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