| /* |
| * 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. |
| */ |
| |
| #include "record.h" |
| |
| #include <inttypes.h> |
| #include <algorithm> |
| #include <unordered_map> |
| |
| #include <android-base/logging.h> |
| #include <android-base/stringprintf.h> |
| |
| #include "environment.h" |
| #include "perf_regs.h" |
| #include "utils.h" |
| |
| static std::string RecordTypeToString(int record_type) { |
| static std::unordered_map<int, std::string> record_type_names = { |
| {PERF_RECORD_MMAP, "mmap"}, {PERF_RECORD_LOST, "lost"}, |
| {PERF_RECORD_COMM, "comm"}, {PERF_RECORD_EXIT, "exit"}, |
| {PERF_RECORD_THROTTLE, "throttle"}, {PERF_RECORD_UNTHROTTLE, "unthrottle"}, |
| {PERF_RECORD_FORK, "fork"}, {PERF_RECORD_READ, "read"}, |
| {PERF_RECORD_SAMPLE, "sample"}, {PERF_RECORD_BUILD_ID, "build_id"}, |
| {PERF_RECORD_MMAP2, "mmap2"}, |
| }; |
| |
| auto it = record_type_names.find(record_type); |
| if (it != record_type_names.end()) { |
| return it->second; |
| } |
| return android::base::StringPrintf("unknown(%d)", record_type); |
| } |
| |
| template <class T> |
| void MoveFromBinaryFormat(T* data_p, size_t n, const char*& p) { |
| size_t size = n * sizeof(T); |
| memcpy(data_p, p, size); |
| p += size; |
| } |
| |
| template <class T> |
| void MoveToBinaryFormat(const T& data, char*& p) { |
| *reinterpret_cast<T*>(p) = data; |
| p += sizeof(T); |
| } |
| |
| template <class T> |
| void MoveToBinaryFormat(const T* data_p, size_t n, char*& p) { |
| size_t size = n * sizeof(T); |
| memcpy(p, data_p, size); |
| p += size; |
| } |
| |
| SampleId::SampleId() { |
| memset(this, 0, sizeof(SampleId)); |
| } |
| |
| // Return sample_id size in binary format. |
| size_t SampleId::CreateContent(const perf_event_attr& attr) { |
| sample_id_all = attr.sample_id_all; |
| sample_type = attr.sample_type; |
| // Other data are not necessary. TODO: Set missing SampleId data. |
| return Size(); |
| } |
| |
| void SampleId::ReadFromBinaryFormat(const perf_event_attr& attr, const char* p, const char* end) { |
| sample_id_all = attr.sample_id_all; |
| sample_type = attr.sample_type; |
| if (sample_id_all) { |
| if (sample_type & PERF_SAMPLE_TID) { |
| MoveFromBinaryFormat(tid_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_TIME) { |
| MoveFromBinaryFormat(time_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_ID) { |
| MoveFromBinaryFormat(id_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_STREAM_ID) { |
| MoveFromBinaryFormat(stream_id_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_CPU) { |
| MoveFromBinaryFormat(cpu_data, p); |
| } |
| // TODO: Add parsing of PERF_SAMPLE_IDENTIFIER. |
| } |
| CHECK_LE(p, end); |
| if (p < end) { |
| LOG(DEBUG) << "Record SampleId part has " << end - p << " bytes left\n"; |
| } |
| } |
| |
| void SampleId::WriteToBinaryFormat(char*& p) const { |
| if (sample_id_all) { |
| if (sample_type & PERF_SAMPLE_TID) { |
| MoveToBinaryFormat(tid_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_TIME) { |
| MoveToBinaryFormat(time_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_ID) { |
| MoveToBinaryFormat(id_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_STREAM_ID) { |
| MoveToBinaryFormat(stream_id_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_CPU) { |
| MoveToBinaryFormat(cpu_data, p); |
| } |
| } |
| } |
| |
| void SampleId::Dump(size_t indent) const { |
| if (sample_id_all) { |
| if (sample_type & PERF_SAMPLE_TID) { |
| PrintIndented(indent, "sample_id: pid %u, tid %u\n", tid_data.pid, tid_data.tid); |
| } |
| if (sample_type & PERF_SAMPLE_TIME) { |
| PrintIndented(indent, "sample_id: time %" PRId64 "\n", time_data.time); |
| } |
| if (sample_type & PERF_SAMPLE_ID) { |
| PrintIndented(indent, "sample_id: stream_id %" PRId64 "\n", id_data.id); |
| } |
| if (sample_type & PERF_SAMPLE_STREAM_ID) { |
| PrintIndented(indent, "sample_id: stream_id %" PRId64 "\n", stream_id_data.stream_id); |
| } |
| if (sample_type & PERF_SAMPLE_CPU) { |
| PrintIndented(indent, "sample_id: cpu %u, res %u\n", cpu_data.cpu, cpu_data.res); |
| } |
| } |
| } |
| |
| size_t SampleId::Size() const { |
| size_t size = 0; |
| if (sample_id_all) { |
| if (sample_type & PERF_SAMPLE_TID) { |
| size += sizeof(PerfSampleTidType); |
| } |
| if (sample_type & PERF_SAMPLE_TIME) { |
| size += sizeof(PerfSampleTimeType); |
| } |
| if (sample_type & PERF_SAMPLE_ID) { |
| size += sizeof(PerfSampleIdType); |
| } |
| if (sample_type & PERF_SAMPLE_STREAM_ID) { |
| size += sizeof(PerfSampleStreamIdType); |
| } |
| if (sample_type & PERF_SAMPLE_CPU) { |
| size += sizeof(PerfSampleCpuType); |
| } |
| } |
| return size; |
| } |
| |
| Record::Record() { |
| memset(&header, 0, sizeof(header)); |
| } |
| |
| Record::Record(const perf_event_header* pheader) { |
| header = *pheader; |
| } |
| |
| void Record::Dump(size_t indent) const { |
| PrintIndented(indent, "record %s: type %u, misc %u, size %u\n", |
| RecordTypeToString(header.type).c_str(), header.type, header.misc, header.size); |
| DumpData(indent + 1); |
| sample_id.Dump(indent + 1); |
| } |
| |
| uint64_t Record::Timestamp() const { |
| return sample_id.time_data.time; |
| } |
| |
| MmapRecord::MmapRecord(const perf_event_attr& attr, 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(data, p); |
| filename = p; |
| p += ALIGN(filename.size() + 1, 8); |
| CHECK_LE(p, end); |
| sample_id.ReadFromBinaryFormat(attr, p, end); |
| } |
| |
| std::vector<char> MmapRecord::BinaryFormat() const { |
| std::vector<char> buf(header.size); |
| char* p = buf.data(); |
| MoveToBinaryFormat(header, p); |
| MoveToBinaryFormat(data, p); |
| strcpy(p, filename.c_str()); |
| p += ALIGN(filename.size() + 1, 8); |
| sample_id.WriteToBinaryFormat(p); |
| return buf; |
| } |
| |
| void MmapRecord::AdjustSizeBasedOnData() { |
| header.size = sizeof(header) + sizeof(data) + ALIGN(filename.size() + 1, 8) + sample_id.Size(); |
| } |
| |
| void MmapRecord::DumpData(size_t indent) const { |
| PrintIndented(indent, "pid %u, tid %u, addr 0x%" PRIx64 ", len 0x%" PRIx64 "\n", data.pid, |
| data.tid, data.addr, data.len); |
| PrintIndented(indent, "pgoff 0x%" PRIx64 ", filename %s\n", data.pgoff, filename.c_str()); |
| } |
| |
| Mmap2Record::Mmap2Record(const perf_event_attr& attr, 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(data, p); |
| filename = p; |
| p += ALIGN(filename.size() + 1, 8); |
| CHECK_LE(p, end); |
| sample_id.ReadFromBinaryFormat(attr, p, end); |
| } |
| |
| std::vector<char> Mmap2Record::BinaryFormat() const { |
| std::vector<char> buf(header.size); |
| char* p = buf.data(); |
| MoveToBinaryFormat(header, p); |
| MoveToBinaryFormat(data, p); |
| strcpy(p, filename.c_str()); |
| p += ALIGN(filename.size() + 1, 8); |
| sample_id.WriteToBinaryFormat(p); |
| return buf; |
| } |
| |
| void Mmap2Record::AdjustSizeBasedOnData() { |
| header.size = sizeof(header) + sizeof(data) + ALIGN(filename.size() + 1, 8) + sample_id.Size(); |
| } |
| |
| void Mmap2Record::DumpData(size_t indent) const { |
| PrintIndented(indent, "pid %u, tid %u, addr 0x%" PRIx64 ", len 0x%" PRIx64 "\n", data.pid, |
| data.tid, data.addr, data.len); |
| PrintIndented(indent, |
| "pgoff 0x" PRIx64 ", maj %u, min %u, ino %" PRId64 ", ino_generation %" PRIu64 "\n", |
| data.pgoff, data.maj, data.min, data.ino, data.ino_generation); |
| PrintIndented(indent, "prot %u, flags %u, filenames %s\n", data.prot, data.flags, |
| filename.c_str()); |
| } |
| |
| CommRecord::CommRecord(const perf_event_attr& attr, 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(data, p); |
| comm = p; |
| p += ALIGN(strlen(p) + 1, 8); |
| CHECK_LE(p, end); |
| sample_id.ReadFromBinaryFormat(attr, p, end); |
| } |
| |
| std::vector<char> CommRecord::BinaryFormat() const { |
| std::vector<char> buf(header.size); |
| char* p = buf.data(); |
| MoveToBinaryFormat(header, p); |
| MoveToBinaryFormat(data, p); |
| strcpy(p, comm.c_str()); |
| p += ALIGN(comm.size() + 1, 8); |
| sample_id.WriteToBinaryFormat(p); |
| return buf; |
| } |
| |
| void CommRecord::DumpData(size_t indent) const { |
| PrintIndented(indent, "pid %u, tid %u, comm %s\n", data.pid, data.tid, comm.c_str()); |
| } |
| |
| ExitOrForkRecord::ExitOrForkRecord(const perf_event_attr& attr, 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(data, p); |
| CHECK_LE(p, end); |
| sample_id.ReadFromBinaryFormat(attr, p, end); |
| } |
| |
| std::vector<char> ExitOrForkRecord::BinaryFormat() const { |
| std::vector<char> buf(header.size); |
| char* p = buf.data(); |
| MoveToBinaryFormat(header, p); |
| MoveToBinaryFormat(data, p); |
| sample_id.WriteToBinaryFormat(p); |
| return buf; |
| } |
| |
| void ExitOrForkRecord::DumpData(size_t indent) const { |
| PrintIndented(indent, "pid %u, ppid %u, tid %u, ptid %u\n", data.pid, data.ppid, data.tid, |
| data.ptid); |
| } |
| |
| SampleRecord::SampleRecord(const perf_event_attr& attr, 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; |
| sample_type = attr.sample_type; |
| |
| if (sample_type & PERF_SAMPLE_IP) { |
| MoveFromBinaryFormat(ip_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_TID) { |
| MoveFromBinaryFormat(tid_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_TIME) { |
| MoveFromBinaryFormat(time_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_ADDR) { |
| MoveFromBinaryFormat(addr_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_ID) { |
| MoveFromBinaryFormat(id_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_STREAM_ID) { |
| MoveFromBinaryFormat(stream_id_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_CPU) { |
| MoveFromBinaryFormat(cpu_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_PERIOD) { |
| MoveFromBinaryFormat(period_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_CALLCHAIN) { |
| uint64_t nr; |
| MoveFromBinaryFormat(nr, p); |
| callchain_data.ips.resize(nr); |
| MoveFromBinaryFormat(callchain_data.ips.data(), nr, p); |
| } |
| if (sample_type & PERF_SAMPLE_RAW) { |
| uint32_t size; |
| MoveFromBinaryFormat(size, p); |
| raw_data.data.resize(size); |
| MoveFromBinaryFormat(raw_data.data.data(), size, p); |
| } |
| if (sample_type & PERF_SAMPLE_BRANCH_STACK) { |
| uint64_t nr; |
| MoveFromBinaryFormat(nr, p); |
| branch_stack_data.stack.resize(nr); |
| MoveFromBinaryFormat(branch_stack_data.stack.data(), nr, p); |
| } |
| if (sample_type & PERF_SAMPLE_REGS_USER) { |
| MoveFromBinaryFormat(regs_user_data.abi, p); |
| if (regs_user_data.abi == 0) { |
| regs_user_data.reg_mask = 0; |
| } else { |
| regs_user_data.reg_mask = attr.sample_regs_user; |
| size_t bit_nr = 0; |
| for (size_t i = 0; i < 64; ++i) { |
| if ((regs_user_data.reg_mask >> i) & 1) { |
| bit_nr++; |
| } |
| } |
| regs_user_data.regs.resize(bit_nr); |
| MoveFromBinaryFormat(regs_user_data.regs.data(), bit_nr, p); |
| } |
| } |
| if (sample_type & PERF_SAMPLE_STACK_USER) { |
| uint64_t size; |
| MoveFromBinaryFormat(size, p); |
| if (size == 0) { |
| stack_user_data.dyn_size = 0; |
| } else { |
| stack_user_data.data.resize(size); |
| MoveFromBinaryFormat(stack_user_data.data.data(), size, p); |
| MoveFromBinaryFormat(stack_user_data.dyn_size, p); |
| } |
| } |
| // TODO: Add parsing of other PERF_SAMPLE_*. |
| CHECK_LE(p, end); |
| if (p < end) { |
| LOG(DEBUG) << "Record has " << end - p << " bytes left\n"; |
| } |
| } |
| |
| std::vector<char> SampleRecord::BinaryFormat() const { |
| std::vector<char> buf(header.size); |
| char* p = buf.data(); |
| MoveToBinaryFormat(header, p); |
| if (sample_type & PERF_SAMPLE_IP) { |
| MoveToBinaryFormat(ip_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_TID) { |
| MoveToBinaryFormat(tid_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_TIME) { |
| MoveToBinaryFormat(time_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_ADDR) { |
| MoveToBinaryFormat(addr_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_ID) { |
| MoveToBinaryFormat(id_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_STREAM_ID) { |
| MoveToBinaryFormat(stream_id_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_CPU) { |
| MoveToBinaryFormat(cpu_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_PERIOD) { |
| MoveToBinaryFormat(period_data, p); |
| } |
| if (sample_type & PERF_SAMPLE_CALLCHAIN) { |
| uint64_t nr = callchain_data.ips.size(); |
| MoveToBinaryFormat(nr, p); |
| MoveToBinaryFormat(callchain_data.ips.data(), nr, p); |
| } |
| if (sample_type & PERF_SAMPLE_RAW) { |
| uint32_t size = raw_data.data.size(); |
| MoveToBinaryFormat(size, p); |
| MoveToBinaryFormat(raw_data.data.data(), size, p); |
| } |
| if (sample_type & PERF_SAMPLE_BRANCH_STACK) { |
| uint64_t nr = branch_stack_data.stack.size(); |
| MoveToBinaryFormat(nr, p); |
| MoveToBinaryFormat(branch_stack_data.stack.data(), nr, p); |
| } |
| if (sample_type & PERF_SAMPLE_REGS_USER) { |
| MoveToBinaryFormat(regs_user_data.abi, p); |
| if (regs_user_data.abi != 0) { |
| MoveToBinaryFormat(regs_user_data.regs.data(), regs_user_data.regs.size(), p); |
| } |
| } |
| if (sample_type & PERF_SAMPLE_STACK_USER) { |
| uint64_t size = stack_user_data.data.size(); |
| MoveToBinaryFormat(size, p); |
| if (size != 0) { |
| MoveToBinaryFormat(stack_user_data.data.data(), size, p); |
| MoveToBinaryFormat(stack_user_data.dyn_size, p); |
| } |
| } |
| |
| // If record command does stack unwinding, sample records' size may be decreased. |
| // So we can't trust header.size here, and should adjust buffer size based on real need. |
| buf.resize(p - buf.data()); |
| return buf; |
| } |
| |
| void SampleRecord::AdjustSizeBasedOnData() { |
| size_t size = BinaryFormat().size(); |
| LOG(DEBUG) << "Record (type " << RecordTypeToString(header.type) << ") size is changed from " |
| << header.size << " to " << size; |
| header.size = size; |
| } |
| |
| void SampleRecord::DumpData(size_t indent) const { |
| 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()); |
| 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; |
| } |