toolkit/xre/nsAppRunner.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "mozilla/dom/ContentParent.h"
   7 #include "mozilla/dom/ContentChild.h"
   8 #include "mozilla/ipc/GeckoChildProcessHost.h"
   9
  10 #include "mozilla/AppShutdown.h"
  11 #include "mozilla/ArrayUtils.h"
  12 #include "mozilla/Assertions.h"
  13 #include "mozilla/Attributes.h"
  14 #include "mozilla/Components.h"
  15 #include "mozilla/FilePreferences.h"
  16 #include "mozilla/ChaosMode.h"
  17 #include "mozilla/CmdLineAndEnvUtils.h"
  18 #include "mozilla/IOInterposer.h"
  19 #include "mozilla/ipc/UtilityProcessChild.h"
  20 #include "mozilla/Likely.h"
  21 #include "mozilla/MemoryChecking.h"
  22 #include "mozilla/Poison.h"
  23 #include "mozilla/Preferences.h"
  24 #include "mozilla/PreferenceSheet.h"
  25 #include "mozilla/Printf.h"
  26 #include "mozilla/ProcessType.h"
  27 #include "mozilla/ResultExtensions.h"
  28 #include "mozilla/RuntimeExceptionModule.h"
  29 #include "mozilla/ScopeExit.h"
  30 #include "mozilla/StaticPrefs_browser.h"
  31 #include "mozilla/StaticPrefs_fission.h"
  32 #include "mozilla/StaticPrefs_webgl.h"
  33 #include "mozilla/StaticPrefs_widget.h"
  34 #include "mozilla/Telemetry.h"
  35 #include "mozilla/Utf8.h"
  36 #include "mozilla/intl/LocaleService.h"
  37 #include "mozilla/JSONWriter.h"
  38 #include "mozilla/gfx/gfxVars.h"
  39 #include "mozilla/glean/GleanMetrics.h"
  40 #include "mozilla/glean/GleanPings.h"
  41 #include "mozilla/widget/TextRecognition.h"
  42 #include "BaseProfiler.h"
  43
  44 #include "nsAppRunner.h"
  45 #include "mozilla/XREAppData.h"
  46 #include "mozilla/Bootstrap.h"
  47 #if defined(MOZ_UPDATER) && !defined(MOZ_WIDGET_ANDROID)
  48 #  include "nsUpdateDriver.h"
  49 #  include "nsUpdateSyncManager.h"
  50 #endif
  51 #include "ProfileReset.h"
  52
  53 #ifdef MOZ_INSTRUMENT_EVENT_LOOP
  54 #  include "EventTracer.h"
  55 #endif
  56
  57 #ifdef XP_MACOSX
  58 #  include "nsVersionComparator.h"
  59 #  include "MacLaunchHelper.h"
  60 #  include "MacApplicationDelegate.h"
  61 #  include "MacAutoreleasePool.h"
  62 #  include "MacRunFromDmgUtils.h"
  63 // these are needed for sysctl
  64 #  include <sys/types.h>
  65 #  include <sys/sysctl.h>
  66 #endif
  67
  68 #include "prnetdb.h"
  69 #include "prprf.h"
  70 #include "prproces.h"
  71 #include "prenv.h"
  72 #include "prtime.h"
  73
  74 #include "nsIAppStartup.h"
  75 #include "nsCategoryManagerUtils.h"
  76 #include "nsIMutableArray.h"
  77 #include "nsCommandLine.h"
  78 #include "nsIComponentRegistrar.h"
  79 #include "nsIDialogParamBlock.h"
  80 #include "mozilla/ModuleUtils.h"
  81 #include "nsIIOService.h"
  82 #include "nsIObserverService.h"
  83 #include "nsINativeAppSupport.h"
  84 #include "nsIPlatformInfo.h"
  85 #include "nsIProcess.h"
  86 #include "nsIProfileUnlocker.h"
  87 #include "nsIPromptService.h"
  88 #include "nsIPropertyBag2.h"
  89 #include "nsIServiceManager.h"
  90 #include "nsIStringBundle.h"
  91 #include "nsISupportsPrimitives.h"
  92 #include "nsIToolkitProfile.h"
  93 #include "nsToolkitProfileService.h"
  94 #include "nsIURI.h"
  95 #include "nsIURL.h"
  96 #include "nsIWindowCreator.h"
  97 #include "nsIWindowWatcher.h"
  98 #include "nsIXULAppInfo.h"
  99 #include "nsIXULRuntime.h"
 100 #include "nsPIDOMWindow.h"
 101 #include "nsIWidget.h"
 102 #include "nsAppShellCID.h"
 103 #include "mozilla/dom/quota/QuotaManager.h"
 104 #include "mozilla/scache/StartupCache.h"
 105 #include "gfxPlatform.h"
 106 #include "PDMFactory.h"
 107 #ifdef XP_MACOSX
 108 #  include "gfxPlatformMac.h"
 109 #endif
 110
 111 #include "mozilla/Unused.h"
 112
 113 #ifdef XP_WIN
 114 #  include "nsIWinAppHelper.h"
 115 #  include <windows.h>
 116 #  include <intrin.h>
 117 #  include <math.h>
 118 #  include "cairo/cairo-features.h"
 119 #  include "detect_win32k_conflicts.h"
 120 #  include "mozilla/PreXULSkeletonUI.h"
 121 #  include "mozilla/DllPrefetchExperimentRegistryInfo.h"
 122 #  include "mozilla/WindowsBCryptInitialization.h"
 123 #  include "mozilla/WindowsDllBlocklist.h"
 124 #  include "mozilla/WindowsMsctfInitialization.h"
 125 #  include "mozilla/WindowsProcessMitigations.h"
 126 #  include "mozilla/WindowsVersion.h"
 127 #  include "mozilla/WinHeaderOnlyUtils.h"
 128 #  include "mozilla/mscom/ProcessRuntime.h"
 129 #  include "mozilla/mscom/ProfilerMarkers.h"
 130 #  include "WinTokenUtils.h"
 131
 132 #  if defined(MOZ_LAUNCHER_PROCESS)
 133 #    include "mozilla/LauncherRegistryInfo.h"
 134 #  endif
 135
 136 #  if defined(MOZ_DEFAULT_BROWSER_AGENT)
 137 #    include "nsIWindowsRegKey.h"
 138 #  endif
 139
 140 #  ifndef PROCESS_DEP_ENABLE
 141 #    define PROCESS_DEP_ENABLE 0x1
 142 #  endif
 143 #endif
 144
 145 #if defined(MOZ_SANDBOX)
 146 #  include "mozilla/SandboxSettings.h"
 147 #endif
 148
 149 #ifdef ACCESSIBILITY
 150 #  include "nsAccessibilityService.h"
 151 #  if defined(XP_WIN)
 152 #    include "mozilla/a11y/Compatibility.h"
 153 #    include "mozilla/a11y/Platform.h"
 154 #  endif
 155 #endif
 156
 157 #include "nsCRT.h"
 158 #include "nsCOMPtr.h"
 159 #include "nsDirectoryServiceDefs.h"
 160 #include "nsDirectoryServiceUtils.h"
 161 #include "nsEmbedCID.h"
 162 #include "nsIDUtils.h"
 163 #include "nsNetUtil.h"
 164 #include "nsReadableUtils.h"
 165 #include "nsXPCOM.h"
 166 #include "nsXPCOMCIDInternal.h"
 167 #include "nsString.h"
 168 #include "nsPrintfCString.h"
 169 #include "nsVersionComparator.h"
 170
 171 #include "nsAppDirectoryServiceDefs.h"
 172 #include "nsXULAppAPI.h"
 173 #include "nsXREDirProvider.h"
 174
 175 #include "nsINIParser.h"
 176 #include "mozilla/Omnijar.h"
 177 #include "mozilla/StartupTimeline.h"
 178 #include "mozilla/LateWriteChecks.h"
 179
 180 #include <stdlib.h>
 181 #include <locale.h>
 182
 183 #ifdef XP_UNIX
 184 #  include <errno.h>
 185 #  include <pwd.h>
 186 #  include <string.h>
 187 #  include <sys/resource.h>
 188 #  include <sys/stat.h>
 189 #  include <unistd.h>
 190 #endif
 191
 192 #ifdef XP_WIN
 193 #  include <process.h>
 194 #  include <shlobj.h>
 195 #  include "mozilla/WinDllServices.h"
 196 #  include "nsThreadUtils.h"
 197 #  include "WinUtils.h"
 198 #endif
 199
 200 #ifdef XP_MACOSX
 201 #  include "nsILocalFileMac.h"
 202 #  include "nsCommandLineServiceMac.h"
 203 #endif
 204
 205 // for X remote support
 206 #if defined(MOZ_HAS_REMOTE)
 207 #  include "nsRemoteService.h"
 208 #endif
 209
 210 #if defined(DEBUG) && defined(XP_WIN)
 211 #  include <malloc.h>
 212 #endif
 213
 214 #if defined(XP_MACOSX)
 215 #  include <Carbon/Carbon.h>
 216 #endif
 217
 218 #ifdef DEBUG
 219 #  include "mozilla/Logging.h"
 220 #endif
 221
 222 #ifdef MOZ_JPROF
 223 #  include "jprof.h"
 224 #endif
 225
 226 #include "nsExceptionHandler.h"
 227 #include "nsICrashReporter.h"
 228 #include "nsIPrefService.h"
 229 #include "nsIMemoryInfoDumper.h"
 230 #if defined(XP_LINUX) && !defined(ANDROID)
 231 #  include "mozilla/widget/LSBUtils.h"
 232 #endif
 233
 234 #include "base/command_line.h"
 235 #include "GTestRunner.h"
 236
 237 #ifdef MOZ_WIDGET_ANDROID
 238 #  include "mozilla/java/GeckoAppShellWrappers.h"
 239 #endif
 240
 241 #if defined(MOZ_SANDBOX)
 242 #  if defined(XP_LINUX) && !defined(ANDROID)
 243 #    include "mozilla/SandboxInfo.h"
 244 #  elif defined(XP_WIN)
 245 #    include "sandboxBroker.h"
 246 #  endif
 247 #endif
 248
 249 #ifdef MOZ_CODE_COVERAGE
 250 #  include "mozilla/CodeCoverageHandler.h"
 251 #endif
 252
 253 #include "GMPProcessChild.h"
 254 #include "SafeMode.h"
 255
 256 #ifdef MOZ_BACKGROUNDTASKS
 257 #  include "mozilla/BackgroundTasks.h"
 258 #  include "nsIPowerManagerService.h"
 259 #  include "nsIStringBundle.h"
 260 #endif
 261
 262 #ifdef USE_GLX_TEST
 263 #  include "mozilla/GUniquePtr.h"
 264 #  include "mozilla/GfxInfo.h"
 265 #endif
 266
 267 #ifdef MOZ_WIDGET_GTK
 268 #  include "nsAppShell.h"
 269 #endif
 270
 271 extern uint32_t gRestartMode;
 272 extern void InstallSignalHandlers(const char* ProgramName);
 273
 274 #define FILE_COMPATIBILITY_INFO "compatibility.ini"_ns
 275 #define FILE_INVALIDATE_CACHES ".purgecaches"_ns
 276 #define FILE_STARTUP_INCOMPLETE u".startup-incomplete"_ns
 277
 278 #if defined(MOZ_BLOCK_PROFILE_DOWNGRADE) || defined(MOZ_LAUNCHER_PROCESS) || \
 279     defined(MOZ_DEFAULT_BROWSER_AGENT)
 280 static const char kPrefHealthReportUploadEnabled[] =
 281     "datareporting.healthreport.uploadEnabled";
 282 #endif  // defined(MOZ_BLOCK_PROFILE_DOWNGRADE) || defined(MOZ_LAUNCHER_PROCESS)
 283         // || defined(MOZ_DEFAULT_BROWSER_AGENT)
 284 #if defined(MOZ_DEFAULT_BROWSER_AGENT)
 285 static const char kPrefDefaultAgentEnabled[] = "default-browser-agent.enabled";
 286
 287 static const char kPrefServicesSettingsServer[] = "services.settings.server";
 288 static const char kPrefSetDefaultBrowserUserChoicePref[] =
 289     "browser.shell.setDefaultBrowserUserChoice";
 290 #endif  // defined(MOZ_DEFAULT_BROWSER_AGENT)
 291
 292 #if defined(XP_WIN)
 293 static const char kPrefThemeId[] = "extensions.activeThemeID";
 294 static const char kPrefBrowserStartupBlankWindow[] =
 295     "browser.startup.blankWindow";
 296 static const char kPrefPreXulSkeletonUI[] = "browser.startup.preXulSkeletonUI";
 297 #endif  // defined(XP_WIN)
 298
 299 #if defined(MOZ_WIDGET_GTK)
 300 constexpr nsLiteralCString kStartupTokenNames[] = {
 301     "XDG_ACTIVATION_TOKEN"_ns,
 302     "DESKTOP_STARTUP_ID"_ns,
 303 };
 304 #endif
 305
 306 int gArgc;
 307 char** gArgv;
 308
 309 static const char gToolkitVersion[] = MOZ_STRINGIFY(GRE_MILESTONE);
 310 // The gToolkitBuildID global is defined to MOZ_BUILDID via gen_buildid.py
 311 // in toolkit/library. See related comment in toolkit/library/moz.build.
 312 extern const char gToolkitBuildID[];
 313
 314 static nsIProfileLock* gProfileLock;
 315 #if defined(MOZ_HAS_REMOTE)
 316 static nsRemoteService* gRemoteService;
 317 bool gRestartWithoutRemote = false;
 318 #endif
 319
 320 int gRestartArgc;
 321 char** gRestartArgv;
 322
 323 // If gRestartedByOS is set, we were automatically restarted by the OS.
 324 bool gRestartedByOS = false;
 325
 326 bool gIsGtest = false;
 327
 328 bool gKioskMode = false;
 329 int gKioskMonitor = -1;
 330
 331 bool gAllowContentAnalysisArgPresent = false;
 332
 333 nsString gAbsoluteArgv0Path;
 334
 335 #if defined(XP_WIN)
 336 nsString gProcessStartupShortcut;
 337 #endif
 338
 339 #if defined(MOZ_WIDGET_GTK)
 340 #  include <glib.h>
 341 #  include "mozilla/WidgetUtilsGtk.h"
 342 #  include <gtk/gtk.h>
 343 #  ifdef MOZ_WAYLAND
 344 #    include <gdk/gdkwayland.h>
 345 #    include "mozilla/widget/nsWaylandDisplay.h"
 346 #    include "wayland-proxy.h"
 347 #  endif
 348 #  ifdef MOZ_X11
 349 #    include <gdk/gdkx.h>
 350 #  endif /* MOZ_X11 */
 351 #endif
 352
 353 #if defined(MOZ_WAYLAND)
 354 std::unique_ptr<WaylandProxy> gWaylandProxy;
 355 #endif
 356
 357 #include "BinaryPath.h"
 358
 359 #ifdef MOZ_LOGGING
 360 #  include "mozilla/Logging.h"
 361 extern mozilla::LazyLogModule gWidgetWaylandLog;
 362 #endif /* MOZ_LOGGING */
 363
 364 #ifdef FUZZING
 365 #  include "FuzzerRunner.h"
 366
 367 namespace mozilla {
 368 FuzzerRunner* fuzzerRunner = 0;
 369 }  // namespace mozilla
 370
 371 #  ifdef LIBFUZZER
 372 void XRE_LibFuzzerSetDriver(LibFuzzerDriver aDriver) {
 373   mozilla::fuzzerRunner->setParams(aDriver);
 374 }
 375 #  endif
 376 #endif  // FUZZING
 377
 378 // Undo X11/X.h's definition of None
 379 #undef None
 380
 381 namespace mozilla {
 382 int (*RunGTest)(int*, char**) = 0;
 383
 384 bool RunningGTest() { return RunGTest; }
 385 }  // namespace mozilla
 386
 387 using namespace mozilla;
 388 using namespace mozilla::widget;
 389 using namespace mozilla::startup;
 390 using mozilla::Unused;
 391 using mozilla::dom::ContentChild;
 392 using mozilla::dom::ContentParent;
 393 using mozilla::dom::quota::QuotaManager;
 394 using mozilla::intl::LocaleService;
 395 using mozilla::scache::StartupCache;
 396
 397 // Save the given word to the specified environment variable.
 398 static void MOZ_NEVER_INLINE SaveWordToEnv(const char* name,
 399                                            const nsACString& word) {
 400   char* expr =
 401       Smprintf("%s=%s", name, PromiseFlatCString(word).get()).release();
 402   if (expr) PR_SetEnv(expr);
 403   // We intentionally leak |expr| here since it is required by PR_SetEnv.
 404 }
 405
 406 // Save the path of the given file to the specified environment variable.
 407 static void SaveFileToEnv(const char* name, nsIFile* file) {
 408 #ifdef XP_WIN
 409   nsAutoString path;
 410   file->GetPath(path);
 411   SetEnvironmentVariableW(NS_ConvertASCIItoUTF16(name).get(), path.get());
 412 #else
 413   nsAutoCString path;
 414   file->GetNativePath(path);
 415   SaveWordToEnv(name, path);
 416 #endif
 417 }
 418
 419 static bool gIsExpectedExit = false;
 420
 421 void MozExpectedExit() { gIsExpectedExit = true; }
 422
 423 /**
 424  * Runs atexit() to catch unexpected exit from 3rd party libraries like the
 425  * Intel graphics driver calling exit in an error condition. When they
 426  * call exit() to report an error we won't shutdown correctly and wont catch
 427  * the issue with our crash reporter.
 428  */
 429 static void UnexpectedExit() {
 430   if (!gIsExpectedExit) {
 431     gIsExpectedExit = true;  // Don't risk re-entrency issues when crashing.
 432     MOZ_CRASH("Exit called by third party code.");
 433   }
 434 }
 435
 436 #if defined(MOZ_WAYLAND)
 437 bool IsWaylandEnabled() {
 438   static bool isWaylandEnabled = []() {
 439     const char* waylandDisplay = PR_GetEnv("WAYLAND_DISPLAY");
 440     if (!waylandDisplay) {
 441       return false;
 442     }
 443     if (!PR_GetEnv("DISPLAY")) {
 444       // No X11 display, so try to run wayland.
 445       return true;
 446     }
 447     // MOZ_ENABLE_WAYLAND is our primary Wayland on/off switch.
 448     if (const char* waylandPref = PR_GetEnv("MOZ_ENABLE_WAYLAND")) {
 449       return *waylandPref == '1';
 450     }
 451     if (const char* backendPref = PR_GetEnv("GDK_BACKEND")) {
 452       if (!strncmp(backendPref, "wayland", 7)) {
 453         NS_WARNING(
 454             "Wayland backend should be enabled by MOZ_ENABLE_WAYLAND=1."
 455             "GDK_BACKEND is a Gtk3 debug variable and may cause issues.");
 456         return true;
 457       }
 458     }
 459     // Enable by default when we're running on a recent enough GTK version. We'd
 460     // like to check further details like compositor version and so on ideally
 461     // to make sure we don't enable it on old Mutter or what not, but we can't,
 462     // so let's assume that if the user is running on a Wayland session by
 463     // default we're ok, since either the distro has enabled Wayland by default,
 464     // or the user has gone out of their way to use Wayland.
 465     return !gtk_check_version(3, 24, 30);
 466   }();
 467   return isWaylandEnabled;
 468 }
 469 #else
 470 bool IsWaylandEnabled() { return false; }
 471 #endif
 472
 473 /**
 474  * Output a string to the user.  This method is really only meant to be used to
 475  * output last-ditch error messages designed for developers NOT END USERS.
 476  *
 477  * @param isError
 478  *        Pass true to indicate severe errors.
 479  * @param fmt
 480  *        printf-style format string followed by arguments.
 481  */
 482 static MOZ_FORMAT_PRINTF(2, 3) void Output(bool isError, const char* fmt, ...) {
 483   va_list ap;
 484   va_start(ap, fmt);
 485
 486 #if defined(XP_WIN) && !MOZ_WINCONSOLE
 487   SmprintfPointer msg = mozilla::Vsmprintf(fmt, ap);
 488   if (msg) {
 489     UINT flags = MB_OK;
 490     if (isError)
 491       flags |= MB_ICONERROR;
 492     else
 493       flags |= MB_ICONINFORMATION;
 494
 495     wchar_t wide_msg[1024];
 496     MultiByteToWideChar(CP_ACP, 0, msg.get(), -1, wide_msg,
 497                         sizeof(wide_msg) / sizeof(wchar_t));
 498
 499     MessageBoxW(nullptr, wide_msg, L"XULRunner", flags);
 500   }
 501 #elif defined(MOZ_WIDGET_ANDROID)
 502   SmprintfPointer msg = mozilla::Vsmprintf(fmt, ap);
 503   if (msg) {
 504     __android_log_print(isError ? ANDROID_LOG_ERROR : ANDROID_LOG_INFO,
 505                         "GeckoRuntime", "%s", msg.get());
 506   }
 507 #else
 508   vfprintf(stderr, fmt, ap);
 509 #endif
 510
 511   va_end(ap);
 512 }
 513
 514 /**
 515  * Check for a commandline flag. If the flag takes a parameter, the
 516  * parameter is returned in aParam. Flags may be in the form -arg or
 517  * --arg (or /arg on win32).
 518  *
 519  * @param aArg the parameter to check. Must be lowercase.
 520  * @param aParam if non-null, the -arg <data> will be stored in this pointer.
 521  *        This is *not* allocated, but rather a pointer to the argv data.
 522  * @param aFlags flags @see CheckArgFlag
 523  */
 524 static ArgResult CheckArg(const char* aArg, const char** aParam = nullptr,
 525                           CheckArgFlag aFlags = CheckArgFlag::RemoveArg) {
 526   MOZ_ASSERT(gArgv, "gArgv must be initialized before CheckArg()");
 527   return CheckArg(gArgc, gArgv, aArg, aParam, aFlags);
 528 }
 529
 530 /**
 531  * Check for a commandline flag. Ignore data that's passed in with the flag.
 532  * Flags may be in the form -arg or --arg (or /arg on win32).
 533  * Will not remove flag if found.
 534  *
 535  * @param aArg the parameter to check. Must be lowercase.
 536  */
 537 static ArgResult CheckArgExists(const char* aArg) {
 538   return CheckArg(aArg, nullptr, CheckArgFlag::None);
 539 }
 540
 541 bool gSafeMode = false;
 542 bool gFxREmbedded = false;
 543
 544 enum E10sStatus {
 545   kE10sEnabledByDefault,
 546   kE10sForceDisabled,
 547 };
 548
 549 static bool gBrowserTabsRemoteAutostart = false;
 550 static E10sStatus gBrowserTabsRemoteStatus;
 551 static bool gBrowserTabsRemoteAutostartInitialized = false;
 552
 553 namespace mozilla {
 554
 555 bool BrowserTabsRemoteAutostart() {
 556   if (gBrowserTabsRemoteAutostartInitialized) {
 557     return gBrowserTabsRemoteAutostart;
 558   }
 559   gBrowserTabsRemoteAutostartInitialized = true;
 560
 561   // If we're not in the parent process, we are running E10s.
 562   if (!XRE_IsParentProcess()) {
 563     gBrowserTabsRemoteAutostart = true;
 564     return gBrowserTabsRemoteAutostart;
 565   }
 566
 567   gBrowserTabsRemoteAutostart = true;
 568   E10sStatus status = kE10sEnabledByDefault;
 569
 570   // We use "are non-local connections disabled" as a proxy for
 571   // "are we running some kind of automated test". It would be nicer to use
 572   // xpc::IsInAutomation(), but that depends on some prefs being set, which
 573   // they are not in (at least) gtests (where we can't) and xpcshell.
 574   // Long-term, hopefully we can make all tests e10s-friendly,
 575   // then we could remove this automation-only env variable.
 576   if (gBrowserTabsRemoteAutostart && xpc::AreNonLocalConnectionsDisabled()) {
 577     const char* forceDisable = PR_GetEnv("MOZ_FORCE_DISABLE_E10S");
 578     if (forceDisable && !strcmp(forceDisable, "1")) {
 579       gBrowserTabsRemoteAutostart = false;
 580       status = kE10sForceDisabled;
 581     }
 582   }
 583
 584   gBrowserTabsRemoteStatus = status;
 585
 586   return gBrowserTabsRemoteAutostart;
 587 }
 588
 589 }  // namespace mozilla
 590
 591 // Win32k Infrastructure ==============================================
 592
 593 // This bool tells us if we have initialized the following two statics
 594 // upon startup.
 595
 596 static bool gWin32kInitialized = false;
 597
 598 // Win32k Lockdown for the current session is determined once, at startup,
 599 // and then remains the same for the duration of the session.
 600
 601 static nsIXULRuntime::ContentWin32kLockdownState gWin32kStatus;
 602
 603 // The status of the win32k experiment. It is determined once, at startup,
 604 // and then remains the same for the duration of the session.
 605
 606 static nsIXULRuntime::ExperimentStatus gWin32kExperimentStatus =
 607     nsIXULRuntime::eExperimentStatusUnenrolled;
 608
 609 #ifdef XP_WIN
 610 // The states for win32k lockdown can be generalized to:
 611 //  - User doesn't meet requirements (bad OS, webrender, remotegl) aka
 612 //  PersistentRequirement
 613 //  - User has Safe Mode enabled, Win32k Disabled by Env Var, or E10S disabled
 614 //  by Env Var aka TemporaryRequirement
 615 //  - User has set the win32k pref to something non-default aka NonDefaultPref
 616 //  - User has been enrolled in the experiment and does what it says aka
 617 //  Enrolled
 618 //  - User does the default aka Default
 619 //
 620 // We expect the below behvaior.  In the code, there may be references to these
 621 //     behaviors (e.g. [A]) but not always.
 622 //
 623 // [A] Becoming enrolled in the experiment while NonDefaultPref disqualifies
 624 //     you upon next browser start
 625 // [B] Becoming enrolled in the experiment while PersistentRequirement
 626 //     disqualifies you upon next browser start
 627 // [C] Becoming enrolled in the experiment while TemporaryRequirement does not
 628 //     disqualify you
 629 // [D] Becoming enrolled in the experiment will only take effect after restart
 630 // [E] While enrolled, becoming PersistentRequirement will not disqualify you
 631 //     until browser restart, but if the state is present at browser start,
 632 //     will disqualify you. Additionally, it will not affect the session value
 633 //     of gWin32kStatus.
 634 //     XXX(bobowen): I hope both webrender and wbgl.out-of-process require a
 635 //                   restart to take effect!
 636 // [F] While enrolled, becoming NonDefaultPref will disqualify you upon next
 637 //     browser start
 638 // [G] While enrolled, becoming TemporaryRequirement will _not_ disqualify you,
 639 //     but the session status will prevent win32k lockdown from taking effect.
 640
 641 // The win32k pref
 642 static const char kPrefWin32k[] = "security.sandbox.content.win32k-disable";
 643
 644 // The current enrollment status as controlled by Normandy. This value is only
 645 // stored in the default preference branch, and is not persisted across
 646 // sessions by the preference service. It therefore isn't available early
 647 // enough at startup, and needs to be synced to a preference in the user
 648 // branch which is persisted across sessions.
 649 static const char kPrefWin32kExperimentEnrollmentStatus[] =
 650     "security.sandbox.content.win32k-experiment.enrollmentStatus";
 651
 652 // The enrollment status to be used at browser startup. This automatically
 653 // synced from the above enrollmentStatus preference whenever the latter is
 654 // changed. We reused the Fission experiment enum - it can have any of the
 655 // values defined in the `nsIXULRuntime_ExperimentStatus` enum _except_ rollout.
 656 // Meanings are documented in the declaration of
 657 // `nsIXULRuntime.fissionExperimentStatus`
 658 static const char kPrefWin32kExperimentStartupEnrollmentStatus[] =
 659     "security.sandbox.content.win32k-experiment.startupEnrollmentStatus";
 660
 661 namespace mozilla {
 662
 663 bool Win32kExperimentEnrolled() {
 664   MOZ_ASSERT(XRE_IsParentProcess());
 665   return gWin32kExperimentStatus == nsIXULRuntime::eExperimentStatusControl ||
 666          gWin32kExperimentStatus == nsIXULRuntime::eExperimentStatusTreatment;
 667 }
 668
 669 }  // namespace mozilla
 670
 671 static bool Win32kRequirementsUnsatisfied(
 672     nsIXULRuntime::ContentWin32kLockdownState aStatus) {
 673   return aStatus == nsIXULRuntime::ContentWin32kLockdownState::
 674                         OperatingSystemNotSupported ||
 675          aStatus ==
 676              nsIXULRuntime::ContentWin32kLockdownState::MissingWebRender ||
 677          aStatus ==
 678              nsIXULRuntime::ContentWin32kLockdownState::MissingRemoteWebGL ||
 679          aStatus ==
 680              nsIXULRuntime::ContentWin32kLockdownState::DecodersArentRemote;
 681 }
 682
 683 static void Win32kExperimentDisqualify() {
 684   MOZ_ASSERT(XRE_IsParentProcess());
 685   Preferences::SetUint(kPrefWin32kExperimentEnrollmentStatus,
 686                        nsIXULRuntime::eExperimentStatusDisqualified);
 687 }
 688
 689 static void OnWin32kEnrollmentStatusChanged(const char* aPref, void* aData) {
 690   auto newStatusInt =
 691       Preferences::GetUint(kPrefWin32kExperimentEnrollmentStatus,
 692                            nsIXULRuntime::eExperimentStatusUnenrolled);
 693   auto newStatus = newStatusInt < nsIXULRuntime::eExperimentStatusCount
 694                        ? nsIXULRuntime::ExperimentStatus(newStatusInt)
 695                        : nsIXULRuntime::eExperimentStatusDisqualified;
 696
 697   // Set the startup pref for next browser start [D]
 698   Preferences::SetUint(kPrefWin32kExperimentStartupEnrollmentStatus, newStatus);
 699 }
 700
 701 namespace {
 702 // This observer is notified during `profile-before-change`, and ensures that
 703 // the experiment enrollment status is synced over before the browser shuts
 704 // down, even if it was not modified since win32k was initialized.
 705 class Win32kEnrollmentStatusShutdownObserver final : public nsIObserver {
 706  public:
 707   NS_DECL_ISUPPORTS
 708
 709   NS_IMETHOD Observe(nsISupports* aSubject, const char* aTopic,
 710                      const char16_t* aData) override {
 711     MOZ_ASSERT(!strcmp("profile-before-change", aTopic));
 712     OnWin32kEnrollmentStatusChanged(kPrefWin32kExperimentEnrollmentStatus,
 713                                     nullptr);
 714     return NS_OK;
 715   }
 716
 717  private:
 718   ~Win32kEnrollmentStatusShutdownObserver() = default;
 719 };
 720 NS_IMPL_ISUPPORTS(Win32kEnrollmentStatusShutdownObserver, nsIObserver)
 721 }  // namespace
 722
 723 static void OnWin32kChanged(const char* aPref, void* aData) {
 724   // If we're actively enrolled in the Win32k experiment, disqualify the user
 725   // from the experiment if the Win32k pref is modified. [F]
 726   if (Win32kExperimentEnrolled() && Preferences::HasUserValue(kPrefWin32k)) {
 727     Win32kExperimentDisqualify();
 728   }
 729 }
 730
 731 #endif  // XP_WIN
 732
 733 namespace mozilla {
 734 void EnsureWin32kInitialized();
 735 }
 736
 737 nsIXULRuntime::ContentWin32kLockdownState GetLiveWin32kLockdownState() {
 738 #ifdef XP_WIN
 739
 740   // HasUserValue The Pref functions can only be called on main thread
 741   MOZ_ASSERT(NS_IsMainThread());
 742
 743 #  ifdef MOZ_BACKGROUNDTASKS
 744   if (BackgroundTasks::IsBackgroundTaskMode()) {
 745     // Let's bail out before loading all the graphics libs.
 746     return nsIXULRuntime::ContentWin32kLockdownState::DisabledByDefault;
 747   }
 748 #  endif
 749
 750   mozilla::EnsureWin32kInitialized();
 751   gfxPlatform::GetPlatform();
 752
 753   if (gSafeMode) {
 754     return nsIXULRuntime::ContentWin32kLockdownState::DisabledBySafeMode;
 755   }
 756
 757   if (EnvHasValue("MOZ_ENABLE_WIN32K")) {
 758     return nsIXULRuntime::ContentWin32kLockdownState::DisabledByEnvVar;
 759   }
 760
 761   if (!mozilla::BrowserTabsRemoteAutostart()) {
 762     return nsIXULRuntime::ContentWin32kLockdownState::DisabledByE10S;
 763   }
 764
 765   // Win32k lockdown is available on Win8+, but we are initially limiting it to
 766   // Windows 10 v1709 (build 16299) or later. Before this COM initialization
 767   // currently fails if user32.dll has loaded before it is called.
 768   if (!IsWin10FallCreatorsUpdateOrLater()) {
 769     return nsIXULRuntime::ContentWin32kLockdownState::
 770         OperatingSystemNotSupported;
 771   }
 772
 773   {
 774     ConflictingMitigationStatus conflictingMitigationStatus = {};
 775     if (!detect_win32k_conflicting_mitigations(&conflictingMitigationStatus)) {
 776       return nsIXULRuntime::ContentWin32kLockdownState::
 777           IncompatibleMitigationPolicy;
 778     }
 779     if (conflictingMitigationStatus.caller_check ||
 780         conflictingMitigationStatus.sim_exec ||
 781         conflictingMitigationStatus.stack_pivot) {
 782       return nsIXULRuntime::ContentWin32kLockdownState::
 783           IncompatibleMitigationPolicy;
 784     }
 785   }
 786
 787   // Non-native theming is required as well
 788   if (!StaticPrefs::widget_non_native_theme_enabled()) {
 789     return nsIXULRuntime::ContentWin32kLockdownState::MissingNonNativeTheming;
 790   }
 791
 792   // Win32k Lockdown requires Remote WebGL, but it may be disabled on
 793   // certain hardware or virtual machines.
 794   if (!gfx::gfxVars::AllowWebglOop() || !StaticPrefs::webgl_out_of_process()) {
 795     return nsIXULRuntime::ContentWin32kLockdownState::MissingRemoteWebGL;
 796   }
 797
 798   // Some (not sure exactly which) decoders are not compatible
 799   if (!PDMFactory::AllDecodersAreRemote()) {
 800     return nsIXULRuntime::ContentWin32kLockdownState::DecodersArentRemote;
 801   }
 802
 803   bool prefSetByUser =
 804       Preferences::HasUserValue("security.sandbox.content.win32k-disable");
 805   bool prefValue = Preferences::GetBool(
 806       "security.sandbox.content.win32k-disable", false, PrefValueKind::User);
 807   bool defaultValue = Preferences::GetBool(
 808       "security.sandbox.content.win32k-disable", false, PrefValueKind::Default);
 809
 810   if (prefSetByUser) {
 811     if (prefValue) {
 812       return nsIXULRuntime::ContentWin32kLockdownState::EnabledByUserPref;
 813     } else {
 814       return nsIXULRuntime::ContentWin32kLockdownState::DisabledByUserPref;
 815     }
 816   }
 817
 818   if (gWin32kExperimentStatus ==
 819       nsIXULRuntime::ExperimentStatus::eExperimentStatusControl) {
 820     return nsIXULRuntime::ContentWin32kLockdownState::DisabledByControlGroup;
 821   } else if (gWin32kExperimentStatus ==
 822              nsIXULRuntime::ExperimentStatus::eExperimentStatusTreatment) {
 823     return nsIXULRuntime::ContentWin32kLockdownState::EnabledByTreatmentGroup;
 824   }
 825
 826   if (defaultValue) {
 827     return nsIXULRuntime::ContentWin32kLockdownState::EnabledByDefault;
 828   } else {
 829     return nsIXULRuntime::ContentWin32kLockdownState::DisabledByDefault;
 830   }
 831
 832 #else
 833
 834   return nsIXULRuntime::ContentWin32kLockdownState::OperatingSystemNotSupported;
 835
 836 #endif
 837 }
 838
 839 namespace mozilla {
 840
 841 void EnsureWin32kInitialized() {
 842   if (gWin32kInitialized) {
 843     return;
 844   }
 845   gWin32kInitialized = true;
 846
 847 #ifdef XP_WIN
 848
 849   // Initialize the Win32k experiment, configuring win32k's
 850   // default, before checking other overrides. This allows opting-out of a
 851   // Win32k experiment through about:preferences or about:config from a
 852   // safemode session.
 853   uint32_t experimentRaw =
 854       Preferences::GetUint(kPrefWin32kExperimentStartupEnrollmentStatus,
 855                            nsIXULRuntime::eExperimentStatusUnenrolled);
 856   gWin32kExperimentStatus =
 857       experimentRaw < nsIXULRuntime::eExperimentStatusCount
 858           ? nsIXULRuntime::ExperimentStatus(experimentRaw)
 859           : nsIXULRuntime::eExperimentStatusDisqualified;
 860
 861   // Watch the experiment enrollment status pref to detect experiment
 862   // disqualification, and ensure it is propagated for the next restart.
 863   Preferences::RegisterCallback(&OnWin32kEnrollmentStatusChanged,
 864                                 kPrefWin32kExperimentEnrollmentStatus);
 865   if (nsCOMPtr<nsIObserverService> observerService =
 866           mozilla::services::GetObserverService()) {
 867     nsCOMPtr<nsIObserver> shutdownObserver =
 868         new Win32kEnrollmentStatusShutdownObserver();
 869     observerService->AddObserver(shutdownObserver, "profile-before-change",
 870                                  false);
 871   }
 872
 873   // If the user no longer qualifies because they edited a required pref, check
 874   // that. [B] [E]
 875   auto tmpStatus = GetLiveWin32kLockdownState();
 876   if (Win32kExperimentEnrolled() && Win32kRequirementsUnsatisfied(tmpStatus)) {
 877     Win32kExperimentDisqualify();
 878     gWin32kExperimentStatus = nsIXULRuntime::eExperimentStatusDisqualified;
 879   }
 880
 881   // If the user has overridden an active experiment by setting a user value for
 882   // "security.sandbox.content.win32k-disable", disqualify the user from the
 883   // experiment. [A] [F]
 884   if (Preferences::HasUserValue(kPrefWin32k) && Win32kExperimentEnrolled()) {
 885     Win32kExperimentDisqualify();
 886     gWin32kExperimentStatus = nsIXULRuntime::eExperimentStatusDisqualified;
 887   }
 888
 889   // Unlike Fission, we do not configure the default branch based on experiment
 890   // enrollment status.  Instead we check the startupEnrollmentPref in
 891   // GetContentWin32kLockdownState()
 892
 893   Preferences::RegisterCallback(&OnWin32kChanged, kPrefWin32k);
 894
 895   // Set the state
 896   gWin32kStatus = GetLiveWin32kLockdownState();
 897
 898 #else
 899   gWin32kStatus =
 900       nsIXULRuntime::ContentWin32kLockdownState::OperatingSystemNotSupported;
 901   gWin32kExperimentStatus = nsIXULRuntime::eExperimentStatusUnenrolled;
 902
 903 #endif  // XP_WIN
 904 }
 905
 906 nsIXULRuntime::ContentWin32kLockdownState GetWin32kLockdownState() {
 907 #ifdef XP_WIN
 908
 909   mozilla::EnsureWin32kInitialized();
 910   return gWin32kStatus;
 911
 912 #else
 913
 914   return nsIXULRuntime::ContentWin32kLockdownState::OperatingSystemNotSupported;
 915
 916 #endif
 917 }
 918
 919 }  // namespace mozilla
 920
 921 // End Win32k Infrastructure ==========================================
 922
 923 // Fission Infrastructure =============================================
 924
 925 // Fission enablement for the current session is determined once, at startup,
 926 // and then remains the same for the duration of the session.
 927 //
 928 // The following factors determine whether or not Fission is enabled for a
 929 // session, in order of precedence:
 930 //
 931 // - Safe mode: In safe mode, Fission is never enabled.
 932 //
 933 // - The MOZ_FORCE_ENABLE_FISSION environment variable: If set to any value,
 934 //   Fission will be enabled.
 935 //
 936 // - The 'fission.autostart' preference, if it has been configured by the user.
 937 static const char kPrefFissionAutostart[] = "fission.autostart";
 938
 939 // The computed FissionAutostart value for the session, read by content
 940 // processes to initialize gFissionAutostart.
 941 //
 942 // This pref is locked, and only configured on the default branch, so should
 943 // never be persisted in a profile.
 944 static const char kPrefFissionAutostartSession[] = "fission.autostart.session";
 945
 946 //
 947 // The computed FissionAutostart value for the session, read by content
 948 // processes to initialize gFissionAutostart.
 949
 950 static bool gFissionAutostart = false;
 951 static bool gFissionAutostartInitialized = false;
 952 static nsIXULRuntime::FissionDecisionStatus gFissionDecisionStatus;
 953 static void EnsureFissionAutostartInitialized() {
 954   if (gFissionAutostartInitialized) {
 955     return;
 956   }
 957   gFissionAutostartInitialized = true;
 958
 959   if (!XRE_IsParentProcess()) {
 960     // This pref is configured for the current session by the parent process.
 961     gFissionAutostart = Preferences::GetBool(kPrefFissionAutostartSession,
 962                                              false, PrefValueKind::Default);
 963     return;
 964   }
 965
 966   if (!BrowserTabsRemoteAutostart()) {
 967     gFissionAutostart = false;
 968     if (gBrowserTabsRemoteStatus == kE10sForceDisabled) {
 969       gFissionDecisionStatus = nsIXULRuntime::eFissionDisabledByE10sEnv;
 970     } else {
 971       gFissionDecisionStatus = nsIXULRuntime::eFissionDisabledByE10sOther;
 972     }
 973   } else if (EnvHasValue("MOZ_FORCE_ENABLE_FISSION")) {
 974     gFissionAutostart = true;
 975     gFissionDecisionStatus = nsIXULRuntime::eFissionEnabledByEnv;
 976   } else if (EnvHasValue("MOZ_FORCE_DISABLE_FISSION")) {
 977     gFissionAutostart = false;
 978     gFissionDecisionStatus = nsIXULRuntime::eFissionDisabledByEnv;
 979   } else {
 980     // NOTE: This will take into account changes to the default due to
 981     // `InitializeFissionExperimentStatus`.
 982     gFissionAutostart = Preferences::GetBool(kPrefFissionAutostart, false);
 983     if (Preferences::HasUserValue(kPrefFissionAutostart)) {
 984       gFissionDecisionStatus = gFissionAutostart
 985                                    ? nsIXULRuntime::eFissionEnabledByUserPref
 986                                    : nsIXULRuntime::eFissionDisabledByUserPref;
 987     } else {
 988       gFissionDecisionStatus = gFissionAutostart
 989                                    ? nsIXULRuntime::eFissionEnabledByDefault
 990                                    : nsIXULRuntime::eFissionDisabledByDefault;
 991     }
 992   }
 993
 994   // Content processes cannot run the same logic as we're running in the parent
 995   // process, as the current value of various preferences may have changed
 996   // between launches. Instead, the content process will read the default branch
 997   // of the locked `fission.autostart.session` preference to determine the value
 998   // determined by this method.
 999   Preferences::Unlock(kPrefFissionAutostartSession);
1000   Preferences::ClearUser(kPrefFissionAutostartSession);
1001   Preferences::SetBool(kPrefFissionAutostartSession, gFissionAutostart,
1002                        PrefValueKind::Default);
1003   Preferences::Lock(kPrefFissionAutostartSession);
1004 }
1005
1006 namespace mozilla {
1007
1008 bool FissionAutostart() {
1009   EnsureFissionAutostartInitialized();
1010   return gFissionAutostart;
1011 }
1012
1013 }  // namespace mozilla
1014
1015 // End Fission Infrastructure =========================================
1016
1017 namespace mozilla {
1018
1019 bool SessionHistoryInParent() {
1020   return FissionAutostart() ||
1021          !StaticPrefs::
1022              fission_disableSessionHistoryInParent_AtStartup_DoNotUseDirectly();
1023 }
1024
1025 bool SessionStorePlatformCollection() {
1026   return SessionHistoryInParent() &&
1027          !StaticPrefs::
1028              browser_sessionstore_disable_platform_collection_AtStartup_DoNotUseDirectly();
1029 }
1030
1031 bool BFCacheInParent() {
1032   return SessionHistoryInParent() &&
1033          StaticPrefs::fission_bfcacheInParent_DoNotUseDirectly();
1034 }
1035
1036 }  // namespace mozilla
1037
1038 /**
1039  * The nsXULAppInfo object implements nsIFactory so that it can be its own
1040  * singleton.
1041  */
1042 class nsXULAppInfo : public nsIXULAppInfo,
1043 #ifdef XP_WIN
1044                      public nsIWinAppHelper,
1045 #endif
1046                      public nsICrashReporter,
1047                      public nsIFinishDumpingCallback,
1048                      public nsIXULRuntime
1049
1050 {
1051  public:
1052   constexpr nsXULAppInfo() = default;
1053   NS_DECL_ISUPPORTS_INHERITED
1054   NS_DECL_NSIPLATFORMINFO
1055   NS_DECL_NSIXULAPPINFO
1056   NS_DECL_NSIXULRUNTIME
1057   NS_DECL_NSICRASHREPORTER
1058   NS_DECL_NSIFINISHDUMPINGCALLBACK
1059 #ifdef XP_WIN
1060   NS_DECL_NSIWINAPPHELPER
1061 #endif
1062 };
1063
1064 NS_INTERFACE_MAP_BEGIN(nsXULAppInfo)
1065   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXULRuntime)
1066   NS_INTERFACE_MAP_ENTRY(nsIXULRuntime)
1067 #ifdef XP_WIN
1068   NS_INTERFACE_MAP_ENTRY(nsIWinAppHelper)
1069 #endif
1070   NS_INTERFACE_MAP_ENTRY(nsICrashReporter)
1071   NS_INTERFACE_MAP_ENTRY(nsIFinishDumpingCallback)
1072   NS_INTERFACE_MAP_ENTRY(nsIPlatformInfo)
1073   NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIXULAppInfo,
1074                                      gAppData || XRE_IsContentProcess())
1075 NS_INTERFACE_MAP_END
1076
1077 NS_IMETHODIMP_(MozExternalRefCountType)
1078 nsXULAppInfo::AddRef() { return 1; }
1079
1080 NS_IMETHODIMP_(MozExternalRefCountType)
1081 nsXULAppInfo::Release() { return 1; }
1082
1083 NS_IMETHODIMP
1084 nsXULAppInfo::GetVendor(nsACString& aResult) {
1085   if (XRE_IsContentProcess()) {
1086     ContentChild* cc = ContentChild::GetSingleton();
1087     aResult = cc->GetAppInfo().vendor;
1088     return NS_OK;
1089   }
1090   aResult.Assign(gAppData->vendor);
1091
1092   return NS_OK;
1093 }
1094
1095 NS_IMETHODIMP
1096 nsXULAppInfo::GetName(nsACString& aResult) {
1097   if (XRE_IsContentProcess()) {
1098     ContentChild* cc = ContentChild::GetSingleton();
1099     aResult = cc->GetAppInfo().name;
1100     return NS_OK;
1101   }
1102
1103 #ifdef MOZ_WIDGET_ANDROID
1104   nsCString name = java::GeckoAppShell::GetAppName()->ToCString();
1105   aResult.Assign(std::move(name));
1106 #else
1107   aResult.Assign(gAppData->name);
1108 #endif
1109
1110   return NS_OK;
1111 }
1112
1113 NS_IMETHODIMP
1114 nsXULAppInfo::GetID(nsACString& aResult) {
1115   if (XRE_IsContentProcess()) {
1116     ContentChild* cc = ContentChild::GetSingleton();
1117     aResult = cc->GetAppInfo().ID;
1118     return NS_OK;
1119   }
1120   aResult.Assign(gAppData->ID);
1121
1122   return NS_OK;
1123 }
1124
1125 NS_IMETHODIMP
1126 nsXULAppInfo::GetVersion(nsACString& aResult) {
1127   if (XRE_IsContentProcess()) {
1128     ContentChild* cc = ContentChild::GetSingleton();
1129     aResult = cc->GetAppInfo().version;
1130     return NS_OK;
1131   }
1132   aResult.Assign(gAppData->version);
1133
1134   return NS_OK;
1135 }
1136
1137 NS_IMETHODIMP
1138 nsXULAppInfo::GetPlatformVersion(nsACString& aResult) {
1139   aResult.Assign(gToolkitVersion);
1140
1141   return NS_OK;
1142 }
1143
1144 NS_IMETHODIMP
1145 nsXULAppInfo::GetAppBuildID(nsACString& aResult) {
1146   if (XRE_IsContentProcess()) {
1147     ContentChild* cc = ContentChild::GetSingleton();
1148     aResult = cc->GetAppInfo().buildID;
1149     return NS_OK;
1150   }
1151   aResult.Assign(gAppData->buildID);
1152
1153   return NS_OK;
1154 }
1155
1156 NS_IMETHODIMP
1157 nsXULAppInfo::GetPlatformBuildID(nsACString& aResult) {
1158   aResult.Assign(gToolkitBuildID);
1159
1160   return NS_OK;
1161 }
1162
1163 NS_IMETHODIMP
1164 nsXULAppInfo::GetUAName(nsACString& aResult) {
1165   if (XRE_IsContentProcess()) {
1166     ContentChild* cc = ContentChild::GetSingleton();
1167     aResult = cc->GetAppInfo().UAName;
1168     return NS_OK;
1169   }
1170   aResult.Assign(gAppData->UAName);
1171
1172   return NS_OK;
1173 }
1174
1175 NS_IMETHODIMP
1176 nsXULAppInfo::GetSourceURL(nsACString& aResult) {
1177   if (XRE_IsContentProcess()) {
1178     ContentChild* cc = ContentChild::GetSingleton();
1179     aResult = cc->GetAppInfo().sourceURL;
1180     return NS_OK;
1181   }
1182   aResult.Assign(gAppData->sourceURL);
1183
1184   return NS_OK;
1185 }
1186
1187 NS_IMETHODIMP
1188 nsXULAppInfo::GetUpdateURL(nsACString& aResult) {
1189   if (XRE_IsContentProcess()) {
1190     ContentChild* cc = ContentChild::GetSingleton();
1191     aResult = cc->GetAppInfo().updateURL;
1192     return NS_OK;
1193   }
1194   aResult.Assign(gAppData->updateURL);
1195
1196   return NS_OK;
1197 }
1198
1199 NS_IMETHODIMP
1200 nsXULAppInfo::GetLogConsoleErrors(bool* aResult) {
1201   *aResult = gLogConsoleErrors;
1202   return NS_OK;
1203 }
1204
1205 NS_IMETHODIMP
1206 nsXULAppInfo::SetLogConsoleErrors(bool aValue) {
1207   gLogConsoleErrors = aValue;
1208   return NS_OK;
1209 }
1210
1211 NS_IMETHODIMP
1212 nsXULAppInfo::GetInSafeMode(bool* aResult) {
1213   *aResult = gSafeMode;
1214   return NS_OK;
1215 }
1216
1217 NS_IMETHODIMP
1218 nsXULAppInfo::GetOS(nsACString& aResult) {
1219   aResult.AssignLiteral(OS_TARGET);
1220   return NS_OK;
1221 }
1222
1223 NS_IMETHODIMP
1224 nsXULAppInfo::GetXPCOMABI(nsACString& aResult) {
1225 #ifdef TARGET_XPCOM_ABI
1226   aResult.AssignLiteral(TARGET_XPCOM_ABI);
1227   return NS_OK;
1228 #else
1229   return NS_ERROR_NOT_AVAILABLE;
1230 #endif
1231 }
1232
1233 NS_IMETHODIMP
1234 nsXULAppInfo::GetWidgetToolkit(nsACString& aResult) {
1235   aResult.AssignLiteral(MOZ_WIDGET_TOOLKIT);
1236   return NS_OK;
1237 }
1238
1239 // Ensure that the GeckoProcessType enum, defined in xpcom/build/nsXULAppAPI.h,
1240 // is synchronized with the const unsigned longs defined in
1241 // xpcom/system/nsIXULRuntime.idl.
1242 #define GECKO_PROCESS_TYPE(enum_value, enum_name, string_name, proc_typename, \
1243                            process_bin_type, procinfo_typename,               \
1244                            webidl_typename, allcaps_name)                     \
1245   static_assert(nsIXULRuntime::PROCESS_TYPE_##allcaps_name ==                 \
1246                     static_cast<int>(GeckoProcessType_##enum_name),           \
1247                 "GeckoProcessType in nsXULAppAPI.h not synchronized with "    \
1248                 "nsIXULRuntime.idl");
1249 #include "mozilla/GeckoProcessTypes.h"
1250 #undef GECKO_PROCESS_TYPE
1251
1252 // .. and ensure that that is all of them:
1253 static_assert(GeckoProcessType_Utility + 1 == GeckoProcessType_End,
1254               "Did not find the final GeckoProcessType");
1255
1256 NS_IMETHODIMP
1257 nsXULAppInfo::GetProcessType(uint32_t* aResult) {
1258   NS_ENSURE_ARG_POINTER(aResult);
1259   *aResult = XRE_GetProcessType();
1260   return NS_OK;
1261 }
1262
1263 NS_IMETHODIMP
1264 nsXULAppInfo::GetProcessID(uint32_t* aResult) {
1265 #ifdef XP_WIN
1266   *aResult = GetCurrentProcessId();
1267 #else
1268   *aResult = getpid();
1269 #endif
1270   return NS_OK;
1271 }
1272
1273 NS_IMETHODIMP
1274 nsXULAppInfo::GetUniqueProcessID(uint64_t* aResult) {
1275   if (XRE_IsContentProcess()) {
1276     ContentChild* cc = ContentChild::GetSingleton();
1277     *aResult = cc->GetID();
1278   } else {
1279     *aResult = 0;
1280   }
1281   return NS_OK;
1282 }
1283
1284 NS_IMETHODIMP
1285 nsXULAppInfo::GetRemoteType(nsACString& aRemoteType) {
1286   if (XRE_IsContentProcess()) {
1287     aRemoteType = ContentChild::GetSingleton()->GetRemoteType();
1288   } else {
1289     aRemoteType = NOT_REMOTE_TYPE;
1290   }
1291
1292   return NS_OK;
1293 }
1294
1295 static nsCString gLastAppVersion;
1296 static nsCString gLastAppBuildID;
1297
1298 NS_IMETHODIMP
1299 nsXULAppInfo::GetLastAppVersion(nsACString& aResult) {
1300   if (XRE_IsContentProcess()) {
1301     return NS_ERROR_NOT_AVAILABLE;
1302   }
1303
1304   if (!gLastAppVersion.IsVoid() && gLastAppVersion.IsEmpty()) {
1305     NS_WARNING("Attempt to retrieve lastAppVersion before it has been set.");
1306     return NS_ERROR_NOT_AVAILABLE;
1307   }
1308
1309   aResult.Assign(gLastAppVersion);
1310   return NS_OK;
1311 }
1312
1313 NS_IMETHODIMP
1314 nsXULAppInfo::GetLastAppBuildID(nsACString& aResult) {
1315   if (XRE_IsContentProcess()) {
1316     return NS_ERROR_NOT_AVAILABLE;
1317   }
1318
1319   if (!gLastAppBuildID.IsVoid() && gLastAppBuildID.IsEmpty()) {
1320     NS_WARNING("Attempt to retrieve lastAppBuildID before it has been set.");
1321     return NS_ERROR_NOT_AVAILABLE;
1322   }
1323
1324   aResult.Assign(gLastAppBuildID);
1325   return NS_OK;
1326 }
1327
1328 NS_IMETHODIMP
1329 nsXULAppInfo::GetFissionAutostart(bool* aResult) {
1330   *aResult = FissionAutostart();
1331   return NS_OK;
1332 }
1333
1334 NS_IMETHODIMP
1335 nsXULAppInfo::GetWin32kExperimentStatus(ExperimentStatus* aResult) {
1336   if (!XRE_IsParentProcess()) {
1337     return NS_ERROR_NOT_AVAILABLE;
1338   }
1339
1340   EnsureWin32kInitialized();
1341   *aResult = gWin32kExperimentStatus;
1342   return NS_OK;
1343 }
1344
1345 NS_IMETHODIMP
1346 nsXULAppInfo::GetWin32kLiveStatusTestingOnly(
1347     nsIXULRuntime::ContentWin32kLockdownState* aResult) {
1348   if (!XRE_IsParentProcess()) {
1349     return NS_ERROR_NOT_AVAILABLE;
1350   }
1351
1352   EnsureWin32kInitialized();
1353   *aResult = GetLiveWin32kLockdownState();
1354   return NS_OK;
1355 }
1356
1357 NS_IMETHODIMP
1358 nsXULAppInfo::GetWin32kSessionStatus(
1359     nsIXULRuntime::ContentWin32kLockdownState* aResult) {
1360   if (!XRE_IsParentProcess()) {
1361     return NS_ERROR_NOT_AVAILABLE;
1362   }
1363
1364   EnsureWin32kInitialized();
1365   *aResult = gWin32kStatus;
1366   return NS_OK;
1367 }
1368
1369 NS_IMETHODIMP
1370 nsXULAppInfo::GetFissionDecisionStatus(FissionDecisionStatus* aResult) {
1371   if (!XRE_IsParentProcess()) {
1372     return NS_ERROR_NOT_AVAILABLE;
1373   }
1374
1375   EnsureFissionAutostartInitialized();
1376
1377   MOZ_ASSERT(gFissionDecisionStatus != eFissionStatusUnknown);
1378   *aResult = gFissionDecisionStatus;
1379   return NS_OK;
1380 }
1381
1382 NS_IMETHODIMP
1383 nsXULAppInfo::GetFissionDecisionStatusString(nsACString& aResult) {
1384   if (!XRE_IsParentProcess()) {
1385     return NS_ERROR_NOT_AVAILABLE;
1386   }
1387
1388   EnsureFissionAutostartInitialized();
1389   switch (gFissionDecisionStatus) {
1390     case eFissionExperimentControl:
1391       aResult = "experimentControl";
1392       break;
1393     case eFissionExperimentTreatment:
1394       aResult = "experimentTreatment";
1395       break;
1396     case eFissionDisabledByE10sEnv:
1397       aResult = "disabledByE10sEnv";
1398       break;
1399     case eFissionEnabledByEnv:
1400       aResult = "enabledByEnv";
1401       break;
1402     case eFissionDisabledByEnv:
1403       aResult = "disabledByEnv";
1404       break;
1405     case eFissionEnabledByDefault:
1406       aResult = "enabledByDefault";
1407       break;
1408     case eFissionDisabledByDefault:
1409       aResult = "disabledByDefault";
1410       break;
1411     case eFissionEnabledByUserPref:
1412       aResult = "enabledByUserPref";
1413       break;
1414     case eFissionDisabledByUserPref:
1415       aResult = "disabledByUserPref";
1416       break;
1417     case eFissionDisabledByE10sOther:
1418       aResult = "disabledByE10sOther";
1419       break;
1420     case eFissionEnabledByRollout:
1421       aResult = "enabledByRollout";
1422       break;
1423     default:
1424       MOZ_ASSERT_UNREACHABLE("Unexpected enum value");
1425   }
1426   return NS_OK;
1427 }
1428
1429 NS_IMETHODIMP
1430 nsXULAppInfo::GetSessionHistoryInParent(bool* aResult) {
1431   *aResult = SessionHistoryInParent();
1432   return NS_OK;
1433 }
1434
1435 NS_IMETHODIMP
1436 nsXULAppInfo::GetSessionStorePlatformCollection(bool* aResult) {
1437   *aResult = SessionStorePlatformCollection();
1438   return NS_OK;
1439 }
1440
1441 NS_IMETHODIMP
1442 nsXULAppInfo::GetBrowserTabsRemoteAutostart(bool* aResult) {
1443   *aResult = BrowserTabsRemoteAutostart();
1444   return NS_OK;
1445 }
1446
1447 NS_IMETHODIMP
1448 nsXULAppInfo::GetMaxWebProcessCount(uint32_t* aResult) {
1449   *aResult = mozilla::GetMaxWebProcessCount();
1450   return NS_OK;
1451 }
1452
1453 NS_IMETHODIMP
1454 nsXULAppInfo::GetAccessibilityEnabled(bool* aResult) {
1455 #ifdef ACCESSIBILITY
1456   *aResult = GetAccService() != nullptr;
1457 #else
1458   *aResult = false;
1459 #endif
1460   return NS_OK;
1461 }
1462
1463 NS_IMETHODIMP
1464 nsXULAppInfo::GetAccessibilityInstantiator(nsAString& aInstantiator) {
1465 #if defined(ACCESSIBILITY) && defined(XP_WIN)
1466   if (!GetAccService()) {
1467     aInstantiator.Truncate();
1468     return NS_OK;
1469   }
1470   nsAutoString ipClientInfo;
1471   a11y::Compatibility::GetHumanReadableConsumersStr(ipClientInfo);
1472   aInstantiator.Append(ipClientInfo);
1473   aInstantiator.AppendLiteral("|");
1474
1475   nsCOMPtr<nsIFile> oopClientExe;
1476   if (a11y::GetInstantiator(getter_AddRefs(oopClientExe))) {
1477     nsAutoString oopClientInfo;
1478     if (NS_SUCCEEDED(oopClientExe->GetPath(oopClientInfo))) {
1479       aInstantiator.Append(oopClientInfo);
1480     }
1481   }
1482 #else
1483   aInstantiator.Truncate();
1484 #endif
1485   return NS_OK;
1486 }
1487
1488 NS_IMETHODIMP
1489 nsXULAppInfo::GetIs64Bit(bool* aResult) {
1490 #ifdef HAVE_64BIT_BUILD
1491   *aResult = true;
1492 #else
1493   *aResult = false;
1494 #endif
1495   return NS_OK;
1496 }
1497
1498 NS_IMETHODIMP
1499 nsXULAppInfo::GetIsTextRecognitionSupported(bool* aResult) {
1500   *aResult = widget::TextRecognition::IsSupported();
1501   return NS_OK;
1502 }
1503
1504 NS_IMETHODIMP
1505 nsXULAppInfo::EnsureContentProcess() {
1506   if (!XRE_IsParentProcess()) return NS_ERROR_NOT_AVAILABLE;
1507
1508   RefPtr<ContentParent> unused =
1509       ContentParent::GetNewOrUsedBrowserProcess(DEFAULT_REMOTE_TYPE);
1510   return NS_OK;
1511 }
1512
1513 NS_IMETHODIMP
1514 nsXULAppInfo::InvalidateCachesOnRestart() {
1515   nsCOMPtr<nsIFile> file;
1516   nsresult rv =
1517       NS_GetSpecialDirectory(NS_APP_PROFILE_DIR_STARTUP, getter_AddRefs(file));
1518   if (NS_FAILED(rv)) return rv;
1519   if (!file) return NS_ERROR_NOT_AVAILABLE;
1520
1521   file->AppendNative(FILE_COMPATIBILITY_INFO);
1522
1523   nsINIParser parser;
1524   rv = parser.Init(file);
1525   if (NS_FAILED(rv)) {
1526     // This fails if compatibility.ini is not there, so we'll
1527     // flush the caches on the next restart anyways.
1528     return NS_OK;
1529   }
1530
1531   nsAutoCString buf;
1532   rv = parser.GetString("Compatibility", "InvalidateCaches", buf);
1533
1534   if (NS_FAILED(rv)) {
1535     PRFileDesc* fd;
1536     rv = file->OpenNSPRFileDesc(PR_RDWR | PR_APPEND, 0600, &fd);
1537     if (NS_FAILED(rv)) {
1538       NS_ERROR("could not create output stream");
1539       return NS_ERROR_NOT_AVAILABLE;
1540     }
1541     static const char kInvalidationHeader[] =
1542         NS_LINEBREAK "InvalidateCaches=1" NS_LINEBREAK;
1543     PR_Write(fd, kInvalidationHeader, sizeof(kInvalidationHeader) - 1);
1544     PR_Close(fd);
1545   }
1546   return NS_OK;
1547 }
1548
1549 NS_IMETHODIMP
1550 nsXULAppInfo::GetReplacedLockTime(PRTime* aReplacedLockTime) {
1551   if (!gProfileLock) return NS_ERROR_NOT_AVAILABLE;
1552   gProfileLock->GetReplacedLockTime(aReplacedLockTime);
1553   return NS_OK;
1554 }
1555
1556 NS_IMETHODIMP
1557 nsXULAppInfo::GetDefaultUpdateChannel(nsACString& aResult) {
1558   aResult.AssignLiteral(MOZ_STRINGIFY(MOZ_UPDATE_CHANNEL));
1559   return NS_OK;
1560 }
1561
1562 NS_IMETHODIMP
1563 nsXULAppInfo::GetDistributionID(nsACString& aResult) {
1564   aResult.AssignLiteral(MOZ_DISTRIBUTION_ID);
1565   return NS_OK;
1566 }
1567
1568 NS_IMETHODIMP
1569 nsXULAppInfo::GetWindowsDLLBlocklistStatus(bool* aResult) {
1570 #if defined(HAS_DLL_BLOCKLIST)
1571   *aResult = DllBlocklist_CheckStatus();
1572 #else
1573   *aResult = false;
1574 #endif
1575   return NS_OK;
1576 }
1577
1578 NS_IMETHODIMP
1579 nsXULAppInfo::GetRestartedByOS(bool* aResult) {
1580   *aResult = gRestartedByOS;
1581   return NS_OK;
1582 }
1583
1584 NS_IMETHODIMP
1585 nsXULAppInfo::GetChromeColorSchemeIsDark(bool* aResult) {
1586   PreferenceSheet::EnsureInitialized();
1587   *aResult = PreferenceSheet::ColorSchemeForChrome() == ColorScheme::Dark;
1588   return NS_OK;
1589 }
1590
1591 NS_IMETHODIMP
1592 nsXULAppInfo::GetContentThemeDerivedColorSchemeIsDark(bool* aResult) {
1593   *aResult =
1594       PreferenceSheet::ThemeDerivedColorSchemeForContent() == ColorScheme::Dark;
1595   return NS_OK;
1596 }
1597
1598 NS_IMETHODIMP
1599 nsXULAppInfo::GetPrefersReducedMotion(bool* aResult) {
1600   *aResult =
1601       LookAndFeel::GetInt(LookAndFeel::IntID::PrefersReducedMotion, 0) == 1;
1602   return NS_OK;
1603 }
1604
1605 NS_IMETHODIMP
1606 nsXULAppInfo::GetDrawInTitlebar(bool* aResult) {
1607   *aResult = LookAndFeel::DrawInTitlebar();
1608   return NS_OK;
1609 }
1610
1611 NS_IMETHODIMP
1612 nsXULAppInfo::GetDesktopEnvironment(nsACString& aDesktopEnvironment) {
1613 #ifdef MOZ_WIDGET_GTK
1614   aDesktopEnvironment.Assign(GetDesktopEnvironmentIdentifier());
1615 #endif
1616   return NS_OK;
1617 }
1618
1619 NS_IMETHODIMP
1620 nsXULAppInfo::GetIsWayland(bool* aResult) {
1621 #ifdef MOZ_WIDGET_GTK
1622   *aResult = GdkIsWaylandDisplay();
1623 #else
1624   *aResult = false;
1625 #endif
1626   return NS_OK;
1627 }
1628
1629 NS_IMETHODIMP
1630 nsXULAppInfo::GetProcessStartupShortcut(nsAString& aShortcut) {
1631 #if defined(XP_WIN)
1632   if (XRE_IsParentProcess()) {
1633     aShortcut.Assign(gProcessStartupShortcut);
1634     return NS_OK;
1635   }
1636 #endif
1637   return NS_ERROR_NOT_AVAILABLE;
1638 }
1639
1640 #if defined(XP_WIN) && defined(MOZ_LAUNCHER_PROCESS)
1641 // Forward declaration
1642 void SetupLauncherProcessPref();
1643
1644 static Maybe<LauncherRegistryInfo::EnabledState> gLauncherProcessState;
1645 #endif  // defined(XP_WIN) && defined(MOZ_LAUNCHER_PROCESS)
1646
1647 NS_IMETHODIMP
1648 nsXULAppInfo::GetLauncherProcessState(uint32_t* aResult) {
1649 #if defined(XP_WIN) && defined(MOZ_LAUNCHER_PROCESS)
1650   SetupLauncherProcessPref();
1651
1652   if (!gLauncherProcessState) {
1653     return NS_ERROR_UNEXPECTED;
1654   }
1655
1656   *aResult = static_cast<uint32_t>(gLauncherProcessState.value());
1657   return NS_OK;
1658 #else
1659   return NS_ERROR_NOT_AVAILABLE;
1660 #endif
1661 }
1662
1663 #ifdef XP_WIN
1664 NS_IMETHODIMP
1665 nsXULAppInfo::GetUserCanElevate(bool* aUserCanElevate) {
1666   HANDLE rawToken;
1667   if (!::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY, &rawToken)) {
1668     *aUserCanElevate = false;
1669     return NS_OK;
1670   }
1671
1672   nsAutoHandle token(rawToken);
1673   LauncherResult<TOKEN_ELEVATION_TYPE> elevationType = GetElevationType(token);
1674   if (elevationType.isErr()) {
1675     *aUserCanElevate = false;
1676     return NS_OK;
1677   }
1678
1679   // The possible values returned for elevationType and their meanings are:
1680   //   TokenElevationTypeDefault: The token does not have a linked token
1681   //     (e.g. UAC disabled or a standard user, so they can't be elevated)
1682   //   TokenElevationTypeFull: The token is linked to an elevated token
1683   //     (e.g. UAC is enabled and the user is already elevated so they can't
1684   //      be elevated again)
1685   //   TokenElevationTypeLimited: The token is linked to a limited token
1686   //     (e.g. UAC is enabled and the user is not elevated, so they can be
1687   //      elevated)
1688   *aUserCanElevate = (elevationType.inspect() == TokenElevationTypeLimited);
1689   return NS_OK;
1690 }
1691 #endif
1692
1693 NS_IMETHODIMP
1694 nsXULAppInfo::GetCrashReporterEnabled(bool* aEnabled) {
1695   *aEnabled = CrashReporter::GetEnabled();
1696   return NS_OK;
1697 }
1698
1699 NS_IMETHODIMP
1700 nsXULAppInfo::SetEnabled(bool aEnabled) {
1701   if (aEnabled) {
1702     if (CrashReporter::GetEnabled()) {
1703       // no point in erroring for double-enabling
1704       return NS_OK;
1705     }
1706
1707     nsCOMPtr<nsIFile> greBinDir;
1708     NS_GetSpecialDirectory(NS_GRE_BIN_DIR, getter_AddRefs(greBinDir));
1709     if (!greBinDir) {
1710       return NS_ERROR_FAILURE;
1711     }
1712
1713     nsCOMPtr<nsIFile> xreBinDirectory = greBinDir;
1714     if (!xreBinDirectory) {
1715       return NS_ERROR_FAILURE;
1716     }
1717
1718     return CrashReporter::SetExceptionHandler(xreBinDirectory, true);
1719   }
1720
1721   if (!CrashReporter::GetEnabled()) {
1722     // no point in erroring for double-disabling
1723     return NS_OK;
1724   }
1725
1726   return CrashReporter::UnsetExceptionHandler();
1727 }
1728
1729 NS_IMETHODIMP
1730 nsXULAppInfo::GetServerURL(nsIURL** aServerURL) {
1731   NS_ENSURE_ARG_POINTER(aServerURL);
1732   if (!CrashReporter::GetEnabled()) return NS_ERROR_NOT_INITIALIZED;
1733
1734   nsAutoCString data;
1735   if (!CrashReporter::GetServerURL(data)) {
1736     return NS_ERROR_FAILURE;
1737   }
1738   nsCOMPtr<nsIURI> uri;
1739   NS_NewURI(getter_AddRefs(uri), data);
1740   if (!uri) return NS_ERROR_FAILURE;
1741
1742   nsCOMPtr<nsIURL> url;
1743   url = do_QueryInterface(uri);
1744   NS_ADDREF(*aServerURL = url);
1745
1746   return NS_OK;
1747 }
1748
1749 NS_IMETHODIMP
1750 nsXULAppInfo::SetServerURL(nsIURL* aServerURL) {
1751   // Only allow https or http URLs
1752   if (!aServerURL->SchemeIs("http") && !aServerURL->SchemeIs("https")) {
1753     return NS_ERROR_INVALID_ARG;
1754   }
1755
1756   nsAutoCString spec;
1757   nsresult rv = aServerURL->GetSpec(spec);
1758   NS_ENSURE_SUCCESS(rv, rv);
1759
1760   return CrashReporter::SetServerURL(spec);
1761 }
1762
1763 NS_IMETHODIMP
1764 nsXULAppInfo::GetMinidumpPath(nsIFile** aMinidumpPath) {
1765   if (!CrashReporter::GetEnabled()) return NS_ERROR_NOT_INITIALIZED;
1766
1767   nsAutoString path;
1768   if (!CrashReporter::GetMinidumpPath(path)) return NS_ERROR_FAILURE;
1769
1770   nsresult rv = NS_NewLocalFile(path, false, aMinidumpPath);
1771   NS_ENSURE_SUCCESS(rv, rv);
1772   return NS_OK;
1773 }
1774
1775 NS_IMETHODIMP
1776 nsXULAppInfo::SetMinidumpPath(nsIFile* aMinidumpPath) {
1777   nsAutoString path;
1778   nsresult rv = aMinidumpPath->GetPath(path);
1779   NS_ENSURE_SUCCESS(rv, rv);
1780   return CrashReporter::SetMinidumpPath(path);
1781 }
1782
1783 NS_IMETHODIMP
1784 nsXULAppInfo::GetMinidumpForID(const nsAString& aId, nsIFile** aMinidump) {
1785   if (!CrashReporter::GetMinidumpForID(aId, aMinidump)) {
1786     return NS_ERROR_FILE_NOT_FOUND;
1787   }
1788
1789   return NS_OK;
1790 }
1791
1792 NS_IMETHODIMP
1793 nsXULAppInfo::GetExtraFileForID(const nsAString& aId, nsIFile** aExtraFile) {
1794   if (!CrashReporter::GetExtraFileForID(aId, aExtraFile)) {
1795     return NS_ERROR_FILE_NOT_FOUND;
1796   }
1797
1798   return NS_OK;
1799 }
1800
1801 NS_IMETHODIMP
1802 nsXULAppInfo::AnnotateCrashReport(const nsACString& key,
1803                                   const nsACString& data) {
1804   CrashReporter::Annotation annotation;
1805
1806   if (!AnnotationFromString(annotation, PromiseFlatCString(key).get())) {
1807     return NS_ERROR_INVALID_ARG;
1808   }
1809
1810   CrashReporter::RecordAnnotationNSCString(annotation, data);
1811   return NS_OK;
1812 }
1813
1814 NS_IMETHODIMP
1815 nsXULAppInfo::RemoveCrashReportAnnotation(const nsACString& key) {
1816   CrashReporter::Annotation annotation;
1817
1818   if (!AnnotationFromString(annotation, PromiseFlatCString(key).get())) {
1819     return NS_ERROR_INVALID_ARG;
1820   }
1821
1822   CrashReporter::UnrecordAnnotation(annotation);
1823   return NS_OK;
1824 }
1825
1826 NS_IMETHODIMP
1827 nsXULAppInfo::IsAnnotationAllowedForPing(const nsACString& aValue,
1828                                          bool* aIsAllowed) {
1829   CrashReporter::Annotation annotation;
1830
1831   if (!AnnotationFromString(annotation, PromiseFlatCString(aValue).get())) {
1832     return NS_ERROR_INVALID_ARG;
1833   }
1834
1835   *aIsAllowed = CrashReporter::IsAnnotationAllowedForPing(annotation);
1836
1837   return NS_OK;
1838 }
1839
1840 NS_IMETHODIMP
1841 nsXULAppInfo::AppendAppNotesToCrashReport(const nsACString& data) {
1842   return CrashReporter::AppendAppNotesToCrashReport(data);
1843 }
1844
1845 NS_IMETHODIMP
1846 nsXULAppInfo::RegisterAppMemory(uint64_t pointer, uint64_t len) {
1847   return CrashReporter::RegisterAppMemory((void*)pointer, len);
1848 }
1849
1850 NS_IMETHODIMP
1851 nsXULAppInfo::WriteMinidumpForException(void* aExceptionInfo) {
1852 #ifdef XP_WIN
1853   return CrashReporter::WriteMinidumpForException(
1854       static_cast<EXCEPTION_POINTERS*>(aExceptionInfo));
1855 #else
1856   return NS_ERROR_NOT_IMPLEMENTED;
1857 #endif
1858 }
1859
1860 NS_IMETHODIMP
1861 nsXULAppInfo::AppendObjCExceptionInfoToAppNotes(void* aException) {
1862 #ifdef XP_MACOSX
1863   return CrashReporter::AppendObjCExceptionInfoToAppNotes(aException);
1864 #else
1865   return NS_ERROR_NOT_IMPLEMENTED;
1866 #endif
1867 }
1868
1869 NS_IMETHODIMP
1870 nsXULAppInfo::GetSubmitReports(bool* aEnabled) {
1871   return CrashReporter::GetSubmitReports(aEnabled);
1872 }
1873
1874 NS_IMETHODIMP
1875 nsXULAppInfo::SetSubmitReports(bool aEnabled) {
1876   return CrashReporter::SetSubmitReports(aEnabled);
1877 }
1878
1879 NS_IMETHODIMP
1880 nsXULAppInfo::UpdateCrashEventsDir() {
1881   CrashReporter::UpdateCrashEventsDir();
1882   return NS_OK;
1883 }
1884
1885 NS_IMETHODIMP
1886 nsXULAppInfo::SaveMemoryReport() {
1887   if (!CrashReporter::GetEnabled()) {
1888     return NS_ERROR_NOT_INITIALIZED;
1889   }
1890   nsCOMPtr<nsIFile> file;
1891   nsresult rv = CrashReporter::GetDefaultMemoryReportFile(getter_AddRefs(file));
1892   if (NS_WARN_IF(NS_FAILED(rv))) {
1893     return rv;
1894   }
1895
1896   nsString path;
1897   file->GetPath(path);
1898
1899   nsCOMPtr<nsIMemoryInfoDumper> dumper =
1900       do_GetService("@mozilla.org/memory-info-dumper;1");
1901   if (NS_WARN_IF(!dumper)) {
1902     return NS_ERROR_UNEXPECTED;
1903   }
1904
1905   rv = dumper->DumpMemoryReportsToNamedFile(
1906       path, this, file, true /* anonymize */, false /* minimizeMemoryUsage */);
1907   if (NS_WARN_IF(NS_FAILED(rv))) {
1908     return rv;
1909   }
1910   return NS_OK;
1911 }
1912
1913 // This method is from nsIFInishDumpingCallback.
1914 NS_IMETHODIMP
1915 nsXULAppInfo::Callback(nsISupports* aData) {
1916   nsCOMPtr<nsIFile> file = do_QueryInterface(aData);
1917   MOZ_ASSERT(file);
1918
1919   CrashReporter::SetMemoryReportFile(file);
1920   return NS_OK;
1921 }
1922
1923 static const nsXULAppInfo kAppInfo;
1924 namespace mozilla {
1925 nsresult AppInfoConstructor(REFNSIID aIID, void** aResult) {
1926   return const_cast<nsXULAppInfo*>(&kAppInfo)->QueryInterface(aIID, aResult);
1927 }
1928 }  // namespace mozilla
1929
1930 bool gLogConsoleErrors = false;
1931
1932 #define NS_ENSURE_TRUE_LOG(x, ret)               \
1933   PR_BEGIN_MACRO                                 \
1934   if (MOZ_UNLIKELY(!(x))) {                      \
1935     NS_WARNING("NS_ENSURE_TRUE(" #x ") failed"); \
1936     gLogConsoleErrors = true;                    \
1937     return ret;                                  \
1938   }                                              \
1939   PR_END_MACRO
1940
1941 #define NS_ENSURE_SUCCESS_LOG(res, ret) \
1942   NS_ENSURE_TRUE_LOG(NS_SUCCEEDED(res), ret)
1943
1944 /**
1945  * Because we're starting/stopping XPCOM several times in different scenarios,
1946  * this class is a stack-based critter that makes sure that XPCOM is shut down
1947  * during early returns.
1948  */
1949
1950 class ScopedXPCOMStartup {
1951  public:
1952   ScopedXPCOMStartup() : mServiceManager(nullptr) {}
1953   ~ScopedXPCOMStartup();
1954
1955   nsresult Initialize(bool aInitJSContext = true);
1956   nsresult SetWindowCreator(nsINativeAppSupport* native);
1957
1958  private:
1959   nsIServiceManager* mServiceManager;
1960   static nsINativeAppSupport* gNativeAppSupport;
1961
1962   friend already_AddRefed<nsINativeAppSupport> NS_GetNativeAppSupport();
1963 };
1964
1965 ScopedXPCOMStartup::~ScopedXPCOMStartup() {
1966   NS_IF_RELEASE(gNativeAppSupport);
1967
1968   if (mServiceManager) {
1969 #ifdef XP_MACOSX
1970     // On OS X, we need a pool to catch cocoa objects that are autoreleased
1971     // during teardown.
1972     mozilla::MacAutoreleasePool pool;
1973 #endif
1974
1975     nsCOMPtr<nsIAppStartup> appStartup(components::AppStartup::Service());
1976     if (appStartup) appStartup->DestroyHiddenWindow();
1977
1978     gDirServiceProvider->DoShutdown();
1979     PROFILER_MARKER_UNTYPED("Shutdown early", OTHER);
1980
1981     WriteConsoleLog();
1982
1983     NS_ShutdownXPCOM(mServiceManager);
1984     mServiceManager = nullptr;
1985   }
1986 }
1987
1988 nsresult ScopedXPCOMStartup::Initialize(bool aInitJSContext) {
1989   NS_ASSERTION(gDirServiceProvider, "Should not get here!");
1990
1991   nsresult rv;
1992
1993   rv = NS_InitXPCOM(&mServiceManager, gDirServiceProvider->GetAppDir(),
1994                     gDirServiceProvider, aInitJSContext);
1995   if (NS_FAILED(rv)) {
1996     NS_ERROR("Couldn't start xpcom!");
1997     mServiceManager = nullptr;
1998   } else {
1999 #ifdef DEBUG
2000     nsCOMPtr<nsIComponentRegistrar> reg = do_QueryInterface(mServiceManager);
2001     NS_ASSERTION(reg, "Service Manager doesn't QI to Registrar.");
2002 #endif
2003   }
2004
2005   return rv;
2006 }
2007
2008 /**
2009  * This is a little factory class that serves as a singleton-service-factory
2010  * for the nativeappsupport object.
2011  */
2012 class nsSingletonFactory final : public nsIFactory {
2013  public:
2014   NS_DECL_ISUPPORTS
2015   NS_DECL_NSIFACTORY
2016
2017   explicit nsSingletonFactory(nsISupports* aSingleton);
2018
2019  private:
2020   ~nsSingletonFactory() = default;
2021   nsCOMPtr<nsISupports> mSingleton;
2022 };
2023
2024 nsSingletonFactory::nsSingletonFactory(nsISupports* aSingleton)
2025     : mSingleton(aSingleton) {
2026   NS_ASSERTION(mSingleton, "Singleton was null!");
2027 }
2028
2029 NS_IMPL_ISUPPORTS(nsSingletonFactory, nsIFactory)
2030
2031 NS_IMETHODIMP
2032 nsSingletonFactory::CreateInstance(const nsIID& aIID, void** aResult) {
2033   return mSingleton->QueryInterface(aIID, aResult);
2034 }
2035
2036 /**
2037  * Set our windowcreator on the WindowWatcher service.
2038  */
2039 nsresult ScopedXPCOMStartup::SetWindowCreator(nsINativeAppSupport* native) {
2040   nsresult rv;
2041
2042   NS_IF_ADDREF(gNativeAppSupport = native);
2043
2044   nsCOMPtr<nsIWindowCreator> creator(components::AppStartup::Service());
2045   if (!creator) return NS_ERROR_UNEXPECTED;
2046
2047   nsCOMPtr<nsIWindowWatcher> wwatch(
2048       do_GetService(NS_WINDOWWATCHER_CONTRACTID, &rv));
2049   NS_ENSURE_SUCCESS(rv, rv);
2050
2051   return wwatch->SetWindowCreator(creator);
2052 }
2053
2054 /* static */ already_AddRefed<nsINativeAppSupport> NS_GetNativeAppSupport() {
2055   if (!ScopedXPCOMStartup::gNativeAppSupport) {
2056     return nullptr;
2057   }
2058
2059   return do_AddRef(ScopedXPCOMStartup::gNativeAppSupport);
2060 }
2061
2062 nsINativeAppSupport* ScopedXPCOMStartup::gNativeAppSupport;
2063
2064 static void DumpArbitraryHelp() {
2065   nsresult rv;
2066
2067   ScopedLogging log;
2068
2069   {
2070     ScopedXPCOMStartup xpcom;
2071     xpcom.Initialize();
2072
2073     nsCOMPtr<nsICommandLineRunner> cmdline(new nsCommandLine());
2074
2075     nsCString text;
2076     rv = cmdline->GetHelpText(text);
2077     if (NS_SUCCEEDED(rv)) printf("%s", text.get());
2078   }
2079 }
2080
2081 // English text needs to go into a dtd file.
2082 // But when this is called we have no components etc. These strings must either
2083 // be here, or in a native resource file.
2084 static void DumpHelp() {
2085   printf(
2086       "Usage: %s [ options ... ] [URL]\n"
2087       "       where options include:\n\n",
2088       gArgv[0]);
2089
2090 #ifdef MOZ_X11
2091   printf(
2092       "X11 options\n"
2093       "  --display=DISPLAY  X display to use\n"
2094       "  --sync             Make X calls synchronous\n");
2095 #endif
2096 #ifdef XP_UNIX
2097   printf(
2098       "  --g-fatal-warnings Make all warnings fatal\n"
2099       "\n%s options\n",
2100       (const char*)gAppData->name);
2101 #endif
2102
2103   printf(
2104       "  -h or --help       Print this message.\n"
2105       "  -v or --version    Print %s version.\n"
2106       "  --full-version     Print %s version, build and platform build ids.\n"
2107       "  -P <profile>       Start with <profile>.\n"
2108       "  --profile <path>   Start with profile at <path>.\n"
2109       "  --migration        Start with migration wizard.\n"
2110       "  --ProfileManager   Start with ProfileManager.\n"
2111 #ifdef MOZ_HAS_REMOTE
2112       "  --no-remote        Do not accept or send remote commands; implies\n"
2113       "                     --new-instance.\n"
2114       "  --new-instance     Open new instance, not a new window in running "
2115       "instance.\n"
2116 #endif
2117       "  --safe-mode        Disables extensions and themes for this session.\n"
2118 #ifdef MOZ_BLOCK_PROFILE_DOWNGRADE
2119       "  --allow-downgrade  Allows downgrading a profile.\n"
2120 #endif
2121       "  --MOZ_LOG=<modules> Treated as MOZ_LOG=<modules> environment "
2122       "variable,\n"
2123       "                     overrides it.\n"
2124       "  --MOZ_LOG_FILE=<file> Treated as MOZ_LOG_FILE=<file> environment "
2125       "variable,\n"
2126       "                     overrides it. If MOZ_LOG_FILE is not specified as "
2127       "an\n"
2128       "                     argument or as an environment variable, logging "
2129       "will be\n"
2130       "                     written to stdout.\n",
2131       (const char*)gAppData->name, (const char*)gAppData->name);
2132
2133 #if defined(XP_WIN)
2134   printf("  --console          Start %s with a debugging console.\n",
2135          (const char*)gAppData->name);
2136 #endif
2137
2138 #if defined(XP_WIN) || defined(MOZ_WIDGET_GTK) || defined(XP_MACOSX)
2139   printf("  --headless         Run without a GUI.\n");
2140 #endif
2141
2142   // this works, but only after the components have registered.  so if you drop
2143   // in a new command line handler, --help won't not until the second run. out
2144   // of the bug, because we ship a component.reg file, it works correctly.
2145   DumpArbitraryHelp();
2146 }
2147
2148 static inline void DumpVersion() {
2149   if (gAppData->vendor && *gAppData->vendor) {
2150     printf("%s ", (const char*)gAppData->vendor);
2151   }
2152   printf("%s ", (const char*)gAppData->name);
2153
2154   // Use the displayed version
2155   // For example, for beta, we would display 42.0b2 instead of 42.0
2156   printf("%s", MOZ_STRINGIFY(MOZ_APP_VERSION_DISPLAY));
2157
2158   if (gAppData->copyright && *gAppData->copyright) {
2159     printf(", %s", (const char*)gAppData->copyright);
2160   }
2161   printf("\n");
2162 }
2163
2164 static inline void DumpFullVersion() {
2165   if (gAppData->vendor && *gAppData->vendor) {
2166     printf("%s ", (const char*)gAppData->vendor);
2167   }
2168   printf("%s ", (const char*)gAppData->name);
2169
2170   // Use the displayed version
2171   // For example, for beta, we would display 42.0b2 instead of 42.0
2172   printf("%s ", MOZ_STRINGIFY(MOZ_APP_VERSION_DISPLAY));
2173
2174   printf("%s ", (const char*)gAppData->buildID);
2175   printf("%s ", (const char*)PlatformBuildID());
2176   if (gAppData->copyright && *gAppData->copyright) {
2177     printf(", %s", (const char*)gAppData->copyright);
2178   }
2179   printf("\n");
2180 }
2181
2182 void XRE_InitOmnijar(nsIFile* greOmni, nsIFile* appOmni) {
2183   mozilla::Omnijar::Init(greOmni, appOmni);
2184 }
2185
2186 nsresult XRE_GetBinaryPath(nsIFile** aResult) {
2187   return mozilla::BinaryPath::GetFile(aResult);
2188 }
2189
2190 #ifdef XP_WIN
2191 #  include "nsWindowsRestart.cpp"
2192 #  include <shellapi.h>
2193
2194 typedef BOOL(WINAPI* SetProcessDEPPolicyFunc)(DWORD dwFlags);
2195
2196 static void RegisterApplicationRestartChanged(const char* aPref, void* aData) {
2197   DWORD cchCmdLine = 0;
2198   HRESULT rc = ::GetApplicationRestartSettings(::GetCurrentProcess(), nullptr,
2199                                                &cchCmdLine, nullptr);
2200   bool wasRegistered = false;
2201   if (rc == S_OK) {
2202     wasRegistered = true;
2203   }
2204
2205   if (Preferences::GetBool(PREF_WIN_REGISTER_APPLICATION_RESTART, false) &&
2206       !wasRegistered) {
2207     // Make the command line to use when restarting.
2208     // Excludes argv[0] because RegisterApplicationRestart adds the
2209     // executable name, replace that temporarily with -os-restarted
2210     char* exeName = gRestartArgv[0];
2211     gRestartArgv[0] = const_cast<char*>("-os-restarted");
2212     wchar_t** restartArgvConverted =
2213         AllocConvertUTF8toUTF16Strings(gRestartArgc, gRestartArgv);
2214     gRestartArgv[0] = exeName;
2215
2216     mozilla::UniquePtr<wchar_t[]> restartCommandLine;
2217     if (restartArgvConverted) {
2218       restartCommandLine =
2219           mozilla::MakeCommandLine(gRestartArgc, restartArgvConverted);
2220       FreeAllocStrings(gRestartArgc, restartArgvConverted);
2221     }
2222
2223     if (restartCommandLine) {
2224       // Flags RESTART_NO_PATCH and RESTART_NO_REBOOT are not set, so we
2225       // should be restarted if terminated by an update or restart.
2226       ::RegisterApplicationRestart(restartCommandLine.get(),
2227                                    RESTART_NO_CRASH | RESTART_NO_HANG);
2228     }
2229   } else if (wasRegistered) {
2230     ::UnregisterApplicationRestart();
2231   }
2232 }
2233
2234 static void OnAlteredPrefetchPrefChanged(const char* aPref, void* aData) {
2235   int32_t prefVal = Preferences::GetInt(PREF_WIN_ALTERED_DLL_PREFETCH, 0);
2236
2237   mozilla::DllPrefetchExperimentRegistryInfo prefetchRegInfo;
2238   mozilla::DebugOnly<mozilla::Result<Ok, nsresult>> reflectResult =
2239       prefetchRegInfo.ReflectPrefToRegistry(prefVal);
2240
2241   MOZ_ASSERT(reflectResult.value.isOk());
2242 }
2243
2244 static void SetupAlteredPrefetchPref() {
2245   mozilla::DllPrefetchExperimentRegistryInfo prefetchRegInfo;
2246
2247   mozilla::DebugOnly<mozilla::Result<Ok, nsresult>> reflectResult =
2248       prefetchRegInfo.ReflectPrefToRegistry(
2249           Preferences::GetInt(PREF_WIN_ALTERED_DLL_PREFETCH, 0));
2250   MOZ_ASSERT(reflectResult.value.isOk());
2251
2252   Preferences::RegisterCallback(&OnAlteredPrefetchPrefChanged,
2253                                 PREF_WIN_ALTERED_DLL_PREFETCH);
2254 }
2255
2256 static void ReflectSkeletonUIPrefToRegistry(const char* aPref, void* aData) {
2257   Unused << aPref;
2258   Unused << aData;
2259
2260   bool shouldBeEnabled =
2261       Preferences::GetBool(kPrefPreXulSkeletonUI, false) &&
2262       Preferences::GetBool(kPrefBrowserStartupBlankWindow, false) &&
2263       LookAndFeel::DrawInTitlebar();
2264   if (shouldBeEnabled && Preferences::HasUserValue(kPrefThemeId)) {
2265     nsCString themeId;
2266     Preferences::GetCString(kPrefThemeId, themeId);
2267     if (themeId.EqualsLiteral("default-theme@mozilla.org")) {
2268       Unused << SetPreXULSkeletonUIThemeId(ThemeMode::Default);
2269     } else if (themeId.EqualsLiteral("firefox-compact-dark@mozilla.org")) {
2270       Unused << SetPreXULSkeletonUIThemeId(ThemeMode::Dark);
2271     } else if (themeId.EqualsLiteral("firefox-compact-light@mozilla.org")) {
2272       Unused << SetPreXULSkeletonUIThemeId(ThemeMode::Light);
2273     } else {
2274       shouldBeEnabled = false;
2275     }
2276   } else if (shouldBeEnabled) {
2277     Unused << SetPreXULSkeletonUIThemeId(ThemeMode::Default);
2278   }
2279
2280   if (GetPreXULSkeletonUIEnabled() != shouldBeEnabled) {
2281     Unused << SetPreXULSkeletonUIEnabledIfAllowed(shouldBeEnabled);
2282   }
2283 }
2284
2285 static void SetupSkeletonUIPrefs() {
2286   ReflectSkeletonUIPrefToRegistry(nullptr, nullptr);
2287   Preferences::RegisterCallback(&ReflectSkeletonUIPrefToRegistry,
2288                                 kPrefPreXulSkeletonUI);
2289   Preferences::RegisterCallback(&ReflectSkeletonUIPrefToRegistry,
2290                                 kPrefBrowserStartupBlankWindow);
2291   Preferences::RegisterCallback(&ReflectSkeletonUIPrefToRegistry, kPrefThemeId);
2292   Preferences::RegisterCallback(
2293       &ReflectSkeletonUIPrefToRegistry,
2294       nsDependentCString(StaticPrefs::GetPrefName_browser_tabs_inTitlebar()));
2295 }
2296
2297 #  if defined(MOZ_LAUNCHER_PROCESS)
2298
2299 static void OnLauncherPrefChanged(const char* aPref, void* aData) {
2300   bool prefVal = Preferences::GetBool(PREF_WIN_LAUNCHER_PROCESS_ENABLED, true);
2301
2302   mozilla::LauncherRegistryInfo launcherRegInfo;
2303   mozilla::DebugOnly<mozilla::LauncherVoidResult> reflectResult =
2304       launcherRegInfo.ReflectPrefToRegistry(prefVal);
2305   MOZ_ASSERT(reflectResult.inspect().isOk());
2306 }
2307
2308 static void OnLauncherTelemetryPrefChanged(const char* aPref, void* aData) {
2309   bool prefVal = Preferences::GetBool(kPrefHealthReportUploadEnabled, true);
2310
2311   mozilla::LauncherRegistryInfo launcherRegInfo;
2312   mozilla::DebugOnly<mozilla::LauncherVoidResult> reflectResult =
2313       launcherRegInfo.ReflectTelemetryPrefToRegistry(prefVal);
2314   MOZ_ASSERT(reflectResult.inspect().isOk());
2315 }
2316
2317 static void SetupLauncherProcessPref() {
2318   if (gLauncherProcessState) {
2319     // We've already successfully run
2320     return;
2321   }
2322
2323   mozilla::LauncherRegistryInfo launcherRegInfo;
2324
2325   mozilla::LauncherResult<mozilla::LauncherRegistryInfo::EnabledState>
2326       enabledState = launcherRegInfo.IsEnabled();
2327
2328   if (enabledState.isOk()) {
2329     gLauncherProcessState = Some(enabledState.unwrap());
2330
2331     CrashReporter::RecordAnnotationU32(
2332         CrashReporter::Annotation::LauncherProcessState,
2333         static_cast<uint32_t>(enabledState.unwrap()));
2334
2335     // Reflect the launcher process registry state into user prefs
2336     Preferences::SetBool(
2337         PREF_WIN_LAUNCHER_PROCESS_ENABLED,
2338         enabledState.unwrap() !=
2339             mozilla::LauncherRegistryInfo::EnabledState::ForceDisabled);
2340   }
2341
2342   mozilla::DebugOnly<mozilla::LauncherVoidResult> reflectResult =
2343       launcherRegInfo.ReflectTelemetryPrefToRegistry(
2344           Preferences::GetBool(kPrefHealthReportUploadEnabled, true));
2345   MOZ_ASSERT(reflectResult.inspect().isOk());
2346
2347   Preferences::RegisterCallback(&OnLauncherPrefChanged,
2348                                 PREF_WIN_LAUNCHER_PROCESS_ENABLED);
2349   Preferences::RegisterCallback(&OnLauncherTelemetryPrefChanged,
2350                                 kPrefHealthReportUploadEnabled);
2351 }
2352
2353 #  endif  // defined(MOZ_LAUNCHER_PROCESS)
2354
2355 #  if defined(MOZ_DEFAULT_BROWSER_AGENT)
2356
2357 #    define DEFAULT_BROWSER_AGENT_KEY_NAME \
2358       "SOFTWARE\\" MOZ_APP_VENDOR "\\" MOZ_APP_NAME "\\Default Browser Agent"
2359
2360 static nsresult PrependRegistryValueName(nsAutoString& aValueName) {
2361   nsresult rv;
2362
2363   nsCOMPtr<nsIFile> binaryPath;
2364   rv = XRE_GetBinaryPath(getter_AddRefs(binaryPath));
2365   NS_ENSURE_SUCCESS(rv, rv);
2366
2367   nsCOMPtr<nsIFile> binaryDir;
2368   rv = binaryPath->GetParent(getter_AddRefs(binaryDir));
2369   NS_ENSURE_SUCCESS(rv, rv);
2370
2371   nsAutoString prefix;
2372   rv = binaryDir->GetPath(prefix);
2373   NS_ENSURE_SUCCESS(rv, rv);
2374
2375   prefix.AppendLiteral("|");
2376   aValueName.Insert(prefix, 0);
2377
2378   return NS_OK;
2379 }
2380
2381 static void OnDefaultAgentTelemetryPrefChanged(const char* aPref, void* aData) {
2382   nsresult rv;
2383   nsAutoString valueName;
2384   if (strcmp(aPref, kPrefHealthReportUploadEnabled) == 0) {
2385     valueName.AssignLiteral("DisableTelemetry");
2386   } else if (strcmp(aPref, kPrefDefaultAgentEnabled) == 0) {
2387     valueName.AssignLiteral("DisableDefaultBrowserAgent");
2388   } else {
2389     return;
2390   }
2391   rv = PrependRegistryValueName(valueName);
2392   NS_ENSURE_SUCCESS_VOID(rv);
2393
2394   nsCOMPtr<nsIWindowsRegKey> regKey =
2395       do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
2396   NS_ENSURE_SUCCESS_VOID(rv);
2397
2398   nsAutoString keyName;
2399   keyName.AppendLiteral(DEFAULT_BROWSER_AGENT_KEY_NAME);
2400   rv = regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, keyName,
2401                       nsIWindowsRegKey::ACCESS_WRITE);
2402
2403   bool prefVal = Preferences::GetBool(aPref, true);
2404
2405   // We're recording whether the pref is *disabled*, so invert the value.
2406   rv = regKey->WriteIntValue(valueName, prefVal ? 0 : 1);
2407   NS_ENSURE_SUCCESS_VOID(rv);
2408 }
2409
2410 static void OnSetDefaultBrowserUserChoicePrefChanged(const char* aPref,
2411                                                      void* aData) {
2412   nsresult rv;
2413   if (strcmp(aPref, kPrefSetDefaultBrowserUserChoicePref) != 0) {
2414     return;
2415   }
2416   nsAutoString valueName;
2417   valueName.AssignLiteral("SetDefaultBrowserUserChoice");
2418   rv = PrependRegistryValueName(valueName);
2419   NS_ENSURE_SUCCESS_VOID(rv);
2420
2421   nsCOMPtr<nsIWindowsRegKey> regKey =
2422       do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
2423   NS_ENSURE_SUCCESS_VOID(rv);
2424
2425   nsAutoString keyName;
2426   keyName.AppendLiteral(DEFAULT_BROWSER_AGENT_KEY_NAME);
2427   rv = regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, keyName,
2428                       nsIWindowsRegKey::ACCESS_WRITE);
2429
2430   bool prefVal = Preferences::GetBool(aPref, true);
2431
2432   rv = regKey->WriteIntValue(valueName, prefVal);
2433   NS_ENSURE_SUCCESS_VOID(rv);
2434 }
2435
2436 static void OnDefaultAgentRemoteSettingsPrefChanged(const char* aPref,
2437                                                     void* aData) {
2438   nsresult rv;
2439   nsAutoString valueName;
2440   if (strcmp(aPref, kPrefServicesSettingsServer) == 0) {
2441     valueName.AssignLiteral("ServicesSettingsServer");
2442   } else {
2443     return;
2444   }
2445   rv = PrependRegistryValueName(valueName);
2446   NS_ENSURE_SUCCESS_VOID(rv);
2447
2448   nsCOMPtr<nsIWindowsRegKey> regKey =
2449       do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
2450   NS_ENSURE_SUCCESS_VOID(rv);
2451
2452   nsAutoString keyName;
2453   keyName.AppendLiteral(DEFAULT_BROWSER_AGENT_KEY_NAME);
2454   rv = regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, keyName,
2455                       nsIWindowsRegKey::ACCESS_WRITE);
2456
2457   NS_ENSURE_SUCCESS_VOID(rv);
2458
2459   nsAutoString prefVal;
2460   rv = Preferences::GetString(aPref, prefVal);
2461   if (NS_FAILED(rv)) {
2462     return;
2463   }
2464
2465   if (prefVal.IsEmpty()) {
2466     rv = regKey->RemoveValue(valueName);
2467   } else {
2468     rv = regKey->WriteStringValue(valueName, prefVal);
2469   }
2470   NS_ENSURE_SUCCESS_VOID(rv);
2471 }
2472
2473 static void SetDefaultAgentLastRunTime() {
2474   nsresult rv;
2475   nsAutoString valueName;
2476   valueName.AppendLiteral("AppLastRunTime");
2477   rv = PrependRegistryValueName(valueName);
2478   NS_ENSURE_SUCCESS_VOID(rv);
2479
2480   nsCOMPtr<nsIWindowsRegKey> regKey =
2481       do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
2482   NS_ENSURE_SUCCESS_VOID(rv);
2483
2484   nsAutoString keyName;
2485   keyName.AppendLiteral(DEFAULT_BROWSER_AGENT_KEY_NAME);
2486   rv = regKey->Create(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, keyName,
2487                       nsIWindowsRegKey::ACCESS_WRITE);
2488   NS_ENSURE_SUCCESS_VOID(rv);
2489
2490   FILETIME fileTime;
2491   GetSystemTimeAsFileTime(&fileTime);
2492
2493   ULARGE_INTEGER integerTime;
2494   integerTime.u.LowPart = fileTime.dwLowDateTime;
2495   integerTime.u.HighPart = fileTime.dwHighDateTime;
2496
2497   rv = regKey->WriteInt64Value(valueName, integerTime.QuadPart);
2498   NS_ENSURE_SUCCESS_VOID(rv);
2499 }
2500
2501 #  endif  // defined(MOZ_DEFAULT_BROWSER_AGENT)
2502
2503 #endif  // XP_WIN
2504
2505 void UnlockProfile() {
2506   if (gProfileLock) {
2507     gProfileLock->Unlock();
2508   }
2509 }
2510
2511 nsresult LaunchChild(bool aBlankCommandLine, bool aTryExec) {
2512   // Restart this process by exec'ing it into the current process
2513   // if supported by the platform.  Otherwise, use NSPR.
2514
2515 #ifdef MOZ_JPROF
2516   // make sure JPROF doesn't think we're E10s
2517   unsetenv("JPROF_ISCHILD");
2518 #endif
2519
2520   if (aBlankCommandLine) {
2521     gRestartArgc = 1;
2522     gRestartArgv[gRestartArgc] = nullptr;
2523   }
2524
2525 #if defined(MOZ_HAS_REMOTE)
2526   if (gRestartWithoutRemote) {
2527     SaveToEnv("MOZ_NO_REMOTE=1");
2528   }
2529 #endif
2530
2531   SaveToEnv("MOZ_LAUNCHED_CHILD=1");
2532 #if defined(MOZ_LAUNCHER_PROCESS)
2533   SaveToEnv("MOZ_LAUNCHER_PROCESS=1");
2534 #endif  // defined(MOZ_LAUNCHER_PROCESS)
2535
2536 #if !defined(MOZ_WIDGET_ANDROID)  // Android has separate restart code.
2537 #  if defined(XP_MACOSX)
2538   InitializeMacApp();
2539   CommandLineServiceMac::SetupMacCommandLine(gRestartArgc, gRestartArgv, true);
2540   LaunchChildMac(gRestartArgc, gRestartArgv);
2541 #  else
2542   nsCOMPtr<nsIFile> lf;
2543   nsresult rv = XRE_GetBinaryPath(getter_AddRefs(lf));
2544   if (NS_FAILED(rv)) return rv;
2545
2546 #    if defined(XP_WIN)
2547   nsAutoString exePath;
2548   rv = lf->GetPath(exePath);
2549   if (NS_FAILED(rv)) return rv;
2550
2551   HANDLE hProcess;
2552   if (!WinLaunchChild(exePath.get(), gRestartArgc, gRestartArgv, nullptr,
2553                       &hProcess))
2554     return NS_ERROR_FAILURE;
2555   // Keep the current process around until the restarted process has created
2556   // its message queue, to avoid the launched process's windows being forced
2557   // into the background.
2558   mozilla::WaitForInputIdle(hProcess);
2559   ::CloseHandle(hProcess);
2560
2561 #    else
2562   nsAutoCString exePath;
2563   rv = lf->GetNativePath(exePath);
2564   if (NS_FAILED(rv)) return rv;
2565
2566 #      if defined(XP_UNIX)
2567   if (aTryExec) {
2568     execv(exePath.get(), gRestartArgv);
2569
2570     // If execv returns we know it's because it failed.
2571     return NS_ERROR_FAILURE;
2572   }
2573 #      endif
2574   if (PR_CreateProcessDetached(exePath.get(), gRestartArgv, nullptr, nullptr) ==
2575       PR_FAILURE) {
2576     return NS_ERROR_FAILURE;
2577   }
2578
2579   // Note that we don't know if the child process starts okay, if it
2580   // immediately returns non-zero then we may mask that by returning a zero
2581   // exit status.
2582
2583 #    endif  // WP_WIN
2584 #  endif    // WP_MACOSX
2585 #endif      // MOZ_WIDGET_ANDROID
2586
2587   return NS_ERROR_LAUNCHED_CHILD_PROCESS;
2588 }
2589
2590 static const char kProfileProperties[] =
2591     "chrome://mozapps/locale/profile/profileSelection.properties";
2592
2593 namespace {
2594
2595 /**
2596  * This class, instead of a raw nsresult, should be the return type of any
2597  * function called by SelectProfile that initializes XPCOM.
2598  */
2599 class ReturnAbortOnError {
2600  public:
2601   MOZ_IMPLICIT ReturnAbortOnError(nsresult aRv) { mRv = ConvertRv(aRv); }
2602
2603   operator nsresult() { return mRv; }
2604
2605  private:
2606   inline nsresult ConvertRv(nsresult aRv) {
2607     if (NS_SUCCEEDED(aRv) || aRv == NS_ERROR_LAUNCHED_CHILD_PROCESS) {
2608       return aRv;
2609     }
2610 #ifdef MOZ_BACKGROUNDTASKS
2611     // A background task that fails to lock its profile will return
2612     // NS_ERROR_UNEXPECTED and this will allow the task to exit with a
2613     // non-zero exit code.
2614     if (aRv == NS_ERROR_UNEXPECTED && BackgroundTasks::IsBackgroundTaskMode()) {
2615       return aRv;
2616     }
2617 #endif
2618     return NS_ERROR_ABORT;
2619   }
2620
2621   nsresult mRv;
2622 };
2623
2624 }  // namespace
2625
2626 static nsresult ProfileMissingDialog(nsINativeAppSupport* aNative) {
2627 #ifdef MOZ_WIDGET_ANDROID
2628   // We cannot really do anything this early during initialization, so we just
2629   // return as this is likely the effect of misconfiguration on the test side.
2630   // Non-test code paths cannot set the profile folder, which is always the
2631   // default one.
2632   Output(true, "Could not find profile folder.\n");
2633   return NS_ERROR_ABORT;
2634 #else
2635 #  ifdef MOZ_BACKGROUNDTASKS
2636   if (BackgroundTasks::IsBackgroundTaskMode()) {
2637     // We should never get to this point in background task mode.
2638     Output(false,
2639            "Could not determine any profile running in backgroundtask mode!\n");
2640     return NS_ERROR_ABORT;
2641   }
2642 #  endif  // MOZ_BACKGROUNDTASKS
2643
2644   nsresult rv;
2645
2646   ScopedXPCOMStartup xpcom;
2647   rv = xpcom.Initialize();
2648   NS_ENSURE_SUCCESS(rv, rv);
2649
2650   rv = xpcom.SetWindowCreator(aNative);
2651   NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
2652
2653   {  // extra scoping is needed so we release these components before xpcom
2654      // shutdown
2655     nsCOMPtr<nsIStringBundleService> sbs =
2656         mozilla::components::StringBundle::Service();
2657     NS_ENSURE_TRUE(sbs, NS_ERROR_FAILURE);
2658
2659     nsCOMPtr<nsIStringBundle> sb;
2660     sbs->CreateBundle(kProfileProperties, getter_AddRefs(sb));
2661     NS_ENSURE_TRUE_LOG(sbs, NS_ERROR_FAILURE);
2662
2663     NS_ConvertUTF8toUTF16 appName(gAppData->name);
2664     AutoTArray<nsString, 2> params = {appName, appName};
2665
2666     // profileMissing
2667     nsAutoString missingMessage;
2668     rv = sb->FormatStringFromName("profileMissing", params, missingMessage);
2669     NS_ENSURE_SUCCESS(rv, NS_ERROR_ABORT);
2670
2671     nsAutoString missingTitle;
2672     params.SetLength(1);
2673     rv = sb->FormatStringFromName("profileMissingTitle", params, missingTitle);
2674     NS_ENSURE_SUCCESS(rv, NS_ERROR_ABORT);
2675
2676     nsCOMPtr<nsIPromptService> ps(do_GetService(NS_PROMPTSERVICE_CONTRACTID));
2677     NS_ENSURE_TRUE(ps, NS_ERROR_FAILURE);
2678
2679     ps->Alert(nullptr, missingTitle.get(), missingMessage.get());
2680
2681     return NS_ERROR_ABORT;
2682   }
2683 #endif    // MOZ_WIDGET_ANDROID
2684 }
2685
2686 static ReturnAbortOnError ProfileLockedDialog(nsIFile* aProfileDir,
2687                                               nsIFile* aProfileLocalDir,
2688                                               nsIProfileUnlocker* aUnlocker,
2689                                               nsINativeAppSupport* aNative,
2690                                               nsIProfileLock** aResult) {
2691   nsresult rv;
2692
2693   bool exists;
2694   aProfileDir->Exists(&exists);
2695   if (!exists) {
2696     return ProfileMissingDialog(aNative);
2697   }
2698
2699   ScopedXPCOMStartup xpcom;
2700   rv = xpcom.Initialize();
2701   NS_ENSURE_SUCCESS(rv, rv);
2702
2703 #if defined(MOZ_TELEMETRY_REPORTING)
2704   // We cannot check if telemetry has been disabled by the user, yet.
2705   // So, rely on the build time settings, instead.
2706   mozilla::Telemetry::WriteFailedProfileLock(aProfileDir);
2707 #endif
2708
2709   rv = xpcom.SetWindowCreator(aNative);
2710   NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
2711
2712   {  // extra scoping is needed so we release these components before xpcom
2713      // shutdown
2714     nsCOMPtr<nsIStringBundleService> sbs =
2715         mozilla::components::StringBundle::Service();
2716     NS_ENSURE_TRUE(sbs, NS_ERROR_FAILURE);
2717
2718     nsCOMPtr<nsIStringBundle> sb;
2719     sbs->CreateBundle(kProfileProperties, getter_AddRefs(sb));
2720     NS_ENSURE_TRUE_LOG(sbs, NS_ERROR_FAILURE);
2721
2722     NS_ConvertUTF8toUTF16 appName(gAppData->name);
2723     AutoTArray<nsString, 3> params = {appName, appName, appName};
2724
2725     nsAutoString killMessage;
2726 #ifndef XP_MACOSX
2727     rv = sb->FormatStringFromName(
2728         aUnlocker ? "restartMessageUnlocker" : "restartMessageNoUnlocker2",
2729         params, killMessage);
2730 #else
2731     rv = sb->FormatStringFromName(
2732         aUnlocker ? "restartMessageUnlockerMac" : "restartMessageNoUnlockerMac",
2733         params, killMessage);
2734 #endif
2735     NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
2736
2737     params.SetLength(1);
2738     nsAutoString killTitle;
2739     rv = sb->FormatStringFromName("restartTitle", params, killTitle);
2740     NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
2741
2742 #ifdef MOZ_BACKGROUNDTASKS
2743     if (BackgroundTasks::IsBackgroundTaskMode()) {
2744       // This error is handled specially to exit with a non-zero exit code.
2745       printf_stderr("%s\n", NS_LossyConvertUTF16toASCII(killMessage).get());
2746       return NS_ERROR_UNEXPECTED;
2747     }
2748 #endif
2749
2750     if (gfxPlatform::IsHeadless()) {
2751       // TODO: make a way to turn off all dialogs when headless.
2752       Output(true, "%s\n", NS_LossyConvertUTF16toASCII(killMessage).get());
2753       return NS_ERROR_FAILURE;
2754     }
2755
2756     nsCOMPtr<nsIPromptService> ps(do_GetService(NS_PROMPTSERVICE_CONTRACTID));
2757     NS_ENSURE_TRUE(ps, NS_ERROR_FAILURE);
2758
2759     if (aUnlocker) {
2760       int32_t button;
2761 #ifdef MOZ_WIDGET_ANDROID
2762       // On Android we always kill the process if the lock is still being held
2763       button = 0;
2764 #else
2765       const uint32_t flags = (nsIPromptService::BUTTON_TITLE_IS_STRING *
2766                               nsIPromptService::BUTTON_POS_0) +
2767                              (nsIPromptService::BUTTON_TITLE_CANCEL *
2768                               nsIPromptService::BUTTON_POS_1);
2769
2770       bool checkState = false;
2771       rv = ps->ConfirmEx(nullptr, killTitle.get(), killMessage.get(), flags,
2772                          killTitle.get(), nullptr, nullptr, nullptr,
2773                          &checkState, &button);
2774       NS_ENSURE_SUCCESS_LOG(rv, rv);
2775 #endif
2776
2777       if (button == 0) {
2778         rv = aUnlocker->Unlock(nsIProfileUnlocker::FORCE_QUIT);
2779         if (NS_FAILED(rv)) {
2780           return rv;
2781         }
2782
2783         SaveFileToEnv("XRE_PROFILE_PATH", aProfileDir);
2784         SaveFileToEnv("XRE_PROFILE_LOCAL_PATH", aProfileLocalDir);
2785
2786 #if defined(MOZ_HAS_REMOTE)
2787         if (gRemoteService) {
2788           gRemoteService->UnlockStartup();
2789           gRemoteService = nullptr;
2790         }
2791 #endif
2792         return LaunchChild(false, true);
2793       }
2794     } else {
2795       rv = ps->Alert(nullptr, killTitle.get(), killMessage.get());
2796       NS_ENSURE_SUCCESS_LOG(rv, rv);
2797     }
2798
2799     return NS_ERROR_ABORT;
2800   }
2801 }
2802
2803 static const char kProfileManagerURL[] =
2804     "chrome://mozapps/content/profile/profileSelection.xhtml";
2805
2806 static ReturnAbortOnError ShowProfileManager(
2807     nsIToolkitProfileService* aProfileSvc, nsINativeAppSupport* aNative) {
2808   nsresult rv;
2809
2810   nsCOMPtr<nsIFile> profD, profLD;
2811   bool offline = false;
2812   int32_t dialogReturn;
2813
2814   {
2815     ScopedXPCOMStartup xpcom;
2816     rv = xpcom.Initialize();
2817     NS_ENSURE_SUCCESS(rv, rv);
2818
2819     rv = xpcom.SetWindowCreator(aNative);
2820     NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
2821
2822 #ifdef XP_MACOSX
2823     InitializeMacApp();
2824     CommandLineServiceMac::SetupMacCommandLine(gRestartArgc, gRestartArgv,
2825                                                true);
2826 #endif
2827
2828     {  // extra scoping is needed so we release these components before xpcom
2829        // shutdown
2830       nsCOMPtr<nsIWindowWatcher> windowWatcher(
2831           do_GetService(NS_WINDOWWATCHER_CONTRACTID));
2832       nsCOMPtr<nsIDialogParamBlock> ioParamBlock(
2833           do_CreateInstance(NS_DIALOGPARAMBLOCK_CONTRACTID));
2834       nsCOMPtr<nsIMutableArray> dlgArray(
2835           do_CreateInstance(NS_ARRAY_CONTRACTID));
2836       NS_ENSURE_TRUE(windowWatcher && ioParamBlock && dlgArray,
2837                      NS_ERROR_FAILURE);
2838
2839       ioParamBlock->SetObjects(dlgArray);
2840
2841       nsCOMPtr<nsIAppStartup> appStartup(components::AppStartup::Service());
2842       NS_ENSURE_TRUE(appStartup, NS_ERROR_FAILURE);
2843
2844       nsAutoCString features("centerscreen,chrome,modal,titlebar");
2845       // If we're launching a private browsing window make sure to set that
2846       // feature for the Profile Manager window as well, so it groups correctly
2847       // on the Windows taskbar.
2848       if (CheckArgExists("private-window") == ARG_FOUND) {
2849         features.AppendLiteral(",private");
2850       }
2851       nsCOMPtr<mozIDOMWindowProxy> newWindow;
2852       rv = windowWatcher->OpenWindow(
2853           nullptr, nsDependentCString(kProfileManagerURL), "_blank"_ns,
2854           features, ioParamBlock, getter_AddRefs(newWindow));
2855
2856       NS_ENSURE_SUCCESS_LOG(rv, rv);
2857
2858       rv = ioParamBlock->GetInt(0, &dialogReturn);
2859       if (NS_FAILED(rv) || dialogReturn == nsIToolkitProfileService::exit) {
2860         return NS_ERROR_ABORT;
2861       }
2862
2863       int32_t startOffline;
2864       rv = ioParamBlock->GetInt(1, &startOffline);
2865       offline = NS_SUCCEEDED(rv) && startOffline == 1;
2866
2867       rv = dlgArray->QueryElementAt(0, NS_GET_IID(nsIFile),
2868                                     getter_AddRefs(profD));
2869       NS_ENSURE_SUCCESS_LOG(rv, rv);
2870
2871       rv = dlgArray->QueryElementAt(1, NS_GET_IID(nsIFile),
2872                                     getter_AddRefs(profLD));
2873       NS_ENSURE_SUCCESS_LOG(rv, rv);
2874     }
2875   }
2876
2877   if (offline) {
2878     SaveToEnv("XRE_START_OFFLINE=1");
2879   }
2880
2881   // User requested that we restart back into the profile manager.
2882   if (dialogReturn == nsIToolkitProfileService::restart) {
2883     SaveToEnv("XRE_RESTART_TO_PROFILE_MANAGER=1");
2884     SaveToEnv("XRE_RESTARTED_BY_PROFILE_MANAGER=1");
2885   } else {
2886     MOZ_ASSERT(dialogReturn == nsIToolkitProfileService::launchWithProfile);
2887     SaveFileToEnv("XRE_PROFILE_PATH", profD);
2888     SaveFileToEnv("XRE_PROFILE_LOCAL_PATH", profLD);
2889     SaveToEnv("XRE_RESTARTED_BY_PROFILE_MANAGER=1");
2890   }
2891
2892   if (gRestartedByOS) {
2893     // Re-add this argument when actually starting the application.
2894     char** newArgv =
2895         (char**)realloc(gRestartArgv, sizeof(char*) * (gRestartArgc + 2));
2896     NS_ENSURE_TRUE(newArgv, NS_ERROR_OUT_OF_MEMORY);
2897     gRestartArgv = newArgv;
2898     gRestartArgv[gRestartArgc++] = const_cast<char*>("-os-restarted");
2899     gRestartArgv[gRestartArgc] = nullptr;
2900   }
2901 #if defined(MOZ_HAS_REMOTE)
2902   if (gRemoteService) {
2903     gRemoteService->UnlockStartup();
2904     gRemoteService = nullptr;
2905   }
2906 #endif
2907   return LaunchChild(false, true);
2908 }
2909
2910 static bool gDoMigration = false;
2911 static bool gDoProfileReset = false;
2912 static nsCOMPtr<nsIToolkitProfile> gResetOldProfile;
2913
2914 static nsresult LockProfile(nsINativeAppSupport* aNative, nsIFile* aRootDir,
2915                             nsIFile* aLocalDir, nsIToolkitProfile* aProfile,
2916                             nsIProfileLock** aResult) {
2917   // If you close Firefox and very quickly reopen it, the old Firefox may
2918   // still be closing down. Rather than immediately showing the
2919   // "Firefox is running but is not responding" message, we spend a few
2920   // seconds retrying first.
2921
2922   static const int kLockRetrySeconds = 5;
2923   static const int kLockRetrySleepMS = 100;
2924
2925   nsresult rv;
2926   nsCOMPtr<nsIProfileUnlocker> unlocker;
2927   const TimeStamp start = TimeStamp::Now();
2928   do {
2929     if (aProfile) {
2930       rv = aProfile->Lock(getter_AddRefs(unlocker), aResult);
2931     } else {
2932       rv = NS_LockProfilePath(aRootDir, aLocalDir, getter_AddRefs(unlocker),
2933                               aResult);
2934     }
2935     if (NS_SUCCEEDED(rv)) {
2936       StartupTimeline::Record(StartupTimeline::AFTER_PROFILE_LOCKED);
2937       return NS_OK;
2938     }
2939     PR_Sleep(kLockRetrySleepMS);
2940   } while (TimeStamp::Now() - start <
2941            TimeDuration::FromSeconds(kLockRetrySeconds));
2942
2943   return ProfileLockedDialog(aRootDir, aLocalDir, unlocker, aNative, aResult);
2944 }
2945
2946 // Pick a profile. We need to end up with a profile root dir, local dir and
2947 // potentially an nsIToolkitProfile instance.
2948 //
2949 // 1) check for --profile <path>
2950 // 2) check for -P <name>
2951 // 3) check for --ProfileManager
2952 // 4) use the default profile, if there is one
2953 // 5) if there are *no* profiles, set up profile-migration
2954 // 6) display the profile-manager UI
2955 static nsresult SelectProfile(nsToolkitProfileService* aProfileSvc,
2956                               nsINativeAppSupport* aNative, nsIFile** aRootDir,
2957                               nsIFile** aLocalDir, nsIToolkitProfile** aProfile,
2958                               bool* aWasDefaultSelection) {
2959   StartupTimeline::Record(StartupTimeline::SELECT_PROFILE);
2960
2961   nsresult rv;
2962
2963   if (EnvHasValue("MOZ_RESET_PROFILE_RESTART")) {
2964     gDoProfileReset = true;
2965     gDoMigration = true;
2966   }
2967
2968   // reset-profile and migration args need to be checked before any profiles are
2969   // chosen below.
2970   ArgResult ar = CheckArg("reset-profile");
2971   if (ar == ARG_FOUND) {
2972     gDoProfileReset = true;
2973   }
2974
2975   ar = CheckArg("migration");
2976   if (ar == ARG_FOUND) {
2977     gDoMigration = true;
2978   }
2979
2980 #if defined(XP_WIN)
2981   // This arg is only used to indicate to telemetry that a profile refresh
2982   // (reset+migration) was requested from the uninstaller, pass this along
2983   // via an environment variable for simplicity.
2984   ar = CheckArg("uninstaller-profile-refresh");
2985   if (ar == ARG_FOUND) {
2986     SaveToEnv("MOZ_UNINSTALLER_PROFILE_REFRESH=1");
2987   }
2988 #endif
2989
2990   if (EnvHasValue("XRE_RESTART_TO_PROFILE_MANAGER")) {
2991     return ShowProfileManager(aProfileSvc, aNative);
2992   }
2993
2994   // Ask the profile manager to select the profile directories to use.
2995   bool didCreate = false;
2996   rv = aProfileSvc->SelectStartupProfile(&gArgc, gArgv, gDoProfileReset,
2997                                          aRootDir, aLocalDir, aProfile,
2998                                          &didCreate, aWasDefaultSelection);
2999
3000   if (rv == NS_ERROR_SHOW_PROFILE_MANAGER) {
3001     return ShowProfileManager(aProfileSvc, aNative);
3002   }
3003
3004   NS_ENSURE_SUCCESS(rv, rv);
3005
3006   if (didCreate) {
3007     // For a fresh install, we would like to let users decide
3008     // to do profile migration on their own later after using.
3009     gDoProfileReset = false;
3010     gDoMigration = false;
3011   }
3012
3013   if (gDoProfileReset && !*aProfile) {
3014     NS_WARNING("Profile reset is only supported for named profiles.");
3015     return NS_ERROR_ABORT;
3016   }
3017
3018   // No profile could be found. This generally shouldn't happen, a new profile
3019   // should be created in all cases except for profile reset which is covered
3020   // above, but just in case...
3021   if (!*aRootDir) {
3022     NS_WARNING("Failed to select or create profile.");
3023     return NS_ERROR_ABORT;
3024   }
3025
3026   return NS_OK;
3027 }
3028
3029 #ifdef MOZ_BLOCK_PROFILE_DOWNGRADE
3030 struct FileWriteFunc final : public JSONWriteFunc {
3031   FILE* mFile;
3032   explicit FileWriteFunc(FILE* aFile) : mFile(aFile) {}
3033
3034   void Write(const Span<const char>& aStr) final {
3035     fprintf(mFile, "%.*s", int(aStr.size()), aStr.data());
3036   }
3037 };
3038
3039 static void SubmitDowngradeTelemetry(const nsCString& aLastVersion,
3040                                      bool aHasSync, int32_t aButton) {
3041   nsCOMPtr<nsIPrefService> prefSvc =
3042       do_GetService("@mozilla.org/preferences-service;1");
3043   NS_ENSURE_TRUE_VOID(prefSvc);
3044
3045   nsCOMPtr<nsIPrefBranch> prefBranch = do_QueryInterface(prefSvc);
3046   NS_ENSURE_TRUE_VOID(prefBranch);
3047
3048   bool enabled;
3049   nsresult rv =
3050       prefBranch->GetBoolPref(kPrefHealthReportUploadEnabled, &enabled);
3051   NS_ENSURE_SUCCESS_VOID(rv);
3052   if (!enabled) {
3053     return;
3054   }
3055
3056   nsCString server;
3057   rv = prefBranch->GetCharPref("toolkit.telemetry.server", server);
3058   NS_ENSURE_SUCCESS_VOID(rv);
3059
3060   nsCString clientId;
3061   rv = prefBranch->GetCharPref("toolkit.telemetry.cachedClientID", clientId);
3062   NS_ENSURE_SUCCESS_VOID(rv);
3063
3064   rv = prefSvc->GetDefaultBranch(nullptr, getter_AddRefs(prefBranch));
3065   NS_ENSURE_SUCCESS_VOID(rv);
3066
3067   nsCString channel("default");
3068   rv = prefBranch->GetCharPref("app.update.channel", channel);
3069   NS_ENSURE_SUCCESS_VOID(rv);
3070
3071   nsID uuid;
3072   rv = nsID::GenerateUUIDInPlace(uuid);
3073   NS_ENSURE_SUCCESS_VOID(rv);
3074
3075   nsCString arch("null");
3076   nsCOMPtr<nsIPropertyBag2> sysInfo =
3077       do_GetService("@mozilla.org/system-info;1");
3078   NS_ENSURE_TRUE_VOID(sysInfo);
3079   sysInfo->GetPropertyAsACString(u"arch"_ns, arch);
3080
3081   time_t now;
3082   time(&now);
3083   char date[sizeof "YYYY-MM-DDThh:mm:ss.000Z"];
3084   strftime(date, sizeof date, "%FT%T.000Z", gmtime(&now));
3085
3086   NSID_TrimBracketsASCII pingId(uuid);
3087   constexpr auto pingType = "downgrade"_ns;
3088
3089   int32_t pos = aLastVersion.Find("_");
3090   if (pos == kNotFound) {
3091     return;
3092   }
3093
3094   const nsDependentCSubstring lastVersion = Substring(aLastVersion, 0, pos);
3095   const nsDependentCSubstring lastBuildId =
3096       Substring(aLastVersion, pos + 1, 14);
3097
3098   nsPrintfCString url("%s/submit/telemetry/%s/%s/%s/%s/%s/%s?v=%d",
3099                       server.get(), PromiseFlatCString(pingId).get(),
3100                       pingType.get(), (const char*)gAppData->name,
3101                       (const char*)gAppData->version, channel.get(),
3102                       (const char*)gAppData->buildID,
3103                       TELEMETRY_PING_FORMAT_VERSION);
3104
3105   nsCOMPtr<nsIFile> pingFile;
3106   rv = NS_GetSpecialDirectory(XRE_USER_APP_DATA_DIR, getter_AddRefs(pingFile));
3107   NS_ENSURE_SUCCESS_VOID(rv);
3108   rv = pingFile->Append(u"Pending Pings"_ns);
3109   NS_ENSURE_SUCCESS_VOID(rv);
3110   rv = pingFile->Create(nsIFile::DIRECTORY_TYPE, 0755);
3111   if (NS_FAILED(rv) && rv != NS_ERROR_FILE_ALREADY_EXISTS) {
3112     return;
3113   }
3114   rv = pingFile->Append(NS_ConvertUTF8toUTF16(pingId));
3115   NS_ENSURE_SUCCESS_VOID(rv);
3116
3117   nsCOMPtr<nsIFile> pingSender;
3118   rv = NS_GetSpecialDirectory(NS_GRE_BIN_DIR, getter_AddRefs(pingSender));
3119   NS_ENSURE_SUCCESS_VOID(rv);
3120 #  ifdef XP_WIN
3121   pingSender->Append(u"pingsender.exe"_ns);
3122 #  else
3123   pingSender->Append(u"pingsender"_ns);
3124 #  endif
3125
3126   bool exists;
3127   rv = pingSender->Exists(&exists);
3128   NS_ENSURE_SUCCESS_VOID(rv);
3129   if (!exists) {
3130     return;
3131   }
3132
3133   FILE* file;
3134   rv = pingFile->OpenANSIFileDesc("w", &file);
3135   NS_ENSURE_SUCCESS_VOID(rv);
3136
3137   JSONWriter w(MakeUnique<FileWriteFunc>(file));
3138   w.Start();
3139   {
3140     w.StringProperty("type",
3141                      Span<const char>(pingType.Data(), pingType.Length()));
3142     w.StringProperty("id", PromiseFlatCString(pingId));
3143     w.StringProperty("creationDate", MakeStringSpan(date));
3144     w.IntProperty("version", TELEMETRY_PING_FORMAT_VERSION);
3145     w.StringProperty("clientId", clientId);
3146     w.StartObjectProperty("application");
3147     {
3148       w.StringProperty("architecture", arch);
3149       w.StringProperty(
3150           "buildId",
3151           MakeStringSpan(static_cast<const char*>(gAppData->buildID)));
3152       w.StringProperty(
3153           "name", MakeStringSpan(static_cast<const char*>(gAppData->name)));
3154       w.StringProperty(
3155           "version",
3156           MakeStringSpan(static_cast<const char*>(gAppData->version)));
3157       w.StringProperty("displayVersion",
3158                        MOZ_STRINGIFY(MOZ_APP_VERSION_DISPLAY));
3159       w.StringProperty(
3160           "vendor", MakeStringSpan(static_cast<const char*>(gAppData->vendor)));
3161       w.StringProperty("platformVersion", gToolkitVersion);
3162 #  ifdef TARGET_XPCOM_ABI
3163       w.StringProperty("xpcomAbi", TARGET_XPCOM_ABI);
3164 #  else
3165       w.StringProperty("xpcomAbi", "unknown");
3166 #  endif
3167       w.StringProperty("channel", channel);
3168     }
3169     w.EndObject();
3170     w.StartObjectProperty("payload");
3171     {
3172       w.StringProperty("lastVersion", PromiseFlatCString(lastVersion));
3173       w.StringProperty("lastBuildId", PromiseFlatCString(lastBuildId));
3174       w.BoolProperty("hasSync", aHasSync);
3175       w.IntProperty("button", aButton);
3176     }
3177     w.EndObject();
3178   }
3179   w.End();
3180
3181   fclose(file);
3182
3183   PathString filePath = pingFile->NativePath();
3184   const filesystem::Path::value_type* args[2];
3185 #  ifdef XP_WIN
3186   nsString urlw = NS_ConvertUTF8toUTF16(url);
3187   args[0] = urlw.get();
3188 #  else
3189   args[0] = url.get();
3190 #  endif
3191   args[1] = filePath.get();
3192
3193   nsCOMPtr<nsIProcess> process =
3194       do_CreateInstance("@mozilla.org/process/util;1");
3195   NS_ENSURE_TRUE_VOID(process);
3196   process->Init(pingSender);
3197   process->SetStartHidden(true);
3198   process->SetNoShell(true);
3199
3200 #  ifdef XP_WIN
3201   process->Runw(false, args, 2);
3202 #  else
3203   process->Run(false, args, 2);
3204 #  endif
3205 }
3206
3207 static const char kProfileDowngradeURL[] =
3208     "chrome://mozapps/content/profile/profileDowngrade.xhtml";
3209
3210 static ReturnAbortOnError CheckDowngrade(nsIFile* aProfileDir,
3211                                          nsINativeAppSupport* aNative,
3212                                          nsIToolkitProfileService* aProfileSvc,
3213                                          const nsCString& aLastVersion) {
3214   int32_t result = 0;
3215   nsresult rv;
3216
3217   {
3218     if (gfxPlatform::IsHeadless()) {
3219       // TODO: make a way to turn off all dialogs when headless.
3220       Output(true,
3221              "This profile was last used with a newer version of this "
3222              "application. Please create a new profile.\n");
3223       return NS_ERROR_ABORT;
3224     }
3225
3226     ScopedXPCOMStartup xpcom;
3227     rv = xpcom.Initialize();
3228     NS_ENSURE_SUCCESS(rv, rv);
3229
3230     rv = xpcom.SetWindowCreator(aNative);
3231     NS_ENSURE_SUCCESS(rv, rv);
3232
3233     {  // extra scoping is needed so we release these components before xpcom
3234        // shutdown
3235       bool hasSync = false;
3236       nsCOMPtr<nsIPrefService> prefSvc =
3237           do_GetService("@mozilla.org/preferences-service;1");
3238       NS_ENSURE_TRUE(prefSvc, rv);
3239
3240       nsCOMPtr<nsIFile> prefsFile;
3241       rv = aProfileDir->Clone(getter_AddRefs(prefsFile));
3242       NS_ENSURE_SUCCESS(rv, rv);
3243
3244       rv = prefsFile->Append(u"prefs.js"_ns);
3245       NS_ENSURE_SUCCESS(rv, rv);
3246
3247       rv = prefSvc->ReadUserPrefsFromFile(prefsFile);
3248       if (NS_SUCCEEDED(rv)) {
3249         nsCOMPtr<nsIPrefBranch> prefBranch = do_QueryInterface(prefSvc);
3250
3251         rv = prefBranch->PrefHasUserValue("services.sync.username", &hasSync);
3252         NS_ENSURE_SUCCESS(rv, rv);
3253       }
3254
3255       nsCOMPtr<nsIWindowWatcher> windowWatcher =
3256           do_GetService(NS_WINDOWWATCHER_CONTRACTID);
3257       NS_ENSURE_TRUE(windowWatcher, NS_ERROR_ABORT);
3258
3259       nsCOMPtr<nsIAppStartup> appStartup(components::AppStartup::Service());
3260       NS_ENSURE_TRUE(appStartup, NS_ERROR_FAILURE);
3261
3262       nsCOMPtr<nsIDialogParamBlock> paramBlock =
3263           do_CreateInstance(NS_DIALOGPARAMBLOCK_CONTRACTID);
3264       NS_ENSURE_TRUE(paramBlock, NS_ERROR_ABORT);
3265
3266       uint8_t flags = 0;
3267       if (hasSync) {
3268         flags |= nsIToolkitProfileService::hasSync;
3269       }
3270
3271       paramBlock->SetInt(0, flags);
3272
3273       nsAutoCString features("centerscreen,chrome,modal,titlebar");
3274       // If we're launching a private browsing window make sure to set that
3275       // feature for the Profile Manager window as well, so it groups correctly
3276       // on the Windows taskbar.
3277       if (CheckArgExists("private-window") == ARG_FOUND) {
3278         features.AppendLiteral(",private");
3279       }
3280       nsCOMPtr<mozIDOMWindowProxy> newWindow;
3281       rv = windowWatcher->OpenWindow(
3282           nullptr, nsDependentCString(kProfileDowngradeURL), "_blank"_ns,
3283           features, paramBlock, getter_AddRefs(newWindow));
3284       NS_ENSURE_SUCCESS(rv, rv);
3285
3286       paramBlock->GetInt(1, &result);
3287
3288       SubmitDowngradeTelemetry(aLastVersion, hasSync, result);
3289     }
3290   }
3291
3292   if (result == nsIToolkitProfileService::createNewProfile) {
3293     // Create a new profile and start it.
3294     nsCString profileName;
3295     profileName.AssignLiteral("default");
3296 #  ifdef MOZ_DEDICATED_PROFILES
3297     profileName.Append("-" MOZ_STRINGIFY(MOZ_UPDATE_CHANNEL));
3298 #  endif
3299     nsCOMPtr<nsIToolkitProfile> newProfile;
3300     rv = aProfileSvc->CreateUniqueProfile(nullptr, profileName,
3301                                           getter_AddRefs(newProfile));
3302     NS_ENSURE_SUCCESS(rv, rv);
3303     rv = aProfileSvc->SetDefaultProfile(newProfile);
3304     NS_ENSURE_SUCCESS(rv, rv);
3305     rv = aProfileSvc->Flush();
3306     NS_ENSURE_SUCCESS(rv, rv);
3307
3308     nsCOMPtr<nsIFile> profD, profLD;
3309     rv = newProfile->GetRootDir(getter_AddRefs(profD));
3310     NS_ENSURE_SUCCESS(rv, rv);
3311     rv = newProfile->GetLocalDir(getter_AddRefs(profLD));
3312     NS_ENSURE_SUCCESS(rv, rv);
3313
3314     SaveFileToEnv("XRE_PROFILE_PATH", profD);
3315     SaveFileToEnv("XRE_PROFILE_LOCAL_PATH", profLD);
3316
3317     return LaunchChild(false, true);
3318   }
3319
3320   // Cancel
3321   return NS_ERROR_ABORT;
3322 }
3323 #endif
3324
3325 /**
3326  * Extracts the various parts of a compatibility version string.
3327  *
3328  * Compatibility versions are of the form
3329  * "<appversion>_<appbuildid>/<platformbuildid>". The toolkit version comparator
3330  * can only handle 32-bit numbers and in the normal case build IDs are larger
3331  * than this. So if the build ID is numeric we split it into two version parts.
3332  */
3333 static void ExtractCompatVersionInfo(const nsACString& aCompatVersion,
3334                                      nsACString& aAppVersion,
3335                                      nsACString& aAppBuildID) {
3336   int32_t underscorePos = aCompatVersion.FindChar('_');
3337   int32_t slashPos = aCompatVersion.FindChar('/');
3338
3339   if (underscorePos == kNotFound || slashPos == kNotFound ||
3340       slashPos < underscorePos) {
3341     NS_WARNING(
3342         "compatibility.ini Version string does not match the expected format.");
3343
3344     // Fall back to just using the entire string as the version.
3345     aAppVersion = aCompatVersion;
3346     aAppBuildID.Truncate(0);
3347     return;
3348   }
3349
3350   aAppVersion = Substring(aCompatVersion, 0, underscorePos);
3351   aAppBuildID = Substring(aCompatVersion, underscorePos + 1,
3352                           slashPos - (underscorePos + 1));
3353 }
3354
3355 /**
3356  * Compares the provided compatibility versions. Returns 0 if they match,
3357  * < 0 if the new version is considered an upgrade from the old version and
3358  * > 0 if the new version is considered a downgrade from the old version.
3359  */
3360 int32_t CompareCompatVersions(const nsACString& aOldCompatVersion,
3361                               const nsACString& aNewCompatVersion) {
3362   // Hardcode the case where the last run was in safe mode (Bug 1556612). We
3363   // cannot tell if this is a downgrade or not so just assume it isn't and let
3364   // the user proceed.
3365   if (aOldCompatVersion.EqualsLiteral("Safe Mode")) {
3366     return -1;
3367   }
3368
3369   // Extract the major version part from the version string and only use that
3370   // for version comparison.
3371   int32_t index = aOldCompatVersion.FindChar('.');
3372   const nsACString& oldMajorVersion = Substring(
3373       aOldCompatVersion, 0, index < 0 ? aOldCompatVersion.Length() : index);
3374   index = aNewCompatVersion.FindChar('.');
3375   const nsACString& newMajorVersion = Substring(
3376       aNewCompatVersion, 0, index < 0 ? aNewCompatVersion.Length() : index);
3377
3378   return CompareVersions(PromiseFlatCString(oldMajorVersion).get(),
3379                          PromiseFlatCString(newMajorVersion).get());
3380 }
3381
3382 /**
3383  * Checks the compatibility.ini file to see if we have updated our application
3384  * or otherwise invalidated our caches. If the application has been updated,
3385  * we return false; otherwise, we return true.
3386  *
3387  * We also write the status of the caches (valid/invalid) into the return param
3388  * aCachesOK. The aCachesOK is always invalid if the application has been
3389  * updated.
3390  *
3391  * Finally, aIsDowngrade is set to true if the current application is older
3392  * than that previously used by the profile.
3393  */
3394 static bool CheckCompatibility(nsIFile* aProfileDir, const nsCString& aVersion,
3395                                const nsCString& aOSABI, nsIFile* aXULRunnerDir,
3396                                nsIFile* aAppDir, nsIFile* aFlagFile,
3397                                bool* aCachesOK, bool* aIsDowngrade,
3398                                nsCString& aLastVersion) {
3399   *aCachesOK = false;
3400   *aIsDowngrade = false;
3401   gLastAppVersion.SetIsVoid(true);
3402   gLastAppBuildID.SetIsVoid(true);
3403
3404   nsCOMPtr<nsIFile> file;
3405   aProfileDir->Clone(getter_AddRefs(file));
3406   if (!file) return false;
3407   file->AppendNative(FILE_COMPATIBILITY_INFO);
3408
3409   nsINIParser parser;
3410   nsresult rv = parser.Init(file);
3411   if (NS_FAILED(rv)) return false;
3412
3413   rv = parser.GetString("Compatibility", "LastVersion", aLastVersion);
3414   if (NS_FAILED(rv)) {
3415     return false;
3416   }
3417
3418   if (!aLastVersion.Equals(aVersion)) {
3419     // The version is not the same. Whether it's a downgrade depends on an
3420     // actual comparison:
3421     *aIsDowngrade = 0 < CompareCompatVersions(aLastVersion, aVersion);
3422     ExtractCompatVersionInfo(aLastVersion, gLastAppVersion, gLastAppBuildID);
3423     return false;
3424   }
3425
3426   // If we get here, the version matched, but there may still be other
3427   // differences between us and the build that the profile last ran under.
3428
3429   gLastAppVersion.Assign(gAppData->version);
3430   gLastAppBuildID.Assign(gAppData->buildID);
3431
3432   nsAutoCString buf;
3433   rv = parser.GetString("Compatibility", "LastOSABI", buf);
3434   if (NS_FAILED(rv) || !aOSABI.Equals(buf)) return false;
3435
3436   rv = parser.GetString("Compatibility", "LastPlatformDir", buf);
3437   if (NS_FAILED(rv)) return false;
3438
3439   nsCOMPtr<nsIFile> lf;
3440   rv = NS_NewNativeLocalFile(""_ns, false, getter_AddRefs(lf));
3441   if (NS_FAILED(rv)) return false;
3442
3443   rv = lf->SetPersistentDescriptor(buf);
3444   if (NS_FAILED(rv)) return false;
3445
3446   bool eq;
3447   rv = lf->Equals(aXULRunnerDir, &eq);
3448   if (NS_FAILED(rv) || !eq) return false;
3449
3450   if (aAppDir) {
3451     rv = parser.GetString("Compatibility", "LastAppDir", buf);
3452     if (NS_FAILED(rv)) return false;
3453
3454     rv = NS_NewNativeLocalFile(""_ns, false, getter_AddRefs(lf));
3455     if (NS_FAILED(rv)) return false;
3456
3457     rv = lf->SetPersistentDescriptor(buf);
3458     if (NS_FAILED(rv)) return false;
3459
3460     rv = lf->Equals(aAppDir, &eq);
3461     if (NS_FAILED(rv) || !eq) return false;
3462   }
3463
3464   // If we see this flag, caches are invalid.
3465   rv = parser.GetString("Compatibility", "InvalidateCaches", buf);
3466   *aCachesOK = (NS_FAILED(rv) || !buf.EqualsLiteral("1"));
3467
3468   bool purgeCaches = false;
3469   if (aFlagFile && NS_SUCCEEDED(aFlagFile->Exists(&purgeCaches)) &&
3470       purgeCaches) {
3471     *aCachesOK = false;
3472   }
3473
3474   return true;
3475 }
3476
3477 void BuildCompatVersion(const char* aAppVersion, const char* aAppBuildID,
3478                         const char* aToolkitBuildID, nsACString& aBuf) {
3479   aBuf.Assign(aAppVersion);
3480   aBuf.Append('_');
3481   aBuf.Append(aAppBuildID);
3482   aBuf.Append('/');
3483   aBuf.Append(aToolkitBuildID);
3484 }
3485
3486 static void BuildVersion(nsCString& aBuf) {
3487   BuildCompatVersion(gAppData->version, gAppData->buildID, gToolkitBuildID,
3488                      aBuf);
3489 }
3490
3491 static void WriteVersion(nsIFile* aProfileDir, const nsCString& aVersion,
3492                          const nsCString& aOSABI, nsIFile* aXULRunnerDir,
3493                          nsIFile* aAppDir, bool invalidateCache) {
3494   nsCOMPtr<nsIFile> file;
3495   aProfileDir->Clone(getter_AddRefs(file));
3496   if (!file) return;
3497   file->AppendNative(FILE_COMPATIBILITY_INFO);
3498
3499   nsAutoCString platformDir;
3500   Unused << aXULRunnerDir->GetPersistentDescriptor(platformDir);
3501
3502   nsAutoCString appDir;
3503   if (aAppDir) Unused << aAppDir->GetPersistentDescriptor(appDir);
3504
3505   PRFileDesc* fd;
3506   nsresult rv = file->OpenNSPRFileDesc(PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE,
3507                                        0600, &fd);
3508   if (NS_FAILED(rv)) {
3509     NS_ERROR("could not create output stream");
3510     return;
3511   }
3512
3513   static const char kHeader[] = "[Compatibility]" NS_LINEBREAK "LastVersion=";
3514
3515   PR_Write(fd, kHeader, sizeof(kHeader) - 1);
3516   PR_Write(fd, aVersion.get(), aVersion.Length());
3517
3518   static const char kOSABIHeader[] = NS_LINEBREAK "LastOSABI=";
3519   PR_Write(fd, kOSABIHeader, sizeof(kOSABIHeader) - 1);
3520   PR_Write(fd, aOSABI.get(), aOSABI.Length());
3521
3522   static const char kPlatformDirHeader[] = NS_LINEBREAK "LastPlatformDir=";
3523
3524   PR_Write(fd, kPlatformDirHeader, sizeof(kPlatformDirHeader) - 1);
3525   PR_Write(fd, platformDir.get(), platformDir.Length());
3526
3527   static const char kAppDirHeader[] = NS_LINEBREAK "LastAppDir=";
3528   if (aAppDir) {
3529     PR_Write(fd, kAppDirHeader, sizeof(kAppDirHeader) - 1);
3530     PR_Write(fd, appDir.get(), appDir.Length());
3531   }
3532
3533   static const char kInvalidationHeader[] = NS_LINEBREAK "InvalidateCaches=1";
3534   if (invalidateCache)
3535     PR_Write(fd, kInvalidationHeader, sizeof(kInvalidationHeader) - 1);
3536
3537   static const char kNL[] = NS_LINEBREAK;
3538   PR_Write(fd, kNL, sizeof(kNL) - 1);
3539
3540   PR_Close(fd);
3541 }
3542
3543 /**
3544  * Returns true if the startup cache file was successfully removed.
3545  * Returns false if file->Clone fails at any point (OOM) or if unable
3546  * to remove the startup cache file. Note in particular the return value
3547  * is unaffected by a failure to remove extensions.ini
3548  */
3549 static bool RemoveComponentRegistries(nsIFile* aProfileDir,
3550                                       nsIFile* aLocalProfileDir,
3551                                       bool aRemoveEMFiles) {
3552   nsCOMPtr<nsIFile> file;
3553   aProfileDir->Clone(getter_AddRefs(file));
3554   if (!file) return false;
3555
3556   if (aRemoveEMFiles) {
3557     file->SetNativeLeafName("extensions.ini"_ns);
3558     file->Remove(false);
3559   }
3560
3561   aLocalProfileDir->Clone(getter_AddRefs(file));
3562   if (!file) return false;
3563
3564   file->AppendNative("startupCache"_ns);
3565   nsresult rv = file->Remove(true);
3566   return NS_SUCCEEDED(rv) || rv == NS_ERROR_FILE_NOT_FOUND;
3567 }
3568
3569 // When we first initialize the crash reporter we don't have a profile,
3570 // so we set the minidump path to $TEMP.  Once we have a profile,
3571 // we set it to $PROFILE/minidumps, creating the directory
3572 // if needed.
3573 static void MakeOrSetMinidumpPath(nsIFile* profD) {
3574   nsCOMPtr<nsIFile> dumpD;
3575   profD->Clone(getter_AddRefs(dumpD));
3576
3577   if (dumpD) {
3578     bool fileExists;
3579     // XXX: do some more error checking here
3580     dumpD->Append(u"minidumps"_ns);
3581     dumpD->Exists(&fileExists);
3582     if (!fileExists) {
3583       nsresult rv = dumpD->Create(nsIFile::DIRECTORY_TYPE, 0700);
3584       NS_ENSURE_SUCCESS_VOID(rv);
3585     }
3586
3587     nsAutoString pathStr;
3588     if (NS_SUCCEEDED(dumpD->GetPath(pathStr)))
3589       CrashReporter::SetMinidumpPath(pathStr);
3590   }
3591 }
3592
3593 const XREAppData* gAppData = nullptr;
3594
3595 /**
3596  * NSPR will search for the "nspr_use_zone_allocator" symbol throughout
3597  * the process and use it to determine whether the application defines its own
3598  * memory allocator or not.
3599  *
3600  * Since most applications (e.g. Firefox and Thunderbird) don't use any special
3601  * allocators and therefore don't define this symbol, NSPR must search the
3602  * entire process, which reduces startup performance.
3603  *
3604  * By defining the symbol here, we can avoid the wasted lookup and hopefully
3605  * improve startup performance.
3606  */
3607 NS_VISIBILITY_DEFAULT PRBool nspr_use_zone_allocator = PR_FALSE;
3608
3609 #ifdef CAIRO_HAS_DWRITE_FONT
3610
3611 #  include <dwrite.h>
3612 #  include "nsWindowsHelpers.h"
3613
3614 #  ifdef DEBUG_DWRITE_STARTUP
3615
3616 #    define LOGREGISTRY(msg) LogRegistryEvent(msg)
3617
3618 // for use when monitoring process
3619 static void LogRegistryEvent(const wchar_t* msg) {
3620   HKEY dummyKey;
3621   HRESULT hr;
3622   wchar_t buf[512];
3623
3624   wsprintf(buf, L" log %s", msg);
3625   hr = RegOpenKeyEx(HKEY_LOCAL_MACHINE, buf, 0, KEY_READ, &dummyKey);
3626   if (SUCCEEDED(hr)) {
3627     RegCloseKey(dummyKey);
3628   }
3629 }
3630 #  else
3631
3632 #    define LOGREGISTRY(msg)
3633
3634 #  endif
3635
3636 static DWORD WINAPI InitDwriteBG(LPVOID lpdwThreadParam) {
3637   SetThreadPriority(GetCurrentThread(), THREAD_MODE_BACKGROUND_BEGIN);
3638   LOGREGISTRY(L"loading dwrite.dll");
3639   HMODULE dwdll = LoadLibrarySystem32(L"dwrite.dll");
3640   if (dwdll) {
3641     decltype(DWriteCreateFactory)* createDWriteFactory =
3642         (decltype(DWriteCreateFactory)*)GetProcAddress(dwdll,
3643                                                        "DWriteCreateFactory");
3644     if (createDWriteFactory) {
3645       LOGREGISTRY(L"creating dwrite factory");
3646       IDWriteFactory* factory;
3647       HRESULT hr = createDWriteFactory(DWRITE_FACTORY_TYPE_SHARED,
3648                                        __uuidof(IDWriteFactory),
3649                                        reinterpret_cast<IUnknown**>(&factory));
3650       if (SUCCEEDED(hr)) {
3651         LOGREGISTRY(L"dwrite factory done");
3652         factory->Release();
3653         LOGREGISTRY(L"freed factory");
3654       } else {
3655         LOGREGISTRY(L"failed to create factory");
3656       }
3657     }
3658   }
3659   SetThreadPriority(GetCurrentThread(), THREAD_MODE_BACKGROUND_END);
3660   return 0;
3661 }
3662 #endif
3663
3664 #include "GeckoProfiler.h"
3665 #include "ProfilerControl.h"
3666
3667 // Encapsulates startup and shutdown state for XRE_main
3668 class XREMain {
3669  public:
3670   XREMain() = default;
3671
3672   ~XREMain() {
3673     mScopedXPCOM = nullptr;
3674     mAppData = nullptr;
3675   }
3676
3677   int XRE_main(int argc, char* argv[], const BootstrapConfig& aConfig);
3678   int XRE_mainInit(bool* aExitFlag);
3679   int XRE_mainStartup(bool* aExitFlag);
3680   nsresult XRE_mainRun();
3681
3682   bool CheckLastStartupWasCrash();
3683
3684   nsCOMPtr<nsINativeAppSupport> mNativeApp;
3685   RefPtr<nsToolkitProfileService> mProfileSvc;
3686   nsCOMPtr<nsIFile> mProfD;
3687   nsCOMPtr<nsIFile> mProfLD;
3688   nsCOMPtr<nsIProfileLock> mProfileLock;
3689 #if defined(MOZ_HAS_REMOTE)
3690   RefPtr<nsRemoteService> mRemoteService;
3691 #endif
3692
3693   UniquePtr<ScopedXPCOMStartup> mScopedXPCOM;
3694   UniquePtr<XREAppData> mAppData;
3695
3696   nsXREDirProvider mDirProvider;
3697
3698 #ifdef MOZ_WIDGET_GTK
3699   nsAutoCString mXDGActivationToken;
3700   nsAutoCString mDesktopStartupID;
3701 #endif
3702
3703   bool mStartOffline = false;
3704 #if defined(MOZ_HAS_REMOTE)
3705   bool mDisableRemoteClient = false;
3706   bool mDisableRemoteServer = false;
3707 #endif
3708 };
3709
3710 #if defined(XP_UNIX) && !defined(ANDROID)
3711 static SmprintfPointer FormatUid(uid_t aId) {
3712   if (const auto pw = getpwuid(aId)) {
3713     return mozilla::Smprintf("%s", pw->pw_name);
3714   }
3715   return mozilla::Smprintf("uid %d", static_cast<int>(aId));
3716 }
3717
3718 // Bug 1323302: refuse to run under sudo or similar.
3719 static bool CheckForUserMismatch() {
3720   static char const* const kVars[] = {
3721       "HOME",
3722 #  ifdef MOZ_WIDGET_GTK
3723       "XDG_RUNTIME_DIR",
3724 #  endif
3725 #  ifdef MOZ_X11
3726       "XAUTHORITY",
3727 #  endif
3728   };
3729
3730   const uid_t euid = geteuid();
3731   if (euid != 0) {
3732     // On Linux it's possible to have superuser capabilities with a
3733     // nonzero uid, but anyone who knows enough to make that happen
3734     // probably knows enough to debug the resulting problems.
3735     // Otherwise, a non-root user can't cause the problems we're
3736     // concerned about.
3737     return false;
3738   }
3739
3740   for (const auto var : kVars) {
3741     if (const auto path = PR_GetEnv(var)) {
3742       struct stat st;
3743       if (stat(path, &st) == 0) {
3744         if (st.st_uid != euid) {
3745           const auto owner = FormatUid(st.st_uid);
3746           Output(true,
3747                  "Running " MOZ_APP_DISPLAYNAME
3748                  " as root in a regular"
3749                  " user's session is not supported.  ($%s is %s which is"
3750                  " owned by %s.)\n",
3751                  var, path, owner.get());
3752           return true;
3753         }
3754       }
3755     }
3756   }
3757   return false;
3758 }
3759 #else  // !XP_UNIX || ANDROID
3760 static bool CheckForUserMismatch() { return false; }
3761 #endif
3762
3763 void mozilla::startup::IncreaseDescriptorLimits() {
3764 #ifdef XP_UNIX
3765   // Increase the fd limit to accomodate IPC resources like shared memory.
3766   // See also the Darwin case in config/external/nspr/pr/moz.build
3767   static const rlim_t kFDs = 4096;
3768   struct rlimit rlim;
3769
3770   if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
3771     Output(false, "getrlimit: %s\n", strerror(errno));
3772     return;
3773   }
3774   // Don't decrease the limit if it's already high enough, but don't
3775   // try to go over the hard limit.  (RLIM_INFINITY isn't required to
3776   // be the numerically largest rlim_t, so don't assume that.)
3777   if (rlim.rlim_cur != RLIM_INFINITY && rlim.rlim_cur < kFDs &&
3778       rlim.rlim_cur < rlim.rlim_max) {
3779     if (rlim.rlim_max != RLIM_INFINITY && rlim.rlim_max < kFDs) {
3780       rlim.rlim_cur = rlim.rlim_max;
3781     } else {
3782       rlim.rlim_cur = kFDs;
3783     }
3784     if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
3785       Output(false, "setrlimit: %s\n", strerror(errno));
3786     }
3787   }
3788 #endif
3789 }
3790
3791 #ifdef XP_WIN
3792
3793 static uint32_t GetMicrocodeVersionByVendor(HKEY key, DWORD upper,
3794                                             DWORD lower) {
3795   WCHAR data[13];  // The CPUID vendor string is 12 characters long plus null
3796   DWORD len = sizeof(data);
3797   DWORD vtype;
3798
3799   if (RegQueryValueExW(key, L"VendorIdentifier", nullptr, &vtype,
3800                        reinterpret_cast<LPBYTE>(data), &len) == ERROR_SUCCESS) {
3801     if (wcscmp(L"GenuineIntel", data) == 0) {
3802       // Intel reports the microcode version in the upper 32 bits of the MSR
3803       return upper;
3804     }
3805
3806     if (wcscmp(L"AuthenticAMD", data) == 0) {
3807       // AMD reports the microcode version in the lower 32 bits of the MSR
3808       return lower;
3809     }
3810
3811     // Unknown CPU vendor, return whatever half is non-zero
3812     return lower ? lower : upper;
3813   }
3814
3815   return 0;  // No clue
3816 }
3817
3818 #endif  // XP_WIN
3819
3820 static void MaybeAddCPUMicrocodeCrashAnnotation() {
3821 #ifdef XP_WIN
3822   // Add CPU microcode version to the crash report as "CPUMicrocodeVersion".
3823   // It feels like this code may belong in nsSystemInfo instead.
3824   uint32_t cpuUpdateRevision = 0;
3825   HKEY key;
3826   static const WCHAR keyName[] =
3827       L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0";
3828
3829   if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, keyName, 0, KEY_QUERY_VALUE, &key) ==
3830       ERROR_SUCCESS) {
3831     DWORD updateRevision[2];
3832     DWORD len = sizeof(updateRevision);
3833     DWORD vtype;
3834
3835     // Windows 7 uses "Update Signature", 8 uses "Update Revision".
3836     // For AMD CPUs, "CurrentPatchLevel" is sometimes used.
3837     // Take the first one we find.
3838     LPCWSTR choices[] = {L"Update Signature", L"Update Revision",
3839                          L"CurrentPatchLevel"};
3840     for (const auto& oneChoice : choices) {
3841       if (RegQueryValueExW(key, oneChoice, nullptr, &vtype,
3842                            reinterpret_cast<LPBYTE>(updateRevision),
3843                            &len) == ERROR_SUCCESS) {
3844         if (vtype == REG_BINARY && len == sizeof(updateRevision)) {
3845           cpuUpdateRevision = GetMicrocodeVersionByVendor(
3846               key, updateRevision[1], updateRevision[0]);
3847           break;
3848         }
3849
3850         if (vtype == REG_DWORD && len == sizeof(updateRevision[0])) {
3851           cpuUpdateRevision = static_cast<int>(updateRevision[0]);
3852           break;
3853         }
3854       }
3855     }
3856   }
3857
3858   if (cpuUpdateRevision > 0) {
3859     CrashReporter::RecordAnnotationNSCString(
3860         CrashReporter::Annotation::CPUMicrocodeVersion,
3861         nsPrintfCString("0x%" PRIx32, cpuUpdateRevision));
3862   }
3863 #endif
3864 }
3865
3866 #if defined(MOZ_BACKGROUNDTASKS)
3867 static void SetupConsoleForBackgroundTask(
3868     const nsCString& aBackgroundTaskName) {
3869   // We do not suppress output on Windows because:
3870   // 1. Background task subprocesses launched via LaunchApp() does not attach to
3871   //    the console.
3872   // 2. Suppressing output intermittently causes failures on when running
3873   //    multiple tasks (see bug 1831631)
3874 #  ifndef XP_WIN
3875   if (BackgroundTasks::IsNoOutputTaskName(aBackgroundTaskName) &&
3876       !CheckArg("attach-console") &&
3877       !EnvHasValue("MOZ_BACKGROUNDTASKS_IGNORE_NO_OUTPUT")) {
3878     // Suppress output, somewhat crudely.  We need to suppress stderr as well
3879     // as stdout because assertions, of which there are many, write to stderr.
3880     Unused << freopen("/dev/null", "w", stdout);
3881     Unused << freopen("/dev/null", "w", stderr);
3882     return;
3883   }
3884 #  endif
3885   printf_stderr("*** You are running in background task mode. ***\n");
3886 }
3887 #endif
3888
3889 /*
3890  * XRE_mainInit - Initial setup and command line parameter processing.
3891  * Main() will exit early if either return value != 0 or if aExitFlag is
3892  * true.
3893  */
3894 int XREMain::XRE_mainInit(bool* aExitFlag) {
3895   if (!aExitFlag) return 1;
3896   *aExitFlag = false;
3897
3898   atexit(UnexpectedExit);
3899   auto expectedShutdown = mozilla::MakeScopeExit([&] { MozExpectedExit(); });
3900
3901   StartupTimeline::Record(StartupTimeline::MAIN);
3902
3903   if (CheckForUserMismatch()) {
3904     return 1;
3905   }
3906
3907 #ifdef XP_MACOSX
3908   mozilla::MacAutoreleasePool pool;
3909
3910   DisableAppNap();
3911 #endif
3912
3913 #ifdef MOZ_BACKGROUNDTASKS
3914   Maybe<nsCString> backgroundTask = Nothing();
3915   const char* backgroundTaskName = nullptr;
3916   if (ARG_FOUND ==
3917       CheckArg("backgroundtask", &backgroundTaskName, CheckArgFlag::None)) {
3918     backgroundTask = Some(backgroundTaskName);
3919
3920     SetupConsoleForBackgroundTask(backgroundTask.ref());
3921   }
3922
3923   BackgroundTasks::Init(backgroundTask);
3924 #endif
3925
3926 #ifndef ANDROID
3927   if (PR_GetEnv("MOZ_RUN_GTEST")
3928 #  ifdef FUZZING
3929       || PR_GetEnv("FUZZER")
3930 #  endif
3931 #  ifdef MOZ_BACKGROUNDTASKS
3932       || BackgroundTasks::IsBackgroundTaskMode()
3933 #  endif
3934   ) {
3935     // Enable headless mode and assert that it worked, since gfxPlatform
3936     // uses a static bool set after the first call to `IsHeadless`.
3937     // Note: Android gtests seem to require an Activity and fail to start
3938     // with headless mode enabled.
3939     PR_SetEnv("MOZ_HEADLESS=1");
3940     MOZ_ASSERT(gfxPlatform::IsHeadless());
3941   }
3942 #endif  // ANDROID
3943
3944   if (PR_GetEnv("MOZ_CHAOSMODE")) {
3945     ChaosFeature feature = ChaosFeature::Any;
3946     long featureInt = strtol(PR_GetEnv("MOZ_CHAOSMODE"), nullptr, 16);
3947     if (featureInt) {
3948       // NOTE: MOZ_CHAOSMODE=0 or a non-hex value maps to Any feature.
3949       feature = static_cast<ChaosFeature>(featureInt);
3950     }
3951     ChaosMode::SetChaosFeature(feature);
3952   }
3953
3954   if (CheckArgExists("fxr")) {
3955     gFxREmbedded = true;
3956   }
3957
3958   if (ChaosMode::isActive(ChaosFeature::Any)) {
3959     printf_stderr(
3960         "*** You are running in chaos test mode. See ChaosMode.h. ***\n");
3961   }
3962
3963   if (CheckArg("headless") || CheckArgExists("screenshot")) {
3964     PR_SetEnv("MOZ_HEADLESS=1");
3965   }
3966
3967   if (gfxPlatform::IsHeadless()) {
3968 #if defined(XP_WIN) || defined(MOZ_WIDGET_GTK) || defined(XP_MACOSX)
3969     printf_stderr("*** You are running in headless mode.\n");
3970 #else
3971     Output(
3972         true,
3973         "Error: headless mode is not currently supported on this platform.\n");
3974     return 1;
3975 #endif
3976
3977 #ifdef XP_MACOSX
3978     // To avoid taking focus when running in headless mode immediately
3979     // transition Firefox to a background application.
3980     ProcessSerialNumber psn = {0, kCurrentProcess};
3981     OSStatus transformStatus =
3982         TransformProcessType(&psn, kProcessTransformToBackgroundApplication);
3983     if (transformStatus != noErr) {
3984       NS_ERROR("Failed to make process a background application.");
3985       return 1;
3986     }
3987 #endif
3988   }
3989
3990   gKioskMode = CheckArg("kiosk", nullptr, CheckArgFlag::None);
3991   const char* kioskMonitorNumber = nullptr;
3992   if (CheckArg("kiosk-monitor", &kioskMonitorNumber, CheckArgFlag::None)) {
3993     gKioskMode = true;
3994     gKioskMonitor = atoi(kioskMonitorNumber);
3995   }
3996
3997   gAllowContentAnalysisArgPresent =
3998       CheckArg("allow-content-analysis", nullptr, CheckArgFlag::RemoveArg) ==
3999       ARG_FOUND;
4000
4001   nsresult rv;
4002   ArgResult ar;
4003
4004 #ifdef DEBUG
4005   if (PR_GetEnv("XRE_MAIN_BREAK")) NS_BREAK();
4006 #endif
4007
4008   mozilla::startup::IncreaseDescriptorLimits();
4009
4010   SetupErrorHandling(gArgv[0]);
4011
4012 #ifdef CAIRO_HAS_DWRITE_FONT
4013   {
4014     // Bug 602792 - when DWriteCreateFactory is called the dwrite client dll
4015     // starts the FntCache service if it isn't already running (it's set
4016     // to manual startup by default in Windows 7 RTM).  Subsequent DirectWrite
4017     // calls cause the IDWriteFactory object to communicate with the FntCache
4018     // service with a timeout; if there's no response after the timeout, the
4019     // DirectWrite client library will assume the service isn't around and do
4020     // manual font file I/O on _all_ system fonts.  To avoid this, load the
4021     // dwrite library and create a factory as early as possible so that the
4022     // FntCache service is ready by the time it's needed.
4023
4024     CreateThread(nullptr, 0, &InitDwriteBG, nullptr, 0, nullptr);
4025   }
4026 #endif
4027
4028 #ifdef XP_UNIX
4029   const char* home = PR_GetEnv("HOME");
4030   if (!home || !*home) {
4031     struct passwd* pw = getpwuid(geteuid());
4032     if (!pw || !pw->pw_dir) {
4033       Output(true, "Could not determine HOME directory");
4034       return 1;
4035     }
4036     SaveWordToEnv("HOME", nsDependentCString(pw->pw_dir));
4037   }
4038 #endif
4039
4040 #ifdef MOZ_ACCESSIBILITY_ATK
4041   // Suppress atk-bridge init at startup, until mozilla accessibility is
4042   // initialized.  This works after gnome 2.24.2.
4043   SaveToEnv("NO_AT_BRIDGE=1");
4044 #endif
4045
4046   // Check for application.ini overrides
4047   const char* override = nullptr;
4048   ar = CheckArg("override", &override);
4049   if (ar == ARG_BAD) {
4050     Output(true, "Incorrect number of arguments passed to --override");
4051     return 1;
4052   }
4053   if (ar == ARG_FOUND) {
4054     nsCOMPtr<nsIFile> overrideLF;
4055     rv = XRE_GetFileFromPath(override, getter_AddRefs(overrideLF));
4056     if (NS_FAILED(rv)) {
4057       Output(true, "Error: unrecognized override.ini path.\n");
4058       return 1;
4059     }
4060
4061     rv = XRE_ParseAppData(overrideLF, *mAppData);
4062     if (NS_FAILED(rv)) {
4063       Output(true, "Couldn't read override.ini");
4064       return 1;
4065     }
4066   }
4067
4068   // Check sanity and correctness of app data.
4069
4070   if (!mAppData->name) {
4071     Output(true, "Error: App:Name not specified in application.ini\n");
4072     return 1;
4073   }
4074   if (!mAppData->buildID) {
4075     Output(true, "Error: App:BuildID not specified in application.ini\n");
4076     return 1;
4077   }
4078
4079   // XXX Originally ScopedLogging was here? Now it's in XRE_main above
4080   // XRE_mainInit.
4081
4082   if (!mAppData->minVersion) {
4083     Output(true, "Error: Gecko:MinVersion not specified in application.ini\n");
4084     return 1;
4085   }
4086
4087   if (!mAppData->maxVersion) {
4088     // If no maxVersion is specified, we assume the app is only compatible
4089     // with the initial preview release. Do not increment this number ever!
4090     mAppData->maxVersion = "1.*";
4091   }
4092
4093   if (mozilla::Version(mAppData->minVersion) > gToolkitVersion ||
4094       mozilla::Version(mAppData->maxVersion) < gToolkitVersion) {
4095     Output(true,
4096            "Error: Platform version '%s' is not compatible with\n"
4097            "minVersion >= %s\nmaxVersion <= %s\n",
4098            (const char*)gToolkitVersion, (const char*)mAppData->minVersion,
4099            (const char*)mAppData->maxVersion);
4100     return 1;
4101   }
4102
4103   rv = mDirProvider.Initialize(mAppData->directory, mAppData->xreDirectory);
4104   if (NS_FAILED(rv)) return 1;
4105
4106   if (EnvHasValue("MOZ_CRASHREPORTER")) {
4107     mAppData->flags |= NS_XRE_ENABLE_CRASH_REPORTER;
4108   }
4109
4110   nsCOMPtr<nsIFile> xreBinDirectory;
4111   xreBinDirectory = mDirProvider.GetGREBinDir();
4112
4113   if ((mAppData->flags & NS_XRE_ENABLE_CRASH_REPORTER) &&
4114       NS_SUCCEEDED(CrashReporter::SetExceptionHandler(xreBinDirectory))) {
4115     nsCOMPtr<nsIFile> file;
4116     rv = nsXREDirProvider::GetUserAppDataDirectory(getter_AddRefs(file));
4117     if (NS_SUCCEEDED(rv)) {
4118       CrashReporter::SetUserAppDataDirectory(file);
4119     }
4120     if (mAppData->crashReporterURL) {
4121       CrashReporter::SetServerURL(
4122           nsDependentCString(mAppData->crashReporterURL));
4123     }
4124
4125     // We overwrite this once we finish starting up.
4126     CrashReporter::RecordAnnotationBool(CrashReporter::Annotation::StartupCrash,
4127                                         true);
4128
4129     // pass some basic info from the app data
4130     if (mAppData->vendor) {
4131       CrashReporter::RecordAnnotationCString(CrashReporter::Annotation::Vendor,
4132                                              mAppData->vendor);
4133     }
4134     if (mAppData->name) {
4135       CrashReporter::RecordAnnotationCString(
4136           CrashReporter::Annotation::ProductName, mAppData->name);
4137     }
4138     if (mAppData->ID) {
4139       CrashReporter::RecordAnnotationCString(
4140           CrashReporter::Annotation::ProductID, mAppData->ID);
4141     }
4142     if (mAppData->version) {
4143       CrashReporter::RecordAnnotationCString(CrashReporter::Annotation::Version,
4144                                              mAppData->version);
4145     }
4146     if (mAppData->buildID) {
4147       CrashReporter::RecordAnnotationCString(CrashReporter::Annotation::BuildID,
4148                                              mAppData->buildID);
4149     }
4150
4151     nsDependentCString releaseChannel(MOZ_STRINGIFY(MOZ_UPDATE_CHANNEL));
4152     CrashReporter::RecordAnnotationNSCString(
4153         CrashReporter::Annotation::ReleaseChannel, releaseChannel);
4154
4155 #ifdef XP_WIN
4156     nsAutoString appInitDLLs;
4157     if (widget::WinUtils::GetAppInitDLLs(appInitDLLs)) {
4158       CrashReporter::RecordAnnotationNSString(
4159           CrashReporter::Annotation::AppInitDLLs, appInitDLLs);
4160     }
4161
4162     nsString packageFamilyName = widget::WinUtils::GetPackageFamilyName();
4163     if (StringBeginsWith(packageFamilyName, u"Mozilla."_ns) ||
4164         StringBeginsWith(packageFamilyName, u"MozillaCorporation."_ns)) {
4165       CrashReporter::RecordAnnotationNSCString(
4166           CrashReporter::Annotation::WindowsPackageFamilyName,
4167           NS_ConvertUTF16toUTF8(packageFamilyName));
4168     }
4169 #endif
4170
4171     bool isBackgroundTaskMode = false;
4172 #ifdef MOZ_BACKGROUNDTASKS
4173     Maybe<nsCString> backgroundTasks = BackgroundTasks::GetBackgroundTasks();
4174     if (backgroundTasks.isSome()) {
4175       isBackgroundTaskMode = true;
4176       CrashReporter::RecordAnnotationNSCString(
4177           CrashReporter::Annotation::BackgroundTaskName, backgroundTasks.ref());
4178     }
4179 #endif
4180     CrashReporter::RecordAnnotationBool(
4181         CrashReporter::Annotation::BackgroundTaskMode, isBackgroundTaskMode);
4182
4183     CrashReporter::RecordAnnotationBool(CrashReporter::Annotation::HeadlessMode,
4184                                         gfxPlatform::IsHeadless());
4185
4186     CrashReporter::SetRestartArgs(gArgc, gArgv);
4187
4188     // annotate other data (user id etc)
4189     nsCOMPtr<nsIFile> userAppDataDir;
4190     if (NS_SUCCEEDED(mDirProvider.GetUserAppDataDirectory(
4191             getter_AddRefs(userAppDataDir)))) {
4192       CrashReporter::SetupExtraData(userAppDataDir,
4193                                     nsDependentCString(mAppData->buildID));
4194
4195       // see if we have a crashreporter-override.ini in the application
4196       // directory
4197       nsCOMPtr<nsIFile> overrideini;
4198       if (NS_SUCCEEDED(
4199               mDirProvider.GetAppDir()->Clone(getter_AddRefs(overrideini))) &&
4200           NS_SUCCEEDED(
4201               overrideini->AppendNative("crashreporter-override.ini"_ns))) {
4202 #ifdef XP_WIN
4203         nsAutoString overridePathW;
4204         overrideini->GetPath(overridePathW);
4205         NS_ConvertUTF16toUTF8 overridePath(overridePathW);
4206 #else
4207         nsAutoCString overridePath;
4208         overrideini->GetNativePath(overridePath);
4209 #endif
4210
4211         SaveWordToEnv("MOZ_CRASHREPORTER_STRINGS_OVERRIDE", overridePath);
4212       }
4213     }
4214   } else {
4215     // We might have registered a runtime exception module very early in process
4216     // startup to catch early crashes. This is before we have access to ini file
4217     // data, so unregister here if it turns out the crash reporter is disabled.
4218     CrashReporter::UnregisterRuntimeExceptionModule();
4219   }
4220
4221 #if defined(MOZ_SANDBOX) && defined(XP_WIN)
4222   if (mAppData->sandboxBrokerServices) {
4223     nsAutoString binDirPath;
4224     MOZ_ALWAYS_SUCCEEDS(xreBinDirectory->GetPath(binDirPath));
4225     SandboxBroker::Initialize(mAppData->sandboxBrokerServices, binDirPath);
4226   } else {
4227 #  if defined(MOZ_SANDBOX)
4228     // If we're sandboxing content and we fail to initialize, then crashing here
4229     // seems like the sensible option.
4230     if (BrowserTabsRemoteAutostart()) {
4231       MOZ_CRASH("Failed to initialize broker services, can't continue.");
4232     }
4233 #  endif
4234     // Otherwise just warn for the moment, as most things will work.
4235     NS_WARNING(
4236         "Failed to initialize broker services, sandboxed processes will "
4237         "fail to start.");
4238   }
4239 #endif
4240
4241 #ifdef XP_MACOSX
4242   // Set up ability to respond to system (Apple) events. This must occur before
4243   // ProcessUpdates to ensure that links clicked in external applications aren't
4244   // lost when updates are pending.
4245   SetupMacApplicationDelegate(&gRestartedByOS);
4246
4247   if (EnvHasValue("MOZ_LAUNCHED_CHILD")) {
4248     // This is needed, on relaunch, to force the OS to use the "Cocoa Dock
4249     // API".  Otherwise the call to ReceiveNextEvent() below will make it
4250     // use the "Carbon Dock API".  For more info see bmo bug 377166.
4251     EnsureUseCocoaDockAPI();
4252
4253     // When the app relaunches, the original process exits.  This causes
4254     // the dock tile to stop bouncing, lose the "running" triangle, and
4255     // if the tile does not permanently reside in the Dock, even disappear.
4256     // This can be confusing to the user, who is expecting the app to launch.
4257     // Calling ReceiveNextEvent without requesting any event is enough to
4258     // cause a dock tile for the child process to appear.
4259     const EventTypeSpec kFakeEventList[] = {{INT_MAX, INT_MAX}};
4260     EventRef event;
4261     ::ReceiveNextEvent(GetEventTypeCount(kFakeEventList), kFakeEventList,
4262                        kEventDurationNoWait, false, &event);
4263   }
4264
4265   if (CheckArg("foreground")) {
4266     // The original process communicates that it was in the foreground by
4267     // adding this argument.  This new process, which is taking over for
4268     // the old one, should make itself the active application.
4269     ProcessSerialNumber psn;
4270     if (::GetCurrentProcess(&psn) == noErr) ::SetFrontProcess(&psn);
4271   }
4272 #endif
4273
4274   SaveToEnv("MOZ_LAUNCHED_CHILD=");
4275
4276   // On Windows, the -os-restarted command line switch lets us know when we are
4277   // restarted via RegisterApplicationRestart. May be used for other OSes later.
4278   if (CheckArg("os-restarted", nullptr, CheckArgFlag::RemoveArg) == ARG_FOUND) {
4279     gRestartedByOS = true;
4280   }
4281
4282   gRestartArgc = gArgc;
4283   gRestartArgv =
4284       (char**)malloc(sizeof(char*) * (gArgc + 1 + (override ? 2 : 0)));
4285   if (!gRestartArgv) {
4286     return 1;
4287   }
4288
4289   int i;
4290   for (i = 0; i < gArgc; ++i) {
4291     gRestartArgv[i] = gArgv[i];
4292   }
4293
4294   // Add the -override argument back (it is removed automatically be CheckArg)
4295   // if there is one
4296   if (override) {
4297     gRestartArgv[gRestartArgc++] = const_cast<char*>("-override");
4298     gRestartArgv[gRestartArgc++] = const_cast<char*>(override);
4299   }
4300
4301   gRestartArgv[gRestartArgc] = nullptr;
4302
4303   Maybe<bool> safeModeRequested = IsSafeModeRequested(gArgc, gArgv);
4304   if (!safeModeRequested) {
4305     return 1;
4306   }
4307 #ifdef MOZ_BACKGROUNDTASKS
4308   if (BackgroundTasks::IsBackgroundTaskMode()) {
4309     safeModeRequested = Some(false);
4310
4311     // Remove the --backgroundtask arg now that it has been saved in
4312     // gRestartArgv.
4313     const char* tmpBackgroundTaskName = nullptr;
4314     Unused << CheckArg("backgroundtask", &tmpBackgroundTaskName,
4315                        CheckArgFlag::RemoveArg);
4316   }
4317 #endif
4318
4319   gSafeMode = safeModeRequested.value();
4320
4321   MaybeAddCPUMicrocodeCrashAnnotation();
4322   CrashReporter::RegisterAnnotationBool(CrashReporter::Annotation::SafeMode,
4323                                         &gSafeMode);
4324
4325 #if defined(MOZ_HAS_REMOTE)
4326   // Handle --no-remote and --new-instance command line arguments. Setup
4327   // the environment to better accommodate other components and various
4328   // restart scenarios.
4329   ar = CheckArg("no-remote");
4330   if (ar == ARG_FOUND || EnvHasValue("MOZ_NO_REMOTE")) {
4331     mDisableRemoteClient = true;
4332     mDisableRemoteServer = true;
4333     gRestartWithoutRemote = true;
4334     // We don't want to propagate MOZ_NO_REMOTE to potential child
4335     // process.
4336     SaveToEnv("MOZ_NO_REMOTE=");
4337   }
4338
4339   ar = CheckArg("new-instance");
4340   if (ar == ARG_FOUND || EnvHasValue("MOZ_NEW_INSTANCE")) {
4341     mDisableRemoteClient = true;
4342   }
4343 #else
4344   // These arguments do nothing in platforms with no remoting support but we
4345   // should remove them from the command line anyway.
4346   CheckArg("no-remote");
4347   CheckArg("new-instance");
4348 #endif
4349
4350   ar = CheckArg("offline");
4351   if (ar || EnvHasValue("XRE_START_OFFLINE")) {
4352     mStartOffline = true;
4353   }
4354
4355   // On Windows, to get working console arrangements so help/version/etc
4356   // print something, we need to initialize the native app support.
4357   rv = NS_CreateNativeAppSupport(getter_AddRefs(mNativeApp));
4358   if (NS_FAILED(rv)) return 1;
4359
4360   // Handle --help, --full-version and --version command line arguments.
4361   // They should return quickly, so we deal with them here.
4362   if (CheckArg("h") || CheckArg("help") || CheckArg("?")) {
4363     DumpHelp();
4364     *aExitFlag = true;
4365     return 0;
4366   }
4367
4368   if (CheckArg("v") || CheckArg("version")) {
4369     DumpVersion();
4370     *aExitFlag = true;
4371     return 0;
4372   }
4373
4374   if (CheckArg("full-version")) {
4375     DumpFullVersion();
4376     *aExitFlag = true;
4377     return 0;
4378   }
4379
4380   rv = XRE_InitCommandLine(gArgc, gArgv);
4381   NS_ENSURE_SUCCESS(rv, 1);
4382
4383   return 0;
4384 }
4385
4386 #if defined(XP_LINUX) && !defined(ANDROID)
4387
4388 static void AnnotateLSBRelease(void*) {
4389   nsCString dist, desc, release, codename;
4390   if (widget::lsb::GetLSBRelease(dist, desc, release, codename)) {
4391     CrashReporter::AppendAppNotesToCrashReport(desc);
4392   }
4393 }
4394
4395 #endif  // defined(XP_LINUX) && !defined(ANDROID)
4396
4397 #ifdef XP_WIN
4398 static void ReadAheadSystemDll(const wchar_t* dllName) {
4399   wchar_t dllPath[MAX_PATH];
4400   if (ConstructSystem32Path(dllName, dllPath, MAX_PATH)) {
4401     ReadAheadLib(dllPath);
4402   }
4403 }
4404
4405 static void ReadAheadPackagedDll(const wchar_t* dllName,
4406                                  const wchar_t* aGREDir) {
4407   wchar_t dllPath[MAX_PATH];
4408   swprintf(dllPath, MAX_PATH, L"%s\\%s", aGREDir, dllName);
4409   ReadAheadLib(dllPath);
4410 }
4411
4412 static void PR_CALLBACK ReadAheadDlls_ThreadStart(void* arg) {
4413   UniquePtr<wchar_t[]> greDir(static_cast<wchar_t*>(arg));
4414
4415   // In Bug 1628903, we investigated which DLLs we should prefetch in
4416   // order to reduce disk I/O and improve startup on Windows machines.
4417   // Our ultimate goal is to measure the impact of these improvements on
4418   // retention (see Bug 1640087). Before we place this within a pref,
4419   // we should ensure this feature only ships to the nightly channel
4420   // and monitor results from that subset.
4421   if (greDir) {
4422     // Prefetch the DLLs shipped with firefox
4423     ReadAheadPackagedDll(L"libegl.dll", greDir.get());
4424     ReadAheadPackagedDll(L"libGLESv2.dll", greDir.get());
4425     ReadAheadPackagedDll(L"nssckbi.dll", greDir.get());
4426     ReadAheadPackagedDll(L"freebl3.dll", greDir.get());
4427     ReadAheadPackagedDll(L"softokn3.dll", greDir.get());
4428
4429     // Prefetch the system DLLs
4430     ReadAheadSystemDll(L"DWrite.dll");
4431     ReadAheadSystemDll(L"D3DCompiler_47.dll");
4432   } else {
4433     // Load DataExchange.dll and twinapi.appcore.dll for
4434     // nsWindow::EnableDragDrop
4435     ReadAheadSystemDll(L"DataExchange.dll");
4436     ReadAheadSystemDll(L"twinapi.appcore.dll");
4437
4438     // Load twinapi.dll for WindowsUIUtils::UpdateTabletModeState
4439     ReadAheadSystemDll(L"twinapi.dll");
4440
4441     // Load explorerframe.dll for WinTaskbar::Initialize
4442     ReadAheadSystemDll(L"ExplorerFrame.dll");
4443
4444     // Load WinTypes.dll for nsOSHelperAppService::GetApplicationDescription
4445     ReadAheadSystemDll(L"WinTypes.dll");
4446   }
4447 }
4448 #endif
4449
4450 #if defined(MOZ_UPDATER) && !defined(MOZ_WIDGET_ANDROID)
4451 enum struct ShouldNotProcessUpdatesReason {
4452   DevToolsLaunching,
4453   NotAnUpdatingTask,
4454   OtherInstanceRunning,
4455   FirstStartup
4456 };
4457
4458 const char* ShouldNotProcessUpdatesReasonAsString(
4459     ShouldNotProcessUpdatesReason aReason) {
4460   switch (aReason) {
4461     case ShouldNotProcessUpdatesReason::DevToolsLaunching:
4462       return "DevToolsLaunching";
4463     case ShouldNotProcessUpdatesReason::NotAnUpdatingTask:
4464       return "NotAnUpdatingTask";
4465     case ShouldNotProcessUpdatesReason::OtherInstanceRunning:
4466       return "OtherInstanceRunning";
4467     default:
4468       MOZ_CRASH("impossible value for ShouldNotProcessUpdatesReason");
4469   }
4470 }
4471
4472 Maybe<ShouldNotProcessUpdatesReason> ShouldNotProcessUpdates(
4473     nsXREDirProvider& aDirProvider) {
4474   // Don't process updates when launched from the installer.
4475   // It's possible for a stale update to be present in the case of a paveover;
4476   // ignore it and leave the update service to discard it.
4477   if (ARG_FOUND == CheckArgExists("first-startup")) {
4478     NS_WARNING("ShouldNotProcessUpdates(): FirstStartup");
4479     return Some(ShouldNotProcessUpdatesReason::FirstStartup);
4480   }
4481
4482   // Do not process updates if we're launching devtools, as evidenced by
4483   // "--chrome ..." with the browser toolbox chrome document URL.
4484
4485   // Keep this synchronized with the value of the same name in
4486   // devtools/client/framework/browser-toolbox/Launcher.sys.mjs.  Or, for bonus
4487   // points, lift this value to nsIXulRuntime or similar, so that it can be
4488   // accessed in both locations.  (The prefs service isn't available at this
4489   // point so the simplest manner of sharing the value is not available to us.)
4490   const char* BROWSER_TOOLBOX_WINDOW_URL =
4491       "chrome://devtools/content/framework/browser-toolbox/window.html";
4492
4493   const char* chromeParam = nullptr;
4494   if (ARG_FOUND == CheckArg("chrome", &chromeParam, CheckArgFlag::None)) {
4495     if (!chromeParam || !strcmp(BROWSER_TOOLBOX_WINDOW_URL, chromeParam)) {
4496       NS_WARNING("ShouldNotProcessUpdates(): DevToolsLaunching");
4497       return Some(ShouldNotProcessUpdatesReason::DevToolsLaunching);
4498     }
4499   }
4500
4501 #  ifdef MOZ_BACKGROUNDTASKS
4502   // Do not process updates if we're running a background task mode and another
4503   // instance is already running.  This avoids periodic maintenance updating
4504   // underneath a browsing session.
4505   Maybe<nsCString> backgroundTasks = BackgroundTasks::GetBackgroundTasks();
4506   if (backgroundTasks.isSome()) {
4507     // Only process updates for specific tasks: at this time, the
4508     // `backgroundupdate` task and the test-only `shouldprocessupdates` task.
4509     //
4510     // Background tasks can be sparked by Firefox instances that are shutting
4511     // down, which can cause races between the task startup trying to update and
4512     // Firefox trying to invoke the updater.  This happened when converting
4513     // `pingsender` to a background task, since it is launched to send pings at
4514     // shutdown: Bug 1736373.
4515     //
4516     // We'd prefer to have this be a property of the task definition sibling to
4517     // `backgroundTaskTimeoutSec`, but when we reach this code we're well before
4518     // we can load the task JSM.
4519     if (!BackgroundTasks::IsUpdatingTaskName(backgroundTasks.ref())) {
4520       NS_WARNING("ShouldNotProcessUpdates(): NotAnUpdatingTask");
4521       return Some(ShouldNotProcessUpdatesReason::NotAnUpdatingTask);
4522     }
4523
4524     // At this point we have a dir provider but no XPCOM directory service.  We
4525     // launch the update sync manager using that information so that it doesn't
4526     // need to ask for (and fail to find) the directory service.
4527     nsCOMPtr<nsIFile> anAppFile;
4528     bool persistent;
4529     nsresult rv = aDirProvider.GetFile(XRE_EXECUTABLE_FILE, &persistent,
4530                                        getter_AddRefs(anAppFile));
4531     if (NS_FAILED(rv) || !anAppFile) {
4532       // Strange, but not a reason to skip processing updates.
4533       return Nothing();
4534     }
4535
4536     auto updateSyncManager = new nsUpdateSyncManager(anAppFile);
4537
4538     bool otherInstance = false;
4539     updateSyncManager->IsOtherInstanceRunning(&otherInstance);
4540     if (otherInstance) {
4541       NS_WARNING("ShouldNotProcessUpdates(): OtherInstanceRunning");
4542       return Some(ShouldNotProcessUpdatesReason::OtherInstanceRunning);
4543     }
4544   }
4545 #  endif
4546
4547   return Nothing();
4548 }
4549 #endif
4550
4551 namespace mozilla::startup {
4552 Result<nsCOMPtr<nsIFile>, nsresult> GetIncompleteStartupFile(nsIFile* aProfLD) {
4553   nsCOMPtr<nsIFile> crashFile;
4554   MOZ_TRY(aProfLD->Clone(getter_AddRefs(crashFile)));
4555   MOZ_TRY(crashFile->Append(FILE_STARTUP_INCOMPLETE));
4556   return std::move(crashFile);
4557 }
4558 }  // namespace mozilla::startup
4559
4560 // Check whether the last startup attempt resulted in a crash or hang.
4561 // This is distinct from the definition of a startup crash from
4562 // nsAppStartup::TrackStartupCrashBegin.
4563 bool XREMain::CheckLastStartupWasCrash() {
4564   Result<nsCOMPtr<nsIFile>, nsresult> crashFile =
4565       GetIncompleteStartupFile(mProfLD);
4566   if (crashFile.isErr()) {
4567     return true;
4568   }
4569
4570   // Attempt to create the incomplete startup canary file. If the file already
4571   // exists, this fails, and we know the last startup was a crash. If it
4572   // doesn't already exist, it is created, and will be removed at the end of
4573   // the startup crash detection window.
4574   AutoFDClose fd;
4575   Unused << crashFile.inspect()->OpenNSPRFileDesc(
4576       PR_WRONLY | PR_CREATE_FILE | PR_EXCL, 0666, getter_Transfers(fd));
4577   return !fd;
4578 }
4579
4580 /*
4581  * XRE_mainStartup - Initializes the profile and various other services.
4582  * Main() will exit early if either return value != 0 or if aExitFlag is
4583  * true.
4584  */
4585 int XREMain::XRE_mainStartup(bool* aExitFlag) {
4586   nsresult rv;
4587
4588   if (!aExitFlag) return 1;
4589   *aExitFlag = false;
4590
4591 #ifdef XP_MACOSX
4592   mozilla::MacAutoreleasePool pool;
4593 #endif
4594
4595   // Enable Telemetry IO Reporting on DEBUG, nightly and local builds,
4596   // but disable it on FUZZING builds and for ANDROID.
4597 #ifndef FUZZING
4598 #  ifndef ANDROID
4599 #    ifdef DEBUG
4600   mozilla::Telemetry::InitIOReporting(gAppData->xreDirectory);
4601 #    else
4602   {
4603     const char* releaseChannel = MOZ_STRINGIFY(MOZ_UPDATE_CHANNEL);
4604     if (strcmp(releaseChannel, "nightly") == 0 ||
4605         strcmp(releaseChannel, "default") == 0) {
4606       mozilla::Telemetry::InitIOReporting(gAppData->xreDirectory);
4607     }
4608   }
4609 #    endif /* DEBUG */
4610 #  endif   /* ANDROID */
4611 #endif     /* FUZZING */
4612
4613 #if defined(XP_WIN)
4614   // Enable the HeapEnableTerminationOnCorruption exploit mitigation. We ignore
4615   // the return code because it always returns success, although it has no
4616   // effect on Windows older than XP SP3.
4617   HeapSetInformation(NULL, HeapEnableTerminationOnCorruption, NULL, 0);
4618 #endif /* XP_WIN */
4619
4620 #ifdef MOZ_WIDGET_GTK
4621   // Stash startup token in owned memory because gtk_init will clear
4622   // DESKTOP_STARTUP_ID it.
4623   if (const char* v = PR_GetEnv("DESKTOP_STARTUP_ID")) {
4624     mDesktopStartupID.Assign(v);
4625   }
4626   if (const char* v = PR_GetEnv("XDG_ACTIVATION_TOKEN")) {
4627     mXDGActivationToken.Assign(v);
4628   }
4629 #endif
4630
4631 #if defined(XP_WIN)
4632   {
4633     // Save the shortcut path before lpTitle is replaced by an AUMID,
4634     // such as by WinTaskbar
4635     STARTUPINFOW si;
4636     GetStartupInfoW(&si);
4637     if (si.dwFlags & STARTF_TITLEISAPPID) {
4638       NS_WARNING("AUMID was already set, shortcut may have been lost.");
4639     } else if ((si.dwFlags & STARTF_TITLEISLINKNAME) && si.lpTitle) {
4640       gProcessStartupShortcut.Assign(si.lpTitle);
4641     }
4642   }
4643 #endif /* XP_WIN */
4644
4645 #if defined(MOZ_WIDGET_GTK)
4646   // setup for private colormap.  Ideally we'd like to do this
4647   // in nsAppShell::Create, but we need to get in before gtk
4648   // has been initialized to make sure everything is running
4649   // consistently.
4650
4651   // Set program name to the one defined in application.ini.
4652   g_set_prgname(gAppData->remotingName);
4653
4654   // Initialize GTK here for splash.
4655
4656 #  if defined(MOZ_WIDGET_GTK) && defined(MOZ_X11)
4657   // Disable XInput2 multidevice support due to focus bugginess.
4658   // See bugs 1182700, 1170342.
4659   // gdk_disable_multidevice() affects Gdk X11 backend only,
4660   // the multidevice support is always enabled on Wayland backend.
4661   const char* useXI2 = PR_GetEnv("MOZ_USE_XINPUT2");
4662   if (!useXI2 || (*useXI2 == '0')) gdk_disable_multidevice();
4663 #  endif
4664
4665   // Open the display ourselves instead of using gtk_init, so that we can
4666   // close it without fear that one day gtk might clean up the display it
4667   // opens.
4668   if (!gtk_parse_args(&gArgc, &gArgv)) return 1;
4669 #endif /* MOZ_WIDGET_GTK */
4670
4671 #ifdef FUZZING
4672   if (PR_GetEnv("FUZZER")) {
4673     *aExitFlag = true;
4674     return mozilla::fuzzerRunner->Run(&gArgc, &gArgv);
4675   }
4676 #endif
4677
4678   if (PR_GetEnv("MOZ_RUN_GTEST")) {
4679     int result;
4680 #ifdef XP_WIN
4681     UseParentConsole();
4682 #endif
4683     // RunGTest will only be set if we're in xul-unit
4684     if (mozilla::RunGTest) {
4685       gIsGtest = true;
4686       result = mozilla::RunGTest(&gArgc, gArgv);
4687       gIsGtest = false;
4688     } else {
4689       result = 1;
4690       printf("TEST-UNEXPECTED-FAIL | gtest | Not compiled with enable-tests\n");
4691     }
4692     *aExitFlag = true;
4693     return result;
4694   }
4695
4696   bool isBackgroundTaskMode = false;
4697 #ifdef MOZ_BACKGROUNDTASKS
4698   isBackgroundTaskMode = BackgroundTasks::IsBackgroundTaskMode();
4699 #endif
4700
4701 #ifdef MOZ_HAS_REMOTE
4702   if (gfxPlatform::IsHeadless()) {
4703     mDisableRemoteClient = true;
4704     mDisableRemoteServer = true;
4705   }
4706 #endif
4707
4708 #ifdef MOZ_X11
4709   // Init X11 in thread-safe mode. Must be called prior to the first call to
4710   // XOpenDisplay (called inside gdk_display_open). This is a requirement for
4711   // off main tread compositing.
4712   if (!isBackgroundTaskMode && !gfxPlatform::IsHeadless()) {
4713     XInitThreads();
4714   }
4715 #endif
4716 #if defined(MOZ_WIDGET_GTK)
4717   if (!isBackgroundTaskMode && !gfxPlatform::IsHeadless()) {
4718     const char* display_name = nullptr;
4719     bool saveDisplayArg = false;
4720
4721     // display_name is owned by gdk.
4722     display_name = gdk_get_display_arg_name();
4723     bool waylandEnabled = IsWaylandEnabled();
4724 #  ifdef MOZ_WAYLAND
4725     if (!display_name) {
4726       auto* proxyEnv = getenv("MOZ_DISABLE_WAYLAND_PROXY");
4727       bool disableWaylandProxy = proxyEnv && *proxyEnv;
4728       if (!disableWaylandProxy && XRE_IsParentProcess() && waylandEnabled) {
4729 #    ifdef MOZ_LOGGING
4730         if (MOZ_LOG_TEST(gWidgetWaylandLog, mozilla::LogLevel::Debug)) {
4731           WaylandProxy::SetVerbose(true);
4732         }
4733 #    endif
4734         gWaylandProxy = WaylandProxy::Create();
4735         if (gWaylandProxy) {
4736           gWaylandProxy->RunThread();
4737         }
4738       }
4739     }
4740 #  endif
4741
4742     // if --display argument is given make sure it's
4743     // also passed to ContentChild::Init() by MOZ_GDK_DISPLAY.
4744     if (display_name) {
4745       SaveWordToEnv("MOZ_GDK_DISPLAY", nsDependentCString(display_name));
4746       saveDisplayArg = true;
4747     }
4748
4749     // On Wayland disabled builds read X11 DISPLAY env exclusively
4750     // and don't care about different displays.
4751     if (!waylandEnabled && !display_name) {
4752       display_name = PR_GetEnv("DISPLAY");
4753       if (!display_name) {
4754         PR_fprintf(PR_STDERR,
4755                    "Error: no DISPLAY environment variable specified\n");
4756         return 1;
4757       }
4758     }
4759
4760     if (display_name) {
4761       GdkDisplay* disp = gdk_display_open(display_name);
4762       if (!disp) {
4763         PR_fprintf(PR_STDERR, "Error: cannot open display: %s\n", display_name);
4764         return 1;
4765       }
4766       if (saveDisplayArg) {
4767         if (GdkIsX11Display(disp)) {
4768           SaveWordToEnv("DISPLAY", nsDependentCString(display_name));
4769         } else if (GdkIsWaylandDisplay(disp)) {
4770           SaveWordToEnv("WAYLAND_DISPLAY", nsDependentCString(display_name));
4771         }
4772       }
4773     } else {
4774       gdk_display_manager_open_display(gdk_display_manager_get(), nullptr);
4775     }
4776 #  if defined(MOZ_WAYLAND)
4777     // We want to use proxy for main connection only so
4778     // restore original Wayland display for next potential Wayland connections
4779     // from gfx probe code and so on.
4780     if (gWaylandProxy) {
4781       gWaylandProxy->RestoreWaylandDisplay();
4782     }
4783     if (waylandEnabled && PR_GetEnv("WAYLAND_DISPLAY") && GdkIsX11Display()) {
4784       // Gtk somehow switched to X11 display but we want Wayland.
4785       // It may happen if compositor response is missig or it's slow
4786       // or WAYLAND_DISPLAY is wrong. In such case throw warning but
4787       // run with X11.
4788       Output(true,
4789              "Error: Failed to open Wayland display, fallback to X11. "
4790              "WAYLAND_DISPLAY='%s' DISPLAY='%s'\n",
4791              PR_GetEnv("WAYLAND_DISPLAY"), PR_GetEnv("DISPLAY"));
4792
4793       // We need to unset WAYLAND_DISPLAY. Gfx probe code doesn't have fallback
4794       // to X11 and we'll end with Browser running SW rendering only then.
4795       g_unsetenv("WAYLAND_DISPLAY");
4796       gWaylandProxy = nullptr;
4797     }
4798 #  endif
4799     if (!gdk_display_get_default()) {
4800       Output(true,
4801              "Error: we don't have any display, WAYLAND_DISPLAY='%s' "
4802              "DISPLAY='%s'\n",
4803              PR_GetEnv("WAYLAND_DISPLAY"), PR_GetEnv("DISPLAY"));
4804       return 1;
4805     }
4806     // Check that Wayland only and X11 only builds
4807     // use appropriate displays.
4808 #  if defined(MOZ_WAYLAND) && !defined(MOZ_X11)
4809     if (!GdkIsWaylandDisplay()) {
4810       Output(true, "Wayland only build is missig Wayland display!\n");
4811       return 1;
4812     }
4813 #  endif
4814 #  if !defined(MOZ_WAYLAND) && defined(MOZ_X11)
4815     if (!GdkIsX11Display()) {
4816       Output(true, "X11 only build is missig X11 display!\n");
4817       return 1;
4818     }
4819 #  endif
4820   }
4821 #endif
4822 #if defined(MOZ_HAS_REMOTE)
4823   // handle --remote now that xpcom is fired up
4824   mRemoteService = new nsRemoteService(gAppData->remotingName);
4825   if (mRemoteService && !mDisableRemoteServer) {
4826     mRemoteService->LockStartup();
4827     gRemoteService = mRemoteService;
4828   }
4829 #endif
4830 #if defined(MOZ_WIDGET_GTK)
4831   g_set_application_name(mAppData->name);
4832
4833 #endif /* defined(MOZ_WIDGET_GTK) */
4834 #ifdef MOZ_X11
4835   // Do this after initializing GDK, or GDK will install its own handler.
4836   XRE_InstallX11ErrorHandler();
4837 #endif
4838
4839   // Call the code to install our handler
4840 #ifdef MOZ_JPROF
4841   setupProfilingStuff();
4842 #endif
4843
4844   bool canRun = false;
4845   rv = mNativeApp->Start(&canRun);
4846   if (NS_FAILED(rv) || !canRun) {
4847     return 1;
4848   }
4849
4850 #ifdef MOZ_WIDGET_GTK
4851   // startup token might be cleared now, we recover it in case we need a
4852   // restart.
4853   if (!mDesktopStartupID.IsEmpty()) {
4854     // Leak it with extreme prejudice!
4855     PR_SetEnv(ToNewCString("DESKTOP_STARTUP_ID="_ns + mDesktopStartupID));
4856   }
4857
4858   if (!mXDGActivationToken.IsEmpty()) {
4859     // Leak it with extreme prejudice!
4860     PR_SetEnv(ToNewCString("XDG_ACTIVATION_TOKEN="_ns + mXDGActivationToken));
4861   }
4862 #endif
4863
4864   // Support exiting early for testing startup sequence. Bug 1360493
4865   if (CheckArg("test-launch-without-hang")) {
4866     *aExitFlag = true;
4867     return 0;
4868   }
4869
4870   mProfileSvc = NS_GetToolkitProfileService();
4871   if (!mProfileSvc) {
4872     // We failed to choose or create profile - notify user and quit
4873     ProfileMissingDialog(mNativeApp);
4874     return 1;
4875   }
4876
4877   bool wasDefaultSelection;
4878   nsCOMPtr<nsIToolkitProfile> profile;
4879   rv = SelectProfile(mProfileSvc, mNativeApp, getter_AddRefs(mProfD),
4880                      getter_AddRefs(mProfLD), getter_AddRefs(profile),
4881                      &wasDefaultSelection);
4882   if (rv == NS_ERROR_LAUNCHED_CHILD_PROCESS || rv == NS_ERROR_ABORT) {
4883     *aExitFlag = true;
4884     return 0;
4885   }
4886
4887   if (NS_FAILED(rv)) {
4888     // We failed to choose or create profile - notify user and quit
4889     ProfileMissingDialog(mNativeApp);
4890     return 1;
4891   }
4892
4893 #if defined(MOZ_HAS_REMOTE)
4894   if (mRemoteService) {
4895     // We want a unique profile name to identify the remote instance.
4896     nsCString profileName;
4897     if (profile) {
4898       rv = profile->GetName(profileName);
4899     }
4900     if (!profile || NS_FAILED(rv) || profileName.IsEmpty()) {
4901       // Couldn't get a name from the profile. Use the directory name?
4902       nsString leafName;
4903       rv = mProfD->GetLeafName(leafName);
4904       if (NS_SUCCEEDED(rv)) {
4905         CopyUTF16toUTF8(leafName, profileName);
4906       }
4907     }
4908
4909     mRemoteService->SetProfile(profileName);
4910
4911     if (!mDisableRemoteClient) {
4912       // Try to remote the entire command line. If this fails, start up
4913       // normally.
4914 #  ifdef MOZ_WIDGET_GTK
4915       const auto& startupToken =
4916           GdkIsWaylandDisplay() ? mXDGActivationToken : mDesktopStartupID;
4917 #  else
4918       const nsCString startupToken;
4919 #  endif
4920       RemoteResult rr = mRemoteService->StartClient(
4921           startupToken.IsEmpty() ? nullptr : startupToken.get());
4922       if (rr == REMOTE_FOUND) {
4923         *aExitFlag = true;
4924         mRemoteService->UnlockStartup();
4925         return 0;
4926       }
4927       if (rr == REMOTE_ARG_BAD) {
4928         mRemoteService->UnlockStartup();
4929         return 1;
4930       }
4931     }
4932   }
4933 #endif
4934
4935 #if defined(MOZ_UPDATER) && !defined(MOZ_WIDGET_ANDROID)
4936 #  ifdef XP_WIN
4937   {
4938     // When automatically restarting for a staged background update
4939     // we want the child process to wait here so that the updater
4940     // does not register two instances running and use that as a
4941     // reason to not process updates. This function requires having
4942     // -restart-pid <param> in the command line to function properly.
4943     // Ensure we keep -restart-pid if we are running tests
4944     if (ARG_FOUND == CheckArgExists("restart-pid") &&
4945         !CheckArg("test-only-automatic-restart-no-wait")) {
4946       // We're not testing and can safely remove it now and read the pid.
4947       const char* restartPidString = nullptr;
4948       CheckArg("restart-pid", &restartPidString, CheckArgFlag::RemoveArg);
4949       // pid should be first parameter following -restart-pid.
4950       uint32_t pid = nsDependentCString(restartPidString).ToInteger(&rv, 10U);
4951       if (NS_SUCCEEDED(rv) && pid > 0) {
4952         printf_stderr(
4953             "*** MaybeWaitForProcessExit: launched pidDWORD = %u ***\n", pid);
4954         RefPtr<nsUpdateProcessor> updater = new nsUpdateProcessor();
4955         if (NS_FAILED(
4956                 updater->WaitForProcessExit(pid, MAYBE_WAIT_TIMEOUT_MS))) {
4957           NS_WARNING("Failed to MaybeWaitForProcessExit.");
4958         }
4959       } else {
4960         NS_WARNING("Failed to parse pid from -restart-pid.");
4961       }
4962     }
4963   }
4964 #  endif
4965   Maybe<ShouldNotProcessUpdatesReason> shouldNotProcessUpdatesReason =
4966       ShouldNotProcessUpdates(mDirProvider);
4967   if (shouldNotProcessUpdatesReason.isNothing()) {
4968     // Check for and process any available updates
4969     nsCOMPtr<nsIFile> updRoot;
4970     bool persistent;
4971     rv = mDirProvider.GetFile(XRE_UPDATE_ROOT_DIR, &persistent,
4972                               getter_AddRefs(updRoot));
4973     // XRE_UPDATE_ROOT_DIR may fail. Fallback to appDir if failed
4974     if (NS_FAILED(rv)) {
4975       updRoot = mDirProvider.GetAppDir();
4976     }
4977
4978     // If the MOZ_TEST_PROCESS_UPDATES environment variable already exists, then
4979     // we are being called from the callback application.
4980     if (EnvHasValue("MOZ_TEST_PROCESS_UPDATES")) {
4981       // If the caller has asked us to log our arguments, do so.  This is used
4982       // to make sure that the maintenance service successfully launches the
4983       // callback application.
4984       const char* logFile = nullptr;
4985       if (ARG_FOUND == CheckArg("dump-args", &logFile)) {
4986         FILE* logFP = fopen(logFile, "wb");
4987         if (logFP) {
4988           for (int i = 1; i < gRestartArgc; ++i) {
4989             fprintf(logFP, "%s\n", gRestartArgv[i]);
4990           }
4991           fclose(logFP);
4992         }
4993       }
4994       *aExitFlag = true;
4995       return 0;
4996     }
4997
4998     // Support for processing an update and exiting. The
4999     // MOZ_TEST_PROCESS_UPDATES environment variable will be part of the
5000     // updater's environment and the application that is relaunched by the
5001     // updater. When the application is relaunched by the updater it will be
5002     // removed below and the application will exit.
5003     if (CheckArg("test-process-updates")) {
5004       SaveToEnv("MOZ_TEST_PROCESS_UPDATES=1");
5005     }
5006     nsCOMPtr<nsIFile> exeFile, exeDir;
5007     rv = mDirProvider.GetFile(XRE_EXECUTABLE_FILE, &persistent,
5008                               getter_AddRefs(exeFile));
5009     NS_ENSURE_SUCCESS(rv, 1);
5010     rv = exeFile->GetParent(getter_AddRefs(exeDir));
5011     NS_ENSURE_SUCCESS(rv, 1);
5012     ProcessUpdates(mDirProvider.GetGREDir(), exeDir, updRoot, gRestartArgc,
5013                    gRestartArgv, mAppData->version);
5014     if (EnvHasValue("MOZ_TEST_PROCESS_UPDATES")) {
5015       SaveToEnv("MOZ_TEST_PROCESS_UPDATES=");
5016       *aExitFlag = true;
5017       return 0;
5018     }
5019   } else {
5020     if (CheckArg("test-process-updates") ||
5021         EnvHasValue("MOZ_TEST_PROCESS_UPDATES")) {
5022       // Support for testing *not* processing an update.  The launched process
5023       // can witness this environment variable and conclude that its runtime
5024       // environment resulted in not processing updates.
5025
5026       SaveToEnv(nsPrintfCString(
5027                     "MOZ_TEST_PROCESS_UPDATES=ShouldNotProcessUpdates(): %s",
5028                     ShouldNotProcessUpdatesReasonAsString(
5029                         shouldNotProcessUpdatesReason.value()))
5030                     .get());
5031     }
5032   }
5033 #endif
5034
5035   // We now know there is no existing instance using the selected profile. If
5036   // the profile wasn't selected by specific command line arguments and the
5037   // user has chosen to show the profile manager on startup then do that.
5038   if (wasDefaultSelection) {
5039     bool useSelectedProfile;
5040     rv = mProfileSvc->GetStartWithLastProfile(&useSelectedProfile);
5041     NS_ENSURE_SUCCESS(rv, 1);
5042
5043     if (!useSelectedProfile) {
5044       rv = ShowProfileManager(mProfileSvc, mNativeApp);
5045       if (rv == NS_ERROR_LAUNCHED_CHILD_PROCESS || rv == NS_ERROR_ABORT) {
5046         *aExitFlag = true;
5047         return 0;
5048       }
5049       if (NS_FAILED(rv)) {
5050         return 1;
5051       }
5052     }
5053   }
5054
5055   // We always want to lock the profile even if we're actually going to reset
5056   // it later.
5057   rv = LockProfile(mNativeApp, mProfD, mProfLD, profile,
5058                    getter_AddRefs(mProfileLock));
5059   if (rv == NS_ERROR_LAUNCHED_CHILD_PROCESS || rv == NS_ERROR_ABORT) {
5060     *aExitFlag = true;
5061     return 0;
5062   } else if (NS_FAILED(rv)) {
5063     return 1;
5064   }
5065
5066   if (gDoProfileReset) {
5067     if (EnvHasValue("MOZ_RESET_PROFILE_RESTART")) {
5068       SaveToEnv("MOZ_RESET_PROFILE_RESTART=");
5069       // We only want to restore the previous session if the profile refresh was
5070       // triggered by user. And if it was a user-triggered profile refresh
5071       // through, say, the safeMode dialog or the troubleshooting page, the
5072       // MOZ_RESET_PROFILE_RESTART env variable would be set. Hence we set
5073       // MOZ_RESET_PROFILE_MIGRATE_SESSION here so that Firefox profile migrator
5074       // would migrate old session data later.
5075       SaveToEnv("MOZ_RESET_PROFILE_MIGRATE_SESSION=1");
5076     }
5077     // Unlock the source profile.
5078     mProfileLock->Unlock();
5079
5080     // If we're resetting a profile, create a new one and use it to startup.
5081     gResetOldProfile = profile;
5082     rv = mProfileSvc->CreateResetProfile(getter_AddRefs(profile));
5083     if (NS_SUCCEEDED(rv)) {
5084       rv = profile->GetRootDir(getter_AddRefs(mProfD));
5085       NS_ENSURE_SUCCESS(rv, 1);
5086       SaveFileToEnv("XRE_PROFILE_PATH", mProfD);
5087
5088       rv = profile->GetLocalDir(getter_AddRefs(mProfLD));
5089       NS_ENSURE_SUCCESS(rv, 1);
5090       SaveFileToEnv("XRE_PROFILE_LOCAL_PATH", mProfLD);
5091
5092       // Lock the new profile
5093       rv = LockProfile(mNativeApp, mProfD, mProfLD, profile,
5094                        getter_AddRefs(mProfileLock));
5095       if (rv == NS_ERROR_LAUNCHED_CHILD_PROCESS || rv == NS_ERROR_ABORT) {
5096         *aExitFlag = true;
5097         return 0;
5098       } else if (NS_FAILED(rv)) {
5099         return 1;
5100       }
5101     } else {
5102       NS_WARNING("Profile reset failed.");
5103       return 1;
5104     }
5105   }
5106
5107   gProfileLock = mProfileLock;
5108
5109   nsAutoCString version;
5110   BuildVersion(version);
5111
5112 #ifdef TARGET_OS_ABI
5113   constexpr auto osABI = nsLiteralCString{TARGET_OS_ABI};
5114 #else
5115   // No TARGET_XPCOM_ABI, but at least the OS is known
5116   constexpr auto osABI = nsLiteralCString{OS_TARGET "_UNKNOWN"};
5117 #endif
5118
5119   // Check for version compatibility with the last version of the app this
5120   // profile was started with.  The format of the version stamp is defined
5121   // by the BuildVersion function.
5122   // Also check to see if something has happened to invalidate our
5123   // fastload caches, like an app upgrade.
5124
5125   // If we see .purgecaches, that means someone did a make.
5126   // Re-register components to catch potential changes.
5127   nsCOMPtr<nsIFile> flagFile;
5128   if (mAppData->directory) {
5129     Unused << mAppData->directory->Clone(getter_AddRefs(flagFile));
5130   }
5131   if (flagFile) {
5132     flagFile->AppendNative(FILE_INVALIDATE_CACHES);
5133   }
5134
5135   bool cachesOK;
5136   bool isDowngrade;
5137   nsCString lastVersion;
5138   bool versionOK = CheckCompatibility(
5139       mProfD, version, osABI, mDirProvider.GetGREDir(), mAppData->directory,
5140       flagFile, &cachesOK, &isDowngrade, lastVersion);
5141
5142   MOZ_RELEASE_ASSERT(!cachesOK || lastVersion.Equals(version),
5143                      "Caches cannot be good if the version has changed.");
5144
5145 #ifdef MOZ_BLOCK_PROFILE_DOWNGRADE
5146   // The argument check must come first so the argument is always removed from
5147   // the command line regardless of whether this is a downgrade or not.
5148   if (!CheckArg("allow-downgrade") && isDowngrade &&
5149       !EnvHasValue("MOZ_ALLOW_DOWNGRADE")) {
5150     rv = CheckDowngrade(mProfD, mNativeApp, mProfileSvc, lastVersion);
5151     if (rv == NS_ERROR_LAUNCHED_CHILD_PROCESS || rv == NS_ERROR_ABORT) {
5152       *aExitFlag = true;
5153       return 0;
5154     }
5155   }
5156 #endif
5157
5158   rv = mDirProvider.SetProfile(mProfD, mProfLD);
5159   NS_ENSURE_SUCCESS(rv, 1);
5160
5161   //////////////////////// NOW WE HAVE A PROFILE ////////////////////////
5162
5163   mozilla::Telemetry::SetProfileDir(mProfD);
5164
5165   if (mAppData->flags & NS_XRE_ENABLE_CRASH_REPORTER) {
5166     MakeOrSetMinidumpPath(mProfD);
5167   }
5168
5169   CrashReporter::SetProfileDirectory(mProfD);
5170
5171 #ifdef MOZ_ASAN_REPORTER
5172   // In ASan reporter builds, we need to set ASan's log_path as early as
5173   // possible, so it dumps its errors into files there instead of using
5174   // the default stderr location. Since this is crucial for ASan reporter
5175   // to work at all (and we don't want people to use a non-functional
5176   // ASan reporter build), all failures while setting log_path are fatal.
5177   setASanReporterPath(mProfD);
5178
5179   // Export to env for child processes
5180   SaveFileToEnv("ASAN_REPORTER_PATH", mProfD);
5181 #endif
5182
5183   bool lastStartupWasCrash = CheckLastStartupWasCrash();
5184
5185   CrashReporter::RecordAnnotationBool(
5186       CrashReporter::Annotation::LastStartupWasCrash, lastStartupWasCrash);
5187
5188   if (CheckArg("purgecaches") || PR_GetEnv("MOZ_PURGE_CACHES") ||
5189       lastStartupWasCrash || gSafeMode) {
5190     cachesOK = false;
5191   }
5192
5193   CrashReporter::RecordAnnotationBool(
5194       CrashReporter::Annotation::StartupCacheValid, cachesOK && versionOK);
5195
5196   // Every time a profile is loaded by a build with a different version,
5197   // it updates the compatibility.ini file saying what version last wrote
5198   // the fastload caches.  On subsequent launches if the version matches,
5199   // there is no need for re-registration.  If the user loads the same
5200   // profile in different builds the component registry must be
5201   // re-generated to prevent mysterious component loading failures.
5202   //
5203   bool startupCacheValid = true;
5204
5205   if (!cachesOK || !versionOK) {
5206     QuotaManager::InvalidateQuotaCache();
5207
5208     startupCacheValid = RemoveComponentRegistries(mProfD, mProfLD, false);
5209
5210     // Rewrite compatibility.ini to match the current build. The next run
5211     // should attempt to invalidate the caches if either this run is safe mode
5212     // or the attempt to invalidate the caches this time failed.
5213     WriteVersion(mProfD, version, osABI, mDirProvider.GetGREDir(),
5214                  mAppData->directory, gSafeMode || !startupCacheValid);
5215   }
5216
5217   if (!startupCacheValid) StartupCache::IgnoreDiskCache();
5218
5219   if (flagFile) {
5220     flagFile->Remove(true);
5221   }
5222
5223   // Flush any pending page load events.
5224   mozilla::glean_pings::Pageload.Submit("startup"_ns);
5225
5226   if (!isBackgroundTaskMode) {
5227 #ifdef USE_GLX_TEST
5228     GfxInfo::FireGLXTestProcess();
5229 #endif
5230 #ifdef MOZ_WAYLAND
5231     // Make sure we have wayland connection for main thread.
5232     // It's used as template to create display connections
5233     // for different threads.
5234     if (IsWaylandEnabled()) {
5235       MOZ_UNUSED(WaylandDisplayGet());
5236     }
5237 #endif
5238 #ifdef MOZ_WIDGET_GTK
5239     nsAppShell::InstallTermSignalHandler();
5240 #endif
5241   }
5242
5243   return 0;
5244 }
5245
5246 #if defined(MOZ_SANDBOX)
5247 void AddSandboxAnnotations() {
5248   CrashReporter::RecordAnnotationU32(
5249       CrashReporter::Annotation::ContentSandboxLevel,
5250       GetEffectiveContentSandboxLevel());
5251   CrashReporter::RecordAnnotationU32(CrashReporter::Annotation::GpuSandboxLevel,
5252                                      GetEffectiveGpuSandboxLevel());
5253
5254   // Include whether or not this instance is capable of content sandboxing
5255   bool sSandboxCapable = false;
5256
5257 #  if defined(XP_WIN)
5258   // All supported Windows versions support some level of content sandboxing
5259   sSandboxCapable = true;
5260 #  elif defined(XP_MACOSX)
5261   // All supported OS X versions are capable
5262   sSandboxCapable = true;
5263 #  elif defined(XP_LINUX)
5264   sSandboxCapable = SandboxInfo::Get().CanSandboxContent();
5265 #  elif defined(__OpenBSD__)
5266   sSandboxCapable = true;
5267   StartOpenBSDSandbox(GeckoProcessType_Default);
5268 #  endif
5269
5270   CrashReporter::RecordAnnotationBool(
5271       CrashReporter::Annotation::ContentSandboxCapable, sSandboxCapable);
5272 }
5273 #endif /* MOZ_SANDBOX */
5274
5275 /*
5276  * XRE_mainRun - Command line startup, profile migration, and
5277  * the calling of appStartup->Run().
5278  */
5279 nsresult XREMain::XRE_mainRun() {
5280   nsresult rv = NS_OK;
5281   NS_ASSERTION(mScopedXPCOM, "Scoped xpcom not initialized.");
5282
5283 #if defined(XP_WIN)
5284   RefPtr<mozilla::DllServices> dllServices(mozilla::DllServices::Get());
5285   dllServices->StartUntrustedModulesProcessor(false);
5286   auto dllServicesDisable =
5287       MakeScopeExit([&dllServices]() { dllServices->DisableFull(); });
5288
5289   mozilla::mscom::InitProfilerMarkers();
5290 #endif  // defined(XP_WIN)
5291
5292   // We need the appStartup pointer to span multiple scopes, so we declare
5293   // it here.
5294   nsCOMPtr<nsIAppStartup> appStartup;
5295   // Ditto with the command line.
5296   nsCOMPtr<nsICommandLineRunner> cmdLine;
5297
5298   {
5299 #ifdef XP_MACOSX
5300     // In this scope, create an autorelease pool that will leave scope with
5301     // it just before entering our event loop.
5302     mozilla::MacAutoreleasePool pool;
5303 #endif
5304
5305     rv = mScopedXPCOM->SetWindowCreator(mNativeApp);
5306     NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
5307
5308     // tell the crash reporter to also send the release channel
5309     nsCOMPtr<nsIPrefService> prefs =
5310         do_GetService("@mozilla.org/preferences-service;1", &rv);
5311     if (NS_SUCCEEDED(rv)) {
5312       nsCOMPtr<nsIPrefBranch> defaultPrefBranch;
5313       rv = prefs->GetDefaultBranch(nullptr, getter_AddRefs(defaultPrefBranch));
5314
5315       if (NS_SUCCEEDED(rv)) {
5316         nsAutoCString sval;
5317         rv = defaultPrefBranch->GetCharPref("app.update.channel", sval);
5318         if (NS_SUCCEEDED(rv)) {
5319           CrashReporter::RecordAnnotationNSCString(
5320               CrashReporter::Annotation::ReleaseChannel, sval);
5321         }
5322       }
5323     }
5324     // Needs to be set after xpcom initialization.
5325     bool includeContextHeap = Preferences::GetBool(
5326         "toolkit.crashreporter.include_context_heap", false);
5327     CrashReporter::SetIncludeContextHeap(includeContextHeap);
5328
5329 #if defined(XP_LINUX) && !defined(ANDROID)
5330     PR_CreateThread(PR_USER_THREAD, AnnotateLSBRelease, 0, PR_PRIORITY_LOW,
5331                     PR_GLOBAL_THREAD, PR_UNJOINABLE_THREAD, 0);
5332 #endif
5333
5334     if (mStartOffline) {
5335       nsCOMPtr<nsIIOService> io(
5336           do_GetService("@mozilla.org/network/io-service;1"));
5337       NS_ENSURE_TRUE(io, NS_ERROR_FAILURE);
5338       io->SetManageOfflineStatus(false);
5339       io->SetOffline(true);
5340     }
5341
5342 #ifdef XP_WIN
5343     mozilla::DllPrefetchExperimentRegistryInfo prefetchRegInfo;
5344     mozilla::AlteredDllPrefetchMode dllPrefetchMode =
5345         prefetchRegInfo.GetAlteredDllPrefetchMode();
5346
5347     if (!PR_GetEnv("XRE_NO_DLL_READAHEAD") &&
5348         dllPrefetchMode != mozilla::AlteredDllPrefetchMode::NoPrefetch) {
5349       nsCOMPtr<nsIFile> greDir = mDirProvider.GetGREDir();
5350       nsAutoString path;
5351       rv = greDir->GetPath(path);
5352       if (NS_SUCCEEDED(rv)) {
5353         PRThread* readAheadThread;
5354         wchar_t* pathRaw;
5355
5356         // We use the presence of a path argument inside the thread to determine
5357         // which list of Dlls to use. The old list does not need access to the
5358         // GRE dir, so the path argument is set to a null pointer.
5359         if (dllPrefetchMode ==
5360             mozilla::AlteredDllPrefetchMode::OptimizedPrefetch) {
5361           pathRaw = new wchar_t[MAX_PATH];
5362           wcscpy_s(pathRaw, MAX_PATH, path.get());
5363         } else {
5364           pathRaw = nullptr;
5365         }
5366         readAheadThread = PR_CreateThread(
5367             PR_USER_THREAD, ReadAheadDlls_ThreadStart, (void*)pathRaw,
5368             PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD, PR_UNJOINABLE_THREAD, 0);
5369         if (readAheadThread == NULL) {
5370           delete[] pathRaw;
5371         }
5372       }
5373     }
5374 #endif
5375
5376     if (gDoMigration) {
5377       nsCOMPtr<nsIFile> file;
5378       mDirProvider.GetAppDir()->Clone(getter_AddRefs(file));
5379       file->AppendNative("override.ini"_ns);
5380       nsINIParser parser;
5381       nsresult rv = parser.Init(file);
5382       // if override.ini doesn't exist, also check for distribution.ini
5383       if (NS_FAILED(rv)) {
5384         bool persistent;
5385         mDirProvider.GetFile(XRE_APP_DISTRIBUTION_DIR, &persistent,
5386                              getter_AddRefs(file));
5387         file->AppendNative("distribution.ini"_ns);
5388         rv = parser.Init(file);
5389       }
5390       if (NS_SUCCEEDED(rv)) {
5391         nsAutoCString buf;
5392         rv = parser.GetString("XRE", "EnableProfileMigrator", buf);
5393         if (NS_SUCCEEDED(rv)) {
5394           if (buf[0] == '0' || buf[0] == 'f' || buf[0] == 'F') {
5395             gDoMigration = false;
5396           }
5397         }
5398       }
5399     }
5400
5401     // We'd like to initialize the JSContext *after* reading the user prefs.
5402     // Unfortunately that's not possible if we have to do profile migration
5403     // because that requires us to execute JS before reading user prefs.
5404     // Restarting the browser after profile migration would fix this. See
5405     // bug 1592523.
5406     bool initializedJSContext = false;
5407
5408     {
5409       // Profile Migration
5410       if (mAppData->flags & NS_XRE_ENABLE_PROFILE_MIGRATOR && gDoMigration) {
5411         gDoMigration = false;
5412
5413         xpc::InitializeJSContext();
5414         initializedJSContext = true;
5415
5416         nsCOMPtr<nsIProfileMigrator> pm(
5417             do_CreateInstance(NS_PROFILEMIGRATOR_CONTRACTID));
5418         if (pm) {
5419           nsAutoCString aKey;
5420           nsAutoCString aName;
5421           if (gDoProfileReset) {
5422             // Automatically migrate from the current application if we just
5423             // reset the profile.
5424             aKey = MOZ_APP_NAME;
5425             gResetOldProfile->GetName(aName);
5426           }
5427 #ifdef XP_MACOSX
5428           // Necessary for migration wizard to be accessible.
5429           InitializeMacApp();
5430 #endif
5431           pm->Migrate(&mDirProvider, aKey, aName);
5432         }
5433       }
5434
5435       if (gDoProfileReset) {
5436         if (!initializedJSContext) {
5437           xpc::InitializeJSContext();
5438           initializedJSContext = true;
5439         }
5440
5441         nsresult backupCreated =
5442             ProfileResetCleanup(mProfileSvc, gResetOldProfile);
5443         if (NS_FAILED(backupCreated)) {
5444           NS_WARNING("Could not cleanup the profile that was reset");
5445         }
5446       }
5447     }
5448
5449     // Initialize user preferences before notifying startup observers so they're
5450     // ready in time for early consumers, such as the component loader.
5451     mDirProvider.InitializeUserPrefs();
5452
5453     // Now that all (user) prefs have been loaded we can initialize the main
5454     // thread's JSContext.
5455     if (!initializedJSContext) {
5456       xpc::InitializeJSContext();
5457     }
5458
5459     // Finally, now that JS has been initialized, we can finish pref loading.
5460     // This needs to happen after JS and XPConnect initialization because
5461     // AutoConfig files require JS execution. Note that this means AutoConfig
5462     // files can't override JS engine start-up prefs.
5463     mDirProvider.FinishInitializingUserPrefs();
5464
5465 #if defined(MOZ_SANDBOX) && defined(XP_WIN)
5466     // Now that we have preferences and the directory provider, we can
5467     // finish initializing SandboxBroker. This must happen before the GFX
5468     // platform is initialized (which will launch the GPU process), which
5469     // occurs when the "app-startup" category is started up below
5470     //
5471     // After this completes, we are ready to launch sandboxed processes
5472     mozilla::SandboxBroker::GeckoDependentInitialize();
5473 #endif
5474
5475     nsCOMPtr<nsIFile> workingDir;
5476     rv = NS_GetSpecialDirectory(NS_OS_CURRENT_WORKING_DIR,
5477                                 getter_AddRefs(workingDir));
5478     if (NS_FAILED(rv)) {
5479       // No working dir? This can happen if it gets deleted before we start.
5480       workingDir = nullptr;
5481     }
5482
5483     cmdLine = new nsCommandLine();
5484
5485     rv = cmdLine->Init(gArgc, gArgv, workingDir,
5486                        nsICommandLine::STATE_INITIAL_LAUNCH);
5487     NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
5488
5489     // "app-startup" is the name of both the category and the event
5490     NS_CreateServicesFromCategory("app-startup", cmdLine, "app-startup",
5491                                   nullptr);
5492
5493     appStartup = components::AppStartup::Service();
5494     NS_ENSURE_TRUE(appStartup, NS_ERROR_FAILURE);
5495
5496     mDirProvider.DoStartup();
5497
5498 #ifdef XP_WIN
5499     // It needs to be called on the main thread because it has to use
5500     // nsObserverService.
5501     EnsureWin32kInitialized();
5502 #endif
5503
5504     // As FilePreferences need the profile directory, we must initialize right
5505     // here.
5506     mozilla::FilePreferences::InitDirectoriesAllowlist();
5507     mozilla::FilePreferences::InitPrefs();
5508
5509     nsCString userAgentLocale;
5510     LocaleService::GetInstance()->GetAppLocaleAsBCP47(userAgentLocale);
5511     CrashReporter::RecordAnnotationNSCString(
5512         CrashReporter::Annotation::useragent_locale, userAgentLocale);
5513
5514     if (!AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
5515       /* Special-case services that need early access to the command
5516           line. */
5517       nsCOMPtr<nsIObserverService> obsService =
5518           mozilla::services::GetObserverService();
5519       if (obsService) {
5520         obsService->NotifyObservers(cmdLine, "command-line-startup", nullptr);
5521       }
5522     }
5523
5524 #ifdef XP_WIN
5525     // Hack to sync up the various environment storages. XUL_APP_FILE is special
5526     // in that it comes from a different CRT (firefox.exe's static-linked copy).
5527     // Ugly details in http://bugzil.la/1175039#c27
5528     char appFile[MAX_PATH];
5529     if (GetEnvironmentVariableA("XUL_APP_FILE", appFile, sizeof(appFile))) {
5530       SmprintfPointer saved = mozilla::Smprintf("XUL_APP_FILE=%s", appFile);
5531       // We intentionally leak the string here since it is required by
5532       // PR_SetEnv.
5533       PR_SetEnv(saved.release());
5534     }
5535 #endif
5536
5537     mozilla::AppShutdown::SaveEnvVarsForPotentialRestart();
5538
5539     // clear out any environment variables which may have been set
5540     // during the relaunch process now that we know we won't be relaunching.
5541     SaveToEnv("XRE_PROFILE_PATH=");
5542     SaveToEnv("XRE_PROFILE_LOCAL_PATH=");
5543     SaveToEnv("XRE_START_OFFLINE=");
5544     SaveToEnv("XUL_APP_FILE=");
5545     SaveToEnv("XRE_BINARY_PATH=");
5546     SaveToEnv("XRE_RESTARTED_BY_PROFILE_MANAGER=");
5547
5548     if (!AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
5549       // Don't create the hidden window during startup on
5550       // platforms that don't always need it.
5551 #ifdef XP_MACOSX
5552       bool lazyHiddenWindow = false;
5553 #else
5554       bool lazyHiddenWindow = true;
5555 #endif
5556
5557 #ifdef MOZ_BACKGROUNDTASKS
5558       if (BackgroundTasks::IsBackgroundTaskMode()) {
5559         // Background tasks aren't going to load a chrome XUL document.
5560         lazyHiddenWindow = true;
5561       }
5562 #endif
5563
5564       if (!lazyHiddenWindow) {
5565         rv = appStartup->CreateHiddenWindow();
5566         NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
5567       }
5568
5569 #ifdef XP_WIN
5570       Preferences::RegisterCallbackAndCall(
5571           RegisterApplicationRestartChanged,
5572           PREF_WIN_REGISTER_APPLICATION_RESTART);
5573       SetupAlteredPrefetchPref();
5574       SetupSkeletonUIPrefs();
5575 #  if defined(MOZ_LAUNCHER_PROCESS)
5576       SetupLauncherProcessPref();
5577 #  endif  // defined(MOZ_LAUNCHER_PROCESS)
5578 #  if defined(MOZ_DEFAULT_BROWSER_AGENT)
5579 #    if defined(MOZ_BACKGROUNDTASKS)
5580       // The backgroundtask profile is not a browsing profile, let alone the new
5581       // default profile, so don't mirror its properties into the registry.
5582       if (!BackgroundTasks::IsBackgroundTaskMode())
5583 #    endif  // defined(MOZ_BACKGROUNDTASKS)
5584       {
5585         Preferences::RegisterCallbackAndCall(
5586             &OnDefaultAgentTelemetryPrefChanged,
5587             kPrefHealthReportUploadEnabled);
5588         Preferences::RegisterCallbackAndCall(
5589             &OnDefaultAgentTelemetryPrefChanged, kPrefDefaultAgentEnabled);
5590
5591         Preferences::RegisterCallbackAndCall(
5592             &OnDefaultAgentRemoteSettingsPrefChanged,
5593             kPrefServicesSettingsServer);
5594
5595         Preferences::RegisterCallbackAndCall(
5596             &OnSetDefaultBrowserUserChoicePrefChanged,
5597             kPrefSetDefaultBrowserUserChoicePref);
5598
5599         SetDefaultAgentLastRunTime();
5600       }
5601 #  endif  // defined(MOZ_DEFAULT_BROWSER_AGENT)
5602 #endif
5603
5604 #if defined(MOZ_WIDGET_GTK)
5605       // Clear the environment variables so they won't be inherited by child
5606       // processes and confuse things.
5607       for (const auto& name : kStartupTokenNames) {
5608         g_unsetenv(name.get());
5609       }
5610 #endif
5611
5612 #ifdef XP_MACOSX
5613       InitializeMacApp();
5614
5615       // we re-initialize the command-line service and do appleevents munging
5616       // after we are sure that we're not restarting
5617       cmdLine = new nsCommandLine();
5618
5619       char** tempArgv = static_cast<char**>(malloc(gArgc * sizeof(char*)));
5620       for (int i = 0; i < gArgc; i++) {
5621         tempArgv[i] = strdup(gArgv[i]);
5622       }
5623       CommandLineServiceMac::SetupMacCommandLine(gArgc, tempArgv, false);
5624       rv = cmdLine->Init(gArgc, tempArgv, workingDir,
5625                          nsICommandLine::STATE_INITIAL_LAUNCH);
5626       free(tempArgv);
5627       NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
5628
5629 #  ifdef MOZILLA_OFFICIAL
5630       // Check if we're running from a DMG or an app translocated location and
5631       // allow the user to install to the Applications directory.
5632       if (MacRunFromDmgUtils::MaybeInstallAndRelaunch()) {
5633         bool userAllowedQuit = true;
5634         appStartup->Quit(nsIAppStartup::eForceQuit, 0, &userAllowedQuit);
5635       }
5636 #  endif
5637 #endif
5638
5639       nsCOMPtr<nsIObserverService> obsService =
5640           mozilla::services::GetObserverService();
5641       if (obsService)
5642         obsService->NotifyObservers(nullptr, "final-ui-startup", nullptr);
5643
5644       (void)appStartup->DoneStartingUp();
5645
5646       CrashReporter::RecordAnnotationBool(
5647           CrashReporter::Annotation::StartupCrash, false);
5648
5649       AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed);
5650     }
5651
5652     if (!AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
5653       rv = cmdLine->Run();
5654       NS_ENSURE_SUCCESS_LOG(rv, NS_ERROR_FAILURE);
5655     }
5656
5657     if (!AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
5658 #if defined(MOZ_HAS_REMOTE)
5659       // if we have X remote support, start listening for requests on the
5660       // proxy window.
5661       if (mRemoteService && !mDisableRemoteServer) {
5662         mRemoteService->StartupServer();
5663         mRemoteService->UnlockStartup();
5664         gRemoteService = nullptr;
5665       }
5666 #endif /* MOZ_WIDGET_GTK */
5667
5668       mNativeApp->Enable();
5669     }
5670
5671 #ifdef MOZ_INSTRUMENT_EVENT_LOOP
5672     if (PR_GetEnv("MOZ_INSTRUMENT_EVENT_LOOP")) {
5673       bool logToConsole = true;
5674       mozilla::InitEventTracing(logToConsole);
5675     }
5676 #endif /* MOZ_INSTRUMENT_EVENT_LOOP */
5677
5678     // Send Telemetry about Gecko version and buildid
5679     mozilla::glean::gecko::version.Set(nsDependentCString(gAppData->version));
5680     mozilla::glean::gecko::build_id.Set(nsDependentCString(gAppData->buildID));
5681
5682 #if defined(MOZ_SANDBOX) && defined(XP_LINUX)
5683     // If we're on Linux, we now have information about the OS capabilities
5684     // available to us.
5685     SandboxInfo sandboxInfo = SandboxInfo::Get();
5686     Telemetry::Accumulate(Telemetry::SANDBOX_HAS_SECCOMP_BPF,
5687                           sandboxInfo.Test(SandboxInfo::kHasSeccompBPF));
5688     Telemetry::Accumulate(Telemetry::SANDBOX_HAS_SECCOMP_TSYNC,
5689                           sandboxInfo.Test(SandboxInfo::kHasSeccompTSync));
5690     Telemetry::Accumulate(
5691         Telemetry::SANDBOX_HAS_USER_NAMESPACES_PRIVILEGED,
5692         sandboxInfo.Test(SandboxInfo::kHasPrivilegedUserNamespaces));
5693     Telemetry::Accumulate(Telemetry::SANDBOX_HAS_USER_NAMESPACES,
5694                           sandboxInfo.Test(SandboxInfo::kHasUserNamespaces));
5695     Telemetry::Accumulate(Telemetry::SANDBOX_CONTENT_ENABLED,
5696                           sandboxInfo.Test(SandboxInfo::kEnabledForContent));
5697     Telemetry::Accumulate(Telemetry::SANDBOX_MEDIA_ENABLED,
5698                           sandboxInfo.Test(SandboxInfo::kEnabledForMedia));
5699
5700     CrashReporter::RecordAnnotationU32(
5701         CrashReporter::Annotation::ContentSandboxCapabilities,
5702         sandboxInfo.AsInteger());
5703 #endif /* MOZ_SANDBOX && XP_LINUX */
5704
5705 #if defined(XP_WIN)
5706     LauncherResult<bool> isAdminWithoutUac = IsAdminWithoutUac();
5707     if (isAdminWithoutUac.isOk()) {
5708       Telemetry::ScalarSet(
5709           Telemetry::ScalarID::OS_ENVIRONMENT_IS_ADMIN_WITHOUT_UAC,
5710           isAdminWithoutUac.unwrap());
5711     }
5712 #endif /* XP_WIN */
5713
5714 #if defined(MOZ_SANDBOX)
5715     AddSandboxAnnotations();
5716 #endif /* MOZ_SANDBOX */
5717
5718     mProfileSvc->CompleteStartup();
5719   }
5720
5721 #ifdef MOZ_BACKGROUNDTASKS
5722   if (BackgroundTasks::IsBackgroundTaskMode()) {
5723     // In background task mode, we don't fire various delayed initialization
5724     // notifications, which in the regular browser is how startup crash tracking
5725     // is marked as finished.  Here, getting this far means we don't have a
5726     // startup crash.
5727     rv = appStartup->TrackStartupCrashEnd();
5728     NS_ENSURE_SUCCESS(rv, rv);
5729
5730     // We never open a window, but don't want to exit immediately.
5731     rv = appStartup->EnterLastWindowClosingSurvivalArea();
5732     NS_ENSURE_SUCCESS(rv, rv);
5733
5734     // Avoid some small differences in initialization order across platforms.
5735     nsCOMPtr<nsIPowerManagerService> powerManagerService =
5736         do_GetService(POWERMANAGERSERVICE_CONTRACTID);
5737     nsCOMPtr<nsIStringBundleService> stringBundleService =
5738         do_GetService(NS_STRINGBUNDLE_CONTRACTID);
5739
5740     rv = BackgroundTasks::RunBackgroundTask(cmdLine);
5741     NS_ENSURE_SUCCESS(rv, rv);
5742   }
5743 #endif
5744
5745   {
5746     rv = appStartup->Run();
5747     if (NS_FAILED(rv)) {
5748       NS_ERROR("failed to run appstartup");
5749       gLogConsoleErrors = true;
5750     }
5751   }
5752
5753   return rv;
5754 }
5755
5756 #if defined(MOZ_WIDGET_ANDROID)
5757 static already_AddRefed<nsIFile> GreOmniPath(int argc, char** argv) {
5758   nsresult rv;
5759
5760   const char* path = nullptr;
5761   ArgResult ar = CheckArg(argc, argv, "greomni", &path, CheckArgFlag::None);
5762   if (ar == ARG_BAD) {
5763     PR_fprintf(PR_STDERR,
5764                "Error: argument --greomni requires a path argument\n");
5765     return nullptr;
5766   }
5767
5768   if (!path) return nullptr;
5769
5770   nsCOMPtr<nsIFile> greOmni;
5771   rv = XRE_GetFileFromPath(path, getter_AddRefs(greOmni));
5772   if (NS_FAILED(rv)) {
5773     PR_fprintf(PR_STDERR, "Error: argument --greomni requires a valid path\n");
5774     return nullptr;
5775   }
5776
5777   return greOmni.forget();
5778 }
5779 #endif
5780
5781 /*
5782  * XRE_main - A class based main entry point used by most platforms.
5783  *            Note that on OSX, aAppData->xreDirectory will point to
5784  *            .app/Contents/Resources.
5785  */
5786 int XREMain::XRE_main(int argc, char* argv[], const BootstrapConfig& aConfig) {
5787   gArgc = argc;
5788   gArgv = argv;
5789
5790   ScopedLogging log;
5791
5792   mozilla::LogModule::Init(gArgc, gArgv);
5793
5794 #ifndef XP_LINUX
5795   NS_SetCurrentThreadName("MainThread");
5796 #endif
5797
5798   AUTO_BASE_PROFILER_LABEL("XREMain::XRE_main (around Gecko Profiler)", OTHER);
5799   AUTO_PROFILER_INIT;
5800   AUTO_PROFILER_LABEL("XREMain::XRE_main", OTHER);
5801
5802 #ifdef XP_MACOSX
5803   // We call this early because it will kick off a background-thread task
5804   // to register the fonts, and we'd like it to have a chance to complete
5805   // before gfxPlatform initialization actually requires it.
5806   gfxPlatformMac::RegisterSupplementalFonts();
5807 #endif
5808
5809 #ifdef MOZ_CODE_COVERAGE
5810   CodeCoverageHandler::Init();
5811 #endif
5812
5813   nsresult rv = NS_OK;
5814
5815   if (aConfig.appData) {
5816     mAppData = MakeUnique<XREAppData>(*aConfig.appData);
5817   } else {
5818     MOZ_RELEASE_ASSERT(aConfig.appDataPath);
5819     nsCOMPtr<nsIFile> appini;
5820     rv = XRE_GetFileFromPath(aConfig.appDataPath, getter_AddRefs(appini));
5821     if (NS_FAILED(rv)) {
5822       Output(true, "Error: unrecognized path: %s\n", aConfig.appDataPath);
5823       return 1;
5824     }
5825
5826     mAppData = MakeUnique<XREAppData>();
5827     rv = XRE_ParseAppData(appini, *mAppData);
5828     if (NS_FAILED(rv)) {
5829       Output(true, "Couldn't read application.ini");
5830       return 1;
5831     }
5832
5833     appini->GetParent(getter_AddRefs(mAppData->directory));
5834   }
5835
5836   const char* appRemotingName = getenv("MOZ_APP_REMOTINGNAME");
5837   if (appRemotingName) {
5838     mAppData->remotingName = appRemotingName;
5839   } else if (!mAppData->remotingName) {
5840     mAppData->remotingName = mAppData->name;
5841   }
5842   // used throughout this file
5843   gAppData = mAppData.get();
5844
5845   nsCOMPtr<nsIFile> binFile;
5846   rv = XRE_GetBinaryPath(getter_AddRefs(binFile));
5847   NS_ENSURE_SUCCESS(rv, 1);
5848
5849   rv = binFile->GetPath(gAbsoluteArgv0Path);
5850   NS_ENSURE_SUCCESS(rv, 1);
5851
5852   if (!mAppData->xreDirectory) {
5853     nsCOMPtr<nsIFile> greDir;
5854
5855 #if defined(MOZ_WIDGET_ANDROID)
5856     greDir = GreOmniPath(argc, argv);
5857     if (!greDir) {
5858       return 2;
5859     }
5860 #else
5861     rv = binFile->GetParent(getter_AddRefs(greDir));
5862     if (NS_FAILED(rv)) return 2;
5863 #endif
5864
5865 #ifdef XP_MACOSX
5866     nsCOMPtr<nsIFile> parent;
5867     greDir->GetParent(getter_AddRefs(parent));
5868     greDir = parent.forget();
5869     greDir->AppendNative("Resources"_ns);
5870 #endif
5871
5872     mAppData->xreDirectory = greDir;
5873   }
5874
5875 #if defined(MOZ_WIDGET_ANDROID)
5876   nsCOMPtr<nsIFile> dataDir;
5877   rv = binFile->GetParent(getter_AddRefs(dataDir));
5878   if (NS_FAILED(rv)) return 2;
5879
5880   mAppData->directory = dataDir;
5881 #else
5882   if (aConfig.appData && aConfig.appDataPath) {
5883     mAppData->xreDirectory->Clone(getter_AddRefs(mAppData->directory));
5884     mAppData->directory->AppendNative(nsDependentCString(aConfig.appDataPath));
5885   }
5886 #endif
5887
5888   if (!mAppData->directory) {
5889     mAppData->directory = mAppData->xreDirectory;
5890   }
5891
5892 #if defined(XP_WIN)
5893 #  if defined(MOZ_SANDBOX)
5894   mAppData->sandboxBrokerServices = aConfig.sandboxBrokerServices;
5895 #  endif  // defined(MOZ_SANDBOX)
5896
5897   {
5898     DebugOnly<bool> result = WindowsBCryptInitialization();
5899     MOZ_ASSERT(result);
5900   }
5901
5902 #  if defined(_M_IX86) || defined(_M_X64)
5903   {
5904     DebugOnly<bool> result = WindowsMsctfInitialization();
5905     MOZ_ASSERT(result);
5906   }
5907 #  endif  // _M_IX86 || _M_X64
5908
5909 #endif  // defined(XP_WIN)
5910
5911   // Once we unset the exception handler, we lose the ability to properly
5912   // detect hangs -- they show up as crashes.  We do this as late as possible.
5913   // In particular, after ProcessRuntime is destroyed on Windows.
5914   auto unsetExceptionHandler = MakeScopeExit([&] {
5915     if (mAppData->flags & NS_XRE_ENABLE_CRASH_REPORTER)
5916       return CrashReporter::UnsetExceptionHandler();
5917     return NS_OK;
5918   });
5919
5920   mozilla::AutoIOInterposer ioInterposerGuard;
5921   ioInterposerGuard.Init();
5922
5923 #if defined(XP_WIN)
5924   // We should have already done this when we created the skeleton UI. However,
5925   // there is code in here which needs xul in order to work, like EnsureMTA. It
5926   // should be setup that running it again is safe.
5927   mozilla::mscom::ProcessRuntime msCOMRuntime;
5928 #endif
5929
5930   // init
5931   bool exit = false;
5932   int result = XRE_mainInit(&exit);
5933   if (result != 0 || exit) return result;
5934
5935   // If we exit gracefully, remove the startup crash canary file.
5936   auto cleanup = MakeScopeExit([&]() -> nsresult {
5937     if (mProfLD) {
5938       nsCOMPtr<nsIFile> crashFile;
5939       MOZ_TRY_VAR(crashFile, GetIncompleteStartupFile(mProfLD));
5940       crashFile->Remove(false);
5941     }
5942     return NS_OK;
5943   });
5944
5945   // startup
5946   result = XRE_mainStartup(&exit);
5947   if (result != 0 || exit) return result;
5948
5949   // Start the real application. We use |aInitJSContext = false| because
5950   // XRE_mainRun wants to initialize the JSContext after reading user prefs.
5951
5952   mScopedXPCOM = MakeUnique<ScopedXPCOMStartup>();
5953
5954   rv = mScopedXPCOM->Initialize(/* aInitJSContext = */ false);
5955   NS_ENSURE_SUCCESS(rv, 1);
5956
5957   // run!
5958   rv = XRE_mainRun();
5959
5960 #ifdef MOZ_X11
5961   XRE_CleanupX11ErrorHandler();
5962 #endif
5963
5964 #ifdef MOZ_INSTRUMENT_EVENT_LOOP
5965   mozilla::ShutdownEventTracing();
5966 #endif
5967
5968   gAbsoluteArgv0Path.Truncate();
5969
5970 #if defined(MOZ_HAS_REMOTE)
5971   // Shut down the remote service. We must do this before calling LaunchChild
5972   // if we're restarting because otherwise the new instance will attempt to
5973   // remote to this instance.
5974   if (mRemoteService && !mDisableRemoteServer) {
5975     mRemoteService->ShutdownServer();
5976   }
5977 #endif /* MOZ_WIDGET_GTK */
5978
5979   mScopedXPCOM = nullptr;
5980
5981   // unlock the profile after ScopedXPCOMStartup object (xpcom)
5982   // has gone out of scope.  see bug #386739 for more details
5983   mProfileLock->Unlock();
5984   gProfileLock = nullptr;
5985
5986   gLastAppVersion.Truncate();
5987   gLastAppBuildID.Truncate();
5988
5989 #ifdef MOZ_WIDGET_GTK
5990   // gdk_display_close also calls gdk_display_manager_set_default_display
5991   // appropriately when necessary.
5992   if (!gfxPlatform::IsHeadless()) {
5993 #  ifdef MOZ_WAYLAND
5994     WaylandDisplayRelease();
5995     gWaylandProxy = nullptr;
5996 #  endif
5997   }
5998 #endif
5999
6000   mozilla::AppShutdown::MaybeDoRestart();
6001
6002   XRE_DeinitCommandLine();
6003
6004   if (NS_FAILED(rv)) {
6005     return 1;
6006   }
6007   return mozilla::AppShutdown::GetExitCode();
6008 }
6009
6010 void XRE_StopLateWriteChecks(void) { mozilla::StopLateWriteChecks(); }
6011
6012 int XRE_main(int argc, char* argv[], const BootstrapConfig& aConfig) {
6013   XREMain main;
6014
6015   int result = main.XRE_main(argc, argv, aConfig);
6016   mozilla::RecordShutdownEndTimeStamp();
6017 #ifdef MOZ_BACKGROUNDTASKS
6018   // This is well after the profile has been unlocked, so it's okay if this does
6019   // delete this background task's temporary profile.
6020   mozilla::BackgroundTasks::Shutdown();
6021 #endif
6022   return result;
6023 }
6024
6025 nsresult XRE_InitCommandLine(int aArgc, char* aArgv[]) {
6026   nsresult rv = NS_OK;
6027
6028 #if defined(XP_WIN)
6029   CommandLine::Init(aArgc, aArgv);
6030 #else
6031
6032   // these leak on error, but that's OK: we'll just exit()
6033   char** canonArgs = new char*[aArgc];
6034
6035   // get the canonical version of the binary's path
6036   nsCOMPtr<nsIFile> binFile;
6037   rv = XRE_GetBinaryPath(getter_AddRefs(binFile));
6038   if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
6039
6040   nsAutoCString canonBinPath;
6041   rv = binFile->GetNativePath(canonBinPath);
6042   if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
6043
6044   canonArgs[0] = strdup(canonBinPath.get());
6045
6046   for (int i = 1; i < aArgc; ++i) {
6047     if (aArgv[i]) {
6048       canonArgs[i] = strdup(aArgv[i]);
6049     }
6050   }
6051
6052   NS_ASSERTION(!CommandLine::IsInitialized(), "Bad news!");
6053   CommandLine::Init(aArgc, canonArgs);
6054
6055   for (int i = 0; i < aArgc; ++i) free(canonArgs[i]);
6056   delete[] canonArgs;
6057 #endif
6058
6059 #if defined(MOZ_WIDGET_ANDROID)
6060   // gAppData is non-null iff this is the parent process.  Otherwise,
6061   // the `-greomni`/`-appomni` flags are cross-platform and handled in
6062   // ContentProcess::Init.
6063   if (gAppData) {
6064     nsCOMPtr<nsIFile> greOmni = gAppData->xreDirectory;
6065     if (!greOmni) {
6066       return NS_ERROR_FAILURE;
6067     }
6068     mozilla::Omnijar::Init(greOmni, greOmni);
6069   }
6070 #endif
6071
6072   return rv;
6073 }
6074
6075 nsresult XRE_DeinitCommandLine() {
6076   nsresult rv = NS_OK;
6077
6078   CommandLine::Terminate();
6079
6080   return rv;
6081 }
6082
6083 GeckoProcessType XRE_GetProcessType() { return GetGeckoProcessType(); }
6084
6085 const char* XRE_GetProcessTypeString() {
6086   return XRE_GeckoProcessTypeToString(XRE_GetProcessType());
6087 }
6088
6089 bool XRE_IsE10sParentProcess() {
6090 #ifdef MOZ_WIDGET_ANDROID
6091   return XRE_IsParentProcess() && BrowserTabsRemoteAutostart() &&
6092          mozilla::jni::IsAvailable();
6093 #else
6094   return XRE_IsParentProcess() && BrowserTabsRemoteAutostart();
6095 #endif
6096 }
6097
6098 #define GECKO_PROCESS_TYPE(enum_value, enum_name, string_name, proc_typename, \
6099                            process_bin_type, procinfo_typename,               \
6100                            webidl_typename, allcaps_name)                     \
6101   bool XRE_Is##proc_typename##Process() {                                     \
6102     return XRE_GetProcessType() == GeckoProcessType_##enum_name;              \
6103   }
6104 #include "mozilla/GeckoProcessTypes.h"
6105 #undef GECKO_PROCESS_TYPE
6106
6107 bool XRE_UseNativeEventProcessing() {
6108   switch (XRE_GetProcessType()) {
6109 #if defined(XP_MACOSX) || defined(XP_WIN)
6110     case GeckoProcessType_RDD:
6111     case GeckoProcessType_Socket:
6112       return false;
6113     case GeckoProcessType_Utility: {
6114 #  if defined(XP_WIN)
6115       auto upc = mozilla::ipc::UtilityProcessChild::Get();
6116       MOZ_ASSERT(upc);
6117
6118       using SboxKind = mozilla::ipc::SandboxingKind;
6119       // These processes are used as external hosts for accessing Windows
6120       // APIs which (may) require a Windows native event loop.
6121       return upc->mSandbox == SboxKind::WINDOWS_UTILS ||
6122              upc->mSandbox == SboxKind::WINDOWS_FILE_DIALOG;
6123 #  else
6124       return false;
6125 #  endif  // defined(XP_WIN)
6126     }
6127 #endif  // defined(XP_MACOSX) || defined(XP_WIN)
6128     case GeckoProcessType_GMPlugin:
6129       return mozilla::gmp::GMPProcessChild::UseNativeEventProcessing();
6130     case GeckoProcessType_Content:
6131       return StaticPrefs::dom_ipc_useNativeEventProcessing_content();
6132     default:
6133       return true;
6134   }
6135 }
6136
6137 namespace mozilla {
6138
6139 uint32_t GetMaxWebProcessCount() {
6140   // multiOptOut is in int to allow us to run multiple experiments without
6141   // introducing multiple prefs a la the autostart.N prefs.
6142   if (Preferences::GetInt("dom.ipc.multiOptOut", 0) >=
6143       nsIXULRuntime::E10S_MULTI_EXPERIMENT) {
6144     return 1;
6145   }
6146
6147   const char* optInPref = "dom.ipc.processCount";
6148   uint32_t optInPrefValue = Preferences::GetInt(optInPref, 1);
6149   return std::max(1u, optInPrefValue);
6150 }
6151
6152 const char* PlatformBuildID() { return gToolkitBuildID; }
6153
6154 }  // namespace mozilla
6155
6156 void SetupErrorHandling(const char* progname) {
6157 #ifdef XP_WIN
6158   /* On Windows XPSP3 and Windows Vista if DEP is configured off-by-default
6159      we still want DEP protection: enable it explicitly and programmatically.
6160
6161      This function is not available on WinXPSP2 so we dynamically load it.
6162   */
6163
6164   HMODULE kernel32 = GetModuleHandleW(L"kernel32.dll");
6165   SetProcessDEPPolicyFunc _SetProcessDEPPolicy =
6166       (SetProcessDEPPolicyFunc)GetProcAddress(kernel32, "SetProcessDEPPolicy");
6167   if (_SetProcessDEPPolicy) _SetProcessDEPPolicy(PROCESS_DEP_ENABLE);
6168 #endif
6169
6170 #ifdef XP_WIN
6171   // Suppress the "DLL Foo could not be found" dialog, such that if dependent
6172   // libraries (such as GDI+) are not preset, we gracefully fail to load those
6173   // XPCOM components, instead of being ungraceful.
6174   UINT realMode = SetErrorMode(0);
6175   realMode |= SEM_FAILCRITICALERRORS;
6176   // If XRE_NO_WINDOWS_CRASH_DIALOG is set, suppress displaying the "This
6177   // application has crashed" dialog box.  This is mainly useful for
6178   // automated testing environments, e.g. tinderbox, where there's no need
6179   // for a dozen of the dialog boxes to litter the console
6180   if (getenv("XRE_NO_WINDOWS_CRASH_DIALOG"))
6181     realMode |= SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX;
6182
6183   SetErrorMode(realMode);
6184
6185 #endif
6186
6187   InstallSignalHandlers(progname);
6188
6189   // Unbuffer stdout, needed for tinderbox tests.
6190   setbuf(stdout, 0);
6191 }
6192
6193 static bool gRunSelfAsContentProc = false;
6194
6195 void XRE_EnableSameExecutableForContentProc() {
6196   if (!PR_GetEnv("MOZ_SEPARATE_CHILD_PROCESS")) {
6197     gRunSelfAsContentProc = true;
6198   }
6199 }
6200
6201 mozilla::BinPathType XRE_GetChildProcBinPathType(
6202     GeckoProcessType aProcessType) {
6203   MOZ_ASSERT(aProcessType != GeckoProcessType_Default);
6204
6205   if (!gRunSelfAsContentProc) {
6206     return BinPathType::PluginContainer;
6207   }
6208
6209 #ifdef XP_WIN
6210   // On Windows, plugin-container may or may not be used depending on
6211   // the process type (e.g., actual plugins vs. content processes)
6212   switch (aProcessType) {
6213 #  define GECKO_PROCESS_TYPE(enum_value, enum_name, string_name,               \
6214                              proc_typename, process_bin_type,                  \
6215                              procinfo_typename, webidl_typename, allcaps_name) \
6216     case GeckoProcessType_##enum_name:                                         \
6217       return BinPathType::process_bin_type;
6218 #  include "mozilla/GeckoProcessTypes.h"
6219 #  undef GECKO_PROCESS_TYPE
6220     default:
6221       return BinPathType::PluginContainer;
6222   }
6223 #else
6224   // On (non-macOS) Unix, plugin-container isn't used (except in cases
6225   // like xpcshell that are handled by the gRunSelfAsContentProc check
6226   // above).  It isn't necessary the way it is on other platforms, and
6227   // it interferes with using the fork server.
6228   return BinPathType::Self;
6229 #endif
6230 }
6231
6232 // From mozglue/static/rust/lib.rs
6233 extern "C" void install_rust_hooks();
6234
6235 struct InstallRustHooks {
6236   InstallRustHooks() { install_rust_hooks(); }
6237 };
6238
6239 InstallRustHooks sInstallRustHooks;
6240
6241 #ifdef MOZ_ASAN_REPORTER
6242 void setASanReporterPath(nsIFile* aDir) {
6243   nsCOMPtr<nsIFile> dir;
6244   aDir->Clone(getter_AddRefs(dir));
6245
6246   dir->Append(u"asan"_ns);
6247   nsresult rv = dir->Create(nsIFile::DIRECTORY_TYPE, 0700);
6248   if (NS_WARN_IF(NS_FAILED(rv) && rv != NS_ERROR_FILE_ALREADY_EXISTS)) {
6249     MOZ_CRASH("[ASan Reporter] Unable to create crash directory.");
6250   }
6251
6252   dir->Append(u"ff_asan_log"_ns);
6253
6254 #  ifdef XP_WIN
6255   nsAutoString nspathW;
6256   rv = dir->GetPath(nspathW);
6257   NS_ConvertUTF16toUTF8 nspath(nspathW);
6258 #  else
6259   nsAutoCString nspath;
6260   rv = dir->GetNativePath(nspath);
6261 #  endif
6262   if (NS_FAILED(rv)) {
6263     MOZ_CRASH("[ASan Reporter] Unable to get native path for crash directory.");
6264   }
6265
6266   __sanitizer_set_report_path(nspath.get());
6267 }
6268 #endif