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/base_paths.h"
   8 #include "base/command_line.h"
   9 #include "base/cpu.h"
  10 #include "base/files/file_path.h"
  11 #include "base/i18n/rtl.h"
  12 #include "base/lazy_instance.h"
  13 #include "base/message_loop/message_loop.h"
  14 #include "base/metrics/statistics_recorder.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 "base/trace_event/trace_event_impl.h"
  20 #include "build/build_config.h"
  21 #include "chrome/browser/chrome_content_browser_client.h"
  22 #include "chrome/browser/defaults.h"
  23 #include "chrome/common/channel_info.h"
  24 #include "chrome/common/chrome_constants.h"
  25 #include "chrome/common/chrome_content_client.h"
  26 #include "chrome/common/chrome_paths.h"
  27 #include "chrome/common/chrome_paths_internal.h"
  28 #include "chrome/common/chrome_result_codes.h"
  29 #include "chrome/common/chrome_switches.h"
  30 #include "chrome/common/crash_keys.h"
  31 #include "chrome/common/logging_chrome.h"
  32 #include "chrome/common/profiling.h"
  33 #include "chrome/common/switch_utils.h"
  34 #include "chrome/common/trace_event_args_whitelist.h"
  35 #include "chrome/common/url_constants.h"
  36 #include "chrome/plugin/chrome_content_plugin_client.h"
  37 #include "chrome/renderer/chrome_content_renderer_client.h"
  38 #include "chrome/utility/chrome_content_utility_client.h"
  39 #include "components/component_updater/component_updater_paths.h"
  40 #include "components/content_settings/core/common/content_settings_pattern.h"
  41 #include "components/startup_metric_utils/startup_metric_utils.h"
  42 #include "components/version_info/version_info.h"
  43 #include "content/public/common/content_client.h"
  44 #include "content/public/common/content_paths.h"
  45 #include "extensions/common/constants.h"
  46 #include "ui/base/ui_base_switches.h"
  47
  48 #if defined(OS_WIN)
  49 #include <atlbase.h>
  50 #include <malloc.h>
  51 #include <algorithm>
  52 #include "chrome/app/close_handle_hook_win.h"
  53 #include "chrome/common/child_process_logging.h"
  54 #include "chrome/common/v8_breakpad_support_win.h"
  55 #include "sandbox/win/src/sandbox.h"
  56 #include "ui/base/resource/resource_bundle_win.h"
  57 #endif
  58
  59 #if defined(OS_MACOSX)
  60 #include "base/mac/foundation_util.h"
  61 #include "chrome/app/chrome_main_mac.h"
  62 #include "chrome/browser/mac/relauncher.h"
  63 #include "chrome/common/mac/cfbundle_blocker.h"
  64 #include "chrome/common/mac/objc_zombie.h"
  65 #include "components/crash/app/crashpad_mac.h"
  66 #include "ui/base/l10n/l10n_util_mac.h"
  67 #endif
  68
  69 #if defined(OS_POSIX)
  70 #include <locale.h>
  71 #include <signal.h>
  72 #include "chrome/app/chrome_crash_reporter_client.h"
  73 #include "components/crash/app/crash_reporter_client.h"
  74 #endif
  75
  76 #if !defined(DISABLE_NACL) && defined(OS_LINUX)
  77 #include "components/nacl/common/nacl_paths.h"
  78 #include "components/nacl/zygote/nacl_fork_delegate_linux.h"
  79 #endif
  80
  81 #if defined(OS_CHROMEOS)
  82 #include "base/sys_info.h"
  83 #include "chrome/browser/chromeos/boot_times_recorder.h"
  84 #include "chromeos/chromeos_paths.h"
  85 #include "chromeos/chromeos_switches.h"
  86 #endif
  87
  88 #if defined(OS_ANDROID)
  89 #include "chrome/browser/android/java_exception_reporter.h"
  90 #include "chrome/common/descriptors_android.h"
  91 #else
  92 // Diagnostics is only available on non-android platforms.
  93 #include "chrome/browser/diagnostics/diagnostics_controller.h"
  94 #include "chrome/browser/diagnostics/diagnostics_writer.h"
  95 #endif
  96
  97 #if defined(USE_X11)
  98 #include <stdlib.h>
  99 #include <string.h>
 100 #include "ui/base/x/x11_util.h"
 101 #endif
 102
 103 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 104 #include "components/crash/app/breakpad_linux.h"
 105 #endif
 106
 107 #if defined(OS_LINUX)
 108 #include "base/environment.h"
 109 #endif
 110
 111 #if defined(OS_MACOSX) || defined(OS_WIN)
 112 #include "chrome/browser/policy/policy_path_parser.h"
 113 #endif
 114
 115 #if !defined(DISABLE_NACL)
 116 #include "components/nacl/common/nacl_switches.h"
 117 #include "components/nacl/renderer/plugin/ppapi_entrypoints.h"
 118 #endif
 119
 120 #if defined(ENABLE_PLUGINS) && (defined(CHROME_MULTIPLE_DLL_CHILD) || \
 121     !defined(CHROME_MULTIPLE_DLL_BROWSER))
 122 #include "pdf/pdf.h"
 123 #endif
 124
 125 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 126 #include "chrome/child/pdf_child_init.h"
 127
 128 base::LazyInstance<ChromeContentRendererClient>
 129     g_chrome_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 130 base::LazyInstance<ChromeContentUtilityClient>
 131     g_chrome_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 132 base::LazyInstance<chrome::ChromeContentPluginClient>
 133     g_chrome_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 134 #endif
 135
 136 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 137 base::LazyInstance<chrome::ChromeContentBrowserClient>
 138     g_chrome_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 139 #endif
 140
 141 #if defined(OS_POSIX)
 142 base::LazyInstance<chrome::ChromeCrashReporterClient>::Leaky
 143     g_chrome_crash_client = LAZY_INSTANCE_INITIALIZER;
 144 #endif
 145
 146 extern int NaClMain(const content::MainFunctionParams&);
 147 extern int ServiceProcessMain(const content::MainFunctionParams&);
 148
 149 namespace {
 150
 151 #if defined(OS_WIN)
 152 // Early versions of Chrome incorrectly registered a chromehtml: URL handler,
 153 // which gives us nothing but trouble. Avoid launching chrome this way since
 154 // some apps fail to properly escape arguments.
 155 bool HasDeprecatedArguments(const std::wstring& command_line) {
 156   const wchar_t kChromeHtml[] = L"chromehtml:";
 157   std::wstring command_line_lower = command_line;
 158   // We are only searching for ASCII characters so this is OK.
 159   base::StringToLowerASCII(&command_line_lower);
 160   std::wstring::size_type pos = command_line_lower.find(kChromeHtml);
 161   return (pos != std::wstring::npos);
 162 }
 163
 164 // If we try to access a path that is not currently available, we want the call
 165 // to fail rather than show an error dialog.
 166 void SuppressWindowsErrorDialogs() {
 167   UINT new_flags = SEM_FAILCRITICALERRORS |
 168                    SEM_NOOPENFILEERRORBOX;
 169
 170   // Preserve existing error mode.
 171   UINT existing_flags = SetErrorMode(new_flags);
 172   SetErrorMode(existing_flags | new_flags);
 173 }
 174
 175 bool IsSandboxedProcess() {
 176   typedef bool (*IsSandboxedProcessFunc)();
 177   IsSandboxedProcessFunc is_sandboxed_process_func =
 178       reinterpret_cast<IsSandboxedProcessFunc>(
 179           GetProcAddress(GetModuleHandle(NULL), "IsSandboxedProcess"));
 180   return is_sandboxed_process_func && is_sandboxed_process_func();
 181 }
 182
 183 #endif  // defined(OS_WIN)
 184
 185 #if defined(OS_LINUX)
 186 static void AdjustLinuxOOMScore(const std::string& process_type) {
 187   // Browsers and zygotes should still be killable, but killed last.
 188   const int kZygoteScore = 0;
 189   // The minimum amount to bump a score by.  This is large enough that
 190   // even if it's translated into the old values, it will still go up
 191   // by at least one.
 192   const int kScoreBump = 100;
 193   // This is the lowest score that renderers and extensions start with
 194   // in the OomPriorityManager.
 195   const int kRendererScore = chrome::kLowestRendererOomScore;
 196   // For "miscellaneous" things, we want them after renderers,
 197   // but before plugins.
 198   const int kMiscScore = kRendererScore - kScoreBump;
 199   // We want plugins to die after the renderers.
 200   const int kPluginScore = kMiscScore - kScoreBump;
 201   int score = -1;
 202
 203   DCHECK(kMiscScore > 0);
 204   DCHECK(kPluginScore > 0);
 205
 206   if (process_type == switches::kPluginProcess ||
 207       process_type == switches::kPpapiPluginProcess) {
 208     score = kPluginScore;
 209   } else if (process_type == switches::kPpapiBrokerProcess) {
 210     // The broker should be killed before the PPAPI plugin.
 211     score = kPluginScore + kScoreBump;
 212   } else if (process_type == switches::kUtilityProcess ||
 213              process_type == switches::kGpuProcess ||
 214              process_type == switches::kServiceProcess) {
 215     score = kMiscScore;
 216 #ifndef DISABLE_NACL
 217   } else if (process_type == switches::kNaClLoaderProcess ||
 218              process_type == switches::kNaClLoaderNonSfiProcess) {
 219     score = kPluginScore;
 220 #endif
 221   } else if (process_type == switches::kZygoteProcess ||
 222              process_type.empty()) {
 223     // For zygotes and unlabeled process types, we want to still make
 224     // them killable by the OOM killer.
 225     score = kZygoteScore;
 226   } else if (process_type == switches::kRendererProcess) {
 227     LOG(WARNING) << "process type 'renderer' "
 228                  << "should be created through the zygote.";
 229     // When debugging, this process type can end up being run directly, but
 230     // this isn't the typical path for assigning the OOM score for it.  Still,
 231     // we want to assign a score that is somewhat representative for debugging.
 232     score = kRendererScore;
 233   } else {
 234     NOTREACHED() << "Unknown process type";
 235   }
 236   if (score > -1)
 237     base::AdjustOOMScore(base::GetCurrentProcId(), score);
 238 }
 239 #endif  // defined(OS_LINUX)
 240
 241 // Returns true if this subprocess type needs the ResourceBundle initialized
 242 // and resources loaded.
 243 bool SubprocessNeedsResourceBundle(const std::string& process_type) {
 244   return
 245 #if defined(OS_WIN) || defined(OS_MACOSX)
 246       // Windows needs resources for the default/null plugin.
 247       // Mac needs them for the plugin process name.
 248       process_type == switches::kPluginProcess ||
 249 #endif
 250 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 251       // The zygote process opens the resources for the renderers.
 252       process_type == switches::kZygoteProcess ||
 253 #endif
 254 #if defined(OS_MACOSX)
 255       // Mac needs them too for scrollbar related images and for sandbox
 256       // profiles.
 257 #if !defined(DISABLE_NACL)
 258       process_type == switches::kNaClLoaderProcess ||
 259 #endif
 260       process_type == switches::kPpapiPluginProcess ||
 261       process_type == switches::kPpapiBrokerProcess ||
 262       process_type == switches::kGpuProcess ||
 263 #endif
 264       process_type == switches::kRendererProcess ||
 265       process_type == switches::kUtilityProcess;
 266 }
 267
 268 #if defined(OS_POSIX)
 269 // Check for --version and --product-version; return true if we encountered
 270 // one of these switches and should exit now.
 271 bool HandleVersionSwitches(const base::CommandLine& command_line) {
 272 #if !defined(OS_MACOSX)
 273   if (command_line.HasSwitch(switches::kProductVersion)) {
 274     printf("%s\n", version_info::GetVersionNumber().c_str());
 275     return true;
 276   }
 277 #endif
 278
 279   if (command_line.HasSwitch(switches::kVersion)) {
 280     printf("%s %s %s\n",
 281            version_info::GetProductName().c_str(),
 282            version_info::GetVersionNumber().c_str(),
 283            chrome::GetChannelString().c_str());
 284     return true;
 285   }
 286
 287   return false;
 288 }
 289
 290 #if !defined(OS_MACOSX) && !defined(OS_CHROMEOS)
 291 // Show the man page if --help or -h is on the command line.
 292 void HandleHelpSwitches(const base::CommandLine& command_line) {
 293   if (command_line.HasSwitch(switches::kHelp) ||
 294       command_line.HasSwitch(switches::kHelpShort)) {
 295     base::FilePath binary(command_line.argv()[0]);
 296     execlp("man", "man", binary.BaseName().value().c_str(), NULL);
 297     PLOG(FATAL) << "execlp failed";
 298   }
 299 }
 300 #endif
 301
 302 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 303 void SIGTERMProfilingShutdown(int signal) {
 304   Profiling::Stop();
 305   struct sigaction sigact;
 306   memset(&sigact, 0, sizeof(sigact));
 307   sigact.sa_handler = SIG_DFL;
 308   CHECK(sigaction(SIGTERM, &sigact, NULL) == 0);
 309   raise(signal);
 310 }
 311
 312 void SetUpProfilingShutdownHandler() {
 313   struct sigaction sigact;
 314   sigact.sa_handler = SIGTERMProfilingShutdown;
 315   sigact.sa_flags = SA_RESETHAND;
 316   sigemptyset(&sigact.sa_mask);
 317   CHECK(sigaction(SIGTERM, &sigact, NULL) == 0);
 318 }
 319 #endif  // !defined(OS_MACOSX) && !defined(OS_ANDROID)
 320
 321 #endif  // OS_POSIX
 322
 323 struct MainFunction {
 324   const char* name;
 325   int (*function)(const content::MainFunctionParams&);
 326 };
 327
 328 // Initializes the user data dir. Must be called before InitializeLocalState().
 329 void InitializeUserDataDir() {
 330   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 331   base::FilePath user_data_dir =
 332       command_line->GetSwitchValuePath(switches::kUserDataDir);
 333   std::string process_type =
 334       command_line->GetSwitchValueASCII(switches::kProcessType);
 335
 336 #if defined(OS_LINUX)
 337   // On Linux, Chrome does not support running multiple copies under different
 338   // DISPLAYs, so the profile directory can be specified in the environment to
 339   // support the virtual desktop use-case.
 340   if (user_data_dir.empty()) {
 341     std::string user_data_dir_string;
 342     scoped_ptr<base::Environment> environment(base::Environment::Create());
 343     if (environment->GetVar("CHROME_USER_DATA_DIR", &user_data_dir_string) &&
 344         base::IsStringUTF8(user_data_dir_string)) {
 345       user_data_dir = base::FilePath::FromUTF8Unsafe(user_data_dir_string);
 346     }
 347   }
 348 #endif
 349 #if defined(OS_MACOSX) || defined(OS_WIN)
 350   policy::path_parser::CheckUserDataDirPolicy(&user_data_dir);
 351 #endif
 352
 353   // On Windows, trailing separators leave Chrome in a bad state.
 354   // See crbug.com/464616.
 355   if (user_data_dir.EndsWithSeparator())
 356     user_data_dir = user_data_dir.StripTrailingSeparators();
 357
 358   const bool specified_directory_was_invalid = !user_data_dir.empty() &&
 359       !PathService::OverrideAndCreateIfNeeded(chrome::DIR_USER_DATA,
 360           user_data_dir, false, true);
 361   // Save inaccessible or invalid paths so the user may be prompted later.
 362   if (specified_directory_was_invalid)
 363     chrome::SetInvalidSpecifiedUserDataDir(user_data_dir);
 364
 365   // Warn and fail early if the process fails to get a user data directory.
 366   if (!PathService::Get(chrome::DIR_USER_DATA, &user_data_dir)) {
 367     // If an invalid command-line or policy override was specified, the user
 368     // will be given an error with that value. Otherwise, use the directory
 369     // returned by PathService (or the fallback default directory) in the error.
 370     if (!specified_directory_was_invalid) {
 371       // PathService::Get() returns false and yields an empty path if it fails
 372       // to create DIR_USER_DATA. Retrieve the default value manually to display
 373       // a more meaningful error to the user in that case.
 374       if (user_data_dir.empty())
 375         chrome::GetDefaultUserDataDirectory(&user_data_dir);
 376       chrome::SetInvalidSpecifiedUserDataDir(user_data_dir);
 377     }
 378
 379     // The browser process (which is identified by an empty |process_type|) will
 380     // handle the error later; other processes that need the dir crash here.
 381     CHECK(process_type.empty()) << "Unable to get the user data directory "
 382                                 << "for process type: " << process_type;
 383   }
 384
 385   // Append the fallback user data directory to the commandline. Otherwise,
 386   // child or service processes will attempt to use the invalid directory.
 387   if (specified_directory_was_invalid)
 388     command_line->AppendSwitchPath(switches::kUserDataDir, user_data_dir);
 389 }
 390
 391 }  // namespace
 392
 393 ChromeMainDelegate::ChromeMainDelegate() {
 394 #if defined(OS_ANDROID)
 395 // On Android the main entry point time is the time when the Java code starts.
 396 // This happens before the shared library containing this code is even loaded.
 397 // The Java startup code has recorded that time, but the C++ code can't fetch it
 398 // from the Java side until it has initialized the JNI. See
 399 // ChromeMainDelegateAndroid.
 400 #else
 401   startup_metric_utils::RecordMainEntryPointTime();
 402 #endif
 403 }
 404
 405 ChromeMainDelegate::~ChromeMainDelegate() {
 406 }
 407
 408 bool ChromeMainDelegate::BasicStartupComplete(int* exit_code) {
 409 #if defined(OS_CHROMEOS)
 410   chromeos::BootTimesRecorder::Get()->SaveChromeMainStats();
 411 #endif
 412
 413   const base::CommandLine& command_line =
 414       *base::CommandLine::ForCurrentProcess();
 415
 416
 417 #if defined(OS_WIN)
 418   // Browser should not be sandboxed.
 419   const bool is_browser = !command_line.HasSwitch(switches::kProcessType);
 420   if (is_browser && IsSandboxedProcess()) {
 421     *exit_code = chrome::RESULT_CODE_INVALID_SANDBOX_STATE;
 422     return true;
 423   }
 424 #endif
 425
 426 #if defined(OS_MACOSX)
 427   // Give the browser process a longer treadmill, since crashes
 428   // there have more impact.
 429   const bool is_browser = !command_line.HasSwitch(switches::kProcessType);
 430   ObjcEvilDoers::ZombieEnable(true, is_browser ? 10000 : 1000);
 431
 432   SetUpBundleOverrides();
 433   chrome::common::mac::EnableCFBundleBlocker();
 434 #endif
 435
 436   Profiling::ProcessStarted();
 437
 438   base::trace_event::TraceLog::GetInstance()->SetArgumentFilterPredicate(
 439       base::Bind(&IsTraceEventArgsWhitelisted));
 440
 441 #if defined(OS_WIN)
 442   v8_breakpad_support::SetUp();
 443 #endif
 444
 445 #if defined(OS_POSIX)
 446   if (HandleVersionSwitches(command_line)) {
 447     *exit_code = 0;
 448     return true;  // Got a --version switch; exit with a success error code.
 449   }
 450 #if !defined(OS_MACOSX) && !defined(OS_CHROMEOS)
 451   // This will directly exit if the user asked for help.
 452   HandleHelpSwitches(command_line);
 453 #endif
 454 #endif  // OS_POSIX
 455
 456 #if defined(OS_WIN)
 457   // Must do this before any other usage of command line!
 458   if (HasDeprecatedArguments(command_line.GetCommandLineString())) {
 459     *exit_code = 1;
 460     return true;
 461   }
 462
 463   InstallCloseHandleHooks();
 464 #endif
 465
 466   chrome::RegisterPathProvider();
 467 #if defined(OS_CHROMEOS)
 468   chromeos::RegisterPathProvider();
 469 #endif
 470 #if !defined(DISABLE_NACL) && defined(OS_LINUX)
 471   nacl::RegisterPathProvider();
 472 #endif
 473
 474   ContentSettingsPattern::SetNonWildcardDomainNonPortScheme(
 475       extensions::kExtensionScheme);
 476
 477 // No support for ANDROID yet as DiagnosticsController needs wchar support.
 478 // TODO(gspencer): That's not true anymore, or at least there are no w-string
 479 // references anymore. Not sure if that means this can be enabled on Android or
 480 // not though.  As there is no easily accessible command line on Android, I'm
 481 // not sure this is a big deal.
 482 #if !defined(OS_ANDROID) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 483   // If we are in diagnostics mode this is the end of the line: after the
 484   // diagnostics are run the process will invariably exit.
 485   if (command_line.HasSwitch(switches::kDiagnostics)) {
 486     diagnostics::DiagnosticsWriter::FormatType format =
 487         diagnostics::DiagnosticsWriter::HUMAN;
 488     if (command_line.HasSwitch(switches::kDiagnosticsFormat)) {
 489       std::string format_str =
 490           command_line.GetSwitchValueASCII(switches::kDiagnosticsFormat);
 491       if (format_str == "machine") {
 492         format = diagnostics::DiagnosticsWriter::MACHINE;
 493       } else if (format_str == "log") {
 494         format = diagnostics::DiagnosticsWriter::LOG;
 495       } else {
 496         DCHECK_EQ("human", format_str);
 497       }
 498     }
 499
 500     diagnostics::DiagnosticsWriter writer(format);
 501     *exit_code = diagnostics::DiagnosticsController::GetInstance()->Run(
 502         command_line, &writer);
 503     diagnostics::DiagnosticsController::GetInstance()->ClearResults();
 504     return true;
 505   }
 506 #endif
 507
 508 #if defined(OS_CHROMEOS)
 509   // Initialize primary user homedir (in multi-profile session) as it may be
 510   // passed as a command line switch.
 511   base::FilePath homedir;
 512   if (command_line.HasSwitch(chromeos::switches::kHomedir)) {
 513     homedir = base::FilePath(
 514         command_line.GetSwitchValueASCII(chromeos::switches::kHomedir));
 515     PathService::OverrideAndCreateIfNeeded(
 516         base::DIR_HOME, homedir, true, false);
 517   }
 518
 519   // If we are recovering from a crash on ChromeOS, then we will do some
 520   // recovery using the diagnostics module, and then continue on. We fake up a
 521   // command line to tell it that we want it to recover, and to preserve the
 522   // original command line.
 523   if (command_line.HasSwitch(chromeos::switches::kLoginUser) ||
 524       command_line.HasSwitch(switches::kDiagnosticsRecovery)) {
 525     // The statistics subsystem needs get initialized soon enough for the
 526     // statistics to be collected.  It's safe to call this more than once.
 527     base::StatisticsRecorder::Initialize();
 528
 529     base::CommandLine interim_command_line(command_line.GetProgram());
 530     const char* const kSwitchNames[] = {switches::kUserDataDir, };
 531     interim_command_line.CopySwitchesFrom(
 532         command_line, kSwitchNames, arraysize(kSwitchNames));
 533     interim_command_line.AppendSwitch(switches::kDiagnostics);
 534     interim_command_line.AppendSwitch(switches::kDiagnosticsRecovery);
 535
 536     diagnostics::DiagnosticsWriter::FormatType format =
 537         diagnostics::DiagnosticsWriter::LOG;
 538     if (command_line.HasSwitch(switches::kDiagnosticsFormat)) {
 539       std::string format_str =
 540           command_line.GetSwitchValueASCII(switches::kDiagnosticsFormat);
 541       if (format_str == "machine") {
 542         format = diagnostics::DiagnosticsWriter::MACHINE;
 543       } else if (format_str == "human") {
 544         format = diagnostics::DiagnosticsWriter::HUMAN;
 545       } else {
 546         DCHECK_EQ("log", format_str);
 547       }
 548     }
 549
 550     diagnostics::DiagnosticsWriter writer(format);
 551     int diagnostics_exit_code =
 552         diagnostics::DiagnosticsController::GetInstance()->Run(command_line,
 553                                                                &writer);
 554     if (diagnostics_exit_code) {
 555       // Diagnostics has failed somehow, so we exit.
 556       *exit_code = diagnostics_exit_code;
 557       return true;
 558     }
 559
 560     // Now we run the actual recovery tasks.
 561     int recovery_exit_code =
 562         diagnostics::DiagnosticsController::GetInstance()->RunRecovery(
 563             command_line, &writer);
 564
 565     if (recovery_exit_code) {
 566       // Recovery has failed somehow, so we exit.
 567       *exit_code = recovery_exit_code;
 568       return true;
 569     }
 570   } else {  // Not running diagnostics or recovery.
 571     diagnostics::DiagnosticsController::GetInstance()->RecordRegularStartup();
 572   }
 573 #endif
 574
 575   content::SetContentClient(&chrome_content_client_);
 576
 577   return false;
 578 }
 579
 580 #if defined(OS_MACOSX)
 581 void ChromeMainDelegate::InitMacCrashReporter(
 582     const base::CommandLine& command_line,
 583     const std::string& process_type) {
 584   // TODO(mark): Right now, InitializeCrashpad() needs to be called after
 585   // CommandLine::Init() and chrome::RegisterPathProvider().  Ideally, Crashpad
 586   // initialization could occur sooner, preferably even before the framework
 587   // dylib is even loaded, to catch potential early crashes.
 588   crash_reporter::InitializeCrashpad(process_type);
 589
 590   const bool browser_process = process_type.empty();
 591   if (!browser_process) {
 592     std::string metrics_client_id =
 593         command_line.GetSwitchValueASCII(switches::kMetricsClientID);
 594     crash_keys::SetMetricsClientIdFromGUID(metrics_client_id);
 595   }
 596
 597   // Mac Chrome is packaged with a main app bundle and a helper app bundle.
 598   // The main app bundle should only be used for the browser process, so it
 599   // should never see a --type switch (switches::kProcessType).  Likewise,
 600   // the helper should always have a --type switch.
 601   //
 602   // This check is done this late so there is already a call to
 603   // base::mac::IsBackgroundOnlyProcess(), so there is no change in
 604   // startup/initialization order.
 605
 606   // The helper's Info.plist marks it as a background only app.
 607   if (base::mac::IsBackgroundOnlyProcess()) {
 608     CHECK(command_line.HasSwitch(switches::kProcessType) &&
 609           !process_type.empty())
 610         << "Helper application requires --type.";
 611
 612     // In addition, some helper flavors only work with certain process types.
 613     base::FilePath executable;
 614     if (PathService::Get(base::FILE_EXE, &executable) &&
 615         executable.value().size() >= 3) {
 616       std::string last_three =
 617           executable.value().substr(executable.value().size() - 3);
 618
 619       if (last_three == " EH") {
 620         CHECK(process_type == switches::kPluginProcess ||
 621               process_type == switches::kUtilityProcess)
 622             << "Executable-heap process requires --type="
 623             << switches::kPluginProcess << " or "
 624             << switches::kUtilityProcess << ", saw " << process_type;
 625       } else if (last_three == " NP") {
 626 #if !defined(DISABLE_NACL)
 627         CHECK_EQ(switches::kNaClLoaderProcess, process_type)
 628             << "Non-PIE process requires --type="
 629             << switches::kNaClLoaderProcess << ", saw " << process_type;
 630 #endif
 631       } else {
 632 #if defined(DISABLE_NACL)
 633         CHECK(process_type != switches::kPluginProcess)
 634             << "Non-executable-heap PIE process is intolerant of --type="
 635             << switches::kPluginProcess;
 636 #else
 637         CHECK(process_type != switches::kPluginProcess &&
 638               process_type != switches::kNaClLoaderProcess)
 639             << "Non-executable-heap PIE process is intolerant of --type="
 640             << switches::kPluginProcess << " and "
 641             << switches::kNaClLoaderProcess << ", saw " << process_type;
 642 #endif
 643       }
 644     }
 645   } else {
 646     CHECK(!command_line.HasSwitch(switches::kProcessType) &&
 647           process_type.empty())
 648         << "Main application forbids --type, saw " << process_type;
 649   }
 650 }
 651 #endif  // defined(OS_MACOSX)
 652
 653 void ChromeMainDelegate::PreSandboxStartup() {
 654   const base::CommandLine& command_line =
 655       *base::CommandLine::ForCurrentProcess();
 656   std::string process_type =
 657       command_line.GetSwitchValueASCII(switches::kProcessType);
 658
 659 #if defined(OS_POSIX)
 660   crash_reporter::SetCrashReporterClient(g_chrome_crash_client.Pointer());
 661 #endif
 662
 663 #if defined(OS_MACOSX)
 664   // On the Mac, the child executable lives at a predefined location within
 665   // the app bundle's versioned directory.
 666   PathService::Override(content::CHILD_PROCESS_EXE,
 667                         chrome::GetVersionedDirectory().
 668                         Append(chrome::kHelperProcessExecutablePath));
 669
 670   InitMacCrashReporter(command_line, process_type);
 671 #endif
 672
 673 #if defined(OS_WIN)
 674   child_process_logging::Init();
 675 #endif
 676 #if defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX))
 677   // Create an instance of the CPU class to parse /proc/cpuinfo and cache
 678   // cpu_brand info.
 679   base::CPU cpu_info;
 680 #endif
 681
 682   // Initialize the user data dir for any process type that needs it.
 683   if (chrome::ProcessNeedsProfileDir(process_type))
 684     InitializeUserDataDir();
 685
 686   // Register component_updater PathProvider after DIR_USER_DATA overidden by
 687   // command line flags. Maybe move the chrome PathProvider down here also?
 688   component_updater::RegisterPathProvider(chrome::DIR_USER_DATA);
 689
 690   // Enable Message Loop related state asap.
 691   if (command_line.HasSwitch(switches::kMessageLoopHistogrammer))
 692     base::MessageLoop::EnableHistogrammer(true);
 693
 694 #if !defined(OS_ANDROID)
 695   // Android does InitLogging when library is loaded. Skip here.
 696   logging::OldFileDeletionState file_state =
 697       logging::APPEND_TO_OLD_LOG_FILE;
 698   if (process_type.empty()) {
 699     file_state = logging::DELETE_OLD_LOG_FILE;
 700   }
 701   logging::InitChromeLogging(command_line, file_state);
 702 #endif
 703
 704 #if defined(OS_WIN)
 705   // TODO(zturner): Throbber icons are still stored in chrome.dll, this can be
 706   // killed once those are merged into resources.pak.  See
 707   // GlassBrowserFrameView::InitThrobberIcons() and http://crbug.com/368327.
 708   ui::SetResourcesDataDLL(_AtlBaseModule.GetResourceInstance());
 709 #endif
 710
 711   if (SubprocessNeedsResourceBundle(process_type)) {
 712     // Initialize ResourceBundle which handles files loaded from external
 713     // sources.  The language should have been passed in to us from the
 714     // browser process as a command line flag.
 715 #if defined(DISABLE_NACL)
 716     DCHECK(command_line.HasSwitch(switches::kLang) ||
 717            process_type == switches::kZygoteProcess ||
 718            process_type == switches::kGpuProcess ||
 719            process_type == switches::kPpapiBrokerProcess ||
 720            process_type == switches::kPpapiPluginProcess);
 721 #else
 722     DCHECK(command_line.HasSwitch(switches::kLang) ||
 723            process_type == switches::kZygoteProcess ||
 724            process_type == switches::kGpuProcess ||
 725            process_type == switches::kNaClLoaderProcess ||
 726            process_type == switches::kPpapiBrokerProcess ||
 727            process_type == switches::kPpapiPluginProcess);
 728 #endif
 729
 730     // TODO(markusheintz): The command line flag --lang is actually processed
 731     // by the CommandLinePrefStore, and made available through the PrefService
 732     // via the preference prefs::kApplicationLocale. The browser process uses
 733     // the --lang flag to pass the value of the PrefService in here. Maybe
 734     // this value could be passed in a different way.
 735     const std::string locale =
 736         command_line.GetSwitchValueASCII(switches::kLang);
 737 #if defined(OS_ANDROID)
 738     // The renderer sandbox prevents us from accessing our .pak files directly.
 739     // Therefore file descriptors to the .pak files that we need are passed in
 740     // at process creation time.
 741     auto global_descriptors = base::GlobalDescriptors::GetInstance();
 742     int pak_fd = global_descriptors->Get(kAndroidLocalePakDescriptor);
 743     base::MemoryMappedFile::Region pak_region =
 744         global_descriptors->GetRegion(kAndroidLocalePakDescriptor);
 745     ResourceBundle::InitSharedInstanceWithPakFileRegion(base::File(pak_fd),
 746                                                         pak_region);
 747
 748     int extra_pak_keys[] = {
 749       kAndroidChrome100PercentPakDescriptor,
 750       kAndroidUIResourcesPakDescriptor,
 751     };
 752     for (size_t i = 0; i < arraysize(extra_pak_keys); ++i) {
 753       pak_fd = global_descriptors->Get(extra_pak_keys[i]);
 754       pak_region = global_descriptors->GetRegion(extra_pak_keys[i]);
 755       ResourceBundle::GetSharedInstance().AddDataPackFromFileRegion(
 756           base::File(pak_fd), pak_region, ui::SCALE_FACTOR_100P);
 757     }
 758
 759     base::i18n::SetICUDefaultLocale(locale);
 760     const std::string loaded_locale = locale;
 761 #else
 762     const std::string loaded_locale =
 763         ui::ResourceBundle::InitSharedInstanceWithLocale(
 764             locale, NULL, ui::ResourceBundle::LOAD_COMMON_RESOURCES);
 765
 766     base::FilePath resources_pack_path;
 767     PathService::Get(chrome::FILE_RESOURCES_PACK, &resources_pack_path);
 768     ResourceBundle::GetSharedInstance().AddDataPackFromPath(
 769         resources_pack_path, ui::SCALE_FACTOR_NONE);
 770 #endif
 771     CHECK(!loaded_locale.empty()) << "Locale could not be found for " <<
 772         locale;
 773   }
 774
 775 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 776   if (process_type == switches::kUtilityProcess ||
 777       process_type == switches::kZygoteProcess) {
 778     ChromeContentUtilityClient::PreSandboxStartup();
 779   }
 780
 781   chrome::InitializePDF();
 782 #endif
 783
 784 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 785   // Zygote needs to call InitCrashReporter() in RunZygote().
 786   if (process_type != switches::kZygoteProcess) {
 787 #if defined(OS_ANDROID)
 788     if (process_type.empty()) {
 789       breakpad::InitCrashReporter(process_type);
 790       chrome::android::InitJavaExceptionReporter();
 791     } else {
 792       breakpad::InitNonBrowserCrashReporterForAndroid(process_type);
 793     }
 794 #else  // !defined(OS_ANDROID)
 795     breakpad::InitCrashReporter(process_type);
 796 #endif  // defined(OS_ANDROID)
 797   }
 798 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
 799
 800   // After all the platform Breakpads have been initialized, store the command
 801   // line for crash reporting.
 802   crash_keys::SetSwitchesFromCommandLine(&command_line);
 803 }
 804
 805 void ChromeMainDelegate::SandboxInitialized(const std::string& process_type) {
 806   // Note: If you are adding a new process type below, be sure to adjust the
 807   // AdjustLinuxOOMScore function too.
 808 #if defined(OS_LINUX)
 809   AdjustLinuxOOMScore(process_type);
 810 #endif
 811 #if defined(OS_WIN)
 812   SuppressWindowsErrorDialogs();
 813 #endif
 814
 815 #if defined(CHROME_MULTIPLE_DLL_CHILD) || !defined(CHROME_MULTIPLE_DLL_BROWSER)
 816 #if !defined(DISABLE_NACL)
 817   ChromeContentClient::SetNaClEntryFunctions(
 818       nacl_plugin::PPP_GetInterface,
 819       nacl_plugin::PPP_InitializeModule,
 820       nacl_plugin::PPP_ShutdownModule);
 821 #endif
 822 #if defined(ENABLE_PLUGINS)
 823   ChromeContentClient::SetPDFEntryFunctions(
 824       chrome_pdf::PPP_GetInterface,
 825       chrome_pdf::PPP_InitializeModule,
 826       chrome_pdf::PPP_ShutdownModule);
 827 #endif
 828 #endif
 829 }
 830
 831 int ChromeMainDelegate::RunProcess(
 832     const std::string& process_type,
 833     const content::MainFunctionParams& main_function_params) {
 834   // ANDROID doesn't support "service", so no ServiceProcessMain, and arraysize
 835   // doesn't support empty array. So we comment out the block for Android.
 836 #if !defined(OS_ANDROID)
 837   static const MainFunction kMainFunctions[] = {
 838 #if defined(ENABLE_PRINT_PREVIEW) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 839     { switches::kServiceProcess,     ServiceProcessMain },
 840 #endif
 841
 842 #if defined(OS_MACOSX)
 843     { switches::kRelauncherProcess,
 844       mac_relauncher::internal::RelauncherMain },
 845 #endif
 846
 847     // This entry is not needed on Linux, where the NaCl loader
 848     // process is launched via nacl_helper instead.
 849 #if !defined(DISABLE_NACL) && !defined(CHROME_MULTIPLE_DLL_BROWSER) && \
 850     !defined(OS_LINUX)
 851     { switches::kNaClLoaderProcess,  NaClMain },
 852 #else
 853     { "<invalid>", NULL },  // To avoid constant array of size 0
 854                             // when DISABLE_NACL and CHROME_MULTIPLE_DLL_CHILD
 855 #endif  // DISABLE_NACL
 856   };
 857
 858   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 859     if (process_type == kMainFunctions[i].name)
 860       return kMainFunctions[i].function(main_function_params);
 861   }
 862 #endif
 863
 864   return -1;
 865 }
 866
 867 void ChromeMainDelegate::ProcessExiting(const std::string& process_type) {
 868   if (SubprocessNeedsResourceBundle(process_type))
 869     ResourceBundle::CleanupSharedInstance();
 870 #if !defined(OS_ANDROID)
 871   logging::CleanupChromeLogging();
 872 #else
 873   // Android doesn't use InitChromeLogging, so we close the log file manually.
 874   logging::CloseLogFile();
 875 #endif  // !defined(OS_ANDROID)
 876
 877 #if defined(OS_WIN)
 878   RemoveCloseHandleHooks();
 879 #endif
 880 }
 881
 882 #if defined(OS_MACOSX)
 883 bool ChromeMainDelegate::ProcessRegistersWithSystemProcess(
 884     const std::string& process_type) {
 885 #if defined(DISABLE_NACL)
 886   return false;
 887 #else
 888   return process_type == switches::kNaClLoaderProcess;
 889 #endif
 890 }
 891
 892 bool ChromeMainDelegate::ShouldSendMachPort(const std::string& process_type) {
 893   return process_type != switches::kRelauncherProcess &&
 894       process_type != switches::kServiceProcess;
 895 }
 896
 897 bool ChromeMainDelegate::DelaySandboxInitialization(
 898     const std::string& process_type) {
 899 #if !defined(DISABLE_NACL)
 900   // NaClLoader does this in NaClMainPlatformDelegate::EnableSandbox().
 901   // No sandbox needed for relauncher.
 902   if (process_type == switches::kNaClLoaderProcess)
 903     return true;
 904 #endif
 905   return process_type == switches::kRelauncherProcess;
 906 }
 907 #elif defined(OS_POSIX) && !defined(OS_ANDROID)
 908 void ChromeMainDelegate::ZygoteStarting(
 909     ScopedVector<content::ZygoteForkDelegate>* delegates) {
 910 #if !defined(DISABLE_NACL)
 911   nacl::AddNaClZygoteForkDelegates(delegates);
 912 #endif
 913 }
 914
 915 void ChromeMainDelegate::ZygoteForked() {
 916   Profiling::ProcessStarted();
 917   if (Profiling::BeingProfiled()) {
 918     base::debug::RestartProfilingAfterFork();
 919     SetUpProfilingShutdownHandler();
 920   }
 921
 922   // Needs to be called after we have chrome::DIR_USER_DATA.  BrowserMain sets
 923   // this up for the browser process in a different manner.
 924   const base::CommandLine* command_line =
 925       base::CommandLine::ForCurrentProcess();
 926   std::string process_type =
 927       command_line->GetSwitchValueASCII(switches::kProcessType);
 928   breakpad::InitCrashReporter(process_type);
 929
 930   // Reset the command line for the newly spawned process.
 931   crash_keys::SetSwitchesFromCommandLine(command_line);
 932 }
 933
 934 #endif  // OS_MACOSX
 935
 936 content::ContentBrowserClient*
 937 ChromeMainDelegate::CreateContentBrowserClient() {
 938 #if defined(CHROME_MULTIPLE_DLL_CHILD)
 939   return NULL;
 940 #else
 941   return g_chrome_content_browser_client.Pointer();
 942 #endif
 943 }
 944
 945 content::ContentPluginClient* ChromeMainDelegate::CreateContentPluginClient() {
 946 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 947   return NULL;
 948 #else
 949   return g_chrome_content_plugin_client.Pointer();
 950 #endif
 951 }
 952
 953 content::ContentRendererClient*
 954 ChromeMainDelegate::CreateContentRendererClient() {
 955 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 956   return NULL;
 957 #else
 958   return g_chrome_content_renderer_client.Pointer();
 959 #endif
 960 }
 961
 962 content::ContentUtilityClient*
 963 ChromeMainDelegate::CreateContentUtilityClient() {
 964 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 965   return NULL;
 966 #else
 967   return g_chrome_content_utility_client.Pointer();
 968 #endif
 969 }
 970
 971 bool ChromeMainDelegate::ShouldEnableProfilerRecording() {
 972   switch (chrome::GetChannel()) {
 973     case version_info::Channel::UNKNOWN:
 974     case version_info::Channel::CANARY:
 975       return true;
 976     case version_info::Channel::DEV:
 977     case version_info::Channel::BETA:
 978     case version_info::Channel::STABLE:
 979     default:
 980       // Don't enable instrumentation.
 981       return false;
 982   }
 983 }