src/third_party/WebKit/Source/core/inspector/InspectorTracingAgent.cpp

   1 //
   2 // Copyright 2014 The Chromium Authors. All rights reserved.
   3 // Use of this source code is governed by a BSD-style license that can be
   4 // found in the LICENSE file.
   5 //
   6
   7 #include "config.h"
   8
   9 #include "core/inspector/InspectorTracingAgent.h"
  10
  11 #include "core/inspector/IdentifiersFactory.h"
  12 #include "core/inspector/InspectorClient.h"
  13 #include "core/inspector/InspectorState.h"
  14 #include "core/inspector/InspectorWorkerAgent.h"
  15 #include "platform/TraceEvent.h"
  16
  17 namespace blink {
  18
  19 namespace TracingAgentState {
  20 const char sessionId[] = "sessionId";
  21 const char tracingStartedFromProtocol[] = "tracingStartedFromProtocol";
  22 const char tracingStarted[] = "tracingStarted";
  23 }
  24
  25 namespace {
  26 const char devtoolsMetadataEventCategory[] = TRACE_DISABLED_BY_DEFAULT("devtools.timeline");
  27 }
  28
  29 InspectorTracingAgent::InspectorTracingAgent(InspectorClient* client, InspectorWorkerAgent* workerAgent)
  30     : InspectorBaseAgent<InspectorTracingAgent>("Tracing")
  31     , m_layerTreeId(0)
  32     , m_client(client)
  33     , m_frontend(0)
  34     , m_workerAgent(workerAgent)
  35 {
  36 }
  37
  38 void InspectorTracingAgent::restore()
  39 {
  40     emitMetadataEvents();
  41 }
  42
  43 void InspectorTracingAgent::start(ErrorString*, const String& categoryFilter, const String&, const double*)
  44 {
  45     m_state->setBoolean(TracingAgentState::tracingStartedFromProtocol, true);
  46     innerStart(categoryFilter, false);
  47 }
  48
  49 void InspectorTracingAgent::end(ErrorString* errorString)
  50 {
  51     m_state->setBoolean(TracingAgentState::tracingStarted, false);
  52     m_consoleTimelines.clear();
  53     notifyTracingStopped();
  54 }
  55
  56 void InspectorTracingAgent::innerStart(const String& categoryFilter, bool fromConsole)
  57 {
  58     m_state->setString(TracingAgentState::sessionId, IdentifiersFactory::createIdentifier());
  59     m_state->setBoolean(TracingAgentState::tracingStarted, true);
  60     m_client->enableTracing(categoryFilter);
  61     emitMetadataEvents();
  62     m_frontend->started(fromConsole, sessionId());
  63 }
  64
  65 String InspectorTracingAgent::sessionId()
  66 {
  67     return m_state->getString(TracingAgentState::sessionId);
  68 }
  69
  70 void InspectorTracingAgent::emitMetadataEvents()
  71 {
  72     if (!m_state->getBoolean(TracingAgentState::tracingStarted))
  73         return;
  74     TRACE_EVENT_INSTANT1(devtoolsMetadataEventCategory, "TracingStartedInPage", "sessionId", sessionId().utf8());
  75     if (m_layerTreeId)
  76         setLayerTreeId(m_layerTreeId);
  77     m_workerAgent->setTracingSessionId(sessionId());
  78 }
  79
  80 void InspectorTracingAgent::setLayerTreeId(int layerTreeId)
  81 {
  82     m_layerTreeId = layerTreeId;
  83     TRACE_EVENT_INSTANT2(devtoolsMetadataEventCategory, "SetLayerTreeId", "sessionId", sessionId().utf8(), "layerTreeId", m_layerTreeId);
  84 }
  85
  86 void InspectorTracingAgent::consoleTimeline(const String& title)
  87 {
  88     m_consoleTimelines.append(title);
  89     if (m_state->getBoolean(TracingAgentState::tracingStarted))
  90         return;
  91     innerStart("-*,disabled-by-default-devtools.timeline", true);
  92 }
  93
  94 void InspectorTracingAgent::consoleTimelineEnd(const String& title)
  95 {
  96     size_t index = m_consoleTimelines.find(title);
  97     if (index == kNotFound)
  98         return;
  99
 100     m_consoleTimelines.remove(index);
 101     if (!m_consoleTimelines.size()
 102         && m_state->getBoolean(TracingAgentState::tracingStarted)
 103         && !m_state->getBoolean(TracingAgentState::tracingStartedFromProtocol))
 104         notifyTracingStopped();
 105     m_state->setBoolean(TracingAgentState::tracingStarted, false);
 106 }
 107
 108 void InspectorTracingAgent::notifyTracingStopped()
 109 {
 110     m_frontend->stopped();
 111     m_workerAgent->setTracingSessionId(String());
 112 }
 113
 114 void InspectorTracingAgent::setFrontend(InspectorFrontend* frontend)
 115 {
 116     m_frontend = frontend->tracing();
 117 }
 118
 119 }