content/worker/worker_thread.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/worker/worker_thread.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/lazy_instance.h"
   9 #include "base/threading/thread_local.h"
  10 #include "content/child/appcache/appcache_dispatcher.h"
  11 #include "content/child/appcache/appcache_frontend_impl.h"
  12 #include "content/child/db_message_filter.h"
  13 #include "content/child/indexed_db/indexed_db_message_filter.h"
  14 #include "content/child/runtime_features.h"
  15 #include "content/child/web_database_observer_impl.h"
  16 #include "content/common/child_process_messages.h"
  17 #include "content/common/worker_messages.h"
  18 #include "content/public/common/content_switches.h"
  19 #include "content/worker/websharedworker_stub.h"
  20 #include "content/worker/worker_webkitplatformsupport_impl.h"
  21 #include "ipc/ipc_sync_channel.h"
  22 #include "third_party/WebKit/public/platform/WebBlobRegistry.h"
  23 #include "third_party/WebKit/public/web/WebDatabase.h"
  24 #include "third_party/WebKit/public/web/WebKit.h"
  25 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  26 #include "v8/include/v8.h"
  27
  28 using blink::WebRuntimeFeatures;
  29
  30 namespace content {
  31
  32 static base::LazyInstance<base::ThreadLocalPointer<WorkerThread> > lazy_tls =
  33     LAZY_INSTANCE_INITIALIZER;
  34
  35 WorkerThread::WorkerThread() {
  36   lazy_tls.Pointer()->Set(this);
  37   webkit_platform_support_.reset(new WorkerWebKitPlatformSupportImpl(
  38       thread_safe_sender(),
  39       sync_message_filter(),
  40       quota_message_filter()));
  41
  42   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
  43   if (command_line.HasSwitch(switches::kJavaScriptFlags)) {
  44     std::string flags(
  45         command_line.GetSwitchValueASCII(switches::kJavaScriptFlags));
  46     v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.size()));
  47   }
  48   SetRuntimeFeaturesDefaultsAndUpdateFromArgs(command_line);
  49
  50   blink::initialize(webkit_platform_support_.get());
  51
  52   appcache_dispatcher_.reset(
  53       new AppCacheDispatcher(this, new AppCacheFrontendImpl()));
  54
  55   db_message_filter_ = new DBMessageFilter();
  56   channel()->AddFilter(db_message_filter_.get());
  57
  58   indexed_db_message_filter_ = new IndexedDBMessageFilter(
  59       thread_safe_sender());
  60   channel()->AddFilter(indexed_db_message_filter_->GetFilter());
  61
  62 }
  63
  64 void WorkerThread::OnShutdown() {
  65   // The worker process is to be shut down gracefully. Ask the browser
  66   // process to shut it down forcefully instead and wait on the message, so that
  67   // there are no races between threads when the process is shutting down.
  68   Send(new WorkerProcessHostMsg_ForceKillWorker());
  69 }
  70
  71 WorkerThread::~WorkerThread() {
  72 }
  73
  74 void WorkerThread::Shutdown() {
  75   ChildThread::Shutdown();
  76
  77   if (webkit_platform_support_) {
  78     webkit_platform_support_->web_database_observer_impl()->
  79         WaitForAllDatabasesToClose();
  80   }
  81
  82   // Shutdown in reverse of the initialization order.
  83   indexed_db_message_filter_ = NULL;
  84
  85   channel()->RemoveFilter(db_message_filter_.get());
  86   db_message_filter_ = NULL;
  87
  88   blink::shutdown();
  89   lazy_tls.Pointer()->Set(NULL);
  90 }
  91
  92 WorkerThread* WorkerThread::current() {
  93   return lazy_tls.Pointer()->Get();
  94 }
  95
  96 bool WorkerThread::OnControlMessageReceived(const IPC::Message& msg) {
  97   // Appcache messages are handled by a delegate.
  98   if (appcache_dispatcher_->OnMessageReceived(msg))
  99     return true;
 100
 101   bool handled = true;
 102   IPC_BEGIN_MESSAGE_MAP(WorkerThread, msg)
 103     IPC_MESSAGE_HANDLER(WorkerProcessMsg_CreateWorker, OnCreateWorker)
 104     IPC_MESSAGE_UNHANDLED(handled = false)
 105   IPC_END_MESSAGE_MAP()
 106   return handled;
 107 }
 108
 109 bool WorkerThread::OnMessageReceived(const IPC::Message& msg) {
 110   bool handled = true;
 111   IPC_BEGIN_MESSAGE_MAP(WorkerThread, msg)
 112     IPC_MESSAGE_HANDLER(ChildProcessMsg_Shutdown, OnShutdown)
 113     IPC_MESSAGE_UNHANDLED(handled = ChildThread::OnMessageReceived(msg))
 114   IPC_END_MESSAGE_MAP()
 115   return handled;
 116 }
 117
 118 void WorkerThread::OnCreateWorker(
 119     const WorkerProcessMsg_CreateWorker_Params& params) {
 120   // WebSharedWorkerStub own themselves.
 121   new WebSharedWorkerStub(
 122       params.url,
 123       params.name,
 124       params.content_security_policy,
 125       params.security_policy_type,
 126       params.pause_on_start,
 127       params.route_id);
 128 }
 129
 130 // The browser process is likely dead. Terminate all workers.
 131 void WorkerThread::OnChannelError() {
 132   set_on_channel_error_called(true);
 133
 134   for (WorkerStubsList::iterator it = worker_stubs_.begin();
 135        it != worker_stubs_.end(); ++it) {
 136     (*it)->OnChannelError();
 137   }
 138 }
 139
 140 void WorkerThread::RemoveWorkerStub(WebSharedWorkerStub* stub) {
 141   worker_stubs_.erase(stub);
 142 }
 143
 144 void WorkerThread::AddWorkerStub(WebSharedWorkerStub* stub) {
 145   worker_stubs_.insert(stub);
 146 }
 147
 148 }  // namespace content