chrome/browser/ui/hung_plugin_tab_helper.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 "chrome/browser/ui/hung_plugin_tab_helper.h"
   6
   7 #include "base/bind.h"
   8 #include "base/files/file_path.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/process/process.h"
  11 #include "base/rand_util.h"
  12 #include "build/build_config.h"
  13 #include "chrome/browser/chrome_notification_types.h"
  14 #include "chrome/browser/infobars/infobar_service.h"
  15 #include "chrome/common/chrome_version_info.h"
  16 #include "chrome/grit/generated_resources.h"
  17 #include "chrome/grit/locale_settings.h"
  18 #include "components/infobars/core/confirm_infobar_delegate.h"
  19 #include "components/infobars/core/infobar.h"
  20 #include "content/public/browser/browser_child_process_host_iterator.h"
  21 #include "content/public/browser/browser_thread.h"
  22 #include "content/public/browser/child_process_data.h"
  23 #include "content/public/browser/notification_details.h"
  24 #include "content/public/browser/notification_service.h"
  25 #include "content/public/browser/plugin_service.h"
  26 #include "content/public/browser/render_process_host.h"
  27 #include "content/public/common/process_type.h"
  28 #include "content/public/common/result_codes.h"
  29 #include "grit/theme_resources.h"
  30 #include "ui/base/l10n/l10n_util.h"
  31
  32 #if defined(OS_WIN)
  33 #include "base/win/scoped_handle.h"
  34 #include "chrome/browser/hang_monitor/hang_crash_dump_win.h"
  35 #endif
  36
  37
  38 namespace {
  39
  40 #if defined(OS_WIN)
  41
  42 // OwnedHandleVector ----------------------------------------------------------
  43
  44 class OwnedHandleVector {
  45  public:
  46   typedef std::vector<HANDLE> Handles;
  47   OwnedHandleVector();
  48   ~OwnedHandleVector();
  49
  50   Handles* data() { return &data_; }
  51
  52  private:
  53   Handles data_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(OwnedHandleVector);
  56 };
  57
  58 OwnedHandleVector::OwnedHandleVector() {
  59 }
  60
  61 OwnedHandleVector::~OwnedHandleVector() {
  62   for (Handles::iterator iter = data_.begin(); iter != data_.end(); ++iter)
  63     ::CloseHandle(*iter);
  64 }
  65
  66
  67 // Helpers --------------------------------------------------------------------
  68
  69 const char kDumpChildProcessesSequenceName[] = "DumpChildProcesses";
  70
  71 void DumpBrowserInBlockingPool() {
  72   CrashDumpForHangDebugging(::GetCurrentProcess());
  73 }
  74
  75 void DumpRenderersInBlockingPool(OwnedHandleVector* renderer_handles) {
  76   for (OwnedHandleVector::Handles::const_iterator iter =
  77            renderer_handles->data()->begin();
  78        iter != renderer_handles->data()->end(); ++iter) {
  79     CrashDumpForHangDebugging(*iter);
  80   }
  81 }
  82
  83 void DumpAndTerminatePluginInBlockingPool(
  84     base::win::ScopedHandle* plugin_handle) {
  85   CrashDumpAndTerminateHungChildProcess(plugin_handle->Get());
  86 }
  87
  88 #endif  // defined(OS_WIN)
  89
  90 // Called on the I/O thread to actually kill the plugin with the given child
  91 // ID. We specifically don't want this to be a member function since if the
  92 // user chooses to kill the plugin, we want to kill it even if they close the
  93 // tab first.
  94 //
  95 // Be careful with the child_id. It's supplied by the renderer which might be
  96 // hacked.
  97 void KillPluginOnIOThread(int child_id) {
  98   content::BrowserChildProcessHostIterator iter(
  99       content::PROCESS_TYPE_PPAPI_PLUGIN);
 100   while (!iter.Done()) {
 101     const content::ChildProcessData& data = iter.GetData();
 102     if (data.id == child_id) {
 103 #if defined(OS_WIN)
 104       HANDLE handle = NULL;
 105       HANDLE current_process = ::GetCurrentProcess();
 106       ::DuplicateHandle(current_process, data.handle, current_process, &handle,
 107                         0, FALSE, DUPLICATE_SAME_ACCESS);
 108       // Run it in blocking pool so that it won't block the I/O thread. Besides,
 109       // we would like to make sure that it happens after dumping renderers.
 110       content::BrowserThread::PostBlockingPoolSequencedTask(
 111           kDumpChildProcessesSequenceName, FROM_HERE,
 112           base::Bind(&DumpAndTerminatePluginInBlockingPool,
 113                      base::Owned(new base::win::ScopedHandle(handle))));
 114 #else
 115       base::Process process =
 116           base::Process::DeprecatedGetProcessFromHandle(data.handle);
 117       process.Terminate(content::RESULT_CODE_HUNG, false);
 118 #endif
 119       break;
 120     }
 121     ++iter;
 122   }
 123   // Ignore the case where we didn't find the plugin, it may have terminated
 124   // before this function could run.
 125 }
 126
 127 }  // namespace
 128
 129
 130 // HungPluginInfoBarDelegate --------------------------------------------------
 131
 132 class HungPluginInfoBarDelegate : public ConfirmInfoBarDelegate {
 133  public:
 134   // Creates a hung plugin infobar and delegate and adds the infobar to
 135   // |infobar_service|.  Returns the infobar if it was successfully added.
 136   static infobars::InfoBar* Create(InfoBarService* infobar_service,
 137                                    HungPluginTabHelper* helper,
 138                                    int plugin_child_id,
 139                                    const base::string16& plugin_name);
 140
 141  private:
 142   HungPluginInfoBarDelegate(HungPluginTabHelper* helper,
 143                             int plugin_child_id,
 144                             const base::string16& plugin_name);
 145   ~HungPluginInfoBarDelegate() override;
 146
 147   // ConfirmInfoBarDelegate:
 148   int GetIconID() const override;
 149   base::string16 GetMessageText() const override;
 150   int GetButtons() const override;
 151   base::string16 GetButtonLabel(InfoBarButton button) const override;
 152   bool Accept() override;
 153
 154   HungPluginTabHelper* helper_;
 155   int plugin_child_id_;
 156
 157   base::string16 message_;
 158   base::string16 button_text_;
 159 };
 160
 161 // static
 162 infobars::InfoBar* HungPluginInfoBarDelegate::Create(
 163     InfoBarService* infobar_service,
 164     HungPluginTabHelper* helper,
 165     int plugin_child_id,
 166     const base::string16& plugin_name) {
 167   return infobar_service->AddInfoBar(infobar_service->CreateConfirmInfoBar(
 168       scoped_ptr<ConfirmInfoBarDelegate>(new HungPluginInfoBarDelegate(
 169           helper, plugin_child_id, plugin_name))));
 170 }
 171
 172 HungPluginInfoBarDelegate::HungPluginInfoBarDelegate(
 173     HungPluginTabHelper* helper,
 174     int plugin_child_id,
 175     const base::string16& plugin_name)
 176     : ConfirmInfoBarDelegate(),
 177       helper_(helper),
 178       plugin_child_id_(plugin_child_id),
 179       message_(l10n_util::GetStringFUTF16(
 180           IDS_BROWSER_HANGMONITOR_PLUGIN_INFOBAR, plugin_name)),
 181       button_text_(l10n_util::GetStringUTF16(
 182           IDS_BROWSER_HANGMONITOR_PLUGIN_INFOBAR_KILLBUTTON)) {
 183 }
 184
 185 HungPluginInfoBarDelegate::~HungPluginInfoBarDelegate() {
 186 }
 187
 188 int HungPluginInfoBarDelegate::GetIconID() const {
 189   return IDR_INFOBAR_PLUGIN_CRASHED;
 190 }
 191
 192 base::string16 HungPluginInfoBarDelegate::GetMessageText() const {
 193   return message_;
 194 }
 195
 196 int HungPluginInfoBarDelegate::GetButtons() const {
 197   return BUTTON_OK;
 198 }
 199
 200 base::string16 HungPluginInfoBarDelegate::GetButtonLabel(
 201     InfoBarButton button) const {
 202   return button_text_;
 203 }
 204
 205 bool HungPluginInfoBarDelegate::Accept() {
 206   helper_->KillPlugin(plugin_child_id_);
 207   return true;
 208 }
 209
 210
 211 // HungPluginTabHelper::PluginState -------------------------------------------
 212
 213 // Per-plugin state (since there could be more than one plugin hung).  The
 214 // integer key is the child process ID of the plugin process.  This maintains
 215 // the state for all plugins on this page that are currently hung, whether or
 216 // not we're currently showing the infobar.
 217 struct HungPluginTabHelper::PluginState {
 218   // Initializes the plugin state to be a hung plugin.
 219   PluginState(const base::FilePath& p, const base::string16& n);
 220   ~PluginState();
 221
 222   base::FilePath path;
 223   base::string16 name;
 224
 225   // Possibly-null if we're not showing an infobar right now.
 226   infobars::InfoBar* infobar;
 227
 228   // Time to delay before re-showing the infobar for a hung plugin. This is
 229   // increased each time the user cancels it.
 230   base::TimeDelta next_reshow_delay;
 231
 232   // Handles calling the helper when the infobar should be re-shown.
 233   base::Timer timer;
 234
 235  private:
 236   // Initial delay in seconds before re-showing the hung plugin message.
 237   static const int kInitialReshowDelaySec;
 238
 239   // Since the scope of the timer manages our callback, this struct should
 240   // not be copied.
 241   DISALLOW_COPY_AND_ASSIGN(PluginState);
 242 };
 243
 244 // static
 245 const int HungPluginTabHelper::PluginState::kInitialReshowDelaySec = 10;
 246
 247 HungPluginTabHelper::PluginState::PluginState(const base::FilePath& p,
 248                                               const base::string16& n)
 249     : path(p),
 250       name(n),
 251       infobar(NULL),
 252       next_reshow_delay(base::TimeDelta::FromSeconds(kInitialReshowDelaySec)),
 253       timer(false, false) {
 254 }
 255
 256 HungPluginTabHelper::PluginState::~PluginState() {
 257 }
 258
 259
 260 // HungPluginTabHelper --------------------------------------------------------
 261
 262 DEFINE_WEB_CONTENTS_USER_DATA_KEY(HungPluginTabHelper);
 263
 264 HungPluginTabHelper::HungPluginTabHelper(content::WebContents* contents)
 265     : content::WebContentsObserver(contents) {
 266   registrar_.Add(this, chrome::NOTIFICATION_TAB_CONTENTS_INFOBAR_REMOVED,
 267                  content::NotificationService::AllSources());
 268 }
 269
 270 HungPluginTabHelper::~HungPluginTabHelper() {
 271 }
 272
 273 void HungPluginTabHelper::PluginCrashed(const base::FilePath& plugin_path,
 274                                         base::ProcessId plugin_pid) {
 275   // TODO(brettw) ideally this would take the child process ID. When we do this
 276   // for NaCl plugins, we'll want to know exactly which process it was since
 277   // the path won't be useful.
 278   InfoBarService* infobar_service =
 279       InfoBarService::FromWebContents(web_contents());
 280   if (!infobar_service)
 281     return;
 282
 283   // For now, just do a brute-force search to see if we have this plugin. Since
 284   // we'll normally have 0 or 1, this is fast.
 285   for (PluginStateMap::iterator i = hung_plugins_.begin();
 286        i != hung_plugins_.end(); ++i) {
 287     if (i->second->path == plugin_path) {
 288       if (i->second->infobar)
 289         infobar_service->RemoveInfoBar(i->second->infobar);
 290       hung_plugins_.erase(i);
 291       break;
 292     }
 293   }
 294 }
 295
 296 void HungPluginTabHelper::PluginHungStatusChanged(
 297     int plugin_child_id,
 298     const base::FilePath& plugin_path,
 299     bool is_hung) {
 300   InfoBarService* infobar_service =
 301       InfoBarService::FromWebContents(web_contents());
 302   if (!infobar_service)
 303     return;
 304
 305   PluginStateMap::iterator found = hung_plugins_.find(plugin_child_id);
 306   if (found != hung_plugins_.end()) {
 307     if (!is_hung) {
 308       // Hung plugin became un-hung, close the infobar and delete our info.
 309       if (found->second->infobar)
 310         infobar_service->RemoveInfoBar(found->second->infobar);
 311       hung_plugins_.erase(found);
 312     }
 313     return;
 314   }
 315
 316   base::string16 plugin_name =
 317       content::PluginService::GetInstance()->GetPluginDisplayNameByPath(
 318           plugin_path);
 319
 320   linked_ptr<PluginState> state(new PluginState(plugin_path, plugin_name));
 321   hung_plugins_[plugin_child_id] = state;
 322   ShowBar(plugin_child_id, state.get());
 323 }
 324
 325 void HungPluginTabHelper::Observe(
 326     int type,
 327     const content::NotificationSource& source,
 328     const content::NotificationDetails& details) {
 329   DCHECK_EQ(chrome::NOTIFICATION_TAB_CONTENTS_INFOBAR_REMOVED, type);
 330   infobars::InfoBar* infobar =
 331       content::Details<infobars::InfoBar::RemovedDetails>(details)->first;
 332   for (PluginStateMap::iterator i = hung_plugins_.begin();
 333        i != hung_plugins_.end(); ++i) {
 334     PluginState* state = i->second.get();
 335     if (state->infobar == infobar) {
 336       state->infobar = NULL;
 337
 338       // Schedule the timer to re-show the infobar if the plugin continues to be
 339       // hung.
 340       state->timer.Start(FROM_HERE, state->next_reshow_delay,
 341           base::Bind(&HungPluginTabHelper::OnReshowTimer,
 342                      base::Unretained(this),
 343                      i->first));
 344
 345       // Next time we do this, delay it twice as long to avoid being annoying.
 346       state->next_reshow_delay *= 2;
 347       return;
 348     }
 349   }
 350 }
 351
 352 void HungPluginTabHelper::KillPlugin(int child_id) {
 353 #if defined(OS_WIN)
 354   // Dump renderers that are sending or receiving pepper messages, in order to
 355   // diagnose inter-process deadlocks.
 356   // Only do that on the Canary channel, for 20% of pepper plugin hangs.
 357   if (base::RandInt(0, 100) < 20) {
 358     chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
 359     if (channel == chrome::VersionInfo::CHANNEL_CANARY) {
 360       scoped_ptr<OwnedHandleVector> renderer_handles(new OwnedHandleVector);
 361       HANDLE current_process = ::GetCurrentProcess();
 362       content::RenderProcessHost::iterator renderer_iter =
 363           content::RenderProcessHost::AllHostsIterator();
 364       for (; !renderer_iter.IsAtEnd(); renderer_iter.Advance()) {
 365         content::RenderProcessHost* host = renderer_iter.GetCurrentValue();
 366         HANDLE handle = NULL;
 367         ::DuplicateHandle(current_process, host->GetHandle(), current_process,
 368                           &handle, 0, FALSE, DUPLICATE_SAME_ACCESS);
 369         renderer_handles->data()->push_back(handle);
 370       }
 371       // If there are a lot of renderer processes, it is likely that we will
 372       // generate too many crash dumps. They might not all be uploaded/recorded
 373       // due to our crash dump uploading restrictions. So we just don't generate
 374       // renderer crash dumps in that case.
 375       if (renderer_handles->data()->size() > 0 &&
 376           renderer_handles->data()->size() < 4) {
 377         content::BrowserThread::PostBlockingPoolSequencedTask(
 378             kDumpChildProcessesSequenceName, FROM_HERE,
 379             base::Bind(&DumpBrowserInBlockingPool));
 380         content::BrowserThread::PostBlockingPoolSequencedTask(
 381             kDumpChildProcessesSequenceName, FROM_HERE,
 382             base::Bind(&DumpRenderersInBlockingPool,
 383                        base::Owned(renderer_handles.release())));
 384       }
 385     }
 386   }
 387 #endif
 388
 389   PluginStateMap::iterator found = hung_plugins_.find(child_id);
 390   DCHECK(found != hung_plugins_.end());
 391
 392   content::BrowserThread::PostTask(content::BrowserThread::IO,
 393                                    FROM_HERE,
 394                                    base::Bind(&KillPluginOnIOThread, child_id));
 395   CloseBar(found->second.get());
 396 }
 397
 398 void HungPluginTabHelper::OnReshowTimer(int child_id) {
 399   // The timer should have been cancelled if the record isn't in our map
 400   // anymore.
 401   PluginStateMap::iterator found = hung_plugins_.find(child_id);
 402   DCHECK(found != hung_plugins_.end());
 403   DCHECK(!found->second->infobar);
 404   ShowBar(child_id, found->second.get());
 405 }
 406
 407 void HungPluginTabHelper::ShowBar(int child_id, PluginState* state) {
 408   InfoBarService* infobar_service =
 409       InfoBarService::FromWebContents(web_contents());
 410   if (!infobar_service)
 411     return;
 412
 413   DCHECK(!state->infobar);
 414   state->infobar = HungPluginInfoBarDelegate::Create(infobar_service, this,
 415                                                      child_id, state->name);
 416 }
 417
 418 void HungPluginTabHelper::CloseBar(PluginState* state) {
 419   InfoBarService* infobar_service =
 420       InfoBarService::FromWebContents(web_contents());
 421   if (infobar_service && state->infobar) {
 422     infobar_service->RemoveInfoBar(state->infobar);
 423     state->infobar = NULL;
 424   }
 425 }