773 lines
26 KiB
C++
773 lines
26 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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#include "record.h"
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#include <inttypes.h>
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#include <algorithm>
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#include <unordered_map>
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include "environment.h"
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#include "perf_regs.h"
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#include "utils.h"
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static std::string RecordTypeToString(int record_type) {
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static std::unordered_map<int, std::string> record_type_names = {
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{PERF_RECORD_MMAP, "mmap"}, {PERF_RECORD_LOST, "lost"},
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{PERF_RECORD_COMM, "comm"}, {PERF_RECORD_EXIT, "exit"},
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{PERF_RECORD_THROTTLE, "throttle"}, {PERF_RECORD_UNTHROTTLE, "unthrottle"},
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{PERF_RECORD_FORK, "fork"}, {PERF_RECORD_READ, "read"},
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{PERF_RECORD_SAMPLE, "sample"}, {PERF_RECORD_BUILD_ID, "build_id"},
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{PERF_RECORD_MMAP2, "mmap2"},
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};
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auto it = record_type_names.find(record_type);
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if (it != record_type_names.end()) {
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return it->second;
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}
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return android::base::StringPrintf("unknown(%d)", record_type);
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}
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template <class T>
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void MoveFromBinaryFormat(T* data_p, size_t n, const char*& p) {
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size_t size = n * sizeof(T);
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memcpy(data_p, p, size);
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p += size;
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}
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template <class T>
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void MoveToBinaryFormat(const T& data, char*& p) {
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*reinterpret_cast<T*>(p) = data;
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p += sizeof(T);
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}
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template <class T>
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void MoveToBinaryFormat(const T* data_p, size_t n, char*& p) {
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size_t size = n * sizeof(T);
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memcpy(p, data_p, size);
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p += size;
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}
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SampleId::SampleId() {
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memset(this, 0, sizeof(SampleId));
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}
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// Return sample_id size in binary format.
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size_t SampleId::CreateContent(const perf_event_attr& attr) {
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sample_id_all = attr.sample_id_all;
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sample_type = attr.sample_type;
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// Other data are not necessary. TODO: Set missing SampleId data.
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return Size();
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}
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void SampleId::ReadFromBinaryFormat(const perf_event_attr& attr, const char* p, const char* end) {
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sample_id_all = attr.sample_id_all;
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sample_type = attr.sample_type;
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if (sample_id_all) {
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if (sample_type & PERF_SAMPLE_TID) {
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MoveFromBinaryFormat(tid_data, p);
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}
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if (sample_type & PERF_SAMPLE_TIME) {
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MoveFromBinaryFormat(time_data, p);
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}
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if (sample_type & PERF_SAMPLE_ID) {
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MoveFromBinaryFormat(id_data, p);
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}
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if (sample_type & PERF_SAMPLE_STREAM_ID) {
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MoveFromBinaryFormat(stream_id_data, p);
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}
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if (sample_type & PERF_SAMPLE_CPU) {
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MoveFromBinaryFormat(cpu_data, p);
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}
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// TODO: Add parsing of PERF_SAMPLE_IDENTIFIER.
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}
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CHECK_LE(p, end);
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if (p < end) {
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LOG(DEBUG) << "Record SampleId part has " << end - p << " bytes left\n";
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}
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}
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void SampleId::WriteToBinaryFormat(char*& p) const {
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if (sample_id_all) {
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if (sample_type & PERF_SAMPLE_TID) {
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MoveToBinaryFormat(tid_data, p);
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}
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if (sample_type & PERF_SAMPLE_TIME) {
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MoveToBinaryFormat(time_data, p);
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}
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if (sample_type & PERF_SAMPLE_ID) {
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MoveToBinaryFormat(id_data, p);
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}
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if (sample_type & PERF_SAMPLE_STREAM_ID) {
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MoveToBinaryFormat(stream_id_data, p);
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}
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if (sample_type & PERF_SAMPLE_CPU) {
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MoveToBinaryFormat(cpu_data, p);
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}
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}
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}
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void SampleId::Dump(size_t indent) const {
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if (sample_id_all) {
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if (sample_type & PERF_SAMPLE_TID) {
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PrintIndented(indent, "sample_id: pid %u, tid %u\n", tid_data.pid, tid_data.tid);
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}
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if (sample_type & PERF_SAMPLE_TIME) {
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PrintIndented(indent, "sample_id: time %" PRId64 "\n", time_data.time);
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}
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if (sample_type & PERF_SAMPLE_ID) {
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PrintIndented(indent, "sample_id: stream_id %" PRId64 "\n", id_data.id);
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}
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if (sample_type & PERF_SAMPLE_STREAM_ID) {
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PrintIndented(indent, "sample_id: stream_id %" PRId64 "\n", stream_id_data.stream_id);
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}
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if (sample_type & PERF_SAMPLE_CPU) {
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PrintIndented(indent, "sample_id: cpu %u, res %u\n", cpu_data.cpu, cpu_data.res);
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}
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}
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}
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size_t SampleId::Size() const {
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size_t size = 0;
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if (sample_id_all) {
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if (sample_type & PERF_SAMPLE_TID) {
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size += sizeof(PerfSampleTidType);
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}
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if (sample_type & PERF_SAMPLE_TIME) {
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size += sizeof(PerfSampleTimeType);
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}
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if (sample_type & PERF_SAMPLE_ID) {
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size += sizeof(PerfSampleIdType);
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}
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if (sample_type & PERF_SAMPLE_STREAM_ID) {
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size += sizeof(PerfSampleStreamIdType);
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}
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if (sample_type & PERF_SAMPLE_CPU) {
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size += sizeof(PerfSampleCpuType);
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}
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}
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return size;
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}
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Record::Record() {
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memset(&header, 0, sizeof(header));
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}
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Record::Record(const perf_event_header* pheader) {
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header = *pheader;
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}
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void Record::Dump(size_t indent) const {
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PrintIndented(indent, "record %s: type %u, misc %u, size %u\n",
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RecordTypeToString(header.type).c_str(), header.type, header.misc, header.size);
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DumpData(indent + 1);
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sample_id.Dump(indent + 1);
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}
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uint64_t Record::Timestamp() const {
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return sample_id.time_data.time;
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}
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MmapRecord::MmapRecord(const perf_event_attr& attr, const perf_event_header* pheader)
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: Record(pheader) {
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const char* p = reinterpret_cast<const char*>(pheader + 1);
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const char* end = reinterpret_cast<const char*>(pheader) + pheader->size;
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MoveFromBinaryFormat(data, p);
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filename = p;
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p += ALIGN(filename.size() + 1, 8);
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CHECK_LE(p, end);
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sample_id.ReadFromBinaryFormat(attr, p, end);
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}
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std::vector<char> MmapRecord::BinaryFormat() const {
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std::vector<char> buf(header.size);
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char* p = buf.data();
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MoveToBinaryFormat(header, p);
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MoveToBinaryFormat(data, p);
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strcpy(p, filename.c_str());
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p += ALIGN(filename.size() + 1, 8);
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sample_id.WriteToBinaryFormat(p);
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return buf;
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}
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void MmapRecord::AdjustSizeBasedOnData() {
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header.size = sizeof(header) + sizeof(data) + ALIGN(filename.size() + 1, 8) + sample_id.Size();
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}
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void MmapRecord::DumpData(size_t indent) const {
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PrintIndented(indent, "pid %u, tid %u, addr 0x%" PRIx64 ", len 0x%" PRIx64 "\n", data.pid,
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data.tid, data.addr, data.len);
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PrintIndented(indent, "pgoff 0x%" PRIx64 ", filename %s\n", data.pgoff, filename.c_str());
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}
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Mmap2Record::Mmap2Record(const perf_event_attr& attr, const perf_event_header* pheader)
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: Record(pheader) {
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const char* p = reinterpret_cast<const char*>(pheader + 1);
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const char* end = reinterpret_cast<const char*>(pheader) + pheader->size;
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MoveFromBinaryFormat(data, p);
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filename = p;
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p += ALIGN(filename.size() + 1, 8);
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CHECK_LE(p, end);
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sample_id.ReadFromBinaryFormat(attr, p, end);
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}
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std::vector<char> Mmap2Record::BinaryFormat() const {
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std::vector<char> buf(header.size);
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char* p = buf.data();
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MoveToBinaryFormat(header, p);
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MoveToBinaryFormat(data, p);
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strcpy(p, filename.c_str());
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p += ALIGN(filename.size() + 1, 8);
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sample_id.WriteToBinaryFormat(p);
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return buf;
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}
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void Mmap2Record::AdjustSizeBasedOnData() {
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header.size = sizeof(header) + sizeof(data) + ALIGN(filename.size() + 1, 8) + sample_id.Size();
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}
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void Mmap2Record::DumpData(size_t indent) const {
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PrintIndented(indent, "pid %u, tid %u, addr 0x%" PRIx64 ", len 0x%" PRIx64 "\n", data.pid,
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data.tid, data.addr, data.len);
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PrintIndented(indent,
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"pgoff 0x" PRIx64 ", maj %u, min %u, ino %" PRId64 ", ino_generation %" PRIu64 "\n",
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data.pgoff, data.maj, data.min, data.ino, data.ino_generation);
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PrintIndented(indent, "prot %u, flags %u, filenames %s\n", data.prot, data.flags,
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filename.c_str());
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}
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CommRecord::CommRecord(const perf_event_attr& attr, const perf_event_header* pheader)
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: Record(pheader) {
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const char* p = reinterpret_cast<const char*>(pheader + 1);
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const char* end = reinterpret_cast<const char*>(pheader) + pheader->size;
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MoveFromBinaryFormat(data, p);
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comm = p;
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p += ALIGN(strlen(p) + 1, 8);
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CHECK_LE(p, end);
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sample_id.ReadFromBinaryFormat(attr, p, end);
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}
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std::vector<char> CommRecord::BinaryFormat() const {
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std::vector<char> buf(header.size);
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char* p = buf.data();
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MoveToBinaryFormat(header, p);
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MoveToBinaryFormat(data, p);
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strcpy(p, comm.c_str());
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p += ALIGN(comm.size() + 1, 8);
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sample_id.WriteToBinaryFormat(p);
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return buf;
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}
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void CommRecord::DumpData(size_t indent) const {
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PrintIndented(indent, "pid %u, tid %u, comm %s\n", data.pid, data.tid, comm.c_str());
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}
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ExitOrForkRecord::ExitOrForkRecord(const perf_event_attr& attr, const perf_event_header* pheader)
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: Record(pheader) {
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const char* p = reinterpret_cast<const char*>(pheader + 1);
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const char* end = reinterpret_cast<const char*>(pheader) + pheader->size;
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MoveFromBinaryFormat(data, p);
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CHECK_LE(p, end);
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sample_id.ReadFromBinaryFormat(attr, p, end);
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}
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std::vector<char> ExitOrForkRecord::BinaryFormat() const {
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std::vector<char> buf(header.size);
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char* p = buf.data();
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MoveToBinaryFormat(header, p);
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MoveToBinaryFormat(data, p);
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sample_id.WriteToBinaryFormat(p);
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return buf;
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}
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void ExitOrForkRecord::DumpData(size_t indent) const {
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PrintIndented(indent, "pid %u, ppid %u, tid %u, ptid %u\n", data.pid, data.ppid, data.tid,
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data.ptid);
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}
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SampleRecord::SampleRecord(const perf_event_attr& attr, const perf_event_header* pheader)
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: Record(pheader) {
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const char* p = reinterpret_cast<const char*>(pheader + 1);
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const char* end = reinterpret_cast<const char*>(pheader) + pheader->size;
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sample_type = attr.sample_type;
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if (sample_type & PERF_SAMPLE_IP) {
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MoveFromBinaryFormat(ip_data, p);
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}
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if (sample_type & PERF_SAMPLE_TID) {
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MoveFromBinaryFormat(tid_data, p);
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}
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if (sample_type & PERF_SAMPLE_TIME) {
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MoveFromBinaryFormat(time_data, p);
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}
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if (sample_type & PERF_SAMPLE_ADDR) {
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MoveFromBinaryFormat(addr_data, p);
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}
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if (sample_type & PERF_SAMPLE_ID) {
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MoveFromBinaryFormat(id_data, p);
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}
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if (sample_type & PERF_SAMPLE_STREAM_ID) {
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MoveFromBinaryFormat(stream_id_data, p);
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}
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if (sample_type & PERF_SAMPLE_CPU) {
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MoveFromBinaryFormat(cpu_data, p);
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}
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if (sample_type & PERF_SAMPLE_PERIOD) {
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MoveFromBinaryFormat(period_data, p);
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}
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if (sample_type & PERF_SAMPLE_CALLCHAIN) {
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uint64_t nr;
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MoveFromBinaryFormat(nr, p);
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callchain_data.ips.resize(nr);
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MoveFromBinaryFormat(callchain_data.ips.data(), nr, p);
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}
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if (sample_type & PERF_SAMPLE_RAW) {
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uint32_t size;
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MoveFromBinaryFormat(size, p);
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raw_data.data.resize(size);
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MoveFromBinaryFormat(raw_data.data.data(), size, p);
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}
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if (sample_type & PERF_SAMPLE_BRANCH_STACK) {
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uint64_t nr;
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MoveFromBinaryFormat(nr, p);
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branch_stack_data.stack.resize(nr);
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MoveFromBinaryFormat(branch_stack_data.stack.data(), nr, p);
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}
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if (sample_type & PERF_SAMPLE_REGS_USER) {
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MoveFromBinaryFormat(regs_user_data.abi, p);
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if (regs_user_data.abi == 0) {
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regs_user_data.reg_mask = 0;
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} else {
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regs_user_data.reg_mask = attr.sample_regs_user;
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size_t bit_nr = 0;
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for (size_t i = 0; i < 64; ++i) {
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if ((regs_user_data.reg_mask >> i) & 1) {
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bit_nr++;
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}
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}
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regs_user_data.regs.resize(bit_nr);
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MoveFromBinaryFormat(regs_user_data.regs.data(), bit_nr, p);
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}
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}
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if (sample_type & PERF_SAMPLE_STACK_USER) {
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uint64_t size;
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MoveFromBinaryFormat(size, p);
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if (size == 0) {
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stack_user_data.dyn_size = 0;
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} else {
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stack_user_data.data.resize(size);
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MoveFromBinaryFormat(stack_user_data.data.data(), size, p);
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MoveFromBinaryFormat(stack_user_data.dyn_size, p);
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}
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}
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// TODO: Add parsing of other PERF_SAMPLE_*.
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CHECK_LE(p, end);
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if (p < end) {
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LOG(DEBUG) << "Record has " << end - p << " bytes left\n";
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}
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}
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std::vector<char> SampleRecord::BinaryFormat() const {
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std::vector<char> buf(header.size);
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char* p = buf.data();
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MoveToBinaryFormat(header, p);
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if (sample_type & PERF_SAMPLE_IP) {
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MoveToBinaryFormat(ip_data, p);
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}
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if (sample_type & PERF_SAMPLE_TID) {
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MoveToBinaryFormat(tid_data, p);
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}
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if (sample_type & PERF_SAMPLE_TIME) {
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MoveToBinaryFormat(time_data, p);
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}
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if (sample_type & PERF_SAMPLE_ADDR) {
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MoveToBinaryFormat(addr_data, p);
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}
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if (sample_type & PERF_SAMPLE_ID) {
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MoveToBinaryFormat(id_data, p);
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}
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if (sample_type & PERF_SAMPLE_STREAM_ID) {
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MoveToBinaryFormat(stream_id_data, p);
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}
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if (sample_type & PERF_SAMPLE_CPU) {
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MoveToBinaryFormat(cpu_data, p);
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}
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if (sample_type & PERF_SAMPLE_PERIOD) {
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MoveToBinaryFormat(period_data, p);
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}
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if (sample_type & PERF_SAMPLE_CALLCHAIN) {
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uint64_t nr = callchain_data.ips.size();
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MoveToBinaryFormat(nr, p);
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MoveToBinaryFormat(callchain_data.ips.data(), nr, p);
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}
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if (sample_type & PERF_SAMPLE_RAW) {
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uint32_t size = raw_data.data.size();
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MoveToBinaryFormat(size, p);
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MoveToBinaryFormat(raw_data.data.data(), size, p);
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}
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if (sample_type & PERF_SAMPLE_BRANCH_STACK) {
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uint64_t nr = branch_stack_data.stack.size();
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MoveToBinaryFormat(nr, p);
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MoveToBinaryFormat(branch_stack_data.stack.data(), nr, p);
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}
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if (sample_type & PERF_SAMPLE_REGS_USER) {
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MoveToBinaryFormat(regs_user_data.abi, p);
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if (regs_user_data.abi != 0) {
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MoveToBinaryFormat(regs_user_data.regs.data(), regs_user_data.regs.size(), p);
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}
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}
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if (sample_type & PERF_SAMPLE_STACK_USER) {
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uint64_t size = stack_user_data.data.size();
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MoveToBinaryFormat(size, p);
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if (size != 0) {
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MoveToBinaryFormat(stack_user_data.data.data(), size, p);
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MoveToBinaryFormat(stack_user_data.dyn_size, p);
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}
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}
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// If record command does stack unwinding, sample records' size may be decreased.
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// So we can't trust header.size here, and should adjust buffer size based on real need.
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buf.resize(p - buf.data());
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return buf;
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}
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void SampleRecord::AdjustSizeBasedOnData() {
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size_t size = BinaryFormat().size();
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LOG(DEBUG) << "Record (type " << RecordTypeToString(header.type) << ") size is changed from "
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<< header.size << " to " << size;
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header.size = size;
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}
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void SampleRecord::DumpData(size_t indent) const {
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PrintIndented(indent, "sample_type: 0x%" PRIx64 "\n", sample_type);
|
|
if (sample_type & PERF_SAMPLE_IP) {
|
|
PrintIndented(indent, "ip %p\n", reinterpret_cast<void*>(ip_data.ip));
|
|
}
|
|
if (sample_type & PERF_SAMPLE_TID) {
|
|
PrintIndented(indent, "pid %u, tid %u\n", tid_data.pid, tid_data.tid);
|
|
}
|
|
if (sample_type & PERF_SAMPLE_TIME) {
|
|
PrintIndented(indent, "time %" PRId64 "\n", time_data.time);
|
|
}
|
|
if (sample_type & PERF_SAMPLE_ADDR) {
|
|
PrintIndented(indent, "addr %p\n", reinterpret_cast<void*>(addr_data.addr));
|
|
}
|
|
if (sample_type & PERF_SAMPLE_ID) {
|
|
PrintIndented(indent, "id %" PRId64 "\n", id_data.id);
|
|
}
|
|
if (sample_type & PERF_SAMPLE_STREAM_ID) {
|
|
PrintIndented(indent, "stream_id %" PRId64 "\n", stream_id_data.stream_id);
|
|
}
|
|
if (sample_type & PERF_SAMPLE_CPU) {
|
|
PrintIndented(indent, "cpu %u, res %u\n", cpu_data.cpu, cpu_data.res);
|
|
}
|
|
if (sample_type & PERF_SAMPLE_PERIOD) {
|
|
PrintIndented(indent, "period %" PRId64 "\n", period_data.period);
|
|
}
|
|
if (sample_type & PERF_SAMPLE_CALLCHAIN) {
|
|
PrintIndented(indent, "callchain nr=%" PRIu64 "\n", callchain_data.ips.size());
|
|
for (auto& ip : callchain_data.ips) {
|
|
PrintIndented(indent + 1, "0x%" PRIx64 "\n", ip);
|
|
}
|
|
}
|
|
if (sample_type & PERF_SAMPLE_RAW) {
|
|
PrintIndented(indent, "raw size=%zu\n", raw_data.data.size());
|
|
const uint32_t* data = reinterpret_cast<const uint32_t*>(raw_data.data.data());
|
|
size_t size = raw_data.data.size() / sizeof(uint32_t);
|
|
for (size_t i = 0; i < size; ++i) {
|
|
PrintIndented(indent + 1, "0x%08x (%zu)\n", data[i], data[i]);
|
|
}
|
|
}
|
|
if (sample_type & PERF_SAMPLE_BRANCH_STACK) {
|
|
PrintIndented(indent, "branch_stack nr=%" PRIu64 "\n", branch_stack_data.stack.size());
|
|
for (auto& item : branch_stack_data.stack) {
|
|
PrintIndented(indent + 1, "from 0x%" PRIx64 ", to 0x%" PRIx64 ", flags 0x%" PRIx64 "\n",
|
|
item.from, item.to, item.flags);
|
|
}
|
|
}
|
|
if (sample_type & PERF_SAMPLE_REGS_USER) {
|
|
PrintIndented(indent, "user regs: abi=%" PRId64 "\n", regs_user_data.abi);
|
|
for (size_t i = 0, pos = 0; i < 64; ++i) {
|
|
if ((regs_user_data.reg_mask >> i) & 1) {
|
|
PrintIndented(indent + 1, "reg (%s) 0x%016" PRIx64 "\n",
|
|
GetRegName(i, ScopedCurrentArch::GetCurrentArch()).c_str(),
|
|
regs_user_data.regs[pos++]);
|
|
}
|
|
}
|
|
}
|
|
if (sample_type & PERF_SAMPLE_STACK_USER) {
|
|
PrintIndented(indent, "user stack: size %zu dyn_size %" PRIu64 "\n",
|
|
stack_user_data.data.size(), stack_user_data.dyn_size);
|
|
const uint64_t* p = reinterpret_cast<const uint64_t*>(stack_user_data.data.data());
|
|
const uint64_t* end = p + (stack_user_data.data.size() / sizeof(uint64_t));
|
|
while (p < end) {
|
|
PrintIndented(indent + 1, "");
|
|
for (size_t i = 0; i < 4 && p < end; ++i, ++p) {
|
|
printf(" %016" PRIx64, *p);
|
|
}
|
|
printf("\n");
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
uint64_t SampleRecord::Timestamp() const {
|
|
return time_data.time;
|
|
}
|
|
|
|
BuildIdRecord::BuildIdRecord(const perf_event_header* pheader) : Record(pheader) {
|
|
const char* p = reinterpret_cast<const char*>(pheader + 1);
|
|
const char* end = reinterpret_cast<const char*>(pheader) + pheader->size;
|
|
MoveFromBinaryFormat(pid, p);
|
|
build_id = BuildId(p, BUILD_ID_SIZE);
|
|
p += ALIGN(build_id.Size(), 8);
|
|
filename = p;
|
|
p += ALIGN(filename.size() + 1, 64);
|
|
CHECK_EQ(p, end);
|
|
}
|
|
|
|
std::vector<char> BuildIdRecord::BinaryFormat() const {
|
|
std::vector<char> buf(header.size);
|
|
char* p = buf.data();
|
|
MoveToBinaryFormat(header, p);
|
|
MoveToBinaryFormat(pid, p);
|
|
memcpy(p, build_id.Data(), build_id.Size());
|
|
p += ALIGN(build_id.Size(), 8);
|
|
strcpy(p, filename.c_str());
|
|
p += ALIGN(filename.size() + 1, 64);
|
|
return buf;
|
|
}
|
|
|
|
void BuildIdRecord::DumpData(size_t indent) const {
|
|
PrintIndented(indent, "pid %u\n", pid);
|
|
PrintIndented(indent, "build_id %s\n", build_id.ToString().c_str());
|
|
PrintIndented(indent, "filename %s\n", filename.c_str());
|
|
}
|
|
|
|
UnknownRecord::UnknownRecord(const perf_event_header* pheader) : Record(pheader) {
|
|
const char* p = reinterpret_cast<const char*>(pheader + 1);
|
|
const char* end = reinterpret_cast<const char*>(pheader) + pheader->size;
|
|
data.insert(data.end(), p, end);
|
|
}
|
|
|
|
std::vector<char> UnknownRecord::BinaryFormat() const {
|
|
std::vector<char> buf(header.size);
|
|
char* p = buf.data();
|
|
MoveToBinaryFormat(header, p);
|
|
MoveToBinaryFormat(data.data(), data.size(), p);
|
|
return buf;
|
|
}
|
|
|
|
void UnknownRecord::DumpData(size_t) const {
|
|
}
|
|
|
|
static std::unique_ptr<Record> ReadRecordFromBuffer(const perf_event_attr& attr,
|
|
const perf_event_header* pheader) {
|
|
switch (pheader->type) {
|
|
case PERF_RECORD_MMAP:
|
|
return std::unique_ptr<Record>(new MmapRecord(attr, pheader));
|
|
case PERF_RECORD_MMAP2:
|
|
return std::unique_ptr<Record>(new Mmap2Record(attr, pheader));
|
|
case PERF_RECORD_COMM:
|
|
return std::unique_ptr<Record>(new CommRecord(attr, pheader));
|
|
case PERF_RECORD_EXIT:
|
|
return std::unique_ptr<Record>(new ExitRecord(attr, pheader));
|
|
case PERF_RECORD_FORK:
|
|
return std::unique_ptr<Record>(new ForkRecord(attr, pheader));
|
|
case PERF_RECORD_SAMPLE:
|
|
return std::unique_ptr<Record>(new SampleRecord(attr, pheader));
|
|
default:
|
|
return std::unique_ptr<Record>(new UnknownRecord(pheader));
|
|
}
|
|
}
|
|
|
|
std::vector<std::unique_ptr<Record>> ReadRecordsFromBuffer(const perf_event_attr& attr,
|
|
const char* buf, size_t buf_size) {
|
|
std::vector<std::unique_ptr<Record>> result;
|
|
const char* p = buf;
|
|
const char* end = buf + buf_size;
|
|
while (p < end) {
|
|
const perf_event_header* header = reinterpret_cast<const perf_event_header*>(p);
|
|
CHECK_LE(p + header->size, end);
|
|
CHECK_NE(0u, header->size);
|
|
result.push_back(ReadRecordFromBuffer(attr, header));
|
|
p += header->size;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
std::unique_ptr<Record> ReadRecordFromFile(const perf_event_attr& attr, FILE* fp) {
|
|
std::vector<char> buf(sizeof(perf_event_header));
|
|
perf_event_header* header = reinterpret_cast<perf_event_header*>(&buf[0]);
|
|
if (fread(header, sizeof(perf_event_header), 1, fp) != 1) {
|
|
PLOG(ERROR) << "Failed to read record file";
|
|
return nullptr;
|
|
}
|
|
buf.resize(header->size);
|
|
header = reinterpret_cast<perf_event_header*>(&buf[0]);
|
|
if (fread(&buf[sizeof(perf_event_header)], buf.size() - sizeof(perf_event_header), 1, fp) != 1) {
|
|
PLOG(ERROR) << "Failed to read record file";
|
|
return nullptr;
|
|
}
|
|
return ReadRecordFromBuffer(attr, header);
|
|
}
|
|
|
|
MmapRecord CreateMmapRecord(const perf_event_attr& attr, bool in_kernel, uint32_t pid, uint32_t tid,
|
|
uint64_t addr, uint64_t len, uint64_t pgoff,
|
|
const std::string& filename) {
|
|
MmapRecord record;
|
|
record.header.type = PERF_RECORD_MMAP;
|
|
record.header.misc = (in_kernel ? PERF_RECORD_MISC_KERNEL : PERF_RECORD_MISC_USER);
|
|
record.data.pid = pid;
|
|
record.data.tid = tid;
|
|
record.data.addr = addr;
|
|
record.data.len = len;
|
|
record.data.pgoff = pgoff;
|
|
record.filename = filename;
|
|
size_t sample_id_size = record.sample_id.CreateContent(attr);
|
|
record.header.size = sizeof(record.header) + sizeof(record.data) +
|
|
ALIGN(record.filename.size() + 1, 8) + sample_id_size;
|
|
return record;
|
|
}
|
|
|
|
CommRecord CreateCommRecord(const perf_event_attr& attr, uint32_t pid, uint32_t tid,
|
|
const std::string& comm) {
|
|
CommRecord record;
|
|
record.header.type = PERF_RECORD_COMM;
|
|
record.header.misc = 0;
|
|
record.data.pid = pid;
|
|
record.data.tid = tid;
|
|
record.comm = comm;
|
|
size_t sample_id_size = record.sample_id.CreateContent(attr);
|
|
record.header.size = sizeof(record.header) + sizeof(record.data) +
|
|
ALIGN(record.comm.size() + 1, 8) + sample_id_size;
|
|
return record;
|
|
}
|
|
|
|
ForkRecord CreateForkRecord(const perf_event_attr& attr, uint32_t pid, uint32_t tid, uint32_t ppid,
|
|
uint32_t ptid) {
|
|
ForkRecord record;
|
|
record.header.type = PERF_RECORD_FORK;
|
|
record.header.misc = 0;
|
|
record.data.pid = pid;
|
|
record.data.ppid = ppid;
|
|
record.data.tid = tid;
|
|
record.data.ptid = ptid;
|
|
record.data.time = 0;
|
|
size_t sample_id_size = record.sample_id.CreateContent(attr);
|
|
record.header.size = sizeof(record.header) + sizeof(record.data) + sample_id_size;
|
|
return record;
|
|
}
|
|
|
|
BuildIdRecord CreateBuildIdRecord(bool in_kernel, pid_t pid, const BuildId& build_id,
|
|
const std::string& filename) {
|
|
BuildIdRecord record;
|
|
record.header.type = PERF_RECORD_BUILD_ID;
|
|
record.header.misc = (in_kernel ? PERF_RECORD_MISC_KERNEL : PERF_RECORD_MISC_USER);
|
|
record.pid = pid;
|
|
record.build_id = build_id;
|
|
record.filename = filename;
|
|
record.header.size = sizeof(record.header) + sizeof(record.pid) +
|
|
ALIGN(record.build_id.Size(), 8) + ALIGN(filename.size() + 1, 64);
|
|
return record;
|
|
}
|
|
|
|
bool RecordCache::RecordWithSeq::IsHappensBefore(const RecordWithSeq& other) const {
|
|
bool is_sample = (record->header.type == PERF_RECORD_SAMPLE);
|
|
bool is_other_sample = (other.record->header.type == PERF_RECORD_SAMPLE);
|
|
uint64_t time = record->Timestamp();
|
|
uint64_t other_time = other.record->Timestamp();
|
|
// The record with smaller time happens first.
|
|
if (time != other_time) {
|
|
return time < other_time;
|
|
}
|
|
// If happening at the same time, make non-sample records before sample records,
|
|
// because non-sample records may contain useful information to parse sample records.
|
|
if (is_sample != is_other_sample) {
|
|
return is_sample ? false : true;
|
|
}
|
|
// Otherwise, use the same order as they enter the cache.
|
|
return seq < other.seq;
|
|
}
|
|
|
|
bool RecordCache::RecordComparator::operator()(const RecordWithSeq& r1,
|
|
const RecordWithSeq& r2) {
|
|
return r2.IsHappensBefore(r1);
|
|
}
|
|
|
|
RecordCache::RecordCache(const perf_event_attr& attr, size_t min_cache_size,
|
|
uint64_t min_time_diff_in_ns)
|
|
: attr_(attr),
|
|
has_timestamp_(attr.sample_id_all && (attr.sample_type & PERF_SAMPLE_TIME)),
|
|
min_cache_size_(min_cache_size),
|
|
min_time_diff_in_ns_(min_time_diff_in_ns),
|
|
last_time_(0),
|
|
cur_seq_(0),
|
|
queue_(RecordComparator()) {
|
|
}
|
|
|
|
RecordCache::~RecordCache() {
|
|
PopAll();
|
|
}
|
|
|
|
void RecordCache::Push(const char* data, size_t size) {
|
|
std::vector<std::unique_ptr<Record>> records = ReadRecordsFromBuffer(attr_, data, size);
|
|
if (has_timestamp_) {
|
|
for (const auto& r : records) {
|
|
last_time_ = std::max(last_time_, r->Timestamp());
|
|
}
|
|
}
|
|
for (auto& r : records) {
|
|
queue_.push(CreateRecordWithSeq(r.release()));
|
|
}
|
|
}
|
|
|
|
void RecordCache::Push(std::unique_ptr<Record> record) {
|
|
queue_.push(CreateRecordWithSeq(record.release()));
|
|
}
|
|
|
|
std::unique_ptr<Record> RecordCache::Pop() {
|
|
if (queue_.size() < min_cache_size_) {
|
|
return nullptr;
|
|
}
|
|
Record* r = queue_.top().record;
|
|
if (has_timestamp_) {
|
|
if (r->Timestamp() + min_time_diff_in_ns_ > last_time_) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
queue_.pop();
|
|
return std::unique_ptr<Record>(r);
|
|
}
|
|
|
|
std::vector<std::unique_ptr<Record>> RecordCache::PopAll() {
|
|
std::vector<std::unique_ptr<Record>> result;
|
|
while (!queue_.empty()) {
|
|
result.emplace_back(queue_.top().record);
|
|
queue_.pop();
|
|
}
|
|
return result;
|
|
}
|
|
|
|
RecordCache::RecordWithSeq RecordCache::CreateRecordWithSeq(Record *r) {
|
|
RecordWithSeq result;
|
|
result.seq = cur_seq_++;
|
|
result.record = r;
|
|
return result;
|
|
}
|