| /* |
| * Copyright (C) 2018 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 "src/trace_processor/proto_trace_parser.h" |
| |
| #include <string> |
| |
| #include "perfetto/base/logging.h" |
| #include "perfetto/base/string_view.h" |
| #include "perfetto/base/utils.h" |
| #include "perfetto/protozero/proto_decoder.h" |
| #include "src/trace_processor/blob_reader.h" |
| #include "src/trace_processor/process_tracker.h" |
| #include "src/trace_processor/sched_tracker.h" |
| #include "src/trace_processor/trace_processor_context.h" |
| |
| #include "perfetto/trace/trace.pb.h" |
| #include "perfetto/trace/trace_packet.pb.h" |
| |
| namespace perfetto { |
| namespace trace_processor { |
| |
| using protozero::ProtoDecoder; |
| using protozero::proto_utils::kFieldTypeLengthDelimited; |
| |
| namespace { |
| |
| bool FindIntField(ProtoDecoder* decoder, |
| uint32_t field_id, |
| uint64_t* field_value) { |
| for (auto f = decoder->ReadField(); f.id != 0; f = decoder->ReadField()) { |
| if (f.id == field_id) { |
| *field_value = f.int_value; |
| return true; |
| } |
| } |
| return false; |
| } |
| } // namespace |
| |
| ProtoTraceParser::ProtoTraceParser(BlobReader* reader, |
| TraceProcessorContext* context) |
| : reader_(reader), context_(context) {} |
| |
| ProtoTraceParser::~ProtoTraceParser() = default; |
| |
| bool ProtoTraceParser::ParseNextChunk() { |
| if (!buffer_) |
| buffer_.reset(new uint8_t[chunk_size_]); |
| |
| uint32_t read = reader_->Read(offset_, chunk_size_, buffer_.get()); |
| if (read == 0) |
| return false; |
| |
| ProtoDecoder decoder(buffer_.get(), read); |
| for (auto fld = decoder.ReadField(); fld.id != 0; fld = decoder.ReadField()) { |
| if (fld.id != protos::Trace::kPacketFieldNumber) { |
| PERFETTO_ELOG("Non-trace packet field found in root Trace proto"); |
| continue; |
| } |
| ParsePacket(fld.data(), fld.size()); |
| } |
| |
| offset_ += decoder.offset(); |
| return true; |
| } |
| |
| void ProtoTraceParser::ParsePacket(const uint8_t* data, size_t length) { |
| ProtoDecoder decoder(data, length); |
| for (auto fld = decoder.ReadField(); fld.id != 0; fld = decoder.ReadField()) { |
| switch (fld.id) { |
| case protos::TracePacket::kFtraceEventsFieldNumber: |
| ParseFtraceEventBundle(fld.data(), fld.size()); |
| break; |
| case protos::TracePacket::kProcessTreeFieldNumber: |
| ParseProcessTree(fld.data(), fld.size()); |
| break; |
| default: |
| break; |
| } |
| } |
| PERFETTO_DCHECK(decoder.IsEndOfBuffer()); |
| } |
| |
| void ProtoTraceParser::ParseProcessTree(const uint8_t* data, size_t length) { |
| ProtoDecoder decoder(data, length); |
| |
| for (auto fld = decoder.ReadField(); fld.id != 0; fld = decoder.ReadField()) { |
| switch (fld.id) { |
| case protos::ProcessTree::kProcessesFieldNumber: |
| ParseProcess(fld.data(), fld.size()); |
| break; |
| case protos::ProcessTree::kThreadsFieldNumber: |
| ParseThread(fld.data(), fld.size()); |
| break; |
| default: |
| break; |
| } |
| } |
| PERFETTO_DCHECK(decoder.IsEndOfBuffer()); |
| } |
| |
| void ProtoTraceParser::ParseThread(const uint8_t* data, size_t length) { |
| ProtoDecoder decoder(data, length); |
| uint32_t tid = 0; |
| uint32_t tgid = 0; |
| for (auto fld = decoder.ReadField(); fld.id != 0; fld = decoder.ReadField()) { |
| switch (fld.id) { |
| case protos::ProcessTree::Thread::kTidFieldNumber: |
| tid = fld.as_uint32(); |
| break; |
| case protos::ProcessTree::Thread::kTgidFieldNumber: |
| tgid = fld.as_uint32(); |
| break; |
| default: |
| break; |
| } |
| } |
| context_->process_tracker->UpdateThread(tid, tgid); |
| |
| PERFETTO_DCHECK(decoder.IsEndOfBuffer()); |
| } |
| |
| void ProtoTraceParser::ParseProcess(const uint8_t* data, size_t length) { |
| ProtoDecoder decoder(data, length); |
| uint32_t pid = 0; |
| base::StringView process_name; |
| for (auto fld = decoder.ReadField(); fld.id != 0; fld = decoder.ReadField()) { |
| switch (fld.id) { |
| case protos::ProcessTree::Process::kPidFieldNumber: |
| pid = fld.as_uint32(); |
| break; |
| case protos::ProcessTree::Process::kCmdlineFieldNumber: |
| if (process_name.empty()) |
| process_name = fld.as_string(); |
| break; |
| default: |
| break; |
| } |
| } |
| context_->process_tracker->UpdateProcess(pid, process_name); |
| |
| PERFETTO_DCHECK(decoder.IsEndOfBuffer()); |
| } |
| |
| void ProtoTraceParser::ParseFtraceEventBundle(const uint8_t* data, |
| size_t length) { |
| ProtoDecoder decoder(data, length); |
| uint64_t cpu = 0; |
| if (!FindIntField(&decoder, protos::FtraceEventBundle::kCpuFieldNumber, |
| &cpu)) { |
| PERFETTO_ELOG("CPU field not found in FtraceEventBundle"); |
| return; |
| } |
| decoder.Reset(); |
| |
| for (auto fld = decoder.ReadField(); fld.id != 0; fld = decoder.ReadField()) { |
| switch (fld.id) { |
| case protos::FtraceEventBundle::kEventFieldNumber: |
| ParseFtraceEvent(static_cast<uint32_t>(cpu), fld.data(), fld.size()); |
| break; |
| default: |
| break; |
| } |
| } |
| PERFETTO_DCHECK(decoder.IsEndOfBuffer()); |
| } |
| |
| void ProtoTraceParser::ParseFtraceEvent(uint32_t cpu, |
| const uint8_t* data, |
| size_t length) { |
| ProtoDecoder decoder(data, length); |
| uint64_t timestamp = 0; |
| if (!FindIntField(&decoder, protos::FtraceEvent::kTimestampFieldNumber, |
| ×tamp)) { |
| PERFETTO_ELOG("Timestamp field not found in FtraceEvent"); |
| return; |
| } |
| decoder.Reset(); |
| |
| for (auto fld = decoder.ReadField(); fld.id != 0; fld = decoder.ReadField()) { |
| switch (fld.id) { |
| case protos::FtraceEvent::kSchedSwitchFieldNumber: |
| PERFETTO_DCHECK(timestamp > 0); |
| ParseSchedSwitch(cpu, timestamp, fld.data(), fld.size()); |
| break; |
| default: |
| break; |
| } |
| } |
| PERFETTO_DCHECK(decoder.IsEndOfBuffer()); |
| } |
| |
| void ProtoTraceParser::ParseSchedSwitch(uint32_t cpu, |
| uint64_t timestamp, |
| const uint8_t* data, |
| size_t length) { |
| ProtoDecoder decoder(data, length); |
| |
| uint32_t prev_pid = 0; |
| uint32_t prev_state = 0; |
| base::StringView prev_comm; |
| uint32_t next_pid = 0; |
| for (auto fld = decoder.ReadField(); fld.id != 0; fld = decoder.ReadField()) { |
| switch (fld.id) { |
| case protos::SchedSwitchFtraceEvent::kPrevPidFieldNumber: |
| prev_pid = fld.as_uint32(); |
| break; |
| case protos::SchedSwitchFtraceEvent::kPrevStateFieldNumber: |
| prev_state = fld.as_uint32(); |
| break; |
| case protos::SchedSwitchFtraceEvent::kPrevCommFieldNumber: |
| prev_comm = fld.as_string(); |
| break; |
| case protos::SchedSwitchFtraceEvent::kNextPidFieldNumber: |
| next_pid = fld.as_uint32(); |
| break; |
| default: |
| break; |
| } |
| } |
| context_->sched_tracker->PushSchedSwitch(cpu, timestamp, prev_pid, prev_state, |
| prev_comm, next_pid); |
| |
| PERFETTO_DCHECK(decoder.IsEndOfBuffer()); |
| } |
| |
| } // namespace trace_processor |
| } // namespace perfetto |