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

 /*
  * Copyright (C) 2015 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 <gtest/gtest.h>

 #include <string.h>

 #include <memory>
 #include <vector>

 #include <android-base/file.h>

 #include "environment.h"
 #include "event_attr.h"
 #include "event_type.h"
 #include "record.h"
 #include "record_file.h"
 #include "utils.h"

 #include "record_equal_test.h"

 using namespace simpleperf;
 using namespace simpleperf::PerfFileFormat;

 // @CddTest = 6.1/C-0-2
 class RecordFileTest : public ::testing::Test {
  protected:
   void SetUp() override { close(tmpfile_.release()); }

   void AddEventType(const std::string& event_type_str) {
     uint64_t fake_id = attr_ids_.size();
     attr_ids_.resize(attr_ids_.size() + 1);
     EventAttrWithId& attr_id = attr_ids_.back();
     std::unique_ptr<EventTypeAndModifier> event_type_modifier = ParseEventType(event_type_str);
     ASSERT_TRUE(event_type_modifier != nullptr);
     attr_id.attr = CreateDefaultPerfEventAttr(event_type_modifier->event_type);
     attr_id.attr.sample_id_all = 1;
     attr_id.ids.push_back(fake_id);
   }

   TemporaryFile tmpfile_;
   EventAttrIds attr_ids_;
 };

 // @CddTest = 6.1/C-0-2
 TEST_F(RecordFileTest, smoke) {
   // Write to a record file.
   std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(writer != nullptr);

   // Write attr section.
   AddEventType("cpu-cycles");
   ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

   // Write data section.
   MmapRecord mmap_record(attr_ids_[0].attr, true, 1, 1, 0x1000, 0x2000, 0x3000,
                          "mmap_record_example", attr_ids_[0].ids[0]);
   ASSERT_TRUE(writer->WriteRecord(mmap_record));

   // Write feature section.
   ASSERT_TRUE(writer->BeginWriteFeatures(1));
   char p[BuildId::Size()];
   for (size_t i = 0; i < BuildId::Size(); ++i) {
     p[i] = i;
   }
   BuildId build_id(p);
   std::vector<BuildIdRecord> build_id_records;
   build_id_records.push_back(BuildIdRecord(false, getpid(), build_id, "init"));
   ASSERT_TRUE(writer->WriteBuildIdFeature(build_id_records));
   ASSERT_TRUE(writer->EndWriteFeatures());
   ASSERT_TRUE(writer->Close());

   // Read from a record file.
   std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(reader != nullptr);
   const EventAttrIds& attrs = reader->AttrSection();
   ASSERT_EQ(1u, attrs.size());
   ASSERT_EQ(0, memcmp(&attrs[0].attr, &attr_ids_[0].attr, sizeof(perf_event_attr)));
   ASSERT_EQ(attrs[0].ids, attr_ids_[0].ids);

   // Read and check data section.
   std::vector<std::unique_ptr<Record>> records = reader->DataSection();
   ASSERT_EQ(1u, records.size());
   CheckRecordEqual(mmap_record, *records[0]);

   // Read and check feature section.
   std::vector<BuildIdRecord> read_build_id_records = reader->ReadBuildIdFeature();
   ASSERT_EQ(1u, read_build_id_records.size());
   CheckRecordEqual(read_build_id_records[0], build_id_records[0]);

   ASSERT_TRUE(reader->Close());
 }

 // @CddTest = 6.1/C-0-2
 TEST_F(RecordFileTest, record_more_than_one_attr) {
   // Write to a record file.
   std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(writer != nullptr);

   // Write attr section.
   AddEventType("cpu-cycles");
   AddEventType("cpu-clock");
   AddEventType("task-clock");
   ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

   ASSERT_TRUE(writer->Close());

   // Read from a record file.
   std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(reader != nullptr);
   const EventAttrIds& attrs = reader->AttrSection();
   ASSERT_EQ(3u, attrs.size());
   for (size_t i = 0; i < attrs.size(); ++i) {
     ASSERT_EQ(0, memcmp(&attrs[i].attr, &attr_ids_[i].attr, sizeof(perf_event_attr)));
     ASSERT_EQ(attrs[i].ids, attr_ids_[i].ids);
   }
 }

 // @CddTest = 6.1/C-0-2
 TEST_F(RecordFileTest, write_meta_info_feature_section) {
   // Write to a record file.
   std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(writer != nullptr);
   AddEventType("cpu-cycles");
   ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

   // Write meta_info feature section.
   ASSERT_TRUE(writer->BeginWriteFeatures(1));
   std::unordered_map<std::string, std::string> info_map;
   for (int i = 0; i < 100; ++i) {
     std::string s = std::to_string(i);
     info_map[s] = s + s;
   }
   ASSERT_TRUE(writer->WriteMetaInfoFeature(info_map));
   ASSERT_TRUE(writer->EndWriteFeatures());
   ASSERT_TRUE(writer->Close());

   // Read from a record file.
   std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(reader != nullptr);
   ASSERT_EQ(reader->GetMetaInfoFeature(), info_map);
 }

 // @CddTest = 6.1/C-0-2
 TEST_F(RecordFileTest, write_debug_unwind_feature_section) {
   // Write to a record file.
   std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(writer != nullptr);
   AddEventType("cpu-cycles");
   ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

   // Write debug_unwind feature section.
   ASSERT_TRUE(writer->BeginWriteFeatures(1));
   DebugUnwindFeature debug_unwind(2);
   debug_unwind[0].path = "file1";
   debug_unwind[0].size = 1000;
   debug_unwind[1].path = "file2";
   debug_unwind[1].size = 2000;
   ASSERT_TRUE(writer->WriteDebugUnwindFeature(debug_unwind));
   ASSERT_TRUE(writer->EndWriteFeatures());
   ASSERT_TRUE(writer->Close());

   // Read from a record file.
   std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(reader != nullptr);
   std::optional<DebugUnwindFeature> opt_debug_unwind = reader->ReadDebugUnwindFeature();
   ASSERT_TRUE(opt_debug_unwind.has_value());
   ASSERT_EQ(opt_debug_unwind.value().size(), debug_unwind.size());
   for (size_t i = 0; i < debug_unwind.size(); i++) {
     ASSERT_EQ(opt_debug_unwind.value()[i].path, debug_unwind[i].path);
     ASSERT_EQ(opt_debug_unwind.value()[i].size, debug_unwind[i].size);
   }
 }

 // @CddTest = 6.1/C-0-2
 TEST_F(RecordFileTest, write_file2_feature_section) {
   // Write to a record file.
   std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(writer != nullptr);
   AddEventType("cpu-cycles");
   ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

   // Write file2 feature section.
   ASSERT_TRUE(writer->BeginWriteFeatures(1));
   std::vector<FileFeature> files(3);
   files[0].path = "fake_dex_file";
   files[0].type = DSO_DEX_FILE;
   files[0].min_vaddr = 0x1000;
   files[0].symbols.emplace_back("dex_symbol", 0x1001, 0x1002);
   files[0].dex_file_offsets.assign(0x1003, 0x1004);
   files[1].path = "fake_elf_file";
   files[1].type = DSO_ELF_FILE;
   files[1].min_vaddr = 0x2000;
   Symbol symbol("elf_symbol", 0x2001, 0x2002);
   files[1].symbol_ptrs.emplace_back(&symbol);
   files[1].file_offset_of_min_vaddr = 0x2003;
   files[2].path = "fake_kernel_module";
   files[2].type = DSO_KERNEL_MODULE;
   files[2].min_vaddr = 0x3000;
   files[2].symbols.emplace_back("kernel_module_symbol", 0x3001, 0x3002);
   files[2].file_offset_of_min_vaddr = 0x3003;

   for (const auto& file : files) {
     ASSERT_TRUE(writer->WriteFileFeature(file));
   }
   ASSERT_TRUE(writer->EndWriteFeatures());
   ASSERT_TRUE(writer->Close());

   // Read from a record file.
   std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(reader != nullptr);
   uint64_t read_pos = 0;
   FileFeature file;
   bool error = false;

   auto check_symbol = [](const Symbol& sym1, const Symbol& sym2) {
     return sym1.addr == sym2.addr && sym1.len == sym2.len && strcmp(sym1.Name(), sym2.Name()) == 0;
   };

   size_t file_id = 0;
   while (reader->ReadFileFeature(read_pos, file, error)) {
     ASSERT_LT(file_id, files.size());
     const FileFeature& expected_file = files[file_id++];
     ASSERT_EQ(file.path, expected_file.path);
     ASSERT_EQ(file.type, expected_file.type);
     ASSERT_EQ(file.min_vaddr, expected_file.min_vaddr);
     if (!expected_file.symbols.empty()) {
       ASSERT_EQ(file.symbols.size(), expected_file.symbols.size());
       for (size_t i = 0; i < file.symbols.size(); i++) {
         ASSERT_TRUE(check_symbol(file.symbols[i], expected_file.symbols[i]));
       }
     } else {
       ASSERT_EQ(file.symbols.size(), expected_file.symbol_ptrs.size());
       for (size_t i = 0; i < file.symbols.size(); i++) {
         ASSERT_TRUE(check_symbol(file.symbols[i], *expected_file.symbol_ptrs[i]));
       }
     }
     if (file.type == DSO_DEX_FILE) {
       ASSERT_EQ(file.dex_file_offsets, expected_file.dex_file_offsets);
     } else if (file.type == DSO_ELF_FILE) {
       ASSERT_TRUE(file.dex_file_offsets.empty());
       ASSERT_EQ(file.file_offset_of_min_vaddr, expected_file.file_offset_of_min_vaddr);
     } else if (file.type == DSO_KERNEL_MODULE) {
       ASSERT_TRUE(file.dex_file_offsets.empty());
       ASSERT_EQ(file.file_offset_of_min_vaddr, expected_file.file_offset_of_min_vaddr);
     }
   }
   ASSERT_FALSE(error);
   ASSERT_EQ(file_id, files.size());
 }

 TEST_F(RecordFileTest, init_map_feature_section) {
   // Write to a record file.
   std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(writer != nullptr);
   AddEventType("cpu-cycles");
   ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

   // Write init_map feature section.
   ASSERT_TRUE(writer->BeginWriteFeatures(1));
   MmapRecord mmap_record(attr_ids_[0].attr, true, 1, 1, 0x1000, 0x2000, 0x3000,
                          "mmap_record_example", attr_ids_[0].ids[0]);
   CommRecord comm_record(attr_ids_[0].attr, 1, 2, "comm_record_example", attr_ids_[0].ids[0], 1000);
   ASSERT_TRUE(writer->WriteInitMapFeature(mmap_record.Binary(), mmap_record.size()));
   ASSERT_TRUE(writer->WriteInitMapFeature(comm_record.Binary(), comm_record.size()));
   ASSERT_TRUE(writer->EndWriteFeatures());
   ASSERT_TRUE(writer->Close());

   // Read from the record file.
   std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(reader != nullptr);
   const EventAttrIds& attrs = reader->AttrSection();
   ASSERT_EQ(1u, attrs.size());
   ASSERT_EQ(0, memcmp(&attrs[0].attr, &attr_ids_[0].attr, sizeof(perf_event_attr)));
   ASSERT_EQ(attrs[0].ids, attr_ids_[0].ids);

   // Read and check feature section.
   int count = 0;
   auto callback = [&](std::unique_ptr<Record> r) -> bool {
     if (count == 0) {
       CheckRecordEqual(mmap_record, *r);
     } else if (count == 1) {
       CheckRecordEqual(comm_record, *r);
     }
     count++;
     return true;
   };
   ASSERT_TRUE(reader->ReadInitMapFeature(callback));
   ASSERT_EQ(count, 2);
 }

 // @CddTest = 6.1/C-0-2
 TEST_F(RecordFileTest, compression) {
   // Write to a record file.
   std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(writer != nullptr);
   ASSERT_TRUE(writer->SetCompressionLevel(3));

   // Write attr section.
   AddEventType("cpu-cycles");
   ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

   // Write data section.
   MmapRecord mmap_record(attr_ids_[0].attr, true, 1, 1, 0x1000, 0x2000, 0x3000,
                          "mmap_record_example", attr_ids_[0].ids[0]);
   CommRecord comm_record(attr_ids_[0].attr, 1, 2, "comm_record_example", attr_ids_[0].ids[0], 1000);
   const size_t repeat_count = 100;
   for (size_t i = 0; i < repeat_count; i++) {
     ASSERT_TRUE(writer->WriteRecord(mmap_record));
     ASSERT_TRUE(writer->WriteRecord(comm_record));
   }
   ASSERT_TRUE(writer->FinishWritingDataSection());
   ASSERT_TRUE(writer->Close());

   // Read from a record file.
   std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
   ASSERT_TRUE(reader != nullptr);
   const EventAttrIds& attrs = reader->AttrSection();
   ASSERT_EQ(1u, attrs.size());
   ASSERT_EQ(0, memcmp(&attrs[0].attr, &attr_ids_[0].attr, sizeof(perf_event_attr)));
   ASSERT_EQ(attrs[0].ids, attr_ids_[0].ids);

   // Read and check data section.
   std::vector<std::unique_ptr<Record>> records = reader->DataSection();
   ASSERT_EQ(repeat_count * 2, records.size());
   for (size_t i = 0; i < repeat_count; i++) {
     CheckRecordEqual(mmap_record, *records[i * 2]);
     CheckRecordEqual(comm_record, *records[i * 2 + 1]);
   }
   ASSERT_TRUE(reader->Close());
 }
	/*
	* Copyright (C) 2015 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 <gtest/gtest.h>

	#include <string.h>

	#include <memory>
	#include <vector>

	#include <android-base/file.h>

	#include "environment.h"
	#include "event_attr.h"
	#include "event_type.h"
	#include "record.h"
	#include "record_file.h"
	#include "utils.h"

	#include "record_equal_test.h"

	using namespace simpleperf;
	using namespace simpleperf::PerfFileFormat;

	// @CddTest = 6.1/C-0-2
	class RecordFileTest : public ::testing::Test {
	protected:
	void SetUp() override { close(tmpfile_.release()); }

	void AddEventType(const std::string& event_type_str) {
	uint64_t fake_id = attr_ids_.size();
	attr_ids_.resize(attr_ids_.size() + 1);
	EventAttrWithId& attr_id = attr_ids_.back();
	std::unique_ptr<EventTypeAndModifier> event_type_modifier = ParseEventType(event_type_str);
	ASSERT_TRUE(event_type_modifier != nullptr);
	attr_id.attr = CreateDefaultPerfEventAttr(event_type_modifier->event_type);
	attr_id.attr.sample_id_all = 1;
	attr_id.ids.push_back(fake_id);
	}

	TemporaryFile tmpfile_;
	EventAttrIds attr_ids_;
	};

	// @CddTest = 6.1/C-0-2
	TEST_F(RecordFileTest, smoke) {
	// Write to a record file.
	std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(writer != nullptr);

	// Write attr section.
	AddEventType("cpu-cycles");
	ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

	// Write data section.
	MmapRecord mmap_record(attr_ids_[0].attr, true, 1, 1, 0x1000, 0x2000, 0x3000,
	"mmap_record_example", attr_ids_[0].ids[0]);
	ASSERT_TRUE(writer->WriteRecord(mmap_record));

	// Write feature section.
	ASSERT_TRUE(writer->BeginWriteFeatures(1));
	char p[BuildId::Size()];
	for (size_t i = 0; i < BuildId::Size(); ++i) {
	p[i] = i;
	}
	BuildId build_id(p);
	std::vector<BuildIdRecord> build_id_records;
	build_id_records.push_back(BuildIdRecord(false, getpid(), build_id, "init"));
	ASSERT_TRUE(writer->WriteBuildIdFeature(build_id_records));
	ASSERT_TRUE(writer->EndWriteFeatures());
	ASSERT_TRUE(writer->Close());

	// Read from a record file.
	std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(reader != nullptr);
	const EventAttrIds& attrs = reader->AttrSection();
	ASSERT_EQ(1u, attrs.size());
	ASSERT_EQ(0, memcmp(&attrs[0].attr, &attr_ids_[0].attr, sizeof(perf_event_attr)));
	ASSERT_EQ(attrs[0].ids, attr_ids_[0].ids);

	// Read and check data section.
	std::vector<std::unique_ptr<Record>> records = reader->DataSection();
	ASSERT_EQ(1u, records.size());
	CheckRecordEqual(mmap_record, *records[0]);

	// Read and check feature section.
	std::vector<BuildIdRecord> read_build_id_records = reader->ReadBuildIdFeature();
	ASSERT_EQ(1u, read_build_id_records.size());
	CheckRecordEqual(read_build_id_records[0], build_id_records[0]);

	ASSERT_TRUE(reader->Close());
	}

	// @CddTest = 6.1/C-0-2
	TEST_F(RecordFileTest, record_more_than_one_attr) {
	// Write to a record file.
	std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(writer != nullptr);

	// Write attr section.
	AddEventType("cpu-cycles");
	AddEventType("cpu-clock");
	AddEventType("task-clock");
	ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

	ASSERT_TRUE(writer->Close());

	// Read from a record file.
	std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(reader != nullptr);
	const EventAttrIds& attrs = reader->AttrSection();
	ASSERT_EQ(3u, attrs.size());
	for (size_t i = 0; i < attrs.size(); ++i) {
	ASSERT_EQ(0, memcmp(&attrs[i].attr, &attr_ids_[i].attr, sizeof(perf_event_attr)));
	ASSERT_EQ(attrs[i].ids, attr_ids_[i].ids);
	}
	}

	// @CddTest = 6.1/C-0-2
	TEST_F(RecordFileTest, write_meta_info_feature_section) {
	// Write to a record file.
	std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(writer != nullptr);
	AddEventType("cpu-cycles");
	ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

	// Write meta_info feature section.
	ASSERT_TRUE(writer->BeginWriteFeatures(1));
	std::unordered_map<std::string, std::string> info_map;
	for (int i = 0; i < 100; ++i) {
	std::string s = std::to_string(i);
	info_map[s] = s + s;
	}
	ASSERT_TRUE(writer->WriteMetaInfoFeature(info_map));
	ASSERT_TRUE(writer->EndWriteFeatures());
	ASSERT_TRUE(writer->Close());

	// Read from a record file.
	std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(reader != nullptr);
	ASSERT_EQ(reader->GetMetaInfoFeature(), info_map);
	}

	// @CddTest = 6.1/C-0-2
	TEST_F(RecordFileTest, write_debug_unwind_feature_section) {
	// Write to a record file.
	std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(writer != nullptr);
	AddEventType("cpu-cycles");
	ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

	// Write debug_unwind feature section.
	ASSERT_TRUE(writer->BeginWriteFeatures(1));
	DebugUnwindFeature debug_unwind(2);
	debug_unwind[0].path = "file1";
	debug_unwind[0].size = 1000;
	debug_unwind[1].path = "file2";
	debug_unwind[1].size = 2000;
	ASSERT_TRUE(writer->WriteDebugUnwindFeature(debug_unwind));
	ASSERT_TRUE(writer->EndWriteFeatures());
	ASSERT_TRUE(writer->Close());

	// Read from a record file.
	std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(reader != nullptr);
	std::optional<DebugUnwindFeature> opt_debug_unwind = reader->ReadDebugUnwindFeature();
	ASSERT_TRUE(opt_debug_unwind.has_value());
	ASSERT_EQ(opt_debug_unwind.value().size(), debug_unwind.size());
	for (size_t i = 0; i < debug_unwind.size(); i++) {
	ASSERT_EQ(opt_debug_unwind.value()[i].path, debug_unwind[i].path);
	ASSERT_EQ(opt_debug_unwind.value()[i].size, debug_unwind[i].size);
	}
	}

	// @CddTest = 6.1/C-0-2
	TEST_F(RecordFileTest, write_file2_feature_section) {
	// Write to a record file.
	std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(writer != nullptr);
	AddEventType("cpu-cycles");
	ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

	// Write file2 feature section.
	ASSERT_TRUE(writer->BeginWriteFeatures(1));
	std::vector<FileFeature> files(3);
	files[0].path = "fake_dex_file";
	files[0].type = DSO_DEX_FILE;
	files[0].min_vaddr = 0x1000;
	files[0].symbols.emplace_back("dex_symbol", 0x1001, 0x1002);
	files[0].dex_file_offsets.assign(0x1003, 0x1004);
	files[1].path = "fake_elf_file";
	files[1].type = DSO_ELF_FILE;
	files[1].min_vaddr = 0x2000;
	Symbol symbol("elf_symbol", 0x2001, 0x2002);
	files[1].symbol_ptrs.emplace_back(&symbol);
	files[1].file_offset_of_min_vaddr = 0x2003;
	files[2].path = "fake_kernel_module";
	files[2].type = DSO_KERNEL_MODULE;
	files[2].min_vaddr = 0x3000;
	files[2].symbols.emplace_back("kernel_module_symbol", 0x3001, 0x3002);
	files[2].file_offset_of_min_vaddr = 0x3003;

	for (const auto& file : files) {
	ASSERT_TRUE(writer->WriteFileFeature(file));
	}
	ASSERT_TRUE(writer->EndWriteFeatures());
	ASSERT_TRUE(writer->Close());

	// Read from a record file.
	std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(reader != nullptr);
	uint64_t read_pos = 0;
	FileFeature file;
	bool error = false;

	auto check_symbol = [](const Symbol& sym1, const Symbol& sym2) {
	return sym1.addr == sym2.addr && sym1.len == sym2.len && strcmp(sym1.Name(), sym2.Name()) == 0;
	};

	size_t file_id = 0;
	while (reader->ReadFileFeature(read_pos, file, error)) {
	ASSERT_LT(file_id, files.size());
	const FileFeature& expected_file = files[file_id++];
	ASSERT_EQ(file.path, expected_file.path);
	ASSERT_EQ(file.type, expected_file.type);
	ASSERT_EQ(file.min_vaddr, expected_file.min_vaddr);
	if (!expected_file.symbols.empty()) {
	ASSERT_EQ(file.symbols.size(), expected_file.symbols.size());
	for (size_t i = 0; i < file.symbols.size(); i++) {
	ASSERT_TRUE(check_symbol(file.symbols[i], expected_file.symbols[i]));
	}
	} else {
	ASSERT_EQ(file.symbols.size(), expected_file.symbol_ptrs.size());
	for (size_t i = 0; i < file.symbols.size(); i++) {
	ASSERT_TRUE(check_symbol(file.symbols[i], *expected_file.symbol_ptrs[i]));
	}
	}
	if (file.type == DSO_DEX_FILE) {
	ASSERT_EQ(file.dex_file_offsets, expected_file.dex_file_offsets);
	} else if (file.type == DSO_ELF_FILE) {
	ASSERT_TRUE(file.dex_file_offsets.empty());
	ASSERT_EQ(file.file_offset_of_min_vaddr, expected_file.file_offset_of_min_vaddr);
	} else if (file.type == DSO_KERNEL_MODULE) {
	ASSERT_TRUE(file.dex_file_offsets.empty());
	ASSERT_EQ(file.file_offset_of_min_vaddr, expected_file.file_offset_of_min_vaddr);
	}
	}
	ASSERT_FALSE(error);
	ASSERT_EQ(file_id, files.size());
	}

	TEST_F(RecordFileTest, init_map_feature_section) {
	// Write to a record file.
	std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(writer != nullptr);
	AddEventType("cpu-cycles");
	ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

	// Write init_map feature section.
	ASSERT_TRUE(writer->BeginWriteFeatures(1));
	MmapRecord mmap_record(attr_ids_[0].attr, true, 1, 1, 0x1000, 0x2000, 0x3000,
	"mmap_record_example", attr_ids_[0].ids[0]);
	CommRecord comm_record(attr_ids_[0].attr, 1, 2, "comm_record_example", attr_ids_[0].ids[0], 1000);
	ASSERT_TRUE(writer->WriteInitMapFeature(mmap_record.Binary(), mmap_record.size()));
	ASSERT_TRUE(writer->WriteInitMapFeature(comm_record.Binary(), comm_record.size()));
	ASSERT_TRUE(writer->EndWriteFeatures());
	ASSERT_TRUE(writer->Close());

	// Read from the record file.
	std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(reader != nullptr);
	const EventAttrIds& attrs = reader->AttrSection();
	ASSERT_EQ(1u, attrs.size());
	ASSERT_EQ(0, memcmp(&attrs[0].attr, &attr_ids_[0].attr, sizeof(perf_event_attr)));
	ASSERT_EQ(attrs[0].ids, attr_ids_[0].ids);

	// Read and check feature section.
	int count = 0;
	auto callback = [&](std::unique_ptr<Record> r) -> bool {
	if (count == 0) {
	CheckRecordEqual(mmap_record, *r);
	} else if (count == 1) {
	CheckRecordEqual(comm_record, *r);
	}
	count++;
	return true;
	};
	ASSERT_TRUE(reader->ReadInitMapFeature(callback));
	ASSERT_EQ(count, 2);
	}

	// @CddTest = 6.1/C-0-2
	TEST_F(RecordFileTest, compression) {
	// Write to a record file.
	std::unique_ptr<RecordFileWriter> writer = RecordFileWriter::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(writer != nullptr);
	ASSERT_TRUE(writer->SetCompressionLevel(3));

	// Write attr section.
	AddEventType("cpu-cycles");
	ASSERT_TRUE(writer->WriteAttrSection(attr_ids_));

	// Write data section.
	MmapRecord mmap_record(attr_ids_[0].attr, true, 1, 1, 0x1000, 0x2000, 0x3000,
	"mmap_record_example", attr_ids_[0].ids[0]);
	CommRecord comm_record(attr_ids_[0].attr, 1, 2, "comm_record_example", attr_ids_[0].ids[0], 1000);
	const size_t repeat_count = 100;
	for (size_t i = 0; i < repeat_count; i++) {
	ASSERT_TRUE(writer->WriteRecord(mmap_record));
	ASSERT_TRUE(writer->WriteRecord(comm_record));
	}
	ASSERT_TRUE(writer->FinishWritingDataSection());
	ASSERT_TRUE(writer->Close());

	// Read from a record file.
	std::unique_ptr<RecordFileReader> reader = RecordFileReader::CreateInstance(tmpfile_.path);
	ASSERT_TRUE(reader != nullptr);
	const EventAttrIds& attrs = reader->AttrSection();
	ASSERT_EQ(1u, attrs.size());
	ASSERT_EQ(0, memcmp(&attrs[0].attr, &attr_ids_[0].attr, sizeof(perf_event_attr)));
	ASSERT_EQ(attrs[0].ids, attr_ids_[0].ids);

	// Read and check data section.
	std::vector<std::unique_ptr<Record>> records = reader->DataSection();
	ASSERT_EQ(repeat_count * 2, records.size());
	for (size_t i = 0; i < repeat_count; i++) {
	CheckRecordEqual(mmap_record, records[i 2]);
	CheckRecordEqual(comm_record, records[i 2 + 1]);
	}
	ASSERT_TRUE(reader->Close());
	}