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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
#include "ThreadEventTarget.h"
#include "XPCOMModule.h"
#include "base/basictypes.h"
#include "mozilla/AbstractThread.h"
#include "mozilla/AppShutdown.h"
#include "mozilla/Assertions.h"
#include "mozilla/Atomics.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Poison.h"
#include "mozilla/SharedThreadPool.h"
#include "mozilla/TaskController.h"
#include "mozilla/Unused.h"
#include "mozilla/XPCOM.h"
#include "mozJSModuleLoader.h"
#include "nsXULAppAPI.h"
#ifndef ANDROID
# include "nsTerminator.h"
#endif
#include "nsXPCOMPrivate.h"
#include "nsXPCOMCIDInternal.h"
#include "mozilla/dom/JSExecutionManager.h"
#include "mozilla/dom/SharedScriptCache.h"
#include "mozilla/SharedStyleSheetCache.h"
#include "mozilla/layers/ImageBridgeChild.h"
#include "mozilla/layers/CompositorBridgeParent.h"
#include "prlink.h"
#include "nsCycleCollector.h"
#include "nsObserverService.h"
#include "nsDebugImpl.h"
#include "nsSystemInfo.h"
#include "nsComponentManager.h"
#include "nsCategoryManagerUtils.h"
#include "nsIServiceManager.h"
#include "nsThreadManager.h"
#include "nsThreadPool.h"
#include "nsTimerImpl.h"
#include "TimerThread.h"
#include "nsThread.h"
#include "nsVersionComparatorImpl.h"
#include "nsIFile.h"
#include "nsLocalFile.h"
#include "nsDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsCategoryManager.h"
#include "nsMultiplexInputStream.h"
#include "nsAtomTable.h"
#include "nsISupportsImpl.h"
#include "nsLanguageAtomService.h"
#include "nsSystemInfo.h"
#include "nsMemoryReporterManager.h"
#include "nss.h"
#include "nsNSSComponent.h"
#include <locale.h>
#include "mozilla/Services.h"
#include "mozilla/Omnijar.h"
#include "mozilla/ScriptPreloader.h"
#include "mozilla/Telemetry.h"
#include "mozilla/BackgroundHangMonitor.h"
#include "mozilla/PoisonIOInterposer.h"
#include "mozilla/LateWriteChecks.h"
#include "mozilla/scache/StartupCache.h"
#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/message_loop.h"
#include "mozilla/ipc/IOThread.h"
#include "mozilla/AvailableMemoryTracker.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/CountingAllocatorBase.h"
#ifdef MOZ_PHC
# include "mozilla/PHCManager.h"
#endif
#include "mozilla/UniquePtr.h"
#include "mozilla/ServoStyleConsts.h"
#include "mozilla/ipc/GeckoChildProcessHost.h"
#include "ogg/ogg.h"
#include "GeckoProfiler.h"
#include "ProfilerControl.h"
#include "jsapi.h"
#include "js/Initialization.h"
#include "js/Prefs.h"
#include "mozilla/StaticPrefs_javascript.h"
#include "XPCSelfHostedShmem.h"
#include "gfxPlatform.h"
using base::AtExitManager;
using mozilla::ipc::IOThreadParent;
// From toolkit/library/rust/lib.rs
extern "C" void GkRust_Init();
extern "C" void GkRust_Shutdown();
namespace {
static AtExitManager* sExitManager;
static MessageLoop* sMessageLoop;
static bool sCommandLineWasInitialized;
static IOThreadParent* sIOThread;
static mozilla::BackgroundHangMonitor* sMainHangMonitor;
} /* anonymous namespace */
// Registry Factory creation function defined in nsRegistry.cpp
// We hook into this function locally to create and register the registry
// Since noone outside xpcom needs to know about this and nsRegistry.cpp
// does not have a local include file, we are putting this definition
// here rather than in nsIRegistry.h
extern nsresult NS_RegistryGetFactory(nsIFactory** aFactory);
extern nsresult NS_CategoryManagerGetFactory(nsIFactory**);
#ifdef XP_WIN
extern nsresult CreateAnonTempFileRemover();
#endif
nsresult nsThreadManagerGetSingleton(const nsIID& aIID, void** aInstancePtr) {
NS_ASSERTION(aInstancePtr, "null outptr");
return nsThreadManager::get().QueryInterface(aIID, aInstancePtr);
}
nsresult nsLocalFileConstructor(const nsIID& aIID, void** aInstancePtr) {
return nsLocalFile::nsLocalFileConstructor(aIID, aInstancePtr);
}
nsComponentManagerImpl* nsComponentManagerImpl::gComponentManager = nullptr;
bool gXPCOMShuttingDown = false;
bool gXPCOMMainThreadEventsAreDoomed = false;
char16_t* gGREBinPath = nullptr;
// gDebug will be freed during shutdown.
static nsIDebug2* gDebug = nullptr;
EXPORT_XPCOM_API(nsresult)
NS_GetDebug(nsIDebug2** aResult) {
return nsDebugImpl::Create(NS_GET_IID(nsIDebug2), (void**)aResult);
}
class ICUReporter final : public nsIMemoryReporter,
public mozilla::CountingAllocatorBase<ICUReporter> {
public:
NS_DECL_ISUPPORTS
static void* Alloc(const void*, size_t aSize) {
void* result = CountingMalloc(aSize);
if (result == nullptr) {
MOZ_CRASH("Ran out of memory while allocating for ICU");
}
return result;
}
static void* Realloc(const void*, void* aPtr, size_t aSize) {
void* result = CountingRealloc(aPtr, aSize);
if (result == nullptr) {
MOZ_CRASH("Ran out of memory while reallocating for ICU");
}
return result;
}
static void Free(const void*, void* aPtr) { return CountingFree(aPtr); }
private:
NS_IMETHOD
CollectReports(nsIHandleReportCallback* aHandleReport, nsISupports* aData,
bool aAnonymize) override {
MOZ_COLLECT_REPORT(
"explicit/icu", KIND_HEAP, UNITS_BYTES, MemoryAllocated(),
"Memory used by ICU, a Unicode and globalization support library.");
return NS_OK;
}
~ICUReporter() = default;
};
NS_IMPL_ISUPPORTS(ICUReporter, nsIMemoryReporter)
class OggReporter final : public nsIMemoryReporter,
public mozilla::CountingAllocatorBase<OggReporter> {
public:
NS_DECL_ISUPPORTS
private:
NS_IMETHOD
CollectReports(nsIHandleReportCallback* aHandleReport, nsISupports* aData,
bool aAnonymize) override {
MOZ_COLLECT_REPORT(
"explicit/media/libogg", KIND_HEAP, UNITS_BYTES, MemoryAllocated(),
"Memory allocated through libogg for Ogg, and related media "
"files.");
return NS_OK;
}
~OggReporter() = default;
};
NS_IMPL_ISUPPORTS(OggReporter, nsIMemoryReporter)
static bool sInitializedJS = false;
static void InitializeJS() {
#if defined(ENABLE_WASM_SIMD) && \
(defined(JS_CODEGEN_X64) || defined(JS_CODEGEN_X86))
// Update static engine preferences, such as AVX, before
// `JS_InitWithFailureDiagnostic` is called.
JS::SetAVXEnabled(mozilla::StaticPrefs::javascript_options_wasm_simd_avx());
#endif
if (XRE_IsParentProcess() &&
mozilla::StaticPrefs::javascript_options_main_process_disable_jit()) {
JS::DisableJitBackend();
}
// Set all JS::Prefs.
SET_JS_PREFS_FROM_BROWSER_PREFS;
const char* jsInitFailureReason = JS_InitWithFailureDiagnostic();
if (jsInitFailureReason) {
MOZ_CRASH_UNSAFE(jsInitFailureReason);
}
}
#define XPCOM_INIT_FATAL(message, res) \
if (XRE_IsParentProcess()) { \
return res; \
} \
MOZ_CRASH(message);
// Note that on OSX, aBinDirectory will point to .app/Contents/Resources/browser
EXPORT_XPCOM_API(nsresult)
NS_InitXPCOM(nsIServiceManager** aResult, nsIFile* aBinDirectory,
nsIDirectoryServiceProvider* aAppFileLocationProvider,
bool aInitJSContext) {
static bool sInitialized = false;
if (sInitialized) {
XPCOM_INIT_FATAL("!sInitialized", NS_ERROR_FAILURE)
}
sInitialized = true;
NS_LogInit();
NS_InitAtomTable();
// We don't have the arguments by hand here. If logging has already been
// initialized by a previous call to LogModule::Init with the arguments
// passed, passing (0, nullptr) is alright here.
mozilla::LogModule::Init(0, nullptr);
GkRust_Init();
nsresult rv = NS_OK;
// We are not shutting down
gXPCOMShuttingDown = false;
#ifdef XP_UNIX
// Discover the current value of the umask, and save it where
// nsSystemInfo::Init can retrieve it when necessary. There is no way
// to read the umask without changing it, and the setting is process-
// global, so this must be done while we are still single-threaded; the
// nsSystemInfo object is typically created much later, when some piece
// of chrome JS wants it. The system call is specified as unable to fail.
nsSystemInfo::gUserUmask = ::umask(0777);
::umask(nsSystemInfo::gUserUmask);
#endif
// Set up chromium libs
NS_ASSERTION(!sExitManager && !sMessageLoop, "Bad logic!");
if (!AtExitManager::AlreadyRegistered()) {
sExitManager = new AtExitManager();
}
MessageLoop* messageLoop = MessageLoop::current();
if (!messageLoop) {
sMessageLoop = new MessageLoopForUI(MessageLoop::TYPE_MOZILLA_PARENT);
sMessageLoop->set_thread_name("Gecko");
// Set experimental values for main thread hangs:
// 128ms for transient hangs and 8192ms for permanent hangs
sMessageLoop->set_hang_timeouts(128, 8192);
} else if (messageLoop->type() == MessageLoop::TYPE_MOZILLA_CHILD) {
messageLoop->set_thread_name("Gecko_Child");
messageLoop->set_hang_timeouts(128, 8192);
}
// Start the IPC I/O thread in the parent process. We'll have already started
// the IPC I/O thread if we're in a content process.
if (XRE_IsParentProcess()) {
sIOThread = new IOThreadParent();
}
MOZ_ASSERT(mozilla::ipc::IOThread::Get(), "An IOThread has been started");
// Establish the main thread here.
rv = nsThreadManager::get().Init();
if (NS_WARN_IF(NS_FAILED(rv))) {
XPCOM_INIT_FATAL("nsThreadManager::get().Init()", rv)
}
// Initialise the profiler
AUTO_PROFILER_INIT2;
// Set up the timer globals/timer thread
rv = nsTimerImpl::Startup();
if (NS_WARN_IF(NS_FAILED(rv))) {
XPCOM_INIT_FATAL("nsTimerImpl::Startup()", rv)
}
#ifndef ANDROID
// If the locale hasn't already been setup by our embedder,
// get us out of the "C" locale and into the system
if (strcmp(setlocale(LC_ALL, nullptr), "C") == 0) {
setlocale(LC_ALL, "");
}
#endif
nsDirectoryService::RealInit();
bool value;
if (aBinDirectory) {
rv = aBinDirectory->IsDirectory(&value);
if (NS_SUCCEEDED(rv) && value) {
nsDirectoryService::gService->SetCurrentProcessDirectory(aBinDirectory);
}
}
if (aAppFileLocationProvider) {
rv = nsDirectoryService::gService->RegisterProvider(
aAppFileLocationProvider);
if (NS_FAILED(rv)) {
XPCOM_INIT_FATAL("nsDirectoryService::gService->RegisterProvider()", rv)
}
}
nsCOMPtr<nsIFile> xpcomLib;
nsDirectoryService::gService->Get(NS_GRE_BIN_DIR, NS_GET_IID(nsIFile),
getter_AddRefs(xpcomLib));
MOZ_ASSERT(xpcomLib);
// set gGREBinPath
nsAutoString path;
xpcomLib->GetPath(path);
gGREBinPath = ToNewUnicode(path);
xpcomLib->AppendNative(nsDependentCString(XPCOM_DLL));
nsDirectoryService::gService->Set(NS_XPCOM_LIBRARY_FILE, xpcomLib);
if (!mozilla::Omnijar::IsInitialized()) {
// If you added a new process type that uses NS_InitXPCOM, and you're
// *sure* you don't want NS_InitMinimalXPCOM: in addition to everything
// else you'll probably have to do, please add it to the case in
// GeckoChildProcessHost.cpp which sets the greomni/appomni flags.
MOZ_ASSERT(XRE_IsParentProcess() || XRE_IsContentProcess());
// Note that the Omnijar::FallibleInit does not fail but returns NS_OK if
// the file is not found at all, as this is an expected possible way of
// running with an unpacked modules directory.
nsresult rv = mozilla::Omnijar::FallibleInit();
if (NS_FAILED(rv)) {
XPCOM_INIT_FATAL("Omnijar::Init()", NS_ERROR_OMNIJAR_CORRUPT)
}
}
if ((sCommandLineWasInitialized = !CommandLine::IsInitialized())) {
#ifdef XP_WIN
CommandLine::Init(0, nullptr);
#else
nsCOMPtr<nsIFile> binaryFile;
nsDirectoryService::gService->Get(NS_XPCOM_CURRENT_PROCESS_DIR,
NS_GET_IID(nsIFile),
getter_AddRefs(binaryFile));
if (NS_WARN_IF(!binaryFile)) {
XPCOM_INIT_FATAL("!binaryFile", NS_ERROR_FAILURE)
}
rv = binaryFile->AppendNative("nonexistent-executable"_ns);
if (NS_WARN_IF(NS_FAILED(rv))) {
XPCOM_INIT_FATAL("binaryFile->AppendNative()", rv)
}
nsCString binaryPath;
rv = binaryFile->GetNativePath(binaryPath);
if (NS_WARN_IF(NS_FAILED(rv))) {
XPCOM_INIT_FATAL("binaryFile->GetNativePath", rv)
}
static char const* const argv = {strdup(binaryPath.get())};
CommandLine::Init(1, &argv);
#endif
}
NS_ASSERTION(nsComponentManagerImpl::gComponentManager == nullptr,
"CompMgr not null at init");
// Create the Component/Service Manager
nsComponentManagerImpl::gComponentManager = new nsComponentManagerImpl();
NS_ADDREF(nsComponentManagerImpl::gComponentManager);
// Global cycle collector initialization.
if (!nsCycleCollector_init()) {
XPCOM_INIT_FATAL("nsCycleCollector_init()", NS_ERROR_UNEXPECTED)
}
// And start it up for this thread too.
nsCycleCollector_startup();
// Register ICU memory functions. This really shouldn't be necessary: the
// JS engine should do this on its own inside JS_Init, and memory-reporting
// code should call a JSAPI function to observe ICU memory usage. But we
// can't define the alloc/free functions in the JS engine, because it can't
// depend on the XPCOM-based memory reporting goop. So for now, we have
// this oddness.
mozilla::SetICUMemoryFunctions();
// Do the same for libogg.
ogg_set_mem_functions(
OggReporter::CountingMalloc, OggReporter::CountingCalloc,
OggReporter::CountingRealloc, OggReporter::CountingFree);
// Initialize the JS engine.
InitializeJS();
sInitializedJS = true;
rv = nsComponentManagerImpl::gComponentManager->Init();
if (NS_FAILED(rv)) {
NS_RELEASE(nsComponentManagerImpl::gComponentManager);
XPCOM_INIT_FATAL("gComponentManager->Init()", rv)
}
if (aResult) {
NS_ADDREF(*aResult = nsComponentManagerImpl::gComponentManager);
}
#ifdef MOZ_PHC
// This is the earliest possible moment we can start PHC while still being
// able to read prefs.
mozilla::InitPHCState();
#endif
// After autoreg, but before we actually instantiate any components,
// add any services listed in the "xpcom-directory-providers" category
// to the directory service.
nsDirectoryService::gService->RegisterCategoryProviders();
// Now that both the profiler and directory services have been started
// we can find the download directory, where the profiler can write
// profiles if necessary
profiler_lookup_async_signal_dump_directory();
// Init mozilla::SharedThreadPool (which needs the service manager).
mozilla::SharedThreadPool::InitStatics();
mozilla::scache::StartupCache::GetSingleton();
mozilla::AvailableMemoryTracker::Init();
// Notify observers of xpcom autoregistration start
NS_CreateServicesFromCategory(NS_XPCOM_STARTUP_CATEGORY, nullptr,
NS_XPCOM_STARTUP_OBSERVER_ID);
#ifdef XP_WIN
CreateAnonTempFileRemover();
#endif
// The memory reporter manager is up and running -- register our reporters.
RegisterStrongMemoryReporter(new ICUReporter());
RegisterStrongMemoryReporter(new OggReporter());
xpc::SelfHostedShmem::GetSingleton().InitMemoryReporter();
mozilla::Telemetry::Init();
mozilla::BackgroundHangMonitor::Startup();
const MessageLoop* const loop = MessageLoop::current();
sMainHangMonitor = new mozilla::BackgroundHangMonitor(
loop->thread_name().c_str(), loop->transient_hang_timeout(),
loop->permanent_hang_timeout());
mozilla::dom::JSExecutionManager::Initialize();
if (aInitJSContext) {
xpc::InitializeJSContext();
}
return NS_OK;
}
#undef XPCOM_INIT_FATAL
EXPORT_XPCOM_API(nsresult)
NS_InitMinimalXPCOM() {
NS_SetMainThread();
mozilla::TimeStamp::Startup();
NS_LogInit();
NS_InitAtomTable();
// We don't have the arguments by hand here. If logging has already been
// initialized by a previous call to LogModule::Init with the arguments
// passed, passing (0, nullptr) is alright here.
mozilla::LogModule::Init(0, nullptr);
GkRust_Init();
nsresult rv = nsThreadManager::get().Init();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Set up the timer globals/timer thread.
rv = nsTimerImpl::Startup();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Create the Component/Service Manager
nsComponentManagerImpl::gComponentManager = new nsComponentManagerImpl();
NS_ADDREF(nsComponentManagerImpl::gComponentManager);
rv = nsComponentManagerImpl::gComponentManager->Init();
if (NS_FAILED(rv)) {
NS_RELEASE(nsComponentManagerImpl::gComponentManager);
return rv;
}
// Global cycle collector initialization.
if (!nsCycleCollector_init()) {
return NS_ERROR_UNEXPECTED;
}
mozilla::SharedThreadPool::InitStatics();
mozilla::Telemetry::Init();
mozilla::BackgroundHangMonitor::Startup();
return NS_OK;
}
//
// NS_ShutdownXPCOM()
//
// The shutdown sequence for xpcom would be
//
// - Notify "xpcom-shutdown" for modules to release primary (root) references
// - Shutdown XPCOM timers
// - Notify "xpcom-shutdown-threads" for thread joins
// - Shutdown the event queues
// - Release the Global Service Manager
// - Release all service instances held by the global service manager
// - Release the Global Service Manager itself
// - Release the Component Manager
// - Release all factories cached by the Component Manager
// - Notify module loaders to shut down
// - Unload Libraries
// - Release Contractid Cache held by Component Manager
// - Release dll abstraction held by Component Manager
// - Release the Registry held by Component Manager
// - Finally, release the component manager itself
//
EXPORT_XPCOM_API(nsresult)
NS_ShutdownXPCOM(nsIServiceManager* aServMgr) {
return mozilla::ShutdownXPCOM(aServMgr);
}
namespace mozilla {
void SetICUMemoryFunctions() {
static bool sICUReporterInitialized = false;
if (!sICUReporterInitialized) {
if (!JS_SetICUMemoryFunctions(ICUReporter::Alloc, ICUReporter::Realloc,
ICUReporter::Free)) {
MOZ_CRASH("JS_SetICUMemoryFunctions failed.");
}
sICUReporterInitialized = true;
}
}
nsresult ShutdownXPCOM(nsIServiceManager* aServMgr) {
// Make sure the hang monitor is enabled for shutdown.
BackgroundHangMonitor().NotifyActivity();
if (!NS_IsMainThread()) {
MOZ_CRASH("Shutdown on wrong thread");
}
// 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;
}
mozilla::AppShutdown::AdvanceShutdownPhase(
mozilla::ShutdownPhase::XPCOMWillShutdown);
// We want the service manager to be the subject of notifications
nsCOMPtr<nsIServiceManager> mgr;
Unused << NS_GetServiceManager(getter_AddRefs(mgr));
MOZ_DIAGNOSTIC_ASSERT(mgr != nullptr, "Service manager not present!");
mozilla::AppShutdown::AdvanceShutdownPhase(
mozilla::ShutdownPhase::XPCOMShutdown, nullptr, do_QueryInterface(mgr));
// This must happen after the shutdown of media and widgets, which
// are triggered by the NS_XPCOM_SHUTDOWN_OBSERVER_ID notification.
gfxPlatform::ShutdownLayersIPC();
mozilla::AppShutdown::AdvanceShutdownPhase(
mozilla::ShutdownPhase::XPCOMShutdownThreads);
#ifdef DEBUG
// Prime an assertion at ThreadEventTarget::Dispatch to avoid late
// dispatches to non main-thread threads.
ThreadEventTarget::XPCOMShutdownThreadsNotificationFinished();
#endif
// Shutdown the timer thread and all timers that might still be alive
nsTimerImpl::Shutdown();
// Have an extra round of processing after the timers went away.
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().ShutdownNonMainThreads();
RefPtr<nsObserverService> observerService;
CallGetService("@mozilla.org/observer-service;1",
(nsObserverService**)getter_AddRefs(observerService));
if (observerService) {
observerService->Shutdown();
}
#ifdef NS_FREE_PERMANENT_DATA
// In leak-checking / ASAN / etc. builds, shut down the Servo thread-pool,
// which will wait for all the work to be done. For other builds, we don't
// really want to wait on shutdown for possibly slow tasks.
Servo_ShutdownThreadPool();
#endif
// XPCOMShutdownFinal is the default phase for ClearOnShutdown.
// This AdvanceShutdownPhase will thus free most ClearOnShutdown()'ed
// smart pointers. Some destructors may fire extra main thread runnables
// that will be processed inside AdvanceShutdownPhase.
AppShutdown::AdvanceShutdownPhase(ShutdownPhase::XPCOMShutdownFinal);
// Shutdown the main thread, processing our very last round of events, and
// then mark that we've finished main thread event processing.
nsThreadManager::get().ShutdownMainThread();
gXPCOMMainThreadEventsAreDoomed = true;
BackgroundHangMonitor().NotifyActivity();
mozilla::dom::JSExecutionManager::Shutdown();
}
// 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();
// 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();
}
// Remove the remaining main thread representations
nsThreadManager::get().ReleaseMainThread();
AbstractThread::ShutdownMainThread();
// Release the directory service
nsDirectoryService::gService = nullptr;
free(gGREBinPath);
gGREBinPath = nullptr;
// 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.
mozJSModuleLoader::UnloadLoaders();
// Clear the profiler's JS context before cycle collection. The profiler will
// notify the JS engine that it can let go of any data it's holding on to for
// profiling purposes.
PROFILER_CLEAR_JS_CONTEXT();
bool shutdownCollect;
#ifdef NS_FREE_PERMANENT_DATA
shutdownCollect = true;
#else
shutdownCollect = !!PR_GetEnv("MOZ_CC_RUN_DURING_SHUTDOWN");
#endif
nsCycleCollector_shutdown(shutdownCollect);
// There can be code trying to refer to global objects during the final cc
// shutdown. This is the phase for such global objects to correctly release.
AppShutdown::AdvanceShutdownPhase(ShutdownPhase::CCPostLastCycleCollection);
mozilla::scache::StartupCache::DeleteSingleton();
mozilla::ScriptPreloader::DeleteSingleton();
PROFILER_MARKER_UNTYPED("Shutdown xpcom", OTHER);
// Shutdown xpcom. This will release all loaders and cause others holding
// a refcount to the component manager to release it.
if (nsComponentManagerImpl::gComponentManager) {
DebugOnly<nsresult> rv =
(nsComponentManagerImpl::gComponentManager)->Shutdown();
NS_ASSERTION(NS_SUCCEEDED(rv.value), "Component Manager shutdown failed.");
} else {
NS_WARNING("Component Manager was never created ...");
}
if (sInitializedJS) {
// Shut down the JS engine.
JS_ShutDown();
sInitializedJS = false;
}
mozilla::ScriptPreloader::DeleteCacheDataSingleton();
mozilla::dom::SharedScriptCache::DeleteSingleton();
mozilla::SharedStyleSheetCache::DeleteSingleton();
// Release shared memory which might be borrowed by the JS engine.
xpc::SelfHostedShmem::Shutdown();
// After all threads have been joined and the component manager has been shut
// down, any remaining objects that could be holding NSS resources (should)
// have been released, so we can safely shut down NSS.
if (NSS_IsInitialized()) {
nsNSSComponent::DoClearSSLExternalAndInternalSessionCache();
if (NSS_Shutdown() != SECSuccess) {
// If you're seeing this crash and/or warning, some NSS resources are
// still in use (see bugs 1417680 and 1230312). Set the environment
// variable 'MOZ_IGNORE_NSS_SHUTDOWN_LEAKS' to some value to ignore this.
// Also, if leak checking is enabled, report this as a fake leak instead
// of crashing.
#if defined(DEBUG) && !defined(ANDROID)
if (!getenv("MOZ_IGNORE_NSS_SHUTDOWN_LEAKS") &&
!getenv("XPCOM_MEM_BLOAT_LOG") && !getenv("XPCOM_MEM_LEAK_LOG") &&
!getenv("XPCOM_MEM_REFCNT_LOG") && !getenv("XPCOM_MEM_COMPTR_LOG")) {
MOZ_CRASH("NSS_Shutdown failed");
} else {
# ifdef NS_BUILD_REFCNT_LOGGING
// Create a fake leak.
NS_LogCtor((void*)0x100, "NSSShutdownFailed", 100);
# endif // NS_BUILD_REFCNT_LOGGING
NS_WARNING("NSS_Shutdown failed");
}
#else
NS_WARNING("NSS_Shutdown failed");
#endif // defined(DEBUG) && !defined(ANDROID)
}
}
// 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();
nsLanguageAtomService::Shutdown();
GkRust_Shutdown();
#ifdef NS_FREE_PERMANENT_DATA
// As we do shutdown Servo only in leak-checking builds, there may still
// be async parse tasks going on in the Servo thread-pool in other builds.
// CSS parsing heavily uses the atom table, so we can safely drop it only
// if Servo has been stopped, too.
NS_ShutdownAtomTable();
#endif
NS_IF_RELEASE(gDebug);
delete sIOThread;
sIOThread = nullptr;
delete sMessageLoop;
sMessageLoop = nullptr;
mozilla::TaskController::Shutdown();
if (sCommandLineWasInitialized) {
CommandLine::Terminate();
sCommandLineWasInitialized = false;
}
delete sExitManager;
sExitManager = nullptr;
Omnijar::CleanUp();
BackgroundHangMonitor::Shutdown();
delete sMainHangMonitor;
sMainHangMonitor = nullptr;
NS_LogTerm();
return NS_OK;
}
} // namespace mozilla