1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SIMPLE_PERF_RECORD_FILE_FORMAT_H_ 18 #define SIMPLE_PERF_RECORD_FILE_FORMAT_H_ 19 20 #include "perf_event.h" 21 22 // The file structure of perf.data: 23 // file_header 24 // id_section 25 // attr section 26 // data section 27 // feature section 28 // 29 // The feature section has the following structure: 30 // a section descriptor array, each element contains the section information of one add_feature. 31 // data section of feature 1 32 // data section of feature 2 33 // .... 34 35 // file feature section: 36 // file_struct files[]; 37 // 38 // struct file_struct { 39 // uint32_t size; // size of rest fields in file_struct 40 // char file_path[]; 41 // uint32_t file_type; 42 // uint64_t min_vaddr; 43 // uint32_t symbol_count; 44 // struct { 45 // uint64_t start_vaddr; 46 // uint32_t len; 47 // char symbol_name[]; 48 // } symbol_table; 49 // }; 50 51 namespace PerfFileFormat { 52 53 enum { 54 FEAT_RESERVED = 0, 55 FEAT_FIRST_FEATURE = 1, 56 FEAT_TRACING_DATA = 1, 57 FEAT_BUILD_ID, 58 FEAT_HOSTNAME, 59 FEAT_OSRELEASE, 60 FEAT_VERSION, 61 FEAT_ARCH, 62 FEAT_NRCPUS, 63 FEAT_CPUDESC, 64 FEAT_CPUID, 65 FEAT_TOTAL_MEM, 66 FEAT_CMDLINE, 67 FEAT_EVENT_DESC, 68 FEAT_CPU_TOPOLOGY, 69 FEAT_NUMA_TOPOLOGY, 70 FEAT_BRANCH_STACK, 71 FEAT_PMU_MAPPINGS, 72 FEAT_GROUP_DESC, 73 FEAT_LAST_FEATURE, 74 75 FEAT_SIMPLEPERF_START = 128, 76 FEAT_FILE = FEAT_SIMPLEPERF_START, 77 FEAT_MAX_NUM = 256, 78 }; 79 80 struct SectionDesc { 81 uint64_t offset; 82 uint64_t size; 83 }; 84 85 constexpr char PERF_MAGIC[] = "PERFILE2"; 86 87 struct FileHeader { 88 char magic[8]; 89 uint64_t header_size; 90 uint64_t attr_size; 91 SectionDesc attrs; 92 SectionDesc data; 93 SectionDesc event_types; 94 unsigned char features[FEAT_MAX_NUM / 8]; 95 }; 96 97 struct FileAttr { 98 perf_event_attr attr; 99 SectionDesc ids; 100 }; 101 102 } // namespace PerfFileFormat 103 104 #endif // SIMPLE_PERF_RECORD_FILE_FORMAT_H_ 105
