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