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/path_service.h"
  20 #include "base/process/launch.h"
  21 #include "base/process/memory.h"
  22 #include "base/process/process_handle.h"
  23 #include "base/profiler/alternate_timer.h"
  24 #include "base/profiler/scoped_tracker.h"
  25 #include "base/strings/string_number_conversions.h"
  26 #include "base/strings/string_util.h"
  27 #include "base/strings/stringprintf.h"
  28 #include "base/trace_event/trace_event.h"
  29 #include "content/browser/browser_main.h"
  30 #include "content/common/set_process_title.h"
  31 #include "content/common/url_schemes.h"
  32 #include "content/gpu/in_process_gpu_thread.h"
  33 #include "content/public/app/content_main.h"
  34 #include "content/public/app/content_main_delegate.h"
  35 #include "content/public/app/startup_helper_win.h"
  36 #include "content/public/browser/content_browser_client.h"
  37 #include "content/public/common/content_client.h"
  38 #include "content/public/common/content_constants.h"
  39 #include "content/public/common/content_paths.h"
  40 #include "content/public/common/content_switches.h"
  41 #include "content/public/common/main_function_params.h"
  42 #include "content/public/common/sandbox_init.h"
  43 #include "content/renderer/in_process_renderer_thread.h"
  44 #include "content/utility/in_process_utility_thread.h"
  45 #include "crypto/nss_util.h"
  46 #include "ipc/ipc_descriptors.h"
  47 #include "ipc/ipc_switches.h"
  48 #include "media/base/media.h"
  49 #include "sandbox/win/src/sandbox_types.h"
  50 #include "ui/base/ui_base_paths.h"
  51 #include "ui/base/ui_base_switches.h"
  52
  53 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
  54 #include "gin/public/isolate_holder.h"
  55 #endif
  56
  57 #if defined(USE_TCMALLOC)
  58 #include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
  59 #if defined(TYPE_PROFILING)
  60 #include "base/allocator/type_profiler.h"
  61 #include "base/allocator/type_profiler_tcmalloc.h"
  62 #endif
  63 #endif
  64
  65 #if !defined(OS_IOS)
  66 #include "content/app/mojo/mojo_init.h"
  67 #include "content/browser/gpu/gpu_process_host.h"
  68 #include "content/browser/renderer_host/render_process_host_impl.h"
  69 #include "content/browser/utility_process_host_impl.h"
  70 #include "content/public/plugin/content_plugin_client.h"
  71 #include "content/public/renderer/content_renderer_client.h"
  72 #include "content/public/utility/content_utility_client.h"
  73 #endif
  74
  75 #if defined(OS_WIN)
  76 #include <malloc.h>
  77 #include <cstring>
  78
  79 #include "base/strings/string_number_conversions.h"
  80 #include "ui/base/win/atl_module.h"
  81 #include "ui/gfx/win/dpi.h"
  82 #elif defined(OS_MACOSX)
  83 #include "base/mac/scoped_nsautorelease_pool.h"
  84 #if !defined(OS_IOS)
  85 #include "base/power_monitor/power_monitor_device_source.h"
  86 #include "content/browser/mach_broker_mac.h"
  87 #include "content/common/sandbox_init_mac.h"
  88 #endif  // !OS_IOS
  89 #endif  // OS_WIN
  90
  91 #if defined(OS_POSIX)
  92 #include <signal.h>
  93
  94 #include "base/posix/global_descriptors.h"
  95 #include "content/public/common/content_descriptors.h"
  96
  97 #if !defined(OS_MACOSX)
  98 #include "content/public/common/content_descriptors.h"
  99 #include "content/public/common/zygote_fork_delegate_linux.h"
 100 #endif
 101 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 102 #include "content/zygote/zygote_main.h"
 103 #endif
 104
 105 #endif  // OS_POSIX
 106
 107 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 108 extern "C" {
 109 int tc_set_new_mode(int mode);
 110 }
 111 #endif
 112
 113 namespace content {
 114 extern int GpuMain(const content::MainFunctionParams&);
 115 #if defined(ENABLE_PLUGINS)
 116 #if !defined(OS_LINUX)
 117 extern int PluginMain(const content::MainFunctionParams&);
 118 #endif
 119 extern int PpapiPluginMain(const MainFunctionParams&);
 120 extern int PpapiBrokerMain(const MainFunctionParams&);
 121 #endif
 122 extern int RendererMain(const content::MainFunctionParams&);
 123 extern int UtilityMain(const MainFunctionParams&);
 124 }  // namespace content
 125
 126 namespace content {
 127
 128 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 129 base::LazyInstance<ContentBrowserClient>
 130     g_empty_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 131 #endif  //  !CHROME_MULTIPLE_DLL_CHILD
 132
 133 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 134 base::LazyInstance<ContentPluginClient>
 135     g_empty_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 136 base::LazyInstance<ContentRendererClient>
 137     g_empty_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 138 base::LazyInstance<ContentUtilityClient>
 139     g_empty_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 140 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 141
 142 #if defined(OS_WIN)
 143
 144 #endif  // defined(OS_WIN)
 145
 146 #if defined(OS_POSIX) && !defined(OS_IOS)
 147
 148 // Setup signal-handling state: resanitize most signals, ignore SIGPIPE.
 149 void SetupSignalHandlers() {
 150   // Sanitise our signal handling state. Signals that were ignored by our
 151   // parent will also be ignored by us. We also inherit our parent's sigmask.
 152   sigset_t empty_signal_set;
 153   CHECK(0 == sigemptyset(&empty_signal_set));
 154   CHECK(0 == sigprocmask(SIG_SETMASK, &empty_signal_set, NULL));
 155
 156   struct sigaction sigact;
 157   memset(&sigact, 0, sizeof(sigact));
 158   sigact.sa_handler = SIG_DFL;
 159   static const int signals_to_reset[] =
 160       {SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV,
 161        SIGALRM, SIGTERM, SIGCHLD, SIGBUS, SIGTRAP};  // SIGPIPE is set below.
 162   for (unsigned i = 0; i < arraysize(signals_to_reset); i++) {
 163     CHECK(0 == sigaction(signals_to_reset[i], &sigact, NULL));
 164   }
 165
 166   // Always ignore SIGPIPE.  We check the return value of write().
 167   CHECK(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
 168 }
 169
 170 #endif  // OS_POSIX && !OS_IOS
 171
 172 void CommonSubprocessInit(const std::string& process_type) {
 173 #if defined(OS_WIN)
 174   // HACK: Let Windows know that we have started.  This is needed to suppress
 175   // the IDC_APPSTARTING cursor from being displayed for a prolonged period
 176   // while a subprocess is starting.
 177   PostThreadMessage(GetCurrentThreadId(), WM_NULL, 0, 0);
 178   MSG msg;
 179   PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
 180 #endif
 181 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 182   // Various things break when you're using a locale where the decimal
 183   // separator isn't a period.  See e.g. bugs 22782 and 39964.  For
 184   // all processes except the browser process (where we call system
 185   // APIs that may rely on the correct locale for formatting numbers
 186   // when presenting them to the user), reset the locale for numeric
 187   // formatting.
 188   // Note that this is not correct for plugin processes -- they can
 189   // surface UI -- but it's likely they get this wrong too so why not.
 190   setlocale(LC_NUMERIC, "C");
 191 #endif
 192 }
 193
 194 // Only needed on Windows for creating stats tables.
 195 #if defined(OS_WIN)
 196 static base::ProcessId GetBrowserPid(const base::CommandLine& command_line) {
 197   base::ProcessId browser_pid = base::GetCurrentProcId();
 198   if (command_line.HasSwitch(switches::kProcessChannelID)) {
 199     std::string channel_name =
 200         command_line.GetSwitchValueASCII(switches::kProcessChannelID);
 201
 202     int browser_pid_int;
 203     base::StringToInt(channel_name, &browser_pid_int);
 204     browser_pid = static_cast<base::ProcessId>(browser_pid_int);
 205     DCHECK_NE(browser_pid_int, 0);
 206   }
 207   return browser_pid;
 208 }
 209 #endif
 210
 211 class ContentClientInitializer {
 212  public:
 213   static void Set(const std::string& process_type,
 214                   ContentMainDelegate* delegate) {
 215     ContentClient* content_client = GetContentClient();
 216 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 217     if (process_type.empty()) {
 218       if (delegate)
 219         content_client->browser_ = delegate->CreateContentBrowserClient();
 220       if (!content_client->browser_)
 221         content_client->browser_ = &g_empty_content_browser_client.Get();
 222     }
 223 #endif  // !CHROME_MULTIPLE_DLL_CHILD
 224
 225 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 226     if (process_type == switches::kPluginProcess ||
 227         process_type == switches::kPpapiPluginProcess) {
 228       if (delegate)
 229         content_client->plugin_ = delegate->CreateContentPluginClient();
 230       if (!content_client->plugin_)
 231         content_client->plugin_ = &g_empty_content_plugin_client.Get();
 232       // Single process not supported in split dll mode.
 233     } else if (process_type == switches::kRendererProcess ||
 234                base::CommandLine::ForCurrentProcess()->HasSwitch(
 235                    switches::kSingleProcess)) {
 236       if (delegate)
 237         content_client->renderer_ = delegate->CreateContentRendererClient();
 238       if (!content_client->renderer_)
 239         content_client->renderer_ = &g_empty_content_renderer_client.Get();
 240     }
 241
 242     if (process_type == switches::kUtilityProcess ||
 243         base::CommandLine::ForCurrentProcess()->HasSwitch(
 244             switches::kSingleProcess)) {
 245       if (delegate)
 246         content_client->utility_ = delegate->CreateContentUtilityClient();
 247       // TODO(scottmg): http://crbug.com/237249 Should be in _child.
 248       if (!content_client->utility_)
 249         content_client->utility_ = &g_empty_content_utility_client.Get();
 250     }
 251 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 252   }
 253 };
 254
 255 // We dispatch to a process-type-specific FooMain() based on a command-line
 256 // flag.  This struct is used to build a table of (flag, main function) pairs.
 257 struct MainFunction {
 258   const char* name;
 259   int (*function)(const MainFunctionParams&);
 260 };
 261
 262 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 263 // On platforms that use the zygote, we have a special subset of
 264 // subprocesses that are launched via the zygote.  This function
 265 // fills in some process-launching bits around ZygoteMain().
 266 // Returns the exit code of the subprocess.
 267 int RunZygote(const MainFunctionParams& main_function_params,
 268               ContentMainDelegate* delegate) {
 269   static const MainFunction kMainFunctions[] = {
 270     { switches::kRendererProcess,    RendererMain },
 271 #if defined(ENABLE_PLUGINS)
 272     { switches::kPpapiPluginProcess, PpapiPluginMain },
 273 #endif
 274     { switches::kUtilityProcess,     UtilityMain },
 275   };
 276
 277   ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
 278   if (delegate) {
 279     delegate->ZygoteStarting(&zygote_fork_delegates);
 280     // Each Renderer we spawn will re-attempt initialization of the media
 281     // libraries, at which point failure will be detected and handled, so
 282     // we do not need to cope with initialization failures here.
 283     base::FilePath media_path;
 284     if (PathService::Get(DIR_MEDIA_LIBS, &media_path))
 285       media::InitializeMediaLibrary(media_path);
 286   }
 287
 288   // This function call can return multiple times, once per fork().
 289   if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
 290     return 1;
 291
 292   if (delegate) delegate->ZygoteForked();
 293
 294   // Zygote::HandleForkRequest may have reallocated the command
 295   // line so update it here with the new version.
 296   const base::CommandLine& command_line =
 297       *base::CommandLine::ForCurrentProcess();
 298   std::string process_type =
 299       command_line.GetSwitchValueASCII(switches::kProcessType);
 300   ContentClientInitializer::Set(process_type, delegate);
 301
 302   MainFunctionParams main_params(command_line);
 303   main_params.zygote_child = true;
 304
 305   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 306     if (process_type == kMainFunctions[i].name)
 307       return kMainFunctions[i].function(main_params);
 308   }
 309
 310   if (delegate)
 311     return delegate->RunProcess(process_type, main_params);
 312
 313   NOTREACHED() << "Unknown zygote process type: " << process_type;
 314   return 1;
 315 }
 316 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 317
 318 #if !defined(OS_IOS)
 319 static void RegisterMainThreadFactories() {
 320 #if !defined(CHROME_MULTIPLE_DLL_BROWSER) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 321   UtilityProcessHostImpl::RegisterUtilityMainThreadFactory(
 322       CreateInProcessUtilityThread);
 323   RenderProcessHostImpl::RegisterRendererMainThreadFactory(
 324       CreateInProcessRendererThread);
 325   GpuProcessHost::RegisterGpuMainThreadFactory(
 326       CreateInProcessGpuThread);
 327 #else
 328   base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
 329   if (command_line.HasSwitch(switches::kSingleProcess)) {
 330     LOG(FATAL) <<
 331         "--single-process is not supported in chrome multiple dll browser.";
 332   }
 333   if (command_line.HasSwitch(switches::kInProcessGPU)) {
 334     LOG(FATAL) <<
 335         "--in-process-gpu is not supported in chrome multiple dll browser.";
 336   }
 337 #endif  // !CHROME_MULTIPLE_DLL_BROWSER && !CHROME_MULTIPLE_DLL_CHILD
 338 }
 339
 340 // Run the FooMain() for a given process type.
 341 // If |process_type| is empty, runs BrowserMain().
 342 // Returns the exit code for this process.
 343 int RunNamedProcessTypeMain(
 344     const std::string& process_type,
 345     const MainFunctionParams& main_function_params,
 346     ContentMainDelegate* delegate) {
 347   static const MainFunction kMainFunctions[] = {
 348 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 349     { "",                            BrowserMain },
 350 #endif
 351 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 352 #if defined(ENABLE_PLUGINS)
 353 #if !defined(OS_LINUX)
 354     { switches::kPluginProcess,      PluginMain },
 355 #endif
 356     { switches::kPpapiPluginProcess, PpapiPluginMain },
 357     { switches::kPpapiBrokerProcess, PpapiBrokerMain },
 358 #endif  // ENABLE_PLUGINS
 359     { switches::kUtilityProcess,     UtilityMain },
 360     { switches::kRendererProcess,    RendererMain },
 361     { switches::kGpuProcess,         GpuMain },
 362 #endif  // !CHROME_MULTIPLE_DLL_BROWSER
 363   };
 364
 365   RegisterMainThreadFactories();
 366
 367   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 368     if (process_type == kMainFunctions[i].name) {
 369       if (delegate) {
 370         int exit_code = delegate->RunProcess(process_type,
 371             main_function_params);
 372 #if defined(OS_ANDROID)
 373         // In Android's browser process, the negative exit code doesn't mean the
 374         // default behavior should be used as the UI message loop is managed by
 375         // the Java and the browser process's default behavior is always
 376         // overridden.
 377         if (process_type.empty())
 378           return exit_code;
 379 #endif
 380         if (exit_code >= 0)
 381           return exit_code;
 382       }
 383       return kMainFunctions[i].function(main_function_params);
 384     }
 385   }
 386
 387 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 388   // Zygote startup is special -- see RunZygote comments above
 389   // for why we don't use ZygoteMain directly.
 390   if (process_type == switches::kZygoteProcess)
 391     return RunZygote(main_function_params, delegate);
 392 #endif
 393
 394   // If it's a process we don't know about, the embedder should know.
 395   if (delegate)
 396     return delegate->RunProcess(process_type, main_function_params);
 397
 398   NOTREACHED() << "Unknown process type: " << process_type;
 399   return 1;
 400 }
 401 #endif  // !OS_IOS
 402
 403 class ContentMainRunnerImpl : public ContentMainRunner {
 404  public:
 405   ContentMainRunnerImpl()
 406       : is_initialized_(false),
 407         is_shutdown_(false),
 408         completed_basic_startup_(false),
 409         delegate_(NULL),
 410         ui_task_(NULL) {
 411 #if defined(OS_WIN)
 412     memset(&sandbox_info_, 0, sizeof(sandbox_info_));
 413 #endif
 414   }
 415
 416   ~ContentMainRunnerImpl() override {
 417     if (is_initialized_ && !is_shutdown_)
 418       Shutdown();
 419   }
 420
 421 #if defined(USE_TCMALLOC)
 422   static bool GetAllocatorWasteSizeThunk(size_t* size) {
 423     size_t heap_size, allocated_bytes, unmapped_bytes;
 424     MallocExtension* ext = MallocExtension::instance();
 425     if (ext->GetNumericProperty("generic.heap_size", &heap_size) &&
 426         ext->GetNumericProperty("generic.current_allocated_bytes",
 427                                 &allocated_bytes) &&
 428         ext->GetNumericProperty("tcmalloc.pageheap_unmapped_bytes",
 429                                 &unmapped_bytes)) {
 430       *size = heap_size - allocated_bytes - unmapped_bytes;
 431       return true;
 432     }
 433     DCHECK(false);
 434     return false;
 435   }
 436
 437   static void GetStatsThunk(char* buffer, int buffer_length) {
 438     MallocExtension::instance()->GetStats(buffer, buffer_length);
 439   }
 440
 441   static void ReleaseFreeMemoryThunk() {
 442     MallocExtension::instance()->ReleaseFreeMemory();
 443   }
 444 #endif
 445
 446   int Initialize(const ContentMainParams& params) override {
 447     ui_task_ = params.ui_task;
 448
 449     base::EnableTerminationOnOutOfMemory();
 450 #if defined(OS_WIN)
 451     RegisterInvalidParamHandler();
 452     ui::win::CreateATLModuleIfNeeded();
 453
 454     sandbox_info_ = *params.sandbox_info;
 455 #else  // !OS_WIN
 456
 457 #if defined(OS_ANDROID)
 458     // See note at the initialization of ExitManager, below; basically,
 459     // only Android builds have the ctor/dtor handlers set up to use
 460     // TRACE_EVENT right away.
 461     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 462 #endif  // OS_ANDROID
 463
 464     // NOTE(willchan): One might ask why these TCMalloc-related calls are done
 465     // here rather than in process_util_linux.cc with the definition of
 466     // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
 467     // dependency on TCMalloc.  Really, we ought to have our allocator shim code
 468     // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.
 469     // This works for now.
 470 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 471
 472 #if defined(TYPE_PROFILING)
 473     base::type_profiler::InterceptFunctions::SetFunctions(
 474         base::type_profiler::NewInterceptForTCMalloc,
 475         base::type_profiler::DeleteInterceptForTCMalloc);
 476 #endif
 477
 478     // For tcmalloc, we need to tell it to behave like new.
 479     tc_set_new_mode(1);
 480
 481     // On windows, we've already set these thunks up in _heap_init()
 482     base::allocator::SetGetAllocatorWasteSizeFunction(
 483         GetAllocatorWasteSizeThunk);
 484     base::allocator::SetGetStatsFunction(GetStatsThunk);
 485     base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
 486
 487     // Provide optional hook for monitoring allocation quantities on a
 488     // per-thread basis.  Only set the hook if the environment indicates this
 489     // needs to be enabled.
 490     const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
 491     if (profiling &&
 492         (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
 493       tracked_objects::SetAlternateTimeSource(
 494           MallocExtension::GetBytesAllocatedOnCurrentThread,
 495           tracked_objects::TIME_SOURCE_TYPE_TCMALLOC);
 496     }
 497 #endif  // !OS_MACOSX && USE_TCMALLOC
 498
 499 #if !defined(OS_IOS)
 500     base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance();
 501 #endif
 502
 503     // On Android,
 504     // - setlocale() is not supported.
 505     // - We do not override the signal handlers so that we can get
 506     //   stack trace when crashing.
 507     // - The ipc_fd is passed through the Java service.
 508     // Thus, these are all disabled.
 509 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 510     // Set C library locale to make sure CommandLine can parse argument values
 511     // in correct encoding.
 512     setlocale(LC_ALL, "");
 513
 514     SetupSignalHandlers();
 515     g_fds->Set(kPrimaryIPCChannel,
 516                kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor);
 517 #endif  // !OS_ANDROID && !OS_IOS
 518
 519 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 520     g_fds->Set(kCrashDumpSignal,
 521                kCrashDumpSignal + base::GlobalDescriptors::kBaseDescriptor);
 522 #endif  // OS_LINUX || OS_OPENBSD
 523
 524
 525 #endif  // !OS_WIN
 526
 527     is_initialized_ = true;
 528     delegate_ = params.delegate;
 529
 530     // The exit manager is in charge of calling the dtors of singleton objects.
 531     // On Android, AtExitManager is set up when library is loaded.
 532     // On iOS, it's set up in main(), which can't call directly through to here.
 533     // A consequence of this is that you can't use the ctor/dtor-based
 534     // TRACE_EVENT methods on Linux or iOS builds till after we set this up.
 535 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 536     if (!ui_task_) {
 537       // When running browser tests, don't create a second AtExitManager as that
 538       // interfers with shutdown when objects created before ContentMain is
 539       // called are destructed when it returns.
 540       exit_manager_.reset(new base::AtExitManager);
 541     }
 542 #endif  // !OS_ANDROID && !OS_IOS
 543
 544     // Don't create this loop on iOS, since the outer loop is already handled
 545     // and a loop that's destroyed in shutdown interleaves badly with the event
 546     // loop pool on iOS.
 547 #if defined(OS_MACOSX) && !defined(OS_IOS)
 548     // We need this pool for all the objects created before we get to the
 549     // event loop, but we don't want to leave them hanging around until the
 550     // app quits. Each "main" needs to flush this pool right before it goes into
 551     // its main event loop to get rid of the cruft.
 552     autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
 553 #endif
 554
 555     // On Android, the command line is initialized when library is loaded and
 556     // we have already started our TRACE_EVENT0.
 557 #if !defined(OS_ANDROID)
 558     // argc/argv are ignored on Windows and Android; see command_line.h for
 559     // details.
 560     int argc = 0;
 561     const char** argv = NULL;
 562
 563 #if !defined(OS_WIN)
 564     argc = params.argc;
 565     argv = params.argv;
 566 #endif
 567
 568     base::CommandLine::Init(argc, argv);
 569
 570     base::EnableTerminationOnHeapCorruption();
 571
 572     // TODO(yiyaoliu, vadimt): Remove this once crbug.com/453640 is fixed.
 573     // Enable profiler recording right after command line is initialized so that
 574     // browser startup can be instrumented.
 575     if (delegate_ && delegate_->ShouldEnableProfilerRecording())
 576       tracked_objects::ScopedTracker::Enable();
 577
 578 #if !defined(OS_IOS)
 579     SetProcessTitleFromCommandLine(argv);
 580 #endif
 581 #endif // !OS_ANDROID
 582
 583     int exit_code = 0;
 584     if (delegate_ && delegate_->BasicStartupComplete(&exit_code))
 585       return exit_code;
 586
 587     completed_basic_startup_ = true;
 588
 589     const base::CommandLine& command_line =
 590         *base::CommandLine::ForCurrentProcess();
 591     std::string process_type =
 592         command_line.GetSwitchValueASCII(switches::kProcessType);
 593
 594 #if !defined(OS_IOS)
 595     // Initialize mojo here so that services can be registered.
 596     InitializeMojo();
 597 #endif
 598
 599 #if defined(OS_WIN)
 600     bool init_device_scale_factor = true;
 601     if (command_line.HasSwitch(switches::kDeviceScaleFactor)) {
 602       std::string scale_factor_string = command_line.GetSwitchValueASCII(
 603           switches::kDeviceScaleFactor);
 604       double scale_factor = 0;
 605       if (base::StringToDouble(scale_factor_string, &scale_factor)) {
 606         init_device_scale_factor = false;
 607         gfx::InitDeviceScaleFactor(scale_factor);
 608       }
 609     }
 610     if (init_device_scale_factor)
 611       gfx::InitDeviceScaleFactor(gfx::GetDPIScale());
 612 #endif
 613
 614     if (!GetContentClient())
 615       SetContentClient(&empty_content_client_);
 616     ContentClientInitializer::Set(process_type, delegate_);
 617
 618 #if defined(OS_WIN)
 619     // Route stdio to parent console (if any) or create one.
 620     if (command_line.HasSwitch(switches::kEnableLogging))
 621       base::RouteStdioToConsole();
 622 #endif
 623
 624     // Enable startup tracing asap to avoid early TRACE_EVENT calls being
 625     // ignored.
 626     if (command_line.HasSwitch(switches::kTraceStartup)) {
 627       base::trace_event::CategoryFilter category_filter(
 628           command_line.GetSwitchValueASCII(switches::kTraceStartup));
 629       base::trace_event::TraceLog::GetInstance()->SetEnabled(
 630           category_filter,
 631           base::trace_event::TraceLog::RECORDING_MODE,
 632           base::trace_event::TraceOptions(
 633               base::trace_event::RECORD_UNTIL_FULL));
 634     }
 635 #if !defined(OS_ANDROID)
 636     // Android tracing started at the beginning of the method.
 637     // Other OSes have to wait till we get here in order for all the memory
 638     // management setup to be completed.
 639     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 640 #endif // !OS_ANDROID
 641
 642 #if defined(OS_MACOSX) && !defined(OS_IOS)
 643     // We need to allocate the IO Ports before the Sandbox is initialized or
 644     // the first instance of PowerMonitor is created.
 645     // It's important not to allocate the ports for processes which don't
 646     // register with the power monitor - see crbug.com/88867.
 647     if (process_type.empty() ||
 648         (delegate_ &&
 649          delegate_->ProcessRegistersWithSystemProcess(process_type))) {
 650       base::PowerMonitorDeviceSource::AllocateSystemIOPorts();
 651     }
 652
 653     if (!process_type.empty() &&
 654         (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
 655       MachBroker::ChildSendTaskPortToParent();
 656     }
 657 #elif defined(OS_WIN)
 658     SetupCRT(command_line);
 659 #endif
 660
 661 #if defined(OS_POSIX)
 662     if (!process_type.empty()) {
 663       // When you hit Ctrl-C in a terminal running the browser
 664       // process, a SIGINT is delivered to the entire process group.
 665       // When debugging the browser process via gdb, gdb catches the
 666       // SIGINT for the browser process (and dumps you back to the gdb
 667       // console) but doesn't for the child processes, killing them.
 668       // The fix is to have child processes ignore SIGINT; they'll die
 669       // on their own when the browser process goes away.
 670       //
 671       // Note that we *can't* rely on BeingDebugged to catch this case because
 672       // we are the child process, which is not being debugged.
 673       // TODO(evanm): move this to some shared subprocess-init function.
 674       if (!base::debug::BeingDebugged())
 675         signal(SIGINT, SIG_IGN);
 676     }
 677 #endif
 678
 679 #if defined(USE_NSS)
 680     crypto::EarlySetupForNSSInit();
 681 #endif
 682
 683     ui::RegisterPathProvider();
 684     RegisterPathProvider();
 685     RegisterContentSchemes(true);
 686
 687 #if defined(OS_ANDROID)
 688     int icudata_fd = g_fds->MaybeGet(kAndroidICUDataDescriptor);
 689     if (icudata_fd != -1) {
 690       auto icudata_region = g_fds->GetRegion(kAndroidICUDataDescriptor);
 691       CHECK(base::i18n::InitializeICUWithFileDescriptor(icudata_fd,
 692                                                         icudata_region));
 693     } else {
 694       CHECK(base::i18n::InitializeICU());
 695     }
 696 #else
 697     CHECK(base::i18n::InitializeICU());
 698 #endif  // OS_ANDROID
 699
 700 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
 701 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 702 #if !defined(OS_ANDROID)
 703     // kV8NativesDataDescriptor and kV8SnapshotDataDescriptor are shared with
 704     // child processes. On Android they are set in
 705     // ChildProcessService::InternalInitChildProcess, otherwise set them here.
 706     if (!process_type.empty() && process_type != switches::kZygoteProcess) {
 707       g_fds->Set(
 708           kV8NativesDataDescriptor,
 709           kV8NativesDataDescriptor + base::GlobalDescriptors::kBaseDescriptor);
 710       g_fds->Set(
 711           kV8SnapshotDataDescriptor,
 712           kV8SnapshotDataDescriptor + base::GlobalDescriptors::kBaseDescriptor);
 713     }
 714 #endif  // !OS_ANDROID
 715     int v8_natives_fd = g_fds->MaybeGet(kV8NativesDataDescriptor);
 716     int v8_snapshot_fd = g_fds->MaybeGet(kV8SnapshotDataDescriptor);
 717     if (v8_natives_fd != -1 && v8_snapshot_fd != -1) {
 718       auto v8_natives_region = g_fds->GetRegion(kV8NativesDataDescriptor);
 719       auto v8_snapshot_region = g_fds->GetRegion(kV8SnapshotDataDescriptor);
 720       CHECK(gin::IsolateHolder::LoadV8SnapshotFd(
 721           v8_natives_fd, v8_natives_region.offset, v8_natives_region.size,
 722           v8_snapshot_fd, v8_snapshot_region.offset, v8_snapshot_region.size));
 723     } else {
 724       CHECK(gin::IsolateHolder::LoadV8Snapshot());
 725     }
 726 #else
 727     CHECK(gin::IsolateHolder::LoadV8Snapshot());
 728 #endif  // OS_POSIX && !OS_MACOSX
 729 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 730
 731     if (delegate_)
 732       delegate_->PreSandboxStartup();
 733
 734     if (!process_type.empty())
 735       CommonSubprocessInit(process_type);
 736
 737 #if defined(OS_WIN)
 738     CHECK(InitializeSandbox(params.sandbox_info));
 739 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 740     if (process_type == switches::kRendererProcess ||
 741         process_type == switches::kPpapiPluginProcess ||
 742         (delegate_ && delegate_->DelaySandboxInitialization(process_type))) {
 743       // On OS X the renderer sandbox needs to be initialized later in the
 744       // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
 745     } else {
 746       CHECK(InitializeSandbox());
 747     }
 748 #endif
 749
 750     if (delegate_)
 751       delegate_->SandboxInitialized(process_type);
 752
 753     // Return -1 to indicate no early termination.
 754     return -1;
 755   }
 756
 757   int Run() override {
 758     DCHECK(is_initialized_);
 759     DCHECK(!is_shutdown_);
 760     const base::CommandLine& command_line =
 761         *base::CommandLine::ForCurrentProcess();
 762     std::string process_type =
 763         command_line.GetSwitchValueASCII(switches::kProcessType);
 764
 765     MainFunctionParams main_params(command_line);
 766     main_params.ui_task = ui_task_;
 767 #if defined(OS_WIN)
 768     main_params.sandbox_info = &sandbox_info_;
 769 #elif defined(OS_MACOSX)
 770     main_params.autorelease_pool = autorelease_pool_.get();
 771 #endif
 772
 773 #if !defined(OS_IOS)
 774     return RunNamedProcessTypeMain(process_type, main_params, delegate_);
 775 #else
 776     return 1;
 777 #endif
 778   }
 779
 780   void Shutdown() override {
 781     DCHECK(is_initialized_);
 782     DCHECK(!is_shutdown_);
 783
 784     if (completed_basic_startup_ && delegate_) {
 785       const base::CommandLine& command_line =
 786           *base::CommandLine::ForCurrentProcess();
 787       std::string process_type =
 788           command_line.GetSwitchValueASCII(switches::kProcessType);
 789
 790       delegate_->ProcessExiting(process_type);
 791     }
 792
 793 #if defined(OS_WIN)
 794 #ifdef _CRTDBG_MAP_ALLOC
 795     _CrtDumpMemoryLeaks();
 796 #endif  // _CRTDBG_MAP_ALLOC
 797 #endif  // OS_WIN
 798
 799 #if defined(OS_MACOSX) && !defined(OS_IOS)
 800     autorelease_pool_.reset(NULL);
 801 #endif
 802
 803     exit_manager_.reset(NULL);
 804
 805     delegate_ = NULL;
 806     is_shutdown_ = true;
 807   }
 808
 809  private:
 810   // True if the runner has been initialized.
 811   bool is_initialized_;
 812
 813   // True if the runner has been shut down.
 814   bool is_shutdown_;
 815
 816   // True if basic startup was completed.
 817   bool completed_basic_startup_;
 818
 819   // Used if the embedder doesn't set one.
 820   ContentClient empty_content_client_;
 821
 822   // The delegate will outlive this object.
 823   ContentMainDelegate* delegate_;
 824
 825   scoped_ptr<base::AtExitManager> exit_manager_;
 826 #if defined(OS_WIN)
 827   sandbox::SandboxInterfaceInfo sandbox_info_;
 828 #elif defined(OS_MACOSX)
 829   scoped_ptr<base::mac::ScopedNSAutoreleasePool> autorelease_pool_;
 830 #endif
 831
 832   base::Closure* ui_task_;
 833
 834   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 835 };
 836
 837 // static
 838 ContentMainRunner* ContentMainRunner::Create() {
 839   return new ContentMainRunnerImpl();
 840 }
 841
 842 }  // namespace content