content/app/content_main_runner.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/public/app/content_main_runner.h"
   6
   7 #include <stdlib.h>
   8
   9 #include "base/allocator/allocator_extension.h"
  10 #include "base/at_exit.h"
  11 #include "base/command_line.h"
  12 #include "base/debug/debugger.h"
  13 #include "base/debug/trace_event.h"
  14 #include "base/files/file_path.h"
  15 #include "base/i18n/icu_util.h"
  16 #include "base/lazy_instance.h"
  17 #include "base/logging.h"
  18 #include "base/memory/scoped_ptr.h"
  19 #include "base/memory/scoped_vector.h"
  20 #include "base/metrics/stats_table.h"
  21 #include "base/path_service.h"
  22 #include "base/process/launch.h"
  23 #include "base/process/memory.h"
  24 #include "base/process/process_handle.h"
  25 #include "base/profiler/alternate_timer.h"
  26 #include "base/strings/string_number_conversions.h"
  27 #include "base/strings/string_util.h"
  28 #include "base/strings/stringprintf.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 #if defined(OS_ANDROID)
  54 #include "content/public/common/content_descriptors.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/base/win/dpi_setup.h"
  82 #include "ui/gfx/win/dpi.h"
  83 #elif defined(OS_MACOSX)
  84 #include "base/mac/scoped_nsautorelease_pool.h"
  85 #if !defined(OS_IOS)
  86 #include "base/power_monitor/power_monitor_device_source.h"
  87 #include "content/browser/mach_broker_mac.h"
  88 #include "content/common/sandbox_init_mac.h"
  89 #endif  // !OS_IOS
  90 #endif  // OS_WIN
  91
  92 #if defined(OS_POSIX)
  93 #include <signal.h>
  94
  95 #include "base/posix/global_descriptors.h"
  96 #include "content/public/common/content_descriptors.h"
  97
  98 #if !defined(OS_MACOSX)
  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 extern int WorkerMain(const MainFunctionParams&);
 125 }  // namespace content
 126
 127 namespace content {
 128
 129 base::LazyInstance<ContentBrowserClient>
 130     g_empty_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 131 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 132 base::LazyInstance<ContentPluginClient>
 133     g_empty_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 134 base::LazyInstance<ContentRendererClient>
 135     g_empty_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 136 base::LazyInstance<ContentUtilityClient>
 137     g_empty_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 138 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 139
 140 #if defined(OS_WIN)
 141
 142 #endif  // defined(OS_WIN)
 143
 144 #if defined(OS_POSIX) && !defined(OS_IOS)
 145
 146 // Setup signal-handling state: resanitize most signals, ignore SIGPIPE.
 147 void SetupSignalHandlers() {
 148   // Sanitise our signal handling state. Signals that were ignored by our
 149   // parent will also be ignored by us. We also inherit our parent's sigmask.
 150   sigset_t empty_signal_set;
 151   CHECK(0 == sigemptyset(&empty_signal_set));
 152   CHECK(0 == sigprocmask(SIG_SETMASK, &empty_signal_set, NULL));
 153
 154   struct sigaction sigact;
 155   memset(&sigact, 0, sizeof(sigact));
 156   sigact.sa_handler = SIG_DFL;
 157   static const int signals_to_reset[] =
 158       {SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV,
 159        SIGALRM, SIGTERM, SIGCHLD, SIGBUS, SIGTRAP};  // SIGPIPE is set below.
 160   for (unsigned i = 0; i < arraysize(signals_to_reset); i++) {
 161     CHECK(0 == sigaction(signals_to_reset[i], &sigact, NULL));
 162   }
 163
 164   // Always ignore SIGPIPE.  We check the return value of write().
 165   CHECK(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
 166 }
 167
 168 #endif  // OS_POSIX && !OS_IOS
 169
 170 void CommonSubprocessInit(const std::string& process_type) {
 171 #if defined(OS_WIN)
 172   // HACK: Let Windows know that we have started.  This is needed to suppress
 173   // the IDC_APPSTARTING cursor from being displayed for a prolonged period
 174   // while a subprocess is starting.
 175   PostThreadMessage(GetCurrentThreadId(), WM_NULL, 0, 0);
 176   MSG msg;
 177   PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
 178 #endif
 179 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 180   // Various things break when you're using a locale where the decimal
 181   // separator isn't a period.  See e.g. bugs 22782 and 39964.  For
 182   // all processes except the browser process (where we call system
 183   // APIs that may rely on the correct locale for formatting numbers
 184   // when presenting them to the user), reset the locale for numeric
 185   // formatting.
 186   // Note that this is not correct for plugin processes -- they can
 187   // surface UI -- but it's likely they get this wrong too so why not.
 188   setlocale(LC_NUMERIC, "C");
 189 #endif
 190 }
 191
 192 // Only needed on Windows for creating stats tables.
 193 #if defined(OS_WIN)
 194 static base::ProcessId GetBrowserPid(const CommandLine& command_line) {
 195   base::ProcessId browser_pid = base::GetCurrentProcId();
 196   if (command_line.HasSwitch(switches::kProcessChannelID)) {
 197     std::string channel_name =
 198         command_line.GetSwitchValueASCII(switches::kProcessChannelID);
 199
 200     int browser_pid_int;
 201     base::StringToInt(channel_name, &browser_pid_int);
 202     browser_pid = static_cast<base::ProcessId>(browser_pid_int);
 203     DCHECK_NE(browser_pid_int, 0);
 204   }
 205   return browser_pid;
 206 }
 207 #endif
 208
 209 static void InitializeStatsTable(const CommandLine& command_line) {
 210   // Initialize the Stats Counters table.  With this initialized,
 211   // the StatsViewer can be utilized to read counters outside of
 212   // Chrome.  These lines can be commented out to effectively turn
 213   // counters 'off'.  The table is created and exists for the life
 214   // of the process.  It is not cleaned up.
 215   if (command_line.HasSwitch(switches::kEnableStatsTable)) {
 216     // NOTIMPLEMENTED: we probably need to shut this down correctly to avoid
 217     // leaking shared memory regions on posix platforms.
 218 #if defined(OS_POSIX)
 219     // Stats table is in the global file descriptors table on Posix.
 220     base::GlobalDescriptors* global_descriptors =
 221         base::GlobalDescriptors::GetInstance();
 222     base::FileDescriptor table_ident;
 223     if (global_descriptors->MaybeGet(kStatsTableSharedMemFd) != -1) {
 224       // Open the shared memory file descriptor passed by the browser process.
 225       table_ident = base::FileDescriptor(
 226           global_descriptors->Get(kStatsTableSharedMemFd), false);
 227     }
 228 #elif defined(OS_WIN)
 229     // Stats table is in a named segment on Windows. Use the PID to make this
 230     // unique on the system.
 231     std::string table_ident =
 232       base::StringPrintf("%s-%u", kStatsFilename,
 233           static_cast<unsigned int>(GetBrowserPid(command_line)));
 234 #endif
 235     base::StatsTable* stats_table =
 236         new base::StatsTable(table_ident, kStatsMaxThreads, kStatsMaxCounters);
 237     base::StatsTable::set_current(stats_table);
 238   }
 239 }
 240
 241 class ContentClientInitializer {
 242  public:
 243   static void Set(const std::string& process_type,
 244                   ContentMainDelegate* delegate) {
 245     ContentClient* content_client = GetContentClient();
 246     if (process_type.empty()) {
 247       if (delegate)
 248         content_client->browser_ = delegate->CreateContentBrowserClient();
 249       if (!content_client->browser_)
 250         content_client->browser_ = &g_empty_content_browser_client.Get();
 251     }
 252
 253 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 254     if (process_type == switches::kPluginProcess ||
 255         process_type == switches::kPpapiPluginProcess) {
 256       if (delegate)
 257         content_client->plugin_ = delegate->CreateContentPluginClient();
 258       if (!content_client->plugin_)
 259         content_client->plugin_ = &g_empty_content_plugin_client.Get();
 260       // Single process not supported in split dll mode.
 261     } else if (process_type == switches::kRendererProcess ||
 262                CommandLine::ForCurrentProcess()->HasSwitch(
 263                    switches::kSingleProcess)) {
 264       if (delegate)
 265         content_client->renderer_ = delegate->CreateContentRendererClient();
 266       if (!content_client->renderer_)
 267         content_client->renderer_ = &g_empty_content_renderer_client.Get();
 268     }
 269
 270     if (process_type == switches::kUtilityProcess ||
 271         CommandLine::ForCurrentProcess()->HasSwitch(
 272             switches::kSingleProcess)) {
 273       if (delegate)
 274         content_client->utility_ = delegate->CreateContentUtilityClient();
 275       // TODO(scottmg): http://crbug.com/237249 Should be in _child.
 276       if (!content_client->utility_)
 277         content_client->utility_ = &g_empty_content_utility_client.Get();
 278     }
 279 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 280   }
 281 };
 282
 283 // We dispatch to a process-type-specific FooMain() based on a command-line
 284 // flag.  This struct is used to build a table of (flag, main function) pairs.
 285 struct MainFunction {
 286   const char* name;
 287   int (*function)(const MainFunctionParams&);
 288 };
 289
 290 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 291 // On platforms that use the zygote, we have a special subset of
 292 // subprocesses that are launched via the zygote.  This function
 293 // fills in some process-launching bits around ZygoteMain().
 294 // Returns the exit code of the subprocess.
 295 int RunZygote(const MainFunctionParams& main_function_params,
 296               ContentMainDelegate* delegate) {
 297   static const MainFunction kMainFunctions[] = {
 298     { switches::kRendererProcess,    RendererMain },
 299     { switches::kWorkerProcess,      WorkerMain },
 300 #if defined(ENABLE_PLUGINS)
 301     { switches::kPpapiPluginProcess, PpapiPluginMain },
 302 #endif
 303     { switches::kUtilityProcess,     UtilityMain },
 304   };
 305
 306   ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
 307   if (delegate) {
 308     delegate->ZygoteStarting(&zygote_fork_delegates);
 309     // Each Renderer we spawn will re-attempt initialization of the media
 310     // libraries, at which point failure will be detected and handled, so
 311     // we do not need to cope with initialization failures here.
 312     base::FilePath media_path;
 313     if (PathService::Get(DIR_MEDIA_LIBS, &media_path))
 314       media::InitializeMediaLibrary(media_path);
 315   }
 316
 317   // This function call can return multiple times, once per fork().
 318   if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
 319     return 1;
 320
 321   if (delegate) delegate->ZygoteForked();
 322
 323   // Zygote::HandleForkRequest may have reallocated the command
 324   // line so update it here with the new version.
 325   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 326   std::string process_type =
 327       command_line.GetSwitchValueASCII(switches::kProcessType);
 328   ContentClientInitializer::Set(process_type, delegate);
 329
 330   // The StatsTable must be initialized in each process; we already
 331   // initialized for the browser process, now we need to initialize
 332   // within the new processes as well.
 333   InitializeStatsTable(command_line);
 334
 335   MainFunctionParams main_params(command_line);
 336
 337   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 338     if (process_type == kMainFunctions[i].name)
 339       return kMainFunctions[i].function(main_params);
 340   }
 341
 342   if (delegate)
 343     return delegate->RunProcess(process_type, main_params);
 344
 345   NOTREACHED() << "Unknown zygote process type: " << process_type;
 346   return 1;
 347 }
 348 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 349
 350 #if !defined(OS_IOS)
 351 static void RegisterMainThreadFactories() {
 352 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 353   UtilityProcessHostImpl::RegisterUtilityMainThreadFactory(
 354       CreateInProcessUtilityThread);
 355   RenderProcessHostImpl::RegisterRendererMainThreadFactory(
 356       CreateInProcessRendererThread);
 357   GpuProcessHost::RegisterGpuMainThreadFactory(
 358       CreateInProcessGpuThread);
 359 #else
 360   CommandLine& command_line = *CommandLine::ForCurrentProcess();
 361   if (command_line.HasSwitch(switches::kSingleProcess)) {
 362     LOG(FATAL) <<
 363         "--single-process is not supported in chrome multiple dll browser.";
 364   }
 365   if (command_line.HasSwitch(switches::kInProcessGPU)) {
 366     LOG(FATAL) <<
 367         "--in-process-gpu is not supported in chrome multiple dll browser.";
 368   }
 369 #endif
 370 }
 371
 372 // Run the FooMain() for a given process type.
 373 // If |process_type| is empty, runs BrowserMain().
 374 // Returns the exit code for this process.
 375 int RunNamedProcessTypeMain(
 376     const std::string& process_type,
 377     const MainFunctionParams& main_function_params,
 378     ContentMainDelegate* delegate) {
 379   static const MainFunction kMainFunctions[] = {
 380 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 381     { "",                            BrowserMain },
 382 #endif
 383 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 384 #if defined(ENABLE_PLUGINS)
 385 #if !defined(OS_LINUX)
 386     { switches::kPluginProcess,      PluginMain },
 387 #endif
 388     { switches::kWorkerProcess,      WorkerMain },
 389     { switches::kPpapiPluginProcess, PpapiPluginMain },
 390     { switches::kPpapiBrokerProcess, PpapiBrokerMain },
 391 #endif  // ENABLE_PLUGINS
 392     { switches::kUtilityProcess,     UtilityMain },
 393     { switches::kRendererProcess,    RendererMain },
 394     { switches::kGpuProcess,         GpuMain },
 395 #endif  // !CHROME_MULTIPLE_DLL_BROWSER
 396   };
 397
 398   RegisterMainThreadFactories();
 399
 400   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 401     if (process_type == kMainFunctions[i].name) {
 402       if (delegate) {
 403         int exit_code = delegate->RunProcess(process_type,
 404             main_function_params);
 405 #if defined(OS_ANDROID)
 406         // In Android's browser process, the negative exit code doesn't mean the
 407         // default behavior should be used as the UI message loop is managed by
 408         // the Java and the browser process's default behavior is always
 409         // overridden.
 410         if (process_type.empty())
 411           return exit_code;
 412 #endif
 413         if (exit_code >= 0)
 414           return exit_code;
 415       }
 416       return kMainFunctions[i].function(main_function_params);
 417     }
 418   }
 419
 420 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 421   // Zygote startup is special -- see RunZygote comments above
 422   // for why we don't use ZygoteMain directly.
 423   if (process_type == switches::kZygoteProcess)
 424     return RunZygote(main_function_params, delegate);
 425 #endif
 426
 427   // If it's a process we don't know about, the embedder should know.
 428   if (delegate)
 429     return delegate->RunProcess(process_type, main_function_params);
 430
 431   NOTREACHED() << "Unknown process type: " << process_type;
 432   return 1;
 433 }
 434 #endif  // !OS_IOS
 435
 436 class ContentMainRunnerImpl : public ContentMainRunner {
 437  public:
 438   ContentMainRunnerImpl()
 439       : is_initialized_(false),
 440         is_shutdown_(false),
 441         completed_basic_startup_(false),
 442         delegate_(NULL),
 443         ui_task_(NULL) {
 444 #if defined(OS_WIN)
 445     memset(&sandbox_info_, 0, sizeof(sandbox_info_));
 446 #endif
 447   }
 448
 449   virtual ~ContentMainRunnerImpl() {
 450     if (is_initialized_ && !is_shutdown_)
 451       Shutdown();
 452   }
 453
 454 #if defined(USE_TCMALLOC)
 455   static bool GetAllocatorWasteSizeThunk(size_t* size) {
 456     size_t heap_size, allocated_bytes, unmapped_bytes;
 457     MallocExtension* ext = MallocExtension::instance();
 458     if (ext->GetNumericProperty("generic.heap_size", &heap_size) &&
 459         ext->GetNumericProperty("generic.current_allocated_bytes",
 460                                 &allocated_bytes) &&
 461         ext->GetNumericProperty("tcmalloc.pageheap_unmapped_bytes",
 462                                 &unmapped_bytes)) {
 463       *size = heap_size - allocated_bytes - unmapped_bytes;
 464       return true;
 465     }
 466     DCHECK(false);
 467     return false;
 468   }
 469
 470   static void GetStatsThunk(char* buffer, int buffer_length) {
 471     MallocExtension::instance()->GetStats(buffer, buffer_length);
 472   }
 473
 474   static void ReleaseFreeMemoryThunk() {
 475     MallocExtension::instance()->ReleaseFreeMemory();
 476   }
 477 #endif
 478
 479   virtual int Initialize(const ContentMainParams& params) OVERRIDE {
 480     ui_task_ = params.ui_task;
 481
 482 #if defined(OS_WIN)
 483     RegisterInvalidParamHandler();
 484     ui::win::CreateATLModuleIfNeeded();
 485
 486     sandbox_info_ = *params.sandbox_info;
 487 #else  // !OS_WIN
 488
 489 #if defined(OS_ANDROID)
 490     // See note at the initialization of ExitManager, below; basically,
 491     // only Android builds have the ctor/dtor handlers set up to use
 492     // TRACE_EVENT right away.
 493     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 494 #endif  // OS_ANDROID
 495
 496     // NOTE(willchan): One might ask why these TCMalloc-related calls are done
 497     // here rather than in process_util_linux.cc with the definition of
 498     // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
 499     // dependency on TCMalloc.  Really, we ought to have our allocator shim code
 500     // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.
 501     // This works for now.
 502 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 503
 504 #if defined(TYPE_PROFILING)
 505     base::type_profiler::InterceptFunctions::SetFunctions(
 506         base::type_profiler::NewInterceptForTCMalloc,
 507         base::type_profiler::DeleteInterceptForTCMalloc);
 508 #endif
 509
 510     // For tcmalloc, we need to tell it to behave like new.
 511     tc_set_new_mode(1);
 512
 513     // On windows, we've already set these thunks up in _heap_init()
 514     base::allocator::SetGetAllocatorWasteSizeFunction(
 515         GetAllocatorWasteSizeThunk);
 516     base::allocator::SetGetStatsFunction(GetStatsThunk);
 517     base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
 518
 519     // Provide optional hook for monitoring allocation quantities on a
 520     // per-thread basis.  Only set the hook if the environment indicates this
 521     // needs to be enabled.
 522     const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
 523     if (profiling &&
 524         (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
 525       tracked_objects::SetAlternateTimeSource(
 526           MallocExtension::GetBytesAllocatedOnCurrentThread,
 527           tracked_objects::TIME_SOURCE_TYPE_TCMALLOC);
 528     }
 529 #endif  // !OS_MACOSX && USE_TCMALLOC
 530
 531     // On Android,
 532     // - setlocale() is not supported.
 533     // - We do not override the signal handlers so that we can get
 534     //   stack trace when crashing.
 535     // - The ipc_fd is passed through the Java service.
 536     // Thus, these are all disabled.
 537 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 538     // Set C library locale to make sure CommandLine can parse argument values
 539     // in correct encoding.
 540     setlocale(LC_ALL, "");
 541
 542     SetupSignalHandlers();
 543
 544     base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance();
 545     g_fds->Set(kPrimaryIPCChannel,
 546                kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor);
 547 #endif  // !OS_ANDROID && !OS_IOS
 548
 549 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 550     g_fds->Set(kCrashDumpSignal,
 551                kCrashDumpSignal + base::GlobalDescriptors::kBaseDescriptor);
 552 #endif
 553
 554 #endif  // !OS_WIN
 555
 556     is_initialized_ = true;
 557     delegate_ = params.delegate;
 558
 559     base::EnableTerminationOnHeapCorruption();
 560     base::EnableTerminationOnOutOfMemory();
 561
 562     // The exit manager is in charge of calling the dtors of singleton objects.
 563     // On Android, AtExitManager is set up when library is loaded.
 564     // On iOS, it's set up in main(), which can't call directly through to here.
 565     // A consequence of this is that you can't use the ctor/dtor-based
 566     // TRACE_EVENT methods on Linux or iOS builds till after we set this up.
 567 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 568     if (!ui_task_) {
 569       // When running browser tests, don't create a second AtExitManager as that
 570       // interfers with shutdown when objects created before ContentMain is
 571       // called are destructed when it returns.
 572       exit_manager_.reset(new base::AtExitManager);
 573     }
 574 #endif  // !OS_ANDROID && !OS_IOS
 575
 576 #if defined(OS_MACOSX)
 577     // We need this pool for all the objects created before we get to the
 578     // event loop, but we don't want to leave them hanging around until the
 579     // app quits. Each "main" needs to flush this pool right before it goes into
 580     // its main event loop to get rid of the cruft.
 581     autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
 582 #endif
 583
 584     // On Android, the command line is initialized when library is loaded and
 585     // we have already started our TRACE_EVENT0.
 586 #if !defined(OS_ANDROID)
 587     // argc/argv are ignored on Windows and Android; see command_line.h for
 588     // details.
 589     int argc = 0;
 590     const char** argv = NULL;
 591
 592 #if !defined(OS_WIN)
 593     argc = params.argc;
 594     argv = params.argv;
 595 #endif
 596
 597     CommandLine::Init(argc, argv);
 598
 599 #if !defined(OS_IOS)
 600     SetProcessTitleFromCommandLine(argv);
 601 #endif
 602 #endif // !OS_ANDROID
 603
 604     int exit_code;
 605     if (delegate_ && delegate_->BasicStartupComplete(&exit_code))
 606       return exit_code;
 607
 608     completed_basic_startup_ = true;
 609
 610     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 611     std::string process_type =
 612         command_line.GetSwitchValueASCII(switches::kProcessType);
 613
 614 #if !defined(OS_IOS)
 615     // Initialize mojo here so that services can be registered.
 616     InitializeMojo();
 617 #endif
 618
 619     if (!GetContentClient())
 620       SetContentClient(&empty_content_client_);
 621     ContentClientInitializer::Set(process_type, delegate_);
 622
 623 #if defined(OS_WIN)
 624     // Route stdio to parent console (if any) or create one.
 625     if (command_line.HasSwitch(switches::kEnableLogging))
 626       base::RouteStdioToConsole();
 627 #endif
 628
 629     // Enable startup tracing asap to avoid early TRACE_EVENT calls being
 630     // ignored.
 631     if (command_line.HasSwitch(switches::kTraceStartup)) {
 632       base::debug::CategoryFilter category_filter(
 633           command_line.GetSwitchValueASCII(switches::kTraceStartup));
 634       base::debug::TraceLog::GetInstance()->SetEnabled(
 635           category_filter,
 636           base::debug::TraceLog::RECORDING_MODE,
 637           base::debug::TraceLog::RECORD_UNTIL_FULL);
 638     }
 639 #if !defined(OS_ANDROID)
 640     // Android tracing started at the beginning of the method.
 641     // Other OSes have to wait till we get here in order for all the memory
 642     // management setup to be completed.
 643     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 644 #endif // !OS_ANDROID
 645
 646 #if defined(OS_MACOSX) && !defined(OS_IOS)
 647     // We need to allocate the IO Ports before the Sandbox is initialized or
 648     // the first instance of PowerMonitor is created.
 649     // It's important not to allocate the ports for processes which don't
 650     // register with the power monitor - see crbug.com/88867.
 651     if (process_type.empty() ||
 652         (delegate_ &&
 653          delegate_->ProcessRegistersWithSystemProcess(process_type))) {
 654       base::PowerMonitorDeviceSource::AllocateSystemIOPorts();
 655     }
 656
 657     if (!process_type.empty() &&
 658         (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
 659       MachBroker::ChildSendTaskPortToParent();
 660     }
 661 #elif defined(OS_WIN)
 662     if (command_line.HasSwitch(switches::kEnableHighResolutionTime))
 663       base::TimeTicks::SetNowIsHighResNowIfSupported();
 664
 665     bool init_device_scale_factor = true;
 666     if (command_line.HasSwitch(switches::kDeviceScaleFactor)) {
 667       std::string scale_factor_string = command_line.GetSwitchValueASCII(
 668           switches::kDeviceScaleFactor);
 669       double scale_factor = 0;
 670       if (base::StringToDouble(scale_factor_string, &scale_factor)) {
 671         init_device_scale_factor = false;
 672         gfx::InitDeviceScaleFactor(scale_factor);
 673       }
 674     }
 675     if (init_device_scale_factor)
 676       ui::win::InitDeviceScaleFactor();
 677
 678     SetupCRT(command_line);
 679 #endif
 680
 681 #if defined(OS_POSIX)
 682     if (!process_type.empty()) {
 683       // When you hit Ctrl-C in a terminal running the browser
 684       // process, a SIGINT is delivered to the entire process group.
 685       // When debugging the browser process via gdb, gdb catches the
 686       // SIGINT for the browser process (and dumps you back to the gdb
 687       // console) but doesn't for the child processes, killing them.
 688       // The fix is to have child processes ignore SIGINT; they'll die
 689       // on their own when the browser process goes away.
 690       //
 691       // Note that we *can't* rely on BeingDebugged to catch this case because
 692       // we are the child process, which is not being debugged.
 693       // TODO(evanm): move this to some shared subprocess-init function.
 694       if (!base::debug::BeingDebugged())
 695         signal(SIGINT, SIG_IGN);
 696     }
 697 #endif
 698
 699 #if defined(USE_NSS)
 700     crypto::EarlySetupForNSSInit();
 701 #endif
 702
 703     ui::RegisterPathProvider();
 704     RegisterPathProvider();
 705     RegisterContentSchemes(true);
 706
 707 #if defined(OS_ANDROID)
 708     int icudata_fd = base::GlobalDescriptors::GetInstance()->MaybeGet(
 709         kAndroidICUDataDescriptor);
 710     if (icudata_fd != -1)
 711       CHECK(base::i18n::InitializeICUWithFileDescriptor(icudata_fd));
 712     else
 713       CHECK(base::i18n::InitializeICU());
 714 #else
 715     CHECK(base::i18n::InitializeICU());
 716 #endif
 717
 718     InitializeStatsTable(command_line);
 719
 720     if (delegate_)
 721       delegate_->PreSandboxStartup();
 722
 723     if (!process_type.empty())
 724       CommonSubprocessInit(process_type);
 725
 726 #if defined(OS_WIN)
 727     CHECK(InitializeSandbox(params.sandbox_info));
 728 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 729     if (process_type == switches::kRendererProcess ||
 730         process_type == switches::kPpapiPluginProcess ||
 731         (delegate_ && delegate_->DelaySandboxInitialization(process_type))) {
 732       // On OS X the renderer sandbox needs to be initialized later in the
 733       // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
 734     } else {
 735       CHECK(InitializeSandbox());
 736     }
 737 #endif
 738
 739     if (delegate_)
 740       delegate_->SandboxInitialized(process_type);
 741
 742     // Return -1 to indicate no early termination.
 743     return -1;
 744   }
 745
 746   virtual int Run() OVERRIDE {
 747     DCHECK(is_initialized_);
 748     DCHECK(!is_shutdown_);
 749     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 750     std::string process_type =
 751           command_line.GetSwitchValueASCII(switches::kProcessType);
 752
 753     MainFunctionParams main_params(command_line);
 754     main_params.ui_task = ui_task_;
 755 #if defined(OS_WIN)
 756     main_params.sandbox_info = &sandbox_info_;
 757 #elif defined(OS_MACOSX)
 758     main_params.autorelease_pool = autorelease_pool_.get();
 759 #endif
 760
 761 #if !defined(OS_IOS)
 762     return RunNamedProcessTypeMain(process_type, main_params, delegate_);
 763 #else
 764     return 1;
 765 #endif
 766   }
 767
 768   virtual void Shutdown() OVERRIDE {
 769     DCHECK(is_initialized_);
 770     DCHECK(!is_shutdown_);
 771
 772     if (completed_basic_startup_ && delegate_) {
 773       const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 774       std::string process_type =
 775           command_line.GetSwitchValueASCII(switches::kProcessType);
 776
 777       delegate_->ProcessExiting(process_type);
 778     }
 779
 780 #if defined(OS_WIN)
 781 #ifdef _CRTDBG_MAP_ALLOC
 782     _CrtDumpMemoryLeaks();
 783 #endif  // _CRTDBG_MAP_ALLOC
 784 #endif  // OS_WIN
 785
 786 #if defined(OS_MACOSX)
 787     autorelease_pool_.reset(NULL);
 788 #endif
 789
 790     exit_manager_.reset(NULL);
 791
 792     delegate_ = NULL;
 793     is_shutdown_ = true;
 794   }
 795
 796  private:
 797   // True if the runner has been initialized.
 798   bool is_initialized_;
 799
 800   // True if the runner has been shut down.
 801   bool is_shutdown_;
 802
 803   // True if basic startup was completed.
 804   bool completed_basic_startup_;
 805
 806   // Used if the embedder doesn't set one.
 807   ContentClient empty_content_client_;
 808
 809   // The delegate will outlive this object.
 810   ContentMainDelegate* delegate_;
 811
 812   scoped_ptr<base::AtExitManager> exit_manager_;
 813 #if defined(OS_WIN)
 814   sandbox::SandboxInterfaceInfo sandbox_info_;
 815 #elif defined(OS_MACOSX)
 816   scoped_ptr<base::mac::ScopedNSAutoreleasePool> autorelease_pool_;
 817 #endif
 818
 819   base::Closure* ui_task_;
 820
 821   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 822 };
 823
 824 // static
 825 ContentMainRunner* ContentMainRunner::Create() {
 826   return new ContentMainRunnerImpl();
 827 }
 828
 829 }  // namespace content