Merge pull request #11093 from ctiller/c++compat4

C++ compatibility fixes
diff --git a/BUILD b/BUILD
index 0a188a8..cc5fd3e 100644
--- a/BUILD
+++ b/BUILD
@@ -33,13 +33,19 @@
 
 exports_files(["LICENSE"])
 
-package(default_visibility = ["//visibility:public"])
+package(
+    default_visibility = ["//visibility:public"],
+    features = [
+        "-layering_check",
+        "-parse_headers",
+    ],
+)
 
 load(
     "//bazel:grpc_build_system.bzl",
     "grpc_cc_library",
     "grpc_proto_plugin",
-    "grpc_cc_libraries",
+    "grpc_generate_one_off_targets",
 )
 
 # This should be updated along with build.yaml
@@ -58,48 +64,35 @@
     ],
 )
 
-grpc_cc_libraries(
+grpc_cc_library(
+    name = "grpc_unsecure",
     srcs = [
         "src/core/lib/surface/init.c",
-    ],
-    additional_dep_list = [
-        [
-            "grpc_secure",
-            "grpc_resolver_dns_ares",
-            "grpc_lb_policy_grpclb_secure",
-            "grpc_transport_chttp2_client_secure",
-            "grpc_transport_chttp2_server_secure",
-        ],
-        [],
-    ],
-    additional_src_list = [
-        [
-            "src/core/plugin_registry/grpc_plugin_registry.c",
-        ],
-        [
-            "src/core/lib/surface/init_unsecure.c",
-            "src/core/plugin_registry/grpc_unsecure_plugin_registry.c",
-        ],
+        "src/core/lib/surface/init_unsecure.c",
+        "src/core/plugin_registry/grpc_unsecure_plugin_registry.c",
     ],
     language = "c",
-    name_list = [
-        "grpc",
-        "grpc_unsecure",
-    ],
     standalone = True,
     deps = [
-        "census",
-        "grpc_base",
-        "grpc_deadline_filter",
-        "grpc_lb_policy_pick_first",
-        "grpc_lb_policy_round_robin",
-        "grpc_load_reporting",
-        "grpc_max_age_filter",
-        "grpc_message_size_filter",
-        "grpc_resolver_dns_native",
-        "grpc_resolver_sockaddr",
-        "grpc_transport_chttp2_client_insecure",
-        "grpc_transport_chttp2_server_insecure",
+        "grpc_common",
+    ],
+)
+
+grpc_cc_library(
+    name = "grpc",
+    srcs = [
+        "src/core/lib/surface/init.c",
+        "src/core/plugin_registry/grpc_plugin_registry.c",
+    ],
+    language = "c",
+    standalone = True,
+    deps = [
+        "grpc_common",
+        "grpc_lb_policy_grpclb_secure",
+        "grpc_resolver_dns_ares",
+        "grpc_secure",
+        "grpc_transport_chttp2_client_secure",
+        "grpc_transport_chttp2_server_secure",
     ],
 )
 
@@ -457,7 +450,7 @@
 )
 
 grpc_cc_library(
-    name = "grpc_base",
+    name = "grpc_base_c",
     srcs = [
         "src/core/lib/channel/channel_args.c",
         "src/core/lib/channel/channel_stack.c",
@@ -479,13 +472,13 @@
         "src/core/lib/iomgr/endpoint_pair_windows.c",
         "src/core/lib/iomgr/error.c",
         "src/core/lib/iomgr/ev_epoll1_linux.c",
-        "src/core/lib/iomgr/ev_epollsig_linux.c",
-        "src/core/lib/iomgr/ev_epollex_linux.c",
-        "src/core/lib/iomgr/is_epollexclusive_available.c",
-        "src/core/lib/iomgr/ev_epoll_thread_pool_linux.c",
         "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c",
+        "src/core/lib/iomgr/ev_epoll_thread_pool_linux.c",
+        "src/core/lib/iomgr/ev_epollex_linux.c",
+        "src/core/lib/iomgr/ev_epollsig_linux.c",
         "src/core/lib/iomgr/ev_poll_posix.c",
         "src/core/lib/iomgr/ev_posix.c",
+        "src/core/lib/iomgr/ev_windows.c",
         "src/core/lib/iomgr/exec_ctx.c",
         "src/core/lib/iomgr/executor.c",
         "src/core/lib/iomgr/iocp_windows.c",
@@ -493,6 +486,7 @@
         "src/core/lib/iomgr/iomgr_posix.c",
         "src/core/lib/iomgr/iomgr_uv.c",
         "src/core/lib/iomgr/iomgr_windows.c",
+        "src/core/lib/iomgr/is_epollexclusive_available.c",
         "src/core/lib/iomgr/load_file.c",
         "src/core/lib/iomgr/lockfree_event.c",
         "src/core/lib/iomgr/network_status_tracker.c",
@@ -528,8 +522,8 @@
         "src/core/lib/iomgr/tcp_windows.c",
         "src/core/lib/iomgr/time_averaged_stats.c",
         "src/core/lib/iomgr/timer_generic.c",
-        "src/core/lib/iomgr/timer_manager.c",
         "src/core/lib/iomgr/timer_heap.c",
+        "src/core/lib/iomgr/timer_manager.c",
         "src/core/lib/iomgr/timer_uv.c",
         "src/core/lib/iomgr/udp_server.c",
         "src/core/lib/iomgr/unix_sockets_posix.c",
@@ -566,7 +560,6 @@
         "src/core/lib/surface/completion_queue.c",
         "src/core/lib/surface/completion_queue_factory.c",
         "src/core/lib/surface/event_string.c",
-        "src/core/lib/surface/lame_client.cc",
         "src/core/lib/surface/metadata_array.c",
         "src/core/lib/surface/server.c",
         "src/core/lib/surface/validate_metadata.c",
@@ -606,12 +599,10 @@
         "src/core/lib/iomgr/error.h",
         "src/core/lib/iomgr/error_internal.h",
         "src/core/lib/iomgr/ev_epoll1_linux.h",
-        "src/core/lib/iomgr/ev_epollsig_linux.h",
-        "src/core/lib/iomgr/ev_epollex_linux.h",
-        "src/core/lib/iomgr/is_epollexclusive_available.h",
-        "src/core/lib/iomgr/sys_epoll_wrapper.h",
-        "src/core/lib/iomgr/ev_epoll_thread_pool_linux.h",
         "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h",
+        "src/core/lib/iomgr/ev_epoll_thread_pool_linux.h",
+        "src/core/lib/iomgr/ev_epollex_linux.h",
+        "src/core/lib/iomgr/ev_epollsig_linux.h",
         "src/core/lib/iomgr/ev_poll_posix.h",
         "src/core/lib/iomgr/ev_posix.h",
         "src/core/lib/iomgr/exec_ctx.h",
@@ -620,6 +611,7 @@
         "src/core/lib/iomgr/iomgr.h",
         "src/core/lib/iomgr/iomgr_internal.h",
         "src/core/lib/iomgr/iomgr_posix.h",
+        "src/core/lib/iomgr/is_epollexclusive_available.h",
         "src/core/lib/iomgr/load_file.h",
         "src/core/lib/iomgr/lockfree_event.h",
         "src/core/lib/iomgr/network_status_tracker.h",
@@ -641,6 +633,7 @@
         "src/core/lib/iomgr/socket_utils.h",
         "src/core/lib/iomgr/socket_utils_posix.h",
         "src/core/lib/iomgr/socket_windows.h",
+        "src/core/lib/iomgr/sys_epoll_wrapper.h",
         "src/core/lib/iomgr/tcp_client.h",
         "src/core/lib/iomgr/tcp_client_posix.h",
         "src/core/lib/iomgr/tcp_posix.h",
@@ -651,8 +644,8 @@
         "src/core/lib/iomgr/time_averaged_stats.h",
         "src/core/lib/iomgr/timer.h",
         "src/core/lib/iomgr/timer_generic.h",
-        "src/core/lib/iomgr/timer_manager.h",
         "src/core/lib/iomgr/timer_heap.h",
+        "src/core/lib/iomgr/timer_manager.h",
         "src/core/lib/iomgr/timer_uv.h",
         "src/core/lib/iomgr/udp_server.h",
         "src/core/lib/iomgr/unix_sockets_posix.h",
@@ -714,6 +707,7 @@
         "include/grpc/slice.h",
         "include/grpc/slice_buffer.h",
         "include/grpc/status.h",
+        "include/grpc/support/workaround_list.h",
     ],
     deps = [
         "gpr_base",
@@ -723,6 +717,38 @@
 )
 
 grpc_cc_library(
+    name = "grpc_base",
+    srcs = [
+        "src/core/lib/surface/lame_client.cc",
+    ],
+    language = "c++",
+    deps = [
+        "grpc_base_c",
+    ],
+)
+
+grpc_cc_library(
+    name = "grpc_common",
+    deps = [
+        "grpc_base",
+        # standard plugins
+        "census",
+        "grpc_deadline_filter",
+        "grpc_lb_policy_pick_first",
+        "grpc_lb_policy_round_robin",
+        "grpc_load_reporting",
+        "grpc_max_age_filter",
+        "grpc_message_size_filter",
+        "grpc_resolver_dns_native",
+        "grpc_resolver_sockaddr",
+        "grpc_transport_chttp2_client_insecure",
+        "grpc_transport_chttp2_server_insecure",
+        "grpc_workaround_cronet_compression_filter",
+        "grpc_server_backward_compatibility",
+    ],
+)
+
+grpc_cc_library(
     name = "grpc_client_channel",
     srcs = [
         "src/core/ext/filters/client_channel/channel_connectivity.c",
@@ -835,6 +861,21 @@
 )
 
 grpc_cc_library(
+    name = "grpc_workaround_cronet_compression_filter",
+    srcs = [
+        "src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c",
+    ],
+    hdrs = [
+        "src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h",
+    ],
+    language = "c",
+    deps = [
+        "grpc_base",
+        "grpc_server_backward_compatibility",
+    ],
+)
+
+grpc_cc_library(
     name = "grpc_codegen",
     language = "c",
     public_hdrs = [
@@ -1260,111 +1301,124 @@
     ],
 )
 
-grpc_cc_libraries(
-    srcs = [
-        "src/cpp/client/channel_cc.cc",
-        "src/cpp/client/client_context.cc",
-        "src/cpp/client/create_channel.cc",
-        "src/cpp/client/create_channel_internal.cc",
-        "src/cpp/client/create_channel_posix.cc",
-        "src/cpp/client/credentials_cc.cc",
-        "src/cpp/client/generic_stub.cc",
-        "src/cpp/common/channel_arguments.cc",
-        "src/cpp/common/channel_filter.cc",
-        "src/cpp/common/completion_queue_cc.cc",
-        "src/cpp/common/core_codegen.cc",
-        "src/cpp/common/resource_quota_cc.cc",
-        "src/cpp/common/rpc_method.cc",
-        "src/cpp/common/version_cc.cc",
-        "src/cpp/server/async_generic_service.cc",
-        "src/cpp/server/channel_argument_option.cc",
-        "src/cpp/server/create_default_thread_pool.cc",
-        "src/cpp/server/dynamic_thread_pool.cc",
-        "src/cpp/server/health/default_health_check_service.cc",
-        "src/cpp/server/health/health.pb.c",
-        "src/cpp/server/health/health_check_service.cc",
-        "src/cpp/server/health/health_check_service_server_builder_option.cc",
-        "src/cpp/server/server_builder.cc",
-        "src/cpp/server/server_cc.cc",
-        "src/cpp/server/server_context.cc",
-        "src/cpp/server/server_credentials.cc",
-        "src/cpp/server/server_posix.cc",
-        "src/cpp/thread_manager/thread_manager.cc",
-        "src/cpp/util/byte_buffer_cc.cc",
-        "src/cpp/util/slice_cc.cc",
-        "src/cpp/util/status.cc",
-        "src/cpp/util/string_ref.cc",
-        "src/cpp/util/time_cc.cc",
-    ],
-    hdrs = [
-        "src/cpp/client/create_channel_internal.h",
-        "src/cpp/common/channel_filter.h",
-        "src/cpp/server/dynamic_thread_pool.h",
-        "src/cpp/server/health/default_health_check_service.h",
-        "src/cpp/server/health/health.pb.h",
-        "src/cpp/server/thread_pool_interface.h",
-        "src/cpp/thread_manager/thread_manager.h",
-    ],
-    additional_dep_list = [
-        ["grpc"],
-        ["grpc_unsecure"],
-    ],
+# TODO(ctiller): layer grpc atop grpc_unsecure, layer grpc++ atop grpc++_unsecure
+GRPCXX_SRCS = [
+    "src/cpp/client/channel_cc.cc",
+    "src/cpp/client/client_context.cc",
+    "src/cpp/client/create_channel.cc",
+    "src/cpp/client/create_channel_internal.cc",
+    "src/cpp/client/create_channel_posix.cc",
+    "src/cpp/client/credentials_cc.cc",
+    "src/cpp/client/generic_stub.cc",
+    "src/cpp/common/channel_arguments.cc",
+    "src/cpp/common/channel_filter.cc",
+    "src/cpp/common/completion_queue_cc.cc",
+    "src/cpp/common/core_codegen.cc",
+    "src/cpp/common/resource_quota_cc.cc",
+    "src/cpp/common/rpc_method.cc",
+    "src/cpp/common/version_cc.cc",
+    "src/cpp/server/async_generic_service.cc",
+    "src/cpp/server/channel_argument_option.cc",
+    "src/cpp/server/create_default_thread_pool.cc",
+    "src/cpp/server/dynamic_thread_pool.cc",
+    "src/cpp/server/health/default_health_check_service.cc",
+    "src/cpp/server/health/health.pb.c",
+    "src/cpp/server/health/health_check_service.cc",
+    "src/cpp/server/health/health_check_service_server_builder_option.cc",
+    "src/cpp/server/server_builder.cc",
+    "src/cpp/server/server_cc.cc",
+    "src/cpp/server/server_context.cc",
+    "src/cpp/server/server_credentials.cc",
+    "src/cpp/server/server_posix.cc",
+    "src/cpp/thread_manager/thread_manager.cc",
+    "src/cpp/util/byte_buffer_cc.cc",
+    "src/cpp/util/slice_cc.cc",
+    "src/cpp/util/status.cc",
+    "src/cpp/util/string_ref.cc",
+    "src/cpp/util/time_cc.cc",
+]
+
+GRPCXX_HDRS = [
+    "src/cpp/client/create_channel_internal.h",
+    "src/cpp/common/channel_filter.h",
+    "src/cpp/server/dynamic_thread_pool.h",
+    "src/cpp/server/health/default_health_check_service.h",
+    "src/cpp/server/health/health.pb.h",
+    "src/cpp/server/thread_pool_interface.h",
+    "src/cpp/thread_manager/thread_manager.h",
+]
+
+GRPCXX_PUBLIC_HDRS = [
+    "include/grpc++/alarm.h",
+    "include/grpc++/channel.h",
+    "include/grpc++/client_context.h",
+    "include/grpc++/completion_queue.h",
+    "include/grpc++/create_channel.h",
+    "include/grpc++/create_channel_posix.h",
+    "include/grpc++/ext/health_check_service_server_builder_option.h",
+    "include/grpc++/generic/async_generic_service.h",
+    "include/grpc++/generic/generic_stub.h",
+    "include/grpc++/grpc++.h",
+    "include/grpc++/health_check_service_interface.h",
+    "include/grpc++/impl/call.h",
+    "include/grpc++/impl/channel_argument_option.h",
+    "include/grpc++/impl/client_unary_call.h",
+    "include/grpc++/impl/codegen/core_codegen.h",
+    "include/grpc++/impl/grpc_library.h",
+    "include/grpc++/impl/method_handler_impl.h",
+    "include/grpc++/impl/rpc_method.h",
+    "include/grpc++/impl/rpc_service_method.h",
+    "include/grpc++/impl/serialization_traits.h",
+    "include/grpc++/impl/server_builder_option.h",
+    "include/grpc++/impl/server_builder_plugin.h",
+    "include/grpc++/impl/server_initializer.h",
+    "include/grpc++/impl/service_type.h",
+    "include/grpc++/impl/sync_cxx11.h",
+    "include/grpc++/impl/sync_no_cxx11.h",
+    "include/grpc++/resource_quota.h",
+    "include/grpc++/security/auth_context.h",
+    "include/grpc++/security/auth_metadata_processor.h",
+    "include/grpc++/security/credentials.h",
+    "include/grpc++/security/server_credentials.h",
+    "include/grpc++/server.h",
+    "include/grpc++/server_builder.h",
+    "include/grpc++/server_context.h",
+    "include/grpc++/server_posix.h",
+    "include/grpc++/support/async_stream.h",
+    "include/grpc++/support/async_unary_call.h",
+    "include/grpc++/support/byte_buffer.h",
+    "include/grpc++/support/channel_arguments.h",
+    "include/grpc++/support/config.h",
+    "include/grpc++/support/slice.h",
+    "include/grpc++/support/status.h",
+    "include/grpc++/support/status_code_enum.h",
+    "include/grpc++/support/string_ref.h",
+    "include/grpc++/support/stub_options.h",
+    "include/grpc++/support/sync_stream.h",
+    "include/grpc++/support/time.h",
+]
+
+grpc_cc_library(
+    name = "grpc++_base",
+    srcs = GRPCXX_SRCS,
+    hdrs = GRPCXX_HDRS,
     language = "c++",
-    name_list = [
-        "grpc++_base",
-        "grpc++_base_unsecure",
+    public_hdrs = GRPCXX_PUBLIC_HDRS,
+    deps = [
+        "grpc",
+        "grpc++_codegen_base",
     ],
-    public_hdrs = [
-        "include/grpc++/alarm.h",
-        "include/grpc++/channel.h",
-        "include/grpc++/client_context.h",
-        "include/grpc++/completion_queue.h",
-        "include/grpc++/create_channel.h",
-        "include/grpc++/create_channel_posix.h",
-        "include/grpc++/ext/health_check_service_server_builder_option.h",
-        "include/grpc++/generic/async_generic_service.h",
-        "include/grpc++/generic/generic_stub.h",
-        "include/grpc++/grpc++.h",
-        "include/grpc++/health_check_service_interface.h",
-        "include/grpc++/impl/call.h",
-        "include/grpc++/impl/channel_argument_option.h",
-        "include/grpc++/impl/client_unary_call.h",
-        "include/grpc++/impl/codegen/core_codegen.h",
-        "include/grpc++/impl/grpc_library.h",
-        "include/grpc++/impl/method_handler_impl.h",
-        "include/grpc++/impl/rpc_method.h",
-        "include/grpc++/impl/rpc_service_method.h",
-        "include/grpc++/impl/serialization_traits.h",
-        "include/grpc++/impl/server_builder_option.h",
-        "include/grpc++/impl/server_builder_plugin.h",
-        "include/grpc++/impl/server_initializer.h",
-        "include/grpc++/impl/service_type.h",
-        "include/grpc++/impl/sync_cxx11.h",
-        "include/grpc++/impl/sync_no_cxx11.h",
-        "include/grpc++/resource_quota.h",
-        "include/grpc++/security/auth_context.h",
-        "include/grpc++/security/auth_metadata_processor.h",
-        "include/grpc++/security/credentials.h",
-        "include/grpc++/security/server_credentials.h",
-        "include/grpc++/server.h",
-        "include/grpc++/server_builder.h",
-        "include/grpc++/server_context.h",
-        "include/grpc++/server_posix.h",
-        "include/grpc++/support/async_stream.h",
-        "include/grpc++/support/async_unary_call.h",
-        "include/grpc++/support/byte_buffer.h",
-        "include/grpc++/support/channel_arguments.h",
-        "include/grpc++/support/config.h",
-        "include/grpc++/support/slice.h",
-        "include/grpc++/support/status.h",
-        "include/grpc++/support/status_code_enum.h",
-        "include/grpc++/support/string_ref.h",
-        "include/grpc++/support/stub_options.h",
-        "include/grpc++/support/sync_stream.h",
-        "include/grpc++/support/time.h",
-    ],
+)
+
+grpc_cc_library(
+    name = "grpc++_base_unsecure",
+    srcs = GRPCXX_SRCS,
+    hdrs = GRPCXX_HDRS,
+    language = "c++",
+    public_hdrs = GRPCXX_PUBLIC_HDRS,
     deps = [
         "grpc++_codegen_base",
+        "grpc_unsecure",
     ],
 )
 
@@ -1459,3 +1513,30 @@
         "//src/proto/grpc/reflection/v1alpha:reflection_proto",
     ],
 )
+
+grpc_cc_library(
+    name = "grpc++_test",
+    public_hdrs = [
+        "include/grpc++/test/mock_stream.h",
+        "include/grpc++/test/server_context_test_spouse.h",
+    ],
+    deps = [
+        ":grpc++",
+    ],
+)
+
+grpc_cc_library(
+    name = "grpc_server_backward_compatibility",
+    srcs = [
+        "src/core/ext/filters/workarounds/workaround_utils.c",
+    ],
+    hdrs = [
+        "src/core/ext/filters/workarounds/workaround_utils.h",
+    ],
+    language = "c",
+    deps = [
+        "grpc_base",
+    ],
+)
+
+grpc_generate_one_off_targets()
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 93f8393..d10c040 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -563,6 +563,7 @@
 add_dependencies(buildtests_c h2_full+pipe_test)
 endif()
 add_dependencies(buildtests_c h2_full+trace_test)
+add_dependencies(buildtests_c h2_full+workarounds_test)
 add_dependencies(buildtests_c h2_http_proxy_test)
 add_dependencies(buildtests_c h2_load_reporting_test)
 add_dependencies(buildtests_c h2_oauth2_test)
@@ -586,6 +587,7 @@
 add_dependencies(buildtests_c h2_full+pipe_nosec_test)
 endif()
 add_dependencies(buildtests_c h2_full+trace_nosec_test)
+add_dependencies(buildtests_c h2_full+workarounds_nosec_test)
 add_dependencies(buildtests_c h2_http_proxy_nosec_test)
 add_dependencies(buildtests_c h2_load_reporting_nosec_test)
 add_dependencies(buildtests_c h2_proxy_nosec_test)
@@ -945,6 +947,7 @@
   src/core/lib/iomgr/ev_epollsig_linux.c
   src/core/lib/iomgr/ev_poll_posix.c
   src/core/lib/iomgr/ev_posix.c
+  src/core/lib/iomgr/ev_windows.c
   src/core/lib/iomgr/exec_ctx.c
   src/core/lib/iomgr/executor.c
   src/core/lib/iomgr/iocp_windows.c
@@ -1162,6 +1165,8 @@
   src/core/ext/census/tracing.c
   src/core/ext/filters/max_age/max_age_filter.c
   src/core/ext/filters/message_size/message_size_filter.c
+  src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c
+  src/core/ext/filters/workarounds/workaround_utils.c
   src/core/plugin_registry/grpc_plugin_registry.c
 )
 
@@ -1212,6 +1217,7 @@
   include/grpc/slice.h
   include/grpc/slice_buffer.h
   include/grpc/status.h
+  include/grpc/support/workaround_list.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -1279,6 +1285,7 @@
   src/core/lib/iomgr/ev_epollsig_linux.c
   src/core/lib/iomgr/ev_poll_posix.c
   src/core/lib/iomgr/ev_posix.c
+  src/core/lib/iomgr/ev_windows.c
   src/core/lib/iomgr/exec_ctx.c
   src/core/lib/iomgr/executor.c
   src/core/lib/iomgr/iocp_windows.c
@@ -1509,6 +1516,7 @@
   include/grpc/slice.h
   include/grpc/slice_buffer.h
   include/grpc/status.h
+  include/grpc/support/workaround_list.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -1596,6 +1604,7 @@
   src/core/lib/iomgr/ev_epollsig_linux.c
   src/core/lib/iomgr/ev_poll_posix.c
   src/core/lib/iomgr/ev_posix.c
+  src/core/lib/iomgr/ev_windows.c
   src/core/lib/iomgr/exec_ctx.c
   src/core/lib/iomgr/executor.c
   src/core/lib/iomgr/iocp_windows.c
@@ -1743,6 +1752,7 @@
   include/grpc/slice.h
   include/grpc/slice_buffer.h
   include/grpc/status.h
+  include/grpc/support/workaround_list.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -1858,6 +1868,7 @@
   src/core/lib/iomgr/ev_epollsig_linux.c
   src/core/lib/iomgr/ev_poll_posix.c
   src/core/lib/iomgr/ev_posix.c
+  src/core/lib/iomgr/ev_windows.c
   src/core/lib/iomgr/exec_ctx.c
   src/core/lib/iomgr/executor.c
   src/core/lib/iomgr/iocp_windows.c
@@ -2045,6 +2056,8 @@
   src/core/ext/census/tracing.c
   src/core/ext/filters/max_age/max_age_filter.c
   src/core/ext/filters/message_size/message_size_filter.c
+  src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c
+  src/core/ext/filters/workarounds/workaround_utils.c
   src/core/plugin_registry/grpc_unsecure_plugin_registry.c
 )
 
@@ -2092,6 +2105,7 @@
   include/grpc/slice.h
   include/grpc/slice_buffer.h
   include/grpc/status.h
+  include/grpc/support/workaround_list.h
   include/grpc/impl/codegen/byte_buffer_reader.h
   include/grpc/impl/codegen/compression_types.h
   include/grpc/impl/codegen/connectivity_state.h
@@ -2285,6 +2299,7 @@
   src/core/lib/iomgr/ev_epollsig_linux.c
   src/core/lib/iomgr/ev_poll_posix.c
   src/core/lib/iomgr/ev_posix.c
+  src/core/lib/iomgr/ev_windows.c
   src/core/lib/iomgr/exec_ctx.c
   src/core/lib/iomgr/executor.c
   src/core/lib/iomgr/iocp_windows.c
@@ -2532,6 +2547,7 @@
   include/grpc/slice.h
   include/grpc/slice_buffer.h
   include/grpc/status.h
+  include/grpc/support/workaround_list.h
   include/grpc++/impl/codegen/proto_utils.h
   include/grpc++/impl/codegen/config_protobuf.h
 )
@@ -2616,6 +2632,7 @@
   src/core/lib/iomgr/ev_epollsig_linux.c
   src/core/lib/iomgr/ev_poll_posix.c
   src/core/lib/iomgr/ev_posix.c
+  src/core/lib/iomgr/ev_windows.c
   src/core/lib/iomgr/exec_ctx.c
   src/core/lib/iomgr/executor.c
   src/core/lib/iomgr/iocp_windows.c
@@ -2930,6 +2947,7 @@
   include/grpc/slice.h
   include/grpc/slice_buffer.h
   include/grpc/status.h
+  include/grpc/support/workaround_list.h
   include/grpc/census.h
 )
   string(REPLACE "include/" "" _path ${_hdr})
@@ -3391,6 +3409,7 @@
   src/core/lib/iomgr/ev_epollsig_linux.c
   src/core/lib/iomgr/ev_poll_posix.c
   src/core/lib/iomgr/ev_posix.c
+  src/core/lib/iomgr/ev_windows.c
   src/core/lib/iomgr/exec_ctx.c
   src/core/lib/iomgr/executor.c
   src/core/lib/iomgr/iocp_windows.c
@@ -3637,6 +3656,7 @@
   include/grpc/slice.h
   include/grpc/slice_buffer.h
   include/grpc/status.h
+  include/grpc/support/workaround_list.h
 )
   string(REPLACE "include/" "" _path ${_hdr})
   get_filename_component(_path ${_path} PATH)
@@ -4578,6 +4598,7 @@
   test/core/end2end/tests/simple_request.c
   test/core/end2end/tests/streaming_error_response.c
   test/core/end2end/tests/trailing_metadata.c
+  test/core/end2end/tests/workaround_cronet_compression.c
   test/core/end2end/tests/write_buffering.c
   test/core/end2end/tests/write_buffering_at_end.c
 )
@@ -4675,6 +4696,7 @@
   test/core/end2end/tests/simple_request.c
   test/core/end2end/tests/streaming_error_response.c
   test/core/end2end/tests/trailing_metadata.c
+  test/core/end2end/tests/workaround_cronet_compression.c
   test/core/end2end/tests/write_buffering.c
   test/core/end2end/tests/write_buffering_at_end.c
 )
@@ -13129,6 +13151,38 @@
 endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
 
+add_executable(h2_full+workarounds_test
+  test/core/end2end/fixtures/h2_full+workarounds.c
+)
+
+
+target_include_directories(h2_full+workarounds_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_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+)
+
+target_link_libraries(h2_full+workarounds_test
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  end2end_tests
+  grpc_test_util
+  grpc
+  gpr_test_util
+  gpr
+)
+
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+
 add_executable(h2_http_proxy_test
   test/core/end2end/fixtures/h2_http_proxy.c
 )
@@ -13679,6 +13733,38 @@
 endif (gRPC_BUILD_TESTS)
 if (gRPC_BUILD_TESTS)
 
+add_executable(h2_full+workarounds_nosec_test
+  test/core/end2end/fixtures/h2_full+workarounds.c
+)
+
+
+target_include_directories(h2_full+workarounds_nosec_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_BUILD_INCLUDE_DIR}
+  PRIVATE ${CARES_INCLUDE_DIR}
+  PRIVATE ${CARES_PLATFORM_INCLUDE_DIR}
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares
+  PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include
+)
+
+target_link_libraries(h2_full+workarounds_nosec_test
+  ${_gRPC_ALLTARGETS_LIBRARIES}
+  end2end_nosec_tests
+  grpc_test_util_unsecure
+  grpc_unsecure
+  gpr_test_util
+  gpr
+)
+
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+
 add_executable(h2_http_proxy_nosec_test
   test/core/end2end/fixtures/h2_http_proxy.c
 )
diff --git a/Makefile b/Makefile
index 5a5617e..e6dd66e 100644
--- a/Makefile
+++ b/Makefile
@@ -1249,6 +1249,7 @@
 h2_full_test: $(BINDIR)/$(CONFIG)/h2_full_test
 h2_full+pipe_test: $(BINDIR)/$(CONFIG)/h2_full+pipe_test
 h2_full+trace_test: $(BINDIR)/$(CONFIG)/h2_full+trace_test
+h2_full+workarounds_test: $(BINDIR)/$(CONFIG)/h2_full+workarounds_test
 h2_http_proxy_test: $(BINDIR)/$(CONFIG)/h2_http_proxy_test
 h2_load_reporting_test: $(BINDIR)/$(CONFIG)/h2_load_reporting_test
 h2_oauth2_test: $(BINDIR)/$(CONFIG)/h2_oauth2_test
@@ -1266,6 +1267,7 @@
 h2_full_nosec_test: $(BINDIR)/$(CONFIG)/h2_full_nosec_test
 h2_full+pipe_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+pipe_nosec_test
 h2_full+trace_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+trace_nosec_test
+h2_full+workarounds_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+workarounds_nosec_test
 h2_http_proxy_nosec_test: $(BINDIR)/$(CONFIG)/h2_http_proxy_nosec_test
 h2_load_reporting_nosec_test: $(BINDIR)/$(CONFIG)/h2_load_reporting_nosec_test
 h2_proxy_nosec_test: $(BINDIR)/$(CONFIG)/h2_proxy_nosec_test
@@ -1494,6 +1496,7 @@
   $(BINDIR)/$(CONFIG)/h2_full_test \
   $(BINDIR)/$(CONFIG)/h2_full+pipe_test \
   $(BINDIR)/$(CONFIG)/h2_full+trace_test \
+  $(BINDIR)/$(CONFIG)/h2_full+workarounds_test \
   $(BINDIR)/$(CONFIG)/h2_http_proxy_test \
   $(BINDIR)/$(CONFIG)/h2_load_reporting_test \
   $(BINDIR)/$(CONFIG)/h2_oauth2_test \
@@ -1511,6 +1514,7 @@
   $(BINDIR)/$(CONFIG)/h2_full_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_full+pipe_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_full+trace_nosec_test \
+  $(BINDIR)/$(CONFIG)/h2_full+workarounds_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_http_proxy_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_load_reporting_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_proxy_nosec_test \
@@ -2920,6 +2924,7 @@
     src/core/lib/iomgr/ev_epollsig_linux.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/ev_windows.c \
     src/core/lib/iomgr/exec_ctx.c \
     src/core/lib/iomgr/executor.c \
     src/core/lib/iomgr/iocp_windows.c \
@@ -3137,6 +3142,8 @@
     src/core/ext/census/tracing.c \
     src/core/ext/filters/max_age/max_age_filter.c \
     src/core/ext/filters/message_size/message_size_filter.c \
+    src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c \
+    src/core/ext/filters/workarounds/workaround_utils.c \
     src/core/plugin_registry/grpc_plugin_registry.c \
 
 PUBLIC_HEADERS_C += \
@@ -3150,6 +3157,7 @@
     include/grpc/slice.h \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
+    include/grpc/support/workaround_list.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -3252,6 +3260,7 @@
     src/core/lib/iomgr/ev_epollsig_linux.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/ev_windows.c \
     src/core/lib/iomgr/exec_ctx.c \
     src/core/lib/iomgr/executor.c \
     src/core/lib/iomgr/iocp_windows.c \
@@ -3447,6 +3456,7 @@
     include/grpc/slice.h \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
+    include/grpc/support/workaround_list.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -3568,6 +3578,7 @@
     src/core/lib/iomgr/ev_epollsig_linux.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/ev_windows.c \
     src/core/lib/iomgr/exec_ctx.c \
     src/core/lib/iomgr/executor.c \
     src/core/lib/iomgr/iocp_windows.c \
@@ -3680,6 +3691,7 @@
     include/grpc/slice.h \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
+    include/grpc/support/workaround_list.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -3802,6 +3814,7 @@
     src/core/lib/iomgr/ev_epollsig_linux.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/ev_windows.c \
     src/core/lib/iomgr/exec_ctx.c \
     src/core/lib/iomgr/executor.c \
     src/core/lib/iomgr/iocp_windows.c \
@@ -3989,6 +4002,8 @@
     src/core/ext/census/tracing.c \
     src/core/ext/filters/max_age/max_age_filter.c \
     src/core/ext/filters/message_size/message_size_filter.c \
+    src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c \
+    src/core/ext/filters/workarounds/workaround_utils.c \
     src/core/plugin_registry/grpc_unsecure_plugin_registry.c \
 
 PUBLIC_HEADERS_C += \
@@ -4002,6 +4017,7 @@
     include/grpc/slice.h \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
+    include/grpc/support/workaround_list.h \
     include/grpc/impl/codegen/byte_buffer_reader.h \
     include/grpc/impl/codegen/compression_types.h \
     include/grpc/impl/codegen/connectivity_state.h \
@@ -4206,6 +4222,7 @@
     src/core/lib/iomgr/ev_epollsig_linux.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/ev_windows.c \
     src/core/lib/iomgr/exec_ctx.c \
     src/core/lib/iomgr/executor.c \
     src/core/lib/iomgr/iocp_windows.c \
@@ -4415,6 +4432,7 @@
     include/grpc/slice.h \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
+    include/grpc/support/workaround_list.h \
     include/grpc++/impl/codegen/proto_utils.h \
     include/grpc++/impl/codegen/config_protobuf.h \
 
@@ -4545,6 +4563,7 @@
     src/core/lib/iomgr/ev_epollsig_linux.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/ev_windows.c \
     src/core/lib/iomgr/exec_ctx.c \
     src/core/lib/iomgr/executor.c \
     src/core/lib/iomgr/iocp_windows.c \
@@ -4821,6 +4840,7 @@
     include/grpc/slice.h \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
+    include/grpc/support/workaround_list.h \
     include/grpc/census.h \
 
 LIBGRPC++_CRONET_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_CRONET_SRC))))
@@ -5310,6 +5330,7 @@
     src/core/lib/iomgr/ev_epollsig_linux.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/ev_windows.c \
     src/core/lib/iomgr/exec_ctx.c \
     src/core/lib/iomgr/executor.c \
     src/core/lib/iomgr/iocp_windows.c \
@@ -5519,6 +5540,7 @@
     include/grpc/slice.h \
     include/grpc/slice_buffer.h \
     include/grpc/status.h \
+    include/grpc/support/workaround_list.h \
 
 LIBGRPC++_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_UNSECURE_SRC))))
 
@@ -8466,6 +8488,7 @@
     test/core/end2end/tests/simple_request.c \
     test/core/end2end/tests/streaming_error_response.c \
     test/core/end2end/tests/trailing_metadata.c \
+    test/core/end2end/tests/workaround_cronet_compression.c \
     test/core/end2end/tests/write_buffering.c \
     test/core/end2end/tests/write_buffering_at_end.c \
 
@@ -8558,6 +8581,7 @@
     test/core/end2end/tests/simple_request.c \
     test/core/end2end/tests/streaming_error_response.c \
     test/core/end2end/tests/trailing_metadata.c \
+    test/core/end2end/tests/workaround_cronet_compression.c \
     test/core/end2end/tests/write_buffering.c \
     test/core/end2end/tests/write_buffering_at_end.c \
 
@@ -18603,6 +18627,38 @@
 endif
 
 
+H2_FULL+WORKAROUNDS_TEST_SRC = \
+    test/core/end2end/fixtures/h2_full+workarounds.c \
+
+H2_FULL+WORKAROUNDS_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(H2_FULL+WORKAROUNDS_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/h2_full+workarounds_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/h2_full+workarounds_test: $(H2_FULL+WORKAROUNDS_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(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) $(LD) $(LDFLAGS) $(H2_FULL+WORKAROUNDS_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/h2_full+workarounds_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/end2end/fixtures/h2_full+workarounds.o:  $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_h2_full+workarounds_test: $(H2_FULL+WORKAROUNDS_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(H2_FULL+WORKAROUNDS_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 H2_HTTP_PROXY_TEST_SRC = \
     test/core/end2end/fixtures/h2_http_proxy.c \
 
@@ -19075,6 +19131,26 @@
 endif
 
 
+H2_FULL+WORKAROUNDS_NOSEC_TEST_SRC = \
+    test/core/end2end/fixtures/h2_full+workarounds.c \
+
+H2_FULL+WORKAROUNDS_NOSEC_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(H2_FULL+WORKAROUNDS_NOSEC_TEST_SRC))))
+
+
+$(BINDIR)/$(CONFIG)/h2_full+workarounds_nosec_test: $(H2_FULL+WORKAROUNDS_NOSEC_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(H2_FULL+WORKAROUNDS_NOSEC_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) -o $(BINDIR)/$(CONFIG)/h2_full+workarounds_nosec_test
+
+$(OBJDIR)/$(CONFIG)/test/core/end2end/fixtures/h2_full+workarounds.o:  $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_h2_full+workarounds_nosec_test: $(H2_FULL+WORKAROUNDS_NOSEC_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_DEPS),true)
+-include $(H2_FULL+WORKAROUNDS_NOSEC_TEST_OBJS:.o=.dep)
+endif
+
+
 H2_HTTP_PROXY_NOSEC_TEST_SRC = \
     test/core/end2end/fixtures/h2_http_proxy.c \
 
diff --git a/WORKSPACE b/WORKSPACE
index a78a889..82ea99f 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -5,7 +5,7 @@
 
 bind(
     name = "libssl",
-    actual = "@submodule_boringssl//:ssl",
+    actual = "@boringssl//:ssl",
 )
 
 bind(
@@ -49,7 +49,7 @@
 )
 
 local_repository(
-    name = "submodule_boringssl",
+    name = "boringssl",
     path = "third_party/boringssl-with-bazel",
 )
 
diff --git a/bazel/grpc_build_system.bzl b/bazel/grpc_build_system.bzl
index a104fa0..0f66edb 100644
--- a/bazel/grpc_build_system.bzl
+++ b/bazel/grpc_build_system.bzl
@@ -32,8 +32,15 @@
 # the BUILD file for gRPC. It contains the mapping for the template system we
 # use to generate other platform's build system files.
 #
+# Please consider that there should be a high bar for additions and changes to
+# this file.
+# Each rule listed must be re-written for Google's internal build system, and
+# each change must be ported from one to the other.
+#
 
-def grpc_cc_library(name, srcs = [], public_hdrs = [], hdrs = [], external_deps = [], deps = [], standalone = False, language = "C++"):
+def grpc_cc_library(name, srcs = [], public_hdrs = [], hdrs = [],
+                    external_deps = [], deps = [], standalone = False,
+                    language = "C++", testonly = False, visibility = None):
   copts = []
   if language.upper() == "C":
     copts = ["-std=c99"]
@@ -43,28 +50,14 @@
     hdrs = hdrs + public_hdrs,
     deps = deps + ["//external:" + dep for dep in external_deps],
     copts = copts,
+    visibility = visibility,
+    testonly = testonly,
     linkopts = ["-pthread"],
     includes = [
         "include"
     ]
   )
 
-def grpc_cc_libraries(name_list, additional_src_list = [], additional_dep_list = [], srcs = [], public_hdrs = [], hdrs = [], external_deps = [], deps = [], standalone = False, language="C++"):
-  names = len(name_list)
-  asl = additional_src_list + [[]]*(names - len(additional_src_list))
-  adl = additional_dep_list + [[]]*(names - len(additional_dep_list))
-  for i in range(names):
-    grpc_cc_library(
-      name = name_list[i],
-      srcs = srcs + asl[i],
-      hdrs = hdrs,
-      public_hdrs = public_hdrs,
-      deps = deps + adl[i],
-      external_deps = external_deps,
-      standalone = standalone,
-      language = language
-    )
-
 def grpc_proto_plugin(name, srcs = [], deps = []):
   native.cc_binary(
     name = name,
@@ -86,3 +79,42 @@
     generate_mock = generate_mock,
   )
 
+def grpc_cc_test(name, srcs = [], deps = [], external_deps = [], args = [], data = [], language = "C++"):
+  copts = []
+  if language.upper() == "C":
+    copts = ["-std=c99"]
+  native.cc_test(
+    name = name,
+    srcs = srcs,
+    args = args,
+    data = data,
+    deps = deps + ["//external:" + dep for dep in external_deps],
+    copts = copts,
+    linkopts = ["-pthread"],
+  )
+
+def grpc_cc_binary(name, srcs = [], deps = [], external_deps = [], args = [], data = [], language = "C++", testonly = False, linkshared = False):
+  copts = []
+  if language.upper() == "C":
+    copts = ["-std=c99"]
+  native.cc_binary(
+    name = name,
+    srcs = srcs,
+    args = args,
+    data = data,
+    testonly = testonly,
+    linkshared = linkshared,
+    deps = deps + ["//external:" + dep for dep in external_deps],
+    copts = copts,
+    linkopts = ["-pthread"],
+  )
+
+def grpc_generate_one_off_targets():
+    pass
+
+def grpc_sh_test(name, srcs, args = [], data = []):
+    native.sh_test(
+        name = name,
+        srcs = srcs,
+        args = args,
+        data = data)
diff --git a/binding.gyp b/binding.gyp
index c47cd00..8aafdaa 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -680,6 +680,7 @@
         'src/core/lib/iomgr/ev_epollsig_linux.c',
         'src/core/lib/iomgr/ev_poll_posix.c',
         'src/core/lib/iomgr/ev_posix.c',
+        'src/core/lib/iomgr/ev_windows.c',
         'src/core/lib/iomgr/exec_ctx.c',
         'src/core/lib/iomgr/executor.c',
         'src/core/lib/iomgr/iocp_windows.c',
@@ -897,6 +898,8 @@
         'src/core/ext/census/tracing.c',
         'src/core/ext/filters/max_age/max_age_filter.c',
         'src/core/ext/filters/message_size/message_size_filter.c',
+        'src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c',
+        'src/core/ext/filters/workarounds/workaround_utils.c',
         'src/core/plugin_registry/grpc_plugin_registry.c',
       ],
       "conditions": [
diff --git a/build.yaml b/build.yaml
index a883229..ecd9ebe 100644
--- a/build.yaml
+++ b/build.yaml
@@ -176,6 +176,7 @@
   - include/grpc/slice.h
   - include/grpc/slice_buffer.h
   - include/grpc/status.h
+  - include/grpc/support/workaround_list.h
   headers:
   - src/core/lib/channel/channel_args.h
   - src/core/lib/channel/channel_stack.h
@@ -316,6 +317,7 @@
   - src/core/lib/iomgr/ev_epollsig_linux.c
   - src/core/lib/iomgr/ev_poll_posix.c
   - src/core/lib/iomgr/ev_posix.c
+  - src/core/lib/iomgr/ev_windows.c
   - src/core/lib/iomgr/exec_ctx.c
   - src/core/lib/iomgr/executor.c
   - src/core/lib/iomgr/iocp_windows.c
@@ -658,6 +660,13 @@
   - grpc_base
   - grpc_transport_chttp2_alpn
   - tsi
+- name: grpc_server_backward_compatibility
+  headers:
+  - src/core/ext/filters/workarounds/workaround_utils.h
+  src:
+  - src/core/ext/filters/workarounds/workaround_utils.c
+  uses:
+  - grpc_base
 - name: grpc_test_util_base
   build: test
   headers:
@@ -824,6 +833,15 @@
   - grpc_base
   - grpc_transport_chttp2
   - grpc_http_filters
+- name: grpc_workaround_cronet_compression_filter
+  headers:
+  - src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h
+  src:
+  - src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c
+  plugin: grpc_workaround_cronet_compression_filter
+  uses:
+  - grpc_base
+  - grpc_server_backward_compatibility
 - name: nanopb
   headers:
   - third_party/nanopb/pb.h
@@ -1053,6 +1071,8 @@
   - grpc_max_age_filter
   - grpc_message_size_filter
   - grpc_deadline_filter
+  - grpc_workaround_cronet_compression_filter
+  - grpc_server_backward_compatibility
   generate_plugin_registry: true
   secure: true
   vs_packages:
@@ -1152,6 +1172,8 @@
   - grpc_max_age_filter
   - grpc_message_size_filter
   - grpc_deadline_filter
+  - grpc_workaround_cronet_compression_filter
+  - grpc_server_backward_compatibility
   generate_plugin_registry: true
   secure: false
   vs_project_guid: '{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}'
@@ -3343,7 +3365,7 @@
   - gpr_test_util
   - gpr
   args:
-  - --benchmark_min_time=0
+  - --benchmark_min_time=4
   defaults: benchmark
   platforms:
   - mac
@@ -4581,6 +4603,7 @@
   - src/node/src/client.js
   - src/node/src/common.js
   - src/node/src/credentials.js
+  - src/node/src/constants.js
   - src/node/src/grpc_extension.js
   - src/node/src/metadata.js
   - src/node/src/server.js
@@ -4605,7 +4628,6 @@
   deps:
   - grpc
   - gpr
-  - ares
   - boringssl
   headers:
   - src/php/ext/grpc/byte_buffer.h
@@ -4619,6 +4641,7 @@
   - src/php/ext/grpc/server.h
   - src/php/ext/grpc/server_credentials.h
   - src/php/ext/grpc/timeval.h
+  - src/php/ext/grpc/version.h
   src:
   - src/php/ext/grpc/byte_buffer.c
   - src/php/ext/grpc/call.c
diff --git a/composer.json b/composer.json
index 284b57a..2cf3f17 100644
--- a/composer.json
+++ b/composer.json
@@ -6,12 +6,15 @@
   "homepage": "http://grpc.io",
   "license": "BSD-3-Clause",
   "require": {
-    "php": ">=5.5.0",
-    "google/protobuf": "^v3.3.0"
+    "php": ">=5.5.0"
   },
   "require-dev": {
     "google/auth": "v0.9"
   },
+  "suggest": {
+    "ext-protobuf": "For better performance, install the protobuf C extension.",
+    "google/protobuf": "To get started using grpc quickly, install the native protobuf library."
+  },
   "autoload": {
     "psr-4": {
       "Grpc\\": "src/php/lib/Grpc/"
diff --git a/config.m4 b/config.m4
index 99baebf..ec463b2 100644
--- a/config.m4
+++ b/config.m4
@@ -8,23 +8,21 @@
   PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/include)
   PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/src/php/ext/grpc)
   PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/boringssl/include)
-  PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/cares)
-  PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/cares/cares)
 
   LIBS="-lpthread $LIBS"
 
+  CFLAGS="-Wall -Werror -Wno-parentheses-equality -Wno-unused-value -std=c11"
+  CXXFLAGS="-std=c++11"
   GRPC_SHARED_LIBADD="-lpthread $GRPC_SHARED_LIBADD"
+  PHP_REQUIRE_CXX()
   PHP_ADD_LIBRARY(pthread)
-
   PHP_ADD_LIBRARY(dl,,GRPC_SHARED_LIBADD)
   PHP_ADD_LIBRARY(dl)
 
   case $host in
     *darwin*)
-      PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/cares/config_darwin)
       ;;
     *)
-      PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/cares/config_linux)
       PHP_ADD_LIBRARY(rt,,GRPC_SHARED_LIBADD)
       PHP_ADD_LIBRARY(rt)
       ;;
@@ -114,6 +112,7 @@
     src/core/lib/iomgr/ev_epollsig_linux.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/ev_windows.c \
     src/core/lib/iomgr/exec_ctx.c \
     src/core/lib/iomgr/executor.c \
     src/core/lib/iomgr/iocp_windows.c \
@@ -331,6 +330,8 @@
     src/core/ext/census/tracing.c \
     src/core/ext/filters/max_age/max_age_filter.c \
     src/core/ext/filters/message_size/message_size_filter.c \
+    src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c \
+    src/core/ext/filters/workarounds/workaround_utils.c \
     src/core/plugin_registry/grpc_plugin_registry.c \
     src/boringssl/err_data.c \
     third_party/boringssl/crypto/aes/aes.c \
@@ -636,59 +637,9 @@
     third_party/boringssl/ssl/tls13_server.c \
     third_party/boringssl/ssl/tls_method.c \
     third_party/boringssl/ssl/tls_record.c \
-    third_party/cares/cares/ares__close_sockets.c \
-    third_party/cares/cares/ares__get_hostent.c \
-    third_party/cares/cares/ares__read_line.c \
-    third_party/cares/cares/ares__timeval.c \
-    third_party/cares/cares/ares_cancel.c \
-    third_party/cares/cares/ares_create_query.c \
-    third_party/cares/cares/ares_data.c \
-    third_party/cares/cares/ares_destroy.c \
-    third_party/cares/cares/ares_expand_name.c \
-    third_party/cares/cares/ares_expand_string.c \
-    third_party/cares/cares/ares_fds.c \
-    third_party/cares/cares/ares_free_hostent.c \
-    third_party/cares/cares/ares_free_string.c \
-    third_party/cares/cares/ares_getenv.c \
-    third_party/cares/cares/ares_gethostbyaddr.c \
-    third_party/cares/cares/ares_gethostbyname.c \
-    third_party/cares/cares/ares_getnameinfo.c \
-    third_party/cares/cares/ares_getopt.c \
-    third_party/cares/cares/ares_getsock.c \
-    third_party/cares/cares/ares_init.c \
-    third_party/cares/cares/ares_library_init.c \
-    third_party/cares/cares/ares_llist.c \
-    third_party/cares/cares/ares_mkquery.c \
-    third_party/cares/cares/ares_nowarn.c \
-    third_party/cares/cares/ares_options.c \
-    third_party/cares/cares/ares_parse_a_reply.c \
-    third_party/cares/cares/ares_parse_aaaa_reply.c \
-    third_party/cares/cares/ares_parse_mx_reply.c \
-    third_party/cares/cares/ares_parse_naptr_reply.c \
-    third_party/cares/cares/ares_parse_ns_reply.c \
-    third_party/cares/cares/ares_parse_ptr_reply.c \
-    third_party/cares/cares/ares_parse_soa_reply.c \
-    third_party/cares/cares/ares_parse_srv_reply.c \
-    third_party/cares/cares/ares_parse_txt_reply.c \
-    third_party/cares/cares/ares_platform.c \
-    third_party/cares/cares/ares_process.c \
-    third_party/cares/cares/ares_query.c \
-    third_party/cares/cares/ares_search.c \
-    third_party/cares/cares/ares_send.c \
-    third_party/cares/cares/ares_strcasecmp.c \
-    third_party/cares/cares/ares_strdup.c \
-    third_party/cares/cares/ares_strerror.c \
-    third_party/cares/cares/ares_timeout.c \
-    third_party/cares/cares/ares_version.c \
-    third_party/cares/cares/ares_writev.c \
-    third_party/cares/cares/bitncmp.c \
-    third_party/cares/cares/inet_net_pton.c \
-    third_party/cares/cares/inet_ntop.c \
-    third_party/cares/cares/windows_port.c \
-    , $ext_shared, , -Wall -Werror \
-    -Wno-parentheses-equality -Wno-unused-value -std=c11 \
-    -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN \
-    -D_HAS_EXCEPTIONS=0 -DNOMINMAX)
+    , $ext_shared, , -fvisibility=hidden \
+    -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN \
+    -D_HAS_EXCEPTIONS=0 -DNOMINMAX -DGRPC_ARES=0)
 
   PHP_ADD_BUILD_DIR($ext_builddir/src/php/ext/grpc)
 
@@ -711,6 +662,7 @@
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/filters/load_reporting)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/filters/max_age)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/filters/message_size)
+  PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/filters/workarounds)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/chttp2/alpn)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/chttp2/client)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/chttp2/client/insecure)
@@ -787,6 +739,5 @@
   PHP_ADD_BUILD_DIR($ext_builddir/third_party/boringssl/crypto/x509)
   PHP_ADD_BUILD_DIR($ext_builddir/third_party/boringssl/crypto/x509v3)
   PHP_ADD_BUILD_DIR($ext_builddir/third_party/boringssl/ssl)
-  PHP_ADD_BUILD_DIR($ext_builddir/third_party/cares/cares)
   PHP_ADD_BUILD_DIR($ext_builddir/third_party/nanopb)
 fi
diff --git a/doc/PROTOCOL-WEB.md b/doc/PROTOCOL-WEB.md
index 6bb2808..5f37df9 100644
--- a/doc/PROTOCOL-WEB.md
+++ b/doc/PROTOCOL-WEB.md
@@ -1,4 +1,4 @@
-# Overview
+# gRPC Web
 
 gRPC-Web provides a JS client library that supports the same API
 as gRPC-Node to access a gRPC service. Due to browser limitation,
diff --git a/doc/compression.md b/doc/compression.md
index de245d9..ee22bc3 100644
--- a/doc/compression.md
+++ b/doc/compression.md
@@ -1,4 +1,4 @@
-## **gRPC Compression**
+## gRPC Compression
 
 The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD",
 "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in this document are to be
@@ -112,7 +112,7 @@
 1. An ill-constructed message with its [Compressed-Flag
 bit](PROTOCOL-HTTP2.md#compressed-flag)
 set but lacking a
-"[grpc-encoding](PROTOCOL-HTTP2.md#message-encoding)"
+[grpc-encoding](PROTOCOL-HTTP2.md#message-encoding)
 entry different from _identity_ in its metadata MUST fail with `INTERNAL`
 status, its associated description indicating the invalid Compressed-Flag
 condition.
diff --git a/doc/cpp-style-guide.md b/doc/cpp-style-guide.md
index a1f9135..8211703 100644
--- a/doc/cpp-style-guide.md
+++ b/doc/cpp-style-guide.md
@@ -5,5 +5,4 @@
 guide] (https://google.github.io/styleguide/cppguide.html). Additionally,
 as in C, layout rules are defined by clang-format, and all code
 should be passed through clang-format. A (docker-based) script to do
-so is included in [tools/distrib/clang\_format\_code.sh]
-(../tools/distrib/clang_format_code.sh).
+so is included in [tools/distrib/clang_format_code.sh](../tools/distrib/clang_format_code.sh).
diff --git a/doc/fail_fast.md b/doc/fail_fast.md
index 2dd5561..ff3d235 100644
--- a/doc/fail_fast.md
+++ b/doc/fail_fast.md
@@ -1 +1 @@
-Moved to wait-for-ready.md
+Moved to [wait-for-ready.md](wait-for-ready.md)
diff --git a/doc/service_config.md b/doc/service_config.md
index 8039fca..99d985f 100644
--- a/doc/service_config.md
+++ b/doc/service_config.md
@@ -131,8 +131,8 @@
 
 # Architecture
 
-A service config is associated with a server name.  The [name
-resolver](naming.md) plugin, when asked to resolve a particular server
+A service config is associated with a server name.  The [name resolver](naming.md)
+plugin, when asked to resolve a particular server
 name, will return both the resolved addresses and the service config.
 
 TODO(roth): Design how the service config will be encoded in DNS.
diff --git a/doc/stress_test_framework.md b/doc/stress_test_framework.md
index 18f545e..2212d98 100644
--- a/doc/stress_test_framework.md
+++ b/doc/stress_test_framework.md
@@ -2,7 +2,7 @@
 
 (Sree Kuchibhotla - sreek@)
 
-> Status: This is implemented. More details at [README.md](https://github.com/grpc/grpc/blob/master/tools/run_tests/stress_test/README.md)
+Status: This is implemented. More details at [README.md](https://github.com/grpc/grpc/blob/master/tools/run_tests/stress_test/README.md)
 
 
 **I. GOALS**
diff --git a/doc/unit_testing.md b/doc/unit_testing.md
new file mode 100644
index 0000000..0aa9be9
--- /dev/null
+++ b/doc/unit_testing.md
@@ -0,0 +1,175 @@
+# How to write unit tests for gRPC C client.
+
+tl;dr: [Example code](https://github.com/grpc/grpc/blob/master/test/cpp/end2end/mock_test.cc).
+
+To unit-test client-side logic via the synchronous API, gRPC provides a mocked Stub based on googletest(googlemock) that can be programmed upon and easily incorporated in the test code.
+
+For instance, consider an EchoService like this:
+
+
+```proto
+service EchoTestService {
+        rpc Echo(EchoRequest) returns (EchoResponse);
+        rpc BidiStream(stream EchoRequest) returns (stream EchoResponse);
+}
+```
+
+The code generated would look something like this:
+
+```c
+class EchoTestService final {
+  public:
+  class StubInterface {
+    virtual ::grpc::Status Echo(::grpc::ClientContext* context, const ::grpc::testing::EchoRequest& request, ::grpc::testing::EchoResponse* response) = 0;
+  …
+    std::unique_ptr< ::grpc::ClientReaderWriterInterface< ::grpc::testing::EchoRequest, ::grpc::testing::EchoResponse>> BidiStream(::grpc::ClientContext* context) {
+      return std::unique_ptr< ::grpc::ClientReaderWriterInterface< ::grpc::testing::EchoRequest, ::grpc::testing::EchoResponse>>(BidiStreamRaw(context));
+    }
+  …
+    private:
+    virtual ::grpc::ClientReaderWriterInterface< ::grpc::testing::EchoRequest, ::grpc::testing::EchoResponse>* BidiStreamRaw(::grpc::ClientContext* context) = 0;
+  …
+  } // End StubInterface
+…
+} // End EchoTestService
+```
+
+
+If we mock the StubInterface and set expectations on the pure-virtual methods we can test client-side logic without having to make any rpcs.
+
+A mock for this StubInterface will look like this:
+
+
+```c
+class MockEchoTestServiceStub : public EchoTestService::StubInterface {
+ public:
+  MOCK_METHOD3(Echo, ::grpc::Status(::grpc::ClientContext* context, const ::grpc::testing::EchoRequest& request, ::grpc::testing::EchoResponse* response));
+  MOCK_METHOD1(BidiStreamRaw, ::grpc::ClientReaderWriterInterface< ::grpc::testing::EchoRequest, ::grpc::testing::EchoResponse>*(::grpc::ClientContext* context));
+};
+```
+
+
+**Generating mock code:**
+
+Such a mock can be auto-generated by:
+
+
+
+1.  Setting flag(generate_mock_code=true) on grpc plugin for protoc, or
+1.  Setting an attribute(generate_mock) in your bazel rule.
+
+Protoc plugin flag:
+
+```sh
+protoc -I . --grpc_out=generate_mock_code=true:. --plugin=protoc-gen-grpc=`which grpc_cpp_plugin` echo.proto
+```
+
+Bazel rule:
+
+```py
+grpc_proto_library(
+  name = "echo_proto",
+  srcs = ["echo.proto"],
+  generate_mock = True, 
+)
+```
+
+
+By adding such a flag now a header file `echo_mock.grpc.pb.h` containing the mocked stub will also be generated. 
+
+This header file can then be included in test files along with a gmock dependency.
+
+**Writing tests with mocked Stub.**
+
+Consider the following client a user might have:
+
+```c
+class FakeClient {
+ public:
+  explicit FakeClient(EchoTestService::StubInterface* stub) : stub_(stub) {}
+
+  void DoEcho() {
+    ClientContext context;
+    EchoRequest request;
+    EchoResponse response;
+    request.set_message("hello world");
+    Status s = stub_->Echo(&context, request, &response);
+    EXPECT_EQ(request.message(), response.message());
+    EXPECT_TRUE(s.ok());
+  }
+
+  void DoBidiStream() {
+    EchoRequest request;
+    EchoResponse response;
+    ClientContext context;
+    grpc::string msg("hello");
+
+    std::unique_ptr<ClientReaderWriterInterface<EchoRequest, EchoResponse>>
+        stream = stub_->BidiStream(&context);
+
+    request.set_message(msg  "0");
+    EXPECT_TRUE(stream->Write(request));
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message());
+
+    request.set_message(msg  "1");
+    EXPECT_TRUE(stream->Write(request));
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message());
+
+    request.set_message(msg  "2");
+    EXPECT_TRUE(stream->Write(request));
+    EXPECT_TRUE(stream->Read(&response));
+    EXPECT_EQ(response.message(), request.message());
+
+    stream->WritesDone();
+    EXPECT_FALSE(stream->Read(&response));
+
+    Status s = stream->Finish();
+    EXPECT_TRUE(s.ok());
+  }
+
+  void ResetStub(EchoTestService::StubInterface* stub) { stub_ = stub; }
+
+ private:
+  EchoTestService::StubInterface* stub_;
+};
+```
+
+A test could initialize this FakeClient with a mocked stub having set expectations on it:
+
+Unary RPC:
+
+```c
+MockEchoTestServiceStub stub;
+EchoResponse resp;
+resp.set_message("hello world");
+Expect_CALL(stub, Echo(_,_,_)).Times(Atleast(1)).WillOnce(DoAll(SetArgPointee<2>(resp), Return(Status::OK)));
+FakeClient client(stub);
+client.DoEcho();
+```
+
+Streaming RPC:
+
+```c
+ACTION_P(copy, msg) {
+  arg0->set_message(msg->message());
+}
+
+
+auto rw = new MockClientReaderWriter<EchoRequest, EchoResponse>();
+EchoRequest msg;
+EXPECT_CALL(*rw, Write(_, _)).Times(3).WillRepeatedly(DoAll(SaveArg<0>(&msg), Return(true)));
+EXPECT_CALL(*rw, Read(_)).
+      WillOnce(DoAll(WithArg<0>(copy(&msg)), Return(true))).
+      WillOnce(DoAll(WithArg<0>(copy(&msg)), Return(true))).
+      WillOnce(DoAll(WithArg<0>(copy(&msg)), Return(true))).
+      WillOnce(Return(false));
+
+MockEchoTestServiceStub  stub;
+EXPECT_CALL(stub, BidiStreamRaw(_)).Times(AtLeast(1)).WillOnce(Return(rw));
+
+FakeClient client(stub);
+client.DoBidiStream();
+```
+
diff --git a/doc/workarounds.md b/doc/workarounds.md
new file mode 100644
index 0000000..bc51186
--- /dev/null
+++ b/doc/workarounds.md
@@ -0,0 +1,19 @@
+# gRPC Server Backward Compatibility Issues and Workarounds Manageent
+
+## Introduction
+This document lists the workarounds implemented on gRPC servers for record and reference when users need to enable a certain workaround.
+
+## Workaround List
+
+### Cronet Compression
+
+**Workaround ID:** WORKAROUND\_ID\_CRONET\_COMPRESSION
+
+**Date added:** May 06, 2017
+
+**Status:** Implemented in C core and C++
+
+**Issue:** Before version v1.3.0-dev, gRPC iOS client's Cronet transport did not implement compression. However the clients still claim to support compression. As a result, a client fails to parse received message when the message is compressed.
+The problem above was resolved in gRPC v1.3.0-dev. For backward compatibility, a server must forcingly disable compression for gRPC clients of version lower than or equal to v1.3.0-dev.
+
+**Workaround Description:** Implemented as a server channel filter in C core.  The filter identifies the version of peer client with incoming `user-agent` header of each call. If the client's gRPC version is lower that or equal to v1.3.x, a flag GRPC_WRITE_NO_COMPRESS is marked for all send_message ops which prevents compression of the messages to be sent out.
diff --git a/examples/BUILD b/examples/BUILD
index 382713e..bd2d3c3 100644
--- a/examples/BUILD
+++ b/examples/BUILD
@@ -54,13 +54,13 @@
 cc_binary(
     name = "greeter_client",
     srcs = ["cpp/helloworld/greeter_client.cc"],
-    deps = ["helloworld"],
     defines = ["BAZEL_BUILD"],
+    deps = [":helloworld"],
 )
 
 cc_binary(
     name = "greeter_server",
     srcs = ["cpp/helloworld/greeter_server.cc"],
-    deps = ["helloworld"],
     defines = ["BAZEL_BUILD"],
+    deps = [":helloworld"],
 )
diff --git a/examples/php/composer.json b/examples/php/composer.json
index f4b177c..9d900eb 100644
--- a/examples/php/composer.json
+++ b/examples/php/composer.json
@@ -2,7 +2,8 @@
   "name": "grpc/grpc-demo",
   "description": "gRPC example for PHP",
   "require": {
-    "grpc/grpc": "^v1.1.0"
+    "grpc/grpc": "^v1.3.0",
+    "google/protobuf": "^v3.3.0"
   },
   "autoload": {
     "psr-4": {
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index a6c083d..1176a15 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -166,6 +166,7 @@
                       'include/grpc/slice.h',
                       'include/grpc/slice_buffer.h',
                       'include/grpc/status.h',
+                      'include/grpc/support/workaround_list.h',
                       'include/grpc/impl/codegen/byte_buffer_reader.h',
                       'include/grpc/impl/codegen/compression_types.h',
                       'include/grpc/impl/codegen/connectivity_state.h',
@@ -473,6 +474,8 @@
                       'src/core/ext/census/tracing.h',
                       'src/core/ext/filters/max_age/max_age_filter.h',
                       'src/core/ext/filters/message_size/message_size_filter.h',
+                      'src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h',
+                      'src/core/ext/filters/workarounds/workaround_utils.h',
                       'src/core/lib/surface/init.c',
                       'src/core/lib/channel/channel_args.c',
                       'src/core/lib/channel/channel_stack.c',
@@ -500,6 +503,7 @@
                       'src/core/lib/iomgr/ev_epollsig_linux.c',
                       'src/core/lib/iomgr/ev_poll_posix.c',
                       'src/core/lib/iomgr/ev_posix.c',
+                      'src/core/lib/iomgr/ev_windows.c',
                       'src/core/lib/iomgr/exec_ctx.c',
                       'src/core/lib/iomgr/executor.c',
                       'src/core/lib/iomgr/iocp_windows.c',
@@ -717,6 +721,8 @@
                       'src/core/ext/census/tracing.c',
                       'src/core/ext/filters/max_age/max_age_filter.c',
                       'src/core/ext/filters/message_size/message_size_filter.c',
+                      'src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c',
+                      'src/core/ext/filters/workarounds/workaround_utils.c',
                       'src/core/plugin_registry/grpc_plugin_registry.c'
 
     ss.private_header_files = 'src/core/lib/profiling/timers.h',
@@ -950,7 +956,9 @@
                               'src/core/ext/census/trace_string.h',
                               'src/core/ext/census/tracing.h',
                               'src/core/ext/filters/max_age/max_age_filter.h',
-                              'src/core/ext/filters/message_size/message_size_filter.h'
+                              'src/core/ext/filters/message_size/message_size_filter.h',
+                              'src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h',
+                              'src/core/ext/filters/workarounds/workaround_utils.h'
   end
 
   s.subspec 'Cronet-Interface' do |ss|
diff --git a/grpc.gemspec b/grpc.gemspec
index 7fe4fe2..32c1164 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -154,6 +154,7 @@
   s.files += %w( include/grpc/slice.h )
   s.files += %w( include/grpc/slice_buffer.h )
   s.files += %w( include/grpc/status.h )
+  s.files += %w( include/grpc/support/workaround_list.h )
   s.files += %w( include/grpc/impl/codegen/byte_buffer_reader.h )
   s.files += %w( include/grpc/impl/codegen/compression_types.h )
   s.files += %w( include/grpc/impl/codegen/connectivity_state.h )
@@ -389,6 +390,8 @@
   s.files += %w( src/core/ext/census/tracing.h )
   s.files += %w( src/core/ext/filters/max_age/max_age_filter.h )
   s.files += %w( src/core/ext/filters/message_size/message_size_filter.h )
+  s.files += %w( src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h )
+  s.files += %w( src/core/ext/filters/workarounds/workaround_utils.h )
   s.files += %w( src/core/lib/surface/init.c )
   s.files += %w( src/core/lib/channel/channel_args.c )
   s.files += %w( src/core/lib/channel/channel_stack.c )
@@ -416,6 +419,7 @@
   s.files += %w( src/core/lib/iomgr/ev_epollsig_linux.c )
   s.files += %w( src/core/lib/iomgr/ev_poll_posix.c )
   s.files += %w( src/core/lib/iomgr/ev_posix.c )
+  s.files += %w( src/core/lib/iomgr/ev_windows.c )
   s.files += %w( src/core/lib/iomgr/exec_ctx.c )
   s.files += %w( src/core/lib/iomgr/executor.c )
   s.files += %w( src/core/lib/iomgr/iocp_windows.c )
@@ -633,6 +637,8 @@
   s.files += %w( src/core/ext/census/tracing.c )
   s.files += %w( src/core/ext/filters/max_age/max_age_filter.c )
   s.files += %w( src/core/ext/filters/message_size/message_size_filter.c )
+  s.files += %w( src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c )
+  s.files += %w( src/core/ext/filters/workarounds/workaround_utils.c )
   s.files += %w( src/core/plugin_registry/grpc_plugin_registry.c )
   s.files += %w( third_party/boringssl/crypto/aes/internal.h )
   s.files += %w( third_party/boringssl/crypto/asn1/asn1_locl.h )
diff --git a/include/grpc++/ext/health_check_service_server_builder_option.h b/include/grpc++/ext/health_check_service_server_builder_option.h
index 4861daa..a27841a 100644
--- a/include/grpc++/ext/health_check_service_server_builder_option.h
+++ b/include/grpc++/ext/health_check_service_server_builder_option.h
@@ -44,8 +44,8 @@
 
 class HealthCheckServiceServerBuilderOption : public ServerBuilderOption {
  public:
-  // The ownership of hc will be taken and transferred to the grpc server.
-  // To explicitly disable default service, pass in a nullptr.
+  /// The ownership of hc will be taken and transferred to the grpc server.
+  /// To explicitly disable default service, pass in a nullptr.
   explicit HealthCheckServiceServerBuilderOption(
       std::unique_ptr<HealthCheckServiceInterface> hc);
   ~HealthCheckServiceServerBuilderOption() override {}
diff --git a/include/grpc++/ext/proto_server_reflection_plugin.h b/include/grpc++/ext/proto_server_reflection_plugin.h
index 66f39eb..6497bba 100644
--- a/include/grpc++/ext/proto_server_reflection_plugin.h
+++ b/include/grpc++/ext/proto_server_reflection_plugin.h
@@ -59,8 +59,8 @@
   std::shared_ptr<grpc::ProtoServerReflection> reflection_service_;
 };
 
-// Add proto reflection plugin to ServerBuilder. This function should be called
-// at the static initialization time.
+/// Add proto reflection plugin to ServerBuilder. This function should be called
+/// at the static initialization time.
 void InitProtoReflectionServerBuilderPlugin();
 
 }  // namespace reflection
diff --git a/include/grpc++/generic/generic_stub.h b/include/grpc++/generic/generic_stub.h
index 02c00d0..1478846 100644
--- a/include/grpc++/generic/generic_stub.h
+++ b/include/grpc++/generic/generic_stub.h
@@ -43,14 +43,18 @@
 typedef ClientAsyncReaderWriter<ByteBuffer, ByteBuffer>
     GenericClientAsyncReaderWriter;
 
-// Generic stubs provide a type-unsafe interface to call gRPC methods
-// by name.
+/// Generic stubs provide a type-unsafe interface to call gRPC methods
+/// by name.
 class GenericStub final {
  public:
   explicit GenericStub(std::shared_ptr<ChannelInterface> channel)
       : channel_(channel) {}
 
-  // begin a call to a named method
+  /// Begin a call to a named method \a method using \a context.
+  /// A tag \a tag will be delivered to \a cq when the call has been started
+  /// (i.e, initial metadata has been sent).
+  /// The return value only indicates whether or not registration of the call
+  /// succeeded (i.e. the call won't proceed if the return value is nullptr).
   std::unique_ptr<GenericClientAsyncReaderWriter> Call(
       ClientContext* context, const grpc::string& method, CompletionQueue* cq,
       void* tag);
diff --git a/include/grpc++/grpc++.h b/include/grpc++/grpc++.h
index daecfea..978b172 100644
--- a/include/grpc++/grpc++.h
+++ b/include/grpc++/grpc++.h
@@ -34,14 +34,18 @@
 /// \mainpage gRPC C++ API
 ///
 /// The gRPC C++ API mainly consists of the following classes:
+//
 /// - grpc::Channel, which represents the connection to an endpoint. See [the
 /// gRPC Concepts page](http://www.grpc.io/docs/guides/concepts.html) for more
 /// details. Channels are created by the factory function grpc::CreateChannel.
+//
 /// - grpc::CompletionQueue, the producer-consumer queue used for all
 /// asynchronous communication with the gRPC runtime.
+//
 /// - grpc::ClientContext and grpc::ServerContext, where optional configuration
 /// for an RPC can be set, such as setting custom metadata to be conveyed to the
 /// peer, compression settings, authentication, etc.
+//
 /// - grpc::Server, representing a gRPC server, created by grpc::ServerBuilder.
 ///
 /// Streaming calls are handled with the streaming classes in
diff --git a/include/grpc++/health_check_service_interface.h b/include/grpc++/health_check_service_interface.h
index 0eed702..c1b4319 100644
--- a/include/grpc++/health_check_service_interface.h
+++ b/include/grpc++/health_check_service_interface.h
@@ -41,26 +41,27 @@
 const char kHealthCheckServiceInterfaceArg[] =
     "grpc.health_check_service_interface";
 
-// The gRPC server uses this interface to expose the health checking service
-// without depending on protobuf.
+/// The gRPC server uses this interface to expose the health checking service
+/// without depending on protobuf.
 class HealthCheckServiceInterface {
  public:
   virtual ~HealthCheckServiceInterface() {}
 
-  // Set or change the serving status of the given service_name.
+  /// Set or change the serving status of the given service_name.
   virtual void SetServingStatus(const grpc::string& service_name,
                                 bool serving) = 0;
-  // Apply to all registered service names.
+  /// Apply to all registered service names.
   virtual void SetServingStatus(bool serving) = 0;
 };
 
-// Enable/disable the default health checking service. This applies to all C++
-// servers created afterwards. For each server, user can override the default
-// with a HealthCheckServiceServerBuilderOption.
-// NOT thread safe.
+/// Enable/disable the default health checking service. This applies to all C++
+/// servers created afterwards. For each server, user can override the default
+/// with a HealthCheckServiceServerBuilderOption.
+/// NOT thread safe.
 void EnableDefaultHealthCheckService(bool enable);
 
-// NOT thread safe.
+/// Returns whether the default health checking service is enabled.
+/// NOT thread safe.
 bool DefaultHealthCheckServiceEnabled();
 
 }  // namespace grpc
diff --git a/include/grpc++/impl/codegen/async_stream.h b/include/grpc++/impl/codegen/async_stream.h
index f97d824..04fc524 100644
--- a/include/grpc++/impl/codegen/async_stream.h
+++ b/include/grpc++/impl/codegen/async_stream.h
@@ -53,16 +53,38 @@
   /// Request notification of the reading of the initial metadata. Completion
   /// will be notified by \a tag on the associated completion queue.
   /// This call is optional, but if it is used, it cannot be used concurrently
-  /// with or after the \a Read method.
+  /// with or after the \a AsyncReaderInterface::Read method.
   ///
   /// \param[in] tag Tag identifying this request.
   virtual void ReadInitialMetadata(void* tag) = 0;
 
-  /// Indicate that the stream is to be finished and request notification
-  /// Should not be used concurrently with other operations
+  /// Indicate that the stream is to be finished and request notification for
+  /// when the call has been ended.
+  /// Should not be used concurrently with other operations.
   ///
-  /// \param[out] status To be updated with the operation status.
+  /// It is appropriate to call this method when both:
+  ///   * the client side has no more message to send
+  ///     (this can be declared implicitly by calling this method, or
+  ///     explicitly through an earlier call to the <i>WritesDone</i> method
+  ///     of the class in use, e.g. \a ClientAsyncWriterInterface::WritesDone or
+  ///     \a ClientAsyncReaderWriterInterface::WritesDone).
+  ///   * there are no more messages to be received from the server (this can
+  ///     be known implicitly by the calling code, or explicitly from an
+  ///     earlier call to \a AsyncReaderInterface::Read that yielded a failed
+  ///     result, e.g. cq->Next(&read_tag, &ok) filled in 'ok' with 'false').
+  ///
+  /// This function will return when either:
+  /// - all incoming messages have been read and the server has returned
+  ///   a status.
+  /// - the server has returned a non-OK status.
+  /// - the call failed for some reason and the library generated a
+  ///   status.
+  ///
+  /// Note that implementations of this method attempt to receive initial
+  /// metadata from the server if initial metadata hasn't yet been received.
+  ///
   /// \param[in] tag Tag identifying this request.
+  /// \param[out] status To be updated with the operation status.
   virtual void Finish(Status* status, void* tag) = 0;
 };
 
@@ -77,11 +99,14 @@
   /// This is thread-safe with respect to \a Write or \a WritesDone methods. It
   /// should not be called concurrently with other streaming APIs
   /// on the same stream. It is not meaningful to call it concurrently
-  /// with another \a Read on the same stream since reads on the same stream
-  /// are delivered in order.
+  /// with another \a AsyncReaderInterface::Read on the same stream since reads
+  /// on the same stream are delivered in order.
   ///
   /// \param[out] msg Where to eventually store the read message.
   /// \param[in] tag The tag identifying the operation.
+  ///
+  /// Side effect: note that this method attempt to receive initial metadata for
+  /// a stream if it hasn't yet been received.
   virtual void Read(R* msg, void* tag) = 0;
 };
 
@@ -96,7 +121,7 @@
   /// Only one write may be outstanding at any given time. This means that
   /// after calling Write, one must wait to receive \a tag from the completion
   /// queue BEFORE calling Write again.
-  /// This is thread-safe with respect to \a Read
+  /// This is thread-safe with respect to \a AsyncReaderInterface::Read
   ///
   /// \param[in] msg The message to be written.
   /// \param[in] tag The tag identifying the operation.
@@ -109,7 +134,7 @@
   /// after calling Write, one must wait to receive \a tag from the completion
   /// queue BEFORE calling Write again.
   /// WriteOptions \a options is used to set the write options of this message.
-  /// This is thread-safe with respect to \a Read
+  /// This is thread-safe with respect to \a AsyncReaderInterface::Read
   ///
   /// \param[in] msg The message to be written.
   /// \param[in] options The WriteOptions to be used to write this message.
@@ -117,11 +142,11 @@
   virtual void Write(const W& msg, WriteOptions options, void* tag) = 0;
 
   /// Request the writing of \a msg and coalesce it with the writing
-  /// of trailing metadata, using WriteOptions \a options with identifying tag
-  /// \a tag.
+  /// of trailing metadata, using WriteOptions \a options with
+  /// identifying tag \a tag.
   ///
-  /// For client, WriteLast is equivalent of performing Write and WritesDone in
-  /// a single step.
+  /// For client, WriteLast is equivalent of performing Write and
+  /// WritesDone in a single step.
   /// For server, WriteLast buffers the \a msg. The writing of \a msg is held
   /// until Finish is called, where \a msg and trailing metadata are coalesced
   /// and write is initiated. Note that WriteLast can only buffer \a msg up to
@@ -140,10 +165,17 @@
 class ClientAsyncReaderInterface : public ClientAsyncStreamingInterface,
                                    public AsyncReaderInterface<R> {};
 
+/// Async client-side API for doing server-streaming RPCs,
+/// where the incoming message stream coming from the server has
+/// messages of type \a R.
 template <class R>
 class ClientAsyncReader final : public ClientAsyncReaderInterface<R> {
  public:
   /// Create a stream and write the first request out.
+  /// \a tag will be notified on \a cq when the call has been started and
+  /// \a request has been written out.
+  /// Note that \a context will be used to fill in custom initial metadata
+  /// used to send to the server when starting the call.
   template <class W>
   static ClientAsyncReader* Create(ChannelInterface* channel,
                                    CompletionQueue* cq, const RpcMethod& method,
@@ -160,6 +192,14 @@
     assert(size == sizeof(ClientAsyncReader));
   }
 
+  /// See the \a ClientAsyncStreamingInterface.ReadInitialMetadata
+  /// method for semantics.
+  ///
+  /// Side effect:
+  ///   - upon receiving initial metadata from the server,
+  ///     the \a ClientContext associated with this call is updated, and the
+  ///     calling code can access the received metadata through the
+  ///     \a ClientContext.
   void ReadInitialMetadata(void* tag) override {
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
@@ -177,6 +217,11 @@
     call_.PerformOps(&read_ops_);
   }
 
+  /// See the \a ClientAsyncStreamingInterface.Finish method for semantics.
+  ///
+  /// Side effect:
+  ///   - the \a ClientContext associated with this call is updated with
+  ///     possible initial and trailing metadata received from the server.
   void Finish(Status* status, void* tag) override {
     finish_ops_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
@@ -214,16 +259,27 @@
 class ClientAsyncWriterInterface : public ClientAsyncStreamingInterface,
                                    public AsyncWriterInterface<W> {
  public:
-  /// Signal the client is done with the writes.
-  /// Thread-safe with respect to \a Read
+  /// Signal the client is done with the writes (half-close the client stream).
+  /// Thread-safe with respect to \a AsyncReaderInterface::Read
   ///
   /// \param[in] tag The tag identifying the operation.
   virtual void WritesDone(void* tag) = 0;
 };
 
+/// Async API on the client side for doing client-streaming RPCs,
+/// where the outgoing message stream going to the server contains
+/// messages of type \a W.
 template <class W>
 class ClientAsyncWriter final : public ClientAsyncWriterInterface<W> {
  public:
+  /// Create a stream and write the first request out.
+  /// \a tag will be notified on \a cq when the call has been started (i.e.
+  /// intitial metadata sent) and \a request has been written out.
+  /// Note that \a context will be used to fill in custom initial metadata
+  /// used to send to the server when starting the call.
+  /// \a response will be filled in with the single expected response
+  /// message from the server upon a successful call to the \a Finish
+  /// method of this instance.
   template <class R>
   static ClientAsyncWriter* Create(ChannelInterface* channel,
                                    CompletionQueue* cq, const RpcMethod& method,
@@ -240,6 +296,13 @@
     assert(size == sizeof(ClientAsyncWriter));
   }
 
+  /// See the \a ClientAsyncStreamingInterface.ReadInitialMetadata method for
+  /// semantics.
+  ///
+  /// Side effect:
+  ///   - upon receiving initial metadata from the server, the \a ClientContext
+  ///     associated with this call is updated, and the calling code can access
+  ///     the received metadata through the \a ClientContext.
   void ReadInitialMetadata(void* tag) override {
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
@@ -272,6 +335,13 @@
     call_.PerformOps(&write_ops_);
   }
 
+  /// See the \a ClientAsyncStreamingInterface.Finish method for semantics.
+  ///
+  /// Side effect:
+  ///   - the \a ClientContext associated with this call is updated with
+  ///     possible initial and trailing metadata received from the server.
+  ///   - attempts to fill in the \a response parameter passed to this class's
+  ///     constructor with the server's response message.
   void Finish(Status* status, void* tag) override {
     finish_ops_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
@@ -310,23 +380,34 @@
       finish_ops_;
 };
 
-/// Client-side interface for asynchronous bi-directional streaming.
+/// Async client-side interface for bi-directional streaming,
+/// where the client-to-server message stream has messages of type \a W,
+/// and the server-to-client message stream has messages of type \a R.
 template <class W, class R>
 class ClientAsyncReaderWriterInterface : public ClientAsyncStreamingInterface,
                                          public AsyncWriterInterface<W>,
                                          public AsyncReaderInterface<R> {
  public:
-  /// Signal the client is done with the writes.
-  /// Thread-safe with respect to \a Read
+  /// Signal the client is done with the writes (half-close the client stream).
+  /// Thread-safe with respect to \a AsyncReaderInterface::Read
   ///
   /// \param[in] tag The tag identifying the operation.
   virtual void WritesDone(void* tag) = 0;
 };
 
+/// Async client-side interface for bi-directional streaming,
+/// where the outgoing message stream going to the server
+/// has messages of type \a W,  and the incoming message stream coming
+/// from the server has messages of type \a R.
 template <class W, class R>
 class ClientAsyncReaderWriter final
     : public ClientAsyncReaderWriterInterface<W, R> {
  public:
+  /// Create a stream and write the first request out.
+  /// \a tag will be notified on \a cq when the call has been started (i.e.
+  /// intitial metadata sent).
+  /// Note that \a context will be used to fill in custom initial metadata
+  /// used to send to the server when starting the call.
   static ClientAsyncReaderWriter* Create(ChannelInterface* channel,
                                          CompletionQueue* cq,
                                          const RpcMethod& method,
@@ -343,6 +424,13 @@
     assert(size == sizeof(ClientAsyncReaderWriter));
   }
 
+  /// See the \a ClientAsyncStreamingInterface.ReadInitialMetadata method
+  /// for semantics of this method.
+  ///
+  /// Side effect:
+  ///   - upon receiving initial metadata from the server, the \a ClientContext
+  ///     is updated with it, and then the receiving initial metadata can
+  ///     be accessed through this \a ClientContext.
   void ReadInitialMetadata(void* tag) override {
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
@@ -384,6 +472,10 @@
     call_.PerformOps(&write_ops_);
   }
 
+  /// See the \a ClientAsyncStreamingInterface.Finish method for semantics.
+  /// Side effect
+  ///   - the \a ClientContext associated with this call is updated with
+  ///     possible initial and trailing metadata sent from the server.
   void Finish(Status* status, void* tag) override {
     finish_ops_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
@@ -422,17 +514,62 @@
 class ServerAsyncReaderInterface : public ServerAsyncStreamingInterface,
                                    public AsyncReaderInterface<R> {
  public:
+  /// Indicate that the stream is to be finished with a certain status code
+  /// and also send out \a msg response to the client.
+  /// Request notification for when the server has sent the response and the
+  /// appropriate signals to the client to end the call.
+  /// Should not be used concurrently with other operations.
+  ///
+  /// It is appropriate to call this method when:
+  ///   * all messages from the client have been received (either known
+  ///     implictly, or explicitly because a previous
+  ///     \a AsyncReaderInterface::Read operation with a non-ok result,
+  ///     e.g., cq->Next(&read_tag, &ok) filled in 'ok' with 'false').
+  ///
+  /// This operation will end when the server has finished sending out initial
+  /// metadata (if not sent already), response message, and status, or if
+  /// some failure occurred when trying to do so.
+  ///
+  /// \param[in] tag Tag identifying this request.
+  /// \param[in] status To be sent to the client as the result of this call.
+  /// \param[in] msg To be sent to the client as the response for this call.
   virtual void Finish(const W& msg, const Status& status, void* tag) = 0;
 
+  /// Indicate that the stream is to be finished with a certain
+  /// non-OK status code.
+  /// Request notification for when the server has sent the appropriate
+  /// signals to the client to end the call.
+  /// Should not be used concurrently with other operations.
+  ///
+  /// This call is meant to end the call with some error, and can be called at
+  /// any point that the server would like to "fail" the call (though note
+  /// this shouldn't be called concurrently with any other "sending" call, like
+  /// \a AsyncWriterInterface::Write).
+  ///
+  /// This operation will end when the server has finished sending out initial
+  /// metadata (if not sent already), and status, or if some failure occurred
+  /// when trying to do so.
+  ///
+  /// \param[in] tag Tag identifying this request.
+  /// \param[in] status To be sent to the client as the result of this call.
+  ///     - Note: \a status must have a non-OK code.
   virtual void FinishWithError(const Status& status, void* tag) = 0;
 };
 
+/// Async server-side API for doing client-streaming RPCs,
+/// where the incoming message stream from the client has messages of type \a R,
+/// and the single response message sent from the server is type \a W.
 template <class W, class R>
 class ServerAsyncReader final : public ServerAsyncReaderInterface<W, R> {
  public:
   explicit ServerAsyncReader(ServerContext* ctx)
       : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
 
+  /// See \a ServerAsyncStreamingInterface::SendInitialMetadata for semantics.
+  ///
+  /// Implicit input parameter:
+  ///   - The initial metadata that will be sent to the client from this op will
+  ///     be taken from the \a ServerContext associated with the call.
   void SendInitialMetadata(void* tag) override {
     GPR_CODEGEN_ASSERT(!ctx_->sent_initial_metadata_);
 
@@ -452,6 +589,14 @@
     call_.PerformOps(&read_ops_);
   }
 
+  /// See the \a ServerAsyncReaderInterface.Read method for semantics
+  ///
+  /// Side effect:
+  ///   - also sends initial metadata if not alreay sent.
+  ///   - uses the \a ServerContext associated with this call to send possible
+  ///     initial and trailing metadata.
+  ///
+  /// Note: \a msg is not sent if \a status has a non-OK code.
   void Finish(const W& msg, const Status& status, void* tag) override {
     finish_ops_.set_output_tag(tag);
     if (!ctx_->sent_initial_metadata_) {
@@ -472,6 +617,12 @@
     call_.PerformOps(&finish_ops_);
   }
 
+  /// See the \a ServerAsyncReaderInterface.Read method for semantics
+  ///
+  /// Side effect:
+  ///   - also sends initial metadata if not alreay sent.
+  ///   - uses the \a ServerContext associated with this call to send possible
+  ///     initial and trailing metadata.
   void FinishWithError(const Status& status, void* tag) override {
     GPR_CODEGEN_ASSERT(!status.ok());
     finish_ops_.set_output_tag(tag);
@@ -503,14 +654,32 @@
 class ServerAsyncWriterInterface : public ServerAsyncStreamingInterface,
                                    public AsyncWriterInterface<W> {
  public:
+  /// Indicate that the stream is to be finished with a certain status code.
+  /// Request notification for when the server has sent the appropriate
+  /// signals to the client to end the call.
+  /// Should not be used concurrently with other operations.
+  ///
+  /// It is appropriate to call this method when either:
+  ///   * all messages from the client have been received (either known
+  ///     implictly, or explicitly because a previous \a
+  ///     AsyncReaderInterface::Read operation with a non-ok
+  ///     result (e.g., cq->Next(&read_tag, &ok) filled in 'ok' with 'false'.
+  ///   * it is desired to end the call early with some non-OK status code.
+  ///
+  /// This operation will end when the server has finished sending out initial
+  /// metadata (if not sent already), response message, and status, or if
+  /// some failure occurred when trying to do so.
+  ///
+  /// \param[in] tag Tag identifying this request.
+  /// \param[in] status To be sent to the client as the result of this call.
   virtual void Finish(const Status& status, void* tag) = 0;
 
   /// Request the writing of \a msg and coalesce it with trailing metadata which
-  /// contains \a status, using WriteOptions options with identifying tag \a
-  /// tag.
+  /// contains \a status, using WriteOptions options with
+  /// identifying tag \a tag.
   ///
-  /// WriteAndFinish is equivalent of performing WriteLast and Finish in a
-  /// single step.
+  /// WriteAndFinish is equivalent of performing WriteLast and Finish
+  /// in a single step.
   ///
   /// \param[in] msg The message to be written.
   /// \param[in] options The WriteOptions to be used to write this message.
@@ -520,12 +689,21 @@
                               const Status& status, void* tag) = 0;
 };
 
+/// Async server-side API for doing server streaming RPCs,
+/// where the outgoing message stream from the server has messages of type \a W.
 template <class W>
 class ServerAsyncWriter final : public ServerAsyncWriterInterface<W> {
  public:
   explicit ServerAsyncWriter(ServerContext* ctx)
       : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
 
+  /// See \a ServerAsyncStreamingInterface::SendInitialMetadata for semantics.
+  ///
+  /// Implicit input parameter:
+  ///   - The initial metadata that will be sent to the client from this op will
+  ///     be taken from the \a ServerContext associated with the call.
+  ///
+  /// \param[in] tag Tag identifying this request.
   void SendInitialMetadata(void* tag) override {
     GPR_CODEGEN_ASSERT(!ctx_->sent_initial_metadata_);
 
@@ -559,6 +737,13 @@
     call_.PerformOps(&write_ops_);
   }
 
+  /// See the \a ServerAsyncWriterInterface.WriteAndFinish method for semantics.
+  ///
+  /// Implicit input parameter:
+  ///   - the \a ServerContext associated with this call is used
+  ///     for sending trailing (and initial) metadata to the client.
+  ///
+  /// Note: \a status must have an OK code.
   void WriteAndFinish(const W& msg, WriteOptions options, const Status& status,
                       void* tag) override {
     write_ops_.set_output_tag(tag);
@@ -569,6 +754,14 @@
     call_.PerformOps(&write_ops_);
   }
 
+  /// See the \a ServerAsyncWriterInterface.Finish method for semantics.
+  ///
+  /// Implicit input parameter:
+  ///   - the \a ServerContext associated with this call is used for sending
+  ///     trailing (and initial if not already sent) metadata to the client.
+  ///
+  /// Note: there are no restrictions are the code of
+  /// \a status,it may be non-OK
   void Finish(const Status& status, void* tag) override {
     finish_ops_.set_output_tag(tag);
     EnsureInitialMetadataSent(&finish_ops_);
@@ -606,11 +799,30 @@
                                          public AsyncWriterInterface<W>,
                                          public AsyncReaderInterface<R> {
  public:
+  /// Indicate that the stream is to be finished with a certain status code.
+  /// Request notification for when the server has sent the appropriate
+  /// signals to the client to end the call.
+  /// Should not be used concurrently with other operations.
+  ///
+  /// It is appropriate to call this method when either:
+  ///   * all messages from the client have been received (either known
+  ///     implictly, or explicitly because a previous \a
+  ///     AsyncReaderInterface::Read operation
+  ///     with a non-ok result (e.g., cq->Next(&read_tag, &ok) filled in 'ok'
+  ///     with 'false'.
+  ///   * it is desired to end the call early with some non-OK status code.
+  ///
+  /// This operation will end when the server has finished sending out initial
+  /// metadata (if not sent already), response message, and status, or if some
+  /// failure occurred when trying to do so.
+  ///
+  /// \param[in] tag Tag identifying this request.
+  /// \param[in] status To be sent to the client as the result of this call.
   virtual void Finish(const Status& status, void* tag) = 0;
 
   /// Request the writing of \a msg and coalesce it with trailing metadata which
-  /// contains \a status, using WriteOptions options with identifying tag \a
-  /// tag.
+  /// contains \a status, using WriteOptions options with
+  /// identifying tag \a tag.
   ///
   /// WriteAndFinish is equivalent of performing WriteLast and Finish in a
   /// single step.
@@ -623,6 +835,10 @@
                               const Status& status, void* tag) = 0;
 };
 
+/// Async server-side API for doing bidirectional streaming RPCs,
+/// where the incoming message stream coming from the client has messages of
+/// type \a R, and the outgoing message stream coming from the server has
+/// messages of type \a W.
 template <class W, class R>
 class ServerAsyncReaderWriter final
     : public ServerAsyncReaderWriterInterface<W, R> {
@@ -630,6 +846,13 @@
   explicit ServerAsyncReaderWriter(ServerContext* ctx)
       : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
 
+  /// See \a ServerAsyncStreamingInterface::SendInitialMetadata for semantics.
+  ///
+  /// Implicit input parameter:
+  ///   - The initial metadata that will be sent to the client from this op will
+  ///     be taken from the \a ServerContext associated with the call.
+  ///
+  /// \param[in] tag Tag identifying this request.
   void SendInitialMetadata(void* tag) override {
     GPR_CODEGEN_ASSERT(!ctx_->sent_initial_metadata_);
 
@@ -667,6 +890,14 @@
     call_.PerformOps(&write_ops_);
   }
 
+  /// See the \a ServerAsyncReaderWriterInterface.WriteAndFinish
+  /// method for semantics.
+  ///
+  /// Implicit input parameter:
+  ///   - the \a ServerContext associated with this call is used
+  ///     for sending trailing (and initial) metadata to the client.
+  ///
+  /// Note: \a status must have an OK code.
   void WriteAndFinish(const W& msg, WriteOptions options, const Status& status,
                       void* tag) override {
     write_ops_.set_output_tag(tag);
@@ -677,6 +908,14 @@
     call_.PerformOps(&write_ops_);
   }
 
+  /// See the \a ServerAsyncReaderWriterInterface.Finish method for semantics.
+  ///
+  /// Implicit input parameter:
+  ///   - the \a ServerContext associated with this call is used for sending
+  ///     trailing (and initial if not already sent) metadata to the client.
+  ///
+  /// Note: there are no restrictions are the code of \a status,
+  /// it may be non-OK
   void Finish(const Status& status, void* tag) override {
     finish_ops_.set_output_tag(tag);
     EnsureInitialMetadataSent(&finish_ops_);
diff --git a/include/grpc++/impl/codegen/async_unary_call.h b/include/grpc++/impl/codegen/async_unary_call.h
index a147a6a..aadf77d 100644
--- a/include/grpc++/impl/codegen/async_unary_call.h
+++ b/include/grpc++/impl/codegen/async_unary_call.h
@@ -47,18 +47,49 @@
 class CompletionQueue;
 extern CoreCodegenInterface* g_core_codegen_interface;
 
+/// An interface relevant for async client side unary RPCS (which send
+/// one request message to a server and receive one response message).
 template <class R>
 class ClientAsyncResponseReaderInterface {
  public:
   virtual ~ClientAsyncResponseReaderInterface() {}
+
+  /// Request notification of the reading of initial metadata. Completion
+  /// will be notified by \a tag on the associated completion queue.
+  /// This call is optional, but if it is used, it cannot be used concurrently
+  /// with or after the \a Finish method.
+  ///
+  /// \param[in] tag Tag identifying this request.
   virtual void ReadInitialMetadata(void* tag) = 0;
+
+  /// Request to receive the server's response \a msg and final \a status for
+  /// the call, and to notify \a tag on this call's completion queue when
+  /// finished.
+  ///
+  /// This function will return when either:
+  /// - when the server's response message and status have been received.
+  /// - when the server has returned a non-OK status (no message expected in
+  ///   this case).
+  /// - when the call failed for some reason and the library generated a
+  ///   non-OK status.
+  ///
+  /// \param[in] tag Tag identifying this request.
+  /// \param[out] status To be updated with the operation status.
+  /// \param[out] msg To be filled in with the server's response message.
   virtual void Finish(R* msg, Status* status, void* tag) = 0;
 };
 
+/// Async API for client-side unary RPCs, where the message response
+/// received from the server is of type \a R.
 template <class R>
 class ClientAsyncResponseReader final
     : public ClientAsyncResponseReaderInterface<R> {
  public:
+  /// Start a call and write the request out.
+  /// \a tag will be notified on \a cq when the call has been started (i.e.
+  /// intitial metadata sent) and \a request has been written out.
+  /// Note that \a context will be used to fill in custom initial metadata
+  /// used to send to the server when starting the call.
   template <class W>
   static ClientAsyncResponseReader* Create(ChannelInterface* channel,
                                            CompletionQueue* cq,
@@ -76,6 +107,12 @@
     assert(size == sizeof(ClientAsyncResponseReader));
   }
 
+  /// See \a ClientAsyncResponseReaderInterface::ReadInitialMetadata for
+  /// semantics.
+  ///
+  /// Side effect:
+  ///   - the \a ClientContext associated with this call is updated with
+  ///     possible initial and trailing metadata sent from the serve.
   void ReadInitialMetadata(void* tag) {
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
@@ -84,6 +121,11 @@
     call_.PerformOps(&meta_buf_);
   }
 
+  /// See \a ClientAysncResponseReaderInterface::Finish for semantics.
+  ///
+  /// Side effect:
+  ///   - the \a ClientContext associated with this call is updated with
+  ///     possible initial and trailing metadata sent from the server.
   void Finish(R* msg, Status* status, void* tag) {
     finish_buf_.set_output_tag(tag);
     if (!context_->initial_metadata_received_) {
@@ -123,12 +165,21 @@
       finish_buf_;
 };
 
+/// Async server-side API for handling unary calls, where the single
+/// response message sent to the client is of type \a W.
 template <class W>
 class ServerAsyncResponseWriter final : public ServerAsyncStreamingInterface {
  public:
   explicit ServerAsyncResponseWriter(ServerContext* ctx)
       : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
 
+  /// See \a ServerAsyncStreamingInterface::SendInitialMetadata for semantics.
+  ///
+  /// Side effect:
+  ///   The initial metadata that will be sent to the client from this op will
+  ///   be taken from the \a ServerContext associated with the call.
+  ///
+  /// \param[in] tag Tag identifying this request.
   void SendInitialMetadata(void* tag) override {
     GPR_CODEGEN_ASSERT(!ctx_->sent_initial_metadata_);
 
@@ -142,6 +193,21 @@
     call_.PerformOps(&meta_buf_);
   }
 
+  /// Indicate that the stream is to be finished and request notification
+  /// when the server has sent the appropriate signals to the client to
+  /// end the call. Should not be used concurrently with other operations.
+  ///
+  /// \param[in] tag Tag identifying this request.
+  /// \param[in] status To be sent to the client as the result of the call.
+  /// \param[in] msg Message to be sent to the client.
+  ///
+  /// Side effect:
+  ///   - also sends initial metadata if not already sent (using the
+  ///     \a ServerContext associated with this call).
+  ///
+  /// Note: if \a status has a non-OK code, then \a msg will not be sent,
+  /// and the client will receive only the status with possible trailing
+  /// metadata.
   void Finish(const W& msg, const Status& status, void* tag) {
     finish_buf_.set_output_tag(tag);
     if (!ctx_->sent_initial_metadata_) {
@@ -162,6 +228,18 @@
     call_.PerformOps(&finish_buf_);
   }
 
+  /// Indicate that the stream is to be finished with a non-OK status,
+  /// and request notification for when the server has finished sending the
+  /// appropriate signals to the client to end the call.
+  /// Should not be used concurrently with other operations.
+  ///
+  /// \param[in] tag Tag identifying this request.
+  /// \param[in] status To be sent to the client as the result of the call.
+  ///   - Note: \a status must have a non-OK code.
+  ///
+  /// Side effect:
+  ///   - also sends initial metadata if not already sent (using the
+  ///     \a ServerContext associated with this call).
   void FinishWithError(const Status& status, void* tag) {
     GPR_CODEGEN_ASSERT(!status.ok());
     finish_buf_.set_output_tag(tag);
diff --git a/include/grpc++/impl/codegen/call.h b/include/grpc++/impl/codegen/call.h
index 9fe2bbb..bbd0fc2 100644
--- a/include/grpc++/impl/codegen/call.h
+++ b/include/grpc++/impl/codegen/call.h
@@ -634,10 +634,10 @@
   }
 };
 
-// Straightforward wrapping of the C call object
+/// Straightforward wrapping of the C call object
 class Call final {
  public:
-  /* call is owned by the caller */
+  /** call is owned by the caller */
   Call(grpc_call* call, CallHook* call_hook, CompletionQueue* cq)
       : call_hook_(call_hook),
         cq_(cq),
diff --git a/include/grpc++/impl/codegen/call_hook.h b/include/grpc++/impl/codegen/call_hook.h
index 6a82582..85a5f86 100644
--- a/include/grpc++/impl/codegen/call_hook.h
+++ b/include/grpc++/impl/codegen/call_hook.h
@@ -39,7 +39,8 @@
 class CallOpSetInterface;
 class Call;
 
-/// Channel and Server implement this to allow them to hook performing ops
+/// This is an interface that Channel and Server implement to allow them to hook
+/// performing ops.
 class CallHook {
  public:
   virtual ~CallHook() {}
diff --git a/include/grpc++/impl/codegen/client_context.h b/include/grpc++/impl/codegen/client_context.h
index 3c50e6b..b1b9be0 100644
--- a/include/grpc++/impl/codegen/client_context.h
+++ b/include/grpc++/impl/codegen/client_context.h
@@ -151,6 +151,20 @@
 class InteropClientContextInspector;
 }  // namespace testing
 
+/// A ClientContext allows the person implementing a service client to:
+///
+/// - Add custom metadata key-value pairs that will propagated to the server
+///   side.
+/// - Control call settings such as compression and authentication.
+/// - Initial and trailing metadata coming from the server.
+/// - Get performance metrics (ie, census).
+///
+/// Context settings are only relevant to the call they are invoked with, that
+/// is to say, they aren't sticky. Some of these settings, such as the
+/// compression options, can be made persistant at channel construction time
+/// (see \a grpc::CreateCustomChannel).
+///
+/// \warning ClientContext instances should \em not be reused across rpcs.
 class ClientContext {
  public:
   ClientContext();
@@ -178,9 +192,8 @@
   ///
   /// \param meta_key The metadata key. If \a meta_value is binary data, it must
   /// end in "-bin".
-  /// \param meta_value The metadata value. If its value is binary, it must be
-  /// base64-encoding (see https://tools.ietf.org/html/rfc4648#section-4) and \a
-  /// meta_key must end in "-bin".
+  /// \param meta_value The metadata value. If its value is binary, the key name
+  /// must end in "-bin".
   void AddMetadata(const grpc::string& meta_key,
                    const grpc::string& meta_value);
 
@@ -222,13 +235,24 @@
     deadline_ = deadline_tp.raw_time();
   }
 
-  /// EXPERIMENTAL: Set this request to be idempotent
+  /// EXPERIMENTAL: Indicate that this request is idempotent.
+  /// By default, RPCs are assumed to <i>not</i> be idempotent.
+  ///
+  /// If true, the gRPC library assumes that it's safe to initiate
+  /// this RPC multiple times.
   void set_idempotent(bool idempotent) { idempotent_ = idempotent; }
 
-  /// EXPERIMENTAL: Set this request to be cacheable
+  /// EXPERIMENTAL: Set this request to be cacheable.
+  /// If set, grpc is free to use the HTTP GET verb for sending the request,
+  /// with the possibility of receiving a cached respone.
   void set_cacheable(bool cacheable) { cacheable_ = cacheable; }
 
-  /// EXPERIMENTAL: Trigger wait-for-ready or not on this request
+  /// EXPERIMENTAL: Trigger wait-for-ready or not on this request.
+  /// See https://github.com/grpc/grpc/blob/master/doc/wait-for-ready.md.
+  /// If set, if an RPC is made when a channel's connectivity state is
+  /// TRANSIENT_FAILURE or CONNECTING, the call will not "fail fast",
+  /// and the channel will wait until the channel is READY before making the
+  /// call.
   void set_wait_for_ready(bool wait_for_ready) {
     wait_for_ready_ = wait_for_ready;
     wait_for_ready_explicitly_set_ = true;
@@ -325,8 +349,8 @@
   };
   static void SetGlobalCallbacks(GlobalCallbacks* callbacks);
 
-  // Should be used for framework-level extensions only.
-  // Applications never need to call this method.
+  /// Should be used for framework-level extensions only.
+  /// Applications never need to call this method.
   grpc_call* c_call() { return call_; }
 
  private:
diff --git a/include/grpc++/impl/codegen/client_unary_call.h b/include/grpc++/impl/codegen/client_unary_call.h
index 4bf35ae..b923498 100644
--- a/include/grpc++/impl/codegen/client_unary_call.h
+++ b/include/grpc++/impl/codegen/client_unary_call.h
@@ -47,7 +47,7 @@
 class CompletionQueue;
 class RpcMethod;
 
-// Wrapper that performs a blocking unary call
+/// Wrapper that performs a blocking unary call
 template <class InputMessage, class OutputMessage>
 Status BlockingUnaryCall(ChannelInterface* channel, const RpcMethod& method,
                          ClientContext* context, const InputMessage& request,
diff --git a/include/grpc++/impl/codegen/completion_queue.h b/include/grpc++/impl/codegen/completion_queue.h
index c8ab726..57333d7 100644
--- a/include/grpc++/impl/codegen/completion_queue.h
+++ b/include/grpc++/impl/codegen/completion_queue.h
@@ -159,7 +159,8 @@
   /// will start to return false and \a AsyncNext will return \a
   /// NextStatus::SHUTDOWN. Only once either one of these methods does that
   /// (that is, once the queue has been \em drained) can an instance of this
-  /// class be destroyed.
+  /// class be destroyed. Also note that applications must ensure that
+  /// no work is enqueued on this completion queue after this method is called.
   void Shutdown();
 
   /// Returns a \em raw pointer to the underlying \a grpc_completion_queue
diff --git a/include/grpc++/impl/codegen/completion_queue_tag.h b/include/grpc++/impl/codegen/completion_queue_tag.h
index 19a0850..0affc81 100644
--- a/include/grpc++/impl/codegen/completion_queue_tag.h
+++ b/include/grpc++/impl/codegen/completion_queue_tag.h
@@ -40,10 +40,10 @@
 class CompletionQueueTag {
  public:
   virtual ~CompletionQueueTag() {}
-  // Called prior to returning from Next(), return value is the status of the
-  // operation (return status is the default thing to do). If this function
-  // returns false, the tag is dropped and not returned from the completion
-  // queue
+  /// Called prior to returning from Next(), return value is the status of the
+  /// operation (return status is the default thing to do). If this function
+  /// returns false, the tag is dropped and not returned from the completion
+  /// queue
   virtual bool FinalizeResult(void** tag, bool* status) = 0;
 };
 
diff --git a/include/grpc++/impl/codegen/config.h b/include/grpc++/impl/codegen/config.h
index a43bf65..79352ee 100644
--- a/include/grpc++/impl/codegen/config.h
+++ b/include/grpc++/impl/codegen/config.h
@@ -39,9 +39,9 @@
 #define GRPC_CUSTOM_STRING std::string
 #endif
 
-// The following macros are deprecated and appear only for users
-// with PB files generated using gRPC 1.0.x plugins. They should
-// not be used in new code
+/// The following macros are deprecated and appear only for users
+/// with PB files generated using gRPC 1.0.x plugins. They should
+/// not be used in new code
 #define GRPC_OVERRIDE override  // deprecated
 #define GRPC_FINAL final        // deprecated
 
diff --git a/include/grpc++/impl/codegen/method_handler_impl.h b/include/grpc++/impl/codegen/method_handler_impl.h
index 83b569c..8dfaf58 100644
--- a/include/grpc++/impl/codegen/method_handler_impl.h
+++ b/include/grpc++/impl/codegen/method_handler_impl.h
@@ -40,7 +40,7 @@
 
 namespace grpc {
 
-// A wrapper class of an application provided rpc method handler.
+/// A wrapper class of an application provided rpc method handler.
 template <class ServiceType, class RequestType, class ResponseType>
 class RpcMethodHandler : public MethodHandler {
  public:
@@ -77,7 +77,7 @@
   }
 
  private:
-  // Application provided rpc handler function.
+  /// Application provided rpc handler function.
   std::function<Status(ServiceType*, ServerContext*, const RequestType*,
                        ResponseType*)>
       func_;
@@ -85,7 +85,7 @@
   ServiceType* service_;
 };
 
-// A wrapper class of an application provided client streaming handler.
+/// A wrapper class of an application provided client streaming handler.
 template <class ServiceType, class RequestType, class ResponseType>
 class ClientStreamingHandler : public MethodHandler {
  public:
@@ -125,7 +125,7 @@
   ServiceType* service_;
 };
 
-// A wrapper class of an application provided server streaming handler.
+/// A wrapper class of an application provided server streaming handler.
 template <class ServiceType, class RequestType, class ResponseType>
 class ServerStreamingHandler : public MethodHandler {
  public:
@@ -166,13 +166,13 @@
   ServiceType* service_;
 };
 
-// A wrapper class of an application provided bidi-streaming handler.
-// This also applies to server-streamed implementation of a unary method
-// with the additional requirement that such methods must have done a
-// write for status to be ok
-// Since this is used by more than 1 class, the service is not passed in.
-// Instead, it is expected to be an implicitly-captured argument of func
-// (through bind or something along those lines)
+/// A wrapper class of an application provided bidi-streaming handler.
+/// This also applies to server-streamed implementation of a unary method
+/// with the additional requirement that such methods must have done a
+/// write for status to be ok
+/// Since this is used by more than 1 class, the service is not passed in.
+/// Instead, it is expected to be an implicitly-captured argument of func
+/// (through bind or something along those lines)
 template <class Streamer, bool WriteNeeded>
 class TemplatedBidiStreamingHandler : public MethodHandler {
  public:
@@ -249,7 +249,7 @@
             ServerSplitStreamer<RequestType, ResponseType>, false>(func) {}
 };
 
-// Handle unknown method by returning UNIMPLEMENTED error.
+/// Handle unknown method by returning UNIMPLEMENTED error.
 class UnknownMethodHandler : public MethodHandler {
  public:
   template <class T>
diff --git a/include/grpc++/impl/codegen/rpc_method.h b/include/grpc++/impl/codegen/rpc_method.h
index 4897428..ca75275 100644
--- a/include/grpc++/impl/codegen/rpc_method.h
+++ b/include/grpc++/impl/codegen/rpc_method.h
@@ -40,6 +40,7 @@
 
 namespace grpc {
 
+/// Descriptor of an RPC method
 class RpcMethod {
  public:
   enum RpcType {
diff --git a/include/grpc++/impl/codegen/rpc_service_method.h b/include/grpc++/impl/codegen/rpc_service_method.h
index eb8f9a1..96bb739 100644
--- a/include/grpc++/impl/codegen/rpc_service_method.h
+++ b/include/grpc++/impl/codegen/rpc_service_method.h
@@ -52,7 +52,7 @@
 class ServerContext;
 class StreamContextInterface;
 
-// Base class for running an RPC handler.
+/// Base class for running an RPC handler.
 class MethodHandler {
  public:
   virtual ~MethodHandler() {}
@@ -67,17 +67,17 @@
   virtual void RunHandler(const HandlerParameter& param) = 0;
 };
 
-// Server side rpc method class
+/// Server side rpc method class
 class RpcServiceMethod : public RpcMethod {
  public:
-  // Takes ownership of the handler
+  /// Takes ownership of the handler
   RpcServiceMethod(const char* name, RpcMethod::RpcType type,
                    MethodHandler* handler)
       : RpcMethod(name, type), server_tag_(nullptr), handler_(handler) {}
 
   void set_server_tag(void* tag) { server_tag_ = tag; }
   void* server_tag() const { return server_tag_; }
-  // if MethodHandler is nullptr, then this is an async method
+  /// if MethodHandler is nullptr, then this is an async method
   MethodHandler* handler() const { return handler_.get(); }
   void ResetHandler() { handler_.reset(); }
   void SetHandler(MethodHandler* handler) { handler_.reset(handler); }
diff --git a/include/grpc++/impl/codegen/security/auth_context.h b/include/grpc++/impl/codegen/security/auth_context.h
index 75f2482..e83877b 100644
--- a/include/grpc++/impl/codegen/security/auth_context.h
+++ b/include/grpc++/impl/codegen/security/auth_context.h
@@ -99,7 +99,7 @@
   virtual AuthPropertyIterator begin() const = 0;
   virtual AuthPropertyIterator end() const = 0;
 
-  // Mutation functions: should only be used by an AuthMetadataProcessor.
+  /// Mutation functions: should only be used by an AuthMetadataProcessor.
   virtual void AddProperty(const grpc::string& key,
                            const grpc::string_ref& value) = 0;
   virtual bool SetPeerIdentityPropertyName(const grpc::string& name) = 0;
diff --git a/include/grpc++/impl/codegen/server_context.h b/include/grpc++/impl/codegen/server_context.h
index ada304d..48967c2 100644
--- a/include/grpc++/impl/codegen/server_context.h
+++ b/include/grpc++/impl/codegen/server_context.h
@@ -91,63 +91,128 @@
 class ServerContextTestSpouse;
 }  // namespace testing
 
-// Interface of server side rpc context.
+/// A ServerContext allows the person implementing a service handler to:
+///
+/// - Add custom initial and trailing metadata key-value pairs that will
+///   propagated to the client side.
+/// - Control call settings such as compression and authentication.
+/// - Access metadata coming from the client.
+/// - Get performance metrics (ie, census).
+///
+/// Context settings are only relevant to the call handler they are supplied to,
+/// that is to say, they aren't sticky across multiple calls. Some of these
+/// settings, such as the compression options, can be made persistant at server
+/// construction time by specifying the approriate \a ChannelArguments
+/// to a \a grpc::ServerBuilder, via \a ServerBuilder::AddChannelArgument.
+///
+/// \warning ServerContext instances should \em not be reused across rpcs.
 class ServerContext {
  public:
   ServerContext();  // for async calls
   ~ServerContext();
 
+  /// Return the deadline for the server call.
   std::chrono::system_clock::time_point deadline() const {
     return Timespec2Timepoint(deadline_);
   }
 
+  /// Return a \a gpr_timespec representation of the server call's deadline.
   gpr_timespec raw_deadline() const { return deadline_; }
 
+  /// Add the (\a meta_key, \a meta_value) pair to the initial metadata
+  /// associated with a server call. These are made available at the client side
+  /// by the \a grpc::ClientContext::GetServerInitialMetadata() method.
+  ///
+  /// \warning This method should only be called before sending initial metadata
+  /// to the client (which can happen explicitly, or implicitly when sending a
+  /// a response message or status to the client).
+  ///
+  /// \param meta_key The metadata key. If \a meta_value is binary data, it must
+  /// end in "-bin".
+  /// \param meta_value The metadata value. If its value is binary, the key name
+  /// must end in "-bin".
   void AddInitialMetadata(const grpc::string& key, const grpc::string& value);
+
+  /// Add the (\a meta_key, \a meta_value) pair to the initial metadata
+  /// associated with a server call. These are made available at the client
+  /// side by the \a grpc::ClientContext::GetServerTrailingMetadata() method.
+  ///
+  /// \warning This method should only be called before sending trailing
+  /// metadata to the client (which happens when the call is finished and a
+  /// status is sent to the client).
+  ///
+  /// \param meta_key The metadata key. If \a meta_value is binary data,
+  /// it must end in "-bin".
+  /// \param meta_value The metadata value. If its value is binary, the key name
+  /// must end in "-bin".
   void AddTrailingMetadata(const grpc::string& key, const grpc::string& value);
 
-  // IsCancelled is always safe to call when using sync API
-  // When using async API, it is only safe to call IsCancelled after
-  // the AsyncNotifyWhenDone tag has been delivered
+  /// IsCancelled is always safe to call when using sync API.
+  /// When using async API, it is only safe to call IsCancelled after
+  /// the AsyncNotifyWhenDone tag has been delivered.
   bool IsCancelled() const;
 
-  // Cancel the Call from the server. This is a best-effort API and depending on
-  // when it is called, the RPC may still appear successful to the client.
-  // For example, if TryCancel() is called on a separate thread, it might race
-  // with the server handler which might return success to the client before
-  // TryCancel() was even started by the thread.
-  //
-  // It is the caller's responsibility to prevent such races and ensure that if
-  // TryCancel() is called, the serverhandler must return Status::CANCELLED. The
-  // only exception is that if the serverhandler is already returning an error
-  // status code, it is ok to not return Status::CANCELLED even if TryCancel()
-  // was called.
+  /// Cancel the Call from the server. This is a best-effort API and
+  /// depending on when it is called, the RPC may still appear successful to
+  /// the client.
+  /// For example, if TryCancel() is called on a separate thread, it might race
+  /// with the server handler which might return success to the client before
+  /// TryCancel() was even started by the thread.
+  ///
+  /// It is the caller's responsibility to prevent such races and ensure that if
+  /// TryCancel() is called, the serverhandler must return Status::CANCELLED.
+  /// The only exception is that if the serverhandler is already returning an
+  /// error status code, it is ok to not return Status::CANCELLED even if
+  /// TryCancel() was called.
   void TryCancel() const;
 
+  /// Return a collection of initial metadata key-value pairs sent from the
+  /// client. Note that keys may happen more than
+  /// once (ie, a \a std::multimap is returned).
+  ///
+  /// It is safe to use this method after initial metadata has been received,
+  /// Calls always begin with the client sending initial metadata, so this is
+  /// safe to access as soon as the call has begun on the server side.
+  ///
+  /// \return A multimap of initial metadata key-value pairs from the server.
   const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata()
       const {
     return *client_metadata_.map();
   }
 
+  /// Return the compression algorithm to be used by the server call.
   grpc_compression_level compression_level() const {
     return compression_level_;
   }
 
+  /// Set \a algorithm to be the compression algorithm used for the server call.
+  ///
+  /// \param algorithm The compression algorithm used for the server call.
   void set_compression_level(grpc_compression_level level) {
     compression_level_set_ = true;
     compression_level_ = level;
   }
 
+  /// Return a bool indicating whether the compression level for this call
+  /// has been set (either implicitly or through a previous call to
+  /// \a set_compression_level.
   bool compression_level_set() const { return compression_level_set_; }
 
+  /// Return the compression algorithm to be used by the server call.
   grpc_compression_algorithm compression_algorithm() const {
     return compression_algorithm_;
   }
+  /// Set \a algorithm to be the compression algorithm used for the server call.
+  ///
+  /// \param algorithm The compression algorithm used for the server call.
   void set_compression_algorithm(grpc_compression_algorithm algorithm);
 
-  // Set the load reporting costs in \a cost_data for the call.
+  /// Set the load reporting costs in \a cost_data for the call.
   void SetLoadReportingCosts(const std::vector<grpc::string>& cost_data);
 
+  /// Return the authentication context for this server call.
+  ///
+  /// \see grpc::AuthContext.
   std::shared_ptr<const AuthContext> auth_context() const {
     if (auth_context_.get() == nullptr) {
       auth_context_ = CreateAuthContext(call_);
@@ -155,24 +220,25 @@
     return auth_context_;
   }
 
-  // Return the peer uri in a string.
-  // WARNING: this value is never authenticated or subject to any security
-  // related code. It must not be used for any authentication related
-  // functionality. Instead, use auth_context.
+  /// Return the peer uri in a string.
+  /// WARNING: this value is never authenticated or subject to any security
+  /// related code. It must not be used for any authentication related
+  /// functionality. Instead, use auth_context.
   grpc::string peer() const;
 
+  /// Get the census context associated with this server call.
   const struct census_context* census_context() const;
 
-  // Async only. Has to be called before the rpc starts.
-  // Returns the tag in completion queue when the rpc finishes.
-  // IsCancelled() can then be called to check whether the rpc was cancelled.
+  /// Async only. Has to be called before the rpc starts.
+  /// Returns the tag in completion queue when the rpc finishes.
+  /// IsCancelled() can then be called to check whether the rpc was cancelled.
   void AsyncNotifyWhenDone(void* tag) {
     has_notify_when_done_tag_ = true;
     async_notify_when_done_tag_ = tag;
   }
 
-  // Should be used for framework-level extensions only.
-  // Applications never need to call this method.
+  /// Should be used for framework-level extensions only.
+  /// Applications never need to call this method.
   grpc_call* c_call() { return call_; }
 
  private:
@@ -205,14 +271,14 @@
   friend class UnknownMethodHandler;
   friend class ::grpc::ClientContext;
 
-  // Prevent copying.
+  /// Prevent copying.
   ServerContext(const ServerContext&);
   ServerContext& operator=(const ServerContext&);
 
   class CompletionOp;
 
   void BeginCompletionOp(Call* call);
-  // Return the tag queued by BeginCompletionOp()
+  /// Return the tag queued by BeginCompletionOp()
   CompletionQueueTag* GetCompletionOpTag();
 
   ServerContext(gpr_timespec deadline, grpc_metadata_array* arr);
diff --git a/include/grpc++/impl/codegen/service_type.h b/include/grpc++/impl/codegen/service_type.h
index bd65ea0..b880191 100644
--- a/include/grpc++/impl/codegen/service_type.h
+++ b/include/grpc++/impl/codegen/service_type.h
@@ -54,6 +54,12 @@
  public:
   virtual ~ServerAsyncStreamingInterface() {}
 
+  /// Request notification of the sending of initial metadata to the client.
+  /// Completion will be notified by \a tag on the associated completion
+  /// queue. This call is optional, but if it is used, it cannot be used
+  /// concurrently with or after the \a Finish method.
+  ///
+  /// \param[in] tag Tag identifying this request.
   virtual void SendInitialMetadata(void* tag) = 0;
 
  private:
@@ -61,6 +67,7 @@
   virtual void BindCall(Call* call) = 0;
 };
 
+/// Desriptor of an RPC service and its various RPC methods
 class Service {
  public:
   Service() : server_(nullptr) {}
@@ -155,7 +162,7 @@
     // From the server's point of view, streamed unary is a special
     // case of BIDI_STREAMING that has 1 read and 1 write, in that order,
     // and split server-side streaming is BIDI_STREAMING with 1 read and
-    // any number of writes, in that order
+    // any number of writes, in that order.
     methods_[index]->SetMethodType(::grpc::RpcMethod::BIDI_STREAMING);
   }
 
diff --git a/include/grpc++/impl/codegen/status_code_enum.h b/include/grpc++/impl/codegen/status_code_enum.h
index 9a90a18..c3d27fa 100644
--- a/include/grpc++/impl/codegen/status_code_enum.h
+++ b/include/grpc++/impl/codegen/status_code_enum.h
@@ -136,6 +136,11 @@
   /// The service is currently unavailable. This is a most likely a transient
   /// condition and may be corrected by retrying with a backoff.
   ///
+  /// \warning Although data MIGHT not have been transmitted when this
+  /// status occurs, there is NOT A GUARANTEE that the server has not seen
+  /// anything. So in general it is unsafe to retry on this status code
+  /// if the call is non-idempotent.
+  ///
   /// See litmus test above for deciding between FAILED_PRECONDITION, ABORTED,
   /// and UNAVAILABLE.
   UNAVAILABLE = 14,
diff --git a/include/grpc++/impl/codegen/string_ref.h b/include/grpc++/impl/codegen/string_ref.h
index 0037938..4ed11b1 100644
--- a/include/grpc++/impl/codegen/string_ref.h
+++ b/include/grpc++/impl/codegen/string_ref.h
@@ -55,14 +55,14 @@
 /// compatibility.
 class string_ref {
  public:
-  // types
+  /// types
   typedef const char* const_iterator;
   typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
 
-  // constants
+  /// constants
   const static size_t npos;
 
-  // construct/copy.
+  /// construct/copy.
   string_ref() : data_(nullptr), length_(0) {}
   string_ref(const string_ref& other)
       : data_(other.data_), length_(other.length_) {}
@@ -76,7 +76,7 @@
   string_ref(const char* s, size_t l) : data_(s), length_(l) {}
   string_ref(const grpc::string& s) : data_(s.data()), length_(s.length()) {}
 
-  // iterators
+  /// iterators
   const_iterator begin() const { return data_; }
   const_iterator end() const { return data_ + length_; }
   const_iterator cbegin() const { return data_; }
@@ -94,16 +94,16 @@
     return const_reverse_iterator(begin());
   }
 
-  // capacity
+  /// capacity
   size_t size() const { return length_; }
   size_t length() const { return length_; }
   size_t max_size() const { return length_; }
   bool empty() const { return length_ == 0; }
 
-  // element access
+  /// element access
   const char* data() const { return data_; }
 
-  // string operations
+  /// string operations
   int compare(string_ref x) const {
     size_t min_size = length_ < x.length_ ? length_ : x.length_;
     int r = memcmp(data_, x.data_, min_size);
@@ -144,7 +144,7 @@
   size_t length_;
 };
 
-// Comparison operators
+/// Comparison operators
 inline bool operator==(string_ref x, string_ref y) { return x.compare(y) == 0; }
 inline bool operator!=(string_ref x, string_ref y) { return x.compare(y) != 0; }
 inline bool operator<(string_ref x, string_ref y) { return x.compare(y) < 0; }
diff --git a/include/grpc++/impl/codegen/stub_options.h b/include/grpc++/impl/codegen/stub_options.h
index 8e966a8..41aef19 100644
--- a/include/grpc++/impl/codegen/stub_options.h
+++ b/include/grpc++/impl/codegen/stub_options.h
@@ -36,6 +36,7 @@
 
 namespace grpc {
 
+/// Useful interface for generated stubs
 class StubOptions {};
 
 }  // namespace grpc
diff --git a/include/grpc++/impl/codegen/sync_stream.h b/include/grpc++/impl/codegen/sync_stream.h
index a010924..db9048d 100644
--- a/include/grpc++/impl/codegen/sync_stream.h
+++ b/include/grpc++/impl/codegen/sync_stream.h
@@ -50,16 +50,30 @@
  public:
   virtual ~ClientStreamingInterface() {}
 
-  /// Wait until the stream finishes, and return the final status. When the
-  /// client side declares it has no more message to send, either implicitly or
-  /// by calling \a WritesDone(), it needs to make sure there is no more message
-  /// to be received from the server, either implicitly or by getting a false
-  /// from a \a Read().
+  /// Block waiting until the stream finishes and a final status of the call is
+  /// available.
+  ///
+  /// It is appropriate to call this method when both:
+  ///   * the calling code (client-side) has no more message to send
+  ///     (this can be declared implicitly by calling this method, or
+  ///     explicitly through an earlier call to <i>WritesDone</i> method of the
+  ///     class in use, e.g. \a ClientWriterInterface::WritesDone or
+  ///     \a ClientReaderWriterInterface::WritesDone).
+  ///   * there are no more messages to be received from the server (which can
+  ///     be known implicitly, or explicitly from an earlier call to \a
+  ///     ReaderInterface::Read that returned "false").
   ///
   /// This function will return either:
-  /// - when all incoming messages have been read and the server has returned
+  /// - when all incoming messages have been read and the server has
+  ///   returned status.
+  /// - when the server has returned a non-OK status.
+  /// - OR when the call failed for some reason and the library generated a
   ///   status.
-  /// - OR when the server has returned a non-OK status.
+  ///
+  /// Return values:
+  ///   - \a Status contains the status code, message and details for the call
+  ///   - the \a ClientContext associated with this call is updated with
+  ///     possible trailing metadata sent from the server.
   virtual Status Finish() = 0;
 };
 
@@ -68,7 +82,12 @@
  public:
   virtual ~ServerStreamingInterface() {}
 
-  /// Blocking send initial metadata to client.
+  /// Block to send initial metadata to client.
+  /// This call is optional, but if it is used, it cannot be used concurrently
+  /// with or after the \a Finish method.
+  ///
+  /// The initial metadata that will be sent to the client will be
+  /// taken from the \a ServerContext associated with the call.
   virtual void SendInitialMetadata() = 0;
 };
 
@@ -78,10 +97,11 @@
  public:
   virtual ~ReaderInterface() {}
 
-  /// Upper bound on the next message size available for reading on this stream
+  /// Get an upper bound on the next message size available for reading on this
+  /// stream.
   virtual bool NextMessageSize(uint32_t* sz) = 0;
 
-  /// Blocking read a message and parse to \a msg. Returns \a true on success.
+  /// Block to read a message and parse to \a msg. Returns \a true on success.
   /// This is thread-safe with respect to \a Write or \WritesDone methods on
   /// the same stream. It should not be called concurrently with another \a
   /// Read on the same stream as the order of delivery will not be defined.
@@ -100,8 +120,8 @@
  public:
   virtual ~WriterInterface() {}
 
-  /// Blocking write \a msg to the stream with WriteOptions \a options.
-  /// This is thread-safe with respect to \a Read
+  /// Block to write \a msg to the stream with WriteOptions \a options.
+  /// This is thread-safe with respect to \a ReaderInterface::Read
   ///
   /// \param msg The message to be written to the stream.
   /// \param options The WriteOptions affecting the write operation.
@@ -109,8 +129,8 @@
   /// \return \a true on success, \a false when the stream has been closed.
   virtual bool Write(const W& msg, WriteOptions options) = 0;
 
-  /// Blocking write \a msg to the stream with default write options.
-  /// This is thread-safe with respect to \a Read
+  /// Block to write \a msg to the stream with default write options.
+  /// This is thread-safe with respect to \a ReaderInterface::Read
   ///
   /// \param msg The message to be written to the stream.
   ///
@@ -122,12 +142,12 @@
   ///
   /// For client, WriteLast is equivalent of performing Write and WritesDone in
   /// a single step. \a msg and trailing metadata are coalesced and sent on wire
-  /// by calling this function.
-  /// For server, WriteLast buffers the \a msg. The writing of \a msg is held
-  /// until the service handler returns, where \a msg and trailing metadata are
-  /// coalesced and sent on wire. Note that WriteLast can only buffer \a msg up
-  /// to the flow control window size. If \a msg size is larger than the window
-  /// size, it will be sent on wire without buffering.
+  /// by calling this function. For server, WriteLast buffers the \a msg.
+  /// The writing of \a msg is held until the service handler returns,
+  /// where \a msg and trailing metadata are coalesced and sent on wire.
+  /// Note that WriteLast can only buffer \a msg up to the flow control window
+  /// size. If \a msg size is larger than the window size, it will be sent on
+  /// wire without buffering.
   ///
   /// \param[in] msg The message to be written to the stream.
   /// \param[in] options The WriteOptions to be used to write this message.
@@ -141,17 +161,22 @@
 class ClientReaderInterface : public ClientStreamingInterface,
                               public ReaderInterface<R> {
  public:
-  /// Blocking wait for initial metadata from server. The received metadata
+  /// Block to wait for initial metadata from server. The received metadata
   /// can only be accessed after this call returns. Should only be called before
   /// the first read. Calling this method is optional, and if it is not called
   /// the metadata will be available in ClientContext after the first read.
   virtual void WaitForInitialMetadata() = 0;
 };
 
+/// Synchronous (blocking) client-side API for doing server-streaming RPCs,
+/// where the stream of messages coming from the server has messages
+/// of type \a R.
 template <class R>
 class ClientReader final : public ClientReaderInterface<R> {
  public:
-  /// Blocking create a stream and write the first request out.
+  /// Block to create a stream and write the initial metadata and \a request
+  /// out. Note that \a context will be used to fill in custom initial
+  /// metadata used to send to the server when starting the call.
   template <class W>
   ClientReader(ChannelInterface* channel, const RpcMethod& method,
                ClientContext* context, const W& request)
@@ -172,6 +197,13 @@
     cq_.Pluck(&ops);
   }
 
+  /// See the \a ClientStreamingInterface.WaitForInitialMetadata method for
+  /// semantics.
+  ///
+  //  Side effect:
+  ///   Once complete, the initial metadata read from
+  ///   the server will be accessable through the \a ClientContext used to
+  ///   construct this object.
   void WaitForInitialMetadata() override {
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
@@ -186,6 +218,11 @@
     return true;
   }
 
+  /// See the \a ReaderInterface.Read method for semantics.
+  /// Side effect:
+  ///   This also receives initial metadata from the server, if not
+  ///   already received (if initial metadata is received, it can be then
+  ///   accessed through the \a ClientContext associated with this call).
   bool Read(R* msg) override {
     CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> ops;
     if (!context_->initial_metadata_received_) {
@@ -196,6 +233,11 @@
     return cq_.Pluck(&ops) && ops.got_message;
   }
 
+  /// See the \a ClientStreamingInterface.Finish method for semantics.
+  ///
+  /// Side effect:
+  ///   The \a ClientContext associated with this call is updated with
+  ///   possible metadata received from the server.
   Status Finish() override {
     CallOpSet<CallOpClientRecvStatus> ops;
     Status status;
@@ -211,23 +253,31 @@
   Call call_;
 };
 
-/// Client-side interface for streaming writes of message of type \a W.
+/// Client-side interface for streaming writes of message type \a W.
 template <class W>
 class ClientWriterInterface : public ClientStreamingInterface,
                               public WriterInterface<W> {
  public:
-  /// Half close writing from the client.
-  /// Block until currently-pending writes are completed.
-  /// Thread safe with respect to \a Read operations only
+  /// Half close writing from the client. (signal that the stream of messages
+  /// coming from the clinet is complete).
+  /// Blocks until currently-pending writes are completed.
+  /// Thread safe with respect to \a ReaderInterface::Read operations only
   ///
   /// \return Whether the writes were successful.
   virtual bool WritesDone() = 0;
 };
 
+/// Synchronous (blocking) client-side API for doing client-streaming RPCs,
+/// where the outgoing message stream coming from the client has messages of
+/// type \a W.
 template <class W>
 class ClientWriter : public ClientWriterInterface<W> {
  public:
-  /// Blocking create a stream.
+  /// Block to create a stream (i.e. send request headers and other initial
+  /// metadata to the server). Note that \a context will be used to fill
+  /// in custom initial metadata. \a response will be filled in with the
+  /// single expected response message from the server upon a successful
+  /// call to the \a Finish method of this instance.
   template <class R>
   ClientWriter(ChannelInterface* channel, const RpcMethod& method,
                ClientContext* context, R* response)
@@ -248,6 +298,12 @@
     }
   }
 
+  /// See the \a ClientStreamingInterface.WaitForInitialMetadata method for
+  /// semantics.
+  ///
+  //  Side effect:
+  ///   Once complete, the initial metadata read from the server will be
+  ///   accessable through the \a ClientContext used to construct this object.
   void WaitForInitialMetadata() {
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
@@ -257,6 +313,12 @@
     cq_.Pluck(&ops);  // status ignored
   }
 
+  /// See the WriterInterface.Write(const W& msg, WriteOptions options) method
+  /// for semantics.
+  ///
+  /// Side effect:
+  ///   Also sends initial metadata if not already sent (using the
+  ///   \a ClientContext associated with this call).
   using WriterInterface<W>::Write;
   bool Write(const W& msg, WriteOptions options) override {
     CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
@@ -287,7 +349,12 @@
     return cq_.Pluck(&ops);
   }
 
-  /// Read the final response and wait for the final status.
+  /// See the ClientStreamingInterface.Finish method for semantics.
+  /// Side effects:
+  ///   - Also receives initial metadata if not already received.
+  ///   - Attempts to fill in the \a response parameter passed
+  ///     to the constructor of this instance with the response
+  ///     message from the server.
   Status Finish() override {
     Status status;
     if (!context_->initial_metadata_received_) {
@@ -308,29 +375,39 @@
   Call call_;
 };
 
-/// Client-side interface for bi-directional streaming.
+/// Client-side interface for bi-directional streaming with
+/// client-to-server stream messages of type \a W and
+/// server-to-client stream messages of type \a R.
 template <class W, class R>
 class ClientReaderWriterInterface : public ClientStreamingInterface,
                                     public WriterInterface<W>,
                                     public ReaderInterface<R> {
  public:
-  /// Blocking wait for initial metadata from server. The received metadata
+  /// Block to wait for initial metadata from server. The received metadata
   /// can only be accessed after this call returns. Should only be called before
   /// the first read. Calling this method is optional, and if it is not called
   /// the metadata will be available in ClientContext after the first read.
   virtual void WaitForInitialMetadata() = 0;
 
-  /// Block until currently-pending writes are completed.
-  /// Thread-safe with respect to \a Read
+  /// Half close writing from the client. (signal that the stream of messages
+  /// coming from the clinet is complete).
+  /// Blocks until currently-pending writes are completed.
+  /// Thread-safe with respect to \a ReaderInterface::Read
   ///
   /// \return Whether the writes were successful.
   virtual bool WritesDone() = 0;
 };
 
+/// Synchronous (blocking) client-side API for bi-directional streaming RPCs,
+/// where the outgoing message stream coming from the client has messages of
+/// type \a W, and the incoming messages stream coming from the server has
+/// messages of type \a R.
 template <class W, class R>
 class ClientReaderWriter final : public ClientReaderWriterInterface<W, R> {
  public:
-  /// Blocking create a stream.
+  /// Block to create a stream and write the initial metadata and \a request
+  /// out. Note that \a context will be used to fill in custom initial metadata
+  /// used to send to the server when starting the call.
   ClientReaderWriter(ChannelInterface* channel, const RpcMethod& method,
                      ClientContext* context)
       : context_(context),
@@ -347,6 +424,12 @@
     }
   }
 
+  /// Block waiting to read initial metadata from the server.
+  /// This call is optional, but if it is used, it cannot be used concurrently
+  /// with or after the \a Finish method.
+  ///
+  /// Once complete, the initial metadata read from the server will be
+  /// accessable through the \a ClientContext used to construct this object.
   void WaitForInitialMetadata() override {
     GPR_CODEGEN_ASSERT(!context_->initial_metadata_received_);
 
@@ -361,6 +444,10 @@
     return true;
   }
 
+  /// See the \a ReaderInterface.Read method for semantics.
+  /// Side effect:
+  ///   Also receives initial metadata if not already received (updates the \a
+  ///   ClientContext associated with this call in that case).
   bool Read(R* msg) override {
     CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>> ops;
     if (!context_->initial_metadata_received_) {
@@ -371,6 +458,11 @@
     return cq_.Pluck(&ops) && ops.got_message;
   }
 
+  /// See the \a WriterInterface.Write method for semantics.
+  ///
+  /// Side effect:
+  ///   Also sends initial metadata if not already sent (using the
+  ///   \a ClientContext associated with this call to fill in values).
   using WriterInterface<W>::Write;
   bool Write(const W& msg, WriteOptions options) override {
     CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
@@ -401,6 +493,11 @@
     return cq_.Pluck(&ops);
   }
 
+  /// See the ClientStreamingInterface.Finish method for semantics.
+  ///
+  /// Side effect:
+  ///   - the \a ClientContext associated with this call is updated with
+  ///     possible trailing metadata sent from the server.
   Status Finish() override {
     CallOpSet<CallOpRecvInitialMetadata, CallOpClientRecvStatus> ops;
     if (!context_->initial_metadata_received_) {
@@ -424,11 +521,17 @@
 class ServerReaderInterface : public ServerStreamingInterface,
                               public ReaderInterface<R> {};
 
+/// Synchronous (blocking) server-side API for doing client-streaming RPCs,
+/// where the incoming message stream coming from the client has messages of
+/// type \a R.
 template <class R>
 class ServerReader final : public ServerReaderInterface<R> {
  public:
   ServerReader(Call* call, ServerContext* ctx) : call_(call), ctx_(ctx) {}
 
+  /// See the \a ServerStreamingInterface.SendInitialMetadata method
+  /// for semantics. Note that initial metadata will be affected by the
+  /// \a ServerContext associated with this call.
   void SendInitialMetadata() override {
     GPR_CODEGEN_ASSERT(!ctx_->sent_initial_metadata_);
 
@@ -465,11 +568,18 @@
 class ServerWriterInterface : public ServerStreamingInterface,
                               public WriterInterface<W> {};
 
+/// Synchronous (blocking) server-side API for doing for doing a
+/// server-streaming RPCs, where the outgoing message stream coming from the
+/// server has messages of type \a W.
 template <class W>
 class ServerWriter final : public ServerWriterInterface<W> {
  public:
   ServerWriter(Call* call, ServerContext* ctx) : call_(call), ctx_(ctx) {}
 
+  /// See the \a ServerStreamingInterface.SendInitialMetadata method
+  /// for semantics.
+  /// Note that initial metadata will be affected by the
+  /// \a ServerContext associated with this call.
   void SendInitialMetadata() override {
     GPR_CODEGEN_ASSERT(!ctx_->sent_initial_metadata_);
 
@@ -484,6 +594,11 @@
     call_->cq()->Pluck(&ops);
   }
 
+  /// See the \a WriterInterface.Write method for semantics.
+  ///
+  /// Side effect:
+  ///   Also sends initial metadata if not already sent (using the
+  ///   \a ClientContext associated with this call to fill in values).
   using WriterInterface<W>::Write;
   bool Write(const W& msg, WriteOptions options) override {
     if (options.is_last_message()) {
@@ -516,7 +631,7 @@
                                     public WriterInterface<W>,
                                     public ReaderInterface<R> {};
 
-// Actual implementation of bi-directional streaming
+/// Actual implementation of bi-directional streaming
 namespace internal {
 template <class W, class R>
 class ServerReaderWriterBody final {
@@ -576,12 +691,18 @@
 };
 }  // namespace internal
 
-// class to represent the user API for a bidirectional streaming call
+/// Synchronous (blocking) server-side API for a bidirectional
+/// streaming call, where the incoming message stream coming from the client has
+/// messages of type \a R, and the outgoing message streaming coming from
+/// the server has messages of type \a W.
 template <class W, class R>
 class ServerReaderWriter final : public ServerReaderWriterInterface<W, R> {
  public:
   ServerReaderWriter(Call* call, ServerContext* ctx) : body_(call, ctx) {}
 
+  /// See the \a ServerStreamingInterface.SendInitialMetadata method
+  /// for semantics. Note that initial metadata will be affected by the
+  /// \a ServerContext associated with this call.
   void SendInitialMetadata() override { body_.SendInitialMetadata(); }
 
   bool NextMessageSize(uint32_t* sz) override {
@@ -590,6 +711,11 @@
 
   bool Read(R* msg) override { return body_.Read(msg); }
 
+  /// See the \a WriterInterface.Write(const W& msg, WriteOptions options)
+  /// method for semantics.
+  /// Side effect:
+  ///   Also sends initial metadata if not already sent (using the \a
+  ///   ServerContext associated with this call).
   using WriterInterface<W>::Write;
   bool Write(const W& msg, WriteOptions options) override {
     return body_.Write(msg, options);
@@ -604,8 +730,7 @@
 /// through a unary call on the client side, but the server responds to it
 /// as though it were a single-ping-pong streaming call. The server can use
 /// the \a NextMessageSize method to determine an upper-bound on the size of
-/// the message.
-/// A key difference relative to streaming: ServerUnaryStreamer
+/// the message. A key difference relative to streaming: ServerUnaryStreamer
 /// must have exactly 1 Read and exactly 1 Write, in that order, to function
 /// correctly. Otherwise, the RPC is in error.
 template <class RequestType, class ResponseType>
@@ -615,12 +740,27 @@
   ServerUnaryStreamer(Call* call, ServerContext* ctx)
       : body_(call, ctx), read_done_(false), write_done_(false) {}
 
+  /// Block to send initial metadata to client.
+  /// Implicit input parameter:
+  ///    - the \a ServerContext associated with this call will be used for
+  ///      sending initial metadata.
   void SendInitialMetadata() override { body_.SendInitialMetadata(); }
 
+  /// Get an upper bound on the request message size from the client.
   bool NextMessageSize(uint32_t* sz) override {
     return body_.NextMessageSize(sz);
   }
 
+  /// Read a message of type \a R into \a msg. Completion will be notified by \a
+  /// tag on the associated completion queue.
+  /// This is thread-safe with respect to \a Write or \a WritesDone methods. It
+  /// should not be called concurrently with other streaming APIs
+  /// on the same stream. It is not meaningful to call it concurrently
+  /// with another \a ReaderInterface::Read on the same stream since reads on
+  /// the same stream are delivered in order.
+  ///
+  /// \param[out] msg Where to eventually store the read message.
+  /// \param[in] tag The tag identifying the operation.
   bool Read(RequestType* request) override {
     if (read_done_) {
       return false;
@@ -629,6 +769,13 @@
     return body_.Read(request);
   }
 
+  /// Block to write \a msg to the stream with WriteOptions \a options.
+  /// This is thread-safe with respect to \a ReaderInterface::Read
+  ///
+  /// \param msg The message to be written to the stream.
+  /// \param options The WriteOptions affecting the write operation.
+  ///
+  /// \return \a true on success, \a false when the stream has been closed.
   using WriterInterface<ResponseType>::Write;
   bool Write(const ResponseType& response, WriteOptions options) override {
     if (write_done_ || !read_done_) {
@@ -656,12 +803,27 @@
   ServerSplitStreamer(Call* call, ServerContext* ctx)
       : body_(call, ctx), read_done_(false) {}
 
+  /// Block to send initial metadata to client.
+  /// Implicit input parameter:
+  ///    - the \a ServerContext associated with this call will be used for
+  ///      sending initial metadata.
   void SendInitialMetadata() override { body_.SendInitialMetadata(); }
 
+  /// Get an upper bound on the request message size from the client.
   bool NextMessageSize(uint32_t* sz) override {
     return body_.NextMessageSize(sz);
   }
 
+  /// Read a message of type \a R into \a msg. Completion will be notified by \a
+  /// tag on the associated completion queue.
+  /// This is thread-safe with respect to \a Write or \a WritesDone methods. It
+  /// should not be called concurrently with other streaming APIs
+  /// on the same stream. It is not meaningful to call it concurrently
+  /// with another \a ReaderInterface::Read on the same stream since reads on
+  /// the same stream are delivered in order.
+  ///
+  /// \param[out] msg Where to eventually store the read message.
+  /// \param[in] tag The tag identifying the operation.
   bool Read(RequestType* request) override {
     if (read_done_) {
       return false;
@@ -670,6 +832,13 @@
     return body_.Read(request);
   }
 
+  /// Block to write \a msg to the stream with WriteOptions \a options.
+  /// This is thread-safe with respect to \a ReaderInterface::Read
+  ///
+  /// \param msg The message to be written to the stream.
+  /// \param options The WriteOptions affecting the write operation.
+  ///
+  /// \return \a true on success, \a false when the stream has been closed.
   using WriterInterface<ResponseType>::Write;
   bool Write(const ResponseType& response, WriteOptions options) override {
     return read_done_ && body_.Write(response, options);
diff --git a/include/grpc++/impl/codegen/time.h b/include/grpc++/impl/codegen/time.h
index e090ece..81ca7bb 100644
--- a/include/grpc++/impl/codegen/time.h
+++ b/include/grpc++/impl/codegen/time.h
@@ -39,17 +39,16 @@
 
 namespace grpc {
 
-/* If you are trying to use CompletionQueue::AsyncNext with a time class that
-   isn't either gpr_timespec or std::chrono::system_clock::time_point, you
-   will most likely be looking at this comment as your compiler will have
-   fired an error below. In order to fix this issue, you have two potential
-   solutions:
+/** If you are trying to use CompletionQueue::AsyncNext with a time class that
+    isn't either gpr_timespec or std::chrono::system_clock::time_point, you
+    will most likely be looking at this comment as your compiler will have
+    fired an error below. In order to fix this issue, you have two potential
+    solutions:
 
-     1. Use gpr_timespec or std::chrono::system_clock::time_point instead
-     2. Specialize the TimePoint class with whichever time class that you
-        want to use here. See below for two examples of how to do this.
+      1. Use gpr_timespec or std::chrono::system_clock::time_point instead
+      2. Specialize the TimePoint class with whichever time class that you
+         want to use here. See below for two examples of how to do this.
  */
-
 template <typename T>
 class TimePoint {
  public:
diff --git a/include/grpc++/impl/server_builder_plugin.h b/include/grpc++/impl/server_builder_plugin.h
index 61632e3..8f2bce5 100644
--- a/include/grpc++/impl/server_builder_plugin.h
+++ b/include/grpc++/impl/server_builder_plugin.h
@@ -43,24 +43,27 @@
 class ServerInitializer;
 class ChannelArguments;
 
+/// This interface is meant for internal usage only. Implementations of this
+/// interface should add themselves to a \a ServerBuilder instance through the
+/// \a InternalAddPluginFactory method.
 class ServerBuilderPlugin {
  public:
   virtual ~ServerBuilderPlugin() {}
   virtual grpc::string name() = 0;
 
-  // InitServer will be called in ServerBuilder::BuildAndStart(), after the
-  // Server instance is created.
+  /// InitServer will be called in ServerBuilder::BuildAndStart(), after the
+  /// Server instance is created.
   virtual void InitServer(ServerInitializer* si) = 0;
 
-  // Finish will be called at the end of ServerBuilder::BuildAndStart().
+  /// Finish will be called at the end of ServerBuilder::BuildAndStart().
   virtual void Finish(ServerInitializer* si) = 0;
 
-  // ChangeArguments is an interface that can be used in
-  // ServerBuilderOption::UpdatePlugins
+  /// ChangeArguments is an interface that can be used in
+  /// ServerBuilderOption::UpdatePlugins
   virtual void ChangeArguments(const grpc::string& name, void* value) = 0;
 
-  // UpdateChannelArguments will be called in ServerBuilder::BuildAndStart(),
-  // before the Server instance is created.
+  /// UpdateChannelArguments will be called in ServerBuilder::BuildAndStart(),
+  /// before the Server instance is created.
   virtual void UpdateChannelArguments(ChannelArguments* args) {}
 
   virtual bool has_sync_methods() const { return false; }
diff --git a/include/grpc++/resource_quota.h b/include/grpc++/resource_quota.h
index 68a5146..1199ae9 100644
--- a/include/grpc++/resource_quota.h
+++ b/include/grpc++/resource_quota.h
@@ -47,6 +47,7 @@
 /// all attached entities below the ResourceQuota bound.
 class ResourceQuota final : private GrpcLibraryCodegen {
  public:
+  /// \param name - a unique name for this ResourceQuota.
   explicit ResourceQuota(const grpc::string& name);
   ResourceQuota();
   ~ResourceQuota();
diff --git a/include/grpc++/security/auth_metadata_processor.h b/include/grpc++/security/auth_metadata_processor.h
index 1ae32d0..3536923 100644
--- a/include/grpc++/security/auth_metadata_processor.h
+++ b/include/grpc++/security/auth_metadata_processor.h
@@ -49,19 +49,19 @@
 
   virtual ~AuthMetadataProcessor() {}
 
-  // If this method returns true, the Process function will be scheduled in
-  // a different thread from the one processing the call.
+  /// If this method returns true, the Process function will be scheduled in
+  /// a different thread from the one processing the call.
   virtual bool IsBlocking() const { return true; }
 
-  // context is read/write: it contains the properties of the channel peer and
-  // it is the job of the Process method to augment it with properties derived
-  // from the passed-in auth_metadata.
-  // consumed_auth_metadata needs to be filled with metadata that has been
-  // consumed by the processor and will be removed from the call.
-  // response_metadata is the metadata that will be sent as part of the
-  // response.
-  // If the return value is not Status::OK, the rpc call will be aborted with
-  // the error code and error message sent back to the client.
+  /// context is read/write: it contains the properties of the channel peer and
+  /// it is the job of the Process method to augment it with properties derived
+  /// from the passed-in auth_metadata.
+  /// consumed_auth_metadata needs to be filled with metadata that has been
+  /// consumed by the processor and will be removed from the call.
+  /// response_metadata is the metadata that will be sent as part of the
+  /// response.
+  /// If the return value is not Status::OK, the rpc call will be aborted with
+  /// the error code and error message sent back to the client.
   virtual Status Process(const InputMetadata& auth_metadata,
                          AuthContext* context,
                          OutputMetadata* consumed_auth_metadata,
diff --git a/include/grpc++/security/credentials.h b/include/grpc++/security/credentials.h
index 59861b7..8d9d181 100644
--- a/include/grpc++/security/credentials.h
+++ b/include/grpc++/security/credentials.h
@@ -204,23 +204,23 @@
 /// Credentials for a channel using Cronet.
 std::shared_ptr<ChannelCredentials> CronetChannelCredentials(void* engine);
 
-// User defined metadata credentials.
+/// User defined metadata credentials.
 class MetadataCredentialsPlugin {
  public:
   virtual ~MetadataCredentialsPlugin() {}
 
-  // If this method returns true, the Process function will be scheduled in
-  // a different thread from the one processing the call.
+  /// If this method returns true, the Process function will be scheduled in
+  /// a different thread from the one processing the call.
   virtual bool IsBlocking() const { return true; }
 
-  // Type of credentials this plugin is implementing.
+  /// Type of credentials this plugin is implementing.
   virtual const char* GetType() const { return ""; }
 
-  // Gets the auth metatada produced by this plugin.
-  // The fully qualified method name is:
-  // service_url + "/" + method_name.
-  // The channel_auth_context contains (among other things), the identity of
-  // the server.
+  /// Gets the auth metatada produced by this plugin.
+  /// The fully qualified method name is:
+  /// service_url + "/" + method_name.
+  /// The channel_auth_context contains (among other things), the identity of
+  /// the server.
   virtual Status GetMetadata(
       grpc::string_ref service_url, grpc::string_ref method_name,
       const AuthContext& channel_auth_context,
diff --git a/include/grpc++/security/server_credentials.h b/include/grpc++/security/server_credentials.h
index 229bab8..4676b04 100644
--- a/include/grpc++/security/server_credentials.h
+++ b/include/grpc++/security/server_credentials.h
@@ -46,13 +46,13 @@
 namespace grpc {
 class Server;
 
-// Wrapper around \a grpc_server_credentials, a way to authenticate a server.
+/// Wrapper around \a grpc_server_credentials, a way to authenticate a server.
 class ServerCredentials {
  public:
   virtual ~ServerCredentials();
 
-  // This method is not thread-safe and has to be called before the server is
-  // started. The last call to this function wins.
+  /// This method is not thread-safe and has to be called before the server is
+  /// started. The last call to this function wins.
   virtual void SetAuthMetadataProcessor(
       const std::shared_ptr<AuthMetadataProcessor>& processor) = 0;
 
@@ -70,7 +70,7 @@
 
 /// Options to create ServerCredentials with SSL
 struct SslServerCredentialsOptions {
-  // Deprecated
+  /// Deprecated
   SslServerCredentialsOptions()
       : force_client_auth(false),
         client_certificate_request(GRPC_SSL_DONT_REQUEST_CLIENT_CERTIFICATE) {}
@@ -84,12 +84,12 @@
   };
   grpc::string pem_root_certs;
   std::vector<PemKeyCertPair> pem_key_cert_pairs;
-  // Deprecated
+  /// Deprecated
   bool force_client_auth;
 
-  // If both force_client_auth and client_certificate_request fields are set,
-  // force_client_auth takes effect i.e
-  // REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY will be enforced.
+  /// If both force_client_auth and client_certificate_request fields are set,
+  /// force_client_auth takes effect i.e
+  /// REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY will be enforced.
   grpc_ssl_client_certificate_request_type client_certificate_request;
 };
 
diff --git a/include/grpc++/server_builder.h b/include/grpc++/server_builder.h
index a56f81d..2185b28 100644
--- a/include/grpc++/server_builder.h
+++ b/include/grpc++/server_builder.h
@@ -46,6 +46,7 @@
 #include <grpc/compression.h>
 #include <grpc/support/cpu.h>
 #include <grpc/support/useful.h>
+#include <grpc/support/workaround_list.h>
 
 struct grpc_resource_quota;
 
@@ -184,6 +185,11 @@
   static void InternalAddPluginFactory(
       std::unique_ptr<ServerBuilderPlugin> (*CreatePlugin)());
 
+  /// Enable a server workaround. Do not use unless you know what the workaround
+  /// does. For explanation and detailed descriptions of workarounds, see
+  /// doc/workarounds.md.
+  ServerBuilder& EnableWorkaround(grpc_workaround_list id);
+
  private:
   friend class ::grpc::testing::ServerBuilderPluginTest;
 
@@ -195,7 +201,7 @@
 
   struct SyncServerSettings {
     SyncServerSettings()
-        : num_cqs(gpr_cpu_num_cores()),
+        : num_cqs(GPR_MAX(1, gpr_cpu_num_cores())),
           min_pollers(1),
           max_pollers(2),
           cq_timeout_msec(10000) {}
diff --git a/include/grpc++/support/error_details.h b/include/grpc++/support/error_details.h
index 411175f..d4324d3 100644
--- a/include/grpc++/support/error_details.h
+++ b/include/grpc++/support/error_details.h
@@ -44,16 +44,16 @@
 
 namespace grpc {
 
-// Maps a grpc::Status to a google::rpc::Status.
-// The given \a to object will be cleared.
-// On success, returns status with OK.
-// Returns status with INVALID_ARGUMENT, if failed to deserialize.
-// Returns status with FAILED_PRECONDITION, if \a to is nullptr.
+/// Maps a grpc::Status to a google::rpc::Status.
+/// The given \a to object will be cleared.
+/// On success, returns status with OK.
+/// Returns status with INVALID_ARGUMENT, if failed to deserialize.
+/// Returns status with FAILED_PRECONDITION, if \a to is nullptr.
 Status ExtractErrorDetails(const Status& from, ::google::rpc::Status* to);
 
-// Maps google::rpc::Status to a grpc::Status.
-// Returns OK on success.
-// Returns status with FAILED_PRECONDITION if \a to is nullptr.
+/// Maps google::rpc::Status to a grpc::Status.
+/// Returns OK on success.
+/// Returns status with FAILED_PRECONDITION if \a to is nullptr.
 Status SetErrorDetails(const ::google::rpc::Status& from, Status* to);
 
 }  // namespace grpc
diff --git a/include/grpc++/test/mock_stream.h b/include/grpc++/test/mock_stream.h
index f2de947..f6e94a4 100644
--- a/include/grpc++/test/mock_stream.h
+++ b/include/grpc++/test/mock_stream.h
@@ -50,14 +50,14 @@
  public:
   MockClientReader() = default;
 
-  // ClientStreamingInterface
+  /// ClientStreamingInterface
   MOCK_METHOD0_T(Finish, Status());
 
-  // ReaderInterface
+  /// ReaderInterface
   MOCK_METHOD1_T(NextMessageSize, bool(uint32_t*));
   MOCK_METHOD1_T(Read, bool(R*));
 
-  // ClientReaderInterface
+  /// ClientReaderInterface
   MOCK_METHOD0_T(WaitForInitialMetadata, void());
 };
 
@@ -66,13 +66,13 @@
  public:
   MockClientWriter() = default;
 
-  // ClientStreamingInterface
+  /// ClientStreamingInterface
   MOCK_METHOD0_T(Finish, Status());
 
-  // WriterInterface
+  /// WriterInterface
   MOCK_METHOD2_T(Write, bool(const W&, const WriteOptions));
 
-  // ClientWriterInterface
+  /// ClientWriterInterface
   MOCK_METHOD0_T(WritesDone, bool());
 };
 
@@ -81,22 +81,22 @@
  public:
   MockClientReaderWriter() = default;
 
-  // ClientStreamingInterface
+  /// ClientStreamingInterface
   MOCK_METHOD0_T(Finish, Status());
 
-  // ReaderInterface
+  /// ReaderInterface
   MOCK_METHOD1_T(NextMessageSize, bool(uint32_t*));
   MOCK_METHOD1_T(Read, bool(R*));
 
-  // WriterInterface
+  /// WriterInterface
   MOCK_METHOD2_T(Write, bool(const W&, const WriteOptions));
 
-  // ClientReaderWriterInterface
+  /// ClientReaderWriterInterface
   MOCK_METHOD0_T(WaitForInitialMetadata, void());
   MOCK_METHOD0_T(WritesDone, bool());
 };
 
-// TODO: We do not support mocking an async RPC for now.
+/// TODO: We do not support mocking an async RPC for now.
 
 template <class R>
 class MockClientAsyncResponseReader
@@ -113,11 +113,11 @@
  public:
   MockClientAsyncReader() = default;
 
-  // ClientAsyncStreamingInterface
+  /// ClientAsyncStreamingInterface
   MOCK_METHOD1_T(ReadInitialMetadata, void(void*));
   MOCK_METHOD2_T(Finish, void(Status*, void*));
 
-  // AsyncReaderInterface
+  /// AsyncReaderInterface
   MOCK_METHOD2_T(Read, void(R*, void*));
 };
 
@@ -126,14 +126,14 @@
  public:
   MockClientAsyncWriter() = default;
 
-  // ClientAsyncStreamingInterface
+  /// ClientAsyncStreamingInterface
   MOCK_METHOD1_T(ReadInitialMetadata, void(void*));
   MOCK_METHOD2_T(Finish, void(Status*, void*));
 
-  // AsyncWriterInterface
+  /// AsyncWriterInterface
   MOCK_METHOD2_T(Write, void(const W&, void*));
 
-  // ClientAsyncWriterInterface
+  /// ClientAsyncWriterInterface
   MOCK_METHOD1_T(WritesDone, void(void*));
 };
 
@@ -143,17 +143,17 @@
  public:
   MockClientAsyncReaderWriter() = default;
 
-  // ClientAsyncStreamingInterface
+  /// ClientAsyncStreamingInterface
   MOCK_METHOD1_T(ReadInitialMetadata, void(void*));
   MOCK_METHOD2_T(Finish, void(Status*, void*));
 
-  // AsyncWriterInterface
+  /// AsyncWriterInterface
   MOCK_METHOD2_T(Write, void(const W&, void*));
 
-  // AsyncReaderInterface
+  /// AsyncReaderInterface
   MOCK_METHOD2_T(Read, void(R*, void*));
 
-  // ClientAsyncReaderWriterInterface
+  /// ClientAsyncReaderWriterInterface
   MOCK_METHOD1_T(WritesDone, void(void*));
 };
 
diff --git a/include/grpc++/test/server_context_test_spouse.h b/include/grpc++/test/server_context_test_spouse.h
index bac0db7..5bd07e7 100644
--- a/include/grpc++/test/server_context_test_spouse.h
+++ b/include/grpc++/test/server_context_test_spouse.h
@@ -41,13 +41,13 @@
 namespace grpc {
 namespace testing {
 
-// A test-only class to access private members and methods of ServerContext.
+/// A test-only class to access private members and methods of ServerContext.
 class ServerContextTestSpouse {
  public:
   explicit ServerContextTestSpouse(ServerContext* ctx) : ctx_(ctx) {}
 
-  // Inject client metadata to the ServerContext for the test. The test spouse
-  // must be alive when ServerContext::client_metadata is called.
+  /// Inject client metadata to the ServerContext for the test. The test spouse
+  /// must be alive when ServerContext::client_metadata is called.
   void AddClientMetadata(const grpc::string& key, const grpc::string& value) {
     client_metadata_storage_.insert(
         std::pair<grpc::string, grpc::string>(key, value));
@@ -70,7 +70,7 @@
   }
 
  private:
-  ServerContext* ctx_;  // not owned
+  ServerContext* ctx_;  /// not owned
   std::multimap<grpc::string, grpc::string> client_metadata_storage_;
 };
 
diff --git a/include/grpc/census.h b/include/grpc/census.h
index 822c42c..68cefd8 100644
--- a/include/grpc/census.h
+++ b/include/grpc/census.h
@@ -31,7 +31,7 @@
  *
  */
 
-/* RPC-internal Census API's. These are designed to be generic enough that
+/** RPC-internal Census API's. These are designed to be generic enough that
  * they can (ultimately) be used in many different RPC systems (with differing
  * implementations). */
 
@@ -44,12 +44,12 @@
 extern "C" {
 #endif
 
-/* Identify census features that can be enabled via census_initialize(). */
+/** Identify census features that can be enabled via census_initialize(). */
 enum census_features {
-  CENSUS_FEATURE_NONE = 0,    /* Do not enable census. */
-  CENSUS_FEATURE_TRACING = 1, /* Enable census tracing. */
-  CENSUS_FEATURE_STATS = 2,   /* Enable Census stats collection. */
-  CENSUS_FEATURE_CPU = 4,     /* Enable Census CPU usage collection. */
+  CENSUS_FEATURE_NONE = 0,    /** Do not enable census. */
+  CENSUS_FEATURE_TRACING = 1, /** Enable census tracing. */
+  CENSUS_FEATURE_STATS = 2,   /** Enable Census stats collection. */
+  CENSUS_FEATURE_CPU = 4,     /** Enable Census CPU usage collection. */
   CENSUS_FEATURE_ALL =
       CENSUS_FEATURE_TRACING | CENSUS_FEATURE_STATS | CENSUS_FEATURE_CPU
 };
@@ -82,7 +82,7 @@
   metrics will be recorded. Keys are unique within a context. */
 typedef struct census_context census_context;
 
-/* A tag is a key:value pair. Both keys and values are nil-terminated strings,
+/** A tag is a key:value pair. Both keys and values are nil-terminated strings,
    containing printable ASCII characters (decimal 32-126). Keys must be at
    least one character in length. Both keys and values can have at most
    CENSUS_MAX_TAG_KB_LEN characters (including the terminating nil). The
@@ -97,36 +97,36 @@
   uint8_t flags;
 } census_tag;
 
-/* Maximum length of a tag's key or value. */
+/** Maximum length of a tag's key or value. */
 #define CENSUS_MAX_TAG_KV_LEN 255
-/* Maximum number of propagatable tags. */
+/** Maximum number of propagatable tags. */
 #define CENSUS_MAX_PROPAGATED_TAGS 255
 
-/* Tag flags. */
-#define CENSUS_TAG_PROPAGATE 1 /* Tag should be propagated over RPC */
-#define CENSUS_TAG_STATS 2     /* Tag will be used for statistics aggregation */
-#define CENSUS_TAG_RESERVED 4  /* Reserved for internal use. */
-/* Flag values 4,8,16,32,64,128 are reserved for future/internal use. Clients
+/** Tag flags. */
+#define CENSUS_TAG_PROPAGATE 1 /** Tag should be propagated over RPC */
+#define CENSUS_TAG_STATS 2    /** Tag will be used for statistics aggregation */
+#define CENSUS_TAG_RESERVED 4 /** Reserved for internal use. */
+/** Flag values 4,8,16,32,64,128 are reserved for future/internal use. Clients
    should not use or rely on their values. */
 
 #define CENSUS_TAG_IS_PROPAGATED(flags) (flags & CENSUS_TAG_PROPAGATE)
 #define CENSUS_TAG_IS_STATS(flags) (flags & CENSUS_TAG_STATS)
 
-/* An instance of this structure is kept by every context, and records the
+/** An instance of this structure is kept by every context, and records the
    basic information associated with the creation of that context. */
 typedef struct {
-  int n_propagated_tags; /* number of propagated tags */
-  int n_local_tags;      /* number of non-propagated (local) tags */
-  int n_deleted_tags;    /* number of tags that were deleted */
-  int n_added_tags;      /* number of tags that were added */
-  int n_modified_tags;   /* number of tags that were modified */
-  int n_invalid_tags;    /* number of tags with bad keys or values (e.g.
+  int n_propagated_tags; /** number of propagated tags */
+  int n_local_tags;      /** number of non-propagated (local) tags */
+  int n_deleted_tags;    /** number of tags that were deleted */
+  int n_added_tags;      /** number of tags that were added */
+  int n_modified_tags;   /** number of tags that were modified */
+  int n_invalid_tags;    /** number of tags with bad keys or values (e.g.
                             longer than CENSUS_MAX_TAG_KV_LEN) */
-  int n_ignored_tags;    /* number of tags ignored because of
+  int n_ignored_tags;    /** number of tags ignored because of
                             CENSUS_MAX_PROPAGATED_TAGS limit. */
 } census_context_status;
 
-/* Create a new context, adding and removing tags from an existing context.
+/** Create a new context, adding and removing tags from an existing context.
    This will copy all tags from the 'tags' input, so it is recommended
    to add as many tags in a single operation as is practical for the client.
    @param base Base context to build upon. Can be NULL.
@@ -148,15 +148,15 @@
     const census_context *base, const census_tag *tags, int ntags,
     census_context_status const **status);
 
-/* Destroy a context. Once this function has been called, the context cannot
+/** Destroy a context. Once this function has been called, the context cannot
    be reused. */
 CENSUSAPI void census_context_destroy(census_context *context);
 
-/* Get a pointer to the original status from the context creation. */
+/** Get a pointer to the original status from the context creation. */
 CENSUSAPI const census_context_status *census_context_get_status(
     const census_context *context);
 
-/* Structure used for iterating over the tags in a context. API clients should
+/** Structure used for iterating over the tags in a context. API clients should
    not use or reference internal fields - neither their contents or
    presence/absence are guaranteed. */
 typedef struct {
@@ -166,25 +166,25 @@
   char *kvm;
 } census_context_iterator;
 
-/* Initialize a census_tag_iterator. Must be called before first use. */
+/** Initialize a census_tag_iterator. Must be called before first use. */
 CENSUSAPI void census_context_initialize_iterator(
     const census_context *context, census_context_iterator *iterator);
 
-/* Get the contents of the "next" tag in the context. If there are no more
+/** Get the contents of the "next" tag in the context. If there are no more
    tags, returns 0 (and 'tag' contents will be unchanged), otherwise returns 1.
    */
 CENSUSAPI int census_context_next_tag(census_context_iterator *iterator,
                                       census_tag *tag);
 
-/* Get a context tag by key. Returns 0 if the key is not present. */
+/** Get a context tag by key. Returns 0 if the key is not present. */
 CENSUSAPI int census_context_get_tag(const census_context *context,
                                      const char *key, census_tag *tag);
 
-/* Tag set encode/decode functionality. These functions are intended
+/** Tag set encode/decode functionality. These functions are intended
    for use by RPC systems only, for purposes of transmitting/receiving contexts.
    */
 
-/* Encode a context into a buffer.
+/** Encode a context into a buffer.
    @param context context to be encoded
    @param buffer buffer into which the context will be encoded.
    @param buf_size number of available bytes in buffer.
@@ -193,15 +193,15 @@
 CENSUSAPI size_t census_context_encode(const census_context *context,
                                        char *buffer, size_t buf_size);
 
-/* Decode context buffer encoded with census_context_encode(). Returns NULL
+/** Decode context buffer encoded with census_context_encode(). Returns NULL
    if there is an error in parsing either buffer. */
 CENSUSAPI census_context *census_context_decode(const char *buffer,
                                                 size_t size);
 
-/* Distributed traces can have a number of options. */
+/** Distributed traces can have a number of options. */
 enum census_trace_mask_values {
-  CENSUS_TRACE_MASK_NONE = 0,      /* Default, empty flags */
-  CENSUS_TRACE_MASK_IS_SAMPLED = 1 /* RPC tracing enabled for this context. */
+  CENSUS_TRACE_MASK_NONE = 0,      /** Default, empty flags */
+  CENSUS_TRACE_MASK_IS_SAMPLED = 1 /** RPC tracing enabled for this context. */
 };
 
 /** Get the current trace mask associated with this context. The value returned
@@ -211,7 +211,7 @@
 /** Set the trace mask associated with a context. */
 CENSUSAPI void census_set_trace_mask(int trace_mask);
 
-/* The concept of "operation" is a fundamental concept for Census. In an RPC
+/** The concept of "operation" is a fundamental concept for Census. In an RPC
    system, an operation typically represents a single RPC, or a significant
    sub-part thereof (e.g. a single logical "read" RPC to a distributed storage
    system might do several other actions in parallel, from looking up metadata
@@ -238,7 +238,7 @@
   at which an operation begins.
 */
 typedef struct {
-  /* Use gpr_timespec for default implementation. High performance
+  /** Use gpr_timespec for default implementation. High performance
    * implementations should use a cycle-counter based timestamp. */
   gpr_timespec ts;
 } census_timestamp;
@@ -398,12 +398,12 @@
 
 /** Trace record. */
 typedef struct {
-  census_timestamp timestamp; /* Time of record creation */
-  uint64_t trace_id;          /* Trace ID associated with record */
-  uint64_t op_id;             /* Operation ID associated with record */
-  uint32_t type;              /* Type (as used in census_trace_print() */
-  const char *buffer;         /* Buffer (from census_trace_print() */
-  size_t buf_size;            /* Number of bytes inside buffer */
+  census_timestamp timestamp; /** Time of record creation */
+  uint64_t trace_id;          /** Trace ID associated with record */
+  uint64_t op_id;             /** Operation ID associated with record */
+  uint32_t type;              /** Type (as used in census_trace_print() */
+  const char *buffer;         /** Buffer (from census_trace_print() */
+  size_t buf_size;            /** Number of bytes inside buffer */
 } census_trace_record;
 
 /** Start a scan of existing trace records. While a scan is ongoing, addition
@@ -431,7 +431,7 @@
 /** End a scan previously started by census_trace_scan_start() */
 CENSUSAPI void census_trace_scan_end();
 
-/* Core stats collection API's. The following concepts are used:
+/** Core stats collection API's. The following concepts are used:
    * Resource: Users record measurements for a single resource. Examples
      include RPC latency, CPU seconds consumed, and bytes transmitted.
    * Aggregation: An aggregation of a set of measurements. Census supports the
@@ -450,7 +450,7 @@
   implementations. The proto definitions can be found in src/proto/census.
 */
 
-/* Define a new resource. `resource_pb` should contain an encoded Resource
+/** Define a new resource. `resource_pb` should contain an encoded Resource
    protobuf, `resource_pb_size` being the size of the buffer. Returns a -ve
    value on error, or a positive (>= 0) resource id (for use in
    census_delete_resource() and census_record_values()). In order to be valid, a
@@ -459,21 +459,21 @@
 CENSUSAPI int32_t census_define_resource(const uint8_t *resource_pb,
                                          size_t resource_pb_size);
 
-/* Delete a resource created by census_define_resource(). */
+/** Delete a resource created by census_define_resource(). */
 CENSUSAPI void census_delete_resource(int32_t resource_id);
 
-/* Determine the id of a resource, given its name. returns -1 if the resource
+/** Determine the id of a resource, given its name. returns -1 if the resource
    does not exist. */
 CENSUSAPI int32_t census_resource_id(const char *name);
 
-/* A single value to be recorded comprises two parts: an ID for the particular
+/** A single value to be recorded comprises two parts: an ID for the particular
  * resource and the value to be recorded against it. */
 typedef struct {
   int32_t resource_id;
   double value;
 } census_value;
 
-/* Record new usage values against the given context. */
+/** Record new usage values against the given context. */
 CENSUSAPI void census_record_values(census_context *context,
                                     census_value *values, size_t nvalues);
 
diff --git a/include/grpc/grpc.h b/include/grpc/grpc.h
index 1eeb075..a36367f 100644
--- a/include/grpc/grpc.h
+++ b/include/grpc/grpc.h
@@ -287,7 +287,7 @@
 /** Close and destroy a grpc channel */
 GRPCAPI void grpc_channel_destroy(grpc_channel *channel);
 
-/* Error handling for grpc_call
+/** Error handling for grpc_call
    Most grpc_call functions return a grpc_error. If the error is not GRPC_OK
    then the operation failed due to some unsatisfied precondition.
    If a grpc_call fails, it's guaranteed that no change to the call state
diff --git a/include/grpc/grpc_security.h b/include/grpc/grpc_security.h
index 5d3cc4f..4f35506 100644
--- a/include/grpc/grpc_security.h
+++ b/include/grpc/grpc_security.h
@@ -42,7 +42,7 @@
 extern "C" {
 #endif
 
-/* --- Authentication Context. --- */
+/** --- Authentication Context. --- */
 
 typedef struct grpc_auth_context grpc_auth_context;
 
@@ -52,84 +52,84 @@
   const char *name;
 } grpc_auth_property_iterator;
 
-/* value, if not NULL, is guaranteed to be NULL terminated. */
+/** value, if not NULL, is guaranteed to be NULL terminated. */
 typedef struct grpc_auth_property {
   char *name;
   char *value;
   size_t value_length;
 } grpc_auth_property;
 
-/* Returns NULL when the iterator is at the end. */
+/** Returns NULL when the iterator is at the end. */
 GRPCAPI const grpc_auth_property *grpc_auth_property_iterator_next(
     grpc_auth_property_iterator *it);
 
-/* Iterates over the auth context. */
+/** Iterates over the auth context. */
 GRPCAPI grpc_auth_property_iterator
 grpc_auth_context_property_iterator(const grpc_auth_context *ctx);
 
-/* Gets the peer identity. Returns an empty iterator (first _next will return
+/** Gets the peer identity. Returns an empty iterator (first _next will return
    NULL) if the peer is not authenticated. */
 GRPCAPI grpc_auth_property_iterator
 grpc_auth_context_peer_identity(const grpc_auth_context *ctx);
 
-/* Finds a property in the context. May return an empty iterator (first _next
+/** Finds a property in the context. May return an empty iterator (first _next
    will return NULL) if no property with this name was found in the context. */
 GRPCAPI grpc_auth_property_iterator grpc_auth_context_find_properties_by_name(
     const grpc_auth_context *ctx, const char *name);
 
-/* Gets the name of the property that indicates the peer identity. Will return
+/** Gets the name of the property that indicates the peer identity. Will return
    NULL if the peer is not authenticated. */
 GRPCAPI const char *grpc_auth_context_peer_identity_property_name(
     const grpc_auth_context *ctx);
 
-/* Returns 1 if the peer is authenticated, 0 otherwise. */
+/** Returns 1 if the peer is authenticated, 0 otherwise. */
 GRPCAPI int grpc_auth_context_peer_is_authenticated(
     const grpc_auth_context *ctx);
 
-/* Gets the auth context from the call. Caller needs to call
+/** Gets the auth context from the call. Caller needs to call
    grpc_auth_context_release on the returned context. */
 GRPCAPI grpc_auth_context *grpc_call_auth_context(grpc_call *call);
 
-/* Releases the auth context returned from grpc_call_auth_context. */
+/** Releases the auth context returned from grpc_call_auth_context. */
 GRPCAPI void grpc_auth_context_release(grpc_auth_context *context);
 
-/* --
+/** --
    The following auth context methods should only be called by a server metadata
    processor to set properties extracted from auth metadata.
    -- */
 
-/* Add a property. */
+/** Add a property. */
 GRPCAPI void grpc_auth_context_add_property(grpc_auth_context *ctx,
                                             const char *name, const char *value,
                                             size_t value_length);
 
-/* Add a C string property. */
+/** Add a C string property. */
 GRPCAPI void grpc_auth_context_add_cstring_property(grpc_auth_context *ctx,
                                                     const char *name,
                                                     const char *value);
 
-/* Sets the property name. Returns 1 if successful or 0 in case of failure
+/** Sets the property name. Returns 1 if successful or 0 in case of failure
    (which means that no property with this name exists). */
 GRPCAPI int grpc_auth_context_set_peer_identity_property_name(
     grpc_auth_context *ctx, const char *name);
 
-/* --- grpc_channel_credentials object. ---
+/** --- grpc_channel_credentials object. ---
 
    A channel credentials object represents a way to authenticate a client on a
    channel.  */
 
 typedef struct grpc_channel_credentials grpc_channel_credentials;
 
-/* Releases a channel credentials object.
+/** Releases a channel credentials object.
    The creator of the credentials object is responsible for its release. */
 GRPCAPI void grpc_channel_credentials_release(grpc_channel_credentials *creds);
 
-/* Creates default credentials to connect to a google gRPC service.
+/** Creates default credentials to connect to a google gRPC service.
    WARNING: Do NOT use this credentials to connect to a non-google service as
    this could result in an oauth2 token leak. */
 GRPCAPI grpc_channel_credentials *grpc_google_default_credentials_create(void);
 
-/* Callback for getting the SSL roots override from the application.
+/** Callback for getting the SSL roots override from the application.
    In case of success, *pem_roots_certs must be set to a NULL terminated string
    containing the list of PEM encoded root certificates. The ownership is passed
    to the core and freed (laster by the core) with gpr_free.
@@ -138,7 +138,7 @@
 typedef grpc_ssl_roots_override_result (*grpc_ssl_roots_override_callback)(
     char **pem_root_certs);
 
-/* Setup a callback to override the default TLS/SSL roots.
+/** Setup a callback to override the default TLS/SSL roots.
    This function is not thread-safe and must be called at initialization time
    before any ssl credentials are created to have the desired side effect.
    If GRPC_DEFAULT_SSL_ROOTS_FILE_PATH environment is set to a valid path, the
@@ -146,18 +146,18 @@
 GRPCAPI void grpc_set_ssl_roots_override_callback(
     grpc_ssl_roots_override_callback cb);
 
-/* Object that holds a private key / certificate chain pair in PEM format. */
+/** Object that holds a private key / certificate chain pair in PEM format. */
 typedef struct {
-  /* private_key is the NULL-terminated string containing the PEM encoding of
+  /** private_key is the NULL-terminated string containing the PEM encoding of
      the client's private key. */
   const char *private_key;
 
-  /* cert_chain is the NULL-terminated string containing the PEM encoding of
+  /** cert_chain is the NULL-terminated string containing the PEM encoding of
      the client's certificate chain. */
   const char *cert_chain;
 } grpc_ssl_pem_key_cert_pair;
 
-/* Creates an SSL credentials object.
+/** Creates an SSL credentials object.
    - pem_root_certs is the NULL-terminated string containing the PEM encoding
      of the server root certificates. If this parameter is NULL, the
      implementation will first try to dereference the file pointed by the
@@ -172,7 +172,7 @@
     const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pair,
     void *reserved);
 
-/* --- grpc_call_credentials object.
+/** --- grpc_call_credentials object.
 
    A call credentials object represents a way to authenticate on a particular
    call. These credentials can be composed with a channel credentials object
@@ -180,21 +180,21 @@
 
 typedef struct grpc_call_credentials grpc_call_credentials;
 
-/* Releases a call credentials object.
+/** Releases a call credentials object.
    The creator of the credentials object is responsible for its release. */
 GRPCAPI void grpc_call_credentials_release(grpc_call_credentials *creds);
 
-/* Creates a composite channel credentials object. */
+/** Creates a composite channel credentials object. */
 GRPCAPI grpc_channel_credentials *grpc_composite_channel_credentials_create(
     grpc_channel_credentials *channel_creds, grpc_call_credentials *call_creds,
     void *reserved);
 
-/* Creates a composite call credentials object. */
+/** Creates a composite call credentials object. */
 GRPCAPI grpc_call_credentials *grpc_composite_call_credentials_create(
     grpc_call_credentials *creds1, grpc_call_credentials *creds2,
     void *reserved);
 
-/* Creates a compute engine credentials object for connecting to Google.
+/** Creates a compute engine credentials object for connecting to Google.
    WARNING: Do NOT use this credentials to connect to a non-google service as
    this could result in an oauth2 token leak. */
 GRPCAPI grpc_call_credentials *grpc_google_compute_engine_credentials_create(
@@ -202,7 +202,7 @@
 
 GRPCAPI gpr_timespec grpc_max_auth_token_lifetime();
 
-/* Creates a JWT credentials object. May return NULL if the input is invalid.
+/** Creates a JWT credentials object. May return NULL if the input is invalid.
    - json_key is the JSON key string containing the client's private key.
    - token_lifetime is the lifetime of each Json Web Token (JWT) created with
      this credentials.  It should not exceed grpc_max_auth_token_lifetime or
@@ -212,7 +212,7 @@
                                                    gpr_timespec token_lifetime,
                                                    void *reserved);
 
-/* Creates an Oauth2 Refresh Token credentials object for connecting to Google.
+/** Creates an Oauth2 Refresh Token credentials object for connecting to Google.
    May return NULL if the input is invalid.
    WARNING: Do NOT use this credentials to connect to a non-google service as
    this could result in an oauth2 token leak.
@@ -221,17 +221,17 @@
 GRPCAPI grpc_call_credentials *grpc_google_refresh_token_credentials_create(
     const char *json_refresh_token, void *reserved);
 
-/* Creates an Oauth2 Access Token credentials with an access token that was
+/** Creates an Oauth2 Access Token credentials with an access token that was
    aquired by an out of band mechanism. */
 GRPCAPI grpc_call_credentials *grpc_access_token_credentials_create(
     const char *access_token, void *reserved);
 
-/* Creates an IAM credentials object for connecting to Google. */
+/** Creates an IAM credentials object for connecting to Google. */
 GRPCAPI grpc_call_credentials *grpc_google_iam_credentials_create(
     const char *authorization_token, const char *authority_selector,
     void *reserved);
 
-/* Callback function to be called by the metadata credentials plugin
+/** Callback function to be called by the metadata credentials plugin
    implementation when the metadata is ready.
    - user_data is the opaque pointer that was passed in the get_metadata method
      of the grpc_metadata_credentials_plugin (see below).
@@ -246,31 +246,31 @@
     void *user_data, const grpc_metadata *creds_md, size_t num_creds_md,
     grpc_status_code status, const char *error_details);
 
-/* Context that can be used by metadata credentials plugin in order to create
+/** Context that can be used by metadata credentials plugin in order to create
    auth related metadata. */
 typedef struct {
-  /* The fully qualifed service url. */
+  /** The fully qualifed service url. */
   const char *service_url;
 
-  /* The method name of the RPC being called (not fully qualified).
+  /** The method name of the RPC being called (not fully qualified).
      The fully qualified method name can be built from the service_url:
      full_qualified_method_name = ctx->service_url + '/' + ctx->method_name. */
   const char *method_name;
 
-  /* The auth_context of the channel which gives the server's identity. */
+  /** The auth_context of the channel which gives the server's identity. */
   const grpc_auth_context *channel_auth_context;
 
-  /* Reserved for future use. */
+  /** Reserved for future use. */
   void *reserved;
 } grpc_auth_metadata_context;
 
-/* grpc_metadata_credentials plugin is an API user provided structure used to
+/** grpc_metadata_credentials plugin is an API user provided structure used to
    create grpc_credentials objects that can be set on a channel (composed) or
    a call. See grpc_credentials_metadata_create_from_plugin below.
    The grpc client stack will call the get_metadata method of the plugin for
    every call in scope for the credentials created from it. */
 typedef struct {
-  /* The implementation of this method has to be non-blocking.
+  /** The implementation of this method has to be non-blocking.
      - context is the information that can be used by the plugin to create auth
        metadata.
      - cb is the callback that needs to be called when the metadata is ready.
@@ -278,39 +278,39 @@
   void (*get_metadata)(void *state, grpc_auth_metadata_context context,
                        grpc_credentials_plugin_metadata_cb cb, void *user_data);
 
-  /* Destroys the plugin state. */
+  /** Destroys the plugin state. */
   void (*destroy)(void *state);
 
-  /* State that will be set as the first parameter of the methods above. */
+  /** State that will be set as the first parameter of the methods above. */
   void *state;
 
-  /* Type of credentials that this plugin is implementing. */
+  /** Type of credentials that this plugin is implementing. */
   const char *type;
 } grpc_metadata_credentials_plugin;
 
-/* Creates a credentials object from a plugin. */
+/** Creates a credentials object from a plugin. */
 GRPCAPI grpc_call_credentials *grpc_metadata_credentials_create_from_plugin(
     grpc_metadata_credentials_plugin plugin, void *reserved);
 
-/* --- Secure channel creation. --- */
+/** --- Secure channel creation. --- */
 
-/* Creates a secure channel using the passed-in credentials. */
+/** Creates a secure channel using the passed-in credentials. */
 GRPCAPI grpc_channel *grpc_secure_channel_create(
     grpc_channel_credentials *creds, const char *target,
     const grpc_channel_args *args, void *reserved);
 
-/* --- grpc_server_credentials object. ---
+/** --- grpc_server_credentials object. ---
 
    A server credentials object represents a way to authenticate a server.  */
 
 typedef struct grpc_server_credentials grpc_server_credentials;
 
-/* Releases a server_credentials object.
+/** Releases a server_credentials object.
    The creator of the server_credentials object is responsible for its release.
    */
 GRPCAPI void grpc_server_credentials_release(grpc_server_credentials *creds);
 
-/* Deprecated in favor of grpc_ssl_server_credentials_create_ex.
+/** Deprecated in favor of grpc_ssl_server_credentials_create_ex.
    Creates an SSL server_credentials object.
    - pem_roots_cert is the NULL-terminated string containing the PEM encoding of
      the client root certificates. This parameter may be NULL if the server does
@@ -326,7 +326,7 @@
     const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs,
     size_t num_key_cert_pairs, int force_client_auth, void *reserved);
 
-/* Same as grpc_ssl_server_credentials_create method except uses
+/** Same as grpc_ssl_server_credentials_create method except uses
    grpc_ssl_client_certificate_request_type enum to support more ways to
    authenticate client cerificates.*/
 GRPCAPI grpc_server_credentials *grpc_ssl_server_credentials_create_ex(
@@ -335,25 +335,25 @@
     grpc_ssl_client_certificate_request_type client_certificate_request,
     void *reserved);
 
-/* --- Server-side secure ports. --- */
+/** --- Server-side secure ports. --- */
 
-/* Add a HTTP2 over an encrypted link over tcp listener.
+/** Add a HTTP2 over an encrypted link over tcp listener.
    Returns bound port number on success, 0 on failure.
    REQUIRES: server not started */
 GRPCAPI int grpc_server_add_secure_http2_port(grpc_server *server,
                                               const char *addr,
                                               grpc_server_credentials *creds);
 
-/* --- Call specific credentials. --- */
+/** --- Call specific credentials. --- */
 
-/* Sets a credentials to a call. Can only be called on the client side before
+/** Sets a credentials to a call. Can only be called on the client side before
    grpc_call_start_batch. */
 GRPCAPI grpc_call_error grpc_call_set_credentials(grpc_call *call,
                                                   grpc_call_credentials *creds);
 
-/* --- Auth Metadata Processing --- */
+/** --- Auth Metadata Processing --- */
 
-/* Callback function that is called when the metadata processing is done.
+/** Callback function that is called when the metadata processing is done.
    - Consumed metadata will be removed from the set of metadata available on the
      call. consumed_md may be NULL if no metadata has been consumed.
    - Response metadata will be set on the response. response_md may be NULL.
@@ -367,9 +367,9 @@
     const grpc_metadata *response_md, size_t num_response_md,
     grpc_status_code status, const char *error_details);
 
-/* Pluggable server-side metadata processor object. */
+/** Pluggable server-side metadata processor object. */
 typedef struct {
-  /* The context object is read/write: it contains the properties of the
+  /** The context object is read/write: it contains the properties of the
      channel peer and it is the job of the process function to augment it with
      properties derived from the passed-in metadata.
      The lifetime of these objects is guaranteed until cb is invoked. */
diff --git a/include/grpc/grpc_security_constants.h b/include/grpc/grpc_security_constants.h
index da05c5a..d7ac0b2 100644
--- a/include/grpc/grpc_security_constants.h
+++ b/include/grpc/grpc_security_constants.h
@@ -45,30 +45,30 @@
 #define GRPC_X509_SAN_PROPERTY_NAME "x509_subject_alternative_name"
 #define GRPC_X509_PEM_CERT_PROPERTY_NAME "x509_pem_cert"
 
-/* Environment variable that points to the default SSL roots file. This file
+/** Environment variable that points to the default SSL roots file. This file
    must be a PEM encoded file with all the roots such as the one that can be
    downloaded from https://pki.google.com/roots.pem.  */
 #define GRPC_DEFAULT_SSL_ROOTS_FILE_PATH_ENV_VAR \
   "GRPC_DEFAULT_SSL_ROOTS_FILE_PATH"
 
-/* Environment variable that points to the google default application
+/** Environment variable that points to the google default application
    credentials json key or refresh token. Used in the
    grpc_google_default_credentials_create function. */
 #define GRPC_GOOGLE_CREDENTIALS_ENV_VAR "GOOGLE_APPLICATION_CREDENTIALS"
 
-/* Results for the SSL roots override callback. */
+/** Results for the SSL roots override callback. */
 typedef enum {
   GRPC_SSL_ROOTS_OVERRIDE_OK,
-  GRPC_SSL_ROOTS_OVERRIDE_FAIL_PERMANENTLY, /* Do not try fallback options. */
+  GRPC_SSL_ROOTS_OVERRIDE_FAIL_PERMANENTLY, /** Do not try fallback options. */
   GRPC_SSL_ROOTS_OVERRIDE_FAIL
 } grpc_ssl_roots_override_result;
 
 typedef enum {
-  /* Server does not request client certificate. A client can present a self
+  /** Server does not request client certificate. A client can present a self
      signed or signed certificates if it wishes to do so and they would be
      accepted. */
   GRPC_SSL_DONT_REQUEST_CLIENT_CERTIFICATE,
-  /* Server requests client certificate but does not enforce that the client
+  /** Server requests client certificate but does not enforce that the client
      presents a certificate.
 
      If the client presents a certificate, the client authentication is left to
@@ -77,7 +77,7 @@
      The key cert pair should still be valid for the SSL connection to be
      established. */
   GRPC_SSL_REQUEST_CLIENT_CERTIFICATE_BUT_DONT_VERIFY,
-  /* Server requests client certificate but does not enforce that the client
+  /** Server requests client certificate but does not enforce that the client
      presents a certificate.
 
      If the client presents a certificate, the client authentication is done by
@@ -87,7 +87,7 @@
      The key cert pair should still be valid for the SSL connection to be
      established. */
   GRPC_SSL_REQUEST_CLIENT_CERTIFICATE_AND_VERIFY,
-  /* Server requests client certificate but enforces that the client presents a
+  /** Server requests client certificate but enforces that the client presents a
      certificate.
 
      If the client presents a certificate, the client authentication is left to
@@ -96,7 +96,7 @@
      The key cert pair should still be valid for the SSL connection to be
      established. */
   GRPC_SSL_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_BUT_DONT_VERIFY,
-  /* Server requests client certificate but enforces that the client presents a
+  /** Server requests client certificate but enforces that the client presents a
      certificate.
 
      The cerificate presented by the client is verified by grpc framework (The
diff --git a/include/grpc/impl/codegen/atm.h b/include/grpc/impl/codegen/atm.h
index 4bd572d..d348f32 100644
--- a/include/grpc/impl/codegen/atm.h
+++ b/include/grpc/impl/codegen/atm.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_IMPL_CODEGEN_ATM_H
 #define GRPC_IMPL_CODEGEN_ATM_H
 
-/* This interface provides atomic operations and barriers.
+/** This interface provides atomic operations and barriers.
    It is internal to gpr support code and should not be used outside it.
 
    If an operation with acquire semantics precedes another memory access by the
diff --git a/include/grpc/impl/codegen/atm_windows.h b/include/grpc/impl/codegen/atm_windows.h
index a533651..fa842a3 100644
--- a/include/grpc/impl/codegen/atm_windows.h
+++ b/include/grpc/impl/codegen/atm_windows.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_IMPL_CODEGEN_ATM_WINDOWS_H
 #define GRPC_IMPL_CODEGEN_ATM_WINDOWS_H
 
-/* Win32 variant of atm_platform.h */
+/** Win32 variant of atm_platform.h */
 #include <grpc/impl/codegen/port_platform.h>
 
 typedef intptr_t gpr_atm;
@@ -64,7 +64,7 @@
 }
 
 static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
-/* InterlockedCompareExchangePointerNoFence() not available on vista or
+/** InterlockedCompareExchangePointerNoFence() not available on vista or
    windows7 */
 #ifdef GPR_ARCH_64
   return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
@@ -107,7 +107,7 @@
 
 static __inline gpr_atm gpr_atm_no_barrier_fetch_add(gpr_atm *p,
                                                      gpr_atm delta) {
-  /* Use the CAS operation to get pointer-sized fetch and add */
+  /** Use the CAS operation to get pointer-sized fetch and add */
   gpr_atm old;
   do {
     old = *p;
@@ -116,7 +116,7 @@
 }
 
 static __inline gpr_atm gpr_atm_full_fetch_add(gpr_atm *p, gpr_atm delta) {
-  /* Use a CAS operation to get pointer-sized fetch and add */
+  /** Use a CAS operation to get pointer-sized fetch and add */
   gpr_atm old;
 #ifdef GPR_ARCH_64
   do {
diff --git a/include/grpc/impl/codegen/byte_buffer_reader.h b/include/grpc/impl/codegen/byte_buffer_reader.h
index 85a4864..354a28a 100644
--- a/include/grpc/impl/codegen/byte_buffer_reader.h
+++ b/include/grpc/impl/codegen/byte_buffer_reader.h
@@ -43,9 +43,9 @@
 struct grpc_byte_buffer_reader {
   struct grpc_byte_buffer *buffer_in;
   struct grpc_byte_buffer *buffer_out;
-  /* Different current objects correspond to different types of byte buffers */
+  /** Different current objects correspond to different types of byte buffers */
   union {
-    /* Index into a slice buffer's array of slices */
+    /** Index into a slice buffer's array of slices */
     unsigned index;
   } current;
 };
diff --git a/include/grpc/impl/codegen/compression_types.h b/include/grpc/impl/codegen/compression_types.h
index a563711..953b51d 100644
--- a/include/grpc/impl/codegen/compression_types.h
+++ b/include/grpc/impl/codegen/compression_types.h
@@ -67,7 +67,7 @@
   "grpc.compression_enabled_algorithms_bitset"
 /** \} */
 
-/* The various compression algorithms supported by gRPC */
+/** The various compression algorithms supported by gRPC */
 typedef enum {
   GRPC_COMPRESS_NONE = 0,
   GRPC_COMPRESS_DEFLATE,
diff --git a/include/grpc/impl/codegen/gpr_slice.h b/include/grpc/impl/codegen/gpr_slice.h
index c62e976..ead0b7d 100644
--- a/include/grpc/impl/codegen/gpr_slice.h
+++ b/include/grpc/impl/codegen/gpr_slice.h
@@ -33,11 +33,11 @@
 #ifndef GRPC_IMPL_CODEGEN_GPR_SLICE_H
 #define GRPC_IMPL_CODEGEN_GPR_SLICE_H
 
-/* WARNING: Please do not use this header. This was added as a temporary measure
- * to not break some of the external projects that depend on gpr_slice_*
- * functions. We are actively working on moving all the gpr_slice_* references
- * to grpc_slice_* and this file will be removed
- * */
+/** WARNING: Please do not use this header. This was added as a temporary
+ * measure to not break some of the external projects that depend on
+ * gpr_slice_* functions. We are actively working on moving all the
+ * gpr_slice_* references to grpc_slice_* and this file will be removed
+ */
 
 /* TODO (sreek) - Allowed by default but will be very soon turned off */
 #define GRPC_ALLOW_GPR_SLICE_FUNCTIONS 1
diff --git a/include/grpc/impl/codegen/gpr_types.h b/include/grpc/impl/codegen/gpr_types.h
index 34d8156..ee44252 100644
--- a/include/grpc/impl/codegen/gpr_types.h
+++ b/include/grpc/impl/codegen/gpr_types.h
@@ -42,22 +42,22 @@
 extern "C" {
 #endif
 
-/* The clocks we support. */
+/** The clocks we support. */
 typedef enum {
-  /* Monotonic clock. Epoch undefined. Always moves forwards. */
+  /** Monotonic clock. Epoch undefined. Always moves forwards. */
   GPR_CLOCK_MONOTONIC = 0,
-  /* Realtime clock. May jump forwards or backwards. Settable by
+  /** Realtime clock. May jump forwards or backwards. Settable by
      the system administrator. Has its epoch at 0:00:00 UTC 1 Jan 1970. */
   GPR_CLOCK_REALTIME,
-  /* CPU cycle time obtained by rdtsc instruction on x86 platforms. Epoch
+  /** CPU cycle time obtained by rdtsc instruction on x86 platforms. Epoch
      undefined. Degrades to GPR_CLOCK_REALTIME on other platforms. */
   GPR_CLOCK_PRECISE,
-  /* Unmeasurable clock type: no base, created by taking the difference
+  /** Unmeasurable clock type: no base, created by taking the difference
      between two times */
   GPR_TIMESPAN
 } gpr_clock_type;
 
-/* Analogous to struct timespec. On some machines, absolute times may be in
+/** Analogous to struct timespec. On some machines, absolute times may be in
  * local time. */
 typedef struct gpr_timespec {
   int64_t tv_sec;
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index 4738e02..072452c 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -50,7 +50,7 @@
 
 typedef enum {
   GRPC_BB_RAW
-  /* Future types may include GRPC_BB_PROTOBUF, etc. */
+  /** Future types may include GRPC_BB_PROTOBUF, etc. */
 } grpc_byte_buffer_type;
 
 typedef struct grpc_byte_buffer {
@@ -67,8 +67,8 @@
   } data;
 } grpc_byte_buffer;
 
-/** Completion Queues enable notification of the completion of asynchronous
-    actions. */
+/** Completion Queues enable notification of the completion of
+ * asynchronous actions. */
 typedef struct grpc_completion_queue grpc_completion_queue;
 
 /** An alarm associated with a completion queue. */
@@ -134,9 +134,9 @@
     Used to set optional channel-level configuration.
     These configuration options are modelled as key-value pairs as defined
     by grpc_arg; keys are strings to allow easy backwards-compatible extension
-    by arbitrary parties.
-    All evaluation is performed at channel creation time (i.e. the values in
-    this structure need only live through the creation invocation).
+    by arbitrary parties. All evaluation is performed at channel creation
+    time (i.e. the values in this structure need only live through the
+    creation invocation).
 
     See the description of the \ref grpc_arg_keys "available args" for more
     details. */
@@ -162,7 +162,8 @@
 /** Maximum message length that the channel can receive. Int valued, bytes.
     -1 means unlimited. */
 #define GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH "grpc.max_receive_message_length"
-/** \deprecated For backward compatibility. */
+/** \deprecated For backward compatibility.
+ * Use GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH instead. */
 #define GRPC_ARG_MAX_MESSAGE_LENGTH GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH
 /** Maximum message length that the channel can send. Int valued, bytes.
     -1 means unlimited. */
@@ -170,8 +171,8 @@
 /** Maximum time that a channel may have no outstanding rpcs. Int valued,
     milliseconds. INT_MAX means unlimited. */
 #define GRPC_ARG_MAX_CONNECTION_IDLE_MS "grpc.max_connection_idle_ms"
-/** Maximum time that a channel may exist. Int valued, milliseconds. INT_MAX
-   means unlimited. */
+/** Maximum time that a channel may exist. Int valued, milliseconds.
+ * INT_MAX means unlimited. */
 #define GRPC_ARG_MAX_CONNECTION_AGE_MS "grpc.max_connection_age_ms"
 /** Grace period after the chennel reaches its max age. Int valued,
    milliseconds. INT_MAX means unlimited. */
@@ -182,7 +183,7 @@
 /** Enable/disable support for deadline checking. Defaults to 1, unless
     GRPC_ARG_MINIMAL_STACK is enabled, in which case it defaults to 0 */
 #define GRPC_ARG_ENABLE_DEADLINE_CHECKS "grpc.enable_deadline_checking"
-/** Initial sequence number for http2 transports. Int valued. */
+/** Initial stream ID for http2 transports. Int valued. */
 #define GRPC_ARG_HTTP2_INITIAL_SEQUENCE_NUMBER \
   "grpc.http2.initial_sequence_number"
 /** Amount to read ahead on individual streams. Defaults to 64kb, larger
@@ -197,27 +198,24 @@
 #define GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_ENCODER \
   "grpc.http2.hpack_table_size.encoder"
 /** How big a frame are we willing to receive via HTTP2.
-    Min 16384, max 16777215.
-    Larger values give lower CPU usage for large messages, but more head of line
-    blocking for small messages. */
+    Min 16384, max 16777215. Larger values give lower CPU usage for large
+    messages, but more head of line blocking for small messages. */
 #define GRPC_ARG_HTTP2_MAX_FRAME_SIZE "grpc.http2.max_frame_size"
 /** Should BDP probing be performed? */
 #define GRPC_ARG_HTTP2_BDP_PROBE "grpc.http2.bdp_probe"
 /** Minimum time (in milliseconds) between successive ping frames being sent */
 #define GRPC_ARG_HTTP2_MIN_TIME_BETWEEN_PINGS_MS \
   "grpc.http2.min_time_between_pings_ms"
-/* Channel arg to override the http2 :scheme header */
+/** Channel arg to override the http2 :scheme header */
 #define GRPC_ARG_HTTP2_SCHEME "grpc.http2_scheme"
 /** How many pings can we send before needing to send a data frame or header
-    frame?
-    (0 indicates that an infinite number of pings can be sent without sending
-     a data frame or header frame) */
+    frame? (0 indicates that an infinite number of pings can be sent without
+    sending a data frame or header frame) */
 #define GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA \
   "grpc.http2.max_pings_without_data"
 /** How many misbehaving pings the server can bear before sending goaway and
-    closing the transport?
-    (0 indicates that the server can bear an infinite number of misbehaving
-     pings) */
+    closing the transport? (0 indicates that the server can bear an infinite
+    number of misbehaving pings) */
 #define GRPC_ARG_HTTP2_MAX_PING_STRIKES "grpc.http2.max_ping_strikes"
 /** Minimum allowed time between two pings without sending any data frame. Int
     valued, seconds */
@@ -256,20 +254,22 @@
 /** The time between the first and second connection attempts, in ms */
 #define GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS \
   "grpc.initial_reconnect_backoff_ms"
-/* 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
-   type \a GRPC_ARG_STRING. This *should* be used for testing only.
-   If this argument is not specified, the name used for SSL host name checking
-   will be the target parameter (assuming that the secure channel is an SSL
-   channel). If this parameter is specified and the underlying is not an SSL
-   channel, it will just be ignored. */
+/** 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
+    type \a GRPC_ARG_STRING. If this argument is not specified, the name used
+    for SSL host name checking will be the target parameter (assuming that the
+    secure channel is an SSL channel). If this parameter is specified and the
+    underlying is not an SSL channel, it will just be ignored. */
 #define GRPC_SSL_TARGET_NAME_OVERRIDE_ARG "grpc.ssl_target_name_override"
-/* Maximum metadata size, in bytes. */
+/** Maximum metadata size, in bytes. Note this limit applies to the max sum of
+    all metadata key-value entries in a batch of headers. */
 #define GRPC_ARG_MAX_METADATA_SIZE "grpc.max_metadata_size"
 /** If non-zero, allow the use of SO_REUSEPORT if it's available (default 1) */
 #define GRPC_ARG_ALLOW_REUSEPORT "grpc.so_reuseport"
-/** If non-zero, a pointer to a buffer pool (use grpc_resource_quota_arg_vtable
-   to fetch an appropriate pointer arg vtable) */
+/** If non-zero, a pointer to a buffer pool (a pointer of type
+ * grpc_resource_quota*). (use grpc_resource_quota_arg_vtable() to fetch an
+ * appropriate pointer arg vtable) */
 #define GRPC_ARG_RESOURCE_QUOTA "grpc.resource_quota"
 /** If non-zero, expand wildcard addresses to a list of local addresses. */
 #define GRPC_ARG_EXPAND_WILDCARD_ADDRS "grpc.expand_wildcard_addrs"
@@ -281,13 +281,16 @@
 #define GRPC_ARG_SOCKET_MUTATOR "grpc.socket_mutator"
 /** The grpc_socket_factory instance to create and bind sockets. A pointer. */
 #define GRPC_ARG_SOCKET_FACTORY "grpc.socket_factory"
-/** If non-zero, Cronet transport will coalesce packets to fewer frames when
- * possible. */
+/** If non-zero, Cronet transport will coalesce packets to fewer frames
+ * when possible. */
 #define GRPC_ARG_USE_CRONET_PACKET_COALESCING \
   "grpc.use_cronet_packet_coalescing"
-/* Channel arg (integer) setting how large a slice to try and read from the wire
-each time recvmsg (or equivalent) is called */
+/** Channel arg (integer) setting how large a slice to try and read from the
+   wire each time recvmsg (or equivalent) is called **/
 #define GRPC_ARG_TCP_READ_CHUNK_SIZE "grpc.experimental.tcp_read_chunk_size"
+/** Note this is not a "channel arg" key. This is the default slice size to use
+ * when trying to read from the wire if the GRPC_ARG_TCP_READ_CHUNK_SIZE
+ * channel arg is unspecified. */
 #define GRPC_TCP_DEFAULT_READ_SLICE_SIZE 8192
 #define GRPC_ARG_TCP_MIN_READ_CHUNK_SIZE \
   "grpc.experimental.tcp_min_read_chunk_size"
@@ -296,6 +299,9 @@
 /* Timeout in milliseconds to use for calls to the grpclb load balancer.
    If 0 or unset, the balancer calls will have no deadline. */
 #define GRPC_ARG_GRPCLB_CALL_TIMEOUT_MS "grpc.grpclb_timeout_ms"
+/** If non-zero, grpc server's cronet compression workaround will be enabled */
+#define GRPC_ARG_WORKAROUND_CRONET_COMPRESSION \
+  "grpc.workaround.cronet_compression"
 /** \} */
 
 /** Result of a grpc call. If the caller satisfies the prerequisites of a
@@ -328,8 +334,8 @@
   GRPC_CALL_ERROR_INVALID_METADATA,
   /** invalid message was passed to this call */
   GRPC_CALL_ERROR_INVALID_MESSAGE,
-  /** completion queue for notification has not been registered with the
-      server */
+  /** completion queue for notification has not been registered
+   * with the server */
   GRPC_CALL_ERROR_NOT_SERVER_COMPLETION_QUEUE,
   /** this batch of operations leads to more operations than allowed */
   GRPC_CALL_ERROR_BATCH_TOO_BIG,
@@ -337,12 +343,12 @@
   GRPC_CALL_ERROR_PAYLOAD_TYPE_MISMATCH
 } grpc_call_error;
 
-/* Default send/receive message size limits in bytes. -1 for unlimited. */
-/* TODO(roth) Make this match the default receive limit after next release */
+/** Default send/receive message size limits in bytes. -1 for unlimited. */
+/** TODO(roth) Make this match the default receive limit after next release */
 #define GRPC_DEFAULT_MAX_SEND_MESSAGE_LENGTH -1
 #define GRPC_DEFAULT_MAX_RECV_MESSAGE_LENGTH (4 * 1024 * 1024)
 
-/* Write Flags: */
+/** Write Flags: */
 /** Hint that the write may be buffered and need not go out on the wire
     immediately. GRPC is free to buffer the message until the next non-buffered
     write, or until writes_done, but it need not buffer completely or at all. */
@@ -353,7 +359,7 @@
 /** Mask of all valid flags. */
 #define GRPC_WRITE_USED_MASK (GRPC_WRITE_BUFFER_HINT | GRPC_WRITE_NO_COMPRESS)
 
-/* Initial metadata flags */
+/** Initial metadata flags */
 /** Signal that the call is idempotent */
 #define GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST (0x00000010u)
 /** Signal that the call should not return UNAVAILABLE before it has started */
@@ -376,8 +382,8 @@
 
 /** A single metadata element */
 typedef struct grpc_metadata {
-  /* the key, value values are expected to line up with grpc_mdelem: if changing
-     them, update metadata.h at the same time. */
+  /** the key, value values are expected to line up with grpc_mdelem: if
+     changing them, update metadata.h at the same time. */
   grpc_slice key;
   grpc_slice value;
 
@@ -444,15 +450,13 @@
   GRPC_OP_SEND_MESSAGE,
   /** Send a close from the client: one and only one instance MUST be sent from
       the client, unless the call was cancelled - in which case this can be
-      skipped.
-      This op completes after all bytes for the call (including the close)
-      have passed outgoing flow control. */
+      skipped. This op completes after all bytes for the call
+      (including the close) have passed outgoing flow control. */
   GRPC_OP_SEND_CLOSE_FROM_CLIENT,
   /** Send status from the server: one and only one instance MUST be sent from
       the server unless the call was cancelled - in which case this can be
-      skipped.
-      This op completes after all bytes for the call (including the status)
-      have passed outgoing flow control. */
+      skipped. This op completes after all bytes for the call
+      (including the status) have passed outgoing flow control. */
   GRPC_OP_SEND_STATUS_FROM_SERVER,
   /** Receive initial metadata: one and only one MUST be made on the client,
       must not be made on the server.
@@ -470,10 +474,10 @@
       This op completes after all activity on the call has completed. */
   GRPC_OP_RECV_STATUS_ON_CLIENT,
   /** Receive close on the server: one and only one must be made on the
-      server.
-      This op completes after the close has been received by the server.
-      This operation always succeeds, meaning ops paired with this operation
-      will also appear to succeed, even though they may not have. */
+      server. This op completes after the close has been received by the
+      server. This operation always succeeds, meaning ops paired with
+      this operation will also appear to succeed, even though they may not
+      have. */
   GRPC_OP_RECV_CLOSE_ON_SERVER
 } grpc_op_type;
 
@@ -510,7 +514,7 @@
       size_t trailing_metadata_count;
       grpc_metadata *trailing_metadata;
       grpc_status_code status;
-      /* optional: set to NULL if no details need sending, non-NULL if they do
+      /** optional: set to NULL if no details need sending, non-NULL if they do
        * pointer will not be retained past the start_batch call
        */
       grpc_slice *status_details;
@@ -534,8 +538,7 @@
           elements stays with the call object (ie key, value members are owned
           by the call object, trailing_metadata->array is owned by the caller).
           After the operation completes, call grpc_metadata_array_destroy on
-         this
-          value, or reuse it in a future op. */
+          this value, or reuse it in a future op. */
       grpc_metadata_array *trailing_metadata;
       grpc_status_code *status;
       grpc_slice *status_details;
@@ -550,10 +553,10 @@
 
 /** Information requested from the channel. */
 typedef struct {
-  /* If non-NULL, will be set to point to a string indicating the LB
+  /** If non-NULL, will be set to point to a string indicating the LB
    * policy name.  Caller takes ownership. */
   char **lb_policy_name;
-  /* If non-NULL, will be set to point to a string containing the
+  /** If non-NULL, will be set to point to a string containing the
    * service config used by the channel in JSON form. */
   char **service_config_json;
 } grpc_channel_info;
@@ -589,7 +592,7 @@
 /** Specifies the type of APIs to use to pop events from the completion queue */
 typedef enum {
   /** Events are popped out by calling grpc_completion_queue_next() API ONLY */
-  GRPC_CQ_NEXT = 1,
+  GRPC_CQ_NEXT,
 
   /** Events are popped out by calling grpc_completion_queue_pluck() API ONLY*/
   GRPC_CQ_PLUCK
@@ -597,9 +600,9 @@
 
 #define GRPC_CQ_CURRENT_VERSION 1
 typedef struct grpc_completion_queue_attributes {
-  /* The version number of this structure. More fields might be added to this
+  /** The version number of this structure. More fields might be added to this
      structure in future. */
-  int version; /* Set to GRPC_CQ_CURRENT_VERSION */
+  int version; /** Set to GRPC_CQ_CURRENT_VERSION */
 
   grpc_cq_completion_type cq_completion_type;
 
diff --git a/include/grpc/impl/codegen/propagation_bits.h b/include/grpc/impl/codegen/propagation_bits.h
index 4b64558..f58edb0 100644
--- a/include/grpc/impl/codegen/propagation_bits.h
+++ b/include/grpc/impl/codegen/propagation_bits.h
@@ -40,7 +40,7 @@
 extern "C" {
 #endif
 
-/* Propagation bits: this can be bitwise or-ed to form propagation_mask for
+/** Propagation bits: this can be bitwise or-ed to form propagation_mask for
  * grpc_call */
 /** Propagate deadline */
 #define GRPC_PROPAGATE_DEADLINE ((uint32_t)1)
@@ -50,7 +50,7 @@
 /** Propagate cancellation */
 #define GRPC_PROPAGATE_CANCELLATION ((uint32_t)8)
 
-/* Default propagation mask: clients of the core API are encouraged to encode
+/** Default propagation mask: clients of the core API are encouraged to encode
    deltas from this in their implementations... ie write:
    GRPC_PROPAGATE_DEFAULTS & ~GRPC_PROPAGATE_DEADLINE to disable deadline
    propagation. Doing so gives flexibility in the future to define new
diff --git a/include/grpc/impl/codegen/slice.h b/include/grpc/impl/codegen/slice.h
index b89a3f7..5c01c87 100644
--- a/include/grpc/impl/codegen/slice.h
+++ b/include/grpc/impl/codegen/slice.h
@@ -43,7 +43,7 @@
 
 typedef struct grpc_slice grpc_slice;
 
-/* Slice API
+/** Slice API
 
    A slice represents a contiguous reference counted array of bytes.
    It is cheap to take references to a slice, and it is cheap to create a
@@ -63,14 +63,14 @@
   uint32_t (*hash)(grpc_slice slice);
 } grpc_slice_refcount_vtable;
 
-/* Reference count container for grpc_slice. Contains function pointers to
+/** Reference count container for grpc_slice. Contains function pointers to
    increment and decrement reference counts. Implementations should cleanup
    when the reference count drops to zero.
    Typically client code should not touch this, and use grpc_slice_malloc,
    grpc_slice_new, or grpc_slice_new_with_len instead. */
 typedef struct grpc_slice_refcount {
   const grpc_slice_refcount_vtable *vtable;
-  /* If a subset of this slice is taken, use this pointer for the refcount.
+  /** If a subset of this slice is taken, use this pointer for the refcount.
      Typically points back to the refcount itself, however iterning
      implementations can use this to avoid a verification step on each hash
      or equality check */
@@ -79,7 +79,7 @@
 
 #define GRPC_SLICE_INLINED_SIZE (sizeof(size_t) + sizeof(uint8_t *) - 1)
 
-/* A grpc_slice s, if initialized, represents the byte range
+/** A grpc_slice s, if initialized, represents the byte range
    s.bytes[0..s.length-1].
 
    It can have an associated ref count which has a destruction routine to be run
@@ -104,23 +104,23 @@
 
 #define GRPC_SLICE_BUFFER_INLINE_ELEMENTS 8
 
-/* Represents an expandable array of slices, to be interpreted as a
+/** Represents an expandable array of slices, to be interpreted as a
    single item. */
 typedef struct {
-  /* This is for internal use only. External users (i.e any code outside grpc
+  /** This is for internal use only. External users (i.e any code outside grpc
    * core) MUST NOT use this field */
   grpc_slice *base_slices;
 
-  /* slices in the array (Points to the first valid grpc_slice in the array) */
+  /** slices in the array (Points to the first valid grpc_slice in the array) */
   grpc_slice *slices;
-  /* the number of slices in the array */
+  /** the number of slices in the array */
   size_t count;
-  /* the number of slices allocated in the array. External users (i.e any code
+  /** the number of slices allocated in the array. External users (i.e any code
    * outside grpc core) MUST NOT use this field */
   size_t capacity;
-  /* the combined length of all slices in the array */
+  /** the combined length of all slices in the array */
   size_t length;
-  /* inlined elements to avoid allocations */
+  /** inlined elements to avoid allocations */
   grpc_slice inlined[GRPC_SLICE_BUFFER_INLINE_ELEMENTS];
 } grpc_slice_buffer;
 
diff --git a/include/grpc/impl/codegen/status.h b/include/grpc/impl/codegen/status.h
index 29e4570..a2ad6b1 100644
--- a/include/grpc/impl/codegen/status.h
+++ b/include/grpc/impl/codegen/status.h
@@ -39,40 +39,40 @@
 #endif
 
 typedef enum {
-  /* Not an error; returned on success */
+  /** Not an error; returned on success */
   GRPC_STATUS_OK = 0,
 
-  /* The operation was cancelled (typically by the caller). */
+  /** The operation was cancelled (typically by the caller). */
   GRPC_STATUS_CANCELLED = 1,
 
-  /* Unknown error.  An example of where this error may be returned is
+  /** Unknown error.  An example of where this error may be returned is
      if a Status value received from another address space belongs to
      an error-space that is not known in this address space.  Also
      errors raised by APIs that do not return enough error information
      may be converted to this error. */
   GRPC_STATUS_UNKNOWN = 2,
 
-  /* Client specified an invalid argument.  Note that this differs
+  /** Client specified an invalid argument.  Note that this differs
      from FAILED_PRECONDITION.  INVALID_ARGUMENT indicates arguments
      that are problematic regardless of the state of the system
      (e.g., a malformed file name). */
   GRPC_STATUS_INVALID_ARGUMENT = 3,
 
-  /* Deadline expired before operation could complete.  For operations
+  /** Deadline expired before operation could complete.  For operations
      that change the state of the system, this error may be returned
      even if the operation has completed successfully.  For example, a
      successful response from a server could have been delayed long
      enough for the deadline to expire. */
   GRPC_STATUS_DEADLINE_EXCEEDED = 4,
 
-  /* Some requested entity (e.g., file or directory) was not found. */
+  /** Some requested entity (e.g., file or directory) was not found. */
   GRPC_STATUS_NOT_FOUND = 5,
 
-  /* Some entity that we attempted to create (e.g., file or directory)
+  /** Some entity that we attempted to create (e.g., file or directory)
      already exists. */
   GRPC_STATUS_ALREADY_EXISTS = 6,
 
-  /* The caller does not have permission to execute the specified
+  /** The caller does not have permission to execute the specified
      operation.  PERMISSION_DENIED must not be used for rejections
      caused by exhausting some resource (use RESOURCE_EXHAUSTED
      instead for those errors).  PERMISSION_DENIED must not be
@@ -80,15 +80,15 @@
      instead for those errors). */
   GRPC_STATUS_PERMISSION_DENIED = 7,
 
-  /* The request does not have valid authentication credentials for the
+  /** The request does not have valid authentication credentials for the
      operation. */
   GRPC_STATUS_UNAUTHENTICATED = 16,
 
-  /* Some resource has been exhausted, perhaps a per-user quota, or
+  /** Some resource has been exhausted, perhaps a per-user quota, or
      perhaps the entire file system is out of space. */
   GRPC_STATUS_RESOURCE_EXHAUSTED = 8,
 
-  /* Operation was rejected because the system is not in a state
+  /** Operation was rejected because the system is not in a state
      required for the operation's execution.  For example, directory
      to be deleted may be non-empty, an rmdir operation is applied to
      a non-directory, etc.
@@ -109,14 +109,14 @@
           read-modify-write on the same resource. */
   GRPC_STATUS_FAILED_PRECONDITION = 9,
 
-  /* The operation was aborted, typically due to a concurrency issue
+  /** The operation was aborted, typically due to a concurrency issue
      like sequencer check failures, transaction aborts, etc.
 
      See litmus test above for deciding between FAILED_PRECONDITION,
      ABORTED, and UNAVAILABLE. */
   GRPC_STATUS_ABORTED = 10,
 
-  /* Operation was attempted past the valid range.  E.g., seeking or
+  /** Operation was attempted past the valid range.  E.g., seeking or
      reading past end of file.
 
      Unlike INVALID_ARGUMENT, this error indicates a problem that may
@@ -133,26 +133,31 @@
      they are done. */
   GRPC_STATUS_OUT_OF_RANGE = 11,
 
-  /* Operation is not implemented or not supported/enabled in this service. */
+  /** Operation is not implemented or not supported/enabled in this service. */
   GRPC_STATUS_UNIMPLEMENTED = 12,
 
-  /* Internal errors.  Means some invariants expected by underlying
+  /** Internal errors.  Means some invariants expected by underlying
      system has been broken.  If you see one of these errors,
      something is very broken. */
   GRPC_STATUS_INTERNAL = 13,
 
-  /* The service is currently unavailable.  This is a most likely a
+  /** The service is currently unavailable.  This is a most likely a
      transient condition and may be corrected by retrying with
      a backoff.
 
+     WARNING: Although data MIGHT not have been transmitted when this
+     status occurs, there is NOT A GUARANTEE that the server has not seen
+     anything. So in general it is unsafe to retry on this status code
+     if the call is non-idempotent.
+
      See litmus test above for deciding between FAILED_PRECONDITION,
      ABORTED, and UNAVAILABLE. */
   GRPC_STATUS_UNAVAILABLE = 14,
 
-  /* Unrecoverable data loss or corruption. */
+  /** Unrecoverable data loss or corruption. */
   GRPC_STATUS_DATA_LOSS = 15,
 
-  /* Force users to include a default branch: */
+  /** Force users to include a default branch: */
   GRPC_STATUS__DO_NOT_USE = -1
 } grpc_status_code;
 
diff --git a/include/grpc/impl/codegen/sync.h b/include/grpc/impl/codegen/sync.h
index 6a8e8a6..5a135fa 100644
--- a/include/grpc/impl/codegen/sync.h
+++ b/include/grpc/impl/codegen/sync.h
@@ -33,7 +33,7 @@
 
 #ifndef GRPC_IMPL_CODEGEN_SYNC_H
 #define GRPC_IMPL_CODEGEN_SYNC_H
-/* Synchronization primitives for GPR.
+/** Synchronization primitives for GPR.
 
    The type  gpr_mu              provides a non-reentrant mutex (lock).
 
diff --git a/include/grpc/slice.h b/include/grpc/slice.h
index 9c4b158..19f546a 100644
--- a/include/grpc/slice.h
+++ b/include/grpc/slice.h
@@ -41,11 +41,11 @@
 extern "C" {
 #endif
 
-/* Increment the refcount of s. Requires slice is initialized.
+/** Increment the refcount of s. Requires slice is initialized.
    Returns s. */
 GPRAPI grpc_slice grpc_slice_ref(grpc_slice s);
 
-/* Decrement the ref count of s.  If the ref count of s reaches zero, all
+/** Decrement the ref count of s.  If the ref count of s reaches zero, all
    slices sharing the ref count are destroyed, and considered no longer
    initialized.  If s is ultimately derived from a call to grpc_slice_new(start,
    len, dest) where dest!=NULL , then (*dest)(start) is called, else if s is
@@ -53,15 +53,15 @@
    where dest!=NULL , then (*dest)(start, len).  Requires s initialized.  */
 GPRAPI void grpc_slice_unref(grpc_slice s);
 
-/* Copy slice - create a new slice that contains the same data as s */
+/** Copy slice - create a new slice that contains the same data as s */
 GPRAPI grpc_slice grpc_slice_copy(grpc_slice s);
 
-/* Create a slice pointing at some data. Calls malloc to allocate a refcount
+/** Create a slice pointing at some data. Calls malloc to allocate a refcount
    for the object, and arranges that destroy will be called with the pointer
    passed in at destruction. */
 GPRAPI grpc_slice grpc_slice_new(void *p, size_t len, void (*destroy)(void *));
 
-/* Equivalent to grpc_slice_new, but with a separate pointer that is
+/** Equivalent to grpc_slice_new, but with a separate pointer that is
    passed to the destroy function.  This function can be useful when
    the data is part of a larger structure that must be destroyed when
    the data is no longer needed. */
@@ -69,12 +69,12 @@
                                                 void (*destroy)(void *),
                                                 void *user_data);
 
-/* Equivalent to grpc_slice_new, but with a two argument destroy function that
+/** Equivalent to grpc_slice_new, but with a two argument destroy function that
    also takes the slice length. */
 GPRAPI grpc_slice grpc_slice_new_with_len(void *p, size_t len,
                                           void (*destroy)(void *, size_t));
 
-/* Equivalent to grpc_slice_new(malloc(len), len, free), but saves one malloc()
+/** Equivalent to grpc_slice_new(malloc(len), len, free), but saves one malloc()
    call.
    Aborts if malloc() fails. */
 GPRAPI grpc_slice grpc_slice_malloc(size_t length);
@@ -86,13 +86,13 @@
                       .data.inlined = {.length = (uint8_t)(len)}} \
        : grpc_slice_malloc_large((len)))
 
-/* Intern a slice:
+/** Intern a slice:
 
    The return value for two invocations of this function with  the same sequence
    of bytes is a slice which points to the same memory. */
 GPRAPI grpc_slice grpc_slice_intern(grpc_slice slice);
 
-/* Create a slice by copying a string.
+/** Create a slice by copying a string.
    Does not preserve null terminators.
    Equivalent to:
      size_t len = strlen(source);
@@ -100,29 +100,29 @@
      memcpy(slice->data, source, len); */
 GPRAPI grpc_slice grpc_slice_from_copied_string(const char *source);
 
-/* Create a slice by copying a buffer.
+/** Create a slice by copying a buffer.
    Equivalent to:
      grpc_slice slice = grpc_slice_malloc(len);
      memcpy(slice->data, source, len); */
 GPRAPI grpc_slice grpc_slice_from_copied_buffer(const char *source, size_t len);
 
-/* Create a slice pointing to constant memory */
+/** Create a slice pointing to constant memory */
 GPRAPI grpc_slice grpc_slice_from_static_string(const char *source);
 
-/* Create a slice pointing to constant memory */
+/** Create a slice pointing to constant memory */
 GPRAPI grpc_slice grpc_slice_from_static_buffer(const void *source, size_t len);
 
-/* Return a result slice derived from s, which shares a ref count with \a s,
+/** Return a result slice derived from s, which shares a ref count with \a s,
    where result.data==s.data+begin, and result.length==end-begin. The ref count
    of \a s is increased by one. Do not assign result back to \a s.
    Requires s initialized, begin <= end, begin <= s.length, and
    end <= source->length. */
 GPRAPI grpc_slice grpc_slice_sub(grpc_slice s, size_t begin, size_t end);
 
-/* The same as grpc_slice_sub, but without altering the ref count */
+/** The same as grpc_slice_sub, but without altering the ref count */
 GPRAPI grpc_slice grpc_slice_sub_no_ref(grpc_slice s, size_t begin, size_t end);
 
-/* Splits s into two: modifies s to be s[0:split], and returns a new slice,
+/** Splits s into two: modifies s to be s[0:split], and returns a new slice,
    sharing a refcount with s, that contains s[split:s.length].
    Requires s intialized, split <= s.length */
 GPRAPI grpc_slice grpc_slice_split_tail(grpc_slice *s, size_t split);
@@ -133,13 +133,13 @@
   GRPC_SLICE_REF_BOTH = 1 + 2
 } grpc_slice_ref_whom;
 
-/* The same as grpc_slice_split_tail, but with an option to skip altering
+/** The same as grpc_slice_split_tail, but with an option to skip altering
  * refcounts (grpc_slice_split_tail_maybe_ref(..., true) is equivalent to
  * grpc_slice_split_tail(...)) */
 GPRAPI grpc_slice grpc_slice_split_tail_maybe_ref(grpc_slice *s, size_t split,
                                                   grpc_slice_ref_whom ref_whom);
 
-/* Splits s into two: modifies s to be s[split:s.length], and returns a new
+/** Splits s into two: modifies s to be s[split:s.length], and returns a new
    slice, sharing a refcount with s, that contains s[0:split].
    Requires s intialized, split <= s.length */
 GPRAPI grpc_slice grpc_slice_split_head(grpc_slice *s, size_t split);
@@ -151,35 +151,35 @@
 
 GPRAPI int grpc_slice_eq(grpc_slice a, grpc_slice b);
 
-/* Returns <0 if a < b, ==0 if a == b, >0 if a > b
+/** Returns <0 if a < b, ==0 if a == b, >0 if a > b
    The order is arbitrary, and is not guaranteed to be stable across different
    versions of the API. */
 GPRAPI int grpc_slice_cmp(grpc_slice a, grpc_slice b);
 GPRAPI int grpc_slice_str_cmp(grpc_slice a, const char *b);
 GPRAPI int grpc_slice_buf_cmp(grpc_slice a, const void *b, size_t blen);
 
-/* return non-zero if the first blen bytes of a are equal to b */
+/** return non-zero if the first blen bytes of a are equal to b */
 GPRAPI int grpc_slice_buf_start_eq(grpc_slice a, const void *b, size_t blen);
 
-/* return the index of the last instance of \a c in \a s, or -1 if not found */
+/** return the index of the last instance of \a c in \a s, or -1 if not found */
 GPRAPI int grpc_slice_rchr(grpc_slice s, char c);
 GPRAPI int grpc_slice_chr(grpc_slice s, char c);
 
-/* return the index of the first occurance of \a needle in \a haystack, or -1 if
- * it's not found */
+/** return the index of the first occurance of \a needle in \a haystack, or -1
+   if it's not found */
 GPRAPI int grpc_slice_slice(grpc_slice haystack, grpc_slice needle);
 
 GPRAPI uint32_t grpc_slice_hash(grpc_slice s);
 
-/* Do two slices point at the same memory, with the same length
+/** Do two slices point at the same memory, with the same length
    If a or b is inlined, actually compares data */
 GPRAPI int grpc_slice_is_equivalent(grpc_slice a, grpc_slice b);
 
-/* Return a slice pointing to newly allocated memory that has the same contents
+/** Return a slice pointing to newly allocated memory that has the same contents
  * as \a s */
 GPRAPI grpc_slice grpc_slice_dup(grpc_slice a);
 
-/* Return a copy of slice as a C string. Offers no protection against embedded
+/** Return a copy of slice as a C string. Offers no protection against embedded
    NULL's. Returned string must be freed with gpr_free. */
 GPRAPI char *grpc_slice_to_c_string(grpc_slice s);
 
diff --git a/include/grpc/slice_buffer.h b/include/grpc/slice_buffer.h
index cdbd747..0d59395 100644
--- a/include/grpc/slice_buffer.h
+++ b/include/grpc/slice_buffer.h
@@ -40,15 +40,15 @@
 extern "C" {
 #endif
 
-/* initialize a slice buffer */
+/** initialize a slice buffer */
 GPRAPI void grpc_slice_buffer_init(grpc_slice_buffer *sb);
-/* destroy a slice buffer - unrefs any held elements */
+/** destroy a slice buffer - unrefs any held elements */
 GPRAPI void grpc_slice_buffer_destroy(grpc_slice_buffer *sb);
-/* Add an element to a slice buffer - takes ownership of the slice.
+/** Add an element to a slice buffer - takes ownership of the slice.
    This function is allowed to concatenate the passed in slice to the end of
    some other slice if desired by the slice buffer. */
 GPRAPI void grpc_slice_buffer_add(grpc_slice_buffer *sb, grpc_slice slice);
-/* add an element to a slice buffer - takes ownership of the slice and returns
+/** add an element to a slice buffer - takes ownership of the slice and returns
    the index of the slice.
    Guarantees that the slice will not be concatenated at the end of another
    slice (i.e. the data for this slice will begin at the first byte of the
@@ -59,35 +59,35 @@
                                             grpc_slice slice);
 GPRAPI void grpc_slice_buffer_addn(grpc_slice_buffer *sb, grpc_slice *slices,
                                    size_t n);
-/* add a very small (less than 8 bytes) amount of data to the end of a slice
+/** add a very small (less than 8 bytes) amount of data to the end of a slice
    buffer: returns a pointer into which to add the data */
 GPRAPI uint8_t *grpc_slice_buffer_tiny_add(grpc_slice_buffer *sb, size_t len);
-/* pop the last buffer, but don't unref it */
+/** pop the last buffer, but don't unref it */
 GPRAPI void grpc_slice_buffer_pop(grpc_slice_buffer *sb);
-/* clear a slice buffer, unref all elements */
+/** clear a slice buffer, unref all elements */
 GPRAPI void grpc_slice_buffer_reset_and_unref(grpc_slice_buffer *sb);
-/* swap the contents of two slice buffers */
+/** swap the contents of two slice buffers */
 GPRAPI void grpc_slice_buffer_swap(grpc_slice_buffer *a, grpc_slice_buffer *b);
-/* move all of the elements of src into dst */
+/** move all of the elements of src into dst */
 GPRAPI void grpc_slice_buffer_move_into(grpc_slice_buffer *src,
                                         grpc_slice_buffer *dst);
-/* remove n bytes from the end of a slice buffer */
+/** remove n bytes from the end of a slice buffer */
 GPRAPI void grpc_slice_buffer_trim_end(grpc_slice_buffer *src, size_t n,
                                        grpc_slice_buffer *garbage);
-/* move the first n bytes of src into dst */
+/** move the first n bytes of src into dst */
 GPRAPI void grpc_slice_buffer_move_first(grpc_slice_buffer *src, size_t n,
                                          grpc_slice_buffer *dst);
-/* move the first n bytes of src into dst without adding references */
+/** move the first n bytes of src into dst without adding references */
 GPRAPI void grpc_slice_buffer_move_first_no_ref(grpc_slice_buffer *src,
                                                 size_t n,
                                                 grpc_slice_buffer *dst);
-/* move the first n bytes of src into dst (copying them) */
+/** 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,
                                                      size_t n, void *dst);
-/* take the first slice in the slice buffer */
+/** take the first slice in the slice buffer */
 GPRAPI grpc_slice grpc_slice_buffer_take_first(grpc_slice_buffer *src);
-/* undo the above with (a possibly different) \a slice */
+/** undo the above with (a possibly different) \a slice */
 GPRAPI void grpc_slice_buffer_undo_take_first(grpc_slice_buffer *src,
                                               grpc_slice slice);
 
diff --git a/include/grpc/support/alloc.h b/include/grpc/support/alloc.h
index 017d75a..99be2d1 100644
--- a/include/grpc/support/alloc.h
+++ b/include/grpc/support/alloc.h
@@ -44,26 +44,26 @@
 
 typedef struct gpr_allocation_functions {
   void *(*malloc_fn)(size_t size);
-  void *(*zalloc_fn)(size_t size); /* if NULL, uses malloc_fn then memset */
+  void *(*zalloc_fn)(size_t size); /** if NULL, uses malloc_fn then memset */
   void *(*realloc_fn)(void *ptr, size_t size);
   void (*free_fn)(void *ptr);
 } gpr_allocation_functions;
 
-/* malloc.
+/** malloc.
  * If size==0, always returns NULL. Otherwise this function never returns NULL.
  * The pointer returned is suitably aligned for any kind of variable it could
  * contain.
  */
 GPRAPI void *gpr_malloc(size_t size);
-/* like malloc, but zero all bytes before returning them */
+/** like malloc, but zero all bytes before returning them */
 GPRAPI void *gpr_zalloc(size_t size);
-/* free */
+/** free */
 GPRAPI void gpr_free(void *ptr);
-/* realloc, never returns NULL */
+/** realloc, never returns NULL */
 GPRAPI void *gpr_realloc(void *p, size_t size);
-/* aligned malloc, never returns NULL, will align to 1 << alignment_log */
+/** aligned malloc, never returns NULL, will align to 1 << alignment_log */
 GPRAPI void *gpr_malloc_aligned(size_t size, size_t alignment_log);
-/* free memory allocated by gpr_malloc_aligned */
+/** free memory allocated by gpr_malloc_aligned */
 GPRAPI void gpr_free_aligned(void *ptr);
 
 /** Request the family of allocation functions in \a functions be used. NOTE
diff --git a/include/grpc/support/cmdline.h b/include/grpc/support/cmdline.h
index 5b7bc82..5a83afb 100644
--- a/include/grpc/support/cmdline.h
+++ b/include/grpc/support/cmdline.h
@@ -40,7 +40,7 @@
 extern "C" {
 #endif
 
-/* Simple command line parser.
+/** Simple command line parser.
 
    Supports flags that can be specified as -foo, --foo, --no-foo, -no-foo, etc
    And integers, strings that can be specified as -foo=4, -foo blah, etc
@@ -68,32 +68,32 @@
 
 typedef struct gpr_cmdline gpr_cmdline;
 
-/* Construct a command line parser: takes a short description of the tool
+/** Construct a command line parser: takes a short description of the tool
    doing the parsing */
 GPRAPI gpr_cmdline *gpr_cmdline_create(const char *description);
-/* Add an integer parameter, with a name (used on the command line) and some
+/** Add an integer parameter, with a name (used on the command line) and some
    helpful text (used in the command usage) */
 GPRAPI void gpr_cmdline_add_int(gpr_cmdline *cl, const char *name,
                                 const char *help, int *value);
-/* The same, for a boolean flag */
+/** The same, for a boolean flag */
 GPRAPI void gpr_cmdline_add_flag(gpr_cmdline *cl, const char *name,
                                  const char *help, int *value);
-/* And for a string */
+/** And for a string */
 GPRAPI void gpr_cmdline_add_string(gpr_cmdline *cl, const char *name,
                                    const char *help, char **value);
-/* Set a callback for non-named arguments */
+/** Set a callback for non-named arguments */
 GPRAPI void gpr_cmdline_on_extra_arg(
     gpr_cmdline *cl, const char *name, const char *help,
     void (*on_extra_arg)(void *user_data, const char *arg), void *user_data);
-/* Enable surviving failure: default behavior is to exit the process */
+/** Enable surviving failure: default behavior is to exit the process */
 GPRAPI void gpr_cmdline_set_survive_failure(gpr_cmdline *cl);
-/* Parse the command line; returns 1 on success, on failure either dies
+/** Parse the command line; returns 1 on success, on failure either dies
    (by default) or returns 0 if gpr_cmdline_set_survive_failure() has been
    called */
 GPRAPI int gpr_cmdline_parse(gpr_cmdline *cl, int argc, char **argv);
-/* Destroy the parser */
+/** Destroy the parser */
 GPRAPI void gpr_cmdline_destroy(gpr_cmdline *cl);
-/* Get a string describing usage */
+/** Get a string describing usage */
 GPRAPI char *gpr_cmdline_usage_string(gpr_cmdline *cl, const char *argv0);
 
 #ifdef __cplusplus
diff --git a/include/grpc/support/cpu.h b/include/grpc/support/cpu.h
index 6734feb..0da02ad 100644
--- a/include/grpc/support/cpu.h
+++ b/include/grpc/support/cpu.h
@@ -40,13 +40,13 @@
 extern "C" {
 #endif
 
-/* Interface providing CPU information for currently running system */
+/** Interface providing CPU information for currently running system */
 
-/* Return the number of CPU cores on the current system. Will return 0 if
+/** Return the number of CPU cores on the current system. Will return 0 if
    the information is not available. */
 GPRAPI unsigned gpr_cpu_num_cores(void);
 
-/* Return the CPU on which the current thread is executing; N.B. This should
+/** Return the CPU on which the current thread is executing; N.B. This should
    be considered advisory only - it is possible that the thread is switched
    to a different CPU at any time. Returns a value in range
    [0, gpr_cpu_num_cores() - 1] */
diff --git a/include/grpc/support/histogram.h b/include/grpc/support/histogram.h
index c545038..96db758 100644
--- a/include/grpc/support/histogram.h
+++ b/include/grpc/support/histogram.h
@@ -48,7 +48,7 @@
 GPRAPI void gpr_histogram_destroy(gpr_histogram *h);
 GPRAPI void gpr_histogram_add(gpr_histogram *h, double x);
 
-/* The following merges the second histogram into the first. It only works
+/** The following merges the second histogram into the first. It only works
    if they have the same buckets and resolution. Returns 0 on failure, 1
    on success */
 GPRAPI int gpr_histogram_merge(gpr_histogram *dst, const gpr_histogram *src);
diff --git a/include/grpc/support/host_port.h b/include/grpc/support/host_port.h
index 1581954..ee786be 100644
--- a/include/grpc/support/host_port.h
+++ b/include/grpc/support/host_port.h
@@ -40,7 +40,7 @@
 extern "C" {
 #endif
 
-/* Given a host and port, creates a newly-allocated string of the form
+/** Given a host and port, creates a newly-allocated string of the form
    "host:port" or "[ho:st]:port", depending on whether the host contains colons
    like an IPv6 literal.  If the host is already bracketed, then additional
    brackets will not be added.
@@ -52,7 +52,7 @@
    In the unlikely event of an error, returns -1 and sets *out to NULL. */
 GPRAPI int gpr_join_host_port(char **out, const char *host, int port);
 
-/* Given a name in the form "host:port" or "[ho:st]:port", split into hostname
+/** Given a name in the form "host:port" or "[ho:st]:port", split into hostname
    and port number, into newly allocated strings, which must later be
    destroyed using gpr_free().
    Return 1 on success, 0 on failure. Guarantees *host and *port == NULL on
diff --git a/include/grpc/support/log.h b/include/grpc/support/log.h
index 88346cc..917b011 100644
--- a/include/grpc/support/log.h
+++ b/include/grpc/support/log.h
@@ -44,7 +44,7 @@
 extern "C" {
 #endif
 
-/* GPR log API.
+/** GPR log API.
 
    Usage (within grpc):
 
@@ -54,7 +54,7 @@
    gpr_log(GPR_INFO, "hello world");
    gpr_log(GPR_ERROR, "%d %s!!", argument1, argument2); */
 
-/* The severity of a log message - use the #defines below when calling into
+/** The severity of a log message - use the #defines below when calling into
    gpr_log to additionally supply file and line data */
 typedef enum gpr_log_severity {
   GPR_LOG_SEVERITY_DEBUG,
@@ -64,15 +64,15 @@
 
 #define GPR_LOG_VERBOSITY_UNSET -1
 
-/* Returns a string representation of the log severity */
+/** Returns a string representation of the log severity */
 const char *gpr_log_severity_string(gpr_log_severity severity);
 
-/* Macros to build log contexts at various severity levels */
+/** Macros to build log contexts at various severity levels */
 #define GPR_DEBUG __FILE__, __LINE__, GPR_LOG_SEVERITY_DEBUG
 #define GPR_INFO __FILE__, __LINE__, GPR_LOG_SEVERITY_INFO
 #define GPR_ERROR __FILE__, __LINE__, GPR_LOG_SEVERITY_ERROR
 
-/* Log a message. It's advised to use GPR_xxx above to generate the context
+/** Log a message. It's advised to use GPR_xxx above to generate the context
  * for each message */
 GPRAPI void gpr_log(const char *file, int line, gpr_log_severity severity,
                     const char *format, ...) GPR_PRINT_FORMAT_CHECK(4, 5);
@@ -80,12 +80,12 @@
 GPRAPI void gpr_log_message(const char *file, int line,
                             gpr_log_severity severity, const char *message);
 
-/* Set global log verbosity */
+/** Set global log verbosity */
 GPRAPI void gpr_set_log_verbosity(gpr_log_severity min_severity_to_print);
 
 GPRAPI void gpr_log_verbosity_init();
 
-/* Log overrides: applications can use this API to intercept logging calls
+/** Log overrides: applications can use this API to intercept logging calls
    and use their own implementations */
 
 typedef struct {
@@ -98,7 +98,7 @@
 typedef void (*gpr_log_func)(gpr_log_func_args *args);
 GPRAPI void gpr_set_log_function(gpr_log_func func);
 
-/* abort() the process if x is zero, having written a line to the log.
+/** abort() the process if x is zero, having written a line to the log.
 
    Intended for internal invariants.  If the error can be recovered from,
    without the possibility of corruption, or might best be reflected via
diff --git a/include/grpc/support/log_windows.h b/include/grpc/support/log_windows.h
index 943a8e9..b8a4078 100644
--- a/include/grpc/support/log_windows.h
+++ b/include/grpc/support/log_windows.h
@@ -40,7 +40,7 @@
 extern "C" {
 #endif
 
-/* Returns a string allocated with gpr_malloc that contains a UTF-8
+/** Returns a string allocated with gpr_malloc that contains a UTF-8
  * formatted error message, corresponding to the error messageid.
  * Use in conjunction with GetLastError() et al.
  */
diff --git a/include/grpc/support/string_util.h b/include/grpc/support/string_util.h
index 5ab983d..8b268a6 100644
--- a/include/grpc/support/string_util.h
+++ b/include/grpc/support/string_util.h
@@ -40,13 +40,13 @@
 extern "C" {
 #endif
 
-/* String utility functions */
+/** String utility functions */
 
-/* Returns a copy of src that can be passed to gpr_free().
+/** Returns a copy of src that can be passed to gpr_free().
    If allocation fails or if src is NULL, returns NULL. */
 GPRAPI char *gpr_strdup(const char *src);
 
-/* printf to a newly-allocated string.  The set of supported formats may vary
+/** printf to a newly-allocated string.  The set of supported formats may vary
    between platforms.
 
    On success, returns the number of bytes printed (excluding the final '\0'),
diff --git a/include/grpc/support/subprocess.h b/include/grpc/support/subprocess.h
index 2baa43e..dfb8098 100644
--- a/include/grpc/support/subprocess.h
+++ b/include/grpc/support/subprocess.h
@@ -42,13 +42,13 @@
 
 typedef struct gpr_subprocess gpr_subprocess;
 
-/* .exe on windows, empty on unices */
+/** .exe on windows, empty on unices */
 GPRAPI const char *gpr_subprocess_binary_extension();
 
 GPRAPI gpr_subprocess *gpr_subprocess_create(int argc, const char **argv);
-/* if subprocess has not been joined, kill it */
+/** if subprocess has not been joined, kill it */
 GPRAPI void gpr_subprocess_destroy(gpr_subprocess *p);
-/* returns exit status; can be called at most once */
+/** returns exit status; can be called at most once */
 GPRAPI int gpr_subprocess_join(gpr_subprocess *p);
 GPRAPI void gpr_subprocess_interrupt(gpr_subprocess *p);
 
diff --git a/include/grpc/support/sync.h b/include/grpc/support/sync.h
index 5cfeecb..7d727a0 100644
--- a/include/grpc/support/sync.h
+++ b/include/grpc/support/sync.h
@@ -41,49 +41,49 @@
 extern "C" {
 #endif
 
-/* --- Mutex interface ---
+/** --- Mutex interface ---
 
    At most one thread may hold an exclusive lock on a mutex at any given time.
    Actions taken by a thread that holds a mutex exclusively happen after
    actions taken by all previous holders of the mutex.  Variables of type
    gpr_mu are uninitialized when first declared.  */
 
-/* Initialize *mu.  Requires:  *mu uninitialized.  */
+/** Initialize *mu.  Requires:  *mu uninitialized.  */
 GPRAPI void gpr_mu_init(gpr_mu *mu);
 
-/* Cause *mu no longer to be initialized, freeing any memory in use.  Requires:
+/** Cause *mu no longer to be initialized, freeing any memory in use.  Requires:
    *mu initialized; no other concurrent operation on *mu.  */
 GPRAPI void gpr_mu_destroy(gpr_mu *mu);
 
-/* Wait until no thread has a lock on *mu, cause the calling thread to own an
+/** Wait until no thread has a lock on *mu, cause the calling thread to own an
    exclusive lock on *mu, then return.  May block indefinitely or crash if the
    calling thread has a lock on *mu.  Requires:  *mu initialized.  */
 GPRAPI void gpr_mu_lock(gpr_mu *mu);
 
-/* Release an exclusive lock on *mu held by the calling thread.  Requires:  *mu
+/** Release an exclusive lock on *mu held by the calling thread.  Requires:  *mu
    initialized; the calling thread holds an exclusive lock on *mu.  */
 GPRAPI void gpr_mu_unlock(gpr_mu *mu);
 
-/* Without blocking, attempt to acquire an exclusive lock on *mu for the
+/** Without blocking, attempt to acquire an exclusive lock on *mu for the
    calling thread, then return non-zero iff success.  Fail, if any thread holds
    the lock; succeeds with high probability if no thread holds the lock.
    Requires:  *mu initialized.  */
 GPRAPI int gpr_mu_trylock(gpr_mu *mu);
 
-/* --- Condition variable interface ---
+/** --- Condition variable interface ---
 
    A while-loop should be used with gpr_cv_wait() when waiting for conditions
    to become true.  See the example below.  Variables of type gpr_cv are
    uninitialized when first declared.  */
 
-/* Initialize *cv.  Requires:  *cv uninitialized.  */
+/** Initialize *cv.  Requires:  *cv uninitialized.  */
 GPRAPI void gpr_cv_init(gpr_cv *cv);
 
-/* Cause *cv no longer to be initialized, freeing any memory in use.  Requires:
+/** Cause *cv no longer to be initialized, freeing any memory in use.  Requires:
    *cv initialized; no other concurrent operation on *cv.*/
 GPRAPI void gpr_cv_destroy(gpr_cv *cv);
 
-/* Atomically release *mu and wait on *cv.  When the calling thread is woken
+/** Atomically release *mu and wait on *cv.  When the calling thread is woken
    from *cv or the deadline abs_deadline is exceeded, execute gpr_mu_lock(mu)
    and return whether the deadline was exceeded.  Use
    abs_deadline==gpr_inf_future for no deadline.  abs_deadline can be either
@@ -92,83 +92,83 @@
    holds an exclusive lock on *mu.  */
 GPRAPI int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
 
-/* If any threads are waiting on *cv, wake at least one.
+/** If any threads are waiting on *cv, wake at least one.
    Clients may treat this as an optimization of gpr_cv_broadcast()
    for use in the case where waking more than one waiter is not useful.
    Requires:  *cv initialized.  */
 GPRAPI void gpr_cv_signal(gpr_cv *cv);
 
-/* Wake all threads waiting on *cv.  Requires:  *cv initialized.  */
+/** Wake all threads waiting on *cv.  Requires:  *cv initialized.  */
 GPRAPI void gpr_cv_broadcast(gpr_cv *cv);
 
-/* --- One-time initialization ---
+/** --- One-time initialization ---
 
    gpr_once must be declared with static storage class, and initialized with
    GPR_ONCE_INIT.  e.g.,
      static gpr_once once_var = GPR_ONCE_INIT;     */
 
-/* Ensure that (*init_routine)() has been called exactly once (for the
+/** Ensure that (*init_routine)() has been called exactly once (for the
    specified gpr_once instance) and then return.
    If multiple threads call gpr_once() on the same gpr_once instance, one of
    them will call (*init_routine)(), and the others will block until that call
    finishes.*/
 GPRAPI void gpr_once_init(gpr_once *once, void (*init_routine)(void));
 
-/* --- One-time event notification ---
+/** --- One-time event notification ---
 
   These operations act on a gpr_event, which should be initialized with
   gpr_ev_init(), or with GPR_EVENT_INIT if static, e.g.,
        static gpr_event event_var = GPR_EVENT_INIT;
   It requires no destruction.  */
 
-/* Initialize *ev. */
+/** Initialize *ev. */
 GPRAPI void gpr_event_init(gpr_event *ev);
 
-/* Set *ev so that gpr_event_get() and gpr_event_wait() will return value.
+/** Set *ev so that gpr_event_get() and gpr_event_wait() will return value.
    Requires:  *ev initialized; value != NULL; no prior or concurrent calls to
    gpr_event_set(ev, ...) since initialization.  */
 GPRAPI void gpr_event_set(gpr_event *ev, void *value);
 
-/* Return the value set by gpr_event_set(ev, ...), or NULL if no such call has
+/** Return the value set by gpr_event_set(ev, ...), or NULL if no such call has
    completed.  If the result is non-NULL, all operations that occurred prior to
    the gpr_event_set(ev, ...) set will be visible after this call returns.
    Requires:  *ev initialized.  This operation is faster than acquiring a mutex
    on most platforms.  */
 GPRAPI void *gpr_event_get(gpr_event *ev);
 
-/* Wait until *ev is set by gpr_event_set(ev, ...), or abs_deadline is
+/** Wait until *ev is set by gpr_event_set(ev, ...), or abs_deadline is
    exceeded, then return gpr_event_get(ev).  Requires:  *ev initialized.  Use
    abs_deadline==gpr_inf_future for no deadline.  When the event has been
    signalled before the call, this operation is faster than acquiring a mutex
    on most platforms.  */
 GPRAPI void *gpr_event_wait(gpr_event *ev, gpr_timespec abs_deadline);
 
-/* --- Reference counting ---
+/** --- Reference counting ---
 
    These calls act on the type gpr_refcount.  It requires no destruction.  */
 
-/* Initialize *r to value n.  */
+/** Initialize *r to value n.  */
 GPRAPI void gpr_ref_init(gpr_refcount *r, int n);
 
-/* Increment the reference count *r.  Requires *r initialized. */
+/** Increment the reference count *r.  Requires *r initialized. */
 GPRAPI void gpr_ref(gpr_refcount *r);
 
-/* Increment the reference count *r.  Requires *r initialized.
+/** Increment the reference count *r.  Requires *r initialized.
    Crashes if refcount is zero */
 GPRAPI void gpr_ref_non_zero(gpr_refcount *r);
 
-/* Increment the reference count *r by n.  Requires *r initialized, n > 0. */
+/** Increment the reference count *r by n.  Requires *r initialized, n > 0. */
 GPRAPI void gpr_refn(gpr_refcount *r, int n);
 
-/* Decrement the reference count *r and return non-zero iff it has reached
+/** Decrement the reference count *r and return non-zero iff it has reached
    zero. .  Requires *r initialized. */
 GPRAPI int gpr_unref(gpr_refcount *r);
 
-/* Return non-zero iff the reference count of *r is one, and thus is owned
+/** Return non-zero iff the reference count of *r is one, and thus is owned
    by exactly one object. */
 GPRAPI int gpr_ref_is_unique(gpr_refcount *r);
 
-/* --- Stats counters ---
+/** --- Stats counters ---
 
    These calls act on the integral type gpr_stats_counter.  It requires no
    destruction.  Static instances may be initialized with
@@ -176,16 +176,16 @@
    Beware:  These operations do not imply memory barriers.  Do not use them to
    synchronize other events.  */
 
-/* Initialize *c to the value n. */
+/** Initialize *c to the value n. */
 GPRAPI void gpr_stats_init(gpr_stats_counter *c, intptr_t n);
 
-/* *c += inc.  Requires: *c initialized. */
+/** *c += inc.  Requires: *c initialized. */
 GPRAPI void gpr_stats_inc(gpr_stats_counter *c, intptr_t inc);
 
-/* Return *c.  Requires: *c initialized. */
+/** Return *c.  Requires: *c initialized. */
 GPRAPI intptr_t gpr_stats_read(const gpr_stats_counter *c);
 
-/* ==================Example use of interface===================
+/** ==================Example use of interface===================
    A producer-consumer queue of up to N integers,
    illustrating the use of the calls in this interface. */
 #if 0
diff --git a/include/grpc/support/thd.h b/include/grpc/support/thd.h
index 0514288..ba6cbb0 100644
--- a/include/grpc/support/thd.h
+++ b/include/grpc/support/thd.h
@@ -33,7 +33,7 @@
 
 #ifndef GRPC_SUPPORT_THD_H
 #define GRPC_SUPPORT_THD_H
-/* Thread interface for GPR.
+/** Thread interface for GPR.
 
    Types
         gpr_thd_id        a thread identifier.
@@ -50,37 +50,37 @@
 
 typedef uintptr_t gpr_thd_id;
 
-/* Thread creation options. */
+/** Thread creation options. */
 typedef struct {
-  int flags; /* Opaque field. Get and set with accessors below. */
+  int flags; /** Opaque field. Get and set with accessors below. */
 } gpr_thd_options;
 
-/* Create a new thread running (*thd_body)(arg) and place its thread identifier
+/** 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.
    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,
                        const gpr_thd_options *options);
 
-/* Return a gpr_thd_options struct with all fields set to defaults. */
+/** Return a gpr_thd_options struct with all fields set to defaults. */
 GPRAPI gpr_thd_options gpr_thd_options_default(void);
 
-/* Set the thread to become detached on startup - this is the default. */
+/** Set the thread to become detached on startup - this is the default. */
 GPRAPI void gpr_thd_options_set_detached(gpr_thd_options *options);
 
-/* Set the thread to become joinable - mutually exclusive with detached. */
+/** Set the thread to become joinable - mutually exclusive with detached. */
 GPRAPI void gpr_thd_options_set_joinable(gpr_thd_options *options);
 
-/* Returns non-zero if the option detached is set. */
+/** Returns non-zero if the option detached is set. */
 GPRAPI int gpr_thd_options_is_detached(const gpr_thd_options *options);
 
-/* Returns non-zero if the option joinable is set. */
+/** Returns non-zero if the option joinable is set. */
 GPRAPI int gpr_thd_options_is_joinable(const gpr_thd_options *options);
 
-/* Returns the identifier of the current thread. */
+/** Returns the identifier of the current thread. */
 GPRAPI gpr_thd_id gpr_thd_currentid(void);
 
-/* Blocks until the specified thread properly terminates.
+/** Blocks until the specified thread properly terminates.
    Calling this on a detached thread has unpredictable results. */
 GPRAPI void gpr_thd_join(gpr_thd_id t);
 
diff --git a/include/grpc/support/time.h b/include/grpc/support/time.h
index 66bcfca..2384f5e 100644
--- a/include/grpc/support/time.h
+++ b/include/grpc/support/time.h
@@ -43,11 +43,11 @@
 extern "C" {
 #endif
 
-/* Time constants. */
+/** Time constants. */
 GPRAPI gpr_timespec
-gpr_time_0(gpr_clock_type type); /* The zero time interval. */
-GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
-GPRAPI gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
+gpr_time_0(gpr_clock_type type); /** The zero time interval. */
+GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type); /** The far future */
+GPRAPI gpr_timespec gpr_inf_past(gpr_clock_type type);   /** The far past. */
 
 #define GPR_MS_PER_SEC 1000
 #define GPR_US_PER_SEC 1000000
@@ -56,28 +56,28 @@
 #define GPR_NS_PER_US 1000
 #define GPR_US_PER_MS 1000
 
-/* initialize time subsystem */
+/** initialize time subsystem */
 GPRAPI void gpr_time_init(void);
 
-/* Return the current time measured from the given clocks epoch. */
+/** Return the current time measured from the given clocks epoch. */
 GPRAPI gpr_timespec gpr_now(gpr_clock_type clock);
 
-/* Convert a timespec from one clock to another */
+/** Convert a timespec from one clock to another */
 GPRAPI gpr_timespec gpr_convert_clock_type(gpr_timespec t,
                                            gpr_clock_type target_clock);
 
-/* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
+/** Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
    respectively.  */
 GPRAPI int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
 
 GPRAPI gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
 GPRAPI gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
 
-/* Add and subtract times.  Calculations saturate at infinities. */
+/** Add and subtract times.  Calculations saturate at infinities. */
 GPRAPI gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
 GPRAPI gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
 
-/* Return a timespec representing a given number of time units. INT64_MIN is
+/** Return a timespec representing a given number of time units. INT64_MIN is
    interpreted as gpr_inf_past, and INT64_MAX as gpr_inf_future.  */
 GPRAPI gpr_timespec gpr_time_from_micros(int64_t x, gpr_clock_type clock_type);
 GPRAPI gpr_timespec gpr_time_from_nanos(int64_t x, gpr_clock_type clock_type);
@@ -88,12 +88,12 @@
 
 GPRAPI int32_t gpr_time_to_millis(gpr_timespec timespec);
 
-/* Return 1 if two times are equal or within threshold of each other,
+/** Return 1 if two times are equal or within threshold of each other,
    0 otherwise */
 GPRAPI int gpr_time_similar(gpr_timespec a, gpr_timespec b,
                             gpr_timespec threshold);
 
-/* Sleep until at least 'until' - an absolute timeout */
+/** Sleep until at least 'until' - an absolute timeout */
 GPRAPI void gpr_sleep_until(gpr_timespec until);
 
 GPRAPI double gpr_timespec_to_micros(gpr_timespec t);
diff --git a/include/grpc/support/tls.h b/include/grpc/support/tls.h
index 5365449..a48c73b 100644
--- a/include/grpc/support/tls.h
+++ b/include/grpc/support/tls.h
@@ -36,7 +36,7 @@
 
 #include <grpc/support/port_platform.h>
 
-/* Thread local storage.
+/** Thread local storage.
 
    A minimal wrapper that should be implementable across many compilers,
    and implementable efficiently across most modern compilers.
diff --git a/include/grpc/support/tls_gcc.h b/include/grpc/support/tls_gcc.h
index a47275f..9667524 100644
--- a/include/grpc/support/tls_gcc.h
+++ b/include/grpc/support/tls_gcc.h
@@ -38,7 +38,7 @@
 
 #include <grpc/support/log.h>
 
-/* Thread local storage based on gcc compiler primitives.
+/** Thread local storage based on gcc compiler primitives.
    #include tls.h to use this - and see that file for documentation */
 
 #ifndef NDEBUG
@@ -58,7 +58,7 @@
     *((tls)->inited) = true;               \
   } while (0)
 
-/* It is allowed to call gpr_tls_init after gpr_tls_destroy is called. */
+/** It is allowed to call gpr_tls_init after gpr_tls_destroy is called. */
 #define gpr_tls_destroy(tls)      \
   do {                            \
     GPR_ASSERT(*((tls)->inited)); \
diff --git a/include/grpc/support/tls_msvc.h b/include/grpc/support/tls_msvc.h
index efc653b..4ef8eef 100644
--- a/include/grpc/support/tls_msvc.h
+++ b/include/grpc/support/tls_msvc.h
@@ -34,7 +34,7 @@
 #ifndef GRPC_SUPPORT_TLS_MSVC_H
 #define GRPC_SUPPORT_TLS_MSVC_H
 
-/* Thread local storage based on ms visual c compiler primitives.
+/** Thread local storage based on ms visual c compiler primitives.
    #include tls.h to use this - and see that file for documentation */
 
 struct gpr_msvc_thread_local {
diff --git a/include/grpc/support/tls_pthread.h b/include/grpc/support/tls_pthread.h
index e681da2..7cc6a40 100644
--- a/include/grpc/support/tls_pthread.h
+++ b/include/grpc/support/tls_pthread.h
@@ -37,7 +37,7 @@
 #include <grpc/support/log.h> /* for GPR_ASSERT */
 #include <pthread.h>
 
-/* Thread local storage based on pthread library calls.
+/** Thread local storage based on pthread library calls.
    #include tls.h to use this - and see that file for documentation */
 
 struct gpr_pthread_thread_local {
diff --git a/include/grpc/support/useful.h b/include/grpc/support/useful.h
index 9d8314e..c261fba 100644
--- a/include/grpc/support/useful.h
+++ b/include/grpc/support/useful.h
@@ -34,12 +34,12 @@
 #ifndef GRPC_SUPPORT_USEFUL_H
 #define GRPC_SUPPORT_USEFUL_H
 
-/* useful macros that don't belong anywhere else */
+/** useful macros that don't belong anywhere else */
 
 #define GPR_MIN(a, b) ((a) < (b) ? (a) : (b))
 #define GPR_MAX(a, b) ((a) > (b) ? (a) : (b))
 #define GPR_CLAMP(a, min, max) ((a) < (min) ? (min) : (a) > (max) ? (max) : (a))
-/* rotl, rotr assume x is unsigned */
+/** rotl, rotr assume x is unsigned */
 #define GPR_ROTL(x, n) (((x) << (n)) | ((x) >> (sizeof(x) * 8 - (n))))
 #define GPR_ROTR(x, n) (((x) >> (n)) | ((x) << (sizeof(x) * 8 - (n))))
 
diff --git a/include/grpc/support/workaround_list.h b/include/grpc/support/workaround_list.h
new file mode 100644
index 0000000..ec47665
--- /dev/null
+++ b/include/grpc/support/workaround_list.h
@@ -0,0 +1,46 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_SUPPORT_WORKAROUND_LIST_H
+#define GRPC_SUPPORT_WORKAROUND_LIST_H
+
+/* The list of IDs of server workarounds currently maintained by gRPC. For
+ * explanation and detailed descriptions of workarounds, see
+ * /doc/workarounds.md
+ */
+typedef enum {
+  GRPC_WORKAROUND_ID_CRONET_COMPRESSION = 0,
+  GRPC_MAX_WORKAROUND_ID
+} grpc_workaround_list;
+
+#endif
diff --git a/package.json b/package.json
index e1499a0..1ed182c 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "lodash": "^4.15.0",
     "nan": "^2.0.0",
     "node-pre-gyp": "^0.6.0",
-    "protobufjs": "^6.7.0"
+    "protobufjs": "^5.0.0"
   },
   "devDependencies": {
     "async": "^2.0.1",
diff --git a/package.xml b/package.xml
index e70321a..e560139 100644
--- a/package.xml
+++ b/package.xml
@@ -10,7 +10,7 @@
   <email>grpc-packages@google.com</email>
   <active>yes</active>
  </lead>
- <date>2017-03-01</date>
+ <date>2017-05-05</date>
  <time>16:06:07</time>
  <version>
   <release>1.4.0dev</release>
@@ -22,8 +22,7 @@
  </stability>
  <license>BSD</license>
  <notes>
-- Added arg info macros #9751
-- Updated codegen to be consistent with protobuf #9492
+- Fixed some memory leaks #9559, #10996
  </notes>
  <contents>
   <dir baseinstalldir="/" name="/">
@@ -52,6 +51,7 @@
     <file baseinstalldir="/" name="src/php/ext/grpc/server.h" role="src" />
     <file baseinstalldir="/" name="src/php/ext/grpc/server_credentials.h" role="src" />
     <file baseinstalldir="/" name="src/php/ext/grpc/timeval.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/version.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/alloc.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/atm.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/atm_gcc_atomic.h" role="src" />
@@ -163,6 +163,7 @@
     <file baseinstalldir="/" name="include/grpc/slice.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/slice_buffer.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/status.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/workaround_list.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/byte_buffer_reader.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/compression_types.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/connectivity_state.h" role="src" />
@@ -398,6 +399,8 @@
     <file baseinstalldir="/" name="src/core/ext/census/tracing.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/filters/max_age/max_age_filter.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/filters/message_size/message_size_filter.h" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/filters/workarounds/workaround_utils.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/init.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/channel/channel_args.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/channel/channel_stack.c" role="src" />
@@ -425,6 +428,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epollsig_linux.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/ev_windows.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/exec_ctx.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/executor.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/iocp_windows.c" role="src" />
@@ -642,6 +646,8 @@
     <file baseinstalldir="/" name="src/core/ext/census/tracing.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/filters/max_age/max_age_filter.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/filters/message_size/message_size_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/ext/filters/workarounds/workaround_utils.c" role="src" />
     <file baseinstalldir="/" name="src/core/plugin_registry/grpc_plugin_registry.c" role="src" />
     <file baseinstalldir="/" name="third_party/boringssl/crypto/aes/internal.h" role="src" />
     <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/asn1_locl.h" role="src" />
@@ -1051,79 +1057,7 @@
     <file baseinstalldir="/" name="third_party/boringssl/ssl/tls13_server.c" role="src" />
     <file baseinstalldir="/" name="third_party/boringssl/ssl/tls_method.c" role="src" />
     <file baseinstalldir="/" name="third_party/boringssl/ssl/tls_record.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_data.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_dns.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_getenv.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_getopt.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_inet_net_pton.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_iphlpapi.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_ipv6.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_library_init.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_llist.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_nowarn.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_platform.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_private.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_rules.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_setup.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_strcasecmp.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_strdup.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_version.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/bitncmp.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/config-win32.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/setup_once.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/ares_build.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/config_linux/ares_config.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/config_darwin/ares_config.h" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares__close_sockets.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares__get_hostent.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares__read_line.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares__timeval.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_cancel.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_create_query.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_data.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_destroy.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_expand_name.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_expand_string.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_fds.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_free_hostent.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_free_string.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_getenv.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_gethostbyaddr.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_gethostbyname.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_getnameinfo.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_getopt.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_getsock.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_init.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_library_init.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_llist.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_mkquery.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_nowarn.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_options.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_a_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_aaaa_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_mx_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_naptr_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_ns_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_ptr_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_soa_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_srv_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_parse_txt_reply.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_platform.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_process.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_query.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_search.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_send.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_strcasecmp.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_strdup.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_strerror.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_timeout.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_version.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/ares_writev.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/bitncmp.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/inet_net_pton.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/inet_ntop.c" role="src" />
-    <file baseinstalldir="/" name="third_party/cares/cares/windows_port.c" role="src" />
+    <file name="LICENSE" role="doc" />
   </dir>
  </contents>
  <dependencies>
@@ -1439,5 +1373,21 @@
 - Updated codegen to be consistent with protobuf #9492
    </notes>
   </release>
+  <release>
+   <version>
+    <release>1.2.0</release>
+    <api>1.2.0</api>
+   </version>
+   <stability>
+    <release>stable</release>
+    <api>stable</api>
+   </stability>
+   <date>2017-03-20</date>
+   <license>BSD</license>
+   <notes>
+- Added arg info macros #9751
+- Updated codegen to be consistent with protobuf #9492
+   </notes>
+  </release>
  </changelog>
 </package>
diff --git a/src/compiler/config.h b/src/compiler/config.h
index ba44cd8..fd1400c 100644
--- a/src/compiler/config.h
+++ b/src/compiler/config.h
@@ -96,4 +96,11 @@
 }  // namespace protobuf
 }  // namespace grpc
 
+namespace grpc_cpp_generator {
+
+static const char* const kCppGeneratorMessageHeaderExt = ".pb.h";
+static const char* const kCppGeneratorServiceHeaderExt = ".grpc.pb.h";
+
+}  // namespace grpc_cpp_generator
+
 #endif  // SRC_COMPILER_CONFIG_H
diff --git a/src/compiler/cpp_generator.cc b/src/compiler/cpp_generator.cc
index a1a0258..7a2c44f 100644
--- a/src/compiler/cpp_generator.cc
+++ b/src/compiler/cpp_generator.cc
@@ -40,9 +40,6 @@
 namespace grpc_cpp_generator {
 namespace {
 
-grpc::string message_header_ext() { return ".pb.h"; }
-grpc::string service_header_ext() { return ".grpc.pb.h"; }
-
 template <class T>
 grpc::string as_string(T x) {
   std::ostringstream out;
@@ -113,7 +110,7 @@
     vars["filename"] = file->filename();
     vars["filename_identifier"] = FilenameIdentifier(file->filename());
     vars["filename_base"] = file->filename_without_ext();
-    vars["message_header_ext"] = message_header_ext();
+    vars["message_header_ext"] = kCppGeneratorMessageHeaderExt;
 
     printer->Print(vars, "// Generated by the gRPC C++ plugin.\n");
     printer->Print(vars,
@@ -128,6 +125,7 @@
     printer->Print(vars, "#define GRPC_$filename_identifier$__INCLUDED\n");
     printer->Print(vars, "\n");
     printer->Print(vars, "#include \"$filename_base$$message_header_ext$\"\n");
+    printer->Print(vars, file->additional_headers().c_str());
     printer->Print(vars, "\n");
   }
   return output;
@@ -1039,8 +1037,8 @@
 
     vars["filename"] = file->filename();
     vars["filename_base"] = file->filename_without_ext();
-    vars["message_header_ext"] = message_header_ext();
-    vars["service_header_ext"] = service_header_ext();
+    vars["message_header_ext"] = kCppGeneratorMessageHeaderExt;
+    vars["service_header_ext"] = kCppGeneratorServiceHeaderExt;
 
     printer->Print(vars, "// Generated by the gRPC C++ plugin.\n");
     printer->Print(vars,
@@ -1049,7 +1047,6 @@
 
     printer->Print(vars, "#include \"$filename_base$$message_header_ext$\"\n");
     printer->Print(vars, "#include \"$filename_base$$service_header_ext$\"\n");
-    printer->Print(vars, file->additional_headers().c_str());
     printer->Print(vars, "\n");
   }
   return output;
@@ -1425,8 +1422,8 @@
 
     vars["filename"] = file->filename();
     vars["filename_base"] = file->filename_without_ext();
-    vars["message_header_ext"] = message_header_ext();
-    vars["service_header_ext"] = service_header_ext();
+    vars["message_header_ext"] = kCppGeneratorMessageHeaderExt;
+    vars["service_header_ext"] = kCppGeneratorServiceHeaderExt;
 
     printer->Print(vars, "// Generated by the gRPC C++ plugin.\n");
     printer->Print(vars,
diff --git a/src/core/ext/filters/client_channel/client_channel.c b/src/core/ext/filters/client_channel/client_channel.c
index 24843d5..f2f27b9 100644
--- a/src/core/ext/filters/client_channel/client_channel.c
+++ b/src/core/ext/filters/client_channel/client_channel.c
@@ -914,10 +914,13 @@
   grpc_polling_entity_del_from_pollset_set(exec_ctx, calld->pollent,
                                            chand->interested_parties);
   if (calld->connected_subchannel == NULL) {
-    gpr_atm_no_barrier_store(&calld->subchannel_call, 1);
+    gpr_atm_no_barrier_store(&calld->subchannel_call, (gpr_atm)CANCELLED_CALL);
     fail_locked(exec_ctx, calld,
-                GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-                    "Failed to create subchannel", &error, 1));
+                error == GRPC_ERROR_NONE
+                    ? GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                          "Call dropped by load balancing policy")
+                    : GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                          "Failed to create subchannel", &error, 1));
   } else if (GET_CALL(calld) == CANCELLED_CALL) {
     /* already cancelled before subchannel became ready */
     grpc_error *cancellation_error =
@@ -1180,6 +1183,15 @@
             &calld->next_step)) {
       calld->pick_pending = false;
       GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_subchannel");
+      if (calld->connected_subchannel == NULL) {
+        gpr_atm_no_barrier_store(&calld->subchannel_call,
+                                 (gpr_atm)CANCELLED_CALL);
+        grpc_error *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+            "Call dropped by load balancing policy");
+        fail_locked(exec_ctx, calld, GRPC_ERROR_REF(error));
+        grpc_transport_stream_op_batch_finish_with_failure(exec_ctx, op, error);
+        return;  // Early out.
+      }
     } else {
       grpc_polling_entity_add_to_pollset_set(exec_ctx, calld->pollent,
                                              chand->interested_parties);
diff --git a/src/core/ext/filters/client_channel/lb_policy.h b/src/core/ext/filters/client_channel/lb_policy.h
index 184b2ef..fb4aa08 100644
--- a/src/core/ext/filters/client_channel/lb_policy.h
+++ b/src/core/ext/filters/client_channel/lb_policy.h
@@ -149,7 +149,9 @@
 
 /** Finds an appropriate subchannel for a call, based on \a pick_args.
 
-    \a target will be set to the selected subchannel, or NULL on failure.
+    \a target will be set to the selected subchannel, or NULL on failure
+    or when the LB policy decides to drop the call.
+
     Upon success, \a user_data will be set to whatever opaque information
     may need to be propagated from the LB policy, or NULL if not needed.
     \a context will be populated with context to pass to the subchannel
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c
index b7c0e92..d2a2856 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c
@@ -327,6 +327,11 @@
    * response has arrived. */
   grpc_grpclb_serverlist *serverlist;
 
+  /** Index into serverlist for next pick.
+   * If the server at this index is a drop, we return a drop.
+   * Otherwise, we delegate to the RR policy. */
+  size_t serverlist_index;
+
   /** list of picks that are waiting on RR's policy connectivity */
   pending_pick *pending_picks;
 
@@ -402,6 +407,9 @@
 
 static bool is_server_valid(const grpc_grpclb_server *server, size_t idx,
                             bool log) {
+  if (server->drop_for_rate_limiting || server->drop_for_load_balancing) {
+    return false;
+  }
   const grpc_grpclb_ip_address *ip = &server->ip_address;
   if (server->port >> 16 != 0) {
     if (log) {
@@ -411,7 +419,6 @@
     }
     return false;
   }
-
   if (ip->size != 4 && ip->size != 16) {
     if (log) {
       gpr_log(GPR_ERROR,
@@ -445,11 +452,12 @@
 
 static void parse_server(const grpc_grpclb_server *server,
                          grpc_resolved_address *addr) {
+  memset(addr, 0, sizeof(*addr));
+  if (server->drop_for_rate_limiting || server->drop_for_load_balancing) return;
   const uint16_t netorder_port = htons((uint16_t)server->port);
   /* the addresses are given in binary format (a in(6)_addr struct) in
    * server->ip_address.bytes. */
   const grpc_grpclb_ip_address *ip = &server->ip_address;
-  memset(addr, 0, sizeof(*addr));
   if (ip->size == 4) {
     addr->len = sizeof(struct sockaddr_in);
     struct sockaddr_in *addr4 = (struct sockaddr_in *)&addr->addr;
@@ -586,16 +594,51 @@
   return true;
 }
 
-/* perform a pick over \a rr_policy. Given that a pick can return immediately
- * (ignoring its completion callback) we need to perform the cleanups this
- * callback would be otherwise resposible for */
+/* 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.
+ * 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, grpc_lb_policy *rr_policy,
-    const grpc_lb_policy_pick_args *pick_args,
+    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) {
-  GPR_ASSERT(rr_policy != NULL);
+  // Look at the index into the serverlist to see if we should drop this call.
+  grpc_grpclb_server *server =
+      glb_policy->serverlist->servers[glb_policy->serverlist_index++];
+  if (glb_policy->serverlist_index == glb_policy->serverlist->num_servers) {
+    glb_policy->serverlist_index = 0;  // Wrap-around.
+  }
+  if (server->drop_for_rate_limiting || server->drop_for_load_balancing) {
+    // Not using the RR policy, so unref it.
+    if (GRPC_TRACER_ON(grpc_lb_glb_trace)) {
+      gpr_log(GPR_INFO, "Unreffing RR for drop (0x%" PRIxPTR ")",
+              (intptr_t)wc_arg->rr_policy);
+    }
+    GRPC_LB_POLICY_UNREF(exec_ctx, 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
+    // subchannel call (and therefore no client_load_reporting filter)
+    // for dropped calls.
+    grpc_grpclb_client_stats_add_call_started(wc_arg->client_stats);
+    grpc_grpclb_client_stats_add_call_finished(
+        server->drop_for_rate_limiting, server->drop_for_load_balancing,
+        false /* failed_to_send */, false /* known_received */,
+        wc_arg->client_stats);
+    grpc_grpclb_client_stats_unref(wc_arg->client_stats);
+    if (force_async) {
+      GPR_ASSERT(wc_arg->wrapped_closure != NULL);
+      grpc_closure_sched(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_NONE);
+      gpr_free(wc_arg->free_when_done);
+      return false;
+    }
+    gpr_free(wc_arg->free_when_done);
+    return true;
+  }
+  // Pick via the RR policy.
   const bool pick_done = grpc_lb_policy_pick_locked(
-      exec_ctx, rr_policy, pick_args, target, wc_arg->context,
+      exec_ctx, 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. */
@@ -604,17 +647,20 @@
               (intptr_t)wc_arg->rr_policy);
     }
     GRPC_LB_POLICY_UNREF(exec_ctx, wc_arg->rr_policy, "glb_pick_sync");
-
     /* add the load reporting initial metadata */
     initial_metadata_add_lb_token(exec_ctx, 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.
     GPR_ASSERT(wc_arg->client_stats != NULL);
     wc_arg->context[GRPC_GRPCLB_CLIENT_STATS].value = wc_arg->client_stats;
     wc_arg->context[GRPC_GRPCLB_CLIENT_STATS].destroy = destroy_client_stats;
-
+    if (force_async) {
+      GPR_ASSERT(wc_arg->wrapped_closure != NULL);
+      grpc_closure_sched(exec_ctx, wc_arg->wrapped_closure, GRPC_ERROR_NONE);
+      gpr_free(wc_arg->free_when_done);
+      return false;
+    }
     gpr_free(wc_arg->free_when_done);
   }
   /* else, the pending pick will be registered and taken care of by the
@@ -744,8 +790,8 @@
       gpr_log(GPR_INFO, "Pending pick about to PICK from 0x%" PRIxPTR "",
               (intptr_t)glb_policy->rr_policy);
     }
-    pick_from_internal_rr_locked(exec_ctx, glb_policy->rr_policy,
-                                 &pp->pick_args, pp->target,
+    pick_from_internal_rr_locked(exec_ctx, glb_policy, &pp->pick_args,
+                                 true /* force_async */, pp->target,
                                  &pp->wrapped_on_complete_arg);
   }
 
@@ -1115,8 +1161,9 @@
     wc_arg->lb_token_mdelem_storage = pick_args->lb_token_mdelem_storage;
     wc_arg->initial_metadata = pick_args->initial_metadata;
     wc_arg->free_when_done = wc_arg;
-    pick_done = pick_from_internal_rr_locked(exec_ctx, glb_policy->rr_policy,
-                                             pick_args, target, wc_arg);
+    pick_done =
+        pick_from_internal_rr_locked(exec_ctx, glb_policy, pick_args,
+                                     false /* force_async */, target, wc_arg);
   } else {
     if (GRPC_TRACER_ON(grpc_lb_glb_trace)) {
       gpr_log(GPR_DEBUG,
@@ -1517,7 +1564,7 @@
              * serverlist instance will be destroyed either upon the next
              * update or in glb_destroy() */
             glb_policy->serverlist = serverlist;
-
+            glb_policy->serverlist_index = 0;
             rr_handover_locked(exec_ctx, glb_policy);
           }
         } else {
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c
index 81b6932..90e7c2e 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c
@@ -37,44 +37,39 @@
 
 #include <grpc/support/alloc.h>
 
+/* invoked once for every Server in ServerList */
+static bool count_serverlist(pb_istream_t *stream, const pb_field_t *field,
+                             void **arg) {
+  grpc_grpclb_serverlist *sl = *arg;
+  grpc_grpclb_server server;
+  if (!pb_decode(stream, grpc_lb_v1_Server_fields, &server)) {
+    gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(stream));
+    return false;
+  }
+  ++sl->num_servers;
+  return true;
+}
+
 typedef struct decode_serverlist_arg {
-  /* The first pass counts the number of servers in the server list. The second
-   * one allocates and decodes. */
-  bool first_pass;
   /* The decoding callback is invoked once per server in serverlist. Remember
    * which index of the serverlist are we currently decoding */
   size_t decoding_idx;
-  /* Populated after the first pass. Number of server in the input serverlist */
-  size_t num_servers;
   /* The decoded serverlist */
-  grpc_grpclb_server **servers;
+  grpc_grpclb_serverlist *serverlist;
 } decode_serverlist_arg;
 
 /* invoked once for every Server in ServerList */
 static bool decode_serverlist(pb_istream_t *stream, const pb_field_t *field,
                               void **arg) {
   decode_serverlist_arg *dec_arg = *arg;
-  if (dec_arg->first_pass) { /* count how many server do we have */
-    grpc_grpclb_server server;
-    if (!pb_decode(stream, grpc_lb_v1_Server_fields, &server)) {
-      gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(stream));
-      return false;
-    }
-    dec_arg->num_servers++;
-  } else { /* second pass. Actually decode. */
-    grpc_grpclb_server *server = gpr_zalloc(sizeof(grpc_grpclb_server));
-    GPR_ASSERT(dec_arg->num_servers > 0);
-    if (dec_arg->decoding_idx == 0) { /* first iteration of second pass */
-      dec_arg->servers =
-          gpr_malloc(sizeof(grpc_grpclb_server *) * dec_arg->num_servers);
-    }
-    if (!pb_decode(stream, grpc_lb_v1_Server_fields, server)) {
-      gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(stream));
-      return false;
-    }
-    dec_arg->servers[dec_arg->decoding_idx++] = server;
+  GPR_ASSERT(dec_arg->serverlist->num_servers >= dec_arg->decoding_idx);
+  grpc_grpclb_server *server = gpr_zalloc(sizeof(grpc_grpclb_server));
+  if (!pb_decode(stream, grpc_lb_v1_Server_fields, server)) {
+    gpr_free(server);
+    gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(stream));
+    return false;
   }
-
+  dec_arg->serverlist->servers[dec_arg->decoding_idx++] = server;
   return true;
 }
 
@@ -165,36 +160,38 @@
 
 grpc_grpclb_serverlist *grpc_grpclb_response_parse_serverlist(
     grpc_slice encoded_grpc_grpclb_response) {
-  bool status;
-  decode_serverlist_arg arg;
   pb_istream_t stream =
       pb_istream_from_buffer(GRPC_SLICE_START_PTR(encoded_grpc_grpclb_response),
                              GRPC_SLICE_LENGTH(encoded_grpc_grpclb_response));
   pb_istream_t stream_at_start = stream;
+  grpc_grpclb_serverlist *sl = gpr_zalloc(sizeof(grpc_grpclb_serverlist));
   grpc_grpclb_response res;
   memset(&res, 0, sizeof(grpc_grpclb_response));
-  memset(&arg, 0, sizeof(decode_serverlist_arg));
-
-  res.server_list.servers.funcs.decode = decode_serverlist;
-  res.server_list.servers.arg = &arg;
-  arg.first_pass = true;
-  status = pb_decode(&stream, grpc_lb_v1_LoadBalanceResponse_fields, &res);
+  // First pass: count number of servers.
+  res.server_list.servers.funcs.decode = count_serverlist;
+  res.server_list.servers.arg = sl;
+  bool status = pb_decode(&stream, grpc_lb_v1_LoadBalanceResponse_fields, &res);
   if (!status) {
+    gpr_free(sl);
     gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(&stream));
     return NULL;
   }
-
-  arg.first_pass = false;
-  status =
-      pb_decode(&stream_at_start, grpc_lb_v1_LoadBalanceResponse_fields, &res);
-  if (!status) {
-    gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(&stream));
-    return NULL;
+  // Second pass: populate servers.
+  if (sl->num_servers > 0) {
+    sl->servers = gpr_zalloc(sizeof(grpc_grpclb_server *) * sl->num_servers);
+    decode_serverlist_arg decode_arg;
+    memset(&decode_arg, 0, sizeof(decode_arg));
+    decode_arg.serverlist = sl;
+    res.server_list.servers.funcs.decode = decode_serverlist;
+    res.server_list.servers.arg = &decode_arg;
+    status = pb_decode(&stream_at_start, grpc_lb_v1_LoadBalanceResponse_fields,
+                       &res);
+    if (!status) {
+      grpc_grpclb_destroy_serverlist(sl);
+      gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(&stream));
+      return NULL;
+    }
   }
-
-  grpc_grpclb_serverlist *sl = gpr_zalloc(sizeof(grpc_grpclb_serverlist));
-  sl->num_servers = arg.num_servers;
-  sl->servers = arg.servers;
   if (res.server_list.has_expiration_interval) {
     sl->expiration_interval = res.server_list.expiration_interval;
   }
@@ -228,7 +225,7 @@
 
 bool grpc_grpclb_serverlist_equals(const grpc_grpclb_serverlist *lhs,
                                    const grpc_grpclb_serverlist *rhs) {
-  if ((lhs == NULL) || (rhs == NULL)) {
+  if (lhs == NULL || rhs == NULL) {
     return false;
   }
   if (lhs->num_servers != rhs->num_servers) {
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 0687382..7f596ce 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
@@ -51,7 +51,7 @@
 typedef grpc_lb_v1_InitialLoadBalanceResponse grpc_grpclb_initial_response;
 typedef grpc_lb_v1_Server grpc_grpclb_server;
 typedef grpc_lb_v1_Duration grpc_grpclb_duration;
-typedef struct grpc_grpclb_serverlist {
+typedef struct {
   grpc_grpclb_server **servers;
   size_t num_servers;
   grpc_grpclb_duration expiration_interval;
diff --git a/src/core/ext/filters/client_channel/subchannel.c b/src/core/ext/filters/client_channel/subchannel.c
index 1af3393..dd14bf1 100644
--- a/src/core/ext/filters/client_channel/subchannel.c
+++ b/src/core/ext/filters/client_channel/subchannel.c
@@ -283,6 +283,7 @@
 void grpc_subchannel_unref(grpc_exec_ctx *exec_ctx,
                            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)) {
@@ -656,7 +657,6 @@
     gpr_free(sw_subchannel);
     grpc_channel_stack_destroy(exec_ctx, stk);
     gpr_free(con);
-    GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
     return false;
   }
 
diff --git a/src/core/ext/filters/client_channel/subchannel_index.c b/src/core/ext/filters/client_channel/subchannel_index.c
index f6ef4a8..b25dbfc 100644
--- a/src/core/ext/filters/client_channel/subchannel_index.c
+++ b/src/core/ext/filters/client_channel/subchannel_index.c
@@ -183,8 +183,11 @@
   enter_ctx(exec_ctx);
 
   grpc_subchannel *c = NULL;
+  bool need_to_unref_constructed;
 
   while (c == NULL) {
+    need_to_unref_constructed = false;
+
     // Compare and swap loop:
     // - take a reference to the current index
     gpr_mu_lock(&g_mu);
@@ -194,8 +197,11 @@
     // - Check to see if a subchannel already exists
     c = gpr_avl_get(index, key);
     if (c != NULL) {
+      c = GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(c, "index_register");
+    }
+    if (c != NULL) {
       // yes -> we're done
-      GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, constructed, "index_register");
+      need_to_unref_constructed = true;
     } else {
       // no -> update the avl and compare/swap
       gpr_avl updated =
@@ -219,6 +225,10 @@
 
   leave_ctx(exec_ctx);
 
+  if (need_to_unref_constructed) {
+    GRPC_SUBCHANNEL_UNREF(exec_ctx, constructed, "index_register");
+  }
+
   return c;
 }
 
diff --git a/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c
new file mode 100644
index 0000000..7fb75e3
--- /dev/null
+++ b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c
@@ -0,0 +1,223 @@
+//
+// Copyright 2017, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#include "src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+
+#include "src/core/ext/filters/workarounds/workaround_utils.h"
+#include "src/core/lib/channel/channel_stack_builder.h"
+#include "src/core/lib/surface/channel_init.h"
+#include "src/core/lib/transport/metadata.h"
+
+typedef struct call_data {
+  // Receive closures are chained: we inject this closure as the
+  // recv_initial_metadata_ready up-call on transport_stream_op, and remember to
+  // call our next_recv_initial_metadata_ready member after handling it.
+  grpc_closure recv_initial_metadata_ready;
+  // Used by recv_initial_metadata_ready.
+  grpc_metadata_batch* recv_initial_metadata;
+  // Original recv_initial_metadata_ready callback, invoked after our own.
+  grpc_closure* next_recv_initial_metadata_ready;
+
+  // Marks whether the workaround is active
+  bool workaround_active;
+} call_data;
+
+// Find the user agent metadata element in the batch
+static bool get_user_agent_mdelem(const grpc_metadata_batch* batch,
+                                  grpc_mdelem* md) {
+  if (batch->idx.named.user_agent != NULL) {
+    *md = batch->idx.named.user_agent->md;
+    return true;
+  }
+  return false;
+}
+
+// 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) {
+  grpc_call_element* elem = user_data;
+  call_data* calld = elem->call_data;
+
+  if (GRPC_ERROR_NONE == error) {
+    grpc_mdelem md;
+    if (get_user_agent_mdelem(calld->recv_initial_metadata, &md)) {
+      grpc_workaround_user_agent_md* user_agent_md = grpc_parse_user_agent(md);
+      if (user_agent_md
+              ->workaround_active[GRPC_WORKAROUND_ID_CRONET_COMPRESSION]) {
+        calld->workaround_active = true;
+      }
+    }
+  }
+
+  // Invoke the next callback.
+  grpc_closure_run(exec_ctx, 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) {
+  call_data* calld = elem->call_data;
+
+  // Inject callback for receiving initial metadata
+  if (op->recv_initial_metadata) {
+    calld->next_recv_initial_metadata_ready =
+        op->payload->recv_initial_metadata.recv_initial_metadata_ready;
+    op->payload->recv_initial_metadata.recv_initial_metadata_ready =
+        &calld->recv_initial_metadata_ready;
+    calld->recv_initial_metadata =
+        op->payload->recv_initial_metadata.recv_initial_metadata;
+  }
+
+  if (op->send_message) {
+    /* Send message happens after client's user-agent (initial metadata) is
+     * received, so workaround_active must be set already */
+    if (calld->workaround_active) {
+      op->payload->send_message.send_message->flags |= GRPC_WRITE_NO_COMPRESS;
+    }
+  }
+
+  // Chain to the next filter.
+  grpc_call_next_op(exec_ctx, elem, op);
+}
+
+// Constructor for call_data.
+static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
+                                  grpc_call_element* elem,
+                                  const grpc_call_element_args* args) {
+  call_data* calld = elem->call_data;
+  calld->next_recv_initial_metadata_ready = NULL;
+  calld->workaround_active = false;
+  grpc_closure_init(&calld->recv_initial_metadata_ready,
+                    recv_initial_metadata_ready, elem,
+                    grpc_schedule_on_exec_ctx);
+  return GRPC_ERROR_NONE;
+}
+
+// Destructor for call_data.
+static void destroy_call_elem(grpc_exec_ctx* exec_ctx, 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,
+                                     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) {}
+
+// Parse the user agent
+static bool parse_user_agent(grpc_mdelem md) {
+  const char grpc_objc_specifier[] = "grpc-objc/";
+  const size_t grpc_objc_specifier_len = sizeof(grpc_objc_specifier) - 1;
+  const char cronet_specifier[] = "cronet_http";
+  const size_t cronet_specifier_len = sizeof(cronet_specifier) - 1;
+
+  char* user_agent_str = grpc_slice_to_c_string(GRPC_MDVALUE(md));
+  bool grpc_objc_specifier_seen = false;
+  bool cronet_specifier_seen = false;
+  char *major_version_str = user_agent_str, *minor_version_str;
+  long major_version, minor_version;
+
+  char* head = strtok(user_agent_str, " ");
+  while (head != NULL) {
+    if (!grpc_objc_specifier_seen &&
+        0 == strncmp(head, grpc_objc_specifier, grpc_objc_specifier_len)) {
+      major_version_str = head + grpc_objc_specifier_len;
+      grpc_objc_specifier_seen = true;
+    } else if (grpc_objc_specifier_seen &&
+               0 == strncmp(head, cronet_specifier, cronet_specifier_len)) {
+      cronet_specifier_seen = true;
+      break;
+    }
+
+    head = strtok(NULL, " ");
+  }
+  if (grpc_objc_specifier_seen) {
+    major_version_str = strtok(major_version_str, ".");
+    minor_version_str = strtok(NULL, ".");
+    major_version = atol(major_version_str);
+    minor_version = atol(minor_version_str);
+  }
+
+  gpr_free(user_agent_str);
+  return (grpc_objc_specifier_seen && cronet_specifier_seen &&
+          (major_version < 1 || (major_version == 1 && minor_version <= 3)));
+}
+
+const grpc_channel_filter grpc_workaround_cronet_compression_filter = {
+    start_transport_stream_op_batch,
+    grpc_channel_next_op,
+    sizeof(call_data),
+    init_call_elem,
+    grpc_call_stack_ignore_set_pollset_or_pollset_set,
+    destroy_call_elem,
+    0,
+    init_channel_elem,
+    destroy_channel_elem,
+    grpc_call_next_get_peer,
+    grpc_channel_next_get_info,
+    "workaround_cronet_compression"};
+
+static bool register_workaround_cronet_compression(
+    grpc_exec_ctx* exec_ctx, 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(
+      channel_args, GRPC_ARG_WORKAROUND_CRONET_COMPRESSION);
+  if (a == NULL) {
+    return true;
+  }
+  if (grpc_channel_arg_get_bool(a, false) == false) {
+    return true;
+  }
+  return grpc_channel_stack_builder_prepend_filter(
+      builder, &grpc_workaround_cronet_compression_filter, NULL, NULL);
+}
+
+void grpc_workaround_cronet_compression_filter_init(void) {
+  grpc_channel_init_register_stage(
+      GRPC_SERVER_CHANNEL, GRPC_WORKAROUND_PRIORITY_HIGH,
+      register_workaround_cronet_compression, NULL);
+  grpc_register_workaround(GRPC_WORKAROUND_ID_CRONET_COMPRESSION,
+                           parse_user_agent);
+}
+
+void grpc_workaround_cronet_compression_filter_shutdown(void) {}
diff --git a/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h
new file mode 100644
index 0000000..58c79a0
--- /dev/null
+++ b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h
@@ -0,0 +1,40 @@
+//
+// Copyright 2017, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef GRPC_CORE_EXT_FILTERS_WORKAROUNDS_WORKAROUND_CRONET_COMPRESSION_FILTER_H
+#define GRPC_CORE_EXT_FILTERS_WORKAROUNDS_WORKAROUND_CRONET_COMPRESSION_FILTER_H
+
+#include "src/core/lib/channel/channel_stack.h"
+
+extern const grpc_channel_filter grpc_workaround_cronet_compression_filter;
+
+#endif /* GRPC_CORE_EXT_FILTERS_WORKAROUNDS_WORKAROUND_CRONET_COMPRESSION_FILTER_H \
+        */
diff --git a/src/core/ext/filters/workarounds/workaround_utils.c b/src/core/ext/filters/workarounds/workaround_utils.c
new file mode 100644
index 0000000..1c56538
--- /dev/null
+++ b/src/core/ext/filters/workarounds/workaround_utils.c
@@ -0,0 +1,65 @@
+//
+// Copyright 2017, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#include "src/core/ext/filters/workarounds/workaround_utils.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+user_agent_parser ua_parser[GRPC_MAX_WORKAROUND_ID];
+
+static void destroy_user_agent_md(void *user_agent_md) {
+  gpr_free(user_agent_md);
+}
+
+grpc_workaround_user_agent_md *grpc_parse_user_agent(grpc_mdelem md) {
+  grpc_workaround_user_agent_md *user_agent_md =
+      (grpc_workaround_user_agent_md *)grpc_mdelem_get_user_data(
+          md, destroy_user_agent_md);
+
+  if (NULL != user_agent_md) {
+    return user_agent_md;
+  }
+  user_agent_md = gpr_malloc(sizeof(grpc_workaround_user_agent_md));
+  for (int i = 0; i < GRPC_MAX_WORKAROUND_ID; i++) {
+    if (ua_parser[i]) {
+      user_agent_md->workaround_active[i] = ua_parser[i](md);
+    }
+  }
+  grpc_mdelem_set_user_data(md, destroy_user_agent_md, (void *)user_agent_md);
+
+  return user_agent_md;
+}
+
+void grpc_register_workaround(uint32_t id, user_agent_parser parser) {
+  GPR_ASSERT(id < GRPC_MAX_WORKAROUND_ID);
+  ua_parser[id] = parser;
+}
diff --git a/src/core/ext/filters/workarounds/workaround_utils.h b/src/core/ext/filters/workarounds/workaround_utils.h
new file mode 100644
index 0000000..7cd70c1
--- /dev/null
+++ b/src/core/ext/filters/workarounds/workaround_utils.h
@@ -0,0 +1,52 @@
+//
+// Copyright 2017, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#ifndef GRPC_CORE_EXT_FILTERS_WORKAROUNDS_WORKAROUND_UTILS_H
+#define GRPC_CORE_EXT_FILTERS_WORKAROUNDS_WORKAROUND_UTILS_H
+
+#include <grpc/support/workaround_list.h>
+
+#include "src/core/lib/transport/metadata.h"
+
+#define GRPC_WORKAROUND_PRIORITY_HIGH 10001
+#define GRPC_WORKAROUND_PROIRITY_LOW 9999
+
+typedef struct grpc_workaround_user_agent_md {
+  bool workaround_active[GRPC_MAX_WORKAROUND_ID];
+} grpc_workaround_user_agent_md;
+
+grpc_workaround_user_agent_md *grpc_parse_user_agent(grpc_mdelem md);
+
+typedef bool (*user_agent_parser)(grpc_mdelem);
+
+void grpc_register_workaround(uint32_t id, user_agent_parser parser);
+
+#endif
diff --git a/src/core/lib/channel/channel_args.c b/src/core/lib/channel/channel_args.c
index 238d176..247b134 100644
--- a/src/core/lib/channel/channel_args.c
+++ b/src/core/lib/channel/channel_args.c
@@ -31,6 +31,8 @@
  *
  */
 
+#include <grpc/support/port_platform.h>
+
 #include <limits.h>
 #include <string.h>
 
diff --git a/src/core/lib/iomgr/error.c b/src/core/lib/iomgr/error.c
index 5f2c989..685581b 100644
--- a/src/core/lib/iomgr/error.c
+++ b/src/core/lib/iomgr/error.c
@@ -769,7 +769,7 @@
               GRPC_ERROR_INT_ERRNO, err),
           GRPC_ERROR_STR_OS_ERROR,
           grpc_slice_from_static_string(strerror(err))),
-      GRPC_ERROR_STR_SYSCALL, grpc_slice_from_static_string(call_name));
+      GRPC_ERROR_STR_SYSCALL, grpc_slice_from_copied_string(call_name));
 }
 
 #ifdef GPR_WINDOWS
diff --git a/src/core/lib/iomgr/ev_epollsig_linux.c b/src/core/lib/iomgr/ev_epollsig_linux.c
index 52362a6..92c555b 100644
--- a/src/core/lib/iomgr/ev_epollsig_linux.c
+++ b/src/core/lib/iomgr/ev_epollsig_linux.c
@@ -65,9 +65,9 @@
 
 #define GRPC_POLLSET_KICK_BROADCAST ((grpc_pollset_worker *)1)
 
-#define GRPC_POLLING_TRACE(fmt, ...)        \
+#define GRPC_POLLING_TRACE(...)             \
   if (GRPC_TRACER_ON(grpc_polling_trace)) { \
-    gpr_log(GPR_INFO, (fmt), __VA_ARGS__);  \
+    gpr_log(GPR_INFO, __VA_ARGS__);         \
   }
 
 /* Uncomment the following to enable extra checks on poll_object operations */
@@ -732,7 +732,7 @@
      it right now. Note that since we do an anticipatory mpscq_pop every poll
      loop, it's ok if we miss the wakeup here, as we'll get the work item when
      the next poller enters anyway. */
-  if (current_pollers > min_current_pollers_for_wakeup) {
+  if (current_pollers >= min_current_pollers_for_wakeup) {
     GRPC_LOG_IF_ERROR("workqueue_wakeup_fd",
                       grpc_wakeup_fd_wakeup(&pi->workqueue_wakeup_fd));
   }
@@ -1332,7 +1332,13 @@
     gpr_mpscq_node *n = gpr_mpscq_pop(&pi->workqueue_items);
     gpr_mu_unlock(&pi->workqueue_read_mu);
     if (n != NULL) {
-      if (gpr_atm_full_fetch_add(&pi->workqueue_item_count, -1) > 1) {
+      gpr_atm remaining =
+          gpr_atm_full_fetch_add(&pi->workqueue_item_count, -1) - 1;
+      GRPC_POLLING_TRACE(
+          "maybe_do_workqueue_work: pi: %p: got closure %p, remaining = "
+          "%" PRIdPTR,
+          pi, n, remaining);
+      if (remaining > 0) {
         workqueue_maybe_wakeup(pi);
       }
       grpc_closure *c = (grpc_closure *)n;
@@ -1347,8 +1353,13 @@
       /* n == NULL might mean there's work but it's not available to be popped
        * yet - try to ensure another workqueue wakes up to check shortly if so
        */
+      GRPC_POLLING_TRACE(
+          "maybe_do_workqueue_work: pi: %p: more to do, but not yet", pi);
       workqueue_maybe_wakeup(pi);
     }
+  } else {
+    GRPC_POLLING_TRACE("maybe_do_workqueue_work: pi: %p: read already locked",
+                       pi);
   }
   return false;
 }
@@ -1411,7 +1422,10 @@
   /* If we get some workqueue work to do, it might end up completing an item on
      the completion queue, so there's no need to poll... so we skip that and
      redo the complete loop to verify */
+  GRPC_POLLING_TRACE("pollset_work: pollset: %p, worker %p, pi %p", pollset,
+                     worker, pi);
   if (!maybe_do_workqueue_work(exec_ctx, pi)) {
+    GRPC_POLLING_TRACE("pollset_work: begins");
     gpr_atm_no_barrier_fetch_add(&pi->poller_count, 1);
     g_current_thread_polling_island = pi;
 
@@ -1472,6 +1486,7 @@
 
     g_current_thread_polling_island = NULL;
     gpr_atm_no_barrier_fetch_add(&pi->poller_count, -1);
+    GRPC_POLLING_TRACE("pollset_work: ends");
   }
 
   GPR_ASSERT(pi != NULL);
diff --git a/src/core/lib/iomgr/ev_windows.c b/src/core/lib/iomgr/ev_windows.c
new file mode 100644
index 0000000..7bf7327
--- /dev/null
+++ b/src/core/lib/iomgr/ev_windows.c
@@ -0,0 +1,43 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/port.h"
+
+#ifdef GRPC_WINSOCK_SOCKET
+
+#include "src/core/lib/debug/trace.h"
+
+grpc_tracer_flag grpc_polling_trace =
+    GRPC_TRACER_INITIALIZER(false); /* Disabled by default */
+
+#endif  // GRPC_WINSOCK_SOCKET
diff --git a/src/core/lib/iomgr/tcp_server_uv.c b/src/core/lib/iomgr/tcp_server_uv.c
index e924694..d446e53 100644
--- a/src/core/lib/iomgr/tcp_server_uv.c
+++ b/src/core/lib/iomgr/tcp_server_uv.c
@@ -56,6 +56,8 @@
   int port;
   /* linked list */
   struct grpc_tcp_listener *next;
+
+  bool closed;
 };
 
 struct grpc_tcp_server {
@@ -77,6 +79,8 @@
   /* shutdown callback */
   grpc_closure *shutdown_complete;
 
+  bool shutdown;
+
   grpc_resource_quota *resource_quota;
 };
 
@@ -109,6 +113,7 @@
   s->shutdown_starting.head = NULL;
   s->shutdown_starting.tail = NULL;
   s->shutdown_complete = shutdown_complete;
+  s->shutdown = false;
   *server = s;
   return GRPC_ERROR_NONE;
 }
@@ -125,6 +130,7 @@
 }
 
 static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
+  GPR_ASSERT(s->shutdown);
   if (s->shutdown_complete != NULL) {
     grpc_closure_sched(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE);
   }
@@ -144,21 +150,31 @@
   grpc_tcp_listener *sp = (grpc_tcp_listener *)handle->data;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   sp->server->open_ports--;
-  if (sp->server->open_ports == 0) {
+  if (sp->server->open_ports == 0 && sp->server->shutdown) {
     finish_shutdown(&exec_ctx, sp->server);
   }
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
+static void close_listener(grpc_tcp_listener *sp) {
+  if (!sp->closed) {
+    sp->closed = true;
+    uv_close((uv_handle_t *)sp->handle, handle_close_callback);
+  }
+}
+
 static void tcp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
   int immediately_done = 0;
   grpc_tcp_listener *sp;
 
+  GPR_ASSERT(!s->shutdown);
+  s->shutdown = true;
+
   if (s->open_ports == 0) {
     immediately_done = 1;
   }
   for (sp = s->head; sp; sp = sp->next) {
-    uv_close((uv_handle_t *)sp->handle, handle_close_callback);
+    close_listener(sp);
   }
 
   if (immediately_done) {
@@ -196,9 +212,14 @@
   int err;
 
   if (status < 0) {
-    gpr_log(GPR_INFO, "Skipping on_accept due to error: %s",
-            uv_strerror(status));
-    return;
+    switch (status) {
+      case UV_EINTR:
+      case UV_EAGAIN:
+        return;
+      default:
+        close_listener(sp);
+        return;
+    }
   }
 
   client = gpr_malloc(sizeof(uv_tcp_t));
@@ -287,6 +308,7 @@
   sp->handle = handle;
   sp->port = port;
   sp->port_index = port_index;
+  sp->closed = false;
   handle->data = sp;
   s->open_ports++;
   GPR_ASSERT(sp->handle);
diff --git a/src/core/lib/iomgr/tcp_uv.c b/src/core/lib/iomgr/tcp_uv.c
index e715753..dc23e4f 100644
--- a/src/core/lib/iomgr/tcp_uv.c
+++ b/src/core/lib/iomgr/tcp_uv.c
@@ -88,12 +88,12 @@
 #ifdef GRPC_TCP_REFCOUNT_DEBUG
 #define TCP_UNREF(exec_ctx, tcp, reason) \
   tcp_unref((exec_ctx), (tcp), (reason), __FILE__, __LINE__)
-#define TCP_REF(tcp, reason) \
-  tcp_ref((exec_ctx), (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) {
-  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP unref %p : %s %d -> %d", tcp,
-          reason, tcp->refcount.count, tcp->refcount.count - 1);
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
+          "TCP unref %p : %s %" PRIiPTR " -> %" PRIiPTR, tcp, reason,
+          tcp->refcount.count, tcp->refcount.count - 1);
   if (gpr_unref(&tcp->refcount)) {
     tcp_free(exec_ctx, tcp);
   }
@@ -101,8 +101,9 @@
 
 static void tcp_ref(grpc_tcp *tcp, const char *reason, const char *file,
                     int line) {
-  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "TCP   ref %p : %s %d -> %d", tcp,
-          reason, tcp->refcount.count, tcp->refcount.count + 1);
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
+          "TCP   ref %p : %s %" PRIiPTR " -> %" PRIiPTR, tcp, reason,
+          tcp->refcount.count, tcp->refcount.count + 1);
   gpr_ref(&tcp->refcount);
 }
 #else
@@ -311,6 +312,7 @@
     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_ERROR_UNREF(why);
 }
diff --git a/src/core/lib/support/mpscq.c b/src/core/lib/support/mpscq.c
index 1015cc6..822abd0 100644
--- a/src/core/lib/support/mpscq.c
+++ b/src/core/lib/support/mpscq.c
@@ -46,11 +46,12 @@
   GPR_ASSERT(q->tail == &q->stub);
 }
 
-void gpr_mpscq_push(gpr_mpscq *q, gpr_mpscq_node *n) {
+bool gpr_mpscq_push(gpr_mpscq *q, gpr_mpscq_node *n) {
   gpr_atm_no_barrier_store(&n->next, (gpr_atm)NULL);
   gpr_mpscq_node *prev =
       (gpr_mpscq_node *)gpr_atm_full_xchg(&q->head, (gpr_atm)n);
   gpr_atm_rel_store(&prev->next, (gpr_atm)n);
+  return prev == &q->stub;
 }
 
 gpr_mpscq_node *gpr_mpscq_pop(gpr_mpscq *q) {
@@ -92,3 +93,25 @@
   *empty = false;
   return NULL;
 }
+
+void gpr_locked_mpscq_init(gpr_locked_mpscq *q) {
+  gpr_mpscq_init(&q->queue);
+  q->read_lock = GPR_SPINLOCK_INITIALIZER;
+}
+
+void gpr_locked_mpscq_destroy(gpr_locked_mpscq *q) {
+  gpr_mpscq_destroy(&q->queue);
+}
+
+bool gpr_locked_mpscq_push(gpr_locked_mpscq *q, gpr_mpscq_node *n) {
+  return gpr_mpscq_push(&q->queue, n);
+}
+
+gpr_mpscq_node *gpr_locked_mpscq_pop(gpr_locked_mpscq *q) {
+  if (gpr_spinlock_trylock(&q->read_lock)) {
+    gpr_mpscq_node *n = gpr_mpscq_pop(&q->queue);
+    gpr_spinlock_unlock(&q->read_lock);
+    return n;
+  }
+  return NULL;
+}
diff --git a/src/core/lib/support/mpscq.h b/src/core/lib/support/mpscq.h
index 24c89f9..b3a1716 100644
--- a/src/core/lib/support/mpscq.h
+++ b/src/core/lib/support/mpscq.h
@@ -37,6 +37,7 @@
 #include <grpc/support/atm.h>
 #include <stdbool.h>
 #include <stddef.h>
+#include "src/core/lib/support/spinlock.h"
 
 // Multiple-producer single-consumer lock free queue, based upon the
 // implementation from Dmitry Vyukov here:
@@ -58,12 +59,34 @@
 void gpr_mpscq_init(gpr_mpscq *q);
 void gpr_mpscq_destroy(gpr_mpscq *q);
 // Push a node
-void gpr_mpscq_push(gpr_mpscq *q, gpr_mpscq_node *n);
+// Thread safe - can be called from multiple threads concurrently
+// Returns true if this was possibly the first node (may return true
+// sporadically, will not return false sporadically)
+bool gpr_mpscq_push(gpr_mpscq *q, gpr_mpscq_node *n);
 // Pop a node (returns NULL if no node is ready - which doesn't indicate that
 // the queue is empty!!)
+// Thread compatible - can only be called from one thread at a time
 gpr_mpscq_node *gpr_mpscq_pop(gpr_mpscq *q);
-
 // Pop a node; sets *empty to true if the queue is empty, or false if it is not
 gpr_mpscq_node *gpr_mpscq_pop_and_check_end(gpr_mpscq *q, bool *empty);
 
+// An mpscq with a spinlock: it's safe to pop from multiple threads, but doing
+// only one thread will succeed concurrently
+typedef struct gpr_locked_mpscq {
+  gpr_mpscq queue;
+  gpr_spinlock read_lock;
+} gpr_locked_mpscq;
+
+void gpr_locked_mpscq_init(gpr_locked_mpscq *q);
+void gpr_locked_mpscq_destroy(gpr_locked_mpscq *q);
+// Push a node
+// Thread safe - can be called from multiple threads concurrently
+// Returns true if this was possibly the first node (may return true
+// sporadically, will not return false sporadically)
+bool gpr_locked_mpscq_push(gpr_locked_mpscq *q, gpr_mpscq_node *n);
+// Pop a node (returns NULL if no node is ready - which doesn't indicate that
+// the queue is empty!!)
+// Thread safe - can be called from multiple threads concurrently
+gpr_mpscq_node *gpr_locked_mpscq_pop(gpr_locked_mpscq *q);
+
 #endif /* GRPC_CORE_LIB_SUPPORT_MPSCQ_H */
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index df5b702..de90594 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -30,7 +30,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
-
 #include "src/core/lib/surface/completion_queue.h"
 
 #include <stdio.h>
@@ -45,6 +44,7 @@
 #include "src/core/lib/iomgr/pollset.h"
 #include "src/core/lib/iomgr/timer.h"
 #include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/spinlock.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/call.h"
@@ -201,33 +201,68 @@
      .destroy = non_polling_poller_destroy},
 };
 
-/* Completion queue structure */
-struct grpc_completion_queue {
-  /** owned by pollset */
+typedef struct cq_vtable {
+  grpc_cq_completion_type cq_completion_type;
+  size_t (*size)();
+  void (*begin_op)(grpc_completion_queue *cc, void *tag);
+  void (*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 *done_arg, grpc_cq_completion *storage);
+  grpc_event (*next)(grpc_completion_queue *cc, gpr_timespec deadline,
+                     void *reserved);
+  grpc_event (*pluck)(grpc_completion_queue *cc, void *tag,
+                      gpr_timespec deadline, void *reserved);
+} cq_vtable;
+
+/* Queue that holds the cq_completion_events. Internally uses gpr_mpscq queue
+ * (a lockfree multiproducer single consumer queue). It uses a queue_lock
+ * to support multiple consumers.
+ * Only used in completion queues whose completion_type is GRPC_CQ_NEXT */
+typedef struct grpc_cq_event_queue {
+  /* Spinlock to serialize consumers i.e pop() operations */
+  gpr_spinlock queue_lock;
+
+  gpr_mpscq queue;
+
+  /* A lazy counter of number of items in the queue. This is NOT atomically
+     incremented/decremented along with push/pop operations and hence is only
+     eventually consistent */
+  gpr_atm num_queue_items;
+} grpc_cq_event_queue;
+
+/* TODO: sreek Refactor this based on the completion_type. Put completion-type
+ * specific data in a different structure (and co-allocate memory for it along
+ * with completion queue + pollset )*/
+typedef struct cq_data {
   gpr_mu *mu;
 
-  grpc_cq_completion_type completion_type;
-
-  const cq_poller_vtable *poller_vtable;
-
-  /** completed events */
+  /** Completed events for completion-queues of type GRPC_CQ_PLUCK */
   grpc_cq_completion completed_head;
   grpc_cq_completion *completed_tail;
+
+  /** Completed events for completion-queues of type GRPC_CQ_NEXT */
+  grpc_cq_event_queue queue;
+
   /** Number of pending events (+1 if we're not shutdown) */
   gpr_refcount pending_events;
+
   /** Once owning_refs drops to zero, we will destroy the cq */
   gpr_refcount owning_refs;
-  /** counter of how many things have ever been queued on this completion queue
+
+  /** Counter of how many things have ever been queued on this completion queue
       useful for avoiding locks to check the queue */
   gpr_atm things_queued_ever;
+
   /** 0 initially, 1 once we've begun shutting down */
-  int shutdown;
+  gpr_atm shutdown;
   int shutdown_called;
+
   int is_server_cq;
-  /** Can the server cq accept incoming channels */
-  /* TODO: sreek - This will no longer be needed. Use polling_type set */
-  int is_non_listening_server_cq;
+
   int num_pluckers;
+  int num_polls;
   plucker pluckers[GRPC_MAX_COMPLETION_QUEUE_PLUCKERS];
   grpc_closure pollset_shutdown_done;
 
@@ -236,8 +271,61 @@
   size_t outstanding_tag_count;
   size_t outstanding_tag_capacity;
 #endif
+} cq_data;
 
-  grpc_completion_queue *next_free;
+/* Completion queue structure */
+struct grpc_completion_queue {
+  cq_data data;
+  const cq_vtable *vtable;
+  const cq_poller_vtable *poller_vtable;
+};
+
+/* Forward declarations */
+static void cq_finish_shutdown(grpc_exec_ctx *exec_ctx,
+                               grpc_completion_queue *cc);
+
+static size_t cq_size(grpc_completion_queue *cc);
+
+static void cq_begin_op(grpc_completion_queue *cc, void *tag);
+
+static void cq_end_op_for_next(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 *done_arg, grpc_cq_completion *storage);
+
+static void cq_end_op_for_pluck(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 *done_arg, grpc_cq_completion *storage);
+
+static grpc_event cq_next(grpc_completion_queue *cc, gpr_timespec deadline,
+                          void *reserved);
+
+static grpc_event cq_pluck(grpc_completion_queue *cc, void *tag,
+                           gpr_timespec deadline, void *reserved);
+
+/* Completion queue vtables based on the completion-type */
+static const cq_vtable g_cq_vtable[] = {
+    /* GRPC_CQ_NEXT */
+    {.cq_completion_type = GRPC_CQ_NEXT,
+     .size = cq_size,
+     .begin_op = cq_begin_op,
+     .end_op = cq_end_op_for_next,
+     .next = cq_next,
+     .pluck = NULL},
+    /* GRPC_CQ_PLUCK */
+    {.cq_completion_type = GRPC_CQ_PLUCK,
+     .size = cq_size,
+     .begin_op = cq_begin_op,
+     .end_op = cq_end_op_for_pluck,
+     .next = NULL,
+     .pluck = cq_pluck},
 };
 
 #define POLLSET_FROM_CQ(cq) ((grpc_pollset *)(cq + 1))
@@ -258,6 +346,47 @@
 static void on_pollset_shutdown_done(grpc_exec_ctx *exec_ctx, void *cc,
                                      grpc_error *error);
 
+static void cq_event_queue_init(grpc_cq_event_queue *q) {
+  gpr_mpscq_init(&q->queue);
+  q->queue_lock = GPR_SPINLOCK_INITIALIZER;
+  gpr_atm_no_barrier_store(&q->num_queue_items, 0);
+}
+
+static void cq_event_queue_destroy(grpc_cq_event_queue *q) {
+  gpr_mpscq_destroy(&q->queue);
+}
+
+static void cq_event_queue_push(grpc_cq_event_queue *q, grpc_cq_completion *c) {
+  gpr_mpscq_push(&q->queue, (gpr_mpscq_node *)c);
+  gpr_atm_no_barrier_fetch_add(&q->num_queue_items, 1);
+}
+
+static grpc_cq_completion *cq_event_queue_pop(grpc_cq_event_queue *q) {
+  grpc_cq_completion *c = NULL;
+  if (gpr_spinlock_trylock(&q->queue_lock)) {
+    c = (grpc_cq_completion *)gpr_mpscq_pop(&q->queue);
+    gpr_spinlock_unlock(&q->queue_lock);
+  }
+
+  if (c) {
+    gpr_atm_no_barrier_fetch_add(&q->num_queue_items, -1);
+  }
+
+  return c;
+}
+
+/* Note: The counter is not incremented/decremented atomically with push/pop.
+ * The count is only eventually consistent */
+static long cq_event_queue_num_items(grpc_cq_event_queue *q) {
+  return (long)gpr_atm_no_barrier_load(&q->num_queue_items);
+}
+
+static size_t cq_size(grpc_completion_queue *cc) {
+  /* Size of the completion queue and the size of the pollset whose memory is
+     allocated right after that of completion queue */
+  return sizeof(grpc_completion_queue) + cc->poller_vtable->size();
+}
+
 grpc_completion_queue *grpc_completion_queue_create_internal(
     grpc_cq_completion_type completion_type,
     grpc_cq_polling_type polling_type) {
@@ -270,35 +399,40 @@
       "polling_type=%d)",
       2, (completion_type, polling_type));
 
+  const cq_vtable *vtable = &g_cq_vtable[completion_type];
   const cq_poller_vtable *poller_vtable =
       &g_poller_vtable_by_poller_type[polling_type];
 
   cc = gpr_zalloc(sizeof(grpc_completion_queue) + poller_vtable->size());
-  poller_vtable->init(POLLSET_FROM_CQ(cc), &cc->mu);
-#ifndef NDEBUG
-  cc->outstanding_tags = NULL;
-  cc->outstanding_tag_capacity = 0;
-#endif
+  cq_data *cqd = &cc->data;
 
-  cc->completion_type = completion_type;
+  cc->vtable = vtable;
   cc->poller_vtable = poller_vtable;
 
-  /* Initial ref is dropped by grpc_completion_queue_shutdown */
-  gpr_ref_init(&cc->pending_events, 1);
-  /* One for destroy(), one for pollset_shutdown */
-  gpr_ref_init(&cc->owning_refs, 2);
-  cc->completed_tail = &cc->completed_head;
-  cc->completed_head.next = (uintptr_t)cc->completed_tail;
-  cc->shutdown = 0;
-  cc->shutdown_called = 0;
-  cc->is_server_cq = 0;
-  cc->is_non_listening_server_cq = 0;
-  cc->num_pluckers = 0;
-  gpr_atm_no_barrier_store(&cc->things_queued_ever, 0);
+  poller_vtable->init(POLLSET_FROM_CQ(cc), &cc->data.mu);
+
 #ifndef NDEBUG
-  cc->outstanding_tag_count = 0;
+  cqd->outstanding_tags = NULL;
+  cqd->outstanding_tag_capacity = 0;
 #endif
-  grpc_closure_init(&cc->pollset_shutdown_done, on_pollset_shutdown_done, cc,
+
+  /* Initial ref is dropped by grpc_completion_queue_shutdown */
+  gpr_ref_init(&cqd->pending_events, 1);
+  /* One for destroy(), one for pollset_shutdown */
+  gpr_ref_init(&cqd->owning_refs, 2);
+  cqd->completed_tail = &cqd->completed_head;
+  cqd->completed_head.next = (uintptr_t)cqd->completed_tail;
+  gpr_atm_no_barrier_store(&cqd->shutdown, 0);
+  cqd->shutdown_called = 0;
+  cqd->is_server_cq = 0;
+  cqd->num_pluckers = 0;
+  cqd->num_polls = 0;
+  gpr_atm_no_barrier_store(&cqd->things_queued_ever, 0);
+#ifndef NDEBUG
+  cqd->outstanding_tag_count = 0;
+#endif
+  cq_event_queue_init(&cqd->queue);
+  grpc_closure_init(&cqd->pollset_shutdown_done, on_pollset_shutdown_done, cc,
                     grpc_schedule_on_exec_ctx);
 
   GPR_TIMER_END("grpc_completion_queue_create_internal", 0);
@@ -307,18 +441,28 @@
 }
 
 grpc_cq_completion_type grpc_get_cq_completion_type(grpc_completion_queue *cc) {
-  return cc->completion_type;
+  return cc->vtable->cq_completion_type;
+}
+
+int grpc_get_cq_poll_num(grpc_completion_queue *cc) {
+  int cur_num_polls;
+  gpr_mu_lock(cc->data.mu);
+  cur_num_polls = cc->data.num_polls;
+  gpr_mu_unlock(cc->data.mu);
+  return cur_num_polls;
 }
 
 #ifdef GRPC_CQ_REF_COUNT_DEBUG
 void grpc_cq_internal_ref(grpc_completion_queue *cc, const char *reason,
                           const char *file, int line) {
+  cq_data *cqd = &cc->data;
   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "CQ:%p   ref %d -> %d %s", cc,
-          (int)cc->owning_refs.count, (int)cc->owning_refs.count + 1, reason);
+          (int)cqd->owning_refs.count, (int)cqd->owning_refs.count + 1, reason);
 #else
 void grpc_cq_internal_ref(grpc_completion_queue *cc) {
+  cq_data *cqd = &cc->data;
 #endif
-  gpr_ref(&cc->owning_refs);
+  gpr_ref(&cqd->owning_refs);
 }
 
 static void on_pollset_shutdown_done(grpc_exec_ctx *exec_ctx, void *arg,
@@ -328,63 +472,160 @@
 }
 
 #ifdef GRPC_CQ_REF_COUNT_DEBUG
-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) {
+  cq_data *cqd = &cc->data;
   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "CQ:%p unref %d -> %d %s", cc,
-          (int)cc->owning_refs.count, (int)cc->owning_refs.count - 1, reason);
+          (int)cqd->owning_refs.count, (int)cqd->owning_refs.count - 1, reason);
 #else
 void grpc_cq_internal_unref(grpc_exec_ctx *exec_ctx,
                             grpc_completion_queue *cc) {
+  cq_data *cqd = &cc->data;
 #endif
-  if (gpr_unref(&cc->owning_refs)) {
-    GPR_ASSERT(cc->completed_head.next == (uintptr_t)&cc->completed_head);
+  if (gpr_unref(&cqd->owning_refs)) {
+    GPR_ASSERT(cqd->completed_head.next == (uintptr_t)&cqd->completed_head);
     cc->poller_vtable->destroy(exec_ctx, POLLSET_FROM_CQ(cc));
+    cq_event_queue_destroy(&cqd->queue);
 #ifndef NDEBUG
-    gpr_free(cc->outstanding_tags);
+    gpr_free(cqd->outstanding_tags);
 #endif
     gpr_free(cc);
   }
 }
 
-void grpc_cq_begin_op(grpc_completion_queue *cc, void *tag) {
+static void cq_begin_op(grpc_completion_queue *cc, void *tag) {
+  cq_data *cqd = &cc->data;
 #ifndef NDEBUG
-  gpr_mu_lock(cc->mu);
-  GPR_ASSERT(!cc->shutdown_called);
-  if (cc->outstanding_tag_count == cc->outstanding_tag_capacity) {
-    cc->outstanding_tag_capacity = GPR_MAX(4, 2 * cc->outstanding_tag_capacity);
-    cc->outstanding_tags =
-        gpr_realloc(cc->outstanding_tags, sizeof(*cc->outstanding_tags) *
-                                              cc->outstanding_tag_capacity);
+  gpr_mu_lock(cqd->mu);
+  GPR_ASSERT(!cqd->shutdown_called);
+  if (cqd->outstanding_tag_count == cqd->outstanding_tag_capacity) {
+    cqd->outstanding_tag_capacity =
+        GPR_MAX(4, 2 * cqd->outstanding_tag_capacity);
+    cqd->outstanding_tags =
+        gpr_realloc(cqd->outstanding_tags, sizeof(*cqd->outstanding_tags) *
+                                               cqd->outstanding_tag_capacity);
   }
-  cc->outstanding_tags[cc->outstanding_tag_count++] = tag;
-  gpr_mu_unlock(cc->mu);
+  cqd->outstanding_tags[cqd->outstanding_tag_count++] = tag;
+  gpr_mu_unlock(cqd->mu);
 #endif
-  gpr_ref(&cc->pending_events);
+  gpr_ref(&cqd->pending_events);
 }
 
-/* Signal the end of an operation - if this is the last waiting-to-be-queued
-   event, then enter shutdown mode */
-/* Queue a GRPC_OP_COMPLETED operation */
-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 *done_arg, grpc_cq_completion *storage) {
-  int shutdown;
-  int i;
-  grpc_pollset_worker *pluck_worker;
+void grpc_cq_begin_op(grpc_completion_queue *cc, void *tag) {
+  cc->vtable->begin_op(cc, tag);
+}
+
 #ifndef NDEBUG
+static void cq_check_tag(grpc_completion_queue *cc, void *tag, bool lock_cq) {
+  cq_data *cqd = &cc->data;
   int found = 0;
+  if (lock_cq) {
+    gpr_mu_lock(cqd->mu);
+  }
+
+  for (int i = 0; i < (int)cqd->outstanding_tag_count; i++) {
+    if (cqd->outstanding_tags[i] == tag) {
+      cqd->outstanding_tag_count--;
+      GPR_SWAP(void *, cqd->outstanding_tags[i],
+               cqd->outstanding_tags[cqd->outstanding_tag_count]);
+      found = 1;
+      break;
+    }
+  }
+
+  if (lock_cq) {
+    gpr_mu_unlock(cqd->mu);
+  }
+
+  GPR_ASSERT(found);
+}
+#else
+static void cq_check_tag(grpc_completion_queue *cc, void *tag, bool lock_cq) {}
 #endif
 
-  GPR_TIMER_BEGIN("grpc_cq_end_op", 0);
+/* 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 *cc, void *tag,
+                               grpc_error *error,
+                               void (*done)(grpc_exec_ctx *exec_ctx,
+                                            void *done_arg,
+                                            grpc_cq_completion *storage),
+                               void *done_arg, grpc_cq_completion *storage) {
+  GPR_TIMER_BEGIN("cq_end_op_for_next", 0);
+
   if (GRPC_TRACER_ON(grpc_api_trace) ||
       (GRPC_TRACER_ON(grpc_trace_operation_failures) &&
        error != GRPC_ERROR_NONE)) {
     const char *errmsg = grpc_error_string(error);
     GRPC_API_TRACE(
-        "grpc_cq_end_op(exec_ctx=%p, cc=%p, tag=%p, error=%s, done=%p, "
-        "done_arg=%p, storage=%p)",
+        "cq_end_op_for_next(exec_ctx=%p, cc=%p, tag=%p, error=%s, "
+        "done=%p, done_arg=%p, storage=%p)",
+        7, (exec_ctx, cc, tag, errmsg, done, done_arg, storage));
+    if (GRPC_TRACER_ON(grpc_trace_operation_failures) &&
+        error != GRPC_ERROR_NONE) {
+      gpr_log(GPR_ERROR, "Operation failed: tag=%p, error=%s", tag, errmsg);
+    }
+  }
+
+  cq_data *cqd = &cc->data;
+  int is_success = (error == GRPC_ERROR_NONE);
+
+  storage->tag = tag;
+  storage->done = done;
+  storage->done_arg = done_arg;
+  storage->next = (uintptr_t)(is_success);
+
+  cq_check_tag(cc, tag, true); /* Used in debug builds only */
+
+  /* Add the completion to the queue */
+  cq_event_queue_push(&cqd->queue, storage);
+  gpr_atm_no_barrier_fetch_add(&cqd->things_queued_ever, 1);
+
+  gpr_mu_lock(cqd->mu);
+
+  int shutdown = gpr_unref(&cqd->pending_events);
+  if (!shutdown) {
+    grpc_error *kick_error = cc->poller_vtable->kick(POLLSET_FROM_CQ(cc), NULL);
+    gpr_mu_unlock(cqd->mu);
+
+    if (kick_error != GRPC_ERROR_NONE) {
+      const char *msg = grpc_error_string(kick_error);
+      gpr_log(GPR_ERROR, "Kick failed: %s", msg);
+
+      GRPC_ERROR_UNREF(kick_error);
+    }
+  } else {
+    cq_finish_shutdown(exec_ctx, cc);
+    gpr_mu_unlock(cqd->mu);
+  }
+
+  GPR_TIMER_END("cq_end_op_for_next", 0);
+
+  GRPC_ERROR_UNREF(error);
+}
+
+/* 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 *cc, void *tag,
+                                grpc_error *error,
+                                void (*done)(grpc_exec_ctx *exec_ctx,
+                                             void *done_arg,
+                                             grpc_cq_completion *storage),
+                                void *done_arg, grpc_cq_completion *storage) {
+  cq_data *cqd = &cc->data;
+  int is_success = (error == GRPC_ERROR_NONE);
+
+  GPR_TIMER_BEGIN("cq_end_op_for_pluck", 0);
+
+  if (GRPC_TRACER_ON(grpc_api_trace) ||
+      (GRPC_TRACER_ON(grpc_trace_operation_failures) &&
+       error != GRPC_ERROR_NONE)) {
+    const char *errmsg = grpc_error_string(error);
+    GRPC_API_TRACE(
+        "cq_end_op_for_pluck(exec_ctx=%p, cc=%p, tag=%p, error=%s, "
+        "done=%p, done_arg=%p, storage=%p)",
         7, (exec_ctx, cc, tag, errmsg, done, done_arg, storage));
     if (GRPC_TRACER_ON(grpc_trace_operation_failures) &&
         error != GRPC_ERROR_NONE) {
@@ -395,38 +636,32 @@
   storage->tag = tag;
   storage->done = done;
   storage->done_arg = done_arg;
-  storage->next = ((uintptr_t)&cc->completed_head) |
-                  ((uintptr_t)(error == GRPC_ERROR_NONE));
+  storage->next = ((uintptr_t)&cqd->completed_head) | ((uintptr_t)(is_success));
 
-  gpr_mu_lock(cc->mu);
-#ifndef NDEBUG
-  for (i = 0; i < (int)cc->outstanding_tag_count; i++) {
-    if (cc->outstanding_tags[i] == tag) {
-      cc->outstanding_tag_count--;
-      GPR_SWAP(void *, cc->outstanding_tags[i],
-               cc->outstanding_tags[cc->outstanding_tag_count]);
-      found = 1;
-      break;
-    }
-  }
-  GPR_ASSERT(found);
-#endif
-  shutdown = gpr_unref(&cc->pending_events);
-  gpr_atm_no_barrier_fetch_add(&cc->things_queued_ever, 1);
+  gpr_mu_lock(cqd->mu);
+  cq_check_tag(cc, tag, false); /* Used in debug builds only */
+
+  /* Add to the list of completions */
+  gpr_atm_no_barrier_fetch_add(&cqd->things_queued_ever, 1);
+  cqd->completed_tail->next =
+      ((uintptr_t)storage) | (1u & (uintptr_t)cqd->completed_tail->next);
+  cqd->completed_tail = storage;
+
+  int shutdown = gpr_unref(&cqd->pending_events);
   if (!shutdown) {
-    cc->completed_tail->next =
-        ((uintptr_t)storage) | (1u & (uintptr_t)cc->completed_tail->next);
-    cc->completed_tail = storage;
-    pluck_worker = NULL;
-    for (i = 0; i < cc->num_pluckers; i++) {
-      if (cc->pluckers[i].tag == tag) {
-        pluck_worker = *cc->pluckers[i].worker;
+    grpc_pollset_worker *pluck_worker = NULL;
+    for (int i = 0; i < cqd->num_pluckers; i++) {
+      if (cqd->pluckers[i].tag == tag) {
+        pluck_worker = *cqd->pluckers[i].worker;
         break;
       }
     }
+
     grpc_error *kick_error =
         cc->poller_vtable->kick(POLLSET_FROM_CQ(cc), pluck_worker);
-    gpr_mu_unlock(cc->mu);
+
+    gpr_mu_unlock(cqd->mu);
+
     if (kick_error != GRPC_ERROR_NONE) {
       const char *msg = grpc_error_string(kick_error);
       gpr_log(GPR_ERROR, "Kick failed: %s", msg);
@@ -434,22 +669,23 @@
       GRPC_ERROR_UNREF(kick_error);
     }
   } else {
-    cc->completed_tail->next =
-        ((uintptr_t)storage) | (1u & (uintptr_t)cc->completed_tail->next);
-    cc->completed_tail = storage;
-    GPR_ASSERT(!cc->shutdown);
-    GPR_ASSERT(cc->shutdown_called);
-    cc->shutdown = 1;
-    cc->poller_vtable->shutdown(exec_ctx, POLLSET_FROM_CQ(cc),
-                                &cc->pollset_shutdown_done);
-    gpr_mu_unlock(cc->mu);
+    cq_finish_shutdown(exec_ctx, cc);
+    gpr_mu_unlock(cqd->mu);
   }
 
-  GPR_TIMER_END("grpc_cq_end_op", 0);
+  GPR_TIMER_END("cq_end_op_for_pluck", 0);
 
   GRPC_ERROR_UNREF(error);
 }
 
+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 *done_arg, grpc_cq_completion *storage) {
+  cc->vtable->end_op(exec_ctx, cc, tag, error, done, done_arg, storage);
+}
+
 typedef struct {
   gpr_atm last_seen_things_queued_ever;
   grpc_completion_queue *cq;
@@ -462,23 +698,24 @@
 static bool cq_is_next_finished(grpc_exec_ctx *exec_ctx, void *arg) {
   cq_is_finished_arg *a = arg;
   grpc_completion_queue *cq = a->cq;
+  cq_data *cqd = &cq->data;
   GPR_ASSERT(a->stolen_completion == NULL);
+
   gpr_atm current_last_seen_things_queued_ever =
-      gpr_atm_no_barrier_load(&cq->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 =
-        gpr_atm_no_barrier_load(&cq->things_queued_ever);
-    if (cq->completed_tail != &cq->completed_head) {
-      a->stolen_completion = (grpc_cq_completion *)cq->completed_head.next;
-      cq->completed_head.next = a->stolen_completion->next & ~(uintptr_t)1;
-      if (a->stolen_completion == cq->completed_tail) {
-        cq->completed_tail = &cq->completed_head;
-      }
-      gpr_mu_unlock(cq->mu);
+        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 != NULL) {
       return true;
     }
-    gpr_mu_unlock(cq->mu);
   }
   return !a->first_loop &&
          gpr_time_cmp(a->deadline, gpr_now(a->deadline.clock_type)) < 0;
@@ -488,16 +725,18 @@
 static void dump_pending_tags(grpc_completion_queue *cc) {
   if (!GRPC_TRACER_ON(grpc_trace_pending_tags)) return;
 
+  cq_data *cqd = &cc->data;
+
   gpr_strvec v;
   gpr_strvec_init(&v);
   gpr_strvec_add(&v, gpr_strdup("PENDING TAGS:"));
-  gpr_mu_lock(cc->mu);
-  for (size_t i = 0; i < cc->outstanding_tag_count; i++) {
+  gpr_mu_lock(cqd->mu);
+  for (size_t i = 0; i < cqd->outstanding_tag_count; i++) {
     char *s;
-    gpr_asprintf(&s, " %p", cc->outstanding_tags[i]);
+    gpr_asprintf(&s, " %p", cqd->outstanding_tags[i]);
     gpr_strvec_add(&v, s);
   }
-  gpr_mu_unlock(cc->mu);
+  gpr_mu_unlock(cqd->mu);
   char *out = gpr_strvec_flatten(&v, NULL);
   gpr_strvec_destroy(&v);
   gpr_log(GPR_DEBUG, "%s", out);
@@ -507,17 +746,11 @@
 static void dump_pending_tags(grpc_completion_queue *cc) {}
 #endif
 
-grpc_event grpc_completion_queue_next(grpc_completion_queue *cc,
-                                      gpr_timespec deadline, void *reserved) {
+static grpc_event cq_next(grpc_completion_queue *cc, gpr_timespec deadline,
+                          void *reserved) {
   grpc_event ret;
   gpr_timespec now;
-
-  if (cc->completion_type != GRPC_CQ_NEXT) {
-    gpr_log(GPR_ERROR,
-            "grpc_completion_queue_next() cannot be called on this completion "
-            "queue since its completion type is not GRPC_CQ_NEXT");
-    abort();
-  }
+  cq_data *cqd = &cc->data;
 
   GPR_TIMER_BEGIN("grpc_completion_queue_next", 0);
 
@@ -536,10 +769,10 @@
   deadline = gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC);
 
   GRPC_CQ_INTERNAL_REF(cc, "next");
-  gpr_mu_lock(cc->mu);
+
   cq_is_finished_arg is_finished_arg = {
       .last_seen_things_queued_ever =
-          gpr_atm_no_barrier_load(&cc->things_queued_ever),
+          gpr_atm_no_barrier_load(&cqd->things_queued_ever),
       .cq = cc,
       .deadline = deadline,
       .stolen_completion = NULL,
@@ -547,9 +780,11 @@
       .first_loop = true};
   grpc_exec_ctx exec_ctx =
       GRPC_EXEC_CTX_INITIALIZER(0, cq_is_next_finished, &is_finished_arg);
+
   for (;;) {
+    gpr_timespec iteration_deadline = deadline;
+
     if (is_finished_arg.stolen_completion != NULL) {
-      gpr_mu_unlock(cc->mu);
       grpc_cq_completion *c = is_finished_arg.stolen_completion;
       is_finished_arg.stolen_completion = NULL;
       ret.type = GRPC_OP_COMPLETE;
@@ -558,37 +793,59 @@
       c->done(&exec_ctx, c->done_arg, c);
       break;
     }
-    if (cc->completed_tail != &cc->completed_head) {
-      grpc_cq_completion *c = (grpc_cq_completion *)cc->completed_head.next;
-      cc->completed_head.next = c->next & ~(uintptr_t)1;
-      if (c == cc->completed_tail) {
-        cc->completed_tail = &cc->completed_head;
-      }
-      gpr_mu_unlock(cc->mu);
+
+    grpc_cq_completion *c = cq_event_queue_pop(&cqd->queue);
+
+    if (c != NULL) {
       ret.type = GRPC_OP_COMPLETE;
       ret.success = c->next & 1u;
       ret.tag = c->tag;
       c->done(&exec_ctx, c->done_arg, c);
       break;
+    } else {
+      /* If c == NULL it means either the queue is empty OR in an transient
+         inconsistent state. If it is the latter, we shold do a 0-timeout poll
+         so that the thread comes back quickly from poll to make a second
+         attempt at popping. Not doing this can potentially deadlock this thread
+         forever (if the deadline is infinity) */
+      if (cq_event_queue_num_items(&cqd->queue) > 0) {
+        iteration_deadline = gpr_time_0(GPR_CLOCK_MONOTONIC);
+      }
     }
-    if (cc->shutdown) {
-      gpr_mu_unlock(cc->mu);
+
+    if (gpr_atm_no_barrier_load(&cqd->shutdown)) {
+      /* Before returning, check if the queue has any items left over (since
+         gpr_mpscq_pop() can sometimes return NULL even if the queue is not
+         empty. If so, keep retrying but do not return GRPC_QUEUE_SHUTDOWN */
+      if (cq_event_queue_num_items(&cqd->queue) > 0) {
+        /* Go to the beginning of the loop. No point doing a poll because
+           (cc->shutdown == true) is only possible when there is no pending work
+           (i.e cc->pending_events == 0) and any outstanding grpc_cq_completion
+           events are already queued on this cq */
+        continue;
+      }
+
       memset(&ret, 0, sizeof(ret));
       ret.type = GRPC_QUEUE_SHUTDOWN;
       break;
     }
+
     now = gpr_now(GPR_CLOCK_MONOTONIC);
     if (!is_finished_arg.first_loop && gpr_time_cmp(now, deadline) >= 0) {
-      gpr_mu_unlock(cc->mu);
       memset(&ret, 0, sizeof(ret));
       ret.type = GRPC_QUEUE_TIMEOUT;
       dump_pending_tags(cc);
       break;
     }
+
+    /* The main polling work happens in grpc_pollset_work */
+    gpr_mu_lock(cqd->mu);
+    cqd->num_polls++;
     grpc_error *err = cc->poller_vtable->work(&exec_ctx, POLLSET_FROM_CQ(cc),
-                                              NULL, now, deadline);
+                                              NULL, now, iteration_deadline);
+    gpr_mu_unlock(cqd->mu);
+
     if (err != GRPC_ERROR_NONE) {
-      gpr_mu_unlock(cc->mu);
       const char *msg = grpc_error_string(err);
       gpr_log(GPR_ERROR, "Completion queue next failed: %s", msg);
 
@@ -600,6 +857,7 @@
     }
     is_finished_arg.first_loop = false;
   }
+
   GRPC_SURFACE_TRACE_RETURNED_EVENT(cc, &ret);
   GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cc, "next");
   grpc_exec_ctx_finish(&exec_ctx);
@@ -610,24 +868,30 @@
   return ret;
 }
 
+grpc_event grpc_completion_queue_next(grpc_completion_queue *cc,
+                                      gpr_timespec deadline, void *reserved) {
+  return cc->vtable->next(cc, deadline, reserved);
+}
+
 static int add_plucker(grpc_completion_queue *cc, void *tag,
                        grpc_pollset_worker **worker) {
-  if (cc->num_pluckers == GRPC_MAX_COMPLETION_QUEUE_PLUCKERS) {
+  cq_data *cqd = &cc->data;
+  if (cqd->num_pluckers == GRPC_MAX_COMPLETION_QUEUE_PLUCKERS) {
     return 0;
   }
-  cc->pluckers[cc->num_pluckers].tag = tag;
-  cc->pluckers[cc->num_pluckers].worker = worker;
-  cc->num_pluckers++;
+  cqd->pluckers[cqd->num_pluckers].tag = tag;
+  cqd->pluckers[cqd->num_pluckers].worker = worker;
+  cqd->num_pluckers++;
   return 1;
 }
 
 static void del_plucker(grpc_completion_queue *cc, void *tag,
                         grpc_pollset_worker **worker) {
-  int i;
-  for (i = 0; i < cc->num_pluckers; i++) {
-    if (cc->pluckers[i].tag == tag && cc->pluckers[i].worker == worker) {
-      cc->num_pluckers--;
-      GPR_SWAP(plucker, cc->pluckers[i], cc->pluckers[cc->num_pluckers]);
+  cq_data *cqd = &cc->data;
+  for (int i = 0; i < cqd->num_pluckers; i++) {
+    if (cqd->pluckers[i].tag == tag && cqd->pluckers[i].worker == worker) {
+      cqd->num_pluckers--;
+      GPR_SWAP(plucker, cqd->pluckers[i], cqd->pluckers[cqd->num_pluckers]);
       return;
     }
   }
@@ -637,51 +901,47 @@
 static bool cq_is_pluck_finished(grpc_exec_ctx *exec_ctx, void *arg) {
   cq_is_finished_arg *a = arg;
   grpc_completion_queue *cq = a->cq;
+  cq_data *cqd = &cq->data;
+
   GPR_ASSERT(a->stolen_completion == NULL);
   gpr_atm current_last_seen_things_queued_ever =
-      gpr_atm_no_barrier_load(&cq->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);
+    gpr_mu_lock(cqd->mu);
     a->last_seen_things_queued_ever =
-        gpr_atm_no_barrier_load(&cq->things_queued_ever);
+        gpr_atm_no_barrier_load(&cqd->things_queued_ever);
     grpc_cq_completion *c;
-    grpc_cq_completion *prev = &cq->completed_head;
+    grpc_cq_completion *prev = &cqd->completed_head;
     while ((c = (grpc_cq_completion *)(prev->next & ~(uintptr_t)1)) !=
-           &cq->completed_head) {
+           &cqd->completed_head) {
       if (c->tag == a->tag) {
         prev->next = (prev->next & (uintptr_t)1) | (c->next & ~(uintptr_t)1);
-        if (c == cq->completed_tail) {
-          cq->completed_tail = prev;
+        if (c == cqd->completed_tail) {
+          cqd->completed_tail = prev;
         }
-        gpr_mu_unlock(cq->mu);
+        gpr_mu_unlock(cqd->mu);
         a->stolen_completion = c;
         return true;
       }
       prev = c;
     }
-    gpr_mu_unlock(cq->mu);
+    gpr_mu_unlock(cqd->mu);
   }
   return !a->first_loop &&
          gpr_time_cmp(a->deadline, gpr_now(a->deadline.clock_type)) < 0;
 }
 
-grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cc, void *tag,
-                                       gpr_timespec deadline, void *reserved) {
+static grpc_event cq_pluck(grpc_completion_queue *cc, void *tag,
+                           gpr_timespec deadline, void *reserved) {
   grpc_event ret;
   grpc_cq_completion *c;
   grpc_cq_completion *prev;
   grpc_pollset_worker *worker = NULL;
   gpr_timespec now;
+  cq_data *cqd = &cc->data;
 
   GPR_TIMER_BEGIN("grpc_completion_queue_pluck", 0);
 
-  if (cc->completion_type != GRPC_CQ_PLUCK) {
-    gpr_log(GPR_ERROR,
-            "grpc_completion_queue_pluck() cannot be called on this completion "
-            "queue since its completion type is not GRPC_CQ_PLUCK");
-    abort();
-  }
-
   if (GRPC_TRACER_ON(grpc_cq_pluck_trace)) {
     GRPC_API_TRACE(
         "grpc_completion_queue_pluck("
@@ -699,10 +959,10 @@
   deadline = gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC);
 
   GRPC_CQ_INTERNAL_REF(cc, "pluck");
-  gpr_mu_lock(cc->mu);
+  gpr_mu_lock(cqd->mu);
   cq_is_finished_arg is_finished_arg = {
       .last_seen_things_queued_ever =
-          gpr_atm_no_barrier_load(&cc->things_queued_ever),
+          gpr_atm_no_barrier_load(&cqd->things_queued_ever),
       .cq = cc,
       .deadline = deadline,
       .stolen_completion = NULL,
@@ -712,7 +972,7 @@
       GRPC_EXEC_CTX_INITIALIZER(0, cq_is_pluck_finished, &is_finished_arg);
   for (;;) {
     if (is_finished_arg.stolen_completion != NULL) {
-      gpr_mu_unlock(cc->mu);
+      gpr_mu_unlock(cqd->mu);
       c = is_finished_arg.stolen_completion;
       is_finished_arg.stolen_completion = NULL;
       ret.type = GRPC_OP_COMPLETE;
@@ -721,15 +981,15 @@
       c->done(&exec_ctx, c->done_arg, c);
       break;
     }
-    prev = &cc->completed_head;
+    prev = &cqd->completed_head;
     while ((c = (grpc_cq_completion *)(prev->next & ~(uintptr_t)1)) !=
-           &cc->completed_head) {
+           &cqd->completed_head) {
       if (c->tag == tag) {
         prev->next = (prev->next & (uintptr_t)1) | (c->next & ~(uintptr_t)1);
-        if (c == cc->completed_tail) {
-          cc->completed_tail = prev;
+        if (c == cqd->completed_tail) {
+          cqd->completed_tail = prev;
         }
-        gpr_mu_unlock(cc->mu);
+        gpr_mu_unlock(cqd->mu);
         ret.type = GRPC_OP_COMPLETE;
         ret.success = c->next & 1u;
         ret.tag = c->tag;
@@ -738,8 +998,8 @@
       }
       prev = c;
     }
-    if (cc->shutdown) {
-      gpr_mu_unlock(cc->mu);
+    if (gpr_atm_no_barrier_load(&cqd->shutdown)) {
+      gpr_mu_unlock(cqd->mu);
       memset(&ret, 0, sizeof(ret));
       ret.type = GRPC_QUEUE_SHUTDOWN;
       break;
@@ -749,7 +1009,7 @@
               "Too many outstanding grpc_completion_queue_pluck calls: maximum "
               "is %d",
               GRPC_MAX_COMPLETION_QUEUE_PLUCKERS);
-      gpr_mu_unlock(cc->mu);
+      gpr_mu_unlock(cqd->mu);
       memset(&ret, 0, sizeof(ret));
       /* TODO(ctiller): should we use a different result here */
       ret.type = GRPC_QUEUE_TIMEOUT;
@@ -759,19 +1019,21 @@
     now = gpr_now(GPR_CLOCK_MONOTONIC);
     if (!is_finished_arg.first_loop && gpr_time_cmp(now, deadline) >= 0) {
       del_plucker(cc, tag, &worker);
-      gpr_mu_unlock(cc->mu);
+      gpr_mu_unlock(cqd->mu);
       memset(&ret, 0, sizeof(ret));
       ret.type = GRPC_QUEUE_TIMEOUT;
       dump_pending_tags(cc);
       break;
     }
+
+    cqd->num_polls++;
     grpc_error *err = cc->poller_vtable->work(&exec_ctx, POLLSET_FROM_CQ(cc),
                                               &worker, now, deadline);
     if (err != GRPC_ERROR_NONE) {
       del_plucker(cc, tag, &worker);
-      gpr_mu_unlock(cc->mu);
+      gpr_mu_unlock(cqd->mu);
       const char *msg = grpc_error_string(err);
-      gpr_log(GPR_ERROR, "Completion queue next failed: %s", msg);
+      gpr_log(GPR_ERROR, "Completion queue pluck failed: %s", msg);
 
       GRPC_ERROR_UNREF(err);
       memset(&ret, 0, sizeof(ret));
@@ -793,26 +1055,48 @@
   return ret;
 }
 
+grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cc, void *tag,
+                                       gpr_timespec deadline, void *reserved) {
+  return cc->vtable->pluck(cc, tag, deadline, reserved);
+}
+
+/* Finishes the completion queue shutdown. This means that there are no more
+   completion events / tags expected from the completion queue
+   - Must be called under completion queue lock
+   - 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(grpc_exec_ctx *exec_ctx,
+                               grpc_completion_queue *cc) {
+  cq_data *cqd = &cc->data;
+
+  GPR_ASSERT(cqd->shutdown_called);
+  GPR_ASSERT(!gpr_atm_no_barrier_load(&cqd->shutdown));
+  gpr_atm_no_barrier_store(&cqd->shutdown, 1);
+
+  cc->poller_vtable->shutdown(exec_ctx, POLLSET_FROM_CQ(cc),
+                              &cqd->pollset_shutdown_done);
+}
+
 /* 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 *cc) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   GPR_TIMER_BEGIN("grpc_completion_queue_shutdown", 0);
   GRPC_API_TRACE("grpc_completion_queue_shutdown(cc=%p)", 1, (cc));
-  gpr_mu_lock(cc->mu);
-  if (cc->shutdown_called) {
-    gpr_mu_unlock(cc->mu);
+  cq_data *cqd = &cc->data;
+
+  gpr_mu_lock(cqd->mu);
+  if (cqd->shutdown_called) {
+    gpr_mu_unlock(cqd->mu);
     GPR_TIMER_END("grpc_completion_queue_shutdown", 0);
     return;
   }
-  cc->shutdown_called = 1;
-  if (gpr_unref(&cc->pending_events)) {
-    GPR_ASSERT(!cc->shutdown);
-    cc->shutdown = 1;
-    cc->poller_vtable->shutdown(&exec_ctx, POLLSET_FROM_CQ(cc),
-                                &cc->pollset_shutdown_done);
+  cqd->shutdown_called = 1;
+  if (gpr_unref(&cqd->pending_events)) {
+    cq_finish_shutdown(&exec_ctx, cc);
   }
-  gpr_mu_unlock(cc->mu);
+  gpr_mu_unlock(cqd->mu);
   grpc_exec_ctx_finish(&exec_ctx);
   GPR_TIMER_END("grpc_completion_queue_shutdown", 0);
 }
@@ -821,6 +1105,13 @@
   GRPC_API_TRACE("grpc_completion_queue_destroy(cc=%p)", 1, (cc));
   GPR_TIMER_BEGIN("grpc_completion_queue_destroy", 0);
   grpc_completion_queue_shutdown(cc);
+
+  /* TODO (sreek): This should not ideally be here. Refactor it into the
+   * cq_vtable (perhaps have a create/destroy methods in the cq vtable) */
+  if (cc->vtable->cq_completion_type == GRPC_CQ_NEXT) {
+    GPR_ASSERT(cq_event_queue_num_items(&cc->data.queue) == 0);
+  }
+
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   GRPC_CQ_INTERNAL_UNREF(&exec_ctx, cc, "destroy");
   grpc_exec_ctx_finish(&exec_ctx);
@@ -835,22 +1126,12 @@
   return CQ_FROM_POLLSET(ps);
 }
 
-void grpc_cq_mark_non_listening_server_cq(grpc_completion_queue *cc) {
-  /* TODO: sreek - use cc->polling_type field here and add a validation check
-     (i.e grpc_cq_mark_non_listening_server_cq can only be called on a cc whose
-     polling_type is set to GRPC_CQ_NON_LISTENING */
-  cc->is_non_listening_server_cq = 1;
+void grpc_cq_mark_server_cq(grpc_completion_queue *cc) {
+  cc->data.is_server_cq = 1;
 }
 
-bool grpc_cq_is_non_listening_server_cq(grpc_completion_queue *cc) {
-  /* TODO (sreek) - return (cc->polling_type == GRPC_CQ_NON_LISTENING) */
-  return (cc->is_non_listening_server_cq == 1);
-}
-
-void grpc_cq_mark_server_cq(grpc_completion_queue *cc) { cc->is_server_cq = 1; }
-
 bool grpc_cq_is_server_cq(grpc_completion_queue *cc) {
-  return cc->is_server_cq;
+  return cc->data.is_server_cq;
 }
 
 bool grpc_cq_can_listen(grpc_completion_queue *cc) {
diff --git a/src/core/lib/surface/completion_queue.h b/src/core/lib/surface/completion_queue.h
index 8d9ce2e..7963ea7 100644
--- a/src/core/lib/surface/completion_queue.h
+++ b/src/core/lib/surface/completion_queue.h
@@ -49,7 +49,13 @@
 extern grpc_tracer_flag grpc_trace_pending_tags;
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct grpc_cq_completion {
+  gpr_mpscq_node node;
+
   /** user supplied tag */
   void *tag;
   /** done callback - called when this queue element is no longer
@@ -101,7 +107,13 @@
 
 grpc_cq_completion_type grpc_get_cq_completion_type(grpc_completion_queue *cc);
 
+int grpc_get_cq_poll_num(grpc_completion_queue *cc);
+
 grpc_completion_queue *grpc_completion_queue_create_internal(
     grpc_cq_completion_type completion_type, grpc_cq_polling_type polling_type);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* GRPC_CORE_LIB_SURFACE_COMPLETION_QUEUE_H */
diff --git a/src/core/lib/surface/server.c b/src/core/lib/surface/server.c
index 560229e..7e4ae42 100644
--- a/src/core/lib/surface/server.c
+++ b/src/core/lib/surface/server.c
@@ -47,7 +47,8 @@
 #include "src/core/lib/iomgr/executor.h"
 #include "src/core/lib/iomgr/iomgr.h"
 #include "src/core/lib/slice/slice_internal.h"
-#include "src/core/lib/support/stack_lockfree.h"
+#include "src/core/lib/support/mpscq.h"
+#include "src/core/lib/support/spinlock.h"
 #include "src/core/lib/support/string.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/call.h"
@@ -76,6 +77,7 @@
 grpc_tracer_flag grpc_server_channel_trace = GRPC_TRACER_INITIALIZER(false);
 
 typedef struct requested_call {
+  gpr_mpscq_node request_link; /* must be first */
   requested_call_type type;
   size_t cq_idx;
   void *tag;
@@ -175,7 +177,7 @@
   grpc_server *server;
   call_data *pending_head;
   call_data *pending_tail;
-  gpr_stack_lockfree **requests_per_cq;
+  gpr_locked_mpscq *requests_per_cq;
 };
 
 struct registered_method {
@@ -220,11 +222,6 @@
   registered_method *registered_methods;
   /** one request matcher for unregistered methods */
   request_matcher unregistered_request_matcher;
-  /** free list of available requested_calls_per_cq indices */
-  gpr_stack_lockfree **request_freelist_per_cq;
-  /** requested call backing data */
-  requested_call **requested_calls_per_cq;
-  int max_requested_calls_per_cq;
 
   gpr_atm shutdown_flag;
   uint8_t shutdown_published;
@@ -324,21 +321,20 @@
  * request_matcher
  */
 
-static void request_matcher_init(request_matcher *rm, size_t entries,
-                                 grpc_server *server) {
+static void request_matcher_init(request_matcher *rm, grpc_server *server) {
   memset(rm, 0, sizeof(*rm));
   rm->server = server;
   rm->requests_per_cq =
       gpr_malloc(sizeof(*rm->requests_per_cq) * server->cq_count);
   for (size_t i = 0; i < server->cq_count; i++) {
-    rm->requests_per_cq[i] = gpr_stack_lockfree_create(entries);
+    gpr_locked_mpscq_init(&rm->requests_per_cq[i]);
   }
 }
 
 static void request_matcher_destroy(request_matcher *rm) {
   for (size_t i = 0; i < rm->server->cq_count; i++) {
-    GPR_ASSERT(gpr_stack_lockfree_pop(rm->requests_per_cq[i]) == -1);
-    gpr_stack_lockfree_destroy(rm->requests_per_cq[i]);
+    GPR_ASSERT(gpr_locked_mpscq_pop(&rm->requests_per_cq[i]) == NULL);
+    gpr_locked_mpscq_destroy(&rm->requests_per_cq[i]);
   }
   gpr_free(rm->requests_per_cq);
 }
@@ -368,13 +364,17 @@
                                           grpc_server *server,
                                           request_matcher *rm,
                                           grpc_error *error) {
-  int request_id;
+  requested_call *rc;
   for (size_t i = 0; i < server->cq_count; i++) {
-    while ((request_id = gpr_stack_lockfree_pop(rm->requests_per_cq[i])) !=
-           -1) {
-      fail_call(exec_ctx, server, i,
-                &server->requested_calls_per_cq[i][request_id],
-                GRPC_ERROR_REF(error));
+    /* Here we know:
+       1. no requests are being added (since the server is shut down)
+       2. no other threads are pulling (since the shut down process is single
+          threaded)
+       So, we can ignore the queue lock and just pop, with the guarantee that a
+       NULL returned here truly means that the queue is empty */
+    while ((rc = (requested_call *)gpr_mpscq_pop(
+                &rm->requests_per_cq[i].queue)) != NULL) {
+      fail_call(exec_ctx, server, i, rc, GRPC_ERROR_REF(error));
     }
   }
   GRPC_ERROR_UNREF(error);
@@ -409,13 +409,7 @@
   }
   for (i = 0; i < server->cq_count; i++) {
     GRPC_CQ_INTERNAL_UNREF(exec_ctx, server->cqs[i], "server");
-    if (server->started) {
-      gpr_stack_lockfree_destroy(server->request_freelist_per_cq[i]);
-      gpr_free(server->requested_calls_per_cq[i]);
-    }
   }
-  gpr_free(server->request_freelist_per_cq);
-  gpr_free(server->requested_calls_per_cq);
   gpr_free(server->cqs);
   gpr_free(server->pollsets);
   gpr_free(server->shutdown_tags);
@@ -473,21 +467,7 @@
 
 static void done_request_event(grpc_exec_ctx *exec_ctx, void *req,
                                grpc_cq_completion *c) {
-  requested_call *rc = req;
-  grpc_server *server = rc->server;
-
-  if (rc >= server->requested_calls_per_cq[rc->cq_idx] &&
-      rc < server->requested_calls_per_cq[rc->cq_idx] +
-               server->max_requested_calls_per_cq) {
-    GPR_ASSERT(rc - server->requested_calls_per_cq[rc->cq_idx] <= INT_MAX);
-    gpr_stack_lockfree_push(
-        server->request_freelist_per_cq[rc->cq_idx],
-        (int)(rc - server->requested_calls_per_cq[rc->cq_idx]));
-  } else {
-    gpr_free(req);
-  }
-
-  server_unref(exec_ctx, server);
+  gpr_free(req);
 }
 
 static void publish_call(grpc_exec_ctx *exec_ctx, grpc_server *server,
@@ -516,10 +496,6 @@
       GPR_UNREACHABLE_CODE(return );
   }
 
-  grpc_call_element *elem =
-      grpc_call_stack_element(grpc_call_get_call_stack(call), 0);
-  channel_data *chand = elem->channel_data;
-  server_ref(chand->server);
   grpc_cq_end_op(exec_ctx, calld->cq_new, rc->tag, GRPC_ERROR_NONE,
                  done_request_event, rc, &rc->completion);
 }
@@ -547,15 +523,15 @@
 
   for (size_t i = 0; i < server->cq_count; i++) {
     size_t cq_idx = (chand->cq_idx + i) % server->cq_count;
-    int request_id = gpr_stack_lockfree_pop(rm->requests_per_cq[cq_idx]);
-    if (request_id == -1) {
+    requested_call *rc =
+        (requested_call *)gpr_locked_mpscq_pop(&rm->requests_per_cq[cq_idx]);
+    if (rc == NULL) {
       continue;
     } else {
       gpr_mu_lock(&calld->mu_state);
       calld->state = ACTIVATED;
       gpr_mu_unlock(&calld->mu_state);
-      publish_call(exec_ctx, server, calld, cq_idx,
-                   &server->requested_calls_per_cq[cq_idx][request_id]);
+      publish_call(exec_ctx, server, calld, cq_idx, rc);
       return; /* early out */
     }
   }
@@ -1029,8 +1005,6 @@
   server->root_channel_data.next = server->root_channel_data.prev =
       &server->root_channel_data;
 
-  /* TODO(ctiller): expose a channel_arg for this */
-  server->max_requested_calls_per_cq = 32768;
   server->channel_args = grpc_channel_args_copy(args);
 
   return server;
@@ -1103,29 +1077,15 @@
   server->started = true;
   server->pollset_count = 0;
   server->pollsets = gpr_malloc(sizeof(grpc_pollset *) * server->cq_count);
-  server->request_freelist_per_cq =
-      gpr_malloc(sizeof(*server->request_freelist_per_cq) * server->cq_count);
-  server->requested_calls_per_cq =
-      gpr_malloc(sizeof(*server->requested_calls_per_cq) * server->cq_count);
   for (i = 0; i < server->cq_count; i++) {
     if (grpc_cq_can_listen(server->cqs[i])) {
       server->pollsets[server->pollset_count++] =
           grpc_cq_pollset(server->cqs[i]);
     }
-    server->request_freelist_per_cq[i] =
-        gpr_stack_lockfree_create((size_t)server->max_requested_calls_per_cq);
-    for (int j = 0; j < server->max_requested_calls_per_cq; j++) {
-      gpr_stack_lockfree_push(server->request_freelist_per_cq[i], j);
-    }
-    server->requested_calls_per_cq[i] =
-        gpr_malloc((size_t)server->max_requested_calls_per_cq *
-                   sizeof(*server->requested_calls_per_cq[i]));
   }
-  request_matcher_init(&server->unregistered_request_matcher,
-                       (size_t)server->max_requested_calls_per_cq, server);
+  request_matcher_init(&server->unregistered_request_matcher, server);
   for (registered_method *rm = server->registered_methods; rm; rm = rm->next) {
-    request_matcher_init(&rm->request_matcher,
-                         (size_t)server->max_requested_calls_per_cq, server);
+    request_matcher_init(&rm->request_matcher, server);
   }
 
   server_ref(server);
@@ -1379,21 +1339,11 @@
                                           requested_call *rc) {
   call_data *calld = NULL;
   request_matcher *rm = NULL;
-  int request_id;
   if (gpr_atm_acq_load(&server->shutdown_flag)) {
     fail_call(exec_ctx, server, cq_idx, rc,
               GRPC_ERROR_CREATE_FROM_STATIC_STRING("Server Shutdown"));
     return GRPC_CALL_OK;
   }
-  request_id = gpr_stack_lockfree_pop(server->request_freelist_per_cq[cq_idx]);
-  if (request_id == -1) {
-    /* out of request ids: just fail this one */
-    fail_call(exec_ctx, server, cq_idx, rc,
-              grpc_error_set_int(
-                  GRPC_ERROR_CREATE_FROM_STATIC_STRING("Out of request ids"),
-                  GRPC_ERROR_INT_LIMIT, server->max_requested_calls_per_cq));
-    return GRPC_CALL_OK;
-  }
   switch (rc->type) {
     case BATCH_CALL:
       rm = &server->unregistered_request_matcher;
@@ -1402,15 +1352,13 @@
       rm = &rc->data.registered.registered_method->request_matcher;
       break;
   }
-  server->requested_calls_per_cq[cq_idx][request_id] = *rc;
-  gpr_free(rc);
-  if (gpr_stack_lockfree_push(rm->requests_per_cq[cq_idx], request_id)) {
+  if (gpr_locked_mpscq_push(&rm->requests_per_cq[cq_idx], &rc->request_link)) {
     /* this was the first queued request: we need to lock and start
        matching calls */
     gpr_mu_lock(&server->mu_call);
     while ((calld = rm->pending_head) != NULL) {
-      request_id = gpr_stack_lockfree_pop(rm->requests_per_cq[cq_idx]);
-      if (request_id == -1) break;
+      rc = (requested_call *)gpr_locked_mpscq_pop(&rm->requests_per_cq[cq_idx]);
+      if (rc == NULL) break;
       rm->pending_head = calld->pending_next;
       gpr_mu_unlock(&server->mu_call);
       gpr_mu_lock(&calld->mu_state);
@@ -1426,8 +1374,7 @@
         GPR_ASSERT(calld->state == PENDING);
         calld->state = ACTIVATED;
         gpr_mu_unlock(&calld->mu_state);
-        publish_call(exec_ctx, server, calld, cq_idx,
-                     &server->requested_calls_per_cq[cq_idx][request_id]);
+        publish_call(exec_ctx, server, calld, cq_idx, rc);
       }
       gpr_mu_lock(&server->mu_call);
     }
@@ -1534,7 +1481,6 @@
   rc->initial_metadata->count = 0;
   GPR_ASSERT(error != GRPC_ERROR_NONE);
 
-  server_ref(server);
   grpc_cq_end_op(exec_ctx, server->cqs[cq_idx], rc->tag, error,
                  done_request_event, rc, &rc->completion);
 }
diff --git a/src/core/plugin_registry/grpc_plugin_registry.c b/src/core/plugin_registry/grpc_plugin_registry.c
index 25bda7a..510cf5d 100644
--- a/src/core/plugin_registry/grpc_plugin_registry.c
+++ b/src/core/plugin_registry/grpc_plugin_registry.c
@@ -61,6 +61,8 @@
 extern void grpc_max_age_filter_shutdown(void);
 extern void grpc_message_size_filter_init(void);
 extern void grpc_message_size_filter_shutdown(void);
+extern void grpc_workaround_cronet_compression_filter_init(void);
+extern void grpc_workaround_cronet_compression_filter_shutdown(void);
 
 void grpc_register_built_in_plugins(void) {
   grpc_register_plugin(grpc_http_filters_init,
@@ -91,4 +93,6 @@
                        grpc_max_age_filter_shutdown);
   grpc_register_plugin(grpc_message_size_filter_init,
                        grpc_message_size_filter_shutdown);
+  grpc_register_plugin(grpc_workaround_cronet_compression_filter_init,
+                       grpc_workaround_cronet_compression_filter_shutdown);
 }
diff --git a/src/core/plugin_registry/grpc_unsecure_plugin_registry.c b/src/core/plugin_registry/grpc_unsecure_plugin_registry.c
index 05d4771..e5eb68f 100644
--- a/src/core/plugin_registry/grpc_unsecure_plugin_registry.c
+++ b/src/core/plugin_registry/grpc_unsecure_plugin_registry.c
@@ -61,6 +61,8 @@
 extern void grpc_max_age_filter_shutdown(void);
 extern void grpc_message_size_filter_init(void);
 extern void grpc_message_size_filter_shutdown(void);
+extern void grpc_workaround_cronet_compression_filter_init(void);
+extern void grpc_workaround_cronet_compression_filter_shutdown(void);
 
 void grpc_register_built_in_plugins(void) {
   grpc_register_plugin(grpc_http_filters_init,
@@ -91,4 +93,6 @@
                        grpc_max_age_filter_shutdown);
   grpc_register_plugin(grpc_message_size_filter_init,
                        grpc_message_size_filter_shutdown);
+  grpc_register_plugin(grpc_workaround_cronet_compression_filter_init,
+                       grpc_workaround_cronet_compression_filter_shutdown);
 }
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 2ead048..6dca6a6 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -358,4 +358,14 @@
   (*g_plugin_factory_list).push_back(CreatePlugin);
 }
 
+ServerBuilder& ServerBuilder::EnableWorkaround(grpc_workaround_list id) {
+  switch (id) {
+    case GRPC_WORKAROUND_ID_CRONET_COMPRESSION:
+      return AddChannelArgument(GRPC_ARG_WORKAROUND_CRONET_COMPRESSION, 1);
+    default:
+      gpr_log(GPR_ERROR, "Workaround %u does not exist or is obsolete.", id);
+      return *this;
+  }
+}
+
 }  // namespace grpc
diff --git a/src/cpp/server/server_cc.cc b/src/cpp/server/server_cc.cc
index 2f89aa3..7c93bb8 100644
--- a/src/cpp/server/server_cc.cc
+++ b/src/cpp/server/server_cc.cc
@@ -686,6 +686,7 @@
         StringFromCopiedSlice(call_details_.method);
     static_cast<GenericServerContext*>(context_)->host_ =
         StringFromCopiedSlice(call_details_.host);
+    context_->deadline_ = call_details_.deadline;
   }
   grpc_slice_unref(call_details_.method);
   grpc_slice_unref(call_details_.host);
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index 7e0f3f0..c086500 100755
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -19,27 +19,27 @@
 
   <ItemGroup>
     <EmbeddedResource Include="..\..\..\etc\roots.pem" />
-    <Content Include="..\nativelibs\macosx_x64\libgrpc_csharp_ext.dylib">
+    <Content Include="..\nativelibs\csharp_ext_macos_x64\libgrpc_csharp_ext.dylib">
       <PackagePath>runtimes/osx/native/libgrpc_csharp_ext.x64.dylib</PackagePath>
       <Pack>true</Pack>
     </Content>
-    <Content Include="..\nativelibs\macosx_x86\libgrpc_csharp_ext.dylib">
+    <Content Include="..\nativelibs\csharp_ext_macos_x86\libgrpc_csharp_ext.dylib">
       <PackagePath>runtimes/osx/native/libgrpc_csharp_ext.x86.dylib</PackagePath>
       <Pack>true</Pack>
     </Content>
-    <Content Include="..\nativelibs\linux_x64\libgrpc_csharp_ext.so">
+    <Content Include="..\nativelibs\csharp_ext_linux_x64\libgrpc_csharp_ext.so">
       <PackagePath>runtimes/linux/native/libgrpc_csharp_ext.x64.so</PackagePath>
       <Pack>true</Pack>
     </Content>
-    <Content Include="..\nativelibs\linux_x86\libgrpc_csharp_ext.so">
+    <Content Include="..\nativelibs\csharp_ext_linux_x86\libgrpc_csharp_ext.so">
       <PackagePath>runtimes/linux/native/libgrpc_csharp_ext.x86.so</PackagePath>
       <Pack>true</Pack>
     </Content>
-    <Content Include="..\nativelibs\windows_x64\grpc_csharp_ext.dll">
+    <Content Include="..\nativelibs\csharp_ext_windows_x64\grpc_csharp_ext.dll">
       <PackagePath>runtimes/win/native/grpc_csharp_ext.x64.dll</PackagePath>
       <Pack>true</Pack>
     </Content>
-    <Content Include="..\nativelibs\windows_x86\grpc_csharp_ext.dll">
+    <Content Include="..\nativelibs\csharp_ext_windows_x86\grpc_csharp_ext.dll">
       <PackagePath>runtimes/win/native/grpc_csharp_ext.x86.dll</PackagePath>
       <Pack>true</Pack>
     </Content>
diff --git a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
index 3c368fb..8ed0c0b 100644
--- a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
@@ -117,7 +117,7 @@
             {
                 var ctx = BatchContextSafeHandle.Create();
                 completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, (success, context) => callback(success));
-                Native.grpcsharp_call_send_message(this, ctx, payload, new UIntPtr((ulong)payload.Length), writeFlags, sendEmptyInitialMetadata).CheckOk();
+                Native.grpcsharp_call_send_message(this, ctx, payload, new UIntPtr((ulong)payload.Length), writeFlags, sendEmptyInitialMetadata ? 1 : 0).CheckOk();
             }
         }
 
@@ -140,7 +140,7 @@
                 var optionalPayloadLength = optionalPayload != null ? new UIntPtr((ulong)optionalPayload.Length) : UIntPtr.Zero;
                 completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, (success, context) => callback(success));
                 var statusDetailBytes = MarshalUtils.GetBytesUTF8(status.Detail);
-                Native.grpcsharp_call_send_status_from_server(this, ctx, status.StatusCode, statusDetailBytes, new UIntPtr((ulong)statusDetailBytes.Length), metadataArray, sendEmptyInitialMetadata,
+                Native.grpcsharp_call_send_status_from_server(this, ctx, status.StatusCode, statusDetailBytes, new UIntPtr((ulong)statusDetailBytes.Length), metadataArray, sendEmptyInitialMetadata ? 1 : 0,
                     optionalPayload, optionalPayloadLength, writeFlags).CheckOk();
             }
         }
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index a98861a..696987d 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -346,11 +346,11 @@
             public delegate CallError grpcsharp_call_start_duplex_streaming_delegate(CallSafeHandle call,
                 BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray, CallFlags metadataFlags);
             public delegate CallError grpcsharp_call_send_message_delegate(CallSafeHandle call,
-                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen, WriteFlags writeFlags, bool sendEmptyInitialMetadata);
+                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen, WriteFlags writeFlags, int sendEmptyInitialMetadata);
             public delegate CallError grpcsharp_call_send_close_from_client_delegate(CallSafeHandle call,
                 BatchContextSafeHandle ctx);
             public delegate CallError grpcsharp_call_send_status_from_server_delegate(CallSafeHandle call,
-                BatchContextSafeHandle ctx, StatusCode statusCode, byte[] statusMessage, UIntPtr statusMessageLen, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata,
+                BatchContextSafeHandle ctx, StatusCode statusCode, byte[] statusMessage, UIntPtr statusMessageLen, MetadataArraySafeHandle metadataArray, int sendEmptyInitialMetadata,
                 byte[] optionalSendBuffer, UIntPtr optionalSendBufferLen, WriteFlags writeFlags);
             public delegate CallError grpcsharp_call_recv_message_delegate(CallSafeHandle call,
                 BatchContextSafeHandle ctx);
@@ -406,7 +406,7 @@
             public delegate CallCredentialsSafeHandle grpcsharp_metadata_credentials_create_from_plugin_delegate(NativeMetadataInterceptor interceptor);
             public delegate void grpcsharp_metadata_credentials_notify_from_plugin_delegate(IntPtr callbackPtr, IntPtr userData, MetadataArraySafeHandle metadataArray, StatusCode statusCode, string errorDetails);
 
-            public delegate ServerCredentialsSafeHandle grpcsharp_ssl_server_credentials_create_delegate(string pemRootCerts, string[] keyCertPairCertChainArray, string[] keyCertPairPrivateKeyArray, UIntPtr numKeyCertPairs, bool forceClientAuth);
+            public delegate ServerCredentialsSafeHandle grpcsharp_ssl_server_credentials_create_delegate(string pemRootCerts, string[] keyCertPairCertChainArray, string[] keyCertPairPrivateKeyArray, UIntPtr numKeyCertPairs, int forceClientAuth);
             public delegate void grpcsharp_server_credentials_release_delegate(IntPtr credentials);
 
             public delegate ServerSafeHandle grpcsharp_server_create_delegate(ChannelArgsSafeHandle args);
diff --git a/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
index 24f686f..c14fa7c 100644
--- a/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
@@ -53,7 +53,7 @@
             return Native.grpcsharp_ssl_server_credentials_create(pemRootCerts,
                                                                   keyCertPairCertChainArray, keyCertPairPrivateKeyArray,
                                                                   new UIntPtr((ulong)keyCertPairCertChainArray.Length),
-                                                                  forceClientAuth);
+                                                                  forceClientAuth ? 1 : 0);
         }
 
         protected override bool ReleaseHandle()
diff --git a/src/csharp/Grpc.Core/Version.csproj.include b/src/csharp/Grpc.Core/Version.csproj.include
index 6af2af1..8388bfd 100755
--- a/src/csharp/Grpc.Core/Version.csproj.include
+++ b/src/csharp/Grpc.Core/Version.csproj.include
@@ -2,6 +2,6 @@
 <Project>
   <PropertyGroup>
     <GrpcCsharpVersion>1.4.0-dev</GrpcCsharpVersion>
-    <GoogleProtobufVersion>3.2.0</GoogleProtobufVersion>
+    <GoogleProtobufVersion>3.3.0</GoogleProtobufVersion>
   </PropertyGroup>
 </Project>
diff --git a/src/csharp/Grpc.Tools.nuspec b/src/csharp/Grpc.Tools.nuspec
index ba4e1d6..0cae5572 100644
--- a/src/csharp/Grpc.Tools.nuspec
+++ b/src/csharp/Grpc.Tools.nuspec
@@ -17,17 +17,17 @@
   </metadata>
   <files>
     <!-- forward slashes in src path enable building on Linux -->
-    <file src="protoc_plugins/windows_x86/protoc.exe" target="tools/windows_x86/protoc.exe" />
-    <file src="protoc_plugins/windows_x86/grpc_csharp_plugin.exe" target="tools/windows_x86/grpc_csharp_plugin.exe" />
-    <file src="protoc_plugins/windows_x64/protoc.exe" target="tools/windows_x64/protoc.exe" />
-    <file src="protoc_plugins/windows_x64/grpc_csharp_plugin.exe" target="tools/windows_x64/grpc_csharp_plugin.exe" />
-    <file src="protoc_plugins/linux_x86/protoc" target="tools/linux_x86/protoc" />
-    <file src="protoc_plugins/linux_x86/grpc_csharp_plugin" target="tools/linux_x86/grpc_csharp_plugin" />
-    <file src="protoc_plugins/linux_x64/protoc" target="tools/linux_x64/protoc" />
-    <file src="protoc_plugins/linux_x64/grpc_csharp_plugin" target="tools/linux_x64/grpc_csharp_plugin" />
-    <file src="protoc_plugins/macosx_x86/protoc" target="tools/macosx_x86/protoc" />
-    <file src="protoc_plugins/macosx_x86/grpc_csharp_plugin" target="tools/macosx_x86/grpc_csharp_plugin" />
-    <file src="protoc_plugins/macosx_x64/protoc" target="tools/macosx_x64/protoc" />
-    <file src="protoc_plugins/macosx_x64/grpc_csharp_plugin" target="tools/macosx_x64/grpc_csharp_plugin" />
+    <file src="protoc_plugins/protoc_windows_x86/protoc.exe" target="tools/windows_x86/protoc.exe" />
+    <file src="protoc_plugins/protoc_windows_x86/grpc_csharp_plugin.exe" target="tools/windows_x86/grpc_csharp_plugin.exe" />
+    <file src="protoc_plugins/protoc_windows_x64/protoc.exe" target="tools/windows_x64/protoc.exe" />
+    <file src="protoc_plugins/protoc_windows_x64/grpc_csharp_plugin.exe" target="tools/windows_x64/grpc_csharp_plugin.exe" />
+    <file src="protoc_plugins/protoc_linux_x86/protoc" target="tools/linux_x86/protoc" />
+    <file src="protoc_plugins/protoc_linux_x86/grpc_csharp_plugin" target="tools/linux_x86/grpc_csharp_plugin" />
+    <file src="protoc_plugins/protoc_linux_x64/protoc" target="tools/linux_x64/protoc" />
+    <file src="protoc_plugins/protoc_linux_x64/grpc_csharp_plugin" target="tools/linux_x64/grpc_csharp_plugin" />
+    <file src="protoc_plugins/protoc_macos_x86/protoc" target="tools/macosx_x86/protoc" />
+    <file src="protoc_plugins/protoc_macos_x86/grpc_csharp_plugin" target="tools/macosx_x86/grpc_csharp_plugin" />
+    <file src="protoc_plugins/protoc_macos_x64/protoc" target="tools/macosx_x64/protoc" />
+    <file src="protoc_plugins/protoc_macos_x64/grpc_csharp_plugin" target="tools/macosx_x64/grpc_csharp_plugin" />
   </files>
 </package>
diff --git a/src/csharp/build_packages_dotnetcli.bat b/src/csharp/build_packages_dotnetcli.bat
index 673642e..d823942 100755
--- a/src/csharp/build_packages_dotnetcli.bat
+++ b/src/csharp/build_packages_dotnetcli.bat
@@ -36,35 +36,26 @@
 
 set -ex
 
-mkdir -p ..\..\artifacts\
+mkdir ..\..\artifacts
 
 @rem Collect the artifacts built by the previous build step if running on Jenkins
-@rem TODO(jtattermusch): is there a better way to do this?
-xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=windows\artifacts\* nativelibs\windows_x86\
-xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=windows\artifacts\* nativelibs\windows_x64\
-xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=linux\artifacts\* nativelibs\linux_x86\
-xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=linux\artifacts\* nativelibs\linux_x64\
-xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=macos\artifacts\* nativelibs\macosx_x86\
-xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=macos\artifacts\* nativelibs\macosx_x64\
+mkdir nativelibs
+powershell -Command "cp -r ..\..\platform=*\artifacts\csharp_ext_* nativelibs"
 
 @rem Collect protoc artifacts built by the previous build step
-xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=windows\artifacts\* protoc_plugins\windows_x86\
-xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=windows\artifacts\* protoc_plugins\windows_x64\
-xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=linux\artifacts\* protoc_plugins\linux_x86\
-xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=linux\artifacts\* protoc_plugins\linux_x64\
-xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=macos\artifacts\* protoc_plugins\macosx_x86\
-xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=macos\artifacts\* protoc_plugins\macosx_x64\
+mkdir protoc_plugins
+powershell -Command "cp -r ..\..\platform=*\artifacts\protoc_* protoc_plugins"
 
 %DOTNET% restore Grpc.sln || goto :error
 
 @rem To be able to build, we also need to put grpc_csharp_ext to its normal location
-xcopy /Y /I nativelibs\windows_x64\grpc_csharp_ext.dll ..\..\cmake\build\x64\Release\
+xcopy /Y /I nativelibs\csharp_ext_windows_x64\grpc_csharp_ext.dll ..\..\cmake\build\x64\Release\
 
-%DOTNET% pack --configuration Release Grpc.Core --output ..\..\..\artifacts || goto :error
-%DOTNET% pack --configuration Release Grpc.Core.Testing --output ..\..\..\artifacts || goto :error
-%DOTNET% pack --configuration Release Grpc.Auth --output ..\..\..\artifacts || goto :error
-%DOTNET% pack --configuration Release Grpc.HealthCheck --output ..\..\..\artifacts || goto :error
-%DOTNET% pack --configuration Release Grpc.Reflection --output ..\..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.Core --output ..\..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.Core.Testing --output ..\..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.Auth --output ..\..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.HealthCheck --output ..\..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.Reflection --output ..\..\..\artifacts || goto :error
 
 %NUGET% pack Grpc.nuspec -Version %VERSION% -OutputDirectory ..\..\artifacts || goto :error
 %NUGET% pack Grpc.Tools.nuspec -Version %VERSION% -OutputDirectory ..\..\artifacts
diff --git a/src/csharp/build_packages_dotnetcli.sh b/src/csharp/build_packages_dotnetcli.sh
index ee923e3..f79c97f 100755
--- a/src/csharp/build_packages_dotnetcli.sh
+++ b/src/csharp/build_packages_dotnetcli.sh
@@ -34,41 +34,25 @@
 
 mkdir -p ../../artifacts/
 
-mkdir -p nativelibs/windows_x86 nativelibs/windows_x64 \
-    nativelibs/linux_x86 nativelibs/linux_x64 \
-    nativelibs/macosx_x86 nativelibs/macosx_x64
-
-mkdir -p protoc_plugins/windows_x86 protoc_plugins/windows_x64 \
-    protoc_plugins/linux_x86 protoc_plugins/linux_x64 \
-    protoc_plugins/macosx_x86 protoc_plugins/macosx_x64
-
-# Collect the artifacts built by the previous build step if running on Jenkins
-cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=windows/artifacts/* nativelibs/windows_x86 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=windows/artifacts/* nativelibs/windows_x64 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=linux/artifacts/* nativelibs/linux_x86 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=linux/artifacts/* nativelibs/linux_x64 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=macos/artifacts/* nativelibs/macosx_x86 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=macos/artifacts/* nativelibs/macosx_x64 || true
+# Collect the artifacts built by the previous build step
+mkdir -p nativelibs
+cp -r $EXTERNAL_GIT_ROOT/platform={windows,linux,macos}/artifacts/csharp_ext_* nativelibs || true
 
 # Collect protoc artifacts built by the previous build step
-cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=windows/artifacts/* protoc_plugins/windows_x86 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=windows/artifacts/* protoc_plugins/windows_x64 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=linux/artifacts/* protoc_plugins/linux_x86 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=linux/artifacts/* protoc_plugins/linux_x64 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=macos/artifacts/* protoc_plugins/macosx_x86 || true
-cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=macos/artifacts/* protoc_plugins/macosx_x64 || true
+mkdir -p protoc_plugins
+cp -r $EXTERNAL_GIT_ROOT/platform={windows,linux,macos}/artifacts/protoc_* protoc_plugins || true
 
 dotnet restore Grpc.sln
 
 # To be able to build, we also need to put grpc_csharp_ext to its normal location
 mkdir -p ../../libs/opt
-cp nativelibs/linux_x64/libgrpc_csharp_ext.so ../../libs/opt
+cp nativelibs/csharp_ext_linux_x64/libgrpc_csharp_ext.so ../../libs/opt
 
-dotnet pack --configuration Release Grpc.Core --output ../../../artifacts
-dotnet pack --configuration Release Grpc.Core.Testing --output ../../../artifacts
-dotnet pack --configuration Release Grpc.Auth --output ../../../artifacts
-dotnet pack --configuration Release Grpc.HealthCheck --output ../../../artifacts
-dotnet pack --configuration Release Grpc.Reflection --output ../../../artifacts
+dotnet pack --configuration Release --include-symbols --include-source Grpc.Core --output ../../../artifacts
+dotnet pack --configuration Release --include-symbols --include-source Grpc.Core.Testing --output ../../../artifacts
+dotnet pack --configuration Release --include-symbols --include-source Grpc.Auth --output ../../../artifacts
+dotnet pack --configuration Release --include-symbols --include-source Grpc.HealthCheck --output ../../../artifacts
+dotnet pack --configuration Release --include-symbols --include-source Grpc.Reflection --output ../../../artifacts
 
 nuget pack Grpc.nuspec -Version "1.4.0-dev" -OutputDirectory ../../artifacts
 nuget pack Grpc.Tools.nuspec -Version "1.4.0-dev" -OutputDirectory ../../artifacts
diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index e193e82..c444ad0 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.cc
@@ -85,98 +85,6 @@
 
 static char *pem_root_certs = NULL;
 
-void InitStatusConstants(Local<Object> exports) {
-  Nan::HandleScope scope;
-  Local<Object> status = Nan::New<Object>();
-  Nan::Set(exports, Nan::New("status").ToLocalChecked(), status);
-  Local<Value> OK(Nan::New<Uint32, uint32_t>(GRPC_STATUS_OK));
-  Nan::Set(status, Nan::New("OK").ToLocalChecked(), OK);
-  Local<Value> CANCELLED(Nan::New<Uint32, uint32_t>(GRPC_STATUS_CANCELLED));
-  Nan::Set(status, Nan::New("CANCELLED").ToLocalChecked(), CANCELLED);
-  Local<Value> UNKNOWN(Nan::New<Uint32, uint32_t>(GRPC_STATUS_UNKNOWN));
-  Nan::Set(status, Nan::New("UNKNOWN").ToLocalChecked(), UNKNOWN);
-  Local<Value> INVALID_ARGUMENT(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_INVALID_ARGUMENT));
-  Nan::Set(status, Nan::New("INVALID_ARGUMENT").ToLocalChecked(),
-           INVALID_ARGUMENT);
-  Local<Value> DEADLINE_EXCEEDED(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_DEADLINE_EXCEEDED));
-  Nan::Set(status, Nan::New("DEADLINE_EXCEEDED").ToLocalChecked(),
-           DEADLINE_EXCEEDED);
-  Local<Value> NOT_FOUND(Nan::New<Uint32, uint32_t>(GRPC_STATUS_NOT_FOUND));
-  Nan::Set(status, Nan::New("NOT_FOUND").ToLocalChecked(), NOT_FOUND);
-  Local<Value> ALREADY_EXISTS(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_ALREADY_EXISTS));
-  Nan::Set(status, Nan::New("ALREADY_EXISTS").ToLocalChecked(), ALREADY_EXISTS);
-  Local<Value> PERMISSION_DENIED(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_PERMISSION_DENIED));
-  Nan::Set(status, Nan::New("PERMISSION_DENIED").ToLocalChecked(),
-           PERMISSION_DENIED);
-  Local<Value> UNAUTHENTICATED(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_UNAUTHENTICATED));
-  Nan::Set(status, Nan::New("UNAUTHENTICATED").ToLocalChecked(),
-           UNAUTHENTICATED);
-  Local<Value> RESOURCE_EXHAUSTED(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_RESOURCE_EXHAUSTED));
-  Nan::Set(status, Nan::New("RESOURCE_EXHAUSTED").ToLocalChecked(),
-           RESOURCE_EXHAUSTED);
-  Local<Value> FAILED_PRECONDITION(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_FAILED_PRECONDITION));
-  Nan::Set(status, Nan::New("FAILED_PRECONDITION").ToLocalChecked(),
-           FAILED_PRECONDITION);
-  Local<Value> ABORTED(Nan::New<Uint32, uint32_t>(GRPC_STATUS_ABORTED));
-  Nan::Set(status, Nan::New("ABORTED").ToLocalChecked(), ABORTED);
-  Local<Value> OUT_OF_RANGE(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_OUT_OF_RANGE));
-  Nan::Set(status, Nan::New("OUT_OF_RANGE").ToLocalChecked(), OUT_OF_RANGE);
-  Local<Value> UNIMPLEMENTED(
-      Nan::New<Uint32, uint32_t>(GRPC_STATUS_UNIMPLEMENTED));
-  Nan::Set(status, Nan::New("UNIMPLEMENTED").ToLocalChecked(), UNIMPLEMENTED);
-  Local<Value> INTERNAL(Nan::New<Uint32, uint32_t>(GRPC_STATUS_INTERNAL));
-  Nan::Set(status, Nan::New("INTERNAL").ToLocalChecked(), INTERNAL);
-  Local<Value> UNAVAILABLE(Nan::New<Uint32, uint32_t>(GRPC_STATUS_UNAVAILABLE));
-  Nan::Set(status, Nan::New("UNAVAILABLE").ToLocalChecked(), UNAVAILABLE);
-  Local<Value> DATA_LOSS(Nan::New<Uint32, uint32_t>(GRPC_STATUS_DATA_LOSS));
-  Nan::Set(status, Nan::New("DATA_LOSS").ToLocalChecked(), DATA_LOSS);
-}
-
-void InitCallErrorConstants(Local<Object> exports) {
-  Nan::HandleScope scope;
-  Local<Object> call_error = Nan::New<Object>();
-  Nan::Set(exports, Nan::New("callError").ToLocalChecked(), call_error);
-  Local<Value> OK(Nan::New<Uint32, uint32_t>(GRPC_CALL_OK));
-  Nan::Set(call_error, Nan::New("OK").ToLocalChecked(), OK);
-  Local<Value> CALL_ERROR(Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR));
-  Nan::Set(call_error, Nan::New("ERROR").ToLocalChecked(), CALL_ERROR);
-  Local<Value> NOT_ON_SERVER(
-      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_ON_SERVER));
-  Nan::Set(call_error, Nan::New("NOT_ON_SERVER").ToLocalChecked(),
-           NOT_ON_SERVER);
-  Local<Value> NOT_ON_CLIENT(
-      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_ON_CLIENT));
-  Nan::Set(call_error, Nan::New("NOT_ON_CLIENT").ToLocalChecked(),
-           NOT_ON_CLIENT);
-  Local<Value> ALREADY_INVOKED(
-      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_ALREADY_INVOKED));
-  Nan::Set(call_error, Nan::New("ALREADY_INVOKED").ToLocalChecked(),
-           ALREADY_INVOKED);
-  Local<Value> NOT_INVOKED(
-      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_INVOKED));
-  Nan::Set(call_error, Nan::New("NOT_INVOKED").ToLocalChecked(), NOT_INVOKED);
-  Local<Value> ALREADY_FINISHED(
-      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_ALREADY_FINISHED));
-  Nan::Set(call_error, Nan::New("ALREADY_FINISHED").ToLocalChecked(),
-           ALREADY_FINISHED);
-  Local<Value> TOO_MANY_OPERATIONS(
-      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS));
-  Nan::Set(call_error, Nan::New("TOO_MANY_OPERATIONS").ToLocalChecked(),
-           TOO_MANY_OPERATIONS);
-  Local<Value> INVALID_FLAGS(
-      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_INVALID_FLAGS));
-  Nan::Set(call_error, Nan::New("INVALID_FLAGS").ToLocalChecked(),
-           INVALID_FLAGS);
-}
-
 void InitOpTypeConstants(Local<Object> exports) {
   Nan::HandleScope scope;
   Local<Object> op_type = Nan::New<Object>();
@@ -211,27 +119,6 @@
            RECV_CLOSE_ON_SERVER);
 }
 
-void InitPropagateConstants(Local<Object> exports) {
-  Nan::HandleScope scope;
-  Local<Object> propagate = Nan::New<Object>();
-  Nan::Set(exports, Nan::New("propagate").ToLocalChecked(), propagate);
-  Local<Value> DEADLINE(Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_DEADLINE));
-  Nan::Set(propagate, Nan::New("DEADLINE").ToLocalChecked(), DEADLINE);
-  Local<Value> CENSUS_STATS_CONTEXT(
-      Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_CENSUS_STATS_CONTEXT));
-  Nan::Set(propagate, Nan::New("CENSUS_STATS_CONTEXT").ToLocalChecked(),
-           CENSUS_STATS_CONTEXT);
-  Local<Value> CENSUS_TRACING_CONTEXT(
-      Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT));
-  Nan::Set(propagate, Nan::New("CENSUS_TRACING_CONTEXT").ToLocalChecked(),
-           CENSUS_TRACING_CONTEXT);
-  Local<Value> CANCELLATION(
-      Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_CANCELLATION));
-  Nan::Set(propagate, Nan::New("CANCELLATION").ToLocalChecked(), CANCELLATION);
-  Local<Value> DEFAULTS(Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_DEFAULTS));
-  Nan::Set(propagate, Nan::New("DEFAULTS").ToLocalChecked(), DEFAULTS);
-}
-
 void InitConnectivityStateConstants(Local<Object> exports) {
   Nan::HandleScope scope;
   Local<Object> channel_state = Nan::New<Object>();
@@ -252,28 +139,6 @@
            FATAL_FAILURE);
 }
 
-void InitWriteFlags(Local<Object> exports) {
-  Nan::HandleScope scope;
-  Local<Object> write_flags = Nan::New<Object>();
-  Nan::Set(exports, Nan::New("writeFlags").ToLocalChecked(), write_flags);
-  Local<Value> BUFFER_HINT(Nan::New<Uint32, uint32_t>(GRPC_WRITE_BUFFER_HINT));
-  Nan::Set(write_flags, Nan::New("BUFFER_HINT").ToLocalChecked(), BUFFER_HINT);
-  Local<Value> NO_COMPRESS(Nan::New<Uint32, uint32_t>(GRPC_WRITE_NO_COMPRESS));
-  Nan::Set(write_flags, Nan::New("NO_COMPRESS").ToLocalChecked(), NO_COMPRESS);
-}
-
-void InitLogConstants(Local<Object> exports) {
-  Nan::HandleScope scope;
-  Local<Object> log_verbosity = Nan::New<Object>();
-  Nan::Set(exports, Nan::New("logVerbosity").ToLocalChecked(), log_verbosity);
-  Local<Value> LOG_DEBUG(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_DEBUG));
-  Nan::Set(log_verbosity, Nan::New("DEBUG").ToLocalChecked(), LOG_DEBUG);
-  Local<Value> LOG_INFO(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_INFO));
-  Nan::Set(log_verbosity, Nan::New("INFO").ToLocalChecked(), LOG_INFO);
-  Local<Value> LOG_ERROR(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_ERROR));
-  Nan::Set(log_verbosity, Nan::New("ERROR").ToLocalChecked(), LOG_ERROR);
-}
-
 NAN_METHOD(MetadataKeyIsLegal) {
   if (!info[0]->IsString()) {
     return Nan::ThrowTypeError("headerKeyIsLegal's argument must be a string");
@@ -421,13 +286,8 @@
   grpc_set_ssl_roots_override_callback(get_ssl_roots_override);
   init_logger();
 
-  InitStatusConstants(exports);
-  InitCallErrorConstants(exports);
   InitOpTypeConstants(exports);
-  InitPropagateConstants(exports);
   InitConnectivityStateConstants(exports);
-  InitWriteFlags(exports);
-  InitLogConstants(exports);
 
   grpc_pollset_work_run_loop = 0;
 
diff --git a/src/node/index.js b/src/node/index.js
index 76ab174..2da77c3 100644
--- a/src/node/index.js
+++ b/src/node/index.js
@@ -59,6 +59,8 @@
 var protobuf_js_5_common = require('./src/protobuf_js_5_common');
 var protobuf_js_6_common = require('./src/protobuf_js_6_common');
 
+var constants = require('./src/constants.js');
+
 grpc.setDefaultRootsPem(fs.readFileSync(SSL_ROOTS_PATH, 'ascii'));
 
 /**
@@ -68,8 +70,6 @@
  *   Buffers. Defaults to false
  * - longsAsStrings: deserialize long values as strings instead of objects.
  *   Defaults to true
- * - enumsAsStrings: deserialize enum values as strings instead of numbers.
- *   Defaults to true
  * - deprecatedArgumentOrder: Use the beta method argument order for client
  *   methods, with optional arguments after the callback. Defaults to false.
  *   This option is only a temporary stopgap measure to smooth an API breakage.
@@ -103,10 +103,6 @@
   switch (protobufjsVersion) {
     case 6: return protobuf_js_6_common.loadObject(value, options);
     case 5:
-    var deprecation_message = 'Calling grpc.loadObject with an object ' +
-        'generated by ProtoBuf.js 5 is deprecated. Please upgrade to ' +
-        'ProtoBuf.js 6.';
-    common.log(grpc.logVerbosity.INFO, deprecation_message);
     return protobuf_js_5_common.loadObject(value, options);
     default:
     throw new Error('Unrecognized protobufjsVersion', protobufjsVersion);
@@ -115,19 +111,6 @@
 
 var loadObject = exports.loadObject;
 
-function applyProtoRoot(filename, root) {
-  if (_.isString(filename)) {
-    return filename;
-  }
-  filename.root = path.resolve(filename.root) + '/';
-  root.resolvePath = function(originPath, importPath, alreadyNormalized) {
-    return ProtoBuf.util.path.resolve(filename.root,
-                                      importPath,
-                                      alreadyNormalized);
-  };
-  return filename.file;
-}
-
 /**
  * Load a gRPC object from a .proto file. The options object can provide the
  * following options:
@@ -137,8 +120,6 @@
  *   Buffers. Defaults to false
  * - longsAsStrings: deserialize long values as strings instead of objects.
  *   Defaults to true
- * - enumsAsStrings: deserialize enum values as strings instead of numbers.
- *   Defaults to true
  * - deprecatedArgumentOrder: Use the beta method argument order for client
  *   methods, with optional arguments after the callback. Defaults to false.
  *   This option is only a temporary stopgap measure to smooth an API breakage.
@@ -150,17 +131,31 @@
  * @return {Object<string, *>} The resulting gRPC object
  */
 exports.load = function load(filename, format, options) {
-  /* Note: format is currently unused, because the API for loading a proto
-     file or a JSON file is identical in Protobuf.js 6. In the future, there is
-     still the possibility of adding other formats that would be loaded
-     differently */
   options = _.defaults(options, common.defaultGrpcOptions);
-  options.protobufjs_version = 6;
-  var root = new ProtoBuf.Root();
-  var parse_options = {keepCase: !options.convertFieldsToCamelCase};
-  return loadObject(root.loadSync(applyProtoRoot(filename, root),
-                                  parse_options),
-                    options);
+  options.protobufjsVersion = 5;
+  if (!format) {
+    format = 'proto';
+  }
+  var convertFieldsToCamelCaseOriginal = ProtoBuf.convertFieldsToCamelCase;
+  if(options && options.hasOwnProperty('convertFieldsToCamelCase')) {
+    ProtoBuf.convertFieldsToCamelCase = options.convertFieldsToCamelCase;
+  }
+  var builder;
+  try {
+    switch(format) {
+      case 'proto':
+      builder = ProtoBuf.loadProtoFile(filename);
+      break;
+      case 'json':
+      builder = ProtoBuf.loadJsonFile(filename);
+      break;
+      default:
+      throw new Error('Unrecognized format "' + format + '"');
+    }
+  } finally {
+    ProtoBuf.convertFieldsToCamelCase = convertFieldsToCamelCaseOriginal;
+  }
+  return loadObject(builder.ns, options);
 };
 
 var log_template = _.template(
@@ -212,27 +207,27 @@
 /**
  * Status name to code number mapping
  */
-exports.status = grpc.status;
+exports.status = constants.status;
 
 /**
  * Propagate flag name to number mapping
  */
-exports.propagate = grpc.propagate;
+exports.propagate = constants.propagate;
 
 /**
  * Call error name to code number mapping
  */
-exports.callError = grpc.callError;
+exports.callError = constants.callError;
 
 /**
  * Write flag name to code number mapping
  */
-exports.writeFlags = grpc.writeFlags;
+exports.writeFlags = constants.writeFlags;
 
 /**
  * Log verbosity setting name to code number mapping
  */
-exports.logVerbosity = grpc.logVerbosity;
+exports.logVerbosity = constants.logVerbosity;
 
 /**
  * Credentials factories
diff --git a/src/node/jsdoc_conf.json b/src/node/jsdoc_conf.json
index c3a0174..2d96775 100644
--- a/src/node/jsdoc_conf.json
+++ b/src/node/jsdoc_conf.json
@@ -11,7 +11,7 @@
     "package": "package.json",
     "readme": "src/node/README.md"
   },
-  "plugins": [],
+  "plugins": ["plugins/markdown"],
   "templates": {
     "cleverLinks": false,
     "monospaceLinks": false,
diff --git a/src/node/src/client.js b/src/node/src/client.js
index 43502da..16fe06a 100644
--- a/src/node/src/client.js
+++ b/src/node/src/client.js
@@ -58,6 +58,8 @@
 
 var Metadata = require('./metadata');
 
+var constants = require('./constants');
+
 var EventEmitter = require('events').EventEmitter;
 
 var stream = require('stream');
@@ -127,7 +129,8 @@
        but passing an object that causes a serialization failure is a misuse
        of the API anyway, so that's OK. The primary purpose here is to give the
        programmer a useful error and to stop the stream properly */
-    this.call.cancelWithStatus(grpc.status.INTERNAL, 'Serialization failure');
+    this.call.cancelWithStatus(constants.status.INTERNAL,
+                               'Serialization failure');
     callback(e);
   }
   if (_.isFinite(encoding)) {
@@ -185,9 +188,9 @@
 function _readsDone(status) {
   /* jshint validthis: true */
   if (!status) {
-    status = {code: grpc.status.OK, details: 'OK'};
+    status = {code: constants.status.OK, details: 'OK'};
   }
-  if (status.code !== grpc.status.OK) {
+  if (status.code !== constants.status.OK) {
     this.call.cancelWithStatus(status.code, status.details);
   }
   this.finished = true;
@@ -218,12 +221,12 @@
   /* jshint validthis: true */
   var status;
   if (this.read_status && this.received_status) {
-    if (this.read_status.code !== grpc.status.OK) {
+    if (this.read_status.code !== constants.status.OK) {
       status = this.read_status;
     } else {
       status = this.received_status;
     }
-    if (status.code === grpc.status.OK) {
+    if (status.code === constants.status.OK) {
       this.push(null);
     } else {
       var error = new Error(status.details);
@@ -262,7 +265,7 @@
     try {
       deserialized = self.deserialize(data);
     } catch (e) {
-      self._readsDone({code: grpc.status.INTERNAL,
+      self._readsDone({code: constants.status.INTERNAL,
                        details: 'Failed to parse server response'});
       return;
     }
@@ -510,7 +513,7 @@
     var deserialized;
     emitter.emit('metadata', Metadata._fromCoreRepresentation(
         response.metadata));
-    if (status.code === grpc.status.OK) {
+    if (status.code === constants.status.OK) {
       if (err) {
         // Got a batch error, but OK status. Something went wrong
         args.callback(err);
@@ -522,13 +525,13 @@
           /* Change status to indicate bad server response. This will result
            * in passing an error to the callback */
           status = {
-            code: grpc.status.INTERNAL,
+            code: constants.status.INTERNAL,
             details: 'Failed to parse server response'
           };
         }
       }
     }
-    if (status.code !== grpc.status.OK) {
+    if (status.code !== constants.status.OK) {
       error = new Error(status.details);
       error.code = status.code;
       error.metadata = status.metadata;
@@ -593,7 +596,7 @@
     var status = response.status;
     var error;
     var deserialized;
-    if (status.code === grpc.status.OK) {
+    if (status.code === constants.status.OK) {
       if (err) {
         // Got a batch error, but OK status. Something went wrong
         args.callback(err);
@@ -605,13 +608,13 @@
           /* Change status to indicate bad server response. This will result
            * in passing an error to the callback */
           status = {
-            code: grpc.status.INTERNAL,
+            code: constants.status.INTERNAL,
             details: 'Failed to parse server response'
           };
         }
       }
     }
-    if (status.code !== grpc.status.OK) {
+    if (status.code !== constants.status.OK) {
       error = new Error(response.status.details);
       error.code = status.code;
       error.metadata = status.metadata;
@@ -921,7 +924,7 @@
 /**
  * Map of status code names to status codes
  */
-exports.status = grpc.status;
+exports.status = constants.status;
 
 /**
  * See docs for client.callError
diff --git a/src/node/src/constants.js b/src/node/src/constants.js
new file mode 100644
index 0000000..528dab1
--- /dev/null
+++ b/src/node/src/constants.js
@@ -0,0 +1,241 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/**
+ * @module
+ */
+
+/* The comments about status codes are copied verbatim (with some formatting
+ * modifications) from include/grpc/impl/codegen/status.h, for the purpose of
+ * including them in generated documentation.
+ */
+/**
+ * Enum of status codes that gRPC can return
+ * @readonly
+ * @enum {number}
+ */
+exports.status = {
+  /** Not an error; returned on success */
+  OK: 0,
+  /** The operation was cancelled (typically by the caller). */
+  CANCELLED: 1,
+  /**
+   * Unknown error.  An example of where this error may be returned is
+   * if a status value received from another address space belongs to
+   * an error-space that is not known in this address space.  Also
+   * errors raised by APIs that do not return enough error information
+   * may be converted to this error.
+   */
+  UNKNOWN: 2,
+  /**
+   * Client specified an invalid argument.  Note that this differs
+   * from FAILED_PRECONDITION.  INVALID_ARGUMENT indicates arguments
+   * that are problematic regardless of the state of the system
+   * (e.g., a malformed file name).
+   */
+  INVALID_ARGUMENT: 3,
+  /**
+   * Deadline expired before operation could complete.  For operations
+   * that change the state of the system, this error may be returned
+   * even if the operation has completed successfully.  For example, a
+   * successful response from a server could have been delayed long
+   * enough for the deadline to expire.
+   */
+  DEADLINE_EXCEEDED: 4,
+  /** Some requested entity (e.g., file or directory) was not found. */
+  NOT_FOUND: 5,
+  /**
+   * Some entity that we attempted to create (e.g., file or directory)
+   * already exists.
+   */
+  ALREADY_EXISTS: 6,
+  /**
+   * The caller does not have permission to execute the specified
+   * operation.  PERMISSION_DENIED must not be used for rejections
+   * caused by exhausting some resource (use RESOURCE_EXHAUSTED
+   * instead for those errors).  PERMISSION_DENIED must not be
+   * used if the caller can not be identified (use UNAUTHENTICATED
+   * instead for those errors).
+   */
+  PERMISSION_DENIED: 7,
+  /**
+   * Some resource has been exhausted, perhaps a per-user quota, or
+   * perhaps the entire file system is out of space.
+   */
+  RESOURCE_EXHAUSTED: 8,
+  /**
+   * Operation was rejected because the system is not in a state
+   * required for the operation's execution.  For example, directory
+   * to be deleted may be non-empty, an rmdir operation is applied to
+   * a non-directory, etc.
+   *
+   * A litmus test that may help a service implementor in deciding
+   * between FAILED_PRECONDITION, ABORTED, and UNAVAILABLE:
+   *
+   *  - Use UNAVAILABLE if the client can retry just the failing call.
+   *  - Use ABORTED if the client should retry at a higher-level
+   *    (e.g., restarting a read-modify-write sequence).
+   *  - Use FAILED_PRECONDITION if the client should not retry until
+   *    the system state has been explicitly fixed.  E.g., if an "rmdir"
+   *    fails because the directory is non-empty, FAILED_PRECONDITION
+   *    should be returned since the client should not retry unless
+   *    they have first fixed up the directory by deleting files from it.
+   *  - Use FAILED_PRECONDITION if the client performs conditional
+   *    REST Get/Update/Delete on a resource and the resource on the
+   *    server does not match the condition. E.g., conflicting
+   *    read-modify-write on the same resource.
+   */
+  FAILED_PRECONDITION: 9,
+  /**
+   * The operation was aborted, typically due to a concurrency issue
+   * like sequencer check failures, transaction aborts, etc.
+   *
+   * See litmus test above for deciding between FAILED_PRECONDITION,
+   * ABORTED, and UNAVAILABLE.
+   */
+  ABORTED: 10,
+  /**
+   * Operation was attempted past the valid range.  E.g., seeking or
+   * reading past end of file.
+   *
+   * Unlike INVALID_ARGUMENT, this error indicates a problem that may
+   * be fixed if the system state changes. For example, a 32-bit file
+   * system will generate INVALID_ARGUMENT if asked to read at an
+   * offset that is not in the range [0,2^32-1], but it will generate
+   * OUT_OF_RANGE if asked to read from an offset past the current
+   * file size.
+   *
+   * There is a fair bit of overlap between FAILED_PRECONDITION and
+   * OUT_OF_RANGE.  We recommend using OUT_OF_RANGE (the more specific
+   * error) when it applies so that callers who are iterating through
+   * a space can easily look for an OUT_OF_RANGE error to detect when
+   * they are done.
+   */
+  OUT_OF_RANGE: 11,
+  /** Operation is not implemented or not supported/enabled in this service. */
+  UNIMPLEMENTED: 12,
+  /**
+   * Internal errors.  Means some invariants expected by underlying
+   * system has been broken.  If you see one of these errors,
+   * something is very broken.
+   */
+  INTERNAL: 13,
+  /**
+   * The service is currently unavailable.  This is a most likely a
+   * transient condition and may be corrected by retrying with
+   * a backoff.
+   *
+   * See litmus test above for deciding between FAILED_PRECONDITION,
+   * ABORTED, and UNAVAILABLE. */
+  UNAVAILABLE: 14,
+  /** Unrecoverable data loss or corruption. */
+  DATA_LOSS: 15,
+  /**
+   * The request does not have valid authentication credentials for the
+   * operation.
+   */
+  UNAUTHENTICATED: 16
+};
+
+/* The comments about propagation bit flags are copied rom
+ * include/grpc/impl/codegen/propagation_bits.h for the purpose of including
+ * them in generated documentation.
+ */
+/**
+ * Propagation flags: these can be bitwise or-ed to form the propagation option
+ * for calls.
+ *
+ * Users are encouraged to write propagation masks as deltas from the default.
+ * i.e. write `grpc.propagate.DEFAULTS & ~grpc.propagate.DEADLINE` to disable
+ * deadline propagation.
+ * @enum {number}
+ */
+exports.propagate = {
+  DEADLINE: 1,
+  CENSUS_STATS_CONTEXT: 2,
+  CENSUS_TRACING_CONTEXT: 4,
+  CANCELLATION: 8,
+  DEFAULTS: 65535
+};
+
+/* Many of the following comments are copied from
+ * include/grpc/impl/codegen/grpc_types.h
+ */
+/**
+ * Call error constants. Call errors almost always indicate bugs in the gRPC
+ * library, and these error codes are mainly useful for finding those bugs.
+ * @enum {number}
+ */
+exports.callError = {
+  OK: 0,
+  ERROR: 1,
+  NOT_ON_SERVER: 2,
+  NOT_ON_CLIENT: 3,
+  ALREADY_INVOKED: 5,
+  NOT_INVOKED: 6,
+  ALREADY_FINISHED: 7,
+  TOO_MANY_OPERATIONS: 8,
+  INVALID_FLAGS: 9,
+  INVALID_METADATA: 10,
+  INVALID_MESSAGE: 11,
+  NOT_SERVER_COMPLETION_QUEUE: 12,
+  BATCH_TOO_BIG: 13,
+  PAYLOAD_TYPE_MISMATCH: 14
+};
+
+/**
+ * Write flags: these can be bitwise or-ed to form write options that modify
+ * how data is written.
+ * @enum {number}
+ */
+exports.writeFlags = {
+  /**
+   * Hint that the write may be buffered and need not go out on the wire
+   * immediately. GRPC is free to buffer the message until the next non-buffered
+   * write, or until writes_done, but it need not buffer completely or at all.
+   */
+  BUFFER_HINT: 1,
+  /**
+   * Force compression to be disabled for a particular write
+   */
+  NO_COMPRESS: 2
+};
+
+/**
+ * @enum {number}
+ */
+exports.logVerbosity = {
+  DEBUG: 0,
+  INFO: 1,
+  ERROR: 2
+};
diff --git a/src/node/src/credentials.js b/src/node/src/credentials.js
index 51ff1da..b1e86bb 100644
--- a/src/node/src/credentials.js
+++ b/src/node/src/credentials.js
@@ -71,6 +71,8 @@
 
 var common = require('./common.js');
 
+var constants = require('./constants');
+
 var _ = require('lodash');
 
 /**
@@ -97,14 +99,14 @@
   return CallCredentials.createFromPlugin(function(service_url, cb_data,
                                                    callback) {
     metadata_generator({service_url: service_url}, function(error, metadata) {
-      var code = grpc.status.OK;
+      var code = constants.status.OK;
       var message = '';
       if (error) {
         message = error.message;
         if (error.hasOwnProperty('code') && _.isFinite(error.code)) {
           code = error.code;
         } else {
-          code = grpc.status.UNAUTHENTICATED;
+          code = constants.status.UNAUTHENTICATED;
         }
         if (!metadata) {
           metadata = new Metadata();
@@ -125,7 +127,7 @@
     var service_url = auth_context.service_url;
     google_credential.getRequestMetadata(service_url, function(err, header) {
       if (err) {
-        common.log(grpc.logVerbosity.INFO, 'Auth error:' + err);
+        common.log(constants.logVerbosity.INFO, 'Auth error:' + err);
         callback(err);
         return;
       }
diff --git a/src/node/src/protobuf_js_5_common.js b/src/node/src/protobuf_js_5_common.js
index 62cf2f4..4041e05 100644
--- a/src/node/src/protobuf_js_5_common.js
+++ b/src/node/src/protobuf_js_5_common.js
@@ -45,8 +45,7 @@
  *     objects. Defaults to true
  * @return {function(Buffer):cls} The deserialization function
  */
-exports.deserializeCls = function deserializeCls(cls, binaryAsBase64,
-                                                 longsAsStrings) {
+exports.deserializeCls = function deserializeCls(cls, options) {
   /**
    * Deserialize a buffer to a message object
    * @param {Buffer} arg_buf The buffer to deserialize
@@ -55,7 +54,8 @@
   return function deserialize(arg_buf) {
     // Convert to a native object with binary fields as Buffers (first argument)
     // and longs as strings (second argument)
-    return cls.decode(arg_buf).toRaw(binaryAsBase64, longsAsStrings);
+    return cls.decode(arg_buf).toRaw(options.binaryAsBase64,
+                                     options.longsAsStrings);
   };
 };
 
@@ -128,10 +128,10 @@
       responseType: method.resolvedResponseType,
       requestSerialize: serializeCls(method.resolvedRequestType.build()),
       requestDeserialize: deserializeCls(method.resolvedRequestType.build(),
-                                         binaryAsBase64, longsAsStrings),
+                                         options),
       responseSerialize: serializeCls(method.resolvedResponseType.build()),
       responseDeserialize: deserializeCls(method.resolvedResponseType.build(),
-                                          binaryAsBase64, longsAsStrings)
+                                          options)
     };
   }));
 };
diff --git a/src/node/src/server.js b/src/node/src/server.js
index 3450abe..1d9cc7d 100644
--- a/src/node/src/server.js
+++ b/src/node/src/server.js
@@ -57,6 +57,8 @@
 
 var Metadata = require('./metadata');
 
+var constants = require('./constants');
+
 var stream = require('stream');
 
 var Readable = stream.Readable;
@@ -75,7 +77,7 @@
 function handleError(call, error) {
   var statusMetadata = new Metadata();
   var status = {
-    code: grpc.status.UNKNOWN,
+    code: constants.status.UNKNOWN,
     details: 'Unknown Error'
   };
   if (error.hasOwnProperty('message')) {
@@ -115,7 +117,7 @@
   var end_batch = {};
   var statusMetadata = new Metadata();
   var status = {
-    code: grpc.status.OK,
+    code: constants.status.OK,
     details: 'OK'
   };
   if (metadata) {
@@ -125,7 +127,7 @@
   try {
     message = serialize(value);
   } catch (e) {
-    e.code = grpc.status.INTERNAL;
+    e.code = constants.status.INTERNAL;
     handleError(call, e);
     return;
   }
@@ -151,7 +153,7 @@
 function setUpWritable(stream, serialize) {
   stream.finished = false;
   stream.status = {
-    code : grpc.status.OK,
+    code : constants.status.OK,
     details : 'OK',
     metadata : new Metadata()
   };
@@ -178,7 +180,7 @@
    * @param {Error} err The error object
    */
   function setStatus(err) {
-    var code = grpc.status.UNKNOWN;
+    var code = constants.status.UNKNOWN;
     var details = 'Unknown Error';
     var metadata = new Metadata();
     if (err.hasOwnProperty('message')) {
@@ -284,7 +286,7 @@
   try {
     message = this.serialize(chunk);
   } catch (e) {
-    e.code = grpc.status.INTERNAL;
+    e.code = constants.status.INTERNAL;
     callback(e);
     return;
   }
@@ -353,7 +355,7 @@
     try {
       deserialized = self.deserialize(data);
     } catch (e) {
-      e.code = grpc.status.INTERNAL;
+      e.code = constants.status.INTERNAL;
       self.emit('error', e);
       return;
     }
@@ -489,7 +491,7 @@
     try {
       emitter.request = handler.deserialize(result.read);
     } catch (e) {
-      e.code = grpc.status.INTERNAL;
+      e.code = constants.status.INTERNAL;
       handleError(call, e);
       return;
     }
@@ -530,7 +532,7 @@
     try {
       stream.request = handler.deserialize(result.read);
     } catch (e) {
-      e.code = grpc.status.INTERNAL;
+      e.code = constants.status.INTERNAL;
       stream.emit('error', e);
       return;
     }
@@ -636,7 +638,7 @@
         batch[grpc.opType.SEND_INITIAL_METADATA] =
             (new Metadata())._getCoreRepresentation();
         batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
-          code: grpc.status.UNIMPLEMENTED,
+          code: constants.status.UNIMPLEMENTED,
           details: '',
           metadata: {}
         };
@@ -699,7 +701,7 @@
 };
 
 var unimplementedStatusResponse = {
-  code: grpc.status.UNIMPLEMENTED,
+  code: constants.status.UNIMPLEMENTED,
   details: 'The server does not implement this method'
 };
 
@@ -759,8 +761,8 @@
          written in the proto file, instead of using JavaScript function
          naming style */
       if (implementation[attrs.originalName] === undefined) {
-        common.log(grpc.logVerbosity.ERROR, 'Method handler ' + name + ' for ' +
-            attrs.path + ' expected but not provided');
+        common.log(constants.logVerbosity.ERROR, 'Method handler ' + name +
+            ' for ' + attrs.path + ' expected but not provided');
         impl = defaultHandler[method_type];
       } else {
         impl = _.bind(implementation[attrs.originalName], implementation);
@@ -779,6 +781,11 @@
   });
 };
 
+var logAddProtoServiceDeprecationOnce = _.once(function() {
+    common.log(constants.logVerbosity.INFO,
+               'Server#addProtoService is deprecated. Use addService instead');
+});
+
 /**
  * Add a proto service to the server, with a corresponding implementation
  * @deprecated Use grpc.load and Server#addService instead
@@ -790,8 +797,7 @@
   var options;
   var protobuf_js_5_common = require('./protobuf_js_5_common');
   var protobuf_js_6_common = require('./protobuf_js_6_common');
-  common.log(grpc.logVerbosity.INFO,
-             'Server#addProtoService is deprecated. Use addService instead');
+  logAddProtoServiceDeprecationOnce();
   if (protobuf_js_5_common.isProbablyProtobufJs5(service)) {
     options = _.defaults(service.grpc_options, common.defaultGrpcOptions);
     this.addService(
diff --git a/src/node/test/call_test.js b/src/node/test/call_test.js
index eb26860..f25268e 100644
--- a/src/node/test/call_test.js
+++ b/src/node/test/call_test.js
@@ -35,6 +35,7 @@
 
 var assert = require('assert');
 var grpc = require('../src/grpc_extension');
+var constants = require('../src/constants');
 
 /**
  * Helper function to return an absolute deadline given a relative timeout in
@@ -120,7 +121,8 @@
       var batch = {};
       batch[grpc.opType.RECV_STATUS_ON_CLIENT] = true;
       call.startBatch(batch, function(err, response) {
-        assert.strictEqual(response.status.code, grpc.status.DEADLINE_EXCEEDED);
+        assert.strictEqual(response.status.code,
+                           constants.status.DEADLINE_EXCEEDED);
         done();
       });
     });
diff --git a/src/node/test/common_test.js b/src/node/test/common_test.js
index e1ce864..b7c2c6a 100644
--- a/src/node/test/common_test.js
+++ b/src/node/test/common_test.js
@@ -37,16 +37,15 @@
 var _ = require('lodash');
 
 var common = require('../src/common');
-var protobuf_js_6_common = require('../src/protobuf_js_6_common');
+var protobuf_js_5_common = require('../src/protobuf_js_5_common');
 
-var serializeCls = protobuf_js_6_common.serializeCls;
-var deserializeCls = protobuf_js_6_common.deserializeCls;
+var serializeCls = protobuf_js_5_common.serializeCls;
+var deserializeCls = protobuf_js_5_common.deserializeCls;
 
 var ProtoBuf = require('protobufjs');
 
-var messages_proto = new ProtoBuf.Root();
-messages_proto = messages_proto.loadSync(
-    __dirname + '/test_messages.proto', {keepCase: true}).resolveAll();
+var messages_proto = ProtoBuf.loadProtoFile(
+    __dirname + '/test_messages.proto').build();
 
 var default_options = common.defaultGrpcOptions;
 
@@ -101,6 +100,7 @@
     var longNumDeserialize = deserializeCls(messages_proto.LongValues,
                                             num_options);
     var serialized = longSerialize({int_64: pos_value});
+    console.log(longDeserialize(serialized));
     assert.strictEqual(typeof longDeserialize(serialized).int_64, 'string');
     /* With the longsAsStrings option disabled, long values are represented as
      * objects with 3 keys: low, high, and unsigned */
@@ -136,7 +136,8 @@
     var serialized = sequenceSerialize({repeated_field: [10]});
     assert.strictEqual(expected_serialize.compare(serialized), 0);
   });
-  it('should deserialize packed or unpacked repeated', function() {
+  // This tests a bug that was fixed in Protobuf.js 6
+  it.skip('should deserialize packed or unpacked repeated', function() {
     var expectedDeserialize = {
       bytes_field: new Buffer(''),
       repeated_field: [10]
@@ -155,7 +156,8 @@
     assert.deepEqual(unpackedDeserialized, expectedDeserialize);
   });
 });
-describe('Proto message oneof serialize and deserialize', function() {
+// This tests a bug that was fixed in Protobuf.js 6
+describe.skip('Proto message oneof serialize and deserialize', function() {
   var oneofSerialize = serializeCls(messages_proto.OneOfValues);
   var oneofDeserialize = deserializeCls(
       messages_proto.OneOfValues, default_options);
@@ -193,7 +195,8 @@
     assert.deepEqual(enumDeserialize(nameSerialized),
                      enumDeserialize(numberSerialized));
   });
-  it('Should deserialize as a string the enumsAsStrings option', function() {
+  // This tests a bug that was fixed in Protobuf.js 6
+  it.skip('Should correctly handle the enumsAsStrings option', function() {
     var serialized = enumSerialize({enum_value: 'TWO'});
     var nameDeserialized = enumDeserialize(serialized);
     var numberDeserialized = enumIntDeserialize(serialized);
diff --git a/src/node/test/constant_test.js b/src/node/test/constant_test.js
deleted file mode 100644
index 414b1ac..0000000
--- a/src/node/test/constant_test.js
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-'use strict';
-
-var assert = require('assert');
-var grpc = require('../src/grpc_extension');
-
-/**
- * List of all status names
- * @const
- * @type {Array.<string>}
- */
-var statusNames = [
-  'OK',
-  'CANCELLED',
-  'UNKNOWN',
-  'INVALID_ARGUMENT',
-  'DEADLINE_EXCEEDED',
-  'NOT_FOUND',
-  'ALREADY_EXISTS',
-  'PERMISSION_DENIED',
-  'UNAUTHENTICATED',
-  'RESOURCE_EXHAUSTED',
-  'FAILED_PRECONDITION',
-  'ABORTED',
-  'OUT_OF_RANGE',
-  'UNIMPLEMENTED',
-  'INTERNAL',
-  'UNAVAILABLE',
-  'DATA_LOSS'
-];
-
-/**
- * List of all call error names
- * @const
- * @type {Array.<string>}
- */
-var callErrorNames = [
-  'OK',
-  'ERROR',
-  'NOT_ON_SERVER',
-  'NOT_ON_CLIENT',
-  'ALREADY_INVOKED',
-  'NOT_INVOKED',
-  'ALREADY_FINISHED',
-  'TOO_MANY_OPERATIONS',
-  'INVALID_FLAGS'
-];
-
-/**
- * List of all propagate flag names
- * @const
- * @type {Array.<string>}
- */
-var propagateFlagNames = [
-  'DEADLINE',
-  'CENSUS_STATS_CONTEXT',
-  'CENSUS_TRACING_CONTEXT',
-  'CANCELLATION',
-  'DEFAULTS'
-];
-/*
- * List of all connectivity state names
- * @const
- * @type {Array.<string>}
- */
-var connectivityStateNames = [
-  'IDLE',
-  'CONNECTING',
-  'READY',
-  'TRANSIENT_FAILURE',
-  'FATAL_FAILURE'
-];
-
-describe('constants', function() {
-  it('should have all of the status constants', function() {
-    for (var i = 0; i < statusNames.length; i++) {
-      assert(grpc.status.hasOwnProperty(statusNames[i]),
-             'status missing: ' + statusNames[i]);
-    }
-  });
-  it('should have all of the call errors', function() {
-    for (var i = 0; i < callErrorNames.length; i++) {
-      assert(grpc.callError.hasOwnProperty(callErrorNames[i]),
-             'call error missing: ' + callErrorNames[i]);
-    }
-  });
-  it('should have all of the propagate flags', function() {
-    for (var i = 0; i < propagateFlagNames.length; i++) {
-      assert(grpc.propagate.hasOwnProperty(propagateFlagNames[i]),
-             'call error missing: ' + propagateFlagNames[i]);
-    }
-  });
-  it('should have all of the connectivity states', function() {
-    for (var i = 0; i < connectivityStateNames.length; i++) {
-      assert(grpc.connectivityState.hasOwnProperty(connectivityStateNames[i]),
-             'connectivity status missing: ' + connectivityStateNames[i]);
-    }
-  });
-});
diff --git a/src/node/test/end_to_end_test.js b/src/node/test/end_to_end_test.js
index f127a41..af455e2 100644
--- a/src/node/test/end_to_end_test.js
+++ b/src/node/test/end_to_end_test.js
@@ -35,6 +35,7 @@
 
 var assert = require('assert');
 var grpc = require('../src/grpc_extension');
+var constants = require('../src/constants');
 
 /**
  * This is used for testing functions with multiple asynchronous calls that
@@ -90,7 +91,7 @@
         client_close: true,
         metadata: {},
         status: {
-          code: grpc.status.OK,
+          code: constants.status.OK,
           details: status_text,
           metadata: {}
         }
@@ -107,7 +108,7 @@
       server_batch[grpc.opType.SEND_INITIAL_METADATA] = {};
       server_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
         metadata: {},
-        code: grpc.status.OK,
+        code: constants.status.OK,
         details: status_text
       };
       server_batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
@@ -141,7 +142,7 @@
         send_metadata: true,
         client_close: true,
         metadata: {server_key: ['server_value']},
-        status: {code: grpc.status.OK,
+        status: {code: constants.status.OK,
                  details: status_text,
                  metadata: {}}
       });
@@ -161,7 +162,7 @@
       };
       server_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
         metadata: {},
-        code: grpc.status.OK,
+        code: constants.status.OK,
         details: status_text
       };
       server_batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
@@ -198,7 +199,7 @@
       assert.deepEqual(response.metadata, {});
       assert(response.send_message);
       assert.strictEqual(response.read.toString(), reply_text);
-      assert.deepEqual(response.status, {code: grpc.status.OK,
+      assert.deepEqual(response.status, {code: constants.status.OK,
                                          details: status_text,
                                          metadata: {}});
       done();
@@ -220,7 +221,7 @@
         response_batch[grpc.opType.SEND_MESSAGE] = new Buffer(reply_text);
         response_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
           metadata: {},
-          code: grpc.status.OK,
+          code: constants.status.OK,
           details: status_text
         };
         response_batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
@@ -260,7 +261,7 @@
           send_message: true,
           client_close: true,
           status: {
-            code: grpc.status.OK,
+            code: constants.status.OK,
             details: status_text,
             metadata: {}
           }
@@ -290,7 +291,7 @@
           end_batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
           end_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
             metadata: {},
-            code: grpc.status.OK,
+            code: constants.status.OK,
             details: status_text
           };
           server_call.startBatch(end_batch, function(err, response) {
diff --git a/src/node/test/surface_test.js b/src/node/test/surface_test.js
index 783028f..d2f0511 100644
--- a/src/node/test/surface_test.js
+++ b/src/node/test/surface_test.js
@@ -43,9 +43,8 @@
 
 var grpc = require('..');
 
-var math_proto = new ProtoBuf.Root();
-math_proto = math_proto.loadSync(__dirname +
-    '/../../proto/math/math.proto', {keepCase: true});
+var math_proto = ProtoBuf.loadProtoFile(__dirname +
+    '/../../proto/math/math.proto');
 
 var mathService = math_proto.lookup('math.Math');
 var mathServiceAttrs = grpc.loadObject(
@@ -332,9 +331,7 @@
   var server;
   var client;
   before(function() {
-    var test_proto = new ProtoBuf.Root();
-    test_proto = test_proto.loadSync(__dirname + '/echo_service.proto',
-                                         {keepCase: true});
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/echo_service.proto');
     var echo_service = test_proto.lookup('EchoService');
     var Client = grpc.loadObject(echo_service);
     server = new grpc.Server();
@@ -357,6 +354,13 @@
       done();
     });
   });
+  it('Should convert an undefined argument to default values', function(done) {
+    client.echo(undefined, function(error, response) {
+      assert.ifError(error);
+      assert.deepEqual(response, {value: '', value2: 0});
+      done();
+    });
+  });
 });
 describe('Generic client and server', function() {
   function toString(val) {
@@ -457,9 +461,7 @@
   var server;
   var metadata;
   before(function() {
-    var test_proto = new ProtoBuf.Root();
-    test_proto = test_proto.loadSync(__dirname + '/test_service.proto',
-                                         {keepCase: true});
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
     var test_service = test_proto.lookup('TestService');
     var Client = grpc.loadObject(test_service);
     server = new grpc.Server();
@@ -560,9 +562,7 @@
   var client;
   var badArg = new Buffer([0xFF]);
   before(function() {
-    var test_proto = new ProtoBuf.Root();
-    test_proto = test_proto.loadSync(__dirname + '/test_service.proto',
-                                         {keepCase: true});
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
     var test_service = test_proto.lookup('TestService');
     var malformed_test_service = {
       unary: {
@@ -669,9 +669,7 @@
   var client;
   var server;
   before(function() {
-    var test_proto = new ProtoBuf.Root();
-    test_proto = test_proto.loadSync(__dirname + '/test_service.proto',
-                                         {keepCase: true});
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
     var test_service = test_proto.lookup('TestService');
     var malformed_test_service = {
       unary: {
@@ -772,16 +770,13 @@
   });
 });
 describe('Other conditions', function() {
-  var test_service;
   var Client;
   var client;
   var server;
   var port;
   before(function() {
-    var test_proto = new ProtoBuf.Root();
-    test_proto = test_proto.loadSync(__dirname + '/test_service.proto',
-                                         {keepCase: true});
-    test_service = test_proto.lookup('TestService');
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
+    var test_service = test_proto.lookup('TestService');
     Client = grpc.loadObject(test_service);
     server = new grpc.Server();
     var trailer_metadata = new grpc.Metadata();
@@ -1121,15 +1116,12 @@
   var proxy;
   var proxy_impl;
 
-  var test_service;
   var Client;
   var client;
   var server;
   before(function() {
-    var test_proto = new ProtoBuf.Root();
-    test_proto = test_proto.loadSync(__dirname + '/test_service.proto',
-                                         {keepCase: true});
-    test_service = test_proto.lookup('TestService');
+    var test_proto = ProtoBuf.loadProtoFile(__dirname + '/test_service.proto');
+    var test_service = test_proto.lookup('TestService');
     server = new grpc.Server();
     Client = grpc.loadObject(test_service);
     server.addService(Client.service, {
diff --git a/src/php/README.md b/src/php/README.md
index f9f93ba..90c8cb3 100644
--- a/src/php/README.md
+++ b/src/php/README.md
@@ -174,6 +174,28 @@
 ```
 
 
+### Protobuf Runtime library
+
+There are two protobuf runtime libraries to choose from. They are idenfical in terms of APIs offered.
+
+1. C implementation (for better performance)
+
+``` sh
+$ sudo pecl install protobuf
+```
+
+2. PHP implementation (for easier installation)
+
+
+Add this to your `composer.json` file:
+
+```
+  "require": {
+    "google/protobuf": "^v3.3.0"
+  }
+``` 
+
+
 ### PHP Protoc Plugin
 
 You need the gRPC PHP protoc plugin to generate the client stub classes.
diff --git a/src/php/ext/grpc/call.c b/src/php/ext/grpc/call.c
index d3fd884..94e0b73 100644
--- a/src/php/ext/grpc/call.c
+++ b/src/php/ext/grpc/call.c
@@ -125,7 +125,12 @@
       php_grpc_add_next_index_stringl(inner_array, str_val,
                                       GRPC_SLICE_LENGTH(elem->value), false);
       add_assoc_zval(array, str_key, inner_array);
+      PHP_GRPC_FREE_STD_ZVAL(inner_array);
     }
+    efree(str_key);
+#if PHP_MAJOR_VERSION >= 7
+    efree(str_val);
+#endif
   }
   return array;
 }
@@ -256,8 +261,6 @@
   object_init(result);
   php_grpc_ulong index;
   zval *recv_status;
-  PHP_GRPC_MAKE_STD_ZVAL(recv_status);
-  object_init(recv_status);
   zval *value;
   zval *inner_value;
   zval *message_value;
@@ -439,7 +442,7 @@
   grpc_completion_queue_pluck(completion_queue, call->wrapped,
                               gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
 #if PHP_MAJOR_VERSION >= 7
-  zval recv_md;
+  zval *recv_md;
 #endif
   for (int i = 0; i < op_num; i++) {
     switch(ops[i].op) {
@@ -460,8 +463,10 @@
       array = grpc_parse_metadata_array(&recv_metadata TSRMLS_CC);
       add_property_zval(result, "metadata", array);
 #else
-      recv_md = *grpc_parse_metadata_array(&recv_metadata);
-      add_property_zval(result, "metadata", &recv_md);
+      recv_md = grpc_parse_metadata_array(&recv_metadata);
+      add_property_zval(result, "metadata", recv_md);
+      zval_ptr_dtor(recv_md);
+      PHP_GRPC_FREE_STD_ZVAL(recv_md);
 #endif
       PHP_GRPC_DELREF(array);
       break;
@@ -475,12 +480,16 @@
       }
       break;
     case GRPC_OP_RECV_STATUS_ON_CLIENT:
+      PHP_GRPC_MAKE_STD_ZVAL(recv_status);
+      object_init(recv_status);
 #if PHP_MAJOR_VERSION < 7
       array = grpc_parse_metadata_array(&recv_trailing_metadata TSRMLS_CC);
       add_property_zval(recv_status, "metadata", array);
 #else
-      recv_md = *grpc_parse_metadata_array(&recv_trailing_metadata);
-      add_property_zval(recv_status, "metadata", &recv_md);
+      recv_md = grpc_parse_metadata_array(&recv_trailing_metadata);
+      add_property_zval(recv_status, "metadata", recv_md);
+      zval_ptr_dtor(recv_md);
+      PHP_GRPC_FREE_STD_ZVAL(recv_md);
 #endif
       PHP_GRPC_DELREF(array);
       add_property_long(recv_status, "code", status);
@@ -489,6 +498,9 @@
                                    true);
       gpr_free(status_details_text);
       add_property_zval(result, "status", recv_status);
+#if PHP_MAJOR_VERSION >= 7
+      zval_ptr_dtor(recv_status);
+#endif
       PHP_GRPC_DELREF(recv_status);
       PHP_GRPC_FREE_STD_ZVAL(recv_status);
       break;
diff --git a/src/php/ext/grpc/call_credentials.c b/src/php/ext/grpc/call_credentials.c
index 625c0c6..da7100f 100644
--- a/src/php/ext/grpc/call_credentials.c
+++ b/src/php/ext/grpc/call_credentials.c
@@ -172,34 +172,54 @@
   object_init(arg);
   php_grpc_add_property_string(arg, "service_url", context.service_url, true);
   php_grpc_add_property_string(arg, "method_name", context.method_name, true);
-  zval *retval;
-  PHP_GRPC_MAKE_STD_ZVAL(retval);
+  zval *retval = NULL;
 #if PHP_MAJOR_VERSION < 7
   zval **params[1];
   params[0] = &arg;
   state->fci->params = params;
   state->fci->retval_ptr_ptr = &retval;
 #else
+  PHP_GRPC_MAKE_STD_ZVAL(retval);
   state->fci->params = arg;
   state->fci->retval = retval;
 #endif
   state->fci->param_count = 1;
 
+  PHP_GRPC_DELREF(arg);
+
   /* call the user callback function */
   zend_call_function(state->fci, state->fci_cache TSRMLS_CC);
 
   grpc_status_code code = GRPC_STATUS_OK;
   grpc_metadata_array metadata;
+  bool cleanup = true;
 
   if (Z_TYPE_P(retval) != IS_ARRAY) {
+    cleanup = false;
     code = GRPC_STATUS_INVALID_ARGUMENT;
   } else if (!create_metadata_array(retval, &metadata)) {
-    grpc_metadata_array_destroy(&metadata);
     code = GRPC_STATUS_INVALID_ARGUMENT;
   }
 
+  if (retval != NULL) {
+#if PHP_MAJOR_VERSION < 7
+    zval_ptr_dtor(&retval);
+#else
+    zval_ptr_dtor(arg);
+    zval_ptr_dtor(retval);
+    PHP_GRPC_FREE_STD_ZVAL(arg);
+    PHP_GRPC_FREE_STD_ZVAL(retval);
+#endif
+  }
+
   /* Pass control back to core */
   cb(user_data, metadata.metadata, metadata.count, code, NULL);
+  if (cleanup) {
+    for (int i = 0; i < metadata.count; i++) {
+      grpc_slice_unref(metadata.metadata[i].value);
+    }
+    grpc_metadata_array_destroy(&metadata);
+  }
 }
 
 /* Cleanup function for plugin creds API */
@@ -207,8 +227,10 @@
   plugin_state *state = (plugin_state *)ptr;
   efree(state->fci);
   efree(state->fci_cache);
+#if PHP_MAJOR_VERSION < 7
   PHP_GRPC_FREE_STD_ZVAL(state->fci->params);
   PHP_GRPC_FREE_STD_ZVAL(state->fci->retval);
+#endif
   efree(state);
 }
 
diff --git a/src/php/ext/grpc/php_grpc.h b/src/php/ext/grpc/php_grpc.h
index 13083b0..51f9dd5 100644
--- a/src/php/ext/grpc/php_grpc.h
+++ b/src/php/ext/grpc/php_grpc.h
@@ -40,9 +40,6 @@
 extern zend_module_entry grpc_module_entry;
 #define phpext_grpc_ptr &grpc_module_entry
 
-#define PHP_GRPC_VERSION \
-  "0.1.0" /* Replace with version number for your extension */
-
 #ifdef PHP_WIN32
 #define PHP_GRPC_API __declspec(dllexport)
 #elif defined(__GNUC__) && __GNUC__ >= 4
@@ -56,10 +53,9 @@
 #endif
 
 #include "php.h"
-
 #include "php7_wrapper.h"
-
 #include "grpc/grpc.h"
+#include "version.h"
 
 /* These are all function declarations */
 /* Code that runs at module initialization */
diff --git a/src/php/ext/grpc/version.h b/src/php/ext/grpc/version.h
new file mode 100644
index 0000000..993ef2d
--- /dev/null
+++ b/src/php/ext/grpc/version.h
@@ -0,0 +1,40 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#ifndef VERSION_H
+#define VERSION_H
+
+#define PHP_GRPC_VERSION "1.4.0"
+
+#endif /* VERSION_H */
diff --git a/src/php/tests/qps/composer.json b/src/php/tests/qps/composer.json
index 0fc8709..8c1e7b6 100644
--- a/src/php/tests/qps/composer.json
+++ b/src/php/tests/qps/composer.json
@@ -1,7 +1,8 @@
 {
   "minimum-stability": "dev",
   "require": {
-    "grpc/grpc": "dev-master"
+    "grpc/grpc": "dev-master",
+    "google/protobuf": "^v3.3.0"
   },
   "autoload": {
     "psr-4": {
diff --git a/src/proto/grpc/testing/BUILD b/src/proto/grpc/testing/BUILD
index 805988c..5f1c005 100644
--- a/src/proto/grpc/testing/BUILD
+++ b/src/proto/grpc/testing/BUILD
@@ -42,8 +42,11 @@
 grpc_proto_library(
     name = "control_proto",
     srcs = ["control.proto"],
-    deps = ["payloads_proto", "stats_proto"],
     has_services = False,
+    deps = [
+        "payloads_proto",
+        "stats_proto",
+    ],
 )
 
 grpc_proto_library(
@@ -101,5 +104,8 @@
 grpc_proto_library(
     name = "test_proto",
     srcs = ["test.proto"],
-    deps = ["empty_proto", "messages_proto"],
+    deps = [
+        "empty_proto",
+        "messages_proto",
+    ],
 )
diff --git a/src/proto/grpc/testing/control.proto b/src/proto/grpc/testing/control.proto
index 02b156d..1f4569e 100644
--- a/src/proto/grpc/testing/control.proto
+++ b/src/proto/grpc/testing/control.proto
@@ -244,6 +244,10 @@
   // Number of requests that succeeded/failed
   double successful_requests_per_second = 13;
   double failed_requests_per_second = 14;
+
+  // Number of polls called inside completion queue per request
+  double client_polls_per_request = 15;
+  double server_polls_per_request = 16;
 }
 
 // Results of a single benchmark scenario.
diff --git a/src/proto/grpc/testing/stats.proto b/src/proto/grpc/testing/stats.proto
index 8001416..e236cf1 100644
--- a/src/proto/grpc/testing/stats.proto
+++ b/src/proto/grpc/testing/stats.proto
@@ -47,6 +47,9 @@
 
   // change in idle time of the server (data from proc/stat)
   uint64 idle_cpu_time = 5;
+
+  // Number of polls called inside completion queue
+  uint64 cq_poll_count = 6;
 }
 
 // Histogram params based on grpc/support/histogram.c
@@ -81,4 +84,7 @@
 
   // Number of failed requests (one row per status code seen)
   repeated RequestResultCount request_results = 5;
+
+  // Number of polls called inside completion queue
+  uint64 cq_poll_count = 6;
 }
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index dd2e550..9770301 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -103,6 +103,7 @@
   'src/core/lib/iomgr/ev_epollsig_linux.c',
   'src/core/lib/iomgr/ev_poll_posix.c',
   'src/core/lib/iomgr/ev_posix.c',
+  'src/core/lib/iomgr/ev_windows.c',
   'src/core/lib/iomgr/exec_ctx.c',
   'src/core/lib/iomgr/executor.c',
   'src/core/lib/iomgr/iocp_windows.c',
@@ -320,6 +321,8 @@
   'src/core/ext/census/tracing.c',
   'src/core/ext/filters/max_age/max_age_filter.c',
   'src/core/ext/filters/message_size/message_size_filter.c',
+  'src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c',
+  'src/core/ext/filters/workarounds/workaround_utils.c',
   'src/core/plugin_registry/grpc_plugin_registry.c',
   'src/boringssl/err_data.c',
   'third_party/boringssl/crypto/aes/aes.c',
diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index 7ee5336..658994d 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -56,7 +56,8 @@
     'grpcio>={version}'.format(version=grpc_version.VERSION),
     'grpcio-tools>={version}'.format(version=grpc_version.VERSION),
     'grpcio-health-checking>={version}'.format(version=grpc_version.VERSION),
-    'oauth2client>=1.4.7', 'protobuf>=3.3.0', 'six>=1.10',)
+    'oauth2client>=1.4.7', 'protobuf>=3.3.0', 'six>=1.10', 'google-auth>=1.0.0',
+    'requests>=2.14.2')
 
 COMMAND_CLASS = {
     # Run `preprocess` *before* doing any packaging!
diff --git a/src/python/grpcio_tests/tests/interop/client.py b/src/python/grpcio_tests/tests/interop/client.py
index 97f6843..9be3ba5 100644
--- a/src/python/grpcio_tests/tests/interop/client.py
+++ b/src/python/grpcio_tests/tests/interop/client.py
@@ -29,10 +29,11 @@
 """The Python implementation of the GRPC interoperability test client."""
 
 import argparse
-from oauth2client import client as oauth2client_client
+import os
 
+from google import auth as google_auth
+from google.auth import jwt as google_auth_jwt
 import grpc
-from grpc.beta import implementations
 from src.proto.grpc.testing import test_pb2
 
 from tests.interop import methods
@@ -84,25 +85,24 @@
 def _stub(args):
     target = '{}:{}'.format(args.server_host, args.server_port)
     if args.test_case == 'oauth2_auth_token':
-        google_credentials = _application_default_credentials()
-        scoped_credentials = google_credentials.create_scoped(
-            [args.oauth_scope])
-        access_token = scoped_credentials.get_access_token().access_token
-        call_credentials = grpc.access_token_call_credentials(access_token)
+        google_credentials, unused_project_id = google_auth.default(
+            scopes=[args.oauth_scope])
+        google_credentials.refresh(google_auth.transport.requests.Request())
+        call_credentials = grpc.access_token_call_credentials(
+            google_credentials.token)
     elif args.test_case == 'compute_engine_creds':
-        google_credentials = _application_default_credentials()
-        scoped_credentials = google_credentials.create_scoped(
-            [args.oauth_scope])
-        # TODO(https://github.com/grpc/grpc/issues/6799): Eliminate this last
-        # remaining use of the Beta API.
-        call_credentials = implementations.google_call_credentials(
-            scoped_credentials)
+        google_credentials, unused_project_id = google_auth.default(
+            scopes=[args.oauth_scope])
+        call_credentials = grpc.metadata_call_credentials(
+            google_auth.transport.grpc.AuthMetadataPlugin(
+                credentials=google_credentials,
+                request=google_auth.transport.requests.Request()))
     elif args.test_case == 'jwt_token_creds':
-        google_credentials = _application_default_credentials()
-        # TODO(https://github.com/grpc/grpc/issues/6799): Eliminate this last
-        # remaining use of the Beta API.
-        call_credentials = implementations.google_call_credentials(
-            google_credentials)
+        google_credentials = google_auth_jwt.OnDemandCredentials.from_service_account_file(
+            os.environ[google_auth.environment_vars.CREDENTIALS])
+        call_credentials = grpc.metadata_call_credentials(
+            google_auth.transport.grpc.AuthMetadataPlugin(
+                credentials=google_credentials, request=None))
     else:
         call_credentials = None
     if args.use_tls:
diff --git a/src/python/grpcio_tests/tests/interop/methods.py b/src/python/grpcio_tests/tests/interop/methods.py
index e1016f7..354b51d 100644
--- a/src/python/grpcio_tests/tests/interop/methods.py
+++ b/src/python/grpcio_tests/tests/interop/methods.py
@@ -33,8 +33,10 @@
 import os
 import threading
 
-from oauth2client import client as oauth2client_client
-
+from google import auth as google_auth
+from google.auth import environment_vars as google_auth_environment_vars
+from google.auth.transport import grpc as google_auth_transport_grpc
+from google.auth.transport import requests as google_auth_transport_requests
 import grpc
 from grpc.beta import implementations
 
@@ -401,8 +403,7 @@
 
 
 def _oauth2_auth_token(stub, args):
-    json_key_filename = os.environ[
-        oauth2client_client.GOOGLE_APPLICATION_CREDENTIALS]
+    json_key_filename = os.environ[google_auth_environment_vars.CREDENTIALS]
     wanted_email = json.load(open(json_key_filename, 'rb'))['client_email']
     response = _large_unary_common_behavior(stub, True, True, None)
     if wanted_email != response.username:
@@ -414,8 +415,7 @@
 
 
 def _jwt_token_creds(stub, args):
-    json_key_filename = os.environ[
-        oauth2client_client.GOOGLE_APPLICATION_CREDENTIALS]
+    json_key_filename = os.environ[google_auth_environment_vars.CREDENTIALS]
     wanted_email = json.load(open(json_key_filename, 'rb'))['client_email']
     response = _large_unary_common_behavior(stub, True, False, None)
     if wanted_email != response.username:
@@ -424,15 +424,14 @@
 
 
 def _per_rpc_creds(stub, args):
-    json_key_filename = os.environ[
-        oauth2client_client.GOOGLE_APPLICATION_CREDENTIALS]
+    json_key_filename = os.environ[google_auth_environment_vars.CREDENTIALS]
     wanted_email = json.load(open(json_key_filename, 'rb'))['client_email']
-    credentials = oauth2client_client.GoogleCredentials.get_application_default()
-    scoped_credentials = credentials.create_scoped([args.oauth_scope])
-    # TODO(https://github.com/grpc/grpc/issues/6799): Eliminate this last
-    # remaining use of the Beta API.
-    call_credentials = implementations.google_call_credentials(
-        scoped_credentials)
+    google_credentials, unused_project_id = google_auth.default(
+        scopes=[args.oauth_scope])
+    call_credentials = grpc.metadata_call_credentials(
+        google_auth_transport_grpc.AuthMetadataPlugin(
+            credentials=google_credentials,
+            request=google_auth_transport_requests.Request()))
     response = _large_unary_common_behavior(stub, True, False, call_credentials)
     if wanted_email != response.username:
         raise ValueError('expected username %s, got %s' %
diff --git a/templates/composer.json.template b/templates/composer.json.template
index 2d4cb11..a18624d 100644
--- a/templates/composer.json.template
+++ b/templates/composer.json.template
@@ -8,12 +8,15 @@
     "homepage": "http://grpc.io",
     "license": "BSD-3-Clause",
     "require": {
-      "php": ">=5.5.0",
-      "google/protobuf": "^v3.3.0"
+      "php": ">=5.5.0"
     },
     "require-dev": {
       "google/auth": "v0.9"
     },
+    "suggest": {
+      "ext-protobuf": "For better performance, install the protobuf C extension.",
+      "google/protobuf": "To get started using grpc quickly, install the native protobuf library."
+    },
     "autoload": {
       "psr-4": {
         "Grpc\\": "src/php/lib/Grpc/"
diff --git a/templates/config.m4.template b/templates/config.m4.template
index 13ff738..a6357b7 100644
--- a/templates/config.m4.template
+++ b/templates/config.m4.template
@@ -10,23 +10,21 @@
     PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/include)
     PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/src/php/ext/grpc)
     PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/boringssl/include)
-    PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/cares)
-    PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/cares/cares)
 
     LIBS="-lpthread $LIBS"
 
+    CFLAGS="-Wall -Werror -Wno-parentheses-equality -Wno-unused-value -std=c11"
+    CXXFLAGS="-std=c++11"
     GRPC_SHARED_LIBADD="-lpthread $GRPC_SHARED_LIBADD"
+    PHP_REQUIRE_CXX()
     PHP_ADD_LIBRARY(pthread)
-
     PHP_ADD_LIBRARY(dl,,GRPC_SHARED_LIBADD)
     PHP_ADD_LIBRARY(dl)
 
     case $host in
       *darwin*)
-        PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/cares/config_darwin)
         ;;
       *)
-        PHP_ADD_INCLUDE(PHP_EXT_SRCDIR()/third_party/cares/config_linux)
         PHP_ADD_LIBRARY(rt,,GRPC_SHARED_LIBADD)
         PHP_ADD_LIBRARY(rt)
         ;;
@@ -43,10 +41,9 @@
       % endfor
       % endif
       % endfor
-      , $ext_shared, , -Wall -Werror ${"\\"}
-      -Wno-parentheses-equality -Wno-unused-value -std=c11 ${"\\"}
-      -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN ${"\\"}
-      -D_HAS_EXCEPTIONS=0 -DNOMINMAX)
+      , $ext_shared, , -fvisibility=hidden ${"\\"}
+      -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN ${"\\"}
+      -D_HAS_EXCEPTIONS=0 -DNOMINMAX -DGRPC_ARES=0)
 
     PHP_ADD_BUILD_DIR($ext_builddir/src/php/ext/grpc)
   <%
diff --git a/templates/package.json.template b/templates/package.json.template
index 3bae8fd..551c25f 100644
--- a/templates/package.json.template
+++ b/templates/package.json.template
@@ -36,7 +36,7 @@
       "lodash": "^4.15.0",
       "nan": "^2.0.0",
       "node-pre-gyp": "^0.6.0",
-      "protobufjs": "^6.7.0"
+      "protobufjs": "^5.0.0"
     },
     "devDependencies": {
       "async": "^2.0.1",
diff --git a/templates/package.xml.template b/templates/package.xml.template
index 8655cfa..394b815 100644
--- a/templates/package.xml.template
+++ b/templates/package.xml.template
@@ -12,7 +12,7 @@
     <email>grpc-packages@google.com</email>
     <active>yes</active>
    </lead>
-   <date>2017-03-01</date>
+   <date>2017-05-05</date>
    <time>16:06:07</time>
    <version>
     <release>${settings.php_version.php()}</release>
@@ -24,8 +24,7 @@
    </stability>
    <license>BSD</license>
    <notes>
-  - Added arg info macros #9751
-  - Updated codegen to be consistent with protobuf #9492
+  - Fixed some memory leaks #9559, #10996
    </notes>
    <contents>
     <dir baseinstalldir="/" name="/">
@@ -43,6 +42,7 @@
       % endfor
       % endif
       % endfor
+      <file name="LICENSE" role="doc" />
     </dir>
    </contents>
    <dependencies>
@@ -358,5 +358,21 @@
   - Updated codegen to be consistent with protobuf #9492
      </notes>
     </release>
+    <release>
+     <version>
+      <release>1.2.0</release>
+      <api>1.2.0</api>
+     </version>
+     <stability>
+      <release>stable</release>
+      <api>stable</api>
+     </stability>
+     <date>2017-03-20</date>
+     <license>BSD</license>
+     <notes>
+  - Added arg info macros #9751
+  - Updated codegen to be consistent with protobuf #9492
+     </notes>
+    </release>
    </changelog>
   </package>
diff --git a/templates/src/csharp/Grpc.Core/Version.csproj.include.template b/templates/src/csharp/Grpc.Core/Version.csproj.include.template
index 30b8d26..5bc66e9 100755
--- a/templates/src/csharp/Grpc.Core/Version.csproj.include.template
+++ b/templates/src/csharp/Grpc.Core/Version.csproj.include.template
@@ -4,6 +4,6 @@
   <Project>
     <PropertyGroup>
       <GrpcCsharpVersion>${settings.csharp_version}</GrpcCsharpVersion>
-      <GoogleProtobufVersion>3.2.0</GoogleProtobufVersion>
+      <GoogleProtobufVersion>3.3.0</GoogleProtobufVersion>
     </PropertyGroup>
   </Project>
diff --git a/templates/src/csharp/build_packages_dotnetcli.bat.template b/templates/src/csharp/build_packages_dotnetcli.bat.template
index 91808e0..8624c34 100755
--- a/templates/src/csharp/build_packages_dotnetcli.bat.template
+++ b/templates/src/csharp/build_packages_dotnetcli.bat.template
@@ -38,35 +38,26 @@
   
   set -ex
   
-  mkdir -p ..\..\artifacts${"\\"}
+  mkdir ..\..\artifacts
   
   @rem Collect the artifacts built by the previous build step if running on Jenkins
-  @rem TODO(jtattermusch): is there a better way to do this?
-  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=windows\artifacts\* nativelibs\windows_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=windows\artifacts\* nativelibs\windows_x64${"\\"}
-  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=linux\artifacts\* nativelibs\linux_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=linux\artifacts\* nativelibs\linux_x64${"\\"}
-  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=macos\artifacts\* nativelibs\macosx_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=macos\artifacts\* nativelibs\macosx_x64${"\\"}
+  mkdir nativelibs
+  powershell -Command "cp -r ..\..\platform=*\artifacts\csharp_ext_* nativelibs"
   
   @rem Collect protoc artifacts built by the previous build step
-  xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=windows\artifacts\* protoc_plugins\windows_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=windows\artifacts\* protoc_plugins\windows_x64${"\\"}
-  xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=linux\artifacts\* protoc_plugins\linux_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=linux\artifacts\* protoc_plugins\linux_x64${"\\"}
-  xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=macos\artifacts\* protoc_plugins\macosx_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=macos\artifacts\* protoc_plugins\macosx_x64${"\\"}
+  mkdir protoc_plugins
+  powershell -Command "cp -r ..\..\platform=*\artifacts\protoc_* protoc_plugins"
   
   %%DOTNET% restore Grpc.sln || goto :error
   
   @rem To be able to build, we also need to put grpc_csharp_ext to its normal location
-  xcopy /Y /I nativelibs\windows_x64\grpc_csharp_ext.dll ..\..\cmake\build\x64\Release${"\\"}
+  xcopy /Y /I nativelibs\csharp_ext_windows_x64\grpc_csharp_ext.dll ..\..\cmake\build\x64\Release${"\\"}
   
-  %%DOTNET% pack --configuration Release Grpc.Core --output ..\..\..\artifacts || goto :error
-  %%DOTNET% pack --configuration Release Grpc.Core.Testing --output ..\..\..\artifacts || goto :error
-  %%DOTNET% pack --configuration Release Grpc.Auth --output ..\..\..\artifacts || goto :error
-  %%DOTNET% pack --configuration Release Grpc.HealthCheck --output ..\..\..\artifacts || goto :error
-  %%DOTNET% pack --configuration Release Grpc.Reflection --output ..\..\..\artifacts || goto :error
+  %%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.Core --output ..\..\..\artifacts || goto :error
+  %%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.Core.Testing --output ..\..\..\artifacts || goto :error
+  %%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.Auth --output ..\..\..\artifacts || goto :error
+  %%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.HealthCheck --output ..\..\..\artifacts || goto :error
+  %%DOTNET% pack --configuration Release --include-symbols --include-source Grpc.Reflection --output ..\..\..\artifacts || goto :error
   
   %%NUGET% pack Grpc.nuspec -Version %VERSION% -OutputDirectory ..\..\artifacts || goto :error
   %%NUGET% pack Grpc.Tools.nuspec -Version %VERSION% -OutputDirectory ..\..\artifacts
diff --git a/templates/src/csharp/build_packages_dotnetcli.sh.template b/templates/src/csharp/build_packages_dotnetcli.sh.template
index 374b236..bff497c 100755
--- a/templates/src/csharp/build_packages_dotnetcli.sh.template
+++ b/templates/src/csharp/build_packages_dotnetcli.sh.template
@@ -36,41 +36,25 @@
   
   mkdir -p ../../artifacts/
   
-  mkdir -p nativelibs/windows_x86 nativelibs/windows_x64 ${"\\"}
-      nativelibs/linux_x86 nativelibs/linux_x64 ${"\\"}
-      nativelibs/macosx_x86 nativelibs/macosx_x64
-  
-  mkdir -p protoc_plugins/windows_x86 protoc_plugins/windows_x64 ${"\\"}
-      protoc_plugins/linux_x86 protoc_plugins/linux_x64 ${"\\"}
-      protoc_plugins/macosx_x86 protoc_plugins/macosx_x64
-  
-  # Collect the artifacts built by the previous build step if running on Jenkins
-  cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=windows/artifacts/* nativelibs/windows_x86 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=windows/artifacts/* nativelibs/windows_x64 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=linux/artifacts/* nativelibs/linux_x86 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=linux/artifacts/* nativelibs/linux_x64 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=macos/artifacts/* nativelibs/macosx_x86 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=macos/artifacts/* nativelibs/macosx_x64 || true
+  # Collect the artifacts built by the previous build step
+  mkdir -p nativelibs
+  cp -r $EXTERNAL_GIT_ROOT/platform={windows,linux,macos}/artifacts/csharp_ext_* nativelibs || true
   
   # Collect protoc artifacts built by the previous build step
-  cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=windows/artifacts/* protoc_plugins/windows_x86 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=windows/artifacts/* protoc_plugins/windows_x64 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=linux/artifacts/* protoc_plugins/linux_x86 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=linux/artifacts/* protoc_plugins/linux_x64 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=macos/artifacts/* protoc_plugins/macosx_x86 || true
-  cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=macos/artifacts/* protoc_plugins/macosx_x64 || true
+  mkdir -p protoc_plugins
+  cp -r $EXTERNAL_GIT_ROOT/platform={windows,linux,macos}/artifacts/protoc_* protoc_plugins || true
   
   dotnet restore Grpc.sln
   
   # To be able to build, we also need to put grpc_csharp_ext to its normal location
   mkdir -p ../../libs/opt
-  cp nativelibs/linux_x64/libgrpc_csharp_ext.so ../../libs/opt
+  cp nativelibs/csharp_ext_linux_x64/libgrpc_csharp_ext.so ../../libs/opt
   
-  dotnet pack --configuration Release Grpc.Core --output ../../../artifacts
-  dotnet pack --configuration Release Grpc.Core.Testing --output ../../../artifacts
-  dotnet pack --configuration Release Grpc.Auth --output ../../../artifacts
-  dotnet pack --configuration Release Grpc.HealthCheck --output ../../../artifacts
-  dotnet pack --configuration Release Grpc.Reflection --output ../../../artifacts
+  dotnet pack --configuration Release --include-symbols --include-source Grpc.Core --output ../../../artifacts
+  dotnet pack --configuration Release --include-symbols --include-source Grpc.Core.Testing --output ../../../artifacts
+  dotnet pack --configuration Release --include-symbols --include-source Grpc.Auth --output ../../../artifacts
+  dotnet pack --configuration Release --include-symbols --include-source Grpc.HealthCheck --output ../../../artifacts
+  dotnet pack --configuration Release --include-symbols --include-source Grpc.Reflection --output ../../../artifacts
   
   nuget pack Grpc.nuspec -Version "${settings.csharp_version}" -OutputDirectory ../../artifacts
   nuget pack Grpc.Tools.nuspec -Version "${settings.csharp_version}" -OutputDirectory ../../artifacts
diff --git a/templates/src/php/ext/grpc/version.h.template b/templates/src/php/ext/grpc/version.h.template
new file mode 100644
index 0000000..828ea69
--- /dev/null
+++ b/templates/src/php/ext/grpc/version.h.template
@@ -0,0 +1,42 @@
+%YAML 1.2
+--- |
+  /*
+   *
+   * Copyright 2015, Google Inc.
+   * All rights reserved.
+   *
+   * Redistribution and use in source and binary forms, with or without
+   * modification, are permitted provided that the following conditions are
+   * met:
+   *
+   *     * Redistributions of source code must retain the above copyright
+   * notice, this list of conditions and the following disclaimer.
+   *     * Redistributions in binary form must reproduce the above
+   * copyright notice, this list of conditions and the following disclaimer
+   * in the documentation and/or other materials provided with the
+   * distribution.
+   *     * Neither the name of Google Inc. nor the names of its
+   * contributors may be used to endorse or promote products derived from
+   * this software without specific prior written permission.
+   *
+   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+   *
+   */
+
+
+  #ifndef VERSION_H
+  #define VERSION_H
+
+  #define PHP_GRPC_VERSION "${settings.php_version.php_composer()}"
+
+  #endif /* VERSION_H */
diff --git a/templates/vsprojects/protoc.props.template b/templates/vsprojects/protoc.props.template
index 2c3844a..65771fc 100644
--- a/templates/vsprojects/protoc.props.template
+++ b/templates/vsprojects/protoc.props.template
@@ -5,7 +5,7 @@
   <PropertyGroup />

   <ItemDefinitionGroup>

     <ClCompile>

-      <DisableSpecificWarnings>4244;4267;%(DisableSpecificWarnings)</DisableSpecificWarnings>

+      <DisableSpecificWarnings>4244;4267;4800;%(DisableSpecificWarnings)</DisableSpecificWarnings>

     </ClCompile>

     <Link>

       <AdditionalDependencies>libprotoc.lib;%(AdditionalDependencies)</AdditionalDependencies>

diff --git a/test/core/bad_client/BUILD b/test/core/bad_client/BUILD
index 6b06955..bcfd2f1 100644
--- a/test/core/bad_client/BUILD
+++ b/test/core/bad_client/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load(":generate_tests.bzl", "grpc_bad_client_tests")
diff --git a/test/core/bad_client/tests/large_metadata.c b/test/core/bad_client/tests/large_metadata.c
index d7a3ce9..5f3a9c9 100644
--- a/test/core/bad_client/tests/large_metadata.c
+++ b/test/core/bad_client/tests/large_metadata.c
@@ -212,12 +212,14 @@
 }
 
 int main(int argc, char **argv) {
+  int i;
+
   grpc_test_init(argc, argv);
 
   // Test sending more metadata than the server will accept.
   gpr_strvec headers;
   gpr_strvec_init(&headers);
-  for (int i = 0; i < NUM_HEADERS; ++i) {
+  for (i = 0; i < NUM_HEADERS; ++i) {
     char *str;
     gpr_asprintf(&str, "%s%02d%s",
                  PFX_TOO_MUCH_METADATA_FROM_CLIENT_HEADER_START_STR, i,
diff --git a/test/core/bad_ssl/BUILD b/test/core/bad_ssl/BUILD
index 288788a..61c634a 100644
--- a/test/core/bad_ssl/BUILD
+++ b/test/core/bad_ssl/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load(":generate_tests.bzl", "grpc_bad_ssl_tests")
diff --git a/test/core/census/BUILD b/test/core/census/BUILD
index 49680ab..3fdf511 100644
--- a/test/core/census/BUILD
+++ b/test/core/census/BUILD
@@ -27,12 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "context_test",
     srcs = ["context_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -41,10 +43,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "mlog_test",
     srcs = ["mlog_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -53,10 +55,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "resource_test",
     srcs = ["resource_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     data = [
         ":data/resource_empty_name.pb",
         ":data/resource_full.pb",
@@ -73,10 +75,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "trace_context_test",
     srcs = ["trace_context_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     data = [
         ":data/context_empty.pb",
         ":data/context_full.pb",
diff --git a/test/core/channel/BUILD b/test/core/channel/BUILD
index c659046..5e7e8c1 100644
--- a/test/core/channel/BUILD
+++ b/test/core/channel/BUILD
@@ -27,12 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "channel_args_test",
     srcs = ["channel_args_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -41,10 +43,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "channel_stack_test",
     srcs = ["channel_stack_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
diff --git a/test/core/client_channel/BUILD b/test/core/client_channel/BUILD
index 55a74c6..6c4b40e 100644
--- a/test/core/client_channel/BUILD
+++ b/test/core/client_channel/BUILD
@@ -27,21 +27,33 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
 grpc_fuzzer(
-  name = "uri_fuzzer_test",
-  srcs = ["uri_fuzzer_test.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "uri_corpus",
-  copts = ["-std=c99"],
+    name = "uri_fuzzer_test",
+    srcs = ["uri_fuzzer_test.c"],
+    language = "C",
+    corpus = "uri_corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "lb_policies_test",
     srcs = ["lb_policies_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/end2end:cq_verifier"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:cq_verifier",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/client_channel/resolvers/BUILD b/test/core/client_channel/resolvers/BUILD
index e8361cd..80ca7d3 100644
--- a/test/core/client_channel/resolvers/BUILD
+++ b/test/core/client_channel/resolvers/BUILD
@@ -27,12 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "dns_resolver_connectivity_test",
     srcs = ["dns_resolver_connectivity_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -41,10 +43,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "dns_resolver_test",
     srcs = ["dns_resolver_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -53,10 +55,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "sockaddr_resolver_test",
     srcs = ["sockaddr_resolver_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -65,10 +67,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "fake_resolver_test",
     srcs = ["fake_resolver_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
diff --git a/test/core/compression/BUILD b/test/core/compression/BUILD
index 9ddb4c5..bbd66bd 100644
--- a/test/core/compression/BUILD
+++ b/test/core/compression/BUILD
@@ -27,12 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "algorithm_test",
     srcs = ["algorithm_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -41,10 +43,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "compression_test",
     srcs = ["compression_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -53,10 +55,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "message_compress_test",
     srcs = ["message_compress_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
diff --git a/test/core/end2end/BUILD b/test/core/end2end/BUILD
index ffea1cc..cf387a9 100644
--- a/test/core/end2end/BUILD
+++ b/test/core/end2end/BUILD
@@ -27,15 +27,17 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load(":generate_tests.bzl", "grpc_end2end_tests")
 
-cc_library(
+grpc_cc_library(
     name = "cq_verifier",
     srcs = ["cq_verifier.c"],
     hdrs = ["cq_verifier.h"],
-    copts = ["-std=c99"],
+    language = "C",
     visibility = ["//test:__subpackages__"],
     deps = [
         "//:gpr",
@@ -44,7 +46,7 @@
     ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "ssl_test_data",
     srcs = [
         "data/client_certs.c",
@@ -53,15 +55,15 @@
         "data/test_root_cert.c",
     ],
     hdrs = ["data/ssl_test_data.h"],
-    copts = ["-std=c99"],
+    language = "C",
     visibility = ["//test:__subpackages__"],
 )
 
-cc_library(
+grpc_cc_library(
     name = "fake_resolver",
     srcs = ["fake_resolver.c"],
     hdrs = ["fake_resolver.h"],
-    copts = ["-std=c99"],
+    language = "C",
     visibility = ["//test:__subpackages__"],
     deps = [
         "//:gpr",
@@ -70,11 +72,11 @@
     ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "http_proxy",
     srcs = ["fixtures/http_proxy_fixture.c"],
     hdrs = ["fixtures/http_proxy_fixture.h"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -82,11 +84,11 @@
     ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "proxy",
     srcs = ["fixtures/proxy.c"],
     hdrs = ["fixtures/proxy.h"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
diff --git a/test/core/end2end/end2end_nosec_tests.c b/test/core/end2end/end2end_nosec_tests.c
index 1187e59..4f0d11c 100644
--- a/test/core/end2end/end2end_nosec_tests.c
+++ b/test/core/end2end/end2end_nosec_tests.c
@@ -145,6 +145,8 @@
 extern void streaming_error_response_pre_init(void);
 extern void trailing_metadata(grpc_end2end_test_config config);
 extern void trailing_metadata_pre_init(void);
+extern void workaround_cronet_compression(grpc_end2end_test_config config);
+extern void workaround_cronet_compression_pre_init(void);
 extern void write_buffering(grpc_end2end_test_config config);
 extern void write_buffering_pre_init(void);
 extern void write_buffering_at_end(grpc_end2end_test_config config);
@@ -204,6 +206,7 @@
   simple_request_pre_init();
   streaming_error_response_pre_init();
   trailing_metadata_pre_init();
+  workaround_cronet_compression_pre_init();
   write_buffering_pre_init();
   write_buffering_at_end_pre_init();
 }
@@ -265,6 +268,7 @@
     simple_request(config);
     streaming_error_response(config);
     trailing_metadata(config);
+    workaround_cronet_compression(config);
     write_buffering(config);
     write_buffering_at_end(config);
     return;
@@ -471,6 +475,10 @@
       trailing_metadata(config);
       continue;
     }
+    if (0 == strcmp("workaround_cronet_compression", argv[i])) {
+      workaround_cronet_compression(config);
+      continue;
+    }
     if (0 == strcmp("write_buffering", argv[i])) {
       write_buffering(config);
       continue;
diff --git a/test/core/end2end/end2end_tests.c b/test/core/end2end/end2end_tests.c
index 966031a..9123d97 100644
--- a/test/core/end2end/end2end_tests.c
+++ b/test/core/end2end/end2end_tests.c
@@ -147,6 +147,8 @@
 extern void streaming_error_response_pre_init(void);
 extern void trailing_metadata(grpc_end2end_test_config config);
 extern void trailing_metadata_pre_init(void);
+extern void workaround_cronet_compression(grpc_end2end_test_config config);
+extern void workaround_cronet_compression_pre_init(void);
 extern void write_buffering(grpc_end2end_test_config config);
 extern void write_buffering_pre_init(void);
 extern void write_buffering_at_end(grpc_end2end_test_config config);
@@ -207,6 +209,7 @@
   simple_request_pre_init();
   streaming_error_response_pre_init();
   trailing_metadata_pre_init();
+  workaround_cronet_compression_pre_init();
   write_buffering_pre_init();
   write_buffering_at_end_pre_init();
 }
@@ -269,6 +272,7 @@
     simple_request(config);
     streaming_error_response(config);
     trailing_metadata(config);
+    workaround_cronet_compression(config);
     write_buffering(config);
     write_buffering_at_end(config);
     return;
@@ -479,6 +483,10 @@
       trailing_metadata(config);
       continue;
     }
+    if (0 == strcmp("workaround_cronet_compression", argv[i])) {
+      workaround_cronet_compression(config);
+      continue;
+    }
     if (0 == strcmp("write_buffering", argv[i])) {
       write_buffering(config);
       continue;
diff --git a/test/core/end2end/end2end_tests.h b/test/core/end2end/end2end_tests.h
index 4d98bdd..59eab9e 100644
--- a/test/core/end2end/end2end_tests.h
+++ b/test/core/end2end/end2end_tests.h
@@ -48,6 +48,7 @@
 #define FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER 32
 #define FEATURE_MASK_DOES_NOT_SUPPORT_RESOURCE_QUOTA_SERVER 64
 #define FEATURE_MASK_DOES_NOT_SUPPORT_NETWORK_STATUS_CHANGE 128
+#define FEATURE_MASK_SUPPORTS_WORKAROUNDS 256
 
 #define FAIL_AUTH_CHECK_SERVER_ARG_NAME "fail_auth_check"
 
diff --git a/test/core/end2end/fixtures/h2_full+workarounds.c b/test/core/end2end/fixtures/h2_full+workarounds.c
new file mode 100644
index 0000000..2e9264f
--- /dev/null
+++ b/test/core/end2end/fixtures/h2_full+workarounds.c
@@ -0,0 +1,137 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/useful.h>
+#include <grpc/support/workaround_list.h>
+#include "src/core/ext/filters/client_channel/client_channel.h"
+#include "src/core/ext/filters/http/server/http_server_filter.h"
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/channel/connected_channel.h"
+#include "src/core/lib/surface/channel.h"
+#include "src/core/lib/surface/server.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+static char *workarounds_arg[GRPC_MAX_WORKAROUND_ID] = {
+    GRPC_ARG_WORKAROUND_CRONET_COMPRESSION};
+
+typedef struct fullstack_fixture_data {
+  char *localaddr;
+} fullstack_fixture_data;
+
+static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
+    grpc_channel_args *client_args, grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  int port = grpc_pick_unused_port_or_die();
+  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  memset(&f, 0, sizeof(f));
+
+  gpr_join_host_port(&ffd->localaddr, "localhost", port);
+
+  f.fixture_data = ffd;
+  f.cq = grpc_completion_queue_create_for_next(NULL);
+  f.shutdown_cq = grpc_completion_queue_create_for_pluck(NULL);
+
+  return f;
+}
+
+void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
+                                  grpc_channel_args *client_args) {
+  fullstack_fixture_data *ffd = f->fixture_data;
+  f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
+  GPR_ASSERT(f->client);
+}
+
+void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
+                                  grpc_channel_args *server_args) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  fullstack_fixture_data *ffd = f->fixture_data;
+  grpc_arg args[GRPC_MAX_WORKAROUND_ID];
+  for (uint32_t i = 0; i < GRPC_MAX_WORKAROUND_ID; i++) {
+    args[i].key = workarounds_arg[i];
+    args[i].type = GRPC_ARG_INTEGER;
+    args[i].value.integer = 1;
+  }
+  grpc_channel_args *server_args_new =
+      grpc_channel_args_copy_and_add(server_args, args, GRPC_MAX_WORKAROUND_ID);
+  if (f->server) {
+    grpc_server_destroy(f->server);
+  }
+  f->server = grpc_server_create(server_args_new, NULL);
+  grpc_server_register_completion_queue(f->server, f->cq, NULL);
+  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);
+}
+
+void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
+  fullstack_fixture_data *ffd = f->fixture_data;
+  gpr_free(ffd->localaddr);
+  gpr_free(ffd);
+}
+
+/* All test configurations */
+static grpc_end2end_test_config configs[] = {
+    {"chttp2/fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
+                             FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL |
+                             FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER |
+                             FEATURE_MASK_SUPPORTS_WORKAROUNDS,
+     chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
+     chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
+};
+
+int main(int argc, char **argv) {
+  size_t i;
+
+  grpc_test_init(argc, argv);
+  grpc_end2end_tests_pre_init();
+  grpc_init();
+
+  for (i = 0; i < sizeof(configs) / sizeof(*configs); i++) {
+    grpc_end2end_tests(argc, argv, configs[i]);
+  }
+
+  grpc_shutdown();
+
+  return 0;
+}
diff --git a/test/core/end2end/fuzzers/BUILD b/test/core/end2end/fuzzers/BUILD
index 4d98aa0..55810bd 100644
--- a/test/core/end2end/fuzzers/BUILD
+++ b/test/core/end2end/fuzzers/BUILD
@@ -27,30 +27,45 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
 grpc_fuzzer(
-  name = "api_fuzzer",
-  srcs = ["api_fuzzer.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util", "//test/core/end2end:ssl_test_data"],
-  corpus = "api_fuzzer_corpus",
-  copts = ["-std=c99"],
+    name = "api_fuzzer",
+    srcs = ["api_fuzzer.c"],
+    language = "C",
+    corpus = "api_fuzzer_corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
 grpc_fuzzer(
-  name = "client_fuzzer",
-  srcs = ["client_fuzzer.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "client_fuzzer_corpus",
-  copts = ["-std=c99"],
+    name = "client_fuzzer",
+    srcs = ["client_fuzzer.c"],
+    language = "C",
+    corpus = "client_fuzzer_corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
 grpc_fuzzer(
-  name = "server_fuzzer",
-  srcs = ["server_fuzzer.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "server_fuzzer_corpus",
-  copts = ["-std=c99"],
+    name = "server_fuzzer",
+    srcs = ["server_fuzzer.c"],
+    language = "C",
+    corpus = "server_fuzzer_corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index 48e5720..34b5938 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -60,6 +60,7 @@
     'h2_full+pipe': default_unsecure_fixture_options._replace(
         platforms=['linux'], exclude_iomgrs=['uv']),
     'h2_full+trace': default_unsecure_fixture_options._replace(tracing=True),
+    'h2_full+workarounds': default_unsecure_fixture_options,
     'h2_http_proxy': default_unsecure_fixture_options._replace(
         ci_mac=False, exclude_iomgrs=['uv']),
     'h2_oauth2': default_secure_fixture_options._replace(
@@ -151,6 +152,7 @@
     'simple_request': default_test_options,
     'streaming_error_response': default_test_options._replace(cpu_cost=LOWCPU),
     'trailing_metadata': default_test_options,
+    'workaround_cronet_compression': default_test_options,
     'write_buffering': default_test_options._replace(cpu_cost=LOWCPU),
     'write_buffering_at_end': default_test_options._replace(cpu_cost=LOWCPU),
 }
diff --git a/test/core/end2end/generate_tests.bzl b/test/core/end2end/generate_tests.bzl
index e141578..6865aef 100755
--- a/test/core/end2end/generate_tests.bzl
+++ b/test/core/end2end/generate_tests.bzl
@@ -28,6 +28,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_sh_test", "grpc_cc_binary", "grpc_cc_library")
 
 """Generates the appropriate build.json data for all the end2end tests."""
 
@@ -56,6 +57,7 @@
     'h2_full': fixture_options(),
     'h2_full+pipe': fixture_options(platforms=['linux']),
     'h2_full+trace': fixture_options(tracing=True),
+    'h2_full+workarounds': fixture_options(),
     'h2_http_proxy': fixture_options(),
     'h2_oauth2': fixture_options(),
     'h2_proxy': fixture_options(includes_proxy=True),
@@ -135,6 +137,7 @@
     'trailing_metadata': test_options(),
     'authority_not_supported': test_options(),
     'filter_latency': test_options(),
+    'workaround_cronet_compression': test_options(),
     'write_buffering': test_options(),
     'write_buffering_at_end': test_options(),
 }
@@ -157,7 +160,7 @@
 
 
 def grpc_end2end_tests():
-  native.cc_library(
+  grpc_cc_library(
     name = 'end2end_tests',
     srcs = ['end2end_tests.c', 'end2end_test_utils.c'] + [
              'tests/%s.c' % t
@@ -166,31 +169,33 @@
       'tests/cancel_test_helpers.h',
       'end2end_tests.h'
     ],
-    copts = ['-std=c99'],
+    language = "C",
     deps = [
       ':cq_verifier',
       ':ssl_test_data',
       ':fake_resolver',
       ':http_proxy',
       ':proxy',
-      '//test/core/util:grpc_test_util',
-      '//:grpc',
-      '//test/core/util:gpr_test_util',
-      '//:gpr',
     ]
   )
 
   for f, fopt in END2END_FIXTURES.items():
-    native.cc_binary(
+    grpc_cc_binary(
       name = '%s_test' % f,
       srcs = ['fixtures/%s.c' % f],
-      copts = ['-std=c99'],
-      deps = [':end2end_tests']
+      language = "C",
+      deps = [
+        ':end2end_tests',
+        '//test/core/util:grpc_test_util',
+        '//:grpc',
+        '//test/core/util:gpr_test_util',
+        '//:gpr',
+      ],
     )
     for t, topt in END2END_TESTS.items():
       #print(compatible(fopt, topt), f, t, fopt, topt)
       if not compatible(fopt, topt): continue
-      native.sh_test(
+      grpc_sh_test(
         name = '%s_test@%s' % (f, t),
         srcs = ['end2end_test.sh'],
         args = ['$(location %s_test)' % f, t],
diff --git a/test/core/end2end/tests/workaround_cronet_compression.c b/test/core/end2end/tests/workaround_cronet_compression.c
new file mode 100644
index 0000000..f8ce8c5
--- /dev/null
+++ b/test/core/end2end/tests/workaround_cronet_compression.c
@@ -0,0 +1,411 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/byte_buffer.h>
+#include <grpc/byte_buffer_reader.h>
+#include <grpc/compression.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/surface/call.h"
+#include "src/core/lib/surface/call_test_only.h"
+#include "src/core/lib/transport/static_metadata.h"
+#include "test/core/end2end/cq_verifier.h"
+
+static void *tag(intptr_t t) { return (void *)t; }
+
+static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
+                                            const char *test_name,
+                                            grpc_channel_args *client_args,
+                                            grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
+  f = config.create_fixture(client_args, server_args);
+  config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
+  return f;
+}
+
+static gpr_timespec n_seconds_from_now(int n) {
+  return grpc_timeout_seconds_to_deadline(n);
+}
+
+static gpr_timespec five_seconds_from_now(void) {
+  return n_seconds_from_now(5);
+}
+
+static void drain_cq(grpc_completion_queue *cq) {
+  grpc_event ev;
+  do {
+    ev = grpc_completion_queue_next(cq, five_seconds_from_now(), NULL);
+  } while (ev.type != GRPC_QUEUE_SHUTDOWN);
+}
+
+static void shutdown_server(grpc_end2end_test_fixture *f) {
+  if (!f->server) return;
+  grpc_server_shutdown_and_notify(f->server, f->shutdown_cq, tag(1000));
+  GPR_ASSERT(grpc_completion_queue_pluck(f->shutdown_cq, tag(1000),
+                                         grpc_timeout_seconds_to_deadline(5),
+                                         NULL)
+                 .type == GRPC_OP_COMPLETE);
+  grpc_server_destroy(f->server);
+  f->server = NULL;
+}
+
+static void shutdown_client(grpc_end2end_test_fixture *f) {
+  if (!f->client) return;
+  grpc_channel_destroy(f->client);
+  f->client = NULL;
+}
+
+static void end_test(grpc_end2end_test_fixture *f) {
+  shutdown_server(f);
+  shutdown_client(f);
+
+  grpc_completion_queue_shutdown(f->cq);
+  drain_cq(f->cq);
+  grpc_completion_queue_destroy(f->cq);
+  grpc_completion_queue_destroy(f->shutdown_cq);
+}
+
+static void request_with_payload_template(
+    grpc_end2end_test_config config, const char *test_name,
+    uint32_t client_send_flags_bitmask,
+    grpc_compression_algorithm default_client_channel_compression_algorithm,
+    grpc_compression_algorithm default_server_channel_compression_algorithm,
+    grpc_compression_algorithm expected_algorithm_from_client,
+    grpc_compression_algorithm expected_algorithm_from_server,
+    grpc_metadata *client_init_metadata, bool set_server_level,
+    grpc_compression_level server_compression_level,
+    char *user_agent_override) {
+  grpc_call *c;
+  grpc_call *s;
+  grpc_slice request_payload_slice;
+  grpc_byte_buffer *request_payload;
+  grpc_channel_args *client_args;
+  grpc_channel_args *server_args;
+  grpc_end2end_test_fixture f;
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_byte_buffer *request_payload_recv = NULL;
+  grpc_byte_buffer *response_payload;
+  grpc_byte_buffer *response_payload_recv;
+  grpc_call_details call_details;
+  grpc_status_code status;
+  grpc_call_error error;
+  grpc_slice details;
+  int was_cancelled = 2;
+  cq_verifier *cqv;
+  char request_str[1024];
+  char response_str[1024];
+
+  memset(request_str, 'x', 1023);
+  request_str[1023] = '\0';
+
+  memset(response_str, 'y', 1023);
+  response_str[1023] = '\0';
+
+  request_payload_slice = grpc_slice_from_copied_string(request_str);
+  grpc_slice response_payload_slice =
+      grpc_slice_from_copied_string(response_str);
+
+  client_args = grpc_channel_args_set_compression_algorithm(
+      NULL, default_client_channel_compression_algorithm);
+  server_args = grpc_channel_args_set_compression_algorithm(
+      NULL, default_server_channel_compression_algorithm);
+
+  if (user_agent_override) {
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_channel_args *client_args_old = client_args;
+    grpc_arg arg;
+    arg.key = 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);
+  }
+
+  f = begin_test(config, test_name, client_args, server_args);
+  cqv = cq_verifier_create(f.cq);
+
+  gpr_timespec deadline = five_seconds_from_now();
+  c = grpc_channel_create_call(
+      f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+      grpc_slice_from_static_string("/foo"),
+      get_host_override_slice("foo.test.google.fr:1234", config), deadline,
+      NULL);
+  GPR_ASSERT(c);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  if (client_init_metadata != NULL) {
+    op->data.send_initial_metadata.count = 1;
+    op->data.send_initial_metadata.metadata = client_init_metadata;
+  } else {
+    op->data.send_initial_metadata.count = 0;
+  }
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  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 = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  error =
+      grpc_server_request_call(f.server, &s, &call_details,
+                               &request_metadata_recv, f.cq, f.cq, tag(100));
+  GPR_ASSERT(GRPC_CALL_OK == error);
+  CQ_EXPECT_COMPLETION(cqv, tag(100), true);
+  cq_verify(cqv);
+
+  GPR_ASSERT(GPR_BITCOUNT(grpc_call_test_only_get_encodings_accepted_by_peer(
+                 s)) == GRPC_COMPRESS_ALGORITHMS_COUNT);
+  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
+                        GRPC_COMPRESS_NONE) != 0);
+  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
+                        GRPC_COMPRESS_DEFLATE) != 0);
+  GPR_ASSERT(GPR_BITGET(grpc_call_test_only_get_encodings_accepted_by_peer(s),
+                        GRPC_COMPRESS_GZIP) != 0);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  if (set_server_level) {
+    op->data.send_initial_metadata.maybe_compression_level.is_set = true;
+    op->data.send_initial_metadata.maybe_compression_level.level =
+        server_compression_level;
+  }
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(101), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  for (int i = 0; i < 2; i++) {
+    request_payload = grpc_raw_byte_buffer_create(&request_payload_slice, 1);
+    response_payload = grpc_raw_byte_buffer_create(&response_payload_slice, 1);
+
+    memset(ops, 0, sizeof(ops));
+    op = ops;
+    op->op = GRPC_OP_SEND_MESSAGE;
+    op->data.send_message.send_message = request_payload;
+    op->flags = client_send_flags_bitmask;
+    op->reserved = NULL;
+    op++;
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->data.recv_message.recv_message = &response_payload_recv;
+    op->flags = 0;
+    op->reserved = NULL;
+    op++;
+    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+
+    memset(ops, 0, sizeof(ops));
+    op = ops;
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->data.recv_message.recv_message = &request_payload_recv;
+    op->flags = 0;
+    op->reserved = NULL;
+    op++;
+    error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+    CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
+    cq_verify(cqv);
+
+    GPR_ASSERT(request_payload_recv->type == GRPC_BB_RAW);
+    GPR_ASSERT(byte_buffer_eq_string(request_payload_recv, request_str));
+    GPR_ASSERT(request_payload_recv->data.raw.compression ==
+               expected_algorithm_from_client);
+
+    memset(ops, 0, sizeof(ops));
+    op = ops;
+    op->op = GRPC_OP_SEND_MESSAGE;
+    op->data.send_message.send_message = response_payload;
+    op->flags = 0;
+    op->reserved = NULL;
+    op++;
+    error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+    CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
+    CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
+    cq_verify(cqv);
+
+    GPR_ASSERT(response_payload_recv->type == GRPC_BB_RAW);
+    GPR_ASSERT(byte_buffer_eq_string(response_payload_recv, response_str));
+    if (server_compression_level > GRPC_COMPRESS_LEVEL_NONE) {
+      const grpc_compression_algorithm algo_for_server_level =
+          grpc_call_compression_for_level(s, server_compression_level);
+      GPR_ASSERT(response_payload_recv->data.raw.compression ==
+                 algo_for_server_level);
+    } else {
+      GPR_ASSERT(response_payload_recv->data.raw.compression ==
+                 expected_algorithm_from_server);
+    }
+
+    grpc_byte_buffer_destroy(request_payload);
+    grpc_byte_buffer_destroy(response_payload);
+    grpc_byte_buffer_destroy(request_payload_recv);
+    grpc_byte_buffer_destroy(response_payload_recv);
+  }
+
+  grpc_slice_unref(request_payload_slice);
+  grpc_slice_unref(response_payload_slice);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_OK;
+  grpc_slice status_details = grpc_slice_from_static_string("xyz");
+  op->data.send_status_from_server.status_details = &status_details;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(3), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
+  CQ_EXPECT_COMPLETION(cqv, tag(104), 1);
+  cq_verify(cqv);
+
+  GPR_ASSERT(status == GRPC_STATUS_OK);
+  GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
+  GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/foo"));
+  validate_host_override_string("foo.test.google.fr:1234", call_details.host,
+                                config);
+  GPR_ASSERT(was_cancelled == 0);
+
+  grpc_slice_unref(details);
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  grpc_call_unref(c);
+  grpc_call_unref(s);
+
+  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);
+  }
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+typedef struct workaround_cronet_compression_config {
+  char *user_agent_override;
+  grpc_compression_algorithm expected_algorithm_from_server;
+} workaround_cronet_compression_config;
+
+static workaround_cronet_compression_config workaround_configs[] = {
+    {NULL, GRPC_COMPRESS_GZIP},
+    {"grpc-objc/1.3.0-dev grpc-c/3.0.0-dev (ios; cronet_http; gentle)",
+     GRPC_COMPRESS_NONE},
+    {"grpc-objc/1.3.0-dev grpc-c/3.0.0-dev (ios; chttp2; gentle)",
+     GRPC_COMPRESS_GZIP},
+    {"grpc-objc/1.4.0 grpc-c/3.0.0-dev (ios; cronet_http; gentle)",
+     GRPC_COMPRESS_GZIP}};
+static const size_t workaround_configs_num =
+    sizeof(workaround_configs) / sizeof(*workaround_configs);
+
+static void test_workaround_cronet_compression(
+    grpc_end2end_test_config config) {
+  for (uint32_t i = 0; i < workaround_configs_num; i++) {
+    request_with_payload_template(
+        config, "test_invoke_request_with_compressed_payload", 0,
+        GRPC_COMPRESS_GZIP, GRPC_COMPRESS_GZIP, GRPC_COMPRESS_GZIP,
+        workaround_configs[i].expected_algorithm_from_server, NULL, false,
+        /* ignored */ GRPC_COMPRESS_LEVEL_NONE,
+        workaround_configs[i].user_agent_override);
+  }
+}
+
+void workaround_cronet_compression(grpc_end2end_test_config config) {
+  if (config.feature_mask & FEATURE_MASK_SUPPORTS_WORKAROUNDS) {
+    test_workaround_cronet_compression(config);
+  }
+}
+
+void workaround_cronet_compression_pre_init(void) {}
diff --git a/test/core/fling/BUILD b/test/core/fling/BUILD
index 0b0ebcb..8f17527 100644
--- a/test/core/fling/BUILD
+++ b/test/core/fling/BUILD
@@ -27,36 +27,68 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
-cc_binary(
+grpc_cc_binary(
     name = "client",
+    testonly = 1,
     srcs = ["client.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/end2end:ssl_test_data"],
-    testonly = 1,
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_binary(
+grpc_cc_binary(
     name = "server",
-    srcs = ["server.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/end2end:ssl_test_data"],
     testonly = 1,
-    copts = ['-std=c99']
+    srcs = ["server.c"],
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "fling",
     srcs = ["fling_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/end2end:ssl_test_data"],
-    data = [":client", ":server"]
+    data = [
+        ":client",
+        ":server",
+    ],
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "fling_stream",
     srcs = ["fling_stream_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/end2end:ssl_test_data"],
-    data = [":client", ":server"]
+    data = [
+        ":client",
+        ":server",
+    ],
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/handshake/BUILD b/test/core/handshake/BUILD
index 996b503..bdb91ea 100644
--- a/test/core/handshake/BUILD
+++ b/test/core/handshake/BUILD
@@ -27,12 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "client_ssl",
     srcs = ["client_ssl.c"],
-    copts = ["-std=c99"],
+    language = "C",
     data = [
         "//src/core/tsi/test_creds:ca.pem",
         "//src/core/tsi/test_creds:server1.key",
@@ -46,10 +48,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "server_ssl",
     srcs = ["server_ssl.c"],
-    copts = ["-std=c99"],
+    language = "C",
     data = [
         "//src/core/tsi/test_creds:ca.pem",
         "//src/core/tsi/test_creds:server1.key",
diff --git a/test/core/http/BUILD b/test/core/http/BUILD
index abfa759..9350dac 100644
--- a/test/core/http/BUILD
+++ b/test/core/http/BUILD
@@ -27,24 +27,34 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
 grpc_fuzzer(
-  name = "response_fuzzer",
-  srcs = ["response_fuzzer.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "response_corpus",
-  copts = ["-std=c99"],
+    name = "response_fuzzer",
+    srcs = ["response_fuzzer.c"],
+    language = "C",
+    corpus = "response_corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
 grpc_fuzzer(
-  name = "request_fuzzer",
-  srcs = ["request_fuzzer.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "request_corpus",
-  copts = ["-std=c99"],
+    name = "request_fuzzer",
+    srcs = ["request_fuzzer.c"],
+    language = "C",
+    corpus = "request_corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
 # Copyright 2017, Google Inc.
@@ -80,25 +90,43 @@
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
-cc_test(
+grpc_cc_test(
     name = "httpcli_test",
     srcs = ["httpcli_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/end2end:ssl_test_data"],
-    copts = ['-std=c99'],
-    data = ['test_server.py']
+    language = "C",
+    data = ["test_server.py"],
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "httpscli_test",
     srcs = ["httpscli_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/end2end:ssl_test_data"],
-    copts = ['-std=c99'],
-    data = ['test_server.py']
+    language = "C",
+    data = ["test_server.py"],
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "parser_test",
     srcs = ["parser_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/end2end:ssl_test_data"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/iomgr/BUILD b/test/core/iomgr/BUILD
index 808faf5..269ca94 100644
--- a/test/core/iomgr/BUILD
+++ b/test/core/iomgr/BUILD
@@ -27,155 +27,266 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
-cc_library(
+package(default_visibility = ["//visibility:public"]) # Useful for third party devs to test their io manager implementation.
+
+grpc_cc_library(
     name = "endpoint_tests",
     srcs = ["endpoint_tests.c"],
     hdrs = ["endpoint_tests.h"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
+    language = "C",
     visibility = ["//test:__subpackages__"],
-    copts = ['-std=c99']
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "combiner_test",
     srcs = ["combiner_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "endpoint_pair_test",
     srcs = ["endpoint_pair_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", ":endpoint_tests"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        ":endpoint_tests",
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "ev_epollsig_linux_test",
     srcs = ["ev_epollsig_linux_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
+    language = "C",
 )
 
-cc_test(
+grpc_cc_test(
     name = "fd_conservation_posix_test",
     srcs = ["fd_conservation_posix_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "fd_posix_test",
     srcs = ["fd_posix_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "load_file_test",
     srcs = ["load_file_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "pollset_set_test",
     srcs = ["pollset_set_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "resolve_address_posix_test",
     srcs = ["resolve_address_posix_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "resolve_address_test",
     srcs = ["resolve_address_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "resource_quota_test",
     srcs = ["resource_quota_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "sockaddr_utils_test",
     srcs = ["sockaddr_utils_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "socket_utils_test",
     srcs = ["socket_utils_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "tcp_client_posix_test",
     srcs = ["tcp_client_posix_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "tcp_posix_test",
     srcs = ["tcp_posix_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", ":endpoint_tests"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        ":endpoint_tests",
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "tcp_server_posix_test",
     srcs = ["tcp_server_posix_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "time_averaged_stats_test",
     srcs = ["time_averaged_stats_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "timer_heap_test",
     srcs = ["timer_heap_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "timer_list_test",
     srcs = ["timer_list_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "udp_server_test",
     srcs = ["udp_server_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "wakeup_fd_cv_test",
     srcs = ["wakeup_fd_cv_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/json/BUILD b/test/core/json/BUILD
index f5a877e..aba2e2c 100644
--- a/test/core/json/BUILD
+++ b/test/core/json/BUILD
@@ -27,44 +27,75 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
 grpc_fuzzer(
-  name = "json_fuzzer",
-  srcs = ["fuzzer.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "corpus",
-  copts = ["-std=c99"],
+    name = "json_fuzzer",
+    srcs = ["fuzzer.c"],
+    language = "C",
+    corpus = "corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_binary(
+grpc_cc_binary(
     name = "json_rewrite",
-    srcs = ["json_rewrite.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
     testonly = 1,
-    copts = ['-std=c99']
+    srcs = ["json_rewrite.c"],
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "json_rewrite_test",
     srcs = ["json_rewrite_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99'],
-    data = ["rewrite_test_input.json", "rewrite_test_output_condensed.json", "rewrite_test_output_indented.json", ":json_stream_error_test"]
+    language = "C",
+    data = [
+        "rewrite_test_input.json",
+        "rewrite_test_output_condensed.json",
+        "rewrite_test_output_indented.json",
+        ":json_stream_error_test",
+    ],
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "json_stream_error_test",
     srcs = ["json_stream_error_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "json_test",
     srcs = ["json_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/nanopb/BUILD b/test/core/nanopb/BUILD
index b02d750..33e9338 100644
--- a/test/core/nanopb/BUILD
+++ b/test/core/nanopb/BUILD
@@ -27,23 +27,32 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
 grpc_fuzzer(
-  name = "fuzzer_response",
-  srcs = ["fuzzer_response.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "corpus_response",
-  copts = ["-std=c99"],
+    name = "fuzzer_response",
+    srcs = ["fuzzer_response.c"],
+    language = "C",
+    corpus = "corpus_response",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
 grpc_fuzzer(
-  name = "fuzzer_serverlist",
-  srcs = ["fuzzer_serverlist.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "corpus_serverlist",
-  copts = ["-std=c99"],
+    name = "fuzzer_serverlist",
+    srcs = ["fuzzer_serverlist.c"],
+    language = "C",
+    corpus = "corpus_serverlist",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
-
diff --git a/test/core/network_benchmarks/BUILD b/test/core/network_benchmarks/BUILD
index a5209de..5c243f7 100644
--- a/test/core/network_benchmarks/BUILD
+++ b/test/core/network_benchmarks/BUILD
@@ -27,11 +27,18 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_binary(
+grpc_cc_binary(
     name = "low_level_ping_pong",
     srcs = ["low_level_ping_pong.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/security/BUILD b/test/core/security/BUILD
index a81e1d3..b2d8774 100644
--- a/test/core/security/BUILD
+++ b/test/core/security/BUILD
@@ -27,72 +27,110 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
 grpc_fuzzer(
-  name = "ssl_server_fuzzer",
-  srcs = ["ssl_server_fuzzer.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util", "//test/core/end2end:ssl_test_data"],
-  corpus = "corpus",
-  copts = ["-std=c99"],
+    name = "ssl_server_fuzzer",
+    srcs = ["ssl_server_fuzzer.c"],
+    language = "C",
+    corpus = "corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "oauth2_utils",
     srcs = ["oauth2_utils.c"],
     hdrs = ["oauth2_utils.h"],
+    language = "C",
     deps = ["//:grpc"],
-    copts = ['-std=c99'],
     visibility = ["//test/cpp:__subpackages__"],
 )
 
-cc_test(
+grpc_cc_test(
     name = "auth_context_test",
     srcs = ["auth_context_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "credentials_test",
     srcs = ["credentials_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "secure_endpoint_test",
     srcs = ["secure_endpoint_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util", "//test/core/iomgr:endpoint_tests"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/iomgr:endpoint_tests",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "security_connector_test",
     srcs = ["security_connector_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_binary(
+grpc_cc_binary(
     name = "create_jwt",
     srcs = ["create_jwt.c"],
-    deps = ["//:grpc", "//:gpr"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+    ],
 )
 
-cc_binary(
+grpc_cc_binary(
     name = "fetch_oauth2",
     srcs = ["fetch_oauth2.c"],
-    deps = ["//:grpc", "//:gpr", ":oauth2_utils"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        ":oauth2_utils",
+        "//:gpr",
+        "//:grpc",
+    ],
 )
 
-cc_binary(
+grpc_cc_binary(
     name = "verify_jwt",
     srcs = ["verify_jwt.c"],
-    deps = ["//:grpc", "//:gpr"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+    ],
 )
diff --git a/test/core/slice/BUILD b/test/core/slice/BUILD
index 18cf6f6..8dc34e7 100644
--- a/test/core/slice/BUILD
+++ b/test/core/slice/BUILD
@@ -27,56 +27,77 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
 grpc_fuzzer(
-  name = "percent_decode_fuzzer",
-  srcs = ["percent_decode_fuzzer.c"],
-  deps = ["//:gpr", "//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "response_corpus",
-  copts = ["-std=c99"],
+    name = "percent_decode_fuzzer",
+    srcs = ["percent_decode_fuzzer.c"],
+    language = "C",
+    corpus = "response_corpus",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "percent_encoding_test",
     srcs = ["percent_encoding_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "slice_test",
     srcs = ["slice_test.c"],
     deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
 )
 
-cc_test(
+grpc_cc_test(
     name = "slice_string_helpers_test",
     srcs = ["slice_string_helpers_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "slice_buffer_test",
     srcs = ["slice_buffer_test.c"],
     deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
 )
 
-cc_test(
+grpc_cc_test(
     name = "slice_hash_table_test",
     srcs = ["slice_hash_table_test.c"],
     deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
 )
 
-cc_test(
+grpc_cc_test(
     name = "b64_test",
     srcs = ["b64_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/support/BUILD b/test/core/support/BUILD
index 3183510..db40819 100644
--- a/test/core/support/BUILD
+++ b/test/core/support/BUILD
@@ -27,137 +27,196 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "alloc_test",
     srcs = ["alloc_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "avl_test",
     srcs = ["avl_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "backoff_test",
     srcs = ["backoff_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "cmdline_test",
     srcs = ["cmdline_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "cpu_test",
     srcs = ["cpu_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "env_test",
     srcs = ["env_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "histogram_test",
     srcs = ["histogram_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "host_port_test",
     srcs = ["host_port_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "log_test",
     srcs = ["log_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "mpscq_test",
     srcs = ["mpscq_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "murmur_hash_test",
     srcs = ["murmur_hash_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "stack_lockfree_test",
     srcs = ["stack_lockfree_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "string_test",
     srcs = ["string_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "spinlock_test",
     srcs = ["spinlock_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "sync_test",
     srcs = ["sync_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "thd_test",
     srcs = ["thd_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "time_test",
     srcs = ["time_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "tls_test",
     srcs = ["tls_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "useful_test",
     srcs = ["useful_test.c"],
-    deps = ["//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//test/core/util:gpr_test_util",
+    ],
 )
diff --git a/test/core/surface/BUILD b/test/core/surface/BUILD
index 3d5e26c..44d37da 100644
--- a/test/core/surface/BUILD
+++ b/test/core/surface/BUILD
@@ -27,12 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "alarm_test",
     srcs = ["alarm_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -41,10 +43,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "grpc_byte_buffer_reader_test",
     srcs = ["byte_buffer_reader_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -53,10 +55,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "channel_create_test",
     srcs = ["channel_create_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -65,10 +67,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "grpc_completion_queue_test",
     srcs = ["completion_queue_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -77,10 +79,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "concurrent_connectivity_test",
     srcs = ["concurrent_connectivity_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -89,10 +91,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "init_test",
     srcs = ["init_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -101,10 +103,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "grpc_invalid_channel_args_test",
     srcs = ["invalid_channel_args_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -113,10 +115,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "lame_client_test",
     srcs = ["lame_client_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -126,10 +128,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "public_headers_must_be_c89",
     srcs = ["public_headers_must_be_c89.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -138,10 +140,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "secure_channel_create_test",
     srcs = ["secure_channel_create_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -150,10 +152,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "sequential_connectivity_test",
     srcs = ["sequential_connectivity_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -163,10 +165,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "server_chttp2_test",
     srcs = ["server_chttp2_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
@@ -175,10 +177,10 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "server_test",
     srcs = ["server_test.c"],
-    copts = ["-std=c99"],
+    language = "C",
     deps = [
         "//:gpr",
         "//:grpc",
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index 330da46..aa4769c 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -73,5 +73,6 @@
 #include <grpc/support/time.h>
 #include <grpc/support/tls.h>
 #include <grpc/support/useful.h>
+#include <grpc/support/workaround_list.h>
 
 int main(int argc, char **argv) { return 0; }
diff --git a/test/core/transport/BUILD b/test/core/transport/BUILD
index 08b2fd3..2628c89 100644
--- a/test/core/transport/BUILD
+++ b/test/core/transport/BUILD
@@ -27,53 +27,90 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "bdp_estimator_test",
     srcs = ["bdp_estimator_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "connectivity_state_test",
     srcs = ["connectivity_state_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "metadata_test",
     srcs = ["metadata_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "pid_controller_test",
     srcs = ["pid_controller_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "status_conversion_test",
     srcs = ["status_conversion_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "stream_owned_slice_test",
     srcs = ["stream_owned_slice_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "timeout_encoding_test",
     srcs = ["timeout_encoding_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/transport/chttp2/BUILD b/test/core/transport/chttp2/BUILD
index b507e27..af2a4ae 100644
--- a/test/core/transport/chttp2/BUILD
+++ b/test/core/transport/chttp2/BUILD
@@ -27,69 +27,114 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
 grpc_fuzzer(
-  name = "hpack_parser_fuzzer",
-  srcs = ["hpack_parser_fuzzer_test.c"],
-  deps = ["//:grpc", "//test/core/util:grpc_test_util"],
-  corpus = "hpack_parser_corpus"
+    name = "hpack_parser_fuzzer",
+    srcs = ["hpack_parser_fuzzer_test.c"],
+    corpus = "hpack_parser_corpus",
+    deps = [
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "alpn_test",
     srcs = ["alpn_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bin_decoder_test",
     srcs = ["bin_decoder_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bin_encoder_test",
     srcs = ["bin_encoder_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "hpack_encoder_test",
     srcs = ["hpack_encoder_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "hpack_parser_test",
     srcs = ["hpack_parser_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "hpack_table_test",
     srcs = ["hpack_table_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "stream_map_test",
     srcs = ["stream_map_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "varint_test",
     srcs = ["varint_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/tsi/BUILD b/test/core/tsi/BUILD
index e6cba34..a0f2910 100644
--- a/test/core/tsi/BUILD
+++ b/test/core/tsi/BUILD
@@ -27,11 +27,18 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+grpc_cc_test(
     name = "transport_security_test",
     srcs = ["transport_security_test.c"],
-    deps = ["//:grpc", "//test/core/util:grpc_test_util", "//:gpr", "//test/core/util:gpr_test_util"],
-    copts = ['-std=c99']
+    language = "C",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:gpr_test_util",
+        "//test/core/util:grpc_test_util",
+    ],
 )
diff --git a/test/core/util/BUILD b/test/core/util/BUILD
index 03c79f1..6b99462 100644
--- a/test/core/util/BUILD
+++ b/test/core/util/BUILD
@@ -27,23 +27,26 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary")
+
 licenses(["notice"])  # 3-clause BSD
 
-cc_library(
+package(default_visibility = ["//visibility:public"])
+
+grpc_cc_library(
     name = "gpr_test_util",
     srcs = [
-        "test_config.c",
         "memory_counters.c",
+        "test_config.c",
     ],
     hdrs = [
-        "test_config.h",
         "memory_counters.h",
+        "test_config.h",
     ],
     deps = ["//:gpr"],
-    visibility = ["//:__subpackages__"],
 )
 
-cc_library(
+grpc_cc_library(
     name = "grpc_test_util",
     srcs = [
         "debugger_macros.c",
@@ -60,7 +63,6 @@
     ],
     hdrs = [
         "debugger_macros.h",
-        "trickle_endpoint.h",
         "grpc_profiler.h",
         "mock_endpoint.h",
         "parse_hexstring.h",
@@ -70,21 +72,25 @@
         "reconnect_server.h",
         "slice_splitter.h",
         "test_tcp_server.h",
+        "trickle_endpoint.h",
     ],
-    deps = [":gpr_test_util", "//:grpc"],
-    visibility = ["//test:__subpackages__"],
-    copts = ["-std=c99"],
+    language = "C",
+    deps = [
+        ":gpr_test_util",
+        "//:grpc",
+    ],
 )
 
-cc_library(
-  name = "one_corpus_entry_fuzzer",
-  srcs = ["one_corpus_entry_fuzzer.c"],
-  deps = [":gpr_test_util", "//:grpc"],
-  visibility = ["//test:__subpackages__"],
+grpc_cc_library(
+    name = "one_corpus_entry_fuzzer",
+    srcs = ["one_corpus_entry_fuzzer.c"],
+    deps = [
+        ":gpr_test_util",
+        "//:grpc",
+    ],
 )
 
 sh_library(
-  name = "fuzzer_one_entry_runner",
-  srcs = ["fuzzer_one_entry_runner.sh"],
-  visibility = ["//test:__subpackages__"],
+    name = "fuzzer_one_entry_runner",
+    srcs = ["fuzzer_one_entry_runner.sh"],
 )
diff --git a/test/core/util/grpc_fuzzer.bzl b/test/core/util/grpc_fuzzer.bzl
index 2f552a9..2fcb58b 100644
--- a/test/core/util/grpc_fuzzer.bzl
+++ b/test/core/util/grpc_fuzzer.bzl
@@ -27,8 +27,10 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_binary")
+
 def grpc_fuzzer(name, corpus, srcs = [], deps = [], **kwargs):
-  native.cc_binary(
+  grpc_cc_binary(
     name = '%s/one_entry.bin' % name,
     srcs = srcs,
     deps = deps + ["//test/core/util:one_corpus_entry_fuzzer"],
diff --git a/test/core/util/port.c b/test/core/util/port.c
index da1ed4e..271ff22 100644
--- a/test/core/util/port.c
+++ b/test/core/util/port.c
@@ -77,9 +77,11 @@
 
 static void free_chosen_ports(void) {
   size_t i;
+  grpc_init();
   for (i = 0; i < num_chosen_ports; i++) {
     grpc_free_port_using_server(chosen_ports[i]);
   }
+  grpc_shutdown();
   gpr_free(chosen_ports);
 }
 
diff --git a/test/cpp/codegen/BUILD b/test/cpp/codegen/BUILD
index 43d133f..f974e63 100644
--- a/test/cpp/codegen/BUILD
+++ b/test/cpp/codegen/BUILD
@@ -29,37 +29,45 @@
 
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+load("//bazel:grpc_build_system.bzl", "grpc_cc_test")
+
+grpc_cc_test(
     name = "codegen_test_full",
     srcs = ["codegen_test_full.cc"],
     deps = [
         "//:grpc++",
-        "//external:gtest",
         "//test/core/util:gpr_test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "codegen_test_minimal",
     srcs = ["codegen_test_minimal.cc"],
     deps = [
         "//:grpc++",
-        "//external:gtest",
         "//test/core/util:gpr_test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "proto_utils_test",
     srcs = ["proto_utils_test.cc"],
     deps = [
         "//:grpc++",
-        "//external:gtest",
         "//test/core/util:gpr_test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "golden_file_test",
     srcs = ["golden_file_test.cc"],
     args = ["--generated_file_path=$(GENDIR)/src/proto/grpc/testing/"],
@@ -69,9 +77,11 @@
     ],
     deps = [
         "//:grpc++",
-        "//external:gflags",
-        "//external:gtest",
         "//src/proto/grpc/testing:compiler_test_proto",
         "//test/core/util:gpr_test_util",
     ],
+    external_deps = [
+        "gtest",
+        "gflags",
+    ],
 )
diff --git a/test/cpp/common/BUILD b/test/cpp/common/BUILD
index 48ad583..c8b3e46 100644
--- a/test/cpp/common/BUILD
+++ b/test/cpp/common/BUILD
@@ -29,32 +29,66 @@
 
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+load("//bazel:grpc_build_system.bzl", "grpc_cc_test")
+
+grpc_cc_test(
     name = "alarm_cpp_test",
     srcs = ["alarm_cpp_test.cc"],
-    deps = ["//:grpc++", "//external:gtest", "//test/core/util:gpr_test_util"],
+    deps = [
+        "//:grpc++",
+        "//test/core/util:gpr_test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "auth_property_iterator_test",
     srcs = ["auth_property_iterator_test.cc"],
-    deps = ["//:grpc++", "//external:gtest", "//test/core/util:gpr_test_util", "//test/cpp/util:test_util"],
+    deps = [
+        "//:grpc++",
+        "//test/core/util:gpr_test_util",
+        "//test/cpp/util:test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "channel_arguments_test",
     srcs = ["channel_arguments_test.cc"],
-    deps = ["//:grpc++", "//external:gtest", "//test/core/util:gpr_test_util"],
+    deps = [
+        "//:grpc++",
+        "//test/core/util:gpr_test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "channel_filter_test",
     srcs = ["channel_filter_test.cc"],
-    deps = ["//:grpc++", "//external:gtest", "//test/core/util:gpr_test_util"],
+    deps = [
+        "//:grpc++",
+        "//test/core/util:gpr_test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "secure_auth_context_test",
     srcs = ["secure_auth_context_test.cc"],
-    deps = ["//:grpc++", "//external:gtest", "//test/core/util:gpr_test_util", "//test/cpp/util:test_util"],
+    deps = [
+        "//:grpc++",
+        "//test/core/util:gpr_test_util",
+        "//test/cpp/util:test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
 )
diff --git a/test/cpp/end2end/BUILD b/test/cpp/end2end/BUILD
index e867493..9b691a8 100644
--- a/test/cpp/end2end/BUILD
+++ b/test/cpp/end2end/BUILD
@@ -29,25 +29,30 @@
 
 licenses(["notice"])  # 3-clause BSD
 
-cc_library(
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test")
+
+package(default_visibility=["//visibility:public"]) # Allows external users to implement end2end tests.
+
+grpc_cc_library(
     name = "test_service_impl",
     srcs = ["test_service_impl.cc"],
     hdrs = ["test_service_impl.h"],
     deps = [
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_proto",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "async_end2end_test",
     srcs = ["async_end2end_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/health/v1:health_proto",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
@@ -56,16 +61,18 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "client_crash_test",
     srcs = ["client_crash_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -73,17 +80,18 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "client_crash_test_server",
     srcs = ["client_crash_test_server.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gflags",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -91,17 +99,21 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gflags",
+        "gtest",
+    ],
 )
 
-cc_test(
-    name = "end2end_test",
+grpc_cc_library(
+    name = "end2end_test_lib",
     srcs = ["end2end_test.cc"],
+    testonly = True,
     deps = [
         ":test_service_impl",
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -109,16 +121,25 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
+    name = "end2end_test",
+    deps = [
+        ":end2end_test_lib"
+    ],
+)
+
+grpc_cc_test(
     name = "filter_end2end_test",
     srcs = ["filter_end2end_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -126,16 +147,18 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "generic_end2end_test",
     srcs = ["generic_end2end_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -143,9 +166,12 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "hybrid_end2end_test",
     srcs = ["hybrid_end2end_test.cc"],
     deps = [
@@ -153,7 +179,6 @@
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -161,16 +186,19 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "mock_test",
     srcs = ["mock_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
+        "//:grpc++_test",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -178,9 +206,12 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "round_robin_end2end_test",
     srcs = ["round_robin_end2end_test.cc"],
     deps = [
@@ -188,7 +219,6 @@
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -196,10 +226,12 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-
-cc_test(
+grpc_cc_test(
     name = "grpclb_end2end_test",
     srcs = ["grpclb_end2end_test.cc"],
     deps = [
@@ -207,7 +239,6 @@
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/lb/v1:load_balancer_proto",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
@@ -217,9 +248,12 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "proto_server_reflection_test",
     srcs = ["proto_server_reflection_test.cc"],
     deps = [
@@ -228,8 +262,6 @@
         "//:grpc",
         "//:grpc++",
         "//:grpc++_reflection",
-        "//external:gflags",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -238,9 +270,13 @@
         "//test/cpp/util:grpc++_proto_reflection_desc_db",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+        "gflags",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "server_builder_plugin_test",
     srcs = ["server_builder_plugin_test.cc"],
     deps = [
@@ -248,7 +284,6 @@
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -256,16 +291,18 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "server_crash_test",
     srcs = ["server_crash_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -273,17 +310,18 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "server_crash_test_client",
     srcs = ["server_crash_test_client.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gflags",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -291,16 +329,19 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gflags",
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "shutdown_test",
     srcs = ["shutdown_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -308,16 +349,18 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "streaming_throughput_test",
     srcs = ["streaming_throughput_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -325,16 +368,18 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "thread_stress_test",
     srcs = ["thread_stress_test.cc"],
     deps = [
         "//:gpr",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:echo_messages_proto",
         "//src/proto/grpc/testing:echo_proto",
         "//src/proto/grpc/testing/duplicate:echo_duplicate_proto",
@@ -342,4 +387,7 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index cc3958b..8d59cbb 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -47,7 +47,6 @@
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 #include <grpc/support/tls.h>
-#include <gtest/gtest.h>
 
 #include "src/core/lib/iomgr/port.h"
 #include "src/proto/grpc/health/v1/health.grpc.pb.h"
@@ -58,6 +57,8 @@
 #include "test/cpp/util/string_ref_helper.h"
 #include "test/cpp/util/test_credentials_provider.h"
 
+#include <gtest/gtest.h>
+
 #ifdef GRPC_POSIX_SOCKET
 #include "src/core/lib/iomgr/ev_posix.h"
 #endif
diff --git a/test/cpp/end2end/client_crash_test.cc b/test/cpp/end2end/client_crash_test.cc
index 966c04b..0ea5209 100644
--- a/test/cpp/end2end/client_crash_test.cc
+++ b/test/cpp/end2end/client_crash_test.cc
@@ -41,7 +41,6 @@
 #include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
@@ -49,6 +48,8 @@
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/subprocess.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using std::chrono::system_clock;
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index df71777..9a9e818 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -48,7 +48,6 @@
 #include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/core/lib/security/credentials/credentials.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
@@ -59,6 +58,8 @@
 #include "test/cpp/util/string_ref_helper.h"
 #include "test/cpp/util/test_credentials_provider.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using grpc::testing::kTlsCredentialsType;
diff --git a/test/cpp/end2end/filter_end2end_test.cc b/test/cpp/end2end/filter_end2end_test.cc
index 2f873ee..5589e2f 100644
--- a/test/cpp/end2end/filter_end2end_test.cc
+++ b/test/cpp/end2end/filter_end2end_test.cc
@@ -48,7 +48,6 @@
 #include <grpc/grpc.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/cpp/common/channel_filter.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
@@ -56,6 +55,8 @@
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/byte_buffer_proto_helper.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using std::chrono::system_clock;
diff --git a/test/cpp/end2end/generic_end2end_test.cc b/test/cpp/end2end/generic_end2end_test.cc
index 25c221b..281c58e 100644
--- a/test/cpp/end2end/generic_end2end_test.cc
+++ b/test/cpp/end2end/generic_end2end_test.cc
@@ -46,13 +46,14 @@
 #include <grpc/grpc.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/byte_buffer_proto_helper.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using std::chrono::system_clock;
@@ -115,6 +116,10 @@
   void client_fail(int i) { verify_ok(&cli_cq_, i, false); }
 
   void SendRpc(int num_rpcs) {
+    SendRpc(num_rpcs, false, gpr_inf_future(GPR_CLOCK_MONOTONIC));
+  }
+
+  void SendRpc(int num_rpcs, bool check_deadline, gpr_timespec deadline) {
     const grpc::string kMethodName("/grpc.cpp.test.util.EchoTestService/Echo");
     for (int i = 0; i < num_rpcs; i++) {
       EchoRequest send_request;
@@ -129,6 +134,11 @@
 
       // The string needs to be long enough to test heap-based slice.
       send_request.set_message("Hello world. Hello world. Hello world.");
+
+      if (check_deadline) {
+        cli_ctx.set_deadline(deadline);
+      }
+
       std::unique_ptr<GenericClientAsyncReaderWriter> call =
           generic_stub_->Call(&cli_ctx, kMethodName, &cli_cq_, tag(1));
       client_ok(1);
@@ -147,6 +157,12 @@
       verify_ok(srv_cq_.get(), 4, true);
       EXPECT_EQ(server_host_, srv_ctx.host().substr(0, server_host_.length()));
       EXPECT_EQ(kMethodName, srv_ctx.method());
+
+      if (check_deadline) {
+        EXPECT_TRUE(gpr_time_similar(deadline, srv_ctx.raw_deadline(),
+                                     gpr_time_from_millis(100, GPR_TIMESPAN)));
+      }
+
       ByteBuffer recv_buffer;
       stream.Read(&recv_buffer, tag(5));
       server_ok(5);
@@ -262,6 +278,12 @@
   EXPECT_TRUE(recv_status.ok());
 }
 
+TEST_F(GenericEnd2endTest, Deadline) {
+  ResetStub();
+  SendRpc(1, true, gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
+                                gpr_time_from_seconds(10, GPR_TIMESPAN)));
+}
+
 }  // namespace
 }  // namespace testing
 }  // namespace grpc
diff --git a/test/cpp/end2end/grpclb_end2end_test.cc b/test/cpp/end2end/grpclb_end2end_test.cc
index 8417f1a..4e1bcc7 100644
--- a/test/cpp/end2end/grpclb_end2end_test.cc
+++ b/test/cpp/end2end/grpclb_end2end_test.cc
@@ -98,12 +98,12 @@
 template <typename ServiceType>
 class CountedService : public ServiceType {
  public:
-  int request_count() {
+  size_t request_count() {
     std::unique_lock<std::mutex> lock(mu_);
     return request_count_;
   }
 
-  int response_count() {
+  size_t response_count() {
     std::unique_lock<std::mutex> lock(mu_);
     return response_count_;
   }
@@ -121,8 +121,8 @@
   std::mutex mu_;
 
  private:
-  int request_count_ = 0;
-  int response_count_ = 0;
+  size_t request_count_ = 0;
+  size_t response_count_ = 0;
 };
 
 using BackendService = CountedService<TestServiceImpl>;
@@ -243,9 +243,18 @@
   }
 
   static LoadBalanceResponse BuildResponseForBackends(
-      const std::vector<int>& backend_ports) {
+      const std::vector<int>& backend_ports, int num_drops_for_rate_limiting,
+      int num_drops_for_load_balancing) {
     LoadBalanceResponse response;
-    for (const int backend_port : backend_ports) {
+    for (int i = 0; i < num_drops_for_rate_limiting; ++i) {
+      auto* server = response.mutable_server_list()->add_servers();
+      server->set_drop_for_rate_limiting(true);
+    }
+    for (int i = 0; i < num_drops_for_load_balancing; ++i) {
+      auto* server = response.mutable_server_list()->add_servers();
+      server->set_drop_for_load_balancing(true);
+    }
+    for (const int& backend_port : backend_ports) {
       auto* server = response.mutable_server_list()->add_servers();
       server->set_ip_address(Ip4ToPackedString("127.0.0.1"));
       server->set_port(backend_port);
@@ -327,10 +336,8 @@
     ChannelArguments args;
     args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
                     response_generator_);
-    std::ostringstream uri;
-    uri << "test:///servername_not_used";
-    channel_ =
-        CreateCustomChannel(uri.str(), InsecureChannelCredentials(), args);
+    channel_ = CreateCustomChannel("test:///not_used",
+                                   InsecureChannelCredentials(), args);
     stub_ = grpc::testing::EchoTestService::NewStub(channel_);
   }
 
@@ -467,26 +474,33 @@
 };
 
 TEST_F(SingleBalancerTest, Vanilla) {
+  const size_t kNumRpcsPerAddress = 100;
   ScheduleResponseForBalancer(
-      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts()), 0);
+      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), 0, 0),
+      0);
   // Make sure that trying to connect works without a call.
   channel_->GetState(true /* try_to_connect */);
-  // Start servers and send 100 RPCs per server.
-  const auto& statuses_and_responses = SendRpc(kMessage_, 100 * num_backends_);
+  // Send 100 RPCs per server.
+  const auto& statuses_and_responses =
+      SendRpc(kMessage_, kNumRpcsPerAddress * num_backends_);
 
   for (const auto& status_and_response : statuses_and_responses) {
-    EXPECT_TRUE(status_and_response.first.ok());
-    EXPECT_EQ(status_and_response.second.message(), kMessage_);
+    const Status& status = status_and_response.first;
+    const EchoResponse& response = status_and_response.second;
+    EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
+                             << " message=" << status.error_message();
+    EXPECT_EQ(response.message(), kMessage_);
   }
 
   // Each backend should have gotten 100 requests.
   for (size_t i = 0; i < backends_.size(); ++i) {
-    EXPECT_EQ(100, backend_servers_[i].service_->request_count());
+    EXPECT_EQ(kNumRpcsPerAddress,
+              backend_servers_[i].service_->request_count());
   }
   // The balancer got a single request.
-  EXPECT_EQ(1, balancer_servers_[0].service_->request_count());
+  EXPECT_EQ(1U, balancer_servers_[0].service_->request_count());
   // and sent a single response.
-  EXPECT_EQ(1, balancer_servers_[0].service_->response_count());
+  EXPECT_EQ(1U, balancer_servers_[0].service_->response_count());
 
   // Check LB policy name for the channel.
   EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
@@ -500,7 +514,7 @@
   ScheduleResponseForBalancer(0, LoadBalanceResponse(), 0);
   // Send non-empty serverlist only after kServerlistDelayMs
   ScheduleResponseForBalancer(
-      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts()),
+      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), 0, 0),
       kServerlistDelayMs);
 
   const auto t0 = system_clock::now();
@@ -518,17 +532,20 @@
 
   // Each backend should have gotten 1 request.
   for (size_t i = 0; i < backends_.size(); ++i) {
-    EXPECT_EQ(1, backend_servers_[i].service_->request_count());
+    EXPECT_EQ(1U, backend_servers_[i].service_->request_count());
   }
   for (const auto& status_and_response : statuses_and_responses) {
-    EXPECT_TRUE(status_and_response.first.ok());
-    EXPECT_EQ(status_and_response.second.message(), kMessage_);
+    const Status& status = status_and_response.first;
+    const EchoResponse& response = status_and_response.second;
+    EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
+                             << " message=" << status.error_message();
+    EXPECT_EQ(response.message(), kMessage_);
   }
 
   // The balancer got a single request.
-  EXPECT_EQ(1, balancer_servers_[0].service_->request_count());
+  EXPECT_EQ(1U, balancer_servers_[0].service_->request_count());
   // and sent two responses.
-  EXPECT_EQ(2, balancer_servers_[0].service_->response_count());
+  EXPECT_EQ(2U, balancer_servers_[0].service_->response_count());
 
   // Check LB policy name for the channel.
   EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
@@ -539,10 +556,11 @@
 
   // Send a serverlist right away.
   ScheduleResponseForBalancer(
-      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts()), 0);
+      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), 0, 0),
+      0);
   // ... and the same one a bit later.
   ScheduleResponseForBalancer(
-      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts()),
+      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), 0, 0),
       kServerlistDelayMs);
 
   // Send num_backends/2 requests.
@@ -550,14 +568,17 @@
   // only the first half of the backends will receive them.
   for (size_t i = 0; i < backends_.size(); ++i) {
     if (i < backends_.size() / 2)
-      EXPECT_EQ(1, backend_servers_[i].service_->request_count());
+      EXPECT_EQ(1U, backend_servers_[i].service_->request_count());
     else
-      EXPECT_EQ(0, backend_servers_[i].service_->request_count());
+      EXPECT_EQ(0U, backend_servers_[i].service_->request_count());
   }
   EXPECT_EQ(statuses_and_responses.size(), num_backends_ / 2);
   for (const auto& status_and_response : statuses_and_responses) {
-    EXPECT_TRUE(status_and_response.first.ok());
-    EXPECT_EQ(status_and_response.second.message(), kMessage_);
+    const Status& status = status_and_response.first;
+    const EchoResponse& response = status_and_response.second;
+    EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
+                             << " message=" << status.error_message();
+    EXPECT_EQ(response.message(), kMessage_);
   }
 
   // Wait for the (duplicated) serverlist update.
@@ -566,7 +587,7 @@
       gpr_time_from_millis(kServerlistDelayMs * 1.1, GPR_TIMESPAN)));
 
   // Verify the LB has sent two responses.
-  EXPECT_EQ(2, balancer_servers_[0].service_->response_count());
+  EXPECT_EQ(2U, balancer_servers_[0].service_->response_count());
 
   // Some more calls to complete the total number of backends.
   statuses_and_responses = SendRpc(
@@ -575,52 +596,146 @@
   // Because a duplicated serverlist should have no effect, all backends must
   // have been hit once now.
   for (size_t i = 0; i < backends_.size(); ++i) {
-    EXPECT_EQ(1, backend_servers_[i].service_->request_count());
+    EXPECT_EQ(1U, backend_servers_[i].service_->request_count());
   }
   EXPECT_EQ(statuses_and_responses.size(), num_backends_ / 2);
   for (const auto& status_and_response : statuses_and_responses) {
-    EXPECT_TRUE(status_and_response.first.ok());
-    EXPECT_EQ(status_and_response.second.message(), kMessage_);
+    const Status& status = status_and_response.first;
+    const EchoResponse& response = status_and_response.second;
+    EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
+                             << " message=" << status.error_message();
+    EXPECT_EQ(response.message(), kMessage_);
   }
 
   // The balancer got a single request.
-  EXPECT_EQ(1, balancer_servers_[0].service_->request_count());
+  EXPECT_EQ(1U, balancer_servers_[0].service_->request_count());
   // Check LB policy name for the channel.
   EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
 }
 
+TEST_F(SingleBalancerTest, Drop) {
+  const size_t kNumRpcsPerAddress = 100;
+  ScheduleResponseForBalancer(
+      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), 1, 2),
+      0);
+  // Send 100 RPCs for each server and drop address.
+  const auto& statuses_and_responses =
+      SendRpc(kMessage_, kNumRpcsPerAddress * (num_backends_ + 3));
+
+  size_t num_drops = 0;
+  for (const auto& status_and_response : statuses_and_responses) {
+    const Status& status = status_and_response.first;
+    const EchoResponse& response = status_and_response.second;
+    if (!status.ok() &&
+        status.error_message() == "Call dropped by load balancing policy") {
+      ++num_drops;
+    } else {
+      EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
+                               << " message=" << status.error_message();
+      EXPECT_EQ(response.message(), kMessage_);
+    }
+  }
+  EXPECT_EQ(kNumRpcsPerAddress * 3, num_drops);
+
+  // Each backend should have gotten 100 requests.
+  for (size_t i = 0; i < backends_.size(); ++i) {
+    EXPECT_EQ(kNumRpcsPerAddress,
+              backend_servers_[i].service_->request_count());
+  }
+  // The balancer got a single request.
+  EXPECT_EQ(1U, balancer_servers_[0].service_->request_count());
+  // and sent a single response.
+  EXPECT_EQ(1U, balancer_servers_[0].service_->response_count());
+}
+
 class SingleBalancerWithClientLoadReportingTest : public GrpclbEnd2endTest {
  public:
   SingleBalancerWithClientLoadReportingTest() : GrpclbEnd2endTest(4, 1, 2) {}
 };
 
 TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) {
+  const size_t kNumRpcsPerAddress = 100;
   ScheduleResponseForBalancer(
-      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts()), 0);
-  // Start servers and send 100 RPCs per server.
-  const auto& statuses_and_responses = SendRpc(kMessage_, 100 * num_backends_);
+      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), 0, 0),
+      0);
+  // Send 100 RPCs per server.
+  const auto& statuses_and_responses =
+      SendRpc(kMessage_, kNumRpcsPerAddress * num_backends_);
 
   for (const auto& status_and_response : statuses_and_responses) {
-    EXPECT_TRUE(status_and_response.first.ok());
-    EXPECT_EQ(status_and_response.second.message(), kMessage_);
+    const Status& status = status_and_response.first;
+    const EchoResponse& response = status_and_response.second;
+    EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
+                             << " message=" << status.error_message();
+    EXPECT_EQ(response.message(), kMessage_);
   }
 
   // Each backend should have gotten 100 requests.
   for (size_t i = 0; i < backends_.size(); ++i) {
-    EXPECT_EQ(100, backend_servers_[i].service_->request_count());
+    EXPECT_EQ(kNumRpcsPerAddress,
+              backend_servers_[i].service_->request_count());
   }
   // The balancer got a single request.
-  EXPECT_EQ(1, balancer_servers_[0].service_->request_count());
+  EXPECT_EQ(1U, balancer_servers_[0].service_->request_count());
   // and sent a single response.
-  EXPECT_EQ(1, balancer_servers_[0].service_->response_count());
+  EXPECT_EQ(1U, balancer_servers_[0].service_->response_count());
 
   const ClientStats client_stats = WaitForLoadReports();
-  EXPECT_EQ(100 * num_backends_, client_stats.num_calls_started);
-  EXPECT_EQ(100 * num_backends_, client_stats.num_calls_finished);
+  EXPECT_EQ(kNumRpcsPerAddress * num_backends_, client_stats.num_calls_started);
+  EXPECT_EQ(kNumRpcsPerAddress * num_backends_,
+            client_stats.num_calls_finished);
   EXPECT_EQ(0U, client_stats.num_calls_finished_with_drop_for_rate_limiting);
   EXPECT_EQ(0U, client_stats.num_calls_finished_with_drop_for_load_balancing);
   EXPECT_EQ(0U, client_stats.num_calls_finished_with_client_failed_to_send);
-  EXPECT_EQ(100 * num_backends_,
+  EXPECT_EQ(kNumRpcsPerAddress * num_backends_,
+            client_stats.num_calls_finished_known_received);
+}
+
+TEST_F(SingleBalancerWithClientLoadReportingTest, Drop) {
+  const size_t kNumRpcsPerAddress = 3;
+  ScheduleResponseForBalancer(
+      0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), 2, 1),
+      0);
+  // Send 100 RPCs for each server and drop address.
+  const auto& statuses_and_responses =
+      SendRpc(kMessage_, kNumRpcsPerAddress * (num_backends_ + 3));
+
+  size_t num_drops = 0;
+  for (const auto& status_and_response : statuses_and_responses) {
+    const Status& status = status_and_response.first;
+    const EchoResponse& response = status_and_response.second;
+    if (!status.ok() &&
+        status.error_message() == "Call dropped by load balancing policy") {
+      ++num_drops;
+    } else {
+      EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
+                               << " message=" << status.error_message();
+      EXPECT_EQ(response.message(), kMessage_);
+    }
+  }
+  EXPECT_EQ(kNumRpcsPerAddress * 3, num_drops);
+
+  // Each backend should have gotten 100 requests.
+  for (size_t i = 0; i < backends_.size(); ++i) {
+    EXPECT_EQ(kNumRpcsPerAddress,
+              backend_servers_[i].service_->request_count());
+  }
+  // The balancer got a single request.
+  EXPECT_EQ(1U, balancer_servers_[0].service_->request_count());
+  // and sent a single response.
+  EXPECT_EQ(1U, balancer_servers_[0].service_->response_count());
+
+  const ClientStats client_stats = WaitForLoadReports();
+  EXPECT_EQ(kNumRpcsPerAddress * (num_backends_ + 3),
+            client_stats.num_calls_started);
+  EXPECT_EQ(kNumRpcsPerAddress * (num_backends_ + 3),
+            client_stats.num_calls_finished);
+  EXPECT_EQ(kNumRpcsPerAddress * 2,
+            client_stats.num_calls_finished_with_drop_for_rate_limiting);
+  EXPECT_EQ(kNumRpcsPerAddress,
+            client_stats.num_calls_finished_with_drop_for_load_balancing);
+  EXPECT_EQ(0U, client_stats.num_calls_finished_with_client_failed_to_send);
+  EXPECT_EQ(kNumRpcsPerAddress * num_backends_,
             client_stats.num_calls_finished_known_received);
 }
 
diff --git a/test/cpp/end2end/health_service_end2end_test.cc b/test/cpp/end2end/health_service_end2end_test.cc
index 3d51007..c320c78 100644
--- a/test/cpp/end2end/health_service_end2end_test.cc
+++ b/test/cpp/end2end/health_service_end2end_test.cc
@@ -46,7 +46,6 @@
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/health/v1/health.grpc.pb.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
@@ -55,6 +54,8 @@
 #include "test/core/util/test_config.h"
 #include "test/cpp/end2end/test_service_impl.h"
 
+#include <gtest/gtest.h>
+
 using grpc::health::v1::Health;
 using grpc::health::v1::HealthCheckRequest;
 using grpc::health::v1::HealthCheckResponse;
diff --git a/test/cpp/end2end/hybrid_end2end_test.cc b/test/cpp/end2end/hybrid_end2end_test.cc
index a4ba76f..1cd515a 100644
--- a/test/cpp/end2end/hybrid_end2end_test.cc
+++ b/test/cpp/end2end/hybrid_end2end_test.cc
@@ -42,7 +42,6 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
@@ -51,6 +50,8 @@
 #include "test/cpp/end2end/test_service_impl.h"
 #include "test/cpp/util/byte_buffer_proto_helper.h"
 
+#include <gtest/gtest.h>
+
 namespace grpc {
 namespace testing {
 
diff --git a/test/cpp/end2end/mock_test.cc b/test/cpp/end2end/mock_test.cc
index 7e33006..3a82b3a 100644
--- a/test/cpp/end2end/mock_test.cc
+++ b/test/cpp/end2end/mock_test.cc
@@ -45,7 +45,6 @@
 #include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include <grpc++/test/mock_stream.h>
 
@@ -55,6 +54,8 @@
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
+#include <gtest/gtest.h>
+
 #include <iostream>
 
 using namespace std;
diff --git a/test/cpp/end2end/proto_server_reflection_test.cc b/test/cpp/end2end/proto_server_reflection_test.cc
index 8b9688d..25cb0d5 100644
--- a/test/cpp/end2end/proto_server_reflection_test.cc
+++ b/test/cpp/end2end/proto_server_reflection_test.cc
@@ -41,7 +41,6 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
@@ -49,6 +48,8 @@
 #include "test/cpp/end2end/test_service_impl.h"
 #include "test/cpp/util/proto_reflection_descriptor_database.h"
 
+#include <gtest/gtest.h>
+
 namespace grpc {
 namespace testing {
 
diff --git a/test/cpp/end2end/round_robin_end2end_test.cc b/test/cpp/end2end/round_robin_end2end_test.cc
index cc340b9..f8e3cc0 100644
--- a/test/cpp/end2end/round_robin_end2end_test.cc
+++ b/test/cpp/end2end/round_robin_end2end_test.cc
@@ -44,13 +44,14 @@
 #include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/end2end/test_service_impl.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using std::chrono::system_clock;
diff --git a/test/cpp/end2end/server_builder_plugin_test.cc b/test/cpp/end2end/server_builder_plugin_test.cc
index 1b6f4ce..81b747a 100644
--- a/test/cpp/end2end/server_builder_plugin_test.cc
+++ b/test/cpp/end2end/server_builder_plugin_test.cc
@@ -45,13 +45,14 @@
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/end2end/test_service_impl.h"
 
+#include <gtest/gtest.h>
+
 #define PLUGIN_NAME "TestServerBuilderPlugin"
 
 namespace grpc {
diff --git a/test/cpp/end2end/server_crash_test.cc b/test/cpp/end2end/server_crash_test.cc
index b1f9216..4b7041a 100644
--- a/test/cpp/end2end/server_crash_test.cc
+++ b/test/cpp/end2end/server_crash_test.cc
@@ -41,7 +41,6 @@
 #include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
@@ -49,6 +48,8 @@
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/subprocess.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using std::chrono::system_clock;
diff --git a/test/cpp/end2end/shutdown_test.cc b/test/cpp/end2end/shutdown_test.cc
index bd68e85..63b397d 100644
--- a/test/cpp/end2end/shutdown_test.cc
+++ b/test/cpp/end2end/shutdown_test.cc
@@ -33,8 +33,6 @@
 
 #include <thread>
 
-#include <gtest/gtest.h>
-
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
@@ -51,6 +49,8 @@
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/test_credentials_provider.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 
diff --git a/test/cpp/end2end/streaming_throughput_test.cc b/test/cpp/end2end/streaming_throughput_test.cc
index 3025837..ec5b83d 100644
--- a/test/cpp/end2end/streaming_throughput_test.cc
+++ b/test/cpp/end2end/streaming_throughput_test.cc
@@ -35,8 +35,6 @@
 #include <mutex>
 #include <thread>
 
-#include <gtest/gtest.h>
-
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
@@ -56,6 +54,8 @@
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using std::chrono::system_clock;
diff --git a/test/cpp/end2end/test_service_impl.cc b/test/cpp/end2end/test_service_impl.cc
index b473dd1..5411b35 100644
--- a/test/cpp/end2end/test_service_impl.cc
+++ b/test/cpp/end2end/test_service_impl.cc
@@ -40,11 +40,11 @@
 #include <grpc++/server_context.h>
 #include <grpc/support/log.h>
 
-#include <gtest/gtest.h>
-
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/cpp/util/string_ref_helper.h"
 
+#include <gtest/gtest.h>
+
 using std::chrono::system_clock;
 
 namespace grpc {
diff --git a/test/cpp/end2end/thread_stress_test.cc b/test/cpp/end2end/thread_stress_test.cc
index d353f98..defa789 100644
--- a/test/cpp/end2end/thread_stress_test.cc
+++ b/test/cpp/end2end/thread_stress_test.cc
@@ -43,7 +43,6 @@
 #include <grpc/grpc.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/core/lib/surface/api_trace.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
@@ -51,6 +50,8 @@
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
+#include <gtest/gtest.h>
+
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using std::chrono::system_clock;
diff --git a/test/cpp/microbenchmarks/BUILD b/test/cpp/microbenchmarks/BUILD
index 208ac6d..3a968a0 100644
--- a/test/cpp/microbenchmarks/BUILD
+++ b/test/cpp/microbenchmarks/BUILD
@@ -29,14 +29,17 @@
 
 licenses(["notice"])  # 3-clause BSD
 
-cc_test(
+load("//bazel:grpc_build_system.bzl", "grpc_cc_test", "grpc_cc_library")
+
+grpc_cc_test(
     name = "noop-benchmark",
     srcs = ["noop-benchmark.cc"],
-    linkopts = ["-pthread"],
-    deps = ["//external:benchmark"],
+    external_deps = [
+        "benchmark",
+    ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "helpers",
     srcs = ["helpers.cc"],
     hdrs = [
@@ -44,64 +47,68 @@
         "fullstack_fixtures.h",
         "helpers.h",
     ],
-    linkopts = ["-pthread"],
     deps = [
         "//:grpc++",
-        "//external:benchmark",
         "//src/proto/grpc/testing:echo_proto",
         "//test/core/util:grpc_test_util",
     ],
+    external_deps = [
+        "benchmark",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_closure",
     srcs = ["bm_closure.cc"],
     deps = [":helpers"],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_cq",
     srcs = ["bm_cq.cc"],
     deps = [":helpers"],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_cq_multiple_threads",
     srcs = ["bm_cq_multiple_threads.cc"],
     deps = [":helpers"],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_error",
     srcs = ["bm_error.cc"],
     deps = [":helpers"],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_fullstack_streaming_ping_pong",
     srcs = ["bm_fullstack_streaming_ping_pong.cc"],
     deps = [":helpers"],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_fullstack_streaming_pump",
     srcs = ["bm_fullstack_streaming_pump.cc"],
     deps = [":helpers"],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_fullstack_trickle",
     srcs = ["bm_fullstack_trickle.cc"],
-    deps = [":helpers", "//external:gflags"],
+    deps = [":helpers"],
+    external_deps = [
+        "gflags",
+    ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_fullstack_unary_ping_pong",
     srcs = ["bm_fullstack_unary_ping_pong.cc"],
     deps = [":helpers"],
 )
 
-cc_test(
+grpc_cc_test(
     name = "bm_metadata",
     srcs = ["bm_metadata.cc"],
     deps = [":helpers"],
diff --git a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
index 0d267da..704f255 100644
--- a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
+++ b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
@@ -81,10 +81,16 @@
   gpr_free(cq_completion);
 }
 
-/* Queues a completion tag. ZERO polling overhead */
+/* 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, gpr_timespec now,
                                 gpr_timespec deadline) {
+  if (gpr_time_cmp(deadline, gpr_time_0(GPR_CLOCK_MONOTONIC)) == 0) {
+    gpr_log(GPR_ERROR, "no-op");
+    return GRPC_ERROR_NONE;
+  }
+
   gpr_mu_unlock(&ps->mu);
   grpc_cq_begin_op(g_cq, g_tag);
   grpc_cq_end_op(exec_ctx, g_cq, g_tag, GRPC_ERROR_NONE, cq_done_cb, NULL,
@@ -115,6 +121,14 @@
 
 static void teardown() {
   grpc_completion_queue_shutdown(g_cq);
+
+  /* Drain any events */
+  gpr_timespec deadline = gpr_time_0(GPR_CLOCK_MONOTONIC);
+  while (grpc_completion_queue_next(g_cq, deadline, NULL).type !=
+         GRPC_QUEUE_SHUTDOWN) {
+    /* Do nothing */
+  }
+
   grpc_completion_queue_destroy(g_cq);
 }
 
diff --git a/test/cpp/microbenchmarks/fullstack_fixtures.h b/test/cpp/microbenchmarks/fullstack_fixtures.h
index 98aca1c..aa71c2a 100644
--- a/test/cpp/microbenchmarks/fullstack_fixtures.h
+++ b/test/cpp/microbenchmarks/fullstack_fixtures.h
@@ -100,6 +100,12 @@
     }
   }
 
+  void AddToLabel(std::ostream& out, benchmark::State& state) {
+    BaseFixture::AddToLabel(out, state);
+    out << " polls/iter:"
+        << (double)grpc_get_cq_poll_num(this->cq()->cq()) / state.iterations();
+  }
+
   ServerCompletionQueue* cq() { return cq_.get(); }
   std::shared_ptr<Channel> channel() { return channel_; }
 
@@ -212,6 +218,12 @@
     }
   }
 
+  void AddToLabel(std::ostream& out, benchmark::State& state) {
+    BaseFixture::AddToLabel(out, state);
+    out << " polls/iter:"
+        << (double)grpc_get_cq_poll_num(this->cq()->cq()) / state.iterations();
+  }
+
   ServerCompletionQueue* cq() { return cq_.get(); }
   std::shared_ptr<Channel> channel() { return channel_; }
 
@@ -245,7 +257,7 @@
   void AddToLabel(std::ostream& out, benchmark::State& state) {
     EndpointPairFixture::AddToLabel(out, state);
     out << " writes/iter:"
-        << ((double)stats_.num_writes / (double)state.iterations());
+        << (double)stats_.num_writes / (double)state.iterations();
   }
 
  private:
diff --git a/test/cpp/microbenchmarks/helpers.cc b/test/cpp/microbenchmarks/helpers.cc
index 6550742..73ab9e4 100644
--- a/test/cpp/microbenchmarks/helpers.cc
+++ b/test/cpp/microbenchmarks/helpers.cc
@@ -36,11 +36,11 @@
 void TrackCounters::Finish(benchmark::State &state) {
   std::ostringstream out;
   AddToLabel(out, state);
-  auto label = out.str();
+  std::string label = out.str();
   if (label.length() && label[0] == ' ') {
     label = label.substr(1);
   }
-  state.SetLabel(label);
+  state.SetLabel(label.c_str());
 }
 
 void TrackCounters::AddToLabel(std::ostream &out, benchmark::State &state) {
diff --git a/test/cpp/qps/BUILD b/test/cpp/qps/BUILD
index 6492b63..c6a1fd2 100644
--- a/test/cpp/qps/BUILD
+++ b/test/cpp/qps/BUILD
@@ -29,14 +29,17 @@
 
 licenses(["notice"])  # 3-clause BSD
 
-cc_library(
+load("//bazel:grpc_build_system.bzl", "grpc_cc_test", "grpc_cc_library", "grpc_cc_binary")
+
+grpc_cc_library(
     name = "parse_json",
     srcs = ["parse_json.cc"],
     hdrs = ["parse_json.h"],
     deps = ["//:grpc++"],
+    external_deps = ["protobuf"],
 )
 
-cc_library(
+grpc_cc_library(
     name = "qps_worker_impl",
     srcs = [
         "client_async.cc",
@@ -56,7 +59,6 @@
         ":usage_timer",
         "//:grpc",
         "//:grpc++",
-        "//external:gtest",
         "//src/proto/grpc/testing:control_proto",
         "//src/proto/grpc/testing:payloads_proto",
         "//src/proto/grpc/testing:services_proto",
@@ -65,9 +67,12 @@
         "//test/core/util:grpc_test_util",
         "//test/cpp/util:test_util",
     ],
+    external_deps = [
+        "gtest",
+    ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "driver_impl",
     srcs = [
         "driver.cc",
@@ -90,7 +95,7 @@
     ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "benchmark_config",
     srcs = [
         "benchmark_config.cc",
@@ -102,12 +107,14 @@
         ":driver_impl",
         ":histogram",
         "//:grpc++",
-        "//external:gflags",
         "//src/proto/grpc/testing:control_proto",
     ],
+    external_deps = [
+        "gflags",
+    ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "histogram",
     hdrs = [
         "histogram.h",
@@ -116,13 +123,13 @@
     deps = ["//:gpr"],
 )
 
-cc_library(
+grpc_cc_library(
     name = "interarrival",
     hdrs = ["interarrival.h"],
     deps = ["//:grpc++"],
 )
 
-cc_binary(
+grpc_cc_binary(
     name = "json_run_localhost",
     srcs = ["json_run_localhost.cc"],
     deps = [
@@ -133,7 +140,7 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "qps_interarrival_test",
     srcs = ["qps_interarrival_test.cc"],
     deps = [
@@ -142,18 +149,20 @@
     ],
 )
 
-cc_binary(
+grpc_cc_binary(
     name = "qps_json_driver",
     srcs = ["qps_json_driver.cc"],
     deps = [
         ":benchmark_config",
         ":driver_impl",
         "//:grpc++",
-        "//external:gflags",
+    ],
+    external_deps = [
+        "gflags",
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "qps_openloop_test",
     srcs = ["qps_openloop_test.cc"],
     deps = [
@@ -163,7 +172,7 @@
     ],
 )
 
-cc_test(
+grpc_cc_test(
     name = "secure_sync_unary_ping_pong_test",
     srcs = ["secure_sync_unary_ping_pong_test.cc"],
     deps = [
@@ -173,14 +182,14 @@
     ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "usage_timer",
     srcs = ["usage_timer.cc"],
     hdrs = ["usage_timer.h"],
     deps = ["//:gpr"],
 )
 
-cc_binary(
+grpc_cc_binary(
     name = "qps_worker",
     srcs = ["worker.cc"],
     deps = [
diff --git a/test/cpp/qps/client.h b/test/cpp/qps/client.h
index c3197eb..5ae6b54 100644
--- a/test/cpp/qps/client.h
+++ b/test/cpp/qps/client.h
@@ -46,6 +46,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
 
+#include "src/core/lib/surface/completion_queue.h"
 #include "src/proto/grpc/testing/payloads.pb.h"
 #include "src/proto/grpc/testing/services.grpc.pb.h"
 
@@ -150,7 +151,8 @@
   Client()
       : timer_(new UsageTimer),
         interarrival_timer_(),
-        started_requests_(false) {
+        started_requests_(false),
+        last_reset_poll_count_(0) {
     gpr_event_init(&start_requests_);
   }
   virtual ~Client() {}
@@ -162,6 +164,8 @@
 
     MaybeStartRequests();
 
+    int cur_poll_count = GetPollCount();
+    int poll_count = cur_poll_count - last_reset_poll_count_;
     if (reset) {
       std::vector<Histogram> to_merge(threads_.size());
       std::vector<StatusHistogram> to_merge_status(threads_.size());
@@ -176,6 +180,7 @@
         MergeStatusHistogram(to_merge_status[i], &statuses);
       }
       timer_result = timer->Mark();
+      last_reset_poll_count_ = cur_poll_count;
     } else {
       // merge snapshots of each thread histogram
       for (size_t i = 0; i < threads_.size(); i++) {
@@ -195,6 +200,7 @@
     stats.set_time_elapsed(timer_result.wall);
     stats.set_time_system(timer_result.system);
     stats.set_time_user(timer_result.user);
+    stats.set_cq_poll_count(poll_count);
     return stats;
   }
 
@@ -209,6 +215,11 @@
     }
   }
 
+  virtual int GetPollCount() {
+    // For sync client.
+    return 0;
+  }
+
  protected:
   bool closed_loop_;
   gpr_atm thread_pool_done_;
@@ -351,6 +362,8 @@
   gpr_event start_requests_;
   bool started_requests_;
 
+  int last_reset_poll_count_;
+
   void MaybeStartRequests() {
     if (!started_requests_) {
       started_requests_ = true;
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 82c3356..6b8f736 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -205,6 +205,14 @@
     }
   }
 
+  int GetPollCount() override {
+    int count = 0;
+    for (auto cq = cli_cqs_.begin(); cq != cli_cqs_.end(); cq++) {
+      count += grpc_get_cq_poll_num((*cq)->cq());
+    }
+    return count;
+  }
+
  protected:
   const int num_async_threads_;
 
diff --git a/test/cpp/qps/client_sync.cc b/test/cpp/qps/client_sync.cc
index 9075033..f357132 100644
--- a/test/cpp/qps/client_sync.cc
+++ b/test/cpp/qps/client_sync.cc
@@ -48,7 +48,6 @@
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
-#include <gtest/gtest.h>
 
 #include "src/core/lib/profiling/timers.h"
 #include "src/proto/grpc/testing/services.grpc.pb.h"
diff --git a/test/cpp/qps/driver.cc b/test/cpp/qps/driver.cc
index 74fe366..ace5028 100644
--- a/test/cpp/qps/driver.cc
+++ b/test/cpp/qps/driver.cc
@@ -112,6 +112,8 @@
 static double WallTime(ClientStats s) { return s.time_elapsed(); }
 static double SystemTime(ClientStats s) { return s.time_system(); }
 static double UserTime(ClientStats s) { return s.time_user(); }
+static double CliPollCount(ClientStats s) { return s.cq_poll_count(); }
+static double SvrPollCount(ServerStats s) { return s.cq_poll_count(); }
 static double ServerWallTime(ServerStats s) { return s.time_elapsed(); }
 static double ServerSystemTime(ServerStats s) { return s.time_system(); }
 static double ServerUserTime(ServerStats s) { return s.time_user(); }
@@ -180,6 +182,11 @@
     result->mutable_summary()->set_failed_requests_per_second(failures /
                                                               time_estimate);
   }
+
+  result->mutable_summary()->set_client_polls_per_request(
+      sum(result->client_stats(), CliPollCount) / histogram.Count());
+  result->mutable_summary()->set_server_polls_per_request(
+      sum(result->server_stats(), SvrPollCount) / histogram.Count());
 }
 
 std::unique_ptr<ScenarioResult> RunScenario(
diff --git a/test/cpp/qps/qps_json_driver.cc b/test/cpp/qps/qps_json_driver.cc
index a906137..f00f771 100644
--- a/test/cpp/qps/qps_json_driver.cc
+++ b/test/cpp/qps/qps_json_driver.cc
@@ -94,6 +94,7 @@
   GetReporter()->ReportLatency(*result);
   GetReporter()->ReportTimes(*result);
   GetReporter()->ReportCpuUsage(*result);
+  GetReporter()->ReportPollCount(*result);
 
   for (int i = 0; *success && i < result->client_success_size(); i++) {
     *success = result->client_success(i);
diff --git a/test/cpp/qps/report.cc b/test/cpp/qps/report.cc
index a9130bf..8bb4c9a 100644
--- a/test/cpp/qps/report.cc
+++ b/test/cpp/qps/report.cc
@@ -80,6 +80,12 @@
   }
 }
 
+void CompositeReporter::ReportPollCount(const ScenarioResult& result) {
+  for (size_t i = 0; i < reporters_.size(); ++i) {
+    reporters_[i]->ReportPollCount(result);
+  }
+}
+
 void GprLogReporter::ReportQPS(const ScenarioResult& result) {
   gpr_log(GPR_INFO, "QPS: %.1f", result.summary().qps());
   if (result.summary().failed_requests_per_second() > 0) {
@@ -121,6 +127,13 @@
           result.summary().server_cpu_usage());
 }
 
+void GprLogReporter::ReportPollCount(const ScenarioResult& result) {
+  gpr_log(GPR_INFO, "Client Polls per Request: %.2f",
+          result.summary().client_polls_per_request());
+  gpr_log(GPR_INFO, "Server Polls per Request: %.2f",
+          result.summary().server_polls_per_request());
+}
+
 void JsonReporter::ReportQPS(const ScenarioResult& result) {
   grpc::string json_string =
       SerializeJson(result, "type.googleapis.com/grpc.testing.ScenarioResult");
@@ -145,6 +158,10 @@
   // NOP - all reporting is handled by ReportQPS.
 }
 
+void JsonReporter::ReportPollCount(const ScenarioResult& result) {
+  // NOP - all reporting is handled by ReportQPS.
+}
+
 void RpcReporter::ReportQPS(const ScenarioResult& result) {
   grpc::ClientContext context;
   grpc::Status status;
@@ -177,5 +194,9 @@
   // NOP - all reporting is handled by ReportQPS.
 }
 
+void RpcReporter::ReportPollCount(const ScenarioResult& result) {
+  // NOP - all reporting is handled by ReportQPS.
+}
+
 }  // namespace testing
 }  // namespace grpc
diff --git a/test/cpp/qps/report.h b/test/cpp/qps/report.h
index 1749be9..621fa7c 100644
--- a/test/cpp/qps/report.h
+++ b/test/cpp/qps/report.h
@@ -76,6 +76,9 @@
   /** Reports server cpu usage. */
   virtual void ReportCpuUsage(const ScenarioResult& result) = 0;
 
+  /** Reports client and server poll usage inside completion queue. */
+  virtual void ReportPollCount(const ScenarioResult& result) = 0;
+
  private:
   const string name_;
 };
@@ -93,6 +96,7 @@
   void ReportLatency(const ScenarioResult& result) override;
   void ReportTimes(const ScenarioResult& result) override;
   void ReportCpuUsage(const ScenarioResult& result) override;
+  void ReportPollCount(const ScenarioResult& result) override;
 
  private:
   std::vector<std::unique_ptr<Reporter> > reporters_;
@@ -109,6 +113,7 @@
   void ReportLatency(const ScenarioResult& result) override;
   void ReportTimes(const ScenarioResult& result) override;
   void ReportCpuUsage(const ScenarioResult& result) override;
+  void ReportPollCount(const ScenarioResult& result) override;
 };
 
 /** Dumps the report to a JSON file. */
@@ -123,6 +128,7 @@
   void ReportLatency(const ScenarioResult& result) override;
   void ReportTimes(const ScenarioResult& result) override;
   void ReportCpuUsage(const ScenarioResult& result) override;
+  void ReportPollCount(const ScenarioResult& result) override;
 
   const string report_file_;
 };
@@ -138,6 +144,7 @@
   void ReportLatency(const ScenarioResult& result) override;
   void ReportTimes(const ScenarioResult& result) override;
   void ReportCpuUsage(const ScenarioResult& result) override;
+  void ReportPollCount(const ScenarioResult& result) override;
 
   std::unique_ptr<ReportQpsScenarioService::Stub> stub_;
 };
diff --git a/test/cpp/qps/server.h b/test/cpp/qps/server.h
index 8fbf37a..a03dd1a 100644
--- a/test/cpp/qps/server.h
+++ b/test/cpp/qps/server.h
@@ -38,6 +38,7 @@
 #include <grpc/support/cpu.h>
 #include <vector>
 
+#include "src/core/lib/surface/completion_queue.h"
 #include "src/proto/grpc/testing/control.pb.h"
 #include "src/proto/grpc/testing/messages.pb.h"
 #include "test/core/end2end/data/ssl_test_data.h"
@@ -49,7 +50,8 @@
 
 class Server {
  public:
-  explicit Server(const ServerConfig& config) : timer_(new UsageTimer) {
+  explicit Server(const ServerConfig& config)
+      : timer_(new UsageTimer), last_reset_poll_count_(0) {
     cores_ = gpr_cpu_num_cores();
     if (config.port()) {
       port_ = config.port();
@@ -62,10 +64,13 @@
 
   ServerStats Mark(bool reset) {
     UsageTimer::Result timer_result;
+    int cur_poll_count = GetPollCount();
+    int poll_count = cur_poll_count - last_reset_poll_count_;
     if (reset) {
       std::unique_ptr<UsageTimer> timer(new UsageTimer);
       timer.swap(timer_);
       timer_result = timer->Mark();
+      last_reset_poll_count_ = cur_poll_count;
     } else {
       timer_result = timer_->Mark();
     }
@@ -76,6 +81,7 @@
     stats.set_time_user(timer_result.user);
     stats.set_total_cpu_time(timer_result.total_cpu_time);
     stats.set_idle_cpu_time(timer_result.idle_cpu_time);
+    stats.set_cq_poll_count(poll_count);
     return stats;
   }
 
@@ -106,10 +112,16 @@
     }
   }
 
+  virtual int GetPollCount() {
+    // For sync server.
+    return 0;
+  }
+
  private:
   int port_;
   int cores_;
   std::unique_ptr<UsageTimer> timer_;
+  int last_reset_poll_count_;
 };
 
 std::unique_ptr<Server> CreateSynchronousServer(const ServerConfig& config);
diff --git a/test/cpp/qps/server_async.cc b/test/cpp/qps/server_async.cc
index 84f1579..3403ffd 100644
--- a/test/cpp/qps/server_async.cc
+++ b/test/cpp/qps/server_async.cc
@@ -186,6 +186,14 @@
     shutdown_thread.join();
   }
 
+  int GetPollCount() override {
+    int count = 0;
+    for (auto cq = srv_cqs_.begin(); cq != srv_cqs_.end(); cq++) {
+      count += grpc_get_cq_poll_num((*cq)->cq());
+    }
+    return count;
+  }
+
  private:
   void ShutdownThreadFunc() {
     // TODO (vpai): Remove this deadline and allow Shutdown to finish properly
diff --git a/test/cpp/util/BUILD b/test/cpp/util/BUILD
index 9dde22b..453e9b6 100644
--- a/test/cpp/util/BUILD
+++ b/test/cpp/util/BUILD
@@ -29,16 +29,20 @@
 
 licenses(["notice"])  # 3-clause BSD
 
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_binary")
+
+package(default_visibility = ["//visibility:public"])
+
 # The following builds a shared-object to confirm that grpc++_unsecure
 # builds properly. Build-only is sufficient here
-cc_binary(
+grpc_cc_binary(
     name = "testso.so",
     srcs = [],
     linkshared = 1,
     deps = ["//:grpc++_unsecure"],
 )
 
-cc_library(
+grpc_cc_library(
     name = "test_config",
     srcs = [
         "test_config_cc.cc",
@@ -46,14 +50,15 @@
     hdrs = [
         "test_config.h",
     ],
-    visibility = ["//test:__subpackages__"],
+    external_deps = [
+        "gflags",
+    ],
     deps = [
         "//:gpr",
-        "//external:gflags",
     ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "grpc++_proto_reflection_desc_db",
     srcs = [
         "proto_reflection_descriptor_database.cc",
@@ -61,14 +66,13 @@
     hdrs = [
         "proto_reflection_descriptor_database.h",
     ],
-    visibility = ["//test:__subpackages__"],
     deps = [
         "//:grpc++_config_proto",
         "//src/proto/grpc/reflection/v1alpha:reflection_proto",
     ],
 )
 
-cc_library(
+grpc_cc_library(
     name = "test_util",
     srcs = [
         "byte_buffer_proto_helper.cc",
@@ -84,12 +88,57 @@
         "subprocess.h",
         "test_credentials_provider.h",
     ],
-    visibility = ["//test:__subpackages__"],
     deps = [
         "//:grpc++",
         "//test/core/end2end:ssl_test_data",
         "//test/core/util:gpr_test_util",
     ],
+    external_deps = [
+        "protobuf",
+    ],
+)
+
+grpc_cc_library(
+    name = "grpc_cli_libs",
+    srcs = [
+        "cli_call.cc",
+        "cli_credentials.cc",
+        "grpc_tool.cc",
+        "proto_file_parser.cc",
+        "service_describer.cc",
+    ],
+    hdrs = [
+        "cli_call.h",
+        "cli_credentials.h",
+        "config_grpc_cli.h",
+        "grpc_tool.h",
+        "proto_file_parser.h",
+        "service_describer.h",
+    ],
+    deps = [
+        "//:grpc++",
+        "//src/proto/grpc/reflection/v1alpha:reflection_proto",
+        ":grpc++_proto_reflection_desc_db",
+    ],
+    external_deps = [
+        "gflags",
+        "protobuf",
+        "protobuf_clib",
+    ],
+)
+
+grpc_cc_library(
+    name = "metrics_server_lib",
+    srcs = [
+        "metrics_server.cc",
+    ],
+    hdrs = [
+        "metrics_server.h",
+    ],
+    deps = [
+        "//src/proto/grpc/testing:metrics_proto",
+        "//:grpc++",
+    ],
 )
 
 cc_test(
diff --git a/test/distrib/csharp/run_distrib_test.bat b/test/distrib/csharp/run_distrib_test.bat
index cb5dd55..aeadef3 100644
--- a/test/distrib/csharp/run_distrib_test.bat
+++ b/test/distrib/csharp/run_distrib_test.bat
@@ -31,7 +31,7 @@
 cd /d %~dp0
 
 @rem extract input artifacts
-powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::ExtractToDirectory('../../../input_artifacts/csharp_nugets_windows_dotnetcli.zip', 'TestNugetFeed');"
+powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::ExtractToDirectory('../../../../input_artifacts/csharp_nugets_windows_dotnetcli.zip', 'TestNugetFeed');"
 
 update_version.sh auto
 
diff --git a/tools/grpcz/BUILD b/tools/dockerfile/grpc_artifact_linux_armv6/Dockerfile
similarity index 67%
copy from tools/grpcz/BUILD
copy to tools/dockerfile/grpc_artifact_linux_armv6/Dockerfile
index cc887a5..b085dd0 100644
--- a/tools/grpcz/BUILD
+++ b/tools/dockerfile/grpc_artifact_linux_armv6/Dockerfile
@@ -27,37 +27,13 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-licenses(["notice"])  # 3-clause BSD
+# Docker file for building gRPC Raspbian binaries
 
-package(default_visibility = ["//visibility:public"])
+FROM quay.io/grpc/raspbian_armv6
 
-load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
-
-grpc_proto_library(
-    name = "monitoring_proto",
-    srcs = [
-        "monitoring.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-    deps = [
-        ":census_proto",
-    ],
-)
-
-grpc_proto_library(
-    name = "census_proto",
-    srcs = [
-        "census.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-)
-
-cc_binary(
-    name = "grpcz_client",
-    srcs = ["grpcz_client.cc"],
-    deps = [
-        "monitoring_proto",
-        "//external:gflags",
-        "@mongoose_repo//:mongoose_lib",
-    ],
-)
+# Place any extra build instructions between these commands
+# Recommend modifying upstream docker image (quay.io/grpc/raspbian_armv6)
+# for build steps because running them under QEMU is very slow
+# (https://github.com/kpayson64/armv7hf-debian-qemu)
+# RUN [ "cross-build-start" ]
+# RUN [ "cross-build-end" ]
diff --git a/tools/grpcz/BUILD b/tools/dockerfile/grpc_artifact_linux_armv7/Dockerfile
similarity index 67%
copy from tools/grpcz/BUILD
copy to tools/dockerfile/grpc_artifact_linux_armv7/Dockerfile
index cc887a5..d7759a6 100644
--- a/tools/grpcz/BUILD
+++ b/tools/dockerfile/grpc_artifact_linux_armv7/Dockerfile
@@ -27,37 +27,13 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-licenses(["notice"])  # 3-clause BSD
+# Docker file for building gRPC Raspbian binaries
 
-package(default_visibility = ["//visibility:public"])
+FROM quay.io/grpc/raspbian_armv7
 
-load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
-
-grpc_proto_library(
-    name = "monitoring_proto",
-    srcs = [
-        "monitoring.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-    deps = [
-        ":census_proto",
-    ],
-)
-
-grpc_proto_library(
-    name = "census_proto",
-    srcs = [
-        "census.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-)
-
-cc_binary(
-    name = "grpcz_client",
-    srcs = ["grpcz_client.cc"],
-    deps = [
-        "monitoring_proto",
-        "//external:gflags",
-        "@mongoose_repo//:mongoose_lib",
-    ],
-)
+# Place any extra build instructions between these commands
+# Recommend modifying upstream docker image (quay.io/grpc/raspbian_armv7)
+# for build steps because running them under QEMU is very slow
+# (https://github.com/kpayson64/armv7hf-debian-qemu)
+# RUN [ "cross-build-start" ]
+# RUN [ "cross-build-end" ]
diff --git a/tools/dockerfile/push_testing_images.sh b/tools/dockerfile/push_testing_images.sh
index 973e045..16e43a1 100755
--- a/tools/dockerfile/push_testing_images.sh
+++ b/tools/dockerfile/push_testing_images.sh
@@ -44,7 +44,7 @@
 
 DOCKERHUB_ORGANIZATION=grpctesting
 
-for DOCKERFILE_DIR in tools/dockerfile/test/*
+for DOCKERFILE_DIR in tools/dockerfile/test/* tools/dockerfile/grpc_artifact_*
 do
   # Generate image name based on Dockerfile checksum. That works well as long
   # as can count on dockerfiles being written in a way that changing the logical 
diff --git a/tools/dockerfile/test/bazel/Dockerfile b/tools/dockerfile/test/bazel/Dockerfile
index 6ea8ef3..c562704 100644
--- a/tools/dockerfile/test/bazel/Dockerfile
+++ b/tools/dockerfile/test/bazel/Dockerfile
@@ -27,46 +27,22 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-FROM ubuntu:15.10
+FROM gcr.io/oss-fuzz-base/base-builder
 
-# Install Git and basic packages.
-RUN apt-get update && apt-get install -y \
+# Install basic packages and Bazel dependencies.
+RUN apt-get update && apt-get install -y software-properties-common python-software-properties
+RUN add-apt-repository ppa:webupd8team/java
+RUN apt-get update && apt-get -y install \
   autoconf \
-  autotools-dev \
   build-essential \
-  bzip2 \
-  ccache \
   curl \
-  gcc \
-  gcc-multilib \
-  git \
-  golang \
-  gyp \
-  lcov \
-  libc6 \
-  libc6-dbg \
-  libc6-dev \
-  libgtest-dev \
   libtool \
   make \
-  perl \
-  strace \
-  python-dev \
-  python-setuptools \
-  python-yaml \
-  telnet \
-  unzip \
-  wget \
-  zip && apt-get clean
-
-#================
-# Build profiling
-RUN apt-get update && apt-get install -y time && apt-get clean
-
+  openjdk-8-jdk \
+  vim
 
 #========================
 # Bazel installation
-RUN apt-get install -y software-properties-common g++
 RUN echo "deb [arch=amd64] http://storage.googleapis.com/bazel-apt stable jdk1.8" > /etc/apt/sources.list.d/bazel.list
 RUN curl https://bazel.build/bazel-release.pub.gpg | apt-key add -
 RUN apt-get -y update
diff --git a/tools/dockerfile/test/cxx_alpine_x64/Dockerfile b/tools/dockerfile/test/cxx_alpine_x64/Dockerfile
index f946875..b13157f 100644
--- a/tools/dockerfile/test/cxx_alpine_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_alpine_x64/Dockerfile
@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-FROM alpine:3.3
+FROM alpine:3.5
 
 # Install Git and basic packages.
 RUN apk update && apk add \
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 1d2aa95..b6f2857 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -792,7 +792,9 @@
 doc/status_ordering.md \
 doc/statuscodes.md \
 doc/stress_test_framework.md \
+doc/unit_testing.md \
 doc/wait-for-ready.md \
+doc/workarounds.md \
 include/grpc++/alarm.h \
 include/grpc++/channel.h \
 include/grpc++/client_context.h \
@@ -897,7 +899,8 @@
 include/grpc/load_reporting.h \
 include/grpc/slice.h \
 include/grpc/slice_buffer.h \
-include/grpc/status.h
+include/grpc/status.h \
+include/grpc/support/workaround_list.h
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 3214179..5242172 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -792,7 +792,9 @@
 doc/status_ordering.md \
 doc/statuscodes.md \
 doc/stress_test_framework.md \
+doc/unit_testing.md \
 doc/wait-for-ready.md \
+doc/workarounds.md \
 include/grpc++/alarm.h \
 include/grpc++/channel.h \
 include/grpc++/client_context.h \
@@ -899,6 +901,7 @@
 include/grpc/slice.h \
 include/grpc/slice_buffer.h \
 include/grpc/status.h \
+include/grpc/support/workaround_list.h \
 src/core/lib/channel/channel_args.c \
 src/core/lib/channel/channel_args.h \
 src/core/lib/channel/channel_stack.c \
@@ -953,6 +956,7 @@
 src/core/lib/iomgr/ev_poll_posix.h \
 src/core/lib/iomgr/ev_posix.c \
 src/core/lib/iomgr/ev_posix.h \
+src/core/lib/iomgr/ev_windows.c \
 src/core/lib/iomgr/exec_ctx.c \
 src/core/lib/iomgr/exec_ctx.h \
 src/core/lib/iomgr/executor.c \
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index c3bfc6c..c5ae421 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -792,7 +792,9 @@
 doc/status_ordering.md \
 doc/statuscodes.md \
 doc/stress_test_framework.md \
+doc/unit_testing.md \
 doc/wait-for-ready.md \
+doc/workarounds.md \
 include/grpc/byte_buffer.h \
 include/grpc/byte_buffer_reader.h \
 include/grpc/census.h \
@@ -860,7 +862,8 @@
 include/grpc/support/tls_gcc.h \
 include/grpc/support/tls_msvc.h \
 include/grpc/support/tls_pthread.h \
-include/grpc/support/useful.h
+include/grpc/support/useful.h \
+include/grpc/support/workaround_list.h
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 097cbde..eb0883b 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -792,7 +792,9 @@
 doc/status_ordering.md \
 doc/statuscodes.md \
 doc/stress_test_framework.md \
+doc/unit_testing.md \
 doc/wait-for-ready.md \
+doc/workarounds.md \
 include/grpc/byte_buffer.h \
 include/grpc/byte_buffer_reader.h \
 include/grpc/census.h \
@@ -861,6 +863,7 @@
 include/grpc/support/tls_msvc.h \
 include/grpc/support/tls_pthread.h \
 include/grpc/support/useful.h \
+include/grpc/support/workaround_list.h \
 src/core/README.md \
 src/core/ext/README.md \
 src/core/ext/census/README.md \
@@ -975,6 +978,10 @@
 src/core/ext/filters/max_age/max_age_filter.h \
 src/core/ext/filters/message_size/message_size_filter.c \
 src/core/ext/filters/message_size/message_size_filter.h \
+src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c \
+src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h \
+src/core/ext/filters/workarounds/workaround_utils.c \
+src/core/ext/filters/workarounds/workaround_utils.h \
 src/core/ext/transport/README.md \
 src/core/ext/transport/chttp2/README.md \
 src/core/ext/transport/chttp2/alpn/alpn.c \
@@ -1092,6 +1099,7 @@
 src/core/lib/iomgr/ev_poll_posix.h \
 src/core/lib/iomgr/ev_posix.c \
 src/core/lib/iomgr/ev_posix.h \
+src/core/lib/iomgr/ev_windows.c \
 src/core/lib/iomgr/exec_ctx.c \
 src/core/lib/iomgr/exec_ctx.h \
 src/core/lib/iomgr/executor.c \
diff --git a/tools/gce/create_linux_worker.sh b/tools/gce/create_linux_worker.sh
index 322a592c..b934f22 100755
--- a/tools/gce/create_linux_worker.sh
+++ b/tools/gce/create_linux_worker.sh
@@ -45,7 +45,8 @@
     --machine-type n1-standard-16 \
     --image=ubuntu-1510 \
     --image-project=grpc-testing \
-    --boot-disk-size 1000
+    --boot-disk-size 1000 \
+    --scopes https://www.googleapis.com/auth/bigquery
 
 echo 'Created GCE instance, waiting 60 seconds for it to come online.'
 sleep 60
diff --git a/tools/grpcz/census.proto b/tools/grpcz/census.proto
deleted file mode 100644
index d1ff694..0000000
--- a/tools/grpcz/census.proto
+++ /dev/null
@@ -1,318 +0,0 @@
-// Copyright 2017, Google Inc.
-// 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.
-
-//TODO(ericgribkoff) Depend on this directly from the instrumentation-proto
-//repository.
-
-syntax = "proto3";
-
-package google.instrumentation;
-
-option java_package = "com.google.instrumentation.stats.proto";
-option java_outer_classname = "CensusProto";
-
-// All the census protos.
-//
-// Nomenclature notes:
-//   * Capitalized names below (like View) are protos.
-//   * Protos which describe types are named with a Descriptor suffix (e.g.
-//     MesurementDescriptor).
-//
-// Census lets you define the type and description of the data being measured
-// (e.g. the latency of an RPC or the number of CPU cycles spent on an
-// operation using MeasurementDescriptor. As individual measurements (a double
-// value) for are recorded, they are aggregated together into an
-// Aggregation. There are two Aggregation types available: Distribution
-// (describes the distribution of all measurements, possibly with a histogram)
-// and IntervalStats (the count and mean of measurements across specified time
-// periods). An Aggregation is described by an AggregationDescriptor.
-//
-// You can define how your measurements (described by a MeasurementDescriptor)
-// are broken down by Tag values and which Aggregations to use through a
-// ViewDescriptor. The output (all measurements broken down by tag values into
-// specific Aggregations) is called a View.
-
-
-// The following two types are copied from
-// google/protobuf/{duration,timestamp}.proto. Ideally, we would be able to
-// import them, but this causes compilation issues on C-based systems
-// (e.g. https://koti.kapsi.fi/jpa/nanopb/), which cannot process the C++
-// headers generated from the standard protobuf distribution. See the relevant
-// proto files for full documentation of these types.
-
-message Duration {
-  // Signed seconds of the span of time. Must be from -315,576,000,000
-  // to +315,576,000,000 inclusive.
-  int64 seconds = 1;
-
-  // Signed fractions of a second at nanosecond resolution of the span
-  // of time. Durations less than one second are represented with a 0
-  // `seconds` field and a positive or negative `nanos` field. For durations
-  // of one second or more, a non-zero value for the `nanos` field must be
-  // of the same sign as the `seconds` field. Must be from -999,999,999
-  // to +999,999,999 inclusive.
-  int32 nanos = 2;
-}
-
-message Timestamp {
-  // Represents seconds of UTC time since Unix epoch
-  // 1970-01-01T00:00:00Z. Must be from from 0001-01-01T00:00:00Z to
-  // 9999-12-31T23:59:59Z inclusive.
-  int64 seconds = 1;
-
-  // Non-negative fractions of a second at nanosecond resolution. Negative
-  // second values with fractions must still have non-negative nanos values
-  // that count forward in time. Must be from 0 to 999,999,999
-  // inclusive.
-  int32 nanos = 2;
-}
-
-// MeasurementDescriptor describes a data point (measurement) type.
-message MeasurementDescriptor {
-  // A descriptive name, e.g. rpc_latency, cpu. Must be unique.
-  string name = 1;
-
-  // More detailed description of the resource, used in documentation.
-  string description = 2;
-
-  // Fundamental units of measurement supported by Census
-  // TODO(aveitch): expand this to include other S.I. units?
-  enum BasicUnit {
-    UNKNOWN = 0;    // Implementations should not use this
-    SCALAR = 1;     // Dimensionless
-    BITS = 2;       // A single bit
-    BYTES = 3;      // An 8-bit byte
-    SECONDS = 4;    // S.I. unit
-    CORES = 5;      // CPU core usage
-    MAX_UNITS = 6;  // Last defined value; implementations should only use
-                    // this for validation.
-  }
-
-  // MeasurementUnit lets you build compound units of the form
-  //   10^n * (A * B * ...) / (X * Y * ...),
-  // where the elements in the numerator and denominator are all BasicUnits.  A
-  // MeasurementUnit must have at least one BasicUnit in its numerator.
-  //
-  // To specify multiplication in the numerator or denominator, simply specify
-  // multiple numerator or denominator fields.  For example:
-  //
-  // - byte-seconds (i.e. bytes * seconds):
-  //     numerator: BYTES
-  //     numerator: SECS
-  //
-  // - events/sec^2 (i.e. rate of change of events/sec):
-  //     numerator: SCALAR
-  //     denominator: SECS
-  //     denominator: SECS
-  //
-  // To specify multiples (in power of 10) of units, specify a non-zero
-  // 'power10' value, for example:
-  //
-  // - MB/s (i.e. megabytes / s):
-  //     power10: 6
-  //     numerator: BYTES
-  //     denominator: SECS
-  //
-  // - nanoseconds
-  //     power10: -9
-  //     numerator: SECS
-  message MeasurementUnit {
-    int32 power10 = 1;
-    repeated BasicUnit numerators = 2;
-    repeated BasicUnit denominators = 3;
-  }
-
-  // The units used by this type of measurement.
-  MeasurementUnit unit = 3;
-}
-
-// An aggregation summarizes a series of individual measurements. There are
-// two types of aggregation (IntervalAggregation and DistributionAggregation),
-// unique types of each can be set using descriptors for each.
-
-// DistributionAggregation contains summary statistics for a population of
-// values and, optionally, a histogram representing the distribution of those
-// values across a specified set of histogram buckets, as defined in
-// DistributionAggregationDescriptor.bucket_bounds.
-//
-// The summary statistics are the count, mean, minimum, and the maximum of the
-// set of population of values.
-//
-// Although it is not forbidden, it is generally a bad idea to include
-// non-finite values (infinities or NaNs) in the population of values, as this
-// will render the `mean` field meaningless.
-message DistributionAggregation {
-  // The number of values in the population. Must be non-negative.
-  int64 count = 1;
-
-  // The arithmetic mean of the values in the population. If `count` is zero
-  // then this field must be zero.
-  double mean = 2;
-
-  // The sum of the values in the population.  If `count` is zero then this
-  // field must be zero.
-  double sum = 3;
-
-  // Describes a range of population values.
-  message Range {
-    // The minimum of the population values.
-    double min = 1;
-    // The maximum of the population values.
-    double max = 2;
-  }
-
-  // The range of the population values. If `count` is zero, this field will not
-  // be defined.
-  Range range = 4;
-
-  // A Distribution may optionally contain a histogram of the values in the
-  // population. The histogram is given in `bucket_count` as counts of values
-  // that fall into one of a sequence of non-overlapping buckets, as described
-  // by `DistributionAggregationDescriptor.bucket_boundaries`. The sum of the
-  // values in `bucket_counts` must equal the value in `count`.
-  //
-  // Bucket counts are given in order under the numbering scheme described
-  // above (the underflow bucket has number 0; the finite buckets, if any,
-  // have numbers 1 through N-2; the overflow bucket has number N-1).
-  //
-  // The size of `bucket_count` must be no greater than N as defined in
-  // `bucket_boundaries`.
-  //
-  // Any suffix of trailing zero bucket_count fields may be omitted.
-  repeated int64 bucket_counts = 5;
-
-  // Tags associated with this DistributionAggregation. These will be filled
-  // in based on the View specification.
-  repeated Tag tags = 6;
-}
-
-message DistributionAggregationDescriptor {
-  // A Distribution may optionally contain a histogram of the values in the
-  // population. The bucket boundaries for that histogram are described by
-  // `bucket_bounds`. This defines `size(bucket_bounds) + 1` (= N)
-  // buckets. The boundaries for bucket index i are:
-  //
-  // [-infinity, bucket_bounds[i]) for i == 0
-  // [bucket_bounds[i-1], bucket_bounds[i]) for 0 < i < N-2
-  // [bucket_bounds[i-1], +infinity) for i == N-1
-  //
-  // i.e. an underflow bucket (number 0), zero or more finite buckets (1
-  // through N - 2, and an overflow bucket (N - 1), with inclusive lower
-  // bounds and exclusive upper bounds.
-  //
-  // If `bucket_bounds` has no elements (zero size), then there is no
-  // histogram associated with the Distribution. If `bucket_bounds` has only
-  // one element, there are no finite buckets, and that single element is the
-  // common boundary of the overflow and underflow buckets. The values must
-  // be monotonically increasing.
-  repeated double bucket_bounds = 1;
-}
-
-// An IntervalAggreation records summary stats over various time
-// windows. These stats are approximate, with the degree of accuracy
-// controlled by setting the n_sub_intervals parameter in the
-// IntervalAggregationDescriptor.
-message IntervalAggregation {
-  // Summary statistic over a single time interval.
-  message Interval {
-    // The interval duration. Must be positive.
-    Duration interval_size = 1;
-    // Approximate number of measurements recorded in this interval.
-    double count = 2;
-    // The cumulative sum of measurements in this interval.
-    double sum = 3;
-  }
-
-  // Full set of intervals for this aggregation.
-  repeated Interval intervals = 1;
-
-  // Tags associated with this IntervalAggregation. These will be filled in
-  // based on the View specification.
-  repeated Tag tags = 2;
-}
-
-// An IntervalAggreationDescriptor specifies time intervals for an
-// IntervalAggregation.
-message IntervalAggregationDescriptor {
-  // Number of internal sub-intervals to use when collecting stats for each
-  // interval. The max error in interval measurements will be approximately
-  // 1/n_sub_intervals (although in practice, this will only be approached in
-  // the presence of very large and bursty workload changes), and underlying
-  // memory usage will be roughly proportional to the value of this
-  // field. Must be in the range [2, 20]. A value of 5 will be used if this is
-  // unspecified.
-  int32 n_sub_intervals = 1;
-
-  // The size of each interval, as a time duration. Must have at least one
-  // element.
-  repeated Duration interval_sizes = 2;
-}
-
-// A Tag: key-value pair.
-message Tag {
-  string key = 1;
-  string value = 2;
-}
-
-// A ViewDescriptor specifies an AggregationDescriptor and a set of tag
-// keys. Views instantiated from this descriptor will contain Aggregations
-// broken down by the unique set of matching tag values for each measurement.
-message ViewDescriptor {
-  // Name of view. Must be unique.
-  string name = 1;
-
-  // More detailed description, for documentation purposes.
-  string description = 2;
-
-  // Name of a MeasurementDescriptor to be used for this view.
-  string measurement_descriptor_name = 3;
-
-  // Aggregation type to associate with View.
-  oneof aggregation {
-    IntervalAggregationDescriptor interval_aggregation = 4;
-    DistributionAggregationDescriptor distribution_aggregation = 5;
-  }
-
-  // Tag keys to match with a given measurement. If no keys are specified,
-  // then all stats are recorded. Keys must be unique.
-  repeated string tag_keys = 6;
-}
-
-// DistributionView contains all aggregations for a view specified using a
-// DistributionAggregationDescriptor.
-message DistributionView {
-  // Aggregations - each will have a unique set of tag values for the tag_keys
-  // associated with the corresponding View.
-  repeated DistributionAggregation aggregations = 1;
-
-  // Start and end timestamps over which aggregations was accumulated.
-  Timestamp start = 2;
-  Timestamp end = 3;
-}
-
-// IntervalView contains all aggregations for a view specified using a
-// IntervalAggregationDescriptor.
-message IntervalView {
-  // Aggregations - each will have a unique set of tag values for the tag_keys
-  // associated with the corresponding View.
-  repeated IntervalAggregation aggregations = 1;
-}
-
-// A View contains the aggregations based on a ViewDescriptor.
-message View {
-  // ViewDescriptor name associated with this set of View.
-  string view_name = 1;
-
-  oneof view {
-    DistributionView distribution_view = 2;
-    IntervalView interval_view = 3;
-  }
-}
diff --git a/tools/grpcz/grpcz_client.cc b/tools/grpcz/grpcz_client.cc
deleted file mode 100644
index a5e66f7..0000000
--- a/tools/grpcz/grpcz_client.cc
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
- *
- * Copyright 2017, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <string>
-
-#include <google/protobuf/util/json_util.h>
-#include <grpc++/grpc++.h>
-#include <grpc/support/log.h>
-
-#include "gflags/gflags.h"
-/* #include "mongoose.h" */
-
-// TODO (makdharma): remove local copies of these protos
-#include "tools/grpcz/census.grpc.pb.h"
-#include "tools/grpcz/monitoring.grpc.pb.h"
-
-DEFINE_string(
-    grpcz_server, "127.0.0.1:8080",
-    "Unix domain socket path (e.g. unix://tmp/grpcz.sock) or IP address"
-    "(host:port) where grpcz server is running.");
-DEFINE_string(http_port, "8000",
-              "Port id for accessing the HTTP server that renders /grpcz page");
-DEFINE_bool(print_to_console, false,
-            "print the JSON retreived from grpcz server and quit");
-
-using grpc::Channel;
-using grpc::ClientContext;
-using grpc::Status;
-
-using ::grpc::instrumentation::v1alpha::CanonicalRpcStats;
-using ::grpc::instrumentation::v1alpha::Monitoring;
-
-static const std::string static_html_header =
-    "<!DOCTYPE html> <html> <head> <style> \
-table { border-collapse: collapse; width: 100%; } \
-table, td, th { border: 1px solid black; } \
-</style> </head> <body>\
-<div id='stats' data-stats='";
-
-static const std::string static_html_footer =
-    "' class='hidden'></div>\
-<h1>GRPCZ Statistics</h1> <div id='table'> </div> \
-<script> \
-  var canonical_stats = JSON.parse(\
-            document.getElementById('stats').getAttribute('data-stats')); \
-  var table = document.createElement('table'); \
-  if (canonical_stats['Error Message'] != undefined) { \
-     document.getElementById('table').innerHTML = canonical_stats['Error Message']; } \
-  else {\
-  for (var key in canonical_stats) { \
-    name = canonical_stats[key]['view']['viewName']; \
-    distribution = canonical_stats[key]['view']['distributionView']; \
-    interval = canonical_stats[key]['view']['intervalView']; \
-    value = (interval == undefined) ? \
-      JSON.stringify(distribution, null, ' ') : \
-      JSON.stringify(interval, null, ' '); \
-    var row = table.insertRow(-1); \
-    var col1 = row.insertCell(0); \
-    var col2 = row.insertCell(1); \
-    col1.innerHTML = name; \
-    col2.innerHTML = '<pre>' + value + '</pre>'; \
-  } \
-  document.getElementById('table').appendChild(table); \
-  }\
-</script> </body> </html>";
-
-class GrpczClient {
- public:
-  GrpczClient(std::shared_ptr<Channel> channel)
-      : stub_(Monitoring::NewStub(channel)) {}
-
-  std::string GetStatsAsJson() {
-    const ::google::protobuf::Empty request;
-    CanonicalRpcStats reply;
-    ClientContext context;
-    Status status = stub_->GetCanonicalRpcStats(&context, request, &reply);
-
-    if (status.ok()) {
-      std::string json_str;
-      ::google::protobuf::util::MessageToJsonString(reply, &json_str);
-      return json_str;
-    } else {
-      static const std::string error_message_json =
-          "{\"Error Message\":\"" + status.error_message() + "\"}";
-      gpr_log(GPR_DEBUG, "%d: %s", status.error_code(),
-              status.error_message().c_str());
-      return error_message_json;
-    }
-  }
-
- private:
-  std::unique_ptr<Monitoring::Stub> stub_;
-};
-
-std::unique_ptr<GrpczClient> g_grpcz_client;
-/*
-static struct mg_serve_http_opts s_http_server_opts;
-
-static void ev_handler(struct mg_connection *nc, int ev, void *p) {
-  if (ev == MG_EV_HTTP_REQUEST) {
-    mg_serve_http(nc, (struct http_message *)p, s_http_server_opts);
-  }
-}
-
-static void grpcz_handler(struct mg_connection *nc, int ev, void *ev_data) {
-  (void)ev;
-  (void)ev_data;
-  gpr_log(GPR_INFO, "fetching grpcz stats from %s", FLAGS_grpcz_server.c_str());
-  std::string json_str = g_grpcz_client->GetStatsAsJson();
-  std::string rendered_html =
-      static_html_header + json_str + static_html_footer;
-  mg_printf(nc, "HTTP/1.0 200 OK\r\n\r\n%s", rendered_html.c_str());
-  nc->flags |= MG_F_SEND_AND_CLOSE;
-}
-*/
-
-int main(int argc, char **argv) {
-  gflags::ParseCommandLineFlags(&argc, &argv, true);
-
-  // Create a client
-  g_grpcz_client.reset(new GrpczClient(grpc::CreateChannel(
-      FLAGS_grpcz_server, grpc::InsecureChannelCredentials())));
-  if (FLAGS_print_to_console) {
-    // using GPR_ERROR since this is the default verbosity. _DEBUG or _INFO
-    // won't print unless GRPC_VERBOSITY env var is set appropriately, which
-    // might confuse users of this utility.
-    gpr_log(GPR_ERROR, "%s\n", g_grpcz_client->GetStatsAsJson().c_str());
-    return 0;
-  }
-
-  /*
-  // Set up a mongoose webserver handler
-  struct mg_mgr mgr;
-  mg_mgr_init(&mgr, NULL);
-  gpr_log(GPR_INFO, "Starting grpcz web server on port %s\n",
-          FLAGS_http_port.c_str());
-
-  struct mg_connection *nc = mg_bind(&mgr, FLAGS_http_port.c_str(), ev_handler);
-  if (nc == NULL) {
-    gpr_log(GPR_ERROR, "Failed to create listener on port %s\n",
-            FLAGS_http_port.c_str());
-    return -1;
-  }
-  mg_register_http_endpoint(nc, "/grpcz", grpcz_handler);
-  mg_set_protocol_http_websocket(nc);
-
-  // Poll in a loop and serve /grpcz pages
-  for (;;) {
-    static const int k_sleep_millis = 100;
-    mg_mgr_poll(&mgr, k_sleep_millis);
-  }
-  mg_mgr_free(&mgr);
-  */
-  return 0;
-}
diff --git a/tools/grpcz/monitoring.proto b/tools/grpcz/monitoring.proto
deleted file mode 100644
index fefcd7d..0000000
--- a/tools/grpcz/monitoring.proto
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2017, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file defines an interface for exporting monitoring information
-// out of gRPC servers.
-syntax = "proto3";
-
-// TODO(ericgribkoff) Figure out how to manage the external Census proto
-// dependency.
-import "tools/grpcz/census.proto";
-import "google/protobuf/any.proto";
-import "google/protobuf/empty.proto";
-
-package grpc.instrumentation.v1alpha;
-
-option java_multiple_files = true;
-option java_package = "io.grpc.instrumentation.v1alpha";
-option java_outer_classname = "MonitoringProto";
-
-service Monitoring {
-  // Return canonical RPC stats
-  rpc GetCanonicalRpcStats(google.protobuf.Empty) returns (CanonicalRpcStats) {
-  }
-
-  // Query the server for specific stats
-  rpc GetStats(StatsRequest) returns (StatsResponse) {
-  }
-
-  // Request the server to stream back snapshots of the requested stats
-  rpc WatchStats(StatsRequest) returns (stream StatsResponse) {
-  }
-
-
-  // Return request traces.
-  rpc GetRequestTraces(TraceRequest) returns(TraceResponse) {
-  // TODO(aveitch): Please define the messages here
-  }
-
-  // Return application-defined groups of monitoring data.
-  // This is a low level facility to allow extension of the monitoring API to
-  // application-specific monitoring data. Frameworks may use this to define
-  // additional groups of monitoring data made available by servers.
-  rpc GetCustomMonitoringData(MonitoringDataGroup)
-    returns (CustomMonitoringData) {
-  }
-
-}
-
-// Canonical RPC stats exported by gRPC.
-message CanonicalRpcStats {
-  StatsResponse rpc_client_errors = 1;
-  StatsResponse rpc_client_completed_rpcs = 2;
-  StatsResponse rpc_client_started_rpcs = 3;
-  StatsResponse rpc_client_elapsed_time = 4;
-  StatsResponse rpc_client_server_elapsed_time = 5;
-  StatsResponse rpc_client_request_bytes = 6;
-  StatsResponse rpc_client_response_bytes = 7;
-  StatsResponse rpc_client_request_count = 8;
-  StatsResponse rpc_client_response_count = 9;
-  StatsResponse rpc_server_errors = 10;
-  StatsResponse rpc_server_completed_rpcs = 11;
-  StatsResponse rpc_server_server_elapsed_time = 12;
-  StatsResponse rpc_server_request_bytes = 13;
-  StatsResponse rpc_server_response_bytes = 14;
-  StatsResponse rpc_server_request_count = 15;
-  StatsResponse rpc_server_response_count = 16;
-  StatsResponse rpc_server_elapsed_time = 17;
-  //TODO(ericgribkoff) Add minute-hour interval stats.
-}
-
-// This message is sent when requesting a set of stats (Census Views) from
-// a client system, as part of the MonitoringService API's.
-message StatsRequest {
-  // An optional set of ViewDescriptor names. Only Views using these
-  // descriptors will be sent back in the response. If no names are provided,
-  // then all Views present in the client system will be included in every
-  // response. If measurement_names is also provided, then Views matching the
-  // intersection of the two are returned.
-  // TODO(aveitch): Consider making this a list of regexes or prefix matches in
-  // the future.
-  repeated string view_names = 1;
-
-  // An optional set of MeasurementDescriptor names. Only Views using these
-  // descriptors will be sent back in the response. If no names are provided,
-  // then all Views present in the client system will be included in every
-  // response. If view_names is also provided, then Views matching the
-  // intersection of the two are returned.
-  // TODO(aveitch): Consider making this a list of regexes or prefix matches in
-  // the future.
-  repeated string measurement_names = 2;
-
-  // By default, the MeasurementDescriptors and ViewDescriptors corresponding to
-  // the Views that are returned in a StatsResponse will be included in the
-  // first such response. Set this to true to have them not sent.
-  bool dont_include_descriptors_in_first_response = 3;
-}
-
-// This message contains all information relevant to a single View. It is the
-// return type for GetStats and WatchStats, and used in CanonicalRpcStats.
-message StatsResponse {
-  // A StatsResponse can optionally contain the MeasurementDescriptor and
-  // ViewDescriptor for the View. These will be sent in the first WatchStats
-  // response, or all GetStats and GetCanonicalRpcStats responses. These will
-  // not be set for {Get,Watch}Stats if
-  // dont_include_descriptors_in_first_response is set to true in the
-  // StatsRequest.
-  google.instrumentation.MeasurementDescriptor measurement_descriptor = 1;
-  google.instrumentation.ViewDescriptor view_descriptor = 2;
-
-  // The View data.
-  google.instrumentation.View view = 3;
-}
-
-message TraceRequest {
-  // TODO(aveitch): Complete definition of this type
-}
-
-message TraceResponse {
-  // TODO(aveitch): Complete definition of this type
-}
-
-message MonitoringDataGroup {
-  string name = 1;  // name of a group of monitoring data
-}
-
-// The wrapper for custom monitoring data.
-message CustomMonitoringData {
-  // can be any application specific monitoring data
-  google.protobuf.Any contents = 1;
-}
diff --git a/tools/internal_ci/helper_scripts/prepare_build_linux_rc b/tools/internal_ci/helper_scripts/prepare_build_linux_rc
index c8cb5a0..7f6e093 100644
--- a/tools/internal_ci/helper_scripts/prepare_build_linux_rc
+++ b/tools/internal_ci/helper_scripts/prepare_build_linux_rc
@@ -33,6 +33,10 @@
 # Need to increase open files limit for c tests
 ulimit -n 32768
 
+# Move docker's storage location to scratch disk so we don't run out of space.
+echo 'DOCKER_OPTS="${DOCKER_OPTS} --graph=/tmpfs/docker"' | sudo tee --append /etc/default/docker
+sudo service docker restart
+
 # Download Docker images from DockerHub
 export DOCKERHUB_ORGANIZATION=grpctesting
 
diff --git a/tools/grpcz/BUILD b/tools/internal_ci/linux/grpc_build_artifacts.cfg
similarity index 67%
copy from tools/grpcz/BUILD
copy to tools/internal_ci/linux/grpc_build_artifacts.cfg
index cc887a5..eef969b 100644
--- a/tools/grpcz/BUILD
+++ b/tools/internal_ci/linux/grpc_build_artifacts.cfg
@@ -27,37 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-licenses(["notice"])  # 3-clause BSD
+# Config file for the internal CI (in protobuf text format)
 
-package(default_visibility = ["//visibility:public"])
-
-load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
-
-grpc_proto_library(
-    name = "monitoring_proto",
-    srcs = [
-        "monitoring.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-    deps = [
-        ":census_proto",
-    ],
-)
-
-grpc_proto_library(
-    name = "census_proto",
-    srcs = [
-        "census.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-)
-
-cc_binary(
-    name = "grpcz_client",
-    srcs = ["grpcz_client.cc"],
-    deps = [
-        "monitoring_proto",
-        "//external:gflags",
-        "@mongoose_repo//:mongoose_lib",
-    ],
-)
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_build_artifacts.sh"
+timeout_mins: 120
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/artifacts/**"
+  }
+}
diff --git a/tools/grpcz/BUILD b/tools/internal_ci/linux/grpc_build_artifacts.sh
old mode 100644
new mode 100755
similarity index 67%
copy from tools/grpcz/BUILD
copy to tools/internal_ci/linux/grpc_build_artifacts.sh
index cc887a5..1b12be1
--- a/tools/grpcz/BUILD
+++ b/tools/internal_ci/linux/grpc_build_artifacts.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 # Copyright 2017, Google Inc.
 # All rights reserved.
 #
@@ -27,37 +28,11 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-licenses(["notice"])  # 3-clause BSD
+set -ex
 
-package(default_visibility = ["//visibility:public"])
+# change to grpc repo root
+cd $(dirname $0)/../../..
 
-load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
+source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
-grpc_proto_library(
-    name = "monitoring_proto",
-    srcs = [
-        "monitoring.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-    deps = [
-        ":census_proto",
-    ],
-)
-
-grpc_proto_library(
-    name = "census_proto",
-    srcs = [
-        "census.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-)
-
-cc_binary(
-    name = "grpcz_client",
-    srcs = ["grpcz_client.cc"],
-    deps = [
-        "monitoring_proto",
-        "//external:gflags",
-        "@mongoose_repo//:mongoose_lib",
-    ],
-)
+tools/run_tests/task_runner.py -f artifact linux
diff --git a/tools/grpcz/BUILD b/tools/internal_ci/macos/grpc_build_artifacts.cfg
similarity index 67%
copy from tools/grpcz/BUILD
copy to tools/internal_ci/macos/grpc_build_artifacts.cfg
index cc887a5..4d25069 100644
--- a/tools/grpcz/BUILD
+++ b/tools/internal_ci/macos/grpc_build_artifacts.cfg
@@ -27,37 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-licenses(["notice"])  # 3-clause BSD
+# Config file for the internal CI (in protobuf text format)
 
-package(default_visibility = ["//visibility:public"])
-
-load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
-
-grpc_proto_library(
-    name = "monitoring_proto",
-    srcs = [
-        "monitoring.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-    deps = [
-        ":census_proto",
-    ],
-)
-
-grpc_proto_library(
-    name = "census_proto",
-    srcs = [
-        "census.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-)
-
-cc_binary(
-    name = "grpcz_client",
-    srcs = ["grpcz_client.cc"],
-    deps = [
-        "monitoring_proto",
-        "//external:gflags",
-        "@mongoose_repo//:mongoose_lib",
-    ],
-)
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/macos/grpc_build_artifacts.sh"
+timeout_mins: 120
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/artifacts/**"
+  }
+}
diff --git a/tools/grpcz/BUILD b/tools/internal_ci/macos/grpc_build_artifacts.sh
old mode 100644
new mode 100755
similarity index 67%
copy from tools/grpcz/BUILD
copy to tools/internal_ci/macos/grpc_build_artifacts.sh
index cc887a5..b4c118f
--- a/tools/grpcz/BUILD
+++ b/tools/internal_ci/macos/grpc_build_artifacts.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 # Copyright 2017, Google Inc.
 # All rights reserved.
 #
@@ -27,37 +28,11 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-licenses(["notice"])  # 3-clause BSD
+set -ex
 
-package(default_visibility = ["//visibility:public"])
+# change to grpc repo root
+cd $(dirname $0)/../../..
 
-load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
+git submodule update --init
 
-grpc_proto_library(
-    name = "monitoring_proto",
-    srcs = [
-        "monitoring.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-    deps = [
-        ":census_proto",
-    ],
-)
-
-grpc_proto_library(
-    name = "census_proto",
-    srcs = [
-        "census.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-)
-
-cc_binary(
-    name = "grpcz_client",
-    srcs = ["grpcz_client.cc"],
-    deps = [
-        "monitoring_proto",
-        "//external:gflags",
-        "@mongoose_repo//:mongoose_lib",
-    ],
-)
+tools/run_tests/task_runner.py -f artifact macos
diff --git a/tools/internal_ci/windows/grpc_build_artifacts.bat b/tools/internal_ci/windows/grpc_build_artifacts.bat
new file mode 100644
index 0000000..648f038
--- /dev/null
+++ b/tools/internal_ci/windows/grpc_build_artifacts.bat
@@ -0,0 +1,43 @@
+@rem Copyright 2017, Google Inc.
+@rem All rights reserved.
+@rem
+@rem Redistribution and use in source and binary forms, with or without
+@rem modification, are permitted provided that the following conditions are
+@rem met:
+@rem
+@rem     * Redistributions of source code must retain the above copyright
+@rem notice, this list of conditions and the following disclaimer.
+@rem     * Redistributions in binary form must reproduce the above
+@rem copyright notice, this list of conditions and the following disclaimer
+@rem in the documentation and/or other materials provided with the
+@rem distribution.
+@rem     * Neither the name of Google Inc. nor the names of its
+@rem contributors may be used to endorse or promote products derived from
+@rem this software without specific prior written permission.
+@rem
+@rem THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+@rem "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+@rem LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+@rem A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+@rem OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+@rem SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+@rem LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+@rem DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+@rem THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+@rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+@rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+@rem make sure msys binaries are preferred over cygwin binaries
+@rem set path to python 2.7
+set PATH=C:\tools\msys64\usr\bin;C:\Python27;%PATH%
+
+@rem enter repo root
+cd /d %~dp0\..\..\..
+
+git submodule update --init
+
+python tools/run_tests/task_runner.py -f artifact windows || goto :error
+goto :EOF
+
+:error
+exit /b %errorlevel%
diff --git a/tools/grpcz/BUILD b/tools/internal_ci/windows/grpc_build_artifacts.cfg
similarity index 67%
rename from tools/grpcz/BUILD
rename to tools/internal_ci/windows/grpc_build_artifacts.cfg
index cc887a5..8951181 100644
--- a/tools/grpcz/BUILD
+++ b/tools/internal_ci/windows/grpc_build_artifacts.cfg
@@ -27,37 +27,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-licenses(["notice"])  # 3-clause BSD
+# Config file for the internal CI (in protobuf text format)
 
-package(default_visibility = ["//visibility:public"])
-
-load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
-
-grpc_proto_library(
-    name = "monitoring_proto",
-    srcs = [
-        "monitoring.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-    deps = [
-        ":census_proto",
-    ],
-)
-
-grpc_proto_library(
-    name = "census_proto",
-    srcs = [
-        "census.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-)
-
-cc_binary(
-    name = "grpcz_client",
-    srcs = ["grpcz_client.cc"],
-    deps = [
-        "monitoring_proto",
-        "//external:gflags",
-        "@mongoose_repo//:mongoose_lib",
-    ],
-)
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/windows/grpc_build_artifacts.bat"
+timeout_mins: 120
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "github/grpc/artifacts/**"
+  }
+}
diff --git a/tools/run_tests/artifacts/artifact_targets.py b/tools/run_tests/artifacts/artifact_targets.py
index c90da06..e3658ac 100644
--- a/tools/run_tests/artifacts/artifact_targets.py
+++ b/tools/run_tests/artifacts/artifact_targets.py
@@ -41,10 +41,11 @@
 
 def create_docker_jobspec(name, dockerfile_dir, shell_command, environ={},
                    flake_retries=0, timeout_retries=0, timeout_seconds=30*60,
-                   docker_base_image=None):
+                   docker_base_image=None, extra_docker_args=None):
   """Creates jobspec for a task running under docker."""
   environ = environ.copy()
   environ['RUN_COMMAND'] = shell_command
+  environ['ARTIFACTS_OUT'] = 'artifacts/%s' % name
 
   docker_args=[]
   for k,v in environ.items():
@@ -55,6 +56,8 @@
 
   if docker_base_image is not None:
     docker_env['DOCKER_BASE_IMAGE'] = docker_base_image
+  if extra_docker_args is not None:
+    docker_env['EXTRA_DOCKER_ARGS'] = extra_docker_args
   jobspec = jobset.JobSpec(
           cmdline=['tools/run_tests/dockerize/build_and_run_docker.sh'] + docker_args,
           environ=docker_env,
@@ -65,9 +68,20 @@
   return jobspec
 
 
-def create_jobspec(name, cmdline, environ=None, shell=False,
-                   flake_retries=0, timeout_retries=0, timeout_seconds=30*60):
+def create_jobspec(name, cmdline, environ={}, shell=False,
+                   flake_retries=0, timeout_retries=0, timeout_seconds=30*60,
+                   use_workspace=False,
+                   cpu_cost=1.0):
   """Creates jobspec."""
+  environ = environ.copy()
+  if use_workspace:
+    environ['WORKSPACE_NAME'] = 'workspace_%s' % name
+    environ['ARTIFACTS_OUT'] = os.path.join('..', 'artifacts', name)
+    cmdline = ['bash',
+               'tools/run_tests/artifacts/run_in_workspace.sh'] + cmdline
+  else:
+    environ['ARTIFACTS_OUT'] = os.path.join('artifacts', name)
+
   jobspec = jobset.JobSpec(
           cmdline=cmdline,
           environ=environ,
@@ -75,7 +89,8 @@
           timeout_seconds=timeout_seconds,
           flake_retries=flake_retries,
           timeout_retries=timeout_retries,
-          shell=shell)
+          shell=shell,
+          cpu_cost=cpu_cost)
   return jobspec
 
 
@@ -102,7 +117,22 @@
 
   def build_jobspec(self):
     environ = {}
-    if self.platform == 'linux':
+    if self.platform == 'linux_extra':
+      # Raspberry Pi build
+      environ['PYTHON'] = '/usr/local/bin/python{}'.format(self.py_version)
+      environ['PIP'] = '/usr/local/bin/pip{}'.format(self.py_version)
+      # https://github.com/resin-io-projects/armv7hf-debian-qemu/issues/9
+      # A QEMU bug causes submodule update to hang, so we copy directly
+      environ['RELATIVE_COPY_PATH'] = '.'
+      extra_args = ' --entrypoint=/usr/bin/qemu-arm-static '
+      return create_docker_jobspec(self.name,
+          'tools/dockerfile/grpc_artifact_linux_{}'.format(self.arch),
+          'tools/run_tests/artifacts/build_artifact_python.sh',
+          environ=environ,
+          timeout_seconds=60*60*5,
+          docker_base_image='quay.io/grpc/raspbian_{}'.format(self.arch),
+          extra_docker_args=extra_args)
+    elif self.platform == 'linux':
       if self.arch == 'x86':
         environ['SETARCH_CMD'] = 'linux32'
       # Inside the manylinux container, the python installations are located in
@@ -137,13 +167,14 @@
                              dir
                             ],
                             environ=environ,
-                            shell=True)
+                            use_workspace=True)
     else:
       environ['PYTHON'] = self.py_version
       environ['SKIP_PIP_INSTALL'] = 'TRUE'
       return create_jobspec(self.name,
                             ['tools/run_tests/artifacts/build_artifact_python.sh'],
-                            environ=environ)
+                            environ=environ,
+                            use_workspace=True)
 
   def __str__(self):
     return self.name
@@ -162,20 +193,11 @@
     return []
 
   def build_jobspec(self):
-    if self.platform == 'windows':
-      raise Exception("Not supported yet")
-    else:
-      if self.platform == 'linux':
-        environ = {}
-        if self.arch == 'x86':
-          environ['SETARCH_CMD'] = 'linux32'
-        return create_docker_jobspec(self.name,
-            'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
-            'tools/run_tests/artifacts/build_artifact_ruby.sh',
-            environ=environ)
-      else:
-        return create_jobspec(self.name,
-                              ['tools/run_tests/artifacts/build_artifact_ruby.sh'])
+    # Ruby build uses docker internally and docker cannot be nested.
+    # We are using a custom workspace instead.
+    return create_jobspec(self.name,
+                          ['tools/run_tests/artifacts/build_artifact_ruby.sh'],
+                          use_workspace=True)
 
 
 class CSharpExtArtifact:
@@ -196,7 +218,7 @@
       return create_jobspec(self.name,
                             ['tools\\run_tests\\artifacts\\build_artifact_csharp.bat',
                              cmake_arch_option],
-                            shell=True)
+                            use_workspace=True)
     else:
       environ = {'CONFIG': 'opt',
                  'EMBED_OPENSSL': 'true',
@@ -216,7 +238,8 @@
         environ['LDFLAGS'] += ' %s' % archflag
         return create_jobspec(self.name,
                               ['tools/run_tests/artifacts/build_artifact_csharp.sh'],
-                              environ=environ)
+                              environ=environ,
+                              use_workspace=True)
 
   def __str__(self):
     return self.name
@@ -242,10 +265,15 @@
 
   def build_jobspec(self):
     if self.platform == 'windows':
+      # Simultaneous builds of node on the same windows machine are flaky.
+      # Set x86 build as exclusive to make sure there is only one node build
+      # at a time. See https://github.com/grpc/grpc/issues/8293
+      cpu_cost = 1e6 if self.arch != 'x64' else 1.0
       return create_jobspec(self.name,
                             ['tools\\run_tests\\artifacts\\build_artifact_node.bat',
                              self.gyp_arch],
-                            shell=True)
+                            use_workspace=True,
+                            cpu_cost=cpu_cost)
     else:
       if self.platform == 'linux':
         return create_docker_jobspec(
@@ -255,7 +283,8 @@
       else:
         return create_jobspec(self.name,
                               ['tools/run_tests/artifacts/build_artifact_node.sh',
-                               self.gyp_arch])
+                               self.gyp_arch],
+                               use_workspace=True)
 
 class PHPArtifact:
   """Builds PHP PECL package"""
@@ -277,7 +306,8 @@
           'tools/run_tests/artifacts/build_artifact_php.sh')
     else:
       return create_jobspec(self.name,
-                            ['tools/run_tests/artifacts/build_artifact_php.sh'])
+                            ['tools/run_tests/artifacts/build_artifact_php.sh'],
+                            use_workspace=True)
 
 class ProtocArtifact:
   """Builds protoc and protoc-plugin artifacts"""
@@ -310,14 +340,16 @@
         environ['CXXFLAGS'] += ' -std=c++11 -stdlib=libc++ %s' % _MACOS_COMPAT_FLAG
         return create_jobspec(self.name,
             ['tools/run_tests/artifacts/build_artifact_protoc.sh'],
-            environ=environ)
+            environ=environ,
+            use_workspace=True)
     else:
       generator = 'Visual Studio 12 Win64' if self.arch == 'x64' else 'Visual Studio 12' 
       vcplatform = 'x64' if self.arch == 'x64' else 'Win32'
       return create_jobspec(self.name,
                             ['tools\\run_tests\\artifacts\\build_artifact_protoc.bat'],
                             environ={'generator': generator,
-                                     'Platform': vcplatform})
+                                     'Platform': vcplatform},
+                            use_workspace=True)
 
   def __str__(self):
     return self.name
@@ -334,6 +366,14 @@
            PythonArtifact('linux', 'x86', 'cp34-cp34m'),
            PythonArtifact('linux', 'x86', 'cp35-cp35m'),
            PythonArtifact('linux', 'x86', 'cp36-cp36m'),
+           PythonArtifact('linux_extra', 'armv7', '2.7'),
+           PythonArtifact('linux_extra', 'armv7', '3.4'),
+           PythonArtifact('linux_extra', 'armv7', '3.5'),
+           PythonArtifact('linux_extra', 'armv7', '3.6'),
+           PythonArtifact('linux_extra', 'armv6', '2.7'),
+           PythonArtifact('linux_extra', 'armv6', '3.4'),
+           PythonArtifact('linux_extra', 'armv6', '3.5'),
+           PythonArtifact('linux_extra', 'armv6', '3.6'),
            PythonArtifact('linux', 'x64', 'cp27-cp27m'),
            PythonArtifact('linux', 'x64', 'cp27-cp27mu'),
            PythonArtifact('linux', 'x64', 'cp34-cp34m'),
@@ -351,7 +391,6 @@
            PythonArtifact('windows', 'x64', 'Python34'),
            PythonArtifact('windows', 'x64', 'Python35'),
            PythonArtifact('windows', 'x64', 'Python36'),
-           RubyArtifact('linux', 'x86'),
            RubyArtifact('linux', 'x64'),
            RubyArtifact('macos', 'x64'),
            PHPArtifact('linux', 'x64'),
diff --git a/tools/run_tests/artifacts/build_artifact_csharp.bat b/tools/run_tests/artifacts/build_artifact_csharp.bat
index f84ebc5..ebb11bf 100644
--- a/tools/run_tests/artifacts/build_artifact_csharp.bat
+++ b/tools/run_tests/artifacts/build_artifact_csharp.bat
@@ -37,8 +37,8 @@
 cmake --build . --target grpc_csharp_ext --config Release
 cd ..\..\..
 
-mkdir artifacts
-copy /Y cmake\build\Win32\Release\grpc_csharp_ext.dll artifacts || copy /Y cmake\build\x64\Release\grpc_csharp_ext.dll artifacts || goto :error
+mkdir -p %ARTIFACTS_OUT%
+copy /Y cmake\build\Win32\Release\grpc_csharp_ext.dll %ARTIFACTS_OUT% || copy /Y cmake\build\x64\Release\grpc_csharp_ext.dll %ARTIFACTS_OUT% || goto :error
 
 goto :EOF
 
diff --git a/tools/run_tests/artifacts/build_artifact_csharp.sh b/tools/run_tests/artifacts/build_artifact_csharp.sh
index aed04b2..2bfa749 100755
--- a/tools/run_tests/artifacts/build_artifact_csharp.sh
+++ b/tools/run_tests/artifacts/build_artifact_csharp.sh
@@ -34,5 +34,5 @@
 
 make grpc_csharp_ext
 
-mkdir -p artifacts
-cp libs/opt/libgrpc_csharp_ext.so artifacts || cp libs/opt/libgrpc_csharp_ext.dylib artifacts
+mkdir -p "${ARTIFACTS_OUT}"
+cp libs/opt/libgrpc_csharp_ext.so "${ARTIFACTS_OUT}" || cp libs/opt/libgrpc_csharp_ext.dylib "${ARTIFACTS_OUT}"
diff --git a/tools/run_tests/artifacts/build_artifact_node.bat b/tools/run_tests/artifacts/build_artifact_node.bat
index bfd4461..da4d479 100644
--- a/tools/run_tests/artifacts/build_artifact_node.bat
+++ b/tools/run_tests/artifacts/build_artifact_node.bat
@@ -37,7 +37,7 @@
 
 call npm update || goto :error
 
-mkdir artifacts
+mkdir -p %ARTIFACTS_OUT%
 
 for %%v in (%node_versions%) do (
   call .\node_modules\.bin\node-pre-gyp.cmd configure build --target=%%v --target_arch=%1
@@ -47,13 +47,13 @@
   rmdir "%HOMEDRIVE%%HOMEPATH%\.node-gyp\iojs-%%v\include\node\openssl" /S /Q
   call .\node_modules\.bin\node-pre-gyp.cmd build package testpackage --target=%%v --target_arch=%1 || goto :error
 
-  xcopy /Y /I /S build\stage\* artifacts\ || goto :error
+  xcopy /Y /I /S build\stage\* %ARTIFACTS_OUT%\ || goto :error
 )
 
 for %%v in (%electron_versions%) do (
   cmd /V /C "set "HOME=%HOMEDRIVE%%HOMEPATH%\electron-gyp" && call .\node_modules\.bin\node-pre-gyp.cmd configure rebuild package testpackage --runtime=electron --target=%%v --target_arch=%1 --disturl=https://atom.io/download/electron" || goto :error
 
-  xcopy /Y /I /S build\stage\* artifacts\ || goto :error
+  xcopy /Y /I /S build\stage\* %ARTIFACTS_OUT%\ || goto :error
 )
 if %errorlevel% neq 0 exit /b %errorlevel%
 
diff --git a/tools/run_tests/artifacts/build_artifact_node.sh b/tools/run_tests/artifacts/build_artifact_node.sh
index 7a74755..3947bde 100755
--- a/tools/run_tests/artifacts/build_artifact_node.sh
+++ b/tools/run_tests/artifacts/build_artifact_node.sh
@@ -38,7 +38,7 @@
 
 rm -rf build || true
 
-mkdir -p artifacts
+mkdir -p "${ARTIFACTS_OUT}"
 
 npm update
 
@@ -49,11 +49,11 @@
 for version in ${node_versions[@]}
 do
   ./node_modules/.bin/node-pre-gyp configure rebuild package testpackage --target=$version --target_arch=$NODE_TARGET_ARCH --grpc_alpine=true
-  cp -r build/stage/* artifacts/
+  cp -r build/stage/* "${ARTIFACTS_OUT}"/
 done
 
 for version in ${electron_versions[@]}
 do
   HOME=~/.electron-gyp ./node_modules/.bin/node-pre-gyp configure rebuild package testpackage --runtime=electron --target=$version --target_arch=$NODE_TARGET_ARCH --disturl=https://atom.io/download/electron
-  cp -r build/stage/* artifacts/
+  cp -r build/stage/* "${ARTIFACTS_OUT}"/
 done
diff --git a/tools/run_tests/artifacts/build_artifact_php.sh b/tools/run_tests/artifacts/build_artifact_php.sh
index c8d5586..d7f8c8f 100755
--- a/tools/run_tests/artifacts/build_artifact_php.sh
+++ b/tools/run_tests/artifacts/build_artifact_php.sh
@@ -33,8 +33,8 @@
 
 cd $(dirname $0)/../../..
 
-mkdir -p artifacts
+mkdir -p "${ARTIFACTS_OUT}"
 
 pear package
 
-cp -r grpc-*.tgz artifacts/
+cp -r grpc-*.tgz "${ARTIFACTS_OUT}"/
diff --git a/tools/run_tests/artifacts/build_artifact_protoc.bat b/tools/run_tests/artifacts/build_artifact_protoc.bat
index b2bf86d..def64bd 100644
--- a/tools/run_tests/artifacts/build_artifact_protoc.bat
+++ b/tools/run_tests/artifacts/build_artifact_protoc.bat
@@ -27,7 +27,7 @@
 @rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 @rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-mkdir artifacts
+mkdir -p %ARTIFACTS_OUT%
 
 setlocal
 cd third_party/protobuf/cmake
@@ -39,8 +39,8 @@
 
 call vsprojects/build_plugins.bat || goto :error
 
-xcopy /Y third_party\protobuf\cmake\build\solution\Release\protoc.exe artifacts\ || goto :error
-xcopy /Y vsprojects\Release\*_plugin.exe artifacts\ || xcopy /Y vsprojects\x64\Release\*_plugin.exe artifacts\ || goto :error
+xcopy /Y third_party\protobuf\cmake\build\solution\Release\protoc.exe %ARTIFACTS_OUT%\ || goto :error
+xcopy /Y vsprojects\Release\*_plugin.exe %ARTIFACTS_OUT%\ || xcopy /Y vsprojects\x64\Release\*_plugin.exe %ARTIFACTS_OUT%\ || goto :error
 
 goto :EOF
 
diff --git a/tools/run_tests/artifacts/build_artifact_protoc.sh b/tools/run_tests/artifacts/build_artifact_protoc.sh
index 26c2280..df78203 100755
--- a/tools/run_tests/artifacts/build_artifact_protoc.sh
+++ b/tools/run_tests/artifacts/build_artifact_protoc.sh
@@ -37,5 +37,5 @@
 
 make plugins
 
-mkdir -p artifacts
-cp bins/opt/protobuf/protoc bins/opt/*_plugin artifacts/
+mkdir -p "${ARTIFACTS_OUT}"
+cp bins/opt/protobuf/protoc bins/opt/*_plugin "${ARTIFACTS_OUT}"/
diff --git a/tools/run_tests/artifacts/build_artifact_python.bat b/tools/run_tests/artifacts/build_artifact_python.bat
index 246713a..860b9e8 100644
--- a/tools/run_tests/artifacts/build_artifact_python.bat
+++ b/tools/run_tests/artifacts/build_artifact_python.bat
@@ -38,8 +38,9 @@
 
 @rem Multiple builds are running simultaneously, so to avoid distutils
 @rem file collisions, we build everything in a tmp directory
-if not exist "artifacts" mkdir "artifacts"
-set ARTIFACT_DIR=%cd%\artifacts
+@rem TODO(jtattermusch): it doesn't look like builds are actually running in parallel in the same dir
+mkdir -p %ARTIFACTS_OUT%
+set ARTIFACT_DIR=%cd%\%ARTIFACTS_OUT%
 set BUILD_DIR=C:\Windows\Temp\pygrpc-%3\
 mkdir %BUILD_DIR%
 xcopy /s/e/q %cd%\* %BUILD_DIR%
diff --git a/tools/run_tests/artifacts/build_artifact_python.sh b/tools/run_tests/artifacts/build_artifact_python.sh
index 5a55060..a1f0a58 100755
--- a/tools/run_tests/artifacts/build_artifact_python.sh
+++ b/tools/run_tests/artifacts/build_artifact_python.sh
@@ -41,8 +41,9 @@
 # Because multiple builds run in parallel, some distutils file
 # operations may collide.  To avoid this, each build is run in
 # a temp directory
-mkdir -p artifacts
-ARTIFACT_DIR="$PWD/artifacts"
+# TODO(jtattermusch): it doesn't look like builds are actually running in parallel in the same dir
+mkdir -p "${ARTIFACTS_OUT}"
+ARTIFACT_DIR="$PWD/${ARTIFACTS_OUT}"
 BUILD_DIR=`mktemp -d "${TMPDIR:-/tmp}/pygrpc.XXXXXX"`
 trap "rm -rf $BUILD_DIR" EXIT
 cp -r * "$BUILD_DIR"
diff --git a/tools/run_tests/artifacts/build_artifact_ruby.sh b/tools/run_tests/artifacts/build_artifact_ruby.sh
index ca461ba..c92d7a8 100755
--- a/tools/run_tests/artifacts/build_artifact_ruby.sh
+++ b/tools/run_tests/artifacts/build_artifact_ruby.sh
@@ -63,6 +63,6 @@
   rm `ls pkg/*.gem | grep -v darwin`
 fi
 
-mkdir -p artifacts
+mkdir -p "${ARTIFACTS_OUT}"
 
-cp pkg/*.gem artifacts
+cp pkg/*.gem "${ARTIFACTS_OUT}"/
diff --git a/tools/run_tests/artifacts/build_package_node.sh b/tools/run_tests/artifacts/build_package_node.sh
index 8b5e8c0..d06f141 100755
--- a/tools/run_tests/artifacts/build_package_node.sh
+++ b/tools/run_tests/artifacts/build_package_node.sh
@@ -40,7 +40,7 @@
 artifacts=$base/artifacts
 
 mkdir -p $artifacts
-cp -r $EXTERNAL_GIT_ROOT/architecture={x86,x64},language=node,platform={windows,linux,macos}/artifacts/* $artifacts/ || true
+cp -r $EXTERNAL_GIT_ROOT/platform={windows,linux,macos}/artifacts/node_ext_*/* $artifacts/ || true
 
 npm update
 npm pack
@@ -86,7 +86,7 @@
         ;;
     esac
     rm -r bin/*
-    input_dir="$EXTERNAL_GIT_ROOT/architecture=$arch,language=protoc,platform=$plat/artifacts"
+    input_dir="$EXTERNAL_GIT_ROOT/platform=${plat}/artifacts/protoc_${plat}_${arch}"
     cp $input_dir/protoc* bin/
     cp $input_dir/grpc_node_plugin* bin/
     mkdir -p bin/google/protobuf
diff --git a/tools/run_tests/artifacts/build_package_php.sh b/tools/run_tests/artifacts/build_package_php.sh
index 42a8d9f..16da58d 100755
--- a/tools/run_tests/artifacts/build_package_php.sh
+++ b/tools/run_tests/artifacts/build_package_php.sh
@@ -33,4 +33,4 @@
 cd $(dirname $0)/../../..
 
 mkdir -p artifacts/
-cp -r $EXTERNAL_GIT_ROOT/architecture={x86,x64},language=php,platform={windows,linux,macos}/artifacts/* artifacts/ || true
+cp -r $EXTERNAL_GIT_ROOT/platform={windows,linux,macos}/artifacts/php_*/* artifacts/ || true
diff --git a/tools/run_tests/artifacts/build_package_python.sh b/tools/run_tests/artifacts/build_package_python.sh
index 4a1c15c..9148bb0 100755
--- a/tools/run_tests/artifacts/build_package_python.sh
+++ b/tools/run_tests/artifacts/build_package_python.sh
@@ -36,7 +36,7 @@
 
 # All the python packages have been built in the artifact phase already
 # and we only collect them here to deliver them to the distribtest phase.
-cp -r $EXTERNAL_GIT_ROOT/architecture={x86,x64},language=python,platform={windows,linux,macos}/artifacts/* artifacts/ || true
+cp -r $EXTERNAL_GIT_ROOT/platform={windows,linux,macos}/artifacts/python_*/* artifacts/ || true
 
 # TODO: all the artifact builder configurations generate a grpcio-VERSION.tar.gz
 # source distribution package, and only one of them will end up
diff --git a/tools/run_tests/artifacts/build_package_ruby.sh b/tools/run_tests/artifacts/build_package_ruby.sh
index b4d20d8..8388b84 100755
--- a/tools/run_tests/artifacts/build_package_ruby.sh
+++ b/tools/run_tests/artifacts/build_package_ruby.sh
@@ -38,7 +38,7 @@
 
 # All the ruby packages have been built in the artifact phase already
 # and we only collect them here to deliver them to the distribtest phase.
-cp -r $EXTERNAL_GIT_ROOT/architecture={x86,x64},language=ruby,platform={windows,linux,macos}/artifacts/* artifacts/ || true
+cp -r $EXTERNAL_GIT_ROOT/platform={windows,linux,macos}/artifacts/ruby_native_gem_*/* artifacts/ || true
 
 well_known_protos=( any api compiler/plugin descriptor duration empty field_mask source_context struct timestamp type wrappers )
 
@@ -56,7 +56,7 @@
       ;;
   esac
   for plat in {windows,linux,macos}; do
-    input_dir="$EXTERNAL_GIT_ROOT/architecture=$arch,language=protoc,platform=$plat/artifacts"
+    input_dir="$EXTERNAL_GIT_ROOT/platform=${plat}/artifacts/protoc_${plat}_${arch}"
     output_dir="$base/src/ruby/tools/bin/${ruby_arch}-${plat}"
     mkdir -p $output_dir/google/protobuf
     mkdir -p $output_dir/google/protobuf/compiler  # needed for plugin.proto
diff --git a/tools/run_tests/artifacts/distribtest_targets.py b/tools/run_tests/artifacts/distribtest_targets.py
index 097fd2d..3cb7d97 100644
--- a/tools/run_tests/artifacts/distribtest_targets.py
+++ b/tools/run_tests/artifacts/distribtest_targets.py
@@ -63,8 +63,14 @@
 
 
 def create_jobspec(name, cmdline, environ=None, shell=False,
-                   flake_retries=0, timeout_retries=0):
+                   flake_retries=0, timeout_retries=0,
+                   use_workspace=False):
   """Creates jobspec."""
+  environ = environ.copy()
+  if use_workspace:
+    environ['WORKSPACE_NAME'] = 'workspace_%s' % name
+    cmdline = ['bash',
+               'tools/run_tests/artifacts/run_in_workspace.sh'] + cmdline
   jobspec = jobset.JobSpec(
           cmdline=cmdline,
           environ=environ,
@@ -80,7 +86,7 @@
   """Tests C# NuGet package"""
 
   def __init__(self, platform, arch, docker_suffix=None, use_dotnet_cli=False):
-    self.name = 'csharp_nuget_%s_%s' % (platform, arch)
+    self.name = 'csharp_%s_%s' % (platform, arch)
     self.platform = platform
     self.arch = arch
     self.docker_suffix = docker_suffix
@@ -110,16 +116,18 @@
     elif self.platform == 'macos':
       return create_jobspec(self.name,
           ['test/distrib/csharp/run_distrib_test%s.sh' % self.script_suffix],
-          environ={'EXTERNAL_GIT_ROOT': '../../..'})
+          environ={'EXTERNAL_GIT_ROOT': '../../../..'},
+          use_workspace=True)
     elif self.platform == 'windows':
       if self.arch == 'x64':
         environ={'MSBUILD_EXTRA_ARGS': '/p:Platform=x64',
                  'DISTRIBTEST_OUTPATH': 'DistribTest\\bin\\x64\\Debug'}
       else:
-        environ={'DISTRIBTEST_OUTPATH': 'DistribTest\\bin\\\Debug'}
+        environ={'DISTRIBTEST_OUTPATH': 'DistribTest\\bin\\Debug'}
       return create_jobspec(self.name,
           ['test\\distrib\\csharp\\run_distrib_test%s.bat' % self.script_suffix],
-          environ=environ)
+          environ=environ,
+          use_workspace=True)
     else:
       raise Exception("Not supported yet.")
 
@@ -161,7 +169,8 @@
       return create_jobspec(self.name,
                             ['test/distrib/node/run_distrib_test.sh',
                              str(self.node_version)],
-                            environ={'EXTERNAL_GIT_ROOT': '../../..'})
+                            environ={'EXTERNAL_GIT_ROOT': '../../../..'},
+                            use_workspace=True)
     else:
       raise Exception("Not supported yet.")
 
@@ -249,7 +258,8 @@
     elif self.platform == 'macos':
       return create_jobspec(self.name,
           ['test/distrib/php/run_distrib_test.sh'],
-          environ={'EXTERNAL_GIT_ROOT': '../../..'})
+          environ={'EXTERNAL_GIT_ROOT': '../../../..'},
+          use_workspace=True)
     else:
       raise Exception("Not supported yet.")
 
@@ -339,5 +349,5 @@
             NodeDistribTest('linux', 'x64', os, version)
             for os in ('wheezy', 'jessie', 'ubuntu1204', 'ubuntu1404',
                        'ubuntu1504', 'ubuntu1510', 'ubuntu1604')
-            for version in ('0.12', '3', '4', '5')
+            for version in ('4', '5')
           ]
diff --git a/tools/grpcz/BUILD b/tools/run_tests/artifacts/run_in_workspace.sh
old mode 100644
new mode 100755
similarity index 66%
copy from tools/grpcz/BUILD
copy to tools/run_tests/artifacts/run_in_workspace.sh
index cc887a5..ed3bfda
--- a/tools/grpcz/BUILD
+++ b/tools/run_tests/artifacts/run_in_workspace.sh
@@ -1,4 +1,5 @@
-# Copyright 2017, Google Inc.
+#!/bin/bash
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -26,38 +27,21 @@
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Create a workspace in a subdirectory to allow running multiple builds in isolation.
+# WORKSPACE_NAME env variable needs to contain name of the workspace to create.
+# All cmdline args will be executed as a command.
+set -ex
 
-licenses(["notice"])  # 3-clause BSD
+cd $(dirname $0)/../../..
+export repo_root=$(pwd)
 
-package(default_visibility = ["//visibility:public"])
+rm -rf "${WORKSPACE_NAME}"
+git clone . "${WORKSPACE_NAME}"
+# clone gRPC submodules, use data from locally cloned submodules where possible
+git submodule foreach 'cd "${repo_root}/${WORKSPACE_NAME}" \
+    && git submodule update --init --reference ${repo_root}/${name} ${name}'
 
-load("//:bazel/grpc_build_system.bzl", "grpc_proto_library")
-
-grpc_proto_library(
-    name = "monitoring_proto",
-    srcs = [
-        "monitoring.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-    deps = [
-        ":census_proto",
-    ],
-)
-
-grpc_proto_library(
-    name = "census_proto",
-    srcs = [
-        "census.proto",
-    ],
-    well_known_protos = "@com_google_protobuf//:well_known_protos",
-)
-
-cc_binary(
-    name = "grpcz_client",
-    srcs = ["grpcz_client.cc"],
-    deps = [
-        "monitoring_proto",
-        "//external:gflags",
-        "@mongoose_repo//:mongoose_lib",
-    ],
-)
+echo "Running in workspace ${WORKSPACE_NAME}"
+cd ${WORKSPACE_NAME}
+$@
diff --git a/tools/run_tests/dockerize/build_and_run_docker.sh b/tools/run_tests/dockerize/build_and_run_docker.sh
index 8c25c86..6189e9a 100755
--- a/tools/run_tests/dockerize/build_and_run_docker.sh
+++ b/tools/run_tests/dockerize/build_and_run_docker.sh
@@ -74,8 +74,9 @@
   -v "$git_root:/var/local/jenkins/grpc:ro" \
   -w /var/local/git/grpc \
   --name=$CONTAINER_NAME \
+  $EXTRA_DOCKER_ARGS \
   $DOCKER_IMAGE_NAME \
-  bash -l "/var/local/jenkins/grpc/$DOCKER_RUN_SCRIPT" || FAILED="true"
+  /bin/bash -l "/var/local/jenkins/grpc/$DOCKER_RUN_SCRIPT" || FAILED="true"
 
 # Copy output artifacts
 if [ "$OUTPUT_DIR" != "" ]
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index a488c15..a5d7fda 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -5064,6 +5064,24 @@
     "headers": [], 
     "is_filegroup": false, 
     "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "src": [
+      "test/core/end2end/fixtures/h2_full+workarounds.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "end2end_tests", 
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c", 
     "name": "h2_http_proxy_test", 
     "src": [
       "test/core/end2end/fixtures/h2_http_proxy.c"
@@ -5370,6 +5388,24 @@
     "headers": [], 
     "is_filegroup": false, 
     "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "src": [
+      "test/core/end2end/fixtures/h2_full+workarounds.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "end2end_nosec_tests", 
+      "gpr", 
+      "gpr_test_util", 
+      "grpc_test_util_unsecure", 
+      "grpc_unsecure"
+    ], 
+    "headers": [], 
+    "is_filegroup": false, 
+    "language": "c", 
     "name": "h2_http_proxy_nosec_test", 
     "src": [
       "test/core/end2end/fixtures/h2_http_proxy.c"
@@ -5764,10 +5800,12 @@
       "grpc_resolver_dns_native", 
       "grpc_resolver_sockaddr", 
       "grpc_secure", 
+      "grpc_server_backward_compatibility", 
       "grpc_transport_chttp2_client_insecure", 
       "grpc_transport_chttp2_client_secure", 
       "grpc_transport_chttp2_server_insecure", 
-      "grpc_transport_chttp2_server_secure"
+      "grpc_transport_chttp2_server_secure", 
+      "grpc_workaround_cronet_compression_filter"
     ], 
     "headers": [], 
     "is_filegroup": false, 
@@ -5868,8 +5906,10 @@
       "grpc_resolver_dns_ares", 
       "grpc_resolver_dns_native", 
       "grpc_resolver_sockaddr", 
+      "grpc_server_backward_compatibility", 
       "grpc_transport_chttp2_client_insecure", 
-      "grpc_transport_chttp2_server_insecure"
+      "grpc_transport_chttp2_server_insecure", 
+      "grpc_workaround_cronet_compression_filter"
     ], 
     "headers": [], 
     "is_filegroup": false, 
@@ -7402,6 +7442,7 @@
       "test/core/end2end/tests/simple_request.c", 
       "test/core/end2end/tests/streaming_error_response.c", 
       "test/core/end2end/tests/trailing_metadata.c", 
+      "test/core/end2end/tests/workaround_cronet_compression.c", 
       "test/core/end2end/tests/write_buffering.c", 
       "test/core/end2end/tests/write_buffering_at_end.c"
     ], 
@@ -7477,6 +7518,7 @@
       "test/core/end2end/tests/simple_request.c", 
       "test/core/end2end/tests/streaming_error_response.c", 
       "test/core/end2end/tests/trailing_metadata.c", 
+      "test/core/end2end/tests/workaround_cronet_compression.c", 
       "test/core/end2end/tests/write_buffering.c", 
       "test/core/end2end/tests/write_buffering_at_end.c"
     ], 
@@ -7746,6 +7788,7 @@
       "include/grpc/slice.h", 
       "include/grpc/slice_buffer.h", 
       "include/grpc/status.h", 
+      "include/grpc/support/workaround_list.h", 
       "src/core/lib/channel/channel_args.h", 
       "src/core/lib/channel/channel_stack.h", 
       "src/core/lib/channel/channel_stack_builder.h", 
@@ -7873,6 +7916,7 @@
       "include/grpc/slice.h", 
       "include/grpc/slice_buffer.h", 
       "include/grpc/status.h", 
+      "include/grpc/support/workaround_list.h", 
       "src/core/lib/channel/channel_args.c", 
       "src/core/lib/channel/channel_args.h", 
       "src/core/lib/channel/channel_stack.c", 
@@ -7925,6 +7969,7 @@
       "src/core/lib/iomgr/ev_poll_posix.h", 
       "src/core/lib/iomgr/ev_posix.c", 
       "src/core/lib/iomgr/ev_posix.h", 
+      "src/core/lib/iomgr/ev_windows.c", 
       "src/core/lib/iomgr/exec_ctx.c", 
       "src/core/lib/iomgr/exec_ctx.h", 
       "src/core/lib/iomgr/executor.c", 
@@ -8557,6 +8602,24 @@
   }, 
   {
     "deps": [
+      "gpr", 
+      "grpc_base"
+    ], 
+    "headers": [
+      "src/core/ext/filters/workarounds/workaround_utils.h"
+    ], 
+    "is_filegroup": true, 
+    "language": "c", 
+    "name": "grpc_server_backward_compatibility", 
+    "src": [
+      "src/core/ext/filters/workarounds/workaround_utils.c", 
+      "src/core/ext/filters/workarounds/workaround_utils.h"
+    ], 
+    "third_party": false, 
+    "type": "filegroup"
+  }, 
+  {
+    "deps": [
       "gpr_test_util", 
       "grpc"
     ], 
@@ -8867,6 +8930,25 @@
     "type": "filegroup"
   }, 
   {
+    "deps": [
+      "gpr", 
+      "grpc_base", 
+      "grpc_server_backward_compatibility"
+    ], 
+    "headers": [
+      "src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h"
+    ], 
+    "is_filegroup": true, 
+    "language": "c", 
+    "name": "grpc_workaround_cronet_compression_filter", 
+    "src": [
+      "src/core/ext/filters/workarounds/workaround_cronet_compression_filter.c", 
+      "src/core/ext/filters/workarounds/workaround_cronet_compression_filter.h"
+    ], 
+    "third_party": false, 
+    "type": "filegroup"
+  }, 
+  {
     "deps": [], 
     "headers": [
       "third_party/nanopb/pb.h", 
diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index 48f24ab..d1e3a99 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -2805,7 +2805,7 @@
   }, 
   {
     "args": [
-      "--benchmark_min_time=0"
+      "--benchmark_min_time=4"
     ], 
     "ci_platforms": [
       "linux", 
@@ -7077,6 +7077,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_census_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -8277,6 +8300,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_compress_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -9449,6 +9495,28 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fakesec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -10505,6 +10573,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -11728,6 +11819,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -12743,6 +12857,25 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+pipe_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -13912,6 +14045,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -13963,6 +14119,1252 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "bad_hostname"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "bad_ping"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "binary_metadata"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "call_creds"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_accept"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_client_done"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_invoke"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
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+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_before_invoke"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
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+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
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+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_in_a_vacuum"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
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+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
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+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
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+      "cancel_with_status"
+    ], 
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+      "linux", 
+      "mac", 
+      "posix"
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+    "platforms": [
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+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
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+      "compressed_payload"
+    ], 
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+      "linux", 
+      "mac", 
+      "posix"
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+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
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+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
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+      "connectivity"
+    ], 
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+      "linux", 
+      "mac", 
+      "posix"
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+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "default_host"
+    ], 
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+      "linux", 
+      "mac", 
+      "posix"
+    ], 
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+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "disappearing_server"
+    ], 
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+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
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+    "name": "h2_full+workarounds_test", 
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+      "linux", 
+      "mac", 
+      "posix"
+    ]
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+  {
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+      "empty_batch"
+    ], 
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+      "mac", 
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+      "linux", 
+      "mac", 
+      "posix"
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+  {
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+      "posix"
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+      "mac", 
+      "posix"
+    ]
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+      "high_initial_seqno"
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+      "mac", 
+      "posix"
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+      "hpack_size"
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+      "mac", 
+      "posix"
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+      "mac", 
+      "posix"
+    ]
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+      "mac", 
+      "posix"
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+      "posix"
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+      "mac", 
+      "posix"
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+      "large_metadata"
+    ], 
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+      "mac", 
+      "posix"
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+      "mac", 
+      "posix"
+    ]
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+  {
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+      "load_reporting_hook"
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+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
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+      "streaming_error_response"
+    ], 
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+      "windows", 
+      "linux", 
+      "mac", 
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+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "trailing_metadata"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "write_buffering"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "write_buffering_at_end"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "authority_not_supported"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
@@ -15182,6 +16584,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_http_proxy_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -16407,6 +17833,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_load_reporting_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -17677,6 +19126,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_oauth2_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -18709,6 +20182,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_proxy_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -19813,6 +21310,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -20845,6 +22366,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair+trace_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -22011,6 +23556,32 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [
+      "msan"
+    ], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_1byte_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -23240,6 +24811,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -24463,6 +26057,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_cert_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -25493,6 +27110,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_proxy_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -26691,6 +28332,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_uds_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -27891,6 +29555,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_census_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -29068,6 +30755,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_compress_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -30103,6 +31813,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -31303,6 +33036,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -32299,6 +34055,25 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+pipe_nosec_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -33445,6 +35220,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -33496,6 +35294,1229 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "bad_hostname"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "bad_ping"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "binary_metadata"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_accept"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
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+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "simple_metadata"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "simple_request"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "trailing_metadata"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "write_buffering"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "write_buffering_at_end"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+workarounds_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "authority_not_supported"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
@@ -34691,6 +37712,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_http_proxy_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -35893,6 +38938,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_load_reporting_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -36899,6 +39967,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_proxy_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -37979,6 +41071,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -38987,6 +42103,30 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -40127,6 +43267,32 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [
+      "msan"
+    ], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_1byte_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -41306,6 +44472,29 @@
   }, 
   {
     "args": [
+      "workaround_cronet_compression"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_uds_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
       "write_buffering"
     ], 
     "ci_platforms": [
@@ -41353,6 +44542,56 @@
   {
     "args": [
       "--scenarios_json", 
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_1channel_100rpcs_1MB\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 1048576, \"req_size\": 1048576}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+    ], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": "capacity", 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "tsan", 
+      "asan"
+    ], 
+    "excluded_poll_engines": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "json_run_localhost", 
+    "platforms": [
+      "linux"
+    ], 
+    "shortname": "json_run_localhost:cpp_protobuf_async_unary_1channel_100rpcs_1MB", 
+    "timeout_seconds": 360
+  }, 
+  {
+    "args": [
+      "--scenarios_json", 
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_1channel_1MB\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 1048576, \"req_size\": 1048576}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+    ], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": "capacity", 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "tsan", 
+      "asan"
+    ], 
+    "excluded_poll_engines": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "json_run_localhost", 
+    "platforms": [
+      "linux"
+    ], 
+    "shortname": "json_run_localhost:cpp_protobuf_async_streaming_from_client_1channel_1MB", 
+    "timeout_seconds": 360
+  }, 
+  {
+    "args": [
+      "--scenarios_json", 
       "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_ping_pong_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
@@ -42911,6 +46150,82 @@
   {
     "args": [
       "--scenarios_json", 
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_unary_1channel_100rpcs_1MB\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 1048576, \"req_size\": 1048576}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+    ], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": "capacity", 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "asan-noleaks", 
+      "asan-trace-cmp", 
+      "basicprof", 
+      "c++-compat", 
+      "counters", 
+      "dbg", 
+      "gcov", 
+      "helgrind", 
+      "lto", 
+      "memcheck", 
+      "msan", 
+      "mutrace", 
+      "opt", 
+      "stapprof", 
+      "ubsan"
+    ], 
+    "excluded_poll_engines": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "json_run_localhost", 
+    "platforms": [
+      "linux"
+    ], 
+    "shortname": "json_run_localhost:cpp_protobuf_async_unary_1channel_100rpcs_1MB_low_thread_count", 
+    "timeout_seconds": 360
+  }, 
+  {
+    "args": [
+      "--scenarios_json", 
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_streaming_from_client_1channel_1MB\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 1048576, \"req_size\": 1048576}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING_FROM_CLIENT\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+    ], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": "capacity", 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "asan-noleaks", 
+      "asan-trace-cmp", 
+      "basicprof", 
+      "c++-compat", 
+      "counters", 
+      "dbg", 
+      "gcov", 
+      "helgrind", 
+      "lto", 
+      "memcheck", 
+      "msan", 
+      "mutrace", 
+      "opt", 
+      "stapprof", 
+      "ubsan"
+    ], 
+    "excluded_poll_engines": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "json_run_localhost", 
+    "platforms": [
+      "linux"
+    ], 
+    "shortname": "json_run_localhost:cpp_protobuf_async_streaming_from_client_1channel_1MB_low_thread_count", 
+    "timeout_seconds": 360
+  }, 
+  {
+    "args": [
+      "--scenarios_json", 
       "{\"scenarios\": [{\"name\": \"cpp_generic_async_streaming_ping_pong_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
     ], 
     "boringssl": true, 
diff --git a/tools/run_tests/helper_scripts/build_python.sh b/tools/run_tests/helper_scripts/build_python.sh
index 28397be..6ad285c 100755
--- a/tools/run_tests/helper_scripts/build_python.sh
+++ b/tools/run_tests/helper_scripts/build_python.sh
@@ -187,7 +187,8 @@
 pip_install_dir $ROOT/src/python/grpcio_reflection
 
 # Build/install tests
-$VENV_PYTHON -m pip install coverage oauth2client
+$VENV_PYTHON -m pip install coverage==4.4 oauth2client==4.1.0 \
+                            google-auth==1.0.0 requests==2.14.2
 $VENV_PYTHON $ROOT/src/python/grpcio_tests/setup.py preprocess
 $VENV_PYTHON $ROOT/src/python/grpcio_tests/setup.py build_package_protos
 pip_install_dir $ROOT/src/python/grpcio_tests
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index 8ed675e..c2ffd67 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -112,6 +112,7 @@
                         categories=DEFAULT_CATEGORIES,
                         channels=None,
                         outstanding=None,
+                        num_clients=None,
                         resource_quota_size=None,
                         messages_per_stream=None,
                         excluded_poll_engines=[]):
@@ -158,7 +159,7 @@
     wide = channels if channels is not None else WIDE
     deep = int(math.ceil(1.0 * outstanding_calls / wide))
 
-    scenario['num_clients'] = 0  # use as many client as available.
+    scenario['num_clients'] = num_clients if num_clients is not None else 0  # use as many clients as available.
     scenario['client_config']['outstanding_rpcs_per_channel'] = deep
     scenario['client_config']['client_channels'] = wide
     scenario['client_config']['async_client_threads'] = 0
@@ -196,6 +197,24 @@
 
   def scenarios(self):
     # TODO(ctiller): add 70% load latency test
+    yield _ping_pong_scenario(
+      'cpp_protobuf_async_unary_1channel_100rpcs_1MB', rpc_type='UNARY',
+      client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
+      req_size=1024*1024, resp_size=1024*1024,
+      unconstrained_client='async', outstanding=100, channels=1,
+      num_clients=1,
+      secure=False,
+      categories=[SMOKETEST] + [SCALABLE])
+
+    yield _ping_pong_scenario(
+      'cpp_protobuf_async_streaming_from_client_1channel_1MB', rpc_type='STREAMING_FROM_CLIENT',
+      client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
+      req_size=1024*1024, resp_size=1024*1024,
+      unconstrained_client='async', outstanding=1, channels=1,
+      num_clients=1,
+      secure=False,
+      categories=[SMOKETEST] + [SCALABLE])
+
     for secure in [True, False]:
       secstr = 'secure' if secure else 'insecure'
       smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]
diff --git a/tools/run_tests/python_utils/jobset.py b/tools/run_tests/python_utils/jobset.py
index 4e97128..3754035 100755
--- a/tools/run_tests/python_utils/jobset.py
+++ b/tools/run_tests/python_utils/jobset.py
@@ -225,6 +225,22 @@
     self.cpu_estimated = 1
     self.cpu_measured = 0
 
+
+def eintr_be_gone(fn):
+  """Run fn until it doesn't stop because of EINTR"""
+  while True:
+    try:
+      return fn()
+    except IOError, e:
+      if e.errno != errno.EINTR:
+        raise
+
+
+def read_from_start(f):
+  f.seek(0)
+  return f.read()
+
+
 class Job(object):
   """Manages one job."""
 
@@ -255,7 +271,7 @@
     self._start = time.time()
     cmdline = self._spec.cmdline
     if measure_cpu_costs:
-      cmdline = ['time', '--portability'] + cmdline
+      cmdline = ['time', '-p'] + cmdline
     try_start = lambda: subprocess.Popen(args=cmdline,
                                          stderr=subprocess.STDOUT,
                                          stdout=self._tempfile,
@@ -278,8 +294,7 @@
   def state(self):
     """Poll current state of the job. Prints messages at completion."""
     def stdout(self=self):
-      self._tempfile.seek(0)
-      stdout = self._tempfile.read()
+      stdout = read_from_start(self._tempfile)
       self.result.message = stdout[-_MAX_RESULT_SIZE:]
       return stdout
     if self._state == _RUNNING and self._process.poll() is not None:
@@ -307,7 +322,7 @@
         self._state = _SUCCESS
         measurement = ''
         if measure_cpu_costs:
-          m = re.search(r'real ([0-9.]+)\nuser ([0-9.]+)\nsys ([0-9.]+)', stdout())
+          m = re.search(r'real\s+([0-9.]+)\nuser\s+([0-9.]+)\nsys\s+([0-9.]+)', stdout())
           real = float(m.group(1))
           user = float(m.group(2))
           sys = float(m.group(3))
@@ -415,7 +430,7 @@
     while self._running:
       dead = set()
       for job in self._running:
-        st = job.state()
+        st = eintr_be_gone(lambda: job.state())
         if st == _RUNNING: continue
         if st == _FAILURE or st == _KILLED:
           self._failures += 1
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index 867d9e6..ae2da26 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -581,7 +581,7 @@
   env = {}
 
   # TODO(jtattermusch): this file path only works inside docker
-  key_filepath = '/root/service_account/stubbyCloudTestingTest-ee3fce360ac5.json'
+  key_filepath = '/root/service_account/GrpcTesting-726eb1347f15.json'
   oauth_scope_arg = '--oauth_scope=https://www.googleapis.com/auth/xapi.zoo'
   key_file_arg = '--service_account_key_file=%s' % key_filepath
   default_account_arg = '--default_service_account=830293263384-compute@developer.gserviceaccount.com'
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 83a8394..568774c 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -75,8 +75,9 @@
 
 
 _POLLING_STRATEGIES = {
-  'linux': ['epollsig', 'poll', 'poll-cv']
+  'linux': ['epollsig', 'poll', 'poll-cv'],
 # TODO(ctiller, sreecha): enable epoll1, epollex, epoll-thread-pool
+  'mac': ['poll'],
 }
 
 
@@ -340,7 +341,8 @@
     if self.platform == 'windows':
       # don't build tools on windows just yet
       return ['buildtests_%s' % self.make_target]
-    return ['buildtests_%s' % self.make_target, 'tools_%s' % self.make_target]
+    return ['buildtests_%s' % self.make_target, 'tools_%s' % self.make_target,
+            'check_epollexclusive']
 
   def make_options(self):
     return self._make_options;
@@ -1438,6 +1440,9 @@
     return True
   except subprocess.CalledProcessError, e:
     return False
+  except OSError, e:
+    # For languages other than C and Windows the binary won't exist
+    return False
 
 
 # returns a list of things that failed (or an empty list on success)
@@ -1457,7 +1462,7 @@
                                            suite_name=args.report_suite_name)
     return []
 
-  if not args.travis and not _has_epollexclusive() and 'epollex' in _POLLING_STRATEGIES[platform_string()]:
+  if not args.travis and not _has_epollexclusive() and platform_string() in _POLLING_STRATEGIES and 'epollex' in _POLLING_STRATEGIES[platform_string()]:
     print('\n\nOmitting EPOLLEXCLUSIVE tests\n\n')
     _POLLING_STRATEGIES[platform_string()].remove('epollex')
 
diff --git a/tools/run_tests/task_runner.py b/tools/run_tests/task_runner.py
index 0ec7efb..7feac29 100755
--- a/tools/run_tests/task_runner.py
+++ b/tools/run_tests/task_runner.py
@@ -40,6 +40,7 @@
 import artifacts.distribtest_targets as distribtest_targets
 import artifacts.package_targets as package_targets
 import python_utils.jobset as jobset
+import python_utils.report_utils as report_utils
 
 _TARGETS = []
 _TARGETS += artifact_targets.targets()
@@ -116,8 +117,10 @@
   sys.exit(1)
 
 jobset.message('START', 'Building targets.', do_newline=True)
-num_failures, _ = jobset.run(
+num_failures, resultset = jobset.run(
     build_jobs, newline_on_success=True, maxjobs=args.jobs)
+report_utils.render_junit_xml_report(resultset, 'report_taskrunner_sponge_log.xml',
+                                     suite_name='tasks')
 if num_failures == 0:
   jobset.message('SUCCESS', 'All targets built successfully.',
                  do_newline=True)
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index 2e8ccf8..97a75e7 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -824,6 +824,30 @@
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_full+workarounds_nosec_test", "vcxproj\test/end2end/fixtures\h2_full+workarounds_nosec_test\h2_full+workarounds_nosec_test.vcxproj", "{77F11A97-AECB-10F5-50E8-1482F658A2D3}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{47C2CB41-4E9F-58B6-F606-F6FAED5D00ED} = {47C2CB41-4E9F-58B6-F606-F6FAED5D00ED}
+		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF} = {0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}
+		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5} = {46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_full+workarounds_test", "vcxproj\test/end2end/fixtures\h2_full+workarounds_test\h2_full+workarounds_test.vcxproj", "{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{1F1F9084-2A93-B80E-364F-5754894AFAB4} = {1F1F9084-2A93-B80E-364F-5754894AFAB4}
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_full_nosec_test", "vcxproj\test/end2end/fixtures\h2_full_nosec_test\h2_full_nosec_test.vcxproj", "{345EA50E-BCD4-DAC7-E1C8-DDA6291B75E2}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -2979,6 +3003,38 @@
 		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release-DLL|Win32.Build.0 = Release|Win32
 		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release-DLL|x64.ActiveCfg = Release|x64
 		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release-DLL|x64.Build.0 = Release|x64
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Debug|Win32.ActiveCfg = Debug|Win32
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Debug|x64.ActiveCfg = Debug|x64
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Release|Win32.ActiveCfg = Release|Win32
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Release|x64.ActiveCfg = Release|x64
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Debug|Win32.Build.0 = Debug|Win32
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Debug|x64.Build.0 = Debug|x64
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Release|Win32.Build.0 = Release|Win32
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Release|x64.Build.0 = Release|x64
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Debug-DLL|x64.Build.0 = Debug|x64
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Release-DLL|Win32.Build.0 = Release|Win32
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Release-DLL|x64.ActiveCfg = Release|x64
+		{77F11A97-AECB-10F5-50E8-1482F658A2D3}.Release-DLL|x64.Build.0 = Release|x64
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Debug|Win32.ActiveCfg = Debug|Win32
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Debug|x64.ActiveCfg = Debug|x64
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Release|Win32.ActiveCfg = Release|Win32
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Release|x64.ActiveCfg = Release|x64
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Debug|Win32.Build.0 = Debug|Win32
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Debug|x64.Build.0 = Debug|x64
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Release|Win32.Build.0 = Release|Win32
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Release|x64.Build.0 = Release|x64
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Debug-DLL|x64.Build.0 = Debug|x64
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Release-DLL|Win32.Build.0 = Release|Win32
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Release-DLL|x64.ActiveCfg = Release|x64
+		{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}.Release-DLL|x64.Build.0 = Release|x64
 		{345EA50E-BCD4-DAC7-E1C8-DDA6291B75E2}.Debug|Win32.ActiveCfg = Debug|Win32
 		{345EA50E-BCD4-DAC7-E1C8-DDA6291B75E2}.Debug|x64.ActiveCfg = Debug|x64
 		{345EA50E-BCD4-DAC7-E1C8-DDA6291B75E2}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/protoc.props b/vsprojects/protoc.props
index 87fff8f..6c842c2 100644
--- a/vsprojects/protoc.props
+++ b/vsprojects/protoc.props
@@ -1 +1 @@
-<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <ImportGroup Label="PropertySheets" /> <PropertyGroup Label="UserMacros" /> <PropertyGroup /> <ItemDefinitionGroup> <ClCompile> <DisableSpecificWarnings>4244;4267;%(DisableSpecificWarnings)</DisableSpecificWarnings> </ClCompile> <Link> <AdditionalDependencies>libprotoc.lib;%(AdditionalDependencies)</AdditionalDependencies> <AdditionalLibraryDirectories>$(SolutionDir)\..\third_party\protobuf\cmake\build\solution\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories> </Link> </ItemDefinitionGroup> <ItemGroup /> </Project>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <ImportGroup Label="PropertySheets" /> <PropertyGroup Label="UserMacros" /> <PropertyGroup /> <ItemDefinitionGroup> <ClCompile> <DisableSpecificWarnings>4244;4267;4800;%(DisableSpecificWarnings)</DisableSpecificWarnings> </ClCompile> <Link> <AdditionalDependencies>libprotoc.lib;%(AdditionalDependencies)</AdditionalDependencies> <AdditionalLibraryDirectories>$(SolutionDir)\..\third_party\protobuf\cmake\build\solution\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories> </Link> </ItemDefinitionGroup> <ItemGroup /> </Project>
\ No newline at end of file
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
index f8fae96..ae51c43 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
@@ -361,6 +361,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
   </ItemGroup>
@@ -629,6 +630,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\executor.c">
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
index 7335375..12eef94 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
@@ -202,6 +202,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -825,6 +828,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h">
+      <Filter>include\grpc\support</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
@@ -1256,6 +1262,9 @@
     <Filter Include="include\grpc\impl\codegen">
       <UniqueIdentifier>{dc8bfccd-341f-26f0-8ee4-47dde62a6dd1}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc\support">
+      <UniqueIdentifier>{5ec10a44-9a09-9220-cf3b-b18ce6e4f70f}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src">
       <UniqueIdentifier>{328ff211-2886-406e-56f9-18ba1686f363}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
index 02e3399..bd10536 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
@@ -361,6 +361,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.h" />
@@ -613,6 +614,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\executor.c">
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
index 5d7f082..f1f4f17 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
@@ -187,6 +187,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -810,6 +813,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h">
+      <Filter>include\grpc\support</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.h">
@@ -1223,6 +1229,9 @@
     <Filter Include="include\grpc\impl\codegen">
       <UniqueIdentifier>{adf6b8e3-4a4b-cb35-bb3d-568af97b58d1}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc\support">
+      <UniqueIdentifier>{9d6d36f2-26e7-a66b-c19d-a958b80878d6}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src">
       <UniqueIdentifier>{cce6a85d-1111-3834-6825-31e170d93cff}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index d32958d..2ccda23 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -277,6 +277,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
@@ -514,6 +515,8 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\tracing.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\max_age\max_age_filter.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\message_size\message_size_filter.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_cronet_compression_filter.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_utils.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\init.c">
@@ -570,6 +573,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\executor.c">
@@ -1004,6 +1009,10 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\message_size\message_size_filter.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_cronet_compression_filter.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_utils.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\plugin_registry\grpc_plugin_registry.c">
     </ClCompile>
   </ItemGroup>
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 14aa7d4..3a1c1f9 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -82,6 +82,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -733,6 +736,12 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\message_size\message_size_filter.c">
       <Filter>src\core\ext\filters\message_size</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_cronet_compression_filter.c">
+      <Filter>src\core\ext\filters\workarounds</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_utils.c">
+      <Filter>src\core\ext\filters\workarounds</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\plugin_registry\grpc_plugin_registry.c">
       <Filter>src\core\plugin_registry</Filter>
     </ClCompile>
@@ -768,6 +777,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h">
+      <Filter>include\grpc\support</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -1475,6 +1487,12 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\message_size\message_size_filter.h">
       <Filter>src\core\ext\filters\message_size</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_cronet_compression_filter.h">
+      <Filter>src\core\ext\filters\workarounds</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_utils.h">
+      <Filter>src\core\ext\filters\workarounds</Filter>
+    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
@@ -1490,6 +1508,9 @@
     <Filter Include="include\grpc\impl\codegen">
       <UniqueIdentifier>{def748f5-ed2a-a9bb-40d9-c31d00f0e13b}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc\support">
+      <UniqueIdentifier>{31de82ea-dc6c-73fb-a640-979b8a7b240c}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src">
       <UniqueIdentifier>{d538af37-07b2-062b-fa2a-d9f882cb2737}</UniqueIdentifier>
     </Filter>
@@ -1574,6 +1595,9 @@
     <Filter Include="src\core\ext\filters\message_size">
       <UniqueIdentifier>{5ca3f38c-539f-3c4f-b68c-38b31ba339ba}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\ext\filters\workarounds">
+      <UniqueIdentifier>{2ec64619-e2c4-da0f-c10e-e03f5a151300}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\ext\transport">
       <UniqueIdentifier>{e3abfd0a-064e-0f2f-c8e8-7c5a7e98142a}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
index 2f245d5..061fca6 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
@@ -157,6 +157,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
@@ -402,6 +403,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\executor.c">
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
index d2caf22..35d0ea0 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
@@ -139,6 +139,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -471,6 +474,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h">
+      <Filter>include\grpc\support</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -935,6 +941,9 @@
     <Filter Include="include\grpc\impl\codegen">
       <UniqueIdentifier>{8e97f1e1-f4d1-a56e-0837-7901778fb3b9}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc\support">
+      <UniqueIdentifier>{b783a829-3703-129f-39ee-528ac0a06e06}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src">
       <UniqueIdentifier>{7d107d7c-1da3-9525-3ba1-3a411b552ea8}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 88fa5b1..d084d70 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -268,6 +268,7 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\slice_buffer.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\compression_types.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\connectivity_state.h" />
@@ -479,6 +480,8 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\census\tracing.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\max_age\max_age_filter.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\message_size\message_size_filter.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_cronet_compression_filter.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_utils.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\init.c">
@@ -537,6 +540,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\executor.c">
@@ -911,6 +916,10 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\message_size\message_size_filter.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_cronet_compression_filter.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_utils.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\plugin_registry\grpc_unsecure_plugin_registry.c">
     </ClCompile>
   </ItemGroup>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 87d7f53..ba82685 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -85,6 +85,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_windows.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -646,6 +649,12 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\message_size\message_size_filter.c">
       <Filter>src\core\ext\filters\message_size</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_cronet_compression_filter.c">
+      <Filter>src\core\ext\filters\workarounds</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_utils.c">
+      <Filter>src\core\ext\filters\workarounds</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\plugin_registry\grpc_unsecure_plugin_registry.c">
       <Filter>src\core\plugin_registry</Filter>
     </ClCompile>
@@ -681,6 +690,9 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\include\grpc\support\workaround_list.h">
+      <Filter>include\grpc\support</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\byte_buffer_reader.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
@@ -1310,6 +1322,12 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\message_size\message_size_filter.h">
       <Filter>src\core\ext\filters\message_size</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_cronet_compression_filter.h">
+      <Filter>src\core\ext\filters\workarounds</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\filters\workarounds\workaround_utils.h">
+      <Filter>src\core\ext\filters\workarounds</Filter>
+    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
@@ -1325,6 +1343,9 @@
     <Filter Include="include\grpc\impl\codegen">
       <UniqueIdentifier>{03cc6735-c734-7017-4000-a435f29d55c3}</UniqueIdentifier>
     </Filter>
+    <Filter Include="include\grpc\support">
+      <UniqueIdentifier>{a553e3dc-8973-1b23-8be4-31852fd9e429}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src">
       <UniqueIdentifier>{aaf326a1-c884-46ea-875a-cbbd9983e539}</UniqueIdentifier>
     </Filter>
@@ -1409,6 +1430,9 @@
     <Filter Include="src\core\ext\filters\message_size">
       <UniqueIdentifier>{8cbe7444-caac-49dc-be89-d4c4d1c7966a}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\ext\filters\workarounds">
+      <UniqueIdentifier>{8bd0612e-bd53-c9e6-7b3c-20937e4e1e9e}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\ext\transport">
       <UniqueIdentifier>{967c89fe-c97c-27e2-aac0-9ba5854cb5fa}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_nosec_test/h2_full+workarounds_nosec_test.vcxproj b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_nosec_test/h2_full+workarounds_nosec_test.vcxproj
new file mode 100644
index 0000000..3382da8
--- /dev/null
+++ b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_nosec_test/h2_full+workarounds_nosec_test.vcxproj
@@ -0,0 +1,191 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{77F11A97-AECB-10F5-50E8-1482F658A2D3}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>h2_full+workarounds_nosec_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>h2_full+workarounds_nosec_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
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+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
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+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_full+workarounds.c">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\test/end2end/tests\end2end_nosec_tests\end2end_nosec_tests.vcxproj">
+      <Project>{47C2CB41-4E9F-58B6-F606-F6FAED5D00ED}</Project>
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+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc_test_util_unsecure\grpc_test_util_unsecure.vcxproj">
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+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc_unsecure\grpc_unsecure.vcxproj">
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+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr_test_util\gpr_test_util.vcxproj">
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+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
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+  <ItemGroup>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
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+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" />
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+</Project>
+
diff --git a/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_nosec_test/h2_full+workarounds_nosec_test.vcxproj.filters b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_nosec_test/h2_full+workarounds_nosec_test.vcxproj.filters
new file mode 100644
index 0000000..508fdb0
--- /dev/null
+++ b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_nosec_test/h2_full+workarounds_nosec_test.vcxproj.filters
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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+  <ItemGroup>
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+    <Filter Include="test\core">
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diff --git a/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_test/h2_full+workarounds_test.vcxproj b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_test/h2_full+workarounds_test.vcxproj
new file mode 100644
index 0000000..2275317
--- /dev/null
+++ b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_test/h2_full+workarounds_test.vcxproj
@@ -0,0 +1,202 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{64FEC2E4-20E0-6673-DDC5-12322D26ACEE}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>h2_full+workarounds_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>h2_full+workarounds_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_full+workarounds.c">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\test/end2end/tests\end2end_tests\end2end_tests.vcxproj">
+      <Project>{1F1F9084-2A93-B80E-364F-5754894AFAB4}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc_test_util\grpc_test_util.vcxproj">
+      <Project>{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc\grpc.vcxproj">
+      <Project>{29D16885-7228-4C31-81ED-5F9187C7F2A9}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr_test_util\gpr_test_util.vcxproj">
+      <Project>{EAB0A629-17A9-44DB-B5FF-E91A721FE037}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
+      <Project>{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" />
+  </Target>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_test/h2_full+workarounds_test.vcxproj.filters b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_test/h2_full+workarounds_test.vcxproj.filters
new file mode 100644
index 0000000..ed6579c
--- /dev/null
+++ b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+workarounds_test/h2_full+workarounds_test.vcxproj.filters
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_full+workarounds.c">
+      <Filter>test\core\end2end\fixtures</Filter>
+    </ClCompile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Filter Include="test">
+      <UniqueIdentifier>{e1fc3c56-15d3-b30e-4abe-d0bf3ce5274c}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\core">
+      <UniqueIdentifier>{741cc9d4-6e6a-0571-83c6-f9d3b60c075e}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\core\end2end">
+      <UniqueIdentifier>{764873d7-3feb-0133-cfe8-3c5fb4b9c259}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\core\end2end\fixtures">
+      <UniqueIdentifier>{1bc3f78e-5318-085d-7fe9-aaa95bfef3b1}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
index e3adf79..8581f0c 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
@@ -255,6 +255,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\trailing_metadata.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\workaround_cronet_compression.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\write_buffering.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\write_buffering_at_end.c">
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
index cfb8d04..ae2937b 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
@@ -157,6 +157,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\trailing_metadata.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\workaround_cronet_compression.c">
+      <Filter>test\core\end2end\tests</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\write_buffering.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
index a67f509..1bd0998 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
@@ -257,6 +257,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\trailing_metadata.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\workaround_cronet_compression.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\write_buffering.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\write_buffering_at_end.c">
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
index 97ba77a..217c60e 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
@@ -160,6 +160,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\trailing_metadata.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\workaround_cronet_compression.c">
+      <Filter>test\core\end2end\tests</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\write_buffering.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>