compiler/driver/compiler_driver_test.cc - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2011 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 "driver/compiler_driver.h"

 #include <limits>
 #include <stdint.h>
 #include <stdio.h>
 #include <memory>

 #include "art_method-inl.h"
 #include "base/casts.h"
 #include "class_linker-inl.h"
 #include "common_compiler_test.h"
 #include "compiler_callbacks.h"
 #include "dex/dex_file.h"
 #include "dex/dex_file_types.h"
 #include "gc/heap.h"
 #include "handle_scope-inl.h"
 #include "mirror/class-inl.h"
 #include "mirror/class_loader.h"
 #include "mirror/dex_cache-inl.h"
 #include "mirror/object-inl.h"
 #include "mirror/object_array-inl.h"
 #include "profile/profile_compilation_info.h"
 #include "scoped_thread_state_change-inl.h"

 namespace art {

 class CompilerDriverTest : public CommonCompilerTest {
  protected:
   void CompileAll(jobject class_loader) REQUIRES(!Locks::mutator_lock_) {
     TimingLogger timings("CompilerDriverTest::CompileAll", false, false);
     TimingLogger::ScopedTiming t(__FUNCTION__, &timings);
     dex_files_ = GetDexFiles(class_loader);
     SetDexFilesForOatFile(dex_files_);
     compiler_driver_->CompileAll(class_loader, dex_files_, &timings);
     t.NewTiming("MakeAllExecutable");
     MakeAllExecutable(class_loader);
   }

   void EnsureCompiled(jobject class_loader, const char* class_name, const char* method,
                       const char* signature, bool is_virtual)
       REQUIRES(!Locks::mutator_lock_) {
     CompileAll(class_loader);
     Thread::Current()->TransitionFromSuspendedToRunnable();
     bool started = runtime_->Start();
     CHECK(started);
     env_ = Thread::Current()->GetJniEnv();
     class_ = env_->FindClass(class_name);
     CHECK(class_ != nullptr) << "Class not found: " << class_name;
     if (is_virtual) {
       mid_ = env_->GetMethodID(class_, method, signature);
     } else {
       mid_ = env_->GetStaticMethodID(class_, method, signature);
     }
     CHECK(mid_ != nullptr) << "Method not found: " << class_name << "." << method << signature;
   }

   void MakeAllExecutable(jobject class_loader) {
     const std::vector<const DexFile*> class_path = GetDexFiles(class_loader);
     for (size_t i = 0; i != class_path.size(); ++i) {
       const DexFile* dex_file = class_path[i];
       CHECK(dex_file != nullptr);
       MakeDexFileExecutable(class_loader, *dex_file);
     }
   }

   void MakeDexFileExecutable(jobject class_loader, const DexFile& dex_file) {
     ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
     for (size_t i = 0; i < dex_file.NumClassDefs(); i++) {
       const DexFile::ClassDef& class_def = dex_file.GetClassDef(i);
       const char* descriptor = dex_file.GetClassDescriptor(class_def);
       ScopedObjectAccess soa(Thread::Current());
       StackHandleScope<1> hs(soa.Self());
       Handle<mirror::ClassLoader> loader(
           hs.NewHandle(soa.Decode<mirror::ClassLoader>(class_loader)));
       ObjPtr<mirror::Class> c = class_linker->FindClass(soa.Self(), descriptor, loader);
       CHECK(c != nullptr);
       const auto pointer_size = class_linker->GetImagePointerSize();
       for (auto& m : c->GetMethods(pointer_size)) {
         MakeExecutable(&m);
       }
     }
   }

   JNIEnv* env_;
   jclass class_;
   jmethodID mid_;
   std::vector<const DexFile*> dex_files_;
 };

 // Disabled due to 10 second runtime on host
 // TODO: Update the test for hash-based dex cache arrays. Bug: 30627598
 TEST_F(CompilerDriverTest, DISABLED_LARGE_CompileDexLibCore) {
   CompileAll(nullptr);

   // All libcore references should resolve
   ScopedObjectAccess soa(Thread::Current());
   ASSERT_TRUE(java_lang_dex_file_ != nullptr);
   const DexFile& dex = *java_lang_dex_file_;
   ObjPtr<mirror::DexCache> dex_cache = class_linker_->FindDexCache(soa.Self(), dex);
   EXPECT_EQ(dex.NumStringIds(), dex_cache->NumStrings());
   for (size_t i = 0; i < dex_cache->NumStrings(); i++) {
     const ObjPtr<mirror::String> string = dex_cache->GetResolvedString(dex::StringIndex(i));
     EXPECT_TRUE(string != nullptr) << "string_idx=" << i;
   }
   EXPECT_EQ(dex.NumTypeIds(), dex_cache->NumResolvedTypes());
   for (size_t i = 0; i < dex_cache->NumResolvedTypes(); i++) {
     const ObjPtr<mirror::Class> type = dex_cache->GetResolvedType(dex::TypeIndex(i));
     EXPECT_TRUE(type != nullptr)
         << "type_idx=" << i << " " << dex.GetTypeDescriptor(dex.GetTypeId(dex::TypeIndex(i)));
   }
   EXPECT_TRUE(dex_cache->StaticMethodSize() == dex_cache->NumResolvedMethods()
       || dex.NumMethodIds() ==  dex_cache->NumResolvedMethods());
   auto* cl = Runtime::Current()->GetClassLinker();
   auto pointer_size = cl->GetImagePointerSize();
   for (size_t i = 0; i < dex_cache->NumResolvedMethods(); i++) {
     // FIXME: This is outdated for hash-based method array.
     ArtMethod* method = dex_cache->GetResolvedMethod(i, pointer_size);
     EXPECT_TRUE(method != nullptr) << "method_idx=" << i
                                 << " " << dex.GetMethodDeclaringClassDescriptor(dex.GetMethodId(i))
                                 << " " << dex.GetMethodName(dex.GetMethodId(i));
     EXPECT_TRUE(method->GetEntryPointFromQuickCompiledCode() != nullptr) << "method_idx=" << i
         << " " << dex.GetMethodDeclaringClassDescriptor(dex.GetMethodId(i)) << " "
         << dex.GetMethodName(dex.GetMethodId(i));
   }
   EXPECT_TRUE(dex_cache->StaticArtFieldSize() == dex_cache->NumResolvedFields()
       || dex.NumFieldIds() ==  dex_cache->NumResolvedFields());
   for (size_t i = 0; i < dex_cache->NumResolvedFields(); i++) {
     // FIXME: This is outdated for hash-based field array.
     ArtField* field = dex_cache->GetResolvedField(i, cl->GetImagePointerSize());
     EXPECT_TRUE(field != nullptr) << "field_idx=" << i
                                << " " << dex.GetFieldDeclaringClassDescriptor(dex.GetFieldId(i))
                                << " " << dex.GetFieldName(dex.GetFieldId(i));
   }

   // TODO check Class::IsVerified for all classes

   // TODO: check that all Method::GetCode() values are non-null
 }

 TEST_F(CompilerDriverTest, AbstractMethodErrorStub) {
   jobject class_loader;
   {
     ScopedObjectAccess soa(Thread::Current());
     class_loader = LoadDex("AbstractMethod");
   }
   ASSERT_TRUE(class_loader != nullptr);
   EnsureCompiled(class_loader, "AbstractClass", "foo", "()V", true);

   // Create a jobj_ of ConcreteClass, NOT AbstractClass.
   jclass c_class = env_->FindClass("ConcreteClass");

   jmethodID constructor = env_->GetMethodID(c_class, "<init>", "()V");

   jobject jobj_ = env_->NewObject(c_class, constructor);
   ASSERT_TRUE(jobj_ != nullptr);

   // Force non-virtual call to AbstractClass foo, will throw AbstractMethodError exception.
   env_->CallNonvirtualVoidMethod(jobj_, class_, mid_);

   EXPECT_EQ(env_->ExceptionCheck(), JNI_TRUE);
   jthrowable exception = env_->ExceptionOccurred();
   env_->ExceptionClear();
   jclass jlame = env_->FindClass("java/lang/AbstractMethodError");
   EXPECT_TRUE(env_->IsInstanceOf(exception, jlame));
   {
     ScopedObjectAccess soa(Thread::Current());
     Thread::Current()->ClearException();
   }
 }

 class CompilerDriverProfileTest : public CompilerDriverTest {
  protected:
   ProfileCompilationInfo* GetProfileCompilationInfo() OVERRIDE {
     ScopedObjectAccess soa(Thread::Current());
     std::vector<std::unique_ptr<const DexFile>> dex_files = OpenTestDexFiles("ProfileTestMultiDex");

     ProfileCompilationInfo info;
     for (const std::unique_ptr<const DexFile>& dex_file : dex_files) {
       profile_info_.AddMethodIndex(ProfileCompilationInfo::MethodHotness::kFlagHot,
                                    MethodReference(dex_file.get(), 1));
       profile_info_.AddMethodIndex(ProfileCompilationInfo::MethodHotness::kFlagHot,
                                    MethodReference(dex_file.get(), 2));
     }
     return &profile_info_;
   }

   CompilerFilter::Filter GetCompilerFilter() const OVERRIDE {
     // Use a profile based filter.
     return CompilerFilter::kSpeedProfile;
   }

   std::unordered_set<std::string> GetExpectedMethodsForClass(const std::string& clazz) {
     if (clazz == "Main") {
       return std::unordered_set<std::string>({
           "java.lang.String Main.getA()",
           "java.lang.String Main.getB()"});
     } else if (clazz == "Second") {
       return std::unordered_set<std::string>({
           "java.lang.String Second.getX()",
           "java.lang.String Second.getY()"});
     } else {
       return std::unordered_set<std::string>();
     }
   }

   void CheckCompiledMethods(jobject class_loader,
                             const std::string& clazz,
                             const std::unordered_set<std::string>& expected_methods) {
     ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
     Thread* self = Thread::Current();
     ScopedObjectAccess soa(self);
     StackHandleScope<1> hs(self);
     Handle<mirror::ClassLoader> h_loader(
         hs.NewHandle(soa.Decode<mirror::ClassLoader>(class_loader)));
     ObjPtr<mirror::Class> klass = class_linker->FindClass(self, clazz.c_str(), h_loader);
     ASSERT_NE(klass, nullptr);

     const auto pointer_size = class_linker->GetImagePointerSize();
     size_t number_of_compiled_methods = 0;
     for (auto& m : klass->GetVirtualMethods(pointer_size)) {
       std::string name = m.PrettyMethod(true);
       const void* code = m.GetEntryPointFromQuickCompiledCodePtrSize(pointer_size);
       ASSERT_NE(code, nullptr);
       if (expected_methods.find(name) != expected_methods.end()) {
         number_of_compiled_methods++;
         EXPECT_FALSE(class_linker->IsQuickToInterpreterBridge(code));
       } else {
         EXPECT_TRUE(class_linker->IsQuickToInterpreterBridge(code));
       }
     }
     EXPECT_EQ(expected_methods.size(), number_of_compiled_methods);
   }

  private:
   ProfileCompilationInfo profile_info_;
 };

 TEST_F(CompilerDriverProfileTest, ProfileGuidedCompilation) {
   Thread* self = Thread::Current();
   jobject class_loader;
   {
     ScopedObjectAccess soa(self);
     class_loader = LoadDex("ProfileTestMultiDex");
   }
   ASSERT_NE(class_loader, nullptr);

   // Need to enable dex-file writability. Methods rejected to be compiled will run through the
   // dex-to-dex compiler.
   for (const DexFile* dex_file : GetDexFiles(class_loader)) {
     ASSERT_TRUE(dex_file->EnableWrite());
   }

   CompileAll(class_loader);

   std::unordered_set<std::string> m = GetExpectedMethodsForClass("Main");
   std::unordered_set<std::string> s = GetExpectedMethodsForClass("Second");
   CheckCompiledMethods(class_loader, "LMain;", m);
   CheckCompiledMethods(class_loader, "LSecond;", s);
 }

 // Test that a verify only compiler filter updates the CompiledClass map,
 // which will be used for OatClass.
 class CompilerDriverVerifyTest : public CompilerDriverTest {
  protected:
   CompilerFilter::Filter GetCompilerFilter() const OVERRIDE {
     return CompilerFilter::kVerify;
   }

   void CheckVerifiedClass(jobject class_loader, const std::string& clazz) const {
     ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
     Thread* self = Thread::Current();
     ScopedObjectAccess soa(self);
     StackHandleScope<1> hs(self);
     Handle<mirror::ClassLoader> h_loader(
         hs.NewHandle(soa.Decode<mirror::ClassLoader>(class_loader)));
     ObjPtr<mirror::Class> klass = class_linker->FindClass(self, clazz.c_str(), h_loader);
     ASSERT_NE(klass, nullptr);
     EXPECT_TRUE(klass->IsVerified());

     ClassStatus status;
     bool found = compiler_driver_->GetCompiledClass(
         ClassReference(&klass->GetDexFile(), klass->GetDexTypeIndex().index_), &status);
     ASSERT_TRUE(found);
     EXPECT_EQ(status, ClassStatus::kVerified);
   }
 };

 TEST_F(CompilerDriverVerifyTest, VerifyCompilation) {
   Thread* self = Thread::Current();
   jobject class_loader;
   {
     ScopedObjectAccess soa(self);
     class_loader = LoadDex("ProfileTestMultiDex");
   }
   ASSERT_NE(class_loader, nullptr);

   CompileAll(class_loader);

   CheckVerifiedClass(class_loader, "LMain;");
   CheckVerifiedClass(class_loader, "LSecond;");
 }

 // Test that a class of status ClassStatus::kRetryVerificationAtRuntime is indeed
 // recorded that way in the driver.
 TEST_F(CompilerDriverVerifyTest, RetryVerifcationStatusCheckVerified) {
   Thread* const self = Thread::Current();
   jobject class_loader;
   std::vector<const DexFile*> dex_files;
   const DexFile* dex_file = nullptr;
   {
     ScopedObjectAccess soa(self);
     class_loader = LoadDex("ProfileTestMultiDex");
     ASSERT_NE(class_loader, nullptr);
     dex_files = GetDexFiles(class_loader);
     ASSERT_GT(dex_files.size(), 0u);
     dex_file = dex_files.front();
   }
   SetDexFilesForOatFile(dex_files);
   callbacks_->SetDoesClassUnloading(true, compiler_driver_.get());
   ClassReference ref(dex_file, 0u);
   // Test that the status is read from the compiler driver as expected.
   static_assert(enum_cast<size_t>(ClassStatus::kLast) < std::numeric_limits<size_t>::max(),
                 "Make sure incrementing the class status does not overflow.");
   for (size_t i = enum_cast<size_t>(ClassStatus::kRetryVerificationAtRuntime);
        i <= enum_cast<size_t>(ClassStatus::kLast);
        ++i) {
     const ClassStatus expected_status = enum_cast<ClassStatus>(i);
     // Skip unsupported status that are not supposed to be ever recorded.
     if (expected_status == ClassStatus::kVerifyingAtRuntime ||
         expected_status == ClassStatus::kInitializing) {
       continue;
     }
     compiler_driver_->RecordClassStatus(ref, expected_status);
     ClassStatus status = {};
     ASSERT_TRUE(compiler_driver_->GetCompiledClass(ref, &status));
     EXPECT_EQ(status, expected_status);
   }
 }

 // TODO: need check-cast test (when stub complete & we can throw/catch

 }  // namespace art
	/*
	* Copyright (C) 2011 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 "driver/compiler_driver.h"

	#include <limits>
	#include <stdint.h>
	#include <stdio.h>
	#include <memory>

	#include "art_method-inl.h"
	#include "base/casts.h"
	#include "class_linker-inl.h"
	#include "common_compiler_test.h"
	#include "compiler_callbacks.h"
	#include "dex/dex_file.h"
	#include "dex/dex_file_types.h"
	#include "gc/heap.h"
	#include "handle_scope-inl.h"
	#include "mirror/class-inl.h"
	#include "mirror/class_loader.h"
	#include "mirror/dex_cache-inl.h"
	#include "mirror/object-inl.h"
	#include "mirror/object_array-inl.h"
	#include "profile/profile_compilation_info.h"
	#include "scoped_thread_state_change-inl.h"

	namespace art {

	class CompilerDriverTest : public CommonCompilerTest {
	protected:
	void CompileAll(jobject class_loader) REQUIRES(!Locks::mutator_lock_) {
	TimingLogger timings("CompilerDriverTest::CompileAll", false, false);
	TimingLogger::ScopedTiming t(__FUNCTION__, &timings);
	dex_files_ = GetDexFiles(class_loader);
	SetDexFilesForOatFile(dex_files_);
	compiler_driver_->CompileAll(class_loader, dex_files_, &timings);
	t.NewTiming("MakeAllExecutable");
	MakeAllExecutable(class_loader);
	}

	void EnsureCompiled(jobject class_loader, const char* class_name, const char* method,
	const char* signature, bool is_virtual)
	REQUIRES(!Locks::mutator_lock_) {
	CompileAll(class_loader);
	Thread::Current()->TransitionFromSuspendedToRunnable();
	bool started = runtime_->Start();
	CHECK(started);
	env_ = Thread::Current()->GetJniEnv();
	class_ = env_->FindClass(class_name);
	CHECK(class_ != nullptr) << "Class not found: " << class_name;
	if (is_virtual) {
	mid_ = env_->GetMethodID(class_, method, signature);
	} else {
	mid_ = env_->GetStaticMethodID(class_, method, signature);
	}
	CHECK(mid_ != nullptr) << "Method not found: " << class_name << "." << method << signature;
	}

	void MakeAllExecutable(jobject class_loader) {
	const std::vector<const DexFile*> class_path = GetDexFiles(class_loader);
	for (size_t i = 0; i != class_path.size(); ++i) {
	const DexFile* dex_file = class_path[i];
	CHECK(dex_file != nullptr);
	MakeDexFileExecutable(class_loader, *dex_file);
	}
	}

	void MakeDexFileExecutable(jobject class_loader, const DexFile& dex_file) {
	ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
	for (size_t i = 0; i < dex_file.NumClassDefs(); i++) {
	const DexFile::ClassDef& class_def = dex_file.GetClassDef(i);
	const char* descriptor = dex_file.GetClassDescriptor(class_def);
	ScopedObjectAccess soa(Thread::Current());
	StackHandleScope<1> hs(soa.Self());
	Handle<mirror::ClassLoader> loader(
	hs.NewHandle(soa.Decode<mirror::ClassLoader>(class_loader)));
	ObjPtr<mirror::Class> c = class_linker->FindClass(soa.Self(), descriptor, loader);
	CHECK(c != nullptr);
	const auto pointer_size = class_linker->GetImagePointerSize();
	for (auto& m : c->GetMethods(pointer_size)) {
	MakeExecutable(&m);
	}
	}
	}

	JNIEnv* env_;
	jclass class_;
	jmethodID mid_;
	std::vector<const DexFile*> dex_files_;
	};

	// Disabled due to 10 second runtime on host
	// TODO: Update the test for hash-based dex cache arrays. Bug: 30627598
	TEST_F(CompilerDriverTest, DISABLED_LARGE_CompileDexLibCore) {
	CompileAll(nullptr);

	// All libcore references should resolve
	ScopedObjectAccess soa(Thread::Current());
	ASSERT_TRUE(java_lang_dex_file_ != nullptr);
	const DexFile& dex = *java_lang_dex_file_;
	ObjPtr<mirror::DexCache> dex_cache = class_linker_->FindDexCache(soa.Self(), dex);
	EXPECT_EQ(dex.NumStringIds(), dex_cache->NumStrings());
	for (size_t i = 0; i < dex_cache->NumStrings(); i++) {
	const ObjPtr<mirror::String> string = dex_cache->GetResolvedString(dex::StringIndex(i));
	EXPECT_TRUE(string != nullptr) << "string_idx=" << i;
	}
	EXPECT_EQ(dex.NumTypeIds(), dex_cache->NumResolvedTypes());
	for (size_t i = 0; i < dex_cache->NumResolvedTypes(); i++) {
	const ObjPtr<mirror::Class> type = dex_cache->GetResolvedType(dex::TypeIndex(i));
	EXPECT_TRUE(type != nullptr)
	<< "type_idx=" << i << " " << dex.GetTypeDescriptor(dex.GetTypeId(dex::TypeIndex(i)));
	}
	EXPECT_TRUE(dex_cache->StaticMethodSize() == dex_cache->NumResolvedMethods()
	\|\| dex.NumMethodIds() == dex_cache->NumResolvedMethods());
	auto* cl = Runtime::Current()->GetClassLinker();
	auto pointer_size = cl->GetImagePointerSize();
	for (size_t i = 0; i < dex_cache->NumResolvedMethods(); i++) {
	// FIXME: This is outdated for hash-based method array.
	ArtMethod* method = dex_cache->GetResolvedMethod(i, pointer_size);
	EXPECT_TRUE(method != nullptr) << "method_idx=" << i
	<< " " << dex.GetMethodDeclaringClassDescriptor(dex.GetMethodId(i))
	<< " " << dex.GetMethodName(dex.GetMethodId(i));
	EXPECT_TRUE(method->GetEntryPointFromQuickCompiledCode() != nullptr) << "method_idx=" << i
	<< " " << dex.GetMethodDeclaringClassDescriptor(dex.GetMethodId(i)) << " "
	<< dex.GetMethodName(dex.GetMethodId(i));
	}
	EXPECT_TRUE(dex_cache->StaticArtFieldSize() == dex_cache->NumResolvedFields()
	\|\| dex.NumFieldIds() == dex_cache->NumResolvedFields());
	for (size_t i = 0; i < dex_cache->NumResolvedFields(); i++) {
	// FIXME: This is outdated for hash-based field array.
	ArtField* field = dex_cache->GetResolvedField(i, cl->GetImagePointerSize());
	EXPECT_TRUE(field != nullptr) << "field_idx=" << i
	<< " " << dex.GetFieldDeclaringClassDescriptor(dex.GetFieldId(i))
	<< " " << dex.GetFieldName(dex.GetFieldId(i));
	}

	// TODO check Class::IsVerified for all classes

	// TODO: check that all Method::GetCode() values are non-null
	}

	TEST_F(CompilerDriverTest, AbstractMethodErrorStub) {
	jobject class_loader;
	{
	ScopedObjectAccess soa(Thread::Current());
	class_loader = LoadDex("AbstractMethod");
	}
	ASSERT_TRUE(class_loader != nullptr);
	EnsureCompiled(class_loader, "AbstractClass", "foo", "()V", true);

	// Create a jobj_ of ConcreteClass, NOT AbstractClass.
	jclass c_class = env_->FindClass("ConcreteClass");

	jmethodID constructor = env_->GetMethodID(c_class, "<init>", "()V");

	jobject jobj_ = env_->NewObject(c_class, constructor);
	ASSERT_TRUE(jobj_ != nullptr);

	// Force non-virtual call to AbstractClass foo, will throw AbstractMethodError exception.
	env_->CallNonvirtualVoidMethod(jobj_, class_, mid_);

	EXPECT_EQ(env_->ExceptionCheck(), JNI_TRUE);
	jthrowable exception = env_->ExceptionOccurred();
	env_->ExceptionClear();
	jclass jlame = env_->FindClass("java/lang/AbstractMethodError");
	EXPECT_TRUE(env_->IsInstanceOf(exception, jlame));
	{
	ScopedObjectAccess soa(Thread::Current());
	Thread::Current()->ClearException();
	}
	}

	class CompilerDriverProfileTest : public CompilerDriverTest {
	protected:
	ProfileCompilationInfo* GetProfileCompilationInfo() OVERRIDE {
	ScopedObjectAccess soa(Thread::Current());
	std::vector<std::unique_ptr<const DexFile>> dex_files = OpenTestDexFiles("ProfileTestMultiDex");

	ProfileCompilationInfo info;
	for (const std::unique_ptr<const DexFile>& dex_file : dex_files) {
	profile_info_.AddMethodIndex(ProfileCompilationInfo::MethodHotness::kFlagHot,
	MethodReference(dex_file.get(), 1));
	profile_info_.AddMethodIndex(ProfileCompilationInfo::MethodHotness::kFlagHot,
	MethodReference(dex_file.get(), 2));
	}
	return &profile_info_;
	}

	CompilerFilter::Filter GetCompilerFilter() const OVERRIDE {
	// Use a profile based filter.
	return CompilerFilter::kSpeedProfile;
	}

	std::unordered_set<std::string> GetExpectedMethodsForClass(const std::string& clazz) {
	if (clazz == "Main") {
	return std::unordered_set<std::string>({
	"java.lang.String Main.getA()",
	"java.lang.String Main.getB()"});
	} else if (clazz == "Second") {
	return std::unordered_set<std::string>({
	"java.lang.String Second.getX()",
	"java.lang.String Second.getY()"});
	} else {
	return std::unordered_set<std::string>();
	}
	}

	void CheckCompiledMethods(jobject class_loader,
	const std::string& clazz,
	const std::unordered_set<std::string>& expected_methods) {
	ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
	Thread* self = Thread::Current();
	ScopedObjectAccess soa(self);
	StackHandleScope<1> hs(self);
	Handle<mirror::ClassLoader> h_loader(
	hs.NewHandle(soa.Decode<mirror::ClassLoader>(class_loader)));
	ObjPtr<mirror::Class> klass = class_linker->FindClass(self, clazz.c_str(), h_loader);
	ASSERT_NE(klass, nullptr);

	const auto pointer_size = class_linker->GetImagePointerSize();
	size_t number_of_compiled_methods = 0;
	for (auto& m : klass->GetVirtualMethods(pointer_size)) {
	std::string name = m.PrettyMethod(true);
	const void* code = m.GetEntryPointFromQuickCompiledCodePtrSize(pointer_size);
	ASSERT_NE(code, nullptr);
	if (expected_methods.find(name) != expected_methods.end()) {
	number_of_compiled_methods++;
	EXPECT_FALSE(class_linker->IsQuickToInterpreterBridge(code));
	} else {
	EXPECT_TRUE(class_linker->IsQuickToInterpreterBridge(code));
	}
	}
	EXPECT_EQ(expected_methods.size(), number_of_compiled_methods);
	}

	private:
	ProfileCompilationInfo profile_info_;
	};

	TEST_F(CompilerDriverProfileTest, ProfileGuidedCompilation) {
	Thread* self = Thread::Current();
	jobject class_loader;
	{
	ScopedObjectAccess soa(self);
	class_loader = LoadDex("ProfileTestMultiDex");
	}
	ASSERT_NE(class_loader, nullptr);

	// Need to enable dex-file writability. Methods rejected to be compiled will run through the
	// dex-to-dex compiler.
	for (const DexFile* dex_file : GetDexFiles(class_loader)) {
	ASSERT_TRUE(dex_file->EnableWrite());
	}

	CompileAll(class_loader);

	std::unordered_set<std::string> m = GetExpectedMethodsForClass("Main");
	std::unordered_set<std::string> s = GetExpectedMethodsForClass("Second");
	CheckCompiledMethods(class_loader, "LMain;", m);
	CheckCompiledMethods(class_loader, "LSecond;", s);
	}

	// Test that a verify only compiler filter updates the CompiledClass map,
	// which will be used for OatClass.
	class CompilerDriverVerifyTest : public CompilerDriverTest {
	protected:
	CompilerFilter::Filter GetCompilerFilter() const OVERRIDE {
	return CompilerFilter::kVerify;
	}

	void CheckVerifiedClass(jobject class_loader, const std::string& clazz) const {
	ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
	Thread* self = Thread::Current();
	ScopedObjectAccess soa(self);
	StackHandleScope<1> hs(self);
	Handle<mirror::ClassLoader> h_loader(
	hs.NewHandle(soa.Decode<mirror::ClassLoader>(class_loader)));
	ObjPtr<mirror::Class> klass = class_linker->FindClass(self, clazz.c_str(), h_loader);
	ASSERT_NE(klass, nullptr);
	EXPECT_TRUE(klass->IsVerified());

	ClassStatus status;
	bool found = compiler_driver_->GetCompiledClass(
	ClassReference(&klass->GetDexFile(), klass->GetDexTypeIndex().index_), &status);
	ASSERT_TRUE(found);
	EXPECT_EQ(status, ClassStatus::kVerified);
	}
	};

	TEST_F(CompilerDriverVerifyTest, VerifyCompilation) {
	Thread* self = Thread::Current();
	jobject class_loader;
	{
	ScopedObjectAccess soa(self);
	class_loader = LoadDex("ProfileTestMultiDex");
	}
	ASSERT_NE(class_loader, nullptr);

	CompileAll(class_loader);

	CheckVerifiedClass(class_loader, "LMain;");
	CheckVerifiedClass(class_loader, "LSecond;");
	}

	// Test that a class of status ClassStatus::kRetryVerificationAtRuntime is indeed
	// recorded that way in the driver.
	TEST_F(CompilerDriverVerifyTest, RetryVerifcationStatusCheckVerified) {
	Thread* const self = Thread::Current();
	jobject class_loader;
	std::vector<const DexFile*> dex_files;
	const DexFile* dex_file = nullptr;
	{
	ScopedObjectAccess soa(self);
	class_loader = LoadDex("ProfileTestMultiDex");
	ASSERT_NE(class_loader, nullptr);
	dex_files = GetDexFiles(class_loader);
	ASSERT_GT(dex_files.size(), 0u);
	dex_file = dex_files.front();
	}
	SetDexFilesForOatFile(dex_files);
	callbacks_->SetDoesClassUnloading(true, compiler_driver_.get());
	ClassReference ref(dex_file, 0u);
	// Test that the status is read from the compiler driver as expected.
	static_assert(enum_cast<size_t>(ClassStatus::kLast) < std::numeric_limits<size_t>::max(),
	"Make sure incrementing the class status does not overflow.");
	for (size_t i = enum_cast<size_t>(ClassStatus::kRetryVerificationAtRuntime);
	i <= enum_cast<size_t>(ClassStatus::kLast);
	++i) {
	const ClassStatus expected_status = enum_cast<ClassStatus>(i);
	// Skip unsupported status that are not supposed to be ever recorded.
	if (expected_status == ClassStatus::kVerifyingAtRuntime \|\|
	expected_status == ClassStatus::kInitializing) {
	continue;
	}
	compiler_driver_->RecordClassStatus(ref, expected_status);
	ClassStatus status = {};
	ASSERT_TRUE(compiler_driver_->GetCompiledClass(ref, &status));
	EXPECT_EQ(status, expected_status);
	}
	}

	// TODO: need check-cast test (when stub complete & we can throw/catch

	} // namespace art