src/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 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
  54 #include "gin/public/isolate_holder.h"
  55 #endif
  56
  57 #if defined(OS_ANDROID)
  58 #include "content/public/common/content_descriptors.h"
  59 #endif
  60
  61 #if defined(USE_TCMALLOC)
  62 #include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
  63 #if defined(TYPE_PROFILING)
  64 #include "base/allocator/type_profiler.h"
  65 #include "base/allocator/type_profiler_tcmalloc.h"
  66 #endif
  67 #endif
  68
  69 #if !defined(OS_IOS)
  70 #include "content/app/mojo/mojo_init.h"
  71 #include "content/browser/gpu/gpu_process_host.h"
  72 #include "content/browser/renderer_host/render_process_host_impl.h"
  73 #include "content/browser/utility_process_host_impl.h"
  74 #include "content/public/plugin/content_plugin_client.h"
  75 #include "content/public/renderer/content_renderer_client.h"
  76 #include "content/public/utility/content_utility_client.h"
  77 #endif
  78
  79 #if defined(OS_WIN)
  80 #include <malloc.h>
  81 #include <cstring>
  82
  83 #include "base/strings/string_number_conversions.h"
  84 #include "ui/base/win/atl_module.h"
  85 #include "ui/gfx/win/dpi.h"
  86 #elif defined(OS_MACOSX)
  87 #include "base/mac/scoped_nsautorelease_pool.h"
  88 #if !defined(OS_IOS)
  89 #include "base/power_monitor/power_monitor_device_source.h"
  90 #include "content/browser/mach_broker_mac.h"
  91 #include "content/common/sandbox_init_mac.h"
  92 #endif  // !OS_IOS
  93 #endif  // OS_WIN
  94
  95 #if defined(OS_POSIX)
  96 #include <signal.h>
  97
  98 #include "base/posix/global_descriptors.h"
  99 #include "content/public/common/content_descriptors.h"
 100
 101 #if !defined(OS_MACOSX)
 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 static void InitializeStatsTable(const base::CommandLine& command_line) {
 215   // Initialize the Stats Counters table.  With this initialized,
 216   // the StatsViewer can be utilized to read counters outside of
 217   // Chrome.  These lines can be commented out to effectively turn
 218   // counters 'off'.  The table is created and exists for the life
 219   // of the process.  It is not cleaned up.
 220   if (command_line.HasSwitch(switches::kEnableStatsTable)) {
 221     // NOTIMPLEMENTED: we probably need to shut this down correctly to avoid
 222     // leaking shared memory regions on posix platforms.
 223 #if defined(OS_POSIX)
 224     // Stats table is in the global file descriptors table on Posix.
 225     base::GlobalDescriptors* global_descriptors =
 226         base::GlobalDescriptors::GetInstance();
 227     base::FileDescriptor table_ident;
 228     if (global_descriptors->MaybeGet(kStatsTableSharedMemFd) != -1) {
 229       // Open the shared memory file descriptor passed by the browser process.
 230       table_ident = base::FileDescriptor(
 231           global_descriptors->Get(kStatsTableSharedMemFd), false);
 232     }
 233 #elif defined(OS_WIN)
 234     // Stats table is in a named segment on Windows. Use the PID to make this
 235     // unique on the system.
 236     std::string table_ident =
 237       base::StringPrintf("%s-%u", kStatsFilename,
 238           static_cast<unsigned int>(GetBrowserPid(command_line)));
 239 #endif
 240     base::StatsTable* stats_table =
 241         new base::StatsTable(table_ident, kStatsMaxThreads, kStatsMaxCounters);
 242     base::StatsTable::set_current(stats_table);
 243   }
 244 }
 245
 246 class ContentClientInitializer {
 247  public:
 248   static void Set(const std::string& process_type,
 249                   ContentMainDelegate* delegate) {
 250     ContentClient* content_client = GetContentClient();
 251 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 252     if (process_type.empty()) {
 253       if (delegate)
 254         content_client->browser_ = delegate->CreateContentBrowserClient();
 255       if (!content_client->browser_)
 256         content_client->browser_ = &g_empty_content_browser_client.Get();
 257     }
 258 #endif  // !CHROME_MULTIPLE_DLL_CHILD
 259
 260 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 261     if (process_type == switches::kPluginProcess ||
 262         process_type == switches::kPpapiPluginProcess) {
 263       if (delegate)
 264         content_client->plugin_ = delegate->CreateContentPluginClient();
 265       if (!content_client->plugin_)
 266         content_client->plugin_ = &g_empty_content_plugin_client.Get();
 267       // Single process not supported in split dll mode.
 268     } else if (process_type == switches::kRendererProcess ||
 269                base::CommandLine::ForCurrentProcess()->HasSwitch(
 270                    switches::kSingleProcess)) {
 271       if (delegate)
 272         content_client->renderer_ = delegate->CreateContentRendererClient();
 273       if (!content_client->renderer_)
 274         content_client->renderer_ = &g_empty_content_renderer_client.Get();
 275     }
 276
 277     if (process_type == switches::kUtilityProcess ||
 278         base::CommandLine::ForCurrentProcess()->HasSwitch(
 279             switches::kSingleProcess)) {
 280       if (delegate)
 281         content_client->utility_ = delegate->CreateContentUtilityClient();
 282       // TODO(scottmg): http://crbug.com/237249 Should be in _child.
 283       if (!content_client->utility_)
 284         content_client->utility_ = &g_empty_content_utility_client.Get();
 285     }
 286 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 287   }
 288 };
 289
 290 // We dispatch to a process-type-specific FooMain() based on a command-line
 291 // flag.  This struct is used to build a table of (flag, main function) pairs.
 292 struct MainFunction {
 293   const char* name;
 294   int (*function)(const MainFunctionParams&);
 295 };
 296
 297 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 298 // On platforms that use the zygote, we have a special subset of
 299 // subprocesses that are launched via the zygote.  This function
 300 // fills in some process-launching bits around ZygoteMain().
 301 // Returns the exit code of the subprocess.
 302 int RunZygote(const MainFunctionParams& main_function_params,
 303               ContentMainDelegate* delegate) {
 304   static const MainFunction kMainFunctions[] = {
 305     { switches::kRendererProcess,    RendererMain },
 306 #if defined(ENABLE_PLUGINS)
 307     { switches::kPpapiPluginProcess, PpapiPluginMain },
 308 #endif
 309     { switches::kUtilityProcess,     UtilityMain },
 310   };
 311
 312   ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
 313   if (delegate) {
 314     delegate->ZygoteStarting(&zygote_fork_delegates);
 315     // Each Renderer we spawn will re-attempt initialization of the media
 316     // libraries, at which point failure will be detected and handled, so
 317     // we do not need to cope with initialization failures here.
 318     base::FilePath media_path;
 319     if (PathService::Get(DIR_MEDIA_LIBS, &media_path))
 320       media::InitializeMediaLibrary(media_path);
 321   }
 322
 323   // This function call can return multiple times, once per fork().
 324   if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
 325     return 1;
 326
 327   if (delegate) delegate->ZygoteForked();
 328
 329   // Zygote::HandleForkRequest may have reallocated the command
 330   // line so update it here with the new version.
 331   const base::CommandLine& command_line =
 332       *base::CommandLine::ForCurrentProcess();
 333   std::string process_type =
 334       command_line.GetSwitchValueASCII(switches::kProcessType);
 335   ContentClientInitializer::Set(process_type, delegate);
 336
 337   // The StatsTable must be initialized in each process; we already
 338   // initialized for the browser process, now we need to initialize
 339   // within the new processes as well.
 340   InitializeStatsTable(command_line);
 341
 342   MainFunctionParams main_params(command_line);
 343   main_params.zygote_child = true;
 344
 345   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 346     if (process_type == kMainFunctions[i].name)
 347       return kMainFunctions[i].function(main_params);
 348   }
 349
 350   if (delegate)
 351     return delegate->RunProcess(process_type, main_params);
 352
 353   NOTREACHED() << "Unknown zygote process type: " << process_type;
 354   return 1;
 355 }
 356 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 357
 358 #if !defined(OS_IOS)
 359 static void RegisterMainThreadFactories() {
 360 #if !defined(CHROME_MULTIPLE_DLL_BROWSER) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 361   UtilityProcessHostImpl::RegisterUtilityMainThreadFactory(
 362       CreateInProcessUtilityThread);
 363   RenderProcessHostImpl::RegisterRendererMainThreadFactory(
 364       CreateInProcessRendererThread);
 365   GpuProcessHost::RegisterGpuMainThreadFactory(
 366       CreateInProcessGpuThread);
 367 #else
 368   base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
 369   if (command_line.HasSwitch(switches::kSingleProcess)) {
 370     LOG(FATAL) <<
 371         "--single-process is not supported in chrome multiple dll browser.";
 372   }
 373   if (command_line.HasSwitch(switches::kInProcessGPU)) {
 374     LOG(FATAL) <<
 375         "--in-process-gpu is not supported in chrome multiple dll browser.";
 376   }
 377 #endif  // !CHROME_MULTIPLE_DLL_BROWSER && !CHROME_MULTIPLE_DLL_CHILD
 378 }
 379
 380 // Run the FooMain() for a given process type.
 381 // If |process_type| is empty, runs BrowserMain().
 382 // Returns the exit code for this process.
 383 int RunNamedProcessTypeMain(
 384     const std::string& process_type,
 385     const MainFunctionParams& main_function_params,
 386     ContentMainDelegate* delegate) {
 387   static const MainFunction kMainFunctions[] = {
 388 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 389     { "",                            BrowserMain },
 390 #endif
 391 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 392 #if defined(ENABLE_PLUGINS)
 393 #if !defined(OS_LINUX)
 394     { switches::kPluginProcess,      PluginMain },
 395 #endif
 396     { switches::kPpapiPluginProcess, PpapiPluginMain },
 397     { switches::kPpapiBrokerProcess, PpapiBrokerMain },
 398 #endif  // ENABLE_PLUGINS
 399     { switches::kUtilityProcess,     UtilityMain },
 400     { switches::kRendererProcess,    RendererMain },
 401     { switches::kGpuProcess,         GpuMain },
 402 #endif  // !CHROME_MULTIPLE_DLL_BROWSER
 403   };
 404
 405   RegisterMainThreadFactories();
 406
 407   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 408     if (process_type == kMainFunctions[i].name) {
 409       if (delegate) {
 410         int exit_code = delegate->RunProcess(process_type,
 411             main_function_params);
 412 #if defined(OS_ANDROID)
 413         // In Android's browser process, the negative exit code doesn't mean the
 414         // default behavior should be used as the UI message loop is managed by
 415         // the Java and the browser process's default behavior is always
 416         // overridden.
 417         if (process_type.empty())
 418           return exit_code;
 419 #endif
 420         if (exit_code >= 0)
 421           return exit_code;
 422       }
 423       return kMainFunctions[i].function(main_function_params);
 424     }
 425   }
 426
 427 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 428   // Zygote startup is special -- see RunZygote comments above
 429   // for why we don't use ZygoteMain directly.
 430   if (process_type == switches::kZygoteProcess)
 431     return RunZygote(main_function_params, delegate);
 432 #endif
 433
 434   // If it's a process we don't know about, the embedder should know.
 435   if (delegate)
 436     return delegate->RunProcess(process_type, main_function_params);
 437
 438   NOTREACHED() << "Unknown process type: " << process_type;
 439   return 1;
 440 }
 441 #endif  // !OS_IOS
 442
 443 class ContentMainRunnerImpl : public ContentMainRunner {
 444  public:
 445   ContentMainRunnerImpl()
 446       : is_initialized_(false),
 447         is_shutdown_(false),
 448         completed_basic_startup_(false),
 449         delegate_(NULL),
 450         ui_task_(NULL) {
 451 #if defined(OS_WIN)
 452     memset(&sandbox_info_, 0, sizeof(sandbox_info_));
 453 #endif
 454   }
 455
 456   ~ContentMainRunnerImpl() override {
 457     if (is_initialized_ && !is_shutdown_)
 458       Shutdown();
 459   }
 460
 461 #if defined(USE_TCMALLOC)
 462   static bool GetAllocatorWasteSizeThunk(size_t* size) {
 463     size_t heap_size, allocated_bytes, unmapped_bytes;
 464     MallocExtension* ext = MallocExtension::instance();
 465     if (ext->GetNumericProperty("generic.heap_size", &heap_size) &&
 466         ext->GetNumericProperty("generic.current_allocated_bytes",
 467                                 &allocated_bytes) &&
 468         ext->GetNumericProperty("tcmalloc.pageheap_unmapped_bytes",
 469                                 &unmapped_bytes)) {
 470       *size = heap_size - allocated_bytes - unmapped_bytes;
 471       return true;
 472     }
 473     DCHECK(false);
 474     return false;
 475   }
 476
 477   static void GetStatsThunk(char* buffer, int buffer_length) {
 478     MallocExtension::instance()->GetStats(buffer, buffer_length);
 479   }
 480
 481   static void ReleaseFreeMemoryThunk() {
 482     MallocExtension::instance()->ReleaseFreeMemory();
 483   }
 484 #endif
 485
 486   int Initialize(const ContentMainParams& params) override {
 487     ui_task_ = params.ui_task;
 488
 489 #if defined(OS_WIN)
 490     RegisterInvalidParamHandler();
 491     ui::win::CreateATLModuleIfNeeded();
 492
 493     sandbox_info_ = *params.sandbox_info;
 494 #else  // !OS_WIN
 495
 496 #if defined(OS_ANDROID)
 497     // See note at the initialization of ExitManager, below; basically,
 498     // only Android builds have the ctor/dtor handlers set up to use
 499     // TRACE_EVENT right away.
 500     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 501 #endif  // OS_ANDROID
 502
 503     // NOTE(willchan): One might ask why these TCMalloc-related calls are done
 504     // here rather than in process_util_linux.cc with the definition of
 505     // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
 506     // dependency on TCMalloc.  Really, we ought to have our allocator shim code
 507     // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.
 508     // This works for now.
 509 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 510
 511 #if defined(TYPE_PROFILING)
 512     base::type_profiler::InterceptFunctions::SetFunctions(
 513         base::type_profiler::NewInterceptForTCMalloc,
 514         base::type_profiler::DeleteInterceptForTCMalloc);
 515 #endif
 516
 517     // For tcmalloc, we need to tell it to behave like new.
 518     tc_set_new_mode(1);
 519
 520     // On windows, we've already set these thunks up in _heap_init()
 521     base::allocator::SetGetAllocatorWasteSizeFunction(
 522         GetAllocatorWasteSizeThunk);
 523     base::allocator::SetGetStatsFunction(GetStatsThunk);
 524     base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
 525
 526     // Provide optional hook for monitoring allocation quantities on a
 527     // per-thread basis.  Only set the hook if the environment indicates this
 528     // needs to be enabled.
 529     const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
 530     if (profiling &&
 531         (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
 532       tracked_objects::SetAlternateTimeSource(
 533           MallocExtension::GetBytesAllocatedOnCurrentThread,
 534           tracked_objects::TIME_SOURCE_TYPE_TCMALLOC);
 535     }
 536 #endif  // !OS_MACOSX && USE_TCMALLOC
 537
 538     // On Android,
 539     // - setlocale() is not supported.
 540     // - We do not override the signal handlers so that we can get
 541     //   stack trace when crashing.
 542     // - The ipc_fd is passed through the Java service.
 543     // Thus, these are all disabled.
 544 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 545     // Set C library locale to make sure CommandLine can parse argument values
 546     // in correct encoding.
 547     setlocale(LC_ALL, "");
 548
 549     SetupSignalHandlers();
 550
 551     base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance();
 552     g_fds->Set(kPrimaryIPCChannel,
 553                kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor);
 554 #endif  // !OS_ANDROID && !OS_IOS
 555
 556 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 557     g_fds->Set(kCrashDumpSignal,
 558                kCrashDumpSignal + base::GlobalDescriptors::kBaseDescriptor);
 559 #endif
 560
 561 #endif  // !OS_WIN
 562
 563     is_initialized_ = true;
 564     delegate_ = params.delegate;
 565
 566     // The exit manager is in charge of calling the dtors of singleton objects.
 567     // On Android, AtExitManager is set up when library is loaded.
 568     // On iOS, it's set up in main(), which can't call directly through to here.
 569     // A consequence of this is that you can't use the ctor/dtor-based
 570     // TRACE_EVENT methods on Linux or iOS builds till after we set this up.
 571 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 572     if (!ui_task_) {
 573       // When running browser tests, don't create a second AtExitManager as that
 574       // interfers with shutdown when objects created before ContentMain is
 575       // called are destructed when it returns.
 576       exit_manager_.reset(new base::AtExitManager);
 577     }
 578 #endif  // !OS_ANDROID && !OS_IOS
 579
 580 #if defined(OS_MACOSX)
 581     // We need this pool for all the objects created before we get to the
 582     // event loop, but we don't want to leave them hanging around until the
 583     // app quits. Each "main" needs to flush this pool right before it goes into
 584     // its main event loop to get rid of the cruft.
 585     autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
 586 #endif
 587
 588     // On Android, the command line is initialized when library is loaded and
 589     // we have already started our TRACE_EVENT0.
 590 #if !defined(OS_ANDROID)
 591     // argc/argv are ignored on Windows and Android; see command_line.h for
 592     // details.
 593     int argc = 0;
 594     const char** argv = NULL;
 595
 596 #if !defined(OS_WIN)
 597     argc = params.argc;
 598     argv = params.argv;
 599 #endif
 600
 601     base::CommandLine::Init(argc, argv);
 602
 603     if (!delegate_ || delegate_->ShouldEnableTerminationOnHeapCorruption())
 604       base::EnableTerminationOnHeapCorruption();
 605     base::EnableTerminationOnOutOfMemory();
 606
 607 #if !defined(OS_IOS)
 608     SetProcessTitleFromCommandLine(argv);
 609 #endif
 610 #endif // !OS_ANDROID
 611
 612     int exit_code = 0;
 613     if (delegate_ && delegate_->BasicStartupComplete(&exit_code))
 614       return exit_code;
 615
 616     completed_basic_startup_ = true;
 617
 618     const base::CommandLine& command_line =
 619         *base::CommandLine::ForCurrentProcess();
 620     std::string process_type =
 621         command_line.GetSwitchValueASCII(switches::kProcessType);
 622
 623 #if !defined(OS_IOS)
 624     // Initialize mojo here so that services can be registered.
 625     InitializeMojo();
 626 #endif
 627
 628 #if defined(OS_WIN)
 629     bool init_device_scale_factor = true;
 630     if (command_line.HasSwitch(switches::kDeviceScaleFactor)) {
 631       std::string scale_factor_string = command_line.GetSwitchValueASCII(
 632           switches::kDeviceScaleFactor);
 633       double scale_factor = 0;
 634       if (base::StringToDouble(scale_factor_string, &scale_factor)) {
 635         init_device_scale_factor = false;
 636         gfx::InitDeviceScaleFactor(scale_factor);
 637       }
 638     }
 639     if (init_device_scale_factor)
 640       gfx::InitDeviceScaleFactor(gfx::GetDPIScale());
 641 #endif
 642
 643     if (!GetContentClient())
 644       SetContentClient(&empty_content_client_);
 645     ContentClientInitializer::Set(process_type, delegate_);
 646
 647 #if defined(OS_WIN)
 648     // Route stdio to parent console (if any) or create one.
 649     if (command_line.HasSwitch(switches::kEnableLogging))
 650       base::RouteStdioToConsole();
 651 #endif
 652
 653     // Enable startup tracing asap to avoid early TRACE_EVENT calls being
 654     // ignored.
 655     if (command_line.HasSwitch(switches::kTraceStartup)) {
 656       base::debug::CategoryFilter category_filter(
 657           command_line.GetSwitchValueASCII(switches::kTraceStartup));
 658       base::debug::TraceLog::GetInstance()->SetEnabled(
 659           category_filter,
 660           base::debug::TraceLog::RECORDING_MODE,
 661           base::debug::TraceOptions(
 662               base::debug::RECORD_UNTIL_FULL));
 663     }
 664 #if !defined(OS_ANDROID)
 665     // Android tracing started at the beginning of the method.
 666     // Other OSes have to wait till we get here in order for all the memory
 667     // management setup to be completed.
 668     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 669 #endif // !OS_ANDROID
 670
 671 #if defined(OS_MACOSX) && !defined(OS_IOS)
 672     // We need to allocate the IO Ports before the Sandbox is initialized or
 673     // the first instance of PowerMonitor is created.
 674     // It's important not to allocate the ports for processes which don't
 675     // register with the power monitor - see crbug.com/88867.
 676     if (process_type.empty() ||
 677         (delegate_ &&
 678          delegate_->ProcessRegistersWithSystemProcess(process_type))) {
 679       base::PowerMonitorDeviceSource::AllocateSystemIOPorts();
 680     }
 681
 682     if (!process_type.empty() &&
 683         (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
 684       MachBroker::ChildSendTaskPortToParent();
 685     }
 686 #elif defined(OS_WIN)
 687     SetupCRT(command_line);
 688 #endif
 689
 690 #if defined(OS_POSIX)
 691     if (!process_type.empty()) {
 692       // When you hit Ctrl-C in a terminal running the browser
 693       // process, a SIGINT is delivered to the entire process group.
 694       // When debugging the browser process via gdb, gdb catches the
 695       // SIGINT for the browser process (and dumps you back to the gdb
 696       // console) but doesn't for the child processes, killing them.
 697       // The fix is to have child processes ignore SIGINT; they'll die
 698       // on their own when the browser process goes away.
 699       //
 700       // Note that we *can't* rely on BeingDebugged to catch this case because
 701       // we are the child process, which is not being debugged.
 702       // TODO(evanm): move this to some shared subprocess-init function.
 703       if (!base::debug::BeingDebugged())
 704         signal(SIGINT, SIG_IGN);
 705     }
 706 #endif
 707
 708 #if defined(USE_NSS)
 709     crypto::EarlySetupForNSSInit();
 710 #endif
 711
 712     ui::RegisterPathProvider();
 713     RegisterPathProvider();
 714     RegisterContentSchemes(true);
 715
 716 #if defined(OS_ANDROID)
 717     int icudata_fd = base::GlobalDescriptors::GetInstance()->MaybeGet(
 718         kAndroidICUDataDescriptor);
 719     if (icudata_fd != -1)
 720       CHECK(base::i18n::InitializeICUWithFileDescriptor(icudata_fd));
 721     else
 722       CHECK(base::i18n::InitializeICU());
 723
 724 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
 725     int v8_natives_fd = base::GlobalDescriptors::GetInstance()->MaybeGet(
 726         kV8NativesDataDescriptor);
 727     int v8_snapshot_fd = base::GlobalDescriptors::GetInstance()->MaybeGet(
 728         kV8SnapshotDataDescriptor);
 729     if (v8_natives_fd != -1 && v8_snapshot_fd != -1) {
 730       CHECK(gin::IsolateHolder::LoadV8SnapshotFD(v8_natives_fd,
 731                                                  v8_snapshot_fd));
 732     } else {
 733       CHECK(gin::IsolateHolder::LoadV8Snapshot());
 734     }
 735 #endif // V8_USE_EXTERNAL_STARTUP_DATA
 736
 737 #else
 738     CHECK(base::i18n::InitializeICU());
 739 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
 740     CHECK(gin::IsolateHolder::LoadV8Snapshot());
 741 #endif // V8_USE_EXTERNAL_STARTUP_DATA
 742 #endif // OS_ANDROID
 743
 744     InitializeStatsTable(command_line);
 745
 746     if (delegate_)
 747       delegate_->PreSandboxStartup();
 748
 749     if (!process_type.empty())
 750       CommonSubprocessInit(process_type);
 751
 752 #if defined(OS_WIN)
 753     CHECK(InitializeSandbox(params.sandbox_info));
 754 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 755     if (process_type == switches::kRendererProcess ||
 756         process_type == switches::kPpapiPluginProcess ||
 757         (delegate_ && delegate_->DelaySandboxInitialization(process_type))) {
 758       // On OS X the renderer sandbox needs to be initialized later in the
 759       // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
 760     } else {
 761       CHECK(InitializeSandbox());
 762     }
 763 #endif
 764
 765     if (delegate_)
 766       delegate_->SandboxInitialized(process_type);
 767
 768 #if defined(OS_TIZEN_MOBILE)
 769     if (process_type.empty())
 770       StoreArgvPointerAddress(argv);
 771     else
 772       SetProcessTitleFromCommandLine(argv);
 773 #elif defined(OS_POSIX) && !defined(OS_IOS) && !defined(OS_ANDROID)
 774     SetProcessTitleFromCommandLine(argv);
 775 #endif
 776
 777     // Return -1 to indicate no early termination.
 778     return -1;
 779   }
 780
 781   int Run() override {
 782     DCHECK(is_initialized_);
 783     DCHECK(!is_shutdown_);
 784     const base::CommandLine& command_line =
 785         *base::CommandLine::ForCurrentProcess();
 786     std::string process_type =
 787         command_line.GetSwitchValueASCII(switches::kProcessType);
 788
 789     MainFunctionParams main_params(command_line);
 790     main_params.ui_task = ui_task_;
 791 #if defined(OS_WIN)
 792     main_params.sandbox_info = &sandbox_info_;
 793 #elif defined(OS_MACOSX)
 794     main_params.autorelease_pool = autorelease_pool_.get();
 795 #endif
 796
 797 #if !defined(OS_IOS)
 798     return RunNamedProcessTypeMain(process_type, main_params, delegate_);
 799 #else
 800     return 1;
 801 #endif
 802   }
 803
 804   void Shutdown() override {
 805     DCHECK(is_initialized_);
 806     DCHECK(!is_shutdown_);
 807
 808     if (completed_basic_startup_ && delegate_) {
 809       const base::CommandLine& command_line =
 810           *base::CommandLine::ForCurrentProcess();
 811       std::string process_type =
 812           command_line.GetSwitchValueASCII(switches::kProcessType);
 813
 814       delegate_->ProcessExiting(process_type);
 815     }
 816
 817 #if defined(OS_WIN)
 818 #ifdef _CRTDBG_MAP_ALLOC
 819     _CrtDumpMemoryLeaks();
 820 #endif  // _CRTDBG_MAP_ALLOC
 821 #endif  // OS_WIN
 822
 823 #if defined(OS_MACOSX)
 824     autorelease_pool_.reset(NULL);
 825 #endif
 826
 827     exit_manager_.reset(NULL);
 828
 829     delegate_ = NULL;
 830     is_shutdown_ = true;
 831   }
 832
 833  private:
 834   // True if the runner has been initialized.
 835   bool is_initialized_;
 836
 837   // True if the runner has been shut down.
 838   bool is_shutdown_;
 839
 840   // True if basic startup was completed.
 841   bool completed_basic_startup_;
 842
 843   // Used if the embedder doesn't set one.
 844   ContentClient empty_content_client_;
 845
 846   // The delegate will outlive this object.
 847   ContentMainDelegate* delegate_;
 848
 849   scoped_ptr<base::AtExitManager> exit_manager_;
 850 #if defined(OS_WIN)
 851   sandbox::SandboxInterfaceInfo sandbox_info_;
 852 #elif defined(OS_MACOSX)
 853   scoped_ptr<base::mac::ScopedNSAutoreleasePool> autorelease_pool_;
 854 #endif
 855
 856   base::Closure* ui_task_;
 857
 858   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 859 };
 860
 861 // static
 862 ContentMainRunner* ContentMainRunner::Create() {
 863   return new ContentMainRunnerImpl();
 864 }
 865
 866 }  // namespace content