libunwindstack/tests/DexFileTest.cpp - android_system_core - 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 <malloc.h>
 #include <stdint.h>
 #include <sys/types.h>
 #include <unistd.h>

 #include <unordered_map>

 #include <MemoryLocal.h>
 #include <android-base/file.h>
 #include <gtest/gtest.h>
 #include <unwindstack/MapInfo.h>
 #include <unwindstack/Memory.h>

 #include "DexFile.h"
 #include "DexFileData.h"
 #include "MemoryFake.h"

 namespace unwindstack {

 TEST(DexFileTest, from_file_open_non_exist) {
   EXPECT_TRUE(DexFileFromFile::Create(0, "/file/does/not/exist") == nullptr);
 }

 TEST(DexFileTest, from_file_open_too_small) {
   TemporaryFile tf;
   ASSERT_TRUE(tf.fd != -1);

   ASSERT_EQ(size_t{10}, static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, 10))));

   // Header too small.
   EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) == nullptr);

   // Header correct, file too small.
   ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET));
   ASSERT_EQ(sizeof(kDexData) - 1,
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData) - 1))));
   EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) == nullptr);
 }

 TEST(DexFileTest, from_file_open) {
   TemporaryFile tf;
   ASSERT_TRUE(tf.fd != -1);

   ASSERT_EQ(sizeof(kDexData),
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

   EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) != nullptr);
 }

 TEST(DexFileTest, from_file_open_non_zero_offset) {
   TemporaryFile tf;
   ASSERT_TRUE(tf.fd != -1);

   ASSERT_EQ(0x100, lseek(tf.fd, 0x100, SEEK_SET));
   ASSERT_EQ(sizeof(kDexData),
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

   EXPECT_TRUE(DexFileFromFile::Create(0x100, tf.path) != nullptr);
 }

 static constexpr size_t kNumLeakLoops = 5000;
 static constexpr size_t kMaxAllowedLeakBytes = 1024;

 static void CheckForLeak(size_t loop, size_t* first_allocated_bytes, size_t* last_allocated_bytes) {
   size_t allocated_bytes = mallinfo().uordblks;
   if (*first_allocated_bytes == 0) {
     *first_allocated_bytes = allocated_bytes;
   } else if (*last_allocated_bytes > *first_allocated_bytes) {
     // Check that the total memory did not increase too much over the first loop.
     ASSERT_LE(*last_allocated_bytes - *first_allocated_bytes, kMaxAllowedLeakBytes)
         << "Failed in loop " << loop << " first_allocated_bytes " << *first_allocated_bytes
         << " last_allocated_bytes " << *last_allocated_bytes;
   }
   *last_allocated_bytes = allocated_bytes;
 }

 TEST(DexFileTest, from_file_no_leak) {
   TemporaryFile tf;
   ASSERT_TRUE(tf.fd != -1);

   ASSERT_EQ(sizeof(kDexData),
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

   size_t first_allocated_bytes = 0;
   size_t last_allocated_bytes = 0;
   for (size_t i = 0; i < kNumLeakLoops; i++) {
     EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) != nullptr);
     ASSERT_NO_FATAL_FAILURE(CheckForLeak(i, &first_allocated_bytes, &last_allocated_bytes));
   }
 }

 TEST(DexFileTest, from_memory_fail_too_small_for_header) {
   MemoryFake memory;

   memory.SetMemory(0x1000, kDexData, 10);

   EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "", sizeof(kDexData)) == nullptr);
 }

 TEST(DexFileTest, from_memory_fail_too_small_for_data) {
   MemoryFake memory;

   memory.SetMemory(0x1000, kDexData, sizeof(kDexData) - 2);

   EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "", sizeof(kDexData)) == nullptr);
 }

 TEST(DexFileTest, from_memory_open) {
   MemoryFake memory;

   memory.SetMemory(0x1000, kDexData, sizeof(kDexData));

   EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "", sizeof(kDexData)) != nullptr);
 }

 TEST(DexFileTest, from_memory_no_leak) {
   MemoryFake memory;

   memory.SetMemory(0x1000, kDexData, sizeof(kDexData));

   size_t first_allocated_bytes = 0;
   size_t last_allocated_bytes = 0;
   for (size_t i = 0; i < kNumLeakLoops; i++) {
     EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "", sizeof(kDexData)) != nullptr);
     ASSERT_NO_FATAL_FAILURE(CheckForLeak(i, &first_allocated_bytes, &last_allocated_bytes));
   }
 }

 TEST(DexFileTest, create_using_file) {
   TemporaryFile tf;
   ASSERT_TRUE(tf.fd != -1);

   ASSERT_EQ(0x500, lseek(tf.fd, 0x500, SEEK_SET));
   ASSERT_EQ(sizeof(kDexData),
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

   MemoryFake memory;
   MapInfo info(nullptr, nullptr, 0, 0x10000, 0, 0x5, tf.path);
   EXPECT_TRUE(DexFile::Create(0x500, &memory, &info) != nullptr);
 }

 TEST(DexFileTest, create_using_file_non_zero_start) {
   TemporaryFile tf;
   ASSERT_TRUE(tf.fd != -1);

   ASSERT_EQ(0x500, lseek(tf.fd, 0x500, SEEK_SET));
   ASSERT_EQ(sizeof(kDexData),
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

   MemoryFake memory;
   MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0, 0x5, tf.path);
   EXPECT_TRUE(DexFile::Create(0x600, &memory, &info) != nullptr);
 }

 TEST(DexFileTest, create_using_file_non_zero_offset) {
   TemporaryFile tf;
   ASSERT_TRUE(tf.fd != -1);

   ASSERT_EQ(0x500, lseek(tf.fd, 0x500, SEEK_SET));
   ASSERT_EQ(sizeof(kDexData),
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

   MemoryFake memory;
   MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, tf.path);
   EXPECT_TRUE(DexFile::Create(0x400, &memory, &info) != nullptr);
 }

 TEST(DexFileTest, create_using_memory_empty_file) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
   MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
   EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
 }

 TEST(DexFileTest, create_using_memory_file_does_not_exist) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
   MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "/does/not/exist");
   EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
 }

 TEST(DexFileTest, create_using_memory_file_is_malformed) {
   TemporaryFile tf;
   ASSERT_TRUE(tf.fd != -1);

   ASSERT_EQ(sizeof(kDexData) - 10,
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData) - 10))));

   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
   MapInfo info(nullptr, nullptr, 0x4000, 0x10000, 0x200, 0x5, "/does/not/exist");
   std::unique_ptr<DexFile> dex_file = DexFile::Create(0x4000, &memory, &info);
   ASSERT_TRUE(dex_file != nullptr);

   // Check it came from memory by clearing memory and verifying it fails.
   memory.Clear();
   dex_file = DexFile::Create(0x4000, &memory, &info);
   EXPECT_TRUE(dex_file == nullptr);
 }

 TEST(DexFileTest, create_using_memory_size_too_small) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
   MapInfo info(nullptr, nullptr, 0x100, sizeof(kDexData) - 2, 0x200, 0x5, "/does/not/exist");
   EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
 }

 class MemoryLocalFake : public MemoryLocal {
  public:
   MemoryLocalFake(size_t memory_size) : backing_(memory_size) {}
   virtual ~MemoryLocalFake() = default;

   void* Data() { return backing_.data(); }

  private:
   std::vector<void*> backing_;
 };

 TEST(DexFileTest, create_using_local_memory) {
   MemoryLocalFake memory(sizeof(kDexData));

   memcpy(memory.Data(), kDexData, sizeof(kDexData));
   uint64_t start = reinterpret_cast<uint64_t>(memory.Data());
   MapInfo info(nullptr, nullptr, start, start + 0x1000, 0x200, 0x5, "/does/not/exist");
   EXPECT_TRUE(DexFile::Create(start, &memory, &info) != nullptr);
 }

 TEST(DexFileTest, create_using_local_memory_size_too_small) {
   MemoryLocalFake memory(sizeof(kDexData));

   memcpy(memory.Data(), kDexData, sizeof(kDexData));
   uint64_t start = reinterpret_cast<uint64_t>(memory.Data());
   MapInfo info(nullptr, nullptr, start, start + sizeof(kDexData) - 2, 0x200, 0x5,
                "/does/not/exist");
   EXPECT_TRUE(DexFile::Create(start, &memory, &info) == nullptr);
 }

 TEST(DexFileTest, get_method) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
   MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
   std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
   ASSERT_TRUE(dex_file != nullptr);

   std::string method;
   uint64_t method_offset;
   ASSERT_TRUE(dex_file->GetMethodInformation(0x102, &method, &method_offset));
   EXPECT_EQ("Main.<init>", method);
   EXPECT_EQ(2U, method_offset);

   ASSERT_TRUE(dex_file->GetMethodInformation(0x118, &method, &method_offset));
   EXPECT_EQ("Main.main", method);
   EXPECT_EQ(0U, method_offset);
 }

 TEST(DexFileTest, get_method_empty) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
   MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
   std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
   ASSERT_TRUE(dex_file != nullptr);

   std::string method;
   uint64_t method_offset;
   EXPECT_FALSE(dex_file->GetMethodInformation(0x100000, &method, &method_offset));

   EXPECT_FALSE(dex_file->GetMethodInformation(0x98, &method, &method_offset));
 }

 }  // namespace unwindstack
	/*
	* 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 <malloc.h>
	#include <stdint.h>
	#include <sys/types.h>
	#include <unistd.h>

	#include <unordered_map>

	#include <MemoryLocal.h>
	#include <android-base/file.h>
	#include <gtest/gtest.h>
	#include <unwindstack/MapInfo.h>
	#include <unwindstack/Memory.h>

	#include "DexFile.h"
	#include "DexFileData.h"
	#include "MemoryFake.h"

	namespace unwindstack {

	TEST(DexFileTest, from_file_open_non_exist) {
	EXPECT_TRUE(DexFileFromFile::Create(0, "/file/does/not/exist") == nullptr);
	}

	TEST(DexFileTest, from_file_open_too_small) {
	TemporaryFile tf;
	ASSERT_TRUE(tf.fd != -1);

	ASSERT_EQ(size_t{10}, static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, 10))));

	// Header too small.
	EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) == nullptr);

	// Header correct, file too small.
	ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET));
	ASSERT_EQ(sizeof(kDexData) - 1,
	static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData) - 1))));
	EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) == nullptr);
	}

	TEST(DexFileTest, from_file_open) {
	TemporaryFile tf;
	ASSERT_TRUE(tf.fd != -1);

	ASSERT_EQ(sizeof(kDexData),
	static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

	EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) != nullptr);
	}

	TEST(DexFileTest, from_file_open_non_zero_offset) {
	TemporaryFile tf;
	ASSERT_TRUE(tf.fd != -1);

	ASSERT_EQ(0x100, lseek(tf.fd, 0x100, SEEK_SET));
	ASSERT_EQ(sizeof(kDexData),
	static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

	EXPECT_TRUE(DexFileFromFile::Create(0x100, tf.path) != nullptr);
	}

	static constexpr size_t kNumLeakLoops = 5000;
	static constexpr size_t kMaxAllowedLeakBytes = 1024;

	static void CheckForLeak(size_t loop, size_t* first_allocated_bytes, size_t* last_allocated_bytes) {
	size_t allocated_bytes = mallinfo().uordblks;
	if (*first_allocated_bytes == 0) {
	*first_allocated_bytes = allocated_bytes;
	} else if (last_allocated_bytes > first_allocated_bytes) {
	// Check that the total memory did not increase too much over the first loop.
	ASSERT_LE(last_allocated_bytes - first_allocated_bytes, kMaxAllowedLeakBytes)
	<< "Failed in loop " << loop << " first_allocated_bytes " << *first_allocated_bytes
	<< " last_allocated_bytes " << *last_allocated_bytes;
	}
	*last_allocated_bytes = allocated_bytes;
	}

	TEST(DexFileTest, from_file_no_leak) {
	TemporaryFile tf;
	ASSERT_TRUE(tf.fd != -1);

	ASSERT_EQ(sizeof(kDexData),
	static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

	size_t first_allocated_bytes = 0;
	size_t last_allocated_bytes = 0;
	for (size_t i = 0; i < kNumLeakLoops; i++) {
	EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) != nullptr);
	ASSERT_NO_FATAL_FAILURE(CheckForLeak(i, &first_allocated_bytes, &last_allocated_bytes));
	}
	}

	TEST(DexFileTest, from_memory_fail_too_small_for_header) {
	MemoryFake memory;

	memory.SetMemory(0x1000, kDexData, 10);

	EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "", sizeof(kDexData)) == nullptr);
	}

	TEST(DexFileTest, from_memory_fail_too_small_for_data) {
	MemoryFake memory;

	memory.SetMemory(0x1000, kDexData, sizeof(kDexData) - 2);

	EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "", sizeof(kDexData)) == nullptr);
	}

	TEST(DexFileTest, from_memory_open) {
	MemoryFake memory;

	memory.SetMemory(0x1000, kDexData, sizeof(kDexData));

	EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "", sizeof(kDexData)) != nullptr);
	}

	TEST(DexFileTest, from_memory_no_leak) {
	MemoryFake memory;

	memory.SetMemory(0x1000, kDexData, sizeof(kDexData));

	size_t first_allocated_bytes = 0;
	size_t last_allocated_bytes = 0;
	for (size_t i = 0; i < kNumLeakLoops; i++) {
	EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "", sizeof(kDexData)) != nullptr);
	ASSERT_NO_FATAL_FAILURE(CheckForLeak(i, &first_allocated_bytes, &last_allocated_bytes));
	}
	}

	TEST(DexFileTest, create_using_file) {
	TemporaryFile tf;
	ASSERT_TRUE(tf.fd != -1);

	ASSERT_EQ(0x500, lseek(tf.fd, 0x500, SEEK_SET));
	ASSERT_EQ(sizeof(kDexData),
	static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

	MemoryFake memory;
	MapInfo info(nullptr, nullptr, 0, 0x10000, 0, 0x5, tf.path);
	EXPECT_TRUE(DexFile::Create(0x500, &memory, &info) != nullptr);
	}

	TEST(DexFileTest, create_using_file_non_zero_start) {
	TemporaryFile tf;
	ASSERT_TRUE(tf.fd != -1);

	ASSERT_EQ(0x500, lseek(tf.fd, 0x500, SEEK_SET));
	ASSERT_EQ(sizeof(kDexData),
	static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

	MemoryFake memory;
	MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0, 0x5, tf.path);
	EXPECT_TRUE(DexFile::Create(0x600, &memory, &info) != nullptr);
	}

	TEST(DexFileTest, create_using_file_non_zero_offset) {
	TemporaryFile tf;
	ASSERT_TRUE(tf.fd != -1);

	ASSERT_EQ(0x500, lseek(tf.fd, 0x500, SEEK_SET));
	ASSERT_EQ(sizeof(kDexData),
	static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));

	MemoryFake memory;
	MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, tf.path);
	EXPECT_TRUE(DexFile::Create(0x400, &memory, &info) != nullptr);
	}

	TEST(DexFileTest, create_using_memory_empty_file) {
	MemoryFake memory;
	memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
	MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
	EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
	}

	TEST(DexFileTest, create_using_memory_file_does_not_exist) {
	MemoryFake memory;
	memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
	MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "/does/not/exist");
	EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
	}

	TEST(DexFileTest, create_using_memory_file_is_malformed) {
	TemporaryFile tf;
	ASSERT_TRUE(tf.fd != -1);

	ASSERT_EQ(sizeof(kDexData) - 10,
	static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData) - 10))));

	MemoryFake memory;
	memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
	MapInfo info(nullptr, nullptr, 0x4000, 0x10000, 0x200, 0x5, "/does/not/exist");
	std::unique_ptr<DexFile> dex_file = DexFile::Create(0x4000, &memory, &info);
	ASSERT_TRUE(dex_file != nullptr);

	// Check it came from memory by clearing memory and verifying it fails.
	memory.Clear();
	dex_file = DexFile::Create(0x4000, &memory, &info);
	EXPECT_TRUE(dex_file == nullptr);
	}

	TEST(DexFileTest, create_using_memory_size_too_small) {
	MemoryFake memory;
	memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
	MapInfo info(nullptr, nullptr, 0x100, sizeof(kDexData) - 2, 0x200, 0x5, "/does/not/exist");
	EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
	}

	class MemoryLocalFake : public MemoryLocal {
	public:
	MemoryLocalFake(size_t memory_size) : backing_(memory_size) {}
	virtual ~MemoryLocalFake() = default;

	void* Data() { return backing_.data(); }

	private:
	std::vector<void*> backing_;
	};

	TEST(DexFileTest, create_using_local_memory) {
	MemoryLocalFake memory(sizeof(kDexData));

	memcpy(memory.Data(), kDexData, sizeof(kDexData));
	uint64_t start = reinterpret_cast<uint64_t>(memory.Data());
	MapInfo info(nullptr, nullptr, start, start + 0x1000, 0x200, 0x5, "/does/not/exist");
	EXPECT_TRUE(DexFile::Create(start, &memory, &info) != nullptr);
	}

	TEST(DexFileTest, create_using_local_memory_size_too_small) {
	MemoryLocalFake memory(sizeof(kDexData));

	memcpy(memory.Data(), kDexData, sizeof(kDexData));
	uint64_t start = reinterpret_cast<uint64_t>(memory.Data());
	MapInfo info(nullptr, nullptr, start, start + sizeof(kDexData) - 2, 0x200, 0x5,
	"/does/not/exist");
	EXPECT_TRUE(DexFile::Create(start, &memory, &info) == nullptr);
	}

	TEST(DexFileTest, get_method) {
	MemoryFake memory;
	memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
	MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
	std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
	ASSERT_TRUE(dex_file != nullptr);

	std::string method;
	uint64_t method_offset;
	ASSERT_TRUE(dex_file->GetMethodInformation(0x102, &method, &method_offset));
	EXPECT_EQ("Main.<init>", method);
	EXPECT_EQ(2U, method_offset);

	ASSERT_TRUE(dex_file->GetMethodInformation(0x118, &method, &method_offset));
	EXPECT_EQ("Main.main", method);
	EXPECT_EQ(0U, method_offset);
	}

	TEST(DexFileTest, get_method_empty) {
	MemoryFake memory;
	memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
	MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
	std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
	ASSERT_TRUE(dex_file != nullptr);

	std::string method;
	uint64_t method_offset;
	EXPECT_FALSE(dex_file->GetMethodInformation(0x100000, &method, &method_offset));

	EXPECT_FALSE(dex_file->GetMethodInformation(0x98, &method, &method_offset));
	}

	} // namespace unwindstack