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| 1 // Copyright (c) 2010 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 "chrome/plugin/plugin_channel.h" | |
| 6 | |
| 7 #include "base/command_line.h" | |
| 8 #include "base/process_util.h" | |
| 9 #include "base/string_util.h" | |
| 10 #include "base/synchronization/lock.h" | |
| 11 #include "base/synchronization/waitable_event.h" | |
| 12 #include "build/build_config.h" | |
| 13 #include "chrome/plugin/plugin_thread.h" | |
| 14 #include "chrome/plugin/webplugin_delegate_stub.h" | |
| 15 #include "chrome/plugin/webplugin_proxy.h" | |
| 16 #include "content/common/child_process.h" | |
| 17 #include "content/common/content_switches.h" | |
| 18 #include "content/common/plugin_messages.h" | |
| 19 #include "webkit/plugins/npapi/plugin_instance.h" | |
| 20 | |
| 21 #if defined(OS_POSIX) | |
| 22 #include "base/eintr_wrapper.h" | |
| 23 #include "ipc/ipc_channel_posix.h" | |
| 24 #endif | |
| 25 | |
| 26 namespace { | |
| 27 | |
| 28 class PluginReleaseTask : public Task { | |
| 29 public: | |
| 30 void Run() { | |
| 31 ChildProcess::current()->ReleaseProcess(); | |
| 32 } | |
| 33 }; | |
| 34 | |
| 35 // How long we wait before releasing the plugin process. | |
| 36 const int kPluginReleaseTimeMs = 5 * 60 * 1000; // 5 minutes | |
| 37 | |
| 38 } // namespace | |
| 39 | |
| 40 // If a sync call to the renderer results in a modal dialog, we need to have a | |
| 41 // way to know so that we can run a nested message loop to simulate what would | |
| 42 // happen in a single process browser and avoid deadlock. | |
| 43 class PluginChannel::MessageFilter : public IPC::ChannelProxy::MessageFilter { | |
| 44 public: | |
| 45 MessageFilter() : channel_(NULL) { } | |
| 46 ~MessageFilter() { | |
| 47 // Clean up in case of renderer crash. | |
| 48 for (ModalDialogEventMap::iterator i = modal_dialog_event_map_.begin(); | |
| 49 i != modal_dialog_event_map_.end(); ++i) { | |
| 50 delete i->second.event; | |
| 51 } | |
| 52 } | |
| 53 | |
| 54 base::WaitableEvent* GetModalDialogEvent( | |
| 55 gfx::NativeViewId containing_window) { | |
| 56 base::AutoLock auto_lock(modal_dialog_event_map_lock_); | |
| 57 if (!modal_dialog_event_map_.count(containing_window)) { | |
| 58 NOTREACHED(); | |
| 59 return NULL; | |
| 60 } | |
| 61 | |
| 62 return modal_dialog_event_map_[containing_window].event; | |
| 63 } | |
| 64 | |
| 65 // Decrement the ref count associated with the modal dialog event for the | |
| 66 // given tab. | |
| 67 void ReleaseModalDialogEvent(gfx::NativeViewId containing_window) { | |
| 68 base::AutoLock auto_lock(modal_dialog_event_map_lock_); | |
| 69 if (!modal_dialog_event_map_.count(containing_window)) { | |
| 70 NOTREACHED(); | |
| 71 return; | |
| 72 } | |
| 73 | |
| 74 if (--(modal_dialog_event_map_[containing_window].refcount)) | |
| 75 return; | |
| 76 | |
| 77 // Delete the event when the stack unwinds as it could be in use now. | |
| 78 MessageLoop::current()->DeleteSoon( | |
| 79 FROM_HERE, modal_dialog_event_map_[containing_window].event); | |
| 80 modal_dialog_event_map_.erase(containing_window); | |
| 81 } | |
| 82 | |
| 83 bool Send(IPC::Message* message) { | |
| 84 // Need this function for the IPC_MESSAGE_HANDLER_DELAY_REPLY macro. | |
| 85 return channel_->Send(message); | |
| 86 } | |
| 87 | |
| 88 private: | |
| 89 void OnFilterAdded(IPC::Channel* channel) { channel_ = channel; } | |
| 90 | |
| 91 bool OnMessageReceived(const IPC::Message& message) { | |
| 92 IPC_BEGIN_MESSAGE_MAP(PluginChannel::MessageFilter, message) | |
| 93 IPC_MESSAGE_HANDLER_DELAY_REPLY(PluginMsg_Init, OnInit) | |
| 94 IPC_MESSAGE_HANDLER(PluginMsg_SignalModalDialogEvent, | |
| 95 OnSignalModalDialogEvent) | |
| 96 IPC_MESSAGE_HANDLER(PluginMsg_ResetModalDialogEvent, | |
| 97 OnResetModalDialogEvent) | |
| 98 IPC_END_MESSAGE_MAP() | |
| 99 return message.type() == PluginMsg_SignalModalDialogEvent::ID || | |
| 100 message.type() == PluginMsg_ResetModalDialogEvent::ID; | |
| 101 } | |
| 102 | |
| 103 void OnInit(const PluginMsg_Init_Params& params, IPC::Message* reply_msg) { | |
| 104 base::AutoLock auto_lock(modal_dialog_event_map_lock_); | |
| 105 if (modal_dialog_event_map_.count(params.containing_window)) { | |
| 106 modal_dialog_event_map_[params.containing_window].refcount++; | |
| 107 return; | |
| 108 } | |
| 109 | |
| 110 WaitableEventWrapper wrapper; | |
| 111 wrapper.event = new base::WaitableEvent(true, false); | |
| 112 wrapper.refcount = 1; | |
| 113 modal_dialog_event_map_[params.containing_window] = wrapper; | |
| 114 } | |
| 115 | |
| 116 void OnSignalModalDialogEvent(gfx::NativeViewId containing_window) { | |
| 117 base::AutoLock auto_lock(modal_dialog_event_map_lock_); | |
| 118 if (modal_dialog_event_map_.count(containing_window)) | |
| 119 modal_dialog_event_map_[containing_window].event->Signal(); | |
| 120 } | |
| 121 | |
| 122 void OnResetModalDialogEvent(gfx::NativeViewId containing_window) { | |
| 123 base::AutoLock auto_lock(modal_dialog_event_map_lock_); | |
| 124 if (modal_dialog_event_map_.count(containing_window)) | |
| 125 modal_dialog_event_map_[containing_window].event->Reset(); | |
| 126 } | |
| 127 | |
| 128 struct WaitableEventWrapper { | |
| 129 base::WaitableEvent* event; | |
| 130 int refcount; // There could be multiple plugin instances per tab. | |
| 131 }; | |
| 132 typedef std::map<gfx::NativeViewId, WaitableEventWrapper> ModalDialogEventMap; | |
| 133 ModalDialogEventMap modal_dialog_event_map_; | |
| 134 base::Lock modal_dialog_event_map_lock_; | |
| 135 | |
| 136 IPC::Channel* channel_; | |
| 137 }; | |
| 138 | |
| 139 PluginChannel* PluginChannel::GetPluginChannel(int renderer_id, | |
| 140 MessageLoop* ipc_message_loop) { | |
| 141 // Map renderer ID to a (single) channel to that process. | |
| 142 std::string channel_key = StringPrintf( | |
| 143 "%d.r%d", base::GetCurrentProcId(), renderer_id); | |
| 144 | |
| 145 PluginChannel* channel = | |
| 146 static_cast<PluginChannel*>(PluginChannelBase::GetChannel( | |
| 147 channel_key, | |
| 148 IPC::Channel::MODE_SERVER, | |
| 149 ClassFactory, | |
| 150 ipc_message_loop, | |
| 151 false)); | |
| 152 | |
| 153 if (channel) | |
| 154 channel->renderer_id_ = renderer_id; | |
| 155 | |
| 156 return channel; | |
| 157 } | |
| 158 | |
| 159 // static | |
| 160 void PluginChannel::NotifyRenderersOfPendingShutdown() { | |
| 161 Broadcast(new PluginHostMsg_PluginShuttingDown()); | |
| 162 } | |
| 163 | |
| 164 PluginChannel::PluginChannel() | |
| 165 : renderer_handle_(0), | |
| 166 renderer_id_(-1), | |
| 167 in_send_(0), | |
| 168 incognito_(false), | |
| 169 filter_(new MessageFilter()) { | |
| 170 set_send_unblocking_only_during_unblock_dispatch(); | |
| 171 ChildProcess::current()->AddRefProcess(); | |
| 172 const CommandLine* command_line = CommandLine::ForCurrentProcess(); | |
| 173 log_messages_ = command_line->HasSwitch(switches::kLogPluginMessages); | |
| 174 } | |
| 175 | |
| 176 PluginChannel::~PluginChannel() { | |
| 177 if (renderer_handle_) | |
| 178 base::CloseProcessHandle(renderer_handle_); | |
| 179 | |
| 180 MessageLoop::current()->PostDelayedTask(FROM_HERE, new PluginReleaseTask(), | |
| 181 kPluginReleaseTimeMs); | |
| 182 } | |
| 183 | |
| 184 bool PluginChannel::Send(IPC::Message* msg) { | |
| 185 in_send_++; | |
| 186 if (log_messages_) { | |
| 187 VLOG(1) << "sending message @" << msg << " on channel @" << this | |
| 188 << " with type " << msg->type(); | |
| 189 } | |
| 190 bool result = PluginChannelBase::Send(msg); | |
| 191 in_send_--; | |
| 192 return result; | |
| 193 } | |
| 194 | |
| 195 bool PluginChannel::OnMessageReceived(const IPC::Message& msg) { | |
| 196 if (log_messages_) { | |
| 197 VLOG(1) << "received message @" << &msg << " on channel @" << this | |
| 198 << " with type " << msg.type(); | |
| 199 } | |
| 200 return PluginChannelBase::OnMessageReceived(msg); | |
| 201 } | |
| 202 | |
| 203 bool PluginChannel::OnControlMessageReceived(const IPC::Message& msg) { | |
| 204 bool handled = true; | |
| 205 IPC_BEGIN_MESSAGE_MAP(PluginChannel, msg) | |
| 206 IPC_MESSAGE_HANDLER(PluginMsg_CreateInstance, OnCreateInstance) | |
| 207 IPC_MESSAGE_HANDLER_DELAY_REPLY(PluginMsg_DestroyInstance, | |
| 208 OnDestroyInstance) | |
| 209 IPC_MESSAGE_HANDLER(PluginMsg_GenerateRouteID, OnGenerateRouteID) | |
| 210 IPC_MESSAGE_HANDLER(PluginMsg_ClearSiteData, OnClearSiteData) | |
| 211 IPC_MESSAGE_UNHANDLED(handled = false) | |
| 212 IPC_END_MESSAGE_MAP() | |
| 213 DCHECK(handled); | |
| 214 return handled; | |
| 215 } | |
| 216 | |
| 217 void PluginChannel::OnCreateInstance(const std::string& mime_type, | |
| 218 int* instance_id) { | |
| 219 *instance_id = GenerateRouteID(); | |
| 220 scoped_refptr<WebPluginDelegateStub> stub(new WebPluginDelegateStub( | |
| 221 mime_type, *instance_id, this)); | |
| 222 AddRoute(*instance_id, stub, NULL); | |
| 223 plugin_stubs_.push_back(stub); | |
| 224 } | |
| 225 | |
| 226 void PluginChannel::OnDestroyInstance(int instance_id, | |
| 227 IPC::Message* reply_msg) { | |
| 228 for (size_t i = 0; i < plugin_stubs_.size(); ++i) { | |
| 229 if (plugin_stubs_[i]->instance_id() == instance_id) { | |
| 230 scoped_refptr<MessageFilter> filter(filter_); | |
| 231 gfx::NativeViewId window = | |
| 232 plugin_stubs_[i]->webplugin()->containing_window(); | |
| 233 plugin_stubs_.erase(plugin_stubs_.begin() + i); | |
| 234 Send(reply_msg); | |
| 235 RemoveRoute(instance_id); | |
| 236 // NOTE: *this* might be deleted as a result of calling RemoveRoute. | |
| 237 // Don't release the modal dialog event right away, but do it after the | |
| 238 // stack unwinds since the plugin can be destroyed later if it's in use | |
| 239 // right now. | |
| 240 MessageLoop::current()->PostNonNestableTask(FROM_HERE, NewRunnableMethod( | |
| 241 filter.get(), &MessageFilter::ReleaseModalDialogEvent, window)); | |
| 242 return; | |
| 243 } | |
| 244 } | |
| 245 | |
| 246 NOTREACHED() << "Couldn't find WebPluginDelegateStub to destroy"; | |
| 247 } | |
| 248 | |
| 249 void PluginChannel::OnGenerateRouteID(int* route_id) { | |
| 250 *route_id = GenerateRouteID(); | |
| 251 } | |
| 252 | |
| 253 int PluginChannel::GenerateRouteID() { | |
| 254 static int last_id = 0; | |
| 255 return ++last_id; | |
| 256 } | |
| 257 | |
| 258 void PluginChannel::OnClearSiteData(const std::string& site, | |
| 259 uint64 flags, | |
| 260 base::Time begin_time) { | |
| 261 bool success = false; | |
| 262 CommandLine* command_line = CommandLine::ForCurrentProcess(); | |
| 263 FilePath path = command_line->GetSwitchValuePath(switches::kPluginPath); | |
| 264 scoped_refptr<webkit::npapi::PluginLib> plugin_lib( | |
| 265 webkit::npapi::PluginLib::CreatePluginLib(path)); | |
| 266 if (plugin_lib.get()) { | |
| 267 NPError err = plugin_lib->NP_Initialize(); | |
| 268 if (err == NPERR_NO_ERROR) { | |
| 269 const char* site_str = site.empty() ? NULL : site.c_str(); | |
| 270 uint64 max_age; | |
| 271 if (begin_time > base::Time()) { | |
| 272 base::TimeDelta delta = base::Time::Now() - begin_time; | |
| 273 max_age = delta.InSeconds(); | |
| 274 } else { | |
| 275 max_age = kuint64max; | |
| 276 } | |
| 277 err = plugin_lib->NP_ClearSiteData(site_str, flags, max_age); | |
| 278 success = (err == NPERR_NO_ERROR); | |
| 279 } | |
| 280 } | |
| 281 Send(new PluginHostMsg_ClearSiteDataResult(success)); | |
| 282 } | |
| 283 | |
| 284 base::WaitableEvent* PluginChannel::GetModalDialogEvent( | |
| 285 gfx::NativeViewId containing_window) { | |
| 286 return filter_->GetModalDialogEvent(containing_window); | |
| 287 } | |
| 288 | |
| 289 void PluginChannel::OnChannelConnected(int32 peer_pid) { | |
| 290 base::ProcessHandle handle; | |
| 291 if (!base::OpenProcessHandle(peer_pid, &handle)) { | |
| 292 NOTREACHED(); | |
| 293 } | |
| 294 renderer_handle_ = handle; | |
| 295 PluginChannelBase::OnChannelConnected(peer_pid); | |
| 296 } | |
| 297 | |
| 298 void PluginChannel::OnChannelError() { | |
| 299 base::CloseProcessHandle(renderer_handle_); | |
| 300 renderer_handle_ = 0; | |
| 301 PluginChannelBase::OnChannelError(); | |
| 302 CleanUp(); | |
| 303 } | |
| 304 | |
| 305 void PluginChannel::CleanUp() { | |
| 306 // We need to clean up the stubs so that they call NPPDestroy. This will | |
| 307 // also lead to them releasing their reference on this object so that it can | |
| 308 // be deleted. | |
| 309 for (size_t i = 0; i < plugin_stubs_.size(); ++i) | |
| 310 RemoveRoute(plugin_stubs_[i]->instance_id()); | |
| 311 | |
| 312 // Need to addref this object temporarily because otherwise removing the last | |
| 313 // stub will cause the destructor of this object to be called, however at | |
| 314 // that point plugin_stubs_ will have one element and its destructor will be | |
| 315 // called twice. | |
| 316 scoped_refptr<PluginChannel> me(this); | |
| 317 | |
| 318 plugin_stubs_.clear(); | |
| 319 } | |
| 320 | |
| 321 bool PluginChannel::Init(MessageLoop* ipc_message_loop, bool create_pipe_now) { | |
| 322 if (!PluginChannelBase::Init(ipc_message_loop, create_pipe_now)) | |
| 323 return false; | |
| 324 | |
| 325 channel_->AddFilter(filter_.get()); | |
| 326 return true; | |
| 327 } | |
| 328 | |
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