simpleperf/dso_test.cpp - platform/system/extras - Git at Google

 /*
  * 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 "dso.h"

 #include <gtest/gtest.h>

 #include <android-base/file.h>
 #include <android-base/stringprintf.h>
 #include <android-base/test_utils.h>

 #include "get_test_data.h"
 #include "read_apk.h"
 #include "thread_tree.h"
 #include "utils.h"

 using namespace simpleperf;
 using namespace simpleperf_dso_impl;

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, use_build_id_list) {
   // Create a temp symdir with build_id_list.
   TemporaryDir tmpdir;
   TemporaryFile tmpfile(tmpdir.path);
   std::string data;
   ASSERT_TRUE(android::base::ReadFileToString(GetTestData(ELF_FILE), &data));
   ASSERT_TRUE(android::base::WriteStringToFile(data, tmpfile.path));
   BuildId build_id(ELF_FILE_BUILD_ID);
   std::string build_id_list = android::base::StringPrintf(
       "%s=%s\n", build_id.ToString().c_str(), android::base::Basename(tmpfile.path).c_str());
   std::string build_id_list_file = std::string(tmpdir.path) + "/build_id_list";
   ASSERT_TRUE(android::base::WriteStringToFile(build_id_list, build_id_list_file));

   DebugElfFileFinder finder;
   ASSERT_TRUE(finder.SetSymFsDir(tmpdir.path));
   ASSERT_EQ(finder.FindDebugFile("elf", false, build_id), std::string(tmpfile.path));
   unlink(build_id_list_file.c_str());
 }

 static std::string ConvertPathSeparator(const std::string& path) {
   std::string result = path;
   if (OS_PATH_SEPARATOR != '/') {
     std::replace(result.begin(), result.end(), '/', OS_PATH_SEPARATOR);
   }
   return result;
 }

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, concatenating_symfs_dir) {
   DebugElfFileFinder finder;
   ASSERT_TRUE(finder.SetSymFsDir(GetTestDataDir()));
   ASSERT_EQ(finder.GetPathInSymFsDir("/system/libc.so"),
             GetTestDataDir() + "system" + OS_PATH_SEPARATOR + "libc.so");
   ASSERT_EQ(finder.GetPathInSymFsDir("/data/base.apk!/lib/base.so"),
             GetTestDataDir() + "data" + OS_PATH_SEPARATOR + "base.apk!/lib/base.so");

   BuildId build_id(ELF_FILE_BUILD_ID);
   ASSERT_EQ(finder.FindDebugFile(ELF_FILE, false, build_id), GetTestDataDir() + ELF_FILE);
   std::string native_lib_in_apk = APK_FILE + "!/" + NATIVELIB_IN_APK;
   std::string apk_path = ConvertPathSeparator(APK_FILE);
   ASSERT_EQ(finder.FindDebugFile(native_lib_in_apk, false, native_lib_build_id),
             GetTestDataDir() + apk_path + "!/" + NATIVELIB_IN_APK);
 }

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, use_vdso) {
   DebugElfFileFinder finder;
   std::string fake_vdso32 = "fake_vdso32";
   std::string fake_vdso64 = "fake_vdso64";
   finder.SetVdsoFile(fake_vdso32, false);
   finder.SetVdsoFile(fake_vdso64, true);
   BuildId build_id;
   ASSERT_EQ(finder.FindDebugFile("[vdso]", false, build_id), fake_vdso32);
   ASSERT_EQ(finder.FindDebugFile("[vdso]", true, build_id), fake_vdso64);
 }

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, add_symbol_dir) {
   DebugElfFileFinder finder;
   ASSERT_FALSE(finder.AddSymbolDir(GetTestDataDir() + "dir_not_exist"));
   ASSERT_EQ(finder.FindDebugFile("elf", false, CHECK_ELF_FILE_BUILD_ID), "elf");
   std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + CORRECT_SYMFS_FOR_BUILD_ID_CHECK);
   ASSERT_TRUE(finder.AddSymbolDir(symfs_dir));
   ASSERT_EQ(finder.FindDebugFile("elf", false, CHECK_ELF_FILE_BUILD_ID),
             symfs_dir + OS_PATH_SEPARATOR + "elf_for_build_id_check");
 }

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, allow_mismatched_build_id) {
   DebugElfFileFinder finder;
   std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + CORRECT_SYMFS_FOR_BUILD_ID_CHECK);
   ASSERT_TRUE(finder.AddSymbolDir(symfs_dir));
   // By default, can't find binary with empty or different build ids.
   BuildId empty_build_id;
   ASSERT_EQ(finder.FindDebugFile("/data/elf_for_build_id_check", false, empty_build_id),
             "/data/elf_for_build_id_check");
   BuildId different_build_id("01234");
   ASSERT_EQ(finder.FindDebugFile("/data/elf_for_build_id_check", false, different_build_id),
             "/data/elf_for_build_id_check");

   // With AllowMismatchedBuildId(), can find binary with empty and different build ids.
   finder.AllowMismatchedBuildId();
   empty_build_id = BuildId();
   ASSERT_EQ(finder.FindDebugFile("/data/elf_for_build_id_check", false, empty_build_id),
             symfs_dir + OS_PATH_SEPARATOR + "elf_for_build_id_check");
   different_build_id = BuildId("01234");
   ASSERT_EQ(finder.FindDebugFile("/data/elf_for_build_id_check", false, different_build_id),
             symfs_dir + OS_PATH_SEPARATOR + "elf_for_build_id_check");
 }

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, build_id_list) {
   DebugElfFileFinder finder;
   // Find file in symfs dir with correct build_id_list.
   std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + "data/symfs_with_build_id_list");
   ASSERT_TRUE(finder.SetSymFsDir(symfs_dir));
   ASSERT_EQ(finder.FindDebugFile("elf", false, CHECK_ELF_FILE_BUILD_ID),
             symfs_dir + OS_PATH_SEPARATOR + "elf_for_build_id_check");

   // Find file in symfs_dir with wrong build_id_list.
   symfs_dir = ConvertPathSeparator(GetTestDataDir() + "data/symfs_with_wrong_build_id_list");
   finder.Reset();
   ASSERT_TRUE(finder.SetSymFsDir(symfs_dir));
   ASSERT_EQ(finder.FindDebugFile("elf", false, CHECK_ELF_FILE_BUILD_ID), "elf");
 }

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, no_build_id) {
   DebugElfFileFinder finder;
   // If not given a build id, we should match an elf in symfs without build id.
   std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + "data/symfs_without_build_id");
   ASSERT_TRUE(finder.SetSymFsDir(symfs_dir));
   BuildId build_id;
   ASSERT_EQ(finder.FindDebugFile("elf", false, build_id), symfs_dir + OS_PATH_SEPARATOR + "elf");
 }

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, find_basename_in_symfs_dir) {
   DebugElfFileFinder finder;
   // Find normal elf file.
   finder.SetSymFsDir(GetTestDataDir());
   BuildId build_id(ELF_FILE_BUILD_ID);
   ASSERT_EQ(finder.FindDebugFile("random_dir/elf", false, build_id), GetTestData("elf"));

   // Find embedded native library.
   ASSERT_EQ(finder.FindDebugFile("base.apk!/lib/x86_64/elf", false, build_id), GetTestData("elf"));

   // Find elf file without build id.
   std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + "data/symfs_without_build_id");
   finder.SetSymFsDir(symfs_dir);
   build_id = BuildId();
   ASSERT_EQ(finder.FindDebugFile("random_dir/elf", false, build_id),
             symfs_dir + OS_PATH_SEPARATOR + "elf");
 }

 // @CddTest = 6.1/C-0-2
 TEST(DebugElfFileFinder, build_id_mismatch) {
   DebugElfFileFinder finder;
   finder.SetSymFsDir(GetTestDataDir());
   CapturedStderr capture;
   BuildId mismatch_build_id("0c12a384a9f4a3f3659b7171ca615dbec3a81f71");
   std::string debug_file = finder.FindDebugFile(ELF_FILE, false, mismatch_build_id);
   capture.Stop();
   std::string stderr_output = capture.str();
   ASSERT_EQ(debug_file, ELF_FILE);
   ASSERT_NE(stderr_output.find("build id mismatch"), std::string::npos);
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, dex_file_dso) {
 #if defined(__linux__)
   for (DsoType dso_type : {DSO_DEX_FILE, DSO_ELF_FILE}) {
     std::unique_ptr<Dso> dso = Dso::CreateDso(dso_type, GetTestData("base.vdex"));
     ASSERT_TRUE(dso);
     dso->AddDexFileOffset(0x28);
     ASSERT_EQ(DSO_DEX_FILE, dso->type());
     const Symbol* symbol = dso->FindSymbol(0x6c77e);
     ASSERT_NE(symbol, nullptr);
     ASSERT_EQ(symbol->addr, static_cast<uint64_t>(0x6c77e));
     ASSERT_EQ(symbol->len, static_cast<uint64_t>(0x16));
     ASSERT_STREQ(symbol->DemangledName(),
                  "com.example.simpleperf.simpleperfexamplewithnative.MixActivity$1.run");
     uint64_t min_vaddr;
     uint64_t file_offset_of_min_vaddr;
     dso->GetMinExecutableVaddr(&min_vaddr, &file_offset_of_min_vaddr);
     ASSERT_EQ(min_vaddr, 0);
     ASSERT_EQ(file_offset_of_min_vaddr, 0);

     // Don't crash on not exist zip entry.
     dso = Dso::CreateDso(dso_type, GetTestData("base.zip!/not_exist_entry"));
     ASSERT_TRUE(dso);
     ASSERT_EQ(nullptr, dso->FindSymbol(0));
   }
 #else
   GTEST_LOG_(INFO) << "This test only runs on linux because of libdexfile";
 #endif  // defined(__linux__)
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, dex_file_offsets) {
   std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_DEX_FILE, "");
   ASSERT_TRUE(dso);
   for (uint64_t offset : {0x3, 0x1, 0x5, 0x4, 0x2, 0x4, 0x3}) {
     dso->AddDexFileOffset(offset);
   }
   ASSERT_EQ(*dso->DexFileOffsets(), std::vector<uint64_t>({0x1, 0x2, 0x3, 0x4, 0x5}));
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, embedded_elf) {
   const std::string file_path = GetUrlInApk(GetTestData(APK_FILE), NATIVELIB_IN_APK);
   std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_ELF_FILE, file_path);
   ASSERT_TRUE(dso);
   ASSERT_EQ(dso->Path(), file_path);
   ASSERT_EQ(dso->GetDebugFilePath(), file_path);
   uint64_t min_vaddr;
   uint64_t file_offset_of_min_vaddr;
   dso->GetMinExecutableVaddr(&min_vaddr, &file_offset_of_min_vaddr);
   ASSERT_EQ(min_vaddr, 0);
   ASSERT_EQ(file_offset_of_min_vaddr, 0);
   const Symbol* symbol = dso->FindSymbol(0x9a4);
   ASSERT_TRUE(symbol != nullptr);
   ASSERT_STREQ(symbol->Name(), "Java_com_example_hellojni_HelloJni_callFunc1");
   BuildId build_id;
   ASSERT_TRUE(GetBuildIdFromDsoPath(file_path, &build_id));
   ASSERT_EQ(build_id, native_lib_build_id);
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, IpToVaddrInFile) {
   std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_ELF_FILE, GetTestData("libc.so"));
   ASSERT_TRUE(dso);
   ASSERT_EQ(0xa5140, dso->IpToVaddrInFile(0xe9201140, 0xe9201000, 0xa5000));
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, kernel_address_randomization) {
   // Use ELF_FILE as a fake kernel vmlinux.
   const std::string vmlinux_path = GetTestData(ELF_FILE);
   Dso::SetVmlinux(vmlinux_path);
   std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
   ASSERT_TRUE(dso);
   ASSERT_EQ(dso->GetDebugFilePath(), vmlinux_path);
   // When map_start = 0, can't fix kernel address randomization. So vmlinux isn't used.
   ASSERT_EQ(dso->IpToVaddrInFile(0x800500, 0, 0), 0x800500);
   ASSERT_FALSE(dso->IpToFileOffset(0x800500, 0, 0));
   ASSERT_TRUE(dso->FindSymbol(0x400510) == nullptr);

   dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
   ASSERT_TRUE(dso);
   ASSERT_EQ(dso->GetDebugFilePath(), vmlinux_path);
   // When map_start != 0, can fix kernel address randomization. So vmlinux is used.
   ASSERT_EQ(dso->IpToVaddrInFile(0x800500, 0x800400, 0), 0x400500);
   ASSERT_EQ(dso->IpToFileOffset(0x800500, 0x800400, 0).value(), 0x500);
   const Symbol* symbol = dso->FindSymbol(0x400510);
   ASSERT_TRUE(symbol != nullptr);
   ASSERT_STREQ(symbol->Name(), "GlobalFunc");
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, find_vmlinux_in_symdirs) {
   // Create a symdir.
   TemporaryDir tmpdir;
   std::string vmlinux_path = std::string(tmpdir.path) + OS_PATH_SEPARATOR + "elf";
   std::string data;
   ASSERT_TRUE(android::base::ReadFileToString(GetTestData(ELF_FILE), &data));
   ASSERT_TRUE(android::base::WriteStringToFile(data, vmlinux_path));

   // Find vmlinux in symbol dirs.
   Dso::SetVmlinux("");
   Dso::AddSymbolDir(tmpdir.path);
   Dso::SetBuildIds({std::make_pair(DEFAULT_KERNEL_MMAP_NAME, BuildId(ELF_FILE_BUILD_ID))});
   std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
   ASSERT_TRUE(dso);
   ASSERT_EQ(dso->GetDebugFilePath(), vmlinux_path);
   ASSERT_EQ(0x400927, dso->IpToVaddrInFile(0x800527, 0x800000, 0));

   // Find vmlinux by CreateDsoWithBuildId.
   Dso::SetBuildIds({});
   BuildId build_id(ELF_FILE_BUILD_ID);
   dso = Dso::CreateDsoWithBuildId(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME, build_id);
   ASSERT_TRUE(dso);
   ASSERT_EQ(dso->GetDebugFilePath(), vmlinux_path);
   ASSERT_EQ(0x400927, dso->IpToVaddrInFile(0x800527, 0x800000, 0));
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, kernel_module) {
   // Test finding debug files for kernel modules.
   Dso::SetSymFsDir(GetTestDataDir());
   std::vector<std::pair<std::string, BuildId>> build_ids;
   build_ids.emplace_back(ELF_FILE, BuildId(ELF_FILE_BUILD_ID));
   Dso::SetBuildIds(build_ids);
   std::unique_ptr<Dso> kernel_dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
   ASSERT_TRUE(kernel_dso);
   std::unique_ptr<Dso> dso = Dso::CreateKernelModuleDso(ELF_FILE, 0, 0, kernel_dso.get());
   ASSERT_EQ(dso->GetDebugFilePath(), GetTestData(ELF_FILE));
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, kernel_module_CalculateMinVaddr) {
   // Create fake Dso objects.
   auto kernel_dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
   ASSERT_TRUE(kernel_dso);
   const uint64_t module_memory_start = 0xffffffa9bc790000ULL;
   const uint64_t module_memory_size = 0x8d7000ULL;
   TemporaryFile tmpfile;
   auto module_dso =
       Dso::CreateKernelModuleDso(tmpfile.path, module_memory_start,
                                  module_memory_start + module_memory_size, kernel_dso.get());
   ASSERT_TRUE(module_dso);

   // Provide symbol info for calculating min vaddr.
   std::vector<Symbol> kernel_symbols;
   kernel_symbols.emplace_back("fake_module_function [fake_module]", 0xffffffa9bc7a64e8ULL, 0x60c);
   kernel_dso->SetSymbols(&kernel_symbols);
   std::vector<Symbol> module_symbols;
   module_symbols.emplace_back("fake_module_function", 0x144e8, 0x60c);
   module_dso->SetSymbols(&module_symbols);

   // Calculate min vaddr.
   uint64_t min_vaddr;
   uint64_t memory_offset;
   module_dso->GetMinExecutableVaddr(&min_vaddr, &memory_offset);
   ASSERT_EQ(min_vaddr, 0x144e8);
   ASSERT_EQ(memory_offset, 0x164e8);

   // Use min vaddr in IpToVaddrInFile().
   ASSERT_EQ(module_dso->IpToVaddrInFile(0xffffffa9bc7a64e8ULL, module_memory_start, 0), 0x144e8);
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, symbol_map_file) {
   auto dso = Dso::CreateDso(DSO_SYMBOL_MAP_FILE, "perf-123.map");
   ASSERT_TRUE(dso);
   ASSERT_EQ(DSO_SYMBOL_MAP_FILE, dso->type());
   ASSERT_EQ(0x12345678, dso->IpToVaddrInFile(0x12345678, 0x0, 0x0));
   ASSERT_EQ(0x12345678, dso->IpToVaddrInFile(0x12345678, 0xe9201000, 0xa5000));
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, FunctionName) {
   Symbol symbol = Symbol("void ctep.v(cteo, ctgc, ctbn)", 0x0, 0x1);
   ASSERT_EQ(symbol.FunctionName(), "ctep.v");
   symbol = Symbol("ctep.v(cteo, ctgc, ctbn)", 0x0, 0x1);
   ASSERT_EQ(symbol.FunctionName(), "ctep.v");
   symbol = Symbol("ctep.v", 0x0, 0x1);
   ASSERT_EQ(symbol.FunctionName(), "ctep.v");
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, search_debug_file_only_when_needed) {
   Dso::SetBuildIds({std::make_pair("/elf", BuildId("1b12a384a9f4a3f3659b7171ca615dbec3a81f71"))});
   Dso::SetSymFsDir(GetTestDataDir());
   CapturedStderr capture;
   auto dso = Dso::CreateDso(DSO_ELF_FILE, "/elf");
   ASSERT_EQ(capture.str().find("build id mismatch"), std::string::npos);
   ASSERT_EQ(dso->GetDebugFilePath(), "/elf");
   ASSERT_NE(capture.str().find("build id mismatch"), std::string::npos);
   capture.Stop();
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, read_symbol_warning) {
   {
     // Don't warn when the file may not be an ELF file.
     auto dso = Dso::CreateDso(DSO_ELF_FILE, GetTestData("not_exist_file"));
     CapturedStderr capture;
     dso->LoadSymbols();
     ASSERT_EQ(capture.str().find("failed to read symbols"), std::string::npos);
   }
   {
     // Don't warn when the file may not be an ELF file.
     auto dso = Dso::CreateDso(DSO_ELF_FILE, GetTestData("base.vdex"));
     CapturedStderr capture;
     dso->LoadSymbols();
     ASSERT_EQ(capture.str().find("failed to read symbols"), std::string::npos);
   }
   {
     // Warn when the file is an ELF file (having a build id).
     std::string file_path = GetTestData("not_exist_file");
     Dso::SetBuildIds(
         {std::make_pair(file_path, BuildId("1b12a384a9f4a3f3659b7171ca615dbec3a81f71"))});
     auto dso = Dso::CreateDso(DSO_ELF_FILE, file_path);
     CapturedStderr capture;
     dso->LoadSymbols();
     ASSERT_NE(capture.str().find("failed to read symbols"), std::string::npos);
   }
   {
     // Don't warn when we already have symbols.
     std::string file_path = GetTestData("not_exist_file");
     Dso::SetBuildIds(
         {std::make_pair(file_path, BuildId("1b12a384a9f4a3f3659b7171ca615dbec3a81f71"))});
     auto dso = Dso::CreateDso(DSO_ELF_FILE, file_path);
     std::vector<Symbol> symbols;
     symbols.emplace_back("fake_symbol", 0x1234, 0x60);
     dso->SetSymbols(&symbols);
     CapturedStderr capture;
     dso->LoadSymbols();
     ASSERT_EQ(capture.str().find("failed to read symbols"), std::string::npos);
   }
 }

 // @CddTest = 6.1/C-0-2
 TEST(dso, demangle) {
   ASSERT_EQ(Dso::Demangle("main"), "main");
   ASSERT_EQ(Dso::Demangle("_ZN4main4main17h2a68d4d833d7495aE"), "main::main::h2a68d4d833d7495a");
 #if defined(__linux__) || defined(__darwin__)
   // Demangling rust symbol is only supported on linux and darwin.
   ASSERT_EQ(Dso::Demangle("_RNvC6_123foo3bar"), "123foo::bar");
 #endif
 }
	/*
	* 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 "dso.h"

	#include <gtest/gtest.h>

	#include <android-base/file.h>
	#include <android-base/stringprintf.h>
	#include <android-base/test_utils.h>

	#include "get_test_data.h"
	#include "read_apk.h"
	#include "thread_tree.h"
	#include "utils.h"

	using namespace simpleperf;
	using namespace simpleperf_dso_impl;

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, use_build_id_list) {
	// Create a temp symdir with build_id_list.
	TemporaryDir tmpdir;
	TemporaryFile tmpfile(tmpdir.path);
	std::string data;
	ASSERT_TRUE(android::base::ReadFileToString(GetTestData(ELF_FILE), &data));
	ASSERT_TRUE(android::base::WriteStringToFile(data, tmpfile.path));
	BuildId build_id(ELF_FILE_BUILD_ID);
	std::string build_id_list = android::base::StringPrintf(
	"%s=%s\n", build_id.ToString().c_str(), android::base::Basename(tmpfile.path).c_str());
	std::string build_id_list_file = std::string(tmpdir.path) + "/build_id_list";
	ASSERT_TRUE(android::base::WriteStringToFile(build_id_list, build_id_list_file));

	DebugElfFileFinder finder;
	ASSERT_TRUE(finder.SetSymFsDir(tmpdir.path));
	ASSERT_EQ(finder.FindDebugFile("elf", false, build_id), std::string(tmpfile.path));
	unlink(build_id_list_file.c_str());
	}

	static std::string ConvertPathSeparator(const std::string& path) {
	std::string result = path;
	if (OS_PATH_SEPARATOR != '/') {
	std::replace(result.begin(), result.end(), '/', OS_PATH_SEPARATOR);
	}
	return result;
	}

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, concatenating_symfs_dir) {
	DebugElfFileFinder finder;
	ASSERT_TRUE(finder.SetSymFsDir(GetTestDataDir()));
	ASSERT_EQ(finder.GetPathInSymFsDir("/system/libc.so"),
	GetTestDataDir() + "system" + OS_PATH_SEPARATOR + "libc.so");
	ASSERT_EQ(finder.GetPathInSymFsDir("/data/base.apk!/lib/base.so"),
	GetTestDataDir() + "data" + OS_PATH_SEPARATOR + "base.apk!/lib/base.so");

	BuildId build_id(ELF_FILE_BUILD_ID);
	ASSERT_EQ(finder.FindDebugFile(ELF_FILE, false, build_id), GetTestDataDir() + ELF_FILE);
	std::string native_lib_in_apk = APK_FILE + "!/" + NATIVELIB_IN_APK;
	std::string apk_path = ConvertPathSeparator(APK_FILE);
	ASSERT_EQ(finder.FindDebugFile(native_lib_in_apk, false, native_lib_build_id),
	GetTestDataDir() + apk_path + "!/" + NATIVELIB_IN_APK);
	}

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, use_vdso) {
	DebugElfFileFinder finder;
	std::string fake_vdso32 = "fake_vdso32";
	std::string fake_vdso64 = "fake_vdso64";
	finder.SetVdsoFile(fake_vdso32, false);
	finder.SetVdsoFile(fake_vdso64, true);
	BuildId build_id;
	ASSERT_EQ(finder.FindDebugFile("[vdso]", false, build_id), fake_vdso32);
	ASSERT_EQ(finder.FindDebugFile("[vdso]", true, build_id), fake_vdso64);
	}

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, add_symbol_dir) {
	DebugElfFileFinder finder;
	ASSERT_FALSE(finder.AddSymbolDir(GetTestDataDir() + "dir_not_exist"));
	ASSERT_EQ(finder.FindDebugFile("elf", false, CHECK_ELF_FILE_BUILD_ID), "elf");
	std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + CORRECT_SYMFS_FOR_BUILD_ID_CHECK);
	ASSERT_TRUE(finder.AddSymbolDir(symfs_dir));
	ASSERT_EQ(finder.FindDebugFile("elf", false, CHECK_ELF_FILE_BUILD_ID),
	symfs_dir + OS_PATH_SEPARATOR + "elf_for_build_id_check");
	}

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, allow_mismatched_build_id) {
	DebugElfFileFinder finder;
	std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + CORRECT_SYMFS_FOR_BUILD_ID_CHECK);
	ASSERT_TRUE(finder.AddSymbolDir(symfs_dir));
	// By default, can't find binary with empty or different build ids.
	BuildId empty_build_id;
	ASSERT_EQ(finder.FindDebugFile("/data/elf_for_build_id_check", false, empty_build_id),
	"/data/elf_for_build_id_check");
	BuildId different_build_id("01234");
	ASSERT_EQ(finder.FindDebugFile("/data/elf_for_build_id_check", false, different_build_id),
	"/data/elf_for_build_id_check");

	// With AllowMismatchedBuildId(), can find binary with empty and different build ids.
	finder.AllowMismatchedBuildId();
	empty_build_id = BuildId();
	ASSERT_EQ(finder.FindDebugFile("/data/elf_for_build_id_check", false, empty_build_id),
	symfs_dir + OS_PATH_SEPARATOR + "elf_for_build_id_check");
	different_build_id = BuildId("01234");
	ASSERT_EQ(finder.FindDebugFile("/data/elf_for_build_id_check", false, different_build_id),
	symfs_dir + OS_PATH_SEPARATOR + "elf_for_build_id_check");
	}

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, build_id_list) {
	DebugElfFileFinder finder;
	// Find file in symfs dir with correct build_id_list.
	std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + "data/symfs_with_build_id_list");
	ASSERT_TRUE(finder.SetSymFsDir(symfs_dir));
	ASSERT_EQ(finder.FindDebugFile("elf", false, CHECK_ELF_FILE_BUILD_ID),
	symfs_dir + OS_PATH_SEPARATOR + "elf_for_build_id_check");

	// Find file in symfs_dir with wrong build_id_list.
	symfs_dir = ConvertPathSeparator(GetTestDataDir() + "data/symfs_with_wrong_build_id_list");
	finder.Reset();
	ASSERT_TRUE(finder.SetSymFsDir(symfs_dir));
	ASSERT_EQ(finder.FindDebugFile("elf", false, CHECK_ELF_FILE_BUILD_ID), "elf");
	}

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, no_build_id) {
	DebugElfFileFinder finder;
	// If not given a build id, we should match an elf in symfs without build id.
	std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + "data/symfs_without_build_id");
	ASSERT_TRUE(finder.SetSymFsDir(symfs_dir));
	BuildId build_id;
	ASSERT_EQ(finder.FindDebugFile("elf", false, build_id), symfs_dir + OS_PATH_SEPARATOR + "elf");
	}

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, find_basename_in_symfs_dir) {
	DebugElfFileFinder finder;
	// Find normal elf file.
	finder.SetSymFsDir(GetTestDataDir());
	BuildId build_id(ELF_FILE_BUILD_ID);
	ASSERT_EQ(finder.FindDebugFile("random_dir/elf", false, build_id), GetTestData("elf"));

	// Find embedded native library.
	ASSERT_EQ(finder.FindDebugFile("base.apk!/lib/x86_64/elf", false, build_id), GetTestData("elf"));

	// Find elf file without build id.
	std::string symfs_dir = ConvertPathSeparator(GetTestDataDir() + "data/symfs_without_build_id");
	finder.SetSymFsDir(symfs_dir);
	build_id = BuildId();
	ASSERT_EQ(finder.FindDebugFile("random_dir/elf", false, build_id),
	symfs_dir + OS_PATH_SEPARATOR + "elf");
	}

	// @CddTest = 6.1/C-0-2
	TEST(DebugElfFileFinder, build_id_mismatch) {
	DebugElfFileFinder finder;
	finder.SetSymFsDir(GetTestDataDir());
	CapturedStderr capture;
	BuildId mismatch_build_id("0c12a384a9f4a3f3659b7171ca615dbec3a81f71");
	std::string debug_file = finder.FindDebugFile(ELF_FILE, false, mismatch_build_id);
	capture.Stop();
	std::string stderr_output = capture.str();
	ASSERT_EQ(debug_file, ELF_FILE);
	ASSERT_NE(stderr_output.find("build id mismatch"), std::string::npos);
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, dex_file_dso) {
	#if defined(__linux__)
	for (DsoType dso_type : {DSO_DEX_FILE, DSO_ELF_FILE}) {
	std::unique_ptr<Dso> dso = Dso::CreateDso(dso_type, GetTestData("base.vdex"));
	ASSERT_TRUE(dso);
	dso->AddDexFileOffset(0x28);
	ASSERT_EQ(DSO_DEX_FILE, dso->type());
	const Symbol* symbol = dso->FindSymbol(0x6c77e);
	ASSERT_NE(symbol, nullptr);
	ASSERT_EQ(symbol->addr, static_cast<uint64_t>(0x6c77e));
	ASSERT_EQ(symbol->len, static_cast<uint64_t>(0x16));
	ASSERT_STREQ(symbol->DemangledName(),
	"com.example.simpleperf.simpleperfexamplewithnative.MixActivity$1.run");
	uint64_t min_vaddr;
	uint64_t file_offset_of_min_vaddr;
	dso->GetMinExecutableVaddr(&min_vaddr, &file_offset_of_min_vaddr);
	ASSERT_EQ(min_vaddr, 0);
	ASSERT_EQ(file_offset_of_min_vaddr, 0);

	// Don't crash on not exist zip entry.
	dso = Dso::CreateDso(dso_type, GetTestData("base.zip!/not_exist_entry"));
	ASSERT_TRUE(dso);
	ASSERT_EQ(nullptr, dso->FindSymbol(0));
	}
	#else
	GTEST_LOG_(INFO) << "This test only runs on linux because of libdexfile";
	#endif // defined(__linux__)
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, dex_file_offsets) {
	std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_DEX_FILE, "");
	ASSERT_TRUE(dso);
	for (uint64_t offset : {0x3, 0x1, 0x5, 0x4, 0x2, 0x4, 0x3}) {
	dso->AddDexFileOffset(offset);
	}
	ASSERT_EQ(*dso->DexFileOffsets(), std::vector<uint64_t>({0x1, 0x2, 0x3, 0x4, 0x5}));
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, embedded_elf) {
	const std::string file_path = GetUrlInApk(GetTestData(APK_FILE), NATIVELIB_IN_APK);
	std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_ELF_FILE, file_path);
	ASSERT_TRUE(dso);
	ASSERT_EQ(dso->Path(), file_path);
	ASSERT_EQ(dso->GetDebugFilePath(), file_path);
	uint64_t min_vaddr;
	uint64_t file_offset_of_min_vaddr;
	dso->GetMinExecutableVaddr(&min_vaddr, &file_offset_of_min_vaddr);
	ASSERT_EQ(min_vaddr, 0);
	ASSERT_EQ(file_offset_of_min_vaddr, 0);
	const Symbol* symbol = dso->FindSymbol(0x9a4);
	ASSERT_TRUE(symbol != nullptr);
	ASSERT_STREQ(symbol->Name(), "Java_com_example_hellojni_HelloJni_callFunc1");
	BuildId build_id;
	ASSERT_TRUE(GetBuildIdFromDsoPath(file_path, &build_id));
	ASSERT_EQ(build_id, native_lib_build_id);
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, IpToVaddrInFile) {
	std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_ELF_FILE, GetTestData("libc.so"));
	ASSERT_TRUE(dso);
	ASSERT_EQ(0xa5140, dso->IpToVaddrInFile(0xe9201140, 0xe9201000, 0xa5000));
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, kernel_address_randomization) {
	// Use ELF_FILE as a fake kernel vmlinux.
	const std::string vmlinux_path = GetTestData(ELF_FILE);
	Dso::SetVmlinux(vmlinux_path);
	std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
	ASSERT_TRUE(dso);
	ASSERT_EQ(dso->GetDebugFilePath(), vmlinux_path);
	// When map_start = 0, can't fix kernel address randomization. So vmlinux isn't used.
	ASSERT_EQ(dso->IpToVaddrInFile(0x800500, 0, 0), 0x800500);
	ASSERT_FALSE(dso->IpToFileOffset(0x800500, 0, 0));
	ASSERT_TRUE(dso->FindSymbol(0x400510) == nullptr);

	dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
	ASSERT_TRUE(dso);
	ASSERT_EQ(dso->GetDebugFilePath(), vmlinux_path);
	// When map_start != 0, can fix kernel address randomization. So vmlinux is used.
	ASSERT_EQ(dso->IpToVaddrInFile(0x800500, 0x800400, 0), 0x400500);
	ASSERT_EQ(dso->IpToFileOffset(0x800500, 0x800400, 0).value(), 0x500);
	const Symbol* symbol = dso->FindSymbol(0x400510);
	ASSERT_TRUE(symbol != nullptr);
	ASSERT_STREQ(symbol->Name(), "GlobalFunc");
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, find_vmlinux_in_symdirs) {
	// Create a symdir.
	TemporaryDir tmpdir;
	std::string vmlinux_path = std::string(tmpdir.path) + OS_PATH_SEPARATOR + "elf";
	std::string data;
	ASSERT_TRUE(android::base::ReadFileToString(GetTestData(ELF_FILE), &data));
	ASSERT_TRUE(android::base::WriteStringToFile(data, vmlinux_path));

	// Find vmlinux in symbol dirs.
	Dso::SetVmlinux("");
	Dso::AddSymbolDir(tmpdir.path);
	Dso::SetBuildIds({std::make_pair(DEFAULT_KERNEL_MMAP_NAME, BuildId(ELF_FILE_BUILD_ID))});
	std::unique_ptr<Dso> dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
	ASSERT_TRUE(dso);
	ASSERT_EQ(dso->GetDebugFilePath(), vmlinux_path);
	ASSERT_EQ(0x400927, dso->IpToVaddrInFile(0x800527, 0x800000, 0));

	// Find vmlinux by CreateDsoWithBuildId.
	Dso::SetBuildIds({});
	BuildId build_id(ELF_FILE_BUILD_ID);
	dso = Dso::CreateDsoWithBuildId(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME, build_id);
	ASSERT_TRUE(dso);
	ASSERT_EQ(dso->GetDebugFilePath(), vmlinux_path);
	ASSERT_EQ(0x400927, dso->IpToVaddrInFile(0x800527, 0x800000, 0));
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, kernel_module) {
	// Test finding debug files for kernel modules.
	Dso::SetSymFsDir(GetTestDataDir());
	std::vector<std::pair<std::string, BuildId>> build_ids;
	build_ids.emplace_back(ELF_FILE, BuildId(ELF_FILE_BUILD_ID));
	Dso::SetBuildIds(build_ids);
	std::unique_ptr<Dso> kernel_dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
	ASSERT_TRUE(kernel_dso);
	std::unique_ptr<Dso> dso = Dso::CreateKernelModuleDso(ELF_FILE, 0, 0, kernel_dso.get());
	ASSERT_EQ(dso->GetDebugFilePath(), GetTestData(ELF_FILE));
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, kernel_module_CalculateMinVaddr) {
	// Create fake Dso objects.
	auto kernel_dso = Dso::CreateDso(DSO_KERNEL, DEFAULT_KERNEL_MMAP_NAME);
	ASSERT_TRUE(kernel_dso);
	const uint64_t module_memory_start = 0xffffffa9bc790000ULL;
	const uint64_t module_memory_size = 0x8d7000ULL;
	TemporaryFile tmpfile;
	auto module_dso =
	Dso::CreateKernelModuleDso(tmpfile.path, module_memory_start,
	module_memory_start + module_memory_size, kernel_dso.get());
	ASSERT_TRUE(module_dso);

	// Provide symbol info for calculating min vaddr.
	std::vector<Symbol> kernel_symbols;
	kernel_symbols.emplace_back("fake_module_function [fake_module]", 0xffffffa9bc7a64e8ULL, 0x60c);
	kernel_dso->SetSymbols(&kernel_symbols);
	std::vector<Symbol> module_symbols;
	module_symbols.emplace_back("fake_module_function", 0x144e8, 0x60c);
	module_dso->SetSymbols(&module_symbols);

	// Calculate min vaddr.
	uint64_t min_vaddr;
	uint64_t memory_offset;
	module_dso->GetMinExecutableVaddr(&min_vaddr, &memory_offset);
	ASSERT_EQ(min_vaddr, 0x144e8);
	ASSERT_EQ(memory_offset, 0x164e8);

	// Use min vaddr in IpToVaddrInFile().
	ASSERT_EQ(module_dso->IpToVaddrInFile(0xffffffa9bc7a64e8ULL, module_memory_start, 0), 0x144e8);
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, symbol_map_file) {
	auto dso = Dso::CreateDso(DSO_SYMBOL_MAP_FILE, "perf-123.map");
	ASSERT_TRUE(dso);
	ASSERT_EQ(DSO_SYMBOL_MAP_FILE, dso->type());
	ASSERT_EQ(0x12345678, dso->IpToVaddrInFile(0x12345678, 0x0, 0x0));
	ASSERT_EQ(0x12345678, dso->IpToVaddrInFile(0x12345678, 0xe9201000, 0xa5000));
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, FunctionName) {
	Symbol symbol = Symbol("void ctep.v(cteo, ctgc, ctbn)", 0x0, 0x1);
	ASSERT_EQ(symbol.FunctionName(), "ctep.v");
	symbol = Symbol("ctep.v(cteo, ctgc, ctbn)", 0x0, 0x1);
	ASSERT_EQ(symbol.FunctionName(), "ctep.v");
	symbol = Symbol("ctep.v", 0x0, 0x1);
	ASSERT_EQ(symbol.FunctionName(), "ctep.v");
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, search_debug_file_only_when_needed) {
	Dso::SetBuildIds({std::make_pair("/elf", BuildId("1b12a384a9f4a3f3659b7171ca615dbec3a81f71"))});
	Dso::SetSymFsDir(GetTestDataDir());
	CapturedStderr capture;
	auto dso = Dso::CreateDso(DSO_ELF_FILE, "/elf");
	ASSERT_EQ(capture.str().find("build id mismatch"), std::string::npos);
	ASSERT_EQ(dso->GetDebugFilePath(), "/elf");
	ASSERT_NE(capture.str().find("build id mismatch"), std::string::npos);
	capture.Stop();
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, read_symbol_warning) {
	{
	// Don't warn when the file may not be an ELF file.
	auto dso = Dso::CreateDso(DSO_ELF_FILE, GetTestData("not_exist_file"));
	CapturedStderr capture;
	dso->LoadSymbols();
	ASSERT_EQ(capture.str().find("failed to read symbols"), std::string::npos);
	}
	{
	// Don't warn when the file may not be an ELF file.
	auto dso = Dso::CreateDso(DSO_ELF_FILE, GetTestData("base.vdex"));
	CapturedStderr capture;
	dso->LoadSymbols();
	ASSERT_EQ(capture.str().find("failed to read symbols"), std::string::npos);
	}
	{
	// Warn when the file is an ELF file (having a build id).
	std::string file_path = GetTestData("not_exist_file");
	Dso::SetBuildIds(
	{std::make_pair(file_path, BuildId("1b12a384a9f4a3f3659b7171ca615dbec3a81f71"))});
	auto dso = Dso::CreateDso(DSO_ELF_FILE, file_path);
	CapturedStderr capture;
	dso->LoadSymbols();
	ASSERT_NE(capture.str().find("failed to read symbols"), std::string::npos);
	}
	{
	// Don't warn when we already have symbols.
	std::string file_path = GetTestData("not_exist_file");
	Dso::SetBuildIds(
	{std::make_pair(file_path, BuildId("1b12a384a9f4a3f3659b7171ca615dbec3a81f71"))});
	auto dso = Dso::CreateDso(DSO_ELF_FILE, file_path);
	std::vector<Symbol> symbols;
	symbols.emplace_back("fake_symbol", 0x1234, 0x60);
	dso->SetSymbols(&symbols);
	CapturedStderr capture;
	dso->LoadSymbols();
	ASSERT_EQ(capture.str().find("failed to read symbols"), std::string::npos);
	}
	}

	// @CddTest = 6.1/C-0-2
	TEST(dso, demangle) {
	ASSERT_EQ(Dso::Demangle("main"), "main");
	ASSERT_EQ(Dso::Demangle("_ZN4main4main17h2a68d4d833d7495aE"), "main::main::h2a68d4d833d7495a");
	#if defined(__linux__) \|\| defined(__darwin__)
	// Demangling rust symbol is only supported on linux and darwin.
	ASSERT_EQ(Dso::Demangle("_RNvC6_123foo3bar"), "123foo::bar");
	#endif
	}