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