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 "components/tracing/startup_tracing.h"
  31 #include "content/browser/browser_main.h"
  32 #include "content/common/set_process_title.h"
  33 #include "content/common/url_schemes.h"
  34 #include "content/gpu/in_process_gpu_thread.h"
  35 #include "content/public/app/content_main.h"
  36 #include "content/public/app/content_main_delegate.h"
  37 #include "content/public/app/startup_helper_win.h"
  38 #include "content/public/browser/content_browser_client.h"
  39 #include "content/public/common/content_client.h"
  40 #include "content/public/common/content_constants.h"
  41 #include "content/public/common/content_paths.h"
  42 #include "content/public/common/content_switches.h"
  43 #include "content/public/common/main_function_params.h"
  44 #include "content/public/common/sandbox_init.h"
  45 #include "content/renderer/in_process_renderer_thread.h"
  46 #include "content/utility/in_process_utility_thread.h"
  47 #include "crypto/nss_util.h"
  48 #include "ipc/ipc_descriptors.h"
  49 #include "ipc/ipc_switches.h"
  50 #include "media/base/media.h"
  51 #include "sandbox/win/src/sandbox_types.h"
  52 #include "ui/base/ui_base_paths.h"
  53 #include "ui/base/ui_base_switches.h"
  54
  55 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
  56 #include "gin/v8_initializer.h"
  57 #endif
  58
  59 #if defined(USE_TCMALLOC)
  60 #include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
  61 #if defined(TYPE_PROFILING)
  62 #include "base/allocator/type_profiler.h"
  63 #include "base/allocator/type_profiler_tcmalloc.h"
  64 #endif
  65 #endif
  66
  67 #if !defined(OS_IOS)
  68 #include "content/app/mojo/mojo_init.h"
  69 #include "content/browser/gpu/gpu_process_host.h"
  70 #include "content/browser/renderer_host/render_process_host_impl.h"
  71 #include "content/browser/utility_process_host_impl.h"
  72 #include "content/public/plugin/content_plugin_client.h"
  73 #include "content/public/renderer/content_renderer_client.h"
  74 #include "content/public/utility/content_utility_client.h"
  75 #endif
  76
  77 #if defined(OS_WIN)
  78 #include <malloc.h>
  79 #include <cstring>
  80
  81 #include "base/strings/string_number_conversions.h"
  82 #include "base/trace_event/trace_event_etw_export_win.h"
  83 #include "ui/base/win/atl_module.h"
  84 #include "ui/gfx/win/dpi.h"
  85 #elif defined(OS_MACOSX)
  86 #include "base/mac/scoped_nsautorelease_pool.h"
  87 #if !defined(OS_IOS)
  88 #include "base/power_monitor/power_monitor_device_source.h"
  89 #include "content/app/mac/mac_init.h"
  90 #include "content/browser/browser_io_surface_manager_mac.h"
  91 #include "content/browser/mach_broker_mac.h"
  92 #include "content/child/child_io_surface_manager_mac.h"
  93 #include "content/common/sandbox_init_mac.h"
  94 #endif  // !OS_IOS
  95 #endif  // OS_WIN
  96
  97 #if defined(OS_POSIX)
  98 #include <signal.h>
  99
 100 #include "base/posix/global_descriptors.h"
 101 #include "content/public/common/content_descriptors.h"
 102
 103 #if !defined(OS_MACOSX)
 104 #include "content/public/common/content_descriptors.h"
 105 #include "content/public/common/zygote_fork_delegate_linux.h"
 106 #endif
 107 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 108 #include "content/zygote/zygote_main.h"
 109 #endif
 110
 111 #endif  // OS_POSIX
 112
 113 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 114 extern "C" {
 115 int tc_set_new_mode(int mode);
 116 }
 117 #endif
 118
 119 namespace content {
 120 extern int GpuMain(const content::MainFunctionParams&);
 121 #if defined(ENABLE_PLUGINS)
 122 #if !defined(OS_LINUX)
 123 extern int PluginMain(const content::MainFunctionParams&);
 124 #endif
 125 extern int PpapiPluginMain(const MainFunctionParams&);
 126 extern int PpapiBrokerMain(const MainFunctionParams&);
 127 #endif
 128 extern int RendererMain(const content::MainFunctionParams&);
 129 extern int UtilityMain(const MainFunctionParams&);
 130 }  // namespace content
 131
 132 namespace content {
 133
 134 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 135 base::LazyInstance<ContentBrowserClient>
 136     g_empty_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 137 #endif  //  !CHROME_MULTIPLE_DLL_CHILD
 138
 139 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 140 base::LazyInstance<ContentPluginClient>
 141     g_empty_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 142 base::LazyInstance<ContentRendererClient>
 143     g_empty_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 144 base::LazyInstance<ContentUtilityClient>
 145     g_empty_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 146 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 147
 148 #if defined(OS_WIN)
 149
 150 #endif  // defined(OS_WIN)
 151
 152 #if defined(OS_POSIX) && !defined(OS_IOS)
 153
 154 // Setup signal-handling state: resanitize most signals, ignore SIGPIPE.
 155 void SetupSignalHandlers() {
 156   // Sanitise our signal handling state. Signals that were ignored by our
 157   // parent will also be ignored by us. We also inherit our parent's sigmask.
 158   sigset_t empty_signal_set;
 159   CHECK(0 == sigemptyset(&empty_signal_set));
 160   CHECK(0 == sigprocmask(SIG_SETMASK, &empty_signal_set, NULL));
 161
 162   struct sigaction sigact;
 163   memset(&sigact, 0, sizeof(sigact));
 164   sigact.sa_handler = SIG_DFL;
 165   static const int signals_to_reset[] =
 166       {SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV,
 167        SIGALRM, SIGTERM, SIGCHLD, SIGBUS, SIGTRAP};  // SIGPIPE is set below.
 168   for (unsigned i = 0; i < arraysize(signals_to_reset); i++) {
 169     CHECK(0 == sigaction(signals_to_reset[i], &sigact, NULL));
 170   }
 171
 172   // Always ignore SIGPIPE.  We check the return value of write().
 173   CHECK(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
 174 }
 175
 176 #endif  // OS_POSIX && !OS_IOS
 177
 178 void CommonSubprocessInit(const std::string& process_type) {
 179 #if defined(OS_WIN)
 180   // HACK: Let Windows know that we have started.  This is needed to suppress
 181   // the IDC_APPSTARTING cursor from being displayed for a prolonged period
 182   // while a subprocess is starting.
 183   PostThreadMessage(GetCurrentThreadId(), WM_NULL, 0, 0);
 184   MSG msg;
 185   PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
 186 #endif
 187 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 188   // Various things break when you're using a locale where the decimal
 189   // separator isn't a period.  See e.g. bugs 22782 and 39964.  For
 190   // all processes except the browser process (where we call system
 191   // APIs that may rely on the correct locale for formatting numbers
 192   // when presenting them to the user), reset the locale for numeric
 193   // formatting.
 194   // Note that this is not correct for plugin processes -- they can
 195   // surface UI -- but it's likely they get this wrong too so why not.
 196   setlocale(LC_NUMERIC, "C");
 197 #endif
 198 }
 199
 200 // Only needed on Windows for creating stats tables.
 201 #if defined(OS_WIN)
 202 static base::ProcessId GetBrowserPid(const base::CommandLine& command_line) {
 203   base::ProcessId browser_pid = base::GetCurrentProcId();
 204   if (command_line.HasSwitch(switches::kProcessChannelID)) {
 205     std::string channel_name =
 206         command_line.GetSwitchValueASCII(switches::kProcessChannelID);
 207
 208     int browser_pid_int;
 209     base::StringToInt(channel_name, &browser_pid_int);
 210     browser_pid = static_cast<base::ProcessId>(browser_pid_int);
 211     DCHECK_NE(browser_pid_int, 0);
 212   }
 213   return browser_pid;
 214 }
 215 #endif
 216
 217 class ContentClientInitializer {
 218  public:
 219   static void Set(const std::string& process_type,
 220                   ContentMainDelegate* delegate) {
 221     ContentClient* content_client = GetContentClient();
 222 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 223     if (process_type.empty()) {
 224       if (delegate)
 225         content_client->browser_ = delegate->CreateContentBrowserClient();
 226       if (!content_client->browser_)
 227         content_client->browser_ = &g_empty_content_browser_client.Get();
 228     }
 229 #endif  // !CHROME_MULTIPLE_DLL_CHILD
 230
 231 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 232     if (process_type == switches::kPluginProcess ||
 233         process_type == switches::kPpapiPluginProcess) {
 234       if (delegate)
 235         content_client->plugin_ = delegate->CreateContentPluginClient();
 236       if (!content_client->plugin_)
 237         content_client->plugin_ = &g_empty_content_plugin_client.Get();
 238       // Single process not supported in split dll mode.
 239     } else if (process_type == switches::kRendererProcess ||
 240                base::CommandLine::ForCurrentProcess()->HasSwitch(
 241                    switches::kSingleProcess)) {
 242       if (delegate)
 243         content_client->renderer_ = delegate->CreateContentRendererClient();
 244       if (!content_client->renderer_)
 245         content_client->renderer_ = &g_empty_content_renderer_client.Get();
 246     }
 247
 248     if (process_type == switches::kUtilityProcess ||
 249         base::CommandLine::ForCurrentProcess()->HasSwitch(
 250             switches::kSingleProcess)) {
 251       if (delegate)
 252         content_client->utility_ = delegate->CreateContentUtilityClient();
 253       // TODO(scottmg): http://crbug.com/237249 Should be in _child.
 254       if (!content_client->utility_)
 255         content_client->utility_ = &g_empty_content_utility_client.Get();
 256     }
 257 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 258   }
 259 };
 260
 261 // We dispatch to a process-type-specific FooMain() based on a command-line
 262 // flag.  This struct is used to build a table of (flag, main function) pairs.
 263 struct MainFunction {
 264   const char* name;
 265   int (*function)(const MainFunctionParams&);
 266 };
 267
 268 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 269 // On platforms that use the zygote, we have a special subset of
 270 // subprocesses that are launched via the zygote.  This function
 271 // fills in some process-launching bits around ZygoteMain().
 272 // Returns the exit code of the subprocess.
 273 int RunZygote(const MainFunctionParams& main_function_params,
 274               ContentMainDelegate* delegate) {
 275   static const MainFunction kMainFunctions[] = {
 276     { switches::kRendererProcess,    RendererMain },
 277 #if defined(ENABLE_PLUGINS)
 278     { switches::kPpapiPluginProcess, PpapiPluginMain },
 279 #endif
 280     { switches::kUtilityProcess,     UtilityMain },
 281   };
 282
 283   ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
 284   if (delegate) {
 285     delegate->ZygoteStarting(&zygote_fork_delegates);
 286     media::InitializeMediaLibrary();
 287   }
 288
 289   // This function call can return multiple times, once per fork().
 290   if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
 291     return 1;
 292
 293   if (delegate) delegate->ZygoteForked();
 294
 295   // Zygote::HandleForkRequest may have reallocated the command
 296   // line so update it here with the new version.
 297   const base::CommandLine& command_line =
 298       *base::CommandLine::ForCurrentProcess();
 299   std::string process_type =
 300       command_line.GetSwitchValueASCII(switches::kProcessType);
 301   ContentClientInitializer::Set(process_type, delegate);
 302
 303   MainFunctionParams main_params(command_line);
 304   main_params.zygote_child = true;
 305
 306   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 307     if (process_type == kMainFunctions[i].name)
 308       return kMainFunctions[i].function(main_params);
 309   }
 310
 311   if (delegate)
 312     return delegate->RunProcess(process_type, main_params);
 313
 314   NOTREACHED() << "Unknown zygote process type: " << process_type;
 315   return 1;
 316 }
 317 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 318
 319 #if !defined(OS_IOS)
 320 static void RegisterMainThreadFactories() {
 321 #if !defined(CHROME_MULTIPLE_DLL_BROWSER) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 322   UtilityProcessHostImpl::RegisterUtilityMainThreadFactory(
 323       CreateInProcessUtilityThread);
 324   RenderProcessHostImpl::RegisterRendererMainThreadFactory(
 325       CreateInProcessRendererThread);
 326   GpuProcessHost::RegisterGpuMainThreadFactory(
 327       CreateInProcessGpuThread);
 328 #else
 329   base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
 330   if (command_line.HasSwitch(switches::kSingleProcess)) {
 331     LOG(FATAL) <<
 332         "--single-process is not supported in chrome multiple dll browser.";
 333   }
 334   if (command_line.HasSwitch(switches::kInProcessGPU)) {
 335     LOG(FATAL) <<
 336         "--in-process-gpu is not supported in chrome multiple dll browser.";
 337   }
 338 #endif  // !CHROME_MULTIPLE_DLL_BROWSER && !CHROME_MULTIPLE_DLL_CHILD
 339 }
 340
 341 // Run the FooMain() for a given process type.
 342 // If |process_type| is empty, runs BrowserMain().
 343 // Returns the exit code for this process.
 344 int RunNamedProcessTypeMain(
 345     const std::string& process_type,
 346     const MainFunctionParams& main_function_params,
 347     ContentMainDelegate* delegate) {
 348   static const MainFunction kMainFunctions[] = {
 349 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 350     { "",                            BrowserMain },
 351 #endif
 352 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 353 #if defined(ENABLE_PLUGINS)
 354 #if !defined(OS_LINUX)
 355     { switches::kPluginProcess,      PluginMain },
 356 #endif
 357     { switches::kPpapiPluginProcess, PpapiPluginMain },
 358     { switches::kPpapiBrokerProcess, PpapiBrokerMain },
 359 #endif  // ENABLE_PLUGINS
 360     { switches::kUtilityProcess,     UtilityMain },
 361     { switches::kRendererProcess,    RendererMain },
 362     { switches::kGpuProcess,         GpuMain },
 363 #endif  // !CHROME_MULTIPLE_DLL_BROWSER
 364   };
 365
 366   RegisterMainThreadFactories();
 367
 368   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 369     if (process_type == kMainFunctions[i].name) {
 370       if (delegate) {
 371         int exit_code = delegate->RunProcess(process_type,
 372             main_function_params);
 373 #if defined(OS_ANDROID)
 374         // In Android's browser process, the negative exit code doesn't mean the
 375         // default behavior should be used as the UI message loop is managed by
 376         // the Java and the browser process's default behavior is always
 377         // overridden.
 378         if (process_type.empty())
 379           return exit_code;
 380 #endif
 381         if (exit_code >= 0)
 382           return exit_code;
 383       }
 384       return kMainFunctions[i].function(main_function_params);
 385     }
 386   }
 387
 388 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 389   // Zygote startup is special -- see RunZygote comments above
 390   // for why we don't use ZygoteMain directly.
 391   if (process_type == switches::kZygoteProcess)
 392     return RunZygote(main_function_params, delegate);
 393 #endif
 394
 395   // If it's a process we don't know about, the embedder should know.
 396   if (delegate)
 397     return delegate->RunProcess(process_type, main_function_params);
 398
 399   NOTREACHED() << "Unknown process type: " << process_type;
 400   return 1;
 401 }
 402 #endif  // !OS_IOS
 403
 404 class ContentMainRunnerImpl : public ContentMainRunner {
 405  public:
 406   ContentMainRunnerImpl()
 407       : is_initialized_(false),
 408         is_shutdown_(false),
 409         completed_basic_startup_(false),
 410         delegate_(NULL),
 411         ui_task_(NULL) {
 412 #if defined(OS_WIN)
 413     memset(&sandbox_info_, 0, sizeof(sandbox_info_));
 414 #endif
 415   }
 416
 417   ~ContentMainRunnerImpl() override {
 418     if (is_initialized_ && !is_shutdown_)
 419       Shutdown();
 420   }
 421
 422 #if defined(USE_TCMALLOC)
 423   static bool GetAllocatorWasteSizeThunk(size_t* size) {
 424     size_t heap_size, allocated_bytes, unmapped_bytes;
 425     MallocExtension* ext = MallocExtension::instance();
 426     if (ext->GetNumericProperty("generic.heap_size", &heap_size) &&
 427         ext->GetNumericProperty("generic.current_allocated_bytes",
 428                                 &allocated_bytes) &&
 429         ext->GetNumericProperty("tcmalloc.pageheap_unmapped_bytes",
 430                                 &unmapped_bytes)) {
 431       *size = heap_size - allocated_bytes - unmapped_bytes;
 432       return true;
 433     }
 434     DCHECK(false);
 435     return false;
 436   }
 437
 438   static void GetStatsThunk(char* buffer, int buffer_length) {
 439     MallocExtension::instance()->GetStats(buffer, buffer_length);
 440   }
 441
 442   static void ReleaseFreeMemoryThunk() {
 443     MallocExtension::instance()->ReleaseFreeMemory();
 444   }
 445 #endif
 446
 447   int Initialize(const ContentMainParams& params) override {
 448     ui_task_ = params.ui_task;
 449
 450     base::EnableTerminationOnOutOfMemory();
 451 #if defined(OS_WIN)
 452     RegisterInvalidParamHandler();
 453     ui::win::CreateATLModuleIfNeeded();
 454
 455     sandbox_info_ = *params.sandbox_info;
 456 #else  // !OS_WIN
 457
 458 #if defined(OS_ANDROID)
 459     // See note at the initialization of ExitManager, below; basically,
 460     // only Android builds have the ctor/dtor handlers set up to use
 461     // TRACE_EVENT right away.
 462     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 463 #endif  // OS_ANDROID
 464
 465     // NOTE(willchan): One might ask why these TCMalloc-related calls are done
 466     // here rather than in process_util_linux.cc with the definition of
 467     // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
 468     // dependency on TCMalloc.  Really, we ought to have our allocator shim code
 469     // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.
 470     // This works for now.
 471 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 472
 473 #if defined(TYPE_PROFILING)
 474     base::type_profiler::InterceptFunctions::SetFunctions(
 475         base::type_profiler::NewInterceptForTCMalloc,
 476         base::type_profiler::DeleteInterceptForTCMalloc);
 477 #endif
 478
 479     // For tcmalloc, we need to tell it to behave like new.
 480     tc_set_new_mode(1);
 481
 482     // On windows, we've already set these thunks up in _heap_init()
 483     base::allocator::SetGetAllocatorWasteSizeFunction(
 484         GetAllocatorWasteSizeThunk);
 485     base::allocator::SetGetStatsFunction(GetStatsThunk);
 486     base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
 487
 488     // Provide optional hook for monitoring allocation quantities on a
 489     // per-thread basis.  Only set the hook if the environment indicates this
 490     // needs to be enabled.
 491     const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
 492     if (profiling &&
 493         (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
 494       tracked_objects::SetAlternateTimeSource(
 495           MallocExtension::GetBytesAllocatedOnCurrentThread,
 496           tracked_objects::TIME_SOURCE_TYPE_TCMALLOC);
 497     }
 498 #endif  // !OS_MACOSX && USE_TCMALLOC
 499
 500 #if !defined(OS_IOS)
 501     base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance();
 502 #endif
 503
 504     // On Android,
 505     // - setlocale() is not supported.
 506     // - We do not override the signal handlers so that we can get
 507     //   stack trace when crashing.
 508     // - The ipc_fd is passed through the Java service.
 509     // Thus, these are all disabled.
 510 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 511     // Set C library locale to make sure CommandLine can parse argument values
 512     // in correct encoding.
 513     setlocale(LC_ALL, "");
 514
 515     SetupSignalHandlers();
 516     g_fds->Set(kPrimaryIPCChannel,
 517                kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor);
 518 #endif  // !OS_ANDROID && !OS_IOS
 519
 520 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 521     g_fds->Set(kCrashDumpSignal,
 522                kCrashDumpSignal + base::GlobalDescriptors::kBaseDescriptor);
 523 #endif  // OS_LINUX || OS_OPENBSD
 524
 525
 526 #endif  // !OS_WIN
 527
 528     is_initialized_ = true;
 529     delegate_ = params.delegate;
 530
 531     // The exit manager is in charge of calling the dtors of singleton objects.
 532     // On Android, AtExitManager is set up when library is loaded.
 533     // On iOS, it's set up in main(), which can't call directly through to here.
 534     // A consequence of this is that you can't use the ctor/dtor-based
 535     // TRACE_EVENT methods on Linux or iOS builds till after we set this up.
 536 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 537     if (!ui_task_) {
 538       // When running browser tests, don't create a second AtExitManager as that
 539       // interfers with shutdown when objects created before ContentMain is
 540       // called are destructed when it returns.
 541       exit_manager_.reset(new base::AtExitManager);
 542     }
 543 #endif  // !OS_ANDROID && !OS_IOS
 544
 545     // Don't create this loop on iOS, since the outer loop is already handled
 546     // and a loop that's destroyed in shutdown interleaves badly with the event
 547     // loop pool on iOS.
 548 #if defined(OS_MACOSX) && !defined(OS_IOS)
 549     // We need this pool for all the objects created before we get to the
 550     // event loop, but we don't want to leave them hanging around until the
 551     // app quits. Each "main" needs to flush this pool right before it goes into
 552     // its main event loop to get rid of the cruft.
 553     autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
 554     InitializeMac();
 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::TraceConfig trace_config(
 630           command_line.GetSwitchValueASCII(switches::kTraceStartup),
 631           base::trace_event::RECORD_UNTIL_FULL);
 632       base::trace_event::TraceLog::GetInstance()->SetEnabled(
 633           trace_config,
 634           base::trace_event::TraceLog::RECORDING_MODE);
 635     } else if (process_type != switches::kZygoteProcess) {
 636       // There is no need to schedule stopping tracing in this case. Telemetry
 637       // will stop tracing on demand later.
 638       tracing::EnableStartupTracingIfConfigFileExists();
 639     }
 640
 641 #if defined(OS_WIN)
 642     // Enable exporting of events to ETW if requested on the command line.
 643     if (command_line.HasSwitch(switches::kTraceExportEventsToETW))
 644       base::trace_event::TraceEventETWExport::EnableETWExport();
 645 #endif  // OS_WIN
 646
 647 #if !defined(OS_ANDROID)
 648     // Android tracing started at the beginning of the method.
 649     // Other OSes have to wait till we get here in order for all the memory
 650     // management setup to be completed.
 651     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 652 #endif // !OS_ANDROID
 653
 654 #if defined(OS_MACOSX) && !defined(OS_IOS)
 655     // We need to allocate the IO Ports before the Sandbox is initialized or
 656     // the first instance of PowerMonitor is created.
 657     // It's important not to allocate the ports for processes which don't
 658     // register with the power monitor - see crbug.com/88867.
 659     if (process_type.empty() ||
 660         (delegate_ &&
 661          delegate_->ProcessRegistersWithSystemProcess(process_type))) {
 662       base::PowerMonitorDeviceSource::AllocateSystemIOPorts();
 663     }
 664
 665     if (!process_type.empty() &&
 666         (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
 667       MachBroker::ChildSendTaskPortToParent();
 668     }
 669
 670     if (!command_line.HasSwitch(switches::kSingleProcess) &&
 671         !process_type.empty() && (process_type == switches::kRendererProcess ||
 672                                   process_type == switches::kGpuProcess)) {
 673       base::mac::ScopedMachSendRight service_port =
 674           BrowserIOSurfaceManager::LookupServicePort(getppid());
 675       if (service_port.is_valid()) {
 676         ChildIOSurfaceManager::GetInstance()->set_service_port(
 677             service_port.release());
 678         IOSurfaceManager::SetInstance(ChildIOSurfaceManager::GetInstance());
 679       }
 680     }
 681 #elif defined(OS_WIN)
 682     SetupCRT(command_line);
 683 #endif
 684
 685 #if defined(OS_POSIX)
 686     if (!process_type.empty()) {
 687       // When you hit Ctrl-C in a terminal running the browser
 688       // process, a SIGINT is delivered to the entire process group.
 689       // When debugging the browser process via gdb, gdb catches the
 690       // SIGINT for the browser process (and dumps you back to the gdb
 691       // console) but doesn't for the child processes, killing them.
 692       // The fix is to have child processes ignore SIGINT; they'll die
 693       // on their own when the browser process goes away.
 694       //
 695       // Note that we *can't* rely on BeingDebugged to catch this case because
 696       // we are the child process, which is not being debugged.
 697       // TODO(evanm): move this to some shared subprocess-init function.
 698       if (!base::debug::BeingDebugged())
 699         signal(SIGINT, SIG_IGN);
 700     }
 701 #endif
 702
 703 #if defined(USE_NSS_CERTS)
 704     crypto::EarlySetupForNSSInit();
 705 #endif
 706
 707     ui::RegisterPathProvider();
 708     RegisterPathProvider();
 709     RegisterContentSchemes(true);
 710
 711 #if defined(OS_ANDROID)
 712     int icudata_fd = g_fds->MaybeGet(kAndroidICUDataDescriptor);
 713     if (icudata_fd != -1) {
 714       auto icudata_region = g_fds->GetRegion(kAndroidICUDataDescriptor);
 715       CHECK(base::i18n::InitializeICUWithFileDescriptor(icudata_fd,
 716                                                         icudata_region));
 717     } else {
 718       CHECK(base::i18n::InitializeICU());
 719     }
 720 #else
 721     CHECK(base::i18n::InitializeICU());
 722 #endif  // OS_ANDROID
 723
 724     base::StatisticsRecorder::Initialize();
 725
 726 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
 727 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 728 #if !defined(OS_ANDROID)
 729     // kV8NativesDataDescriptor and kV8SnapshotDataDescriptor could be shared
 730     // with child processes via file descriptors. On Android they are set in
 731     // ChildProcessService::InternalInitChildProcess, otherwise set them here.
 732     if (command_line.HasSwitch(switches::kV8NativesPassedByFD)) {
 733       g_fds->Set(
 734           kV8NativesDataDescriptor,
 735           kV8NativesDataDescriptor + base::GlobalDescriptors::kBaseDescriptor);
 736     }
 737     if (command_line.HasSwitch(switches::kV8SnapshotPassedByFD)) {
 738       g_fds->Set(
 739           kV8SnapshotDataDescriptor,
 740           kV8SnapshotDataDescriptor + base::GlobalDescriptors::kBaseDescriptor);
 741     }
 742 #endif  // !OS_ANDROID
 743     int v8_natives_fd = g_fds->MaybeGet(kV8NativesDataDescriptor);
 744     int v8_snapshot_fd = g_fds->MaybeGet(kV8SnapshotDataDescriptor);
 745     if (v8_snapshot_fd != -1) {
 746       auto v8_snapshot_region = g_fds->GetRegion(kV8SnapshotDataDescriptor);
 747       gin::V8Initializer::LoadV8SnapshotFromFD(
 748           v8_snapshot_fd, v8_snapshot_region.offset, v8_snapshot_region.size);
 749     } else {
 750       gin::V8Initializer::LoadV8Snapshot();
 751     }
 752     if (v8_natives_fd != -1) {
 753       auto v8_natives_region = g_fds->GetRegion(kV8NativesDataDescriptor);
 754       gin::V8Initializer::LoadV8NativesFromFD(
 755           v8_natives_fd, v8_natives_region.offset, v8_natives_region.size);
 756     } else {
 757       gin::V8Initializer::LoadV8Natives();
 758     }
 759 #else
 760     gin::V8Initializer::LoadV8Snapshot();
 761     gin::V8Initializer::LoadV8Natives();
 762 #endif  // OS_POSIX && !OS_MACOSX
 763 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 764
 765     if (delegate_)
 766       delegate_->PreSandboxStartup();
 767
 768     if (!process_type.empty())
 769       CommonSubprocessInit(process_type);
 770
 771 #if defined(OS_WIN)
 772     CHECK(InitializeSandbox(params.sandbox_info));
 773 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 774     if (process_type == switches::kRendererProcess ||
 775         process_type == switches::kPpapiPluginProcess ||
 776         (delegate_ && delegate_->DelaySandboxInitialization(process_type))) {
 777       // On OS X the renderer sandbox needs to be initialized later in the
 778       // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
 779     } else {
 780       CHECK(InitializeSandbox());
 781     }
 782 #endif
 783
 784     if (delegate_)
 785       delegate_->SandboxInitialized(process_type);
 786
 787     // Return -1 to indicate no early termination.
 788     return -1;
 789   }
 790
 791   int Run() override {
 792     DCHECK(is_initialized_);
 793     DCHECK(!is_shutdown_);
 794     const base::CommandLine& command_line =
 795         *base::CommandLine::ForCurrentProcess();
 796     std::string process_type =
 797         command_line.GetSwitchValueASCII(switches::kProcessType);
 798
 799     MainFunctionParams main_params(command_line);
 800     main_params.ui_task = ui_task_;
 801 #if defined(OS_WIN)
 802     main_params.sandbox_info = &sandbox_info_;
 803 #elif defined(OS_MACOSX)
 804     main_params.autorelease_pool = autorelease_pool_.get();
 805 #endif
 806
 807 #if !defined(OS_IOS)
 808     return RunNamedProcessTypeMain(process_type, main_params, delegate_);
 809 #else
 810     return 1;
 811 #endif
 812   }
 813
 814   void Shutdown() override {
 815     DCHECK(is_initialized_);
 816     DCHECK(!is_shutdown_);
 817
 818     if (completed_basic_startup_ && delegate_) {
 819       const base::CommandLine& command_line =
 820           *base::CommandLine::ForCurrentProcess();
 821       std::string process_type =
 822           command_line.GetSwitchValueASCII(switches::kProcessType);
 823
 824       delegate_->ProcessExiting(process_type);
 825     }
 826
 827 #if defined(OS_WIN)
 828 #ifdef _CRTDBG_MAP_ALLOC
 829     _CrtDumpMemoryLeaks();
 830 #endif  // _CRTDBG_MAP_ALLOC
 831 #endif  // OS_WIN
 832
 833 #if defined(OS_MACOSX) && !defined(OS_IOS)
 834     autorelease_pool_.reset(NULL);
 835 #endif
 836
 837     exit_manager_.reset(NULL);
 838
 839     delegate_ = NULL;
 840     is_shutdown_ = true;
 841   }
 842
 843  private:
 844   // True if the runner has been initialized.
 845   bool is_initialized_;
 846
 847   // True if the runner has been shut down.
 848   bool is_shutdown_;
 849
 850   // True if basic startup was completed.
 851   bool completed_basic_startup_;
 852
 853   // Used if the embedder doesn't set one.
 854   ContentClient empty_content_client_;
 855
 856   // The delegate will outlive this object.
 857   ContentMainDelegate* delegate_;
 858
 859   scoped_ptr<base::AtExitManager> exit_manager_;
 860 #if defined(OS_WIN)
 861   sandbox::SandboxInterfaceInfo sandbox_info_;
 862 #elif defined(OS_MACOSX)
 863   scoped_ptr<base::mac::ScopedNSAutoreleasePool> autorelease_pool_;
 864 #endif
 865
 866   base::Closure* ui_task_;
 867
 868   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 869 };
 870
 871 // static
 872 ContentMainRunner* ContentMainRunner::Create() {
 873   return new ContentMainRunnerImpl();
 874 }
 875
 876 }  // namespace content