Yabin Cui | ed91cd9 | 2015-04-28 15:54:13 -0700 | [diff] [blame^] | 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_H_ |
| 18 | #define SIMPLE_PERF_RECORD_H_ |
| 19 | |
| 20 | #include <string> |
| 21 | #include <vector> |
| 22 | |
| 23 | #include "perf_event.h" |
| 24 | |
| 25 | struct KernelMmap; |
| 26 | struct ModuleMmap; |
| 27 | struct ThreadComm; |
| 28 | struct ThreadMmap; |
| 29 | |
| 30 | enum user_record_type { |
| 31 | PERF_RECORD_ATTR = 64, |
| 32 | PERF_RECORD_EVENT_TYPE, |
| 33 | PERF_RECORD_TRACING_DATA, |
| 34 | PERF_RECORD_BUILD_ID, |
| 35 | PERF_RECORD_FINISHED_ROUND, |
| 36 | }; |
| 37 | |
| 38 | struct PerfSampleIpType { |
| 39 | uint64_t ip; |
| 40 | }; |
| 41 | |
| 42 | struct PerfSampleTidType { |
| 43 | uint32_t pid, tid; |
| 44 | }; |
| 45 | |
| 46 | struct PerfSampleTimeType { |
| 47 | uint64_t time; |
| 48 | }; |
| 49 | |
| 50 | struct PerfSampleAddrType { |
| 51 | uint64_t addr; |
| 52 | }; |
| 53 | |
| 54 | struct PerfSampleIdType { |
| 55 | uint64_t id; |
| 56 | }; |
| 57 | |
| 58 | struct PerfSampleStreamIdType { |
| 59 | uint64_t stream_id; |
| 60 | }; |
| 61 | |
| 62 | struct PerfSampleCpuType { |
| 63 | uint32_t cpu, res; |
| 64 | }; |
| 65 | |
| 66 | struct PerfSamplePeriodType { |
| 67 | uint64_t period; |
| 68 | }; |
| 69 | |
| 70 | // SampleId is optional at the end of a record in binary format. Its content is determined by |
| 71 | // sample_id_all and sample_type in perf_event_attr. To avoid the complexity of referring to |
| 72 | // perf_event_attr each time, we copy sample_id_all and sample_type inside the SampleId structure. |
| 73 | struct SampleId { |
| 74 | bool sample_id_all; |
| 75 | uint64_t sample_type; |
| 76 | |
| 77 | PerfSampleTidType tid_data; // Valid if sample_id_all && PERF_SAMPLE_TID. |
| 78 | PerfSampleTimeType time_data; // Valid if sample_id_all && PERF_SAMPLE_TIME. |
| 79 | PerfSampleIdType id_data; // Valid if sample_id_all && PERF_SAMPLE_ID. |
| 80 | PerfSampleStreamIdType stream_id_data; // Valid if sample_id_all && PERF_SAMPLE_STREAM_ID. |
| 81 | PerfSampleCpuType cpu_data; // Valid if sample_id_all && PERF_SAMPLE_CPU. |
| 82 | |
| 83 | SampleId(); |
| 84 | |
| 85 | // Create the content of sample_id. It depends on the attr we use. |
| 86 | size_t CreateContent(const perf_event_attr& attr); |
| 87 | |
| 88 | // Parse sample_id from binary format in the buffer pointed by p. |
| 89 | void ReadFromBinaryFormat(const perf_event_attr& attr, const char* p, const char* end); |
| 90 | |
| 91 | // Write the binary format of sample_id to the buffer pointed by p. |
| 92 | void WriteToBinaryFormat(char*& p) const; |
| 93 | void Dump(size_t indent) const; |
| 94 | }; |
| 95 | |
| 96 | // Usually one record contains the following three parts in order in binary format: |
| 97 | // perf_event_header (at the head of a record, containing type and size information) |
| 98 | // data depends on the record type |
| 99 | // sample_id (optional part at the end of a record) |
| 100 | // We hold the common parts (perf_event_header and sample_id) in the base class Record, and |
| 101 | // hold the type specific data part in classes derived from Record. |
| 102 | struct Record { |
| 103 | perf_event_header header; |
| 104 | SampleId sample_id; |
| 105 | |
| 106 | Record(); |
| 107 | Record(const perf_event_header* pheader); |
| 108 | |
| 109 | virtual ~Record() { |
| 110 | } |
| 111 | |
| 112 | void Dump(size_t indent = 0) const; |
| 113 | |
| 114 | protected: |
| 115 | virtual void DumpData(size_t) const { |
| 116 | } |
| 117 | }; |
| 118 | |
| 119 | struct MmapRecord : public Record { |
| 120 | struct MmapRecordDataType { |
| 121 | uint32_t pid, tid; |
| 122 | uint64_t addr; |
| 123 | uint64_t len; |
| 124 | uint64_t pgoff; |
| 125 | } data; |
| 126 | std::string filename; |
| 127 | |
| 128 | MmapRecord() { // For storage in std::vector. |
| 129 | } |
| 130 | |
| 131 | MmapRecord(const perf_event_attr& attr, const perf_event_header* pheader); |
| 132 | void DumpData(size_t indent) const override; |
| 133 | std::vector<char> BinaryFormat() const; |
| 134 | }; |
| 135 | |
| 136 | struct CommRecord : public Record { |
| 137 | struct CommRecordDataType { |
| 138 | uint32_t pid, tid; |
| 139 | } data; |
| 140 | std::string comm; |
| 141 | |
| 142 | CommRecord() { |
| 143 | } |
| 144 | |
| 145 | CommRecord(const perf_event_attr& attr, const perf_event_header* pheader); |
| 146 | void DumpData(size_t indent) const override; |
| 147 | std::vector<char> BinaryFormat() const; |
| 148 | }; |
| 149 | |
| 150 | struct ExitRecord : public Record { |
| 151 | struct ExitRecordDataType { |
| 152 | uint32_t pid, ppid; |
| 153 | uint32_t tid, ptid; |
| 154 | uint64_t time; |
| 155 | } data; |
| 156 | |
| 157 | ExitRecord(const perf_event_attr& attr, const perf_event_header* pheader); |
| 158 | void DumpData(size_t indent) const override; |
| 159 | }; |
| 160 | |
| 161 | struct SampleRecord : public Record { |
| 162 | uint64_t sample_type; // sample_type is a bit mask determining which fields below are valid. |
| 163 | |
| 164 | PerfSampleIpType ip_data; // Valid if PERF_SAMPLE_IP. |
| 165 | PerfSampleTidType tid_data; // Valid if PERF_SAMPLE_TID. |
| 166 | PerfSampleTimeType time_data; // Valid if PERF_SAMPLE_TIME. |
| 167 | PerfSampleAddrType addr_data; // Valid if PERF_SAMPLE_ADDR. |
| 168 | PerfSampleIdType id_data; // Valid if PERF_SAMPLE_ID. |
| 169 | PerfSampleStreamIdType stream_id_data; // Valid if PERF_SAMPLE_STREAM_ID. |
| 170 | PerfSampleCpuType cpu_data; // Valid if PERF_SAMPLE_CPU. |
| 171 | PerfSamplePeriodType period_data; // Valid if PERF_SAMPLE_PERIOD. |
| 172 | |
| 173 | SampleRecord(const perf_event_attr& attr, const perf_event_header* pheader); |
| 174 | void DumpData(size_t indent) const override; |
| 175 | }; |
| 176 | |
| 177 | std::unique_ptr<const Record> ReadRecordFromBuffer(const perf_event_attr& attr, |
| 178 | const perf_event_header* pheader); |
| 179 | |
| 180 | #endif // SIMPLE_PERF_RECORD_H_ |