ThreadStackHelper::ThreadStackHelper()
: mStackToFill(nullptr)
#ifdef MOZ_THREADSTACKHELPER_PSEUDO
, mPseudoStack(mozilla_get_pseudo_stack())
#ifdef MOZ_THREADSTACKHELPER_NATIVE
, mContextToFill(nullptr)
#endif
, mMaxStackSize(Stack::sMaxInlineStorage)
, mMaxBufferSize(0)
#endif
{
#if defined(XP_LINUX)
MOZ_ALWAYS_TRUE(!::sem_init(&mSem, 0, 0));
mThreadID = ::syscall(SYS_gettid);
#elif defined(XP_WIN)
mInitialized = !!::DuplicateHandle(
::GetCurrentProcess(), ::GetCurrentThread(),
::GetCurrentProcess(), &mThreadID,
THREAD_SUSPEND_RESUME
#ifdef MOZ_THREADSTACKHELPER_NATIVE
| THREAD_GET_CONTEXT | THREAD_QUERY_INFORMATION
#endif
, FALSE, 0);
MOZ_ASSERT(mInitialized);
#elif defined(XP_MACOSX)
mThreadID = mach_thread_self();
#endif
#ifdef MOZ_THREADSTACKHELPER_NATIVE
GetThreadStackBase();
#endif
}
ThreadStackHelper::ThreadStackHelper()
: mPseudoStack(mozilla_get_pseudo_stack())
, mStackBuffer()
, mMaxStackSize(mStackBuffer.capacity())
{
#if defined(XP_LINUX)
mThreadID = ::syscall(SYS_gettid);
#elif defined(XP_WIN)
mInitialized = !!::DuplicateHandle(
::GetCurrentProcess(), ::GetCurrentThread(),
::GetCurrentProcess(), &mThreadID,
THREAD_SUSPEND_RESUME, FALSE, 0);
MOZ_ASSERT(mInitialized);
#elif defined(XP_MACOSX)
mThreadID = mach_thread_self();
#endif
}
nsresult
ShutdownXPCOM(nsIServiceManager* aServMgr)
{
// Make sure the hang monitor is enabled for shutdown.
HangMonitor::NotifyActivity();
if (!NS_IsMainThread()) {
NS_RUNTIMEABORT("Shutdown on wrong thread");
}
nsresult rv;
nsCOMPtr<nsISimpleEnumerator> moduleLoaders;
// Notify observers of xpcom shutting down
{
// Block it so that the COMPtr will get deleted before we hit
// servicemanager shutdown
nsCOMPtr<nsIThread> thread = do_GetCurrentThread();
if (NS_WARN_IF(!thread)) {
return NS_ERROR_UNEXPECTED;
}
RefPtr<nsObserverService> observerService;
CallGetService("@mozilla.org/observer-service;1",
(nsObserverService**)getter_AddRefs(observerService));
if (observerService) {
observerService->NotifyObservers(nullptr,
NS_XPCOM_WILL_SHUTDOWN_OBSERVER_ID,
nullptr);
nsCOMPtr<nsIServiceManager> mgr;
rv = NS_GetServiceManager(getter_AddRefs(mgr));
if (NS_SUCCEEDED(rv)) {
observerService->NotifyObservers(mgr, NS_XPCOM_SHUTDOWN_OBSERVER_ID,
nullptr);
}
}
// This must happen after the shutdown of media and widgets, which
// are triggered by the NS_XPCOM_SHUTDOWN_OBSERVER_ID notification.
NS_ProcessPendingEvents(thread);
gfxPlatform::ShutdownLayersIPC();
mozilla::scache::StartupCache::DeleteSingleton();
if (observerService)
observerService->NotifyObservers(nullptr,
NS_XPCOM_SHUTDOWN_THREADS_OBSERVER_ID,
nullptr);
gXPCOMThreadsShutDown = true;
NS_ProcessPendingEvents(thread);
// Shutdown the timer thread and all timers that might still be alive before
// shutting down the component manager
nsTimerImpl::Shutdown();
NS_ProcessPendingEvents(thread);
// Shutdown all remaining threads. This method does not return until
// all threads created using the thread manager (with the exception of
// the main thread) have exited.
nsThreadManager::get()->Shutdown();
NS_ProcessPendingEvents(thread);
HangMonitor::NotifyActivity();
// Late-write checks needs to find the profile directory, so it has to
// be initialized before mozilla::services::Shutdown or (because of
// xpcshell tests replacing the service) modules being unloaded.
mozilla::InitLateWriteChecks();
// We save the "xpcom-shutdown-loaders" observers to notify after
// the observerservice is gone.
if (observerService) {
observerService->EnumerateObservers(NS_XPCOM_SHUTDOWN_LOADERS_OBSERVER_ID,
getter_AddRefs(moduleLoaders));
observerService->Shutdown();
}
}
// Free ClearOnShutdown()'ed smart pointers. This needs to happen *after*
// we've finished notifying observers of XPCOM shutdown, because shutdown
// observers themselves might call ClearOnShutdown().
mozilla::KillClearOnShutdown();
// XPCOM is officially in shutdown mode NOW
// Set this only after the observers have been notified as this
// will cause servicemanager to become inaccessible.
mozilla::services::Shutdown();
#ifdef DEBUG_dougt
fprintf(stderr, "* * * * XPCOM shutdown. Access will be denied * * * * \n");
#endif
// We may have AddRef'd for the caller of NS_InitXPCOM, so release it
// here again:
NS_IF_RELEASE(aServMgr);
// Shutdown global servicemanager
if (nsComponentManagerImpl::gComponentManager) {
nsComponentManagerImpl::gComponentManager->FreeServices();
}
// Release the directory service
NS_IF_RELEASE(nsDirectoryService::gService);
free(gGREBinPath);
gGREBinPath = nullptr;
if (moduleLoaders) {
bool more;
nsCOMPtr<nsISupports> el;
while (NS_SUCCEEDED(moduleLoaders->HasMoreElements(&more)) && more) {
moduleLoaders->GetNext(getter_AddRefs(el));
// Don't worry about weak-reference observers here: there is
// no reason for weak-ref observers to register for
// xpcom-shutdown-loaders
// FIXME: This can cause harmless writes from sqlite committing
// log files. We have to ignore them before we can move
// the mozilla::PoisonWrite call before this point. See bug
// 834945 for the details.
nsCOMPtr<nsIObserver> obs(do_QueryInterface(el));
if (obs) {
obs->Observe(nullptr, NS_XPCOM_SHUTDOWN_LOADERS_OBSERVER_ID, nullptr);
}
}
moduleLoaders = nullptr;
}
nsCycleCollector_shutdown();
layers::AsyncTransactionTrackersHolder::Finalize();
PROFILER_MARKER("Shutdown xpcom");
// If we are doing any shutdown checks, poison writes.
if (gShutdownChecks != SCM_NOTHING) {
#ifdef XP_MACOSX
mozilla::OnlyReportDirtyWrites();
#endif /* XP_MACOSX */
mozilla::BeginLateWriteChecks();
}
// Shutdown nsLocalFile string conversion
NS_ShutdownLocalFile();
#ifdef XP_UNIX
NS_ShutdownNativeCharsetUtils();
#endif
#if defined(XP_WIN)
// This exit(0) call is intended to be temporary, to get shutdown leak
// checking working on Linux.
// On Windows XP debug, there are intermittent failures in
// dom/media/tests/mochitest/test_peerConnection_basicH264Video.html
// if we don't exit early in a child process. See bug 1073310.
if (XRE_IsContentProcess() && !IsVistaOrLater()) {
NS_WARNING("Exiting child process early!");
exit(0);
}
#endif
// Shutdown xpcom. This will release all loaders and cause others holding
// a refcount to the component manager to release it.
if (nsComponentManagerImpl::gComponentManager) {
rv = (nsComponentManagerImpl::gComponentManager)->Shutdown();
NS_ASSERTION(NS_SUCCEEDED(rv), "Component Manager shutdown failed.");
} else {
NS_WARNING("Component Manager was never created ...");
}
#ifdef MOZ_ENABLE_PROFILER_SPS
// In optimized builds we don't do shutdown collections by default, so
// uncollected (garbage) objects may keep the nsXPConnect singleton alive,
// and its XPCJSRuntime along with it. However, we still destroy various
// bits of state in JS_ShutDown(), so we need to make sure the profiler
// can't access them when it shuts down. This call nulls out the
// JS pseudo-stack's internal reference to the main thread JSRuntime,
// duplicating the call in XPCJSRuntime::~XPCJSRuntime() in case that
// never fired.
if (PseudoStack* stack = mozilla_get_pseudo_stack()) {
stack->sampleRuntime(nullptr);
}
#endif
// Shut down the JS engine.
JS_ShutDown();
// Release our own singletons
// Do this _after_ shutting down the component manager, because the
// JS component loader will use XPConnect to call nsIModule::canUnload,
// and that will spin up the InterfaceInfoManager again -- bad mojo
XPTInterfaceInfoManager::FreeInterfaceInfoManager();
// Finally, release the component manager last because it unloads the
// libraries:
if (nsComponentManagerImpl::gComponentManager) {
nsrefcnt cnt;
NS_RELEASE2(nsComponentManagerImpl::gComponentManager, cnt);
NS_ASSERTION(cnt == 0, "Component Manager being held past XPCOM shutdown.");
}
nsComponentManagerImpl::gComponentManager = nullptr;
nsCategoryManager::Destroy();
NS_PurgeAtomTable();
NS_IF_RELEASE(gDebug);
delete sIOThread;
sIOThread = nullptr;
delete sMessageLoop;
sMessageLoop = nullptr;
if (sCommandLineWasInitialized) {
CommandLine::Terminate();
sCommandLineWasInitialized = false;
}
delete sExitManager;
sExitManager = nullptr;
Omnijar::CleanUp();
HangMonitor::Shutdown();
delete sMainHangMonitor;
sMainHangMonitor = nullptr;
BackgroundHangMonitor::Shutdown();
profiler_shutdown();
NS_LogTerm();
#if defined(MOZ_WIDGET_GONK)
// This exit(0) call is intended to be temporary, to get shutdown leak
// checking working on Linux.
// On debug B2G, the child process crashes very late. Instead, just
// give up so at least we exit cleanly. See bug 1071866.
if (XRE_IsContentProcess()) {
NS_WARNING("Exiting child process early!");
exit(0);
}
#endif
return NS_OK;
}
