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/process/process_info.h"
  19 #include "base/strings/string_util.h"
  20 #include "base/time/time.h"
  21 #include "base/trace_event/trace_event_impl.h"
  22 #include "build/build_config.h"
  23 #include "chrome/browser/chrome_content_browser_client.h"
  24 #include "chrome/browser/defaults.h"
  25 #include "chrome/common/channel_info.h"
  26 #include "chrome/common/chrome_constants.h"
  27 #include "chrome/common/chrome_content_client.h"
  28 #include "chrome/common/chrome_paths.h"
  29 #include "chrome/common/chrome_paths_internal.h"
  30 #include "chrome/common/chrome_result_codes.h"
  31 #include "chrome/common/chrome_switches.h"
  32 #include "chrome/common/crash_keys.h"
  33 #include "chrome/common/logging_chrome.h"
  34 #include "chrome/common/profiling.h"
  35 #include "chrome/common/switch_utils.h"
  36 #include "chrome/common/trace_event_args_whitelist.h"
  37 #include "chrome/common/url_constants.h"
  38 #include "chrome/plugin/chrome_content_plugin_client.h"
  39 #include "chrome/renderer/chrome_content_renderer_client.h"
  40 #include "chrome/utility/chrome_content_utility_client.h"
  41 #include "components/component_updater/component_updater_paths.h"
  42 #include "components/content_settings/core/common/content_settings_pattern.h"
  43 #include "components/startup_metric_utils/startup_metric_utils.h"
  44 #include "components/version_info/version_info.h"
  45 #include "content/public/common/content_client.h"
  46 #include "content/public/common/content_paths.h"
  47 #include "extensions/common/constants.h"
  48 #include "ui/base/ui_base_switches.h"
  49
  50 #if defined(OS_WIN)
  51 #include <atlbase.h>
  52 #include <malloc.h>
  53 #include <algorithm>
  54 #include "chrome/app/close_handle_hook_win.h"
  55 #include "chrome/common/child_process_logging.h"
  56 #include "chrome/common/v8_breakpad_support_win.h"
  57 #include "sandbox/win/src/sandbox.h"
  58 #include "ui/base/resource/resource_bundle_win.h"
  59 #endif
  60
  61 #if defined(OS_MACOSX)
  62 #include "base/mac/foundation_util.h"
  63 #include "chrome/app/chrome_main_mac.h"
  64 #include "chrome/browser/mac/relauncher.h"
  65 #include "chrome/common/mac/cfbundle_blocker.h"
  66 #include "chrome/common/mac/objc_zombie.h"
  67 #include "components/crash/app/crashpad_mac.h"
  68 #include "ui/base/l10n/l10n_util_mac.h"
  69 #endif
  70
  71 #if defined(OS_POSIX)
  72 #include <locale.h>
  73 #include <signal.h>
  74 #include "chrome/app/chrome_crash_reporter_client.h"
  75 #include "components/crash/app/crash_reporter_client.h"
  76 #endif
  77
  78 #if !defined(DISABLE_NACL) && defined(OS_LINUX)
  79 #include "components/nacl/common/nacl_paths.h"
  80 #include "components/nacl/zygote/nacl_fork_delegate_linux.h"
  81 #endif
  82
  83 #if defined(OS_CHROMEOS)
  84 #include "base/sys_info.h"
  85 #include "chrome/browser/chromeos/boot_times_recorder.h"
  86 #include "chromeos/chromeos_paths.h"
  87 #include "chromeos/chromeos_switches.h"
  88 #endif
  89
  90 #if defined(OS_ANDROID)
  91 #include "chrome/browser/android/java_exception_reporter.h"
  92 #include "chrome/common/descriptors_android.h"
  93 #else
  94 // Diagnostics is only available on non-android platforms.
  95 #include "chrome/browser/diagnostics/diagnostics_controller.h"
  96 #include "chrome/browser/diagnostics/diagnostics_writer.h"
  97 #endif
  98
  99 #if defined(USE_X11)
 100 #include <stdlib.h>
 101 #include <string.h>
 102 #include "ui/base/x/x11_util.h"
 103 #endif
 104
 105 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 106 #include "components/crash/app/breakpad_linux.h"
 107 #endif
 108
 109 #if defined(OS_LINUX)
 110 #include "base/environment.h"
 111 #endif
 112
 113 #if defined(OS_MACOSX) || defined(OS_WIN)
 114 #include "chrome/browser/policy/policy_path_parser.h"
 115 #endif
 116
 117 #if !defined(DISABLE_NACL)
 118 #include "components/nacl/common/nacl_switches.h"
 119 #include "components/nacl/renderer/plugin/ppapi_entrypoints.h"
 120 #endif
 121
 122 #if defined(ENABLE_PLUGINS) && (defined(CHROME_MULTIPLE_DLL_CHILD) || \
 123     !defined(CHROME_MULTIPLE_DLL_BROWSER))
 124 #include "pdf/pdf.h"
 125 #endif
 126
 127 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 128 #include "chrome/child/pdf_child_init.h"
 129
 130 base::LazyInstance<ChromeContentRendererClient>
 131     g_chrome_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 132 base::LazyInstance<ChromeContentUtilityClient>
 133     g_chrome_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 134 base::LazyInstance<chrome::ChromeContentPluginClient>
 135     g_chrome_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 136 #endif
 137
 138 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 139 base::LazyInstance<chrome::ChromeContentBrowserClient>
 140     g_chrome_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 141 #endif
 142
 143 #if defined(OS_POSIX)
 144 base::LazyInstance<chrome::ChromeCrashReporterClient>::Leaky
 145     g_chrome_crash_client = LAZY_INSTANCE_INITIALIZER;
 146 #endif
 147
 148 extern int NaClMain(const content::MainFunctionParams&);
 149 extern int ServiceProcessMain(const content::MainFunctionParams&);
 150
 151 namespace {
 152
 153 #if defined(OS_WIN)
 154 // Early versions of Chrome incorrectly registered a chromehtml: URL handler,
 155 // which gives us nothing but trouble. Avoid launching chrome this way since
 156 // some apps fail to properly escape arguments.
 157 bool HasDeprecatedArguments(const base::string16& command_line) {
 158   const wchar_t kChromeHtml[] = L"chromehtml:";
 159   base::string16 command_line_lower = base::ToLowerASCII(command_line);
 160   // We are only searching for ASCII characters so this is OK.
 161   return (command_line_lower.find(kChromeHtml) != base::string16::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_MACOSX) || defined(OS_WIN) || defined(OS_LINUX)
 395   // Record the startup process creation time on supported platforms.
 396   startup_metric_utils::RecordStartupProcessCreationTime(
 397       base::CurrentProcessInfo::CreationTime());
 398 #endif
 399
 400 // On Android the main entry point time is the time when the Java code starts.
 401 // This happens before the shared library containing this code is even loaded.
 402 // The Java startup code has recorded that time, but the C++ code can't fetch it
 403 // from the Java side until it has initialized the JNI. See
 404 // ChromeMainDelegateAndroid.
 405 #if !defined(OS_ANDROID)
 406   startup_metric_utils::RecordMainEntryPointTime(base::Time::Now());
 407 #endif
 408 }
 409
 410 ChromeMainDelegate::~ChromeMainDelegate() {
 411 }
 412
 413 bool ChromeMainDelegate::BasicStartupComplete(int* exit_code) {
 414 #if defined(OS_CHROMEOS)
 415   chromeos::BootTimesRecorder::Get()->SaveChromeMainStats();
 416 #endif
 417
 418   const base::CommandLine& command_line =
 419       *base::CommandLine::ForCurrentProcess();
 420
 421
 422 #if defined(OS_WIN)
 423   // Browser should not be sandboxed.
 424   const bool is_browser = !command_line.HasSwitch(switches::kProcessType);
 425   if (is_browser && IsSandboxedProcess()) {
 426     *exit_code = chrome::RESULT_CODE_INVALID_SANDBOX_STATE;
 427     return true;
 428   }
 429 #endif
 430
 431 #if defined(OS_MACOSX)
 432   // Give the browser process a longer treadmill, since crashes
 433   // there have more impact.
 434   const bool is_browser = !command_line.HasSwitch(switches::kProcessType);
 435   ObjcEvilDoers::ZombieEnable(true, is_browser ? 10000 : 1000);
 436
 437   SetUpBundleOverrides();
 438   chrome::common::mac::EnableCFBundleBlocker();
 439 #endif
 440
 441   Profiling::ProcessStarted();
 442
 443   base::trace_event::TraceLog::GetInstance()->SetArgumentFilterPredicate(
 444       base::Bind(&IsTraceEventArgsWhitelisted));
 445
 446 #if defined(OS_WIN)
 447   v8_breakpad_support::SetUp();
 448 #endif
 449
 450 #if defined(OS_POSIX)
 451   if (HandleVersionSwitches(command_line)) {
 452     *exit_code = 0;
 453     return true;  // Got a --version switch; exit with a success error code.
 454   }
 455 #if !defined(OS_MACOSX) && !defined(OS_CHROMEOS)
 456   // This will directly exit if the user asked for help.
 457   HandleHelpSwitches(command_line);
 458 #endif
 459 #endif  // OS_POSIX
 460
 461 #if defined(OS_WIN)
 462   // Must do this before any other usage of command line!
 463   if (HasDeprecatedArguments(command_line.GetCommandLineString())) {
 464     *exit_code = 1;
 465     return true;
 466   }
 467
 468   InstallHandleHooks();
 469 #endif
 470
 471   chrome::RegisterPathProvider();
 472 #if defined(OS_CHROMEOS)
 473   chromeos::RegisterPathProvider();
 474 #endif
 475 #if !defined(DISABLE_NACL) && defined(OS_LINUX)
 476   nacl::RegisterPathProvider();
 477 #endif
 478
 479   ContentSettingsPattern::SetNonWildcardDomainNonPortScheme(
 480       extensions::kExtensionScheme);
 481
 482 // No support for ANDROID yet as DiagnosticsController needs wchar support.
 483 // TODO(gspencer): That's not true anymore, or at least there are no w-string
 484 // references anymore. Not sure if that means this can be enabled on Android or
 485 // not though.  As there is no easily accessible command line on Android, I'm
 486 // not sure this is a big deal.
 487 #if !defined(OS_ANDROID) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 488   // If we are in diagnostics mode this is the end of the line: after the
 489   // diagnostics are run the process will invariably exit.
 490   if (command_line.HasSwitch(switches::kDiagnostics)) {
 491     diagnostics::DiagnosticsWriter::FormatType format =
 492         diagnostics::DiagnosticsWriter::HUMAN;
 493     if (command_line.HasSwitch(switches::kDiagnosticsFormat)) {
 494       std::string format_str =
 495           command_line.GetSwitchValueASCII(switches::kDiagnosticsFormat);
 496       if (format_str == "machine") {
 497         format = diagnostics::DiagnosticsWriter::MACHINE;
 498       } else if (format_str == "log") {
 499         format = diagnostics::DiagnosticsWriter::LOG;
 500       } else {
 501         DCHECK_EQ("human", format_str);
 502       }
 503     }
 504
 505     diagnostics::DiagnosticsWriter writer(format);
 506     *exit_code = diagnostics::DiagnosticsController::GetInstance()->Run(
 507         command_line, &writer);
 508     diagnostics::DiagnosticsController::GetInstance()->ClearResults();
 509     return true;
 510   }
 511 #endif
 512
 513 #if defined(OS_CHROMEOS)
 514   // Initialize primary user homedir (in multi-profile session) as it may be
 515   // passed as a command line switch.
 516   base::FilePath homedir;
 517   if (command_line.HasSwitch(chromeos::switches::kHomedir)) {
 518     homedir = base::FilePath(
 519         command_line.GetSwitchValueASCII(chromeos::switches::kHomedir));
 520     PathService::OverrideAndCreateIfNeeded(
 521         base::DIR_HOME, homedir, true, false);
 522   }
 523
 524   // If we are recovering from a crash on ChromeOS, then we will do some
 525   // recovery using the diagnostics module, and then continue on. We fake up a
 526   // command line to tell it that we want it to recover, and to preserve the
 527   // original command line.
 528   if (command_line.HasSwitch(chromeos::switches::kLoginUser) ||
 529       command_line.HasSwitch(switches::kDiagnosticsRecovery)) {
 530     // The statistics subsystem needs get initialized soon enough for the
 531     // statistics to be collected.  It's safe to call this more than once.
 532     base::StatisticsRecorder::Initialize();
 533
 534     base::CommandLine interim_command_line(command_line.GetProgram());
 535     const char* const kSwitchNames[] = {switches::kUserDataDir, };
 536     interim_command_line.CopySwitchesFrom(
 537         command_line, kSwitchNames, arraysize(kSwitchNames));
 538     interim_command_line.AppendSwitch(switches::kDiagnostics);
 539     interim_command_line.AppendSwitch(switches::kDiagnosticsRecovery);
 540
 541     diagnostics::DiagnosticsWriter::FormatType format =
 542         diagnostics::DiagnosticsWriter::LOG;
 543     if (command_line.HasSwitch(switches::kDiagnosticsFormat)) {
 544       std::string format_str =
 545           command_line.GetSwitchValueASCII(switches::kDiagnosticsFormat);
 546       if (format_str == "machine") {
 547         format = diagnostics::DiagnosticsWriter::MACHINE;
 548       } else if (format_str == "human") {
 549         format = diagnostics::DiagnosticsWriter::HUMAN;
 550       } else {
 551         DCHECK_EQ("log", format_str);
 552       }
 553     }
 554
 555     diagnostics::DiagnosticsWriter writer(format);
 556     int diagnostics_exit_code =
 557         diagnostics::DiagnosticsController::GetInstance()->Run(command_line,
 558                                                                &writer);
 559     if (diagnostics_exit_code) {
 560       // Diagnostics has failed somehow, so we exit.
 561       *exit_code = diagnostics_exit_code;
 562       return true;
 563     }
 564
 565     // Now we run the actual recovery tasks.
 566     int recovery_exit_code =
 567         diagnostics::DiagnosticsController::GetInstance()->RunRecovery(
 568             command_line, &writer);
 569
 570     if (recovery_exit_code) {
 571       // Recovery has failed somehow, so we exit.
 572       *exit_code = recovery_exit_code;
 573       return true;
 574     }
 575   } else {  // Not running diagnostics or recovery.
 576     diagnostics::DiagnosticsController::GetInstance()->RecordRegularStartup();
 577   }
 578 #endif
 579
 580   content::SetContentClient(&chrome_content_client_);
 581
 582   return false;
 583 }
 584
 585 #if defined(OS_MACOSX)
 586 void ChromeMainDelegate::InitMacCrashReporter(
 587     const base::CommandLine& command_line,
 588     const std::string& process_type) {
 589   // TODO(mark): Right now, InitializeCrashpad() needs to be called after
 590   // CommandLine::Init() and chrome::RegisterPathProvider().  Ideally, Crashpad
 591   // initialization could occur sooner, preferably even before the framework
 592   // dylib is even loaded, to catch potential early crashes.
 593   crash_reporter::InitializeCrashpad(process_type);
 594
 595   const bool browser_process = process_type.empty();
 596   if (!browser_process) {
 597     std::string metrics_client_id =
 598         command_line.GetSwitchValueASCII(switches::kMetricsClientID);
 599     crash_keys::SetMetricsClientIdFromGUID(metrics_client_id);
 600   }
 601
 602   // Mac Chrome is packaged with a main app bundle and a helper app bundle.
 603   // The main app bundle should only be used for the browser process, so it
 604   // should never see a --type switch (switches::kProcessType).  Likewise,
 605   // the helper should always have a --type switch.
 606   //
 607   // This check is done this late so there is already a call to
 608   // base::mac::IsBackgroundOnlyProcess(), so there is no change in
 609   // startup/initialization order.
 610
 611   // The helper's Info.plist marks it as a background only app.
 612   if (base::mac::IsBackgroundOnlyProcess()) {
 613     CHECK(command_line.HasSwitch(switches::kProcessType) &&
 614           !process_type.empty())
 615         << "Helper application requires --type.";
 616
 617     // In addition, some helper flavors only work with certain process types.
 618     base::FilePath executable;
 619     if (PathService::Get(base::FILE_EXE, &executable) &&
 620         executable.value().size() >= 3) {
 621       std::string last_three =
 622           executable.value().substr(executable.value().size() - 3);
 623
 624       if (last_three == " EH") {
 625         CHECK(process_type == switches::kPluginProcess ||
 626               process_type == switches::kUtilityProcess)
 627             << "Executable-heap process requires --type="
 628             << switches::kPluginProcess << " or "
 629             << switches::kUtilityProcess << ", saw " << process_type;
 630       } else {
 631         CHECK(process_type != switches::kPluginProcess)
 632             << "Non-executable-heap PIE process is intolerant of --type="
 633             << switches::kPluginProcess;
 634       }
 635     }
 636   } else {
 637     CHECK(!command_line.HasSwitch(switches::kProcessType) &&
 638           process_type.empty())
 639         << "Main application forbids --type, saw " << process_type;
 640   }
 641 }
 642 #endif  // defined(OS_MACOSX)
 643
 644 void ChromeMainDelegate::PreSandboxStartup() {
 645   const base::CommandLine& command_line =
 646       *base::CommandLine::ForCurrentProcess();
 647   std::string process_type =
 648       command_line.GetSwitchValueASCII(switches::kProcessType);
 649
 650 #if defined(OS_POSIX)
 651   crash_reporter::SetCrashReporterClient(g_chrome_crash_client.Pointer());
 652 #endif
 653
 654 #if defined(OS_MACOSX)
 655   // On the Mac, the child executable lives at a predefined location within
 656   // the app bundle's versioned directory.
 657   PathService::Override(content::CHILD_PROCESS_EXE,
 658                         chrome::GetVersionedDirectory().
 659                         Append(chrome::kHelperProcessExecutablePath));
 660
 661   InitMacCrashReporter(command_line, process_type);
 662 #endif
 663
 664 #if defined(OS_WIN)
 665   child_process_logging::Init();
 666 #endif
 667 #if defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX))
 668   // Create an instance of the CPU class to parse /proc/cpuinfo and cache
 669   // cpu_brand info.
 670   base::CPU cpu_info;
 671 #endif
 672
 673   // Initialize the user data dir for any process type that needs it.
 674   if (chrome::ProcessNeedsProfileDir(process_type))
 675     InitializeUserDataDir();
 676
 677   // Register component_updater PathProvider after DIR_USER_DATA overidden by
 678   // command line flags. Maybe move the chrome PathProvider down here also?
 679   component_updater::RegisterPathProvider(chrome::DIR_USER_DATA);
 680
 681   // Enable Message Loop related state asap.
 682   if (command_line.HasSwitch(switches::kMessageLoopHistogrammer))
 683     base::MessageLoop::EnableHistogrammer(true);
 684
 685 #if !defined(OS_ANDROID)
 686   // Android does InitLogging when library is loaded. Skip here.
 687   logging::OldFileDeletionState file_state =
 688       logging::APPEND_TO_OLD_LOG_FILE;
 689   if (process_type.empty()) {
 690     file_state = logging::DELETE_OLD_LOG_FILE;
 691   }
 692   logging::InitChromeLogging(command_line, file_state);
 693 #endif
 694
 695 #if defined(OS_WIN)
 696   // TODO(zturner): Throbber icons are still stored in chrome.dll, this can be
 697   // killed once those are merged into resources.pak.  See
 698   // GlassBrowserFrameView::InitThrobberIcons() and http://crbug.com/368327.
 699   ui::SetResourcesDataDLL(_AtlBaseModule.GetResourceInstance());
 700 #endif
 701
 702   if (SubprocessNeedsResourceBundle(process_type)) {
 703     // Initialize ResourceBundle which handles files loaded from external
 704     // sources.  The language should have been passed in to us from the
 705     // browser process as a command line flag.
 706 #if defined(DISABLE_NACL)
 707     DCHECK(command_line.HasSwitch(switches::kLang) ||
 708            process_type == switches::kZygoteProcess ||
 709            process_type == switches::kGpuProcess ||
 710            process_type == switches::kPpapiBrokerProcess ||
 711            process_type == switches::kPpapiPluginProcess);
 712 #else
 713     DCHECK(command_line.HasSwitch(switches::kLang) ||
 714            process_type == switches::kZygoteProcess ||
 715            process_type == switches::kGpuProcess ||
 716            process_type == switches::kNaClLoaderProcess ||
 717            process_type == switches::kPpapiBrokerProcess ||
 718            process_type == switches::kPpapiPluginProcess);
 719 #endif
 720
 721     // TODO(markusheintz): The command line flag --lang is actually processed
 722     // by the CommandLinePrefStore, and made available through the PrefService
 723     // via the preference prefs::kApplicationLocale. The browser process uses
 724     // the --lang flag to pass the value of the PrefService in here. Maybe
 725     // this value could be passed in a different way.
 726     const std::string locale =
 727         command_line.GetSwitchValueASCII(switches::kLang);
 728 #if defined(OS_ANDROID)
 729     // The renderer sandbox prevents us from accessing our .pak files directly.
 730     // Therefore file descriptors to the .pak files that we need are passed in
 731     // at process creation time.
 732     auto global_descriptors = base::GlobalDescriptors::GetInstance();
 733     int pak_fd = global_descriptors->Get(kAndroidLocalePakDescriptor);
 734     base::MemoryMappedFile::Region pak_region =
 735         global_descriptors->GetRegion(kAndroidLocalePakDescriptor);
 736     ResourceBundle::InitSharedInstanceWithPakFileRegion(base::File(pak_fd),
 737                                                         pak_region);
 738
 739     int extra_pak_keys[] = {
 740       kAndroidChrome100PercentPakDescriptor,
 741       kAndroidUIResourcesPakDescriptor,
 742     };
 743     for (size_t i = 0; i < arraysize(extra_pak_keys); ++i) {
 744       pak_fd = global_descriptors->Get(extra_pak_keys[i]);
 745       pak_region = global_descriptors->GetRegion(extra_pak_keys[i]);
 746       ResourceBundle::GetSharedInstance().AddDataPackFromFileRegion(
 747           base::File(pak_fd), pak_region, ui::SCALE_FACTOR_100P);
 748     }
 749
 750     base::i18n::SetICUDefaultLocale(locale);
 751     const std::string loaded_locale = locale;
 752 #else
 753     const std::string loaded_locale =
 754         ui::ResourceBundle::InitSharedInstanceWithLocale(
 755             locale, NULL, ui::ResourceBundle::LOAD_COMMON_RESOURCES);
 756
 757     base::FilePath resources_pack_path;
 758     PathService::Get(chrome::FILE_RESOURCES_PACK, &resources_pack_path);
 759     ResourceBundle::GetSharedInstance().AddDataPackFromPath(
 760         resources_pack_path, ui::SCALE_FACTOR_NONE);
 761 #endif
 762     CHECK(!loaded_locale.empty()) << "Locale could not be found for " <<
 763         locale;
 764   }
 765
 766 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 767   if (process_type == switches::kUtilityProcess ||
 768       process_type == switches::kZygoteProcess) {
 769     ChromeContentUtilityClient::PreSandboxStartup();
 770   }
 771
 772   chrome::InitializePDF();
 773 #endif
 774
 775 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 776   // Zygote needs to call InitCrashReporter() in RunZygote().
 777   if (process_type != switches::kZygoteProcess) {
 778 #if defined(OS_ANDROID)
 779     if (process_type.empty()) {
 780       breakpad::InitCrashReporter(process_type);
 781       chrome::android::InitJavaExceptionReporter();
 782     } else {
 783       breakpad::InitNonBrowserCrashReporterForAndroid(process_type);
 784     }
 785 #else  // !defined(OS_ANDROID)
 786     breakpad::InitCrashReporter(process_type);
 787 #endif  // defined(OS_ANDROID)
 788   }
 789 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
 790
 791   // After all the platform Breakpads have been initialized, store the command
 792   // line for crash reporting.
 793   crash_keys::SetSwitchesFromCommandLine(&command_line);
 794 }
 795
 796 void ChromeMainDelegate::SandboxInitialized(const std::string& process_type) {
 797   // Note: If you are adding a new process type below, be sure to adjust the
 798   // AdjustLinuxOOMScore function too.
 799 #if defined(OS_LINUX)
 800   AdjustLinuxOOMScore(process_type);
 801 #endif
 802 #if defined(OS_WIN)
 803   SuppressWindowsErrorDialogs();
 804 #endif
 805
 806 #if defined(CHROME_MULTIPLE_DLL_CHILD) || !defined(CHROME_MULTIPLE_DLL_BROWSER)
 807 #if !defined(DISABLE_NACL)
 808   ChromeContentClient::SetNaClEntryFunctions(
 809       nacl_plugin::PPP_GetInterface,
 810       nacl_plugin::PPP_InitializeModule,
 811       nacl_plugin::PPP_ShutdownModule);
 812 #endif
 813 #if defined(ENABLE_PLUGINS) && defined(ENABLE_PDF)
 814   ChromeContentClient::SetPDFEntryFunctions(
 815       chrome_pdf::PPP_GetInterface,
 816       chrome_pdf::PPP_InitializeModule,
 817       chrome_pdf::PPP_ShutdownModule);
 818 #endif
 819 #endif
 820 }
 821
 822 int ChromeMainDelegate::RunProcess(
 823     const std::string& process_type,
 824     const content::MainFunctionParams& main_function_params) {
 825   // ANDROID doesn't support "service", so no ServiceProcessMain, and arraysize
 826   // doesn't support empty array. So we comment out the block for Android.
 827 #if !defined(OS_ANDROID)
 828   static const MainFunction kMainFunctions[] = {
 829 #if defined(ENABLE_PRINT_PREVIEW) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 830     { switches::kServiceProcess,     ServiceProcessMain },
 831 #endif
 832
 833 #if defined(OS_MACOSX)
 834     { switches::kRelauncherProcess,
 835       mac_relauncher::internal::RelauncherMain },
 836 #endif
 837
 838     // This entry is not needed on Linux, where the NaCl loader
 839     // process is launched via nacl_helper instead.
 840 #if !defined(DISABLE_NACL) && !defined(CHROME_MULTIPLE_DLL_BROWSER) && \
 841     !defined(OS_LINUX)
 842     { switches::kNaClLoaderProcess,  NaClMain },
 843 #else
 844     { "<invalid>", NULL },  // To avoid constant array of size 0
 845                             // when DISABLE_NACL and CHROME_MULTIPLE_DLL_CHILD
 846 #endif  // DISABLE_NACL
 847   };
 848
 849   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 850     if (process_type == kMainFunctions[i].name)
 851       return kMainFunctions[i].function(main_function_params);
 852   }
 853 #endif
 854
 855   return -1;
 856 }
 857
 858 void ChromeMainDelegate::ProcessExiting(const std::string& process_type) {
 859   if (SubprocessNeedsResourceBundle(process_type))
 860     ResourceBundle::CleanupSharedInstance();
 861 #if !defined(OS_ANDROID)
 862   logging::CleanupChromeLogging();
 863 #else
 864   // Android doesn't use InitChromeLogging, so we close the log file manually.
 865   logging::CloseLogFile();
 866 #endif  // !defined(OS_ANDROID)
 867
 868 #if defined(OS_WIN)
 869   RemoveHandleHooks();
 870 #endif
 871 }
 872
 873 #if defined(OS_MACOSX)
 874 bool ChromeMainDelegate::ProcessRegistersWithSystemProcess(
 875     const std::string& process_type) {
 876 #if defined(DISABLE_NACL)
 877   return false;
 878 #else
 879   return process_type == switches::kNaClLoaderProcess;
 880 #endif
 881 }
 882
 883 bool ChromeMainDelegate::ShouldSendMachPort(const std::string& process_type) {
 884   return process_type != switches::kRelauncherProcess &&
 885       process_type != switches::kServiceProcess;
 886 }
 887
 888 bool ChromeMainDelegate::DelaySandboxInitialization(
 889     const std::string& process_type) {
 890 #if !defined(DISABLE_NACL)
 891   // NaClLoader does this in NaClMainPlatformDelegate::EnableSandbox().
 892   // No sandbox needed for relauncher.
 893   if (process_type == switches::kNaClLoaderProcess)
 894     return true;
 895 #endif
 896   return process_type == switches::kRelauncherProcess;
 897 }
 898 #elif defined(OS_POSIX) && !defined(OS_ANDROID)
 899 void ChromeMainDelegate::ZygoteStarting(
 900     ScopedVector<content::ZygoteForkDelegate>* delegates) {
 901 #if !defined(DISABLE_NACL)
 902   nacl::AddNaClZygoteForkDelegates(delegates);
 903 #endif
 904 }
 905
 906 void ChromeMainDelegate::ZygoteForked() {
 907   Profiling::ProcessStarted();
 908   if (Profiling::BeingProfiled()) {
 909     base::debug::RestartProfilingAfterFork();
 910     SetUpProfilingShutdownHandler();
 911   }
 912
 913   // Needs to be called after we have chrome::DIR_USER_DATA.  BrowserMain sets
 914   // this up for the browser process in a different manner.
 915   const base::CommandLine* command_line =
 916       base::CommandLine::ForCurrentProcess();
 917   std::string process_type =
 918       command_line->GetSwitchValueASCII(switches::kProcessType);
 919   breakpad::InitCrashReporter(process_type);
 920
 921   // Reset the command line for the newly spawned process.
 922   crash_keys::SetSwitchesFromCommandLine(command_line);
 923 }
 924
 925 #endif  // OS_MACOSX
 926
 927 content::ContentBrowserClient*
 928 ChromeMainDelegate::CreateContentBrowserClient() {
 929 #if defined(CHROME_MULTIPLE_DLL_CHILD)
 930   return NULL;
 931 #else
 932   return g_chrome_content_browser_client.Pointer();
 933 #endif
 934 }
 935
 936 content::ContentPluginClient* ChromeMainDelegate::CreateContentPluginClient() {
 937 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 938   return NULL;
 939 #else
 940   return g_chrome_content_plugin_client.Pointer();
 941 #endif
 942 }
 943
 944 content::ContentRendererClient*
 945 ChromeMainDelegate::CreateContentRendererClient() {
 946 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 947   return NULL;
 948 #else
 949   return g_chrome_content_renderer_client.Pointer();
 950 #endif
 951 }
 952
 953 content::ContentUtilityClient*
 954 ChromeMainDelegate::CreateContentUtilityClient() {
 955 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
 956   return NULL;
 957 #else
 958   return g_chrome_content_utility_client.Pointer();
 959 #endif
 960 }
 961
 962 bool ChromeMainDelegate::ShouldEnableProfilerRecording() {
 963   switch (chrome::GetChannel()) {
 964     case version_info::Channel::UNKNOWN:
 965     case version_info::Channel::CANARY:
 966       return true;
 967     case version_info::Channel::DEV:
 968     case version_info::Channel::BETA:
 969     case version_info::Channel::STABLE:
 970     default:
 971       // Don't enable instrumentation.
 972       return false;
 973   }
 974 }