src/content/app/content_main_runner.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/public/app/content_main_runner.h"
   6
   7 #include <stdlib.h>
   8
   9 #include "base/allocator/allocator_extension.h"
  10 #include "base/at_exit.h"
  11 #include "base/command_line.h"
  12 #include "base/debug/debugger.h"
  13 #include "base/debug/trace_event.h"
  14 #include "base/files/file_path.h"
  15 #include "base/i18n/icu_util.h"
  16 #include "base/lazy_instance.h"
  17 #include "base/logging.h"
  18 #include "base/memory/scoped_ptr.h"
  19 #include "base/memory/scoped_vector.h"
  20 #include "base/metrics/stats_table.h"
  21 #include "base/path_service.h"
  22 #include "base/process/launch.h"
  23 #include "base/process/memory.h"
  24 #include "base/process/process_handle.h"
  25 #include "base/profiler/alternate_timer.h"
  26 #include "base/strings/string_number_conversions.h"
  27 #include "base/strings/string_util.h"
  28 #include "base/strings/stringprintf.h"
  29 #include "content/browser/browser_main.h"
  30 #include "content/common/set_process_title.h"
  31 #include "content/common/url_schemes.h"
  32 #include "content/gpu/in_process_gpu_thread.h"
  33 #include "content/public/app/content_main.h"
  34 #include "content/public/app/content_main_delegate.h"
  35 #include "content/public/app/startup_helper_win.h"
  36 #include "content/public/browser/content_browser_client.h"
  37 #include "content/public/common/content_client.h"
  38 #include "content/public/common/content_constants.h"
  39 #include "content/public/common/content_paths.h"
  40 #include "content/public/common/content_switches.h"
  41 #include "content/public/common/main_function_params.h"
  42 #include "content/public/common/sandbox_init.h"
  43 #include "content/renderer/in_process_renderer_thread.h"
  44 #include "content/utility/in_process_utility_thread.h"
  45 #include "crypto/nss_util.h"
  46 #include "ipc/ipc_descriptors.h"
  47 #include "ipc/ipc_switches.h"
  48 #include "media/base/media.h"
  49 #include "sandbox/win/src/sandbox_types.h"
  50 #include "ui/base/ui_base_paths.h"
  51 #include "ui/base/ui_base_switches.h"
  52
  53 #if defined(OS_ANDROID)
  54 #include "content/public/common/content_descriptors.h"
  55 #endif
  56
  57 #if defined(USE_TCMALLOC)
  58 #include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
  59 #if defined(TYPE_PROFILING)
  60 #include "base/allocator/type_profiler.h"
  61 #include "base/allocator/type_profiler_tcmalloc.h"
  62 #endif
  63 #endif
  64
  65 #if !defined(OS_IOS)
  66 #include "content/app/mojo/mojo_init.h"
  67 #include "content/browser/gpu/gpu_process_host.h"
  68 #include "content/browser/renderer_host/render_process_host_impl.h"
  69 #include "content/browser/utility_process_host_impl.h"
  70 #include "content/public/plugin/content_plugin_client.h"
  71 #include "content/public/renderer/content_renderer_client.h"
  72 #include "content/public/utility/content_utility_client.h"
  73 #endif
  74
  75 #if defined(OS_WIN)
  76 #include <malloc.h>
  77 #include <cstring>
  78
  79 #include "base/strings/string_number_conversions.h"
  80 #include "ui/base/win/atl_module.h"
  81 #include "ui/base/win/dpi_setup.h"
  82 #include "ui/gfx/win/dpi.h"
  83 #elif defined(OS_MACOSX)
  84 #include "base/mac/scoped_nsautorelease_pool.h"
  85 #if !defined(OS_IOS)
  86 #include "base/power_monitor/power_monitor_device_source.h"
  87 #include "content/browser/mach_broker_mac.h"
  88 #include "content/common/sandbox_init_mac.h"
  89 #endif  // !OS_IOS
  90 #endif  // OS_WIN
  91
  92 #if defined(OS_POSIX)
  93 #include <signal.h>
  94
  95 #include "base/posix/global_descriptors.h"
  96 #include "content/public/common/content_descriptors.h"
  97
  98 #if !defined(OS_MACOSX)
  99 #include "content/public/common/zygote_fork_delegate_linux.h"
 100 #endif
 101 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 102 #include "content/zygote/zygote_main.h"
 103 #endif
 104
 105 #endif  // OS_POSIX
 106
 107 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 108 extern "C" {
 109 int tc_set_new_mode(int mode);
 110 }
 111 #endif
 112
 113 namespace content {
 114 extern int GpuMain(const content::MainFunctionParams&);
 115 #if defined(ENABLE_PLUGINS)
 116 #if !defined(OS_LINUX)
 117 extern int PluginMain(const content::MainFunctionParams&);
 118 #endif
 119 extern int PpapiPluginMain(const MainFunctionParams&);
 120 extern int PpapiBrokerMain(const MainFunctionParams&);
 121 #endif
 122 extern int RendererMain(const content::MainFunctionParams&);
 123 extern int UtilityMain(const MainFunctionParams&);
 124 }  // namespace content
 125
 126 namespace content {
 127
 128 base::LazyInstance<ContentBrowserClient>
 129     g_empty_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 130 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 131 base::LazyInstance<ContentPluginClient>
 132     g_empty_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 133 base::LazyInstance<ContentRendererClient>
 134     g_empty_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 135 base::LazyInstance<ContentUtilityClient>
 136     g_empty_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 137 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 138
 139 #if defined(OS_WIN)
 140
 141 #endif  // defined(OS_WIN)
 142
 143 #if defined(OS_POSIX) && !defined(OS_IOS)
 144
 145 // Setup signal-handling state: resanitize most signals, ignore SIGPIPE.
 146 void SetupSignalHandlers() {
 147   // Sanitise our signal handling state. Signals that were ignored by our
 148   // parent will also be ignored by us. We also inherit our parent's sigmask.
 149   sigset_t empty_signal_set;
 150   CHECK(0 == sigemptyset(&empty_signal_set));
 151   CHECK(0 == sigprocmask(SIG_SETMASK, &empty_signal_set, NULL));
 152
 153   struct sigaction sigact;
 154   memset(&sigact, 0, sizeof(sigact));
 155   sigact.sa_handler = SIG_DFL;
 156   static const int signals_to_reset[] =
 157       {SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV,
 158        SIGALRM, SIGTERM, SIGCHLD, SIGBUS, SIGTRAP};  // SIGPIPE is set below.
 159   for (unsigned i = 0; i < arraysize(signals_to_reset); i++) {
 160     CHECK(0 == sigaction(signals_to_reset[i], &sigact, NULL));
 161   }
 162
 163   // Always ignore SIGPIPE.  We check the return value of write().
 164   CHECK(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
 165 }
 166
 167 #endif  // OS_POSIX && !OS_IOS
 168
 169 void CommonSubprocessInit(const std::string& process_type) {
 170 #if defined(OS_WIN)
 171   // HACK: Let Windows know that we have started.  This is needed to suppress
 172   // the IDC_APPSTARTING cursor from being displayed for a prolonged period
 173   // while a subprocess is starting.
 174   PostThreadMessage(GetCurrentThreadId(), WM_NULL, 0, 0);
 175   MSG msg;
 176   PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
 177 #endif
 178 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 179   // Various things break when you're using a locale where the decimal
 180   // separator isn't a period.  See e.g. bugs 22782 and 39964.  For
 181   // all processes except the browser process (where we call system
 182   // APIs that may rely on the correct locale for formatting numbers
 183   // when presenting them to the user), reset the locale for numeric
 184   // formatting.
 185   // Note that this is not correct for plugin processes -- they can
 186   // surface UI -- but it's likely they get this wrong too so why not.
 187   setlocale(LC_NUMERIC, "C");
 188 #endif
 189 }
 190
 191 // Only needed on Windows for creating stats tables.
 192 #if defined(OS_WIN)
 193 static base::ProcessId GetBrowserPid(const base::CommandLine& command_line) {
 194   base::ProcessId browser_pid = base::GetCurrentProcId();
 195   if (command_line.HasSwitch(switches::kProcessChannelID)) {
 196     std::string channel_name =
 197         command_line.GetSwitchValueASCII(switches::kProcessChannelID);
 198
 199     int browser_pid_int;
 200     base::StringToInt(channel_name, &browser_pid_int);
 201     browser_pid = static_cast<base::ProcessId>(browser_pid_int);
 202     DCHECK_NE(browser_pid_int, 0);
 203   }
 204   return browser_pid;
 205 }
 206 #endif
 207
 208 static void InitializeStatsTable(const base::CommandLine& command_line) {
 209   // Initialize the Stats Counters table.  With this initialized,
 210   // the StatsViewer can be utilized to read counters outside of
 211   // Chrome.  These lines can be commented out to effectively turn
 212   // counters 'off'.  The table is created and exists for the life
 213   // of the process.  It is not cleaned up.
 214   if (command_line.HasSwitch(switches::kEnableStatsTable)) {
 215     // NOTIMPLEMENTED: we probably need to shut this down correctly to avoid
 216     // leaking shared memory regions on posix platforms.
 217 #if defined(OS_POSIX)
 218     // Stats table is in the global file descriptors table on Posix.
 219     base::GlobalDescriptors* global_descriptors =
 220         base::GlobalDescriptors::GetInstance();
 221     base::FileDescriptor table_ident;
 222     if (global_descriptors->MaybeGet(kStatsTableSharedMemFd) != -1) {
 223       // Open the shared memory file descriptor passed by the browser process.
 224       table_ident = base::FileDescriptor(
 225           global_descriptors->Get(kStatsTableSharedMemFd), false);
 226     }
 227 #elif defined(OS_WIN)
 228     // Stats table is in a named segment on Windows. Use the PID to make this
 229     // unique on the system.
 230     std::string table_ident =
 231       base::StringPrintf("%s-%u", kStatsFilename,
 232           static_cast<unsigned int>(GetBrowserPid(command_line)));
 233 #endif
 234     base::StatsTable* stats_table =
 235         new base::StatsTable(table_ident, kStatsMaxThreads, kStatsMaxCounters);
 236     base::StatsTable::set_current(stats_table);
 237   }
 238 }
 239
 240 class ContentClientInitializer {
 241  public:
 242   static void Set(const std::string& process_type,
 243                   ContentMainDelegate* delegate) {
 244     ContentClient* content_client = GetContentClient();
 245     if (process_type.empty()) {
 246       if (delegate)
 247         content_client->browser_ = delegate->CreateContentBrowserClient();
 248       if (!content_client->browser_)
 249         content_client->browser_ = &g_empty_content_browser_client.Get();
 250     }
 251
 252 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 253     if (process_type == switches::kPluginProcess ||
 254         process_type == switches::kPpapiPluginProcess) {
 255       if (delegate)
 256         content_client->plugin_ = delegate->CreateContentPluginClient();
 257       if (!content_client->plugin_)
 258         content_client->plugin_ = &g_empty_content_plugin_client.Get();
 259       // Single process not supported in split dll mode.
 260     } else if (process_type == switches::kRendererProcess ||
 261                base::CommandLine::ForCurrentProcess()->HasSwitch(
 262                    switches::kSingleProcess)) {
 263       if (delegate)
 264         content_client->renderer_ = delegate->CreateContentRendererClient();
 265       if (!content_client->renderer_)
 266         content_client->renderer_ = &g_empty_content_renderer_client.Get();
 267     }
 268
 269     if (process_type == switches::kUtilityProcess ||
 270         base::CommandLine::ForCurrentProcess()->HasSwitch(
 271             switches::kSingleProcess)) {
 272       if (delegate)
 273         content_client->utility_ = delegate->CreateContentUtilityClient();
 274       // TODO(scottmg): http://crbug.com/237249 Should be in _child.
 275       if (!content_client->utility_)
 276         content_client->utility_ = &g_empty_content_utility_client.Get();
 277     }
 278 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 279   }
 280 };
 281
 282 // We dispatch to a process-type-specific FooMain() based on a command-line
 283 // flag.  This struct is used to build a table of (flag, main function) pairs.
 284 struct MainFunction {
 285   const char* name;
 286   int (*function)(const MainFunctionParams&);
 287 };
 288
 289 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 290 // On platforms that use the zygote, we have a special subset of
 291 // subprocesses that are launched via the zygote.  This function
 292 // fills in some process-launching bits around ZygoteMain().
 293 // Returns the exit code of the subprocess.
 294 int RunZygote(const MainFunctionParams& main_function_params,
 295               ContentMainDelegate* delegate) {
 296   static const MainFunction kMainFunctions[] = {
 297     { switches::kRendererProcess,    RendererMain },
 298 #if defined(ENABLE_PLUGINS)
 299     { switches::kPpapiPluginProcess, PpapiPluginMain },
 300 #endif
 301     { switches::kUtilityProcess,     UtilityMain },
 302   };
 303
 304   ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
 305   if (delegate) {
 306     delegate->ZygoteStarting(&zygote_fork_delegates);
 307     // Each Renderer we spawn will re-attempt initialization of the media
 308     // libraries, at which point failure will be detected and handled, so
 309     // we do not need to cope with initialization failures here.
 310     base::FilePath media_path;
 311     if (PathService::Get(DIR_MEDIA_LIBS, &media_path))
 312       media::InitializeMediaLibrary(media_path);
 313   }
 314
 315   // This function call can return multiple times, once per fork().
 316   if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
 317     return 1;
 318
 319   if (delegate) delegate->ZygoteForked();
 320
 321   // Zygote::HandleForkRequest may have reallocated the command
 322   // line so update it here with the new version.
 323   const base::CommandLine& command_line =
 324       *base::CommandLine::ForCurrentProcess();
 325   std::string process_type =
 326       command_line.GetSwitchValueASCII(switches::kProcessType);
 327   ContentClientInitializer::Set(process_type, delegate);
 328
 329   // The StatsTable must be initialized in each process; we already
 330   // initialized for the browser process, now we need to initialize
 331   // within the new processes as well.
 332   InitializeStatsTable(command_line);
 333
 334   MainFunctionParams main_params(command_line);
 335   main_params.zygote_child = true;
 336
 337   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 338     if (process_type == kMainFunctions[i].name)
 339       return kMainFunctions[i].function(main_params);
 340   }
 341
 342   if (delegate)
 343     return delegate->RunProcess(process_type, main_params);
 344
 345   NOTREACHED() << "Unknown zygote process type: " << process_type;
 346   return 1;
 347 }
 348 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 349
 350 #if !defined(OS_IOS)
 351 static void RegisterMainThreadFactories() {
 352 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 353   UtilityProcessHostImpl::RegisterUtilityMainThreadFactory(
 354       CreateInProcessUtilityThread);
 355   RenderProcessHostImpl::RegisterRendererMainThreadFactory(
 356       CreateInProcessRendererThread);
 357   GpuProcessHost::RegisterGpuMainThreadFactory(
 358       CreateInProcessGpuThread);
 359 #else
 360   base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
 361   if (command_line.HasSwitch(switches::kSingleProcess)) {
 362     LOG(FATAL) <<
 363         "--single-process is not supported in chrome multiple dll browser.";
 364   }
 365   if (command_line.HasSwitch(switches::kInProcessGPU)) {
 366     LOG(FATAL) <<
 367         "--in-process-gpu is not supported in chrome multiple dll browser.";
 368   }
 369 #endif
 370 }
 371
 372 // Run the FooMain() for a given process type.
 373 // If |process_type| is empty, runs BrowserMain().
 374 // Returns the exit code for this process.
 375 int RunNamedProcessTypeMain(
 376     const std::string& process_type,
 377     const MainFunctionParams& main_function_params,
 378     ContentMainDelegate* delegate) {
 379   static const MainFunction kMainFunctions[] = {
 380 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 381     { "",                            BrowserMain },
 382 #endif
 383 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 384 #if defined(ENABLE_PLUGINS)
 385 #if !defined(OS_LINUX)
 386     { switches::kPluginProcess,      PluginMain },
 387 #endif
 388     { switches::kPpapiPluginProcess, PpapiPluginMain },
 389     { switches::kPpapiBrokerProcess, PpapiBrokerMain },
 390 #endif  // ENABLE_PLUGINS
 391     { switches::kUtilityProcess,     UtilityMain },
 392     { switches::kRendererProcess,    RendererMain },
 393     { switches::kGpuProcess,         GpuMain },
 394 #endif  // !CHROME_MULTIPLE_DLL_BROWSER
 395   };
 396
 397   RegisterMainThreadFactories();
 398
 399   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 400     if (process_type == kMainFunctions[i].name) {
 401       if (delegate) {
 402         int exit_code = delegate->RunProcess(process_type,
 403             main_function_params);
 404 #if defined(OS_ANDROID)
 405         // In Android's browser process, the negative exit code doesn't mean the
 406         // default behavior should be used as the UI message loop is managed by
 407         // the Java and the browser process's default behavior is always
 408         // overridden.
 409         if (process_type.empty())
 410           return exit_code;
 411 #endif
 412         if (exit_code >= 0)
 413           return exit_code;
 414       }
 415       return kMainFunctions[i].function(main_function_params);
 416     }
 417   }
 418
 419 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 420   // Zygote startup is special -- see RunZygote comments above
 421   // for why we don't use ZygoteMain directly.
 422   if (process_type == switches::kZygoteProcess)
 423     return RunZygote(main_function_params, delegate);
 424 #endif
 425
 426   // If it's a process we don't know about, the embedder should know.
 427   if (delegate)
 428     return delegate->RunProcess(process_type, main_function_params);
 429
 430   NOTREACHED() << "Unknown process type: " << process_type;
 431   return 1;
 432 }
 433 #endif  // !OS_IOS
 434
 435 class ContentMainRunnerImpl : public ContentMainRunner {
 436  public:
 437   ContentMainRunnerImpl()
 438       : is_initialized_(false),
 439         is_shutdown_(false),
 440         completed_basic_startup_(false),
 441         delegate_(NULL),
 442         ui_task_(NULL) {
 443 #if defined(OS_WIN)
 444     memset(&sandbox_info_, 0, sizeof(sandbox_info_));
 445 #endif
 446   }
 447
 448   virtual ~ContentMainRunnerImpl() {
 449     if (is_initialized_ && !is_shutdown_)
 450       Shutdown();
 451   }
 452
 453 #if defined(USE_TCMALLOC)
 454   static bool GetAllocatorWasteSizeThunk(size_t* size) {
 455     size_t heap_size, allocated_bytes, unmapped_bytes;
 456     MallocExtension* ext = MallocExtension::instance();
 457     if (ext->GetNumericProperty("generic.heap_size", &heap_size) &&
 458         ext->GetNumericProperty("generic.current_allocated_bytes",
 459                                 &allocated_bytes) &&
 460         ext->GetNumericProperty("tcmalloc.pageheap_unmapped_bytes",
 461                                 &unmapped_bytes)) {
 462       *size = heap_size - allocated_bytes - unmapped_bytes;
 463       return true;
 464     }
 465     DCHECK(false);
 466     return false;
 467   }
 468
 469   static void GetStatsThunk(char* buffer, int buffer_length) {
 470     MallocExtension::instance()->GetStats(buffer, buffer_length);
 471   }
 472
 473   static void ReleaseFreeMemoryThunk() {
 474     MallocExtension::instance()->ReleaseFreeMemory();
 475   }
 476 #endif
 477
 478   virtual int Initialize(const ContentMainParams& params) OVERRIDE {
 479     ui_task_ = params.ui_task;
 480
 481 #if defined(OS_WIN)
 482     RegisterInvalidParamHandler();
 483     ui::win::CreateATLModuleIfNeeded();
 484
 485     sandbox_info_ = *params.sandbox_info;
 486 #else  // !OS_WIN
 487
 488 #if defined(OS_ANDROID)
 489     // See note at the initialization of ExitManager, below; basically,
 490     // only Android builds have the ctor/dtor handlers set up to use
 491     // TRACE_EVENT right away.
 492     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 493 #endif  // OS_ANDROID
 494
 495     // NOTE(willchan): One might ask why these TCMalloc-related calls are done
 496     // here rather than in process_util_linux.cc with the definition of
 497     // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
 498     // dependency on TCMalloc.  Really, we ought to have our allocator shim code
 499     // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.
 500     // This works for now.
 501 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 502
 503 #if defined(TYPE_PROFILING)
 504     base::type_profiler::InterceptFunctions::SetFunctions(
 505         base::type_profiler::NewInterceptForTCMalloc,
 506         base::type_profiler::DeleteInterceptForTCMalloc);
 507 #endif
 508
 509     // For tcmalloc, we need to tell it to behave like new.
 510     tc_set_new_mode(1);
 511
 512     // On windows, we've already set these thunks up in _heap_init()
 513     base::allocator::SetGetAllocatorWasteSizeFunction(
 514         GetAllocatorWasteSizeThunk);
 515     base::allocator::SetGetStatsFunction(GetStatsThunk);
 516     base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
 517
 518     // Provide optional hook for monitoring allocation quantities on a
 519     // per-thread basis.  Only set the hook if the environment indicates this
 520     // needs to be enabled.
 521     const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
 522     if (profiling &&
 523         (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
 524       tracked_objects::SetAlternateTimeSource(
 525           MallocExtension::GetBytesAllocatedOnCurrentThread,
 526           tracked_objects::TIME_SOURCE_TYPE_TCMALLOC);
 527     }
 528 #endif  // !OS_MACOSX && USE_TCMALLOC
 529
 530     // On Android,
 531     // - setlocale() is not supported.
 532     // - We do not override the signal handlers so that we can get
 533     //   stack trace when crashing.
 534     // - The ipc_fd is passed through the Java service.
 535     // Thus, these are all disabled.
 536 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 537     // Set C library locale to make sure CommandLine can parse argument values
 538     // in correct encoding.
 539     setlocale(LC_ALL, "");
 540
 541     SetupSignalHandlers();
 542
 543     base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance();
 544     g_fds->Set(kPrimaryIPCChannel,
 545                kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor);
 546 #endif  // !OS_ANDROID && !OS_IOS
 547
 548 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 549     g_fds->Set(kCrashDumpSignal,
 550                kCrashDumpSignal + base::GlobalDescriptors::kBaseDescriptor);
 551 #endif
 552
 553 #endif  // !OS_WIN
 554
 555     is_initialized_ = true;
 556     delegate_ = params.delegate;
 557
 558     // The exit manager is in charge of calling the dtors of singleton objects.
 559     // On Android, AtExitManager is set up when library is loaded.
 560     // On iOS, it's set up in main(), which can't call directly through to here.
 561     // A consequence of this is that you can't use the ctor/dtor-based
 562     // TRACE_EVENT methods on Linux or iOS builds till after we set this up.
 563 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 564     if (!ui_task_) {
 565       // When running browser tests, don't create a second AtExitManager as that
 566       // interfers with shutdown when objects created before ContentMain is
 567       // called are destructed when it returns.
 568       exit_manager_.reset(new base::AtExitManager);
 569     }
 570 #endif  // !OS_ANDROID && !OS_IOS
 571
 572 #if defined(OS_MACOSX)
 573     // We need this pool for all the objects created before we get to the
 574     // event loop, but we don't want to leave them hanging around until the
 575     // app quits. Each "main" needs to flush this pool right before it goes into
 576     // its main event loop to get rid of the cruft.
 577     autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
 578 #endif
 579
 580     // On Android, the command line is initialized when library is loaded and
 581     // we have already started our TRACE_EVENT0.
 582 #if !defined(OS_ANDROID)
 583     // argc/argv are ignored on Windows and Android; see command_line.h for
 584     // details.
 585     int argc = 0;
 586     const char** argv = NULL;
 587
 588 #if !defined(OS_WIN)
 589     argc = params.argc;
 590     argv = params.argv;
 591 #endif
 592
 593     base::CommandLine::Init(argc, argv);
 594
 595     if (!delegate_ || delegate_->ShouldEnableTerminationOnHeapCorruption())
 596       base::EnableTerminationOnHeapCorruption();
 597     base::EnableTerminationOnOutOfMemory();
 598
 599 #if !defined(OS_IOS)
 600     SetProcessTitleFromCommandLine(argv);
 601 #endif
 602 #endif // !OS_ANDROID
 603
 604     int exit_code = 0;
 605     if (delegate_ && delegate_->BasicStartupComplete(&exit_code))
 606       return exit_code;
 607
 608     completed_basic_startup_ = true;
 609
 610     const base::CommandLine& command_line =
 611         *base::CommandLine::ForCurrentProcess();
 612     std::string process_type =
 613         command_line.GetSwitchValueASCII(switches::kProcessType);
 614
 615 #if !defined(OS_IOS)
 616     // Initialize mojo here so that services can be registered.
 617     InitializeMojo();
 618 #endif
 619
 620     if (!GetContentClient())
 621       SetContentClient(&empty_content_client_);
 622     ContentClientInitializer::Set(process_type, delegate_);
 623
 624 #if defined(OS_WIN)
 625     // Route stdio to parent console (if any) or create one.
 626     if (command_line.HasSwitch(switches::kEnableLogging))
 627       base::RouteStdioToConsole();
 628 #endif
 629
 630     // Enable startup tracing asap to avoid early TRACE_EVENT calls being
 631     // ignored.
 632     if (command_line.HasSwitch(switches::kTraceStartup)) {
 633       base::debug::CategoryFilter category_filter(
 634           command_line.GetSwitchValueASCII(switches::kTraceStartup));
 635       base::debug::TraceLog::GetInstance()->SetEnabled(
 636           category_filter,
 637           base::debug::TraceLog::RECORDING_MODE,
 638           base::debug::TraceOptions(
 639               base::debug::RECORD_UNTIL_FULL));
 640     }
 641 #if !defined(OS_ANDROID)
 642     // Android tracing started at the beginning of the method.
 643     // Other OSes have to wait till we get here in order for all the memory
 644     // management setup to be completed.
 645     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 646 #endif // !OS_ANDROID
 647
 648 #if defined(OS_MACOSX) && !defined(OS_IOS)
 649     // We need to allocate the IO Ports before the Sandbox is initialized or
 650     // the first instance of PowerMonitor is created.
 651     // It's important not to allocate the ports for processes which don't
 652     // register with the power monitor - see crbug.com/88867.
 653     if (process_type.empty() ||
 654         (delegate_ &&
 655          delegate_->ProcessRegistersWithSystemProcess(process_type))) {
 656       base::PowerMonitorDeviceSource::AllocateSystemIOPorts();
 657     }
 658
 659     if (!process_type.empty() &&
 660         (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
 661       MachBroker::ChildSendTaskPortToParent();
 662     }
 663 #elif defined(OS_WIN)
 664     base::TimeTicks::SetNowIsHighResNowIfSupported();
 665
 666     bool init_device_scale_factor = true;
 667     if (command_line.HasSwitch(switches::kDeviceScaleFactor)) {
 668       std::string scale_factor_string = command_line.GetSwitchValueASCII(
 669           switches::kDeviceScaleFactor);
 670       double scale_factor = 0;
 671       if (base::StringToDouble(scale_factor_string, &scale_factor)) {
 672         init_device_scale_factor = false;
 673         gfx::InitDeviceScaleFactor(scale_factor);
 674       }
 675     }
 676     if (init_device_scale_factor)
 677       ui::win::InitDeviceScaleFactor();
 678
 679     SetupCRT(command_line);
 680 #endif
 681
 682 #if defined(OS_POSIX)
 683     if (!process_type.empty()) {
 684       // When you hit Ctrl-C in a terminal running the browser
 685       // process, a SIGINT is delivered to the entire process group.
 686       // When debugging the browser process via gdb, gdb catches the
 687       // SIGINT for the browser process (and dumps you back to the gdb
 688       // console) but doesn't for the child processes, killing them.
 689       // The fix is to have child processes ignore SIGINT; they'll die
 690       // on their own when the browser process goes away.
 691       //
 692       // Note that we *can't* rely on BeingDebugged to catch this case because
 693       // we are the child process, which is not being debugged.
 694       // TODO(evanm): move this to some shared subprocess-init function.
 695       if (!base::debug::BeingDebugged())
 696         signal(SIGINT, SIG_IGN);
 697     }
 698 #endif
 699
 700 #if defined(USE_NSS)
 701     crypto::EarlySetupForNSSInit();
 702 #endif
 703
 704     ui::RegisterPathProvider();
 705     RegisterPathProvider();
 706     RegisterContentSchemes(true);
 707
 708 #if defined(OS_ANDROID)
 709     int icudata_fd = base::GlobalDescriptors::GetInstance()->MaybeGet(
 710         kAndroidICUDataDescriptor);
 711     if (icudata_fd != -1)
 712       CHECK(base::i18n::InitializeICUWithFileDescriptor(icudata_fd));
 713     else
 714       CHECK(base::i18n::InitializeICU());
 715 #else
 716     CHECK(base::i18n::InitializeICU());
 717 #endif
 718
 719     InitializeStatsTable(command_line);
 720
 721     if (delegate_)
 722       delegate_->PreSandboxStartup();
 723
 724     if (!process_type.empty())
 725       CommonSubprocessInit(process_type);
 726
 727 #if defined(OS_WIN)
 728     CHECK(InitializeSandbox(params.sandbox_info));
 729 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 730     if (process_type == switches::kRendererProcess ||
 731         process_type == switches::kPpapiPluginProcess ||
 732         (delegate_ && delegate_->DelaySandboxInitialization(process_type))) {
 733       // On OS X the renderer sandbox needs to be initialized later in the
 734       // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
 735     } else {
 736       CHECK(InitializeSandbox());
 737     }
 738 #endif
 739
 740     if (delegate_)
 741       delegate_->SandboxInitialized(process_type);
 742
 743 #if defined(OS_TIZEN_MOBILE)
 744     if (process_type.empty())
 745       StoreArgvPointerAddress(argv);
 746     else
 747       SetProcessTitleFromCommandLine(argv);
 748 #elif defined(OS_POSIX) && !defined(OS_IOS) && !defined(OS_ANDROID)
 749     SetProcessTitleFromCommandLine(argv);
 750 #endif
 751
 752     // Return -1 to indicate no early termination.
 753     return -1;
 754   }
 755
 756   virtual int Run() OVERRIDE {
 757     DCHECK(is_initialized_);
 758     DCHECK(!is_shutdown_);
 759     const base::CommandLine& command_line =
 760         *base::CommandLine::ForCurrentProcess();
 761     std::string process_type =
 762         command_line.GetSwitchValueASCII(switches::kProcessType);
 763
 764     MainFunctionParams main_params(command_line);
 765     main_params.ui_task = ui_task_;
 766 #if defined(OS_WIN)
 767     main_params.sandbox_info = &sandbox_info_;
 768 #elif defined(OS_MACOSX)
 769     main_params.autorelease_pool = autorelease_pool_.get();
 770 #endif
 771
 772 #if !defined(OS_IOS)
 773     return RunNamedProcessTypeMain(process_type, main_params, delegate_);
 774 #else
 775     return 1;
 776 #endif
 777   }
 778
 779   virtual void Shutdown() OVERRIDE {
 780     DCHECK(is_initialized_);
 781     DCHECK(!is_shutdown_);
 782
 783     if (completed_basic_startup_ && delegate_) {
 784       const base::CommandLine& command_line =
 785           *base::CommandLine::ForCurrentProcess();
 786       std::string process_type =
 787           command_line.GetSwitchValueASCII(switches::kProcessType);
 788
 789       delegate_->ProcessExiting(process_type);
 790     }
 791
 792 #if defined(OS_WIN)
 793 #ifdef _CRTDBG_MAP_ALLOC
 794     _CrtDumpMemoryLeaks();
 795 #endif  // _CRTDBG_MAP_ALLOC
 796 #endif  // OS_WIN
 797
 798 #if defined(OS_MACOSX)
 799     autorelease_pool_.reset(NULL);
 800 #endif
 801
 802     exit_manager_.reset(NULL);
 803
 804     delegate_ = NULL;
 805     is_shutdown_ = true;
 806   }
 807
 808  private:
 809   // True if the runner has been initialized.
 810   bool is_initialized_;
 811
 812   // True if the runner has been shut down.
 813   bool is_shutdown_;
 814
 815   // True if basic startup was completed.
 816   bool completed_basic_startup_;
 817
 818   // Used if the embedder doesn't set one.
 819   ContentClient empty_content_client_;
 820
 821   // The delegate will outlive this object.
 822   ContentMainDelegate* delegate_;
 823
 824   scoped_ptr<base::AtExitManager> exit_manager_;
 825 #if defined(OS_WIN)
 826   sandbox::SandboxInterfaceInfo sandbox_info_;
 827 #elif defined(OS_MACOSX)
 828   scoped_ptr<base::mac::ScopedNSAutoreleasePool> autorelease_pool_;
 829 #endif
 830
 831   base::Closure* ui_task_;
 832
 833   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 834 };
 835
 836 // static
 837 ContentMainRunner* ContentMainRunner::Create() {
 838   return new ContentMainRunnerImpl();
 839 }
 840
 841 }  // namespace content