Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 833 insertions, 0 deletions

diff --git a/toolkit/xre/nsEmbedFunctions.cpp b/toolkit/xre/nsEmbedFunctions.cpp
new file mode 100644
index 0000000000..fa236e0f86
--- /dev/null
+++ b/toolkit/xre/nsEmbedFunctions.cpp
@@ -0,0 +1,833 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/DebugOnly.h"
+
+#include "nsXULAppAPI.h"
+
+#include <stdlib.h>
+#if defined(MOZ_WIDGET_GTK)
+#  include <glib.h>
+#endif
+
+#include "prenv.h"
+
+#include "nsIAppShell.h"
+#include "nsIToolkitProfile.h"
+
+#ifdef XP_WIN
+#  include <process.h>
+#  include <shobjidl.h>
+#  include "mozilla/ipc/WindowsMessageLoop.h"
+#  ifdef MOZ_SANDBOX
+#    include "mozilla/RandomNum.h"
+#  endif
+#  include "mozilla/ScopeExit.h"
+#  include "mozilla/WinDllServices.h"
+#  include "mozilla/WindowsBCryptInitialization.h"
+#  include "WinUtils.h"
+#endif
+
+#include "nsAppRunner.h"
+#include "nsExceptionHandler.h"
+#include "mozilla/RuntimeExceptionModule.h"
+#include "nsThreadUtils.h"
+#include "nsJSUtils.h"
+#include "nsWidgetsCID.h"
+#include "nsXREDirProvider.h"
+#ifdef MOZ_ASAN_REPORTER
+#  include "CmdLineAndEnvUtils.h"
+#  include "nsIFile.h"
+#endif
+
+#include "mozilla/Omnijar.h"
+#if defined(XP_MACOSX)
+#  include <mach/mach.h>
+#  include <servers/bootstrap.h>
+#  include "nsVersionComparator.h"
+#  include "chrome/common/mach_ipc_mac.h"
+#  include "gfxPlatformMac.h"
+#endif
+#include "nsX11ErrorHandler.h"
+#include "nsGDKErrorHandler.h"
+#include "base/at_exit.h"
+#include "base/message_loop.h"
+#include "base/process_util.h"
+#if defined(MOZ_WIDGET_ANDROID)
+#  include "chrome/common/ipc_channel.h"
+#  include "mozilla/jni/Utils.h"
+#  include "mozilla/ipc/ProcessUtils.h"
+#endif  //  defined(MOZ_WIDGET_ANDROID)
+
+#include "mozilla/AbstractThread.h"
+#include "mozilla/FilePreferences.h"
+#include "mozilla/IOInterposer.h"
+#include "mozilla/ProcessType.h"
+#include "mozilla/RDDProcessImpl.h"
+#include "mozilla/ipc/UtilityProcessImpl.h"
+#include "mozilla/UniquePtr.h"
+
+#include "mozilla/ipc/BrowserProcessSubThread.h"
+#include "mozilla/ipc/IOThreadChild.h"
+#include "mozilla/ipc/ProcessChild.h"
+
+#include "mozilla/dom/ContentProcess.h"
+#include "mozilla/dom/ContentParent.h"
+
+#include "mozilla/ipc/TestShellParent.h"
+#if defined(XP_WIN)
+#  include "mozilla/WindowsConsole.h"
+#  include "mozilla/WindowsDllBlocklist.h"
+#endif
+
+#include "GMPProcessChild.h"
+#include "mozilla/gfx/GPUProcessImpl.h"
+#include "mozilla/net/SocketProcessImpl.h"
+
+#include "ProfilerControl.h"
+
+#if defined(MOZ_SANDBOX) && defined(XP_WIN)
+#  include "mozilla/sandboxTarget.h"
+#  include "mozilla/sandboxing/loggingCallbacks.h"
+#  include "mozilla/RemoteSandboxBrokerProcessChild.h"
+#endif
+
+#if defined(MOZ_SANDBOX)
+#  include "XREChildData.h"
+#  include "mozilla/SandboxSettings.h"
+#endif
+
+#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
+#  include "mozilla/Sandbox.h"
+#endif
+
+#if defined(XP_LINUX)
+#  include <sys/prctl.h>
+#  ifndef PR_SET_PTRACER
+#    define PR_SET_PTRACER 0x59616d61
+#  endif
+#  ifndef PR_SET_PTRACER_ANY
+#    define PR_SET_PTRACER_ANY ((unsigned long)-1)
+#  endif
+#endif
+
+#ifdef MOZ_JPROF
+#  include "jprof.h"
+#endif
+
+#if defined(XP_WIN) && defined(MOZ_SANDBOX)
+#  include "mozilla/sandboxing/SandboxInitialization.h"
+#  include "mozilla/sandboxing/sandboxLogging.h"
+#endif
+
+#if defined(MOZ_ENABLE_FORKSERVER)
+#  include "mozilla/ipc/ForkServer.h"
+#endif
+
+#if defined(MOZ_X11)
+#  include <X11/Xlib.h>
+#endif
+
+#include "VRProcessChild.h"
+
+using namespace mozilla;
+
+using mozilla::ipc::BrowserProcessSubThread;
+using mozilla::ipc::GeckoChildProcessHost;
+using mozilla::ipc::IOThreadChild;
+using mozilla::ipc::ProcessChild;
+
+using mozilla::dom::ContentParent;
+using mozilla::dom::ContentProcess;
+
+using mozilla::gmp::GMPProcessChild;
+
+using mozilla::ipc::TestShellCommandParent;
+using mozilla::ipc::TestShellParent;
+
+namespace mozilla::_ipdltest {
+// Set in IPDLUnitTest.cpp when running gtests.
+UniquePtr<mozilla::ipc::ProcessChild> (*gMakeIPDLUnitTestProcessChild)(
+    base::ProcessId, const nsID&) = nullptr;
+}  // namespace mozilla::_ipdltest
+
+static NS_DEFINE_CID(kAppShellCID, NS_APPSHELL_CID);
+
+const char* XRE_GeckoProcessTypeToString(GeckoProcessType aProcessType) {
+  switch (aProcessType) {
+#define GECKO_PROCESS_TYPE(enum_value, enum_name, string_name, proc_typename, \
+                           process_bin_type, procinfo_typename,               \
+                           webidl_typename, allcaps_name)                     \
+  case GeckoProcessType::GeckoProcessType_##enum_name:                        \
+    return string_name;
+#include "mozilla/GeckoProcessTypes.h"
+#undef GECKO_PROCESS_TYPE
+    default:
+      return "invalid";
+  }
+}
+
+const char* XRE_ChildProcessTypeToAnnotation(GeckoProcessType aProcessType) {
+  switch (aProcessType) {
+    case GeckoProcessType_GMPlugin:
+      return "plugin";
+    case GeckoProcessType_Default:
+      return "";
+    case GeckoProcessType_Content:
+      return "content";
+    default:
+      return XRE_GeckoProcessTypeToString(aProcessType);
+  }
+}
+
+#if defined(MOZ_WIDGET_ANDROID)
+void XRE_SetAndroidChildFds(JNIEnv* env, const XRE_AndroidChildFds& fds) {
+  mozilla::jni::SetGeckoThreadEnv(env);
+  mozilla::ipc::SetPrefsFd(fds.mPrefsFd);
+  mozilla::ipc::SetPrefMapFd(fds.mPrefMapFd);
+  IPC::Channel::SetClientChannelFd(fds.mIpcFd);
+  CrashReporter::SetNotificationPipeForChild(fds.mCrashFd);
+  CrashReporter::SetCrashAnnotationPipeForChild(fds.mCrashAnnotationFd);
+}
+#endif  // defined(MOZ_WIDGET_ANDROID)
+
+void XRE_SetProcessType(const char* aProcessTypeString) {
+  SetGeckoProcessType(aProcessTypeString);
+}
+
+#if defined(XP_WIN)
+void SetTaskbarGroupId(const nsString& aId) {
+  if (FAILED(SetCurrentProcessExplicitAppUserModelID(aId.get()))) {
+    NS_WARNING(
+        "SetCurrentProcessExplicitAppUserModelID failed for child process.");
+  }
+}
+#endif
+
+#if defined(MOZ_SANDBOX)
+void AddContentSandboxLevelAnnotation() {
+  if (XRE_GetProcessType() == GeckoProcessType_Content) {
+    int level = GetEffectiveContentSandboxLevel();
+    CrashReporter::AnnotateCrashReport(
+        CrashReporter::Annotation::ContentSandboxLevel, level);
+  } else if (XRE_GetProcessType() == GeckoProcessType_GPU) {
+    int level = GetEffectiveGpuSandboxLevel();
+    CrashReporter::AnnotateCrashReport(
+        CrashReporter::Annotation::GpuSandboxLevel, level);
+  }
+}
+#endif /* MOZ_SANDBOX */
+
+namespace {
+
+int GetDebugChildPauseTime() {
+  auto pauseStr = PR_GetEnv("MOZ_DEBUG_CHILD_PAUSE");
+  if (pauseStr && *pauseStr) {
+    int pause = atoi(pauseStr);
+    if (pause != 1) {  // must be !=1 since =1 enables the default pause time
+#if defined(OS_WIN)
+      pause *= 1000;  // convert to ms
+#endif
+      return pause;
+    }
+  }
+#ifdef OS_POSIX
+  return 30;  // seconds
+#elif defined(OS_WIN)
+  return 10000;  // milliseconds
+#else
+  return 0;
+#endif
+}
+
+static bool IsCrashReporterEnabled(const char* aArg) {
+  // on windows and mac, |aArg| is the named pipe on which the server is
+  // listening for requests, or "-" if crash reporting is disabled.
+#if defined(XP_MACOSX) || defined(XP_WIN)
+  return 0 != strcmp("-", aArg);
+#else
+  // on POSIX, |aArg| is "true" if crash reporting is enabled, false otherwise
+  return 0 != strcmp("false", aArg);
+#endif
+}
+
+}  // namespace
+
+nsresult XRE_InitChildProcess(int aArgc, char* aArgv[],
+                              const XREChildData* aChildData) {
+  NS_ENSURE_ARG_MIN(aArgc, 2);
+  NS_ENSURE_ARG_POINTER(aArgv);
+  NS_ENSURE_ARG_POINTER(aArgv[0]);
+  MOZ_ASSERT(aChildData);
+
+  NS_SetCurrentThreadName("MainThread");
+
+#ifdef MOZ_ASAN_REPORTER
+  // In ASan reporter builds, we need to set ASan's log_path as early as
+  // possible, so it dumps its errors into files there instead of using
+  // the default stderr location. Since this is crucial for ASan reporter
+  // to work at all (and we don't want people to use a non-functional
+  // ASan reporter build), all failures while setting log_path are fatal.
+  //
+  // We receive this log_path via the ASAN_REPORTER_PATH environment variable
+  // because there is no other way to generically get the necessary profile
+  // directory in all child types without adding support for that in each
+  // child process type class (at the risk of missing this in a child).
+  //
+  // In certain cases (e.g. child startup through xpcshell or gtests), this
+  // code needs to remain disabled, as no ASAN_REPORTER_PATH would be available.
+  if (!PR_GetEnv("MOZ_DISABLE_ASAN_REPORTER") && !PR_GetEnv("MOZ_RUN_GTEST")) {
+    nsCOMPtr<nsIFile> asanReporterPath = GetFileFromEnv("ASAN_REPORTER_PATH");
+    if (!asanReporterPath) {
+      MOZ_CRASH("Child did not receive ASAN_REPORTER_PATH!");
+    }
+    setASanReporterPath(asanReporterPath);
+  }
+#endif
+
+#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
+  // This has to happen before glib thread pools are started.
+  mozilla::SandboxEarlyInit();
+  // This just needs to happen before sandboxing, to initialize the
+  // cached value, but libmozsandbox can't see this symbol.
+  mozilla::GetNumberOfProcessors();
+#endif
+
+#ifdef MOZ_JPROF
+  // Call the code to install our handler
+  setupProfilingStuff();
+#endif
+
+#if defined(XP_WIN)
+  // From the --attach-console support in nsNativeAppSupportWin.cpp, but
+  // here we are a content child process, so we always attempt to attach
+  // to the parent's (ie, the browser's) console.
+  // Try to attach console to the parent process.
+  // It will succeed when the parent process is a command line,
+  // so that stdio will be displayed in it.
+  UseParentConsole();
+
+#  if defined(MOZ_SANDBOX)
+  if (aChildData->sandboxTargetServices) {
+    SandboxTarget::Instance()->SetTargetServices(
+        aChildData->sandboxTargetServices);
+  }
+#  endif
+#endif
+
+  // NB: This must be called before profiler_init
+  ScopedLogging logger;
+
+  mozilla::LogModule::Init(aArgc, aArgv);
+
+  AUTO_BASE_PROFILER_LABEL("XRE_InitChildProcess (around Gecko Profiler)",
+                           OTHER);
+  AUTO_PROFILER_INIT;
+  AUTO_PROFILER_LABEL("XRE_InitChildProcess", OTHER);
+
+#ifdef XP_MACOSX
+  gfxPlatformMac::RegisterSupplementalFonts();
+#endif
+
+  // Ensure AbstractThread is minimally setup, so async IPC messages
+  // work properly.
+  AbstractThread::InitTLS();
+
+  // Complete 'task_t' exchange for Mac OS X. This structure has the same size
+  // regardless of architecture so we don't have any cross-arch issues here.
+#ifdef XP_MACOSX
+  if (aArgc < 1) return NS_ERROR_FAILURE;
+
+#  if defined(MOZ_SANDBOX)
+  // Save the original number of arguments to pass to the sandbox
+  // setup routine which also uses the crash server argument.
+  int allArgc = aArgc;
+#  endif /* MOZ_SANDBOX */
+
+  // Acquire the mach bootstrap port name from our command line, and send our
+  // task_t to the parent process.
+  const char* const mach_port_name = aArgv[--aArgc];
+
+  const int kTimeoutMs = 1000;
+
+  UniqueMachSendRight task_sender;
+  kern_return_t kr = bootstrap_look_up(bootstrap_port, mach_port_name,
+                                       getter_Transfers(task_sender));
+  if (kr != KERN_SUCCESS) {
+    NS_WARNING(nsPrintfCString("child bootstrap_look_up failed: %s",
+                               mach_error_string(kr))
+                   .get());
+    return NS_ERROR_FAILURE;
+  }
+
+  kr = MachSendPortSendRight(task_sender.get(), mach_task_self(),
+                             Some(kTimeoutMs));
+  if (kr != KERN_SUCCESS) {
+    NS_WARNING(nsPrintfCString("child MachSendPortSendRight failed: %s",
+                               mach_error_string(kr))
+                   .get());
+    return NS_ERROR_FAILURE;
+  }
+
+#  if defined(MOZ_SANDBOX)
+  std::string sandboxError;
+  if (!GeckoChildProcessHost::StartMacSandbox(allArgc, aArgv, sandboxError)) {
+    printf_stderr("Sandbox error: %s\n", sandboxError.c_str());
+    MOZ_CRASH("Sandbox initialization failed");
+  }
+#  endif /* MOZ_SANDBOX */
+
+#endif /* XP_MACOSX */
+
+  SetupErrorHandling(aArgv[0]);
+
+  bool exceptionHandlerIsSet = false;
+  if (!CrashReporter::IsDummy()) {
+    CrashReporter::FileHandle crashTimeAnnotationFile =
+        CrashReporter::kInvalidFileHandle;
+#if defined(XP_WIN)
+    if (aArgc < 1) {
+      return NS_ERROR_FAILURE;
+    }
+    // Pop the first argument, this is used by the WER runtime exception module
+    // which reads it from the command-line so we can just discard it here.
+    --aArgc;
+
+    const char* const crashTimeAnnotationArg = aArgv[--aArgc];
+    crashTimeAnnotationFile = reinterpret_cast<CrashReporter::FileHandle>(
+        std::stoul(std::string(crashTimeAnnotationArg)));
+#endif
+
+    if (aArgc < 1) return NS_ERROR_FAILURE;
+    const char* const crashReporterArg = aArgv[--aArgc];
+
+    if (IsCrashReporterEnabled(crashReporterArg)) {
+      exceptionHandlerIsSet = CrashReporter::SetRemoteExceptionHandler(
+          crashReporterArg, crashTimeAnnotationFile);
+      MOZ_ASSERT(exceptionHandlerIsSet,
+                 "Should have been able to set remote exception handler");
+
+      if (!exceptionHandlerIsSet) {
+        // Bug 684322 will add better visibility into this condition
+        NS_WARNING("Could not setup crash reporting\n");
+      }
+    } else {
+      // We might have registered a runtime exception module very early in
+      // process startup to catch early crashes. This is before we process the
+      // crash reporter arg, so unregister here if it turns out the crash
+      // reporter is disabled.
+      CrashReporter::UnregisterRuntimeExceptionModule();
+    }
+  }
+
+  gArgv = aArgv;
+  gArgc = aArgc;
+
+#ifdef MOZ_X11
+  XInitThreads();
+#endif
+#ifdef MOZ_WIDGET_GTK
+  // Setting the name here avoids the need to pass this through to gtk_init().
+  g_set_prgname(aArgv[0]);
+#endif
+
+#ifdef OS_POSIX
+  if (PR_GetEnv("MOZ_DEBUG_CHILD_PROCESS") ||
+      PR_GetEnv("MOZ_DEBUG_CHILD_PAUSE")) {
+#  if defined(XP_LINUX) && defined(DEBUG)
+    if (prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0) != 0) {
+      printf_stderr("Could not allow ptrace from any process.\n");
+    }
+#  endif
+    printf_stderr(
+        "\n\nCHILDCHILDCHILDCHILD (process type %s)\n  debug me @ %d\n\n",
+        XRE_GetProcessTypeString(), base::GetCurrentProcId());
+    sleep(GetDebugChildPauseTime());
+  }
+#elif defined(OS_WIN)
+  if (PR_GetEnv("MOZ_DEBUG_CHILD_PROCESS")) {
+    NS_DebugBreak(NS_DEBUG_BREAK,
+                  "Invoking NS_DebugBreak() to debug child process", nullptr,
+                  __FILE__, __LINE__);
+  } else if (PR_GetEnv("MOZ_DEBUG_CHILD_PAUSE")) {
+    printf_stderr(
+        "\n\nCHILDCHILDCHILDCHILD (process type %s)\n  debug me @ %lu\n\n",
+        XRE_GetProcessTypeString(), base::GetCurrentProcId());
+    ::Sleep(GetDebugChildPauseTime());
+  }
+#endif
+
+#ifdef MOZ_WIDGET_ANDROID
+  // The parent process already did this, but Gecko child processes on
+  // Android aren't descendants of the parent process, so they don't
+  // inherit its rlimits.
+  mozilla::startup::IncreaseDescriptorLimits();
+#endif
+
+  // child processes launched by GeckoChildProcessHost get this magic
+  // argument appended to their command lines
+  const char* const parentPIDString = aArgv[aArgc - 1];
+  MOZ_ASSERT(parentPIDString, "NULL parent PID");
+  --aArgc;
+
+  char* end = 0;
+  base::ProcessId parentPID = strtol(parentPIDString, &end, 10);
+  MOZ_ASSERT(!*end, "invalid parent PID");
+
+  // They also get the initial message channel ID passed in the same manner.
+  const char* const messageChannelIdString = aArgv[aArgc - 1];
+  MOZ_ASSERT(messageChannelIdString, "NULL MessageChannel Id");
+  --aArgc;
+
+  nsID messageChannelId{};
+  if (!messageChannelId.Parse(messageChannelIdString)) {
+    return NS_ERROR_FAILURE;
+  }
+
+#if defined(XP_WIN)
+  // On Win7+, when not running as an MSIX package, register the application
+  // user model id passed in by parent. This ensures windows created by the
+  // container properly group with the parent app on the Win7 taskbar.
+  // MSIX packages explicitly do not support setting the appid from within
+  // the app, as it is set in the package manifest instead.
+  const char* const appModelUserId = aArgv[--aArgc];
+  if (appModelUserId && !mozilla::widget::WinUtils::HasPackageIdentity()) {
+    // '-' implies no support
+    if (*appModelUserId != '-') {
+      nsString appId;
+      CopyASCIItoUTF16(nsDependentCString(appModelUserId), appId);
+      // The version string is encased in quotes
+      appId.Trim("\"");
+      // Set the id
+      SetTaskbarGroupId(appId);
+    }
+  }
+#endif
+
+  base::AtExitManager exitManager;
+
+  nsresult rv = XRE_InitCommandLine(aArgc, aArgv);
+  if (NS_FAILED(rv)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  MessageLoop::Type uiLoopType;
+  switch (XRE_GetProcessType()) {
+    case GeckoProcessType_Content:
+    case GeckoProcessType_GPU:
+    case GeckoProcessType_IPDLUnitTest:
+    case GeckoProcessType_VR:
+    case GeckoProcessType_RDD:
+    case GeckoProcessType_Socket:
+    case GeckoProcessType_Utility:
+      // Content processes need the XPCOM/chromium frankenventloop
+      uiLoopType = MessageLoop::TYPE_MOZILLA_CHILD;
+      break;
+    case GeckoProcessType_GMPlugin:
+    case GeckoProcessType_RemoteSandboxBroker:
+      uiLoopType = MessageLoop::TYPE_DEFAULT;
+      break;
+    default:
+      uiLoopType = MessageLoop::TYPE_UI;
+      break;
+  }
+
+#if defined(XP_WIN)
+#  if defined(MOZ_SANDBOX)
+  if (aChildData->sandboxBrokerServices) {
+    SandboxBroker::Initialize(aChildData->sandboxBrokerServices);
+    SandboxBroker::GeckoDependentInitialize();
+  }
+#  endif  // defined(MOZ_SANDBOX)
+
+  {
+    DebugOnly<bool> result = mozilla::WindowsBCryptInitialization();
+    MOZ_ASSERT(result);
+  }
+#endif  // defined(XP_WIN)
+
+  {
+    // This is a lexical scope for the MessageLoop below.  We want it
+    // to go out of scope before NS_LogTerm() so that we don't get
+    // spurious warnings about XPCOM objects being destroyed from a
+    // static context.
+
+    Maybe<IOInterposerInit> ioInterposerGuard;
+
+    // Associate this thread with a UI MessageLoop
+    MessageLoop uiMessageLoop(uiLoopType);
+    {
+      UniquePtr<ProcessChild> process;
+      switch (XRE_GetProcessType()) {
+        case GeckoProcessType_Default:
+          MOZ_CRASH("This makes no sense");
+          break;
+
+        case GeckoProcessType_Content:
+          ioInterposerGuard.emplace();
+          process = MakeUnique<ContentProcess>(parentPID, messageChannelId);
+          break;
+
+        case GeckoProcessType_IPDLUnitTest:
+          MOZ_RELEASE_ASSERT(mozilla::_ipdltest::gMakeIPDLUnitTestProcessChild,
+                             "xul-gtest not loaded!");
+          process = mozilla::_ipdltest::gMakeIPDLUnitTestProcessChild(
+              parentPID, messageChannelId);
+          break;
+
+        case GeckoProcessType_GMPlugin:
+          process =
+              MakeUnique<gmp::GMPProcessChild>(parentPID, messageChannelId);
+          break;
+
+        case GeckoProcessType_GPU:
+          process =
+              MakeUnique<gfx::GPUProcessImpl>(parentPID, messageChannelId);
+          break;
+
+        case GeckoProcessType_VR:
+          process =
+              MakeUnique<gfx::VRProcessChild>(parentPID, messageChannelId);
+          break;
+
+        case GeckoProcessType_RDD:
+          process = MakeUnique<RDDProcessImpl>(parentPID, messageChannelId);
+          break;
+
+        case GeckoProcessType_Socket:
+          ioInterposerGuard.emplace();
+          process =
+              MakeUnique<net::SocketProcessImpl>(parentPID, messageChannelId);
+          break;
+
+        case GeckoProcessType_Utility:
+          process =
+              MakeUnique<ipc::UtilityProcessImpl>(parentPID, messageChannelId);
+          break;
+
+#if defined(MOZ_SANDBOX) && defined(XP_WIN)
+        case GeckoProcessType_RemoteSandboxBroker:
+          process = MakeUnique<RemoteSandboxBrokerProcessChild>(
+              parentPID, messageChannelId);
+          break;
+#endif
+
+#if defined(MOZ_ENABLE_FORKSERVER)
+        case GeckoProcessType_ForkServer:
+          MOZ_CRASH("Fork server should not go here");
+          break;
+#endif
+        default:
+          MOZ_CRASH("Unknown main thread class");
+      }
+
+      if (!process->Init(aArgc, aArgv)) {
+        return NS_ERROR_FAILURE;
+      }
+
+#if defined(XP_WIN)
+      // Set child processes up such that they will get killed after the
+      // chrome process is killed in cases where the user shuts the system
+      // down or logs off.
+      ::SetProcessShutdownParameters(0x280 - 1, SHUTDOWN_NORETRY);
+
+      RefPtr<DllServices> dllSvc(DllServices::Get());
+      auto dllSvcDisable =
+          MakeScopeExit([&dllSvc]() { dllSvc->DisableFull(); });
+#endif
+
+#if defined(MOZ_SANDBOX) && defined(XP_WIN)
+      // We need to do this after the process has been initialised, as
+      // InitLoggingIfRequired may need access to prefs.
+      mozilla::sandboxing::InitLoggingIfRequired(
+          aChildData->ProvideLogFunction);
+#endif
+      if (XRE_GetProcessType() != GeckoProcessType_RemoteSandboxBroker) {
+        // Remote sandbox launcher process doesn't have prerequisites for
+        // these...
+        mozilla::FilePreferences::InitDirectoriesAllowlist();
+        mozilla::FilePreferences::InitPrefs();
+        OverrideDefaultLocaleIfNeeded();
+      }
+
+#if defined(MOZ_SANDBOX)
+      AddContentSandboxLevelAnnotation();
+#endif
+
+      // Run the UI event loop on the main thread.
+      uiMessageLoop.MessageLoop::Run();
+
+      // Allow ProcessChild to clean up after itself before going out of
+      // scope and being deleted
+      process->CleanUp();
+      mozilla::Omnijar::CleanUp();
+    }
+  }
+
+  CrashReporter::UnsetRemoteExceptionHandler(exceptionHandlerIsSet);
+
+  return XRE_DeinitCommandLine();
+}
+
+MessageLoop* XRE_GetIOMessageLoop() {
+  if (GetGeckoProcessType() == GeckoProcessType_Default) {
+    return BrowserProcessSubThread::GetMessageLoop(BrowserProcessSubThread::IO);
+  }
+  return IOThreadChild::message_loop();
+}
+
+nsresult XRE_RunAppShell() {
+  nsCOMPtr<nsIAppShell> appShell(do_GetService(kAppShellCID));
+  NS_ENSURE_TRUE(appShell, NS_ERROR_FAILURE);
+#if defined(XP_MACOSX)
+  if (XRE_UseNativeEventProcessing()) {
+    // In content processes that want XPCOM (and hence want
+    // AppShell), we usually run our hybrid event loop through
+    // MessagePump::Run(), by way of nsBaseAppShell::Run().  The
+    // Cocoa nsAppShell impl, however, implements its own Run()
+    // that's unaware of MessagePump.  That's all rather suboptimal,
+    // but oddly enough not a problem... usually.
+    //
+    // The problem with this setup comes during startup.
+    // XPCOM-in-subprocesses depends on IPC, e.g. to init the pref
+    // service, so we have to init IPC first.  But, IPC also
+    // indirectly kinda-depends on XPCOM, because MessagePump
+    // schedules work from off-main threads (e.g. IO thread) by
+    // using NS_DispatchToMainThread().  If the IO thread receives a
+    // Message from the parent before nsThreadManager is
+    // initialized, then DispatchToMainThread() will fail, although
+    // MessagePump will remember the task.  This race condition
+    // isn't a problem when appShell->Run() ends up in
+    // MessagePump::Run(), because MessagePump will immediate see it
+    // has work to do.  It *is* a problem when we end up in [NSApp
+    // run], because it's not aware that MessagePump has work that
+    // needs to be processed; that was supposed to be signaled by
+    // nsIRunnable(s).
+    //
+    // So instead of hacking Cocoa nsAppShell or rewriting the
+    // event-loop system, we compromise here by processing any tasks
+    // that might have been enqueued on MessagePump, *before*
+    // MessagePump::ScheduleWork was able to successfully
+    // DispatchToMainThread().
+    MessageLoop* loop = MessageLoop::current();
+    bool couldNest = loop->NestableTasksAllowed();
+
+    loop->SetNestableTasksAllowed(true);
+    RefPtr<Runnable> task = new MessageLoop::QuitTask();
+    loop->PostTask(task.forget());
+    loop->Run();
+
+    loop->SetNestableTasksAllowed(couldNest);
+  }
+#endif  // XP_MACOSX
+  return appShell->Run();
+}
+
+void XRE_ShutdownChildProcess() {
+  MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
+
+  mozilla::DebugOnly<MessageLoop*> ioLoop = XRE_GetIOMessageLoop();
+  MOZ_ASSERT(!!ioLoop, "Bad shutdown order");
+
+  // Quit() sets off the following chain of events
+  //  (1) UI loop starts quitting
+  //  (2) UI loop returns from Run() in XRE_InitChildProcess()
+  //  (3) ProcessChild goes out of scope and terminates the IO thread
+  //  (4) ProcessChild joins the IO thread
+  //  (5) exit()
+  MessageLoop::current()->Quit();
+
+#if defined(XP_MACOSX)
+  nsCOMPtr<nsIAppShell> appShell(do_GetService(kAppShellCID));
+  if (appShell) {
+    // On Mac, we might be only above nsAppShell::Run(), not
+    // MessagePump::Run().  See XRE_RunAppShell(). To account for
+    // that case, we fire off an Exit() here.  If we were indeed
+    // above MessagePump::Run(), this Exit() is just superfluous.
+    appShell->Exit();
+  }
+#endif  // XP_MACOSX
+}
+
+namespace {
+ContentParent* gContentParent;  // long-lived, manually refcounted
+TestShellParent* GetOrCreateTestShellParent() {
+  if (!gContentParent) {
+    // Use a "web" child process by default.  File a bug if you don't like
+    // this and you're sure you wouldn't be better off writing a "browser"
+    // chrome mochitest where you can have multiple types of content
+    // processes.
+    RefPtr<ContentParent> parent =
+        ContentParent::GetNewOrUsedBrowserProcess(DEFAULT_REMOTE_TYPE);
+    parent.forget(&gContentParent);
+  } else if (gContentParent->IsShuttingDown()) {
+    return nullptr;
+  }
+  TestShellParent* tsp = gContentParent->GetTestShellSingleton();
+  if (!tsp) {
+    tsp = gContentParent->CreateTestShell();
+  }
+  return tsp;
+}
+
+}  // namespace
+
+bool XRE_SendTestShellCommand(JSContext* aCx, JSString* aCommand,
+                              JS::Value* aCallback) {
+  JS::Rooted<JSString*> cmd(aCx, aCommand);
+  TestShellParent* tsp = GetOrCreateTestShellParent();
+  NS_ENSURE_TRUE(tsp, false);
+
+  nsAutoJSString command;
+  NS_ENSURE_TRUE(command.init(aCx, cmd), false);
+
+  if (!aCallback) {
+    return tsp->SendExecuteCommand(command);
+  }
+
+  TestShellCommandParent* callback = static_cast<TestShellCommandParent*>(
+      tsp->SendPTestShellCommandConstructor(command));
+  NS_ENSURE_TRUE(callback, false);
+
+  NS_ENSURE_TRUE(callback->SetCallback(aCx, *aCallback), false);
+
+  return true;
+}
+
+bool XRE_ShutdownTestShell() {
+  if (!gContentParent) {
+    return true;
+  }
+  bool ret = true;
+  if (gContentParent->IsAlive()) {
+    ret = gContentParent->DestroyTestShell(
+        gContentParent->GetTestShellSingleton());
+  }
+  NS_RELEASE(gContentParent);
+  return ret;
+}
+
+#ifdef MOZ_X11
+void XRE_InstallX11ErrorHandler() {
+#  ifdef MOZ_WIDGET_GTK
+  InstallGdkErrorHandler();
+#  endif
+
+  // Ensure our X11 error handler overrides the default GDK error handler such
+  // that errors are ignored by default. GDK will install its own error handler
+  // temporarily when pushing error traps internally as needed. This avoids us
+  // otherwise having to frequently override the error handler merely to trap
+  // errors in multiple places that would otherwise contend with GDK or other
+  // libraries that might also override the handler.
+  InstallX11ErrorHandler();
+}
+
+void XRE_CleanupX11ErrorHandler() { CleanupX11ErrorHandler(); }
+#endif
+
+#ifdef MOZ_ENABLE_FORKSERVER
+int XRE_ForkServer(int* aArgc, char*** aArgv) {
+  return mozilla::ipc::ForkServer::RunForkServer(aArgc, aArgv) ? 1 : 0;
+}
+#endif