runtime/exception_test.cc - platform/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 <memory>

 #include "class_linker.h"
 #include "common_runtime_test.h"
 #include "dex_file.h"
 #include "dex_file-inl.h"
 #include "gtest/gtest.h"
 #include "leb128.h"
 #include "mirror/class-inl.h"
 #include "mirror/object_array-inl.h"
 #include "mirror/object-inl.h"
 #include "mirror/stack_trace_element.h"
 #include "oat_quick_method_header.h"
 #include "runtime.h"
 #include "scoped_thread_state_change.h"
 #include "handle_scope-inl.h"
 #include "thread.h"
 #include "vmap_table.h"

 namespace art {

 class ExceptionTest : public CommonRuntimeTest {
  protected:
   virtual void SetUp() {
     CommonRuntimeTest::SetUp();

     ScopedObjectAccess soa(Thread::Current());
     StackHandleScope<2> hs(soa.Self());
     Handle<mirror::ClassLoader> class_loader(
         hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("ExceptionHandle"))));
     my_klass_ = class_linker_->FindClass(soa.Self(), "LExceptionHandle;", class_loader);
     ASSERT_TRUE(my_klass_ != nullptr);
     Handle<mirror::Class> klass(hs.NewHandle(my_klass_));
     class_linker_->EnsureInitialized(soa.Self(), klass, true, true);
     my_klass_ = klass.Get();

     dex_ = my_klass_->GetDexCache()->GetDexFile();

     uint32_t code_size = 12;
     for (size_t i = 0 ; i < code_size; i++) {
       fake_code_.push_back(0x70 | i);
     }

     fake_mapping_data_.PushBackUnsigned(4);  // first element is count
     fake_mapping_data_.PushBackUnsigned(4);  // total (non-length) elements
     fake_mapping_data_.PushBackUnsigned(2);  // count of pc to dex elements
                                       // ---  pc to dex table
     fake_mapping_data_.PushBackUnsigned(3 - 0);  // offset 3
     fake_mapping_data_.PushBackSigned(3 - 0);    // maps to dex offset 3
                                       // ---  dex to pc table
     fake_mapping_data_.PushBackUnsigned(3 - 0);  // offset 3
     fake_mapping_data_.PushBackSigned(3 - 0);    // maps to dex offset 3

     fake_vmap_table_data_.PushBackUnsigned(0 + VmapTable::kEntryAdjustment);

     fake_gc_map_.push_back(0);  // 0 bytes to encode references and native pc offsets.
     fake_gc_map_.push_back(0);
     fake_gc_map_.push_back(0);  // 0 entries.
     fake_gc_map_.push_back(0);

     const std::vector<uint8_t>& fake_vmap_table_data = fake_vmap_table_data_.GetData();
     const std::vector<uint8_t>& fake_mapping_data = fake_mapping_data_.GetData();
     uint32_t vmap_table_offset = sizeof(OatQuickMethodHeader) + fake_vmap_table_data.size();
     uint32_t mapping_table_offset = vmap_table_offset + fake_mapping_data.size();
     uint32_t gc_map_offset = mapping_table_offset + fake_gc_map_.size();
     OatQuickMethodHeader method_header(mapping_table_offset, vmap_table_offset, gc_map_offset,
                                        4 * sizeof(void*), 0u, 0u, code_size);
     fake_header_code_and_maps_.resize(sizeof(method_header));
     memcpy(&fake_header_code_and_maps_[0], &method_header, sizeof(method_header));
     fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(),
                                       fake_vmap_table_data.begin(), fake_vmap_table_data.end());
     fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(),
                                       fake_mapping_data.begin(), fake_mapping_data.end());
     fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(),
                                       fake_gc_map_.begin(), fake_gc_map_.end());
     fake_header_code_and_maps_.insert(fake_header_code_and_maps_.end(),
                                       fake_code_.begin(), fake_code_.end());

     // Align the code.
     const size_t alignment = GetInstructionSetAlignment(kRuntimeISA);
     fake_header_code_and_maps_.reserve(fake_header_code_and_maps_.size() + alignment);
     const void* unaligned_code_ptr =
         fake_header_code_and_maps_.data() + (fake_header_code_and_maps_.size() - code_size);
     size_t offset = dchecked_integral_cast<size_t>(reinterpret_cast<uintptr_t>(unaligned_code_ptr));
     size_t padding = RoundUp(offset, alignment) - offset;
     // Make sure no resizing takes place.
     CHECK_GE(fake_header_code_and_maps_.capacity(), fake_header_code_and_maps_.size() + padding);
     fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(), padding, 0);
     const void* code_ptr = reinterpret_cast<const uint8_t*>(unaligned_code_ptr) + padding;
     CHECK_EQ(code_ptr,
              static_cast<const void*>(fake_header_code_and_maps_.data() +
                                           (fake_header_code_and_maps_.size() - code_size)));

     if (kRuntimeISA == kArm) {
       // Check that the Thumb2 adjustment will be a NOP, see EntryPointToCodePointer().
       CHECK_ALIGNED(mapping_table_offset, 2);
     }

     method_f_ = my_klass_->FindVirtualMethod("f", "()I", sizeof(void*));
     ASSERT_TRUE(method_f_ != nullptr);
     method_f_->SetEntryPointFromQuickCompiledCode(code_ptr);

     method_g_ = my_klass_->FindVirtualMethod("g", "(I)V", sizeof(void*));
     ASSERT_TRUE(method_g_ != nullptr);
     method_g_->SetEntryPointFromQuickCompiledCode(code_ptr);
   }

   const DexFile* dex_;

   std::vector<uint8_t> fake_code_;
   Leb128EncodingVector<> fake_mapping_data_;
   Leb128EncodingVector<> fake_vmap_table_data_;
   std::vector<uint8_t> fake_gc_map_;
   std::vector<uint8_t> fake_header_code_and_maps_;

   ArtMethod* method_f_;
   ArtMethod* method_g_;

  private:
   mirror::Class* my_klass_;
 };

 TEST_F(ExceptionTest, FindCatchHandler) {
   ScopedObjectAccess soa(Thread::Current());
   const DexFile::CodeItem* code_item = dex_->GetCodeItem(method_f_->GetCodeItemOffset());

   ASSERT_TRUE(code_item != nullptr);

   ASSERT_EQ(2u, code_item->tries_size_);
   ASSERT_NE(0u, code_item->insns_size_in_code_units_);

   const DexFile::TryItem *t0, *t1;
   t0 = dex_->GetTryItems(*code_item, 0);
   t1 = dex_->GetTryItems(*code_item, 1);
   EXPECT_LE(t0->start_addr_, t1->start_addr_);
   {
     CatchHandlerIterator iter(*code_item, 4 /* Dex PC in the first try block */);
     EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
     ASSERT_TRUE(iter.HasNext());
     iter.Next();
     EXPECT_STREQ("Ljava/lang/Exception;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
     ASSERT_TRUE(iter.HasNext());
     iter.Next();
     EXPECT_FALSE(iter.HasNext());
   }
   {
     CatchHandlerIterator iter(*code_item, 8 /* Dex PC in the second try block */);
     EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
     ASSERT_TRUE(iter.HasNext());
     iter.Next();
     EXPECT_FALSE(iter.HasNext());
   }
   {
     CatchHandlerIterator iter(*code_item, 11 /* Dex PC not in any try block */);
     EXPECT_FALSE(iter.HasNext());
   }
 }

 TEST_F(ExceptionTest, StackTraceElement) {
   Thread* thread = Thread::Current();
   thread->TransitionFromSuspendedToRunnable();
   bool started = runtime_->Start();
   CHECK(started);
   JNIEnv* env = thread->GetJniEnv();
   ScopedObjectAccess soa(env);

   std::vector<uintptr_t> fake_stack;
   Runtime* r = Runtime::Current();
   r->SetInstructionSet(kRuntimeISA);
   ArtMethod* save_method = r->CreateCalleeSaveMethod();
   r->SetCalleeSaveMethod(save_method, Runtime::kSaveAll);
   QuickMethodFrameInfo frame_info = r->GetRuntimeMethodFrameInfo(save_method);

   ASSERT_EQ(kStackAlignment, 16U);
   // ASSERT_EQ(sizeof(uintptr_t), sizeof(uint32_t));


   // Create three fake stack frames with mapping data created in SetUp. We map offset 3 in the
   // code to dex pc 3.
   const uint32_t dex_pc = 3;

   // Create the stack frame for the callee save method, expected by the runtime.
   fake_stack.push_back(reinterpret_cast<uintptr_t>(save_method));
   for (size_t i = 0; i < frame_info.FrameSizeInBytes() - 2 * sizeof(uintptr_t);
        i += sizeof(uintptr_t)) {
     fake_stack.push_back(0);
   }

   fake_stack.push_back(method_g_->GetOatQuickMethodHeader(0)->ToNativeQuickPc(
       method_g_, dex_pc, /* is_catch_handler */ false));  // return pc

   // Create/push fake 16byte stack frame for method g
   fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
   fake_stack.push_back(0);
   fake_stack.push_back(0);
   fake_stack.push_back(method_g_->GetOatQuickMethodHeader(0)->ToNativeQuickPc(
       method_g_, dex_pc, /* is_catch_handler */ false));  // return pc

   // Create/push fake 16byte stack frame for method f
   fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
   fake_stack.push_back(0);
   fake_stack.push_back(0);
   fake_stack.push_back(0xEBAD6070);  // return pc

   // Push Method* of null to terminate the trace
   fake_stack.push_back(0);

   // Push null values which will become null incoming arguments.
   fake_stack.push_back(0);
   fake_stack.push_back(0);
   fake_stack.push_back(0);

   // Set up thread to appear as if we called out of method_g_ at pc dex 3
   thread->SetTopOfStack(reinterpret_cast<ArtMethod**>(&fake_stack[0]));

   jobject internal = thread->CreateInternalStackTrace<false>(soa);
   ASSERT_TRUE(internal != nullptr);
   jobjectArray ste_array = Thread::InternalStackTraceToStackTraceElementArray(soa, internal);
   ASSERT_TRUE(ste_array != nullptr);
   auto* trace_array = soa.Decode<mirror::ObjectArray<mirror::StackTraceElement>*>(ste_array);

   ASSERT_TRUE(trace_array != nullptr);
   ASSERT_TRUE(trace_array->Get(0) != nullptr);
   EXPECT_STREQ("ExceptionHandle",
                trace_array->Get(0)->GetDeclaringClass()->ToModifiedUtf8().c_str());
   EXPECT_STREQ("ExceptionHandle.java",
                trace_array->Get(0)->GetFileName()->ToModifiedUtf8().c_str());
   EXPECT_STREQ("g", trace_array->Get(0)->GetMethodName()->ToModifiedUtf8().c_str());
   EXPECT_EQ(37, trace_array->Get(0)->GetLineNumber());

   ASSERT_TRUE(trace_array->Get(1) != nullptr);
   EXPECT_STREQ("ExceptionHandle",
                trace_array->Get(1)->GetDeclaringClass()->ToModifiedUtf8().c_str());
   EXPECT_STREQ("ExceptionHandle.java",
                trace_array->Get(1)->GetFileName()->ToModifiedUtf8().c_str());
   EXPECT_STREQ("f", trace_array->Get(1)->GetMethodName()->ToModifiedUtf8().c_str());
   EXPECT_EQ(22, trace_array->Get(1)->GetLineNumber());

   thread->SetTopOfStack(nullptr);  // Disarm the assertion that no code is running when we detach.
 }

 }  // 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 <memory>

	#include "class_linker.h"
	#include "common_runtime_test.h"
	#include "dex_file.h"
	#include "dex_file-inl.h"
	#include "gtest/gtest.h"
	#include "leb128.h"
	#include "mirror/class-inl.h"
	#include "mirror/object_array-inl.h"
	#include "mirror/object-inl.h"
	#include "mirror/stack_trace_element.h"
	#include "oat_quick_method_header.h"
	#include "runtime.h"
	#include "scoped_thread_state_change.h"
	#include "handle_scope-inl.h"
	#include "thread.h"
	#include "vmap_table.h"

	namespace art {

	class ExceptionTest : public CommonRuntimeTest {
	protected:
	virtual void SetUp() {
	CommonRuntimeTest::SetUp();

	ScopedObjectAccess soa(Thread::Current());
	StackHandleScope<2> hs(soa.Self());
	Handle<mirror::ClassLoader> class_loader(
	hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("ExceptionHandle"))));
	my_klass_ = class_linker_->FindClass(soa.Self(), "LExceptionHandle;", class_loader);
	ASSERT_TRUE(my_klass_ != nullptr);
	Handle<mirror::Class> klass(hs.NewHandle(my_klass_));
	class_linker_->EnsureInitialized(soa.Self(), klass, true, true);
	my_klass_ = klass.Get();

	dex_ = my_klass_->GetDexCache()->GetDexFile();

	uint32_t code_size = 12;
	for (size_t i = 0 ; i < code_size; i++) {
	fake_code_.push_back(0x70 \| i);
	}

	fake_mapping_data_.PushBackUnsigned(4); // first element is count
	fake_mapping_data_.PushBackUnsigned(4); // total (non-length) elements
	fake_mapping_data_.PushBackUnsigned(2); // count of pc to dex elements
	// --- pc to dex table
	fake_mapping_data_.PushBackUnsigned(3 - 0); // offset 3
	fake_mapping_data_.PushBackSigned(3 - 0); // maps to dex offset 3
	// --- dex to pc table
	fake_mapping_data_.PushBackUnsigned(3 - 0); // offset 3
	fake_mapping_data_.PushBackSigned(3 - 0); // maps to dex offset 3

	fake_vmap_table_data_.PushBackUnsigned(0 + VmapTable::kEntryAdjustment);

	fake_gc_map_.push_back(0); // 0 bytes to encode references and native pc offsets.
	fake_gc_map_.push_back(0);
	fake_gc_map_.push_back(0); // 0 entries.
	fake_gc_map_.push_back(0);

	const std::vector<uint8_t>& fake_vmap_table_data = fake_vmap_table_data_.GetData();
	const std::vector<uint8_t>& fake_mapping_data = fake_mapping_data_.GetData();
	uint32_t vmap_table_offset = sizeof(OatQuickMethodHeader) + fake_vmap_table_data.size();
	uint32_t mapping_table_offset = vmap_table_offset + fake_mapping_data.size();
	uint32_t gc_map_offset = mapping_table_offset + fake_gc_map_.size();
	OatQuickMethodHeader method_header(mapping_table_offset, vmap_table_offset, gc_map_offset,
	4 * sizeof(void*), 0u, 0u, code_size);
	fake_header_code_and_maps_.resize(sizeof(method_header));
	memcpy(&fake_header_code_and_maps_[0], &method_header, sizeof(method_header));
	fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(),
	fake_vmap_table_data.begin(), fake_vmap_table_data.end());
	fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(),
	fake_mapping_data.begin(), fake_mapping_data.end());
	fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(),
	fake_gc_map_.begin(), fake_gc_map_.end());
	fake_header_code_and_maps_.insert(fake_header_code_and_maps_.end(),
	fake_code_.begin(), fake_code_.end());

	// Align the code.
	const size_t alignment = GetInstructionSetAlignment(kRuntimeISA);
	fake_header_code_and_maps_.reserve(fake_header_code_and_maps_.size() + alignment);
	const void* unaligned_code_ptr =
	fake_header_code_and_maps_.data() + (fake_header_code_and_maps_.size() - code_size);
	size_t offset = dchecked_integral_cast<size_t>(reinterpret_cast<uintptr_t>(unaligned_code_ptr));
	size_t padding = RoundUp(offset, alignment) - offset;
	// Make sure no resizing takes place.
	CHECK_GE(fake_header_code_and_maps_.capacity(), fake_header_code_and_maps_.size() + padding);
	fake_header_code_and_maps_.insert(fake_header_code_and_maps_.begin(), padding, 0);
	const void* code_ptr = reinterpret_cast<const uint8_t*>(unaligned_code_ptr) + padding;
	CHECK_EQ(code_ptr,
	static_cast<const void*>(fake_header_code_and_maps_.data() +
	(fake_header_code_and_maps_.size() - code_size)));

	if (kRuntimeISA == kArm) {
	// Check that the Thumb2 adjustment will be a NOP, see EntryPointToCodePointer().
	CHECK_ALIGNED(mapping_table_offset, 2);
	}

	method_f_ = my_klass_->FindVirtualMethod("f", "()I", sizeof(void*));
	ASSERT_TRUE(method_f_ != nullptr);
	method_f_->SetEntryPointFromQuickCompiledCode(code_ptr);

	method_g_ = my_klass_->FindVirtualMethod("g", "(I)V", sizeof(void*));
	ASSERT_TRUE(method_g_ != nullptr);
	method_g_->SetEntryPointFromQuickCompiledCode(code_ptr);
	}

	const DexFile* dex_;

	std::vector<uint8_t> fake_code_;
	Leb128EncodingVector<> fake_mapping_data_;
	Leb128EncodingVector<> fake_vmap_table_data_;
	std::vector<uint8_t> fake_gc_map_;
	std::vector<uint8_t> fake_header_code_and_maps_;

	ArtMethod* method_f_;
	ArtMethod* method_g_;

	private:
	mirror::Class* my_klass_;
	};

	TEST_F(ExceptionTest, FindCatchHandler) {
	ScopedObjectAccess soa(Thread::Current());
	const DexFile::CodeItem* code_item = dex_->GetCodeItem(method_f_->GetCodeItemOffset());

	ASSERT_TRUE(code_item != nullptr);

	ASSERT_EQ(2u, code_item->tries_size_);
	ASSERT_NE(0u, code_item->insns_size_in_code_units_);

	const DexFile::TryItem t0, t1;
	t0 = dex_->GetTryItems(*code_item, 0);
	t1 = dex_->GetTryItems(*code_item, 1);
	EXPECT_LE(t0->start_addr_, t1->start_addr_);
	{
	CatchHandlerIterator iter(code_item, 4 / Dex PC in the first try block */);
	EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
	ASSERT_TRUE(iter.HasNext());
	iter.Next();
	EXPECT_STREQ("Ljava/lang/Exception;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
	ASSERT_TRUE(iter.HasNext());
	iter.Next();
	EXPECT_FALSE(iter.HasNext());
	}
	{
	CatchHandlerIterator iter(code_item, 8 / Dex PC in the second try block */);
	EXPECT_STREQ("Ljava/io/IOException;", dex_->StringByTypeIdx(iter.GetHandlerTypeIndex()));
	ASSERT_TRUE(iter.HasNext());
	iter.Next();
	EXPECT_FALSE(iter.HasNext());
	}
	{
	CatchHandlerIterator iter(code_item, 11 / Dex PC not in any try block */);
	EXPECT_FALSE(iter.HasNext());
	}
	}

	TEST_F(ExceptionTest, StackTraceElement) {
	Thread* thread = Thread::Current();
	thread->TransitionFromSuspendedToRunnable();
	bool started = runtime_->Start();
	CHECK(started);
	JNIEnv* env = thread->GetJniEnv();
	ScopedObjectAccess soa(env);

	std::vector<uintptr_t> fake_stack;
	Runtime* r = Runtime::Current();
	r->SetInstructionSet(kRuntimeISA);
	ArtMethod* save_method = r->CreateCalleeSaveMethod();
	r->SetCalleeSaveMethod(save_method, Runtime::kSaveAll);
	QuickMethodFrameInfo frame_info = r->GetRuntimeMethodFrameInfo(save_method);

	ASSERT_EQ(kStackAlignment, 16U);
	// ASSERT_EQ(sizeof(uintptr_t), sizeof(uint32_t));


	// Create three fake stack frames with mapping data created in SetUp. We map offset 3 in the
	// code to dex pc 3.
	const uint32_t dex_pc = 3;

	// Create the stack frame for the callee save method, expected by the runtime.
	fake_stack.push_back(reinterpret_cast<uintptr_t>(save_method));
	for (size_t i = 0; i < frame_info.FrameSizeInBytes() - 2 * sizeof(uintptr_t);
	i += sizeof(uintptr_t)) {
	fake_stack.push_back(0);
	}

	fake_stack.push_back(method_g_->GetOatQuickMethodHeader(0)->ToNativeQuickPc(
	method_g_, dex_pc, /* is_catch_handler */ false)); // return pc

	// Create/push fake 16byte stack frame for method g
	fake_stack.push_back(reinterpret_cast<uintptr_t>(method_g_));
	fake_stack.push_back(0);
	fake_stack.push_back(0);
	fake_stack.push_back(method_g_->GetOatQuickMethodHeader(0)->ToNativeQuickPc(
	method_g_, dex_pc, /* is_catch_handler */ false)); // return pc

	// Create/push fake 16byte stack frame for method f
	fake_stack.push_back(reinterpret_cast<uintptr_t>(method_f_));
	fake_stack.push_back(0);
	fake_stack.push_back(0);
	fake_stack.push_back(0xEBAD6070); // return pc

	// Push Method* of null to terminate the trace
	fake_stack.push_back(0);

	// Push null values which will become null incoming arguments.
	fake_stack.push_back(0);
	fake_stack.push_back(0);
	fake_stack.push_back(0);

	// Set up thread to appear as if we called out of method_g_ at pc dex 3
	thread->SetTopOfStack(reinterpret_cast<ArtMethod**>(&fake_stack[0]));

	jobject internal = thread->CreateInternalStackTrace<false>(soa);
	ASSERT_TRUE(internal != nullptr);
	jobjectArray ste_array = Thread::InternalStackTraceToStackTraceElementArray(soa, internal);
	ASSERT_TRUE(ste_array != nullptr);
	auto* trace_array = soa.Decode<mirror::ObjectArray<mirror::StackTraceElement>*>(ste_array);

	ASSERT_TRUE(trace_array != nullptr);
	ASSERT_TRUE(trace_array->Get(0) != nullptr);
	EXPECT_STREQ("ExceptionHandle",
	trace_array->Get(0)->GetDeclaringClass()->ToModifiedUtf8().c_str());
	EXPECT_STREQ("ExceptionHandle.java",
	trace_array->Get(0)->GetFileName()->ToModifiedUtf8().c_str());
	EXPECT_STREQ("g", trace_array->Get(0)->GetMethodName()->ToModifiedUtf8().c_str());
	EXPECT_EQ(37, trace_array->Get(0)->GetLineNumber());

	ASSERT_TRUE(trace_array->Get(1) != nullptr);
	EXPECT_STREQ("ExceptionHandle",
	trace_array->Get(1)->GetDeclaringClass()->ToModifiedUtf8().c_str());
	EXPECT_STREQ("ExceptionHandle.java",
	trace_array->Get(1)->GetFileName()->ToModifiedUtf8().c_str());
	EXPECT_STREQ("f", trace_array->Get(1)->GetMethodName()->ToModifiedUtf8().c_str());
	EXPECT_EQ(22, trace_array->Get(1)->GetLineNumber());

	thread->SetTopOfStack(nullptr); // Disarm the assertion that no code is running when we detach.
	}

	} // namespace art