[proof-of-concept] SW thread independent of the main thread

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 37 matching lines @@
 #include "core/workers/WorkerThreadStartupData.h"
 #include "modules/serviceworkers/ServiceWorkerContainerClient.h"
 #include "modules/serviceworkers/ServiceWorkerThread.h"
 #include "platform/Histogram.h"
 #include "platform/SharedBuffer.h"
 #include "platform/heap/Handle.h"
 #include "platform/network/ContentSecurityPolicyParsers.h"
 #include "platform/network/ContentSecurityPolicyResponseHeaders.h"
 #include "platform/network/NetworkUtils.h"
 #include "platform/weborigin/SecurityOrigin.h"
+#include "platform/TraceEvent.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebURLRequest.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerProvider.h"
 #include "public/web/WebConsoleMessage.h"
 #include "public/web/WebDevToolsAgent.h"
 #include "public/web/WebSettings.h"
 #include "public/web/WebView.h"
 #include "public/web/WebWorkerContentSettingsClientProxy.h"
 #include "public/web/modules/serviceworker/WebServiceWorkerContextClient.h"
 #include "public/web/modules/serviceworker/WebServiceWorkerNetworkProvider.h"
@@ skipping 181 matching lines @@
     m_mainFrame->frame()->document()->addConsoleMessage(ConsoleMessage::create(OtherMessageSource, webCoreMessageLevel, message.text, SourceLocation::create(message.url, message.lineNumber, message.columnNumber, nullptr)));
 }
 
 void WebEmbeddedWorkerImpl::postMessageToPageInspector(const String& message)
 {
     m_workerInspectorProxy->dispatchMessageFromWorker(message);
 }
 
 void WebEmbeddedWorkerImpl::postTaskToLoader(const WebTraceLocation& location, std::unique_ptr<ExecutionContextTask> task)
 {
+    TRACE_EVENT0("ServiceWorker", "WebEmbeddedWorkerImpl::postTaskToLoader");
     // TODO(hiroshige,yuryu): Make this not use ExecutionContextTask and
     // consider using m_mainThreadTaskRunners->get(TaskType::Networking)
     // instead.
     m_mainFrame->frame()->document()->postTask(location, std::move(task));
 }
 
 void WebEmbeddedWorkerImpl::postTaskToWorkerGlobalScope(const WebTraceLocation& location, std::unique_ptr<ExecutionContextTask> task)
 {
+    TRACE_EVENT0("ServiceWorker", "WebEmbeddedWorkerImpl::postTaskToWorkerGlobalScope");
+    // LOG(ERROR) << "WebEmbeddedWorkerImpl::postTaskToWorkerGlobalScope";
     if (m_askedToTerminate || !m_workerThread)
         return;
     m_workerThread->postTask(location, std::move(task));
 }
 
 void WebEmbeddedWorkerImpl::prepareShadowPageForLoader()
 {
     // Create 'shadow page', which is never displayed and is used mainly to
     // provide a context for loading on the main thread.
     //
@@ skipping 167 matching lines @@
     m_mainThreadTaskRunners = ParentFrameTaskRunners::create(nullptr);
 
     m_workerGlobalScopeProxy = ServiceWorkerGlobalScopeProxy::create(*this, *document, *m_workerContextClient);
     m_loaderProxy = WorkerLoaderProxy::create(this);
     m_workerThread = ServiceWorkerThread::create(m_loaderProxy, *m_workerGlobalScopeProxy);
     m_workerThread->start(std::move(startupData));
     m_workerInspectorProxy->workerThreadCreated(document, m_workerThread.get(), scriptURL);
 }
 
 } // namespace blink