset->root_worker, worker, PWLINK_POLLSET) ==
       WRR_EMPTIED) {
-    pollset_maybe_finish_shutdown(exec_ctx, pollset);
+    pollset_maybe_finish_shutdown(pollset);
   }
   if (worker->initialized_cv) {
     gpr_cv_destroy(&worker->cv);
@@ -970,7 +952,7 @@
    The function pollset_work() may temporarily release the lock (pollset->po.mu)
    during the course of its execution but it will always re-acquire the lock and
    ensure that it is held by the time the function returns */
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
 #ifdef GRPC_EPOLLEX_CREATE_WORKERS_ON_HEAP
@@ -988,7 +970,7 @@
     gpr_log(GPR_DEBUG,
             "PS:%p work hdl=%p worker=%p now=%" PRIdPTR " deadline=%" PRIdPTR
             " kwp=%d pollable=%p",
-            pollset, worker_hdl, WORKER_PTR, grpc_exec_ctx_now(exec_ctx),
+            pollset, worker_hdl, WORKER_PTR, grpc_core::ExecCtx::Get()->Now(),
             deadline, pollset->kicked_without_poller, pollset->active_pollable);
   }
   static const char* err_desc = "pollset_work";
@@ -996,25 +978,23 @@
   if (pollset->kicked_without_poller) {
     pollset->kicked_without_poller = false;
   } else {
-    if (begin_worker(exec_ctx, pollset, WORKER_PTR, worker_hdl, deadline)) {
+    if (begin_worker(pollset, WORKER_PTR, worker_hdl, deadline)) {
       gpr_tls_set(&g_current_thread_pollset, (intptr_t)pollset);
       gpr_tls_set(&g_current_thread_worker, (intptr_t)WORKER_PTR);
       if (WORKER_PTR->pollable_obj->event_cursor ==
           WORKER_PTR->pollable_obj->event_count) {
-        append_error(
-            &error,
-            pollable_epoll(exec_ctx, WORKER_PTR->pollable_obj, deadline),
-            err_desc);
+        append_error(&error, pollable_epoll(WORKER_PTR->pollable_obj, deadline),
+                     err_desc);
       }
-      append_error(&error,
-                   pollable_process_events(exec_ctx, pollset,
-                                           WORKER_PTR->pollable_obj, false),
-                   err_desc);
-      grpc_exec_ctx_flush(exec_ctx);
+      append_error(
+          &error,
+          pollable_process_events(pollset, WORKER_PTR->pollable_obj, false),
+          err_desc);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_tls_set(&g_current_thread_pollset, 0);
       gpr_tls_set(&g_current_thread_worker, 0);
     }
-    end_worker(exec_ctx, pollset, WORKER_PTR, worker_hdl);
+    end_worker(pollset, WORKER_PTR, worker_hdl);
   }
 #ifdef GRPC_EPOLLEX_CREATE_WORKERS_ON_HEAP
   gpr_free(worker);
@@ -1024,7 +1004,7 @@
 }
 
 static grpc_error* pollset_transition_pollable_from_empty_to_fd_locked(
-    grpc_exec_ctx* exec_ctx, grpc_pollset* pollset, grpc_fd* fd) {
+    grpc_pollset* pollset, grpc_fd* fd) {
   static const char* err_desc = "pollset_transition_pollable_from_empty_to_fd";
   grpc_error* error = GRPC_ERROR_NONE;
   if (grpc_polling_trace.enabled()) {
@@ -1032,7 +1012,7 @@
             "PS:%p add fd %p (%d); transition pollable from empty to fd",
             pollset, fd, fd->fd);
   }
-  append_error(&error, pollset_kick_all(exec_ctx, pollset), err_desc);
+  append_error(&error, pollset_kick_all(pollset), err_desc);
   POLLABLE_UNREF(pollset->active_pollable, "pollset");
   append_error(&error, fd_get_or_become_pollable(fd, &pollset->active_pollable),
                err_desc);
@@ -1040,7 +1020,7 @@
 }
 
 static grpc_error* pollset_transition_pollable_from_fd_to_multi_locked(
-    grpc_exec_ctx* exec_ctx, grpc_pollset* pollset, grpc_fd* and_add_fd) {
+    grpc_pollset* pollset, grpc_fd* and_add_fd) {
   static const char* err_desc = "pollset_transition_pollable_from_fd_to_multi";
   grpc_error* error = GRPC_ERROR_NONE;
   if (grpc_polling_trace.enabled()) {
@@ -1050,7 +1030,7 @@
         pollset, and_add_fd, and_add_fd ? and_add_fd->fd : -1,
         pollset->active_pollable->owner_fd);
   }
-  append_error(&error, pollset_kick_all(exec_ctx, pollset), err_desc);
+  append_error(&error, pollset_kick_all(pollset), err_desc);
   grpc_fd* initial_fd = pollset->active_pollable->owner_fd;
   POLLABLE_UNREF(pollset->active_pollable, "pollset");
   pollset->active_pollable = nullptr;
@@ -1068,27 +1048,25 @@
 }
 
 /* expects pollsets locked, flag whether fd is locked or not */
-static grpc_error* pollset_add_fd_locked(grpc_exec_ctx* exec_ctx,
-                                         grpc_pollset* pollset, grpc_fd* fd) {
+static grpc_error* pollset_add_fd_locked(grpc_pollset* pollset, grpc_fd* fd) {
   grpc_error* error = GRPC_ERROR_NONE;
   pollable* po_at_start =
       POLLABLE_REF(pollset->active_pollable, "pollset_add_fd");
   switch (pollset->active_pollable->type) {
     case PO_EMPTY:
       /* empty pollable --> single fd pollable */
-      error = pollset_transition_pollable_from_empty_to_fd_locked(exec_ctx,
-                                                                  pollset, fd);
+      error = pollset_transition_pollable_from_empty_to_fd_locked(pollset, fd);
       break;
     case PO_FD:
       gpr_mu_lock(&po_at_start->owner_fd->orphan_mu);
       if ((gpr_atm_no_barrier_load(&pollset->active_pollable->owner_fd->refst) &
            1) == 0) {
-        error = pollset_transition_pollable_from_empty_to_fd_locked(
-            exec_ctx, pollset, fd);
+        error =
+            pollset_transition_pollable_from_empty_to_fd_locked(pollset, fd);
       } else {
         /* fd --> multipoller */
-        error = pollset_transition_pollable_from_fd_to_multi_locked(
-            exec_ctx, pollset, fd);
+        error =
+            pollset_transition_pollable_from_fd_to_multi_locked(pollset, fd);
       }
       gpr_mu_unlock(&po_at_start->owner_fd->orphan_mu);
       break;
@@ -1105,8 +1083,7 @@
   return error;
 }
 
-static grpc_error* pollset_as_multipollable_locked(grpc_exec_ctx* exec_ctx,
-                                                   grpc_pollset* pollset,
+static grpc_error* pollset_as_multipollable_locked(grpc_pollset* pollset,
                                                    pollable** pollable_obj) {
   grpc_error* error = GRPC_ERROR_NONE;
   pollable* po_at_start =
@@ -1123,8 +1100,8 @@
         POLLABLE_UNREF(pollset->active_pollable, "pollset");
         error = pollable_create(PO_MULTI, &pollset->active_pollable);
       } else {
-        error = pollset_transition_pollable_from_fd_to_multi_locked(
-            exec_ctx, pollset, nullptr);
+        error = pollset_transition_pollable_from_fd_to_multi_locked(pollset,
+                                                                    nullptr);
       }
       gpr_mu_unlock(&po_at_start->owner_fd->orphan_mu);
       break;
@@ -1142,10 +1119,9 @@
   return error;
 }
 
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_fd* fd) {
+static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
   gpr_mu_lock(&pollset->mu);
-  grpc_error* error = pollset_add_fd_locked(exec_ctx, pollset, fd);
+  grpc_error* error = pollset_add_fd_locked(pollset, fd);
   gpr_mu_unlock(&pollset->mu);
   GRPC_LOG_IF_ERROR("pollset_add_fd", error);
 }
@@ -1171,28 +1147,27 @@
   return pss;
 }
 
-static void pollset_set_unref(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss) {
+static void pollset_set_unref(grpc_pollset_set* pss) {
   if (pss == nullptr) return;
   if (!gpr_unref(&pss->refs)) return;
-  pollset_set_unref(exec_ctx, pss->parent);
+  pollset_set_unref(pss->parent);
   gpr_mu_destroy(&pss->mu);
   for (size_t i = 0; i < pss->pollset_count; i++) {
     gpr_mu_lock(&pss->pollsets[i]->mu);
     if (0 == --pss->pollsets[i]->containing_pollset_set_count) {
-      pollset_maybe_finish_shutdown(exec_ctx, pss->pollsets[i]);
+      pollset_maybe_finish_shutdown(pss->pollsets[i]);
     }
     gpr_mu_unlock(&pss->pollsets[i]->mu);
   }
   for (size_t i = 0; i < pss->fd_count; i++) {
-    UNREF_BY(exec_ctx, pss->fds[i], 2, "pollset_set");
+    UNREF_BY(pss->fds[i], 2, "pollset_set");
   }
   gpr_free(pss->pollsets);
   gpr_free(pss->fds);
   gpr_free(pss);
 }
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {
+static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: add fd %p (%d)", pss, fd, fd->fd);
   }
@@ -1215,8 +1190,7 @@
   GRPC_LOG_IF_ERROR(err_desc, error);
 }
 
-static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {
+static void pollset_set_del_fd(grpc_pollset_set* pss, grpc_fd* fd) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: del fd %p", pss, fd);
   }
@@ -1224,7 +1198,7 @@
   size_t i;
   for (i = 0; i < pss->fd_count; i++) {
     if (pss->fds[i] == fd) {
-      UNREF_BY(exec_ctx, fd, 2, "pollset_set");
+      UNREF_BY(fd, 2, "pollset_set");
       break;
     }
   }
@@ -1236,8 +1210,7 @@
   gpr_mu_unlock(&pss->mu);
 }
 
-static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {
+static void pollset_set_del_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: del pollset %p", pss, ps);
   }
@@ -1256,15 +1229,15 @@
   gpr_mu_unlock(&pss->mu);
   gpr_mu_lock(&ps->mu);
   if (0 == --ps->containing_pollset_set_count) {
-    pollset_maybe_finish_shutdown(exec_ctx, ps);
+    pollset_maybe_finish_shutdown(ps);
   }
   gpr_mu_unlock(&ps->mu);
 }
 
 // add all fds to pollables, and output a new array of unorphaned out_fds
 // assumes pollsets are multipollable
-static grpc_error* add_fds_to_pollsets(grpc_exec_ctx* exec_ctx, grpc_fd** fds,
-                                       size_t fd_count, grpc_pollset** pollsets,
+static grpc_error* add_fds_to_pollsets(grpc_fd** fds, size_t fd_count,
+                                       grpc_pollset** pollsets,
                                        size_t pollset_count,
                                        const char* err_desc, grpc_fd** out_fds,
                                        size_t* out_fd_count) {
@@ -1273,7 +1246,7 @@
     gpr_mu_lock(&fds[i]->orphan_mu);
     if ((gpr_atm_no_barrier_load(&fds[i]->refst) & 1) == 0) {
       gpr_mu_unlock(&fds[i]->orphan_mu);
-      UNREF_BY(exec_ctx, fds[i], 2, "pollset_set");
+      UNREF_BY(fds[i], 2, "pollset_set");
     } else {
       for (size_t j = 0; j < pollset_count; j++) {
         append_error(&error,
@@ -1287,8 +1260,7 @@
   return error;
 }
 
-static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {
+static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: add pollset %p", pss, ps);
   }
@@ -1296,8 +1268,8 @@
   static const char* err_desc = "pollset_set_add_pollset";
   pollable* pollable_obj = nullptr;
   gpr_mu_lock(&ps->mu);
-  if (!GRPC_LOG_IF_ERROR(err_desc, pollset_as_multipollable_locked(
-                                       exec_ctx, ps, &pollable_obj))) {
+  if (!GRPC_LOG_IF_ERROR(err_desc,
+                         pollset_as_multipollable_locked(ps, &pollable_obj))) {
     GPR_ASSERT(pollable_obj == nullptr);
     gpr_mu_unlock(&ps->mu);
     return;
@@ -1308,8 +1280,8 @@
   size_t initial_fd_count = pss->fd_count;
   pss->fd_count = 0;
   append_error(&error,
-               add_fds_to_pollsets(exec_ctx, pss->fds, initial_fd_count, &ps, 1,
-                                   err_desc, pss->fds, &pss->fd_count),
+               add_fds_to_pollsets(pss->fds, initial_fd_count, &ps, 1, err_desc,
+                                   pss->fds, &pss->fd_count),
                err_desc);
   if (pss->pollset_count == pss->pollset_capacity) {
     pss->pollset_capacity = GPR_MAX(pss->pollset_capacity * 2, 8);
@@ -1323,8 +1295,7 @@
   GRPC_LOG_IF_ERROR(err_desc, error);
 }
 
-static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* a,
+static void pollset_set_add_pollset_set(grpc_pollset_set* a,
                                         grpc_pollset_set* b) {
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS: merge (%p, %p)", a, b);
@@ -1373,13 +1344,13 @@
   a->fd_count = 0;
   append_error(
       &error,
-      add_fds_to_pollsets(exec_ctx, a->fds, initial_a_fd_count, b->pollsets,
+      add_fds_to_pollsets(a->fds, initial_a_fd_count, b->pollsets,
                           b->pollset_count, "merge_a2b", a->fds, &a->fd_count),
       err_desc);
   append_error(
       &error,
-      add_fds_to_pollsets(exec_ctx, b->fds, b->fd_count, a->pollsets,
-                          a->pollset_count, "merge_b2a", a->fds, &a->fd_count),
+      add_fds_to_pollsets(b->fds, b->fd_count, a->pollsets, a->pollset_count,
+                          "merge_b2a", a->fds, &a->fd_count),
       err_desc);
   if (a->pollset_capacity < a->pollset_count + b->pollset_count) {
     a->pollset_capacity =
@@ -1401,8 +1372,7 @@
   gpr_mu_unlock(&b->mu);
 }
 
-static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {}
 
 /*******************************************************************************
@@ -1481,7 +1451,7 @@
     bool explicitly_requested) {
   gpr_log(GPR_ERROR,
           "Skipping epollex becuase GRPC_LINUX_EPOLL is not defined.");
-  return NULL;
+  return nullptr;
 }
 #endif /* defined(GRPC_POSIX_SOCKET) */
 
diff --git a/src/core/lib/iomgr/ev_epollsig_linux.cc b/src/core/lib/iomgr/ev_epollsig_linux.cc
index 12c8483..7a8962f 100644
--- a/src/core/lib/iomgr/ev_epollsig_linux.cc
+++ b/src/core/lib/iomgr/ev_epollsig_linux.cc
@@ -165,13 +165,12 @@
 #ifndef NDEBUG
 
 #define PI_ADD_REF(p, r) pi_add_ref_dbg((p), (r), __FILE__, __LINE__)
-#define PI_UNREF(exec_ctx, p, r) \
-  pi_unref_dbg((exec_ctx), (p), (r), __FILE__, __LINE__)
+#define PI_UNREF(p, r) pi_unref_dbg((p), (r), __FILE__, __LINE__)
 
 #else
 
 #define PI_ADD_REF(p, r) pi_add_ref((p))
-#define PI_UNREF(exec_ctx, p, r) pi_unref((exec_ctx), (p))
+#define PI_UNREF(p, r) pi_unref((p))
 
 #endif
 
@@ -270,7 +269,7 @@
 static __thread polling_island* g_current_thread_polling_island;
 
 /* Forward declaration */
-static void polling_island_delete(grpc_exec_ctx* exec_ctx, polling_island* pi);
+static void polling_island_delete(polling_island* pi);
 
 #ifdef GRPC_TSAN
 /* Currently TSAN may incorrectly flag data races between epoll_ctl and
@@ -284,7 +283,7 @@
 #endif /* defined(GRPC_TSAN) */
 
 static void pi_add_ref(polling_island* pi);
-static void pi_unref(grpc_exec_ctx* exec_ctx, polling_island* pi);
+static void pi_unref(polling_island* pi);
 
 #ifndef NDEBUG
 static void pi_add_ref_dbg(polling_island* pi, const char* reason,
@@ -299,8 +298,8 @@
   pi_add_ref(pi);
 }
 
-static void pi_unref_dbg(grpc_exec_ctx* exec_ctx, polling_island* pi,
-                         const char* reason, const char* file, int line) {
+static void pi_unref_dbg(polling_island* pi, const char* reason,
+                         const char* file, int line) {
   if (grpc_polling_trace.enabled()) {
     gpr_atm old_cnt = gpr_atm_acq_load(&pi->ref_count);
     gpr_log(GPR_DEBUG,
@@ -308,7 +307,7 @@
             " (%s) - (%s, %d)",
             pi, old_cnt, (old_cnt - 1), reason, file, line);
   }
-  pi_unref(exec_ctx, pi);
+  pi_unref(pi);
 }
 #endif
 
@@ -316,7 +315,7 @@
   gpr_atm_no_barrier_fetch_add(&pi->ref_count, 1);
 }
 
-static void pi_unref(grpc_exec_ctx* exec_ctx, polling_island* pi) {
+static void pi_unref(polling_island* pi) {
   /* If ref count went to zero, delete the polling island.
      Note that this deletion not be done under a lock. Once the ref count goes
      to zero, we are guaranteed that no one else holds a reference to the
@@ -327,9 +326,9 @@
    */
   if (1 == gpr_atm_full_fetch_add(&pi->ref_count, -1)) {
     polling_island* next = (polling_island*)gpr_atm_acq_load(&pi->merged_to);
-    polling_island_delete(exec_ctx, pi);
+    polling_island_delete(pi);
     if (next != nullptr) {
-      PI_UNREF(exec_ctx, next, "pi_delete"); /* Recursive call */
+      PI_UNREF(next, "pi_delete"); /* Recursive call */
     }
   }
 }
@@ -465,8 +464,7 @@
 }
 
 /* Might return NULL in case of an error */
-static polling_island* polling_island_create(grpc_exec_ctx* exec_ctx,
-                                             grpc_fd* initial_fd,
+static polling_island* polling_island_create(grpc_fd* initial_fd,
                                              grpc_error** error) {
   polling_island* pi = nullptr;
   const char* err_desc = "polling_island_create";
@@ -482,7 +480,7 @@
 
   gpr_atm_rel_store(&pi->ref_count, 0);
   gpr_atm_rel_store(&pi->poller_count, 0);
-  gpr_atm_rel_store(&pi->merged_to, (gpr_atm)NULL);
+  gpr_atm_rel_store(&pi->merged_to, (gpr_atm) nullptr);
 
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
@@ -497,13 +495,13 @@
 
 done:
   if (*error != GRPC_ERROR_NONE) {
-    polling_island_delete(exec_ctx, pi);
+    polling_island_delete(pi);
     pi = nullptr;
   }
   return pi;
 }
 
-static void polling_island_delete(grpc_exec_ctx* exec_ctx, polling_island* pi) {
+static void polling_island_delete(polling_island* pi) {
   GPR_ASSERT(pi->fd_cnt == 0);
 
   if (pi->epoll_fd >= 0) {
@@ -862,8 +860,7 @@
   return ret_fd;
 }
 
-static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                      grpc_closure* on_done, int* release_fd,
+static void fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                       bool already_closed, const char* reason) {
   grpc_error* error = GRPC_ERROR_NONE;
   polling_island* unref_pi = nullptr;
@@ -902,7 +899,7 @@
 
   fd->orphaned = true;
 
-  GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(fd->on_done_closure, GRPC_ERROR_REF(error));
 
   gpr_mu_unlock(&fd->po.mu);
   UNREF_BY(fd, 2, reason); /* Drop the reference */
@@ -911,7 +908,7 @@
        The polling island owns a workqueue which owns an fd, and unreffing
        inside the lock can cause an eventual lock loop that makes TSAN very
        unhappy. */
-    PI_UNREF(exec_ctx, unref_pi, "fd_orphan");
+    PI_UNREF(unref_pi, "fd_orphan");
   }
   if (error != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(error);
@@ -920,8 +917,7 @@
   GRPC_ERROR_UNREF(error);
 }
 
-static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                  grpc_fd* fd) {
+static grpc_pollset* fd_get_read_notifier_pollset(grpc_fd* fd) {
   gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset);
   return (grpc_pollset*)notifier;
 }
@@ -931,22 +927,20 @@
 }
 
 /* Might be called multiple times */
-static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
-  if (fd->read_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why))) {
+static void fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  if (fd->read_closure->SetShutdown(GRPC_ERROR_REF(why))) {
     shutdown(fd->fd, SHUT_RDWR);
-    fd->write_closure->SetShutdown(exec_ctx, GRPC_ERROR_REF(why));
+    fd->write_closure->SetShutdown(GRPC_ERROR_REF(why));
   }
   GRPC_ERROR_UNREF(why);
 }
 
-static void fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                              grpc_closure* closure) {
-  fd->read_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
+  fd->read_closure->NotifyOn(closure);
 }
 
-static void fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_closure* closure) {
-  fd->write_closure->NotifyOn(exec_ctx, closure);
+static void fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
+  fd->write_closure->NotifyOn(closure);
 }
 
 /*******************************************************************************
@@ -1028,11 +1022,11 @@
 }
 
 /* p->mu must be held before calling this function */
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+static grpc_error* pollset_kick(grpc_pollset* p,
                                 grpc_pollset_worker* specific_worker) {
   GPR_TIMER_BEGIN("pollset_kick", 0);
   grpc_error* error = GRPC_ERROR_NONE;
-  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  GRPC_STATS_INC_POLLSET_KICK();
   const char* err_desc = "Kick Failure";
   grpc_pollset_worker* worker = specific_worker;
   if (worker != nullptr) {
@@ -1096,10 +1090,9 @@
   pollset->shutdown_done = nullptr;
 }
 
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis millis) {
+static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   if (millis == GRPC_MILLIS_INF_FUTURE) return -1;
-  grpc_millis delta = millis - grpc_exec_ctx_now(exec_ctx);
+  grpc_millis delta = millis - grpc_core::ExecCtx::Get()->Now();
   if (delta > INT_MAX)
     return INT_MAX;
   else if (delta < 0)
@@ -1108,9 +1101,8 @@
     return (int)delta;
 }
 
-static void fd_become_readable(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_pollset* notifier) {
-  fd->read_closure->SetReady(exec_ctx);
+static void fd_become_readable(grpc_fd* fd, grpc_pollset* notifier) {
+  fd->read_closure->SetReady();
 
   /* Note, it is possible that fd_become_readable might be called twice with
      different 'notifier's when an fd becomes readable and it is in two epoll
@@ -1121,39 +1113,34 @@
   gpr_atm_rel_store(&fd->read_notifier_pollset, (gpr_atm)notifier);
 }
 
-static void fd_become_writable(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
-  fd->write_closure->SetReady(exec_ctx);
-}
+static void fd_become_writable(grpc_fd* fd) { fd->write_closure->SetReady(); }
 
-static void pollset_release_polling_island(grpc_exec_ctx* exec_ctx,
-                                           grpc_pollset* ps,
+static void pollset_release_polling_island(grpc_pollset* ps,
                                            const char* reason) {
   if (ps->po.pi != nullptr) {
-    PI_UNREF(exec_ctx, ps->po.pi, reason);
+    PI_UNREF(ps->po.pi, reason);
   }
   ps->po.pi = nullptr;
 }
 
-static void finish_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_pollset* pollset) {
+static void finish_shutdown_locked(grpc_pollset* pollset) {
   /* The pollset cannot have any workers if we are at this stage */
   GPR_ASSERT(!pollset_has_workers(pollset));
 
   pollset->finish_shutdown_called = true;
 
   /* Release the ref and set pollset->po.pi to NULL */
-  pollset_release_polling_island(exec_ctx, pollset, "ps_shutdown");
-  GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE);
+  pollset_release_polling_island(pollset, "ps_shutdown");
+  GRPC_CLOSURE_SCHED(pollset->shutdown_done, GRPC_ERROR_NONE);
 }
 
 /* pollset->po.mu lock must be held by the caller before calling this */
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                             grpc_closure* closure) {
+static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_TIMER_BEGIN("pollset_shutdown", 0);
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutting_down = true;
   pollset->shutdown_done = closure;
-  pollset_kick(exec_ctx, pollset, GRPC_POLLSET_KICK_BROADCAST);
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
 
   /* If the pollset has any workers, we cannot call finish_shutdown_locked()
      because it would release the underlying polling island. In such a case, we
@@ -1161,7 +1148,7 @@
   if (!pollset_has_workers(pollset)) {
     GPR_ASSERT(!pollset->finish_shutdown_called);
     GPR_TIMER_MARK("pollset_shutdown.finish_shutdown_locked", 0);
-    finish_shutdown_locked(exec_ctx, pollset);
+    finish_shutdown_locked(pollset);
   }
   GPR_TIMER_END("pollset_shutdown", 0);
 }
@@ -1169,15 +1156,14 @@
 /* pollset_shutdown is guaranteed to be called before pollset_destroy. So other
  * than destroying the mutexes, there is nothing special that needs to be done
  * here */
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void pollset_destroy(grpc_pollset* pollset) {
   GPR_ASSERT(!pollset_has_workers(pollset));
   gpr_mu_destroy(&pollset->po.mu);
 }
 
 #define GRPC_EPOLL_MAX_EVENTS 100
 /* Note: sig_mask contains the signal mask to use *during* epoll_wait() */
-static void pollset_work_and_unlock(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset* pollset,
+static void pollset_work_and_unlock(grpc_pollset* pollset,
                                     grpc_pollset_worker* worker, int timeout_ms,
                                     sigset_t* sig_mask, grpc_error** error) {
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
@@ -1199,7 +1185,7 @@
      this function (i.e pollset_work_and_unlock()) is called */
 
   if (pollset->po.pi == nullptr) {
-    pollset->po.pi = polling_island_create(exec_ctx, nullptr, error);
+    pollset->po.pi = polling_island_create(nullptr, error);
     if (pollset->po.pi == nullptr) {
       GPR_TIMER_END("pollset_work_and_unlock", 0);
       return; /* Fatal error. We cannot continue */
@@ -1219,7 +1205,7 @@
     /* Always do PI_ADD_REF before PI_UNREF because PI_UNREF may cause the
        polling island to be deleted */
     PI_ADD_REF(pi, "ps");
-    PI_UNREF(exec_ctx, pollset->po.pi, "ps");
+    PI_UNREF(pollset->po.pi, "ps");
     pollset->po.pi = pi;
   }
 
@@ -1233,10 +1219,10 @@
   g_current_thread_polling_island = pi;
 
   GRPC_SCHEDULING_START_BLOCKING_REGION;
-  GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+  GRPC_STATS_INC_SYSCALL_POLL();
   ep_rv =
       epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms, sig_mask);
-  GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(exec_ctx);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
   if (ep_rv < 0) {
     if (errno != EINTR) {
       gpr_asprintf(&err_msg,
@@ -1274,10 +1260,10 @@
       int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
       int write_ev = ep_ev[i].events & EPOLLOUT;
       if (read_ev || cancel) {
-        fd_become_readable(exec_ctx, fd, pollset);
+        fd_become_readable(fd, pollset);
       }
       if (write_ev || cancel) {
-        fd_become_writable(exec_ctx, fd);
+        fd_become_writable(fd);
       }
     }
   }
@@ -1292,7 +1278,7 @@
      that we got before releasing the polling island lock). This is because
      pollset->po.pi pointer might get udpated in other parts of the
      code when there is an island merge while we are doing epoll_wait() above */
-  PI_UNREF(exec_ctx, pi, "ps_work");
+  PI_UNREF(pi, "ps_work");
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
@@ -1301,12 +1287,12 @@
    The function pollset_work() may temporarily release the lock (pollset->po.mu)
    during the course of its execution but it will always re-acquire the lock and
    ensure that it is held by the time the function returns */
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
   GPR_TIMER_BEGIN("pollset_work", 0);
   grpc_error* error = GRPC_ERROR_NONE;
-  int timeout_ms = poll_deadline_to_millis_timeout(exec_ctx, deadline);
+  int timeout_ms = poll_deadline_to_millis_timeout(deadline);
 
   sigset_t new_mask;
 
@@ -1364,9 +1350,9 @@
 
     push_front_worker(pollset, &worker); /* Add worker to pollset */
 
-    pollset_work_and_unlock(exec_ctx, pollset, &worker, timeout_ms,
-                            &g_orig_sigmask, &error);
-    grpc_exec_ctx_flush(exec_ctx);
+    pollset_work_and_unlock(pollset, &worker, timeout_ms, &g_orig_sigmask,
+                            &error);
+    grpc_core::ExecCtx::Get()->Flush();
 
     gpr_mu_lock(&pollset->po.mu);
 
@@ -1386,10 +1372,10 @@
   if (pollset->shutting_down && !pollset_has_workers(pollset) &&
       !pollset->finish_shutdown_called) {
     GPR_TIMER_MARK("pollset_work.finish_shutdown_locked", 0);
-    finish_shutdown_locked(exec_ctx, pollset);
+    finish_shutdown_locked(pollset);
 
     gpr_mu_unlock(&pollset->po.mu);
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(&pollset->po.mu);
   }
 
@@ -1404,9 +1390,8 @@
   return error;
 }
 
-static void add_poll_object(grpc_exec_ctx* exec_ctx, poll_obj* bag,
-                            poll_obj_type bag_type, poll_obj* item,
-                            poll_obj_type item_type) {
+static void add_poll_object(poll_obj* bag, poll_obj_type bag_type,
+                            poll_obj* item, poll_obj_type item_type) {
   GPR_TIMER_BEGIN("add_poll_object", 0);
 
 #ifndef NDEBUG
@@ -1456,7 +1441,7 @@
            keeping TSAN happy outweigh any performance advantage we might have
            by keeping the lock held. */
         gpr_mu_unlock(&item->mu);
-        pi_new = polling_island_create(exec_ctx, FD_FROM_PO(item), &error);
+        pi_new = polling_island_create(FD_FROM_PO(item), &error);
         gpr_mu_lock(&item->mu);
 
         /* Need to reverify any assumptions made between the initial lock and
@@ -1475,11 +1460,11 @@
           /* Ref and unref so that the polling island gets deleted during unref
            */
           PI_ADD_REF(pi_new, "dance_of_destruction");
-          PI_UNREF(exec_ctx, pi_new, "dance_of_destruction");
+          PI_UNREF(pi_new, "dance_of_destruction");
           goto retry;
         }
       } else {
-        pi_new = polling_island_create(exec_ctx, nullptr, &error);
+        pi_new = polling_island_create(nullptr, &error);
       }
 
       GRPC_POLLING_TRACE(
@@ -1533,7 +1518,7 @@
   if (item->pi != pi_new) {
     PI_ADD_REF(pi_new, poll_obj_string(item_type));
     if (item->pi != nullptr) {
-      PI_UNREF(exec_ctx, item->pi, poll_obj_string(item_type));
+      PI_UNREF(item->pi, poll_obj_string(item_type));
     }
     item->pi = pi_new;
   }
@@ -1541,7 +1526,7 @@
   if (bag->pi != pi_new) {
     PI_ADD_REF(pi_new, poll_obj_string(bag_type));
     if (bag->pi != nullptr) {
-      PI_UNREF(exec_ctx, bag->pi, poll_obj_string(bag_type));
+      PI_UNREF(bag->pi, poll_obj_string(bag_type));
     }
     bag->pi = pi_new;
   }
@@ -1553,10 +1538,8 @@
   GPR_TIMER_END("add_poll_object", 0);
 }
 
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_fd* fd) {
-  add_poll_object(exec_ctx, &pollset->po, POLL_OBJ_POLLSET, &fd->po,
-                  POLL_OBJ_FD);
+static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
+  add_poll_object(&pollset->po, POLL_OBJ_POLLSET, &fd->po, POLL_OBJ_FD);
 }
 
 /*******************************************************************************
@@ -1573,48 +1556,39 @@
   return pss;
 }
 
-static void pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_pollset_set* pss) {
+static void pollset_set_destroy(grpc_pollset_set* pss) {
   gpr_mu_destroy(&pss->po.mu);
 
   if (pss->po.pi != nullptr) {
-    PI_UNREF(exec_ctx, pss->po.pi, "pss_destroy");
+    PI_UNREF(pss->po.pi, "pss_destroy");
   }
 
   gpr_free(pss);
 }
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {
-  add_poll_object(exec_ctx, &pss->po, POLL_OBJ_POLLSET_SET, &fd->po,
-                  POLL_OBJ_FD);
+static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {
+  add_poll_object(&pss->po, POLL_OBJ_POLLSET_SET, &fd->po, POLL_OBJ_FD);
 }
 
-static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx, grpc_pollset_set* pss,
-                               grpc_fd* fd) {
+static void pollset_set_del_fd(grpc_pollset_set* pss, grpc_fd* fd) {
   /* Nothing to do */
 }
 
-static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {
-  add_poll_object(exec_ctx, &pss->po, POLL_OBJ_POLLSET_SET, &ps->po,
-                  POLL_OBJ_POLLSET);
+static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
+  add_poll_object(&pss->po, POLL_OBJ_POLLSET_SET, &ps->po, POLL_OBJ_POLLSET);
 }
 
-static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pss, grpc_pollset* ps) {
+static void pollset_set_del_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
   /* Nothing to do */
 }
 
-static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {
-  add_poll_object(exec_ctx, &bag->po, POLL_OBJ_POLLSET_SET, &item->po,
+  add_poll_object(&bag->po, POLL_OBJ_POLLSET_SET, &item->po,
                   POLL_OBJ_POLLSET_SET);
 }
 
-static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {
   /* Nothing to do */
 }
@@ -1760,7 +1734,7 @@
     bool explicit_request) {
   gpr_log(GPR_ERROR,
           "Skipping epollsig becuase GRPC_LINUX_EPOLL is not defined.");
-  return NULL;
+  return nullptr;
 }
 #endif /* defined(GRPC_POSIX_SOCKET) */
 
diff --git a/src/core/lib/iomgr/ev_poll_posix.cc b/src/core/lib/iomgr/ev_poll_posix.cc
index 43a63c5..53de94f 100644
--- a/src/core/lib/iomgr/ev_poll_posix.cc
+++ b/src/core/lib/iomgr/ev_poll_posix.cc
@@ -128,8 +128,7 @@
    MUST NOT be called with a pollset lock taken
    if got_read or got_write are 1, also does the become_{readable,writable} as
    appropriate. */
-static void fd_end_poll(grpc_exec_ctx* exec_ctx, grpc_fd_watcher* rec,
-                        int got_read, int got_write,
+static void fd_end_poll(grpc_fd_watcher* rec, int got_read, int got_write,
                         grpc_pollset* read_notifier_pollset);
 
 /* Return 1 if this fd is orphaned, 0 otherwise */
@@ -186,11 +185,9 @@
 };
 
 /* Add an fd to a pollset */
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           struct grpc_fd* fd);
+static void pollset_add_fd(grpc_pollset* pollset, struct grpc_fd* fd);
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
-                               grpc_pollset_set* pollset_set, grpc_fd* fd);
+static void pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd);
 
 /* Convert a timespec to milliseconds:
    - very small or negative poll times are clamped to zero to do a
@@ -199,8 +196,7 @@
    - longer than a millisecond polls are rounded up to the next nearest
      millisecond to avoid spinning
    - infinite timeouts are converted to -1 */
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis deadline);
+static int poll_deadline_to_millis_timeout(grpc_millis deadline);
 
 /* Allow kick to wakeup the currently polling worker */
 #define GRPC_POLLSET_CAN_KICK_SELF 1
@@ -208,7 +204,7 @@
 #define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
 /* As per pollset_kick, with an extended set of flags (defined above)
    -- mostly for fd_posix's use. */
-static grpc_error* pollset_kick_ext(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+static grpc_error* pollset_kick_ext(grpc_pollset* p,
                                     grpc_pollset_worker* specific_worker,
                                     uint32_t flags) GRPC_MUST_USE_RESULT;
 
@@ -353,8 +349,7 @@
 }
 
 /* Return the read-notifier pollset */
-static grpc_pollset* fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                  grpc_fd* fd) {
+static grpc_pollset* fd_get_read_notifier_pollset(grpc_fd* fd) {
   grpc_pollset* notifier = nullptr;
 
   gpr_mu_lock(&fd->mu);
@@ -364,39 +359,36 @@
   return notifier;
 }
 
-static grpc_error* pollset_kick_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_fd_watcher* watcher) {
+static grpc_error* pollset_kick_locked(grpc_fd_watcher* watcher) {
   gpr_mu_lock(&watcher->pollset->mu);
   GPR_ASSERT(watcher->worker);
-  grpc_error* err =
-      pollset_kick_ext(exec_ctx, watcher->pollset, watcher->worker,
-                       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
+  grpc_error* err = pollset_kick_ext(watcher->pollset, watcher->worker,
+                                     GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
   gpr_mu_unlock(&watcher->pollset->mu);
   return err;
 }
 
-static void maybe_wake_one_watcher_locked(grpc_exec_ctx* exec_ctx,
-                                          grpc_fd* fd) {
+static void maybe_wake_one_watcher_locked(grpc_fd* fd) {
   if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
-    pollset_kick_locked(exec_ctx, fd->inactive_watcher_root.next);
+    pollset_kick_locked(fd->inactive_watcher_root.next);
   } else if (fd->read_watcher) {
-    pollset_kick_locked(exec_ctx, fd->read_watcher);
+    pollset_kick_locked(fd->read_watcher);
   } else if (fd->write_watcher) {
-    pollset_kick_locked(exec_ctx, fd->write_watcher);
+    pollset_kick_locked(fd->write_watcher);
   }
 }
 
-static void wake_all_watchers_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
+static void wake_all_watchers_locked(grpc_fd* fd) {
   grpc_fd_watcher* watcher;
   for (watcher = fd->inactive_watcher_root.next;
        watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
-    pollset_kick_locked(exec_ctx, watcher);
+    pollset_kick_locked(watcher);
   }
   if (fd->read_watcher) {
-    pollset_kick_locked(exec_ctx, fd->read_watcher);
+    pollset_kick_locked(fd->read_watcher);
   }
   if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
-    pollset_kick_locked(exec_ctx, fd->write_watcher);
+    pollset_kick_locked(fd->write_watcher);
   }
 }
 
@@ -405,12 +397,12 @@
          fd->inactive_watcher_root.next != &fd->inactive_watcher_root;
 }
 
-static void close_fd_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd) {
+static void close_fd_locked(grpc_fd* fd) {
   fd->closed = 1;
   if (!fd->released) {
     close(fd->fd);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(fd->on_done_closure, GRPC_ERROR_NONE);
 }
 
 static int fd_wrapped_fd(grpc_fd* fd) {
@@ -421,8 +413,7 @@
   }
 }
 
-static void fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                      grpc_closure* on_done, int* release_fd,
+static void fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                       bool already_closed, const char* reason) {
   fd->on_done_closure = on_done;
   fd->released = release_fd != nullptr;
@@ -435,9 +426,9 @@
   gpr_mu_lock(&fd->mu);
   REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
   if (!has_watchers(fd)) {
-    close_fd_locked(exec_ctx, fd);
+    close_fd_locked(fd);
   } else {
-    wake_all_watchers_locked(exec_ctx, fd);
+    wake_all_watchers_locked(fd);
   }
   gpr_mu_unlock(&fd->mu);
   UNREF_BY(fd, 2, reason); /* drop the reference */
@@ -469,10 +460,10 @@
   }
 }
 
-static void notify_on_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                             grpc_closure** st, grpc_closure* closure) {
+static void notify_on_locked(grpc_fd* fd, grpc_closure** st,
+                             grpc_closure* closure) {
   if (fd->shutdown) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure,
+    GRPC_CLOSURE_SCHED(closure,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING("FD shutdown"));
   } else if (*st == CLOSURE_NOT_READY) {
     /* not ready ==> switch to a waiting state by setting the closure */
@@ -480,8 +471,8 @@
   } else if (*st == CLOSURE_READY) {
     /* already ready ==> queue the closure to run immediately */
     *st = CLOSURE_NOT_READY;
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, fd_shutdown_error(fd));
-    maybe_wake_one_watcher_locked(exec_ctx, fd);
+    GRPC_CLOSURE_SCHED(closure, fd_shutdown_error(fd));
+    maybe_wake_one_watcher_locked(fd);
   } else {
     /* upcallptr was set to a different closure.  This is an error! */
     gpr_log(GPR_ERROR,
@@ -492,8 +483,7 @@
 }
 
 /* returns 1 if state becomes not ready */
-static int set_ready_locked(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                            grpc_closure** st) {
+static int set_ready_locked(grpc_fd* fd, grpc_closure** st) {
   if (*st == CLOSURE_READY) {
     /* duplicate ready ==> ignore */
     return 0;
@@ -503,18 +493,18 @@
     return 0;
   } else {
     /* waiting ==> queue closure */
-    GRPC_CLOSURE_SCHED(exec_ctx, *st, fd_shutdown_error(fd));
+    GRPC_CLOSURE_SCHED(*st, fd_shutdown_error(fd));
     *st = CLOSURE_NOT_READY;
     return 1;
   }
 }
 
 static void set_read_notifier_pollset_locked(
-    grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_pollset* read_notifier_pollset) {
+    grpc_fd* fd, grpc_pollset* read_notifier_pollset) {
   fd->read_notifier_pollset = read_notifier_pollset;
 }
 
-static void fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
+static void fd_shutdown(grpc_fd* fd, grpc_error* why) {
   gpr_mu_lock(&fd->mu);
   /* only shutdown once */
   if (!fd->shutdown) {
@@ -522,8 +512,8 @@
     fd->shutdown_error = why;
     /* signal read/write closed to OS so that future operations fail */
     shutdown(fd->fd, SHUT_RDWR);
-    set_ready_locked(exec_ctx, fd, &fd->read_closure);
-    set_ready_locked(exec_ctx, fd, &fd->write_closure);
+    set_ready_locked(fd, &fd->read_closure);
+    set_ready_locked(fd, &fd->write_closure);
   } else {
     GRPC_ERROR_UNREF(why);
   }
@@ -537,17 +527,15 @@
   return r;
 }
 
-static void fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                              grpc_closure* closure) {
+static void fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
   gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
+  notify_on_locked(fd, &fd->read_closure, closure);
   gpr_mu_unlock(&fd->mu);
 }
 
-static void fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               grpc_closure* closure) {
+static void fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
   gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
+  notify_on_locked(fd, &fd->write_closure, closure);
   gpr_mu_unlock(&fd->mu);
 }
 
@@ -602,8 +590,7 @@
   return mask;
 }
 
-static void fd_end_poll(grpc_exec_ctx* exec_ctx, grpc_fd_watcher* watcher,
-                        int got_read, int got_write,
+static void fd_end_poll(grpc_fd_watcher* watcher, int got_read, int got_write,
                         grpc_pollset* read_notifier_pollset) {
   int was_polling = 0;
   int kick = 0;
@@ -637,23 +624,23 @@
     watcher->prev->next = watcher->next;
   }
   if (got_read) {
-    if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
+    if (set_ready_locked(fd, &fd->read_closure)) {
       kick = 1;
     }
     if (read_notifier_pollset != nullptr) {
-      set_read_notifier_pollset_locked(exec_ctx, fd, read_notifier_pollset);
+      set_read_notifier_pollset_locked(fd, read_notifier_pollset);
     }
   }
   if (got_write) {
-    if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
+    if (set_ready_locked(fd, &fd->write_closure)) {
       kick = 1;
     }
   }
   if (kick) {
-    maybe_wake_one_watcher_locked(exec_ctx, fd);
+    maybe_wake_one_watcher_locked(fd);
   }
   if (fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
-    close_fd_locked(exec_ctx, fd);
+    close_fd_locked(fd);
   }
   gpr_mu_unlock(&fd->mu);
 
@@ -714,12 +701,12 @@
   *composite = grpc_error_add_child(*composite, error);
 }
 
-static grpc_error* pollset_kick_ext(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+static grpc_error* pollset_kick_ext(grpc_pollset* p,
                                     grpc_pollset_worker* specific_worker,
                                     uint32_t flags) {
   GPR_TIMER_BEGIN("pollset_kick_ext", 0);
   grpc_error* error = GRPC_ERROR_NONE;
-  GRPC_STATS_INC_POLLSET_KICK(exec_ctx);
+  GRPC_STATS_INC_POLLSET_KICK();
 
   /* pollset->mu already held */
   if (specific_worker != nullptr) {
@@ -785,9 +772,9 @@
   return error;
 }
 
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+static grpc_error* pollset_kick(grpc_pollset* p,
                                 grpc_pollset_worker* specific_worker) {
-  return pollset_kick_ext(exec_ctx, p, specific_worker, 0);
+  return pollset_kick_ext(p, specific_worker, 0);
 }
 
 /* global state management */
@@ -821,7 +808,7 @@
   pollset->pollset_set_count = 0;
 }
 
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void pollset_destroy(grpc_pollset* pollset) {
   GPR_ASSERT(!pollset_has_workers(pollset));
   GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
   while (pollset->local_wakeup_cache) {
@@ -834,8 +821,7 @@
   gpr_mu_destroy(&pollset->mu);
 }
 
-static void pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_fd* fd) {
+static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
   gpr_mu_lock(&pollset->mu);
   size_t i;
   /* TODO(ctiller): this is O(num_fds^2); maybe switch to a hash set here */
@@ -850,19 +836,19 @@
   }
   pollset->fds[pollset->fd_count++] = fd;
   GRPC_FD_REF(fd, "multipoller");
-  pollset_kick(exec_ctx, pollset, nullptr);
+  pollset_kick(pollset, nullptr);
 exit:
   gpr_mu_unlock(&pollset->mu);
 }
 
-static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+static void finish_shutdown(grpc_pollset* pollset) {
   GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
   size_t i;
   for (i = 0; i < pollset->fd_count; i++) {
     GRPC_FD_UNREF(pollset->fds[i], "multipoller");
   }
   pollset->fd_count = 0;
-  GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(pollset->shutdown_done, GRPC_ERROR_NONE);
 }
 
 static void work_combine_error(grpc_error** composite, grpc_error* error) {
@@ -873,7 +859,7 @@
   *composite = grpc_error_add_child(*composite, error);
 }
 
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
   grpc_pollset_worker worker;
@@ -912,7 +898,7 @@
   if (!pollset_has_workers(pollset) &&
       !grpc_closure_list_empty(pollset->idle_jobs)) {
     GPR_TIMER_MARK("pollset_work.idle_jobs", 0);
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pollset->idle_jobs);
+    GRPC_CLOSURE_LIST_SCHED(&pollset->idle_jobs);
     goto done;
   }
   /* If we're shutting down then we don't execute any extended work */
@@ -944,7 +930,7 @@
       grpc_fd_watcher* watchers;
       struct pollfd* pfds;
 
-      timeout = poll_deadline_to_millis_timeout(exec_ctx, deadline);
+      timeout = poll_deadline_to_millis_timeout(deadline);
 
       if (pollset->fd_count + 2 <= inline_elements) {
         pfds = pollfd_space;
@@ -988,9 +974,9 @@
       /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
          even going into the blocking annotation if possible */
       GRPC_SCHEDULING_START_BLOCKING_REGION;
-      GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+      GRPC_STATS_INC_SYSCALL_POLL();
       r = grpc_poll_function(pfds, pfd_count, timeout);
-      GRPC_SCHEDULING_END_BLOCKING_REGION_WITH_EXEC_CTX(exec_ctx);
+      GRPC_SCHEDULING_END_BLOCKING_REGION;
 
       if (grpc_polling_trace.enabled()) {
         gpr_log(GPR_DEBUG, "%p poll=%d", pollset, r);
@@ -1003,16 +989,16 @@
 
         for (i = 1; i < pfd_count; i++) {
           if (watchers[i].fd == nullptr) {
-            fd_end_poll(exec_ctx, &watchers[i], 0, 0, nullptr);
+            fd_end_poll(&watchers[i], 0, 0, nullptr);
           } else {
             // Wake up all the file descriptors, if we have an invalid one
             // we can identify it on the next pollset_work()
-            fd_end_poll(exec_ctx, &watchers[i], 1, 1, pollset);
+            fd_end_poll(&watchers[i], 1, 1, pollset);
           }
         }
       } else if (r == 0) {
         for (i = 1; i < pfd_count; i++) {
-          fd_end_poll(exec_ctx, &watchers[i], 0, 0, nullptr);
+          fd_end_poll(&watchers[i], 0, 0, nullptr);
         }
       } else {
         if (pfds[0].revents & POLLIN_CHECK) {
@@ -1024,14 +1010,14 @@
         }
         for (i = 1; i < pfd_count; i++) {
           if (watchers[i].fd == nullptr) {
-            fd_end_poll(exec_ctx, &watchers[i], 0, 0, nullptr);
+            fd_end_poll(&watchers[i], 0, 0, nullptr);
           } else {
             if (grpc_polling_trace.enabled()) {
               gpr_log(GPR_DEBUG, "%p got_event: %d r:%d w:%d [%d]", pollset,
                       pfds[i].fd, (pfds[i].revents & POLLIN_CHECK) != 0,
                       (pfds[i].revents & POLLOUT_CHECK) != 0, pfds[i].revents);
             }
-            fd_end_poll(exec_ctx, &watchers[i], pfds[i].revents & POLLIN_CHECK,
+            fd_end_poll(&watchers[i], pfds[i].revents & POLLIN_CHECK,
                         pfds[i].revents & POLLOUT_CHECK, pollset);
           }
         }
@@ -1054,7 +1040,7 @@
      worker list, which means nobody could ask us to re-evaluate polling). */
   done:
     if (!locked) {
-      queued_work |= grpc_exec_ctx_flush(exec_ctx);
+      queued_work |= grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(&pollset->mu);
       locked = 1;
     }
@@ -1083,21 +1069,21 @@
   /* check shutdown conditions */
   if (pollset->shutting_down) {
     if (pollset_has_workers(pollset)) {
-      pollset_kick(exec_ctx, pollset, nullptr);
+      pollset_kick(pollset, nullptr);
     } else if (!pollset->called_shutdown && !pollset_has_observers(pollset)) {
       pollset->called_shutdown = 1;
       gpr_mu_unlock(&pollset->mu);
-      finish_shutdown(exec_ctx, pollset);
-      grpc_exec_ctx_flush(exec_ctx);
+      finish_shutdown(pollset);
+      grpc_core::ExecCtx::Get()->Flush();
       /* Continuing to access pollset here is safe -- it is the caller's
        * responsibility to not destroy when it has outstanding calls to
        * pollset_work.
        * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
       gpr_mu_lock(&pollset->mu);
     } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
-      GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pollset->idle_jobs);
+      GRPC_CLOSURE_LIST_SCHED(&pollset->idle_jobs);
       gpr_mu_unlock(&pollset->mu);
-      grpc_exec_ctx_flush(exec_ctx);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(&pollset->mu);
     }
   }
@@ -1107,26 +1093,24 @@
   return error;
 }
 
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                             grpc_closure* closure) {
+static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutting_down = 1;
   pollset->shutdown_done = closure;
-  pollset_kick(exec_ctx, pollset, GRPC_POLLSET_KICK_BROADCAST);
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!pollset_has_workers(pollset)) {
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &pollset->idle_jobs);
+    GRPC_CLOSURE_LIST_SCHED(&pollset->idle_jobs);
   }
   if (!pollset->called_shutdown && !pollset_has_observers(pollset)) {
     pollset->called_shutdown = 1;
-    finish_shutdown(exec_ctx, pollset);
+    finish_shutdown(pollset);
   }
 }
 
-static int poll_deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                           grpc_millis deadline) {
+static int poll_deadline_to_millis_timeout(grpc_millis deadline) {
   if (deadline == GRPC_MILLIS_INF_FUTURE) return -1;
   if (deadline == 0) return 0;
-  grpc_millis n = deadline - grpc_exec_ctx_now(exec_ctx);
+  grpc_millis n = deadline - grpc_core::ExecCtx::Get()->Now();
   if (n < 0) return 0;
   if (n > INT_MAX) return -1;
   return (int)n;
@@ -1143,8 +1127,7 @@
   return pollset_set;
 }
 
-static void pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_pollset_set* pollset_set) {
+static void pollset_set_destroy(grpc_pollset_set* pollset_set) {
   size_t i;
   gpr_mu_destroy(&pollset_set->mu);
   for (i = 0; i < pollset_set->fd_count; i++) {
@@ -1159,7 +1142,7 @@
         !pollset_has_observers(pollset)) {
       pollset->called_shutdown = 1;
       gpr_mu_unlock(&pollset->mu);
-      finish_shutdown(exec_ctx, pollset);
+      finish_shutdown(pollset);
     } else {
       gpr_mu_unlock(&pollset->mu);
     }
@@ -1170,8 +1153,7 @@
   gpr_free(pollset_set);
 }
 
-static void pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pollset_set,
+static void pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                     grpc_pollset* pollset) {
   size_t i, j;
   gpr_mu_lock(&pollset->mu);
@@ -1190,7 +1172,7 @@
     if (fd_is_orphaned(pollset_set->fds[i])) {
       GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
     } else {
-      pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
+      pollset_add_fd(pollset, pollset_set->fds[i]);
       pollset_set->fds[j++] = pollset_set->fds[i];
     }
   }
@@ -1198,8 +1180,7 @@
   gpr_mu_unlock(&pollset_set->mu);
 }
 
-static void pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_pollset_set* pollset_set,
+static void pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                     grpc_pollset* pollset) {
   size_t i;
   gpr_mu_lock(&pollset_set->mu);
@@ -1219,14 +1200,13 @@
       !pollset_has_observers(pollset)) {
     pollset->called_shutdown = 1;
     gpr_mu_unlock(&pollset->mu);
-    finish_shutdown(exec_ctx, pollset);
+    finish_shutdown(pollset);
   } else {
     gpr_mu_unlock(&pollset->mu);
   }
 }
 
-static void pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {
   size_t i, j;
   gpr_mu_lock(&bag->mu);
@@ -1241,7 +1221,7 @@
     if (fd_is_orphaned(bag->fds[i])) {
       GRPC_FD_UNREF(bag->fds[i], "pollset_set");
     } else {
-      pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
+      pollset_set_add_fd(item, bag->fds[i]);
       bag->fds[j++] = bag->fds[i];
     }
   }
@@ -1249,8 +1229,7 @@
   gpr_mu_unlock(&bag->mu);
 }
 
-static void pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset_set* bag,
+static void pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                         grpc_pollset_set* item) {
   size_t i;
   gpr_mu_lock(&bag->mu);
@@ -1265,8 +1244,7 @@
   gpr_mu_unlock(&bag->mu);
 }
 
-static void pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
-                               grpc_pollset_set* pollset_set, grpc_fd* fd) {
+static void pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
   size_t i;
   gpr_mu_lock(&pollset_set->mu);
   if (pollset_set->fd_count == pollset_set->fd_capacity) {
@@ -1277,16 +1255,15 @@
   GRPC_FD_REF(fd, "pollset_set");
   pollset_set->fds[pollset_set->fd_count++] = fd;
   for (i = 0; i < pollset_set->pollset_count; i++) {
-    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
+    pollset_add_fd(pollset_set->pollsets[i], fd);
   }
   for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+    pollset_set_add_fd(pollset_set->pollset_sets[i], fd);
   }
   gpr_mu_unlock(&pollset_set->mu);
 }
 
-static void pollset_set_del_fd(grpc_exec_ctx* exec_ctx,
-                               grpc_pollset_set* pollset_set, grpc_fd* fd) {
+static void pollset_set_del_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
   size_t i;
   gpr_mu_lock(&pollset_set->mu);
   for (i = 0; i < pollset_set->fd_count; i++) {
@@ -1299,7 +1276,7 @@
     }
   }
   for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+    pollset_set_del_fd(pollset_set->pollset_sets[i], fd);
   }
   gpr_mu_unlock(&pollset_set->mu);
 }
@@ -1382,7 +1359,7 @@
   gpr_thd_options opt = gpr_thd_options_default();
   gpr_ref(&g_cvfds.pollcount);
   gpr_thd_options_set_detached(&opt);
-  GPR_ASSERT(gpr_thd_new(&t_id, &run_poll, pargs, &opt));
+  GPR_ASSERT(gpr_thd_new(&t_id, "grpc_poller", &run_poll, pargs, &opt));
   return pargs;
 }
 
diff --git a/src/core/lib/iomgr/ev_posix.cc b/src/core/lib/iomgr/ev_posix.cc
index 031c975..b516f93 100644
--- a/src/core/lib/iomgr/ev_posix.cc
+++ b/src/core/lib/iomgr/ev_posix.cc
@@ -46,7 +46,7 @@
 
 grpc_wakeup_fd grpc_global_wakeup_fd;
 
-static const grpc_event_engine_vtable* g_event_engine;
+static const grpc_event_engine_vtable* g_event_engine = nullptr;
 static const char* g_poll_strategy_name = nullptr;
 
 typedef const grpc_event_engine_vtable* (*event_engine_factory_fn)(
@@ -184,28 +184,25 @@
   return g_event_engine->fd_wrapped_fd(fd);
 }
 
-void grpc_fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_closure* on_done,
-                    int* release_fd, bool already_closed, const char* reason) {
-  g_event_engine->fd_orphan(exec_ctx, fd, on_done, release_fd, already_closed,
-                            reason);
+void grpc_fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
+                    bool already_closed, const char* reason) {
+  g_event_engine->fd_orphan(fd, on_done, release_fd, already_closed, reason);
 }
 
-void grpc_fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why) {
-  g_event_engine->fd_shutdown(exec_ctx, fd, why);
+void grpc_fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  g_event_engine->fd_shutdown(fd, why);
 }
 
 bool grpc_fd_is_shutdown(grpc_fd* fd) {
   return g_event_engine->fd_is_shutdown(fd);
 }
 
-void grpc_fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                            grpc_closure* closure) {
-  g_event_engine->fd_notify_on_read(exec_ctx, fd, closure);
+void grpc_fd_notify_on_read(grpc_fd* fd, grpc_closure* closure) {
+  g_event_engine->fd_notify_on_read(fd, closure);
 }
 
-void grpc_fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                             grpc_closure* closure) {
-  g_event_engine->fd_notify_on_write(exec_ctx, fd, closure);
+void grpc_fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
+  g_event_engine->fd_notify_on_write(fd, closure);
 }
 
 size_t grpc_pollset_size(void) { return g_event_engine->pollset_size; }
@@ -214,72 +211,63 @@
   g_event_engine->pollset_init(pollset, mu);
 }
 
-void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure) {
-  g_event_engine->pollset_shutdown(exec_ctx, pollset, closure);
+void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
+  g_event_engine->pollset_shutdown(pollset, closure);
 }
 
-void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
-  g_event_engine->pollset_destroy(exec_ctx, pollset);
+void grpc_pollset_destroy(grpc_pollset* pollset) {
+  g_event_engine->pollset_destroy(pollset);
 }
 
-grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker,
                               grpc_millis deadline) {
-  return g_event_engine->pollset_work(exec_ctx, pollset, worker, deadline);
+  return g_event_engine->pollset_work(pollset, worker, deadline);
 }
 
-grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_kick(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker) {
-  return g_event_engine->pollset_kick(exec_ctx, pollset, specific_worker);
+  return g_event_engine->pollset_kick(pollset, specific_worker);
 }
 
-void grpc_pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         struct grpc_fd* fd) {
-  g_event_engine->pollset_add_fd(exec_ctx, pollset, fd);
+void grpc_pollset_add_fd(grpc_pollset* pollset, struct grpc_fd* fd) {
+  g_event_engine->pollset_add_fd(pollset, fd);
 }
 
 grpc_pollset_set* grpc_pollset_set_create(void) {
   return g_event_engine->pollset_set_create();
 }
 
-void grpc_pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set) {
-  g_event_engine->pollset_set_destroy(exec_ctx, pollset_set);
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {
+  g_event_engine->pollset_set_destroy(pollset_set);
 }
 
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {
-  g_event_engine->pollset_set_add_pollset(exec_ctx, pollset_set, pollset);
+  g_event_engine->pollset_set_add_pollset(pollset_set, pollset);
 }
 
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {
-  g_event_engine->pollset_set_del_pollset(exec_ctx, pollset_set, pollset);
+  g_event_engine->pollset_set_del_pollset(pollset_set, pollset);
 }
 
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {
-  g_event_engine->pollset_set_add_pollset_set(exec_ctx, bag, item);
+  g_event_engine->pollset_set_add_pollset_set(bag, item);
 }
 
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {
-  g_event_engine->pollset_set_del_pollset_set(exec_ctx, bag, item);
+  g_event_engine->pollset_set_del_pollset_set(bag, item);
 }
 
-void grpc_pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd) {
-  g_event_engine->pollset_set_add_fd(exec_ctx, pollset_set, fd);
+void grpc_pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
+  g_event_engine->pollset_set_add_fd(pollset_set, fd);
 }
 
-void grpc_pollset_set_del_fd(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd) {
-  g_event_engine->pollset_set_del_fd(exec_ctx, pollset_set, fd);
+void grpc_pollset_set_del_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
+  g_event_engine->pollset_set_del_fd(pollset_set, fd);
 }
 
 #endif  // GRPC_POSIX_SOCKET
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
index 16fa10c..62f1162 100644
--- a/src/core/lib/iomgr/ev_posix.h
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -36,48 +36,36 @@
 
   grpc_fd* (*fd_create)(int fd, const char* name);
   int (*fd_wrapped_fd)(grpc_fd* fd);
-  void (*fd_orphan)(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_closure* on_done,
-                    int* release_fd, bool already_closed, const char* reason);
-  void (*fd_shutdown)(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why);
-  void (*fd_notify_on_read)(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                            grpc_closure* closure);
-  void (*fd_notify_on_write)(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                             grpc_closure* closure);
+  void (*fd_orphan)(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
+                    bool already_closed, const char* reason);
+  void (*fd_shutdown)(grpc_fd* fd, grpc_error* why);
+  void (*fd_notify_on_read)(grpc_fd* fd, grpc_closure* closure);
+  void (*fd_notify_on_write)(grpc_fd* fd, grpc_closure* closure);
   bool (*fd_is_shutdown)(grpc_fd* fd);
-  grpc_pollset* (*fd_get_read_notifier_pollset)(grpc_exec_ctx* exec_ctx,
-                                                grpc_fd* fd);
+  grpc_pollset* (*fd_get_read_notifier_pollset)(grpc_fd* fd);
 
   void (*pollset_init)(grpc_pollset* pollset, gpr_mu** mu);
-  void (*pollset_shutdown)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure);
-  void (*pollset_destroy)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset);
-  grpc_error* (*pollset_work)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+  void (*pollset_shutdown)(grpc_pollset* pollset, grpc_closure* closure);
+  void (*pollset_destroy)(grpc_pollset* pollset);
+  grpc_error* (*pollset_work)(grpc_pollset* pollset,
                               grpc_pollset_worker** worker,
                               grpc_millis deadline);
-  grpc_error* (*pollset_kick)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+  grpc_error* (*pollset_kick)(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker);
-  void (*pollset_add_fd)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         struct grpc_fd* fd);
+  void (*pollset_add_fd)(grpc_pollset* pollset, struct grpc_fd* fd);
 
   grpc_pollset_set* (*pollset_set_create)(void);
-  void (*pollset_set_destroy)(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set);
-  void (*pollset_set_add_pollset)(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+  void (*pollset_set_destroy)(grpc_pollset_set* pollset_set);
+  void (*pollset_set_add_pollset)(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset);
-  void (*pollset_set_del_pollset)(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+  void (*pollset_set_del_pollset)(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset);
-  void (*pollset_set_add_pollset_set)(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+  void (*pollset_set_add_pollset_set)(grpc_pollset_set* bag,
                                       grpc_pollset_set* item);
-  void (*pollset_set_del_pollset_set)(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+  void (*pollset_set_del_pollset_set)(grpc_pollset_set* bag,
                                       grpc_pollset_set* item);
-  void (*pollset_set_add_fd)(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd);
-  void (*pollset_set_del_fd)(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd);
+  void (*pollset_set_add_fd)(grpc_pollset_set* pollset_set, grpc_fd* fd);
+  void (*pollset_set_del_fd)(grpc_pollset_set* pollset_set, grpc_fd* fd);
 
   void (*shutdown_engine)(void);
 } grpc_event_engine_vtable;
@@ -103,14 +91,14 @@
    Requires: *fd initialized; no outstanding notify_on_read or
    notify_on_write.
    MUST NOT be called with a pollset lock taken */
-void grpc_fd_orphan(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_closure* on_done,
-                    int* release_fd, bool already_closed, const char* reason);
+void grpc_fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
+                    bool already_closed, const char* reason);
 
 /* Has grpc_fd_shutdown been called on an fd? */
 bool grpc_fd_is_shutdown(grpc_fd* fd);
 
 /* Cause any current and future callbacks to fail. */
-void grpc_fd_shutdown(grpc_exec_ctx* exec_ctx, grpc_fd* fd, grpc_error* why);
+void grpc_fd_shutdown(grpc_fd* fd, grpc_error* why);
 
 /* Register read interest, causing read_cb to be called once when fd becomes
    readable, on deadline specified by deadline, or on shutdown triggered by
@@ -125,29 +113,23 @@
    underlying platform. This means that users must drain fd in read_cb before
    calling notify_on_read again. Users are also expected to handle spurious
    events, i.e read_cb is called while nothing can be readable from fd  */
-void grpc_fd_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                            grpc_closure* closure);
+void grpc_fd_notify_on_read(grpc_fd* fd, grpc_closure* closure);
 
 /* Exactly the same semantics as above, except based on writable events.  */
-void grpc_fd_notify_on_write(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                             grpc_closure* closure);
+void grpc_fd_notify_on_write(grpc_fd* fd, grpc_closure* closure);
 
 /* Return the read notifier pollset from the fd */
-grpc_pollset* grpc_fd_get_read_notifier_pollset(grpc_exec_ctx* exec_ctx,
-                                                grpc_fd* fd);
+grpc_pollset* grpc_fd_get_read_notifier_pollset(grpc_fd* fd);
 
 /* pollset_posix functions */
 
 /* Add an fd to a pollset */
-void grpc_pollset_add_fd(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                         struct grpc_fd* fd);
+void grpc_pollset_add_fd(grpc_pollset* pollset, struct grpc_fd* fd);
 
 /* pollset_set_posix functions */
 
-void grpc_pollset_set_add_fd(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd);
-void grpc_pollset_set_del_fd(grpc_exec_ctx* exec_ctx,
-                             grpc_pollset_set* pollset_set, grpc_fd* fd);
+void grpc_pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd);
+void grpc_pollset_set_del_fd(grpc_pollset_set* pollset_set, grpc_fd* fd);
 
 /* override to allow tests to hook poll() usage */
 typedef int (*grpc_poll_function_type)(struct pollfd*, nfds_t, int);
diff --git a/src/core/lib/iomgr/exec_ctx.cc b/src/core/lib/iomgr/exec_ctx.cc
index 1777456..e005437 100644
--- a/src/core/lib/iomgr/exec_ctx.cc
+++ b/src/core/lib/iomgr/exec_ctx.cc
@@ -25,39 +25,7 @@
 #include "src/core/lib/iomgr/combiner.h"
 #include "src/core/lib/profiling/timers.h"
 
-bool grpc_exec_ctx_ready_to_finish(grpc_exec_ctx* exec_ctx) {
-  if ((exec_ctx->flags & GRPC_EXEC_CTX_FLAG_IS_FINISHED) == 0) {
-    if (exec_ctx->check_ready_to_finish(exec_ctx,
-                                        exec_ctx->check_ready_to_finish_arg)) {
-      exec_ctx->flags |= GRPC_EXEC_CTX_FLAG_IS_FINISHED;
-      return true;
-    }
-    return false;
-  } else {
-    return true;
-  }
-}
-
-bool grpc_never_ready_to_finish(grpc_exec_ctx* exec_ctx, void* arg_ignored) {
-  return false;
-}
-
-bool grpc_always_ready_to_finish(grpc_exec_ctx* exec_ctx, void* arg_ignored) {
-  return true;
-}
-
-bool grpc_exec_ctx_has_work(grpc_exec_ctx* exec_ctx) {
-  return exec_ctx->active_combiner != nullptr ||
-         !grpc_closure_list_empty(exec_ctx->closure_list);
-}
-
-void grpc_exec_ctx_finish(grpc_exec_ctx* exec_ctx) {
-  exec_ctx->flags |= GRPC_EXEC_CTX_FLAG_IS_FINISHED;
-  grpc_exec_ctx_flush(exec_ctx);
-}
-
-static void exec_ctx_run(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                         grpc_error* error) {
+static void exec_ctx_run(grpc_closure* closure, grpc_error* error) {
 #ifndef NDEBUG
   closure->scheduled = false;
   if (grpc_trace_closure.enabled()) {
@@ -67,7 +35,7 @@
             closure->line_initiated);
   }
 #endif
-  closure->cb(exec_ctx, closure->cb_arg, error);
+  closure->cb(closure->cb_arg, error);
 #ifndef NDEBUG
   if (grpc_trace_closure.enabled()) {
     gpr_log(GPR_DEBUG, "closure %p finished", closure);
@@ -76,42 +44,13 @@
   GRPC_ERROR_UNREF(error);
 }
 
-bool grpc_exec_ctx_flush(grpc_exec_ctx* exec_ctx) {
-  bool did_something = 0;
-  GPR_TIMER_BEGIN("grpc_exec_ctx_flush", 0);
-  for (;;) {
-    if (!grpc_closure_list_empty(exec_ctx->closure_list)) {
-      grpc_closure* c = exec_ctx->closure_list.head;
-      exec_ctx->closure_list.head = exec_ctx->closure_list.tail = nullptr;
-      while (c != nullptr) {
-        grpc_closure* next = c->next_data.next;
-        grpc_error* error = c->error_data.error;
-        did_something = true;
-        exec_ctx_run(exec_ctx, c, error);
-        c = next;
-      }
-    } else if (!grpc_combiner_continue_exec_ctx(exec_ctx)) {
-      break;
-    }
-  }
-  GPR_ASSERT(exec_ctx->active_combiner == nullptr);
-  GPR_TIMER_END("grpc_exec_ctx_flush", 0);
-  return did_something;
-}
-
-static void exec_ctx_sched(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                           grpc_error* error) {
-  grpc_closure_list_append(&exec_ctx->closure_list, closure, error);
+static void exec_ctx_sched(grpc_closure* closure, grpc_error* error) {
+  grpc_closure_list_append(grpc_core::ExecCtx::Get()->closure_list(), closure,
+                           error);
 }
 
 static gpr_timespec g_start_time;
 
-void grpc_exec_ctx_global_init(void) {
-  g_start_time = gpr_now(GPR_CLOCK_MONOTONIC);
-}
-
-void grpc_exec_ctx_global_shutdown(void) {}
-
 static gpr_atm timespec_to_atm_round_down(gpr_timespec ts) {
   ts = gpr_time_sub(ts, g_start_time);
   double x =
@@ -131,18 +70,6 @@
   return (gpr_atm)x;
 }
 
-grpc_millis grpc_exec_ctx_now(grpc_exec_ctx* exec_ctx) {
-  if (!exec_ctx->now_is_valid) {
-    exec_ctx->now = timespec_to_atm_round_down(gpr_now(GPR_CLOCK_MONOTONIC));
-    exec_ctx->now_is_valid = true;
-  }
-  return exec_ctx->now;
-}
-
-void grpc_exec_ctx_invalidate_now(grpc_exec_ctx* exec_ctx) {
-  exec_ctx->now_is_valid = false;
-}
-
 gpr_timespec grpc_millis_to_timespec(grpc_millis millis,
                                      gpr_clock_type clock_type) {
   // special-case infinities as grpc_millis can be 32bit on some platforms
@@ -175,3 +102,44 @@
     exec_ctx_run, exec_ctx_sched, "exec_ctx"};
 static grpc_closure_scheduler exec_ctx_scheduler = {&exec_ctx_scheduler_vtable};
 grpc_closure_scheduler* grpc_schedule_on_exec_ctx = &exec_ctx_scheduler;
+
+namespace grpc_core {
+GPR_TLS_CLASS_DEF(ExecCtx::exec_ctx_);
+
+void ExecCtx::GlobalInit(void) {
+  g_start_time = gpr_now(GPR_CLOCK_MONOTONIC);
+  gpr_tls_init(&exec_ctx_);
+}
+
+bool ExecCtx::Flush() {
+  bool did_something = 0;
+  GPR_TIMER_BEGIN("grpc_exec_ctx_flush", 0);
+  for (;;) {
+    if (!grpc_closure_list_empty(closure_list_)) {
+      grpc_closure* c = closure_list_.head;
+      closure_list_.head = closure_list_.tail = nullptr;
+      while (c != nullptr) {
+        grpc_closure* next = c->next_data.next;
+        grpc_error* error = c->error_data.error;
+        did_something = true;
+        exec_ctx_run(c, error);
+        c = next;
+      }
+    } else if (!grpc_combiner_continue_exec_ctx()) {
+      break;
+    }
+  }
+  GPR_ASSERT(combiner_data_.active_combiner == nullptr);
+  GPR_TIMER_END("grpc_exec_ctx_flush", 0);
+  return did_something;
+}
+
+grpc_millis ExecCtx::Now() {
+  if (!now_is_valid_) {
+    now_ = timespec_to_atm_round_down(gpr_now(GPR_CLOCK_MONOTONIC));
+    now_is_valid_ = true;
+  }
+  return now_;
+}
+
+}  // namespace grpc_core
diff --git a/src/core/lib/iomgr/exec_ctx.h b/src/core/lib/iomgr/exec_ctx.h
index b415d2c..8f8d518 100644
--- a/src/core/lib/iomgr/exec_ctx.h
+++ b/src/core/lib/iomgr/exec_ctx.h
@@ -21,6 +21,8 @@
 
 #include <grpc/support/atm.h>
 #include <grpc/support/cpu.h>
+#include <grpc/support/log.h>
+#include <grpc/support/tls.h>
 
 #include "src/core/lib/iomgr/closure.h"
 
@@ -41,6 +43,13 @@
    should be given to not delete said call/channel from this exec_ctx */
 #define GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP 2
 
+extern grpc_closure_scheduler* grpc_schedule_on_exec_ctx;
+
+gpr_timespec grpc_millis_to_timespec(grpc_millis millis, gpr_clock_type clock);
+grpc_millis grpc_timespec_to_millis_round_down(gpr_timespec timespec);
+grpc_millis grpc_timespec_to_millis_round_up(gpr_timespec timespec);
+
+namespace grpc_core {
 /** Execution context.
  *  A bag of data that collects information along a callstack.
  *  Generally created at public API entry points, and passed down as
@@ -61,63 +70,133 @@
  *  - Instances are always passed as the first argument to a function that
  *    takes it, and always as a pointer (grpc_exec_ctx is never copied).
  */
-struct grpc_exec_ctx {
-  grpc_closure_list closure_list;
-  /** currently active combiner: updated only via combiner.c */
-  grpc_combiner* active_combiner;
-  /** last active combiner in the active combiner list */
-  grpc_combiner* last_combiner;
-  uintptr_t flags;
-  unsigned starting_cpu;
-  void* check_ready_to_finish_arg;
-  bool (*check_ready_to_finish)(grpc_exec_ctx* exec_ctx, void* arg);
+class ExecCtx {
+ public:
+  /** Default Constructor */
 
-  bool now_is_valid;
-  grpc_millis now;
-};
+  ExecCtx() : flags_(GRPC_EXEC_CTX_FLAG_IS_FINISHED) { Set(this); }
 
-/* initializer for grpc_exec_ctx:
-   prefer to use GRPC_EXEC_CTX_INIT whenever possible */
-#define GRPC_EXEC_CTX_INITIALIZER(flags, finish_check, finish_check_arg) \
-  {                                                                      \
-    GRPC_CLOSURE_LIST_INIT, NULL, NULL, flags, gpr_cpu_current_cpu(),    \
-        finish_check_arg, finish_check, false, 0                         \
+  /** Parameterised Constructor */
+  ExecCtx(uintptr_t fl) : flags_(fl) { Set(this); }
+
+  /** Destructor */
+  virtual ~ExecCtx() {
+    flags_ |= GRPC_EXEC_CTX_FLAG_IS_FINISHED;
+    Flush();
+    Set(last_exec_ctx_);
   }
 
-/* initialize an execution context at the top level of an API call into grpc
-   (this is safe to use elsewhere, though possibly not as efficient) */
-#define GRPC_EXEC_CTX_INIT \
-  GRPC_EXEC_CTX_INITIALIZER(GRPC_EXEC_CTX_FLAG_IS_FINISHED, NULL, NULL)
+  /** Disallow copy and assignment operators */
+  ExecCtx(const ExecCtx&) = delete;
+  ExecCtx& operator=(const ExecCtx&) = delete;
 
-extern grpc_closure_scheduler* grpc_schedule_on_exec_ctx;
+  /** Return starting_cpu */
+  unsigned starting_cpu() const { return starting_cpu_; }
 
-bool grpc_exec_ctx_has_work(grpc_exec_ctx* exec_ctx);
+  struct CombinerData {
+    /* currently active combiner: updated only via combiner.c */
+    grpc_combiner* active_combiner;
+    /* last active combiner in the active combiner list */
+    grpc_combiner* last_combiner;
+  };
 
-/** Flush any work that has been enqueued onto this grpc_exec_ctx.
- *  Caller must guarantee that no interfering locks are held.
- *  Returns true if work was performed, false otherwise. */
-bool grpc_exec_ctx_flush(grpc_exec_ctx* exec_ctx);
-/** Finish any pending work for a grpc_exec_ctx. Must be called before
- *  the instance is destroyed, or work may be lost. */
-void grpc_exec_ctx_finish(grpc_exec_ctx* exec_ctx);
-/** Returns true if we'd like to leave this execution context as soon as
-    possible: useful for deciding whether to do something more or not depending
-    on outside context */
-bool grpc_exec_ctx_ready_to_finish(grpc_exec_ctx* exec_ctx);
-/** A finish check that is never ready to finish */
-bool grpc_never_ready_to_finish(grpc_exec_ctx* exec_ctx, void* arg_ignored);
-/** A finish check that is always ready to finish */
-bool grpc_always_ready_to_finish(grpc_exec_ctx* exec_ctx, void* arg_ignored);
+  /** Only to be used by grpc-combiner code */
+  CombinerData* combiner_data() { return &combiner_data_; }
 
-void grpc_exec_ctx_global_init(void);
+  /** Return pointer to grpc_closure_list */
+  grpc_closure_list* closure_list() { return &closure_list_; }
 
-void grpc_exec_ctx_global_init(void);
-void grpc_exec_ctx_global_shutdown(void);
+  /** Return flags */
+  uintptr_t flags() { return flags_; }
 
-grpc_millis grpc_exec_ctx_now(grpc_exec_ctx* exec_ctx);
-void grpc_exec_ctx_invalidate_now(grpc_exec_ctx* exec_ctx);
-gpr_timespec grpc_millis_to_timespec(grpc_millis millis, gpr_clock_type clock);
-grpc_millis grpc_timespec_to_millis_round_down(gpr_timespec timespec);
-grpc_millis grpc_timespec_to_millis_round_up(gpr_timespec timespec);
+  /** Checks if there is work to be done */
+  bool HasWork() {
+    return combiner_data_.active_combiner != NULL ||
+           !grpc_closure_list_empty(closure_list_);
+  }
+
+  /** Flush any work that has been enqueued onto this grpc_exec_ctx.
+   *  Caller must guarantee that no interfering locks are held.
+   *  Returns true if work was performed, false otherwise. */
+  bool Flush();
+
+  /** Returns true if we'd like to leave this execution context as soon as
+possible: useful for deciding whether to do something more or not depending
+on outside context */
+  bool IsReadyToFinish() {
+    if ((flags_ & GRPC_EXEC_CTX_FLAG_IS_FINISHED) == 0) {
+      if (CheckReadyToFinish()) {
+        flags_ |= GRPC_EXEC_CTX_FLAG_IS_FINISHED;
+        return true;
+      }
+      return false;
+    } else {
+      return true;
+    }
+  }
+
+  /** Returns the stored current time relative to start if valid,
+   * otherwise refreshes the stored time, sets it valid and returns the new
+   * value */
+  grpc_millis Now();
+
+  /** Invalidates the stored time value. A new time value will be set on calling
+   * Now() */
+  void InvalidateNow() { now_is_valid_ = false; }
+
+  /** To be used only by shutdown code in iomgr */
+  void SetNowIomgrShutdown() {
+    now_ = GRPC_MILLIS_INF_FUTURE;
+    now_is_valid_ = true;
+  }
+
+  /** To be used only for testing.
+   * Sets the now value
+   */
+  void TestOnlySetNow(grpc_millis new_val) {
+    now_ = new_val;
+    now_is_valid_ = true;
+  }
+
+  /** Finish any pending work for a grpc_exec_ctx. Must be called before
+   *  the instance is destroyed, or work may be lost. */
+  void Finish();
+
+  /** Global initialization for ExecCtx. Called by iomgr */
+  static void GlobalInit(void);
+
+  /** Global shutdown for ExecCtx. Called by iomgr */
+  static void GlobalShutdown(void) { gpr_tls_destroy(&exec_ctx_); }
+
+  /** Gets pointer to current exec_ctx */
+  static ExecCtx* Get() {
+    return reinterpret_cast<ExecCtx*>(gpr_tls_get(&exec_ctx_));
+  }
+
+ protected:
+  /** Check if ready to finish */
+  virtual bool CheckReadyToFinish() { return false; }
+
+  /** Disallow delete on ExecCtx */
+  static void operator delete(void* p) { abort(); }
+
+ private:
+  /** Set exec_ctx_ to exec_ctx */
+  void Set(ExecCtx* exec_ctx) {
+    gpr_tls_set(&exec_ctx_, reinterpret_cast<intptr_t>(exec_ctx));
+  }
+
+  grpc_closure_list closure_list_ = GRPC_CLOSURE_LIST_INIT;
+  CombinerData combiner_data_ = {nullptr, nullptr};
+  uintptr_t flags_;
+  unsigned starting_cpu_ = gpr_cpu_current_cpu();
+
+  bool now_is_valid_ = false;
+  grpc_millis now_ = 0;
+
+  GPR_TLS_CLASS_DECL(exec_ctx_);
+  ExecCtx* last_exec_ctx_ = Get();
+};
+}  // namespace grpc_core
 
 #endif /* GRPC_CORE_LIB_IOMGR_EXEC_CTX_H */
diff --git a/src/core/lib/iomgr/executor.cc b/src/core/lib/iomgr/executor.cc
index cca59e7..b7288d5 100644
--- a/src/core/lib/iomgr/executor.cc
+++ b/src/core/lib/iomgr/executor.cc
@@ -55,7 +55,7 @@
 
 static void executor_thread(void* arg);
 
-static size_t run_closures(grpc_exec_ctx* exec_ctx, grpc_closure_list list) {
+static size_t run_closures(grpc_closure_list list) {
   size_t n = 0;
 
   grpc_closure* c = list.head;
@@ -73,11 +73,11 @@
 #ifndef NDEBUG
     c->scheduled = false;
 #endif
-    c->cb(exec_ctx, c->cb_arg, error);
+    c->cb(c->cb_arg, error);
     GRPC_ERROR_UNREF(error);
     c = next;
     n++;
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   return n;
@@ -87,7 +87,7 @@
   return gpr_atm_no_barrier_load(&g_cur_threads) > 0;
 }
 
-void grpc_executor_set_threading(grpc_exec_ctx* exec_ctx, bool threading) {
+void grpc_executor_set_threading(bool threading) {
   gpr_atm cur_threads = gpr_atm_no_barrier_load(&g_cur_threads);
   if (threading) {
     if (cur_threads > 0) return;
@@ -104,8 +104,8 @@
 
     gpr_thd_options opt = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&opt);
-    gpr_thd_new(&g_thread_state[0].id, executor_thread, &g_thread_state[0],
-                &opt);
+    gpr_thd_new(&g_thread_state[0].id, "grpc_executor", executor_thread,
+                &g_thread_state[0], &opt);
   } else {
     if (cur_threads == 0) return;
     for (size_t i = 0; i < g_max_threads; i++) {
@@ -125,28 +125,25 @@
     for (size_t i = 0; i < g_max_threads; i++) {
       gpr_mu_destroy(&g_thread_state[i].mu);
       gpr_cv_destroy(&g_thread_state[i].cv);
-      run_closures(exec_ctx, g_thread_state[i].elems);
+      run_closures(g_thread_state[i].elems);
     }
     gpr_free(g_thread_state);
     gpr_tls_destroy(&g_this_thread_state);
   }
 }
 
-void grpc_executor_init(grpc_exec_ctx* exec_ctx) {
+void grpc_executor_init() {
   gpr_atm_no_barrier_store(&g_cur_threads, 0);
-  grpc_executor_set_threading(exec_ctx, true);
+  grpc_executor_set_threading(true);
 }
 
-void grpc_executor_shutdown(grpc_exec_ctx* exec_ctx) {
-  grpc_executor_set_threading(exec_ctx, false);
-}
+void grpc_executor_shutdown() { grpc_executor_set_threading(false); }
 
 static void executor_thread(void* arg) {
   thread_state* ts = (thread_state*)arg;
   gpr_tls_set(&g_this_thread_state, (intptr_t)ts);
 
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, nullptr);
+  grpc_core::ExecCtx exec_ctx(0);
 
   size_t subtract_depth = 0;
   for (;;) {
@@ -168,7 +165,7 @@
       gpr_mu_unlock(&ts->mu);
       break;
     }
-    GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED(&exec_ctx);
+    GRPC_STATS_INC_EXECUTOR_QUEUE_DRAINED();
     grpc_closure_list exec = ts->elems;
     ts->elems = GRPC_CLOSURE_LIST_INIT;
     gpr_mu_unlock(&ts->mu);
@@ -176,19 +173,18 @@
       gpr_log(GPR_DEBUG, "EXECUTOR[%d]: execute", (int)(ts - g_thread_state));
     }
 
-    grpc_exec_ctx_invalidate_now(&exec_ctx);
-    subtract_depth = run_closures(&exec_ctx, exec);
+    grpc_core::ExecCtx::Get()->InvalidateNow();
+    subtract_depth = run_closures(exec);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void executor_push(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                          grpc_error* error, bool is_short) {
+static void executor_push(grpc_closure* closure, grpc_error* error,
+                          bool is_short) {
   bool retry_push;
   if (is_short) {
-    GRPC_STATS_INC_EXECUTOR_SCHEDULED_SHORT_ITEMS(exec_ctx);
+    GRPC_STATS_INC_EXECUTOR_SCHEDULED_SHORT_ITEMS();
   } else {
-    GRPC_STATS_INC_EXECUTOR_SCHEDULED_LONG_ITEMS(exec_ctx);
+    GRPC_STATS_INC_EXECUTOR_SCHEDULED_LONG_ITEMS();
   }
   do {
     retry_push = false;
@@ -202,14 +198,16 @@
         gpr_log(GPR_DEBUG, "EXECUTOR: schedule %p inline", closure);
 #endif
       }
-      grpc_closure_list_append(&exec_ctx->closure_list, closure, error);
+      grpc_closure_list_append(grpc_core::ExecCtx::Get()->closure_list(),
+                               closure, error);
       return;
     }
     thread_state* ts = (thread_state*)gpr_tls_get(&g_this_thread_state);
     if (ts == nullptr) {
-      ts = &g_thread_state[GPR_HASH_POINTER(exec_ctx, cur_thread_count)];
+      ts = &g_thread_state[GPR_HASH_POINTER(grpc_core::ExecCtx::Get(),
+                                            cur_thread_count)];
     } else {
-      GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF(exec_ctx);
+      GRPC_STATS_INC_EXECUTOR_SCHEDULED_TO_SELF();
     }
     thread_state* orig_ts = ts;
 
@@ -245,7 +243,7 @@
         continue;
       }
       if (grpc_closure_list_empty(ts->elems)) {
-        GRPC_STATS_INC_EXECUTOR_WAKEUP_INITIATED(exec_ctx);
+        GRPC_STATS_INC_EXECUTOR_WAKEUP_INITIATED();
         gpr_cv_signal(&ts->cv);
       }
       grpc_closure_list_append(&ts->elems, closure, error);
@@ -263,25 +261,23 @@
 
         gpr_thd_options opt = gpr_thd_options_default();
         gpr_thd_options_set_joinable(&opt);
-        gpr_thd_new(&g_thread_state[cur_thread_count].id, executor_thread,
-                    &g_thread_state[cur_thread_count], &opt);
+        gpr_thd_new(&g_thread_state[cur_thread_count].id, "gpr_executor",
+                    executor_thread, &g_thread_state[cur_thread_count], &opt);
       }
       gpr_spinlock_unlock(&g_adding_thread_lock);
     }
     if (retry_push) {
-      GRPC_STATS_INC_EXECUTOR_PUSH_RETRIES(exec_ctx);
+      GRPC_STATS_INC_EXECUTOR_PUSH_RETRIES();
     }
   } while (retry_push);
 }
 
-static void executor_push_short(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                                grpc_error* error) {
-  executor_push(exec_ctx, closure, error, true);
+static void executor_push_short(grpc_closure* closure, grpc_error* error) {
+  executor_push(closure, error, true);
 }
 
-static void executor_push_long(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                               grpc_error* error) {
-  executor_push(exec_ctx, closure, error, false);
+static void executor_push_long(grpc_closure* closure, grpc_error* error) {
+  executor_push(closure, error, false);
 }
 
 static const grpc_closure_scheduler_vtable executor_vtable_short = {
diff --git a/src/core/lib/iomgr/executor.h b/src/core/lib/iomgr/executor.h
index d349083..e16f11a 100644
--- a/src/core/lib/iomgr/executor.h
+++ b/src/core/lib/iomgr/executor.h
@@ -31,18 +31,18 @@
  * This mechanism is meant to outsource work (grpc_closure instances) to a
  * thread, for those cases where blocking isn't an option but there isn't a
  * non-blocking solution available. */
-void grpc_executor_init(grpc_exec_ctx* exec_ctx);
+void grpc_executor_init();
 
 grpc_closure_scheduler* grpc_executor_scheduler(grpc_executor_job_length);
 
 /** Shutdown the executor, running all pending work as part of the call */
-void grpc_executor_shutdown(grpc_exec_ctx* exec_ctx);
+void grpc_executor_shutdown();
 
 /** Is the executor multi-threaded? */
 bool grpc_executor_is_threaded();
 
 /* enable/disable threading - must be called after grpc_executor_init and before
    grpc_executor_shutdown */
-void grpc_executor_set_threading(grpc_exec_ctx* exec_ctx, bool enable);
+void grpc_executor_set_threading(bool enable);
 
 #endif /* GRPC_CORE_LIB_IOMGR_EXECUTOR_H */
diff --git a/src/core/lib/iomgr/fork_posix.cc b/src/core/lib/iomgr/fork_posix.cc
index f3cfd14..cc13140 100644
--- a/src/core/lib/iomgr/fork_posix.cc
+++ b/src/core/lib/iomgr/fork_posix.cc
@@ -49,10 +49,10 @@
     return;
   }
   if (grpc_is_initialized()) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_timer_manager_set_threading(false);
-    grpc_executor_set_threading(&exec_ctx, false);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_executor_set_threading(false);
+    grpc_core::ExecCtx::Get()->Flush();
     if (!gpr_await_threads(
             gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                          gpr_time_from_seconds(3, GPR_TIMESPAN)))) {
@@ -64,18 +64,17 @@
 void grpc_postfork_parent() {
   if (grpc_is_initialized()) {
     grpc_timer_manager_set_threading(true);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_executor_set_threading(&exec_ctx, true);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(true);
   }
 }
 
 void grpc_postfork_child() {
   if (grpc_is_initialized()) {
     grpc_timer_manager_set_threading(true);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_executor_set_threading(&exec_ctx, true);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(true);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 }
 
diff --git a/src/core/lib/iomgr/iocp_windows.cc b/src/core/lib/iomgr/iocp_windows.cc
index 6bbe566..0b6e682 100644
--- a/src/core/lib/iomgr/iocp_windows.cc
+++ b/src/core/lib/iomgr/iocp_windows.cc
@@ -42,20 +42,18 @@
 
 static HANDLE g_iocp;
 
-static DWORD deadline_to_millis_timeout(grpc_exec_ctx* exec_ctx,
-                                        grpc_millis deadline) {
+static DWORD deadline_to_millis_timeout(grpc_millis deadline) {
   if (deadline == GRPC_MILLIS_INF_FUTURE) {
     return INFINITE;
   }
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   if (deadline < now) return 0;
   grpc_millis timeout = deadline - now;
   if (timeout > std::numeric_limits<DWORD>::max()) return INFINITE;
   return static_cast<DWORD>(deadline - now);
 }
 
-grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx* exec_ctx,
-                                     grpc_millis deadline) {
+grpc_iocp_work_status grpc_iocp_work(grpc_millis deadline) {
   BOOL success;
   DWORD bytes = 0;
   DWORD flags = 0;
@@ -63,11 +61,11 @@
   LPOVERLAPPED overlapped;
   grpc_winsocket* socket;
   grpc_winsocket_callback_info* info;
-  GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
+  GRPC_STATS_INC_SYSCALL_POLL();
   success =
       GetQueuedCompletionStatus(g_iocp, &bytes, &completion_key, &overlapped,
-                                deadline_to_millis_timeout(exec_ctx, deadline));
-  grpc_exec_ctx_invalidate_now(exec_ctx);
+                                deadline_to_millis_timeout(deadline));
+  grpc_core::ExecCtx::Get()->InvalidateNow();
   if (success == 0 && overlapped == NULL) {
     return GRPC_IOCP_WORK_TIMEOUT;
   }
@@ -95,7 +93,7 @@
   info->bytes_transfered = bytes;
   info->wsa_error = success ? 0 : WSAGetLastError();
   GPR_ASSERT(overlapped == &info->overlapped);
-  grpc_socket_become_ready(exec_ctx, socket, info);
+  grpc_socket_become_ready(socket, info);
   return GRPC_IOCP_WORK_WORK;
 }
 
@@ -115,22 +113,22 @@
 }
 
 void grpc_iocp_flush(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_iocp_work_status work_status;
 
   do {
-    work_status = grpc_iocp_work(&exec_ctx, GRPC_MILLIS_INF_PAST);
+    work_status = grpc_iocp_work(GRPC_MILLIS_INF_PAST);
   } while (work_status == GRPC_IOCP_WORK_KICK ||
-           grpc_exec_ctx_flush(&exec_ctx));
+           grpc_core::ExecCtx::Get()->Flush());
 }
 
 void grpc_iocp_shutdown(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (gpr_atm_acq_load(&g_custom_events)) {
-    grpc_iocp_work(&exec_ctx, GRPC_MILLIS_INF_FUTURE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_iocp_work(GRPC_MILLIS_INF_FUTURE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   GPR_ASSERT(CloseHandle(g_iocp));
 }
 
diff --git a/src/core/lib/iomgr/iocp_windows.h b/src/core/lib/iomgr/iocp_windows.h
index 0e9c348..75b0ff4 100644
--- a/src/core/lib/iomgr/iocp_windows.h
+++ b/src/core/lib/iomgr/iocp_windows.h
@@ -33,8 +33,7 @@
   GRPC_IOCP_WORK_KICK
 } grpc_iocp_work_status;
 
-grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx* exec_ctx,
-                                     grpc_millis deadline);
+grpc_iocp_work_status grpc_iocp_work(grpc_millis deadline);
 void grpc_iocp_init(void);
 void grpc_iocp_kick(void);
 void grpc_iocp_flush(void);
diff --git a/src/core/lib/iomgr/iomgr.cc b/src/core/lib/iomgr/iomgr.cc
index bdedd85..70807c4 100644
--- a/src/core/lib/iomgr/iomgr.cc
+++ b/src/core/lib/iomgr/iomgr.cc
@@ -45,20 +45,20 @@
 static int g_shutdown;
 static grpc_iomgr_object g_root_object;
 
-void grpc_iomgr_init(grpc_exec_ctx* exec_ctx) {
+void grpc_iomgr_init() {
+  grpc_core::ExecCtx exec_ctx;
   g_shutdown = 0;
   gpr_mu_init(&g_mu);
   gpr_cv_init(&g_rcv);
-  grpc_exec_ctx_global_init();
-  grpc_executor_init(exec_ctx);
-  grpc_timer_list_init(exec_ctx);
+  grpc_executor_init();
+  grpc_timer_list_init();
   g_root_object.next = g_root_object.prev = &g_root_object;
   g_root_object.name = (char*)"root";
   grpc_network_status_init();
   grpc_iomgr_platform_init();
 }
 
-void grpc_iomgr_start(grpc_exec_ctx* exec_ctx) { grpc_timer_manager_init(); }
+void grpc_iomgr_start() { grpc_timer_manager_init(); }
 
 static size_t count_objects(void) {
   grpc_iomgr_object* obj;
@@ -76,76 +76,76 @@
   }
 }
 
-void grpc_iomgr_shutdown(grpc_exec_ctx* exec_ctx) {
+void grpc_iomgr_shutdown() {
   gpr_timespec shutdown_deadline = gpr_time_add(
       gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_seconds(10, GPR_TIMESPAN));
   gpr_timespec last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
 
-  grpc_timer_manager_shutdown();
-  grpc_iomgr_platform_flush();
-  grpc_executor_shutdown(exec_ctx);
+  {
+    grpc_timer_manager_shutdown();
+    grpc_iomgr_platform_flush();
+    grpc_executor_shutdown();
 
-  gpr_mu_lock(&g_mu);
-  g_shutdown = 1;
-  while (g_root_object.next != &g_root_object) {
-    if (gpr_time_cmp(
-            gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), last_warning_time),
-            gpr_time_from_seconds(1, GPR_TIMESPAN)) >= 0) {
+    gpr_mu_lock(&g_mu);
+    g_shutdown = 1;
+    while (g_root_object.next != &g_root_object) {
+      if (gpr_time_cmp(
+              gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), last_warning_time),
+              gpr_time_from_seconds(1, GPR_TIMESPAN)) >= 0) {
+        if (g_root_object.next != &g_root_object) {
+          gpr_log(GPR_DEBUG,
+                  "Waiting for %" PRIuPTR " iomgr objects to be destroyed",
+                  count_objects());
+        }
+        last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
+      }
+      grpc_core::ExecCtx::Get()->SetNowIomgrShutdown();
+      if (grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED) {
+        gpr_mu_unlock(&g_mu);
+        grpc_core::ExecCtx::Get()->Flush();
+        grpc_iomgr_platform_flush();
+        gpr_mu_lock(&g_mu);
+        continue;
+      }
       if (g_root_object.next != &g_root_object) {
-        gpr_log(GPR_DEBUG,
-                "Waiting for %" PRIuPTR " iomgr objects to be destroyed",
-                count_objects());
-      }
-      last_warning_time = gpr_now(GPR_CLOCK_REALTIME);
-    }
-    exec_ctx->now_is_valid = true;
-    exec_ctx->now = GRPC_MILLIS_INF_FUTURE;
-    if (grpc_timer_check(exec_ctx, nullptr) == GRPC_TIMERS_FIRED) {
-      gpr_mu_unlock(&g_mu);
-      grpc_exec_ctx_flush(exec_ctx);
-      grpc_iomgr_platform_flush();
-      gpr_mu_lock(&g_mu);
-      continue;
-    }
-    if (g_root_object.next != &g_root_object) {
-      if (grpc_iomgr_abort_on_leaks()) {
-        gpr_log(GPR_DEBUG,
-                "Failed to free %" PRIuPTR
-                " iomgr objects before shutdown deadline: "
-                "memory leaks are likely",
-                count_objects());
-        dump_objects("LEAKED");
-        abort();
-      }
-      gpr_timespec short_deadline =
-          gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
-                       gpr_time_from_millis(100, GPR_TIMESPAN));
-      if (gpr_cv_wait(&g_rcv, &g_mu, short_deadline)) {
-        if (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), shutdown_deadline) > 0) {
-          if (g_root_object.next != &g_root_object) {
-            gpr_log(GPR_DEBUG,
-                    "Failed to free %" PRIuPTR
-                    " iomgr objects before shutdown deadline: "
-                    "memory leaks are likely",
-                    count_objects());
-            dump_objects("LEAKED");
+        if (grpc_iomgr_abort_on_leaks()) {
+          gpr_log(GPR_DEBUG,
+                  "Failed to free %" PRIuPTR
+                  " iomgr objects before shutdown deadline: "
+                  "memory leaks are likely",
+                  count_objects());
+          dump_objects("LEAKED");
+          abort();
+        }
+        gpr_timespec short_deadline =
+            gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
+                         gpr_time_from_millis(100, GPR_TIMESPAN));
+        if (gpr_cv_wait(&g_rcv, &g_mu, short_deadline)) {
+          if (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), shutdown_deadline) >
+              0) {
+            if (g_root_object.next != &g_root_object) {
+              gpr_log(GPR_DEBUG,
+                      "Failed to free %" PRIuPTR
+                      " iomgr objects before shutdown deadline: "
+                      "memory leaks are likely",
+                      count_objects());
+              dump_objects("LEAKED");
+            }
+            break;
           }
-          break;
         }
       }
     }
+    gpr_mu_unlock(&g_mu);
+    grpc_timer_list_shutdown();
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  gpr_mu_unlock(&g_mu);
-
-  grpc_timer_list_shutdown(exec_ctx);
-  grpc_exec_ctx_flush(exec_ctx);
 
   /* ensure all threads have left g_mu */
   gpr_mu_lock(&g_mu);
   gpr_mu_unlock(&g_mu);
 
   grpc_iomgr_platform_shutdown();
-  grpc_exec_ctx_global_shutdown();
   grpc_network_status_shutdown();
   gpr_mu_destroy(&g_mu);
   gpr_cv_destroy(&g_rcv);
diff --git a/src/core/lib/iomgr/iomgr.h b/src/core/lib/iomgr/iomgr.h
index 2f00c03..3f238c6 100644
--- a/src/core/lib/iomgr/iomgr.h
+++ b/src/core/lib/iomgr/iomgr.h
@@ -23,13 +23,13 @@
 #include "src/core/lib/iomgr/port.h"
 
 /** Initializes the iomgr. */
-void grpc_iomgr_init(grpc_exec_ctx* exec_ctx);
+void grpc_iomgr_init();
 
 /** Starts any background threads for iomgr. */
-void grpc_iomgr_start(grpc_exec_ctx* exec_ctx);
+void grpc_iomgr_start();
 
 /** Signals the intention to shutdown the iomgr. Expects to be able to flush
  * exec_ctx. */
-void grpc_iomgr_shutdown(grpc_exec_ctx* exec_ctx);
+void grpc_iomgr_shutdown();
 
 #endif /* GRPC_CORE_LIB_IOMGR_IOMGR_H */
diff --git a/src/core/lib/iomgr/iomgr_uv.cc b/src/core/lib/iomgr/iomgr_uv.cc
index b8a10f2..9614c2e 100644
--- a/src/core/lib/iomgr/iomgr_uv.cc
+++ b/src/core/lib/iomgr/iomgr_uv.cc
@@ -29,12 +29,11 @@
 gpr_thd_id g_init_thread;
 
 void grpc_iomgr_platform_init(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_pollset_global_init();
 
-  grpc_executor_set_threading(&exec_ctx, false);
+  grpc_executor_set_threading(false);
   g_init_thread = gpr_thd_currentid();
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 void grpc_iomgr_platform_flush(void) {}
 void grpc_iomgr_platform_shutdown(void) { grpc_pollset_global_shutdown(); }
diff --git a/src/core/lib/iomgr/lockfree_event.cc b/src/core/lib/iomgr/lockfree_event.cc
index f0e798e..7b194e3 100644
--- a/src/core/lib/iomgr/lockfree_event.cc
+++ b/src/core/lib/iomgr/lockfree_event.cc
@@ -85,7 +85,7 @@
                                    kShutdownBit /* shutdown, no error */));
 }
 
-void LockfreeEvent::NotifyOn(grpc_exec_ctx* exec_ctx, grpc_closure* closure) {
+void LockfreeEvent::NotifyOn(grpc_closure* closure) {
   while (true) {
     gpr_atm curr = gpr_atm_no_barrier_load(&state_);
     if (grpc_polling_trace.enabled()) {
@@ -118,7 +118,7 @@
            closure when transitioning out of CLOSURE_NO_READY state (i.e there
            is no other code that needs to 'happen-after' this) */
         if (gpr_atm_no_barrier_cas(&state_, kClosureReady, kClosureNotReady)) {
-          GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+          GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
           return; /* Successful. Return */
         }
 
@@ -131,7 +131,7 @@
            schedule the closure with the shutdown error */
         if ((curr & kShutdownBit) > 0) {
           grpc_error* shutdown_err = (grpc_error*)(curr & ~kShutdownBit);
-          GRPC_CLOSURE_SCHED(exec_ctx, closure,
+          GRPC_CLOSURE_SCHED(closure,
                              GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                                  "FD Shutdown", &shutdown_err, 1));
           return;
@@ -149,8 +149,7 @@
   GPR_UNREACHABLE_CODE(return );
 }
 
-bool LockfreeEvent::SetShutdown(grpc_exec_ctx* exec_ctx,
-                                grpc_error* shutdown_err) {
+bool LockfreeEvent::SetShutdown(grpc_error* shutdown_err) {
   gpr_atm new_state = (gpr_atm)shutdown_err | kShutdownBit;
 
   while (true) {
@@ -184,7 +183,7 @@
            happens-after on that edge), and a release to pair with anything
            loading the shutdown state. */
         if (gpr_atm_full_cas(&state_, curr, new_state)) {
-          GRPC_CLOSURE_SCHED(exec_ctx, (grpc_closure*)curr,
+          GRPC_CLOSURE_SCHED((grpc_closure*)curr,
                              GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                                  "FD Shutdown", &shutdown_err, 1));
           return true;
@@ -200,7 +199,7 @@
   GPR_UNREACHABLE_CODE(return false);
 }
 
-void LockfreeEvent::SetReady(grpc_exec_ctx* exec_ctx) {
+void LockfreeEvent::SetReady() {
   while (true) {
     gpr_atm curr = gpr_atm_no_barrier_load(&state_);
 
@@ -234,7 +233,7 @@
            spurious set_ready; release pairs with this or the acquire in
            notify_on (or set_shutdown) */
         else if (gpr_atm_full_cas(&state_, curr, kClosureNotReady)) {
-          GRPC_CLOSURE_SCHED(exec_ctx, (grpc_closure*)curr, GRPC_ERROR_NONE);
+          GRPC_CLOSURE_SCHED((grpc_closure*)curr, GRPC_ERROR_NONE);
           return;
         }
         /* else the state changed again (only possible by either a racing
diff --git a/src/core/lib/iomgr/lockfree_event.h b/src/core/lib/iomgr/lockfree_event.h
index aec67a3..3bd3fd7 100644
--- a/src/core/lib/iomgr/lockfree_event.h
+++ b/src/core/lib/iomgr/lockfree_event.h
@@ -44,9 +44,9 @@
     return (gpr_atm_no_barrier_load(&state_) & kShutdownBit) != 0;
   }
 
-  void NotifyOn(grpc_exec_ctx* exec_ctx, grpc_closure* closure);
-  bool SetShutdown(grpc_exec_ctx* exec_ctx, grpc_error* error);
-  void SetReady(grpc_exec_ctx* exec_ctx);
+  void NotifyOn(grpc_closure* closure);
+  bool SetShutdown(grpc_error* error);
+  void SetReady();
 
  private:
   enum State { kClosureNotReady = 0, kClosureReady = 2, kShutdownBit = 1 };
diff --git a/src/core/lib/iomgr/polling_entity.cc b/src/core/lib/iomgr/polling_entity.cc
index 0ee4ea1..126f6f4 100644
--- a/src/core/lib/iomgr/polling_entity.cc
+++ b/src/core/lib/iomgr/polling_entity.cc
@@ -56,32 +56,28 @@
   return pollent->tag == GRPC_POLLS_NONE;
 }
 
-void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                            grpc_polling_entity* pollent,
+void grpc_polling_entity_add_to_pollset_set(grpc_polling_entity* pollent,
                                             grpc_pollset_set* pss_dst) {
   if (pollent->tag == GRPC_POLLS_POLLSET) {
     GPR_ASSERT(pollent->pollent.pollset != nullptr);
-    grpc_pollset_set_add_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
+    grpc_pollset_set_add_pollset(pss_dst, pollent->pollent.pollset);
   } else if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     GPR_ASSERT(pollent->pollent.pollset_set != nullptr);
-    grpc_pollset_set_add_pollset_set(exec_ctx, pss_dst,
-                                     pollent->pollent.pollset_set);
+    grpc_pollset_set_add_pollset_set(pss_dst, pollent->pollent.pollset_set);
   } else {
     gpr_log(GPR_ERROR, "Invalid grpc_polling_entity tag '%d'", pollent->tag);
     abort();
   }
 }
 
-void grpc_polling_entity_del_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                              grpc_polling_entity* pollent,
+void grpc_polling_entity_del_from_pollset_set(grpc_polling_entity* pollent,
                                               grpc_pollset_set* pss_dst) {
   if (pollent->tag == GRPC_POLLS_POLLSET) {
     GPR_ASSERT(pollent->pollent.pollset != nullptr);
-    grpc_pollset_set_del_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
+    grpc_pollset_set_del_pollset(pss_dst, pollent->pollent.pollset);
   } else if (pollent->tag == GRPC_POLLS_POLLSET_SET) {
     GPR_ASSERT(pollent->pollent.pollset_set != nullptr);
-    grpc_pollset_set_del_pollset_set(exec_ctx, pss_dst,
-                                     pollent->pollent.pollset_set);
+    grpc_pollset_set_del_pollset_set(pss_dst, pollent->pollent.pollset_set);
   } else {
     gpr_log(GPR_ERROR, "Invalid grpc_polling_entity tag '%d'", pollent->tag);
     abort();
diff --git a/src/core/lib/iomgr/polling_entity.h b/src/core/lib/iomgr/polling_entity.h
index dbe579e..0102d32 100644
--- a/src/core/lib/iomgr/polling_entity.h
+++ b/src/core/lib/iomgr/polling_entity.h
@@ -55,14 +55,12 @@
 
 /** Add the pollset or pollset_set in \a pollent to the destination pollset_set
  * \a * pss_dst */
-void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                            grpc_polling_entity* pollent,
+void grpc_polling_entity_add_to_pollset_set(grpc_polling_entity* pollent,
                                             grpc_pollset_set* pss_dst);
 
 /** Delete the pollset or pollset_set in \a pollent from the destination
  * pollset_set \a * pss_dst */
-void grpc_polling_entity_del_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                              grpc_polling_entity* pollent,
+void grpc_polling_entity_del_from_pollset_set(grpc_polling_entity* pollent,
                                               grpc_pollset_set* pss_dst);
 
 #endif /* GRPC_CORE_LIB_IOMGR_POLLING_ENTITY_H */
diff --git a/src/core/lib/iomgr/pollset.h b/src/core/lib/iomgr/pollset.h
index d5d78f3..6bb3cd3 100644
--- a/src/core/lib/iomgr/pollset.h
+++ b/src/core/lib/iomgr/pollset.h
@@ -42,9 +42,8 @@
 void grpc_pollset_init(grpc_pollset* pollset, gpr_mu** mu);
 /* Begin shutting down the pollset, and call closure when done.
  * pollset's mutex must be held */
-void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure);
-void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset);
+void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure);
+void grpc_pollset_destroy(grpc_pollset* pollset);
 
 /* Do some work on a pollset.
    May involve invoking asynchronous callbacks, or actually polling file
@@ -68,13 +67,13 @@
    May call grpc_closure_list_run on grpc_closure_list, without holding the
    pollset
    lock */
-grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker,
                               grpc_millis deadline) GRPC_MUST_USE_RESULT;
 
 /* Break one polling thread out of polling work for this pollset.
    If specific_worker is non-NULL, then kick that worker. */
-grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_kick(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker)
     GRPC_MUST_USE_RESULT;
 
diff --git a/src/core/lib/iomgr/pollset_set.h b/src/core/lib/iomgr/pollset_set.h
index 089c15c..a94d0af 100644
--- a/src/core/lib/iomgr/pollset_set.h
+++ b/src/core/lib/iomgr/pollset_set.h
@@ -29,19 +29,14 @@
 typedef struct grpc_pollset_set grpc_pollset_set;
 
 grpc_pollset_set* grpc_pollset_set_create(void);
-void grpc_pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set);
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set);
+void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset);
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset);
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item);
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item);
 
 #endif /* GRPC_CORE_LIB_IOMGR_POLLSET_SET_H */
diff --git a/src/core/lib/iomgr/pollset_set_uv.cc b/src/core/lib/iomgr/pollset_set_uv.cc
index 90186ed..ac5dade 100644
--- a/src/core/lib/iomgr/pollset_set_uv.cc
+++ b/src/core/lib/iomgr/pollset_set_uv.cc
@@ -26,23 +26,18 @@
   return (grpc_pollset_set*)((intptr_t)0xdeafbeef);
 }
 
-void grpc_pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set) {}
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {}
 
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {}
 
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {}
 
 #endif /* GRPC_UV */
diff --git a/src/core/lib/iomgr/pollset_set_windows.cc b/src/core/lib/iomgr/pollset_set_windows.cc
index 2105a47..85edc9d 100644
--- a/src/core/lib/iomgr/pollset_set_windows.cc
+++ b/src/core/lib/iomgr/pollset_set_windows.cc
@@ -27,23 +27,18 @@
   return (grpc_pollset_set*)((intptr_t)0xdeafbeef);
 }
 
-void grpc_pollset_set_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_pollset_set* pollset_set) {}
+void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {}
 
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {}
 
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_pollset_set* bag,
+void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {}
 
 #endif /* GRPC_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/pollset_uv.cc b/src/core/lib/iomgr/pollset_uv.cc
index 16132f3..d9e5ad8 100644
--- a/src/core/lib/iomgr/pollset_uv.cc
+++ b/src/core/lib/iomgr/pollset_uv.cc
@@ -88,8 +88,7 @@
   pollset->shutting_down = 0;
 }
 
-void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure) {
+void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   GPR_ASSERT(!pollset->shutting_down);
   GRPC_UV_ASSERT_SAME_THREAD();
   pollset->shutting_down = 1;
@@ -100,10 +99,10 @@
     // kick the loop once
     uv_timer_start(dummy_uv_handle, dummy_timer_cb, 0, 0);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
 }
 
-void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {
+void grpc_pollset_destroy(grpc_pollset* pollset) {
   GRPC_UV_ASSERT_SAME_THREAD();
   uv_close((uv_handle_t*)pollset->timer, timer_close_cb);
   // timer.data is a boolean indicating that the timer has finished closing
@@ -115,14 +114,14 @@
   }
 }
 
-grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker_hdl,
                               grpc_millis deadline) {
   uint64_t timeout;
   GRPC_UV_ASSERT_SAME_THREAD();
   gpr_mu_unlock(&grpc_polling_mu);
   if (grpc_pollset_work_run_loop) {
-    grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+    grpc_millis now = grpc_core::ExecCtx::Get()->Now();
     if (deadline >= now) {
       timeout = deadline - now;
     } else {
@@ -140,14 +139,14 @@
       uv_run(uv_default_loop(), UV_RUN_NOWAIT);
     }
   }
-  if (!grpc_closure_list_empty(exec_ctx->closure_list)) {
-    grpc_exec_ctx_flush(exec_ctx);
+  if (!grpc_closure_list_empty(*grpc_core::ExecCtx::Get()->closure_list())) {
+    grpc_core::ExecCtx::Get()->Flush();
   }
   gpr_mu_lock(&grpc_polling_mu);
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_kick(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker) {
   GRPC_UV_ASSERT_SAME_THREAD();
   uv_timer_start(dummy_uv_handle, dummy_timer_cb, 0, 0);
diff --git a/src/core/lib/iomgr/pollset_windows.cc b/src/core/lib/iomgr/pollset_windows.cc
index 95dd7d7..6ef949a 100644
--- a/src/core/lib/iomgr/pollset_windows.cc
+++ b/src/core/lib/iomgr/pollset_windows.cc
@@ -92,20 +92,19 @@
           &pollset->root_worker;
 }
 
-void grpc_pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                           grpc_closure* closure) {
+void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
   pollset->shutting_down = 1;
-  grpc_pollset_kick(exec_ctx, pollset, GRPC_POLLSET_KICK_BROADCAST);
+  grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!pollset->is_iocp_worker) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
   } else {
     pollset->on_shutdown = closure;
   }
 }
 
-void grpc_pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset) {}
+void grpc_pollset_destroy(grpc_pollset* pollset) {}
 
-grpc_error* grpc_pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker_hdl,
                               grpc_millis deadline) {
   grpc_pollset_worker worker;
@@ -126,8 +125,8 @@
       pollset->is_iocp_worker = 1;
       g_active_poller = &worker;
       gpr_mu_unlock(&grpc_polling_mu);
-      grpc_iocp_work(exec_ctx, deadline);
-      grpc_exec_ctx_flush(exec_ctx);
+      grpc_iocp_work(deadline);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(&grpc_polling_mu);
       pollset->is_iocp_worker = 0;
       g_active_poller = NULL;
@@ -145,7 +144,7 @@
       }
 
       if (pollset->shutting_down && pollset->on_shutdown != NULL) {
-        GRPC_CLOSURE_SCHED(exec_ctx, pollset->on_shutdown, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(pollset->on_shutdown, GRPC_ERROR_NONE);
         pollset->on_shutdown = NULL;
       }
       goto done;
@@ -158,18 +157,18 @@
     while (!worker.kicked) {
       if (gpr_cv_wait(&worker.cv, &grpc_polling_mu,
                       grpc_millis_to_timespec(deadline, GPR_CLOCK_REALTIME))) {
-        grpc_exec_ctx_invalidate_now(exec_ctx);
+        grpc_core::ExecCtx::Get()->InvalidateNow();
         break;
       }
-      grpc_exec_ctx_invalidate_now(exec_ctx);
+      grpc_core::ExecCtx::Get()->InvalidateNow();
     }
   } else {
     pollset->kicked_without_pollers = 0;
   }
 done:
-  if (!grpc_closure_list_empty(exec_ctx->closure_list)) {
+  if (!grpc_closure_list_empty(*grpc_core::ExecCtx::Get()->closure_list())) {
     gpr_mu_unlock(&grpc_polling_mu);
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(&grpc_polling_mu);
   }
   if (added_worker) {
@@ -181,7 +180,7 @@
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
+grpc_error* grpc_pollset_kick(grpc_pollset* p,
                               grpc_pollset_worker* specific_worker) {
   if (specific_worker != NULL) {
     if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
@@ -209,7 +208,7 @@
     specific_worker =
         pop_front_worker(&p->root_worker, GRPC_POLLSET_WORKER_LINK_POLLSET);
     if (specific_worker != NULL) {
-      grpc_pollset_kick(exec_ctx, p, specific_worker);
+      grpc_pollset_kick(p, specific_worker);
     } else if (p->is_iocp_worker) {
       grpc_iocp_kick();
     } else {
diff --git a/src/core/lib/iomgr/resolve_address.h b/src/core/lib/iomgr/resolve_address.h
index 5105020..12fc2ed 100644
--- a/src/core/lib/iomgr/resolve_address.h
+++ b/src/core/lib/iomgr/resolve_address.h
@@ -38,8 +38,7 @@
 /* Asynchronously resolve addr. Use default_port if a port isn't designated
    in addr, otherwise use the port in addr. */
 /* TODO(ctiller): add a timeout here */
-extern void (*grpc_resolve_address)(grpc_exec_ctx* exec_ctx, const char* addr,
-                                    const char* default_port,
+extern void (*grpc_resolve_address)(const char* addr, const char* default_port,
                                     grpc_pollset_set* interested_parties,
                                     grpc_closure* on_done,
                                     grpc_resolved_addresses** addresses);
diff --git a/src/core/lib/iomgr/resolve_address_posix.cc b/src/core/lib/iomgr/resolve_address_posix.cc
index fb5fa9d..cc3d4fd 100644
--- a/src/core/lib/iomgr/resolve_address_posix.cc
+++ b/src/core/lib/iomgr/resolve_address_posix.cc
@@ -42,6 +42,7 @@
 static grpc_error* blocking_resolve_address_impl(
     const char* name, const char* default_port,
     grpc_resolved_addresses** addresses) {
+  grpc_core::ExecCtx exec_ctx;
   struct addrinfo hints;
   struct addrinfo *result = nullptr, *resp;
   char* host;
@@ -81,7 +82,7 @@
 
   GRPC_SCHEDULING_START_BLOCKING_REGION;
   s = getaddrinfo(host, port, &hints, &result);
-  GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX;
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
 
   if (s != 0) {
     /* Retry if well-known service name is recognized */
@@ -90,7 +91,7 @@
       if (strcmp(port, svc[i][0]) == 0) {
         GRPC_SCHEDULING_START_BLOCKING_REGION;
         s = getaddrinfo(host, svc[i][1], &hints, &result);
-        GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX;
+        GRPC_SCHEDULING_END_BLOCKING_REGION;
         break;
       }
     }
@@ -152,12 +153,10 @@
 
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
-static void do_request_thread(grpc_exec_ctx* exec_ctx, void* rp,
-                              grpc_error* error) {
+static void do_request_thread(void* rp, grpc_error* error) {
   request* r = (request*)rp;
-  GRPC_CLOSURE_SCHED(
-      exec_ctx, r->on_done,
-      grpc_blocking_resolve_address(r->name, r->default_port, r->addrs_out));
+  GRPC_CLOSURE_SCHED(r->on_done, grpc_blocking_resolve_address(
+                                     r->name, r->default_port, r->addrs_out));
   gpr_free(r->name);
   gpr_free(r->default_port);
   gpr_free(r);
@@ -170,8 +169,7 @@
   gpr_free(addrs);
 }
 
-static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
-                                 const char* default_port,
+static void resolve_address_impl(const char* name, const char* default_port,
                                  grpc_pollset_set* interested_parties,
                                  grpc_closure* on_done,
                                  grpc_resolved_addresses** addrs) {
@@ -182,11 +180,11 @@
   r->default_port = gpr_strdup(default_port);
   r->on_done = on_done;
   r->addrs_out = addrs;
-  GRPC_CLOSURE_SCHED(exec_ctx, &r->request_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&r->request_closure, GRPC_ERROR_NONE);
 }
 
 void (*grpc_resolve_address)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addrs) = resolve_address_impl;
 
diff --git a/src/core/lib/iomgr/resolve_address_uv.cc b/src/core/lib/iomgr/resolve_address_uv.cc
index 6d09fd1..3eab04f 100644
--- a/src/core/lib/iomgr/resolve_address_uv.cc
+++ b/src/core/lib/iomgr/resolve_address_uv.cc
@@ -114,7 +114,7 @@
 static void getaddrinfo_callback(uv_getaddrinfo_t* req, int status,
                                  struct addrinfo* res) {
   request* r = (request*)req->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_error* error;
   int retry_status;
   char* port = r->port;
@@ -130,8 +130,8 @@
   /* Either no retry was attempted, or the retry failed. Either way, the
      original error probably has more interesting information */
   error = handle_addrinfo_result(status, res, r->addresses);
-  GRPC_CLOSURE_SCHED(&exec_ctx, r->on_done, error);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CLOSURE_SCHED(r->on_done, error);
+
   gpr_free(r->hints);
   gpr_free(r->host);
   gpr_free(r->port);
@@ -224,8 +224,7 @@
   gpr_free(addrs);
 }
 
-static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
-                                 const char* default_port,
+static void resolve_address_impl(const char* name, const char* default_port,
                                  grpc_pollset_set* interested_parties,
                                  grpc_closure* on_done,
                                  grpc_resolved_addresses** addrs) {
@@ -239,7 +238,7 @@
   GRPC_UV_ASSERT_SAME_THREAD();
   err = try_split_host_port(name, default_port, &host, &port);
   if (err != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, on_done, err);
+    GRPC_CLOSURE_SCHED(on_done, err);
     gpr_free(host);
     gpr_free(port);
     return;
@@ -268,7 +267,7 @@
     err = GRPC_ERROR_CREATE_FROM_STATIC_STRING("getaddrinfo failed");
     err = grpc_error_set_str(err, GRPC_ERROR_STR_OS_ERROR,
                              grpc_slice_from_static_string(uv_strerror(s)));
-    GRPC_CLOSURE_SCHED(exec_ctx, on_done, err);
+    GRPC_CLOSURE_SCHED(on_done, err);
     gpr_free(r);
     gpr_free(req);
     gpr_free(hints);
@@ -278,7 +277,7 @@
 }
 
 void (*grpc_resolve_address)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addrs) = resolve_address_impl;
 
diff --git a/src/core/lib/iomgr/resolve_address_windows.cc b/src/core/lib/iomgr/resolve_address_windows.cc
index d9fc17a..ccb1dae 100644
--- a/src/core/lib/iomgr/resolve_address_windows.cc
+++ b/src/core/lib/iomgr/resolve_address_windows.cc
@@ -51,6 +51,7 @@
 static grpc_error* blocking_resolve_address_impl(
     const char* name, const char* default_port,
     grpc_resolved_addresses** addresses) {
+  grpc_core::ExecCtx exec_ctx;
   struct addrinfo hints;
   struct addrinfo *result = NULL, *resp;
   char* host;
@@ -87,7 +88,7 @@
 
   GRPC_SCHEDULING_START_BLOCKING_REGION;
   s = getaddrinfo(host, port, &hints, &result);
-  GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX;
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
   if (s != 0) {
     error = GRPC_WSA_ERROR(WSAGetLastError(), "getaddrinfo");
     goto done;
@@ -132,8 +133,7 @@
 
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
-static void do_request_thread(grpc_exec_ctx* exec_ctx, void* rp,
-                              grpc_error* error) {
+static void do_request_thread(void* rp, grpc_error* error) {
   request* r = (request*)rp;
   if (error == GRPC_ERROR_NONE) {
     error =
@@ -141,7 +141,7 @@
   } else {
     GRPC_ERROR_REF(error);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, r->on_done, error);
+  GRPC_CLOSURE_SCHED(r->on_done, error);
   gpr_free(r->name);
   gpr_free(r->default_port);
   gpr_free(r);
@@ -154,8 +154,7 @@
   gpr_free(addrs);
 }
 
-static void resolve_address_impl(grpc_exec_ctx* exec_ctx, const char* name,
-                                 const char* default_port,
+static void resolve_address_impl(const char* name, const char* default_port,
                                  grpc_pollset_set* interested_parties,
                                  grpc_closure* on_done,
                                  grpc_resolved_addresses** addresses) {
@@ -166,11 +165,11 @@
   r->default_port = gpr_strdup(default_port);
   r->on_done = on_done;
   r->addresses = addresses;
-  GRPC_CLOSURE_SCHED(exec_ctx, &r->request_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&r->request_closure, GRPC_ERROR_NONE);
 }
 
 void (*grpc_resolve_address)(
-    grpc_exec_ctx* exec_ctx, const char* name, const char* default_port,
+    const char* name, const char* default_port,
     grpc_pollset_set* interested_parties, grpc_closure* on_done,
     grpc_resolved_addresses** addresses) = resolve_address_impl;
 
diff --git a/src/core/lib/iomgr/resource_quota.cc b/src/core/lib/iomgr/resource_quota.cc
index ccd8d9f..cabe28e 100644
--- a/src/core/lib/iomgr/resource_quota.cc
+++ b/src/core/lib/iomgr/resource_quota.cc
@@ -154,8 +154,7 @@
   char* name;
 };
 
-static void ru_unref_by(grpc_exec_ctx* exec_ctx,
-                        grpc_resource_user* resource_user, gpr_atm amount);
+static void ru_unref_by(grpc_resource_user* resource_user, gpr_atm amount);
 
 /*******************************************************************************
  * list management
@@ -239,35 +238,31 @@
  * resource quota state machine
  */
 
-static bool rq_alloc(grpc_exec_ctx* exec_ctx,
-                     grpc_resource_quota* resource_quota);
+static bool rq_alloc(grpc_resource_quota* resource_quota);
 static bool rq_reclaim_from_per_user_free_pool(
-    grpc_exec_ctx* exec_ctx, grpc_resource_quota* resource_quota);
-static bool rq_reclaim(grpc_exec_ctx* exec_ctx,
-                       grpc_resource_quota* resource_quota, bool destructive);
+    grpc_resource_quota* resource_quota);
+static bool rq_reclaim(grpc_resource_quota* resource_quota, bool destructive);
 
-static void rq_step(grpc_exec_ctx* exec_ctx, void* rq, grpc_error* error) {
+static void rq_step(void* rq, grpc_error* error) {
   grpc_resource_quota* resource_quota = (grpc_resource_quota*)rq;
   resource_quota->step_scheduled = false;
   do {
-    if (rq_alloc(exec_ctx, resource_quota)) goto done;
-  } while (rq_reclaim_from_per_user_free_pool(exec_ctx, resource_quota));
+    if (rq_alloc(resource_quota)) goto done;
+  } while (rq_reclaim_from_per_user_free_pool(resource_quota));
 
-  if (!rq_reclaim(exec_ctx, resource_quota, false)) {
-    rq_reclaim(exec_ctx, resource_quota, true);
+  if (!rq_reclaim(resource_quota, false)) {
+    rq_reclaim(resource_quota, true);
   }
 
 done:
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 }
 
-static void rq_step_sched(grpc_exec_ctx* exec_ctx,
-                          grpc_resource_quota* resource_quota) {
+static void rq_step_sched(grpc_resource_quota* resource_quota) {
   if (resource_quota->step_scheduled) return;
   resource_quota->step_scheduled = true;
   grpc_resource_quota_ref_internal(resource_quota);
-  GRPC_CLOSURE_SCHED(exec_ctx, &resource_quota->rq_step_closure,
-                     GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(&resource_quota->rq_step_closure, GRPC_ERROR_NONE);
 }
 
 /* update the atomically available resource estimate - use no barriers since
@@ -286,8 +281,7 @@
 }
 
 /* returns true if all allocations are completed */
-static bool rq_alloc(grpc_exec_ctx* exec_ctx,
-                     grpc_resource_quota* resource_quota) {
+static bool rq_alloc(grpc_resource_quota* resource_quota) {
   grpc_resource_user* resource_user;
   while ((resource_user = rulist_pop_head(resource_quota,
                                           GRPC_RULIST_AWAITING_ALLOCATION))) {
@@ -307,9 +301,9 @@
       int64_t aborted_allocations = resource_user->outstanding_allocations;
       resource_user->outstanding_allocations = 0;
       resource_user->free_pool += aborted_allocations;
-      GRPC_CLOSURE_LIST_SCHED(exec_ctx, &resource_user->on_allocated);
+      GRPC_CLOSURE_LIST_SCHED(&resource_user->on_allocated);
       gpr_mu_unlock(&resource_user->mu);
-      ru_unref_by(exec_ctx, resource_user, (gpr_atm)aborted_allocations);
+      ru_unref_by(resource_user, (gpr_atm)aborted_allocations);
       continue;
     }
     if (resource_user->free_pool < 0 &&
@@ -333,7 +327,7 @@
     if (resource_user->free_pool >= 0) {
       resource_user->allocating = false;
       resource_user->outstanding_allocations = 0;
-      GRPC_CLOSURE_LIST_SCHED(exec_ctx, &resource_user->on_allocated);
+      GRPC_CLOSURE_LIST_SCHED(&resource_user->on_allocated);
       gpr_mu_unlock(&resource_user->mu);
     } else {
       rulist_add_head(resource_user, GRPC_RULIST_AWAITING_ALLOCATION);
@@ -346,7 +340,7 @@
 
 /* returns true if any memory could be reclaimed from buffers */
 static bool rq_reclaim_from_per_user_free_pool(
-    grpc_exec_ctx* exec_ctx, grpc_resource_quota* resource_quota) {
+    grpc_resource_quota* resource_quota) {
   grpc_resource_user* resource_user;
   while ((resource_user = rulist_pop_head(resource_quota,
                                           GRPC_RULIST_NON_EMPTY_FREE_POOL))) {
@@ -373,8 +367,7 @@
 }
 
 /* returns true if reclamation is proceeding */
-static bool rq_reclaim(grpc_exec_ctx* exec_ctx,
-                       grpc_resource_quota* resource_quota, bool destructive) {
+static bool rq_reclaim(grpc_resource_quota* resource_quota, bool destructive) {
   if (resource_quota->reclaiming) return true;
   grpc_rulist list = destructive ? GRPC_RULIST_RECLAIMER_DESTRUCTIVE
                                  : GRPC_RULIST_RECLAIMER_BENIGN;
@@ -392,7 +385,7 @@
   resource_quota->debug_only_last_reclaimer_resource_user = resource_user;
   resource_quota->debug_only_last_initiated_reclaimer = c;
   resource_user->reclaimers[destructive] = nullptr;
-  GRPC_CLOSURE_RUN(exec_ctx, c, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_RUN(c, GRPC_ERROR_NONE);
   return true;
 }
 
@@ -412,10 +405,10 @@
   gpr_ref(&rc->refs);
 }
 
-static void ru_slice_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void ru_slice_unref(void* p) {
   ru_slice_refcount* rc = (ru_slice_refcount*)p;
   if (gpr_unref(&rc->refs)) {
-    grpc_resource_user_free(exec_ctx, rc->resource_user, rc->size);
+    grpc_resource_user_free(rc->resource_user, rc->size);
     gpr_free(rc);
   }
 }
@@ -445,61 +438,57 @@
  * the combiner
  */
 
-static void ru_allocate(grpc_exec_ctx* exec_ctx, void* ru, grpc_error* error) {
+static void ru_allocate(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
   if (rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_AWAITING_ALLOCATION)) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
   rulist_add_tail(resource_user, GRPC_RULIST_AWAITING_ALLOCATION);
 }
 
-static void ru_add_to_free_pool(grpc_exec_ctx* exec_ctx, void* ru,
-                                grpc_error* error) {
+static void ru_add_to_free_pool(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_NON_EMPTY_FREE_POOL)) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
   rulist_add_tail(resource_user, GRPC_RULIST_NON_EMPTY_FREE_POOL);
 }
 
-static bool ru_post_reclaimer(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user,
+static bool ru_post_reclaimer(grpc_resource_user* resource_user,
                               bool destructive) {
   grpc_closure* closure = resource_user->new_reclaimers[destructive];
   GPR_ASSERT(closure != nullptr);
   resource_user->new_reclaimers[destructive] = nullptr;
   GPR_ASSERT(resource_user->reclaimers[destructive] == nullptr);
   if (gpr_atm_acq_load(&resource_user->shutdown) > 0) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_CANCELLED);
     return false;
   }
   resource_user->reclaimers[destructive] = closure;
   return true;
 }
 
-static void ru_post_benign_reclaimer(grpc_exec_ctx* exec_ctx, void* ru,
-                                     grpc_error* error) {
+static void ru_post_benign_reclaimer(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
-  if (!ru_post_reclaimer(exec_ctx, resource_user, false)) return;
+  if (!ru_post_reclaimer(resource_user, false)) return;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_NON_EMPTY_FREE_POOL) &&
       rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_RECLAIMER_BENIGN)) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
   rulist_add_tail(resource_user, GRPC_RULIST_RECLAIMER_BENIGN);
 }
 
-static void ru_post_destructive_reclaimer(grpc_exec_ctx* exec_ctx, void* ru,
-                                          grpc_error* error) {
+static void ru_post_destructive_reclaimer(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
-  if (!ru_post_reclaimer(exec_ctx, resource_user, true)) return;
+  if (!ru_post_reclaimer(resource_user, true)) return;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
@@ -508,51 +497,46 @@
                    GRPC_RULIST_RECLAIMER_BENIGN) &&
       rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_RECLAIMER_DESTRUCTIVE)) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
   rulist_add_tail(resource_user, GRPC_RULIST_RECLAIMER_DESTRUCTIVE);
 }
 
-static void ru_shutdown(grpc_exec_ctx* exec_ctx, void* ru, grpc_error* error) {
+static void ru_shutdown(void* ru, grpc_error* error) {
   if (grpc_resource_quota_trace.enabled()) {
     gpr_log(GPR_DEBUG, "RU shutdown %p", ru);
   }
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
-  GRPC_CLOSURE_SCHED(exec_ctx, resource_user->reclaimers[0],
-                     GRPC_ERROR_CANCELLED);
-  GRPC_CLOSURE_SCHED(exec_ctx, resource_user->reclaimers[1],
-                     GRPC_ERROR_CANCELLED);
+  GRPC_CLOSURE_SCHED(resource_user->reclaimers[0], GRPC_ERROR_CANCELLED);
+  GRPC_CLOSURE_SCHED(resource_user->reclaimers[1], GRPC_ERROR_CANCELLED);
   resource_user->reclaimers[0] = nullptr;
   resource_user->reclaimers[1] = nullptr;
   rulist_remove(resource_user, GRPC_RULIST_RECLAIMER_BENIGN);
   rulist_remove(resource_user, GRPC_RULIST_RECLAIMER_DESTRUCTIVE);
   if (resource_user->allocating) {
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
 }
 
-static void ru_destroy(grpc_exec_ctx* exec_ctx, void* ru, grpc_error* error) {
+static void ru_destroy(void* ru, grpc_error* error) {
   grpc_resource_user* resource_user = (grpc_resource_user*)ru;
   GPR_ASSERT(gpr_atm_no_barrier_load(&resource_user->refs) == 0);
   for (int i = 0; i < GRPC_RULIST_COUNT; i++) {
     rulist_remove(resource_user, (grpc_rulist)i);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, resource_user->reclaimers[0],
-                     GRPC_ERROR_CANCELLED);
-  GRPC_CLOSURE_SCHED(exec_ctx, resource_user->reclaimers[1],
-                     GRPC_ERROR_CANCELLED);
+  GRPC_CLOSURE_SCHED(resource_user->reclaimers[0], GRPC_ERROR_CANCELLED);
+  GRPC_CLOSURE_SCHED(resource_user->reclaimers[1], GRPC_ERROR_CANCELLED);
   if (resource_user->free_pool != 0) {
     resource_user->resource_quota->free_pool += resource_user->free_pool;
-    rq_step_sched(exec_ctx, resource_user->resource_quota);
+    rq_step_sched(resource_user->resource_quota);
   }
-  grpc_resource_quota_unref_internal(exec_ctx, resource_user->resource_quota);
+  grpc_resource_quota_unref_internal(resource_user->resource_quota);
   gpr_mu_destroy(&resource_user->mu);
   gpr_free(resource_user->name);
   gpr_free(resource_user);
 }
 
-static void ru_allocated_slices(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void ru_allocated_slices(void* arg, grpc_error* error) {
   grpc_resource_user_slice_allocator* slice_allocator =
       (grpc_resource_user_slice_allocator*)arg;
   if (error == GRPC_ERROR_NONE) {
@@ -562,7 +546,7 @@
                                                  slice_allocator->length));
     }
   }
-  GRPC_CLOSURE_RUN(exec_ctx, &slice_allocator->on_done, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(&slice_allocator->on_done, GRPC_ERROR_REF(error));
 }
 
 /*******************************************************************************
@@ -576,23 +560,22 @@
   grpc_closure closure;
 } rq_resize_args;
 
-static void rq_resize(grpc_exec_ctx* exec_ctx, void* args, grpc_error* error) {
+static void rq_resize(void* args, grpc_error* error) {
   rq_resize_args* a = (rq_resize_args*)args;
   int64_t delta = a->size - a->resource_quota->size;
   a->resource_quota->size += delta;
   a->resource_quota->free_pool += delta;
   rq_update_estimate(a->resource_quota);
-  rq_step_sched(exec_ctx, a->resource_quota);
-  grpc_resource_quota_unref_internal(exec_ctx, a->resource_quota);
+  rq_step_sched(a->resource_quota);
+  grpc_resource_quota_unref_internal(a->resource_quota);
   gpr_free(a);
 }
 
-static void rq_reclamation_done(grpc_exec_ctx* exec_ctx, void* rq,
-                                grpc_error* error) {
+static void rq_reclamation_done(void* rq, grpc_error* error) {
   grpc_resource_quota* resource_quota = (grpc_resource_quota*)rq;
   resource_quota->reclaiming = false;
-  rq_step_sched(exec_ctx, resource_quota);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  rq_step_sched(resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 }
 
 /*******************************************************************************
@@ -628,10 +611,9 @@
   return resource_quota;
 }
 
-void grpc_resource_quota_unref_internal(grpc_exec_ctx* exec_ctx,
-                                        grpc_resource_quota* resource_quota) {
+void grpc_resource_quota_unref_internal(grpc_resource_quota* resource_quota) {
   if (gpr_unref(&resource_quota->refs)) {
-    GRPC_COMBINER_UNREF(exec_ctx, resource_quota->combiner, "resource_quota");
+    GRPC_COMBINER_UNREF(resource_quota->combiner, "resource_quota");
     gpr_free(resource_quota->name);
     gpr_free(resource_quota);
   }
@@ -639,9 +621,8 @@
 
 /* Public API */
 void grpc_resource_quota_unref(grpc_resource_quota* resource_quota) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_resource_quota_unref_internal(resource_quota);
 }
 
 grpc_resource_quota* grpc_resource_quota_ref_internal(
@@ -665,15 +646,14 @@
 /* Public API */
 void grpc_resource_quota_resize(grpc_resource_quota* resource_quota,
                                 size_t size) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   rq_resize_args* a = (rq_resize_args*)gpr_malloc(sizeof(*a));
   a->resource_quota = grpc_resource_quota_ref_internal(resource_quota);
   a->size = (int64_t)size;
   gpr_atm_no_barrier_store(&resource_quota->last_size,
                            (gpr_atm)GPR_MIN((size_t)GPR_ATM_MAX, size));
   GRPC_CLOSURE_INIT(&a->closure, rq_resize, a, grpc_schedule_on_exec_ctx);
-  GRPC_CLOSURE_SCHED(&exec_ctx, &a->closure, GRPC_ERROR_NONE);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CLOSURE_SCHED(&a->closure, GRPC_ERROR_NONE);
 }
 
 size_t grpc_resource_quota_peek_size(grpc_resource_quota* resource_quota) {
@@ -704,8 +684,8 @@
   return rq;
 }
 
-static void rq_destroy(grpc_exec_ctx* exec_ctx, void* rq) {
-  grpc_resource_quota_unref_internal(exec_ctx, (grpc_resource_quota*)rq);
+static void rq_destroy(void* rq) {
+  grpc_resource_quota_unref_internal((grpc_resource_quota*)rq);
 }
 
 static int rq_cmp(void* a, void* b) { return GPR_ICMP(a, b); }
@@ -773,14 +753,12 @@
   GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&resource_user->refs, amount) != 0);
 }
 
-static void ru_unref_by(grpc_exec_ctx* exec_ctx,
-                        grpc_resource_user* resource_user, gpr_atm amount) {
+static void ru_unref_by(grpc_resource_user* resource_user, gpr_atm amount) {
   GPR_ASSERT(amount > 0);
   gpr_atm old = gpr_atm_full_fetch_add(&resource_user->refs, -amount);
   GPR_ASSERT(old >= amount);
   if (old == amount) {
-    GRPC_CLOSURE_SCHED(exec_ctx, &resource_user->destroy_closure,
-                       GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&resource_user->destroy_closure, GRPC_ERROR_NONE);
   }
 }
 
@@ -788,16 +766,13 @@
   ru_ref_by(resource_user, 1);
 }
 
-void grpc_resource_user_unref(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user) {
-  ru_unref_by(exec_ctx, resource_user, 1);
+void grpc_resource_user_unref(grpc_resource_user* resource_user) {
+  ru_unref_by(resource_user, 1);
 }
 
-void grpc_resource_user_shutdown(grpc_exec_ctx* exec_ctx,
-                                 grpc_resource_user* resource_user) {
+void grpc_resource_user_shutdown(grpc_resource_user* resource_user) {
   if (gpr_atm_full_fetch_add(&resource_user->shutdown, 1) == 0) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_CREATE(
             ru_shutdown, resource_user,
             grpc_combiner_scheduler(resource_user->resource_quota->combiner)),
@@ -805,8 +780,7 @@
   }
 }
 
-void grpc_resource_user_alloc(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user, size_t size,
+void grpc_resource_user_alloc(grpc_resource_user* resource_user, size_t size,
                               grpc_closure* optional_on_done) {
   gpr_mu_lock(&resource_user->mu);
   ru_ref_by(resource_user, (gpr_atm)size);
@@ -822,18 +796,16 @@
                              GRPC_ERROR_NONE);
     if (!resource_user->allocating) {
       resource_user->allocating = true;
-      GRPC_CLOSURE_SCHED(exec_ctx, &resource_user->allocate_closure,
-                         GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(&resource_user->allocate_closure, GRPC_ERROR_NONE);
     }
   } else {
     resource_user->outstanding_allocations -= (int64_t)size;
-    GRPC_CLOSURE_SCHED(exec_ctx, optional_on_done, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(optional_on_done, GRPC_ERROR_NONE);
   }
   gpr_mu_unlock(&resource_user->mu);
 }
 
-void grpc_resource_user_free(grpc_exec_ctx* exec_ctx,
-                             grpc_resource_user* resource_user, size_t size) {
+void grpc_resource_user_free(grpc_resource_user* resource_user, size_t size) {
   gpr_mu_lock(&resource_user->mu);
   bool was_zero_or_negative = resource_user->free_pool <= 0;
   resource_user->free_pool += (int64_t)size;
@@ -846,32 +818,29 @@
   if (is_bigger_than_zero && was_zero_or_negative &&
       !resource_user->added_to_free_pool) {
     resource_user->added_to_free_pool = true;
-    GRPC_CLOSURE_SCHED(exec_ctx, &resource_user->add_to_free_pool_closure,
+    GRPC_CLOSURE_SCHED(&resource_user->add_to_free_pool_closure,
                        GRPC_ERROR_NONE);
   }
   gpr_mu_unlock(&resource_user->mu);
-  ru_unref_by(exec_ctx, resource_user, (gpr_atm)size);
+  ru_unref_by(resource_user, (gpr_atm)size);
 }
 
-void grpc_resource_user_post_reclaimer(grpc_exec_ctx* exec_ctx,
-                                       grpc_resource_user* resource_user,
+void grpc_resource_user_post_reclaimer(grpc_resource_user* resource_user,
                                        bool destructive,
                                        grpc_closure* closure) {
   GPR_ASSERT(resource_user->new_reclaimers[destructive] == nullptr);
   resource_user->new_reclaimers[destructive] = closure;
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     &resource_user->post_reclaimer_closure[destructive],
+  GRPC_CLOSURE_SCHED(&resource_user->post_reclaimer_closure[destructive],
                      GRPC_ERROR_NONE);
 }
 
-void grpc_resource_user_finish_reclamation(grpc_exec_ctx* exec_ctx,
-                                           grpc_resource_user* resource_user) {
+void grpc_resource_user_finish_reclamation(grpc_resource_user* resource_user) {
   if (grpc_resource_quota_trace.enabled()) {
     gpr_log(GPR_DEBUG, "RQ %s %s: reclamation complete",
             resource_user->resource_quota->name, resource_user->name);
   }
   GRPC_CLOSURE_SCHED(
-      exec_ctx, &resource_user->resource_quota->rq_reclamation_done_closure,
+      &resource_user->resource_quota->rq_reclamation_done_closure,
       GRPC_ERROR_NONE);
 }
 
@@ -886,12 +855,11 @@
 }
 
 void grpc_resource_user_alloc_slices(
-    grpc_exec_ctx* exec_ctx,
     grpc_resource_user_slice_allocator* slice_allocator, size_t length,
     size_t count, grpc_slice_buffer* dest) {
   slice_allocator->length = length;
   slice_allocator->count = count;
   slice_allocator->dest = dest;
-  grpc_resource_user_alloc(exec_ctx, slice_allocator->resource_user,
-                           count * length, &slice_allocator->on_allocated);
+  grpc_resource_user_alloc(slice_allocator->resource_user, count * length,
+                           &slice_allocator->on_allocated);
 }
diff --git a/src/core/lib/iomgr/resource_quota.h b/src/core/lib/iomgr/resource_quota.h
index 7873703..39e3aab 100644
--- a/src/core/lib/iomgr/resource_quota.h
+++ b/src/core/lib/iomgr/resource_quota.h
@@ -65,8 +65,7 @@
 
 grpc_resource_quota* grpc_resource_quota_ref_internal(
     grpc_resource_quota* resource_quota);
-void grpc_resource_quota_unref_internal(grpc_exec_ctx* exec_ctx,
-                                        grpc_resource_quota* resource_quota);
+void grpc_resource_quota_unref_internal(grpc_resource_quota* resource_quota);
 grpc_resource_quota* grpc_resource_quota_from_channel_args(
     const grpc_channel_args* channel_args);
 
@@ -89,32 +88,26 @@
     grpc_resource_user* resource_user);
 
 void grpc_resource_user_ref(grpc_resource_user* resource_user);
-void grpc_resource_user_unref(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user);
-void grpc_resource_user_shutdown(grpc_exec_ctx* exec_ctx,
-                                 grpc_resource_user* resource_user);
+void grpc_resource_user_unref(grpc_resource_user* resource_user);
+void grpc_resource_user_shutdown(grpc_resource_user* resource_user);
 
 /* Allocate from the resource user (and its quota).
    If optional_on_done is NULL, then allocate immediately. This may push the
    quota over-limit, at which point reclamation will kick in.
    If optional_on_done is non-NULL, it will be scheduled when the allocation has
    been granted by the quota. */
-void grpc_resource_user_alloc(grpc_exec_ctx* exec_ctx,
-                              grpc_resource_user* resource_user, size_t size,
+void grpc_resource_user_alloc(grpc_resource_user* resource_user, size_t size,
                               grpc_closure* optional_on_done);
 /* Release memory back to the quota */
-void grpc_resource_user_free(grpc_exec_ctx* exec_ctx,
-                             grpc_resource_user* resource_user, size_t size);
+void grpc_resource_user_free(grpc_resource_user* resource_user, size_t size);
 /* Post a memory reclaimer to the resource user. Only one benign and one
    destructive reclaimer can be posted at once. When executed, the reclaimer
    MUST call grpc_resource_user_finish_reclamation before it completes, to
    return control to the resource quota. */
-void grpc_resource_user_post_reclaimer(grpc_exec_ctx* exec_ctx,
-                                       grpc_resource_user* resource_user,
+void grpc_resource_user_post_reclaimer(grpc_resource_user* resource_user,
                                        bool destructive, grpc_closure* closure);
 /* Finish a reclamation step */
-void grpc_resource_user_finish_reclamation(grpc_exec_ctx* exec_ctx,
-                                           grpc_resource_user* resource_user);
+void grpc_resource_user_finish_reclamation(grpc_resource_user* resource_user);
 
 /* Helper to allocate slices from a resource user */
 typedef struct grpc_resource_user_slice_allocator {
@@ -141,13 +134,11 @@
 /* Allocate \a count slices of length \a length into \a dest. Only one request
    can be outstanding at a time. */
 void grpc_resource_user_alloc_slices(
-    grpc_exec_ctx* exec_ctx,
     grpc_resource_user_slice_allocator* slice_allocator, size_t length,
     size_t count, grpc_slice_buffer* dest);
 
 /* Allocate one slice of length \a size synchronously. */
-grpc_slice grpc_resource_user_slice_malloc(grpc_exec_ctx* exec_ctx,
-                                           grpc_resource_user* resource_user,
+grpc_slice grpc_resource_user_slice_malloc(grpc_resource_user* resource_user,
                                            size_t size);
 
 #endif /* GRPC_CORE_LIB_IOMGR_RESOURCE_QUOTA_H */
diff --git a/src/core/lib/iomgr/socket_factory_posix.cc b/src/core/lib/iomgr/socket_factory_posix.cc
index 40bfecd..bc7d0b1 100644
--- a/src/core/lib/iomgr/socket_factory_posix.cc
+++ b/src/core/lib/iomgr/socket_factory_posix.cc
@@ -72,7 +72,7 @@
   return grpc_socket_factory_ref((grpc_socket_factory*)p);
 }
 
-static void socket_factory_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
+static void socket_factory_arg_destroy(void* p) {
   grpc_socket_factory_unref((grpc_socket_factory*)p);
 }
 
diff --git a/src/core/lib/iomgr/socket_mutator.cc b/src/core/lib/iomgr/socket_mutator.cc
index ff6c0c7..9d30e46 100644
--- a/src/core/lib/iomgr/socket_mutator.cc
+++ b/src/core/lib/iomgr/socket_mutator.cc
@@ -63,7 +63,7 @@
   return grpc_socket_mutator_ref((grpc_socket_mutator*)p);
 }
 
-static void socket_mutator_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
+static void socket_mutator_arg_destroy(void* p) {
   grpc_socket_mutator_unref((grpc_socket_mutator*)p);
 }
 
diff --git a/src/core/lib/iomgr/socket_windows.cc b/src/core/lib/iomgr/socket_windows.cc
index aee80f4..9bb6a75 100644
--- a/src/core/lib/iomgr/socket_windows.cc
+++ b/src/core/lib/iomgr/socket_windows.cc
@@ -109,37 +109,34 @@
 -) The IOCP already completed in the background, and we need to call
 the callback now.
 -) The IOCP hasn't completed yet, and we're queuing it for later. */
-static void socket_notify_on_iocp(grpc_exec_ctx* exec_ctx,
-                                  grpc_winsocket* socket, grpc_closure* closure,
+static void socket_notify_on_iocp(grpc_winsocket* socket, grpc_closure* closure,
                                   grpc_winsocket_callback_info* info) {
   GPR_ASSERT(info->closure == NULL);
   gpr_mu_lock(&socket->state_mu);
   if (info->has_pending_iocp) {
     info->has_pending_iocp = 0;
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
   } else {
     info->closure = closure;
   }
   gpr_mu_unlock(&socket->state_mu);
 }
 
-void grpc_socket_notify_on_write(grpc_exec_ctx* exec_ctx,
-                                 grpc_winsocket* socket,
+void grpc_socket_notify_on_write(grpc_winsocket* socket,
                                  grpc_closure* closure) {
-  socket_notify_on_iocp(exec_ctx, socket, closure, &socket->write_info);
+  socket_notify_on_iocp(socket, closure, &socket->write_info);
 }
 
-void grpc_socket_notify_on_read(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
-                                grpc_closure* closure) {
-  socket_notify_on_iocp(exec_ctx, socket, closure, &socket->read_info);
+void grpc_socket_notify_on_read(grpc_winsocket* socket, grpc_closure* closure) {
+  socket_notify_on_iocp(socket, closure, &socket->read_info);
 }
 
-void grpc_socket_become_ready(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
+void grpc_socket_become_ready(grpc_winsocket* socket,
                               grpc_winsocket_callback_info* info) {
   GPR_ASSERT(!info->has_pending_iocp);
   gpr_mu_lock(&socket->state_mu);
   if (info->closure) {
-    GRPC_CLOSURE_SCHED(exec_ctx, info->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(info->closure, GRPC_ERROR_NONE);
     info->closure = NULL;
   } else {
     info->has_pending_iocp = 1;
diff --git a/src/core/lib/iomgr/socket_windows.h b/src/core/lib/iomgr/socket_windows.h
index 04e0a89..cb28f2b 100644
--- a/src/core/lib/iomgr/socket_windows.h
+++ b/src/core/lib/iomgr/socket_windows.h
@@ -98,16 +98,13 @@
 /* Destroy a socket. Should only be called if there's no pending operation. */
 void grpc_winsocket_destroy(grpc_winsocket* socket);
 
-void grpc_socket_notify_on_write(grpc_exec_ctx* exec_ctx,
-                                 grpc_winsocket* winsocket,
+void grpc_socket_notify_on_write(grpc_winsocket* winsocket,
                                  grpc_closure* closure);
 
-void grpc_socket_notify_on_read(grpc_exec_ctx* exec_ctx,
-                                grpc_winsocket* winsocket,
+void grpc_socket_notify_on_read(grpc_winsocket* winsocket,
                                 grpc_closure* closure);
 
-void grpc_socket_become_ready(grpc_exec_ctx* exec_ctx,
-                              grpc_winsocket* winsocket,
+void grpc_socket_become_ready(grpc_winsocket* winsocket,
                               grpc_winsocket_callback_info* ci);
 
 #endif
diff --git a/src/core/lib/iomgr/tcp_client.h b/src/core/lib/iomgr/tcp_client.h
index 75e2fe0..5f55d30 100644
--- a/src/core/lib/iomgr/tcp_client.h
+++ b/src/core/lib/iomgr/tcp_client.h
@@ -30,8 +30,7 @@
    NULL on failure).
    interested_parties points to a set of pollsets that would be interested
    in this connection being established (in order to continue their work) */
-void grpc_tcp_client_connect(grpc_exec_ctx* exec_ctx, grpc_closure* on_connect,
-                             grpc_endpoint** endpoint,
+void grpc_tcp_client_connect(grpc_closure* on_connect, grpc_endpoint** endpoint,
                              grpc_pollset_set* interested_parties,
                              const grpc_channel_args* channel_args,
                              const grpc_resolved_address* addr,
diff --git a/src/core/lib/iomgr/tcp_client_posix.cc b/src/core/lib/iomgr/tcp_client_posix.cc
index 4cb2ac4..15062a5 100644
--- a/src/core/lib/iomgr/tcp_client_posix.cc
+++ b/src/core/lib/iomgr/tcp_client_posix.cc
@@ -96,7 +96,7 @@
   return err;
 }
 
-static void tc_on_alarm(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
+static void tc_on_alarm(void* acp, grpc_error* error) {
   int done;
   async_connect* ac = (async_connect*)acp;
   if (grpc_tcp_trace.enabled()) {
@@ -107,26 +107,24 @@
   gpr_mu_lock(&ac->mu);
   if (ac->fd != nullptr) {
     grpc_fd_shutdown(
-        exec_ctx, ac->fd,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("connect() timed out"));
+        ac->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING("connect() timed out"));
   }
   done = (--ac->refs == 0);
   gpr_mu_unlock(&ac->mu);
   if (done) {
     gpr_mu_destroy(&ac->mu);
     gpr_free(ac->addr_str);
-    grpc_channel_args_destroy(exec_ctx, ac->channel_args);
+    grpc_channel_args_destroy(ac->channel_args);
     gpr_free(ac);
   }
 }
 
 grpc_endpoint* grpc_tcp_client_create_from_fd(
-    grpc_exec_ctx* exec_ctx, grpc_fd* fd, const grpc_channel_args* channel_args,
-    const char* addr_str) {
-  return grpc_tcp_create(exec_ctx, fd, channel_args, addr_str);
+    grpc_fd* fd, const grpc_channel_args* channel_args, const char* addr_str) {
+  return grpc_tcp_create(fd, channel_args, addr_str);
 }
 
-static void on_writable(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
+static void on_writable(void* acp, grpc_error* error) {
   async_connect* ac = (async_connect*)acp;
   int so_error = 0;
   socklen_t so_error_size;
@@ -150,7 +148,7 @@
   ac->fd = nullptr;
   gpr_mu_unlock(&ac->mu);
 
-  grpc_timer_cancel(exec_ctx, &ac->alarm);
+  grpc_timer_cancel(&ac->alarm);
 
   gpr_mu_lock(&ac->mu);
   if (error != GRPC_ERROR_NONE) {
@@ -172,9 +170,8 @@
 
   switch (so_error) {
     case 0:
-      grpc_pollset_set_del_fd(exec_ctx, ac->interested_parties, fd);
-      *ep = grpc_tcp_client_create_from_fd(exec_ctx, fd, ac->channel_args,
-                                           ac->addr_str);
+      grpc_pollset_set_del_fd(ac->interested_parties, fd);
+      *ep = grpc_tcp_client_create_from_fd(fd, ac->channel_args, ac->addr_str);
       fd = nullptr;
       break;
     case ENOBUFS:
@@ -194,7 +191,7 @@
          don't do that! */
       gpr_log(GPR_ERROR, "kernel out of buffers");
       gpr_mu_unlock(&ac->mu);
-      grpc_fd_notify_on_write(exec_ctx, fd, &ac->write_closure);
+      grpc_fd_notify_on_write(fd, &ac->write_closure);
       return;
     case ECONNREFUSED:
       /* This error shouldn't happen for anything other than connect(). */
@@ -209,8 +206,8 @@
 
 finish:
   if (fd != nullptr) {
-    grpc_pollset_set_del_fd(exec_ctx, ac->interested_parties, fd);
-    grpc_fd_orphan(exec_ctx, fd, nullptr, nullptr, false /* already_closed */,
+    grpc_pollset_set_del_fd(ac->interested_parties, fd);
+    grpc_fd_orphan(fd, nullptr, nullptr, false /* already_closed */,
                    "tcp_client_orphan");
     fd = nullptr;
   }
@@ -233,14 +230,13 @@
   if (done) {
     gpr_mu_destroy(&ac->mu);
     gpr_free(ac->addr_str);
-    grpc_channel_args_destroy(exec_ctx, ac->channel_args);
+    grpc_channel_args_destroy(ac->channel_args);
     gpr_free(ac);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, closure, error);
+  GRPC_CLOSURE_SCHED(closure, error);
 }
 
-static void tcp_client_connect_impl(grpc_exec_ctx* exec_ctx,
-                                    grpc_closure* closure, grpc_endpoint** ep,
+static void tcp_client_connect_impl(grpc_closure* closure, grpc_endpoint** ep,
                                     grpc_pollset_set* interested_parties,
                                     const grpc_channel_args* channel_args,
                                     const grpc_resolved_address* addr,
@@ -265,7 +261,7 @@
 
   error = grpc_create_dualstack_socket(addr, SOCK_STREAM, 0, &dsmode, &fd);
   if (error != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, error);
+    GRPC_CLOSURE_SCHED(closure, error);
     return;
   }
   if (dsmode == GRPC_DSMODE_IPV4) {
@@ -274,7 +270,7 @@
     addr = &addr4_copy;
   }
   if ((error = prepare_socket(addr, fd, channel_args)) != GRPC_ERROR_NONE) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, error);
+    GRPC_CLOSURE_SCHED(closure, error);
     return;
   }
 
@@ -289,20 +285,19 @@
   fdobj = grpc_fd_create(fd, name);
 
   if (err >= 0) {
-    *ep =
-        grpc_tcp_client_create_from_fd(exec_ctx, fdobj, channel_args, addr_str);
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+    *ep = grpc_tcp_client_create_from_fd(fdobj, channel_args, addr_str);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
     goto done;
   }
 
   if (errno != EWOULDBLOCK && errno != EINPROGRESS) {
-    grpc_fd_orphan(exec_ctx, fdobj, nullptr, nullptr,
-                   false /* already_closed */, "tcp_client_connect_error");
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_OS_ERROR(errno, "connect"));
+    grpc_fd_orphan(fdobj, nullptr, nullptr, false /* already_closed */,
+                   "tcp_client_connect_error");
+    GRPC_CLOSURE_SCHED(closure, GRPC_OS_ERROR(errno, "connect"));
     goto done;
   }
 
-  grpc_pollset_set_add_fd(exec_ctx, interested_parties, fdobj);
+  grpc_pollset_set_add_fd(interested_parties, fdobj);
 
   ac = (async_connect*)gpr_malloc(sizeof(async_connect));
   ac->closure = closure;
@@ -324,8 +319,8 @@
 
   gpr_mu_lock(&ac->mu);
   GRPC_CLOSURE_INIT(&ac->on_alarm, tc_on_alarm, ac, grpc_schedule_on_exec_ctx);
-  grpc_timer_init(exec_ctx, &ac->alarm, deadline, &ac->on_alarm);
-  grpc_fd_notify_on_write(exec_ctx, ac->fd, &ac->write_closure);
+  grpc_timer_init(&ac->alarm, deadline, &ac->on_alarm);
+  grpc_fd_notify_on_write(ac->fd, &ac->write_closure);
   gpr_mu_unlock(&ac->mu);
 
 done:
@@ -335,19 +330,18 @@
 
 // overridden by api_fuzzer.c
 void (*grpc_tcp_client_connect_impl)(
-    grpc_exec_ctx* exec_ctx, grpc_closure* closure, grpc_endpoint** ep,
+    grpc_closure* closure, grpc_endpoint** ep,
     grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
     const grpc_resolved_address* addr,
     grpc_millis deadline) = tcp_client_connect_impl;
 
-void grpc_tcp_client_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                             grpc_endpoint** ep,
+void grpc_tcp_client_connect(grpc_closure* closure, grpc_endpoint** ep,
                              grpc_pollset_set* interested_parties,
                              const grpc_channel_args* channel_args,
                              const grpc_resolved_address* addr,
                              grpc_millis deadline) {
-  grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
-                               channel_args, addr, deadline);
+  grpc_tcp_client_connect_impl(closure, ep, interested_parties, channel_args,
+                               addr, deadline);
 }
 
 #endif
diff --git a/src/core/lib/iomgr/tcp_client_posix.h b/src/core/lib/iomgr/tcp_client_posix.h
index 2b1fe79..7d0f133 100644
--- a/src/core/lib/iomgr/tcp_client_posix.h
+++ b/src/core/lib/iomgr/tcp_client_posix.h
@@ -24,7 +24,6 @@
 #include "src/core/lib/iomgr/tcp_client.h"
 
 grpc_endpoint* grpc_tcp_client_create_from_fd(
-    grpc_exec_ctx* exec_ctx, grpc_fd* fd, const grpc_channel_args* channel_args,
-    const char* addr_str);
+    grpc_fd* fd, const grpc_channel_args* channel_args, const char* addr_str);
 
 #endif /* GRPC_CORE_LIB_IOMGR_TCP_CLIENT_POSIX_H */
diff --git a/src/core/lib/iomgr/tcp_client_uv.cc b/src/core/lib/iomgr/tcp_client_uv.cc
index 5cca0c9..4e9c7cc 100644
--- a/src/core/lib/iomgr/tcp_client_uv.cc
+++ b/src/core/lib/iomgr/tcp_client_uv.cc
@@ -46,17 +46,15 @@
   grpc_resource_quota* resource_quota;
 } grpc_uv_tcp_connect;
 
-static void uv_tcp_connect_cleanup(grpc_exec_ctx* exec_ctx,
-                                   grpc_uv_tcp_connect* connect) {
-  grpc_resource_quota_unref_internal(exec_ctx, connect->resource_quota);
+static void uv_tcp_connect_cleanup(grpc_uv_tcp_connect* connect) {
+  grpc_resource_quota_unref_internal(connect->resource_quota);
   gpr_free(connect->addr_name);
   gpr_free(connect);
 }
 
 static void tcp_close_callback(uv_handle_t* handle) { gpr_free(handle); }
 
-static void uv_tc_on_alarm(grpc_exec_ctx* exec_ctx, void* acp,
-                           grpc_error* error) {
+static void uv_tc_on_alarm(void* acp, grpc_error* error) {
   int done;
   grpc_uv_tcp_connect* connect = (grpc_uv_tcp_connect*)acp;
   if (grpc_tcp_trace.enabled()) {
@@ -72,17 +70,17 @@
   }
   done = (--connect->refs == 0);
   if (done) {
-    uv_tcp_connect_cleanup(exec_ctx, connect);
+    uv_tcp_connect_cleanup(connect);
   }
 }
 
 static void uv_tc_on_connect(uv_connect_t* req, int status) {
   grpc_uv_tcp_connect* connect = (grpc_uv_tcp_connect*)req->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_error* error = GRPC_ERROR_NONE;
   int done;
   grpc_closure* closure = connect->closure;
-  grpc_timer_cancel(&exec_ctx, &connect->alarm);
+  grpc_timer_cancel(&connect->alarm);
   if (status == 0) {
     *connect->endpoint = grpc_tcp_create(
         connect->tcp_handle, connect->resource_quota, connect->addr_name);
@@ -107,15 +105,13 @@
   }
   done = (--connect->refs == 0);
   if (done) {
-    grpc_exec_ctx_flush(&exec_ctx);
-    uv_tcp_connect_cleanup(&exec_ctx, connect);
+    grpc_core::ExecCtx::Get()->Flush();
+    uv_tcp_connect_cleanup(connect);
   }
-  GRPC_CLOSURE_SCHED(&exec_ctx, closure, error);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CLOSURE_SCHED(closure, error);
 }
 
-static void tcp_client_connect_impl(grpc_exec_ctx* exec_ctx,
-                                    grpc_closure* closure, grpc_endpoint** ep,
+static void tcp_client_connect_impl(grpc_closure* closure, grpc_endpoint** ep,
                                     grpc_pollset_set* interested_parties,
                                     const grpc_channel_args* channel_args,
                                     const grpc_resolved_address* resolved_addr,
@@ -130,7 +126,7 @@
   if (channel_args != NULL) {
     for (size_t i = 0; i < channel_args->num_args; i++) {
       if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
-        grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+        grpc_resource_quota_unref_internal(resource_quota);
         resource_quota = grpc_resource_quota_ref_internal(
             (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
       }
@@ -157,24 +153,23 @@
                  (const struct sockaddr*)resolved_addr->addr, uv_tc_on_connect);
   GRPC_CLOSURE_INIT(&connect->on_alarm, uv_tc_on_alarm, connect,
                     grpc_schedule_on_exec_ctx);
-  grpc_timer_init(exec_ctx, &connect->alarm, deadline, &connect->on_alarm);
+  grpc_timer_init(&connect->alarm, deadline, &connect->on_alarm);
 }
 
 // overridden by api_fuzzer.c
 void (*grpc_tcp_client_connect_impl)(
-    grpc_exec_ctx* exec_ctx, grpc_closure* closure, grpc_endpoint** ep,
+    grpc_closure* closure, grpc_endpoint** ep,
     grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
     const grpc_resolved_address* addr,
     grpc_millis deadline) = tcp_client_connect_impl;
 
-void grpc_tcp_client_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                             grpc_endpoint** ep,
+void grpc_tcp_client_connect(grpc_closure* closure, grpc_endpoint** ep,
                              grpc_pollset_set* interested_parties,
                              const grpc_channel_args* channel_args,
                              const grpc_resolved_address* addr,
                              grpc_millis deadline) {
-  grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
-                               channel_args, addr, deadline);
+  grpc_tcp_client_connect_impl(closure, ep, interested_parties, channel_args,
+                               addr, deadline);
 }
 
 #endif /* GRPC_UV */
diff --git a/src/core/lib/iomgr/tcp_client_windows.cc b/src/core/lib/iomgr/tcp_client_windows.cc
index 5e30725..5521a0a 100644
--- a/src/core/lib/iomgr/tcp_client_windows.cc
+++ b/src/core/lib/iomgr/tcp_client_windows.cc
@@ -52,13 +52,12 @@
   grpc_channel_args* channel_args;
 } async_connect;
 
-static void async_connect_unlock_and_cleanup(grpc_exec_ctx* exec_ctx,
-                                             async_connect* ac,
+static void async_connect_unlock_and_cleanup(async_connect* ac,
                                              grpc_winsocket* socket) {
   int done = (--ac->refs == 0);
   gpr_mu_unlock(&ac->mu);
   if (done) {
-    grpc_channel_args_destroy(exec_ctx, ac->channel_args);
+    grpc_channel_args_destroy(ac->channel_args);
     gpr_mu_destroy(&ac->mu);
     gpr_free(ac->addr_name);
     gpr_free(ac);
@@ -66,7 +65,7 @@
   if (socket != NULL) grpc_winsocket_destroy(socket);
 }
 
-static void on_alarm(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
+static void on_alarm(void* acp, grpc_error* error) {
   async_connect* ac = (async_connect*)acp;
   gpr_mu_lock(&ac->mu);
   grpc_winsocket* socket = ac->socket;
@@ -74,10 +73,10 @@
   if (socket != NULL) {
     grpc_winsocket_shutdown(socket);
   }
-  async_connect_unlock_and_cleanup(exec_ctx, ac, socket);
+  async_connect_unlock_and_cleanup(ac, socket);
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* acp, grpc_error* error) {
+static void on_connect(void* acp, grpc_error* error) {
   async_connect* ac = (async_connect*)acp;
   grpc_endpoint** ep = ac->endpoint;
   GPR_ASSERT(*ep == NULL);
@@ -90,7 +89,7 @@
   ac->socket = NULL;
   gpr_mu_unlock(&ac->mu);
 
-  grpc_timer_cancel(exec_ctx, &ac->alarm);
+  grpc_timer_cancel(&ac->alarm);
 
   gpr_mu_lock(&ac->mu);
 
@@ -105,8 +104,7 @@
       if (!wsa_success) {
         error = GRPC_WSA_ERROR(WSAGetLastError(), "ConnectEx");
       } else {
-        *ep =
-            grpc_tcp_create(exec_ctx, socket, ac->channel_args, ac->addr_name);
+        *ep = grpc_tcp_create(socket, ac->channel_args, ac->addr_name);
         socket = NULL;
       }
     } else {
@@ -114,18 +112,20 @@
     }
   }
 
-  async_connect_unlock_and_cleanup(exec_ctx, ac, socket);
+  async_connect_unlock_and_cleanup(ac, socket);
   /* If the connection was aborted, the callback was already called when
      the deadline was met. */
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
 }
 
 /* Tries to issue one async connection, then schedules both an IOCP
    notification request for the connection, and one timeout alert. */
-static void tcp_client_connect_impl(
-    grpc_exec_ctx* exec_ctx, grpc_closure* on_done, grpc_endpoint** endpoint,
-    grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
-    const grpc_resolved_address* addr, grpc_millis deadline) {
+static void tcp_client_connect_impl(grpc_closure* on_done,
+                                    grpc_endpoint** endpoint,
+                                    grpc_pollset_set* interested_parties,
+                                    const grpc_channel_args* channel_args,
+                                    const grpc_resolved_address* addr,
+                                    grpc_millis deadline) {
   SOCKET sock = INVALID_SOCKET;
   BOOL success;
   int status;
@@ -205,8 +205,8 @@
   GRPC_CLOSURE_INIT(&ac->on_connect, on_connect, ac, grpc_schedule_on_exec_ctx);
 
   GRPC_CLOSURE_INIT(&ac->on_alarm, on_alarm, ac, grpc_schedule_on_exec_ctx);
-  grpc_timer_init(exec_ctx, &ac->alarm, deadline, &ac->on_alarm);
-  grpc_socket_notify_on_write(exec_ctx, socket, &ac->on_connect);
+  grpc_timer_init(&ac->alarm, deadline, &ac->on_alarm);
+  grpc_socket_notify_on_write(socket, &ac->on_connect);
   return;
 
 failure:
@@ -222,24 +222,23 @@
   } else if (sock != INVALID_SOCKET) {
     closesocket(sock);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, final_error);
+  GRPC_CLOSURE_SCHED(on_done, final_error);
 }
 
 // overridden by api_fuzzer.c
 void (*grpc_tcp_client_connect_impl)(
-    grpc_exec_ctx* exec_ctx, grpc_closure* closure, grpc_endpoint** ep,
+    grpc_closure* closure, grpc_endpoint** ep,
     grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
     const grpc_resolved_address* addr,
     grpc_millis deadline) = tcp_client_connect_impl;
 
-void grpc_tcp_client_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                             grpc_endpoint** ep,
+void grpc_tcp_client_connect(grpc_closure* closure, grpc_endpoint** ep,
                              grpc_pollset_set* interested_parties,
                              const grpc_channel_args* channel_args,
                              const grpc_resolved_address* addr,
                              grpc_millis deadline) {
-  grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties,
-                               channel_args, addr, deadline);
+  grpc_tcp_client_connect_impl(closure, ep, interested_parties, channel_args,
+                               addr, deadline);
 }
 
 #endif /* GRPC_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/tcp_posix.cc b/src/core/lib/iomgr/tcp_posix.cc
index d09cfca..155329d 100644
--- a/src/core/lib/iomgr/tcp_posix.cc
+++ b/src/core/lib/iomgr/tcp_posix.cc
@@ -108,36 +108,31 @@
 static gpr_atm g_uncovered_notifications_pending;
 static gpr_atm g_backup_poller; /* backup_poller* */
 
-static void tcp_handle_read(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                            grpc_error* error);
-static void tcp_handle_write(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                             grpc_error* error);
-static void tcp_drop_uncovered_then_handle_write(grpc_exec_ctx* exec_ctx,
-                                                 void* arg /* grpc_tcp */,
+static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error);
+static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error);
+static void tcp_drop_uncovered_then_handle_write(void* arg /* grpc_tcp */,
                                                  grpc_error* error);
 
-static void done_poller(grpc_exec_ctx* exec_ctx, void* bp,
-                        grpc_error* error_ignored) {
+static void done_poller(void* bp, grpc_error* error_ignored) {
   backup_poller* p = (backup_poller*)bp;
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p destroy", p);
   }
-  grpc_pollset_destroy(exec_ctx, BACKUP_POLLER_POLLSET(p));
+  grpc_pollset_destroy(BACKUP_POLLER_POLLSET(p));
   gpr_free(p);
 }
 
-static void run_poller(grpc_exec_ctx* exec_ctx, void* bp,
-                       grpc_error* error_ignored) {
+static void run_poller(void* bp, grpc_error* error_ignored) {
   backup_poller* p = (backup_poller*)bp;
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p run", p);
   }
   gpr_mu_lock(p->pollset_mu);
-  grpc_millis deadline = grpc_exec_ctx_now(exec_ctx) + 13 * GPR_MS_PER_SEC;
-  GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS(exec_ctx);
+  grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 13 * GPR_MS_PER_SEC;
+  GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS();
   GRPC_LOG_IF_ERROR(
       "backup_poller:pollset_work",
-      grpc_pollset_work(exec_ctx, BACKUP_POLLER_POLLSET(p), nullptr, deadline));
+      grpc_pollset_work(BACKUP_POLLER_POLLSET(p), nullptr, deadline));
   gpr_mu_unlock(p->pollset_mu);
   /* last "uncovered" notification is the ref that keeps us polling, if we get
    * there try a cas to release it */
@@ -152,18 +147,18 @@
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p shutdown", p);
     }
-    grpc_pollset_shutdown(exec_ctx, BACKUP_POLLER_POLLSET(p),
+    grpc_pollset_shutdown(BACKUP_POLLER_POLLSET(p),
                           GRPC_CLOSURE_INIT(&p->run_poller, done_poller, p,
                                             grpc_schedule_on_exec_ctx));
   } else {
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p reschedule", p);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, &p->run_poller, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&p->run_poller, GRPC_ERROR_NONE);
   }
 }
 
-static void drop_uncovered(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void drop_uncovered(grpc_tcp* tcp) {
   backup_poller* p = (backup_poller*)gpr_atm_acq_load(&g_backup_poller);
   gpr_atm old_count =
       gpr_atm_no_barrier_fetch_add(&g_uncovered_notifications_pending, -1);
@@ -174,7 +169,7 @@
   GPR_ASSERT(old_count != 1);
 }
 
-static void cover_self(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void cover_self(grpc_tcp* tcp) {
   backup_poller* p;
   gpr_atm old_count =
       gpr_atm_no_barrier_fetch_add(&g_uncovered_notifications_pending, 2);
@@ -183,7 +178,7 @@
             2 + (int)old_count);
   }
   if (old_count == 0) {
-    GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED(exec_ctx);
+    GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED();
     p = (backup_poller*)gpr_zalloc(sizeof(*p) + grpc_pollset_size());
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p create", p);
@@ -191,7 +186,6 @@
     grpc_pollset_init(BACKUP_POLLER_POLLSET(p), &p->pollset_mu);
     gpr_atm_rel_store(&g_backup_poller, (gpr_atm)p);
     GRPC_CLOSURE_SCHED(
-        exec_ctx,
         GRPC_CLOSURE_INIT(&p->run_poller, run_poller, p,
                           grpc_executor_scheduler(GRPC_EXECUTOR_LONG)),
         GRPC_ERROR_NONE);
@@ -204,39 +198,38 @@
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p add %p", p, tcp);
   }
-  grpc_pollset_add_fd(exec_ctx, BACKUP_POLLER_POLLSET(p), tcp->em_fd);
+  grpc_pollset_add_fd(BACKUP_POLLER_POLLSET(p), tcp->em_fd);
   if (old_count != 0) {
-    drop_uncovered(exec_ctx, tcp);
+    drop_uncovered(tcp);
   }
 }
 
-static void notify_on_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void notify_on_read(grpc_tcp* tcp) {
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p notify_on_read", tcp);
   }
   GRPC_CLOSURE_INIT(&tcp->read_done_closure, tcp_handle_read, tcp,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_read(exec_ctx, tcp->em_fd, &tcp->read_done_closure);
+  grpc_fd_notify_on_read(tcp->em_fd, &tcp->read_done_closure);
 }
 
-static void notify_on_write(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void notify_on_write(grpc_tcp* tcp) {
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p notify_on_write", tcp);
   }
-  cover_self(exec_ctx, tcp);
+  cover_self(tcp);
   GRPC_CLOSURE_INIT(&tcp->write_done_closure,
                     tcp_drop_uncovered_then_handle_write, tcp,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_write(exec_ctx, tcp->em_fd, &tcp->write_done_closure);
+  grpc_fd_notify_on_write(tcp->em_fd, &tcp->write_done_closure);
 }
 
-static void tcp_drop_uncovered_then_handle_write(grpc_exec_ctx* exec_ctx,
-                                                 void* arg, grpc_error* error) {
+static void tcp_drop_uncovered_then_handle_write(void* arg, grpc_error* error) {
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p got_write: %s", arg, grpc_error_string(error));
   }
-  drop_uncovered(exec_ctx, (grpc_tcp*)arg);
-  tcp_handle_write(exec_ctx, arg, error);
+  drop_uncovered((grpc_tcp*)arg);
+  tcp_handle_write(arg, error);
 }
 
 static void add_to_estimate(grpc_tcp* tcp, size_t bytes) {
@@ -282,33 +275,29 @@
       grpc_slice_from_copied_string(tcp->peer_string));
 }
 
-static void tcp_handle_read(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                            grpc_error* error);
-static void tcp_handle_write(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                             grpc_error* error);
+static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error);
+static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error);
 
-static void tcp_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_error* why) {
+static void tcp_shutdown(grpc_endpoint* ep, grpc_error* why) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_fd_shutdown(exec_ctx, tcp->em_fd, why);
-  grpc_resource_user_shutdown(exec_ctx, tcp->resource_user);
+  grpc_fd_shutdown(tcp->em_fd, why);
+  grpc_resource_user_shutdown(tcp->resource_user);
 }
 
-static void tcp_free(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
-  grpc_fd_orphan(exec_ctx, tcp->em_fd, tcp->release_fd_cb, tcp->release_fd,
+static void tcp_free(grpc_tcp* tcp) {
+  grpc_fd_orphan(tcp->em_fd, tcp->release_fd_cb, tcp->release_fd,
                  false /* already_closed */, "tcp_unref_orphan");
-  grpc_slice_buffer_destroy_internal(exec_ctx, &tcp->last_read_buffer);
-  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
+  grpc_slice_buffer_destroy_internal(&tcp->last_read_buffer);
+  grpc_resource_user_unref(tcp->resource_user);
   gpr_free(tcp->peer_string);
   gpr_free(tcp);
 }
 
 #ifndef NDEBUG
-#define TCP_UNREF(cl, tcp, reason) \
-  tcp_unref((cl), (tcp), (reason), __FILE__, __LINE__)
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
 #define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                      const char* reason, const char* file, int line) {
+static void tcp_unref(grpc_tcp* tcp, const char* reason, const char* file,
+                      int line) {
   if (grpc_tcp_trace.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&tcp->refcount.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -316,7 +305,7 @@
             val - 1);
   }
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -331,26 +320,25 @@
   gpr_ref(&tcp->refcount);
 }
 #else
-#define TCP_UNREF(cl, tcp, reason) tcp_unref((cl), (tcp))
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
 #define TCP_REF(tcp, reason) tcp_ref((tcp))
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_unref(grpc_tcp* tcp) {
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
 static void tcp_ref(grpc_tcp* tcp) { gpr_ref(&tcp->refcount); }
 #endif
 
-static void tcp_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void tcp_destroy(grpc_endpoint* ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &tcp->last_read_buffer);
-  TCP_UNREF(exec_ctx, tcp, "destroy");
+  grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
+  TCP_UNREF(tcp, "destroy");
 }
 
-static void call_read_cb(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                         grpc_error* error) {
+static void call_read_cb(grpc_tcp* tcp, grpc_error* error) {
   grpc_closure* cb = tcp->read_cb;
 
   if (grpc_tcp_trace.enabled()) {
@@ -369,11 +357,11 @@
 
   tcp->read_cb = nullptr;
   tcp->incoming_buffer = nullptr;
-  GRPC_CLOSURE_RUN(exec_ctx, cb, error);
+  GRPC_CLOSURE_RUN(cb, error);
 }
 
 #define MAX_READ_IOVEC 4
-static void tcp_do_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_do_read(grpc_tcp* tcp) {
   struct msghdr msg;
   struct iovec iov[MAX_READ_IOVEC];
   ssize_t read_bytes;
@@ -396,12 +384,12 @@
   msg.msg_controllen = 0;
   msg.msg_flags = 0;
 
-  GRPC_STATS_INC_TCP_READ_OFFER(exec_ctx, tcp->incoming_buffer->length);
-  GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(exec_ctx, tcp->incoming_buffer->count);
+  GRPC_STATS_INC_TCP_READ_OFFER(tcp->incoming_buffer->length);
+  GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(tcp->incoming_buffer->count);
 
   GPR_TIMER_BEGIN("recvmsg", 0);
   do {
-    GRPC_STATS_INC_SYSCALL_READ(exec_ctx);
+    GRPC_STATS_INC_SYSCALL_READ();
     read_bytes = recvmsg(tcp->fd, &msg, 0);
   } while (read_bytes < 0 && errno == EINTR);
   GPR_TIMER_END("recvmsg", read_bytes >= 0);
@@ -412,24 +400,22 @@
     if (errno == EAGAIN) {
       finish_estimate(tcp);
       /* We've consumed the edge, request a new one */
-      notify_on_read(exec_ctx, tcp);
+      notify_on_read(tcp);
     } else {
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                 tcp->incoming_buffer);
-      call_read_cb(exec_ctx, tcp,
+      grpc_slice_buffer_reset_and_unref_internal(tcp->incoming_buffer);
+      call_read_cb(tcp,
                    tcp_annotate_error(GRPC_OS_ERROR(errno, "recvmsg"), tcp));
-      TCP_UNREF(exec_ctx, tcp, "read");
+      TCP_UNREF(tcp, "read");
     }
   } else if (read_bytes == 0) {
     /* 0 read size ==> end of stream */
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(tcp->incoming_buffer);
     call_read_cb(
-        exec_ctx, tcp,
-        tcp_annotate_error(
-            GRPC_ERROR_CREATE_FROM_STATIC_STRING("Socket closed"), tcp));
-    TCP_UNREF(exec_ctx, tcp, "read");
+        tcp, tcp_annotate_error(
+                 GRPC_ERROR_CREATE_FROM_STATIC_STRING("Socket closed"), tcp));
+    TCP_UNREF(tcp, "read");
   } else {
-    GRPC_STATS_INC_TCP_READ_SIZE(exec_ctx, read_bytes);
+    GRPC_STATS_INC_TCP_READ_SIZE(read_bytes);
     add_to_estimate(tcp, (size_t)read_bytes);
     GPR_ASSERT((size_t)read_bytes <= tcp->incoming_buffer->length);
     if ((size_t)read_bytes < tcp->incoming_buffer->length) {
@@ -439,50 +425,47 @@
           &tcp->last_read_buffer);
     }
     GPR_ASSERT((size_t)read_bytes == tcp->incoming_buffer->length);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_NONE);
-    TCP_UNREF(exec_ctx, tcp, "read");
+    call_read_cb(tcp, GRPC_ERROR_NONE);
+    TCP_UNREF(tcp, "read");
   }
 
   GPR_TIMER_END("tcp_continue_read", 0);
 }
 
-static void tcp_read_allocation_done(grpc_exec_ctx* exec_ctx, void* tcpp,
-                                     grpc_error* error) {
+static void tcp_read_allocation_done(void* tcpp, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)tcpp;
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p read_allocation_done: %s", tcp,
             grpc_error_string(error));
   }
   if (error != GRPC_ERROR_NONE) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer);
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                               &tcp->last_read_buffer);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error));
-    TCP_UNREF(exec_ctx, tcp, "read");
+    grpc_slice_buffer_reset_and_unref_internal(tcp->incoming_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
+    call_read_cb(tcp, GRPC_ERROR_REF(error));
+    TCP_UNREF(tcp, "read");
   } else {
-    tcp_do_read(exec_ctx, tcp);
+    tcp_do_read(tcp);
   }
 }
 
-static void tcp_continue_read(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_continue_read(grpc_tcp* tcp) {
   size_t target_read_size = get_target_read_size(tcp);
   if (tcp->incoming_buffer->length < target_read_size &&
       tcp->incoming_buffer->count < MAX_READ_IOVEC) {
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "TCP:%p alloc_slices", tcp);
     }
-    grpc_resource_user_alloc_slices(exec_ctx, &tcp->slice_allocator,
-                                    target_read_size, 1, tcp->incoming_buffer);
+    grpc_resource_user_alloc_slices(&tcp->slice_allocator, target_read_size, 1,
+                                    tcp->incoming_buffer);
   } else {
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "TCP:%p do_read", tcp);
     }
-    tcp_do_read(exec_ctx, tcp);
+    tcp_do_read(tcp);
   }
 }
 
-static void tcp_handle_read(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                            grpc_error* error) {
+static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)arg;
   GPR_ASSERT(!tcp->finished_edge);
   if (grpc_tcp_trace.enabled()) {
@@ -490,37 +473,35 @@
   }
 
   if (error != GRPC_ERROR_NONE) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->incoming_buffer);
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                               &tcp->last_read_buffer);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error));
-    TCP_UNREF(exec_ctx, tcp, "read");
+    grpc_slice_buffer_reset_and_unref_internal(tcp->incoming_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
+    call_read_cb(tcp, GRPC_ERROR_REF(error));
+    TCP_UNREF(tcp, "read");
   } else {
-    tcp_continue_read(exec_ctx, tcp);
+    tcp_continue_read(tcp);
   }
 }
 
-static void tcp_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* incoming_buffer, grpc_closure* cb) {
+static void tcp_read(grpc_endpoint* ep, grpc_slice_buffer* incoming_buffer,
+                     grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   GPR_ASSERT(tcp->read_cb == nullptr);
   tcp->read_cb = cb;
   tcp->incoming_buffer = incoming_buffer;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, incoming_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(incoming_buffer);
   grpc_slice_buffer_swap(incoming_buffer, &tcp->last_read_buffer);
   TCP_REF(tcp, "read");
   if (tcp->finished_edge) {
     tcp->finished_edge = false;
-    notify_on_read(exec_ctx, tcp);
+    notify_on_read(tcp);
   } else {
-    GRPC_CLOSURE_SCHED(exec_ctx, &tcp->read_done_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&tcp->read_done_closure, GRPC_ERROR_NONE);
   }
 }
 
 /* returns true if done, false if pending; if returning true, *error is set */
 #define MAX_WRITE_IOVEC 1000
-static bool tcp_flush(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                      grpc_error** error) {
+static bool tcp_flush(grpc_tcp* tcp, grpc_error** error) {
   struct msghdr msg;
   struct iovec iov[MAX_WRITE_IOVEC];
   msg_iovlen_type iov_size;
@@ -562,13 +543,13 @@
     msg.msg_controllen = 0;
     msg.msg_flags = 0;
 
-    GRPC_STATS_INC_TCP_WRITE_SIZE(exec_ctx, sending_length);
-    GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(exec_ctx, iov_size);
+    GRPC_STATS_INC_TCP_WRITE_SIZE(sending_length);
+    GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(iov_size);
 
     GPR_TIMER_BEGIN("sendmsg", 1);
     do {
       /* TODO(klempner): Cork if this is a partial write */
-      GRPC_STATS_INC_SYSCALL_WRITE(exec_ctx);
+      GRPC_STATS_INC_SYSCALL_WRITE();
       sent_length = sendmsg(tcp->fd, &msg, SENDMSG_FLAGS);
     } while (sent_length < 0 && errno == EINTR);
     GPR_TIMER_END("sendmsg", 0);
@@ -580,20 +561,18 @@
         // point
         for (size_t idx = 0; idx < unwind_slice_idx; ++idx) {
           grpc_slice_unref_internal(
-              exec_ctx, grpc_slice_buffer_take_first(tcp->outgoing_buffer));
+              grpc_slice_buffer_take_first(tcp->outgoing_buffer));
         }
         return false;
       } else if (errno == EPIPE) {
         *error = grpc_error_set_int(GRPC_OS_ERROR(errno, "sendmsg"),
                                     GRPC_ERROR_INT_GRPC_STATUS,
                                     GRPC_STATUS_UNAVAILABLE);
-        grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                   tcp->outgoing_buffer);
+        grpc_slice_buffer_reset_and_unref_internal(tcp->outgoing_buffer);
         return true;
       } else {
         *error = tcp_annotate_error(GRPC_OS_ERROR(errno, "sendmsg"), tcp);
-        grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                   tcp->outgoing_buffer);
+        grpc_slice_buffer_reset_and_unref_internal(tcp->outgoing_buffer);
         return true;
       }
     }
@@ -616,31 +595,29 @@
 
     if (outgoing_slice_idx == tcp->outgoing_buffer->count) {
       *error = GRPC_ERROR_NONE;
-      grpc_slice_buffer_reset_and_unref_internal(exec_ctx,
-                                                 tcp->outgoing_buffer);
+      grpc_slice_buffer_reset_and_unref_internal(tcp->outgoing_buffer);
       return true;
     }
   }
 }
 
-static void tcp_handle_write(grpc_exec_ctx* exec_ctx, void* arg /* grpc_tcp */,
-                             grpc_error* error) {
+static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)arg;
   grpc_closure* cb;
 
   if (error != GRPC_ERROR_NONE) {
     cb = tcp->write_cb;
     tcp->write_cb = nullptr;
-    cb->cb(exec_ctx, cb->cb_arg, error);
-    TCP_UNREF(exec_ctx, tcp, "write");
+    cb->cb(cb->cb_arg, error);
+    TCP_UNREF(tcp, "write");
     return;
   }
 
-  if (!tcp_flush(exec_ctx, tcp, &error)) {
+  if (!tcp_flush(tcp, &error)) {
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "write: delayed");
     }
-    notify_on_write(exec_ctx, tcp);
+    notify_on_write(tcp);
   } else {
     cb = tcp->write_cb;
     tcp->write_cb = nullptr;
@@ -649,13 +626,13 @@
       gpr_log(GPR_DEBUG, "write: %s", str);
     }
 
-    GRPC_CLOSURE_RUN(exec_ctx, cb, error);
-    TCP_UNREF(exec_ctx, tcp, "write");
+    GRPC_CLOSURE_RUN(cb, error);
+    TCP_UNREF(tcp, "write");
   }
 }
 
-static void tcp_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                      grpc_slice_buffer* buf, grpc_closure* cb) {
+static void tcp_write(grpc_endpoint* ep, grpc_slice_buffer* buf,
+                      grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   grpc_error* error = GRPC_ERROR_NONE;
 
@@ -676,51 +653,48 @@
   if (buf->length == 0) {
     GPR_TIMER_END("tcp_write", 0);
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        grpc_fd_is_shutdown(tcp->em_fd)
-            ? tcp_annotate_error(GRPC_ERROR_CREATE_FROM_STATIC_STRING("EOF"),
-                                 tcp)
-            : GRPC_ERROR_NONE);
+        cb, grpc_fd_is_shutdown(tcp->em_fd)
+                ? tcp_annotate_error(
+                      GRPC_ERROR_CREATE_FROM_STATIC_STRING("EOF"), tcp)
+                : GRPC_ERROR_NONE);
     return;
   }
   tcp->outgoing_buffer = buf;
   tcp->outgoing_byte_idx = 0;
 
-  if (!tcp_flush(exec_ctx, tcp, &error)) {
+  if (!tcp_flush(tcp, &error)) {
     TCP_REF(tcp, "write");
     tcp->write_cb = cb;
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "write: delayed");
     }
-    notify_on_write(exec_ctx, tcp);
+    notify_on_write(tcp);
   } else {
     if (grpc_tcp_trace.enabled()) {
       const char* str = grpc_error_string(error);
       gpr_log(GPR_DEBUG, "write: %s", str);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+    GRPC_CLOSURE_SCHED(cb, error);
   }
 
   GPR_TIMER_END("tcp_write", 0);
 }
 
-static void tcp_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                               grpc_pollset* pollset) {
+static void tcp_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_pollset_add_fd(exec_ctx, pollset, tcp->em_fd);
+  grpc_pollset_add_fd(pollset, tcp->em_fd);
 }
 
-static void tcp_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void tcp_add_to_pollset_set(grpc_endpoint* ep,
                                    grpc_pollset_set* pollset_set) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_pollset_set_add_fd(exec_ctx, pollset_set, tcp->em_fd);
+  grpc_pollset_set_add_fd(pollset_set, tcp->em_fd);
 }
 
-static void tcp_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_endpoint* ep,
+static void tcp_delete_from_pollset_set(grpc_endpoint* ep,
                                         grpc_pollset_set* pollset_set) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  grpc_pollset_set_del_fd(exec_ctx, pollset_set, tcp->em_fd);
+  grpc_pollset_set_del_fd(pollset_set, tcp->em_fd);
 }
 
 static char* tcp_get_peer(grpc_endpoint* ep) {
@@ -751,7 +725,7 @@
 
 #define MAX_CHUNK_SIZE 32 * 1024 * 1024
 
-grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_fd* em_fd,
+grpc_endpoint* grpc_tcp_create(grpc_fd* em_fd,
                                const grpc_channel_args* channel_args,
                                const char* peer_string) {
   int tcp_read_chunk_size = GRPC_TCP_DEFAULT_READ_SLICE_SIZE;
@@ -780,7 +754,7 @@
             grpc_channel_arg_get_integer(&channel_args->args[i], options);
       } else if (0 ==
                  strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
-        grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+        grpc_resource_quota_unref_internal(resource_quota);
         resource_quota = grpc_resource_quota_ref_internal(
             (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
       }
@@ -817,7 +791,7 @@
       &tcp->slice_allocator, tcp->resource_user, tcp_read_allocation_done, tcp);
   /* Tell network status tracker about new endpoint */
   grpc_network_status_register_endpoint(&tcp->base);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 
   return &tcp->base;
 }
@@ -828,15 +802,15 @@
   return grpc_fd_wrapped_fd(tcp->em_fd);
 }
 
-void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                     int* fd, grpc_closure* done) {
+void grpc_tcp_destroy_and_release_fd(grpc_endpoint* ep, int* fd,
+                                     grpc_closure* done) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp* tcp = (grpc_tcp*)ep;
   GPR_ASSERT(ep->vtable == &vtable);
   tcp->release_fd = fd;
   tcp->release_fd_cb = done;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &tcp->last_read_buffer);
-  TCP_UNREF(exec_ctx, tcp, "destroy");
+  grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
+  TCP_UNREF(tcp, "destroy");
 }
 
 #endif
diff --git a/src/core/lib/iomgr/tcp_posix.h b/src/core/lib/iomgr/tcp_posix.h
index 09051b7..4529c02 100644
--- a/src/core/lib/iomgr/tcp_posix.h
+++ b/src/core/lib/iomgr/tcp_posix.h
@@ -37,8 +37,7 @@
 
 /* Create a tcp endpoint given a file desciptor and a read slice size.
    Takes ownership of fd. */
-grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_fd* fd,
-                               const grpc_channel_args* args,
+grpc_endpoint* grpc_tcp_create(grpc_fd* fd, const grpc_channel_args* args,
                                const char* peer_string);
 
 /* Return the tcp endpoint's fd, or -1 if this is not available. Does not
@@ -50,7 +49,7 @@
 /* Destroy the tcp endpoint without closing its fd. *fd will be set and done
  * will be called when the endpoint is destroyed.
  * Requires: ep must be a tcp endpoint and fd must not be NULL. */
-void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                     int* fd, grpc_closure* done);
+void grpc_tcp_destroy_and_release_fd(grpc_endpoint* ep, int* fd,
+                                     grpc_closure* done);
 
 #endif /* GRPC_CORE_LIB_IOMGR_TCP_POSIX_H */
diff --git a/src/core/lib/iomgr/tcp_server.h b/src/core/lib/iomgr/tcp_server.h
index a1757a2..038c765 100644
--- a/src/core/lib/iomgr/tcp_server.h
+++ b/src/core/lib/iomgr/tcp_server.h
@@ -39,22 +39,20 @@
 
 /* Called for newly connected TCP connections.
    Takes ownership of acceptor. */
-typedef void (*grpc_tcp_server_cb)(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_endpoint* ep,
+typedef void (*grpc_tcp_server_cb)(void* arg, grpc_endpoint* ep,
                                    grpc_pollset* accepting_pollset,
                                    grpc_tcp_server_acceptor* acceptor);
 
 /* Create a server, initially not bound to any ports. The caller owns one ref.
    If shutdown_complete is not NULL, it will be used by
    grpc_tcp_server_unref() when the ref count reaches zero. */
-grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
-                                   grpc_closure* shutdown_complete,
+grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    const grpc_channel_args* args,
                                    grpc_tcp_server** server);
 
 /* Start listening to bound ports */
-void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* server,
-                           grpc_pollset** pollsets, size_t pollset_count,
+void grpc_tcp_server_start(grpc_tcp_server* server, grpc_pollset** pollsets,
+                           size_t pollset_count,
                            grpc_tcp_server_cb on_accept_cb, void* cb_arg);
 
 /* Add a port to the server, returning the newly allocated port on success, or
@@ -92,10 +90,9 @@
 
 /* If the refcount drops to zero, enqueue calls on exec_ctx to
    shutdown_listeners and delete s. */
-void grpc_tcp_server_unref(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s);
+void grpc_tcp_server_unref(grpc_tcp_server* s);
 
 /* Shutdown the fds of listeners. */
-void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx* exec_ctx,
-                                        grpc_tcp_server* s);
+void grpc_tcp_server_shutdown_listeners(grpc_tcp_server* s);
 
 #endif /* GRPC_CORE_LIB_IOMGR_TCP_SERVER_H */
diff --git a/src/core/lib/iomgr/tcp_server_posix.cc b/src/core/lib/iomgr/tcp_server_posix.cc
index 6fed13c..99e1c6c 100644
--- a/src/core/lib/iomgr/tcp_server_posix.cc
+++ b/src/core/lib/iomgr/tcp_server_posix.cc
@@ -68,8 +68,7 @@
 #endif
 }
 
-grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
-                                   grpc_closure* shutdown_complete,
+grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    const grpc_channel_args* args,
                                    grpc_tcp_server** server) {
   gpr_once_init(&check_init, init);
@@ -116,12 +115,12 @@
   return GRPC_ERROR_NONE;
 }
 
-static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void finish_shutdown(grpc_tcp_server* s) {
   gpr_mu_lock(&s->mu);
   GPR_ASSERT(s->shutdown);
   gpr_mu_unlock(&s->mu);
   if (s->shutdown_complete != nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->shutdown_complete, GRPC_ERROR_NONE);
   }
 
   gpr_mu_destroy(&s->mu);
@@ -131,19 +130,18 @@
     s->head = sp->next;
     gpr_free(sp);
   }
-  grpc_channel_args_destroy(exec_ctx, s->channel_args);
+  grpc_channel_args_destroy(s->channel_args);
 
   gpr_free(s);
 }
 
-static void destroyed_port(grpc_exec_ctx* exec_ctx, void* server,
-                           grpc_error* error) {
+static void destroyed_port(void* server, grpc_error* error) {
   grpc_tcp_server* s = (grpc_tcp_server*)server;
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
   if (s->destroyed_ports == s->nports) {
     gpr_mu_unlock(&s->mu);
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   } else {
     GPR_ASSERT(s->destroyed_ports < s->nports);
     gpr_mu_unlock(&s->mu);
@@ -153,7 +151,7 @@
 /* called when all listening endpoints have been shutdown, so no further
    events will be received on them - at this point it's safe to destroy
    things */
-static void deactivated_all_ports(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void deactivated_all_ports(grpc_tcp_server* s) {
   /* delete ALL the things */
   gpr_mu_lock(&s->mu);
 
@@ -165,17 +163,17 @@
       grpc_unlink_if_unix_domain_socket(&sp->addr);
       GRPC_CLOSURE_INIT(&sp->destroyed_closure, destroyed_port, s,
                         grpc_schedule_on_exec_ctx);
-      grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, nullptr,
+      grpc_fd_orphan(sp->emfd, &sp->destroyed_closure, nullptr,
                      false /* already_closed */, "tcp_listener_shutdown");
     }
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   }
 }
 
-static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void tcp_server_destroy(grpc_tcp_server* s) {
   gpr_mu_lock(&s->mu);
 
   GPR_ASSERT(!s->shutdown);
@@ -186,18 +184,17 @@
     grpc_tcp_listener* sp;
     for (sp = s->head; sp; sp = sp->next) {
       grpc_fd_shutdown(
-          exec_ctx, sp->emfd,
-          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server destroyed"));
+          sp->emfd, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server destroyed"));
     }
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    deactivated_all_ports(exec_ctx, s);
+    deactivated_all_ports(s);
   }
 }
 
 /* event manager callback when reads are ready */
-static void on_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* err) {
+static void on_read(void* arg, grpc_error* err) {
   grpc_tcp_listener* sp = (grpc_tcp_listener*)arg;
   grpc_pollset* read_notifier_pollset;
   if (err != GRPC_ERROR_NONE) {
@@ -223,7 +220,7 @@
         case EINTR:
           continue;
         case EAGAIN:
-          grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+          grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
           return;
         default:
           gpr_mu_lock(&sp->server->mu);
@@ -249,7 +246,7 @@
 
     grpc_fd* fdobj = grpc_fd_create(fd, name);
 
-    grpc_pollset_add_fd(exec_ctx, read_notifier_pollset, fdobj);
+    grpc_pollset_add_fd(read_notifier_pollset, fdobj);
 
     // Create acceptor.
     grpc_tcp_server_acceptor* acceptor =
@@ -259,8 +256,8 @@
     acceptor->fd_index = sp->fd_index;
 
     sp->server->on_accept_cb(
-        exec_ctx, sp->server->on_accept_cb_arg,
-        grpc_tcp_create(exec_ctx, fdobj, sp->server->channel_args, addr_str),
+        sp->server->on_accept_cb_arg,
+        grpc_tcp_create(fdobj, sp->server->channel_args, addr_str),
         read_notifier_pollset, acceptor);
 
     gpr_free(name);
@@ -273,7 +270,7 @@
   gpr_mu_lock(&sp->server->mu);
   if (0 == --sp->server->active_ports && sp->server->shutdown) {
     gpr_mu_unlock(&sp->server->mu);
-    deactivated_all_ports(exec_ctx, sp->server);
+    deactivated_all_ports(sp->server);
   } else {
     gpr_mu_unlock(&sp->server->mu);
   }
@@ -483,8 +480,8 @@
   return -1;
 }
 
-void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s,
-                           grpc_pollset** pollsets, size_t pollset_count,
+void grpc_tcp_server_start(grpc_tcp_server* s, grpc_pollset** pollsets,
+                           size_t pollset_count,
                            grpc_tcp_server_cb on_accept_cb,
                            void* on_accept_cb_arg) {
   size_t i;
@@ -504,20 +501,20 @@
       GPR_ASSERT(GRPC_LOG_IF_ERROR(
           "clone_port", clone_port(sp, (unsigned)(pollset_count - 1))));
       for (i = 0; i < pollset_count; i++) {
-        grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+        grpc_pollset_add_fd(pollsets[i], sp->emfd);
         GRPC_CLOSURE_INIT(&sp->read_closure, on_read, sp,
                           grpc_schedule_on_exec_ctx);
-        grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+        grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
         s->active_ports++;
         sp = sp->next;
       }
     } else {
       for (i = 0; i < pollset_count; i++) {
-        grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+        grpc_pollset_add_fd(pollsets[i], sp->emfd);
       }
       GRPC_CLOSURE_INIT(&sp->read_closure, on_read, sp,
                         grpc_schedule_on_exec_ctx);
-      grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+      grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
       s->active_ports++;
       sp = sp->next;
     }
@@ -538,25 +535,24 @@
   gpr_mu_unlock(&s->mu);
 }
 
-void grpc_tcp_server_unref(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+void grpc_tcp_server_unref(grpc_tcp_server* s) {
   if (gpr_unref(&s->refs)) {
-    grpc_tcp_server_shutdown_listeners(exec_ctx, s);
+    grpc_tcp_server_shutdown_listeners(s);
     gpr_mu_lock(&s->mu);
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &s->shutdown_starting);
+    GRPC_CLOSURE_LIST_SCHED(&s->shutdown_starting);
     gpr_mu_unlock(&s->mu);
-    tcp_server_destroy(exec_ctx, s);
+    tcp_server_destroy(s);
   }
 }
 
-void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx* exec_ctx,
-                                        grpc_tcp_server* s) {
+void grpc_tcp_server_shutdown_listeners(grpc_tcp_server* s) {
   gpr_mu_lock(&s->mu);
   s->shutdown_listeners = true;
   /* shutdown all fd's */
   if (s->active_ports) {
     grpc_tcp_listener* sp;
     for (sp = s->head; sp; sp = sp->next) {
-      grpc_fd_shutdown(exec_ctx, sp->emfd,
+      grpc_fd_shutdown(sp->emfd,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server shutdown"));
     }
   }
diff --git a/src/core/lib/iomgr/tcp_server_uv.cc b/src/core/lib/iomgr/tcp_server_uv.cc
index 2c76fae..1ac4919 100644
--- a/src/core/lib/iomgr/tcp_server_uv.cc
+++ b/src/core/lib/iomgr/tcp_server_uv.cc
@@ -73,8 +73,7 @@
   grpc_resource_quota* resource_quota;
 };
 
-grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
-                                   grpc_closure* shutdown_complete,
+grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    const grpc_channel_args* args,
                                    grpc_tcp_server** server) {
   grpc_tcp_server* s = (grpc_tcp_server*)gpr_malloc(sizeof(grpc_tcp_server));
@@ -82,11 +81,11 @@
   for (size_t i = 0; i < (args == NULL ? 0 : args->num_args); i++) {
     if (0 == strcmp(GRPC_ARG_RESOURCE_QUOTA, args->args[i].key)) {
       if (args->args[i].type == GRPC_ARG_POINTER) {
-        grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota);
+        grpc_resource_quota_unref_internal(s->resource_quota);
         s->resource_quota = grpc_resource_quota_ref_internal(
             (grpc_resource_quota*)args->args[i].value.pointer.p);
       } else {
-        grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota);
+        grpc_resource_quota_unref_internal(s->resource_quota);
         gpr_free(s);
         return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             GRPC_ARG_RESOURCE_QUOTA " must be a pointer to a buffer pool");
@@ -119,10 +118,10 @@
                            GRPC_ERROR_NONE);
 }
 
-static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void finish_shutdown(grpc_tcp_server* s) {
   GPR_ASSERT(s->shutdown);
   if (s->shutdown_complete != NULL) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->shutdown_complete, GRPC_ERROR_NONE);
   }
 
   while (s->head) {
@@ -132,18 +131,17 @@
     gpr_free(sp->handle);
     gpr_free(sp);
   }
-  grpc_resource_quota_unref_internal(exec_ctx, s->resource_quota);
+  grpc_resource_quota_unref_internal(s->resource_quota);
   gpr_free(s);
 }
 
 static void handle_close_callback(uv_handle_t* handle) {
   grpc_tcp_listener* sp = (grpc_tcp_listener*)handle->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   sp->server->open_ports--;
   if (sp->server->open_ports == 0 && sp->server->shutdown) {
-    finish_shutdown(&exec_ctx, sp->server);
+    finish_shutdown(sp->server);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void close_listener(grpc_tcp_listener* sp) {
@@ -153,7 +151,7 @@
   }
 }
 
-static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void tcp_server_destroy(grpc_tcp_server* s) {
   int immediately_done = 0;
   grpc_tcp_listener* sp;
 
@@ -168,28 +166,22 @@
   }
 
   if (immediately_done) {
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   }
 }
 
-void grpc_tcp_server_unref(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+void grpc_tcp_server_unref(grpc_tcp_server* s) {
   GRPC_UV_ASSERT_SAME_THREAD();
   if (gpr_unref(&s->refs)) {
     /* Complete shutdown_starting work before destroying. */
-    grpc_exec_ctx local_exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_CLOSURE_LIST_SCHED(&local_exec_ctx, &s->shutdown_starting);
-    if (exec_ctx == NULL) {
-      grpc_exec_ctx_flush(&local_exec_ctx);
-      tcp_server_destroy(&local_exec_ctx, s);
-      grpc_exec_ctx_finish(&local_exec_ctx);
-    } else {
-      grpc_exec_ctx_finish(&local_exec_ctx);
-      tcp_server_destroy(exec_ctx, s);
-    }
+    grpc_core::ExecCtx exec_ctx;
+    GRPC_CLOSURE_LIST_SCHED(&s->shutdown_starting);
+    grpc_core::ExecCtx::Get()->Flush();
+    tcp_server_destroy(s);
   }
 }
 
-static void finish_accept(grpc_exec_ctx* exec_ctx, grpc_tcp_listener* sp) {
+static void finish_accept(grpc_tcp_listener* sp) {
   grpc_tcp_server_acceptor* acceptor =
       (grpc_tcp_server_acceptor*)gpr_malloc(sizeof(*acceptor));
   uv_tcp_t* client = NULL;
@@ -225,14 +217,13 @@
   acceptor->from_server = sp->server;
   acceptor->port_index = sp->port_index;
   acceptor->fd_index = 0;
-  sp->server->on_accept_cb(exec_ctx, sp->server->on_accept_cb_arg, ep, NULL,
-                           acceptor);
+  sp->server->on_accept_cb(sp->server->on_accept_cb_arg, ep, NULL, acceptor);
   gpr_free(peer_name_string);
 }
 
 static void on_connect(uv_stream_t* server, int status) {
   grpc_tcp_listener* sp = (grpc_tcp_listener*)server->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   if (status < 0) {
     switch (status) {
@@ -253,22 +244,42 @@
 
   // Create acceptor.
   if (sp->server->on_accept_cb) {
-    finish_accept(&exec_ctx, sp);
+    finish_accept(sp);
   } else {
     sp->has_pending_connection = true;
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static grpc_error* add_socket_to_server(grpc_tcp_server* s, uv_tcp_t* handle,
-                                        const grpc_resolved_address* addr,
-                                        unsigned port_index,
-                                        grpc_tcp_listener** listener) {
+static grpc_error* add_addr_to_server(grpc_tcp_server* s,
+                                      const grpc_resolved_address* addr,
+                                      unsigned port_index,
+                                      grpc_tcp_listener** listener) {
   grpc_tcp_listener* sp = NULL;
   int port = -1;
   int status;
   grpc_error* error;
   grpc_resolved_address sockname_temp;
+  uv_tcp_t* handle = (uv_tcp_t*)gpr_malloc(sizeof(uv_tcp_t));
+  int family = grpc_sockaddr_get_family(addr);
+
+  status = uv_tcp_init_ex(uv_default_loop(), handle, (unsigned int)family);
+#if defined(GPR_LINUX) && defined(SO_REUSEPORT)
+  if (family == AF_INET || family == AF_INET6) {
+    int fd;
+    uv_fileno((uv_handle_t*)handle, &fd);
+    int enable = 1;
+    setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &enable, sizeof(enable));
+  }
+#endif /* GPR_LINUX && SO_REUSEPORT */
+
+  if (status != 0) {
+    error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+        "Failed to initialize UV tcp handle");
+    error =
+        grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR,
+                           grpc_slice_from_static_string(uv_strerror(status)));
+    return error;
+  }
 
   // The last argument to uv_tcp_bind is flags
   status = uv_tcp_bind(handle, (struct sockaddr*)addr->addr, 0);
@@ -325,20 +336,48 @@
   return GRPC_ERROR_NONE;
 }
 
+static grpc_error* add_wildcard_addrs_to_server(grpc_tcp_server* s,
+                                                unsigned port_index,
+                                                int requested_port,
+                                                grpc_tcp_listener** listener) {
+  grpc_resolved_address wild4;
+  grpc_resolved_address wild6;
+  grpc_tcp_listener* sp = nullptr;
+  grpc_tcp_listener* sp2 = nullptr;
+  grpc_error* v6_err = GRPC_ERROR_NONE;
+  grpc_error* v4_err = GRPC_ERROR_NONE;
+
+  grpc_sockaddr_make_wildcards(requested_port, &wild4, &wild6);
+  /* Try listening on IPv6 first. */
+  if ((v6_err = add_addr_to_server(s, &wild6, port_index, &sp)) ==
+      GRPC_ERROR_NONE) {
+    *listener = sp;
+    return GRPC_ERROR_NONE;
+  }
+
+  if ((v4_err = add_addr_to_server(s, &wild4, port_index, &sp2)) ==
+      GRPC_ERROR_NONE) {
+    *listener = sp2;
+    return GRPC_ERROR_NONE;
+  }
+
+  grpc_error* root_err = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+      "Failed to add any wildcard listeners");
+  root_err = grpc_error_add_child(root_err, v6_err);
+  root_err = grpc_error_add_child(root_err, v4_err);
+  return root_err;
+}
+
 grpc_error* grpc_tcp_server_add_port(grpc_tcp_server* s,
                                      const grpc_resolved_address* addr,
                                      int* port) {
   // This function is mostly copied from tcp_server_windows.c
   grpc_tcp_listener* sp = NULL;
-  uv_tcp_t* handle;
   grpc_resolved_address addr6_v4mapped;
-  grpc_resolved_address wildcard;
   grpc_resolved_address* allocated_addr = NULL;
   grpc_resolved_address sockname_temp;
   unsigned port_index = 0;
-  int status;
   grpc_error* error = GRPC_ERROR_NONE;
-  int family;
 
   GRPC_UV_ASSERT_SAME_THREAD();
 
@@ -367,38 +406,15 @@
     }
   }
 
-  if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
-    addr = &addr6_v4mapped;
-  }
-
   /* Treat :: or 0.0.0.0 as a family-agnostic wildcard. */
   if (grpc_sockaddr_is_wildcard(addr, port)) {
-    grpc_sockaddr_make_wildcard6(*port, &wildcard);
-
-    addr = &wildcard;
-  }
-
-  handle = (uv_tcp_t*)gpr_malloc(sizeof(uv_tcp_t));
-
-  family = grpc_sockaddr_get_family(addr);
-  status = uv_tcp_init_ex(uv_default_loop(), handle, (unsigned int)family);
-#if defined(GPR_LINUX) && defined(SO_REUSEPORT)
-  if (family == AF_INET || family == AF_INET6) {
-    int fd;
-    uv_fileno((uv_handle_t*)handle, &fd);
-    int enable = 1;
-    setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &enable, sizeof(enable));
-  }
-#endif /* GPR_LINUX && SO_REUSEPORT */
-
-  if (status == 0) {
-    error = add_socket_to_server(s, handle, addr, port_index, &sp);
+    error = add_wildcard_addrs_to_server(s, port_index, *port, &sp);
   } else {
-    error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
-        "Failed to initialize UV tcp handle");
-    error =
-        grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR,
-                           grpc_slice_from_static_string(uv_strerror(status)));
+    if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
+      addr = &addr6_v4mapped;
+    }
+
+    error = add_addr_to_server(s, addr, port_index, &sp);
   }
 
   gpr_free(allocated_addr);
@@ -428,8 +444,8 @@
   return error;
 }
 
-void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* server,
-                           grpc_pollset** pollsets, size_t pollset_count,
+void grpc_tcp_server_start(grpc_tcp_server* server, grpc_pollset** pollsets,
+                           size_t pollset_count,
                            grpc_tcp_server_cb on_accept_cb, void* cb_arg) {
   grpc_tcp_listener* sp;
   (void)pollsets;
@@ -444,13 +460,12 @@
   server->on_accept_cb_arg = cb_arg;
   for (sp = server->head; sp; sp = sp->next) {
     if (sp->has_pending_connection) {
-      finish_accept(exec_ctx, sp);
+      finish_accept(sp);
       sp->has_pending_connection = false;
     }
   }
 }
 
-void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx* exec_ctx,
-                                        grpc_tcp_server* s) {}
+void grpc_tcp_server_shutdown_listeners(grpc_tcp_server* s) {}
 
 #endif /* GRPC_UV */
diff --git a/src/core/lib/iomgr/tcp_server_windows.cc b/src/core/lib/iomgr/tcp_server_windows.cc
index f538194..8a30dfd 100644
--- a/src/core/lib/iomgr/tcp_server_windows.cc
+++ b/src/core/lib/iomgr/tcp_server_windows.cc
@@ -94,8 +94,7 @@
 
 /* Public function. Allocates the proper data structures to hold a
    grpc_tcp_server. */
-grpc_error* grpc_tcp_server_create(grpc_exec_ctx* exec_ctx,
-                                   grpc_closure* shutdown_complete,
+grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    const grpc_channel_args* args,
                                    grpc_tcp_server** server) {
   grpc_tcp_server* s = (grpc_tcp_server*)gpr_malloc(sizeof(grpc_tcp_server));
@@ -114,8 +113,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_server(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void destroy_server(void* arg, grpc_error* error) {
   grpc_tcp_server* s = (grpc_tcp_server*)arg;
 
   /* Now that the accepts have been aborted, we can destroy the sockets.
@@ -128,18 +126,16 @@
     grpc_winsocket_destroy(sp->socket);
     gpr_free(sp);
   }
-  grpc_channel_args_destroy(exec_ctx, s->channel_args);
+  grpc_channel_args_destroy(s->channel_args);
   gpr_free(s);
 }
 
-static void finish_shutdown_locked(grpc_exec_ctx* exec_ctx,
-                                   grpc_tcp_server* s) {
+static void finish_shutdown_locked(grpc_tcp_server* s) {
   if (s->shutdown_complete != NULL) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->shutdown_complete, GRPC_ERROR_NONE);
   }
 
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_CREATE(destroy_server, s, grpc_schedule_on_exec_ctx),
       GRPC_ERROR_NONE);
 }
@@ -157,14 +153,14 @@
   gpr_mu_unlock(&s->mu);
 }
 
-static void tcp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+static void tcp_server_destroy(grpc_tcp_server* s) {
   grpc_tcp_listener* sp;
   gpr_mu_lock(&s->mu);
 
   /* First, shutdown all fd's. This will queue abortion calls for all
      of the pending accepts due to the normal operation mechanism. */
   if (s->active_ports == 0) {
-    finish_shutdown_locked(exec_ctx, s);
+    finish_shutdown_locked(s);
   } else {
     for (sp = s->head; sp; sp = sp->next) {
       sp->shutting_down = 1;
@@ -174,13 +170,13 @@
   gpr_mu_unlock(&s->mu);
 }
 
-void grpc_tcp_server_unref(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s) {
+void grpc_tcp_server_unref(grpc_tcp_server* s) {
   if (gpr_unref(&s->refs)) {
-    grpc_tcp_server_shutdown_listeners(exec_ctx, s);
+    grpc_tcp_server_shutdown_listeners(s);
     gpr_mu_lock(&s->mu);
-    GRPC_CLOSURE_LIST_SCHED(exec_ctx, &s->shutdown_starting);
+    GRPC_CLOSURE_LIST_SCHED(&s->shutdown_starting);
     gpr_mu_unlock(&s->mu);
-    tcp_server_destroy(exec_ctx, s);
+    tcp_server_destroy(s);
   }
 }
 
@@ -234,19 +230,17 @@
   return error;
 }
 
-static void decrement_active_ports_and_notify_locked(grpc_exec_ctx* exec_ctx,
-                                                     grpc_tcp_listener* sp) {
+static void decrement_active_ports_and_notify_locked(grpc_tcp_listener* sp) {
   sp->shutting_down = 0;
   GPR_ASSERT(sp->server->active_ports > 0);
   if (0 == --sp->server->active_ports) {
-    finish_shutdown_locked(exec_ctx, sp->server);
+    finish_shutdown_locked(sp->server);
   }
 }
 
 /* In order to do an async accept, we need to create a socket first which
    will be the one assigned to the new incoming connection. */
-static grpc_error* start_accept_locked(grpc_exec_ctx* exec_ctx,
-                                       grpc_tcp_listener* port) {
+static grpc_error* start_accept_locked(grpc_tcp_listener* port) {
   SOCKET sock = INVALID_SOCKET;
   BOOL success;
   DWORD addrlen = sizeof(struct sockaddr_in6) + 16;
@@ -285,7 +279,7 @@
   /* We're ready to do the accept. Calling grpc_socket_notify_on_read may
      immediately process an accept that happened in the meantime. */
   port->new_socket = sock;
-  grpc_socket_notify_on_read(exec_ctx, port->socket, &port->on_accept);
+  grpc_socket_notify_on_read(port->socket, &port->on_accept);
   port->outstanding_calls++;
   return error;
 
@@ -296,7 +290,7 @@
 }
 
 /* Event manager callback when reads are ready. */
-static void on_accept(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_accept(void* arg, grpc_error* error) {
   grpc_tcp_listener* sp = (grpc_tcp_listener*)arg;
   SOCKET sock = sp->new_socket;
   grpc_winsocket_callback_info* info = &sp->socket->read_info;
@@ -357,7 +351,7 @@
         gpr_free(utf8_message);
       }
       gpr_asprintf(&fd_name, "tcp_server:%s", peer_name_string);
-      ep = grpc_tcp_create(exec_ctx, grpc_winsocket_create(sock, fd_name),
+      ep = grpc_tcp_create(grpc_winsocket_create(sock, fd_name),
                            sp->server->channel_args, peer_name_string);
       gpr_free(fd_name);
       gpr_free(peer_name_string);
@@ -375,17 +369,15 @@
     acceptor->from_server = sp->server;
     acceptor->port_index = sp->port_index;
     acceptor->fd_index = 0;
-    sp->server->on_accept_cb(exec_ctx, sp->server->on_accept_cb_arg, ep, NULL,
-                             acceptor);
+    sp->server->on_accept_cb(sp->server->on_accept_cb_arg, ep, NULL, acceptor);
   }
   /* As we were notified from the IOCP of one and exactly one accept,
      the former socked we created has now either been destroy or assigned
      to the new connection. We need to create a new one for the next
      connection. */
-  GPR_ASSERT(
-      GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(exec_ctx, sp)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(sp)));
   if (0 == --sp->outstanding_calls) {
-    decrement_active_ports_and_notify_locked(exec_ctx, sp);
+    decrement_active_ports_and_notify_locked(sp);
   }
   gpr_mu_unlock(&sp->server->mu);
 }
@@ -522,8 +514,8 @@
   return error;
 }
 
-void grpc_tcp_server_start(grpc_exec_ctx* exec_ctx, grpc_tcp_server* s,
-                           grpc_pollset** pollset, size_t pollset_count,
+void grpc_tcp_server_start(grpc_tcp_server* s, grpc_pollset** pollset,
+                           size_t pollset_count,
                            grpc_tcp_server_cb on_accept_cb,
                            void* on_accept_cb_arg) {
   grpc_tcp_listener* sp;
@@ -534,14 +526,12 @@
   s->on_accept_cb = on_accept_cb;
   s->on_accept_cb_arg = on_accept_cb_arg;
   for (sp = s->head; sp; sp = sp->next) {
-    GPR_ASSERT(
-        GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(exec_ctx, sp)));
+    GPR_ASSERT(GRPC_LOG_IF_ERROR("start_accept", start_accept_locked(sp)));
     s->active_ports++;
   }
   gpr_mu_unlock(&s->mu);
 }
 
-void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx* exec_ctx,
-                                        grpc_tcp_server* s) {}
+void grpc_tcp_server_shutdown_listeners(grpc_tcp_server* s) {}
 
 #endif /* GRPC_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/tcp_uv.cc b/src/core/lib/iomgr/tcp_uv.cc
index 40f4006..2c26b60 100644
--- a/src/core/lib/iomgr/tcp_uv.cc
+++ b/src/core/lib/iomgr/tcp_uv.cc
@@ -65,19 +65,18 @@
   grpc_pollset* pollset;
 } grpc_tcp;
 
-static void tcp_free(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
-  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
+static void tcp_free(grpc_tcp* tcp) {
+  grpc_resource_user_unref(tcp->resource_user);
   gpr_free(tcp->handle);
   gpr_free(tcp->peer_string);
   gpr_free(tcp);
 }
 
 #ifndef NDEBUG
-#define TCP_UNREF(exec_ctx, tcp, reason) \
-  tcp_unref((exec_ctx), (tcp), (reason), __FILE__, __LINE__)
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
 #define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                      const char* reason, const char* file, int line) {
+static void tcp_unref(grpc_tcp* tcp, const char* reason, const char* file,
+                      int line) {
   if (grpc_tcp_trace.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&tcp->refcount.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -85,7 +84,7 @@
             val - 1);
   }
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -100,11 +99,11 @@
   gpr_ref(&tcp->refcount);
 }
 #else
-#define TCP_UNREF(exec_ctx, tcp, reason) tcp_unref((exec_ctx), (tcp))
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
 #define TCP_REF(tcp, reason) tcp_ref((tcp))
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_unref(grpc_tcp* tcp) {
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -112,15 +111,14 @@
 #endif
 
 static void uv_close_callback(uv_handle_t* handle) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp* tcp = (grpc_tcp*)handle->data;
-  TCP_UNREF(&exec_ctx, tcp, "destroy");
-  grpc_exec_ctx_finish(&exec_ctx);
+  TCP_UNREF(tcp, "destroy");
 }
 
 static void alloc_uv_buf(uv_handle_t* handle, size_t suggested_size,
                          uv_buf_t* buf) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp* tcp = (grpc_tcp*)handle->data;
   (void)suggested_size;
   /* Before calling uv_read_start, we allocate a buffer with exactly one slice
@@ -128,11 +126,9 @@
    * allocation was successful. So slices[0] should always exist here */
   buf->base = (char*)GRPC_SLICE_START_PTR(tcp->read_slices->slices[0]);
   buf->len = GRPC_SLICE_LENGTH(tcp->read_slices->slices[0]);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void call_read_cb(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                         grpc_error* error) {
+static void call_read_cb(grpc_tcp* tcp, grpc_error* error) {
   grpc_closure* cb = tcp->read_cb;
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p call_cb %p %p:%p", tcp, cb, cb->cb, cb->cb_arg);
@@ -149,25 +145,25 @@
   }
   tcp->read_slices = NULL;
   tcp->read_cb = NULL;
-  GRPC_CLOSURE_RUN(exec_ctx, cb, error);
+  GRPC_CLOSURE_RUN(cb, error);
 }
 
 static void read_callback(uv_stream_t* stream, ssize_t nread,
                           const uv_buf_t* buf) {
   grpc_error* error;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp* tcp = (grpc_tcp*)stream->data;
   grpc_slice_buffer garbage;
   if (nread == 0) {
     // Nothing happened. Wait for the next callback
     return;
   }
-  TCP_UNREF(&exec_ctx, tcp, "read");
+  TCP_UNREF(tcp, "read");
   // TODO(murgatroid99): figure out what the return value here means
   uv_read_stop(stream);
   if (nread == UV_EOF) {
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("EOF");
-    grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, tcp->read_slices);
+    grpc_slice_buffer_reset_and_unref_internal(tcp->read_slices);
   } else if (nread > 0) {
     // Successful read
     error = GRPC_ERROR_NONE;
@@ -177,19 +173,17 @@
       grpc_slice_buffer_init(&garbage);
       grpc_slice_buffer_trim_end(
           tcp->read_slices, tcp->read_slices->length - (size_t)nread, &garbage);
-      grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, &garbage);
+      grpc_slice_buffer_reset_and_unref_internal(&garbage);
     }
   } else {
     // nread < 0: Error
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("TCP Read failed");
-    grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, tcp->read_slices);
+    grpc_slice_buffer_reset_and_unref_internal(tcp->read_slices);
   }
-  call_read_cb(&exec_ctx, tcp, error);
-  grpc_exec_ctx_finish(&exec_ctx);
+  call_read_cb(tcp, error);
 }
 
-static void tcp_read_allocation_done(grpc_exec_ctx* exec_ctx, void* tcpp,
-                                     grpc_error* error) {
+static void tcp_read_allocation_done(void* tcpp, grpc_error* error) {
   int status;
   grpc_tcp* tcp = (grpc_tcp*)tcpp;
   if (grpc_tcp_trace.enabled()) {
@@ -207,9 +201,9 @@
     }
   }
   if (error != GRPC_ERROR_NONE) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, tcp->read_slices);
-    call_read_cb(exec_ctx, tcp, GRPC_ERROR_REF(error));
-    TCP_UNREF(exec_ctx, tcp, "read");
+    grpc_slice_buffer_reset_and_unref_internal(tcp->read_slices);
+    call_read_cb(tcp, GRPC_ERROR_REF(error));
+    TCP_UNREF(tcp, "read");
   }
   if (grpc_tcp_trace.enabled()) {
     const char* str = grpc_error_string(error);
@@ -217,16 +211,16 @@
   }
 }
 
-static void uv_endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                             grpc_slice_buffer* read_slices, grpc_closure* cb) {
+static void uv_endpoint_read(grpc_endpoint* ep, grpc_slice_buffer* read_slices,
+                             grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   GRPC_UV_ASSERT_SAME_THREAD();
   GPR_ASSERT(tcp->read_cb == NULL);
   tcp->read_cb = cb;
   tcp->read_slices = read_slices;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, read_slices);
+  grpc_slice_buffer_reset_and_unref_internal(read_slices);
   TCP_REF(tcp, "read");
-  grpc_resource_user_alloc_slices(exec_ctx, &tcp->slice_allocator,
+  grpc_resource_user_alloc_slices(&tcp->slice_allocator,
                                   GRPC_TCP_DEFAULT_READ_SLICE_SIZE, 1,
                                   tcp->read_slices);
 }
@@ -234,10 +228,10 @@
 static void write_callback(uv_write_t* req, int status) {
   grpc_tcp* tcp = (grpc_tcp*)req->data;
   grpc_error* error;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure* cb = tcp->write_cb;
   tcp->write_cb = NULL;
-  TCP_UNREF(&exec_ctx, tcp, "write");
+  TCP_UNREF(tcp, "write");
   if (status == 0) {
     error = GRPC_ERROR_NONE;
   } else {
@@ -248,11 +242,10 @@
     gpr_log(GPR_DEBUG, "write complete on %p: error=%s", tcp, str);
   }
   gpr_free(tcp->write_buffers);
-  GRPC_CLOSURE_SCHED(&exec_ctx, cb, error);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CLOSURE_SCHED(cb, error);
 }
 
-static void uv_endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void uv_endpoint_write(grpc_endpoint* ep,
                               grpc_slice_buffer* write_slices,
                               grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
@@ -275,9 +268,8 @@
   }
 
   if (tcp->shutting_down) {
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("TCP socket is shutting down"));
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                               "TCP socket is shutting down"));
     return;
   }
 
@@ -287,7 +279,7 @@
   if (tcp->write_slices->count == 0) {
     // No slices means we don't have to do anything,
     // and libuv doesn't like empty writes
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
     return;
   }
 
@@ -308,37 +300,31 @@
            write_callback);
 }
 
-static void uv_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                              grpc_pollset* pollset) {
+static void uv_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
   // No-op. We're ignoring pollsets currently
-  (void)exec_ctx;
   (void)ep;
   (void)pollset;
   grpc_tcp* tcp = (grpc_tcp*)ep;
   tcp->pollset = pollset;
 }
 
-static void uv_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void uv_add_to_pollset_set(grpc_endpoint* ep,
                                   grpc_pollset_set* pollset) {
   // No-op. We're ignoring pollsets currently
-  (void)exec_ctx;
   (void)ep;
   (void)pollset;
 }
 
-static void uv_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_endpoint* ep,
+static void uv_delete_from_pollset_set(grpc_endpoint* ep,
                                        grpc_pollset_set* pollset) {
   // No-op. We're ignoring pollsets currently
-  (void)exec_ctx;
   (void)ep;
   (void)pollset;
 }
 
 static void shutdown_callback(uv_shutdown_t* req, int status) {}
 
-static void uv_endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                 grpc_error* why) {
+static void uv_endpoint_shutdown(grpc_endpoint* ep, grpc_error* why) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   if (!tcp->shutting_down) {
     if (grpc_tcp_trace.enabled()) {
@@ -348,12 +334,12 @@
     tcp->shutting_down = true;
     uv_shutdown_t* req = &tcp->shutdown_req;
     uv_shutdown(req, (uv_stream_t*)tcp->handle, shutdown_callback);
-    grpc_resource_user_shutdown(exec_ctx, tcp->resource_user);
+    grpc_resource_user_shutdown(tcp->resource_user);
   }
   GRPC_ERROR_UNREF(why);
 }
 
-static void uv_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void uv_destroy(grpc_endpoint* ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp* tcp = (grpc_tcp*)ep;
   uv_close((uv_handle_t*)tcp->handle, uv_close_callback);
@@ -386,7 +372,7 @@
                                grpc_resource_quota* resource_quota,
                                char* peer_string) {
   grpc_tcp* tcp = (grpc_tcp*)gpr_malloc(sizeof(grpc_tcp));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "Creating TCP endpoint %p", tcp);
@@ -413,7 +399,6 @@
   uv_unref((uv_handle_t*)handle);
 #endif
 
-  grpc_exec_ctx_finish(&exec_ctx);
   return &tcp->base;
 }
 
diff --git a/src/core/lib/iomgr/tcp_windows.cc b/src/core/lib/iomgr/tcp_windows.cc
index 33868cd..6d091b7 100644
--- a/src/core/lib/iomgr/tcp_windows.cc
+++ b/src/core/lib/iomgr/tcp_windows.cc
@@ -109,21 +109,20 @@
   char* peer_string;
 } grpc_tcp;
 
-static void tcp_free(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_free(grpc_tcp* tcp) {
   grpc_winsocket_destroy(tcp->socket);
   gpr_mu_destroy(&tcp->mu);
   gpr_free(tcp->peer_string);
-  grpc_resource_user_unref(exec_ctx, tcp->resource_user);
+  grpc_resource_user_unref(tcp->resource_user);
   if (tcp->shutting_down) GRPC_ERROR_UNREF(tcp->shutdown_error);
   gpr_free(tcp);
 }
 
 #ifndef NDEBUG
-#define TCP_UNREF(exec_ctx, tcp, reason) \
-  tcp_unref((exec_ctx), (tcp), (reason), __FILE__, __LINE__)
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
 #define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp,
-                      const char* reason, const char* file, int line) {
+static void tcp_unref(grpc_tcp* tcp, const char* reason, const char* file,
+                      int line) {
   if (grpc_tcp_trace.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&tcp->refcount.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -131,7 +130,7 @@
             val - 1);
   }
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -146,11 +145,11 @@
   gpr_ref(&tcp->refcount);
 }
 #else
-#define TCP_UNREF(exec_ctx, tcp, reason) tcp_unref((exec_ctx), (tcp))
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
 #define TCP_REF(tcp, reason) tcp_ref((tcp))
-static void tcp_unref(grpc_exec_ctx* exec_ctx, grpc_tcp* tcp) {
+static void tcp_unref(grpc_tcp* tcp) {
   if (gpr_unref(&tcp->refcount)) {
-    tcp_free(exec_ctx, tcp);
+    tcp_free(tcp);
   }
 }
 
@@ -158,7 +157,7 @@
 #endif
 
 /* Asynchronous callback from the IOCP, or the background thread. */
-static void on_read(grpc_exec_ctx* exec_ctx, void* tcpp, grpc_error* error) {
+static void on_read(void* tcpp, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)tcpp;
   grpc_closure* cb = tcp->read_cb;
   grpc_winsocket* socket = tcp->socket;
@@ -172,13 +171,13 @@
       char* utf8_message = gpr_format_message(info->wsa_error);
       error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(utf8_message);
       gpr_free(utf8_message);
-      grpc_slice_unref_internal(exec_ctx, tcp->read_slice);
+      grpc_slice_unref_internal(tcp->read_slice);
     } else {
       if (info->bytes_transfered != 0 && !tcp->shutting_down) {
         sub = grpc_slice_sub_no_ref(tcp->read_slice, 0, info->bytes_transfered);
         grpc_slice_buffer_add(tcp->read_slices, sub);
       } else {
-        grpc_slice_unref_internal(exec_ctx, tcp->read_slice);
+        grpc_slice_unref_internal(tcp->read_slice);
         error = tcp->shutting_down
                     ? GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                           "TCP stream shutting down", &tcp->shutdown_error, 1)
@@ -188,12 +187,12 @@
   }
 
   tcp->read_cb = NULL;
-  TCP_UNREF(exec_ctx, tcp, "read");
-  GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+  TCP_UNREF(tcp, "read");
+  GRPC_CLOSURE_SCHED(cb, error);
 }
 
-static void win_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* read_slices, grpc_closure* cb) {
+static void win_read(grpc_endpoint* ep, grpc_slice_buffer* read_slices,
+                     grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   grpc_winsocket* handle = tcp->socket;
   grpc_winsocket_callback_info* info = &handle->read_info;
@@ -204,15 +203,14 @@
 
   if (tcp->shutting_down) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-            "TCP socket is shutting down", &tcp->shutdown_error, 1));
+        cb, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                "TCP socket is shutting down", &tcp->shutdown_error, 1));
     return;
   }
 
   tcp->read_cb = cb;
   tcp->read_slices = read_slices;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, read_slices);
+  grpc_slice_buffer_reset_and_unref_internal(read_slices);
 
   tcp->read_slice = GRPC_SLICE_MALLOC(8192);
 
@@ -230,7 +228,7 @@
   /* Did we get data immediately ? Yay. */
   if (info->wsa_error != WSAEWOULDBLOCK) {
     info->bytes_transfered = bytes_read;
-    GRPC_CLOSURE_SCHED(exec_ctx, &tcp->on_read, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&tcp->on_read, GRPC_ERROR_NONE);
     return;
   }
 
@@ -243,17 +241,17 @@
     int wsa_error = WSAGetLastError();
     if (wsa_error != WSA_IO_PENDING) {
       info->wsa_error = wsa_error;
-      GRPC_CLOSURE_SCHED(exec_ctx, &tcp->on_read,
+      GRPC_CLOSURE_SCHED(&tcp->on_read,
                          GRPC_WSA_ERROR(info->wsa_error, "WSARecv"));
       return;
     }
   }
 
-  grpc_socket_notify_on_read(exec_ctx, tcp->socket, &tcp->on_read);
+  grpc_socket_notify_on_read(tcp->socket, &tcp->on_read);
 }
 
 /* Asynchronous callback from the IOCP, or the background thread. */
-static void on_write(grpc_exec_ctx* exec_ctx, void* tcpp, grpc_error* error) {
+static void on_write(void* tcpp, grpc_error* error) {
   grpc_tcp* tcp = (grpc_tcp*)tcpp;
   grpc_winsocket* handle = tcp->socket;
   grpc_winsocket_callback_info* info = &handle->write_info;
@@ -274,13 +272,13 @@
     }
   }
 
-  TCP_UNREF(exec_ctx, tcp, "write");
-  GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+  TCP_UNREF(tcp, "write");
+  GRPC_CLOSURE_SCHED(cb, error);
 }
 
 /* Initiates a write. */
-static void win_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                      grpc_slice_buffer* slices, grpc_closure* cb) {
+static void win_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                      grpc_closure* cb) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   grpc_winsocket* socket = tcp->socket;
   grpc_winsocket_callback_info* info = &socket->write_info;
@@ -294,9 +292,8 @@
 
   if (tcp->shutting_down) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-            "TCP socket is shutting down", &tcp->shutdown_error, 1));
+        cb, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                "TCP socket is shutting down", &tcp->shutdown_error, 1));
     return;
   }
 
@@ -327,7 +324,7 @@
     grpc_error* error = status == 0
                             ? GRPC_ERROR_NONE
                             : GRPC_WSA_ERROR(info->wsa_error, "WSASend");
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+    GRPC_CLOSURE_SCHED(cb, error);
     if (allocated) gpr_free(allocated);
     return;
   }
@@ -344,35 +341,32 @@
   if (status != 0) {
     int wsa_error = WSAGetLastError();
     if (wsa_error != WSA_IO_PENDING) {
-      TCP_UNREF(exec_ctx, tcp, "write");
-      GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_WSA_ERROR(wsa_error, "WSASend"));
+      TCP_UNREF(tcp, "write");
+      GRPC_CLOSURE_SCHED(cb, GRPC_WSA_ERROR(wsa_error, "WSASend"));
       return;
     }
   }
 
   /* As all is now setup, we can now ask for the IOCP notification. It may
      trigger the callback immediately however, but no matter. */
-  grpc_socket_notify_on_write(exec_ctx, socket, &tcp->on_write);
+  grpc_socket_notify_on_write(socket, &tcp->on_write);
 }
 
-static void win_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                               grpc_pollset* ps) {
+static void win_add_to_pollset(grpc_endpoint* ep, grpc_pollset* ps) {
   grpc_tcp* tcp;
   (void)ps;
   tcp = (grpc_tcp*)ep;
   grpc_iocp_add_socket(tcp->socket);
 }
 
-static void win_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                   grpc_pollset_set* pss) {
+static void win_add_to_pollset_set(grpc_endpoint* ep, grpc_pollset_set* pss) {
   grpc_tcp* tcp;
   (void)pss;
   tcp = (grpc_tcp*)ep;
   grpc_iocp_add_socket(tcp->socket);
 }
 
-static void win_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_endpoint* ep,
+static void win_delete_from_pollset_set(grpc_endpoint* ep,
                                         grpc_pollset_set* pss) {}
 
 /* Initiates a shutdown of the TCP endpoint. This will queue abort callbacks
@@ -381,8 +375,7 @@
    we're not going to protect against these. However the IO Completion Port
    callback will happen from another thread, so we need to protect against
    concurrent access of the data structure in that regard. */
-static void win_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                         grpc_error* why) {
+static void win_shutdown(grpc_endpoint* ep, grpc_error* why) {
   grpc_tcp* tcp = (grpc_tcp*)ep;
   gpr_mu_lock(&tcp->mu);
   /* At that point, what may happen is that we're already inside the IOCP
@@ -395,13 +388,13 @@
   }
   grpc_winsocket_shutdown(tcp->socket);
   gpr_mu_unlock(&tcp->mu);
-  grpc_resource_user_shutdown(exec_ctx, tcp->resource_user);
+  grpc_resource_user_shutdown(tcp->resource_user);
 }
 
-static void win_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void win_destroy(grpc_endpoint* ep) {
   grpc_network_status_unregister_endpoint(ep);
   grpc_tcp* tcp = (grpc_tcp*)ep;
-  TCP_UNREF(exec_ctx, tcp, "destroy");
+  TCP_UNREF(tcp, "destroy");
 }
 
 static char* win_get_peer(grpc_endpoint* ep) {
@@ -427,14 +420,14 @@
                                       win_get_peer,
                                       win_get_fd};
 
-grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
+grpc_endpoint* grpc_tcp_create(grpc_winsocket* socket,
                                grpc_channel_args* channel_args,
                                const char* peer_string) {
   grpc_resource_quota* resource_quota = grpc_resource_quota_create(NULL);
   if (channel_args != NULL) {
     for (size_t i = 0; i < channel_args->num_args; i++) {
       if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
-        grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+        grpc_resource_quota_unref_internal(resource_quota);
         resource_quota = grpc_resource_quota_ref_internal(
             (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
       }
@@ -452,7 +445,7 @@
   tcp->resource_user = grpc_resource_user_create(resource_quota, peer_string);
   /* Tell network status tracking code about the new endpoint */
   grpc_network_status_register_endpoint(&tcp->base);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 
   return &tcp->base;
 }
diff --git a/src/core/lib/iomgr/tcp_windows.h b/src/core/lib/iomgr/tcp_windows.h
index 28287e2..8578a35 100644
--- a/src/core/lib/iomgr/tcp_windows.h
+++ b/src/core/lib/iomgr/tcp_windows.h
@@ -38,7 +38,7 @@
 /* Create a tcp endpoint given a winsock handle.
  * Takes ownership of the handle.
  */
-grpc_endpoint* grpc_tcp_create(grpc_exec_ctx* exec_ctx, grpc_winsocket* socket,
+grpc_endpoint* grpc_tcp_create(grpc_winsocket* socket,
                                grpc_channel_args* channel_args,
                                const char* peer_string);
 
diff --git a/src/core/lib/iomgr/timer.h b/src/core/lib/iomgr/timer.h
index b9acce2..8204985 100644
--- a/src/core/lib/iomgr/timer.h
+++ b/src/core/lib/iomgr/timer.h
@@ -40,8 +40,8 @@
    application code should check the error to determine how it was invoked. The
    application callback is also responsible for maintaining information about
    when to free up any user-level state. */
-void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
-                     grpc_millis deadline, grpc_closure* closure);
+void grpc_timer_init(grpc_timer* timer, grpc_millis deadline,
+                     grpc_closure* closure);
 
 /* Initialize *timer without setting it. This can later be passed through
    the regular init or cancel */
@@ -73,7 +73,7 @@
    matches this aim.
 
    Requires: cancel() must happen after init() on a given timer */
-void grpc_timer_cancel(grpc_exec_ctx* exec_ctx, grpc_timer* timer);
+void grpc_timer_cancel(grpc_timer* timer);
 
 /* iomgr internal api for dealing with timers */
 
@@ -90,10 +90,9 @@
    *next is never guaranteed to be updated on any given execution; however,
    with high probability at least one thread in the system will see an update
    at any time slice. */
-grpc_timer_check_result grpc_timer_check(grpc_exec_ctx* exec_ctx,
-                                         grpc_millis* next);
-void grpc_timer_list_init(grpc_exec_ctx* exec_ctx);
-void grpc_timer_list_shutdown(grpc_exec_ctx* exec_ctx);
+grpc_timer_check_result grpc_timer_check(grpc_millis* next);
+void grpc_timer_list_init();
+void grpc_timer_list_shutdown();
 
 /* Consume a kick issued by grpc_kick_poller */
 void grpc_timer_consume_kick(void);
diff --git a/src/core/lib/iomgr/timer_generic.cc b/src/core/lib/iomgr/timer_generic.cc
index fa95c43..103144e 100644
--- a/src/core/lib/iomgr/timer_generic.cc
+++ b/src/core/lib/iomgr/timer_generic.cc
@@ -225,8 +225,7 @@
   return a + b;
 }
 
-static grpc_timer_check_result run_some_expired_timers(grpc_exec_ctx* exec_ctx,
-                                                       gpr_atm now,
+static grpc_timer_check_result run_some_expired_timers(gpr_atm now,
                                                        gpr_atm* next,
                                                        grpc_error* error);
 
@@ -236,7 +235,7 @@
              : grpc_timer_heap_top(&shard->heap)->deadline;
 }
 
-void grpc_timer_list_init(grpc_exec_ctx* exec_ctx) {
+void grpc_timer_list_init() {
   uint32_t i;
 
   g_num_shards = GPR_MIN(1, 2 * gpr_cpu_num_cores());
@@ -247,7 +246,7 @@
   g_shared_mutables.initialized = true;
   g_shared_mutables.checker_mu = GPR_SPINLOCK_INITIALIZER;
   gpr_mu_init(&g_shared_mutables.mu);
-  g_shared_mutables.min_timer = grpc_exec_ctx_now(exec_ctx);
+  g_shared_mutables.min_timer = grpc_core::ExecCtx::Get()->Now();
   gpr_tls_init(&g_last_seen_min_timer);
   gpr_tls_set(&g_last_seen_min_timer, 0);
 
@@ -267,10 +266,10 @@
   INIT_TIMER_HASH_TABLE();
 }
 
-void grpc_timer_list_shutdown(grpc_exec_ctx* exec_ctx) {
+void grpc_timer_list_shutdown() {
   size_t i;
   run_some_expired_timers(
-      exec_ctx, GPR_ATM_MAX, nullptr,
+      GPR_ATM_MAX, nullptr,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Timer list shutdown"));
   for (i = 0; i < g_num_shards; i++) {
     timer_shard* shard = &g_shards[i];
@@ -323,8 +322,8 @@
 
 void grpc_timer_init_unset(grpc_timer* timer) { timer->pending = false; }
 
-void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
-                     grpc_millis deadline, grpc_closure* closure) {
+void grpc_timer_init(grpc_timer* timer, grpc_millis deadline,
+                     grpc_closure* closure) {
   int is_first_timer = 0;
   timer_shard* shard = &g_shards[GPR_HASH_POINTER(timer, g_num_shards)];
   timer->closure = closure;
@@ -337,12 +336,12 @@
   if (grpc_timer_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "TIMER %p: SET %" PRIdPTR " now %" PRIdPTR " call %p[%p]", timer,
-            deadline, grpc_exec_ctx_now(exec_ctx), closure, closure->cb);
+            deadline, grpc_core::ExecCtx::Get()->Now(), closure, closure->cb);
   }
 
   if (!g_shared_mutables.initialized) {
     timer->pending = false;
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure,
+    GRPC_CLOSURE_SCHED(timer->closure,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                            "Attempt to create timer before initialization"));
     return;
@@ -350,10 +349,10 @@
 
   gpr_mu_lock(&shard->mu);
   timer->pending = true;
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   if (deadline <= now) {
     timer->pending = false;
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_NONE);
     gpr_mu_unlock(&shard->mu);
     /* early out */
     return;
@@ -414,7 +413,7 @@
   gpr_tls_set(&g_last_seen_min_timer, 0);
 }
 
-void grpc_timer_cancel(grpc_exec_ctx* exec_ctx, grpc_timer* timer) {
+void grpc_timer_cancel(grpc_timer* timer) {
   if (!g_shared_mutables.initialized) {
     /* must have already been cancelled, also the shard mutex is invalid */
     return;
@@ -430,7 +429,7 @@
   if (timer->pending) {
     REMOVE_FROM_HASH_TABLE(timer);
 
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_CANCELLED);
     timer->pending = false;
     if (timer->heap_index == INVALID_HEAP_INDEX) {
       list_remove(timer);
@@ -516,15 +515,14 @@
 }
 
 /* REQUIRES: shard->mu unlocked */
-static size_t pop_timers(grpc_exec_ctx* exec_ctx, timer_shard* shard,
-                         gpr_atm now, gpr_atm* new_min_deadline,
-                         grpc_error* error) {
+static size_t pop_timers(timer_shard* shard, gpr_atm now,
+                         gpr_atm* new_min_deadline, grpc_error* error) {
   size_t n = 0;
   grpc_timer* timer;
   gpr_mu_lock(&shard->mu);
   while ((timer = pop_one(shard, now))) {
     REMOVE_FROM_HASH_TABLE(timer);
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_REF(error));
     n++;
   }
   *new_min_deadline = compute_min_deadline(shard);
@@ -536,8 +534,7 @@
   return n;
 }
 
-static grpc_timer_check_result run_some_expired_timers(grpc_exec_ctx* exec_ctx,
-                                                       gpr_atm now,
+static grpc_timer_check_result run_some_expired_timers(gpr_atm now,
                                                        gpr_atm* next,
                                                        grpc_error* error) {
   grpc_timer_check_result result = GRPC_TIMERS_NOT_CHECKED;
@@ -566,8 +563,7 @@
       /* For efficiency, we pop as many available timers as we can from the
          shard.  This may violate perfect timer deadline ordering, but that
          shouldn't be a big deal because we don't make ordering guarantees. */
-      if (pop_timers(exec_ctx, g_shard_queue[0], now, &new_min_deadline,
-                     error) > 0) {
+      if (pop_timers(g_shard_queue[0], now, &new_min_deadline, error) > 0) {
         result = GRPC_TIMERS_FIRED;
       }
 
@@ -604,10 +600,9 @@
   return result;
 }
 
-grpc_timer_check_result grpc_timer_check(grpc_exec_ctx* exec_ctx,
-                                         grpc_millis* next) {
+grpc_timer_check_result grpc_timer_check(grpc_millis* next) {
   // prelude
-  grpc_millis now = grpc_exec_ctx_now(exec_ctx);
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
 
   /* fetch from a thread-local first: this avoids contention on a globally
      mutable cacheline in the common case */
@@ -646,7 +641,7 @@
   }
   // actual code
   grpc_timer_check_result r =
-      run_some_expired_timers(exec_ctx, now, next, shutdown_error);
+      run_some_expired_timers(now, next, shutdown_error);
   // tracing
   if (grpc_timer_check_trace.enabled()) {
     char* next_str;
diff --git a/src/core/lib/iomgr/timer_manager.cc b/src/core/lib/iomgr/timer_manager.cc
index b68088e..7fb068f 100644
--- a/src/core/lib/iomgr/timer_manager.cc
+++ b/src/core/lib/iomgr/timer_manager.cc
@@ -93,18 +93,17 @@
   // to leak through g_completed_threads and be freed in gc_completed_threads()
   // before "&ct->t" is written to, causing a use-after-free.
   gpr_mu_lock(&g_mu);
-  gpr_thd_new(&ct->t, timer_thread, ct, &opt);
+  gpr_thd_new(&ct->t, "grpc_global_timer", timer_thread, ct, &opt);
   gpr_mu_unlock(&g_mu);
 }
 
 void grpc_timer_manager_tick() {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_millis next = GRPC_MILLIS_INF_FUTURE;
-  grpc_timer_check(&exec_ctx, &next);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_check(&next);
 }
 
-static void run_some_timers(grpc_exec_ctx* exec_ctx) {
+static void run_some_timers() {
   // if there's something to execute...
   gpr_mu_lock(&g_mu);
   // remove a waiter from the pool, and start another thread if necessary
@@ -126,7 +125,7 @@
   if (grpc_timer_check_trace.enabled()) {
     gpr_log(GPR_DEBUG, "flush exec_ctx");
   }
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(&g_mu);
   // garbage collect any threads hanging out that are dead
   gc_completed_threads();
@@ -138,7 +137,7 @@
 // wait until 'next' (or forever if there is already a timed waiter in the pool)
 // returns true if the thread should continue executing (false if it should
 // shutdown)
-static bool wait_until(grpc_exec_ctx* exec_ctx, grpc_millis next) {
+static bool wait_until(grpc_millis next) {
   gpr_mu_lock(&g_mu);
   // if we're not threaded anymore, leave
   if (!g_threaded) {
@@ -179,7 +178,7 @@
         g_timed_waiter_deadline = next;
 
         if (grpc_timer_check_trace.enabled()) {
-          grpc_millis wait_time = next - grpc_exec_ctx_now(exec_ctx);
+          grpc_millis wait_time = next - grpc_core::ExecCtx::Get()->Now();
           gpr_log(GPR_DEBUG, "sleep for a %" PRIdPTR " milliseconds",
                   wait_time);
         }
@@ -220,15 +219,15 @@
   return true;
 }
 
-static void timer_main_loop(grpc_exec_ctx* exec_ctx) {
+static void timer_main_loop() {
   for (;;) {
     grpc_millis next = GRPC_MILLIS_INF_FUTURE;
-    grpc_exec_ctx_invalidate_now(exec_ctx);
+    grpc_core::ExecCtx::Get()->InvalidateNow();
 
     // check timer state, updates next to the next time to run a check
-    switch (grpc_timer_check(exec_ctx, &next)) {
+    switch (grpc_timer_check(&next)) {
       case GRPC_TIMERS_FIRED:
-        run_some_timers(exec_ctx);
+        run_some_timers();
         break;
       case GRPC_TIMERS_NOT_CHECKED:
         /* This case only happens under contention, meaning more than one timer
@@ -246,7 +245,7 @@
         next = GRPC_MILLIS_INF_FUTURE;
       /* fall through */
       case GRPC_TIMERS_CHECKED_AND_EMPTY:
-        if (!wait_until(exec_ctx, next)) {
+        if (!wait_until(next)) {
           return;
         }
         break;
@@ -274,10 +273,9 @@
 static void timer_thread(void* completed_thread_ptr) {
   // this threads exec_ctx: we try to run things through to completion here
   // since it's easy to spin up new threads
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, nullptr);
-  timer_main_loop(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx(0);
+  timer_main_loop();
+
   timer_thread_cleanup((completed_thread*)completed_thread_ptr);
 }
 
diff --git a/src/core/lib/iomgr/timer_uv.cc b/src/core/lib/iomgr/timer_uv.cc
index fac2026..5d238da 100644
--- a/src/core/lib/iomgr/timer_uv.cc
+++ b/src/core/lib/iomgr/timer_uv.cc
@@ -42,28 +42,27 @@
 
 void run_expired_timer(uv_timer_t* handle) {
   grpc_timer* timer = (grpc_timer*)handle->data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_UV_ASSERT_SAME_THREAD();
   GPR_ASSERT(timer->pending);
   timer->pending = 0;
-  GRPC_CLOSURE_SCHED(&exec_ctx, timer->closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_NONE);
   stop_uv_timer(handle);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-void grpc_timer_init(grpc_exec_ctx* exec_ctx, grpc_timer* timer,
-                     grpc_millis deadline, grpc_closure* closure) {
+void grpc_timer_init(grpc_timer* timer, grpc_millis deadline,
+                     grpc_closure* closure) {
   uint64_t timeout;
   uv_timer_t* uv_timer;
   GRPC_UV_ASSERT_SAME_THREAD();
   timer->closure = closure;
-  if (deadline <= grpc_exec_ctx_now(exec_ctx)) {
+  if (deadline <= grpc_core::ExecCtx::Get()->Now()) {
     timer->pending = 0;
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_NONE);
     return;
   }
   timer->pending = 1;
-  timeout = (uint64_t)(deadline - grpc_exec_ctx_now(exec_ctx));
+  timeout = (uint64_t)(deadline - grpc_core::ExecCtx::Get()->Now());
   uv_timer = (uv_timer_t*)gpr_malloc(sizeof(uv_timer_t));
   uv_timer_init(uv_default_loop(), uv_timer);
   uv_timer->data = timer;
@@ -77,22 +76,21 @@
 
 void grpc_timer_init_unset(grpc_timer* timer) { timer->pending = 0; }
 
-void grpc_timer_cancel(grpc_exec_ctx* exec_ctx, grpc_timer* timer) {
+void grpc_timer_cancel(grpc_timer* timer) {
   GRPC_UV_ASSERT_SAME_THREAD();
   if (timer->pending) {
     timer->pending = 0;
-    GRPC_CLOSURE_SCHED(exec_ctx, timer->closure, GRPC_ERROR_CANCELLED);
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_CANCELLED);
     stop_uv_timer((uv_timer_t*)timer->uv_timer);
   }
 }
 
-grpc_timer_check_result grpc_timer_check(grpc_exec_ctx* exec_ctx,
-                                         grpc_millis* next) {
+grpc_timer_check_result grpc_timer_check(grpc_millis* next) {
   return GRPC_TIMERS_NOT_CHECKED;
 }
 
-void grpc_timer_list_init(grpc_exec_ctx* exec_ctx) {}
-void grpc_timer_list_shutdown(grpc_exec_ctx* exec_ctx) {}
+void grpc_timer_list_init() {}
+void grpc_timer_list_shutdown() {}
 
 void grpc_timer_consume_kick(void) {}
 
diff --git a/src/core/lib/iomgr/udp_server.cc b/src/core/lib/iomgr/udp_server.cc
index 68ab935..55e0b16 100644
--- a/src/core/lib/iomgr/udp_server.cc
+++ b/src/core/lib/iomgr/udp_server.cc
@@ -47,6 +47,7 @@
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/iomgr/executor.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
@@ -71,14 +72,22 @@
   grpc_udp_server_read_cb read_cb;
   grpc_udp_server_write_cb write_cb;
   grpc_udp_server_orphan_cb orphan_cb;
+  // To be scheduled on another thread to actually read/write.
+  grpc_closure do_read_closure;
+  grpc_closure do_write_closure;
+  grpc_closure notify_on_write_closure;
   // True if orphan_cb is trigered.
   bool orphan_notified;
+  // True if grpc_fd_notify_on_write() is called after on_write() call.
+  bool notify_on_write_armed;
+  // True if fd has been shutdown.
+  bool already_shutdown;
 
   struct grpc_udp_listener* next;
 };
 
 struct shutdown_fd_args {
-  grpc_fd* fd;
+  grpc_udp_listener* sp;
   gpr_mu* server_mu;
 };
 
@@ -141,26 +150,35 @@
   return s;
 }
 
-static void shutdown_fd(grpc_exec_ctx* exec_ctx, void* args,
-                        grpc_error* error) {
+static void shutdown_fd(void* args, grpc_error* error) {
   struct shutdown_fd_args* shutdown_args = (struct shutdown_fd_args*)args;
+  grpc_udp_listener* sp = shutdown_args->sp;
+  gpr_log(GPR_DEBUG, "shutdown fd %d", sp->fd);
   gpr_mu_lock(shutdown_args->server_mu);
-  grpc_fd_shutdown(exec_ctx, shutdown_args->fd, GRPC_ERROR_REF(error));
+  grpc_fd_shutdown(sp->emfd, GRPC_ERROR_REF(error));
+  sp->already_shutdown = true;
+  if (!sp->notify_on_write_armed) {
+    // Re-arm write notification to notify listener with error. This is
+    // necessary to decrement active_ports.
+    sp->notify_on_write_armed = true;
+    grpc_fd_notify_on_write(sp->emfd, &sp->write_closure);
+  }
   gpr_mu_unlock(shutdown_args->server_mu);
   gpr_free(shutdown_args);
 }
 
-static void dummy_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void dummy_cb(void* arg, grpc_error* error) {
   // No-op.
 }
 
-static void finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_udp_server* s) {
+static void finish_shutdown(grpc_udp_server* s) {
   if (s->shutdown_complete != nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(s->shutdown_complete, GRPC_ERROR_NONE);
   }
 
   gpr_mu_destroy(&s->mu);
 
+  gpr_log(GPR_DEBUG, "Destroy all listeners.");
   while (s->head) {
     grpc_udp_listener* sp = s->head;
     s->head = sp->next;
@@ -174,14 +192,13 @@
   gpr_free(s);
 }
 
-static void destroyed_port(grpc_exec_ctx* exec_ctx, void* server,
-                           grpc_error* error) {
+static void destroyed_port(void* server, grpc_error* error) {
   grpc_udp_server* s = (grpc_udp_server*)server;
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
   if (s->destroyed_ports == s->nports) {
     gpr_mu_unlock(&s->mu);
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   } else {
     gpr_mu_unlock(&s->mu);
   }
@@ -190,7 +207,7 @@
 /* called when all listening endpoints have been shutdown, so no further
    events will be received on them - at this point it's safe to destroy
    things */
-static void deactivated_all_ports(grpc_exec_ctx* exec_ctx, grpc_udp_server* s) {
+static void deactivated_all_ports(grpc_udp_server* s) {
   /* delete ALL the things */
   gpr_mu_lock(&s->mu);
 
@@ -207,24 +224,23 @@
         /* Call the orphan_cb to signal that the FD is about to be closed and
          * should no longer be used. Because at this point, all listening ports
          * have been shutdown already, no need to shutdown again.*/
-        GRPC_CLOSURE_INIT(&sp->orphan_fd_closure, dummy_cb, sp->emfd,
+        GRPC_CLOSURE_INIT(&sp->orphan_fd_closure, dummy_cb, sp,
                           grpc_schedule_on_exec_ctx);
         GPR_ASSERT(sp->orphan_cb);
-        sp->orphan_cb(exec_ctx, sp->emfd, &sp->orphan_fd_closure,
-                      sp->server->user_data);
+        gpr_log(GPR_DEBUG, "Orphan fd %d", sp->fd);
+        sp->orphan_cb(sp->emfd, &sp->orphan_fd_closure, sp->server->user_data);
       }
-      grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, nullptr,
+      grpc_fd_orphan(sp->emfd, &sp->destroyed_closure, nullptr,
                      false /* already_closed */, "udp_listener_shutdown");
     }
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    finish_shutdown(exec_ctx, s);
+    finish_shutdown(s);
   }
 }
 
-void grpc_udp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_udp_server* s,
-                             grpc_closure* on_done) {
+void grpc_udp_server_destroy(grpc_udp_server* s, grpc_closure* on_done) {
   grpc_udp_listener* sp;
   gpr_mu_lock(&s->mu);
 
@@ -233,24 +249,24 @@
 
   s->shutdown_complete = on_done;
 
+  gpr_log(GPR_DEBUG, "start to destroy udp_server");
   /* shutdown all fd's */
   if (s->active_ports) {
     for (sp = s->head; sp; sp = sp->next) {
       GPR_ASSERT(sp->orphan_cb);
       struct shutdown_fd_args* args =
           (struct shutdown_fd_args*)gpr_malloc(sizeof(*args));
-      args->fd = sp->emfd;
+      args->sp = sp;
       args->server_mu = &s->mu;
       GRPC_CLOSURE_INIT(&sp->orphan_fd_closure, shutdown_fd, args,
                         grpc_schedule_on_exec_ctx);
-      sp->orphan_cb(exec_ctx, sp->emfd, &sp->orphan_fd_closure,
-                    sp->server->user_data);
+      sp->orphan_cb(sp->emfd, &sp->orphan_fd_closure, sp->server->user_data);
       sp->orphan_notified = true;
     }
     gpr_mu_unlock(&s->mu);
   } else {
     gpr_mu_unlock(&s->mu);
-    deactivated_all_ports(exec_ctx, s);
+    deactivated_all_ports(s);
   }
 }
 
@@ -329,50 +345,106 @@
   return -1;
 }
 
+static void do_read(void* arg, grpc_error* error) {
+  grpc_udp_listener* sp = reinterpret_cast<grpc_udp_listener*>(arg);
+  GPR_ASSERT(sp->read_cb && error == GRPC_ERROR_NONE);
+  /* TODO: the reason we hold server->mu here is merely to prevent fd
+   * shutdown while we are reading. However, it blocks do_write(). Switch to
+   * read lock if available. */
+  gpr_mu_lock(&sp->server->mu);
+  /* Tell the registered callback that data is available to read. */
+  if (!sp->already_shutdown && sp->read_cb(sp->emfd, sp->server->user_data)) {
+    /* There maybe more packets to read. Schedule read_more_cb_ closure to run
+     * after finishing this event loop. */
+    GRPC_CLOSURE_SCHED(&sp->do_read_closure, GRPC_ERROR_NONE);
+  } else {
+    /* Finish reading all the packets, re-arm the notification event so we can
+     * get another chance to read. Or fd already shutdown, re-arm to get a
+     * notification with shutdown error. */
+    grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
+  }
+  gpr_mu_unlock(&sp->server->mu);
+}
+
 /* event manager callback when reads are ready */
-static void on_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_read(void* arg, grpc_error* error) {
   grpc_udp_listener* sp = (grpc_udp_listener*)arg;
 
   gpr_mu_lock(&sp->server->mu);
   if (error != GRPC_ERROR_NONE) {
     if (0 == --sp->server->active_ports && sp->server->shutdown) {
       gpr_mu_unlock(&sp->server->mu);
-      deactivated_all_ports(exec_ctx, sp->server);
+      deactivated_all_ports(sp->server);
     } else {
       gpr_mu_unlock(&sp->server->mu);
     }
     return;
   }
-
-  /* Tell the registered callback that data is available to read. */
+  /* Read once. If there is more data to read, off load the work to another
+   * thread to finish. */
   GPR_ASSERT(sp->read_cb);
-  sp->read_cb(exec_ctx, sp->emfd, sp->server->user_data);
-
-  /* Re-arm the notification event so we get another chance to read. */
-  grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+  if (sp->read_cb(sp->emfd, sp->server->user_data)) {
+    /* There maybe more packets to read. Schedule read_more_cb_ closure to run
+     * after finishing this event loop. */
+    GRPC_CLOSURE_INIT(&sp->do_read_closure, do_read, arg,
+                      grpc_executor_scheduler(GRPC_EXECUTOR_LONG));
+    GRPC_CLOSURE_SCHED(&sp->do_read_closure, GRPC_ERROR_NONE);
+  } else {
+    /* Finish reading all the packets, re-arm the notification event so we can
+     * get another chance to read. Or fd already shutdown, re-arm to get a
+     * notification with shutdown error. */
+    grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
+  }
   gpr_mu_unlock(&sp->server->mu);
 }
 
-static void on_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+// Wrapper of grpc_fd_notify_on_write() with a grpc_closure callback interface.
+void fd_notify_on_write_wrapper(void* arg, grpc_error* error) {
+  grpc_udp_listener* sp = reinterpret_cast<grpc_udp_listener*>(arg);
+  gpr_mu_lock(&sp->server->mu);
+  if (!sp->notify_on_write_armed) {
+    grpc_fd_notify_on_write(sp->emfd, &sp->write_closure);
+    sp->notify_on_write_armed = true;
+  }
+  gpr_mu_unlock(&sp->server->mu);
+}
+
+static void do_write(void* arg, grpc_error* error) {
+  grpc_udp_listener* sp = reinterpret_cast<grpc_udp_listener*>(arg);
+  gpr_mu_lock(&(sp->server->mu));
+  if (sp->already_shutdown) {
+    // If fd has been shutdown, don't write any more and re-arm notification.
+    grpc_fd_notify_on_write(sp->emfd, &sp->write_closure);
+  } else {
+    sp->notify_on_write_armed = false;
+    /* Tell the registered callback that the socket is writeable. */
+    GPR_ASSERT(sp->write_cb && error == GRPC_ERROR_NONE);
+    GRPC_CLOSURE_INIT(&sp->notify_on_write_closure, fd_notify_on_write_wrapper,
+                      arg, grpc_schedule_on_exec_ctx);
+    sp->write_cb(sp->emfd, sp->server->user_data, &sp->notify_on_write_closure);
+  }
+  gpr_mu_unlock(&sp->server->mu);
+}
+
+static void on_write(void* arg, grpc_error* error) {
   grpc_udp_listener* sp = (grpc_udp_listener*)arg;
 
   gpr_mu_lock(&(sp->server->mu));
   if (error != GRPC_ERROR_NONE) {
     if (0 == --sp->server->active_ports && sp->server->shutdown) {
       gpr_mu_unlock(&sp->server->mu);
-      deactivated_all_ports(exec_ctx, sp->server);
+      deactivated_all_ports(sp->server);
     } else {
       gpr_mu_unlock(&sp->server->mu);
     }
     return;
   }
 
-  /* Tell the registered callback that the socket is writeable. */
-  GPR_ASSERT(sp->write_cb);
-  sp->write_cb(exec_ctx, sp->emfd, sp->server->user_data);
+  /* Schedule actual write in another thread. */
+  GRPC_CLOSURE_INIT(&sp->do_write_closure, do_write, arg,
+                    grpc_executor_scheduler(GRPC_EXECUTOR_LONG));
 
-  /* Re-arm the notification event so we get another chance to write. */
-  grpc_fd_notify_on_write(exec_ctx, sp->emfd, &sp->write_closure);
+  GRPC_CLOSURE_SCHED(&sp->do_write_closure, GRPC_ERROR_NONE);
   gpr_mu_unlock(&sp->server->mu);
 }
 
@@ -409,6 +481,7 @@
     sp->write_cb = write_cb;
     sp->orphan_cb = orphan_cb;
     sp->orphan_notified = false;
+    sp->already_shutdown = false;
     GPR_ASSERT(sp->emfd);
     gpr_mu_unlock(&s->mu);
     gpr_free(name);
@@ -512,9 +585,8 @@
   return sp->fd;
 }
 
-void grpc_udp_server_start(grpc_exec_ctx* exec_ctx, grpc_udp_server* s,
-                           grpc_pollset** pollsets, size_t pollset_count,
-                           void* user_data) {
+void grpc_udp_server_start(grpc_udp_server* s, grpc_pollset** pollsets,
+                           size_t pollset_count, void* user_data) {
   size_t i;
   gpr_mu_lock(&s->mu);
   grpc_udp_listener* sp;
@@ -525,15 +597,16 @@
   sp = s->head;
   while (sp != nullptr) {
     for (i = 0; i < pollset_count; i++) {
-      grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+      grpc_pollset_add_fd(pollsets[i], sp->emfd);
     }
     GRPC_CLOSURE_INIT(&sp->read_closure, on_read, sp,
                       grpc_schedule_on_exec_ctx);
-    grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+    grpc_fd_notify_on_read(sp->emfd, &sp->read_closure);
 
     GRPC_CLOSURE_INIT(&sp->write_closure, on_write, sp,
                       grpc_schedule_on_exec_ctx);
-    grpc_fd_notify_on_write(exec_ctx, sp->emfd, &sp->write_closure);
+    sp->notify_on_write_armed = true;
+    grpc_fd_notify_on_write(sp->emfd, &sp->write_closure);
 
     /* Registered for both read and write callbacks: increment active_ports
      * twice to account for this, and delay free-ing of memory until both
diff --git a/src/core/lib/iomgr/udp_server.h b/src/core/lib/iomgr/udp_server.h
index 8cc08d3..02e3acb 100644
--- a/src/core/lib/iomgr/udp_server.h
+++ b/src/core/lib/iomgr/udp_server.h
@@ -30,17 +30,17 @@
 /* Forward decl of grpc_udp_server */
 typedef struct grpc_udp_server grpc_udp_server;
 
-/* Called when data is available to read from the socket. */
-typedef void (*grpc_udp_server_read_cb)(grpc_exec_ctx* exec_ctx, grpc_fd* emfd,
-                                        void* user_data);
+/* Called when data is available to read from the socket.
+ * Return true if there is more data to read from fd. */
+typedef bool (*grpc_udp_server_read_cb)(grpc_fd* emfd, void* user_data);
 
-/* Called when the socket is writeable. */
-typedef void (*grpc_udp_server_write_cb)(grpc_exec_ctx* exec_ctx, grpc_fd* emfd,
-                                         void* user_data);
+/* Called when the socket is writeable. The given closure should be scheduled
+ * when the socket becomes blocked next time. */
+typedef void (*grpc_udp_server_write_cb)(grpc_fd* emfd, void* user_data,
+                                         grpc_closure* notify_on_write_closure);
 
 /* Called when the grpc_fd is about to be orphaned (and the FD closed). */
-typedef void (*grpc_udp_server_orphan_cb)(grpc_exec_ctx* exec_ctx,
-                                          grpc_fd* emfd,
+typedef void (*grpc_udp_server_orphan_cb)(grpc_fd* emfd,
                                           grpc_closure* shutdown_fd_callback,
                                           void* user_data);
 
@@ -48,9 +48,8 @@
 grpc_udp_server* grpc_udp_server_create(const grpc_channel_args* args);
 
 /* Start listening to bound ports. user_data is passed to callbacks. */
-void grpc_udp_server_start(grpc_exec_ctx* exec_ctx, grpc_udp_server* udp_server,
-                           grpc_pollset** pollsets, size_t pollset_count,
-                           void* user_data);
+void grpc_udp_server_start(grpc_udp_server* udp_server, grpc_pollset** pollsets,
+                           size_t pollset_count, void* user_data);
 
 int grpc_udp_server_get_fd(grpc_udp_server* s, unsigned port_index);
 
@@ -70,7 +69,6 @@
                              grpc_udp_server_write_cb write_cb,
                              grpc_udp_server_orphan_cb orphan_cb);
 
-void grpc_udp_server_destroy(grpc_exec_ctx* exec_ctx, grpc_udp_server* server,
-                             grpc_closure* on_done);
+void grpc_udp_server_destroy(grpc_udp_server* server, grpc_closure* on_done);
 
 #endif /* GRPC_CORE_LIB_IOMGR_UDP_SERVER_H */
diff --git a/src/core/lib/profiling/basic_timers.cc b/src/core/lib/profiling/basic_timers.cc
index 3ec6280..87dd4ab 100644
--- a/src/core/lib/profiling/basic_timers.cc
+++ b/src/core/lib/profiling/basic_timers.cc
@@ -203,7 +203,8 @@
 static void init_output() {
   gpr_thd_options options = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&options);
-  GPR_ASSERT(gpr_thd_new(&g_writing_thread, writing_thread, NULL, &options));
+  GPR_ASSERT(gpr_thd_new(&g_writing_thread, "timer_output_thread",
+                         writing_thread, NULL, &options));
   atexit(finish_writing);
 }
 
diff --git a/src/core/lib/security/context/security_context.cc b/src/core/lib/security/context/security_context.cc
index 19c6148..0371027 100644
--- a/src/core/lib/security/context/security_context.cc
+++ b/src/core/lib/security/context/security_context.cc
@@ -36,7 +36,7 @@
 
 grpc_call_error grpc_call_set_credentials(grpc_call* call,
                                           grpc_call_credentials* creds) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_client_security_context* ctx = nullptr;
   GRPC_API_TRACE("grpc_call_set_credentials(call=%p, creds=%p)", 2,
                  (call, creds));
@@ -52,10 +52,10 @@
     grpc_call_context_set(call, GRPC_CONTEXT_SECURITY, ctx,
                           grpc_client_security_context_destroy);
   } else {
-    grpc_call_credentials_unref(&exec_ctx, ctx->creds);
+    grpc_call_credentials_unref(ctx->creds);
     ctx->creds = grpc_call_credentials_ref(creds);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return GRPC_CALL_OK;
 }
 
@@ -85,15 +85,14 @@
 }
 
 void grpc_client_security_context_destroy(void* ctx) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_client_security_context* c = (grpc_client_security_context*)ctx;
-  grpc_call_credentials_unref(&exec_ctx, c->creds);
+  grpc_call_credentials_unref(c->creds);
   GRPC_AUTH_CONTEXT_UNREF(c->auth_context, "client_security_context");
   if (c->extension.instance != nullptr && c->extension.destroy != nullptr) {
     c->extension.destroy(c->extension.instance);
   }
   gpr_free(ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /* --- grpc_server_security_context --- */
@@ -141,7 +140,7 @@
   }
 #else
 grpc_auth_context* grpc_auth_context_ref(grpc_auth_context* ctx) {
-  if (ctx == NULL) return NULL;
+  if (ctx == nullptr) return nullptr;
 #endif
   gpr_ref(&ctx->refcount);
   return ctx;
@@ -159,7 +158,7 @@
   }
 #else
 void grpc_auth_context_unref(grpc_auth_context* ctx) {
-  if (ctx == NULL) return;
+  if (ctx == nullptr) return;
 #endif
   if (gpr_unref(&ctx->refcount)) {
     size_t i;
@@ -303,7 +302,7 @@
   memset(property, 0, sizeof(grpc_auth_property));
 }
 
-static void auth_context_pointer_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
+static void auth_context_pointer_arg_destroy(void* p) {
   GRPC_AUTH_CONTEXT_UNREF((grpc_auth_context*)p, "auth_context_pointer_arg");
 }
 
diff --git a/src/core/lib/security/credentials/composite/composite_credentials.cc b/src/core/lib/security/credentials/composite/composite_credentials.cc
index 93dd721..e4c1604 100644
--- a/src/core/lib/security/credentials/composite/composite_credentials.cc
+++ b/src/core/lib/security/credentials/composite/composite_credentials.cc
@@ -39,17 +39,15 @@
   grpc_closure internal_on_request_metadata;
 } grpc_composite_call_credentials_metadata_context;
 
-static void composite_call_destruct(grpc_exec_ctx* exec_ctx,
-                                    grpc_call_credentials* creds) {
+static void composite_call_destruct(grpc_call_credentials* creds) {
   grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
   for (size_t i = 0; i < c->inner.num_creds; i++) {
-    grpc_call_credentials_unref(exec_ctx, c->inner.creds_array[i]);
+    grpc_call_credentials_unref(c->inner.creds_array[i]);
   }
   gpr_free(c->inner.creds_array);
 }
 
-static void composite_call_metadata_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                                       grpc_error* error) {
+static void composite_call_metadata_cb(void* arg, grpc_error* error) {
   grpc_composite_call_credentials_metadata_context* ctx =
       (grpc_composite_call_credentials_metadata_context*)arg;
   if (error == GRPC_ERROR_NONE) {
@@ -58,23 +56,23 @@
       grpc_call_credentials* inner_creds =
           ctx->composite_creds->inner.creds_array[ctx->creds_index++];
       if (grpc_call_credentials_get_request_metadata(
-              exec_ctx, inner_creds, ctx->pollent, ctx->auth_md_context,
-              ctx->md_array, &ctx->internal_on_request_metadata, &error)) {
+              inner_creds, ctx->pollent, ctx->auth_md_context, ctx->md_array,
+              &ctx->internal_on_request_metadata, &error)) {
         // Synchronous response, so call ourselves recursively.
-        composite_call_metadata_cb(exec_ctx, arg, error);
+        composite_call_metadata_cb(arg, error);
         GRPC_ERROR_UNREF(error);
       }
       return;
     }
     // We're done!
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, ctx->on_request_metadata, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(ctx->on_request_metadata, GRPC_ERROR_REF(error));
   gpr_free(ctx);
 }
 
 static bool composite_call_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context auth_md_context,
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context auth_md_context,
     grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
     grpc_error** error) {
   grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
@@ -93,8 +91,8 @@
     grpc_call_credentials* inner_creds =
         ctx->composite_creds->inner.creds_array[ctx->creds_index++];
     if (grpc_call_credentials_get_request_metadata(
-            exec_ctx, inner_creds, ctx->pollent, ctx->auth_md_context,
-            ctx->md_array, &ctx->internal_on_request_metadata, error)) {
+            inner_creds, ctx->pollent, ctx->auth_md_context, ctx->md_array,
+            &ctx->internal_on_request_metadata, error)) {
       if (*error != GRPC_ERROR_NONE) break;
     } else {
       synchronous = false;  // Async return.
@@ -106,12 +104,12 @@
 }
 
 static void composite_call_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
   for (size_t i = 0; i < c->inner.num_creds; ++i) {
     grpc_call_credentials_cancel_get_request_metadata(
-        exec_ctx, c->inner.creds_array[i], md_array, GRPC_ERROR_REF(error));
+        c->inner.creds_array[i], md_array, GRPC_ERROR_REF(error));
   }
   GRPC_ERROR_UNREF(error);
 }
@@ -200,19 +198,17 @@
 
 /* -- Composite channel credentials. -- */
 
-static void composite_channel_destruct(grpc_exec_ctx* exec_ctx,
-                                       grpc_channel_credentials* creds) {
+static void composite_channel_destruct(grpc_channel_credentials* creds) {
   grpc_composite_channel_credentials* c =
       (grpc_composite_channel_credentials*)creds;
-  grpc_channel_credentials_unref(exec_ctx, c->inner_creds);
-  grpc_call_credentials_unref(exec_ctx, c->call_creds);
+  grpc_channel_credentials_unref(c->inner_creds);
+  grpc_call_credentials_unref(c->call_creds);
 }
 
 static grpc_security_status composite_channel_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* creds,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* creds, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   grpc_composite_channel_credentials* c =
       (grpc_composite_channel_credentials*)creds;
   grpc_security_status status = GRPC_SECURITY_ERROR;
@@ -227,12 +223,11 @@
         grpc_composite_call_credentials_create(c->call_creds, call_creds,
                                                nullptr);
     status = c->inner_creds->vtable->create_security_connector(
-        exec_ctx, c->inner_creds, composite_call_creds, target, args, sc,
-        new_args);
-    grpc_call_credentials_unref(exec_ctx, composite_call_creds);
+        c->inner_creds, composite_call_creds, target, args, sc, new_args);
+    grpc_call_credentials_unref(composite_call_creds);
   } else {
     status = c->inner_creds->vtable->create_security_connector(
-        exec_ctx, c->inner_creds, c->call_creds, target, args, sc, new_args);
+        c->inner_creds, c->call_creds, target, args, sc, new_args);
   }
   return status;
 }
diff --git a/src/core/lib/security/credentials/credentials.cc b/src/core/lib/security/credentials/credentials.cc
index 90576e6..48b459e 100644
--- a/src/core/lib/security/credentials/credentials.cc
+++ b/src/core/lib/security/credentials/credentials.cc
@@ -47,8 +47,8 @@
 }
 
 void grpc_credentials_metadata_request_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_metadata_request* r) {
-  grpc_call_credentials_unref(exec_ctx, r->creds);
+    grpc_credentials_metadata_request* r) {
+  grpc_call_credentials_unref(r->creds);
   grpc_http_response_destroy(&r->response);
   gpr_free(r);
 }
@@ -60,12 +60,11 @@
   return creds;
 }
 
-void grpc_channel_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_credentials* creds) {
+void grpc_channel_credentials_unref(grpc_channel_credentials* creds) {
   if (creds == nullptr) return;
   if (gpr_unref(&creds->refcount)) {
     if (creds->vtable->destruct != nullptr) {
-      creds->vtable->destruct(exec_ctx, creds);
+      creds->vtable->destruct(creds);
     }
     gpr_free(creds);
   }
@@ -73,9 +72,8 @@
 
 void grpc_channel_credentials_release(grpc_channel_credentials* creds) {
   GRPC_API_TRACE("grpc_channel_credentials_release(creds=%p)", 1, (creds));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_channel_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_channel_credentials_unref(creds);
 }
 
 grpc_call_credentials* grpc_call_credentials_ref(grpc_call_credentials* creds) {
@@ -84,12 +82,11 @@
   return creds;
 }
 
-void grpc_call_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_credentials* creds) {
+void grpc_call_credentials_unref(grpc_call_credentials* creds) {
   if (creds == nullptr) return;
   if (gpr_unref(&creds->refcount)) {
     if (creds->vtable->destruct != nullptr) {
-      creds->vtable->destruct(exec_ctx, creds);
+      creds->vtable->destruct(creds);
     }
     gpr_free(creds);
   }
@@ -97,44 +94,42 @@
 
 void grpc_call_credentials_release(grpc_call_credentials* creds) {
   GRPC_API_TRACE("grpc_call_credentials_release(creds=%p)", 1, (creds));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_call_credentials_unref(creds);
 }
 
 bool grpc_call_credentials_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error) {
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error) {
   if (creds == nullptr || creds->vtable->get_request_metadata == nullptr) {
     return true;
   }
-  return creds->vtable->get_request_metadata(
-      exec_ctx, creds, pollent, context, md_array, on_request_metadata, error);
+  return creds->vtable->get_request_metadata(creds, pollent, context, md_array,
+                                             on_request_metadata, error);
 }
 
 void grpc_call_credentials_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   if (creds == nullptr ||
       creds->vtable->cancel_get_request_metadata == nullptr) {
     return;
   }
-  creds->vtable->cancel_get_request_metadata(exec_ctx, creds, md_array, error);
+  creds->vtable->cancel_get_request_metadata(creds, md_array, error);
 }
 
 grpc_security_status grpc_channel_credentials_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* channel_creds,
-    const char* target, const grpc_channel_args* args,
-    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
+    grpc_channel_credentials* channel_creds, const char* target,
+    const grpc_channel_args* args, grpc_channel_security_connector** sc,
+    grpc_channel_args** new_args) {
   *new_args = nullptr;
   if (channel_creds == nullptr) {
     return GRPC_SECURITY_ERROR;
   }
   GPR_ASSERT(channel_creds->vtable->create_security_connector != nullptr);
   return channel_creds->vtable->create_security_connector(
-      exec_ctx, channel_creds, nullptr, target, args, sc, new_args);
+      channel_creds, nullptr, target, args, sc, new_args);
 }
 
 grpc_channel_credentials*
@@ -149,8 +144,8 @@
   }
 }
 
-static void credentials_pointer_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
-  grpc_channel_credentials_unref(exec_ctx, (grpc_channel_credentials*)p);
+static void credentials_pointer_arg_destroy(void* p) {
+  grpc_channel_credentials_unref((grpc_channel_credentials*)p);
 }
 
 static void* credentials_pointer_arg_copy(void* p) {
@@ -200,12 +195,11 @@
   return creds;
 }
 
-void grpc_server_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_server_credentials* creds) {
+void grpc_server_credentials_unref(grpc_server_credentials* creds) {
   if (creds == nullptr) return;
   if (gpr_unref(&creds->refcount)) {
     if (creds->vtable->destruct != nullptr) {
-      creds->vtable->destruct(exec_ctx, creds);
+      creds->vtable->destruct(creds);
     }
     if (creds->processor.destroy != nullptr &&
         creds->processor.state != nullptr) {
@@ -217,19 +211,17 @@
 
 void grpc_server_credentials_release(grpc_server_credentials* creds) {
   GRPC_API_TRACE("grpc_server_credentials_release(creds=%p)", 1, (creds));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_server_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_server_credentials_unref(creds);
 }
 
 grpc_security_status grpc_server_credentials_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* creds,
-    grpc_server_security_connector** sc) {
+    grpc_server_credentials* creds, grpc_server_security_connector** sc) {
   if (creds == nullptr || creds->vtable->create_security_connector == nullptr) {
     gpr_log(GPR_ERROR, "Server credentials cannot create security context.");
     return GRPC_SECURITY_ERROR;
   }
-  return creds->vtable->create_security_connector(exec_ctx, creds, sc);
+  return creds->vtable->create_security_connector(creds, sc);
 }
 
 void grpc_server_credentials_set_auth_metadata_processor(
@@ -247,9 +239,8 @@
   creds->processor = processor;
 }
 
-static void server_credentials_pointer_arg_destroy(grpc_exec_ctx* exec_ctx,
-                                                   void* p) {
-  grpc_server_credentials_unref(exec_ctx, (grpc_server_credentials*)p);
+static void server_credentials_pointer_arg_destroy(void* p) {
+  grpc_server_credentials_unref((grpc_server_credentials*)p);
 }
 
 static void* server_credentials_pointer_arg_copy(void* p) {
diff --git a/src/core/lib/security/credentials/credentials.h b/src/core/lib/security/credentials/credentials.h
index bc1bd11..4825b65 100644
--- a/src/core/lib/security/credentials/credentials.h
+++ b/src/core/lib/security/credentials/credentials.h
@@ -88,13 +88,12 @@
 #define GRPC_ARG_CHANNEL_CREDENTIALS "grpc.channel_credentials"
 
 typedef struct {
-  void (*destruct)(grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c);
+  void (*destruct)(grpc_channel_credentials* c);
 
   grpc_security_status (*create_security_connector)(
-      grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c,
-      grpc_call_credentials* call_creds, const char* target,
-      const grpc_channel_args* args, grpc_channel_security_connector** sc,
-      grpc_channel_args** new_args);
+      grpc_channel_credentials* c, grpc_call_credentials* call_creds,
+      const char* target, const grpc_channel_args* args,
+      grpc_channel_security_connector** sc, grpc_channel_args** new_args);
 
   grpc_channel_credentials* (*duplicate_without_call_credentials)(
       grpc_channel_credentials* c);
@@ -108,17 +107,16 @@
 
 grpc_channel_credentials* grpc_channel_credentials_ref(
     grpc_channel_credentials* creds);
-void grpc_channel_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_credentials* creds);
+void grpc_channel_credentials_unref(grpc_channel_credentials* creds);
 
 /* Creates a security connector for the channel. May also create new channel
    args for the channel to be used in place of the passed in const args if
    returned non NULL. In that case the caller is responsible for destroying
    new_args after channel creation. */
 grpc_security_status grpc_channel_credentials_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* creds,
-    const char* target, const grpc_channel_args* args,
-    grpc_channel_security_connector** sc, grpc_channel_args** new_args);
+    grpc_channel_credentials* creds, const char* target,
+    const grpc_channel_args* args, grpc_channel_security_connector** sc,
+    grpc_channel_args** new_args);
 
 /* Creates a version of the channel credentials without any attached call
    credentials. This can be used in order to open a channel to a non-trusted
@@ -153,22 +151,19 @@
 void grpc_credentials_mdelem_array_append(grpc_credentials_mdelem_array* dst,
                                           grpc_credentials_mdelem_array* src);
 
-void grpc_credentials_mdelem_array_destroy(grpc_exec_ctx* exec_ctx,
-                                           grpc_credentials_mdelem_array* list);
+void grpc_credentials_mdelem_array_destroy(grpc_credentials_mdelem_array* list);
 
 /* --- grpc_call_credentials. --- */
 
 typedef struct {
-  void (*destruct)(grpc_exec_ctx* exec_ctx, grpc_call_credentials* c);
-  bool (*get_request_metadata)(grpc_exec_ctx* exec_ctx,
-                               grpc_call_credentials* c,
+  void (*destruct)(grpc_call_credentials* c);
+  bool (*get_request_metadata)(grpc_call_credentials* c,
                                grpc_polling_entity* pollent,
                                grpc_auth_metadata_context context,
                                grpc_credentials_mdelem_array* md_array,
                                grpc_closure* on_request_metadata,
                                grpc_error** error);
-  void (*cancel_get_request_metadata)(grpc_exec_ctx* exec_ctx,
-                                      grpc_call_credentials* c,
+  void (*cancel_get_request_metadata)(grpc_call_credentials* c,
                                       grpc_credentials_mdelem_array* md_array,
                                       grpc_error* error);
 } grpc_call_credentials_vtable;
@@ -180,39 +175,35 @@
 };
 
 grpc_call_credentials* grpc_call_credentials_ref(grpc_call_credentials* creds);
-void grpc_call_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_credentials* creds);
+void grpc_call_credentials_unref(grpc_call_credentials* creds);
 
 /// Returns true if completed synchronously, in which case \a error will
 /// be set to indicate the result.  Otherwise, \a on_request_metadata will
 /// be invoked asynchronously when complete.  \a md_array will be populated
 /// with the resulting metadata once complete.
 bool grpc_call_credentials_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error);
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error);
 
 /// Cancels a pending asynchronous operation started by
 /// grpc_call_credentials_get_request_metadata() with the corresponding
 /// value of \a md_array.
 void grpc_call_credentials_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error);
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error);
 
 /* Metadata-only credentials with the specified key and value where
    asynchronicity can be simulated for testing. */
 grpc_call_credentials* grpc_md_only_test_credentials_create(
-    grpc_exec_ctx* exec_ctx, const char* md_key, const char* md_value,
-    bool is_async);
+    const char* md_key, const char* md_value, bool is_async);
 
 /* --- grpc_server_credentials. --- */
 
 typedef struct {
-  void (*destruct)(grpc_exec_ctx* exec_ctx, grpc_server_credentials* c);
+  void (*destruct)(grpc_server_credentials* c);
   grpc_security_status (*create_security_connector)(
-      grpc_exec_ctx* exec_ctx, grpc_server_credentials* c,
-      grpc_server_security_connector** sc);
+      grpc_server_credentials* c, grpc_server_security_connector** sc);
 } grpc_server_credentials_vtable;
 
 struct grpc_server_credentials {
@@ -223,14 +214,12 @@
 };
 
 grpc_security_status grpc_server_credentials_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* creds,
-    grpc_server_security_connector** sc);
+    grpc_server_credentials* creds, grpc_server_security_connector** sc);
 
 grpc_server_credentials* grpc_server_credentials_ref(
     grpc_server_credentials* creds);
 
-void grpc_server_credentials_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_server_credentials* creds);
+void grpc_server_credentials_unref(grpc_server_credentials* creds);
 
 #define GRPC_SERVER_CREDENTIALS_ARG "grpc.server_credentials"
 
@@ -250,6 +239,6 @@
     grpc_call_credentials* creds);
 
 void grpc_credentials_metadata_request_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_metadata_request* r);
+    grpc_credentials_metadata_request* r);
 
 #endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_CREDENTIALS_H */
diff --git a/src/core/lib/security/credentials/credentials_metadata.cc b/src/core/lib/security/credentials/credentials_metadata.cc
index a3623fa..9ceaf21 100644
--- a/src/core/lib/security/credentials/credentials_metadata.cc
+++ b/src/core/lib/security/credentials/credentials_metadata.cc
@@ -52,9 +52,9 @@
 }
 
 void grpc_credentials_mdelem_array_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_mdelem_array* list) {
+    grpc_credentials_mdelem_array* list) {
   for (size_t i = 0; i < list->size; ++i) {
-    GRPC_MDELEM_UNREF(exec_ctx, list->md[i]);
+    GRPC_MDELEM_UNREF(list->md[i]);
   }
   gpr_free(list->md);
 }
diff --git a/src/core/lib/security/credentials/fake/fake_credentials.cc b/src/core/lib/security/credentials/fake/fake_credentials.cc
index a535a31..99b1214 100644
--- a/src/core/lib/security/credentials/fake/fake_credentials.cc
+++ b/src/core/lib/security/credentials/fake/fake_credentials.cc
@@ -34,10 +34,9 @@
   "grpc.fake_security.expected_targets"
 
 static grpc_security_status fake_transport_security_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* c, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   *sc =
       grpc_fake_channel_security_connector_create(c, call_creds, target, args);
   return GRPC_SECURITY_OK;
@@ -45,8 +44,7 @@
 
 static grpc_security_status
 fake_transport_security_server_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* c,
-    grpc_server_security_connector** sc) {
+    grpc_server_credentials* c, grpc_server_security_connector** sc) {
   *sc = grpc_fake_server_security_connector_create(c);
   return GRPC_SECURITY_OK;
 }
@@ -98,29 +96,27 @@
 
 /* -- Metadata-only test credentials. -- */
 
-static void md_only_test_destruct(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_credentials* creds) {
+static void md_only_test_destruct(grpc_call_credentials* creds) {
   grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)creds;
-  GRPC_MDELEM_UNREF(exec_ctx, c->md);
+  GRPC_MDELEM_UNREF(c->md);
 }
 
 static bool md_only_test_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error) {
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error) {
   grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)creds;
   grpc_credentials_mdelem_array_add(md_array, c->md);
   if (c->is_async) {
-    GRPC_CLOSURE_SCHED(exec_ctx, on_request_metadata, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(on_request_metadata, GRPC_ERROR_NONE);
     return false;
   }
   return true;
 }
 
 static void md_only_test_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -129,16 +125,14 @@
     md_only_test_cancel_get_request_metadata};
 
 grpc_call_credentials* grpc_md_only_test_credentials_create(
-    grpc_exec_ctx* exec_ctx, const char* md_key, const char* md_value,
-    bool is_async) {
+    const char* md_key, const char* md_value, bool is_async) {
   grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)gpr_zalloc(
       sizeof(grpc_md_only_test_credentials));
   c->base.type = GRPC_CALL_CREDENTIALS_TYPE_OAUTH2;
   c->base.vtable = &md_only_test_vtable;
   gpr_ref_init(&c->base.refcount, 1);
-  c->md =
-      grpc_mdelem_from_slices(exec_ctx, grpc_slice_from_copied_string(md_key),
-                              grpc_slice_from_copied_string(md_value));
+  c->md = grpc_mdelem_from_slices(grpc_slice_from_copied_string(md_key),
+                                  grpc_slice_from_copied_string(md_value));
   c->is_async = is_async;
   return &c->base;
 }
diff --git a/src/core/lib/security/credentials/google_default/google_default_credentials.cc b/src/core/lib/security/credentials/google_default/google_default_credentials.cc
index f586c7b..03d5285 100644
--- a/src/core/lib/security/credentials/google_default/google_default_credentials.cc
+++ b/src/core/lib/security/credentials/google_default/google_default_credentials.cc
@@ -58,8 +58,7 @@
   grpc_http_response response;
 } compute_engine_detector;
 
-static void on_compute_engine_detection_http_response(grpc_exec_ctx* exec_ctx,
-                                                      void* user_data,
+static void on_compute_engine_detection_http_response(void* user_data,
                                                       grpc_error* error) {
   compute_engine_detector* detector = (compute_engine_detector*)user_data;
   if (error == GRPC_ERROR_NONE && detector->response.status == 200 &&
@@ -80,16 +79,16 @@
   detector->is_done = 1;
   GRPC_LOG_IF_ERROR(
       "Pollset kick",
-      grpc_pollset_kick(
-          exec_ctx, grpc_polling_entity_pollset(&detector->pollent), nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&detector->pollent),
+                        nullptr));
   gpr_mu_unlock(g_polling_mu);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p, grpc_error* e) {
-  grpc_pollset_destroy(exec_ctx, (grpc_pollset*)p);
+static void destroy_pollset(void* p, grpc_error* e) {
+  grpc_pollset_destroy((grpc_pollset*)p);
 }
 
-static int is_stack_running_on_compute_engine(grpc_exec_ctx* exec_ctx) {
+static int is_stack_running_on_compute_engine() {
   compute_engine_detector detector;
   grpc_httpcli_request request;
   grpc_httpcli_context context;
@@ -115,14 +114,14 @@
   grpc_resource_quota* resource_quota =
       grpc_resource_quota_create("google_default_credentials");
   grpc_httpcli_get(
-      exec_ctx, &context, &detector.pollent, resource_quota, &request,
-      grpc_exec_ctx_now(exec_ctx) + max_detection_delay,
+      &context, &detector.pollent, resource_quota, &request,
+      grpc_core::ExecCtx::Get()->Now() + max_detection_delay,
       GRPC_CLOSURE_CREATE(on_compute_engine_detection_http_response, &detector,
                           grpc_schedule_on_exec_ctx),
       &detector.response);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Block until we get the response. This is not ideal but this should only be
      called once for the lifetime of the process by the default credentials. */
@@ -131,8 +130,7 @@
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(exec_ctx,
-                              grpc_polling_entity_pollset(&detector.pollent),
+            grpc_pollset_work(grpc_polling_entity_pollset(&detector.pollent),
                               &worker, GRPC_MILLIS_INF_FUTURE))) {
       detector.is_done = 1;
       detector.success = 0;
@@ -140,15 +138,14 @@
   }
   gpr_mu_unlock(g_polling_mu);
 
-  grpc_httpcli_context_destroy(exec_ctx, &context);
+  grpc_httpcli_context_destroy(&context);
   GRPC_CLOSURE_INIT(&destroy_closure, destroy_pollset,
                     grpc_polling_entity_pollset(&detector.pollent),
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(exec_ctx,
-                        grpc_polling_entity_pollset(&detector.pollent),
+  grpc_pollset_shutdown(grpc_polling_entity_pollset(&detector.pollent),
                         &destroy_closure);
   g_polling_mu = nullptr;
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   gpr_free(grpc_polling_entity_pollset(&detector.pollent));
   grpc_http_response_destroy(&detector.response);
@@ -158,7 +155,7 @@
 
 /* Takes ownership of creds_path if not NULL. */
 static grpc_error* create_default_creds_from_path(
-    grpc_exec_ctx* exec_ctx, char* creds_path, grpc_call_credentials** creds) {
+    char* creds_path, grpc_call_credentials** creds) {
   grpc_json* json = nullptr;
   grpc_auth_json_key key;
   grpc_auth_refresh_token token;
@@ -187,7 +184,7 @@
   if (grpc_auth_json_key_is_valid(&key)) {
     result =
         grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
-            exec_ctx, key, grpc_max_auth_token_lifetime());
+            key, grpc_max_auth_token_lifetime());
     if (result == nullptr) {
       error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "grpc_service_account_jwt_access_credentials_create_from_auth_json_"
@@ -212,7 +209,7 @@
 end:
   GPR_ASSERT((result == nullptr) + (error == GRPC_ERROR_NONE) == 1);
   if (creds_path != nullptr) gpr_free(creds_path);
-  grpc_slice_unref_internal(exec_ctx, creds_data);
+  grpc_slice_unref_internal(creds_data);
   if (json != nullptr) grpc_json_destroy(json);
   *creds = result;
   return error;
@@ -224,7 +221,7 @@
   grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
       "Failed to create Google credentials");
   grpc_error* err;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_google_default_credentials_create(void)", 0, ());
 
@@ -239,22 +236,20 @@
 
   /* First, try the environment variable. */
   err = create_default_creds_from_path(
-      &exec_ctx, gpr_getenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR), &call_creds);
+      gpr_getenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR), &call_creds);
   if (err == GRPC_ERROR_NONE) goto end;
   error = grpc_error_add_child(error, err);
 
   /* Then the well-known file. */
   err = create_default_creds_from_path(
-      &exec_ctx, grpc_get_well_known_google_credentials_file_path(),
-      &call_creds);
+      grpc_get_well_known_google_credentials_file_path(), &call_creds);
   if (err == GRPC_ERROR_NONE) goto end;
   error = grpc_error_add_child(error, err);
 
   /* At last try to see if we're on compute engine (do the detection only once
      since it requires a network test). */
   if (!compute_engine_detection_done) {
-    int need_compute_engine_creds =
-        is_stack_running_on_compute_engine(&exec_ctx);
+    int need_compute_engine_creds = is_stack_running_on_compute_engine();
     compute_engine_detection_done = 1;
     if (need_compute_engine_creds) {
       call_creds = grpc_google_compute_engine_credentials_create(nullptr);
@@ -278,8 +273,8 @@
           grpc_composite_channel_credentials_create(ssl_creds, call_creds,
                                                     nullptr));
       GPR_ASSERT(default_credentials != nullptr);
-      grpc_channel_credentials_unref(&exec_ctx, ssl_creds);
-      grpc_call_credentials_unref(&exec_ctx, call_creds);
+      grpc_channel_credentials_unref(ssl_creds);
+      grpc_call_credentials_unref(call_creds);
       result = default_credentials;
     } else {
       gpr_log(GPR_ERROR, "Could not create google default credentials.");
@@ -291,21 +286,20 @@
   } else {
     GRPC_ERROR_UNREF(error);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return result;
 }
 
 void grpc_flush_cached_google_default_credentials(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_once_init(&g_once, init_default_credentials);
   gpr_mu_lock(&g_state_mu);
   if (default_credentials != nullptr) {
-    grpc_channel_credentials_unref(&exec_ctx, default_credentials);
+    grpc_channel_credentials_unref(default_credentials);
     default_credentials = nullptr;
   }
   compute_engine_detection_done = 0;
   gpr_mu_unlock(&g_state_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /* -- Well known credentials path. -- */
diff --git a/src/core/lib/security/credentials/iam/iam_credentials.cc b/src/core/lib/security/credentials/iam/iam_credentials.cc
index 1741bf3..75acb2a 100644
--- a/src/core/lib/security/credentials/iam/iam_credentials.cc
+++ b/src/core/lib/security/credentials/iam/iam_credentials.cc
@@ -27,14 +27,12 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 
-static void iam_destruct(grpc_exec_ctx* exec_ctx,
-                         grpc_call_credentials* creds) {
+static void iam_destruct(grpc_call_credentials* creds) {
   grpc_google_iam_credentials* c = (grpc_google_iam_credentials*)creds;
-  grpc_credentials_mdelem_array_destroy(exec_ctx, &c->md_array);
+  grpc_credentials_mdelem_array_destroy(&c->md_array);
 }
 
-static bool iam_get_request_metadata(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_credentials* creds,
+static bool iam_get_request_metadata(grpc_call_credentials* creds,
                                      grpc_polling_entity* pollent,
                                      grpc_auth_metadata_context context,
                                      grpc_credentials_mdelem_array* md_array,
@@ -46,8 +44,8 @@
 }
 
 static void iam_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -56,7 +54,7 @@
 
 grpc_call_credentials* grpc_google_iam_credentials_create(
     const char* token, const char* authority_selector, void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE(
       "grpc_iam_credentials_create(token=%s, authority_selector=%s, "
       "reserved=%p)",
@@ -70,17 +68,15 @@
   c->base.vtable = &iam_vtable;
   gpr_ref_init(&c->base.refcount, 1);
   grpc_mdelem md = grpc_mdelem_from_slices(
-      &exec_ctx,
       grpc_slice_from_static_string(GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY),
       grpc_slice_from_copied_string(token));
   grpc_credentials_mdelem_array_add(&c->md_array, md);
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
+  GRPC_MDELEM_UNREF(md);
   md = grpc_mdelem_from_slices(
-      &exec_ctx,
       grpc_slice_from_static_string(GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY),
       grpc_slice_from_copied_string(authority_selector));
   grpc_credentials_mdelem_array_add(&c->md_array, md);
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+
   return &c->base;
 }
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.cc b/src/core/lib/security/credentials/jwt/jwt_credentials.cc
index 77163c0..2404e86 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.cc
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.cc
@@ -30,9 +30,8 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 
-static void jwt_reset_cache(grpc_exec_ctx* exec_ctx,
-                            grpc_service_account_jwt_access_credentials* c) {
-  GRPC_MDELEM_UNREF(exec_ctx, c->cached.jwt_md);
+static void jwt_reset_cache(grpc_service_account_jwt_access_credentials* c) {
+  GRPC_MDELEM_UNREF(c->cached.jwt_md);
   c->cached.jwt_md = GRPC_MDNULL;
   if (c->cached.service_url != nullptr) {
     gpr_free(c->cached.service_url);
@@ -41,17 +40,15 @@
   c->cached.jwt_expiration = gpr_inf_past(GPR_CLOCK_REALTIME);
 }
 
-static void jwt_destruct(grpc_exec_ctx* exec_ctx,
-                         grpc_call_credentials* creds) {
+static void jwt_destruct(grpc_call_credentials* creds) {
   grpc_service_account_jwt_access_credentials* c =
       (grpc_service_account_jwt_access_credentials*)creds;
   grpc_auth_json_key_destruct(&c->key);
-  jwt_reset_cache(exec_ctx, c);
+  jwt_reset_cache(c);
   gpr_mu_destroy(&c->cache_mu);
 }
 
-static bool jwt_get_request_metadata(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_credentials* creds,
+static bool jwt_get_request_metadata(grpc_call_credentials* creds,
                                      grpc_polling_entity* pollent,
                                      grpc_auth_metadata_context context,
                                      grpc_credentials_mdelem_array* md_array,
@@ -81,7 +78,7 @@
     char* jwt = nullptr;
     /* Generate a new jwt. */
     gpr_mu_lock(&c->cache_mu);
-    jwt_reset_cache(exec_ctx, c);
+    jwt_reset_cache(c);
     jwt = grpc_jwt_encode_and_sign(&c->key, context.service_url,
                                    c->jwt_lifetime, nullptr);
     if (jwt != nullptr) {
@@ -92,7 +89,6 @@
           gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), c->jwt_lifetime);
       c->cached.service_url = gpr_strdup(context.service_url);
       c->cached.jwt_md = grpc_mdelem_from_slices(
-          exec_ctx,
           grpc_slice_from_static_string(GRPC_AUTHORIZATION_METADATA_KEY),
           grpc_slice_from_copied_string(md_value));
       gpr_free(md_value);
@@ -103,7 +99,7 @@
 
   if (!GRPC_MDISNULL(jwt_md)) {
     grpc_credentials_mdelem_array_add(md_array, jwt_md);
-    GRPC_MDELEM_UNREF(exec_ctx, jwt_md);
+    GRPC_MDELEM_UNREF(jwt_md);
   } else {
     *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Could not generate JWT.");
   }
@@ -111,8 +107,8 @@
 }
 
 static void jwt_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -121,8 +117,7 @@
 
 grpc_call_credentials*
 grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
-    grpc_exec_ctx* exec_ctx, grpc_auth_json_key key,
-    gpr_timespec token_lifetime) {
+    grpc_auth_json_key key, gpr_timespec token_lifetime) {
   grpc_service_account_jwt_access_credentials* c;
   if (!grpc_auth_json_key_is_valid(&key)) {
     gpr_log(GPR_ERROR, "Invalid input for jwt credentials creation");
@@ -143,7 +138,7 @@
   }
   c->jwt_lifetime = token_lifetime;
   gpr_mu_init(&c->cache_mu);
-  jwt_reset_cache(exec_ctx, c);
+  jwt_reset_cache(c);
   return &c->base;
 }
 
@@ -186,11 +181,10 @@
     gpr_free(clean_json);
   }
   GPR_ASSERT(reserved == nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_call_credentials* creds =
       grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
-          &exec_ctx, grpc_auth_json_key_create_from_string(json_key),
-          token_lifetime);
-  grpc_exec_ctx_finish(&exec_ctx);
+          grpc_auth_json_key_create_from_string(json_key), token_lifetime);
+
   return creds;
 }
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.h b/src/core/lib/security/credentials/jwt/jwt_credentials.h
index 85f068a..f58a8b6 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.h
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.h
@@ -42,7 +42,6 @@
 // Takes ownership of the key.
 grpc_call_credentials*
 grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
-    grpc_exec_ctx* exec_ctx, grpc_auth_json_key key,
-    gpr_timespec token_lifetime);
+    grpc_auth_json_key key, gpr_timespec token_lifetime);
 
 #endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_JWT_JWT_CREDENTIALS_H */
diff --git a/src/core/lib/security/credentials/jwt/jwt_verifier.cc b/src/core/lib/security/credentials/jwt/jwt_verifier.cc
index 3709b83..39339f0 100644
--- a/src/core/lib/security/credentials/jwt/jwt_verifier.cc
+++ b/src/core/lib/security/credentials/jwt/jwt_verifier.cc
@@ -74,12 +74,11 @@
   }
 }
 
-static grpc_json* parse_json_part_from_jwt(grpc_exec_ctx* exec_ctx,
-                                           const char* str, size_t len,
+static grpc_json* parse_json_part_from_jwt(const char* str, size_t len,
                                            grpc_slice* buffer) {
   grpc_json* json;
 
-  *buffer = grpc_base64_decode_with_len(exec_ctx, str, len, 1);
+  *buffer = grpc_base64_decode_with_len(str, len, 1);
   if (GRPC_SLICE_IS_EMPTY(*buffer)) {
     gpr_log(GPR_ERROR, "Invalid base64.");
     return nullptr;
@@ -87,7 +86,7 @@
   json = grpc_json_parse_string_with_len((char*)GRPC_SLICE_START_PTR(*buffer),
                                          GRPC_SLICE_LENGTH(*buffer));
   if (json == nullptr) {
-    grpc_slice_unref_internal(exec_ctx, *buffer);
+    grpc_slice_unref_internal(*buffer);
     gpr_log(GPR_ERROR, "JSON parsing error.");
   }
   return json;
@@ -123,14 +122,13 @@
   grpc_slice buffer;
 } jose_header;
 
-static void jose_header_destroy(grpc_exec_ctx* exec_ctx, jose_header* h) {
-  grpc_slice_unref_internal(exec_ctx, h->buffer);
+static void jose_header_destroy(jose_header* h) {
+  grpc_slice_unref_internal(h->buffer);
   gpr_free(h);
 }
 
 /* Takes ownership of json and buffer. */
-static jose_header* jose_header_from_json(grpc_exec_ctx* exec_ctx,
-                                          grpc_json* json, grpc_slice buffer) {
+static jose_header* jose_header_from_json(grpc_json* json, grpc_slice buffer) {
   grpc_json* cur;
   jose_header* h = (jose_header*)gpr_zalloc(sizeof(jose_header));
   h->buffer = buffer;
@@ -164,7 +162,7 @@
 
 error:
   grpc_json_destroy(json);
-  jose_header_destroy(exec_ctx, h);
+  jose_header_destroy(h);
   return nullptr;
 }
 
@@ -184,9 +182,9 @@
   grpc_slice buffer;
 };
 
-void grpc_jwt_claims_destroy(grpc_exec_ctx* exec_ctx, grpc_jwt_claims* claims) {
+void grpc_jwt_claims_destroy(grpc_jwt_claims* claims) {
   grpc_json_destroy(claims->json);
-  grpc_slice_unref_internal(exec_ctx, claims->buffer);
+  grpc_slice_unref_internal(claims->buffer);
   gpr_free(claims);
 }
 
@@ -231,8 +229,7 @@
 }
 
 /* Takes ownership of json and buffer even in case of failure. */
-grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_exec_ctx* exec_ctx,
-                                           grpc_json* json, grpc_slice buffer) {
+grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_json* json, grpc_slice buffer) {
   grpc_json* cur;
   grpc_jwt_claims* claims =
       (grpc_jwt_claims*)gpr_malloc(sizeof(grpc_jwt_claims));
@@ -274,7 +271,7 @@
   return claims;
 
 error:
-  grpc_jwt_claims_destroy(exec_ctx, claims);
+  grpc_jwt_claims_destroy(claims);
   return nullptr;
 }
 
@@ -350,7 +347,7 @@
     grpc_jwt_claims* claims, const char* audience, grpc_slice signature,
     const char* signed_jwt, size_t signed_jwt_len, void* user_data,
     grpc_jwt_verification_done_cb cb) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   verifier_cb_ctx* ctx = (verifier_cb_ctx*)gpr_zalloc(sizeof(verifier_cb_ctx));
   ctx->verifier = verifier;
   ctx->pollent = grpc_polling_entity_create_from_pollset(pollset);
@@ -361,16 +358,16 @@
   ctx->signed_data = grpc_slice_from_copied_buffer(signed_jwt, signed_jwt_len);
   ctx->user_data = user_data;
   ctx->user_cb = cb;
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return ctx;
 }
 
-void verifier_cb_ctx_destroy(grpc_exec_ctx* exec_ctx, verifier_cb_ctx* ctx) {
+void verifier_cb_ctx_destroy(verifier_cb_ctx* ctx) {
   if (ctx->audience != nullptr) gpr_free(ctx->audience);
-  if (ctx->claims != nullptr) grpc_jwt_claims_destroy(exec_ctx, ctx->claims);
-  grpc_slice_unref_internal(exec_ctx, ctx->signature);
-  grpc_slice_unref_internal(exec_ctx, ctx->signed_data);
-  jose_header_destroy(exec_ctx, ctx->header);
+  if (ctx->claims != nullptr) grpc_jwt_claims_destroy(ctx->claims);
+  grpc_slice_unref_internal(ctx->signature);
+  grpc_slice_unref_internal(ctx->signed_data);
+  jose_header_destroy(ctx->header);
   for (size_t i = 0; i < HTTP_RESPONSE_COUNT; i++) {
     grpc_http_response_destroy(&ctx->responses[i]);
   }
@@ -450,19 +447,19 @@
   return result;
 }
 
-static BIGNUM* bignum_from_base64(grpc_exec_ctx* exec_ctx, const char* b64) {
+static BIGNUM* bignum_from_base64(const char* b64) {
   BIGNUM* result = nullptr;
   grpc_slice bin;
 
   if (b64 == nullptr) return nullptr;
-  bin = grpc_base64_decode(exec_ctx, b64, 1);
+  bin = grpc_base64_decode(b64, 1);
   if (GRPC_SLICE_IS_EMPTY(bin)) {
     gpr_log(GPR_ERROR, "Invalid base64 for big num.");
     return nullptr;
   }
   result = BN_bin2bn(GRPC_SLICE_START_PTR(bin),
                      TSI_SIZE_AS_SIZE(GRPC_SLICE_LENGTH(bin)), nullptr);
-  grpc_slice_unref_internal(exec_ctx, bin);
+  grpc_slice_unref_internal(bin);
   return result;
 }
 
@@ -495,8 +492,7 @@
 }
 #endif  // OPENSSL_VERSION_NUMBER < 0x10100000L
 
-static EVP_PKEY* pkey_from_jwk(grpc_exec_ctx* exec_ctx, const grpc_json* json,
-                               const char* kty) {
+static EVP_PKEY* pkey_from_jwk(const grpc_json* json, const char* kty) {
   const grpc_json* key_prop;
   RSA* rsa = nullptr;
   EVP_PKEY* result = nullptr;
@@ -515,12 +511,10 @@
   }
   for (key_prop = json->child; key_prop != nullptr; key_prop = key_prop->next) {
     if (strcmp(key_prop->key, "n") == 0) {
-      tmp_n =
-          bignum_from_base64(exec_ctx, validate_string_field(key_prop, "n"));
+      tmp_n = bignum_from_base64(validate_string_field(key_prop, "n"));
       if (tmp_n == nullptr) goto end;
     } else if (strcmp(key_prop->key, "e") == 0) {
-      tmp_e =
-          bignum_from_base64(exec_ctx, validate_string_field(key_prop, "e"));
+      tmp_e = bignum_from_base64(validate_string_field(key_prop, "e"));
       if (tmp_e == nullptr) goto end;
     }
   }
@@ -545,8 +539,7 @@
   return result;
 }
 
-static EVP_PKEY* find_verification_key(grpc_exec_ctx* exec_ctx,
-                                       const grpc_json* json,
+static EVP_PKEY* find_verification_key(const grpc_json* json,
                                        const char* header_alg,
                                        const char* header_kid) {
   const grpc_json* jkey;
@@ -591,7 +584,7 @@
     }
     if (alg != nullptr && kid != nullptr && kty != nullptr &&
         strcmp(kid, header_kid) == 0 && strcmp(alg, header_alg) == 0) {
-      return pkey_from_jwk(exec_ctx, jkey, kty);
+      return pkey_from_jwk(jkey, kty);
     }
   }
   gpr_log(GPR_ERROR,
@@ -632,8 +625,7 @@
   return result;
 }
 
-static void on_keys_retrieved(grpc_exec_ctx* exec_ctx, void* user_data,
-                              grpc_error* error) {
+static void on_keys_retrieved(void* user_data, grpc_error* error) {
   verifier_cb_ctx* ctx = (verifier_cb_ctx*)user_data;
   grpc_json* json = json_from_http(&ctx->responses[HTTP_RESPONSE_KEYS]);
   EVP_PKEY* verification_key = nullptr;
@@ -645,7 +637,7 @@
     goto end;
   }
   verification_key =
-      find_verification_key(exec_ctx, json, ctx->header->alg, ctx->header->kid);
+      find_verification_key(json, ctx->header->alg, ctx->header->kid);
   if (verification_key == nullptr) {
     gpr_log(GPR_ERROR, "Could not find verification key with kid %s.",
             ctx->header->kid);
@@ -669,12 +661,11 @@
 end:
   if (json != nullptr) grpc_json_destroy(json);
   EVP_PKEY_free(verification_key);
-  ctx->user_cb(exec_ctx, ctx->user_data, status, claims);
-  verifier_cb_ctx_destroy(exec_ctx, ctx);
+  ctx->user_cb(ctx->user_data, status, claims);
+  verifier_cb_ctx_destroy(ctx);
 }
 
-static void on_openid_config_retrieved(grpc_exec_ctx* exec_ctx, void* user_data,
-                                       grpc_error* error) {
+static void on_openid_config_retrieved(void* user_data, grpc_error* error) {
   const grpc_json* cur;
   verifier_cb_ctx* ctx = (verifier_cb_ctx*)user_data;
   const grpc_http_response* response = &ctx->responses[HTTP_RESPONSE_OPENID];
@@ -711,20 +702,19 @@
      extreme memory pressure. */
   resource_quota = grpc_resource_quota_create("jwt_verifier");
   grpc_httpcli_get(
-      exec_ctx, &ctx->verifier->http_ctx, &ctx->pollent, resource_quota, &req,
-      grpc_exec_ctx_now(exec_ctx) + grpc_jwt_verifier_max_delay,
+      &ctx->verifier->http_ctx, &ctx->pollent, resource_quota, &req,
+      grpc_core::ExecCtx::Get()->Now() + grpc_jwt_verifier_max_delay,
       GRPC_CLOSURE_CREATE(on_keys_retrieved, ctx, grpc_schedule_on_exec_ctx),
       &ctx->responses[HTTP_RESPONSE_KEYS]);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   grpc_json_destroy(json);
   gpr_free(req.host);
   return;
 
 error:
   if (json != nullptr) grpc_json_destroy(json);
-  ctx->user_cb(exec_ctx, ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR,
-               nullptr);
-  verifier_cb_ctx_destroy(exec_ctx, ctx);
+  ctx->user_cb(ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR, nullptr);
+  verifier_cb_ctx_destroy(ctx);
 }
 
 static email_key_mapping* verifier_get_mapping(grpc_jwt_verifier* v,
@@ -772,8 +762,7 @@
 }
 
 /* Takes ownership of ctx. */
-static void retrieve_key_and_verify(grpc_exec_ctx* exec_ctx,
-                                    verifier_cb_ctx* ctx) {
+static void retrieve_key_and_verify(verifier_cb_ctx* ctx) {
   const char* email_domain;
   grpc_closure* http_cb;
   char* path_prefix = nullptr;
@@ -840,23 +829,21 @@
      channel. This would allow us to cancel an authentication query when under
      extreme memory pressure. */
   resource_quota = grpc_resource_quota_create("jwt_verifier");
-  grpc_httpcli_get(exec_ctx, &ctx->verifier->http_ctx, &ctx->pollent,
-                   resource_quota, &req,
-                   grpc_exec_ctx_now(exec_ctx) + grpc_jwt_verifier_max_delay,
-                   http_cb, &ctx->responses[rsp_idx]);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_httpcli_get(
+      &ctx->verifier->http_ctx, &ctx->pollent, resource_quota, &req,
+      grpc_core::ExecCtx::Get()->Now() + grpc_jwt_verifier_max_delay, http_cb,
+      &ctx->responses[rsp_idx]);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_free(req.host);
   gpr_free(req.http.path);
   return;
 
 error:
-  ctx->user_cb(exec_ctx, ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR,
-               nullptr);
-  verifier_cb_ctx_destroy(exec_ctx, ctx);
+  ctx->user_cb(ctx->user_data, GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR, nullptr);
+  verifier_cb_ctx_destroy(ctx);
 }
 
-void grpc_jwt_verifier_verify(grpc_exec_ctx* exec_ctx,
-                              grpc_jwt_verifier* verifier,
+void grpc_jwt_verifier_verify(grpc_jwt_verifier* verifier,
                               grpc_pollset* pollset, const char* jwt,
                               const char* audience,
                               grpc_jwt_verification_done_cb cb,
@@ -875,35 +862,32 @@
              cb != nullptr);
   dot = strchr(cur, '.');
   if (dot == nullptr) goto error;
-  json = parse_json_part_from_jwt(exec_ctx, cur, (size_t)(dot - cur),
-                                  &header_buffer);
+  json = parse_json_part_from_jwt(cur, (size_t)(dot - cur), &header_buffer);
   if (json == nullptr) goto error;
-  header = jose_header_from_json(exec_ctx, json, header_buffer);
+  header = jose_header_from_json(json, header_buffer);
   if (header == nullptr) goto error;
 
   cur = dot + 1;
   dot = strchr(cur, '.');
   if (dot == nullptr) goto error;
-  json = parse_json_part_from_jwt(exec_ctx, cur, (size_t)(dot - cur),
-                                  &claims_buffer);
+  json = parse_json_part_from_jwt(cur, (size_t)(dot - cur), &claims_buffer);
   if (json == nullptr) goto error;
-  claims = grpc_jwt_claims_from_json(exec_ctx, json, claims_buffer);
+  claims = grpc_jwt_claims_from_json(json, claims_buffer);
   if (claims == nullptr) goto error;
 
   signed_jwt_len = (size_t)(dot - jwt);
   cur = dot + 1;
-  signature = grpc_base64_decode(exec_ctx, cur, 1);
+  signature = grpc_base64_decode(cur, 1);
   if (GRPC_SLICE_IS_EMPTY(signature)) goto error;
   retrieve_key_and_verify(
-      exec_ctx,
       verifier_cb_ctx_create(verifier, pollset, header, claims, audience,
                              signature, jwt, signed_jwt_len, user_data, cb));
   return;
 
 error:
-  if (header != nullptr) jose_header_destroy(exec_ctx, header);
-  if (claims != nullptr) grpc_jwt_claims_destroy(exec_ctx, claims);
-  cb(exec_ctx, user_data, GRPC_JWT_VERIFIER_BAD_FORMAT, nullptr);
+  if (header != nullptr) jose_header_destroy(header);
+  if (claims != nullptr) grpc_jwt_claims_destroy(claims);
+  cb(user_data, GRPC_JWT_VERIFIER_BAD_FORMAT, nullptr);
 }
 
 grpc_jwt_verifier* grpc_jwt_verifier_create(
@@ -930,10 +914,10 @@
   return v;
 }
 
-void grpc_jwt_verifier_destroy(grpc_exec_ctx* exec_ctx, grpc_jwt_verifier* v) {
+void grpc_jwt_verifier_destroy(grpc_jwt_verifier* v) {
   size_t i;
   if (v == nullptr) return;
-  grpc_httpcli_context_destroy(exec_ctx, &v->http_ctx);
+  grpc_httpcli_context_destroy(&v->http_ctx);
   if (v->mappings != nullptr) {
     for (i = 0; i < v->num_mappings; i++) {
       gpr_free(v->mappings[i].email_domain);
diff --git a/src/core/lib/security/credentials/jwt/jwt_verifier.h b/src/core/lib/security/credentials/jwt/jwt_verifier.h
index 2aacd49..b3805e7 100644
--- a/src/core/lib/security/credentials/jwt/jwt_verifier.h
+++ b/src/core/lib/security/credentials/jwt/jwt_verifier.h
@@ -51,7 +51,7 @@
 
 typedef struct grpc_jwt_claims grpc_jwt_claims;
 
-void grpc_jwt_claims_destroy(grpc_exec_ctx* exec_ctx, grpc_jwt_claims* claims);
+void grpc_jwt_claims_destroy(grpc_jwt_claims* claims);
 
 /* Returns the whole JSON tree of the claims. */
 const grpc_json* grpc_jwt_claims_json(const grpc_jwt_claims* claims);
@@ -94,21 +94,18 @@
     size_t num_mappings);
 
 /*The verifier must not be destroyed if there are still outstanding callbacks.*/
-void grpc_jwt_verifier_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_jwt_verifier* verifier);
+void grpc_jwt_verifier_destroy(grpc_jwt_verifier* verifier);
 
 /* User provided callback that will be called when the verification of the JWT
    is done (maybe in another thread).
    It is the responsibility of the callee to call grpc_jwt_claims_destroy on
    the claims. */
-typedef void (*grpc_jwt_verification_done_cb)(grpc_exec_ctx* exec_ctx,
-                                              void* user_data,
+typedef void (*grpc_jwt_verification_done_cb)(void* user_data,
                                               grpc_jwt_verifier_status status,
                                               grpc_jwt_claims* claims);
 
 /* Verifies for the JWT for the given expected audience. */
-void grpc_jwt_verifier_verify(grpc_exec_ctx* exec_ctx,
-                              grpc_jwt_verifier* verifier,
+void grpc_jwt_verifier_verify(grpc_jwt_verifier* verifier,
                               grpc_pollset* pollset, const char* jwt,
                               const char* audience,
                               grpc_jwt_verification_done_cb cb,
@@ -116,8 +113,7 @@
 
 /* --- TESTING ONLY exposed functions. --- */
 
-grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_exec_ctx* exec_ctx,
-                                           grpc_json* json, grpc_slice buffer);
+grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_json* json, grpc_slice buffer);
 grpc_jwt_verifier_status grpc_jwt_claims_check(const grpc_jwt_claims* claims,
                                                const char* audience);
 const char* grpc_jwt_issuer_email_domain(const char* issuer);
diff --git a/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc b/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
index ccefb4d..e243ea5 100644
--- a/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
+++ b/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
@@ -103,21 +103,19 @@
 // Oauth2 Token Fetcher credentials.
 //
 
-static void oauth2_token_fetcher_destruct(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_credentials* creds) {
+static void oauth2_token_fetcher_destruct(grpc_call_credentials* creds) {
   grpc_oauth2_token_fetcher_credentials* c =
       (grpc_oauth2_token_fetcher_credentials*)creds;
-  GRPC_MDELEM_UNREF(exec_ctx, c->access_token_md);
+  GRPC_MDELEM_UNREF(c->access_token_md);
   gpr_mu_destroy(&c->mu);
-  grpc_pollset_set_destroy(exec_ctx,
-                           grpc_polling_entity_pollset_set(&c->pollent));
-  grpc_httpcli_context_destroy(exec_ctx, &c->httpcli_context);
+  grpc_pollset_set_destroy(grpc_polling_entity_pollset_set(&c->pollent));
+  grpc_httpcli_context_destroy(&c->httpcli_context);
 }
 
 grpc_credentials_status
 grpc_oauth2_token_fetcher_credentials_parse_server_response(
-    grpc_exec_ctx* exec_ctx, const grpc_http_response* response,
-    grpc_mdelem* token_md, grpc_millis* token_lifetime) {
+    const grpc_http_response* response, grpc_mdelem* token_md,
+    grpc_millis* token_lifetime) {
   char* null_terminated_body = nullptr;
   char* new_access_token = nullptr;
   grpc_credentials_status status = GRPC_CREDENTIALS_OK;
@@ -184,9 +182,8 @@
     gpr_asprintf(&new_access_token, "%s %s", token_type->value,
                  access_token->value);
     *token_lifetime = strtol(expires_in->value, nullptr, 10) * GPR_MS_PER_SEC;
-    if (!GRPC_MDISNULL(*token_md)) GRPC_MDELEM_UNREF(exec_ctx, *token_md);
+    if (!GRPC_MDISNULL(*token_md)) GRPC_MDELEM_UNREF(*token_md);
     *token_md = grpc_mdelem_from_slices(
-        exec_ctx,
         grpc_slice_from_static_string(GRPC_AUTHORIZATION_METADATA_KEY),
         grpc_slice_from_copied_string(new_access_token));
     status = GRPC_CREDENTIALS_OK;
@@ -194,7 +191,7 @@
 
 end:
   if (status != GRPC_CREDENTIALS_OK && !GRPC_MDISNULL(*token_md)) {
-    GRPC_MDELEM_UNREF(exec_ctx, *token_md);
+    GRPC_MDELEM_UNREF(*token_md);
     *token_md = GRPC_MDNULL;
   }
   if (null_terminated_body != nullptr) gpr_free(null_terminated_body);
@@ -203,8 +200,7 @@
   return status;
 }
 
-static void on_oauth2_token_fetcher_http_response(grpc_exec_ctx* exec_ctx,
-                                                  void* user_data,
+static void on_oauth2_token_fetcher_http_response(void* user_data,
                                                   grpc_error* error) {
   GRPC_LOG_IF_ERROR("oauth_fetch", GRPC_ERROR_REF(error));
   grpc_credentials_metadata_request* r =
@@ -215,13 +211,13 @@
   grpc_millis token_lifetime;
   grpc_credentials_status status =
       grpc_oauth2_token_fetcher_credentials_parse_server_response(
-          exec_ctx, &r->response, &access_token_md, &token_lifetime);
+          &r->response, &access_token_md, &token_lifetime);
   // Update cache and grab list of pending requests.
   gpr_mu_lock(&c->mu);
   c->token_fetch_pending = false;
   c->access_token_md = GRPC_MDELEM_REF(access_token_md);
   c->token_expiration = status == GRPC_CREDENTIALS_OK
-                            ? grpc_exec_ctx_now(exec_ctx) + token_lifetime
+                            ? grpc_core::ExecCtx::Get()->Now() + token_lifetime
                             : 0;
   grpc_oauth2_pending_get_request_metadata* pending_request =
       c->pending_requests;
@@ -236,24 +232,22 @@
       error = GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
           "Error occured when fetching oauth2 token.", &error, 1);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, pending_request->on_request_metadata, error);
+    GRPC_CLOSURE_SCHED(pending_request->on_request_metadata, error);
     grpc_polling_entity_del_from_pollset_set(
-        exec_ctx, pending_request->pollent,
-        grpc_polling_entity_pollset_set(&c->pollent));
+        pending_request->pollent, grpc_polling_entity_pollset_set(&c->pollent));
     grpc_oauth2_pending_get_request_metadata* prev = pending_request;
     pending_request = pending_request->next;
     gpr_free(prev);
   }
-  GRPC_MDELEM_UNREF(exec_ctx, access_token_md);
-  grpc_call_credentials_unref(exec_ctx, r->creds);
-  grpc_credentials_metadata_request_destroy(exec_ctx, r);
+  GRPC_MDELEM_UNREF(access_token_md);
+  grpc_call_credentials_unref(r->creds);
+  grpc_credentials_metadata_request_destroy(r);
 }
 
 static bool oauth2_token_fetcher_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error) {
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error) {
   grpc_oauth2_token_fetcher_credentials* c =
       (grpc_oauth2_token_fetcher_credentials*)creds;
   // Check if we can use the cached token.
@@ -262,13 +256,14 @@
   grpc_mdelem cached_access_token_md = GRPC_MDNULL;
   gpr_mu_lock(&c->mu);
   if (!GRPC_MDISNULL(c->access_token_md) &&
-      (c->token_expiration - grpc_exec_ctx_now(exec_ctx) > refresh_threshold)) {
+      (c->token_expiration - grpc_core::ExecCtx::Get()->Now() >
+       refresh_threshold)) {
     cached_access_token_md = GRPC_MDELEM_REF(c->access_token_md);
   }
   if (!GRPC_MDISNULL(cached_access_token_md)) {
     gpr_mu_unlock(&c->mu);
     grpc_credentials_mdelem_array_add(md_array, cached_access_token_md);
-    GRPC_MDELEM_UNREF(exec_ctx, cached_access_token_md);
+    GRPC_MDELEM_UNREF(cached_access_token_md);
     return true;
   }
   // Couldn't get the token from the cache.
@@ -280,7 +275,7 @@
   pending_request->on_request_metadata = on_request_metadata;
   pending_request->pollent = pollent;
   grpc_polling_entity_add_to_pollset_set(
-      exec_ctx, pollent, grpc_polling_entity_pollset_set(&c->pollent));
+      pollent, grpc_polling_entity_pollset_set(&c->pollent));
   pending_request->next = c->pending_requests;
   c->pending_requests = pending_request;
   bool start_fetch = false;
@@ -291,17 +286,17 @@
   gpr_mu_unlock(&c->mu);
   if (start_fetch) {
     grpc_call_credentials_ref(creds);
-    c->fetch_func(exec_ctx, grpc_credentials_metadata_request_create(creds),
+    c->fetch_func(grpc_credentials_metadata_request_create(creds),
                   &c->httpcli_context, &c->pollent,
                   on_oauth2_token_fetcher_http_response,
-                  grpc_exec_ctx_now(exec_ctx) + refresh_threshold);
+                  grpc_core::ExecCtx::Get()->Now() + refresh_threshold);
   }
   return false;
 }
 
 static void oauth2_token_fetcher_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   grpc_oauth2_token_fetcher_credentials* c =
       (grpc_oauth2_token_fetcher_credentials*)creds;
   gpr_mu_lock(&c->mu);
@@ -317,7 +312,7 @@
         c->pending_requests = pending_request->next;
       }
       // Invoke the callback immediately with an error.
-      GRPC_CLOSURE_SCHED(exec_ctx, pending_request->on_request_metadata,
+      GRPC_CLOSURE_SCHED(pending_request->on_request_metadata,
                          GRPC_ERROR_REF(error));
       gpr_free(pending_request);
       break;
@@ -351,7 +346,7 @@
     oauth2_token_fetcher_cancel_get_request_metadata};
 
 static void compute_engine_fetch_oauth2(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_metadata_request* metadata_req,
+    grpc_credentials_metadata_request* metadata_req,
     grpc_httpcli_context* httpcli_context, grpc_polling_entity* pollent,
     grpc_iomgr_cb_func response_cb, grpc_millis deadline) {
   grpc_http_header header = {(char*)"Metadata-Flavor", (char*)"Google"};
@@ -367,10 +362,10 @@
   grpc_resource_quota* resource_quota =
       grpc_resource_quota_create("oauth2_credentials");
   grpc_httpcli_get(
-      exec_ctx, httpcli_context, pollent, resource_quota, &request, deadline,
+      httpcli_context, pollent, resource_quota, &request, deadline,
       GRPC_CLOSURE_CREATE(response_cb, metadata_req, grpc_schedule_on_exec_ctx),
       &metadata_req->response);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
 }
 
 grpc_call_credentials* grpc_google_compute_engine_credentials_create(
@@ -390,12 +385,11 @@
 // Google Refresh Token credentials.
 //
 
-static void refresh_token_destruct(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_credentials* creds) {
+static void refresh_token_destruct(grpc_call_credentials* creds) {
   grpc_google_refresh_token_credentials* c =
       (grpc_google_refresh_token_credentials*)creds;
   grpc_auth_refresh_token_destruct(&c->refresh_token);
-  oauth2_token_fetcher_destruct(exec_ctx, &c->base.base);
+  oauth2_token_fetcher_destruct(&c->base.base);
 }
 
 static grpc_call_credentials_vtable refresh_token_vtable = {
@@ -403,7 +397,7 @@
     oauth2_token_fetcher_cancel_get_request_metadata};
 
 static void refresh_token_fetch_oauth2(
-    grpc_exec_ctx* exec_ctx, grpc_credentials_metadata_request* metadata_req,
+    grpc_credentials_metadata_request* metadata_req,
     grpc_httpcli_context* httpcli_context, grpc_polling_entity* pollent,
     grpc_iomgr_cb_func response_cb, grpc_millis deadline) {
   grpc_google_refresh_token_credentials* c =
@@ -427,11 +421,11 @@
   grpc_resource_quota* resource_quota =
       grpc_resource_quota_create("oauth2_credentials_refresh");
   grpc_httpcli_post(
-      exec_ctx, httpcli_context, pollent, resource_quota, &request, body,
-      strlen(body), deadline,
+      httpcli_context, pollent, resource_quota, &request, body, strlen(body),
+      deadline,
       GRPC_CLOSURE_CREATE(response_cb, metadata_req, grpc_schedule_on_exec_ctx),
       &metadata_req->response);
-  grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_free(body);
 }
 
@@ -483,25 +477,23 @@
 // Oauth2 Access Token credentials.
 //
 
-static void access_token_destruct(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_credentials* creds) {
+static void access_token_destruct(grpc_call_credentials* creds) {
   grpc_access_token_credentials* c = (grpc_access_token_credentials*)creds;
-  GRPC_MDELEM_UNREF(exec_ctx, c->access_token_md);
+  GRPC_MDELEM_UNREF(c->access_token_md);
 }
 
 static bool access_token_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_polling_entity* pollent, grpc_auth_metadata_context context,
-    grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
-    grpc_error** error) {
+    grpc_call_credentials* creds, grpc_polling_entity* pollent,
+    grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
+    grpc_closure* on_request_metadata, grpc_error** error) {
   grpc_access_token_credentials* c = (grpc_access_token_credentials*)creds;
   grpc_credentials_mdelem_array_add(md_array, c->access_token_md);
   return true;
 }
 
 static void access_token_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* c,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -523,11 +515,11 @@
   gpr_ref_init(&c->base.refcount, 1);
   char* token_md_value;
   gpr_asprintf(&token_md_value, "Bearer %s", access_token);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   c->access_token_md = grpc_mdelem_from_slices(
-      &exec_ctx, grpc_slice_from_static_string(GRPC_AUTHORIZATION_METADATA_KEY),
+      grpc_slice_from_static_string(GRPC_AUTHORIZATION_METADATA_KEY),
       grpc_slice_from_copied_string(token_md_value));
-  grpc_exec_ctx_finish(&exec_ctx);
+
   gpr_free(token_md_value);
   return &c->base;
 }
diff --git a/src/core/lib/security/credentials/oauth2/oauth2_credentials.h b/src/core/lib/security/credentials/oauth2/oauth2_credentials.h
index 627783d..e5b8df8 100644
--- a/src/core/lib/security/credentials/oauth2/oauth2_credentials.h
+++ b/src/core/lib/security/credentials/oauth2/oauth2_credentials.h
@@ -52,8 +52,7 @@
 //  This object is a base for credentials that need to acquire an oauth2 token
 //  from an http service.
 
-typedef void (*grpc_fetch_oauth2_func)(grpc_exec_ctx* exec_ctx,
-                                       grpc_credentials_metadata_request* req,
+typedef void (*grpc_fetch_oauth2_func)(grpc_credentials_metadata_request* req,
                                        grpc_httpcli_context* http_context,
                                        grpc_polling_entity* pollent,
                                        grpc_iomgr_cb_func cb,
@@ -99,7 +98,7 @@
 // Exposed for testing only.
 grpc_credentials_status
 grpc_oauth2_token_fetcher_credentials_parse_server_response(
-    grpc_exec_ctx* exec_ctx, const struct grpc_http_response* response,
-    grpc_mdelem* token_md, grpc_millis* token_lifetime);
+    const struct grpc_http_response* response, grpc_mdelem* token_md,
+    grpc_millis* token_lifetime);
 
 #endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_OAUTH2_OAUTH2_CREDENTIALS_H */
diff --git a/src/core/lib/security/credentials/plugin/plugin_credentials.cc b/src/core/lib/security/credentials/plugin/plugin_credentials.cc
index 1f1efd0..203ba58 100644
--- a/src/core/lib/security/credentials/plugin/plugin_credentials.cc
+++ b/src/core/lib/security/credentials/plugin/plugin_credentials.cc
@@ -33,8 +33,7 @@
 
 grpc_core::TraceFlag grpc_plugin_credentials_trace(false, "plugin_credentials");
 
-static void plugin_destruct(grpc_exec_ctx* exec_ctx,
-                            grpc_call_credentials* creds) {
+static void plugin_destruct(grpc_call_credentials* creds) {
   grpc_plugin_credentials* c = (grpc_plugin_credentials*)creds;
   gpr_mu_destroy(&c->mu);
   if (c->plugin.state != nullptr && c->plugin.destroy != nullptr) {
@@ -61,18 +60,17 @@
 // When this returns, r->cancelled indicates whether the request was
 // cancelled before completion.
 static void pending_request_complete(
-    grpc_exec_ctx* exec_ctx, grpc_plugin_credentials_pending_request* r) {
+    grpc_plugin_credentials_pending_request* r) {
   gpr_mu_lock(&r->creds->mu);
   if (!r->cancelled) pending_request_remove_locked(r->creds, r);
   gpr_mu_unlock(&r->creds->mu);
   // Ref to credentials not needed anymore.
-  grpc_call_credentials_unref(exec_ctx, &r->creds->base);
+  grpc_call_credentials_unref(&r->creds->base);
 }
 
 static grpc_error* process_plugin_result(
-    grpc_exec_ctx* exec_ctx, grpc_plugin_credentials_pending_request* r,
-    const grpc_metadata* md, size_t num_md, grpc_status_code status,
-    const char* error_details) {
+    grpc_plugin_credentials_pending_request* r, const grpc_metadata* md,
+    size_t num_md, grpc_status_code status, const char* error_details) {
   grpc_error* error = GRPC_ERROR_NONE;
   if (status != GRPC_STATUS_OK) {
     char* msg;
@@ -100,11 +98,11 @@
       error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Illegal metadata");
     } else {
       for (size_t i = 0; i < num_md; ++i) {
-        grpc_mdelem mdelem = grpc_mdelem_from_slices(
-            exec_ctx, grpc_slice_ref_internal(md[i].key),
-            grpc_slice_ref_internal(md[i].value));
+        grpc_mdelem mdelem =
+            grpc_mdelem_from_slices(grpc_slice_ref_internal(md[i].key),
+                                    grpc_slice_ref_internal(md[i].value));
         grpc_credentials_mdelem_array_add(r->md_array, mdelem);
-        GRPC_MDELEM_UNREF(exec_ctx, mdelem);
+        GRPC_MDELEM_UNREF(mdelem);
       }
     }
   }
@@ -117,9 +115,8 @@
                                              grpc_status_code status,
                                              const char* error_details) {
   /* called from application code */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INITIALIZER(
-      GRPC_EXEC_CTX_FLAG_IS_FINISHED | GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP,
-      nullptr, nullptr);
+  grpc_core::ExecCtx exec_ctx(GRPC_EXEC_CTX_FLAG_IS_FINISHED |
+                              GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP);
   grpc_plugin_credentials_pending_request* r =
       (grpc_plugin_credentials_pending_request*)request;
   if (grpc_plugin_credentials_trace.enabled()) {
@@ -129,12 +126,12 @@
             r->creds, r);
   }
   // Remove request from pending list if not previously cancelled.
-  pending_request_complete(&exec_ctx, r);
+  pending_request_complete(r);
   // If it has not been cancelled, process it.
   if (!r->cancelled) {
     grpc_error* error =
-        process_plugin_result(&exec_ctx, r, md, num_md, status, error_details);
-    GRPC_CLOSURE_SCHED(&exec_ctx, r->on_request_metadata, error);
+        process_plugin_result(r, md, num_md, status, error_details);
+    GRPC_CLOSURE_SCHED(r->on_request_metadata, error);
   } else if (grpc_plugin_credentials_trace.enabled()) {
     gpr_log(GPR_INFO,
             "plugin_credentials[%p]: request %p: plugin was previously "
@@ -142,11 +139,9 @@
             r->creds, r);
   }
   gpr_free(r);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static bool plugin_get_request_metadata(grpc_exec_ctx* exec_ctx,
-                                        grpc_call_credentials* creds,
+static bool plugin_get_request_metadata(grpc_call_credentials* creds,
                                         grpc_polling_entity* pollent,
                                         grpc_auth_metadata_context context,
                                         grpc_credentials_mdelem_array* md_array,
@@ -194,7 +189,7 @@
     }
     // Returned synchronously.
     // Remove request from pending list if not previously cancelled.
-    pending_request_complete(exec_ctx, pending_request);
+    pending_request_complete(pending_request);
     // If the request was cancelled, the error will have been returned
     // asynchronously by plugin_cancel_get_request_metadata(), so return
     // false.  Otherwise, process the result.
@@ -213,13 +208,13 @@
                 "synchronously",
                 c, pending_request);
       }
-      *error = process_plugin_result(exec_ctx, pending_request, creds_md,
-                                     num_creds_md, status, error_details);
+      *error = process_plugin_result(pending_request, creds_md, num_creds_md,
+                                     status, error_details);
     }
     // Clean up.
     for (size_t i = 0; i < num_creds_md; ++i) {
-      grpc_slice_unref_internal(exec_ctx, creds_md[i].key);
-      grpc_slice_unref_internal(exec_ctx, creds_md[i].value);
+      grpc_slice_unref_internal(creds_md[i].key);
+      grpc_slice_unref_internal(creds_md[i].value);
     }
     gpr_free((void*)error_details);
     gpr_free(pending_request);
@@ -228,8 +223,8 @@
 }
 
 static void plugin_cancel_get_request_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call_credentials* creds,
-    grpc_credentials_mdelem_array* md_array, grpc_error* error) {
+    grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
   grpc_plugin_credentials* c = (grpc_plugin_credentials*)creds;
   gpr_mu_lock(&c->mu);
   for (grpc_plugin_credentials_pending_request* pending_request =
@@ -241,7 +236,7 @@
                 pending_request);
       }
       pending_request->cancelled = true;
-      GRPC_CLOSURE_SCHED(exec_ctx, pending_request->on_request_metadata,
+      GRPC_CLOSURE_SCHED(pending_request->on_request_metadata,
                          GRPC_ERROR_REF(error));
       pending_request_remove_locked(c, pending_request);
       break;
diff --git a/src/core/lib/security/credentials/ssl/ssl_credentials.cc b/src/core/lib/security/credentials/ssl/ssl_credentials.cc
index 39dd38c..d854644 100644
--- a/src/core/lib/security/credentials/ssl/ssl_credentials.cc
+++ b/src/core/lib/security/credentials/ssl/ssl_credentials.cc
@@ -41,18 +41,16 @@
   gpr_free(kp);
 }
 
-static void ssl_destruct(grpc_exec_ctx* exec_ctx,
-                         grpc_channel_credentials* creds) {
+static void ssl_destruct(grpc_channel_credentials* creds) {
   grpc_ssl_credentials* c = (grpc_ssl_credentials*)creds;
   gpr_free(c->config.pem_root_certs);
   grpc_tsi_ssl_pem_key_cert_pairs_destroy(c->config.pem_key_cert_pair, 1);
 }
 
 static grpc_security_status ssl_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* creds,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* creds, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   grpc_ssl_credentials* c = (grpc_ssl_credentials*)creds;
   grpc_security_status status = GRPC_SECURITY_OK;
   const char* overridden_target_name = nullptr;
@@ -65,8 +63,7 @@
     }
   }
   status = grpc_ssl_channel_security_connector_create(
-      exec_ctx, creds, call_creds, &c->config, target, overridden_target_name,
-      sc);
+      creds, call_creds, &c->config, target, overridden_target_name, sc);
   if (status != GRPC_SECURITY_OK) {
     return status;
   }
@@ -125,8 +122,7 @@
   grpc_ssl_server_certificate_config_fetcher* certificate_config_fetcher;
 };
 
-static void ssl_server_destruct(grpc_exec_ctx* exec_ctx,
-                                grpc_server_credentials* creds) {
+static void ssl_server_destruct(grpc_server_credentials* creds) {
   grpc_ssl_server_credentials* c = (grpc_ssl_server_credentials*)creds;
   grpc_tsi_ssl_pem_key_cert_pairs_destroy(c->config.pem_key_cert_pairs,
                                           c->config.num_key_cert_pairs);
@@ -134,9 +130,8 @@
 }
 
 static grpc_security_status ssl_server_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* creds,
-    grpc_server_security_connector** sc) {
-  return grpc_ssl_server_security_connector_create(exec_ctx, creds, sc);
+    grpc_server_credentials* creds, grpc_server_security_connector** sc) {
+  return grpc_ssl_server_security_connector_create(creds, sc);
 }
 
 static grpc_server_credentials_vtable ssl_server_vtable = {
diff --git a/src/core/lib/security/transport/client_auth_filter.cc b/src/core/lib/security/transport/client_auth_filter.cc
index 326f4d7..cd3c2e3 100644
--- a/src/core/lib/security/transport/client_auth_filter.cc
+++ b/src/core/lib/security/transport/client_auth_filter.cc
@@ -90,8 +90,7 @@
   *combined = grpc_error_add_child(*combined, error);
 }
 
-static void on_credentials_metadata(grpc_exec_ctx* exec_ctx, void* arg,
-                                    grpc_error* input_error) {
+static void on_credentials_metadata(void* arg, grpc_error* input_error) {
   grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
   grpc_call_element* elem =
       (grpc_call_element*)batch->handler_private.extra_arg;
@@ -105,16 +104,16 @@
         batch->payload->send_initial_metadata.send_initial_metadata;
     for (size_t i = 0; i < calld->md_array.size; ++i) {
       add_error(&error, grpc_metadata_batch_add_tail(
-                            exec_ctx, mdb, &calld->md_links[i],
+                            mdb, &calld->md_links[i],
                             GRPC_MDELEM_REF(calld->md_array.md[i])));
     }
   }
   if (error == GRPC_ERROR_NONE) {
-    grpc_call_next_op(exec_ctx, elem, batch);
+    grpc_call_next_op(elem, batch);
   } else {
     error = grpc_error_set_int(error, GRPC_ERROR_INT_GRPC_STATUS,
                                GRPC_STATUS_UNAUTHENTICATED);
-    grpc_transport_stream_op_batch_finish_with_failure(exec_ctx, batch, error,
+    grpc_transport_stream_op_batch_finish_with_failure(batch, error,
                                                        calld->call_combiner);
   }
 }
@@ -156,20 +155,17 @@
   gpr_free(host_and_port);
 }
 
-static void cancel_get_request_metadata(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void cancel_get_request_metadata(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   if (error != GRPC_ERROR_NONE) {
     grpc_call_credentials_cancel_get_request_metadata(
-        exec_ctx, calld->creds, &calld->md_array, GRPC_ERROR_REF(error));
+        calld->creds, &calld->md_array, GRPC_ERROR_REF(error));
   }
-  GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call,
-                        "cancel_get_request_metadata");
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "cancel_get_request_metadata");
 }
 
-static void send_security_metadata(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void send_security_metadata(grpc_call_element* elem,
                                    grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -183,7 +179,7 @@
 
   if (channel_call_creds == nullptr && !call_creds_has_md) {
     /* Skip sending metadata altogether. */
-    grpc_call_next_op(exec_ctx, elem, batch);
+    grpc_call_next_op(elem, batch);
     return;
   }
 
@@ -192,7 +188,7 @@
                                                           ctx->creds, nullptr);
     if (calld->creds == nullptr) {
       grpc_transport_stream_op_batch_finish_with_failure(
-          exec_ctx, batch,
+          batch,
           grpc_error_set_int(
               GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                   "Incompatible credentials set on channel and call."),
@@ -215,30 +211,29 @@
                     batch, grpc_schedule_on_exec_ctx);
   grpc_error* error = GRPC_ERROR_NONE;
   if (grpc_call_credentials_get_request_metadata(
-          exec_ctx, calld->creds, calld->pollent, calld->auth_md_context,
+          calld->creds, calld->pollent, calld->auth_md_context,
           &calld->md_array, &calld->async_result_closure, &error)) {
     // Synchronous return; invoke on_credentials_metadata() directly.
-    on_credentials_metadata(exec_ctx, batch, error);
+    on_credentials_metadata(batch, error);
     GRPC_ERROR_UNREF(error);
   } else {
     // Async return; register cancellation closure with call combiner.
     GRPC_CALL_STACK_REF(calld->owning_call, "cancel_get_request_metadata");
     grpc_call_combiner_set_notify_on_cancel(
-        exec_ctx, calld->call_combiner,
+        calld->call_combiner,
         GRPC_CLOSURE_INIT(&calld->get_request_metadata_cancel_closure,
                           cancel_get_request_metadata, elem,
                           grpc_schedule_on_exec_ctx));
   }
 }
 
-static void on_host_checked(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void on_host_checked(void* arg, grpc_error* error) {
   grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
   grpc_call_element* elem =
       (grpc_call_element*)batch->handler_private.extra_arg;
   call_data* calld = (call_data*)elem->call_data;
   if (error == GRPC_ERROR_NONE) {
-    send_security_metadata(exec_ctx, elem, batch);
+    send_security_metadata(elem, batch);
   } else {
     char* error_msg;
     char* host = grpc_slice_to_c_string(calld->host);
@@ -246,7 +241,7 @@
                  host);
     gpr_free(host);
     grpc_transport_stream_op_batch_finish_with_failure(
-        exec_ctx, batch,
+        batch,
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_msg),
                            GRPC_ERROR_INT_GRPC_STATUS,
                            GRPC_STATUS_UNAUTHENTICATED),
@@ -255,22 +250,20 @@
   }
 }
 
-static void cancel_check_call_host(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void cancel_check_call_host(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (error != GRPC_ERROR_NONE) {
     grpc_channel_security_connector_cancel_check_call_host(
-        exec_ctx, chand->security_connector, &calld->async_result_closure,
+        chand->security_connector, &calld->async_result_closure,
         GRPC_ERROR_REF(error));
   }
-  GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "cancel_check_call_host");
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "cancel_check_call_host");
 }
 
 static void auth_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   GPR_TIMER_BEGIN("auth_start_transport_stream_op_batch", 0);
 
   /* grab pointers to our data from the call element */
@@ -303,13 +296,13 @@
        */
       if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_AUTHORITY)) {
         if (calld->have_host) {
-          grpc_slice_unref_internal(exec_ctx, calld->host);
+          grpc_slice_unref_internal(calld->host);
         }
         calld->host = grpc_slice_ref_internal(GRPC_MDVALUE(md));
         calld->have_host = true;
       } else if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_PATH)) {
         if (calld->have_method) {
-          grpc_slice_unref_internal(exec_ctx, calld->method);
+          grpc_slice_unref_internal(calld->method);
         }
         calld->method = grpc_slice_ref_internal(GRPC_MDVALUE(md));
         calld->have_method = true;
@@ -322,16 +315,16 @@
       char* call_host = grpc_slice_to_c_string(calld->host);
       grpc_error* error = GRPC_ERROR_NONE;
       if (grpc_channel_security_connector_check_call_host(
-              exec_ctx, chand->security_connector, call_host,
-              chand->auth_context, &calld->async_result_closure, &error)) {
+              chand->security_connector, call_host, chand->auth_context,
+              &calld->async_result_closure, &error)) {
         // Synchronous return; invoke on_host_checked() directly.
-        on_host_checked(exec_ctx, batch, error);
+        on_host_checked(batch, error);
         GRPC_ERROR_UNREF(error);
       } else {
         // Async return; register cancellation closure with call combiner.
         GRPC_CALL_STACK_REF(calld->owning_call, "cancel_check_call_host");
         grpc_call_combiner_set_notify_on_cancel(
-            exec_ctx, calld->call_combiner,
+            calld->call_combiner,
             GRPC_CLOSURE_INIT(&calld->check_call_host_cancel_closure,
                               cancel_check_call_host, elem,
                               grpc_schedule_on_exec_ctx));
@@ -343,13 +336,12 @@
   }
 
   /* pass control down the stack */
-  grpc_call_next_op(exec_ctx, elem, batch);
+  grpc_call_next_op(elem, batch);
   GPR_TIMER_END("auth_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   calld->owning_call = args->call_stack;
@@ -357,32 +349,30 @@
   return GRPC_ERROR_NONE;
 }
 
-static void set_pollset_or_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_call_element* elem,
+static void set_pollset_or_pollset_set(grpc_call_element* elem,
                                        grpc_polling_entity* pollent) {
   call_data* calld = (call_data*)elem->call_data;
   calld->pollent = pollent;
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   call_data* calld = (call_data*)elem->call_data;
-  grpc_credentials_mdelem_array_destroy(exec_ctx, &calld->md_array);
-  grpc_call_credentials_unref(exec_ctx, calld->creds);
+  grpc_credentials_mdelem_array_destroy(&calld->md_array);
+  grpc_call_credentials_unref(calld->creds);
   if (calld->have_host) {
-    grpc_slice_unref_internal(exec_ctx, calld->host);
+    grpc_slice_unref_internal(calld->host);
   }
   if (calld->have_method) {
-    grpc_slice_unref_internal(exec_ctx, calld->method);
+    grpc_slice_unref_internal(calld->method);
   }
   grpc_auth_metadata_context_reset(&calld->auth_md_context);
 }
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   grpc_security_connector* sc =
       grpc_security_connector_find_in_args(args->channel_args);
@@ -415,13 +405,12 @@
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   /* grab pointers to our data from the channel element */
   channel_data* chand = (channel_data*)elem->channel_data;
   grpc_channel_security_connector* sc = chand->security_connector;
   if (sc != nullptr) {
-    GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, &sc->base, "client_auth_filter");
+    GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "client_auth_filter");
   }
   GRPC_AUTH_CONTEXT_UNREF(chand->auth_context, "client_auth_filter");
 }
diff --git a/src/core/lib/security/transport/lb_targets_info.cc b/src/core/lib/security/transport/lb_targets_info.cc
index c07be35..183b1eb 100644
--- a/src/core/lib/security/transport/lb_targets_info.cc
+++ b/src/core/lib/security/transport/lb_targets_info.cc
@@ -28,8 +28,8 @@
 static void* targets_info_copy(void* p) {
   return grpc_slice_hash_table_ref((grpc_slice_hash_table*)p);
 }
-static void targets_info_destroy(grpc_exec_ctx* exec_ctx, void* p) {
-  grpc_slice_hash_table_unref(exec_ctx, (grpc_slice_hash_table*)p);
+static void targets_info_destroy(void* p) {
+  grpc_slice_hash_table_unref((grpc_slice_hash_table*)p);
 }
 static int targets_info_cmp(void* a, void* b) {
   return grpc_slice_hash_table_cmp((const grpc_slice_hash_table*)a,
diff --git a/src/core/lib/security/transport/secure_endpoint.cc b/src/core/lib/security/transport/secure_endpoint.cc
index 4cd317a..e5c089d 100644
--- a/src/core/lib/security/transport/secure_endpoint.cc
+++ b/src/core/lib/security/transport/secure_endpoint.cc
@@ -63,28 +63,27 @@
 
 grpc_core::TraceFlag grpc_trace_secure_endpoint(false, "secure_endpoint");
 
-static void destroy(grpc_exec_ctx* exec_ctx, secure_endpoint* secure_ep) {
+static void destroy(secure_endpoint* secure_ep) {
   secure_endpoint* ep = secure_ep;
-  grpc_endpoint_destroy(exec_ctx, ep->wrapped_ep);
+  grpc_endpoint_destroy(ep->wrapped_ep);
   tsi_frame_protector_destroy(ep->protector);
-  tsi_zero_copy_grpc_protector_destroy(exec_ctx, ep->zero_copy_protector);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &ep->leftover_bytes);
-  grpc_slice_unref_internal(exec_ctx, ep->read_staging_buffer);
-  grpc_slice_unref_internal(exec_ctx, ep->write_staging_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &ep->output_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &ep->source_buffer);
+  tsi_zero_copy_grpc_protector_destroy(ep->zero_copy_protector);
+  grpc_slice_buffer_destroy_internal(&ep->leftover_bytes);
+  grpc_slice_unref_internal(ep->read_staging_buffer);
+  grpc_slice_unref_internal(ep->write_staging_buffer);
+  grpc_slice_buffer_destroy_internal(&ep->output_buffer);
+  grpc_slice_buffer_destroy_internal(&ep->source_buffer);
   gpr_mu_destroy(&ep->protector_mu);
   gpr_free(ep);
 }
 
 #ifndef NDEBUG
-#define SECURE_ENDPOINT_UNREF(exec_ctx, ep, reason) \
-  secure_endpoint_unref((exec_ctx), (ep), (reason), __FILE__, __LINE__)
+#define SECURE_ENDPOINT_UNREF(ep, reason) \
+  secure_endpoint_unref((ep), (reason), __FILE__, __LINE__)
 #define SECURE_ENDPOINT_REF(ep, reason) \
   secure_endpoint_ref((ep), (reason), __FILE__, __LINE__)
-static void secure_endpoint_unref(grpc_exec_ctx* exec_ctx, secure_endpoint* ep,
-                                  const char* reason, const char* file,
-                                  int line) {
+static void secure_endpoint_unref(secure_endpoint* ep, const char* reason,
+                                  const char* file, int line) {
   if (grpc_trace_secure_endpoint.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&ep->ref.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -92,7 +91,7 @@
             val - 1);
   }
   if (gpr_unref(&ep->ref)) {
-    destroy(exec_ctx, ep);
+    destroy(ep);
   }
 }
 
@@ -107,13 +106,11 @@
   gpr_ref(&ep->ref);
 }
 #else
-#define SECURE_ENDPOINT_UNREF(exec_ctx, ep, reason) \
-  secure_endpoint_unref((exec_ctx), (ep))
+#define SECURE_ENDPOINT_UNREF(ep, reason) secure_endpoint_unref((ep))
 #define SECURE_ENDPOINT_REF(ep, reason) secure_endpoint_ref((ep))
-static void secure_endpoint_unref(grpc_exec_ctx* exec_ctx,
-                                  secure_endpoint* ep) {
+static void secure_endpoint_unref(secure_endpoint* ep) {
   if (gpr_unref(&ep->ref)) {
-    destroy(exec_ctx, ep);
+    destroy(ep);
   }
 }
 
@@ -128,8 +125,7 @@
   *end = GRPC_SLICE_END_PTR(ep->read_staging_buffer);
 }
 
-static void call_read_cb(grpc_exec_ctx* exec_ctx, secure_endpoint* ep,
-                         grpc_error* error) {
+static void call_read_cb(secure_endpoint* ep, grpc_error* error) {
   if (grpc_trace_secure_endpoint.enabled()) {
     size_t i;
     for (i = 0; i < ep->read_buffer->count; i++) {
@@ -140,12 +136,11 @@
     }
   }
   ep->read_buffer = nullptr;
-  GRPC_CLOSURE_SCHED(exec_ctx, ep->read_cb, error);
-  SECURE_ENDPOINT_UNREF(exec_ctx, ep, "read");
+  GRPC_CLOSURE_SCHED(ep->read_cb, error);
+  SECURE_ENDPOINT_UNREF(ep, "read");
 }
 
-static void on_read(grpc_exec_ctx* exec_ctx, void* user_data,
-                    grpc_error* error) {
+static void on_read(void* user_data, grpc_error* error) {
   unsigned i;
   uint8_t keep_looping = 0;
   tsi_result result = TSI_OK;
@@ -154,17 +149,16 @@
   uint8_t* end = GRPC_SLICE_END_PTR(ep->read_staging_buffer);
 
   if (error != GRPC_ERROR_NONE) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, ep->read_buffer);
-    call_read_cb(exec_ctx, ep,
-                 GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-                     "Secure read failed", &error, 1));
+    grpc_slice_buffer_reset_and_unref_internal(ep->read_buffer);
+    call_read_cb(ep, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                         "Secure read failed", &error, 1));
     return;
   }
 
   if (ep->zero_copy_protector != nullptr) {
     // Use zero-copy grpc protector to unprotect.
     result = tsi_zero_copy_grpc_protector_unprotect(
-        exec_ctx, ep->zero_copy_protector, &ep->source_buffer, ep->read_buffer);
+        ep->zero_copy_protector, &ep->source_buffer, ep->read_buffer);
   } else {
     // Use frame protector to unprotect.
     /* TODO(yangg) check error, maybe bail out early */
@@ -217,37 +211,35 @@
 
   /* TODO(yangg) experiment with moving this block after read_cb to see if it
      helps latency */
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &ep->source_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(&ep->source_buffer);
 
   if (result != TSI_OK) {
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, ep->read_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(ep->read_buffer);
     call_read_cb(
-        exec_ctx, ep,
-        grpc_set_tsi_error_result(
-            GRPC_ERROR_CREATE_FROM_STATIC_STRING("Unwrap failed"), result));
+        ep, grpc_set_tsi_error_result(
+                GRPC_ERROR_CREATE_FROM_STATIC_STRING("Unwrap failed"), result));
     return;
   }
 
-  call_read_cb(exec_ctx, ep, GRPC_ERROR_NONE);
+  call_read_cb(ep, GRPC_ERROR_NONE);
 }
 
-static void endpoint_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
-                          grpc_slice_buffer* slices, grpc_closure* cb) {
+static void endpoint_read(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
+                          grpc_closure* cb) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
   ep->read_cb = cb;
   ep->read_buffer = slices;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, ep->read_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(ep->read_buffer);
 
   SECURE_ENDPOINT_REF(ep, "read");
   if (ep->leftover_bytes.count) {
     grpc_slice_buffer_swap(&ep->leftover_bytes, &ep->source_buffer);
     GPR_ASSERT(ep->leftover_bytes.count == 0);
-    on_read(exec_ctx, ep, GRPC_ERROR_NONE);
+    on_read(ep, GRPC_ERROR_NONE);
     return;
   }
 
-  grpc_endpoint_read(exec_ctx, ep->wrapped_ep, &ep->source_buffer,
-                     &ep->on_read);
+  grpc_endpoint_read(ep->wrapped_ep, &ep->source_buffer, &ep->on_read);
 }
 
 static void flush_write_staging_buffer(secure_endpoint* ep, uint8_t** cur,
@@ -258,8 +250,8 @@
   *end = GRPC_SLICE_END_PTR(ep->write_staging_buffer);
 }
 
-static void endpoint_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
-                           grpc_slice_buffer* slices, grpc_closure* cb) {
+static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
+                           grpc_closure* cb) {
   GPR_TIMER_BEGIN("secure_endpoint.endpoint_write", 0);
 
   unsigned i;
@@ -268,7 +260,7 @@
   uint8_t* cur = GRPC_SLICE_START_PTR(ep->write_staging_buffer);
   uint8_t* end = GRPC_SLICE_END_PTR(ep->write_staging_buffer);
 
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &ep->output_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(&ep->output_buffer);
 
   if (grpc_trace_secure_endpoint.enabled()) {
     for (i = 0; i < slices->count; i++) {
@@ -281,8 +273,8 @@
 
   if (ep->zero_copy_protector != nullptr) {
     // Use zero-copy grpc protector to protect.
-    result = tsi_zero_copy_grpc_protector_protect(
-        exec_ctx, ep->zero_copy_protector, slices, &ep->output_buffer);
+    result = tsi_zero_copy_grpc_protector_protect(ep->zero_copy_protector,
+                                                  slices, &ep->output_buffer);
   } else {
     // Use frame protector to protect.
     for (i = 0; i < slices->count; i++) {
@@ -340,50 +332,44 @@
 
   if (result != TSI_OK) {
     /* TODO(yangg) do different things according to the error type? */
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &ep->output_buffer);
+    grpc_slice_buffer_reset_and_unref_internal(&ep->output_buffer);
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb,
-        grpc_set_tsi_error_result(
-            GRPC_ERROR_CREATE_FROM_STATIC_STRING("Wrap failed"), result));
+        cb, grpc_set_tsi_error_result(
+                GRPC_ERROR_CREATE_FROM_STATIC_STRING("Wrap failed"), result));
     GPR_TIMER_END("secure_endpoint.endpoint_write", 0);
     return;
   }
 
-  grpc_endpoint_write(exec_ctx, ep->wrapped_ep, &ep->output_buffer, cb);
+  grpc_endpoint_write(ep->wrapped_ep, &ep->output_buffer, cb);
   GPR_TIMER_END("secure_endpoint.endpoint_write", 0);
 }
 
-static void endpoint_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* secure_ep,
-                              grpc_error* why) {
+static void endpoint_shutdown(grpc_endpoint* secure_ep, grpc_error* why) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  grpc_endpoint_shutdown(exec_ctx, ep->wrapped_ep, why);
+  grpc_endpoint_shutdown(ep->wrapped_ep, why);
 }
 
-static void endpoint_destroy(grpc_exec_ctx* exec_ctx,
-                             grpc_endpoint* secure_ep) {
+static void endpoint_destroy(grpc_endpoint* secure_ep) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  SECURE_ENDPOINT_UNREF(exec_ctx, ep, "destroy");
+  SECURE_ENDPOINT_UNREF(ep, "destroy");
 }
 
-static void endpoint_add_to_pollset(grpc_exec_ctx* exec_ctx,
-                                    grpc_endpoint* secure_ep,
+static void endpoint_add_to_pollset(grpc_endpoint* secure_ep,
                                     grpc_pollset* pollset) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  grpc_endpoint_add_to_pollset(exec_ctx, ep->wrapped_ep, pollset);
+  grpc_endpoint_add_to_pollset(ep->wrapped_ep, pollset);
 }
 
-static void endpoint_add_to_pollset_set(grpc_exec_ctx* exec_ctx,
-                                        grpc_endpoint* secure_ep,
+static void endpoint_add_to_pollset_set(grpc_endpoint* secure_ep,
                                         grpc_pollset_set* pollset_set) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  grpc_endpoint_add_to_pollset_set(exec_ctx, ep->wrapped_ep, pollset_set);
+  grpc_endpoint_add_to_pollset_set(ep->wrapped_ep, pollset_set);
 }
 
-static void endpoint_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                             grpc_endpoint* secure_ep,
+static void endpoint_delete_from_pollset_set(grpc_endpoint* secure_ep,
                                              grpc_pollset_set* pollset_set) {
   secure_endpoint* ep = (secure_endpoint*)secure_ep;
-  grpc_endpoint_delete_from_pollset_set(exec_ctx, ep->wrapped_ep, pollset_set);
+  grpc_endpoint_delete_from_pollset_set(ep->wrapped_ep, pollset_set);
 }
 
 static char* endpoint_get_peer(grpc_endpoint* secure_ep) {
diff --git a/src/core/lib/security/transport/security_connector.cc b/src/core/lib/security/transport/security_connector.cc
index c56e459..fd13971 100644
--- a/src/core/lib/security/transport/security_connector.cc
+++ b/src/core/lib/security/transport/security_connector.cc
@@ -105,33 +105,32 @@
 }
 
 void grpc_channel_security_connector_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* connector,
+    grpc_channel_security_connector* connector,
     grpc_handshake_manager* handshake_mgr) {
   if (connector != nullptr) {
-    connector->add_handshakers(exec_ctx, connector, handshake_mgr);
+    connector->add_handshakers(connector, handshake_mgr);
   }
 }
 
 void grpc_server_security_connector_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_server_security_connector* connector,
+    grpc_server_security_connector* connector,
     grpc_handshake_manager* handshake_mgr) {
   if (connector != nullptr) {
-    connector->add_handshakers(exec_ctx, connector, handshake_mgr);
+    connector->add_handshakers(connector, handshake_mgr);
   }
 }
 
-void grpc_security_connector_check_peer(grpc_exec_ctx* exec_ctx,
-                                        grpc_security_connector* sc,
+void grpc_security_connector_check_peer(grpc_security_connector* sc,
                                         tsi_peer peer,
                                         grpc_auth_context** auth_context,
                                         grpc_closure* on_peer_checked) {
   if (sc == nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked,
+    GRPC_CLOSURE_SCHED(on_peer_checked,
                        GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                            "cannot check peer -- no security connector"));
     tsi_peer_destruct(&peer);
   } else {
-    sc->vtable->check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked);
+    sc->vtable->check_peer(sc, peer, auth_context, on_peer_checked);
   }
 }
 
@@ -169,26 +168,26 @@
 }
 
 bool grpc_channel_security_connector_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    const char* host, grpc_auth_context* auth_context,
-    grpc_closure* on_call_host_checked, grpc_error** error) {
+    grpc_channel_security_connector* sc, const char* host,
+    grpc_auth_context* auth_context, grpc_closure* on_call_host_checked,
+    grpc_error** error) {
   if (sc == nullptr || sc->check_call_host == nullptr) {
     *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "cannot check call host -- no security connector");
     return true;
   }
-  return sc->check_call_host(exec_ctx, sc, host, auth_context,
-                             on_call_host_checked, error);
+  return sc->check_call_host(sc, host, auth_context, on_call_host_checked,
+                             error);
 }
 
 void grpc_channel_security_connector_cancel_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    grpc_closure* on_call_host_checked, grpc_error* error) {
+    grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked,
+    grpc_error* error) {
   if (sc == nullptr || sc->cancel_check_call_host == nullptr) {
     GRPC_ERROR_UNREF(error);
     return;
   }
-  sc->cancel_check_call_host(exec_ctx, sc, on_call_host_checked, error);
+  sc->cancel_check_call_host(sc, on_call_host_checked, error);
 }
 
 #ifndef NDEBUG
@@ -205,15 +204,14 @@
 #else
 grpc_security_connector* grpc_security_connector_ref(
     grpc_security_connector* sc) {
-  if (sc == NULL) return NULL;
+  if (sc == nullptr) return nullptr;
 #endif
   gpr_ref(&sc->refcount);
   return sc;
 }
 
 #ifndef NDEBUG
-void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc,
+void grpc_security_connector_unref(grpc_security_connector* sc,
                                    const char* file, int line,
                                    const char* reason) {
   if (sc == nullptr) return;
@@ -224,15 +222,14 @@
             val, val - 1, reason);
   }
 #else
-void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc) {
-  if (sc == NULL) return;
+void grpc_security_connector_unref(grpc_security_connector* sc) {
+  if (sc == nullptr) return;
 #endif
-  if (gpr_unref(&sc->refcount)) sc->vtable->destroy(exec_ctx, sc);
+  if (gpr_unref(&sc->refcount)) sc->vtable->destroy(sc);
 }
 
-static void connector_arg_destroy(grpc_exec_ctx* exec_ctx, void* p) {
-  GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, (grpc_security_connector*)p,
+static void connector_arg_destroy(void* p) {
+  GRPC_SECURITY_CONNECTOR_UNREF((grpc_security_connector*)p,
                                 "connector_arg_destroy");
 }
 
@@ -309,20 +306,16 @@
   bool is_lb_channel;
 } grpc_fake_channel_security_connector;
 
-static void fake_channel_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_security_connector* sc) {
+static void fake_channel_destroy(grpc_security_connector* sc) {
   grpc_fake_channel_security_connector* c =
       (grpc_fake_channel_security_connector*)sc;
-  grpc_call_credentials_unref(exec_ctx, c->base.request_metadata_creds);
+  grpc_call_credentials_unref(c->base.request_metadata_creds);
   gpr_free(c->target);
   gpr_free(c->expected_targets);
   gpr_free(c);
 }
 
-static void fake_server_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_security_connector* sc) {
-  gpr_free(sc);
-}
+static void fake_server_destroy(grpc_security_connector* sc) { gpr_free(sc); }
 
 static bool fake_check_target(const char* target_type, const char* target,
                               const char* set_str) {
@@ -386,8 +379,7 @@
   if (!success) abort();
 }
 
-static void fake_check_peer(grpc_exec_ctx* exec_ctx,
-                            grpc_security_connector* sc, tsi_peer peer,
+static void fake_check_peer(grpc_security_connector* sc, tsi_peer peer,
                             grpc_auth_context** auth_context,
                             grpc_closure* on_peer_checked) {
   const char* prop_name;
@@ -419,25 +411,23 @@
       *auth_context, GRPC_TRANSPORT_SECURITY_TYPE_PROPERTY_NAME,
       GRPC_FAKE_TRANSPORT_SECURITY_TYPE);
 end:
-  GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked, error);
+  GRPC_CLOSURE_SCHED(on_peer_checked, error);
   tsi_peer_destruct(&peer);
 }
 
-static void fake_channel_check_peer(grpc_exec_ctx* exec_ctx,
-                                    grpc_security_connector* sc, tsi_peer peer,
+static void fake_channel_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                     grpc_auth_context** auth_context,
                                     grpc_closure* on_peer_checked) {
-  fake_check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked);
+  fake_check_peer(sc, peer, auth_context, on_peer_checked);
   grpc_fake_channel_security_connector* c =
       (grpc_fake_channel_security_connector*)sc;
   fake_secure_name_check(c->target, c->expected_targets, c->is_lb_channel);
 }
 
-static void fake_server_check_peer(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc, tsi_peer peer,
+static void fake_server_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                    grpc_auth_context** auth_context,
                                    grpc_closure* on_peer_checked) {
-  fake_check_peer(exec_ctx, sc, peer, auth_context, on_peer_checked);
+  fake_check_peer(sc, peer, auth_context, on_peer_checked);
 }
 
 static int fake_channel_cmp(grpc_security_connector* sc1,
@@ -466,8 +456,7 @@
       (grpc_server_security_connector*)sc2);
 }
 
-static bool fake_channel_check_call_host(grpc_exec_ctx* exec_ctx,
-                                         grpc_channel_security_connector* sc,
+static bool fake_channel_check_call_host(grpc_channel_security_connector* sc,
                                          const char* host,
                                          grpc_auth_context* auth_context,
                                          grpc_closure* on_call_host_checked,
@@ -476,29 +465,26 @@
 }
 
 static void fake_channel_cancel_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    grpc_closure* on_call_host_checked, grpc_error* error) {
+    grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
 static void fake_channel_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
+    grpc_channel_security_connector* sc,
     grpc_handshake_manager* handshake_mgr) {
   grpc_handshake_manager_add(
       handshake_mgr,
       grpc_security_handshaker_create(
-          exec_ctx, tsi_create_fake_handshaker(true /* is_client */),
-          &sc->base));
+          tsi_create_fake_handshaker(true /* is_client */), &sc->base));
 }
 
-static void fake_server_add_handshakers(grpc_exec_ctx* exec_ctx,
-                                        grpc_server_security_connector* sc,
+static void fake_server_add_handshakers(grpc_server_security_connector* sc,
                                         grpc_handshake_manager* handshake_mgr) {
   grpc_handshake_manager_add(
       handshake_mgr,
       grpc_security_handshaker_create(
-          exec_ctx, tsi_create_fake_handshaker(false /* is_client */),
-          &sc->base));
+          tsi_create_fake_handshaker(false /* is_client */), &sc->base));
 }
 
 static grpc_security_connector_vtable fake_channel_vtable = {
@@ -565,12 +551,11 @@
   return server_creds->certificate_config_fetcher.cb != nullptr;
 }
 
-static void ssl_channel_destroy(grpc_exec_ctx* exec_ctx,
-                                grpc_security_connector* sc) {
+static void ssl_channel_destroy(grpc_security_connector* sc) {
   grpc_ssl_channel_security_connector* c =
       (grpc_ssl_channel_security_connector*)sc;
-  grpc_channel_credentials_unref(exec_ctx, c->base.channel_creds);
-  grpc_call_credentials_unref(exec_ctx, c->base.request_metadata_creds);
+  grpc_channel_credentials_unref(c->base.channel_creds);
+  grpc_call_credentials_unref(c->base.request_metadata_creds);
   tsi_ssl_client_handshaker_factory_unref(c->client_handshaker_factory);
   c->client_handshaker_factory = nullptr;
   if (c->target_name != nullptr) gpr_free(c->target_name);
@@ -578,18 +563,16 @@
   gpr_free(sc);
 }
 
-static void ssl_server_destroy(grpc_exec_ctx* exec_ctx,
-                               grpc_security_connector* sc) {
+static void ssl_server_destroy(grpc_security_connector* sc) {
   grpc_ssl_server_security_connector* c =
       (grpc_ssl_server_security_connector*)sc;
-  grpc_server_credentials_unref(exec_ctx, c->base.server_creds);
+  grpc_server_credentials_unref(c->base.server_creds);
   tsi_ssl_server_handshaker_factory_unref(c->server_handshaker_factory);
   c->server_handshaker_factory = nullptr;
   gpr_free(sc);
 }
 
-static void ssl_channel_add_handshakers(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_security_connector* sc,
+static void ssl_channel_add_handshakers(grpc_channel_security_connector* sc,
                                         grpc_handshake_manager* handshake_mgr) {
   grpc_ssl_channel_security_connector* c =
       (grpc_ssl_channel_security_connector*)sc;
@@ -607,9 +590,8 @@
   }
   // Create handshakers.
   grpc_handshake_manager_add(
-      handshake_mgr,
-      grpc_security_handshaker_create(
-          exec_ctx, tsi_create_adapter_handshaker(tsi_hs), &sc->base));
+      handshake_mgr, grpc_security_handshaker_create(
+                         tsi_create_adapter_handshaker(tsi_hs), &sc->base));
 }
 
 static const char** fill_alpn_protocol_strings(size_t* num_alpn_protocols) {
@@ -701,8 +683,7 @@
   return status;
 }
 
-static void ssl_server_add_handshakers(grpc_exec_ctx* exec_ctx,
-                                       grpc_server_security_connector* sc,
+static void ssl_server_add_handshakers(grpc_server_security_connector* sc,
                                        grpc_handshake_manager* handshake_mgr) {
   grpc_ssl_server_security_connector* c =
       (grpc_ssl_server_security_connector*)sc;
@@ -718,9 +699,8 @@
   }
   // Create handshakers.
   grpc_handshake_manager_add(
-      handshake_mgr,
-      grpc_security_handshaker_create(
-          exec_ctx, tsi_create_adapter_handshaker(tsi_hs), &sc->base));
+      handshake_mgr, grpc_security_handshaker_create(
+                         tsi_create_adapter_handshaker(tsi_hs), &sc->base));
 }
 
 static int ssl_host_matches_name(const tsi_peer* peer, const char* peer_name) {
@@ -804,8 +784,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static void ssl_channel_check_peer(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* sc, tsi_peer peer,
+static void ssl_channel_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                    grpc_auth_context** auth_context,
                                    grpc_closure* on_peer_checked) {
   grpc_ssl_channel_security_connector* c =
@@ -815,17 +794,16 @@
                                          ? c->overridden_target_name
                                          : c->target_name,
                                      &peer, auth_context);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked, error);
+  GRPC_CLOSURE_SCHED(on_peer_checked, error);
   tsi_peer_destruct(&peer);
 }
 
-static void ssl_server_check_peer(grpc_exec_ctx* exec_ctx,
-                                  grpc_security_connector* sc, tsi_peer peer,
+static void ssl_server_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                   grpc_auth_context** auth_context,
                                   grpc_closure* on_peer_checked) {
   grpc_error* error = ssl_check_peer(sc, nullptr, &peer, auth_context);
   tsi_peer_destruct(&peer);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_peer_checked, error);
+  GRPC_CLOSURE_SCHED(on_peer_checked, error);
 }
 
 static int ssl_channel_cmp(grpc_security_connector* sc1,
@@ -895,8 +873,7 @@
   if (peer->properties != nullptr) gpr_free(peer->properties);
 }
 
-static bool ssl_channel_check_call_host(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_security_connector* sc,
+static bool ssl_channel_check_call_host(grpc_channel_security_connector* sc,
                                         const char* host,
                                         grpc_auth_context* auth_context,
                                         grpc_closure* on_call_host_checked,
@@ -922,8 +899,8 @@
 }
 
 static void ssl_channel_cancel_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    grpc_closure* on_call_host_checked, grpc_error* error) {
+    grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked,
+    grpc_error* error) {
   GRPC_ERROR_UNREF(error);
 }
 
@@ -990,7 +967,7 @@
 }
 
 grpc_security_status grpc_ssl_channel_security_connector_create(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* channel_creds,
+    grpc_channel_credentials* channel_creds,
     grpc_call_credentials* request_metadata_creds,
     const grpc_ssl_config* config, const char* target_name,
     const char* overridden_target_name, grpc_channel_security_connector** sc) {
@@ -1045,7 +1022,7 @@
   if (result != TSI_OK) {
     gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
             tsi_result_to_string(result));
-    ssl_channel_destroy(exec_ctx, &c->base.base);
+    ssl_channel_destroy(&c->base.base);
     *sc = nullptr;
     goto error;
   }
@@ -1073,8 +1050,7 @@
 }
 
 grpc_security_status grpc_ssl_server_security_connector_create(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* gsc,
-    grpc_server_security_connector** sc) {
+    grpc_server_credentials* gsc, grpc_server_security_connector** sc) {
   tsi_result result = TSI_OK;
   grpc_ssl_server_credentials* server_credentials =
       (grpc_ssl_server_credentials*)gsc;
@@ -1114,7 +1090,7 @@
   if (retval == GRPC_SECURITY_OK) {
     *sc = &c->base;
   } else {
-    if (c != nullptr) ssl_server_destroy(exec_ctx, &c->base.base);
+    if (c != nullptr) ssl_server_destroy(&c->base.base);
     if (sc != nullptr) *sc = nullptr;
   }
   return retval;
diff --git a/src/core/lib/security/transport/security_connector.h b/src/core/lib/security/transport/security_connector.h
index 03daba3..495821d 100644
--- a/src/core/lib/security/transport/security_connector.h
+++ b/src/core/lib/security/transport/security_connector.h
@@ -50,9 +50,9 @@
 #define GRPC_ARG_SECURITY_CONNECTOR "grpc.security_connector"
 
 typedef struct {
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_security_connector* sc);
-  void (*check_peer)(grpc_exec_ctx* exec_ctx, grpc_security_connector* sc,
-                     tsi_peer peer, grpc_auth_context** auth_context,
+  void (*destroy)(grpc_security_connector* sc);
+  void (*check_peer)(grpc_security_connector* sc, tsi_peer peer,
+                     grpc_auth_context** auth_context,
                      grpc_closure* on_peer_checked);
   int (*cmp)(grpc_security_connector* sc, grpc_security_connector* other);
 } grpc_security_connector_vtable;
@@ -67,29 +67,25 @@
 #ifndef NDEBUG
 #define GRPC_SECURITY_CONNECTOR_REF(p, r) \
   grpc_security_connector_ref((p), __FILE__, __LINE__, (r))
-#define GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, p, r) \
-  grpc_security_connector_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
+#define GRPC_SECURITY_CONNECTOR_UNREF(p, r) \
+  grpc_security_connector_unref((p), __FILE__, __LINE__, (r))
 grpc_security_connector* grpc_security_connector_ref(
     grpc_security_connector* policy, const char* file, int line,
     const char* reason);
-void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* policy,
+void grpc_security_connector_unref(grpc_security_connector* policy,
                                    const char* file, int line,
                                    const char* reason);
 #else
 #define GRPC_SECURITY_CONNECTOR_REF(p, r) grpc_security_connector_ref((p))
-#define GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, p, r) \
-  grpc_security_connector_unref((exec_ctx), (p))
+#define GRPC_SECURITY_CONNECTOR_UNREF(p, r) grpc_security_connector_unref((p))
 grpc_security_connector* grpc_security_connector_ref(
     grpc_security_connector* policy);
-void grpc_security_connector_unref(grpc_exec_ctx* exec_ctx,
-                                   grpc_security_connector* policy);
+void grpc_security_connector_unref(grpc_security_connector* policy);
 #endif
 
 /* Check the peer. Callee takes ownership of the peer object.
    When done, sets *auth_context and invokes on_peer_checked. */
-void grpc_security_connector_check_peer(grpc_exec_ctx* exec_ctx,
-                                        grpc_security_connector* sc,
+void grpc_security_connector_check_peer(grpc_security_connector* sc,
                                         tsi_peer peer,
                                         grpc_auth_context** auth_context,
                                         grpc_closure* on_peer_checked);
@@ -119,17 +115,14 @@
   grpc_security_connector base;
   grpc_channel_credentials* channel_creds;
   grpc_call_credentials* request_metadata_creds;
-  bool (*check_call_host)(grpc_exec_ctx* exec_ctx,
-                          grpc_channel_security_connector* sc, const char* host,
+  bool (*check_call_host)(grpc_channel_security_connector* sc, const char* host,
                           grpc_auth_context* auth_context,
                           grpc_closure* on_call_host_checked,
                           grpc_error** error);
-  void (*cancel_check_call_host)(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_security_connector* sc,
+  void (*cancel_check_call_host)(grpc_channel_security_connector* sc,
                                  grpc_closure* on_call_host_checked,
                                  grpc_error* error);
-  void (*add_handshakers)(grpc_exec_ctx* exec_ctx,
-                          grpc_channel_security_connector* sc,
+  void (*add_handshakers)(grpc_channel_security_connector* sc,
                           grpc_handshake_manager* handshake_mgr);
 };
 
@@ -142,20 +135,20 @@
 /// be set to indicate the result.  Otherwise, \a on_call_host_checked
 /// will be invoked when complete.
 bool grpc_channel_security_connector_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    const char* host, grpc_auth_context* auth_context,
-    grpc_closure* on_call_host_checked, grpc_error** error);
+    grpc_channel_security_connector* sc, const char* host,
+    grpc_auth_context* auth_context, grpc_closure* on_call_host_checked,
+    grpc_error** error);
 
 /// Cancels a pending asychronous call to
 /// grpc_channel_security_connector_check_call_host() with
 /// \a on_call_host_checked as its callback.
 void grpc_channel_security_connector_cancel_check_call_host(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* sc,
-    grpc_closure* on_call_host_checked, grpc_error* error);
+    grpc_channel_security_connector* sc, grpc_closure* on_call_host_checked,
+    grpc_error* error);
 
 /* Registers handshakers with \a handshake_mgr. */
 void grpc_channel_security_connector_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_channel_security_connector* connector,
+    grpc_channel_security_connector* connector,
     grpc_handshake_manager* handshake_mgr);
 
 /* --- server_security_connector object. ---
@@ -168,8 +161,7 @@
 struct grpc_server_security_connector {
   grpc_security_connector base;
   grpc_server_credentials* server_creds;
-  void (*add_handshakers)(grpc_exec_ctx* exec_ctx,
-                          grpc_server_security_connector* sc,
+  void (*add_handshakers)(grpc_server_security_connector* sc,
                           grpc_handshake_manager* handshake_mgr);
 };
 
@@ -178,8 +170,7 @@
                                        grpc_server_security_connector* sc2);
 
 void grpc_server_security_connector_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_server_security_connector* sc,
-    grpc_handshake_manager* handshake_mgr);
+    grpc_server_security_connector* sc, grpc_handshake_manager* handshake_mgr);
 
 /* --- Creation security connectors. --- */
 
@@ -216,7 +207,7 @@
   specific error code otherwise.
 */
 grpc_security_status grpc_ssl_channel_security_connector_create(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* channel_creds,
+    grpc_channel_credentials* channel_creds,
     grpc_call_credentials* request_metadata_creds,
     const grpc_ssl_config* config, const char* target_name,
     const char* overridden_target_name, grpc_channel_security_connector** sc);
@@ -242,7 +233,7 @@
   specific error code otherwise.
 */
 grpc_security_status grpc_ssl_server_security_connector_create(
-    grpc_exec_ctx* exec_ctx, grpc_server_credentials* server_credentials,
+    grpc_server_credentials* server_credentials,
     grpc_server_security_connector** sc);
 
 /* Util. */
diff --git a/src/core/lib/security/transport/security_handshaker.cc b/src/core/lib/security/transport/security_handshaker.cc
index 7067b70..7623fbf 100644
--- a/src/core/lib/security/transport/security_handshaker.cc
+++ b/src/core/lib/security/transport/security_handshaker.cc
@@ -65,8 +65,7 @@
   tsi_handshaker_result* handshaker_result;
 } security_handshaker;
 
-static size_t move_read_buffer_into_handshake_buffer(grpc_exec_ctx* exec_ctx,
-                                                     security_handshaker* h) {
+static size_t move_read_buffer_into_handshake_buffer(security_handshaker* h) {
   size_t bytes_in_read_buffer = h->args->read_buffer->length;
   if (h->handshake_buffer_size < bytes_in_read_buffer) {
     h->handshake_buffer =
@@ -79,48 +78,45 @@
     memcpy(h->handshake_buffer + offset, GRPC_SLICE_START_PTR(next_slice),
            GRPC_SLICE_LENGTH(next_slice));
     offset += GRPC_SLICE_LENGTH(next_slice);
-    grpc_slice_unref_internal(exec_ctx, next_slice);
+    grpc_slice_unref_internal(next_slice);
   }
   return bytes_in_read_buffer;
 }
 
-static void security_handshaker_unref(grpc_exec_ctx* exec_ctx,
-                                      security_handshaker* h) {
+static void security_handshaker_unref(security_handshaker* h) {
   if (gpr_unref(&h->refs)) {
     gpr_mu_destroy(&h->mu);
     tsi_handshaker_destroy(h->handshaker);
     tsi_handshaker_result_destroy(h->handshaker_result);
     if (h->endpoint_to_destroy != nullptr) {
-      grpc_endpoint_destroy(exec_ctx, h->endpoint_to_destroy);
+      grpc_endpoint_destroy(h->endpoint_to_destroy);
     }
     if (h->read_buffer_to_destroy != nullptr) {
-      grpc_slice_buffer_destroy_internal(exec_ctx, h->read_buffer_to_destroy);
+      grpc_slice_buffer_destroy_internal(h->read_buffer_to_destroy);
       gpr_free(h->read_buffer_to_destroy);
     }
     gpr_free(h->handshake_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &h->outgoing);
+    grpc_slice_buffer_destroy_internal(&h->outgoing);
     GRPC_AUTH_CONTEXT_UNREF(h->auth_context, "handshake");
-    GRPC_SECURITY_CONNECTOR_UNREF(exec_ctx, h->connector, "handshake");
+    GRPC_SECURITY_CONNECTOR_UNREF(h->connector, "handshake");
     gpr_free(h);
   }
 }
 
 // Set args fields to NULL, saving the endpoint and read buffer for
 // later destruction.
-static void cleanup_args_for_failure_locked(grpc_exec_ctx* exec_ctx,
-                                            security_handshaker* h) {
+static void cleanup_args_for_failure_locked(security_handshaker* h) {
   h->endpoint_to_destroy = h->args->endpoint;
   h->args->endpoint = nullptr;
   h->read_buffer_to_destroy = h->args->read_buffer;
   h->args->read_buffer = nullptr;
-  grpc_channel_args_destroy(exec_ctx, h->args->args);
+  grpc_channel_args_destroy(h->args->args);
   h->args->args = nullptr;
 }
 
 // If the handshake failed or we're shutting down, clean up and invoke the
 // callback with the error.
-static void security_handshake_failed_locked(grpc_exec_ctx* exec_ctx,
-                                             security_handshaker* h,
+static void security_handshake_failed_locked(security_handshaker* h,
                                              grpc_error* error) {
   if (error == GRPC_ERROR_NONE) {
     // If we were shut down after the handshake succeeded but before an
@@ -135,34 +131,33 @@
     // before destroying them, even if we know that there are no
     // pending read/write callbacks.  This should be fixed, at which
     // point this can be removed.
-    grpc_endpoint_shutdown(exec_ctx, h->args->endpoint, GRPC_ERROR_REF(error));
+    grpc_endpoint_shutdown(h->args->endpoint, GRPC_ERROR_REF(error));
     // Not shutting down, so the write failed.  Clean up before
     // invoking the callback.
-    cleanup_args_for_failure_locked(exec_ctx, h);
+    cleanup_args_for_failure_locked(h);
     // Set shutdown to true so that subsequent calls to
     // security_handshaker_shutdown() do nothing.
     h->shutdown = true;
   }
   // Invoke callback.
-  GRPC_CLOSURE_SCHED(exec_ctx, h->on_handshake_done, error);
+  GRPC_CLOSURE_SCHED(h->on_handshake_done, error);
 }
 
-static void on_peer_checked_inner(grpc_exec_ctx* exec_ctx,
-                                  security_handshaker* h, grpc_error* error) {
+static void on_peer_checked_inner(security_handshaker* h, grpc_error* error) {
   if (error != GRPC_ERROR_NONE || h->shutdown) {
-    security_handshake_failed_locked(exec_ctx, h, GRPC_ERROR_REF(error));
+    security_handshake_failed_locked(h, GRPC_ERROR_REF(error));
     return;
   }
   // Create zero-copy frame protector, if implemented.
   tsi_zero_copy_grpc_protector* zero_copy_protector = nullptr;
   tsi_result result = tsi_handshaker_result_create_zero_copy_grpc_protector(
-      exec_ctx, h->handshaker_result, nullptr, &zero_copy_protector);
+      h->handshaker_result, nullptr, &zero_copy_protector);
   if (result != TSI_OK && result != TSI_UNIMPLEMENTED) {
     error = grpc_set_tsi_error_result(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             "Zero-copy frame protector creation failed"),
         result);
-    security_handshake_failed_locked(exec_ctx, h, error);
+    security_handshake_failed_locked(h, error);
     return;
   }
   // Create frame protector if zero-copy frame protector is NULL.
@@ -174,7 +169,7 @@
       error = grpc_set_tsi_error_result(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                             "Frame protector creation failed"),
                                         result);
-      security_handshake_failed_locked(exec_ctx, h, error);
+      security_handshake_failed_locked(h, error);
       return;
     }
   }
@@ -189,7 +184,7 @@
         grpc_slice_from_copied_buffer((char*)unused_bytes, unused_bytes_size);
     h->args->endpoint = grpc_secure_endpoint_create(
         protector, zero_copy_protector, h->args->endpoint, &slice, 1);
-    grpc_slice_unref_internal(exec_ctx, slice);
+    grpc_slice_unref_internal(slice);
   } else {
     h->args->endpoint = grpc_secure_endpoint_create(
         protector, zero_copy_protector, h->args->endpoint, nullptr, 0);
@@ -201,25 +196,23 @@
   grpc_channel_args* tmp_args = h->args->args;
   h->args->args =
       grpc_channel_args_copy_and_add(tmp_args, &auth_context_arg, 1);
-  grpc_channel_args_destroy(exec_ctx, tmp_args);
+  grpc_channel_args_destroy(tmp_args);
   // Invoke callback.
-  GRPC_CLOSURE_SCHED(exec_ctx, h->on_handshake_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(h->on_handshake_done, GRPC_ERROR_NONE);
   // Set shutdown to true so that subsequent calls to
   // security_handshaker_shutdown() do nothing.
   h->shutdown = true;
 }
 
-static void on_peer_checked(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void on_peer_checked(void* arg, grpc_error* error) {
   security_handshaker* h = (security_handshaker*)arg;
   gpr_mu_lock(&h->mu);
-  on_peer_checked_inner(exec_ctx, h, error);
+  on_peer_checked_inner(h, error);
   gpr_mu_unlock(&h->mu);
-  security_handshaker_unref(exec_ctx, h);
+  security_handshaker_unref(h);
 }
 
-static grpc_error* check_peer_locked(grpc_exec_ctx* exec_ctx,
-                                     security_handshaker* h) {
+static grpc_error* check_peer_locked(security_handshaker* h) {
   tsi_peer peer;
   tsi_result result =
       tsi_handshaker_result_extract_peer(h->handshaker_result, &peer);
@@ -227,20 +220,20 @@
     return grpc_set_tsi_error_result(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Peer extraction failed"), result);
   }
-  grpc_security_connector_check_peer(exec_ctx, h->connector, peer,
-                                     &h->auth_context, &h->on_peer_checked);
+  grpc_security_connector_check_peer(h->connector, peer, &h->auth_context,
+                                     &h->on_peer_checked);
   return GRPC_ERROR_NONE;
 }
 
 static grpc_error* on_handshake_next_done_locked(
-    grpc_exec_ctx* exec_ctx, security_handshaker* h, tsi_result result,
+    security_handshaker* h, tsi_result result,
     const unsigned char* bytes_to_send, size_t bytes_to_send_size,
     tsi_handshaker_result* handshaker_result) {
   grpc_error* error = GRPC_ERROR_NONE;
   // Read more if we need to.
   if (result == TSI_INCOMPLETE_DATA) {
     GPR_ASSERT(bytes_to_send_size == 0);
-    grpc_endpoint_read(exec_ctx, h->args->endpoint, h->args->read_buffer,
+    grpc_endpoint_read(h->args->endpoint, h->args->read_buffer,
                        &h->on_handshake_data_received_from_peer);
     return error;
   }
@@ -257,17 +250,17 @@
     // Send data to peer, if needed.
     grpc_slice to_send = grpc_slice_from_copied_buffer(
         (const char*)bytes_to_send, bytes_to_send_size);
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &h->outgoing);
+    grpc_slice_buffer_reset_and_unref_internal(&h->outgoing);
     grpc_slice_buffer_add(&h->outgoing, to_send);
-    grpc_endpoint_write(exec_ctx, h->args->endpoint, &h->outgoing,
+    grpc_endpoint_write(h->args->endpoint, &h->outgoing,
                         &h->on_handshake_data_sent_to_peer);
   } else if (handshaker_result == nullptr) {
     // There is nothing to send, but need to read from peer.
-    grpc_endpoint_read(exec_ctx, h->args->endpoint, h->args->read_buffer,
+    grpc_endpoint_read(h->args->endpoint, h->args->read_buffer,
                        &h->on_handshake_data_received_from_peer);
   } else {
     // Handshake has finished, check peer and so on.
-    error = check_peer_locked(exec_ctx, h);
+    error = check_peer_locked(h);
   }
   return error;
 }
@@ -278,24 +271,22 @@
   security_handshaker* h = (security_handshaker*)user_data;
   // This callback will be invoked by TSI in a non-grpc thread, so it's
   // safe to create our own exec_ctx here.
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_mu_lock(&h->mu);
-  grpc_error* error =
-      on_handshake_next_done_locked(&exec_ctx, h, result, bytes_to_send,
-                                    bytes_to_send_size, handshaker_result);
+  grpc_error* error = on_handshake_next_done_locked(
+      h, result, bytes_to_send, bytes_to_send_size, handshaker_result);
   if (error != GRPC_ERROR_NONE) {
-    security_handshake_failed_locked(&exec_ctx, h, error);
+    security_handshake_failed_locked(h, error);
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(&exec_ctx, h);
+    security_handshaker_unref(h);
   } else {
     gpr_mu_unlock(&h->mu);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static grpc_error* do_handshaker_next_locked(
-    grpc_exec_ctx* exec_ctx, security_handshaker* h,
-    const unsigned char* bytes_received, size_t bytes_received_size) {
+    security_handshaker* h, const unsigned char* bytes_received,
+    size_t bytes_received_size) {
   // Invoke TSI handshaker.
   const unsigned char* bytes_to_send = nullptr;
   size_t bytes_to_send_size = 0;
@@ -311,62 +302,57 @@
   }
   // Handshaker returned synchronously. Invoke callback directly in
   // this thread with our existing exec_ctx.
-  return on_handshake_next_done_locked(exec_ctx, h, result, bytes_to_send,
+  return on_handshake_next_done_locked(h, result, bytes_to_send,
                                        bytes_to_send_size, handshaker_result);
 }
 
-static void on_handshake_data_received_from_peer(grpc_exec_ctx* exec_ctx,
-                                                 void* arg, grpc_error* error) {
+static void on_handshake_data_received_from_peer(void* arg, grpc_error* error) {
   security_handshaker* h = (security_handshaker*)arg;
   gpr_mu_lock(&h->mu);
   if (error != GRPC_ERROR_NONE || h->shutdown) {
     security_handshake_failed_locked(
-        exec_ctx, h,
-        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-            "Handshake read failed", &error, 1));
+        h, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+               "Handshake read failed", &error, 1));
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(exec_ctx, h);
+    security_handshaker_unref(h);
     return;
   }
   // Copy all slices received.
-  size_t bytes_received_size =
-      move_read_buffer_into_handshake_buffer(exec_ctx, h);
+  size_t bytes_received_size = move_read_buffer_into_handshake_buffer(h);
   // Call TSI handshaker.
-  error = do_handshaker_next_locked(exec_ctx, h, h->handshake_buffer,
-                                    bytes_received_size);
+  error =
+      do_handshaker_next_locked(h, h->handshake_buffer, bytes_received_size);
 
   if (error != GRPC_ERROR_NONE) {
-    security_handshake_failed_locked(exec_ctx, h, error);
+    security_handshake_failed_locked(h, error);
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(exec_ctx, h);
+    security_handshaker_unref(h);
   } else {
     gpr_mu_unlock(&h->mu);
   }
 }
 
-static void on_handshake_data_sent_to_peer(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* error) {
+static void on_handshake_data_sent_to_peer(void* arg, grpc_error* error) {
   security_handshaker* h = (security_handshaker*)arg;
   gpr_mu_lock(&h->mu);
   if (error != GRPC_ERROR_NONE || h->shutdown) {
     security_handshake_failed_locked(
-        exec_ctx, h,
-        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-            "Handshake write failed", &error, 1));
+        h, GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+               "Handshake write failed", &error, 1));
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(exec_ctx, h);
+    security_handshaker_unref(h);
     return;
   }
   // We may be done.
   if (h->handshaker_result == nullptr) {
-    grpc_endpoint_read(exec_ctx, h->args->endpoint, h->args->read_buffer,
+    grpc_endpoint_read(h->args->endpoint, h->args->read_buffer,
                        &h->on_handshake_data_received_from_peer);
   } else {
-    error = check_peer_locked(exec_ctx, h);
+    error = check_peer_locked(h);
     if (error != GRPC_ERROR_NONE) {
-      security_handshake_failed_locked(exec_ctx, h, error);
+      security_handshake_failed_locked(h, error);
       gpr_mu_unlock(&h->mu);
-      security_handshaker_unref(exec_ctx, h);
+      security_handshaker_unref(h);
       return;
     }
   }
@@ -377,28 +363,25 @@
 // public handshaker API
 //
 
-static void security_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_handshaker* handshaker) {
+static void security_handshaker_destroy(grpc_handshaker* handshaker) {
   security_handshaker* h = (security_handshaker*)handshaker;
-  security_handshaker_unref(exec_ctx, h);
+  security_handshaker_unref(h);
 }
 
-static void security_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                                         grpc_handshaker* handshaker,
+static void security_handshaker_shutdown(grpc_handshaker* handshaker,
                                          grpc_error* why) {
   security_handshaker* h = (security_handshaker*)handshaker;
   gpr_mu_lock(&h->mu);
   if (!h->shutdown) {
     h->shutdown = true;
-    grpc_endpoint_shutdown(exec_ctx, h->args->endpoint, GRPC_ERROR_REF(why));
-    cleanup_args_for_failure_locked(exec_ctx, h);
+    grpc_endpoint_shutdown(h->args->endpoint, GRPC_ERROR_REF(why));
+    cleanup_args_for_failure_locked(h);
   }
   gpr_mu_unlock(&h->mu);
   GRPC_ERROR_UNREF(why);
 }
 
-static void security_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
-                                             grpc_handshaker* handshaker,
+static void security_handshaker_do_handshake(grpc_handshaker* handshaker,
                                              grpc_tcp_server_acceptor* acceptor,
                                              grpc_closure* on_handshake_done,
                                              grpc_handshaker_args* args) {
@@ -407,14 +390,13 @@
   h->args = args;
   h->on_handshake_done = on_handshake_done;
   gpr_ref(&h->refs);
-  size_t bytes_received_size =
-      move_read_buffer_into_handshake_buffer(exec_ctx, h);
-  grpc_error* error = do_handshaker_next_locked(
-      exec_ctx, h, h->handshake_buffer, bytes_received_size);
+  size_t bytes_received_size = move_read_buffer_into_handshake_buffer(h);
+  grpc_error* error =
+      do_handshaker_next_locked(h, h->handshake_buffer, bytes_received_size);
   if (error != GRPC_ERROR_NONE) {
-    security_handshake_failed_locked(exec_ctx, h, error);
+    security_handshake_failed_locked(h, error);
     gpr_mu_unlock(&h->mu);
-    security_handshaker_unref(exec_ctx, h);
+    security_handshaker_unref(h);
     return;
   }
   gpr_mu_unlock(&h->mu);
@@ -425,8 +407,7 @@
     security_handshaker_do_handshake};
 
 static grpc_handshaker* security_handshaker_create(
-    grpc_exec_ctx* exec_ctx, tsi_handshaker* handshaker,
-    grpc_security_connector* connector) {
+    tsi_handshaker* handshaker, grpc_security_connector* connector) {
   security_handshaker* h =
       (security_handshaker*)gpr_zalloc(sizeof(security_handshaker));
   grpc_handshaker_init(&security_handshaker_vtable, &h->base);
@@ -452,23 +433,20 @@
 // fail_handshaker
 //
 
-static void fail_handshaker_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_handshaker* handshaker) {
+static void fail_handshaker_destroy(grpc_handshaker* handshaker) {
   gpr_free(handshaker);
 }
 
-static void fail_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
-                                     grpc_handshaker* handshaker,
+static void fail_handshaker_shutdown(grpc_handshaker* handshaker,
                                      grpc_error* why) {
   GRPC_ERROR_UNREF(why);
 }
 
-static void fail_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
-                                         grpc_handshaker* handshaker,
+static void fail_handshaker_do_handshake(grpc_handshaker* handshaker,
                                          grpc_tcp_server_acceptor* acceptor,
                                          grpc_closure* on_handshake_done,
                                          grpc_handshaker_args* args) {
-  GRPC_CLOSURE_SCHED(exec_ctx, on_handshake_done,
+  GRPC_CLOSURE_SCHED(on_handshake_done,
                      GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                          "Failed to create security handshaker"));
 }
@@ -488,27 +466,27 @@
 //
 
 static void client_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory* handshaker_factory, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   grpc_channel_security_connector* security_connector =
       (grpc_channel_security_connector*)grpc_security_connector_find_in_args(
           args);
-  grpc_channel_security_connector_add_handshakers(exec_ctx, security_connector,
+  grpc_channel_security_connector_add_handshakers(security_connector,
                                                   handshake_mgr);
 }
 
 static void server_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* hf,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
+    grpc_handshaker_factory* hf, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
   grpc_server_security_connector* security_connector =
       (grpc_server_security_connector*)grpc_security_connector_find_in_args(
           args);
-  grpc_server_security_connector_add_handshakers(exec_ctx, security_connector,
+  grpc_server_security_connector_add_handshakers(security_connector,
                                                  handshake_mgr);
 }
 
 static void handshaker_factory_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory) {}
+    grpc_handshaker_factory* handshaker_factory) {}
 
 static const grpc_handshaker_factory_vtable client_handshaker_factory_vtable = {
     client_handshaker_factory_add_handshakers, handshaker_factory_destroy};
@@ -527,14 +505,13 @@
 //
 
 grpc_handshaker* grpc_security_handshaker_create(
-    grpc_exec_ctx* exec_ctx, tsi_handshaker* handshaker,
-    grpc_security_connector* connector) {
+    tsi_handshaker* handshaker, grpc_security_connector* connector) {
   // If no TSI handshaker was created, return a handshaker that always fails.
   // Otherwise, return a real security handshaker.
   if (handshaker == nullptr) {
     return fail_handshaker_create();
   } else {
-    return security_handshaker_create(exec_ctx, handshaker, connector);
+    return security_handshaker_create(handshaker, connector);
   }
 }
 
diff --git a/src/core/lib/security/transport/security_handshaker.h b/src/core/lib/security/transport/security_handshaker.h
index 6c3a051..6cd6446 100644
--- a/src/core/lib/security/transport/security_handshaker.h
+++ b/src/core/lib/security/transport/security_handshaker.h
@@ -25,8 +25,7 @@
 
 /// Creates a security handshaker using \a handshaker.
 grpc_handshaker* grpc_security_handshaker_create(
-    grpc_exec_ctx* exec_ctx, tsi_handshaker* handshaker,
-    grpc_security_connector* connector);
+    tsi_handshaker* handshaker, grpc_security_connector* connector);
 
 /// Registers security handshaker factories.
 void grpc_security_register_handshaker_factories();
diff --git a/src/core/lib/security/transport/server_auth_filter.cc b/src/core/lib/security/transport/server_auth_filter.cc
index 9cf368a..73653f2 100644
--- a/src/core/lib/security/transport/server_auth_filter.cc
+++ b/src/core/lib/security/transport/server_auth_filter.cc
@@ -73,8 +73,7 @@
   return result;
 }
 
-static grpc_filtered_mdelem remove_consumed_md(grpc_exec_ctx* exec_ctx,
-                                               void* user_data,
+static grpc_filtered_mdelem remove_consumed_md(void* user_data,
                                                grpc_mdelem md) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -88,8 +87,7 @@
   return GRPC_FILTERED_MDELEM(md);
 }
 
-static void on_md_processing_done_inner(grpc_exec_ctx* exec_ctx,
-                                        grpc_call_element* elem,
+static void on_md_processing_done_inner(grpc_call_element* elem,
                                         const grpc_metadata* consumed_md,
                                         size_t num_consumed_md,
                                         const grpc_metadata* response_md,
@@ -107,11 +105,10 @@
     calld->consumed_md = consumed_md;
     calld->num_consumed_md = num_consumed_md;
     error = grpc_metadata_batch_filter(
-        exec_ctx, batch->payload->recv_initial_metadata.recv_initial_metadata,
+        batch->payload->recv_initial_metadata.recv_initial_metadata,
         remove_consumed_md, elem, "Response metadata filtering error");
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, calld->original_recv_initial_metadata_ready,
-                     error);
+  GRPC_CLOSURE_SCHED(calld->original_recv_initial_metadata_ready, error);
 }
 
 // Called from application code.
@@ -121,7 +118,7 @@
     grpc_status_code status, const char* error_details) {
   grpc_call_element* elem = (grpc_call_element*)user_data;
   call_data* calld = (call_data*)elem->call_data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // If the call was not cancelled while we were in flight, process the result.
   if (gpr_atm_full_cas(&calld->state, (gpr_atm)STATE_INIT,
                        (gpr_atm)STATE_DONE)) {
@@ -134,34 +131,32 @@
           GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_details),
           GRPC_ERROR_INT_GRPC_STATUS, status);
     }
-    on_md_processing_done_inner(&exec_ctx, elem, consumed_md, num_consumed_md,
-                                response_md, num_response_md, error);
+    on_md_processing_done_inner(elem, consumed_md, num_consumed_md, response_md,
+                                num_response_md, error);
   }
   // Clean up.
   for (size_t i = 0; i < calld->md.count; i++) {
-    grpc_slice_unref_internal(&exec_ctx, calld->md.metadata[i].key);
-    grpc_slice_unref_internal(&exec_ctx, calld->md.metadata[i].value);
+    grpc_slice_unref_internal(calld->md.metadata[i].key);
+    grpc_slice_unref_internal(calld->md.metadata[i].value);
   }
   grpc_metadata_array_destroy(&calld->md);
-  GRPC_CALL_STACK_UNREF(&exec_ctx, calld->owning_call, "server_auth_metadata");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "server_auth_metadata");
 }
 
-static void cancel_call(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void cancel_call(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   // If the result was not already processed, invoke the callback now.
   if (error != GRPC_ERROR_NONE &&
       gpr_atm_full_cas(&calld->state, (gpr_atm)STATE_INIT,
                        (gpr_atm)STATE_CANCELLED)) {
-    on_md_processing_done_inner(exec_ctx, elem, nullptr, 0, nullptr, 0,
+    on_md_processing_done_inner(elem, nullptr, 0, nullptr, 0,
                                 GRPC_ERROR_REF(error));
   }
-  GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "cancel_call");
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "cancel_call");
 }
 
-static void recv_initial_metadata_ready(grpc_exec_ctx* exec_ctx, void* arg,
-                                        grpc_error* error) {
+static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
@@ -173,7 +168,7 @@
       GRPC_CALL_STACK_REF(calld->owning_call, "cancel_call");
       GRPC_CLOSURE_INIT(&calld->cancel_closure, cancel_call, elem,
                         grpc_schedule_on_exec_ctx);
-      grpc_call_combiner_set_notify_on_cancel(exec_ctx, calld->call_combiner,
+      grpc_call_combiner_set_notify_on_cancel(calld->call_combiner,
                                               &calld->cancel_closure);
       GRPC_CALL_STACK_REF(calld->owning_call, "server_auth_metadata");
       calld->md = metadata_batch_to_md_array(
@@ -184,13 +179,12 @@
       return;
     }
   }
-  GRPC_CLOSURE_RUN(exec_ctx, calld->original_recv_initial_metadata_ready,
+  GRPC_CLOSURE_RUN(calld->original_recv_initial_metadata_ready,
                    GRPC_ERROR_REF(error));
 }
 
 static void auth_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* batch) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   call_data* calld = (call_data*)elem->call_data;
   if (batch->recv_initial_metadata) {
     // Inject our callback.
@@ -200,12 +194,11 @@
     batch->payload->recv_initial_metadata.recv_initial_metadata_ready =
         &calld->recv_initial_metadata_ready;
   }
-  grpc_call_next_op(exec_ctx, elem, batch);
+  grpc_call_next_op(elem, batch);
 }
 
 /* Constructor for call_data */
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -231,13 +224,12 @@
 }
 
 /* Destructor for call_data */
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
 /* Constructor for channel_data */
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -253,11 +245,10 @@
 }
 
 /* Destructor for channel data */
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   GRPC_AUTH_CONTEXT_UNREF(chand->auth_context, "server_auth_filter");
-  grpc_server_credentials_unref(exec_ctx, chand->creds);
+  grpc_server_credentials_unref(chand->creds);
 }
 
 const grpc_channel_filter grpc_server_auth_filter = {
diff --git a/src/core/lib/slice/b64.cc b/src/core/lib/slice/b64.cc
index fe7a86e..f36b13e 100644
--- a/src/core/lib/slice/b64.cc
+++ b/src/core/lib/slice/b64.cc
@@ -122,9 +122,8 @@
   result[current - result] = '\0';
 }
 
-grpc_slice grpc_base64_decode(grpc_exec_ctx* exec_ctx, const char* b64,
-                              int url_safe) {
-  return grpc_base64_decode_with_len(exec_ctx, b64, strlen(b64), url_safe);
+grpc_slice grpc_base64_decode(const char* b64, int url_safe) {
+  return grpc_base64_decode_with_len(b64, strlen(b64), url_safe);
 }
 
 static void decode_one_char(const unsigned char* codes, unsigned char* result,
@@ -185,8 +184,8 @@
   return 1;
 }
 
-grpc_slice grpc_base64_decode_with_len(grpc_exec_ctx* exec_ctx, const char* b64,
-                                       size_t b64_len, int url_safe) {
+grpc_slice grpc_base64_decode_with_len(const char* b64, size_t b64_len,
+                                       int url_safe) {
   grpc_slice result = GRPC_SLICE_MALLOC(b64_len);
   unsigned char* current = GRPC_SLICE_START_PTR(result);
   size_t result_size = 0;
@@ -231,6 +230,6 @@
   return result;
 
 fail:
-  grpc_slice_unref_internal(exec_ctx, result);
+  grpc_slice_unref_internal(result);
   return grpc_empty_slice();
 }
diff --git a/src/core/lib/slice/b64.h b/src/core/lib/slice/b64.h
index f86c1d9..17e7306 100644
--- a/src/core/lib/slice/b64.h
+++ b/src/core/lib/slice/b64.h
@@ -40,11 +40,10 @@
 
 /* Decodes data according to the base64 specification. Returns an empty
    slice in case of failure. */
-grpc_slice grpc_base64_decode(grpc_exec_ctx* exec_ctx, const char* b64,
-                              int url_safe);
+grpc_slice grpc_base64_decode(const char* b64, int url_safe);
 
 /* Same as above except that the length is provided by the caller. */
-grpc_slice grpc_base64_decode_with_len(grpc_exec_ctx* exec_ctx, const char* b64,
-                                       size_t b64_len, int url_safe);
+grpc_slice grpc_base64_decode_with_len(const char* b64, size_t b64_len,
+                                       int url_safe);
 
 #endif /* GRPC_CORE_LIB_SLICE_B64_H */
diff --git a/src/core/lib/slice/slice.cc b/src/core/lib/slice/slice.cc
index bbaf87b..1eb1529 100644
--- a/src/core/lib/slice/slice.cc
+++ b/src/core/lib/slice/slice.cc
@@ -54,9 +54,9 @@
   return slice;
 }
 
-void grpc_slice_unref_internal(grpc_exec_ctx* exec_ctx, grpc_slice slice) {
+void grpc_slice_unref_internal(grpc_slice slice) {
   if (slice.refcount) {
-    slice.refcount->vtable->unref(exec_ctx, slice.refcount);
+    slice.refcount->vtable->unref(slice.refcount);
   }
 }
 
@@ -67,15 +67,14 @@
 
 /* Public API */
 void grpc_slice_unref(grpc_slice slice) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_unref_internal(&exec_ctx, slice);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_unref_internal(slice);
 }
 
 /* grpc_slice_from_static_string support structure - a refcount that does
    nothing */
 static void noop_ref(void* unused) {}
-static void noop_unref(grpc_exec_ctx* exec_ctx, void* unused) {}
+static void noop_unref(void* unused) {}
 
 static const grpc_slice_refcount_vtable noop_refcount_vtable = {
     noop_ref, noop_unref, grpc_slice_default_eq_impl,
@@ -109,7 +108,7 @@
   gpr_ref(&r->refs);
 }
 
-static void new_slice_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void new_slice_unref(void* p) {
   new_slice_refcount* r = (new_slice_refcount*)p;
   if (gpr_unref(&r->refs)) {
     r->user_destroy(r->user_data);
@@ -159,7 +158,7 @@
   gpr_ref(&r->refs);
 }
 
-static void new_with_len_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void new_with_len_unref(void* p) {
   new_with_len_slice_refcount* r = (new_with_len_slice_refcount*)p;
   if (gpr_unref(&r->refs)) {
     r->user_destroy(r->user_data, r->user_length);
@@ -210,7 +209,7 @@
   gpr_ref(&r->refs);
 }
 
-static void malloc_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void malloc_unref(void* p) {
   malloc_refcount* r = (malloc_refcount*)p;
   if (gpr_unref(&r->refs)) {
     gpr_free(r);
diff --git a/src/core/lib/slice/slice_buffer.cc b/src/core/lib/slice/slice_buffer.cc
index 5db54da..33ec2af 100644
--- a/src/core/lib/slice/slice_buffer.cc
+++ b/src/core/lib/slice/slice_buffer.cc
@@ -65,18 +65,16 @@
   sb->base_slices = sb->slices = sb->inlined;
 }
 
-void grpc_slice_buffer_destroy_internal(grpc_exec_ctx* exec_ctx,
-                                        grpc_slice_buffer* sb) {
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, sb);
+void grpc_slice_buffer_destroy_internal(grpc_slice_buffer* sb) {
+  grpc_slice_buffer_reset_and_unref_internal(sb);
   if (sb->base_slices != sb->inlined) {
     gpr_free(sb->base_slices);
   }
 }
 
 void grpc_slice_buffer_destroy(grpc_slice_buffer* sb) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_buffer_destroy_internal(&exec_ctx, sb);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_buffer_destroy_internal(sb);
 }
 
 uint8_t* grpc_slice_buffer_tiny_add(grpc_slice_buffer* sb, size_t n) {
@@ -163,11 +161,10 @@
   }
 }
 
-void grpc_slice_buffer_reset_and_unref_internal(grpc_exec_ctx* exec_ctx,
-                                                grpc_slice_buffer* sb) {
+void grpc_slice_buffer_reset_and_unref_internal(grpc_slice_buffer* sb) {
   size_t i;
   for (i = 0; i < sb->count; i++) {
-    grpc_slice_unref_internal(exec_ctx, sb->slices[i]);
+    grpc_slice_unref_internal(sb->slices[i]);
   }
 
   sb->count = 0;
@@ -175,9 +172,8 @@
 }
 
 void grpc_slice_buffer_reset_and_unref(grpc_slice_buffer* sb) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, sb);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_buffer_reset_and_unref_internal(sb);
 }
 
 void grpc_slice_buffer_swap(grpc_slice_buffer* a, grpc_slice_buffer* b) {
@@ -289,8 +285,7 @@
   slice_buffer_move_first_maybe_ref(src, n, dst, false);
 }
 
-void grpc_slice_buffer_move_first_into_buffer(grpc_exec_ctx* exec_ctx,
-                                              grpc_slice_buffer* src, size_t n,
+void grpc_slice_buffer_move_first_into_buffer(grpc_slice_buffer* src, size_t n,
                                               void* dst) {
   char* dstp = (char*)dst;
   GPR_ASSERT(src->length >= n);
@@ -305,13 +300,13 @@
       n = 0;
     } else if (slice_len == n) {
       memcpy(dstp, GRPC_SLICE_START_PTR(slice), n);
-      grpc_slice_unref_internal(exec_ctx, slice);
+      grpc_slice_unref_internal(slice);
       n = 0;
     } else {
       memcpy(dstp, GRPC_SLICE_START_PTR(slice), slice_len);
       dstp += slice_len;
       n -= slice_len;
-      grpc_slice_unref_internal(exec_ctx, slice);
+      grpc_slice_unref_internal(slice);
     }
   }
 }
diff --git a/src/core/lib/slice/slice_hash_table.cc b/src/core/lib/slice/slice_hash_table.cc
index 8f8e5a6..89340ef 100644
--- a/src/core/lib/slice/slice_hash_table.cc
+++ b/src/core/lib/slice/slice_hash_table.cc
@@ -27,7 +27,7 @@
 
 struct grpc_slice_hash_table {
   gpr_refcount refs;
-  void (*destroy_value)(grpc_exec_ctx* exec_ctx, void* value);
+  void (*destroy_value)(void* value);
   int (*value_cmp)(void* a, void* b);
   size_t size;
   size_t max_num_probes;
@@ -58,8 +58,7 @@
 
 grpc_slice_hash_table* grpc_slice_hash_table_create(
     size_t num_entries, grpc_slice_hash_table_entry* entries,
-    void (*destroy_value)(grpc_exec_ctx* exec_ctx, void* value),
-    int (*value_cmp)(void* a, void* b)) {
+    void (*destroy_value)(void* value), int (*value_cmp)(void* a, void* b)) {
   grpc_slice_hash_table* table =
       (grpc_slice_hash_table*)gpr_zalloc(sizeof(*table));
   gpr_ref_init(&table->refs, 1);
@@ -81,14 +80,13 @@
   return table;
 }
 
-void grpc_slice_hash_table_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_slice_hash_table* table) {
+void grpc_slice_hash_table_unref(grpc_slice_hash_table* table) {
   if (table != nullptr && gpr_unref(&table->refs)) {
     for (size_t i = 0; i < table->size; ++i) {
       grpc_slice_hash_table_entry* entry = &table->entries[i];
       if (!is_empty(entry)) {
-        grpc_slice_unref_internal(exec_ctx, entry->key);
-        table->destroy_value(exec_ctx, entry->value);
+        grpc_slice_unref_internal(entry->key);
+        table->destroy_value(entry->value);
       }
     }
     gpr_free(table->entries);
diff --git a/src/core/lib/slice/slice_hash_table.h b/src/core/lib/slice/slice_hash_table.h
index 85102bd..db69da6 100644
--- a/src/core/lib/slice/slice_hash_table.h
+++ b/src/core/lib/slice/slice_hash_table.h
@@ -46,12 +46,10 @@
     will be used. */
 grpc_slice_hash_table* grpc_slice_hash_table_create(
     size_t num_entries, grpc_slice_hash_table_entry* entries,
-    void (*destroy_value)(grpc_exec_ctx* exec_ctx, void* value),
-    int (*value_cmp)(void* a, void* b));
+    void (*destroy_value)(void* value), int (*value_cmp)(void* a, void* b));
 
 grpc_slice_hash_table* grpc_slice_hash_table_ref(grpc_slice_hash_table* table);
-void grpc_slice_hash_table_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_slice_hash_table* table);
+void grpc_slice_hash_table_unref(grpc_slice_hash_table* table);
 
 /** Returns the value from \a table associated with \a key.
     Returns NULL if \a key is not found. */
diff --git a/src/core/lib/slice/slice_intern.cc b/src/core/lib/slice/slice_intern.cc
index e894913..c578c6d 100644
--- a/src/core/lib/slice/slice_intern.cc
+++ b/src/core/lib/slice/slice_intern.cc
@@ -90,7 +90,7 @@
   gpr_mu_unlock(&shard->mu);
 }
 
-static void interned_slice_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void interned_slice_unref(void* p) {
   interned_slice_refcount* s = (interned_slice_refcount*)p;
   if (1 == gpr_atm_full_fetch_add(&s->refcnt, -1)) {
     interned_slice_destroy(s);
@@ -101,9 +101,8 @@
   interned_slice_ref(((char*)p) - offsetof(interned_slice_refcount, sub));
 }
 
-static void interned_slice_sub_unref(grpc_exec_ctx* exec_ctx, void* p) {
-  interned_slice_unref(exec_ctx,
-                       ((char*)p) - offsetof(interned_slice_refcount, sub));
+static void interned_slice_sub_unref(void* p) {
+  interned_slice_unref(((char*)p) - offsetof(interned_slice_refcount, sub));
 }
 
 static uint32_t interned_slice_hash(grpc_slice slice) {
diff --git a/src/core/lib/slice/slice_internal.h b/src/core/lib/slice/slice_internal.h
index ed0070d..4e9ab80 100644
--- a/src/core/lib/slice/slice_internal.h
+++ b/src/core/lib/slice/slice_internal.h
@@ -25,14 +25,11 @@
 #include "src/core/lib/iomgr/exec_ctx.h"
 
 grpc_slice grpc_slice_ref_internal(grpc_slice slice);
-void grpc_slice_unref_internal(grpc_exec_ctx* exec_ctx, grpc_slice slice);
-void grpc_slice_buffer_reset_and_unref_internal(grpc_exec_ctx* exec_ctx,
-                                                grpc_slice_buffer* sb);
-void grpc_slice_buffer_partial_unref_internal(grpc_exec_ctx* exec_ctx,
-                                              grpc_slice_buffer* sb,
+void grpc_slice_unref_internal(grpc_slice slice);
+void grpc_slice_buffer_reset_and_unref_internal(grpc_slice_buffer* sb);
+void grpc_slice_buffer_partial_unref_internal(grpc_slice_buffer* sb,
                                               size_t idx);
-void grpc_slice_buffer_destroy_internal(grpc_exec_ctx* exec_ctx,
-                                        grpc_slice_buffer* sb);
+void grpc_slice_buffer_destroy_internal(grpc_slice_buffer* sb);
 
 /* Check if a slice is interned */
 bool grpc_slice_is_interned(grpc_slice slice);
diff --git a/src/core/lib/support/thd_posix.cc b/src/core/lib/support/thd_posix.cc
index c2a4f41..f0ed48d 100644
--- a/src/core/lib/support/thd_posix.cc
+++ b/src/core/lib/support/thd_posix.cc
@@ -41,6 +41,7 @@
 struct thd_arg {
   void (*body)(void* arg); /* body of a thread */
   void* arg;               /* argument to a thread */
+  const char* name;        /* name of thread. Can be nullptr. */
 };
 
 static void inc_thd_count();
@@ -50,12 +51,26 @@
 static void* thread_body(void* v) {
   struct thd_arg a = *(struct thd_arg*)v;
   free(v);
+  if (a.name != nullptr) {
+#if GPR_APPLE_PTHREAD_NAME
+    /* Apple supports 64 characters, and will truncate if it's longer. */
+    pthread_setname_np(a.name);
+#elif GPR_LINUX_PTHREAD_NAME
+    /* Linux supports 16 characters max, and will error if it's longer. */
+    char buf[16];
+    size_t buf_len = GPR_ARRAY_SIZE(buf) - 1;
+    strncpy(buf, a.name, buf_len);
+    buf[buf_len] = '\0';
+    pthread_setname_np(pthread_self(), buf);
+#endif  // GPR_APPLE_PTHREAD_NAME
+  }
   (*a.body)(a.arg);
   dec_thd_count();
   return nullptr;
 }
 
-int gpr_thd_new(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg,
+int gpr_thd_new(gpr_thd_id* t, const char* thd_name,
+                void (*thd_body)(void* arg), void* arg,
                 const gpr_thd_options* options) {
   int thread_started;
   pthread_attr_t attr;
@@ -66,6 +81,7 @@
   GPR_ASSERT(a != nullptr);
   a->body = thd_body;
   a->arg = arg;
+  a->name = thd_name;
   inc_thd_count();
 
   GPR_ASSERT(pthread_attr_init(&attr) == 0);
diff --git a/src/core/lib/support/thd_windows.cc b/src/core/lib/support/thd_windows.cc
index 0875c2f..f920770 100644
--- a/src/core/lib/support/thd_windows.cc
+++ b/src/core/lib/support/thd_windows.cc
@@ -65,7 +65,8 @@
   return 0;
 }
 
-int gpr_thd_new(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg,
+int gpr_thd_new(gpr_thd_id* t, const char* thd_name,
+                void (*thd_body)(void* arg), void* arg,
                 const gpr_thd_options* options) {
   HANDLE handle;
   struct thd_info* info = (struct thd_info*)gpr_malloc(sizeof(*info));
diff --git a/src/core/lib/surface/alarm.cc b/src/core/lib/surface/alarm.cc
index b1c9f7b..f6ea016 100644
--- a/src/core/lib/surface/alarm.cc
+++ b/src/core/lib/surface/alarm.cc
@@ -45,11 +45,11 @@
 
 static void alarm_unref(grpc_alarm* alarm) {
   if (gpr_unref(&alarm->refs)) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     if (alarm->cq != nullptr) {
-      GRPC_CQ_INTERNAL_UNREF(&exec_ctx, alarm->cq, "alarm");
+      GRPC_CQ_INTERNAL_UNREF(alarm->cq, "alarm");
     }
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_free(alarm);
   }
 }
@@ -80,20 +80,19 @@
 }
 #endif
 
-static void alarm_end_completion(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_cq_completion* c) {
+static void alarm_end_completion(void* arg, grpc_cq_completion* c) {
   grpc_alarm* alarm = (grpc_alarm*)arg;
   GRPC_ALARM_UNREF(alarm, "dequeue-end-op");
 }
 
-static void alarm_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void alarm_cb(void* arg, grpc_error* error) {
   grpc_alarm* alarm = (grpc_alarm*)arg;
 
   /* We are queuing an op on completion queue. This means, the alarm's structure
      cannot be destroyed until the op is dequeued. Adding an extra ref
      here and unref'ing when the op is dequeued will achieve this */
   GRPC_ALARM_REF(alarm, "queue-end-op");
-  grpc_cq_end_op(exec_ctx, alarm->cq, alarm->tag, error, alarm_end_completion,
+  grpc_cq_end_op(alarm->cq, alarm->tag, error, alarm_end_completion,
                  (void*)alarm, &alarm->completion);
 }
 
@@ -116,22 +115,20 @@
 
 void grpc_alarm_set(grpc_alarm* alarm, grpc_completion_queue* cq,
                     gpr_timespec deadline, void* tag, void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_CQ_INTERNAL_REF(cq, "alarm");
   alarm->cq = cq;
   alarm->tag = tag;
 
   GPR_ASSERT(grpc_cq_begin_op(cq, tag));
-  grpc_timer_init(&exec_ctx, &alarm->alarm,
-                  grpc_timespec_to_millis_round_up(deadline), &alarm->on_alarm);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_init(&alarm->alarm, grpc_timespec_to_millis_round_up(deadline),
+                  &alarm->on_alarm);
 }
 
 void grpc_alarm_cancel(grpc_alarm* alarm, void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_timer_cancel(&exec_ctx, &alarm->alarm);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_timer_cancel(&alarm->alarm);
 }
 
 void grpc_alarm_destroy(grpc_alarm* alarm, void* reserved) {
diff --git a/src/core/lib/surface/byte_buffer.cc b/src/core/lib/surface/byte_buffer.cc
index 9e0636b..e4c2a4a 100644
--- a/src/core/lib/surface/byte_buffer.cc
+++ b/src/core/lib/surface/byte_buffer.cc
@@ -71,14 +71,13 @@
 
 void grpc_byte_buffer_destroy(grpc_byte_buffer* bb) {
   if (!bb) return;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   switch (bb->type) {
     case GRPC_BB_RAW:
-      grpc_slice_buffer_destroy_internal(&exec_ctx, &bb->data.raw.slice_buffer);
+      grpc_slice_buffer_destroy_internal(&bb->data.raw.slice_buffer);
       break;
   }
   gpr_free(bb);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 size_t grpc_byte_buffer_length(grpc_byte_buffer* bb) {
diff --git a/src/core/lib/surface/byte_buffer_reader.cc b/src/core/lib/surface/byte_buffer_reader.cc
index 001227a..81a48e9 100644
--- a/src/core/lib/surface/byte_buffer_reader.cc
+++ b/src/core/lib/surface/byte_buffer_reader.cc
@@ -42,15 +42,14 @@
 
 int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader* reader,
                                  grpc_byte_buffer* buffer) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_slice_buffer decompressed_slices_buffer;
   reader->buffer_in = buffer;
   switch (reader->buffer_in->type) {
     case GRPC_BB_RAW:
       grpc_slice_buffer_init(&decompressed_slices_buffer);
       if (is_compressed(reader->buffer_in)) {
-        if (grpc_msg_decompress(&exec_ctx,
-                                reader->buffer_in->data.raw.compression,
+        if (grpc_msg_decompress(reader->buffer_in->data.raw.compression,
                                 &reader->buffer_in->data.raw.slice_buffer,
                                 &decompressed_slices_buffer) == 0) {
           gpr_log(GPR_ERROR,
@@ -64,15 +63,14 @@
               grpc_raw_byte_buffer_create(decompressed_slices_buffer.slices,
                                           decompressed_slices_buffer.count);
         }
-        grpc_slice_buffer_destroy_internal(&exec_ctx,
-                                           &decompressed_slices_buffer);
+        grpc_slice_buffer_destroy_internal(&decompressed_slices_buffer);
       } else { /* not compressed, use the input buffer as output */
         reader->buffer_out = reader->buffer_in;
       }
       reader->current.index = 0;
       break;
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return 1;
 }
 
@@ -112,14 +110,14 @@
   grpc_slice out_slice = GRPC_SLICE_MALLOC(input_size);
   uint8_t* const outbuf = GRPC_SLICE_START_PTR(out_slice); /* just an alias */
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (grpc_byte_buffer_reader_next(reader, &in_slice) != 0) {
     const size_t slice_length = GRPC_SLICE_LENGTH(in_slice);
     memcpy(&(outbuf[bytes_read]), GRPC_SLICE_START_PTR(in_slice), slice_length);
     bytes_read += slice_length;
-    grpc_slice_unref_internal(&exec_ctx, in_slice);
+    grpc_slice_unref_internal(in_slice);
     GPR_ASSERT(bytes_read <= input_size);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return out_slice;
 }
diff --git a/src/core/lib/surface/call.cc b/src/core/lib/surface/call.cc
index a2eb02b..a457aaa 100644
--- a/src/core/lib/surface/call.cc
+++ b/src/core/lib/surface/call.cc
@@ -270,30 +270,25 @@
 #define CALL_FROM_TOP_ELEM(top_elem) \
   CALL_FROM_CALL_STACK(grpc_call_stack_from_top_element(top_elem))
 
-static void execute_batch(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                          grpc_transport_stream_op_batch* op,
+static void execute_batch(grpc_call* call, grpc_transport_stream_op_batch* op,
                           grpc_closure* start_batch_closure);
-static void cancel_with_status(grpc_exec_ctx* exec_ctx, grpc_call* c,
-                               status_source source, grpc_status_code status,
+static void cancel_with_status(grpc_call* c, status_source source,
+                               grpc_status_code status,
                                const char* description);
-static void cancel_with_error(grpc_exec_ctx* exec_ctx, grpc_call* c,
-                              status_source source, grpc_error* error);
-static void destroy_call(grpc_exec_ctx* exec_ctx, void* call_stack,
-                         grpc_error* error);
-static void receiving_slice_ready(grpc_exec_ctx* exec_ctx, void* bctlp,
-                                  grpc_error* error);
-static void get_final_status(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                             void (*set_value)(grpc_status_code code,
-                                               void* user_data),
-                             void* set_value_user_data, grpc_slice* details,
-                             const char** error_string);
+static void cancel_with_error(grpc_call* c, status_source source,
+                              grpc_error* error);
+static void destroy_call(void* call_stack, grpc_error* error);
+static void receiving_slice_ready(void* bctlp, grpc_error* error);
+static void get_final_status(
+    grpc_call* call, void (*set_value)(grpc_status_code code, void* user_data),
+    void* set_value_user_data, grpc_slice* details, const char** error_string);
 static void set_status_value_directly(grpc_status_code status, void* dest);
-static void set_status_from_error(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                                  status_source source, grpc_error* error);
-static void process_data_after_md(grpc_exec_ctx* exec_ctx, batch_control* bctl);
-static void post_batch_completion(grpc_exec_ctx* exec_ctx, batch_control* bctl);
-static void add_batch_error(grpc_exec_ctx* exec_ctx, batch_control* bctl,
-                            grpc_error* error, bool has_cancelled);
+static void set_status_from_error(grpc_call* call, status_source source,
+                                  grpc_error* error);
+static void process_data_after_md(batch_control* bctl);
+static void post_batch_completion(batch_control* bctl);
+static void add_batch_error(batch_control* bctl, grpc_error* error,
+                            bool has_cancelled);
 
 static void add_init_error(grpc_error** composite, grpc_error* new_err) {
   if (new_err == GRPC_ERROR_NONE) return;
@@ -311,7 +306,8 @@
   if (p == nullptr) {
     p = (parent_call*)gpr_arena_alloc(call->arena, sizeof(*p));
     gpr_mu_init(&p->child_list_mu);
-    if (!gpr_atm_rel_cas(&call->parent_call_atm, (gpr_atm)NULL, (gpr_atm)p)) {
+    if (!gpr_atm_rel_cas(&call->parent_call_atm, (gpr_atm) nullptr,
+                         (gpr_atm)p)) {
       gpr_mu_destroy(&p->child_list_mu);
       p = (parent_call*)gpr_atm_acq_load(&call->parent_call_atm);
     }
@@ -323,8 +319,7 @@
   return (parent_call*)gpr_atm_acq_load(&call->parent_call_atm);
 }
 
-grpc_error* grpc_call_create(grpc_exec_ctx* exec_ctx,
-                             const grpc_call_create_args* args,
+grpc_error* grpc_call_create(const grpc_call_create_args* args,
                              grpc_call** out_call) {
   size_t i, j;
   grpc_error* error = GRPC_ERROR_NONE;
@@ -333,7 +328,7 @@
   grpc_call* call;
   GPR_TIMER_BEGIN("grpc_call_create", 0);
   size_t initial_size = grpc_channel_get_call_size_estimate(args->channel);
-  GRPC_STATS_INC_CALL_INITIAL_SIZE(exec_ctx, initial_size);
+  GRPC_STATS_INC_CALL_INITIAL_SIZE(initial_size);
   gpr_arena* arena = gpr_arena_create(initial_size);
   call = (grpc_call*)gpr_arena_alloc(
       arena, sizeof(grpc_call) + channel_stack->call_stack_size);
@@ -348,9 +343,9 @@
   GPR_BITSET(&call->encodings_accepted_by_peer, GRPC_COMPRESS_NONE);
   call->is_client = args->server_transport_data == nullptr;
   if (call->is_client) {
-    GRPC_STATS_INC_CLIENT_CALLS_CREATED(exec_ctx);
+    GRPC_STATS_INC_CLIENT_CALLS_CREATED();
   } else {
-    GRPC_STATS_INC_SERVER_CALLS_CREATED(exec_ctx);
+    GRPC_STATS_INC_SERVER_CALLS_CREATED();
   }
   call->stream_op_payload.context = call->context;
   grpc_slice path = grpc_empty_slice();
@@ -445,15 +440,13 @@
                                       send_deadline,
                                       call->arena,
                                       &call->call_combiner};
-  add_init_error(&error, grpc_call_stack_init(exec_ctx, channel_stack, 1,
-                                              destroy_call, call, &call_args));
+  add_init_error(&error, grpc_call_stack_init(channel_stack, 1, destroy_call,
+                                              call, &call_args));
   if (error != GRPC_ERROR_NONE) {
-    cancel_with_error(exec_ctx, call, STATUS_FROM_SURFACE,
-                      GRPC_ERROR_REF(error));
+    cancel_with_error(call, STATUS_FROM_SURFACE, GRPC_ERROR_REF(error));
   }
   if (immediately_cancel) {
-    cancel_with_error(exec_ctx, call, STATUS_FROM_API_OVERRIDE,
-                      GRPC_ERROR_CANCELLED);
+    cancel_with_error(call, STATUS_FROM_API_OVERRIDE, GRPC_ERROR_CANCELLED);
   }
   if (args->cq != nullptr) {
     GPR_ASSERT(
@@ -468,17 +461,17 @@
         args->pollset_set_alternative);
   }
   if (!grpc_polling_entity_is_empty(&call->pollent)) {
-    grpc_call_stack_set_pollset_or_pollset_set(
-        exec_ctx, CALL_STACK_FROM_CALL(call), &call->pollent);
+    grpc_call_stack_set_pollset_or_pollset_set(CALL_STACK_FROM_CALL(call),
+                                               &call->pollent);
   }
 
-  grpc_slice_unref_internal(exec_ctx, path);
+  grpc_slice_unref_internal(path);
 
   GPR_TIMER_END("grpc_call_create", 0);
   return error;
 }
 
-void grpc_call_set_completion_queue(grpc_exec_ctx* exec_ctx, grpc_call* call,
+void grpc_call_set_completion_queue(grpc_call* call,
                                     grpc_completion_queue* cq) {
   GPR_ASSERT(cq);
 
@@ -489,8 +482,8 @@
   call->cq = cq;
   GRPC_CQ_INTERNAL_REF(cq, "bind");
   call->pollent = grpc_polling_entity_create_from_pollset(grpc_cq_pollset(cq));
-  grpc_call_stack_set_pollset_or_pollset_set(
-      exec_ctx, CALL_STACK_FROM_CALL(call), &call->pollent);
+  grpc_call_stack_set_pollset_or_pollset_set(CALL_STACK_FROM_CALL(call),
+                                             &call->pollent);
 }
 
 #ifndef NDEBUG
@@ -503,40 +496,38 @@
 void grpc_call_internal_ref(grpc_call* c REF_ARG) {
   GRPC_CALL_STACK_REF(CALL_STACK_FROM_CALL(c), REF_REASON);
 }
-void grpc_call_internal_unref(grpc_exec_ctx* exec_ctx, grpc_call* c REF_ARG) {
-  GRPC_CALL_STACK_UNREF(exec_ctx, CALL_STACK_FROM_CALL(c), REF_REASON);
+void grpc_call_internal_unref(grpc_call* c REF_ARG) {
+  GRPC_CALL_STACK_UNREF(CALL_STACK_FROM_CALL(c), REF_REASON);
 }
 
-static void release_call(grpc_exec_ctx* exec_ctx, void* call,
-                         grpc_error* error) {
+static void release_call(void* call, grpc_error* error) {
   grpc_call* c = (grpc_call*)call;
   grpc_channel* channel = c->channel;
   grpc_call_combiner_destroy(&c->call_combiner);
   gpr_free((char*)c->peer_string);
   grpc_channel_update_call_size_estimate(channel, gpr_arena_destroy(c->arena));
-  GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel, "call");
+  GRPC_CHANNEL_INTERNAL_UNREF(channel, "call");
 }
 
 static void set_status_value_directly(grpc_status_code status, void* dest);
-static void destroy_call(grpc_exec_ctx* exec_ctx, void* call,
-                         grpc_error* error) {
+static void destroy_call(void* call, grpc_error* error) {
   size_t i;
   int ii;
   grpc_call* c = (grpc_call*)call;
   GPR_TIMER_BEGIN("destroy_call", 0);
   for (i = 0; i < 2; i++) {
     grpc_metadata_batch_destroy(
-        exec_ctx, &c->metadata_batch[1 /* is_receiving */][i /* is_initial */]);
+        &c->metadata_batch[1 /* is_receiving */][i /* is_initial */]);
   }
   if (c->receiving_stream != nullptr) {
-    grpc_byte_stream_destroy(exec_ctx, c->receiving_stream);
+    grpc_byte_stream_destroy(c->receiving_stream);
   }
   parent_call* pc = get_parent_call(c);
   if (pc != nullptr) {
     gpr_mu_destroy(&pc->child_list_mu);
   }
   for (ii = 0; ii < c->send_extra_metadata_count; ii++) {
-    GRPC_MDELEM_UNREF(exec_ctx, c->send_extra_metadata[ii].md);
+    GRPC_MDELEM_UNREF(c->send_extra_metadata[ii].md);
   }
   for (i = 0; i < GRPC_CONTEXT_COUNT; i++) {
     if (c->context[i].destroy) {
@@ -544,12 +535,11 @@
     }
   }
   if (c->cq) {
-    GRPC_CQ_INTERNAL_UNREF(exec_ctx, c->cq, "bind");
+    GRPC_CQ_INTERNAL_UNREF(c->cq, "bind");
   }
 
-  get_final_status(exec_ctx, c, set_status_value_directly,
-                   &c->final_info.final_status, nullptr,
-                   c->final_info.error_string);
+  get_final_status(c, set_status_value_directly, &c->final_info.final_status,
+                   nullptr, c->final_info.error_string);
   c->final_info.stats.latency =
       gpr_time_sub(gpr_now(GPR_CLOCK_MONOTONIC), c->start_time);
 
@@ -558,7 +548,7 @@
         unpack_received_status(gpr_atm_acq_load(&c->status[i])).error);
   }
 
-  grpc_call_stack_destroy(exec_ctx, CALL_STACK_FROM_CALL(c), &c->final_info,
+  grpc_call_stack_destroy(CALL_STACK_FROM_CALL(c), &c->final_info,
                           GRPC_CLOSURE_INIT(&c->release_call, release_call, c,
                                             grpc_schedule_on_exec_ctx));
   GPR_TIMER_END("destroy_call", 0);
@@ -570,7 +560,7 @@
   if (!gpr_unref(&c->ext_ref)) return;
 
   child_call* cc = c->child;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GPR_TIMER_BEGIN("grpc_call_unref", 0);
   GRPC_API_TRACE("grpc_call_unref(c=%p)", 1, (c));
@@ -587,7 +577,7 @@
     cc->sibling_prev->child->sibling_next = cc->sibling_next;
     cc->sibling_next->child->sibling_prev = cc->sibling_prev;
     gpr_mu_unlock(&pc->child_list_mu);
-    GRPC_CALL_INTERNAL_UNREF(&exec_ctx, cc->parent, "child");
+    GRPC_CALL_INTERNAL_UNREF(cc->parent, "child");
   }
 
   GPR_ASSERT(!c->destroy_called);
@@ -595,53 +585,49 @@
   bool cancel = gpr_atm_acq_load(&c->any_ops_sent_atm) != 0 &&
                 gpr_atm_acq_load(&c->received_final_op_atm) == 0;
   if (cancel) {
-    cancel_with_error(&exec_ctx, c, STATUS_FROM_API_OVERRIDE,
-                      GRPC_ERROR_CANCELLED);
+    cancel_with_error(c, STATUS_FROM_API_OVERRIDE, GRPC_ERROR_CANCELLED);
   } else {
     // Unset the call combiner cancellation closure.  This has the
     // effect of scheduling the previously set cancellation closure, if
     // any, so that it can release any internal references it may be
     // holding to the call stack.
-    grpc_call_combiner_set_notify_on_cancel(&exec_ctx, &c->call_combiner,
-                                            nullptr);
+    grpc_call_combiner_set_notify_on_cancel(&c->call_combiner, nullptr);
   }
-  GRPC_CALL_INTERNAL_UNREF(&exec_ctx, c, "destroy");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CALL_INTERNAL_UNREF(c, "destroy");
+
   GPR_TIMER_END("grpc_call_unref", 0);
 }
 
 grpc_call_error grpc_call_cancel(grpc_call* call, void* reserved) {
   GRPC_API_TRACE("grpc_call_cancel(call=%p, reserved=%p)", 2, (call, reserved));
   GPR_ASSERT(!reserved);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  cancel_with_error(&exec_ctx, call, STATUS_FROM_API_OVERRIDE,
-                    GRPC_ERROR_CANCELLED);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  cancel_with_error(call, STATUS_FROM_API_OVERRIDE, GRPC_ERROR_CANCELLED);
+
   return GRPC_CALL_OK;
 }
 
 // This is called via the call combiner to start sending a batch down
 // the filter stack.
-static void execute_batch_in_call_combiner(grpc_exec_ctx* exec_ctx, void* arg,
-                                           grpc_error* ignored) {
+static void execute_batch_in_call_combiner(void* arg, grpc_error* ignored) {
   grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
   grpc_call* call = (grpc_call*)batch->handler_private.extra_arg;
   GPR_TIMER_BEGIN("execute_batch", 0);
   grpc_call_element* elem = CALL_ELEM_FROM_CALL(call, 0);
   GRPC_CALL_LOG_OP(GPR_INFO, elem, batch);
-  elem->filter->start_transport_stream_op_batch(exec_ctx, elem, batch);
+  elem->filter->start_transport_stream_op_batch(elem, batch);
   GPR_TIMER_END("execute_batch", 0);
 }
 
 // start_batch_closure points to a caller-allocated closure to be used
 // for entering the call combiner.
-static void execute_batch(grpc_exec_ctx* exec_ctx, grpc_call* call,
+static void execute_batch(grpc_call* call,
                           grpc_transport_stream_op_batch* batch,
                           grpc_closure* start_batch_closure) {
   batch->handler_private.extra_arg = call;
   GRPC_CLOSURE_INIT(start_batch_closure, execute_batch_in_call_combiner, batch,
                     grpc_schedule_on_exec_ctx);
-  GRPC_CALL_COMBINER_START(exec_ctx, &call->call_combiner, start_batch_closure,
+  GRPC_CALL_COMBINER_START(&call->call_combiner, start_batch_closure,
                            GRPC_ERROR_NONE, "executing batch");
 }
 
@@ -665,15 +651,14 @@
                                              grpc_status_code status,
                                              const char* description,
                                              void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE(
       "grpc_call_cancel_with_status("
       "c=%p, status=%d, description=%s, reserved=%p)",
       4, (c, (int)status, description, reserved));
   GPR_ASSERT(reserved == nullptr);
-  cancel_with_status(&exec_ctx, c, STATUS_FROM_API_OVERRIDE, status,
-                     description);
-  grpc_exec_ctx_finish(&exec_ctx);
+  cancel_with_status(c, STATUS_FROM_API_OVERRIDE, status, description);
+
   return GRPC_CALL_OK;
 }
 
@@ -685,24 +670,23 @@
 
 // The on_complete callback used when sending a cancel_stream batch down
 // the filter stack.  Yields the call combiner when the batch is done.
-static void done_termination(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error) {
+static void done_termination(void* arg, grpc_error* error) {
   cancel_state* state = (cancel_state*)arg;
-  GRPC_CALL_COMBINER_STOP(exec_ctx, &state->call->call_combiner,
+  GRPC_CALL_COMBINER_STOP(&state->call->call_combiner,
                           "on_complete for cancel_stream op");
-  GRPC_CALL_INTERNAL_UNREF(exec_ctx, state->call, "termination");
+  GRPC_CALL_INTERNAL_UNREF(state->call, "termination");
   gpr_free(state);
 }
 
-static void cancel_with_error(grpc_exec_ctx* exec_ctx, grpc_call* c,
-                              status_source source, grpc_error* error) {
+static void cancel_with_error(grpc_call* c, status_source source,
+                              grpc_error* error) {
   GRPC_CALL_INTERNAL_REF(c, "termination");
   // Inform the call combiner of the cancellation, so that it can cancel
   // any in-flight asynchronous actions that may be holding the call
   // combiner.  This ensures that the cancel_stream batch can be sent
   // down the filter stack in a timely manner.
-  grpc_call_combiner_cancel(exec_ctx, &c->call_combiner, GRPC_ERROR_REF(error));
-  set_status_from_error(exec_ctx, c, source, GRPC_ERROR_REF(error));
+  grpc_call_combiner_cancel(&c->call_combiner, GRPC_ERROR_REF(error));
+  set_status_from_error(c, source, GRPC_ERROR_REF(error));
   cancel_state* state = (cancel_state*)gpr_malloc(sizeof(*state));
   state->call = c;
   GRPC_CLOSURE_INIT(&state->finish_batch, done_termination, state,
@@ -711,7 +695,7 @@
       grpc_make_transport_stream_op(&state->finish_batch);
   op->cancel_stream = true;
   op->payload->cancel_stream.cancel_error = error;
-  execute_batch(exec_ctx, c, op, &state->start_batch);
+  execute_batch(c, op, &state->start_batch);
 }
 
 static grpc_error* error_from_status(grpc_status_code status,
@@ -725,11 +709,10 @@
       GRPC_ERROR_INT_GRPC_STATUS, status);
 }
 
-static void cancel_with_status(grpc_exec_ctx* exec_ctx, grpc_call* c,
-                               status_source source, grpc_status_code status,
+static void cancel_with_status(grpc_call* c, status_source source,
+                               grpc_status_code status,
                                const char* description) {
-  cancel_with_error(exec_ctx, c, source,
-                    error_from_status(status, description));
+  cancel_with_error(c, source, error_from_status(status, description));
 }
 
 /*******************************************************************************
@@ -737,14 +720,13 @@
  */
 
 static bool get_final_status_from(
-    grpc_exec_ctx* exec_ctx, grpc_call* call, grpc_error* error,
-    bool allow_ok_status,
+    grpc_call* call, grpc_error* error, bool allow_ok_status,
     void (*set_value)(grpc_status_code code, void* user_data),
     void* set_value_user_data, grpc_slice* details, const char** error_string) {
   grpc_status_code code;
   grpc_slice slice = grpc_empty_slice();
-  grpc_error_get_status(exec_ctx, error, call->send_deadline, &code, &slice,
-                        nullptr, error_string);
+  grpc_error_get_status(error, call->send_deadline, &code, &slice, nullptr,
+                        error_string);
   if (code == GRPC_STATUS_OK && !allow_ok_status) {
     return false;
   }
@@ -756,11 +738,9 @@
   return true;
 }
 
-static void get_final_status(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                             void (*set_value)(grpc_status_code code,
-                                               void* user_data),
-                             void* set_value_user_data, grpc_slice* details,
-                             const char** error_string) {
+static void get_final_status(
+    grpc_call* call, void (*set_value)(grpc_status_code code, void* user_data),
+    void* set_value_user_data, grpc_slice* details, const char** error_string) {
   int i;
   received_status status[STATUS_SOURCE_COUNT];
   for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
@@ -782,9 +762,9 @@
     for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
       if (status[i].is_set &&
           grpc_error_has_clear_grpc_status(status[i].error)) {
-        if (get_final_status_from(exec_ctx, call, status[i].error,
-                                  allow_ok_status != 0, set_value,
-                                  set_value_user_data, details, error_string)) {
+        if (get_final_status_from(call, status[i].error, allow_ok_status != 0,
+                                  set_value, set_value_user_data, details,
+                                  error_string)) {
           return;
         }
       }
@@ -792,9 +772,9 @@
     /* If no clearly defined status exists, search for 'anything' */
     for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
       if (status[i].is_set) {
-        if (get_final_status_from(exec_ctx, call, status[i].error,
-                                  allow_ok_status != 0, set_value,
-                                  set_value_user_data, details, error_string)) {
+        if (get_final_status_from(call, status[i].error, allow_ok_status != 0,
+                                  set_value, set_value_user_data, details,
+                                  error_string)) {
           return;
         }
       }
@@ -808,8 +788,8 @@
   }
 }
 
-static void set_status_from_error(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                                  status_source source, grpc_error* error) {
+static void set_status_from_error(grpc_call* call, status_source source,
+                                  grpc_error* error) {
   if (!gpr_atm_rel_cas(&call->status[source],
                        pack_received_status({false, GRPC_ERROR_NONE}),
                        pack_received_status({true, error}))) {
@@ -861,8 +841,7 @@
 
 static void destroy_encodings_accepted_by_peer(void* p) { return; }
 
-static void set_encodings_accepted_by_peer(grpc_exec_ctx* exec_ctx,
-                                           grpc_call* call, grpc_mdelem mdel) {
+static void set_encodings_accepted_by_peer(grpc_call* call, grpc_mdelem mdel) {
   size_t i;
   grpc_compression_algorithm algorithm;
   grpc_slice_buffer accept_encoding_parts;
@@ -900,15 +879,14 @@
     }
   }
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &accept_encoding_parts);
+  grpc_slice_buffer_destroy_internal(&accept_encoding_parts);
 
   grpc_mdelem_set_user_data(
       mdel, destroy_encodings_accepted_by_peer,
       (void*)(((uintptr_t)call->encodings_accepted_by_peer) + 1));
 }
 
-static void set_stream_encodings_accepted_by_peer(grpc_exec_ctx* exec_ctx,
-                                                  grpc_call* call,
+static void set_stream_encodings_accepted_by_peer(grpc_call* call,
                                                   grpc_mdelem mdel) {
   size_t i;
   grpc_stream_compression_algorithm algorithm;
@@ -946,7 +924,7 @@
     }
   }
 
-  grpc_slice_buffer_destroy_internal(exec_ctx, &accept_encoding_parts);
+  grpc_slice_buffer_destroy_internal(&accept_encoding_parts);
 
   grpc_mdelem_set_user_data(
       mdel, destroy_encodings_accepted_by_peer,
@@ -984,10 +962,12 @@
   return res;
 }
 
-static int prepare_application_metadata(
-    grpc_exec_ctx* exec_ctx, grpc_call* call, int count,
-    grpc_metadata* metadata, int is_trailing, int prepend_extra_metadata,
-    grpc_metadata* additional_metadata, int additional_metadata_count) {
+static int prepare_application_metadata(grpc_call* call, int count,
+                                        grpc_metadata* metadata,
+                                        int is_trailing,
+                                        int prepend_extra_metadata,
+                                        grpc_metadata* additional_metadata,
+                                        int additional_metadata_count) {
   int total_count = count + additional_metadata_count;
   int i;
   grpc_metadata_batch* batch =
@@ -1006,14 +986,14 @@
                    grpc_validate_header_nonbin_value_is_legal(md->value))) {
       break;
     }
-    l->md = grpc_mdelem_from_grpc_metadata(exec_ctx, (grpc_metadata*)md);
+    l->md = grpc_mdelem_from_grpc_metadata((grpc_metadata*)md);
   }
   if (i != total_count) {
     for (int j = 0; j < i; j++) {
       const grpc_metadata* md =
           get_md_elem(metadata, additional_metadata, j, count);
       grpc_linked_mdelem* l = linked_from_md(md);
-      GRPC_MDELEM_UNREF(exec_ctx, l->md);
+      GRPC_MDELEM_UNREF(l->md);
     }
     return 0;
   }
@@ -1024,16 +1004,16 @@
       for (i = 0; i < call->send_extra_metadata_count; i++) {
         GRPC_LOG_IF_ERROR("prepare_application_metadata",
                           grpc_metadata_batch_link_tail(
-                              exec_ctx, batch, &call->send_extra_metadata[i]));
+                              batch, &call->send_extra_metadata[i]));
       }
     }
   }
   for (i = 0; i < total_count; i++) {
     grpc_metadata* md = get_md_elem(metadata, additional_metadata, i, count);
     grpc_linked_mdelem* l = linked_from_md(md);
-    grpc_error* error = grpc_metadata_batch_link_tail(exec_ctx, batch, l);
+    grpc_error* error = grpc_metadata_batch_link_tail(batch, l);
     if (error != GRPC_ERROR_NONE) {
-      GRPC_MDELEM_UNREF(exec_ctx, l->md);
+      GRPC_MDELEM_UNREF(l->md);
     }
     GRPC_LOG_IF_ERROR("prepare_application_metadata", error);
   }
@@ -1120,46 +1100,43 @@
   GPR_TIMER_END("publish_app_metadata", 0);
 }
 
-static void recv_initial_filter(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                                grpc_metadata_batch* b) {
+static void recv_initial_filter(grpc_call* call, grpc_metadata_batch* b) {
   if (b->idx.named.content_encoding != nullptr) {
     if (b->idx.named.grpc_encoding != nullptr) {
       gpr_log(GPR_ERROR,
               "Received both content-encoding and grpc-encoding header. "
               "Ignoring grpc-encoding.");
-      grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_encoding);
+      grpc_metadata_batch_remove(b, b->idx.named.grpc_encoding);
     }
     GPR_TIMER_BEGIN("incoming_stream_compression_algorithm", 0);
     set_incoming_stream_compression_algorithm(
         call, decode_stream_compression(b->idx.named.content_encoding->md));
     GPR_TIMER_END("incoming_stream_compression_algorithm", 0);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.content_encoding);
+    grpc_metadata_batch_remove(b, b->idx.named.content_encoding);
   } else if (b->idx.named.grpc_encoding != nullptr) {
     GPR_TIMER_BEGIN("incoming_compression_algorithm", 0);
     set_incoming_compression_algorithm(
         call, decode_compression(b->idx.named.grpc_encoding->md));
     GPR_TIMER_END("incoming_compression_algorithm", 0);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_encoding);
+    grpc_metadata_batch_remove(b, b->idx.named.grpc_encoding);
   }
   if (b->idx.named.grpc_accept_encoding != nullptr) {
     GPR_TIMER_BEGIN("encodings_accepted_by_peer", 0);
-    set_encodings_accepted_by_peer(exec_ctx, call,
-                                   b->idx.named.grpc_accept_encoding->md);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_accept_encoding);
+    set_encodings_accepted_by_peer(call, b->idx.named.grpc_accept_encoding->md);
+    grpc_metadata_batch_remove(b, b->idx.named.grpc_accept_encoding);
     GPR_TIMER_END("encodings_accepted_by_peer", 0);
   }
   if (b->idx.named.accept_encoding != nullptr) {
     GPR_TIMER_BEGIN("stream_encodings_accepted_by_peer", 0);
-    set_stream_encodings_accepted_by_peer(exec_ctx, call,
+    set_stream_encodings_accepted_by_peer(call,
                                           b->idx.named.accept_encoding->md);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.accept_encoding);
+    grpc_metadata_batch_remove(b, b->idx.named.accept_encoding);
     GPR_TIMER_END("stream_encodings_accepted_by_peer", 0);
   }
   publish_app_metadata(call, b, false);
 }
 
-static void recv_trailing_filter(grpc_exec_ctx* exec_ctx, void* args,
-                                 grpc_metadata_batch* b) {
+static void recv_trailing_filter(void* args, grpc_metadata_batch* b) {
   grpc_call* call = (grpc_call*)args;
   if (b->idx.named.grpc_status != nullptr) {
     uint32_t status_code = decode_status(b->idx.named.grpc_status->md);
@@ -1174,13 +1151,13 @@
       error = grpc_error_set_str(
           error, GRPC_ERROR_STR_GRPC_MESSAGE,
           grpc_slice_ref_internal(GRPC_MDVALUE(b->idx.named.grpc_message->md)));
-      grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_message);
+      grpc_metadata_batch_remove(b, b->idx.named.grpc_message);
     } else if (error != GRPC_ERROR_NONE) {
       error = grpc_error_set_str(error, GRPC_ERROR_STR_GRPC_MESSAGE,
                                  grpc_empty_slice());
     }
-    set_status_from_error(exec_ctx, call, STATUS_FROM_WIRE, error);
-    grpc_metadata_batch_remove(exec_ctx, b, b->idx.named.grpc_status);
+    set_status_from_error(call, STATUS_FROM_WIRE, error);
+    grpc_metadata_batch_remove(b, b->idx.named.grpc_status);
   }
   publish_app_metadata(call, b, true);
 }
@@ -1257,12 +1234,12 @@
   return bctl;
 }
 
-static void finish_batch_completion(grpc_exec_ctx* exec_ctx, void* user_data,
+static void finish_batch_completion(void* user_data,
                                     grpc_cq_completion* storage) {
   batch_control* bctl = (batch_control*)user_data;
   grpc_call* call = bctl->call;
   bctl->call = nullptr;
-  GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, "completion");
+  GRPC_CALL_INTERNAL_UNREF(call, "completion");
 }
 
 static grpc_error* consolidate_batch_errors(batch_control* bctl) {
@@ -1286,15 +1263,13 @@
   }
 }
 
-static void post_batch_completion(grpc_exec_ctx* exec_ctx,
-                                  batch_control* bctl) {
+static void post_batch_completion(batch_control* bctl) {
   grpc_call* next_child_call;
   grpc_call* call = bctl->call;
   grpc_error* error = consolidate_batch_errors(bctl);
 
   if (bctl->op.send_initial_metadata) {
     grpc_metadata_batch_destroy(
-        exec_ctx,
         &call->metadata_batch[0 /* is_receiving */][0 /* is_trailing */]);
   }
   if (bctl->op.send_message) {
@@ -1302,13 +1277,12 @@
   }
   if (bctl->op.send_trailing_metadata) {
     grpc_metadata_batch_destroy(
-        exec_ctx,
         &call->metadata_batch[0 /* is_receiving */][1 /* is_trailing */]);
   }
   if (bctl->op.recv_trailing_metadata) {
     grpc_metadata_batch* md =
         &call->metadata_batch[1 /* is_receiving */][1 /* is_trailing */];
-    recv_trailing_filter(exec_ctx, call, md);
+    recv_trailing_filter(call, md);
 
     /* propagate cancellation to any interested children */
     gpr_atm_rel_store(&call->received_final_op_atm, 1);
@@ -1322,9 +1296,9 @@
           next_child_call = child->child->sibling_next;
           if (child->cancellation_is_inherited) {
             GRPC_CALL_INTERNAL_REF(child, "propagate_cancel");
-            cancel_with_error(exec_ctx, child, STATUS_FROM_API_OVERRIDE,
+            cancel_with_error(child, STATUS_FROM_API_OVERRIDE,
                               GRPC_ERROR_CANCELLED);
-            GRPC_CALL_INTERNAL_UNREF(exec_ctx, child, "propagate_cancel");
+            GRPC_CALL_INTERNAL_UNREF(child, "propagate_cancel");
           }
           child = next_child_call;
         } while (child != pc->first_child);
@@ -1333,12 +1307,12 @@
     }
 
     if (call->is_client) {
-      get_final_status(exec_ctx, call, set_status_value_directly,
+      get_final_status(call, set_status_value_directly,
                        call->final_op.client.status,
                        call->final_op.client.status_details,
                        call->final_op.client.error_string);
     } else {
-      get_final_status(exec_ctx, call, set_cancelled_value,
+      get_final_status(call, set_cancelled_value,
                        call->final_op.server.cancelled, nullptr, nullptr);
     }
 
@@ -1354,25 +1328,24 @@
   if (bctl->completion_data.notify_tag.is_closure) {
     /* unrefs bctl->error */
     bctl->call = nullptr;
-    GRPC_CLOSURE_RUN(
-        exec_ctx, (grpc_closure*)bctl->completion_data.notify_tag.tag, error);
-    GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, "completion");
+    GRPC_CLOSURE_RUN((grpc_closure*)bctl->completion_data.notify_tag.tag,
+                     error);
+    GRPC_CALL_INTERNAL_UNREF(call, "completion");
   } else {
     /* unrefs bctl->error */
-    grpc_cq_end_op(
-        exec_ctx, bctl->call->cq, bctl->completion_data.notify_tag.tag, error,
-        finish_batch_completion, bctl, &bctl->completion_data.cq_completion);
+    grpc_cq_end_op(bctl->call->cq, bctl->completion_data.notify_tag.tag, error,
+                   finish_batch_completion, bctl,
+                   &bctl->completion_data.cq_completion);
   }
 }
 
-static void finish_batch_step(grpc_exec_ctx* exec_ctx, batch_control* bctl) {
+static void finish_batch_step(batch_control* bctl) {
   if (gpr_unref(&bctl->steps_to_complete)) {
-    post_batch_completion(exec_ctx, bctl);
+    post_batch_completion(bctl);
   }
 }
 
-static void continue_receiving_slices(grpc_exec_ctx* exec_ctx,
-                                      batch_control* bctl) {
+static void continue_receiving_slices(batch_control* bctl) {
   grpc_error* error;
   grpc_call* call = bctl->call;
   for (;;) {
@@ -1380,25 +1353,25 @@
                        (*call->receiving_buffer)->data.raw.slice_buffer.length;
     if (remaining == 0) {
       call->receiving_message = 0;
-      grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+      grpc_byte_stream_destroy(call->receiving_stream);
       call->receiving_stream = nullptr;
-      finish_batch_step(exec_ctx, bctl);
+      finish_batch_step(bctl);
       return;
     }
-    if (grpc_byte_stream_next(exec_ctx, call->receiving_stream, remaining,
+    if (grpc_byte_stream_next(call->receiving_stream, remaining,
                               &call->receiving_slice_ready)) {
-      error = grpc_byte_stream_pull(exec_ctx, call->receiving_stream,
-                                    &call->receiving_slice);
+      error =
+          grpc_byte_stream_pull(call->receiving_stream, &call->receiving_slice);
       if (error == GRPC_ERROR_NONE) {
         grpc_slice_buffer_add(&(*call->receiving_buffer)->data.raw.slice_buffer,
                               call->receiving_slice);
       } else {
-        grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+        grpc_byte_stream_destroy(call->receiving_stream);
         call->receiving_stream = nullptr;
         grpc_byte_buffer_destroy(*call->receiving_buffer);
         *call->receiving_buffer = nullptr;
         call->receiving_message = 0;
-        finish_batch_step(exec_ctx, bctl);
+        finish_batch_step(bctl);
         return;
       }
     } else {
@@ -1407,8 +1380,7 @@
   }
 }
 
-static void receiving_slice_ready(grpc_exec_ctx* exec_ctx, void* bctlp,
-                                  grpc_error* error) {
+static void receiving_slice_ready(void* bctlp, grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
   grpc_byte_stream* bs = call->receiving_stream;
@@ -1416,11 +1388,11 @@
 
   if (error == GRPC_ERROR_NONE) {
     grpc_slice slice;
-    error = grpc_byte_stream_pull(exec_ctx, bs, &slice);
+    error = grpc_byte_stream_pull(bs, &slice);
     if (error == GRPC_ERROR_NONE) {
       grpc_slice_buffer_add(&(*call->receiving_buffer)->data.raw.slice_buffer,
                             slice);
-      continue_receiving_slices(exec_ctx, bctl);
+      continue_receiving_slices(bctl);
     } else {
       /* Error returned by grpc_byte_stream_pull needs to be released manually
        */
@@ -1432,25 +1404,24 @@
     if (grpc_trace_operation_failures.enabled()) {
       GRPC_LOG_IF_ERROR("receiving_slice_ready", GRPC_ERROR_REF(error));
     }
-    grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+    grpc_byte_stream_destroy(call->receiving_stream);
     call->receiving_stream = nullptr;
     grpc_byte_buffer_destroy(*call->receiving_buffer);
     *call->receiving_buffer = nullptr;
     call->receiving_message = 0;
-    finish_batch_step(exec_ctx, bctl);
+    finish_batch_step(bctl);
     if (release_error) {
       GRPC_ERROR_UNREF(error);
     }
   }
 }
 
-static void process_data_after_md(grpc_exec_ctx* exec_ctx,
-                                  batch_control* bctl) {
+static void process_data_after_md(batch_control* bctl) {
   grpc_call* call = bctl->call;
   if (call->receiving_stream == nullptr) {
     *call->receiving_buffer = nullptr;
     call->receiving_message = 0;
-    finish_batch_step(exec_ctx, bctl);
+    finish_batch_step(bctl);
   } else {
     call->test_only_last_message_flags = call->receiving_stream->flags;
     if ((call->receiving_stream->flags & GRPC_WRITE_INTERNAL_COMPRESS) &&
@@ -1462,46 +1433,42 @@
     }
     GRPC_CLOSURE_INIT(&call->receiving_slice_ready, receiving_slice_ready, bctl,
                       grpc_schedule_on_exec_ctx);
-    continue_receiving_slices(exec_ctx, bctl);
+    continue_receiving_slices(bctl);
   }
 }
 
-static void receiving_stream_ready(grpc_exec_ctx* exec_ctx, void* bctlp,
-                                   grpc_error* error) {
+static void receiving_stream_ready(void* bctlp, grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
   if (error != GRPC_ERROR_NONE) {
     if (call->receiving_stream != nullptr) {
-      grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+      grpc_byte_stream_destroy(call->receiving_stream);
       call->receiving_stream = nullptr;
     }
-    add_batch_error(exec_ctx, bctl, GRPC_ERROR_REF(error), true);
-    cancel_with_error(exec_ctx, call, STATUS_FROM_SURFACE,
-                      GRPC_ERROR_REF(error));
+    add_batch_error(bctl, GRPC_ERROR_REF(error), true);
+    cancel_with_error(call, STATUS_FROM_SURFACE, GRPC_ERROR_REF(error));
   }
   /* If recv_state is RECV_NONE, we will save the batch_control
    * object with rel_cas, and will not use it after the cas. Its corresponding
    * acq_load is in receiving_initial_metadata_ready() */
   if (error != GRPC_ERROR_NONE || call->receiving_stream == nullptr ||
       !gpr_atm_rel_cas(&call->recv_state, RECV_NONE, (gpr_atm)bctlp)) {
-    process_data_after_md(exec_ctx, bctl);
+    process_data_after_md(bctl);
   }
 }
 
 // The recv_message_ready callback used when sending a batch containing
 // a recv_message op down the filter stack.  Yields the call combiner
 // before processing the received message.
-static void receiving_stream_ready_in_call_combiner(grpc_exec_ctx* exec_ctx,
-                                                    void* bctlp,
+static void receiving_stream_ready_in_call_combiner(void* bctlp,
                                                     grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
-  GRPC_CALL_COMBINER_STOP(exec_ctx, &call->call_combiner, "recv_message_ready");
-  receiving_stream_ready(exec_ctx, bctlp, error);
+  GRPC_CALL_COMBINER_STOP(&call->call_combiner, "recv_message_ready");
+  receiving_stream_ready(bctlp, error);
 }
 
-static void validate_filtered_metadata(grpc_exec_ctx* exec_ctx,
-                                       batch_control* bctl) {
+static void validate_filtered_metadata(batch_control* bctl) {
   grpc_call* call = bctl->call;
   /* validate compression algorithms */
   if (call->incoming_stream_compression_algorithm !=
@@ -1515,8 +1482,8 @@
       gpr_asprintf(&error_msg,
                    "Invalid stream compression algorithm value '%d'.", algo);
       gpr_log(GPR_ERROR, "%s", error_msg);
-      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
-                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+      cancel_with_status(call, STATUS_FROM_SURFACE, GRPC_STATUS_UNIMPLEMENTED,
+                         error_msg);
     } else if (grpc_compression_options_is_stream_compression_algorithm_enabled(
                    &compression_options, algo) == 0) {
       /* check if algorithm is supported by current channel config */
@@ -1525,8 +1492,8 @@
       gpr_asprintf(&error_msg, "Stream compression algorithm '%s' is disabled.",
                    algo_name);
       gpr_log(GPR_ERROR, "%s", error_msg);
-      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
-                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+      cancel_with_status(call, STATUS_FROM_SURFACE, GRPC_STATUS_UNIMPLEMENTED,
+                         error_msg);
     }
     gpr_free(error_msg);
 
@@ -1556,8 +1523,8 @@
       gpr_asprintf(&error_msg, "Invalid compression algorithm value '%d'.",
                    algo);
       gpr_log(GPR_ERROR, "%s", error_msg);
-      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
-                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+      cancel_with_status(call, STATUS_FROM_SURFACE, GRPC_STATUS_UNIMPLEMENTED,
+                         error_msg);
     } else if (grpc_compression_options_is_algorithm_enabled(
                    &compression_options, algo) == 0) {
       /* check if algorithm is supported by current channel config */
@@ -1566,8 +1533,8 @@
       gpr_asprintf(&error_msg, "Compression algorithm '%s' is disabled.",
                    algo_name);
       gpr_log(GPR_ERROR, "%s", error_msg);
-      cancel_with_status(exec_ctx, call, STATUS_FROM_SURFACE,
-                         GRPC_STATUS_UNIMPLEMENTED, error_msg);
+      cancel_with_status(call, STATUS_FROM_SURFACE, GRPC_STATUS_UNIMPLEMENTED,
+                         error_msg);
     } else {
       call->incoming_compression_algorithm = algo;
     }
@@ -1590,34 +1557,31 @@
   }
 }
 
-static void add_batch_error(grpc_exec_ctx* exec_ctx, batch_control* bctl,
-                            grpc_error* error, bool has_cancelled) {
+static void add_batch_error(batch_control* bctl, grpc_error* error,
+                            bool has_cancelled) {
   if (error == GRPC_ERROR_NONE) return;
   int idx = (int)gpr_atm_full_fetch_add(&bctl->num_errors, 1);
   if (idx == 0 && !has_cancelled) {
-    cancel_with_error(exec_ctx, bctl->call, STATUS_FROM_CORE,
-                      GRPC_ERROR_REF(error));
+    cancel_with_error(bctl->call, STATUS_FROM_CORE, GRPC_ERROR_REF(error));
   }
   bctl->errors[idx] = error;
 }
 
-static void receiving_initial_metadata_ready(grpc_exec_ctx* exec_ctx,
-                                             void* bctlp, grpc_error* error) {
+static void receiving_initial_metadata_ready(void* bctlp, grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
 
-  GRPC_CALL_COMBINER_STOP(exec_ctx, &call->call_combiner,
-                          "recv_initial_metadata_ready");
+  GRPC_CALL_COMBINER_STOP(&call->call_combiner, "recv_initial_metadata_ready");
 
-  add_batch_error(exec_ctx, bctl, GRPC_ERROR_REF(error), false);
+  add_batch_error(bctl, GRPC_ERROR_REF(error), false);
   if (error == GRPC_ERROR_NONE) {
     grpc_metadata_batch* md =
         &call->metadata_batch[1 /* is_receiving */][0 /* is_trailing */];
-    recv_initial_filter(exec_ctx, call, md);
+    recv_initial_filter(call, md);
 
     /* TODO(ctiller): this could be moved into recv_initial_filter now */
     GPR_TIMER_BEGIN("validate_filtered_metadata", 0);
-    validate_filtered_metadata(exec_ctx, bctl);
+    validate_filtered_metadata(bctl);
     GPR_TIMER_END("validate_filtered_metadata", 0);
 
     if (md->deadline != GRPC_MILLIS_INF_FUTURE && !call->is_client) {
@@ -1650,28 +1614,25 @@
     }
   }
   if (saved_rsr_closure != nullptr) {
-    GRPC_CLOSURE_RUN(exec_ctx, saved_rsr_closure, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_RUN(saved_rsr_closure, GRPC_ERROR_REF(error));
   }
 
-  finish_batch_step(exec_ctx, bctl);
+  finish_batch_step(bctl);
 }
 
-static void finish_batch(grpc_exec_ctx* exec_ctx, void* bctlp,
-                         grpc_error* error) {
+static void finish_batch(void* bctlp, grpc_error* error) {
   batch_control* bctl = (batch_control*)bctlp;
   grpc_call* call = bctl->call;
-  GRPC_CALL_COMBINER_STOP(exec_ctx, &call->call_combiner, "on_complete");
-  add_batch_error(exec_ctx, bctl, GRPC_ERROR_REF(error), false);
-  finish_batch_step(exec_ctx, bctl);
+  GRPC_CALL_COMBINER_STOP(&call->call_combiner, "on_complete");
+  add_batch_error(bctl, GRPC_ERROR_REF(error), false);
+  finish_batch_step(bctl);
 }
 
-static void free_no_op_completion(grpc_exec_ctx* exec_ctx, void* p,
-                                  grpc_cq_completion* completion) {
+static void free_no_op_completion(void* p, grpc_cq_completion* completion) {
   gpr_free(completion);
 }
 
-static grpc_call_error call_start_batch(grpc_exec_ctx* exec_ctx,
-                                        grpc_call* call, const grpc_op* ops,
+static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
                                         size_t nops, void* notify_tag,
                                         int is_notify_tag_closure) {
   size_t i;
@@ -1689,11 +1650,10 @@
     if (!is_notify_tag_closure) {
       GPR_ASSERT(grpc_cq_begin_op(call->cq, notify_tag));
       grpc_cq_end_op(
-          exec_ctx, call->cq, notify_tag, GRPC_ERROR_NONE,
-          free_no_op_completion, nullptr,
+          call->cq, notify_tag, GRPC_ERROR_NONE, free_no_op_completion, nullptr,
           (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion)));
     } else {
-      GRPC_CLOSURE_SCHED(exec_ctx, (grpc_closure*)notify_tag, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED((grpc_closure*)notify_tag, GRPC_ERROR_NONE);
     }
     error = GRPC_CALL_OK;
     goto done;
@@ -1793,7 +1753,7 @@
         stream_op->send_initial_metadata = true;
         call->sent_initial_metadata = true;
         if (!prepare_application_metadata(
-                exec_ctx, call, (int)op->data.send_initial_metadata.count,
+                call, (int)op->data.send_initial_metadata.count,
                 op->data.send_initial_metadata.metadata, 0, call->is_client,
                 &call->compression_md, (int)additional_metadata_count)) {
           error = GRPC_CALL_ERROR_INVALID_METADATA;
@@ -1887,7 +1847,7 @@
         GPR_ASSERT(call->send_extra_metadata_count == 0);
         call->send_extra_metadata_count = 1;
         call->send_extra_metadata[0].md = grpc_channel_get_reffed_status_elem(
-            exec_ctx, call->channel, op->data.send_status_from_server.status);
+            call->channel, op->data.send_status_from_server.status);
         {
           grpc_error* override_error = GRPC_ERROR_NONE;
           if (op->data.send_status_from_server.status != GRPC_STATUS_OK) {
@@ -1896,7 +1856,7 @@
           }
           if (op->data.send_status_from_server.status_details != nullptr) {
             call->send_extra_metadata[1].md = grpc_mdelem_from_slices(
-                exec_ctx, GRPC_MDSTR_GRPC_MESSAGE,
+                GRPC_MDSTR_GRPC_MESSAGE,
                 grpc_slice_ref_internal(
                     *op->data.send_status_from_server.status_details));
             call->send_extra_metadata_count++;
@@ -1907,16 +1867,15 @@
                                    grpc_slice_from_copied_string(msg));
             gpr_free(msg);
           }
-          set_status_from_error(exec_ctx, call, STATUS_FROM_API_OVERRIDE,
-                                override_error);
+          set_status_from_error(call, STATUS_FROM_API_OVERRIDE, override_error);
         }
         if (!prepare_application_metadata(
-                exec_ctx, call,
+                call,
                 (int)op->data.send_status_from_server.trailing_metadata_count,
                 op->data.send_status_from_server.trailing_metadata, 1, 1,
                 nullptr, 0)) {
           for (int n = 0; n < call->send_extra_metadata_count; n++) {
-            GRPC_MDELEM_UNREF(exec_ctx, call->send_extra_metadata[n].md);
+            GRPC_MDELEM_UNREF(call->send_extra_metadata[n].md);
           }
           call->send_extra_metadata_count = 0;
           error = GRPC_CALL_ERROR_INVALID_METADATA;
@@ -2045,7 +2004,7 @@
   stream_op->on_complete = &bctl->finish_batch;
   gpr_atm_rel_store(&call->any_ops_sent_atm, 1);
 
-  execute_batch(exec_ctx, call, stream_op, &bctl->start_batch);
+  execute_batch(call, stream_op, &bctl->start_batch);
 
 done:
   GPR_TIMER_END("grpc_call_start_batch", 0);
@@ -2055,15 +2014,15 @@
   /* reverse any mutations that occured */
   if (stream_op->send_initial_metadata) {
     call->sent_initial_metadata = false;
-    grpc_metadata_batch_clear(exec_ctx, &call->metadata_batch[0][0]);
+    grpc_metadata_batch_clear(&call->metadata_batch[0][0]);
   }
   if (stream_op->send_message) {
     call->sending_message = false;
-    grpc_byte_stream_destroy(exec_ctx, &call->sending_stream.base);
+    grpc_byte_stream_destroy(&call->sending_stream.base);
   }
   if (stream_op->send_trailing_metadata) {
     call->sent_final_op = false;
-    grpc_metadata_batch_clear(exec_ctx, &call->metadata_batch[0][1]);
+    grpc_metadata_batch_clear(&call->metadata_batch[0][1]);
   }
   if (stream_op->recv_initial_metadata) {
     call->received_initial_metadata = false;
@@ -2079,7 +2038,7 @@
 
 grpc_call_error grpc_call_start_batch(grpc_call* call, const grpc_op* ops,
                                       size_t nops, void* tag, void* reserved) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_call_error err;
 
   GRPC_API_TRACE(
@@ -2090,19 +2049,17 @@
   if (reserved != nullptr) {
     err = GRPC_CALL_ERROR;
   } else {
-    err = call_start_batch(&exec_ctx, call, ops, nops, tag, 0);
+    err = call_start_batch(call, ops, nops, tag, 0);
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   return err;
 }
 
-grpc_call_error grpc_call_start_batch_and_execute(grpc_exec_ctx* exec_ctx,
-                                                  grpc_call* call,
+grpc_call_error grpc_call_start_batch_and_execute(grpc_call* call,
                                                   const grpc_op* ops,
                                                   size_t nops,
                                                   grpc_closure* closure) {
-  return call_start_batch(exec_ctx, call, ops, nops, closure, 1);
+  return call_start_batch(call, ops, nops, closure, 1);
 }
 
 void grpc_call_context_set(grpc_call* call, grpc_context_index elem,
diff --git a/src/core/lib/surface/call.h b/src/core/lib/surface/call.h
index 1d2e266..189329c 100644
--- a/src/core/lib/surface/call.h
+++ b/src/core/lib/surface/call.h
@@ -26,8 +26,7 @@
 #include <grpc/grpc.h>
 #include <grpc/impl/codegen/compression_types.h>
 
-typedef void (*grpc_ioreq_completion_func)(grpc_exec_ctx* exec_ctx,
-                                           grpc_call* call, int success,
+typedef void (*grpc_ioreq_completion_func)(grpc_call* call, int success,
                                            void* user_data);
 
 typedef struct grpc_call_create_args {
@@ -51,33 +50,28 @@
 /* Create a new call based on \a args.
    Regardless of success or failure, always returns a valid new call into *call
    */
-grpc_error* grpc_call_create(grpc_exec_ctx* exec_ctx,
-                             const grpc_call_create_args* args,
+grpc_error* grpc_call_create(const grpc_call_create_args* args,
                              grpc_call** call);
 
-void grpc_call_set_completion_queue(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                                    grpc_completion_queue* cq);
+void grpc_call_set_completion_queue(grpc_call* call, grpc_completion_queue* cq);
 
 #ifndef NDEBUG
 void grpc_call_internal_ref(grpc_call* call, const char* reason);
-void grpc_call_internal_unref(grpc_exec_ctx* exec_ctx, grpc_call* call,
-                              const char* reason);
+void grpc_call_internal_unref(grpc_call* call, const char* reason);
 #define GRPC_CALL_INTERNAL_REF(call, reason) \
   grpc_call_internal_ref(call, reason)
-#define GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, reason) \
-  grpc_call_internal_unref(exec_ctx, call, reason)
+#define GRPC_CALL_INTERNAL_UNREF(call, reason) \
+  grpc_call_internal_unref(call, reason)
 #else
 void grpc_call_internal_ref(grpc_call* call);
-void grpc_call_internal_unref(grpc_exec_ctx* exec_ctx, grpc_call* call);
+void grpc_call_internal_unref(grpc_call* call);
 #define GRPC_CALL_INTERNAL_REF(call, reason) grpc_call_internal_ref(call)
-#define GRPC_CALL_INTERNAL_UNREF(exec_ctx, call, reason) \
-  grpc_call_internal_unref(exec_ctx, call)
+#define GRPC_CALL_INTERNAL_UNREF(call, reason) grpc_call_internal_unref(call)
 #endif
 
 grpc_call_stack* grpc_call_get_call_stack(grpc_call* call);
 
-grpc_call_error grpc_call_start_batch_and_execute(grpc_exec_ctx* exec_ctx,
-                                                  grpc_call* call,
+grpc_call_error grpc_call_start_batch_and_execute(grpc_call* call,
                                                   const grpc_op* ops,
                                                   size_t nops,
                                                   grpc_closure* closure);
diff --git a/src/core/lib/surface/call_details.cc b/src/core/lib/surface/call_details.cc
index ea9208c..cd0b145 100644
--- a/src/core/lib/surface/call_details.cc
+++ b/src/core/lib/surface/call_details.cc
@@ -34,8 +34,7 @@
 
 void grpc_call_details_destroy(grpc_call_details* cd) {
   GRPC_API_TRACE("grpc_call_details_destroy(cd=%p)", 1, (cd));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_unref_internal(&exec_ctx, cd->method);
-  grpc_slice_unref_internal(&exec_ctx, cd->host);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_unref_internal(cd->method);
+  grpc_slice_unref_internal(cd->host);
 }
diff --git a/src/core/lib/surface/channel.cc b/src/core/lib/surface/channel.cc
index 1be734c..cf5e8c2 100644
--- a/src/core/lib/surface/channel.cc
+++ b/src/core/lib/surface/channel.cc
@@ -69,23 +69,22 @@
 #define CHANNEL_FROM_TOP_ELEM(top_elem) \
   CHANNEL_FROM_CHANNEL_STACK(grpc_channel_stack_from_top_element(top_elem))
 
-static void destroy_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error);
+static void destroy_channel(void* arg, grpc_error* error);
 
 grpc_channel* grpc_channel_create_with_builder(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
+    grpc_channel_stack_builder* builder,
     grpc_channel_stack_type channel_stack_type) {
   char* target = gpr_strdup(grpc_channel_stack_builder_get_target(builder));
   grpc_channel_args* args = grpc_channel_args_copy(
       grpc_channel_stack_builder_get_channel_arguments(builder));
   grpc_channel* channel;
   if (channel_stack_type == GRPC_SERVER_CHANNEL) {
-    GRPC_STATS_INC_SERVER_CHANNELS_CREATED(exec_ctx);
+    GRPC_STATS_INC_SERVER_CHANNELS_CREATED();
   } else {
-    GRPC_STATS_INC_CLIENT_CHANNELS_CREATED(exec_ctx);
+    GRPC_STATS_INC_CLIENT_CHANNELS_CREATED();
   }
   grpc_error* error = grpc_channel_stack_builder_finish(
-      exec_ctx, builder, sizeof(grpc_channel), 1, destroy_channel, nullptr,
+      builder, sizeof(grpc_channel), 1, destroy_channel, nullptr,
       (void**)&channel);
   if (error != GRPC_ERROR_NONE) {
     gpr_log(GPR_ERROR, "channel stack builder failed: %s",
@@ -114,10 +113,10 @@
       } else {
         if (!GRPC_MDISNULL(channel->default_authority)) {
           /* setting this takes precedence over anything else */
-          GRPC_MDELEM_UNREF(exec_ctx, channel->default_authority);
+          GRPC_MDELEM_UNREF(channel->default_authority);
         }
         channel->default_authority = grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_AUTHORITY,
+            GRPC_MDSTR_AUTHORITY,
             grpc_slice_intern(
                 grpc_slice_from_static_string(args->args[i].value.string)));
       }
@@ -134,7 +133,7 @@
                   GRPC_SSL_TARGET_NAME_OVERRIDE_ARG);
         } else {
           channel->default_authority = grpc_mdelem_from_slices(
-              exec_ctx, GRPC_MDSTR_AUTHORITY,
+              GRPC_MDSTR_AUTHORITY,
               grpc_slice_intern(
                   grpc_slice_from_static_string(args->args[i].value.string)));
         }
@@ -191,25 +190,23 @@
   }
 
 done:
-  grpc_channel_args_destroy(exec_ctx, args);
+  grpc_channel_args_destroy(args);
   return channel;
 }
 
-grpc_channel* grpc_channel_create(grpc_exec_ctx* exec_ctx, const char* target,
+grpc_channel* grpc_channel_create(const char* target,
                                   const grpc_channel_args* input_args,
                                   grpc_channel_stack_type channel_stack_type,
                                   grpc_transport* optional_transport) {
   grpc_channel_stack_builder* builder = grpc_channel_stack_builder_create();
-  grpc_channel_stack_builder_set_channel_arguments(exec_ctx, builder,
-                                                   input_args);
+  grpc_channel_stack_builder_set_channel_arguments(builder, input_args);
   grpc_channel_stack_builder_set_target(builder, target);
   grpc_channel_stack_builder_set_transport(builder, optional_transport);
-  if (!grpc_channel_init_create_stack(exec_ctx, builder, channel_stack_type)) {
-    grpc_channel_stack_builder_destroy(exec_ctx, builder);
+  if (!grpc_channel_init_create_stack(builder, channel_stack_type)) {
+    grpc_channel_stack_builder_destroy(builder);
     return nullptr;
   }
-  return grpc_channel_create_with_builder(exec_ctx, builder,
-                                          channel_stack_type);
+  return grpc_channel_create_with_builder(builder, channel_stack_type);
 }
 
 size_t grpc_channel_get_call_size_estimate(grpc_channel* channel) {
@@ -251,18 +248,17 @@
 
 void grpc_channel_get_info(grpc_channel* channel,
                            const grpc_channel_info* channel_info) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_element* elem =
       grpc_channel_stack_element(CHANNEL_STACK_FROM_CHANNEL(channel), 0);
-  elem->filter->get_channel_info(&exec_ctx, elem, channel_info);
-  grpc_exec_ctx_finish(&exec_ctx);
+  elem->filter->get_channel_info(elem, channel_info);
 }
 
 static grpc_call* grpc_channel_create_call_internal(
-    grpc_exec_ctx* exec_ctx, grpc_channel* channel, grpc_call* parent_call,
-    uint32_t propagation_mask, grpc_completion_queue* cq,
-    grpc_pollset_set* pollset_set_alternative, grpc_mdelem path_mdelem,
-    grpc_mdelem authority_mdelem, grpc_millis deadline) {
+    grpc_channel* channel, grpc_call* parent_call, uint32_t propagation_mask,
+    grpc_completion_queue* cq, grpc_pollset_set* pollset_set_alternative,
+    grpc_mdelem path_mdelem, grpc_mdelem authority_mdelem,
+    grpc_millis deadline) {
   grpc_mdelem send_metadata[2];
   size_t num_metadata = 0;
 
@@ -289,7 +285,7 @@
   args.send_deadline = deadline;
 
   grpc_call* call;
-  GRPC_LOG_IF_ERROR("call_create", grpc_call_create(exec_ctx, &args, &call));
+  GRPC_LOG_IF_ERROR("call_create", grpc_call_create(&args, &call));
   return call;
 }
 
@@ -300,29 +296,27 @@
                                     grpc_slice method, const grpc_slice* host,
                                     gpr_timespec deadline, void* reserved) {
   GPR_ASSERT(!reserved);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_call* call = grpc_channel_create_call_internal(
-      &exec_ctx, channel, parent_call, propagation_mask, cq, nullptr,
-      grpc_mdelem_from_slices(&exec_ctx, GRPC_MDSTR_PATH,
-                              grpc_slice_ref_internal(method)),
-      host != nullptr ? grpc_mdelem_from_slices(&exec_ctx, GRPC_MDSTR_AUTHORITY,
+      channel, parent_call, propagation_mask, cq, nullptr,
+      grpc_mdelem_from_slices(GRPC_MDSTR_PATH, grpc_slice_ref_internal(method)),
+      host != nullptr ? grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                                 grpc_slice_ref_internal(*host))
                       : GRPC_MDNULL,
       grpc_timespec_to_millis_round_up(deadline));
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return call;
 }
 
 grpc_call* grpc_channel_create_pollset_set_call(
-    grpc_exec_ctx* exec_ctx, grpc_channel* channel, grpc_call* parent_call,
-    uint32_t propagation_mask, grpc_pollset_set* pollset_set, grpc_slice method,
-    const grpc_slice* host, grpc_millis deadline, void* reserved) {
+    grpc_channel* channel, grpc_call* parent_call, uint32_t propagation_mask,
+    grpc_pollset_set* pollset_set, grpc_slice method, const grpc_slice* host,
+    grpc_millis deadline, void* reserved) {
   GPR_ASSERT(!reserved);
   return grpc_channel_create_call_internal(
-      exec_ctx, channel, parent_call, propagation_mask, nullptr, pollset_set,
-      grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_PATH,
-                              grpc_slice_ref_internal(method)),
-      host != nullptr ? grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
+      channel, parent_call, propagation_mask, nullptr, pollset_set,
+      grpc_mdelem_from_slices(GRPC_MDSTR_PATH, grpc_slice_ref_internal(method)),
+      host != nullptr ? grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                                 grpc_slice_ref_internal(*host))
                       : GRPC_MDNULL,
       deadline);
@@ -335,21 +329,21 @@
       "grpc_channel_register_call(channel=%p, method=%s, host=%s, reserved=%p)",
       4, (channel, method, host, reserved));
   GPR_ASSERT(!reserved);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   rc->path = grpc_mdelem_from_slices(
-      &exec_ctx, GRPC_MDSTR_PATH,
+      GRPC_MDSTR_PATH,
       grpc_slice_intern(grpc_slice_from_static_string(method)));
   rc->authority =
       host ? grpc_mdelem_from_slices(
-                 &exec_ctx, GRPC_MDSTR_AUTHORITY,
+                 GRPC_MDSTR_AUTHORITY,
                  grpc_slice_intern(grpc_slice_from_static_string(host)))
            : GRPC_MDNULL;
   gpr_mu_lock(&channel->registered_call_mu);
   rc->next = channel->registered_calls;
   channel->registered_calls = rc;
   gpr_mu_unlock(&channel->registered_call_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return rc;
 }
 
@@ -370,12 +364,12 @@
        registered_call_handle, deadline.tv_sec, deadline.tv_nsec,
        (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_call* call = grpc_channel_create_call_internal(
-      &exec_ctx, channel, parent_call, propagation_mask, completion_queue,
-      nullptr, GRPC_MDELEM_REF(rc->path), GRPC_MDELEM_REF(rc->authority),
+      channel, parent_call, propagation_mask, completion_queue, nullptr,
+      GRPC_MDELEM_REF(rc->path), GRPC_MDELEM_REF(rc->authority),
       grpc_timespec_to_millis_round_up(deadline));
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return call;
 }
 
@@ -390,23 +384,21 @@
   GRPC_CHANNEL_STACK_REF(CHANNEL_STACK_FROM_CHANNEL(c), REF_REASON);
 }
 
-void grpc_channel_internal_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel* c REF_ARG) {
-  GRPC_CHANNEL_STACK_UNREF(exec_ctx, CHANNEL_STACK_FROM_CHANNEL(c), REF_REASON);
+void grpc_channel_internal_unref(grpc_channel* c REF_ARG) {
+  GRPC_CHANNEL_STACK_UNREF(CHANNEL_STACK_FROM_CHANNEL(c), REF_REASON);
 }
 
-static void destroy_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void destroy_channel(void* arg, grpc_error* error) {
   grpc_channel* channel = (grpc_channel*)arg;
-  grpc_channel_stack_destroy(exec_ctx, CHANNEL_STACK_FROM_CHANNEL(channel));
+  grpc_channel_stack_destroy(CHANNEL_STACK_FROM_CHANNEL(channel));
   while (channel->registered_calls) {
     registered_call* rc = channel->registered_calls;
     channel->registered_calls = rc->next;
-    GRPC_MDELEM_UNREF(exec_ctx, rc->path);
-    GRPC_MDELEM_UNREF(exec_ctx, rc->authority);
+    GRPC_MDELEM_UNREF(rc->path);
+    GRPC_MDELEM_UNREF(rc->authority);
     gpr_free(rc);
   }
-  GRPC_MDELEM_UNREF(exec_ctx, channel->default_authority);
+  GRPC_MDELEM_UNREF(channel->default_authority);
   gpr_mu_destroy(&channel->registered_call_mu);
   gpr_free(channel->target);
   gpr_free(channel);
@@ -415,16 +407,14 @@
 void grpc_channel_destroy(grpc_channel* channel) {
   grpc_transport_op* op = grpc_make_transport_op(nullptr);
   grpc_channel_element* elem;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GRPC_API_TRACE("grpc_channel_destroy(channel=%p)", 1, (channel));
   op->disconnect_with_error =
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel Destroyed");
   elem = grpc_channel_stack_element(CHANNEL_STACK_FROM_CHANNEL(channel), 0);
-  elem->filter->start_transport_op(&exec_ctx, elem, op);
+  elem->filter->start_transport_op(elem, op);
 
-  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, channel, "channel");
-
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CHANNEL_INTERNAL_UNREF(channel, "channel");
 }
 
 grpc_channel_stack* grpc_channel_get_channel_stack(grpc_channel* channel) {
@@ -436,8 +426,7 @@
   return channel->compression_options;
 }
 
-grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_exec_ctx* exec_ctx,
-                                                grpc_channel* channel, int i) {
+grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_channel* channel, int i) {
   char tmp[GPR_LTOA_MIN_BUFSIZE];
   switch (i) {
     case 0:
@@ -448,6 +437,6 @@
       return GRPC_MDELEM_GRPC_STATUS_2;
   }
   gpr_ltoa(i, tmp);
-  return grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_GRPC_STATUS,
+  return grpc_mdelem_from_slices(GRPC_MDSTR_GRPC_STATUS,
                                  grpc_slice_from_copied_string(tmp));
 }
diff --git a/src/core/lib/surface/channel.h b/src/core/lib/surface/channel.h
index a2e53c7..26d8fce 100644
--- a/src/core/lib/surface/channel.h
+++ b/src/core/lib/surface/channel.h
@@ -23,13 +23,13 @@
 #include "src/core/lib/channel/channel_stack_builder.h"
 #include "src/core/lib/surface/channel_stack_type.h"
 
-grpc_channel* grpc_channel_create(grpc_exec_ctx* exec_ctx, const char* target,
+grpc_channel* grpc_channel_create(const char* target,
                                   const grpc_channel_args* args,
                                   grpc_channel_stack_type channel_stack_type,
                                   grpc_transport* optional_transport);
 
 grpc_channel* grpc_channel_create_with_builder(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder,
+    grpc_channel_stack_builder* builder,
     grpc_channel_stack_type channel_stack_type);
 
 /** Create a call given a grpc_channel, in order to call \a method.
@@ -41,9 +41,9 @@
     properties from the server call to this new client call, depending on the
     value of \a propagation_mask (see propagation_bits.h for possible values) */
 grpc_call* grpc_channel_create_pollset_set_call(
-    grpc_exec_ctx* exec_ctx, grpc_channel* channel, grpc_call* parent_call,
-    uint32_t propagation_mask, grpc_pollset_set* pollset_set, grpc_slice method,
-    const grpc_slice* host, grpc_millis deadline, void* reserved);
+    grpc_channel* channel, grpc_call* parent_call, uint32_t propagation_mask,
+    grpc_pollset_set* pollset_set, grpc_slice method, const grpc_slice* host,
+    grpc_millis deadline, void* reserved);
 
 /** Get a (borrowed) pointer to this channels underlying channel stack */
 grpc_channel_stack* grpc_channel_get_channel_stack(grpc_channel* channel);
@@ -52,8 +52,7 @@
     status_code.
 
     The returned elem is owned by the caller. */
-grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_exec_ctx* exec_ctx,
-                                                grpc_channel* channel,
+grpc_mdelem grpc_channel_get_reffed_status_elem(grpc_channel* channel,
                                                 int status_code);
 
 size_t grpc_channel_get_call_size_estimate(grpc_channel* channel);
@@ -61,20 +60,18 @@
 
 #ifndef NDEBUG
 void grpc_channel_internal_ref(grpc_channel* channel, const char* reason);
-void grpc_channel_internal_unref(grpc_exec_ctx* exec_ctx, grpc_channel* channel,
-                                 const char* reason);
+void grpc_channel_internal_unref(grpc_channel* channel, const char* reason);
 #define GRPC_CHANNEL_INTERNAL_REF(channel, reason) \
   grpc_channel_internal_ref(channel, reason)
-#define GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel, reason) \
-  grpc_channel_internal_unref(exec_ctx, channel, reason)
+#define GRPC_CHANNEL_INTERNAL_UNREF(channel, reason) \
+  grpc_channel_internal_unref(channel, reason)
 #else
 void grpc_channel_internal_ref(grpc_channel* channel);
-void grpc_channel_internal_unref(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel* channel);
+void grpc_channel_internal_unref(grpc_channel* channel);
 #define GRPC_CHANNEL_INTERNAL_REF(channel, reason) \
   grpc_channel_internal_ref(channel)
-#define GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel, reason) \
-  grpc_channel_internal_unref(exec_ctx, channel)
+#define GRPC_CHANNEL_INTERNAL_UNREF(channel, reason) \
+  grpc_channel_internal_unref(channel)
 #endif
 
 /** Return the channel's compression options. */
diff --git a/src/core/lib/surface/channel_init.cc b/src/core/lib/surface/channel_init.cc
index b563537..95cbbbd 100644
--- a/src/core/lib/surface/channel_init.cc
+++ b/src/core/lib/surface/channel_init.cc
@@ -89,8 +89,7 @@
   }
 }
 
-bool grpc_channel_init_create_stack(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_stack_builder* builder,
+bool grpc_channel_init_create_stack(grpc_channel_stack_builder* builder,
                                     grpc_channel_stack_type type) {
   GPR_ASSERT(g_finalized);
 
@@ -99,7 +98,7 @@
 
   for (size_t i = 0; i < g_slots[type].num_slots; i++) {
     const stage_slot* slot = &g_slots[type].slots[i];
-    if (!slot->fn(exec_ctx, builder, slot->arg)) {
+    if (!slot->fn(builder, slot->arg)) {
       return false;
     }
   }
diff --git a/src/core/lib/surface/channel_init.h b/src/core/lib/surface/channel_init.h
index 556ecc4..d702f0f 100644
--- a/src/core/lib/surface/channel_init.h
+++ b/src/core/lib/surface/channel_init.h
@@ -32,8 +32,7 @@
 
 /// One stage of mutation: call functions against \a builder to influence the
 /// finally constructed channel stack
-typedef bool (*grpc_channel_init_stage)(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_stack_builder* builder,
+typedef bool (*grpc_channel_init_stage)(grpc_channel_stack_builder* builder,
                                         void* arg);
 
 /// Global initialization of the system
@@ -66,8 +65,7 @@
 /// \a optional_transport is either NULL or a constructed transport object
 /// Returns a pointer to the base of the memory allocated (the actual channel
 /// stack object will be prefix_bytes past that pointer)
-bool grpc_channel_init_create_stack(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_stack_builder* builder,
+bool grpc_channel_init_create_stack(grpc_channel_stack_builder* builder,
                                     grpc_channel_stack_type type);
 
 #endif /* GRPC_CORE_LIB_SURFACE_CHANNEL_INIT_H */
diff --git a/src/core/lib/surface/channel_ping.cc b/src/core/lib/surface/channel_ping.cc
index e8f47f0..a030d8d 100644
--- a/src/core/lib/surface/channel_ping.cc
+++ b/src/core/lib/surface/channel_ping.cc
@@ -33,15 +33,14 @@
   grpc_cq_completion completion_storage;
 } ping_result;
 
-static void ping_destroy(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_cq_completion* storage) {
+static void ping_destroy(void* arg, grpc_cq_completion* storage) {
   gpr_free(arg);
 }
 
-static void ping_done(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void ping_done(void* arg, grpc_error* error) {
   ping_result* pr = (ping_result*)arg;
-  grpc_cq_end_op(exec_ctx, pr->cq, pr->tag, GRPC_ERROR_REF(error), ping_destroy,
-                 pr, &pr->completion_storage);
+  grpc_cq_end_op(pr->cq, pr->tag, GRPC_ERROR_REF(error), ping_destroy, pr,
+                 &pr->completion_storage);
 }
 
 void grpc_channel_ping(grpc_channel* channel, grpc_completion_queue* cq,
@@ -52,14 +51,13 @@
   ping_result* pr = (ping_result*)gpr_malloc(sizeof(*pr));
   grpc_channel_element* top_elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GPR_ASSERT(reserved == nullptr);
   pr->tag = tag;
   pr->cq = cq;
   GRPC_CLOSURE_INIT(&pr->closure, ping_done, pr, grpc_schedule_on_exec_ctx);
-  op->send_ping = &pr->closure;
+  op->send_ping.on_ack = &pr->closure;
   op->bind_pollset = grpc_cq_pollset(cq);
   GPR_ASSERT(grpc_cq_begin_op(cq, tag));
-  top_elem->filter->start_transport_op(&exec_ctx, top_elem, op);
-  grpc_exec_ctx_finish(&exec_ctx);
+  top_elem->filter->start_transport_op(top_elem, op);
 }
diff --git a/src/core/lib/surface/completion_queue.cc b/src/core/lib/surface/completion_queue.cc
index dfb5b5b..aa5808d 100644
--- a/src/core/lib/surface/completion_queue.cc
+++ b/src/core/lib/surface/completion_queue.cc
@@ -62,13 +62,12 @@
   bool can_listen;
   size_t (*size)(void);
   void (*init)(grpc_pollset* pollset, gpr_mu** mu);
-  grpc_error* (*kick)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
+  grpc_error* (*kick)(grpc_pollset* pollset,
                       grpc_pollset_worker* specific_worker);
-  grpc_error* (*work)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                      grpc_pollset_worker** worker, grpc_millis deadline);
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-                   grpc_closure* closure);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_pollset* pollset);
+  grpc_error* (*work)(grpc_pollset* pollset, grpc_pollset_worker** worker,
+                      grpc_millis deadline);
+  void (*shutdown)(grpc_pollset* pollset, grpc_closure* closure);
+  void (*destroy)(grpc_pollset* pollset);
 } cq_poller_vtable;
 
 typedef struct non_polling_worker {
@@ -94,14 +93,12 @@
   *mu = &npp->mu;
 }
 
-static void non_polling_poller_destroy(grpc_exec_ctx* exec_ctx,
-                                       grpc_pollset* pollset) {
+static void non_polling_poller_destroy(grpc_pollset* pollset) {
   non_polling_poller* npp = (non_polling_poller*)pollset;
   gpr_mu_destroy(&npp->mu);
 }
 
-static grpc_error* non_polling_poller_work(grpc_exec_ctx* exec_ctx,
-                                           grpc_pollset* pollset,
+static grpc_error* non_polling_poller_work(grpc_pollset* pollset,
                                            grpc_pollset_worker** worker,
                                            grpc_millis deadline) {
   non_polling_poller* npp = (non_polling_poller*)pollset;
@@ -122,12 +119,12 @@
   while (!npp->shutdown && !w.kicked &&
          !gpr_cv_wait(&w.cv, &npp->mu, deadline_ts))
     ;
-  grpc_exec_ctx_invalidate_now(exec_ctx);
+  grpc_core::ExecCtx::Get()->InvalidateNow();
   if (&w == npp->root) {
     npp->root = w.next;
     if (&w == npp->root) {
       if (npp->shutdown) {
-        GRPC_CLOSURE_SCHED(exec_ctx, npp->shutdown, GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(npp->shutdown, GRPC_ERROR_NONE);
       }
       npp->root = nullptr;
     }
@@ -140,8 +137,7 @@
 }
 
 static grpc_error* non_polling_poller_kick(
-    grpc_exec_ctx* exec_ctx, grpc_pollset* pollset,
-    grpc_pollset_worker* specific_worker) {
+    grpc_pollset* pollset, grpc_pollset_worker* specific_worker) {
   non_polling_poller* p = (non_polling_poller*)pollset;
   if (specific_worker == nullptr)
     specific_worker = (grpc_pollset_worker*)p->root;
@@ -155,14 +151,13 @@
   return GRPC_ERROR_NONE;
 }
 
-static void non_polling_poller_shutdown(grpc_exec_ctx* exec_ctx,
-                                        grpc_pollset* pollset,
+static void non_polling_poller_shutdown(grpc_pollset* pollset,
                                         grpc_closure* closure) {
   non_polling_poller* p = (non_polling_poller*)pollset;
   GPR_ASSERT(closure != nullptr);
   p->shutdown = closure;
   if (p->root == nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
   } else {
     non_polling_worker* w = p->root;
     do {
@@ -189,13 +184,11 @@
   grpc_cq_completion_type cq_completion_type;
   size_t data_size;
   void (*init)(void* data);
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq);
+  void (*shutdown)(grpc_completion_queue* cq);
   void (*destroy)(void* data);
   bool (*begin_op)(grpc_completion_queue* cq, void* tag);
-  void (*end_op)(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq, void* tag,
-                 grpc_error* error,
-                 void (*done)(grpc_exec_ctx* exec_ctx, void* done_arg,
-                              grpc_cq_completion* storage),
+  void (*end_op)(grpc_completion_queue* cq, void* tag, grpc_error* error,
+                 void (*done)(void* done_arg, grpc_cq_completion* storage),
                  void* done_arg, grpc_cq_completion* storage);
   grpc_event (*next)(grpc_completion_queue* cq, gpr_timespec deadline,
                      void* reserved);
@@ -280,31 +273,23 @@
 };
 
 /* Forward declarations */
-static void cq_finish_shutdown_next(grpc_exec_ctx* exec_ctx,
-                                    grpc_completion_queue* cq);
-static void cq_finish_shutdown_pluck(grpc_exec_ctx* exec_ctx,
-                                     grpc_completion_queue* cq);
-static void cq_shutdown_next(grpc_exec_ctx* exec_ctx,
-                             grpc_completion_queue* cq);
-static void cq_shutdown_pluck(grpc_exec_ctx* exec_ctx,
-                              grpc_completion_queue* cq);
+static void cq_finish_shutdown_next(grpc_completion_queue* cq);
+static void cq_finish_shutdown_pluck(grpc_completion_queue* cq);
+static void cq_shutdown_next(grpc_completion_queue* cq);
+static void cq_shutdown_pluck(grpc_completion_queue* cq);
 
 static bool cq_begin_op_for_next(grpc_completion_queue* cq, void* tag);
 static bool cq_begin_op_for_pluck(grpc_completion_queue* cq, void* tag);
 
-static void cq_end_op_for_next(grpc_exec_ctx* exec_ctx,
-                               grpc_completion_queue* cq, void* tag,
+static void cq_end_op_for_next(grpc_completion_queue* cq, void* tag,
                                grpc_error* error,
-                               void (*done)(grpc_exec_ctx* exec_ctx,
-                                            void* done_arg,
+                               void (*done)(void* done_arg,
                                             grpc_cq_completion* storage),
                                void* done_arg, grpc_cq_completion* storage);
 
-static void cq_end_op_for_pluck(grpc_exec_ctx* exec_ctx,
-                                grpc_completion_queue* cq, void* tag,
+static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
                                 grpc_error* error,
-                                void (*done)(grpc_exec_ctx* exec_ctx,
-                                             void* done_arg,
+                                void (*done)(void* done_arg,
                                              grpc_cq_completion* storage),
                                 void* done_arg, grpc_cq_completion* storage);
 
@@ -346,8 +331,7 @@
     gpr_free(_ev);                                                         \
   }
 
-static void on_pollset_shutdown_done(grpc_exec_ctx* exec_ctx, void* cq,
-                                     grpc_error* error);
+static void on_pollset_shutdown_done(void* cq, grpc_error* error);
 
 void grpc_cq_global_init() {
   gpr_tls_init(&g_cached_event);
@@ -369,19 +353,18 @@
   if (storage != nullptr &&
       (grpc_completion_queue*)gpr_tls_get(&g_cached_cq) == cq) {
     *tag = storage->tag;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     *ok = (storage->next & (uintptr_t)(1)) == 1;
-    storage->done(&exec_ctx, storage->done_arg, storage);
+    storage->done(storage->done_arg, storage);
     ret = 1;
     cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
     if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
       GRPC_CQ_INTERNAL_REF(cq, "shutting_down");
       gpr_mu_lock(cq->mu);
-      cq_finish_shutdown_next(&exec_ctx, cq);
+      cq_finish_shutdown_next(cq);
       gpr_mu_unlock(cq->mu);
-      GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cq, "shutting_down");
+      GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
     }
-    grpc_exec_ctx_finish(&exec_ctx);
   }
   gpr_tls_set(&g_cached_event, (intptr_t)0);
   gpr_tls_set(&g_cached_cq, (intptr_t)0);
@@ -406,24 +389,22 @@
 
 static grpc_cq_completion* cq_event_queue_pop(grpc_cq_event_queue* q) {
   grpc_cq_completion* c = nullptr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   if (gpr_spinlock_trylock(&q->queue_lock)) {
-    GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES(&exec_ctx);
+    GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES();
 
     bool is_empty = false;
     c = (grpc_cq_completion*)gpr_mpscq_pop_and_check_end(&q->queue, &is_empty);
     gpr_spinlock_unlock(&q->queue_lock);
 
     if (c == nullptr && !is_empty) {
-      GRPC_STATS_INC_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES(&exec_ctx);
+      GRPC_STATS_INC_CQ_EV_QUEUE_TRANSIENT_POP_FAILURES();
     }
   } else {
-    GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_FAILURES(&exec_ctx);
+    GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_FAILURES();
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
-
   if (c) {
     gpr_atm_no_barrier_fetch_add(&q->num_queue_items, -1);
   }
@@ -453,9 +434,8 @@
   const cq_poller_vtable* poller_vtable =
       &g_poller_vtable_by_poller_type[polling_type];
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_STATS_INC_CQS_CREATED(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_STATS_INC_CQS_CREATED();
 
   cq = (grpc_completion_queue*)gpr_zalloc(sizeof(grpc_completion_queue) +
                                           vtable->data_size +
@@ -537,15 +517,14 @@
   gpr_ref(&cq->owning_refs);
 }
 
-static void on_pollset_shutdown_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void on_pollset_shutdown_done(void* arg, grpc_error* error) {
   grpc_completion_queue* cq = (grpc_completion_queue*)arg;
-  GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "pollset_destroy");
+  GRPC_CQ_INTERNAL_UNREF(cq, "pollset_destroy");
 }
 
 #ifndef NDEBUG
-void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq,
-                            const char* reason, const char* file, int line) {
+void grpc_cq_internal_unref(grpc_completion_queue* cq, const char* reason,
+                            const char* file, int line) {
   if (grpc_trace_cq_refcount.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&cq->owning_refs.count);
     gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
@@ -553,12 +532,11 @@
             reason);
   }
 #else
-void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx,
-                            grpc_completion_queue* cq) {
+void grpc_cq_internal_unref(grpc_completion_queue* cq) {
 #endif
   if (gpr_unref(&cq->owning_refs)) {
     cq->vtable->destroy(DATA_FROM_CQ(cq));
-    cq->poller_vtable->destroy(exec_ctx, POLLSET_FROM_CQ(cq));
+    cq->poller_vtable->destroy(POLLSET_FROM_CQ(cq));
 #ifndef NDEBUG
     gpr_free(cq->outstanding_tags);
 #endif
@@ -639,11 +617,9 @@
 /* Queue a GRPC_OP_COMPLETED operation to a completion queue (with a
  * completion
  * type of GRPC_CQ_NEXT) */
-static void cq_end_op_for_next(grpc_exec_ctx* exec_ctx,
-                               grpc_completion_queue* cq, void* tag,
+static void cq_end_op_for_next(grpc_completion_queue* cq, void* tag,
                                grpc_error* error,
-                               void (*done)(grpc_exec_ctx* exec_ctx,
-                                            void* done_arg,
+                               void (*done)(void* done_arg,
                                             grpc_cq_completion* storage),
                                void* done_arg, grpc_cq_completion* storage) {
   GPR_TIMER_BEGIN("cq_end_op_for_next", 0);
@@ -652,9 +628,9 @@
       (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE)) {
     const char* errmsg = grpc_error_string(error);
     GRPC_API_TRACE(
-        "cq_end_op_for_next(exec_ctx=%p, cq=%p, tag=%p, error=%s, "
+        "cq_end_op_for_next(cq=%p, tag=%p, error=%s, "
         "done=%p, done_arg=%p, storage=%p)",
-        7, (exec_ctx, cq, tag, errmsg, done, done_arg, storage));
+        6, (cq, tag, errmsg, done, done_arg, storage));
     if (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE) {
       gpr_log(GPR_ERROR, "Operation failed: tag=%p, error=%s", tag, errmsg);
     }
@@ -689,7 +665,7 @@
       if (is_first) {
         gpr_mu_lock(cq->mu);
         grpc_error* kick_error =
-            cq->poller_vtable->kick(exec_ctx, POLLSET_FROM_CQ(cq), nullptr);
+            cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), nullptr);
         gpr_mu_unlock(cq->mu);
 
         if (kick_error != GRPC_ERROR_NONE) {
@@ -701,17 +677,17 @@
       if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
         GRPC_CQ_INTERNAL_REF(cq, "shutting_down");
         gpr_mu_lock(cq->mu);
-        cq_finish_shutdown_next(exec_ctx, cq);
+        cq_finish_shutdown_next(cq);
         gpr_mu_unlock(cq->mu);
-        GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down");
+        GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
       }
     } else {
       GRPC_CQ_INTERNAL_REF(cq, "shutting_down");
       gpr_atm_rel_store(&cqd->pending_events, 0);
       gpr_mu_lock(cq->mu);
-      cq_finish_shutdown_next(exec_ctx, cq);
+      cq_finish_shutdown_next(cq);
       gpr_mu_unlock(cq->mu);
-      GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down");
+      GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
     }
   }
 
@@ -723,11 +699,9 @@
 /* Queue a GRPC_OP_COMPLETED operation to a completion queue (with a
  * completion
  * type of GRPC_CQ_PLUCK) */
-static void cq_end_op_for_pluck(grpc_exec_ctx* exec_ctx,
-                                grpc_completion_queue* cq, void* tag,
+static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
                                 grpc_error* error,
-                                void (*done)(grpc_exec_ctx* exec_ctx,
-                                             void* done_arg,
+                                void (*done)(void* done_arg,
                                              grpc_cq_completion* storage),
                                 void* done_arg, grpc_cq_completion* storage) {
   cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
@@ -739,9 +713,9 @@
       (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE)) {
     const char* errmsg = grpc_error_string(error);
     GRPC_API_TRACE(
-        "cq_end_op_for_pluck(exec_ctx=%p, cq=%p, tag=%p, error=%s, "
+        "cq_end_op_for_pluck(cq=%p, tag=%p, error=%s, "
         "done=%p, done_arg=%p, storage=%p)",
-        7, (exec_ctx, cq, tag, errmsg, done, done_arg, storage));
+        6, (cq, tag, errmsg, done, done_arg, storage));
     if (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE) {
       gpr_log(GPR_ERROR, "Operation failed: tag=%p, error=%s", tag, errmsg);
     }
@@ -762,7 +736,7 @@
   cqd->completed_tail = storage;
 
   if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
-    cq_finish_shutdown_pluck(exec_ctx, cq);
+    cq_finish_shutdown_pluck(cq);
     gpr_mu_unlock(cq->mu);
   } else {
     grpc_pollset_worker* pluck_worker = nullptr;
@@ -774,7 +748,7 @@
     }
 
     grpc_error* kick_error =
-        cq->poller_vtable->kick(exec_ctx, POLLSET_FROM_CQ(cq), pluck_worker);
+        cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), pluck_worker);
 
     gpr_mu_unlock(cq->mu);
 
@@ -791,12 +765,10 @@
   GRPC_ERROR_UNREF(error);
 }
 
-void grpc_cq_end_op(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cq,
-                    void* tag, grpc_error* error,
-                    void (*done)(grpc_exec_ctx* exec_ctx, void* done_arg,
-                                 grpc_cq_completion* storage),
+void grpc_cq_end_op(grpc_completion_queue* cq, void* tag, grpc_error* error,
+                    void (*done)(void* done_arg, grpc_cq_completion* storage),
                     void* done_arg, grpc_cq_completion* storage) {
-  cq->vtable->end_op(exec_ctx, cq, tag, error, done, done_arg, storage);
+  cq->vtable->end_op(cq, tag, error, done, done_arg, storage);
 }
 
 typedef struct {
@@ -808,31 +780,40 @@
   bool first_loop;
 } cq_is_finished_arg;
 
-static bool cq_is_next_finished(grpc_exec_ctx* exec_ctx, void* arg) {
-  cq_is_finished_arg* a = (cq_is_finished_arg*)arg;
-  grpc_completion_queue* cq = a->cq;
-  cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
-  GPR_ASSERT(a->stolen_completion == nullptr);
+class ExecCtxNext : public grpc_core::ExecCtx {
+ public:
+  ExecCtxNext(void* arg) : ExecCtx(0), check_ready_to_finish_arg_(arg) {}
 
-  gpr_atm current_last_seen_things_queued_ever =
-      gpr_atm_no_barrier_load(&cqd->things_queued_ever);
+  bool CheckReadyToFinish() override {
+    cq_is_finished_arg* a = (cq_is_finished_arg*)check_ready_to_finish_arg_;
+    grpc_completion_queue* cq = a->cq;
+    cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+    GPR_ASSERT(a->stolen_completion == nullptr);
 
-  if (current_last_seen_things_queued_ever != a->last_seen_things_queued_ever) {
-    a->last_seen_things_queued_ever =
+    gpr_atm current_last_seen_things_queued_ever =
         gpr_atm_no_barrier_load(&cqd->things_queued_ever);
 
-    /* Pop a cq_completion from the queue. Returns NULL if the queue is empty
-     * might return NULL in some cases even if the queue is not empty; but
-     * that
-     * is ok and doesn't affect correctness. Might effect the tail latencies a
-     * bit) */
-    a->stolen_completion = cq_event_queue_pop(&cqd->queue);
-    if (a->stolen_completion != nullptr) {
-      return true;
+    if (current_last_seen_things_queued_ever !=
+        a->last_seen_things_queued_ever) {
+      a->last_seen_things_queued_ever =
+          gpr_atm_no_barrier_load(&cqd->things_queued_ever);
+
+      /* Pop a cq_completion from the queue. Returns NULL if the queue is empty
+       * might return NULL in some cases even if the queue is not empty; but
+       * that
+       * is ok and doesn't affect correctness. Might effect the tail latencies a
+       * bit) */
+      a->stolen_completion = cq_event_queue_pop(&cqd->queue);
+      if (a->stolen_completion != nullptr) {
+        return true;
+      }
     }
+    return !a->first_loop && a->deadline < grpc_core::ExecCtx::Get()->Now();
   }
-  return !a->first_loop && a->deadline < grpc_exec_ctx_now(exec_ctx);
-}
+
+ private:
+  void* check_ready_to_finish_arg_;
+};
 
 #ifndef NDEBUG
 static void dump_pending_tags(grpc_completion_queue* cq) {
@@ -887,8 +868,7 @@
       nullptr,
       nullptr,
       true};
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, cq_is_next_finished, &is_finished_arg);
+  ExecCtxNext exec_ctx(&is_finished_arg);
   for (;;) {
     grpc_millis iteration_deadline = deadline_millis;
 
@@ -898,7 +878,7 @@
       ret.type = GRPC_OP_COMPLETE;
       ret.success = c->next & 1u;
       ret.tag = c->tag;
-      c->done(&exec_ctx, c->done_arg, c);
+      c->done(c->done_arg, c);
       break;
     }
 
@@ -908,7 +888,7 @@
       ret.type = GRPC_OP_COMPLETE;
       ret.success = c->next & 1u;
       ret.tag = c->tag;
-      c->done(&exec_ctx, c->done_arg, c);
+      c->done(c->done_arg, c);
       break;
     } else {
       /* If c == NULL it means either the queue is empty OR in an transient
@@ -939,7 +919,7 @@
     }
 
     if (!is_finished_arg.first_loop &&
-        grpc_exec_ctx_now(&exec_ctx) >= deadline_millis) {
+        grpc_core::ExecCtx::Get()->Now() >= deadline_millis) {
       memset(&ret, 0, sizeof(ret));
       ret.type = GRPC_QUEUE_TIMEOUT;
       dump_pending_tags(cq);
@@ -949,8 +929,8 @@
     /* The main polling work happens in grpc_pollset_work */
     gpr_mu_lock(cq->mu);
     cq->num_polls++;
-    grpc_error* err = cq->poller_vtable->work(&exec_ctx, POLLSET_FROM_CQ(cq),
-                                              nullptr, iteration_deadline);
+    grpc_error* err = cq->poller_vtable->work(POLLSET_FROM_CQ(cq), nullptr,
+                                              iteration_deadline);
     gpr_mu_unlock(cq->mu);
 
     if (err != GRPC_ERROR_NONE) {
@@ -969,13 +949,13 @@
   if (cq_event_queue_num_items(&cqd->queue) > 0 &&
       gpr_atm_acq_load(&cqd->pending_events) > 0) {
     gpr_mu_lock(cq->mu);
-    cq->poller_vtable->kick(&exec_ctx, POLLSET_FROM_CQ(cq), nullptr);
+    cq->poller_vtable->kick(POLLSET_FROM_CQ(cq), nullptr);
     gpr_mu_unlock(cq->mu);
   }
 
   GRPC_SURFACE_TRACE_RETURNED_EVENT(cq, &ret);
-  GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cq, "next");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CQ_INTERNAL_UNREF(cq, "next");
+
   GPR_ASSERT(is_finished_arg.stolen_completion == nullptr);
 
   GPR_TIMER_END("grpc_completion_queue_next", 0);
@@ -989,19 +969,16 @@
    - Must be called only once in completion queue's lifetime
    - grpc_completion_queue_shutdown() MUST have been called before calling
    this function */
-static void cq_finish_shutdown_next(grpc_exec_ctx* exec_ctx,
-                                    grpc_completion_queue* cq) {
+static void cq_finish_shutdown_next(grpc_completion_queue* cq) {
   cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
 
   GPR_ASSERT(cqd->shutdown_called);
   GPR_ASSERT(gpr_atm_no_barrier_load(&cqd->pending_events) == 0);
 
-  cq->poller_vtable->shutdown(exec_ctx, POLLSET_FROM_CQ(cq),
-                              &cq->pollset_shutdown_done);
+  cq->poller_vtable->shutdown(POLLSET_FROM_CQ(cq), &cq->pollset_shutdown_done);
 }
 
-static void cq_shutdown_next(grpc_exec_ctx* exec_ctx,
-                             grpc_completion_queue* cq) {
+static void cq_shutdown_next(grpc_completion_queue* cq) {
   cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
 
   /* Need an extra ref for cq here because:
@@ -1014,7 +991,7 @@
   gpr_mu_lock(cq->mu);
   if (cqd->shutdown_called) {
     gpr_mu_unlock(cq->mu);
-    GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down");
+    GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
     return;
   }
   cqd->shutdown_called = true;
@@ -1022,10 +999,10 @@
    * cq_begin_op_for_next and and cq_end_op_for_next functions which read/write
    * on this counter without necessarily holding a lock on cq */
   if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
-    cq_finish_shutdown_next(exec_ctx, cq);
+    cq_finish_shutdown_next(cq);
   }
   gpr_mu_unlock(cq->mu);
-  GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down");
+  GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down");
 }
 
 grpc_event grpc_completion_queue_next(grpc_completion_queue* cq,
@@ -1058,37 +1035,46 @@
   GPR_UNREACHABLE_CODE(return );
 }
 
-static bool cq_is_pluck_finished(grpc_exec_ctx* exec_ctx, void* arg) {
-  cq_is_finished_arg* a = (cq_is_finished_arg*)arg;
-  grpc_completion_queue* cq = a->cq;
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+class ExecCtxPluck : public grpc_core::ExecCtx {
+ public:
+  ExecCtxPluck(void* arg) : ExecCtx(0), check_ready_to_finish_arg_(arg) {}
 
-  GPR_ASSERT(a->stolen_completion == nullptr);
-  gpr_atm current_last_seen_things_queued_ever =
-      gpr_atm_no_barrier_load(&cqd->things_queued_ever);
-  if (current_last_seen_things_queued_ever != a->last_seen_things_queued_ever) {
-    gpr_mu_lock(cq->mu);
-    a->last_seen_things_queued_ever =
+  bool CheckReadyToFinish() override {
+    cq_is_finished_arg* a = (cq_is_finished_arg*)check_ready_to_finish_arg_;
+    grpc_completion_queue* cq = a->cq;
+    cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+
+    GPR_ASSERT(a->stolen_completion == nullptr);
+    gpr_atm current_last_seen_things_queued_ever =
         gpr_atm_no_barrier_load(&cqd->things_queued_ever);
-    grpc_cq_completion* c;
-    grpc_cq_completion* prev = &cqd->completed_head;
-    while ((c = (grpc_cq_completion*)(prev->next & ~(uintptr_t)1)) !=
-           &cqd->completed_head) {
-      if (c->tag == a->tag) {
-        prev->next = (prev->next & (uintptr_t)1) | (c->next & ~(uintptr_t)1);
-        if (c == cqd->completed_tail) {
-          cqd->completed_tail = prev;
+    if (current_last_seen_things_queued_ever !=
+        a->last_seen_things_queued_ever) {
+      gpr_mu_lock(cq->mu);
+      a->last_seen_things_queued_ever =
+          gpr_atm_no_barrier_load(&cqd->things_queued_ever);
+      grpc_cq_completion* c;
+      grpc_cq_completion* prev = &cqd->completed_head;
+      while ((c = (grpc_cq_completion*)(prev->next & ~(uintptr_t)1)) !=
+             &cqd->completed_head) {
+        if (c->tag == a->tag) {
+          prev->next = (prev->next & (uintptr_t)1) | (c->next & ~(uintptr_t)1);
+          if (c == cqd->completed_tail) {
+            cqd->completed_tail = prev;
+          }
+          gpr_mu_unlock(cq->mu);
+          a->stolen_completion = c;
+          return true;
         }
-        gpr_mu_unlock(cq->mu);
-        a->stolen_completion = c;
-        return true;
+        prev = c;
       }
-      prev = c;
+      gpr_mu_unlock(cq->mu);
     }
-    gpr_mu_unlock(cq->mu);
+    return !a->first_loop && a->deadline < grpc_core::ExecCtx::Get()->Now();
   }
-  return !a->first_loop && a->deadline < grpc_exec_ctx_now(exec_ctx);
-}
+
+ private:
+  void* check_ready_to_finish_arg_;
+};
 
 static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
                            gpr_timespec deadline, void* reserved) {
@@ -1125,8 +1111,7 @@
       nullptr,
       tag,
       true};
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, cq_is_pluck_finished, &is_finished_arg);
+  ExecCtxPluck exec_ctx(&is_finished_arg);
   for (;;) {
     if (is_finished_arg.stolen_completion != nullptr) {
       gpr_mu_unlock(cq->mu);
@@ -1135,7 +1120,7 @@
       ret.type = GRPC_OP_COMPLETE;
       ret.success = c->next & 1u;
       ret.tag = c->tag;
-      c->done(&exec_ctx, c->done_arg, c);
+      c->done(c->done_arg, c);
       break;
     }
     prev = &cqd->completed_head;
@@ -1150,7 +1135,7 @@
         ret.type = GRPC_OP_COMPLETE;
         ret.success = c->next & 1u;
         ret.tag = c->tag;
-        c->done(&exec_ctx, c->done_arg, c);
+        c->done(c->done_arg, c);
         goto done;
       }
       prev = c;
@@ -1174,7 +1159,7 @@
       break;
     }
     if (!is_finished_arg.first_loop &&
-        grpc_exec_ctx_now(&exec_ctx) >= deadline_millis) {
+        grpc_core::ExecCtx::Get()->Now() >= deadline_millis) {
       del_plucker(cq, tag, &worker);
       gpr_mu_unlock(cq->mu);
       memset(&ret, 0, sizeof(ret));
@@ -1183,8 +1168,8 @@
       break;
     }
     cq->num_polls++;
-    grpc_error* err = cq->poller_vtable->work(&exec_ctx, POLLSET_FROM_CQ(cq),
-                                              &worker, deadline_millis);
+    grpc_error* err =
+        cq->poller_vtable->work(POLLSET_FROM_CQ(cq), &worker, deadline_millis);
     if (err != GRPC_ERROR_NONE) {
       del_plucker(cq, tag, &worker);
       gpr_mu_unlock(cq->mu);
@@ -1202,8 +1187,8 @@
   }
 done:
   GRPC_SURFACE_TRACE_RETURNED_EVENT(cq, &ret);
-  GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cq, "pluck");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_CQ_INTERNAL_UNREF(cq, "pluck");
+
   GPR_ASSERT(is_finished_arg.stolen_completion == nullptr);
 
   GPR_TIMER_END("grpc_completion_queue_pluck", 0);
@@ -1216,22 +1201,19 @@
   return cq->vtable->pluck(cq, tag, deadline, reserved);
 }
 
-static void cq_finish_shutdown_pluck(grpc_exec_ctx* exec_ctx,
-                                     grpc_completion_queue* cq) {
+static void cq_finish_shutdown_pluck(grpc_completion_queue* cq) {
   cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
 
   GPR_ASSERT(cqd->shutdown_called);
   GPR_ASSERT(!gpr_atm_no_barrier_load(&cqd->shutdown));
   gpr_atm_no_barrier_store(&cqd->shutdown, 1);
 
-  cq->poller_vtable->shutdown(exec_ctx, POLLSET_FROM_CQ(cq),
-                              &cq->pollset_shutdown_done);
+  cq->poller_vtable->shutdown(POLLSET_FROM_CQ(cq), &cq->pollset_shutdown_done);
 }
 
 /* NOTE: This function is almost exactly identical to cq_shutdown_next() but
  * merging them is a bit tricky and probably not worth it */
-static void cq_shutdown_pluck(grpc_exec_ctx* exec_ctx,
-                              grpc_completion_queue* cq) {
+static void cq_shutdown_pluck(grpc_completion_queue* cq) {
   cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
 
   /* Need an extra ref for cq here because:
@@ -1244,25 +1226,25 @@
   gpr_mu_lock(cq->mu);
   if (cqd->shutdown_called) {
     gpr_mu_unlock(cq->mu);
-    GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down (pluck cq)");
+    GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down (pluck cq)");
     return;
   }
   cqd->shutdown_called = true;
   if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
-    cq_finish_shutdown_pluck(exec_ctx, cq);
+    cq_finish_shutdown_pluck(cq);
   }
   gpr_mu_unlock(cq->mu);
-  GRPC_CQ_INTERNAL_UNREF(exec_ctx, cq, "shutting_down (pluck cq)");
+  GRPC_CQ_INTERNAL_UNREF(cq, "shutting_down (pluck cq)");
 }
 
 /* Shutdown simply drops a ref that we reserved at creation time; if we drop
    to zero here, then enter shutdown mode and wake up any waiters */
 void grpc_completion_queue_shutdown(grpc_completion_queue* cq) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   GPR_TIMER_BEGIN("grpc_completion_queue_shutdown", 0);
   GRPC_API_TRACE("grpc_completion_queue_shutdown(cq=%p)", 1, (cq));
-  cq->vtable->shutdown(&exec_ctx, cq);
-  grpc_exec_ctx_finish(&exec_ctx);
+  cq->vtable->shutdown(cq);
+
   GPR_TIMER_END("grpc_completion_queue_shutdown", 0);
 }
 
@@ -1271,9 +1253,9 @@
   GPR_TIMER_BEGIN("grpc_completion_queue_destroy", 0);
   grpc_completion_queue_shutdown(cq);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cq, "destroy");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CQ_INTERNAL_UNREF(cq, "destroy");
+
   GPR_TIMER_END("grpc_completion_queue_destroy", 0);
 }
 
diff --git a/src/core/lib/surface/completion_queue.h b/src/core/lib/surface/completion_queue.h
index 13d3e58..aea47af 100644
--- a/src/core/lib/surface/completion_queue.h
+++ b/src/core/lib/surface/completion_queue.h
@@ -40,8 +40,7 @@
   void* tag;
   /** done callback - called when this queue element is no longer
       needed by the completion queue */
-  void (*done)(grpc_exec_ctx* exec_ctx, void* done_arg,
-               struct grpc_cq_completion* c);
+  void (*done)(void* done_arg, struct grpc_cq_completion* c);
   void* done_arg;
   /** next pointer; low bit is used to indicate success or not */
   uintptr_t next;
@@ -50,17 +49,17 @@
 #ifndef NDEBUG
 void grpc_cq_internal_ref(grpc_completion_queue* cc, const char* reason,
                           const char* file, int line);
-void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cc,
-                            const char* reason, const char* file, int line);
+void grpc_cq_internal_unref(grpc_completion_queue* cc, const char* reason,
+                            const char* file, int line);
 #define GRPC_CQ_INTERNAL_REF(cc, reason) \
   grpc_cq_internal_ref(cc, reason, __FILE__, __LINE__)
-#define GRPC_CQ_INTERNAL_UNREF(ec, cc, reason) \
-  grpc_cq_internal_unref(ec, cc, reason, __FILE__, __LINE__)
+#define GRPC_CQ_INTERNAL_UNREF(cc, reason) \
+  grpc_cq_internal_unref(cc, reason, __FILE__, __LINE__)
 #else
 void grpc_cq_internal_ref(grpc_completion_queue* cc);
-void grpc_cq_internal_unref(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cc);
+void grpc_cq_internal_unref(grpc_completion_queue* cc);
 #define GRPC_CQ_INTERNAL_REF(cc, reason) grpc_cq_internal_ref(cc)
-#define GRPC_CQ_INTERNAL_UNREF(ec, cc, reason) grpc_cq_internal_unref(ec, cc)
+#define GRPC_CQ_INTERNAL_UNREF(cc, reason) grpc_cq_internal_unref(cc)
 #endif
 
 /* Initializes global variables used by completion queues */
@@ -74,10 +73,8 @@
 
 /* Queue a GRPC_OP_COMPLETED operation; tag must correspond to the tag passed to
    grpc_cq_begin_op */
-void grpc_cq_end_op(grpc_exec_ctx* exec_ctx, grpc_completion_queue* cc,
-                    void* tag, grpc_error* error,
-                    void (*done)(grpc_exec_ctx* exec_ctx, void* done_arg,
-                                 grpc_cq_completion* storage),
+void grpc_cq_end_op(grpc_completion_queue* cc, void* tag, grpc_error* error,
+                    void (*done)(void* done_arg, grpc_cq_completion* storage),
                     void* done_arg, grpc_cq_completion* storage);
 
 grpc_pollset* grpc_cq_pollset(grpc_completion_queue* cc);
diff --git a/src/core/lib/surface/init.cc b/src/core/lib/surface/init.cc
index 8ee1383..0f40965 100644
--- a/src/core/lib/surface/init.cc
+++ b/src/core/lib/surface/init.cc
@@ -73,14 +73,12 @@
   grpc_fork_handlers_auto_register();
 }
 
-static bool append_filter(grpc_exec_ctx* exec_ctx,
-                          grpc_channel_stack_builder* builder, void* arg) {
+static bool append_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_append_filter(
       builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
 }
 
-static bool prepend_filter(grpc_exec_ctx* exec_ctx,
-                           grpc_channel_stack_builder* builder, void* arg) {
+static bool prepend_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_prepend_filter(
       builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
 }
@@ -123,7 +121,6 @@
   int i;
   gpr_once_init(&g_basic_init, do_basic_init);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_mu_lock(&g_init_mu);
   if (++g_initializations == 1) {
     gpr_time_init();
@@ -133,7 +130,8 @@
     grpc_mdctx_global_init();
     grpc_channel_init_init();
     grpc_security_pre_init();
-    grpc_iomgr_init(&exec_ctx);
+    grpc_core::ExecCtx::GlobalInit();
+    grpc_iomgr_init();
     gpr_timers_global_init();
     grpc_handshaker_factory_registry_init();
     grpc_security_init();
@@ -149,37 +147,41 @@
     grpc_tracer_init("GRPC_TRACE");
     /* no more changes to channel init pipelines */
     grpc_channel_init_finalize();
-    grpc_iomgr_start(&exec_ctx);
+    grpc_iomgr_start();
   }
   gpr_mu_unlock(&g_init_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   GRPC_API_TRACE("grpc_init(void)", 0, ());
 }
 
 void grpc_shutdown(void) {
   int i;
   GRPC_API_TRACE("grpc_shutdown(void)", 0, ());
-  grpc_exec_ctx exec_ctx =
-      GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, nullptr);
   gpr_mu_lock(&g_init_mu);
   if (--g_initializations == 0) {
-    grpc_executor_shutdown(&exec_ctx);
-    grpc_timer_manager_set_threading(false);  // shutdown timer_manager thread
-    for (i = g_number_of_plugins; i >= 0; i--) {
-      if (g_all_of_the_plugins[i].destroy != nullptr) {
-        g_all_of_the_plugins[i].destroy();
+    {
+      grpc_core::ExecCtx exec_ctx(0);
+      {
+        grpc_executor_shutdown();
+        grpc_timer_manager_set_threading(
+            false);  // shutdown timer_manager thread
+        for (i = g_number_of_plugins; i >= 0; i--) {
+          if (g_all_of_the_plugins[i].destroy != nullptr) {
+            g_all_of_the_plugins[i].destroy();
+          }
+        }
       }
+      grpc_iomgr_shutdown();
+      gpr_timers_global_destroy();
+      grpc_tracer_shutdown();
+      grpc_mdctx_global_shutdown();
+      grpc_handshaker_factory_registry_shutdown();
+      grpc_slice_intern_shutdown();
+      grpc_stats_shutdown();
     }
-    grpc_iomgr_shutdown(&exec_ctx);
-    gpr_timers_global_destroy();
-    grpc_tracer_shutdown();
-    grpc_mdctx_global_shutdown(&exec_ctx);
-    grpc_handshaker_factory_registry_shutdown(&exec_ctx);
-    grpc_slice_intern_shutdown();
-    grpc_stats_shutdown();
+    grpc_core::ExecCtx::GlobalShutdown();
   }
   gpr_mu_unlock(&g_init_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int grpc_is_initialized(void) {
diff --git a/src/core/lib/surface/init_secure.cc b/src/core/lib/surface/init_secure.cc
index 3eee570..75ed9fa 100644
--- a/src/core/lib/surface/init_secure.cc
+++ b/src/core/lib/surface/init_secure.cc
@@ -37,7 +37,7 @@
 void grpc_security_pre_init(void) {}
 
 static bool maybe_prepend_client_auth_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   if (args) {
@@ -52,7 +52,7 @@
 }
 
 static bool maybe_prepend_server_auth_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   if (args) {
diff --git a/src/core/lib/surface/lame_client.cc b/src/core/lib/surface/lame_client.cc
index c32c9af..08611ff 100644
--- a/src/core/lib/surface/lame_client.cc
+++ b/src/core/lib/surface/lame_client.cc
@@ -49,8 +49,7 @@
   const char* error_message;
 };
 
-static void fill_metadata(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-                          grpc_metadata_batch* mdb) {
+static void fill_metadata(grpc_call_element* elem, grpc_metadata_batch* mdb) {
   CallData* calld = reinterpret_cast<CallData*>(elem->call_data);
   bool expected = false;
   if (!calld->filled_metadata.compare_exchange_strong(
@@ -62,9 +61,9 @@
   char tmp[GPR_LTOA_MIN_BUFSIZE];
   gpr_ltoa(chand->error_code, tmp);
   calld->status.md = grpc_mdelem_from_slices(
-      exec_ctx, GRPC_MDSTR_GRPC_STATUS, grpc_slice_from_copied_string(tmp));
+      GRPC_MDSTR_GRPC_STATUS, grpc_slice_from_copied_string(tmp));
   calld->details.md = grpc_mdelem_from_slices(
-      exec_ctx, GRPC_MDSTR_GRPC_MESSAGE,
+      GRPC_MDSTR_GRPC_MESSAGE,
       grpc_slice_from_copied_string(chand->error_message));
   calld->status.prev = calld->details.next = nullptr;
   calld->status.next = &calld->details;
@@ -76,69 +75,67 @@
 }
 
 static void lame_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   CallData* calld = reinterpret_cast<CallData*>(elem->call_data);
   if (op->recv_initial_metadata) {
-    fill_metadata(exec_ctx, elem,
+    fill_metadata(elem,
                   op->payload->recv_initial_metadata.recv_initial_metadata);
   } else if (op->recv_trailing_metadata) {
-    fill_metadata(exec_ctx, elem,
+    fill_metadata(elem,
                   op->payload->recv_trailing_metadata.recv_trailing_metadata);
   }
   grpc_transport_stream_op_batch_finish_with_failure(
-      exec_ctx, op, GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"),
+      op, GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"),
       calld->call_combiner);
 }
 
-static void lame_get_channel_info(grpc_exec_ctx* exec_ctx,
-                                  grpc_channel_element* elem,
+static void lame_get_channel_info(grpc_channel_element* elem,
                                   const grpc_channel_info* channel_info) {}
 
-static void lame_start_transport_op(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_element* elem,
+static void lame_start_transport_op(grpc_channel_element* elem,
                                     grpc_transport_op* op) {
   if (op->on_connectivity_state_change) {
     GPR_ASSERT(*op->connectivity_state != GRPC_CHANNEL_SHUTDOWN);
     *op->connectivity_state = GRPC_CHANNEL_SHUTDOWN;
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_connectivity_state_change,
-                       GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(op->on_connectivity_state_change, GRPC_ERROR_NONE);
   }
-  if (op->send_ping != nullptr) {
+  if (op->send_ping.on_initiate != nullptr) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, op->send_ping,
+        op->send_ping.on_initiate,
+        GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"));
+  }
+  if (op->send_ping.on_ack != nullptr) {
+    GRPC_CLOSURE_SCHED(
+        op->send_ping.on_ack,
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"));
   }
   GRPC_ERROR_UNREF(op->disconnect_with_error);
   if (op->on_consumed != nullptr) {
-    GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
   }
 }
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   CallData* calld = reinterpret_cast<CallData*>(elem->call_data);
   calld->call_combiner = args->call_combiner;
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* then_schedule_closure) {
-  GRPC_CLOSURE_SCHED(exec_ctx, then_schedule_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(then_schedule_closure, GRPC_ERROR_NONE);
 }
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(args->is_first);
   GPR_ASSERT(args->is_last);
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 }  // namespace
 
@@ -163,10 +160,10 @@
 grpc_channel* grpc_lame_client_channel_create(const char* target,
                                               grpc_status_code error_code,
                                               const char* error_message) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_element* elem;
-  grpc_channel* channel = grpc_channel_create(
-      &exec_ctx, target, nullptr, GRPC_CLIENT_LAME_CHANNEL, nullptr);
+  grpc_channel* channel =
+      grpc_channel_create(target, nullptr, GRPC_CLIENT_LAME_CHANNEL, nullptr);
   elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
   GRPC_API_TRACE(
       "grpc_lame_client_channel_create(target=%s, error_code=%d, "
@@ -176,6 +173,6 @@
   auto chand = reinterpret_cast<grpc_core::ChannelData*>(elem->channel_data);
   chand->error_code = error_code;
   chand->error_message = error_message;
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return channel;
 }
diff --git a/src/core/lib/surface/server.cc b/src/core/lib/surface/server.cc
index e88e1ee..f1d428f 100644
--- a/src/core/lib/surface/server.cc
+++ b/src/core/lib/surface/server.cc
@@ -46,10 +46,9 @@
 
 typedef struct listener {
   void* arg;
-  void (*start)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                grpc_pollset** pollsets, size_t pollset_count);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                  grpc_closure* closure);
+  void (*start)(grpc_server* server, void* arg, grpc_pollset** pollsets,
+                size_t pollset_count);
+  void (*destroy)(grpc_server* server, void* arg, grpc_closure* closure);
   struct listener* next;
   grpc_closure destroy_done;
 } listener;
@@ -224,13 +223,12 @@
 #define SERVER_FROM_CALL_ELEM(elem) \
   (((channel_data*)(elem)->channel_data)->server)
 
-static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* calld,
-                            grpc_error* error);
-static void fail_call(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                      size_t cq_idx, requested_call* rc, grpc_error* error);
+static void publish_new_rpc(void* calld, grpc_error* error);
+static void fail_call(grpc_server* server, size_t cq_idx, requested_call* rc,
+                      grpc_error* error);
 /* Before calling maybe_finish_shutdown, we must hold mu_global and not
    hold mu_call */
-static void maybe_finish_shutdown(grpc_exec_ctx* exec_ctx, grpc_server* server);
+static void maybe_finish_shutdown(grpc_server* server);
 
 /*
  * channel broadcaster
@@ -258,15 +256,14 @@
   grpc_slice slice;
 };
 
-static void shutdown_cleanup(grpc_exec_ctx* exec_ctx, void* arg,
-                             grpc_error* error) {
+static void shutdown_cleanup(void* arg, grpc_error* error) {
   struct shutdown_cleanup_args* a = (struct shutdown_cleanup_args*)arg;
-  grpc_slice_unref_internal(exec_ctx, a->slice);
+  grpc_slice_unref_internal(a->slice);
   gpr_free(a);
 }
 
-static void send_shutdown(grpc_exec_ctx* exec_ctx, grpc_channel* channel,
-                          bool send_goaway, grpc_error* send_disconnect) {
+static void send_shutdown(grpc_channel* channel, bool send_goaway,
+                          grpc_error* send_disconnect) {
   struct shutdown_cleanup_args* sc =
       (struct shutdown_cleanup_args*)gpr_malloc(sizeof(*sc));
   GRPC_CLOSURE_INIT(&sc->closure, shutdown_cleanup, sc,
@@ -284,19 +281,18 @@
   op->disconnect_with_error = send_disconnect;
 
   elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
-  elem->filter->start_transport_op(exec_ctx, elem, op);
+  elem->filter->start_transport_op(elem, op);
 }
 
-static void channel_broadcaster_shutdown(grpc_exec_ctx* exec_ctx,
-                                         channel_broadcaster* cb,
+static void channel_broadcaster_shutdown(channel_broadcaster* cb,
                                          bool send_goaway,
                                          grpc_error* force_disconnect) {
   size_t i;
 
   for (i = 0; i < cb->num_channels; i++) {
-    send_shutdown(exec_ctx, cb->channels[i], send_goaway,
+    send_shutdown(cb->channels[i], send_goaway,
                   GRPC_ERROR_REF(force_disconnect));
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, cb->channels[i], "broadcast");
+    GRPC_CHANNEL_INTERNAL_UNREF(cb->channels[i], "broadcast");
   }
   gpr_free(cb->channels);
   GRPC_ERROR_UNREF(force_disconnect);
@@ -324,13 +320,11 @@
   gpr_free(rm->requests_per_cq);
 }
 
-static void kill_zombie(grpc_exec_ctx* exec_ctx, void* elem,
-                        grpc_error* error) {
+static void kill_zombie(void* elem, grpc_error* error) {
   grpc_call_unref(grpc_call_from_top_element((grpc_call_element*)elem));
 }
 
-static void request_matcher_zombify_all_pending_calls(grpc_exec_ctx* exec_ctx,
-                                                      request_matcher* rm) {
+static void request_matcher_zombify_all_pending_calls(request_matcher* rm) {
   while (rm->pending_head) {
     call_data* calld = rm->pending_head;
     rm->pending_head = calld->pending_next;
@@ -339,19 +333,18 @@
         &calld->kill_zombie_closure, kill_zombie,
         grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0),
         grpc_schedule_on_exec_ctx);
-    GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_NONE);
   }
 }
 
-static void request_matcher_kill_requests(grpc_exec_ctx* exec_ctx,
-                                          grpc_server* server,
+static void request_matcher_kill_requests(grpc_server* server,
                                           request_matcher* rm,
                                           grpc_error* error) {
   requested_call* rc;
   for (size_t i = 0; i < server->cq_count; i++) {
     while ((rc = (requested_call*)gpr_locked_mpscq_pop(
                 &rm->requests_per_cq[i])) != nullptr) {
-      fail_call(exec_ctx, server, i, rc, GRPC_ERROR_REF(error));
+      fail_call(server, i, rc, GRPC_ERROR_REF(error));
     }
   }
   GRPC_ERROR_UNREF(error);
@@ -365,10 +358,10 @@
   gpr_ref(&server->internal_refcount);
 }
 
-static void server_delete(grpc_exec_ctx* exec_ctx, grpc_server* server) {
+static void server_delete(grpc_server* server) {
   registered_method* rm;
   size_t i;
-  grpc_channel_args_destroy(exec_ctx, server->channel_args);
+  grpc_channel_args_destroy(server->channel_args);
   gpr_mu_destroy(&server->mu_global);
   gpr_mu_destroy(&server->mu_call);
   gpr_cv_destroy(&server->starting_cv);
@@ -385,7 +378,7 @@
     request_matcher_destroy(&server->unregistered_request_matcher);
   }
   for (i = 0; i < server->cq_count; i++) {
-    GRPC_CQ_INTERNAL_UNREF(exec_ctx, server->cqs[i], "server");
+    GRPC_CQ_INTERNAL_UNREF(server->cqs[i], "server");
   }
   gpr_free(server->cqs);
   gpr_free(server->pollsets);
@@ -393,9 +386,9 @@
   gpr_free(server);
 }
 
-static void server_unref(grpc_exec_ctx* exec_ctx, grpc_server* server) {
+static void server_unref(grpc_server* server) {
   if (gpr_unref(&server->internal_refcount)) {
-    server_delete(exec_ctx, server);
+    server_delete(server);
   }
 }
 
@@ -409,21 +402,19 @@
   chand->next = chand->prev = chand;
 }
 
-static void finish_destroy_channel(grpc_exec_ctx* exec_ctx, void* cd,
-                                   grpc_error* error) {
+static void finish_destroy_channel(void* cd, grpc_error* error) {
   channel_data* chand = (channel_data*)cd;
   grpc_server* server = chand->server;
-  GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, chand->channel, "server");
-  server_unref(exec_ctx, server);
+  GRPC_CHANNEL_INTERNAL_UNREF(chand->channel, "server");
+  server_unref(server);
 }
 
-static void destroy_channel(grpc_exec_ctx* exec_ctx, channel_data* chand,
-                            grpc_error* error) {
+static void destroy_channel(channel_data* chand, grpc_error* error) {
   if (is_channel_orphaned(chand)) return;
   GPR_ASSERT(chand->server != nullptr);
   orphan_channel(chand);
   server_ref(chand->server);
-  maybe_finish_shutdown(exec_ctx, chand->server);
+  maybe_finish_shutdown(chand->server);
   GRPC_CLOSURE_INIT(&chand->finish_destroy_channel_closure,
                     finish_destroy_channel, chand, grpc_schedule_on_exec_ctx);
 
@@ -436,20 +427,18 @@
   grpc_transport_op* op =
       grpc_make_transport_op(&chand->finish_destroy_channel_closure);
   op->set_accept_stream = true;
-  grpc_channel_next_op(exec_ctx,
-                       grpc_channel_stack_element(
+  grpc_channel_next_op(grpc_channel_stack_element(
                            grpc_channel_get_channel_stack(chand->channel), 0),
                        op);
 }
 
-static void done_request_event(grpc_exec_ctx* exec_ctx, void* req,
-                               grpc_cq_completion* c) {
+static void done_request_event(void* req, grpc_cq_completion* c) {
   gpr_free(req);
 }
 
-static void publish_call(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                         call_data* calld, size_t cq_idx, requested_call* rc) {
-  grpc_call_set_completion_queue(exec_ctx, calld->call, rc->cq_bound_to_call);
+static void publish_call(grpc_server* server, call_data* calld, size_t cq_idx,
+                         requested_call* rc) {
+  grpc_call_set_completion_queue(calld->call, rc->cq_bound_to_call);
   grpc_call* call = calld->call;
   *rc->call = call;
   calld->cq_new = server->cqs[cq_idx];
@@ -476,12 +465,11 @@
       GPR_UNREACHABLE_CODE(return );
   }
 
-  grpc_cq_end_op(exec_ctx, calld->cq_new, rc->tag, GRPC_ERROR_NONE,
-                 done_request_event, rc, &rc->completion);
+  grpc_cq_end_op(calld->cq_new, rc->tag, GRPC_ERROR_NONE, done_request_event,
+                 rc, &rc->completion);
 }
 
-static void publish_new_rpc(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void publish_new_rpc(void* arg, grpc_error* error) {
   grpc_call_element* call_elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)call_elem->call_data;
   channel_data* chand = (channel_data*)call_elem->channel_data;
@@ -494,8 +482,7 @@
         &calld->kill_zombie_closure, kill_zombie,
         grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0),
         grpc_schedule_on_exec_ctx);
-    GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure,
-                       GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_REF(error));
     return;
   }
 
@@ -506,15 +493,15 @@
     if (rc == nullptr) {
       continue;
     } else {
-      GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, i);
+      GRPC_STATS_INC_SERVER_CQS_CHECKED(i);
       gpr_atm_no_barrier_store(&calld->state, ACTIVATED);
-      publish_call(exec_ctx, server, calld, cq_idx, rc);
+      publish_call(server, calld, cq_idx, rc);
       return; /* early out */
     }
   }
 
   /* no cq to take the request found: queue it on the slow list */
-  GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED(exec_ctx);
+  GRPC_STATS_INC_SERVER_SLOWPATH_REQUESTS_QUEUED();
   gpr_mu_lock(&server->mu_call);
 
   // We need to ensure that all the queues are empty.  We do this under
@@ -529,9 +516,9 @@
       continue;
     } else {
       gpr_mu_unlock(&server->mu_call);
-      GRPC_STATS_INC_SERVER_CQS_CHECKED(exec_ctx, i + server->cq_count);
+      GRPC_STATS_INC_SERVER_CQS_CHECKED(i + server->cq_count);
       gpr_atm_no_barrier_store(&calld->state, ACTIVATED);
-      publish_call(exec_ctx, server, calld, cq_idx, rc);
+      publish_call(server, calld, cq_idx, rc);
       return; /* early out */
     }
   }
@@ -548,8 +535,7 @@
 }
 
 static void finish_start_new_rpc(
-    grpc_exec_ctx* exec_ctx, grpc_server* server, grpc_call_element* elem,
-    request_matcher* rm,
+    grpc_server* server, grpc_call_element* elem, request_matcher* rm,
     grpc_server_register_method_payload_handling payload_handling) {
   call_data* calld = (call_data*)elem->call_data;
 
@@ -557,7 +543,7 @@
     gpr_atm_no_barrier_store(&calld->state, ZOMBIED);
     GRPC_CLOSURE_INIT(&calld->kill_zombie_closure, kill_zombie, elem,
                       grpc_schedule_on_exec_ctx);
-    GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_NONE);
     return;
   }
 
@@ -565,7 +551,7 @@
 
   switch (payload_handling) {
     case GRPC_SRM_PAYLOAD_NONE:
-      publish_new_rpc(exec_ctx, elem, GRPC_ERROR_NONE);
+      publish_new_rpc(elem, GRPC_ERROR_NONE);
       break;
     case GRPC_SRM_PAYLOAD_READ_INITIAL_BYTE_BUFFER: {
       grpc_op op;
@@ -574,14 +560,13 @@
       op.data.recv_message.recv_message = &calld->payload;
       GRPC_CLOSURE_INIT(&calld->publish, publish_new_rpc, elem,
                         grpc_schedule_on_exec_ctx);
-      grpc_call_start_batch_and_execute(exec_ctx, calld->call, &op, 1,
-                                        &calld->publish);
+      grpc_call_start_batch_and_execute(calld->call, &op, 1, &calld->publish);
       break;
     }
   }
 }
 
-static void start_new_rpc(grpc_exec_ctx* exec_ctx, grpc_call_element* elem) {
+static void start_new_rpc(grpc_call_element* elem) {
   channel_data* chand = (channel_data*)elem->channel_data;
   call_data* calld = (call_data*)elem->call_data;
   grpc_server* server = chand->server;
@@ -606,8 +591,7 @@
                 GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST)) {
         continue;
       }
-      finish_start_new_rpc(exec_ctx, server, elem,
-                           &rm->server_registered_method->matcher,
+      finish_start_new_rpc(server, elem, &rm->server_registered_method->matcher,
                            rm->server_registered_method->payload_handling);
       return;
     }
@@ -624,14 +608,12 @@
                 GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST)) {
         continue;
       }
-      finish_start_new_rpc(exec_ctx, server, elem,
-                           &rm->server_registered_method->matcher,
+      finish_start_new_rpc(server, elem, &rm->server_registered_method->matcher,
                            rm->server_registered_method->payload_handling);
       return;
     }
   }
-  finish_start_new_rpc(exec_ctx, server, elem,
-                       &server->unregistered_request_matcher,
+  finish_start_new_rpc(server, elem, &server->unregistered_request_matcher,
                        GRPC_SRM_PAYLOAD_NONE);
 }
 
@@ -644,9 +626,8 @@
   return n;
 }
 
-static void done_shutdown_event(grpc_exec_ctx* exec_ctx, void* server,
-                                grpc_cq_completion* completion) {
-  server_unref(exec_ctx, (grpc_server*)server);
+static void done_shutdown_event(void* server, grpc_cq_completion* completion) {
+  server_unref((grpc_server*)server);
 }
 
 static int num_channels(grpc_server* server) {
@@ -659,34 +640,30 @@
   return n;
 }
 
-static void kill_pending_work_locked(grpc_exec_ctx* exec_ctx,
-                                     grpc_server* server, grpc_error* error) {
+static void kill_pending_work_locked(grpc_server* server, grpc_error* error) {
   if (server->started) {
-    request_matcher_kill_requests(exec_ctx, server,
-                                  &server->unregistered_request_matcher,
+    request_matcher_kill_requests(server, &server->unregistered_request_matcher,
                                   GRPC_ERROR_REF(error));
     request_matcher_zombify_all_pending_calls(
-        exec_ctx, &server->unregistered_request_matcher);
+        &server->unregistered_request_matcher);
     for (registered_method* rm = server->registered_methods; rm;
          rm = rm->next) {
-      request_matcher_kill_requests(exec_ctx, server, &rm->matcher,
+      request_matcher_kill_requests(server, &rm->matcher,
                                     GRPC_ERROR_REF(error));
-      request_matcher_zombify_all_pending_calls(exec_ctx, &rm->matcher);
+      request_matcher_zombify_all_pending_calls(&rm->matcher);
     }
   }
   GRPC_ERROR_UNREF(error);
 }
 
-static void maybe_finish_shutdown(grpc_exec_ctx* exec_ctx,
-                                  grpc_server* server) {
+static void maybe_finish_shutdown(grpc_server* server) {
   size_t i;
   if (!gpr_atm_acq_load(&server->shutdown_flag) || server->shutdown_published) {
     return;
   }
 
   kill_pending_work_locked(
-      exec_ctx, server,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
+      server, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
 
   if (server->root_channel_data.next != &server->root_channel_data ||
       server->listeners_destroyed < num_listeners(server)) {
@@ -706,15 +683,13 @@
   server->shutdown_published = 1;
   for (i = 0; i < server->num_shutdown_tags; i++) {
     server_ref(server);
-    grpc_cq_end_op(exec_ctx, server->shutdown_tags[i].cq,
-                   server->shutdown_tags[i].tag, GRPC_ERROR_NONE,
-                   done_shutdown_event, server,
+    grpc_cq_end_op(server->shutdown_tags[i].cq, server->shutdown_tags[i].tag,
+                   GRPC_ERROR_NONE, done_shutdown_event, server,
                    &server->shutdown_tags[i].completion);
   }
 }
 
-static void server_on_recv_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr,
-                                            grpc_error* error) {
+static void server_on_recv_initial_metadata(void* ptr, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)ptr;
   call_data* calld = (call_data*)elem->call_data;
   grpc_millis op_deadline;
@@ -728,10 +703,10 @@
         GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.authority->md));
     calld->path_set = true;
     calld->host_set = true;
-    grpc_metadata_batch_remove(exec_ctx, calld->recv_initial_metadata,
+    grpc_metadata_batch_remove(calld->recv_initial_metadata,
                                calld->recv_initial_metadata->idx.named.path);
     grpc_metadata_batch_remove(
-        exec_ctx, calld->recv_initial_metadata,
+        calld->recv_initial_metadata,
         calld->recv_initial_metadata->idx.named.authority);
   } else {
     GRPC_ERROR_REF(error);
@@ -749,7 +724,7 @@
     GRPC_ERROR_UNREF(src_error);
   }
 
-  GRPC_CLOSURE_RUN(exec_ctx, calld->on_done_recv_initial_metadata, error);
+  GRPC_CLOSURE_RUN(calld->on_done_recv_initial_metadata, error);
 }
 
 static void server_mutate_op(grpc_call_element* elem,
@@ -770,24 +745,21 @@
 }
 
 static void server_start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   server_mutate_op(elem, op);
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
-static void got_initial_metadata(grpc_exec_ctx* exec_ctx, void* ptr,
-                                 grpc_error* error) {
+static void got_initial_metadata(void* ptr, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)ptr;
   call_data* calld = (call_data*)elem->call_data;
   if (error == GRPC_ERROR_NONE) {
-    start_new_rpc(exec_ctx, elem);
+    start_new_rpc(elem);
   } else {
     if (gpr_atm_full_cas(&calld->state, NOT_STARTED, ZOMBIED)) {
       GRPC_CLOSURE_INIT(&calld->kill_zombie_closure, kill_zombie, elem,
                         grpc_schedule_on_exec_ctx);
-      GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure,
-                         GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_NONE);
     } else if (gpr_atm_full_cas(&calld->state, PENDING, ZOMBIED)) {
       /* zombied call will be destroyed when it's removed from the pending
          queue... later */
@@ -795,8 +767,7 @@
   }
 }
 
-static void accept_stream(grpc_exec_ctx* exec_ctx, void* cd,
-                          grpc_transport* transport,
+static void accept_stream(void* cd, grpc_transport* transport,
                           const void* transport_server_data) {
   channel_data* chand = (channel_data*)cd;
   /* create a call */
@@ -806,11 +777,11 @@
   args.server_transport_data = transport_server_data;
   args.send_deadline = GRPC_MILLIS_INF_FUTURE;
   grpc_call* call;
-  grpc_error* error = grpc_call_create(exec_ctx, &args, &call);
+  grpc_error* error = grpc_call_create(&args, &call);
   grpc_call_element* elem =
       grpc_call_stack_element(grpc_call_get_call_stack(call), 0);
   if (error != GRPC_ERROR_NONE) {
-    got_initial_metadata(exec_ctx, elem, error);
+    got_initial_metadata(elem, error);
     GRPC_ERROR_UNREF(error);
     return;
   }
@@ -822,32 +793,28 @@
       &calld->initial_metadata;
   GRPC_CLOSURE_INIT(&calld->got_initial_metadata, got_initial_metadata, elem,
                     grpc_schedule_on_exec_ctx);
-  grpc_call_start_batch_and_execute(exec_ctx, call, &op, 1,
-                                    &calld->got_initial_metadata);
+  grpc_call_start_batch_and_execute(call, &op, 1, &calld->got_initial_metadata);
 }
 
-static void channel_connectivity_changed(grpc_exec_ctx* exec_ctx, void* cd,
-                                         grpc_error* error) {
+static void channel_connectivity_changed(void* cd, grpc_error* error) {
   channel_data* chand = (channel_data*)cd;
   grpc_server* server = chand->server;
   if (chand->connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
     grpc_transport_op* op = grpc_make_transport_op(nullptr);
     op->on_connectivity_state_change = &chand->channel_connectivity_changed;
     op->connectivity_state = &chand->connectivity_state;
-    grpc_channel_next_op(exec_ctx,
-                         grpc_channel_stack_element(
+    grpc_channel_next_op(grpc_channel_stack_element(
                              grpc_channel_get_channel_stack(chand->channel), 0),
                          op);
   } else {
     gpr_mu_lock(&server->mu_global);
-    destroy_channel(exec_ctx, chand, GRPC_ERROR_REF(error));
+    destroy_channel(chand, GRPC_ERROR_REF(error));
     gpr_mu_unlock(&server->mu_global);
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, chand->channel, "connectivity");
+    GRPC_CHANNEL_INTERNAL_UNREF(chand->channel, "connectivity");
   }
 }
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   call_data* calld = (call_data*)elem->call_data;
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -863,7 +830,7 @@
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   channel_data* chand = (channel_data*)elem->channel_data;
@@ -872,19 +839,18 @@
   GPR_ASSERT(calld->state != PENDING);
 
   if (calld->host_set) {
-    grpc_slice_unref_internal(exec_ctx, calld->host);
+    grpc_slice_unref_internal(calld->host);
   }
   if (calld->path_set) {
-    grpc_slice_unref_internal(exec_ctx, calld->path);
+    grpc_slice_unref_internal(calld->path);
   }
   grpc_metadata_array_destroy(&calld->initial_metadata);
   grpc_byte_buffer_destroy(calld->payload);
 
-  server_unref(exec_ctx, chand->server);
+  server_unref(chand->server);
 }
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   channel_data* chand = (channel_data*)elem->channel_data;
   GPR_ASSERT(args->is_first);
@@ -900,15 +866,14 @@
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {
+static void destroy_channel_elem(grpc_channel_element* elem) {
   size_t i;
   channel_data* chand = (channel_data*)elem->channel_data;
   if (chand->registered_methods) {
     for (i = 0; i < chand->registered_method_slots; i++) {
-      grpc_slice_unref_internal(exec_ctx, chand->registered_methods[i].method);
+      grpc_slice_unref_internal(chand->registered_methods[i].method);
       if (chand->registered_methods[i].has_host) {
-        grpc_slice_unref_internal(exec_ctx, chand->registered_methods[i].host);
+        grpc_slice_unref_internal(chand->registered_methods[i].host);
       }
     }
     gpr_free(chand->registered_methods);
@@ -918,9 +883,9 @@
     chand->next->prev = chand->prev;
     chand->prev->next = chand->next;
     chand->next = chand->prev = chand;
-    maybe_finish_shutdown(exec_ctx, chand->server);
+    maybe_finish_shutdown(chand->server);
     gpr_mu_unlock(&chand->server->mu_global);
-    server_unref(exec_ctx, chand->server);
+    server_unref(chand->server);
   }
 }
 
@@ -1034,11 +999,10 @@
   return m;
 }
 
-static void start_listeners(grpc_exec_ctx* exec_ctx, void* s,
-                            grpc_error* error) {
+static void start_listeners(void* s, grpc_error* error) {
   grpc_server* server = (grpc_server*)s;
   for (listener* l = server->listeners; l; l = l->next) {
-    l->start(exec_ctx, server, l->arg, server->pollsets, server->pollset_count);
+    l->start(server, l->arg, server->pollsets, server->pollset_count);
   }
 
   gpr_mu_lock(&server->mu_global);
@@ -1046,12 +1010,12 @@
   gpr_cv_signal(&server->starting_cv);
   gpr_mu_unlock(&server->mu_global);
 
-  server_unref(exec_ctx, server);
+  server_unref(server);
 }
 
 void grpc_server_start(grpc_server* server) {
   size_t i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_server_start(server=%p)", 1, (server));
 
@@ -1073,12 +1037,9 @@
   server_ref(server);
   server->starting = true;
   GRPC_CLOSURE_SCHED(
-      &exec_ctx,
       GRPC_CLOSURE_CREATE(start_listeners, server,
                           grpc_executor_scheduler(GRPC_EXECUTOR_SHORT)),
       GRPC_ERROR_NONE);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void grpc_server_get_pollsets(grpc_server* server, grpc_pollset*** pollsets,
@@ -1087,8 +1048,7 @@
   *pollsets = server->pollsets;
 }
 
-void grpc_server_setup_transport(grpc_exec_ctx* exec_ctx, grpc_server* s,
-                                 grpc_transport* transport,
+void grpc_server_setup_transport(grpc_server* s, grpc_transport* transport,
                                  grpc_pollset* accepting_pollset,
                                  const grpc_channel_args* args) {
   size_t num_registered_methods;
@@ -1103,8 +1063,7 @@
   uint32_t max_probes = 0;
   grpc_transport_op* op = nullptr;
 
-  channel = grpc_channel_create(exec_ctx, nullptr, args, GRPC_SERVER_CHANNEL,
-                                transport);
+  channel = grpc_channel_create(nullptr, args, GRPC_SERVER_CHANNEL, transport);
   chand = (channel_data*)grpc_channel_stack_element(
               grpc_channel_get_channel_stack(channel), 0)
               ->channel_data;
@@ -1181,21 +1140,19 @@
     op->disconnect_with_error =
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server shutdown");
   }
-  grpc_transport_perform_op(exec_ctx, transport, op);
+  grpc_transport_perform_op(transport, op);
 }
 
-void done_published_shutdown(grpc_exec_ctx* exec_ctx, void* done_arg,
-                             grpc_cq_completion* storage) {
+void done_published_shutdown(void* done_arg, grpc_cq_completion* storage) {
   (void)done_arg;
   gpr_free(storage);
 }
 
-static void listener_destroy_done(grpc_exec_ctx* exec_ctx, void* s,
-                                  grpc_error* error) {
+static void listener_destroy_done(void* s, grpc_error* error) {
   grpc_server* server = (grpc_server*)s;
   gpr_mu_lock(&server->mu_global);
   server->listeners_destroyed++;
-  maybe_finish_shutdown(exec_ctx, server);
+  maybe_finish_shutdown(server);
   gpr_mu_unlock(&server->mu_global);
 }
 
@@ -1204,7 +1161,7 @@
   listener* l;
   shutdown_tag* sdt;
   channel_broadcaster broadcaster;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_server_shutdown_and_notify(server=%p, cq=%p, tag=%p)", 3,
                  (server, cq, tag));
@@ -1219,11 +1176,10 @@
   /* stay locked, and gather up some stuff to do */
   GPR_ASSERT(grpc_cq_begin_op(cq, tag));
   if (server->shutdown_published) {
-    grpc_cq_end_op(&exec_ctx, cq, tag, GRPC_ERROR_NONE, done_published_shutdown,
-                   nullptr,
+    grpc_cq_end_op(cq, tag, GRPC_ERROR_NONE, done_published_shutdown, nullptr,
                    (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion)));
     gpr_mu_unlock(&server->mu_global);
-    goto done;
+    return;
   }
   server->shutdown_tags = (shutdown_tag*)gpr_realloc(
       server->shutdown_tags,
@@ -1233,7 +1189,7 @@
   sdt->cq = cq;
   if (gpr_atm_acq_load(&server->shutdown_flag)) {
     gpr_mu_unlock(&server->mu_global);
-    goto done;
+    return;
   }
 
   server->last_shutdown_message_time = gpr_now(GPR_CLOCK_REALTIME);
@@ -1245,30 +1201,26 @@
   /* collect all unregistered then registered calls */
   gpr_mu_lock(&server->mu_call);
   kill_pending_work_locked(
-      &exec_ctx, server,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
+      server, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
   gpr_mu_unlock(&server->mu_call);
 
-  maybe_finish_shutdown(&exec_ctx, server);
+  maybe_finish_shutdown(server);
   gpr_mu_unlock(&server->mu_global);
 
   /* Shutdown listeners */
   for (l = server->listeners; l; l = l->next) {
     GRPC_CLOSURE_INIT(&l->destroy_done, listener_destroy_done, server,
                       grpc_schedule_on_exec_ctx);
-    l->destroy(&exec_ctx, server, l->arg, &l->destroy_done);
+    l->destroy(server, l->arg, &l->destroy_done);
   }
 
-  channel_broadcaster_shutdown(&exec_ctx, &broadcaster, true /* send_goaway */,
+  channel_broadcaster_shutdown(&broadcaster, true /* send_goaway */,
                                GRPC_ERROR_NONE);
-
-done:
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void grpc_server_cancel_all_calls(grpc_server* server) {
   channel_broadcaster broadcaster;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_server_cancel_all_calls(server=%p)", 1, (server));
 
@@ -1277,14 +1229,13 @@
   gpr_mu_unlock(&server->mu_global);
 
   channel_broadcaster_shutdown(
-      &exec_ctx, &broadcaster, false /* send_goaway */,
+      &broadcaster, false /* send_goaway */,
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("Cancelling all calls"));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void grpc_server_destroy(grpc_server* server) {
   listener* l;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_API_TRACE("grpc_server_destroy(server=%p)", 1, (server));
 
@@ -1300,16 +1251,15 @@
 
   gpr_mu_unlock(&server->mu_global);
 
-  server_unref(&exec_ctx, server);
-  grpc_exec_ctx_finish(&exec_ctx);
+  server_unref(server);
 }
 
-void grpc_server_add_listener(
-    grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-    void (*start)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                  grpc_pollset** pollsets, size_t pollset_count),
-    void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                    grpc_closure* on_done)) {
+void grpc_server_add_listener(grpc_server* server, void* arg,
+                              void (*start)(grpc_server* server, void* arg,
+                                            grpc_pollset** pollsets,
+                                            size_t pollset_count),
+                              void (*destroy)(grpc_server* server, void* arg,
+                                              grpc_closure* on_done)) {
   listener* l = (listener*)gpr_malloc(sizeof(listener));
   l->arg = arg;
   l->start = start;
@@ -1318,13 +1268,12 @@
   server->listeners = l;
 }
 
-static grpc_call_error queue_call_request(grpc_exec_ctx* exec_ctx,
-                                          grpc_server* server, size_t cq_idx,
+static grpc_call_error queue_call_request(grpc_server* server, size_t cq_idx,
                                           requested_call* rc) {
   call_data* calld = nullptr;
   request_matcher* rm = nullptr;
   if (gpr_atm_acq_load(&server->shutdown_flag)) {
-    fail_call(exec_ctx, server, cq_idx, rc,
+    fail_call(server, cq_idx, rc,
               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
     return GRPC_CALL_OK;
   }
@@ -1351,10 +1300,9 @@
             &calld->kill_zombie_closure, kill_zombie,
             grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0),
             grpc_schedule_on_exec_ctx);
-        GRPC_CLOSURE_SCHED(exec_ctx, &calld->kill_zombie_closure,
-                           GRPC_ERROR_NONE);
+        GRPC_CLOSURE_SCHED(&calld->kill_zombie_closure, GRPC_ERROR_NONE);
       } else {
-        publish_call(exec_ctx, server, calld, cq_idx, rc);
+        publish_call(server, calld, cq_idx, rc);
       }
       gpr_mu_lock(&server->mu_call);
     }
@@ -1369,9 +1317,9 @@
     grpc_completion_queue* cq_bound_to_call,
     grpc_completion_queue* cq_for_notification, void* tag) {
   grpc_call_error error;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   requested_call* rc = (requested_call*)gpr_malloc(sizeof(*rc));
-  GRPC_STATS_INC_SERVER_REQUESTED_CALLS(&exec_ctx);
+  GRPC_STATS_INC_SERVER_REQUESTED_CALLS();
   GRPC_API_TRACE(
       "grpc_server_request_call("
       "server=%p, call=%p, details=%p, initial_metadata=%p, "
@@ -1404,9 +1352,9 @@
   rc->call = call;
   rc->data.batch.details = details;
   rc->initial_metadata = initial_metadata;
-  error = queue_call_request(&exec_ctx, server, cq_idx, rc);
+  error = queue_call_request(server, cq_idx, rc);
 done:
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return error;
 }
 
@@ -1416,10 +1364,10 @@
     grpc_completion_queue* cq_bound_to_call,
     grpc_completion_queue* cq_for_notification, void* tag) {
   grpc_call_error error;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   requested_call* rc = (requested_call*)gpr_malloc(sizeof(*rc));
   registered_method* rm = (registered_method*)rmp;
-  GRPC_STATS_INC_SERVER_REQUESTED_CALLS(&exec_ctx);
+  GRPC_STATS_INC_SERVER_REQUESTED_CALLS();
   GRPC_API_TRACE(
       "grpc_server_request_registered_call("
       "server=%p, rmp=%p, call=%p, deadline=%p, initial_metadata=%p, "
@@ -1461,20 +1409,20 @@
   rc->data.registered.deadline = deadline;
   rc->initial_metadata = initial_metadata;
   rc->data.registered.optional_payload = optional_payload;
-  error = queue_call_request(&exec_ctx, server, cq_idx, rc);
+  error = queue_call_request(server, cq_idx, rc);
 done:
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return error;
 }
 
-static void fail_call(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                      size_t cq_idx, requested_call* rc, grpc_error* error) {
+static void fail_call(grpc_server* server, size_t cq_idx, requested_call* rc,
+                      grpc_error* error) {
   *rc->call = nullptr;
   rc->initial_metadata->count = 0;
   GPR_ASSERT(error != GRPC_ERROR_NONE);
 
-  grpc_cq_end_op(exec_ctx, server->cqs[cq_idx], rc->tag, error,
-                 done_request_event, rc, &rc->completion);
+  grpc_cq_end_op(server->cqs[cq_idx], rc->tag, error, done_request_event, rc,
+                 &rc->completion);
 }
 
 const grpc_channel_args* grpc_server_get_channel_args(grpc_server* server) {
diff --git a/src/core/lib/surface/server.h b/src/core/lib/surface/server.h
index d7ec025..63b6dff 100644
--- a/src/core/lib/surface/server.h
+++ b/src/core/lib/surface/server.h
@@ -31,17 +31,16 @@
 
 /* Add a listener to the server: when the server starts, it will call start,
    and when it shuts down, it will call destroy */
-void grpc_server_add_listener(
-    grpc_exec_ctx* exec_ctx, grpc_server* server, void* listener,
-    void (*start)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                  grpc_pollset** pollsets, size_t npollsets),
-    void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_server* server, void* arg,
-                    grpc_closure* on_done));
+void grpc_server_add_listener(grpc_server* server, void* listener,
+                              void (*start)(grpc_server* server, void* arg,
+                                            grpc_pollset** pollsets,
+                                            size_t npollsets),
+                              void (*destroy)(grpc_server* server, void* arg,
+                                              grpc_closure* on_done));
 
 /* Setup a transport - creates a channel stack, binds the transport to the
    server */
-void grpc_server_setup_transport(grpc_exec_ctx* exec_ctx, grpc_server* server,
-                                 grpc_transport* transport,
+void grpc_server_setup_transport(grpc_server* server, grpc_transport* transport,
                                  grpc_pollset* accepting_pollset,
                                  const grpc_channel_args* args);
 
diff --git a/src/core/lib/transport/bdp_estimator.cc b/src/core/lib/transport/bdp_estimator.cc
index bb0e583..5fcc62e 100644
--- a/src/core/lib/transport/bdp_estimator.cc
+++ b/src/core/lib/transport/bdp_estimator.cc
@@ -37,7 +37,7 @@
       bw_est_(0),
       name_(name) {}
 
-grpc_millis BdpEstimator::CompletePing(grpc_exec_ctx* exec_ctx) {
+grpc_millis BdpEstimator::CompletePing() {
   gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
   gpr_timespec dt_ts = gpr_time_sub(now, ping_start_time_);
   double dt = (double)dt_ts.tv_sec + 1e-9 * (double)dt_ts.tv_nsec;
@@ -78,7 +78,7 @@
   }
   ping_state_ = PingState::UNSCHEDULED;
   accumulator_ = 0;
-  return grpc_exec_ctx_now(exec_ctx) + inter_ping_delay_;
+  return grpc_core::ExecCtx::Get()->Now() + inter_ping_delay_;
 }
 
 }  // namespace grpc_core
diff --git a/src/core/lib/transport/bdp_estimator.h b/src/core/lib/transport/bdp_estimator.h
index df3a86c..e703af1 100644
--- a/src/core/lib/transport/bdp_estimator.h
+++ b/src/core/lib/transport/bdp_estimator.h
@@ -73,7 +73,7 @@
   }
 
   // Completes a previously started ping, returns when to schedule the next one
-  grpc_millis CompletePing(grpc_exec_ctx* exec_ctx);
+  grpc_millis CompletePing();
 
  private:
   enum class PingState { UNSCHEDULED, SCHEDULED, STARTED };
diff --git a/src/core/lib/transport/byte_stream.cc b/src/core/lib/transport/byte_stream.cc
index b872025..8dcb1e0 100644
--- a/src/core/lib/transport/byte_stream.cc
+++ b/src/core/lib/transport/byte_stream.cc
@@ -25,34 +25,28 @@
 
 #include "src/core/lib/slice/slice_internal.h"
 
-bool grpc_byte_stream_next(grpc_exec_ctx* exec_ctx,
-                           grpc_byte_stream* byte_stream, size_t max_size_hint,
+bool grpc_byte_stream_next(grpc_byte_stream* byte_stream, size_t max_size_hint,
                            grpc_closure* on_complete) {
-  return byte_stream->vtable->next(exec_ctx, byte_stream, max_size_hint,
-                                   on_complete);
+  return byte_stream->vtable->next(byte_stream, max_size_hint, on_complete);
 }
 
-grpc_error* grpc_byte_stream_pull(grpc_exec_ctx* exec_ctx,
-                                  grpc_byte_stream* byte_stream,
+grpc_error* grpc_byte_stream_pull(grpc_byte_stream* byte_stream,
                                   grpc_slice* slice) {
-  return byte_stream->vtable->pull(exec_ctx, byte_stream, slice);
+  return byte_stream->vtable->pull(byte_stream, slice);
 }
 
-void grpc_byte_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                               grpc_byte_stream* byte_stream,
+void grpc_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                grpc_error* error) {
-  byte_stream->vtable->shutdown(exec_ctx, byte_stream, error);
+  byte_stream->vtable->shutdown(byte_stream, error);
 }
 
-void grpc_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_byte_stream* byte_stream) {
-  byte_stream->vtable->destroy(exec_ctx, byte_stream);
+void grpc_byte_stream_destroy(grpc_byte_stream* byte_stream) {
+  byte_stream->vtable->destroy(byte_stream);
 }
 
 // grpc_slice_buffer_stream
 
-static bool slice_buffer_stream_next(grpc_exec_ctx* exec_ctx,
-                                     grpc_byte_stream* byte_stream,
+static bool slice_buffer_stream_next(grpc_byte_stream* byte_stream,
                                      size_t max_size_hint,
                                      grpc_closure* on_complete) {
   grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
@@ -60,8 +54,7 @@
   return true;
 }
 
-static grpc_error* slice_buffer_stream_pull(grpc_exec_ctx* exec_ctx,
-                                            grpc_byte_stream* byte_stream,
+static grpc_error* slice_buffer_stream_pull(grpc_byte_stream* byte_stream,
                                             grpc_slice* slice) {
   grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
   if (stream->shutdown_error != GRPC_ERROR_NONE) {
@@ -74,18 +67,16 @@
   return GRPC_ERROR_NONE;
 }
 
-static void slice_buffer_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                                         grpc_byte_stream* byte_stream,
+static void slice_buffer_stream_shutdown(grpc_byte_stream* byte_stream,
                                          grpc_error* error) {
   grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
   GRPC_ERROR_UNREF(stream->shutdown_error);
   stream->shutdown_error = error;
 }
 
-static void slice_buffer_stream_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_byte_stream* byte_stream) {
+static void slice_buffer_stream_destroy(grpc_byte_stream* byte_stream) {
   grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
-  grpc_slice_buffer_reset_and_unref_internal(exec_ctx, stream->backing_buffer);
+  grpc_slice_buffer_reset_and_unref_internal(stream->backing_buffer);
   GRPC_ERROR_UNREF(stream->shutdown_error);
 }
 
@@ -113,25 +104,22 @@
   grpc_slice_buffer_init(&cache->cache_buffer);
 }
 
-void grpc_byte_stream_cache_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_byte_stream_cache* cache) {
-  grpc_byte_stream_destroy(exec_ctx, cache->underlying_stream);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &cache->cache_buffer);
+void grpc_byte_stream_cache_destroy(grpc_byte_stream_cache* cache) {
+  grpc_byte_stream_destroy(cache->underlying_stream);
+  grpc_slice_buffer_destroy_internal(&cache->cache_buffer);
 }
 
-static bool caching_byte_stream_next(grpc_exec_ctx* exec_ctx,
-                                     grpc_byte_stream* byte_stream,
+static bool caching_byte_stream_next(grpc_byte_stream* byte_stream,
                                      size_t max_size_hint,
                                      grpc_closure* on_complete) {
   grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
   if (stream->shutdown_error != GRPC_ERROR_NONE) return true;
   if (stream->cursor < stream->cache->cache_buffer.count) return true;
-  return grpc_byte_stream_next(exec_ctx, stream->cache->underlying_stream,
-                               max_size_hint, on_complete);
+  return grpc_byte_stream_next(stream->cache->underlying_stream, max_size_hint,
+                               on_complete);
 }
 
-static grpc_error* caching_byte_stream_pull(grpc_exec_ctx* exec_ctx,
-                                            grpc_byte_stream* byte_stream,
+static grpc_error* caching_byte_stream_pull(grpc_byte_stream* byte_stream,
                                             grpc_slice* slice) {
   grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
   if (stream->shutdown_error != GRPC_ERROR_NONE) {
@@ -144,7 +132,7 @@
     return GRPC_ERROR_NONE;
   }
   grpc_error* error =
-      grpc_byte_stream_pull(exec_ctx, stream->cache->underlying_stream, slice);
+      grpc_byte_stream_pull(stream->cache->underlying_stream, slice);
   if (error == GRPC_ERROR_NONE) {
     ++stream->cursor;
     grpc_slice_buffer_add(&stream->cache->cache_buffer,
@@ -153,17 +141,15 @@
   return error;
 }
 
-static void caching_byte_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                                         grpc_byte_stream* byte_stream,
+static void caching_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                          grpc_error* error) {
   grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
   GRPC_ERROR_UNREF(stream->shutdown_error);
   stream->shutdown_error = GRPC_ERROR_REF(error);
-  grpc_byte_stream_shutdown(exec_ctx, stream->cache->underlying_stream, error);
+  grpc_byte_stream_shutdown(stream->cache->underlying_stream, error);
 }
 
-static void caching_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
-                                        grpc_byte_stream* byte_stream) {
+static void caching_byte_stream_destroy(grpc_byte_stream* byte_stream) {
   grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
   GRPC_ERROR_UNREF(stream->shutdown_error);
 }
diff --git a/src/core/lib/transport/byte_stream.h b/src/core/lib/transport/byte_stream.h
index 6bca154..52c7a07 100644
--- a/src/core/lib/transport/byte_stream.h
+++ b/src/core/lib/transport/byte_stream.h
@@ -31,13 +31,11 @@
 typedef struct grpc_byte_stream grpc_byte_stream;
 
 typedef struct {
-  bool (*next)(grpc_exec_ctx* exec_ctx, grpc_byte_stream* byte_stream,
-               size_t max_size_hint, grpc_closure* on_complete);
-  grpc_error* (*pull)(grpc_exec_ctx* exec_ctx, grpc_byte_stream* byte_stream,
-                      grpc_slice* slice);
-  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_byte_stream* byte_stream,
-                   grpc_error* error);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_byte_stream* byte_stream);
+  bool (*next)(grpc_byte_stream* byte_stream, size_t max_size_hint,
+               grpc_closure* on_complete);
+  grpc_error* (*pull)(grpc_byte_stream* byte_stream, grpc_slice* slice);
+  void (*shutdown)(grpc_byte_stream* byte_stream, grpc_error* error);
+  void (*destroy)(grpc_byte_stream* byte_stream);
 } grpc_byte_stream_vtable;
 
 struct grpc_byte_stream {
@@ -52,8 +50,7 @@
 //
 // max_size_hint can be set as a hint as to the maximum number
 // of bytes that would be acceptable to read.
-bool grpc_byte_stream_next(grpc_exec_ctx* exec_ctx,
-                           grpc_byte_stream* byte_stream, size_t max_size_hint,
+bool grpc_byte_stream_next(grpc_byte_stream* byte_stream, size_t max_size_hint,
                            grpc_closure* on_complete);
 
 // Returns the next slice in the byte stream when it is ready (indicated by
@@ -61,8 +58,7 @@
 // grpc_byte_stream_next is called).
 //
 // Once a slice is returned into *slice, it is owned by the caller.
-grpc_error* grpc_byte_stream_pull(grpc_exec_ctx* exec_ctx,
-                                  grpc_byte_stream* byte_stream,
+grpc_error* grpc_byte_stream_pull(grpc_byte_stream* byte_stream,
                                   grpc_slice* slice);
 
 // Shuts down the byte stream.
@@ -72,12 +68,10 @@
 //
 // The next call to grpc_byte_stream_pull() (if any) will return the error
 // passed to grpc_byte_stream_shutdown().
-void grpc_byte_stream_shutdown(grpc_exec_ctx* exec_ctx,
-                               grpc_byte_stream* byte_stream,
+void grpc_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                grpc_error* error);
 
-void grpc_byte_stream_destroy(grpc_exec_ctx* exec_ctx,
-                              grpc_byte_stream* byte_stream);
+void grpc_byte_stream_destroy(grpc_byte_stream* byte_stream);
 
 // grpc_slice_buffer_stream
 //
@@ -119,8 +113,7 @@
                                  grpc_byte_stream* underlying_stream);
 
 // Must not be called while still in use by a grpc_caching_byte_stream.
-void grpc_byte_stream_cache_destroy(grpc_exec_ctx* exec_ctx,
-                                    grpc_byte_stream_cache* cache);
+void grpc_byte_stream_cache_destroy(grpc_byte_stream_cache* cache);
 
 typedef struct {
   grpc_byte_stream base;
diff --git a/src/core/lib/transport/connectivity_state.cc b/src/core/lib/transport/connectivity_state.cc
index e7e5dbd..c42cc9c 100644
--- a/src/core/lib/transport/connectivity_state.cc
+++ b/src/core/lib/transport/connectivity_state.cc
@@ -51,8 +51,7 @@
   tracker->name = gpr_strdup(name);
 }
 
-void grpc_connectivity_state_destroy(grpc_exec_ctx* exec_ctx,
-                                     grpc_connectivity_state_tracker* tracker) {
+void grpc_connectivity_state_destroy(grpc_connectivity_state_tracker* tracker) {
   grpc_error* error;
   grpc_connectivity_state_watcher* w;
   while ((w = tracker->watchers)) {
@@ -65,7 +64,7 @@
       error =
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("Shutdown connectivity owner");
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, w->notify, error);
+    GRPC_CLOSURE_SCHED(w->notify, error);
     gpr_free(w);
   }
   GRPC_ERROR_UNREF(tracker->current_error);
@@ -105,8 +104,8 @@
 }
 
 bool grpc_connectivity_state_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_connectivity_state_tracker* tracker,
-    grpc_connectivity_state* current, grpc_closure* notify) {
+    grpc_connectivity_state_tracker* tracker, grpc_connectivity_state* current,
+    grpc_closure* notify) {
   grpc_connectivity_state cur =
       (grpc_connectivity_state)gpr_atm_no_barrier_load(
           &tracker->current_state_atm);
@@ -123,7 +122,7 @@
   if (current == nullptr) {
     grpc_connectivity_state_watcher* w = tracker->watchers;
     if (w != nullptr && w->notify == notify) {
-      GRPC_CLOSURE_SCHED(exec_ctx, notify, GRPC_ERROR_CANCELLED);
+      GRPC_CLOSURE_SCHED(notify, GRPC_ERROR_CANCELLED);
       tracker->watchers = w->next;
       gpr_free(w);
       return false;
@@ -131,7 +130,7 @@
     while (w != nullptr) {
       grpc_connectivity_state_watcher* rm_candidate = w->next;
       if (rm_candidate != nullptr && rm_candidate->notify == notify) {
-        GRPC_CLOSURE_SCHED(exec_ctx, notify, GRPC_ERROR_CANCELLED);
+        GRPC_CLOSURE_SCHED(notify, GRPC_ERROR_CANCELLED);
         w->next = w->next->next;
         gpr_free(rm_candidate);
         return false;
@@ -142,8 +141,7 @@
   } else {
     if (cur != *current) {
       *current = cur;
-      GRPC_CLOSURE_SCHED(exec_ctx, notify,
-                         GRPC_ERROR_REF(tracker->current_error));
+      GRPC_CLOSURE_SCHED(notify, GRPC_ERROR_REF(tracker->current_error));
     } else {
       grpc_connectivity_state_watcher* w =
           (grpc_connectivity_state_watcher*)gpr_malloc(sizeof(*w));
@@ -156,8 +154,7 @@
   }
 }
 
-void grpc_connectivity_state_set(grpc_exec_ctx* exec_ctx,
-                                 grpc_connectivity_state_tracker* tracker,
+void grpc_connectivity_state_set(grpc_connectivity_state_tracker* tracker,
                                  grpc_connectivity_state state,
                                  grpc_error* error, const char* reason) {
   grpc_connectivity_state cur =
@@ -195,8 +192,7 @@
       gpr_log(GPR_DEBUG, "NOTIFY: %p %s: %p", tracker, tracker->name,
               w->notify);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, w->notify,
-                       GRPC_ERROR_REF(tracker->current_error));
+    GRPC_CLOSURE_SCHED(w->notify, GRPC_ERROR_REF(tracker->current_error));
     gpr_free(w);
   }
 }
diff --git a/src/core/lib/transport/connectivity_state.h b/src/core/lib/transport/connectivity_state.h
index 653637e..c3a50f3 100644
--- a/src/core/lib/transport/connectivity_state.h
+++ b/src/core/lib/transport/connectivity_state.h
@@ -51,13 +51,11 @@
 void grpc_connectivity_state_init(grpc_connectivity_state_tracker* tracker,
                                   grpc_connectivity_state init_state,
                                   const char* name);
-void grpc_connectivity_state_destroy(grpc_exec_ctx* exec_ctx,
-                                     grpc_connectivity_state_tracker* tracker);
+void grpc_connectivity_state_destroy(grpc_connectivity_state_tracker* tracker);
 
 /** Set connectivity state; not thread safe; access must be serialized with an
  *  external lock */
-void grpc_connectivity_state_set(grpc_exec_ctx* exec_ctx,
-                                 grpc_connectivity_state_tracker* tracker,
+void grpc_connectivity_state_set(grpc_connectivity_state_tracker* tracker,
                                  grpc_connectivity_state state,
                                  grpc_error* associated_error,
                                  const char* reason);
@@ -81,7 +79,7 @@
     case).
     Access must be serialized with an external lock. */
 bool grpc_connectivity_state_notify_on_state_change(
-    grpc_exec_ctx* exec_ctx, grpc_connectivity_state_tracker* tracker,
-    grpc_connectivity_state* current, grpc_closure* notify);
+    grpc_connectivity_state_tracker* tracker, grpc_connectivity_state* current,
+    grpc_closure* notify);
 
 #endif /* GRPC_CORE_LIB_TRANSPORT_CONNECTIVITY_STATE_H */
diff --git a/src/core/lib/transport/error_utils.cc b/src/core/lib/transport/error_utils.cc
index 69c8ae6..ffaf327 100644
--- a/src/core/lib/transport/error_utils.cc
+++ b/src/core/lib/transport/error_utils.cc
@@ -40,9 +40,9 @@
   return nullptr;
 }
 
-void grpc_error_get_status(grpc_exec_ctx* exec_ctx, grpc_error* error,
-                           grpc_millis deadline, grpc_status_code* code,
-                           grpc_slice* slice, grpc_http2_error_code* http_error,
+void grpc_error_get_status(grpc_error* error, grpc_millis deadline,
+                           grpc_status_code* code, grpc_slice* slice,
+                           grpc_http2_error_code* http_error,
                            const char** error_string) {
   // Start with the parent error and recurse through the tree of children
   // until we find the first one that has a status code.
@@ -65,8 +65,8 @@
     status = (grpc_status_code)integer;
   } else if (grpc_error_get_int(found_error, GRPC_ERROR_INT_HTTP2_ERROR,
                                 &integer)) {
-    status = grpc_http2_error_to_grpc_status(
-        exec_ctx, (grpc_http2_error_code)integer, deadline);
+    status = grpc_http2_error_to_grpc_status((grpc_http2_error_code)integer,
+                                             deadline);
   }
   if (code != nullptr) *code = status;
 
diff --git a/src/core/lib/transport/error_utils.h b/src/core/lib/transport/error_utils.h
index 8b006ae..4100f65 100644
--- a/src/core/lib/transport/error_utils.h
+++ b/src/core/lib/transport/error_utils.h
@@ -30,9 +30,8 @@
 /// be populated with the entire error string. If any of the attributes (code,
 /// msg, http_status, error_string) are unneeded, they can be passed as
 /// NULL.
-void grpc_error_get_status(grpc_exec_ctx* exec_ctx, grpc_error* error,
-                           grpc_millis deadline, grpc_status_code* code,
-                           grpc_slice* slice,
+void grpc_error_get_status(grpc_error* error, grpc_millis deadline,
+                           grpc_status_code* code, grpc_slice* slice,
                            grpc_http2_error_code* http_status,
                            const char** error_string);
 
diff --git a/src/core/lib/transport/metadata.cc b/src/core/lib/transport/metadata.cc
index 0f30c75..5f0673e 100644
--- a/src/core/lib/transport/metadata.cc
+++ b/src/core/lib/transport/metadata.cc
@@ -108,7 +108,7 @@
 
 static mdtab_shard g_shards[SHARD_COUNT];
 
-static void gc_mdtab(grpc_exec_ctx* exec_ctx, mdtab_shard* shard);
+static void gc_mdtab(mdtab_shard* shard);
 
 void grpc_mdctx_global_init(void) {
   /* initialize shards */
@@ -123,11 +123,11 @@
   }
 }
 
-void grpc_mdctx_global_shutdown(grpc_exec_ctx* exec_ctx) {
+void grpc_mdctx_global_shutdown() {
   for (size_t i = 0; i < SHARD_COUNT; i++) {
     mdtab_shard* shard = &g_shards[i];
     gpr_mu_destroy(&shard->mu);
-    gc_mdtab(exec_ctx, shard);
+    gc_mdtab(shard);
     /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */
     if (shard->count != 0) {
       gpr_log(GPR_DEBUG, "WARNING: %" PRIuPTR " metadata elements were leaked",
@@ -165,7 +165,7 @@
   }
 }
 
-static void gc_mdtab(grpc_exec_ctx* exec_ctx, mdtab_shard* shard) {
+static void gc_mdtab(mdtab_shard* shard) {
   size_t i;
   interned_metadata** prev_next;
   interned_metadata *md, *next;
@@ -178,8 +178,8 @@
       void* user_data = (void*)gpr_atm_no_barrier_load(&md->user_data);
       next = md->bucket_next;
       if (gpr_atm_acq_load(&md->refcnt) == 0) {
-        grpc_slice_unref_internal(exec_ctx, md->key);
-        grpc_slice_unref_internal(exec_ctx, md->value);
+        grpc_slice_unref_internal(md->key);
+        grpc_slice_unref_internal(md->value);
         if (md->user_data) {
           ((destroy_user_data_func)gpr_atm_no_barrier_load(
               &md->destroy_user_data))(user_data);
@@ -228,17 +228,17 @@
   GPR_TIMER_END("grow_mdtab", 0);
 }
 
-static void rehash_mdtab(grpc_exec_ctx* exec_ctx, mdtab_shard* shard) {
+static void rehash_mdtab(mdtab_shard* shard) {
   if (gpr_atm_no_barrier_load(&shard->free_estimate) >
       (gpr_atm)(shard->capacity / 4)) {
-    gc_mdtab(exec_ctx, shard);
+    gc_mdtab(shard);
   } else {
     grow_mdtab(shard);
   }
 }
 
 grpc_mdelem grpc_mdelem_create(
-    grpc_exec_ctx* exec_ctx, grpc_slice key, grpc_slice value,
+    grpc_slice key, grpc_slice value,
     grpc_mdelem_data* compatible_external_backing_store) {
   if (!grpc_slice_is_interned(key) || !grpc_slice_is_interned(value)) {
     if (compatible_external_backing_store != nullptr) {
@@ -318,7 +318,7 @@
   shard->count++;
 
   if (shard->count > shard->capacity * 2) {
-    rehash_mdtab(exec_ctx, shard);
+    rehash_mdtab(shard);
   }
 
   gpr_mu_unlock(&shard->mu);
@@ -328,22 +328,20 @@
   return GRPC_MAKE_MDELEM(md, GRPC_MDELEM_STORAGE_INTERNED);
 }
 
-grpc_mdelem grpc_mdelem_from_slices(grpc_exec_ctx* exec_ctx, grpc_slice key,
-                                    grpc_slice value) {
-  grpc_mdelem out = grpc_mdelem_create(exec_ctx, key, value, nullptr);
-  grpc_slice_unref_internal(exec_ctx, key);
-  grpc_slice_unref_internal(exec_ctx, value);
+grpc_mdelem grpc_mdelem_from_slices(grpc_slice key, grpc_slice value) {
+  grpc_mdelem out = grpc_mdelem_create(key, value, nullptr);
+  grpc_slice_unref_internal(key);
+  grpc_slice_unref_internal(value);
   return out;
 }
 
-grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_exec_ctx* exec_ctx,
-                                           grpc_metadata* metadata) {
+grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_metadata* metadata) {
   bool changed = false;
   grpc_slice key_slice =
       grpc_slice_maybe_static_intern(metadata->key, &changed);
   grpc_slice value_slice =
       grpc_slice_maybe_static_intern(metadata->value, &changed);
-  return grpc_mdelem_create(exec_ctx, key_slice, value_slice,
+  return grpc_mdelem_create(key_slice, value_slice,
                             changed ? nullptr : (grpc_mdelem_data*)metadata);
 }
 
@@ -417,7 +415,7 @@
   return gmd;
 }
 
-void grpc_mdelem_unref(grpc_exec_ctx* exec_ctx, grpc_mdelem gmd DEBUG_ARGS) {
+void grpc_mdelem_unref(grpc_mdelem gmd DEBUG_ARGS) {
   switch (GRPC_MDELEM_STORAGE(gmd)) {
     case GRPC_MDELEM_STORAGE_EXTERNAL:
     case GRPC_MDELEM_STORAGE_STATIC:
@@ -465,8 +463,8 @@
       const gpr_atm prev_refcount = gpr_atm_full_fetch_add(&md->refcnt, -1);
       GPR_ASSERT(prev_refcount >= 1);
       if (1 == prev_refcount) {
-        grpc_slice_unref_internal(exec_ctx, md->key);
-        grpc_slice_unref_internal(exec_ctx, md->value);
+        grpc_slice_unref_internal(md->key);
+        grpc_slice_unref_internal(md->value);
         gpr_free(md);
       }
       break;
diff --git a/src/core/lib/transport/metadata.h b/src/core/lib/transport/metadata.h
index 8d4868d..78e6bef 100644
--- a/src/core/lib/transport/metadata.h
+++ b/src/core/lib/transport/metadata.h
@@ -107,20 +107,18 @@
                               (uintptr_t)GRPC_MDELEM_STORAGE_INTERNED_BIT))
 
 /* Unrefs the slices. */
-grpc_mdelem grpc_mdelem_from_slices(grpc_exec_ctx* exec_ctx, grpc_slice key,
-                                    grpc_slice value);
+grpc_mdelem grpc_mdelem_from_slices(grpc_slice key, grpc_slice value);
 
 /* Cheaply convert a grpc_metadata to a grpc_mdelem; may use the grpc_metadata
    object as backing storage (so lifetimes should align) */
-grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_exec_ctx* exec_ctx,
-                                           grpc_metadata* metadata);
+grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_metadata* metadata);
 
 /* Does not unref the slices; if a new non-interned mdelem is needed, allocates
    one if compatible_external_backing_store is NULL, or uses
    compatible_external_backing_store if it is non-NULL (in which case it's the
    users responsibility to ensure that it outlives usage) */
 grpc_mdelem grpc_mdelem_create(
-    grpc_exec_ctx* exec_ctx, grpc_slice key, grpc_slice value,
+    grpc_slice key, grpc_slice value,
     grpc_mdelem_data* compatible_external_backing_store);
 
 bool grpc_mdelem_eq(grpc_mdelem a, grpc_mdelem b);
@@ -136,16 +134,14 @@
 
 #ifndef NDEBUG
 #define GRPC_MDELEM_REF(s) grpc_mdelem_ref((s), __FILE__, __LINE__)
-#define GRPC_MDELEM_UNREF(exec_ctx, s) \
-  grpc_mdelem_unref((exec_ctx), (s), __FILE__, __LINE__)
+#define GRPC_MDELEM_UNREF(s) grpc_mdelem_unref((s), __FILE__, __LINE__)
 grpc_mdelem grpc_mdelem_ref(grpc_mdelem md, const char* file, int line);
-void grpc_mdelem_unref(grpc_exec_ctx* exec_ctx, grpc_mdelem md,
-                       const char* file, int line);
+void grpc_mdelem_unref(grpc_mdelem md, const char* file, int line);
 #else
 #define GRPC_MDELEM_REF(s) grpc_mdelem_ref((s))
-#define GRPC_MDELEM_UNREF(exec_ctx, s) grpc_mdelem_unref((exec_ctx), (s))
+#define GRPC_MDELEM_UNREF(s) grpc_mdelem_unref((s))
 grpc_mdelem grpc_mdelem_ref(grpc_mdelem md);
-void grpc_mdelem_unref(grpc_exec_ctx* exec_ctx, grpc_mdelem md);
+void grpc_mdelem_unref(grpc_mdelem md);
 #endif
 
 #define GRPC_MDKEY(md) (GRPC_MDELEM_DATA(md)->key)
@@ -162,6 +158,6 @@
 #define GRPC_MDSTR_KV_HASH(k_hash, v_hash) (GPR_ROTL((k_hash), 2) ^ (v_hash))
 
 void grpc_mdctx_global_init(void);
-void grpc_mdctx_global_shutdown(grpc_exec_ctx* exec_ctx);
+void grpc_mdctx_global_shutdown();
 
 #endif /* GRPC_CORE_LIB_TRANSPORT_METADATA_H */
diff --git a/src/core/lib/transport/metadata_batch.cc b/src/core/lib/transport/metadata_batch.cc
index 5817765..9c95339 100644
--- a/src/core/lib/transport/metadata_batch.cc
+++ b/src/core/lib/transport/metadata_batch.cc
@@ -51,8 +51,7 @@
 #endif /* NDEBUG */
 }
 
-static void assert_valid_callouts(grpc_exec_ctx* exec_ctx,
-                                  grpc_metadata_batch* batch) {
+static void assert_valid_callouts(grpc_metadata_batch* batch) {
 #ifndef NDEBUG
   for (grpc_linked_mdelem* l = batch->list.head; l != nullptr; l = l->next) {
     grpc_slice key_interned = grpc_slice_intern(GRPC_MDKEY(l->md));
@@ -61,7 +60,7 @@
     if (callout_idx != GRPC_BATCH_CALLOUTS_COUNT) {
       GPR_ASSERT(batch->idx.array[callout_idx] == l);
     }
-    grpc_slice_unref_internal(exec_ctx, key_interned);
+    grpc_slice_unref_internal(key_interned);
   }
 #endif
 }
@@ -77,11 +76,10 @@
   batch->deadline = GRPC_MILLIS_INF_FUTURE;
 }
 
-void grpc_metadata_batch_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_metadata_batch* batch) {
+void grpc_metadata_batch_destroy(grpc_metadata_batch* batch) {
   grpc_linked_mdelem* l;
   for (l = batch->list.head; l; l = l->next) {
-    GRPC_MDELEM_UNREF(exec_ctx, l->md);
+    GRPC_MDELEM_UNREF(l->md);
   }
 }
 
@@ -126,13 +124,12 @@
   batch->idx.array[idx] = nullptr;
 }
 
-grpc_error* grpc_metadata_batch_add_head(grpc_exec_ctx* exec_ctx,
-                                         grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_add_head(grpc_metadata_batch* batch,
                                          grpc_linked_mdelem* storage,
                                          grpc_mdelem elem_to_add) {
   GPR_ASSERT(!GRPC_MDISNULL(elem_to_add));
   storage->md = elem_to_add;
-  return grpc_metadata_batch_link_head(exec_ctx, batch, storage);
+  return grpc_metadata_batch_link_head(batch, storage);
 }
 
 static void link_head(grpc_mdelem_list* list, grpc_linked_mdelem* storage) {
@@ -150,27 +147,25 @@
   assert_valid_list(list);
 }
 
-grpc_error* grpc_metadata_batch_link_head(grpc_exec_ctx* exec_ctx,
-                                          grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_link_head(grpc_metadata_batch* batch,
                                           grpc_linked_mdelem* storage) {
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   grpc_error* err = maybe_link_callout(batch, storage);
   if (err != GRPC_ERROR_NONE) {
-    assert_valid_callouts(exec_ctx, batch);
+    assert_valid_callouts(batch);
     return err;
   }
   link_head(&batch->list, storage);
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   return GRPC_ERROR_NONE;
 }
 
-grpc_error* grpc_metadata_batch_add_tail(grpc_exec_ctx* exec_ctx,
-                                         grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_add_tail(grpc_metadata_batch* batch,
                                          grpc_linked_mdelem* storage,
                                          grpc_mdelem elem_to_add) {
   GPR_ASSERT(!GRPC_MDISNULL(elem_to_add));
   storage->md = elem_to_add;
-  return grpc_metadata_batch_link_tail(exec_ctx, batch, storage);
+  return grpc_metadata_batch_link_tail(batch, storage);
 }
 
 static void link_tail(grpc_mdelem_list* list, grpc_linked_mdelem* storage) {
@@ -189,17 +184,16 @@
   assert_valid_list(list);
 }
 
-grpc_error* grpc_metadata_batch_link_tail(grpc_exec_ctx* exec_ctx,
-                                          grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_link_tail(grpc_metadata_batch* batch,
                                           grpc_linked_mdelem* storage) {
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   grpc_error* err = maybe_link_callout(batch, storage);
   if (err != GRPC_ERROR_NONE) {
-    assert_valid_callouts(exec_ctx, batch);
+    assert_valid_callouts(batch);
     return err;
   }
   link_tail(&batch->list, storage);
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   return GRPC_ERROR_NONE;
 }
 
@@ -220,31 +214,28 @@
   assert_valid_list(list);
 }
 
-void grpc_metadata_batch_remove(grpc_exec_ctx* exec_ctx,
-                                grpc_metadata_batch* batch,
+void grpc_metadata_batch_remove(grpc_metadata_batch* batch,
                                 grpc_linked_mdelem* storage) {
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   maybe_unlink_callout(batch, storage);
   unlink_storage(&batch->list, storage);
-  GRPC_MDELEM_UNREF(exec_ctx, storage->md);
-  assert_valid_callouts(exec_ctx, batch);
+  GRPC_MDELEM_UNREF(storage->md);
+  assert_valid_callouts(batch);
 }
 
-void grpc_metadata_batch_set_value(grpc_exec_ctx* exec_ctx,
-                                   grpc_linked_mdelem* storage,
+void grpc_metadata_batch_set_value(grpc_linked_mdelem* storage,
                                    grpc_slice value) {
   grpc_mdelem old_mdelem = storage->md;
   grpc_mdelem new_mdelem = grpc_mdelem_from_slices(
-      exec_ctx, grpc_slice_ref_internal(GRPC_MDKEY(old_mdelem)), value);
+      grpc_slice_ref_internal(GRPC_MDKEY(old_mdelem)), value);
   storage->md = new_mdelem;
-  GRPC_MDELEM_UNREF(exec_ctx, old_mdelem);
+  GRPC_MDELEM_UNREF(old_mdelem);
 }
 
-grpc_error* grpc_metadata_batch_substitute(grpc_exec_ctx* exec_ctx,
-                                           grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_substitute(grpc_metadata_batch* batch,
                                            grpc_linked_mdelem* storage,
                                            grpc_mdelem new_mdelem) {
-  assert_valid_callouts(exec_ctx, batch);
+  assert_valid_callouts(batch);
   grpc_error* error = GRPC_ERROR_NONE;
   grpc_mdelem old_mdelem = storage->md;
   if (!grpc_slice_eq(GRPC_MDKEY(new_mdelem), GRPC_MDKEY(old_mdelem))) {
@@ -253,19 +244,18 @@
     error = maybe_link_callout(batch, storage);
     if (error != GRPC_ERROR_NONE) {
       unlink_storage(&batch->list, storage);
-      GRPC_MDELEM_UNREF(exec_ctx, storage->md);
+      GRPC_MDELEM_UNREF(storage->md);
     }
   } else {
     storage->md = new_mdelem;
   }
-  GRPC_MDELEM_UNREF(exec_ctx, old_mdelem);
-  assert_valid_callouts(exec_ctx, batch);
+  GRPC_MDELEM_UNREF(old_mdelem);
+  assert_valid_callouts(batch);
   return error;
 }
 
-void grpc_metadata_batch_clear(grpc_exec_ctx* exec_ctx,
-                               grpc_metadata_batch* batch) {
-  grpc_metadata_batch_destroy(exec_ctx, batch);
+void grpc_metadata_batch_clear(grpc_metadata_batch* batch) {
+  grpc_metadata_batch_destroy(batch);
   grpc_metadata_batch_init(batch);
 }
 
@@ -292,8 +282,7 @@
   *composite = grpc_error_add_child(*composite, error);
 }
 
-grpc_error* grpc_metadata_batch_filter(grpc_exec_ctx* exec_ctx,
-                                       grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_filter(grpc_metadata_batch* batch,
                                        grpc_metadata_batch_filter_func func,
                                        void* user_data,
                                        const char* composite_error_string) {
@@ -301,12 +290,12 @@
   grpc_error* error = GRPC_ERROR_NONE;
   while (l) {
     grpc_linked_mdelem* next = l->next;
-    grpc_filtered_mdelem new_mdelem = func(exec_ctx, user_data, l->md);
+    grpc_filtered_mdelem new_mdelem = func(user_data, l->md);
     add_error(&error, new_mdelem.error, composite_error_string);
     if (GRPC_MDISNULL(new_mdelem.md)) {
-      grpc_metadata_batch_remove(exec_ctx, batch, l);
+      grpc_metadata_batch_remove(batch, l);
     } else if (new_mdelem.md.payload != l->md.payload) {
-      grpc_metadata_batch_substitute(exec_ctx, batch, l, new_mdelem.md);
+      grpc_metadata_batch_substitute(batch, l, new_mdelem.md);
     }
     l = next;
   }
diff --git a/src/core/lib/transport/metadata_batch.h b/src/core/lib/transport/metadata_batch.h
index adfb2d8..8353a42 100644
--- a/src/core/lib/transport/metadata_batch.h
+++ b/src/core/lib/transport/metadata_batch.h
@@ -53,28 +53,23 @@
 } grpc_metadata_batch;
 
 void grpc_metadata_batch_init(grpc_metadata_batch* batch);
-void grpc_metadata_batch_destroy(grpc_exec_ctx* exec_ctx,
-                                 grpc_metadata_batch* batch);
-void grpc_metadata_batch_clear(grpc_exec_ctx* exec_ctx,
-                               grpc_metadata_batch* batch);
+void grpc_metadata_batch_destroy(grpc_metadata_batch* batch);
+void grpc_metadata_batch_clear(grpc_metadata_batch* batch);
 bool grpc_metadata_batch_is_empty(grpc_metadata_batch* batch);
 
 /* Returns the transport size of the batch. */
 size_t grpc_metadata_batch_size(grpc_metadata_batch* batch);
 
 /** Remove \a storage from the batch, unreffing the mdelem contained */
-void grpc_metadata_batch_remove(grpc_exec_ctx* exec_ctx,
-                                grpc_metadata_batch* batch,
+void grpc_metadata_batch_remove(grpc_metadata_batch* batch,
                                 grpc_linked_mdelem* storage);
 
 /** Substitute a new mdelem for an old value */
-grpc_error* grpc_metadata_batch_substitute(grpc_exec_ctx* exec_ctx,
-                                           grpc_metadata_batch* batch,
+grpc_error* grpc_metadata_batch_substitute(grpc_metadata_batch* batch,
                                            grpc_linked_mdelem* storage,
                                            grpc_mdelem new_value);
 
-void grpc_metadata_batch_set_value(grpc_exec_ctx* exec_ctx,
-                                   grpc_linked_mdelem* storage,
+void grpc_metadata_batch_set_value(grpc_linked_mdelem* storage,
                                    grpc_slice value);
 
 /** Add \a storage to the beginning of \a batch. storage->md is
@@ -82,17 +77,17 @@
     \a storage is owned by the caller and must survive for the
     lifetime of batch. This usually means it should be around
     for the lifetime of the call. */
-grpc_error* grpc_metadata_batch_link_head(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_linked_mdelem* storage) GRPC_MUST_USE_RESULT;
+grpc_error* grpc_metadata_batch_link_head(grpc_metadata_batch* batch,
+                                          grpc_linked_mdelem* storage)
+    GRPC_MUST_USE_RESULT;
 /** Add \a storage to the end of \a batch. storage->md is
     assumed to be valid.
     \a storage is owned by the caller and must survive for the
     lifetime of batch. This usually means it should be around
     for the lifetime of the call. */
-grpc_error* grpc_metadata_batch_link_tail(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_linked_mdelem* storage) GRPC_MUST_USE_RESULT;
+grpc_error* grpc_metadata_batch_link_tail(grpc_metadata_batch* batch,
+                                          grpc_linked_mdelem* storage)
+    GRPC_MUST_USE_RESULT;
 
 /** Add \a elem_to_add as the first element in \a batch, using
     \a storage as backing storage for the linked list element.
@@ -101,8 +96,8 @@
     for the lifetime of the call.
     Takes ownership of \a elem_to_add */
 grpc_error* grpc_metadata_batch_add_head(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_linked_mdelem* storage, grpc_mdelem elem_to_add) GRPC_MUST_USE_RESULT;
+    grpc_metadata_batch* batch, grpc_linked_mdelem* storage,
+    grpc_mdelem elem_to_add) GRPC_MUST_USE_RESULT;
 /** Add \a elem_to_add as the last element in \a batch, using
     \a storage as backing storage for the linked list element.
     \a storage is owned by the caller and must survive for the
@@ -110,8 +105,8 @@
     for the lifetime of the call.
     Takes ownership of \a elem_to_add */
 grpc_error* grpc_metadata_batch_add_tail(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_linked_mdelem* storage, grpc_mdelem elem_to_add) GRPC_MUST_USE_RESULT;
+    grpc_metadata_batch* batch, grpc_linked_mdelem* storage,
+    grpc_mdelem elem_to_add) GRPC_MUST_USE_RESULT;
 
 grpc_error* grpc_attach_md_to_error(grpc_error* src, grpc_mdelem md);
 
@@ -128,11 +123,10 @@
   { GRPC_ERROR_NONE, GRPC_MDNULL }
 
 typedef grpc_filtered_mdelem (*grpc_metadata_batch_filter_func)(
-    grpc_exec_ctx* exec_ctx, void* user_data, grpc_mdelem elem);
+    void* user_data, grpc_mdelem elem);
 grpc_error* grpc_metadata_batch_filter(
-    grpc_exec_ctx* exec_ctx, grpc_metadata_batch* batch,
-    grpc_metadata_batch_filter_func func, void* user_data,
-    const char* composite_error_string) GRPC_MUST_USE_RESULT;
+    grpc_metadata_batch* batch, grpc_metadata_batch_filter_func func,
+    void* user_data, const char* composite_error_string) GRPC_MUST_USE_RESULT;
 
 #ifndef NDEBUG
 void grpc_metadata_batch_assert_ok(grpc_metadata_batch* comd);
diff --git a/src/core/lib/transport/service_config.cc b/src/core/lib/transport/service_config.cc
index adcec8c..cbafc33 100644
--- a/src/core/lib/transport/service_config.cc
+++ b/src/core/lib/transport/service_config.cc
@@ -152,10 +152,8 @@
 // each name found, incrementing \a idx for each entry added.
 // Returns false on error.
 static bool parse_json_method_config(
-    grpc_exec_ctx* exec_ctx, grpc_json* json,
-    void* (*create_value)(const grpc_json* method_config_json),
-    void* (*ref_value)(void* value),
-    void (*unref_value)(grpc_exec_ctx* exec_ctx, void* value),
+    grpc_json* json, void* (*create_value)(const grpc_json* method_config_json),
+    void* (*ref_value)(void* value), void (*unref_value)(void* value),
     grpc_slice_hash_table_entry* entries, size_t* idx) {
   // Construct value.
   void* method_config = create_value(json);
@@ -184,16 +182,15 @@
   }
   success = true;
 done:
-  unref_value(exec_ctx, method_config);
+  unref_value(method_config);
   gpr_strvec_destroy(&paths);
   return success;
 }
 
 grpc_slice_hash_table* grpc_service_config_create_method_config_table(
-    grpc_exec_ctx* exec_ctx, const grpc_service_config* service_config,
+    const grpc_service_config* service_config,
     void* (*create_value)(const grpc_json* method_config_json),
-    void* (*ref_value)(void* value),
-    void (*unref_value)(grpc_exec_ctx* exec_ctx, void* value)) {
+    void* (*ref_value)(void* value), void (*unref_value)(void* value)) {
   const grpc_json* json = service_config->json_tree;
   // Traverse parsed JSON tree.
   if (json->type != GRPC_JSON_OBJECT || json->key != nullptr) return nullptr;
@@ -217,11 +214,11 @@
       size_t idx = 0;
       for (grpc_json* method = field->child; method != nullptr;
            method = method->next) {
-        if (!parse_json_method_config(exec_ctx, method, create_value, ref_value,
+        if (!parse_json_method_config(method, create_value, ref_value,
                                       unref_value, entries, &idx)) {
           for (size_t i = 0; i < idx; ++i) {
-            grpc_slice_unref_internal(exec_ctx, entries[i].key);
-            unref_value(exec_ctx, entries[i].value);
+            grpc_slice_unref_internal(entries[i].key);
+            unref_value(entries[i].value);
           }
           gpr_free(entries);
           return nullptr;
@@ -240,8 +237,7 @@
   return method_config_table;
 }
 
-void* grpc_method_config_table_get(grpc_exec_ctx* exec_ctx,
-                                   const grpc_slice_hash_table* table,
+void* grpc_method_config_table_get(const grpc_slice_hash_table* table,
                                    grpc_slice path) {
   void* value = grpc_slice_hash_table_get(table, path);
   // If we didn't find a match for the path, try looking for a wildcard
@@ -257,7 +253,7 @@
     grpc_slice wildcard_path = grpc_slice_from_copied_string(buf);
     gpr_free(buf);
     value = grpc_slice_hash_table_get(table, wildcard_path);
-    grpc_slice_unref_internal(exec_ctx, wildcard_path);
+    grpc_slice_unref_internal(wildcard_path);
     gpr_free(path_str);
   }
   return value;
diff --git a/src/core/lib/transport/service_config.h b/src/core/lib/transport/service_config.h
index 75a290b..98554b9 100644
--- a/src/core/lib/transport/service_config.h
+++ b/src/core/lib/transport/service_config.h
@@ -45,10 +45,9 @@
 /// \a ref_value() and \a unref_value() are used to ref and unref values.
 /// Returns NULL on error.
 grpc_slice_hash_table* grpc_service_config_create_method_config_table(
-    grpc_exec_ctx* exec_ctx, const grpc_service_config* service_config,
+    const grpc_service_config* service_config,
     void* (*create_value)(const grpc_json* method_config_json),
-    void* (*ref_value)(void* value),
-    void (*unref_value)(grpc_exec_ctx* exec_ctx, void* value));
+    void* (*ref_value)(void* value), void (*unref_value)(void* value));
 
 /// A helper function for looking up values in the table returned by
 /// \a grpc_service_config_create_method_config_table().
@@ -56,8 +55,7 @@
 /// the form "/service/method".
 /// Returns NULL if the method has no config.
 /// Caller does NOT own a reference to the result.
-void* grpc_method_config_table_get(grpc_exec_ctx* exec_ctx,
-                                   const grpc_slice_hash_table* table,
+void* grpc_method_config_table_get(const grpc_slice_hash_table* table,
                                    grpc_slice path);
 
 #endif /* GRPC_CORE_LIB_TRANSPORT_SERVICE_CONFIG_H */
diff --git a/src/core/lib/transport/static_metadata.cc b/src/core/lib/transport/static_metadata.cc
index 844724c..2213b30 100644
--- a/src/core/lib/transport/static_metadata.cc
+++ b/src/core/lib/transport/static_metadata.cc
@@ -104,7 +104,7 @@
     101, 44,  103, 122, 105, 112};
 
 static void static_ref(void* unused) {}
-static void static_unref(grpc_exec_ctx* exec_ctx, void* unused) {}
+static void static_unref(void* unused) {}
 static const grpc_slice_refcount_vtable static_sub_vtable = {
     static_ref, static_unref, grpc_slice_default_eq_impl,
     grpc_slice_default_hash_impl};
diff --git a/src/core/lib/transport/status_conversion.cc b/src/core/lib/transport/status_conversion.cc
index a0a5f1b..46cba42 100644
--- a/src/core/lib/transport/status_conversion.cc
+++ b/src/core/lib/transport/status_conversion.cc
@@ -37,8 +37,7 @@
   }
 }
 
-grpc_status_code grpc_http2_error_to_grpc_status(grpc_exec_ctx* exec_ctx,
-                                                 grpc_http2_error_code error,
+grpc_status_code grpc_http2_error_to_grpc_status(grpc_http2_error_code error,
                                                  grpc_millis deadline) {
   switch (error) {
     case GRPC_HTTP2_NO_ERROR:
@@ -47,7 +46,7 @@
     case GRPC_HTTP2_CANCEL:
       /* http2 cancel translates to STATUS_CANCELLED iff deadline hasn't been
        * exceeded */
-      return grpc_exec_ctx_now(exec_ctx) > deadline
+      return grpc_core::ExecCtx::Get()->Now() > deadline
                  ? GRPC_STATUS_DEADLINE_EXCEEDED
                  : GRPC_STATUS_CANCELLED;
     case GRPC_HTTP2_ENHANCE_YOUR_CALM:
diff --git a/src/core/lib/transport/status_conversion.h b/src/core/lib/transport/status_conversion.h
index 3637b82..107eb92 100644
--- a/src/core/lib/transport/status_conversion.h
+++ b/src/core/lib/transport/status_conversion.h
@@ -25,8 +25,7 @@
 
 /* Conversion of grpc status codes to http2 error codes (for RST_STREAM) */
 grpc_http2_error_code grpc_status_to_http2_error(grpc_status_code status);
-grpc_status_code grpc_http2_error_to_grpc_status(grpc_exec_ctx* exec_ctx,
-                                                 grpc_http2_error_code error,
+grpc_status_code grpc_http2_error_to_grpc_status(grpc_http2_error_code error,
                                                  grpc_millis deadline);
 
 /* Conversion of HTTP status codes (:status) to grpc status codes */
diff --git a/src/core/lib/transport/transport.cc b/src/core/lib/transport/transport.cc
index 5bda154..08aee04 100644
--- a/src/core/lib/transport/transport.cc
+++ b/src/core/lib/transport/transport.cc
@@ -49,8 +49,7 @@
 }
 
 #ifndef NDEBUG
-void grpc_stream_unref(grpc_exec_ctx* exec_ctx, grpc_stream_refcount* refcount,
-                       const char* reason) {
+void grpc_stream_unref(grpc_stream_refcount* refcount, const char* reason) {
   if (grpc_trace_stream_refcount.enabled()) {
     gpr_atm val = gpr_atm_no_barrier_load(&refcount->refs.count);
     gpr_log(GPR_DEBUG, "%s %p:%p UNREF %" PRIdPTR "->%" PRIdPTR " %s",
@@ -58,11 +57,11 @@
             val - 1, reason);
   }
 #else
-void grpc_stream_unref(grpc_exec_ctx* exec_ctx,
-                       grpc_stream_refcount* refcount) {
+void grpc_stream_unref(grpc_stream_refcount* refcount) {
 #endif
   if (gpr_unref(&refcount->refs)) {
-    if (exec_ctx->flags & GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP) {
+    if (grpc_core::ExecCtx::Get()->flags() &
+        GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP) {
       /* Ick.
          The thread we're running on MAY be owned (indirectly) by a call-stack.
          If that's the case, destroying the call-stack MAY try to destroy the
@@ -73,7 +72,7 @@
       refcount->destroy.scheduler =
           grpc_executor_scheduler(GRPC_EXECUTOR_SHORT);
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, &refcount->destroy, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&refcount->destroy, GRPC_ERROR_NONE);
   }
 }
 
@@ -89,11 +88,11 @@
 #endif
 }
 
-static void slice_stream_unref(grpc_exec_ctx* exec_ctx, void* p) {
+static void slice_stream_unref(void* p) {
 #ifndef NDEBUG
-  grpc_stream_unref(exec_ctx, STREAM_REF_FROM_SLICE_REF(p), "slice");
+  grpc_stream_unref(STREAM_REF_FROM_SLICE_REF(p), "slice");
 #else
-  grpc_stream_unref(exec_ctx, STREAM_REF_FROM_SLICE_REF(p));
+  grpc_stream_unref(STREAM_REF_FROM_SLICE_REF(p));
 #endif
 }
 
@@ -151,59 +150,50 @@
   return transport->vtable->sizeof_stream;
 }
 
-void grpc_transport_destroy(grpc_exec_ctx* exec_ctx,
-                            grpc_transport* transport) {
-  transport->vtable->destroy(exec_ctx, transport);
+void grpc_transport_destroy(grpc_transport* transport) {
+  transport->vtable->destroy(transport);
 }
 
-int grpc_transport_init_stream(grpc_exec_ctx* exec_ctx,
-                               grpc_transport* transport, grpc_stream* stream,
+int grpc_transport_init_stream(grpc_transport* transport, grpc_stream* stream,
                                grpc_stream_refcount* refcount,
                                const void* server_data, gpr_arena* arena) {
-  return transport->vtable->init_stream(exec_ctx, transport, stream, refcount,
+  return transport->vtable->init_stream(transport, stream, refcount,
                                         server_data, arena);
 }
 
-void grpc_transport_perform_stream_op(grpc_exec_ctx* exec_ctx,
-                                      grpc_transport* transport,
+void grpc_transport_perform_stream_op(grpc_transport* transport,
                                       grpc_stream* stream,
                                       grpc_transport_stream_op_batch* op) {
-  transport->vtable->perform_stream_op(exec_ctx, transport, stream, op);
+  transport->vtable->perform_stream_op(transport, stream, op);
 }
 
-void grpc_transport_perform_op(grpc_exec_ctx* exec_ctx,
-                               grpc_transport* transport,
+void grpc_transport_perform_op(grpc_transport* transport,
                                grpc_transport_op* op) {
-  transport->vtable->perform_op(exec_ctx, transport, op);
+  transport->vtable->perform_op(transport, op);
 }
 
-void grpc_transport_set_pops(grpc_exec_ctx* exec_ctx, grpc_transport* transport,
-                             grpc_stream* stream,
+void grpc_transport_set_pops(grpc_transport* transport, grpc_stream* stream,
                              grpc_polling_entity* pollent) {
   grpc_pollset* pollset;
   grpc_pollset_set* pollset_set;
   if ((pollset = grpc_polling_entity_pollset(pollent)) != nullptr) {
-    transport->vtable->set_pollset(exec_ctx, transport, stream, pollset);
+    transport->vtable->set_pollset(transport, stream, pollset);
   } else if ((pollset_set = grpc_polling_entity_pollset_set(pollent)) !=
              nullptr) {
-    transport->vtable->set_pollset_set(exec_ctx, transport, stream,
-                                       pollset_set);
+    transport->vtable->set_pollset_set(transport, stream, pollset_set);
   } else {
     abort();
   }
 }
 
-void grpc_transport_destroy_stream(grpc_exec_ctx* exec_ctx,
-                                   grpc_transport* transport,
+void grpc_transport_destroy_stream(grpc_transport* transport,
                                    grpc_stream* stream,
                                    grpc_closure* then_schedule_closure) {
-  transport->vtable->destroy_stream(exec_ctx, transport, stream,
-                                    then_schedule_closure);
+  transport->vtable->destroy_stream(transport, stream, then_schedule_closure);
 }
 
-grpc_endpoint* grpc_transport_get_endpoint(grpc_exec_ctx* exec_ctx,
-                                           grpc_transport* transport) {
-  return transport->vtable->get_endpoint(exec_ctx, transport);
+grpc_endpoint* grpc_transport_get_endpoint(grpc_transport* transport) {
+  return transport->vtable->get_endpoint(transport);
 }
 
 // This comment should be sung to the tune of
@@ -214,25 +204,23 @@
 // though it lives in lib, it handles transport stream ops sure
 // it's grpc_transport_stream_op_batch_finish_with_failure
 void grpc_transport_stream_op_batch_finish_with_failure(
-    grpc_exec_ctx* exec_ctx, grpc_transport_stream_op_batch* batch,
-    grpc_error* error, grpc_call_combiner* call_combiner) {
+    grpc_transport_stream_op_batch* batch, grpc_error* error,
+    grpc_call_combiner* call_combiner) {
   if (batch->send_message) {
-    grpc_byte_stream_destroy(exec_ctx,
-                             batch->payload->send_message.send_message);
+    grpc_byte_stream_destroy(batch->payload->send_message.send_message);
   }
   if (batch->recv_message) {
-    GRPC_CALL_COMBINER_START(exec_ctx, call_combiner,
-                             batch->payload->recv_message.recv_message_ready,
-                             GRPC_ERROR_REF(error),
-                             "failing recv_message_ready");
+    GRPC_CALL_COMBINER_START(
+        call_combiner, batch->payload->recv_message.recv_message_ready,
+        GRPC_ERROR_REF(error), "failing recv_message_ready");
   }
   if (batch->recv_initial_metadata) {
     GRPC_CALL_COMBINER_START(
-        exec_ctx, call_combiner,
+        call_combiner,
         batch->payload->recv_initial_metadata.recv_initial_metadata_ready,
         GRPC_ERROR_REF(error), "failing recv_initial_metadata_ready");
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, batch->on_complete, error);
+  GRPC_CLOSURE_SCHED(batch->on_complete, error);
   if (batch->cancel_stream) {
     GRPC_ERROR_UNREF(batch->payload->cancel_stream.cancel_error);
   }
@@ -244,10 +232,9 @@
   grpc_transport_op op;
 } made_transport_op;
 
-static void destroy_made_transport_op(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_error* error) {
+static void destroy_made_transport_op(void* arg, grpc_error* error) {
   made_transport_op* op = (made_transport_op*)arg;
-  GRPC_CLOSURE_SCHED(exec_ctx, op->inner_on_complete, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_SCHED(op->inner_on_complete, GRPC_ERROR_REF(error));
   gpr_free(op);
 }
 
@@ -268,12 +255,11 @@
   grpc_transport_stream_op_batch_payload payload;
 } made_transport_stream_op;
 
-static void destroy_made_transport_stream_op(grpc_exec_ctx* exec_ctx, void* arg,
-                                             grpc_error* error) {
+static void destroy_made_transport_stream_op(void* arg, grpc_error* error) {
   made_transport_stream_op* op = (made_transport_stream_op*)arg;
   grpc_closure* c = op->inner_on_complete;
   gpr_free(op);
-  GRPC_CLOSURE_RUN(exec_ctx, c, GRPC_ERROR_REF(error));
+  GRPC_CLOSURE_RUN(c, GRPC_ERROR_REF(error));
 }
 
 grpc_transport_stream_op_batch* grpc_make_transport_stream_op(
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index af48f13..d813413 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -55,15 +55,14 @@
                           grpc_iomgr_cb_func cb, void* cb_arg,
                           const char* object_type);
 void grpc_stream_ref(grpc_stream_refcount* refcount, const char* reason);
-void grpc_stream_unref(grpc_exec_ctx* exec_ctx, grpc_stream_refcount* refcount,
-                       const char* reason);
+void grpc_stream_unref(grpc_stream_refcount* refcount, const char* reason);
 #define GRPC_STREAM_REF_INIT(rc, ir, cb, cb_arg, objtype) \
   grpc_stream_ref_init(rc, ir, cb, cb_arg, objtype)
 #else
 void grpc_stream_ref_init(grpc_stream_refcount* refcount, int initial_refs,
                           grpc_iomgr_cb_func cb, void* cb_arg);
 void grpc_stream_ref(grpc_stream_refcount* refcount);
-void grpc_stream_unref(grpc_exec_ctx* exec_ctx, grpc_stream_refcount* refcount);
+void grpc_stream_unref(grpc_stream_refcount* refcount);
 #define GRPC_STREAM_REF_INIT(rc, ir, cb, cb_arg, objtype) \
   grpc_stream_ref_init(rc, ir, cb, cb_arg)
 #endif
@@ -237,16 +236,21 @@
       If true, the callback is set to set_accept_stream_fn, with its
       user_data argument set to set_accept_stream_user_data */
   bool set_accept_stream;
-  void (*set_accept_stream_fn)(grpc_exec_ctx* exec_ctx, void* user_data,
-                               grpc_transport* transport,
+  void (*set_accept_stream_fn)(void* user_data, grpc_transport* transport,
                                const void* server_data);
   void* set_accept_stream_user_data;
   /** add this transport to a pollset */
   grpc_pollset* bind_pollset;
   /** add this transport to a pollset_set */
   grpc_pollset_set* bind_pollset_set;
-  /** send a ping, call this back if not NULL */
-  grpc_closure* send_ping;
+  /** send a ping, if either on_initiate or on_ack is not NULL */
+  struct {
+    /** Ping may be delayed by the transport, on_initiate callback will be
+        called when the ping is actually being sent. */
+    grpc_closure* on_initiate;
+    /** Called when the ping ack is received */
+    grpc_closure* on_ack;
+  } send_ping;
 
   /***************************************************************************
    * remaining fields are initialized and used at the discretion of the
@@ -269,13 +273,12 @@
      stream      - a pointer to uninitialized memory to initialize
      server_data - either NULL for a client initiated stream, or a pointer
                    supplied from the accept_stream callback function */
-int grpc_transport_init_stream(grpc_exec_ctx* exec_ctx,
-                               grpc_transport* transport, grpc_stream* stream,
+int grpc_transport_init_stream(grpc_transport* transport, grpc_stream* stream,
                                grpc_stream_refcount* refcount,
                                const void* server_data, gpr_arena* arena);
 
-void grpc_transport_set_pops(grpc_exec_ctx* exec_ctx, grpc_transport* transport,
-                             grpc_stream* stream, grpc_polling_entity* pollent);
+void grpc_transport_set_pops(grpc_transport* transport, grpc_stream* stream,
+                             grpc_polling_entity* pollent);
 
 /* Destroy transport data for a stream.
 
@@ -287,14 +290,13 @@
      transport - the transport on which to create this stream
      stream    - the grpc_stream to destroy (memory is still owned by the
                  caller, but any child memory must be cleaned up) */
-void grpc_transport_destroy_stream(grpc_exec_ctx* exec_ctx,
-                                   grpc_transport* transport,
+void grpc_transport_destroy_stream(grpc_transport* transport,
                                    grpc_stream* stream,
                                    grpc_closure* then_schedule_closure);
 
 void grpc_transport_stream_op_batch_finish_with_failure(
-    grpc_exec_ctx* exec_ctx, grpc_transport_stream_op_batch* op,
-    grpc_error* error, grpc_call_combiner* call_combiner);
+    grpc_transport_stream_op_batch* op, grpc_error* error,
+    grpc_call_combiner* call_combiner);
 
 char* grpc_transport_stream_op_batch_string(grpc_transport_stream_op_batch* op);
 char* grpc_transport_op_string(grpc_transport_op* op);
@@ -309,13 +311,11 @@
                  non-NULL and previously initialized by the same transport.
      op        - a grpc_transport_stream_op_batch specifying the op to perform
    */
-void grpc_transport_perform_stream_op(grpc_exec_ctx* exec_ctx,
-                                      grpc_transport* transport,
+void grpc_transport_perform_stream_op(grpc_transport* transport,
                                       grpc_stream* stream,
                                       grpc_transport_stream_op_batch* op);
 
-void grpc_transport_perform_op(grpc_exec_ctx* exec_ctx,
-                               grpc_transport* transport,
+void grpc_transport_perform_op(grpc_transport* transport,
                                grpc_transport_op* op);
 
 /* Send a ping on a transport
@@ -327,15 +327,11 @@
 void grpc_transport_goaway(grpc_transport* transport, grpc_status_code status,
                            grpc_slice debug_data);
 
-/* Close a transport. Aborts all open streams. */
-void grpc_transport_close(grpc_transport* transport);
-
 /* Destroy the transport */
-void grpc_transport_destroy(grpc_exec_ctx* exec_ctx, grpc_transport* transport);
+void grpc_transport_destroy(grpc_transport* transport);
 
 /* Get the endpoint used by \a transport */
-grpc_endpoint* grpc_transport_get_endpoint(grpc_exec_ctx* exec_ctx,
-                                           grpc_transport* transport);
+grpc_endpoint* grpc_transport_get_endpoint(grpc_transport* transport);
 
 /* Allocate a grpc_transport_op, and preconfigure the on_consumed closure to
    \a on_consumed and then delete the returned transport op */
diff --git a/src/core/lib/transport/transport_impl.h b/src/core/lib/transport/transport_impl.h
index 46be614..50b8a5f 100644
--- a/src/core/lib/transport/transport_impl.h
+++ b/src/core/lib/transport/transport_impl.h
@@ -30,37 +30,34 @@
   const char* name;
 
   /* implementation of grpc_transport_init_stream */
-  int (*init_stream)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                     grpc_stream* stream, grpc_stream_refcount* refcount,
-                     const void* server_data, gpr_arena* arena);
+  int (*init_stream)(grpc_transport* self, grpc_stream* stream,
+                     grpc_stream_refcount* refcount, const void* server_data,
+                     gpr_arena* arena);
 
   /* implementation of grpc_transport_set_pollset */
-  void (*set_pollset)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                      grpc_stream* stream, grpc_pollset* pollset);
+  void (*set_pollset)(grpc_transport* self, grpc_stream* stream,
+                      grpc_pollset* pollset);
 
   /* implementation of grpc_transport_set_pollset */
-  void (*set_pollset_set)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                          grpc_stream* stream, grpc_pollset_set* pollset_set);
+  void (*set_pollset_set)(grpc_transport* self, grpc_stream* stream,
+                          grpc_pollset_set* pollset_set);
 
   /* implementation of grpc_transport_perform_stream_op */
-  void (*perform_stream_op)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                            grpc_stream* stream,
+  void (*perform_stream_op)(grpc_transport* self, grpc_stream* stream,
                             grpc_transport_stream_op_batch* op);
 
   /* implementation of grpc_transport_perform_op */
-  void (*perform_op)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                     grpc_transport_op* op);
+  void (*perform_op)(grpc_transport* self, grpc_transport_op* op);
 
   /* implementation of grpc_transport_destroy_stream */
-  void (*destroy_stream)(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                         grpc_stream* stream,
+  void (*destroy_stream)(grpc_transport* self, grpc_stream* stream,
                          grpc_closure* then_schedule_closure);
 
   /* implementation of grpc_transport_destroy */
-  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_transport* self);
+  void (*destroy)(grpc_transport* self);
 
   /* implementation of grpc_transport_get_endpoint */
-  grpc_endpoint* (*get_endpoint)(grpc_exec_ctx* exec_ctx, grpc_transport* self);
+  grpc_endpoint* (*get_endpoint)(grpc_transport* self);
 } grpc_transport_vtable;
 
 /* an instance of a grpc transport */
diff --git a/src/core/lib/transport/transport_op_string.cc b/src/core/lib/transport/transport_op_string.cc
index e69ab02..c0f82fe 100644
--- a/src/core/lib/transport/transport_op_string.cc
+++ b/src/core/lib/transport/transport_op_string.cc
@@ -187,7 +187,7 @@
     gpr_strvec_add(&b, gpr_strdup("BIND_POLLSET_SET"));
   }
 
-  if (op->send_ping != nullptr) {
+  if (op->send_ping.on_initiate != nullptr || op->send_ping.on_ack != nullptr) {
     if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
     // first = false;
     gpr_strvec_add(&b, gpr_strdup("SEND_PING"));
diff --git a/src/core/tsi/fake_transport_security.cc b/src/core/tsi/fake_transport_security.cc
index f2f365f..b907636 100644
--- a/src/core/tsi/fake_transport_security.cc
+++ b/src/core/tsi/fake_transport_security.cc
@@ -399,8 +399,7 @@
 /* --- tsi_zero_copy_grpc_protector methods implementation. ---*/
 
 static tsi_result fake_zero_copy_grpc_protector_protect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* unprotected_slices,
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* unprotected_slices,
     grpc_slice_buffer* protected_slices) {
   if (self == nullptr || unprotected_slices == nullptr ||
       protected_slices == nullptr) {
@@ -424,8 +423,7 @@
 }
 
 static tsi_result fake_zero_copy_grpc_protector_unprotect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* protected_slices,
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* protected_slices,
     grpc_slice_buffer* unprotected_slices) {
   if (self == nullptr || unprotected_slices == nullptr ||
       protected_slices == nullptr) {
@@ -454,18 +452,18 @@
         impl->parsed_frame_size - TSI_FAKE_FRAME_HEADER_SIZE,
         unprotected_slices);
     impl->parsed_frame_size = 0;
-    grpc_slice_buffer_reset_and_unref_internal(exec_ctx, &impl->header_sb);
+    grpc_slice_buffer_reset_and_unref_internal(&impl->header_sb);
   }
   return TSI_OK;
 }
 
 static void fake_zero_copy_grpc_protector_destroy(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self) {
+    tsi_zero_copy_grpc_protector* self) {
   if (self == nullptr) return;
   tsi_fake_zero_copy_grpc_protector* impl =
       (tsi_fake_zero_copy_grpc_protector*)self;
-  grpc_slice_buffer_destroy_internal(exec_ctx, &impl->header_sb);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &impl->protected_sb);
+  grpc_slice_buffer_destroy_internal(&impl->header_sb);
+  grpc_slice_buffer_destroy_internal(&impl->protected_sb);
   gpr_free(impl);
 }
 
@@ -497,8 +495,7 @@
 }
 
 static tsi_result fake_handshaker_result_create_zero_copy_grpc_protector(
-    void* exec_ctx, const tsi_handshaker_result* self,
-    size_t* max_output_protected_frame_size,
+    const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
     tsi_zero_copy_grpc_protector** protector) {
   *protector =
       tsi_create_fake_zero_copy_grpc_protector(max_output_protected_frame_size);
diff --git a/src/core/tsi/transport_security.h b/src/core/tsi/transport_security.h
index bf3a776..ed662d4 100644
--- a/src/core/tsi/transport_security.h
+++ b/src/core/tsi/transport_security.h
@@ -90,7 +90,7 @@
 typedef struct {
   tsi_result (*extract_peer)(const tsi_handshaker_result* self, tsi_peer* peer);
   tsi_result (*create_zero_copy_grpc_protector)(
-      void* exec_ctx, const tsi_handshaker_result* self,
+      const tsi_handshaker_result* self,
       size_t* max_output_protected_frame_size,
       tsi_zero_copy_grpc_protector** protector);
   tsi_result (*create_frame_protector)(const tsi_handshaker_result* self,
diff --git a/src/core/tsi/transport_security_grpc.cc b/src/core/tsi/transport_security_grpc.cc
index 875d367..76f7ae7 100644
--- a/src/core/tsi/transport_security_grpc.cc
+++ b/src/core/tsi/transport_security_grpc.cc
@@ -20,18 +20,16 @@
 
 /* This method creates a tsi_zero_copy_grpc_protector object.  */
 tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
-    grpc_exec_ctx* exec_ctx, const tsi_handshaker_result* self,
-    size_t* max_output_protected_frame_size,
+    const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
     tsi_zero_copy_grpc_protector** protector) {
-  if (exec_ctx == nullptr || self == nullptr || self->vtable == nullptr ||
-      protector == nullptr) {
+  if (self == nullptr || self->vtable == nullptr || protector == nullptr) {
     return TSI_INVALID_ARGUMENT;
   }
   if (self->vtable->create_zero_copy_grpc_protector == nullptr) {
     return TSI_UNIMPLEMENTED;
   }
   return self->vtable->create_zero_copy_grpc_protector(
-      exec_ctx, self, max_output_protected_frame_size, protector);
+      self, max_output_protected_frame_size, protector);
 }
 
 /* --- tsi_zero_copy_grpc_protector common implementation. ---
@@ -39,33 +37,28 @@
    Calls specific implementation after state/input validation. */
 
 tsi_result tsi_zero_copy_grpc_protector_protect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* unprotected_slices,
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* unprotected_slices,
     grpc_slice_buffer* protected_slices) {
-  if (exec_ctx == nullptr || self == nullptr || self->vtable == nullptr ||
+  if (self == nullptr || self->vtable == nullptr ||
       unprotected_slices == nullptr || protected_slices == nullptr) {
     return TSI_INVALID_ARGUMENT;
   }
   if (self->vtable->protect == nullptr) return TSI_UNIMPLEMENTED;
-  return self->vtable->protect(exec_ctx, self, unprotected_slices,
-                               protected_slices);
+  return self->vtable->protect(self, unprotected_slices, protected_slices);
 }
 
 tsi_result tsi_zero_copy_grpc_protector_unprotect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* protected_slices,
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* protected_slices,
     grpc_slice_buffer* unprotected_slices) {
-  if (exec_ctx == nullptr || self == nullptr || self->vtable == nullptr ||
+  if (self == nullptr || self->vtable == nullptr ||
       protected_slices == nullptr || unprotected_slices == nullptr) {
     return TSI_INVALID_ARGUMENT;
   }
   if (self->vtable->unprotect == nullptr) return TSI_UNIMPLEMENTED;
-  return self->vtable->unprotect(exec_ctx, self, protected_slices,
-                                 unprotected_slices);
+  return self->vtable->unprotect(self, protected_slices, unprotected_slices);
 }
 
-void tsi_zero_copy_grpc_protector_destroy(grpc_exec_ctx* exec_ctx,
-                                          tsi_zero_copy_grpc_protector* self) {
+void tsi_zero_copy_grpc_protector_destroy(tsi_zero_copy_grpc_protector* self) {
   if (self == nullptr) return;
-  self->vtable->destroy(exec_ctx, self);
+  self->vtable->destroy(self);
 }
diff --git a/src/core/tsi/transport_security_grpc.h b/src/core/tsi/transport_security_grpc.h
index 9fccfd7..0156ff1 100644
--- a/src/core/tsi/transport_security_grpc.h
+++ b/src/core/tsi/transport_security_grpc.h
@@ -26,8 +26,7 @@
    assuming there is no fatal error.
    The caller is responsible for destroying the protector.  */
 tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
-    grpc_exec_ctx* exec_ctx, const tsi_handshaker_result* self,
-    size_t* max_output_protected_frame_size,
+    const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
     tsi_zero_copy_grpc_protector** protector);
 
 /* -- tsi_zero_copy_grpc_protector object --  */
@@ -39,8 +38,8 @@
    - This method returns TSI_OK in case of success or a specific error code in
      case of failure.  */
 tsi_result tsi_zero_copy_grpc_protector_protect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* unprotected_slices, grpc_slice_buffer* protected_slices);
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* unprotected_slices,
+    grpc_slice_buffer* protected_slices);
 
 /* Outputs unprotected bytes.
    - protected_slices is the bytes of protected frames.
@@ -49,24 +48,21 @@
      there is not enough data to output in which case unprotected_slices has 0
      bytes.  */
 tsi_result tsi_zero_copy_grpc_protector_unprotect(
-    grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self,
-    grpc_slice_buffer* protected_slices, grpc_slice_buffer* unprotected_slices);
+    tsi_zero_copy_grpc_protector* self, grpc_slice_buffer* protected_slices,
+    grpc_slice_buffer* unprotected_slices);
 
 /* Destroys the tsi_zero_copy_grpc_protector object.  */
-void tsi_zero_copy_grpc_protector_destroy(grpc_exec_ctx* exec_ctx,
-                                          tsi_zero_copy_grpc_protector* self);
+void tsi_zero_copy_grpc_protector_destroy(tsi_zero_copy_grpc_protector* self);
 
 /* Base for tsi_zero_copy_grpc_protector implementations.  */
 typedef struct {
-  tsi_result (*protect)(grpc_exec_ctx* exec_ctx,
-                        tsi_zero_copy_grpc_protector* self,
+  tsi_result (*protect)(tsi_zero_copy_grpc_protector* self,
                         grpc_slice_buffer* unprotected_slices,
                         grpc_slice_buffer* protected_slices);
-  tsi_result (*unprotect)(grpc_exec_ctx* exec_ctx,
-                          tsi_zero_copy_grpc_protector* self,
+  tsi_result (*unprotect)(tsi_zero_copy_grpc_protector* self,
                           grpc_slice_buffer* protected_slices,
                           grpc_slice_buffer* unprotected_slices);
-  void (*destroy)(grpc_exec_ctx* exec_ctx, tsi_zero_copy_grpc_protector* self);
+  void (*destroy)(tsi_zero_copy_grpc_protector* self);
 } tsi_zero_copy_grpc_protector_vtable;
 
 struct tsi_zero_copy_grpc_protector {
diff --git a/src/cpp/common/channel_arguments.cc b/src/cpp/common/channel_arguments.cc
index cae9ef9..b696774 100644
--- a/src/cpp/common/channel_arguments.cc
+++ b/src/cpp/common/channel_arguments.cc
@@ -66,13 +66,12 @@
 }
 
 ChannelArguments::~ChannelArguments() {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   for (auto it = args_.begin(); it != args_.end(); ++it) {
     if (it->type == GRPC_ARG_POINTER) {
-      it->value.pointer.vtable->destroy(&exec_ctx, it->value.pointer.p);
+      it->value.pointer.vtable->destroy(it->value.pointer.p);
     }
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void ChannelArguments::Swap(ChannelArguments& other) {
@@ -95,17 +94,17 @@
   }
   grpc_arg mutator_arg = grpc_socket_mutator_to_arg(mutator);
   bool replaced = false;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   for (auto it = args_.begin(); it != args_.end(); ++it) {
     if (it->type == mutator_arg.type &&
         grpc::string(it->key) == grpc::string(mutator_arg.key)) {
       GPR_ASSERT(!replaced);
-      it->value.pointer.vtable->destroy(&exec_ctx, it->value.pointer.p);
+      it->value.pointer.vtable->destroy(it->value.pointer.p);
       it->value.pointer = mutator_arg.value.pointer;
       replaced = true;
     }
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   if (!replaced) {
     args_.push_back(mutator_arg);
   }
diff --git a/src/cpp/common/channel_filter.cc b/src/cpp/common/channel_filter.cc
index 274079f..cbe2a20 100644
--- a/src/cpp/common/channel_filter.cc
+++ b/src/cpp/common/channel_filter.cc
@@ -27,43 +27,39 @@
 
 // MetadataBatch
 
-grpc_linked_mdelem* MetadataBatch::AddMetadata(grpc_exec_ctx* exec_ctx,
-                                               const string& key,
+grpc_linked_mdelem* MetadataBatch::AddMetadata(const string& key,
                                                const string& value) {
   grpc_linked_mdelem* storage = new grpc_linked_mdelem;
   memset(storage, 0, sizeof(grpc_linked_mdelem));
-  storage->md = grpc_mdelem_from_slices(exec_ctx, SliceFromCopiedString(key),
+  storage->md = grpc_mdelem_from_slices(SliceFromCopiedString(key),
                                         SliceFromCopiedString(value));
   GRPC_LOG_IF_ERROR("MetadataBatch::AddMetadata",
-                    grpc_metadata_batch_link_head(exec_ctx, batch_, storage));
+                    grpc_metadata_batch_link_head(batch_, storage));
   return storage;
 }
 
 // ChannelData
 
-void ChannelData::StartTransportOp(grpc_exec_ctx* exec_ctx,
-                                   grpc_channel_element* elem,
+void ChannelData::StartTransportOp(grpc_channel_element* elem,
                                    TransportOp* op) {
-  grpc_channel_next_op(exec_ctx, elem, op->op());
+  grpc_channel_next_op(elem, op->op());
 }
 
-void ChannelData::GetInfo(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+void ChannelData::GetInfo(grpc_channel_element* elem,
                           const grpc_channel_info* channel_info) {
-  grpc_channel_next_get_info(exec_ctx, elem, channel_info);
+  grpc_channel_next_get_info(elem, channel_info);
 }
 
 // CallData
 
-void CallData::StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
-                                           grpc_call_element* elem,
+void CallData::StartTransportStreamOpBatch(grpc_call_element* elem,
                                            TransportStreamOpBatch* op) {
-  grpc_call_next_op(exec_ctx, elem, op->op());
+  grpc_call_next_op(elem, op->op());
 }
 
-void CallData::SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                      grpc_call_element* elem,
+void CallData::SetPollsetOrPollsetSet(grpc_call_element* elem,
                                       grpc_polling_entity* pollent) {
-  grpc_call_stack_ignore_set_pollset_or_pollset_set(exec_ctx, elem, pollent);
+  grpc_call_stack_ignore_set_pollset_or_pollset_set(elem, pollent);
 }
 
 // internal code used by RegisterChannelFilter()
@@ -75,8 +71,7 @@
 
 namespace {
 
-bool MaybeAddFilter(grpc_exec_ctx* exec_ctx,
-                    grpc_channel_stack_builder* builder, void* arg) {
+bool MaybeAddFilter(grpc_channel_stack_builder* builder, void* arg) {
   const FilterRecord& filter = *(FilterRecord*)arg;
   if (filter.include_filter) {
     const grpc_channel_args* args =
diff --git a/src/cpp/common/channel_filter.h b/src/cpp/common/channel_filter.h
index 9fe9cf0..a1f42c0 100644
--- a/src/cpp/common/channel_filter.h
+++ b/src/cpp/common/channel_filter.h
@@ -54,8 +54,7 @@
   /// Adds metadata and returns the newly allocated storage.
   /// The caller takes ownership of the result, which must exist for the
   /// lifetime of the gRPC call.
-  grpc_linked_mdelem* AddMetadata(grpc_exec_ctx* exec_ctx, const string& key,
-                                  const string& value);
+  grpc_linked_mdelem* AddMetadata(const string& key, const string& value);
 
   class const_iterator : public std::iterator<std::bidirectional_iterator_tag,
                                               const grpc_mdelem> {
@@ -222,18 +221,17 @@
   // TODO(roth): Come up with a more C++-like API for the channel element.
 
   /// Initializes the channel data.
-  virtual grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  virtual grpc_error* Init(grpc_channel_element* elem,
                            grpc_channel_element_args* args) {
     return GRPC_ERROR_NONE;
   }
 
   // Called before destruction.
-  virtual void Destroy(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem) {}
+  virtual void Destroy(grpc_channel_element* elem) {}
 
-  virtual void StartTransportOp(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_element* elem, TransportOp* op);
+  virtual void StartTransportOp(grpc_channel_element* elem, TransportOp* op);
 
-  virtual void GetInfo(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  virtual void GetInfo(grpc_channel_element* elem,
                        const grpc_channel_info* channel_info);
 };
 
@@ -246,24 +244,22 @@
   // TODO(roth): Come up with a more C++-like API for the call element.
 
   /// Initializes the call data.
-  virtual grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+  virtual grpc_error* Init(grpc_call_element* elem,
                            const grpc_call_element_args* args) {
     return GRPC_ERROR_NONE;
   }
 
   // Called before destruction.
-  virtual void Destroy(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+  virtual void Destroy(grpc_call_element* elem,
                        const grpc_call_final_info* final_info,
                        grpc_closure* then_call_closure) {}
 
   /// Starts a new stream operation.
-  virtual void StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
-                                           grpc_call_element* elem,
+  virtual void StartTransportStreamOpBatch(grpc_call_element* elem,
                                            TransportStreamOpBatch* op);
 
   /// Sets a pollset or pollset set.
-  virtual void SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                      grpc_call_element* elem,
+  virtual void SetPollsetOrPollsetSet(grpc_call_element* elem,
                                       grpc_polling_entity* pollent);
 };
 
@@ -277,71 +273,63 @@
  public:
   static const size_t channel_data_size = sizeof(ChannelDataType);
 
-  static grpc_error* InitChannelElement(grpc_exec_ctx* exec_ctx,
-                                        grpc_channel_element* elem,
+  static grpc_error* InitChannelElement(grpc_channel_element* elem,
                                         grpc_channel_element_args* args) {
     // Construct the object in the already-allocated memory.
     ChannelDataType* channel_data = new (elem->channel_data) ChannelDataType();
-    return channel_data->Init(exec_ctx, elem, args);
+    return channel_data->Init(elem, args);
   }
 
-  static void DestroyChannelElement(grpc_exec_ctx* exec_ctx,
-                                    grpc_channel_element* elem) {
+  static void DestroyChannelElement(grpc_channel_element* elem) {
     ChannelDataType* channel_data =
         reinterpret_cast<ChannelDataType*>(elem->channel_data);
-    channel_data->Destroy(exec_ctx, elem);
+    channel_data->Destroy(elem);
     channel_data->~ChannelDataType();
   }
 
-  static void StartTransportOp(grpc_exec_ctx* exec_ctx,
-                               grpc_channel_element* elem,
+  static void StartTransportOp(grpc_channel_element* elem,
                                grpc_transport_op* op) {
     ChannelDataType* channel_data =
         reinterpret_cast<ChannelDataType*>(elem->channel_data);
     TransportOp op_wrapper(op);
-    channel_data->StartTransportOp(exec_ctx, elem, &op_wrapper);
+    channel_data->StartTransportOp(elem, &op_wrapper);
   }
 
-  static void GetChannelInfo(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_element* elem,
+  static void GetChannelInfo(grpc_channel_element* elem,
                              const grpc_channel_info* channel_info) {
     ChannelDataType* channel_data =
         reinterpret_cast<ChannelDataType*>(elem->channel_data);
-    channel_data->GetInfo(exec_ctx, elem, channel_info);
+    channel_data->GetInfo(elem, channel_info);
   }
 
   static const size_t call_data_size = sizeof(CallDataType);
 
-  static grpc_error* InitCallElement(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+  static grpc_error* InitCallElement(grpc_call_element* elem,
                                      const grpc_call_element_args* args) {
     // Construct the object in the already-allocated memory.
     CallDataType* call_data = new (elem->call_data) CallDataType();
-    return call_data->Init(exec_ctx, elem, args);
+    return call_data->Init(elem, args);
   }
 
-  static void DestroyCallElement(grpc_exec_ctx* exec_ctx,
-                                 grpc_call_element* elem,
+  static void DestroyCallElement(grpc_call_element* elem,
                                  const grpc_call_final_info* final_info,
                                  grpc_closure* then_call_closure) {
     CallDataType* call_data = reinterpret_cast<CallDataType*>(elem->call_data);
-    call_data->Destroy(exec_ctx, elem, final_info, then_call_closure);
+    call_data->Destroy(elem, final_info, then_call_closure);
     call_data->~CallDataType();
   }
 
-  static void StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
-                                          grpc_call_element* elem,
+  static void StartTransportStreamOpBatch(grpc_call_element* elem,
                                           grpc_transport_stream_op_batch* op) {
     CallDataType* call_data = reinterpret_cast<CallDataType*>(elem->call_data);
     TransportStreamOpBatch op_wrapper(op);
-    call_data->StartTransportStreamOpBatch(exec_ctx, elem, &op_wrapper);
+    call_data->StartTransportStreamOpBatch(elem, &op_wrapper);
   }
 
-  static void SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+  static void SetPollsetOrPollsetSet(grpc_call_element* elem,
                                      grpc_polling_entity* pollent) {
     CallDataType* call_data = reinterpret_cast<CallDataType*>(elem->call_data);
-    call_data->SetPollsetOrPollsetSet(exec_ctx, elem, pollent);
+    call_data->SetPollsetOrPollsetSet(elem, pollent);
   }
 };
 
diff --git a/src/csharp/generate_proto_csharp.sh b/src/csharp/generate_proto_csharp.sh
index 1a1adbb..299dc3f 100755
--- a/src/csharp/generate_proto_csharp.sh
+++ b/src/csharp/generate_proto_csharp.sh
@@ -33,6 +33,11 @@
 $PROTOC --plugin=$PLUGIN --csharp_out=$REFLECTION_DIR --grpc_out=$REFLECTION_DIR \
     -I src/proto src/proto/grpc/reflection/v1alpha/reflection.proto
 
+# Put grp/core/stats.proto in a subdirectory to avoid collision with grpc/testing/stats.proto
+mkdir -p $TESTING_DIR/CoreStats
+$PROTOC --plugin=$PLUGIN --csharp_out=$TESTING_DIR/CoreStats --grpc_out=$TESTING_DIR/CoreStats \
+    -I src/proto src/proto/grpc/core/stats.proto
+
 # TODO(jtattermusch): following .proto files are a bit broken and import paths
 # don't match the package names. Setting -I to the correct value src/proto
 # breaks the code generation.
diff --git a/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm b/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm
index d5e668a..d130971 100644
--- a/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm
+++ b/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.mm
@@ -110,13 +110,12 @@
 
 static void cronet_init_client_simple_ssl_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *client_args) {
-  grpc_exec_ctx ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   stream_engine *cronetEngine = [Cronet getGlobalEngine];
 
   grpc_channel_args *new_client_args = grpc_channel_args_copy(client_args);
   cronet_init_client_secure_fullstack(f, new_client_args, cronetEngine);
-  grpc_channel_args_destroy(&ctx, new_client_args);
-  grpc_exec_ctx_finish(&ctx);
+  grpc_channel_args_destroy(new_client_args);
 }
 
 static int fail_server_auth_check(grpc_channel_args *server_args) {
diff --git a/src/proto/grpc/lb/v1/load_balancer.proto b/src/proto/grpc/lb/v1/load_balancer.proto
index 0a33568..75c916d 100644
--- a/src/proto/grpc/lb/v1/load_balancer.proto
+++ b/src/proto/grpc/lb/v1/load_balancer.proto
@@ -133,11 +133,8 @@
   // unless instructed otherwise via the client_config.
   repeated Server servers = 1;
 
-  // Indicates the amount of time that the client should consider this server
-  // list as valid. It may be considered stale after waiting this interval of
-  // time after receiving the list. If the interval is not positive, the
-  // client can assume the list is valid until the next list is received.
-  Duration expiration_interval = 3;
+  // Was google.protobuf.Duration expiration_interval.
+  reserved 3;
 }
 
 // Contains server information. When the drop field is not true, use the other
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index 558ce42..5647725 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -348,26 +348,25 @@
 class ChannelCredentials(object):
     """An encapsulation of the data required to create a secure Channel.
 
-  This class has no supported interface - it exists to define the type of its
-  instances and its instances exist to be passed to other functions. For
-  example, ssl_channel_credentials returns an instance, and secure_channel
-  consumes an instance of this class.
-  """
+    This class has no supported interface - it exists to define the type of its
+    instances and its instances exist to be passed to other functions. For
+    example, ssl_channel_credentials returns an instance of this class and
+    secure_channel requires an instance of this class.
+    """
 
     def __init__(self, credentials):
         self._credentials = credentials
 
 
 class CallCredentials(object):
-    """An encapsulation of the data required to assert an identity over a
-       channel.
+    """An encapsulation of the data required to assert an identity over a call.
 
-  A CallCredentials may be composed with ChannelCredentials to always assert
-  identity for every call over that Channel.
+    A CallCredentials may be composed with ChannelCredentials to always assert
+    identity for every call over that Channel.
 
-  This class has no supported interface - it exists to define the type of its
-  instances and its instances exist to be passed to other functions.
-  """
+    This class has no supported interface - it exists to define the type of its
+    instances and its instances exist to be passed to other functions.
+    """
 
     def __init__(self, credentials):
         self._credentials = credentials
@@ -376,23 +375,22 @@
 class AuthMetadataContext(six.with_metaclass(abc.ABCMeta)):
     """Provides information to call credentials metadata plugins.
 
-  Attributes:
-    service_url: A string URL of the service being called into.
-    method_name: A string of the fully qualified method name being called.
-  """
+    Attributes:
+      service_url: A string URL of the service being called into.
+      method_name: A string of the fully qualified method name being called.
+    """
 
 
 class AuthMetadataPluginCallback(six.with_metaclass(abc.ABCMeta)):
     """Callback object received by a metadata plugin."""
 
     def __call__(self, metadata, error):
-        """Inform the gRPC runtime of the metadata to construct a
-           CallCredentials.
+        """Passes to the gRPC runtime authentication metadata for an RPC.
 
-    Args:
-      metadata: The :term:`metadata` used to construct the CallCredentials.
-      error: An Exception to indicate error or None to indicate success.
-    """
+        Args:
+          metadata: The :term:`metadata` used to construct the CallCredentials.
+          error: An Exception to indicate error or None to indicate success.
+        """
         raise NotImplementedError()
 
 
@@ -402,14 +400,14 @@
     def __call__(self, context, callback):
         """Implements authentication by passing metadata to a callback.
 
-    Implementations of this method must not block.
+        Implementations of this method must not block.
 
-    Args:
-      context: An AuthMetadataContext providing information on the RPC that the
-        plugin is being called to authenticate.
-      callback: An AuthMetadataPluginCallback to be invoked either synchronously
-        or asynchronously.
-    """
+        Args:
+          context: An AuthMetadataContext providing information on the RPC that
+            the plugin is being called to authenticate.
+          callback: An AuthMetadataPluginCallback to be invoked either
+            synchronously or asynchronously.
+        """
         raise NotImplementedError()
 
 
@@ -1138,99 +1136,86 @@
                             certificate_chain=None):
     """Creates a ChannelCredentials for use with an SSL-enabled Channel.
 
-  Args:
-    root_certificates: The PEM-encoded root certificates as a byte string,
-    or None to retrieve them from a default location chosen by gRPC runtime.
-    private_key: The PEM-encoded private key as a byte string, or None if no
-    private key should be used.
-    certificate_chain: The PEM-encoded certificate chain as a byte string
-    to use or or None if no certificate chain should be used.
+    Args:
+      root_certificates: The PEM-encoded root certificates as a byte string,
+        or None to retrieve them from a default location chosen by gRPC
+        runtime.
+      private_key: The PEM-encoded private key as a byte string, or None if no
+        private key should be used.
+      certificate_chain: The PEM-encoded certificate chain as a byte string
+        to use or or None if no certificate chain should be used.
 
-  Returns:
-    A ChannelCredentials for use with an SSL-enabled Channel.
-  """
-    if private_key is not None or certificate_chain is not None:
-        pair = _cygrpc.SslPemKeyCertPair(private_key, certificate_chain)
-    else:
-        pair = None
+    Returns:
+      A ChannelCredentials for use with an SSL-enabled Channel.
+    """
     return ChannelCredentials(
-        _cygrpc.channel_credentials_ssl(root_certificates, pair))
+        _cygrpc.SSLChannelCredentials(root_certificates, private_key,
+                                      certificate_chain))
 
 
 def metadata_call_credentials(metadata_plugin, name=None):
     """Construct CallCredentials from an AuthMetadataPlugin.
 
-  Args:
-    metadata_plugin: An AuthMetadataPlugin to use for authentication.
-    name: An optional name for the plugin.
+    Args:
+      metadata_plugin: An AuthMetadataPlugin to use for authentication.
+      name: An optional name for the plugin.
 
-  Returns:
-    A CallCredentials.
-  """
+    Returns:
+      A CallCredentials.
+    """
     from grpc import _plugin_wrapping  # pylint: disable=cyclic-import
-    if name is None:
-        try:
-            effective_name = metadata_plugin.__name__
-        except AttributeError:
-            effective_name = metadata_plugin.__class__.__name__
-    else:
-        effective_name = name
-    return CallCredentials(
-        _plugin_wrapping.call_credentials_metadata_plugin(metadata_plugin,
-                                                          effective_name))
+    return _plugin_wrapping.metadata_plugin_call_credentials(metadata_plugin,
+                                                             name)
 
 
 def access_token_call_credentials(access_token):
     """Construct CallCredentials from an access token.
 
-  Args:
-    access_token: A string to place directly in the http request
-      authorization header, for example
-      "authorization: Bearer <access_token>".
+    Args:
+      access_token: A string to place directly in the http request
+        authorization header, for example
+        "authorization: Bearer <access_token>".
 
-  Returns:
-    A CallCredentials.
-  """
+    Returns:
+      A CallCredentials.
+    """
     from grpc import _auth  # pylint: disable=cyclic-import
-    return metadata_call_credentials(
-        _auth.AccessTokenCallCredentials(access_token))
+    from grpc import _plugin_wrapping  # pylint: disable=cyclic-import
+    return _plugin_wrapping.metadata_plugin_call_credentials(
+        _auth.AccessTokenAuthMetadataPlugin(access_token), None)
 
 
 def composite_call_credentials(*call_credentials):
     """Compose multiple CallCredentials to make a new CallCredentials.
 
-  Args:
-    *call_credentials: At least two CallCredentials objects.
+    Args:
+      *call_credentials: At least two CallCredentials objects.
 
-  Returns:
-    A CallCredentials object composed of the given CallCredentials objects.
-  """
-    from grpc import _credential_composition  # pylint: disable=cyclic-import
-    cygrpc_call_credentials = tuple(
-        single_call_credentials._credentials
-        for single_call_credentials in call_credentials)
+    Returns:
+      A CallCredentials object composed of the given CallCredentials objects.
+    """
     return CallCredentials(
-        _credential_composition.call(cygrpc_call_credentials))
+        _cygrpc.CompositeCallCredentials(
+            tuple(single_call_credentials._credentials
+                  for single_call_credentials in call_credentials)))
 
 
 def composite_channel_credentials(channel_credentials, *call_credentials):
     """Compose a ChannelCredentials and one or more CallCredentials objects.
 
-  Args:
-    channel_credentials: A ChannelCredentials object.
-    *call_credentials: One or more CallCredentials objects.
+    Args:
+      channel_credentials: A ChannelCredentials object.
+      *call_credentials: One or more CallCredentials objects.
 
-  Returns:
-    A ChannelCredentials composed of the given ChannelCredentials and
-    CallCredentials objects.
-  """
-    from grpc import _credential_composition  # pylint: disable=cyclic-import
-    cygrpc_call_credentials = tuple(
-        single_call_credentials._credentials
-        for single_call_credentials in call_credentials)
+    Returns:
+      A ChannelCredentials composed of the given ChannelCredentials and
+        CallCredentials objects.
+    """
     return ChannelCredentials(
-        _credential_composition.channel(channel_credentials._credentials,
-                                        cygrpc_call_credentials))
+        _cygrpc.CompositeChannelCredentials(
+            tuple(single_call_credentials._credentials
+                  for single_call_credentials in call_credentials),
+            channel_credentials._credentials))
 
 
 def ssl_server_credentials(private_key_certificate_chain_pairs,
diff --git a/src/python/grpcio/grpc/_auth.py b/src/python/grpcio/grpc/_auth.py
index c6542d0..9a339b5 100644
--- a/src/python/grpcio/grpc/_auth.py
+++ b/src/python/grpcio/grpc/_auth.py
@@ -63,7 +63,7 @@
         self._pool.shutdown(wait=False)
 
 
-class AccessTokenCallCredentials(grpc.AuthMetadataPlugin):
+class AccessTokenAuthMetadataPlugin(grpc.AuthMetadataPlugin):
     """Metadata wrapper for raw access token credentials."""
 
     def __init__(self, access_token):
diff --git a/src/python/grpcio/grpc/_credential_composition.py b/src/python/grpcio/grpc/_credential_composition.py
deleted file mode 100644
index f652cc3..0000000
--- a/src/python/grpcio/grpc/_credential_composition.py
+++ /dev/null
@@ -1,33 +0,0 @@
-# Copyright 2016 gRPC authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from grpc._cython import cygrpc
-
-
-def _call(call_credentialses):
-    call_credentials_iterator = iter(call_credentialses)
-    composition = next(call_credentials_iterator)
-    for additional_call_credentials in call_credentials_iterator:
-        composition = cygrpc.call_credentials_composite(
-            composition, additional_call_credentials)
-    return composition
-
-
-def call(call_credentialses):
-    return _call(call_credentialses)
-
-
-def channel(channel_credentials, call_credentialses):
-    return cygrpc.channel_credentials_composite(channel_credentials,
-                                                _call(call_credentialses))
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
index 752fb33..6b3a276 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
@@ -72,13 +72,12 @@
         result = grpc_call_cancel(self.c_call, NULL)
       return result
 
-  def set_credentials(
-      self, CallCredentials call_credentials not None):
-    cdef grpc_call_error result
-    with nogil:
-      result = grpc_call_set_credentials(
-          self.c_call, call_credentials.c_credentials)
-    return result
+  def set_credentials(self, CallCredentials call_credentials not None):
+    cdef grpc_call_credentials *c_call_credentials = call_credentials.c()
+    cdef grpc_call_error call_error = grpc_call_set_credentials(
+        self.c_call, c_call_credentials)
+    grpc_call_credentials_release(c_call_credentials)
+    return call_error
 
   def peer(self):
     cdef char *peer = NULL
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
index aeabdba..4c397f8 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
@@ -33,10 +33,10 @@
         self.c_channel = grpc_insecure_channel_create(c_target, c_arguments,
                                                       NULL)
     else:
-      with nogil:
-        self.c_channel = grpc_secure_channel_create(
-            channel_credentials.c_credentials, c_target, c_arguments, NULL)
-      self.references.append(channel_credentials)
+      c_channel_credentials = channel_credentials.c()
+      self.c_channel = grpc_secure_channel_create(
+          c_channel_credentials, c_target, c_arguments, NULL)
+      grpc_channel_credentials_release(c_channel_credentials)
     self.references.append(target)
     self.references.append(arguments)
 
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pxd.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pxd.pxi
index bc0f185..7e9ea33 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pxd.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pxd.pxi
@@ -12,20 +12,66 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cimport cpython
+
+cdef class CallCredentials:
+
+  cdef grpc_call_credentials *c(self)
+
+  # TODO(https://github.com/grpc/grpc/issues/12531): remove.
+  cdef grpc_call_credentials *c_credentials
+
+
+cdef int _get_metadata(
+    void *state, grpc_auth_metadata_context context,
+    grpc_credentials_plugin_metadata_cb cb, void *user_data,
+    grpc_metadata creds_md[GRPC_METADATA_CREDENTIALS_PLUGIN_SYNC_MAX],
+    size_t *num_creds_md, grpc_status_code *status,
+    const char **error_details) with gil
+
+cdef void _destroy(void *state) with gil
+
+
+cdef class MetadataPluginCallCredentials(CallCredentials):
+
+  cdef readonly object _metadata_plugin
+  cdef readonly bytes _name
+
+  cdef grpc_call_credentials *c(self)
+
+
+cdef grpc_call_credentials *_composition(call_credentialses)
+
+
+cdef class CompositeCallCredentials(CallCredentials):
+
+  cdef readonly tuple _call_credentialses
+
+  cdef grpc_call_credentials *c(self)
 
 
 cdef class ChannelCredentials:
 
+  cdef grpc_channel_credentials *c(self)
+
+  # TODO(https://github.com/grpc/grpc/issues/12531): remove.
   cdef grpc_channel_credentials *c_credentials
-  cdef grpc_ssl_pem_key_cert_pair c_ssl_pem_key_cert_pair
-  cdef list references
 
 
-cdef class CallCredentials:
+cdef class SSLChannelCredentials(ChannelCredentials):
 
-  cdef grpc_call_credentials *c_credentials
-  cdef list references
+  cdef readonly object _pem_root_certificates
+  cdef readonly object _private_key
+  cdef readonly object _certificate_chain
+
+  cdef grpc_channel_credentials *c(self)
+
+
+cdef class CompositeChannelCredentials(ChannelCredentials):
+
+  cdef readonly tuple _call_credentialses
+  cdef readonly ChannelCredentials _channel_credentials
+
+  cdef grpc_channel_credentials *c(self)
 
 
 cdef class ServerCertificateConfig:
@@ -49,27 +95,3 @@
   cdef object cert_config_fetcher
   # whether C-core has asked for the initial_cert_config
   cdef bint initial_cert_config_fetched
-
-
-cdef class CredentialsMetadataPlugin:
-
-  cdef object plugin_callback
-  cdef bytes plugin_name
-
-
-cdef grpc_metadata_credentials_plugin _c_plugin(CredentialsMetadataPlugin plugin)
-
-
-cdef class AuthMetadataContext:
-
-  cdef grpc_auth_metadata_context context
-
-
-cdef int plugin_get_metadata(
-    void *state, grpc_auth_metadata_context context,
-    grpc_credentials_plugin_metadata_cb cb, void *user_data,
-    grpc_metadata creds_md[GRPC_METADATA_CREDENTIALS_PLUGIN_SYNC_MAX],
-    size_t *num_creds_md, grpc_status_code *status,
-    const char **error_details) with gil
-
-cdef void plugin_destroy_c_plugin_state(void *state) with gil
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
index ee1328d..246a271 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
@@ -16,47 +16,123 @@
 
 import grpc
 import threading
-import traceback
-
-
-cdef class ChannelCredentials:
-
-  def __cinit__(self):
-    grpc_init()
-    self.c_credentials = NULL
-    self.c_ssl_pem_key_cert_pair.private_key = NULL
-    self.c_ssl_pem_key_cert_pair.certificate_chain = NULL
-    self.references = []
-
-  # The object *can* be invalid in Python if we fail to make the credentials
-  # (and the core thus returns NULL credentials). Used primarily for debugging.
-  @property
-  def is_valid(self):
-    return self.c_credentials != NULL
-
-  def __dealloc__(self):
-    if self.c_credentials != NULL:
-      grpc_channel_credentials_release(self.c_credentials)
-    grpc_shutdown()
 
 
 cdef class CallCredentials:
 
-  def __cinit__(self):
-    grpc_init()
-    self.c_credentials = NULL
-    self.references = []
+  cdef grpc_call_credentials *c(self):
+    raise NotImplementedError()
 
-  # The object *can* be invalid in Python if we fail to make the credentials
-  # (and the core thus returns NULL credentials). Used primarily for debugging.
-  @property
-  def is_valid(self):
-    return self.c_credentials != NULL
 
-  def __dealloc__(self):
-    if self.c_credentials != NULL:
-      grpc_call_credentials_release(self.c_credentials)
-    grpc_shutdown()
+cdef int _get_metadata(
+    void *state, grpc_auth_metadata_context context,
+    grpc_credentials_plugin_metadata_cb cb, void *user_data,
+    grpc_metadata creds_md[GRPC_METADATA_CREDENTIALS_PLUGIN_SYNC_MAX],
+    size_t *num_creds_md, grpc_status_code *status,
+    const char **error_details) with gil:
+  def callback(Metadata metadata, grpc_status_code status, bytes error_details):
+    if status is StatusCode.ok:
+      cb(user_data, metadata.c_metadata, metadata.c_count, status, NULL)
+    else:
+      cb(user_data, NULL, 0, status, error_details)
+  args = context.service_url, context.method_name, callback,
+  threading.Thread(target=<object>state, args=args).start()
+  return 0  # Asynchronous return
+
+
+cdef void _destroy(void *state) with gil:
+  cpython.Py_DECREF(<object>state)
+
+
+cdef class MetadataPluginCallCredentials(CallCredentials):
+
+  def __cinit__(self, metadata_plugin, name):
+    self._metadata_plugin = metadata_plugin
+    self._name = name
+
+  cdef grpc_call_credentials *c(self):
+    cdef grpc_metadata_credentials_plugin c_metadata_plugin
+    c_metadata_plugin.get_metadata = _get_metadata
+    c_metadata_plugin.destroy = _destroy
+    c_metadata_plugin.state = <void *>self._metadata_plugin
+    c_metadata_plugin.type = self._name
+    cpython.Py_INCREF(self._metadata_plugin)
+    return grpc_metadata_credentials_create_from_plugin(c_metadata_plugin, NULL)
+
+
+cdef grpc_call_credentials *_composition(call_credentialses):
+  call_credentials_iterator = iter(call_credentialses)
+  cdef CallCredentials composition = next(call_credentials_iterator)
+  cdef grpc_call_credentials *c_composition = composition.c()
+  cdef CallCredentials additional_call_credentials
+  cdef grpc_call_credentials *c_additional_call_credentials
+  cdef grpc_call_credentials *c_next_composition
+  for additional_call_credentials in call_credentials_iterator:
+    c_additional_call_credentials = additional_call_credentials.c()
+    c_next_composition = grpc_composite_call_credentials_create(
+        c_composition, c_additional_call_credentials, NULL)
+    grpc_call_credentials_release(c_composition)
+    grpc_call_credentials_release(c_additional_call_credentials)
+    c_composition = c_next_composition
+  return c_composition
+
+
+cdef class CompositeCallCredentials(CallCredentials):
+
+  def __cinit__(self, call_credentialses):
+    self._call_credentialses = call_credentialses
+
+  cdef grpc_call_credentials *c(self):
+    return _composition(self._call_credentialses)
+
+
+cdef class ChannelCredentials:
+
+  cdef grpc_channel_credentials *c(self):
+    raise NotImplementedError()
+
+
+cdef class SSLChannelCredentials(ChannelCredentials):
+
+  def __cinit__(self, pem_root_certificates, private_key, certificate_chain):
+    self._pem_root_certificates = pem_root_certificates
+    self._private_key = private_key
+    self._certificate_chain = certificate_chain
+
+  cdef grpc_channel_credentials *c(self):
+    cdef const char *c_pem_root_certificates
+    cdef grpc_ssl_pem_key_cert_pair c_pem_key_certificate_pair
+    if self._pem_root_certificates is None:
+      c_pem_root_certificates = NULL
+    else:
+      c_pem_root_certificates = self._pem_root_certificates
+    if self._private_key is None and self._certificate_chain is None:
+      return grpc_ssl_credentials_create(
+          c_pem_root_certificates, NULL, NULL)
+    else:
+      c_pem_key_certificate_pair.private_key = self._private_key
+      c_pem_key_certificate_pair.certificate_chain = self._certificate_chain
+      return grpc_ssl_credentials_create(
+          c_pem_root_certificates, &c_pem_key_certificate_pair, NULL)
+
+
+cdef class CompositeChannelCredentials(ChannelCredentials):
+
+  def __cinit__(self, call_credentialses, channel_credentials):
+    self._call_credentialses = call_credentialses
+    self._channel_credentials = channel_credentials
+
+  cdef grpc_channel_credentials *c(self):
+    cdef grpc_channel_credentials *c_channel_credentials
+    c_channel_credentials = self._channel_credentials.c()
+    cdef grpc_call_credentials *c_call_credentials_composition = _composition(
+        self._call_credentialses)
+    cdef grpc_channel_credentials *composition
+    c_composition = grpc_composite_channel_credentials_create(
+        c_channel_credentials, c_call_credentials_composition, NULL)
+    grpc_channel_credentials_release(c_channel_credentials)
+    grpc_call_credentials_release(c_call_credentials_composition)
+    return c_composition
 
 
 cdef class ServerCertificateConfig:
@@ -89,190 +165,6 @@
       grpc_server_credentials_release(self.c_credentials)
     grpc_shutdown()
 
-
-cdef class CredentialsMetadataPlugin:
-
-  def __cinit__(self, object plugin_callback, bytes name):
-    """
-    Args:
-      plugin_callback (callable): Callback accepting a service URL (str/bytes)
-        and callback object (accepting a MetadataArray,
-        grpc_status_code, and a str/bytes error message). This argument
-        when called should be non-blocking and eventually call the callback
-        object with the appropriate status code/details and metadata (if
-        successful).
-      name (bytes): Plugin name.
-    """
-    grpc_init()
-    if not callable(plugin_callback):
-      raise ValueError('expected callable plugin_callback')
-    self.plugin_callback = plugin_callback
-    self.plugin_name = name
-
-  def __dealloc__(self):
-    grpc_shutdown()
-
-
-cdef grpc_metadata_credentials_plugin _c_plugin(CredentialsMetadataPlugin plugin):
-  cdef grpc_metadata_credentials_plugin c_plugin
-  c_plugin.get_metadata = plugin_get_metadata
-  c_plugin.destroy = plugin_destroy_c_plugin_state
-  c_plugin.state = <void *>plugin
-  c_plugin.type = plugin.plugin_name
-  cpython.Py_INCREF(plugin)
-  return c_plugin
-
-
-cdef class AuthMetadataContext:
-
-  def __cinit__(self):
-    grpc_init()
-    self.context.service_url = NULL
-    self.context.method_name = NULL
-
-  @property
-  def service_url(self):
-    return self.context.service_url
-
-  @property
-  def method_name(self):
-    return self.context.method_name
-
-  def __dealloc__(self):
-    grpc_shutdown()
-
-
-cdef int plugin_get_metadata(
-    void *state, grpc_auth_metadata_context context,
-    grpc_credentials_plugin_metadata_cb cb, void *user_data,
-    grpc_metadata creds_md[GRPC_METADATA_CREDENTIALS_PLUGIN_SYNC_MAX],
-    size_t *num_creds_md, grpc_status_code *status,
-    const char **error_details) with gil:
-  called_flag = [False]
-  def python_callback(
-      Metadata metadata, grpc_status_code status,
-      bytes error_details):
-    cb(user_data, metadata.c_metadata, metadata.c_count, status, error_details)
-    called_flag[0] = True
-  cdef CredentialsMetadataPlugin self = <CredentialsMetadataPlugin>state
-  cdef AuthMetadataContext cy_context = AuthMetadataContext()
-  cy_context.context = context
-  def async_callback():
-    try:
-      self.plugin_callback(cy_context, python_callback)
-    except Exception as error:
-      if not called_flag[0]:
-        cb(user_data, NULL, 0, StatusCode.unknown,
-           traceback.format_exc().encode())
-  threading.Thread(group=None, target=async_callback).start()
-  return 0  # Asynchronous return
-
-cdef void plugin_destroy_c_plugin_state(void *state) with gil:
-  cpython.Py_DECREF(<CredentialsMetadataPlugin>state)
-
-def channel_credentials_google_default():
-  cdef ChannelCredentials credentials = ChannelCredentials();
-  with nogil:
-    credentials.c_credentials = grpc_google_default_credentials_create()
-  return credentials
-
-def channel_credentials_ssl(pem_root_certificates,
-                            SslPemKeyCertPair ssl_pem_key_cert_pair):
-  pem_root_certificates = str_to_bytes(pem_root_certificates)
-  cdef ChannelCredentials credentials = ChannelCredentials()
-  cdef const char *c_pem_root_certificates = NULL
-  if pem_root_certificates is not None:
-    c_pem_root_certificates = pem_root_certificates
-    credentials.references.append(pem_root_certificates)
-  if ssl_pem_key_cert_pair is not None:
-    with nogil:
-      credentials.c_credentials = grpc_ssl_credentials_create(
-          c_pem_root_certificates, &ssl_pem_key_cert_pair.c_pair, NULL)
-    credentials.references.append(ssl_pem_key_cert_pair)
-  else:
-    with nogil:
-      credentials.c_credentials = grpc_ssl_credentials_create(
-        c_pem_root_certificates, NULL, NULL)
-  return credentials
-
-def channel_credentials_composite(
-    ChannelCredentials credentials_1 not None,
-    CallCredentials credentials_2 not None):
-  if not credentials_1.is_valid or not credentials_2.is_valid:
-    raise ValueError("passed credentials must both be valid")
-  cdef ChannelCredentials credentials = ChannelCredentials()
-  with nogil:
-    credentials.c_credentials = grpc_composite_channel_credentials_create(
-        credentials_1.c_credentials, credentials_2.c_credentials, NULL)
-  credentials.references.append(credentials_1)
-  credentials.references.append(credentials_2)
-  return credentials
-
-def call_credentials_composite(
-    CallCredentials credentials_1 not None,
-    CallCredentials credentials_2 not None):
-  if not credentials_1.is_valid or not credentials_2.is_valid:
-    raise ValueError("passed credentials must both be valid")
-  cdef CallCredentials credentials = CallCredentials()
-  with nogil:
-    credentials.c_credentials = grpc_composite_call_credentials_create(
-        credentials_1.c_credentials, credentials_2.c_credentials, NULL)
-  credentials.references.append(credentials_1)
-  credentials.references.append(credentials_2)
-  return credentials
-
-def call_credentials_google_compute_engine():
-  cdef CallCredentials credentials = CallCredentials()
-  with nogil:
-    credentials.c_credentials = (
-        grpc_google_compute_engine_credentials_create(NULL))
-  return credentials
-
-def call_credentials_service_account_jwt_access(
-    json_key, Timespec token_lifetime not None):
-  json_key = str_to_bytes(json_key)
-  cdef CallCredentials credentials = CallCredentials()
-  cdef char *json_key_c_string = json_key
-  with nogil:
-    credentials.c_credentials = (
-        grpc_service_account_jwt_access_credentials_create(
-            json_key_c_string, token_lifetime.c_time, NULL))
-  credentials.references.append(json_key)
-  return credentials
-
-def call_credentials_google_refresh_token(json_refresh_token):
-  json_refresh_token = str_to_bytes(json_refresh_token)
-  cdef CallCredentials credentials = CallCredentials()
-  cdef char *json_refresh_token_c_string = json_refresh_token
-  with nogil:
-    credentials.c_credentials = grpc_google_refresh_token_credentials_create(
-        json_refresh_token_c_string, NULL)
-  credentials.references.append(json_refresh_token)
-  return credentials
-
-def call_credentials_google_iam(authorization_token, authority_selector):
-  authorization_token = str_to_bytes(authorization_token)
-  authority_selector = str_to_bytes(authority_selector)
-  cdef CallCredentials credentials = CallCredentials()
-  cdef char *authorization_token_c_string = authorization_token
-  cdef char *authority_selector_c_string = authority_selector
-  with nogil:
-    credentials.c_credentials = grpc_google_iam_credentials_create(
-        authorization_token_c_string, authority_selector_c_string, NULL)
-  credentials.references.append(authorization_token)
-  credentials.references.append(authority_selector)
-  return credentials
-
-def call_credentials_metadata_plugin(CredentialsMetadataPlugin plugin):
-  cdef CallCredentials credentials = CallCredentials()
-  cdef grpc_metadata_credentials_plugin c_plugin = _c_plugin(plugin)
-  with nogil:
-    credentials.c_credentials = (
-        grpc_metadata_credentials_create_from_plugin(c_plugin, NULL))
-  # TODO(atash): the following held reference is *probably* never necessary
-  credentials.references.append(plugin)
-  return credentials
-
 cdef const char* _get_c_pem_root_certs(pem_root_certs):
   if pem_root_certs is None:
     return NULL
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 660263f..6a72bbf 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -36,13 +36,6 @@
     pass
 
 
-cdef extern from "grpc/impl/codegen/exec_ctx_fwd.h":
-
-  struct grpc_exec_ctx:
-    # We don't care about the internals
-    pass
-
-
 cdef extern from "grpc/grpc.h":
 
   ctypedef struct grpc_slice:
@@ -169,7 +162,7 @@
 
   ctypedef struct grpc_arg_pointer_vtable:
     void *(*copy)(void *)
-    void (*destroy)(grpc_exec_ctx *, void *)
+    void (*destroy)(void *)
     int (*cmp)(void *, void *)
 
   ctypedef struct grpc_arg_value_pointer:
@@ -524,7 +517,7 @@
 
   grpc_auth_property_iterator grpc_auth_context_property_iterator(
       const grpc_auth_context *ctx)
- 
+
   grpc_auth_property_iterator grpc_auth_context_peer_identity(
       const grpc_auth_context *ctx)
 
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index 4f87261..03fb226 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -320,7 +320,7 @@
   return ptr
 
 
-cdef void destroy_ptr(grpc_exec_ctx* ctx, void* ptr):
+cdef void destroy_ptr(void* ptr):
   pass
 
 
@@ -348,7 +348,7 @@
     elif hasattr(value, '__int__'):
       # Pointer objects must override __int__() to return
       # the underlying C address (Python ints are word size).  The
-      # lifecycle of the pointer is fixed to the lifecycle of the 
+      # lifecycle of the pointer is fixed to the lifecycle of the
       # python object wrapping it.
       self.ptr_vtable.copy = &copy_ptr
       self.ptr_vtable.destroy = &destroy_ptr
diff --git a/src/python/grpcio/grpc/_plugin_wrapping.py b/src/python/grpcio/grpc/_plugin_wrapping.py
index bea2c0f..cd17f4a 100644
--- a/src/python/grpcio/grpc/_plugin_wrapping.py
+++ b/src/python/grpcio/grpc/_plugin_wrapping.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import collections
+import logging
 import threading
 
 import grpc
@@ -20,89 +21,79 @@
 from grpc._cython import cygrpc
 
 
-class AuthMetadataContext(
+class _AuthMetadataContext(
         collections.namedtuple('AuthMetadataContext', (
             'service_url', 'method_name',)), grpc.AuthMetadataContext):
     pass
 
 
-class AuthMetadataPluginCallback(grpc.AuthMetadataContext):
+class _CallbackState(object):
 
-    def __init__(self, callback):
+    def __init__(self):
+        self.lock = threading.Lock()
+        self.called = False
+        self.exception = None
+
+
+class _AuthMetadataPluginCallback(grpc.AuthMetadataPluginCallback):
+
+    def __init__(self, state, callback):
+        self._state = state
         self._callback = callback
 
     def __call__(self, metadata, error):
-        self._callback(metadata, error)
-
-
-class _WrappedCygrpcCallback(object):
-
-    def __init__(self, cygrpc_callback):
-        self.is_called = False
-        self.error = None
-        self.is_called_lock = threading.Lock()
-        self.cygrpc_callback = cygrpc_callback
-
-    def _invoke_failure(self, error):
-        # TODO(atash) translate different Exception superclasses into different
-        # status codes.
-        self.cygrpc_callback(_common.EMPTY_METADATA, cygrpc.StatusCode.internal,
-                             _common.encode(str(error)))
-
-    def _invoke_success(self, metadata):
-        try:
-            cygrpc_metadata = _common.to_cygrpc_metadata(metadata)
-        except Exception as exception:  # pylint: disable=broad-except
-            self._invoke_failure(exception)
-            return
-        self.cygrpc_callback(cygrpc_metadata, cygrpc.StatusCode.ok, b'')
-
-    def __call__(self, metadata, error):
-        with self.is_called_lock:
-            if self.is_called:
-                raise RuntimeError('callback should only ever be invoked once')
-            if self.error:
-                self._invoke_failure(self.error)
-                return
-            self.is_called = True
+        with self._state.lock:
+            if self._state.exception is None:
+                if self._state.called:
+                    raise RuntimeError(
+                        'AuthMetadataPluginCallback invoked more than once!')
+                else:
+                    self._state.called = True
+            else:
+                raise RuntimeError(
+                    'AuthMetadataPluginCallback raised exception "{}"!'.format(
+                        self._state.exception))
         if error is None:
-            self._invoke_success(metadata)
+            self._callback(
+                _common.to_cygrpc_metadata(metadata), cygrpc.StatusCode.ok,
+                None)
         else:
-            self._invoke_failure(error)
-
-    def notify_failure(self, error):
-        with self.is_called_lock:
-            if not self.is_called:
-                self.error = error
+            self._callback(None, cygrpc.StatusCode.internal,
+                           _common.encode(str(error)))
 
 
-class _WrappedPlugin(object):
+class _Plugin(object):
 
-    def __init__(self, plugin):
-        self.plugin = plugin
+    def __init__(self, metadata_plugin):
+        self._metadata_plugin = metadata_plugin
 
-    def __call__(self, context, cygrpc_callback):
-        wrapped_cygrpc_callback = _WrappedCygrpcCallback(cygrpc_callback)
-        wrapped_context = AuthMetadataContext(
-            _common.decode(context.service_url),
-            _common.decode(context.method_name))
+    def __call__(self, service_url, method_name, callback):
+        context = _AuthMetadataContext(
+            _common.decode(service_url), _common.decode(method_name))
+        callback_state = _CallbackState()
         try:
-            self.plugin(wrapped_context,
-                        AuthMetadataPluginCallback(wrapped_cygrpc_callback))
-        except Exception as error:
-            wrapped_cygrpc_callback.notify_failure(error)
-            raise
+            self._metadata_plugin(
+                context, _AuthMetadataPluginCallback(callback_state, callback))
+        except Exception as exception:  # pylint: disable=broad-except
+            logging.exception(
+                'AuthMetadataPluginCallback "%s" raised exception!',
+                self._metadata_plugin)
+            with callback_state.lock:
+                callback_state.exception = exception
+                if callback_state.called:
+                    return
+            callback(None, cygrpc.StatusCode.internal,
+                     _common.encode(str(exception)))
 
 
-def call_credentials_metadata_plugin(plugin, name):
-    """
-  Args:
-    plugin: A callable accepting a grpc.AuthMetadataContext
-      object and a callback (itself accepting a list of metadata key/value
-      2-tuples and a None-able exception value). The callback must be eventually
-      called, but need not be called in plugin's invocation.
-      plugin's invocation must be non-blocking.
-  """
-    return cygrpc.call_credentials_metadata_plugin(
-        cygrpc.CredentialsMetadataPlugin(
-            _WrappedPlugin(plugin), _common.encode(name)))
+def metadata_plugin_call_credentials(metadata_plugin, name):
+    if name is None:
+        try:
+            effective_name = metadata_plugin.__name__
+        except AttributeError:
+            effective_name = metadata_plugin.__class__.__name__
+    else:
+        effective_name = name
+    return grpc.CallCredentials(
+        cygrpc.MetadataPluginCallCredentials(
+            _Plugin(metadata_plugin), _common.encode(effective_name)))
diff --git a/src/python/grpcio/grpc/_server.py b/src/python/grpcio/grpc/_server.py
index cd59b07..5b4812b 100644
--- a/src/python/grpcio/grpc/_server.py
+++ b/src/python/grpcio/grpc/_server.py
@@ -374,10 +374,10 @@
     context = _Context(rpc_event, state, request_deserializer)
     try:
         return behavior(argument, context), True
-    except Exception as e:  # pylint: disable=broad-except
+    except Exception as exception:  # pylint: disable=broad-except
         with state.condition:
-            if e not in state.rpc_errors:
-                details = 'Exception calling application: {}'.format(e)
+            if exception not in state.rpc_errors:
+                details = 'Exception calling application: {}'.format(exception)
                 logging.exception(details)
                 _abort(state, rpc_event.operation_call,
                        cygrpc.StatusCode.unknown, _common.encode(details))
@@ -389,10 +389,10 @@
         return next(response_iterator), True
     except StopIteration:
         return None, True
-    except Exception as e:  # pylint: disable=broad-except
+    except Exception as exception:  # pylint: disable=broad-except
         with state.condition:
-            if e not in state.rpc_errors:
-                details = 'Exception iterating responses: {}'.format(e)
+            if exception not in state.rpc_errors:
+                details = 'Exception iterating responses: {}'.format(exception)
                 logging.exception(details)
                 _abort(state, rpc_event.operation_call,
                        cygrpc.StatusCode.unknown, _common.encode(details))
@@ -591,7 +591,13 @@
     if not rpc_event.success:
         return None, None
     if rpc_event.request_call_details.method is not None:
-        method_handler = _find_method_handler(rpc_event, generic_handlers)
+        try:
+            method_handler = _find_method_handler(rpc_event, generic_handlers)
+        except Exception as exception:  # pylint: disable=broad-except
+            details = 'Exception servicing handler: {}'.format(exception)
+            logging.exception(details)
+            return _reject_rpc(rpc_event, cygrpc.StatusCode.unknown,
+                               b'Error in service handler!'), None
         if method_handler is None:
             return _reject_rpc(rpc_event, cygrpc.StatusCode.unimplemented,
                                b'Method not found!'), None
diff --git a/src/python/grpcio_tests/tests/tests.json b/src/python/grpcio_tests/tests/tests.json
index e277a3e..34cbade 100644
--- a/src/python/grpcio_tests/tests/tests.json
+++ b/src/python/grpcio_tests/tests/tests.json
@@ -22,7 +22,7 @@
   "unit._api_test.ChannelConnectivityTest",
   "unit._api_test.ChannelTest",
   "unit._auth_context_test.AuthContextTest",
-  "unit._auth_test.AccessTokenCallCredentialsTest",
+  "unit._auth_test.AccessTokenAuthMetadataPluginTest",
   "unit._auth_test.GoogleCallCredentialsTest",
   "unit._channel_args_test.ChannelArgsTest",
   "unit._channel_connectivity_test.ChannelConnectivityTest",
diff --git a/src/python/grpcio_tests/tests/unit/_auth_test.py b/src/python/grpcio_tests/tests/unit/_auth_test.py
index f61951b..e2cb938 100644
--- a/src/python/grpcio_tests/tests/unit/_auth_test.py
+++ b/src/python/grpcio_tests/tests/unit/_auth_test.py
@@ -61,7 +61,7 @@
         self.assertTrue(callback_event.wait(1.0))
 
 
-class AccessTokenCallCredentialsTest(unittest.TestCase):
+class AccessTokenAuthMetadataPluginTest(unittest.TestCase):
 
     def test_google_call_credentials_success(self):
         callback_event = threading.Event()
@@ -71,8 +71,8 @@
             self.assertIsNone(error)
             callback_event.set()
 
-        call_creds = _auth.AccessTokenCallCredentials('token')
-        call_creds(None, mock_callback)
+        metadata_plugin = _auth.AccessTokenAuthMetadataPlugin('token')
+        metadata_plugin(None, mock_callback)
         self.assertTrue(callback_event.wait(1.0))
 
 
diff --git a/src/python/grpcio_tests/tests/unit/_cython/cygrpc_test.py b/src/python/grpcio_tests/tests/unit/_cython/cygrpc_test.py
index 18d4a6d..da94cf8 100644
--- a/src/python/grpcio_tests/tests/unit/_cython/cygrpc_test.py
+++ b/src/python/grpcio_tests/tests/unit/_cython/cygrpc_test.py
@@ -28,7 +28,7 @@
 _EMPTY_FLAGS = 0
 
 
-def _metadata_plugin_callback(context, callback):
+def _metadata_plugin(context, callback):
     callback(
         cygrpc.Metadata([
             cygrpc.Metadatum(_CALL_CREDENTIALS_METADATA_KEY,
@@ -105,17 +105,9 @@
         channel = cygrpc.Channel(b'[::]:0', cygrpc.ChannelArgs([]))
         del channel
 
-    def testCredentialsMetadataPluginUpDown(self):
-        plugin = cygrpc.CredentialsMetadataPlugin(
-            lambda ignored_a, ignored_b: None, b'')
-        del plugin
-
-    def testCallCredentialsFromPluginUpDown(self):
-        plugin = cygrpc.CredentialsMetadataPlugin(_metadata_plugin_callback,
-                                                  b'')
-        call_credentials = cygrpc.call_credentials_metadata_plugin(plugin)
-        del plugin
-        del call_credentials
+    def test_metadata_plugin_call_credentials_up_down(self):
+        cygrpc.MetadataPluginCallCredentials(_metadata_plugin,
+                                             b'test plugin name!')
 
     def testServerStartNoExplicitShutdown(self):
         server = cygrpc.Server(cygrpc.ChannelArgs([]))
@@ -205,7 +197,7 @@
 
         return test_utilities.SimpleFuture(performer)
 
-    def testEcho(self):
+    def test_echo(self):
         DEADLINE = time.time() + 5
         DEADLINE_TOLERANCE = 0.25
         CLIENT_METADATA_ASCII_KEY = b'key'
@@ -439,8 +431,8 @@
             cygrpc.SslPemKeyCertPair(resources.private_key(),
                                      resources.certificate_chain())
         ], False)
-        client_credentials = cygrpc.channel_credentials_ssl(
-            resources.test_root_certificates(), None)
+        client_credentials = cygrpc.SSLChannelCredentials(
+            resources.test_root_certificates(), None, None)
         self.setUpMixin(server_credentials, client_credentials,
                         _SSL_HOST_OVERRIDE)
 
diff --git a/src/python/grpcio_tests/tests/unit/_invocation_defects_test.py b/src/python/grpcio_tests/tests/unit/_invocation_defects_test.py
index 0a1e50c..2a1a49c 100644
--- a/src/python/grpcio_tests/tests/unit/_invocation_defects_test.py
+++ b/src/python/grpcio_tests/tests/unit/_invocation_defects_test.py
@@ -32,6 +32,7 @@
 _UNARY_STREAM = '/test/UnaryStream'
 _STREAM_UNARY = '/test/StreamUnary'
 _STREAM_STREAM = '/test/StreamStream'
+_DEFECTIVE_GENERIC_RPC_HANDLER = '/test/DefectiveGenericRpcHandler'
 
 
 class _Callback(object):
@@ -95,6 +96,9 @@
             yield request
         self._control.control()
 
+    def defective_generic_rpc_handler(self):
+        raise test_control.Defect()
+
 
 class _MethodHandler(grpc.RpcMethodHandler):
 
@@ -132,6 +136,8 @@
         elif handler_call_details.method == _STREAM_STREAM:
             return _MethodHandler(True, True, None, None, None, None, None,
                                   self._handler.handle_stream_stream)
+        elif handler_call_details.method == _DEFECTIVE_GENERIC_RPC_HANDLER:
+            return self._handler.defective_generic_rpc_handler()
         else:
             return None
 
@@ -176,6 +182,10 @@
     return channel.stream_stream(_STREAM_STREAM)
 
 
+def _defective_handler_multi_callable(channel):
+    return channel.unary_unary(_DEFECTIVE_GENERIC_RPC_HANDLER)
+
+
 class InvocationDefectsTest(unittest.TestCase):
 
     def setUp(self):
@@ -235,6 +245,18 @@
             for _ in range(test_constants.STREAM_LENGTH // 2 + 1):
                 next(response_iterator)
 
+    def testDefectiveGenericRpcHandlerUnaryResponse(self):
+        request = b'\x07\x08'
+        multi_callable = _defective_handler_multi_callable(self._channel)
+
+        with self.assertRaises(grpc.RpcError) as exception_context:
+            response = multi_callable(
+                request,
+                metadata=(('test', 'DefectiveGenericRpcHandlerUnary'),))
+
+        self.assertIs(grpc.StatusCode.UNKNOWN,
+                      exception_context.exception.code())
+
 
 if __name__ == '__main__':
     unittest.main(verbosity=2)
diff --git a/src/ruby/end2end/multiple_killed_watching_threads_driver.rb b/src/ruby/end2end/multiple_killed_watching_threads_driver.rb
index 59f6f27..8f078cf 100755
--- a/src/ruby/end2end/multiple_killed_watching_threads_driver.rb
+++ b/src/ruby/end2end/multiple_killed_watching_threads_driver.rb
@@ -20,7 +20,7 @@
 
 include GRPC::Core::ConnectivityStates
 
-def watch_state(ch)
+def watch_state(ch, sleep_time)
   thd = Thread.new do
     state = ch.connectivity_state(false)
     fail "non-idle state: #{state}" unless state == IDLE
@@ -28,23 +28,34 @@
   end
   # sleep to get the thread into the middle of a
   # "watch connectivity state" call
-  sleep 0.1
+  sleep sleep_time
   thd.kill
 end
 
-def main
+def run_multiple_killed_watches(num_threads, sleep_time)
   channels = []
-  10.times do
+  num_threads.times do
     ch = GRPC::Core::Channel.new('dummy_host',
                                  nil, :this_channel_is_insecure)
-    watch_state(ch)
+    watch_state(ch, sleep_time)
     channels << ch
   end
 
   # checking state should still be safe to call
   channels.each do |c|
-    fail unless c.connectivity_state(false) == FATAL_FAILURE
+    connectivity_state = c.connectivity_state(false)
+    # The state should be FATAL_FAILURE in the case that it was interrupted
+    # while watching connectivity state, and IDLE if it we never started
+    # watching the channel's connectivity state
+    unless [FATAL_FAILURE, IDLE].include?(connectivity_state)
+      fail "unexpected connectivity state: #{connectivity_state}"
+    end
   end
 end
 
+def main
+  run_multiple_killed_watches(10, 0.1)
+  run_multiple_killed_watches(1000, 0.001)
+end
+
 main
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 62223fd..6377008 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -558,7 +558,7 @@
 typedef void(*grpc_slice_buffer_move_first_no_ref_type)(grpc_slice_buffer* src, size_t n, grpc_slice_buffer* dst);
 extern grpc_slice_buffer_move_first_no_ref_type grpc_slice_buffer_move_first_no_ref_import;
 #define grpc_slice_buffer_move_first_no_ref grpc_slice_buffer_move_first_no_ref_import
-typedef void(*grpc_slice_buffer_move_first_into_buffer_type)(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* src, size_t n, void* dst);
+typedef void(*grpc_slice_buffer_move_first_into_buffer_type)(grpc_slice_buffer* src, size_t n, void* dst);
 extern grpc_slice_buffer_move_first_into_buffer_type grpc_slice_buffer_move_first_into_buffer_import;
 #define grpc_slice_buffer_move_first_into_buffer grpc_slice_buffer_move_first_into_buffer_import
 typedef grpc_slice(*grpc_slice_buffer_take_first_type)(grpc_slice_buffer* src);
@@ -768,7 +768,7 @@
 typedef intptr_t(*gpr_stats_read_type)(const gpr_stats_counter* c);
 extern gpr_stats_read_type gpr_stats_read_import;
 #define gpr_stats_read gpr_stats_read_import
-typedef int(*gpr_thd_new_type)(gpr_thd_id* t, void (*thd_body)(void* arg), void* arg, const gpr_thd_options* options);
+typedef int(*gpr_thd_new_type)(gpr_thd_id* t, const char* thd_name, void (*thd_body)(void* arg), void* arg, const gpr_thd_options* options);
 extern gpr_thd_new_type gpr_thd_new_import;
 #define gpr_thd_new gpr_thd_new_import
 typedef gpr_thd_options(*gpr_thd_options_default_type)(void);
diff --git a/templates/gRPC-Core.podspec.template b/templates/gRPC-Core.podspec.template
index 04b8940..cb4d556 100644
--- a/templates/gRPC-Core.podspec.template
+++ b/templates/gRPC-Core.podspec.template
@@ -61,6 +61,10 @@
       :tag => "v#{version}",
     }
 
+    # gRPC podspecs depend on fix for https://github.com/CocoaPods/CocoaPods/issues/6024,
+    # which was released in Cocoapods v1.2.0.
+    s.cocoapods_version = '>= 1.2.0'
+
     s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'
     s.requires_arc = false
diff --git a/test/core/backoff/backoff_test.cc b/test/core/backoff/backoff_test.cc
index ef2de8d..d3115fe 100644
--- a/test/core/backoff/backoff_test.cc
+++ b/test/core/backoff/backoff_test.cc
@@ -18,6 +18,7 @@
 
 #include "src/core/lib/backoff/backoff.h"
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
@@ -32,23 +33,24 @@
   const grpc_millis max_backoff = 1000;
   grpc_backoff_init(&backoff, initial_backoff, multiplier, jitter,
                     min_connect_timeout, max_backoff);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_backoff_result next_deadlines = grpc_backoff_begin(&exec_ctx, &backoff);
-  GPR_ASSERT(next_deadlines.current_deadline - grpc_exec_ctx_now(&exec_ctx) ==
+  grpc_core::ExecCtx exec_ctx;
+  grpc_backoff_result next_deadlines = grpc_backoff_begin(&backoff);
+  GPR_ASSERT(next_deadlines.current_deadline -
+                 grpc_core::ExecCtx::Get()->Now() ==
              initial_backoff);
   GPR_ASSERT(next_deadlines.next_attempt_start_time -
-                 grpc_exec_ctx_now(&exec_ctx) ==
+                 grpc_core::ExecCtx::Get()->Now() ==
              initial_backoff);
   for (int i = 0; i < 10000; i++) {
-    next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
-    GPR_ASSERT(next_deadlines.current_deadline - grpc_exec_ctx_now(&exec_ctx) ==
+    next_deadlines = grpc_backoff_step(&backoff);
+    GPR_ASSERT(next_deadlines.current_deadline -
+                   grpc_core::ExecCtx::Get()->Now() ==
                initial_backoff);
     GPR_ASSERT(next_deadlines.next_attempt_start_time -
-                   grpc_exec_ctx_now(&exec_ctx) ==
+                   grpc_core::ExecCtx::Get()->Now() ==
                initial_backoff);
-    exec_ctx.now = next_deadlines.current_deadline;
+    grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_min_connect(void) {
@@ -60,17 +62,16 @@
   const grpc_millis max_backoff = 1000;
   grpc_backoff_init(&backoff, initial_backoff, multiplier, jitter,
                     min_connect_timeout, max_backoff);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_backoff_result next = grpc_backoff_begin(&exec_ctx, &backoff);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_backoff_result next = grpc_backoff_begin(&backoff);
   // Because the min_connect_timeout > initial_backoff, current_deadline is used
   // as the deadline for the current attempt.
-  GPR_ASSERT(next.current_deadline - grpc_exec_ctx_now(&exec_ctx) ==
+  GPR_ASSERT(next.current_deadline - grpc_core::ExecCtx::Get()->Now() ==
              min_connect_timeout);
   // ... while, if the current attempt fails, the next one will happen after
   // initial_backoff.
-  GPR_ASSERT(next.next_attempt_start_time - grpc_exec_ctx_now(&exec_ctx) ==
+  GPR_ASSERT(next.next_attempt_start_time - grpc_core::ExecCtx::Get()->Now() ==
              initial_backoff);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_no_jitter_backoff(void) {
@@ -84,49 +85,47 @@
                     min_connect_timeout, max_backoff);
   // x_1 = 2
   // x_n = 2**i + x_{i-1} ( = 2**(n+1) - 2 )
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  exec_ctx.now = 0;
-  exec_ctx.now_is_valid = true;
-  grpc_backoff_result next_deadlines = grpc_backoff_begin(&exec_ctx, &backoff);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(0);
+  grpc_backoff_result next_deadlines = grpc_backoff_begin(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline ==
              next_deadlines.next_attempt_start_time);
   GPR_ASSERT(next_deadlines.current_deadline == 2);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 6);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 14);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 30);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 62);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 126);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 254);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 510);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 1022);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   // Hit the maximum timeout. From this point onwards, retries will increase
   // only by max timeout.
   GPR_ASSERT(next_deadlines.current_deadline == 1535);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 2048);
-  exec_ctx.now = next_deadlines.current_deadline;
-  next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
+  next_deadlines = grpc_backoff_step(&backoff);
   GPR_ASSERT(next_deadlines.current_deadline == 2561);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_jitter_backoff(void) {
@@ -142,12 +141,13 @@
 
   backoff.rng_state = 0;  // force consistent PRNG
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_backoff_result next_deadlines = grpc_backoff_begin(&exec_ctx, &backoff);
-  GPR_ASSERT(next_deadlines.current_deadline - grpc_exec_ctx_now(&exec_ctx) ==
+  grpc_core::ExecCtx exec_ctx;
+  grpc_backoff_result next_deadlines = grpc_backoff_begin(&backoff);
+  GPR_ASSERT(next_deadlines.current_deadline -
+                 grpc_core::ExecCtx::Get()->Now() ==
              initial_backoff);
   GPR_ASSERT(next_deadlines.next_attempt_start_time -
-                 grpc_exec_ctx_now(&exec_ctx) ==
+                 grpc_core::ExecCtx::Get()->Now() ==
              initial_backoff);
 
   grpc_millis expected_next_lower_bound =
@@ -156,11 +156,11 @@
       (grpc_millis)((double)current_backoff * (1 + jitter));
 
   for (int i = 0; i < 10000; i++) {
-    next_deadlines = grpc_backoff_step(&exec_ctx, &backoff);
+    next_deadlines = grpc_backoff_step(&backoff);
     // next-now must be within (jitter*100)% of the current backoff (which
     // increases by * multiplier up to max_backoff).
     const grpc_millis timeout_millis =
-        next_deadlines.current_deadline - grpc_exec_ctx_now(&exec_ctx);
+        next_deadlines.current_deadline - grpc_core::ExecCtx::Get()->Now();
     GPR_ASSERT(timeout_millis >= expected_next_lower_bound);
     GPR_ASSERT(timeout_millis <= expected_next_upper_bound);
     current_backoff = GPR_MIN(
@@ -169,13 +169,13 @@
         (grpc_millis)((double)current_backoff * (1 - jitter));
     expected_next_upper_bound =
         (grpc_millis)((double)current_backoff * (1 + jitter));
-    exec_ctx.now = next_deadlines.current_deadline;
+    grpc_core::ExecCtx::Get()->TestOnlySetNow(next_deadlines.current_deadline);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   gpr_time_init();
 
   test_constant_backoff();
@@ -183,5 +183,6 @@
   test_no_jitter_backoff();
   test_jitter_backoff();
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/bad_client.cc b/test/core/bad_client/bad_client.cc
index c19b7bd..4c1642a 100644
--- a/test/core/bad_client/bad_client.cc
+++ b/test/core/bad_client/bad_client.cc
@@ -50,20 +50,19 @@
   gpr_event_set(&a->done_thd, (void*)1);
 }
 
-static void done_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void done_write(void* arg, grpc_error* error) {
   thd_args* a = (thd_args*)arg;
   gpr_event_set(&a->done_write, (void*)1);
 }
 
 static void server_setup_transport(void* ts, grpc_transport* transport) {
   thd_args* a = (thd_args*)ts;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_server_setup_transport(&exec_ctx, a->server, transport, nullptr,
+  grpc_core::ExecCtx exec_ctx;
+  grpc_server_setup_transport(a->server, transport, nullptr,
                               grpc_server_get_channel_args(a->server));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void read_done(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void read_done(void* arg, grpc_error* error) {
   gpr_event* read_done = (gpr_event*)arg;
   gpr_event_set(read_done, (void*)1);
 }
@@ -81,7 +80,7 @@
       grpc_slice_from_copied_buffer(client_payload, client_payload_length);
   grpc_slice_buffer outgoing;
   grpc_closure done_write_closure;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_completion_queue* shutdown_cq;
 
   if (client_payload_length < 4 * 1024) {
@@ -115,20 +114,19 @@
                                   GRPC_BAD_CLIENT_REGISTERED_HOST,
                                   GRPC_SRM_PAYLOAD_READ_INITIAL_BYTE_BUFFER, 0);
   grpc_server_start(a.server);
-  transport = grpc_create_chttp2_transport(&exec_ctx, nullptr, sfd.server, 0);
+  transport = grpc_create_chttp2_transport(nullptr, sfd.server, false);
   server_setup_transport(&a, transport);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
   /* Bind everything into the same pollset */
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd.client, grpc_cq_pollset(a.cq));
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd.server, grpc_cq_pollset(a.cq));
+  grpc_endpoint_add_to_pollset(sfd.client, grpc_cq_pollset(a.cq));
+  grpc_endpoint_add_to_pollset(sfd.server, grpc_cq_pollset(a.cq));
 
   /* Check a ground truth */
   GPR_ASSERT(grpc_server_has_open_connections(a.server));
 
   /* Start validator */
-  gpr_thd_new(&id, thd_func, &a, nullptr);
+  gpr_thd_new(&id, "grpc_bad_client", thd_func, &a, nullptr);
 
   grpc_slice_buffer_init(&outgoing);
   grpc_slice_buffer_add(&outgoing, slice);
@@ -136,8 +134,8 @@
                     grpc_schedule_on_exec_ctx);
 
   /* Write data */
-  grpc_endpoint_write(&exec_ctx, sfd.client, &outgoing, &done_write_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_write(sfd.client, &outgoing, &done_write_closure);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Await completion, unless the request is large and write may not finish
    * before the peer shuts down. */
@@ -148,10 +146,9 @@
 
   if (flags & GRPC_BAD_CLIENT_DISCONNECT) {
     grpc_endpoint_shutdown(
-        &exec_ctx, sfd.client,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Disconnect"));
-    grpc_endpoint_destroy(&exec_ctx, sfd.client);
-    grpc_exec_ctx_finish(&exec_ctx);
+        sfd.client, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Disconnect"));
+    grpc_endpoint_destroy(sfd.client);
+    grpc_core::ExecCtx::Get()->Flush();
     sfd.client = nullptr;
   }
 
@@ -170,9 +167,8 @@
         grpc_closure read_done_closure;
         GRPC_CLOSURE_INIT(&read_done_closure, read_done, &read_done_event,
                           grpc_schedule_on_exec_ctx);
-        grpc_endpoint_read(&exec_ctx, sfd.client, &incoming,
-                           &read_done_closure);
-        grpc_exec_ctx_finish(&exec_ctx);
+        grpc_endpoint_read(sfd.client, &incoming, &read_done_closure);
+        grpc_core::ExecCtx::Get()->Flush();
         do {
           GPR_ASSERT(gpr_time_cmp(deadline, gpr_now(deadline.clock_type)) > 0);
           GPR_ASSERT(
@@ -185,14 +181,13 @@
                 "client validator failed; trying additional read "
                 "in case we didn't get all the data");
       }
-      grpc_slice_buffer_destroy_internal(&exec_ctx, &incoming);
+      grpc_slice_buffer_destroy_internal(&incoming);
     }
     // Shutdown.
     grpc_endpoint_shutdown(
-        &exec_ctx, sfd.client,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
-    grpc_endpoint_destroy(&exec_ctx, sfd.client);
-    grpc_exec_ctx_finish(&exec_ctx);
+        sfd.client, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
+    grpc_endpoint_destroy(sfd.client);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   GPR_ASSERT(
@@ -206,8 +201,7 @@
   grpc_completion_queue_destroy(shutdown_cq);
   grpc_server_destroy(a.server);
   grpc_completion_queue_destroy(a.cq);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &outgoing);
+  grpc_slice_buffer_destroy_internal(&outgoing);
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
diff --git a/test/core/bad_client/tests/badreq.cc b/test/core/bad_client/tests/badreq.cc
index c30244e..eeaf4c9 100644
--- a/test/core/bad_client/tests/badreq.cc
+++ b/test/core/bad_client/tests/badreq.cc
@@ -20,6 +20,8 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
+
 #include "src/core/lib/surface/server.h"
 #include "test/core/end2end/cq_verifier.h"
 
@@ -38,6 +40,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* invalid content type */
   GRPC_RUN_BAD_CLIENT_TEST(
@@ -126,5 +129,6 @@
       "\x10\x0auser-agent\"bad-client grpc-c/0.12.0.0 (linux)",
       GRPC_BAD_CLIENT_DISCONNECT);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/connection_prefix.cc b/test/core/bad_client/tests/connection_prefix.cc
index 47252f9..4aab234 100644
--- a/test/core/bad_client/tests/connection_prefix.cc
+++ b/test/core/bad_client/tests/connection_prefix.cc
@@ -30,6 +30,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, "X", 0);
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, "PX", 0);
@@ -57,5 +58,7 @@
                            0);
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, "PRI * HTTP/2.0\r\n\r\nSM\r\n\rX",
                            0);
+
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/head_of_line_blocking.cc b/test/core/bad_client/tests/head_of_line_blocking.cc
index bbc5611..f56c4d7 100644
--- a/test/core/bad_client/tests/head_of_line_blocking.cc
+++ b/test/core/bad_client/tests/head_of_line_blocking.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/surface/server.h"
@@ -109,6 +110,7 @@
 int main(int argc, char** argv) {
   int i;
   grpc_test_init(argc, argv);
+  grpc_init();
 
 #define NUM_FRAMES 10
 #define FRAME_SIZE 1000
@@ -131,6 +133,7 @@
   }
   grpc_run_bad_client_test(verifier, nullptr, g_buffer, g_count, 0);
   gpr_free(g_buffer);
+  grpc_shutdown();
 
   return 0;
 }
diff --git a/test/core/bad_client/tests/headers.cc b/test/core/bad_client/tests/headers.cc
index 50bb72c..2aa1b28 100644
--- a/test/core/bad_client/tests/headers.cc
+++ b/test/core/bad_client/tests/headers.cc
@@ -34,6 +34,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* partial http2 header prefixes */
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, PFX_STR "\x00",
@@ -335,5 +336,6 @@
                            "15 seconds",
                            GRPC_BAD_CLIENT_DISCONNECT);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/initial_settings_frame.cc b/test/core/bad_client/tests/initial_settings_frame.cc
index edc52f5..0220000 100644
--- a/test/core/bad_client/tests/initial_settings_frame.cc
+++ b/test/core/bad_client/tests/initial_settings_frame.cc
@@ -33,6 +33,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* various partial prefixes */
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, PFX_STR "\x00",
@@ -106,5 +107,6 @@
                            PFX_STR ONE_SETTING_HDR "\x00\x99\x00\x00\x00\x00",
                            GRPC_BAD_CLIENT_DISCONNECT);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/server_registered_method.cc b/test/core/bad_client/tests/server_registered_method.cc
index 6613c94..c2dc9c6 100644
--- a/test/core/bad_client/tests/server_registered_method.cc
+++ b/test/core/bad_client/tests/server_registered_method.cc
@@ -77,6 +77,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* body generated with
    * tools/codegen/core/gen_server_registered_method_bad_client_test_body.py */
@@ -123,5 +124,6 @@
       "\x00\x00\x07\x00\x01\x00\x00\x00\x01\x00\x00\x00\x00\x02\x00\x00",
       0);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/simple_request.cc b/test/core/bad_client/tests/simple_request.cc
index 9f4a03e..c80fc5c 100644
--- a/test/core/bad_client/tests/simple_request.cc
+++ b/test/core/bad_client/tests/simple_request.cc
@@ -20,6 +20,8 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
+
 #include "src/core/lib/surface/server.h"
 #include "test/core/end2end/cq_verifier.h"
 
@@ -122,6 +124,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* basic request: check that things are working */
   GRPC_RUN_BAD_CLIENT_TEST(verifier, nullptr, PFX_STR, 0);
@@ -164,5 +167,6 @@
   GRPC_RUN_BAD_CLIENT_TEST(failure_verifier, nullptr,
                            PFX_STR "\x00\x00\x00\x03\x10\x00\x00\x00\x01", 0);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/unknown_frame.cc b/test/core/bad_client/tests/unknown_frame.cc
index d962a42..b1b618a 100644
--- a/test/core/bad_client/tests/unknown_frame.cc
+++ b/test/core/bad_client/tests/unknown_frame.cc
@@ -33,6 +33,7 @@
 }
 
 int main(int argc, char** argv) {
+  grpc_init();
   grpc_test_init(argc, argv);
 
   /* test adding prioritization data */
@@ -40,5 +41,6 @@
                            PFX_STR "\x00\x00\x00\x88\x00\x00\x00\x00\x01",
                            GRPC_BAD_CLIENT_DISCONNECT);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/bad_client/tests/window_overflow.cc b/test/core/bad_client/tests/window_overflow.cc
index f4bd818..ed8279c 100644
--- a/test/core/bad_client/tests/window_overflow.cc
+++ b/test/core/bad_client/tests/window_overflow.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/surface/server.h"
@@ -72,6 +73,7 @@
 #define SEND_SIZE (6 * 1024 * 1024)
 #define NUM_FRAMES (SEND_SIZE / FRAME_SIZE + 1)
   grpc_test_init(argc, argv);
+  grpc_init();
 
   addbuf(PFX_STR, sizeof(PFX_STR) - 1);
   for (i = 0; i < NUM_FRAMES; i++) {
@@ -93,6 +95,7 @@
   grpc_run_bad_client_test(verifier, nullptr, g_buffer, g_count,
                            GRPC_BAD_CLIENT_LARGE_REQUEST);
   gpr_free(g_buffer);
+  grpc_shutdown();
 
   return 0;
 }
diff --git a/test/core/channel/channel_args_test.cc b/test/core/channel/channel_args_test.cc
index e8b3334..4a8195e 100644
--- a/test/core/channel/channel_args_test.cc
+++ b/test/core/channel/channel_args_test.cc
@@ -26,7 +26,7 @@
 #include "test/core/util/test_config.h"
 
 static void test_create(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   grpc_arg arg_int;
   grpc_arg arg_string;
@@ -55,12 +55,11 @@
   GPR_ASSERT(strcmp(ch_args->args[1].value.string, arg_string.value.string) ==
              0);
 
-  grpc_channel_args_destroy(&exec_ctx, ch_args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(ch_args);
 }
 
 static void test_set_compression_algorithm(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_args* ch_args;
 
   ch_args =
@@ -70,12 +69,11 @@
                     GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM) == 0);
   GPR_ASSERT(ch_args->args[0].type == GRPC_ARG_INTEGER);
 
-  grpc_channel_args_destroy(&exec_ctx, ch_args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(ch_args);
 }
 
 static void test_compression_algorithm_states(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_args *ch_args, *ch_args_wo_gzip, *ch_args_wo_gzip_deflate;
   unsigned states_bitset;
   size_t i;
@@ -91,10 +89,10 @@
 
   /* disable gzip and deflate */
   ch_args_wo_gzip = grpc_channel_args_compression_algorithm_set_state(
-      &exec_ctx, &ch_args, GRPC_COMPRESS_GZIP, 0);
+      &ch_args, GRPC_COMPRESS_GZIP, 0);
   GPR_ASSERT(ch_args == ch_args_wo_gzip);
   ch_args_wo_gzip_deflate = grpc_channel_args_compression_algorithm_set_state(
-      &exec_ctx, &ch_args_wo_gzip, GRPC_COMPRESS_DEFLATE, 0);
+      &ch_args_wo_gzip, GRPC_COMPRESS_DEFLATE, 0);
   GPR_ASSERT(ch_args_wo_gzip == ch_args_wo_gzip_deflate);
 
   states_bitset = (unsigned)grpc_channel_args_compression_algorithm_get_states(
@@ -109,7 +107,7 @@
 
   /* re-enabled gzip only */
   ch_args_wo_gzip = grpc_channel_args_compression_algorithm_set_state(
-      &exec_ctx, &ch_args_wo_gzip_deflate, GRPC_COMPRESS_GZIP, 1);
+      &ch_args_wo_gzip_deflate, GRPC_COMPRESS_GZIP, 1);
   GPR_ASSERT(ch_args_wo_gzip == ch_args_wo_gzip_deflate);
 
   states_bitset = (unsigned)grpc_channel_args_compression_algorithm_get_states(
@@ -122,8 +120,7 @@
     }
   }
 
-  grpc_channel_args_destroy(&exec_ctx, ch_args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(ch_args);
 }
 
 static void test_set_socket_mutator(void) {
@@ -137,9 +134,8 @@
   GPR_ASSERT(ch_args->args[0].type == GRPC_ARG_POINTER);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, ch_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(ch_args);
   }
 }
 
diff --git a/test/core/channel/channel_stack_builder_test.cc b/test/core/channel/channel_stack_builder_test.cc
index a67f0ef..ef6db81 100644
--- a/test/core/channel/channel_stack_builder_test.cc
+++ b/test/core/channel/channel_stack_builder_test.cc
@@ -29,34 +29,30 @@
 #include "src/core/lib/surface/channel_init.h"
 #include "test/core/util/test_config.h"
 
-static grpc_error* channel_init_func(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* channel_init_func(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* call_init_func(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* call_init_func(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void channel_destroy_func(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void channel_destroy_func(grpc_channel_element* elem) {}
 
-static void call_destroy_func(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void call_destroy_func(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
-static void call_func(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void call_func(grpc_call_element* elem,
                       grpc_transport_stream_op_batch* op) {}
 
-static void channel_func(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-                         grpc_transport_op* op) {
+static void channel_func(grpc_channel_element* elem, grpc_transport_op* op) {
   if (op->disconnect_with_error != GRPC_ERROR_NONE) {
     GRPC_ERROR_UNREF(op->disconnect_with_error);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
 }
 
 bool g_replacement_fn_called = false;
@@ -106,8 +102,7 @@
     grpc_channel_next_get_info,
     "filter_name"};
 
-static bool add_replacement_filter(grpc_exec_ctx* exec_ctx,
-                                   grpc_channel_stack_builder* builder,
+static bool add_replacement_filter(grpc_channel_stack_builder* builder,
                                    void* arg) {
   const grpc_channel_filter* filter =
       static_cast<const grpc_channel_filter*>(arg);
@@ -118,8 +113,7 @@
       builder, filter, set_arg_once_fn, &g_replacement_fn_called);
 }
 
-static bool add_original_filter(grpc_exec_ctx* exec_ctx,
-                                grpc_channel_stack_builder* builder,
+static bool add_original_filter(grpc_channel_stack_builder* builder,
                                 void* arg) {
   return grpc_channel_stack_builder_prepend_filter(
       builder, (const grpc_channel_filter*)arg, set_arg_once_fn,
diff --git a/test/core/channel/channel_stack_test.cc b/test/core/channel/channel_stack_test.cc
index 988ea9b..ef43fac 100644
--- a/test/core/channel/channel_stack_test.cc
+++ b/test/core/channel/channel_stack_test.cc
@@ -27,8 +27,7 @@
 #include "src/core/lib/slice/slice_internal.h"
 #include "test/core/util/test_config.h"
 
-static grpc_error* channel_init_func(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* channel_init_func(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(args->channel_args->num_args == 1);
   GPR_ASSERT(args->channel_args->args[0].type == GRPC_ARG_INTEGER);
@@ -40,42 +39,37 @@
   return GRPC_ERROR_NONE;
 }
 
-static grpc_error* call_init_func(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* call_init_func(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   ++*(int*)(elem->channel_data);
   *(int*)(elem->call_data) = 0;
   return GRPC_ERROR_NONE;
 }
 
-static void channel_destroy_func(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void channel_destroy_func(grpc_channel_element* elem) {}
 
-static void call_destroy_func(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void call_destroy_func(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
   ++*(int*)(elem->channel_data);
 }
 
-static void call_func(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void call_func(grpc_call_element* elem,
                       grpc_transport_stream_op_batch* op) {
   ++*(int*)(elem->call_data);
 }
 
-static void channel_func(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
-                         grpc_transport_op* op) {
+static void channel_func(grpc_channel_element* elem, grpc_transport_op* op) {
   ++*(int*)(elem->channel_data);
 }
 
-static void free_channel(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
-  grpc_channel_stack_destroy(exec_ctx, static_cast<grpc_channel_stack*>(arg));
+static void free_channel(void* arg, grpc_error* error) {
+  grpc_channel_stack_destroy(static_cast<grpc_channel_stack*>(arg));
   gpr_free(arg);
 }
 
-static void free_call(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-  grpc_call_stack_destroy(exec_ctx, static_cast<grpc_call_stack*>(arg), nullptr,
-                          nullptr);
+static void free_call(void* arg, grpc_error* error) {
+  grpc_call_stack_destroy(static_cast<grpc_call_stack*>(arg), nullptr, nullptr);
   gpr_free(arg);
 }
 
@@ -101,7 +95,7 @@
   grpc_channel_args chan_args;
   int* channel_data;
   int* call_data;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_slice path = grpc_slice_from_static_string("/service/method");
 
   arg.type = GRPC_ARG_INTEGER;
@@ -113,8 +107,8 @@
 
   channel_stack = static_cast<grpc_channel_stack*>(
       gpr_malloc(grpc_channel_stack_size(&filters, 1)));
-  grpc_channel_stack_init(&exec_ctx, 1, free_channel, channel_stack, &filters,
-                          1, &chan_args, nullptr, "test", channel_stack);
+  grpc_channel_stack_init(1, free_channel, channel_stack, &filters, 1,
+                          &chan_args, nullptr, "test", channel_stack);
   GPR_ASSERT(channel_stack->count == 1);
   channel_elem = grpc_channel_stack_element(channel_stack, 0);
   channel_data = (int*)channel_elem->channel_data;
@@ -132,8 +126,8 @@
       nullptr,                      /* arena */
       nullptr                       /* call_combiner */
   };
-  grpc_error* error = grpc_call_stack_init(&exec_ctx, channel_stack, 1,
-                                           free_call, call_stack, &args);
+  grpc_error* error =
+      grpc_call_stack_init(channel_stack, 1, free_call, call_stack, &args);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(call_stack->count == 1);
   call_elem = grpc_call_stack_element(call_stack, 0);
@@ -143,14 +137,13 @@
   GPR_ASSERT(*call_data == 0);
   GPR_ASSERT(*channel_data == 1);
 
-  GRPC_CALL_STACK_UNREF(&exec_ctx, call_stack, "done");
-  grpc_exec_ctx_flush(&exec_ctx);
+  GRPC_CALL_STACK_UNREF(call_stack, "done");
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(*channel_data == 2);
 
-  GRPC_CHANNEL_STACK_UNREF(&exec_ctx, channel_stack, "done");
+  GRPC_CHANNEL_STACK_UNREF(channel_stack, "done");
 
-  grpc_slice_unref_internal(&exec_ctx, path);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_unref_internal(path);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/channel/minimal_stack_is_minimal_test.cc b/test/core/channel/minimal_stack_is_minimal_test.cc
index e0cffa3..3495f60 100644
--- a/test/core/channel/minimal_stack_is_minimal_test.cc
+++ b/test/core/channel/minimal_stack_is_minimal_test.cc
@@ -125,12 +125,10 @@
     grpc_channel_stack_builder_set_transport(builder, &fake_transport);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_stack_builder_set_channel_arguments(&exec_ctx, builder,
-                                                     channel_args);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_stack_builder_set_channel_arguments(builder, channel_args);
     GPR_ASSERT(grpc_channel_init_create_stack(
-        &exec_ctx, builder, (grpc_channel_stack_type)channel_stack_type));
-    grpc_exec_ctx_finish(&exec_ctx);
+        builder, (grpc_channel_stack_type)channel_stack_type));
   }
 
   // build up our expectation list
@@ -212,10 +210,9 @@
   gpr_free(expect);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_stack_builder_destroy(&exec_ctx, builder);
-    grpc_channel_args_destroy(&exec_ctx, channel_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_stack_builder_destroy(builder);
+    grpc_channel_args_destroy(channel_args);
   }
 
   return result;
diff --git a/test/core/client_channel/lb_policies_test.cc b/test/core/client_channel/lb_policies_test.cc
index 5f8d3b8..847ea00 100644
--- a/test/core/client_channel/lb_policies_test.cc
+++ b/test/core/client_channel/lb_policies_test.cc
@@ -651,9 +651,8 @@
   grpc_channel_args* args = grpc_channel_args_copy_and_add(nullptr, &arg, 1);
   channel = grpc_insecure_channel_create("ipv4:127.0.0.1:1234", args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(args);
   }
   // Ensures that resolver returns.
   grpc_channel_check_connectivity_state(channel, true /* try_to_connect */);
@@ -959,7 +958,7 @@
 }
 
 int main(int argc, char** argv) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   test_spec* spec;
   size_t i;
   const size_t NUM_ITERS = 10;
@@ -969,9 +968,9 @@
   grpc_test_init(argc, argv);
   grpc_tracer_set_enabled("round_robin", 1);
 
-  GPR_ASSERT(grpc_lb_policy_create(&exec_ctx, "this-lb-policy-does-not-exist",
-                                   nullptr) == nullptr);
-  GPR_ASSERT(grpc_lb_policy_create(&exec_ctx, nullptr, nullptr) == nullptr);
+  GPR_ASSERT(grpc_lb_policy_create("this-lb-policy-does-not-exist", nullptr) ==
+             nullptr);
+  GPR_ASSERT(grpc_lb_policy_create(nullptr, nullptr) == nullptr);
 
   spec = test_spec_create(NUM_ITERS, NUM_SERVERS);
   /* everything is fine, all servers stay up the whole time and life's peachy
@@ -1025,7 +1024,6 @@
   test_ping();
   test_get_channel_info();
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/client_channel/parse_address_test.cc b/test/core/client_channel/parse_address_test.cc
index 94f76da..6d56961 100644
--- a/test/core/client_channel/parse_address_test.cc
+++ b/test/core/client_channel/parse_address_test.cc
@@ -24,6 +24,7 @@
 #include <sys/un.h>
 #endif
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 
 #include "src/core/lib/iomgr/exec_ctx.h"
@@ -33,8 +34,8 @@
 #ifdef GRPC_HAVE_UNIX_SOCKET
 
 static void test_grpc_parse_unix(const char* uri_text, const char* pathname) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
   grpc_resolved_address addr;
 
   GPR_ASSERT(1 == grpc_parse_unix(uri, &addr));
@@ -43,7 +44,6 @@
   GPR_ASSERT(0 == strcmp(addr_un->sun_path, pathname));
 
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 #else /* GRPC_HAVE_UNIX_SOCKET */
@@ -54,8 +54,8 @@
 
 static void test_grpc_parse_ipv4(const char* uri_text, const char* host,
                                  unsigned short port) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
   grpc_resolved_address addr;
   char ntop_buf[INET_ADDRSTRLEN];
 
@@ -68,13 +68,12 @@
   GPR_ASSERT(ntohs(addr_in->sin_port) == port);
 
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_grpc_parse_ipv6(const char* uri_text, const char* host,
                                  unsigned short port, uint32_t scope_id) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
   grpc_resolved_address addr;
   char ntop_buf[INET6_ADDRSTRLEN];
 
@@ -88,14 +87,16 @@
   GPR_ASSERT(addr_in6->sin6_scope_id == scope_id);
 
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   test_grpc_parse_unix("unix:/path/name", "/path/name");
   test_grpc_parse_ipv4("ipv4:192.0.2.1:12345", "192.0.2.1", 12345);
   test_grpc_parse_ipv6("ipv6:[2001:db8::1]:12345", "2001:db8::1", 12345, 0);
   test_grpc_parse_ipv6("ipv6:[2001:db8::1%252]:12345", "2001:db8::1", 12345, 2);
+
+  grpc_shutdown();
 }
diff --git a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
index dcf315e..18a795f 100644
--- a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
+++ b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
@@ -35,8 +35,7 @@
 static bool g_fail_resolution = true;
 static grpc_combiner* g_combiner;
 
-static void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
-                               const char* default_port,
+static void my_resolve_address(const char* addr, const char* default_port,
                                grpc_pollset_set* interested_parties,
                                grpc_closure* on_done,
                                grpc_resolved_addresses** addrs) {
@@ -55,13 +54,13 @@
         gpr_malloc(sizeof(*(*addrs)->addrs)));
     (*addrs)->addrs[0].len = 123;
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
 }
 
 static grpc_ares_request* my_dns_lookup_ares(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* addr,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** lb_addrs, bool check_grpclb,
+    const char* dns_server, const char* addr, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** lb_addrs, bool check_grpclb,
     char** service_config_json) {
   gpr_mu_lock(&g_mu);
   GPR_ASSERT(0 == strcmp("test", addr));
@@ -76,27 +75,26 @@
     grpc_lb_addresses_set_address(*lb_addrs, 0, nullptr, 0, false, nullptr,
                                   nullptr);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
   return nullptr;
 }
 
-static grpc_resolver* create_resolver(grpc_exec_ctx* exec_ctx,
-                                      const char* name) {
+static grpc_resolver* create_resolver(const char* name) {
   grpc_resolver_factory* factory = grpc_resolver_factory_lookup("dns");
-  grpc_uri* uri = grpc_uri_parse(exec_ctx, name, 0);
+  grpc_uri* uri = grpc_uri_parse(name, 0);
   GPR_ASSERT(uri);
   grpc_resolver_args args;
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
   grpc_resolver* resolver =
-      grpc_resolver_factory_create_resolver(exec_ctx, factory, &args);
+      grpc_resolver_factory_create_resolver(factory, &args);
   grpc_resolver_factory_unref(factory);
   grpc_uri_destroy(uri);
   return resolver;
 }
 
-static void on_done(grpc_exec_ctx* exec_ctx, void* ev, grpc_error* error) {
+static void on_done(void* ev, grpc_error* error) {
   gpr_event_set((gpr_event*)ev, (void*)1);
 }
 
@@ -107,9 +105,8 @@
     if (gpr_event_wait(ev, grpc_timeout_seconds_to_deadline(1))) return true;
     deadline_seconds--;
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_timer_check(&exec_ctx, nullptr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_timer_check(nullptr);
   }
   return false;
 }
@@ -120,16 +117,14 @@
   grpc_closure* on_complete;
 } next_args;
 
-static void call_resolver_next_now_lock_taken(grpc_exec_ctx* exec_ctx,
-                                              void* arg,
+static void call_resolver_next_now_lock_taken(void* arg,
                                               grpc_error* error_unused) {
   next_args* a = static_cast<next_args*>(arg);
-  grpc_resolver_next_locked(exec_ctx, a->resolver, a->result, a->on_complete);
+  grpc_resolver_next_locked(a->resolver, a->result, a->on_complete);
   gpr_free(a);
 }
 
-static void call_resolver_next_after_locking(grpc_exec_ctx* exec_ctx,
-                                             grpc_resolver* resolver,
+static void call_resolver_next_after_locking(grpc_resolver* resolver,
                                              grpc_channel_args** result,
                                              grpc_closure* on_complete) {
   next_args* a = static_cast<next_args*>(gpr_malloc(sizeof(*a)));
@@ -137,7 +132,6 @@
   a->result = result;
   a->on_complete = on_complete;
   GRPC_CLOSURE_SCHED(
-      exec_ctx,
       GRPC_CLOSURE_CREATE(call_resolver_next_now_lock_taken, a,
                           grpc_combiner_scheduler(resolver->combiner)),
       GRPC_ERROR_NONE);
@@ -153,30 +147,31 @@
   grpc_dns_lookup_ares = my_dns_lookup_ares;
   grpc_channel_args* result = (grpc_channel_args*)1;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_resolver* resolver = create_resolver(&exec_ctx, "dns:test");
-  gpr_event ev1;
-  gpr_event_init(&ev1);
-  call_resolver_next_after_locking(
-      &exec_ctx, resolver, &result,
-      GRPC_CLOSURE_CREATE(on_done, &ev1, grpc_schedule_on_exec_ctx));
-  grpc_exec_ctx_flush(&exec_ctx);
-  GPR_ASSERT(wait_loop(5, &ev1));
-  GPR_ASSERT(result == nullptr);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resolver* resolver = create_resolver("dns:test");
+    gpr_event ev1;
+    gpr_event_init(&ev1);
+    call_resolver_next_after_locking(
+        resolver, &result,
+        GRPC_CLOSURE_CREATE(on_done, &ev1, grpc_schedule_on_exec_ctx));
+    grpc_core::ExecCtx::Get()->Flush();
+    GPR_ASSERT(wait_loop(5, &ev1));
+    GPR_ASSERT(result == nullptr);
 
-  gpr_event ev2;
-  gpr_event_init(&ev2);
-  call_resolver_next_after_locking(
-      &exec_ctx, resolver, &result,
-      GRPC_CLOSURE_CREATE(on_done, &ev2, grpc_schedule_on_exec_ctx));
-  grpc_exec_ctx_flush(&exec_ctx);
-  GPR_ASSERT(wait_loop(30, &ev2));
-  GPR_ASSERT(result != nullptr);
+    gpr_event ev2;
+    gpr_event_init(&ev2);
+    call_resolver_next_after_locking(
+        resolver, &result,
+        GRPC_CLOSURE_CREATE(on_done, &ev2, grpc_schedule_on_exec_ctx));
+    grpc_core::ExecCtx::Get()->Flush();
+    GPR_ASSERT(wait_loop(30, &ev2));
+    GPR_ASSERT(result != nullptr);
 
-  grpc_channel_args_destroy(&exec_ctx, result);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test");
-  GRPC_COMBINER_UNREF(&exec_ctx, g_combiner, "test");
-  grpc_exec_ctx_finish(&exec_ctx);
+    grpc_channel_args_destroy(result);
+    GRPC_RESOLVER_UNREF(resolver, "test");
+    GRPC_COMBINER_UNREF(g_combiner, "test");
+  }
 
   grpc_shutdown();
   gpr_mu_destroy(&g_mu);
diff --git a/test/core/client_channel/resolvers/dns_resolver_test.cc b/test/core/client_channel/resolvers/dns_resolver_test.cc
index 4c040ca..8066790 100644
--- a/test/core/client_channel/resolvers/dns_resolver_test.cc
+++ b/test/core/client_channel/resolvers/dns_resolver_test.cc
@@ -28,8 +28,8 @@
 static grpc_combiner* g_combiner;
 
 static void test_succeeds(grpc_resolver_factory* factory, const char* string) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, string, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(string, 0);
   grpc_resolver_args args;
   grpc_resolver* resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be valid for '%s'", string,
@@ -38,16 +38,15 @@
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
-  resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &args);
   GPR_ASSERT(resolver != nullptr);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_succeeds");
+  GRPC_RESOLVER_UNREF(resolver, "test_succeeds");
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_fails(grpc_resolver_factory* factory, const char* string) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, string, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(string, 0);
   grpc_resolver_args args;
   grpc_resolver* resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be invalid for '%s'", string,
@@ -56,10 +55,9 @@
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
-  resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &args);
   GPR_ASSERT(resolver == nullptr);
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
@@ -82,9 +80,8 @@
 
   grpc_resolver_factory_unref(dns);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_COMBINER_UNREF(&exec_ctx, g_combiner, "test");
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GRPC_COMBINER_UNREF(g_combiner, "test");
   }
   grpc_shutdown();
 
diff --git a/test/core/client_channel/resolvers/fake_resolver_test.cc b/test/core/client_channel/resolvers/fake_resolver_test.cc
index d5538e9..d85cbb1 100644
--- a/test/core/client_channel/resolvers/fake_resolver_test.cc
+++ b/test/core/client_channel/resolvers/fake_resolver_test.cc
@@ -33,7 +33,7 @@
 #include "test/core/util/test_config.h"
 
 static grpc_resolver* build_fake_resolver(
-    grpc_exec_ctx* exec_ctx, grpc_combiner* combiner,
+    grpc_combiner* combiner,
     grpc_fake_resolver_response_generator* response_generator) {
   grpc_resolver_factory* factory = grpc_resolver_factory_lookup("fake");
   grpc_arg generator_arg =
@@ -44,7 +44,7 @@
   args.args = &channel_args;
   args.combiner = combiner;
   grpc_resolver* resolver =
-      grpc_resolver_factory_create_resolver(exec_ctx, factory, &args);
+      grpc_resolver_factory_create_resolver(factory, &args);
   grpc_resolver_factory_unref(factory);
   return resolver;
 }
@@ -55,7 +55,7 @@
   gpr_event ev;
 } on_resolution_arg;
 
-void on_resolution_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+void on_resolution_cb(void* arg, grpc_error* error) {
   on_resolution_arg* res = static_cast<on_resolution_arg*>(arg);
   // We only check the addresses channel arg because that's the only one
   // explicitly set by the test via
@@ -66,24 +66,23 @@
       grpc_lb_addresses_find_channel_arg(res->expected_resolver_result);
   GPR_ASSERT(
       grpc_lb_addresses_cmp(actual_lb_addresses, expected_lb_addresses) == 0);
-  grpc_channel_args_destroy(exec_ctx, res->resolver_result);
-  grpc_channel_args_destroy(exec_ctx, res->expected_resolver_result);
+  grpc_channel_args_destroy(res->resolver_result);
+  grpc_channel_args_destroy(res->expected_resolver_result);
   gpr_event_set(&res->ev, (void*)1);
 }
 
 static void test_fake_resolver() {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_combiner* combiner = grpc_combiner_create();
   // Create resolver.
   grpc_fake_resolver_response_generator* response_generator =
       grpc_fake_resolver_response_generator_create();
-  grpc_resolver* resolver =
-      build_fake_resolver(&exec_ctx, combiner, response_generator);
+  grpc_resolver* resolver = build_fake_resolver(combiner, response_generator);
   GPR_ASSERT(resolver != nullptr);
 
   // Setup expectations.
-  grpc_uri* uris[] = {grpc_uri_parse(&exec_ctx, "ipv4:10.2.1.1:1234", true),
-                      grpc_uri_parse(&exec_ctx, "ipv4:127.0.0.1:4321", true)};
+  grpc_uri* uris[] = {grpc_uri_parse("ipv4:10.2.1.1:1234", true),
+                      grpc_uri_parse("ipv4:127.0.0.1:4321", true)};
   const char* balancer_names[] = {"name1", "name2"};
   const bool is_balancer[] = {true, false};
   grpc_lb_addresses* addresses = grpc_lb_addresses_create(3, nullptr);
@@ -96,7 +95,7 @@
       grpc_lb_addresses_create_channel_arg(addresses);
   grpc_channel_args* results =
       grpc_channel_args_copy_and_add(nullptr, &addresses_arg, 1);
-  grpc_lb_addresses_destroy(&exec_ctx, addresses);
+  grpc_lb_addresses_destroy(addresses);
   on_resolution_arg on_res_arg;
   memset(&on_res_arg, 0, sizeof(on_res_arg));
   on_res_arg.expected_resolver_result = results;
@@ -106,17 +105,16 @@
 
   // Set resolver results and trigger first resolution. on_resolution_cb
   // performs the checks.
-  grpc_fake_resolver_response_generator_set_response(
-      &exec_ctx, response_generator, results);
-  grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result,
+  grpc_fake_resolver_response_generator_set_response(response_generator,
+                                                     results);
+  grpc_resolver_next_locked(resolver, &on_res_arg.resolver_result,
                             on_resolution);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
                             grpc_timeout_seconds_to_deadline(5)) != nullptr);
 
   // Setup update.
-  grpc_uri* uris_update[] = {
-      grpc_uri_parse(&exec_ctx, "ipv4:192.168.1.0:31416", true)};
+  grpc_uri* uris_update[] = {grpc_uri_parse("ipv4:192.168.1.0:31416", true)};
   const char* balancer_names_update[] = {"name3"};
   const bool is_balancer_update[] = {false};
   grpc_lb_addresses* addresses_update = grpc_lb_addresses_create(1, nullptr);
@@ -131,7 +129,7 @@
       grpc_lb_addresses_create_channel_arg(addresses_update);
   grpc_channel_args* results_update =
       grpc_channel_args_copy_and_add(nullptr, &addresses_update_arg, 1);
-  grpc_lb_addresses_destroy(&exec_ctx, addresses_update);
+  grpc_lb_addresses_destroy(addresses_update);
 
   // Setup expectations for the update.
   on_resolution_arg on_res_arg_update;
@@ -142,27 +140,27 @@
                                       grpc_combiner_scheduler(combiner));
 
   // Set updated resolver results and trigger a second resolution.
-  grpc_fake_resolver_response_generator_set_response(
-      &exec_ctx, response_generator, results_update);
-  grpc_resolver_next_locked(&exec_ctx, resolver,
-                            &on_res_arg_update.resolver_result, on_resolution);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_fake_resolver_response_generator_set_response(response_generator,
+                                                     results_update);
+  grpc_resolver_next_locked(resolver, &on_res_arg_update.resolver_result,
+                            on_resolution);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&on_res_arg_update.ev,
                             grpc_timeout_seconds_to_deadline(5)) != nullptr);
 
   // Requesting a new resolution without re-senting the response shouldn't
   // trigger the resolution callback.
   memset(&on_res_arg, 0, sizeof(on_res_arg));
-  grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result,
+  grpc_resolver_next_locked(resolver, &on_res_arg.resolver_result,
                             on_resolution);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
                             grpc_timeout_milliseconds_to_deadline(100)) ==
              nullptr);
 
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "test_fake_resolver");
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_fake_resolver");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "test_fake_resolver");
+  GRPC_RESOLVER_UNREF(resolver, "test_fake_resolver");
+
   grpc_fake_resolver_response_generator_unref(response_generator);
 }
 
diff --git a/test/core/client_channel/resolvers/sockaddr_resolver_test.cc b/test/core/client_channel/resolvers/sockaddr_resolver_test.cc
index dfa2d12..4d16a77 100644
--- a/test/core/client_channel/resolvers/sockaddr_resolver_test.cc
+++ b/test/core/client_channel/resolvers/sockaddr_resolver_test.cc
@@ -35,14 +35,14 @@
   grpc_channel_args* resolver_result;
 } on_resolution_arg;
 
-void on_resolution_cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+void on_resolution_cb(void* arg, grpc_error* error) {
   on_resolution_arg* res = static_cast<on_resolution_arg*>(arg);
-  grpc_channel_args_destroy(exec_ctx, res->resolver_result);
+  grpc_channel_args_destroy(res->resolver_result);
 }
 
 static void test_succeeds(grpc_resolver_factory* factory, const char* string) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, string, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(string, 0);
   grpc_resolver_args args;
   grpc_resolver* resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be valid for '%s'", string,
@@ -51,7 +51,7 @@
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
-  resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &args);
   GPR_ASSERT(resolver != nullptr);
 
   on_resolution_arg on_res_arg;
@@ -60,16 +60,16 @@
   grpc_closure* on_resolution = GRPC_CLOSURE_CREATE(
       on_resolution_cb, &on_res_arg, grpc_schedule_on_exec_ctx);
 
-  grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result,
+  grpc_resolver_next_locked(resolver, &on_res_arg.resolver_result,
                             on_resolution);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_succeeds");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_RESOLVER_UNREF(resolver, "test_succeeds");
+
   grpc_uri_destroy(uri);
 }
 
 static void test_fails(grpc_resolver_factory* factory, const char* string) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, string, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(string, 0);
   grpc_resolver_args args;
   grpc_resolver* resolver;
   gpr_log(GPR_DEBUG, "test: '%s' should be invalid for '%s'", string,
@@ -78,10 +78,9 @@
   memset(&args, 0, sizeof(args));
   args.uri = uri;
   args.combiner = g_combiner;
-  resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
+  resolver = grpc_resolver_factory_create_resolver(factory, &args);
   GPR_ASSERT(resolver == nullptr);
   grpc_uri_destroy(uri);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
@@ -112,9 +111,8 @@
   grpc_resolver_factory_unref(ipv6);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_COMBINER_UNREF(&exec_ctx, g_combiner, "test");
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GRPC_COMBINER_UNREF(g_combiner, "test");
   }
   grpc_shutdown();
 
diff --git a/test/core/client_channel/uri_fuzzer_test.cc b/test/core/client_channel/uri_fuzzer_test.cc
index ba31793..ee38453 100644
--- a/test/core/client_channel/uri_fuzzer_test.cc
+++ b/test/core/client_channel/uri_fuzzer_test.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/filters/client_channel/uri_parser.h"
@@ -33,12 +34,18 @@
   memcpy(s, data, size);
   s[size] = 0;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* x;
-  if ((x = grpc_uri_parse(&exec_ctx, s, 1))) {
-    grpc_uri_destroy(x);
+  grpc_init();
+
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_uri* x;
+    if ((x = grpc_uri_parse(s, 1))) {
+      grpc_uri_destroy(x);
+    }
+
+    gpr_free(s);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
-  gpr_free(s);
+
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/client_channel/uri_parser_test.cc b/test/core/client_channel/uri_parser_test.cc
index 30183f9..254bfdd 100644
--- a/test/core/client_channel/uri_parser_test.cc
+++ b/test/core/client_channel/uri_parser_test.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 
 #include "src/core/lib/iomgr/exec_ctx.h"
@@ -28,29 +29,28 @@
 static void test_succeeds(const char* uri_text, const char* scheme,
                           const char* authority, const char* path,
                           const char* query, const char* fragment) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_uri* uri = grpc_uri_parse(uri_text, 0);
   GPR_ASSERT(uri);
   GPR_ASSERT(0 == strcmp(scheme, uri->scheme));
   GPR_ASSERT(0 == strcmp(authority, uri->authority));
   GPR_ASSERT(0 == strcmp(path, uri->path));
   GPR_ASSERT(0 == strcmp(query, uri->query));
   GPR_ASSERT(0 == strcmp(fragment, uri->fragment));
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_uri_destroy(uri);
 }
 
 static void test_fails(const char* uri_text) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(nullptr == grpc_uri_parse(&exec_ctx, uri_text, 0));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(nullptr == grpc_uri_parse(uri_text, 0));
 }
 
 static void test_query_parts() {
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     const char* uri_text = "http://foo/path?a&b=B&c=&#frag";
-    grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -77,14 +77,14 @@
     GPR_ASSERT(nullptr == grpc_uri_get_query_arg(uri, ""));
 
     GPR_ASSERT(0 == strcmp("frag", uri->fragment));
-    grpc_exec_ctx_finish(&exec_ctx);
+
     grpc_uri_destroy(uri);
   }
   {
     /* test the current behavior of multiple query part values */
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     const char* uri_text = "http://auth/path?foo=bar=baz&foobar==";
-    grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -96,14 +96,13 @@
     GPR_ASSERT(0 == strcmp("bar", grpc_uri_get_query_arg(uri, "foo")));
     GPR_ASSERT(0 == strcmp("", grpc_uri_get_query_arg(uri, "foobar")));
 
-    grpc_exec_ctx_finish(&exec_ctx);
     grpc_uri_destroy(uri);
   }
   {
     /* empty query */
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     const char* uri_text = "http://foo/path";
-    grpc_uri* uri = grpc_uri_parse(&exec_ctx, uri_text, 0);
+    grpc_uri* uri = grpc_uri_parse(uri_text, 0);
     GPR_ASSERT(uri);
 
     GPR_ASSERT(0 == strcmp("http", uri->scheme));
@@ -114,13 +113,14 @@
     GPR_ASSERT(nullptr == uri->query_parts);
     GPR_ASSERT(nullptr == uri->query_parts_values);
     GPR_ASSERT(0 == strcmp("", uri->fragment));
-    grpc_exec_ctx_finish(&exec_ctx);
+
     grpc_uri_destroy(uri);
   }
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_succeeds("http://www.google.com", "http", "www.google.com", "", "", "");
   test_succeeds("dns:///foo", "dns", "", "/foo", "", "");
   test_succeeds("http://www.google.com:90", "http", "www.google.com:90", "", "",
@@ -148,5 +148,6 @@
   test_fails("http://foo?bar#lol#");
 
   test_query_parts();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/compression/algorithm_test.cc b/test/core/compression/algorithm_test.cc
index 2f1d8bc..9e811e9 100644
--- a/test/core/compression/algorithm_test.cc
+++ b/test/core/compression/algorithm_test.cc
@@ -39,7 +39,7 @@
     grpc_compression_algorithm parsed;
     grpc_slice mdstr;
     grpc_mdelem mdelem;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(
         grpc_compression_algorithm_name((grpc_compression_algorithm)i, &name));
     GPR_ASSERT(grpc_compression_algorithm_parse(
@@ -51,9 +51,8 @@
     mdelem = grpc_compression_encoding_mdelem(parsed);
     GPR_ASSERT(grpc_slice_eq(GRPC_MDVALUE(mdelem), mdstr));
     GPR_ASSERT(grpc_slice_eq(GRPC_MDKEY(mdelem), GRPC_MDSTR_GRPC_ENCODING));
-    grpc_slice_unref_internal(&exec_ctx, mdstr);
-    GRPC_MDELEM_UNREF(&exec_ctx, mdelem);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_slice_unref_internal(mdstr);
+    GRPC_MDELEM_UNREF(mdelem);
   }
 
   /* test failure */
@@ -62,7 +61,7 @@
 }
 
 static void test_algorithm_failure(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_slice mdstr;
 
   gpr_log(GPR_DEBUG, "test_algorithm_failure");
@@ -83,8 +82,7 @@
       grpc_compression_algorithm_slice(static_cast<grpc_compression_algorithm>(
           static_cast<int>(GRPC_COMPRESS_ALGORITHMS_COUNT) + 1)),
       grpc_empty_slice()));
-  grpc_slice_unref_internal(&exec_ctx, mdstr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_unref_internal(mdstr);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/compression/message_compress_test.cc b/test/core/compression/message_compress_test.cc
index 676415b..6ca07b7 100644
--- a/test/core/compression/message_compress_test.cc
+++ b/test/core/compression/message_compress_test.cc
@@ -70,10 +70,8 @@
   grpc_split_slices_to_buffer(uncompressed_split_mode, &value, 1, &input);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    was_compressed =
-        grpc_msg_compress(&exec_ctx, algorithm, &input, &compressed_raw);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    was_compressed = grpc_msg_compress(algorithm, &input, &compressed_raw);
   }
   GPR_ASSERT(input.count > 0);
 
@@ -92,11 +90,9 @@
   grpc_split_slice_buffer(compressed_split_mode, &compressed_raw, &compressed);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(grpc_msg_decompress(
-        &exec_ctx, was_compressed ? algorithm : GRPC_COMPRESS_NONE, &compressed,
-        &output));
-    grpc_exec_ctx_finish(&exec_ctx);
+        was_compressed ? algorithm : GRPC_COMPRESS_NONE, &compressed, &output));
   }
 
   final = grpc_slice_merge(output.slices, output.count);
@@ -156,11 +152,11 @@
 
   for (int i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
     if (i == GRPC_COMPRESS_NONE) continue;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GPR_ASSERT(0 == grpc_msg_compress(
-                        &exec_ctx, static_cast<grpc_compression_algorithm>(i),
-                        &input, &output));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GPR_ASSERT(0 ==
+               grpc_msg_compress(static_cast<grpc_compression_algorithm>(i),
+                                 &input, &output));
+
     GPR_ASSERT(1 == output.count);
   }
 
@@ -180,9 +176,9 @@
   grpc_slice_buffer_init(&output);
   grpc_slice_buffer_add(&input, create_test_value(ONE_MB_A));
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   /* compress it */
-  grpc_msg_compress(&exec_ctx, GRPC_COMPRESS_GZIP, &input, &corrupted);
+  grpc_msg_compress(GRPC_COMPRESS_GZIP, &input, &corrupted);
   /* corrupt the output by smashing the CRC */
   GPR_ASSERT(corrupted.count > 1);
   GPR_ASSERT(GRPC_SLICE_LENGTH(corrupted.slices[1]) > 8);
@@ -190,9 +186,7 @@
   memcpy(GRPC_SLICE_START_PTR(corrupted.slices[1]) + idx, &bad, 4);
 
   /* try (and fail) to decompress the corrupted compresed buffer */
-  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_GZIP, &corrupted,
-                                      &output));
-  grpc_exec_ctx_finish(&exec_ctx);
+  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_GZIP, &corrupted, &output));
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&corrupted);
@@ -211,10 +205,8 @@
                   "\x78\xda\x63\x60\x60\x60\x00\x00\x00\x04\x00\x01\x99", 13));
 
   /* try (and fail) to decompress the invalid compresed buffer */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_DEFLATE, &input,
-                                      &output));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_DEFLATE, &input, &output));
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -230,10 +222,8 @@
                         grpc_slice_from_copied_buffer("\x78\xda\xff\xff", 4));
 
   /* try (and fail) to decompress the invalid compresed buffer */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(0 == grpc_msg_decompress(&exec_ctx, GRPC_COMPRESS_DEFLATE, &input,
-                                      &output));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(0 == grpc_msg_decompress(GRPC_COMPRESS_DEFLATE, &input, &output));
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -249,17 +239,15 @@
   grpc_slice_buffer_add(
       &input, grpc_slice_from_copied_string("Never gonna give you up"));
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  was_compressed = grpc_msg_compress(&exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT,
-                                     &input, &output);
+  grpc_core::ExecCtx exec_ctx;
+  was_compressed =
+      grpc_msg_compress(GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
   GPR_ASSERT(0 == was_compressed);
 
-  was_compressed = grpc_msg_compress(&exec_ctx,
-                                     static_cast<grpc_compression_algorithm>(
+  was_compressed = grpc_msg_compress(static_cast<grpc_compression_algorithm>(
                                          GRPC_COMPRESS_ALGORITHMS_COUNT + 123),
                                      &input, &output);
   GPR_ASSERT(0 == was_compressed);
-  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
@@ -275,18 +263,16 @@
   grpc_slice_buffer_add(&input,
                         grpc_slice_from_copied_string(
                             "I'm not really compressed but it doesn't matter"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  was_decompressed = grpc_msg_decompress(
-      &exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
+  grpc_core::ExecCtx exec_ctx;
+  was_decompressed =
+      grpc_msg_decompress(GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
   GPR_ASSERT(0 == was_decompressed);
 
   was_decompressed =
-      grpc_msg_decompress(&exec_ctx,
-                          static_cast<grpc_compression_algorithm>(
+      grpc_msg_decompress(static_cast<grpc_compression_algorithm>(
                               GRPC_COMPRESS_ALGORITHMS_COUNT + 123),
                           &input, &output);
   GPR_ASSERT(0 == was_decompressed);
-  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_slice_buffer_destroy(&input);
   grpc_slice_buffer_destroy(&output);
diff --git a/test/core/debug/stats_test.cc b/test/core/debug/stats_test.cc
index 5fae61f..e60e54b 100644
--- a/test/core/debug/stats_test.cc
+++ b/test/core/debug/stats_test.cc
@@ -49,9 +49,8 @@
   for (int i = 0; i < GRPC_STATS_COUNTER_COUNT; i++) {
     Snapshot snapshot;
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_STATS_INC_COUNTER(&exec_ctx, (grpc_stats_counters)i);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GRPC_STATS_INC_COUNTER((grpc_stats_counters)i);
 
     EXPECT_EQ(snapshot.delta().counters[i], 1);
   }
@@ -60,9 +59,8 @@
 TEST(StatsTest, IncSpecificCounter) {
   Snapshot snapshot;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_STATS_INC_SYSCALL_POLL(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_STATS_INC_SYSCALL_POLL();
 
   EXPECT_EQ(snapshot.delta().counters[GRPC_STATS_COUNTER_SYSCALL_POLL], 1);
 }
@@ -94,9 +92,8 @@
     for (auto j : test_values) {
       Snapshot snapshot;
 
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_stats_inc_histogram[kHistogram](&exec_ctx, j);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_stats_inc_histogram[kHistogram](j);
 
       auto delta = snapshot.delta();
 
diff --git a/test/core/end2end/bad_server_response_test.cc b/test/core/end2end/bad_server_response_test.cc
index b0c6ae9..93809ac 100644
--- a/test/core/end2end/bad_server_response_test.cc
+++ b/test/core/end2end/bad_server_response_test.cc
@@ -91,22 +91,22 @@
 
 static void* tag(intptr_t t) { return (void*)t; }
 
-static void done_write(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void done_write(void* arg, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
 
   gpr_atm_rel_store(&state.done_atm, 1);
 }
 
-static void handle_write(grpc_exec_ctx* exec_ctx) {
+static void handle_write() {
   grpc_slice slice = grpc_slice_from_copied_buffer(
       state.response_payload, state.response_payload_length);
 
   grpc_slice_buffer_reset_and_unref(&state.outgoing_buffer);
   grpc_slice_buffer_add(&state.outgoing_buffer, slice);
-  grpc_endpoint_write(exec_ctx, state.tcp, &state.outgoing_buffer, &on_write);
+  grpc_endpoint_write(state.tcp, &state.outgoing_buffer, &on_write);
 }
 
-static void handle_read(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void handle_read(void* arg, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   state.incoming_data_length += state.temp_incoming_buffer.length;
 
@@ -123,14 +123,13 @@
           SERVER_INCOMING_DATA_LENGTH_LOWER_THRESHOLD);
   if (state.incoming_data_length >=
       SERVER_INCOMING_DATA_LENGTH_LOWER_THRESHOLD) {
-    handle_write(exec_ctx);
+    handle_write();
   } else {
-    grpc_endpoint_read(exec_ctx, state.tcp, &state.temp_incoming_buffer,
-                       &on_read);
+    grpc_endpoint_read(state.tcp, &state.temp_incoming_buffer, &on_read);
   }
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
+static void on_connect(void* arg, grpc_endpoint* tcp,
                        grpc_pollset* accepting_pollset,
                        grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
@@ -141,8 +140,8 @@
   grpc_slice_buffer_init(&state.outgoing_buffer);
   state.tcp = tcp;
   state.incoming_data_length = 0;
-  grpc_endpoint_add_to_pollset(exec_ctx, tcp, server->pollset);
-  grpc_endpoint_read(exec_ctx, tcp, &state.temp_incoming_buffer, &on_read);
+  grpc_endpoint_add_to_pollset(tcp, server->pollset);
+  grpc_endpoint_read(tcp, &state.temp_incoming_buffer, &on_read);
 }
 
 static gpr_timespec n_sec_deadline(int seconds) {
@@ -217,10 +216,10 @@
   cq_verifier_destroy(cqv);
 }
 
-static void cleanup_rpc(grpc_exec_ctx* exec_ctx) {
+static void cleanup_rpc() {
   grpc_event ev;
-  grpc_slice_buffer_destroy_internal(exec_ctx, &state.temp_incoming_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &state.outgoing_buffer);
+  grpc_slice_buffer_destroy_internal(&state.temp_incoming_buffer);
+  grpc_slice_buffer_destroy_internal(&state.outgoing_buffer);
   grpc_call_unref(state.call);
   grpc_completion_queue_shutdown(state.cq);
   do {
@@ -262,7 +261,7 @@
   poll_args* pa = (poll_args*)gpr_malloc(sizeof(*pa));
   pa->server = server;
   pa->signal_when_done = signal_when_done;
-  gpr_thd_new(&id, actually_poll_server, pa, nullptr);
+  gpr_thd_new(&id, "grpc_poll_server", actually_poll_server, pa, nullptr);
 }
 
 static void run_test(const char* response_payload,
@@ -270,7 +269,7 @@
                      grpc_status_code expected_status,
                      const char* expected_detail) {
   test_tcp_server test_server;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_event ev;
 
   grpc_init();
@@ -287,11 +286,11 @@
   gpr_event_wait(&ev, gpr_inf_future(GPR_CLOCK_REALTIME));
 
   /* clean up */
-  grpc_endpoint_shutdown(&exec_ctx, state.tcp,
+  grpc_endpoint_shutdown(state.tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
-  grpc_endpoint_destroy(&exec_ctx, state.tcp);
-  cleanup_rpc(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_destroy(state.tcp);
+  cleanup_rpc();
+  grpc_core::ExecCtx::Get()->Flush();
   test_tcp_server_destroy(&test_server);
 
   grpc_shutdown();
@@ -299,6 +298,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   /* status defined in hpack static table */
   run_test(HTTP2_RESP(204), sizeof(HTTP2_RESP(204)) - 1, GRPC_STATUS_CANCELLED,
@@ -337,5 +337,6 @@
   run_test(HTTP1_RESP, sizeof(HTTP1_RESP) - 1, GRPC_STATUS_UNAVAILABLE,
            HTTP1_DETAIL_MSG);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/end2end/connection_refused_test.cc b/test/core/end2end/connection_refused_test.cc
index f3f2dda..ca6d17e 100644
--- a/test/core/end2end/connection_refused_test.cc
+++ b/test/core/end2end/connection_refused_test.cc
@@ -133,9 +133,8 @@
   grpc_metadata_array_destroy(&trailing_metadata_recv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    if (args != nullptr) grpc_channel_args_destroy(&exec_ctx, args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    if (args != nullptr) grpc_channel_args_destroy(args);
   }
 
   grpc_shutdown();
diff --git a/test/core/end2end/fixtures/h2_census.cc b/test/core/end2end/fixtures/h2_census.cc
index fed8ead..75c80aa 100644
--- a/test/core/end2end/fixtures/h2_census.cc
+++ b/test/core/end2end/fixtures/h2_census.cc
@@ -75,9 +75,8 @@
       grpc_insecure_channel_create(ffd->localaddr, client_args, nullptr);
   GPR_ASSERT(f->client);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
   }
 }
 
@@ -92,9 +91,8 @@
   server_args = grpc_channel_args_copy_and_add(server_args, &arg, 1);
   f->server = grpc_server_create(server_args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(server_args);
   }
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
diff --git a/test/core/end2end/fixtures/h2_compress.cc b/test/core/end2end/fixtures/h2_compress.cc
index ea8990f..5b91815 100644
--- a/test/core/end2end/fixtures/h2_compress.cc
+++ b/test/core/end2end/fixtures/h2_compress.cc
@@ -66,9 +66,8 @@
   fullstack_compression_fixture_data* ffd =
       static_cast<fullstack_compression_fixture_data*>(f->fixture_data);
   if (ffd->client_args_compression != nullptr) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, ffd->client_args_compression);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(ffd->client_args_compression);
   }
   ffd->client_args_compression = grpc_channel_args_set_compression_algorithm(
       client_args, GRPC_COMPRESS_GZIP);
@@ -81,9 +80,8 @@
   fullstack_compression_fixture_data* ffd =
       static_cast<fullstack_compression_fixture_data*>(f->fixture_data);
   if (ffd->server_args_compression != nullptr) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, ffd->server_args_compression);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(ffd->server_args_compression);
   }
   ffd->server_args_compression = grpc_channel_args_set_compression_algorithm(
       server_args, GRPC_COMPRESS_GZIP);
@@ -97,14 +95,13 @@
 }
 
 void chttp2_tear_down_fullstack_compression(grpc_end2end_test_fixture* f) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   fullstack_compression_fixture_data* ffd =
       static_cast<fullstack_compression_fixture_data*>(f->fixture_data);
-  grpc_channel_args_destroy(&exec_ctx, ffd->client_args_compression);
-  grpc_channel_args_destroy(&exec_ctx, ffd->server_args_compression);
+  grpc_channel_args_destroy(ffd->client_args_compression);
+  grpc_channel_args_destroy(ffd->server_args_compression);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /* All test configurations */
diff --git a/test/core/end2end/fixtures/h2_fd.cc b/test/core/end2end/fixtures/h2_fd.cc
index 97f4b71..9157ab0 100644
--- a/test/core/end2end/fixtures/h2_fd.cc
+++ b/test/core/end2end/fixtures/h2_fd.cc
@@ -68,20 +68,18 @@
 
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   sp_fixture_data* sfd = static_cast<sp_fixture_data*>(f->fixture_data);
 
   GPR_ASSERT(!f->client);
   f->client = grpc_insecure_channel_create_from_fd(
       "fixture_client", sfd->fd_pair[0], client_args);
   GPR_ASSERT(f->client);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* server_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   sp_fixture_data* sfd = static_cast<sp_fixture_data*>(f->fixture_data);
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, nullptr);
@@ -90,8 +88,6 @@
   grpc_server_start(f->server);
 
   grpc_server_add_insecure_channel_from_fd(f->server, nullptr, sfd->fd_pair[1]);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture* f) {
diff --git a/test/core/end2end/fixtures/h2_full+workarounds.cc b/test/core/end2end/fixtures/h2_full+workarounds.cc
index 71a497d..237841d 100644
--- a/test/core/end2end/fixtures/h2_full+workarounds.cc
+++ b/test/core/end2end/fixtures/h2_full+workarounds.cc
@@ -72,7 +72,7 @@
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture* f,
                                   grpc_channel_args* server_args) {
   int i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   fullstack_fixture_data* ffd =
       static_cast<fullstack_fixture_data*>(f->fixture_data);
   grpc_arg args[GRPC_MAX_WORKAROUND_ID];
@@ -90,8 +90,7 @@
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
   grpc_server_start(f->server);
-  grpc_channel_args_destroy(&exec_ctx, server_args_new);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_args_destroy(server_args_new);
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture* f) {
diff --git a/test/core/end2end/fixtures/h2_load_reporting.cc b/test/core/end2end/fixtures/h2_load_reporting.cc
index 7486b6a..fda5f4b 100644
--- a/test/core/end2end/fixtures/h2_load_reporting.cc
+++ b/test/core/end2end/fixtures/h2_load_reporting.cc
@@ -78,9 +78,8 @@
   server_args = grpc_channel_args_copy_and_add(server_args, &arg, 1);
   f->server = grpc_server_create(server_args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(server_args);
   }
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
diff --git a/test/core/end2end/fixtures/h2_oauth2.cc b/test/core/end2end/fixtures/h2_oauth2.cc
index 1642cb0..5fed443 100644
--- a/test/core/end2end/fixtures/h2_oauth2.cc
+++ b/test/core/end2end/fixtures/h2_oauth2.cc
@@ -143,11 +143,11 @@
 
 static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
     grpc_end2end_test_fixture* f, grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_credentials* ssl_creds =
       grpc_ssl_credentials_create(test_root_cert, nullptr, nullptr);
   grpc_call_credentials* oauth2_creds = grpc_md_only_test_credentials_create(
-      &exec_ctx, "authorization", oauth2_md, true /* is_async */);
+      "authorization", oauth2_md, true /* is_async */);
   grpc_channel_credentials* ssl_oauth2_creds =
       grpc_composite_channel_credentials_create(ssl_creds, oauth2_creds,
                                                 nullptr);
@@ -158,10 +158,9 @@
   grpc_channel_args* new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_oauth2_creds);
-  grpc_channel_args_destroy(&exec_ctx, new_client_args);
+  grpc_channel_args_destroy(new_client_args);
   grpc_channel_credentials_release(ssl_creds);
   grpc_call_credentials_release(oauth2_creds);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static int fail_server_auth_check(grpc_channel_args* server_args) {
diff --git a/test/core/end2end/fixtures/h2_sockpair+trace.cc b/test/core/end2end/fixtures/h2_sockpair+trace.cc
index fe4ab74..9807e92 100644
--- a/test/core/end2end/fixtures/h2_sockpair+trace.cc
+++ b/test/core/end2end/fixtures/h2_sockpair+trace.cc
@@ -50,12 +50,11 @@
 
 static void server_setup_transport(void* ts, grpc_transport* transport) {
   grpc_end2end_test_fixture* f = static_cast<grpc_end2end_test_fixture*>(ts);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, nullptr,
+  grpc_endpoint_add_to_pollset(sfd->server, grpc_cq_pollset(f->cq));
+  grpc_server_setup_transport(f->server, transport, nullptr,
                               grpc_server_get_channel_args(f->server));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 typedef struct {
@@ -63,13 +62,11 @@
   grpc_channel_args* client_args;
 } sp_client_setup;
 
-static void client_setup_transport(grpc_exec_ctx* exec_ctx, void* ts,
-                                   grpc_transport* transport) {
+static void client_setup_transport(void* ts, grpc_transport* transport) {
   sp_client_setup* cs = static_cast<sp_client_setup*>(ts);
 
-  cs->f->client =
-      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
-                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  cs->f->client = grpc_channel_create("socketpair-target", cs->client_args,
+                                      GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -90,34 +87,30 @@
 
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   sp_client_setup cs;
   cs.client_args = client_args;
   cs.f = f;
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, client_args, sfd->client, 1);
-  client_setup_transport(&exec_ctx, &cs, transport);
+  transport = grpc_create_chttp2_transport(client_args, sfd->client, true);
+  client_setup_transport(&cs, transport);
   GPR_ASSERT(f->client);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* server_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, nullptr);
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   grpc_server_start(f->server);
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, server_args, sfd->server, 0);
+  transport = grpc_create_chttp2_transport(server_args, sfd->server, false);
   server_setup_transport(f, transport);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture* f) {
@@ -133,7 +126,6 @@
 
 int main(int argc, char** argv) {
   size_t i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   /* force tracing on, with a value to force many
      code paths in trace.c to be taken */
@@ -147,7 +139,6 @@
   grpc_test_init(argc, argv);
   grpc_end2end_tests_pre_init();
   grpc_init();
-  grpc_exec_ctx_finish(&exec_ctx);
 
   GPR_ASSERT(0 == grpc_tracer_set_enabled("also-doesnt-exist", 0));
   GPR_ASSERT(1 == grpc_tracer_set_enabled("http", 1));
diff --git a/test/core/end2end/fixtures/h2_sockpair.cc b/test/core/end2end/fixtures/h2_sockpair.cc
index 59a3a6d..b68279f 100644
--- a/test/core/end2end/fixtures/h2_sockpair.cc
+++ b/test/core/end2end/fixtures/h2_sockpair.cc
@@ -44,12 +44,11 @@
 
 static void server_setup_transport(void* ts, grpc_transport* transport) {
   grpc_end2end_test_fixture* f = static_cast<grpc_end2end_test_fixture*>(ts);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, nullptr,
+  grpc_endpoint_add_to_pollset(sfd->server, grpc_cq_pollset(f->cq));
+  grpc_server_setup_transport(f->server, transport, nullptr,
                               grpc_server_get_channel_args(f->server));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 typedef struct {
@@ -57,13 +56,11 @@
   grpc_channel_args* client_args;
 } sp_client_setup;
 
-static void client_setup_transport(grpc_exec_ctx* exec_ctx, void* ts,
-                                   grpc_transport* transport) {
+static void client_setup_transport(void* ts, grpc_transport* transport) {
   sp_client_setup* cs = static_cast<sp_client_setup*>(ts);
 
-  cs->f->client =
-      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
-                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  cs->f->client = grpc_channel_create("socketpair-target", cs->client_args,
+                                      GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -84,34 +81,30 @@
 
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   sp_client_setup cs;
   cs.client_args = client_args;
   cs.f = f;
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, client_args, sfd->client, 1);
-  client_setup_transport(&exec_ctx, &cs, transport);
+  transport = grpc_create_chttp2_transport(client_args, sfd->client, true);
+  client_setup_transport(&cs, transport);
   GPR_ASSERT(f->client);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* server_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, nullptr);
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   grpc_server_start(f->server);
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, server_args, sfd->server, 0);
+  transport = grpc_create_chttp2_transport(server_args, sfd->server, false);
   server_setup_transport(f, transport);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture* f) {
diff --git a/test/core/end2end/fixtures/h2_sockpair_1byte.cc b/test/core/end2end/fixtures/h2_sockpair_1byte.cc
index d935efb..350be13 100644
--- a/test/core/end2end/fixtures/h2_sockpair_1byte.cc
+++ b/test/core/end2end/fixtures/h2_sockpair_1byte.cc
@@ -44,12 +44,11 @@
 
 static void server_setup_transport(void* ts, grpc_transport* transport) {
   grpc_end2end_test_fixture* f = static_cast<grpc_end2end_test_fixture*>(ts);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
-  grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, nullptr,
+  grpc_endpoint_add_to_pollset(sfd->server, grpc_cq_pollset(f->cq));
+  grpc_server_setup_transport(f->server, transport, nullptr,
                               grpc_server_get_channel_args(f->server));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 typedef struct {
@@ -57,13 +56,11 @@
   grpc_channel_args* client_args;
 } sp_client_setup;
 
-static void client_setup_transport(grpc_exec_ctx* exec_ctx, void* ts,
-                                   grpc_transport* transport) {
+static void client_setup_transport(void* ts, grpc_transport* transport) {
   sp_client_setup* cs = static_cast<sp_client_setup*>(ts);
 
-  cs->f->client =
-      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
-                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
+  cs->f->client = grpc_channel_create("socketpair-target", cs->client_args,
+                                      GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -95,34 +92,30 @@
 
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* client_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   sp_client_setup cs;
   cs.client_args = client_args;
   cs.f = f;
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, client_args, sfd->client, 1);
-  client_setup_transport(&exec_ctx, &cs, transport);
+  transport = grpc_create_chttp2_transport(client_args, sfd->client, true);
+  client_setup_transport(&cs, transport);
   GPR_ASSERT(f->client);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture* f,
                                           grpc_channel_args* server_args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_pair* sfd = static_cast<grpc_endpoint_pair*>(f->fixture_data);
   grpc_transport* transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, nullptr);
   grpc_server_register_completion_queue(f->server, f->cq, nullptr);
   grpc_server_start(f->server);
-  transport =
-      grpc_create_chttp2_transport(&exec_ctx, server_args, sfd->server, 0);
+  transport = grpc_create_chttp2_transport(server_args, sfd->server, false);
   server_setup_transport(f, transport);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 }
 
 static void chttp2_tear_down_socketpair(grpc_end2end_test_fixture* f) {
diff --git a/test/core/end2end/fixtures/h2_ssl.cc b/test/core/end2end/fixtures/h2_ssl.cc
index 3d7e2e3..9a0680c 100644
--- a/test/core/end2end/fixtures/h2_ssl.cc
+++ b/test/core/end2end/fixtures/h2_ssl.cc
@@ -110,9 +110,8 @@
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
 }
 
diff --git a/test/core/end2end/fixtures/h2_ssl_proxy.cc b/test/core/end2end/fixtures/h2_ssl_proxy.cc
index f8d5a69..5ddbdef 100644
--- a/test/core/end2end/fixtures/h2_ssl_proxy.cc
+++ b/test/core/end2end/fixtures/h2_ssl_proxy.cc
@@ -66,9 +66,8 @@
       grpc_secure_channel_create(ssl_creds, target, new_client_args, nullptr);
   grpc_channel_credentials_release(ssl_creds);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
   return channel;
 }
@@ -148,9 +147,8 @@
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
 }
 
diff --git a/test/core/end2end/fixtures/http_proxy_fixture.cc b/test/core/end2end/fixtures/http_proxy_fixture.cc
index ac0c953..137f7c9 100644
--- a/test/core/end2end/fixtures/http_proxy_fixture.cc
+++ b/test/core/end2end/fixtures/http_proxy_fixture.cc
@@ -68,6 +68,9 @@
 // Connection handling
 //
 
+// proxy_connection structure is only accessed in the closures which are all
+// scheduled under the same combiner lock. So there is is no need for a mutex to
+// protect this structure.
 typedef struct proxy_connection {
   grpc_end2end_http_proxy* proxy;
 
@@ -78,6 +81,8 @@
 
   grpc_pollset_set* pollset_set;
 
+  // NOTE: All the closures execute under proxy->combiner lock. Which means
+  // there will not be any data-races between the closures
   grpc_closure on_read_request_done;
   grpc_closure on_server_connect_done;
   grpc_closure on_write_response_done;
@@ -86,6 +91,13 @@
   grpc_closure on_server_read_done;
   grpc_closure on_server_write_done;
 
+  bool client_read_failed : 1;
+  bool client_write_failed : 1;
+  bool client_shutdown : 1;
+  bool server_read_failed : 1;
+  bool server_write_failed : 1;
+  bool server_shutdown : 1;
+
   grpc_slice_buffer client_read_buffer;
   grpc_slice_buffer client_deferred_write_buffer;
   bool client_is_writing;
@@ -104,24 +116,21 @@
 }
 
 // Helper function to destroy the proxy connection.
-static void proxy_connection_unref(grpc_exec_ctx* exec_ctx,
-                                   proxy_connection* conn, const char* reason) {
+static void proxy_connection_unref(proxy_connection* conn, const char* reason) {
   if (gpr_unref(&conn->refcount)) {
     gpr_log(GPR_DEBUG, "endpoints: %p %p", conn->client_endpoint,
             conn->server_endpoint);
-    grpc_endpoint_destroy(exec_ctx, conn->client_endpoint);
+    grpc_endpoint_destroy(conn->client_endpoint);
     if (conn->server_endpoint != nullptr) {
-      grpc_endpoint_destroy(exec_ctx, conn->server_endpoint);
+      grpc_endpoint_destroy(conn->server_endpoint);
     }
-    grpc_pollset_set_destroy(exec_ctx, conn->pollset_set);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->client_read_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx,
-                                       &conn->client_deferred_write_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->client_write_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->server_read_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx,
-                                       &conn->server_deferred_write_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &conn->server_write_buffer);
+    grpc_pollset_set_destroy(conn->pollset_set);
+    grpc_slice_buffer_destroy_internal(&conn->client_read_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->client_deferred_write_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->client_write_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->server_read_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->server_deferred_write_buffer);
+    grpc_slice_buffer_destroy_internal(&conn->server_write_buffer);
     grpc_http_parser_destroy(&conn->http_parser);
     grpc_http_request_destroy(&conn->http_request);
     gpr_unref(&conn->proxy->users);
@@ -129,31 +138,59 @@
   }
 }
 
-// Helper function to shut down the proxy connection.
-// Does NOT take ownership of a reference to error.
-static void proxy_connection_failed(grpc_exec_ctx* exec_ctx,
-                                    proxy_connection* conn, bool is_client,
-                                    const char* prefix, grpc_error* error) {
-  const char* msg = grpc_error_string(error);
-  gpr_log(GPR_INFO, "%s: %s", prefix, msg);
+enum failure_type {
+  SETUP_FAILED,  // To be used before we start proxying.
+  CLIENT_READ_FAILED,
+  CLIENT_WRITE_FAILED,
+  SERVER_READ_FAILED,
+  SERVER_WRITE_FAILED,
+};
 
-  grpc_endpoint_shutdown(exec_ctx, conn->client_endpoint,
-                         GRPC_ERROR_REF(error));
-  if (conn->server_endpoint != nullptr) {
-    grpc_endpoint_shutdown(exec_ctx, conn->server_endpoint,
-                           GRPC_ERROR_REF(error));
+// Helper function to shut down the proxy connection.
+static void proxy_connection_failed(proxy_connection* conn,
+                                    failure_type failure, const char* prefix,
+                                    grpc_error* error) {
+  gpr_log(GPR_INFO, "%s: %s", prefix, grpc_error_string(error));
+  // Decide whether we should shut down the client and server.
+  bool shutdown_client = false;
+  bool shutdown_server = false;
+  if (failure == SETUP_FAILED) {
+    shutdown_client = true;
+    shutdown_server = true;
+  } else {
+    if ((failure == CLIENT_READ_FAILED && conn->client_write_failed) ||
+        (failure == CLIENT_WRITE_FAILED && conn->client_read_failed) ||
+        (failure == SERVER_READ_FAILED && !conn->client_is_writing)) {
+      shutdown_client = true;
+    }
+    if ((failure == SERVER_READ_FAILED && conn->server_write_failed) ||
+        (failure == SERVER_WRITE_FAILED && conn->server_read_failed) ||
+        (failure == CLIENT_READ_FAILED && !conn->server_is_writing)) {
+      shutdown_server = true;
+    }
   }
-  proxy_connection_unref(exec_ctx, conn, "conn_failed");
+  // If we decided to shut down either one and have not yet done so, do so.
+  if (shutdown_client && !conn->client_shutdown) {
+    grpc_endpoint_shutdown(conn->client_endpoint, GRPC_ERROR_REF(error));
+    conn->client_shutdown = true;
+  }
+  if (shutdown_server && !conn->server_shutdown &&
+      (conn->server_endpoint != nullptr)) {
+    grpc_endpoint_shutdown(conn->server_endpoint, GRPC_ERROR_REF(error));
+    conn->server_shutdown = true;
+  }
+  // Unref the connection.
+  proxy_connection_unref(conn, "conn_failed");
+  GRPC_ERROR_UNREF(error);
 }
 
 // Callback for writing proxy data to the client.
-static void on_client_write_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_client_write_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   conn->client_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                            "HTTP proxy client write", error);
+    proxy_connection_failed(conn, CLIENT_WRITE_FAILED,
+                            "HTTP proxy client write", GRPC_ERROR_REF(error));
     return;
   }
   // Clear write buffer (the data we just wrote).
@@ -164,23 +201,21 @@
     grpc_slice_buffer_move_into(&conn->client_deferred_write_buffer,
                                 &conn->client_write_buffer);
     conn->client_is_writing = true;
-    grpc_endpoint_write(exec_ctx, conn->client_endpoint,
-                        &conn->client_write_buffer,
+    grpc_endpoint_write(conn->client_endpoint, &conn->client_write_buffer,
                         &conn->on_client_write_done);
   } else {
     // No more writes.  Unref the connection.
-    proxy_connection_unref(exec_ctx, conn, "write_done");
+    proxy_connection_unref(conn, "write_done");
   }
 }
 
 // Callback for writing proxy data to the backend server.
-static void on_server_write_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_server_write_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   conn->server_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, false /* is_client */,
-                            "HTTP proxy server write", error);
+    proxy_connection_failed(conn, SERVER_WRITE_FAILED,
+                            "HTTP proxy server write", GRPC_ERROR_REF(error));
     return;
   }
   // Clear write buffer (the data we just wrote).
@@ -191,23 +226,21 @@
     grpc_slice_buffer_move_into(&conn->server_deferred_write_buffer,
                                 &conn->server_write_buffer);
     conn->server_is_writing = true;
-    grpc_endpoint_write(exec_ctx, conn->server_endpoint,
-                        &conn->server_write_buffer,
+    grpc_endpoint_write(conn->server_endpoint, &conn->server_write_buffer,
                         &conn->on_server_write_done);
   } else {
     // No more writes.  Unref the connection.
-    proxy_connection_unref(exec_ctx, conn, "server_write");
+    proxy_connection_unref(conn, "server_write");
   }
 }
 
 // Callback for reading data from the client, which will be proxied to
 // the backend server.
-static void on_client_read_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void on_client_read_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                            "HTTP proxy client read", error);
+    proxy_connection_failed(conn, CLIENT_READ_FAILED, "HTTP proxy client read",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // If there is already a pending write (i.e., server_write_buffer is
@@ -224,23 +257,21 @@
                                 &conn->server_write_buffer);
     proxy_connection_ref(conn, "client_read");
     conn->server_is_writing = true;
-    grpc_endpoint_write(exec_ctx, conn->server_endpoint,
-                        &conn->server_write_buffer,
+    grpc_endpoint_write(conn->server_endpoint, &conn->server_write_buffer,
                         &conn->on_server_write_done);
   }
   // Read more data.
-  grpc_endpoint_read(exec_ctx, conn->client_endpoint, &conn->client_read_buffer,
+  grpc_endpoint_read(conn->client_endpoint, &conn->client_read_buffer,
                      &conn->on_client_read_done);
 }
 
 // Callback for reading data from the backend server, which will be
 // proxied to the client.
-static void on_server_read_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void on_server_read_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, false /* is_client */,
-                            "HTTP proxy server read", error);
+    proxy_connection_failed(conn, SERVER_READ_FAILED, "HTTP proxy server read",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // If there is already a pending write (i.e., client_write_buffer is
@@ -257,23 +288,21 @@
                                 &conn->client_write_buffer);
     proxy_connection_ref(conn, "server_read");
     conn->client_is_writing = true;
-    grpc_endpoint_write(exec_ctx, conn->client_endpoint,
-                        &conn->client_write_buffer,
+    grpc_endpoint_write(conn->client_endpoint, &conn->client_write_buffer,
                         &conn->on_client_write_done);
   }
   // Read more data.
-  grpc_endpoint_read(exec_ctx, conn->server_endpoint, &conn->server_read_buffer,
+  grpc_endpoint_read(conn->server_endpoint, &conn->server_read_buffer,
                      &conn->on_server_read_done);
 }
 
 // Callback to write the HTTP response for the CONNECT request.
-static void on_write_response_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void on_write_response_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   conn->client_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                            "HTTP proxy write response", error);
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy write response",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // Clear write buffer.
@@ -283,17 +312,16 @@
   // for the other one.
   proxy_connection_ref(conn, "client_read");
   proxy_connection_ref(conn, "server_read");
-  proxy_connection_unref(exec_ctx, conn, "write_response");
-  grpc_endpoint_read(exec_ctx, conn->client_endpoint, &conn->client_read_buffer,
+  proxy_connection_unref(conn, "write_response");
+  grpc_endpoint_read(conn->client_endpoint, &conn->client_read_buffer,
                      &conn->on_client_read_done);
-  grpc_endpoint_read(exec_ctx, conn->server_endpoint, &conn->server_read_buffer,
+  grpc_endpoint_read(conn->server_endpoint, &conn->server_read_buffer,
                      &conn->on_server_read_done);
 }
 
 // Callback to connect to the backend server specified by the HTTP
 // CONNECT request.
-static void on_server_connect_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void on_server_connect_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   if (error != GRPC_ERROR_NONE) {
     // TODO(roth): Technically, in this case, we should handle the error
@@ -301,8 +329,8 @@
     // connection failed.  However, for the purposes of this test code,
     // it's fine to pretend this is a client-side error, which will
     // cause the client connection to be dropped.
-    proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                            "HTTP proxy server connect", error);
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy server connect",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // We've established a connection, so send back a 200 response code to
@@ -312,8 +340,7 @@
       grpc_slice_from_copied_string("HTTP/1.0 200 connected\r\n\r\n");
   grpc_slice_buffer_add(&conn->client_write_buffer, slice);
   conn->client_is_writing = true;
-  grpc_endpoint_write(exec_ctx, conn->client_endpoint,
-                      &conn->client_write_buffer,
+  grpc_endpoint_write(conn->client_endpoint, &conn->client_write_buffer,
                       &conn->on_write_response_done);
 }
 
@@ -322,8 +349,7 @@
  * Basic <base64_encoded_expected_cred>
  * Returns true if it matches, false otherwise
  */
-static bool proxy_auth_header_matches(grpc_exec_ctx* exec_ctx,
-                                      char* proxy_auth_header_val,
+static bool proxy_auth_header_matches(char* proxy_auth_header_val,
                                       char* expected_cred) {
   GPR_ASSERT(proxy_auth_header_val != nullptr);
   GPR_ASSERT(expected_cred != nullptr);
@@ -331,11 +357,10 @@
     return false;
   }
   proxy_auth_header_val += 6;
-  grpc_slice decoded_slice =
-      grpc_base64_decode(exec_ctx, proxy_auth_header_val, 0);
+  grpc_slice decoded_slice = grpc_base64_decode(proxy_auth_header_val, 0);
   const bool header_matches =
       grpc_slice_str_cmp(decoded_slice, expected_cred) == 0;
-  grpc_slice_unref_internal(exec_ctx, decoded_slice);
+  grpc_slice_unref_internal(decoded_slice);
   return header_matches;
 }
 
@@ -345,14 +370,13 @@
 // the client indicating that the request failed.  However, for the purposes
 // of this test code, it's fine to pretend this is a client-side error,
 // which will cause the client connection to be dropped.
-static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_read_request_done(void* arg, grpc_error* error) {
   proxy_connection* conn = (proxy_connection*)arg;
   gpr_log(GPR_DEBUG, "on_read_request_done: %p %s", conn,
           grpc_error_string(error));
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                            "HTTP proxy read request", error);
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy read request",
+                            GRPC_ERROR_REF(error));
     return;
   }
   // Read request and feed it to the parser.
@@ -361,8 +385,8 @@
       error = grpc_http_parser_parse(
           &conn->http_parser, conn->client_read_buffer.slices[i], nullptr);
       if (error != GRPC_ERROR_NONE) {
-        proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                                "HTTP proxy request parse", error);
+        proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy request parse",
+                                GRPC_ERROR_REF(error));
         GRPC_ERROR_UNREF(error);
         return;
       }
@@ -371,8 +395,8 @@
   grpc_slice_buffer_reset_and_unref(&conn->client_read_buffer);
   // If we're not done reading the request, read more data.
   if (conn->http_parser.state != GRPC_HTTP_BODY) {
-    grpc_endpoint_read(exec_ctx, conn->client_endpoint,
-                       &conn->client_read_buffer, &conn->on_read_request_done);
+    grpc_endpoint_read(conn->client_endpoint, &conn->client_read_buffer,
+                       &conn->on_read_request_done);
     return;
   }
   // Make sure we got a CONNECT request.
@@ -382,8 +406,8 @@
                  conn->http_request.method);
     error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
     gpr_free(msg);
-    proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                            "HTTP proxy read request", error);
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy read request",
+                            GRPC_ERROR_REF(error));
     GRPC_ERROR_UNREF(error);
     return;
   }
@@ -395,16 +419,15 @@
     for (size_t i = 0; i < conn->http_request.hdr_count; i++) {
       if (strcmp(conn->http_request.hdrs[i].key, "Proxy-Authorization") == 0) {
         client_authenticated = proxy_auth_header_matches(
-            exec_ctx, conn->http_request.hdrs[i].value,
-            proxy_auth_arg->value.string);
+            conn->http_request.hdrs[i].value, proxy_auth_arg->value.string);
         break;
       }
     }
     if (!client_authenticated) {
       const char* msg = "HTTP Connect could not verify authentication";
       error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(msg);
-      proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                              "HTTP proxy read request", error);
+      proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy read request",
+                              GRPC_ERROR_REF(error));
       GRPC_ERROR_UNREF(error);
       return;
     }
@@ -414,8 +437,8 @@
   error = grpc_blocking_resolve_address(conn->http_request.path, "80",
                                         &resolved_addresses);
   if (error != GRPC_ERROR_NONE) {
-    proxy_connection_failed(exec_ctx, conn, true /* is_client */,
-                            "HTTP proxy DNS lookup", error);
+    proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy DNS lookup",
+                            GRPC_ERROR_REF(error));
     GRPC_ERROR_UNREF(error);
     return;
   }
@@ -423,15 +446,15 @@
   // Connect to requested address.
   // The connection callback inherits our reference to conn.
   const grpc_millis deadline =
-      grpc_exec_ctx_now(exec_ctx) + 10 * GPR_MS_PER_SEC;
-  grpc_tcp_client_connect(exec_ctx, &conn->on_server_connect_done,
-                          &conn->server_endpoint, conn->pollset_set, nullptr,
+      grpc_core::ExecCtx::Get()->Now() + 10 * GPR_MS_PER_SEC;
+  grpc_tcp_client_connect(&conn->on_server_connect_done, &conn->server_endpoint,
+                          conn->pollset_set, nullptr,
                           &resolved_addresses->addrs[0], deadline);
   grpc_resolved_addresses_destroy(resolved_addresses);
 }
 
-static void on_accept(grpc_exec_ctx* exec_ctx, void* arg,
-                      grpc_endpoint* endpoint, grpc_pollset* accepting_pollset,
+static void on_accept(void* arg, grpc_endpoint* endpoint,
+                      grpc_pollset* accepting_pollset,
                       grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
   grpc_end2end_http_proxy* proxy = (grpc_end2end_http_proxy*)arg;
@@ -442,8 +465,8 @@
   conn->proxy = proxy;
   gpr_ref_init(&conn->refcount, 1);
   conn->pollset_set = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(exec_ctx, conn->pollset_set, proxy->pollset);
-  grpc_endpoint_add_to_pollset_set(exec_ctx, endpoint, conn->pollset_set);
+  grpc_pollset_set_add_pollset(conn->pollset_set, proxy->pollset);
+  grpc_endpoint_add_to_pollset_set(endpoint, conn->pollset_set);
   GRPC_CLOSURE_INIT(&conn->on_read_request_done, on_read_request_done, conn,
                     grpc_combiner_scheduler(conn->proxy->combiner));
   GRPC_CLOSURE_INIT(&conn->on_server_connect_done, on_server_connect_done, conn,
@@ -468,7 +491,7 @@
   grpc_slice_buffer_init(&conn->server_write_buffer);
   grpc_http_parser_init(&conn->http_parser, GRPC_HTTP_REQUEST,
                         &conn->http_request);
-  grpc_endpoint_read(exec_ctx, conn->client_endpoint, &conn->client_read_buffer,
+  grpc_endpoint_read(conn->client_endpoint, &conn->client_read_buffer,
                      &conn->on_read_request_done);
 }
 
@@ -478,24 +501,23 @@
 
 static void thread_main(void* arg) {
   grpc_end2end_http_proxy* proxy = (grpc_end2end_http_proxy*)arg;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   do {
     gpr_ref(&proxy->users);
     grpc_pollset_worker* worker = nullptr;
     gpr_mu_lock(proxy->mu);
     GRPC_LOG_IF_ERROR(
         "grpc_pollset_work",
-        grpc_pollset_work(&exec_ctx, proxy->pollset, &worker,
-                          grpc_exec_ctx_now(&exec_ctx) + GPR_MS_PER_SEC));
+        grpc_pollset_work(proxy->pollset, &worker,
+                          grpc_core::ExecCtx::Get()->Now() + GPR_MS_PER_SEC));
     gpr_mu_unlock(proxy->mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   } while (!gpr_unref(&proxy->users));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 grpc_end2end_http_proxy* grpc_end2end_http_proxy_create(
     grpc_channel_args* args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_end2end_http_proxy* proxy =
       (grpc_end2end_http_proxy*)gpr_malloc(sizeof(*proxy));
   memset(proxy, 0, sizeof(*proxy));
@@ -507,8 +529,8 @@
   gpr_log(GPR_INFO, "Proxy address: %s", proxy->proxy_name);
   // Create TCP server.
   proxy->channel_args = grpc_channel_args_copy(args);
-  grpc_error* error = grpc_tcp_server_create(
-      &exec_ctx, nullptr, proxy->channel_args, &proxy->server);
+  grpc_error* error =
+      grpc_tcp_server_create(nullptr, proxy->channel_args, &proxy->server);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   // Bind to port.
   grpc_resolved_address resolved_addr;
@@ -523,37 +545,35 @@
   // Start server.
   proxy->pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
   grpc_pollset_init(proxy->pollset, &proxy->mu);
-  grpc_tcp_server_start(&exec_ctx, proxy->server, &proxy->pollset, 1, on_accept,
-                        proxy);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_start(proxy->server, &proxy->pollset, 1, on_accept, proxy);
+
   // Start proxy thread.
   gpr_thd_options opt = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&opt);
-  GPR_ASSERT(gpr_thd_new(&proxy->thd, thread_main, proxy, &opt));
+  GPR_ASSERT(
+      gpr_thd_new(&proxy->thd, "grpc_http_proxy", thread_main, proxy, &opt));
   return proxy;
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void destroy_pollset(void* arg, grpc_error* error) {
   grpc_pollset* pollset = (grpc_pollset*)arg;
-  grpc_pollset_destroy(exec_ctx, pollset);
+  grpc_pollset_destroy(pollset);
   gpr_free(pollset);
 }
 
 void grpc_end2end_http_proxy_destroy(grpc_end2end_http_proxy* proxy) {
   gpr_unref(&proxy->users);  // Signal proxy thread to shutdown.
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_thd_join(proxy->thd);
-  grpc_tcp_server_shutdown_listeners(&exec_ctx, proxy->server);
-  grpc_tcp_server_unref(&exec_ctx, proxy->server);
+  grpc_tcp_server_shutdown_listeners(proxy->server);
+  grpc_tcp_server_unref(proxy->server);
   gpr_free(proxy->proxy_name);
-  grpc_channel_args_destroy(&exec_ctx, proxy->channel_args);
-  grpc_pollset_shutdown(&exec_ctx, proxy->pollset,
+  grpc_channel_args_destroy(proxy->channel_args);
+  grpc_pollset_shutdown(proxy->pollset,
                         GRPC_CLOSURE_CREATE(destroy_pollset, proxy->pollset,
                                             grpc_schedule_on_exec_ctx));
-  GRPC_COMBINER_UNREF(&exec_ctx, proxy->combiner, "test");
+  GRPC_COMBINER_UNREF(proxy->combiner, "test");
   gpr_free(proxy);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 const char* grpc_end2end_http_proxy_get_proxy_name(
diff --git a/test/core/end2end/fixtures/proxy.cc b/test/core/end2end/fixtures/proxy.cc
index 2fab62b..b1698c8 100644
--- a/test/core/end2end/fixtures/proxy.cc
+++ b/test/core/end2end/fixtures/proxy.cc
@@ -98,7 +98,8 @@
 
   grpc_call_details_init(&proxy->new_call_details);
   gpr_thd_options_set_joinable(&opt);
-  GPR_ASSERT(gpr_thd_new(&proxy->thd, thread_main, proxy, &opt));
+  GPR_ASSERT(
+      gpr_thd_new(&proxy->thd, "grpc_end2end_proxy", thread_main, proxy, &opt));
 
   request_call(proxy);
 
diff --git a/test/core/end2end/fuzzers/api_fuzzer.cc b/test/core/end2end/fuzzers/api_fuzzer.cc
index 0b49b89..967a6d5 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.cc
+++ b/test/core/end2end/fuzzers/api_fuzzer.cc
@@ -376,8 +376,7 @@
   grpc_lb_addresses** lb_addrs;
 } addr_req;
 
-static void finish_resolve(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void finish_resolve(void* arg, grpc_error* error) {
   addr_req* r = static_cast<addr_req*>(arg);
 
   if (error == GRPC_ERROR_NONE && 0 == strcmp(r->addr, "server")) {
@@ -395,9 +394,9 @@
                                     nullptr);
       *r->lb_addrs = lb_addrs;
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, r->on_done, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(r->on_done, GRPC_ERROR_NONE);
   } else {
-    GRPC_CLOSURE_SCHED(exec_ctx, r->on_done,
+    GRPC_CLOSURE_SCHED(r->on_done,
                        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                            "Resolution failed", &error, 1));
   }
@@ -406,8 +405,7 @@
   gpr_free(r);
 }
 
-void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
-                        const char* default_port,
+void my_resolve_address(const char* addr, const char* default_port,
                         grpc_pollset_set* interested_parties,
                         grpc_closure* on_done,
                         grpc_resolved_addresses** addresses) {
@@ -417,22 +415,24 @@
   r->addrs = addresses;
   r->lb_addrs = nullptr;
   grpc_timer_init(
-      exec_ctx, &r->timer, GPR_MS_PER_SEC + grpc_exec_ctx_now(exec_ctx),
+      &r->timer, GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now(),
       GRPC_CLOSURE_CREATE(finish_resolve, r, grpc_schedule_on_exec_ctx));
 }
 
-grpc_ares_request* my_dns_lookup_ares(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* addr,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** lb_addrs, bool check_grpclb,
-    char** service_config_json) {
+grpc_ares_request* my_dns_lookup_ares(const char* dns_server, const char* addr,
+                                      const char* default_port,
+                                      grpc_pollset_set* interested_parties,
+                                      grpc_closure* on_done,
+                                      grpc_lb_addresses** lb_addrs,
+                                      bool check_grpclb,
+                                      char** service_config_json) {
   addr_req* r = static_cast<addr_req*>(gpr_malloc(sizeof(*r)));
   r->addr = gpr_strdup(addr);
   r->on_done = on_done;
   r->addrs = nullptr;
   r->lb_addrs = lb_addrs;
   grpc_timer_init(
-      exec_ctx, &r->timer, GPR_MS_PER_SEC + grpc_exec_ctx_now(exec_ctx),
+      &r->timer, GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now(),
       GRPC_CLOSURE_CREATE(finish_resolve, r, grpc_schedule_on_exec_ctx));
   return nullptr;
 }
@@ -442,12 +442,12 @@
 
 // defined in tcp_client_posix.c
 extern void (*grpc_tcp_client_connect_impl)(
-    grpc_exec_ctx* exec_ctx, grpc_closure* closure, grpc_endpoint** ep,
+    grpc_closure* closure, grpc_endpoint** ep,
     grpc_pollset_set* interested_parties, const grpc_channel_args* channel_args,
     const grpc_resolved_address* addr, grpc_millis deadline);
 
-static void sched_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                          grpc_endpoint** ep, gpr_timespec deadline);
+static void sched_connect(grpc_closure* closure, grpc_endpoint** ep,
+                          gpr_timespec deadline);
 
 typedef struct {
   grpc_timer timer;
@@ -456,11 +456,11 @@
   gpr_timespec deadline;
 } future_connect;
 
-static void do_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void do_connect(void* arg, grpc_error* error) {
   future_connect* fc = static_cast<future_connect*>(arg);
   if (error != GRPC_ERROR_NONE) {
     *fc->ep = nullptr;
-    GRPC_CLOSURE_SCHED(exec_ctx, fc->closure, GRPC_ERROR_REF(error));
+    GRPC_CLOSURE_SCHED(fc->closure, GRPC_ERROR_REF(error));
   } else if (g_server != nullptr) {
     grpc_endpoint* client;
     grpc_endpoint* server;
@@ -468,25 +468,23 @@
     *fc->ep = client;
 
     grpc_transport* transport =
-        grpc_create_chttp2_transport(exec_ctx, nullptr, server, 0);
-    grpc_server_setup_transport(exec_ctx, g_server, transport, nullptr,
-                                nullptr);
-    grpc_chttp2_transport_start_reading(exec_ctx, transport, nullptr);
+        grpc_create_chttp2_transport(nullptr, server, false);
+    grpc_server_setup_transport(g_server, transport, nullptr, nullptr);
+    grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
-    GRPC_CLOSURE_SCHED(exec_ctx, fc->closure, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(fc->closure, GRPC_ERROR_NONE);
   } else {
-    sched_connect(exec_ctx, fc->closure, fc->ep, fc->deadline);
+    sched_connect(fc->closure, fc->ep, fc->deadline);
   }
   gpr_free(fc);
 }
 
-static void sched_connect(grpc_exec_ctx* exec_ctx, grpc_closure* closure,
-                          grpc_endpoint** ep, gpr_timespec deadline) {
+static void sched_connect(grpc_closure* closure, grpc_endpoint** ep,
+                          gpr_timespec deadline) {
   if (gpr_time_cmp(deadline, gpr_now(deadline.clock_type)) < 0) {
     *ep = nullptr;
-    GRPC_CLOSURE_SCHED(
-        exec_ctx, closure,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connect deadline exceeded"));
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                    "Connect deadline exceeded"));
     return;
   }
 
@@ -495,17 +493,16 @@
   fc->ep = ep;
   fc->deadline = deadline;
   grpc_timer_init(
-      exec_ctx, &fc->timer, GPR_MS_PER_SEC + grpc_exec_ctx_now(exec_ctx),
+      &fc->timer, GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now(),
       GRPC_CLOSURE_CREATE(do_connect, fc, grpc_schedule_on_exec_ctx));
 }
 
-static void my_tcp_client_connect(grpc_exec_ctx* exec_ctx,
-                                  grpc_closure* closure, grpc_endpoint** ep,
+static void my_tcp_client_connect(grpc_closure* closure, grpc_endpoint** ep,
                                   grpc_pollset_set* interested_parties,
                                   const grpc_channel_args* channel_args,
                                   const grpc_resolved_address* addr,
                                   grpc_millis deadline) {
-  sched_connect(exec_ctx, closure, ep,
+  sched_connect(closure, ep,
                 grpc_millis_to_timespec(deadline, GPR_CLOCK_MONOTONIC));
 }
 
@@ -751,9 +748,8 @@
   grpc_init();
   grpc_timer_manager_set_threading(false);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_executor_set_threading(&exec_ctx, false);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(false);
   }
   grpc_resolve_address = my_resolve_address;
   grpc_dns_lookup_ares = my_dns_lookup_ares;
@@ -846,9 +842,8 @@
           g_channel = grpc_insecure_channel_create(target_uri, args, nullptr);
           GPR_ASSERT(g_channel != nullptr);
           {
-            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-            grpc_channel_args_destroy(&exec_ctx, args);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_core::ExecCtx exec_ctx;
+            grpc_channel_args_destroy(args);
           }
           gpr_free(target_uri);
           gpr_free(target);
@@ -874,9 +869,8 @@
           g_server = grpc_server_create(args, nullptr);
           GPR_ASSERT(g_server != nullptr);
           {
-            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-            grpc_channel_args_destroy(&exec_ctx, args);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_core::ExecCtx exec_ctx;
+            grpc_channel_args_destroy(args);
           }
           grpc_server_register_completion_queue(g_server, cq, nullptr);
           grpc_server_start(g_server);
@@ -1205,9 +1199,8 @@
               grpc_secure_channel_create(creds, target_uri, args, nullptr);
           GPR_ASSERT(g_channel != nullptr);
           {
-            grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-            grpc_channel_args_destroy(&exec_ctx, args);
-            grpc_exec_ctx_finish(&exec_ctx);
+            grpc_core::ExecCtx exec_ctx;
+            grpc_channel_args_destroy(args);
           }
           gpr_free(target_uri);
           gpr_free(target);
diff --git a/test/core/end2end/fuzzers/client_fuzzer.cc b/test/core/end2end/fuzzers/client_fuzzer.cc
index ebc8c27..c17d581 100644
--- a/test/core/end2end/fuzzers/client_fuzzer.cc
+++ b/test/core/end2end/fuzzers/client_fuzzer.cc
@@ -43,112 +43,114 @@
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_executor_set_threading(&exec_ctx, false);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(false);
 
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("client_fuzzer");
-  grpc_endpoint* mock_endpoint =
-      grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("client_fuzzer");
+    grpc_endpoint* mock_endpoint =
+        grpc_mock_endpoint_create(discard_write, resource_quota);
+    grpc_resource_quota_unref_internal(resource_quota);
 
-  grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
-  grpc_transport* transport =
-      grpc_create_chttp2_transport(&exec_ctx, nullptr, mock_endpoint, 1);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
+    grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
+    grpc_transport* transport =
+        grpc_create_chttp2_transport(nullptr, mock_endpoint, true);
+    grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
-  grpc_channel* channel = grpc_channel_create(
-      &exec_ctx, "test-target", nullptr, GRPC_CLIENT_DIRECT_CHANNEL, transport);
-  grpc_slice host = grpc_slice_from_static_string("localhost");
-  grpc_call* call = grpc_channel_create_call(
-      channel, nullptr, 0, cq, grpc_slice_from_static_string("/foo"), &host,
-      gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
+    grpc_channel* channel = grpc_channel_create(
+        "test-target", nullptr, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+    grpc_slice host = grpc_slice_from_static_string("localhost");
+    grpc_call* call = grpc_channel_create_call(
+        channel, nullptr, 0, cq, grpc_slice_from_static_string("/foo"), &host,
+        gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
 
-  grpc_metadata_array initial_metadata_recv;
-  grpc_metadata_array_init(&initial_metadata_recv);
-  grpc_byte_buffer* response_payload_recv = nullptr;
-  grpc_metadata_array trailing_metadata_recv;
-  grpc_metadata_array_init(&trailing_metadata_recv);
-  grpc_status_code status;
-  grpc_slice details = grpc_empty_slice();
+    grpc_metadata_array initial_metadata_recv;
+    grpc_metadata_array_init(&initial_metadata_recv);
+    grpc_byte_buffer* response_payload_recv = nullptr;
+    grpc_metadata_array trailing_metadata_recv;
+    grpc_metadata_array_init(&trailing_metadata_recv);
+    grpc_status_code status;
+    grpc_slice details = grpc_empty_slice();
 
-  grpc_op ops[6];
-  memset(ops, 0, sizeof(ops));
-  grpc_op* op = ops;
-  op->op = GRPC_OP_SEND_INITIAL_METADATA;
-  op->data.send_initial_metadata.count = 0;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  op->op = GRPC_OP_RECV_INITIAL_METADATA;
-  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  op->op = GRPC_OP_RECV_MESSAGE;
-  op->data.recv_message.recv_message = &response_payload_recv;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
-  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
-  op->data.recv_status_on_client.status = &status;
-  op->data.recv_status_on_client.status_details = &details;
-  op->flags = 0;
-  op->reserved = nullptr;
-  op++;
-  grpc_call_error error =
-      grpc_call_start_batch(call, ops, (size_t)(op - ops), tag(1), nullptr);
-  int requested_calls = 1;
-  GPR_ASSERT(GRPC_CALL_OK == error);
+    grpc_op ops[6];
+    memset(ops, 0, sizeof(ops));
+    grpc_op* op = ops;
+    op->op = GRPC_OP_SEND_INITIAL_METADATA;
+    op->data.send_initial_metadata.count = 0;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    op->op = GRPC_OP_RECV_INITIAL_METADATA;
+    op->data.recv_initial_metadata.recv_initial_metadata =
+        &initial_metadata_recv;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->data.recv_message.recv_message = &response_payload_recv;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+    op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+    op->data.recv_status_on_client.status = &status;
+    op->data.recv_status_on_client.status_details = &details;
+    op->flags = 0;
+    op->reserved = nullptr;
+    op++;
+    grpc_call_error error =
+        grpc_call_start_batch(call, ops, (size_t)(op - ops), tag(1), nullptr);
+    int requested_calls = 1;
+    GPR_ASSERT(GRPC_CALL_OK == error);
 
-  grpc_mock_endpoint_put_read(
-      &exec_ctx, mock_endpoint,
-      grpc_slice_from_copied_buffer((const char*)data, size));
+    grpc_mock_endpoint_put_read(
+        mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
 
-  grpc_event ev;
-  while (1) {
-    grpc_exec_ctx_flush(&exec_ctx);
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    switch (ev.type) {
-      case GRPC_QUEUE_TIMEOUT:
-        goto done;
-      case GRPC_QUEUE_SHUTDOWN:
-        break;
-      case GRPC_OP_COMPLETE:
-        requested_calls--;
-        break;
+    grpc_event ev;
+    while (1) {
+      grpc_core::ExecCtx::Get()->Flush();
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      switch (ev.type) {
+        case GRPC_QUEUE_TIMEOUT:
+          goto done;
+        case GRPC_QUEUE_SHUTDOWN:
+          break;
+        case GRPC_OP_COMPLETE:
+          requested_calls--;
+          break;
+      }
     }
-  }
 
-done:
-  if (requested_calls) {
-    grpc_call_cancel(call, nullptr);
-  }
-  for (int i = 0; i < requested_calls; i++) {
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
-  }
-  grpc_completion_queue_shutdown(cq);
-  for (int i = 0; i < requested_calls; i++) {
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
-  }
-  grpc_call_unref(call);
-  grpc_completion_queue_destroy(cq);
-  grpc_metadata_array_destroy(&initial_metadata_recv);
-  grpc_metadata_array_destroy(&trailing_metadata_recv);
-  grpc_slice_unref(details);
-  grpc_channel_destroy(channel);
-  if (response_payload_recv != nullptr) {
-    grpc_byte_buffer_destroy(response_payload_recv);
+  done:
+    if (requested_calls) {
+      grpc_call_cancel(call, nullptr);
+    }
+    for (int i = 0; i < requested_calls; i++) {
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+    }
+    grpc_completion_queue_shutdown(cq);
+    for (int i = 0; i < requested_calls; i++) {
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
+    }
+    grpc_call_unref(call);
+    grpc_completion_queue_destroy(cq);
+    grpc_metadata_array_destroy(&initial_metadata_recv);
+    grpc_metadata_array_destroy(&trailing_metadata_recv);
+    grpc_slice_unref(details);
+    grpc_channel_destroy(channel);
+    if (response_payload_recv != nullptr) {
+      grpc_byte_buffer_destroy(response_payload_recv);
+    }
   }
   grpc_shutdown();
   if (leak_check) {
diff --git a/test/core/end2end/fuzzers/server_fuzzer.cc b/test/core/end2end/fuzzers/server_fuzzer.cc
index fb6477b..61c55e0 100644
--- a/test/core/end2end/fuzzers/server_fuzzer.cc
+++ b/test/core/end2end/fuzzers/server_fuzzer.cc
@@ -41,81 +41,82 @@
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_executor_set_threading(&exec_ctx, false);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_executor_set_threading(false);
 
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("server_fuzzer");
-  grpc_endpoint* mock_endpoint =
-      grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_mock_endpoint_put_read(
-      &exec_ctx, mock_endpoint,
-      grpc_slice_from_copied_buffer((const char*)data, size));
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("server_fuzzer");
+    grpc_endpoint* mock_endpoint =
+        grpc_mock_endpoint_create(discard_write, resource_quota);
+    grpc_resource_quota_unref_internal(resource_quota);
+    grpc_mock_endpoint_put_read(
+        mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
 
-  grpc_server* server = grpc_server_create(nullptr, nullptr);
-  grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
-  grpc_server_register_completion_queue(server, cq, nullptr);
-  // TODO(ctiller): add registered methods (one for POST, one for PUT)
-  // void *registered_method =
-  //    grpc_server_register_method(server, "/reg", NULL, 0);
-  grpc_server_start(server);
-  grpc_transport* transport =
-      grpc_create_chttp2_transport(&exec_ctx, nullptr, mock_endpoint, 0);
-  grpc_server_setup_transport(&exec_ctx, server, transport, nullptr, nullptr);
-  grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
+    grpc_server* server = grpc_server_create(nullptr, nullptr);
+    grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
+    grpc_server_register_completion_queue(server, cq, nullptr);
+    // TODO(ctiller): add registered methods (one for POST, one for PUT)
+    // void *registered_method =
+    //    grpc_server_register_method(server, "/reg", NULL, 0);
+    grpc_server_start(server);
+    grpc_transport* transport =
+        grpc_create_chttp2_transport(nullptr, mock_endpoint, false);
+    grpc_server_setup_transport(server, transport, nullptr, nullptr);
+    grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
-  grpc_call* call1 = nullptr;
-  grpc_call_details call_details1;
-  grpc_metadata_array request_metadata1;
-  grpc_call_details_init(&call_details1);
-  grpc_metadata_array_init(&request_metadata1);
-  int requested_calls = 0;
+    grpc_call* call1 = nullptr;
+    grpc_call_details call_details1;
+    grpc_metadata_array request_metadata1;
+    grpc_call_details_init(&call_details1);
+    grpc_metadata_array_init(&request_metadata1);
+    int requested_calls = 0;
 
-  GPR_ASSERT(GRPC_CALL_OK ==
-             grpc_server_request_call(server, &call1, &call_details1,
-                                      &request_metadata1, cq, cq, tag(1)));
-  requested_calls++;
+    GPR_ASSERT(GRPC_CALL_OK ==
+               grpc_server_request_call(server, &call1, &call_details1,
+                                        &request_metadata1, cq, cq, tag(1)));
+    requested_calls++;
 
-  grpc_event ev;
-  while (1) {
-    grpc_exec_ctx_flush(&exec_ctx);
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    switch (ev.type) {
-      case GRPC_QUEUE_TIMEOUT:
-        goto done;
-      case GRPC_QUEUE_SHUTDOWN:
-        break;
-      case GRPC_OP_COMPLETE:
-        switch (detag(ev.tag)) {
-          case 1:
-            requested_calls--;
-            // TODO(ctiller): keep reading that call!
-            break;
-        }
+    grpc_event ev;
+    while (1) {
+      grpc_core::ExecCtx::Get()->Flush();
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      switch (ev.type) {
+        case GRPC_QUEUE_TIMEOUT:
+          goto done;
+        case GRPC_QUEUE_SHUTDOWN:
+          break;
+        case GRPC_OP_COMPLETE:
+          switch (detag(ev.tag)) {
+            case 1:
+              requested_calls--;
+              // TODO(ctiller): keep reading that call!
+              break;
+          }
+      }
     }
-  }
 
-done:
-  if (call1 != nullptr) grpc_call_unref(call1);
-  grpc_call_details_destroy(&call_details1);
-  grpc_metadata_array_destroy(&request_metadata1);
-  grpc_server_shutdown_and_notify(server, cq, tag(0xdead));
-  grpc_server_cancel_all_calls(server);
-  for (int i = 0; i <= requested_calls; i++) {
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+  done:
+    if (call1 != nullptr) grpc_call_unref(call1);
+    grpc_call_details_destroy(&call_details1);
+    grpc_metadata_array_destroy(&request_metadata1);
+    grpc_server_shutdown_and_notify(server, cq, tag(0xdead));
+    grpc_server_cancel_all_calls(server);
+    for (int i = 0; i <= requested_calls; i++) {
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+    }
+    grpc_completion_queue_shutdown(cq);
+    for (int i = 0; i <= requested_calls; i++) {
+      ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
+                                      nullptr);
+      GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
+    }
+    grpc_server_destroy(server);
+    grpc_completion_queue_destroy(cq);
   }
-  grpc_completion_queue_shutdown(cq);
-  for (int i = 0; i <= requested_calls; i++) {
-    ev = grpc_completion_queue_next(cq, gpr_inf_past(GPR_CLOCK_REALTIME),
-                                    nullptr);
-    GPR_ASSERT(ev.type == GRPC_QUEUE_SHUTDOWN);
-  }
-  grpc_server_destroy(server);
-  grpc_completion_queue_destroy(cq);
   grpc_shutdown();
   if (leak_check) {
     counters = grpc_memory_counters_snapshot();
diff --git a/test/core/end2end/goaway_server_test.cc b/test/core/end2end/goaway_server_test.cc
index 2d0db96..94cfbdd 100644
--- a/test/core/end2end/goaway_server_test.cc
+++ b/test/core/end2end/goaway_server_test.cc
@@ -39,16 +39,15 @@
 
 static gpr_mu g_mu;
 static int g_resolve_port = -1;
-static void (*iomgr_resolve_address)(grpc_exec_ctx* exec_ctx, const char* addr,
-                                     const char* default_port,
+static void (*iomgr_resolve_address)(const char* addr, const char* default_port,
                                      grpc_pollset_set* interested_parties,
                                      grpc_closure* on_done,
                                      grpc_resolved_addresses** addresses);
 
 static grpc_ares_request* (*iomgr_dns_lookup_ares)(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* addr,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** addresses, bool check_grpclb,
+    const char* dns_server, const char* addr, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** addresses, bool check_grpclb,
     char** service_config_json);
 
 static void set_resolve_port(int port) {
@@ -57,14 +56,13 @@
   gpr_mu_unlock(&g_mu);
 }
 
-static void my_resolve_address(grpc_exec_ctx* exec_ctx, const char* addr,
-                               const char* default_port,
+static void my_resolve_address(const char* addr, const char* default_port,
                                grpc_pollset_set* interested_parties,
                                grpc_closure* on_done,
                                grpc_resolved_addresses** addrs) {
   if (0 != strcmp(addr, "test")) {
-    iomgr_resolve_address(exec_ctx, addr, default_port, interested_parties,
-                          on_done, addrs);
+    iomgr_resolve_address(addr, default_port, interested_parties, on_done,
+                          addrs);
     return;
   }
 
@@ -86,16 +84,16 @@
     (*addrs)->addrs[0].len = sizeof(*sa);
     gpr_mu_unlock(&g_mu);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
 }
 
 static grpc_ares_request* my_dns_lookup_ares(
-    grpc_exec_ctx* exec_ctx, const char* dns_server, const char* addr,
-    const char* default_port, grpc_pollset_set* interested_parties,
-    grpc_closure* on_done, grpc_lb_addresses** lb_addrs, bool check_grpclb,
+    const char* dns_server, const char* addr, const char* default_port,
+    grpc_pollset_set* interested_parties, grpc_closure* on_done,
+    grpc_lb_addresses** lb_addrs, bool check_grpclb,
     char** service_config_json) {
   if (0 != strcmp(addr, "test")) {
-    return iomgr_dns_lookup_ares(exec_ctx, dns_server, addr, default_port,
+    return iomgr_dns_lookup_ares(dns_server, addr, default_port,
                                  interested_parties, on_done, lb_addrs,
                                  check_grpclb, service_config_json);
   }
@@ -117,7 +115,7 @@
     gpr_free(sa);
     gpr_mu_unlock(&g_mu);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
+  GRPC_CLOSURE_SCHED(on_done, error);
   return nullptr;
 }
 
diff --git a/test/core/end2end/h2_ssl_cert_test.cc b/test/core/end2end/h2_ssl_cert_test.cc
index 9a98c07..d50d1f4 100644
--- a/test/core/end2end/h2_ssl_cert_test.cc
+++ b/test/core/end2end/h2_ssl_cert_test.cc
@@ -181,9 +181,8 @@
         grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);  \
     chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);      \
     {                                                                        \
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;                           \
-      grpc_channel_args_destroy(&exec_ctx, new_client_args);                 \
-      grpc_exec_ctx_finish(&exec_ctx);                                       \
+      grpc_core::ExecCtx exec_ctx;                                           \
+      grpc_channel_args_destroy(new_client_args);                            \
     }                                                                        \
   }
 
diff --git a/test/core/end2end/tests/cancel_after_accept.cc b/test/core/end2end/tests/cancel_after_accept.cc
index 83439d7..f59caf7 100644
--- a/test/core/end2end/tests/cancel_after_accept.cc
+++ b/test/core/end2end/tests/cancel_after_accept.cc
@@ -245,9 +245,8 @@
   grpc_call_unref(s);
 
   if (args != nullptr) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(args);
   }
 
   cq_verifier_destroy(cqv);
diff --git a/test/core/end2end/tests/cancel_after_round_trip.cc b/test/core/end2end/tests/cancel_after_round_trip.cc
index ddcec67..b10b939 100644
--- a/test/core/end2end/tests/cancel_after_round_trip.cc
+++ b/test/core/end2end/tests/cancel_after_round_trip.cc
@@ -278,9 +278,8 @@
   grpc_call_unref(s);
 
   if (args != nullptr) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(args);
   }
 
   cq_verifier_destroy(cqv);
diff --git a/test/core/end2end/tests/compressed_payload.cc b/test/core/end2end/tests/compressed_payload.cc
index a8ea0ff..944edc7 100644
--- a/test/core/end2end/tests/compressed_payload.cc
+++ b/test/core/end2end/tests/compressed_payload.cc
@@ -129,10 +129,9 @@
   server_args =
       grpc_channel_args_set_compression_algorithm(nullptr, GRPC_COMPRESS_NONE);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     server_args = grpc_channel_args_compression_algorithm_set_state(
-        &exec_ctx, &server_args, algorithm_to_disable, false);
-    grpc_exec_ctx_finish(&exec_ctx);
+        &server_args, algorithm_to_disable, false);
   }
 
   f = begin_test(config, test_name, client_args, server_args);
@@ -257,10 +256,9 @@
   grpc_byte_buffer_destroy(request_payload_recv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
@@ -539,10 +537,9 @@
   cq_verifier_destroy(cqv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
diff --git a/test/core/end2end/tests/connectivity.cc b/test/core/end2end/tests/connectivity.cc
index 2ea4ca8..da65080 100644
--- a/test/core/end2end/tests/connectivity.cc
+++ b/test/core/end2end/tests/connectivity.cc
@@ -68,7 +68,8 @@
   ce.cq = f.cq;
   gpr_event_init(&ce.started);
   gpr_thd_options_set_joinable(&thdopt);
-  GPR_ASSERT(gpr_thd_new(&thdid, child_thread, &ce, &thdopt));
+  GPR_ASSERT(
+      gpr_thd_new(&thdid, "grpc_connectivity", child_thread, &ce, &thdopt));
 
   gpr_event_wait(&ce.started, gpr_inf_future(GPR_CLOCK_MONOTONIC));
 
diff --git a/test/core/end2end/tests/filter_call_init_fails.cc b/test/core/end2end/tests/filter_call_init_fails.cc
index 6eed68a..8f46f0b 100644
--- a/test/core/end2end/tests/filter_call_init_fails.cc
+++ b/test/core/end2end/tests/filter_call_init_fails.cc
@@ -399,26 +399,23 @@
  * Test filter - always fails to initialize a call
  */
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   return grpc_error_set_int(
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("access denied"),
       GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_PERMISSION_DENIED);
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 static const grpc_channel_filter test_filter = {
     grpc_call_next_op,
@@ -437,8 +434,7 @@
  * Registration
  */
 
-static bool maybe_add_server_channel_filter(grpc_exec_ctx* exec_ctx,
-                                            grpc_channel_stack_builder* builder,
+static bool maybe_add_server_channel_filter(grpc_channel_stack_builder* builder,
                                             void* arg) {
   if (g_enable_server_channel_filter) {
     // Want to add the filter as close to the end as possible, to make
@@ -457,8 +453,7 @@
   }
 }
 
-static bool maybe_add_client_channel_filter(grpc_exec_ctx* exec_ctx,
-                                            grpc_channel_stack_builder* builder,
+static bool maybe_add_client_channel_filter(grpc_channel_stack_builder* builder,
                                             void* arg) {
   if (g_enable_client_channel_filter) {
     // Want to add the filter as close to the end as possible, to make
@@ -478,7 +473,7 @@
 }
 
 static bool maybe_add_client_subchannel_filter(
-    grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
+    grpc_channel_stack_builder* builder, void* arg) {
   if (g_enable_client_subchannel_filter) {
     // Want to add the filter as close to the end as possible, to make
     // sure that all of the filters work well together.  However, we
diff --git a/test/core/end2end/tests/filter_causes_close.cc b/test/core/end2end/tests/filter_causes_close.cc
index 793f590..ec8f9db 100644
--- a/test/core/end2end/tests/filter_causes_close.cc
+++ b/test/core/end2end/tests/filter_causes_close.cc
@@ -197,12 +197,11 @@
   uint8_t unused;
 } channel_data;
 
-static void recv_im_ready(grpc_exec_ctx* exec_ctx, void* arg,
-                          grpc_error* error) {
+static void recv_im_ready(void* arg, grpc_error* error) {
   grpc_call_element* elem = (grpc_call_element*)arg;
   call_data* calld = (call_data*)elem->call_data;
   GRPC_CLOSURE_RUN(
-      exec_ctx, calld->recv_im_ready,
+      calld->recv_im_ready,
       grpc_error_set_int(GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                              "Failure that's not preventable.", &error, 1),
                          GRPC_ERROR_INT_GRPC_STATUS,
@@ -210,8 +209,7 @@
 }
 
 static void start_transport_stream_op_batch(
-    grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-    grpc_transport_stream_op_batch* op) {
+    grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   call_data* calld = (call_data*)elem->call_data;
   if (op->recv_initial_metadata) {
     calld->recv_im_ready =
@@ -219,27 +217,24 @@
     op->payload->recv_initial_metadata.recv_initial_metadata_ready =
         GRPC_CLOSURE_CREATE(recv_im_ready, elem, grpc_schedule_on_exec_ctx);
   }
-  grpc_call_next_op(exec_ctx, elem, op);
+  grpc_call_next_op(elem, op);
 }
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {}
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 static const grpc_channel_filter test_filter = {
     start_transport_stream_op_batch,
@@ -258,8 +253,7 @@
  * Registration
  */
 
-static bool maybe_add_filter(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_stack_builder* builder, void* arg) {
+static bool maybe_add_filter(grpc_channel_stack_builder* builder, void* arg) {
   if (g_enable_filter) {
     return grpc_channel_stack_builder_prepend_filter(builder, &test_filter,
                                                      nullptr, nullptr);
diff --git a/test/core/end2end/tests/filter_latency.cc b/test/core/end2end/tests/filter_latency.cc
index c4d96eb..845cbc0 100644
--- a/test/core/end2end/tests/filter_latency.cc
+++ b/test/core/end2end/tests/filter_latency.cc
@@ -247,14 +247,12 @@
  * Test latency filter
  */
 
-static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
-                                  grpc_call_element* elem,
+static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void client_destroy_call_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+static void client_destroy_call_elem(grpc_call_element* elem,
                                      const grpc_call_final_info* final_info,
                                      grpc_closure* ignored) {
   gpr_mu_lock(&g_mu);
@@ -262,8 +260,7 @@
   gpr_mu_unlock(&g_mu);
 }
 
-static void server_destroy_call_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_call_element* elem,
+static void server_destroy_call_elem(grpc_call_element* elem,
                                      const grpc_call_final_info* final_info,
                                      grpc_closure* ignored) {
   gpr_mu_lock(&g_mu);
@@ -271,14 +268,12 @@
   gpr_mu_unlock(&g_mu);
 }
 
-static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx,
-                                     grpc_channel_element* elem,
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void destroy_channel_elem(grpc_exec_ctx* exec_ctx,
-                                 grpc_channel_element* elem) {}
+static void destroy_channel_elem(grpc_channel_element* elem) {}
 
 static const grpc_channel_filter test_client_filter = {
     grpc_call_next_op,
@@ -310,8 +305,7 @@
  * Registration
  */
 
-static bool maybe_add_filter(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_stack_builder* builder, void* arg) {
+static bool maybe_add_filter(grpc_channel_stack_builder* builder, void* arg) {
   grpc_channel_filter* filter = (grpc_channel_filter*)arg;
   if (g_enable_filter) {
     // Want to add the filter as close to the end as possible, to make
diff --git a/test/core/end2end/tests/load_reporting_hook.cc b/test/core/end2end/tests/load_reporting_hook.cc
index faabec3..e056bd5 100644
--- a/test/core/end2end/tests/load_reporting_hook.cc
+++ b/test/core/end2end/tests/load_reporting_hook.cc
@@ -300,9 +300,8 @@
                                 &trailing_lr_metadata);
   end_test(&f);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, lr_server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(lr_server_args);
   }
   config.tear_down_data(&f);
 }
diff --git a/test/core/end2end/tests/max_message_length.cc b/test/core/end2end/tests/max_message_length.cc
index f1ac27f..e581f1f 100644
--- a/test/core/end2end/tests/max_message_length.cc
+++ b/test/core/end2end/tests/max_message_length.cc
@@ -173,12 +173,9 @@
   f = begin_test(config, "test_max_request_message_length", client_args,
                  server_args);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    if (client_args != nullptr)
-      grpc_channel_args_destroy(&exec_ctx, client_args);
-    if (server_args != nullptr)
-      grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    if (client_args != nullptr) grpc_channel_args_destroy(client_args);
+    if (server_args != nullptr) grpc_channel_args_destroy(server_args);
   }
 
   cqv = cq_verifier_create(f.cq);
@@ -366,12 +363,9 @@
   f = begin_test(config, "test_max_response_message_length", client_args,
                  server_args);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    if (client_args != nullptr)
-      grpc_channel_args_destroy(&exec_ctx, client_args);
-    if (server_args != nullptr)
-      grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    if (client_args != nullptr) grpc_channel_args_destroy(client_args);
+    if (server_args != nullptr) grpc_channel_args_destroy(server_args);
   }
   cqv = cq_verifier_create(f.cq);
 
diff --git a/test/core/end2end/tests/stream_compression_compressed_payload.cc b/test/core/end2end/tests/stream_compression_compressed_payload.cc
index d733464..ec3050a 100644
--- a/test/core/end2end/tests/stream_compression_compressed_payload.cc
+++ b/test/core/end2end/tests/stream_compression_compressed_payload.cc
@@ -129,10 +129,9 @@
   server_args = grpc_channel_args_set_stream_compression_algorithm(
       nullptr, GRPC_STREAM_COMPRESS_NONE);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     server_args = grpc_channel_args_stream_compression_algorithm_set_state(
-        &exec_ctx, &server_args, algorithm_to_disable, false);
-    grpc_exec_ctx_finish(&exec_ctx);
+        &server_args, algorithm_to_disable, false);
   }
 
   f = begin_test(config, test_name, client_args, server_args);
@@ -258,10 +257,9 @@
   grpc_byte_buffer_destroy(request_payload_recv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
@@ -547,10 +545,9 @@
   cq_verifier_destroy(cqv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
diff --git a/test/core/end2end/tests/stream_compression_payload.cc b/test/core/end2end/tests/stream_compression_payload.cc
index 924961e..b95e652 100644
--- a/test/core/end2end/tests/stream_compression_payload.cc
+++ b/test/core/end2end/tests/stream_compression_payload.cc
@@ -277,10 +277,9 @@
   end_test(&f);
   config.tear_down_data(&f);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 }
 
diff --git a/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc b/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
index d3b526f..2a8799e 100644
--- a/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
+++ b/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
@@ -275,10 +275,9 @@
   end_test(&f);
   config.tear_down_data(&f);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 }
 
diff --git a/test/core/end2end/tests/workaround_cronet_compression.cc b/test/core/end2end/tests/workaround_cronet_compression.cc
index bc4d507..d4decce 100644
--- a/test/core/end2end/tests/workaround_cronet_compression.cc
+++ b/test/core/end2end/tests/workaround_cronet_compression.cc
@@ -142,15 +142,14 @@
       nullptr, default_server_channel_compression_algorithm);
 
   if (user_agent_override) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_channel_args* client_args_old = client_args;
     grpc_arg arg;
     arg.key = const_cast<char*>(GRPC_ARG_PRIMARY_USER_AGENT_STRING);
     arg.type = GRPC_ARG_STRING;
     arg.value.string = user_agent_override;
     client_args = grpc_channel_args_copy_and_add(client_args_old, &arg, 1);
-    grpc_channel_args_destroy(&exec_ctx, client_args_old);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_channel_args_destroy(client_args_old);
   }
 
   f = begin_test(config, test_name, client_args, server_args);
@@ -351,10 +350,9 @@
   cq_verifier_destroy(cqv);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, client_args);
-    grpc_channel_args_destroy(&exec_ctx, server_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(client_args);
+    grpc_channel_args_destroy(server_args);
   }
 
   end_test(&f);
diff --git a/test/core/handshake/client_ssl.cc b/test/core/handshake/client_ssl.cc
index 2b149a7..2302e3d 100644
--- a/test/core/handshake/client_ssl.cc
+++ b/test/core/handshake/client_ssl.cc
@@ -231,7 +231,8 @@
   gpr_thd_id thdid;
   gpr_thd_options_set_joinable(&thdopt);
   server_args args = {server_socket, server_alpn_preferred};
-  GPR_ASSERT(gpr_thd_new(&thdid, server_thread, &args, &thdopt));
+  GPR_ASSERT(gpr_thd_new(&thdid, "grpc_client_ssl_test", server_thread, &args,
+                         &thdopt));
 
   // Load key pair and establish client SSL credentials.
   grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
diff --git a/test/core/handshake/readahead_handshaker_server_ssl.cc b/test/core/handshake/readahead_handshaker_server_ssl.cc
index 2810082..599e0e1 100644
--- a/test/core/handshake/readahead_handshaker_server_ssl.cc
+++ b/test/core/handshake/readahead_handshaker_server_ssl.cc
@@ -49,41 +49,37 @@
  * to the security_handshaker). This test is meant to protect code relying on
  * this functionality that lives outside of this repo. */
 
-static void readahead_handshaker_destroy(grpc_exec_ctx* ctx,
-                                         grpc_handshaker* handshaker) {
+static void readahead_handshaker_destroy(grpc_handshaker* handshaker) {
   gpr_free(handshaker);
 }
 
-static void readahead_handshaker_shutdown(grpc_exec_ctx* ctx,
-                                          grpc_handshaker* handshaker,
+static void readahead_handshaker_shutdown(grpc_handshaker* handshaker,
                                           grpc_error* error) {}
 
 static void readahead_handshaker_do_handshake(
-    grpc_exec_ctx* ctx, grpc_handshaker* handshaker,
-    grpc_tcp_server_acceptor* acceptor, grpc_closure* on_handshake_done,
-    grpc_handshaker_args* args) {
-  grpc_endpoint_read(ctx, args->endpoint, args->read_buffer, on_handshake_done);
+    grpc_handshaker* handshaker, grpc_tcp_server_acceptor* acceptor,
+    grpc_closure* on_handshake_done, grpc_handshaker_args* args) {
+  grpc_endpoint_read(args->endpoint, args->read_buffer, on_handshake_done);
 }
 
 const grpc_handshaker_vtable readahead_handshaker_vtable = {
     readahead_handshaker_destroy, readahead_handshaker_shutdown,
     readahead_handshaker_do_handshake};
 
-static grpc_handshaker* readahead_handshaker_create(grpc_exec_ctx* ctx) {
+static grpc_handshaker* readahead_handshaker_create() {
   grpc_handshaker* h = (grpc_handshaker*)gpr_zalloc(sizeof(grpc_handshaker));
   grpc_handshaker_init(&readahead_handshaker_vtable, h);
   return h;
 }
 
 static void readahead_handshaker_factory_add_handshakers(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* hf,
-    const grpc_channel_args* args, grpc_handshake_manager* handshake_mgr) {
-  grpc_handshake_manager_add(handshake_mgr,
-                             readahead_handshaker_create(exec_ctx));
+    grpc_handshaker_factory* hf, const grpc_channel_args* args,
+    grpc_handshake_manager* handshake_mgr) {
+  grpc_handshake_manager_add(handshake_mgr, readahead_handshaker_create());
 }
 
 static void readahead_handshaker_factory_destroy(
-    grpc_exec_ctx* exec_ctx, grpc_handshaker_factory* handshaker_factory) {}
+    grpc_handshaker_factory* handshaker_factory) {}
 
 static const grpc_handshaker_factory_vtable
     readahead_handshaker_factory_vtable = {
diff --git a/test/core/handshake/server_ssl_common.cc b/test/core/handshake/server_ssl_common.cc
index 599b281..0bf453a 100644
--- a/test/core/handshake/server_ssl_common.cc
+++ b/test/core/handshake/server_ssl_common.cc
@@ -137,7 +137,8 @@
   gpr_thd_options thdopt = gpr_thd_options_default();
   gpr_thd_id thdid;
   gpr_thd_options_set_joinable(&thdopt);
-  GPR_ASSERT(gpr_thd_new(&thdid, server_thread, &port, &thdopt));
+  GPR_ASSERT(
+      gpr_thd_new(&thdid, "grpc_ssl_test", server_thread, &port, &thdopt));
 
   SSL_load_error_strings();
   OpenSSL_add_ssl_algorithms();
diff --git a/test/core/http/format_request_test.cc b/test/core/http/format_request_test.cc
index 684738a..353e138 100644
--- a/test/core/http/format_request_test.cc
+++ b/test/core/http/format_request_test.cc
@@ -139,11 +139,13 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   test_format_get_request();
   test_format_post_request();
   test_format_post_request_no_body();
   test_format_post_request_content_type_override();
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/http/httpcli_test.cc b/test/core/http/httpcli_test.cc
index 81e9374..259e3aa 100644
--- a/test/core/http/httpcli_test.cc
+++ b/test/core/http/httpcli_test.cc
@@ -40,7 +40,7 @@
       grpc_timeout_seconds_to_deadline(seconds));
 }
 
-static void on_finish(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_finish(void* arg, grpc_error* error) {
   const char* expect =
       "<html><head><title>Hello world!</title></head>"
       "<body><p>This is a test</p></body></html>";
@@ -53,15 +53,14 @@
   g_done = 1;
   GPR_ASSERT(GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                        nullptr)));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&g_pops), nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
 static void test_get(int port) {
   grpc_httpcli_request req;
   char* host;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   g_done = 0;
   gpr_log(GPR_INFO, "test_get");
@@ -78,19 +77,18 @@
   memset(&response, 0, sizeof(response));
   grpc_resource_quota* resource_quota = grpc_resource_quota_create("test_get");
   grpc_httpcli_get(
-      &exec_ctx, &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
+      &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
       GRPC_CLOSURE_CREATE(on_finish, &response, grpc_schedule_on_exec_ctx),
       &response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                          &worker, n_seconds_time(1))));
+        "pollset_work", grpc_pollset_work(grpc_polling_entity_pollset(&g_pops),
+                                          &worker, n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -101,7 +99,7 @@
 static void test_post(int port) {
   grpc_httpcli_request req;
   char* host;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   g_done = 0;
   gpr_log(GPR_INFO, "test_post");
@@ -118,20 +116,18 @@
   memset(&response, 0, sizeof(response));
   grpc_resource_quota* resource_quota = grpc_resource_quota_create("test_post");
   grpc_httpcli_post(
-      &exec_ctx, &g_context, &g_pops, resource_quota, &req, "hello", 5,
-      n_seconds_time(15),
+      &g_context, &g_pops, resource_quota, &req, "hello", 5, n_seconds_time(15),
       GRPC_CLOSURE_CREATE(on_finish, &response, grpc_schedule_on_exec_ctx),
       &response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                          &worker, n_seconds_time(1))));
+        "pollset_work", grpc_pollset_work(grpc_polling_entity_pollset(&g_pops),
+                                          &worker, n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -139,69 +135,69 @@
   grpc_http_response_destroy(&response);
 }
 
-static void destroy_pops(grpc_exec_ctx* exec_ctx, void* p, grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, grpc_polling_entity_pollset(
-                                     static_cast<grpc_polling_entity*>(p)));
+static void destroy_pops(void* p, grpc_error* error) {
+  grpc_pollset_destroy(
+      grpc_polling_entity_pollset(static_cast<grpc_polling_entity*>(p)));
 }
 
 int main(int argc, char** argv) {
-  grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_subprocess* server;
-  char* me = argv[0];
-  char* lslash = strrchr(me, '/');
-  char* args[4];
-  int port = grpc_pick_unused_port_or_die();
-  int arg_shift = 0;
-  /* figure out where we are */
-  char* root;
-  if (lslash) {
-    root = static_cast<char*>(gpr_malloc((size_t)(lslash - me + 1)));
-    memcpy(root, me, (size_t)(lslash - me));
-    root[lslash - me] = 0;
-  } else {
-    root = gpr_strdup(".");
-  }
-
-  GPR_ASSERT(argc <= 2);
-  if (argc == 2) {
-    args[0] = gpr_strdup(argv[1]);
-  } else {
-    arg_shift = 1;
-    gpr_asprintf(&args[0], "%s/../../tools/distrib/python_wrapper.sh", root);
-    gpr_asprintf(&args[1], "%s/../../test/core/http/test_server.py", root);
-  }
-
-  /* start the server */
-  args[1 + arg_shift] = const_cast<char*>("--port");
-  gpr_asprintf(&args[2 + arg_shift], "%d", port);
-  server = gpr_subprocess_create(3 + arg_shift, (const char**)args);
-  GPR_ASSERT(server);
-  gpr_free(args[0]);
-  if (arg_shift) gpr_free(args[1]);
-  gpr_free(args[2 + arg_shift]);
-  gpr_free(root);
-
-  gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
-                               gpr_time_from_seconds(5, GPR_TIMESPAN)));
-
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_httpcli_context_init(&g_context);
-  grpc_pollset* pollset =
-      static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(pollset, &g_mu);
-  g_pops = grpc_polling_entity_create_from_pollset(pollset);
+  {
+    grpc_closure destroyed;
+    grpc_core::ExecCtx exec_ctx;
+    char* me = argv[0];
+    char* lslash = strrchr(me, '/');
+    char* args[4];
+    int port = grpc_pick_unused_port_or_die();
+    int arg_shift = 0;
+    /* figure out where we are */
+    char* root;
+    if (lslash) {
+      root = static_cast<char*>(gpr_malloc((size_t)(lslash - me + 1)));
+      memcpy(root, me, (size_t)(lslash - me));
+      root[lslash - me] = 0;
+    } else {
+      root = gpr_strdup(".");
+    }
 
-  test_get(port);
-  test_post(port);
+    GPR_ASSERT(argc <= 2);
+    if (argc == 2) {
+      args[0] = gpr_strdup(argv[1]);
+    } else {
+      arg_shift = 1;
+      gpr_asprintf(&args[0], "%s/../../tools/distrib/python_wrapper.sh", root);
+      gpr_asprintf(&args[1], "%s/../../test/core/http/test_server.py", root);
+    }
 
-  grpc_httpcli_context_destroy(&exec_ctx, &g_context);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pops, &g_pops,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                        &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+    /* start the server */
+    args[1 + arg_shift] = const_cast<char*>("--port");
+    gpr_asprintf(&args[2 + arg_shift], "%d", port);
+    server = gpr_subprocess_create(3 + arg_shift, (const char**)args);
+    GPR_ASSERT(server);
+    gpr_free(args[0]);
+    if (arg_shift) gpr_free(args[1]);
+    gpr_free(args[2 + arg_shift]);
+    gpr_free(root);
+
+    gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                                 gpr_time_from_seconds(5, GPR_TIMESPAN)));
+
+    grpc_httpcli_context_init(&g_context);
+    grpc_pollset* pollset =
+        static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(pollset, &g_mu);
+    g_pops = grpc_polling_entity_create_from_pollset(pollset);
+
+    test_get(port);
+    test_post(port);
+
+    grpc_httpcli_context_destroy(&g_context);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pops, &g_pops,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(grpc_polling_entity_pollset(&g_pops), &destroyed);
+  }
   grpc_shutdown();
 
   gpr_free(grpc_polling_entity_pollset(&g_pops));
diff --git a/test/core/http/httpscli_test.cc b/test/core/http/httpscli_test.cc
index da8405c..adf69f1 100644
--- a/test/core/http/httpscli_test.cc
+++ b/test/core/http/httpscli_test.cc
@@ -40,7 +40,7 @@
       grpc_timeout_seconds_to_deadline(seconds));
 }
 
-static void on_finish(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void on_finish(void* arg, grpc_error* error) {
   const char* expect =
       "<html><head><title>Hello world!</title></head>"
       "<body><p>This is a test</p></body></html>";
@@ -53,15 +53,14 @@
   g_done = 1;
   GPR_ASSERT(GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                        nullptr)));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&g_pops), nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
 static void test_get(int port) {
   grpc_httpcli_request req;
   char* host;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   g_done = 0;
   gpr_log(GPR_INFO, "test_get");
@@ -79,19 +78,18 @@
   memset(&response, 0, sizeof(response));
   grpc_resource_quota* resource_quota = grpc_resource_quota_create("test_get");
   grpc_httpcli_get(
-      &exec_ctx, &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
+      &g_context, &g_pops, resource_quota, &req, n_seconds_time(15),
       GRPC_CLOSURE_CREATE(on_finish, &response, grpc_schedule_on_exec_ctx),
       &response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                          &worker, n_seconds_time(1))));
+        "pollset_work", grpc_pollset_work(grpc_polling_entity_pollset(&g_pops),
+                                          &worker, n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -102,7 +100,7 @@
 static void test_post(int port) {
   grpc_httpcli_request req;
   char* host;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   g_done = 0;
   gpr_log(GPR_INFO, "test_post");
@@ -120,20 +118,18 @@
   memset(&response, 0, sizeof(response));
   grpc_resource_quota* resource_quota = grpc_resource_quota_create("test_post");
   grpc_httpcli_post(
-      &exec_ctx, &g_context, &g_pops, resource_quota, &req, "hello", 5,
-      n_seconds_time(15),
+      &g_context, &g_pops, resource_quota, &req, "hello", 5, n_seconds_time(15),
       GRPC_CLOSURE_CREATE(on_finish, &response, grpc_schedule_on_exec_ctx),
       &response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+  grpc_resource_quota_unref_internal(resource_quota);
   gpr_mu_lock(g_mu);
   while (!g_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                          &worker, n_seconds_time(1))));
+        "pollset_work", grpc_pollset_work(grpc_polling_entity_pollset(&g_pops),
+                                          &worker, n_seconds_time(1))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -141,14 +137,13 @@
   grpc_http_response_destroy(&response);
 }
 
-static void destroy_pops(grpc_exec_ctx* exec_ctx, void* p, grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, grpc_polling_entity_pollset(
-                                     static_cast<grpc_polling_entity*>(p)));
+static void destroy_pops(void* p, grpc_error* error) {
+  grpc_pollset_destroy(
+      grpc_polling_entity_pollset(static_cast<grpc_polling_entity*>(p)));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   gpr_subprocess* server;
   char* me = argv[0];
   char* lslash = strrchr(me, '/');
@@ -199,12 +194,13 @@
   test_get(port);
   test_post(port);
 
-  grpc_httpcli_context_destroy(&exec_ctx, &g_context);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pops, &g_pops,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&g_pops),
-                        &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_httpcli_context_destroy(&g_context);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pops, &g_pops,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(grpc_polling_entity_pollset(&g_pops), &destroyed);
+  }
   grpc_shutdown();
 
   gpr_free(grpc_polling_entity_pollset(&g_pops));
diff --git a/test/core/http/parser_test.cc b/test/core/http/parser_test.cc
index 0b60e36..18f1985 100644
--- a/test/core/http/parser_test.cc
+++ b/test/core/http/parser_test.cc
@@ -21,6 +21,7 @@
 #include <stdarg.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
@@ -217,6 +218,7 @@
   char *tmp1, *tmp2;
 
   grpc_test_init(argc, argv);
+  grpc_init();
 
   for (i = 0; i < GPR_ARRAY_SIZE(split_modes); i++) {
     test_succeeds(split_modes[i],
@@ -300,5 +302,6 @@
     gpr_free(tmp2);
   }
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/http/request_fuzzer.cc b/test/core/http/request_fuzzer.cc
index 368ac1b..9798cfb 100644
--- a/test/core/http/request_fuzzer.cc
+++ b/test/core/http/request_fuzzer.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/http/parser.h"
@@ -30,6 +31,7 @@
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_http_parser parser;
   grpc_http_request request;
+  grpc_init();
   memset(&request, 0, sizeof(request));
   grpc_http_parser_init(&parser, GRPC_HTTP_REQUEST, &request);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
@@ -38,5 +40,6 @@
   grpc_slice_unref(slice);
   grpc_http_parser_destroy(&parser);
   grpc_http_request_destroy(&request);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/http/response_fuzzer.cc b/test/core/http/response_fuzzer.cc
index 2a793fd..fc0904b 100644
--- a/test/core/http/response_fuzzer.cc
+++ b/test/core/http/response_fuzzer.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/http/parser.h"
@@ -29,6 +30,7 @@
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_http_parser parser;
   grpc_http_response response;
+  grpc_init();
   memset(&response, 0, sizeof(response));
   grpc_http_parser_init(&parser, GRPC_HTTP_RESPONSE, &response);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
@@ -37,5 +39,6 @@
   grpc_slice_unref(slice);
   grpc_http_parser_destroy(&parser);
   grpc_http_response_destroy(&response);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/combiner_test.cc b/test/core/iomgr/combiner_test.cc
index 146a6bd..891008c 100644
--- a/test/core/iomgr/combiner_test.cc
+++ b/test/core/iomgr/combiner_test.cc
@@ -28,13 +28,11 @@
 
 static void test_no_op(void) {
   gpr_log(GPR_DEBUG, "test_no_op");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_COMBINER_UNREF(&exec_ctx, grpc_combiner_create(), "test_no_op");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_COMBINER_UNREF(grpc_combiner_create(), "test_no_op");
 }
 
-static void set_event_to_true(grpc_exec_ctx* exec_ctx, void* value,
-                              grpc_error* error) {
+static void set_event_to_true(void* value, grpc_error* error) {
   gpr_event_set(static_cast<gpr_event*>(value), (void*)1);
 }
 
@@ -44,16 +42,14 @@
   grpc_combiner* lock = grpc_combiner_create();
   gpr_event done;
   gpr_event_init(&done);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CLOSURE_SCHED(&exec_ctx,
-                     GRPC_CLOSURE_CREATE(set_event_to_true, &done,
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(set_event_to_true, &done,
                                          grpc_combiner_scheduler(lock)),
                      GRPC_ERROR_NONE);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&done, grpc_timeout_seconds_to_deadline(5)) !=
              nullptr);
-  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_one");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(lock, "test_execute_one");
 }
 
 typedef struct {
@@ -67,7 +63,7 @@
   size_t value;
 } ex_args;
 
-static void check_one(grpc_exec_ctx* exec_ctx, void* a, grpc_error* error) {
+static void check_one(void* a, grpc_error* error) {
   ex_args* args = static_cast<ex_args*>(a);
   GPR_ASSERT(*args->ctr == args->value - 1);
   *args->ctr = args->value;
@@ -76,28 +72,25 @@
 
 static void execute_many_loop(void* a) {
   thd_args* args = static_cast<thd_args*>(a);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   size_t n = 1;
   for (size_t i = 0; i < 10; i++) {
     for (size_t j = 0; j < 10000; j++) {
       ex_args* c = static_cast<ex_args*>(gpr_malloc(sizeof(*c)));
       c->ctr = &args->ctr;
       c->value = n++;
-      GRPC_CLOSURE_SCHED(&exec_ctx,
-                         GRPC_CLOSURE_CREATE(
+      GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(
                              check_one, c, grpc_combiner_scheduler(args->lock)),
                          GRPC_ERROR_NONE);
-      grpc_exec_ctx_flush(&exec_ctx);
+      grpc_core::ExecCtx::Get()->Flush();
     }
     // sleep for a little bit, to test a combiner draining and another thread
     // picking it up
     gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(100));
   }
-  GRPC_CLOSURE_SCHED(&exec_ctx,
-                     GRPC_CLOSURE_CREATE(set_event_to_true, &args->done,
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(set_event_to_true, &args->done,
                                          grpc_combiner_scheduler(args->lock)),
                      GRPC_ERROR_NONE);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_execute_many(void) {
@@ -112,27 +105,26 @@
     ta[i].ctr = 0;
     ta[i].lock = lock;
     gpr_event_init(&ta[i].done);
-    GPR_ASSERT(gpr_thd_new(&thds[i], execute_many_loop, &ta[i], &options));
+    GPR_ASSERT(gpr_thd_new(&thds[i], "grpc_execute_many", execute_many_loop,
+                           &ta[i], &options));
   }
   for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
     GPR_ASSERT(gpr_event_wait(&ta[i].done,
                               gpr_inf_future(GPR_CLOCK_REALTIME)) != nullptr);
     gpr_thd_join(thds[i]);
   }
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_many");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_COMBINER_UNREF(lock, "test_execute_many");
 }
 
 static gpr_event got_in_finally;
 
-static void in_finally(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void in_finally(void* arg, grpc_error* error) {
   gpr_event_set(&got_in_finally, (void*)1);
 }
 
-static void add_finally(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_CREATE(in_finally, arg,
+static void add_finally(void* arg, grpc_error* error) {
+  GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(in_finally, arg,
                                          grpc_combiner_finally_scheduler(
                                              static_cast<grpc_combiner*>(arg))),
                      GRPC_ERROR_NONE);
@@ -142,17 +134,15 @@
   gpr_log(GPR_DEBUG, "test_execute_finally");
 
   grpc_combiner* lock = grpc_combiner_create();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_event_init(&got_in_finally);
   GRPC_CLOSURE_SCHED(
-      &exec_ctx,
       GRPC_CLOSURE_CREATE(add_finally, lock, grpc_combiner_scheduler(lock)),
       GRPC_ERROR_NONE);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(gpr_event_wait(&got_in_finally,
                             grpc_timeout_seconds_to_deadline(5)) != nullptr);
-  GRPC_COMBINER_UNREF(&exec_ctx, lock, "test_execute_finally");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(lock, "test_execute_finally");
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/iomgr/endpoint_pair_test.cc b/test/core/iomgr/endpoint_pair_test.cc
index 30a0cb5..90dd40d 100644
--- a/test/core/iomgr/endpoint_pair_test.cc
+++ b/test/core/iomgr/endpoint_pair_test.cc
@@ -32,7 +32,7 @@
 
 static grpc_endpoint_test_fixture create_fixture_endpoint_pair(
     size_t slice_size) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_endpoint_test_fixture f;
   grpc_arg a[1];
   a[0].key = const_cast<char*>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
@@ -43,9 +43,8 @@
 
   f.client_ep = p.client;
   f.server_ep = p.server;
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.client_ep, g_pollset);
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.server_ep, g_pollset);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_add_to_pollset(f.client_ep, g_pollset);
+  grpc_endpoint_add_to_pollset(f.server_ep, g_pollset);
 
   return f;
 }
@@ -54,23 +53,23 @@
     {"tcp/tcp_socketpair", create_fixture_endpoint_pair, clean_up},
 };
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
-  grpc_endpoint_tests(configs[0], g_pollset, g_mu);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
+    grpc_endpoint_tests(configs[0], g_pollset, g_mu);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+  }
   grpc_shutdown();
   gpr_free(g_pollset);
 
diff --git a/test/core/iomgr/endpoint_tests.cc b/test/core/iomgr/endpoint_tests.cc
index 026e341..8ccae52 100644
--- a/test/core/iomgr/endpoint_tests.cc
+++ b/test/core/iomgr/endpoint_tests.cc
@@ -115,8 +115,7 @@
   grpc_closure done_write;
 };
 
-static void read_and_write_test_read_handler(grpc_exec_ctx* exec_ctx,
-                                             void* data, grpc_error* error) {
+static void read_and_write_test_read_handler(void* data, grpc_error* error) {
   struct read_and_write_test_state* state =
       (struct read_and_write_test_state*)data;
 
@@ -126,17 +125,14 @@
     gpr_log(GPR_INFO, "Read handler done");
     gpr_mu_lock(g_mu);
     state->read_done = 1 + (error == GRPC_ERROR_NONE);
-    GRPC_LOG_IF_ERROR("pollset_kick",
-                      grpc_pollset_kick(exec_ctx, g_pollset, nullptr));
+    GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr));
     gpr_mu_unlock(g_mu);
   } else if (error == GRPC_ERROR_NONE) {
-    grpc_endpoint_read(exec_ctx, state->read_ep, &state->incoming,
-                       &state->done_read);
+    grpc_endpoint_read(state->read_ep, &state->incoming, &state->done_read);
   }
 }
 
-static void read_and_write_test_write_handler(grpc_exec_ctx* exec_ctx,
-                                              void* data, grpc_error* error) {
+static void read_and_write_test_write_handler(void* data, grpc_error* error) {
   struct read_and_write_test_state* state =
       (struct read_and_write_test_state*)data;
   grpc_slice* slices = nullptr;
@@ -153,7 +149,7 @@
                                &state->current_write_data);
       grpc_slice_buffer_reset_and_unref(&state->outgoing);
       grpc_slice_buffer_addn(&state->outgoing, slices, nslices);
-      grpc_endpoint_write(exec_ctx, state->write_ep, &state->outgoing,
+      grpc_endpoint_write(state->write_ep, &state->outgoing,
                           &state->done_write);
       gpr_free(slices);
       return;
@@ -163,8 +159,7 @@
   gpr_log(GPR_INFO, "Write handler done");
   gpr_mu_lock(g_mu);
   state->write_done = 1 + (error == GRPC_ERROR_NONE);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, g_pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr));
   gpr_mu_unlock(g_mu);
 }
 
@@ -178,7 +173,7 @@
   struct read_and_write_test_state state;
   grpc_endpoint_test_fixture f =
       begin_test(config, "read_and_write_test", slice_size);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
   gpr_log(GPR_DEBUG,
@@ -217,66 +212,57 @@
      for the first iteration as for later iterations. It does the right thing
      even when bytes_written is unsigned. */
   state.bytes_written -= state.current_write_size;
-  read_and_write_test_write_handler(&exec_ctx, &state, GRPC_ERROR_NONE);
-  grpc_exec_ctx_flush(&exec_ctx);
+  read_and_write_test_write_handler(&state, GRPC_ERROR_NONE);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_endpoint_read(&exec_ctx, state.read_ep, &state.incoming,
-                     &state.done_read);
+  grpc_endpoint_read(state.read_ep, &state.incoming, &state.done_read);
 
   if (shutdown) {
     gpr_log(GPR_DEBUG, "shutdown read");
     grpc_endpoint_shutdown(
-        &exec_ctx, state.read_ep,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
+        state.read_ep, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
     gpr_log(GPR_DEBUG, "shutdown write");
     grpc_endpoint_shutdown(
-        &exec_ctx, state.write_ep,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
+        state.write_ep, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
   }
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   gpr_mu_lock(g_mu);
   while (!state.read_done || !state.write_done) {
     grpc_pollset_worker* worker = nullptr;
-    GPR_ASSERT(grpc_exec_ctx_now(&exec_ctx) < deadline);
+    GPR_ASSERT(grpc_core::ExecCtx::Get()->Now() < deadline);
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
   }
   gpr_mu_unlock(g_mu);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   end_test(config);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.outgoing);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
-  grpc_endpoint_destroy(&exec_ctx, state.read_ep);
-  grpc_endpoint_destroy(&exec_ctx, state.write_ep);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_buffer_destroy_internal(&state.outgoing);
+  grpc_slice_buffer_destroy_internal(&state.incoming);
+  grpc_endpoint_destroy(state.read_ep);
+  grpc_endpoint_destroy(state.write_ep);
 }
 
-static void inc_on_failure(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
+static void inc_on_failure(void* arg, grpc_error* error) {
   gpr_mu_lock(g_mu);
   *(int*)arg += (error != GRPC_ERROR_NONE);
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
-static void wait_for_fail_count(grpc_exec_ctx* exec_ctx, int* fail_count,
-                                int want_fail_count) {
-  grpc_exec_ctx_flush(exec_ctx);
+static void wait_for_fail_count(int* fail_count, int want_fail_count) {
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(g_mu);
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(10));
-  while (grpc_exec_ctx_now(exec_ctx) < deadline &&
+  while (grpc_core::ExecCtx::Get()->Now() < deadline &&
          *fail_count < want_fail_count) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(*fail_count == want_fail_count);
@@ -291,33 +277,32 @@
   grpc_slice_buffer slice_buffer;
   grpc_slice_buffer_init(&slice_buffer);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.client_ep, g_pollset);
-  grpc_endpoint_read(&exec_ctx, f.client_ep, &slice_buffer,
+  grpc_core::ExecCtx exec_ctx;
+  grpc_endpoint_add_to_pollset(f.client_ep, g_pollset);
+  grpc_endpoint_read(f.client_ep, &slice_buffer,
                      GRPC_CLOSURE_CREATE(inc_on_failure, &fail_count,
                                          grpc_schedule_on_exec_ctx));
-  wait_for_fail_count(&exec_ctx, &fail_count, 0);
-  grpc_endpoint_shutdown(&exec_ctx, f.client_ep,
+  wait_for_fail_count(&fail_count, 0);
+  grpc_endpoint_shutdown(f.client_ep,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
-  wait_for_fail_count(&exec_ctx, &fail_count, 1);
-  grpc_endpoint_read(&exec_ctx, f.client_ep, &slice_buffer,
+  wait_for_fail_count(&fail_count, 1);
+  grpc_endpoint_read(f.client_ep, &slice_buffer,
                      GRPC_CLOSURE_CREATE(inc_on_failure, &fail_count,
                                          grpc_schedule_on_exec_ctx));
-  wait_for_fail_count(&exec_ctx, &fail_count, 2);
+  wait_for_fail_count(&fail_count, 2);
   grpc_slice_buffer_add(&slice_buffer, grpc_slice_from_copied_string("a"));
-  grpc_endpoint_write(&exec_ctx, f.client_ep, &slice_buffer,
+  grpc_endpoint_write(f.client_ep, &slice_buffer,
                       GRPC_CLOSURE_CREATE(inc_on_failure, &fail_count,
                                           grpc_schedule_on_exec_ctx));
-  wait_for_fail_count(&exec_ctx, &fail_count, 3);
-  grpc_endpoint_shutdown(&exec_ctx, f.client_ep,
+  wait_for_fail_count(&fail_count, 3);
+  grpc_endpoint_shutdown(f.client_ep,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Test Shutdown"));
-  wait_for_fail_count(&exec_ctx, &fail_count, 3);
+  wait_for_fail_count(&fail_count, 3);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &slice_buffer);
+  grpc_slice_buffer_destroy_internal(&slice_buffer);
 
-  grpc_endpoint_destroy(&exec_ctx, f.client_ep);
-  grpc_endpoint_destroy(&exec_ctx, f.server_ep);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_destroy(f.client_ep);
+  grpc_endpoint_destroy(f.server_ep);
 }
 
 void grpc_endpoint_tests(grpc_endpoint_test_config config,
diff --git a/test/core/iomgr/ev_epollsig_linux_test.cc b/test/core/iomgr/ev_epollsig_linux_test.cc
index ac8b2f4..e767e01 100644
--- a/test/core/iomgr/ev_epollsig_linux_test.cc
+++ b/test/core/iomgr/ev_epollsig_linux_test.cc
@@ -70,19 +70,18 @@
   }
 }
 
-static void test_fd_cleanup(grpc_exec_ctx* exec_ctx, test_fd* tfds,
-                            int num_fds) {
+static void test_fd_cleanup(test_fd* tfds, int num_fds) {
   int release_fd;
   int i;
 
   for (i = 0; i < num_fds; i++) {
-    grpc_fd_shutdown(exec_ctx, tfds[i].fd,
+    grpc_fd_shutdown(tfds[i].fd,
                      GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_fd_cleanup"));
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
 
-    grpc_fd_orphan(exec_ctx, tfds[i].fd, nullptr, &release_fd,
-                   false /* already_closed */, "test_fd_cleanup");
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_fd_orphan(tfds[i].fd, nullptr, &release_fd, false /* already_closed */,
+                   "test_fd_cleanup");
+    grpc_core::ExecCtx::Get()->Flush();
 
     GPR_ASSERT(release_fd == tfds[i].inner_fd);
     close(tfds[i].inner_fd);
@@ -98,22 +97,20 @@
   }
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, (grpc_pollset*)p);
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy((grpc_pollset*)p);
 }
 
-static void test_pollset_cleanup(grpc_exec_ctx* exec_ctx,
-                                 test_pollset* pollsets, int num_pollsets) {
+static void test_pollset_cleanup(test_pollset* pollsets, int num_pollsets) {
   grpc_closure destroyed;
   int i;
 
   for (i = 0; i < num_pollsets; i++) {
     GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, pollsets[i].pollset,
                       grpc_schedule_on_exec_ctx);
-    grpc_pollset_shutdown(exec_ctx, pollsets[i].pollset, &destroyed);
+    grpc_pollset_shutdown(pollsets[i].pollset, &destroyed);
 
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_free(pollsets[i].pollset);
   }
 }
@@ -133,7 +130,7 @@
 #define NUM_POLLSETS 4
 
 static void test_add_fd_to_pollset() {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   test_fd tfds[NUM_FDS];
   int fds[NUM_FDS];
   test_pollset pollsets[NUM_POLLSETS];
@@ -170,33 +167,33 @@
 
   /* == Step 1 == */
   for (i = 0; i <= 2; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[0].pollset, tfds[i].fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(pollsets[0].pollset, tfds[i].fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   for (i = 3; i <= 4; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, tfds[i].fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(pollsets[1].pollset, tfds[i].fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   for (i = 5; i <= 7; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, tfds[i].fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(pollsets[2].pollset, tfds[i].fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   /* == Step 2 == */
   for (i = 0; i <= 1; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[3].pollset, tfds[i].fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(pollsets[3].pollset, tfds[i].fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   /* == Step 3 == */
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, tfds[0].fd);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_pollset_add_fd(pollsets[1].pollset, tfds[0].fd);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* == Step 4 == */
-  grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, tfds[3].fd);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_pollset_add_fd(pollsets[2].pollset, tfds[3].fd);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* All polling islands are merged at this point */
 
@@ -213,9 +210,8 @@
         expected_pi, grpc_pollset_get_polling_island(pollsets[i].pollset)));
   }
 
-  test_fd_cleanup(&exec_ctx, tfds, NUM_FDS);
-  test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS);
-  grpc_exec_ctx_finish(&exec_ctx);
+  test_fd_cleanup(tfds, NUM_FDS);
+  test_pollset_cleanup(pollsets, NUM_POLLSETS);
 }
 
 #undef NUM_FDS
@@ -235,26 +231,24 @@
 static void test_threading_loop(void* arg) {
   threading_shared* shared = static_cast<threading_shared*>(arg);
   while (thread_wakeups < 1000000) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_pollset_worker* worker;
     gpr_mu_lock(shared->mu);
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, shared->pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(shared->pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(shared->mu);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
-static void test_threading_wakeup(grpc_exec_ctx* exec_ctx, void* arg,
-                                  grpc_error* error) {
+static void test_threading_wakeup(void* arg, grpc_error* error) {
   threading_shared* shared = static_cast<threading_shared*>(arg);
   ++shared->wakeups;
   ++thread_wakeups;
   if (error == GRPC_ERROR_NONE) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "consume_wakeup", grpc_wakeup_fd_consume_wakeup(shared->wakeup_fd)));
-    grpc_fd_notify_on_read(exec_ctx, shared->wakeup_desc, &shared->on_wakeup);
+    grpc_fd_notify_on_read(shared->wakeup_desc, &shared->on_wakeup);
     GPR_ASSERT(GRPC_LOG_IF_ERROR("wakeup_next",
                                  grpc_wakeup_fd_wakeup(shared->wakeup_fd)));
   }
@@ -269,7 +263,7 @@
   for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
     gpr_thd_options opt = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&opt);
-    gpr_thd_new(&thds[i], test_threading_loop, &shared, &opt);
+    gpr_thd_new(&thds[i], "test_thread", test_threading_loop, &shared, &opt);
   }
   grpc_wakeup_fd fd;
   GPR_ASSERT(GRPC_LOG_IF_ERROR("wakeup_fd_init", grpc_wakeup_fd_init(&fd)));
@@ -277,13 +271,12 @@
   shared.wakeup_desc = grpc_fd_create(fd.read_fd, "wakeup");
   shared.wakeups = 0;
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_pollset_add_fd(&exec_ctx, shared.pollset, shared.wakeup_desc);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_pollset_add_fd(shared.pollset, shared.wakeup_desc);
     grpc_fd_notify_on_read(
-        &exec_ctx, shared.wakeup_desc,
+        shared.wakeup_desc,
         GRPC_CLOSURE_INIT(&shared.on_wakeup, test_threading_wakeup, &shared,
                           grpc_schedule_on_exec_ctx));
-    grpc_exec_ctx_finish(&exec_ctx);
   }
   GPR_ASSERT(GRPC_LOG_IF_ERROR("wakeup_first",
                                grpc_wakeup_fd_wakeup(shared.wakeup_fd)));
@@ -293,14 +286,13 @@
   fd.read_fd = 0;
   grpc_wakeup_fd_destroy(&fd);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_fd_shutdown(&exec_ctx, shared.wakeup_desc, GRPC_ERROR_CANCELLED);
-    grpc_fd_orphan(&exec_ctx, shared.wakeup_desc, nullptr, nullptr,
+    grpc_core::ExecCtx exec_ctx;
+    grpc_fd_shutdown(shared.wakeup_desc, GRPC_ERROR_CANCELLED);
+    grpc_fd_orphan(shared.wakeup_desc, nullptr, nullptr,
                    false /* already_closed */, "done");
-    grpc_pollset_shutdown(&exec_ctx, shared.pollset,
+    grpc_pollset_shutdown(shared.pollset,
                           GRPC_CLOSURE_CREATE(destroy_pollset, shared.pollset,
                                               grpc_schedule_on_exec_ctx));
-    grpc_exec_ctx_finish(&exec_ctx);
   }
   gpr_free(shared.pollset);
 }
@@ -309,20 +301,21 @@
   const char* poll_strategy = nullptr;
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  {
+    grpc_core::ExecCtx exec_ctx;
 
-  poll_strategy = grpc_get_poll_strategy_name();
-  if (poll_strategy != nullptr && strcmp(poll_strategy, "epollsig") == 0) {
-    test_add_fd_to_pollset();
-    test_threading();
-  } else {
-    gpr_log(GPR_INFO,
-            "Skipping the test. The test is only relevant for 'epollsig' "
-            "strategy. and the current strategy is: '%s'",
-            poll_strategy);
+    poll_strategy = grpc_get_poll_strategy_name();
+    if (poll_strategy != nullptr && strcmp(poll_strategy, "epollsig") == 0) {
+      test_add_fd_to_pollset();
+      test_threading();
+    } else {
+      gpr_log(GPR_INFO,
+              "Skipping the test. The test is only relevant for 'epollsig' "
+              "strategy. and the current strategy is: '%s'",
+              poll_strategy);
+    }
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/fd_conservation_posix_test.cc b/test/core/iomgr/fd_conservation_posix_test.cc
index f46430c..aaa1401 100644
--- a/test/core/iomgr/fd_conservation_posix_test.cc
+++ b/test/core/iomgr/fd_conservation_posix_test.cc
@@ -31,26 +31,27 @@
 
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  {
+    grpc_core::ExecCtx exec_ctx;
 
-  /* set max # of file descriptors to a low value, and
-     verify we can create and destroy many more than this number
-     of descriptors */
-  rlim.rlim_cur = rlim.rlim_max = 10;
-  GPR_ASSERT(0 == setrlimit(RLIMIT_NOFILE, &rlim));
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("fd_conservation_posix_test");
+    /* set max # of file descriptors to a low value, and
+       verify we can create and destroy many more than this number
+       of descriptors */
+    rlim.rlim_cur = rlim.rlim_max = 10;
+    GPR_ASSERT(0 == setrlimit(RLIMIT_NOFILE, &rlim));
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("fd_conservation_posix_test");
 
-  for (i = 0; i < 100; i++) {
-    p = grpc_iomgr_create_endpoint_pair("test", nullptr);
-    grpc_endpoint_destroy(&exec_ctx, p.client);
-    grpc_endpoint_destroy(&exec_ctx, p.server);
-    grpc_exec_ctx_flush(&exec_ctx);
+    for (i = 0; i < 100; i++) {
+      p = grpc_iomgr_create_endpoint_pair("test", NULL);
+      grpc_endpoint_destroy(p.client);
+      grpc_endpoint_destroy(p.server);
+      grpc_core::ExecCtx::Get()->Flush();
+    }
+
+    grpc_resource_quota_unref(resource_quota);
   }
 
-  grpc_resource_quota_unref(resource_quota);
-
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/fd_posix_test.cc b/test/core/iomgr/fd_posix_test.cc
index a03d841..cf75517 100644
--- a/test/core/iomgr/fd_posix_test.cc
+++ b/test/core/iomgr/fd_posix_test.cc
@@ -111,20 +111,19 @@
 
 /* Called when an upload session can be safely shutdown.
    Close session FD and start to shutdown listen FD. */
-static void session_shutdown_cb(grpc_exec_ctx* exec_ctx, void* arg, /*session */
+static void session_shutdown_cb(void* arg, /*session */
                                 bool success) {
   session* se = static_cast<session*>(arg);
   server* sv = se->sv;
-  grpc_fd_orphan(exec_ctx, se->em_fd, nullptr, nullptr,
-                 false /* already_closed */, "a");
+  grpc_fd_orphan(se->em_fd, nullptr, nullptr, false /* already_closed */, "a");
   gpr_free(se);
   /* Start to shutdown listen fd. */
-  grpc_fd_shutdown(exec_ctx, sv->em_fd,
+  grpc_fd_shutdown(sv->em_fd,
                    GRPC_ERROR_CREATE_FROM_STATIC_STRING("session_shutdown_cb"));
 }
 
 /* Called when data become readable in a session. */
-static void session_read_cb(grpc_exec_ctx* exec_ctx, void* arg, /*session */
+static void session_read_cb(void* arg, /*session */
                             grpc_error* error) {
   session* se = static_cast<session*>(arg);
   int fd = grpc_fd_wrapped_fd(se->em_fd);
@@ -133,7 +132,7 @@
   ssize_t read_total = 0;
 
   if (error != GRPC_ERROR_NONE) {
-    session_shutdown_cb(exec_ctx, arg, 1);
+    session_shutdown_cb(arg, 1);
     return;
   }
 
@@ -148,7 +147,7 @@
      It is possible to read nothing due to spurious edge event or data has
      been drained, In such a case, read() returns -1 and set errno to EAGAIN. */
   if (read_once == 0) {
-    session_shutdown_cb(exec_ctx, arg, 1);
+    session_shutdown_cb(arg, 1);
   } else if (read_once == -1) {
     if (errno == EAGAIN) {
       /* An edge triggered event is cached in the kernel until next poll.
@@ -159,7 +158,7 @@
          TODO(chenw): in multi-threaded version, callback and polling can be
          run in different threads. polling may catch a persist read edge event
          before notify_on_read is called.  */
-      grpc_fd_notify_on_read(exec_ctx, se->em_fd, &se->session_read_closure);
+      grpc_fd_notify_on_read(se->em_fd, &se->session_read_closure);
     } else {
       gpr_log(GPR_ERROR, "Unhandled read error %s", strerror(errno));
       abort();
@@ -169,22 +168,20 @@
 
 /* Called when the listen FD can be safely shutdown.
    Close listen FD and signal that server can be shutdown. */
-static void listen_shutdown_cb(grpc_exec_ctx* exec_ctx, void* arg /*server */,
-                               int success) {
+static void listen_shutdown_cb(void* arg /*server */, int success) {
   server* sv = static_cast<server*>(arg);
 
-  grpc_fd_orphan(exec_ctx, sv->em_fd, nullptr, nullptr,
-                 false /* already_closed */, "b");
+  grpc_fd_orphan(sv->em_fd, nullptr, nullptr, false /* already_closed */, "b");
 
   gpr_mu_lock(g_mu);
   sv->done = 1;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
 /* Called when a new TCP connection request arrives in the listening port. */
-static void listen_cb(grpc_exec_ctx* exec_ctx, void* arg, /*=sv_arg*/
+static void listen_cb(void* arg, /*=sv_arg*/
                       grpc_error* error) {
   server* sv = static_cast<server*>(arg);
   int fd;
@@ -195,7 +192,7 @@
   grpc_fd* listen_em_fd = sv->em_fd;
 
   if (error != GRPC_ERROR_NONE) {
-    listen_shutdown_cb(exec_ctx, arg, 1);
+    listen_shutdown_cb(arg, 1);
     return;
   }
 
@@ -207,12 +204,12 @@
   se = static_cast<session*>(gpr_malloc(sizeof(*se)));
   se->sv = sv;
   se->em_fd = grpc_fd_create(fd, "listener");
-  grpc_pollset_add_fd(exec_ctx, g_pollset, se->em_fd);
+  grpc_pollset_add_fd(g_pollset, se->em_fd);
   GRPC_CLOSURE_INIT(&se->session_read_closure, session_read_cb, se,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_read(exec_ctx, se->em_fd, &se->session_read_closure);
+  grpc_fd_notify_on_read(se->em_fd, &se->session_read_closure);
 
-  grpc_fd_notify_on_read(exec_ctx, listen_em_fd, &sv->listen_closure);
+  grpc_fd_notify_on_read(listen_em_fd, &sv->listen_closure);
 }
 
 /* Max number of connections pending to be accepted by listen(). */
@@ -222,7 +219,7 @@
    listen_cb() is registered to be interested in reading from listen_fd.
    When connection request arrives, listen_cb() is called to accept the
    connection request. */
-static int server_start(grpc_exec_ctx* exec_ctx, server* sv) {
+static int server_start(server* sv) {
   int port = 0;
   int fd;
   struct sockaddr_in sin;
@@ -236,11 +233,11 @@
   GPR_ASSERT(listen(fd, MAX_NUM_FD) == 0);
 
   sv->em_fd = grpc_fd_create(fd, "server");
-  grpc_pollset_add_fd(exec_ctx, g_pollset, sv->em_fd);
+  grpc_pollset_add_fd(g_pollset, sv->em_fd);
   /* Register to be interested in reading from listen_fd. */
   GRPC_CLOSURE_INIT(&sv->listen_closure, listen_cb, sv,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_read(exec_ctx, sv->em_fd, &sv->listen_closure);
+  grpc_fd_notify_on_read(sv->em_fd, &sv->listen_closure);
 
   return port;
 }
@@ -249,13 +246,13 @@
 static void server_wait_and_shutdown(server* sv) {
   gpr_mu_lock(g_mu);
   while (!sv->done) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(g_pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -289,18 +286,16 @@
 }
 
 /* Called when a client upload session is ready to shutdown. */
-static void client_session_shutdown_cb(grpc_exec_ctx* exec_ctx,
-                                       void* arg /*client */, int success) {
+static void client_session_shutdown_cb(void* arg /*client */, int success) {
   client* cl = static_cast<client*>(arg);
-  grpc_fd_orphan(exec_ctx, cl->em_fd, nullptr, nullptr,
-                 false /* already_closed */, "c");
+  grpc_fd_orphan(cl->em_fd, nullptr, nullptr, false /* already_closed */, "c");
   cl->done = 1;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
 }
 
 /* Write as much as possible, then register notify_on_write. */
-static void client_session_write(grpc_exec_ctx* exec_ctx, void* arg, /*client */
+static void client_session_write(void* arg, /*client */
                                  grpc_error* error) {
   client* cl = static_cast<client*>(arg);
   int fd = grpc_fd_wrapped_fd(cl->em_fd);
@@ -308,7 +303,7 @@
 
   if (error != GRPC_ERROR_NONE) {
     gpr_mu_lock(g_mu);
-    client_session_shutdown_cb(exec_ctx, arg, 1);
+    client_session_shutdown_cb(arg, 1);
     gpr_mu_unlock(g_mu);
     return;
   }
@@ -323,10 +318,10 @@
     if (cl->client_write_cnt < CLIENT_TOTAL_WRITE_CNT) {
       GRPC_CLOSURE_INIT(&cl->write_closure, client_session_write, cl,
                         grpc_schedule_on_exec_ctx);
-      grpc_fd_notify_on_write(exec_ctx, cl->em_fd, &cl->write_closure);
+      grpc_fd_notify_on_write(cl->em_fd, &cl->write_closure);
       cl->client_write_cnt++;
     } else {
-      client_session_shutdown_cb(exec_ctx, arg, 1);
+      client_session_shutdown_cb(arg, 1);
     }
     gpr_mu_unlock(g_mu);
   } else {
@@ -336,7 +331,7 @@
 }
 
 /* Start a client to send a stream of bytes. */
-static void client_start(grpc_exec_ctx* exec_ctx, client* cl, int port) {
+static void client_start(client* cl, int port) {
   int fd;
   struct sockaddr_in sin;
   create_test_socket(port, &fd, &sin);
@@ -357,9 +352,9 @@
   }
 
   cl->em_fd = grpc_fd_create(fd, "client");
-  grpc_pollset_add_fd(exec_ctx, g_pollset, cl->em_fd);
+  grpc_pollset_add_fd(g_pollset, cl->em_fd);
 
-  client_session_write(exec_ctx, cl, GRPC_ERROR_NONE);
+  client_session_write(cl, GRPC_ERROR_NONE);
 }
 
 /* Wait for the signal to shutdown a client. */
@@ -367,12 +362,12 @@
   gpr_mu_lock(g_mu);
   while (!cl->done) {
     grpc_pollset_worker* worker = nullptr;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(g_pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
@@ -385,13 +380,13 @@
   server sv;
   client cl;
   int port;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   server_init(&sv);
-  port = server_start(&exec_ctx, &sv);
+  port = server_start(&sv);
   client_init(&cl);
-  client_start(&exec_ctx, &cl, port);
-  grpc_exec_ctx_finish(&exec_ctx);
+  client_start(&cl, port);
+
   client_wait_and_shutdown(&cl);
   server_wait_and_shutdown(&sv);
   GPR_ASSERT(sv.read_bytes_total == cl.write_bytes_total);
@@ -406,27 +401,25 @@
 
 void destroy_change_data(fd_change_data* fdc) {}
 
-static void first_read_callback(grpc_exec_ctx* exec_ctx,
-                                void* arg /* fd_change_data */,
+static void first_read_callback(void* arg /* fd_change_data */,
                                 grpc_error* error) {
   fd_change_data* fdc = static_cast<fd_change_data*>(arg);
 
   gpr_mu_lock(g_mu);
   fdc->cb_that_ran = first_read_callback;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
-static void second_read_callback(grpc_exec_ctx* exec_ctx,
-                                 void* arg /* fd_change_data */,
+static void second_read_callback(void* arg /* fd_change_data */,
                                  grpc_error* error) {
   fd_change_data* fdc = static_cast<fd_change_data*>(arg);
 
   gpr_mu_lock(g_mu);
   fdc->cb_that_ran = second_read_callback;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -443,7 +436,7 @@
   ssize_t result;
   grpc_closure first_closure;
   grpc_closure second_closure;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_CLOSURE_INIT(&first_closure, first_read_callback, &a,
                     grpc_schedule_on_exec_ctx);
@@ -460,10 +453,10 @@
   GPR_ASSERT(fcntl(sv[1], F_SETFL, flags | O_NONBLOCK) == 0);
 
   em_fd = grpc_fd_create(sv[0], "test_grpc_fd_change");
-  grpc_pollset_add_fd(&exec_ctx, g_pollset, em_fd);
+  grpc_pollset_add_fd(g_pollset, em_fd);
 
   /* Register the first callback, then make its FD readable */
-  grpc_fd_notify_on_read(&exec_ctx, em_fd, &first_closure);
+  grpc_fd_notify_on_read(em_fd, &first_closure);
   data = 0;
   result = write(sv[1], &data, 1);
   GPR_ASSERT(result == 1);
@@ -473,10 +466,10 @@
   while (a.cb_that_ran == nullptr) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(g_pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(a.cb_that_ran == first_read_callback);
@@ -488,7 +481,7 @@
 
   /* Now register a second callback with distinct change data, and do the same
      thing again. */
-  grpc_fd_notify_on_read(&exec_ctx, em_fd, &second_closure);
+  grpc_fd_notify_on_read(em_fd, &second_closure);
   data = 0;
   result = write(sv[1], &data, 1);
   GPR_ASSERT(result == 1);
@@ -497,44 +490,43 @@
   while (b.cb_that_ran == nullptr) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                          GRPC_MILLIS_INF_FUTURE)));
+        "pollset_work",
+        grpc_pollset_work(g_pollset, &worker, GRPC_MILLIS_INF_FUTURE)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   /* Except now we verify that second_read_callback ran instead */
   GPR_ASSERT(b.cb_that_ran == second_read_callback);
   gpr_mu_unlock(g_mu);
 
-  grpc_fd_orphan(&exec_ctx, em_fd, nullptr, nullptr, false /* already_closed */,
-                 "d");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_fd_orphan(em_fd, nullptr, nullptr, false /* already_closed */, "d");
+
   destroy_change_data(&a);
   destroy_change_data(&b);
   close(sv[1]);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
-  test_grpc_fd();
-  test_grpc_fd_change();
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_flush(&exec_ctx);
-  gpr_free(g_pollset);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
+    test_grpc_fd();
+    test_grpc_fd_change();
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+    grpc_core::ExecCtx::Get()->Flush();
+    gpr_free(g_pollset);
+  }
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/load_file_test.cc b/test/core/iomgr/load_file_test.cc
index 9f360ba..797d0ef 100644
--- a/test/core/iomgr/load_file_test.cc
+++ b/test/core/iomgr/load_file_test.cc
@@ -19,6 +19,7 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -152,9 +153,11 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_load_empty_file();
   test_load_failure();
   test_load_small_file();
   test_load_big_file();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/pollset_set_test.cc b/test/core/iomgr/pollset_set_test.cc
index 719eab9..f270791 100644
--- a/test/core/iomgr/pollset_set_test.cc
+++ b/test/core/iomgr/pollset_set_test.cc
@@ -47,11 +47,10 @@
   }
 }
 
-void cleanup_test_pollset_sets(grpc_exec_ctx* exec_ctx,
-                               test_pollset_set* pollset_sets,
+void cleanup_test_pollset_sets(test_pollset_set* pollset_sets,
                                const int num_pss) {
   for (int i = 0; i < num_pss; i++) {
-    grpc_pollset_set_destroy(exec_ctx, pollset_sets[i].pss);
+    grpc_pollset_set_destroy(pollset_sets[i].pss);
     pollset_sets[i].pss = nullptr;
   }
 }
@@ -73,21 +72,19 @@
   }
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
-static void cleanup_test_pollsets(grpc_exec_ctx* exec_ctx,
-                                  test_pollset* pollsets,
+static void cleanup_test_pollsets(test_pollset* pollsets,
                                   const int num_pollsets) {
   grpc_closure destroyed;
   for (int i = 0; i < num_pollsets; i++) {
     GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, pollsets[i].ps,
                       grpc_schedule_on_exec_ctx);
-    grpc_pollset_shutdown(exec_ctx, pollsets[i].ps, &destroyed);
+    grpc_pollset_shutdown(pollsets[i].ps, &destroyed);
 
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_free(pollsets[i].ps);
     pollsets[i].ps = nullptr;
   }
@@ -105,45 +102,43 @@
   grpc_closure on_readable;   /* Closure to call when this fd is readable */
 } test_fd;
 
-void on_readable(grpc_exec_ctx* exec_ctx, void* tfd, grpc_error* error) {
+void on_readable(void* tfd, grpc_error* error) {
   ((test_fd*)tfd)->is_on_readable_called = true;
 }
 
-static void reset_test_fd(grpc_exec_ctx* exec_ctx, test_fd* tfd) {
+static void reset_test_fd(test_fd* tfd) {
   tfd->is_on_readable_called = false;
 
   GRPC_CLOSURE_INIT(&tfd->on_readable, on_readable, tfd,
                     grpc_schedule_on_exec_ctx);
-  grpc_fd_notify_on_read(exec_ctx, tfd->fd, &tfd->on_readable);
+  grpc_fd_notify_on_read(tfd->fd, &tfd->on_readable);
 }
 
-static void init_test_fds(grpc_exec_ctx* exec_ctx, test_fd* tfds,
-                          const int num_fds) {
+static void init_test_fds(test_fd* tfds, const int num_fds) {
   for (int i = 0; i < num_fds; i++) {
     GPR_ASSERT(GRPC_ERROR_NONE == grpc_wakeup_fd_init(&tfds[i].wakeup_fd));
     tfds[i].fd = grpc_fd_create(GRPC_WAKEUP_FD_GET_READ_FD(&tfds[i].wakeup_fd),
                                 "test_fd");
-    reset_test_fd(exec_ctx, &tfds[i]);
+    reset_test_fd(&tfds[i]);
   }
 }
 
-static void cleanup_test_fds(grpc_exec_ctx* exec_ctx, test_fd* tfds,
-                             const int num_fds) {
+static void cleanup_test_fds(test_fd* tfds, const int num_fds) {
   int release_fd;
 
   for (int i = 0; i < num_fds; i++) {
-    grpc_fd_shutdown(exec_ctx, tfds[i].fd,
+    grpc_fd_shutdown(tfds[i].fd,
                      GRPC_ERROR_CREATE_FROM_STATIC_STRING("fd cleanup"));
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
 
     /* grpc_fd_orphan frees the memory allocated for grpc_fd. Normally it also
      * calls close() on the underlying fd. In our case, we are using
      * grpc_wakeup_fd and we would like to destroy it ourselves (by calling
      * grpc_wakeup_fd_destroy). To prevent grpc_fd from calling close() on the
      * underlying fd, call it with a non-NULL 'release_fd' parameter */
-    grpc_fd_orphan(exec_ctx, tfds[i].fd, nullptr, &release_fd,
-                   false /* already_closed */, "test_fd_cleanup");
-    grpc_exec_ctx_flush(exec_ctx);
+    grpc_fd_orphan(tfds[i].fd, nullptr, &release_fd, false /* already_closed */,
+                   "test_fd_cleanup");
+    grpc_core::ExecCtx::Get()->Flush();
 
     grpc_wakeup_fd_destroy(&tfds[i].wakeup_fd);
   }
@@ -155,8 +150,7 @@
   }
 }
 
-static void verify_readable_and_reset(grpc_exec_ctx* exec_ctx, test_fd* tfds,
-                                      const int num_fds) {
+static void verify_readable_and_reset(test_fd* tfds, const int num_fds) {
   for (int i = 0; i < num_fds; i++) {
     /* Verify that the on_readable callback was called */
     GPR_ASSERT(tfds[i].is_on_readable_called);
@@ -164,7 +158,7 @@
     /* Reset the tfd[i] structure */
     GPR_ASSERT(GRPC_ERROR_NONE ==
                grpc_wakeup_fd_consume_wakeup(&tfds[i].wakeup_fd));
-    reset_test_fd(exec_ctx, &tfds[i]);
+    reset_test_fd(&tfds[i]);
   }
 }
 
@@ -205,7 +199,7 @@
    *                    |
    *                    +---> FD9 (Added after PS2 is added to PSS0)
    */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_pollset_worker* worker;
   grpc_millis deadline;
 
@@ -216,34 +210,33 @@
   const int num_ps = GPR_ARRAY_SIZE(pollsets);
   const int num_pss = GPR_ARRAY_SIZE(pollset_sets);
 
-  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_fds(tfds, num_fds);
   init_test_pollsets(pollsets, num_ps);
   init_test_pollset_sets(pollset_sets, num_pss);
 
   /* Construct the pollset_set/pollset/fd tree (see diagram above) */
 
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+  grpc_pollset_set_add_fd(pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(pollset_sets[1].pss, tfds[1].fd);
 
-  grpc_pollset_add_fd(&exec_ctx, pollsets[0].ps, tfds[2].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[3].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[2].ps, tfds[4].fd);
+  grpc_pollset_add_fd(pollsets[0].ps, tfds[2].fd);
+  grpc_pollset_add_fd(pollsets[1].ps, tfds[3].fd);
+  grpc_pollset_add_fd(pollsets[2].ps, tfds[4].fd);
 
-  grpc_pollset_set_add_pollset_set(&exec_ctx, pollset_sets[0].pss,
-                                   pollset_sets[1].pss);
+  grpc_pollset_set_add_pollset_set(pollset_sets[0].pss, pollset_sets[1].pss);
 
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[1].pss, pollsets[0].ps);
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[1].ps);
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[2].ps);
+  grpc_pollset_set_add_pollset(pollset_sets[1].pss, pollsets[0].ps);
+  grpc_pollset_set_add_pollset(pollset_sets[0].pss, pollsets[1].ps);
+  grpc_pollset_set_add_pollset(pollset_sets[0].pss, pollsets[2].ps);
 
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[5].fd);
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[6].fd);
+  grpc_pollset_set_add_fd(pollset_sets[0].pss, tfds[5].fd);
+  grpc_pollset_set_add_fd(pollset_sets[1].pss, tfds[6].fd);
 
-  grpc_pollset_add_fd(&exec_ctx, pollsets[0].ps, tfds[7].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[8].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[2].ps, tfds[9].fd);
+  grpc_pollset_add_fd(pollsets[0].ps, tfds[7].fd);
+  grpc_pollset_add_fd(pollsets[1].ps, tfds[8].fd);
+  grpc_pollset_add_fd(pollsets[2].ps, tfds[9].fd);
 
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Test that if any FD in the above structure is readable, it is observable by
    * doing grpc_pollset_work on any pollset
@@ -263,34 +256,32 @@
     deadline = grpc_timespec_to_millis_round_up(
         grpc_timeout_milliseconds_to_deadline(2));
     GPR_ASSERT(GRPC_ERROR_NONE ==
-               grpc_pollset_work(&exec_ctx, pollsets[i].ps, &worker, deadline));
+               grpc_pollset_work(pollsets[i].ps, &worker, deadline));
     gpr_mu_unlock(pollsets[i].mu);
 
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
 
-    verify_readable_and_reset(&exec_ctx, tfds, num_fds);
-    grpc_exec_ctx_flush(&exec_ctx);
+    verify_readable_and_reset(tfds, num_fds);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
   /* Test tear down */
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[5].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[6].fd);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_pollset_set_del_fd(pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(pollset_sets[0].pss, tfds[5].fd);
+  grpc_pollset_set_del_fd(pollset_sets[1].pss, tfds[1].fd);
+  grpc_pollset_set_del_fd(pollset_sets[1].pss, tfds[6].fd);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[1].pss, pollsets[0].ps);
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[1].ps);
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[2].ps);
+  grpc_pollset_set_del_pollset(pollset_sets[1].pss, pollsets[0].ps);
+  grpc_pollset_set_del_pollset(pollset_sets[0].pss, pollsets[1].ps);
+  grpc_pollset_set_del_pollset(pollset_sets[0].pss, pollsets[2].ps);
 
-  grpc_pollset_set_del_pollset_set(&exec_ctx, pollset_sets[0].pss,
-                                   pollset_sets[1].pss);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_pollset_set_del_pollset_set(pollset_sets[0].pss, pollset_sets[1].pss);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  cleanup_test_fds(&exec_ctx, tfds, num_fds);
-  cleanup_test_pollsets(&exec_ctx, pollsets, num_ps);
-  cleanup_test_pollset_sets(&exec_ctx, pollset_sets, num_pss);
-  grpc_exec_ctx_finish(&exec_ctx);
+  cleanup_test_fds(tfds, num_fds);
+  cleanup_test_pollsets(pollsets, num_ps);
+  cleanup_test_pollset_sets(pollset_sets, num_pss);
 }
 
 /* Same FD added multiple times to the pollset_set tree */
@@ -310,7 +301,7 @@
    *                    |           +--> FD2
    *                    +---> FD1
    */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_pollset_worker* worker;
   grpc_millis deadline;
 
@@ -321,21 +312,20 @@
   const int num_ps = 1;
   const int num_pss = GPR_ARRAY_SIZE(pollset_sets);
 
-  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_fds(tfds, num_fds);
   init_test_pollsets(&pollset, num_ps);
   init_test_pollset_sets(pollset_sets, num_pss);
 
   /* Construct the structure */
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[0].fd);
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+  grpc_pollset_set_add_fd(pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(pollset_sets[1].pss, tfds[0].fd);
+  grpc_pollset_set_add_fd(pollset_sets[1].pss, tfds[1].fd);
 
-  grpc_pollset_add_fd(&exec_ctx, pollset.ps, tfds[1].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollset.ps, tfds[2].fd);
+  grpc_pollset_add_fd(pollset.ps, tfds[1].fd);
+  grpc_pollset_add_fd(pollset.ps, tfds[2].fd);
 
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[1].pss, pollset.ps);
-  grpc_pollset_set_add_pollset_set(&exec_ctx, pollset_sets[0].pss,
-                                   pollset_sets[1].pss);
+  grpc_pollset_set_add_pollset(pollset_sets[1].pss, pollset.ps);
+  grpc_pollset_set_add_pollset_set(pollset_sets[0].pss, pollset_sets[1].pss);
 
   /* Test. Make all FDs readable and make sure that can be observed by doing a
    * grpc_pollset_work on the pollset 'PS' */
@@ -345,27 +335,25 @@
   deadline = grpc_timespec_to_millis_round_up(
       grpc_timeout_milliseconds_to_deadline(2));
   GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_pollset_work(&exec_ctx, pollset.ps, &worker, deadline));
+             grpc_pollset_work(pollset.ps, &worker, deadline));
   gpr_mu_unlock(pollset.mu);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  verify_readable_and_reset(&exec_ctx, tfds, num_fds);
-  grpc_exec_ctx_flush(&exec_ctx);
+  verify_readable_and_reset(tfds, num_fds);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Tear down */
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[0].fd);
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
+  grpc_pollset_set_del_fd(pollset_sets[0].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(pollset_sets[1].pss, tfds[0].fd);
+  grpc_pollset_set_del_fd(pollset_sets[1].pss, tfds[1].fd);
 
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[1].pss, pollset.ps);
-  grpc_pollset_set_del_pollset_set(&exec_ctx, pollset_sets[0].pss,
-                                   pollset_sets[1].pss);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_pollset_set_del_pollset(pollset_sets[1].pss, pollset.ps);
+  grpc_pollset_set_del_pollset_set(pollset_sets[0].pss, pollset_sets[1].pss);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  cleanup_test_fds(&exec_ctx, tfds, num_fds);
-  cleanup_test_pollsets(&exec_ctx, &pollset, num_ps);
-  cleanup_test_pollset_sets(&exec_ctx, pollset_sets, num_pss);
-  grpc_exec_ctx_finish(&exec_ctx);
+  cleanup_test_fds(tfds, num_fds);
+  cleanup_test_pollsets(&pollset, num_ps);
+  cleanup_test_pollset_sets(pollset_sets, num_pss);
 }
 
 /* Pollset_set with an empty pollset */
@@ -383,7 +371,7 @@
    *                   |
    *                   +---> FD2
    */
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_pollset_worker* worker;
   grpc_millis deadline;
 
@@ -394,17 +382,17 @@
   const int num_ps = GPR_ARRAY_SIZE(pollsets);
   const int num_pss = 1;
 
-  init_test_fds(&exec_ctx, tfds, num_fds);
+  init_test_fds(tfds, num_fds);
   init_test_pollsets(pollsets, num_ps);
   init_test_pollset_sets(&pollset_set, num_pss);
 
   /* Construct the structure */
-  grpc_pollset_set_add_fd(&exec_ctx, pollset_set.pss, tfds[0].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[1].fd);
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[2].fd);
+  grpc_pollset_set_add_fd(pollset_set.pss, tfds[0].fd);
+  grpc_pollset_add_fd(pollsets[1].ps, tfds[1].fd);
+  grpc_pollset_add_fd(pollsets[1].ps, tfds[2].fd);
 
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_set.pss, pollsets[0].ps);
-  grpc_pollset_set_add_pollset(&exec_ctx, pollset_set.pss, pollsets[1].ps);
+  grpc_pollset_set_add_pollset(pollset_set.pss, pollsets[0].ps);
+  grpc_pollset_set_add_pollset(pollset_set.pss, pollsets[1].ps);
 
   /* Test. Make all FDs readable and make sure that can be observed by doing
    * grpc_pollset_work on the empty pollset 'PS0' */
@@ -414,45 +402,44 @@
   deadline = grpc_timespec_to_millis_round_up(
       grpc_timeout_milliseconds_to_deadline(2));
   GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_pollset_work(&exec_ctx, pollsets[0].ps, &worker, deadline));
+             grpc_pollset_work(pollsets[0].ps, &worker, deadline));
   gpr_mu_unlock(pollsets[0].mu);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  verify_readable_and_reset(&exec_ctx, tfds, num_fds);
-  grpc_exec_ctx_flush(&exec_ctx);
+  verify_readable_and_reset(tfds, num_fds);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Tear down */
-  grpc_pollset_set_del_fd(&exec_ctx, pollset_set.pss, tfds[0].fd);
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_set.pss, pollsets[0].ps);
-  grpc_pollset_set_del_pollset(&exec_ctx, pollset_set.pss, pollsets[1].ps);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_pollset_set_del_fd(pollset_set.pss, tfds[0].fd);
+  grpc_pollset_set_del_pollset(pollset_set.pss, pollsets[0].ps);
+  grpc_pollset_set_del_pollset(pollset_set.pss, pollsets[1].ps);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  cleanup_test_fds(&exec_ctx, tfds, num_fds);
-  cleanup_test_pollsets(&exec_ctx, pollsets, num_ps);
-  cleanup_test_pollset_sets(&exec_ctx, &pollset_set, num_pss);
-  grpc_exec_ctx_finish(&exec_ctx);
+  cleanup_test_fds(tfds, num_fds);
+  cleanup_test_pollsets(pollsets, num_ps);
+  cleanup_test_pollset_sets(&pollset_set, num_pss);
 }
 
 int main(int argc, char** argv) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  const char* poll_strategy = grpc_get_poll_strategy_name();
+  {
+    grpc_core::ExecCtx exec_ctx;
+    const char* poll_strategy = grpc_get_poll_strategy_name();
 
-  if (poll_strategy != nullptr &&
-      (strcmp(poll_strategy, "epollsig") == 0 ||
-       strcmp(poll_strategy, "epoll-threadpool") == 0)) {
-    pollset_set_test_basic();
-    pollset_set_test_dup_fds();
-    pollset_set_test_empty_pollset();
-  } else {
-    gpr_log(GPR_INFO,
-            "Skipping the test. The test is only relevant for 'epoll' "
-            "strategy. and the current strategy is: '%s'",
-            poll_strategy);
+    if (poll_strategy != nullptr &&
+        (strcmp(poll_strategy, "epollsig") == 0 ||
+         strcmp(poll_strategy, "epoll-threadpool") == 0)) {
+      pollset_set_test_basic();
+      pollset_set_test_dup_fds();
+      pollset_set_test_empty_pollset();
+    } else {
+      gpr_log(GPR_INFO,
+              "Skipping the test. The test is only relevant for 'epoll' "
+              "strategy. and the current strategy is: '%s'",
+              poll_strategy);
+    }
   }
-
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/resolve_address_posix_test.cc b/test/core/iomgr/resolve_address_posix_test.cc
index 1a5eb9a..e363153 100644
--- a/test/core/iomgr/resolve_address_posix_test.cc
+++ b/test/core/iomgr/resolve_address_posix_test.cc
@@ -46,29 +46,29 @@
   grpc_pollset_set* pollset_set;
 } args_struct;
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
-void args_init(grpc_exec_ctx* exec_ctx, args_struct* args) {
+void args_init(args_struct* args) {
   gpr_event_init(&args->ev);
   args->pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args->pollset, &args->mu);
   args->pollset_set = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
+  grpc_pollset_set_add_pollset(args->pollset_set, args->pollset);
   args->addrs = nullptr;
 }
 
-void args_finish(grpc_exec_ctx* exec_ctx, args_struct* args) {
+void args_finish(args_struct* args) {
   GPR_ASSERT(gpr_event_wait(&args->ev, test_deadline()));
   grpc_resolved_addresses_destroy(args->addrs);
-  grpc_pollset_set_del_pollset(exec_ctx, args->pollset_set, args->pollset);
-  grpc_pollset_set_destroy(exec_ctx, args->pollset_set);
+  grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
+  grpc_pollset_set_destroy(args->pollset_set);
   grpc_closure do_nothing_cb;
   GRPC_CLOSURE_INIT(&do_nothing_cb, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(exec_ctx, args->pollset, &do_nothing_cb);
+  grpc_pollset_shutdown(args->pollset, &do_nothing_cb);
   // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
-  grpc_exec_ctx_flush(exec_ctx);
-  grpc_pollset_destroy(exec_ctx, args->pollset);
+  grpc_core::ExecCtx::Get()->Flush();
+  grpc_pollset_destroy(args->pollset);
   gpr_free(args->pollset);
 }
 
@@ -79,36 +79,33 @@
 
 static void actually_poll(void* argsp) {
   args_struct* args = static_cast<args_struct*>(argsp);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_millis deadline = n_sec_deadline(10);
   while (true) {
+    grpc_core::ExecCtx exec_ctx;
     bool done = gpr_atm_acq_load(&args->done_atm) != 0;
     if (done) {
       break;
     }
-    grpc_millis time_left = deadline - grpc_exec_ctx_now(&exec_ctx);
+    grpc_millis time_left = deadline - grpc_core::ExecCtx::Get()->Now();
     gpr_log(GPR_DEBUG, "done=%d, time_left=%" PRIdPTR, done, time_left);
     GPR_ASSERT(time_left >= 0);
     grpc_pollset_worker* worker = nullptr;
     gpr_mu_lock(args->mu);
-    GRPC_LOG_IF_ERROR("pollset_work",
-                      grpc_pollset_work(&exec_ctx, args->pollset, &worker,
-                                        n_sec_deadline(1)));
+    GRPC_LOG_IF_ERROR("pollset_work", grpc_pollset_work(args->pollset, &worker,
+                                                        n_sec_deadline(1)));
     gpr_mu_unlock(args->mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
   gpr_event_set(&args->ev, (void*)1);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void poll_pollset_until_request_done(args_struct* args) {
   gpr_atm_rel_store(&args->done_atm, 0);
   gpr_thd_id id;
-  gpr_thd_new(&id, actually_poll, args, nullptr);
+  gpr_thd_new(&id, "grpc_poll_pollset", actually_poll, args, nullptr);
 }
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* argsp,
-                         grpc_error* err) {
+static void must_succeed(void* argsp, grpc_error* err) {
   args_struct* args = static_cast<args_struct*>(argsp);
   GPR_ASSERT(err == GRPC_ERROR_NONE);
   GPR_ASSERT(args->addrs != nullptr);
@@ -116,29 +113,28 @@
   gpr_atm_rel_store(&args->done_atm, 1);
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* argsp, grpc_error* err) {
+static void must_fail(void* argsp, grpc_error* err) {
   args_struct* args = static_cast<args_struct*>(argsp);
   GPR_ASSERT(err != GRPC_ERROR_NONE);
   gpr_atm_rel_store(&args->done_atm, 1);
 }
 
 static void test_unix_socket(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   poll_pollset_until_request_done(&args);
   grpc_resolve_address(
-      &exec_ctx, "unix:/path/name", nullptr, args.pollset_set,
+      "unix:/path/name", nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_unix_socket_path_name_too_long(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   const char prefix[] = "unix:/path/name";
   size_t path_name_length =
       GPR_ARRAY_SIZE(((struct sockaddr_un*)nullptr)->sun_path) + 6;
@@ -150,22 +146,23 @@
 
   poll_pollset_until_request_done(&args);
   grpc_resolve_address(
-      &exec_ctx, path_name, nullptr, args.pollset_set,
+      path_name, nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
   gpr_free(path_name);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  test_unix_socket();
-  test_unix_socket_path_name_too_long();
-  grpc_executor_shutdown(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+
+  {
+    grpc_core::ExecCtx exec_ctx;
+    test_unix_socket();
+    test_unix_socket_path_name_too_long();
+  }
+
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/resolve_address_test.cc b/test/core/iomgr/resolve_address_test.cc
index 1c5aa38..a0dc484 100644
--- a/test/core/iomgr/resolve_address_test.cc
+++ b/test/core/iomgr/resolve_address_test.cc
@@ -39,32 +39,32 @@
   grpc_pollset_set* pollset_set;
 } args_struct;
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
-void args_init(grpc_exec_ctx* exec_ctx, args_struct* args) {
+void args_init(args_struct* args) {
   gpr_event_init(&args->ev);
   args->pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args->pollset, &args->mu);
   args->pollset_set = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
+  grpc_pollset_set_add_pollset(args->pollset_set, args->pollset);
   args->addrs = nullptr;
   gpr_atm_rel_store(&args->done_atm, 0);
 }
 
-void args_finish(grpc_exec_ctx* exec_ctx, args_struct* args) {
+void args_finish(args_struct* args) {
   GPR_ASSERT(gpr_event_wait(&args->ev, test_deadline()));
   grpc_resolved_addresses_destroy(args->addrs);
-  grpc_pollset_set_del_pollset(exec_ctx, args->pollset_set, args->pollset);
-  grpc_pollset_set_destroy(exec_ctx, args->pollset_set);
+  grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
+  grpc_pollset_set_destroy(args->pollset_set);
   grpc_closure do_nothing_cb;
   GRPC_CLOSURE_INIT(&do_nothing_cb, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
   gpr_mu_lock(args->mu);
-  grpc_pollset_shutdown(exec_ctx, args->pollset, &do_nothing_cb);
+  grpc_pollset_shutdown(args->pollset, &do_nothing_cb);
   gpr_mu_unlock(args->mu);
   // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
-  grpc_exec_ctx_flush(exec_ctx);
-  grpc_pollset_destroy(exec_ctx, args->pollset);
+  grpc_core::ExecCtx::Get()->Flush();
+  grpc_pollset_destroy(args->pollset);
   gpr_free(args->pollset);
 }
 
@@ -74,119 +74,109 @@
 }
 
 static void poll_pollset_until_request_done(args_struct* args) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_millis deadline = n_sec_deadline(10);
   while (true) {
     bool done = gpr_atm_acq_load(&args->done_atm) != 0;
     if (done) {
       break;
     }
-    grpc_millis time_left = deadline - grpc_exec_ctx_now(&exec_ctx);
+    grpc_millis time_left = deadline - grpc_core::ExecCtx::Get()->Now();
     gpr_log(GPR_DEBUG, "done=%d, time_left=%" PRIdPTR, done, time_left);
     GPR_ASSERT(time_left >= 0);
     grpc_pollset_worker* worker = nullptr;
     gpr_mu_lock(args->mu);
-    GRPC_LOG_IF_ERROR("pollset_work",
-                      grpc_pollset_work(&exec_ctx, args->pollset, &worker,
-                                        n_sec_deadline(1)));
+    GRPC_LOG_IF_ERROR("pollset_work", grpc_pollset_work(args->pollset, &worker,
+                                                        n_sec_deadline(1)));
     gpr_mu_unlock(args->mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
   gpr_event_set(&args->ev, (void*)1);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* argsp,
-                         grpc_error* err) {
+static void must_succeed(void* argsp, grpc_error* err) {
   args_struct* args = static_cast<args_struct*>(argsp);
   GPR_ASSERT(err == GRPC_ERROR_NONE);
   GPR_ASSERT(args->addrs != nullptr);
   GPR_ASSERT(args->addrs->naddrs > 0);
   gpr_atm_rel_store(&args->done_atm, 1);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, args->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr));
   gpr_mu_unlock(args->mu);
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* argsp, grpc_error* err) {
+static void must_fail(void* argsp, grpc_error* err) {
   args_struct* args = static_cast<args_struct*>(argsp);
   GPR_ASSERT(err != GRPC_ERROR_NONE);
   gpr_atm_rel_store(&args->done_atm, 1);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, args->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr));
   gpr_mu_unlock(args->mu);
 }
 
 static void test_localhost(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "localhost:1", nullptr, args.pollset_set,
+      "localhost:1", nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_default_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "localhost", "1", args.pollset_set,
+      "localhost", "1", args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_non_numeric_default_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "localhost", "https", args.pollset_set,
+      "localhost", "https", args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_missing_default_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "localhost", nullptr, args.pollset_set,
+      "localhost", nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_ipv6_with_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   args_struct args;
-  args_init(&exec_ctx, &args);
+  args_init(&args);
   grpc_resolve_address(
-      &exec_ctx, "[2001:db8::1]:1", nullptr, args.pollset_set,
+      "[2001:db8::1]:1", nullptr, args.pollset_set,
       GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
       &args.addrs);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   poll_pollset_until_request_done(&args);
-  args_finish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  args_finish(&args);
 }
 
 static void test_ipv6_without_port(void) {
@@ -197,17 +187,16 @@
   };
   unsigned i;
   for (i = 0; i < sizeof(kCases) / sizeof(*kCases); i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     args_struct args;
-    args_init(&exec_ctx, &args);
+    args_init(&args);
     grpc_resolve_address(
-        &exec_ctx, kCases[i], "80", args.pollset_set,
+        kCases[i], "80", args.pollset_set,
         GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
         &args.addrs);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     poll_pollset_until_request_done(&args);
-    args_finish(&exec_ctx, &args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    args_finish(&args);
   }
 }
 
@@ -218,17 +207,16 @@
   };
   unsigned i;
   for (i = 0; i < sizeof(kCases) / sizeof(*kCases); i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     args_struct args;
-    args_init(&exec_ctx, &args);
+    args_init(&args);
     grpc_resolve_address(
-        &exec_ctx, kCases[i], nullptr, args.pollset_set,
+        kCases[i], nullptr, args.pollset_set,
         GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
         &args.addrs);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     poll_pollset_until_request_done(&args);
-    args_finish(&exec_ctx, &args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    args_finish(&args);
   }
 }
 
@@ -238,34 +226,35 @@
   };
   unsigned i;
   for (i = 0; i < sizeof(kCases) / sizeof(*kCases); i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     args_struct args;
-    args_init(&exec_ctx, &args);
+    args_init(&args);
     grpc_resolve_address(
-        &exec_ctx, kCases[i], "1", args.pollset_set,
+        kCases[i], "1", args.pollset_set,
         GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
         &args.addrs);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     poll_pollset_until_request_done(&args);
-    args_finish(&exec_ctx, &args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    args_finish(&args);
   }
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  test_localhost();
-  test_default_port();
-  test_non_numeric_default_port();
-  test_missing_default_port();
-  test_ipv6_with_port();
-  test_ipv6_without_port();
-  test_invalid_ip_addresses();
-  test_unparseable_hostports();
-  grpc_executor_shutdown(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    test_localhost();
+    test_default_port();
+    test_non_numeric_default_port();
+    test_missing_default_port();
+    test_ipv6_with_port();
+    test_ipv6_without_port();
+    test_invalid_ip_addresses();
+    test_unparseable_hostports();
+    grpc_executor_shutdown();
+  }
+
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/resource_quota_test.cc b/test/core/iomgr/resource_quota_test.cc
index 6851702..ae26f72 100644
--- a/test/core/iomgr/resource_quota_test.cc
+++ b/test/core/iomgr/resource_quota_test.cc
@@ -27,7 +27,7 @@
 gpr_mu g_mu;
 gpr_cv g_cv;
 
-static void inc_int_cb(grpc_exec_ctx* exec_ctx, void* a, grpc_error* error) {
+static void inc_int_cb(void* a, grpc_error* error) {
   gpr_mu_lock(&g_mu);
   ++*(int*)a;
   gpr_cv_signal(&g_cv);
@@ -43,7 +43,7 @@
   gpr_mu_unlock(&g_mu);
 }
 
-static void set_event_cb(grpc_exec_ctx* exec_ctx, void* a, grpc_error* error) {
+static void set_event_cb(void* a, grpc_error* error) {
   gpr_event_set((gpr_event*)a, (void*)1);
 }
 grpc_closure* set_event(gpr_event* ev) {
@@ -56,13 +56,12 @@
   grpc_closure* then;
 } reclaimer_args;
 
-static void reclaimer_cb(grpc_exec_ctx* exec_ctx, void* args,
-                         grpc_error* error) {
+static void reclaimer_cb(void* args, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   reclaimer_args* a = static_cast<reclaimer_args*>(args);
-  grpc_resource_user_free(exec_ctx, a->resource_user, a->size);
-  grpc_resource_user_finish_reclamation(exec_ctx, a->resource_user);
-  GRPC_CLOSURE_RUN(exec_ctx, a->then, GRPC_ERROR_NONE);
+  grpc_resource_user_free(a->resource_user, a->size);
+  grpc_resource_user_finish_reclamation(a->resource_user);
+  GRPC_CLOSURE_RUN(a->then, GRPC_ERROR_NONE);
   gpr_free(a);
 }
 
@@ -75,10 +74,9 @@
   return GRPC_CLOSURE_CREATE(reclaimer_cb, a, grpc_schedule_on_exec_ctx);
 }
 
-static void unused_reclaimer_cb(grpc_exec_ctx* exec_ctx, void* arg,
-                                grpc_error* error) {
+static void unused_reclaimer_cb(void* arg, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_CANCELLED);
-  GRPC_CLOSURE_RUN(exec_ctx, static_cast<grpc_closure*>(arg), GRPC_ERROR_NONE);
+  GRPC_CLOSURE_RUN(static_cast<grpc_closure*>(arg), GRPC_ERROR_NONE);
 }
 grpc_closure* make_unused_reclaimer(grpc_closure* then) {
   return GRPC_CLOSURE_CREATE(unused_reclaimer_cb, then,
@@ -86,9 +84,8 @@
 }
 
 static void destroy_user(grpc_resource_user* usr) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_resource_user_unref(&exec_ctx, usr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_resource_user_unref(usr);
 }
 
 static void test_no_op(void) {
@@ -120,14 +117,12 @@
   grpc_resource_quota_resize(q, 1024 * 1024);
   grpc_resource_user* usr = grpc_resource_user_create(q, "usr");
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, nullptr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, NULL);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -140,10 +135,9 @@
   grpc_resource_quota_resize(q, 1024 * 1024);
   grpc_resource_user* usr = grpc_resource_user_create(q, "usr");
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, nullptr);
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, NULL);
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -158,16 +152,15 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -182,9 +175,9 @@
   gpr_event ev;
   gpr_event_init(&ev);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(
                    &ev, grpc_timeout_milliseconds_to_deadline(100)) == nullptr);
   }
@@ -193,9 +186,8 @@
              nullptr);
   ;
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -210,32 +202,30 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr1, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr1, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr1, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr1, 1024);
   }
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr2, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr2, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr2, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr2, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr1);
@@ -251,33 +241,32 @@
   gpr_event ev;
   {
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr1, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr1, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr2, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr2, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(
                    &ev, grpc_timeout_milliseconds_to_deadline(100)) == nullptr);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr1, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr1, 1024);
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr2, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr2, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr1);
@@ -293,9 +282,9 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
@@ -303,18 +292,16 @@
   gpr_event reclaim_done;
   gpr_event_init(&reclaim_done);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, false,
-        make_reclaimer(usr, 1024, set_event(&reclaim_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, false, make_reclaimer(usr, 1024, set_event(&reclaim_done)));
   }
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&reclaim_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
@@ -322,9 +309,8 @@
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -340,9 +326,9 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr1, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr1, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
@@ -350,18 +336,16 @@
   gpr_event reclaim_done;
   gpr_event_init(&reclaim_done);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr1, false,
-        make_reclaimer(usr1, 1024, set_event(&reclaim_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr1, false, make_reclaimer(usr1, 1024, set_event(&reclaim_done)));
   }
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr2, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr2, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&reclaim_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
@@ -369,9 +353,8 @@
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr2, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr2, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr1);
@@ -387,9 +370,9 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
@@ -397,18 +380,16 @@
   gpr_event reclaim_done;
   gpr_event_init(&reclaim_done);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, true,
-        make_reclaimer(usr, 1024, set_event(&reclaim_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, true, make_reclaimer(usr, 1024, set_event(&reclaim_done)));
   }
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&reclaim_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
@@ -416,9 +397,8 @@
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -435,13 +415,12 @@
   gpr_event destructive_done;
   gpr_event_init(&destructive_done);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, false, make_unused_reclaimer(set_event(&benign_done)));
+        usr, false, make_unused_reclaimer(set_event(&benign_done)));
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, true,
-        make_unused_reclaimer(set_event(&destructive_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, true, make_unused_reclaimer(set_event(&destructive_done)));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_milliseconds_to_deadline(100)) ==
                nullptr);
@@ -470,22 +449,20 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, false,
-        make_reclaimer(usr, 1024, set_event(&benign_done)));
+        usr, false, make_reclaimer(usr, 1024, set_event(&benign_done)));
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, true,
-        make_unused_reclaimer(set_event(&destructive_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, true, make_unused_reclaimer(set_event(&destructive_done)));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_milliseconds_to_deadline(100)) ==
                nullptr);
@@ -496,9 +473,9 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&destructive_done,
@@ -508,9 +485,8 @@
                nullptr);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -533,22 +509,20 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(5)) !=
                nullptr);
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, false,
-        make_reclaimer(usr, 512, set_event(&benign_done)));
+        usr, false, make_reclaimer(usr, 512, set_event(&benign_done)));
     grpc_resource_user_post_reclaimer(
-        &exec_ctx, usr, true,
-        make_reclaimer(usr, 512, set_event(&destructive_done)));
-    grpc_exec_ctx_finish(&exec_ctx);
+        usr, true, make_reclaimer(usr, 512, set_event(&destructive_done)));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_milliseconds_to_deadline(100)) ==
                nullptr);
@@ -559,9 +533,9 @@
   {
     gpr_event ev;
     gpr_event_init(&ev);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&ev));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&ev));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&benign_done,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
     GPR_ASSERT(gpr_event_wait(&destructive_done,
@@ -571,9 +545,8 @@
     ;
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   grpc_resource_quota_unref(q);
   destroy_user(usr);
@@ -591,20 +564,17 @@
   grpc_resource_quota_resize(q, 1024 * 1024);
   grpc_resource_user* usr = grpc_resource_user_create(q, "usr");
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, nullptr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, NULL);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_resource_quota_unref(q);
-    grpc_resource_user_unref(&exec_ctx, usr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_resource_user_unref(usr);
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
 }
 
@@ -624,11 +594,10 @@
     gpr_event reclaimer_cancelled;
     gpr_event_init(&reclaimer_cancelled);
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+      grpc_core::ExecCtx exec_ctx;
       grpc_resource_user_post_reclaimer(
-          &exec_ctx, usr, false,
-          make_unused_reclaimer(set_event(&reclaimer_cancelled)));
-      grpc_exec_ctx_finish(&exec_ctx);
+          usr, false, make_unused_reclaimer(set_event(&reclaimer_cancelled)));
+      grpc_core::ExecCtx::Get()->Flush();
       GPR_ASSERT(gpr_event_wait(&reclaimer_cancelled,
                                 grpc_timeout_milliseconds_to_deadline(100)) ==
                  nullptr);
@@ -636,27 +605,27 @@
     {
       gpr_event allocated;
       gpr_event_init(&allocated);
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&allocated));
-      grpc_exec_ctx_finish(&exec_ctx);
-      GPR_ASSERT(gpr_event_wait(&allocated, grpc_timeout_seconds_to_deadline(
-                                                5)) != nullptr);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_resource_user_alloc(usr, 1024, set_event(&allocated));
+      grpc_core::ExecCtx::Get()->Flush();
+      GPR_ASSERT(gpr_event_wait(&allocated,
+                                grpc_timeout_seconds_to_deadline(5)) != NULL);
       GPR_ASSERT(gpr_event_wait(&reclaimer_cancelled,
                                 grpc_timeout_milliseconds_to_deadline(100)) ==
                  nullptr);
     }
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_resource_user_unref(&exec_ctx, usr);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_resource_user_unref(usr);
+      grpc_core::ExecCtx::Get()->Flush();
       GPR_ASSERT(gpr_event_wait(&reclaimer_cancelled,
                                 grpc_timeout_milliseconds_to_deadline(100)) ==
                  nullptr);
     }
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_resource_user_free(&exec_ctx, usr, 1024);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_resource_user_free(usr, 1024);
+      grpc_core::ExecCtx::Get()->Flush();
       GPR_ASSERT(gpr_event_wait(&reclaimer_cancelled,
                                 grpc_timeout_seconds_to_deadline(5)) !=
                  nullptr);
@@ -674,9 +643,9 @@
   {
     gpr_event allocated;
     gpr_event_init(&allocated);
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&allocated));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc(usr, 1024, set_event(&allocated));
+    grpc_core::ExecCtx::Get()->Flush();
     GPR_ASSERT(gpr_event_wait(&allocated,
                               grpc_timeout_seconds_to_deadline(5)) != nullptr);
   }
@@ -684,11 +653,10 @@
     gpr_event reclaimer_done;
     gpr_event_init(&reclaimer_done);
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+      grpc_core::ExecCtx exec_ctx;
       grpc_resource_user_post_reclaimer(
-          &exec_ctx, usr, false,
-          make_reclaimer(usr, 1024, set_event(&reclaimer_done)));
-      grpc_exec_ctx_finish(&exec_ctx);
+          usr, false, make_reclaimer(usr, 1024, set_event(&reclaimer_done)));
+      grpc_core::ExecCtx::Get()->Flush();
       GPR_ASSERT(gpr_event_wait(&reclaimer_done,
                                 grpc_timeout_milliseconds_to_deadline(100)) ==
                  nullptr);
@@ -696,20 +664,19 @@
     {
       gpr_event allocated;
       gpr_event_init(&allocated);
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      grpc_resource_user_alloc(&exec_ctx, usr, 1024, set_event(&allocated));
-      grpc_exec_ctx_finish(&exec_ctx);
-      GPR_ASSERT(gpr_event_wait(&allocated, grpc_timeout_seconds_to_deadline(
-                                                5)) != nullptr);
+      grpc_core::ExecCtx exec_ctx;
+      grpc_resource_user_alloc(usr, 1024, set_event(&allocated));
+      grpc_core::ExecCtx::Get()->Flush();
+      GPR_ASSERT(gpr_event_wait(&allocated,
+                                grpc_timeout_seconds_to_deadline(5)) != NULL);
       GPR_ASSERT(gpr_event_wait(&reclaimer_done,
                                 grpc_timeout_seconds_to_deadline(5)) !=
                  nullptr);
     }
   }
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_free(&exec_ctx, usr, 1024);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_free(usr, 1024);
   }
   destroy_user(usr);
   grpc_resource_quota_unref(q);
@@ -732,16 +699,15 @@
 
   {
     const int start_allocs = num_allocs;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc_slices(&exec_ctx, &alloc, 1024, 1, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc_slices(&alloc, 1024, 1, &buffer);
+    grpc_core::ExecCtx::Get()->Flush();
     assert_counter_becomes(&num_allocs, start_allocs + 1);
   }
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_slice_buffer_destroy_internal(&buffer);
   }
   destroy_user(usr);
   grpc_resource_quota_unref(q);
@@ -765,23 +731,21 @@
 
   {
     const int start_allocs = num_allocs;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc_slices(&exec_ctx, &alloc, 1024, 1, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc_slices(&alloc, 1024, 1, &buffer);
+    grpc_core::ExecCtx::Get()->Flush();
     assert_counter_becomes(&num_allocs, start_allocs + 1);
   }
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_unref(&exec_ctx, usr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_unref(usr);
   }
 
   grpc_resource_quota_unref(q);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_slice_buffer_destroy_internal(&buffer);
   }
 }
 
@@ -809,9 +773,9 @@
 
   {
     const int start_allocs = num_allocs;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_alloc_slices(&exec_ctx, &alloc, 1024, 1, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_alloc_slices(&alloc, 1024, 1, &buffer);
+    grpc_core::ExecCtx::Get()->Flush();
     assert_counter_becomes(&num_allocs, start_allocs + 1);
   }
 
@@ -822,16 +786,14 @@
   GPR_ASSERT(grpc_resource_quota_get_memory_pressure(q) > 1 - eps);
 
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_resource_user_unref(&exec_ctx, usr);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resource_user_unref(usr);
   }
 
   grpc_resource_quota_unref(q);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_slice_buffer_destroy_internal(&buffer);
   }
 }
 
diff --git a/test/core/iomgr/tcp_client_posix_test.cc b/test/core/iomgr/tcp_client_posix_test.cc
index 9fb1a2d..40a050e 100644
--- a/test/core/iomgr/tcp_client_posix_test.cc
+++ b/test/core/iomgr/tcp_client_posix_test.cc
@@ -53,26 +53,24 @@
 static void finish_connection() {
   gpr_mu_lock(g_mu);
   g_connections_complete++;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(&exec_ctx, g_pollset, nullptr)));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
+
   gpr_mu_unlock(g_mu);
 }
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void must_succeed(void* arg, grpc_error* error) {
   GPR_ASSERT(g_connecting != nullptr);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  grpc_endpoint_shutdown(
-      exec_ctx, g_connecting,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("must_succeed called"));
-  grpc_endpoint_destroy(exec_ctx, g_connecting);
+  grpc_endpoint_shutdown(g_connecting, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                           "must_succeed called"));
+  grpc_endpoint_destroy(g_connecting);
   g_connecting = nullptr;
   finish_connection();
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void must_fail(void* arg, grpc_error* error) {
   GPR_ASSERT(g_connecting == nullptr);
   GPR_ASSERT(error != GRPC_ERROR_NONE);
   finish_connection();
@@ -85,7 +83,7 @@
   int r;
   int connections_complete_before;
   grpc_closure done;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_DEBUG, "test_succeeds");
 
@@ -108,8 +106,8 @@
   GPR_ASSERT(getsockname(svr_fd, (struct sockaddr*)addr,
                          (socklen_t*)&resolved_addr.len) == 0);
   GRPC_CLOSURE_INIT(&done, must_succeed, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, g_pollset_set,
-                          nullptr, &resolved_addr, GRPC_MILLIS_INF_FUTURE);
+  grpc_tcp_client_connect(&done, &g_connecting, g_pollset_set, nullptr,
+                          &resolved_addr, GRPC_MILLIS_INF_FUTURE);
 
   /* await the connection */
   do {
@@ -125,17 +123,15 @@
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker,
+        grpc_pollset_work(g_pollset, &worker,
                           grpc_timespec_to_millis_round_up(
                               grpc_timeout_seconds_to_deadline(5)))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
 
   gpr_mu_unlock(g_mu);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_fails(void) {
@@ -143,7 +139,7 @@
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   int connections_complete_before;
   grpc_closure done;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_DEBUG, "test_fails");
 
@@ -157,8 +153,8 @@
 
   /* connect to a broken address */
   GRPC_CLOSURE_INIT(&done, must_fail, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, g_pollset_set,
-                          nullptr, &resolved_addr, GRPC_MILLIS_INF_FUTURE);
+  grpc_tcp_client_connect(&done, &g_connecting, g_pollset_set, nullptr,
+                          &resolved_addr, GRPC_MILLIS_INF_FUTURE);
 
   gpr_mu_lock(g_mu);
 
@@ -166,7 +162,7 @@
   while (g_connections_complete == connections_complete_before) {
     grpc_pollset_worker* worker = nullptr;
     grpc_millis polling_deadline = test_deadline();
-    switch (grpc_timer_check(&exec_ctx, &polling_deadline)) {
+    switch (grpc_timer_check(&polling_deadline)) {
       case GRPC_TIMERS_FIRED:
         break;
       case GRPC_TIMERS_NOT_CHECKED:
@@ -174,42 +170,43 @@
       /* fall through */
       case GRPC_TIMERS_CHECKED_AND_EMPTY:
         GPR_ASSERT(GRPC_LOG_IF_ERROR(
-            "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                              polling_deadline)));
+            "pollset_work",
+            grpc_pollset_work(g_pollset, &worker, polling_deadline)));
         break;
     }
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
 
   gpr_mu_unlock(g_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset_set = grpc_pollset_set_create();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
-  grpc_pollset_set_add_pollset(&exec_ctx, g_pollset_set, g_pollset);
-  grpc_exec_ctx_finish(&exec_ctx);
-  test_succeeds();
-  gpr_log(GPR_ERROR, "End of first test");
-  test_fails();
-  grpc_pollset_set_destroy(&exec_ctx, g_pollset_set);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset_set = grpc_pollset_set_create();
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
+    grpc_pollset_set_add_pollset(g_pollset_set, g_pollset);
+
+    test_succeeds();
+    gpr_log(GPR_ERROR, "End of first test");
+    test_fails();
+    grpc_pollset_set_destroy(g_pollset_set);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+  }
+
   grpc_shutdown();
   gpr_free(g_pollset);
   return 0;
diff --git a/test/core/iomgr/tcp_client_uv_test.cc b/test/core/iomgr/tcp_client_uv_test.cc
index 101d7bf..0c6250e 100644
--- a/test/core/iomgr/tcp_client_uv_test.cc
+++ b/test/core/iomgr/tcp_client_uv_test.cc
@@ -46,30 +46,28 @@
   return grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(10));
 }
 
-static void finish_connection(grpc_exec_ctx* exec_ctx) {
+static void finish_connection() {
   gpr_mu_lock(g_mu);
   g_connections_complete++;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
-                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void must_succeed(void* arg, grpc_error* error) {
   GPR_ASSERT(g_connecting != NULL);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  grpc_endpoint_shutdown(
-      exec_ctx, g_connecting,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("must_succeed called"));
-  grpc_endpoint_destroy(exec_ctx, g_connecting);
+  grpc_endpoint_shutdown(g_connecting, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                                           "must_succeed called"));
+  grpc_endpoint_destroy(g_connecting);
   g_connecting = NULL;
-  finish_connection(exec_ctx);
+  finish_connection();
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void must_fail(void* arg, grpc_error* error) {
   GPR_ASSERT(g_connecting == NULL);
   GPR_ASSERT(error != GRPC_ERROR_NONE);
-  finish_connection(exec_ctx);
+  finish_connection();
 }
 
 static void close_cb(uv_handle_t* handle) { gpr_free(handle); }
@@ -89,7 +87,7 @@
   uv_tcp_t* svr_handle = static_cast<uv_tcp_t*>(gpr_malloc(sizeof(uv_tcp_t)));
   int connections_complete_before;
   grpc_closure done;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_DEBUG, "test_succeeds");
 
@@ -110,8 +108,8 @@
   GPR_ASSERT(uv_tcp_getsockname(svr_handle, (struct sockaddr*)addr,
                                 (int*)&resolved_addr.len) == 0);
   GRPC_CLOSURE_INIT(&done, must_succeed, NULL, grpc_schedule_on_exec_ctx);
-  grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, NULL, NULL,
-                          &resolved_addr, GRPC_MILLIS_INF_FUTURE);
+  grpc_tcp_client_connect(&done, &g_connecting, NULL, NULL, &resolved_addr,
+                          GRPC_MILLIS_INF_FUTURE);
 
   gpr_mu_lock(g_mu);
 
@@ -119,11 +117,11 @@
     grpc_pollset_worker* worker = NULL;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker,
+        grpc_pollset_work(g_pollset, &worker,
                           grpc_timespec_to_millis_round_up(
                               grpc_timeout_seconds_to_deadline(5)))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
 
@@ -131,8 +129,6 @@
   uv_close((uv_handle_t*)svr_handle, close_cb);
 
   gpr_mu_unlock(g_mu);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_fails(void) {
@@ -140,7 +136,7 @@
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   int connections_complete_before;
   grpc_closure done;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_DEBUG, "test_fails");
 
@@ -154,8 +150,8 @@
 
   /* connect to a broken address */
   GRPC_CLOSURE_INIT(&done, must_fail, NULL, grpc_schedule_on_exec_ctx);
-  grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, NULL, NULL,
-                          &resolved_addr, GRPC_MILLIS_INF_FUTURE);
+  grpc_tcp_client_connect(&done, &g_connecting, NULL, NULL, &resolved_addr,
+                          GRPC_MILLIS_INF_FUTURE);
 
   gpr_mu_lock(g_mu);
 
@@ -164,7 +160,7 @@
     grpc_pollset_worker* worker = NULL;
     gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
     grpc_millis polling_deadline = test_deadline();
-    switch (grpc_timer_check(&exec_ctx, &polling_deadline)) {
+    switch (grpc_timer_check(&polling_deadline)) {
       case GRPC_TIMERS_FIRED:
         break;
       case GRPC_TIMERS_NOT_CHECKED:
@@ -172,39 +168,37 @@
       /* fall through */
       case GRPC_TIMERS_CHECKED_AND_EMPTY:
         GPR_ASSERT(GRPC_LOG_IF_ERROR(
-            "pollset_work", grpc_pollset_work(&exec_ctx, g_pollset, &worker,
-                                              polling_deadline)));
+            "pollset_work",
+            grpc_pollset_work(g_pollset, &worker, polling_deadline)));
         break;
     }
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
 
   gpr_mu_unlock(g_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_test_init(argc, argv);
   grpc_init();
   g_pollset = static_cast<grpc_pollset*>(gpr_malloc(grpc_pollset_size()));
   grpc_pollset_init(g_pollset, &g_mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   test_succeeds();
   gpr_log(GPR_ERROR, "End of first test");
   test_fails();
   GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_shutdown(g_pollset, &destroyed);
+
   grpc_shutdown();
   gpr_free(g_pollset);
   return 0;
diff --git a/test/core/iomgr/tcp_posix_test.cc b/test/core/iomgr/tcp_posix_test.cc
index 7986dc2..f4acba8 100644
--- a/test/core/iomgr/tcp_posix_test.cc
+++ b/test/core/iomgr/tcp_posix_test.cc
@@ -131,8 +131,7 @@
   return num_bytes;
 }
 
-static void read_cb(grpc_exec_ctx* exec_ctx, void* user_data,
-                    grpc_error* error) {
+static void read_cb(void* user_data, grpc_error* error) {
   struct read_socket_state* state = (struct read_socket_state*)user_data;
   size_t read_bytes;
   int current_data;
@@ -147,11 +146,11 @@
   gpr_log(GPR_INFO, "Read %" PRIuPTR " bytes of %" PRIuPTR, read_bytes,
           state->target_read_bytes);
   if (state->read_bytes >= state->target_read_bytes) {
-    GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+    GPR_ASSERT(
+        GRPC_LOG_IF_ERROR("kick", grpc_pollset_kick(g_pollset, nullptr)));
     gpr_mu_unlock(g_mu);
   } else {
-    grpc_endpoint_read(exec_ctx, state->ep, &state->incoming, &state->read_cb);
+    grpc_endpoint_read(state->ep, &state->incoming, &state->read_cb);
     gpr_mu_unlock(g_mu);
   }
 }
@@ -164,7 +163,7 @@
   size_t written_bytes;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO, "Read test of size %" PRIuPTR ", slice size %" PRIuPTR,
           num_bytes, slice_size);
@@ -175,9 +174,8 @@
   a[0].key = const_cast<char*>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
   a[0].type = GRPC_ARG_INTEGER, a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "read_test"), &args,
-                       "test");
-  grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
+  ep = grpc_tcp_create(grpc_fd_create(sv[1], "read_test"), &args, "test");
+  grpc_endpoint_add_to_pollset(ep, g_pollset);
 
   written_bytes = fill_socket_partial(sv[0], num_bytes);
   gpr_log(GPR_INFO, "Wrote %" PRIuPTR " bytes", written_bytes);
@@ -188,24 +186,22 @@
   grpc_slice_buffer_init(&state.incoming);
   GRPC_CLOSURE_INIT(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
-  grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
+  grpc_endpoint_read(ep, &state.incoming, &state.read_cb);
 
   gpr_mu_lock(g_mu);
   while (state.read_bytes < state.target_read_bytes) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
-  grpc_endpoint_destroy(&exec_ctx, ep);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_buffer_destroy_internal(&state.incoming);
+  grpc_endpoint_destroy(ep);
 }
 
 /* Write to a socket until it fills up, then read from it using the grpc_tcp
@@ -217,7 +213,7 @@
   ssize_t written_bytes;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO, "Start large read test, slice size %" PRIuPTR, slice_size);
 
@@ -228,9 +224,8 @@
   a[0].type = GRPC_ARG_INTEGER;
   a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "large_read_test"),
-                       &args, "test");
-  grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
+  ep = grpc_tcp_create(grpc_fd_create(sv[1], "large_read_test"), &args, "test");
+  grpc_endpoint_add_to_pollset(ep, g_pollset);
 
   written_bytes = fill_socket(sv[0]);
   gpr_log(GPR_INFO, "Wrote %" PRIuPTR " bytes", written_bytes);
@@ -241,24 +236,22 @@
   grpc_slice_buffer_init(&state.incoming);
   GRPC_CLOSURE_INIT(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
-  grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
+  grpc_endpoint_read(ep, &state.incoming, &state.read_cb);
 
   gpr_mu_lock(g_mu);
   while (state.read_bytes < state.target_read_bytes) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
-  grpc_endpoint_destroy(&exec_ctx, ep);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_buffer_destroy_internal(&state.incoming);
+  grpc_endpoint_destroy(ep);
 }
 
 struct write_socket_state {
@@ -289,16 +282,15 @@
   return slices;
 }
 
-static void write_done(grpc_exec_ctx* exec_ctx,
-                       void* user_data /* write_socket_state */,
+static void write_done(void* user_data /* write_socket_state */,
                        grpc_error* error) {
   struct write_socket_state* state = (struct write_socket_state*)user_data;
   gpr_log(GPR_INFO, "Write done callback called");
   gpr_mu_lock(g_mu);
   gpr_log(GPR_INFO, "Signalling write done");
   state->write_done = 1;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
@@ -309,7 +301,7 @@
   int flags;
   int current = 0;
   int i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   flags = fcntl(fd, F_GETFL, 0);
   GPR_ASSERT(fcntl(fd, F_SETFL, flags & ~O_NONBLOCK) == 0);
@@ -319,11 +311,11 @@
     gpr_mu_lock(g_mu);
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker,
+        grpc_pollset_work(g_pollset, &worker,
                           grpc_timespec_to_millis_round_up(
                               grpc_timeout_milliseconds_to_deadline(10)))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     do {
       bytes_read =
           read(fd, buf, bytes_left > read_size ? read_size : bytes_left);
@@ -356,7 +348,7 @@
   grpc_closure write_done_closure;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO,
           "Start write test with %" PRIuPTR " bytes, slice size %" PRIuPTR,
@@ -368,9 +360,8 @@
   a[0].key = const_cast<char*>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
   a[0].type = GRPC_ARG_INTEGER, a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "write_test"), &args,
-                       "test");
-  grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
+  ep = grpc_tcp_create(grpc_fd_create(sv[1], "write_test"), &args, "test");
+  grpc_endpoint_add_to_pollset(ep, g_pollset);
 
   state.ep = ep;
   state.write_done = 0;
@@ -382,7 +373,7 @@
   GRPC_CLOSURE_INIT(&write_done_closure, write_done, &state,
                     grpc_schedule_on_exec_ctx);
 
-  grpc_endpoint_write(&exec_ctx, ep, &outgoing, &write_done_closure);
+  grpc_endpoint_write(ep, &outgoing, &write_done_closure);
   drain_socket_blocking(sv[0], num_bytes, num_bytes);
   gpr_mu_lock(g_mu);
   for (;;) {
@@ -391,25 +382,23 @@
       break;
     }
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &outgoing);
-  grpc_endpoint_destroy(&exec_ctx, ep);
+  grpc_slice_buffer_destroy_internal(&outgoing);
+  grpc_endpoint_destroy(ep);
   gpr_free(slices);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-void on_fd_released(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* errors) {
+void on_fd_released(void* arg, grpc_error* errors) {
   int* done = (int*)arg;
   *done = 1;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
 }
 
 /* Do a read_test, then release fd and try to read/write again. Verify that
@@ -422,7 +411,7 @@
   int fd;
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(20));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure fd_released_cb;
   int fd_released_done = 0;
   GRPC_CLOSURE_INIT(&fd_released_cb, &on_fd_released, &fd_released_done,
@@ -439,10 +428,9 @@
   a[0].type = GRPC_ARG_INTEGER;
   a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "read_test"), &args,
-                       "test");
+  ep = grpc_tcp_create(grpc_fd_create(sv[1], "read_test"), &args, "test");
   GPR_ASSERT(grpc_tcp_fd(ep) == sv[1] && sv[1] >= 0);
-  grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
+  grpc_endpoint_add_to_pollset(ep, g_pollset);
 
   written_bytes = fill_socket_partial(sv[0], num_bytes);
   gpr_log(GPR_INFO, "Wrote %" PRIuPTR " bytes", written_bytes);
@@ -453,38 +441,35 @@
   grpc_slice_buffer_init(&state.incoming);
   GRPC_CLOSURE_INIT(&state.read_cb, read_cb, &state, grpc_schedule_on_exec_ctx);
 
-  grpc_endpoint_read(&exec_ctx, ep, &state.incoming, &state.read_cb);
+  grpc_endpoint_read(ep, &state.incoming, &state.read_cb);
 
   gpr_mu_lock(g_mu);
   while (state.read_bytes < state.target_read_bytes) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_log(GPR_DEBUG, "wakeup: read=%" PRIdPTR " target=%" PRIdPTR,
             state.read_bytes, state.target_read_bytes);
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(g_mu);
   }
   GPR_ASSERT(state.read_bytes == state.target_read_bytes);
   gpr_mu_unlock(g_mu);
 
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &state.incoming);
-  grpc_tcp_destroy_and_release_fd(&exec_ctx, ep, &fd, &fd_released_cb);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_slice_buffer_destroy_internal(&state.incoming);
+  grpc_tcp_destroy_and_release_fd(ep, &fd, &fd_released_cb);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(g_mu);
   while (!fd_released_done) {
     grpc_pollset_worker* worker = nullptr;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "pollset_work",
-        grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+        "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
     gpr_log(GPR_DEBUG, "wakeup: fd_released_done=%d", fd_released_done);
   }
   gpr_mu_unlock(g_mu);
   GPR_ASSERT(fd_released_done == 1);
   GPR_ASSERT(fd == sv[1]);
-  grpc_exec_ctx_finish(&exec_ctx);
 
   written_bytes = fill_socket_partial(sv[0], num_bytes);
   drain_socket_blocking(fd, written_bytes, written_bytes);
@@ -522,7 +507,7 @@
     size_t slice_size) {
   int sv[2];
   grpc_endpoint_test_fixture f;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   create_sockets(sv);
   grpc_resource_quota* resource_quota =
@@ -532,15 +517,13 @@
   a[0].type = GRPC_ARG_INTEGER;
   a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
-  f.client_ep = grpc_tcp_create(
-      &exec_ctx, grpc_fd_create(sv[0], "fixture:client"), &args, "test");
-  f.server_ep = grpc_tcp_create(
-      &exec_ctx, grpc_fd_create(sv[1], "fixture:server"), &args, "test");
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.client_ep, g_pollset);
-  grpc_endpoint_add_to_pollset(&exec_ctx, f.server_ep, g_pollset);
-
-  grpc_exec_ctx_finish(&exec_ctx);
+  f.client_ep =
+      grpc_tcp_create(grpc_fd_create(sv[0], "fixture:client"), &args, "test");
+  f.server_ep =
+      grpc_tcp_create(grpc_fd_create(sv[1], "fixture:server"), &args, "test");
+  grpc_resource_quota_unref_internal(resource_quota);
+  grpc_endpoint_add_to_pollset(f.client_ep, g_pollset);
+  grpc_endpoint_add_to_pollset(f.server_ep, g_pollset);
 
   return f;
 }
@@ -549,24 +532,26 @@
     {"tcp/tcp_socketpair", create_fixture_tcp_socketpair, clean_up},
 };
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, (grpc_pollset*)p);
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy((grpc_pollset*)p);
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
-  grpc_pollset_init(g_pollset, &g_mu);
-  grpc_endpoint_tests(configs[0], g_pollset, g_mu);
-  run_tests();
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+    grpc_pollset_init(g_pollset, &g_mu);
+    grpc_endpoint_tests(configs[0], g_pollset, g_mu);
+    run_tests();
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+
+    grpc_core::ExecCtx::Get()->Flush();
+  }
   grpc_shutdown();
   gpr_free(g_pollset);
 
diff --git a/test/core/iomgr/tcp_server_posix_test.cc b/test/core/iomgr/tcp_server_posix_test.cc
index 48d8d42..3c9ca21 100644
--- a/test/core/iomgr/tcp_server_posix_test.cc
+++ b/test/core/iomgr/tcp_server_posix_test.cc
@@ -110,8 +110,7 @@
       result->server, acceptor->port_index, acceptor->fd_index);
 }
 
-static void server_weak_ref_shutdown(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void server_weak_ref_shutdown(void* arg, grpc_error* error) {
   server_weak_ref* weak_ref = static_cast<server_weak_ref*>(arg);
   weak_ref->server = nullptr;
 }
@@ -145,12 +144,11 @@
   }
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
-                       grpc_pollset* pollset,
+static void on_connect(void* arg, grpc_endpoint* tcp, grpc_pollset* pollset,
                        grpc_tcp_server_acceptor* acceptor) {
-  grpc_endpoint_shutdown(exec_ctx, tcp,
+  grpc_endpoint_shutdown(tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
-  grpc_endpoint_destroy(exec_ctx, tcp);
+  grpc_endpoint_destroy(tcp);
 
   on_connect_result temp_result;
   on_connect_result_set(&temp_result, acceptor);
@@ -159,38 +157,33 @@
   gpr_mu_lock(g_mu);
   g_result = temp_result;
   g_nconnects++;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
 static void test_no_op(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s));
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(nullptr, nullptr, &s));
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(nullptr, nullptr, &s));
   LOG_TEST("test_no_op_with_start");
-  grpc_tcp_server_start(&exec_ctx, s, nullptr, 0, on_connect, nullptr);
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_start(s, nullptr, 0, on_connect, nullptr);
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(nullptr, nullptr, &s));
   LOG_TEST("test_no_op_with_port");
 
   memset(&resolved_addr, 0, sizeof(resolved_addr));
@@ -201,17 +194,15 @@
                  GRPC_ERROR_NONE &&
              port > 0);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_port_and_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(nullptr, nullptr, &s));
   LOG_TEST("test_no_op_with_port_and_start");
   int port = -1;
 
@@ -222,13 +213,12 @@
                  GRPC_ERROR_NONE &&
              port > 0);
 
-  grpc_tcp_server_start(&exec_ctx, s, nullptr, 0, on_connect, nullptr);
+  grpc_tcp_server_start(s, nullptr, 0, on_connect, nullptr);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 }
 
-static grpc_error* tcp_connect(grpc_exec_ctx* exec_ctx, const test_addr* remote,
+static grpc_error* tcp_connect(const test_addr* remote,
                                on_connect_result* result) {
   grpc_millis deadline =
       grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(10));
@@ -254,17 +244,17 @@
   }
   gpr_log(GPR_DEBUG, "wait");
   while (g_nconnects == nconnects_before &&
-         deadline > grpc_exec_ctx_now(exec_ctx)) {
+         deadline > grpc_core::ExecCtx::Get()->Now()) {
     grpc_pollset_worker* worker = nullptr;
     grpc_error* err;
-    if ((err = grpc_pollset_work(exec_ctx, g_pollset, &worker, deadline)) !=
+    if ((err = grpc_pollset_work(g_pollset, &worker, deadline)) !=
         GRPC_ERROR_NONE) {
       gpr_mu_unlock(g_mu);
       close(clifd);
       return err;
     }
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_log(GPR_DEBUG, "wait done");
@@ -279,7 +269,7 @@
   gpr_mu_unlock(g_mu);
   gpr_log(GPR_INFO, "Result (%d, %d) fd %d", result->port_index,
           result->fd_index, result->server_fd);
-  grpc_tcp_server_unref(exec_ctx, result->server);
+  grpc_tcp_server_unref(result->server);
   return GRPC_ERROR_NONE;
 }
 
@@ -292,7 +282,7 @@
 static void test_connect(size_t num_connects,
                          const grpc_channel_args* channel_args,
                          test_addrs* dst_addrs, bool test_dst_addrs) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   grpc_resolved_address resolved_addr1;
   struct sockaddr_storage* const addr =
@@ -307,7 +297,7 @@
   grpc_tcp_server* s;
   const unsigned num_ports = 2;
   GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, nullptr, channel_args, &s));
+             grpc_tcp_server_create(nullptr, channel_args, &s));
   unsigned port_num;
   server_weak_ref weak_ref;
   server_weak_ref_init(&weak_ref);
@@ -352,7 +342,7 @@
   svr1_fd_count = grpc_tcp_server_port_fd_count(s, 1);
   GPR_ASSERT(svr1_fd_count >= 1);
 
-  grpc_tcp_server_start(&exec_ctx, s, &g_pollset, 1, on_connect, nullptr);
+  grpc_tcp_server_start(s, &g_pollset, 1, on_connect, nullptr);
 
   if (dst_addrs != nullptr) {
     int ports[] = {svr_port, svr1_port};
@@ -372,7 +362,7 @@
         test_addr_init_str(&dst);
         ++num_tested;
         on_connect_result_init(&result);
-        if ((err = tcp_connect(&exec_ctx, &dst, &result)) == GRPC_ERROR_NONE &&
+        if ((err = tcp_connect(&dst, &result)) == GRPC_ERROR_NONE &&
             result.server_fd >= 0 && result.server == s) {
           continue;
         }
@@ -403,8 +393,8 @@
         for (connect_num = 0; connect_num < num_connects; ++connect_num) {
           on_connect_result result;
           on_connect_result_init(&result);
-          GPR_ASSERT(GRPC_LOG_IF_ERROR("tcp_connect",
-                                       tcp_connect(&exec_ctx, &dst, &result)));
+          GPR_ASSERT(
+              GRPC_LOG_IF_ERROR("tcp_connect", tcp_connect(&dst, &result)));
           GPR_ASSERT(result.server_fd == fd);
           GPR_ASSERT(result.port_index == port_num);
           GPR_ASSERT(result.fd_index == fd_num);
@@ -420,21 +410,19 @@
   GPR_ASSERT(weak_ref.server != nullptr);
   GPR_ASSERT(grpc_tcp_server_port_fd(s, 0, 0) >= 0);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Weak ref lost. */
   GPR_ASSERT(weak_ref.server == nullptr);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_arg chan_args[1];
   chan_args[0].type = GRPC_ARG_INTEGER;
   chan_args[0].key = const_cast<char*>(GRPC_ARG_EXPAND_WILDCARD_ADDRS);
@@ -447,58 +435,61 @@
       static_cast<test_addrs*>(gpr_zalloc(sizeof(*dst_addrs)));
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
 
-  test_no_op();
-  test_no_op_with_start();
-  test_no_op_with_port();
-  test_no_op_with_port_and_start();
+    test_no_op();
+    test_no_op_with_start();
+    test_no_op_with_port();
+    test_no_op_with_port_and_start();
 
-  if (getifaddrs(&ifa) != 0 || ifa == nullptr) {
-    gpr_log(GPR_ERROR, "getifaddrs: %s", strerror(errno));
-    return EXIT_FAILURE;
-  }
-  dst_addrs->naddrs = 0;
-  for (ifa_it = ifa; ifa_it != nullptr && dst_addrs->naddrs < MAX_ADDRS;
-       ifa_it = ifa_it->ifa_next) {
-    if (ifa_it->ifa_addr == nullptr) {
-      continue;
-    } else if (ifa_it->ifa_addr->sa_family == AF_INET) {
-      dst_addrs->addrs[dst_addrs->naddrs].addr.len = sizeof(struct sockaddr_in);
-    } else if (ifa_it->ifa_addr->sa_family == AF_INET6) {
-      dst_addrs->addrs[dst_addrs->naddrs].addr.len =
-          sizeof(struct sockaddr_in6);
-    } else {
-      continue;
+    if (getifaddrs(&ifa) != 0 || ifa == nullptr) {
+      gpr_log(GPR_ERROR, "getifaddrs: %s", strerror(errno));
+      return EXIT_FAILURE;
     }
-    memcpy(dst_addrs->addrs[dst_addrs->naddrs].addr.addr, ifa_it->ifa_addr,
-           dst_addrs->addrs[dst_addrs->naddrs].addr.len);
-    GPR_ASSERT(
-        grpc_sockaddr_set_port(&dst_addrs->addrs[dst_addrs->naddrs].addr, 0));
-    test_addr_init_str(&dst_addrs->addrs[dst_addrs->naddrs]);
-    ++dst_addrs->naddrs;
+    dst_addrs->naddrs = 0;
+    for (ifa_it = ifa; ifa_it != nullptr && dst_addrs->naddrs < MAX_ADDRS;
+         ifa_it = ifa_it->ifa_next) {
+      if (ifa_it->ifa_addr == nullptr) {
+        continue;
+      } else if (ifa_it->ifa_addr->sa_family == AF_INET) {
+        dst_addrs->addrs[dst_addrs->naddrs].addr.len =
+            sizeof(struct sockaddr_in);
+      } else if (ifa_it->ifa_addr->sa_family == AF_INET6) {
+        dst_addrs->addrs[dst_addrs->naddrs].addr.len =
+            sizeof(struct sockaddr_in6);
+      } else {
+        continue;
+      }
+      memcpy(dst_addrs->addrs[dst_addrs->naddrs].addr.addr, ifa_it->ifa_addr,
+             dst_addrs->addrs[dst_addrs->naddrs].addr.len);
+      GPR_ASSERT(
+          grpc_sockaddr_set_port(&dst_addrs->addrs[dst_addrs->naddrs].addr, 0));
+      test_addr_init_str(&dst_addrs->addrs[dst_addrs->naddrs]);
+      ++dst_addrs->naddrs;
+    }
+    freeifaddrs(ifa);
+    ifa = nullptr;
+
+    /* Connect to same addresses as listeners. */
+    test_connect(1, nullptr, nullptr, false);
+    test_connect(10, nullptr, nullptr, false);
+
+    /* Set dst_addrs->addrs[i].len=0 for dst_addrs that are unreachable with a
+       "::" listener. */
+    test_connect(1, nullptr, dst_addrs, true);
+
+    /* Test connect(2) with dst_addrs. */
+    test_connect(1, &channel_args, dst_addrs, false);
+    /* Test connect(2) with dst_addrs. */
+    test_connect(10, &channel_args, dst_addrs, false);
+
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
   }
-  freeifaddrs(ifa);
-  ifa = nullptr;
-
-  /* Connect to same addresses as listeners. */
-  test_connect(1, nullptr, nullptr, false);
-  test_connect(10, nullptr, nullptr, false);
-
-  /* Set dst_addrs->addrs[i].len=0 for dst_addrs that are unreachable with a
-     "::" listener. */
-  test_connect(1, nullptr, dst_addrs, true);
-
-  /* Test connect(2) with dst_addrs. */
-  test_connect(1, &channel_args, dst_addrs, false);
-  /* Test connect(2) with dst_addrs. */
-  test_connect(10, &channel_args, dst_addrs, false);
-
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   gpr_free(dst_addrs);
   gpr_free(g_pollset);
diff --git a/test/core/iomgr/tcp_server_uv_test.cc b/test/core/iomgr/tcp_server_uv_test.cc
index dd047a0..35d62b5 100644
--- a/test/core/iomgr/tcp_server_uv_test.cc
+++ b/test/core/iomgr/tcp_server_uv_test.cc
@@ -74,8 +74,7 @@
   result->fd_index = acceptor->fd_index;
 }
 
-static void server_weak_ref_shutdown(grpc_exec_ctx* exec_ctx, void* arg,
-                                     grpc_error* error) {
+static void server_weak_ref_shutdown(void* arg, grpc_error* error) {
   server_weak_ref* weak_ref = static_cast<server_weak_ref*>(arg);
   weak_ref->server = NULL;
 }
@@ -97,12 +96,11 @@
   weak_ref->server = server;
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
-                       grpc_pollset* pollset,
+static void on_connect(void* arg, grpc_endpoint* tcp, grpc_pollset* pollset,
                        grpc_tcp_server_acceptor* acceptor) {
-  grpc_endpoint_shutdown(exec_ctx, tcp,
+  grpc_endpoint_shutdown(tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
-  grpc_endpoint_destroy(exec_ctx, tcp);
+  grpc_endpoint_destroy(tcp);
 
   on_connect_result temp_result;
   on_connect_result_set(&temp_result, acceptor);
@@ -111,38 +109,33 @@
   gpr_mu_lock(g_mu);
   g_result = temp_result;
   g_nconnects++;
-  GPR_ASSERT(GRPC_LOG_IF_ERROR("pollset_kick",
-                               grpc_pollset_kick(exec_ctx, g_pollset, NULL)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }
 
 static void test_no_op(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_start");
-  grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_start(s, NULL, 0, on_connect, NULL);
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_port(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port");
 
   memset(&resolved_addr, 0, sizeof(resolved_addr));
@@ -153,17 +146,15 @@
                  GRPC_ERROR_NONE &&
              port > 0);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 }
 
 static void test_no_op_with_port_and_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port_and_start");
   int port;
 
@@ -174,10 +165,9 @@
                  GRPC_ERROR_NONE &&
              port > 0);
 
-  grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);
+  grpc_tcp_server_start(s, NULL, 0, on_connect, NULL);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 }
 
 static void connect_cb(uv_connect_t* req, int status) {
@@ -187,8 +177,8 @@
 
 static void close_cb(uv_handle_t* handle) { gpr_free(handle); }
 
-static void tcp_connect(grpc_exec_ctx* exec_ctx, const struct sockaddr* remote,
-                        socklen_t remote_len, on_connect_result* result) {
+static void tcp_connect(const struct sockaddr* remote, socklen_t remote_len,
+                        on_connect_result* result) {
   gpr_timespec deadline = grpc_timeout_seconds_to_deadline(10);
   uv_tcp_t* client_handle =
       static_cast<uv_tcp_t*>(gpr_malloc(sizeof(uv_tcp_t)));
@@ -208,10 +198,10 @@
     grpc_pollset_worker* worker = NULL;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
-        grpc_pollset_work(exec_ctx, g_pollset, &worker,
+        grpc_pollset_work(g_pollset, &worker,
                           grpc_timespec_to_millis_round_up(deadline))));
     gpr_mu_unlock(g_mu);
-    grpc_exec_ctx_finish(exec_ctx);
+
     gpr_mu_lock(g_mu);
   }
   gpr_log(GPR_DEBUG, "wait done");
@@ -224,7 +214,7 @@
 
 /* Tests a tcp server with multiple ports. */
 static void test_connect(unsigned n) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   grpc_resolved_address resolved_addr1;
   struct sockaddr_storage* addr = (struct sockaddr_storage*)resolved_addr.addr;
@@ -233,8 +223,7 @@
   int svr_port;
   int svr1_port;
   grpc_tcp_server* s;
-  GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   unsigned i;
   server_weak_ref weak_ref;
   server_weak_ref_init(&weak_ref);
@@ -257,48 +246,45 @@
                  GRPC_ERROR_NONE &&
              svr_port == svr1_port);
 
-  grpc_tcp_server_start(&exec_ctx, s, &g_pollset, 1, on_connect, NULL);
+  grpc_tcp_server_start(s, &g_pollset, 1, on_connect, NULL);
 
   GPR_ASSERT(uv_ip6_addr("::", svr_port, (struct sockaddr_in6*)addr1) == 0);
 
   for (i = 0; i < n; i++) {
     on_connect_result result;
     on_connect_result_init(&result);
-    tcp_connect(&exec_ctx, (struct sockaddr*)addr, (socklen_t)resolved_addr.len,
-                &result);
+    tcp_connect((struct sockaddr*)addr, (socklen_t)resolved_addr.len, &result);
     GPR_ASSERT(result.port_index == 0);
     GPR_ASSERT(result.server == s);
     if (weak_ref.server == NULL) {
       server_weak_ref_set(&weak_ref, result.server);
     }
-    grpc_tcp_server_unref(&exec_ctx, result.server);
+    grpc_tcp_server_unref(result.server);
 
     on_connect_result_init(&result);
-    tcp_connect(&exec_ctx, (struct sockaddr*)addr1,
-                (socklen_t)resolved_addr1.len, &result);
+    tcp_connect((struct sockaddr*)addr1, (socklen_t)resolved_addr1.len,
+                &result);
     GPR_ASSERT(result.port_index == 1);
     GPR_ASSERT(result.server == s);
-    grpc_tcp_server_unref(&exec_ctx, result.server);
+    grpc_tcp_server_unref(result.server);
   }
 
   /* Weak ref to server valid until final unref. */
   GPR_ASSERT(weak_ref.server != NULL);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 
   /* Weak ref lost. */
   GPR_ASSERT(weak_ref.server == NULL);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_test_init(argc, argv);
   grpc_init();
   g_pollset = static_cast<grpc_pollset*>(gpr_malloc(grpc_pollset_size()));
@@ -313,8 +299,8 @@
 
   GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_shutdown(g_pollset, &destroyed);
+
   grpc_shutdown();
   gpr_free(g_pollset);
   return 0;
diff --git a/test/core/iomgr/timer_list_test.cc b/test/core/iomgr/timer_list_test.cc
index d74ea4f..deb8c4d 100644
--- a/test/core/iomgr/timer_list_test.cc
+++ b/test/core/iomgr/timer_list_test.cc
@@ -25,6 +25,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 #include "src/core/lib/debug/trace.h"
 #include "test/core/util/test_config.h"
@@ -37,127 +38,125 @@
 
 static int cb_called[MAX_CB][2];
 
-static void cb(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void cb(void* arg, grpc_error* error) {
   cb_called[(intptr_t)arg][error == GRPC_ERROR_NONE]++;
 }
 
 static void add_test(void) {
   int i;
   grpc_timer timers[20];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO, "add_test");
 
-  grpc_timer_list_init(&exec_ctx);
+  grpc_timer_list_init();
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_timer_trace);
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_timer_check_trace);
   memset(cb_called, 0, sizeof(cb_called));
 
-  grpc_millis start = grpc_exec_ctx_now(&exec_ctx);
+  grpc_millis start = grpc_core::ExecCtx::Get()->Now();
 
   /* 10 ms timers.  will expire in the current epoch */
   for (i = 0; i < 10; i++) {
     grpc_timer_init(
-        &exec_ctx, &timers[i], start + 10,
+        &timers[i], start + 10,
         GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)i, grpc_schedule_on_exec_ctx));
   }
 
   /* 1010 ms timers.  will expire in the next epoch */
   for (i = 10; i < 20; i++) {
     grpc_timer_init(
-        &exec_ctx, &timers[i], start + 1010,
+        &timers[i], start + 1010,
         GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)i, grpc_schedule_on_exec_ctx));
   }
 
   /* collect timers.  Only the first batch should be ready. */
-  exec_ctx.now = start + 500;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) == GRPC_TIMERS_FIRED);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(start + 500);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED);
+  grpc_core::ExecCtx::Get()->Flush();
   for (i = 0; i < 20; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 10));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
-  exec_ctx.now = start + 600;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) ==
-             GRPC_TIMERS_CHECKED_AND_EMPTY);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(start + 600);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_CHECKED_AND_EMPTY);
+  grpc_core::ExecCtx::Get()->Flush();
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 10));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
   /* collect the rest of the timers */
-  exec_ctx.now = start + 1500;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) == GRPC_TIMERS_FIRED);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(start + 1500);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED);
+  grpc_core::ExecCtx::Get()->Flush();
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 20));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
-  exec_ctx.now = start + 1600;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) ==
-             GRPC_TIMERS_CHECKED_AND_EMPTY);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(start + 1600);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_CHECKED_AND_EMPTY);
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 20));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
-  grpc_timer_list_shutdown(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_list_shutdown();
 }
 
 /* Cleaning up a list with pending timers. */
 void destruction_test(void) {
   grpc_timer timers[5];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   gpr_log(GPR_INFO, "destruction_test");
 
-  exec_ctx.now_is_valid = true;
-  exec_ctx.now = 0;
-  grpc_timer_list_init(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(0);
+  grpc_timer_list_init();
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_timer_trace);
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_timer_check_trace);
   memset(cb_called, 0, sizeof(cb_called));
 
   grpc_timer_init(
-      &exec_ctx, &timers[0], 100,
+      &timers[0], 100,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)0, grpc_schedule_on_exec_ctx));
   grpc_timer_init(
-      &exec_ctx, &timers[1], 3,
+      &timers[1], 3,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)1, grpc_schedule_on_exec_ctx));
   grpc_timer_init(
-      &exec_ctx, &timers[2], 100,
+      &timers[2], 100,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)2, grpc_schedule_on_exec_ctx));
   grpc_timer_init(
-      &exec_ctx, &timers[3], 3,
+      &timers[3], 3,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)3, grpc_schedule_on_exec_ctx));
   grpc_timer_init(
-      &exec_ctx, &timers[4], 1,
+      &timers[4], 1,
       GRPC_CLOSURE_CREATE(cb, (void*)(intptr_t)4, grpc_schedule_on_exec_ctx));
-  exec_ctx.now = 2;
-  GPR_ASSERT(grpc_timer_check(&exec_ctx, nullptr) == GRPC_TIMERS_FIRED);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->TestOnlySetNow(2);
+  GPR_ASSERT(grpc_timer_check(nullptr) == GRPC_TIMERS_FIRED);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(1 == cb_called[4][1]);
-  grpc_timer_cancel(&exec_ctx, &timers[0]);
-  grpc_timer_cancel(&exec_ctx, &timers[3]);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_cancel(&timers[0]);
+  grpc_timer_cancel(&timers[3]);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(1 == cb_called[0][0]);
   GPR_ASSERT(1 == cb_called[3][0]);
 
-  grpc_timer_list_shutdown(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_timer_list_shutdown();
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(1 == cb_called[1][0]);
   GPR_ASSERT(1 == cb_called[2][0]);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_core::ExecCtx::GlobalInit();
   gpr_set_log_verbosity(GPR_LOG_SEVERITY_DEBUG);
   add_test();
   destruction_test();
+  grpc_core::ExecCtx::GlobalShutdown();
   return 0;
 }
 
diff --git a/test/core/iomgr/udp_server_test.cc b/test/core/iomgr/udp_server_test.cc
index 803f017..0deb534 100644
--- a/test/core/iomgr/udp_server_test.cc
+++ b/test/core/iomgr/udp_server_test.cc
@@ -50,7 +50,7 @@
 static int g_number_of_bytes_read = 0;
 static int g_number_of_orphan_calls = 0;
 
-static void on_read(grpc_exec_ctx* exec_ctx, grpc_fd* emfd, void* user_data) {
+static bool on_read(grpc_fd* emfd, void* user_data) {
   char read_buffer[512];
   ssize_t byte_count;
 
@@ -61,24 +61,27 @@
   g_number_of_reads++;
   g_number_of_bytes_read += (int)byte_count;
 
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
+  return false;
 }
 
-static void on_write(grpc_exec_ctx* exec_ctx, grpc_fd* emfd, void* user_data) {
+static void on_write(grpc_fd* emfd, void* user_data,
+                     grpc_closure* notify_on_write_closure) {
   gpr_mu_lock(g_mu);
   g_number_of_writes++;
 
-  GPR_ASSERT(GRPC_LOG_IF_ERROR(
-      "pollset_kick", grpc_pollset_kick(exec_ctx, g_pollset, nullptr)));
+  GPR_ASSERT(
+      GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, nullptr)));
   gpr_mu_unlock(g_mu);
 }
 
-static void on_fd_orphaned(grpc_exec_ctx* exec_ctx, grpc_fd* emfd,
-                           grpc_closure* closure, void* user_data) {
+static void on_fd_orphaned(grpc_fd* emfd, grpc_closure* closure,
+                           void* user_data) {
   gpr_log(GPR_INFO, "gRPC FD about to be orphaned: %d",
           grpc_fd_wrapped_fd(emfd));
+  GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
   g_number_of_orphan_calls++;
 }
 
@@ -127,24 +130,22 @@
 }
 
 static void test_no_op(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
 }
 
 static void test_no_op_with_start(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
   LOG_TEST("test_no_op_with_start");
-  grpc_udp_server_start(&exec_ctx, s, nullptr, 0, nullptr);
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_start(s, nullptr, 0, nullptr);
+  grpc_udp_server_destroy(s, nullptr);
 }
 
 static void test_no_op_with_port(void) {
   g_number_of_orphan_calls = 0;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
@@ -156,8 +157,7 @@
   GPR_ASSERT(grpc_udp_server_add_port(s, &resolved_addr, on_read, on_write,
                                       on_fd_orphaned));
 
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
 
   /* The server had a single FD, which should have been orphaned. */
   GPR_ASSERT(g_number_of_orphan_calls == 1);
@@ -165,7 +165,7 @@
 
 static void test_no_op_with_port_and_socket_factory(void) {
   g_number_of_orphan_calls = 0;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
 
@@ -175,7 +175,7 @@
   grpc_channel_args* channel_args =
       grpc_channel_args_copy_and_add(nullptr, &socket_factory_arg, 1);
   grpc_udp_server* s = grpc_udp_server_create(channel_args);
-  grpc_channel_args_destroy(&exec_ctx, channel_args);
+  grpc_channel_args_destroy(channel_args);
 
   LOG_TEST("test_no_op_with_port_and_socket_factory");
 
@@ -187,8 +187,8 @@
   GPR_ASSERT(socket_factory->number_of_socket_calls == 1);
   GPR_ASSERT(socket_factory->number_of_bind_calls == 1);
 
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
+
   grpc_socket_factory_unref(&socket_factory->base);
 
   /* The server had a single FD, which should have been orphaned. */
@@ -197,7 +197,7 @@
 
 static void test_no_op_with_port_and_start(void) {
   g_number_of_orphan_calls = 0;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
@@ -209,10 +209,9 @@
   GPR_ASSERT(grpc_udp_server_add_port(s, &resolved_addr, on_read, on_write,
                                       on_fd_orphaned));
 
-  grpc_udp_server_start(&exec_ctx, s, nullptr, 0, nullptr);
+  grpc_udp_server_start(s, nullptr, 0, nullptr);
 
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
 
   /* The server had a single FD, which is orphaned exactly once in *
    * grpc_udp_server_destroy. */
@@ -220,13 +219,12 @@
 }
 
 static void test_receive(int number_of_clients) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_storage* addr = (struct sockaddr_storage*)resolved_addr.addr;
   int clifd, svrfd;
   grpc_udp_server* s = grpc_udp_server_create(nullptr);
   int i;
-  int number_of_reads_before;
   grpc_millis deadline;
   grpc_pollset* pollsets[1];
   LOG_TEST("test_receive");
@@ -248,7 +246,7 @@
   GPR_ASSERT(resolved_addr.len <= sizeof(struct sockaddr_storage));
 
   pollsets[0] = g_pollset;
-  grpc_udp_server_start(&exec_ctx, s, pollsets, 1, nullptr);
+  grpc_udp_server_start(s, pollsets, 1, nullptr);
 
   gpr_mu_lock(g_mu);
 
@@ -256,67 +254,62 @@
     deadline =
         grpc_timespec_to_millis_round_up(grpc_timeout_seconds_to_deadline(10));
 
-    number_of_reads_before = g_number_of_reads;
+    int number_of_bytes_read_before = g_number_of_bytes_read;
     /* Create a socket, send a packet to the UDP server. */
     clifd = socket(addr->ss_family, SOCK_DGRAM, 0);
     GPR_ASSERT(clifd >= 0);
     GPR_ASSERT(connect(clifd, (struct sockaddr*)addr,
                        (socklen_t)resolved_addr.len) == 0);
     GPR_ASSERT(5 == write(clifd, "hello", 5));
-    while (g_number_of_reads == number_of_reads_before &&
-           deadline > grpc_exec_ctx_now(&exec_ctx)) {
+    while (g_number_of_bytes_read < (number_of_bytes_read_before + 5) &&
+           deadline > grpc_core::ExecCtx::Get()->Now()) {
       grpc_pollset_worker* worker = nullptr;
       GPR_ASSERT(GRPC_LOG_IF_ERROR(
-          "pollset_work",
-          grpc_pollset_work(&exec_ctx, g_pollset, &worker, deadline)));
+          "pollset_work", grpc_pollset_work(g_pollset, &worker, deadline)));
       gpr_mu_unlock(g_mu);
-      grpc_exec_ctx_flush(&exec_ctx);
+      grpc_core::ExecCtx::Get()->Flush();
       gpr_mu_lock(g_mu);
     }
-    GPR_ASSERT(g_number_of_reads == number_of_reads_before + 1);
     close(clifd);
   }
   GPR_ASSERT(g_number_of_bytes_read == 5 * number_of_clients);
 
   gpr_mu_unlock(g_mu);
 
-  grpc_udp_server_destroy(&exec_ctx, s, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_udp_server_destroy(s, nullptr);
 
   /* The server had a single FD, which is orphaned exactly once in *
    * grpc_udp_server_destroy. */
   GPR_ASSERT(g_number_of_orphan_calls == 1);
-
-  /* The write callback should have fired a few times. */
-  GPR_ASSERT(g_number_of_writes > 0);
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(p));
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
-  grpc_pollset_init(g_pollset, &g_mu);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
+    grpc_pollset_init(g_pollset, &g_mu);
 
-  test_no_op();
-  test_no_op_with_start();
-  test_no_op_with_port();
-  test_no_op_with_port_and_socket_factory();
-  test_no_op_with_port_and_start();
-  test_receive(1);
-  test_receive(10);
+    test_no_op();
+    test_no_op_with_start();
+    test_no_op_with_port();
+    test_no_op_with_port_and_socket_factory();
+    test_no_op_with_port_and_start();
+    test_receive(1);
+    test_receive(10);
 
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
-  gpr_free(g_pollset);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+    grpc_core::ExecCtx::Get()->Flush();
+    gpr_free(g_pollset);
+  }
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/wakeup_fd_cv_test.cc b/test/core/iomgr/wakeup_fd_cv_test.cc
index dc1d77a..d4e05bd 100644
--- a/test/core/iomgr/wakeup_fd_cv_test.cc
+++ b/test/core/iomgr/wakeup_fd_cv_test.cc
@@ -138,7 +138,7 @@
 
   opt = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&opt);
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
 
   // Wakeup wakeup_fd not listening for events
   GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd1) == GRPC_ERROR_NONE);
@@ -154,7 +154,7 @@
   // Pollin on socket fd
   pargs.timeout = -1;
   pargs.result = -2;
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
   trigger_socket_event();
   gpr_thd_join(t_id);
   GPR_ASSERT(pargs.result == 1);
@@ -168,7 +168,7 @@
   // Pollin on wakeup fd
   reset_socket_event();
   pargs.result = -2;
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
   GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd2) == GRPC_ERROR_NONE);
   gpr_thd_join(t_id);
 
@@ -182,7 +182,7 @@
 
   // Pollin on wakeupfd before poll()
   pargs.result = -2;
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
   gpr_thd_join(t_id);
 
   GPR_ASSERT(pargs.result == 1);
@@ -199,7 +199,7 @@
   reset_socket_event();
   GPR_ASSERT(grpc_wakeup_fd_consume_wakeup(&cvfd1) == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_wakeup_fd_consume_wakeup(&cvfd2) == GRPC_ERROR_NONE);
-  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_new(&t_id, "grpc_background_poll", &background_poll, &pargs, &opt);
   gpr_thd_join(t_id);
 
   GPR_ASSERT(pargs.result == 0);
diff --git a/test/core/nanopb/fuzzer_response.cc b/test/core/nanopb/fuzzer_response.cc
index 7039c80..3a70dea 100644
--- a/test/core/nanopb/fuzzer_response.cc
+++ b/test/core/nanopb/fuzzer_response.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h"
@@ -29,6 +30,7 @@
 static void dont_log(gpr_log_func_args* args) {}
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  grpc_init();
   if (squelch) gpr_set_log_function(dont_log);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_grpclb_initial_response* response;
@@ -36,5 +38,6 @@
     grpc_grpclb_initial_response_destroy(response);
   }
   grpc_slice_unref(slice);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/nanopb/fuzzer_serverlist.cc b/test/core/nanopb/fuzzer_serverlist.cc
index 0a6b176..d0af117 100644
--- a/test/core/nanopb/fuzzer_serverlist.cc
+++ b/test/core/nanopb/fuzzer_serverlist.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h"
@@ -29,6 +30,7 @@
 static void dont_log(gpr_log_func_args* args) {}
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  grpc_init();
   if (squelch) gpr_set_log_function(dont_log);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_grpclb_serverlist* serverlist;
@@ -36,5 +38,6 @@
     grpc_grpclb_destroy_serverlist(serverlist);
   }
   grpc_slice_unref(slice);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/network_benchmarks/low_level_ping_pong.cc b/test/core/network_benchmarks/low_level_ping_pong.cc
index 2ae9a45..96b0745 100644
--- a/test/core/network_benchmarks/low_level_ping_pong.cc
+++ b/test/core/network_benchmarks/low_level_ping_pong.cc
@@ -583,7 +583,7 @@
   gpr_log(GPR_INFO, "Starting test %s %s %zu", client_args->strategy_name,
           socket_type, client_args->msg_size);
 
-  gpr_thd_new(&tid, server_thread_wrap, server_args, nullptr);
+  gpr_thd_new(&tid, "server_thread", server_thread_wrap, server_args, nullptr);
   client_thread(client_args);
   return 0;
 }
diff --git a/test/core/security/credentials_test.cc b/test/core/security/credentials_test.cc
index 64d383a..ecc6192 100644
--- a/test/core/security/credentials_test.cc
+++ b/test/core/security/credentials_test.cc
@@ -148,41 +148,37 @@
 /* -- Tests. -- */
 
 static void test_empty_md_array(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_credentials_mdelem_array md_array;
   memset(&md_array, 0, sizeof(md_array));
   GPR_ASSERT(md_array.md == nullptr);
   GPR_ASSERT(md_array.size == 0);
-  grpc_credentials_mdelem_array_destroy(&exec_ctx, &md_array);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_credentials_mdelem_array_destroy(&md_array);
 }
 
 static void test_add_to_empty_md_array(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_credentials_mdelem_array md_array;
   memset(&md_array, 0, sizeof(md_array));
   const char* key = "hello";
   const char* value = "there blah blah blah blah blah blah blah";
-  grpc_mdelem md =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
-                              grpc_slice_from_copied_string(value));
+  grpc_mdelem md = grpc_mdelem_from_slices(
+      grpc_slice_from_copied_string(key), grpc_slice_from_copied_string(value));
   grpc_credentials_mdelem_array_add(&md_array, md);
   GPR_ASSERT(md_array.size == 1);
   GPR_ASSERT(grpc_mdelem_eq(md, md_array.md[0]));
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_credentials_mdelem_array_destroy(&exec_ctx, &md_array);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+  grpc_credentials_mdelem_array_destroy(&md_array);
 }
 
 static void test_add_abunch_to_md_array(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_credentials_mdelem_array md_array;
   memset(&md_array, 0, sizeof(md_array));
   const char* key = "hello";
   const char* value = "there blah blah blah blah blah blah blah";
-  grpc_mdelem md =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
-                              grpc_slice_from_copied_string(value));
+  grpc_mdelem md = grpc_mdelem_from_slices(
+      grpc_slice_from_copied_string(key), grpc_slice_from_copied_string(value));
   size_t num_entries = 1000;
   for (size_t i = 0; i < num_entries; ++i) {
     grpc_credentials_mdelem_array_add(&md_array, md);
@@ -190,57 +186,52 @@
   for (size_t i = 0; i < num_entries; ++i) {
     GPR_ASSERT(grpc_mdelem_eq(md_array.md[i], md));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_credentials_mdelem_array_destroy(&exec_ctx, &md_array);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+  grpc_credentials_mdelem_array_destroy(&md_array);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_ok(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
       http_response(200, valid_oauth2_json_response);
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
-             GRPC_CREDENTIALS_OK);
+                 &response, &token_md, &token_lifetime) == GRPC_CREDENTIALS_OK);
   GPR_ASSERT(token_lifetime == 3599 * GPR_MS_PER_SEC);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDKEY(token_md), "authorization") == 0);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(token_md),
                                 "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_") ==
              0);
-  GRPC_MDELEM_UNREF(&exec_ctx, token_md);
+  GRPC_MDELEM_UNREF(token_md);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_bad_http_status(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
       http_response(401, valid_oauth2_json_response);
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_empty_http_body(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response = http_response(200, "");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_invalid_json(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
@@ -249,14 +240,13 @@
                     " \"expires_in\":3599, "
                     " \"token_type\":\"Bearer\"");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response = http_response(200,
@@ -264,14 +254,13 @@
                                                  " \"expires_in\":3599, "
                                                  " \"token_type\":\"Bearer\"}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token_type(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
@@ -280,15 +269,14 @@
                     " \"expires_in\":3599, "
                     "}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_token_fetcher_creds_parsing_missing_token_lifetime(
     void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_httpcli_response response =
@@ -296,10 +284,9 @@
                     "{\"access_token\":\"ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_\","
                     " \"token_type\":\"Bearer\"}");
   GPR_ASSERT(grpc_oauth2_token_fetcher_credentials_parse_server_response(
-                 &exec_ctx, &response, &token_md, &token_lifetime) ==
+                 &response, &token_md, &token_lifetime) ==
              GRPC_CREDENTIALS_ERROR);
   grpc_http_response_destroy(&response);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 typedef struct {
@@ -336,8 +323,7 @@
   }
 }
 
-static void check_request_metadata(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void check_request_metadata(void* arg, grpc_error* error) {
   request_metadata_state* state = (request_metadata_state*)arg;
   gpr_log(GPR_INFO, "expected_error: %s",
           grpc_error_string(state->expected_error));
@@ -358,9 +344,8 @@
           state->expected_size, state->md_array.size);
   GPR_ASSERT(state->md_array.size == state->expected_size);
   check_metadata(state->expected, &state->md_array);
-  grpc_credentials_mdelem_array_destroy(exec_ctx, &state->md_array);
-  grpc_pollset_set_destroy(exec_ctx,
-                           grpc_polling_entity_pollset_set(&state->pollent));
+  grpc_credentials_mdelem_array_destroy(&state->md_array);
+  grpc_pollset_set_destroy(grpc_polling_entity_pollset_set(&state->pollent));
   gpr_free(state);
 }
 
@@ -379,22 +364,21 @@
   return state;
 }
 
-static void run_request_metadata_test(grpc_exec_ctx* exec_ctx,
-                                      grpc_call_credentials* creds,
+static void run_request_metadata_test(grpc_call_credentials* creds,
                                       grpc_auth_metadata_context auth_md_ctx,
                                       request_metadata_state* state) {
   grpc_error* error = GRPC_ERROR_NONE;
   if (grpc_call_credentials_get_request_metadata(
-          exec_ctx, creds, &state->pollent, auth_md_ctx, &state->md_array,
+          creds, &state->pollent, auth_md_ctx, &state->md_array,
           &state->on_request_metadata, &error)) {
     // Synchronous result.  Invoke the callback directly.
-    check_request_metadata(exec_ctx, state, error);
+    check_request_metadata(state, error);
     GRPC_ERROR_UNREF(error);
   }
 }
 
 static void test_google_iam_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {{GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
                         test_google_iam_authorization_token},
                        {GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY,
@@ -406,13 +390,12 @@
       nullptr);
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(creds);
 }
 
 static void test_access_token_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {{GRPC_AUTHORIZATION_METADATA_KEY, "Bearer blah"}};
   request_metadata_state* state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
@@ -421,16 +404,14 @@
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   GPR_ASSERT(strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_OAUTH2) == 0);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(creds);
 }
 
 static grpc_security_status check_channel_oauth2_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* c, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   GPR_ASSERT(strcmp(c->type, "mock") == 0);
   GPR_ASSERT(call_creds != nullptr);
   GPR_ASSERT(strcmp(call_creds->type, GRPC_CALL_CREDENTIALS_TYPE_OAUTH2) == 0);
@@ -438,7 +419,7 @@
 }
 
 static void test_channel_oauth2_composite_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_args* new_args;
   grpc_channel_credentials_vtable vtable = {
       nullptr, check_channel_oauth2_create_security_connector, nullptr};
@@ -452,14 +433,13 @@
   grpc_channel_credentials_release(channel_creds);
   grpc_call_credentials_release(oauth2_creds);
   GPR_ASSERT(grpc_channel_credentials_create_security_connector(
-                 &exec_ctx, channel_oauth2_creds, nullptr, nullptr, nullptr,
-                 &new_args) == GRPC_SECURITY_OK);
+                 channel_oauth2_creds, nullptr, nullptr, nullptr, &new_args) ==
+             GRPC_SECURITY_OK);
   grpc_channel_credentials_release(channel_oauth2_creds);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_oauth2_google_iam_composite_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {
       {GRPC_AUTHORIZATION_METADATA_KEY, test_oauth2_bearer_token},
       {GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
@@ -471,15 +451,15 @@
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   grpc_call_credentials* oauth2_creds = grpc_md_only_test_credentials_create(
-      &exec_ctx, "authorization", test_oauth2_bearer_token, 0);
+      "authorization", test_oauth2_bearer_token, 0);
   grpc_call_credentials* google_iam_creds = grpc_google_iam_credentials_create(
       test_google_iam_authorization_token, test_google_iam_authority_selector,
       nullptr);
   grpc_call_credentials* composite_creds =
       grpc_composite_call_credentials_create(oauth2_creds, google_iam_creds,
                                              nullptr);
-  grpc_call_credentials_unref(&exec_ctx, oauth2_creds);
-  grpc_call_credentials_unref(&exec_ctx, google_iam_creds);
+  grpc_call_credentials_unref(oauth2_creds);
+  grpc_call_credentials_unref(google_iam_creds);
   GPR_ASSERT(
       strcmp(composite_creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0);
   const grpc_call_credentials_array* creds_array =
@@ -489,17 +469,15 @@
                     GRPC_CALL_CREDENTIALS_TYPE_OAUTH2) == 0);
   GPR_ASSERT(strcmp(creds_array->creds_array[1]->type,
                     GRPC_CALL_CREDENTIALS_TYPE_IAM) == 0);
-  run_request_metadata_test(&exec_ctx, composite_creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, composite_creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  run_request_metadata_test(composite_creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(composite_creds);
 }
 
 static grpc_security_status
 check_channel_oauth2_google_iam_create_security_connector(
-    grpc_exec_ctx* exec_ctx, grpc_channel_credentials* c,
-    grpc_call_credentials* call_creds, const char* target,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
+    grpc_channel_credentials* c, grpc_call_credentials* call_creds,
+    const char* target, const grpc_channel_args* args,
+    grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   const grpc_call_credentials_array* creds_array;
   GPR_ASSERT(strcmp(c->type, "mock") == 0);
   GPR_ASSERT(call_creds != nullptr);
@@ -514,7 +492,7 @@
 }
 
 static void test_channel_oauth2_google_iam_composite_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_args* new_args;
   grpc_channel_credentials_vtable vtable = {
       nullptr, check_channel_oauth2_google_iam_create_security_connector,
@@ -538,11 +516,10 @@
   grpc_call_credentials_release(google_iam_creds);
 
   GPR_ASSERT(grpc_channel_credentials_create_security_connector(
-                 &exec_ctx, channel_oauth2_iam_creds, nullptr, nullptr, nullptr,
+                 channel_oauth2_iam_creds, nullptr, nullptr, nullptr,
                  &new_args) == GRPC_SECURITY_OK);
 
   grpc_channel_credentials_release(channel_oauth2_iam_creds);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void validate_compute_engine_http_request(
@@ -559,35 +536,32 @@
 }
 
 static int compute_engine_httpcli_get_success_override(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   validate_compute_engine_http_request(request);
   *response = http_response(200, valid_oauth2_json_response);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static int compute_engine_httpcli_get_failure_override(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   validate_compute_engine_http_request(request);
   *response = http_response(403, "Not Authorized.");
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static int httpcli_post_should_not_be_called(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body_bytes, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_done, grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, const char* body_bytes,
+    size_t body_size, grpc_millis deadline, grpc_closure* on_done,
+    grpc_httpcli_response* response) {
   GPR_ASSERT("HTTP POST should not be called" == nullptr);
   return 1;
 }
 
-static int httpcli_get_should_not_be_called(grpc_exec_ctx* exec_ctx,
-                                            const grpc_httpcli_request* request,
+static int httpcli_get_should_not_be_called(const grpc_httpcli_request* request,
                                             grpc_millis deadline,
                                             grpc_closure* on_done,
                                             grpc_httpcli_response* response) {
@@ -596,7 +570,7 @@
 }
 
 static void test_compute_engine_creds_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {
       {"authorization", "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_"}};
   grpc_call_credentials* creds =
@@ -609,24 +583,23 @@
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_httpcli_set_override(compute_engine_httpcli_get_success_override,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Second request: the cached token should be served directly. */
   state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  grpc_call_credentials_unref(creds);
   grpc_httpcli_set_override(nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_compute_engine_creds_failure(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   request_metadata_state* state = make_request_metadata_state(
       GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "Error occured when fetching oauth2 token."),
@@ -637,10 +610,9 @@
       grpc_google_compute_engine_credentials_create(nullptr);
   grpc_httpcli_set_override(compute_engine_httpcli_get_failure_override,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(creds);
   grpc_httpcli_set_override(nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void validate_refresh_token_http_request(
@@ -667,27 +639,27 @@
 }
 
 static int refresh_token_httpcli_post_success(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_done, grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, const char* body, size_t body_size,
+    grpc_millis deadline, grpc_closure* on_done,
+    grpc_httpcli_response* response) {
   validate_refresh_token_http_request(request, body, body_size);
   *response = http_response(200, valid_oauth2_json_response);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static int refresh_token_httpcli_post_failure(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_done, grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, const char* body, size_t body_size,
+    grpc_millis deadline, grpc_closure* on_done,
+    grpc_httpcli_response* response) {
   validate_refresh_token_http_request(request, body, body_size);
   *response = http_response(403, "Not Authorized.");
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static void test_refresh_token_creds_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {
       {"authorization", "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_"}};
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
@@ -700,24 +672,23 @@
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             refresh_token_httpcli_post_success);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Second request: the cached token should be served directly. */
   state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  grpc_call_credentials_unref(creds);
   grpc_httpcli_set_override(nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_refresh_token_creds_failure(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   request_metadata_state* state = make_request_metadata_state(
       GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "Error occured when fetching oauth2 token."),
@@ -728,10 +699,9 @@
       test_refresh_token_str, nullptr);
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             refresh_token_httpcli_post_failure);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_call_credentials_unref(creds);
   grpc_httpcli_set_override(nullptr, nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void validate_jwt_encode_and_sign_params(
@@ -821,7 +791,7 @@
 
 static void test_jwt_creds_success(void) {
   char* json_key_string = test_json_key_str();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   char* expected_md_value;
@@ -835,16 +805,16 @@
   request_metadata_state* state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_jwt_encode_and_sign_set_override(encode_and_sign_jwt_success);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Second request: the cached token should be served directly. */
   state =
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   grpc_jwt_encode_and_sign_set_override(
       encode_and_sign_jwt_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Third request: Different service url so jwt_encode_and_sign should be
      called again (no caching). */
@@ -852,19 +822,18 @@
       make_request_metadata_state(GRPC_ERROR_NONE, emd, GPR_ARRAY_SIZE(emd));
   auth_md_ctx.service_url = other_test_service_url;
   grpc_jwt_encode_and_sign_set_override(encode_and_sign_jwt_success);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  grpc_call_credentials_unref(creds);
   gpr_free(json_key_string);
   gpr_free(expected_md_value);
   grpc_jwt_encode_and_sign_set_override(nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_jwt_creds_signing_failure(void) {
   char* json_key_string = test_json_key_str();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   request_metadata_state* state = make_request_metadata_state(
@@ -875,12 +844,11 @@
           json_key_string, grpc_max_auth_token_lifetime(), nullptr);
 
   grpc_jwt_encode_and_sign_set_override(encode_and_sign_jwt_failure);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, state);
+  run_request_metadata_test(creds, auth_md_ctx, state);
 
   gpr_free(json_key_string);
-  grpc_call_credentials_unref(&exec_ctx, creds);
+  grpc_call_credentials_unref(creds);
   grpc_jwt_encode_and_sign_set_override(nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void set_google_default_creds_env_var_with_file_contents(
@@ -897,7 +865,7 @@
 }
 
 static void test_google_default_creds_auth_key(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_service_account_jwt_access_credentials* jwt;
   grpc_composite_channel_credentials* creds;
   char* json_key = test_json_key_str();
@@ -913,13 +881,12 @@
       strcmp(jwt->key.client_id,
              "777-abaslkan11hlb6nmim3bpspl31ud.apps.googleusercontent.com") ==
       0);
-  grpc_channel_credentials_unref(&exec_ctx, &creds->base);
+  grpc_channel_credentials_unref(&creds->base);
   gpr_setenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR, ""); /* Reset. */
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void test_google_default_creds_refresh_token(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_google_refresh_token_credentials* refresh;
   grpc_composite_channel_credentials* creds;
   grpc_flush_cached_google_default_credentials();
@@ -931,15 +898,13 @@
   refresh = (grpc_google_refresh_token_credentials*)creds->call_creds;
   GPR_ASSERT(strcmp(refresh->refresh_token.client_id,
                     "32555999999.apps.googleusercontent.com") == 0);
-  grpc_channel_credentials_unref(&exec_ctx, &creds->base);
+  grpc_channel_credentials_unref(&creds->base);
   gpr_setenv(GRPC_GOOGLE_CREDENTIALS_ENV_VAR, ""); /* Reset. */
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static int default_creds_gce_detection_httpcli_get_success_override(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   *response = http_response(200, "");
   grpc_http_header* headers =
       static_cast<grpc_http_header*>(gpr_malloc(sizeof(*headers) * 1));
@@ -949,14 +914,14 @@
   response->hdrs = headers;
   GPR_ASSERT(strcmp(request->http.path, "/") == 0);
   GPR_ASSERT(strcmp(request->host, "metadata.google.internal") == 0);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static char* null_well_known_creds_path_getter(void) { return nullptr; }
 
 static void test_google_default_creds_gce(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   expected_md emd[] = {
       {"authorization", "Bearer ya29.AHES6ZRN3-HlhAPya30GnW_bHSb_"}};
   request_metadata_state* state =
@@ -981,8 +946,8 @@
   GPR_ASSERT(creds->call_creds != nullptr);
   grpc_httpcli_set_override(compute_engine_httpcli_get_success_override,
                             httpcli_post_should_not_be_called);
-  run_request_metadata_test(&exec_ctx, creds->call_creds, auth_md_ctx, state);
-  grpc_exec_ctx_flush(&exec_ctx);
+  run_request_metadata_test(creds->call_creds, auth_md_ctx, state);
+  grpc_core::ExecCtx::Get()->Flush();
 
   /* Check that we get a cached creds if we call
      grpc_google_default_credentials_create again.
@@ -994,22 +959,20 @@
   GPR_ASSERT(cached_creds == &creds->base);
 
   /* Cleanup. */
-  grpc_channel_credentials_unref(&exec_ctx, cached_creds);
-  grpc_channel_credentials_unref(&exec_ctx, &creds->base);
+  grpc_channel_credentials_unref(cached_creds);
+  grpc_channel_credentials_unref(&creds->base);
   grpc_httpcli_set_override(nullptr, nullptr);
   grpc_override_well_known_credentials_path_getter(nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static int default_creds_gce_detection_httpcli_get_failure_override(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   /* No magic header. */
   GPR_ASSERT(strcmp(request->http.path, "/") == 0);
   GPR_ASSERT(strcmp(request->host, "metadata.google.internal") == 0);
   *response = http_response(200, "");
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
@@ -1093,7 +1056,7 @@
 static void test_metadata_plugin_success(void) {
   plugin_state state = PLUGIN_INITIAL_STATE;
   grpc_metadata_credentials_plugin plugin;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   request_metadata_state* md_state = make_request_metadata_state(
@@ -1106,17 +1069,17 @@
   grpc_call_credentials* creds =
       grpc_metadata_credentials_create_from_plugin(plugin, nullptr);
   GPR_ASSERT(state == PLUGIN_INITIAL_STATE);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, md_state);
+  run_request_metadata_test(creds, auth_md_ctx, md_state);
   GPR_ASSERT(state == PLUGIN_GET_METADATA_CALLED_STATE);
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_call_credentials_unref(creds);
+
   GPR_ASSERT(state == PLUGIN_DESTROY_CALLED_STATE);
 }
 
 static void test_metadata_plugin_failure(void) {
   plugin_state state = PLUGIN_INITIAL_STATE;
   grpc_metadata_credentials_plugin plugin;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_auth_metadata_context auth_md_ctx = {test_service_url, test_method,
                                             nullptr, nullptr};
   char* expected_error;
@@ -1134,10 +1097,10 @@
   grpc_call_credentials* creds =
       grpc_metadata_credentials_create_from_plugin(plugin, nullptr);
   GPR_ASSERT(state == PLUGIN_INITIAL_STATE);
-  run_request_metadata_test(&exec_ctx, creds, auth_md_ctx, md_state);
+  run_request_metadata_test(creds, auth_md_ctx, md_state);
   GPR_ASSERT(state == PLUGIN_GET_METADATA_CALLED_STATE);
-  grpc_call_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_call_credentials_unref(creds);
+
   GPR_ASSERT(state == PLUGIN_DESTROY_CALLED_STATE);
 }
 
@@ -1158,7 +1121,7 @@
 }
 
 static void test_channel_creds_duplicate_without_call_creds(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   grpc_channel_credentials* channel_creds =
       grpc_fake_transport_security_credentials_create();
@@ -1167,23 +1130,21 @@
       grpc_channel_credentials_duplicate_without_call_credentials(
           channel_creds);
   GPR_ASSERT(dup == channel_creds);
-  grpc_channel_credentials_unref(&exec_ctx, dup);
+  grpc_channel_credentials_unref(dup);
 
   grpc_call_credentials* call_creds =
       grpc_access_token_credentials_create("blah", nullptr);
   grpc_channel_credentials* composite_creds =
       grpc_composite_channel_credentials_create(channel_creds, call_creds,
                                                 nullptr);
-  grpc_call_credentials_unref(&exec_ctx, call_creds);
+  grpc_call_credentials_unref(call_creds);
   dup = grpc_channel_credentials_duplicate_without_call_credentials(
       composite_creds);
   GPR_ASSERT(dup == channel_creds);
-  grpc_channel_credentials_unref(&exec_ctx, dup);
+  grpc_channel_credentials_unref(dup);
 
-  grpc_channel_credentials_unref(&exec_ctx, channel_creds);
-  grpc_channel_credentials_unref(&exec_ctx, composite_creds);
-
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_credentials_unref(channel_creds);
+  grpc_channel_credentials_unref(composite_creds);
 }
 
 typedef struct {
diff --git a/test/core/security/json_token_test.cc b/test/core/security/json_token_test.cc
index 0b6ccd5..aac9cc0 100644
--- a/test/core/security/json_token_test.cc
+++ b/test/core/security/json_token_test.cc
@@ -207,7 +207,7 @@
 
 static grpc_json* parse_json_part_from_jwt(const char* str, size_t len,
                                            char** scratchpad) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   char* b64;
   char* decoded;
   grpc_json* json;
@@ -215,7 +215,7 @@
   b64 = static_cast<char*>(gpr_malloc(len + 1));
   strncpy(b64, str, len);
   b64[len] = '\0';
-  slice = grpc_base64_decode(&exec_ctx, b64, 1);
+  slice = grpc_base64_decode(b64, 1);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(slice));
   decoded = static_cast<char*>(gpr_malloc(GRPC_SLICE_LENGTH(slice) + 1));
   strncpy(decoded, (const char*)GRPC_SLICE_START_PTR(slice),
@@ -225,7 +225,7 @@
   gpr_free(b64);
   *scratchpad = decoded;
   grpc_slice_unref(slice);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return json;
 }
 
@@ -327,12 +327,12 @@
 static void check_jwt_signature(const char* b64_signature, RSA* rsa_key,
                                 const char* signed_data,
                                 size_t signed_data_size) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   EVP_MD_CTX* md_ctx = EVP_MD_CTX_create();
   EVP_PKEY* key = EVP_PKEY_new();
 
-  grpc_slice sig = grpc_base64_decode(&exec_ctx, b64_signature, 1);
+  grpc_slice sig = grpc_base64_decode(b64_signature, 1);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(sig));
   GPR_ASSERT(GRPC_SLICE_LENGTH(sig) == 128);
 
@@ -347,11 +347,9 @@
   GPR_ASSERT(EVP_DigestVerifyFinal(md_ctx, GRPC_SLICE_START_PTR(sig),
                                    GRPC_SLICE_LENGTH(sig)) == 1);
 
-  grpc_slice_unref_internal(&exec_ctx, sig);
+  grpc_slice_unref_internal(sig);
   if (key != nullptr) EVP_PKEY_free(key);
   if (md_ctx != nullptr) EVP_MD_CTX_destroy(md_ctx);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static char* service_account_creds_jwt_encode_and_sign(
@@ -485,6 +483,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_parse_json_key_success();
   test_parse_json_key_failure_bad_json();
   test_parse_json_key_failure_no_type();
@@ -499,5 +498,6 @@
   test_parse_refresh_token_failure_no_client_id();
   test_parse_refresh_token_failure_no_client_secret();
   test_parse_refresh_token_failure_no_refresh_token();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/security/jwt_verifier_test.cc b/test/core/security/jwt_verifier_test.cc
index df0ebe5..e219260 100644
--- a/test/core/security/jwt_verifier_test.cc
+++ b/test/core/security/jwt_verifier_test.cc
@@ -209,8 +209,8 @@
   grpc_json* json = grpc_json_parse_string_with_len(
       (char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
+  grpc_core::ExecCtx exec_ctx;
+  claims = grpc_jwt_claims_from_json(json, s);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(grpc_jwt_claims_json(claims) == json);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), "https://foo.com") == 0);
@@ -219,8 +219,7 @@
   GPR_ASSERT(strcmp(grpc_jwt_claims_id(claims), "jwtuniqueid") == 0);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_OK);
-  grpc_jwt_claims_destroy(&exec_ctx, claims);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static void test_expired_claims_failure(void) {
@@ -232,8 +231,8 @@
   gpr_timespec exp_exp = {120, 0, GPR_CLOCK_REALTIME};
   gpr_timespec exp_nbf = {60, 0, GPR_CLOCK_REALTIME};
   GPR_ASSERT(json != nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
+  grpc_core::ExecCtx exec_ctx;
+  claims = grpc_jwt_claims_from_json(json, s);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(grpc_jwt_claims_json(claims) == json);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), "https://foo.com") == 0);
@@ -246,17 +245,15 @@
 
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_TIME_CONSTRAINT_FAILURE);
-  grpc_jwt_claims_destroy(&exec_ctx, claims);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static void test_invalid_claims_failure(void) {
   grpc_slice s = grpc_slice_from_copied_string(invalid_claims);
   grpc_json* json = grpc_json_parse_string_with_len(
       (char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GPR_ASSERT(grpc_jwt_claims_from_json(&exec_ctx, json, s) == nullptr);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GPR_ASSERT(grpc_jwt_claims_from_json(json, s) == nullptr);
 }
 
 static void test_bad_audience_claims_failure(void) {
@@ -265,13 +262,12 @@
   grpc_json* json = grpc_json_parse_string_with_len(
       (char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
+  grpc_core::ExecCtx exec_ctx;
+  claims = grpc_jwt_claims_from_json(json, s);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://bar.com") ==
              GRPC_JWT_VERIFIER_BAD_AUDIENCE);
-  grpc_jwt_claims_destroy(&exec_ctx, claims);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static void test_bad_subject_claims_failure(void) {
@@ -280,13 +276,12 @@
   grpc_json* json = grpc_json_parse_string_with_len(
       (char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s));
   GPR_ASSERT(json != nullptr);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  claims = grpc_jwt_claims_from_json(&exec_ctx, json, s);
+  grpc_core::ExecCtx exec_ctx;
+  claims = grpc_jwt_claims_from_json(json, s);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(grpc_jwt_claims_check(claims, "https://foo.com") ==
              GRPC_JWT_VERIFIER_BAD_SUBJECT);
-  grpc_jwt_claims_destroy(&exec_ctx, claims);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static char* json_key_str(const char* last_part) {
@@ -323,17 +318,16 @@
 }
 
 static int httpcli_post_should_not_be_called(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    const char* body_bytes, size_t body_size, grpc_millis deadline,
-    grpc_closure* on_done, grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, const char* body_bytes,
+    size_t body_size, grpc_millis deadline, grpc_closure* on_done,
+    grpc_httpcli_response* response) {
   GPR_ASSERT("HTTP POST should not be called" == nullptr);
   return 1;
 }
 
 static int httpcli_get_google_keys_for_email(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   *response = http_response(200, good_google_email_keys());
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
@@ -341,22 +335,22 @@
                     "/robot/v1/metadata/x509/"
                     "777-abaslkan11hlb6nmim3bpspl31ud@developer."
                     "gserviceaccount.com") == 0);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
-static void on_verification_success(grpc_exec_ctx* exec_ctx, void* user_data,
+static void on_verification_success(void* user_data,
                                     grpc_jwt_verifier_status status,
                                     grpc_jwt_claims* claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_OK);
   GPR_ASSERT(claims != nullptr);
   GPR_ASSERT(user_data == (void*)expected_user_data);
   GPR_ASSERT(strcmp(grpc_jwt_claims_audience(claims), expected_audience) == 0);
-  grpc_jwt_claims_destroy(exec_ctx, claims);
+  grpc_jwt_claims_destroy(claims);
 }
 
 static void test_jwt_verifier_google_email_issuer_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_google_email_issuer);
@@ -369,28 +363,27 @@
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_success, (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
 static int httpcli_get_custom_keys_for_email(
-    grpc_exec_ctx* exec_ctx, const grpc_httpcli_request* request,
-    grpc_millis deadline, grpc_closure* on_done,
-    grpc_httpcli_response* response) {
+    const grpc_httpcli_request* request, grpc_millis deadline,
+    grpc_closure* on_done, grpc_httpcli_response* response) {
   *response = http_response(200, gpr_strdup(good_jwk_set));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "keys.bar.com") == 0);
   GPR_ASSERT(strcmp(request->http.path, "/jwk/foo@bar.com") == 0);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static void test_jwt_verifier_custom_email_issuer_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(&custom_mapping, 1);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_custom_email_issuer);
@@ -403,28 +396,26 @@
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_success, (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
-static int httpcli_get_jwk_set(grpc_exec_ctx* exec_ctx,
-                               const grpc_httpcli_request* request,
+static int httpcli_get_jwk_set(const grpc_httpcli_request* request,
                                grpc_millis deadline, grpc_closure* on_done,
                                grpc_httpcli_response* response) {
   *response = http_response(200, gpr_strdup(good_jwk_set));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
   GPR_ASSERT(strcmp(request->http.path, "/oauth2/v3/certs") == 0);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
-static int httpcli_get_openid_config(grpc_exec_ctx* exec_ctx,
-                                     const grpc_httpcli_request* request,
+static int httpcli_get_openid_config(const grpc_httpcli_request* request,
                                      grpc_millis deadline,
                                      grpc_closure* on_done,
                                      grpc_httpcli_response* response) {
@@ -434,12 +425,12 @@
   GPR_ASSERT(strcmp(request->http.path, GRPC_OPENID_CONFIG_URL_SUFFIX) == 0);
   grpc_httpcli_set_override(httpcli_get_jwk_set,
                             httpcli_post_should_not_be_called);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static void test_jwt_verifier_url_issuer_success(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_url_issuer);
@@ -452,16 +443,15 @@
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_success, (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
-static void on_verification_key_retrieval_error(grpc_exec_ctx* exec_ctx,
-                                                void* user_data,
+static void on_verification_key_retrieval_error(void* user_data,
                                                 grpc_jwt_verifier_status status,
                                                 grpc_jwt_claims* claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_KEY_RETRIEVAL_ERROR);
@@ -469,18 +459,17 @@
   GPR_ASSERT(user_data == (void*)expected_user_data);
 }
 
-static int httpcli_get_bad_json(grpc_exec_ctx* exec_ctx,
-                                const grpc_httpcli_request* request,
+static int httpcli_get_bad_json(const grpc_httpcli_request* request,
                                 grpc_millis deadline, grpc_closure* on_done,
                                 grpc_httpcli_response* response) {
   *response = http_response(200, gpr_strdup("{\"bad\": \"stuff\"}"));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
-  GRPC_CLOSURE_SCHED(exec_ctx, on_done, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(on_done, GRPC_ERROR_NONE);
   return 1;
 }
 
 static void test_jwt_verifier_url_issuer_bad_config(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_url_issuer);
@@ -493,17 +482,17 @@
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_key_retrieval_error,
                            (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
 static void test_jwt_verifier_bad_json_key(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_google_email_issuer);
@@ -516,11 +505,11 @@
                                  nullptr);
   grpc_auth_json_key_destruct(&key);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_key_retrieval_error,
                            (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(jwt);
   grpc_httpcli_set_override(nullptr, nullptr);
 }
@@ -532,9 +521,8 @@
   char* last_dot = strrchr(jwt, '.');
   GPR_ASSERT(last_dot != nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    sig = grpc_base64_decode(&exec_ctx, last_dot + 1, 1);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    sig = grpc_base64_decode(last_dot + 1, 1);
   }
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(sig));
   sig_bytes = GRPC_SLICE_START_PTR(sig);
@@ -546,8 +534,7 @@
   grpc_slice_unref(sig);
 }
 
-static void on_verification_bad_signature(grpc_exec_ctx* exec_ctx,
-                                          void* user_data,
+static void on_verification_bad_signature(void* user_data,
                                           grpc_jwt_verifier_status status,
                                           grpc_jwt_claims* claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_BAD_SIGNATURE);
@@ -556,7 +543,7 @@
 }
 
 static void test_jwt_verifier_bad_signature(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   char* jwt = nullptr;
   char* key_str = json_key_str(json_key_str_part3_for_url_issuer);
@@ -570,17 +557,16 @@
   grpc_auth_json_key_destruct(&key);
   corrupt_jwt_sig(jwt);
   GPR_ASSERT(jwt != nullptr);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, jwt, expected_audience,
+  grpc_jwt_verifier_verify(verifier, nullptr, jwt, expected_audience,
                            on_verification_bad_signature,
                            (void*)expected_user_data);
   gpr_free(jwt);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
-static int httpcli_get_should_not_be_called(grpc_exec_ctx* exec_ctx,
-                                            const grpc_httpcli_request* request,
+static int httpcli_get_should_not_be_called(const grpc_httpcli_request* request,
                                             grpc_millis deadline,
                                             grpc_closure* on_done,
                                             grpc_httpcli_response* response) {
@@ -588,7 +574,7 @@
   return 1;
 }
 
-static void on_verification_bad_format(grpc_exec_ctx* exec_ctx, void* user_data,
+static void on_verification_bad_format(void* user_data,
                                        grpc_jwt_verifier_status status,
                                        grpc_jwt_claims* claims) {
   GPR_ASSERT(status == GRPC_JWT_VERIFIER_BAD_FORMAT);
@@ -597,15 +583,15 @@
 }
 
 static void test_jwt_verifier_bad_format(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_jwt_verifier* verifier = grpc_jwt_verifier_create(nullptr, 0);
   grpc_httpcli_set_override(httpcli_get_should_not_be_called,
                             httpcli_post_should_not_be_called);
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, nullptr, "bad jwt",
-                           expected_audience, on_verification_bad_format,
+  grpc_jwt_verifier_verify(verifier, nullptr, "bad jwt", expected_audience,
+                           on_verification_bad_format,
                            (void*)expected_user_data);
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+  grpc_core::ExecCtx::Get()->Flush();
   grpc_httpcli_set_override(nullptr, nullptr);
 }
 
diff --git a/test/core/security/oauth2_utils.cc b/test/core/security/oauth2_utils.cc
index 602041e..0d3a127 100644
--- a/test/core/security/oauth2_utils.cc
+++ b/test/core/security/oauth2_utils.cc
@@ -39,8 +39,7 @@
   grpc_closure closure;
 } oauth2_request;
 
-static void on_oauth2_response(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void on_oauth2_response(void* arg, grpc_error* error) {
   oauth2_request* request = (oauth2_request*)arg;
   char* token = nullptr;
   grpc_slice token_slice;
@@ -54,25 +53,23 @@
            GRPC_SLICE_LENGTH(token_slice));
     token[GRPC_SLICE_LENGTH(token_slice)] = '\0';
   }
-  grpc_credentials_mdelem_array_destroy(exec_ctx, &request->md_array);
+  grpc_credentials_mdelem_array_destroy(&request->md_array);
   gpr_mu_lock(request->mu);
   request->is_done = true;
   request->token = token;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&request->pops),
-                        nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&request->pops), nullptr));
   gpr_mu_unlock(request->mu);
 }
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* unused,
-                       grpc_error* error) {}
+static void do_nothing(void* unused, grpc_error* error) {}
 
 char* grpc_test_fetch_oauth2_token_with_credentials(
     grpc_call_credentials* creds) {
   oauth2_request request;
   memset(&request, 0, sizeof(request));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure do_nothing_closure;
   grpc_auth_metadata_context null_ctx = {"", "", nullptr, nullptr};
 
@@ -88,31 +85,30 @@
                     grpc_schedule_on_exec_ctx);
 
   grpc_error* error = GRPC_ERROR_NONE;
-  if (grpc_call_credentials_get_request_metadata(
-          &exec_ctx, creds, &request.pops, null_ctx, &request.md_array,
-          &request.closure, &error)) {
+  if (grpc_call_credentials_get_request_metadata(creds, &request.pops, null_ctx,
+                                                 &request.md_array,
+                                                 &request.closure, &error)) {
     // Synchronous result; invoke callback directly.
-    on_oauth2_response(&exec_ctx, &request, error);
+    on_oauth2_response(&request, error);
     GRPC_ERROR_UNREF(error);
   }
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
 
   gpr_mu_lock(request.mu);
   while (!request.is_done) {
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(&exec_ctx,
-                              grpc_polling_entity_pollset(&request.pops),
+            grpc_pollset_work(grpc_polling_entity_pollset(&request.pops),
                               &worker, GRPC_MILLIS_INF_FUTURE))) {
       request.is_done = true;
     }
   }
   gpr_mu_unlock(request.mu);
 
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&request.pops),
+  grpc_pollset_shutdown(grpc_polling_entity_pollset(&request.pops),
                         &do_nothing_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   gpr_free(grpc_polling_entity_pollset(&request.pops));
   return request.token;
 }
diff --git a/test/core/security/print_google_default_creds_token.cc b/test/core/security/print_google_default_creds_token.cc
index f4acf02..b3742f5 100644
--- a/test/core/security/print_google_default_creds_token.cc
+++ b/test/core/security/print_google_default_creds_token.cc
@@ -41,8 +41,7 @@
   grpc_closure on_request_metadata;
 } synchronizer;
 
-static void on_metadata_response(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void on_metadata_response(void* arg, grpc_error* error) {
   synchronizer* sync = static_cast<synchronizer*>(arg);
   if (error != GRPC_ERROR_NONE) {
     fprintf(stderr, "Fetching token failed: %s\n", grpc_error_string(error));
@@ -57,14 +56,13 @@
   sync->is_done = true;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&sync->pops),
-                        nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&sync->pops), nullptr));
   gpr_mu_unlock(sync->mu);
 }
 
 int main(int argc, char** argv) {
   int result = 0;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   synchronizer sync;
   grpc_channel_credentials* creds = nullptr;
   const char* service_url = "https://test.foo.google.com/Foo";
@@ -97,11 +95,10 @@
 
   error = GRPC_ERROR_NONE;
   if (grpc_call_credentials_get_request_metadata(
-          &exec_ctx, ((grpc_composite_channel_credentials*)creds)->call_creds,
-          &sync.pops, context, &sync.md_array, &sync.on_request_metadata,
-          &error)) {
+          ((grpc_composite_channel_credentials*)creds)->call_creds, &sync.pops,
+          context, &sync.md_array, &sync.on_request_metadata, &error)) {
     // Synchronous response.  Invoke callback directly.
-    on_metadata_response(&exec_ctx, &sync, error);
+    on_metadata_response(&sync, error);
     GRPC_ERROR_UNREF(error);
   }
 
@@ -110,18 +107,15 @@
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(&exec_ctx,
-                              grpc_polling_entity_pollset(&sync.pops), &worker,
+            grpc_pollset_work(grpc_polling_entity_pollset(&sync.pops), &worker,
                               GRPC_MILLIS_INF_FUTURE)))
       sync.is_done = true;
     gpr_mu_unlock(sync.mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(sync.mu);
   }
   gpr_mu_unlock(sync.mu);
 
-  grpc_exec_ctx_finish(&exec_ctx);
-
   grpc_channel_credentials_release(creds);
   gpr_free(grpc_polling_entity_pollset(&sync.pops));
 
diff --git a/test/core/security/secure_endpoint_test.cc b/test/core/security/secure_endpoint_test.cc
index a12af02..38c78fe 100644
--- a/test/core/security/secure_endpoint_test.cc
+++ b/test/core/security/secure_endpoint_test.cc
@@ -38,7 +38,7 @@
 static grpc_endpoint_test_fixture secure_endpoint_create_fixture_tcp_socketpair(
     size_t slice_size, grpc_slice* leftover_slices, size_t leftover_nslices,
     bool use_zero_copy_protector) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   tsi_frame_protector* fake_read_protector =
       tsi_create_fake_frame_protector(nullptr);
   tsi_frame_protector* fake_write_protector =
@@ -60,8 +60,8 @@
   a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   tcp = grpc_iomgr_create_endpoint_pair("fixture", &args);
-  grpc_endpoint_add_to_pollset(&exec_ctx, tcp.client, g_pollset);
-  grpc_endpoint_add_to_pollset(&exec_ctx, tcp.server, g_pollset);
+  grpc_endpoint_add_to_pollset(tcp.client, g_pollset);
+  grpc_endpoint_add_to_pollset(tcp.server, g_pollset);
 
   if (leftover_nslices == 0) {
     f.client_ep = grpc_secure_endpoint_create(fake_read_protector,
@@ -117,7 +117,7 @@
   f.server_ep = grpc_secure_endpoint_create(fake_write_protector,
                                             fake_write_zero_copy_protector,
                                             tcp.server, nullptr, 0);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   return f;
 }
 
@@ -165,65 +165,62 @@
      clean_up},
 };
 
-static void inc_call_ctr(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
-  ++*(int*)arg;
-}
+static void inc_call_ctr(void* arg, grpc_error* error) { ++*(int*)arg; }
 
 static void test_leftover(grpc_endpoint_test_config config, size_t slice_size) {
   grpc_endpoint_test_fixture f = config.create_fixture(slice_size);
   grpc_slice_buffer incoming;
   grpc_slice s =
       grpc_slice_from_copied_string("hello world 12345678900987654321");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   int n = 0;
   grpc_closure done_closure;
   gpr_log(GPR_INFO, "Start test left over");
 
   grpc_slice_buffer_init(&incoming);
   GRPC_CLOSURE_INIT(&done_closure, inc_call_ctr, &n, grpc_schedule_on_exec_ctx);
-  grpc_endpoint_read(&exec_ctx, f.client_ep, &incoming, &done_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_endpoint_read(f.client_ep, &incoming, &done_closure);
+
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(n == 1);
   GPR_ASSERT(incoming.count == 1);
   GPR_ASSERT(grpc_slice_eq(s, incoming.slices[0]));
 
   grpc_endpoint_shutdown(
-      &exec_ctx, f.client_ep,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_leftover end"));
+      f.client_ep, GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_leftover end"));
   grpc_endpoint_shutdown(
-      &exec_ctx, f.server_ep,
-      GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_leftover end"));
-  grpc_endpoint_destroy(&exec_ctx, f.client_ep);
-  grpc_endpoint_destroy(&exec_ctx, f.server_ep);
-  grpc_exec_ctx_finish(&exec_ctx);
-  grpc_slice_unref_internal(&exec_ctx, s);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &incoming);
+      f.server_ep, GRPC_ERROR_CREATE_FROM_STATIC_STRING("test_leftover end"));
+  grpc_endpoint_destroy(f.client_ep);
+  grpc_endpoint_destroy(f.server_ep);
+
+  grpc_slice_unref_internal(s);
+  grpc_slice_buffer_destroy_internal(&incoming);
 
   clean_up();
 }
 
-static void destroy_pollset(grpc_exec_ctx* exec_ctx, void* p,
-                            grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, (grpc_pollset*)p);
+static void destroy_pollset(void* p, grpc_error* error) {
+  grpc_pollset_destroy((grpc_pollset*)p);
 }
 
 int main(int argc, char** argv) {
   grpc_closure destroyed;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
-
   grpc_init();
-  g_pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
-  grpc_pollset_init(g_pollset, &g_mu);
-  grpc_endpoint_tests(configs[0], g_pollset, g_mu);
-  grpc_endpoint_tests(configs[1], g_pollset, g_mu);
-  test_leftover(configs[2], 1);
-  test_leftover(configs[3], 1);
-  GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
-                    grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
-  grpc_exec_ctx_finish(&exec_ctx);
+
+  {
+    grpc_core::ExecCtx exec_ctx;
+    g_pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+    grpc_pollset_init(g_pollset, &g_mu);
+    grpc_endpoint_tests(configs[0], g_pollset, g_mu);
+    grpc_endpoint_tests(configs[1], g_pollset, g_mu);
+    test_leftover(configs[2], 1);
+    test_leftover(configs[3], 1);
+    GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
+                      grpc_schedule_on_exec_ctx);
+    grpc_pollset_shutdown(g_pollset, &destroyed);
+  }
+
   grpc_shutdown();
 
   gpr_free(g_pollset);
diff --git a/test/core/security/ssl_server_fuzzer.cc b/test/core/security/ssl_server_fuzzer.cc
index bbb2f60..6e30698 100644
--- a/test/core/security/ssl_server_fuzzer.cc
+++ b/test/core/security/ssl_server_fuzzer.cc
@@ -40,8 +40,7 @@
   bool done_callback_called;
 };
 
-static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
-                              grpc_error* error) {
+static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshaker_args* args = static_cast<grpc_handshaker_args*>(arg);
   struct handshake_state* state =
       static_cast<struct handshake_state*>(args->user_data);
@@ -56,66 +55,70 @@
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  {
+    grpc_core::ExecCtx exec_ctx;
 
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("ssl_server_fuzzer");
-  grpc_endpoint* mock_endpoint =
-      grpc_mock_endpoint_create(discard_write, resource_quota);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("ssl_server_fuzzer");
+    grpc_endpoint* mock_endpoint =
+        grpc_mock_endpoint_create(discard_write, resource_quota);
+    grpc_resource_quota_unref_internal(resource_quota);
 
-  grpc_mock_endpoint_put_read(
-      &exec_ctx, mock_endpoint,
-      grpc_slice_from_copied_buffer((const char*)data, size));
+    grpc_mock_endpoint_put_read(
+        mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
 
-  // Load key pair and establish server SSL credentials.
-  grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
-  grpc_slice ca_slice, cert_slice, key_slice;
-  ca_slice = grpc_slice_from_static_string(test_root_cert);
-  cert_slice = grpc_slice_from_static_string(test_server1_cert);
-  key_slice = grpc_slice_from_static_string(test_server1_key);
-  const char* ca_cert = (const char*)GRPC_SLICE_START_PTR(ca_slice);
-  pem_key_cert_pair.private_key = (const char*)GRPC_SLICE_START_PTR(key_slice);
-  pem_key_cert_pair.cert_chain = (const char*)GRPC_SLICE_START_PTR(cert_slice);
-  grpc_server_credentials* creds = grpc_ssl_server_credentials_create(
-      ca_cert, &pem_key_cert_pair, 1, 0, nullptr);
+    // Load key pair and establish server SSL credentials.
+    grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
+    grpc_slice ca_slice, cert_slice, key_slice;
+    ca_slice = grpc_slice_from_static_string(test_root_cert);
+    cert_slice = grpc_slice_from_static_string(test_server1_cert);
+    key_slice = grpc_slice_from_static_string(test_server1_key);
+    const char* ca_cert = (const char*)GRPC_SLICE_START_PTR(ca_slice);
+    pem_key_cert_pair.private_key =
+        (const char*)GRPC_SLICE_START_PTR(key_slice);
+    pem_key_cert_pair.cert_chain =
+        (const char*)GRPC_SLICE_START_PTR(cert_slice);
+    grpc_server_credentials* creds = grpc_ssl_server_credentials_create(
+        ca_cert, &pem_key_cert_pair, 1, 0, nullptr);
 
-  // Create security connector
-  grpc_server_security_connector* sc = nullptr;
-  grpc_security_status status =
-      grpc_server_credentials_create_security_connector(&exec_ctx, creds, &sc);
-  GPR_ASSERT(status == GRPC_SECURITY_OK);
-  grpc_millis deadline = GPR_MS_PER_SEC + grpc_exec_ctx_now(&exec_ctx);
+    // Create security connector
+    grpc_server_security_connector* sc = nullptr;
+    grpc_security_status status =
+        grpc_server_credentials_create_security_connector(creds, &sc);
+    GPR_ASSERT(status == GRPC_SECURITY_OK);
+    grpc_millis deadline = GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now();
 
-  struct handshake_state state;
-  state.done_callback_called = false;
-  grpc_handshake_manager* handshake_mgr = grpc_handshake_manager_create();
-  grpc_server_security_connector_add_handshakers(&exec_ctx, sc, handshake_mgr);
-  grpc_handshake_manager_do_handshake(
-      &exec_ctx, handshake_mgr, mock_endpoint, nullptr /* channel_args */,
-      deadline, nullptr /* acceptor */, on_handshake_done, &state);
-  grpc_exec_ctx_flush(&exec_ctx);
+    struct handshake_state state;
+    state.done_callback_called = false;
+    grpc_handshake_manager* handshake_mgr = grpc_handshake_manager_create();
+    grpc_server_security_connector_add_handshakers(sc, handshake_mgr);
+    grpc_handshake_manager_do_handshake(
+        handshake_mgr, nullptr /* interested_parties */, mock_endpoint,
+        nullptr /* channel_args */, deadline, nullptr /* acceptor */,
+        on_handshake_done, &state);
+    grpc_core::ExecCtx::Get()->Flush();
 
-  // If the given string happens to be part of the correct client hello, the
-  // server will wait for more data. Explicitly fail the server by shutting down
-  // the endpoint.
-  if (!state.done_callback_called) {
-    grpc_endpoint_shutdown(
-        &exec_ctx, mock_endpoint,
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Explicit close"));
-    grpc_exec_ctx_flush(&exec_ctx);
+    // If the given string happens to be part of the correct client hello, the
+    // server will wait for more data. Explicitly fail the server by shutting
+    // down the endpoint.
+    if (!state.done_callback_called) {
+      grpc_endpoint_shutdown(
+          mock_endpoint,
+          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Explicit close"));
+      grpc_core::ExecCtx::Get()->Flush();
+    }
+
+    GPR_ASSERT(state.done_callback_called);
+
+    grpc_handshake_manager_destroy(handshake_mgr);
+    GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "test");
+    grpc_server_credentials_release(creds);
+    grpc_slice_unref(cert_slice);
+    grpc_slice_unref(key_slice);
+    grpc_slice_unref(ca_slice);
+    grpc_core::ExecCtx::Get()->Flush();
   }
 
-  GPR_ASSERT(state.done_callback_called);
-
-  grpc_handshake_manager_destroy(&exec_ctx, handshake_mgr);
-  GRPC_SECURITY_CONNECTOR_UNREF(&exec_ctx, &sc->base, "test");
-  grpc_server_credentials_release(creds);
-  grpc_slice_unref(cert_slice);
-  grpc_slice_unref(key_slice);
-  grpc_slice_unref(ca_slice);
-  grpc_exec_ctx_flush(&exec_ctx);
-
   grpc_shutdown();
   if (leak_check) {
     counters = grpc_memory_counters_snapshot();
diff --git a/test/core/security/verify_jwt.cc b/test/core/security/verify_jwt.cc
index 787d58b..e039970 100644
--- a/test/core/security/verify_jwt.cc
+++ b/test/core/security/verify_jwt.cc
@@ -44,7 +44,7 @@
   exit(1);
 }
 
-static void on_jwt_verification_done(grpc_exec_ctx* exec_ctx, void* user_data,
+static void on_jwt_verification_done(void* user_data,
                                      grpc_jwt_verifier_status status,
                                      grpc_jwt_claims* claims) {
   synchronizer* sync = static_cast<synchronizer*>(user_data);
@@ -57,7 +57,7 @@
         grpc_json_dump_to_string((grpc_json*)grpc_jwt_claims_json(claims), 2);
     printf("Claims: \n\n%s\n", claims_str);
     gpr_free(claims_str);
-    grpc_jwt_claims_destroy(exec_ctx, claims);
+    grpc_jwt_claims_destroy(claims);
   } else {
     GPR_ASSERT(claims == nullptr);
     fprintf(stderr, "Verification failed with error %s\n",
@@ -66,8 +66,7 @@
 
   gpr_mu_lock(sync->mu);
   sync->is_done = 1;
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, sync->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(sync->pollset, nullptr));
   gpr_mu_unlock(sync->mu);
 }
 
@@ -77,7 +76,7 @@
   gpr_cmdline* cl;
   const char* jwt = nullptr;
   const char* aud = nullptr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   grpc_init();
   cl = gpr_cmdline_create("JWT verifier tool");
@@ -96,26 +95,26 @@
   grpc_pollset_init(sync.pollset, &sync.mu);
   sync.is_done = 0;
 
-  grpc_jwt_verifier_verify(&exec_ctx, verifier, sync.pollset, jwt, aud,
+  grpc_jwt_verifier_verify(verifier, sync.pollset, jwt, aud,
                            on_jwt_verification_done, &sync);
 
   gpr_mu_lock(sync.mu);
   while (!sync.is_done) {
     grpc_pollset_worker* worker = nullptr;
-    if (!GRPC_LOG_IF_ERROR("pollset_work",
-                           grpc_pollset_work(&exec_ctx, sync.pollset, &worker,
-                                             GRPC_MILLIS_INF_FUTURE)))
+    if (!GRPC_LOG_IF_ERROR(
+            "pollset_work",
+            grpc_pollset_work(sync.pollset, &worker, GRPC_MILLIS_INF_FUTURE)))
       sync.is_done = true;
     gpr_mu_unlock(sync.mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
     gpr_mu_lock(sync.mu);
   }
   gpr_mu_unlock(sync.mu);
 
   gpr_free(sync.pollset);
 
-  grpc_jwt_verifier_destroy(&exec_ctx, verifier);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_jwt_verifier_destroy(verifier);
+
   gpr_cmdline_destroy(cl);
   grpc_shutdown();
   return !sync.success;
diff --git a/test/core/slice/b64_test.cc b/test/core/slice/b64_test.cc
index 479198f..94785fd 100644
--- a/test/core/slice/b64_test.cc
+++ b/test/core/slice/b64_test.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -44,14 +45,14 @@
   const char* hello = "hello";
   char* hello_b64 =
       grpc_base64_encode(hello, strlen(hello), url_safe, multiline);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice hello_slice = grpc_base64_decode(&exec_ctx, hello_b64, url_safe);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice hello_slice = grpc_base64_decode(hello_b64, url_safe);
   GPR_ASSERT(GRPC_SLICE_LENGTH(hello_slice) == strlen(hello));
   GPR_ASSERT(strncmp((const char*)GRPC_SLICE_START_PTR(hello_slice), hello,
                      GRPC_SLICE_LENGTH(hello_slice)) == 0);
 
-  grpc_slice_unref_internal(&exec_ctx, hello_slice);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_unref_internal(hello_slice);
+
   gpr_free(hello_b64);
 }
 
@@ -64,15 +65,14 @@
 
   /* Try all the different paddings. */
   for (i = 0; i < 3; i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     b64 = grpc_base64_encode(orig, sizeof(orig) - i, url_safe, multiline);
-    orig_decoded = grpc_base64_decode(&exec_ctx, b64, url_safe);
+    orig_decoded = grpc_base64_decode(b64, url_safe);
     GPR_ASSERT(GRPC_SLICE_LENGTH(orig_decoded) == (sizeof(orig) - i));
     GPR_ASSERT(buffers_are_equal(orig, GRPC_SLICE_START_PTR(orig_decoded),
                                  sizeof(orig) - i));
-    grpc_slice_unref_internal(&exec_ctx, orig_decoded);
+    grpc_slice_unref_internal(orig_decoded);
     gpr_free(b64);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -116,19 +116,18 @@
   int url_safe = 1;
   for (i = 0; i < sizeof(orig); i++) orig[i] = (uint8_t)i;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   b64 = grpc_base64_encode(orig, sizeof(orig), url_safe, 0);
-  orig_decoded = grpc_base64_decode(&exec_ctx, b64, !url_safe);
+  orig_decoded = grpc_base64_decode(b64, !url_safe);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(orig_decoded));
   gpr_free(b64);
-  grpc_slice_unref_internal(&exec_ctx, orig_decoded);
+  grpc_slice_unref_internal(orig_decoded);
 
   b64 = grpc_base64_encode(orig, sizeof(orig), !url_safe, 0);
-  orig_decoded = grpc_base64_decode(&exec_ctx, b64, url_safe);
+  orig_decoded = grpc_base64_decode(b64, url_safe);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(orig_decoded));
   gpr_free(b64);
-  grpc_slice_unref_internal(&exec_ctx, orig_decoded);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_slice_unref_internal(orig_decoded);
 }
 
 static void test_rfc4648_test_vectors(void) {
@@ -166,44 +165,44 @@
 static void test_unpadded_decode(void) {
   grpc_slice decoded;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYmFy", 0);
+  grpc_core::ExecCtx exec_ctx;
+  decoded = grpc_base64_decode("Zm9vYmFy", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foobar") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYmE", 0);
+  decoded = grpc_base64_decode("Zm9vYmE", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "fooba") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zm9vYg", 0);
+  decoded = grpc_base64_decode("Zm9vYg", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foob") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zm9v", 0);
+  decoded = grpc_base64_decode("Zm9v", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "foo") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zm8", 0);
+  decoded = grpc_base64_decode("Zm8", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "fo") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "Zg", 0);
+  decoded = grpc_base64_decode("Zg", 0);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(decoded));
   GPR_ASSERT(grpc_slice_str_cmp(decoded, "f") == 0);
   grpc_slice_unref(decoded);
 
-  decoded = grpc_base64_decode(&exec_ctx, "", 0);
+  decoded = grpc_base64_decode("", 0);
   GPR_ASSERT(GRPC_SLICE_IS_EMPTY(decoded));
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_simple_encode_decode_b64_no_multiline();
   test_simple_encode_decode_b64_multiline();
   test_simple_encode_decode_b64_urlsafe_no_multiline();
@@ -215,5 +214,6 @@
   test_url_safe_unsafe_mismatch_failure();
   test_rfc4648_test_vectors();
   test_unpadded_decode();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/slice/percent_decode_fuzzer.cc b/test/core/slice/percent_decode_fuzzer.cc
index 3603177..81eb031 100644
--- a/test/core/slice/percent_decode_fuzzer.cc
+++ b/test/core/slice/percent_decode_fuzzer.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
@@ -31,6 +32,7 @@
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   struct grpc_memory_counters counters;
+  grpc_init();
   grpc_memory_counters_init();
   grpc_slice input = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_slice output;
@@ -46,6 +48,7 @@
   grpc_slice_unref(input);
   counters = grpc_memory_counters_snapshot();
   grpc_memory_counters_destroy();
+  grpc_shutdown();
   GPR_ASSERT(counters.total_size_relative == 0);
   return 0;
 }
diff --git a/test/core/slice/percent_encode_fuzzer.cc b/test/core/slice/percent_encode_fuzzer.cc
index c8e3849..201ae27 100644
--- a/test/core/slice/percent_encode_fuzzer.cc
+++ b/test/core/slice/percent_encode_fuzzer.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
@@ -31,6 +32,7 @@
 
 static void test(const uint8_t* data, size_t size, const uint8_t* dict) {
   struct grpc_memory_counters counters;
+  grpc_init();
   grpc_memory_counters_init();
   grpc_slice input = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_slice output = grpc_percent_encode_slice(input, dict);
@@ -48,6 +50,7 @@
   grpc_slice_unref(permissive_decoded_output);
   counters = grpc_memory_counters_snapshot();
   grpc_memory_counters_destroy();
+  grpc_shutdown();
   GPR_ASSERT(counters.total_size_relative == 0);
 }
 
diff --git a/test/core/slice/percent_encoding_test.cc b/test/core/slice/percent_encoding_test.cc
index 253240f..11f3995 100644
--- a/test/core/slice/percent_encoding_test.cc
+++ b/test/core/slice/percent_encoding_test.cc
@@ -18,6 +18,7 @@
 
 #include "src/core/lib/slice/percent_encoding.h"
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
@@ -118,6 +119,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   TEST_VECTOR(
       "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~",
       "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~",
@@ -140,5 +142,6 @@
                             grpc_url_percent_encoding_unreserved_bytes);
   TEST_NONCONFORMANT_VECTOR("\0", "\0",
                             grpc_url_percent_encoding_unreserved_bytes);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/slice/slice_buffer_test.cc b/test/core/slice/slice_buffer_test.cc
index 338e807..e599867 100644
--- a/test/core/slice/slice_buffer_test.cc
+++ b/test/core/slice/slice_buffer_test.cc
@@ -16,6 +16,7 @@
  *
  */
 
+#include <grpc/grpc.h>
 #include <grpc/slice_buffer.h>
 #include <grpc/support/log.h>
 #include "test/core/util/test_config.h"
@@ -106,9 +107,11 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   test_slice_buffer_add();
   test_slice_buffer_move_first();
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/slice/slice_hash_table_test.cc b/test/core/slice/slice_hash_table_test.cc
index 0ee4e86..9fad9a6 100644
--- a/test/core/slice/slice_hash_table_test.cc
+++ b/test/core/slice/slice_hash_table_test.cc
@@ -59,9 +59,7 @@
   grpc_slice_unref(key);
 }
 
-static void destroy_string(grpc_exec_ctx* exec_ctx, void* value) {
-  gpr_free(value);
-}
+static void destroy_string(void* value) { gpr_free(value); }
 
 static grpc_slice_hash_table* create_table_from_entries(
     const test_entry* test_entries, size_t num_test_entries,
@@ -121,9 +119,8 @@
   check_values(test_entries, num_entries, table);
   check_non_existent_value("XX", table);
   // Clean up.
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_hash_table_unref(&exec_ctx, table);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_hash_table_unref(table);
 }
 
 static int value_cmp_fn(void* a, void* b) {
@@ -149,10 +146,9 @@
       create_table_from_entries(test_entries_b, num_entries_b, value_cmp_fn);
 
   GPR_ASSERT(grpc_slice_hash_table_cmp(table_a, table_b) == 0);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_hash_table_unref(&exec_ctx, table_a);
-  grpc_slice_hash_table_unref(&exec_ctx, table_b);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_hash_table_unref(table_a);
+  grpc_slice_hash_table_unref(table_b);
 }
 
 static void test_slice_hash_table_not_eq() {
@@ -221,23 +217,24 @@
       create_table_from_entries(test_entries_h, num_entries_h, pointer_cmp_fn);
   GPR_ASSERT(grpc_slice_hash_table_cmp(table_g, table_h) != 0);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_slice_hash_table_unref(&exec_ctx, table_a);
-  grpc_slice_hash_table_unref(&exec_ctx, table_b_larger);
-  grpc_slice_hash_table_unref(&exec_ctx, table_b_smaller);
-  grpc_slice_hash_table_unref(&exec_ctx, table_c);
-  grpc_slice_hash_table_unref(&exec_ctx, table_d);
-  grpc_slice_hash_table_unref(&exec_ctx, table_e);
-  grpc_slice_hash_table_unref(&exec_ctx, table_f);
-  grpc_slice_hash_table_unref(&exec_ctx, table_g);
-  grpc_slice_hash_table_unref(&exec_ctx, table_h);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_slice_hash_table_unref(table_a);
+  grpc_slice_hash_table_unref(table_b_larger);
+  grpc_slice_hash_table_unref(table_b_smaller);
+  grpc_slice_hash_table_unref(table_c);
+  grpc_slice_hash_table_unref(table_d);
+  grpc_slice_hash_table_unref(table_e);
+  grpc_slice_hash_table_unref(table_f);
+  grpc_slice_hash_table_unref(table_g);
+  grpc_slice_hash_table_unref(table_h);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_core::ExecCtx::GlobalInit();
   test_slice_hash_table();
   test_slice_hash_table_eq();
   test_slice_hash_table_not_eq();
+  grpc_core::ExecCtx::GlobalShutdown();
   return 0;
 }
diff --git a/test/core/slice/slice_string_helpers_test.cc b/test/core/slice/slice_string_helpers_test.cc
index 260f8c8..f1d4704 100644
--- a/test/core/slice/slice_string_helpers_test.cc
+++ b/test/core/slice/slice_string_helpers_test.cc
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
@@ -130,7 +131,9 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_dump_slice();
   test_strsplit();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/slice/slice_test.cc b/test/core/slice/slice_test.cc
index 02f6b1e..e40154d 100644
--- a/test/core/slice/slice_test.cc
+++ b/test/core/slice/slice_test.cc
@@ -292,6 +292,7 @@
 int main(int argc, char** argv) {
   unsigned length;
   grpc_test_init(argc, argv);
+  grpc_init();
   test_slice_malloc_returns_something_sensible();
   test_slice_new_returns_something_sensible();
   test_slice_new_with_user_data();
@@ -305,5 +306,6 @@
   test_slice_interning();
   test_static_slice_interning();
   test_static_slice_copy_interning();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/support/arena_test.cc b/test/core/support/arena_test.cc
index 244d860..ada0f43 100644
--- a/test/core/support/arena_test.cc
+++ b/test/core/support/arena_test.cc
@@ -100,7 +100,8 @@
   for (int i = 0; i < CONCURRENT_TEST_THREADS; i++) {
     gpr_thd_options opt = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&opt);
-    gpr_thd_new(&thds[i], concurrent_test_body, &args, &opt);
+    gpr_thd_new(&thds[i], "grpc_concurrent_test", concurrent_test_body, &args,
+                &opt);
   }
 
   gpr_event_set(&args.ev_start, (void*)1);
diff --git a/test/core/support/cpu_test.cc b/test/core/support/cpu_test.cc
index 770b074..334c431 100644
--- a/test/core/support/cpu_test.cc
+++ b/test/core/support/cpu_test.cc
@@ -110,7 +110,8 @@
   gpr_cv_init(&ct.done_cv);
   ct.is_done = 0;
   for (i = 0; i < ct.ncores * 3; i++) {
-    GPR_ASSERT(gpr_thd_new(&thd, &worker_thread, &ct, nullptr));
+    GPR_ASSERT(
+        gpr_thd_new(&thd, "grpc_cpu_test", &worker_thread, &ct, nullptr));
   }
   gpr_mu_lock(&ct.mu);
   while (!ct.is_done) {
diff --git a/test/core/support/mpscq_test.cc b/test/core/support/mpscq_test.cc
index 50ff817..1b83f7d 100644
--- a/test/core/support/mpscq_test.cc
+++ b/test/core/support/mpscq_test.cc
@@ -85,7 +85,8 @@
     ta[i].ctr = 0;
     ta[i].q = &q;
     ta[i].start = &start;
-    GPR_ASSERT(gpr_thd_new(&thds[i], test_thread, &ta[i], &options));
+    GPR_ASSERT(
+        gpr_thd_new(&thds[i], "grpc_mt_test", test_thread, &ta[i], &options));
   }
   size_t num_done = 0;
   size_t spins = 0;
@@ -156,7 +157,8 @@
     ta[i].ctr = 0;
     ta[i].q = &q;
     ta[i].start = &start;
-    GPR_ASSERT(gpr_thd_new(&thds[i], test_thread, &ta[i], &options));
+    GPR_ASSERT(gpr_thd_new(&thds[i], "grpc_multipop_test", test_thread, &ta[i],
+                           &options));
   }
   pull_args pa;
   pa.ta = ta;
@@ -169,7 +171,8 @@
   for (size_t i = 0; i < GPR_ARRAY_SIZE(pull_thds); i++) {
     gpr_thd_options options = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&options);
-    GPR_ASSERT(gpr_thd_new(&pull_thds[i], pull_thread, &pa, &options));
+    GPR_ASSERT(gpr_thd_new(&pull_thds[i], "grpc_multipop_pull", pull_thread,
+                           &pa, &options));
   }
   gpr_event_set(&start, (void*)1);
   for (size_t i = 0; i < GPR_ARRAY_SIZE(pull_thds); i++) {
diff --git a/test/core/support/spinlock_test.cc b/test/core/support/spinlock_test.cc
index 3639802..58d5fcd 100644
--- a/test/core/support/spinlock_test.cc
+++ b/test/core/support/spinlock_test.cc
@@ -67,7 +67,8 @@
   for (i = 0; i != m->thread_count; i++) {
     gpr_thd_options opt = gpr_thd_options_default();
     gpr_thd_options_set_joinable(&opt);
-    GPR_ASSERT(gpr_thd_new(&m->threads[i], body, m, &opt));
+    GPR_ASSERT(
+        gpr_thd_new(&m->threads[i], "grpc_create_threads", body, m, &opt));
   }
 }
 
diff --git a/test/core/support/sync_test.cc b/test/core/support/sync_test.cc
index c882488..fb7ec44 100644
--- a/test/core/support/sync_test.cc
+++ b/test/core/support/sync_test.cc
@@ -189,7 +189,7 @@
   gpr_thd_id id;
   int i;
   for (i = 0; i != m->threads; i++) {
-    GPR_ASSERT(gpr_thd_new(&id, body, m, nullptr));
+    GPR_ASSERT(gpr_thd_new(&id, "grpc_create_threads", body, m, nullptr));
   }
 }
 
@@ -244,7 +244,7 @@
     m = test_new(10, iterations, incr_step);
     if (extra != nullptr) {
       gpr_thd_id id;
-      GPR_ASSERT(gpr_thd_new(&id, extra, m, nullptr));
+      GPR_ASSERT(gpr_thd_new(&id, name, extra, m, nullptr));
       m->done++; /* one more thread to wait for */
     }
     test_create_threads(m, body);
diff --git a/test/core/support/thd_test.cc b/test/core/support/thd_test.cc
index 34befd8..b755bf1 100644
--- a/test/core/support/thd_test.cc
+++ b/test/core/support/thd_test.cc
@@ -74,7 +74,7 @@
   t.n = NUM_THREADS;
   t.is_done = 0;
   for (i = 0; i < NUM_THREADS; i++) {
-    GPR_ASSERT(gpr_thd_new(&thd, &thd_body, &t, nullptr));
+    GPR_ASSERT(gpr_thd_new(&thd, "grpc_thread_test", &thd_body, &t, nullptr));
   }
   gpr_mu_lock(&t.mu);
   while (!t.is_done) {
@@ -84,7 +84,8 @@
   GPR_ASSERT(t.n == 0);
   gpr_thd_options_set_joinable(&options);
   for (i = 0; i < NUM_THREADS; i++) {
-    GPR_ASSERT(gpr_thd_new(&thds[i], &thd_body_joinable, nullptr, &options));
+    GPR_ASSERT(gpr_thd_new(&thds[i], "grpc_joinable_thread_test",
+                           &thd_body_joinable, nullptr, &options));
   }
   for (i = 0; i < NUM_THREADS; i++) {
     gpr_thd_join(thds[i]);
diff --git a/test/core/support/tls_test.cc b/test/core/support/tls_test.cc
index 0f64d2e..743b10f 100644
--- a/test/core/support/tls_test.cc
+++ b/test/core/support/tls_test.cc
@@ -56,7 +56,7 @@
   gpr_thd_options_set_joinable(&opt);
 
   for (i = 0; i < NUM_THREADS; i++) {
-    gpr_thd_new(&threads[i], thd_body, nullptr, &opt);
+    gpr_thd_new(&threads[i], "grpc_tls_test", thd_body, nullptr, &opt);
   }
   for (i = 0; i < NUM_THREADS; i++) {
     gpr_thd_join(threads[i]);
diff --git a/test/core/surface/byte_buffer_reader_test.cc b/test/core/surface/byte_buffer_reader_test.cc
index e5d2d7c..94a8615 100644
--- a/test/core/surface/byte_buffer_reader_test.cc
+++ b/test/core/surface/byte_buffer_reader_test.cc
@@ -132,10 +132,8 @@
   memset(GRPC_SLICE_START_PTR(input_slice), 'a', input_size);
   grpc_slice_buffer_add(&sliceb_in, input_slice); /* takes ownership */
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GPR_ASSERT(
-        grpc_msg_compress(&exec_ctx, algorithm, &sliceb_in, &sliceb_out));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    GPR_ASSERT(grpc_msg_compress(algorithm, &sliceb_in, &sliceb_out));
   }
 
   buffer = grpc_raw_compressed_byte_buffer_create(sliceb_out.slices,
@@ -267,6 +265,7 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_read_one_slice();
   test_read_one_slice_malloc();
   test_read_none_compressed_slice();
@@ -276,5 +275,6 @@
   test_byte_buffer_from_reader();
   test_byte_buffer_copy();
   test_readall();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/surface/channel_create_test.cc b/test/core/surface/channel_create_test.cc
index f358b0f..37247f8 100644
--- a/test/core/surface/channel_create_test.cc
+++ b/test/core/surface/channel_create_test.cc
@@ -35,11 +35,10 @@
   chan = grpc_insecure_channel_create("blah://blah", nullptr, nullptr);
   GPR_ASSERT(chan != nullptr);
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_channel_element* elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
-  grpc_exec_ctx_finish(&exec_ctx);
 
   grpc_channel_destroy(chan);
 }
diff --git a/test/core/surface/completion_queue_test.cc b/test/core/surface/completion_queue_test.cc
index c6e13d2..fefbb3c 100644
--- a/test/core/surface/completion_queue_test.cc
+++ b/test/core/surface/completion_queue_test.cc
@@ -121,8 +121,7 @@
   }
 }
 
-static void do_nothing_end_completion(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_cq_completion* c) {}
+static void do_nothing_end_completion(void* arg, grpc_cq_completion* c) {}
 
 static void test_cq_end_op(void) {
   grpc_event ev;
@@ -131,8 +130,6 @@
   grpc_cq_polling_type polling_types[] = {
       GRPC_CQ_DEFAULT_POLLING, GRPC_CQ_NON_LISTENING, GRPC_CQ_NON_POLLING};
   grpc_completion_queue_attributes attr;
-  grpc_exec_ctx init_exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx exec_ctx;
   void* tag = create_test_tag();
 
   LOG_TEST("test_cq_end_op");
@@ -140,14 +137,14 @@
   attr.version = 1;
   attr.cq_completion_type = GRPC_CQ_NEXT;
   for (size_t i = 0; i < GPR_ARRAY_SIZE(polling_types); i++) {
-    exec_ctx = init_exec_ctx;  // Reset exec_ctx
+    grpc_core::ExecCtx exec_ctx;
     attr.cq_polling_type = polling_types[i];
     cc = grpc_completion_queue_create(
         grpc_completion_queue_factory_lookup(&attr), &attr, nullptr);
 
     GPR_ASSERT(grpc_cq_begin_op(cc, tag));
-    grpc_cq_end_op(&exec_ctx, cc, tag, GRPC_ERROR_NONE,
-                   do_nothing_end_completion, nullptr, &completion);
+    grpc_cq_end_op(cc, tag, GRPC_ERROR_NONE, do_nothing_end_completion, nullptr,
+                   &completion);
 
     ev = grpc_completion_queue_next(cc, gpr_inf_past(GPR_CLOCK_REALTIME),
                                     nullptr);
@@ -156,7 +153,6 @@
     GPR_ASSERT(ev.success);
 
     shutdown_and_destroy(cc);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -167,8 +163,6 @@
   grpc_cq_polling_type polling_types[] = {
       GRPC_CQ_DEFAULT_POLLING, GRPC_CQ_NON_LISTENING, GRPC_CQ_NON_POLLING};
   grpc_completion_queue_attributes attr;
-  grpc_exec_ctx init_exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx exec_ctx;
   void* tag = create_test_tag();
   void* res_tag;
   int ok;
@@ -178,15 +172,15 @@
   attr.version = 1;
   attr.cq_completion_type = GRPC_CQ_NEXT;
   for (size_t i = 0; i < GPR_ARRAY_SIZE(polling_types); i++) {
-    exec_ctx = init_exec_ctx;  // Reset exec_ctx
+    grpc_core::ExecCtx exec_ctx;  // Reset exec_ctx
     attr.cq_polling_type = polling_types[i];
     cc = grpc_completion_queue_create(
         grpc_completion_queue_factory_lookup(&attr), &attr, nullptr);
 
     grpc_completion_queue_thread_local_cache_init(cc);
     GPR_ASSERT(grpc_cq_begin_op(cc, tag));
-    grpc_cq_end_op(&exec_ctx, cc, tag, GRPC_ERROR_NONE,
-                   do_nothing_end_completion, nullptr, &completion);
+    grpc_cq_end_op(cc, tag, GRPC_ERROR_NONE, do_nothing_end_completion, nullptr,
+                   &completion);
 
     ev = grpc_completion_queue_next(cc, gpr_inf_past(GPR_CLOCK_REALTIME),
                                     nullptr);
@@ -202,7 +196,6 @@
     GPR_ASSERT(ev.type == GRPC_QUEUE_TIMEOUT);
 
     shutdown_and_destroy(cc);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -211,8 +204,6 @@
   grpc_cq_polling_type polling_types[] = {
       GRPC_CQ_DEFAULT_POLLING, GRPC_CQ_NON_LISTENING, GRPC_CQ_NON_POLLING};
   grpc_completion_queue_attributes attr;
-  grpc_exec_ctx init_exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx exec_ctx;
   void* res_tag;
   int ok;
 
@@ -221,7 +212,7 @@
   attr.version = 1;
   attr.cq_completion_type = GRPC_CQ_NEXT;
   for (size_t i = 0; i < GPR_ARRAY_SIZE(polling_types); i++) {
-    exec_ctx = init_exec_ctx;  // Reset exec_ctx
+    grpc_core::ExecCtx exec_ctx;  // Reset exec_ctx
     attr.cq_polling_type = polling_types[i];
     cc = grpc_completion_queue_create(
         grpc_completion_queue_factory_lookup(&attr), &attr, nullptr);
@@ -232,7 +223,6 @@
     GPR_ASSERT(
         grpc_completion_queue_thread_local_cache_flush(cc, &res_tag, &ok) == 0);
     shutdown_and_destroy(cc);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
@@ -289,8 +279,6 @@
   grpc_cq_polling_type polling_types[] = {
       GRPC_CQ_DEFAULT_POLLING, GRPC_CQ_NON_LISTENING, GRPC_CQ_NON_POLLING};
   grpc_completion_queue_attributes attr;
-  grpc_exec_ctx init_exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_exec_ctx exec_ctx;
   unsigned i, j;
 
   LOG_TEST("test_pluck");
@@ -305,15 +293,15 @@
   attr.version = 1;
   attr.cq_completion_type = GRPC_CQ_PLUCK;
   for (size_t pidx = 0; pidx < GPR_ARRAY_SIZE(polling_types); pidx++) {
-    exec_ctx = init_exec_ctx;  // reset exec_ctx
+    grpc_core::ExecCtx exec_ctx;  // reset exec_ctx
     attr.cq_polling_type = polling_types[pidx];
     cc = grpc_completion_queue_create(
         grpc_completion_queue_factory_lookup(&attr), &attr, nullptr);
 
     for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
       GPR_ASSERT(grpc_cq_begin_op(cc, tags[i]));
-      grpc_cq_end_op(&exec_ctx, cc, tags[i], GRPC_ERROR_NONE,
-                     do_nothing_end_completion, nullptr, &completions[i]);
+      grpc_cq_end_op(cc, tags[i], GRPC_ERROR_NONE, do_nothing_end_completion,
+                     nullptr, &completions[i]);
     }
 
     for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
@@ -324,8 +312,8 @@
 
     for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
       GPR_ASSERT(grpc_cq_begin_op(cc, tags[i]));
-      grpc_cq_end_op(&exec_ctx, cc, tags[i], GRPC_ERROR_NONE,
-                     do_nothing_end_completion, nullptr, &completions[i]);
+      grpc_cq_end_op(cc, tags[i], GRPC_ERROR_NONE, do_nothing_end_completion,
+                     nullptr, &completions[i]);
     }
 
     for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
@@ -336,7 +324,6 @@
     }
 
     shutdown_and_destroy(cc);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 }
 
diff --git a/test/core/surface/completion_queue_threading_test.cc b/test/core/surface/completion_queue_threading_test.cc
index af54e00..4a9e818 100644
--- a/test/core/surface/completion_queue_threading_test.cc
+++ b/test/core/surface/completion_queue_threading_test.cc
@@ -59,8 +59,7 @@
   grpc_completion_queue_destroy(cc);
 }
 
-static void do_nothing_end_completion(grpc_exec_ctx* exec_ctx, void* arg,
-                                      grpc_cq_completion* c) {}
+static void do_nothing_end_completion(void* arg, grpc_cq_completion* c) {}
 
 struct thread_state {
   grpc_completion_queue* cc;
@@ -81,7 +80,7 @@
   gpr_thd_id thread_ids[GPR_ARRAY_SIZE(tags)];
   struct thread_state thread_states[GPR_ARRAY_SIZE(tags)];
   gpr_thd_options thread_options = gpr_thd_options_default();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   unsigned i, j;
 
   LOG_TEST("test_too_many_plucks");
@@ -96,7 +95,8 @@
     }
     thread_states[i].cc = cc;
     thread_states[i].tag = tags[i];
-    gpr_thd_new(thread_ids + i, pluck_one, thread_states + i, &thread_options);
+    gpr_thd_new(thread_ids + i, "grpc_pluck_test", pluck_one, thread_states + i,
+                &thread_options);
   }
 
   /* wait until all other threads are plucking */
@@ -108,8 +108,8 @@
 
   for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
     GPR_ASSERT(grpc_cq_begin_op(cc, tags[i]));
-    grpc_cq_end_op(&exec_ctx, cc, tags[i], GRPC_ERROR_NONE,
-                   do_nothing_end_completion, nullptr, &completions[i]);
+    grpc_cq_end_op(cc, tags[i], GRPC_ERROR_NONE, do_nothing_end_completion,
+                   nullptr, &completions[i]);
   }
 
   for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
@@ -117,7 +117,6 @@
   }
 
   shutdown_and_destroy(cc);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 #define TEST_THREAD_EVENTS 10000
@@ -137,15 +136,13 @@
   return grpc_timeout_seconds_to_deadline(10);
 }
 
-static void free_completion(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_cq_completion* completion) {
+static void free_completion(void* arg, grpc_cq_completion* completion) {
   gpr_free(completion);
 }
 
 static void producer_thread(void* arg) {
   test_thread_options* opt = static_cast<test_thread_options*>(arg);
   int i;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   gpr_log(GPR_INFO, "producer %d started", opt->id);
   gpr_event_set(&opt->on_started, (void*)(intptr_t)1);
@@ -162,17 +159,16 @@
 
   gpr_log(GPR_INFO, "producer %d phase 2", opt->id);
   for (i = 0; i < TEST_THREAD_EVENTS; i++) {
-    grpc_cq_end_op(&exec_ctx, opt->cc, (void*)(intptr_t)1, GRPC_ERROR_NONE,
+    grpc_core::ExecCtx exec_ctx;
+    grpc_cq_end_op(opt->cc, (void*)(intptr_t)1, GRPC_ERROR_NONE,
                    free_completion, nullptr,
                    static_cast<grpc_cq_completion*>(
                        gpr_malloc(sizeof(grpc_cq_completion))));
     opt->events_triggered++;
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   gpr_log(GPR_INFO, "producer %d phase 2 done", opt->id);
   gpr_event_set(&opt->on_finished, (void*)(intptr_t)1);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void consumer_thread(void* arg) {
@@ -234,6 +230,7 @@
     options[i].cc = cc;
     options[i].id = optid++;
     GPR_ASSERT(gpr_thd_new(&id,
+                           i < producers ? "grpc_producer" : "grpc_consumer",
                            i < producers ? producer_thread : consumer_thread,
                            options + i, nullptr));
     gpr_event_wait(&options[i].on_started, ten_seconds_time());
diff --git a/test/core/surface/concurrent_connectivity_test.cc b/test/core/surface/concurrent_connectivity_test.cc
index c7611b0..235d136 100644
--- a/test/core/surface/concurrent_connectivity_test.cc
+++ b/test/core/surface/concurrent_connectivity_test.cc
@@ -103,29 +103,28 @@
   GPR_ASSERT(detag(ev.tag) == 0xd1e);
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* vargs, grpc_endpoint* tcp,
+static void on_connect(void* vargs, grpc_endpoint* tcp,
                        grpc_pollset* accepting_pollset,
                        grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
   struct server_thread_args* args = (struct server_thread_args*)vargs;
-  grpc_endpoint_shutdown(exec_ctx, tcp,
+  grpc_endpoint_shutdown(tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
-  grpc_endpoint_destroy(exec_ctx, tcp);
+  grpc_endpoint_destroy(tcp);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, args->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr));
   gpr_mu_unlock(args->mu);
 }
 
 void bad_server_thread(void* vargs) {
   struct server_thread_args* args = (struct server_thread_args*)vargs;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_resolved_address resolved_addr;
   struct sockaddr_storage* addr = (struct sockaddr_storage*)resolved_addr.addr;
   int port;
   grpc_tcp_server* s;
-  grpc_error* error = grpc_tcp_server_create(&exec_ctx, nullptr, nullptr, &s);
+  grpc_error* error = grpc_tcp_server_create(nullptr, nullptr, &s);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   memset(&resolved_addr, 0, sizeof(resolved_addr));
   addr->ss_family = AF_INET;
@@ -134,35 +133,32 @@
   GPR_ASSERT(port > 0);
   gpr_asprintf(&args->addr, "localhost:%d", port);
 
-  grpc_tcp_server_start(&exec_ctx, s, &args->pollset, 1, on_connect, args);
+  grpc_tcp_server_start(s, &args->pollset, 1, on_connect, args);
   gpr_event_set(&args->ready, (void*)1);
 
   gpr_mu_lock(args->mu);
   while (gpr_atm_acq_load(&args->stop) == 0) {
-    grpc_millis deadline = grpc_exec_ctx_now(&exec_ctx) + 100;
+    grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 100;
 
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(&exec_ctx, args->pollset, &worker, deadline))) {
+            grpc_pollset_work(args->pollset, &worker, deadline))) {
       gpr_atm_rel_store(&args->stop, 1);
     }
     gpr_mu_unlock(args->mu);
-    grpc_exec_ctx_finish(&exec_ctx);
+
     gpr_mu_lock(args->mu);
   }
   gpr_mu_unlock(args->mu);
 
-  grpc_tcp_server_unref(&exec_ctx, s);
-
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_tcp_server_unref(s);
 
   gpr_free(args->addr);
 }
 
-static void done_pollset_shutdown(grpc_exec_ctx* exec_ctx, void* pollset,
-                                  grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(pollset));
+static void done_pollset_shutdown(void* pollset, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(pollset));
   gpr_free(pollset);
 }
 
@@ -182,7 +178,8 @@
   /* First round, no server */
   gpr_log(GPR_DEBUG, "Wave 1");
   for (size_t i = 0; i < NUM_THREADS; ++i) {
-    gpr_thd_new(&threads[i], create_loop_destroy, localhost, &options);
+    gpr_thd_new(&threads[i], "grpc_wave_1", create_loop_destroy, localhost,
+                &options);
   }
   for (size_t i = 0; i < NUM_THREADS; ++i) {
     gpr_thd_join(threads[i]);
@@ -198,10 +195,11 @@
   args.cq = grpc_completion_queue_create_for_next(nullptr);
   grpc_server_register_completion_queue(args.server, args.cq, nullptr);
   grpc_server_start(args.server);
-  gpr_thd_new(&server, server_thread, &args, &options);
+  gpr_thd_new(&server, "grpc_wave_2_server", server_thread, &args, &options);
 
   for (size_t i = 0; i < NUM_THREADS; ++i) {
-    gpr_thd_new(&threads[i], create_loop_destroy, args.addr, &options);
+    gpr_thd_new(&threads[i], "grpc_wave_2", create_loop_destroy, args.addr,
+                &options);
   }
   for (size_t i = 0; i < NUM_THREADS; ++i) {
     gpr_thd_join(threads[i]);
@@ -218,11 +216,13 @@
   args.pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args.pollset, &args.mu);
   gpr_event_init(&args.ready);
-  gpr_thd_new(&server, bad_server_thread, &args, &options);
+  gpr_thd_new(&server, "grpc_wave_3_server", bad_server_thread, &args,
+              &options);
   gpr_event_wait(&args.ready, gpr_inf_future(GPR_CLOCK_MONOTONIC));
 
   for (size_t i = 0; i < NUM_THREADS; ++i) {
-    gpr_thd_new(&threads[i], create_loop_destroy, args.addr, &options);
+    gpr_thd_new(&threads[i], "grpc_wave_3", create_loop_destroy, args.addr,
+                &options);
   }
   for (size_t i = 0; i < NUM_THREADS; ++i) {
     gpr_thd_join(threads[i]);
@@ -230,11 +230,12 @@
 
   gpr_atm_rel_store(&args.stop, 1);
   gpr_thd_join(server);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_pollset_shutdown(&exec_ctx, args.pollset,
-                        GRPC_CLOSURE_CREATE(done_pollset_shutdown, args.pollset,
-                                            grpc_schedule_on_exec_ctx));
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_pollset_shutdown(
+        args.pollset, GRPC_CLOSURE_CREATE(done_pollset_shutdown, args.pollset,
+                                          grpc_schedule_on_exec_ctx));
+  }
 
   grpc_shutdown();
   return 0;
@@ -280,7 +281,8 @@
   gpr_thd_options_set_joinable(&options);
 
   for (size_t i = 0; i < NUM_THREADS; ++i) {
-    gpr_thd_new(&threads[i], watches_with_short_timeouts, localhost, &options);
+    gpr_thd_new(&threads[i], "grpc_short_watches", watches_with_short_timeouts,
+                localhost, &options);
   }
   for (size_t i = 0; i < NUM_THREADS; ++i) {
     gpr_thd_join(threads[i]);
diff --git a/test/core/surface/lame_client_test.cc b/test/core/surface/lame_client_test.cc
index f3df7f3..4bf4056 100644
--- a/test/core/surface/lame_client_test.cc
+++ b/test/core/surface/lame_client_test.cc
@@ -32,20 +32,19 @@
 
 static void* tag(intptr_t x) { return (void*)x; }
 
-void verify_connectivity(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+void verify_connectivity(void* arg, grpc_error* error) {
   grpc_connectivity_state* state = static_cast<grpc_connectivity_state*>(arg);
   GPR_ASSERT(GRPC_CHANNEL_SHUTDOWN == *state);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
 }
 
-void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+void do_nothing(void* arg, grpc_error* error) {}
 
 void test_transport_op(grpc_channel* channel) {
   grpc_transport_op* op;
   grpc_channel_element* elem;
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   GRPC_CLOSURE_INIT(&transport_op_cb, verify_connectivity, &state,
                     grpc_schedule_on_exec_ctx);
@@ -54,14 +53,12 @@
   op->on_connectivity_state_change = &transport_op_cb;
   op->connectivity_state = &state;
   elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
-  elem->filter->start_transport_op(&exec_ctx, elem, op);
-  grpc_exec_ctx_finish(&exec_ctx);
+  elem->filter->start_transport_op(elem, op);
 
   GRPC_CLOSURE_INIT(&transport_op_cb, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
   op = grpc_make_transport_op(&transport_op_cb);
-  elem->filter->start_transport_op(&exec_ctx, elem, op);
-  grpc_exec_ctx_finish(&exec_ctx);
+  elem->filter->start_transport_op(elem, op);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/surface/num_external_connectivity_watchers_test.cc b/test/core/surface/num_external_connectivity_watchers_test.cc
index f78d333..9cdd299 100644
--- a/test/core/surface/num_external_connectivity_watchers_test.cc
+++ b/test/core/surface/num_external_connectivity_watchers_test.cc
@@ -178,9 +178,8 @@
   grpc_channel* channel =
       grpc_secure_channel_create(ssl_creds, addr, new_client_args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
   grpc_channel_credentials_release(ssl_creds);
   return channel;
diff --git a/test/core/surface/secure_channel_create_test.cc b/test/core/surface/secure_channel_create_test.cc
index c31c614..fa22cd6 100644
--- a/test/core/surface/secure_channel_create_test.cc
+++ b/test/core/surface/secure_channel_create_test.cc
@@ -37,10 +37,9 @@
   grpc_channel_element* elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
-  grpc_channel_credentials_unref(&exec_ctx, creds);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CHANNEL_INTERNAL_UNREF(chan, "test");
+  grpc_channel_credentials_unref(creds);
 }
 
 void test_security_connector_already_in_arg(void) {
@@ -56,9 +55,8 @@
   grpc_channel_element* elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CHANNEL_INTERNAL_UNREF(chan, "test");
 }
 
 void test_null_creds(void) {
@@ -67,9 +65,8 @@
   grpc_channel_element* elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(chan), 0);
   GPR_ASSERT(0 == strcmp(elem->filter->name, "lame-client"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, chan, "test");
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_CHANNEL_INTERNAL_UNREF(chan, "test");
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/surface/sequential_connectivity_test.cc b/test/core/surface/sequential_connectivity_test.cc
index 015db92..ac49bd9 100644
--- a/test/core/surface/sequential_connectivity_test.cc
+++ b/test/core/surface/sequential_connectivity_test.cc
@@ -70,7 +70,7 @@
   gpr_thd_id server_thread;
   gpr_thd_options thdopt = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&thdopt);
-  gpr_thd_new(&server_thread, server_thread_func, &sta, &thdopt);
+  gpr_thd_new(&server_thread, "grpc_server", server_thread_func, &sta, &thdopt);
 
   grpc_completion_queue* cq = grpc_completion_queue_create_for_next(nullptr);
   grpc_channel* channels[NUM_CONNECTIONS];
@@ -156,9 +156,8 @@
   grpc_channel* channel =
       grpc_secure_channel_create(ssl_creds, addr, new_client_args, nullptr);
   {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_channel_args_destroy(&exec_ctx, new_client_args);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
+    grpc_channel_args_destroy(new_client_args);
   }
   grpc_channel_credentials_release(ssl_creds);
   return channel;
diff --git a/test/core/transport/bdp_estimator_test.cc b/test/core/transport/bdp_estimator_test.cc
index d127260..445823b 100644
--- a/test/core/transport/bdp_estimator_test.cc
+++ b/test/core/transport/bdp_estimator_test.cc
@@ -58,7 +58,7 @@
 void AddSamples(BdpEstimator* estimator, int64_t* samples, size_t n) {
   estimator->AddIncomingBytes(1234567);
   inc_time();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   estimator->SchedulePing();
   estimator->StartPing();
   for (size_t i = 0; i < n; i++) {
@@ -66,9 +66,8 @@
   }
   gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                                gpr_time_from_millis(1, GPR_TIMESPAN)));
-  grpc_exec_ctx_invalidate_now(&exec_ctx);
-  estimator->CompletePing(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->InvalidateNow();
+  estimator->CompletePing();
 }
 
 void AddSample(BdpEstimator* estimator, int64_t sample) {
diff --git a/test/core/transport/byte_stream_test.cc b/test/core/transport/byte_stream_test.cc
index 0e34fd7..2aab6e9 100644
--- a/test/core/transport/byte_stream_test.cc
+++ b/test/core/transport/byte_stream_test.cc
@@ -18,6 +18,7 @@
 
 #include "src/core/lib/transport/byte_stream.h"
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
@@ -30,14 +31,13 @@
 // grpc_slice_buffer_stream tests
 //
 
-static void not_called_closure(grpc_exec_ctx* exec_ctx, void* arg,
-                               grpc_error* error) {
+static void not_called_closure(void* arg, grpc_error* error) {
   GPR_ASSERT(false);
 }
 
 static void test_slice_buffer_stream_basic(void) {
   gpr_log(GPR_DEBUG, "test_slice_buffer_stream_basic");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -57,23 +57,21 @@
                     grpc_schedule_on_exec_ctx);
   // Read each slice.  Note that next() always returns synchronously.
   for (size_t i = 0; i < GPR_ARRAY_SIZE(input); ++i) {
-    GPR_ASSERT(
-        grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
+    GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
     grpc_slice output;
-    grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+    grpc_error* error = grpc_byte_stream_pull(&stream.base, &output);
     GPR_ASSERT(error == GRPC_ERROR_NONE);
     GPR_ASSERT(grpc_slice_eq(input[i], output));
-    grpc_slice_unref_internal(&exec_ctx, output);
+    grpc_slice_unref_internal(output);
   }
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream.base);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream.base);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 static void test_slice_buffer_stream_shutdown(void) {
   gpr_log(GPR_DEBUG, "test_slice_buffer_stream_shutdown");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -92,29 +90,25 @@
   GRPC_CLOSURE_INIT(&closure, not_called_closure, nullptr,
                     grpc_schedule_on_exec_ctx);
   // Read the first slice.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
+  GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
   grpc_slice output;
-  grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+  grpc_error* error = grpc_byte_stream_pull(&stream.base, &output);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_slice_eq(input[0], output));
-  grpc_slice_unref_internal(&exec_ctx, output);
+  grpc_slice_unref_internal(output);
   // Now shutdown.
   grpc_error* shutdown_error =
       GRPC_ERROR_CREATE_FROM_STATIC_STRING("shutdown error");
-  grpc_byte_stream_shutdown(&exec_ctx, &stream.base,
-                            GRPC_ERROR_REF(shutdown_error));
+  grpc_byte_stream_shutdown(&stream.base, GRPC_ERROR_REF(shutdown_error));
   // After shutdown, the next pull() should return the error.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
-  error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+  GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
+  error = grpc_byte_stream_pull(&stream.base, &output);
   GPR_ASSERT(error == shutdown_error);
   GRPC_ERROR_UNREF(error);
   GRPC_ERROR_UNREF(shutdown_error);
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream.base);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream.base);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 //
@@ -123,7 +117,7 @@
 
 static void test_caching_byte_stream_basic(void) {
   gpr_log(GPR_DEBUG, "test_caching_byte_stream_basic");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer byte stream.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -147,24 +141,22 @@
   // Read each slice.  Note that next() always returns synchronously,
   // because the underlying byte stream always does.
   for (size_t i = 0; i < GPR_ARRAY_SIZE(input); ++i) {
-    GPR_ASSERT(
-        grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
+    GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
     grpc_slice output;
-    grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+    grpc_error* error = grpc_byte_stream_pull(&stream.base, &output);
     GPR_ASSERT(error == GRPC_ERROR_NONE);
     GPR_ASSERT(grpc_slice_eq(input[i], output));
-    grpc_slice_unref_internal(&exec_ctx, output);
+    grpc_slice_unref_internal(output);
   }
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream.base);
-  grpc_byte_stream_cache_destroy(&exec_ctx, &cache);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream.base);
+  grpc_byte_stream_cache_destroy(&cache);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 static void test_caching_byte_stream_reset(void) {
   gpr_log(GPR_DEBUG, "test_caching_byte_stream_reset");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer byte stream.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -186,34 +178,31 @@
   GRPC_CLOSURE_INIT(&closure, not_called_closure, nullptr,
                     grpc_schedule_on_exec_ctx);
   // Read one slice.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
+  GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
   grpc_slice output;
-  grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+  grpc_error* error = grpc_byte_stream_pull(&stream.base, &output);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_slice_eq(input[0], output));
-  grpc_slice_unref_internal(&exec_ctx, output);
+  grpc_slice_unref_internal(output);
   // Reset the caching stream.  The reads should start over from the
   // first slice.
   grpc_caching_byte_stream_reset(&stream);
   for (size_t i = 0; i < GPR_ARRAY_SIZE(input); ++i) {
-    GPR_ASSERT(
-        grpc_byte_stream_next(&exec_ctx, &stream.base, ~(size_t)0, &closure));
-    error = grpc_byte_stream_pull(&exec_ctx, &stream.base, &output);
+    GPR_ASSERT(grpc_byte_stream_next(&stream.base, ~(size_t)0, &closure));
+    error = grpc_byte_stream_pull(&stream.base, &output);
     GPR_ASSERT(error == GRPC_ERROR_NONE);
     GPR_ASSERT(grpc_slice_eq(input[i], output));
-    grpc_slice_unref_internal(&exec_ctx, output);
+    grpc_slice_unref_internal(output);
   }
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream.base);
-  grpc_byte_stream_cache_destroy(&exec_ctx, &cache);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream.base);
+  grpc_byte_stream_cache_destroy(&cache);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 static void test_caching_byte_stream_shared_cache(void) {
   gpr_log(GPR_DEBUG, "test_caching_byte_stream_shared_cache");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   // Create and populate slice buffer byte stream.
   grpc_slice_buffer buffer;
   grpc_slice_buffer_init(&buffer);
@@ -237,43 +226,41 @@
   GRPC_CLOSURE_INIT(&closure, not_called_closure, nullptr,
                     grpc_schedule_on_exec_ctx);
   // Read one slice from stream1.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream1.base, ~(size_t)0, &closure));
+  GPR_ASSERT(grpc_byte_stream_next(&stream1.base, ~(size_t)0, &closure));
   grpc_slice output;
-  grpc_error* error = grpc_byte_stream_pull(&exec_ctx, &stream1.base, &output);
+  grpc_error* error = grpc_byte_stream_pull(&stream1.base, &output);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_slice_eq(input[0], output));
-  grpc_slice_unref_internal(&exec_ctx, output);
+  grpc_slice_unref_internal(output);
   // Read all slices from stream2.
   for (size_t i = 0; i < GPR_ARRAY_SIZE(input); ++i) {
-    GPR_ASSERT(
-        grpc_byte_stream_next(&exec_ctx, &stream2.base, ~(size_t)0, &closure));
-    error = grpc_byte_stream_pull(&exec_ctx, &stream2.base, &output);
+    GPR_ASSERT(grpc_byte_stream_next(&stream2.base, ~(size_t)0, &closure));
+    error = grpc_byte_stream_pull(&stream2.base, &output);
     GPR_ASSERT(error == GRPC_ERROR_NONE);
     GPR_ASSERT(grpc_slice_eq(input[i], output));
-    grpc_slice_unref_internal(&exec_ctx, output);
+    grpc_slice_unref_internal(output);
   }
   // Now read the second slice from stream1.
-  GPR_ASSERT(
-      grpc_byte_stream_next(&exec_ctx, &stream1.base, ~(size_t)0, &closure));
-  error = grpc_byte_stream_pull(&exec_ctx, &stream1.base, &output);
+  GPR_ASSERT(grpc_byte_stream_next(&stream1.base, ~(size_t)0, &closure));
+  error = grpc_byte_stream_pull(&stream1.base, &output);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(grpc_slice_eq(input[1], output));
-  grpc_slice_unref_internal(&exec_ctx, output);
+  grpc_slice_unref_internal(output);
   // Clean up.
-  grpc_byte_stream_destroy(&exec_ctx, &stream1.base);
-  grpc_byte_stream_destroy(&exec_ctx, &stream2.base);
-  grpc_byte_stream_cache_destroy(&exec_ctx, &cache);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &buffer);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_byte_stream_destroy(&stream1.base);
+  grpc_byte_stream_destroy(&stream2.base);
+  grpc_byte_stream_cache_destroy(&cache);
+  grpc_slice_buffer_destroy_internal(&buffer);
 }
 
 int main(int argc, char** argv) {
+  grpc_init();
   grpc_test_init(argc, argv);
   test_slice_buffer_stream_basic();
   test_slice_buffer_stream_shutdown();
   test_caching_byte_stream_basic();
   test_caching_byte_stream_reset();
   test_caching_byte_stream_shared_cache();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/chttp2/BUILD b/test/core/transport/chttp2/BUILD
index 1ea7d03..6eff716 100644
--- a/test/core/transport/chttp2/BUILD
+++ b/test/core/transport/chttp2/BUILD
@@ -115,6 +115,21 @@
 )
 
 grpc_cc_test(
+    name = "settings_timeout_test",
+    srcs = ["settings_timeout_test.cc"],
+    language = "C++",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
+)
+
+grpc_cc_test(
     name = "varint_test",
     srcs = ["varint_test.cc"],
     language = "C++",
diff --git a/test/core/transport/chttp2/bin_decoder_test.cc b/test/core/transport/chttp2/bin_decoder_test.cc
index a29ec8a..6d70a42 100644
--- a/test/core/transport/chttp2/bin_decoder_test.cc
+++ b/test/core/transport/chttp2/bin_decoder_test.cc
@@ -20,6 +20,7 @@
 
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
@@ -29,8 +30,8 @@
 
 static int all_ok = 1;
 
-static void expect_slice_eq(grpc_exec_ctx* exec_ctx, grpc_slice expected,
-                            grpc_slice slice, const char* debug, int line) {
+static void expect_slice_eq(grpc_slice expected, grpc_slice slice,
+                            const char* debug, int line) {
   if (!grpc_slice_eq(slice, expected)) {
     char* hs = grpc_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char* he = grpc_dump_slice(expected, GPR_DUMP_HEX | GPR_DUMP_ASCII);
@@ -40,104 +41,97 @@
     gpr_free(he);
     all_ok = 0;
   }
-  grpc_slice_unref_internal(exec_ctx, expected);
-  grpc_slice_unref_internal(exec_ctx, slice);
+  grpc_slice_unref_internal(expected);
+  grpc_slice_unref_internal(slice);
 }
 
-static grpc_slice base64_encode(grpc_exec_ctx* exec_ctx, const char* s) {
+static grpc_slice base64_encode(const char* s) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
   grpc_slice out = grpc_chttp2_base64_encode(ss);
-  grpc_slice_unref_internal(exec_ctx, ss);
+  grpc_slice_unref_internal(ss);
   return out;
 }
 
-static grpc_slice base64_decode(grpc_exec_ctx* exec_ctx, const char* s) {
+static grpc_slice base64_decode(const char* s) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
-  grpc_slice out = grpc_chttp2_base64_decode(exec_ctx, ss);
-  grpc_slice_unref_internal(exec_ctx, ss);
+  grpc_slice out = grpc_chttp2_base64_decode(ss);
+  grpc_slice_unref_internal(ss);
   return out;
 }
 
-static grpc_slice base64_decode_with_length(grpc_exec_ctx* exec_ctx,
-                                            const char* s,
+static grpc_slice base64_decode_with_length(const char* s,
                                             size_t output_length) {
   grpc_slice ss = grpc_slice_from_copied_string(s);
-  grpc_slice out =
-      grpc_chttp2_base64_decode_with_length(exec_ctx, ss, output_length);
-  grpc_slice_unref_internal(exec_ctx, ss);
+  grpc_slice out = grpc_chttp2_base64_decode_with_length(ss, output_length);
+  grpc_slice_unref_internal(ss);
   return out;
 }
 
-#define EXPECT_SLICE_EQ(exec_ctx, expected, slice)                             \
-  expect_slice_eq(                                                             \
-      exec_ctx, grpc_slice_from_copied_buffer(expected, sizeof(expected) - 1), \
-      slice, #slice, __LINE__);
+#define EXPECT_SLICE_EQ(expected, slice)                                    \
+  expect_slice_eq(                                                          \
+      grpc_slice_from_copied_buffer(expected, sizeof(expected) - 1), slice, \
+      #slice, __LINE__);
 
-#define ENCODE_AND_DECODE(exec_ctx, s)                   \
-  EXPECT_SLICE_EQ(exec_ctx, s,                           \
-                  grpc_chttp2_base64_decode_with_length( \
-                      exec_ctx, base64_encode(exec_ctx, s), strlen(s)));
+#define ENCODE_AND_DECODE(s) \
+  EXPECT_SLICE_EQ(           \
+      s, grpc_chttp2_base64_decode_with_length(base64_encode(s), strlen(s)));
 
 int main(int argc, char** argv) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_init();
+  {
+    grpc_core::ExecCtx exec_ctx;
 
-  /* ENCODE_AND_DECODE tests grpc_chttp2_base64_decode_with_length(), which
-     takes encoded base64 strings without pad chars, but output length is
-     required. */
-  /* Base64 test vectors from RFC 4648 */
-  ENCODE_AND_DECODE(&exec_ctx, "");
-  ENCODE_AND_DECODE(&exec_ctx, "f");
-  ENCODE_AND_DECODE(&exec_ctx, "foo");
-  ENCODE_AND_DECODE(&exec_ctx, "fo");
-  ENCODE_AND_DECODE(&exec_ctx, "foob");
-  ENCODE_AND_DECODE(&exec_ctx, "fooba");
-  ENCODE_AND_DECODE(&exec_ctx, "foobar");
+    /* ENCODE_AND_DECODE tests grpc_chttp2_base64_decode_with_length(), which
+       takes encoded base64 strings without pad chars, but output length is
+       required. */
+    /* Base64 test vectors from RFC 4648 */
+    ENCODE_AND_DECODE("");
+    ENCODE_AND_DECODE("f");
+    ENCODE_AND_DECODE("foo");
+    ENCODE_AND_DECODE("fo");
+    ENCODE_AND_DECODE("foob");
+    ENCODE_AND_DECODE("fooba");
+    ENCODE_AND_DECODE("foobar");
 
-  ENCODE_AND_DECODE(&exec_ctx, "\xc0\xc1\xc2\xc3\xc4\xc5");
+    ENCODE_AND_DECODE("\xc0\xc1\xc2\xc3\xc4\xc5");
 
-  /* Base64 test vectors from RFC 4648, with pad chars */
-  /* BASE64("") = "" */
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, ""));
-  /* BASE64("f") = "Zg==" */
-  EXPECT_SLICE_EQ(&exec_ctx, "f", base64_decode(&exec_ctx, "Zg=="));
-  /* BASE64("fo") = "Zm8=" */
-  EXPECT_SLICE_EQ(&exec_ctx, "fo", base64_decode(&exec_ctx, "Zm8="));
-  /* BASE64("foo") = "Zm9v" */
-  EXPECT_SLICE_EQ(&exec_ctx, "foo", base64_decode(&exec_ctx, "Zm9v"));
-  /* BASE64("foob") = "Zm9vYg==" */
-  EXPECT_SLICE_EQ(&exec_ctx, "foob", base64_decode(&exec_ctx, "Zm9vYg=="));
-  /* BASE64("fooba") = "Zm9vYmE=" */
-  EXPECT_SLICE_EQ(&exec_ctx, "fooba", base64_decode(&exec_ctx, "Zm9vYmE="));
-  /* BASE64("foobar") = "Zm9vYmFy" */
-  EXPECT_SLICE_EQ(&exec_ctx, "foobar", base64_decode(&exec_ctx, "Zm9vYmFy"));
+    /* Base64 test vectors from RFC 4648, with pad chars */
+    /* BASE64("") = "" */
+    EXPECT_SLICE_EQ("", base64_decode(""));
+    /* BASE64("f") = "Zg==" */
+    EXPECT_SLICE_EQ("f", base64_decode("Zg=="));
+    /* BASE64("fo") = "Zm8=" */
+    EXPECT_SLICE_EQ("fo", base64_decode("Zm8="));
+    /* BASE64("foo") = "Zm9v" */
+    EXPECT_SLICE_EQ("foo", base64_decode("Zm9v"));
+    /* BASE64("foob") = "Zm9vYg==" */
+    EXPECT_SLICE_EQ("foob", base64_decode("Zm9vYg=="));
+    /* BASE64("fooba") = "Zm9vYmE=" */
+    EXPECT_SLICE_EQ("fooba", base64_decode("Zm9vYmE="));
+    /* BASE64("foobar") = "Zm9vYmFy" */
+    EXPECT_SLICE_EQ("foobar", base64_decode("Zm9vYmFy"));
 
-  EXPECT_SLICE_EQ(&exec_ctx, "\xc0\xc1\xc2\xc3\xc4\xc5",
-                  base64_decode(&exec_ctx, "wMHCw8TF"));
+    EXPECT_SLICE_EQ("\xc0\xc1\xc2\xc3\xc4\xc5", base64_decode("wMHCw8TF"));
 
-  // Test illegal input length in grpc_chttp2_base64_decode
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "a"));
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "ab"));
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "abc"));
+    // Test illegal input length in grpc_chttp2_base64_decode
+    EXPECT_SLICE_EQ("", base64_decode("a"));
+    EXPECT_SLICE_EQ("", base64_decode("ab"));
+    EXPECT_SLICE_EQ("", base64_decode("abc"));
 
-  // Test illegal charactors in grpc_chttp2_base64_decode
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "Zm:v"));
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode(&exec_ctx, "Zm=v"));
+    // Test illegal charactors in grpc_chttp2_base64_decode
+    EXPECT_SLICE_EQ("", base64_decode("Zm:v"));
+    EXPECT_SLICE_EQ("", base64_decode("Zm=v"));
 
-  // Test output_length longer than max possible output length in
-  // grpc_chttp2_base64_decode_with_length
-  EXPECT_SLICE_EQ(&exec_ctx, "", base64_decode_with_length(&exec_ctx, "Zg", 2));
-  EXPECT_SLICE_EQ(&exec_ctx, "",
-                  base64_decode_with_length(&exec_ctx, "Zm8", 3));
-  EXPECT_SLICE_EQ(&exec_ctx, "",
-                  base64_decode_with_length(&exec_ctx, "Zm9v", 4));
+    // Test output_length longer than max possible output length in
+    // grpc_chttp2_base64_decode_with_length
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zg", 2));
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zm8", 3));
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zm9v", 4));
 
-  // Test illegal charactors in grpc_chttp2_base64_decode_with_length
-  EXPECT_SLICE_EQ(&exec_ctx, "",
-                  base64_decode_with_length(&exec_ctx, "Zm:v", 3));
-  EXPECT_SLICE_EQ(&exec_ctx, "",
-                  base64_decode_with_length(&exec_ctx, "Zm=v", 3));
-
-  grpc_exec_ctx_finish(&exec_ctx);
-
+    // Test illegal charactors in grpc_chttp2_base64_decode_with_length
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zm:v", 3));
+    EXPECT_SLICE_EQ("", base64_decode_with_length("Zm=v", 3));
+  }
+  grpc_shutdown();
   return all_ok ? 0 : 1;
 }
diff --git a/test/core/transport/chttp2/bin_encoder_test.cc b/test/core/transport/chttp2/bin_encoder_test.cc
index 78b8808..44f5de8 100644
--- a/test/core/transport/chttp2/bin_encoder_test.cc
+++ b/test/core/transport/chttp2/bin_encoder_test.cc
@@ -99,6 +99,8 @@
 }
 
 int main(int argc, char** argv) {
+  grpc_init();
+
   /* Base64 test vectors from RFC 4648, with padding removed */
   /* BASE64("") = "" */
   EXPECT_SLICE_EQ("", B64(""));
@@ -169,5 +171,6 @@
   expect_binary_header("foo-bar", 0);
   expect_binary_header("-bin", 0);
 
+  grpc_shutdown();
   return all_ok ? 0 : 1;
 }
diff --git a/test/core/transport/chttp2/hpack_encoder_test.cc b/test/core/transport/chttp2/hpack_encoder_test.cc
index 2d18b72..d2dbd4a 100644
--- a/test/core/transport/chttp2/hpack_encoder_test.cc
+++ b/test/core/transport/chttp2/hpack_encoder_test.cc
@@ -51,8 +51,8 @@
 
 /* verify that the output generated by encoding the stream matches the
    hexstring passed in */
-static void verify(grpc_exec_ctx* exec_ctx, const verify_params params,
-                   const char* expected, size_t nheaders, ...) {
+static void verify(const verify_params params, const char* expected,
+                   size_t nheaders, ...) {
   grpc_slice_buffer output;
   grpc_slice merged;
   grpc_slice expect = parse_hexstring(expected);
@@ -77,8 +77,7 @@
       value_slice = grpc_slice_intern(value_slice);
     }
     e[i].md = grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string(key)),
-        value_slice);
+        grpc_slice_intern(grpc_slice_from_static_string(key)), value_slice);
   }
   e[0].prev = nullptr;
   e[nheaders - 1].next = nullptr;
@@ -106,11 +105,10 @@
       16384,                           /* max_frame_size */
       &stats                           /* stats */
   };
-  grpc_chttp2_encode_header(exec_ctx, &g_compressor, nullptr, 0, &b, &hopt,
-                            &output);
+  grpc_chttp2_encode_header(&g_compressor, nullptr, 0, &b, &hopt, &output);
   merged = grpc_slice_merge(output.slices, output.count);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &output);
-  grpc_metadata_batch_destroy(exec_ctx, &b);
+  grpc_slice_buffer_destroy_internal(&output);
+  grpc_metadata_batch_destroy(&b);
 
   if (!grpc_slice_eq(merged, expect)) {
     char* expect_str = grpc_dump_slice(expect, GPR_DUMP_HEX | GPR_DUMP_ASCII);
@@ -123,11 +121,11 @@
     g_failure = 1;
   }
 
-  grpc_slice_unref_internal(exec_ctx, merged);
-  grpc_slice_unref_internal(exec_ctx, expect);
+  grpc_slice_unref_internal(merged);
+  grpc_slice_unref_internal(expect);
 }
 
-static void test_basic_headers(grpc_exec_ctx* exec_ctx) {
+static void test_basic_headers() {
   int i;
 
   verify_params params = {
@@ -135,24 +133,22 @@
       false,
       false,
   };
-  verify(exec_ctx, params, "000005 0104 deadbeef 40 0161 0161", 1, "a", "a");
-  verify(exec_ctx, params, "000001 0104 deadbeef be", 1, "a", "a");
-  verify(exec_ctx, params, "000001 0104 deadbeef be", 1, "a", "a");
-  verify(exec_ctx, params, "000006 0104 deadbeef be 40 0162 0163", 2, "a", "a",
-         "b", "c");
-  verify(exec_ctx, params, "000002 0104 deadbeef bf be", 2, "a", "a", "b", "c");
-  verify(exec_ctx, params, "000004 0104 deadbeef 7f 00 0164", 1, "a", "d");
+  verify(params, "000005 0104 deadbeef 40 0161 0161", 1, "a", "a");
+  verify(params, "000001 0104 deadbeef be", 1, "a", "a");
+  verify(params, "000001 0104 deadbeef be", 1, "a", "a");
+  verify(params, "000006 0104 deadbeef be 40 0162 0163", 2, "a", "a", "b", "c");
+  verify(params, "000002 0104 deadbeef bf be", 2, "a", "a", "b", "c");
+  verify(params, "000004 0104 deadbeef 7f 00 0164", 1, "a", "d");
 
   /* flush out what's there to make a few values look very popular */
   for (i = 0; i < 350; i++) {
-    verify(exec_ctx, params, "000003 0104 deadbeef c0 bf be", 3, "a", "a", "b",
-           "c", "a", "d");
+    verify(params, "000003 0104 deadbeef c0 bf be", 3, "a", "a", "b", "c", "a",
+           "d");
   }
 
-  verify(exec_ctx, params, "000006 0104 deadbeef c0 00 016b 0176", 2, "a", "a",
-         "k", "v");
+  verify(params, "000006 0104 deadbeef c0 00 016b 0176", 2, "a", "a", "k", "v");
   /* this could be 000004 0104 deadbeef 0f 30 0176 also */
-  verify(exec_ctx, params, "000004 0104 deadbeef 0f 2f 0176", 1, "a", "v");
+  verify(params, "000004 0104 deadbeef 0f 2f 0176", 1, "a", "v");
 }
 
 static void encode_int_to_str(int i, char* p) {
@@ -163,7 +159,7 @@
   p[2] = 0;
 }
 
-static void test_decode_table_overflow(grpc_exec_ctx* exec_ctx) {
+static void test_decode_table_overflow() {
   int i;
   char key[3], value[3];
   char* expect;
@@ -192,26 +188,24 @@
     }
 
     if (i > 0) {
-      verify(exec_ctx, params, expect, 2, "aa", "ba", key, value);
+      verify(params, expect, 2, "aa", "ba", key, value);
     } else {
-      verify(exec_ctx, params, expect, 1, key, value);
+      verify(params, expect, 1, key, value);
     }
     gpr_free(expect);
   }
 
   /* if the above passes, then we must have just knocked this pair out of the
      decoder stack, and so we'll be forced to re-encode it */
-  verify(exec_ctx, params, "000007 0104 deadbeef 40 026161 026261", 1, "aa",
-         "ba");
+  verify(params, "000007 0104 deadbeef 40 026161 026261", 1, "aa", "ba");
 }
 
-static void verify_table_size_change_match_elem_size(grpc_exec_ctx* exec_ctx,
-                                                     const char* key,
+static void verify_table_size_change_match_elem_size(const char* key,
                                                      const char* value,
                                                      bool use_true_binary) {
   grpc_slice_buffer output;
   grpc_mdelem elem = grpc_mdelem_from_slices(
-      exec_ctx, grpc_slice_intern(grpc_slice_from_static_string(key)),
+      grpc_slice_intern(grpc_slice_from_static_string(key)),
       grpc_slice_intern(grpc_slice_from_static_string(value)));
   size_t elem_size = grpc_mdelem_get_size_in_hpack_table(elem, use_true_binary);
   size_t initial_table_size = g_compressor.table_size;
@@ -235,41 +229,38 @@
       use_true_binary, /* use_true_binary_metadata */
       16384,           /* max_frame_size */
       &stats /* stats */};
-  grpc_chttp2_encode_header(exec_ctx, &g_compressor, nullptr, 0, &b, &hopt,
-                            &output);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &output);
-  grpc_metadata_batch_destroy(exec_ctx, &b);
+  grpc_chttp2_encode_header(&g_compressor, nullptr, 0, &b, &hopt, &output);
+  grpc_slice_buffer_destroy_internal(&output);
+  grpc_metadata_batch_destroy(&b);
 
   GPR_ASSERT(g_compressor.table_size == elem_size + initial_table_size);
   gpr_free(e);
 }
 
-static void test_encode_header_size(grpc_exec_ctx* exec_ctx) {
-  verify_table_size_change_match_elem_size(exec_ctx, "hello", "world", false);
-  verify_table_size_change_match_elem_size(exec_ctx, "hello-bin", "world",
-                                           false);
-  verify_table_size_change_match_elem_size(exec_ctx, "true-binary-bin",
+static void test_encode_header_size() {
+  verify_table_size_change_match_elem_size("hello", "world", false);
+  verify_table_size_change_match_elem_size("hello-bin", "world", false);
+  verify_table_size_change_match_elem_size("true-binary-bin",
                                            "I_am_true_binary_value", true);
 }
 
-static void test_interned_key_indexed(grpc_exec_ctx* exec_ctx) {
+static void test_interned_key_indexed() {
   int i;
   verify_params params = {false, false, true};
-  verify(exec_ctx, params, "000009 0104 deadbeef 40 0161 0162 0f2f 0163", 2,
-         "a", "b", "a", "c");
+  verify(params, "000009 0104 deadbeef 40 0161 0162 0f2f 0163", 2, "a", "b",
+         "a", "c");
   for (i = 0; i < 10; i++) {
-    verify(exec_ctx, params, "000008 0104 deadbeef 0f2f 0162 0f2f 0163", 2, "a",
-           "b", "a", "c");
+    verify(params, "000008 0104 deadbeef 0f2f 0162 0f2f 0163", 2, "a", "b", "a",
+           "c");
   }
 }
 
-static void run_test(void (*test)(grpc_exec_ctx* exec_ctx), const char* name) {
+static void run_test(void (*test)(), const char* name) {
   gpr_log(GPR_INFO, "RUN TEST: %s", name);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hpack_compressor_init(&g_compressor);
-  test(&exec_ctx);
-  grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &g_compressor);
-  grpc_exec_ctx_finish(&exec_ctx);
+  test();
+  grpc_chttp2_hpack_compressor_destroy(&g_compressor);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc b/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc
index 942f25e..9a195da 100644
--- a/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc
+++ b/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc
@@ -29,9 +29,7 @@
 bool squelch = true;
 bool leak_check = true;
 
-static void onhdr(grpc_exec_ctx* exec_ctx, void* ud, grpc_mdelem md) {
-  GRPC_MDELEM_UNREF(exec_ctx, md);
-}
+static void onhdr(void* ud, grpc_mdelem md) { GRPC_MDELEM_UNREF(md); }
 static void dont_log(gpr_log_func_args* args) {}
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
@@ -39,13 +37,14 @@
   if (squelch) gpr_set_log_function(dont_log);
   grpc_init();
   grpc_chttp2_hpack_parser parser;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
-  parser.on_header = onhdr;
-  GRPC_ERROR_UNREF(grpc_chttp2_hpack_parser_parse(
-      &exec_ctx, &parser, grpc_slice_from_static_buffer(data, size)));
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
-  grpc_exec_ctx_finish(&exec_ctx);
+  {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_chttp2_hpack_parser_init(&parser);
+    parser.on_header = onhdr;
+    GRPC_ERROR_UNREF(grpc_chttp2_hpack_parser_parse(
+        &parser, grpc_slice_from_static_buffer(data, size)));
+    grpc_chttp2_hpack_parser_destroy(&parser);
+  }
   grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/chttp2/hpack_parser_test.cc b/test/core/transport/chttp2/hpack_parser_test.cc
index 82fb20a..9d3456a 100644
--- a/test/core/transport/chttp2/hpack_parser_test.cc
+++ b/test/core/transport/chttp2/hpack_parser_test.cc
@@ -32,7 +32,7 @@
   va_list args;
 } test_checker;
 
-static void onhdr(grpc_exec_ctx* exec_ctx, void* ud, grpc_mdelem md) {
+static void onhdr(void* ud, grpc_mdelem md) {
   const char *ekey, *evalue;
   test_checker* chk = static_cast<test_checker*>(ud);
   ekey = va_arg(chk->args, char*);
@@ -41,7 +41,7 @@
   GPR_ASSERT(evalue);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDKEY(md), ekey) == 0);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(md), evalue) == 0);
-  GRPC_MDELEM_UNREF(exec_ctx, md);
+  GRPC_MDELEM_UNREF(md);
 }
 
 static void test_vector(grpc_chttp2_hpack_parser* parser,
@@ -62,10 +62,9 @@
   grpc_slice_unref(input);
 
   for (i = 0; i < nslices; i++) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GPR_ASSERT(grpc_chttp2_hpack_parser_parse(&exec_ctx, parser, slices[i]) ==
+    grpc_core::ExecCtx exec_ctx;
+    GPR_ASSERT(grpc_chttp2_hpack_parser_parse(parser, slices[i]) ==
                GRPC_ERROR_NONE);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   for (i = 0; i < nslices; i++) {
@@ -80,9 +79,9 @@
 
 static void test_vectors(grpc_slice_split_mode mode) {
   grpc_chttp2_hpack_parser parser;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_init(&parser);
   /* D.2.1 */
   test_vector(&parser, mode,
               "400a 6375 7374 6f6d 2d6b 6579 0d63 7573"
@@ -98,9 +97,9 @@
               "password", "secret", NULL);
   /* D.2.4 */
   test_vector(&parser, mode, "82", ":method", "GET", NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_init(&parser);
   /* D.3.1 */
   test_vector(&parser, mode,
               "8286 8441 0f77 7777 2e65 7861 6d70 6c65"
@@ -118,9 +117,9 @@
               ":method", "GET", ":scheme", "https", ":path", "/index.html",
               ":authority", "www.example.com", "custom-key", "custom-value",
               NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_init(&parser);
   /* D.4.1 */
   test_vector(&parser, mode,
               "8286 8441 8cf1 e3c2 e5f2 3a6b a0ab 90f4"
@@ -138,11 +137,11 @@
               ":method", "GET", ":scheme", "https", ":path", "/index.html",
               ":authority", "www.example.com", "custom-key", "custom-value",
               NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
-  grpc_chttp2_hptbl_set_max_bytes(&exec_ctx, &parser.table, 256);
-  grpc_chttp2_hptbl_set_current_table_size(&exec_ctx, &parser.table, 256);
+  grpc_chttp2_hpack_parser_init(&parser);
+  grpc_chttp2_hptbl_set_max_bytes(&parser.table, 256);
+  grpc_chttp2_hptbl_set_current_table_size(&parser.table, 256);
   /* D.5.1 */
   test_vector(&parser, mode,
               "4803 3330 3258 0770 7269 7661 7465 611d"
@@ -172,11 +171,11 @@
               "https://www.example.com", "content-encoding", "gzip",
               "set-cookie",
               "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1", NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &parser);
-  grpc_chttp2_hptbl_set_max_bytes(&exec_ctx, &parser.table, 256);
-  grpc_chttp2_hptbl_set_current_table_size(&exec_ctx, &parser.table, 256);
+  grpc_chttp2_hpack_parser_init(&parser);
+  grpc_chttp2_hptbl_set_max_bytes(&parser.table, 256);
+  grpc_chttp2_hptbl_set_current_table_size(&parser.table, 256);
   /* D.6.1 */
   test_vector(&parser, mode,
               "4882 6402 5885 aec3 771a 4b61 96d0 7abe"
@@ -203,9 +202,7 @@
               "https://www.example.com", "content-encoding", "gzip",
               "set-cookie",
               "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1", NULL);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &parser);
-
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hpack_parser_destroy(&parser);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/transport/chttp2/hpack_table_test.cc b/test/core/transport/chttp2/hpack_table_test.cc
index ff7c2de..3f3cb2e 100644
--- a/test/core/transport/chttp2/hpack_table_test.cc
+++ b/test/core/transport/chttp2/hpack_table_test.cc
@@ -44,10 +44,10 @@
 }
 
 static void test_static_lookup(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hptbl tbl;
 
-  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
+  grpc_chttp2_hptbl_init(&tbl);
 
   LOG_TEST("test_static_lookup");
   assert_index(&tbl, 1, ":authority", "");
@@ -112,8 +112,7 @@
   assert_index(&tbl, 60, "via", "");
   assert_index(&tbl, 61, "www-authenticate", "");
 
-  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hptbl_destroy(&tbl);
 }
 
 static void test_many_additions(void) {
@@ -124,18 +123,17 @@
 
   LOG_TEST("test_many_additions");
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_chttp2_hptbl_init(&tbl);
 
   for (i = 0; i < 100000; i++) {
     grpc_mdelem elem;
     gpr_asprintf(&key, "K:%d", i);
     gpr_asprintf(&value, "VALUE:%d", i);
-    elem =
-        grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
-                                grpc_slice_from_copied_string(value));
-    GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-    GRPC_MDELEM_UNREF(&exec_ctx, elem);
+    elem = grpc_mdelem_from_slices(grpc_slice_from_copied_string(key),
+                                   grpc_slice_from_copied_string(value));
+    GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+    GRPC_MDELEM_UNREF(elem);
     assert_index(&tbl, 1 + GRPC_CHTTP2_LAST_STATIC_ENTRY, key, value);
     gpr_free(key);
     gpr_free(value);
@@ -148,25 +146,23 @@
     }
   }
 
-  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hptbl_destroy(&tbl);
 }
 
 static grpc_chttp2_hptbl_find_result find_simple(grpc_chttp2_hptbl* tbl,
                                                  const char* key,
                                                  const char* value) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_mdelem md =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_copied_string(key),
-                              grpc_slice_from_copied_string(value));
+  grpc_core::ExecCtx exec_ctx;
+  grpc_mdelem md = grpc_mdelem_from_slices(
+      grpc_slice_from_copied_string(key), grpc_slice_from_copied_string(value));
   grpc_chttp2_hptbl_find_result r = grpc_chttp2_hptbl_find(tbl, md);
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+
   return r;
 }
 
 static void test_find(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hptbl tbl;
   uint32_t i;
   char buffer[32];
@@ -175,21 +171,19 @@
 
   LOG_TEST("test_find");
 
-  grpc_chttp2_hptbl_init(&exec_ctx, &tbl);
-  elem =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("abc"),
-                              grpc_slice_from_static_string("xyz"));
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(&exec_ctx, elem);
-  elem =
-      grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("abc"),
-                              grpc_slice_from_static_string("123"));
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(&exec_ctx, elem);
-  elem = grpc_mdelem_from_slices(&exec_ctx, grpc_slice_from_static_string("x"),
+  grpc_chttp2_hptbl_init(&tbl);
+  elem = grpc_mdelem_from_slices(grpc_slice_from_static_string("abc"),
+                                 grpc_slice_from_static_string("xyz"));
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(elem);
+  elem = grpc_mdelem_from_slices(grpc_slice_from_static_string("abc"),
+                                 grpc_slice_from_static_string("123"));
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(elem);
+  elem = grpc_mdelem_from_slices(grpc_slice_from_static_string("x"),
                                  grpc_slice_from_static_string("1"));
-  GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-  GRPC_MDELEM_UNREF(&exec_ctx, elem);
+  GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+  GRPC_MDELEM_UNREF(elem);
 
   r = find_simple(&tbl, "abc", "123");
   GPR_ASSERT(r.index == 2 + GRPC_CHTTP2_LAST_STATIC_ENTRY);
@@ -238,11 +232,10 @@
   /* overflow the string buffer, check find still works */
   for (i = 0; i < 10000; i++) {
     int64_ttoa(i, buffer);
-    elem = grpc_mdelem_from_slices(&exec_ctx,
-                                   grpc_slice_from_static_string("test"),
+    elem = grpc_mdelem_from_slices(grpc_slice_from_static_string("test"),
                                    grpc_slice_from_copied_string(buffer));
-    GPR_ASSERT(grpc_chttp2_hptbl_add(&exec_ctx, &tbl, elem) == GRPC_ERROR_NONE);
-    GRPC_MDELEM_UNREF(&exec_ctx, elem);
+    GPR_ASSERT(grpc_chttp2_hptbl_add(&tbl, elem) == GRPC_ERROR_NONE);
+    GRPC_MDELEM_UNREF(elem);
   }
 
   r = find_simple(&tbl, "abc", "123");
@@ -270,8 +263,7 @@
   GPR_ASSERT(r.index != 0);
   GPR_ASSERT(r.has_value == 0);
 
-  grpc_chttp2_hptbl_destroy(&exec_ctx, &tbl);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hptbl_destroy(&tbl);
 }
 
 int main(int argc, char** argv) {
diff --git a/test/core/transport/chttp2/settings_timeout_test.cc b/test/core/transport/chttp2/settings_timeout_test.cc
new file mode 100644
index 0000000..08473c7
--- /dev/null
+++ b/test/core/transport/chttp2/settings_timeout_test.cc
@@ -0,0 +1,253 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+#include <memory>
+#include <thread>
+
+#include <gtest/gtest.h>
+
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/error.h"
+#include "src/core/lib/iomgr/pollset.h"
+#include "src/core/lib/iomgr/pollset_set.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/tcp_client.h"
+#include "src/core/lib/slice/slice_internal.h"
+
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+namespace grpc_core {
+namespace test {
+namespace {
+
+// A gRPC server, running in its own thread.
+class ServerThread {
+ public:
+  explicit ServerThread(const char* address) : address_(address) {}
+
+  void Start() {
+    // Start server with 1-second handshake timeout.
+    grpc_arg arg;
+    arg.type = GRPC_ARG_INTEGER;
+    arg.key = const_cast<char*>(GRPC_ARG_SERVER_HANDSHAKE_TIMEOUT_MS);
+    arg.value.integer = 1000;
+    grpc_channel_args args = {1, &arg};
+    server_ = grpc_server_create(&args, nullptr);
+    ASSERT_TRUE(grpc_server_add_insecure_http2_port(server_, address_));
+    cq_ = grpc_completion_queue_create_for_next(nullptr);
+    grpc_server_register_completion_queue(server_, cq_, nullptr);
+    grpc_server_start(server_);
+    thread_.reset(new std::thread(std::bind(&ServerThread::Serve, this)));
+  }
+
+  void Shutdown() {
+    grpc_completion_queue* shutdown_cq =
+        grpc_completion_queue_create_for_pluck(nullptr);
+    grpc_server_shutdown_and_notify(server_, shutdown_cq, nullptr);
+    GPR_ASSERT(grpc_completion_queue_pluck(shutdown_cq, nullptr,
+                                           grpc_timeout_seconds_to_deadline(1),
+                                           nullptr)
+                   .type == GRPC_OP_COMPLETE);
+    grpc_completion_queue_destroy(shutdown_cq);
+    grpc_server_destroy(server_);
+    grpc_completion_queue_destroy(cq_);
+    thread_->join();
+  }
+
+ private:
+  void Serve() {
+    // The completion queue should not return anything other than shutdown.
+    grpc_event ev = grpc_completion_queue_next(
+        cq_, gpr_inf_future(GPR_CLOCK_MONOTONIC), nullptr);
+    ASSERT_EQ(GRPC_QUEUE_SHUTDOWN, ev.type);
+  }
+
+  const char* address_;  // Do not own.
+  grpc_server* server_ = nullptr;
+  grpc_completion_queue* cq_ = nullptr;
+  std::unique_ptr<std::thread> thread_;
+};
+
+// A TCP client that connects to the server, reads data until the server
+// closes, and then terminates.
+class Client {
+ public:
+  explicit Client(const char* server_address)
+      : server_address_(server_address) {}
+
+  void Connect() {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_resolved_addresses* server_addresses = nullptr;
+    grpc_error* error =
+        grpc_blocking_resolve_address(server_address_, "80", &server_addresses);
+    ASSERT_EQ(GRPC_ERROR_NONE, error) << grpc_error_string(error);
+    ASSERT_GE(server_addresses->naddrs, 1UL);
+    pollset_ = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+    grpc_pollset_init(pollset_, &mu_);
+    grpc_pollset_set* pollset_set = grpc_pollset_set_create();
+    grpc_pollset_set_add_pollset(pollset_set, pollset_);
+    EventState state;
+    grpc_tcp_client_connect(state.closure(), &endpoint_, pollset_set,
+                            nullptr /* channel_args */, server_addresses->addrs,
+                            1000);
+    ASSERT_TRUE(PollUntilDone(
+        &state,
+        grpc_timespec_to_millis_round_up(gpr_inf_future(GPR_CLOCK_MONOTONIC))));
+    ASSERT_EQ(GRPC_ERROR_NONE, state.error());
+    grpc_pollset_set_destroy(pollset_set);
+    grpc_endpoint_add_to_pollset(endpoint_, pollset_);
+    grpc_resolved_addresses_destroy(server_addresses);
+  }
+
+  // Reads until an error is returned.
+  // Returns true if an error was encountered before the deadline.
+  bool ReadUntilError() {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_slice_buffer read_buffer;
+    grpc_slice_buffer_init(&read_buffer);
+    bool retval = true;
+    // Use a deadline of 3 seconds, which is a lot more than we should
+    // need for a 1-second timeout, but this helps avoid flakes.
+    grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 3000;
+    while (true) {
+      EventState state;
+      grpc_endpoint_read(endpoint_, &read_buffer, state.closure());
+      if (!PollUntilDone(&state, deadline)) {
+        retval = false;
+        break;
+      }
+      if (state.error() != GRPC_ERROR_NONE) break;
+      gpr_log(GPR_INFO, "client read %" PRIuPTR " bytes", read_buffer.length);
+      grpc_slice_buffer_reset_and_unref_internal(&read_buffer);
+    }
+    grpc_endpoint_shutdown(endpoint_,
+                           GRPC_ERROR_CREATE_FROM_STATIC_STRING("shutdown"));
+    grpc_slice_buffer_destroy_internal(&read_buffer);
+    return retval;
+  }
+
+  void Shutdown() {
+    grpc_core::ExecCtx exec_ctx;
+    grpc_endpoint_destroy(endpoint_);
+    grpc_pollset_shutdown(pollset_,
+                          GRPC_CLOSURE_CREATE(&Client::PollsetDestroy, pollset_,
+                                              grpc_schedule_on_exec_ctx));
+  }
+
+ private:
+  // State used to wait for an I/O event.
+  class EventState {
+   public:
+    EventState() {
+      GRPC_CLOSURE_INIT(&closure_, &EventState::OnEventDone, this,
+                        grpc_schedule_on_exec_ctx);
+    }
+
+    ~EventState() { GRPC_ERROR_UNREF(error_); }
+
+    grpc_closure* closure() { return &closure_; }
+
+    bool done() const { return done_; }
+
+    // Caller does NOT take ownership of the error.
+    grpc_error* error() const { return error_; }
+
+   private:
+    static void OnEventDone(void* arg, grpc_error* error) {
+      gpr_log(GPR_INFO, "OnEventDone(): %s", grpc_error_string(error));
+      EventState* state = (EventState*)arg;
+      state->error_ = GRPC_ERROR_REF(error);
+      state->done_ = true;
+    }
+
+    grpc_closure closure_;
+    bool done_ = false;
+    grpc_error* error_ = GRPC_ERROR_NONE;
+  };
+
+  // Returns true if done, or false if deadline exceeded.
+  bool PollUntilDone(EventState* state, grpc_millis deadline) {
+    while (true) {
+      grpc_pollset_worker* worker = nullptr;
+      gpr_mu_lock(mu_);
+      GRPC_LOG_IF_ERROR(
+          "grpc_pollset_work",
+          grpc_pollset_work(pollset_, &worker,
+                            grpc_core::ExecCtx::Get()->Now() + 1000));
+      gpr_mu_unlock(mu_);
+      if (state != nullptr && state->done()) return true;
+      if (grpc_core::ExecCtx::Get()->Now() >= deadline) return false;
+    }
+  }
+
+  static void PollsetDestroy(void* arg, grpc_error* error) {
+    grpc_pollset* pollset = (grpc_pollset*)arg;
+    grpc_pollset_destroy(pollset);
+    gpr_free(pollset);
+  }
+
+  const char* server_address_;  // Do not own.
+  grpc_endpoint* endpoint_;
+  gpr_mu* mu_;
+  grpc_pollset* pollset_;
+};
+
+TEST(SettingsTimeout, Basic) {
+  // Construct server address string.
+  const int server_port = grpc_pick_unused_port_or_die();
+  char* server_address_string;
+  gpr_asprintf(&server_address_string, "localhost:%d", server_port);
+  // Start server.
+  gpr_log(GPR_INFO, "starting server on %s", server_address_string);
+  ServerThread server_thread(server_address_string);
+  server_thread.Start();
+  // Create client and connect to server.
+  gpr_log(GPR_INFO, "starting client connect");
+  Client client(server_address_string);
+  client.Connect();
+  // Client read.  Should fail due to server dropping connection.
+  gpr_log(GPR_INFO, "starting client read");
+  EXPECT_TRUE(client.ReadUntilError());
+  // Shut down client.
+  gpr_log(GPR_INFO, "shutting down client");
+  client.Shutdown();
+  // Shut down server.
+  gpr_log(GPR_INFO, "shutting down server");
+  server_thread.Shutdown();
+  // Clean up.
+  gpr_free(server_address_string);
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace grpc_core
+
+int main(int argc, char** argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+  grpc_test_init(argc, argv);
+  grpc_init();
+  int result = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return result;
+}
diff --git a/test/core/transport/chttp2/varint_test.cc b/test/core/transport/chttp2/varint_test.cc
index 413b461..36760d0 100644
--- a/test/core/transport/chttp2/varint_test.cc
+++ b/test/core/transport/chttp2/varint_test.cc
@@ -18,6 +18,7 @@
 
 #include "src/core/ext/transport/chttp2/transport/varint.h"
 
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <grpc/support/log.h>
 
@@ -44,11 +45,13 @@
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   TEST_VARINT(0, 1, 0, "\x00");
   TEST_VARINT(128, 1, 0, "\x7f\x01");
   TEST_VARINT(16384, 1, 0, "\x7f\x81\x7f");
   TEST_VARINT(2097152, 1, 0, "\x7f\x81\xff\x7f");
   TEST_VARINT(268435456, 1, 0, "\x7f\x81\xff\xff\x7f");
   TEST_VARINT(0xffffffff, 1, 0, "\x7f\x80\xff\xff\xff\x0f");
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/connectivity_state_test.cc b/test/core/transport/connectivity_state_test.cc
index 11046e1..f589459 100644
--- a/test/core/transport/connectivity_state_test.cc
+++ b/test/core/transport/connectivity_state_test.cc
@@ -29,14 +29,13 @@
 
 int g_counter;
 
-static void must_succeed(grpc_exec_ctx* exec_ctx, void* arg,
-                         grpc_error* error) {
+static void must_succeed(void* arg, grpc_error* error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(arg == THE_ARG);
   g_counter++;
 }
 
-static void must_fail(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+static void must_fail(void* arg, grpc_error* error) {
   GPR_ASSERT(error != GRPC_ERROR_NONE);
   GPR_ASSERT(arg == THE_ARG);
   g_counter++;
@@ -59,7 +58,7 @@
 
 static void test_check(void) {
   grpc_connectivity_state_tracker tracker;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_error* error;
   gpr_log(GPR_DEBUG, "test_check");
   grpc_connectivity_state_init(&tracker, GRPC_CHANNEL_IDLE, "xxx");
@@ -67,8 +66,7 @@
              GRPC_CHANNEL_IDLE);
   GPR_ASSERT(grpc_connectivity_state_check(&tracker) == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  grpc_connectivity_state_destroy(&exec_ctx, &tracker);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_connectivity_state_destroy(&tracker);
 }
 
 static void test_subscribe_then_unsubscribe(void) {
@@ -76,23 +74,21 @@
   grpc_closure* closure =
       GRPC_CLOSURE_CREATE(must_fail, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "test_subscribe_then_unsubscribe");
   g_counter = 0;
   grpc_connectivity_state_init(&tracker, GRPC_CHANNEL_IDLE, "xxx");
-  GPR_ASSERT(grpc_connectivity_state_notify_on_state_change(&exec_ctx, &tracker,
-                                                            &state, closure));
-  grpc_exec_ctx_flush(&exec_ctx);
+  GPR_ASSERT(grpc_connectivity_state_notify_on_state_change(&tracker, &state,
+                                                            closure));
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(g_counter == 0);
-  grpc_connectivity_state_notify_on_state_change(&exec_ctx, &tracker, nullptr,
-                                                 closure);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_connectivity_state_notify_on_state_change(&tracker, nullptr, closure);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(g_counter == 1);
 
-  grpc_connectivity_state_destroy(&exec_ctx, &tracker);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_connectivity_state_destroy(&tracker);
 }
 
 static void test_subscribe_then_destroy(void) {
@@ -100,17 +96,18 @@
   grpc_closure* closure =
       GRPC_CLOSURE_CREATE(must_succeed, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "test_subscribe_then_destroy");
   g_counter = 0;
   grpc_connectivity_state_init(&tracker, GRPC_CHANNEL_IDLE, "xxx");
-  GPR_ASSERT(grpc_connectivity_state_notify_on_state_change(&exec_ctx, &tracker,
-                                                            &state, closure));
-  grpc_exec_ctx_flush(&exec_ctx);
+  GPR_ASSERT(grpc_connectivity_state_notify_on_state_change(&tracker, &state,
+                                                            closure));
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(g_counter == 0);
-  grpc_connectivity_state_destroy(&exec_ctx, &tracker);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_connectivity_state_destroy(&tracker);
+
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_SHUTDOWN);
   GPR_ASSERT(g_counter == 1);
 }
@@ -120,28 +117,30 @@
   grpc_closure* closure =
       GRPC_CLOSURE_CREATE(must_fail, THE_ARG, grpc_schedule_on_exec_ctx);
   grpc_connectivity_state state = GRPC_CHANNEL_SHUTDOWN;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "test_subscribe_with_failure_then_destroy");
   g_counter = 0;
   grpc_connectivity_state_init(&tracker, GRPC_CHANNEL_SHUTDOWN, "xxx");
   GPR_ASSERT(0 == grpc_connectivity_state_notify_on_state_change(
-                      &exec_ctx, &tracker, &state, closure));
-  grpc_exec_ctx_flush(&exec_ctx);
+                      &tracker, &state, closure));
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_SHUTDOWN);
   GPR_ASSERT(g_counter == 0);
-  grpc_connectivity_state_destroy(&exec_ctx, &tracker);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_connectivity_state_destroy(&tracker);
+  grpc_core::ExecCtx::Get()->Flush();
   GPR_ASSERT(state == GRPC_CHANNEL_SHUTDOWN);
   GPR_ASSERT(g_counter == 1);
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   grpc_core::testing::grpc_tracer_enable_flag(&grpc_connectivity_state_trace);
   test_connectivity_state_name();
   test_check();
   test_subscribe_then_unsubscribe();
   test_subscribe_then_destroy();
   test_subscribe_with_failure_then_destroy();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/metadata_test.cc b/test/core/transport/metadata_test.cc
index b60a961..5c52ae8 100644
--- a/test/core/transport/metadata_test.cc
+++ b/test/core/transport/metadata_test.cc
@@ -60,15 +60,15 @@
           intern_keys, intern_values);
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   m1 = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   m2 = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   m3 = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("c"), intern_values));
   GPR_ASSERT(grpc_mdelem_eq(m1, m2));
   GPR_ASSERT(!grpc_mdelem_eq(m3, m1));
@@ -77,10 +77,10 @@
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDKEY(m1), "a") == 0);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(m1), "b") == 0);
   GPR_ASSERT(grpc_slice_str_cmp(GRPC_MDVALUE(m3), "c") == 0);
-  GRPC_MDELEM_UNREF(&exec_ctx, m1);
-  GRPC_MDELEM_UNREF(&exec_ctx, m2);
-  GRPC_MDELEM_UNREF(&exec_ctx, m3);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(m1);
+  GRPC_MDELEM_UNREF(m2);
+  GRPC_MDELEM_UNREF(m3);
+
   grpc_shutdown();
 }
 
@@ -95,19 +95,15 @@
       intern_keys, intern_values);
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   /* add, and immediately delete a bunch of different elements */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
-    GRPC_MDELEM_UNREF(
-        &exec_ctx,
-        grpc_mdelem_from_slices(
-            &exec_ctx,
-            maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
-            maybe_intern(grpc_slice_from_copied_string(buffer),
-                         intern_values)));
+    GRPC_MDELEM_UNREF(grpc_mdelem_from_slices(
+        maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+        maybe_intern(grpc_slice_from_copied_string(buffer), intern_values)));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_shutdown();
 }
 
@@ -121,28 +117,28 @@
   gpr_log(GPR_INFO, "test_create_many_persistant_metadata");
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   /* add phase */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
     created[i] = grpc_mdelem_from_slices(
-        &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("a")),
+        grpc_slice_intern(grpc_slice_from_static_string("a")),
         grpc_slice_intern(grpc_slice_from_static_string(buffer)));
   }
   /* verify phase */
   for (i = 0; i < MANY; i++) {
     gpr_ltoa(i, buffer);
     md = grpc_mdelem_from_slices(
-        &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("a")),
+        grpc_slice_intern(grpc_slice_from_static_string("a")),
         grpc_slice_intern(grpc_slice_from_static_string(buffer)));
     GPR_ASSERT(grpc_mdelem_eq(md, created[i]));
-    GRPC_MDELEM_UNREF(&exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   }
   /* cleanup phase */
   for (i = 0; i < MANY; i++) {
-    GRPC_MDELEM_UNREF(&exec_ctx, created[i]);
+    GRPC_MDELEM_UNREF(created[i]);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_shutdown();
 
   gpr_free(created);
@@ -155,31 +151,25 @@
           intern_keys, intern_values);
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem a, b, c;
   GRPC_MDELEM_UNREF(
-      &exec_ctx,
       a = grpc_mdelem_from_slices(
-          &exec_ctx,
           maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
           maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
   GRPC_MDELEM_UNREF(
-      &exec_ctx,
       b = grpc_mdelem_from_slices(
-          &exec_ctx,
           maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
           maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
   GRPC_MDELEM_UNREF(
-      &exec_ctx,
       c = grpc_mdelem_from_slices(
-          &exec_ctx,
           maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
           maybe_intern(grpc_slice_from_static_string("b"), intern_values)));
   if (intern_keys && intern_values) {
     GPR_ASSERT(a.payload == b.payload);
     GPR_ASSERT(a.payload == c.payload);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_shutdown();
 }
 
@@ -188,16 +178,16 @@
           intern_keys, intern_values);
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem a, b, c;
   a = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   b = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   c = grpc_mdelem_from_slices(
-      &exec_ctx, maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
+      maybe_intern(grpc_slice_from_static_string("a"), intern_keys),
       maybe_intern(grpc_slice_from_static_string("b"), intern_values));
   GPR_ASSERT(grpc_mdelem_eq(a, a));
   GPR_ASSERT(grpc_mdelem_eq(b, b));
@@ -216,10 +206,10 @@
     GPR_ASSERT(a.payload != c.payload);
     GPR_ASSERT(b.payload != c.payload);
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, a);
-  GRPC_MDELEM_UNREF(&exec_ctx, b);
-  GRPC_MDELEM_UNREF(&exec_ctx, c);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(a);
+  GRPC_MDELEM_UNREF(b);
+  GRPC_MDELEM_UNREF(c);
+
   grpc_shutdown();
 }
 
@@ -235,7 +225,7 @@
   gpr_log(GPR_INFO, "test_things_stick_around");
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   for (i = 0; i < nstrs; i++) {
     gpr_asprintf(&buffer, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%" PRIuPTR "x", i);
@@ -246,7 +236,7 @@
 
   for (i = 0; i < nstrs; i++) {
     grpc_slice_ref_internal(strs[i]);
-    grpc_slice_unref_internal(&exec_ctx, strs[i]);
+    grpc_slice_unref_internal(strs[i]);
   }
 
   for (i = 0; i < nstrs; i++) {
@@ -258,18 +248,17 @@
   }
 
   for (i = 0; i < nstrs; i++) {
-    grpc_slice_unref_internal(&exec_ctx, strs[shuf[i]]);
+    grpc_slice_unref_internal(strs[shuf[i]]);
     for (j = i + 1; j < nstrs; j++) {
       gpr_asprintf(&buffer, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%" PRIuPTR "x",
                    shuf[j]);
       test = grpc_slice_intern(grpc_slice_from_static_string(buffer));
       GPR_ASSERT(grpc_slice_is_equivalent(test, strs[shuf[j]]));
-      grpc_slice_unref_internal(&exec_ctx, test);
+      grpc_slice_unref_internal(test);
       gpr_free(buffer);
     }
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   gpr_free(strs);
   gpr_free(shuf);
@@ -282,39 +271,38 @@
   gpr_log(GPR_INFO, "test_user_data_works");
 
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   ud1 = static_cast<int*>(gpr_malloc(sizeof(int)));
   *ud1 = 1;
   ud2 = static_cast<int*>(gpr_malloc(sizeof(int)));
   *ud2 = 2;
   md = grpc_mdelem_from_slices(
-      &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc")),
+      grpc_slice_intern(grpc_slice_from_static_string("abc")),
       grpc_slice_intern(grpc_slice_from_static_string("123")));
   grpc_mdelem_set_user_data(md, gpr_free, ud1);
   grpc_mdelem_set_user_data(md, gpr_free, ud2);
   GPR_ASSERT(grpc_mdelem_get_user_data(md, gpr_free) == ud1);
-  GRPC_MDELEM_UNREF(&exec_ctx, md);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(md);
+
   grpc_shutdown();
 }
 
-static void verify_ascii_header_size(grpc_exec_ctx* exec_ctx, const char* key,
-                                     const char* value, bool intern_key,
-                                     bool intern_value) {
+static void verify_ascii_header_size(const char* key, const char* value,
+                                     bool intern_key, bool intern_value) {
   grpc_mdelem elem = grpc_mdelem_from_slices(
-      exec_ctx, maybe_intern(grpc_slice_from_static_string(key), intern_key),
+      maybe_intern(grpc_slice_from_static_string(key), intern_key),
       maybe_intern(grpc_slice_from_static_string(value), intern_value));
   size_t elem_size = grpc_mdelem_get_size_in_hpack_table(elem, false);
   size_t expected_size = 32 + strlen(key) + strlen(value);
   GPR_ASSERT(expected_size == elem_size);
-  GRPC_MDELEM_UNREF(exec_ctx, elem);
+  GRPC_MDELEM_UNREF(elem);
 }
 
-static void verify_binary_header_size(grpc_exec_ctx* exec_ctx, const char* key,
-                                      const uint8_t* value, size_t value_len,
-                                      bool intern_key, bool intern_value) {
+static void verify_binary_header_size(const char* key, const uint8_t* value,
+                                      size_t value_len, bool intern_key,
+                                      bool intern_value) {
   grpc_mdelem elem = grpc_mdelem_from_slices(
-      exec_ctx, maybe_intern(grpc_slice_from_static_string(key), intern_key),
+      maybe_intern(grpc_slice_from_static_string(key), intern_key),
       maybe_intern(grpc_slice_from_static_buffer(value, value_len),
                    intern_value));
   GPR_ASSERT(grpc_is_binary_header(GRPC_MDKEY(elem)));
@@ -324,9 +312,9 @@
   grpc_slice base64_encoded = grpc_chttp2_base64_encode(value_slice);
   size_t expected_size = 32 + strlen(key) + GRPC_SLICE_LENGTH(base64_encoded);
   GPR_ASSERT(expected_size == elem_size);
-  grpc_slice_unref_internal(exec_ctx, value_slice);
-  grpc_slice_unref_internal(exec_ctx, base64_encoded);
-  GRPC_MDELEM_UNREF(exec_ctx, elem);
+  grpc_slice_unref_internal(value_slice);
+  grpc_slice_unref_internal(base64_encoded);
+  GRPC_MDELEM_UNREF(elem);
 }
 
 #define BUFFER_SIZE 64
@@ -334,27 +322,23 @@
   gpr_log(GPR_INFO, "test_mdelem_size: intern_key=%d intern_value=%d",
           intern_key, intern_value);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   uint8_t binary_value[BUFFER_SIZE] = {0};
   for (uint8_t i = 0; i < BUFFER_SIZE; i++) {
     binary_value[i] = i;
   }
 
-  verify_ascii_header_size(&exec_ctx, "hello", "world", intern_key,
-                           intern_value);
-  verify_ascii_header_size(&exec_ctx, "hello",
-                           "worldxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", intern_key,
-                           intern_value);
-  verify_ascii_header_size(&exec_ctx, ":scheme", "http", intern_key,
-                           intern_value);
+  verify_ascii_header_size("hello", "world", intern_key, intern_value);
+  verify_ascii_header_size("hello", "worldxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
+                           intern_key, intern_value);
+  verify_ascii_header_size(":scheme", "http", intern_key, intern_value);
 
   for (uint8_t i = 0; i < BUFFER_SIZE; i++) {
-    verify_binary_header_size(&exec_ctx, "hello-bin", binary_value, i,
-                              intern_key, intern_value);
+    verify_binary_header_size("hello-bin", binary_value, i, intern_key,
+                              intern_value);
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
@@ -362,13 +346,13 @@
   gpr_log(GPR_INFO, "test_static_metadata: dup_key=%d dup_value=%d", dup_key,
           dup_value);
   grpc_init();
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   for (size_t i = 0; i < GRPC_STATIC_MDELEM_COUNT; i++) {
     grpc_mdelem p = GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[i],
                                      GRPC_MDELEM_STORAGE_STATIC);
     grpc_mdelem q =
-        grpc_mdelem_from_slices(&exec_ctx, maybe_dup(GRPC_MDKEY(p), dup_key),
+        grpc_mdelem_from_slices(maybe_dup(GRPC_MDKEY(p), dup_key),
                                 maybe_dup(GRPC_MDVALUE(p), dup_value));
     GPR_ASSERT(grpc_mdelem_eq(p, q));
     if (dup_key || dup_value) {
@@ -376,16 +360,16 @@
     } else {
       GPR_ASSERT(p.payload == q.payload);
     }
-    GRPC_MDELEM_UNREF(&exec_ctx, p);
-    GRPC_MDELEM_UNREF(&exec_ctx, q);
+    GRPC_MDELEM_UNREF(p);
+    GRPC_MDELEM_UNREF(q);
   }
 
-  grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
 }
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
   test_no_op();
   for (int k = 0; k <= 1; k++) {
     for (int v = 0; v <= 1; v++) {
@@ -400,5 +384,6 @@
   test_create_many_persistant_metadata();
   test_things_stick_around();
   test_user_data_works();
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/transport/status_conversion_test.cc b/test/core/transport/status_conversion_test.cc
index 7af5d12..1ed6ccf 100644
--- a/test/core/transport/status_conversion_test.cc
+++ b/test/core/transport/status_conversion_test.cc
@@ -22,12 +22,11 @@
 
 #define GRPC_STATUS_TO_HTTP2_ERROR(a, b) \
   GPR_ASSERT(grpc_status_to_http2_error(a) == (b))
-#define HTTP2_ERROR_TO_GRPC_STATUS(a, deadline, b)                           \
-  do {                                                                       \
-    grpc_exec_ctx my_exec_ctx = GRPC_EXEC_CTX_INIT;                          \
-    GPR_ASSERT(grpc_http2_error_to_grpc_status(&my_exec_ctx, a, deadline) == \
-               (b));                                                         \
-    grpc_exec_ctx_finish(&my_exec_ctx);                                      \
+#define HTTP2_ERROR_TO_GRPC_STATUS(a, deadline, b)                   \
+  do {                                                               \
+    grpc_core::ExecCtx exec_ctx;                                     \
+    GPR_ASSERT(grpc_http2_error_to_grpc_status(a, deadline) == (b)); \
+                                                                     \
   } while (0)
 #define GRPC_STATUS_TO_HTTP2_STATUS(a, b) \
   GPR_ASSERT(grpc_status_to_http2_status(a) == (b))
diff --git a/test/core/transport/stream_owned_slice_test.cc b/test/core/transport/stream_owned_slice_test.cc
index e82df21..7831f67 100644
--- a/test/core/transport/stream_owned_slice_test.cc
+++ b/test/core/transport/stream_owned_slice_test.cc
@@ -20,12 +20,14 @@
 
 #include "test/core/util/test_config.h"
 
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void do_nothing(void* arg, grpc_error* error) {}
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  grpc_init();
 
   uint8_t buffer[] = "abc123";
   grpc_stream_refcount r;
@@ -39,5 +41,6 @@
   grpc_slice_unref(slice);
   GPR_ASSERT(r.refs.count == 1);
 
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/util/mock_endpoint.cc b/test/core/util/mock_endpoint.cc
index d9545ef..4b35a58 100644
--- a/test/core/util/mock_endpoint.cc
+++ b/test/core/util/mock_endpoint.cc
@@ -40,13 +40,13 @@
   grpc_resource_user* resource_user;
 } grpc_mock_endpoint;
 
-static void me_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                    grpc_slice_buffer* slices, grpc_closure* cb) {
+static void me_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                    grpc_closure* cb) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   gpr_mu_lock(&m->mu);
   if (m->read_buffer.count > 0) {
     grpc_slice_buffer_swap(&m->read_buffer, slices);
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
   } else {
     m->on_read = cb;
     m->on_read_out = slices;
@@ -54,44 +54,41 @@
   gpr_mu_unlock(&m->mu);
 }
 
-static void me_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* slices, grpc_closure* cb) {
+static void me_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                     grpc_closure* cb) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   for (size_t i = 0; i < slices->count; i++) {
     m->on_write(slices->slices[i]);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
 }
 
-static void me_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                              grpc_pollset* pollset) {}
+static void me_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {}
 
-static void me_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void me_add_to_pollset_set(grpc_endpoint* ep,
                                   grpc_pollset_set* pollset) {}
 
-static void me_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_endpoint* ep,
+static void me_delete_from_pollset_set(grpc_endpoint* ep,
                                        grpc_pollset_set* pollset) {}
 
-static void me_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_error* why) {
+static void me_shutdown(grpc_endpoint* ep, grpc_error* why) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   gpr_mu_lock(&m->mu);
   if (m->on_read) {
-    GRPC_CLOSURE_SCHED(exec_ctx, m->on_read,
+    GRPC_CLOSURE_SCHED(m->on_read,
                        GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
                            "Endpoint Shutdown", &why, 1));
     m->on_read = nullptr;
   }
   gpr_mu_unlock(&m->mu);
-  grpc_resource_user_shutdown(exec_ctx, m->resource_user);
+  grpc_resource_user_shutdown(m->resource_user);
   GRPC_ERROR_UNREF(why);
 }
 
-static void me_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void me_destroy(grpc_endpoint* ep) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   grpc_slice_buffer_destroy(&m->read_buffer);
-  grpc_resource_user_unref(exec_ctx, m->resource_user);
+  grpc_resource_user_unref(m->resource_user);
   gpr_free(m);
 }
 
@@ -134,13 +131,12 @@
   return &m->base;
 }
 
-void grpc_mock_endpoint_put_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                 grpc_slice slice) {
+void grpc_mock_endpoint_put_read(grpc_endpoint* ep, grpc_slice slice) {
   grpc_mock_endpoint* m = (grpc_mock_endpoint*)ep;
   gpr_mu_lock(&m->mu);
   if (m->on_read != nullptr) {
     grpc_slice_buffer_add(m->on_read_out, slice);
-    GRPC_CLOSURE_SCHED(exec_ctx, m->on_read, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(m->on_read, GRPC_ERROR_NONE);
     m->on_read = nullptr;
   } else {
     grpc_slice_buffer_add(&m->read_buffer, slice);
diff --git a/test/core/util/mock_endpoint.h b/test/core/util/mock_endpoint.h
index ccabaf7..6521d3e 100644
--- a/test/core/util/mock_endpoint.h
+++ b/test/core/util/mock_endpoint.h
@@ -23,8 +23,7 @@
 
 grpc_endpoint* grpc_mock_endpoint_create(void (*on_write)(grpc_slice slice),
                                          grpc_resource_quota* resource_quota);
-void grpc_mock_endpoint_put_read(grpc_exec_ctx* exec_ctx,
-                                 grpc_endpoint* mock_endpoint,
+void grpc_mock_endpoint_put_read(grpc_endpoint* mock_endpoint,
                                  grpc_slice slice);
 
 #endif
diff --git a/test/core/util/one_corpus_entry_fuzzer.cc b/test/core/util/one_corpus_entry_fuzzer.cc
index c0b67da..c745eb5 100644
--- a/test/core/util/one_corpus_entry_fuzzer.cc
+++ b/test/core/util/one_corpus_entry_fuzzer.cc
@@ -18,7 +18,10 @@
 
 #include <stdbool.h>
 
+#include <grpc/grpc.h>
+
 #include <grpc/support/log.h>
+#include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/iomgr/load_file.h"
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
@@ -30,10 +33,15 @@
   grpc_slice buffer;
   squelch = false;
   leak_check = false;
+  /* TODO(yashkt) Calling grpc_init breaks tests. Fix the tests and replace
+   * grpc_core::ExecCtx::GlobalInit with grpc_init and GlobalShutdown with
+   * grpc_shutdown */
   GPR_ASSERT(
       GRPC_LOG_IF_ERROR("load_file", grpc_load_file(argv[1], 0, &buffer)));
   LLVMFuzzerTestOneInput(GRPC_SLICE_START_PTR(buffer),
                          GRPC_SLICE_LENGTH(buffer));
+  grpc_core::ExecCtx::GlobalInit();
   grpc_slice_unref(buffer);
+  grpc_core::ExecCtx::GlobalShutdown();
   return 0;
 }
diff --git a/test/core/util/passthru_endpoint.cc b/test/core/util/passthru_endpoint.cc
index a9efe22..5f127cb 100644
--- a/test/core/util/passthru_endpoint.cc
+++ b/test/core/util/passthru_endpoint.cc
@@ -49,22 +49,22 @@
   int halves;
   grpc_passthru_endpoint_stats* stats;
   grpc_passthru_endpoint_stats
-      dummy_stats;  // used if constructor stats == NULL
+      dummy_stats;  // used if constructor stats == nullptr
   bool shutdown;
   half client;
   half server;
 };
 
-static void me_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                    grpc_slice_buffer* slices, grpc_closure* cb) {
+static void me_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                    grpc_closure* cb) {
   half* m = (half*)ep;
   gpr_mu_lock(&m->parent->mu);
   if (m->parent->shutdown) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, cb, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Already shutdown"));
+        cb, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Already shutdown"));
   } else if (m->read_buffer.count > 0) {
     grpc_slice_buffer_swap(&m->read_buffer, slices);
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
   } else {
     m->on_read = cb;
     m->on_read_out = slices;
@@ -77,8 +77,8 @@
   return &h->parent->client;
 }
 
-static void me_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* slices, grpc_closure* cb) {
+static void me_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                     grpc_closure* cb) {
   half* m = other_half((half*)ep);
   gpr_mu_lock(&m->parent->mu);
   grpc_error* error = GRPC_ERROR_NONE;
@@ -89,7 +89,7 @@
     for (size_t i = 0; i < slices->count; i++) {
       grpc_slice_buffer_add(m->on_read_out, grpc_slice_copy(slices->slices[i]));
     }
-    GRPC_CLOSURE_SCHED(exec_ctx, m->on_read, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(m->on_read, GRPC_ERROR_NONE);
     m->on_read = nullptr;
   } else {
     for (size_t i = 0; i < slices->count; i++) {
@@ -98,52 +98,49 @@
     }
   }
   gpr_mu_unlock(&m->parent->mu);
-  GRPC_CLOSURE_SCHED(exec_ctx, cb, error);
+  GRPC_CLOSURE_SCHED(cb, error);
 }
 
-static void me_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                              grpc_pollset* pollset) {}
+static void me_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {}
 
-static void me_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void me_add_to_pollset_set(grpc_endpoint* ep,
                                   grpc_pollset_set* pollset) {}
 
-static void me_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_endpoint* ep,
+static void me_delete_from_pollset_set(grpc_endpoint* ep,
                                        grpc_pollset_set* pollset) {}
 
-static void me_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_error* why) {
+static void me_shutdown(grpc_endpoint* ep, grpc_error* why) {
   half* m = (half*)ep;
   gpr_mu_lock(&m->parent->mu);
   m->parent->shutdown = true;
   if (m->on_read) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, m->on_read,
+        m->on_read,
         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING("Shutdown", &why, 1));
     m->on_read = nullptr;
   }
   m = other_half(m);
   if (m->on_read) {
     GRPC_CLOSURE_SCHED(
-        exec_ctx, m->on_read,
+        m->on_read,
         GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING("Shutdown", &why, 1));
     m->on_read = nullptr;
   }
   gpr_mu_unlock(&m->parent->mu);
-  grpc_resource_user_shutdown(exec_ctx, m->resource_user);
+  grpc_resource_user_shutdown(m->resource_user);
   GRPC_ERROR_UNREF(why);
 }
 
-static void me_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void me_destroy(grpc_endpoint* ep) {
   passthru_endpoint* p = ((half*)ep)->parent;
   gpr_mu_lock(&p->mu);
   if (0 == --p->halves) {
     gpr_mu_unlock(&p->mu);
     gpr_mu_destroy(&p->mu);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &p->client.read_buffer);
-    grpc_slice_buffer_destroy_internal(exec_ctx, &p->server.read_buffer);
-    grpc_resource_user_unref(exec_ctx, p->client.resource_user);
-    grpc_resource_user_unref(exec_ctx, p->server.resource_user);
+    grpc_slice_buffer_destroy_internal(&p->client.read_buffer);
+    grpc_slice_buffer_destroy_internal(&p->server.read_buffer);
+    grpc_resource_user_unref(p->client.resource_user);
+    grpc_resource_user_unref(p->server.resource_user);
     gpr_free(p);
   } else {
     gpr_mu_unlock(&p->mu);
diff --git a/test/core/util/port_server_client.cc b/test/core/util/port_server_client.cc
index edec50b..7e76c80 100644
--- a/test/core/util/port_server_client.cc
+++ b/test/core/util/port_server_client.cc
@@ -40,22 +40,19 @@
   int done;
 } freereq;
 
-static void destroy_pops_and_shutdown(grpc_exec_ctx* exec_ctx, void* p,
-                                      grpc_error* error) {
+static void destroy_pops_and_shutdown(void* p, grpc_error* error) {
   grpc_pollset* pollset = grpc_polling_entity_pollset((grpc_polling_entity*)p);
-  grpc_pollset_destroy(exec_ctx, pollset);
+  grpc_pollset_destroy(pollset);
   gpr_free(pollset);
 }
 
-static void freed_port_from_server(grpc_exec_ctx* exec_ctx, void* arg,
-                                   grpc_error* error) {
+static void freed_port_from_server(void* arg, grpc_error* error) {
   freereq* pr = (freereq*)arg;
   gpr_mu_lock(pr->mu);
   pr->done = 1;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
-                        nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&pr->pops), nullptr));
   gpr_mu_unlock(pr->mu);
 }
 
@@ -65,7 +62,7 @@
   grpc_httpcli_response rsp;
   freereq pr;
   char* path;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure* shutdown_closure;
 
   grpc_init();
@@ -87,30 +84,30 @@
   grpc_httpcli_context_init(&context);
   grpc_resource_quota* resource_quota =
       grpc_resource_quota_create("port_server_client/free");
-  grpc_httpcli_get(&exec_ctx, &context, &pr.pops, resource_quota, &req,
-                   grpc_exec_ctx_now(&exec_ctx) + 30 * GPR_MS_PER_SEC,
+  grpc_httpcli_get(&context, &pr.pops, resource_quota, &req,
+                   grpc_core::ExecCtx::Get()->Now() + 30 * GPR_MS_PER_SEC,
                    GRPC_CLOSURE_CREATE(freed_port_from_server, &pr,
                                        grpc_schedule_on_exec_ctx),
                    &rsp);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_resource_quota_unref_internal(resource_quota);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(pr.mu);
   while (!pr.done) {
     grpc_pollset_worker* worker = nullptr;
     if (!GRPC_LOG_IF_ERROR(
             "pollset_work",
-            grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
-                              &worker,
-                              grpc_exec_ctx_now(&exec_ctx) + GPR_MS_PER_SEC))) {
+            grpc_pollset_work(
+                grpc_polling_entity_pollset(&pr.pops), &worker,
+                grpc_core::ExecCtx::Get()->Now() + GPR_MS_PER_SEC))) {
       pr.done = 1;
     }
   }
   gpr_mu_unlock(pr.mu);
 
-  grpc_httpcli_context_destroy(&exec_ctx, &context);
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
+  grpc_httpcli_context_destroy(&context);
+  grpc_pollset_shutdown(grpc_polling_entity_pollset(&pr.pops),
                         shutdown_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+
   gpr_free(path);
   grpc_http_response_destroy(&rsp);
 
@@ -127,8 +124,7 @@
   grpc_httpcli_response response;
 } portreq;
 
-static void got_port_from_server(grpc_exec_ctx* exec_ctx, void* arg,
-                                 grpc_error* error) {
+static void got_port_from_server(void* arg, grpc_error* error) {
   size_t i;
   int port = 0;
   portreq* pr = (portreq*)arg;
@@ -154,8 +150,7 @@
       pr->port = 0;
       GRPC_LOG_IF_ERROR(
           "pollset_kick",
-          grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
-                            nullptr));
+          grpc_pollset_kick(grpc_polling_entity_pollset(&pr->pops), nullptr));
       gpr_mu_unlock(pr->mu);
       return;
     }
@@ -172,12 +167,12 @@
     memset(&pr->response, 0, sizeof(pr->response));
     grpc_resource_quota* resource_quota =
         grpc_resource_quota_create("port_server_client/pick_retry");
-    grpc_httpcli_get(exec_ctx, pr->ctx, &pr->pops, resource_quota, &req,
-                     grpc_exec_ctx_now(exec_ctx) + 30 * GPR_MS_PER_SEC,
+    grpc_httpcli_get(pr->ctx, &pr->pops, resource_quota, &req,
+                     grpc_core::ExecCtx::Get()->Now() + 30 * GPR_MS_PER_SEC,
                      GRPC_CLOSURE_CREATE(got_port_from_server, pr,
                                          grpc_schedule_on_exec_ctx),
                      &pr->response);
-    grpc_resource_quota_unref_internal(exec_ctx, resource_quota);
+    grpc_resource_quota_unref_internal(resource_quota);
     return;
   }
   GPR_ASSERT(response);
@@ -191,8 +186,7 @@
   pr->port = port;
   GRPC_LOG_IF_ERROR(
       "pollset_kick",
-      grpc_pollset_kick(exec_ctx, grpc_polling_entity_pollset(&pr->pops),
-                        nullptr));
+      grpc_pollset_kick(grpc_polling_entity_pollset(&pr->pops), nullptr));
   gpr_mu_unlock(pr->mu);
 }
 
@@ -200,53 +194,55 @@
   grpc_httpcli_context context;
   grpc_httpcli_request req;
   portreq pr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_closure* shutdown_closure;
 
   grpc_init();
+  {
+    grpc_core::ExecCtx exec_ctx;
+    memset(&pr, 0, sizeof(pr));
+    memset(&req, 0, sizeof(req));
+    grpc_pollset* pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+    grpc_pollset_init(pollset, &pr.mu);
+    pr.pops = grpc_polling_entity_create_from_pollset(pollset);
+    shutdown_closure = GRPC_CLOSURE_CREATE(destroy_pops_and_shutdown, &pr.pops,
+                                           grpc_schedule_on_exec_ctx);
+    pr.port = -1;
+    pr.server = const_cast<char*>(GRPC_PORT_SERVER_ADDRESS);
+    pr.ctx = &context;
 
-  memset(&pr, 0, sizeof(pr));
-  memset(&req, 0, sizeof(req));
-  grpc_pollset* pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
-  grpc_pollset_init(pollset, &pr.mu);
-  pr.pops = grpc_polling_entity_create_from_pollset(pollset);
-  shutdown_closure = GRPC_CLOSURE_CREATE(destroy_pops_and_shutdown, &pr.pops,
-                                         grpc_schedule_on_exec_ctx);
-  pr.port = -1;
-  pr.server = const_cast<char*>(GRPC_PORT_SERVER_ADDRESS);
-  pr.ctx = &context;
+    req.host = const_cast<char*>(GRPC_PORT_SERVER_ADDRESS);
+    req.http.path = const_cast<char*>("/get");
 
-  req.host = const_cast<char*>(GRPC_PORT_SERVER_ADDRESS);
-  req.http.path = const_cast<char*>("/get");
-
-  grpc_httpcli_context_init(&context);
-  grpc_resource_quota* resource_quota =
-      grpc_resource_quota_create("port_server_client/pick");
-  grpc_httpcli_get(
-      &exec_ctx, &context, &pr.pops, resource_quota, &req,
-      grpc_exec_ctx_now(&exec_ctx) + 30 * GPR_MS_PER_SEC,
-      GRPC_CLOSURE_CREATE(got_port_from_server, &pr, grpc_schedule_on_exec_ctx),
-      &pr.response);
-  grpc_resource_quota_unref_internal(&exec_ctx, resource_quota);
-  grpc_exec_ctx_flush(&exec_ctx);
-  gpr_mu_lock(pr.mu);
-  while (pr.port == -1) {
-    grpc_pollset_worker* worker = nullptr;
-    if (!GRPC_LOG_IF_ERROR(
-            "pollset_work",
-            grpc_pollset_work(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
-                              &worker,
-                              grpc_exec_ctx_now(&exec_ctx) + GPR_MS_PER_SEC))) {
-      pr.port = 0;
+    grpc_httpcli_context_init(&context);
+    grpc_resource_quota* resource_quota =
+        grpc_resource_quota_create("port_server_client/pick");
+    grpc_httpcli_get(&context, &pr.pops, resource_quota, &req,
+                     grpc_core::ExecCtx::Get()->Now() + 30 * GPR_MS_PER_SEC,
+                     GRPC_CLOSURE_CREATE(got_port_from_server, &pr,
+                                         grpc_schedule_on_exec_ctx),
+                     &pr.response);
+    grpc_resource_quota_unref_internal(resource_quota);
+    grpc_core::ExecCtx::Get()->Flush();
+    gpr_mu_lock(pr.mu);
+    while (pr.port == -1) {
+      grpc_pollset_worker* worker = nullptr;
+      if (!GRPC_LOG_IF_ERROR(
+              "pollset_work",
+              grpc_pollset_work(
+                  grpc_polling_entity_pollset(&pr.pops), &worker,
+                  grpc_core::ExecCtx::Get()->Now() + GPR_MS_PER_SEC))) {
+        pr.port = 0;
+      }
     }
-  }
-  gpr_mu_unlock(pr.mu);
+    gpr_mu_unlock(pr.mu);
 
-  grpc_http_response_destroy(&pr.response);
-  grpc_httpcli_context_destroy(&exec_ctx, &context);
-  grpc_pollset_shutdown(&exec_ctx, grpc_polling_entity_pollset(&pr.pops),
-                        shutdown_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
+    grpc_http_response_destroy(&pr.response);
+    grpc_httpcli_context_destroy(&context);
+    grpc_pollset_shutdown(grpc_polling_entity_pollset(&pr.pops),
+                          shutdown_closure);
+
+    grpc_core::ExecCtx::Get()->Flush();
+  }
   grpc_shutdown();
 
   return pr.port;
diff --git a/test/core/util/reconnect_server.cc b/test/core/util/reconnect_server.cc
index 4775b07..bcafc4e 100644
--- a/test/core/util/reconnect_server.cc
+++ b/test/core/util/reconnect_server.cc
@@ -55,7 +55,7 @@
   }
 }
 
-static void on_connect(grpc_exec_ctx* exec_ctx, void* arg, grpc_endpoint* tcp,
+static void on_connect(void* arg, grpc_endpoint* tcp,
                        grpc_pollset* accepting_pollset,
                        grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
@@ -65,9 +65,9 @@
   gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
   timestamp_list* new_tail;
   peer = grpc_endpoint_get_peer(tcp);
-  grpc_endpoint_shutdown(exec_ctx, tcp,
+  grpc_endpoint_shutdown(tcp,
                          GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
-  grpc_endpoint_destroy(exec_ctx, tcp);
+  grpc_endpoint_destroy(tcp);
   if (peer) {
     last_colon = strrchr(peer, ':');
     if (server->peer == nullptr) {
diff --git a/test/core/util/test_tcp_server.cc b/test/core/util/test_tcp_server.cc
index da34da6..5f6af4e 100644
--- a/test/core/util/test_tcp_server.cc
+++ b/test/core/util/test_tcp_server.cc
@@ -33,8 +33,7 @@
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
-static void on_server_destroyed(grpc_exec_ctx* exec_ctx, void* data,
-                                grpc_error* error) {
+static void on_server_destroyed(void* data, grpc_error* error) {
   test_tcp_server* server = static_cast<test_tcp_server*>(data);
   server->shutdown = 1;
 }
@@ -56,51 +55,46 @@
   grpc_resolved_address resolved_addr;
   struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
   int port_added;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   addr->sin_family = AF_INET;
   addr->sin_port = htons((uint16_t)port);
   memset(&addr->sin_addr, 0, sizeof(addr->sin_addr));
 
-  grpc_error* error = grpc_tcp_server_create(
-      &exec_ctx, &server->shutdown_complete, nullptr, &server->tcp_server);
+  grpc_error* error = grpc_tcp_server_create(&server->shutdown_complete,
+                                             nullptr, &server->tcp_server);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   error =
       grpc_tcp_server_add_port(server->tcp_server, &resolved_addr, &port_added);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(port_added == port);
 
-  grpc_tcp_server_start(&exec_ctx, server->tcp_server, &server->pollset, 1,
+  grpc_tcp_server_start(server->tcp_server, &server->pollset, 1,
                         server->on_connect, server->cb_data);
   gpr_log(GPR_INFO, "test tcp server listening on 0.0.0.0:%d", port);
-
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_tcp_server_poll(test_tcp_server* server, int seconds) {
   grpc_pollset_worker* worker = nullptr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_millis deadline = grpc_timespec_to_millis_round_up(
       grpc_timeout_seconds_to_deadline(seconds));
   gpr_mu_lock(server->mu);
-  GRPC_LOG_IF_ERROR(
-      "pollset_work",
-      grpc_pollset_work(&exec_ctx, server->pollset, &worker, deadline));
+  GRPC_LOG_IF_ERROR("pollset_work",
+                    grpc_pollset_work(server->pollset, &worker, deadline));
   gpr_mu_unlock(server->mu);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void do_nothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
-static void finish_pollset(grpc_exec_ctx* exec_ctx, void* arg,
-                           grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(arg));
+static void do_nothing(void* arg, grpc_error* error) {}
+static void finish_pollset(void* arg, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(arg));
 }
 
 void test_tcp_server_destroy(test_tcp_server* server) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_timespec shutdown_deadline;
   grpc_closure do_nothing_cb;
-  grpc_tcp_server_unref(&exec_ctx, server->tcp_server);
+  grpc_tcp_server_unref(server->tcp_server);
   GRPC_CLOSURE_INIT(&do_nothing_cb, do_nothing, nullptr,
                     grpc_schedule_on_exec_ctx);
   shutdown_deadline = gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
@@ -109,10 +103,10 @@
          gpr_time_cmp(gpr_now(GPR_CLOCK_MONOTONIC), shutdown_deadline) < 0) {
     test_tcp_server_poll(server, 1);
   }
-  grpc_pollset_shutdown(&exec_ctx, server->pollset,
+  grpc_pollset_shutdown(server->pollset,
                         GRPC_CLOSURE_CREATE(finish_pollset, server->pollset,
                                             grpc_schedule_on_exec_ctx));
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(server->pollset);
   grpc_shutdown();
 }
diff --git a/test/core/util/trickle_endpoint.cc b/test/core/util/trickle_endpoint.cc
index 4544fb7..f95ed62 100644
--- a/test/core/util/trickle_endpoint.cc
+++ b/test/core/util/trickle_endpoint.cc
@@ -45,24 +45,23 @@
   grpc_closure* write_cb;
 } trickle_endpoint;
 
-static void te_read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                    grpc_slice_buffer* slices, grpc_closure* cb) {
+static void te_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                    grpc_closure* cb) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_read(exec_ctx, te->wrapped, slices, cb);
+  grpc_endpoint_read(te->wrapped, slices, cb);
 }
 
-static void maybe_call_write_cb_locked(grpc_exec_ctx* exec_ctx,
-                                       trickle_endpoint* te) {
+static void maybe_call_write_cb_locked(trickle_endpoint* te) {
   if (te->write_cb != nullptr &&
       (te->error != GRPC_ERROR_NONE ||
        te->write_buffer.length <= WRITE_BUFFER_SIZE)) {
-    GRPC_CLOSURE_SCHED(exec_ctx, te->write_cb, GRPC_ERROR_REF(te->error));
+    GRPC_CLOSURE_SCHED(te->write_cb, GRPC_ERROR_REF(te->error));
     te->write_cb = nullptr;
   }
 }
 
-static void te_write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                     grpc_slice_buffer* slices, grpc_closure* cb) {
+static void te_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                     grpc_closure* cb) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
   gpr_mu_lock(&te->mu);
   GPR_ASSERT(te->write_cb == nullptr);
@@ -74,47 +73,44 @@
                           grpc_slice_copy(slices->slices[i]));
   }
   te->write_cb = cb;
-  maybe_call_write_cb_locked(exec_ctx, te);
+  maybe_call_write_cb_locked(te);
   gpr_mu_unlock(&te->mu);
 }
 
-static void te_add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                              grpc_pollset* pollset) {
+static void te_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_add_to_pollset(exec_ctx, te->wrapped, pollset);
+  grpc_endpoint_add_to_pollset(te->wrapped, pollset);
 }
 
-static void te_add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
+static void te_add_to_pollset_set(grpc_endpoint* ep,
                                   grpc_pollset_set* pollset_set) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_add_to_pollset_set(exec_ctx, te->wrapped, pollset_set);
+  grpc_endpoint_add_to_pollset_set(te->wrapped, pollset_set);
 }
 
-static void te_delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                       grpc_endpoint* ep,
+static void te_delete_from_pollset_set(grpc_endpoint* ep,
                                        grpc_pollset_set* pollset_set) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_delete_from_pollset_set(exec_ctx, te->wrapped, pollset_set);
+  grpc_endpoint_delete_from_pollset_set(te->wrapped, pollset_set);
 }
 
-static void te_shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                        grpc_error* why) {
+static void te_shutdown(grpc_endpoint* ep, grpc_error* why) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
   gpr_mu_lock(&te->mu);
   if (te->error == GRPC_ERROR_NONE) {
     te->error = GRPC_ERROR_REF(why);
   }
-  maybe_call_write_cb_locked(exec_ctx, te);
+  maybe_call_write_cb_locked(te);
   gpr_mu_unlock(&te->mu);
-  grpc_endpoint_shutdown(exec_ctx, te->wrapped, why);
+  grpc_endpoint_shutdown(te->wrapped, why);
 }
 
-static void te_destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
+static void te_destroy(grpc_endpoint* ep) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
-  grpc_endpoint_destroy(exec_ctx, te->wrapped);
+  grpc_endpoint_destroy(te->wrapped);
   gpr_mu_destroy(&te->mu);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &te->write_buffer);
-  grpc_slice_buffer_destroy_internal(exec_ctx, &te->writing_buffer);
+  grpc_slice_buffer_destroy_internal(&te->write_buffer);
+  grpc_slice_buffer_destroy_internal(&te->writing_buffer);
   GRPC_ERROR_UNREF(te->error);
   gpr_free(te);
 }
@@ -134,8 +130,7 @@
   return grpc_endpoint_get_fd(te->wrapped);
 }
 
-static void te_finish_write(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+static void te_finish_write(void* arg, grpc_error* error) {
   trickle_endpoint* te = (trickle_endpoint*)arg;
   gpr_mu_lock(&te->mu);
   te->writing = false;
@@ -173,8 +168,7 @@
   return (double)s.tv_sec + 1e-9 * (double)s.tv_nsec;
 }
 
-size_t grpc_trickle_endpoint_trickle(grpc_exec_ctx* exec_ctx,
-                                     grpc_endpoint* ep) {
+size_t grpc_trickle_endpoint_trickle(grpc_endpoint* ep) {
   trickle_endpoint* te = (trickle_endpoint*)ep;
   gpr_mu_lock(&te->mu);
   if (!te->writing && te->write_buffer.length > 0) {
@@ -189,9 +183,9 @@
       te->writing = true;
       te->last_write = now;
       grpc_endpoint_write(
-          exec_ctx, te->wrapped, &te->writing_buffer,
+          te->wrapped, &te->writing_buffer,
           GRPC_CLOSURE_CREATE(te_finish_write, te, grpc_schedule_on_exec_ctx));
-      maybe_call_write_cb_locked(exec_ctx, te);
+      maybe_call_write_cb_locked(te);
     }
   }
   size_t backlog = te->write_buffer.length;
diff --git a/test/core/util/trickle_endpoint.h b/test/core/util/trickle_endpoint.h
index 11c113b..cd07de9 100644
--- a/test/core/util/trickle_endpoint.h
+++ b/test/core/util/trickle_endpoint.h
@@ -25,8 +25,7 @@
                                             double bytes_per_second);
 
 /* Allow up to \a bytes through the endpoint. Returns the new backlog. */
-size_t grpc_trickle_endpoint_trickle(grpc_exec_ctx* exec_ctx,
-                                     grpc_endpoint* endpoint);
+size_t grpc_trickle_endpoint_trickle(grpc_endpoint* endpoint);
 
 size_t grpc_trickle_get_backlog(grpc_endpoint* endpoint);
 
diff --git a/test/cpp/client/client_channel_stress_test.cc b/test/cpp/client/client_channel_stress_test.cc
index 0954b28..e829d52 100644
--- a/test/cpp/client/client_channel_stress_test.cc
+++ b/test/cpp/client/client_channel_stress_test.cc
@@ -212,13 +212,13 @@
   };
 
   void SetNextResolution(const std::vector<AddressData>& address_data) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_lb_addresses* addresses =
         grpc_lb_addresses_create(address_data.size(), nullptr);
     for (size_t i = 0; i < address_data.size(); ++i) {
       char* lb_uri_str;
       gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", address_data[i].port);
-      grpc_uri* lb_uri = grpc_uri_parse(&exec_ctx, lb_uri_str, true);
+      grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
       GPR_ASSERT(lb_uri != nullptr);
       grpc_lb_addresses_set_address_from_uri(
           addresses, i, lb_uri, address_data[i].is_balancer,
@@ -228,10 +228,9 @@
     }
     grpc_arg fake_addresses = grpc_lb_addresses_create_channel_arg(addresses);
     grpc_channel_args fake_result = {1, &fake_addresses};
-    grpc_fake_resolver_response_generator_set_response(
-        &exec_ctx, response_generator_, &fake_result);
-    grpc_lb_addresses_destroy(&exec_ctx, addresses);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_fake_resolver_response_generator_set_response(response_generator_,
+                                                       &fake_result);
+    grpc_lb_addresses_destroy(addresses);
   }
 
   void KeepSendingRequests() {
diff --git a/test/cpp/common/channel_arguments_test.cc b/test/cpp/common/channel_arguments_test.cc
index d6ed2e5..f330c01 100644
--- a/test/cpp/common/channel_arguments_test.cc
+++ b/test/cpp/common/channel_arguments_test.cc
@@ -249,5 +249,8 @@
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/test/cpp/common/channel_filter_test.cc b/test/cpp/common/channel_filter_test.cc
index 6385181..7bdd53f 100644
--- a/test/cpp/common/channel_filter_test.cc
+++ b/test/cpp/common/channel_filter_test.cc
@@ -28,7 +28,7 @@
  public:
   MyChannelData() {}
 
-  grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  grpc_error* Init(grpc_channel_element* elem,
                    grpc_channel_element_args* args) override {
     (void)args->channel_args;  // Make sure field is available.
     return GRPC_ERROR_NONE;
@@ -39,7 +39,7 @@
  public:
   MyCallData() {}
 
-  grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+  grpc_error* Init(grpc_call_element* elem,
                    const grpc_call_element_args* args) override {
     (void)args->path;  // Make sure field is available.
     return GRPC_ERROR_NONE;
diff --git a/test/cpp/end2end/client_lb_end2end_test.cc b/test/cpp/end2end/client_lb_end2end_test.cc
index f8bb12f..e83a6e6 100644
--- a/test/cpp/end2end/client_lb_end2end_test.cc
+++ b/test/cpp/end2end/client_lb_end2end_test.cc
@@ -112,13 +112,13 @@
   }
 
   void SetNextResolution(const std::vector<int>& ports) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_lb_addresses* addresses =
         grpc_lb_addresses_create(ports.size(), nullptr);
     for (size_t i = 0; i < ports.size(); ++i) {
       char* lb_uri_str;
       gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", ports[i]);
-      grpc_uri* lb_uri = grpc_uri_parse(&exec_ctx, lb_uri_str, true);
+      grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
       GPR_ASSERT(lb_uri != nullptr);
       grpc_lb_addresses_set_address_from_uri(addresses, i, lb_uri,
                                              false /* is balancer */,
@@ -130,11 +130,10 @@
         grpc_lb_addresses_create_channel_arg(addresses);
     grpc_channel_args* fake_result =
         grpc_channel_args_copy_and_add(nullptr, &fake_addresses, 1);
-    grpc_fake_resolver_response_generator_set_response(
-        &exec_ctx, response_generator_, fake_result);
-    grpc_channel_args_destroy(&exec_ctx, fake_result);
-    grpc_lb_addresses_destroy(&exec_ctx, addresses);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_fake_resolver_response_generator_set_response(response_generator_,
+                                                       fake_result);
+    grpc_channel_args_destroy(fake_result);
+    grpc_lb_addresses_destroy(addresses);
   }
 
   void ResetStub(const grpc::string& lb_policy_name = "") {
@@ -156,7 +155,7 @@
     stub_ = grpc::testing::EchoTestService::NewStub(channel_);
   }
 
-  Status SendRpc(EchoResponse* response = nullptr) {
+  bool SendRpc(EchoResponse* response = nullptr) {
     const bool local_response = (response == nullptr);
     if (local_response) response = new EchoResponse;
     EchoRequest request;
@@ -164,19 +163,19 @@
     ClientContext context;
     Status status = stub_->Echo(&context, request, response);
     if (local_response) delete response;
-    return status;
+    return status.ok();
   }
 
   void CheckRpcSendOk() {
     EchoResponse response;
-    const Status status = SendRpc(&response);
-    EXPECT_TRUE(status.ok());
+    const bool success = SendRpc(&response);
+    EXPECT_TRUE(success);
     EXPECT_EQ(response.message(), kRequestMessage_);
   }
 
   void CheckRpcSendFailure() {
-    const Status status = SendRpc();
-    EXPECT_FALSE(status.ok());
+    const bool success = SendRpc();
+    EXPECT_FALSE(success);
   }
 
   struct ServerData {
@@ -573,15 +572,28 @@
     CheckRpcSendOk();
   }
   // Kill all servers
+  gpr_log(GPR_INFO, "****** ABOUT TO KILL SERVERS *******");
   for (size_t i = 0; i < servers_.size(); ++i) {
     servers_[i]->Shutdown(false);
   }
-  // Client request should fail.
-  CheckRpcSendFailure();
+  gpr_log(GPR_INFO, "****** SERVERS KILLED *******");
+  gpr_log(GPR_INFO, "****** SENDING DOOMED REQUESTS *******");
+  // Client requests should fail. Send enough to tickle all subchannels.
+  for (size_t i = 0; i < servers_.size(); ++i) CheckRpcSendFailure();
+  gpr_log(GPR_INFO, "****** DOOMED REQUESTS SENT *******");
   // Bring servers back up on the same port (we aren't recreating the channel).
+  gpr_log(GPR_INFO, "****** RESTARTING SERVERS *******");
   StartServers(kNumServers, ports);
-  // Client request should succeed.
-  CheckRpcSendOk();
+  gpr_log(GPR_INFO, "****** SERVERS RESTARTED *******");
+  gpr_log(GPR_INFO, "****** SENDING REQUEST TO SUCCEED *******");
+  // Client request should eventually (but still fairly soon) succeed.
+  const gpr_timespec deadline = grpc_timeout_seconds_to_deadline(5);
+  gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+  while (gpr_time_cmp(deadline, now) > 0) {
+    if (SendRpc()) break;
+    now = gpr_now(GPR_CLOCK_MONOTONIC);
+  }
+  GPR_ASSERT(gpr_time_cmp(deadline, now) > 0);
 }
 
 }  // namespace
diff --git a/test/cpp/end2end/filter_end2end_test.cc b/test/cpp/end2end/filter_end2end_test.cc
index f260ea0..c443037 100644
--- a/test/cpp/end2end/filter_end2end_test.cc
+++ b/test/cpp/end2end/filter_end2end_test.cc
@@ -100,7 +100,7 @@
 
 class ChannelDataImpl : public ChannelData {
  public:
-  grpc_error* Init(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+  grpc_error* Init(grpc_channel_element* elem,
                    grpc_channel_element_args* args) {
     IncrementConnectionCounter();
     return GRPC_ERROR_NONE;
@@ -109,13 +109,12 @@
 
 class CallDataImpl : public CallData {
  public:
-  void StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+  void StartTransportStreamOpBatch(grpc_call_element* elem,
                                    TransportStreamOpBatch* op) override {
     // Incrementing the counter could be done from Init(), but we want
     // to test that the individual methods are actually called correctly.
     if (op->recv_initial_metadata() != nullptr) IncrementCallCounter();
-    grpc_call_next_op(exec_ctx, elem, op->op());
+    grpc_call_next_op(elem, op->op());
   }
 };
 
diff --git a/test/cpp/end2end/grpclb_end2end_test.cc b/test/cpp/end2end/grpclb_end2end_test.cc
index c15ab88..d4ee6b4 100644
--- a/test/cpp/end2end/grpclb_end2end_test.cc
+++ b/test/cpp/end2end/grpclb_end2end_test.cc
@@ -353,11 +353,6 @@
           "balancer", server_host_, balancers_.back().get()));
     }
     ResetStub();
-    std::vector<AddressData> addresses;
-    for (size_t i = 0; i < balancer_servers_.size(); ++i) {
-      addresses.emplace_back(AddressData{balancer_servers_[i].port_, true, ""});
-    }
-    SetNextResolution(addresses);
   }
 
   void TearDown() override {
@@ -370,6 +365,14 @@
     grpc_fake_resolver_response_generator_unref(response_generator_);
   }
 
+  void SetNextResolutionAllBalancers() {
+    std::vector<AddressData> addresses;
+    for (size_t i = 0; i < balancer_servers_.size(); ++i) {
+      addresses.emplace_back(AddressData{balancer_servers_[i].port_, true, ""});
+    }
+    SetNextResolution(addresses);
+  }
+
   void ResetStub(int fallback_timeout = 0) {
     ChannelArguments args;
     args.SetGrpclbFallbackTimeout(fallback_timeout);
@@ -451,13 +454,13 @@
   };
 
   void SetNextResolution(const std::vector<AddressData>& address_data) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     grpc_lb_addresses* addresses =
         grpc_lb_addresses_create(address_data.size(), nullptr);
     for (size_t i = 0; i < address_data.size(); ++i) {
       char* lb_uri_str;
       gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", address_data[i].port);
-      grpc_uri* lb_uri = grpc_uri_parse(&exec_ctx, lb_uri_str, true);
+      grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
       GPR_ASSERT(lb_uri != nullptr);
       grpc_lb_addresses_set_address_from_uri(
           addresses, i, lb_uri, address_data[i].is_balancer,
@@ -467,10 +470,9 @@
     }
     grpc_arg fake_addresses = grpc_lb_addresses_create_channel_arg(addresses);
     grpc_channel_args fake_result = {1, &fake_addresses};
-    grpc_fake_resolver_response_generator_set_response(
-        &exec_ctx, response_generator_, &fake_result);
-    grpc_lb_addresses_destroy(&exec_ctx, addresses);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_fake_resolver_response_generator_set_response(response_generator_,
+                                                       &fake_result);
+    grpc_lb_addresses_destroy(addresses);
   }
 
   const std::vector<int> GetBackendPorts(const size_t start_index = 0) const {
@@ -581,6 +583,7 @@
 };
 
 TEST_F(SingleBalancerTest, Vanilla) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 100;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
@@ -608,6 +611,7 @@
 }
 
 TEST_F(SingleBalancerTest, InitiallyEmptyServerlist) {
+  SetNextResolutionAllBalancers();
   const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
   const int kCallDeadlineMs = 1000 * grpc_test_slowdown_factor();
 
@@ -645,6 +649,7 @@
 }
 
 TEST_F(SingleBalancerTest, Fallback) {
+  SetNextResolutionAllBalancers();
   const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
   const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
   const size_t kNumBackendInResolution = backends_.size() / 2;
@@ -711,6 +716,7 @@
 }
 
 TEST_F(SingleBalancerTest, FallbackUpdate) {
+  SetNextResolutionAllBalancers();
   const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
   const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
   const size_t kNumBackendInResolution = backends_.size() / 3;
@@ -818,6 +824,7 @@
 }
 
 TEST_F(SingleBalancerTest, BackendsRestart) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 100;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
@@ -857,6 +864,7 @@
 };
 
 TEST_F(UpdatesTest, UpdateBalancers) {
+  SetNextResolutionAllBalancers();
   const std::vector<int> first_backend{GetBackendPorts()[0]};
   const std::vector<int> second_backend{GetBackendPorts()[1]};
   ScheduleResponseForBalancer(
@@ -919,6 +927,7 @@
 // verify that the LB channel inside grpclb keeps the initial connection (which
 // by definition is also present in the update).
 TEST_F(UpdatesTest, UpdateBalancersRepeated) {
+  SetNextResolutionAllBalancers();
   const std::vector<int> first_backend{GetBackendPorts()[0]};
   const std::vector<int> second_backend{GetBackendPorts()[0]};
 
@@ -989,6 +998,9 @@
 }
 
 TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) {
+  std::vector<AddressData> addresses;
+  addresses.emplace_back(AddressData{balancer_servers_[0].port_, true, ""});
+  SetNextResolution(addresses);
   const std::vector<int> first_backend{GetBackendPorts()[0]};
   const std::vector<int> second_backend{GetBackendPorts()[1]};
 
@@ -1030,7 +1042,7 @@
   EXPECT_EQ(0U, balancer_servers_[2].service_->request_count());
   EXPECT_EQ(0U, balancer_servers_[2].service_->response_count());
 
-  std::vector<AddressData> addresses;
+  addresses.clear();
   addresses.emplace_back(AddressData{balancer_servers_[1].port_, true, ""});
   gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
   SetNextResolution(addresses);
@@ -1055,8 +1067,14 @@
   balancers_[2]->NotifyDoneWithServerlists();
   EXPECT_EQ(1U, balancer_servers_[0].service_->request_count());
   EXPECT_EQ(1U, balancer_servers_[0].service_->response_count());
-  EXPECT_EQ(1U, balancer_servers_[1].service_->request_count());
-  EXPECT_EQ(1U, balancer_servers_[1].service_->response_count());
+  // The second balancer, published as part of the first update, may end up
+  // getting two requests (that is, 1 <= #req <= 2) if the LB call retry timer
+  // firing races with the arrival of the update containing the second
+  // balancer.
+  EXPECT_GE(balancer_servers_[1].service_->request_count(), 1U);
+  EXPECT_GE(balancer_servers_[1].service_->response_count(), 1U);
+  EXPECT_LE(balancer_servers_[1].service_->request_count(), 2U);
+  EXPECT_LE(balancer_servers_[1].service_->response_count(), 2U);
   EXPECT_EQ(0U, balancer_servers_[2].service_->request_count());
   EXPECT_EQ(0U, balancer_servers_[2].service_->response_count());
   // Check LB policy name for the channel.
@@ -1064,6 +1082,7 @@
 }
 
 TEST_F(SingleBalancerTest, Drop) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 100;
   const int num_of_drop_by_rate_limiting_addresses = 1;
   const int num_of_drop_by_load_balancing_addresses = 2;
@@ -1107,6 +1126,7 @@
 }
 
 TEST_F(SingleBalancerTest, DropAllFirst) {
+  SetNextResolutionAllBalancers();
   // All registered addresses are marked as "drop".
   const int num_of_drop_by_rate_limiting_addresses = 1;
   const int num_of_drop_by_load_balancing_addresses = 1;
@@ -1122,6 +1142,7 @@
 }
 
 TEST_F(SingleBalancerTest, DropAll) {
+  SetNextResolutionAllBalancers();
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
       0);
@@ -1152,6 +1173,7 @@
 };
 
 TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 100;
   ScheduleResponseForBalancer(
       0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
@@ -1186,6 +1208,7 @@
 }
 
 TEST_F(SingleBalancerWithClientLoadReportingTest, Drop) {
+  SetNextResolutionAllBalancers();
   const size_t kNumRpcsPerAddress = 3;
   const int num_of_drop_by_rate_limiting_addresses = 2;
   const int num_of_drop_by_load_balancing_addresses = 1;
diff --git a/test/cpp/grpclb/grpclb_api_test.cc b/test/cpp/grpclb/grpclb_api_test.cc
index 7b62080..1f2ef0c 100644
--- a/test/cpp/grpclb/grpclb_api_test.cc
+++ b/test/cpp/grpclb/grpclb_api_test.cc
@@ -17,6 +17,7 @@
  */
 
 #include <grpc++/impl/codegen/config.h>
+#include <grpc/grpc.h>
 #include <gtest/gtest.h>
 
 #include "src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h"
@@ -98,9 +99,6 @@
   server->set_port(54321);
   server->set_load_balance_token("load_balancing");
   server->set_drop(true);
-  auto* expiration_interval = serverlist->mutable_expiration_interval();
-  expiration_interval->set_seconds(888);
-  expiration_interval->set_nanos(999);
 
   const grpc::string encoded_response = response.SerializeAsString();
   const grpc_slice encoded_slice = grpc_slice_from_copied_buffer(
@@ -121,11 +119,6 @@
   EXPECT_STREQ(c_serverlist->servers[1]->load_balance_token, "load_balancing");
   EXPECT_TRUE(c_serverlist->servers[1]->drop);
 
-  EXPECT_TRUE(c_serverlist->expiration_interval.has_seconds);
-  EXPECT_EQ(c_serverlist->expiration_interval.seconds, 888);
-  EXPECT_TRUE(c_serverlist->expiration_interval.has_nanos);
-  EXPECT_EQ(c_serverlist->expiration_interval.nanos, 999);
-
   grpc_slice_unref(encoded_slice);
   grpc_grpclb_destroy_serverlist(c_serverlist);
 }
@@ -135,5 +128,8 @@
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/test/cpp/grpclb/grpclb_test.cc b/test/cpp/grpclb/grpclb_test.cc
index ca846c7..38b65fb 100644
--- a/test/cpp/grpclb/grpclb_test.cc
+++ b/test/cpp/grpclb/grpclb_test.cc
@@ -113,10 +113,9 @@
 
 static void* tag(intptr_t t) { return (void*)t; }
 
-static grpc_slice build_response_payload_slice(
-    const char* host, int* ports, size_t nports,
-    int64_t expiration_interval_secs, int32_t expiration_interval_nanos,
-    const char* token_prefix) {
+static grpc_slice build_response_payload_slice(const char* host, int* ports,
+                                               size_t nports,
+                                               const char* token_prefix) {
   // server_list {
   //   servers {
   //     ip_address: <in_addr/6 bytes of an IP>
@@ -128,15 +127,6 @@
   grpc::lb::v1::LoadBalanceResponse response;
   auto* serverlist = response.mutable_server_list();
 
-  if (expiration_interval_secs > 0 || expiration_interval_nanos > 0) {
-    auto* expiration_interval = serverlist->mutable_expiration_interval();
-    if (expiration_interval_secs > 0) {
-      expiration_interval->set_seconds(expiration_interval_secs);
-    }
-    if (expiration_interval_nanos > 0) {
-      expiration_interval->set_nanos(expiration_interval_nanos);
-    }
-  }
   for (size_t i = 0; i < nports; i++) {
     auto* server = serverlist->add_servers();
     // TODO(dgq): test ipv6
@@ -248,13 +238,13 @@
     if (i == 0) {
       // First half of the ports.
       response_payload_slice = build_response_payload_slice(
-          "127.0.0.1", ports, nports / 2, -1, -1, sf->lb_token_prefix);
+          "127.0.0.1", ports, nports / 2, sf->lb_token_prefix);
     } else {
       // Second half of the ports.
       sleep_ms(update_delay_ms);
       response_payload_slice = build_response_payload_slice(
-          "127.0.0.1", ports + (nports / 2), (nports + 1) / 2 /* ceil */, -1,
-          -1, "" /* this half doesn't get to receive an LB token */);
+          "127.0.0.1", ports + (nports / 2), (nports + 1) / 2 /* ceil */,
+          "" /* this half doesn't get to receive an LB token */);
     }
 
     response_payload = grpc_raw_byte_buffer_create(&response_payload_slice, 1);
@@ -562,7 +552,7 @@
 #define BALANCERS_NAME "lb.name"
 static void setup_client(const server_fixture* lb_server,
                          const server_fixture* backends, client_fixture* cf) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
 
   char* expected_target_names = nullptr;
   const char* backends_name = lb_server->servers_hostport;
@@ -574,7 +564,7 @@
   grpc_lb_addresses* addresses = grpc_lb_addresses_create(1, nullptr);
   char* lb_uri_str;
   gpr_asprintf(&lb_uri_str, "ipv4:%s", lb_server->servers_hostport);
-  grpc_uri* lb_uri = grpc_uri_parse(&exec_ctx, lb_uri_str, true);
+  grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
   GPR_ASSERT(lb_uri != nullptr);
   grpc_lb_addresses_set_address_from_uri(addresses, 0, lb_uri, true,
                                          lb_server->balancer_name, nullptr);
@@ -586,7 +576,7 @@
       grpc_lb_addresses_create_channel_arg(addresses);
   grpc_channel_args* fake_result =
       grpc_channel_args_copy_and_add(nullptr, &fake_addresses, 1);
-  grpc_lb_addresses_destroy(&exec_ctx, addresses);
+  grpc_lb_addresses_destroy(addresses);
 
   const grpc_arg new_args[] = {
       grpc_fake_transport_expected_targets_arg(expected_target_names),
@@ -601,13 +591,12 @@
       grpc_fake_transport_security_credentials_create();
   cf->client =
       grpc_secure_channel_create(fake_creds, cf->server_uri, args, nullptr);
-  grpc_fake_resolver_response_generator_set_response(
-      &exec_ctx, response_generator, fake_result);
-  grpc_channel_args_destroy(&exec_ctx, fake_result);
-  grpc_channel_credentials_unref(&exec_ctx, fake_creds);
-  grpc_channel_args_destroy(&exec_ctx, args);
+  grpc_fake_resolver_response_generator_set_response(response_generator,
+                                                     fake_result);
+  grpc_channel_args_destroy(fake_result);
+  grpc_channel_credentials_unref(fake_creds);
+  grpc_channel_args_destroy(args);
   grpc_fake_resolver_response_generator_unref(response_generator);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void teardown_client(client_fixture* cf) {
@@ -703,14 +692,15 @@
       tf.lb_backends[i].lb_token_prefix = "";
     }
     setup_server("127.0.0.1", &tf.lb_backends[i]);
-    gpr_thd_new(&tf.lb_backends[i].tid, fork_backend_server, &tf.lb_backends[i],
-                &options);
+    gpr_thd_new(&tf.lb_backends[i].tid, "grpclb_backend", fork_backend_server,
+                &tf.lb_backends[i], &options);
   }
 
   tf.lb_server.lb_token_prefix = LB_TOKEN_PREFIX;
   tf.lb_server.balancer_name = BALANCERS_NAME;
   setup_server("127.0.0.1", &tf.lb_server);
-  gpr_thd_new(&tf.lb_server.tid, fork_lb_server, &tf.lb_server, &options);
+  gpr_thd_new(&tf.lb_server.tid, "grpclb_server", fork_lb_server, &tf.lb_server,
+              &options);
   setup_client(&tf.lb_server, tf.lb_backends, &tf.client);
   return tf;
 }
diff --git a/test/cpp/microbenchmarks/bm_call_create.cc b/test/cpp/microbenchmarks/bm_call_create.cc
index a45c577..5c2c38c 100644
--- a/test/cpp/microbenchmarks/bm_call_create.cc
+++ b/test/cpp/microbenchmarks/bm_call_create.cc
@@ -311,12 +311,9 @@
 }
 BENCHMARK(BM_LameChannelCallCreateCoreSeparateBatch);
 
-static void FilterDestroy(grpc_exec_ctx* exec_ctx, void* arg,
-                          grpc_error* error) {
-  gpr_free(arg);
-}
+static void FilterDestroy(void* arg, grpc_error* error) { gpr_free(arg); }
 
-static void DoNothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void DoNothing(void* arg, grpc_error* error) {}
 
 class FakeClientChannelFactory : public grpc_client_channel_factory {
  public:
@@ -324,15 +321,12 @@
 
  private:
   static void NoRef(grpc_client_channel_factory* factory) {}
-  static void NoUnref(grpc_exec_ctx* exec_ctx,
-                      grpc_client_channel_factory* factory) {}
-  static grpc_subchannel* CreateSubchannel(grpc_exec_ctx* exec_ctx,
-                                           grpc_client_channel_factory* factory,
+  static void NoUnref(grpc_client_channel_factory* factory) {}
+  static grpc_subchannel* CreateSubchannel(grpc_client_channel_factory* factory,
                                            const grpc_subchannel_args* args) {
     return nullptr;
   }
-  static grpc_channel* CreateClientChannel(grpc_exec_ctx* exec_ctx,
-                                           grpc_client_channel_factory* factory,
+  static grpc_channel* CreateClientChannel(grpc_client_channel_factory* factory,
                                            const char* target,
                                            grpc_client_channel_type type,
                                            const grpc_channel_args* args) {
@@ -366,36 +360,32 @@
 
 namespace dummy_filter {
 
-static void StartTransportStreamOp(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void StartTransportStreamOp(grpc_call_element* elem,
                                    grpc_transport_stream_op_batch* op) {}
 
-static void StartTransportOp(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_element* elem,
+static void StartTransportOp(grpc_channel_element* elem,
                              grpc_transport_op* op) {}
 
-static grpc_error* InitCallElem(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem,
+static grpc_error* InitCallElem(grpc_call_element* elem,
                                 const grpc_call_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-static void SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void SetPollsetOrPollsetSet(grpc_call_element* elem,
                                    grpc_polling_entity* pollent) {}
 
-static void DestroyCallElem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void DestroyCallElem(grpc_call_element* elem,
                             const grpc_call_final_info* final_info,
                             grpc_closure* then_sched_closure) {}
 
-grpc_error* InitChannelElem(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+grpc_error* InitChannelElem(grpc_channel_element* elem,
                             grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-void DestroyChannelElem(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem) {}
+void DestroyChannelElem(grpc_channel_element* elem) {}
 
-void GetChannelInfo(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+void GetChannelInfo(grpc_channel_element* elem,
                     const grpc_channel_info* channel_info) {}
 
 static const grpc_channel_filter dummy_filter = {StartTransportStreamOp,
@@ -422,41 +412,38 @@
 const char* name;
 
 /* implementation of grpc_transport_init_stream */
-int InitStream(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-               grpc_stream* stream, grpc_stream_refcount* refcount,
-               const void* server_data, gpr_arena* arena) {
+int InitStream(grpc_transport* self, grpc_stream* stream,
+               grpc_stream_refcount* refcount, const void* server_data,
+               gpr_arena* arena) {
   return 0;
 }
 
 /* implementation of grpc_transport_set_pollset */
-void SetPollset(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                grpc_stream* stream, grpc_pollset* pollset) {}
+void SetPollset(grpc_transport* self, grpc_stream* stream,
+                grpc_pollset* pollset) {}
 
 /* implementation of grpc_transport_set_pollset */
-void SetPollsetSet(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                   grpc_stream* stream, grpc_pollset_set* pollset_set) {}
+void SetPollsetSet(grpc_transport* self, grpc_stream* stream,
+                   grpc_pollset_set* pollset_set) {}
 
 /* implementation of grpc_transport_perform_stream_op */
-void PerformStreamOp(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                     grpc_stream* stream, grpc_transport_stream_op_batch* op) {
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_complete, GRPC_ERROR_NONE);
+void PerformStreamOp(grpc_transport* self, grpc_stream* stream,
+                     grpc_transport_stream_op_batch* op) {
+  GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_NONE);
 }
 
 /* implementation of grpc_transport_perform_op */
-void PerformOp(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-               grpc_transport_op* op) {}
+void PerformOp(grpc_transport* self, grpc_transport_op* op) {}
 
 /* implementation of grpc_transport_destroy_stream */
-void DestroyStream(grpc_exec_ctx* exec_ctx, grpc_transport* self,
-                   grpc_stream* stream, grpc_closure* then_sched_closure) {}
+void DestroyStream(grpc_transport* self, grpc_stream* stream,
+                   grpc_closure* then_sched_closure) {}
 
 /* implementation of grpc_transport_destroy */
-void Destroy(grpc_exec_ctx* exec_ctx, grpc_transport* self) {}
+void Destroy(grpc_transport* self) {}
 
 /* implementation of grpc_transport_get_endpoint */
-grpc_endpoint* GetEndpoint(grpc_exec_ctx* exec_ctx, grpc_transport* self) {
-  return nullptr;
-}
+grpc_endpoint* GetEndpoint(grpc_transport* self) { return nullptr; }
 
 static const grpc_transport_vtable dummy_transport_vtable = {
     0,          "dummy_http2", InitStream,
@@ -472,8 +459,8 @@
  public:
   class Op {
    public:
-    Op(grpc_exec_ctx* exec_ctx, NoOp* p, grpc_call_stack* s) {}
-    void Finish(grpc_exec_ctx* exec_ctx) {}
+    Op(NoOp* p, grpc_call_stack* s) {}
+    void Finish() {}
   };
 };
 
@@ -489,13 +476,11 @@
 
   class Op {
    public:
-    Op(grpc_exec_ctx* exec_ctx, SendEmptyMetadata* p, grpc_call_stack* s) {
+    Op(SendEmptyMetadata* p, grpc_call_stack* s) {
       grpc_metadata_batch_init(&batch_);
       p->op_payload_.send_initial_metadata.send_initial_metadata = &batch_;
     }
-    void Finish(grpc_exec_ctx* exec_ctx) {
-      grpc_metadata_batch_destroy(exec_ctx, &batch_);
-    }
+    void Finish() { grpc_metadata_batch_destroy(&batch_); }
 
    private:
     grpc_metadata_batch batch_;
@@ -536,20 +521,20 @@
     label << " #has_dummy_filter";
   }
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   size_t channel_size = grpc_channel_stack_size(
       filters.size() == 0 ? nullptr : &filters[0], filters.size());
   grpc_channel_stack* channel_stack =
       static_cast<grpc_channel_stack*>(gpr_zalloc(channel_size));
   GPR_ASSERT(GRPC_LOG_IF_ERROR(
       "channel_stack_init",
-      grpc_channel_stack_init(&exec_ctx, 1, FilterDestroy, channel_stack,
-                              &filters[0], filters.size(), &channel_args,
+      grpc_channel_stack_init(1, FilterDestroy, channel_stack, &filters[0],
+                              filters.size(), &channel_args,
                               fixture.flags & REQUIRES_TRANSPORT
                                   ? &dummy_transport::dummy_transport
                                   : nullptr,
                               "CHANNEL", channel_stack)));
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   grpc_call_stack* call_stack =
       static_cast<grpc_call_stack*>(gpr_zalloc(channel_stack->call_stack_size));
   grpc_millis deadline = GRPC_MILLIS_INF_FUTURE;
@@ -568,12 +553,12 @@
   call_args.arena = gpr_arena_create(kArenaSize);
   while (state.KeepRunning()) {
     GPR_TIMER_SCOPE("BenchmarkCycle", 0);
-    GRPC_ERROR_UNREF(grpc_call_stack_init(&exec_ctx, channel_stack, 1,
-                                          DoNothing, nullptr, &call_args));
-    typename TestOp::Op op(&exec_ctx, &test_op_data, call_stack);
-    grpc_call_stack_destroy(&exec_ctx, call_stack, &final_info, nullptr);
-    op.Finish(&exec_ctx);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_ERROR_UNREF(
+        grpc_call_stack_init(channel_stack, 1, DoNothing, nullptr, &call_args));
+    typename TestOp::Op op(&test_op_data, call_stack);
+    grpc_call_stack_destroy(call_stack, &final_info, nullptr);
+    op.Finish();
+    grpc_core::ExecCtx::Get()->Flush();
     // recreate arena every 64k iterations to avoid oom
     if (0 == (state.iterations() & 0xffff)) {
       gpr_arena_destroy(call_args.arena);
@@ -581,8 +566,8 @@
     }
   }
   gpr_arena_destroy(call_args.arena);
-  grpc_channel_stack_destroy(&exec_ctx, channel_stack);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_channel_stack_destroy(channel_stack);
+
   gpr_free(channel_stack);
   gpr_free(call_stack);
 
@@ -632,59 +617,55 @@
   grpc_call_combiner* call_combiner;
 } call_data;
 
-static void StartTransportStreamOp(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void StartTransportStreamOp(grpc_call_element* elem,
                                    grpc_transport_stream_op_batch* op) {
   call_data* calld = static_cast<call_data*>(elem->call_data);
   if (op->recv_initial_metadata) {
     GRPC_CALL_COMBINER_START(
-        exec_ctx, calld->call_combiner,
+        calld->call_combiner,
         op->payload->recv_initial_metadata.recv_initial_metadata_ready,
         GRPC_ERROR_NONE, "recv_initial_metadata");
   }
   if (op->recv_message) {
-    GRPC_CALL_COMBINER_START(exec_ctx, calld->call_combiner,
+    GRPC_CALL_COMBINER_START(calld->call_combiner,
                              op->payload->recv_message.recv_message_ready,
                              GRPC_ERROR_NONE, "recv_message");
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_complete, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_NONE);
 }
 
-static void StartTransportOp(grpc_exec_ctx* exec_ctx,
-                             grpc_channel_element* elem,
+static void StartTransportOp(grpc_channel_element* elem,
                              grpc_transport_op* op) {
   if (op->disconnect_with_error != GRPC_ERROR_NONE) {
     GRPC_ERROR_UNREF(op->disconnect_with_error);
   }
-  GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
 }
 
-static grpc_error* InitCallElem(grpc_exec_ctx* exec_ctx,
-                                grpc_call_element* elem,
+static grpc_error* InitCallElem(grpc_call_element* elem,
                                 const grpc_call_element_args* args) {
   call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->call_combiner = args->call_combiner;
   return GRPC_ERROR_NONE;
 }
 
-static void SetPollsetOrPollsetSet(grpc_exec_ctx* exec_ctx,
-                                   grpc_call_element* elem,
+static void SetPollsetOrPollsetSet(grpc_call_element* elem,
                                    grpc_polling_entity* pollent) {}
 
-static void DestroyCallElem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
+static void DestroyCallElem(grpc_call_element* elem,
                             const grpc_call_final_info* final_info,
                             grpc_closure* then_sched_closure) {
-  GRPC_CLOSURE_SCHED(exec_ctx, then_sched_closure, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(then_sched_closure, GRPC_ERROR_NONE);
 }
 
-grpc_error* InitChannelElem(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+grpc_error* InitChannelElem(grpc_channel_element* elem,
                             grpc_channel_element_args* args) {
   return GRPC_ERROR_NONE;
 }
 
-void DestroyChannelElem(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem) {}
+void DestroyChannelElem(grpc_channel_element* elem) {}
 
-void GetChannelInfo(grpc_exec_ctx* exec_ctx, grpc_channel_element* elem,
+void GetChannelInfo(grpc_channel_element* elem,
                     const grpc_channel_info* channel_info) {}
 
 static const grpc_channel_filter isolated_call_filter = {
@@ -711,10 +692,8 @@
         builder, &isolated_call_filter::isolated_call_filter, nullptr,
         nullptr));
     {
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-      channel_ = grpc_channel_create_with_builder(&exec_ctx, builder,
-                                                  GRPC_CLIENT_CHANNEL);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_core::ExecCtx exec_ctx;
+      channel_ = grpc_channel_create_with_builder(builder, GRPC_CLIENT_CHANNEL);
     }
     cq_ = grpc_completion_queue_create_for_next(nullptr);
   }
diff --git a/test/cpp/microbenchmarks/bm_chttp2_hpack.cc b/test/cpp/microbenchmarks/bm_chttp2_hpack.cc
index 3fff8b0..4b73103 100644
--- a/test/cpp/microbenchmarks/bm_chttp2_hpack.cc
+++ b/test/cpp/microbenchmarks/bm_chttp2_hpack.cc
@@ -50,22 +50,22 @@
 
 static void BM_HpackEncoderInitDestroy(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hpack_compressor c;
   while (state.KeepRunning()) {
     grpc_chttp2_hpack_compressor_init(&c);
-    grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &c);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_chttp2_hpack_compressor_destroy(&c);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_HpackEncoderInitDestroy);
 
 static void BM_HpackEncoderEncodeDeadline(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_millis saved_now = grpc_exec_ctx_now(&exec_ctx);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_millis saved_now = grpc_core::ExecCtx::Get()->Now();
 
   grpc_metadata_batch b;
   grpc_metadata_batch_init(&b);
@@ -85,14 +85,13 @@
         (size_t)1024,
         &stats,
     };
-    grpc_chttp2_encode_header(&exec_ctx, &c, nullptr, 0, &b, &hopt, &outbuf);
-    grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, &outbuf);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_chttp2_encode_header(&c, nullptr, 0, &b, &hopt, &outbuf);
+    grpc_slice_buffer_reset_and_unref_internal(&outbuf);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_metadata_batch_destroy(&exec_ctx, &b);
-  grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &c);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &outbuf);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_metadata_batch_destroy(&b);
+  grpc_chttp2_hpack_compressor_destroy(&c);
+  grpc_slice_buffer_destroy_internal(&outbuf);
 
   std::ostringstream label;
   label << "framing_bytes/iter:"
@@ -109,17 +108,16 @@
 template <class Fixture>
 static void BM_HpackEncoderEncodeHeader(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   static bool logged_representative_output = false;
 
   grpc_metadata_batch b;
   grpc_metadata_batch_init(&b);
-  std::vector<grpc_mdelem> elems = Fixture::GetElems(&exec_ctx);
+  std::vector<grpc_mdelem> elems = Fixture::GetElems();
   std::vector<grpc_linked_mdelem> storage(elems.size());
   for (size_t i = 0; i < elems.size(); i++) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "addmd",
-        grpc_metadata_batch_add_tail(&exec_ctx, &b, &storage[i], elems[i])));
+        "addmd", grpc_metadata_batch_add_tail(&b, &storage[i], elems[i])));
   }
 
   grpc_chttp2_hpack_compressor c;
@@ -136,7 +134,7 @@
         (size_t)state.range(1),
         &stats,
     };
-    grpc_chttp2_encode_header(&exec_ctx, &c, nullptr, 0, &b, &hopt, &outbuf);
+    grpc_chttp2_encode_header(&c, nullptr, 0, &b, &hopt, &outbuf);
     if (!logged_representative_output && state.iterations() > 3) {
       logged_representative_output = true;
       for (size_t i = 0; i < outbuf.count; i++) {
@@ -145,13 +143,12 @@
         gpr_free(s);
       }
     }
-    grpc_slice_buffer_reset_and_unref_internal(&exec_ctx, &outbuf);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_slice_buffer_reset_and_unref_internal(&outbuf);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_metadata_batch_destroy(&exec_ctx, &b);
-  grpc_chttp2_hpack_compressor_destroy(&exec_ctx, &c);
-  grpc_slice_buffer_destroy_internal(&exec_ctx, &outbuf);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_metadata_batch_destroy(&b);
+  grpc_chttp2_hpack_compressor_destroy(&c);
+  grpc_slice_buffer_destroy_internal(&outbuf);
 
   std::ostringstream label;
   label << "framing_bytes/iter:"
@@ -169,15 +166,13 @@
 class EmptyBatch {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
-    return {};
-  }
+  static std::vector<grpc_mdelem> GetElems() { return {}; }
 };
 
 class SingleStaticElem {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE};
   }
 };
@@ -185,9 +180,9 @@
 class SingleInternedElem {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc")),
+        grpc_slice_intern(grpc_slice_from_static_string("abc")),
         grpc_slice_intern(grpc_slice_from_static_string("def")))};
   }
 };
@@ -196,10 +191,10 @@
 class SingleInternedBinaryElem {
  public:
   static constexpr bool kEnableTrueBinary = kTrueBinary;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     grpc_slice bytes = MakeBytes();
     std::vector<grpc_mdelem> out = {grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc-bin")),
+        grpc_slice_intern(grpc_slice_from_static_string("abc-bin")),
         grpc_slice_intern(bytes))};
     grpc_slice_unref(bytes);
     return out;
@@ -218,9 +213,9 @@
 class SingleInternedKeyElem {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc")),
+        grpc_slice_intern(grpc_slice_from_static_string("abc")),
         grpc_slice_from_static_string("def"))};
   }
 };
@@ -228,9 +223,8 @@
 class SingleNonInternedElem {
  public:
   static constexpr bool kEnableTrueBinary = false;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
-    return {grpc_mdelem_from_slices(exec_ctx,
-                                    grpc_slice_from_static_string("abc"),
+  static std::vector<grpc_mdelem> GetElems() {
+    return {grpc_mdelem_from_slices(grpc_slice_from_static_string("abc"),
                                     grpc_slice_from_static_string("def"))};
   }
 };
@@ -239,9 +233,9 @@
 class SingleNonInternedBinaryElem {
  public:
   static constexpr bool kEnableTrueBinary = kTrueBinary;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
-    return {grpc_mdelem_from_slices(
-        exec_ctx, grpc_slice_from_static_string("abc-bin"), MakeBytes())};
+  static std::vector<grpc_mdelem> GetElems() {
+    return {grpc_mdelem_from_slices(grpc_slice_from_static_string("abc-bin"),
+                                    MakeBytes())};
   }
 
  private:
@@ -257,21 +251,21 @@
 class RepresentativeClientInitialMetadata {
  public:
   static constexpr bool kEnableTrueBinary = true;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {
         GRPC_MDELEM_SCHEME_HTTP,
         GRPC_MDELEM_METHOD_POST,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_PATH,
+            GRPC_MDSTR_PATH,
             grpc_slice_intern(grpc_slice_from_static_string("/foo/bar"))),
-        grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
+        grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                 grpc_slice_intern(grpc_slice_from_static_string(
                                     "foo.test.google.fr:1234"))),
         GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP,
         GRPC_MDELEM_TE_TRAILERS,
         GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_USER_AGENT,
+            GRPC_MDSTR_USER_AGENT,
             grpc_slice_intern(grpc_slice_from_static_string(
                 "grpc-c/3.0.0-dev (linux; chttp2; green)")))};
   }
@@ -283,18 +277,18 @@
 class MoreRepresentativeClientInitialMetadata {
  public:
   static constexpr bool kEnableTrueBinary = true;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {
         GRPC_MDELEM_SCHEME_HTTP,
         GRPC_MDELEM_METHOD_POST,
-        grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_PATH,
+        grpc_mdelem_from_slices(GRPC_MDSTR_PATH,
                                 grpc_slice_intern(grpc_slice_from_static_string(
                                     "/grpc.test.FooService/BarMethod"))),
-        grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
+        grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                 grpc_slice_intern(grpc_slice_from_static_string(
                                     "foo.test.google.fr:1234"))),
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_GRPC_TRACE_BIN,
+            GRPC_MDSTR_GRPC_TRACE_BIN,
             grpc_slice_from_static_string("\x00\x01\x02\x03\x04\x05\x06\x07\x08"
                                           "\x09\x0a\x0b\x0c\x0d\x0e\x0f"
                                           "\x10\x11\x12\x13\x14\x15\x16\x17\x18"
@@ -303,7 +297,7 @@
                                           "\x29\x2a\x2b\x2c\x2d\x2e\x2f"
                                           "\x30")),
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_GRPC_TAGS_BIN,
+            GRPC_MDSTR_GRPC_TAGS_BIN,
             grpc_slice_from_static_string("\x00\x01\x02\x03\x04\x05\x06\x07\x08"
                                           "\x09\x0a\x0b\x0c\x0d\x0e\x0f"
                                           "\x10\x11\x12\x13")),
@@ -311,7 +305,7 @@
         GRPC_MDELEM_TE_TRAILERS,
         GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_USER_AGENT,
+            GRPC_MDSTR_USER_AGENT,
             grpc_slice_intern(grpc_slice_from_static_string(
                 "grpc-c/3.0.0-dev (linux; chttp2; green)")))};
   }
@@ -320,7 +314,7 @@
 class RepresentativeServerInitialMetadata {
  public:
   static constexpr bool kEnableTrueBinary = true;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {GRPC_MDELEM_STATUS_200,
             GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
             GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP};
@@ -330,7 +324,7 @@
 class RepresentativeServerTrailingMetadata {
  public:
   static constexpr bool kEnableTrueBinary = true;
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {GRPC_MDELEM_GRPC_STATUS_0};
   }
 };
@@ -431,48 +425,45 @@
 
 static void BM_HpackParserInitDestroy(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_chttp2_hpack_parser p;
   while (state.KeepRunning()) {
-    grpc_chttp2_hpack_parser_init(&exec_ctx, &p);
-    grpc_chttp2_hpack_parser_destroy(&exec_ctx, &p);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_chttp2_hpack_parser_init(&p);
+    grpc_chttp2_hpack_parser_destroy(&p);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_HpackParserInitDestroy);
 
-static void UnrefHeader(grpc_exec_ctx* exec_ctx, void* user_data,
-                        grpc_mdelem md) {
-  GRPC_MDELEM_UNREF(exec_ctx, md);
+static void UnrefHeader(void* user_data, grpc_mdelem md) {
+  GRPC_MDELEM_UNREF(md);
 }
 
-template <class Fixture, void (*OnHeader)(grpc_exec_ctx*, void*, grpc_mdelem)>
+template <class Fixture, void (*OnHeader)(void*, grpc_mdelem)>
 static void BM_HpackParserParseHeader(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   std::vector<grpc_slice> init_slices = Fixture::GetInitSlices();
   std::vector<grpc_slice> benchmark_slices = Fixture::GetBenchmarkSlices();
   grpc_chttp2_hpack_parser p;
-  grpc_chttp2_hpack_parser_init(&exec_ctx, &p);
+  grpc_chttp2_hpack_parser_init(&p);
   p.on_header = OnHeader;
   p.on_header_user_data = nullptr;
   for (auto slice : init_slices) {
-    GPR_ASSERT(GRPC_ERROR_NONE ==
-               grpc_chttp2_hpack_parser_parse(&exec_ctx, &p, slice));
+    GPR_ASSERT(GRPC_ERROR_NONE == grpc_chttp2_hpack_parser_parse(&p, slice));
   }
   while (state.KeepRunning()) {
     for (auto slice : benchmark_slices) {
-      GPR_ASSERT(GRPC_ERROR_NONE ==
-                 grpc_chttp2_hpack_parser_parse(&exec_ctx, &p, slice));
+      GPR_ASSERT(GRPC_ERROR_NONE == grpc_chttp2_hpack_parser_parse(&p, slice));
     }
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
   for (auto slice : init_slices) grpc_slice_unref(slice);
   for (auto slice : benchmark_slices) grpc_slice_unref(slice);
-  grpc_chttp2_hpack_parser_destroy(&exec_ctx, &p);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_chttp2_hpack_parser_destroy(&p);
+
   track_counters.Finish(state);
 }
 
@@ -769,8 +760,7 @@
 static void free_timeout(void* p) { gpr_free(p); }
 
 // New implementation.
-static void OnHeaderNew(grpc_exec_ctx* exec_ctx, void* user_data,
-                        grpc_mdelem md) {
+static void OnHeaderNew(void* user_data, grpc_mdelem md) {
   if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_GRPC_TIMEOUT)) {
     grpc_millis* cached_timeout =
         static_cast<grpc_millis*>(grpc_mdelem_get_user_data(md, free_timeout));
@@ -793,7 +783,7 @@
       }
     }
     benchmark::DoNotOptimize(timeout);
-    GRPC_MDELEM_UNREF(exec_ctx, md);
+    GRPC_MDELEM_UNREF(md);
   } else {
     GPR_ASSERT(0);
   }
diff --git a/test/cpp/microbenchmarks/bm_chttp2_transport.cc b/test/cpp/microbenchmarks/bm_chttp2_transport.cc
index b95ee0c..fcb1677 100644
--- a/test/cpp/microbenchmarks/bm_chttp2_transport.cc
+++ b/test/cpp/microbenchmarks/bm_chttp2_transport.cc
@@ -58,7 +58,7 @@
     ru_ = grpc_resource_user_create(Library::get().rq(), "dummy_endpoint");
   }
 
-  void PushInput(grpc_exec_ctx* exec_ctx, grpc_slice slice) {
+  void PushInput(grpc_slice slice) {
     if (read_cb_ == nullptr) {
       GPR_ASSERT(!have_slice_);
       buffered_slice_ = slice;
@@ -66,7 +66,7 @@
       return;
     }
     grpc_slice_buffer_add(slices_, slice);
-    GRPC_CLOSURE_SCHED(exec_ctx, read_cb_, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(read_cb_, GRPC_ERROR_NONE);
     read_cb_ = nullptr;
   }
 
@@ -77,50 +77,45 @@
   bool have_slice_ = false;
   grpc_slice buffered_slice_;
 
-  void QueueRead(grpc_exec_ctx* exec_ctx, grpc_slice_buffer* slices,
-                 grpc_closure* cb) {
+  void QueueRead(grpc_slice_buffer* slices, grpc_closure* cb) {
     GPR_ASSERT(read_cb_ == nullptr);
     if (have_slice_) {
       have_slice_ = false;
       grpc_slice_buffer_add(slices, buffered_slice_);
-      GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
       return;
     }
     read_cb_ = cb;
     slices_ = slices;
   }
 
-  static void read(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                   grpc_slice_buffer* slices, grpc_closure* cb) {
-    static_cast<DummyEndpoint*>(ep)->QueueRead(exec_ctx, slices, cb);
+  static void read(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                   grpc_closure* cb) {
+    static_cast<DummyEndpoint*>(ep)->QueueRead(slices, cb);
   }
 
-  static void write(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                    grpc_slice_buffer* slices, grpc_closure* cb) {
-    GRPC_CLOSURE_SCHED(exec_ctx, cb, GRPC_ERROR_NONE);
+  static void write(grpc_endpoint* ep, grpc_slice_buffer* slices,
+                    grpc_closure* cb) {
+    GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
   }
 
   static grpc_workqueue* get_workqueue(grpc_endpoint* ep) { return nullptr; }
 
-  static void add_to_pollset(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                             grpc_pollset* pollset) {}
+  static void add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {}
 
-  static void add_to_pollset_set(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                                 grpc_pollset_set* pollset) {}
-
-  static void delete_from_pollset_set(grpc_exec_ctx* exec_ctx,
-                                      grpc_endpoint* ep,
-                                      grpc_pollset_set* pollset) {}
-
-  static void shutdown(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep,
-                       grpc_error* why) {
-    grpc_resource_user_shutdown(exec_ctx, static_cast<DummyEndpoint*>(ep)->ru_);
-    GRPC_CLOSURE_SCHED(exec_ctx, static_cast<DummyEndpoint*>(ep)->read_cb_,
-                       why);
+  static void add_to_pollset_set(grpc_endpoint* ep, grpc_pollset_set* pollset) {
   }
 
-  static void destroy(grpc_exec_ctx* exec_ctx, grpc_endpoint* ep) {
-    grpc_resource_user_unref(exec_ctx, static_cast<DummyEndpoint*>(ep)->ru_);
+  static void delete_from_pollset_set(grpc_endpoint* ep,
+                                      grpc_pollset_set* pollset) {}
+
+  static void shutdown(grpc_endpoint* ep, grpc_error* why) {
+    grpc_resource_user_shutdown(static_cast<DummyEndpoint*>(ep)->ru_);
+    GRPC_CLOSURE_SCHED(static_cast<DummyEndpoint*>(ep)->read_cb_, why);
+  }
+
+  static void destroy(grpc_endpoint* ep) {
+    grpc_resource_user_unref(static_cast<DummyEndpoint*>(ep)->ru_);
     delete static_cast<DummyEndpoint*>(ep);
   }
 
@@ -136,29 +131,24 @@
   Fixture(const grpc::ChannelArguments& args, bool client) {
     grpc_channel_args c_args = args.c_channel_args();
     ep_ = new DummyEndpoint;
-    t_ = grpc_create_chttp2_transport(exec_ctx(), &c_args, ep_, client);
-    grpc_chttp2_transport_start_reading(exec_ctx(), t_, nullptr);
+    t_ = grpc_create_chttp2_transport(&c_args, ep_, client);
+    grpc_chttp2_transport_start_reading(t_, nullptr, nullptr);
     FlushExecCtx();
   }
 
-  void FlushExecCtx() { grpc_exec_ctx_flush(&exec_ctx_); }
+  void FlushExecCtx() { grpc_core::ExecCtx::Get()->Flush(); }
 
-  ~Fixture() {
-    grpc_transport_destroy(&exec_ctx_, t_);
-    grpc_exec_ctx_finish(&exec_ctx_);
-  }
+  ~Fixture() { grpc_transport_destroy(t_); }
 
   grpc_chttp2_transport* chttp2_transport() {
     return reinterpret_cast<grpc_chttp2_transport*>(t_);
   }
   grpc_transport* transport() { return t_; }
-  grpc_exec_ctx* exec_ctx() { return &exec_ctx_; }
 
-  void PushInput(grpc_slice slice) { ep_->PushInput(exec_ctx(), slice); }
+  void PushInput(grpc_slice slice) { ep_->PushInput(slice); }
 
  private:
   DummyEndpoint* ep_;
-  grpc_exec_ctx exec_ctx_ = GRPC_EXEC_CTX_INIT;
   grpc_transport* t_;
 };
 
@@ -175,8 +165,8 @@
       GRPC_CLOSURE_INIT(this, Execute, this, sched);
     }
     F f_;
-    static void Execute(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-      static_cast<C*>(arg)->f_(exec_ctx, error);
+    static void Execute(void* arg, grpc_error* error) {
+      static_cast<C*>(arg)->f_(error);
     }
   };
   return std::unique_ptr<Closure>(new C(f, sched));
@@ -188,8 +178,8 @@
   struct C : public grpc_closure {
     C(const F& f) : f_(f) {}
     F f_;
-    static void Execute(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
-      static_cast<C*>(arg)->f_(exec_ctx, error);
+    static void Execute(void* arg, grpc_error* error) {
+      static_cast<C*>(arg)->f_(error);
       delete static_cast<C*>(arg);
     }
   };
@@ -220,22 +210,22 @@
       gpr_arena_destroy(arena_);
       arena_ = gpr_arena_create(4096);
     }
-    grpc_transport_init_stream(f_->exec_ctx(), f_->transport(),
+    grpc_transport_init_stream(f_->transport(),
                                static_cast<grpc_stream*>(stream_), &refcount_,
                                nullptr, arena_);
   }
 
-  void DestroyThen(grpc_exec_ctx* exec_ctx, grpc_closure* closure) {
+  void DestroyThen(grpc_closure* closure) {
     destroy_closure_ = closure;
 #ifndef NDEBUG
-    grpc_stream_unref(exec_ctx, &refcount_, "DestroyThen");
+    grpc_stream_unref(&refcount_, "DestroyThen");
 #else
-    grpc_stream_unref(exec_ctx, &refcount_);
+    grpc_stream_unref(&refcount_);
 #endif
   }
 
-  void Op(grpc_exec_ctx* exec_ctx, grpc_transport_stream_op_batch* op) {
-    grpc_transport_perform_stream_op(exec_ctx, f_->transport(),
+  void Op(grpc_transport_stream_op_batch* op) {
+    grpc_transport_perform_stream_op(f_->transport(),
                                      static_cast<grpc_stream*>(stream_), op);
   }
 
@@ -244,10 +234,9 @@
   }
 
  private:
-  static void FinishDestroy(grpc_exec_ctx* exec_ctx, void* arg,
-                            grpc_error* error) {
+  static void FinishDestroy(void* arg, grpc_error* error) {
     auto stream = static_cast<Stream*>(arg);
-    grpc_transport_destroy_stream(exec_ctx, stream->f_->transport(),
+    grpc_transport_destroy_stream(stream->f_->transport(),
                                   static_cast<grpc_stream*>(stream->stream_),
                                   stream->destroy_closure_);
     gpr_event_set(&stream->done_, (void*)1);
@@ -268,6 +257,7 @@
 
 static void BM_StreamCreateDestroy(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   Stream s(&f);
   grpc_transport_stream_op_batch op;
@@ -276,14 +266,13 @@
   op.cancel_stream = true;
   op.payload = &op_payload;
   op_payload.cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-  std::unique_ptr<Closure> next =
-      MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-        if (!state.KeepRunning()) return;
-        s.Init(state);
-        s.Op(exec_ctx, &op);
-        s.DestroyThen(exec_ctx, next.get());
-      });
-  GRPC_CLOSURE_RUN(f.exec_ctx(), next.get(), GRPC_ERROR_NONE);
+  std::unique_ptr<Closure> next = MakeClosure([&](grpc_error* error) {
+    if (!state.KeepRunning()) return;
+    s.Init(state);
+    s.Op(&op);
+    s.DestroyThen(next.get());
+  });
+  GRPC_CLOSURE_RUN(next.get(), GRPC_ERROR_NONE);
   f.FlushExecCtx();
   track_counters.Finish(state);
 }
@@ -291,21 +280,21 @@
 
 class RepresentativeClientInitialMetadata {
  public:
-  static std::vector<grpc_mdelem> GetElems(grpc_exec_ctx* exec_ctx) {
+  static std::vector<grpc_mdelem> GetElems() {
     return {
         GRPC_MDELEM_SCHEME_HTTP,
         GRPC_MDELEM_METHOD_POST,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_PATH,
+            GRPC_MDSTR_PATH,
             grpc_slice_intern(grpc_slice_from_static_string("/foo/bar"))),
-        grpc_mdelem_from_slices(exec_ctx, GRPC_MDSTR_AUTHORITY,
+        grpc_mdelem_from_slices(GRPC_MDSTR_AUTHORITY,
                                 grpc_slice_intern(grpc_slice_from_static_string(
                                     "foo.test.google.fr:1234"))),
         GRPC_MDELEM_GRPC_ACCEPT_ENCODING_IDENTITY_COMMA_DEFLATE_COMMA_GZIP,
         GRPC_MDELEM_TE_TRAILERS,
         GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC,
         grpc_mdelem_from_slices(
-            exec_ctx, GRPC_MDSTR_USER_AGENT,
+            GRPC_MDSTR_USER_AGENT,
             grpc_slice_intern(grpc_slice_from_static_string(
                 "grpc-c/3.0.0-dev (linux; chttp2; green)")))};
   }
@@ -314,6 +303,7 @@
 template <class Metadata>
 static void BM_StreamCreateSendInitialMetadataDestroy(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   Stream s(&f);
   grpc_transport_stream_op_batch op;
@@ -330,34 +320,33 @@
   grpc_metadata_batch b;
   grpc_metadata_batch_init(&b);
   b.deadline = GRPC_MILLIS_INF_FUTURE;
-  std::vector<grpc_mdelem> elems = Metadata::GetElems(f.exec_ctx());
+  std::vector<grpc_mdelem> elems = Metadata::GetElems();
   std::vector<grpc_linked_mdelem> storage(elems.size());
   for (size_t i = 0; i < elems.size(); i++) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "addmd",
-        grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
+        "addmd", grpc_metadata_batch_add_tail(&b, &storage[i], elems[i])));
   }
 
   f.FlushExecCtx();
-  start = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
+  start = MakeClosure([&](grpc_error* error) {
     if (!state.KeepRunning()) return;
     s.Init(state);
     reset_op();
     op.on_complete = done.get();
     op.send_initial_metadata = true;
     op.payload->send_initial_metadata.send_initial_metadata = &b;
-    s.Op(exec_ctx, &op);
+    s.Op(&op);
   });
-  done = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
+  done = MakeClosure([&](grpc_error* error) {
     reset_op();
     op.cancel_stream = true;
     op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-    s.Op(exec_ctx, &op);
-    s.DestroyThen(exec_ctx, start.get());
+    s.Op(&op);
+    s.DestroyThen(start.get());
   });
-  GRPC_CLOSURE_SCHED(f.exec_ctx(), start.get(), GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(start.get(), GRPC_ERROR_NONE);
   f.FlushExecCtx();
-  grpc_metadata_batch_destroy(f.exec_ctx(), &b);
+  grpc_metadata_batch_destroy(&b);
   track_counters.Finish(state);
 }
 BENCHMARK_TEMPLATE(BM_StreamCreateSendInitialMetadataDestroy,
@@ -365,6 +354,7 @@
 
 static void BM_TransportEmptyOp(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   Stream s(&f);
   s.Init(state);
@@ -375,21 +365,19 @@
     memset(&op, 0, sizeof(op));
     op.payload = &op_payload;
   };
-  std::unique_ptr<Closure> c =
-      MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-        if (!state.KeepRunning()) return;
-        reset_op();
-        op.on_complete = c.get();
-        s.Op(exec_ctx, &op);
-      });
-  GRPC_CLOSURE_SCHED(f.exec_ctx(), c.get(), GRPC_ERROR_NONE);
+  std::unique_ptr<Closure> c = MakeClosure([&](grpc_error* error) {
+    if (!state.KeepRunning()) return;
+    reset_op();
+    op.on_complete = c.get();
+    s.Op(&op);
+  });
+  GRPC_CLOSURE_SCHED(c.get(), GRPC_ERROR_NONE);
   f.FlushExecCtx();
   reset_op();
   op.cancel_stream = true;
   op_payload.cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-  s.Op(f.exec_ctx(), &op);
-  s.DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx* exec_ctx,
-                                                 grpc_error* error) {}));
+  s.Op(&op);
+  s.DestroyThen(MakeOnceClosure([](grpc_error* error) {}));
   f.FlushExecCtx();
   track_counters.Finish(state);
 }
@@ -399,6 +387,7 @@
 
 static void BM_TransportStreamSend(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   auto s = std::unique_ptr<Stream>(new Stream(&f));
   s->Init(state);
@@ -420,39 +409,37 @@
   grpc_metadata_batch_init(&b);
   b.deadline = GRPC_MILLIS_INF_FUTURE;
   std::vector<grpc_mdelem> elems =
-      RepresentativeClientInitialMetadata::GetElems(f.exec_ctx());
+      RepresentativeClientInitialMetadata::GetElems();
   std::vector<grpc_linked_mdelem> storage(elems.size());
   for (size_t i = 0; i < elems.size(); i++) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "addmd",
-        grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
+        "addmd", grpc_metadata_batch_add_tail(&b, &storage[i], elems[i])));
   }
 
   gpr_event* bm_done = new gpr_event;
   gpr_event_init(bm_done);
 
-  std::unique_ptr<Closure> c =
-      MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-        if (!state.KeepRunning()) {
-          gpr_event_set(bm_done, (void*)1);
-          return;
-        }
-        // force outgoing window to be yuge
-        s->chttp2_stream()->flow_control->TestOnlyForceHugeWindow();
-        f.chttp2_transport()->flow_control->TestOnlyForceHugeWindow();
-        grpc_slice_buffer_stream_init(&send_stream, &send_buffer, 0);
-        reset_op();
-        op.on_complete = c.get();
-        op.send_message = true;
-        op.payload->send_message.send_message = &send_stream.base;
-        s->Op(exec_ctx, &op);
-      });
+  std::unique_ptr<Closure> c = MakeClosure([&](grpc_error* error) {
+    if (!state.KeepRunning()) {
+      gpr_event_set(bm_done, (void*)1);
+      return;
+    }
+    // force outgoing window to be yuge
+    s->chttp2_stream()->flow_control->TestOnlyForceHugeWindow();
+    f.chttp2_transport()->flow_control->TestOnlyForceHugeWindow();
+    grpc_slice_buffer_stream_init(&send_stream, &send_buffer, 0);
+    reset_op();
+    op.on_complete = c.get();
+    op.send_message = true;
+    op.payload->send_message.send_message = &send_stream.base;
+    s->Op(&op);
+  });
 
   reset_op();
   op.send_initial_metadata = true;
   op.payload->send_initial_metadata.send_initial_metadata = &b;
   op.on_complete = c.get();
-  s->Op(f.exec_ctx(), &op);
+  s->Op(&op);
 
   f.FlushExecCtx();
   gpr_event_wait(bm_done, gpr_inf_future(GPR_CLOCK_REALTIME));
@@ -461,13 +448,12 @@
   reset_op();
   op.cancel_stream = true;
   op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-  s->Op(f.exec_ctx(), &op);
-  s->DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx* exec_ctx,
-                                                  grpc_error* error) {}));
+  s->Op(&op);
+  s->DestroyThen(MakeOnceClosure([](grpc_error* error) {}));
   f.FlushExecCtx();
   s.reset();
   track_counters.Finish(state);
-  grpc_metadata_batch_destroy(f.exec_ctx(), &b);
+  grpc_metadata_batch_destroy(&b);
   grpc_slice_buffer_destroy(&send_buffer);
 }
 BENCHMARK(BM_TransportStreamSend)->Range(0, 128 * 1024 * 1024);
@@ -531,6 +517,7 @@
 
 static void BM_TransportStreamRecv(benchmark::State& state) {
   TrackCounters track_counters;
+  grpc_core::ExecCtx exec_ctx;
   Fixture f(grpc::ChannelArguments(), true);
   Stream s(&f);
   s.Init(state);
@@ -551,16 +538,14 @@
   grpc_metadata_batch_init(&b_recv);
   b.deadline = GRPC_MILLIS_INF_FUTURE;
   std::vector<grpc_mdelem> elems =
-      RepresentativeClientInitialMetadata::GetElems(f.exec_ctx());
+      RepresentativeClientInitialMetadata::GetElems();
   std::vector<grpc_linked_mdelem> storage(elems.size());
   for (size_t i = 0; i < elems.size(); i++) {
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
-        "addmd",
-        grpc_metadata_batch_add_tail(f.exec_ctx(), &b, &storage[i], elems[i])));
+        "addmd", grpc_metadata_batch_add_tail(&b, &storage[i], elems[i])));
   }
 
-  std::unique_ptr<Closure> do_nothing =
-      MakeClosure([](grpc_exec_ctx* exec_ctx, grpc_error* error) {});
+  std::unique_ptr<Closure> do_nothing = MakeClosure([](grpc_error* error) {});
 
   uint32_t received;
 
@@ -569,51 +554,49 @@
   std::unique_ptr<Closure> drain_continue;
   grpc_slice recv_slice;
 
-  std::unique_ptr<Closure> c =
-      MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-        if (!state.KeepRunning()) return;
-        // force outgoing window to be yuge
-        s.chttp2_stream()->flow_control->TestOnlyForceHugeWindow();
-        f.chttp2_transport()->flow_control->TestOnlyForceHugeWindow();
-        received = 0;
-        reset_op();
-        op.on_complete = do_nothing.get();
-        op.recv_message = true;
-        op.payload->recv_message.recv_message = &recv_stream;
-        op.payload->recv_message.recv_message_ready = drain_start.get();
-        s.Op(exec_ctx, &op);
-        f.PushInput(grpc_slice_ref(incoming_data));
-      });
+  std::unique_ptr<Closure> c = MakeClosure([&](grpc_error* error) {
+    if (!state.KeepRunning()) return;
+    // force outgoing window to be yuge
+    s.chttp2_stream()->flow_control->TestOnlyForceHugeWindow();
+    f.chttp2_transport()->flow_control->TestOnlyForceHugeWindow();
+    received = 0;
+    reset_op();
+    op.on_complete = do_nothing.get();
+    op.recv_message = true;
+    op.payload->recv_message.recv_message = &recv_stream;
+    op.payload->recv_message.recv_message_ready = drain_start.get();
+    s.Op(&op);
+    f.PushInput(grpc_slice_ref(incoming_data));
+  });
 
-  drain_start = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
+  drain_start = MakeClosure([&](grpc_error* error) {
     if (recv_stream == nullptr) {
       GPR_ASSERT(!state.KeepRunning());
       return;
     }
-    GRPC_CLOSURE_RUN(exec_ctx, drain.get(), GRPC_ERROR_NONE);
+    GRPC_CLOSURE_RUN(drain.get(), GRPC_ERROR_NONE);
   });
 
-  drain = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
+  drain = MakeClosure([&](grpc_error* error) {
     do {
       if (received == recv_stream->length) {
-        grpc_byte_stream_destroy(exec_ctx, recv_stream);
-        GRPC_CLOSURE_SCHED(exec_ctx, c.get(), GRPC_ERROR_NONE);
+        grpc_byte_stream_destroy(recv_stream);
+        GRPC_CLOSURE_SCHED(c.get(), GRPC_ERROR_NONE);
         return;
       }
-    } while (grpc_byte_stream_next(exec_ctx, recv_stream,
-                                   recv_stream->length - received,
+    } while (grpc_byte_stream_next(recv_stream, recv_stream->length - received,
                                    drain_continue.get()) &&
              GRPC_ERROR_NONE ==
-                 grpc_byte_stream_pull(exec_ctx, recv_stream, &recv_slice) &&
+                 grpc_byte_stream_pull(recv_stream, &recv_slice) &&
              (received += GRPC_SLICE_LENGTH(recv_slice),
-              grpc_slice_unref_internal(exec_ctx, recv_slice), true));
+              grpc_slice_unref_internal(recv_slice), true));
   });
 
-  drain_continue = MakeClosure([&](grpc_exec_ctx* exec_ctx, grpc_error* error) {
-    grpc_byte_stream_pull(exec_ctx, recv_stream, &recv_slice);
+  drain_continue = MakeClosure([&](grpc_error* error) {
+    grpc_byte_stream_pull(recv_stream, &recv_slice);
     received += GRPC_SLICE_LENGTH(recv_slice);
-    grpc_slice_unref_internal(exec_ctx, recv_slice);
-    GRPC_CLOSURE_RUN(exec_ctx, drain.get(), GRPC_ERROR_NONE);
+    grpc_slice_unref_internal(recv_slice);
+    GRPC_CLOSURE_RUN(drain.get(), GRPC_ERROR_NONE);
   });
 
   reset_op();
@@ -624,7 +607,7 @@
   op.payload->recv_initial_metadata.recv_initial_metadata_ready =
       do_nothing.get();
   op.on_complete = c.get();
-  s.Op(f.exec_ctx(), &op);
+  s.Op(&op);
   f.PushInput(SLICE_FROM_BUFFER(
       "\x00\x00\x00\x04\x00\x00\x00\x00\x00"
       // Generated using:
@@ -642,13 +625,12 @@
   reset_op();
   op.cancel_stream = true;
   op.payload->cancel_stream.cancel_error = GRPC_ERROR_CANCELLED;
-  s.Op(f.exec_ctx(), &op);
-  s.DestroyThen(f.exec_ctx(), MakeOnceClosure([](grpc_exec_ctx* exec_ctx,
-                                                 grpc_error* error) {}));
+  s.Op(&op);
+  s.DestroyThen(MakeOnceClosure([](grpc_error* error) {}));
   f.FlushExecCtx();
   track_counters.Finish(state);
-  grpc_metadata_batch_destroy(f.exec_ctx(), &b);
-  grpc_metadata_batch_destroy(f.exec_ctx(), &b_recv);
+  grpc_metadata_batch_destroy(&b);
+  grpc_metadata_batch_destroy(&b_recv);
   grpc_slice_unref(incoming_data);
 }
 BENCHMARK(BM_TransportStreamRecv)->Range(0, 128 * 1024 * 1024);
diff --git a/test/cpp/microbenchmarks/bm_closure.cc b/test/cpp/microbenchmarks/bm_closure.cc
index 2434d4e..4d5a82c 100644
--- a/test/cpp/microbenchmarks/bm_closure.cc
+++ b/test/cpp/microbenchmarks/bm_closure.cc
@@ -34,8 +34,7 @@
 static void BM_NoOpExecCtx(benchmark::State& state) {
   TrackCounters track_counters;
   while (state.KeepRunning()) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_core::ExecCtx exec_ctx;
   }
   track_counters.Finish(state);
 }
@@ -43,16 +42,16 @@
 
 static void BM_WellFlushed(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_WellFlushed);
 
-static void DoNothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+static void DoNothing(void* arg, grpc_error* error) {}
 
 static void BM_ClosureInitAgainstExecCtx(benchmark::State& state) {
   TrackCounters track_counters;
@@ -69,13 +68,13 @@
   TrackCounters track_counters;
   grpc_combiner* combiner = grpc_combiner_create();
   grpc_closure c;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     benchmark::DoNotOptimize(GRPC_CLOSURE_INIT(
         &c, DoNothing, nullptr, grpc_combiner_scheduler(combiner)));
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureInitAgainstCombiner);
@@ -84,41 +83,39 @@
   TrackCounters track_counters;
   grpc_closure c;
   GRPC_CLOSURE_INIT(&c, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_RUN(&exec_ctx, &c, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_RUN(&c, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureRunOnExecCtx);
 
 static void BM_ClosureCreateAndRun(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     GRPC_CLOSURE_RUN(
-        &exec_ctx,
         GRPC_CLOSURE_CREATE(DoNothing, nullptr, grpc_schedule_on_exec_ctx),
         GRPC_ERROR_NONE);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureCreateAndRun);
 
 static void BM_ClosureInitAndRun(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure c;
   while (state.KeepRunning()) {
     GRPC_CLOSURE_RUN(
-        &exec_ctx,
         GRPC_CLOSURE_INIT(&c, DoNothing, nullptr, grpc_schedule_on_exec_ctx),
         GRPC_ERROR_NONE);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureInitAndRun);
@@ -127,12 +124,12 @@
   TrackCounters track_counters;
   grpc_closure c;
   GRPC_CLOSURE_INIT(&c, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSchedOnExecCtx);
@@ -143,13 +140,13 @@
   grpc_closure c2;
   GRPC_CLOSURE_INIT(&c1, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched2OnExecCtx);
@@ -162,14 +159,14 @@
   GRPC_CLOSURE_INIT(&c1, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
   GRPC_CLOSURE_INIT(&c3, DoNothing, nullptr, grpc_schedule_on_exec_ctx);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c3, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c3, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched3OnExecCtx);
@@ -179,13 +176,13 @@
   // for comparison with the combiner stuff below
   gpr_mu mu;
   gpr_mu_init(&mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     gpr_mu_lock(&mu);
-    DoNothing(&exec_ctx, nullptr, GRPC_ERROR_NONE);
+    DoNothing(nullptr, GRPC_ERROR_NONE);
     gpr_mu_unlock(&mu);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_AcquireMutex);
@@ -195,16 +192,16 @@
   // for comparison with the combiner stuff below
   gpr_mu mu;
   gpr_mu_init(&mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     if (gpr_mu_trylock(&mu)) {
-      DoNothing(&exec_ctx, nullptr, GRPC_ERROR_NONE);
+      DoNothing(nullptr, GRPC_ERROR_NONE);
       gpr_mu_unlock(&mu);
     } else {
       abort();
     }
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_TryAcquireMutex);
@@ -213,13 +210,13 @@
   TrackCounters track_counters;
   // for comparison with the combiner stuff below
   gpr_spinlock mu = GPR_SPINLOCK_INITIALIZER;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     gpr_spinlock_lock(&mu);
-    DoNothing(&exec_ctx, nullptr, GRPC_ERROR_NONE);
+    DoNothing(nullptr, GRPC_ERROR_NONE);
     gpr_spinlock_unlock(&mu);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_AcquireSpinlock);
@@ -228,16 +225,16 @@
   TrackCounters track_counters;
   // for comparison with the combiner stuff below
   gpr_spinlock mu = GPR_SPINLOCK_INITIALIZER;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     if (gpr_spinlock_trylock(&mu)) {
-      DoNothing(&exec_ctx, nullptr, GRPC_ERROR_NONE);
+      DoNothing(nullptr, GRPC_ERROR_NONE);
       gpr_spinlock_unlock(&mu);
     } else {
       abort();
     }
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_TryAcquireSpinlock);
@@ -247,13 +244,13 @@
   grpc_combiner* combiner = grpc_combiner_create();
   grpc_closure c;
   GRPC_CLOSURE_INIT(&c, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSchedOnCombiner);
@@ -265,14 +262,14 @@
   grpc_closure c2;
   GRPC_CLOSURE_INIT(&c1, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched2OnCombiner);
@@ -286,15 +283,15 @@
   GRPC_CLOSURE_INIT(&c1, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
   GRPC_CLOSURE_INIT(&c3, DoNothing, nullptr, grpc_combiner_scheduler(combiner));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c3, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c3, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched3OnCombiner);
@@ -309,15 +306,15 @@
                     grpc_combiner_scheduler(combiner1));
   GRPC_CLOSURE_INIT(&c2, DoNothing, nullptr,
                     grpc_combiner_scheduler(combiner2));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner1, "finished");
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner2, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner1, "finished");
+  GRPC_COMBINER_UNREF(combiner2, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched2OnTwoCombiners);
@@ -338,17 +335,17 @@
                     grpc_combiner_scheduler(combiner1));
   GRPC_CLOSURE_INIT(&c4, DoNothing, nullptr,
                     grpc_combiner_scheduler(combiner2));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c1, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c2, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c3, GRPC_ERROR_NONE);
-    GRPC_CLOSURE_SCHED(&exec_ctx, &c4, GRPC_ERROR_NONE);
-    grpc_exec_ctx_flush(&exec_ctx);
+    GRPC_CLOSURE_SCHED(&c1, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c2, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c3, GRPC_ERROR_NONE);
+    GRPC_CLOSURE_SCHED(&c4, GRPC_ERROR_NONE);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner1, "finished");
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner2, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_COMBINER_UNREF(combiner1, "finished");
+  GRPC_COMBINER_UNREF(combiner2, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureSched4OnTwoCombiners);
@@ -362,13 +359,11 @@
     GRPC_CLOSURE_INIT(&closure_, Step, this, scheduler);
   }
 
-  void ScheduleFirst(grpc_exec_ctx* exec_ctx) {
-    GRPC_CLOSURE_SCHED(exec_ctx, &closure_, GRPC_ERROR_NONE);
-  }
+  void ScheduleFirst() { GRPC_CLOSURE_SCHED(&closure_, GRPC_ERROR_NONE); }
 
   void ScheduleFirstAgainstDifferentScheduler(
-      grpc_exec_ctx* exec_ctx, grpc_closure_scheduler* scheduler) {
-    GRPC_CLOSURE_SCHED(exec_ctx, GRPC_CLOSURE_CREATE(Step, this, scheduler),
+      grpc_closure_scheduler* scheduler) {
+    GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(Step, this, scheduler),
                        GRPC_ERROR_NONE);
   }
 
@@ -376,47 +371,46 @@
   benchmark::State& state_;
   grpc_closure closure_;
 
-  static void Step(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+  static void Step(void* arg, grpc_error* error) {
     Rescheduler* self = static_cast<Rescheduler*>(arg);
     if (self->state_.KeepRunning()) {
-      GRPC_CLOSURE_SCHED(exec_ctx, &self->closure_, GRPC_ERROR_NONE);
+      GRPC_CLOSURE_SCHED(&self->closure_, GRPC_ERROR_NONE);
     }
   }
 };
 
 static void BM_ClosureReschedOnExecCtx(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   Rescheduler r(state, grpc_schedule_on_exec_ctx);
-  r.ScheduleFirst(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  r.ScheduleFirst();
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureReschedOnExecCtx);
 
 static void BM_ClosureReschedOnCombiner(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_combiner* combiner = grpc_combiner_create();
   Rescheduler r(state, grpc_combiner_scheduler(combiner));
-  r.ScheduleFirst(&exec_ctx);
-  grpc_exec_ctx_flush(&exec_ctx);
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  r.ScheduleFirst();
+  grpc_core::ExecCtx::Get()->Flush();
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureReschedOnCombiner);
 
 static void BM_ClosureReschedOnCombinerFinally(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_combiner* combiner = grpc_combiner_create();
   Rescheduler r(state, grpc_combiner_finally_scheduler(combiner));
-  r.ScheduleFirstAgainstDifferentScheduler(&exec_ctx,
-                                           grpc_combiner_scheduler(combiner));
-  grpc_exec_ctx_flush(&exec_ctx);
-  GRPC_COMBINER_UNREF(&exec_ctx, combiner, "finished");
-  grpc_exec_ctx_finish(&exec_ctx);
+  r.ScheduleFirstAgainstDifferentScheduler(grpc_combiner_scheduler(combiner));
+  grpc_core::ExecCtx::Get()->Flush();
+  GRPC_COMBINER_UNREF(combiner, "finished");
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_ClosureReschedOnCombinerFinally);
diff --git a/test/cpp/microbenchmarks/bm_cq.cc b/test/cpp/microbenchmarks/bm_cq.cc
index f0dede7..9724259 100644
--- a/test/cpp/microbenchmarks/bm_cq.cc
+++ b/test/cpp/microbenchmarks/bm_cq.cc
@@ -66,7 +66,7 @@
 }
 BENCHMARK(BM_CreateDestroyCore);
 
-static void DoneWithCompletionOnStack(grpc_exec_ctx* exec_ctx, void* arg,
+static void DoneWithCompletionOnStack(void* arg,
                                       grpc_cq_completion* completion) {}
 
 class DummyTag final : public internal::CompletionQueueTag {
@@ -81,11 +81,11 @@
   while (state.KeepRunning()) {
     grpc_cq_completion completion;
     DummyTag dummy_tag;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(grpc_cq_begin_op(c_cq, &dummy_tag));
-    grpc_cq_end_op(&exec_ctx, c_cq, &dummy_tag, GRPC_ERROR_NONE,
-                   DoneWithCompletionOnStack, nullptr, &completion);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_cq_end_op(c_cq, &dummy_tag, GRPC_ERROR_NONE, DoneWithCompletionOnStack,
+                   nullptr, &completion);
+
     void* tag;
     bool ok;
     cq.Next(&tag, &ok);
@@ -101,11 +101,11 @@
   gpr_timespec deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
   while (state.KeepRunning()) {
     grpc_cq_completion completion;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(grpc_cq_begin_op(cq, nullptr));
-    grpc_cq_end_op(&exec_ctx, cq, nullptr, GRPC_ERROR_NONE,
-                   DoneWithCompletionOnStack, nullptr, &completion);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_cq_end_op(cq, nullptr, GRPC_ERROR_NONE, DoneWithCompletionOnStack,
+                   nullptr, &completion);
+
     grpc_completion_queue_next(cq, deadline, nullptr);
   }
   grpc_completion_queue_destroy(cq);
@@ -120,11 +120,11 @@
   gpr_timespec deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
   while (state.KeepRunning()) {
     grpc_cq_completion completion;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     GPR_ASSERT(grpc_cq_begin_op(cq, nullptr));
-    grpc_cq_end_op(&exec_ctx, cq, nullptr, GRPC_ERROR_NONE,
-                   DoneWithCompletionOnStack, nullptr, &completion);
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_cq_end_op(cq, nullptr, GRPC_ERROR_NONE, DoneWithCompletionOnStack,
+                   nullptr, &completion);
+
     grpc_completion_queue_pluck(cq, nullptr, deadline, nullptr);
   }
   grpc_completion_queue_destroy(cq);
diff --git a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
index 7ccebb5..874c834 100644
--- a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
+++ b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
@@ -43,9 +43,8 @@
 static grpc_event_engine_vtable g_vtable;
 static const grpc_event_engine_vtable* g_old_vtable;
 
-static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
-                             grpc_closure* closure) {
-  GRPC_CLOSURE_SCHED(exec_ctx, closure, GRPC_ERROR_NONE);
+static void pollset_shutdown(grpc_pollset* ps, grpc_closure* closure) {
+  GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
 }
 
 static void pollset_init(grpc_pollset* ps, gpr_mu** mu) {
@@ -53,25 +52,20 @@
   *mu = &ps->mu;
 }
 
-static void pollset_destroy(grpc_exec_ctx* exec_ctx, grpc_pollset* ps) {
-  gpr_mu_destroy(&ps->mu);
-}
+static void pollset_destroy(grpc_pollset* ps) { gpr_mu_destroy(&ps->mu); }
 
-static grpc_error* pollset_kick(grpc_exec_ctx* exec_ctx, grpc_pollset* p,
-                                grpc_pollset_worker* worker) {
+static grpc_error* pollset_kick(grpc_pollset* p, grpc_pollset_worker* worker) {
   return GRPC_ERROR_NONE;
 }
 
 /* Callback when the tag is dequeued from the completion queue. Does nothing */
-static void cq_done_cb(grpc_exec_ctx* exec_ctx, void* done_arg,
-                       grpc_cq_completion* cq_completion) {
+static void cq_done_cb(void* done_arg, grpc_cq_completion* cq_completion) {
   gpr_free(cq_completion);
 }
 
 /* Queues a completion tag if deadline is > 0.
  * Does nothing if deadline is 0 (i.e gpr_time_0(GPR_CLOCK_MONOTONIC)) */
-static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps,
-                                grpc_pollset_worker** worker,
+static grpc_error* pollset_work(grpc_pollset* ps, grpc_pollset_worker** worker,
                                 grpc_millis deadline) {
   if (deadline == 0) {
     gpr_log(GPR_DEBUG, "no-op");
@@ -80,9 +74,9 @@
 
   gpr_mu_unlock(&ps->mu);
   GPR_ASSERT(grpc_cq_begin_op(g_cq, g_tag));
-  grpc_cq_end_op(exec_ctx, g_cq, g_tag, GRPC_ERROR_NONE, cq_done_cb, nullptr,
+  grpc_cq_end_op(g_cq, g_tag, GRPC_ERROR_NONE, cq_done_cb, nullptr,
                  (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion)));
-  grpc_exec_ctx_flush(exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_mu_lock(&ps->mu);
   return GRPC_ERROR_NONE;
 }
diff --git a/test/cpp/microbenchmarks/bm_error.cc b/test/cpp/microbenchmarks/bm_error.cc
index bbd8b3c..d12f475 100644
--- a/test/cpp/microbenchmarks/bm_error.cc
+++ b/test/cpp/microbenchmarks/bm_error.cc
@@ -246,14 +246,14 @@
 static void BM_ErrorGetStatus(benchmark::State& state) {
   TrackCounters track_counters;
   Fixture fixture;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     grpc_status_code status;
     grpc_slice slice;
-    grpc_error_get_status(&exec_ctx, fixture.error(), fixture.deadline(),
-                          &status, &slice, nullptr, nullptr);
+    grpc_error_get_status(fixture.error(), fixture.deadline(), &status, &slice,
+                          nullptr, nullptr);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 
@@ -261,13 +261,13 @@
 static void BM_ErrorGetStatusCode(benchmark::State& state) {
   TrackCounters track_counters;
   Fixture fixture;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     grpc_status_code status;
-    grpc_error_get_status(&exec_ctx, fixture.error(), fixture.deadline(),
-                          &status, nullptr, nullptr, nullptr);
+    grpc_error_get_status(fixture.error(), fixture.deadline(), &status, nullptr,
+                          nullptr, nullptr);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 
@@ -275,13 +275,13 @@
 static void BM_ErrorHttpError(benchmark::State& state) {
   TrackCounters track_counters;
   Fixture fixture;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
     grpc_http2_error_code error;
-    grpc_error_get_status(&exec_ctx, fixture.error(), fixture.deadline(),
-                          nullptr, nullptr, &error, nullptr);
+    grpc_error_get_status(fixture.error(), fixture.deadline(), nullptr, nullptr,
+                          &error, nullptr);
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 
diff --git a/test/cpp/microbenchmarks/bm_fullstack_trickle.cc b/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
index 5e72213..d6d7d41 100644
--- a/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
+++ b/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
@@ -177,13 +177,13 @@
   }
 
   void Step(bool update_stats) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     inc_time();
     size_t client_backlog =
-        grpc_trickle_endpoint_trickle(&exec_ctx, endpoint_pair_.client);
+        grpc_trickle_endpoint_trickle(endpoint_pair_.client);
     size_t server_backlog =
-        grpc_trickle_endpoint_trickle(&exec_ctx, endpoint_pair_.server);
-    grpc_exec_ctx_finish(&exec_ctx);
+        grpc_trickle_endpoint_trickle(endpoint_pair_.server);
+
     if (update_stats) {
       UpdateStats((grpc_chttp2_transport*)client_transport_, &client_stats_,
                   client_backlog);
diff --git a/test/cpp/microbenchmarks/bm_metadata.cc b/test/cpp/microbenchmarks/bm_metadata.cc
index 73bce08..f1e7890 100644
--- a/test/cpp/microbenchmarks/bm_metadata.cc
+++ b/test/cpp/microbenchmarks/bm_metadata.cc
@@ -90,11 +90,11 @@
   TrackCounters track_counters;
   gpr_slice k = grpc_slice_from_static_string("key");
   gpr_slice v = grpc_slice_from_static_string("value");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataFromNonInternedSlices);
@@ -103,11 +103,11 @@
   TrackCounters track_counters;
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_intern(grpc_slice_from_static_string("value"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   grpc_slice_unref(v);
   track_counters.Finish(state);
@@ -119,13 +119,13 @@
   TrackCounters track_counters;
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_intern(grpc_slice_from_static_string("value"));
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_mdelem seed = grpc_mdelem_create(&exec_ctx, k, v, nullptr);
+  grpc_core::ExecCtx exec_ctx;
+  grpc_mdelem seed = grpc_mdelem_create(k, v, nullptr);
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, seed);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(seed);
+
   grpc_slice_unref(k);
   grpc_slice_unref(v);
   track_counters.Finish(state);
@@ -136,11 +136,11 @@
   TrackCounters track_counters;
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_from_static_string("value");
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   track_counters.Finish(state);
 }
@@ -152,14 +152,12 @@
   gpr_slice k = grpc_slice_from_static_string("key");
   gpr_slice v = grpc_slice_from_static_string("value");
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(
-        &exec_ctx,
-        grpc_mdelem_create(&exec_ctx, k, v,
-                           reinterpret_cast<grpc_mdelem_data*>(backing_store)));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(
+        k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataFromNonInternedSlicesWithBackingStore);
@@ -170,14 +168,12 @@
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_intern(grpc_slice_from_static_string("value"));
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(
-        &exec_ctx,
-        grpc_mdelem_create(&exec_ctx, k, v,
-                           reinterpret_cast<grpc_mdelem_data*>(backing_store)));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(
+        k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   grpc_slice_unref(v);
   track_counters.Finish(state);
@@ -190,14 +186,12 @@
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_from_static_string("value");
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(
-        &exec_ctx,
-        grpc_mdelem_create(&exec_ctx, k, v,
-                           reinterpret_cast<grpc_mdelem_data*>(backing_store)));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(
+        k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store)));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   track_counters.Finish(state);
 }
@@ -207,11 +201,11 @@
   TrackCounters track_counters;
   gpr_slice k = GRPC_MDSTR_STATUS;
   gpr_slice v = GRPC_MDSTR_200;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   track_counters.Finish(state);
 }
@@ -222,11 +216,11 @@
   TrackCounters track_counters;
   gpr_slice k = GRPC_MDSTR_STATUS;
   gpr_slice v = GRPC_MDSTR_GZIP;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, grpc_mdelem_create(&exec_ctx, k, v, nullptr));
+    GRPC_MDELEM_UNREF(grpc_mdelem_create(k, v, nullptr));
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+
   grpc_slice_unref(k);
   track_counters.Finish(state);
 }
@@ -235,16 +229,15 @@
 static void BM_MetadataRefUnrefExternal(benchmark::State& state) {
   TrackCounters track_counters;
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_mdelem el =
-      grpc_mdelem_create(&exec_ctx, grpc_slice_from_static_string("a"),
-                         grpc_slice_from_static_string("b"),
-                         reinterpret_cast<grpc_mdelem_data*>(backing_store));
+  grpc_core::ExecCtx exec_ctx;
+  grpc_mdelem el = grpc_mdelem_create(
+      grpc_slice_from_static_string("a"), grpc_slice_from_static_string("b"),
+      reinterpret_cast<grpc_mdelem_data*>(backing_store));
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, GRPC_MDELEM_REF(el));
+    GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, el);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(el);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataRefUnrefExternal);
@@ -252,47 +245,47 @@
 static void BM_MetadataRefUnrefInterned(benchmark::State& state) {
   TrackCounters track_counters;
   char backing_store[sizeof(grpc_mdelem_data)];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_slice k = grpc_slice_intern(grpc_slice_from_static_string("key"));
   gpr_slice v = grpc_slice_intern(grpc_slice_from_static_string("value"));
   grpc_mdelem el = grpc_mdelem_create(
-      &exec_ctx, k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store));
+      k, v, reinterpret_cast<grpc_mdelem_data*>(backing_store));
   grpc_slice_unref(k);
   grpc_slice_unref(v);
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, GRPC_MDELEM_REF(el));
+    GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, el);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(el);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataRefUnrefInterned);
 
 static void BM_MetadataRefUnrefAllocated(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem el =
-      grpc_mdelem_create(&exec_ctx, grpc_slice_from_static_string("a"),
+      grpc_mdelem_create(grpc_slice_from_static_string("a"),
                          grpc_slice_from_static_string("b"), nullptr);
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, GRPC_MDELEM_REF(el));
+    GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, el);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(el);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataRefUnrefAllocated);
 
 static void BM_MetadataRefUnrefStatic(benchmark::State& state) {
   TrackCounters track_counters;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_mdelem el =
-      grpc_mdelem_create(&exec_ctx, GRPC_MDSTR_STATUS, GRPC_MDSTR_200, nullptr);
+      grpc_mdelem_create(GRPC_MDSTR_STATUS, GRPC_MDSTR_200, nullptr);
   while (state.KeepRunning()) {
-    GRPC_MDELEM_UNREF(&exec_ctx, GRPC_MDELEM_REF(el));
+    GRPC_MDELEM_UNREF(GRPC_MDELEM_REF(el));
   }
-  GRPC_MDELEM_UNREF(&exec_ctx, el);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_MDELEM_UNREF(el);
+
   track_counters.Finish(state);
 }
 BENCHMARK(BM_MetadataRefUnrefStatic);
diff --git a/test/cpp/microbenchmarks/bm_pollset.cc b/test/cpp/microbenchmarks/bm_pollset.cc
index 4da7969..d9d5164 100644
--- a/test/cpp/microbenchmarks/bm_pollset.cc
+++ b/test/cpp/microbenchmarks/bm_pollset.cc
@@ -41,8 +41,8 @@
 
 auto& force_library_initialization = Library::get();
 
-static void shutdown_ps(grpc_exec_ctx* exec_ctx, void* ps, grpc_error* error) {
-  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(ps));
+static void shutdown_ps(void* ps, grpc_error* error) {
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(ps));
 }
 
 static void BM_CreateDestroyPollset(benchmark::State& state) {
@@ -50,7 +50,7 @@
   size_t ps_sz = grpc_pollset_size();
   grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_malloc(ps_sz));
   gpr_mu* mu;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_closure shutdown_ps_closure;
   GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps,
                     grpc_schedule_on_exec_ctx);
@@ -58,11 +58,11 @@
     memset(ps, 0, ps_sz);
     grpc_pollset_init(ps, &mu);
     gpr_mu_lock(mu);
-    grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure);
+    grpc_pollset_shutdown(ps, &shutdown_ps_closure);
     gpr_mu_unlock(mu);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(ps);
   track_counters.Finish(state);
 }
@@ -114,17 +114,17 @@
   grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz));
   gpr_mu* mu;
   grpc_pollset_init(ps, &mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   gpr_mu_lock(mu);
   while (state.KeepRunning()) {
-    GRPC_ERROR_UNREF(grpc_pollset_work(&exec_ctx, ps, nullptr, 0));
+    GRPC_ERROR_UNREF(grpc_pollset_work(ps, nullptr, 0));
   }
   grpc_closure shutdown_ps_closure;
   GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure);
+  grpc_pollset_shutdown(ps, &shutdown_ps_closure);
   gpr_mu_unlock(mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(ps);
   track_counters.Finish(state);
 }
@@ -136,24 +136,23 @@
   grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz));
   gpr_mu* mu;
   grpc_pollset_init(ps, &mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_wakeup_fd wakeup_fd;
   GPR_ASSERT(
       GRPC_LOG_IF_ERROR("wakeup_fd_init", grpc_wakeup_fd_init(&wakeup_fd)));
   grpc_fd* fd = grpc_fd_create(wakeup_fd.read_fd, "xxx");
   while (state.KeepRunning()) {
-    grpc_pollset_add_fd(&exec_ctx, ps, fd);
-    grpc_exec_ctx_flush(&exec_ctx);
+    grpc_pollset_add_fd(ps, fd);
+    grpc_core::ExecCtx::Get()->Flush();
   }
-  grpc_fd_orphan(&exec_ctx, fd, nullptr, nullptr, false /* already_closed */,
-                 "xxx");
+  grpc_fd_orphan(fd, nullptr, nullptr, false /* already_closed */, "xxx");
   grpc_closure shutdown_ps_closure;
   GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps,
                     grpc_schedule_on_exec_ctx);
   gpr_mu_lock(mu);
-  grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure);
+  grpc_pollset_shutdown(ps, &shutdown_ps_closure);
   gpr_mu_unlock(mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   gpr_free(ps);
   track_counters.Finish(state);
 }
@@ -170,7 +169,7 @@
     C(F f, grpc_closure_scheduler* scheduler) : f_(f) {
       GRPC_CLOSURE_INIT(this, C::cbfn, this, scheduler);
     }
-    static void cbfn(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {
+    static void cbfn(void* arg, grpc_error* error) {
       C* p = static_cast<C*>(arg);
       p->f_();
     }
@@ -219,11 +218,11 @@
   grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz));
   gpr_mu* mu;
   grpc_pollset_init(ps, &mu);
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   grpc_wakeup_fd wakeup_fd;
   GRPC_ERROR_UNREF(grpc_wakeup_fd_init(&wakeup_fd));
   grpc_fd* wakeup = grpc_fd_create(wakeup_fd.read_fd, "wakeup_read");
-  grpc_pollset_add_fd(&exec_ctx, ps, wakeup);
+  grpc_pollset_add_fd(ps, wakeup);
   bool done = false;
   Closure* continue_closure = MakeClosure(
       [&]() {
@@ -233,25 +232,23 @@
           return;
         }
         GRPC_ERROR_UNREF(grpc_wakeup_fd_wakeup(&wakeup_fd));
-        grpc_fd_notify_on_read(&exec_ctx, wakeup, continue_closure);
+        grpc_fd_notify_on_read(wakeup, continue_closure);
       },
       grpc_schedule_on_exec_ctx);
   GRPC_ERROR_UNREF(grpc_wakeup_fd_wakeup(&wakeup_fd));
-  grpc_fd_notify_on_read(&exec_ctx, wakeup, continue_closure);
+  grpc_fd_notify_on_read(wakeup, continue_closure);
   gpr_mu_lock(mu);
   while (!done) {
-    GRPC_ERROR_UNREF(
-        grpc_pollset_work(&exec_ctx, ps, nullptr, GRPC_MILLIS_INF_FUTURE));
+    GRPC_ERROR_UNREF(grpc_pollset_work(ps, nullptr, GRPC_MILLIS_INF_FUTURE));
   }
-  grpc_fd_orphan(&exec_ctx, wakeup, nullptr, nullptr,
-                 false /* already_closed */, "done");
+  grpc_fd_orphan(wakeup, nullptr, nullptr, false /* already_closed */, "done");
   wakeup_fd.read_fd = 0;
   grpc_closure shutdown_ps_closure;
   GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure);
+  grpc_pollset_shutdown(ps, &shutdown_ps_closure);
   gpr_mu_unlock(mu);
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   grpc_wakeup_fd_destroy(&wakeup_fd);
   gpr_free(ps);
   track_counters.Finish(state);
diff --git a/test/cpp/microbenchmarks/fullstack_fixtures.h b/test/cpp/microbenchmarks/fullstack_fixtures.h
index 7f1aa48..d1ede75 100644
--- a/test/cpp/microbenchmarks/fullstack_fixtures.h
+++ b/test/cpp/microbenchmarks/fullstack_fixtures.h
@@ -166,7 +166,7 @@
     fixture_configuration.ApplyCommonServerBuilderConfig(&b);
     server_ = b.BuildAndStart();
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
 
     /* add server endpoint to server_
      * */
@@ -174,20 +174,19 @@
       const grpc_channel_args* server_args =
           grpc_server_get_channel_args(server_->c_server());
       server_transport_ = grpc_create_chttp2_transport(
-          &exec_ctx, server_args, endpoints.server, 0 /* is_client */);
+          server_args, endpoints.server, false /* is_client */);
 
       grpc_pollset** pollsets;
       size_t num_pollsets = 0;
       grpc_server_get_pollsets(server_->c_server(), &pollsets, &num_pollsets);
 
       for (size_t i = 0; i < num_pollsets; i++) {
-        grpc_endpoint_add_to_pollset(&exec_ctx, endpoints.server, pollsets[i]);
+        grpc_endpoint_add_to_pollset(endpoints.server, pollsets[i]);
       }
 
-      grpc_server_setup_transport(&exec_ctx, server_->c_server(),
-                                  server_transport_, nullptr, server_args);
-      grpc_chttp2_transport_start_reading(&exec_ctx, server_transport_,
-                                          nullptr);
+      grpc_server_setup_transport(server_->c_server(), server_transport_,
+                                  nullptr, server_args);
+      grpc_chttp2_transport_start_reading(server_transport_, nullptr, nullptr);
     }
 
     /* create channel */
@@ -198,18 +197,14 @@
 
       grpc_channel_args c_args = args.c_channel_args();
       client_transport_ =
-          grpc_create_chttp2_transport(&exec_ctx, &c_args, endpoints.client, 1);
+          grpc_create_chttp2_transport(&c_args, endpoints.client, true);
       GPR_ASSERT(client_transport_);
-      grpc_channel* channel =
-          grpc_channel_create(&exec_ctx, "target", &c_args,
-                              GRPC_CLIENT_DIRECT_CHANNEL, client_transport_);
-      grpc_chttp2_transport_start_reading(&exec_ctx, client_transport_,
-                                          nullptr);
+      grpc_channel* channel = grpc_channel_create(
+          "target", &c_args, GRPC_CLIENT_DIRECT_CHANNEL, client_transport_);
+      grpc_chttp2_transport_start_reading(client_transport_, nullptr, nullptr);
 
       channel_ = CreateChannelInternal("", channel);
     }
-
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   virtual ~EndpointPairFixture() {
diff --git a/test/cpp/naming/resolver_component_test.cc b/test/cpp/naming/resolver_component_test.cc
index 6f1f0c4..3481d9d 100644
--- a/test/cpp/naming/resolver_component_test.cc
+++ b/test/cpp/naming/resolver_component_test.cc
@@ -149,33 +149,33 @@
   std::string expected_lb_policy;
 };
 
-void ArgsInit(grpc_exec_ctx* exec_ctx, ArgsStruct* args) {
+void ArgsInit(ArgsStruct* args) {
   gpr_event_init(&args->ev);
   args->pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
   grpc_pollset_init(args->pollset, &args->mu);
   args->pollset_set = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
+  grpc_pollset_set_add_pollset(args->pollset_set, args->pollset);
   args->lock = grpc_combiner_create();
   gpr_atm_rel_store(&args->done_atm, 0);
   args->channel_args = nullptr;
 }
 
-void DoNothing(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) {}
+void DoNothing(void* arg, grpc_error* error) {}
 
-void ArgsFinish(grpc_exec_ctx* exec_ctx, ArgsStruct* args) {
+void ArgsFinish(ArgsStruct* args) {
   GPR_ASSERT(gpr_event_wait(&args->ev, TestDeadline()));
-  grpc_pollset_set_del_pollset(exec_ctx, args->pollset_set, args->pollset);
-  grpc_pollset_set_destroy(exec_ctx, args->pollset_set);
+  grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
+  grpc_pollset_set_destroy(args->pollset_set);
   grpc_closure DoNothing_cb;
   GRPC_CLOSURE_INIT(&DoNothing_cb, DoNothing, nullptr,
                     grpc_schedule_on_exec_ctx);
-  grpc_pollset_shutdown(exec_ctx, args->pollset, &DoNothing_cb);
+  grpc_pollset_shutdown(args->pollset, &DoNothing_cb);
   // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
-  grpc_channel_args_destroy(exec_ctx, args->channel_args);
-  grpc_exec_ctx_flush(exec_ctx);
-  grpc_pollset_destroy(exec_ctx, args->pollset);
+  grpc_channel_args_destroy(args->channel_args);
+  grpc_core::ExecCtx::Get()->Flush();
+  grpc_pollset_destroy(args->pollset);
   gpr_free(args->pollset);
-  GRPC_COMBINER_UNREF(exec_ctx, args->lock, NULL);
+  GRPC_COMBINER_UNREF(args->lock, nullptr);
 }
 
 gpr_timespec NSecondDeadline(int seconds) {
@@ -196,14 +196,13 @@
             time_left.tv_sec, time_left.tv_nsec);
     GPR_ASSERT(gpr_time_cmp(time_left, gpr_time_0(GPR_TIMESPAN)) >= 0);
     grpc_pollset_worker* worker = nullptr;
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
     gpr_mu_lock(args->mu);
     GRPC_LOG_IF_ERROR("pollset_work",
-                      grpc_pollset_work(&exec_ctx, args->pollset, &worker,
+                      grpc_pollset_work(args->pollset, &worker,
                                         grpc_timespec_to_millis_round_up(
                                             NSecondDeadline(1))));
     gpr_mu_unlock(args->mu);
-    grpc_exec_ctx_finish(&exec_ctx);
   }
   gpr_event_set(&args->ev, (void*)1);
 }
@@ -235,8 +234,7 @@
   }
 }
 
-void CheckResolverResultLocked(grpc_exec_ctx* exec_ctx, void* argsp,
-                               grpc_error* err) {
+void CheckResolverResultLocked(void* argsp, grpc_error* err) {
   ArgsStruct* args = (ArgsStruct*)argsp;
   grpc_channel_args* channel_args = args->channel_args;
   const grpc_arg* channel_arg =
@@ -272,15 +270,14 @@
   }
   gpr_atm_rel_store(&args->done_atm, 1);
   gpr_mu_lock(args->mu);
-  GRPC_LOG_IF_ERROR("pollset_kick",
-                    grpc_pollset_kick(exec_ctx, args->pollset, nullptr));
+  GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr));
   gpr_mu_unlock(args->mu);
 }
 
 TEST(ResolverComponentTest, TestResolvesRelevantRecords) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_core::ExecCtx exec_ctx;
   ArgsStruct args;
-  ArgsInit(&exec_ctx, &args);
+  ArgsInit(&args);
   args.expected_addrs = ParseExpectedAddrs(FLAGS_expected_addrs);
   args.expected_service_config_string = FLAGS_expected_chosen_service_config;
   args.expected_lb_policy = FLAGS_expected_lb_policy;
@@ -290,19 +287,18 @@
                       FLAGS_local_dns_server_address.c_str(),
                       FLAGS_target_name.c_str()));
   // create resolver and resolve
-  grpc_resolver* resolver = grpc_resolver_create(&exec_ctx, whole_uri, nullptr,
-                                                 args.pollset_set, args.lock);
+  grpc_resolver* resolver =
+      grpc_resolver_create(whole_uri, nullptr, args.pollset_set, args.lock);
   gpr_free(whole_uri);
   grpc_closure on_resolver_result_changed;
   GRPC_CLOSURE_INIT(&on_resolver_result_changed, CheckResolverResultLocked,
                     (void*)&args, grpc_combiner_scheduler(args.lock));
-  grpc_resolver_next_locked(&exec_ctx, resolver, &args.channel_args,
+  grpc_resolver_next_locked(resolver, &args.channel_args,
                             &on_resolver_result_changed);
-  grpc_exec_ctx_flush(&exec_ctx);
+  grpc_core::ExecCtx::Get()->Flush();
   PollPollsetUntilRequestDone(&args);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, NULL);
-  ArgsFinish(&exec_ctx, &args);
-  grpc_exec_ctx_finish(&exec_ctx);
+  GRPC_RESOLVER_UNREF(resolver, nullptr);
+  ArgsFinish(&args);
 }
 
 }  // namespace
diff --git a/test/cpp/performance/writes_per_rpc_test.cc b/test/cpp/performance/writes_per_rpc_test.cc
index 23fff2e..0b9dc83 100644
--- a/test/cpp/performance/writes_per_rpc_test.cc
+++ b/test/cpp/performance/writes_per_rpc_test.cc
@@ -82,26 +82,26 @@
     ApplyCommonServerBuilderConfig(&b);
     server_ = b.BuildAndStart();
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_core::ExecCtx exec_ctx;
 
     /* add server endpoint to server_ */
     {
       const grpc_channel_args* server_args =
           grpc_server_get_channel_args(server_->c_server());
       grpc_transport* transport = grpc_create_chttp2_transport(
-          &exec_ctx, server_args, endpoints.server, 0 /* is_client */);
+          server_args, endpoints.server, false /* is_client */);
 
       grpc_pollset** pollsets;
       size_t num_pollsets = 0;
       grpc_server_get_pollsets(server_->c_server(), &pollsets, &num_pollsets);
 
       for (size_t i = 0; i < num_pollsets; i++) {
-        grpc_endpoint_add_to_pollset(&exec_ctx, endpoints.server, pollsets[i]);
+        grpc_endpoint_add_to_pollset(endpoints.server, pollsets[i]);
       }
 
-      grpc_server_setup_transport(&exec_ctx, server_->c_server(), transport,
-                                  nullptr, server_args);
-      grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
+      grpc_server_setup_transport(server_->c_server(), transport, nullptr,
+                                  server_args);
+      grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
     }
 
     /* create channel */
@@ -112,16 +112,14 @@
 
       grpc_channel_args c_args = args.c_channel_args();
       grpc_transport* transport =
-          grpc_create_chttp2_transport(&exec_ctx, &c_args, endpoints.client, 1);
+          grpc_create_chttp2_transport(&c_args, endpoints.client, true);
       GPR_ASSERT(transport);
       grpc_channel* channel = grpc_channel_create(
-          &exec_ctx, "target", &c_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
-      grpc_chttp2_transport_start_reading(&exec_ctx, transport, nullptr);
+          "target", &c_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+      grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
 
       channel_ = CreateChannelInternal("", channel);
     }
-
-    grpc_exec_ctx_finish(&exec_ctx);
   }
 
   virtual ~EndpointPairFixture() {
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 0788821..7cf9d3e 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -280,6 +280,7 @@
         },
         &got_tag, &ok, gpr_inf_future(GPR_CLOCK_REALTIME))) {
       t->UpdateHistogram(entry_ptr);
+      entry = HistogramEntry();
       shutdown_mu->lock();
       ctx = ProcessTag(thread_idx, got_tag);
       if (ctx == nullptr) {
diff --git a/test/cpp/server/server_builder_test.cc b/test/cpp/server/server_builder_test.cc
index d18459c..694ce54 100644
--- a/test/cpp/server/server_builder_test.cc
+++ b/test/cpp/server/server_builder_test.cc
@@ -22,6 +22,8 @@
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 
+#include <grpc/grpc.h>
+
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 
@@ -77,5 +79,8 @@
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/test/cpp/util/byte_buffer_test.cc b/test/cpp/util/byte_buffer_test.cc
index 8fb51bc..d603b28 100644
--- a/test/cpp/util/byte_buffer_test.cc
+++ b/test/cpp/util/byte_buffer_test.cc
@@ -22,6 +22,7 @@
 #include <vector>
 
 #include <grpc++/support/slice.h>
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <gtest/gtest.h>
 
@@ -109,5 +110,8 @@
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/test/cpp/util/slice_test.cc b/test/cpp/util/slice_test.cc
index 8a8962d..c2e55f3 100644
--- a/test/cpp/util/slice_test.cc
+++ b/test/cpp/util/slice_test.cc
@@ -18,6 +18,7 @@
 
 #include <grpc++/support/slice.h>
 
+#include <grpc/grpc.h>
 #include <grpc/slice.h>
 #include <gtest/gtest.h>
 
@@ -127,5 +128,8 @@
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  grpc_init();
+  int ret = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return ret;
 }
diff --git a/tools/codegen/core/gen_static_metadata.py b/tools/codegen/core/gen_static_metadata.py
index 355f3f4..7847b8e 100755
--- a/tools/codegen/core/gen_static_metadata.py
+++ b/tools/codegen/core/gen_static_metadata.py
@@ -395,7 +395,7 @@
     ','.join('%d' % ord(c) for c in ''.join(all_strs)))
 print >> C
 print >> C, 'static void static_ref(void *unused) {}'
-print >> C, 'static void static_unref(grpc_exec_ctx *exec_ctx, void *unused) {}'
+print >> C, 'static void static_unref(void *unused) {}'
 print >> C, ('static const grpc_slice_refcount_vtable static_sub_vtable = '
              '{static_ref, static_unref, grpc_slice_default_eq_impl, '
              'grpc_slice_default_hash_impl};')
diff --git a/tools/codegen/core/gen_stats_data.py b/tools/codegen/core/gen_stats_data.py
index 072a677..d439d99 100755
--- a/tools/codegen/core/gen_stats_data.py
+++ b/tools/codegen/core/gen_stats_data.py
@@ -150,11 +150,11 @@
   code = 'value = GPR_CLAMP(value, 0, %d);\n' % histogram.max
   map_table = gen_map_table(code_bounds[first_nontrivial:], shift_data)
   if first_nontrivial is None:
-    code += ('GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_%s, value);\n'
+    code += ('GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_%s, value);\n'
              % histogram.name.upper())
   else:
     code += 'if (value < %d) {\n' % first_nontrivial
-    code += ('GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_%s, value);\n'
+    code += ('GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_%s, value);\n'
              % histogram.name.upper())
     code += 'return;\n'
     code += '}'
@@ -168,11 +168,11 @@
       code += 'grpc_stats_table_%d[((_val.uint - %dull) >> %d)] + %d;\n' % (map_table_idx, first_nontrivial_code, shift_data[0], first_nontrivial)
       code += '_bkt.dbl = grpc_stats_table_%d[bucket];\n' % bounds_idx
       code += 'bucket -= (_val.uint < _bkt.uint);\n'
-      code += 'GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_%s, bucket);\n' % histogram.name.upper()
+      code += 'GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_%s, bucket);\n' % histogram.name.upper()
       code += 'return;\n'
       code += '}\n'
-    code += 'GRPC_STATS_INC_HISTOGRAM((exec_ctx), GRPC_STATS_HISTOGRAM_%s, '% histogram.name.upper()
-    code += 'grpc_stats_histo_find_bucket_slow((exec_ctx), value, grpc_stats_table_%d, %d));\n' % (bounds_idx, histogram.buckets)
+    code += 'GRPC_STATS_INC_HISTOGRAM(GRPC_STATS_HISTOGRAM_%s, '% histogram.name.upper()
+    code += 'grpc_stats_histo_find_bucket_slow(value, grpc_stats_table_%d, %d));\n' % (bounds_idx, histogram.buckets)
   return (code, bounds_idx)
 
 # utility: print a big comment block into a set of files
@@ -240,13 +240,13 @@
   print >>H, "} grpc_stats_histogram_constants;"
 
   for ctr in inst_map['Counter']:
-    print >>H, ("#define GRPC_STATS_INC_%s(exec_ctx) " +
-                "GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_%s)") % (
+    print >>H, ("#define GRPC_STATS_INC_%s() " +
+                "GRPC_STATS_INC_COUNTER(GRPC_STATS_COUNTER_%s)") % (
                 ctr.name.upper(), ctr.name.upper())
   for histogram in inst_map['Histogram']:
-    print >>H, "#define GRPC_STATS_INC_%s(exec_ctx, value) grpc_stats_inc_%s((exec_ctx), (int)(value))" % (
+    print >>H, "#define GRPC_STATS_INC_%s(value) grpc_stats_inc_%s( (int)(value))" % (
         histogram.name.upper(), histogram.name.lower())
-    print >>H, "void grpc_stats_inc_%s(grpc_exec_ctx *exec_ctx, int x);" % histogram.name.lower()
+    print >>H, "void grpc_stats_inc_%s(int x);" % histogram.name.lower()
 
   for i, tbl in enumerate(static_tables):
     print >>H, "extern const %s grpc_stats_table_%d[%d];" % (tbl[0], i, len(tbl[1]))
@@ -254,7 +254,7 @@
   print >>H, "extern const int grpc_stats_histo_buckets[%d];" % len(inst_map['Histogram'])
   print >>H, "extern const int grpc_stats_histo_start[%d];" % len(inst_map['Histogram'])
   print >>H, "extern const int *const grpc_stats_histo_bucket_boundaries[%d];" % len(inst_map['Histogram'])
-  print >>H, "extern void (*const grpc_stats_inc_histogram[%d])(grpc_exec_ctx *exec_ctx, int x);" % len(inst_map['Histogram'])
+  print >>H, "extern void (*const grpc_stats_inc_histogram[%d])(int x);" % len(inst_map['Histogram'])
 
   print >>H
   print >>H, "#ifdef __cplusplus"
@@ -309,7 +309,7 @@
         tbl[0], i, len(tbl[1]), ','.join('%s' % x for x in tbl[1]))
 
   for histogram, code in zip(inst_map['Histogram'], histo_code):
-    print >>C, ("void grpc_stats_inc_%s(grpc_exec_ctx *exec_ctx, int value) {%s}") % (
+    print >>C, ("void grpc_stats_inc_%s(int value) {%s}") % (
                 histogram.name.lower(),
                 code)
 
@@ -319,7 +319,7 @@
       len(inst_map['Histogram']), ','.join('%s' % x for x in histo_start))
   print >>C, "const int *const grpc_stats_histo_bucket_boundaries[%d] = {%s};" % (
       len(inst_map['Histogram']), ','.join('grpc_stats_table_%d' % x for x in histo_bucket_boundaries))
-  print >>C, "void (*const grpc_stats_inc_histogram[%d])(grpc_exec_ctx *exec_ctx, int x) = {%s};" % (
+  print >>C, "void (*const grpc_stats_inc_histogram[%d])(int x) = {%s};" % (
       len(inst_map['Histogram']), ','.join('grpc_stats_inc_%s' % histogram.name.lower() for histogram in inst_map['Histogram']))
 
 # patch qps_test bigquery schema
diff --git a/tools/internal_ci/linux/grpc_bazel_on_foundry.sh b/tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh
similarity index 99%
copy from tools/internal_ci/linux/grpc_bazel_on_foundry.sh
copy to tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh
index e328be8..c43ac0e 100644
--- a/tools/internal_ci/linux/grpc_bazel_on_foundry.sh
+++ b/tools/internal_ci/linux/grpc_bazel_on_foundry_dbg.sh
@@ -52,4 +52,5 @@
   --experimental_remote_platform_override='properties:{name:"container-image" value:"docker://gcr.io/asci-toolchain/nosla-debian8-clang-fl@sha256:aa20628a902f06a11a015caa94b0432eb60690de2d2525bd046b9eea046f5d8a" }' \
   --crosstool_top=@bazel_toolchains//configs/debian8_clang/0.2.0/bazel_0.7.0:toolchain \
   --define GRPC_PORT_ISOLATED_RUNTIME=1 \
+  -c dbg \
   -- //test/...
diff --git a/tools/internal_ci/linux/grpc_bazel_on_foundry.sh b/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh
similarity index 99%
rename from tools/internal_ci/linux/grpc_bazel_on_foundry.sh
rename to tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh
index e328be8..b106b71 100644
--- a/tools/internal_ci/linux/grpc_bazel_on_foundry.sh
+++ b/tools/internal_ci/linux/grpc_bazel_on_foundry_opt.sh
@@ -52,4 +52,5 @@
   --experimental_remote_platform_override='properties:{name:"container-image" value:"docker://gcr.io/asci-toolchain/nosla-debian8-clang-fl@sha256:aa20628a902f06a11a015caa94b0432eb60690de2d2525bd046b9eea046f5d8a" }' \
   --crosstool_top=@bazel_toolchains//configs/debian8_clang/0.2.0/bazel_0.7.0:toolchain \
   --define GRPC_PORT_ISOLATED_RUNTIME=1 \
+  -c opt \
   -- //test/...
diff --git a/tools/interop_matrix/client_matrix.py b/tools/interop_matrix/client_matrix.py
index c9a4996..7b02f51 100644
--- a/tools/interop_matrix/client_matrix.py
+++ b/tools/interop_matrix/client_matrix.py
@@ -23,6 +23,18 @@
       # all other languages use the grpc.git repo.
   }.get(lang, 'git@github.com:grpc/grpc.git')
 
+def get_release_tags(lang):
+  return map(lambda r: get_release_tag_name(r), LANG_RELEASE_MATRIX[lang])
+
+def get_release_tag_name(release_info):
+  assert len(release_info.keys()) == 1
+  return release_info.keys()[0]
+
+def should_build_docker_interop_image_from_release_tag(lang):
+  if lang in ['go', 'java', 'node']:
+    return False
+  return True
+
 # Dictionary of runtimes per language
 LANG_RUNTIME_MATRIX = {
     'cxx': ['cxx'],             # This is actually debian8.
@@ -39,81 +51,84 @@
 # a release tag pointing to the latest build of the branch.
 LANG_RELEASE_MATRIX = {
     'cxx': [
-        'v1.0.1',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',
+        {'v1.0.1': None},
+        {'v1.1.4': None},
+        {'v1.2.5': None},
+        {'v1.3.9': None},
+        {'v1.4.2': None},
+        {'v1.6.6': None},
+        {'v1.7.2': None},
     ],
     'go': [
-        'v1.0.5',
-        'v1.2.1',
-        'v1.3.0',
-        'v1.4.2',
-        'v1.5.2',
-        'v1.6.0',
-        'v1.7.0',
-        'v1.7.1',
-        'v1.7.2',
-        'v1.7.3',
-        'v1.8.0',
+        {'v1.0.5': None},
+        {'v1.2.1': None},
+        {'v1.3.0': None},
+        {'v1.4.2': None},
+        {'v1.5.2': None},
+        {'v1.6.0': None},
+        {'v1.7.0': None},
+        {'v1.7.1': None},
+        {'v1.7.2': None},
+        {'v1.7.3': None},
+        {'v1.8.0': None},
     ],
     'java': [
-        'v1.0.3',
-        'v1.1.2',
-        'v1.2.0',
-        'v1.3.1',
-        'v1.4.0',
-        'v1.5.0',
-        'v1.6.1',
-        'v1.7.0',
-        'v1.8.0',
+        {'v1.0.3': None},
+        {'v1.1.2': None},
+        {'v1.2.0': None},
+        {'v1.3.1': None},
+        {'v1.4.0': None},
+        {'v1.5.0': None},
+        {'v1.6.1': None},
+        {'v1.7.0': None},
+        {'v1.8.0': None},
     ],
     'python': [
-        'v1.0.x',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',    
+        {'v1.0.x': None},
+        {'v1.1.4': None},
+        {'v1.2.5': None},
+        {'v1.3.9': None},
+        {'v1.4.2': None},
+        {'v1.6.6': None},
+        {'v1.7.2': None},
     ],
     'node': [
-        'v1.0.1',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        #'v1.7.1',  Failing tests.
+        {'v1.0.1': None},
+        {'v1.1.4': None},
+        {'v1.2.5': None},
+        {'v1.3.9': None},
+        {'v1.4.2': None},
+        {'v1.6.6': None},
+        #{'v1.7.1': None}, Failing tests
     ],
     'ruby': [
-        # Ruby v1.0.x doesn't have the fix #8914, therefore not supported.
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',
+        {'v1.0.1': {'patch': [
+            'tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile',
+            'tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh',
+        ]}},
+        {'v1.1.4': None},
+        {'v1.2.5': None},
+        {'v1.3.9': None},
+        {'v1.4.2': None},
+        {'v1.6.6': None},
+        {'v1.7.2': None},
     ],
     'php': [
-        'v1.0.1',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',
+        {'v1.0.1': None},
+        {'v1.1.4': None},
+        {'v1.2.5': None},
+        {'v1.3.9': None},
+        {'v1.4.2': None},
+        {'v1.6.6': None},
+        {'v1.7.2': None},
     ],
    'csharp': [
-        #'v1.0.1',
-        'v1.1.4',
-        'v1.2.5',
-        'v1.3.9',
-        'v1.4.2',
-        'v1.6.6',
-        'v1.7.2',
+        #{'v1.0.1': None},
+        {'v1.1.4': None},
+        {'v1.2.5': None},
+        {'v1.3.9': None},
+        {'v1.4.2': None},
+        {'v1.6.6': None},
+        {'v1.7.2': None},
     ],
 }
diff --git a/tools/interop_matrix/create_matrix_images.py b/tools/interop_matrix/create_matrix_images.py
index 493a7d5..a292368 100755
--- a/tools/interop_matrix/create_matrix_images.py
+++ b/tools/interop_matrix/create_matrix_images.py
@@ -39,7 +39,7 @@
 _LANGUAGES = client_matrix.LANG_RUNTIME_MATRIX.keys()
 # All gRPC release tags, flattened, deduped and sorted.
 _RELEASES = sorted(list(set(
-    i for l in client_matrix.LANG_RELEASE_MATRIX.values() for i in l)))
+    client_matrix.get_release_tag_name(info) for lang in client_matrix.LANG_RELEASE_MATRIX.values() for info in lang)))
 
 # Destination directory inside docker image to keep extra info from build time.
 _BUILD_INFO = '/var/local/build_info'
@@ -141,8 +141,11 @@
       'TTY_FLAG': '-t'
   }
   build_env.update(env)
+  image_builder_path = _IMAGE_BUILDER
+  if client_matrix.should_build_docker_interop_image_from_release_tag(lang):
+    image_builder_path = os.path.join(stack_base, _IMAGE_BUILDER)
   build_job = jobset.JobSpec(
-          cmdline=[_IMAGE_BUILDER],
+          cmdline=[image_builder_path],
           environ=build_env,
           shortname='build_docker_%s' % runtime,
           timeout_seconds=30*60)
@@ -157,10 +160,10 @@
     releases = ['master']
   else:
     if args.release == 'all':
-      releases = client_matrix.LANG_RELEASE_MATRIX[lang]
+      releases = client_matrix.get_release_tags(lang)
     else:
       # Build a particular release.
-      if args.release not in ['master'] + client_matrix.LANG_RELEASE_MATRIX[lang]:
+      if args.release not in ['master'] + client_matrix.get_release_tags(lang):
         jobset.message('SKIPPED',
                        '%s for %s is not defined' % (args.release, lang),
                        do_newline=True)
@@ -223,6 +226,33 @@
 docker_images_cleanup = []
 atexit.register(cleanup)
 
+def maybe_apply_patches_on_git_tag(stack_base, lang, release):
+  files_to_patch = []
+  for release_info in client_matrix.LANG_RELEASE_MATRIX[lang]:
+    if client_matrix.get_release_tag_name(release_info) == release:
+      files_to_patch = release_info[release].get('patch')
+      break
+  if not files_to_patch:
+    return
+  patch_file_relative_path = 'patches/%s_%s/git_repo.patch' % (lang, release)
+  patch_file = os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                            patch_file_relative_path))
+  if not os.path.exists(patch_file):
+    jobset.message('FAILED', 'expected patch file |%s| to exist' % patch_file)
+    sys.exit(1)
+  subprocess.check_output(
+      ['git', 'apply', patch_file], cwd=stack_base, stderr=subprocess.STDOUT)
+  for repo_relative_path in files_to_patch:
+    subprocess.check_output(
+        ['git', 'add', repo_relative_path],
+        cwd=stack_base,
+        stderr=subprocess.STDOUT)
+  subprocess.check_output(
+      ['git', 'commit', '-m', ('Hack performed on top of %s git '
+                               'tag in order to build and run the %s '
+                               'interop tests on that tag.' % (lang, release))],
+      cwd=stack_base, stderr=subprocess.STDOUT)
+
 def checkout_grpc_stack(lang, release):
   """Invokes 'git check' for the lang/release and returns directory created."""
   assert args.git_checkout and args.git_checkout_root
@@ -252,6 +282,7 @@
   assert not os.path.dirname(__file__).startswith(stack_base)
   output = subprocess.check_output(
       ['git', 'checkout', release], cwd=stack_base, stderr=subprocess.STDOUT)
+  maybe_apply_patches_on_git_tag(stack_base, lang, release)
   commit_log = subprocess.check_output(['git', 'log', '-1'], cwd=stack_base)
   jobset.message('SUCCESS', 'git checkout', 
                  '%s: %s' % (str(output), commit_log), 
diff --git a/tools/interop_matrix/patches/README.md b/tools/interop_matrix/patches/README.md
new file mode 100644
index 0000000..0c0893f
--- /dev/null
+++ b/tools/interop_matrix/patches/README.md
@@ -0,0 +1,38 @@
+# Patches to grpc repo tags for the backwards compatibility interop tests
+
+This directory has patch files that can be applied to different tags
+of the grpc git repo in order to run the interop tests for a specific
+language based on that tag.
+
+For example, because the ruby interop tests do not run on the v1.0.1 tag out
+of the box, but we still want to test compatibility of the 1.0.1 ruby release
+with other versions, we can apply a patch to the v1.0.1 tag from this directory
+that makes the necessary changes that are needed to run the ruby interop tests
+from that tag. We can then use that patch to build the docker image for the
+ruby v1.0.1 interop tests.
+
+## How to add a new patch to this directory
+
+Patch files in this directory are meant to be applied to a git tag
+with a `git apply` command.
+
+1. Under the `patches` directory, create a new subdirectory
+titled `<language>_<git_tag>` for the git tag being modified.
+
+2. `git checkout <git_tag>`
+
+3. Make necessary modifications to the git repo at that tag.
+
+4. 
+
+```
+git diff > ~/git_repo.patch
+git checkout <current working branch>
+cp ~/git_repo.patch tools/interop_matrix/patches/<language>_<git_tag>/
+```
+
+5. Edit the `LANGUAGE_RELEASE_MATRIX` in `client_matrix.py` for your language/tag
+and add a `'patch': [<files>,....]` entry to it's `dictionary`.
+
+After doing this, the interop image creation script can apply that patch to the
+tag with `git apply` before uploading to the test image repo.
diff --git a/tools/interop_matrix/patches/ruby_v1.0.1/git_repo.patch b/tools/interop_matrix/patches/ruby_v1.0.1/git_repo.patch
new file mode 100644
index 0000000..0cd92d6
--- /dev/null
+++ b/tools/interop_matrix/patches/ruby_v1.0.1/git_repo.patch
@@ -0,0 +1,34 @@
+diff --git a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
+index 88b5130..7ae9f7d 100644
+--- a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
++++ b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
+@@ -70,12 +70,12 @@ RUN apt-get update && apt-get install -y time && apt-get clean
+ RUN gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
+ RUN \curl -sSL https://get.rvm.io | bash -s stable
+ 
+-# Install Ruby 2.1
+-RUN /bin/bash -l -c "rvm install ruby-2.1"
+-RUN /bin/bash -l -c "rvm use --default ruby-2.1"
++# Install Ruby 2.1.8
++RUN /bin/bash -l -c "rvm install ruby-2.1.8"
++RUN /bin/bash -l -c "rvm use --default ruby-2.1.8"
+ RUN /bin/bash -l -c "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"
+ RUN /bin/bash -l -c "echo 'export PATH=/usr/local/rvm/bin:$PATH' >> ~/.bashrc"
+-RUN /bin/bash -l -c "echo 'rvm --default use ruby-2.1' >> ~/.bashrc"
++RUN /bin/bash -l -c "echo 'rvm --default use ruby-2.1.8' >> ~/.bashrc"
+ RUN /bin/bash -l -c "gem install bundler --no-ri --no-rdoc"
+ 
+ # Prepare ccache
+diff --git a/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh b/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
+index 97b3860..cec046d 100755
+--- a/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
++++ b/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
+@@ -38,7 +38,7 @@ git clone --recursive /var/local/jenkins/grpc /var/local/git/grpc
+ cp -r /var/local/jenkins/service_account $HOME || true
+ 
+ cd /var/local/git/grpc
+-rvm --default use ruby-2.1
++rvm --default use ruby-2.1.8
+ 
+ # build Ruby interop client and server
+ (cd src/ruby && gem update bundler && bundle && rake compile)
diff --git a/tools/interop_matrix/run_interop_matrix_tests.py b/tools/interop_matrix/run_interop_matrix_tests.py
index 4265bc5..1bc35d9 100755
--- a/tools/interop_matrix/run_interop_matrix_tests.py
+++ b/tools/interop_matrix/run_interop_matrix_tests.py
@@ -41,7 +41,7 @@
 _LANGUAGES = client_matrix.LANG_RUNTIME_MATRIX.keys()
 # All gRPC release tags, flattened, deduped and sorted.
 _RELEASES = sorted(list(set(
-    i for l in client_matrix.LANG_RELEASE_MATRIX.values() for i in l)))
+    client_matrix.get_release_tag_name(info) for lang in client_matrix.LANG_RELEASE_MATRIX.values() for info in lang)))
 _TEST_TIMEOUT = 30
 
 argp = argparse.ArgumentParser(description='Run interop tests.')
@@ -93,10 +93,10 @@
   """
   # Find all defined releases.
   if args.release == 'all':
-    releases = ['master'] + client_matrix.LANG_RELEASE_MATRIX[lang]
+    releases = ['master'] + client_matrix.get_release_tags(lang)
   else:
     # Look for a particular release.
-    if args.release not in ['master'] + client_matrix.LANG_RELEASE_MATRIX[lang]:
+    if args.release not in ['master'] + client_matrix.get_release_tags(lang):
       jobset.message('SKIPPED',
                      '%s for %s is not defined' % (args.release, lang),
                      do_newline=True)
diff --git a/tools/interop_matrix/testcases/ruby__v1.0.1 b/tools/interop_matrix/testcases/ruby__v1.0.1
new file mode 100755
index 0000000..effbef1
--- /dev/null
+++ b/tools/interop_matrix/testcases/ruby__v1.0.1
@@ -0,0 +1,20 @@
+#!/bin/bash
+echo "Testing ${docker_image:=grpc_interop_ruby:6bd1f0eb-51a4-4ad8-861c-1cbd7a929f33}"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=large_unary"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=empty_unary"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=ping_pong"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=empty_stream"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=client_streaming"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=server_streaming"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=cancel_after_begin"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=cancel_after_first_response"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=timeout_on_sleeping_server"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=large_unary"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=empty_unary"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=ping_pong"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=empty_stream"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=client_streaming"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=server_streaming"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=cancel_after_begin"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=cancel_after_first_response"
+docker run -i --rm=true -w /var/local/git/grpc --net=host $docker_image bash -c "source /usr/local/rvm/scripts/rvm && ruby src/ruby/pb/test/client.rb --server_host=216.239.32.254 --server_host_override=grpc-test4.sandbox.googleapis.com --server_port=443 --use_tls=true --test_case=timeout_on_sleeping_server"
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index ae7ddb2..3958d8e 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -2896,6 +2896,23 @@
       "gpr", 
       "gpr_test_util", 
       "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c++", 
+    "name": "chttp2_settings_timeout_test", 
+    "src": [
+      "test/core/transport/chttp2/settings_timeout_test.cc"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
       "grpc++", 
       "grpc++_test_util", 
       "grpc_cli_libs", 
diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index ce698cb..6ffc7f4 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -3376,6 +3376,30 @@
     "flaky": false, 
     "gtest": true, 
     "language": "c++", 
+    "name": "chttp2_settings_timeout_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "uses_polling": true
+  }, 
+  {
+    "args": [], 
+    "benchmark": false, 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "gtest": true, 
+    "language": "c++", 
     "name": "cli_call_test", 
     "platforms": [
       "linux", 
diff --git a/tools/run_tests/python_utils/port_server.py b/tools/run_tests/python_utils/port_server.py
index 4fb5ca0..e8ac71a 100755
--- a/tools/run_tests/python_utils/port_server.py
+++ b/tools/run_tests/python_utils/port_server.py
@@ -57,6 +57,17 @@
 in_use = {}
 mu = threading.Lock()
 
+# Cronet restricts the following ports to be used (see
+# https://cs.chromium.org/chromium/src/net/base/port_util.cc). When one of these
+# ports is used in a Cronet test, the test would fail (see issue #12149). These
+# ports must be excluded from pool.
+cronet_restricted_ports = [1, 7, 9, 11, 13, 15, 17, 19, 20, 21, 22, 23, 25, 37,
+                           42, 43, 53, 77, 79, 87, 95, 101, 102, 103, 104, 109,
+                           110, 111, 113, 115, 117, 119, 123, 135, 139, 143,
+                           179, 389, 465, 512, 513, 514, 515, 526, 530, 531,
+                           532, 540, 556, 563, 587, 601, 636, 993, 995, 2049,
+                           3659, 4045, 6000, 6665, 6666, 6667, 6668, 6669, 6697]
+
 def can_connect(port):
   # this test is only really useful on unices where SO_REUSE_PORT is available
   # so on Windows, where this test is expensive, skip it
@@ -84,7 +95,7 @@
 
 def refill_pool(max_timeout, req):
   """Scan for ports not marked for being in use"""
-  chk = list(range(1025, 32766))
+  chk = [port for port in list(range(1025, 32766)) if port not in cronet_restricted_ports]
   random.shuffle(chk)
   for i in chk:
     if len(pool) > 100: break
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 766c1c0..471f5d9 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -1231,7 +1231,7 @@
       if test.flaky: flaky_tests.add(test.name)
       if test.cpu > 0: shortname_to_cpu[test.name] = test.cpu
   except:
-    print("Unexpected error getting flaky tests:", sys.exc_info()[0])
+    print("Unexpected error getting flaky tests: %s" % traceback.format_exc())
 
 if args.force_default_poller:
   _POLLING_STRATEGIES = {}