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/stack_trace.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/statistics_recorder.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/profiler/scoped_tracker.h"
  27 #include "base/strings/string_number_conversions.h"
  28 #include "base/strings/string_util.h"
  29 #include "base/strings/stringprintf.h"
  30 #include "base/trace_event/trace_event.h"
  31 #include "components/tracing/trace_config_file.h"
  32 #include "components/tracing/tracing_switches.h"
  33 #include "content/browser/browser_main.h"
  34 #include "content/common/set_process_title.h"
  35 #include "content/common/url_schemes.h"
  36 #include "content/gpu/in_process_gpu_thread.h"
  37 #include "content/public/app/content_main.h"
  38 #include "content/public/app/content_main_delegate.h"
  39 #include "content/public/app/startup_helper_win.h"
  40 #include "content/public/browser/content_browser_client.h"
  41 #include "content/public/common/content_client.h"
  42 #include "content/public/common/content_constants.h"
  43 #include "content/public/common/content_paths.h"
  44 #include "content/public/common/content_switches.h"
  45 #include "content/public/common/main_function_params.h"
  46 #include "content/public/common/sandbox_init.h"
  47 #include "content/renderer/in_process_renderer_thread.h"
  48 #include "content/utility/in_process_utility_thread.h"
  49 #include "crypto/nss_util.h"
  50 #include "ipc/ipc_descriptors.h"
  51 #include "ipc/ipc_switches.h"
  52 #include "media/base/media.h"
  53 #include "sandbox/win/src/sandbox_types.h"
  54 #include "ui/base/ui_base_paths.h"
  55 #include "ui/base/ui_base_switches.h"
  56
  57 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
  58 #include "gin/v8_initializer.h"
  59 #endif
  60
  61 #if defined(USE_TCMALLOC)
  62 #include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
  63 #if defined(TYPE_PROFILING)
  64 #include "base/allocator/type_profiler.h"
  65 #include "base/allocator/type_profiler_tcmalloc.h"
  66 #endif
  67 #endif
  68
  69 #if !defined(OS_IOS)
  70 #include "content/app/mojo/mojo_init.h"
  71 #include "content/browser/gpu/gpu_process_host.h"
  72 #include "content/browser/renderer_host/render_process_host_impl.h"
  73 #include "content/browser/utility_process_host_impl.h"
  74 #include "content/public/plugin/content_plugin_client.h"
  75 #include "content/public/renderer/content_renderer_client.h"
  76 #include "content/public/utility/content_utility_client.h"
  77 #endif
  78
  79 #if defined(OS_WIN)
  80 #include <malloc.h>
  81 #include <cstring>
  82
  83 #include "base/strings/string_number_conversions.h"
  84 #include "base/trace_event/trace_event_etw_export_win.h"
  85 #include "ui/base/win/atl_module.h"
  86 #include "ui/gfx/win/dpi.h"
  87 #elif defined(OS_MACOSX)
  88 #include "base/mac/scoped_nsautorelease_pool.h"
  89 #if !defined(OS_IOS)
  90 #include "base/power_monitor/power_monitor_device_source.h"
  91 #include "content/app/mac/mac_init.h"
  92 #include "content/browser/browser_io_surface_manager_mac.h"
  93 #include "content/browser/mach_broker_mac.h"
  94 #include "content/child/child_io_surface_manager_mac.h"
  95 #include "content/common/sandbox_init_mac.h"
  96 #endif  // !OS_IOS
  97 #endif  // OS_WIN
  98
  99 #if defined(OS_POSIX)
 100 #include <signal.h>
 101
 102 #include "base/posix/global_descriptors.h"
 103 #include "content/public/common/content_descriptors.h"
 104
 105 #if !defined(OS_MACOSX)
 106 #include "content/public/common/content_descriptors.h"
 107 #include "content/public/common/zygote_fork_delegate_linux.h"
 108 #endif
 109 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 110 #include "content/zygote/zygote_main.h"
 111 #endif
 112
 113 #endif  // OS_POSIX
 114
 115 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 116 extern "C" {
 117 int tc_set_new_mode(int mode);
 118 }
 119 #endif
 120
 121 namespace content {
 122 extern int GpuMain(const content::MainFunctionParams&);
 123 #if defined(ENABLE_PLUGINS)
 124 #if !defined(OS_LINUX)
 125 extern int PluginMain(const content::MainFunctionParams&);
 126 #endif
 127 extern int PpapiPluginMain(const MainFunctionParams&);
 128 extern int PpapiBrokerMain(const MainFunctionParams&);
 129 #endif
 130 extern int RendererMain(const content::MainFunctionParams&);
 131 extern int UtilityMain(const MainFunctionParams&);
 132 }  // namespace content
 133
 134 namespace content {
 135
 136 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 137 base::LazyInstance<ContentBrowserClient>
 138     g_empty_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 139 #endif  //  !CHROME_MULTIPLE_DLL_CHILD
 140
 141 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 142 base::LazyInstance<ContentPluginClient>
 143     g_empty_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 144 base::LazyInstance<ContentRendererClient>
 145     g_empty_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 146 base::LazyInstance<ContentUtilityClient>
 147     g_empty_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 148 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 149
 150 #if defined(OS_WIN)
 151
 152 #endif  // defined(OS_WIN)
 153
 154 #if defined(OS_POSIX) && !defined(OS_IOS)
 155
 156 // Setup signal-handling state: resanitize most signals, ignore SIGPIPE.
 157 void SetupSignalHandlers() {
 158   // Sanitise our signal handling state. Signals that were ignored by our
 159   // parent will also be ignored by us. We also inherit our parent's sigmask.
 160   sigset_t empty_signal_set;
 161   CHECK(0 == sigemptyset(&empty_signal_set));
 162   CHECK(0 == sigprocmask(SIG_SETMASK, &empty_signal_set, NULL));
 163
 164   struct sigaction sigact;
 165   memset(&sigact, 0, sizeof(sigact));
 166   sigact.sa_handler = SIG_DFL;
 167   static const int signals_to_reset[] =
 168       {SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV,
 169        SIGALRM, SIGTERM, SIGCHLD, SIGBUS, SIGTRAP};  // SIGPIPE is set below.
 170   for (unsigned i = 0; i < arraysize(signals_to_reset); i++) {
 171     CHECK(0 == sigaction(signals_to_reset[i], &sigact, NULL));
 172   }
 173
 174   // Always ignore SIGPIPE.  We check the return value of write().
 175   CHECK(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
 176 }
 177
 178 #endif  // OS_POSIX && !OS_IOS
 179
 180 void CommonSubprocessInit(const std::string& process_type) {
 181 #if defined(OS_WIN)
 182   // HACK: Let Windows know that we have started.  This is needed to suppress
 183   // the IDC_APPSTARTING cursor from being displayed for a prolonged period
 184   // while a subprocess is starting.
 185   PostThreadMessage(GetCurrentThreadId(), WM_NULL, 0, 0);
 186   MSG msg;
 187   PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
 188 #endif
 189 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 190   // Various things break when you're using a locale where the decimal
 191   // separator isn't a period.  See e.g. bugs 22782 and 39964.  For
 192   // all processes except the browser process (where we call system
 193   // APIs that may rely on the correct locale for formatting numbers
 194   // when presenting them to the user), reset the locale for numeric
 195   // formatting.
 196   // Note that this is not correct for plugin processes -- they can
 197   // surface UI -- but it's likely they get this wrong too so why not.
 198   setlocale(LC_NUMERIC, "C");
 199 #endif
 200
 201 #if !defined(OFFICIAL_BUILD)
 202   // Print stack traces to stderr when crashes occur. This opens up security
 203   // holes so it should never be enabled for official builds.
 204   base::debug::EnableInProcessStackDumping();
 205 #if defined(OS_WIN)
 206   base::RouteStdioToConsole(false);
 207   LoadLibraryA("dbghelp.dll");
 208 #endif
 209 #endif
 210 }
 211
 212 class ContentClientInitializer {
 213  public:
 214   static void Set(const std::string& process_type,
 215                   ContentMainDelegate* delegate) {
 216     ContentClient* content_client = GetContentClient();
 217 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 218     if (process_type.empty()) {
 219       if (delegate)
 220         content_client->browser_ = delegate->CreateContentBrowserClient();
 221       if (!content_client->browser_)
 222         content_client->browser_ = &g_empty_content_browser_client.Get();
 223     }
 224 #endif  // !CHROME_MULTIPLE_DLL_CHILD
 225
 226 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 227     if (process_type == switches::kPluginProcess ||
 228         process_type == switches::kPpapiPluginProcess) {
 229       if (delegate)
 230         content_client->plugin_ = delegate->CreateContentPluginClient();
 231       if (!content_client->plugin_)
 232         content_client->plugin_ = &g_empty_content_plugin_client.Get();
 233       // Single process not supported in split dll mode.
 234     } else if (process_type == switches::kRendererProcess ||
 235                base::CommandLine::ForCurrentProcess()->HasSwitch(
 236                    switches::kSingleProcess)) {
 237       if (delegate)
 238         content_client->renderer_ = delegate->CreateContentRendererClient();
 239       if (!content_client->renderer_)
 240         content_client->renderer_ = &g_empty_content_renderer_client.Get();
 241     }
 242
 243     if (process_type == switches::kUtilityProcess ||
 244         base::CommandLine::ForCurrentProcess()->HasSwitch(
 245             switches::kSingleProcess)) {
 246       if (delegate)
 247         content_client->utility_ = delegate->CreateContentUtilityClient();
 248       // TODO(scottmg): http://crbug.com/237249 Should be in _child.
 249       if (!content_client->utility_)
 250         content_client->utility_ = &g_empty_content_utility_client.Get();
 251     }
 252 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 253   }
 254 };
 255
 256 // We dispatch to a process-type-specific FooMain() based on a command-line
 257 // flag.  This struct is used to build a table of (flag, main function) pairs.
 258 struct MainFunction {
 259   const char* name;
 260   int (*function)(const MainFunctionParams&);
 261 };
 262
 263 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 264 // On platforms that use the zygote, we have a special subset of
 265 // subprocesses that are launched via the zygote.  This function
 266 // fills in some process-launching bits around ZygoteMain().
 267 // Returns the exit code of the subprocess.
 268 int RunZygote(const MainFunctionParams& main_function_params,
 269               ContentMainDelegate* delegate) {
 270   static const MainFunction kMainFunctions[] = {
 271     { switches::kRendererProcess,    RendererMain },
 272 #if defined(ENABLE_PLUGINS)
 273     { switches::kPpapiPluginProcess, PpapiPluginMain },
 274 #endif
 275     { switches::kUtilityProcess,     UtilityMain },
 276   };
 277
 278   ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
 279   if (delegate) {
 280     delegate->ZygoteStarting(&zygote_fork_delegates);
 281     media::InitializeMediaLibrary();
 282   }
 283
 284   // This function call can return multiple times, once per fork().
 285   if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
 286     return 1;
 287
 288   if (delegate) delegate->ZygoteForked();
 289
 290   // Zygote::HandleForkRequest may have reallocated the command
 291   // line so update it here with the new version.
 292   const base::CommandLine& command_line =
 293       *base::CommandLine::ForCurrentProcess();
 294   std::string process_type =
 295       command_line.GetSwitchValueASCII(switches::kProcessType);
 296   ContentClientInitializer::Set(process_type, delegate);
 297
 298   MainFunctionParams main_params(command_line);
 299   main_params.zygote_child = true;
 300
 301   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 302     if (process_type == kMainFunctions[i].name)
 303       return kMainFunctions[i].function(main_params);
 304   }
 305
 306   if (delegate)
 307     return delegate->RunProcess(process_type, main_params);
 308
 309   NOTREACHED() << "Unknown zygote process type: " << process_type;
 310   return 1;
 311 }
 312 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 313
 314 #if !defined(OS_IOS)
 315 static void RegisterMainThreadFactories() {
 316 #if !defined(CHROME_MULTIPLE_DLL_BROWSER) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 317   UtilityProcessHostImpl::RegisterUtilityMainThreadFactory(
 318       CreateInProcessUtilityThread);
 319   RenderProcessHostImpl::RegisterRendererMainThreadFactory(
 320       CreateInProcessRendererThread);
 321   GpuProcessHost::RegisterGpuMainThreadFactory(
 322       CreateInProcessGpuThread);
 323 #else
 324   base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
 325   if (command_line.HasSwitch(switches::kSingleProcess)) {
 326     LOG(FATAL) <<
 327         "--single-process is not supported in chrome multiple dll browser.";
 328   }
 329   if (command_line.HasSwitch(switches::kInProcessGPU)) {
 330     LOG(FATAL) <<
 331         "--in-process-gpu is not supported in chrome multiple dll browser.";
 332   }
 333 #endif  // !CHROME_MULTIPLE_DLL_BROWSER && !CHROME_MULTIPLE_DLL_CHILD
 334 }
 335
 336 // Run the FooMain() for a given process type.
 337 // If |process_type| is empty, runs BrowserMain().
 338 // Returns the exit code for this process.
 339 int RunNamedProcessTypeMain(
 340     const std::string& process_type,
 341     const MainFunctionParams& main_function_params,
 342     ContentMainDelegate* delegate) {
 343   static const MainFunction kMainFunctions[] = {
 344 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 345     { "",                            BrowserMain },
 346 #endif
 347 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 348 #if defined(ENABLE_PLUGINS)
 349 #if !defined(OS_LINUX)
 350     { switches::kPluginProcess,      PluginMain },
 351 #endif
 352     { switches::kPpapiPluginProcess, PpapiPluginMain },
 353     { switches::kPpapiBrokerProcess, PpapiBrokerMain },
 354 #endif  // ENABLE_PLUGINS
 355     { switches::kUtilityProcess,     UtilityMain },
 356     { switches::kRendererProcess,    RendererMain },
 357     { switches::kGpuProcess,         GpuMain },
 358 #endif  // !CHROME_MULTIPLE_DLL_BROWSER
 359   };
 360
 361   RegisterMainThreadFactories();
 362
 363   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 364     if (process_type == kMainFunctions[i].name) {
 365       if (delegate) {
 366         int exit_code = delegate->RunProcess(process_type,
 367             main_function_params);
 368 #if defined(OS_ANDROID)
 369         // In Android's browser process, the negative exit code doesn't mean the
 370         // default behavior should be used as the UI message loop is managed by
 371         // the Java and the browser process's default behavior is always
 372         // overridden.
 373         if (process_type.empty())
 374           return exit_code;
 375 #endif
 376         if (exit_code >= 0)
 377           return exit_code;
 378       }
 379       return kMainFunctions[i].function(main_function_params);
 380     }
 381   }
 382
 383 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 384   // Zygote startup is special -- see RunZygote comments above
 385   // for why we don't use ZygoteMain directly.
 386   if (process_type == switches::kZygoteProcess)
 387     return RunZygote(main_function_params, delegate);
 388 #endif
 389
 390   // If it's a process we don't know about, the embedder should know.
 391   if (delegate)
 392     return delegate->RunProcess(process_type, main_function_params);
 393
 394   NOTREACHED() << "Unknown process type: " << process_type;
 395   return 1;
 396 }
 397 #endif  // !OS_IOS
 398
 399 class ContentMainRunnerImpl : public ContentMainRunner {
 400  public:
 401   ContentMainRunnerImpl()
 402       : is_initialized_(false),
 403         is_shutdown_(false),
 404         completed_basic_startup_(false),
 405         delegate_(NULL),
 406         ui_task_(NULL) {
 407 #if defined(OS_WIN)
 408     memset(&sandbox_info_, 0, sizeof(sandbox_info_));
 409 #endif
 410   }
 411
 412   ~ContentMainRunnerImpl() override {
 413     if (is_initialized_ && !is_shutdown_)
 414       Shutdown();
 415   }
 416
 417 #if defined(USE_TCMALLOC)
 418   static bool GetAllocatorWasteSizeThunk(size_t* size) {
 419     size_t heap_size, allocated_bytes, unmapped_bytes;
 420     MallocExtension* ext = MallocExtension::instance();
 421     if (ext->GetNumericProperty("generic.heap_size", &heap_size) &&
 422         ext->GetNumericProperty("generic.current_allocated_bytes",
 423                                 &allocated_bytes) &&
 424         ext->GetNumericProperty("tcmalloc.pageheap_unmapped_bytes",
 425                                 &unmapped_bytes)) {
 426       *size = heap_size - allocated_bytes - unmapped_bytes;
 427       return true;
 428     }
 429     DCHECK(false);
 430     return false;
 431   }
 432
 433   static void GetStatsThunk(char* buffer, int buffer_length) {
 434     MallocExtension::instance()->GetStats(buffer, buffer_length);
 435   }
 436
 437   static void ReleaseFreeMemoryThunk() {
 438     MallocExtension::instance()->ReleaseFreeMemory();
 439   }
 440 #endif
 441
 442   int Initialize(const ContentMainParams& params) override {
 443     ui_task_ = params.ui_task;
 444
 445     base::EnableTerminationOnOutOfMemory();
 446 #if defined(OS_WIN)
 447     RegisterInvalidParamHandler();
 448     ui::win::CreateATLModuleIfNeeded();
 449
 450     sandbox_info_ = *params.sandbox_info;
 451 #else  // !OS_WIN
 452
 453 #if defined(OS_ANDROID)
 454     // See note at the initialization of ExitManager, below; basically,
 455     // only Android builds have the ctor/dtor handlers set up to use
 456     // TRACE_EVENT right away.
 457     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 458 #endif  // OS_ANDROID
 459
 460     // NOTE(willchan): One might ask why these TCMalloc-related calls are done
 461     // here rather than in process_util_linux.cc with the definition of
 462     // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
 463     // dependency on TCMalloc.  Really, we ought to have our allocator shim code
 464     // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.
 465     // This works for now.
 466 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 467
 468 #if defined(TYPE_PROFILING)
 469     base::type_profiler::InterceptFunctions::SetFunctions(
 470         base::type_profiler::NewInterceptForTCMalloc,
 471         base::type_profiler::DeleteInterceptForTCMalloc);
 472 #endif
 473
 474     // For tcmalloc, we need to tell it to behave like new.
 475     tc_set_new_mode(1);
 476
 477     // On windows, we've already set these thunks up in _heap_init()
 478     base::allocator::SetGetAllocatorWasteSizeFunction(
 479         GetAllocatorWasteSizeThunk);
 480     base::allocator::SetGetStatsFunction(GetStatsThunk);
 481     base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
 482
 483     // Provide optional hook for monitoring allocation quantities on a
 484     // per-thread basis.  Only set the hook if the environment indicates this
 485     // needs to be enabled.
 486     const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
 487     if (profiling &&
 488         (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
 489       tracked_objects::SetAlternateTimeSource(
 490           MallocExtension::GetBytesAllocatedOnCurrentThread,
 491           tracked_objects::TIME_SOURCE_TYPE_TCMALLOC);
 492     }
 493 #endif  // !OS_MACOSX && USE_TCMALLOC
 494
 495 #if !defined(OS_IOS)
 496     base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance();
 497 #endif
 498
 499     // On Android,
 500     // - setlocale() is not supported.
 501     // - We do not override the signal handlers so that we can get
 502     //   stack trace when crashing.
 503     // - The ipc_fd is passed through the Java service.
 504     // Thus, these are all disabled.
 505 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 506     // Set C library locale to make sure CommandLine can parse argument values
 507     // in correct encoding.
 508     setlocale(LC_ALL, "");
 509
 510     SetupSignalHandlers();
 511     g_fds->Set(kPrimaryIPCChannel,
 512                kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor);
 513 #endif  // !OS_ANDROID && !OS_IOS
 514
 515 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 516     g_fds->Set(kCrashDumpSignal,
 517                kCrashDumpSignal + base::GlobalDescriptors::kBaseDescriptor);
 518 #endif  // OS_LINUX || OS_OPENBSD
 519
 520
 521 #endif  // !OS_WIN
 522
 523     is_initialized_ = true;
 524     delegate_ = params.delegate;
 525
 526     // The exit manager is in charge of calling the dtors of singleton objects.
 527     // On Android, AtExitManager is set up when library is loaded.
 528     // On iOS, it's set up in main(), which can't call directly through to here.
 529     // A consequence of this is that you can't use the ctor/dtor-based
 530     // TRACE_EVENT methods on Linux or iOS builds till after we set this up.
 531 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 532     if (!ui_task_) {
 533       // When running browser tests, don't create a second AtExitManager as that
 534       // interfers with shutdown when objects created before ContentMain is
 535       // called are destructed when it returns.
 536       exit_manager_.reset(new base::AtExitManager);
 537     }
 538 #endif  // !OS_ANDROID && !OS_IOS
 539
 540     // Don't create this loop on iOS, since the outer loop is already handled
 541     // and a loop that's destroyed in shutdown interleaves badly with the event
 542     // loop pool on iOS.
 543 #if defined(OS_MACOSX) && !defined(OS_IOS)
 544     // We need this pool for all the objects created before we get to the
 545     // event loop, but we don't want to leave them hanging around until the
 546     // app quits. Each "main" needs to flush this pool right before it goes into
 547     // its main event loop to get rid of the cruft.
 548     autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
 549     InitializeMac();
 550 #endif
 551
 552     // On Android, the command line is initialized when library is loaded and
 553     // we have already started our TRACE_EVENT0.
 554 #if !defined(OS_ANDROID)
 555     // argc/argv are ignored on Windows and Android; see command_line.h for
 556     // details.
 557     int argc = 0;
 558     const char** argv = NULL;
 559
 560 #if !defined(OS_WIN)
 561     argc = params.argc;
 562     argv = params.argv;
 563 #endif
 564
 565     base::CommandLine::Init(argc, argv);
 566
 567     base::EnableTerminationOnHeapCorruption();
 568
 569     // TODO(yiyaoliu, vadimt): Remove this once crbug.com/453640 is fixed.
 570     // Enable profiler recording right after command line is initialized so that
 571     // browser startup can be instrumented.
 572     if (delegate_ && delegate_->ShouldEnableProfilerRecording())
 573       tracked_objects::ScopedTracker::Enable();
 574
 575 #if !defined(OS_IOS)
 576     SetProcessTitleFromCommandLine(argv);
 577 #endif
 578 #endif // !OS_ANDROID
 579
 580     int exit_code = 0;
 581     if (delegate_ && delegate_->BasicStartupComplete(&exit_code))
 582       return exit_code;
 583
 584     completed_basic_startup_ = true;
 585
 586     const base::CommandLine& command_line =
 587         *base::CommandLine::ForCurrentProcess();
 588     std::string process_type =
 589         command_line.GetSwitchValueASCII(switches::kProcessType);
 590
 591 #if !defined(OS_IOS)
 592     // Initialize mojo here so that services can be registered.
 593     InitializeMojo();
 594 #endif
 595
 596 #if defined(OS_WIN)
 597     bool init_device_scale_factor = true;
 598     if (command_line.HasSwitch(switches::kDeviceScaleFactor)) {
 599       std::string scale_factor_string = command_line.GetSwitchValueASCII(
 600           switches::kDeviceScaleFactor);
 601       double scale_factor = 0;
 602       if (base::StringToDouble(scale_factor_string, &scale_factor)) {
 603         init_device_scale_factor = false;
 604         gfx::InitDeviceScaleFactor(scale_factor);
 605       }
 606     }
 607     if (init_device_scale_factor)
 608       gfx::InitDeviceScaleFactor(gfx::GetDPIScale());
 609 #endif
 610
 611     if (!GetContentClient())
 612       SetContentClient(&empty_content_client_);
 613     ContentClientInitializer::Set(process_type, delegate_);
 614
 615 #if defined(OS_WIN)
 616     // Route stdio to parent console (if any) or create one.
 617     if (command_line.HasSwitch(switches::kEnableLogging))
 618       base::RouteStdioToConsole(true);
 619 #endif
 620
 621     // Enable startup tracing asap to avoid early TRACE_EVENT calls being
 622     // ignored.
 623     if (command_line.HasSwitch(switches::kTraceStartup)) {
 624       base::trace_event::TraceConfig trace_config(
 625           command_line.GetSwitchValueASCII(switches::kTraceStartup),
 626           base::trace_event::RECORD_UNTIL_FULL);
 627       base::trace_event::TraceLog::GetInstance()->SetEnabled(
 628           trace_config,
 629           base::trace_event::TraceLog::RECORDING_MODE);
 630     } else if (process_type != switches::kZygoteProcess &&
 631                process_type != switches::kRendererProcess) {
 632       if (tracing::TraceConfigFile::GetInstance()->IsEnabled()) {
 633         base::trace_event::TraceLog::GetInstance()->SetEnabled(
 634             tracing::TraceConfigFile::GetInstance()->GetTraceConfig(),
 635             base::trace_event::TraceLog::RECORDING_MODE);
 636       }
 637     }
 638
 639 #if defined(OS_WIN)
 640     // Enable exporting of events to ETW if requested on the command line.
 641     if (command_line.HasSwitch(switches::kTraceExportEventsToETW))
 642       base::trace_event::TraceEventETWExport::EnableETWExport();
 643 #endif  // OS_WIN
 644
 645 #if !defined(OS_ANDROID)
 646     // Android tracing started at the beginning of the method.
 647     // Other OSes have to wait till we get here in order for all the memory
 648     // management setup to be completed.
 649     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 650 #endif // !OS_ANDROID
 651
 652 #if defined(OS_MACOSX) && !defined(OS_IOS)
 653     // We need to allocate the IO Ports before the Sandbox is initialized or
 654     // the first instance of PowerMonitor is created.
 655     // It's important not to allocate the ports for processes which don't
 656     // register with the power monitor - see crbug.com/88867.
 657     if (process_type.empty() ||
 658         (delegate_ &&
 659          delegate_->ProcessRegistersWithSystemProcess(process_type))) {
 660       base::PowerMonitorDeviceSource::AllocateSystemIOPorts();
 661     }
 662
 663     if (!process_type.empty() &&
 664         (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
 665       MachBroker::ChildSendTaskPortToParent();
 666     }
 667
 668     if (!command_line.HasSwitch(switches::kSingleProcess) &&
 669         !process_type.empty() && (process_type == switches::kRendererProcess ||
 670                                   process_type == switches::kGpuProcess)) {
 671       base::mac::ScopedMachSendRight service_port =
 672           BrowserIOSurfaceManager::LookupServicePort(getppid());
 673       if (service_port.is_valid()) {
 674         ChildIOSurfaceManager::GetInstance()->set_service_port(
 675             service_port.release());
 676         IOSurfaceManager::SetInstance(ChildIOSurfaceManager::GetInstance());
 677       }
 678     }
 679 #elif defined(OS_WIN)
 680     SetupCRT(command_line);
 681 #endif
 682
 683 #if defined(OS_POSIX)
 684     if (!process_type.empty()) {
 685       // When you hit Ctrl-C in a terminal running the browser
 686       // process, a SIGINT is delivered to the entire process group.
 687       // When debugging the browser process via gdb, gdb catches the
 688       // SIGINT for the browser process (and dumps you back to the gdb
 689       // console) but doesn't for the child processes, killing them.
 690       // The fix is to have child processes ignore SIGINT; they'll die
 691       // on their own when the browser process goes away.
 692       //
 693       // Note that we *can't* rely on BeingDebugged to catch this case because
 694       // we are the child process, which is not being debugged.
 695       // TODO(evanm): move this to some shared subprocess-init function.
 696       if (!base::debug::BeingDebugged())
 697         signal(SIGINT, SIG_IGN);
 698     }
 699 #endif
 700
 701 #if defined(USE_NSS_CERTS)
 702     crypto::EarlySetupForNSSInit();
 703 #endif
 704
 705     ui::RegisterPathProvider();
 706     RegisterPathProvider();
 707     RegisterContentSchemes(true);
 708
 709 #if defined(OS_ANDROID)
 710     int icudata_fd = g_fds->MaybeGet(kAndroidICUDataDescriptor);
 711     if (icudata_fd != -1) {
 712       auto icudata_region = g_fds->GetRegion(kAndroidICUDataDescriptor);
 713       CHECK(base::i18n::InitializeICUWithFileDescriptor(icudata_fd,
 714                                                         icudata_region));
 715     } else {
 716       CHECK(base::i18n::InitializeICU());
 717     }
 718 #else
 719     CHECK(base::i18n::InitializeICU());
 720 #endif  // OS_ANDROID
 721
 722     base::StatisticsRecorder::Initialize();
 723
 724 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
 725 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 726 #if !defined(OS_ANDROID)
 727     // kV8NativesDataDescriptor and kV8SnapshotDataDescriptor could be shared
 728     // with child processes via file descriptors. On Android they are set in
 729     // ChildProcessService::InternalInitChildProcess, otherwise set them here.
 730     if (command_line.HasSwitch(switches::kV8NativesPassedByFD)) {
 731       g_fds->Set(
 732           kV8NativesDataDescriptor,
 733           kV8NativesDataDescriptor + base::GlobalDescriptors::kBaseDescriptor);
 734     }
 735     if (command_line.HasSwitch(switches::kV8SnapshotPassedByFD)) {
 736       g_fds->Set(
 737           kV8SnapshotDataDescriptor,
 738           kV8SnapshotDataDescriptor + base::GlobalDescriptors::kBaseDescriptor);
 739     }
 740 #endif  // !OS_ANDROID
 741     int v8_natives_fd = g_fds->MaybeGet(kV8NativesDataDescriptor);
 742     int v8_snapshot_fd = g_fds->MaybeGet(kV8SnapshotDataDescriptor);
 743     if (v8_snapshot_fd != -1) {
 744       auto v8_snapshot_region = g_fds->GetRegion(kV8SnapshotDataDescriptor);
 745       gin::V8Initializer::LoadV8SnapshotFromFD(
 746           v8_snapshot_fd, v8_snapshot_region.offset, v8_snapshot_region.size);
 747     } else {
 748       gin::V8Initializer::LoadV8Snapshot();
 749     }
 750     if (v8_natives_fd != -1) {
 751       auto v8_natives_region = g_fds->GetRegion(kV8NativesDataDescriptor);
 752       gin::V8Initializer::LoadV8NativesFromFD(
 753           v8_natives_fd, v8_natives_region.offset, v8_natives_region.size);
 754     } else {
 755       gin::V8Initializer::LoadV8Natives();
 756     }
 757 #else
 758     gin::V8Initializer::LoadV8Snapshot();
 759     gin::V8Initializer::LoadV8Natives();
 760 #endif  // OS_POSIX && !OS_MACOSX
 761 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 762
 763     if (delegate_)
 764       delegate_->PreSandboxStartup();
 765
 766     if (!process_type.empty())
 767       CommonSubprocessInit(process_type);
 768
 769 #if defined(OS_WIN)
 770     CHECK(InitializeSandbox(params.sandbox_info));
 771 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 772     if (process_type == switches::kRendererProcess ||
 773         process_type == switches::kPpapiPluginProcess ||
 774         (delegate_ && delegate_->DelaySandboxInitialization(process_type))) {
 775       // On OS X the renderer sandbox needs to be initialized later in the
 776       // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
 777     } else {
 778       CHECK(InitializeSandbox());
 779     }
 780 #endif
 781
 782     if (delegate_)
 783       delegate_->SandboxInitialized(process_type);
 784
 785     // Return -1 to indicate no early termination.
 786     return -1;
 787   }
 788
 789   int Run() override {
 790     DCHECK(is_initialized_);
 791     DCHECK(!is_shutdown_);
 792     const base::CommandLine& command_line =
 793         *base::CommandLine::ForCurrentProcess();
 794     std::string process_type =
 795         command_line.GetSwitchValueASCII(switches::kProcessType);
 796
 797     MainFunctionParams main_params(command_line);
 798     main_params.ui_task = ui_task_;
 799 #if defined(OS_WIN)
 800     main_params.sandbox_info = &sandbox_info_;
 801 #elif defined(OS_MACOSX)
 802     main_params.autorelease_pool = autorelease_pool_.get();
 803 #endif
 804
 805 #if !defined(OS_IOS)
 806     return RunNamedProcessTypeMain(process_type, main_params, delegate_);
 807 #else
 808     return 1;
 809 #endif
 810   }
 811
 812   void Shutdown() override {
 813     DCHECK(is_initialized_);
 814     DCHECK(!is_shutdown_);
 815
 816     if (completed_basic_startup_ && delegate_) {
 817       const base::CommandLine& command_line =
 818           *base::CommandLine::ForCurrentProcess();
 819       std::string process_type =
 820           command_line.GetSwitchValueASCII(switches::kProcessType);
 821
 822       delegate_->ProcessExiting(process_type);
 823     }
 824
 825 #if defined(OS_WIN)
 826 #ifdef _CRTDBG_MAP_ALLOC
 827     _CrtDumpMemoryLeaks();
 828 #endif  // _CRTDBG_MAP_ALLOC
 829 #endif  // OS_WIN
 830
 831 #if defined(OS_MACOSX) && !defined(OS_IOS)
 832     autorelease_pool_.reset(NULL);
 833 #endif
 834
 835     exit_manager_.reset(NULL);
 836
 837     delegate_ = NULL;
 838     is_shutdown_ = true;
 839   }
 840
 841  private:
 842   // True if the runner has been initialized.
 843   bool is_initialized_;
 844
 845   // True if the runner has been shut down.
 846   bool is_shutdown_;
 847
 848   // True if basic startup was completed.
 849   bool completed_basic_startup_;
 850
 851   // Used if the embedder doesn't set one.
 852   ContentClient empty_content_client_;
 853
 854   // The delegate will outlive this object.
 855   ContentMainDelegate* delegate_;
 856
 857   scoped_ptr<base::AtExitManager> exit_manager_;
 858 #if defined(OS_WIN)
 859   sandbox::SandboxInterfaceInfo sandbox_info_;
 860 #elif defined(OS_MACOSX)
 861   scoped_ptr<base::mac::ScopedNSAutoreleasePool> autorelease_pool_;
 862 #endif
 863
 864   base::Closure* ui_task_;
 865
 866   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 867 };
 868
 869 // static
 870 ContentMainRunner* ContentMainRunner::Create() {
 871   return new ContentMainRunnerImpl();
 872 }
 873
 874 }  // namespace content