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1070 lines
31 KiB
1070 lines
31 KiB
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/test/trace_event_analyzer.h"
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#include <math.h>
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#include <algorithm>
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#include <set>
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#include "base/json/json_reader.h"
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#include "base/memory/ptr_util.h"
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#include "base/memory/ref_counted_memory.h"
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#include "base/run_loop.h"
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#include "base/strings/pattern.h"
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#include "base/trace_event/trace_buffer.h"
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#include "base/trace_event/trace_config.h"
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#include "base/trace_event/trace_log.h"
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#include "base/values.h"
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namespace {
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void OnTraceDataCollected(base::OnceClosure quit_closure,
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base::trace_event::TraceResultBuffer* buffer,
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const scoped_refptr<base::RefCountedString>& json,
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bool has_more_events) {
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buffer->AddFragment(json->data());
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if (!has_more_events)
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std::move(quit_closure).Run();
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}
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} // namespace
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namespace trace_analyzer {
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// TraceEvent
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TraceEvent::TraceEvent()
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: thread(0, 0),
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timestamp(0),
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duration(0),
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phase(TRACE_EVENT_PHASE_BEGIN),
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other_event(nullptr) {}
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TraceEvent::TraceEvent(TraceEvent&& other) = default;
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TraceEvent::~TraceEvent() = default;
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TraceEvent& TraceEvent::operator=(TraceEvent&& rhs) = default;
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bool TraceEvent::SetFromJSON(const base::Value* event_value) {
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if (event_value->type() != base::Value::Type::DICTIONARY) {
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LOG(ERROR) << "Value must be Type::DICTIONARY";
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return false;
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}
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const base::DictionaryValue* dictionary =
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static_cast<const base::DictionaryValue*>(event_value);
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std::string phase_str;
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const base::DictionaryValue* args = nullptr;
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if (!dictionary->GetString("ph", &phase_str)) {
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LOG(ERROR) << "ph is missing from TraceEvent JSON";
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return false;
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}
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phase = *phase_str.data();
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bool may_have_duration = (phase == TRACE_EVENT_PHASE_COMPLETE);
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bool require_origin = (phase != TRACE_EVENT_PHASE_METADATA);
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bool require_id = (phase == TRACE_EVENT_PHASE_ASYNC_BEGIN ||
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phase == TRACE_EVENT_PHASE_ASYNC_STEP_INTO ||
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phase == TRACE_EVENT_PHASE_ASYNC_STEP_PAST ||
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phase == TRACE_EVENT_PHASE_MEMORY_DUMP ||
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phase == TRACE_EVENT_PHASE_ENTER_CONTEXT ||
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phase == TRACE_EVENT_PHASE_LEAVE_CONTEXT ||
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phase == TRACE_EVENT_PHASE_CREATE_OBJECT ||
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phase == TRACE_EVENT_PHASE_DELETE_OBJECT ||
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phase == TRACE_EVENT_PHASE_SNAPSHOT_OBJECT ||
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phase == TRACE_EVENT_PHASE_ASYNC_END);
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if (require_origin && !dictionary->GetInteger("pid", &thread.process_id)) {
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LOG(ERROR) << "pid is missing from TraceEvent JSON";
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return false;
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}
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if (require_origin && !dictionary->GetInteger("tid", &thread.thread_id)) {
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LOG(ERROR) << "tid is missing from TraceEvent JSON";
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return false;
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}
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if (require_origin && !dictionary->GetDouble("ts", ×tamp)) {
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LOG(ERROR) << "ts is missing from TraceEvent JSON";
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return false;
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}
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if (may_have_duration) {
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dictionary->GetDouble("dur", &duration);
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}
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if (!dictionary->GetString("cat", &category)) {
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LOG(ERROR) << "cat is missing from TraceEvent JSON";
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return false;
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}
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if (!dictionary->GetString("name", &name)) {
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LOG(ERROR) << "name is missing from TraceEvent JSON";
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return false;
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}
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if (!dictionary->GetDictionary("args", &args)) {
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LOG(ERROR) << "args is missing from TraceEvent JSON";
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return false;
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}
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if (require_id && !dictionary->GetString("id", &id)) {
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LOG(ERROR) << "id is missing from ASYNC_BEGIN/ASYNC_END TraceEvent JSON";
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return false;
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}
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dictionary->GetDouble("tdur", &thread_duration);
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dictionary->GetDouble("tts", &thread_timestamp);
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dictionary->GetString("scope", &scope);
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dictionary->GetString("bind_id", &bind_id);
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dictionary->GetBoolean("flow_out", &flow_out);
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dictionary->GetBoolean("flow_in", &flow_in);
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const base::DictionaryValue* id2;
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if (dictionary->GetDictionary("id2", &id2)) {
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id2->GetString("global", &global_id2);
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id2->GetString("local", &local_id2);
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}
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// For each argument, copy the type and create a trace_analyzer::TraceValue.
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for (base::DictionaryValue::Iterator it(*args); !it.IsAtEnd();
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it.Advance()) {
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std::string str;
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bool boolean = false;
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int int_num = 0;
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double double_num = 0.0;
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if (it.value().GetAsString(&str)) {
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arg_strings[it.key()] = str;
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} else if (it.value().GetAsInteger(&int_num)) {
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arg_numbers[it.key()] = static_cast<double>(int_num);
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} else if (it.value().GetAsBoolean(&boolean)) {
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arg_numbers[it.key()] = static_cast<double>(boolean ? 1 : 0);
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} else if (it.value().GetAsDouble(&double_num)) {
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arg_numbers[it.key()] = double_num;
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}
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// Record all arguments as values.
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arg_values[it.key()] = it.value().CreateDeepCopy();
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}
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return true;
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}
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double TraceEvent::GetAbsTimeToOtherEvent() const {
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return fabs(other_event->timestamp - timestamp);
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}
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bool TraceEvent::GetArgAsString(const std::string& name,
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std::string* arg) const {
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const auto it = arg_strings.find(name);
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if (it != arg_strings.end()) {
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*arg = it->second;
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return true;
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}
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return false;
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}
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bool TraceEvent::GetArgAsNumber(const std::string& name,
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double* arg) const {
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const auto it = arg_numbers.find(name);
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if (it != arg_numbers.end()) {
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*arg = it->second;
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return true;
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}
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return false;
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}
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bool TraceEvent::GetArgAsValue(const std::string& name,
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std::unique_ptr<base::Value>* arg) const {
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const auto it = arg_values.find(name);
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if (it != arg_values.end()) {
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*arg = it->second->CreateDeepCopy();
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return true;
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}
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return false;
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}
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bool TraceEvent::HasStringArg(const std::string& name) const {
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return (arg_strings.find(name) != arg_strings.end());
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}
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bool TraceEvent::HasNumberArg(const std::string& name) const {
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return (arg_numbers.find(name) != arg_numbers.end());
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}
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bool TraceEvent::HasArg(const std::string& name) const {
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return (arg_values.find(name) != arg_values.end());
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}
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std::string TraceEvent::GetKnownArgAsString(const std::string& name) const {
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std::string arg_string;
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bool result = GetArgAsString(name, &arg_string);
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DCHECK(result);
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return arg_string;
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}
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double TraceEvent::GetKnownArgAsDouble(const std::string& name) const {
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double arg_double = 0;
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bool result = GetArgAsNumber(name, &arg_double);
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DCHECK(result);
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return arg_double;
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}
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int TraceEvent::GetKnownArgAsInt(const std::string& name) const {
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double arg_double = 0;
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bool result = GetArgAsNumber(name, &arg_double);
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DCHECK(result);
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return static_cast<int>(arg_double);
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}
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bool TraceEvent::GetKnownArgAsBool(const std::string& name) const {
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double arg_double = 0;
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bool result = GetArgAsNumber(name, &arg_double);
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DCHECK(result);
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return (arg_double != 0.0);
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}
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std::unique_ptr<base::Value> TraceEvent::GetKnownArgAsValue(
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const std::string& name) const {
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std::unique_ptr<base::Value> arg_value;
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bool result = GetArgAsValue(name, &arg_value);
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DCHECK(result);
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return arg_value;
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}
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// QueryNode
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QueryNode::QueryNode(const Query& query) : query_(query) {
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}
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QueryNode::~QueryNode() = default;
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// Query
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Query::Query(TraceEventMember member)
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: type_(QUERY_EVENT_MEMBER),
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operator_(OP_INVALID),
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member_(member),
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number_(0),
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is_pattern_(false) {
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}
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Query::Query(TraceEventMember member, const std::string& arg_name)
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: type_(QUERY_EVENT_MEMBER),
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operator_(OP_INVALID),
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member_(member),
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number_(0),
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string_(arg_name),
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is_pattern_(false) {
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}
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Query::Query(const Query& query) = default;
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Query::~Query() = default;
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Query Query::String(const std::string& str) {
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return Query(str);
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}
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Query Query::Double(double num) {
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return Query(num);
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}
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Query Query::Int(int32_t num) {
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return Query(static_cast<double>(num));
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}
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Query Query::Uint(uint32_t num) {
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return Query(static_cast<double>(num));
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}
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Query Query::Bool(bool boolean) {
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return Query(boolean ? 1.0 : 0.0);
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}
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Query Query::Phase(char phase) {
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return Query(static_cast<double>(phase));
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}
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Query Query::Pattern(const std::string& pattern) {
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Query query(pattern);
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query.is_pattern_ = true;
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return query;
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}
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bool Query::Evaluate(const TraceEvent& event) const {
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// First check for values that can convert to bool.
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// double is true if != 0:
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double bool_value = 0.0;
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bool is_bool = GetAsDouble(event, &bool_value);
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if (is_bool)
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return (bool_value != 0.0);
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// string is true if it is non-empty:
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std::string str_value;
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bool is_str = GetAsString(event, &str_value);
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if (is_str)
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return !str_value.empty();
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DCHECK_EQ(QUERY_BOOLEAN_OPERATOR, type_)
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<< "Invalid query: missing boolean expression";
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DCHECK(left_.get());
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DCHECK(right_.get() || is_unary_operator());
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if (is_comparison_operator()) {
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DCHECK(left().is_value() && right().is_value())
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<< "Invalid query: comparison operator used between event member and "
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"value.";
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bool compare_result = false;
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if (CompareAsDouble(event, &compare_result))
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return compare_result;
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if (CompareAsString(event, &compare_result))
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return compare_result;
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return false;
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}
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// It's a logical operator.
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switch (operator_) {
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case OP_AND:
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return left().Evaluate(event) && right().Evaluate(event);
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case OP_OR:
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return left().Evaluate(event) || right().Evaluate(event);
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case OP_NOT:
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return !left().Evaluate(event);
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default:
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NOTREACHED();
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return false;
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}
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}
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bool Query::CompareAsDouble(const TraceEvent& event, bool* result) const {
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double lhs, rhs;
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if (!left().GetAsDouble(event, &lhs) || !right().GetAsDouble(event, &rhs))
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return false;
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switch (operator_) {
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case OP_EQ:
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*result = (lhs == rhs);
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return true;
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case OP_NE:
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*result = (lhs != rhs);
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return true;
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case OP_LT:
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*result = (lhs < rhs);
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return true;
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case OP_LE:
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*result = (lhs <= rhs);
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return true;
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case OP_GT:
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*result = (lhs > rhs);
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return true;
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case OP_GE:
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*result = (lhs >= rhs);
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return true;
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default:
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NOTREACHED();
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return false;
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}
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}
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bool Query::CompareAsString(const TraceEvent& event, bool* result) const {
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std::string lhs, rhs;
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if (!left().GetAsString(event, &lhs) || !right().GetAsString(event, &rhs))
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return false;
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switch (operator_) {
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case OP_EQ:
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if (right().is_pattern_)
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*result = base::MatchPattern(lhs, rhs);
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else if (left().is_pattern_)
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*result = base::MatchPattern(rhs, lhs);
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else
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*result = (lhs == rhs);
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return true;
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case OP_NE:
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if (right().is_pattern_)
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*result = !base::MatchPattern(lhs, rhs);
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else if (left().is_pattern_)
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*result = !base::MatchPattern(rhs, lhs);
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else
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*result = (lhs != rhs);
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return true;
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case OP_LT:
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*result = (lhs < rhs);
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return true;
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case OP_LE:
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*result = (lhs <= rhs);
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return true;
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case OP_GT:
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*result = (lhs > rhs);
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return true;
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case OP_GE:
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*result = (lhs >= rhs);
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return true;
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default:
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NOTREACHED();
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return false;
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}
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}
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bool Query::EvaluateArithmeticOperator(const TraceEvent& event,
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double* num) const {
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DCHECK_EQ(QUERY_ARITHMETIC_OPERATOR, type_);
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DCHECK(left_.get());
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DCHECK(right_.get() || is_unary_operator());
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double lhs = 0, rhs = 0;
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if (!left().GetAsDouble(event, &lhs))
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return false;
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if (!is_unary_operator() && !right().GetAsDouble(event, &rhs))
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return false;
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switch (operator_) {
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case OP_ADD:
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*num = lhs + rhs;
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return true;
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case OP_SUB:
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*num = lhs - rhs;
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return true;
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case OP_MUL:
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*num = lhs * rhs;
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return true;
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case OP_DIV:
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*num = lhs / rhs;
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return true;
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case OP_MOD:
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*num = static_cast<double>(static_cast<int64_t>(lhs) %
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static_cast<int64_t>(rhs));
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return true;
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case OP_NEGATE:
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*num = -lhs;
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return true;
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default:
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NOTREACHED();
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return false;
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}
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}
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bool Query::GetAsDouble(const TraceEvent& event, double* num) const {
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switch (type_) {
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case QUERY_ARITHMETIC_OPERATOR:
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return EvaluateArithmeticOperator(event, num);
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case QUERY_EVENT_MEMBER:
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return GetMemberValueAsDouble(event, num);
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case QUERY_NUMBER:
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*num = number_;
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return true;
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default:
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return false;
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}
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}
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bool Query::GetAsString(const TraceEvent& event, std::string* str) const {
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switch (type_) {
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case QUERY_EVENT_MEMBER:
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return GetMemberValueAsString(event, str);
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case QUERY_STRING:
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*str = string_;
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return true;
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default:
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return false;
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}
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}
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const TraceEvent* Query::SelectTargetEvent(const TraceEvent* event,
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TraceEventMember member) {
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if (member >= OTHER_FIRST_MEMBER && member <= OTHER_LAST_MEMBER) {
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return event->other_event;
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} else if (member >= PREV_FIRST_MEMBER && member <= PREV_LAST_MEMBER) {
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return event->prev_event;
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} else {
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return event;
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}
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}
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bool Query::GetMemberValueAsDouble(const TraceEvent& event,
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double* num) const {
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DCHECK_EQ(QUERY_EVENT_MEMBER, type_);
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// This could be a request for a member of |event| or a member of |event|'s
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// associated previous or next event. Store the target event in the_event:
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const TraceEvent* the_event = SelectTargetEvent(&event, member_);
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// Request for member of associated event, but there is no associated event.
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if (!the_event)
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return false;
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switch (member_) {
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case EVENT_PID:
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case OTHER_PID:
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case PREV_PID:
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*num = static_cast<double>(the_event->thread.process_id);
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return true;
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case EVENT_TID:
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case OTHER_TID:
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case PREV_TID:
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*num = static_cast<double>(the_event->thread.thread_id);
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return true;
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case EVENT_TIME:
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case OTHER_TIME:
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case PREV_TIME:
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*num = the_event->timestamp;
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return true;
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case EVENT_DURATION:
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if (!the_event->has_other_event())
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return false;
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*num = the_event->GetAbsTimeToOtherEvent();
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return true;
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case EVENT_COMPLETE_DURATION:
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if (the_event->phase != TRACE_EVENT_PHASE_COMPLETE)
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return false;
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*num = the_event->duration;
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return true;
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case EVENT_PHASE:
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case OTHER_PHASE:
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case PREV_PHASE:
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*num = static_cast<double>(the_event->phase);
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return true;
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case EVENT_HAS_STRING_ARG:
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case OTHER_HAS_STRING_ARG:
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case PREV_HAS_STRING_ARG:
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*num = (the_event->HasStringArg(string_) ? 1.0 : 0.0);
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return true;
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case EVENT_HAS_NUMBER_ARG:
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case OTHER_HAS_NUMBER_ARG:
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case PREV_HAS_NUMBER_ARG:
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*num = (the_event->HasNumberArg(string_) ? 1.0 : 0.0);
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return true;
|
|
case EVENT_ARG:
|
|
case OTHER_ARG:
|
|
case PREV_ARG: {
|
|
// Search for the argument name and return its value if found.
|
|
std::map<std::string, double>::const_iterator num_i =
|
|
the_event->arg_numbers.find(string_);
|
|
if (num_i == the_event->arg_numbers.end())
|
|
return false;
|
|
*num = num_i->second;
|
|
return true;
|
|
}
|
|
case EVENT_HAS_OTHER:
|
|
// return 1.0 (true) if the other event exists
|
|
*num = event.other_event ? 1.0 : 0.0;
|
|
return true;
|
|
case EVENT_HAS_PREV:
|
|
*num = event.prev_event ? 1.0 : 0.0;
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool Query::GetMemberValueAsString(const TraceEvent& event,
|
|
std::string* str) const {
|
|
DCHECK_EQ(QUERY_EVENT_MEMBER, type_);
|
|
|
|
// This could be a request for a member of |event| or a member of |event|'s
|
|
// associated previous or next event. Store the target event in the_event:
|
|
const TraceEvent* the_event = SelectTargetEvent(&event, member_);
|
|
|
|
// Request for member of associated event, but there is no associated event.
|
|
if (!the_event)
|
|
return false;
|
|
|
|
switch (member_) {
|
|
case EVENT_CATEGORY:
|
|
case OTHER_CATEGORY:
|
|
case PREV_CATEGORY:
|
|
*str = the_event->category;
|
|
return true;
|
|
case EVENT_NAME:
|
|
case OTHER_NAME:
|
|
case PREV_NAME:
|
|
*str = the_event->name;
|
|
return true;
|
|
case EVENT_ID:
|
|
case OTHER_ID:
|
|
case PREV_ID:
|
|
*str = the_event->id;
|
|
return true;
|
|
case EVENT_ARG:
|
|
case OTHER_ARG:
|
|
case PREV_ARG: {
|
|
// Search for the argument name and return its value if found.
|
|
std::map<std::string, std::string>::const_iterator str_i =
|
|
the_event->arg_strings.find(string_);
|
|
if (str_i == the_event->arg_strings.end())
|
|
return false;
|
|
*str = str_i->second;
|
|
return true;
|
|
}
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
Query::Query(const std::string& str)
|
|
: type_(QUERY_STRING),
|
|
operator_(OP_INVALID),
|
|
member_(EVENT_INVALID),
|
|
number_(0),
|
|
string_(str),
|
|
is_pattern_(false) {
|
|
}
|
|
|
|
Query::Query(double num)
|
|
: type_(QUERY_NUMBER),
|
|
operator_(OP_INVALID),
|
|
member_(EVENT_INVALID),
|
|
number_(num),
|
|
is_pattern_(false) {
|
|
}
|
|
const Query& Query::left() const {
|
|
return left_->query();
|
|
}
|
|
|
|
const Query& Query::right() const {
|
|
return right_->query();
|
|
}
|
|
|
|
Query Query::operator==(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_EQ);
|
|
}
|
|
|
|
Query Query::operator!=(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_NE);
|
|
}
|
|
|
|
Query Query::operator<(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_LT);
|
|
}
|
|
|
|
Query Query::operator<=(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_LE);
|
|
}
|
|
|
|
Query Query::operator>(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_GT);
|
|
}
|
|
|
|
Query Query::operator>=(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_GE);
|
|
}
|
|
|
|
Query Query::operator&&(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_AND);
|
|
}
|
|
|
|
Query Query::operator||(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_OR);
|
|
}
|
|
|
|
Query Query::operator!() const {
|
|
return Query(*this, OP_NOT);
|
|
}
|
|
|
|
Query Query::operator+(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_ADD);
|
|
}
|
|
|
|
Query Query::operator-(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_SUB);
|
|
}
|
|
|
|
Query Query::operator*(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_MUL);
|
|
}
|
|
|
|
Query Query::operator/(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_DIV);
|
|
}
|
|
|
|
Query Query::operator%(const Query& rhs) const {
|
|
return Query(*this, rhs, OP_MOD);
|
|
}
|
|
|
|
Query Query::operator-() const {
|
|
return Query(*this, OP_NEGATE);
|
|
}
|
|
|
|
|
|
Query::Query(const Query& left, const Query& right, Operator binary_op)
|
|
: operator_(binary_op),
|
|
left_(new QueryNode(left)),
|
|
right_(new QueryNode(right)),
|
|
member_(EVENT_INVALID),
|
|
number_(0) {
|
|
type_ = (binary_op < OP_ADD ?
|
|
QUERY_BOOLEAN_OPERATOR : QUERY_ARITHMETIC_OPERATOR);
|
|
}
|
|
|
|
Query::Query(const Query& left, Operator unary_op)
|
|
: operator_(unary_op),
|
|
left_(new QueryNode(left)),
|
|
member_(EVENT_INVALID),
|
|
number_(0) {
|
|
type_ = (unary_op < OP_ADD ?
|
|
QUERY_BOOLEAN_OPERATOR : QUERY_ARITHMETIC_OPERATOR);
|
|
}
|
|
|
|
namespace {
|
|
|
|
// Search |events| for |query| and add matches to |output|.
|
|
size_t FindMatchingEvents(const std::vector<TraceEvent>& events,
|
|
const Query& query,
|
|
TraceEventVector* output,
|
|
bool ignore_metadata_events) {
|
|
for (size_t i = 0; i < events.size(); ++i) {
|
|
if (ignore_metadata_events && events[i].phase == TRACE_EVENT_PHASE_METADATA)
|
|
continue;
|
|
if (query.Evaluate(events[i]))
|
|
output->push_back(&events[i]);
|
|
}
|
|
return output->size();
|
|
}
|
|
|
|
bool ParseEventsFromJson(const std::string& json,
|
|
std::vector<TraceEvent>* output) {
|
|
std::unique_ptr<base::Value> root = base::JSONReader::Read(json);
|
|
|
|
base::ListValue* root_list = nullptr;
|
|
if (!root.get() || !root->GetAsList(&root_list))
|
|
return false;
|
|
|
|
for (size_t i = 0; i < root_list->GetSize(); ++i) {
|
|
base::Value* item = nullptr;
|
|
if (root_list->Get(i, &item)) {
|
|
TraceEvent event;
|
|
if (event.SetFromJSON(item))
|
|
output->push_back(std::move(event));
|
|
else
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
// TraceAnalyzer
|
|
|
|
TraceAnalyzer::TraceAnalyzer()
|
|
: ignore_metadata_events_(false), allow_association_changes_(true) {}
|
|
|
|
TraceAnalyzer::~TraceAnalyzer() = default;
|
|
|
|
// static
|
|
TraceAnalyzer* TraceAnalyzer::Create(const std::string& json_events) {
|
|
std::unique_ptr<TraceAnalyzer> analyzer(new TraceAnalyzer());
|
|
if (analyzer->SetEvents(json_events))
|
|
return analyzer.release();
|
|
return nullptr;
|
|
}
|
|
|
|
bool TraceAnalyzer::SetEvents(const std::string& json_events) {
|
|
raw_events_.clear();
|
|
if (!ParseEventsFromJson(json_events, &raw_events_))
|
|
return false;
|
|
std::stable_sort(raw_events_.begin(), raw_events_.end());
|
|
ParseMetadata();
|
|
return true;
|
|
}
|
|
|
|
void TraceAnalyzer::AssociateBeginEndEvents() {
|
|
using trace_analyzer::Query;
|
|
|
|
Query begin(Query::EventPhaseIs(TRACE_EVENT_PHASE_BEGIN));
|
|
Query end(Query::EventPhaseIs(TRACE_EVENT_PHASE_END));
|
|
Query match(Query::EventName() == Query::OtherName() &&
|
|
Query::EventCategory() == Query::OtherCategory() &&
|
|
Query::EventTid() == Query::OtherTid() &&
|
|
Query::EventPid() == Query::OtherPid());
|
|
|
|
AssociateEvents(begin, end, match);
|
|
}
|
|
|
|
void TraceAnalyzer::AssociateAsyncBeginEndEvents(bool match_pid) {
|
|
using trace_analyzer::Query;
|
|
|
|
Query begin(
|
|
Query::EventPhaseIs(TRACE_EVENT_PHASE_ASYNC_BEGIN) ||
|
|
Query::EventPhaseIs(TRACE_EVENT_PHASE_ASYNC_STEP_INTO) ||
|
|
Query::EventPhaseIs(TRACE_EVENT_PHASE_ASYNC_STEP_PAST));
|
|
Query end(Query::EventPhaseIs(TRACE_EVENT_PHASE_ASYNC_END) ||
|
|
Query::EventPhaseIs(TRACE_EVENT_PHASE_ASYNC_STEP_INTO) ||
|
|
Query::EventPhaseIs(TRACE_EVENT_PHASE_ASYNC_STEP_PAST));
|
|
Query match(Query::EventCategory() == Query::OtherCategory() &&
|
|
Query::EventId() == Query::OtherId());
|
|
|
|
if (match_pid) {
|
|
match = match && Query::EventPid() == Query::OtherPid();
|
|
}
|
|
|
|
AssociateEvents(begin, end, match);
|
|
}
|
|
|
|
void TraceAnalyzer::AssociateEvents(const Query& first,
|
|
const Query& second,
|
|
const Query& match) {
|
|
DCHECK(allow_association_changes_)
|
|
<< "AssociateEvents not allowed after FindEvents";
|
|
|
|
// Search for matching begin/end event pairs. When a matching end is found,
|
|
// it is associated with the begin event.
|
|
std::vector<TraceEvent*> begin_stack;
|
|
for (size_t event_index = 0; event_index < raw_events_.size();
|
|
++event_index) {
|
|
|
|
TraceEvent& this_event = raw_events_[event_index];
|
|
|
|
if (second.Evaluate(this_event)) {
|
|
// Search stack for matching begin, starting from end.
|
|
for (int stack_index = static_cast<int>(begin_stack.size()) - 1;
|
|
stack_index >= 0; --stack_index) {
|
|
TraceEvent& begin_event = *begin_stack[stack_index];
|
|
|
|
// Temporarily set other to test against the match query.
|
|
const TraceEvent* other_backup = begin_event.other_event;
|
|
begin_event.other_event = &this_event;
|
|
if (match.Evaluate(begin_event)) {
|
|
// Found a matching begin/end pair.
|
|
// Set the associated previous event
|
|
this_event.prev_event = &begin_event;
|
|
// Erase the matching begin event index from the stack.
|
|
begin_stack.erase(begin_stack.begin() + stack_index);
|
|
break;
|
|
}
|
|
|
|
// Not a match, restore original other and continue.
|
|
begin_event.other_event = other_backup;
|
|
}
|
|
}
|
|
// Even if this_event is a |second| event that has matched an earlier
|
|
// |first| event, it can still also be a |first| event and be associated
|
|
// with a later |second| event.
|
|
if (first.Evaluate(this_event)) {
|
|
begin_stack.push_back(&this_event);
|
|
}
|
|
}
|
|
}
|
|
|
|
void TraceAnalyzer::MergeAssociatedEventArgs() {
|
|
for (size_t i = 0; i < raw_events_.size(); ++i) {
|
|
// Merge all associated events with the first event.
|
|
const TraceEvent* other = raw_events_[i].other_event;
|
|
// Avoid looping by keeping set of encountered TraceEvents.
|
|
std::set<const TraceEvent*> encounters;
|
|
encounters.insert(&raw_events_[i]);
|
|
while (other && encounters.find(other) == encounters.end()) {
|
|
encounters.insert(other);
|
|
raw_events_[i].arg_numbers.insert(
|
|
other->arg_numbers.begin(),
|
|
other->arg_numbers.end());
|
|
raw_events_[i].arg_strings.insert(
|
|
other->arg_strings.begin(),
|
|
other->arg_strings.end());
|
|
other = other->other_event;
|
|
}
|
|
}
|
|
}
|
|
|
|
size_t TraceAnalyzer::FindEvents(const Query& query, TraceEventVector* output) {
|
|
allow_association_changes_ = false;
|
|
output->clear();
|
|
return FindMatchingEvents(
|
|
raw_events_, query, output, ignore_metadata_events_);
|
|
}
|
|
|
|
const TraceEvent* TraceAnalyzer::FindFirstOf(const Query& query) {
|
|
TraceEventVector output;
|
|
if (FindEvents(query, &output) > 0)
|
|
return output.front();
|
|
return nullptr;
|
|
}
|
|
|
|
const TraceEvent* TraceAnalyzer::FindLastOf(const Query& query) {
|
|
TraceEventVector output;
|
|
if (FindEvents(query, &output) > 0)
|
|
return output.back();
|
|
return nullptr;
|
|
}
|
|
|
|
const std::string& TraceAnalyzer::GetThreadName(
|
|
const TraceEvent::ProcessThreadID& thread) {
|
|
// If thread is not found, just add and return empty string.
|
|
return thread_names_[thread];
|
|
}
|
|
|
|
void TraceAnalyzer::ParseMetadata() {
|
|
for (size_t i = 0; i < raw_events_.size(); ++i) {
|
|
TraceEvent& this_event = raw_events_[i];
|
|
// Check for thread name metadata.
|
|
if (this_event.phase != TRACE_EVENT_PHASE_METADATA ||
|
|
this_event.name != "thread_name")
|
|
continue;
|
|
std::map<std::string, std::string>::const_iterator string_it =
|
|
this_event.arg_strings.find("name");
|
|
if (string_it != this_event.arg_strings.end())
|
|
thread_names_[this_event.thread] = string_it->second;
|
|
}
|
|
}
|
|
|
|
// Utility functions for collecting process-local traces and creating a
|
|
// |TraceAnalyzer| from the result.
|
|
|
|
void Start(const std::string& category_filter_string) {
|
|
DCHECK(!base::trace_event::TraceLog::GetInstance()->IsEnabled());
|
|
base::trace_event::TraceLog::GetInstance()->SetEnabled(
|
|
base::trace_event::TraceConfig(category_filter_string, ""),
|
|
base::trace_event::TraceLog::RECORDING_MODE);
|
|
}
|
|
|
|
std::unique_ptr<TraceAnalyzer> Stop() {
|
|
DCHECK(base::trace_event::TraceLog::GetInstance()->IsEnabled());
|
|
base::trace_event::TraceLog::GetInstance()->SetDisabled();
|
|
|
|
base::trace_event::TraceResultBuffer buffer;
|
|
base::trace_event::TraceResultBuffer::SimpleOutput trace_output;
|
|
buffer.SetOutputCallback(trace_output.GetCallback());
|
|
base::RunLoop run_loop;
|
|
buffer.Start();
|
|
base::trace_event::TraceLog::GetInstance()->Flush(
|
|
base::BindRepeating(&OnTraceDataCollected, run_loop.QuitClosure(),
|
|
base::Unretained(&buffer)));
|
|
run_loop.Run();
|
|
buffer.Finish();
|
|
|
|
return base::WrapUnique(TraceAnalyzer::Create(trace_output.json_output));
|
|
}
|
|
|
|
// TraceEventVector utility functions.
|
|
|
|
bool GetRateStats(const TraceEventVector& events,
|
|
RateStats* stats,
|
|
const RateStatsOptions* options) {
|
|
DCHECK(stats);
|
|
// Need at least 3 events to calculate rate stats.
|
|
const size_t kMinEvents = 3;
|
|
if (events.size() < kMinEvents) {
|
|
LOG(ERROR) << "Not enough events: " << events.size();
|
|
return false;
|
|
}
|
|
|
|
std::vector<double> deltas;
|
|
size_t num_deltas = events.size() - 1;
|
|
for (size_t i = 0; i < num_deltas; ++i) {
|
|
double delta = events.at(i + 1)->timestamp - events.at(i)->timestamp;
|
|
if (delta < 0.0) {
|
|
LOG(ERROR) << "Events are out of order";
|
|
return false;
|
|
}
|
|
deltas.push_back(delta);
|
|
}
|
|
|
|
std::sort(deltas.begin(), deltas.end());
|
|
|
|
if (options) {
|
|
if (options->trim_min + options->trim_max > events.size() - kMinEvents) {
|
|
LOG(ERROR) << "Attempt to trim too many events";
|
|
return false;
|
|
}
|
|
deltas.erase(deltas.begin(), deltas.begin() + options->trim_min);
|
|
deltas.erase(deltas.end() - options->trim_max, deltas.end());
|
|
}
|
|
|
|
num_deltas = deltas.size();
|
|
double delta_sum = 0.0;
|
|
for (size_t i = 0; i < num_deltas; ++i)
|
|
delta_sum += deltas[i];
|
|
|
|
stats->min_us = *std::min_element(deltas.begin(), deltas.end());
|
|
stats->max_us = *std::max_element(deltas.begin(), deltas.end());
|
|
stats->mean_us = delta_sum / static_cast<double>(num_deltas);
|
|
|
|
double sum_mean_offsets_squared = 0.0;
|
|
for (size_t i = 0; i < num_deltas; ++i) {
|
|
double offset = fabs(deltas[i] - stats->mean_us);
|
|
sum_mean_offsets_squared += offset * offset;
|
|
}
|
|
stats->standard_deviation_us =
|
|
sqrt(sum_mean_offsets_squared / static_cast<double>(num_deltas - 1));
|
|
|
|
return true;
|
|
}
|
|
|
|
bool FindFirstOf(const TraceEventVector& events,
|
|
const Query& query,
|
|
size_t position,
|
|
size_t* return_index) {
|
|
DCHECK(return_index);
|
|
for (size_t i = position; i < events.size(); ++i) {
|
|
if (query.Evaluate(*events[i])) {
|
|
*return_index = i;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool FindLastOf(const TraceEventVector& events,
|
|
const Query& query,
|
|
size_t position,
|
|
size_t* return_index) {
|
|
DCHECK(return_index);
|
|
for (size_t i = std::min(position + 1, events.size()); i != 0; --i) {
|
|
if (query.Evaluate(*events[i - 1])) {
|
|
*return_index = i - 1;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool FindClosest(const TraceEventVector& events,
|
|
const Query& query,
|
|
size_t position,
|
|
size_t* return_closest,
|
|
size_t* return_second_closest) {
|
|
DCHECK(return_closest);
|
|
if (events.empty() || position >= events.size())
|
|
return false;
|
|
size_t closest = events.size();
|
|
size_t second_closest = events.size();
|
|
for (size_t i = 0; i < events.size(); ++i) {
|
|
if (!query.Evaluate(*events.at(i)))
|
|
continue;
|
|
if (closest == events.size()) {
|
|
closest = i;
|
|
continue;
|
|
}
|
|
if (fabs(events.at(i)->timestamp - events.at(position)->timestamp) <
|
|
fabs(events.at(closest)->timestamp - events.at(position)->timestamp)) {
|
|
second_closest = closest;
|
|
closest = i;
|
|
} else if (second_closest == events.size()) {
|
|
second_closest = i;
|
|
}
|
|
}
|
|
|
|
if (closest < events.size() &&
|
|
(!return_second_closest || second_closest < events.size())) {
|
|
*return_closest = closest;
|
|
if (return_second_closest)
|
|
*return_second_closest = second_closest;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
size_t CountMatches(const TraceEventVector& events,
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const Query& query,
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size_t begin_position,
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size_t end_position) {
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if (begin_position >= events.size())
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return 0u;
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end_position = (end_position < events.size()) ? end_position : events.size();
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size_t count = 0u;
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for (size_t i = begin_position; i < end_position; ++i) {
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if (query.Evaluate(*events.at(i)))
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++count;
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}
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return count;
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}
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} // namespace trace_analyzer
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