Merge "Fix read barriers in VisitDexCachePairs"
diff --git a/build/Android.gtest.mk b/build/Android.gtest.mk
index 4f273e5..c785bef 100644
--- a/build/Android.gtest.mk
+++ b/build/Android.gtest.mk
@@ -105,7 +105,7 @@
 ART_GTEST_stub_test_DEX_DEPS := AllFields
 ART_GTEST_transaction_test_DEX_DEPS := Transaction
 ART_GTEST_type_lookup_table_test_DEX_DEPS := Lookup
-ART_GTEST_verifier_deps_test_DEX_DEPS := VerifierDeps
+ART_GTEST_verifier_deps_test_DEX_DEPS := VerifierDeps MultiDex
 
 # The elf writer test has dependencies on core.oat.
 ART_GTEST_elf_writer_test_HOST_DEPS := $(HOST_CORE_IMAGE_optimizing_no-pic_64) $(HOST_CORE_IMAGE_optimizing_no-pic_32)
diff --git a/compiler/image_writer.cc b/compiler/image_writer.cc
index d1ac139..59f339a 100644
--- a/compiler/image_writer.cc
+++ b/compiler/image_writer.cc
@@ -963,21 +963,21 @@
 mirror::String* ImageWriter::FindInternedString(mirror::String* string) {
   Thread* const self = Thread::Current();
   for (const ImageInfo& image_info : image_infos_) {
-    mirror::String* const found = image_info.intern_table_->LookupStrong(self, string);
+    ObjPtr<mirror::String> const found = image_info.intern_table_->LookupStrong(self, string);
     DCHECK(image_info.intern_table_->LookupWeak(self, string) == nullptr)
         << string->ToModifiedUtf8();
     if (found != nullptr) {
-      return found;
+      return found.Ptr();
     }
   }
   if (compile_app_image_) {
     Runtime* const runtime = Runtime::Current();
-    mirror::String* found = runtime->GetInternTable()->LookupStrong(self, string);
+    ObjPtr<mirror::String> found = runtime->GetInternTable()->LookupStrong(self, string);
     // If we found it in the runtime intern table it could either be in the boot image or interned
     // during app image compilation. If it was in the boot image return that, otherwise return null
     // since it belongs to another image space.
-    if (found != nullptr && runtime->GetHeap()->ObjectIsInBootImageSpace(found)) {
-      return found;
+    if (found != nullptr && runtime->GetHeap()->ObjectIsInBootImageSpace(found.Ptr())) {
+      return found.Ptr();
     }
     DCHECK(runtime->GetInternTable()->LookupWeak(self, string) == nullptr)
         << string->ToModifiedUtf8();
@@ -1088,7 +1088,8 @@
       mirror::String* interned = FindInternedString(obj->AsString());
       if (interned == nullptr) {
         // Not in another image space, insert to our table.
-        interned = GetImageInfo(oat_index).intern_table_->InternStrongImageString(obj->AsString());
+        interned =
+            GetImageInfo(oat_index).intern_table_->InternStrongImageString(obj->AsString()).Ptr();
         DCHECK_EQ(interned, obj);
       }
     } else if (obj->IsDexCache()) {
@@ -1448,7 +1449,7 @@
     for (size_t i = 0, count = dex_file->NumStringIds(); i < count; ++i) {
       uint32_t utf16_length;
       const char* utf8_data = dex_file->StringDataAndUtf16LengthByIdx(i, &utf16_length);
-      mirror::String* string = intern_table->LookupStrong(self, utf16_length, utf8_data);
+      mirror::String* string = intern_table->LookupStrong(self, utf16_length, utf8_data).Ptr();
       TryAssignBinSlot(work_stack, string, oat_index);
     }
   }
diff --git a/compiler/oat_writer.cc b/compiler/oat_writer.cc
index 6cbca7a..f9173f5 100644
--- a/compiler/oat_writer.cc
+++ b/compiler/oat_writer.cc
@@ -1759,7 +1759,7 @@
   }
 
   std::vector<uint8_t> buffer;
-  verifier_deps->Encode(&buffer);
+  verifier_deps->Encode(*dex_files_, &buffer);
 
   if (!vdex_out->WriteFully(buffer.data(), buffer.size())) {
     PLOG(ERROR) << "Failed to write verifier deps."
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index 8c76927..19fd6f9 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -170,6 +170,15 @@
     if (visualizer_enabled_) {
       MutexLock mu(Thread::Current(), visualizer_dump_mutex_);
       *visualizer_output_ << visualizer_oss_.str();
+      // The destructor of `visualizer_output_` is normally
+      // responsible for flushing (and closing) the stream, but it
+      // won't be invoked during fast exits in non-debug mode -- see
+      // art::Dex2Oat::~Dex2Oat, which explicitly abandons some
+      // objects (such as the compiler driver) in non-debug mode, to
+      // avoid the cost of destructing them.  Therefore we explicitly
+      // flush the stream here to prevent truncated CFG visualizer
+      // files.
+      visualizer_output_->flush();
     }
   }
 
diff --git a/compiler/verifier_deps_test.cc b/compiler/verifier_deps_test.cc
index 9664e43..3a53998 100644
--- a/compiler/verifier_deps_test.cc
+++ b/compiler/verifier_deps_test.cc
@@ -79,17 +79,24 @@
     callbacks->SetVerifierDeps(verifier_deps_.get());
   }
 
+  void LoadDexFile(ScopedObjectAccess* soa, const char* name1, const char* name2 = nullptr)
+      REQUIRES_SHARED(Locks::mutator_lock_) {
+    class_loader_ = (name2 == nullptr) ? LoadDex(name1) : LoadMultiDex(name1, name2);
+    dex_files_ = GetDexFiles(class_loader_);
+    primary_dex_file_ = dex_files_.front();
+
+    SetVerifierDeps(dex_files_);
+    StackHandleScope<1> hs(soa->Self());
+    Handle<mirror::ClassLoader> loader =
+        hs.NewHandle(soa->Decode<mirror::ClassLoader>(class_loader_));
+    for (const DexFile* dex_file : dex_files_) {
+      class_linker_->RegisterDexFile(*dex_file, loader.Get());
+    }
+  }
+
   void LoadDexFile(ScopedObjectAccess* soa) REQUIRES_SHARED(Locks::mutator_lock_) {
-    class_loader_ = LoadDex("VerifierDeps");
-    std::vector<const DexFile*> dex_files = GetDexFiles(class_loader_);
-    CHECK_EQ(dex_files.size(), 1u);
-    dex_file_ = dex_files.front();
-
-    SetVerifierDeps(dex_files);
-
-    ObjPtr<mirror::ClassLoader> loader = soa->Decode<mirror::ClassLoader>(class_loader_);
-    class_linker_->RegisterDexFile(*dex_file_, loader.Ptr());
-
+    LoadDexFile(soa, "VerifierDeps");
+    CHECK_EQ(dex_files_.size(), 1u);
     klass_Main_ = FindClassByName("LMain;", soa);
     CHECK(klass_Main_ != nullptr);
   }
@@ -98,16 +105,16 @@
     ScopedObjectAccess soa(Thread::Current());
     LoadDexFile(&soa);
 
-    StackHandleScope<2> hs(Thread::Current());
+    StackHandleScope<2> hs(soa.Self());
     Handle<mirror::ClassLoader> class_loader_handle(
         hs.NewHandle(soa.Decode<mirror::ClassLoader>(class_loader_)));
     Handle<mirror::DexCache> dex_cache_handle(hs.NewHandle(klass_Main_->GetDexCache()));
 
     const DexFile::ClassDef* class_def = klass_Main_->GetClassDef();
-    const uint8_t* class_data = dex_file_->GetClassData(*class_def);
+    const uint8_t* class_data = primary_dex_file_->GetClassData(*class_def);
     CHECK(class_data != nullptr);
 
-    ClassDataItemIterator it(*dex_file_, class_data);
+    ClassDataItemIterator it(*primary_dex_file_, class_data);
     while (it.HasNextStaticField() || it.HasNextInstanceField()) {
       it.Next();
     }
@@ -115,7 +122,7 @@
     ArtMethod* method = nullptr;
     while (it.HasNextDirectMethod()) {
       ArtMethod* resolved_method = class_linker_->ResolveMethod<ClassLinker::kNoICCECheckForCache>(
-          *dex_file_,
+          *primary_dex_file_,
           it.GetMemberIndex(),
           dex_cache_handle,
           class_loader_handle,
@@ -131,7 +138,7 @@
     CHECK(method != nullptr);
 
     MethodVerifier verifier(Thread::Current(),
-                            dex_file_,
+                            primary_dex_file_,
                             dex_cache_handle,
                             class_loader_handle,
                             *class_def,
@@ -148,19 +155,16 @@
     return !verifier.HasFailures();
   }
 
-  void VerifyDexFile() {
+  void VerifyDexFile(const char* multidex = nullptr) {
     std::string error_msg;
     {
       ScopedObjectAccess soa(Thread::Current());
-      LoadDexFile(&soa);
+      LoadDexFile(&soa, "VerifierDeps", multidex);
     }
-    SetVerifierDeps({ dex_file_ });
     TimingLogger timings("Verify", false, false);
-    std::vector<const DexFile*> dex_files;
-    dex_files.push_back(dex_file_);
     compiler_options_->boot_image_ = false;
     compiler_driver_->InitializeThreadPools();
-    compiler_driver_->Verify(class_loader_, dex_files, &timings);
+    compiler_driver_->Verify(class_loader_, dex_files_, &timings);
   }
 
   bool TestAssignabilityRecording(const std::string& dst,
@@ -173,7 +177,7 @@
     DCHECK(klass_dst != nullptr);
     mirror::Class* klass_src = FindClassByName(src, &soa);
     DCHECK(klass_src != nullptr);
-    verifier_deps_->AddAssignability(*dex_file_,
+    verifier_deps_->AddAssignability(*primary_dex_file_,
                                      klass_dst,
                                      klass_src,
                                      is_strict,
@@ -182,9 +186,9 @@
   }
 
   bool HasUnverifiedClass(const std::string& cls) {
-    const DexFile::TypeId* type_id = dex_file_->FindTypeId(cls.c_str());
+    const DexFile::TypeId* type_id = primary_dex_file_->FindTypeId(cls.c_str());
     DCHECK(type_id != nullptr);
-    uint16_t index = dex_file_->GetIndexForTypeId(*type_id);
+    uint16_t index = primary_dex_file_->GetIndexForTypeId(*type_id);
     MutexLock mu(Thread::Current(), *Locks::verifier_deps_lock_);
     for (const auto& dex_dep : verifier_deps_->dex_deps_) {
       for (uint16_t entry : dex_dep.second->unverified_classes_) {
@@ -396,7 +400,8 @@
   }
 
   std::unique_ptr<verifier::VerifierDeps> verifier_deps_;
-  const DexFile* dex_file_;
+  std::vector<const DexFile*> dex_files_;
+  const DexFile* primary_dex_file_;
   jobject class_loader_;
   mirror::Class* klass_Main_;
 };
@@ -407,21 +412,21 @@
 
   MutexLock mu(Thread::Current(), *Locks::verifier_deps_lock_);
 
-  uint32_t id_Main1 = verifier_deps_->GetIdFromString(*dex_file_, "LMain;");
-  ASSERT_LT(id_Main1, dex_file_->NumStringIds());
-  ASSERT_EQ("LMain;", verifier_deps_->GetStringFromId(*dex_file_, id_Main1));
+  uint32_t id_Main1 = verifier_deps_->GetIdFromString(*primary_dex_file_, "LMain;");
+  ASSERT_LT(id_Main1, primary_dex_file_->NumStringIds());
+  ASSERT_EQ("LMain;", verifier_deps_->GetStringFromId(*primary_dex_file_, id_Main1));
 
-  uint32_t id_Main2 = verifier_deps_->GetIdFromString(*dex_file_, "LMain;");
-  ASSERT_LT(id_Main2, dex_file_->NumStringIds());
-  ASSERT_EQ("LMain;", verifier_deps_->GetStringFromId(*dex_file_, id_Main2));
+  uint32_t id_Main2 = verifier_deps_->GetIdFromString(*primary_dex_file_, "LMain;");
+  ASSERT_LT(id_Main2, primary_dex_file_->NumStringIds());
+  ASSERT_EQ("LMain;", verifier_deps_->GetStringFromId(*primary_dex_file_, id_Main2));
 
-  uint32_t id_Lorem1 = verifier_deps_->GetIdFromString(*dex_file_, "Lorem ipsum");
-  ASSERT_GE(id_Lorem1, dex_file_->NumStringIds());
-  ASSERT_EQ("Lorem ipsum", verifier_deps_->GetStringFromId(*dex_file_, id_Lorem1));
+  uint32_t id_Lorem1 = verifier_deps_->GetIdFromString(*primary_dex_file_, "Lorem ipsum");
+  ASSERT_GE(id_Lorem1, primary_dex_file_->NumStringIds());
+  ASSERT_EQ("Lorem ipsum", verifier_deps_->GetStringFromId(*primary_dex_file_, id_Lorem1));
 
-  uint32_t id_Lorem2 = verifier_deps_->GetIdFromString(*dex_file_, "Lorem ipsum");
-  ASSERT_GE(id_Lorem2, dex_file_->NumStringIds());
-  ASSERT_EQ("Lorem ipsum", verifier_deps_->GetStringFromId(*dex_file_, id_Lorem2));
+  uint32_t id_Lorem2 = verifier_deps_->GetIdFromString(*primary_dex_file_, "Lorem ipsum");
+  ASSERT_GE(id_Lorem2, primary_dex_file_->NumStringIds());
+  ASSERT_EQ("Lorem ipsum", verifier_deps_->GetStringFromId(*primary_dex_file_, id_Lorem2));
 
   ASSERT_EQ(id_Main1, id_Main2);
   ASSERT_EQ(id_Lorem1, id_Lorem2);
@@ -1068,13 +1073,41 @@
   ASSERT_TRUE(HasEachKindOfRecord());
 
   std::vector<uint8_t> buffer;
-  verifier_deps_->Encode(&buffer);
+  verifier_deps_->Encode(dex_files_, &buffer);
   ASSERT_FALSE(buffer.empty());
 
-  VerifierDeps decoded_deps({ dex_file_ }, ArrayRef<uint8_t>(buffer));
+  VerifierDeps decoded_deps(dex_files_, ArrayRef<const uint8_t>(buffer));
   ASSERT_TRUE(verifier_deps_->Equals(decoded_deps));
 }
 
+TEST_F(VerifierDepsTest, EncodeDecodeMulti) {
+  VerifyDexFile("MultiDex");
+
+  ASSERT_GT(NumberOfCompiledDexFiles(), 1u);
+  std::vector<uint8_t> buffer;
+  verifier_deps_->Encode(dex_files_, &buffer);
+  ASSERT_FALSE(buffer.empty());
+
+  // Create new DexFile, to mess with std::map order: the verifier deps used
+  // to iterate over the map, which doesn't guarantee insertion order. We fixed
+  // this by passing the expected order when encoding/decoding.
+  std::vector<std::unique_ptr<const DexFile>> first_dex_files = OpenTestDexFiles("VerifierDeps");
+  std::vector<std::unique_ptr<const DexFile>> second_dex_files = OpenTestDexFiles("MultiDex");
+  std::vector<const DexFile*> dex_files;
+  for (auto& dex_file : first_dex_files) {
+    dex_files.push_back(dex_file.get());
+  }
+  for (auto& dex_file : second_dex_files) {
+    dex_files.push_back(dex_file.get());
+  }
+
+  // Dump the new verifier deps to ensure it can properly read the data.
+  VerifierDeps decoded_deps(dex_files, ArrayRef<const uint8_t>(buffer));
+  std::ostringstream stream;
+  VariableIndentationOutputStream os(&stream);
+  decoded_deps.Dump(&os);
+}
+
 TEST_F(VerifierDepsTest, UnverifiedClasses) {
   VerifyDexFile();
   ASSERT_FALSE(HasUnverifiedClass("LMyThread;"));
diff --git a/oatdump/oatdump.cc b/oatdump/oatdump.cc
index da0db01..3d208b5 100644
--- a/oatdump/oatdump.cc
+++ b/oatdump/oatdump.cc
@@ -66,6 +66,7 @@
 #include "type_lookup_table.h"
 #include "vdex_file.h"
 #include "verifier/method_verifier.h"
+#include "verifier/verifier_deps.h"
 #include "well_known_classes.h"
 
 #include <sys/stat.h>
@@ -483,6 +484,28 @@
     os << "\n";
 
     if (!options_.dump_header_only_) {
+      VariableIndentationOutputStream vios(&os);
+      VdexFile::Header vdex_header = oat_file_.GetVdexFile()->GetHeader();
+      if (vdex_header.IsValid()) {
+        std::string error_msg;
+        std::vector<const DexFile*> dex_files;
+        for (size_t i = 0; i < oat_dex_files_.size(); i++) {
+          const DexFile* dex_file = OpenDexFile(oat_dex_files_[i], &error_msg);
+          if (dex_file == nullptr) {
+            os << "Error opening dex file: " << error_msg << std::endl;
+            return false;
+          }
+          dex_files.push_back(dex_file);
+        }
+        verifier::VerifierDeps deps(dex_files, oat_file_.GetVdexFile()->GetVerifierDepsData());
+        deps.Dump(&vios);
+      } else {
+        os << "UNRECOGNIZED vdex file, magic "
+           << vdex_header.GetMagic()
+           << ", version "
+           << vdex_header.GetVersion()
+           << "\n";
+      }
       for (size_t i = 0; i < oat_dex_files_.size(); i++) {
         const OatFile::OatDexFile* oat_dex_file = oat_dex_files_[i];
         CHECK(oat_dex_file != nullptr);
diff --git a/runtime/Android.bp b/runtime/Android.bp
index b498573..8f961af 100644
--- a/runtime/Android.bp
+++ b/runtime/Android.bp
@@ -123,6 +123,7 @@
         "mirror/array.cc",
         "mirror/class.cc",
         "mirror/dex_cache.cc",
+        "mirror/emulated_stack_frame.cc",
         "mirror/executable.cc",
         "mirror/field.cc",
         "mirror/method.cc",
diff --git a/runtime/arch/stub_test.cc b/runtime/arch/stub_test.cc
index 4638c3f..c151f00 100644
--- a/runtime/arch/stub_test.cc
+++ b/runtime/arch/stub_test.cc
@@ -819,34 +819,60 @@
   ScopedObjectAccess soa(self);
   // garbage is created during ClassLinker::Init
 
-  StackHandleScope<2> hs(soa.Self());
+  StackHandleScope<4> hs(soa.Self());
   Handle<mirror::Class> c(
       hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/lang/Object;")));
   Handle<mirror::Class> c2(
       hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/lang/String;")));
+  Handle<mirror::Class> list(
+      hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/util/List;")));
+  Handle<mirror::Class> array_list(
+      hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/util/ArrayList;")));
 
   EXPECT_FALSE(self->IsExceptionPending());
 
-  Invoke3(reinterpret_cast<size_t>(c.Get()), reinterpret_cast<size_t>(c.Get()), 0U,
-          art_quick_check_cast, self);
-
+  Invoke3(reinterpret_cast<size_t>(c.Get()),
+          reinterpret_cast<size_t>(c.Get()),
+          0U,
+          art_quick_check_cast,
+          self);
   EXPECT_FALSE(self->IsExceptionPending());
 
-  Invoke3(reinterpret_cast<size_t>(c2.Get()), reinterpret_cast<size_t>(c2.Get()), 0U,
-          art_quick_check_cast, self);
-
+  Invoke3(reinterpret_cast<size_t>(c2.Get()),
+          reinterpret_cast<size_t>(c2.Get()),
+          0U,
+          art_quick_check_cast,
+          self);
   EXPECT_FALSE(self->IsExceptionPending());
 
-  Invoke3(reinterpret_cast<size_t>(c.Get()), reinterpret_cast<size_t>(c2.Get()), 0U,
-          art_quick_check_cast, self);
-
+  Invoke3(reinterpret_cast<size_t>(c.Get()),
+          reinterpret_cast<size_t>(c2.Get()),
+          0U,
+          art_quick_check_cast,
+          self);
   EXPECT_FALSE(self->IsExceptionPending());
 
+  Invoke3(reinterpret_cast<size_t>(list.Get()),
+          reinterpret_cast<size_t>(array_list.Get()),
+          0U,
+          art_quick_check_cast,
+          self);
+  EXPECT_FALSE(self->IsExceptionPending());
+
+  Invoke3(reinterpret_cast<size_t>(list.Get()),
+          reinterpret_cast<size_t>(c2.Get()),
+          0U,
+          art_quick_check_cast,
+          self);
+  EXPECT_TRUE(self->IsExceptionPending());
+  self->ClearException();
+
   // TODO: Make the following work. But that would require correct managed frames.
-
-  Invoke3(reinterpret_cast<size_t>(c2.Get()), reinterpret_cast<size_t>(c.Get()), 0U,
-          art_quick_check_cast, self);
-
+  Invoke3(reinterpret_cast<size_t>(c2.Get()),
+          reinterpret_cast<size_t>(c.Get()),
+          0U,
+          art_quick_check_cast,
+          self);
   EXPECT_TRUE(self->IsExceptionPending());
   self->ClearException();
 
diff --git a/runtime/arch/x86_64/quick_entrypoints_x86_64.S b/runtime/arch/x86_64/quick_entrypoints_x86_64.S
index afa1c0f..49e1b56 100644
--- a/runtime/arch/x86_64/quick_entrypoints_x86_64.S
+++ b/runtime/arch/x86_64/quick_entrypoints_x86_64.S
@@ -1481,6 +1481,32 @@
 END_FUNCTION art_quick_unlock_object_no_inline
 
 DEFINE_FUNCTION art_quick_check_cast
+    testl LITERAL(ACCESS_FLAGS_CLASS_IS_INTERFACE), MIRROR_CLASS_ACCESS_FLAGS_OFFSET(%rdi)
+    jz .Lnot_interface
+
+    // There are no read barriers since the iftable is immutable. There can be false negatives for
+    // the read barrier case if classes in the IfTable are in the from-space. In the case where
+    // we do not find a matching interface we call into artIsAssignableFromCode which will have
+    // read barriers.
+    movl MIRROR_CLASS_IF_TABLE_OFFSET(%rsi), %ecx
+    UNPOISON_HEAP_REF %ecx
+    testl %ecx, %ecx
+    jz .Lnot_interface
+    movl MIRROR_ARRAY_LENGTH_OFFSET(%rcx), %r8d
+.Lstart_loop:
+    // Re-poison before comparing to prevent rare possible false positives. This is done inside
+    // the loop since heap poisoning is only for testing builds.
+    POISON_HEAP_REF %edi
+    cmpl MIRROR_OBJECT_ARRAY_DATA_OFFSET(%rcx), %edi
+    je .Lreturn  // Return if same class.
+    UNPOISON_HEAP_REF %edi
+    // Go to next interface.
+    add LITERAL(COMPRESSED_REFERENCE_SIZE * 2), %rcx
+    sub LITERAL(2), %r8
+    jnz .Lstart_loop
+
+.Lnot_interface:
+    // We could check the super classes here but that is usually already checked in the caller.
     PUSH rdi                          // Save args for exc
     PUSH rsi
     subq LITERAL(8), %rsp             // Alignment padding.
@@ -1493,6 +1519,7 @@
     addq LITERAL(24), %rsp            // pop arguments
     CFI_ADJUST_CFA_OFFSET(-24)
 
+.Lreturn:
     ret
 
     CFI_ADJUST_CFA_OFFSET(24 + 4 * 8)  // Reset unwind info so following code unwinds.
diff --git a/runtime/asm_support.h b/runtime/asm_support.h
index cd8815b..1e5e127 100644
--- a/runtime/asm_support.h
+++ b/runtime/asm_support.h
@@ -172,6 +172,9 @@
 #define MIRROR_CLASS_COMPONENT_TYPE_OFFSET (4 + MIRROR_OBJECT_HEADER_SIZE)
 ADD_TEST_EQ(MIRROR_CLASS_COMPONENT_TYPE_OFFSET,
             art::mirror::Class::ComponentTypeOffset().Int32Value())
+#define MIRROR_CLASS_IF_TABLE_OFFSET (12 + MIRROR_OBJECT_HEADER_SIZE)
+ADD_TEST_EQ(MIRROR_CLASS_IF_TABLE_OFFSET,
+            art::mirror::Class::IfTableOffset().Int32Value())
 #define MIRROR_CLASS_ACCESS_FLAGS_OFFSET (64 + MIRROR_OBJECT_HEADER_SIZE)
 ADD_TEST_EQ(MIRROR_CLASS_ACCESS_FLAGS_OFFSET,
             art::mirror::Class::AccessFlagsOffset().Int32Value())
diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index 7f15a16..d3d30d4 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -70,6 +70,7 @@
 #include "mirror/class_loader.h"
 #include "mirror/dex_cache.h"
 #include "mirror/dex_cache-inl.h"
+#include "mirror/emulated_stack_frame.h"
 #include "mirror/field.h"
 #include "mirror/iftable-inl.h"
 #include "mirror/method.h"
@@ -650,6 +651,11 @@
   SetClassRoot(kJavaLangInvokeMethodHandleImpl, class_root);
   mirror::MethodHandleImpl::SetClass(class_root);
 
+  class_root = FindSystemClass(self, "Ldalvik/system/EmulatedStackFrame;");
+  CHECK(class_root != nullptr);
+  SetClassRoot(kDalvikSystemEmulatedStackFrame, class_root);
+  mirror::EmulatedStackFrame::SetClass(class_root);
+
   // java.lang.ref classes need to be specially flagged, but otherwise are normal classes
   // finish initializing Reference class
   mirror::Class::SetStatus(java_lang_ref_Reference, mirror::Class::kStatusNotReady, self);
@@ -1059,6 +1065,7 @@
   mirror::ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
   mirror::Throwable::SetClass(GetClassRoot(kJavaLangThrowable));
   mirror::StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
+  mirror::EmulatedStackFrame::SetClass(GetClassRoot(kDalvikSystemEmulatedStackFrame));
 
   for (gc::space::ImageSpace* image_space : spaces) {
     // Boot class loader, use a null handle.
@@ -1119,7 +1126,7 @@
   DCHECK(error_msg != nullptr);
   ScopedObjectAccessUnchecked soa(Thread::Current());
   ArtField* const dex_path_list_field =
-      soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList);
+      soa.DecodeField(WellKnownClasses::dalvik_system_BaseDexClassLoader_pathList);
   ArtField* const dex_elements_field =
       soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList_dexElements);
   CHECK(dex_path_list_field != nullptr);
@@ -2038,6 +2045,7 @@
   mirror::ShortArray::ResetArrayClass();
   mirror::MethodType::ResetClass();
   mirror::MethodHandleImpl::ResetClass();
+  mirror::EmulatedStackFrame::ResetClass();
   Thread* const self = Thread::Current();
   for (const ClassLoaderData& data : class_loaders_) {
     DeleteClassLoader(self, data);
@@ -2321,12 +2329,12 @@
   return ClassPathEntry(nullptr, nullptr);
 }
 
-bool ClassLinker::FindClassInPathClassLoader(ScopedObjectAccessAlreadyRunnable& soa,
-                                             Thread* self,
-                                             const char* descriptor,
-                                             size_t hash,
-                                             Handle<mirror::ClassLoader> class_loader,
-                                             ObjPtr<mirror::Class>* result) {
+bool ClassLinker::FindClassInBaseDexClassLoader(ScopedObjectAccessAlreadyRunnable& soa,
+                                                Thread* self,
+                                                const char* descriptor,
+                                                size_t hash,
+                                                Handle<mirror::ClassLoader> class_loader,
+                                                ObjPtr<mirror::Class>* result) {
   // Termination case: boot class-loader.
   if (IsBootClassLoader(soa, class_loader.Get())) {
     // The boot class loader, search the boot class path.
@@ -2356,14 +2364,24 @@
   // Unsupported class-loader?
   if (soa.Decode<mirror::Class>(WellKnownClasses::dalvik_system_PathClassLoader) !=
       class_loader->GetClass()) {
-    *result = nullptr;
-    return false;
+    // PathClassLoader is the most common case, so it's the one we check first. For secondary dex
+    // files, we also check DexClassLoader here.
+    if (soa.Decode<mirror::Class>(WellKnownClasses::dalvik_system_DexClassLoader) !=
+        class_loader->GetClass()) {
+      *result = nullptr;
+      return false;
+    }
   }
 
   // Handles as RegisterDexFile may allocate dex caches (and cause thread suspension).
   StackHandleScope<4> hs(self);
   Handle<mirror::ClassLoader> h_parent(hs.NewHandle(class_loader->GetParent()));
-  bool recursive_result = FindClassInPathClassLoader(soa, self, descriptor, hash, h_parent, result);
+  bool recursive_result = FindClassInBaseDexClassLoader(soa,
+                                                        self,
+                                                        descriptor,
+                                                        hash,
+                                                        h_parent,
+                                                        result);
 
   if (!recursive_result) {
     // Something wrong up the chain.
@@ -2383,7 +2401,7 @@
   ArtField* const dex_file_field =
       soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile);
   ObjPtr<mirror::Object> dex_path_list =
-      soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList)->
+      soa.DecodeField(WellKnownClasses::dalvik_system_BaseDexClassLoader_pathList)->
       GetObject(class_loader.Get());
   if (dex_path_list != nullptr && dex_file_field != nullptr && cookie_field != nullptr) {
     // DexPathList has an array dexElements of Elements[] which each contain a dex file.
@@ -2485,14 +2503,14 @@
   } else {
     ScopedObjectAccessUnchecked soa(self);
     ObjPtr<mirror::Class> cp_klass;
-    if (FindClassInPathClassLoader(soa, self, descriptor, hash, class_loader, &cp_klass)) {
+    if (FindClassInBaseDexClassLoader(soa, self, descriptor, hash, class_loader, &cp_klass)) {
       // The chain was understood. So the value in cp_klass is either the class we were looking
       // for, or not found.
       if (cp_klass != nullptr) {
         return cp_klass.Ptr();
       }
-      // TODO: We handle the boot classpath loader in FindClassInPathClassLoader. Try to unify this
-      //       and the branch above. TODO: throw the right exception here.
+      // TODO: We handle the boot classpath loader in FindClassInBaseDexClassLoader. Try to unify
+      //       this and the branch above. TODO: throw the right exception here.
 
       // We'll let the Java-side rediscover all this and throw the exception with the right stack
       // trace.
@@ -8050,6 +8068,7 @@
     "Ljava/lang/Throwable;",
     "Ljava/lang/ClassNotFoundException;",
     "Ljava/lang/StackTraceElement;",
+    "Ldalvik/system/EmulatedStackFrame;",
     "Z",
     "B",
     "C",
@@ -8156,7 +8175,7 @@
   DCHECK(h_path_class_loader.Get() != nullptr);
   // Set DexPathList.
   ArtField* path_list_field =
-      soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList);
+      soa.DecodeField(WellKnownClasses::dalvik_system_BaseDexClassLoader_pathList);
   DCHECK(path_list_field != nullptr);
   path_list_field->SetObject<false>(h_path_class_loader.Get(), h_dex_path_list.Get());
 
diff --git a/runtime/class_linker.h b/runtime/class_linker.h
index e99dfe3..4426056 100644
--- a/runtime/class_linker.h
+++ b/runtime/class_linker.h
@@ -109,6 +109,7 @@
     kJavaLangThrowable,
     kJavaLangClassNotFoundException,
     kJavaLangStackTraceElement,
+    kDalvikSystemEmulatedStackFrame,
     kPrimitiveBoolean,
     kPrimitiveByte,
     kPrimitiveChar,
@@ -793,17 +794,17 @@
 
   void FixupStaticTrampolines(ObjPtr<mirror::Class> klass) REQUIRES_SHARED(Locks::mutator_lock_);
 
-  // Finds a class in the path class loader, loading it if necessary without using JNI. Hash
+  // Finds a class in a Path- or DexClassLoader, loading it if necessary without using JNI. Hash
   // function is supposed to be ComputeModifiedUtf8Hash(descriptor). Returns true if the
   // class-loader chain could be handled, false otherwise, i.e., a non-supported class-loader
   // was encountered while walking the parent chain (currently only BootClassLoader and
   // PathClassLoader are supported).
-  bool FindClassInPathClassLoader(ScopedObjectAccessAlreadyRunnable& soa,
-                                  Thread* self,
-                                  const char* descriptor,
-                                  size_t hash,
-                                  Handle<mirror::ClassLoader> class_loader,
-                                  ObjPtr<mirror::Class>* result)
+  bool FindClassInBaseDexClassLoader(ScopedObjectAccessAlreadyRunnable& soa,
+                                     Thread* self,
+                                     const char* descriptor,
+                                     size_t hash,
+                                     Handle<mirror::ClassLoader> class_loader,
+                                     ObjPtr<mirror::Class>* result)
       REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!dex_lock_);
 
@@ -1199,7 +1200,7 @@
   friend struct CompilationHelper;  // For Compile in ImageTest.
   friend class ImageDumper;  // for DexLock
   friend class ImageWriter;  // for GetClassRoots
-  friend class VMClassLoader;  // for LookupClass and FindClassInPathClassLoader.
+  friend class VMClassLoader;  // for LookupClass and FindClassInBaseDexClassLoader.
   friend class JniCompilerTest;  // for GetRuntimeQuickGenericJniStub
   friend class JniInternalTest;  // for GetRuntimeQuickGenericJniStub
   ART_FRIEND_TEST(ClassLinkerTest, RegisterDexFileName);  // for DexLock, and RegisterDexFileLocked
diff --git a/runtime/class_linker_test.cc b/runtime/class_linker_test.cc
index ab18627..5878bf3 100644
--- a/runtime/class_linker_test.cc
+++ b/runtime/class_linker_test.cc
@@ -31,6 +31,7 @@
 #include "mirror/accessible_object.h"
 #include "mirror/class-inl.h"
 #include "mirror/dex_cache.h"
+#include "mirror/emulated_stack_frame.h"
 #include "mirror/executable.h"
 #include "mirror/field.h"
 #include "mirror/method_type.h"
@@ -740,6 +741,15 @@
   }
 };
 
+struct EmulatedStackFrameOffsets : public CheckOffsets<mirror::EmulatedStackFrame> {
+  EmulatedStackFrameOffsets() : CheckOffsets<mirror::EmulatedStackFrame>(
+      false, "Ldalvik/system/EmulatedStackFrame;") {
+    addOffset(OFFSETOF_MEMBER(mirror::EmulatedStackFrame, references_), "references");
+    addOffset(OFFSETOF_MEMBER(mirror::EmulatedStackFrame, stack_frame_), "stackFrame");
+    addOffset(OFFSETOF_MEMBER(mirror::EmulatedStackFrame, type_), "type");
+  }
+};
+
 // C++ fields must exactly match the fields in the Java classes. If this fails,
 // reorder the fields in the C++ class. Managed class fields are ordered by
 // ClassLinker::LinkFields.
@@ -760,6 +770,7 @@
   EXPECT_TRUE(ExecutableOffsets().Check());
   EXPECT_TRUE(MethodTypeOffsets().Check());
   EXPECT_TRUE(MethodHandleImplOffsets().Check());
+  EXPECT_TRUE(EmulatedStackFrameOffsets().Check());
 }
 
 TEST_F(ClassLinkerTest, FindClassNonexistent) {
diff --git a/runtime/common_runtime_test.cc b/runtime/common_runtime_test.cc
index 5409fcb..3409938 100644
--- a/runtime/common_runtime_test.cc
+++ b/runtime/common_runtime_test.cc
@@ -524,7 +524,7 @@
   ArtField* dex_file_field =
       soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile);
   ObjPtr<mirror::Object> dex_path_list =
-      soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList)->
+      soa.DecodeField(WellKnownClasses::dalvik_system_BaseDexClassLoader_pathList)->
       GetObject(class_loader.Get());
   if (dex_path_list != nullptr && dex_file_field!= nullptr && cookie_field != nullptr) {
     // DexPathList has an array dexElements of Elements[] which each contain a dex file.
@@ -572,6 +572,29 @@
   return ret;
 }
 
+jobject CommonRuntimeTestImpl::LoadMultiDex(const char* first_dex_name,
+                                            const char* second_dex_name) {
+  std::vector<std::unique_ptr<const DexFile>> first_dex_files = OpenTestDexFiles(first_dex_name);
+  std::vector<std::unique_ptr<const DexFile>> second_dex_files = OpenTestDexFiles(second_dex_name);
+  std::vector<const DexFile*> class_path;
+  CHECK_NE(0U, first_dex_files.size());
+  CHECK_NE(0U, second_dex_files.size());
+  for (auto& dex_file : first_dex_files) {
+    class_path.push_back(dex_file.get());
+    loaded_dex_files_.push_back(std::move(dex_file));
+  }
+  for (auto& dex_file : second_dex_files) {
+    class_path.push_back(dex_file.get());
+    loaded_dex_files_.push_back(std::move(dex_file));
+  }
+
+  Thread* self = Thread::Current();
+  jobject class_loader = Runtime::Current()->GetClassLinker()->CreatePathClassLoader(self,
+                                                                                     class_path);
+  self->SetClassLoaderOverride(class_loader);
+  return class_loader;
+}
+
 jobject CommonRuntimeTestImpl::LoadDex(const char* dex_name) {
   std::vector<std::unique_ptr<const DexFile>> dex_files = OpenTestDexFiles(dex_name);
   std::vector<const DexFile*> class_path;
diff --git a/runtime/common_runtime_test.h b/runtime/common_runtime_test.h
index 92934c6..827e85e 100644
--- a/runtime/common_runtime_test.h
+++ b/runtime/common_runtime_test.h
@@ -133,6 +133,8 @@
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   jobject LoadDex(const char* dex_name) REQUIRES_SHARED(Locks::mutator_lock_);
+  jobject LoadMultiDex(const char* first_dex_name, const char* second_dex_name)
+      REQUIRES_SHARED(Locks::mutator_lock_);
 
   std::string android_data_;
   std::string dalvik_cache_;
diff --git a/runtime/common_throws.cc b/runtime/common_throws.cc
index 0251776..9f0dbbb 100644
--- a/runtime/common_throws.cc
+++ b/runtime/common_throws.cc
@@ -813,13 +813,11 @@
 
 void ThrowWrongMethodTypeException(mirror::MethodType* callee_type,
                                    mirror::MethodType* callsite_type) {
-  // TODO(narayan): Should we provide more detail here ? The RI doesn't bother.
-  UNUSED(callee_type);
-  UNUSED(callsite_type);
-
   ThrowException("Ljava/lang/invoke/WrongMethodTypeException;",
                  nullptr,
-                 "Invalid method type for signature polymorphic call");
+                 StringPrintf("Expected %s but was %s",
+                              callee_type->PrettyDescriptor().c_str(),
+                              callsite_type->PrettyDescriptor().c_str()).c_str());
 }
 
 }  // namespace art
diff --git a/runtime/generated/asm_support_gen.h b/runtime/generated/asm_support_gen.h
index 03f5bf6..6c189b0 100644
--- a/runtime/generated/asm_support_gen.h
+++ b/runtime/generated/asm_support_gen.h
@@ -52,6 +52,8 @@
 DEFINE_CHECK_EQ(static_cast<uint32_t>(MIRROR_CLASS_STATUS_INITIALIZED), (static_cast<uint32_t>((art::mirror::Class::kStatusInitialized))))
 #define ACCESS_FLAGS_CLASS_IS_FINALIZABLE 0x80000000
 DEFINE_CHECK_EQ(static_cast<uint32_t>(ACCESS_FLAGS_CLASS_IS_FINALIZABLE), (static_cast<uint32_t>((art::kAccClassIsFinalizable))))
+#define ACCESS_FLAGS_CLASS_IS_INTERFACE 0x200
+DEFINE_CHECK_EQ(static_cast<uint32_t>(ACCESS_FLAGS_CLASS_IS_INTERFACE), (static_cast<uint32_t>((art::kAccInterface))))
 #define ACCESS_FLAGS_CLASS_IS_FINALIZABLE_BIT 0x1f
 DEFINE_CHECK_EQ(static_cast<uint32_t>(ACCESS_FLAGS_CLASS_IS_FINALIZABLE_BIT), (static_cast<uint32_t>((art::MostSignificantBit(art::kAccClassIsFinalizable)))))
 #define ART_METHOD_DEX_CACHE_METHODS_OFFSET_32 20
diff --git a/runtime/intern_table.cc b/runtime/intern_table.cc
index a61a187..7b75109 100644
--- a/runtime/intern_table.cc
+++ b/runtime/intern_table.cc
@@ -63,9 +63,9 @@
     strong_interns_.VisitRoots(visitor);
   } else if ((flags & kVisitRootFlagNewRoots) != 0) {
     for (auto& root : new_strong_intern_roots_) {
-      mirror::String* old_ref = root.Read<kWithoutReadBarrier>();
+      ObjPtr<mirror::String> old_ref = root.Read<kWithoutReadBarrier>();
       root.VisitRoot(visitor, RootInfo(kRootInternedString));
-      mirror::String* new_ref = root.Read<kWithoutReadBarrier>();
+      ObjPtr<mirror::String> new_ref = root.Read<kWithoutReadBarrier>();
       if (new_ref != old_ref) {
         // The GC moved a root in the log. Need to search the strong interns and update the
         // corresponding object. This is slow, but luckily for us, this may only happen with a
@@ -86,17 +86,17 @@
   // Note: we deliberately don't visit the weak_interns_ table and the immutable image roots.
 }
 
-mirror::String* InternTable::LookupWeak(Thread* self, mirror::String* s) {
+ObjPtr<mirror::String> InternTable::LookupWeak(Thread* self, ObjPtr<mirror::String> s) {
   MutexLock mu(self, *Locks::intern_table_lock_);
   return LookupWeakLocked(s);
 }
 
-mirror::String* InternTable::LookupStrong(Thread* self, mirror::String* s) {
+ObjPtr<mirror::String> InternTable::LookupStrong(Thread* self, ObjPtr<mirror::String> s) {
   MutexLock mu(self, *Locks::intern_table_lock_);
   return LookupStrongLocked(s);
 }
 
-mirror::String* InternTable::LookupStrong(Thread* self,
+ObjPtr<mirror::String> InternTable::LookupStrong(Thread* self,
                                           uint32_t utf16_length,
                                           const char* utf8_data) {
   DCHECK_EQ(utf16_length, CountModifiedUtf8Chars(utf8_data));
@@ -107,11 +107,11 @@
   return strong_interns_.Find(string);
 }
 
-mirror::String* InternTable::LookupWeakLocked(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::LookupWeakLocked(ObjPtr<mirror::String> s) {
   return weak_interns_.Find(s);
 }
 
-mirror::String* InternTable::LookupStrongLocked(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::LookupStrongLocked(ObjPtr<mirror::String> s) {
   return strong_interns_.Find(s);
 }
 
@@ -121,7 +121,7 @@
   strong_interns_.AddNewTable();
 }
 
-mirror::String* InternTable::InsertStrong(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::InsertStrong(ObjPtr<mirror::String> s) {
   Runtime* runtime = Runtime::Current();
   if (runtime->IsActiveTransaction()) {
     runtime->RecordStrongStringInsertion(s);
@@ -133,7 +133,7 @@
   return s;
 }
 
-mirror::String* InternTable::InsertWeak(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::InsertWeak(ObjPtr<mirror::String> s) {
   Runtime* runtime = Runtime::Current();
   if (runtime->IsActiveTransaction()) {
     runtime->RecordWeakStringInsertion(s);
@@ -142,11 +142,11 @@
   return s;
 }
 
-void InternTable::RemoveStrong(mirror::String* s) {
+void InternTable::RemoveStrong(ObjPtr<mirror::String> s) {
   strong_interns_.Remove(s);
 }
 
-void InternTable::RemoveWeak(mirror::String* s) {
+void InternTable::RemoveWeak(ObjPtr<mirror::String> s) {
   Runtime* runtime = Runtime::Current();
   if (runtime->IsActiveTransaction()) {
     runtime->RecordWeakStringRemoval(s);
@@ -155,19 +155,22 @@
 }
 
 // Insert/remove methods used to undo changes made during an aborted transaction.
-mirror::String* InternTable::InsertStrongFromTransaction(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::InsertStrongFromTransaction(ObjPtr<mirror::String> s) {
   DCHECK(!Runtime::Current()->IsActiveTransaction());
   return InsertStrong(s);
 }
-mirror::String* InternTable::InsertWeakFromTransaction(mirror::String* s) {
+
+ObjPtr<mirror::String> InternTable::InsertWeakFromTransaction(ObjPtr<mirror::String> s) {
   DCHECK(!Runtime::Current()->IsActiveTransaction());
   return InsertWeak(s);
 }
-void InternTable::RemoveStrongFromTransaction(mirror::String* s) {
+
+void InternTable::RemoveStrongFromTransaction(ObjPtr<mirror::String> s) {
   DCHECK(!Runtime::Current()->IsActiveTransaction());
   RemoveStrong(s);
 }
-void InternTable::RemoveWeakFromTransaction(mirror::String* s) {
+
+void InternTable::RemoveWeakFromTransaction(ObjPtr<mirror::String> s) {
   DCHECK(!Runtime::Current()->IsActiveTransaction());
   RemoveWeak(s);
 }
@@ -203,7 +206,9 @@
   Locks::intern_table_lock_->ExclusiveLock(self);
 }
 
-mirror::String* InternTable::Insert(mirror::String* s, bool is_strong, bool holding_locks) {
+ObjPtr<mirror::String> InternTable::Insert(ObjPtr<mirror::String> s,
+                                           bool is_strong,
+                                           bool holding_locks) {
   if (s == nullptr) {
     return nullptr;
   }
@@ -222,7 +227,7 @@
       }
     }
     // Check the strong table for a match.
-    mirror::String* strong = LookupStrongLocked(s);
+    ObjPtr<mirror::String> strong = LookupStrongLocked(s);
     if (strong != nullptr) {
       return strong;
     }
@@ -244,7 +249,7 @@
     CHECK(self->GetWeakRefAccessEnabled());
   }
   // There is no match in the strong table, check the weak table.
-  mirror::String* weak = LookupWeakLocked(s);
+  ObjPtr<mirror::String> weak = LookupWeakLocked(s);
   if (weak != nullptr) {
     if (is_strong) {
       // A match was found in the weak table. Promote to the strong table.
@@ -257,11 +262,11 @@
   return is_strong ? InsertStrong(s) : InsertWeak(s);
 }
 
-mirror::String* InternTable::InternStrong(int32_t utf16_length, const char* utf8_data) {
+ObjPtr<mirror::String> InternTable::InternStrong(int32_t utf16_length, const char* utf8_data) {
   DCHECK(utf8_data != nullptr);
   Thread* self = Thread::Current();
   // Try to avoid allocation.
-  mirror::String* s = LookupStrong(self, utf16_length, utf8_data);
+  ObjPtr<mirror::String> s = LookupStrong(self, utf16_length, utf8_data);
   if (s != nullptr) {
     return s;
   }
@@ -269,25 +274,25 @@
       self, utf16_length, utf8_data));
 }
 
-mirror::String* InternTable::InternStrong(const char* utf8_data) {
+ObjPtr<mirror::String> InternTable::InternStrong(const char* utf8_data) {
   DCHECK(utf8_data != nullptr);
   return InternStrong(mirror::String::AllocFromModifiedUtf8(Thread::Current(), utf8_data));
 }
 
-mirror::String* InternTable::InternStrongImageString(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::InternStrongImageString(ObjPtr<mirror::String> s) {
   // May be holding the heap bitmap lock.
   return Insert(s, true, true);
 }
 
-mirror::String* InternTable::InternStrong(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::InternStrong(ObjPtr<mirror::String> s) {
   return Insert(s, true, false);
 }
 
-mirror::String* InternTable::InternWeak(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::InternWeak(ObjPtr<mirror::String> s) {
   return Insert(s, false, false);
 }
 
-bool InternTable::ContainsWeak(mirror::String* s) {
+bool InternTable::ContainsWeak(ObjPtr<mirror::String> s) {
   return LookupWeak(Thread::Current(), s) == s;
 }
 
@@ -314,7 +319,7 @@
   if (kIsDebugBuild) {
     Locks::mutator_lock_->AssertSharedHeld(Thread::Current());
   }
-  return static_cast<size_t>(root.Read()->GetHashCode());
+  return static_cast<size_t>(root.Read<kWithoutReadBarrier>()->GetHashCode());
 }
 
 bool InternTable::StringHashEquals::operator()(const GcRoot<mirror::String>& a,
@@ -322,7 +327,7 @@
   if (kIsDebugBuild) {
     Locks::mutator_lock_->AssertSharedHeld(Thread::Current());
   }
-  return a.Read()->Equals(b.Read());
+  return a.Read<kWithoutReadBarrier>()->Equals(b.Read<kWithoutReadBarrier>());
 }
 
 bool InternTable::StringHashEquals::operator()(const GcRoot<mirror::String>& a,
@@ -330,7 +335,7 @@
   if (kIsDebugBuild) {
     Locks::mutator_lock_->AssertSharedHeld(Thread::Current());
   }
-  mirror::String* a_string = a.Read();
+  ObjPtr<mirror::String> a_string = a.Read<kWithoutReadBarrier>();
   uint32_t a_length = static_cast<uint32_t>(a_string->GetLength());
   if (a_length != b.GetUtf16Length()) {
     return false;
@@ -392,7 +397,7 @@
   return table_to_write->WriteToMemory(ptr);
 }
 
-void InternTable::Table::Remove(mirror::String* s) {
+void InternTable::Table::Remove(ObjPtr<mirror::String> s) {
   for (UnorderedSet& table : tables_) {
     auto it = table.Find(GcRoot<mirror::String>(s));
     if (it != table.end()) {
@@ -403,7 +408,7 @@
   LOG(FATAL) << "Attempting to remove non-interned string " << s->ToModifiedUtf8();
 }
 
-mirror::String* InternTable::Table::Find(mirror::String* s) {
+ObjPtr<mirror::String> InternTable::Table::Find(ObjPtr<mirror::String> s) {
   Locks::intern_table_lock_->AssertHeld(Thread::Current());
   for (UnorderedSet& table : tables_) {
     auto it = table.Find(GcRoot<mirror::String>(s));
@@ -414,7 +419,7 @@
   return nullptr;
 }
 
-mirror::String* InternTable::Table::Find(const Utf8String& string) {
+ObjPtr<mirror::String> InternTable::Table::Find(const Utf8String& string) {
   Locks::intern_table_lock_->AssertHeld(Thread::Current());
   for (UnorderedSet& table : tables_) {
     auto it = table.Find(string);
@@ -429,7 +434,7 @@
   tables_.push_back(UnorderedSet());
 }
 
-void InternTable::Table::Insert(mirror::String* s) {
+void InternTable::Table::Insert(ObjPtr<mirror::String> s) {
   // Always insert the last table, the image tables are before and we avoid inserting into these
   // to prevent dirty pages.
   DCHECK(!tables_.empty());
diff --git a/runtime/intern_table.h b/runtime/intern_table.h
index 30ff55d..acb2067 100644
--- a/runtime/intern_table.h
+++ b/runtime/intern_table.h
@@ -57,43 +57,44 @@
   InternTable();
 
   // Interns a potentially new string in the 'strong' table. May cause thread suspension.
-  mirror::String* InternStrong(int32_t utf16_length, const char* utf8_data)
+  ObjPtr<mirror::String> InternStrong(int32_t utf16_length, const char* utf8_data)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
 
   // Only used by image writer. Special version that may not cause thread suspension since the GC
   // cannot be running while we are doing image writing. Maybe be called while while holding a
   // lock since there will not be thread suspension.
-  mirror::String* InternStrongImageString(mirror::String* s)
+  ObjPtr<mirror::String> InternStrongImageString(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   // Interns a potentially new string in the 'strong' table. May cause thread suspension.
-  mirror::String* InternStrong(const char* utf8_data) REQUIRES_SHARED(Locks::mutator_lock_)
+  ObjPtr<mirror::String> InternStrong(const char* utf8_data) REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!Roles::uninterruptible_);
 
   // Interns a potentially new string in the 'strong' table. May cause thread suspension.
-  mirror::String* InternStrong(mirror::String* s) REQUIRES_SHARED(Locks::mutator_lock_)
+  ObjPtr<mirror::String> InternStrong(ObjPtr<mirror::String> s)
+      REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!Roles::uninterruptible_);
 
   // Interns a potentially new string in the 'weak' table. May cause thread suspension.
-  mirror::String* InternWeak(mirror::String* s) REQUIRES_SHARED(Locks::mutator_lock_)
+  ObjPtr<mirror::String> InternWeak(ObjPtr<mirror::String> s) REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!Roles::uninterruptible_);
 
   void SweepInternTableWeaks(IsMarkedVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!Locks::intern_table_lock_);
 
-  bool ContainsWeak(mirror::String* s) REQUIRES_SHARED(Locks::mutator_lock_)
+  bool ContainsWeak(ObjPtr<mirror::String> s) REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!Locks::intern_table_lock_);
 
   // Lookup a strong intern, returns null if not found.
-  mirror::String* LookupStrong(Thread* self, mirror::String* s)
+  ObjPtr<mirror::String> LookupStrong(Thread* self, ObjPtr<mirror::String> s)
       REQUIRES(!Locks::intern_table_lock_)
       REQUIRES_SHARED(Locks::mutator_lock_);
-  mirror::String* LookupStrong(Thread* self, uint32_t utf16_length, const char* utf8_data)
+  ObjPtr<mirror::String> LookupStrong(Thread* self, uint32_t utf16_length, const char* utf8_data)
       REQUIRES(!Locks::intern_table_lock_)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   // Lookup a weak intern, returns null if not found.
-  mirror::String* LookupWeak(Thread* self, mirror::String* s)
+  ObjPtr<mirror::String> LookupWeak(Thread* self, ObjPtr<mirror::String> s)
       REQUIRES(!Locks::intern_table_lock_)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
@@ -181,13 +182,13 @@
   class Table {
    public:
     Table();
-    mirror::String* Find(mirror::String* s) REQUIRES_SHARED(Locks::mutator_lock_)
+    ObjPtr<mirror::String> Find(ObjPtr<mirror::String> s) REQUIRES_SHARED(Locks::mutator_lock_)
         REQUIRES(Locks::intern_table_lock_);
-    mirror::String* Find(const Utf8String& string) REQUIRES_SHARED(Locks::mutator_lock_)
+    ObjPtr<mirror::String> Find(const Utf8String& string) REQUIRES_SHARED(Locks::mutator_lock_)
         REQUIRES(Locks::intern_table_lock_);
-    void Insert(mirror::String* s) REQUIRES_SHARED(Locks::mutator_lock_)
+    void Insert(ObjPtr<mirror::String> s) REQUIRES_SHARED(Locks::mutator_lock_)
         REQUIRES(Locks::intern_table_lock_);
-    void Remove(mirror::String* s)
+    void Remove(ObjPtr<mirror::String> s)
         REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
     void VisitRoots(RootVisitor* visitor)
         REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
@@ -221,30 +222,30 @@
   // Insert if non null, otherwise return null. Must be called holding the mutator lock.
   // If holding_locks is true, then we may also hold other locks. If holding_locks is true, then we
   // require GC is not running since it is not safe to wait while holding locks.
-  mirror::String* Insert(mirror::String* s, bool is_strong, bool holding_locks)
+  ObjPtr<mirror::String> Insert(ObjPtr<mirror::String> s, bool is_strong, bool holding_locks)
       REQUIRES(!Locks::intern_table_lock_) REQUIRES_SHARED(Locks::mutator_lock_);
 
-  mirror::String* LookupStrongLocked(mirror::String* s)
+  ObjPtr<mirror::String> LookupStrongLocked(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
-  mirror::String* LookupWeakLocked(mirror::String* s)
+  ObjPtr<mirror::String> LookupWeakLocked(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
-  mirror::String* InsertStrong(mirror::String* s)
+  ObjPtr<mirror::String> InsertStrong(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
-  mirror::String* InsertWeak(mirror::String* s)
+  ObjPtr<mirror::String> InsertWeak(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
-  void RemoveStrong(mirror::String* s)
+  void RemoveStrong(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
-  void RemoveWeak(mirror::String* s)
+  void RemoveWeak(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
 
   // Transaction rollback access.
-  mirror::String* InsertStrongFromTransaction(mirror::String* s)
+  ObjPtr<mirror::String> InsertStrongFromTransaction(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
-  mirror::String* InsertWeakFromTransaction(mirror::String* s)
+  ObjPtr<mirror::String> InsertWeakFromTransaction(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
-  void RemoveStrongFromTransaction(mirror::String* s)
+  void RemoveStrongFromTransaction(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
-  void RemoveWeakFromTransaction(mirror::String* s)
+  void RemoveWeakFromTransaction(ObjPtr<mirror::String> s)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::intern_table_lock_);
 
   size_t AddTableFromMemoryLocked(const uint8_t* ptr)
diff --git a/runtime/intern_table_test.cc b/runtime/intern_table_test.cc
index 74cec57..b91d946 100644
--- a/runtime/intern_table_test.cc
+++ b/runtime/intern_table_test.cc
@@ -193,22 +193,22 @@
   ASSERT_NE(foo.Get(), bar.Get());
   ASSERT_NE(foo.Get(), foobar.Get());
   ASSERT_NE(bar.Get(), foobar.Get());
-  mirror::String* lookup_foo = intern_table.LookupStrong(soa.Self(), 3, "foo");
-  EXPECT_EQ(lookup_foo, foo.Get());
-  mirror::String* lookup_bar = intern_table.LookupStrong(soa.Self(), 3, "bar");
-  EXPECT_EQ(lookup_bar, bar.Get());
-  mirror::String* lookup_foobar = intern_table.LookupStrong(soa.Self(), 6, "foobar");
-  EXPECT_EQ(lookup_foobar, foobar.Get());
-  mirror::String* lookup_foox = intern_table.LookupStrong(soa.Self(), 4, "foox");
+  ObjPtr<mirror::String> lookup_foo = intern_table.LookupStrong(soa.Self(), 3, "foo");
+  EXPECT_OBJ_PTR_EQ(lookup_foo, foo.Get());
+  ObjPtr<mirror::String> lookup_bar = intern_table.LookupStrong(soa.Self(), 3, "bar");
+  EXPECT_OBJ_PTR_EQ(lookup_bar, bar.Get());
+  ObjPtr<mirror::String> lookup_foobar = intern_table.LookupStrong(soa.Self(), 6, "foobar");
+  EXPECT_OBJ_PTR_EQ(lookup_foobar, foobar.Get());
+  ObjPtr<mirror::String> lookup_foox = intern_table.LookupStrong(soa.Self(), 4, "foox");
   EXPECT_TRUE(lookup_foox == nullptr);
-  mirror::String* lookup_fooba = intern_table.LookupStrong(soa.Self(), 5, "fooba");
+  ObjPtr<mirror::String> lookup_fooba = intern_table.LookupStrong(soa.Self(), 5, "fooba");
   EXPECT_TRUE(lookup_fooba == nullptr);
-  mirror::String* lookup_foobaR = intern_table.LookupStrong(soa.Self(), 6, "foobaR");
+  ObjPtr<mirror::String> lookup_foobaR = intern_table.LookupStrong(soa.Self(), 6, "foobaR");
   EXPECT_TRUE(lookup_foobaR == nullptr);
   // Try a hash conflict.
   ASSERT_EQ(ComputeUtf16HashFromModifiedUtf8("foobar", 6),
             ComputeUtf16HashFromModifiedUtf8("foobbS", 6));
-  mirror::String* lookup_foobbS = intern_table.LookupStrong(soa.Self(), 6, "foobbS");
+  ObjPtr<mirror::String> lookup_foobbS = intern_table.LookupStrong(soa.Self(), 6, "foobbS");
   EXPECT_TRUE(lookup_foobbS == nullptr);
 }
 
diff --git a/runtime/interpreter/interpreter_common.cc b/runtime/interpreter/interpreter_common.cc
index 1ed3d55..4fc92a3 100644
--- a/runtime/interpreter/interpreter_common.cc
+++ b/runtime/interpreter/interpreter_common.cc
@@ -27,6 +27,7 @@
 #include "method_handles-inl.h"
 #include "mirror/array-inl.h"
 #include "mirror/class.h"
+#include "mirror/emulated_stack_frame.h"
 #include "mirror/method_handle_impl.h"
 #include "reflection.h"
 #include "reflection-inl.h"
@@ -42,6 +43,59 @@
   ThrowNullPointerExceptionFromDexPC();
 }
 
+template<Primitive::Type field_type>
+static ALWAYS_INLINE void DoFieldGetCommon(Thread* self,
+                                           const ShadowFrame& shadow_frame,
+                                           ObjPtr<mirror::Object>& obj,
+                                           ArtField* field,
+                                           JValue* result) REQUIRES_SHARED(Locks::mutator_lock_) {
+  field->GetDeclaringClass()->AssertInitializedOrInitializingInThread(self);
+
+  // Report this field access to instrumentation if needed.
+  instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
+  if (UNLIKELY(instrumentation->HasFieldReadListeners())) {
+    StackHandleScope<1> hs(self);
+    // Wrap in handle wrapper in case the listener does thread suspension.
+    HandleWrapperObjPtr<mirror::Object> h(hs.NewHandleWrapper(&obj));
+    ObjPtr<mirror::Object> this_object;
+    if (!field->IsStatic()) {
+      this_object = obj;
+    }
+    instrumentation->FieldReadEvent(self,
+                                    this_object.Ptr(),
+                                    shadow_frame.GetMethod(),
+                                    shadow_frame.GetDexPC(),
+                                    field);
+  }
+
+  switch (field_type) {
+    case Primitive::kPrimBoolean:
+      result->SetZ(field->GetBoolean(obj));
+      break;
+    case Primitive::kPrimByte:
+      result->SetB(field->GetByte(obj));
+      break;
+    case Primitive::kPrimChar:
+      result->SetC(field->GetChar(obj));
+      break;
+    case Primitive::kPrimShort:
+      result->SetS(field->GetShort(obj));
+      break;
+    case Primitive::kPrimInt:
+      result->SetI(field->GetInt(obj));
+      break;
+    case Primitive::kPrimLong:
+      result->SetJ(field->GetLong(obj));
+      break;
+    case Primitive::kPrimNot:
+      result->SetL(field->GetObject(obj));
+      break;
+    default:
+      LOG(FATAL) << "Unreachable: " << field_type;
+      UNREACHABLE();
+  }
+}
+
 template<FindFieldType find_type, Primitive::Type field_type, bool do_access_check>
 bool DoFieldGet(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst,
                 uint16_t inst_data) {
@@ -64,45 +118,31 @@
       return false;
     }
   }
-  f->GetDeclaringClass()->AssertInitializedOrInitializingInThread(self);
-  // Report this field access to instrumentation if needed.
-  instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
-  if (UNLIKELY(instrumentation->HasFieldReadListeners())) {
-    StackHandleScope<1> hs(self);
-    // Wrap in handle wrapper in case the listener does thread suspension.
-    HandleWrapperObjPtr<mirror::Object> h(hs.NewHandleWrapper(&obj));
-    ObjPtr<mirror::Object> this_object;
-    if (!f->IsStatic()) {
-      this_object = obj;
-    }
-    instrumentation->FieldReadEvent(self,
-                                    this_object.Ptr(),
-                                    shadow_frame.GetMethod(),
-                                    shadow_frame.GetDexPC(),
-                                    f);
-  }
+
+  JValue result;
+  DoFieldGetCommon<field_type>(self, shadow_frame, obj, f, &result);
   uint32_t vregA = is_static ? inst->VRegA_21c(inst_data) : inst->VRegA_22c(inst_data);
   switch (field_type) {
     case Primitive::kPrimBoolean:
-      shadow_frame.SetVReg(vregA, f->GetBoolean(obj));
+      shadow_frame.SetVReg(vregA, result.GetZ());
       break;
     case Primitive::kPrimByte:
-      shadow_frame.SetVReg(vregA, f->GetByte(obj));
+      shadow_frame.SetVReg(vregA, result.GetB());
       break;
     case Primitive::kPrimChar:
-      shadow_frame.SetVReg(vregA, f->GetChar(obj));
+      shadow_frame.SetVReg(vregA, result.GetC());
       break;
     case Primitive::kPrimShort:
-      shadow_frame.SetVReg(vregA, f->GetShort(obj));
+      shadow_frame.SetVReg(vregA, result.GetS());
       break;
     case Primitive::kPrimInt:
-      shadow_frame.SetVReg(vregA, f->GetInt(obj));
+      shadow_frame.SetVReg(vregA, result.GetI());
       break;
     case Primitive::kPrimLong:
-      shadow_frame.SetVRegLong(vregA, f->GetLong(obj));
+      shadow_frame.SetVRegLong(vregA, result.GetJ());
       break;
     case Primitive::kPrimNot:
-      shadow_frame.SetVRegReference(vregA, f->GetObject(obj).Ptr());
+      shadow_frame.SetVRegReference(vregA, result.GetL());
       break;
     default:
       LOG(FATAL) << "Unreachable: " << field_type;
@@ -143,6 +183,48 @@
 #undef EXPLICIT_DO_FIELD_GET_ALL_TEMPLATE_DECL
 #undef EXPLICIT_DO_FIELD_GET_TEMPLATE_DECL
 
+// Helper for getters in invoke-polymorphic.
+inline static void DoFieldGetForInvokePolymorphic(Thread* self,
+                                                  const ShadowFrame& shadow_frame,
+                                                  ObjPtr<mirror::Object>& obj,
+                                                  ArtField* field,
+                                                  Primitive::Type field_type,
+                                                  JValue* result)
+    REQUIRES_SHARED(Locks::mutator_lock_) {
+  switch (field_type) {
+    case Primitive::kPrimBoolean:
+      DoFieldGetCommon<Primitive::kPrimBoolean>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimByte:
+      DoFieldGetCommon<Primitive::kPrimByte>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimChar:
+      DoFieldGetCommon<Primitive::kPrimChar>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimShort:
+      DoFieldGetCommon<Primitive::kPrimShort>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimInt:
+      DoFieldGetCommon<Primitive::kPrimInt>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimLong:
+      DoFieldGetCommon<Primitive::kPrimLong>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimFloat:
+      DoFieldGetCommon<Primitive::kPrimInt>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimDouble:
+      DoFieldGetCommon<Primitive::kPrimLong>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimNot:
+      DoFieldGetCommon<Primitive::kPrimNot>(self, shadow_frame, obj, field, result);
+      break;
+    case Primitive::kPrimVoid:
+      LOG(FATAL) << "Unreachable: " << field_type;
+      UNREACHABLE();
+  }
+}
+
 // Handles iget-quick, iget-wide-quick and iget-object-quick instructions.
 // Returns true on success, otherwise throws an exception and returns false.
 template<Primitive::Type field_type>
@@ -250,32 +332,14 @@
   return field_value;
 }
 
-template<FindFieldType find_type, Primitive::Type field_type, bool do_access_check,
-         bool transaction_active>
-bool DoFieldPut(Thread* self, const ShadowFrame& shadow_frame, const Instruction* inst,
-                uint16_t inst_data) {
-  bool do_assignability_check = do_access_check;
-  bool is_static = (find_type == StaticObjectWrite) || (find_type == StaticPrimitiveWrite);
-  uint32_t field_idx = is_static ? inst->VRegB_21c() : inst->VRegC_22c();
-  ArtField* f =
-      FindFieldFromCode<find_type, do_access_check>(field_idx, shadow_frame.GetMethod(), self,
-                                                    Primitive::ComponentSize(field_type));
-  if (UNLIKELY(f == nullptr)) {
-    CHECK(self->IsExceptionPending());
-    return false;
-  }
-  ObjPtr<mirror::Object> obj;
-  if (is_static) {
-    obj = f->GetDeclaringClass();
-  } else {
-    obj = shadow_frame.GetVRegReference(inst->VRegB_22c(inst_data));
-    if (UNLIKELY(obj == nullptr)) {
-      ThrowNullPointerExceptionForFieldAccess(f, false);
-      return false;
-    }
-  }
+template<Primitive::Type field_type, bool do_assignability_check, bool transaction_active>
+static inline bool DoFieldPutCommon(Thread* self,
+                                    const ShadowFrame& shadow_frame,
+                                    ObjPtr<mirror::Object>& obj,
+                                    ArtField* f,
+                                    size_t vregA) REQUIRES_SHARED(Locks::mutator_lock_) {
   f->GetDeclaringClass()->AssertInitializedOrInitializingInThread(self);
-  uint32_t vregA = is_static ? inst->VRegA_21c(inst_data) : inst->VRegA_22c(inst_data);
+
   // Report this field access to instrumentation if needed. Since we only have the offset of
   // the field from the base of the object, we need to look for it first.
   instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
@@ -291,6 +355,7 @@
                                      f,
                                      field_value);
   }
+
   switch (field_type) {
     case Primitive::kPrimBoolean:
       f->SetBoolean<transaction_active>(obj, shadow_frame.GetVReg(vregA));
@@ -343,6 +408,39 @@
   return true;
 }
 
+template<FindFieldType find_type, Primitive::Type field_type, bool do_access_check,
+         bool transaction_active>
+bool DoFieldPut(Thread* self, const ShadowFrame& shadow_frame, const Instruction* inst,
+                uint16_t inst_data) {
+  const bool do_assignability_check = do_access_check;
+  bool is_static = (find_type == StaticObjectWrite) || (find_type == StaticPrimitiveWrite);
+  uint32_t field_idx = is_static ? inst->VRegB_21c() : inst->VRegC_22c();
+  ArtField* f =
+      FindFieldFromCode<find_type, do_access_check>(field_idx, shadow_frame.GetMethod(), self,
+                                                    Primitive::ComponentSize(field_type));
+  if (UNLIKELY(f == nullptr)) {
+    CHECK(self->IsExceptionPending());
+    return false;
+  }
+  ObjPtr<mirror::Object> obj;
+  if (is_static) {
+    obj = f->GetDeclaringClass();
+  } else {
+    obj = shadow_frame.GetVRegReference(inst->VRegB_22c(inst_data));
+    if (UNLIKELY(obj == nullptr)) {
+      ThrowNullPointerExceptionForFieldAccess(f, false);
+      return false;
+    }
+  }
+
+  uint32_t vregA = is_static ? inst->VRegA_21c(inst_data) : inst->VRegA_22c(inst_data);
+  return DoFieldPutCommon<field_type, do_assignability_check, transaction_active>(self,
+                                                                                  shadow_frame,
+                                                                                  obj,
+                                                                                  f,
+                                                                                  vregA);
+}
+
 // Explicitly instantiate all DoFieldPut functions.
 #define EXPLICIT_DO_FIELD_PUT_TEMPLATE_DECL(_find_type, _field_type, _do_check, _transaction_active) \
   template bool DoFieldPut<_find_type, _field_type, _do_check, _transaction_active>(Thread* self, \
@@ -375,6 +473,49 @@
 #undef EXPLICIT_DO_FIELD_PUT_ALL_TEMPLATE_DECL
 #undef EXPLICIT_DO_FIELD_PUT_TEMPLATE_DECL
 
+// Helper for setters in invoke-polymorphic.
+bool DoFieldPutForInvokePolymorphic(Thread* self,
+                                    ShadowFrame& shadow_frame,
+                                    ObjPtr<mirror::Object>& obj,
+                                    ArtField* field,
+                                    Primitive::Type field_type,
+                                    size_t vregA) REQUIRES_SHARED(Locks::mutator_lock_) {
+  static const bool kDoCheckAssignability = false;
+  static const bool kTransaction = false;
+  switch (field_type) {
+    case Primitive::kPrimBoolean:
+      return DoFieldPutCommon<Primitive::kPrimBoolean, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimByte:
+      return DoFieldPutCommon<Primitive::kPrimByte, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimChar:
+      return DoFieldPutCommon<Primitive::kPrimChar, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimShort:
+      return DoFieldPutCommon<Primitive::kPrimShort, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimInt:
+      return DoFieldPutCommon<Primitive::kPrimInt, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimLong:
+      return DoFieldPutCommon<Primitive::kPrimLong, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimFloat:
+      return DoFieldPutCommon<Primitive::kPrimInt, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimDouble:
+      return DoFieldPutCommon<Primitive::kPrimLong, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimNot:
+      return DoFieldPutCommon<Primitive::kPrimNot, kDoCheckAssignability, kTransaction>(
+          self, shadow_frame, obj, field, vregA);
+    case Primitive::kPrimVoid:
+      LOG(FATAL) << "Unreachable: " << field_type;
+      UNREACHABLE();
+  }
+}
+
 template<Primitive::Type field_type, bool transaction_active>
 bool DoIPutQuick(const ShadowFrame& shadow_frame, const Instruction* inst, uint16_t inst_data) {
   ObjPtr<mirror::Object> obj = shadow_frame.GetVRegReference(inst->VRegB_22c(inst_data));
@@ -529,15 +670,19 @@
                                      ShadowFrame& shadow_frame,
                                      JValue* result,
                                      uint32_t (&arg)[Instruction::kMaxVarArgRegs],
-                                     uint32_t vregC) ALWAYS_INLINE;
+                                     uint32_t vregC,
+                                     const MethodHandleKind handle_kind) ALWAYS_INLINE;
 
-REQUIRES_SHARED(Locks::mutator_lock_)
+template <bool is_range> REQUIRES_SHARED(Locks::mutator_lock_)
 static inline bool DoCallTransform(ArtMethod* called_method,
                                    Handle<mirror::MethodType> callsite_type,
+                                   Handle<mirror::MethodType> callee_type,
                                    Thread* self,
                                    ShadowFrame& shadow_frame,
                                    Handle<mirror::MethodHandleImpl> receiver,
-                                   JValue* result) ALWAYS_INLINE;
+                                   JValue* result,
+                                   uint32_t (&arg)[Instruction::kMaxVarArgRegs],
+                                   uint32_t vregC) ALWAYS_INLINE;
 
 REQUIRES_SHARED(Locks::mutator_lock_)
 inline void PerformCall(Thread* self,
@@ -620,6 +765,17 @@
   }
 }
 
+inline static bool IsInvokeExact(const DexFile& dex_file, int invoke_method_idx) {
+  // This check uses string comparison as it needs less code and data
+  // to do than fetching the associated ArtMethod from the DexCache
+  // and checking against ArtMethods in the well known classes. The
+  // verifier needs to perform a more rigorous check.
+  const char* method_name = dex_file.GetMethodName(dex_file.GetMethodId(invoke_method_idx));
+  bool is_invoke_exact = (0 == strcmp(method_name, "invokeExact"));
+  DCHECK(is_invoke_exact || (0 == strcmp(method_name, "invoke")));
+  return is_invoke_exact;
+}
+
 template<bool is_range, bool do_access_check>
 inline bool DoInvokePolymorphic(Thread* self,
                                 ShadowFrame& shadow_frame,
@@ -628,8 +784,14 @@
                                 JValue* result) REQUIRES_SHARED(Locks::mutator_lock_) {
   // Invoke-polymorphic instructions always take a receiver. i.e, they are never static.
   const uint32_t vRegC = (is_range) ? inst->VRegC_4rcc() : inst->VRegC_45cc();
+  const int invoke_method_idx = (is_range) ? inst->VRegB_4rcc() : inst->VRegB_45cc();
 
-  // The method_idx here is the name of the signature polymorphic method that
+  // Determine if this invocation is MethodHandle.invoke() or
+  // MethodHandle.invokeExact().
+  bool is_invoke_exact = IsInvokeExact(shadow_frame.GetMethod()->GetDeclaringClass()->GetDexFile(),
+                                       invoke_method_idx);
+
+  // The invoke_method_idx here is the name of the signature polymorphic method that
   // was symbolically invoked in bytecode (say MethodHandle.invoke or MethodHandle.invokeExact)
   // and not the method that we'll dispatch to in the end.
   //
@@ -642,11 +804,9 @@
       ObjPtr<mirror::MethodHandleImpl>::DownCast(
           MakeObjPtr(shadow_frame.GetVRegReference(vRegC)))));
   if (UNLIKELY(method_handle.Get() == nullptr)) {
-    const int method_idx = (is_range) ? inst->VRegB_4rcc() : inst->VRegB_45cc();
     // Note that the invoke type is kVirtual here because a call to a signature
     // polymorphic method is shaped like a virtual call at the bytecode level.
-    ThrowNullPointerExceptionForMethodAccess(method_idx, InvokeType::kVirtual);
-
+    ThrowNullPointerExceptionForMethodAccess(invoke_method_idx, InvokeType::kVirtual);
     result->SetJ(0);
     return false;
   }
@@ -672,20 +832,18 @@
     return false;
   }
 
-  // Get the method we're actually invoking along with the kind of
-  // invoke that is desired. We don't need to perform access checks at this
-  // point because they would have been performed on our behalf at the point
-  // of creation of the method handle.
-  ArtMethod* called_method = method_handle->GetTargetMethod();
   const MethodHandleKind handle_kind = method_handle->GetHandleKind();
   Handle<mirror::MethodType> handle_type(hs.NewHandle(method_handle->GetMethodType()));
-  CHECK(called_method != nullptr);
   CHECK(handle_type.Get() != nullptr);
+  if (UNLIKELY(is_invoke_exact && !callsite_type->IsExactMatch(handle_type.Get()))) {
+    ThrowWrongMethodTypeException(handle_type.Get(), callsite_type.Get());
+    return false;
+  }
 
   uint32_t arg[Instruction::kMaxVarArgRegs] = {};
-  uint32_t receiver_vregC = 0;
+  uint32_t first_src_reg = 0;
   if (is_range) {
-    receiver_vregC = (inst->VRegC_4rcc() + 1);
+    first_src_reg = (inst->VRegC_4rcc() + 1);
   } else {
     inst->GetVarArgs(arg, inst_data);
     arg[0] = arg[1];
@@ -693,20 +851,22 @@
     arg[2] = arg[3];
     arg[3] = arg[4];
     arg[4] = 0;
-    receiver_vregC = arg[0];
+    first_src_reg = arg[0];
   }
 
   if (IsInvoke(handle_kind)) {
+    // Get the method we're actually invoking along with the kind of
+    // invoke that is desired. We don't need to perform access checks at this
+    // point because they would have been performed on our behalf at the point
+    // of creation of the method handle.
+    ArtMethod* called_method = method_handle->GetTargetMethod();
+    CHECK(called_method != nullptr);
+
     if (handle_kind == kInvokeVirtual || handle_kind == kInvokeInterface) {
-      ObjPtr<mirror::Object> receiver = shadow_frame.GetVRegReference(receiver_vregC);
-      ObjPtr<mirror::Class> declaring_class = called_method->GetDeclaringClass();
-      // Verify that _vRegC is an object reference and of the type expected by
-      // the receiver.
-      called_method = receiver->GetClass()->FindVirtualMethodForVirtualOrInterface(
-          called_method, kRuntimePointerSize);
-      if (!VerifyObjectIsClass(receiver, declaring_class)) {
-        return false;
-      }
+      // TODO: Unfortunately, we have to postpone dynamic receiver based checks
+      // because the receiver might be cast or might come from an emulated stack
+      // frame, which means that it is unknown at this point. We perform these
+      // checks inside DoCallPolymorphic right before we do the actualy invoke.
     } else if (handle_kind == kInvokeDirect) {
       if (called_method->IsConstructor()) {
         // TODO(narayan) : We need to handle the case where the target method is a
@@ -744,12 +904,15 @@
     }
 
     if (handle_kind == kInvokeTransform) {
-      return DoCallTransform(called_method,
-                             callsite_type,
-                             self,
-                             shadow_frame,
-                             method_handle /* receiver */,
-                             result);
+      return DoCallTransform<is_range>(called_method,
+                                       callsite_type,
+                                       handle_type,
+                                       self,
+                                       shadow_frame,
+                                       method_handle /* receiver */,
+                                       result,
+                                       arg,
+                                       first_src_reg);
     } else {
       return DoCallPolymorphic<is_range>(called_method,
                                          callsite_type,
@@ -758,12 +921,42 @@
                                          shadow_frame,
                                          result,
                                          arg,
-                                         receiver_vregC);
+                                         first_src_reg,
+                                         handle_kind);
     }
   } else {
-    // TODO(narayan): Implement field getters and setters.
-    UNIMPLEMENTED(FATAL) << "Field references in method handles are not implemented yet.";
-    return false;
+    DCHECK(!is_range);
+    ArtField* field = method_handle->GetTargetField();
+    Primitive::Type field_type = field->GetTypeAsPrimitiveType();;
+
+    if (!is_invoke_exact) {
+      // TODO(oth): conversion plumbing for invoke().
+      UNIMPLEMENTED(FATAL);
+    }
+
+    switch (handle_kind) {
+      case kInstanceGet: {
+        ObjPtr<mirror::Object> obj = shadow_frame.GetVRegReference(first_src_reg);
+        DoFieldGetForInvokePolymorphic(self, shadow_frame, obj, field, field_type, result);
+        return true;
+      }
+      case kInstancePut: {
+        ObjPtr<mirror::Object> obj = shadow_frame.GetVRegReference(first_src_reg);
+        return DoFieldPutForInvokePolymorphic(self, shadow_frame, obj, field, field_type, arg[1]);
+      }
+      case kStaticGet: {
+        ObjPtr<mirror::Object> obj = field->GetDeclaringClass();
+        DoFieldGetForInvokePolymorphic(self, shadow_frame, obj, field, field_type, result);
+        return true;
+      }
+      case kStaticPut: {
+        ObjPtr<mirror::Object> obj = field->GetDeclaringClass();
+        return DoFieldPutForInvokePolymorphic(self, shadow_frame, obj, field, field_type, arg[0]);
+      }
+      default:
+        LOG(FATAL) << "Unreachable: " << handle_kind;
+        UNREACHABLE();
+    }
   }
 }
 
@@ -860,7 +1053,8 @@
                                      ShadowFrame& shadow_frame,
                                      JValue* result,
                                      uint32_t (&arg)[Instruction::kMaxVarArgRegs],
-                                     uint32_t first_src_reg) {
+                                     uint32_t first_src_reg,
+                                     const MethodHandleKind handle_kind) {
   // TODO(narayan): Wire in the String.init hacks.
 
   // Compute method information.
@@ -893,6 +1087,8 @@
       CREATE_SHADOW_FRAME(num_regs, &shadow_frame, called_method, /* dex pc */ 0);
   ShadowFrame* new_shadow_frame = shadow_frame_unique_ptr.get();
 
+  // Whether this polymorphic invoke was issued by a transformer method.
+  bool is_caller_transformer = false;
   // Thread might be suspended during PerformArgumentConversions due to the
   // allocations performed during boxing.
   {
@@ -914,18 +1110,16 @@
       // case, we'll have to unmarshal the EmulatedStackFrame into the
       // new_shadow_frame and perform argument conversions on it.
       if (IsCallerTransformer(callsite_type)) {
-        // The emulated stack frame will be the first ahnd only argument
-        // when we're coming through from a transformer.
-        //
-        // TODO(narayan): This should be a mirror::EmulatedStackFrame after that
-        // type is introduced.
-        ObjPtr<mirror::Object> emulated_stack_frame(
-            shadow_frame.GetVRegReference(first_src_reg));
-        if (!ConvertAndCopyArgumentsFromEmulatedStackFrame<is_range>(self,
-                                                                     emulated_stack_frame,
-                                                                     target_type,
-                                                                     first_dest_reg,
-                                                                     new_shadow_frame)) {
+        is_caller_transformer = true;
+        // The emulated stack frame is the first and only argument when we're coming
+        // through from a transformer.
+        ObjPtr<mirror::EmulatedStackFrame> emulated_stack_frame(
+            reinterpret_cast<mirror::EmulatedStackFrame*>(
+                shadow_frame.GetVRegReference(first_src_reg)));
+        if (!emulated_stack_frame->WriteToShadowFrame(self,
+                                                      target_type,
+                                                      first_dest_reg,
+                                                      new_shadow_frame)) {
           DCHECK(self->IsExceptionPending());
           result->SetL(0);
           return false;
@@ -945,20 +1139,51 @@
     }
   }
 
+  // See TODO in DoInvokePolymorphic : We need to perform this dynamic, receiver
+  // based dispatch right before we perform the actual call, because the
+  // receiver isn't known very early.
+  if (handle_kind == kInvokeVirtual || handle_kind == kInvokeInterface) {
+    ObjPtr<mirror::Object> receiver(new_shadow_frame->GetVRegReference(first_dest_reg));
+    ObjPtr<mirror::Class> declaring_class(called_method->GetDeclaringClass());
+    // Verify that _vRegC is an object reference and of the type expected by
+    // the receiver.
+    if (!VerifyObjectIsClass(receiver, declaring_class)) {
+      DCHECK(self->IsExceptionPending());
+      return false;
+    }
+
+    called_method = receiver->GetClass()->FindVirtualMethodForVirtualOrInterface(
+        called_method, kRuntimePointerSize);
+  }
+
   PerformCall(self, code_item, shadow_frame.GetMethod(), first_dest_reg, new_shadow_frame, result);
 
   // TODO(narayan): Perform return value conversions.
 
+  // If the caller of this signature polymorphic method was a transformer,
+  // we need to copy the result back out to the emulated stack frame.
+  if (is_caller_transformer && !self->IsExceptionPending()) {
+    ObjPtr<mirror::EmulatedStackFrame> emulated_stack_frame(
+        reinterpret_cast<mirror::EmulatedStackFrame*>(
+            shadow_frame.GetVRegReference(first_src_reg)));
+
+    emulated_stack_frame->SetReturnValue(self, *result);
+  }
+
   return !self->IsExceptionPending();
 }
 
+template <bool is_range>
 static inline bool DoCallTransform(ArtMethod* called_method,
                                    Handle<mirror::MethodType> callsite_type,
+                                   Handle<mirror::MethodType> callee_type,
                                    Thread* self,
                                    ShadowFrame& shadow_frame,
                                    Handle<mirror::MethodHandleImpl> receiver,
-                                   JValue* result) {
-  // This can be fixed, because the method we're calling here
+                                   JValue* result,
+                                   uint32_t (&arg)[Instruction::kMaxVarArgRegs],
+                                   uint32_t first_src_reg) {
+  // This can be fixed to two, because the method we're calling here
   // (MethodHandle.transformInternal) doesn't have any locals and the signature
   // is known :
   //
@@ -978,18 +1203,33 @@
       CREATE_SHADOW_FRAME(kNumRegsForTransform, &shadow_frame, called_method, /* dex pc */ 0);
   ShadowFrame* new_shadow_frame = shadow_frame_unique_ptr.get();
 
-  // TODO(narayan): Perform argument conversions first (if this is an inexact invoke), and
-  // then construct an argument list object that's passed through to the
-  // method. Note that the ArgumentList reference is currently a nullptr.
-  //
-  // NOTE(narayan): If the caller is a transformer method (i.e, there is only
-  // one argument and its type is EmulatedStackFrame), we can directly pass that
-  // through without having to do any additional work.
-  UNUSED(callsite_type);
+  StackHandleScope<1> hs(self);
+  MutableHandle<mirror::EmulatedStackFrame> sf(hs.NewHandle<mirror::EmulatedStackFrame>(nullptr));
+  if (IsCallerTransformer(callsite_type)) {
+    // If we're entering this transformer from another transformer, we can pass
+    // through the handle directly to the callee, instead of having to
+    // instantiate a new stack frame based on the shadow frame.
+    sf.Assign(reinterpret_cast<mirror::EmulatedStackFrame*>(
+        shadow_frame.GetVRegReference(first_src_reg)));
+  } else {
+    sf.Assign(mirror::EmulatedStackFrame::CreateFromShadowFrameAndArgs<is_range>(
+        self,
+        callsite_type,
+        callee_type,
+        shadow_frame,
+        first_src_reg,
+        arg));
+
+    // Something went wrong while creating the emulated stack frame, we should
+    // throw the pending exception.
+    if (sf.Get() == nullptr) {
+      DCHECK(self->IsExceptionPending());
+      return false;
+    }
+  }
 
   new_shadow_frame->SetVRegReference(0, receiver.Get());
-  // TODO(narayan): This is the EmulatedStackFrame, currently nullptr.
-  new_shadow_frame->SetVRegReference(1, nullptr);
+  new_shadow_frame->SetVRegReference(1, sf.Get());
 
   PerformCall(self,
               code_item,
@@ -998,6 +1238,12 @@
               new_shadow_frame,
               result);
 
+  // If the called transformer method we called has returned a value, then we
+  // need to copy it back to |result|.
+  if (!self->IsExceptionPending()) {
+    sf->GetReturnValue(self, result);
+  }
+
   return !self->IsExceptionPending();
 }
 
diff --git a/runtime/interpreter/interpreter_switch_impl.cc b/runtime/interpreter/interpreter_switch_impl.cc
index 243ed57..435ac62 100644
--- a/runtime/interpreter/interpreter_switch_impl.cc
+++ b/runtime/interpreter/interpreter_switch_impl.cc
@@ -1571,7 +1571,6 @@
             self, shadow_frame, inst, inst_data, &result_register);
         POSSIBLY_HANDLE_PENDING_EXCEPTION(!success, Next_4xx);
         break;
-        break;
       }
       case Instruction::NEG_INT:
         PREAMBLE();
diff --git a/runtime/method_handles-inl.h b/runtime/method_handles-inl.h
index b488133..ff5d2a1 100644
--- a/runtime/method_handles-inl.h
+++ b/runtime/method_handles-inl.h
@@ -64,44 +64,11 @@
   }
 }
 
-// A convenience class that allows for iteration through a list of
-// input argument registers |arg| for non-range invokes or a list of
-// consecutive registers starting with a given based for range
-// invokes.
-template <bool is_range> class ArgIterator {
- public:
-  ArgIterator(size_t first_src_reg,
-              const uint32_t (&arg)[Instruction::kMaxVarArgRegs]) :
-      first_src_reg_(first_src_reg),
-      arg_(arg),
-      arg_index_(0) {
-  }
-
-  uint32_t Next() {
-    const uint32_t next = (is_range ? first_src_reg_ + arg_index_ : arg_[arg_index_]);
-    ++arg_index_;
-
-    return next;
-  }
-
-  uint32_t NextPair() {
-    const uint32_t next = (is_range ? first_src_reg_ + arg_index_ : arg_[arg_index_]);
-    arg_index_ += 2;
-
-    return next;
-  }
-
- private:
-  const size_t first_src_reg_;
-  const uint32_t (&arg_)[Instruction::kMaxVarArgRegs];
-  size_t arg_index_;
-};
-
 REQUIRES_SHARED(Locks::mutator_lock_)
-bool ConvertJValue(Handle<mirror::Class> from,
-                   Handle<mirror::Class> to,
-                   const JValue& from_value,
-                   JValue* to_value) {
+inline bool ConvertJValue(Handle<mirror::Class> from,
+                          Handle<mirror::Class> to,
+                          const JValue& from_value,
+                          JValue* to_value) {
   const Primitive::Type from_type = from->GetPrimitiveType();
   const Primitive::Type to_type = to->GetPrimitiveType();
 
@@ -161,6 +128,66 @@
   return true;
 }
 
+template <typename G, typename S>
+bool PerformConversions(Thread* self,
+                        Handle<mirror::ObjectArray<mirror::Class>> from_types,
+                        Handle<mirror::ObjectArray<mirror::Class>> to_types,
+                        G* getter,
+                        S* setter,
+                        int32_t num_conversions) {
+  StackHandleScope<2> hs(self);
+  MutableHandle<mirror::Class> from(hs.NewHandle<mirror::Class>(nullptr));
+  MutableHandle<mirror::Class> to(hs.NewHandle<mirror::Class>(nullptr));
+
+  for (int32_t i = 0; i < num_conversions; ++i) {
+    from.Assign(from_types->GetWithoutChecks(i));
+    to.Assign(to_types->GetWithoutChecks(i));
+
+    const Primitive::Type from_type = from->GetPrimitiveType();
+    const Primitive::Type to_type = to->GetPrimitiveType();
+
+    if (from.Get() == to.Get()) {
+      // Easy case - the types are identical. Nothing left to do except to pass
+      // the arguments along verbatim.
+      if (Primitive::Is64BitType(from_type)) {
+        setter->SetLong(getter->GetLong());
+      } else if (from_type == Primitive::kPrimNot) {
+        setter->SetReference(getter->GetReference());
+      } else {
+        setter->Set(getter->Get());
+      }
+
+      continue;
+    } else {
+      JValue from_value;
+      JValue to_value;
+
+      if (Primitive::Is64BitType(from_type)) {
+        from_value.SetJ(getter->GetLong());
+      } else if (from_type == Primitive::kPrimNot) {
+        from_value.SetL(getter->GetReference());
+      } else {
+        from_value.SetI(getter->Get());
+      }
+
+      if (!ConvertJValue(from, to, from_value, &to_value)) {
+        DCHECK(self->IsExceptionPending());
+        return false;
+      }
+
+      if (Primitive::Is64BitType(to_type)) {
+        setter->SetLong(to_value.GetJ());
+      } else if (to_type == Primitive::kPrimNot) {
+        setter->SetReference(to_value.GetL());
+      } else {
+        setter->Set(to_value.GetI());
+      }
+    }
+  }
+
+  return true;
+}
+
 template <bool is_range>
 bool ConvertAndCopyArgumentsFromCallerFrame(Thread* self,
                                             Handle<mirror::MethodType> callsite_type,
@@ -180,89 +207,17 @@
     return false;
   }
 
-  ArgIterator<is_range> input_args(first_src_reg, arg);
-  size_t to_arg_index = 0;
-  MutableHandle<mirror::Class> from(hs.NewHandle<mirror::Class>(nullptr));
-  MutableHandle<mirror::Class> to(hs.NewHandle<mirror::Class>(nullptr));
-  for (int32_t i = 0; i < num_method_params; ++i) {
-    from.Assign(from_types->GetWithoutChecks(i));
-    to.Assign(to_types->GetWithoutChecks(i));
+  ShadowFrameGetter<is_range> getter(first_src_reg, arg, caller_frame);
+  ShadowFrameSetter setter(callee_frame, first_dest_reg);
 
-    const Primitive::Type from_type = from->GetPrimitiveType();
-    const Primitive::Type to_type = to->GetPrimitiveType();
-
-    // Easy case - the types are identical. Nothing left to do except to pass
-    // the arguments along verbatim.
-    if (from.Get() == to.Get()) {
-      interpreter::AssignRegister(callee_frame,
-                                  caller_frame,
-                                  first_dest_reg + to_arg_index,
-                                  input_args.Next());
-      ++to_arg_index;
-
-      // This is a wide argument, we must use the second half of the register
-      // pair as well.
-      if (Primitive::Is64BitType(from_type)) {
-        interpreter::AssignRegister(callee_frame,
-                                    caller_frame,
-                                    first_dest_reg + to_arg_index,
-                                    input_args.Next());
-        ++to_arg_index;
-      }
-
-      continue;
-    } else {
-      JValue from_value;
-      JValue to_value;
-
-      if (Primitive::Is64BitType(from_type)) {
-        from_value.SetJ(caller_frame.GetVRegLong(input_args.NextPair()));
-      } else if (from_type == Primitive::kPrimNot) {
-        from_value.SetL(caller_frame.GetVRegReference(input_args.Next()));
-      } else {
-        from_value.SetI(caller_frame.GetVReg(input_args.Next()));
-      }
-
-      if (!ConvertJValue(from, to, from_value, &to_value)) {
-        DCHECK(self->IsExceptionPending());
-        return false;
-      }
-
-      if (Primitive::Is64BitType(to_type)) {
-        callee_frame->SetVRegLong(first_dest_reg + to_arg_index, to_value.GetJ());
-        to_arg_index += 2;
-      } else if (to_type == Primitive::kPrimNot) {
-        callee_frame->SetVRegReference(first_dest_reg + to_arg_index, to_value.GetL());
-        ++to_arg_index;
-      } else {
-        callee_frame->SetVReg(first_dest_reg + to_arg_index, to_value.GetI());
-        ++to_arg_index;
-      }
-    }
-  }
-
-  return true;
+  return PerformConversions<ShadowFrameGetter<is_range>, ShadowFrameSetter>(self,
+                                                                            from_types,
+                                                                            to_types,
+                                                                            &getter,
+                                                                            &setter,
+                                                                            num_method_params);
 }
 
-// Similar to |ConvertAndCopyArgumentsFromCallerFrame|, except that the
-// arguments are copied from an |EmulatedStackFrame|.
-template <bool is_range>
-bool ConvertAndCopyArgumentsFromEmulatedStackFrame(Thread* self,
-                                                   ObjPtr<mirror::Object> emulated_stack_frame,
-                                                   Handle<mirror::MethodType> callee_type,
-                                                   const uint32_t first_dest_reg,
-                                                   ShadowFrame* callee_frame) {
-  UNUSED(self);
-  UNUSED(emulated_stack_frame);
-  UNUSED(callee_type);
-  UNUSED(first_dest_reg);
-  UNUSED(callee_frame);
-
-  UNIMPLEMENTED(FATAL) << "ConvertAndCopyArgumentsFromEmulatedStackFrame is unimplemented";
-  return false;
-}
-
-
 }  // namespace art
 
 #endif  // ART_RUNTIME_METHOD_HANDLES_INL_H_
diff --git a/runtime/method_handles.h b/runtime/method_handles.h
index 5175dce..0d3f9f1 100644
--- a/runtime/method_handles.h
+++ b/runtime/method_handles.h
@@ -59,16 +59,66 @@
 // Performs a single argument conversion from type |from| to a distinct
 // type |to|. Returns true on success, false otherwise.
 REQUIRES_SHARED(Locks::mutator_lock_)
-bool ConvertJValue(Handle<mirror::Class> from,
-                   Handle<mirror::Class> to,
-                   const JValue& from_value,
-                   JValue* to_value) ALWAYS_INLINE;
+inline bool ConvertJValue(Handle<mirror::Class> from,
+                          Handle<mirror::Class> to,
+                          const JValue& from_value,
+                          JValue* to_value) ALWAYS_INLINE;
 
 // Perform argument conversions between |callsite_type| (the type of the
 // incoming arguments) and |callee_type| (the type of the method being
 // invoked). These include widening and narrowing conversions as well as
 // boxing and unboxing. Returns true on success, on false on failure. A
 // pending exception will always be set on failure.
+//
+// The values to be converted are read from an input source (of type G)
+// that provides three methods :
+//
+// class G {
+//   // Used to read the next boolean/short/int or float value from the
+//   // source.
+//   uint32_t Get();
+//
+//   // Used to the read the next reference value from the source.
+//   ObjPtr<mirror::Object> GetReference();
+//
+//   // Used to read the next double or long value from the source.
+//   int64_t GetLong();
+// }
+//
+// After conversion, the values are written to an output sink (of type S)
+// that provides three methods :
+//
+// class S {
+//   void Set(uint32_t);
+//   void SetReference(ObjPtr<mirror::Object>)
+//   void SetLong(int64_t);
+// }
+//
+// The semantics and usage of the Set methods are analagous to the getter
+// class.
+//
+// This method is instantiated in three different scenarions :
+// - <S = ShadowFrameSetter, G = ShadowFrameGetter> : copying from shadow
+//   frame to shadow frame, used in a regular polymorphic non-exact invoke.
+// - <S = EmulatedShadowFrameAccessor, G = ShadowFrameGetter> : entering into
+//   a transformer method from a polymorphic invoke.
+// - <S = ShadowFrameStter, G = EmulatedStackFrameAccessor> : entering into
+//   a regular poly morphic invoke from a transformer method.
+//
+// TODO(narayan): If we find that the instantiations of this function take
+// up too much space, we can make G / S abstract base classes that are
+// overridden by concrete classes.
+template <typename G, typename S>
+REQUIRES_SHARED(Locks::mutator_lock_)
+bool PerformConversions(Thread* self,
+                        Handle<mirror::ObjectArray<mirror::Class>> from_types,
+                        Handle<mirror::ObjectArray<mirror::Class>> to_types,
+                        G* getter,
+                        S* setter,
+                        int32_t num_conversions);
+
+// A convenience wrapper around |PerformConversions|, for the case where
+// the setter and getter are both ShadowFrame based.
 template <bool is_range> REQUIRES_SHARED(Locks::mutator_lock_)
 bool ConvertAndCopyArgumentsFromCallerFrame(Thread* self,
                                             Handle<mirror::MethodType> callsite_type,
@@ -79,15 +129,80 @@
                                             const uint32_t (&arg)[Instruction::kMaxVarArgRegs],
                                             ShadowFrame* callee_frame);
 
-// Similar to |ConvertAndCopyArgumentsFromCallerFrame|, except that the
-// arguments are copied from an |EmulatedStackFrame|.
-template <bool is_range> REQUIRES_SHARED(Locks::mutator_lock_)
-bool ConvertAndCopyArgumentsFromEmulatedStackFrame(Thread* self,
-                                                   ObjPtr<mirror::Object> emulated_stack_frame,
-                                                   Handle<mirror::MethodType> callee_type,
-                                                   const uint32_t first_dest_reg,
-                                                   ShadowFrame* callee_frame);
+// A convenience class that allows for iteration through a list of
+// input argument registers |arg| for non-range invokes or a list of
+// consecutive registers starting with a given based for range
+// invokes.
+//
+// This is used to iterate over input arguments while performing standard
+// argument conversions.
+template <bool is_range> class ShadowFrameGetter {
+ public:
+  ShadowFrameGetter(size_t first_src_reg,
+                    const uint32_t (&arg)[Instruction::kMaxVarArgRegs],
+                    const ShadowFrame& shadow_frame) :
+      first_src_reg_(first_src_reg),
+      arg_(arg),
+      shadow_frame_(shadow_frame),
+      arg_index_(0) {
+  }
 
+  ALWAYS_INLINE uint32_t Get() REQUIRES_SHARED(Locks::mutator_lock_) {
+    const uint32_t next = (is_range ? first_src_reg_ + arg_index_ : arg_[arg_index_]);
+    ++arg_index_;
+
+    return shadow_frame_.GetVReg(next);
+  }
+
+  ALWAYS_INLINE int64_t GetLong() REQUIRES_SHARED(Locks::mutator_lock_) {
+    const uint32_t next = (is_range ? first_src_reg_ + arg_index_ : arg_[arg_index_]);
+    arg_index_ += 2;
+
+    return shadow_frame_.GetVRegLong(next);
+  }
+
+  ALWAYS_INLINE ObjPtr<mirror::Object> GetReference() REQUIRES_SHARED(Locks::mutator_lock_) {
+    const uint32_t next = (is_range ? first_src_reg_ + arg_index_ : arg_[arg_index_]);
+    ++arg_index_;
+
+    return shadow_frame_.GetVRegReference(next);
+  }
+
+ private:
+  const size_t first_src_reg_;
+  const uint32_t (&arg_)[Instruction::kMaxVarArgRegs];
+  const ShadowFrame& shadow_frame_;
+  size_t arg_index_;
+};
+
+// A convenience class that allows values to be written to a given shadow frame,
+// starting at location |first_dst_reg|.
+class ShadowFrameSetter {
+ public:
+  ShadowFrameSetter(ShadowFrame* shadow_frame,
+                    size_t first_dst_reg) :
+    shadow_frame_(shadow_frame),
+    arg_index_(first_dst_reg) {
+  }
+
+  ALWAYS_INLINE void Set(uint32_t value) REQUIRES_SHARED(Locks::mutator_lock_) {
+    shadow_frame_->SetVReg(arg_index_++, value);
+  }
+
+  ALWAYS_INLINE void SetReference(ObjPtr<mirror::Object> value)
+      REQUIRES_SHARED(Locks::mutator_lock_) {
+    shadow_frame_->SetVRegReference(arg_index_++, value.Ptr());
+  }
+
+  ALWAYS_INLINE void SetLong(int64_t value) REQUIRES_SHARED(Locks::mutator_lock_) {
+    shadow_frame_->SetVRegLong(arg_index_, value);
+    arg_index_ += 2;
+  }
+
+ private:
+  ShadowFrame* shadow_frame_;
+  size_t arg_index_;
+};
 
 }  // namespace art
 
diff --git a/runtime/mirror/class-inl.h b/runtime/mirror/class-inl.h
index 9992a9e..bbdb2af 100644
--- a/runtime/mirror/class-inl.h
+++ b/runtime/mirror/class-inl.h
@@ -526,8 +526,7 @@
 template<VerifyObjectFlags kVerifyFlags,
          ReadBarrierOption kReadBarrierOption>
 inline IfTable* Class::GetIfTable() {
-  return GetFieldObject<IfTable, kVerifyFlags, kReadBarrierOption>(
-      OFFSET_OF_OBJECT_MEMBER(Class, iftable_));
+  return GetFieldObject<IfTable, kVerifyFlags, kReadBarrierOption>(IfTableOffset());
 }
 
 inline int32_t Class::GetIfTableCount() {
@@ -539,7 +538,7 @@
 }
 
 inline void Class::SetIfTable(ObjPtr<IfTable> new_iftable) {
-  SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, iftable_), new_iftable);
+  SetFieldObject<false>(IfTableOffset(), new_iftable);
 }
 
 inline LengthPrefixedArray<ArtField>* Class::GetIFieldsPtr() {
diff --git a/runtime/mirror/class.h b/runtime/mirror/class.h
index 5793795..f115e6c 100644
--- a/runtime/mirror/class.h
+++ b/runtime/mirror/class.h
@@ -680,6 +680,10 @@
     return MemberOffset(OFFSETOF_MEMBER(Class, dex_cache_));
   }
 
+  static MemberOffset IfTableOffset() {
+    return MemberOffset(OFFSETOF_MEMBER(Class, iftable_));
+  }
+
   enum {
     kDumpClassFullDetail = 1,
     kDumpClassClassLoader = (1 << 1),
diff --git a/runtime/mirror/dex_cache.h b/runtime/mirror/dex_cache.h
index f5d1b80..1ae694d 100644
--- a/runtime/mirror/dex_cache.h
+++ b/runtime/mirror/dex_cache.h
@@ -74,6 +74,7 @@
   static GcRoot<T> Lookup(std::atomic<DexCachePair<T>>* dex_cache,
                           uint32_t idx,
                           uint32_t cache_size) {
+    DCHECK_NE(cache_size, 0u);
     DexCachePair<T> element = dex_cache[idx % cache_size].load(std::memory_order_relaxed);
     if (idx != element.index) {
       return GcRoot<T>(nullptr);
diff --git a/runtime/mirror/emulated_stack_frame.cc b/runtime/mirror/emulated_stack_frame.cc
new file mode 100644
index 0000000..4ba71ea
--- /dev/null
+++ b/runtime/mirror/emulated_stack_frame.cc
@@ -0,0 +1,298 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "emulated_stack_frame.h"
+
+#include "class-inl.h"
+#include "gc_root-inl.h"
+#include "jvalue-inl.h"
+#include "method_handles.h"
+#include "method_handles-inl.h"
+#include "reflection-inl.h"
+
+namespace art {
+namespace mirror {
+
+GcRoot<mirror::Class> EmulatedStackFrame::static_class_;
+
+// Calculates the size of a stack frame based on the size of its argument
+// types and return types.
+static void CalculateFrameAndReferencesSize(ObjPtr<mirror::ObjectArray<mirror::Class>> p_types,
+                                            ObjPtr<mirror::Class> r_type,
+                                            size_t* frame_size_out,
+                                            size_t* references_size_out)
+    REQUIRES_SHARED(Locks::mutator_lock_) {
+  const size_t length = p_types->GetLength();
+  size_t frame_size = 0;
+  size_t references_size = 0;
+  for (size_t i = 0; i < length; ++i) {
+    ObjPtr<mirror::Class> type = p_types->GetWithoutChecks(i);
+    const Primitive::Type primitive_type = type->GetPrimitiveType();
+    if (primitive_type == Primitive::kPrimNot) {
+      references_size++;
+    } else if (Primitive::Is64BitType(primitive_type)) {
+      frame_size += 8;
+    } else {
+      frame_size += 4;
+    }
+  }
+
+  const Primitive::Type return_type = r_type->GetPrimitiveType();
+  if (return_type == Primitive::kPrimNot) {
+    references_size++;
+  } else if (Primitive::Is64BitType(return_type)) {
+    frame_size += 8;
+  } else {
+    frame_size += 4;
+  }
+
+  (*frame_size_out) = frame_size;
+  (*references_size_out) = references_size;
+}
+
+// Allows for read or write access to an emulated stack frame. Each
+// accessor index has an associated index into the references / stack frame
+// arrays which is incremented on every read or write to the frame.
+//
+// This class is used in conjunction with PerformConversions, either as a setter
+// or as a getter.
+class EmulatedStackFrameAccessor {
+ public:
+  EmulatedStackFrameAccessor(Handle<mirror::ObjectArray<mirror::Object>> references,
+                             Handle<mirror::ByteArray> stack_frame,
+                             size_t stack_frame_size) :
+    references_(references),
+    stack_frame_(stack_frame),
+    stack_frame_size_(stack_frame_size),
+    reference_idx_(0u),
+    stack_frame_idx_(0u) {
+  }
+
+  ALWAYS_INLINE void SetReference(ObjPtr<mirror::Object> reference)
+      REQUIRES_SHARED(Locks::mutator_lock_) {
+    references_->Set(reference_idx_++, reference);
+  }
+
+  ALWAYS_INLINE void Set(const uint32_t value) REQUIRES_SHARED(Locks::mutator_lock_) {
+    int8_t* array = stack_frame_->GetData();
+
+    CHECK_LE((stack_frame_idx_ + 4u), stack_frame_size_);
+    memcpy(array + stack_frame_idx_, &value, sizeof(uint32_t));
+    stack_frame_idx_ += 4u;
+  }
+
+  ALWAYS_INLINE void SetLong(const int64_t value) REQUIRES_SHARED(Locks::mutator_lock_) {
+    int8_t* array = stack_frame_->GetData();
+
+    CHECK_LE((stack_frame_idx_ + 8u), stack_frame_size_);
+    memcpy(array + stack_frame_idx_, &value, sizeof(int64_t));
+    stack_frame_idx_ += 8u;
+  }
+
+  ALWAYS_INLINE ObjPtr<mirror::Object> GetReference() REQUIRES_SHARED(Locks::mutator_lock_) {
+    return ObjPtr<mirror::Object>(references_->Get(reference_idx_++));
+  }
+
+  ALWAYS_INLINE uint32_t Get() REQUIRES_SHARED(Locks::mutator_lock_) {
+    const int8_t* array = stack_frame_->GetData();
+
+    CHECK_LE((stack_frame_idx_ + 4u), stack_frame_size_);
+    uint32_t val = 0;
+
+    memcpy(&val, array + stack_frame_idx_, sizeof(uint32_t));
+    stack_frame_idx_ += 4u;
+    return val;
+  }
+
+  ALWAYS_INLINE int64_t GetLong() REQUIRES_SHARED(Locks::mutator_lock_) {
+    const int8_t* array = stack_frame_->GetData();
+
+    CHECK_LE((stack_frame_idx_ + 8u), stack_frame_size_);
+    int64_t val = 0;
+
+    memcpy(&val, array + stack_frame_idx_, sizeof(int64_t));
+    stack_frame_idx_ += 8u;
+    return val;
+  }
+
+ private:
+  Handle<mirror::ObjectArray<mirror::Object>> references_;
+  Handle<mirror::ByteArray> stack_frame_;
+  const size_t stack_frame_size_;
+
+  size_t reference_idx_;
+  size_t stack_frame_idx_;
+
+  DISALLOW_COPY_AND_ASSIGN(EmulatedStackFrameAccessor);
+};
+
+template <bool is_range>
+mirror::EmulatedStackFrame* EmulatedStackFrame::CreateFromShadowFrameAndArgs(
+    Thread* self,
+    Handle<mirror::MethodType> caller_type,
+    Handle<mirror::MethodType> callee_type,
+    const ShadowFrame& caller_frame,
+    const uint32_t first_src_reg,
+    const uint32_t (&arg)[Instruction::kMaxVarArgRegs]) {
+  StackHandleScope<6> hs(self);
+
+  // Step 1: We must throw a WrongMethodTypeException if there's a mismatch in the
+  // number of arguments between the caller and the callsite.
+  Handle<mirror::ObjectArray<mirror::Class>> from_types(hs.NewHandle(caller_type->GetPTypes()));
+  Handle<mirror::ObjectArray<mirror::Class>> to_types(hs.NewHandle(callee_type->GetPTypes()));
+
+  const int32_t num_method_params = from_types->GetLength();
+  if (to_types->GetLength() != num_method_params) {
+    ThrowWrongMethodTypeException(callee_type.Get(), caller_type.Get());
+    return nullptr;
+  }
+
+  // Step 2: Calculate the size of the reference / byte arrays in the emulated
+  // stack frame.
+  size_t frame_size = 0;
+  size_t refs_size = 0;
+  Handle<mirror::Class> r_type(hs.NewHandle(callee_type->GetRType()));
+  CalculateFrameAndReferencesSize(to_types.Get(), r_type.Get(), &frame_size, &refs_size);
+
+  // Step 3 : Allocate the arrays.
+  ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
+  ObjPtr<mirror::Class> array_class(class_linker->GetClassRoot(ClassLinker::kObjectArrayClass));
+
+  Handle<mirror::ObjectArray<mirror::Object>> references(hs.NewHandle(
+      mirror::ObjectArray<mirror::Object>::Alloc(self, array_class, refs_size)));
+  Handle<ByteArray> stack_frame(hs.NewHandle(ByteArray::Alloc(self, frame_size)));
+
+  // Step 4 : Perform argument conversions (if required).
+  ShadowFrameGetter<is_range> getter(first_src_reg, arg, caller_frame);
+  EmulatedStackFrameAccessor setter(references, stack_frame, stack_frame->GetLength());
+  if (!PerformConversions<ShadowFrameGetter<is_range>, EmulatedStackFrameAccessor>(
+      self, from_types, to_types, &getter, &setter, num_method_params)) {
+    return nullptr;
+  }
+
+  // Step 5: Construct the EmulatedStackFrame object.
+  Handle<EmulatedStackFrame> sf(hs.NewHandle(
+      ObjPtr<EmulatedStackFrame>::DownCast(StaticClass()->AllocObject(self))));
+  sf->SetFieldObject<false>(TypeOffset(), callee_type.Get());
+  sf->SetFieldObject<false>(ReferencesOffset(), references.Get());
+  sf->SetFieldObject<false>(StackFrameOffset(), stack_frame.Get());
+
+  return sf.Get();
+}
+
+bool EmulatedStackFrame::WriteToShadowFrame(Thread* self,
+                                            Handle<mirror::MethodType> callee_type,
+                                            const uint32_t first_dest_reg,
+                                            ShadowFrame* callee_frame) {
+  StackHandleScope<4> hs(self);
+  Handle<mirror::ObjectArray<mirror::Class>> from_types(hs.NewHandle(GetType()->GetPTypes()));
+  Handle<mirror::ObjectArray<mirror::Class>> to_types(hs.NewHandle(callee_type->GetPTypes()));
+
+  const int32_t num_method_params = from_types->GetLength();
+  if (to_types->GetLength() != num_method_params) {
+    ThrowWrongMethodTypeException(callee_type.Get(), GetType());
+    return false;
+  }
+
+  Handle<mirror::ObjectArray<mirror::Object>> references(hs.NewHandle(GetReferences()));
+  Handle<ByteArray> stack_frame(hs.NewHandle(GetStackFrame()));
+
+  EmulatedStackFrameAccessor getter(references, stack_frame, stack_frame->GetLength());
+  ShadowFrameSetter setter(callee_frame, first_dest_reg);
+
+  return PerformConversions<EmulatedStackFrameAccessor, ShadowFrameSetter>(
+      self, from_types, to_types, &getter, &setter, num_method_params);
+}
+
+void EmulatedStackFrame::GetReturnValue(Thread* self, JValue* value) {
+  StackHandleScope<2> hs(self);
+  Handle<mirror::Class> r_type(hs.NewHandle(GetType()->GetRType()));
+
+  const Primitive::Type type = r_type->GetPrimitiveType();
+  if (type == Primitive::kPrimNot) {
+    Handle<mirror::ObjectArray<mirror::Object>> references(hs.NewHandle(GetReferences()));
+    value->SetL(references->GetWithoutChecks(references->GetLength() - 1));
+  } else {
+    Handle<ByteArray> stack_frame(hs.NewHandle(GetStackFrame()));
+    const int8_t* array = stack_frame->GetData();
+    const size_t length = stack_frame->GetLength();
+    if (Primitive::Is64BitType(type)) {
+      int64_t primitive = 0;
+      memcpy(&primitive, array + length - sizeof(int64_t), sizeof(int64_t));
+      value->SetJ(primitive);
+    } else {
+      uint32_t primitive = 0;
+      memcpy(&primitive, array + length - sizeof(uint32_t), sizeof(uint32_t));
+      value->SetI(primitive);
+    }
+  }
+}
+
+void EmulatedStackFrame::SetReturnValue(Thread* self, const JValue& value) {
+  StackHandleScope<2> hs(self);
+  Handle<mirror::Class> r_type(hs.NewHandle(GetType()->GetRType()));
+
+  const Primitive::Type type = r_type->GetPrimitiveType();
+  if (type == Primitive::kPrimNot) {
+    Handle<mirror::ObjectArray<mirror::Object>> references(hs.NewHandle(GetReferences()));
+    references->SetWithoutChecks<false>(references->GetLength() - 1, value.GetL());
+  } else {
+    Handle<ByteArray> stack_frame(hs.NewHandle(GetStackFrame()));
+    int8_t* array = stack_frame->GetData();
+    const size_t length = stack_frame->GetLength();
+    if (Primitive::Is64BitType(type)) {
+      const int64_t primitive = value.GetJ();
+      memcpy(array + length - sizeof(int64_t), &primitive, sizeof(int64_t));
+    } else {
+      const uint32_t primitive = value.GetI();
+      memcpy(array + length - sizeof(uint32_t), &primitive, sizeof(uint32_t));
+    }
+  }
+}
+
+void EmulatedStackFrame::SetClass(Class* klass) {
+  CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass;
+  CHECK(klass != nullptr);
+  static_class_ = GcRoot<Class>(klass);
+}
+
+void EmulatedStackFrame::ResetClass() {
+  CHECK(!static_class_.IsNull());
+  static_class_ = GcRoot<Class>(nullptr);
+}
+
+void EmulatedStackFrame::VisitRoots(RootVisitor* visitor) {
+  static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
+}
+
+// Explicit DoInvokePolymorphic template function declarations.
+#define EXPLICIT_CREATE_FROM_SHADOW_FRAME_AND_ARGS_DECL(_is_range)                         \
+  template REQUIRES_SHARED(Locks::mutator_lock_)                                           \
+  mirror::EmulatedStackFrame* EmulatedStackFrame::CreateFromShadowFrameAndArgs<_is_range>( \
+    Thread* self,                                                                          \
+    Handle<mirror::MethodType> caller_type,                                                \
+    Handle<mirror::MethodType> callee_type,                                                \
+    const ShadowFrame& caller_frame,                                                       \
+    const uint32_t first_src_reg,                                                          \
+    const uint32_t (&arg)[Instruction::kMaxVarArgRegs])                                    \
+
+EXPLICIT_CREATE_FROM_SHADOW_FRAME_AND_ARGS_DECL(true);
+EXPLICIT_CREATE_FROM_SHADOW_FRAME_AND_ARGS_DECL(false);
+#undef EXPLICIT_CREATE_FROM_SHADOW_FRAME_AND_ARGS_DECL
+
+
+}  // namespace mirror
+}  // namespace art
diff --git a/runtime/mirror/emulated_stack_frame.h b/runtime/mirror/emulated_stack_frame.h
new file mode 100644
index 0000000..9fa06b7
--- /dev/null
+++ b/runtime/mirror/emulated_stack_frame.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef ART_RUNTIME_MIRROR_EMULATED_STACK_FRAME_H_
+#define ART_RUNTIME_MIRROR_EMULATED_STACK_FRAME_H_
+
+#include "dex_instruction.h"
+#include "method_type.h"
+#include "object.h"
+#include "stack.h"
+#include "string.h"
+#include "utils.h"
+
+namespace art {
+
+struct EmulatedStackFrameOffsets;
+
+namespace mirror {
+
+// C++ mirror of dalvik.system.EmulatedStackFrame
+class MANAGED EmulatedStackFrame : public Object {
+ public:
+  // Creates an emulated stack frame whose type is |frame_type| from
+  // a shadow frame.
+  template <bool is_range>
+  static mirror::EmulatedStackFrame* CreateFromShadowFrameAndArgs(
+      Thread* self,
+      Handle<mirror::MethodType> args_type,
+      Handle<mirror::MethodType> frame_type,
+      const ShadowFrame& caller_frame,
+      const uint32_t first_src_reg,
+      const uint32_t (&arg)[Instruction::kMaxVarArgRegs]) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Writes the contents of this emulated stack frame to the |callee_frame|
+  // whose type is |callee_type|, starting at |first_dest_reg|.
+  bool WriteToShadowFrame(
+      Thread* self,
+      Handle<mirror::MethodType> callee_type,
+      const uint32_t first_dest_reg,
+      ShadowFrame* callee_frame) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Sets |value| to the return value written to this emulated stack frame (if any).
+  void GetReturnValue(Thread* self, JValue* value) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Sets the return value slot of this emulated stack frame to |value|.
+  void SetReturnValue(Thread* self, const JValue& value) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  static void SetClass(Class* klass) REQUIRES_SHARED(Locks::mutator_lock_);
+  static void ResetClass() REQUIRES_SHARED(Locks::mutator_lock_);
+  static void VisitRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_);
+
+ private:
+  static mirror::Class* StaticClass() REQUIRES_SHARED(Locks::mutator_lock_) {
+    return static_class_.Read();
+  }
+
+  mirror::MethodType* GetType() REQUIRES_SHARED(Locks::mutator_lock_) {
+    return GetFieldObject<MethodType>(OFFSET_OF_OBJECT_MEMBER(EmulatedStackFrame, type_));
+  }
+
+  mirror::ObjectArray<mirror::Object>* GetReferences() REQUIRES_SHARED(Locks::mutator_lock_) {
+    return GetFieldObject<mirror::ObjectArray<mirror::Object>>(
+        OFFSET_OF_OBJECT_MEMBER(EmulatedStackFrame, references_));
+  }
+
+  mirror::ByteArray* GetStackFrame() REQUIRES_SHARED(Locks::mutator_lock_) {
+    return GetFieldObject<mirror::ByteArray>(
+        OFFSET_OF_OBJECT_MEMBER(EmulatedStackFrame, stack_frame_));
+  }
+
+  static MemberOffset TypeOffset() {
+    return MemberOffset(OFFSETOF_MEMBER(EmulatedStackFrame, type_));
+  }
+
+  static MemberOffset ReferencesOffset() {
+    return MemberOffset(OFFSETOF_MEMBER(EmulatedStackFrame, references_));
+  }
+
+  static MemberOffset StackFrameOffset() {
+    return MemberOffset(OFFSETOF_MEMBER(EmulatedStackFrame, stack_frame_));
+  }
+
+  HeapReference<mirror::ObjectArray<mirror::Object>> references_;
+  HeapReference<mirror::ByteArray> stack_frame_;
+  HeapReference<mirror::MethodType> type_;
+
+  static GcRoot<mirror::Class> static_class_;  // dalvik.system.EmulatedStackFrame.class
+
+  friend struct art::EmulatedStackFrameOffsets;  // for verifying offset information
+  DISALLOW_IMPLICIT_CONSTRUCTORS(EmulatedStackFrame);
+};
+
+}  // namespace mirror
+}  // namespace art
+
+#endif  // ART_RUNTIME_MIRROR_EMULATED_STACK_FRAME_H_
diff --git a/runtime/mirror/method_handle_impl.h b/runtime/mirror/method_handle_impl.h
index 40716ad..7bf9c5b 100644
--- a/runtime/mirror/method_handle_impl.h
+++ b/runtime/mirror/method_handle_impl.h
@@ -36,6 +36,11 @@
     return GetFieldObject<mirror::MethodType>(OFFSET_OF_OBJECT_MEMBER(MethodHandle, method_type_));
   }
 
+  ArtField* GetTargetField() REQUIRES_SHARED(Locks::mutator_lock_) {
+    return reinterpret_cast<ArtField*>(
+        GetField64(OFFSET_OF_OBJECT_MEMBER(MethodHandle, art_field_or_method_)));
+  }
+
   ArtMethod* GetTargetMethod() REQUIRES_SHARED(Locks::mutator_lock_) {
     return reinterpret_cast<ArtMethod*>(
         GetField64(OFFSET_OF_OBJECT_MEMBER(MethodHandle, art_field_or_method_)));
diff --git a/runtime/mirror/method_type.cc b/runtime/mirror/method_type.cc
index 0b52931..9b0f872 100644
--- a/runtime/mirror/method_type.cc
+++ b/runtime/mirror/method_type.cc
@@ -65,6 +65,25 @@
   return true;
 }
 
+std::string MethodType::PrettyDescriptor() REQUIRES_SHARED(Locks::mutator_lock_) {
+  std::ostringstream ss;
+  ss << "(";
+
+  mirror::ObjectArray<Class>* const p_types = GetPTypes();
+  const int32_t params_length = p_types->GetLength();
+  for (int32_t i = 0; i < params_length; ++i) {
+    ss << p_types->GetWithoutChecks(i)->PrettyDescriptor();
+    if (i != (params_length - 1)) {
+      ss << ", ";
+    }
+  }
+
+  ss << ")";
+  ss << GetRType()->PrettyDescriptor();
+
+  return ss.str();
+}
+
 void MethodType::SetClass(Class* klass) {
   CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass;
   CHECK(klass != nullptr);
diff --git a/runtime/mirror/method_type.h b/runtime/mirror/method_type.h
index 5b50409..fa700b6 100644
--- a/runtime/mirror/method_type.h
+++ b/runtime/mirror/method_type.h
@@ -56,6 +56,10 @@
   // iff. they have the same return types and parameter types.
   bool IsExactMatch(mirror::MethodType* other) REQUIRES_SHARED(Locks::mutator_lock_);
 
+  // Returns the pretty descriptor for this method type, suitable for display in
+  // exception messages and the like.
+  std::string PrettyDescriptor() REQUIRES_SHARED(Locks::mutator_lock_);
+
  private:
   static MemberOffset FormOffset() {
     return MemberOffset(OFFSETOF_MEMBER(MethodType, form_));
diff --git a/runtime/mirror/string-inl.h b/runtime/mirror/string-inl.h
index d42bb92..d94b39f 100644
--- a/runtime/mirror/string-inl.h
+++ b/runtime/mirror/string-inl.h
@@ -160,7 +160,7 @@
   const int32_t offset_;
 };
 
-inline String* String::Intern() {
+inline ObjPtr<String> String::Intern() {
   return Runtime::Current()->GetInternTable()->InternWeak(this);
 }
 
diff --git a/runtime/mirror/string.h b/runtime/mirror/string.h
index a1b674a..6ce75bc 100644
--- a/runtime/mirror/string.h
+++ b/runtime/mirror/string.h
@@ -93,7 +93,7 @@
 
   void SetCharAt(int32_t index, uint16_t c) REQUIRES_SHARED(Locks::mutator_lock_);
 
-  String* Intern() REQUIRES_SHARED(Locks::mutator_lock_);
+  ObjPtr<String> Intern() REQUIRES_SHARED(Locks::mutator_lock_);
 
   template <bool kIsInstrumented>
   ALWAYS_INLINE static String* AllocFromByteArray(Thread* self, int32_t byte_length,
diff --git a/runtime/native/java_lang_VMClassLoader.cc b/runtime/native/java_lang_VMClassLoader.cc
index e5bab36..284d2d1 100644
--- a/runtime/native/java_lang_VMClassLoader.cc
+++ b/runtime/native/java_lang_VMClassLoader.cc
@@ -48,7 +48,7 @@
                                                           Handle<mirror::ClassLoader> class_loader)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     ObjPtr<mirror::Class> result;
-    if (cl->FindClassInPathClassLoader(soa, self, descriptor, hash, class_loader, &result)) {
+    if (cl->FindClassInBaseDexClassLoader(soa, self, descriptor, hash, class_loader, &result)) {
       return result;
     }
     return nullptr;
diff --git a/runtime/native/java_lang_reflect_Field.cc b/runtime/native/java_lang_reflect_Field.cc
index 329aae9..6206948 100644
--- a/runtime/native/java_lang_reflect_Field.cc
+++ b/runtime/native/java_lang_reflect_Field.cc
@@ -446,6 +446,12 @@
   return soa.AddLocalReference<jobject>(annotations::GetAnnotationForField(field, klass));
 }
 
+static jlong Field_getArtField(JNIEnv* env, jobject javaField) {
+  ScopedFastNativeObjectAccess soa(env);
+  ArtField* field = soa.Decode<mirror::Field>(javaField)->GetArtField();
+  return reinterpret_cast<jlong>(field);
+}
+
 static jobjectArray Field_getDeclaredAnnotations(JNIEnv* env, jobject javaField) {
   ScopedFastNativeObjectAccess soa(env);
   ArtField* field = soa.Decode<mirror::Field>(javaField)->GetArtField();
@@ -489,6 +495,7 @@
   NATIVE_METHOD(Field, getChar,    "!(Ljava/lang/Object;)C"),
   NATIVE_METHOD(Field, getAnnotationNative,
                 "!(Ljava/lang/Class;)Ljava/lang/annotation/Annotation;"),
+  NATIVE_METHOD(Field, getArtField, "!()J"),
   NATIVE_METHOD(Field, getDeclaredAnnotations, "!()[Ljava/lang/annotation/Annotation;"),
   NATIVE_METHOD(Field, getSignatureAnnotation, "!()[Ljava/lang/String;"),
   NATIVE_METHOD(Field, getDouble,  "!(Ljava/lang/Object;)D"),
diff --git a/runtime/oat_file_manager.cc b/runtime/oat_file_manager.cc
index 68f71f7..fde0a2c 100644
--- a/runtime/oat_file_manager.cc
+++ b/runtime/oat_file_manager.cc
@@ -260,7 +260,7 @@
   ArtField* const dex_file_field =
       soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile);
   ObjPtr<mirror::Object> dex_path_list =
-      soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList)->
+      soa.DecodeField(WellKnownClasses::dalvik_system_BaseDexClassLoader_pathList)->
       GetObject(class_loader.Get());
   if (dex_path_list != nullptr && dex_file_field != nullptr && cookie_field != nullptr) {
     // DexPathList has an array dexElements of Elements[] which each contain a dex file.
diff --git a/runtime/openjdkjvmti/Android.bp b/runtime/openjdkjvmti/Android.bp
index c8675a4..b323aef 100644
--- a/runtime/openjdkjvmti/Android.bp
+++ b/runtime/openjdkjvmti/Android.bp
@@ -18,10 +18,12 @@
     defaults: ["art_defaults"],
     host_supported: true,
     srcs: ["events.cc",
-           "heap.cc",
            "object_tagging.cc",
            "OpenjdkJvmTi.cc",
+           "ti_class.cc",
+           "ti_heap.cc",
            "ti_method.cc",
+           "ti_stack.cc",
            "transform.cc"],
     include_dirs: ["art/runtime"],
     shared_libs: [
diff --git a/runtime/openjdkjvmti/OpenjdkJvmTi.cc b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
index ed99009..d9031ea 100644
--- a/runtime/openjdkjvmti/OpenjdkJvmTi.cc
+++ b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
@@ -39,7 +39,6 @@
 #include "art_jvmti.h"
 #include "base/mutex.h"
 #include "events-inl.h"
-#include "heap.h"
 #include "jni_env_ext-inl.h"
 #include "object_tagging.h"
 #include "obj_ptr-inl.h"
@@ -47,7 +46,10 @@
 #include "scoped_thread_state_change-inl.h"
 #include "thread_list.h"
 #include "thread-inl.h"
+#include "ti_class.h"
+#include "ti_heap.h"
 #include "ti_method.h"
+#include "ti_stack.h"
 #include "transform.h"
 
 // TODO Remove this at some point by annotating all the methods. It was put in to make the skeleton
@@ -202,7 +204,12 @@
                                   jint max_frame_count,
                                   jvmtiFrameInfo* frame_buffer,
                                   jint* count_ptr) {
-    return ERR(NOT_IMPLEMENTED);
+    return StackUtil::GetStackTrace(env,
+                                    thread,
+                                    start_depth,
+                                    max_frame_count,
+                                    frame_buffer,
+                                    count_ptr);
   }
 
   static jvmtiError GetAllStackTraces(jvmtiEnv* env,
@@ -339,7 +346,7 @@
   }
 
   static jvmtiError ForceGarbageCollection(jvmtiEnv* env) {
-    return ERR(NOT_IMPLEMENTED);
+    return HeapUtil::ForceGarbageCollection(env);
   }
 
   static jvmtiError IterateOverObjectsReachableFromObject(
@@ -500,7 +507,7 @@
                                       jclass klass,
                                       char** signature_ptr,
                                       char** generic_ptr) {
-    return ERR(NOT_IMPLEMENTED);
+    return ClassUtil::GetClassSignature(env, klass, signature_ptr, generic_ptr);
   }
 
   static jvmtiError GetClassStatus(jvmtiEnv* env, jclass klass, jint* status_ptr) {
@@ -642,13 +649,13 @@
   static jvmtiError GetMethodDeclaringClass(jvmtiEnv* env,
                                             jmethodID method,
                                             jclass* declaring_class_ptr) {
-    return ERR(NOT_IMPLEMENTED);
+    return MethodUtil::GetMethodDeclaringClass(env, method, declaring_class_ptr);
   }
 
   static jvmtiError GetMethodModifiers(jvmtiEnv* env,
                                        jmethodID method,
                                        jint* modifiers_ptr) {
-    return ERR(NOT_IMPLEMENTED);
+    return MethodUtil::GetMethodModifiers(env, method, modifiers_ptr);
   }
 
   static jvmtiError GetMaxLocals(jvmtiEnv* env,
diff --git a/runtime/openjdkjvmti/art_jvmti.h b/runtime/openjdkjvmti/art_jvmti.h
index 78cb9a0..a321124 100644
--- a/runtime/openjdkjvmti/art_jvmti.h
+++ b/runtime/openjdkjvmti/art_jvmti.h
@@ -108,6 +108,19 @@
   return JvmtiUniquePtr(mem, JvmtiDeleter(env));
 }
 
+ALWAYS_INLINE
+static inline jvmtiError CopyString(jvmtiEnv* env, const char* src, unsigned char** copy) {
+  size_t len = strlen(src) + 1;
+  unsigned char* buf;
+  jvmtiError ret = env->Allocate(len, &buf);
+  if (ret != ERR(NONE)) {
+    return ret;
+  }
+  strcpy(reinterpret_cast<char*>(buf), src);
+  *copy = buf;
+  return ret;
+}
+
 }  // namespace openjdkjvmti
 
 #endif  // ART_RUNTIME_OPENJDKJVMTI_ART_JVMTI_H_
diff --git a/runtime/openjdkjvmti/ti_class.cc b/runtime/openjdkjvmti/ti_class.cc
new file mode 100644
index 0000000..de2076a
--- /dev/null
+++ b/runtime/openjdkjvmti/ti_class.cc
@@ -0,0 +1,73 @@
+/* Copyright (C) 2016 The Android Open Source Project
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This file implements interfaces from the file jvmti.h. This implementation
+ * is licensed under the same terms as the file jvmti.h.  The
+ * copyright and license information for the file jvmti.h follows.
+ *
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "ti_class.h"
+
+#include "art_jvmti.h"
+#include "scoped_thread_state_change-inl.h"
+#include "thread-inl.h"
+
+namespace openjdkjvmti {
+
+jvmtiError ClassUtil::GetClassSignature(jvmtiEnv* env,
+                                         jclass jklass,
+                                         char** signature_ptr,
+                                         char** generic_ptr) {
+  art::ScopedObjectAccess soa(art::Thread::Current());
+  art::ObjPtr<art::mirror::Class> klass = soa.Decode<art::mirror::Class>(jklass);
+  if (klass == nullptr) {
+    return ERR(INVALID_CLASS);
+  }
+
+  JvmtiUniquePtr sig_copy;
+  if (signature_ptr != nullptr) {
+    std::string storage;
+    const char* descriptor = klass->GetDescriptor(&storage);
+
+    unsigned char* tmp;
+    jvmtiError ret = CopyString(env, descriptor, &tmp);
+    if (ret != ERR(NONE)) {
+      return ret;
+    }
+    sig_copy = MakeJvmtiUniquePtr(env, tmp);
+    *signature_ptr = reinterpret_cast<char*>(tmp);
+  }
+
+  // TODO: Support generic signature.
+  *generic_ptr = nullptr;
+
+  // Everything is fine, release the buffers.
+  sig_copy.release();
+
+  return ERR(NONE);
+}
+
+}  // namespace openjdkjvmti
diff --git a/runtime/openjdkjvmti/ti_class.h b/runtime/openjdkjvmti/ti_class.h
new file mode 100644
index 0000000..caa77d4
--- /dev/null
+++ b/runtime/openjdkjvmti/ti_class.h
@@ -0,0 +1,50 @@
+/* Copyright (C) 2016 The Android Open Source Project
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This file implements interfaces from the file jvmti.h. This implementation
+ * is licensed under the same terms as the file jvmti.h.  The
+ * copyright and license information for the file jvmti.h follows.
+ *
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef ART_RUNTIME_OPENJDKJVMTI_TI_CLASS_H_
+#define ART_RUNTIME_OPENJDKJVMTI_TI_CLASS_H_
+
+#include "jni.h"
+#include "jvmti.h"
+
+namespace openjdkjvmti {
+
+class ClassUtil {
+ public:
+  static jvmtiError GetClassSignature(jvmtiEnv* env,
+                                      jclass klass,
+                                      char** signature_ptr,
+                                      char** generic_ptr);
+};
+
+}  // namespace openjdkjvmti
+
+#endif  // ART_RUNTIME_OPENJDKJVMTI_TI_CLASS_H_
diff --git a/runtime/openjdkjvmti/heap.cc b/runtime/openjdkjvmti/ti_heap.cc
similarity index 97%
rename from runtime/openjdkjvmti/heap.cc
rename to runtime/openjdkjvmti/ti_heap.cc
index 1799e19..6b20743 100644
--- a/runtime/openjdkjvmti/heap.cc
+++ b/runtime/openjdkjvmti/ti_heap.cc
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "heap.h"
+#include "ti_heap.h"
 
 #include "art_jvmti.h"
 #include "base/macros.h"
@@ -210,4 +210,10 @@
   return ERR(NONE);
 }
 
+jvmtiError HeapUtil::ForceGarbageCollection(jvmtiEnv* env ATTRIBUTE_UNUSED) {
+  art::Runtime::Current()->GetHeap()->CollectGarbage(false);
+
+  return ERR(NONE);
+}
+
 }  // namespace openjdkjvmti
diff --git a/runtime/openjdkjvmti/heap.h b/runtime/openjdkjvmti/ti_heap.h
similarity index 86%
rename from runtime/openjdkjvmti/heap.h
rename to runtime/openjdkjvmti/ti_heap.h
index b6becb9..570dd0c 100644
--- a/runtime/openjdkjvmti/heap.h
+++ b/runtime/openjdkjvmti/ti_heap.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef ART_RUNTIME_OPENJDKJVMTI_HEAP_H_
-#define ART_RUNTIME_OPENJDKJVMTI_HEAP_H_
+#ifndef ART_RUNTIME_OPENJDKJVMTI_TI_HEAP_H_
+#define ART_RUNTIME_OPENJDKJVMTI_TI_HEAP_H_
 
 #include "jvmti.h"
 
@@ -36,6 +36,8 @@
                                 const jvmtiHeapCallbacks* callbacks,
                                 const void* user_data);
 
+  static jvmtiError ForceGarbageCollection(jvmtiEnv* env);
+
   ObjectTagTable* GetTags() {
     return tags_;
   }
@@ -46,4 +48,4 @@
 
 }  // namespace openjdkjvmti
 
-#endif  // ART_RUNTIME_OPENJDKJVMTI_HEAP_H_
+#endif  // ART_RUNTIME_OPENJDKJVMTI_TI_HEAP_H_
diff --git a/runtime/openjdkjvmti/ti_method.cc b/runtime/openjdkjvmti/ti_method.cc
index 8d943d9..6210936 100644
--- a/runtime/openjdkjvmti/ti_method.cc
+++ b/runtime/openjdkjvmti/ti_method.cc
@@ -34,22 +34,11 @@
 #include "art_jvmti.h"
 #include "art_method-inl.h"
 #include "base/enums.h"
+#include "modifiers.h"
 #include "scoped_thread_state_change-inl.h"
 
 namespace openjdkjvmti {
 
-static jvmtiError CopyString(jvmtiEnv* env, const char* src, unsigned char** copy) {
-  size_t len = strlen(src) + 1;
-  unsigned char* buf;
-  jvmtiError ret = env->Allocate(len, &buf);
-  if (ret != ERR(NONE)) {
-    return ret;
-  }
-  strcpy(reinterpret_cast<char*>(buf), src);
-  *copy = buf;
-  return ret;
-}
-
 jvmtiError MethodUtil::GetMethodName(jvmtiEnv* env,
                                      jmethodID method,
                                      char** name_ptr,
@@ -97,4 +86,47 @@
   return ERR(NONE);
 }
 
+jvmtiError MethodUtil::GetMethodDeclaringClass(jvmtiEnv* env ATTRIBUTE_UNUSED,
+                                               jmethodID method,
+                                               jclass* declaring_class_ptr) {
+  if (declaring_class_ptr == nullptr) {
+    return ERR(NULL_POINTER);
+  }
+
+  art::ScopedObjectAccess soa(art::Thread::Current());
+  art::ArtMethod* art_method = soa.DecodeMethod(method);
+  // Note: No GetInterfaceMethodIfProxy, we want to actual class.
+
+  art::mirror::Class* klass = art_method->GetDeclaringClass();
+  *declaring_class_ptr = soa.AddLocalReference<jclass>(klass);
+
+  return ERR(NONE);
+}
+
+jvmtiError MethodUtil::GetMethodModifiers(jvmtiEnv* env ATTRIBUTE_UNUSED,
+                                          jmethodID method,
+                                          jint* modifiers_ptr) {
+  if (modifiers_ptr == nullptr) {
+    return ERR(NULL_POINTER);
+  }
+
+  art::ScopedObjectAccess soa(art::Thread::Current());
+  art::ArtMethod* art_method = soa.DecodeMethod(method);
+
+  uint32_t modifiers = art_method->GetAccessFlags();
+
+  // Note: Keep this code in sync with Executable.fixMethodFlags.
+  if ((modifiers & art::kAccAbstract) != 0) {
+    modifiers &= ~art::kAccNative;
+  }
+  modifiers &= ~art::kAccSynchronized;
+  if ((modifiers & art::kAccDeclaredSynchronized) != 0) {
+    modifiers |= art::kAccSynchronized;
+  }
+  modifiers &= art::kAccJavaFlagsMask;
+
+  *modifiers_ptr = modifiers;
+  return ERR(NONE);
+}
+
 }  // namespace openjdkjvmti
diff --git a/runtime/openjdkjvmti/ti_method.h b/runtime/openjdkjvmti/ti_method.h
index 17a3728..43f11f9 100644
--- a/runtime/openjdkjvmti/ti_method.h
+++ b/runtime/openjdkjvmti/ti_method.h
@@ -44,6 +44,14 @@
                                   char** name_ptr,
                                   char** signature_ptr,
                                   char** generic_ptr);
+
+  static jvmtiError GetMethodDeclaringClass(jvmtiEnv* env,
+                                            jmethodID method,
+                                            jclass* declaring_class_ptr);
+
+  static jvmtiError GetMethodModifiers(jvmtiEnv* env,
+                                       jmethodID method,
+                                       jint* modifiers_ptr);
 };
 
 }  // namespace openjdkjvmti
diff --git a/runtime/openjdkjvmti/ti_stack.cc b/runtime/openjdkjvmti/ti_stack.cc
new file mode 100644
index 0000000..33e677f
--- /dev/null
+++ b/runtime/openjdkjvmti/ti_stack.cc
@@ -0,0 +1,195 @@
+/* Copyright (C) 2016 The Android Open Source Project
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This file implements interfaces from the file jvmti.h. This implementation
+ * is licensed under the same terms as the file jvmti.h.  The
+ * copyright and license information for the file jvmti.h follows.
+ *
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "ti_stack.h"
+
+#include "art_jvmti.h"
+#include "art_method-inl.h"
+#include "base/enums.h"
+#include "dex_file.h"
+#include "dex_file_annotations.h"
+#include "jni_env_ext.h"
+#include "mirror/class.h"
+#include "mirror/dex_cache.h"
+#include "scoped_thread_state_change-inl.h"
+#include "stack.h"
+#include "thread.h"
+#include "thread_pool.h"
+
+namespace openjdkjvmti {
+
+struct GetStackTraceVisitor : public art::StackVisitor {
+  GetStackTraceVisitor(art::Thread* thread_in,
+                       art::ScopedObjectAccessAlreadyRunnable& soa_,
+                       size_t start_,
+                       size_t stop_)
+      : StackVisitor(thread_in, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
+        soa(soa_),
+        start(start_),
+        stop(stop_) {}
+
+  bool VisitFrame() REQUIRES_SHARED(art::Locks::mutator_lock_) {
+    art::ArtMethod* m = GetMethod();
+    if (m->IsRuntimeMethod()) {
+      return true;
+    }
+
+    if (start == 0) {
+      m = m->GetInterfaceMethodIfProxy(art::kRuntimePointerSize);
+      jmethodID id = soa.EncodeMethod(m);
+
+      art::mirror::DexCache* dex_cache = m->GetDexCache();
+      int32_t line_number = -1;
+      if (dex_cache != nullptr) {  // be tolerant of bad input
+        const art::DexFile* dex_file = dex_cache->GetDexFile();
+        line_number = art::annotations::GetLineNumFromPC(dex_file, m, GetDexPc(false));
+      }
+
+      jvmtiFrameInfo info = { id, static_cast<jlong>(line_number) };
+      frames.push_back(info);
+
+      if (stop == 1) {
+        return false;  // We're done.
+      } else if (stop > 0) {
+        stop--;
+      }
+    } else {
+      start--;
+    }
+
+    return true;
+  }
+
+  art::ScopedObjectAccessAlreadyRunnable& soa;
+  std::vector<jvmtiFrameInfo> frames;
+  size_t start;
+  size_t stop;
+};
+
+struct GetStackTraceClosure : public art::Closure {
+ public:
+  GetStackTraceClosure(size_t start, size_t stop)
+      : start_input(start),
+        stop_input(stop),
+        start_result(0),
+        stop_result(0) {}
+
+  void Run(art::Thread* self) OVERRIDE {
+    art::ScopedObjectAccess soa(art::Thread::Current());
+
+    GetStackTraceVisitor visitor(self, soa, start_input, stop_input);
+    visitor.WalkStack(false);
+
+    frames.swap(visitor.frames);
+    start_result = visitor.start;
+    stop_result = visitor.stop;
+  }
+
+  const size_t start_input;
+  const size_t stop_input;
+
+  std::vector<jvmtiFrameInfo> frames;
+  size_t start_result;
+  size_t stop_result;
+};
+
+jvmtiError StackUtil::GetStackTrace(jvmtiEnv* jvmti_env ATTRIBUTE_UNUSED,
+                                    jthread java_thread,
+                                    jint start_depth,
+                                    jint max_frame_count,
+                                    jvmtiFrameInfo* frame_buffer,
+                                    jint* count_ptr) {
+  if (java_thread == nullptr) {
+    return ERR(INVALID_THREAD);
+  }
+
+  art::Thread* thread;
+  {
+    // TODO: Need non-aborting call here, to return JVMTI_ERROR_INVALID_THREAD.
+    art::ScopedObjectAccess soa(art::Thread::Current());
+    art::MutexLock mu(soa.Self(), *art::Locks::thread_list_lock_);
+    thread = art::Thread::FromManagedThread(soa, java_thread);
+    DCHECK(thread != nullptr);
+  }
+
+  art::ThreadState state = thread->GetState();
+  if (state == art::ThreadState::kStarting ||
+      state == art::ThreadState::kTerminated ||
+      thread->IsStillStarting()) {
+    return ERR(THREAD_NOT_ALIVE);
+  }
+
+  if (max_frame_count < 0) {
+    return ERR(ILLEGAL_ARGUMENT);
+  }
+  if (frame_buffer == nullptr || count_ptr == nullptr) {
+    return ERR(NULL_POINTER);
+  }
+
+  if (max_frame_count == 0) {
+    *count_ptr = 0;
+    return ERR(NONE);
+  }
+
+  GetStackTraceClosure closure(start_depth >= 0 ? static_cast<size_t>(start_depth) : 0,
+                               start_depth >= 0 ?static_cast<size_t>(max_frame_count) : 0);
+  thread->RequestSynchronousCheckpoint(&closure);
+
+  size_t collected_frames = closure.frames.size();
+
+  // Frames from the top.
+  if (start_depth >= 0) {
+    if (closure.start_result != 0) {
+      // Not enough frames.
+      return ERR(ILLEGAL_ARGUMENT);
+    }
+    DCHECK_LE(collected_frames, static_cast<size_t>(max_frame_count));
+    if (closure.frames.size() > 0) {
+      memcpy(frame_buffer, closure.frames.data(), collected_frames * sizeof(jvmtiFrameInfo));
+    }
+    *count_ptr = static_cast<jint>(closure.frames.size());
+    return ERR(NONE);
+  }
+
+  // Frames from the bottom.
+  if (collected_frames < static_cast<size_t>(-start_depth)) {
+    return ERR(ILLEGAL_ARGUMENT);
+  }
+
+  size_t count = std::min(static_cast<size_t>(-start_depth), static_cast<size_t>(max_frame_count));
+  memcpy(frame_buffer,
+         &closure.frames.data()[collected_frames + start_depth],
+         count * sizeof(jvmtiFrameInfo));
+  *count_ptr = static_cast<jint>(count);
+  return ERR(NONE);
+}
+
+}  // namespace openjdkjvmti
diff --git a/runtime/openjdkjvmti/ti_stack.h b/runtime/openjdkjvmti/ti_stack.h
new file mode 100644
index 0000000..1931ed3
--- /dev/null
+++ b/runtime/openjdkjvmti/ti_stack.h
@@ -0,0 +1,51 @@
+/* Copyright (C) 2016 The Android Open Source Project
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This file implements interfaces from the file jvmti.h. This implementation
+ * is licensed under the same terms as the file jvmti.h.  The
+ * copyright and license information for the file jvmti.h follows.
+ *
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef ART_RUNTIME_OPENJDKJVMTI_TI_STACK_H_
+#define ART_RUNTIME_OPENJDKJVMTI_TI_STACK_H_
+
+#include "jvmti.h"
+
+namespace openjdkjvmti {
+
+class StackUtil {
+ public:
+  static jvmtiError GetStackTrace(jvmtiEnv* env,
+                                  jthread thread,
+                                  jint start_depth,
+                                  jint max_frame_count,
+                                  jvmtiFrameInfo* frame_buffer,
+                                  jint* count_ptr);
+};
+
+}  // namespace openjdkjvmti
+
+#endif  // ART_RUNTIME_OPENJDKJVMTI_TI_STACK_H_
diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index 4e600ae..262608d 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -86,6 +86,7 @@
 #include "mirror/array.h"
 #include "mirror/class-inl.h"
 #include "mirror/class_loader.h"
+#include "mirror/emulated_stack_frame.h"
 #include "mirror/field.h"
 #include "mirror/method.h"
 #include "mirror/method_handle_impl.h"
@@ -1593,6 +1594,7 @@
   mirror::Field::VisitRoots(visitor);
   mirror::MethodType::VisitRoots(visitor);
   mirror::MethodHandleImpl::VisitRoots(visitor);
+  mirror::EmulatedStackFrame::VisitRoots(visitor);
   // Visit all the primitive array types classes.
   mirror::PrimitiveArray<uint8_t>::VisitRoots(visitor);   // BooleanArray
   mirror::PrimitiveArray<int8_t>::VisitRoots(visitor);    // ByteArray
@@ -1951,31 +1953,31 @@
   preinitialization_transaction_->RecordWriteArray(array, index, value);
 }
 
-void Runtime::RecordStrongStringInsertion(mirror::String* s) const {
+void Runtime::RecordStrongStringInsertion(ObjPtr<mirror::String> s) const {
   DCHECK(IsAotCompiler());
   DCHECK(IsActiveTransaction());
   preinitialization_transaction_->RecordStrongStringInsertion(s);
 }
 
-void Runtime::RecordWeakStringInsertion(mirror::String* s) const {
+void Runtime::RecordWeakStringInsertion(ObjPtr<mirror::String> s) const {
   DCHECK(IsAotCompiler());
   DCHECK(IsActiveTransaction());
   preinitialization_transaction_->RecordWeakStringInsertion(s);
 }
 
-void Runtime::RecordStrongStringRemoval(mirror::String* s) const {
+void Runtime::RecordStrongStringRemoval(ObjPtr<mirror::String> s) const {
   DCHECK(IsAotCompiler());
   DCHECK(IsActiveTransaction());
   preinitialization_transaction_->RecordStrongStringRemoval(s);
 }
 
-void Runtime::RecordWeakStringRemoval(mirror::String* s) const {
+void Runtime::RecordWeakStringRemoval(ObjPtr<mirror::String> s) const {
   DCHECK(IsAotCompiler());
   DCHECK(IsActiveTransaction());
   preinitialization_transaction_->RecordWeakStringRemoval(s);
 }
 
-void Runtime::RecordResolveString(mirror::DexCache* dex_cache, uint32_t string_idx) const {
+void Runtime::RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, uint32_t string_idx) const {
   DCHECK(IsAotCompiler());
   DCHECK(IsActiveTransaction());
   preinitialization_transaction_->RecordResolveString(dex_cache, string_idx);
diff --git a/runtime/runtime.h b/runtime/runtime.h
index b25ec23..86464ab 100644
--- a/runtime/runtime.h
+++ b/runtime/runtime.h
@@ -316,7 +316,8 @@
   }
 
   bool IsMethodHandlesEnabled() const {
-    return experimental_flags_ & ExperimentalFlags::kMethodHandles;
+    // return experimental_flags_ & ExperimentalFlags::kMethodHandles;
+    return true;
   }
 
   void DisallowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_);
@@ -509,15 +510,15 @@
       REQUIRES_SHARED(Locks::mutator_lock_);
   void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const
       REQUIRES_SHARED(Locks::mutator_lock_);
-  void RecordStrongStringInsertion(mirror::String* s) const
+  void RecordStrongStringInsertion(ObjPtr<mirror::String> s) const
       REQUIRES(Locks::intern_table_lock_);
-  void RecordWeakStringInsertion(mirror::String* s) const
+  void RecordWeakStringInsertion(ObjPtr<mirror::String> s) const
       REQUIRES(Locks::intern_table_lock_);
-  void RecordStrongStringRemoval(mirror::String* s) const
+  void RecordStrongStringRemoval(ObjPtr<mirror::String> s) const
       REQUIRES(Locks::intern_table_lock_);
-  void RecordWeakStringRemoval(mirror::String* s) const
+  void RecordWeakStringRemoval(ObjPtr<mirror::String> s) const
       REQUIRES(Locks::intern_table_lock_);
-  void RecordResolveString(mirror::DexCache* dex_cache, uint32_t string_idx) const
+  void RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, uint32_t string_idx) const
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   void SetFaultMessage(const std::string& message) REQUIRES(!fault_message_lock_);
diff --git a/runtime/stack.h b/runtime/stack.h
index e9ed497..8a446ec 100644
--- a/runtime/stack.h
+++ b/runtime/stack.h
@@ -572,8 +572,7 @@
   };
 
  protected:
-  StackVisitor(Thread* thread, Context* context, StackWalkKind walk_kind)
-      REQUIRES_SHARED(Locks::mutator_lock_);
+  StackVisitor(Thread* thread, Context* context, StackWalkKind walk_kind);
 
   bool GetRegisterIfAccessible(uint32_t reg, VRegKind kind, uint32_t* val) const
       REQUIRES_SHARED(Locks::mutator_lock_);
diff --git a/runtime/thread.cc b/runtime/thread.cc
index ef48b5d..3f7d086 100644
--- a/runtime/thread.cc
+++ b/runtime/thread.cc
@@ -1175,6 +1175,85 @@
   return success;
 }
 
+class BarrierClosure : public Closure {
+ public:
+  explicit BarrierClosure(Closure* wrapped) : wrapped_(wrapped), barrier_(0) {}
+
+  void Run(Thread* self) OVERRIDE {
+    wrapped_->Run(self);
+    barrier_.Pass(self);
+  }
+
+  void Wait(Thread* self) {
+    barrier_.Increment(self, 1);
+  }
+
+ private:
+  Closure* wrapped_;
+  Barrier barrier_;
+};
+
+void Thread::RequestSynchronousCheckpoint(Closure* function) {
+  if (this == Thread::Current()) {
+    // Asked to run on this thread. Just run.
+    function->Run(this);
+    return;
+  }
+  Thread* self = Thread::Current();
+
+  // The current thread is not this thread.
+
+  for (;;) {
+    // If this thread is runnable, try to schedule a checkpoint. Do some gymnastics to not hold the
+    // suspend-count lock for too long.
+    if (GetState() == ThreadState::kRunnable) {
+      BarrierClosure barrier_closure(function);
+      bool installed = false;
+      {
+        MutexLock mu(self, *Locks::thread_suspend_count_lock_);
+        installed = RequestCheckpoint(&barrier_closure);
+      }
+      if (installed) {
+        barrier_closure.Wait(self);
+        return;
+      }
+      // Fall-through.
+    }
+
+    // This thread is not runnable, make sure we stay suspended, then run the checkpoint.
+    // Note: ModifySuspendCountInternal also expects the thread_list_lock to be held in
+    //       certain situations.
+    {
+      MutexLock mu(self, *Locks::thread_list_lock_);
+      MutexLock mu2(self, *Locks::thread_suspend_count_lock_);
+
+      if (!ModifySuspendCount(self, +1, nullptr, false)) {
+        // Just retry the loop.
+        sched_yield();
+        continue;
+      }
+    }
+
+    while (GetState() == ThreadState::kRunnable) {
+      // We became runnable again. Wait till the suspend triggered in ModifySuspendCount
+      // moves us to suspended.
+      sched_yield();
+    }
+
+    function->Run(this);
+
+    {
+      MutexLock mu(self, *Locks::thread_list_lock_);
+      MutexLock mu2(self, *Locks::thread_suspend_count_lock_);
+
+      DCHECK_NE(GetState(), ThreadState::kRunnable);
+      CHECK(ModifySuspendCount(self, -1, nullptr, false));
+    }
+
+    return;  // We're done, break out of the loop.
+  }
+}
+
 Closure* Thread::GetFlipFunction() {
   Atomic<Closure*>* atomic_func = reinterpret_cast<Atomic<Closure*>*>(&tlsPtr_.flip_function);
   Closure* func;
diff --git a/runtime/thread.h b/runtime/thread.h
index 07ed78b..75b5b12 100644
--- a/runtime/thread.h
+++ b/runtime/thread.h
@@ -237,6 +237,8 @@
 
   bool RequestCheckpoint(Closure* function)
       REQUIRES(Locks::thread_suspend_count_lock_);
+  void RequestSynchronousCheckpoint(Closure* function)
+      REQUIRES(!Locks::thread_suspend_count_lock_, !Locks::thread_list_lock_);
 
   void SetFlipFunction(Closure* function);
   Closure* GetFlipFunction();
diff --git a/runtime/transaction.cc b/runtime/transaction.cc
index 9f8d981..c5da5d2 100644
--- a/runtime/transaction.cc
+++ b/runtime/transaction.cc
@@ -167,29 +167,29 @@
   array_log.LogValue(index, value);
 }
 
-void Transaction::RecordResolveString(mirror::DexCache* dex_cache, uint32_t string_idx) {
+void Transaction::RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, uint32_t string_idx) {
   DCHECK(dex_cache != nullptr);
   DCHECK_LT(string_idx, dex_cache->GetDexFile()->NumStringIds());
   MutexLock mu(Thread::Current(), log_lock_);
   resolve_string_logs_.push_back(ResolveStringLog(dex_cache, string_idx));
 }
 
-void Transaction::RecordStrongStringInsertion(mirror::String* s) {
+void Transaction::RecordStrongStringInsertion(ObjPtr<mirror::String> s) {
   InternStringLog log(s, InternStringLog::kStrongString, InternStringLog::kInsert);
   LogInternedString(log);
 }
 
-void Transaction::RecordWeakStringInsertion(mirror::String* s) {
+void Transaction::RecordWeakStringInsertion(ObjPtr<mirror::String> s) {
   InternStringLog log(s, InternStringLog::kWeakString, InternStringLog::kInsert);
   LogInternedString(log);
 }
 
-void Transaction::RecordStrongStringRemoval(mirror::String* s) {
+void Transaction::RecordStrongStringRemoval(ObjPtr<mirror::String> s) {
   InternStringLog log(s, InternStringLog::kStrongString, InternStringLog::kRemove);
   LogInternedString(log);
 }
 
-void Transaction::RecordWeakStringRemoval(mirror::String* s) {
+void Transaction::RecordWeakStringRemoval(ObjPtr<mirror::String> s) {
   InternStringLog log(s, InternStringLog::kWeakString, InternStringLog::kRemove);
   LogInternedString(log);
 }
@@ -470,10 +470,10 @@
     case InternStringLog::kInsert: {
       switch (string_kind_) {
         case InternStringLog::kStrongString:
-          intern_table->RemoveStrongFromTransaction(str_);
+          intern_table->RemoveStrongFromTransaction(str_.Read());
           break;
         case InternStringLog::kWeakString:
-          intern_table->RemoveWeakFromTransaction(str_);
+          intern_table->RemoveWeakFromTransaction(str_.Read());
           break;
         default:
           LOG(FATAL) << "Unknown interned string kind";
@@ -484,10 +484,10 @@
     case InternStringLog::kRemove: {
       switch (string_kind_) {
         case InternStringLog::kStrongString:
-          intern_table->InsertStrongFromTransaction(str_);
+          intern_table->InsertStrongFromTransaction(str_.Read());
           break;
         case InternStringLog::kWeakString:
-          intern_table->InsertWeakFromTransaction(str_);
+          intern_table->InsertWeakFromTransaction(str_.Read());
           break;
         default:
           LOG(FATAL) << "Unknown interned string kind";
@@ -502,14 +502,15 @@
 }
 
 void Transaction::InternStringLog::VisitRoots(RootVisitor* visitor) {
-  visitor->VisitRoot(reinterpret_cast<mirror::Object**>(&str_), RootInfo(kRootInternedString));
+  str_.VisitRoot(visitor, RootInfo(kRootInternedString));
 }
 
 void Transaction::ResolveStringLog::Undo() {
   dex_cache_.Read()->ClearString(string_idx_);
 }
 
-Transaction::ResolveStringLog::ResolveStringLog(mirror::DexCache* dex_cache, uint32_t string_idx)
+Transaction::ResolveStringLog::ResolveStringLog(ObjPtr<mirror::DexCache> dex_cache,
+                                                uint32_t string_idx)
     : dex_cache_(dex_cache),
       string_idx_(string_idx) {
   DCHECK(dex_cache != nullptr);
@@ -520,6 +521,15 @@
   dex_cache_.VisitRoot(visitor, RootInfo(kRootVMInternal));
 }
 
+Transaction::InternStringLog::InternStringLog(ObjPtr<mirror::String> s,
+                                              StringKind kind,
+                                              StringOp op)
+    : str_(s),
+      string_kind_(kind),
+      string_op_(op) {
+  DCHECK(s != nullptr);
+}
+
 void Transaction::ArrayLog::LogValue(size_t index, uint64_t value) {
   auto it = array_values_.find(index);
   if (it == array_values_.end()) {
diff --git a/runtime/transaction.h b/runtime/transaction.h
index 584dfb8..2ec2f50 100644
--- a/runtime/transaction.h
+++ b/runtime/transaction.h
@@ -83,21 +83,21 @@
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   // Record intern string table changes.
-  void RecordStrongStringInsertion(mirror::String* s)
+  void RecordStrongStringInsertion(ObjPtr<mirror::String> s)
       REQUIRES(Locks::intern_table_lock_)
       REQUIRES(!log_lock_);
-  void RecordWeakStringInsertion(mirror::String* s)
+  void RecordWeakStringInsertion(ObjPtr<mirror::String> s)
       REQUIRES(Locks::intern_table_lock_)
       REQUIRES(!log_lock_);
-  void RecordStrongStringRemoval(mirror::String* s)
+  void RecordStrongStringRemoval(ObjPtr<mirror::String> s)
       REQUIRES(Locks::intern_table_lock_)
       REQUIRES(!log_lock_);
-  void RecordWeakStringRemoval(mirror::String* s)
+  void RecordWeakStringRemoval(ObjPtr<mirror::String> s)
       REQUIRES(Locks::intern_table_lock_)
       REQUIRES(!log_lock_);
 
   // Record resolve string.
-  void RecordResolveString(mirror::DexCache* dex_cache, uint32_t string_idx)
+  void RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, uint32_t string_idx)
       REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!log_lock_);
 
@@ -182,10 +182,7 @@
       kInsert,
       kRemove
     };
-    InternStringLog(mirror::String* s, StringKind kind, StringOp op)
-      : str_(s), string_kind_(kind), string_op_(op) {
-      DCHECK(s != nullptr);
-    }
+    InternStringLog(ObjPtr<mirror::String> s, StringKind kind, StringOp op);
 
     void Undo(InternTable* intern_table)
         REQUIRES_SHARED(Locks::mutator_lock_)
@@ -193,14 +190,14 @@
     void VisitRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_);
 
    private:
-    mirror::String* str_;
+    GcRoot<mirror::String> str_;
     const StringKind string_kind_;
     const StringOp string_op_;
   };
 
   class ResolveStringLog : public ValueObject {
    public:
-    ResolveStringLog(mirror::DexCache* dex_cache, uint32_t string_idx);
+    ResolveStringLog(ObjPtr<mirror::DexCache> dex_cache, uint32_t string_idx);
 
     void Undo() REQUIRES_SHARED(Locks::mutator_lock_);
 
diff --git a/runtime/vdex_file.h b/runtime/vdex_file.h
index 28f9bb3..edd6ffe 100644
--- a/runtime/vdex_file.h
+++ b/runtime/vdex_file.h
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string>
 
+#include "base/array_ref.h"
 #include "base/macros.h"
 #include "mem_map.h"
 #include "os.h"
@@ -44,8 +45,11 @@
    public:
     Header(uint32_t dex_size, uint32_t verifier_deps_size, uint32_t quickening_info_size);
 
+    const char* GetMagic() const { return reinterpret_cast<const char*>(magic_); }
+    const char* GetVersion() const { return reinterpret_cast<const char*>(version_); }
     bool IsMagicValid() const;
     bool IsVersionValid() const;
+    bool IsValid() const { return IsMagicValid() && IsVersionValid(); }
 
     uint32_t GetDexSize() const { return dex_size_; }
     uint32_t GetVerifierDepsSize() const { return verifier_deps_size_; }
@@ -71,6 +75,15 @@
   const uint8_t* End() const { return mmap_->End(); }
   size_t Size() const { return mmap_->Size(); }
 
+  const Header& GetHeader() const {
+    return *reinterpret_cast<const Header*>(Begin());
+  }
+
+  ArrayRef<const uint8_t> GetVerifierDepsData() const {
+    return ArrayRef<const uint8_t>(
+        Begin() + sizeof(Header) + GetHeader().GetDexSize(), GetHeader().GetVerifierDepsSize());
+  }
+
  private:
   explicit VdexFile(MemMap* mmap) : mmap_(mmap) {}
 
diff --git a/runtime/verifier/verifier_deps.cc b/runtime/verifier/verifier_deps.cc
index 4d1e337..149861c 100644
--- a/runtime/verifier/verifier_deps.cc
+++ b/runtime/verifier/verifier_deps.cc
@@ -39,6 +39,11 @@
   return (it == dex_deps_.end()) ? nullptr : it->second.get();
 }
 
+const VerifierDeps::DexFileDeps* VerifierDeps::GetDexFileDeps(const DexFile& dex_file) const {
+  auto it = dex_deps_.find(&dex_file);
+  return (it == dex_deps_.end()) ? nullptr : it->second.get();
+}
+
 template <typename T>
 uint16_t VerifierDeps::GetAccessFlags(T* element) {
   static_assert(kAccJavaFlagsMask == 0xFFFF, "Unexpected value of a constant");
@@ -95,12 +100,12 @@
   return new_id;
 }
 
-std::string VerifierDeps::GetStringFromId(const DexFile& dex_file, uint32_t string_id) {
+std::string VerifierDeps::GetStringFromId(const DexFile& dex_file, uint32_t string_id) const {
   uint32_t num_ids_in_dex = dex_file.NumStringIds();
   if (string_id < num_ids_in_dex) {
     return std::string(dex_file.StringDataByIdx(string_id));
   } else {
-    DexFileDeps* deps = GetDexFileDeps(dex_file);
+    const DexFileDeps* deps = GetDexFileDeps(dex_file);
     DCHECK(deps != nullptr);
     string_id -= num_ids_in_dex;
     CHECK_LT(string_id, deps->strings_.size());
@@ -108,7 +113,7 @@
   }
 }
 
-bool VerifierDeps::IsInClassPath(ObjPtr<mirror::Class> klass) {
+bool VerifierDeps::IsInClassPath(ObjPtr<mirror::Class> klass) const {
   DCHECK(klass != nullptr);
 
   ObjPtr<mirror::DexCache> dex_cache = klass->GetDexCache();
@@ -431,35 +436,45 @@
   }
 }
 
-void VerifierDeps::Encode(std::vector<uint8_t>* buffer) const {
+void VerifierDeps::Encode(const std::vector<const DexFile*>& dex_files,
+                          std::vector<uint8_t>* buffer) const {
   MutexLock mu(Thread::Current(), *Locks::verifier_deps_lock_);
-  for (auto& entry : dex_deps_) {
-    EncodeStringVector(buffer, entry.second->strings_);
-    EncodeSet(buffer, entry.second->assignable_types_);
-    EncodeSet(buffer, entry.second->unassignable_types_);
-    EncodeSet(buffer, entry.second->classes_);
-    EncodeSet(buffer, entry.second->fields_);
-    EncodeSet(buffer, entry.second->direct_methods_);
-    EncodeSet(buffer, entry.second->virtual_methods_);
-    EncodeSet(buffer, entry.second->interface_methods_);
-    EncodeUint16Vector(buffer, entry.second->unverified_classes_);
+  for (const DexFile* dex_file : dex_files) {
+    const DexFileDeps& deps = *GetDexFileDeps(*dex_file);
+    EncodeStringVector(buffer, deps.strings_);
+    EncodeSet(buffer, deps.assignable_types_);
+    EncodeSet(buffer, deps.unassignable_types_);
+    EncodeSet(buffer, deps.classes_);
+    EncodeSet(buffer, deps.fields_);
+    EncodeSet(buffer, deps.direct_methods_);
+    EncodeSet(buffer, deps.virtual_methods_);
+    EncodeSet(buffer, deps.interface_methods_);
+    EncodeUint16Vector(buffer, deps.unverified_classes_);
   }
 }
 
-VerifierDeps::VerifierDeps(const std::vector<const DexFile*>& dex_files, ArrayRef<uint8_t> data)
+VerifierDeps::VerifierDeps(const std::vector<const DexFile*>& dex_files,
+                           ArrayRef<const uint8_t> data)
     : VerifierDeps(dex_files) {
+  if (data.empty()) {
+    // Return eagerly, as the first thing we expect from VerifierDeps data is
+    // the number of created strings, even if there is no dependency.
+    // Currently, only the boot image does not have any VerifierDeps data.
+    return;
+  }
   const uint8_t* data_start = data.data();
   const uint8_t* data_end = data_start + data.size();
-  for (auto& entry : dex_deps_) {
-    DecodeStringVector(&data_start, data_end, &entry.second->strings_);
-    DecodeSet(&data_start, data_end, &entry.second->assignable_types_);
-    DecodeSet(&data_start, data_end, &entry.second->unassignable_types_);
-    DecodeSet(&data_start, data_end, &entry.second->classes_);
-    DecodeSet(&data_start, data_end, &entry.second->fields_);
-    DecodeSet(&data_start, data_end, &entry.second->direct_methods_);
-    DecodeSet(&data_start, data_end, &entry.second->virtual_methods_);
-    DecodeSet(&data_start, data_end, &entry.second->interface_methods_);
-    DecodeUint16Vector(&data_start, data_end, &entry.second->unverified_classes_);
+  for (const DexFile* dex_file : dex_files) {
+    DexFileDeps* deps = GetDexFileDeps(*dex_file);
+    DecodeStringVector(&data_start, data_end, &deps->strings_);
+    DecodeSet(&data_start, data_end, &deps->assignable_types_);
+    DecodeSet(&data_start, data_end, &deps->unassignable_types_);
+    DecodeSet(&data_start, data_end, &deps->classes_);
+    DecodeSet(&data_start, data_end, &deps->fields_);
+    DecodeSet(&data_start, data_end, &deps->direct_methods_);
+    DecodeSet(&data_start, data_end, &deps->virtual_methods_);
+    DecodeSet(&data_start, data_end, &deps->interface_methods_);
+    DecodeUint16Vector(&data_start, data_end, &deps->unverified_classes_);
   }
   CHECK_LE(data_start, data_end);
 }
@@ -504,5 +519,93 @@
          (unverified_classes_ == rhs.unverified_classes_);
 }
 
+void VerifierDeps::Dump(VariableIndentationOutputStream* vios) const {
+  for (const auto& dep : dex_deps_) {
+    const DexFile& dex_file = *dep.first;
+    vios->Stream()
+        << "Dependencies of "
+        << dex_file.GetLocation()
+        << ":\n";
+
+    ScopedIndentation indent(vios);
+
+    for (const std::string& str : dep.second->strings_) {
+      vios->Stream() << "Extra string: " << str << "\n";
+    }
+
+    for (const TypeAssignability& entry : dep.second->assignable_types_) {
+      vios->Stream()
+        << GetStringFromId(dex_file, entry.GetSource())
+        << " must be assignable to "
+        << GetStringFromId(dex_file, entry.GetDestination())
+        << "\n";
+    }
+
+    for (const TypeAssignability& entry : dep.second->unassignable_types_) {
+      vios->Stream()
+        << GetStringFromId(dex_file, entry.GetSource())
+        << " must not be assignable to "
+        << GetStringFromId(dex_file, entry.GetDestination())
+        << "\n";
+    }
+
+    for (const ClassResolution& entry : dep.second->classes_) {
+      vios->Stream()
+          << dex_file.StringByTypeIdx(entry.GetDexTypeIndex())
+          << (entry.IsResolved() ? " must be resolved " : "must not be resolved ")
+          << " with access flags " << std::hex << entry.GetAccessFlags() << std::dec
+          << "\n";
+    }
+
+    for (const FieldResolution& entry : dep.second->fields_) {
+      const DexFile::FieldId& field_id = dex_file.GetFieldId(entry.GetDexFieldIndex());
+      vios->Stream()
+          << dex_file.GetFieldDeclaringClassDescriptor(field_id) << "->"
+          << dex_file.GetFieldName(field_id) << ":"
+          << dex_file.GetFieldTypeDescriptor(field_id)
+          << " is expected to be ";
+      if (!entry.IsResolved()) {
+        vios->Stream() << "unresolved\n";
+      } else {
+        vios->Stream()
+          << "in class "
+          << GetStringFromId(dex_file, entry.GetDeclaringClassIndex())
+          << ", and have the access flags " << std::hex << entry.GetAccessFlags() << std::dec
+          << "\n";
+      }
+    }
+
+    for (const auto& entry :
+            { std::make_pair(kDirectMethodResolution, dep.second->direct_methods_),
+              std::make_pair(kVirtualMethodResolution, dep.second->virtual_methods_),
+              std::make_pair(kInterfaceMethodResolution, dep.second->interface_methods_) }) {
+      for (const MethodResolution& method : entry.second) {
+        const DexFile::MethodId& method_id = dex_file.GetMethodId(method.GetDexMethodIndex());
+        vios->Stream()
+            << dex_file.GetMethodDeclaringClassDescriptor(method_id) << "->"
+            << dex_file.GetMethodName(method_id)
+            << dex_file.GetMethodSignature(method_id).ToString()
+            << " is expected to be ";
+        if (!method.IsResolved()) {
+          vios->Stream() << "unresolved\n";
+        } else {
+          vios->Stream()
+            << "in class "
+            << GetStringFromId(dex_file, method.GetDeclaringClassIndex())
+            << ", have the access flags " << std::hex << method.GetAccessFlags() << std::dec
+            << ", and be of kind " << entry.first
+            << "\n";
+        }
+      }
+    }
+
+    for (uint16_t type_index : dep.second->unverified_classes_) {
+      vios->Stream()
+          << dex_file.StringByTypeIdx(type_index)
+          << " is expected to be verified at runtime\n";
+    }
+  }
+}
+
 }  // namespace verifier
 }  // namespace art
diff --git a/runtime/verifier/verifier_deps.h b/runtime/verifier/verifier_deps.h
index 9d2622d..fab4323 100644
--- a/runtime/verifier/verifier_deps.h
+++ b/runtime/verifier/verifier_deps.h
@@ -25,6 +25,7 @@
 #include "art_method.h"
 #include "base/array_ref.h"
 #include "base/mutex.h"
+#include "indenter.h"
 #include "method_resolution_kind.h"
 #include "method_verifier.h"  // For MethodVerifier::FailureKind.
 #include "obj_ptr.h"
@@ -50,6 +51,10 @@
   explicit VerifierDeps(const std::vector<const DexFile*>& dex_files)
       REQUIRES(!Locks::verifier_deps_lock_);
 
+  VerifierDeps(const std::vector<const DexFile*>& dex_files,
+               ArrayRef<const uint8_t> data)
+      REQUIRES(!Locks::verifier_deps_lock_);
+
   // Record the verification status of the class at `type_idx`.
   static void MaybeRecordVerificationStatus(const DexFile& dex_file,
                                             uint16_t type_idx,
@@ -94,16 +99,19 @@
       REQUIRES(!Locks::verifier_deps_lock_);
 
   // Serialize the recorded dependencies and store the data into `buffer`.
-  void Encode(std::vector<uint8_t>* buffer) const
+  // `dex_files` provides the order of the dex files in which the dependencies
+  // should be emitted.
+  void Encode(const std::vector<const DexFile*>& dex_files, std::vector<uint8_t>* buffer) const
       REQUIRES(!Locks::verifier_deps_lock_);
 
+  // NO_THREAD_SAFETY_ANALYSIS as Dump iterates over dex_deps_, which is guarded by
+  // verifier_deps_lock_, but we expect Dump to be called once the deps collection is done.
+  void Dump(VariableIndentationOutputStream* vios) const
+      NO_THREAD_SAFETY_ANALYSIS;
+
  private:
   static constexpr uint16_t kUnresolvedMarker = static_cast<uint16_t>(-1);
 
-  // Only used in tests to reconstruct the data structure from serialized data.
-  VerifierDeps(const std::vector<const DexFile*>& dex_files, ArrayRef<uint8_t> data)
-      REQUIRES(!Locks::verifier_deps_lock_);
-
   using ClassResolutionBase = std::tuple<uint32_t, uint16_t>;
   struct ClassResolution : public ClassResolutionBase {
     ClassResolution() = default;
@@ -185,9 +193,12 @@
   DexFileDeps* GetDexFileDeps(const DexFile& dex_file)
       NO_THREAD_SAFETY_ANALYSIS;
 
+  const DexFileDeps* GetDexFileDeps(const DexFile& dex_file) const
+      NO_THREAD_SAFETY_ANALYSIS;
+
   // Returns true if `klass` is null or not defined in any of dex files which
   // were reported as being compiled.
-  bool IsInClassPath(ObjPtr<mirror::Class> klass)
+  bool IsInClassPath(ObjPtr<mirror::Class> klass) const
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   // Returns the index of `str`. If it is defined in `dex_file_`, this is the dex
@@ -198,13 +209,13 @@
       REQUIRES(Locks::verifier_deps_lock_);
 
   // Returns the string represented by `id`.
-  std::string GetStringFromId(const DexFile& dex_file, uint32_t string_id)
+  std::string GetStringFromId(const DexFile& dex_file, uint32_t string_id) const
       REQUIRES(Locks::verifier_deps_lock_);
 
   // Returns the bytecode access flags of `element` (bottom 16 bits), or
   // `kUnresolvedMarker` if `element` is null.
   template <typename T>
-  uint16_t GetAccessFlags(T* element)
+  static uint16_t GetAccessFlags(T* element)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   // Returns a string ID of the descriptor of the declaring class of `element`,
@@ -251,6 +262,7 @@
   friend class VerifierDepsTest;
   ART_FRIEND_TEST(VerifierDepsTest, StringToId);
   ART_FRIEND_TEST(VerifierDepsTest, EncodeDecode);
+  ART_FRIEND_TEST(VerifierDepsTest, EncodeDecodeMulti);
 };
 
 }  // namespace verifier
diff --git a/runtime/well_known_classes.cc b/runtime/well_known_classes.cc
index 153c7ef..2797d85 100644
--- a/runtime/well_known_classes.cc
+++ b/runtime/well_known_classes.cc
@@ -34,6 +34,8 @@
 jclass WellKnownClasses::com_android_dex_Dex;
 jclass WellKnownClasses::dalvik_annotation_optimization_CriticalNative;
 jclass WellKnownClasses::dalvik_annotation_optimization_FastNative;
+jclass WellKnownClasses::dalvik_system_BaseDexClassLoader;
+jclass WellKnownClasses::dalvik_system_DexClassLoader;
 jclass WellKnownClasses::dalvik_system_DexFile;
 jclass WellKnownClasses::dalvik_system_DexPathList;
 jclass WellKnownClasses::dalvik_system_DexPathList__Element;
@@ -108,7 +110,7 @@
 
 jfieldID WellKnownClasses::dalvik_system_DexFile_cookie;
 jfieldID WellKnownClasses::dalvik_system_DexFile_fileName;
-jfieldID WellKnownClasses::dalvik_system_PathClassLoader_pathList;
+jfieldID WellKnownClasses::dalvik_system_BaseDexClassLoader_pathList;
 jfieldID WellKnownClasses::dalvik_system_DexPathList_dexElements;
 jfieldID WellKnownClasses::dalvik_system_DexPathList__Element_dexFile;
 jfieldID WellKnownClasses::java_lang_Thread_daemon;
@@ -264,6 +266,8 @@
   dalvik_annotation_optimization_CriticalNative =
       CacheClass(env, "dalvik/annotation/optimization/CriticalNative");
   dalvik_annotation_optimization_FastNative = CacheClass(env, "dalvik/annotation/optimization/FastNative");
+  dalvik_system_BaseDexClassLoader = CacheClass(env, "dalvik/system/BaseDexClassLoader");
+  dalvik_system_DexClassLoader = CacheClass(env, "dalvik/system/DexClassLoader");
   dalvik_system_DexFile = CacheClass(env, "dalvik/system/DexFile");
   dalvik_system_DexPathList = CacheClass(env, "dalvik/system/DexPathList");
   dalvik_system_DexPathList__Element = CacheClass(env, "dalvik/system/DexPathList$Element");
@@ -332,9 +336,9 @@
   org_apache_harmony_dalvik_ddmc_DdmServer_broadcast = CacheMethod(env, org_apache_harmony_dalvik_ddmc_DdmServer, true, "broadcast", "(I)V");
   org_apache_harmony_dalvik_ddmc_DdmServer_dispatch = CacheMethod(env, org_apache_harmony_dalvik_ddmc_DdmServer, true, "dispatch", "(I[BII)Lorg/apache/harmony/dalvik/ddmc/Chunk;");
 
+  dalvik_system_BaseDexClassLoader_pathList = CacheField(env, dalvik_system_BaseDexClassLoader, false, "pathList", "Ldalvik/system/DexPathList;");
   dalvik_system_DexFile_cookie = CacheField(env, dalvik_system_DexFile, false, "mCookie", "Ljava/lang/Object;");
   dalvik_system_DexFile_fileName = CacheField(env, dalvik_system_DexFile, false, "mFileName", "Ljava/lang/String;");
-  dalvik_system_PathClassLoader_pathList = CacheField(env, dalvik_system_PathClassLoader, false, "pathList", "Ldalvik/system/DexPathList;");
   dalvik_system_DexPathList_dexElements = CacheField(env, dalvik_system_DexPathList, false, "dexElements", "[Ldalvik/system/DexPathList$Element;");
   dalvik_system_DexPathList__Element_dexFile = CacheField(env, dalvik_system_DexPathList__Element, false, "dexFile", "Ldalvik/system/DexFile;");
   java_lang_Thread_daemon = CacheField(env, java_lang_Thread, false, "daemon", "Z");
diff --git a/runtime/well_known_classes.h b/runtime/well_known_classes.h
index 2fb5bb4..227996a 100644
--- a/runtime/well_known_classes.h
+++ b/runtime/well_known_classes.h
@@ -47,6 +47,8 @@
   static jclass com_android_dex_Dex;
   static jclass dalvik_annotation_optimization_CriticalNative;
   static jclass dalvik_annotation_optimization_FastNative;
+  static jclass dalvik_system_BaseDexClassLoader;
+  static jclass dalvik_system_DexClassLoader;
   static jclass dalvik_system_DexFile;
   static jclass dalvik_system_DexPathList;
   static jclass dalvik_system_DexPathList__Element;
@@ -119,11 +121,11 @@
   static jmethodID org_apache_harmony_dalvik_ddmc_DdmServer_broadcast;
   static jmethodID org_apache_harmony_dalvik_ddmc_DdmServer_dispatch;
 
+  static jfieldID dalvik_system_BaseDexClassLoader_pathList;
   static jfieldID dalvik_system_DexFile_cookie;
   static jfieldID dalvik_system_DexFile_fileName;
   static jfieldID dalvik_system_DexPathList_dexElements;
   static jfieldID dalvik_system_DexPathList__Element_dexFile;
-  static jfieldID dalvik_system_PathClassLoader_pathList;
   static jfieldID java_lang_reflect_Executable_artMethod;
   static jfieldID java_lang_reflect_Proxy_h;
   static jfieldID java_lang_Thread_daemon;
diff --git a/test/910-methods/expected.txt b/test/910-methods/expected.txt
index b305d0f..9a74799 100644
--- a/test/910-methods/expected.txt
+++ b/test/910-methods/expected.txt
@@ -1,4 +1,15 @@
 [toString, ()Ljava/lang/String;, null]
+class java.lang.Object
+1
 [charAt, (I)C, null]
+class java.lang.String
+257
 [sqrt, (D)D, null]
+class java.lang.Math
+265
 [add, (Ljava/lang/Object;)Z, null]
+interface java.util.List
+1025
+[run, ()V, null]
+class $Proxy0
+17
diff --git a/test/910-methods/methods.cc b/test/910-methods/methods.cc
index fa910c1..cc6ad67 100644
--- a/test/910-methods/methods.cc
+++ b/test/910-methods/methods.cc
@@ -75,6 +75,38 @@
   return ret;
 }
 
+extern "C" JNIEXPORT jclass JNICALL Java_Main_getMethodDeclaringClass(
+    JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jobject method) {
+  jmethodID id = env->FromReflectedMethod(method);
+
+  jclass declaring_class;
+  jvmtiError result = jvmti_env->GetMethodDeclaringClass(id, &declaring_class);
+  if (result != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result, &err);
+    printf("Failure running GetMethodDeclaringClass: %s\n", err);
+    return nullptr;
+  }
+
+  return declaring_class;
+}
+
+extern "C" JNIEXPORT jint JNICALL Java_Main_getMethodModifiers(
+    JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jobject method) {
+  jmethodID id = env->FromReflectedMethod(method);
+
+  jint modifiers;
+  jvmtiError result = jvmti_env->GetMethodModifiers(id, &modifiers);
+  if (result != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result, &err);
+    printf("Failure running GetMethodModifiers: %s\n", err);
+    return 0;
+  }
+
+  return modifiers;
+}
+
 // Don't do anything
 jint OnLoad(JavaVM* vm,
             char* options ATTRIBUTE_UNUSED,
diff --git a/test/910-methods/src/Main.java b/test/910-methods/src/Main.java
index 1af30ba..3459134 100644
--- a/test/910-methods/src/Main.java
+++ b/test/910-methods/src/Main.java
@@ -15,6 +15,7 @@
  */
 
 import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
 import java.util.Arrays;
 
 public class Main {
@@ -29,15 +30,47 @@
     testMethod("java.lang.String", "charAt", int.class);
     testMethod("java.lang.Math", "sqrt", double.class);
     testMethod("java.util.List", "add", Object.class);
+
+    testMethod(getProxyClass(), "run");
+  }
+
+  private static Class<?> proxyClass = null;
+
+  private static Class<?> getProxyClass() throws Exception {
+    if (proxyClass != null) {
+      return proxyClass;
+    }
+
+    proxyClass = Proxy.getProxyClass(Main.class.getClassLoader(), new Class[] { Runnable.class });
+    return proxyClass;
   }
 
   private static void testMethod(String className, String methodName, Class<?>... types)
       throws Exception {
     Class<?> base = Class.forName(className);
+    testMethod(base, methodName, types);
+  }
+
+  private static void testMethod(Class<?> base, String methodName, Class<?>... types)
+      throws Exception {
     Method m = base.getDeclaredMethod(methodName, types);
     String[] result = getMethodName(m);
     System.out.println(Arrays.toString(result));
+
+    Class<?> declClass = getMethodDeclaringClass(m);
+    if (base != declClass) {
+      throw new RuntimeException("Declaring class not equal: " + base + " vs " + declClass);
+    }
+    System.out.println(declClass);
+
+    int modifiers = getMethodModifiers(m);
+    if (modifiers != m.getModifiers()) {
+      throw new RuntimeException("Modifiers not equal: " + m.getModifiers() + " vs " + modifiers);
+    }
+    System.out.println(modifiers);
   }
 
   private static native String[] getMethodName(Method m);
+  private static native Class<?> getMethodDeclaringClass(Method m);
+  private static native int getMethodModifiers(Method m);
 }
diff --git a/test/911-get-stack-trace/build b/test/911-get-stack-trace/build
new file mode 100755
index 0000000..898e2e5
--- /dev/null
+++ b/test/911-get-stack-trace/build
@@ -0,0 +1,17 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# 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.
+
+./default-build "$@" --experimental agents
diff --git a/test/911-get-stack-trace/expected.txt b/test/911-get-stack-trace/expected.txt
new file mode 100644
index 0000000..20bab78
--- /dev/null
+++ b/test/911-get-stack-trace/expected.txt
@@ -0,0 +1,208 @@
+###################
+### Same thread ###
+###################
+From top
+---------
+ getStackTrace (Ljava/lang/Thread;II)[Ljava/lang/String;
+ print (Ljava/lang/Thread;II)V
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ doTest ()V
+ main ([Ljava/lang/String;)V
+---------
+ print (Ljava/lang/Thread;II)V
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ doTest ()V
+ main ([Ljava/lang/String;)V
+---------
+ getStackTrace (Ljava/lang/Thread;II)[Ljava/lang/String;
+ print (Ljava/lang/Thread;II)V
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+---------
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+From bottom
+---------
+ main ([Ljava/lang/String;)V
+---------
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ doTest ()V
+ main ([Ljava/lang/String;)V
+---------
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+
+################################
+### Other thread (suspended) ###
+################################
+From top
+---------
+ wait ()V
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ run ()V
+---------
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ run ()V
+---------
+ wait ()V
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+---------
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+From bottom
+---------
+ run ()V
+---------
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ run ()V
+---------
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+
+###########################
+### Other thread (live) ###
+###########################
+From top
+---------
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ run ()V
+---------
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ run ()V
+---------
+ printOrWait (IILMain$ControlData;)V
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+---------
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+From bottom
+---------
+ run ()V
+---------
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ run ()V
+---------
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
+ foo (IIILMain$ControlData;)I
+ baz (IIILMain$ControlData;)Ljava/lang/Object;
+ bar (IIILMain$ControlData;)J
diff --git a/test/911-get-stack-trace/info.txt b/test/911-get-stack-trace/info.txt
new file mode 100644
index 0000000..875a5f6
--- /dev/null
+++ b/test/911-get-stack-trace/info.txt
@@ -0,0 +1 @@
+Tests basic functions in the jvmti plugin.
diff --git a/test/911-get-stack-trace/run b/test/911-get-stack-trace/run
new file mode 100755
index 0000000..43fc325
--- /dev/null
+++ b/test/911-get-stack-trace/run
@@ -0,0 +1,43 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+plugin=libopenjdkjvmtid.so
+agent=libtiagentd.so
+lib=tiagentd
+if  [[ "$@" == *"-O"* ]]; then
+  agent=libtiagent.so
+  plugin=libopenjdkjvmti.so
+  lib=tiagent
+fi
+
+if [[ "$@" == *"--jvm"* ]]; then
+  arg="jvm"
+else
+  arg="art"
+fi
+
+if [[ "$@" != *"--debuggable"* ]]; then
+  other_args=" -Xcompiler-option --debuggable "
+else
+  other_args=""
+fi
+
+./default-run "$@" --experimental agents \
+                   --experimental runtime-plugins \
+                   --runtime-option -agentpath:${agent}=911-get-stack-trace,${arg} \
+                   --android-runtime-option -Xplugin:${plugin} \
+                   ${other_args} \
+                   --args ${lib}
diff --git a/test/911-get-stack-trace/src/Main.java b/test/911-get-stack-trace/src/Main.java
new file mode 100644
index 0000000..df4501d
--- /dev/null
+++ b/test/911-get-stack-trace/src/Main.java
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+import java.util.Arrays;
+import java.util.concurrent.CountDownLatch;
+
+public class Main {
+  public static void main(String[] args) throws Exception {
+    System.loadLibrary(args[1]);
+
+    doTest();
+    doTestOtherThreadWait();
+    doTestOtherThreadBusyLoop();
+  }
+
+  public static void doTest() throws Exception {
+    System.out.println("###################");
+    System.out.println("### Same thread ###");
+    System.out.println("###################");
+    System.out.println("From top");
+    Recurse.foo(4, 0, 25, null);
+    Recurse.foo(4, 1, 25, null);
+    Recurse.foo(4, 0, 5, null);
+    Recurse.foo(4, 2, 5, null);
+
+    System.out.println("From bottom");
+    Recurse.foo(4, -1, 25, null);
+    Recurse.foo(4, -5, 5, null);
+    Recurse.foo(4, -7, 5, null);
+  }
+
+  public static void doTestOtherThreadWait() throws Exception {
+    System.out.println();
+    System.out.println("################################");
+    System.out.println("### Other thread (suspended) ###");
+    System.out.println("################################");
+    final ControlData data = new ControlData();
+    data.waitFor = new Object();
+    Thread t = new Thread() {
+      public void run() {
+        Recurse.foo(4, 0, 0, data);
+      }
+    };
+    t.start();
+    data.reached.await();
+    Thread.yield();
+    Thread.sleep(500);  // A little bit of time...
+
+    System.out.println("From top");
+    print(t, 0, 25);
+    print(t, 1, 25);
+    print(t, 0, 5);
+    print(t, 2, 5);
+
+    System.out.println("From bottom");
+    print(t, -1, 25);
+    print(t, -5, 5);
+    print(t, -7, 5);
+
+    // Let the thread make progress and die.
+    synchronized(data.waitFor) {
+      data.waitFor.notifyAll();
+    }
+    t.join();
+  }
+
+  public static void doTestOtherThreadBusyLoop() throws Exception {
+    System.out.println();
+    System.out.println("###########################");
+    System.out.println("### Other thread (live) ###");
+    System.out.println("###########################");
+    final ControlData data = new ControlData();
+    Thread t = new Thread() {
+      public void run() {
+        Recurse.foo(4, 0, 0, data);
+      }
+    };
+    t.start();
+    data.reached.await();
+    Thread.yield();
+    Thread.sleep(500);  // A little bit of time...
+
+    System.out.println("From top");
+    print(t, 0, 25);
+    print(t, 1, 25);
+    print(t, 0, 5);
+    print(t, 2, 5);
+
+    System.out.println("From bottom");
+    print(t, -1, 25);
+    print(t, -5, 5);
+    print(t, -7, 5);
+
+    // Let the thread stop looping and die.
+    data.stop = true;
+    t.join();
+  }
+
+  public static void print(String[] stack) {
+    System.out.println("---------");
+    for (int i = 0; i < stack.length; i += 2) {
+      System.out.print(' ');
+      System.out.print(stack[i]);
+      System.out.print(' ');
+      System.out.println(stack[i + 1]);
+    }
+  }
+
+  public static void print(Thread t, int start, int max) {
+    print(getStackTrace(t, start, max));
+  }
+
+  // Wrap generated stack traces into a class to separate them nicely.
+  public static class Recurse {
+
+    public static int foo(int x, int start, int max, ControlData data) {
+      bar(x, start, max, data);
+      return 0;
+    }
+
+    private static long bar(int x, int start, int max, ControlData data) {
+      baz(x, start, max, data);
+      return 0;
+    }
+
+    private static Object baz(int x, int start, int max, ControlData data) {
+      if (x == 0) {
+        printOrWait(start, max, data);
+      } else {
+        foo(x - 1, start, max, data);
+      }
+      return null;
+    }
+
+    private static void printOrWait(int start, int max, ControlData data) {
+      if (data == null) {
+        print(Thread.currentThread(), start, max);
+      } else {
+        if (data.waitFor != null) {
+          synchronized (data.waitFor) {
+            data.reached.countDown();
+            try {
+              data.waitFor.wait();  // Use wait() as it doesn't have a "hidden" Java call-graph.
+            } catch (Throwable t) {
+              throw new RuntimeException(t);
+            }
+          }
+        } else {
+          data.reached.countDown();
+          while (!data.stop) {
+            // Busy-loop.
+          }
+        }
+      }
+    }
+  }
+
+  public static class ControlData {
+    CountDownLatch reached = new CountDownLatch(1);
+    Object waitFor = null;
+    volatile boolean stop = false;
+  }
+
+  public static native String[] getStackTrace(Thread thread, int start, int max);
+}
diff --git a/test/911-get-stack-trace/stack_trace.cc b/test/911-get-stack-trace/stack_trace.cc
new file mode 100644
index 0000000..da649cf
--- /dev/null
+++ b/test/911-get-stack-trace/stack_trace.cc
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "stack_trace.h"
+
+#include <memory>
+#include <stdio.h>
+
+#include "base/logging.h"
+#include "jni.h"
+#include "openjdkjvmti/jvmti.h"
+#include "ScopedLocalRef.h"
+#include "ti-agent/common_load.h"
+
+namespace art {
+namespace Test911GetStackTrace {
+
+extern "C" JNIEXPORT jobjectArray JNICALL Java_Main_getStackTrace(
+    JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jthread thread, jint start, jint max) {
+  std::unique_ptr<jvmtiFrameInfo[]> frames(new jvmtiFrameInfo[max]);
+
+  jint count;
+  jvmtiError result = jvmti_env->GetStackTrace(thread, start, max, frames.get(), &count);
+  if (result != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result, &err);
+    printf("Failure running GetStackTrace: %s\n", err);
+    return nullptr;
+  }
+
+  ScopedLocalRef<jclass> obj_class(env, env->FindClass("java/lang/String"));
+  if (obj_class.get() == nullptr) {
+    return nullptr;
+  }
+
+  jobjectArray ret = env->NewObjectArray(2 * count, obj_class.get(), nullptr);
+  if (ret == nullptr) {
+    return ret;
+  }
+
+  for (size_t i = 0; i < static_cast<size_t>(count); ++i) {
+    char* name;
+    char* sig;
+    char* gen;
+    jvmtiError result2 = jvmti_env->GetMethodName(frames[i].method, &name, &sig, &gen);
+    if (result2 != JVMTI_ERROR_NONE) {
+      char* err;
+      jvmti_env->GetErrorName(result, &err);
+      printf("Failure running GetMethodName: %s\n", err);
+      return nullptr;
+    }
+    ScopedLocalRef<jstring> trace_name(env, name == nullptr ? nullptr : env->NewStringUTF(name));
+    ScopedLocalRef<jstring> trace_sig(env, sig == nullptr ? nullptr : env->NewStringUTF(sig));
+    env->SetObjectArrayElement(ret, static_cast<jint>(2 * i), trace_name.get());
+    env->SetObjectArrayElement(ret, static_cast<jint>(2 * i + 1), trace_sig.get());
+
+    if (name != nullptr) {
+      jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(name));
+    }
+    if (sig != nullptr) {
+      jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(sig));
+    }
+    if (gen != nullptr) {
+      jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(gen));
+    }
+  }
+
+  return ret;
+}
+
+// Don't do anything
+jint OnLoad(JavaVM* vm,
+            char* options ATTRIBUTE_UNUSED,
+            void* reserved ATTRIBUTE_UNUSED) {
+  if (vm->GetEnv(reinterpret_cast<void**>(&jvmti_env), JVMTI_VERSION_1_0)) {
+    printf("Unable to get jvmti env!\n");
+    return 1;
+  }
+  return 0;
+}
+
+}  // namespace Test911GetStackTrace
+}  // namespace art
diff --git a/test/911-get-stack-trace/stack_trace.h b/test/911-get-stack-trace/stack_trace.h
new file mode 100644
index 0000000..eba2a91
--- /dev/null
+++ b/test/911-get-stack-trace/stack_trace.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef ART_TEST_911_GET_STACK_TRACE_STACK_TRACE_H_
+#define ART_TEST_911_GET_STACK_TRACE_STACK_TRACE_H_
+
+#include <jni.h>
+
+namespace art {
+namespace Test911GetStackTrace {
+
+jint OnLoad(JavaVM* vm, char* options, void* reserved);
+
+}  // namespace Test911GetStackTrace
+}  // namespace art
+
+#endif  // ART_TEST_911_GET_STACK_TRACE_STACK_TRACE_H_
diff --git a/test/912-classes/build b/test/912-classes/build
new file mode 100755
index 0000000..898e2e5
--- /dev/null
+++ b/test/912-classes/build
@@ -0,0 +1,17 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# 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.
+
+./default-build "$@" --experimental agents
diff --git a/test/912-classes/classes.cc b/test/912-classes/classes.cc
new file mode 100644
index 0000000..4bf329c
--- /dev/null
+++ b/test/912-classes/classes.cc
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "classes.h"
+
+#include <stdio.h>
+
+#include "base/macros.h"
+#include "jni.h"
+#include "openjdkjvmti/jvmti.h"
+#include "ScopedLocalRef.h"
+
+#include "ti-agent/common_load.h"
+
+namespace art {
+namespace Test912Classes {
+
+extern "C" JNIEXPORT jobjectArray JNICALL Java_Main_getClassSignature(
+    JNIEnv* env, jclass Main_klass ATTRIBUTE_UNUSED, jclass klass) {
+  char* sig;
+  char* gen;
+  jvmtiError result = jvmti_env->GetClassSignature(klass, &sig, &gen);
+  if (result != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(result, &err);
+    printf("Failure running GetClassSignature: %s\n", err);
+    return nullptr;
+  }
+
+  ScopedLocalRef<jclass> obj_class(env, env->FindClass("java/lang/String"));
+  if (obj_class.get() == nullptr) {
+    return nullptr;
+  }
+
+  jobjectArray ret = env->NewObjectArray(2, obj_class.get(), nullptr);
+  if (ret == nullptr) {
+    return ret;
+  }
+
+  ScopedLocalRef<jstring> sig_str(env, sig == nullptr ? nullptr : env->NewStringUTF(sig));
+  ScopedLocalRef<jstring> gen_str(env, gen == nullptr ? nullptr : env->NewStringUTF(gen));
+
+  env->SetObjectArrayElement(ret, 0, sig_str.get());
+  env->SetObjectArrayElement(ret, 1, gen_str.get());
+
+  // Need to deallocate the strings.
+  if (sig != nullptr) {
+    jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(sig));
+  }
+  if (gen != nullptr) {
+    jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(gen));
+  }
+
+  return ret;
+}
+
+// Don't do anything
+jint OnLoad(JavaVM* vm,
+            char* options ATTRIBUTE_UNUSED,
+            void* reserved ATTRIBUTE_UNUSED) {
+  if (vm->GetEnv(reinterpret_cast<void**>(&jvmti_env), JVMTI_VERSION_1_0)) {
+    printf("Unable to get jvmti env!\n");
+    return 1;
+  }
+  return 0;
+}
+
+}  // namespace Test912Classes
+}  // namespace art
diff --git a/test/912-classes/classes.h b/test/912-classes/classes.h
new file mode 100644
index 0000000..62fb203
--- /dev/null
+++ b/test/912-classes/classes.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef ART_TEST_912_CLASSES_CLASSES_H_
+#define ART_TEST_912_CLASSES_CLASSES_H_
+
+#include <jni.h>
+
+namespace art {
+namespace Test912Classes {
+
+jint OnLoad(JavaVM* vm, char* options, void* reserved);
+
+}  // namespace Test912Classes
+}  // namespace art
+
+#endif  // ART_TEST_912_CLASSES_CLASSES_H_
diff --git a/test/912-classes/expected.txt b/test/912-classes/expected.txt
new file mode 100644
index 0000000..71b22f4
--- /dev/null
+++ b/test/912-classes/expected.txt
@@ -0,0 +1,7 @@
+[Ljava/lang/Object;, null]
+[Ljava/lang/String;, null]
+[Ljava/lang/Math;, null]
+[Ljava/util/List;, null]
+[L$Proxy0;, null]
+[I, null]
+[[D, null]
diff --git a/test/912-classes/info.txt b/test/912-classes/info.txt
new file mode 100644
index 0000000..875a5f6
--- /dev/null
+++ b/test/912-classes/info.txt
@@ -0,0 +1 @@
+Tests basic functions in the jvmti plugin.
diff --git a/test/912-classes/run b/test/912-classes/run
new file mode 100755
index 0000000..64bbb98
--- /dev/null
+++ b/test/912-classes/run
@@ -0,0 +1,43 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+plugin=libopenjdkjvmtid.so
+agent=libtiagentd.so
+lib=tiagentd
+if  [[ "$@" == *"-O"* ]]; then
+  agent=libtiagent.so
+  plugin=libopenjdkjvmti.so
+  lib=tiagent
+fi
+
+if [[ "$@" == *"--jvm"* ]]; then
+  arg="jvm"
+else
+  arg="art"
+fi
+
+if [[ "$@" != *"--debuggable"* ]]; then
+  other_args=" -Xcompiler-option --debuggable "
+else
+  other_args=""
+fi
+
+./default-run "$@" --experimental agents \
+                   --experimental runtime-plugins \
+                   --runtime-option -agentpath:${agent}=912-classes,${arg} \
+                   --android-runtime-option -Xplugin:${plugin} \
+                   ${other_args} \
+                   --args ${lib}
diff --git a/test/912-classes/src/Main.java b/test/912-classes/src/Main.java
new file mode 100644
index 0000000..025584e
--- /dev/null
+++ b/test/912-classes/src/Main.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+import java.lang.reflect.Proxy;
+import java.util.Arrays;
+
+public class Main {
+  public static void main(String[] args) throws Exception {
+    System.loadLibrary(args[1]);
+
+    doTest();
+  }
+
+  public static void doTest() throws Exception {
+    testClass("java.lang.Object");
+    testClass("java.lang.String");
+    testClass("java.lang.Math");
+    testClass("java.util.List");
+
+    testClass(getProxyClass());
+
+    testClass(int.class);
+    testClass(double[].class);
+  }
+
+  private static Class<?> proxyClass = null;
+
+  private static Class<?> getProxyClass() throws Exception {
+    if (proxyClass != null) {
+      return proxyClass;
+    }
+
+    proxyClass = Proxy.getProxyClass(Main.class.getClassLoader(), new Class[] { Runnable.class });
+    return proxyClass;
+  }
+
+  private static void testClass(String className) throws Exception {
+    Class<?> base = Class.forName(className);
+    testClass(base);
+  }
+
+  private static void testClass(Class<?> base) throws Exception {
+    String[] result = getClassSignature(base);
+    System.out.println(Arrays.toString(result));
+  }
+
+  private static native String[] getClassSignature(Class<?> c);
+}
diff --git a/test/913-heaps/build b/test/913-heaps/build
new file mode 100755
index 0000000..898e2e5
--- /dev/null
+++ b/test/913-heaps/build
@@ -0,0 +1,17 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# 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.
+
+./default-build "$@" --experimental agents
diff --git a/test/913-heaps/expected.txt b/test/913-heaps/expected.txt
new file mode 100644
index 0000000..a127f4e
--- /dev/null
+++ b/test/913-heaps/expected.txt
@@ -0,0 +1,4 @@
+---
+false false
+---
+true true
diff --git a/test/913-heaps/heaps.cc b/test/913-heaps/heaps.cc
new file mode 100644
index 0000000..437779a
--- /dev/null
+++ b/test/913-heaps/heaps.cc
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "heaps.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "base/macros.h"
+#include "jni.h"
+#include "openjdkjvmti/jvmti.h"
+
+#include "ti-agent/common_load.h"
+
+namespace art {
+namespace Test913Heaps {
+
+extern "C" JNIEXPORT void JNICALL Java_Main_forceGarbageCollection(JNIEnv* env ATTRIBUTE_UNUSED,
+                                                                   jclass klass ATTRIBUTE_UNUSED) {
+  jvmtiError ret = jvmti_env->ForceGarbageCollection();
+  if (ret != JVMTI_ERROR_NONE) {
+    char* err;
+    jvmti_env->GetErrorName(ret, &err);
+    printf("Error forcing a garbage collection: %s\n", err);
+  }
+}
+
+// Don't do anything
+jint OnLoad(JavaVM* vm,
+            char* options ATTRIBUTE_UNUSED,
+            void* reserved ATTRIBUTE_UNUSED) {
+  if (vm->GetEnv(reinterpret_cast<void**>(&jvmti_env), JVMTI_VERSION_1_0)) {
+    printf("Unable to get jvmti env!\n");
+    return 1;
+  }
+  return 0;
+}
+
+}  // namespace Test913Heaps
+}  // namespace art
diff --git a/test/913-heaps/heaps.h b/test/913-heaps/heaps.h
new file mode 100644
index 0000000..bd828ac
--- /dev/null
+++ b/test/913-heaps/heaps.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef ART_TEST_913_HEAPS_HEAPS_H_
+#define ART_TEST_913_HEAPS_HEAPS_H_
+
+#include <jni.h>
+
+namespace art {
+namespace Test913Heaps {
+
+jint OnLoad(JavaVM* vm, char* options, void* reserved);
+
+}  // namespace Test913Heaps
+}  // namespace art
+
+#endif  // ART_TEST_913_HEAPS_HEAPS_H_
diff --git a/test/913-heaps/info.txt b/test/913-heaps/info.txt
new file mode 100644
index 0000000..875a5f6
--- /dev/null
+++ b/test/913-heaps/info.txt
@@ -0,0 +1 @@
+Tests basic functions in the jvmti plugin.
diff --git a/test/913-heaps/run b/test/913-heaps/run
new file mode 100755
index 0000000..7bd8cbd
--- /dev/null
+++ b/test/913-heaps/run
@@ -0,0 +1,43 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# 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.
+
+plugin=libopenjdkjvmtid.so
+agent=libtiagentd.so
+lib=tiagentd
+if  [[ "$@" == *"-O"* ]]; then
+  agent=libtiagent.so
+  plugin=libopenjdkjvmti.so
+  lib=tiagent
+fi
+
+if [[ "$@" == *"--jvm"* ]]; then
+  arg="jvm"
+else
+  arg="art"
+fi
+
+if [[ "$@" != *"--debuggable"* ]]; then
+  other_args=" -Xcompiler-option --debuggable "
+else
+  other_args=""
+fi
+
+./default-run "$@" --experimental agents \
+                   --experimental runtime-plugins \
+                   --runtime-option -agentpath:${agent}=913-heaps,${arg} \
+                   --android-runtime-option -Xplugin:${plugin} \
+                   ${other_args} \
+                   --args ${lib}
diff --git a/test/913-heaps/src/Main.java b/test/913-heaps/src/Main.java
new file mode 100644
index 0000000..2cc9c3a
--- /dev/null
+++ b/test/913-heaps/src/Main.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+import java.util.ArrayList;
+
+public class Main {
+  public static void main(String[] args) throws Exception {
+    System.loadLibrary(args[1]);
+
+    doTest();
+  }
+
+  public static void doTest() throws Exception {
+    setupGcCallback();
+
+    enableGcTracking(true);
+    run();
+    enableGcTracking(false);
+  }
+
+  private static void run() {
+    clearStats();
+    printStats();
+    forceGarbageCollection();
+    printStats();
+  }
+
+  private static void clearStats() {
+    getGcStarts();
+    getGcFinishes();
+  }
+
+  private static void printStats() {
+      System.out.println("---");
+      int s = getGcStarts();
+      int f = getGcFinishes();
+      System.out.println((s > 0) + " " + (f > 0));
+  }
+
+  private static native void setupGcCallback();
+  private static native void enableGcTracking(boolean enable);
+  private static native int getGcStarts();
+  private static native int getGcFinishes();
+  private static native void forceGarbageCollection();
+}
diff --git a/test/956-methodhandles/expected.txt b/test/956-methodhandles/expected.txt
index ddc1cb0..ad1c43c 100644
--- a/test/956-methodhandles/expected.txt
+++ b/test/956-methodhandles/expected.txt
@@ -3,3 +3,4 @@
 foo_A
 foo_B
 privateRyan_D
+Received exception: Expected (java.lang.String, java.lang.String)java.lang.String but was (java.lang.String, java.lang.Object)void
diff --git a/test/956-methodhandles/src/Main.java b/test/956-methodhandles/src/Main.java
index badea53..58ba55d 100644
--- a/test/956-methodhandles/src/Main.java
+++ b/test/956-methodhandles/src/Main.java
@@ -57,8 +57,7 @@
   public static void main(String[] args) throws Throwable {
     testfindSpecial_invokeSuperBehaviour();
     testfindSpecial_invokeDirectBehaviour();
-
-    testThrowException();
+    testExceptionDetailMessages();
   }
 
   public static void testfindSpecial_invokeSuperBehaviour() throws Throwable {
@@ -87,10 +86,6 @@
       mh1.invokeExact(aInstance);
       System.out.println("mh1.invoke(aInstance) should not succeeed");
     } catch (WrongMethodTypeException expected) {
-    } catch (ClassCastException workaround) {
-      // TODO(narayan): ART treats all invokes as if they were non-exact. We
-      // should throw a WMTE if we execute an invoke-polymorphic instruction whose
-      // target method is MethodHandle.invokeExact.
     }
 
     // This should *still* be as if an invoke-super was called from one of C's
@@ -134,18 +129,15 @@
     }
   }
 
-  public static void testThrowException() throws Throwable {
-    MethodHandle handle = MethodHandles.throwException(String.class,
-        IllegalArgumentException.class);
-    if (handle.type().returnType() != String.class) {
-      System.out.println("Unexpected return type for handle: " + handle
-          + " [ " + handle.type() + "]");
-    }
+  public static void testExceptionDetailMessages() throws Throwable {
+    MethodHandle handle = MethodHandles.lookup().findVirtual(String.class, "concat",
+        MethodType.methodType(String.class, String.class));
 
     try {
-      handle.invoke();
-      System.out.println("Expected an exception of type: java.lang.IllegalArgumentException");
-    } catch (IllegalArgumentException expected) {
+      handle.invokeExact("a", new Object());
+      System.out.println("invokeExact(\"a\", new Object()) unexpectedly succeeded.");
+    } catch (WrongMethodTypeException ex) {
+      System.out.println("Received exception: " + ex.getMessage());
     }
   }
 }
diff --git a/test/957-methodhandle-transforms/build b/test/957-methodhandle-transforms/build
new file mode 100755
index 0000000..a423ca6
--- /dev/null
+++ b/test/957-methodhandle-transforms/build
@@ -0,0 +1,25 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# 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.
+
+# make us exit on a failure
+set -e
+
+if [[ $@ != *"--jvm"* ]]; then
+  # Don't do anything with jvm.
+  export USE_JACK=true
+fi
+
+./default-build "$@" --experimental method-handles
diff --git a/test/957-methodhandle-transforms/expected.txt b/test/957-methodhandle-transforms/expected.txt
new file mode 100644
index 0000000..73a34bc
--- /dev/null
+++ b/test/957-methodhandle-transforms/expected.txt
@@ -0,0 +1,35 @@
+---
+-- testDelegation
+---
+boolean: false
+char: h
+short: 56
+int: 72
+long: 2147483689
+float: 0.56
+double: 100.0
+String: hello
+Object: goodbye
+boolean: false
+char: h
+short: 56
+int: 72
+long: 73
+float: 0.56
+double: 100.0
+String: hello
+Object: goodbye
+true
+true
+a
+a
+42
+42
+43
+43
+43.0
+43.0
+43.0
+43.0
+plank
+plank
diff --git a/test/957-methodhandle-transforms/info.txt b/test/957-methodhandle-transforms/info.txt
new file mode 100644
index 0000000..bc50e85
--- /dev/null
+++ b/test/957-methodhandle-transforms/info.txt
@@ -0,0 +1,3 @@
+Tests for method handle transformations.
+
+NOTE: needs to run under ART or a Java 8 Language runtime and compiler.
diff --git a/test/957-methodhandle-transforms/run b/test/957-methodhandle-transforms/run
new file mode 100755
index 0000000..a9f1822
--- /dev/null
+++ b/test/957-methodhandle-transforms/run
@@ -0,0 +1,20 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# 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.
+
+# make us exit on a failure
+set -e
+
+./default-run "$@" --experimental method-handles
diff --git a/test/957-methodhandle-transforms/src/Main.java b/test/957-methodhandle-transforms/src/Main.java
new file mode 100644
index 0000000..e9d313b
--- /dev/null
+++ b/test/957-methodhandle-transforms/src/Main.java
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.lang.invoke.MethodType;
+import java.lang.invoke.WrongMethodTypeException;
+import java.lang.invoke.Transformers.Transformer;
+
+import dalvik.system.EmulatedStackFrame;
+
+public class Main {
+
+  public static void testDelegate_allTypes(boolean z, char a, short b, int c, long d,
+                                           float e, double f, String g, Object h) {
+    System.out.println("boolean: " + z);
+    System.out.println("char: " + a);
+    System.out.println("short: " + b);
+    System.out.println("int: " + c);
+    System.out.println("long: " + d);
+    System.out.println("float: " + e);
+    System.out.println("double: " + f);
+    System.out.println("String: " + g);
+    System.out.println("Object: " + h);
+  }
+
+  public static boolean testDelegate_returnBoolean() {
+    return true;
+  }
+
+  public static char testDelegate_returnChar() {
+    return 'a';
+  }
+
+  public static int testDelegate_returnInt() {
+    return 42;
+  }
+
+  public static long testDelegate_returnLong() {
+    return 43;
+  }
+
+  public static float testDelegate_returnFloat() {
+    return 43.0f;
+  }
+
+  public static double testDelegate_returnDouble() {
+    return 43.0;
+  }
+
+  public static String testDelegate_returnString() {
+    return "plank";
+  }
+
+  public static class DelegatingTransformer extends Transformer {
+    private final MethodHandle delegate;
+
+    public DelegatingTransformer(MethodHandle delegate) {
+      super(delegate.type());
+      this.delegate = delegate;
+    }
+
+    @Override
+    public void transform(EmulatedStackFrame stackFrame) throws Throwable {
+      delegate.invoke(stackFrame);
+    }
+  }
+
+  public static void main(String[] args) throws Throwable {
+    testThrowException();
+
+    testDelegation();
+  }
+
+  public static void testDelegation() throws Throwable {
+    System.out.println("---");
+    System.out.println("-- testDelegation");
+    System.out.println("---");
+
+    MethodHandle specialFunctionHandle = MethodHandles.lookup().findStatic(
+        Main.class, "testDelegate_allTypes", MethodType.methodType(void.class,
+          new Class<?>[] { boolean.class, char.class, short.class, int.class, long.class,
+            float.class, double.class, String.class, Object.class }));
+
+    DelegatingTransformer delegate = new DelegatingTransformer(specialFunctionHandle);
+
+    // Test an exact invoke.
+    //
+    // Note that the shorter form below doesn't work and must be
+    // investigated on the jack side :  b/32536744
+    //
+    // delegate.invokeExact(false, 'h', (short) 56, 72, Integer.MAX_VALUE + 42l,
+    //    0.56f, 100.0d, "hello", (Object) "goodbye");
+
+    Object obj = "goodbye";
+    delegate.invokeExact(false, 'h', (short) 56, 72, Integer.MAX_VALUE + 42l,
+        0.56f, 100.0d, "hello", obj);
+
+    // Test a non exact invoke with one int -> long conversion and a float -> double
+    // conversion.
+    delegate.invoke(false, 'h', (short) 56, 72, 73,
+        0.56f, 100.0f, "hello", "goodbye");
+
+    // Should throw a WrongMethodTypeException if the types don't align.
+    try {
+      delegate.invoke(false);
+      throw new AssertionError("Call to invoke unexpectedly succeeded");
+    } catch (WrongMethodTypeException expected) {
+    }
+
+    // Test return values.
+
+    // boolean.
+    MethodHandle returner = MethodHandles.lookup().findStatic(
+        Main.class, "testDelegate_returnBoolean", MethodType.methodType(boolean.class));
+    delegate = new DelegatingTransformer(returner);
+
+    System.out.println((boolean) delegate.invoke());
+    System.out.println((boolean) delegate.invokeExact());
+
+    // char.
+    returner = MethodHandles.lookup().findStatic(
+        Main.class, "testDelegate_returnChar", MethodType.methodType(char.class));
+    delegate = new DelegatingTransformer(returner);
+
+    System.out.println((char) delegate.invoke());
+    System.out.println((char) delegate.invokeExact());
+
+    // int.
+    returner = MethodHandles.lookup().findStatic(
+        Main.class, "testDelegate_returnInt", MethodType.methodType(int.class));
+    delegate = new DelegatingTransformer(returner);
+
+    System.out.println((int) delegate.invoke());
+    System.out.println((int) delegate.invokeExact());
+
+    // long.
+    returner = MethodHandles.lookup().findStatic(
+        Main.class, "testDelegate_returnLong", MethodType.methodType(long.class));
+    delegate = new DelegatingTransformer(returner);
+
+    System.out.println((long) delegate.invoke());
+    System.out.println((long) delegate.invokeExact());
+
+    // float.
+    returner = MethodHandles.lookup().findStatic(
+        Main.class, "testDelegate_returnFloat", MethodType.methodType(float.class));
+    delegate = new DelegatingTransformer(returner);
+
+    System.out.println((float) delegate.invoke());
+    System.out.println((float) delegate.invokeExact());
+
+    // double.
+    returner = MethodHandles.lookup().findStatic(
+        Main.class, "testDelegate_returnDouble", MethodType.methodType(double.class));
+    delegate = new DelegatingTransformer(returner);
+
+    System.out.println((double) delegate.invoke());
+    System.out.println((double) delegate.invokeExact());
+
+    // references.
+    returner = MethodHandles.lookup().findStatic(
+        Main.class, "testDelegate_returnString", MethodType.methodType(String.class));
+    delegate = new DelegatingTransformer(returner);
+
+    System.out.println((String) delegate.invoke());
+    System.out.println((String) delegate.invokeExact());
+  }
+
+  public static void testThrowException() throws Throwable {
+    MethodHandle handle = MethodHandles.throwException(String.class,
+        IllegalArgumentException.class);
+
+    if (handle.type().returnType() != String.class) {
+      System.out.println("Unexpected return type for handle: " + handle +
+          " [ " + handle.type() + "]");
+    }
+
+    try {
+      handle.invoke();
+      System.out.println("Expected an exception of type: java.lang.IllegalArgumentException");
+    } catch (IllegalArgumentException expected) {
+    }
+  }
+}
+
+
diff --git a/test/979-invoke-polymorphic-accessors/build b/test/979-invoke-polymorphic-accessors/build
new file mode 100644
index 0000000..a423ca6
--- /dev/null
+++ b/test/979-invoke-polymorphic-accessors/build
@@ -0,0 +1,25 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# 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.
+
+# make us exit on a failure
+set -e
+
+if [[ $@ != *"--jvm"* ]]; then
+  # Don't do anything with jvm.
+  export USE_JACK=true
+fi
+
+./default-build "$@" --experimental method-handles
diff --git a/test/979-invoke-polymorphic-accessors/expected.txt b/test/979-invoke-polymorphic-accessors/expected.txt
new file mode 100644
index 0000000..2987b6c
--- /dev/null
+++ b/test/979-invoke-polymorphic-accessors/expected.txt
@@ -0,0 +1 @@
+Passed InvokeExact tests for accessors.
diff --git a/test/979-invoke-polymorphic-accessors/info.txt b/test/979-invoke-polymorphic-accessors/info.txt
new file mode 100644
index 0000000..b2f55f0
--- /dev/null
+++ b/test/979-invoke-polymorphic-accessors/info.txt
@@ -0,0 +1 @@
+This test requires Jack with invoke-polymorphic support.
diff --git a/test/979-invoke-polymorphic-accessors/run b/test/979-invoke-polymorphic-accessors/run
new file mode 100644
index 0000000..a9f1822
--- /dev/null
+++ b/test/979-invoke-polymorphic-accessors/run
@@ -0,0 +1,20 @@
+#!/bin/bash
+#
+# Copyright 2016 The Android Open Source Project
+#
+# 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.
+
+# make us exit on a failure
+set -e
+
+./default-run "$@" --experimental method-handles
diff --git a/test/979-invoke-polymorphic-accessors/src/Main.java b/test/979-invoke-polymorphic-accessors/src/Main.java
new file mode 100644
index 0000000..6cdcd10
--- /dev/null
+++ b/test/979-invoke-polymorphic-accessors/src/Main.java
@@ -0,0 +1,727 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.WrongMethodTypeException;
+
+public class Main {
+
+    public static class ValueHolder {
+        public boolean m_z = false;
+        public byte m_b = 0;
+        public char m_c = 'a';
+        public short m_s = 0;
+        public int m_i = 0;
+        public float m_f = 0.0f;
+        public double m_d = 0.0;
+        public long m_j = 0;
+        public String m_l = "a";
+
+        public static boolean s_z;
+        public static byte s_b;
+        public static char s_c;
+        public static short s_s;
+        public static int s_i;
+        public static float s_f;
+        public static double s_d;
+        public static long s_j;
+        public static String s_l;
+
+        public final int m_fi = 0xa5a5a5a5;
+        public static final int s_fi = 0x5a5a5a5a;
+    }
+
+    public static class InvokeExactTester {
+        private enum PrimitiveType {
+            Boolean,
+            Byte,
+            Char,
+            Short,
+            Int,
+            Long,
+            Float,
+            Double,
+            String,
+        }
+
+        private enum AccessorType {
+            IPUT,
+            SPUT,
+            IGET,
+            SGET,
+        }
+
+        private static void assertActualAndExpectedMatch(boolean actual, boolean expected)
+                throws AssertionError {
+            if (actual != expected) {
+                throw new AssertionError("Actual != Expected (" + actual + " != " + expected + ")");
+            }
+        }
+
+        private static void assertTrue(boolean value) throws AssertionError {
+            if (!value) {
+                throw new AssertionError("Value is not true");
+            }
+        }
+
+        static void setByte(MethodHandle m, ValueHolder v, byte value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setByte(MethodHandle m, byte value, boolean expectFailure) throws Throwable {
+            setByte(m, null, value, expectFailure);
+        }
+
+        static void getByte(MethodHandle m, ValueHolder v, byte value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final byte got;
+                if (v == null) {
+                    got = (byte)m.invokeExact();
+                } else {
+                    got = (byte)m.invokeExact(v);
+                }
+                assertTrue(got == value);
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getByte(MethodHandle m, byte value, boolean expectFailure) throws Throwable {
+            getByte(m, null, value, expectFailure);
+        }
+
+        static void setChar(MethodHandle m, ValueHolder v, char value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setChar(MethodHandle m, char value, boolean expectFailure) throws Throwable {
+            setChar(m, null, value, expectFailure);
+        }
+
+        static void getChar(MethodHandle m, ValueHolder v, char value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final char got;
+                if (v == null) {
+                    got = (char)m.invokeExact();
+                } else {
+                    got = (char)m.invokeExact(v);
+                }
+                assertTrue(got == value);
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getChar(MethodHandle m, char value, boolean expectFailure) throws Throwable {
+            getChar(m, null, value, expectFailure);
+        }
+
+        static void setShort(MethodHandle m, ValueHolder v, short value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setShort(MethodHandle m, short value, boolean expectFailure) throws Throwable {
+            setShort(m, null, value, expectFailure);
+        }
+
+        static void getShort(MethodHandle m, ValueHolder v, short value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final short got = (v == null) ? (short)m.invokeExact() : (short)m.invokeExact(v);
+                assertTrue(got == value);
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getShort(MethodHandle m, short value, boolean expectFailure) throws Throwable {
+            getShort(m, null, value, expectFailure);
+        }
+
+        static void setInt(MethodHandle m, ValueHolder v, int value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setInt(MethodHandle m, int value, boolean expectFailure) throws Throwable {
+            setInt(m, null, value, expectFailure);
+        }
+
+        static void getInt(MethodHandle m, ValueHolder v, int value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final int got = (v == null) ? (int)m.invokeExact() : (int)m.invokeExact(v);
+                assertTrue(got == value);
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getInt(MethodHandle m, int value, boolean expectFailure) throws Throwable {
+            getInt(m, null, value, expectFailure);
+        }
+
+        static void setLong(MethodHandle m, ValueHolder v, long value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setLong(MethodHandle m, long value, boolean expectFailure) throws Throwable {
+            setLong(m, null, value, expectFailure);
+        }
+
+        static void getLong(MethodHandle m, ValueHolder v, long value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final long got = (v == null) ? (long)m.invokeExact() : (long)m.invokeExact(v);
+                assertTrue(got == value);
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getLong(MethodHandle m, long value, boolean expectFailure) throws Throwable {
+            getLong(m, null, value, expectFailure);
+        }
+
+        static void setFloat(MethodHandle m, ValueHolder v, float value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setFloat(MethodHandle m, float value, boolean expectFailure) throws Throwable {
+            setFloat(m, null, value, expectFailure);
+        }
+
+        static void getFloat(MethodHandle m, ValueHolder v, float value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final float got = (v == null) ? (float)m.invokeExact() : (float)m.invokeExact(v);
+                assertTrue(got == value);
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getFloat(MethodHandle m, float value, boolean expectFailure) throws Throwable {
+            getFloat(m, null, value, expectFailure);
+        }
+
+        static void setDouble(MethodHandle m, ValueHolder v, double value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setDouble(MethodHandle m, double value, boolean expectFailure)
+                throws Throwable {
+            setDouble(m, null, value, expectFailure);
+        }
+
+        static void getDouble(MethodHandle m, ValueHolder v, double value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final double got = (v == null) ? (double)m.invokeExact() : (double)m.invokeExact(v);
+                assertTrue(got == value);
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getDouble(MethodHandle m, double value, boolean expectFailure)
+                throws Throwable {
+            getDouble(m, null, value, expectFailure);
+        }
+
+        static void setString(MethodHandle m, ValueHolder v, String value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setString(MethodHandle m, String value, boolean expectFailure)
+                throws Throwable {
+            setString(m, null, value, expectFailure);
+        }
+
+        static void getString(MethodHandle m, ValueHolder v, String value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final String got = (v == null) ? (String)m.invokeExact() : (String)m.invokeExact(v);
+                assertTrue(got.equals(value));
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getString(MethodHandle m, String value, boolean expectFailure)
+                throws Throwable {
+            getString(m, null, value, expectFailure);
+        }
+
+        static void setBoolean(MethodHandle m, ValueHolder v, boolean value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                if (v == null) {
+                    m.invokeExact(value);
+                }
+                else {
+                    m.invokeExact(v, value);
+                }
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void setBoolean(MethodHandle m, boolean value, boolean expectFailure)
+                throws Throwable {
+            setBoolean(m, null, value, expectFailure);
+        }
+
+        static void getBoolean(MethodHandle m, ValueHolder v, boolean value, boolean expectFailure)
+                throws Throwable {
+            boolean exceptionThrown = false;
+            try {
+                final boolean got =
+                        (v == null) ? (boolean)m.invokeExact() : (boolean)m.invokeExact(v);
+                assertTrue(got == value);
+            }
+            catch (WrongMethodTypeException e) {
+                exceptionThrown = true;
+            }
+            assertActualAndExpectedMatch(exceptionThrown, expectFailure);
+        }
+
+        static void getBoolean(MethodHandle m, boolean value, boolean expectFailure)
+                throws Throwable {
+            getBoolean(m, null, value, expectFailure);
+        }
+
+        static boolean resultFor(PrimitiveType actualType, PrimitiveType expectedType,
+                                 AccessorType actualAccessor,
+                                 AccessorType expectedAccessor) {
+            return (actualType != expectedType) || (actualAccessor != expectedAccessor);
+        }
+
+        static void tryAccessor(MethodHandle methodHandle,
+                                ValueHolder valueHolder,
+                                PrimitiveType primitive,
+                                Object value,
+                                AccessorType accessor) throws Throwable {
+            boolean booleanValue =
+                    value instanceof Boolean ? ((Boolean)value).booleanValue() : false;
+            setBoolean(methodHandle, valueHolder, booleanValue,
+                       resultFor(primitive, PrimitiveType.Boolean, accessor, AccessorType.IPUT));
+            setBoolean(methodHandle, booleanValue,
+                       resultFor(primitive, PrimitiveType.Boolean, accessor, AccessorType.SPUT));
+            getBoolean(methodHandle, valueHolder, booleanValue,
+                       resultFor(primitive, PrimitiveType.Boolean, accessor, AccessorType.IGET));
+            getBoolean(methodHandle, booleanValue,
+                       resultFor(primitive, PrimitiveType.Boolean, accessor, AccessorType.SGET));
+
+            byte byteValue = value instanceof Byte ? ((Byte)value).byteValue() : (byte)0;
+            setByte(methodHandle, valueHolder, byteValue,
+                    resultFor(primitive, PrimitiveType.Byte, accessor, AccessorType.IPUT));
+            setByte(methodHandle, byteValue,
+                    resultFor(primitive, PrimitiveType.Byte, accessor, AccessorType.SPUT));
+            getByte(methodHandle, valueHolder, byteValue,
+                    resultFor(primitive, PrimitiveType.Byte, accessor, AccessorType.IGET));
+            getByte(methodHandle, byteValue,
+                    resultFor(primitive, PrimitiveType.Byte, accessor, AccessorType.SGET));
+
+            char charValue = value instanceof Character ? ((Character)value).charValue() : 'z';
+            setChar(methodHandle, valueHolder, charValue,
+                    resultFor(primitive, PrimitiveType.Char, accessor, AccessorType.IPUT));
+            setChar(methodHandle, charValue,
+                    resultFor(primitive, PrimitiveType.Char, accessor, AccessorType.SPUT));
+            getChar(methodHandle, valueHolder, charValue,
+                    resultFor(primitive, PrimitiveType.Char, accessor, AccessorType.IGET));
+            getChar(methodHandle, charValue,
+                    resultFor(primitive, PrimitiveType.Char, accessor, AccessorType.SGET));
+
+            short shortValue = value instanceof Short ? ((Short)value).shortValue() : (short)0;
+            setShort(methodHandle, valueHolder, shortValue,
+                     resultFor(primitive, PrimitiveType.Short, accessor, AccessorType.IPUT));
+            setShort(methodHandle, shortValue,
+                    resultFor(primitive, PrimitiveType.Short, accessor, AccessorType.SPUT));
+            getShort(methodHandle, valueHolder, shortValue,
+                     resultFor(primitive, PrimitiveType.Short, accessor, AccessorType.IGET));
+            getShort(methodHandle, shortValue,
+                    resultFor(primitive, PrimitiveType.Short, accessor, AccessorType.SGET));
+
+            int intValue = value instanceof Integer ? ((Integer)value).intValue() : -1;
+            setInt(methodHandle, valueHolder, intValue,
+                   resultFor(primitive, PrimitiveType.Int, accessor, AccessorType.IPUT));
+            setInt(methodHandle, intValue,
+                   resultFor(primitive, PrimitiveType.Int, accessor, AccessorType.SPUT));
+            getInt(methodHandle, valueHolder, intValue,
+                   resultFor(primitive, PrimitiveType.Int, accessor, AccessorType.IGET));
+            getInt(methodHandle, intValue,
+                   resultFor(primitive, PrimitiveType.Int, accessor, AccessorType.SGET));
+
+            long longValue = value instanceof Long ? ((Long)value).longValue() : (long)-1;
+            setLong(methodHandle, valueHolder, longValue,
+                    resultFor(primitive, PrimitiveType.Long, accessor, AccessorType.IPUT));
+            setLong(methodHandle, longValue,
+                    resultFor(primitive, PrimitiveType.Long, accessor, AccessorType.SPUT));
+            getLong(methodHandle, valueHolder, longValue,
+                    resultFor(primitive, PrimitiveType.Long, accessor, AccessorType.IGET));
+            getLong(methodHandle, longValue,
+                    resultFor(primitive, PrimitiveType.Long, accessor, AccessorType.SGET));
+
+            float floatValue = value instanceof Float ? ((Float)value).floatValue() : -1.0f;
+            setFloat(methodHandle, valueHolder, floatValue,
+                    resultFor(primitive, PrimitiveType.Float, accessor, AccessorType.IPUT));
+            setFloat(methodHandle, floatValue,
+                    resultFor(primitive, PrimitiveType.Float, accessor, AccessorType.SPUT));
+            getFloat(methodHandle, valueHolder, floatValue,
+                    resultFor(primitive, PrimitiveType.Float, accessor, AccessorType.IGET));
+            getFloat(methodHandle, floatValue,
+                     resultFor(primitive, PrimitiveType.Float, accessor, AccessorType.SGET));
+
+            double doubleValue = value instanceof Double ? ((Double)value).doubleValue() : -1.0;
+            setDouble(methodHandle, valueHolder, doubleValue,
+                      resultFor(primitive, PrimitiveType.Double, accessor, AccessorType.IPUT));
+            setDouble(methodHandle, doubleValue,
+                      resultFor(primitive, PrimitiveType.Double, accessor, AccessorType.SPUT));
+            getDouble(methodHandle, valueHolder, doubleValue,
+                      resultFor(primitive, PrimitiveType.Double, accessor, AccessorType.IGET));
+            getDouble(methodHandle, doubleValue,
+                      resultFor(primitive, PrimitiveType.Double, accessor, AccessorType.SGET));
+
+            String stringValue = value instanceof String ? ((String) value) : "No Spock, no";
+            setString(methodHandle, valueHolder, stringValue,
+                      resultFor(primitive, PrimitiveType.String, accessor, AccessorType.IPUT));
+            setString(methodHandle, stringValue,
+                      resultFor(primitive, PrimitiveType.String, accessor, AccessorType.SPUT));
+            getString(methodHandle, valueHolder, stringValue,
+                      resultFor(primitive, PrimitiveType.String, accessor, AccessorType.IGET));
+            getString(methodHandle, stringValue,
+                      resultFor(primitive, PrimitiveType.String, accessor, AccessorType.SGET));
+        }
+
+        public static void main() throws Throwable {
+            ValueHolder valueHolder = new ValueHolder();
+            MethodHandles.Lookup lookup = MethodHandles.lookup();
+
+            boolean [] booleans = { false, true, false };
+            for (boolean b : booleans) {
+                Boolean boxed = new Boolean(b);
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_z", boolean.class),
+                            valueHolder, PrimitiveType.Boolean, boxed, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_z", boolean.class),
+                            valueHolder, PrimitiveType.Boolean, boxed, AccessorType.IGET);
+                assertTrue(valueHolder.m_z == b);
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_z", boolean.class),
+                            valueHolder, PrimitiveType.Boolean, boxed, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_z", boolean.class),
+                            valueHolder, PrimitiveType.Boolean, boxed, AccessorType.SGET);
+                assertTrue(ValueHolder.s_z == b);
+            }
+
+            byte [] bytes = { (byte)0x73, (byte)0xfe };
+            for (byte b : bytes) {
+                Byte boxed = new Byte(b);
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_b", byte.class),
+                            valueHolder, PrimitiveType.Byte, boxed, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_b", byte.class),
+                            valueHolder, PrimitiveType.Byte, boxed, AccessorType.IGET);
+                assertTrue(valueHolder.m_b == b);
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_b", byte.class),
+                            valueHolder, PrimitiveType.Byte, boxed, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_b", byte.class),
+                            valueHolder, PrimitiveType.Byte, boxed, AccessorType.SGET);
+                assertTrue(ValueHolder.s_b == b);
+            }
+
+            char [] chars = { 'a', 'b', 'c' };
+            for (char c : chars) {
+                Character boxed = new Character(c);
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_c", char.class),
+                            valueHolder, PrimitiveType.Char, boxed, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_c", char.class),
+                            valueHolder, PrimitiveType.Char, boxed, AccessorType.IGET);
+                assertTrue(valueHolder.m_c == c);
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_c", char.class),
+                            valueHolder, PrimitiveType.Char, boxed, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_c", char.class),
+                            valueHolder, PrimitiveType.Char, boxed, AccessorType.SGET);
+                assertTrue(ValueHolder.s_c == c);
+            }
+
+            short [] shorts = { (short)0x1234, (short)0x4321 };
+            for (short s : shorts) {
+                Short boxed = new Short(s);
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_s", short.class),
+                            valueHolder, PrimitiveType.Short, boxed, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_s", short.class),
+                            valueHolder, PrimitiveType.Short, boxed, AccessorType.IGET);
+                assertTrue(valueHolder.m_s == s);
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_s", short.class),
+                            valueHolder, PrimitiveType.Short, boxed, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_s", short.class),
+                            valueHolder, PrimitiveType.Short, boxed, AccessorType.SGET);
+                assertTrue(ValueHolder.s_s == s);
+            }
+
+            int [] ints = { -100000000, 10000000 };
+            for (int i : ints) {
+                Integer boxed = new Integer(i);
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_i", int.class),
+                            valueHolder, PrimitiveType.Int, boxed, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_i", int.class),
+                            valueHolder, PrimitiveType.Int, boxed, AccessorType.IGET);
+                assertTrue(valueHolder.m_i == i);
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_i", int.class),
+                            valueHolder, PrimitiveType.Int, boxed, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_i", int.class),
+                            valueHolder, PrimitiveType.Int, boxed, AccessorType.SGET);
+                assertTrue(ValueHolder.s_i == i);
+            }
+
+            float [] floats = { 0.99f, -1.23e-17f };
+            for (float f : floats) {
+                Float boxed = new Float(f);
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_f", float.class),
+                            valueHolder, PrimitiveType.Float, boxed, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_f", float.class),
+                            valueHolder, PrimitiveType.Float, boxed, AccessorType.IGET);
+                assertTrue(valueHolder.m_f == f);
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_f", float.class),
+                            valueHolder, PrimitiveType.Float, boxed, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_f", float.class),
+                            valueHolder, PrimitiveType.Float, boxed, AccessorType.SGET);
+                assertTrue(ValueHolder.s_f == f);
+            }
+
+            double [] doubles = { 0.44444444444e37, -0.555555555e-37 };
+            for (double d : doubles) {
+                Double boxed = new Double(d);
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_d", double.class),
+                            valueHolder, PrimitiveType.Double, boxed, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_d", double.class),
+                            valueHolder, PrimitiveType.Double, boxed, AccessorType.IGET);
+                assertTrue(valueHolder.m_d == d);
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_d", double.class),
+                            valueHolder, PrimitiveType.Double, boxed, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_d", double.class),
+                            valueHolder, PrimitiveType.Double, boxed, AccessorType.SGET);
+                assertTrue(ValueHolder.s_d == d);
+            }
+
+            long [] longs = { 0x0123456789abcdefl, 0xfedcba9876543210l };
+            for (long j : longs) {
+                Long boxed = new Long(j);
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_j", long.class),
+                            valueHolder, PrimitiveType.Long, boxed, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_j", long.class),
+                            valueHolder, PrimitiveType.Long, boxed, AccessorType.IGET);
+                assertTrue(valueHolder.m_j == j);
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_j", long.class),
+                            valueHolder, PrimitiveType.Long, boxed, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_j", long.class),
+                            valueHolder, PrimitiveType.Long, boxed, AccessorType.SGET);
+                assertTrue(ValueHolder.s_j == j);
+            }
+
+            String [] strings = { "octopus", "crab" };
+            for (String s : strings) {
+                tryAccessor(lookup.findSetter(ValueHolder.class, "m_l", String.class),
+                            valueHolder, PrimitiveType.String, s, AccessorType.IPUT);
+                tryAccessor(lookup.findGetter(ValueHolder.class, "m_l", String.class),
+                            valueHolder, PrimitiveType.String, s, AccessorType.IGET);
+                assertTrue(s.equals(valueHolder.m_l));
+                tryAccessor(lookup.findStaticSetter(ValueHolder.class, "s_l", String.class),
+                            valueHolder, PrimitiveType.String, s, AccessorType.SPUT);
+                tryAccessor(lookup.findStaticGetter(ValueHolder.class, "s_l", String.class),
+                            valueHolder, PrimitiveType.String, s, AccessorType.SGET);
+                assertTrue(s.equals(ValueHolder.s_l));
+            }
+
+            System.out.println("Passed InvokeExact tests for accessors.");
+        }
+    }
+
+    public static class FindAccessorTester {
+        public static void main() throws Throwable {
+            ValueHolder valueHolder = new ValueHolder();
+            MethodHandles.Lookup lookup = MethodHandles.lookup();
+
+            lookup.findStaticGetter(ValueHolder.class, "s_fi", int.class);
+            try {
+                lookup.findStaticGetter(ValueHolder.class, "s_fi", byte.class);
+                unreachable();
+            } catch (NoSuchFieldException e) {}
+            try {
+                lookup.findGetter(ValueHolder.class, "s_fi", byte.class);
+                unreachable();
+            } catch (NoSuchFieldException e) {}
+            try {
+                lookup.findStaticSetter(ValueHolder.class, "s_fi", int.class);
+                unreachable();
+            } catch (IllegalAccessException e) {}
+
+            lookup.findGetter(ValueHolder.class, "m_fi", int.class);
+            try {
+                lookup.findGetter(ValueHolder.class, "m_fi", byte.class);
+                unreachable();
+            } catch (NoSuchFieldException e) {}
+            try {
+                lookup.findStaticGetter(ValueHolder.class, "m_fi", byte.class);
+                unreachable();
+            } catch (NoSuchFieldException e) {}
+            try {
+                lookup.findSetter(ValueHolder.class, "m_fi", int.class);
+                unreachable();
+            } catch (IllegalAccessException e) {}
+        }
+
+        public static void unreachable() throws Throwable{
+            throw new Error("unreachable");
+        }
+    }
+
+    public static void main(String[] args) throws Throwable {
+        FindAccessorTester.main();
+        InvokeExactTester.main();
+    }
+}
diff --git a/test/Android.bp b/test/Android.bp
index 9675ef5..bdb7f80 100644
--- a/test/Android.bp
+++ b/test/Android.bp
@@ -254,6 +254,9 @@
         "908-gc-start-finish/gc_callbacks.cc",
         "909-attach-agent/attach.cc",
         "910-methods/methods.cc",
+        "911-get-stack-trace/stack_trace.cc",
+        "912-classes/classes.cc",
+        "913-heaps/heaps.cc",
     ],
     shared_libs: [
         "libbase",
diff --git a/test/Android.run-test.mk b/test/Android.run-test.mk
index fcb6f4d..ae569f9 100644
--- a/test/Android.run-test.mk
+++ b/test/Android.run-test.mk
@@ -277,6 +277,9 @@
   908-gc-start-finish \
   909-attach-agent \
   910-methods \
+  911-get-stack-trace \
+  912-classes \
+  913-heaps \
 
 ifneq (,$(filter target,$(TARGET_TYPES)))
   ART_TEST_KNOWN_BROKEN += $(call all-run-test-names,target,$(RUN_TYPES),$(PREBUILD_TYPES), \
@@ -372,13 +375,14 @@
 # * 137-cfi needs to unwind a second forked process. We're using a primitive sleep to wait till we
 #   hope the second process got into the expected state. The slowness of gcstress makes this bad.
 # * 908-gc-start-finish expects GCs only to be run at clear points. The reduced heap size makes
-#   this non-deterministic.
+#   this non-deterministic. Same for 913.
 # * 961-default-iface-resolution-gen and 964-default-iface-init-genare very long tests that often
 #   will take more than the timeout to run when gcstress is enabled. This is because gcstress
 #   slows down allocations significantly which these tests do a lot.
 TEST_ART_BROKEN_GCSTRESS_RUN_TESTS := \
   137-cfi \
   908-gc-start-finish \
+  913-heaps \
   961-default-iface-resolution-gen \
   964-default-iface-init-gen \  
 
diff --git a/test/common/runtime_state.cc b/test/common/runtime_state.cc
index 4248148..a2eb370 100644
--- a/test/common/runtime_state.cc
+++ b/test/common/runtime_state.cc
@@ -128,9 +128,10 @@
     return;
   }
 
+  Thread* self = Thread::Current();
   ArtMethod* method = nullptr;
   {
-    ScopedObjectAccess soa(Thread::Current());
+    ScopedObjectAccess soa(self);
 
     ScopedUtfChars chars(env, method_name);
     CHECK(chars.c_str() != nullptr);
@@ -147,11 +148,11 @@
     } else {
       // Sleep to yield to the compiler thread.
       usleep(1000);
-      ScopedObjectAccess soa(Thread::Current());
+      ScopedObjectAccess soa(self);
       // Make sure there is a profiling info, required by the compiler.
-      ProfilingInfo::Create(soa.Self(), method, /* retry_allocation */ true);
+      ProfilingInfo::Create(self, method, /* retry_allocation */ true);
       // Will either ensure it's compiled or do the compilation itself.
-      jit->CompileMethod(method, soa.Self(), /* osr */ false);
+      jit->CompileMethod(method, self, /* osr */ false);
     }
   }
 }
diff --git a/test/etc/run-test-jar b/test/etc/run-test-jar
index 3535f32..e769812 100755
--- a/test/etc/run-test-jar
+++ b/test/etc/run-test-jar
@@ -148,7 +148,7 @@
         SECONDARY_DEX=":$DEX_LOCATION/$TEST_NAME-ex.jar"
         # Enable cfg-append to make sure we get the dump for both dex files.
         # (otherwise the runtime compilation of the secondary dex will overwrite
-        # the dump of the first one)
+        # the dump of the first one).
         FLAGS="${FLAGS} -Xcompiler-option --dump-cfg-append"
         COMPILE_FLAGS="${COMPILE_FLAGS} --dump-cfg-append"
         shift
@@ -364,8 +364,8 @@
 if [ "$JIT" = "y" ]; then
     INT_OPTS="-Xusejit:true"
     if [ "$VERIFY" = "y" ] ; then
-      INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=verify-at-runtime"
-      COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=verify-at-runtime"
+      INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=interpret-only"
+      COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=interpret-only"
     else
       INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=verify-none"
       COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=verify-none"
diff --git a/test/ti-agent/common_load.cc b/test/ti-agent/common_load.cc
index 5e8ef94..a959482 100644
--- a/test/ti-agent/common_load.cc
+++ b/test/ti-agent/common_load.cc
@@ -34,6 +34,9 @@
 #include "908-gc-start-finish/gc_callbacks.h"
 #include "909-attach-agent/attach.h"
 #include "910-methods/methods.h"
+#include "911-get-stack-trace/stack_trace.h"
+#include "912-classes/classes.h"
+#include "913-heaps/heaps.h"
 
 namespace art {
 
@@ -60,6 +63,9 @@
   { "908-gc-start-finish", Test908GcStartFinish::OnLoad, nullptr },
   { "909-attach-agent", nullptr, Test909AttachAgent::OnAttach },
   { "910-methods", Test910Methods::OnLoad, nullptr },
+  { "911-get-stack-trace", Test911GetStackTrace::OnLoad, nullptr },
+  { "912-classes", Test912Classes::OnLoad, nullptr },
+  { "913-heaps", Test913Heaps::OnLoad, nullptr },
 };
 
 static AgentLib* FindAgent(char* name) {
diff --git a/tools/cpp-define-generator/constant_class.def b/tools/cpp-define-generator/constant_class.def
index 58372f9..f46cd33 100644
--- a/tools/cpp-define-generator/constant_class.def
+++ b/tools/cpp-define-generator/constant_class.def
@@ -25,6 +25,7 @@
 
 DEFINE_FLAG_OFFSET(MIRROR_CLASS, STATUS_INITIALIZED,       art::mirror::Class::kStatusInitialized)
 DEFINE_FLAG_OFFSET(ACCESS_FLAGS, CLASS_IS_FINALIZABLE,     art::kAccClassIsFinalizable)
+DEFINE_FLAG_OFFSET(ACCESS_FLAGS, CLASS_IS_INTERFACE,       art::kAccInterface)
 // TODO: We should really have a BitPosition which also checks it's a power of 2.
 DEFINE_FLAG_OFFSET(ACCESS_FLAGS, CLASS_IS_FINALIZABLE_BIT, art::MostSignificantBit(art::kAccClassIsFinalizable))
 
diff --git a/tools/cpp-define-generator/generate-asm-support b/tools/cpp-define-generator/generate-asm-support
index f95648b..fcdf72f 100755
--- a/tools/cpp-define-generator/generate-asm-support
+++ b/tools/cpp-define-generator/generate-asm-support
@@ -5,4 +5,4 @@
 
 [[ -z ${ANDROID_BUILD_TOP+x} ]] && (echo "Run source build/envsetup.sh first" >&2 && exit 1)
 
-cpp-define-generator-datad > ${ANDROID_BUILD_TOP}/art/runtime/generated/asm_support_gen.h
+cpp-define-generator-data > ${ANDROID_BUILD_TOP}/art/runtime/generated/asm_support_gen.h