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