151 lines
3.5 KiB
C++
151 lines
3.5 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SIMPLE_PERF_RECORD_FILE_FORMAT_H_
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#define SIMPLE_PERF_RECORD_FILE_FORMAT_H_
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#include <string>
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#include "perf_event.h"
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/*
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The file structure of perf.data:
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file_header
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id_section
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attr section
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data section
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feature section
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The feature section has the following structure:
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a section descriptor array, each element contains the section information of one add_feature.
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data section of feature 1
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data section of feature 2
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....
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file feature section:
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file_struct files[];
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struct file_struct {
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uint32_t size; // size of rest fields in file_struct
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char file_path[];
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uint32_t file_type;
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uint64_t min_vaddr;
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uint32_t symbol_count;
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struct {
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uint64_t start_vaddr;
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uint32_t len;
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char symbol_name[len+1];
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} symbol_table[symbol_count];
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uint32_t dex_file_offset_count; // Only when file_type = DSO_DEX_FILE
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uint64_t dex_file_offsets[dex_file_offset_count]; // Only when file_type = DSO_DEX_FILE
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uint64_t file_offset_of_min_vaddr; // Only when file_type = DSO_ELF_FILE
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uint64_t memory_offset_of_min_vaddr; // Only when file_type = DSO_KERNEL_MODULE
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};
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meta_info feature section:
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meta_info infos[];
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struct meta_info {
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char key[];
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char value[];
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};
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keys in meta_info feature section include:
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simpleperf_version,
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debug_unwind feature section:
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message DebugUnwindFeature from record_file.proto
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debug_unwind_file feature section:
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data for file 1
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data for file 2
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...
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The file list is stored in debug_unwind feature section.
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file2 feature section (used to replace file feature section):
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uint32_t file_msg1_size;
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FileFeature file_msg1; // FileFeature from record_file.proto
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uint32_t file_msg2_size;
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FileFeature file_msg2;
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...
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*/
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namespace simpleperf {
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namespace PerfFileFormat {
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enum {
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FEAT_RESERVED = 0,
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FEAT_FIRST_FEATURE = 1,
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FEAT_TRACING_DATA = 1,
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FEAT_BUILD_ID,
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FEAT_HOSTNAME,
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FEAT_OSRELEASE,
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FEAT_VERSION,
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FEAT_ARCH,
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FEAT_NRCPUS,
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FEAT_CPUDESC,
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FEAT_CPUID,
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FEAT_TOTAL_MEM,
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FEAT_CMDLINE,
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FEAT_EVENT_DESC,
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FEAT_CPU_TOPOLOGY,
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FEAT_NUMA_TOPOLOGY,
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FEAT_BRANCH_STACK,
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FEAT_PMU_MAPPINGS,
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FEAT_GROUP_DESC,
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FEAT_AUXTRACE,
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FEAT_LAST_FEATURE,
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FEAT_SIMPLEPERF_START = 128,
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FEAT_FILE = FEAT_SIMPLEPERF_START,
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FEAT_META_INFO,
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FEAT_DEBUG_UNWIND,
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FEAT_DEBUG_UNWIND_FILE,
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FEAT_FILE2,
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FEAT_MAX_NUM = 256,
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};
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std::string GetFeatureName(int feature_id);
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int GetFeatureId(const std::string& feature_name);
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struct SectionDesc {
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uint64_t offset;
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uint64_t size;
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};
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constexpr char PERF_MAGIC[] = "PERFILE2";
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struct FileHeader {
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char magic[8];
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uint64_t header_size;
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uint64_t attr_size;
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SectionDesc attrs;
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SectionDesc data;
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SectionDesc event_types;
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unsigned char features[FEAT_MAX_NUM / 8];
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};
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struct FileAttr {
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perf_event_attr attr;
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SectionDesc ids;
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};
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} // namespace PerfFileFormat
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} // namespace simpleperf
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#endif // SIMPLE_PERF_RECORD_FILE_FORMAT_H_
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