chrome/app/chrome_main_delegate.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 "chrome/app/chrome_main_delegate.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/cpu.h"
   9 #include "base/files/file_path.h"
  10 #include "base/i18n/rtl.h"
  11 #include "base/lazy_instance.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/metrics/statistics_recorder.h"
  14 #include "base/metrics/stats_counters.h"
  15 #include "base/path_service.h"
  16 #include "base/process/memory.h"
  17 #include "base/process/process_handle.h"
  18 #include "base/strings/string_util.h"
  19 #include "build/build_config.h"
  20 #include "chrome/browser/chrome_content_browser_client.h"
  21 #include "chrome/browser/defaults.h"
  22 #include "chrome/common/chrome_constants.h"
  23 #include "chrome/common/chrome_content_client.h"
  24 #include "chrome/common/chrome_paths.h"
  25 #include "chrome/common/chrome_paths_internal.h"
  26 #include "chrome/common/chrome_switches.h"
  27 #include "chrome/common/chrome_version_info.h"
  28 #include "chrome/common/crash_keys.h"
  29 #include "chrome/common/logging_chrome.h"
  30 #include "chrome/common/profiling.h"
  31 #include "chrome/common/switch_utils.h"
  32 #include "chrome/common/url_constants.h"
  33 #include "chrome/plugin/chrome_content_plugin_client.h"
  34 #include "chrome/renderer/chrome_content_renderer_client.h"
  35 #include "chrome/utility/chrome_content_utility_client.h"
  36 #include "components/nacl/common/nacl_switches.h"
  37 #include "components/startup_metric_utils/startup_metric_utils.h"
  38 #include "content/public/common/content_client.h"
  39 #include "content/public/common/content_paths.h"
  40 #include "ui/base/ui_base_switches.h"
  41
  42 #if defined(OS_WIN)
  43 #include <atlbase.h>
  44 #include <malloc.h>
  45 #include <algorithm>
  46 #include "base/strings/string_util.h"
  47 #include "chrome/common/child_process_logging.h"
  48 #include "sandbox/win/src/sandbox.h"
  49 #include "tools/memory_watcher/memory_watcher.h"
  50 #include "ui/base/resource/resource_bundle_win.h"
  51 #endif
  52
  53 #if defined(OS_MACOSX)
  54 #include "base/mac/mac_util.h"
  55 #include "base/mac/os_crash_dumps.h"
  56 #include "chrome/app/chrome_main_mac.h"
  57 #include "chrome/browser/mac/relauncher.h"
  58 #include "chrome/common/chrome_paths_internal.h"
  59 #include "chrome/common/mac/cfbundle_blocker.h"
  60 #include "chrome/common/mac/objc_zombie.h"
  61 #include "components/breakpad/app/breakpad_mac.h"
  62 #include "grit/chromium_strings.h"
  63 #include "ui/base/l10n/l10n_util_mac.h"
  64 #endif
  65
  66 #if defined(OS_POSIX)
  67 #include <locale.h>
  68 #include <signal.h>
  69 #include "chrome/app/chrome_breakpad_client.h"
  70 #include "components/breakpad/app/breakpad_client.h"
  71 #endif
  72
  73 #if !defined(DISABLE_NACL) && defined(OS_LINUX)
  74 #include "components/nacl/common/nacl_paths.h"
  75 #include "components/nacl/zygote/nacl_fork_delegate_linux.h"
  76 #endif
  77
  78 #if defined(OS_CHROMEOS)
  79 #include "base/sys_info.h"
  80 #include "chrome/browser/chromeos/boot_times_loader.h"
  81 #include "chromeos/chromeos_paths.h"
  82 #include "chromeos/chromeos_switches.h"
  83 #endif
  84
  85 #if defined(OS_ANDROID)
  86 #include "chrome/common/descriptors_android.h"
  87 #else
  88 // Diagnostics is only available on non-android platforms.
  89 #include "chrome/browser/diagnostics/diagnostics_controller.h"
  90 #include "chrome/browser/diagnostics/diagnostics_writer.h"
  91 #endif
  92
  93 #if defined(USE_X11)
  94 #include <stdlib.h>
  95 #include <string.h>
  96 #include "ui/base/x/x11_util.h"
  97 #endif
  98
  99 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 100 #include "components/breakpad/app/breakpad_linux.h"
 101 #endif
 102
 103 #if defined(OS_LINUX)
 104 #include "base/environment.h"
 105 #endif
 106
 107 #if defined(OS_MACOSX) || defined(OS_WIN)
 108 #include "chrome/browser/policy/policy_path_parser.h"
 109 #endif
 110
 111 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 112 base::LazyInstance<chrome::ChromeContentBrowserClient>
 113     g_chrome_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 114 #endif
 115
 116 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 117 base::LazyInstance<ChromeContentRendererClient>
 118     g_chrome_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 119 base::LazyInstance<chrome::ChromeContentUtilityClient>
 120     g_chrome_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 121 base::LazyInstance<chrome::ChromeContentPluginClient>
 122     g_chrome_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 123 #endif
 124
 125 #if defined(OS_POSIX)
 126 base::LazyInstance<chrome::ChromeBreakpadClient>::Leaky
 127     g_chrome_breakpad_client = LAZY_INSTANCE_INITIALIZER;
 128 #endif
 129
 130 extern int NaClMain(const content::MainFunctionParams&);
 131 extern int ServiceProcessMain(const content::MainFunctionParams&);
 132
 133 namespace {
 134
 135 #if defined(OS_WIN)
 136 const wchar_t kProfilingDll[] = L"memory_watcher.dll";
 137
 138 // Load the memory profiling DLL.  All it needs to be activated
 139 // is to be loaded.  Return true on success, false otherwise.
 140 bool LoadMemoryProfiler() {
 141   HMODULE prof_module = LoadLibrary(kProfilingDll);
 142   return prof_module != NULL;
 143 }
 144
 145 // Early versions of Chrome incorrectly registered a chromehtml: URL handler,
 146 // which gives us nothing but trouble. Avoid launching chrome this way since
 147 // some apps fail to properly escape arguments.
 148 bool HasDeprecatedArguments(const std::wstring& command_line) {
 149   const wchar_t kChromeHtml[] = L"chromehtml:";
 150   std::wstring command_line_lower = command_line;
 151   // We are only searching for ASCII characters so this is OK.
 152   StringToLowerASCII(&command_line_lower);
 153   std::wstring::size_type pos = command_line_lower.find(kChromeHtml);
 154   return (pos != std::wstring::npos);
 155 }
 156
 157 // If we try to access a path that is not currently available, we want the call
 158 // to fail rather than show an error dialog.
 159 void SuppressWindowsErrorDialogs() {
 160   UINT new_flags = SEM_FAILCRITICALERRORS |
 161                    SEM_NOOPENFILEERRORBOX;
 162
 163   // Preserve existing error mode.
 164   UINT existing_flags = SetErrorMode(new_flags);
 165   SetErrorMode(existing_flags | new_flags);
 166 }
 167
 168 #endif  // defined(OS_WIN)
 169
 170 #if defined(OS_LINUX)
 171 static void AdjustLinuxOOMScore(const std::string& process_type) {
 172   // Browsers and zygotes should still be killable, but killed last.
 173   const int kZygoteScore = 0;
 174   // The minimum amount to bump a score by.  This is large enough that
 175   // even if it's translated into the old values, it will still go up
 176   // by at least one.
 177   const int kScoreBump = 100;
 178   // This is the lowest score that renderers and extensions start with
 179   // in the OomPriorityManager.
 180   const int kRendererScore = chrome::kLowestRendererOomScore;
 181   // For "miscellaneous" things, we want them after renderers,
 182   // but before plugins.
 183   const int kMiscScore = kRendererScore - kScoreBump;
 184   // We want plugins to die after the renderers.
 185   const int kPluginScore = kMiscScore - kScoreBump;
 186   int score = -1;
 187
 188   DCHECK(kMiscScore > 0);
 189   DCHECK(kPluginScore > 0);
 190
 191   if (process_type == switches::kPluginProcess ||
 192       process_type == switches::kPpapiPluginProcess) {
 193     score = kPluginScore;
 194   } else if (process_type == switches::kPpapiBrokerProcess) {
 195     // The broker should be killed before the PPAPI plugin.
 196     score = kPluginScore + kScoreBump;
 197   } else if (process_type == switches::kUtilityProcess ||
 198              process_type == switches::kWorkerProcess ||
 199              process_type == switches::kGpuProcess ||
 200              process_type == switches::kServiceProcess) {
 201     score = kMiscScore;
 202 #ifndef DISABLE_NACL
 203   } else if (process_type == switches::kNaClLoaderProcess ||
 204              process_type == switches::kNaClLoaderNonSfiProcess) {
 205     score = kPluginScore;
 206 #endif
 207   } else if (process_type == switches::kZygoteProcess ||
 208              process_type.empty()) {
 209     // For zygotes and unlabeled process types, we want to still make
 210     // them killable by the OOM killer.
 211     score = kZygoteScore;
 212   } else if (process_type == switches::kRendererProcess) {
 213     LOG(WARNING) << "process type 'renderer' "
 214                  << "should be created through the zygote.";
 215     // When debugging, this process type can end up being run directly, but
 216     // this isn't the typical path for assigning the OOM score for it.  Still,
 217     // we want to assign a score that is somewhat representative for debugging.
 218     score = kRendererScore;
 219   } else {
 220     NOTREACHED() << "Unknown process type";
 221   }
 222   if (score > -1)
 223     base::AdjustOOMScore(base::GetCurrentProcId(), score);
 224 }
 225 #endif  // defined(OS_LINUX)
 226
 227 // Enable the heap profiler if the appropriate command-line switch is
 228 // present, bailing out of the app we can't.
 229 void EnableHeapProfiler(const CommandLine& command_line) {
 230 #if defined(OS_WIN)
 231   if (command_line.HasSwitch(switches::kMemoryProfiling))
 232     if (!LoadMemoryProfiler())
 233       exit(-1);
 234 #endif
 235 }
 236
 237 // Returns true if this subprocess type needs the ResourceBundle initialized
 238 // and resources loaded.
 239 bool SubprocessNeedsResourceBundle(const std::string& process_type) {
 240   return
 241 #if defined(OS_WIN) || defined(OS_MACOSX)
 242       // Windows needs resources for the default/null plugin.
 243       // Mac needs them for the plugin process name.
 244       process_type == switches::kPluginProcess ||
 245       // Needed for scrollbar related images.
 246       process_type == switches::kWorkerProcess ||
 247 #endif
 248 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 249       // The zygote process opens the resources for the renderers.
 250       process_type == switches::kZygoteProcess ||
 251 #endif
 252 #if defined(OS_MACOSX)
 253       // Mac needs them too for scrollbar related images and for sandbox
 254       // profiles.
 255       process_type == switches::kNaClLoaderProcess ||
 256       process_type == switches::kPpapiPluginProcess ||
 257       process_type == switches::kPpapiBrokerProcess ||
 258       process_type == switches::kGpuProcess ||
 259 #endif
 260       process_type == switches::kRendererProcess ||
 261       process_type == switches::kUtilityProcess;
 262 }
 263
 264 #if defined(OS_POSIX)
 265 // Check for --version and --product-version; return true if we encountered
 266 // one of these switches and should exit now.
 267 bool HandleVersionSwitches(const CommandLine& command_line) {
 268   const chrome::VersionInfo version_info;
 269
 270 #if !defined(OS_MACOSX)
 271   if (command_line.HasSwitch(switches::kProductVersion)) {
 272     printf("%s\n", version_info.Version().c_str());
 273     return true;
 274   }
 275 #endif
 276
 277   if (command_line.HasSwitch(switches::kVersion)) {
 278     printf("%s %s %s\n",
 279            version_info.Name().c_str(),
 280            version_info.Version().c_str(),
 281            chrome::VersionInfo::GetVersionStringModifier().c_str());
 282     return true;
 283   }
 284
 285   return false;
 286 }
 287
 288 #if !defined(OS_MACOSX) && !defined(OS_CHROMEOS)
 289 // Show the man page if --help or -h is on the command line.
 290 void HandleHelpSwitches(const CommandLine& command_line) {
 291   if (command_line.HasSwitch(switches::kHelp) ||
 292       command_line.HasSwitch(switches::kHelpShort)) {
 293     base::FilePath binary(command_line.argv()[0]);
 294     execlp("man", "man", binary.BaseName().value().c_str(), NULL);
 295     PLOG(FATAL) << "execlp failed";
 296   }
 297 }
 298 #endif
 299
 300 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 301 void SIGTERMProfilingShutdown(int signal) {
 302   Profiling::Stop();
 303   struct sigaction sigact;
 304   memset(&sigact, 0, sizeof(sigact));
 305   sigact.sa_handler = SIG_DFL;
 306   CHECK(sigaction(SIGTERM, &sigact, NULL) == 0);
 307   raise(signal);
 308 }
 309
 310 void SetUpProfilingShutdownHandler() {
 311   struct sigaction sigact;
 312   sigact.sa_handler = SIGTERMProfilingShutdown;
 313   sigact.sa_flags = SA_RESETHAND;
 314   sigemptyset(&sigact.sa_mask);
 315   CHECK(sigaction(SIGTERM, &sigact, NULL) == 0);
 316 }
 317 #endif  // !defined(OS_MACOSX) && !defined(OS_ANDROID)
 318
 319 #endif  // OS_POSIX
 320
 321 struct MainFunction {
 322   const char* name;
 323   int (*function)(const content::MainFunctionParams&);
 324 };
 325
 326 // Initializes the user data dir. Must be called before InitializeLocalState().
 327 void InitializeUserDataDir() {
 328   CommandLine* command_line = CommandLine::ForCurrentProcess();
 329   base::FilePath user_data_dir =
 330       command_line->GetSwitchValuePath(switches::kUserDataDir);
 331   std::string process_type =
 332       command_line->GetSwitchValueASCII(switches::kProcessType);
 333
 334 #if defined(OS_LINUX)
 335   // On Linux, Chrome does not support running multiple copies under different
 336   // DISPLAYs, so the profile directory can be specified in the environment to
 337   // support the virtual desktop use-case.
 338   if (user_data_dir.empty()) {
 339     std::string user_data_dir_string;
 340     scoped_ptr<base::Environment> environment(base::Environment::Create());
 341     if (environment->GetVar("CHROME_USER_DATA_DIR", &user_data_dir_string) &&
 342         IsStringUTF8(user_data_dir_string)) {
 343       user_data_dir = base::FilePath::FromUTF8Unsafe(user_data_dir_string);
 344     }
 345   }
 346 #endif
 347 #if defined(OS_MACOSX) || defined(OS_WIN)
 348   policy::path_parser::CheckUserDataDirPolicy(&user_data_dir);
 349 #endif
 350
 351   const bool specified_directory_was_invalid = !user_data_dir.empty() &&
 352       !PathService::OverrideAndCreateIfNeeded(chrome::DIR_USER_DATA,
 353           user_data_dir, false, true);
 354   // Save inaccessible or invalid paths so the user may be prompted later.
 355   if (specified_directory_was_invalid)
 356     chrome::SetInvalidSpecifiedUserDataDir(user_data_dir);
 357
 358   // Warn and fail early if the process fails to get a user data directory.
 359   if (!PathService::Get(chrome::DIR_USER_DATA, &user_data_dir)) {
 360     // If an invalid command-line or policy override was specified, the user
 361     // will be given an error with that value. Otherwise, use the directory
 362     // returned by PathService (or the fallback default directory) in the error.
 363     if (!specified_directory_was_invalid) {
 364       // PathService::Get() returns false and yields an empty path if it fails
 365       // to create DIR_USER_DATA. Retrieve the default value manually to display
 366       // a more meaningful error to the user in that case.
 367       if (user_data_dir.empty())
 368         chrome::GetDefaultUserDataDirectory(&user_data_dir);
 369       chrome::SetInvalidSpecifiedUserDataDir(user_data_dir);
 370     }
 371
 372     // The browser process (which is identified by an empty |process_type|) will
 373     // handle the error later; other processes that need the dir crash here.
 374     CHECK(process_type.empty()) << "Unable to get the user data directory "
 375                                 << "for process type: " << process_type;
 376   }
 377
 378   // Append the fallback user data directory to the commandline. Otherwise,
 379   // child or service processes will attempt to use the invalid directory.
 380   if (specified_directory_was_invalid)
 381     command_line->AppendSwitchPath(switches::kUserDataDir, user_data_dir);
 382 }
 383
 384 }  // namespace
 385
 386 ChromeMainDelegate::ChromeMainDelegate() {
 387 #if defined(OS_ANDROID)
 388 // On Android the main entry point time is the time when the Java code starts.
 389 // This happens before the shared library containing this code is even loaded.
 390 // The Java startup code has recorded that time, but the C++ code can't fetch it
 391 // from the Java side until it has initialized the JNI. See
 392 // ChromeMainDelegateAndroid.
 393 #else
 394   startup_metric_utils::RecordMainEntryPointTime();
 395 #endif
 396 }
 397
 398 ChromeMainDelegate::~ChromeMainDelegate() {
 399 }
 400
 401 bool ChromeMainDelegate::BasicStartupComplete(int* exit_code) {
 402 #if defined(OS_CHROMEOS)
 403   chromeos::BootTimesLoader::Get()->SaveChromeMainStats();
 404 #endif
 405
 406   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 407
 408 #if defined(OS_MACOSX)
 409   // Give the browser process a longer treadmill, since crashes
 410   // there have more impact.
 411   const bool is_browser = !command_line.HasSwitch(switches::kProcessType);
 412   ObjcEvilDoers::ZombieEnable(true, is_browser ? 10000 : 1000);
 413
 414   SetUpBundleOverrides();
 415   chrome::common::mac::EnableCFBundleBlocker();
 416 #endif
 417
 418   Profiling::ProcessStarted();
 419
 420 #if defined(OS_POSIX)
 421   if (HandleVersionSwitches(command_line)) {
 422     *exit_code = 0;
 423     return true;  // Got a --version switch; exit with a success error code.
 424   }
 425 #if !defined(OS_MACOSX) && !defined(OS_CHROMEOS)
 426   // This will directly exit if the user asked for help.
 427   HandleHelpSwitches(command_line);
 428 #endif
 429 #endif  // OS_POSIX
 430
 431 #if defined(OS_WIN)
 432   // Must do this before any other usage of command line!
 433   if (HasDeprecatedArguments(command_line.GetCommandLineString())) {
 434     *exit_code = 1;
 435     return true;
 436   }
 437 #endif
 438
 439   chrome::RegisterPathProvider();
 440 #if defined(OS_CHROMEOS)
 441   chromeos::RegisterPathProvider();
 442 #endif
 443 #if !defined(DISABLE_NACL) && defined(OS_LINUX)
 444   nacl::RegisterPathProvider();
 445 #endif
 446
 447 // No support for ANDROID yet as DiagnosticsController needs wchar support.
 448 // TODO(gspencer): That's not true anymore, or at least there are no w-string
 449 // references anymore. Not sure if that means this can be enabled on Android or
 450 // not though.  As there is no easily accessible command line on Android, I'm
 451 // not sure this is a big deal.
 452 #if !defined(OS_ANDROID) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 453   // If we are in diagnostics mode this is the end of the line: after the
 454   // diagnostics are run the process will invariably exit.
 455   if (command_line.HasSwitch(switches::kDiagnostics)) {
 456     diagnostics::DiagnosticsWriter::FormatType format =
 457         diagnostics::DiagnosticsWriter::HUMAN;
 458     if (command_line.HasSwitch(switches::kDiagnosticsFormat)) {
 459       std::string format_str =
 460           command_line.GetSwitchValueASCII(switches::kDiagnosticsFormat);
 461       if (format_str == "machine") {
 462         format = diagnostics::DiagnosticsWriter::MACHINE;
 463       } else if (format_str == "log") {
 464         format = diagnostics::DiagnosticsWriter::LOG;
 465       } else {
 466         DCHECK_EQ("human", format_str);
 467       }
 468     }
 469
 470     diagnostics::DiagnosticsWriter writer(format);
 471     *exit_code = diagnostics::DiagnosticsController::GetInstance()->Run(
 472         command_line, &writer);
 473     diagnostics::DiagnosticsController::GetInstance()->ClearResults();
 474     return true;
 475   }
 476 #endif
 477
 478 #if defined(OS_CHROMEOS)
 479   // If we are recovering from a crash on ChromeOS, then we will do some
 480   // recovery using the diagnostics module, and then continue on. We fake up a
 481   // command line to tell it that we want it to recover, and to preserve the
 482   // original command line.
 483   if (command_line.HasSwitch(chromeos::switches::kLoginUser) ||
 484       command_line.HasSwitch(switches::kDiagnosticsRecovery)) {
 485
 486     // The statistics subsystem needs get initialized soon enough for the
 487     // statistics to be collected.  It's safe to call this more than once.
 488     base::StatisticsRecorder::Initialize();
 489
 490     CommandLine interim_command_line(command_line.GetProgram());
 491     const char* kSwitchNames[] = {switches::kUserDataDir, };
 492     interim_command_line.CopySwitchesFrom(
 493         command_line, kSwitchNames, arraysize(kSwitchNames));
 494     interim_command_line.AppendSwitch(switches::kDiagnostics);
 495     interim_command_line.AppendSwitch(switches::kDiagnosticsRecovery);
 496
 497     diagnostics::DiagnosticsWriter::FormatType format =
 498         diagnostics::DiagnosticsWriter::LOG;
 499     if (command_line.HasSwitch(switches::kDiagnosticsFormat)) {
 500       std::string format_str =
 501           command_line.GetSwitchValueASCII(switches::kDiagnosticsFormat);
 502       if (format_str == "machine") {
 503         format = diagnostics::DiagnosticsWriter::MACHINE;
 504       } else if (format_str == "human") {
 505         format = diagnostics::DiagnosticsWriter::HUMAN;
 506       } else {
 507         DCHECK_EQ("log", format_str);
 508       }
 509     }
 510
 511     diagnostics::DiagnosticsWriter writer(format);
 512     int diagnostics_exit_code =
 513         diagnostics::DiagnosticsController::GetInstance()->Run(command_line,
 514                                                                &writer);
 515     if (diagnostics_exit_code) {
 516       // Diagnostics has failed somehow, so we exit.
 517       *exit_code = diagnostics_exit_code;
 518       return true;
 519     }
 520
 521     // Now we run the actual recovery tasks.
 522     int recovery_exit_code =
 523         diagnostics::DiagnosticsController::GetInstance()->RunRecovery(
 524             command_line, &writer);
 525
 526     if (recovery_exit_code) {
 527       // Recovery has failed somehow, so we exit.
 528       *exit_code = recovery_exit_code;
 529       return true;
 530     }
 531   } else {  // Not running diagnostics or recovery.
 532     diagnostics::DiagnosticsController::GetInstance()->RecordRegularStartup();
 533   }
 534 #endif
 535
 536   content::SetContentClient(&chrome_content_client_);
 537
 538   return false;
 539 }
 540
 541 #if defined(OS_MACOSX)
 542 void ChromeMainDelegate::InitMacCrashReporter(
 543     const base::CommandLine& command_line,
 544     const std::string& process_type) {
 545   // TODO(mark): Right now, InitCrashReporter() needs to be called after
 546   // CommandLine::Init() and chrome::RegisterPathProvider().  Ideally,
 547   // Breakpad initialization could occur sooner, preferably even before the
 548   // framework dylib is even loaded, to catch potential early crashes.
 549   breakpad::InitCrashReporter(process_type);
 550
 551 #if defined(NDEBUG)
 552   bool is_debug_build = false;
 553 #else
 554   bool is_debug_build = true;
 555 #endif
 556
 557   // Details on when we enable Apple's Crash reporter.
 558   //
 559   // Motivation:
 560   //    In debug mode it takes Apple's crash reporter eons to generate a crash
 561   // dump.
 562   //
 563   // What we do:
 564   // * We only pass crashes for foreground processes to Apple's Crash
 565   //    reporter. At the time of this writing, that means just the Browser
 566   //    process.
 567   // * If Breakpad is enabled, it will pass browser crashes to Crash Reporter
 568   //    itself.
 569   // * If Breakpad is disabled, we only turn on Crash Reporter for the
 570   //    Browser process in release mode.
 571   if (!command_line.HasSwitch(switches::kDisableBreakpad)) {
 572     bool disable_apple_crash_reporter = is_debug_build ||
 573         base::mac::IsBackgroundOnlyProcess();
 574     if (!breakpad::IsCrashReporterEnabled() && disable_apple_crash_reporter) {
 575       base::mac::DisableOSCrashDumps();
 576     }
 577   }
 578
 579   // Mac Chrome is packaged with a main app bundle and a helper app bundle.
 580   // The main app bundle should only be used for the browser process, so it
 581   // should never see a --type switch (switches::kProcessType).  Likewise,
 582   // the helper should always have a --type switch.
 583   //
 584   // This check is done this late so there is already a call to
 585   // base::mac::IsBackgroundOnlyProcess(), so there is no change in
 586   // startup/initialization order.
 587
 588   // The helper's Info.plist marks it as a background only app.
 589   if (base::mac::IsBackgroundOnlyProcess()) {
 590     CHECK(command_line.HasSwitch(switches::kProcessType) &&
 591           !process_type.empty())
 592         << "Helper application requires --type.";
 593
 594     // In addition, some helper flavors only work with certain process types.
 595     base::FilePath executable;
 596     if (PathService::Get(base::FILE_EXE, &executable) &&
 597         executable.value().size() >= 3) {
 598       std::string last_three =
 599           executable.value().substr(executable.value().size() - 3);
 600
 601       if (last_three == " EH") {
 602         CHECK(process_type == switches::kPluginProcess ||
 603               process_type == switches::kUtilityProcess)
 604             << "Executable-heap process requires --type="
 605             << switches::kPluginProcess << " or "
 606             << switches::kUtilityProcess << ", saw " << process_type;
 607       } else if (last_three == " NP") {
 608         CHECK_EQ(switches::kNaClLoaderProcess, process_type)
 609             << "Non-PIE process requires --type="
 610             << switches::kNaClLoaderProcess << ", saw " << process_type;
 611       } else {
 612         CHECK(process_type != switches::kPluginProcess &&
 613               process_type != switches::kNaClLoaderProcess)
 614             << "Non-executable-heap PIE process is intolerant of --type="
 615             << switches::kPluginProcess << " and "
 616             << switches::kNaClLoaderProcess << ", saw " << process_type;
 617       }
 618     }
 619   } else {
 620     CHECK(!command_line.HasSwitch(switches::kProcessType) &&
 621           process_type.empty())
 622         << "Main application forbids --type, saw " << process_type;
 623   }
 624
 625   if (breakpad::IsCrashReporterEnabled())
 626     breakpad::InitCrashProcessInfo(process_type);
 627 }
 628 #endif  // defined(OS_MACOSX)
 629
 630 void ChromeMainDelegate::PreSandboxStartup() {
 631   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 632   std::string process_type =
 633       command_line.GetSwitchValueASCII(switches::kProcessType);
 634
 635 #if defined(OS_POSIX)
 636   breakpad::SetBreakpadClient(g_chrome_breakpad_client.Pointer());
 637 #endif
 638
 639 #if defined(OS_MACOSX)
 640   // On the Mac, the child executable lives at a predefined location within
 641   // the app bundle's versioned directory.
 642   PathService::Override(content::CHILD_PROCESS_EXE,
 643                         chrome::GetVersionedDirectory().
 644                         Append(chrome::kHelperProcessExecutablePath));
 645
 646   InitMacCrashReporter(command_line, process_type);
 647 #endif
 648
 649 #if defined(OS_WIN)
 650   child_process_logging::Init();
 651 #endif
 652 #if defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX))
 653   // Create an instance of the CPU class to parse /proc/cpuinfo and cache
 654   // cpu_brand info.
 655   base::CPU cpu_info;
 656 #endif
 657
 658   // Initialize the user data dir for any process type that needs it.
 659   if (chrome::ProcessNeedsProfileDir(process_type))
 660     InitializeUserDataDir();
 661
 662   stats_counter_timer_.reset(new base::StatsCounterTimer("Chrome.Init"));
 663   startup_timer_.reset(new base::StatsScope<base::StatsCounterTimer>
 664                        (*stats_counter_timer_));
 665
 666   // Enable the heap profiler as early as possible!
 667   EnableHeapProfiler(command_line);
 668
 669   // Enable Message Loop related state asap.
 670   if (command_line.HasSwitch(switches::kMessageLoopHistogrammer))
 671     base::MessageLoop::EnableHistogrammer(true);
 672
 673 #if !defined(OS_ANDROID)
 674   // Android does InitLogging when library is loaded. Skip here.
 675   logging::OldFileDeletionState file_state =
 676       logging::APPEND_TO_OLD_LOG_FILE;
 677   if (process_type.empty()) {
 678     file_state = logging::DELETE_OLD_LOG_FILE;
 679   }
 680   logging::InitChromeLogging(command_line, file_state);
 681 #endif
 682
 683 #if defined(OS_WIN)
 684   // TODO(zturner): Throbber icons are still stored in chrome.dll, this can be
 685   // killed once those are merged into resources.pak.  See
 686   // GlassBrowserFrameView::InitThrobberIcons() and http://crbug.com/368327.
 687   ui::SetResourcesDataDLL(_AtlBaseModule.GetResourceInstance());
 688 #endif
 689
 690   if (SubprocessNeedsResourceBundle(process_type)) {
 691     // Initialize ResourceBundle which handles files loaded from external
 692     // sources.  The language should have been passed in to us from the
 693     // browser process as a command line flag.
 694 #if defined(DISABLE_NACL)
 695     DCHECK(command_line.HasSwitch(switches::kLang) ||
 696            process_type == switches::kZygoteProcess ||
 697            process_type == switches::kGpuProcess ||
 698            process_type == switches::kPpapiBrokerProcess ||
 699            process_type == switches::kPpapiPluginProcess);
 700 #else
 701     DCHECK(command_line.HasSwitch(switches::kLang) ||
 702            process_type == switches::kZygoteProcess ||
 703            process_type == switches::kGpuProcess ||
 704            process_type == switches::kNaClLoaderProcess ||
 705            process_type == switches::kPpapiBrokerProcess ||
 706            process_type == switches::kPpapiPluginProcess);
 707 #endif
 708
 709     // TODO(markusheintz): The command line flag --lang is actually processed
 710     // by the CommandLinePrefStore, and made available through the PrefService
 711     // via the preference prefs::kApplicationLocale. The browser process uses
 712     // the --lang flag to pass the value of the PrefService in here. Maybe
 713     // this value could be passed in a different way.
 714     const std::string locale =
 715         command_line.GetSwitchValueASCII(switches::kLang);
 716 #if defined(OS_ANDROID)
 717     // The renderer sandbox prevents us from accessing our .pak files directly.
 718     // Therefore file descriptors to the .pak files that we need are passed in
 719     // at process creation time.
 720     int locale_pak_fd = base::GlobalDescriptors::GetInstance()->MaybeGet(
 721         kAndroidLocalePakDescriptor);
 722     CHECK(locale_pak_fd != -1);
 723     ResourceBundle::InitSharedInstanceWithPakFile(base::File(locale_pak_fd),
 724                                                   false);
 725
 726     int extra_pak_keys[] = {
 727       kAndroidChrome100PercentPakDescriptor,
 728       kAndroidUIResourcesPakDescriptor,
 729     };
 730     for (size_t i = 0; i < arraysize(extra_pak_keys); ++i) {
 731       int pak_fd =
 732           base::GlobalDescriptors::GetInstance()->MaybeGet(extra_pak_keys[i]);
 733       CHECK(pak_fd != -1);
 734       ResourceBundle::GetSharedInstance().AddDataPackFromFile(
 735           base::File(pak_fd), ui::SCALE_FACTOR_100P);
 736     }
 737
 738     base::i18n::SetICUDefaultLocale(locale);
 739     const std::string loaded_locale = locale;
 740 #else
 741     const std::string loaded_locale =
 742         ResourceBundle::InitSharedInstanceWithLocale(locale, NULL);
 743
 744     base::FilePath resources_pack_path;
 745     PathService::Get(chrome::FILE_RESOURCES_PACK, &resources_pack_path);
 746     ResourceBundle::GetSharedInstance().AddDataPackFromPath(
 747         resources_pack_path, ui::SCALE_FACTOR_NONE);
 748 #endif
 749     CHECK(!loaded_locale.empty()) << "Locale could not be found for " <<
 750         locale;
 751
 752 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 753     if (process_type == switches::kUtilityProcess ||
 754         process_type == switches::kZygoteProcess) {
 755       chrome::ChromeContentUtilityClient::PreSandboxStartup();
 756     }
 757 #endif
 758   }
 759
 760 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 761   // Zygote needs to call InitCrashReporter() in RunZygote().
 762   if (process_type != switches::kZygoteProcess) {
 763 #if defined(OS_ANDROID)
 764     if (process_type.empty())
 765       breakpad::InitCrashReporter(process_type);
 766     else
 767       breakpad::InitNonBrowserCrashReporterForAndroid(process_type);
 768 #else  // !defined(OS_ANDROID)
 769     breakpad::InitCrashReporter(process_type);
 770 #endif  // defined(OS_ANDROID)
 771   }
 772 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
 773
 774   // After all the platform Breakpads have been initialized, store the command
 775   // line for crash reporting.
 776   crash_keys::SetSwitchesFromCommandLine(&command_line);
 777 }
 778
 779 void ChromeMainDelegate::SandboxInitialized(const std::string& process_type) {
 780   startup_timer_->Stop();  // End of Startup Time Measurement.
 781
 782   // Note: If you are adding a new process type below, be sure to adjust the
 783   // AdjustLinuxOOMScore function too.
 784 #if defined(OS_LINUX)
 785   AdjustLinuxOOMScore(process_type);
 786 #endif
 787 #if defined(OS_WIN)
 788   SuppressWindowsErrorDialogs();
 789 #endif
 790 }
 791
 792 int ChromeMainDelegate::RunProcess(
 793     const std::string& process_type,
 794     const content::MainFunctionParams& main_function_params) {
 795   // ANDROID doesn't support "service", so no ServiceProcessMain, and arraysize
 796   // doesn't support empty array. So we comment out the block for Android.
 797 #if !defined(OS_ANDROID)
 798   static const MainFunction kMainFunctions[] = {
 799 #if defined(ENABLE_FULL_PRINTING) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 800     { switches::kServiceProcess,     ServiceProcessMain },
 801 #endif
 802
 803 #if defined(OS_MACOSX)
 804     { switches::kRelauncherProcess,
 805       mac_relauncher::internal::RelauncherMain },
 806 #endif
 807
 808     // This entry is not needed on Linux, where the NaCl loader
 809     // process is launched via nacl_helper instead.
 810 #if !defined(DISABLE_NACL) && !defined(CHROME_MULTIPLE_DLL_BROWSER) && \
 811     !defined(OS_LINUX)
 812     { switches::kNaClLoaderProcess,  NaClMain },
 813 #else
 814     { "<invalid>", NULL },  // To avoid constant array of size 0
 815                             // when DISABLE_NACL and CHROME_MULTIPLE_DLL_CHILD
 816 #endif  // DISABLE_NACL
 817   };
 818
 819   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 820     if (process_type == kMainFunctions[i].name)
 821       return kMainFunctions[i].function(main_function_params);
 822   }
 823 #endif
 824
 825   return -1;
 826 }
 827
 828 void ChromeMainDelegate::ProcessExiting(const std::string& process_type) {
 829   if (SubprocessNeedsResourceBundle(process_type))
 830     ResourceBundle::CleanupSharedInstance();
 831 #if !defined(OS_ANDROID)
 832   logging::CleanupChromeLogging();
 833 #else
 834   // Android doesn't use InitChromeLogging, so we close the log file manually.
 835   logging::CloseLogFile();
 836 #endif  // !defined(OS_ANDROID)
 837 }
 838
 839 #if defined(OS_MACOSX)
 840 bool ChromeMainDelegate::ProcessRegistersWithSystemProcess(
 841     const std::string& process_type) {
 842   return process_type == switches::kNaClLoaderProcess;
 843 }
 844
 845 bool ChromeMainDelegate::ShouldSendMachPort(const std::string& process_type) {
 846   return process_type != switches::kRelauncherProcess &&
 847       process_type != switches::kServiceProcess;
 848 }
 849
 850 bool ChromeMainDelegate::DelaySandboxInitialization(
 851     const std::string& process_type) {
 852   // NaClLoader does this in NaClMainPlatformDelegate::EnableSandbox().
 853   // No sandbox needed for relauncher.
 854   return process_type == switches::kNaClLoaderProcess ||
 855       process_type == switches::kRelauncherProcess;
 856 }
 857 #elif defined(OS_POSIX) && !defined(OS_ANDROID)
 858 content::ZygoteForkDelegate* ChromeMainDelegate::ZygoteStarting() {
 859 #if defined(DISABLE_NACL)
 860   return NULL;
 861 #else
 862   return new NaClForkDelegate();
 863 #endif
 864 }
 865
 866 void ChromeMainDelegate::ZygoteForked() {
 867   Profiling::ProcessStarted();
 868   if (Profiling::BeingProfiled()) {
 869     base::debug::RestartProfilingAfterFork();
 870     SetUpProfilingShutdownHandler();
 871   }
 872
 873   // Needs to be called after we have chrome::DIR_USER_DATA.  BrowserMain sets
 874   // this up for the browser process in a different manner.
 875   const CommandLine* command_line = CommandLine::ForCurrentProcess();
 876   std::string process_type =
 877       command_line->GetSwitchValueASCII(switches::kProcessType);
 878   breakpad::InitCrashReporter(process_type);
 879
 880   // Reset the command line for the newly spawned process.
 881   crash_keys::SetSwitchesFromCommandLine(command_line);
 882 }
 883
 884 #endif  // OS_MACOSX
 885
 886 content::ContentBrowserClient*
 887 ChromeMainDelegate::CreateContentBrowserClient() {
 888 #if defined(CHROME_MULTIPLE_DLL_CHILD)
 889   return NULL;
 890 #else
 891   return g_chrome_content_browser_client.Pointer();
 892 #endif
 893 }
 894
 895 content::ContentPluginClient* ChromeMainDelegate::CreateContentPluginClient() {
 896 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 897   return NULL;
 898 #else
 899   return g_chrome_content_plugin_client.Pointer();
 900 #endif
 901 }
 902
 903 content::ContentRendererClient*
 904 ChromeMainDelegate::CreateContentRendererClient() {
 905 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 906   return NULL;
 907 #else
 908   return g_chrome_content_renderer_client.Pointer();
 909 #endif
 910 }
 911
 912 content::ContentUtilityClient*
 913 ChromeMainDelegate::CreateContentUtilityClient() {
 914 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 915   return NULL;
 916 #else
 917   return g_chrome_content_utility_client.Pointer();
 918 #endif
 919 }