runtime/method_handles_test.cc - platform/art - Gitiles

 /*
  * Copyright (C) 2018 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 "method_handles.h"

 #include "class_linker-inl.h"
 #include "class_root-inl.h"
 #include "common_runtime_test.h"
 #include "handle_scope-inl.h"
 #include "jvalue-inl.h"
 #include "mirror/method_type.h"
 #include "mirror/object_array-alloc-inl.h"
 #include "mirror/object_array-inl.h"
 #include "reflection.h"
 #include "scoped_thread_state_change-inl.h"
 #include "thread-current-inl.h"

 namespace art {

 namespace {
   bool IsClassCastException(ObjPtr<mirror::Throwable> throwable)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     return throwable->GetClass()->DescriptorEquals("Ljava/lang/ClassCastException;");
   }

   bool IsNullPointerException(ObjPtr<mirror::Throwable> throwable)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     return throwable->GetClass()->DescriptorEquals("Ljava/lang/NullPointerException;");
   }

   bool IsWrongMethodTypeException(ObjPtr<mirror::Throwable> throwable)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     return throwable->GetClass()->DescriptorEquals("Ljava/lang/invoke/WrongMethodTypeException;");
   }

   static ObjPtr<mirror::MethodType> CreateVoidMethodType(Thread* self,
                                                          Handle<mirror::Class> parameter_type)
         REQUIRES_SHARED(Locks::mutator_lock_) {
     ClassLinker* cl = Runtime::Current()->GetClassLinker();
     StackHandleScope<2> hs(self);
     ObjPtr<mirror::Class> class_array_type = GetClassRoot<mirror::ObjectArray<mirror::Class>>(cl);
     auto parameter_types = hs.NewHandle(
         mirror::ObjectArray<mirror::Class>::Alloc(self, class_array_type, 1));
     parameter_types->Set(0, parameter_type.Get());
     Handle<mirror::Class> void_class = hs.NewHandle(GetClassRoot(ClassRoot::kPrimitiveVoid, cl));
     return mirror::MethodType::Create(self, void_class, parameter_types);
   }

   static bool TryConversion(Thread* self,
                             Handle<mirror::Class> from,
                             Handle<mirror::Class> to,
                             JValue* value)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     StackHandleScope<2> hs(self);
     Handle<mirror::MethodType> from_mt = hs.NewHandle(CreateVoidMethodType(self, from));
     Handle<mirror::MethodType> to_mt = hs.NewHandle(CreateVoidMethodType(self, to));
     return ConvertJValueCommon(from_mt, to_mt, from.Get(), to.Get(), value);
   }
 }  // namespace

 class MethodHandlesTest : public CommonRuntimeTest {};

 //
 // Primitive -> Primitive Conversions
 //

 TEST_F(MethodHandlesTest, SupportedPrimitiveWideningBI) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('B'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
   JValue value = JValue::FromPrimitive(static_cast<int8_t>(3));
   ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_EQ(3, value.GetI());
   ASSERT_FALSE(soa.Self()->IsExceptionPending());
 }

 TEST_F(MethodHandlesTest, SupportedPrimitiveWideningCJ) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('C'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('J'));
   uint16_t raw_value = 0x8000;
   JValue value = JValue::FromPrimitive(raw_value);
   ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_FALSE(soa.Self()->IsExceptionPending());
   ASSERT_EQ(static_cast<int64_t>(raw_value), value.GetJ());
 }

 TEST_F(MethodHandlesTest, SupportedPrimitiveWideningIF) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('F'));
   JValue value = JValue::FromPrimitive(-16);
   ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_FALSE(soa.Self()->IsExceptionPending());
   ASSERT_FLOAT_EQ(-16.0f, value.GetF());
 }

 TEST_F(MethodHandlesTest, UnsupportedPrimitiveWideningBC) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('B'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('C'));
   JValue value;
   value.SetB(0);
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 TEST_F(MethodHandlesTest, UnsupportedPrimitiveWideningSC) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('S'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('C'));
   JValue value;
   value.SetS(0x1234);
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 TEST_F(MethodHandlesTest, UnsupportedPrimitiveWideningDJ) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('D'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('J'));
   JValue value;
   value.SetD(1e72);
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 TEST_F(MethodHandlesTest, UnsupportedPrimitiveWideningZI) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('Z'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
   JValue value;
   value.SetZ(true);
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 //
 // Reference -> Reference Conversions
 //

 TEST_F(MethodHandlesTest, SupportedReferenceCast) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<3> hs(soa.Self());
   static const int32_t kInitialValue = 101;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimInt, value));
   Handle<mirror::Class> from = hs.NewHandle(boxed_value->GetClass());
   Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Number;"));
   value.SetL(boxed_value.Get());
   ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_FALSE(soa.Self()->IsExceptionPending());
   JValue unboxed_value;
   ASSERT_TRUE(UnboxPrimitiveForResult(value.GetL(), cl->FindPrimitiveClass('I'), &unboxed_value));
   ASSERT_EQ(kInitialValue, unboxed_value.GetI());
 }

 TEST_F(MethodHandlesTest, UnsupportedReferenceCast) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<3> hs(soa.Self());
   JValue value = JValue::FromPrimitive(3.733e2);
   Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimDouble, value));
   Handle<mirror::Class> from = hs.NewHandle(boxed_value->GetClass());
   Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
   value.SetL(boxed_value.Get());
   ASSERT_FALSE(soa.Self()->IsExceptionPending());
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsClassCastException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 //
 // Primitive -> Reference Conversions
 //

 TEST_F(MethodHandlesTest, SupportedPrimitiveConversionPrimitiveToBoxed) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   const int32_t kInitialValue = 1;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
   ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_FALSE(soa.Self()->IsExceptionPending());
   JValue unboxed_to_value;
   ASSERT_TRUE(UnboxPrimitiveForResult(value.GetL(), from.Get(), &unboxed_to_value));
   ASSERT_EQ(kInitialValue, unboxed_to_value.GetI());
 }

 TEST_F(MethodHandlesTest, SupportedPrimitiveConversionPrimitiveToBoxedSuper) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   const int32_t kInitialValue = 1;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Number;"));
   ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_FALSE(soa.Self()->IsExceptionPending());
   JValue unboxed_to_value;
   ASSERT_TRUE(UnboxPrimitiveForResult(value.GetL(), from.Get(), &unboxed_to_value));
   ASSERT_EQ(kInitialValue, unboxed_to_value.GetI());
 }

 TEST_F(MethodHandlesTest, UnsupportedPrimitiveConversionNotBoxable) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   const int32_t kInitialValue = 1;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Runtime;"));
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 TEST_F(MethodHandlesTest, UnsupportedPrimitiveConversionPrimitiveToBoxedWider) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   const int32_t kInitialValue = 1;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Long;"));
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 TEST_F(MethodHandlesTest, UnsupportedPrimitiveConversionPrimitiveToBoxedNarrower) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   const int32_t kInitialValue = 1;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Byte;"));
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 //
 // Reference -> Primitive Conversions
 //

 TEST_F(MethodHandlesTest, SupportedBoxedToPrimitiveConversion) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<3> hs(soa.Self());
   const int32_t kInitialValue = 101;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimInt, value));
   Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
   value.SetL(boxed_value.Get());
   ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_FALSE(soa.Self()->IsExceptionPending());
   ASSERT_EQ(kInitialValue, value.GetI());
 }

 TEST_F(MethodHandlesTest, SupportedBoxedToWiderPrimitiveConversion) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<3> hs(soa.Self());
   static const int32_t kInitialValue = 101;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimInt, value));
   Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('J'));
   value.SetL(boxed_value.Get());
   ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_EQ(kInitialValue, value.GetJ());
 }

 TEST_F(MethodHandlesTest, UnsupportedNullBoxedToPrimitiveConversion) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<3> hs(soa.Self());
   JValue value = JValue::FromPrimitive(101);
   ScopedNullHandle<mirror::Object> boxed_value;
   Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
   value.SetL(boxed_value.Get());
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsNullPointerException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 TEST_F(MethodHandlesTest, UnsupportedNotBoxReferenceToPrimitiveConversion) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<2> hs(soa.Self());
   Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Class;"));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
   // Set value to be converted as some non-primitive type.
   JValue value;
   value.SetL(cl->FindPrimitiveClass('V'));
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 TEST_F(MethodHandlesTest, UnsupportedBoxedToNarrowerPrimitiveConversionNoCast) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<3> hs(soa.Self());
   static const int32_t kInitialValue = 101;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimInt, value));
   Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('S'));
   value.SetL(boxed_value.Get());
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 TEST_F(MethodHandlesTest, UnsupportedBoxedToNarrowerPrimitiveConversionWithCast) {
   ScopedObjectAccess soa(Thread::Current());
   ClassLinker* cl = Runtime::Current()->GetClassLinker();
   StackHandleScope<3> hs(soa.Self());
   static const double kInitialValue = 1e77;
   JValue value = JValue::FromPrimitive(kInitialValue);
   Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimDouble, value));
   Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Number;"));
   Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('F'));
   value.SetL(boxed_value.Get());
   ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
   ASSERT_TRUE(soa.Self()->IsExceptionPending());
   ASSERT_TRUE(IsClassCastException(soa.Self()->GetException()));
   soa.Self()->ClearException();
 }

 }  // namespace art
	/*
	* Copyright (C) 2018 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 "method_handles.h"

	#include "class_linker-inl.h"
	#include "class_root-inl.h"
	#include "common_runtime_test.h"
	#include "handle_scope-inl.h"
	#include "jvalue-inl.h"
	#include "mirror/method_type.h"
	#include "mirror/object_array-alloc-inl.h"
	#include "mirror/object_array-inl.h"
	#include "reflection.h"
	#include "scoped_thread_state_change-inl.h"
	#include "thread-current-inl.h"

	namespace art {

	namespace {
	bool IsClassCastException(ObjPtr<mirror::Throwable> throwable)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	return throwable->GetClass()->DescriptorEquals("Ljava/lang/ClassCastException;");
	}

	bool IsNullPointerException(ObjPtr<mirror::Throwable> throwable)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	return throwable->GetClass()->DescriptorEquals("Ljava/lang/NullPointerException;");
	}

	bool IsWrongMethodTypeException(ObjPtr<mirror::Throwable> throwable)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	return throwable->GetClass()->DescriptorEquals("Ljava/lang/invoke/WrongMethodTypeException;");
	}

	static ObjPtr<mirror::MethodType> CreateVoidMethodType(Thread* self,
	Handle<mirror::Class> parameter_type)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(self);
	ObjPtr<mirror::Class> class_array_type = GetClassRoot<mirror::ObjectArray<mirror::Class>>(cl);
	auto parameter_types = hs.NewHandle(
	mirror::ObjectArray<mirror::Class>::Alloc(self, class_array_type, 1));
	parameter_types->Set(0, parameter_type.Get());
	Handle<mirror::Class> void_class = hs.NewHandle(GetClassRoot(ClassRoot::kPrimitiveVoid, cl));
	return mirror::MethodType::Create(self, void_class, parameter_types);
	}

	static bool TryConversion(Thread* self,
	Handle<mirror::Class> from,
	Handle<mirror::Class> to,
	JValue* value)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	StackHandleScope<2> hs(self);
	Handle<mirror::MethodType> from_mt = hs.NewHandle(CreateVoidMethodType(self, from));
	Handle<mirror::MethodType> to_mt = hs.NewHandle(CreateVoidMethodType(self, to));
	return ConvertJValueCommon(from_mt, to_mt, from.Get(), to.Get(), value);
	}
	} // namespace

	class MethodHandlesTest : public CommonRuntimeTest {};

	//
	// Primitive -> Primitive Conversions
	//

	TEST_F(MethodHandlesTest, SupportedPrimitiveWideningBI) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('B'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
	JValue value = JValue::FromPrimitive(static_cast<int8_t>(3));
	ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_EQ(3, value.GetI());
	ASSERT_FALSE(soa.Self()->IsExceptionPending());
	}

	TEST_F(MethodHandlesTest, SupportedPrimitiveWideningCJ) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('C'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('J'));
	uint16_t raw_value = 0x8000;
	JValue value = JValue::FromPrimitive(raw_value);
	ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_FALSE(soa.Self()->IsExceptionPending());
	ASSERT_EQ(static_cast<int64_t>(raw_value), value.GetJ());
	}

	TEST_F(MethodHandlesTest, SupportedPrimitiveWideningIF) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('F'));
	JValue value = JValue::FromPrimitive(-16);
	ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_FALSE(soa.Self()->IsExceptionPending());
	ASSERT_FLOAT_EQ(-16.0f, value.GetF());
	}

	TEST_F(MethodHandlesTest, UnsupportedPrimitiveWideningBC) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('B'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('C'));
	JValue value;
	value.SetB(0);
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	TEST_F(MethodHandlesTest, UnsupportedPrimitiveWideningSC) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('S'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('C'));
	JValue value;
	value.SetS(0x1234);
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	TEST_F(MethodHandlesTest, UnsupportedPrimitiveWideningDJ) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('D'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('J'));
	JValue value;
	value.SetD(1e72);
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	TEST_F(MethodHandlesTest, UnsupportedPrimitiveWideningZI) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('Z'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
	JValue value;
	value.SetZ(true);
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	//
	// Reference -> Reference Conversions
	//

	TEST_F(MethodHandlesTest, SupportedReferenceCast) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<3> hs(soa.Self());
	static const int32_t kInitialValue = 101;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimInt, value));
	Handle<mirror::Class> from = hs.NewHandle(boxed_value->GetClass());
	Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Number;"));
	value.SetL(boxed_value.Get());
	ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_FALSE(soa.Self()->IsExceptionPending());
	JValue unboxed_value;
	ASSERT_TRUE(UnboxPrimitiveForResult(value.GetL(), cl->FindPrimitiveClass('I'), &unboxed_value));
	ASSERT_EQ(kInitialValue, unboxed_value.GetI());
	}

	TEST_F(MethodHandlesTest, UnsupportedReferenceCast) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<3> hs(soa.Self());
	JValue value = JValue::FromPrimitive(3.733e2);
	Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimDouble, value));
	Handle<mirror::Class> from = hs.NewHandle(boxed_value->GetClass());
	Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
	value.SetL(boxed_value.Get());
	ASSERT_FALSE(soa.Self()->IsExceptionPending());
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsClassCastException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	//
	// Primitive -> Reference Conversions
	//

	TEST_F(MethodHandlesTest, SupportedPrimitiveConversionPrimitiveToBoxed) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	const int32_t kInitialValue = 1;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
	ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_FALSE(soa.Self()->IsExceptionPending());
	JValue unboxed_to_value;
	ASSERT_TRUE(UnboxPrimitiveForResult(value.GetL(), from.Get(), &unboxed_to_value));
	ASSERT_EQ(kInitialValue, unboxed_to_value.GetI());
	}

	TEST_F(MethodHandlesTest, SupportedPrimitiveConversionPrimitiveToBoxedSuper) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	const int32_t kInitialValue = 1;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Number;"));
	ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_FALSE(soa.Self()->IsExceptionPending());
	JValue unboxed_to_value;
	ASSERT_TRUE(UnboxPrimitiveForResult(value.GetL(), from.Get(), &unboxed_to_value));
	ASSERT_EQ(kInitialValue, unboxed_to_value.GetI());
	}

	TEST_F(MethodHandlesTest, UnsupportedPrimitiveConversionNotBoxable) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	const int32_t kInitialValue = 1;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Runtime;"));
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	TEST_F(MethodHandlesTest, UnsupportedPrimitiveConversionPrimitiveToBoxedWider) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	const int32_t kInitialValue = 1;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Long;"));
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	TEST_F(MethodHandlesTest, UnsupportedPrimitiveConversionPrimitiveToBoxedNarrower) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	const int32_t kInitialValue = 1;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Class> from = hs.NewHandle(cl->FindPrimitiveClass('I'));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Byte;"));
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	//
	// Reference -> Primitive Conversions
	//

	TEST_F(MethodHandlesTest, SupportedBoxedToPrimitiveConversion) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<3> hs(soa.Self());
	const int32_t kInitialValue = 101;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimInt, value));
	Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
	value.SetL(boxed_value.Get());
	ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_FALSE(soa.Self()->IsExceptionPending());
	ASSERT_EQ(kInitialValue, value.GetI());
	}

	TEST_F(MethodHandlesTest, SupportedBoxedToWiderPrimitiveConversion) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<3> hs(soa.Self());
	static const int32_t kInitialValue = 101;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimInt, value));
	Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('J'));
	value.SetL(boxed_value.Get());
	ASSERT_TRUE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_EQ(kInitialValue, value.GetJ());
	}

	TEST_F(MethodHandlesTest, UnsupportedNullBoxedToPrimitiveConversion) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<3> hs(soa.Self());
	JValue value = JValue::FromPrimitive(101);
	ScopedNullHandle<mirror::Object> boxed_value;
	Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
	value.SetL(boxed_value.Get());
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsNullPointerException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	TEST_F(MethodHandlesTest, UnsupportedNotBoxReferenceToPrimitiveConversion) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Class;"));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('I'));
	// Set value to be converted as some non-primitive type.
	JValue value;
	value.SetL(cl->FindPrimitiveClass('V'));
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	TEST_F(MethodHandlesTest, UnsupportedBoxedToNarrowerPrimitiveConversionNoCast) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<3> hs(soa.Self());
	static const int32_t kInitialValue = 101;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimInt, value));
	Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Integer;"));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('S'));
	value.SetL(boxed_value.Get());
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsWrongMethodTypeException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	TEST_F(MethodHandlesTest, UnsupportedBoxedToNarrowerPrimitiveConversionWithCast) {
	ScopedObjectAccess soa(Thread::Current());
	ClassLinker* cl = Runtime::Current()->GetClassLinker();
	StackHandleScope<3> hs(soa.Self());
	static const double kInitialValue = 1e77;
	JValue value = JValue::FromPrimitive(kInitialValue);
	Handle<mirror::Object> boxed_value = hs.NewHandle(BoxPrimitive(Primitive::kPrimDouble, value));
	Handle<mirror::Class> from = hs.NewHandle(cl->FindSystemClass(soa.Self(), "Ljava/lang/Number;"));
	Handle<mirror::Class> to = hs.NewHandle(cl->FindPrimitiveClass('F'));
	value.SetL(boxed_value.Get());
	ASSERT_FALSE(TryConversion(soa.Self(), from, to, &value));
	ASSERT_TRUE(soa.Self()->IsExceptionPending());
	ASSERT_TRUE(IsClassCastException(soa.Self()->GetException()));
	soa.Self()->ClearException();
	}

	} // namespace art