diff options
Diffstat (limited to 'dom/ipc/ContentChild.cpp')
| -rw-r--r-- | dom/ipc/ContentChild.cpp | 5081 |
1 files changed, 5081 insertions, 0 deletions
diff --git a/dom/ipc/ContentChild.cpp b/dom/ipc/ContentChild.cpp new file mode 100644 index 0000000000..e3b0ebd795 --- /dev/null +++ b/dom/ipc/ContentChild.cpp @@ -0,0 +1,5081 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=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 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifdef MOZ_WIDGET_ANDROID +# include "AndroidDecoderModule.h" +#endif + +#include "BrowserChild.h" +#include "nsNSSComponent.h" +#include "ContentChild.h" +#include "GeckoProfiler.h" +#include "HandlerServiceChild.h" +#include "nsXPLookAndFeel.h" +#include "mozilla/AppShutdown.h" +#include "mozilla/Attributes.h" +#include "mozilla/BackgroundHangMonitor.h" +#include "mozilla/BenchmarkStorageChild.h" +#include "mozilla/FOGIPC.h" +#include "GMPServiceChild.h" +#include "Geolocation.h" +#include "imgLoader.h" +#include "ScrollingMetrics.h" +#include "mozilla/BasePrincipal.h" +#include "mozilla/ClipboardReadRequestChild.h" +#include "mozilla/Components.h" +#include "mozilla/HangDetails.h" +#include "mozilla/LoadInfo.h" +#include "mozilla/Logging.h" +#include "mozilla/LookAndFeel.h" +#include "mozilla/MemoryTelemetry.h" +#include "mozilla/NullPrincipal.h" +#include "mozilla/PerfStats.h" +#include "mozilla/Preferences.h" +#include "mozilla/ProcessHangMonitorIPC.h" +#include "mozilla/RemoteDecoderManagerChild.h" +#include "mozilla/RemoteLazyInputStreamChild.h" +#include "mozilla/SchedulerGroup.h" +#include "mozilla/ScopeExit.h" +#include "mozilla/SharedStyleSheetCache.h" +#include "mozilla/SimpleEnumerator.h" +#include "mozilla/SpinEventLoopUntil.h" +#include "mozilla/StaticPrefs_browser.h" +#include "mozilla/StaticPrefs_dom.h" +#include "mozilla/StaticPrefs_fission.h" +#include "mozilla/StaticPrefs_javascript.h" +#include "mozilla/StaticPrefs_media.h" +#include "mozilla/StaticPrefs_threads.h" +#include "mozilla/StorageAccessAPIHelper.h" +#include "mozilla/TelemetryIPC.h" +#include "mozilla/Unused.h" +#include "mozilla/WebBrowserPersistDocumentChild.h" +#include "mozilla/devtools/HeapSnapshotTempFileHelperChild.h" +#include "mozilla/dom/AutoSuppressEventHandlingAndSuspend.h" +#include "mozilla/dom/BlobImpl.h" +#include "mozilla/dom/BrowserBridgeHost.h" +#include "mozilla/dom/BrowsingContext.h" +#include "mozilla/dom/BrowsingContextGroup.h" +#include "mozilla/dom/ChildProcessChannelListener.h" +#include "mozilla/dom/ChildProcessMessageManager.h" +#include "mozilla/dom/ClientManager.h" +#include "mozilla/dom/ContentParent.h" +#include "mozilla/dom/ContentProcessManager.h" +#include "mozilla/dom/ContentPlaybackController.h" +#include "mozilla/dom/ContentProcessMessageManager.h" +#include "mozilla/dom/DataTransfer.h" +#include "mozilla/dom/DocGroup.h" +#include "mozilla/dom/ExternalHelperAppChild.h" +#include "mozilla/dom/GetFilesHelper.h" +#include "mozilla/dom/IPCBlobUtils.h" +#include "mozilla/dom/InProcessChild.h" +#include "mozilla/dom/JSActorService.h" +#include "mozilla/dom/JSProcessActorBinding.h" +#include "mozilla/dom/JSProcessActorChild.h" +#include "mozilla/dom/LSObject.h" +#include "mozilla/dom/MemoryReportRequest.h" +#include "mozilla/dom/PSessionStorageObserverChild.h" +#include "mozilla/dom/PostMessageEvent.h" +#include "mozilla/dom/PushNotifier.h" +#include "mozilla/dom/RemoteWorkerService.h" +#include "mozilla/dom/ScreenOrientation.h" +#include "mozilla/dom/ServiceWorkerManager.h" +#include "mozilla/dom/SessionStorageManager.h" +#include "mozilla/dom/URLClassifierChild.h" +#include "mozilla/dom/UserActivation.h" +#include "mozilla/dom/WindowGlobalChild.h" +#include "mozilla/dom/WorkerDebugger.h" +#include "mozilla/dom/WorkerDebuggerManager.h" +#include "mozilla/dom/ipc/SharedMap.h" +#include "mozilla/extensions/ExtensionsChild.h" +#include "mozilla/extensions/StreamFilterParent.h" +#include "mozilla/gfx/Logging.h" +#include "mozilla/gfx/gfxVars.h" +#include "mozilla/hal_sandbox/PHalChild.h" +#include "mozilla/intl/L10nRegistry.h" +#include "mozilla/intl/LocaleService.h" +#include "mozilla/ipc/BackgroundChild.h" +#include "mozilla/ipc/Endpoint.h" +#include "mozilla/ipc/FileDescriptorUtils.h" +#include "mozilla/ipc/GeckoChildProcessHost.h" +#include "mozilla/ipc/ProcessChild.h" +#include "mozilla/ipc/TestShellChild.h" +#include "mozilla/layers/APZChild.h" +#include "mozilla/layers/CompositorManagerChild.h" +#include "mozilla/layers/ContentProcessController.h" +#include "mozilla/layers/ImageBridgeChild.h" +#ifdef NS_PRINTING +# include "mozilla/layout/RemotePrintJobChild.h" +#endif +#include "mozilla/loader/ScriptCacheActors.h" +#include "mozilla/media/MediaChild.h" +#include "mozilla/net/CaptivePortalService.h" +#include "mozilla/net/ChildDNSService.h" +#include "mozilla/net/CookieServiceChild.h" +#include "mozilla/net/DocumentChannelChild.h" +#include "mozilla/net/HttpChannelChild.h" +#include "mozilla/widget/RemoteLookAndFeel.h" +#include "mozilla/widget/ScreenManager.h" +#include "mozilla/widget/WidgetMessageUtils.h" +#include "nsBaseDragService.h" +#include "nsDocShellLoadTypes.h" +#include "nsFocusManager.h" +#include "nsHttpHandler.h" +#include "nsIConsoleService.h" +#include "nsIInputStreamChannel.h" +#include "nsILayoutHistoryState.h" +#include "nsILoadGroup.h" +#include "nsIOpenWindowInfo.h" +#include "nsISimpleEnumerator.h" +#include "nsIStringBundle.h" +#include "nsIURIMutator.h" +#include "nsQueryObject.h" +#include "nsRefreshDriver.h" +#include "nsSandboxFlags.h" +#include "mozmemory.h" + +#include "ChildProfilerController.h" + +#if defined(MOZ_SANDBOX) +# include "mozilla/SandboxSettings.h" +# if defined(XP_WIN) +# include "mozilla/sandboxTarget.h" +# elif defined(XP_LINUX) +# include "CubebUtils.h" +# include "mozilla/Sandbox.h" +# include "mozilla/SandboxInfo.h" +# elif defined(XP_MACOSX) +# include <CoreGraphics/CGError.h> +# include "mozilla/Sandbox.h" +# elif defined(__OpenBSD__) +# include <err.h> +# include <sys/stat.h> +# include <unistd.h> + +# include <fstream> + +# include "BinaryPath.h" +# include "SpecialSystemDirectory.h" +# include "nsILineInputStream.h" +# include "mozilla/ipc/UtilityProcessSandboxing.h" +# endif +# if defined(MOZ_DEBUG) && defined(ENABLE_TESTS) +# include "mozilla/SandboxTestingChild.h" +# endif +#endif + +#include "SandboxHal.h" +#include "mozInlineSpellChecker.h" +#include "mozilla/GlobalStyleSheetCache.h" +#include "nsAnonymousTemporaryFile.h" +#include "nsCategoryManagerUtils.h" +#include "nsClipboardProxy.h" +#include "nsContentPermissionHelper.h" +#include "nsDebugImpl.h" +#include "nsDirectoryService.h" +#include "nsDirectoryServiceDefs.h" +#include "nsDirectoryServiceUtils.h" +#include "nsDocShell.h" +#include "nsDocShellLoadState.h" +#include "nsHashPropertyBag.h" +#include "nsIConsoleListener.h" +#include "nsICycleCollectorListener.h" +#include "nsIDocShellTreeOwner.h" +#include "nsIDocumentViewer.h" +#include "nsIDragService.h" +#include "nsIInterfaceRequestorUtils.h" +#include "nsIMemoryInfoDumper.h" +#include "nsIMemoryReporter.h" +#include "nsIObserverService.h" +#include "nsIOService.h" +#include "nsIScriptError.h" +#include "nsIScriptSecurityManager.h" +#include "nsJSEnvironment.h" +#include "nsJSUtils.h" +#include "nsMemoryInfoDumper.h" +#include "nsServiceManagerUtils.h" +#include "nsStyleSheetService.h" +#include "nsThreadManager.h" +#include "nsVariant.h" +#include "nsXULAppAPI.h" +#include "IHistory.h" +#include "ReferrerInfo.h" +#include "base/message_loop.h" +#include "base/process_util.h" +#include "base/task.h" +#include "mozilla/dom/BlobURLProtocolHandler.h" +#include "mozilla/dom/PCycleCollectWithLogsChild.h" +#include "mozilla/dom/PerformanceStorage.h" +#include "nsChromeRegistryContent.h" +#include "nsFrameMessageManager.h" +#include "nsNetUtil.h" +#include "nsWindowMemoryReporter.h" + +#ifdef MOZ_WEBRTC +# include "jsapi/WebrtcGlobalChild.h" +#endif + +#include "PermissionMessageUtils.h" +#include "mozilla/Permission.h" +#include "mozilla/PermissionManager.h" + +#if defined(MOZ_WIDGET_ANDROID) +# include "APKOpen.h" +# include <sched.h> +#endif + +#ifdef XP_WIN +# include <process.h> +# define getpid _getpid +# include "mozilla/WinDllServices.h" +#endif + +#if defined(XP_MACOSX) +# include "nsMacUtilsImpl.h" +# include <sys/qos.h> +#endif /* XP_MACOSX */ + +#ifdef MOZ_X11 +# include "mozilla/X11Util.h" +#endif + +#ifdef ACCESSIBILITY +# include "nsAccessibilityService.h" +# ifdef XP_WIN +# include "mozilla/a11y/AccessibleWrap.h" +# endif +# include "mozilla/a11y/DocAccessible.h" +# include "mozilla/a11y/DocManager.h" +# include "mozilla/a11y/OuterDocAccessible.h" +#endif + +#include "mozilla/dom/File.h" +#include "mozilla/dom/MediaControllerBinding.h" + +#ifdef MOZ_WEBSPEECH +# include "mozilla/dom/PSpeechSynthesisChild.h" +#endif + +#include "ClearOnShutdown.h" +#include "DomainPolicy.h" +#include "GfxInfoBase.h" +#include "MMPrinter.h" +#include "mozilla/ipc/ProcessUtils.h" +#include "mozilla/ipc/URIUtils.h" +#include "VRManagerChild.h" +#include "gfxPlatform.h" +#include "gfxPlatformFontList.h" +#include "mozilla/RemoteSpellCheckEngineChild.h" +#include "mozilla/dom/TabContext.h" +#include "mozilla/dom/ipc/StructuredCloneData.h" +#include "mozilla/ipc/CrashReporterClient.h" +#include "mozilla/net/NeckoMessageUtils.h" +#include "mozilla/widget/PuppetBidiKeyboard.h" +#include "nsContentUtils.h" +#include "nsIPrincipal.h" +#include "nsString.h" +#include "nscore.h" // for NS_FREE_PERMANENT_DATA +#include "private/pprio.h" + +#ifdef MOZ_WIDGET_GTK +# include "mozilla/WidgetUtilsGtk.h" +# include "nsAppRunner.h" +# include <gtk/gtk.h> +#endif + +#ifdef MOZ_CODE_COVERAGE +# include "mozilla/CodeCoverageHandler.h" +#endif + +extern mozilla::LazyLogModule gSHIPBFCacheLog; + +using namespace mozilla; +using namespace mozilla::dom::ipc; +using namespace mozilla::media; +using namespace mozilla::embedding; +using namespace mozilla::gmp; +using namespace mozilla::hal_sandbox; +using namespace mozilla::ipc; +using namespace mozilla::intl; +using namespace mozilla::layers; +using namespace mozilla::layout; +using namespace mozilla::net; +using namespace mozilla::widget; +using mozilla::loader::PScriptCacheChild; + +namespace geckoprofiler::markers { +struct ProcessPriorityChange { + static constexpr Span<const char> MarkerTypeName() { + return MakeStringSpan("ProcessPriorityChange"); + } + static void StreamJSONMarkerData(baseprofiler::SpliceableJSONWriter& aWriter, + const ProfilerString8View& aPreviousPriority, + const ProfilerString8View& aNewPriority) { + aWriter.StringProperty("Before", aPreviousPriority); + aWriter.StringProperty("After", aNewPriority); + } + static MarkerSchema MarkerTypeDisplay() { + using MS = MarkerSchema; + MS schema{MS::Location::MarkerChart, MS::Location::MarkerTable}; + schema.AddKeyFormat("Before", MS::Format::String); + schema.AddKeyFormat("After", MS::Format::String); + schema.AddStaticLabelValue("Note", + "This is a notification of the priority change " + "that was done by the parent process"); + schema.SetAllLabels( + "priority: {marker.data.Before} -> {marker.data.After}"); + return schema; + } +}; + +struct ProcessPriority { + static constexpr Span<const char> MarkerTypeName() { + return MakeStringSpan("ProcessPriority"); + } + static void StreamJSONMarkerData(baseprofiler::SpliceableJSONWriter& aWriter, + const ProfilerString8View& aPriority, + const ProfilingState& aProfilingState) { + aWriter.StringProperty("Priority", aPriority); + aWriter.StringProperty("Marker cause", + ProfilerString8View::WrapNullTerminatedString( + ProfilingStateToString(aProfilingState))); + } + static MarkerSchema MarkerTypeDisplay() { + using MS = MarkerSchema; + MS schema{MS::Location::MarkerChart, MS::Location::MarkerTable}; + schema.AddKeyFormat("Priority", MS::Format::String); + schema.AddKeyFormat("Marker cause", MS::Format::String); + schema.SetAllLabels("priority: {marker.data.Priority}"); + return schema; + } +}; +} // namespace geckoprofiler::markers + +namespace mozilla { +namespace dom { + +// IPC sender for remote GC/CC logging. +class CycleCollectWithLogsChild final : public PCycleCollectWithLogsChild { + public: + NS_INLINE_DECL_REFCOUNTING(CycleCollectWithLogsChild) + + class Sink final : public nsICycleCollectorLogSink { + NS_DECL_ISUPPORTS + + Sink(CycleCollectWithLogsChild* aActor, const FileDescriptor& aGCLog, + const FileDescriptor& aCCLog) { + mActor = aActor; + mGCLog = FileDescriptorToFILE(aGCLog, "w"); + mCCLog = FileDescriptorToFILE(aCCLog, "w"); + } + + NS_IMETHOD Open(FILE** aGCLog, FILE** aCCLog) override { + if (NS_WARN_IF(!mGCLog) || NS_WARN_IF(!mCCLog)) { + return NS_ERROR_FAILURE; + } + *aGCLog = mGCLog; + *aCCLog = mCCLog; + return NS_OK; + } + + NS_IMETHOD CloseGCLog() override { + MOZ_ASSERT(mGCLog); + fclose(mGCLog); + mGCLog = nullptr; + mActor->SendCloseGCLog(); + return NS_OK; + } + + NS_IMETHOD CloseCCLog() override { + MOZ_ASSERT(mCCLog); + fclose(mCCLog); + mCCLog = nullptr; + mActor->SendCloseCCLog(); + return NS_OK; + } + + NS_IMETHOD GetFilenameIdentifier(nsAString& aIdentifier) override { + return UnimplementedProperty(); + } + + NS_IMETHOD SetFilenameIdentifier(const nsAString& aIdentifier) override { + return UnimplementedProperty(); + } + + NS_IMETHOD GetProcessIdentifier(int32_t* aIdentifier) override { + return UnimplementedProperty(); + } + + NS_IMETHOD SetProcessIdentifier(int32_t aIdentifier) override { + return UnimplementedProperty(); + } + + NS_IMETHOD GetGcLog(nsIFile** aPath) override { + return UnimplementedProperty(); + } + + NS_IMETHOD GetCcLog(nsIFile** aPath) override { + return UnimplementedProperty(); + } + + private: + ~Sink() { + if (mGCLog) { + fclose(mGCLog); + mGCLog = nullptr; + } + if (mCCLog) { + fclose(mCCLog); + mCCLog = nullptr; + } + // The XPCOM refcount drives the IPC lifecycle; + Unused << mActor->Send__delete__(mActor); + } + + nsresult UnimplementedProperty() { + MOZ_ASSERT(false, + "This object is a remote GC/CC logger;" + " this property isn't meaningful."); + return NS_ERROR_UNEXPECTED; + } + + RefPtr<CycleCollectWithLogsChild> mActor; + FILE* mGCLog; + FILE* mCCLog; + }; + + private: + ~CycleCollectWithLogsChild() = default; +}; + +NS_IMPL_ISUPPORTS(CycleCollectWithLogsChild::Sink, nsICycleCollectorLogSink); + +class AlertObserver { + public: + AlertObserver(nsIObserver* aObserver, const nsString& aData) + : mObserver(aObserver), mData(aData) {} + + ~AlertObserver() = default; + + nsCOMPtr<nsIObserver> mObserver; + nsString mData; +}; + +class ConsoleListener final : public nsIConsoleListener { + public: + explicit ConsoleListener(ContentChild* aChild) : mChild(aChild) {} + + NS_DECL_ISUPPORTS + NS_DECL_NSICONSOLELISTENER + + private: + ~ConsoleListener() = default; + + ContentChild* mChild; + friend class ContentChild; +}; + +NS_IMPL_ISUPPORTS(ConsoleListener, nsIConsoleListener) + +// Before we send the error to the parent process (which +// involves copying the memory), truncate any long lines. CSS +// errors in particular share the memory for long lines with +// repeated errors, but the IPC communication we're about to do +// will break that sharing, so we better truncate now. +static void TruncateString(nsAString& aString) { + if (aString.Length() > 1000) { + aString.Truncate(1000); + } +} + +NS_IMETHODIMP +ConsoleListener::Observe(nsIConsoleMessage* aMessage) { + if (!mChild) { + return NS_OK; + } + + nsCOMPtr<nsIScriptError> scriptError = do_QueryInterface(aMessage); + if (scriptError) { + nsAutoString msg, sourceName, sourceLine; + nsCString category; + uint32_t lineNum, colNum, flags; + bool fromPrivateWindow, fromChromeContext; + + nsresult rv = scriptError->GetErrorMessage(msg); + NS_ENSURE_SUCCESS(rv, rv); + TruncateString(msg); + rv = scriptError->GetSourceName(sourceName); + NS_ENSURE_SUCCESS(rv, rv); + TruncateString(sourceName); + rv = scriptError->GetSourceLine(sourceLine); + NS_ENSURE_SUCCESS(rv, rv); + TruncateString(sourceLine); + + rv = scriptError->GetCategory(getter_Copies(category)); + NS_ENSURE_SUCCESS(rv, rv); + rv = scriptError->GetLineNumber(&lineNum); + NS_ENSURE_SUCCESS(rv, rv); + rv = scriptError->GetColumnNumber(&colNum); + NS_ENSURE_SUCCESS(rv, rv); + rv = scriptError->GetFlags(&flags); + NS_ENSURE_SUCCESS(rv, rv); + rv = scriptError->GetIsFromPrivateWindow(&fromPrivateWindow); + NS_ENSURE_SUCCESS(rv, rv); + rv = scriptError->GetIsFromChromeContext(&fromChromeContext); + NS_ENSURE_SUCCESS(rv, rv); + + { + AutoJSAPI jsapi; + jsapi.Init(); + JSContext* cx = jsapi.cx(); + + JS::Rooted<JS::Value> stack(cx); + rv = scriptError->GetStack(&stack); + NS_ENSURE_SUCCESS(rv, rv); + + if (stack.isObject()) { + // Because |stack| might be a cross-compartment wrapper, we can't use it + // with JSAutoRealm. Use the stackGlobal for that. + JS::Rooted<JS::Value> stackGlobal(cx); + rv = scriptError->GetStackGlobal(&stackGlobal); + NS_ENSURE_SUCCESS(rv, rv); + + JSAutoRealm ar(cx, &stackGlobal.toObject()); + + StructuredCloneData data; + ErrorResult err; + data.Write(cx, stack, err); + if (err.Failed()) { + return err.StealNSResult(); + } + + ClonedMessageData cloned; + if (!data.BuildClonedMessageData(cloned)) { + return NS_ERROR_FAILURE; + } + + mChild->SendScriptErrorWithStack( + msg, sourceName, sourceLine, lineNum, colNum, flags, category, + fromPrivateWindow, fromChromeContext, cloned); + return NS_OK; + } + } + + mChild->SendScriptError(msg, sourceName, sourceLine, lineNum, colNum, flags, + category, fromPrivateWindow, 0, fromChromeContext); + return NS_OK; + } + + nsString msg; + nsresult rv = aMessage->GetMessageMoz(msg); + NS_ENSURE_SUCCESS(rv, rv); + mChild->SendConsoleMessage(msg); + return NS_OK; +} + +#ifdef NIGHTLY_BUILD +/** + * The singleton of this class is registered with the BackgroundHangMonitor as + * an annotator, so that the hang monitor can record whether or not there were + * pending input events when the thread hung. + */ +class PendingInputEventHangAnnotator final : public BackgroundHangAnnotator { + public: + virtual void AnnotateHang(BackgroundHangAnnotations& aAnnotations) override { + int32_t pending = ContentChild::GetSingleton()->GetPendingInputEvents(); + if (pending > 0) { + aAnnotations.AddAnnotation(u"PendingInput"_ns, pending); + } + } + + static PendingInputEventHangAnnotator sSingleton; +}; +PendingInputEventHangAnnotator PendingInputEventHangAnnotator::sSingleton; +#endif + +class ContentChild::ShutdownCanary final {}; + +ContentChild* ContentChild::sSingleton; +StaticAutoPtr<ContentChild::ShutdownCanary> ContentChild::sShutdownCanary; + +ContentChild::ContentChild() + : mID(uint64_t(-1)), + mIsForBrowser(false), + mIsAlive(true), + mShuttingDown(false) { + // This process is a content process, so it's clearly running in + // multiprocess mode! + nsDebugImpl::SetMultiprocessMode("Child"); + + // Our static analysis doesn't allow capturing ref-counted pointers in + // lambdas, so we need to hide it in a uintptr_t. This is safe because this + // lambda will be destroyed in ~ContentChild(). + uintptr_t self = reinterpret_cast<uintptr_t>(this); + profiler_add_state_change_callback( + AllProfilingStates(), + [self](ProfilingState aProfilingState) { + const ContentChild* selfPtr = + reinterpret_cast<const ContentChild*>(self); + PROFILER_MARKER("Process Priority", OTHER, + mozilla::MarkerThreadId::MainThread(), ProcessPriority, + ProfilerString8View::WrapNullTerminatedString( + ProcessPriorityToString(selfPtr->mProcessPriority)), + aProfilingState); + }, + self); + + // When ContentChild is created, the observer service does not even exist. + // When ContentChild::RecvSetXPCOMProcessAttributes is called (the first + // IPDL call made on this object), shutdown may have already happened. Thus + // we create a canary here that relies upon getting cleared if shutdown + // happens without requiring the observer service at this time. + if (!sShutdownCanary) { + sShutdownCanary = new ShutdownCanary(); + ClearOnShutdown(&sShutdownCanary, ShutdownPhase::XPCOMShutdown); + } +} + +#ifdef _MSC_VER +# pragma warning(push) +# pragma warning( \ + disable : 4722) /* Silence "destructor never returns" warning \ + */ +#endif + +ContentChild::~ContentChild() { + profiler_remove_state_change_callback(reinterpret_cast<uintptr_t>(this)); + +#ifndef NS_FREE_PERMANENT_DATA + MOZ_CRASH("Content Child shouldn't be destroyed."); +#endif +} + +#ifdef _MSC_VER +# pragma warning(pop) +#endif + +NS_INTERFACE_MAP_BEGIN(ContentChild) + NS_INTERFACE_MAP_ENTRY(nsIDOMProcessChild) + NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMProcessChild) +NS_INTERFACE_MAP_END + +mozilla::ipc::IPCResult ContentChild::RecvSetXPCOMProcessAttributes( + XPCOMInitData&& aXPCOMInit, const StructuredCloneData& aInitialData, + FullLookAndFeel&& aLookAndFeelData, dom::SystemFontList&& aFontList, + Maybe<SharedMemoryHandle>&& aSharedUASheetHandle, + const uintptr_t& aSharedUASheetAddress, + nsTArray<SharedMemoryHandle>&& aSharedFontListBlocks, + const bool& aIsReadyForBackgroundProcessing) { + if (!sShutdownCanary) { + return IPC_OK(); + } + + mLookAndFeelData = std::move(aLookAndFeelData); + mFontList = std::move(aFontList); + mSharedFontListBlocks = std::move(aSharedFontListBlocks); + + gfx::gfxVars::SetValuesForInitialize(aXPCOMInit.gfxNonDefaultVarUpdates()); + PerfStats::SetCollectionMask(aXPCOMInit.perfStatsMask()); + InitSharedUASheets(std::move(aSharedUASheetHandle), aSharedUASheetAddress); + InitXPCOM(std::move(aXPCOMInit), aInitialData, + aIsReadyForBackgroundProcessing); + InitGraphicsDeviceData(aXPCOMInit.contentDeviceData()); + RefPtr<net::ChildDNSService> dnsServiceChild = + dont_AddRef(net::ChildDNSService::GetSingleton()); + if (dnsServiceChild) { + dnsServiceChild->SetTRRDomain(aXPCOMInit.trrDomain()); + dnsServiceChild->SetTRRModeInChild(aXPCOMInit.trrMode(), + aXPCOMInit.trrModeFromPref()); + } + return IPC_OK(); +} + +class nsGtkNativeInitRunnable : public Runnable { + public: + nsGtkNativeInitRunnable() : Runnable("nsGtkNativeInitRunnable") {} + + NS_IMETHOD Run() override { + LookAndFeel::NativeInit(); + return NS_OK; + } +}; + +void ContentChild::Init(mozilla::ipc::UntypedEndpoint&& aEndpoint, + const char* aParentBuildID, uint64_t aChildID, + bool aIsForBrowser) { +#ifdef MOZ_WIDGET_GTK + // When running X11 only build we need to pass a display down + // to gtk_init because it's not going to use the one from the environment + // on its own when deciding which backend to use, and when starting under + // XWayland, it may choose to start with the wayland backend + // instead of the x11 backend. + // The DISPLAY environment variable is normally set by the parent process. + // The MOZ_GDK_DISPLAY environment variable is set from nsAppRunner.cpp + // when --display is set by the command line. + if (!gfxPlatform::IsHeadless()) { + const char* display_name = PR_GetEnv("MOZ_GDK_DISPLAY"); + if (!display_name) { + bool waylandEnabled = false; +# ifdef MOZ_WAYLAND + waylandEnabled = IsWaylandEnabled(); +# endif + if (!waylandEnabled) { + display_name = PR_GetEnv("DISPLAY"); + } + } + if (display_name) { + int argc = 3; + char option_name[] = "--display"; + char* argv[] = { + // argv0 is unused because g_set_prgname() was called in + // XRE_InitChildProcess(). + nullptr, option_name, const_cast<char*>(display_name), nullptr}; + char** argvp = argv; + gtk_init(&argc, &argvp); + } else { + gtk_init(nullptr, nullptr); + } + } +#endif + +#ifdef MOZ_X11 + if (!gfxPlatform::IsHeadless()) { + // Do this after initializing GDK, or GDK will install its own handler. + XRE_InstallX11ErrorHandler(); + } +#endif + + MOZ_ASSERT(!sSingleton, "only one ContentChild per child"); + + // Once we start sending IPC messages, we need the thread manager to be + // initialized so we can deal with the responses. Do that here before we + // try to construct the crash reporter. + nsresult rv = nsThreadManager::get().Init(); + if (NS_WARN_IF(NS_FAILED(rv))) { + MOZ_CRASH("Failed to initialize the thread manager in ContentChild::Init"); + } + + if (!aEndpoint.Bind(this)) { + MOZ_CRASH("Bind failed in ContentChild::Init"); + } + sSingleton = this; + + // If communications with the parent have broken down, take the process + // down so it's not hanging around. + GetIPCChannel()->SetAbortOnError(true); + + // This must be checked before any IPDL message, which may hit sentinel + // errors due to parent and content processes having different + // versions. + MessageChannel* channel = GetIPCChannel(); + if (channel && !channel->SendBuildIDsMatchMessage(aParentBuildID)) { + // We need to quit this process if the buildID doesn't match the parent's. + // This can occur when an update occurred in the background. + ProcessChild::QuickExit(); + } + +#if defined(__OpenBSD__) && defined(MOZ_SANDBOX) + StartOpenBSDSandbox(GeckoProcessType_Content); +#endif + +#ifdef MOZ_X11 +# ifdef MOZ_WIDGET_GTK + if (GdkIsX11Display() && !gfxPlatform::IsHeadless()) { + // Send the parent our X socket to act as a proxy reference for our X + // resources. + int xSocketFd = ConnectionNumber(DefaultXDisplay()); + SendBackUpXResources(FileDescriptor(xSocketFd)); + } +# endif +#endif + + CrashReporterClient::InitSingleton(this); + + mID = aChildID; + mIsForBrowser = aIsForBrowser; + + SetProcessName("Web Content"_ns); + +#ifdef NIGHTLY_BUILD + // NOTE: We have to register the annotator on the main thread, as annotators + // only affect a single thread. + SchedulerGroup::Dispatch( + NS_NewRunnableFunction("RegisterPendingInputEventHangAnnotator", [] { + BackgroundHangMonitor::RegisterAnnotator( + PendingInputEventHangAnnotator::sSingleton); + })); +#endif +} + +void ContentChild::AddProfileToProcessName(const nsACString& aProfile) { + nsCOMPtr<nsIPrincipal> isolationPrincipal = + ContentParent::CreateRemoteTypeIsolationPrincipal(mRemoteType); + if (isolationPrincipal) { + // DEFAULT_PRIVATE_BROWSING_ID is the value when it's not private + if (isolationPrincipal->OriginAttributesRef().mPrivateBrowsingId != + nsIScriptSecurityManager::DEFAULT_PRIVATE_BROWSING_ID) { + return; + } + } + + mProcessName = aProfile + ":"_ns + mProcessName; //<profile_name>:example.com +} + +void ContentChild::SetProcessName(const nsACString& aName, + const nsACString* aSite, + const nsACString* aCurrentProfile) { + char* name; + if ((name = PR_GetEnv("MOZ_DEBUG_APP_PROCESS")) && aName.EqualsASCII(name)) { +#ifdef XP_UNIX + printf_stderr("\n\nCHILDCHILDCHILDCHILD\n [%s] debug me @%d\n\n", name, + getpid()); + sleep(30); +#elif defined(XP_WIN) + // Windows has a decent JIT debugging story, so NS_DebugBreak does the + // right thing. + NS_DebugBreak(NS_DEBUG_BREAK, + "Invoking NS_DebugBreak() to debug child process", nullptr, + __FILE__, __LINE__); +#endif + } + + if (aSite) { + profiler_set_process_name(aName, aSite); + } else { + profiler_set_process_name(aName); + } + + mProcessName = aName; + + // Requires pref flip + if (aSite && StaticPrefs::fission_processSiteNames()) { + nsCOMPtr<nsIPrincipal> isolationPrincipal = + ContentParent::CreateRemoteTypeIsolationPrincipal(mRemoteType); + if (isolationPrincipal) { + // DEFAULT_PRIVATE_BROWSING_ID is the value when it's not private + MOZ_LOG(ContentParent::GetLog(), LogLevel::Debug, + ("private = %d, pref = %d", + isolationPrincipal->OriginAttributesRef().mPrivateBrowsingId != + nsIScriptSecurityManager::DEFAULT_PRIVATE_BROWSING_ID, + StaticPrefs::fission_processPrivateWindowSiteNames())); + if (isolationPrincipal->OriginAttributesRef().mPrivateBrowsingId == + nsIScriptSecurityManager::DEFAULT_PRIVATE_BROWSING_ID +#ifdef NIGHTLY_BUILD + // Nightly can show site names for private windows, with a second pref + || StaticPrefs::fission_processPrivateWindowSiteNames() +#endif + ) { +#if !defined(XP_MACOSX) + // Mac doesn't have the 15-character limit Linux does + // Sets profiler process name + if (isolationPrincipal->SchemeIs("https")) { + nsAutoCString schemeless; + isolationPrincipal->GetHostPort(schemeless); + nsAutoCString originSuffix; + isolationPrincipal->GetOriginSuffix(originSuffix); + schemeless.Append(originSuffix); + mProcessName = schemeless; + } else +#endif + { + mProcessName = *aSite; + } + } + } + } + + if (StaticPrefs::fission_processProfileName() && aCurrentProfile && + !aCurrentProfile->IsEmpty()) { + AddProfileToProcessName(*aCurrentProfile); + } + + // else private window, don't change process name, or the pref isn't set + // mProcessName is always flat (mProcessName == aName) + + mozilla::ipc::SetThisProcessName(mProcessName.get()); + + MOZ_LOG(ContentParent::GetLog(), LogLevel::Debug, + ("Changed name of process %d to %s", getpid(), + PromiseFlatCString(mProcessName).get())); +} + +static nsresult GetCreateWindowParams(nsIOpenWindowInfo* aOpenWindowInfo, + nsDocShellLoadState* aLoadState, + bool aForceNoReferrer, + nsIReferrerInfo** aReferrerInfo, + nsIPrincipal** aTriggeringPrincipal, + nsIContentSecurityPolicy** aCsp) { + if (!aTriggeringPrincipal || !aCsp) { + NS_ERROR("aTriggeringPrincipal || aCsp is null"); + return NS_ERROR_FAILURE; + } + + if (!aReferrerInfo) { + NS_ERROR("aReferrerInfo is null"); + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIReferrerInfo> referrerInfo; + if (aForceNoReferrer) { + referrerInfo = new ReferrerInfo(nullptr, ReferrerPolicy::_empty, false); + } + if (aLoadState && !referrerInfo) { + referrerInfo = aLoadState->GetReferrerInfo(); + } + + RefPtr<BrowsingContext> parent = aOpenWindowInfo->GetParent(); + nsCOMPtr<nsPIDOMWindowOuter> opener = + parent ? parent->GetDOMWindow() : nullptr; + if (!opener) { + nsCOMPtr<nsIPrincipal> nullPrincipal = + NullPrincipal::Create(aOpenWindowInfo->GetOriginAttributes()); + if (!referrerInfo) { + referrerInfo = new ReferrerInfo(nullptr, ReferrerPolicy::_empty); + } + + referrerInfo.swap(*aReferrerInfo); + NS_ADDREF(*aTriggeringPrincipal = nullPrincipal); + return NS_OK; + } + + nsCOMPtr<Document> doc = opener->GetDoc(); + NS_ADDREF(*aTriggeringPrincipal = doc->NodePrincipal()); + + nsCOMPtr<nsIContentSecurityPolicy> csp = doc->GetCsp(); + if (csp) { + csp.forget(aCsp); + } + + nsCOMPtr<nsIURI> baseURI = doc->GetDocBaseURI(); + if (!baseURI) { + NS_ERROR("Document didn't return a base URI"); + return NS_ERROR_FAILURE; + } + + if (!referrerInfo) { + referrerInfo = new ReferrerInfo(*doc); + } + + referrerInfo.swap(*aReferrerInfo); + return NS_OK; +} + +nsresult ContentChild::ProvideWindowCommon( + NotNull<BrowserChild*> aTabOpener, nsIOpenWindowInfo* aOpenWindowInfo, + uint32_t aChromeFlags, bool aCalledFromJS, nsIURI* aURI, + const nsAString& aName, const nsACString& aFeatures, + const UserActivation::Modifiers& aModifiers, bool aForceNoOpener, + bool aForceNoReferrer, bool aIsPopupRequested, + nsDocShellLoadState* aLoadState, bool* aWindowIsNew, + BrowsingContext** aReturn) { + *aReturn = nullptr; + + nsAutoCString features(aFeatures); + nsAutoString name(aName); + + nsresult rv; + + RefPtr<BrowsingContext> parent = aOpenWindowInfo->GetParent(); + MOZ_DIAGNOSTIC_ASSERT(parent, "We must have a parent BC"); + + // Block the attempt to open a new window if the opening BrowsingContext is + // not marked to use remote tabs. This ensures that the newly opened window is + // correctly remote. + if (NS_WARN_IF(!parent->UseRemoteTabs())) { + return NS_ERROR_ABORT; + } + + bool useRemoteSubframes = + aChromeFlags & nsIWebBrowserChrome::CHROME_FISSION_WINDOW; + + uint32_t parentSandboxFlags = parent->SandboxFlags(); + if (Document* doc = parent->GetDocument()) { + parentSandboxFlags = doc->GetSandboxFlags(); + } + + // Certain conditions complicate the process of creating the new + // BrowsingContext, and prevent us from using the + // "CreateWindowInDifferentProcess" codepath. + // * With Fission enabled, process selection will happen during the load, so + // switching processes eagerly will not provide a benefit. + // * Windows created for printing must be created within the current process + // so that a static clone of the source document can be created. + // * Sandboxed popups require the full window creation codepath. + // * Loads with form or POST data require the full window creation codepath. + bool cannotLoadInDifferentProcess = + useRemoteSubframes || aOpenWindowInfo->GetIsForPrinting() || + (parentSandboxFlags & + SANDBOX_PROPAGATES_TO_AUXILIARY_BROWSING_CONTEXTS) || + (aLoadState && + (aLoadState->IsFormSubmission() || aLoadState->PostDataStream())); + if (!cannotLoadInDifferentProcess) { + // If we're in a content process and we have noopener set, there's no reason + // to load in our process, so let's load it elsewhere! + bool loadInDifferentProcess = + aForceNoOpener && StaticPrefs::dom_noopener_newprocess_enabled(); + if (loadInDifferentProcess) { + nsCOMPtr<nsIPrincipal> triggeringPrincipal; + nsCOMPtr<nsIContentSecurityPolicy> csp; + nsCOMPtr<nsIReferrerInfo> referrerInfo; + rv = GetCreateWindowParams(aOpenWindowInfo, aLoadState, aForceNoReferrer, + getter_AddRefs(referrerInfo), + getter_AddRefs(triggeringPrincipal), + getter_AddRefs(csp)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + if (name.LowerCaseEqualsLiteral("_blank")) { + name.Truncate(); + } + + MOZ_DIAGNOSTIC_ASSERT(!nsContentUtils::IsSpecialName(name)); + + Unused << SendCreateWindowInDifferentProcess( + aTabOpener, parent, aChromeFlags, aCalledFromJS, aURI, features, + aModifiers, name, triggeringPrincipal, csp, referrerInfo, + aOpenWindowInfo->GetOriginAttributes()); + + // We return NS_ERROR_ABORT, so that the caller knows that we've abandoned + // the window open as far as it is concerned. + return NS_ERROR_ABORT; + } + } + + TabId tabId(nsContentUtils::GenerateTabId()); + + // We need to assign a TabGroup to the PBrowser actor before we send it to the + // parent. Otherwise, the parent could send messages to us before we have a + // proper TabGroup for that actor. + RefPtr<BrowsingContext> openerBC; + if (!aForceNoOpener) { + openerBC = parent; + } + + RefPtr<BrowsingContext> browsingContext = BrowsingContext::CreateDetached( + nullptr, openerBC, nullptr, aName, BrowsingContext::Type::Content, + aIsPopupRequested); + MOZ_ALWAYS_SUCCEEDS(browsingContext->SetRemoteTabs(true)); + MOZ_ALWAYS_SUCCEEDS(browsingContext->SetRemoteSubframes(useRemoteSubframes)); + MOZ_ALWAYS_SUCCEEDS(browsingContext->SetOriginAttributes( + aOpenWindowInfo->GetOriginAttributes())); + + browsingContext->InitPendingInitialization(true); + auto unsetPending = MakeScopeExit([browsingContext]() { + Unused << browsingContext->SetPendingInitialization(false); + }); + + browsingContext->EnsureAttached(); + + // The initial about:blank document we generate within the nsDocShell will + // almost certainly be replaced at some point. Unfortunately, getting the + // principal right here causes bugs due to frame scripts not getting events + // they expect, due to the real initial about:blank not being created yet. + // + // For this reason, we intentionally mispredict the initial principal here, so + // that we can act the same as we did before when not predicting a result + // principal. This `PWindowGlobal` will almost immediately be destroyed. + nsCOMPtr<nsIPrincipal> initialPrincipal = + NullPrincipal::Create(browsingContext->OriginAttributesRef()); + WindowGlobalInit windowInit = WindowGlobalActor::AboutBlankInitializer( + browsingContext, initialPrincipal); + + RefPtr<WindowGlobalChild> windowChild = + WindowGlobalChild::CreateDisconnected(windowInit); + if (NS_WARN_IF(!windowChild)) { + return NS_ERROR_ABORT; + } + + auto newChild = MakeNotNull<RefPtr<BrowserChild>>( + this, tabId, *aTabOpener, browsingContext, aChromeFlags, + /* aIsTopLevel */ true); + + if (IsShuttingDown()) { + return NS_ERROR_ABORT; + } + + // Open a remote endpoint for our PBrowser actor. + ManagedEndpoint<PBrowserParent> parentEp = OpenPBrowserEndpoint(newChild); + if (NS_WARN_IF(!parentEp.IsValid())) { + return NS_ERROR_ABORT; + } + + // Open a remote endpoint for our PWindowGlobal actor. + ManagedEndpoint<PWindowGlobalParent> windowParentEp = + newChild->OpenPWindowGlobalEndpoint(windowChild); + if (NS_WARN_IF(!windowParentEp.IsValid())) { + return NS_ERROR_ABORT; + } + + // Tell the parent process to set up its PBrowserParent. + PopupIPCTabContext ipcContext(aTabOpener, 0); + if (NS_WARN_IF(!SendConstructPopupBrowser( + std::move(parentEp), std::move(windowParentEp), tabId, ipcContext, + windowInit, aChromeFlags))) { + return NS_ERROR_ABORT; + } + + windowChild->Init(); + auto guardNullWindowGlobal = MakeScopeExit([&] { + if (!windowChild->GetWindowGlobal()) { + windowChild->Destroy(); + } + }); + + // Now that |newChild| has had its IPC link established, call |Init| to set it + // up. + // XXX: This MOZ_KnownLive is only necessary because the static analysis can't + // tell that NotNull<RefPtr<BrowserChild>> is a strong pointer. + RefPtr<nsPIDOMWindowOuter> parentWindow = + parent ? parent->GetDOMWindow() : nullptr; + if (NS_FAILED(MOZ_KnownLive(newChild)->Init(parentWindow, windowChild))) { + return NS_ERROR_ABORT; + } + + // Set to true when we're ready to return from this function. + bool ready = false; + + // NOTE: Capturing by reference here is safe, as this function won't return + // until one of these callbacks is called. + auto resolve = [&](CreatedWindowInfo&& info) { + MOZ_RELEASE_ASSERT(NS_IsMainThread()); + rv = info.rv(); + *aWindowIsNew = info.windowOpened(); + nsTArray<FrameScriptInfo> frameScripts(std::move(info.frameScripts())); + uint32_t maxTouchPoints = info.maxTouchPoints(); + DimensionInfo dimensionInfo = std::move(info.dimensions()); + + // Once this function exits, we should try to exit the nested event loop. + ready = true; + + // NOTE: We have to handle this immediately in the resolve callback in order + // to make sure that we don't process any more IPC messages before returning + // from ProvideWindowCommon. + + // Handle the error which we got back from the parent process, if we got + // one. + if (NS_FAILED(rv)) { + return; + } + + if (!*aWindowIsNew) { + rv = NS_ERROR_ABORT; + return; + } + + // If the BrowserChild has been torn down, we don't need to do this anymore. + if (NS_WARN_IF(!newChild->IPCOpen() || newChild->IsDestroyed())) { + rv = NS_ERROR_ABORT; + return; + } + + ParentShowInfo showInfo(u""_ns, /* fakeShowInfo = */ true, + /* isTransparent = */ false, + newChild->WebWidget()->GetDPI(), + newChild->WebWidget()->RoundsWidgetCoordinatesTo(), + newChild->WebWidget()->GetDefaultScale().scale); + + newChild->SetMaxTouchPoints(maxTouchPoints); + + if (aForceNoOpener || !parent) { + MOZ_DIAGNOSTIC_ASSERT(!browsingContext->HadOriginalOpener()); + MOZ_DIAGNOSTIC_ASSERT(browsingContext->GetOpenerId() == 0); + } else { + MOZ_DIAGNOSTIC_ASSERT(browsingContext->HadOriginalOpener()); + MOZ_DIAGNOSTIC_ASSERT(browsingContext->GetOpenerId() == parent->Id()); + } + + // Unfortunately we don't get a window unless we've shown the frame. That's + // pretty bogus; see bug 763602. + newChild->DoFakeShow(showInfo); + + newChild->RecvUpdateDimensions(dimensionInfo); + + for (size_t i = 0; i < frameScripts.Length(); i++) { + FrameScriptInfo& info = frameScripts[i]; + if (!newChild->RecvLoadRemoteScript(info.url(), + info.runInGlobalScope())) { + MOZ_CRASH(); + } + } + + if (xpc::IsInAutomation()) { + if (nsCOMPtr<nsPIDOMWindowOuter> outer = + do_GetInterface(newChild->WebNavigation())) { + nsCOMPtr<nsIObserverService> obs(services::GetObserverService()); + obs->NotifyObservers( + outer, "dangerous:test-only:new-browser-child-ready", nullptr); + } + } + + browsingContext.forget(aReturn); + }; + + // NOTE: Capturing by reference here is safe, as this function won't return + // until one of these callbacks is called. + auto reject = [&](ResponseRejectReason) { + MOZ_RELEASE_ASSERT(NS_IsMainThread()); + NS_WARNING("windowCreated promise rejected"); + rv = NS_ERROR_NOT_AVAILABLE; + ready = true; + }; + + // Send down the request to open the window. + nsCOMPtr<nsIPrincipal> triggeringPrincipal; + nsCOMPtr<nsIContentSecurityPolicy> csp; + nsCOMPtr<nsIReferrerInfo> referrerInfo; + rv = GetCreateWindowParams(aOpenWindowInfo, aLoadState, aForceNoReferrer, + getter_AddRefs(referrerInfo), + getter_AddRefs(triggeringPrincipal), + getter_AddRefs(csp)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + SendCreateWindow(aTabOpener, parent, newChild, aChromeFlags, aCalledFromJS, + aOpenWindowInfo->GetIsForPrinting(), + aOpenWindowInfo->GetIsForWindowDotPrint(), aURI, features, + aModifiers, triggeringPrincipal, csp, referrerInfo, + aOpenWindowInfo->GetOriginAttributes(), std::move(resolve), + std::move(reject)); + + // ======================= + // Begin Nested Event Loop + // ======================= + + // We have to wait for a response from SendCreateWindow or with information + // we're going to need to return from this function, So we spin a nested event + // loop until they get back to us. + + { + // Suppress event handling for all contexts in our BrowsingContextGroup so + // that event handlers cannot target our new window while it's still being + // opened. Note that pending events that were suppressed while our blocker + // was active will be dispatched asynchronously from a runnable dispatched + // to the main event loop after this function returns, not immediately when + // we leave this scope. + AutoSuppressEventHandlingAndSuspend seh(browsingContext->Group()); + + AutoNoJSAPI nojsapi; + + // Spin the event loop until we get a response. Callers of this function + // already have to guard against an inner event loop spinning in the + // non-e10s case because of the need to spin one to create a new chrome + // window. + SpinEventLoopUntil("ContentChild::ProvideWindowCommon"_ns, + [&]() { return ready; }); + MOZ_RELEASE_ASSERT(ready, + "We are on the main thread, so we should not exit this " + "loop without ready being true."); + } + + // ===================== + // End Nested Event Loop + // ===================== + + // It's possible for our new BrowsingContext to become discarded during the + // nested event loop, in which case we shouldn't return it, since our callers + // will generally not be prepared to deal with that. + if (*aReturn && (*aReturn)->IsDiscarded()) { + NS_RELEASE(*aReturn); + return NS_ERROR_ABORT; + } + + // We should have the results already set by the callbacks. + MOZ_ASSERT_IF(NS_SUCCEEDED(rv), *aReturn); + return rv; +} + +bool ContentChild::IsAlive() const { return mIsAlive; } + +bool ContentChild::IsShuttingDown() const { return mShuttingDown; } + +void ContentChild::GetProcessName(nsACString& aName) const { + aName = mProcessName; +} + +/* static */ +void ContentChild::AppendProcessId(nsACString& aName) { + if (!aName.IsEmpty()) { + aName.Append(' '); + } + unsigned pid = getpid(); + aName.Append(nsPrintfCString("(pid %u)", pid)); +} + +void ContentChild::InitGraphicsDeviceData(const ContentDeviceData& aData) { + gfxPlatform::InitChild(aData); +} + +void ContentChild::InitSharedUASheets(Maybe<SharedMemoryHandle>&& aHandle, + uintptr_t aAddress) { + MOZ_ASSERT_IF(!aHandle, !aAddress); + + if (!aAddress) { + return; + } + + // Map the shared memory storing the user agent style sheets. Do this as + // early as possible to maximize the chance of being able to map at the + // address we want. + GlobalStyleSheetCache::SetSharedMemory(std::move(*aHandle), aAddress); +} + +void ContentChild::InitXPCOM( + XPCOMInitData&& aXPCOMInit, + const mozilla::dom::ipc::StructuredCloneData& aInitialData, + bool aIsReadyForBackgroundProcessing) { +#ifdef MOZ_WIDGET_GTK + // LookAndFeel::NativeInit takes a long time to run on Linux, here we schedule + // it as soon as possible after BackgroundChild::Startup to give + // it chance to run ahead of ConstructBrowser + nsCOMPtr<nsIRunnable> event = new nsGtkNativeInitRunnable(); + NS_DispatchToMainThreadQueue(event.forget(), EventQueuePriority::Idle); +#endif + +#if defined(XP_WIN) + // DLL services untrusted modules processing depends on + // BackgroundChild::Startup having been called + RefPtr<DllServices> dllSvc(DllServices::Get()); + dllSvc->StartUntrustedModulesProcessor(aIsReadyForBackgroundProcessing); +#endif // defined(XP_WIN) + + PBackgroundChild* actorChild = BackgroundChild::GetOrCreateForCurrentThread(); + if (NS_WARN_IF(!actorChild)) { + MOZ_ASSERT_UNREACHABLE("PBackground init can't fail at this point"); + return; + } + + ClientManager::Startup(); + + // RemoteWorkerService will be initialized in RecvRemoteType, to avoid to + // register it to the RemoteWorkerManager while it is still a prealloc + // remoteType and defer it to the point the child process is assigned a. + // actual remoteType. + + nsCOMPtr<nsIConsoleService> svc(do_GetService(NS_CONSOLESERVICE_CONTRACTID)); + if (!svc) { + NS_WARNING("Couldn't acquire console service"); + return; + } + + mConsoleListener = new ConsoleListener(this); + if (NS_FAILED(svc->RegisterListener(mConsoleListener))) + NS_WARNING("Couldn't register console listener for child process"); + + mAvailableDictionaries = std::move(aXPCOMInit.dictionaries()); + + RecvSetOffline(aXPCOMInit.isOffline()); + RecvSetConnectivity(aXPCOMInit.isConnected()); + + LocaleService::GetInstance()->AssignAppLocales(aXPCOMInit.appLocales()); + LocaleService::GetInstance()->AssignRequestedLocales( + aXPCOMInit.requestedLocales()); + + L10nRegistry::RegisterFileSourcesFromParentProcess( + aXPCOMInit.l10nFileSources()); + + RecvSetCaptivePortalState(aXPCOMInit.captivePortalState()); + RecvBidiKeyboardNotify(aXPCOMInit.isLangRTL(), + aXPCOMInit.haveBidiKeyboards()); + + if (aXPCOMInit.domainPolicy().active()) { + nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager(); + MOZ_ASSERT(ssm); + ssm->ActivateDomainPolicyInternal(getter_AddRefs(mPolicy)); + if (!mPolicy) { + MOZ_CRASH("Failed to activate domain policy."); + } + mPolicy->ApplyClone(&aXPCOMInit.domainPolicy()); + } + + nsCOMPtr<nsIClipboard> clipboard( + do_GetService("@mozilla.org/widget/clipboard;1")); + if (nsCOMPtr<nsIClipboardProxy> clipboardProxy = + do_QueryInterface(clipboard)) { + clipboardProxy->SetCapabilities(aXPCOMInit.clipboardCaps()); + } + + { + AutoJSAPI jsapi; + if (NS_WARN_IF(!jsapi.Init(xpc::PrivilegedJunkScope()))) { + MOZ_CRASH(); + } + ErrorResult rv; + JS::Rooted<JS::Value> data(jsapi.cx()); + mozilla::dom::ipc::StructuredCloneData id; + id.Copy(aInitialData); + id.Read(jsapi.cx(), &data, rv); + if (NS_WARN_IF(rv.Failed())) { + MOZ_CRASH(); + } + auto* global = ContentProcessMessageManager::Get(); + global->SetInitialProcessData(data); + } + + // The stylesheet cache is not ready yet. Store this URL for future use. + nsCOMPtr<nsIURI> ucsURL = std::move(aXPCOMInit.userContentSheetURL()); + GlobalStyleSheetCache::SetUserContentCSSURL(ucsURL); + + GfxInfoBase::SetFeatureStatus(std::move(aXPCOMInit.gfxFeatureStatus())); + + // Initialize the RemoteDecoderManager thread and its associated PBackground + // channel. + RemoteDecoderManagerChild::Init(); + + Preferences::RegisterCallbackAndCall(&OnFissionBlocklistPrefChange, + kFissionEnforceBlockList); + Preferences::RegisterCallbackAndCall(&OnFissionBlocklistPrefChange, + kFissionOmitBlockListValues); + + // Set the dynamic scalar definitions for this process. + TelemetryIPC::AddDynamicScalarDefinitions(aXPCOMInit.dynamicScalarDefs()); +} + +mozilla::ipc::IPCResult ContentChild::RecvRequestMemoryReport( + const uint32_t& aGeneration, const bool& aAnonymize, + const bool& aMinimizeMemoryUsage, + const Maybe<mozilla::ipc::FileDescriptor>& aDMDFile, + const RequestMemoryReportResolver& aResolver) { + nsCString process; + if (aAnonymize || mRemoteType.IsEmpty()) { + GetProcessName(process); + } else { + process = mRemoteType; + } + AppendProcessId(process); + MOZ_ASSERT(!process.IsEmpty()); + + MemoryReportRequestClient::Start( + aGeneration, aAnonymize, aMinimizeMemoryUsage, aDMDFile, process, + [&](const MemoryReport& aReport) { + Unused << GetSingleton()->SendAddMemoryReport(aReport); + }, + aResolver); + return IPC_OK(); +} + +#if defined(XP_WIN) +mozilla::ipc::IPCResult ContentChild::RecvGetUntrustedModulesData( + GetUntrustedModulesDataResolver&& aResolver) { + RefPtr<DllServices> dllSvc(DllServices::Get()); + dllSvc->GetUntrustedModulesData()->Then( + GetMainThreadSerialEventTarget(), __func__, + [aResolver](Maybe<UntrustedModulesData>&& aData) { + aResolver(std::move(aData)); + }, + [aResolver](nsresult aReason) { aResolver(Nothing()); }); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUnblockUntrustedModulesThread() { + if (nsCOMPtr<nsIObserverService> obs = + mozilla::services::GetObserverService()) { + obs->NotifyObservers(nullptr, "unblock-untrusted-modules-thread", nullptr); + } + return IPC_OK(); +} +#endif // defined(XP_WIN) + +PCycleCollectWithLogsChild* ContentChild::AllocPCycleCollectWithLogsChild( + const bool& aDumpAllTraces, const FileDescriptor& aGCLog, + const FileDescriptor& aCCLog) { + return do_AddRef(new CycleCollectWithLogsChild()).take(); +} + +mozilla::ipc::IPCResult ContentChild::RecvPCycleCollectWithLogsConstructor( + PCycleCollectWithLogsChild* aActor, const bool& aDumpAllTraces, + const FileDescriptor& aGCLog, const FileDescriptor& aCCLog) { + // The sink's destructor is called when the last reference goes away, which + // will cause the actor to be closed down. + auto* actor = static_cast<CycleCollectWithLogsChild*>(aActor); + RefPtr<CycleCollectWithLogsChild::Sink> sink = + new CycleCollectWithLogsChild::Sink(actor, aGCLog, aCCLog); + + // Invoke the dumper, which will take a reference to the sink. + nsCOMPtr<nsIMemoryInfoDumper> dumper = + do_GetService("@mozilla.org/memory-info-dumper;1"); + dumper->DumpGCAndCCLogsToSink(aDumpAllTraces, sink); + return IPC_OK(); +} + +bool ContentChild::DeallocPCycleCollectWithLogsChild( + PCycleCollectWithLogsChild* aActor) { + RefPtr<CycleCollectWithLogsChild> actor = + dont_AddRef(static_cast<CycleCollectWithLogsChild*>(aActor)); + return true; +} + +mozilla::ipc::IPCResult ContentChild::RecvInitGMPService( + Endpoint<PGMPServiceChild>&& aGMPService) { + if (!GMPServiceChild::Create(std::move(aGMPService))) { + return IPC_FAIL_NO_REASON(this); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvInitProfiler( + Endpoint<PProfilerChild>&& aEndpoint) { + mProfilerController = ChildProfilerController::Create(std::move(aEndpoint)); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvGMPsChanged( + nsTArray<GMPCapabilityData>&& capabilities) { + GeckoMediaPluginServiceChild::UpdateGMPCapabilities(std::move(capabilities)); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvInitProcessHangMonitor( + Endpoint<PProcessHangMonitorChild>&& aHangMonitor) { + CreateHangMonitorChild(std::move(aHangMonitor)); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::GetResultForRenderingInitFailure( + base::ProcessId aOtherPid) { + if (aOtherPid == base::GetCurrentProcId() || aOtherPid == OtherPid()) { + // If we are talking to ourselves, or the UI process, then that is a fatal + // protocol error. + return IPC_FAIL_NO_REASON(this); + } + + // If we are talking to the GPU process, then we should recover from this on + // the next ContentChild::RecvReinitRendering call. + gfxCriticalNote << "Could not initialize rendering with GPU process"; + return IPC_OK(); +} + +#if defined(XP_MACOSX) +extern "C" { +void CGSShutdownServerConnections(); +}; +#endif + +mozilla::ipc::IPCResult ContentChild::RecvInitRendering( + Endpoint<PCompositorManagerChild>&& aCompositor, + Endpoint<PImageBridgeChild>&& aImageBridge, + Endpoint<PVRManagerChild>&& aVRBridge, + Endpoint<PRemoteDecoderManagerChild>&& aVideoManager, + nsTArray<uint32_t>&& namespaces) { + MOZ_ASSERT(namespaces.Length() == 3); + + // Note that for all of the methods below, if it can fail, it should only + // return false if the failure is an IPDL error. In such situations, + // ContentChild can reason about whether or not to wait for + // RecvReinitRendering (because we surmised the GPU process crashed), or if it + // should crash itself (because we are actually talking to the UI process). If + // there are localized failures (e.g. failed to spawn a thread), then it + // should MOZ_RELEASE_ASSERT or MOZ_CRASH as necessary instead. + if (!CompositorManagerChild::Init(std::move(aCompositor), namespaces[0])) { + return GetResultForRenderingInitFailure(aCompositor.OtherPid()); + } + if (!CompositorManagerChild::CreateContentCompositorBridge(namespaces[1])) { + return GetResultForRenderingInitFailure(aCompositor.OtherPid()); + } + if (!ImageBridgeChild::InitForContent(std::move(aImageBridge), + namespaces[2])) { + return GetResultForRenderingInitFailure(aImageBridge.OtherPid()); + } + if (!gfx::VRManagerChild::InitForContent(std::move(aVRBridge))) { + return GetResultForRenderingInitFailure(aVRBridge.OtherPid()); + } + RemoteDecoderManagerChild::InitForGPUProcess(std::move(aVideoManager)); + +#if defined(XP_MACOSX) && !defined(MOZ_SANDBOX) + // Close all current connections to the WindowServer. This ensures that the + // Activity Monitor will not label the content process as "Not responding" + // because it's not running a native event loop. See bug 1384336. When the + // build is configured with sandbox support, this is called during sandbox + // setup. + CGSShutdownServerConnections(); +#endif + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvReinitRendering( + Endpoint<PCompositorManagerChild>&& aCompositor, + Endpoint<PImageBridgeChild>&& aImageBridge, + Endpoint<PVRManagerChild>&& aVRBridge, + Endpoint<PRemoteDecoderManagerChild>&& aVideoManager, + nsTArray<uint32_t>&& namespaces) { + MOZ_ASSERT(namespaces.Length() == 3); + nsTArray<RefPtr<BrowserChild>> tabs = BrowserChild::GetAll(); + + // Re-establish singleton bridges to the compositor. + if (!CompositorManagerChild::Init(std::move(aCompositor), namespaces[0])) { + return GetResultForRenderingInitFailure(aCompositor.OtherPid()); + } + if (!CompositorManagerChild::CreateContentCompositorBridge(namespaces[1])) { + return GetResultForRenderingInitFailure(aCompositor.OtherPid()); + } + if (!ImageBridgeChild::ReinitForContent(std::move(aImageBridge), + namespaces[2])) { + return GetResultForRenderingInitFailure(aImageBridge.OtherPid()); + } + if (!gfx::VRManagerChild::InitForContent(std::move(aVRBridge))) { + return GetResultForRenderingInitFailure(aVRBridge.OtherPid()); + } + gfxPlatform::GetPlatform()->CompositorUpdated(); + + // Establish new PLayerTransactions. + for (const auto& browserChild : tabs) { + if (browserChild->GetLayersId().IsValid()) { + browserChild->ReinitRendering(); + } + } + + // Notify any observers that the compositor has been reinitialized, + // eg the ZoomConstraintsClients for documents in this process. + // This must occur after the ReinitRendering call above so that the + // APZCTreeManagers have been connected. + nsCOMPtr<nsIObserverService> observerService = services::GetObserverService(); + if (observerService) { + observerService->NotifyObservers(nullptr, "compositor-reinitialized", + nullptr); + } + + RemoteDecoderManagerChild::InitForGPUProcess(std::move(aVideoManager)); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvReinitRenderingForDeviceReset() { + gfxPlatform::GetPlatform()->CompositorUpdated(); + + nsTArray<RefPtr<BrowserChild>> tabs = BrowserChild::GetAll(); + for (const auto& browserChild : tabs) { + if (browserChild->GetLayersId().IsValid()) { + browserChild->ReinitRenderingForDeviceReset(); + } + } + return IPC_OK(); +} + +#if defined(XP_MACOSX) && defined(MOZ_SANDBOX) +extern "C" { +CGError CGSSetDenyWindowServerConnections(bool); +}; + +static void DisconnectWindowServer(bool aIsSandboxEnabled) { + // Close all current connections to the WindowServer. This ensures that the + // Activity Monitor will not label the content process as "Not responding" + // because it's not running a native event loop. See bug 1384336. + // This is required with or without the sandbox enabled. Until the + // window server is blocked as the policy level, this should be called + // just before CGSSetDenyWindowServerConnections() so there are no + // windowserver connections active when CGSSetDenyWindowServerConnections() + // is called. + CGSShutdownServerConnections(); + + // Actual security benefits are only achieved when we additionally deny + // future connections using the sandbox policy. WebGL must be remoted if + // the windowserver connections are blocked. WebGL remoting is disabled + // for some tests. + if (aIsSandboxEnabled && + Preferences::GetBool( + "security.sandbox.content.mac.disconnect-windowserver") && + Preferences::GetBool("webgl.out-of-process")) { + CGError result = CGSSetDenyWindowServerConnections(true); + MOZ_DIAGNOSTIC_ASSERT(result == kCGErrorSuccess); +# if !MOZ_DIAGNOSTIC_ASSERT_ENABLED + Unused << result; +# endif + } +} +#endif + +mozilla::ipc::IPCResult ContentChild::RecvSetProcessSandbox( + const Maybe<mozilla::ipc::FileDescriptor>& aBroker) { + // We may want to move the sandbox initialization somewhere else + // at some point; see bug 880808. +#if defined(MOZ_SANDBOX) + + bool sandboxEnabled = true; +# if defined(XP_LINUX) + // On Linux, we have to support systems that can't use any sandboxing. + sandboxEnabled = SandboxInfo::Get().CanSandboxContent(); + + if (sandboxEnabled && !StaticPrefs::media_cubeb_sandbox()) { + // Pre-start audio before sandboxing; see bug 1443612. + Unused << CubebUtils::GetCubeb(); + } + + if (sandboxEnabled) { + sandboxEnabled = SetContentProcessSandbox( + ContentProcessSandboxParams::ForThisProcess(aBroker)); + } +# elif defined(XP_WIN) + mozilla::SandboxTarget::Instance()->StartSandbox(); +# elif defined(XP_MACOSX) + sandboxEnabled = (GetEffectiveContentSandboxLevel() >= 1); + DisconnectWindowServer(sandboxEnabled); +# endif + + CrashReporter::AnnotateCrashReport( + CrashReporter::Annotation::ContentSandboxEnabled, sandboxEnabled); +# if defined(XP_LINUX) && !defined(ANDROID) + CrashReporter::AnnotateCrashReport( + CrashReporter::Annotation::ContentSandboxCapabilities, + static_cast<int>(SandboxInfo::Get().AsInteger())); +# endif /* XP_LINUX && !ANDROID */ +#endif /* MOZ_SANDBOX */ + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvBidiKeyboardNotify( + const bool& aIsLangRTL, const bool& aHaveBidiKeyboards) { + // bidi is always of type PuppetBidiKeyboard* (because in the child, the only + // possible implementation of nsIBidiKeyboard is PuppetBidiKeyboard). + PuppetBidiKeyboard* bidi = + static_cast<PuppetBidiKeyboard*>(nsContentUtils::GetBidiKeyboard()); + if (bidi) { + bidi->SetBidiKeyboardInfo(aIsLangRTL, aHaveBidiKeyboards); + } + return IPC_OK(); +} + +static StaticRefPtr<CancelableRunnable> gFirstIdleTask; + +static void FirstIdle(void) { + MOZ_ASSERT(gFirstIdleTask); + gFirstIdleTask = nullptr; + + ContentChild::GetSingleton()->SendFirstIdle(); +} + +mozilla::ipc::IPCResult ContentChild::RecvConstructBrowser( + ManagedEndpoint<PBrowserChild>&& aBrowserEp, + ManagedEndpoint<PWindowGlobalChild>&& aWindowEp, const TabId& aTabId, + const IPCTabContext& aContext, const WindowGlobalInit& aWindowInit, + const uint32_t& aChromeFlags, const ContentParentId& aCpID, + const bool& aIsForBrowser, const bool& aIsTopLevel) { + MOZ_DIAGNOSTIC_ASSERT(!IsShuttingDown()); + + static bool hasRunOnce = false; + if (!hasRunOnce) { + hasRunOnce = true; + MOZ_ASSERT(!gFirstIdleTask); + RefPtr<CancelableRunnable> firstIdleTask = + NewCancelableRunnableFunction("FirstIdleRunnable", FirstIdle); + gFirstIdleTask = firstIdleTask; + if (NS_FAILED(NS_DispatchToCurrentThreadQueue(firstIdleTask.forget(), + EventQueuePriority::Idle))) { + gFirstIdleTask = nullptr; + hasRunOnce = false; + } + } + + RefPtr<BrowsingContext> browsingContext = + BrowsingContext::Get(aWindowInit.context().mBrowsingContextId); + if (!browsingContext || browsingContext->IsDiscarded()) { + nsPrintfCString reason("%s initial %s BrowsingContext", + browsingContext ? "discarded" : "missing", + aIsTopLevel ? "top" : "frame"); + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Warning, ("%s", reason.get())); + if (!aIsTopLevel) { + // Recover if the BrowsingContext is missing for a new subframe. The + // `ManagedEndpoint` instances will be automatically destroyed. + NS_WARNING(reason.get()); + return IPC_OK(); + } + + // (these are the only possible values of `reason` at this point) + return browsingContext + ? IPC_FAIL(this, "discarded initial top BrowsingContext") + : IPC_FAIL(this, "missing initial top BrowsingContext"); + } + + if (xpc::IsInAutomation() && + StaticPrefs:: + browser_tabs_remote_testOnly_failPBrowserCreation_enabled()) { + nsAutoCString idString; + if (NS_SUCCEEDED(Preferences::GetCString( + "browser.tabs.remote.testOnly.failPBrowserCreation.browsingContext", + idString))) { + nsresult rv = NS_OK; + uint64_t bcid = idString.ToInteger64(&rv); + if (NS_SUCCEEDED(rv) && bcid == browsingContext->Id()) { + NS_WARNING("Injecting artificial PBrowser creation failure"); + return IPC_OK(); + } + } + } + + if (!aWindowInit.isInitialDocument() || + !NS_IsAboutBlank(aWindowInit.documentURI())) { + return IPC_FAIL(this, + "Logic in CreateDocumentViewerForActor currently requires " + "actors to be initial about:blank documents"); + } + + // We'll happily accept any kind of IPCTabContext here; we don't need to + // check that it's of a certain type for security purposes, because we + // believe whatever the parent process tells us. + MaybeInvalidTabContext tc(aContext); + if (!tc.IsValid()) { + NS_ERROR(nsPrintfCString("Received an invalid TabContext from " + "the parent process. (%s) Crashing...", + tc.GetInvalidReason()) + .get()); + MOZ_CRASH("Invalid TabContext received from the parent process."); + } + + RefPtr<WindowGlobalChild> windowChild = + WindowGlobalChild::CreateDisconnected(aWindowInit); + if (!windowChild) { + return IPC_FAIL(this, "Failed to create initial WindowGlobalChild"); + } + + RefPtr<BrowserChild> browserChild = + BrowserChild::Create(this, aTabId, tc.GetTabContext(), browsingContext, + aChromeFlags, aIsTopLevel); + + // Bind the created BrowserChild to IPC to actually link the actor. + if (NS_WARN_IF(!BindPBrowserEndpoint(std::move(aBrowserEp), browserChild))) { + return IPC_FAIL(this, "BindPBrowserEndpoint failed"); + } + + if (NS_WARN_IF(!browserChild->BindPWindowGlobalEndpoint(std::move(aWindowEp), + windowChild))) { + return IPC_FAIL(this, "BindPWindowGlobalEndpoint failed"); + } + windowChild->Init(); + auto guardNullWindowGlobal = MakeScopeExit([&] { + if (!windowChild->GetWindowGlobal()) { + windowChild->Destroy(); + } + }); + + // Ensure that a BrowsingContext is set for our BrowserChild before + // running `Init`. + MOZ_RELEASE_ASSERT(browserChild->mBrowsingContext->Id() == + aWindowInit.context().mBrowsingContextId); + + if (NS_WARN_IF( + NS_FAILED(browserChild->Init(/* aOpener */ nullptr, windowChild)))) { + return IPC_FAIL(browserChild, "BrowserChild::Init failed"); + } + + nsCOMPtr<nsIObserverService> os = services::GetObserverService(); + if (os) { + os->NotifyObservers(static_cast<nsIBrowserChild*>(browserChild), + "tab-child-created", nullptr); + } + // Notify parent that we are ready to handle input events. + browserChild->SendRemoteIsReadyToHandleInputEvents(); + return IPC_OK(); +} + +void ContentChild::GetAvailableDictionaries( + nsTArray<nsCString>& aDictionaries) { + aDictionaries = mAvailableDictionaries.Clone(); +} + +mozilla::PRemoteSpellcheckEngineChild* +ContentChild::AllocPRemoteSpellcheckEngineChild() { + MOZ_CRASH( + "Default Constructor for PRemoteSpellcheckEngineChild should never be " + "called"); + return nullptr; +} + +bool ContentChild::DeallocPRemoteSpellcheckEngineChild( + PRemoteSpellcheckEngineChild* child) { + delete child; + return true; +} + +mozilla::ipc::IPCResult ContentChild::RecvNotifyEmptyHTTPCache() { + MOZ_ASSERT(NS_IsMainThread()); + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + obs->NotifyObservers(nullptr, "cacheservice:empty-cache", nullptr); + return IPC_OK(); +} + +PHalChild* ContentChild::AllocPHalChild() { return CreateHalChild(); } + +bool ContentChild::DeallocPHalChild(PHalChild* aHal) { + delete aHal; + return true; +} + +devtools::PHeapSnapshotTempFileHelperChild* +ContentChild::AllocPHeapSnapshotTempFileHelperChild() { + return devtools::HeapSnapshotTempFileHelperChild::Create(); +} + +bool ContentChild::DeallocPHeapSnapshotTempFileHelperChild( + devtools::PHeapSnapshotTempFileHelperChild* aHeapSnapshotHelper) { + delete aHeapSnapshotHelper; + return true; +} + +already_AddRefed<PTestShellChild> ContentChild::AllocPTestShellChild() { + return MakeAndAddRef<TestShellChild>(); +} + +mozilla::ipc::IPCResult ContentChild::RecvPTestShellConstructor( + PTestShellChild* actor) { + return IPC_OK(); +} + +RefPtr<GenericPromise> ContentChild::UpdateCookieStatus(nsIChannel* aChannel) { + RefPtr<CookieServiceChild> csChild = CookieServiceChild::GetSingleton(); + NS_ASSERTION(csChild, "Couldn't get CookieServiceChild"); + + return csChild->TrackCookieLoad(aChannel); +} + +PScriptCacheChild* ContentChild::AllocPScriptCacheChild( + const FileDescOrError& cacheFile, const bool& wantCacheData) { + return new loader::ScriptCacheChild(); +} + +bool ContentChild::DeallocPScriptCacheChild(PScriptCacheChild* cache) { + delete static_cast<loader::ScriptCacheChild*>(cache); + return true; +} + +mozilla::ipc::IPCResult ContentChild::RecvPScriptCacheConstructor( + PScriptCacheChild* actor, const FileDescOrError& cacheFile, + const bool& wantCacheData) { + Maybe<FileDescriptor> fd; + if (cacheFile.type() == cacheFile.TFileDescriptor) { + fd.emplace(cacheFile.get_FileDescriptor()); + } + + static_cast<loader::ScriptCacheChild*>(actor)->Init(fd, wantCacheData); + + // Some scripts listen for "app-startup" to start. However, in the content + // process, this category runs before the ScriptPreloader is initialized so + // these scripts wouldn't be added to the cache. Instead, if a script needs to + // run on start up in the content process, it should listen for this category. + NS_CreateServicesFromCategory("content-process-ready-for-script", nullptr, + "content-process-ready-for-script", nullptr); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvNetworkLinkTypeChange( + const uint32_t& aType) { + mNetworkLinkType = aType; + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + if (obs) { + obs->NotifyObservers(nullptr, "contentchild:network-link-type-changed", + nullptr); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSocketProcessCrashed() { + nsIOService::IncreaseSocketProcessCrashCount(); + return IPC_OK(); +} + +PRemotePrintJobChild* ContentChild::AllocPRemotePrintJobChild() { +#ifdef NS_PRINTING + return new RemotePrintJobChild(); +#else + return nullptr; +#endif +} + +already_AddRefed<PClipboardReadRequestChild> +ContentChild::AllocPClipboardReadRequestChild( + const nsTArray<nsCString>& aTypes) { + return MakeAndAddRef<ClipboardReadRequestChild>(aTypes); +} + +media::PMediaChild* ContentChild::AllocPMediaChild() { + return media::AllocPMediaChild(); +} + +bool ContentChild::DeallocPMediaChild(media::PMediaChild* aActor) { + return media::DeallocPMediaChild(aActor); +} + +PBenchmarkStorageChild* ContentChild::AllocPBenchmarkStorageChild() { + return BenchmarkStorageChild::Instance(); +} + +bool ContentChild::DeallocPBenchmarkStorageChild( + PBenchmarkStorageChild* aActor) { + delete aActor; + return true; +} + +#ifdef MOZ_WEBRTC +PWebrtcGlobalChild* ContentChild::AllocPWebrtcGlobalChild() { + auto* child = new WebrtcGlobalChild(); + return child; +} + +bool ContentChild::DeallocPWebrtcGlobalChild(PWebrtcGlobalChild* aActor) { + delete static_cast<WebrtcGlobalChild*>(aActor); + return true; +} +#endif + +mozilla::ipc::IPCResult ContentChild::RecvRegisterChrome( + nsTArray<ChromePackage>&& packages, + nsTArray<SubstitutionMapping>&& resources, + nsTArray<OverrideMapping>&& overrides, const nsCString& locale, + const bool& reset) { + nsCOMPtr<nsIChromeRegistry> registrySvc = nsChromeRegistry::GetService(); + nsChromeRegistryContent* chromeRegistry = + static_cast<nsChromeRegistryContent*>(registrySvc.get()); + if (!chromeRegistry) { + return IPC_FAIL(this, "ChromeRegistryContent is null!"); + } + chromeRegistry->RegisterRemoteChrome(packages, resources, overrides, locale, + reset); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvRegisterChromeItem( + const ChromeRegistryItem& item) { + nsCOMPtr<nsIChromeRegistry> registrySvc = nsChromeRegistry::GetService(); + nsChromeRegistryContent* chromeRegistry = + static_cast<nsChromeRegistryContent*>(registrySvc.get()); + if (!chromeRegistry) { + return IPC_FAIL(this, "ChromeRegistryContent is null!"); + } + switch (item.type()) { + case ChromeRegistryItem::TChromePackage: + chromeRegistry->RegisterPackage(item.get_ChromePackage()); + break; + + case ChromeRegistryItem::TOverrideMapping: + chromeRegistry->RegisterOverride(item.get_OverrideMapping()); + break; + + case ChromeRegistryItem::TSubstitutionMapping: + chromeRegistry->RegisterSubstitution(item.get_SubstitutionMapping()); + break; + + default: + MOZ_ASSERT(false, "bad chrome item"); + return IPC_FAIL_NO_REASON(this); + } + + return IPC_OK(); +} +mozilla::ipc::IPCResult ContentChild::RecvClearStyleSheetCache( + const Maybe<RefPtr<nsIPrincipal>>& aForPrincipal, + const Maybe<nsCString>& aBaseDomain) { + nsIPrincipal* principal = + aForPrincipal ? aForPrincipal.value().get() : nullptr; + const nsCString* baseDomain = aBaseDomain ? aBaseDomain.ptr() : nullptr; + SharedStyleSheetCache::Clear(principal, baseDomain); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvClearImageCacheFromPrincipal( + nsIPrincipal* aPrincipal) { + imgLoader* loader; + if (aPrincipal->OriginAttributesRef().mPrivateBrowsingId == + nsIScriptSecurityManager::DEFAULT_PRIVATE_BROWSING_ID) { + loader = imgLoader::NormalLoader(); + } else { + loader = imgLoader::PrivateBrowsingLoader(); + } + + loader->RemoveEntriesInternal(aPrincipal, nullptr); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvClearImageCacheFromBaseDomain( + const nsCString& aBaseDomain) { + imgLoader::NormalLoader()->RemoveEntriesInternal(nullptr, &aBaseDomain); + imgLoader::PrivateBrowsingLoader()->RemoveEntriesInternal(nullptr, + &aBaseDomain); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvClearImageCache( + const bool& privateLoader, const bool& chrome) { + imgLoader* loader = privateLoader ? imgLoader::PrivateBrowsingLoader() + : imgLoader::NormalLoader(); + + loader->ClearCache(chrome); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSetOffline(const bool& offline) { + nsCOMPtr<nsIIOService> io(do_GetIOService()); + NS_ASSERTION(io, "IO Service can not be null"); + + io->SetOffline(offline); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSetConnectivity( + const bool& connectivity) { + nsCOMPtr<nsIIOService> io(do_GetIOService()); + nsCOMPtr<nsIIOServiceInternal> ioInternal(do_QueryInterface(io)); + NS_ASSERTION(ioInternal, "IO Service can not be null"); + + ioInternal->SetConnectivity(connectivity); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSetCaptivePortalState( + const int32_t& aState) { + nsCOMPtr<nsICaptivePortalService> cps = do_GetService(NS_CAPTIVEPORTAL_CID); + if (!cps) { + return IPC_OK(); + } + + mozilla::net::CaptivePortalService* portal = + static_cast<mozilla::net::CaptivePortalService*>(cps.get()); + portal->SetStateInChild(aState); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSetTRRMode( + const nsIDNSService::ResolverMode& mode, + const nsIDNSService::ResolverMode& modeFromPref) { + RefPtr<net::ChildDNSService> dnsServiceChild = + dont_AddRef(net::ChildDNSService::GetSingleton()); + if (dnsServiceChild) { + dnsServiceChild->SetTRRModeInChild(mode, modeFromPref); + } + return IPC_OK(); +} + +void ContentChild::ActorDestroy(ActorDestroyReason why) { + if (mForceKillTimer) { + mForceKillTimer->Cancel(); + mForceKillTimer = nullptr; + } + + if (AbnormalShutdown == why) { + NS_WARNING("shutting down early because of crash!"); + ProcessChild::QuickExit(); + } + +#ifndef NS_FREE_PERMANENT_DATA + // In release builds, there's no point in the content process + // going through the full XPCOM shutdown path, because it doesn't + // keep persistent state. + ProcessChild::QuickExit(); +#else + // Destroy our JSProcessActors, and reject any pending queries. + JSActorDidDestroy(); + +# if defined(XP_WIN) + RefPtr<DllServices> dllSvc(DllServices::Get()); + dllSvc->DisableFull(); +# endif // defined(XP_WIN) + + if (gFirstIdleTask) { + gFirstIdleTask->Cancel(); + gFirstIdleTask = nullptr; + } + + BlobURLProtocolHandler::RemoveDataEntries(); + + mSharedData = nullptr; + + mAlertObservers.Clear(); + + mIdleObservers.Clear(); + + if (mConsoleListener) { + nsCOMPtr<nsIConsoleService> svc( + do_GetService(NS_CONSOLESERVICE_CONTRACTID)); + if (svc) { + svc->UnregisterListener(mConsoleListener); + mConsoleListener->mChild = nullptr; + } + } + mIsAlive = false; + + CrashReporterClient::DestroySingleton(); + + XRE_ShutdownChildProcess(); +#endif // NS_FREE_PERMANENT_DATA +} + +void ContentChild::ProcessingError(Result aCode, const char* aReason) { + switch (aCode) { + case MsgDropped: + NS_WARNING("MsgDropped in ContentChild"); + return; + + case MsgNotKnown: + case MsgNotAllowed: + case MsgPayloadError: + case MsgProcessingError: + case MsgRouteError: + case MsgValueError: + break; + + default: + MOZ_CRASH("not reached"); + } + + nsDependentCString reason(aReason); + CrashReporter::AnnotateCrashReport( + CrashReporter::Annotation::ipc_channel_error, reason); + + MOZ_CRASH("Content child abort due to IPC error"); +} + +nsresult ContentChild::AddRemoteAlertObserver(const nsString& aData, + nsIObserver* aObserver) { + NS_ASSERTION(aObserver, "Adding a null observer?"); + mAlertObservers.AppendElement(new AlertObserver(aObserver, aData)); + return NS_OK; +} + +mozilla::ipc::IPCResult ContentChild::RecvPreferenceUpdate(const Pref& aPref) { + Preferences::SetPreference(aPref); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvVarUpdate(const GfxVarUpdate& aVar) { + gfx::gfxVars::ApplyUpdate(aVar); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdatePerfStatsCollectionMask( + const uint64_t& aMask) { + PerfStats::SetCollectionMask(static_cast<PerfStats::MetricMask>(aMask)); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvCollectPerfStatsJSON( + CollectPerfStatsJSONResolver&& aResolver) { + aResolver(PerfStats::CollectLocalPerfStatsJSON()); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvCollectScrollingMetrics( + CollectScrollingMetricsResolver&& aResolver) { + auto metrics = ScrollingMetrics::CollectLocalScrollingMetrics(); + using ResolverArgs = std::tuple<const uint32_t&, const uint32_t&>; + aResolver(ResolverArgs(std::get<0>(metrics), std::get<1>(metrics))); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvNotifyAlertsObserver( + const nsCString& aType, const nsString& aData) { + nsTArray<nsCOMPtr<nsIObserver>> observersToNotify; + + mAlertObservers.RemoveElementsBy([&](UniquePtr<AlertObserver>& observer) { + if (!observer->mData.Equals(aData)) { + return false; + } + + // aType == alertfinished, this alert is done and we can remove the + // observer. + observersToNotify.AppendElement(observer->mObserver); + return aType.EqualsLiteral("alertfinished"); + }); + + for (auto& observer : observersToNotify) { + observer->Observe(nullptr, aType.get(), aData.get()); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvNotifyVisited( + nsTArray<VisitedQueryResult>&& aURIs) { + nsCOMPtr<IHistory> history = components::History::Service(); + if (!history) { + return IPC_OK(); + } + for (const VisitedQueryResult& result : aURIs) { + nsCOMPtr<nsIURI> newURI = result.uri(); + if (!newURI) { + return IPC_FAIL_NO_REASON(this); + } + auto status = result.visited() ? IHistory::VisitedStatus::Visited + : IHistory::VisitedStatus::Unvisited; + history->NotifyVisited(newURI, status); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvThemeChanged( + FullLookAndFeel&& aLookAndFeelData, widget::ThemeChangeKind aKind) { + LookAndFeel::SetData(std::move(aLookAndFeelData)); + LookAndFeel::NotifyChangedAllWindows(aKind); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvLoadProcessScript( + const nsString& aURL) { + auto* global = ContentProcessMessageManager::Get(); + global->LoadScript(aURL); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvAsyncMessage( + const nsString& aMsg, const ClonedMessageData& aData) { + AUTO_PROFILER_LABEL_DYNAMIC_LOSSY_NSSTRING("ContentChild::RecvAsyncMessage", + OTHER, aMsg); + MMPrinter::Print("ContentChild::RecvAsyncMessage", aMsg, aData); + + RefPtr<nsFrameMessageManager> cpm = + nsFrameMessageManager::GetChildProcessManager(); + if (cpm) { + StructuredCloneData data; + ipc::UnpackClonedMessageData(aData, data); + cpm->ReceiveMessage(cpm, nullptr, aMsg, false, &data, nullptr, + IgnoreErrors()); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvRegisterStringBundles( + nsTArray<mozilla::dom::StringBundleDescriptor>&& aDescriptors) { + nsCOMPtr<nsIStringBundleService> stringBundleService = + components::StringBundle::Service(); + + for (auto& descriptor : aDescriptors) { + stringBundleService->RegisterContentBundle( + descriptor.bundleURL(), descriptor.mapFile(), descriptor.mapSize()); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateL10nFileSources( + nsTArray<mozilla::dom::L10nFileSourceDescriptor>&& aDescriptors) { + L10nRegistry::RegisterFileSourcesFromParentProcess(aDescriptors); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateSharedData( + const FileDescriptor& aMapFile, const uint32_t& aMapSize, + nsTArray<IPCBlob>&& aBlobs, nsTArray<nsCString>&& aChangedKeys) { + nsTArray<RefPtr<BlobImpl>> blobImpls(aBlobs.Length()); + for (auto& ipcBlob : aBlobs) { + blobImpls.AppendElement(IPCBlobUtils::Deserialize(ipcBlob)); + } + + if (mSharedData) { + mSharedData->Update(aMapFile, aMapSize, std::move(blobImpls), + std::move(aChangedKeys)); + } else { + mSharedData = + new SharedMap(ContentProcessMessageManager::Get()->GetParentObject(), + aMapFile, aMapSize, std::move(blobImpls)); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvFontListChanged() { + gfxPlatformFontList::PlatformFontList()->FontListChanged(); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvForceGlobalReflow( + bool aNeedsReframe) { + gfxPlatform::ForceGlobalReflow(aNeedsReframe ? gfxPlatform::NeedsReframe::Yes + : gfxPlatform::NeedsReframe::No); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvGeolocationUpdate( + nsIDOMGeoPosition* aPosition) { + RefPtr<nsGeolocationService> gs = + nsGeolocationService::GetGeolocationService(); + if (!gs) { + return IPC_OK(); + } + gs->Update(aPosition); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvGeolocationError( + const uint16_t& errorCode) { + RefPtr<nsGeolocationService> gs = + nsGeolocationService::GetGeolocationService(); + if (!gs) { + return IPC_OK(); + } + gs->NotifyError(errorCode); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateDictionaryList( + nsTArray<nsCString>&& aDictionaries) { + mAvailableDictionaries = std::move(aDictionaries); + mozInlineSpellChecker::UpdateCanEnableInlineSpellChecking(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateFontList( + dom::SystemFontList&& aFontList) { + mFontList = std::move(aFontList); + if (gfxPlatform::Initialized()) { + gfxPlatform::GetPlatform()->UpdateFontList(true); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvRebuildFontList( + const bool& aFullRebuild) { + if (gfxPlatform::Initialized()) { + gfxPlatform::GetPlatform()->UpdateFontList(aFullRebuild); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvFontListShmBlockAdded( + const uint32_t& aGeneration, const uint32_t& aIndex, + base::SharedMemoryHandle&& aHandle) { + if (gfxPlatform::Initialized()) { + gfxPlatformFontList::PlatformFontList()->ShmBlockAdded(aGeneration, aIndex, + std::move(aHandle)); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateAppLocales( + nsTArray<nsCString>&& aAppLocales) { + LocaleService::GetInstance()->AssignAppLocales(aAppLocales); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateRequestedLocales( + nsTArray<nsCString>&& aRequestedLocales) { + LocaleService::GetInstance()->AssignRequestedLocales(aRequestedLocales); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSystemTimezoneChanged() { + nsJSUtils::ResetTimeZone(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvAddPermission( + const IPC::Permission& permission) { + nsCOMPtr<nsIPermissionManager> permissionManagerIface = + components::PermissionManager::Service(); + PermissionManager* permissionManager = + static_cast<PermissionManager*>(permissionManagerIface.get()); + MOZ_ASSERT(permissionManager, + "We have no permissionManager in the Content process !"); + + // note we do not need to force mUserContextId to the default here because + // the permission manager does that internally. + nsAutoCString originNoSuffix; + OriginAttributes attrs; + bool success = attrs.PopulateFromOrigin(permission.origin, originNoSuffix); + NS_ENSURE_TRUE(success, IPC_FAIL_NO_REASON(this)); + + nsCOMPtr<nsIURI> uri; + nsresult rv = NS_NewURI(getter_AddRefs(uri), originNoSuffix); + NS_ENSURE_SUCCESS(rv, IPC_OK()); + + nsCOMPtr<nsIPrincipal> principal = + mozilla::BasePrincipal::CreateContentPrincipal(uri, attrs); + + // child processes don't care about modification time. + int64_t modificationTime = 0; + + permissionManager->AddInternal( + principal, nsCString(permission.type), permission.capability, 0, + permission.expireType, permission.expireTime, modificationTime, + PermissionManager::eNotify, PermissionManager::eNoDBOperation); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvRemoveAllPermissions() { + nsCOMPtr<nsIPermissionManager> permissionManagerIface = + components::PermissionManager::Service(); + PermissionManager* permissionManager = + static_cast<PermissionManager*>(permissionManagerIface.get()); + MOZ_ASSERT(permissionManager, + "We have no permissionManager in the Content process !"); + + permissionManager->RemoveAllFromIPC(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvFlushMemory(const nsString& reason) { + nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService(); + if (!mShuttingDown && os) { + os->NotifyObservers(nullptr, "memory-pressure", reason.get()); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvActivateA11y() { +#ifdef ACCESSIBILITY + // Start accessibility in content process if it's running in chrome + // process. + GetOrCreateAccService(nsAccessibilityService::eMainProcess); +#endif // ACCESSIBILITY + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvShutdownA11y() { +#ifdef ACCESSIBILITY + // Try to shutdown accessibility in content process if it's shutting down in + // chrome process. + MaybeShutdownAccService(nsAccessibilityService::eMainProcess); +#endif + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvApplicationForeground() { + // Rebroadcast the "application-foreground" + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + if (obs) { + obs->NotifyObservers(nullptr, "application-foreground", nullptr); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvApplicationBackground() { + // Rebroadcast the "application-background" + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + if (obs) { + obs->NotifyObservers(nullptr, "application-background", nullptr); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvGarbageCollect() { + // Rebroadcast the "child-gc-request" so that workers will GC. + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + if (obs) { + obs->NotifyObservers(nullptr, "child-gc-request", nullptr); + } + nsJSContext::GarbageCollectNow(JS::GCReason::DOM_IPC); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvCycleCollect() { + // Rebroadcast the "child-cc-request" so that workers will CC. + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + if (obs) { + obs->NotifyObservers(nullptr, "child-cc-request", nullptr); + } + nsJSContext::CycleCollectNow(CCReason::IPC_MESSAGE); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUnlinkGhosts() { +#ifdef DEBUG + nsWindowMemoryReporter::UnlinkGhostWindows(); +#endif + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvAppInfo( + const nsCString& version, const nsCString& buildID, const nsCString& name, + const nsCString& UAName, const nsCString& ID, const nsCString& vendor, + const nsCString& sourceURL, const nsCString& updateURL) { + mAppInfo.version.Assign(version); + mAppInfo.buildID.Assign(buildID); + mAppInfo.name.Assign(name); + mAppInfo.UAName.Assign(UAName); + mAppInfo.ID.Assign(ID); + mAppInfo.vendor.Assign(vendor); + mAppInfo.sourceURL.Assign(sourceURL); + mAppInfo.updateURL.Assign(updateURL); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvRemoteType( + const nsCString& aRemoteType, const nsCString& aProfile) { + if (aRemoteType == mRemoteType) { + // Allocation of preallocated processes that are still launching can + // cause this + return IPC_OK(); + } + + if (!mRemoteType.IsVoid()) { + // Preallocated processes are type PREALLOC_REMOTE_TYPE; they may not + // become a File: process, or Privileged About Content Process + MOZ_LOG(ContentParent::GetLog(), LogLevel::Debug, + ("Changing remoteType of process %d from %s to %s", getpid(), + mRemoteType.get(), aRemoteType.get())); + // prealloc->anything (but file) or web->web allowed, and no-change + MOZ_RELEASE_ASSERT(mRemoteType == PREALLOC_REMOTE_TYPE && + aRemoteType != FILE_REMOTE_TYPE && + aRemoteType != PRIVILEGEDABOUT_REMOTE_TYPE); + } else { + // Initial setting of remote type. Either to 'prealloc' or the actual + // final type (if we didn't use a preallocated process) + MOZ_LOG(ContentParent::GetLog(), LogLevel::Debug, + ("Setting remoteType of process %d to %s", getpid(), + aRemoteType.get())); + + if (aRemoteType == PREALLOC_REMOTE_TYPE) { + PreallocInit(); + } + } + + auto remoteTypePrefix = RemoteTypePrefix(aRemoteType); + + // Must do before SetProcessName + mRemoteType.Assign(aRemoteType); + + // Update the process name so about:memory's process names are more obvious. + if (aRemoteType == FILE_REMOTE_TYPE) { + SetProcessName("file:// Content"_ns, nullptr, &aProfile); + } else if (aRemoteType == EXTENSION_REMOTE_TYPE) { + SetProcessName("WebExtensions"_ns, nullptr, &aProfile); + } else if (aRemoteType == PRIVILEGEDABOUT_REMOTE_TYPE) { + SetProcessName("Privileged Content"_ns, nullptr, &aProfile); + } else if (aRemoteType == PRIVILEGEDMOZILLA_REMOTE_TYPE) { + SetProcessName("Privileged Mozilla"_ns, nullptr, &aProfile); + } else if (remoteTypePrefix == WITH_COOP_COEP_REMOTE_TYPE) { + // The profiler can sanitize out the eTLD+1 + nsDependentCSubstring etld = + Substring(aRemoteType, WITH_COOP_COEP_REMOTE_TYPE.Length() + 1); +#ifdef NIGHTLY_BUILD + SetProcessName("WebCOOP+COEP Content"_ns, &etld, &aProfile); +#else + SetProcessName("Isolated Web Content"_ns, &etld, + &aProfile); // to avoid confusing people +#endif + } else if (remoteTypePrefix == FISSION_WEB_REMOTE_TYPE) { + // The profiler can sanitize out the eTLD+1 + nsDependentCSubstring etld = + Substring(aRemoteType, FISSION_WEB_REMOTE_TYPE.Length() + 1); + SetProcessName("Isolated Web Content"_ns, &etld, &aProfile); + } else if (remoteTypePrefix == SERVICEWORKER_REMOTE_TYPE) { + // The profiler can sanitize out the eTLD+1 + nsDependentCSubstring etld = + Substring(aRemoteType, SERVICEWORKER_REMOTE_TYPE.Length() + 1); + SetProcessName("Isolated Service Worker"_ns, &etld, &aProfile); + } else { + // else "prealloc" or "web" type -> "Web Content" + SetProcessName("Web Content"_ns, nullptr, &aProfile); + } + + // Turn off Spectre mitigations in isolated web content processes. + if (StaticPrefs::javascript_options_spectre_disable_for_isolated_content() && + (remoteTypePrefix == FISSION_WEB_REMOTE_TYPE || + remoteTypePrefix == SERVICEWORKER_REMOTE_TYPE || + remoteTypePrefix == WITH_COOP_COEP_REMOTE_TYPE || + aRemoteType == PRIVILEGEDABOUT_REMOTE_TYPE || + aRemoteType == PRIVILEGEDMOZILLA_REMOTE_TYPE)) { + JS::DisableSpectreMitigationsAfterInit(); + } + + // Use the prefix to avoid URIs from Fission isolated processes. + CrashReporter::AnnotateCrashReport(CrashReporter::Annotation::RemoteType, + remoteTypePrefix); + + // Defer RemoteWorkerService initialization until the child process does + // receive its specific remoteType and can become actionable for the + // RemoteWorkerManager in the parent process. + if (mRemoteType != PREALLOC_REMOTE_TYPE) { + RemoteWorkerService::Initialize(); + } + + return IPC_OK(); +} + +// A method to initialize anything we need during the preallocation phase +void ContentChild::PreallocInit() { + EnsureNSSInitializedChromeOrContent(); + + // SetAcceptLanguages() needs to read localized strings (file access), + // which is slow, so do this in prealloc + nsHttpHandler::PresetAcceptLanguages(); +} + +// Call RemoteTypePrefix() on the result to remove URIs if you want to use this +// for telemetry. +const nsACString& ContentChild::GetRemoteType() const { return mRemoteType; } + +mozilla::ipc::IPCResult ContentChild::RecvInitBlobURLs( + nsTArray<BlobURLRegistrationData>&& aRegistrations) { + for (uint32_t i = 0; i < aRegistrations.Length(); ++i) { + BlobURLRegistrationData& registration = aRegistrations[i]; + RefPtr<BlobImpl> blobImpl = IPCBlobUtils::Deserialize(registration.blob()); + MOZ_ASSERT(blobImpl); + + BlobURLProtocolHandler::AddDataEntry(registration.url(), + registration.principal(), + registration.partitionKey(), blobImpl); + // If we have received an already-revoked blobURL, we have to keep it alive + // for a while (see BlobURLProtocolHandler) in order to support pending + // operations such as navigation, download and so on. + if (registration.revoked()) { + BlobURLProtocolHandler::RemoveDataEntry(registration.url(), false); + } + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvInitJSActorInfos( + nsTArray<JSProcessActorInfo>&& aContentInfos, + nsTArray<JSWindowActorInfo>&& aWindowInfos) { + RefPtr<JSActorService> actSvc = JSActorService::GetSingleton(); + actSvc->LoadJSActorInfos(aContentInfos, aWindowInfos); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUnregisterJSWindowActor( + const nsCString& aName) { + RefPtr<JSActorService> actSvc = JSActorService::GetSingleton(); + actSvc->UnregisterWindowActor(aName); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUnregisterJSProcessActor( + const nsCString& aName) { + RefPtr<JSActorService> actSvc = JSActorService::GetSingleton(); + actSvc->UnregisterProcessActor(aName); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvLastPrivateDocShellDestroyed() { + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + obs->NotifyObservers(nullptr, "last-pb-context-exited", nullptr); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvNotifyProcessPriorityChanged( + const hal::ProcessPriority& aPriority) { + nsCOMPtr<nsIObserverService> os = services::GetObserverService(); + NS_ENSURE_TRUE(os, IPC_OK()); + + RefPtr<nsHashPropertyBag> props = new nsHashPropertyBag(); + props->SetPropertyAsInt32(u"priority"_ns, static_cast<int32_t>(aPriority)); + + PROFILER_MARKER("Process Priority", OTHER, + mozilla::MarkerThreadId::MainThread(), ProcessPriorityChange, + ProfilerString8View::WrapNullTerminatedString( + ProcessPriorityToString(mProcessPriority)), + ProfilerString8View::WrapNullTerminatedString( + ProcessPriorityToString(aPriority))); + + // Record FOG data before the priority change. + // Ignore the change if it's the first time we set the process priority. + if (mProcessPriority != hal::PROCESS_PRIORITY_UNKNOWN) { + glean::RecordPowerMetrics(); + } + + ConfigureThreadPerformanceHints(aPriority); + + mProcessPriority = aPriority; + + os->NotifyObservers(static_cast<nsIPropertyBag2*>(props), + "ipc:process-priority-changed", nullptr); + if (StaticPrefs:: + dom_memory_foreground_content_processes_have_larger_page_cache()) { + if (mProcessPriority >= hal::PROCESS_PRIORITY_FOREGROUND) { + // Note: keep this in sync with the JS shell (js/src/shell/js.cpp). + moz_set_max_dirty_page_modifier(4); + } else if (mProcessPriority == hal::PROCESS_PRIORITY_BACKGROUND) { + moz_set_max_dirty_page_modifier(-2); + } else { + moz_set_max_dirty_page_modifier(0); + } + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvMinimizeMemoryUsage() { + nsCOMPtr<nsIMemoryReporterManager> mgr = + do_GetService("@mozilla.org/memory-reporter-manager;1"); + NS_ENSURE_TRUE(mgr, IPC_OK()); + + Unused << mgr->MinimizeMemoryUsage(/* callback = */ nullptr); + return IPC_OK(); +} + +void ContentChild::AddIdleObserver(nsIObserver* aObserver, + uint32_t aIdleTimeInS) { + MOZ_ASSERT(aObserver, "null idle observer"); + // Make sure aObserver isn't released while we wait for the parent + aObserver->AddRef(); + SendAddIdleObserver(reinterpret_cast<uint64_t>(aObserver), aIdleTimeInS); + mIdleObservers.Insert(aObserver); +} + +void ContentChild::RemoveIdleObserver(nsIObserver* aObserver, + uint32_t aIdleTimeInS) { + MOZ_ASSERT(aObserver, "null idle observer"); + SendRemoveIdleObserver(reinterpret_cast<uint64_t>(aObserver), aIdleTimeInS); + aObserver->Release(); + mIdleObservers.Remove(aObserver); +} + +mozilla::ipc::IPCResult ContentChild::RecvNotifyIdleObserver( + const uint64_t& aObserver, const nsCString& aTopic, + const nsString& aTimeStr) { + nsIObserver* observer = reinterpret_cast<nsIObserver*>(aObserver); + if (mIdleObservers.Contains(observer)) { + observer->Observe(nullptr, aTopic.get(), aTimeStr.get()); + } else { + NS_WARNING("Received notification for an idle observer that was removed."); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvLoadAndRegisterSheet( + nsIURI* aURI, const uint32_t& aType) { + if (!aURI) { + return IPC_OK(); + } + + nsStyleSheetService* sheetService = nsStyleSheetService::GetInstance(); + if (sheetService) { + sheetService->LoadAndRegisterSheet(aURI, aType); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUnregisterSheet( + nsIURI* aURI, const uint32_t& aType) { + if (!aURI) { + return IPC_OK(); + } + + nsStyleSheetService* sheetService = nsStyleSheetService::GetInstance(); + if (sheetService) { + sheetService->UnregisterSheet(aURI, aType); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvDomainSetChanged( + const uint32_t& aSetType, const uint32_t& aChangeType, nsIURI* aDomain) { + if (aChangeType == ACTIVATE_POLICY) { + if (mPolicy) { + return IPC_OK(); + } + nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager(); + MOZ_ASSERT(ssm); + ssm->ActivateDomainPolicyInternal(getter_AddRefs(mPolicy)); + if (!mPolicy) { + return IPC_FAIL_NO_REASON(this); + } + return IPC_OK(); + } + if (!mPolicy) { + MOZ_ASSERT_UNREACHABLE( + "If the domain policy is not active yet," + " the first message should be ACTIVATE_POLICY"); + return IPC_FAIL_NO_REASON(this); + } + + NS_ENSURE_TRUE(mPolicy, IPC_FAIL_NO_REASON(this)); + + if (aChangeType == DEACTIVATE_POLICY) { + mPolicy->Deactivate(); + mPolicy = nullptr; + return IPC_OK(); + } + + nsCOMPtr<nsIDomainSet> set; + switch (aSetType) { + case BLOCKLIST: + mPolicy->GetBlocklist(getter_AddRefs(set)); + break; + case SUPER_BLOCKLIST: + mPolicy->GetSuperBlocklist(getter_AddRefs(set)); + break; + case ALLOWLIST: + mPolicy->GetAllowlist(getter_AddRefs(set)); + break; + case SUPER_ALLOWLIST: + mPolicy->GetSuperAllowlist(getter_AddRefs(set)); + break; + default: + MOZ_ASSERT_UNREACHABLE("Unexpected setType"); + return IPC_FAIL_NO_REASON(this); + } + + MOZ_ASSERT(set); + + switch (aChangeType) { + case ADD_DOMAIN: + NS_ENSURE_TRUE(aDomain, IPC_FAIL_NO_REASON(this)); + set->Add(aDomain); + break; + case REMOVE_DOMAIN: + NS_ENSURE_TRUE(aDomain, IPC_FAIL_NO_REASON(this)); + set->Remove(aDomain); + break; + case CLEAR_DOMAINS: + set->Clear(); + break; + default: + MOZ_ASSERT_UNREACHABLE("Unexpected changeType"); + return IPC_FAIL_NO_REASON(this); + } + + return IPC_OK(); +} + +void ContentChild::StartForceKillTimer() { + if (mForceKillTimer) { + return; + } + + int32_t timeoutSecs = StaticPrefs::dom_ipc_tabs_shutdownTimeoutSecs(); + if (timeoutSecs > 0) { + NS_NewTimerWithFuncCallback(getter_AddRefs(mForceKillTimer), + ContentChild::ForceKillTimerCallback, this, + timeoutSecs * 1000, nsITimer::TYPE_ONE_SHOT, + "dom::ContentChild::StartForceKillTimer"); + MOZ_ASSERT(mForceKillTimer); + } +} + +/* static */ +void ContentChild::ForceKillTimerCallback(nsITimer* aTimer, void* aClosure) { + ProcessChild::QuickExit(); +} + +mozilla::ipc::IPCResult ContentChild::RecvShutdownConfirmedHP() { + CrashReporter::AppendToCrashReportAnnotation( + CrashReporter::Annotation::IPCShutdownState, + "RecvShutdownConfirmedHP entry"_ns); + + // Bug 1755376: If we see "RecvShutdownConfirmedHP entry" often in + // bug IPCError_ShutDownKill we might want to anticipate + // ShutdownPhase::AppShutdownConfirmed to start here. + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvShutdown() { + CrashReporter::AppendToCrashReportAnnotation( + CrashReporter::Annotation::IPCShutdownState, "RecvShutdown entry"_ns); + + // Signal the ongoing shutdown to AppShutdown, this + // will make abort nested SpinEventLoopUntilOrQuit loops + AppShutdown::AdvanceShutdownPhaseWithoutNotify( + ShutdownPhase::AppShutdownConfirmed); + + nsCOMPtr<nsIObserverService> os = services::GetObserverService(); + if (os) { + CrashReporter::AppendToCrashReportAnnotation( + CrashReporter::Annotation::IPCShutdownState, + "content-child-will-shutdown started"_ns); + + os->NotifyObservers(ToSupports(this), "content-child-will-shutdown", + nullptr); + } + + ShutdownInternal(); + return IPC_OK(); +} + +void ContentChild::ShutdownInternal() { + CrashReporter::AppendToCrashReportAnnotation( + CrashReporter::Annotation::IPCShutdownState, "ShutdownInternal entry"_ns); + + // If we receive the shutdown message from within a nested event loop, we want + // to wait for that event loop to finish. Otherwise we could prematurely + // terminate an "unload" or "pagehide" event handler (which might be doing a + // sync XHR, for example). + + MOZ_ASSERT(NS_IsMainThread()); + RefPtr<nsThread> mainThread = nsThreadManager::get().GetCurrentThread(); + // Note that we only have to check the recursion count for the current + // cooperative thread. Since the Shutdown message is not labeled with a + // SchedulerGroup, there can be no other cooperative threads doing work while + // we're running. + if (mainThread && mainThread->RecursionDepth() > 1) { + // We're in a nested event loop. Let's delay for an arbitrary period of + // time (100ms) in the hopes that the event loop will have finished by + // then. + GetCurrentSerialEventTarget()->DelayedDispatch( + NewRunnableMethod("dom::ContentChild::RecvShutdown", this, + &ContentChild::ShutdownInternal), + 100); + return; + } + + mShuttingDown = true; + +#ifdef NIGHTLY_BUILD + BackgroundHangMonitor::UnregisterAnnotator( + PendingInputEventHangAnnotator::sSingleton); +#endif + + if (mPolicy) { + mPolicy->Deactivate(); + mPolicy = nullptr; + } + + nsCOMPtr<nsIObserverService> os = services::GetObserverService(); + if (os) { + CrashReporter::AppendToCrashReportAnnotation( + CrashReporter::Annotation::IPCShutdownState, + "content-child-shutdown started"_ns); + os->NotifyObservers(ToSupports(this), "content-child-shutdown", nullptr); + } + + GetIPCChannel()->SetAbortOnError(false); + + if (mProfilerController) { + const bool isProfiling = profiler_is_active(); + CrashReporter::AnnotateCrashReport( + CrashReporter::Annotation::ProfilerChildShutdownPhase, + isProfiling ? "Profiling - GrabShutdownProfileAndShutdown"_ns + : "Not profiling - GrabShutdownProfileAndShutdown"_ns); + ProfileAndAdditionalInformation shutdownProfileAndAdditionalInformation = + mProfilerController->GrabShutdownProfileAndShutdown(); + CrashReporter::AnnotateCrashReport( + CrashReporter::Annotation::ProfilerChildShutdownPhase, + isProfiling ? "Profiling - Destroying ChildProfilerController"_ns + : "Not profiling - Destroying ChildProfilerController"_ns); + mProfilerController = nullptr; + CrashReporter::AnnotateCrashReport( + CrashReporter::Annotation::ProfilerChildShutdownPhase, + isProfiling ? "Profiling - SendShutdownProfile (sending)"_ns + : "Not profiling - SendShutdownProfile (sending)"_ns); + if (const size_t len = shutdownProfileAndAdditionalInformation.SizeOf(); + len >= size_t(IPC::Channel::kMaximumMessageSize)) { + shutdownProfileAndAdditionalInformation.mProfile = nsPrintfCString( + "*Profile from pid %u bigger (%zu) than IPC max (%zu)", + unsigned(profiler_current_process_id().ToNumber()), len, + size_t(IPC::Channel::kMaximumMessageSize)); + } + // Send the shutdown profile to the parent process through our own + // message channel, which we know will survive for long enough. + bool sent = + SendShutdownProfile(shutdownProfileAndAdditionalInformation.mProfile); + CrashReporter::AnnotateCrashReport( + CrashReporter::Annotation::ProfilerChildShutdownPhase, + sent ? (isProfiling ? "Profiling - SendShutdownProfile (sent)"_ns + : "Not profiling - SendShutdownProfile (sent)"_ns) + : (isProfiling + ? "Profiling - SendShutdownProfile (failed)"_ns + : "Not profiling - SendShutdownProfile (failed)"_ns)); + } + + if (PerfStats::GetCollectionMask() != 0) { + SendShutdownPerfStats(PerfStats::CollectLocalPerfStatsJSON()); + } + + // Start a timer that will ensure we quickly exit after a reasonable period + // of time. Prevents shutdown hangs after our connection to the parent + // closes or when the parent is too busy to ever kill us. + CrashReporter::AppendToCrashReportAnnotation( + CrashReporter::Annotation::IPCShutdownState, "StartForceKillTimer"_ns); + StartForceKillTimer(); + + CrashReporter::AppendToCrashReportAnnotation( + CrashReporter::Annotation::IPCShutdownState, + "SendFinishShutdown (sending)"_ns); + + // Notify the parent that we are done with shutdown. This is sent with high + // priority and will just flag we are done. + Unused << SendNotifyShutdownSuccess(); + + // Now tell the parent to actually destroy our channel which will make end + // our process. This is expected to be the last event the parent will + // ever process for this ContentChild. + bool sent = SendFinishShutdown(); + + CrashReporter::AppendToCrashReportAnnotation( + CrashReporter::Annotation::IPCShutdownState, + sent ? "SendFinishShutdown (sent)"_ns : "SendFinishShutdown (failed)"_ns); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateWindow( + const uintptr_t& aChildId) { + MOZ_ASSERT( + false, + "ContentChild::RecvUpdateWindow calls unexpected on this platform."); + return IPC_FAIL_NO_REASON(this); +} + +PContentPermissionRequestChild* +ContentChild::AllocPContentPermissionRequestChild( + Span<const PermissionRequest> aRequests, nsIPrincipal* aPrincipal, + nsIPrincipal* aTopLevelPrincipal, const bool& aIsHandlingUserInput, + const bool& aMaybeUnsafePermissionDelegate, const TabId& aTabId) { + MOZ_CRASH("unused"); + return nullptr; +} + +bool ContentChild::DeallocPContentPermissionRequestChild( + PContentPermissionRequestChild* actor) { + nsContentPermissionUtils::NotifyRemoveContentPermissionRequestChild(actor); + auto child = static_cast<RemotePermissionRequest*>(actor); + child->IPDLRelease(); + return true; +} + +already_AddRefed<PWebBrowserPersistDocumentChild> +ContentChild::AllocPWebBrowserPersistDocumentChild( + PBrowserChild* aBrowser, const MaybeDiscarded<BrowsingContext>& aContext) { + return MakeAndAddRef<WebBrowserPersistDocumentChild>(); +} + +mozilla::ipc::IPCResult ContentChild::RecvPWebBrowserPersistDocumentConstructor( + PWebBrowserPersistDocumentChild* aActor, PBrowserChild* aBrowser, + const MaybeDiscarded<BrowsingContext>& aContext) { + if (NS_WARN_IF(!aBrowser)) { + return IPC_FAIL_NO_REASON(this); + } + + if (aContext.IsNullOrDiscarded()) { + aActor->SendInitFailure(NS_ERROR_NO_CONTENT); + return IPC_OK(); + } + + nsCOMPtr<Document> foundDoc = aContext.get()->GetDocument(); + + if (!foundDoc) { + aActor->SendInitFailure(NS_ERROR_NO_CONTENT); + } else { + static_cast<WebBrowserPersistDocumentChild*>(aActor)->Start(foundDoc); + } + return IPC_OK(); +} + +static already_AddRefed<DataTransfer> ConvertToDataTransfer( + nsTArray<IPCTransferableData>&& aTransferables, EventMessage aMessage) { + // Check if we are receiving any file objects. If we are we will want + // to hide any of the other objects coming in from content. + bool hasFiles = false; + for (uint32_t i = 0; i < aTransferables.Length() && !hasFiles; ++i) { + auto& items = aTransferables[i].items(); + for (uint32_t j = 0; j < items.Length() && !hasFiles; ++j) { + if (items[j].data().type() == + IPCTransferableDataType::TIPCTransferableDataBlob) { + hasFiles = true; + } + } + } + // Add the entries from the IPC to the new DataTransfer + RefPtr<DataTransfer> dataTransfer = + new DataTransfer(nullptr, aMessage, false, -1); + for (uint32_t i = 0; i < aTransferables.Length(); ++i) { + auto& items = aTransferables[i].items(); + for (uint32_t j = 0; j < items.Length(); ++j) { + const IPCTransferableDataItem& item = items[j]; + RefPtr<nsVariantCC> variant = new nsVariantCC(); + nsresult rv = + nsContentUtils::IPCTransferableDataItemToVariant(item, variant); + if (NS_FAILED(rv)) { + continue; + } + + // We should hide this data from content if we have a file, and we + // aren't a file. + bool hidden = + hasFiles && item.data().type() != + IPCTransferableDataType::TIPCTransferableDataBlob; + dataTransfer->SetDataWithPrincipalFromOtherProcess( + NS_ConvertUTF8toUTF16(item.flavor()), variant, i, + nsContentUtils::GetSystemPrincipal(), hidden); + } + } + return dataTransfer.forget(); +} + +mozilla::ipc::IPCResult ContentChild::RecvInvokeDragSession( + const MaybeDiscarded<WindowContext>& aSourceWindowContext, + const MaybeDiscarded<WindowContext>& aSourceTopWindowContext, + nsTArray<IPCTransferableData>&& aTransferables, const uint32_t& aAction) { + if (nsCOMPtr<nsIDragService> dragService = + do_GetService("@mozilla.org/widget/dragservice;1")) { + dragService->StartDragSession(); + nsCOMPtr<nsIDragSession> session; + dragService->GetCurrentSession(getter_AddRefs(session)); + if (session) { + session->SetSourceWindowContext(aSourceWindowContext.GetMaybeDiscarded()); + session->SetSourceTopWindowContext( + aSourceTopWindowContext.GetMaybeDiscarded()); + session->SetDragAction(aAction); + + RefPtr<DataTransfer> dataTransfer = + ConvertToDataTransfer(std::move(aTransferables), eDragStart); + session->SetDataTransfer(dataTransfer); + } + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateDragSession( + nsTArray<IPCTransferableData>&& aTransferables, + EventMessage aEventMessage) { + if (nsCOMPtr<nsIDragService> dragService = + do_GetService("@mozilla.org/widget/dragservice;1")) { + nsCOMPtr<nsIDragSession> session; + dragService->GetCurrentSession(getter_AddRefs(session)); + if (session) { + nsCOMPtr<DataTransfer> dataTransfer = + ConvertToDataTransfer(std::move(aTransferables), aEventMessage); + session->SetDataTransfer(dataTransfer); + } + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvEndDragSession( + const bool& aDoneDrag, const bool& aUserCancelled, + const LayoutDeviceIntPoint& aDragEndPoint, const uint32_t& aKeyModifiers, + const uint32_t& aDropEffect) { + nsCOMPtr<nsIDragService> dragService = + do_GetService("@mozilla.org/widget/dragservice;1"); + if (dragService) { + nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession(); + if (dragSession) { + if (aUserCancelled) { + dragSession->UserCancelled(); + } + + RefPtr<DataTransfer> dataTransfer = dragSession->GetDataTransfer(); + if (dataTransfer) { + dataTransfer->SetDropEffectInt(aDropEffect); + } + } + + static_cast<nsBaseDragService*>(dragService.get()) + ->SetDragEndPoint(aDragEndPoint); + dragService->EndDragSession(aDoneDrag, aKeyModifiers); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvPush(const nsCString& aScope, + nsIPrincipal* aPrincipal, + const nsString& aMessageId) { + PushMessageDispatcher dispatcher(aScope, aPrincipal, aMessageId, Nothing()); + Unused << NS_WARN_IF(NS_FAILED(dispatcher.NotifyObserversAndWorkers())); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvPushWithData( + const nsCString& aScope, nsIPrincipal* aPrincipal, + const nsString& aMessageId, nsTArray<uint8_t>&& aData) { + PushMessageDispatcher dispatcher(aScope, aPrincipal, aMessageId, + Some(std::move(aData))); + Unused << NS_WARN_IF(NS_FAILED(dispatcher.NotifyObserversAndWorkers())); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvPushSubscriptionChange( + const nsCString& aScope, nsIPrincipal* aPrincipal) { + PushSubscriptionChangeDispatcher dispatcher(aScope, aPrincipal); + Unused << NS_WARN_IF(NS_FAILED(dispatcher.NotifyObserversAndWorkers())); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvPushError(const nsCString& aScope, + nsIPrincipal* aPrincipal, + const nsString& aMessage, + const uint32_t& aFlags) { + PushErrorDispatcher dispatcher(aScope, aPrincipal, aMessage, aFlags); + Unused << NS_WARN_IF(NS_FAILED(dispatcher.NotifyObserversAndWorkers())); + return IPC_OK(); +} + +mozilla::ipc::IPCResult +ContentChild::RecvNotifyPushSubscriptionModifiedObservers( + const nsCString& aScope, nsIPrincipal* aPrincipal) { + PushSubscriptionModifiedDispatcher dispatcher(aScope, aPrincipal); + Unused << NS_WARN_IF(NS_FAILED(dispatcher.NotifyObservers())); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvBlobURLRegistration( + const nsCString& aURI, const IPCBlob& aBlob, nsIPrincipal* aPrincipal, + const nsCString& aPartitionKey) { + RefPtr<BlobImpl> blobImpl = IPCBlobUtils::Deserialize(aBlob); + MOZ_ASSERT(blobImpl); + + BlobURLProtocolHandler::AddDataEntry(aURI, aPrincipal, aPartitionKey, + blobImpl); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvBlobURLUnregistration( + const nsCString& aURI) { + BlobURLProtocolHandler::RemoveDataEntry( + aURI, + /* aBroadcastToOtherProcesses = */ false); + return IPC_OK(); +} + +void ContentChild::CreateGetFilesRequest(const nsAString& aDirectoryPath, + bool aRecursiveFlag, nsID& aUUID, + GetFilesHelperChild* aChild) { + MOZ_ASSERT(aChild); + MOZ_ASSERT(!mGetFilesPendingRequests.Contains(aUUID)); + + Unused << SendGetFilesRequest(aUUID, aDirectoryPath, aRecursiveFlag); + mGetFilesPendingRequests.InsertOrUpdate(aUUID, RefPtr{aChild}); +} + +void ContentChild::DeleteGetFilesRequest(nsID& aUUID, + GetFilesHelperChild* aChild) { + MOZ_ASSERT(aChild); + MOZ_ASSERT(mGetFilesPendingRequests.Contains(aUUID)); + + Unused << SendDeleteGetFilesRequest(aUUID); + mGetFilesPendingRequests.Remove(aUUID); +} + +mozilla::ipc::IPCResult ContentChild::RecvGetFilesResponse( + const nsID& aUUID, const GetFilesResponseResult& aResult) { + RefPtr<GetFilesHelperChild> child; + + // This object can already been deleted in case DeleteGetFilesRequest has + // been called when the response was sending by the parent. + if (!mGetFilesPendingRequests.Remove(aUUID, getter_AddRefs(child))) { + return IPC_OK(); + } + + if (aResult.type() == GetFilesResponseResult::TGetFilesResponseFailure) { + child->Finished(aResult.get_GetFilesResponseFailure().errorCode()); + } else { + MOZ_ASSERT(aResult.type() == + GetFilesResponseResult::TGetFilesResponseSuccess); + + const nsTArray<IPCBlob>& ipcBlobs = + aResult.get_GetFilesResponseSuccess().blobs(); + + bool succeeded = true; + for (uint32_t i = 0; succeeded && i < ipcBlobs.Length(); ++i) { + RefPtr<BlobImpl> impl = IPCBlobUtils::Deserialize(ipcBlobs[i]); + succeeded = child->AppendBlobImpl(impl); + } + + child->Finished(succeeded ? NS_OK : NS_ERROR_OUT_OF_MEMORY); + } + return IPC_OK(); +} + +/* static */ +void ContentChild::FatalErrorIfNotUsingGPUProcess(const char* const aErrorMsg, + base::ProcessId aOtherPid) { + // If we're communicating with the same process or the UI process then we + // want to crash normally. Otherwise we want to just warn as the other end + // must be the GPU process and it crashing shouldn't be fatal for us. + if (aOtherPid == base::GetCurrentProcId() || + (GetSingleton() && GetSingleton()->OtherPid() == aOtherPid)) { + mozilla::ipc::FatalError(aErrorMsg, false); + } else { + nsAutoCString formattedMessage("IPDL error: \""); + formattedMessage.AppendASCII(aErrorMsg); + formattedMessage.AppendLiteral(R"(".)"); + NS_WARNING(formattedMessage.get()); + } +} + +PURLClassifierChild* ContentChild::AllocPURLClassifierChild( + nsIPrincipal* aPrincipal, bool* aSuccess) { + *aSuccess = true; + return new URLClassifierChild(); +} + +bool ContentChild::DeallocPURLClassifierChild(PURLClassifierChild* aActor) { + MOZ_ASSERT(aActor); + delete aActor; + return true; +} + +PURLClassifierLocalChild* ContentChild::AllocPURLClassifierLocalChild( + nsIURI* aUri, Span<const IPCURLClassifierFeature> aFeatures) { + return new URLClassifierLocalChild(); +} + +bool ContentChild::DeallocPURLClassifierLocalChild( + PURLClassifierLocalChild* aActor) { + MOZ_ASSERT(aActor); + delete aActor; + return true; +} + +PSessionStorageObserverChild* +ContentChild::AllocPSessionStorageObserverChild() { + MOZ_CRASH( + "PSessionStorageObserverChild actors should be manually constructed!"); +} + +bool ContentChild::DeallocPSessionStorageObserverChild( + PSessionStorageObserverChild* aActor) { + MOZ_ASSERT(aActor); + + delete aActor; + return true; +} + +mozilla::ipc::IPCResult ContentChild::RecvProvideAnonymousTemporaryFile( + const uint64_t& aID, const FileDescOrError& aFDOrError) { + mozilla::UniquePtr<AnonymousTemporaryFileCallback> callback; + mPendingAnonymousTemporaryFiles.Remove(aID, &callback); + MOZ_ASSERT(callback); + + PRFileDesc* prfile = nullptr; + if (aFDOrError.type() == FileDescOrError::Tnsresult) { + DebugOnly<nsresult> rv = aFDOrError.get_nsresult(); + MOZ_ASSERT(NS_FAILED(rv)); + } else { + auto rawFD = aFDOrError.get_FileDescriptor().ClonePlatformHandle(); + prfile = PR_ImportFile(PROsfd(rawFD.release())); + } + (*callback)(prfile); + return IPC_OK(); +} + +nsresult ContentChild::AsyncOpenAnonymousTemporaryFile( + const AnonymousTemporaryFileCallback& aCallback) { + MOZ_ASSERT(NS_IsMainThread()); + + static uint64_t id = 0; + auto newID = id++; + if (!SendRequestAnonymousTemporaryFile(newID)) { + return NS_ERROR_FAILURE; + } + + // Remember the association with the callback. + MOZ_ASSERT(!mPendingAnonymousTemporaryFiles.Get(newID)); + mPendingAnonymousTemporaryFiles.GetOrInsertNew(newID, aCallback); + return NS_OK; +} + +mozilla::ipc::IPCResult ContentChild::RecvSetPermissionsWithKey( + const nsCString& aPermissionKey, nsTArray<IPC::Permission>&& aPerms) { + RefPtr<PermissionManager> permManager = PermissionManager::GetInstance(); + if (permManager) { + permManager->SetPermissionsWithKey(aPermissionKey, aPerms); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvRefreshScreens( + nsTArray<ScreenDetails>&& aScreens) { + ScreenManager& screenManager = ScreenManager::GetSingleton(); + screenManager.Refresh(std::move(aScreens)); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvShareCodeCoverageMutex( + CrossProcessMutexHandle aHandle) { +#ifdef MOZ_CODE_COVERAGE + CodeCoverageHandler::Init(std::move(aHandle)); + return IPC_OK(); +#else + MOZ_CRASH("Shouldn't receive this message in non-code coverage builds!"); +#endif +} + +mozilla::ipc::IPCResult ContentChild::RecvFlushCodeCoverageCounters( + FlushCodeCoverageCountersResolver&& aResolver) { +#ifdef MOZ_CODE_COVERAGE + CodeCoverageHandler::FlushCounters(); + aResolver(/* unused */ true); + return IPC_OK(); +#else + MOZ_CRASH("Shouldn't receive this message in non-code coverage builds!"); +#endif +} + +mozilla::ipc::IPCResult ContentChild::RecvSetInputEventQueueEnabled() { + nsThreadManager::get().EnableMainThreadEventPrioritization(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvFlushInputEventQueue() { + nsThreadManager::get().FlushInputEventPrioritization(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSuspendInputEventQueue() { + nsThreadManager::get().SuspendInputEventPrioritization(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvResumeInputEventQueue() { + nsThreadManager::get().ResumeInputEventPrioritization(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvAddDynamicScalars( + nsTArray<DynamicScalarDefinition>&& aDefs) { + TelemetryIPC::AddDynamicScalarDefinitions(aDefs); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvCrossProcessRedirect( + RedirectToRealChannelArgs&& aArgs, + nsTArray<Endpoint<extensions::PStreamFilterParent>>&& aEndpoints, + CrossProcessRedirectResolver&& aResolve) { + nsCOMPtr<nsILoadInfo> loadInfo; + nsresult rv = mozilla::ipc::LoadInfoArgsToLoadInfo( + aArgs.loadInfo(), NOT_REMOTE_TYPE, getter_AddRefs(loadInfo)); + if (NS_FAILED(rv)) { + MOZ_DIAGNOSTIC_ASSERT(false, "LoadInfoArgsToLoadInfo failed"); + return IPC_OK(); + } + + nsCOMPtr<nsIChannel> newChannel; + MOZ_ASSERT((aArgs.loadStateInternalLoadFlags() & + nsDocShell::InternalLoad::INTERNAL_LOAD_FLAGS_IS_SRCDOC) || + aArgs.srcdocData().IsVoid()); + rv = nsDocShell::CreateRealChannelForDocument( + getter_AddRefs(newChannel), aArgs.uri(), loadInfo, nullptr, + aArgs.newLoadFlags(), aArgs.srcdocData(), aArgs.baseUri()); + + if (RefPtr<HttpBaseChannel> httpChannel = do_QueryObject(newChannel)) { + httpChannel->SetEarlyHints(std::move(aArgs.earlyHints())); + httpChannel->SetEarlyHintLinkType(aArgs.earlyHintLinkType()); + } + + // This is used to report any errors back to the parent by calling + // CrossProcessRedirectFinished. + RefPtr<HttpChannelChild> httpChild = do_QueryObject(newChannel); + auto resolve = [=](const nsresult& aRv) { + nsresult rv = aRv; + if (httpChild) { + rv = httpChild->CrossProcessRedirectFinished(rv); + } + aResolve(rv); + }; + auto scopeExit = MakeScopeExit([&]() { resolve(rv); }); + + if (NS_FAILED(rv)) { + return IPC_OK(); + } + + if (nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(newChannel)) { + rv = httpChannel->SetChannelId(aArgs.channelId()); + } + if (NS_FAILED(rv)) { + return IPC_OK(); + } + + rv = newChannel->SetOriginalURI(aArgs.originalURI()); + if (NS_FAILED(rv)) { + return IPC_OK(); + } + + if (nsCOMPtr<nsIHttpChannelInternal> httpChannelInternal = + do_QueryInterface(newChannel)) { + rv = httpChannelInternal->SetRedirectMode(aArgs.redirectMode()); + } + if (NS_FAILED(rv)) { + return IPC_OK(); + } + + if (aArgs.init()) { + HttpBaseChannel::ReplacementChannelConfig config(std::move(*aArgs.init())); + HttpBaseChannel::ConfigureReplacementChannel( + newChannel, config, + HttpBaseChannel::ReplacementReason::DocumentChannel); + } + + if (aArgs.contentDisposition()) { + newChannel->SetContentDisposition(*aArgs.contentDisposition()); + } + + if (aArgs.contentDispositionFilename()) { + newChannel->SetContentDispositionFilename( + *aArgs.contentDispositionFilename()); + } + + if (nsCOMPtr<nsIChildChannel> childChannel = do_QueryInterface(newChannel)) { + // Connect to the parent if this is a remote channel. If it's entirely + // handled locally, then we'll call AsyncOpen from the docshell when + // we complete the setup + rv = childChannel->ConnectParent( + aArgs.registrarId()); // creates parent channel + if (NS_FAILED(rv)) { + return IPC_OK(); + } + } + + // We need to copy the property bag before signaling that the channel + // is ready so that the nsDocShell can retrieve the history data when called. + if (nsCOMPtr<nsIWritablePropertyBag> bag = do_QueryInterface(newChannel)) { + nsHashPropertyBag::CopyFrom(bag, aArgs.properties()); + } + + RefPtr<nsDocShellLoadState> loadState; + rv = nsDocShellLoadState::CreateFromPendingChannel( + newChannel, aArgs.loadIdentifier(), aArgs.registrarId(), + getter_AddRefs(loadState)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return IPC_OK(); + } + loadState->SetLoadFlags(aArgs.loadStateExternalLoadFlags()); + loadState->SetInternalLoadFlags(aArgs.loadStateInternalLoadFlags()); + if (IsValidLoadType(aArgs.loadStateLoadType())) { + loadState->SetLoadType(aArgs.loadStateLoadType()); + } + + if (aArgs.loadingSessionHistoryInfo().isSome()) { + loadState->SetLoadingSessionHistoryInfo( + aArgs.loadingSessionHistoryInfo().ref()); + } + if (aArgs.originalUriString().isSome()) { + loadState->SetOriginalURIString(aArgs.originalUriString().ref()); + } + + RefPtr<ChildProcessChannelListener> processListener = + ChildProcessChannelListener::GetSingleton(); + // The listener will call completeRedirectSetup or asyncOpen on the channel. + processListener->OnChannelReady(loadState, aArgs.loadIdentifier(), + std::move(aEndpoints), aArgs.timing(), + std::move(resolve)); + scopeExit.release(); + + // scopeExit will call CrossProcessRedirectFinished(rv) here + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvStartDelayedAutoplayMediaComponents( + const MaybeDiscarded<BrowsingContext>& aContext) { + if (NS_WARN_IF(aContext.IsNullOrDiscarded())) { + return IPC_OK(); + } + + aContext.get()->StartDelayedAutoplayMediaComponents(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUpdateMediaControlAction( + const MaybeDiscarded<BrowsingContext>& aContext, + const MediaControlAction& aAction) { + if (NS_WARN_IF(aContext.IsNullOrDiscarded())) { + return IPC_OK(); + } + + ContentMediaControlKeyHandler::HandleMediaControlAction(aContext.get(), + aAction); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvOnAllowAccessFor( + const MaybeDiscarded<BrowsingContext>& aContext, + const nsCString& aTrackingOrigin, uint32_t aCookieBehavior, + const ContentBlockingNotifier::StorageAccessPermissionGrantedReason& + aReason) { + MOZ_ASSERT(!aContext.IsNull(), "Browsing context cannot be null"); + + StorageAccessAPIHelper::OnAllowAccessFor( + aContext.GetMaybeDiscarded(), aTrackingOrigin, aCookieBehavior, aReason); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvOnContentBlockingDecision( + const MaybeDiscarded<BrowsingContext>& aContext, + const ContentBlockingNotifier::BlockingDecision& aDecision, + uint32_t aRejectedReason) { + MOZ_ASSERT(!aContext.IsNull(), "Browsing context cannot be null"); + + nsCOMPtr<nsPIDOMWindowOuter> outer = aContext.get()->GetDOMWindow(); + if (!outer) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a outer " + "window")); + return IPC_OK(); + } + + nsCOMPtr<nsPIDOMWindowInner> inner = outer->GetCurrentInnerWindow(); + if (!inner) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a inner " + "window")); + return IPC_OK(); + } + + ContentBlockingNotifier::OnDecision(inner, aDecision, aRejectedReason); + return IPC_OK(); +} + +#ifdef NIGHTLY_BUILD +void ContentChild::OnChannelReceivedMessage(const Message& aMsg) { + if (nsContentUtils::IsMessageInputEvent(aMsg)) { + mPendingInputEvents++; + } +} + +PContentChild::Result ContentChild::OnMessageReceived(const Message& aMsg) { + if (nsContentUtils::IsMessageInputEvent(aMsg)) { + DebugOnly<uint32_t> prevEvts = mPendingInputEvents--; + MOZ_ASSERT(prevEvts > 0); + } + + return PContentChild::OnMessageReceived(aMsg); +} + +PContentChild::Result ContentChild::OnMessageReceived( + const Message& aMsg, UniquePtr<Message>& aReply) { + return PContentChild::OnMessageReceived(aMsg, aReply); +} +#endif + +mozilla::ipc::IPCResult ContentChild::RecvCreateBrowsingContext( + uint64_t aGroupId, BrowsingContext::IPCInitializer&& aInit) { + // We can't already have a BrowsingContext with this ID. + if (RefPtr<BrowsingContext> existing = BrowsingContext::Get(aInit.mId)) { + return IPC_FAIL(this, "Browsing context already exists"); + } + + RefPtr<WindowContext> parent = WindowContext::GetById(aInit.mParentId); + if (!parent && aInit.mParentId != 0) { + // Handle this case by ignoring the request, as parent must be in the + // process of being discarded. + // In the future it would be nice to avoid sending this message to the child + // at all. + NS_WARNING("Attempt to attach BrowsingContext to discarded parent"); + return IPC_OK(); + } + + RefPtr<BrowsingContextGroup> group = + BrowsingContextGroup::GetOrCreate(aGroupId); + return BrowsingContext::CreateFromIPC(std::move(aInit), group, nullptr); +} + +mozilla::ipc::IPCResult ContentChild::RecvDiscardBrowsingContext( + const MaybeDiscarded<BrowsingContext>& aContext, bool aDoDiscard, + DiscardBrowsingContextResolver&& aResolve) { + if (BrowsingContext* context = aContext.GetMaybeDiscarded()) { + if (aDoDiscard && !context->IsDiscarded()) { + context->Detach(/* aFromIPC */ true); + } + context->AddDiscardListener(aResolve); + return IPC_OK(); + } + + // Immediately resolve the promise, as we've received the message. This will + // allow the parent process to discard references to this BC. + aResolve(true); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvRegisterBrowsingContextGroup( + uint64_t aGroupId, nsTArray<SyncedContextInitializer>&& aInits) { + RefPtr<BrowsingContextGroup> group = + BrowsingContextGroup::GetOrCreate(aGroupId); + + // Each of the initializers in aInits is sorted in pre-order, so our parent + // should always be available before the element itself. + for (auto& initUnion : aInits) { + switch (initUnion.type()) { + case SyncedContextInitializer::TBrowsingContextInitializer: { + auto& init = initUnion.get_BrowsingContextInitializer(); +#ifdef DEBUG + RefPtr<BrowsingContext> existing = BrowsingContext::Get(init.mId); + MOZ_ASSERT(!existing, "BrowsingContext must not exist yet!"); + + RefPtr<WindowContext> parent = init.GetParent(); + MOZ_ASSERT_IF(parent, parent->Group() == group); +#endif + + BrowsingContext::CreateFromIPC(std::move(init), group, nullptr); + break; + } + case SyncedContextInitializer::TWindowContextInitializer: { + auto& init = initUnion.get_WindowContextInitializer(); +#ifdef DEBUG + RefPtr<WindowContext> existing = + WindowContext::GetById(init.mInnerWindowId); + MOZ_ASSERT(!existing, "WindowContext must not exist yet!"); + RefPtr<BrowsingContext> parent = + BrowsingContext::Get(init.mBrowsingContextId); + MOZ_ASSERT(parent && parent->Group() == group); +#endif + + WindowContext::CreateFromIPC(std::move(init)); + break; + }; + default: + MOZ_ASSERT_UNREACHABLE(); + } + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvDestroyBrowsingContextGroup( + uint64_t aGroupId) { + if (RefPtr<BrowsingContextGroup> group = + BrowsingContextGroup::GetExisting(aGroupId)) { + group->ChildDestroy(); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvWindowClose( + const MaybeDiscarded<BrowsingContext>& aContext, bool aTrustedCaller) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsCOMPtr<nsPIDOMWindowOuter> window = aContext.get()->GetDOMWindow(); + if (!window) { + MOZ_LOG( + BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a window")); + return IPC_OK(); + } + + // Call `GetDocument()` to force the document and its inner window to be + // created, as it would be forced to be created if this call was being + // performed in-process. + if (NS_WARN_IF(!aContext.get()->GetDocument())) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context but document " + "creation failed")); + return IPC_OK(); + } + + nsGlobalWindowOuter::Cast(window)->CloseOuter(aTrustedCaller); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvWindowFocus( + const MaybeDiscarded<BrowsingContext>& aContext, CallerType aCallerType, + uint64_t aActionId) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsCOMPtr<nsPIDOMWindowOuter> window = aContext.get()->GetDOMWindow(); + if (!window) { + MOZ_LOG( + BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a window")); + return IPC_OK(); + } + + // Call `GetDocument()` to force the document and its inner window to be + // created, as it would be forced to be created if this call was being + // performed in-process. + if (NS_WARN_IF(!aContext.get()->GetDocument())) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context but document " + "creation failed")); + return IPC_OK(); + } + + nsGlobalWindowOuter::Cast(window)->FocusOuter( + aCallerType, /* aFromOtherProcess */ true, aActionId); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvWindowBlur( + const MaybeDiscarded<BrowsingContext>& aContext, CallerType aCallerType) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsCOMPtr<nsPIDOMWindowOuter> window = aContext.get()->GetDOMWindow(); + if (!window) { + MOZ_LOG( + BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a window")); + return IPC_OK(); + } + + // Call `GetDocument()` to force the document and its inner window to be + // created, as it would be forced to be created if this call was being + // performed in-process. + if (NS_WARN_IF(!aContext.get()->GetDocument())) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context but document " + "creation failed")); + return IPC_OK(); + } + + nsGlobalWindowOuter::Cast(window)->BlurOuter(aCallerType); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvRaiseWindow( + const MaybeDiscarded<BrowsingContext>& aContext, CallerType aCallerType, + uint64_t aActionId) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsCOMPtr<nsPIDOMWindowOuter> window = aContext.get()->GetDOMWindow(); + if (!window) { + MOZ_LOG( + BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a window")); + return IPC_OK(); + } + + if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) { + fm->RaiseWindow(window, aCallerType, aActionId); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvAdjustWindowFocus( + const MaybeDiscarded<BrowsingContext>& aContext, bool aIsVisible, + uint64_t aActionId) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) { + RefPtr<BrowsingContext> bc = aContext.get(); + fm->AdjustInProcessWindowFocus(bc, false, aIsVisible, aActionId); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvClearFocus( + const MaybeDiscarded<BrowsingContext>& aContext) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsCOMPtr<nsPIDOMWindowOuter> window = aContext.get()->GetDOMWindow(); + if (!window) { + MOZ_LOG( + BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a window")); + return IPC_OK(); + } + + if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) { + fm->ClearFocus(window); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSetFocusedBrowsingContext( + const MaybeDiscarded<BrowsingContext>& aContext, uint64_t aActionId) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsFocusManager* fm = nsFocusManager::GetFocusManager(); + if (fm) { + fm->SetFocusedBrowsingContextFromOtherProcess(aContext.get(), aActionId); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSetActiveBrowsingContext( + const MaybeDiscarded<BrowsingContext>& aContext, uint64_t aActionId) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsFocusManager* fm = nsFocusManager::GetFocusManager(); + if (fm) { + fm->SetActiveBrowsingContextFromOtherProcess(aContext.get(), aActionId); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvAbortOrientationPendingPromises( + const MaybeDiscarded<BrowsingContext>& aContext) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + dom::ScreenOrientation::AbortInProcessOrientationPromises(aContext.get()); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvUnsetActiveBrowsingContext( + const MaybeDiscarded<BrowsingContext>& aContext, uint64_t aActionId) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsFocusManager* fm = nsFocusManager::GetFocusManager(); + if (fm) { + fm->UnsetActiveBrowsingContextFromOtherProcess(aContext.get(), aActionId); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSetFocusedElement( + const MaybeDiscarded<BrowsingContext>& aContext, bool aNeedsFocus) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsCOMPtr<nsPIDOMWindowOuter> window = aContext.get()->GetDOMWindow(); + if (!window) { + MOZ_LOG( + BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a window")); + return IPC_OK(); + } + + window->SetFocusedElement(nullptr, 0, aNeedsFocus); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvFinalizeFocusOuter( + const MaybeDiscarded<BrowsingContext>& aContext, bool aCanFocus, + CallerType aCallerType) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + if (Element* frame = aContext.get()->GetEmbedderElement()) { + nsContentUtils::RequestFrameFocus(*frame, aCanFocus, aCallerType); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvBlurToChild( + const MaybeDiscarded<BrowsingContext>& aFocusedBrowsingContext, + const MaybeDiscarded<BrowsingContext>& aBrowsingContextToClear, + const MaybeDiscarded<BrowsingContext>& aAncestorBrowsingContextToFocus, + bool aIsLeavingDocument, bool aAdjustWidget, uint64_t aActionId) { + if (aFocusedBrowsingContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager(); + if (MOZ_UNLIKELY(!fm)) { + return IPC_OK(); + } + + RefPtr<BrowsingContext> toClear = aBrowsingContextToClear.IsDiscarded() + ? nullptr + : aBrowsingContextToClear.get(); + RefPtr<BrowsingContext> toFocus = + aAncestorBrowsingContextToFocus.IsDiscarded() + ? nullptr + : aAncestorBrowsingContextToFocus.get(); + + RefPtr<BrowsingContext> focusedBrowsingContext = + aFocusedBrowsingContext.get(); + + fm->BlurFromOtherProcess(focusedBrowsingContext, toClear, toFocus, + aIsLeavingDocument, aAdjustWidget, aActionId); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvSetupFocusedAndActive( + const MaybeDiscarded<BrowsingContext>& aFocusedBrowsingContext, + uint64_t aActionIdForFocused, + const MaybeDiscarded<BrowsingContext>& aActiveBrowsingContext, + uint64_t aActionIdForActive) { + nsFocusManager* fm = nsFocusManager::GetFocusManager(); + if (fm) { + if (!aActiveBrowsingContext.IsNullOrDiscarded()) { + fm->SetActiveBrowsingContextFromOtherProcess(aActiveBrowsingContext.get(), + aActionIdForActive); + } + if (!aFocusedBrowsingContext.IsNullOrDiscarded()) { + fm->SetFocusedBrowsingContextFromOtherProcess( + aFocusedBrowsingContext.get(), aActionIdForFocused); + } + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvReviseActiveBrowsingContext( + uint64_t aOldActionId, + const MaybeDiscarded<BrowsingContext>& aActiveBrowsingContext, + uint64_t aNewActionId) { + nsFocusManager* fm = nsFocusManager::GetFocusManager(); + if (fm && !aActiveBrowsingContext.IsNullOrDiscarded()) { + fm->ReviseActiveBrowsingContext(aOldActionId, aActiveBrowsingContext.get(), + aNewActionId); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvReviseFocusedBrowsingContext( + uint64_t aOldActionId, + const MaybeDiscarded<BrowsingContext>& aFocusedBrowsingContext, + uint64_t aNewActionId) { + nsFocusManager* fm = nsFocusManager::GetFocusManager(); + if (fm && !aFocusedBrowsingContext.IsNullOrDiscarded()) { + fm->ReviseFocusedBrowsingContext( + aOldActionId, aFocusedBrowsingContext.get(), aNewActionId); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvMaybeExitFullscreen( + const MaybeDiscarded<BrowsingContext>& aContext) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + nsIDocShell* shell = aContext.get()->GetDocShell(); + if (!shell) { + return IPC_OK(); + } + + Document* doc = shell->GetDocument(); + if (doc && doc->GetFullscreenElement()) { + Document::AsyncExitFullscreen(doc); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvWindowPostMessage( + const MaybeDiscarded<BrowsingContext>& aContext, + const ClonedOrErrorMessageData& aMessage, const PostMessageData& aData) { + if (aContext.IsNullOrDiscarded()) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to dead or detached context")); + return IPC_OK(); + } + + RefPtr<nsGlobalWindowOuter> window = + nsGlobalWindowOuter::Cast(aContext.get()->GetDOMWindow()); + if (!window) { + MOZ_LOG( + BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context without a window")); + return IPC_OK(); + } + + nsCOMPtr<nsIPrincipal> providedPrincipal; + if (!window->GetPrincipalForPostMessage( + aData.targetOrigin(), aData.targetOriginURI(), + aData.callerPrincipal(), *aData.subjectPrincipal(), + getter_AddRefs(providedPrincipal))) { + return IPC_OK(); + } + + // Call `GetDocument()` to force the document and its inner window to be + // created, as it would be forced to be created if this call was being + // performed in-process. + if (NS_WARN_IF(!aContext.get()->GetDocument())) { + MOZ_LOG(BrowsingContext::GetLog(), LogLevel::Debug, + ("ChildIPC: Trying to send a message to a context but document " + "creation failed")); + return IPC_OK(); + } + + // It's OK if `sourceBc` has already been discarded, so long as we can + // continue to wrap it. + RefPtr<BrowsingContext> sourceBc = aData.source().GetMaybeDiscarded(); + + // Create and asynchronously dispatch a runnable which will handle actual DOM + // event creation and dispatch. + RefPtr<PostMessageEvent> event = + new PostMessageEvent(sourceBc, aData.origin(), window, providedPrincipal, + aData.innerWindowId(), aData.callerURI(), + aData.scriptLocation(), aData.isFromPrivateWindow()); + event->UnpackFrom(aMessage); + + event->DispatchToTargetThread(IgnoredErrorResult()); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvCommitBrowsingContextTransaction( + const MaybeDiscarded<BrowsingContext>& aContext, + BrowsingContext::BaseTransaction&& aTransaction, uint64_t aEpoch) { + return aTransaction.CommitFromIPC(aContext, aEpoch, this); +} + +mozilla::ipc::IPCResult ContentChild::RecvCommitWindowContextTransaction( + const MaybeDiscarded<WindowContext>& aContext, + WindowContext::BaseTransaction&& aTransaction, uint64_t aEpoch) { + return aTransaction.CommitFromIPC(aContext, aEpoch, this); +} + +mozilla::ipc::IPCResult ContentChild::RecvCreateWindowContext( + WindowContext::IPCInitializer&& aInit) { + RefPtr<BrowsingContext> bc = BrowsingContext::Get(aInit.mBrowsingContextId); + if (!bc) { + // Handle this case by ignoring the request, as bc must be in the process of + // being discarded. + // In the future it would be nice to avoid sending this message to the child + // at all. + NS_WARNING("Attempt to attach WindowContext to discarded parent"); + return IPC_OK(); + } + + WindowContext::CreateFromIPC(std::move(aInit)); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvDiscardWindowContext( + uint64_t aContextId, DiscardWindowContextResolver&& aResolve) { + // Resolve immediately to acknowledge call + aResolve(true); + + RefPtr<WindowContext> window = WindowContext::GetById(aContextId); + if (NS_WARN_IF(!window) || NS_WARN_IF(window->IsDiscarded())) { + return IPC_OK(); + } + + window->Discard(); + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvScriptError( + const nsString& aMessage, const nsString& aSourceName, + const nsString& aSourceLine, const uint32_t& aLineNumber, + const uint32_t& aColNumber, const uint32_t& aFlags, + const nsCString& aCategory, const bool& aFromPrivateWindow, + const uint64_t& aInnerWindowId, const bool& aFromChromeContext) { + nsresult rv = NS_OK; + nsCOMPtr<nsIConsoleService> consoleService = + do_GetService(NS_CONSOLESERVICE_CONTRACTID, &rv); + NS_ENSURE_SUCCESS(rv, IPC_FAIL(this, "Failed to get console service")); + + nsCOMPtr<nsIScriptError> scriptError( + do_CreateInstance(NS_SCRIPTERROR_CONTRACTID)); + NS_ENSURE_TRUE(scriptError, + IPC_FAIL(this, "Failed to construct nsIScriptError")); + + scriptError->InitWithWindowID(aMessage, aSourceName, aSourceLine, aLineNumber, + aColNumber, aFlags, aCategory, aInnerWindowId, + aFromChromeContext); + rv = consoleService->LogMessage(scriptError); + NS_ENSURE_SUCCESS(rv, IPC_FAIL(this, "Failed to log script error")); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvReportFrameTimingData( + const LoadInfoArgs& loadInfoArgs, const nsString& entryName, + const nsString& initiatorType, UniquePtr<PerformanceTimingData>&& aData) { + if (!aData) { + return IPC_FAIL(this, "aData should not be null"); + } + + nsCOMPtr<nsILoadInfo> loadInfo; + nsresult rv = mozilla::ipc::LoadInfoArgsToLoadInfo( + loadInfoArgs, NOT_REMOTE_TYPE, getter_AddRefs(loadInfo)); + if (NS_FAILED(rv)) { + MOZ_DIAGNOSTIC_ASSERT(false, "LoadInfoArgsToLoadInfo failed"); + return IPC_OK(); + } + + // It is important to call LoadInfo::GetPerformanceStorage instead of simply + // getting the performance object via the innerWindowID in order to perform + // necessary cross origin checks. + if (PerformanceStorage* storage = loadInfo->GetPerformanceStorage()) { + storage->AddEntry(entryName, initiatorType, std::move(aData)); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvLoadURI( + const MaybeDiscarded<BrowsingContext>& aContext, + nsDocShellLoadState* aLoadState, bool aSetNavigating, + LoadURIResolver&& aResolve) { + auto resolveOnExit = MakeScopeExit([&] { aResolve(true); }); + + if (aContext.IsNullOrDiscarded()) { + return IPC_OK(); + } + RefPtr<BrowsingContext> context = aContext.get(); + if (!context->IsInProcess()) { + // The DocShell has been torn down or the BrowsingContext has changed + // process in the middle of the load request. There's not much we can do at + // this point, so just give up. + return IPC_OK(); + } + + context->LoadURI(aLoadState, aSetNavigating); + + nsCOMPtr<nsPIDOMWindowOuter> window = context->GetDOMWindow(); + BrowserChild* bc = BrowserChild::GetFrom(window); + if (bc) { + bc->NotifyNavigationFinished(); + } + +#ifdef MOZ_CRASHREPORTER + if (CrashReporter::GetEnabled()) { + nsCOMPtr<nsIURI> annotationURI; + + nsresult rv = NS_MutateURI(aLoadState->URI()) + .SetUserPass(""_ns) + .Finalize(annotationURI); + + if (NS_FAILED(rv)) { + // Ignore failures on about: URIs. + annotationURI = aLoadState->URI(); + } + + CrashReporter::AnnotateCrashReport(CrashReporter::Annotation::URL, + annotationURI->GetSpecOrDefault()); + } +#endif + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvInternalLoad( + nsDocShellLoadState* aLoadState) { + if (!aLoadState->Target().IsEmpty() || + aLoadState->TargetBrowsingContext().IsNull()) { + return IPC_FAIL(this, "must already be retargeted"); + } + if (aLoadState->TargetBrowsingContext().IsDiscarded()) { + return IPC_OK(); + } + RefPtr<BrowsingContext> context = aLoadState->TargetBrowsingContext().get(); + + context->InternalLoad(aLoadState); + +#ifdef MOZ_CRASHREPORTER + if (CrashReporter::GetEnabled()) { + nsCOMPtr<nsIURI> annotationURI; + + nsresult rv = NS_MutateURI(aLoadState->URI()) + .SetUserPass(""_ns) + .Finalize(annotationURI); + + if (NS_FAILED(rv)) { + // Ignore failures on about: URIs. + annotationURI = aLoadState->URI(); + } + + CrashReporter::AnnotateCrashReport(CrashReporter::Annotation::URL, + annotationURI->GetSpecOrDefault()); + } +#endif + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvDisplayLoadError( + const MaybeDiscarded<BrowsingContext>& aContext, const nsAString& aURI) { + if (aContext.IsNullOrDiscarded()) { + return IPC_OK(); + } + RefPtr<BrowsingContext> context = aContext.get(); + + context->DisplayLoadError(aURI); + + nsCOMPtr<nsPIDOMWindowOuter> window = context->GetDOMWindow(); + BrowserChild* bc = BrowserChild::GetFrom(window); + if (bc) { + bc->NotifyNavigationFinished(); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvHistoryCommitIndexAndLength( + const MaybeDiscarded<BrowsingContext>& aContext, const uint32_t& aIndex, + const uint32_t& aLength, const nsID& aChangeID) { + if (!aContext.IsNullOrDiscarded()) { + ChildSHistory* shistory = aContext.get()->GetChildSessionHistory(); + if (shistory) { + shistory->SetIndexAndLength(aIndex, aLength, aChangeID); + } + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvGetLayoutHistoryState( + const MaybeDiscarded<BrowsingContext>& aContext, + GetLayoutHistoryStateResolver&& aResolver) { + nsCOMPtr<nsILayoutHistoryState> state; + nsIDocShell* docShell; + mozilla::Maybe<mozilla::dom::Wireframe> wireframe; + if (!aContext.IsNullOrDiscarded() && + (docShell = aContext.get()->GetDocShell())) { + docShell->PersistLayoutHistoryState(); + docShell->GetLayoutHistoryState(getter_AddRefs(state)); + wireframe = static_cast<nsDocShell*>(docShell)->GetWireframe(); + } + aResolver( + std::tuple<nsILayoutHistoryState*, const mozilla::Maybe<Wireframe>&>( + state, wireframe)); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvDispatchLocationChangeEvent( + const MaybeDiscarded<BrowsingContext>& aContext) { + if (!aContext.IsNullOrDiscarded() && aContext.get()->GetDocShell()) { + aContext.get()->GetDocShell()->DispatchLocationChangeEvent(); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvDispatchBeforeUnloadToSubtree( + const MaybeDiscarded<BrowsingContext>& aStartingAt, + DispatchBeforeUnloadToSubtreeResolver&& aResolver) { + if (aStartingAt.IsNullOrDiscarded()) { + aResolver(nsIDocumentViewer::eAllowNavigation); + } else { + DispatchBeforeUnloadToSubtree(aStartingAt.get(), std::move(aResolver)); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvDecoderSupportedMimeTypes( + nsTArray<nsCString>&& aSupportedTypes) { +#ifdef MOZ_WIDGET_ANDROID + AndroidDecoderModule::SetSupportedMimeTypes(std::move(aSupportedTypes)); +#endif + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvInitNextGenLocalStorageEnabled( + const bool& aEnabled) { + mozilla::dom::RecvInitNextGenLocalStorageEnabled(aEnabled); + + return IPC_OK(); +} + +/* static */ void ContentChild::DispatchBeforeUnloadToSubtree( + BrowsingContext* aStartingAt, + const DispatchBeforeUnloadToSubtreeResolver& aResolver) { + bool resolved = false; + + aStartingAt->PreOrderWalk([&](dom::BrowsingContext* aBC) { + if (aBC->GetDocShell()) { + nsCOMPtr<nsIDocumentViewer> viewer; + aBC->GetDocShell()->GetDocViewer(getter_AddRefs(viewer)); + if (viewer && + viewer->DispatchBeforeUnload() == + nsIDocumentViewer::eRequestBlockNavigation && + !resolved) { + // Send our response as soon as we find any blocker, so that we can show + // the permit unload prompt as soon as possible, without giving + // subsequent handlers a chance to delay it. + aResolver(nsIDocumentViewer::eRequestBlockNavigation); + resolved = true; + } + } + }); + + if (!resolved) { + aResolver(nsIDocumentViewer::eAllowNavigation); + } +} + +mozilla::ipc::IPCResult ContentChild::RecvGoBack( + const MaybeDiscarded<BrowsingContext>& aContext, + const Maybe<int32_t>& aCancelContentJSEpoch, bool aRequireUserInteraction, + bool aUserActivation) { + if (aContext.IsNullOrDiscarded()) { + return IPC_OK(); + } + BrowsingContext* bc = aContext.get(); + + if (RefPtr<nsDocShell> docShell = nsDocShell::Cast(bc->GetDocShell())) { + if (aCancelContentJSEpoch) { + docShell->SetCancelContentJSEpoch(*aCancelContentJSEpoch); + } + docShell->GoBack(aRequireUserInteraction, aUserActivation); + + if (BrowserChild* browserChild = BrowserChild::GetFrom(docShell)) { + browserChild->NotifyNavigationFinished(); + } + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvGoForward( + const MaybeDiscarded<BrowsingContext>& aContext, + const Maybe<int32_t>& aCancelContentJSEpoch, bool aRequireUserInteraction, + bool aUserActivation) { + if (aContext.IsNullOrDiscarded()) { + return IPC_OK(); + } + BrowsingContext* bc = aContext.get(); + + if (RefPtr<nsDocShell> docShell = nsDocShell::Cast(bc->GetDocShell())) { + if (aCancelContentJSEpoch) { + docShell->SetCancelContentJSEpoch(*aCancelContentJSEpoch); + } + docShell->GoForward(aRequireUserInteraction, aUserActivation); + + if (BrowserChild* browserChild = BrowserChild::GetFrom(docShell)) { + browserChild->NotifyNavigationFinished(); + } + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvGoToIndex( + const MaybeDiscarded<BrowsingContext>& aContext, const int32_t& aIndex, + const Maybe<int32_t>& aCancelContentJSEpoch, bool aUserActivation) { + if (aContext.IsNullOrDiscarded()) { + return IPC_OK(); + } + BrowsingContext* bc = aContext.get(); + + if (RefPtr<nsDocShell> docShell = nsDocShell::Cast(bc->GetDocShell())) { + if (aCancelContentJSEpoch) { + docShell->SetCancelContentJSEpoch(*aCancelContentJSEpoch); + } + docShell->GotoIndex(aIndex, aUserActivation); + + if (BrowserChild* browserChild = BrowserChild::GetFrom(docShell)) { + browserChild->NotifyNavigationFinished(); + } + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvReload( + const MaybeDiscarded<BrowsingContext>& aContext, + const uint32_t aReloadFlags) { + if (aContext.IsNullOrDiscarded()) { + return IPC_OK(); + } + BrowsingContext* bc = aContext.get(); + + if (RefPtr<nsDocShell> docShell = nsDocShell::Cast(bc->GetDocShell())) { + docShell->Reload(aReloadFlags); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult ContentChild::RecvStopLoad( + const MaybeDiscarded<BrowsingContext>& aContext, + const uint32_t aStopFlags) { + if (aContext.IsNullOrDiscarded()) { + return IPC_OK(); + } + BrowsingContext* bc = aContext.get(); + + if (auto* docShell = nsDocShell::Cast(bc->GetDocShell())) { + docShell->Stop(aStopFlags); + } + + return IPC_OK(); +} + +#if defined(MOZ_SANDBOX) && defined(MOZ_DEBUG) && defined(ENABLE_TESTS) +mozilla::ipc::IPCResult ContentChild::RecvInitSandboxTesting( + Endpoint<PSandboxTestingChild>&& aEndpoint) { + if (!SandboxTestingChild::Initialize(std::move(aEndpoint))) { + return IPC_FAIL( + this, "InitSandboxTesting failed to initialise the child process."); + } + return IPC_OK(); +} +#endif + +NS_IMETHODIMP ContentChild::GetChildID(uint64_t* aOut) { + *aOut = mID; + return NS_OK; +} + +NS_IMETHODIMP ContentChild::GetActor(const nsACString& aName, JSContext* aCx, + JSProcessActorChild** retval) { + ErrorResult error; + RefPtr<JSProcessActorChild> actor = + JSActorManager::GetActor(aCx, aName, error) + .downcast<JSProcessActorChild>(); + if (error.MaybeSetPendingException(aCx)) { + return NS_ERROR_FAILURE; + } + actor.forget(retval); + return NS_OK; +} + +NS_IMETHODIMP ContentChild::GetExistingActor(const nsACString& aName, + JSProcessActorChild** retval) { + RefPtr<JSProcessActorChild> actor = + JSActorManager::GetExistingActor(aName).downcast<JSProcessActorChild>(); + actor.forget(retval); + return NS_OK; +} + +already_AddRefed<JSActor> ContentChild::InitJSActor( + JS::Handle<JSObject*> aMaybeActor, const nsACString& aName, + ErrorResult& aRv) { + RefPtr<JSProcessActorChild> actor; + if (aMaybeActor.get()) { + aRv = UNWRAP_OBJECT(JSProcessActorChild, aMaybeActor.get(), actor); + if (aRv.Failed()) { + return nullptr; + } + } else { + actor = new JSProcessActorChild(); + } + + MOZ_RELEASE_ASSERT(!actor->Manager(), + "mManager was already initialized once!"); + actor->Init(aName, this); + return actor.forget(); +} + +IPCResult ContentChild::RecvRawMessage(const JSActorMessageMeta& aMeta, + const Maybe<ClonedMessageData>& aData, + const Maybe<ClonedMessageData>& aStack) { + Maybe<StructuredCloneData> data; + if (aData) { + data.emplace(); + data->BorrowFromClonedMessageData(*aData); + } + Maybe<StructuredCloneData> stack; + if (aStack) { + stack.emplace(); + stack->BorrowFromClonedMessageData(*aStack); + } + ReceiveRawMessage(aMeta, std::move(data), std::move(stack)); + return IPC_OK(); +} + +NS_IMETHODIMP ContentChild::GetCanSend(bool* aCanSend) { + *aCanSend = CanSend(); + return NS_OK; +} + +ContentChild* ContentChild::AsContentChild() { return this; } + +JSActorManager* ContentChild::AsJSActorManager() { return this; } + +IPCResult ContentChild::RecvFlushFOGData(FlushFOGDataResolver&& aResolver) { + glean::FlushFOGData(std::move(aResolver)); + return IPC_OK(); +} + +IPCResult ContentChild::RecvUpdateMediaCodecsSupported( + RemoteDecodeIn aLocation, const media::MediaCodecsSupported& aSupported) { + RemoteDecoderManagerChild::SetSupported(aLocation, aSupported); + + return IPC_OK(); +} + +void ContentChild::ConfigureThreadPerformanceHints( + const hal::ProcessPriority& aPriority) { + if (aPriority >= hal::PROCESS_PRIORITY_FOREGROUND) { + static bool canUsePerformanceHintSession = true; + if (!mPerformanceHintSession && canUsePerformanceHintSession) { + nsTArray<PlatformThreadHandle> threads; + Servo_ThreadPool_GetThreadHandles(&threads); +#ifdef XP_WIN + threads.AppendElement(GetCurrentThread()); +#else + threads.AppendElement(pthread_self()); +#endif + + mPerformanceHintSession = hal::CreatePerformanceHintSession( + threads, GetPerformanceHintTarget(TimeDuration::FromMilliseconds( + nsRefreshDriver::DefaultInterval()))); + + // Avoid repeatedly attempting to create a session if it is not + // supported. + canUsePerformanceHintSession = mPerformanceHintSession != nullptr; + } + +#ifdef MOZ_WIDGET_ANDROID + // On Android if we are unable to use PerformanceHintManager then fall back + // to setting the stylo threads' affinities to the performant cores. Android + // automatically sets each thread's affinity to all cores when a process is + // foregrounded, and to a subset of cores when the process is backgrounded. + // We must therefore override this each time the process is foregrounded, + // but we don't have to do anything when backgrounded. + if (!mPerformanceHintSession) { + if (const auto& cpuInfo = hal::GetHeterogeneousCpuInfo()) { + // If CPUs are homogeneous there is no point setting affinity. + if (cpuInfo->mBigCpus.Count() != cpuInfo->mTotalNumCpus) { + BitSet<hal::HeterogeneousCpuInfo::MAX_CPUS> cpus = cpuInfo->mBigCpus; + if (cpus.Count() < 2) { + // From testing on a variety of devices it appears using only the + // big cores gives best performance when there are 2 or more big + // cores. If there are fewer than 2 big cores then additionally + // using the medium cores performs better. + cpus |= cpuInfo->mMediumCpus; + } + + static_assert( + hal::HeterogeneousCpuInfo::MAX_CPUS <= CPU_SETSIZE, + "HeterogeneousCpuInfo::MAX_CPUS is too large for CPU_SETSIZE"); + + cpu_set_t cpuset; + CPU_ZERO(&cpuset); + for (size_t i = 0; i < cpuInfo->mTotalNumCpus; i++) { + if (cpus.Test(i)) { + CPU_SET(i, &cpuset); + } + } + + // Only set the affinity for the stylo threads, not the main thread. + // Testing showed no difference in performance between the two + // options, and as newly spawned threads automatically inherit their + // parent's affinity mask there may be unintended consequences to + // setting the main thread affinity. + nsTArray<PlatformThreadHandle> threads; + Servo_ThreadPool_GetThreadHandles(&threads); + for (pthread_t thread : threads) { + int ret = sched_setaffinity(pthread_gettid_np(thread), + sizeof(cpu_set_t), &cpuset); + // Occasionally sched_setaffinity fails, presumably due to a race + // between us receiving the process foreground signal and whatever + // is responsible for restricting which processes can use certain + // cores. Trying again in a runnable seems to do the trick, but if + // that still fails it's not the end of the world. + if (ret < 0) { + NS_DispatchToCurrentThread(NS_NewRunnableFunction( + "ContentChild::ConfigureThreadPerformanceHints", + [threads = std::move(threads), cpuset] { + for (pthread_t thread : threads) { + sched_setaffinity(pthread_gettid_np(thread), + sizeof(cpu_set_t), &cpuset); + } + })); + break; + } + } + } + } + } +#endif + } else { + mPerformanceHintSession = nullptr; + } +} + +} // namespace dom + +#if defined(__OpenBSD__) && defined(MOZ_SANDBOX) + +static LazyLogModule sPledgeLog("OpenBSDSandbox"); + +NS_IMETHODIMP +OpenBSDFindPledgeUnveilFilePath(const char* file, nsACString& result) { + struct stat st; + + // Allow overriding files in /etc/$MOZ_APP_NAME + result.Assign(nsPrintfCString("/etc/%s/%s", MOZ_APP_NAME, file)); + if (stat(PromiseFlatCString(result).get(), &st) == 0) { + return NS_OK; + } + + // Or look in the system default directory + result.Assign(nsPrintfCString( + "/usr/local/lib/%s/browser/defaults/preferences/%s", MOZ_APP_NAME, file)); + if (stat(PromiseFlatCString(result).get(), &st) == 0) { + return NS_OK; + } + + errx(1, "can't locate %s", file); +} + +NS_IMETHODIMP +OpenBSDPledgePromises(const nsACString& aPath) { + // Using NS_LOCAL_FILE_CONTRACTID/NS_LOCALFILEINPUTSTREAM_CONTRACTID requires + // a lot of setup before they are supported and we want to pledge early on + // before all of that, so read the file directly + std::ifstream input(PromiseFlatCString(aPath).get()); + + // Build up one line of pledge promises without comments + nsAutoCString promises; + bool disabled = false; + int linenum = 0; + for (std::string tLine; std::getline(input, tLine);) { + nsAutoCString line(tLine.c_str()); + linenum++; + + // Cut off any comments at the end of the line, also catches lines + // that are entirely a comment + int32_t hash = line.FindChar('#'); + if (hash >= 0) { + line = Substring(line, 0, hash); + } + line.CompressWhitespace(true, true); + if (line.IsEmpty()) { + continue; + } + + if (linenum == 1 && line.EqualsLiteral("disable")) { + disabled = true; + break; + } + + if (!promises.IsEmpty()) { + promises.Append(" "); + } + promises.Append(line); + } + input.close(); + + if (disabled) { + warnx("%s: disabled", PromiseFlatCString(aPath).get()); + } else { + MOZ_LOG( + sPledgeLog, LogLevel::Debug, + ("%s: pledge(%s)\n", PromiseFlatCString(aPath).get(), promises.get())); + if (pledge(promises.get(), nullptr) != 0) { + err(1, "%s: pledge(%s) failed", PromiseFlatCString(aPath).get(), + promises.get()); + } + } + + return NS_OK; +} + +void ExpandUnveilPath(nsAutoCString& path) { + // Expand $XDG_RUNTIME_DIR to the environment variable, or ~/.cache + nsCString xdgRuntimeDir(PR_GetEnv("XDG_RUNTIME_DIR")); + if (xdgRuntimeDir.IsEmpty()) { + xdgRuntimeDir = "~/.cache"; + } + path.ReplaceSubstring("$XDG_RUNTIME_DIR", xdgRuntimeDir.get()); + + // Expand $XDG_CONFIG_HOME to the environment variable, or ~/.config + nsCString xdgConfigHome(PR_GetEnv("XDG_CONFIG_HOME")); + if (xdgConfigHome.IsEmpty()) { + xdgConfigHome = "~/.config"; + } + path.ReplaceSubstring("$XDG_CONFIG_HOME", xdgConfigHome.get()); + + // Expand $XDG_CACHE_HOME to the environment variable, or ~/.cache + nsCString xdgCacheHome(PR_GetEnv("XDG_CACHE_HOME")); + if (xdgCacheHome.IsEmpty()) { + xdgCacheHome = "~/.cache"; + } + path.ReplaceSubstring("$XDG_CACHE_HOME", xdgCacheHome.get()); + + // Expand $XDG_DATA_HOME to the environment variable, or ~/.local/share + nsCString xdgDataHome(PR_GetEnv("XDG_DATA_HOME")); + if (xdgDataHome.IsEmpty()) { + xdgDataHome = "~/.local/share"; + } + path.ReplaceSubstring("$XDG_DATA_HOME", xdgDataHome.get()); + + // Expand leading ~ to the user's home directory + nsCOMPtr<nsIFile> homeDir; + nsresult rv = + GetSpecialSystemDirectory(Unix_HomeDirectory, getter_AddRefs(homeDir)); + if (NS_FAILED(rv)) { + errx(1, "failed getting home directory"); + } + if (path.FindChar('~') == 0) { + nsCString tHome(homeDir->NativePath()); + tHome.Append(Substring(path, 1, path.Length() - 1)); + path = tHome.get(); + } +} + +void MkdirP(nsAutoCString& path) { + // nsLocalFile::CreateAllAncestors would be nice to use + + nsAutoCString tPath(""); + for (const nsACString& dir : path.Split('/')) { + struct stat st; + + if (dir.IsEmpty()) { + continue; + } + + tPath.Append("/"); + tPath.Append(dir); + + if (stat(tPath.get(), &st) == -1) { + if (mkdir(tPath.get(), 0700) == -1) { + err(1, "failed mkdir(%s) while MkdirP(%s)", + PromiseFlatCString(tPath).get(), PromiseFlatCString(path).get()); + } + } + } +} + +NS_IMETHODIMP +OpenBSDUnveilPaths(const nsACString& uPath, const nsACString& pledgePath) { + // Using NS_LOCAL_FILE_CONTRACTID/NS_LOCALFILEINPUTSTREAM_CONTRACTID requires + // a lot of setup before they are allowed/supported and we want to pledge and + // unveil early on before all of that is setup + std::ifstream input(PromiseFlatCString(uPath).get()); + + bool disabled = false; + int linenum = 0; + for (std::string tLine; std::getline(input, tLine);) { + nsAutoCString line(tLine.c_str()); + linenum++; + + // Cut off any comments at the end of the line, also catches lines + // that are entirely a comment + int32_t hash = line.FindChar('#'); + if (hash >= 0) { + line = Substring(line, 0, hash); + } + line.CompressWhitespace(true, true); + if (line.IsEmpty()) { + continue; + } + + if (linenum == 1 && line.EqualsLiteral("disable")) { + disabled = true; + break; + } + + int32_t space = line.FindChar(' '); + if (space <= 0) { + errx(1, "%s: line %d: invalid format", PromiseFlatCString(uPath).get(), + linenum); + } + + nsAutoCString uPath(Substring(line, 0, space)); + ExpandUnveilPath(uPath); + + nsAutoCString perms(Substring(line, space + 1, line.Length() - space - 1)); + + MOZ_LOG(sPledgeLog, LogLevel::Debug, + ("%s: unveil(%s, %s)\n", PromiseFlatCString(uPath).get(), + uPath.get(), perms.get())); + if (unveil(uPath.get(), perms.get()) == -1 && errno != ENOENT) { + err(1, "%s: unveil(%s, %s) failed", PromiseFlatCString(uPath).get(), + uPath.get(), perms.get()); + } + } + input.close(); + + if (disabled) { + warnx("%s: disabled", PromiseFlatCString(uPath).get()); + } else { + struct stat st; + + // Only unveil the pledgePath file if it's not already unveiled, otherwise + // some containing directory will lose visibility. + if (stat(PromiseFlatCString(pledgePath).get(), &st) == -1) { + if (errno == ENOENT) { + if (unveil(PromiseFlatCString(pledgePath).get(), "r") == -1) { + err(1, "unveil(%s, r) failed", PromiseFlatCString(pledgePath).get()); + } + } else { + err(1, "stat(%s)", PromiseFlatCString(pledgePath).get()); + } + } + } + + return NS_OK; +} + +bool StartOpenBSDSandbox(GeckoProcessType type, ipc::SandboxingKind kind) { + nsAutoCString pledgeFile; + nsAutoCString unveilFile; + char binaryPath[MAXPATHLEN]; + + switch (type) { + case GeckoProcessType_Default: { + OpenBSDFindPledgeUnveilFilePath("pledge.main", pledgeFile); + OpenBSDFindPledgeUnveilFilePath("unveil.main", unveilFile); + + // Ensure dconf dir exists before we veil the filesystem + nsAutoCString dConf("$XDG_RUNTIME_DIR/dconf"); + ExpandUnveilPath(dConf); + MkdirP(dConf); + break; + } + + case GeckoProcessType_Content: + OpenBSDFindPledgeUnveilFilePath("pledge.content", pledgeFile); + OpenBSDFindPledgeUnveilFilePath("unveil.content", unveilFile); + break; + + case GeckoProcessType_GPU: + OpenBSDFindPledgeUnveilFilePath("pledge.gpu", pledgeFile); + OpenBSDFindPledgeUnveilFilePath("unveil.gpu", unveilFile); + break; + + case GeckoProcessType_Socket: + OpenBSDFindPledgeUnveilFilePath("pledge.socket", pledgeFile); + OpenBSDFindPledgeUnveilFilePath("unveil.socket", unveilFile); + break; + + case GeckoProcessType_RDD: + OpenBSDFindPledgeUnveilFilePath("pledge.rdd", pledgeFile); + OpenBSDFindPledgeUnveilFilePath("unveil.rdd", unveilFile); + break; + + case GeckoProcessType_Utility: { + MOZ_RELEASE_ASSERT(kind <= SandboxingKind::COUNT, + "Should define a sandbox"); + switch (kind) { + case ipc::SandboxingKind::GENERIC_UTILITY: + default: + OpenBSDFindPledgeUnveilFilePath("pledge.utility", pledgeFile); + OpenBSDFindPledgeUnveilFilePath("unveil.utility", unveilFile); + break; + } + } break; + + default: + MOZ_ASSERT(false, "unknown process type"); + return false; + } + + nsresult rv = mozilla::BinaryPath::Get(binaryPath); + if (NS_FAILED(rv)) { + errx(1, "failed to cache binary path ?"); + } + + if (NS_WARN_IF(NS_FAILED(OpenBSDUnveilPaths(unveilFile, pledgeFile)))) { + errx(1, "failed reading/parsing %s", unveilFile.get()); + } + + if (NS_WARN_IF(NS_FAILED(OpenBSDPledgePromises(pledgeFile)))) { + errx(1, "failed reading/parsing %s", pledgeFile.get()); + } + + // Don't overwrite an existing session dbus address, but ensure it is set + if (!PR_GetEnv("DBUS_SESSION_BUS_ADDRESS")) { + PR_SetEnv("DBUS_SESSION_BUS_ADDRESS="); + } + + return true; +} +#endif + +} // namespace mozilla + +/* static */ +nsIDOMProcessChild* nsIDOMProcessChild::GetSingleton() { + if (XRE_IsContentProcess()) { + return mozilla::dom::ContentChild::GetSingleton(); + } + return mozilla::dom::InProcessChild::Singleton(); +} |