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/*
* 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.
*/
#ifndef SIMPLE_PERF_RECORD_FILE_FORMAT_H_
#define SIMPLE_PERF_RECORD_FILE_FORMAT_H_
#include "perf_event.h"
// The file structure of perf.data:
// file_header
// id_section
// attr section
// data section
// feature section
//
// The feature section has the following structure:
// a section descriptor array, each element contains the section information of one add_feature.
// data section of feature 1
// data section of feature 2
// ....
namespace PerfFileFormat {
enum {
FEAT_RESERVED = 0,
FEAT_FIRST_FEATURE = 1,
FEAT_TRACING_DATA = 1,
FEAT_BUILD_ID,
FEAT_HOSTNAME,
FEAT_OSRELEASE,
FEAT_VERSION,
FEAT_ARCH,
FEAT_NRCPUS,
FEAT_CPUDESC,
FEAT_CPUID,
FEAT_TOTAL_MEM,
FEAT_CMDLINE,
FEAT_EVENT_DESC,
FEAT_CPU_TOPOLOGY,
FEAT_NUMA_TOPOLOGY,
FEAT_BRANCH_STACK,
FEAT_PMU_MAPPINGS,
FEAT_GROUP_DESC,
FEAT_LAST_FEATURE,
FEAT_MAX_NUM = 256,
};
struct SectionDesc {
uint64_t offset;
uint64_t size;
};
constexpr char PERF_MAGIC[] = "PERFILE2";
struct FileHeader {
char magic[8];
uint64_t header_size;
uint64_t attr_size;
SectionDesc attrs;
SectionDesc data;
SectionDesc event_types;
unsigned char features[FEAT_MAX_NUM / 8];
};
struct FileAttr {
perf_event_attr attr;
SectionDesc ids;
};
} // namespace PerfFileFormat
#endif // SIMPLE_PERF_RECORD_FILE_FORMAT_H_
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