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