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gecko-dev
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gecko-dev/dom/workers/WorkerPrivate.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WorkerPrivate.h"
#include "amIAddonManager.h"
#include "nsIClassInfo.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIConsoleService.h"
#include "nsIDOMDOMException.h"
#include "nsIDOMEvent.h"
#include "nsIDOMMessageEvent.h"
#include "nsIDocument.h"
#include "nsIDocShell.h"
#include "nsIInterfaceRequestor.h"
#include "nsIMemoryReporter.h"
#include "nsINetworkInterceptController.h"
#include "nsIPermissionManager.h"
#include "nsIScriptError.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptSecurityManager.h"
#include "nsITabChild.h"
#include "nsITextToSubURI.h"
#include "nsIThreadInternal.h"
#include "nsITimer.h"
#include "nsIURI.h"
#include "nsIURL.h"
#include "nsIWeakReferenceUtils.h"
#include "nsIWorkerDebugger.h"
#include "nsIXPConnect.h"
#include "nsPerformance.h"
#include "nsPIDOMWindow.h"
#include <algorithm>
#include "ImageContainer.h"
#include "jsfriendapi.h"
#include "js/MemoryMetrics.h"
#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include "mozilla/ContentEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/Likely.h"
#include "mozilla/LoadContext.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/ErrorEvent.h"
#include "mozilla/dom/ErrorEventBinding.h"
#include "mozilla/dom/Exceptions.h"
#include "mozilla/dom/FunctionBinding.h"
#include "mozilla/dom/MessageEvent.h"
#include "mozilla/dom/MessageEventBinding.h"
#include "mozilla/dom/MessagePort.h"
#include "mozilla/dom/MessagePortBinding.h"
#include "mozilla/dom/MessagePortList.h"
#include "mozilla/dom/PMessagePort.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PromiseDebugging.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/StructuredCloneHolder.h"
#include "mozilla/dom/TabChild.h"
#include "mozilla/dom/WorkerBinding.h"
#include "mozilla/dom/WorkerDebuggerGlobalScopeBinding.h"
#include "mozilla/dom/WorkerGlobalScopeBinding.h"
#include "mozilla/dom/indexedDB/IDBFactory.h"
#include "mozilla/Preferences.h"
#include "mozilla/TimelineConsumers.h"
#include "mozilla/WorkerTimelineMarker.h"
#include "nsAlgorithm.h"
#include "nsContentUtils.h"
#include "nsCycleCollector.h"
#include "nsError.h"
#include "nsDOMJSUtils.h"
#include "nsHostObjectProtocolHandler.h"
#include "nsJSEnvironment.h"
#include "nsJSUtils.h"
#include "nsNetUtil.h"
#include "nsPrintfCString.h"
#include "nsProxyRelease.h"
#include "nsQueryObject.h"
#include "nsSandboxFlags.h"
#include "prthread.h"
#include "xpcpublic.h"
#ifdef ANDROID
#include <android/log.h>
#endif
#ifdef DEBUG
#include "nsThreadManager.h"
#endif
#include "Navigator.h"
#include "Principal.h"
#include "RuntimeService.h"
#include "ScriptLoader.h"
#include "ServiceWorkerManager.h"
#include "ServiceWorkerWindowClient.h"
#include "SharedWorker.h"
#include "WorkerDebuggerManager.h"
#include "WorkerFeature.h"
#include "WorkerRunnable.h"
#include "WorkerScope.h"
#include "WorkerThread.h"
#ifdef XP_WIN
#undef PostMessage
#endif
// JS_MaybeGC will run once every second during normal execution.
#define PERIODIC_GC_TIMER_DELAY_SEC 1
// A shrinking GC will run five seconds after the last event is processed.
#define IDLE_GC_TIMER_DELAY_SEC 5
#define PREF_WORKERS_ENABLED "dom.workers.enabled"
static mozilla::LazyLogModule sWorkerPrivateLog("WorkerPrivate");
static mozilla::LazyLogModule sWorkerTimeoutsLog("WorkerTimeouts");
mozilla::LogModule*
WorkerLog()
{
return sWorkerPrivateLog;
}
mozilla::LogModule*
TimeoutsLog()
{
return sWorkerTimeoutsLog;
}
#define LOG(log, _args) MOZ_LOG(log, LogLevel::Debug, _args);
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::ipc;
USING_WORKERS_NAMESPACE
MOZ_DEFINE_MALLOC_SIZE_OF(JsWorkerMallocSizeOf)
#ifdef DEBUG
BEGIN_WORKERS_NAMESPACE
void
AssertIsOnMainThread()
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
}
END_WORKERS_NAMESPACE
#endif
namespace {
#ifdef DEBUG
const nsIID kDEBUGWorkerEventTargetIID = {
0xccaba3fa, 0x5be2, 0x4de2, { 0xba, 0x87, 0x3b, 0x3b, 0x5b, 0x1d, 0x5, 0xfb }
};
#endif
template <class T>
class AutoPtrComparator
{
typedef nsAutoPtr<T> A;
typedef T* B;
public:
bool Equals(const A& a, const B& b) const {
return a && b ? *a == *b : !a && !b ? true : false;
}
bool LessThan(const A& a, const B& b) const {
return a && b ? *a < *b : b ? true : false;
}
};
template <class T>
inline AutoPtrComparator<T>
GetAutoPtrComparator(const nsTArray<nsAutoPtr<T> >&)
{
return AutoPtrComparator<T>();
}
// Specialize this if there's some class that has multiple nsISupports bases.
template <class T>
struct ISupportsBaseInfo
{
typedef T ISupportsBase;
};
template <template <class> class SmartPtr, class T>
inline void
SwapToISupportsArray(SmartPtr<T>& aSrc,
nsTArray<nsCOMPtr<nsISupports> >& aDest)
{
nsCOMPtr<nsISupports>* dest = aDest.AppendElement();
T* raw = nullptr;
aSrc.swap(raw);
nsISupports* rawSupports =
static_cast<typename ISupportsBaseInfo<T>::ISupportsBase*>(raw);
dest->swap(rawSupports);
}
// This class is used to wrap any runnables that the worker receives via the
// nsIEventTarget::Dispatch() method (either from NS_DispatchToCurrentThread or
// from the worker's EventTarget).
class ExternalRunnableWrapper final : public WorkerRunnable
{
nsCOMPtr<nsICancelableRunnable> mWrappedRunnable;
public:
ExternalRunnableWrapper(WorkerPrivate* aWorkerPrivate,
nsICancelableRunnable* aWrappedRunnable)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mWrappedRunnable(aWrappedRunnable)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aWrappedRunnable);
}
NS_DECL_ISUPPORTS_INHERITED
private:
~ExternalRunnableWrapper()
{ }
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
nsresult rv = mWrappedRunnable->Run();
if (NS_FAILED(rv)) {
if (!JS_IsExceptionPending(aCx)) {
Throw(aCx, rv);
}
return false;
}
return true;
}
NS_IMETHOD
Cancel() override
{
nsresult rv = mWrappedRunnable->Cancel();
nsresult rv2 = WorkerRunnable::Cancel();
return NS_FAILED(rv) ? rv : rv2;
}
};
struct WindowAction
{
nsPIDOMWindow* mWindow;
bool mDefaultAction;
MOZ_IMPLICIT WindowAction(nsPIDOMWindow* aWindow)
: mWindow(aWindow), mDefaultAction(true)
{ }
bool
operator==(const WindowAction& aOther) const
{
return mWindow == aOther.mWindow;
}
};
void
LogErrorToConsole(const nsAString& aMessage,
const nsAString& aFilename,
const nsAString& aLine,
uint32_t aLineNumber,
uint32_t aColumnNumber,
uint32_t aFlags,
uint64_t aInnerWindowId)
{
AssertIsOnMainThread();
nsCOMPtr<nsIScriptError> scriptError =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
NS_WARN_IF_FALSE(scriptError, "Failed to create script error!");
if (scriptError) {
if (NS_FAILED(scriptError->InitWithWindowID(aMessage, aFilename, aLine,
aLineNumber, aColumnNumber,
aFlags, "Web Worker",
aInnerWindowId))) {
NS_WARNING("Failed to init script error!");
scriptError = nullptr;
}
}
nsCOMPtr<nsIConsoleService> consoleService =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
NS_WARN_IF_FALSE(consoleService, "Failed to get console service!");
if (consoleService) {
if (scriptError) {
if (NS_SUCCEEDED(consoleService->LogMessage(scriptError))) {
return;
}
NS_WARNING("LogMessage failed!");
} else if (NS_SUCCEEDED(consoleService->LogStringMessage(
aMessage.BeginReading()))) {
return;
}
NS_WARNING("LogStringMessage failed!");
}
NS_ConvertUTF16toUTF8 msg(aMessage);
NS_ConvertUTF16toUTF8 filename(aFilename);
static const char kErrorString[] = "JS error in Web Worker: %s [%s:%u]";
#ifdef ANDROID
__android_log_print(ANDROID_LOG_INFO, "Gecko", kErrorString, msg.get(),
filename.get(), aLineNumber);
#endif
fprintf(stderr, kErrorString, msg.get(), filename.get(), aLineNumber);
fflush(stderr);
}
class MainThreadReleaseRunnable final : public nsRunnable
{
nsTArray<nsCOMPtr<nsISupports>> mDoomed;
nsCOMPtr<nsILoadGroup> mLoadGroupToCancel;
public:
MainThreadReleaseRunnable(nsTArray<nsCOMPtr<nsISupports>>& aDoomed,
nsCOMPtr<nsILoadGroup>& aLoadGroupToCancel)
{
mDoomed.SwapElements(aDoomed);
mLoadGroupToCancel.swap(aLoadGroupToCancel);
}
NS_DECL_ISUPPORTS_INHERITED
NS_IMETHOD
Run() override
{
if (mLoadGroupToCancel) {
mLoadGroupToCancel->Cancel(NS_BINDING_ABORTED);
mLoadGroupToCancel = nullptr;
}
mDoomed.Clear();
return NS_OK;
}
private:
~MainThreadReleaseRunnable()
{ }
};
class WorkerFinishedRunnable final : public WorkerControlRunnable
{
WorkerPrivate* mFinishedWorker;
public:
WorkerFinishedRunnable(WorkerPrivate* aWorkerPrivate,
WorkerPrivate* aFinishedWorker)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mFinishedWorker(aFinishedWorker)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
// Silence bad assertions.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
nsCOMPtr<nsILoadGroup> loadGroupToCancel;
mFinishedWorker->ForgetOverridenLoadGroup(loadGroupToCancel);
nsTArray<nsCOMPtr<nsISupports>> doomed;
mFinishedWorker->ForgetMainThreadObjects(doomed);
RefPtr<MainThreadReleaseRunnable> runnable =
new MainThreadReleaseRunnable(doomed, loadGroupToCancel);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
NS_WARNING("Failed to dispatch, going to leak!");
}
RuntimeService* runtime = RuntimeService::GetService();
NS_ASSERTION(runtime, "This should never be null!");
mFinishedWorker->DisableDebugger();
runtime->UnregisterWorker(aCx, mFinishedWorker);
mFinishedWorker->ClearSelfRef();
return true;
}
};
class TopLevelWorkerFinishedRunnable final : public nsRunnable
{
WorkerPrivate* mFinishedWorker;
public:
explicit TopLevelWorkerFinishedRunnable(WorkerPrivate* aFinishedWorker)
: mFinishedWorker(aFinishedWorker)
{
aFinishedWorker->AssertIsOnWorkerThread();
}
NS_DECL_ISUPPORTS_INHERITED
private:
~TopLevelWorkerFinishedRunnable() {}
NS_IMETHOD
Run() override
{
AssertIsOnMainThread();
RuntimeService* runtime = RuntimeService::GetService();
MOZ_ASSERT(runtime);
AutoSafeJSContext cx;
JSAutoRequest ar(cx);
mFinishedWorker->DisableDebugger();
runtime->UnregisterWorker(cx, mFinishedWorker);
nsCOMPtr<nsILoadGroup> loadGroupToCancel;
mFinishedWorker->ForgetOverridenLoadGroup(loadGroupToCancel);
nsTArray<nsCOMPtr<nsISupports> > doomed;
mFinishedWorker->ForgetMainThreadObjects(doomed);
RefPtr<MainThreadReleaseRunnable> runnable =
new MainThreadReleaseRunnable(doomed, loadGroupToCancel);
if (NS_FAILED(NS_DispatchToCurrentThread(runnable))) {
NS_WARNING("Failed to dispatch, going to leak!");
}
mFinishedWorker->ClearSelfRef();
return NS_OK;
}
};
class ModifyBusyCountRunnable final : public WorkerControlRunnable
{
bool mIncrease;
public:
ModifyBusyCountRunnable(WorkerPrivate* aWorkerPrivate, bool aIncrease)
: WorkerControlRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount),
mIncrease(aIncrease)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
return aWorkerPrivate->ModifyBusyCount(aCx, mIncrease);
}
virtual void
PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate, bool aRunResult)
override
{
if (mIncrease) {
WorkerControlRunnable::PostRun(aCx, aWorkerPrivate, aRunResult);
return;
}
// Don't do anything here as it's possible that aWorkerPrivate has been
// deleted.
}
};
class CompileScriptRunnable final : public WorkerRunnable
{
nsString mScriptURL;
public:
explicit CompileScriptRunnable(WorkerPrivate* aWorkerPrivate,
const nsAString& aScriptURL)
: WorkerRunnable(aWorkerPrivate, WorkerThreadModifyBusyCount),
mScriptURL(aScriptURL)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
ErrorResult rv;
scriptloader::LoadMainScript(aCx, mScriptURL, WorkerScript, rv);
if (NS_WARN_IF(rv.Failed())) {
// I guess suppress the exception since that's what we used to
// do, though this seems moderately weird.
rv.SuppressException();
return false;
}
aWorkerPrivate->SetWorkerScriptExecutedSuccessfully();
return true;
}
};
class CompileDebuggerScriptRunnable final : public WorkerDebuggerRunnable
{
nsString mScriptURL;
public:
CompileDebuggerScriptRunnable(WorkerPrivate* aWorkerPrivate,
const nsAString& aScriptURL)
: WorkerDebuggerRunnable(aWorkerPrivate),
mScriptURL(aScriptURL)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
WorkerDebuggerGlobalScope* globalScope =
aWorkerPrivate->CreateDebuggerGlobalScope(aCx);
if (!globalScope) {
NS_WARNING("Failed to make global!");
return false;
}
JS::Rooted<JSObject*> global(aCx, globalScope->GetWrapper());
ErrorResult rv;
JSAutoCompartment ac(aCx, global);
scriptloader::LoadMainScript(aCx, mScriptURL, DebuggerScript, rv);
if (NS_WARN_IF(rv.Failed())) {
// I guess suppress the exception since that's what we used to
// do, though this seems moderately weird.
rv.SuppressException();
return false;
}
return true;
}
};
class CloseEventRunnable final : public WorkerRunnable
{
public:
explicit CloseEventRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
MOZ_CRASH("Don't call Dispatch() on CloseEventRunnable!");
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
MOZ_CRASH("Don't call Dispatch() on CloseEventRunnable!");
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
JS::Rooted<JSObject*> target(aCx, JS::CurrentGlobalOrNull(aCx));
NS_ASSERTION(target, "This must never be null!");
aWorkerPrivate->CloseHandlerStarted();
WorkerGlobalScope* globalScope = aWorkerPrivate->GlobalScope();
RefPtr<Event> event = NS_NewDOMEvent(globalScope, nullptr, nullptr);
event->InitEvent(NS_LITERAL_STRING("close"), false, false);
event->SetTrusted(true);
globalScope->DispatchDOMEvent(nullptr, event, nullptr, nullptr);
return true;
}
NS_IMETHOD Cancel() override
{
// We need to run regardless.
Run();
return WorkerRunnable::Cancel();
}
virtual void
PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate, bool aRunResult)
override
{
// Report errors.
WorkerRunnable::PostRun(aCx, aWorkerPrivate, aRunResult);
// Match the busy count increase from NotifyRunnable.
if (!aWorkerPrivate->ModifyBusyCountFromWorker(aCx, false)) {
JS_ReportPendingException(aCx);
}
aWorkerPrivate->CloseHandlerFinished();
}
};
class MessageEventRunnable final : public WorkerRunnable
, public StructuredCloneHolder
{
// This is only used for messages dispatched to a service worker.
UniquePtr<ServiceWorkerClientInfo> mEventSource;
public:
MessageEventRunnable(WorkerPrivate* aWorkerPrivate,
TargetAndBusyBehavior aBehavior)
: WorkerRunnable(aWorkerPrivate, aBehavior)
, StructuredCloneHolder(CloningSupported, TransferringSupported,
SameProcessDifferentThread)
{
}
void
SetMessageSource(UniquePtr<ServiceWorkerClientInfo>&& aSource)
{
mEventSource = Move(aSource);
}
bool
DispatchDOMEvent(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
DOMEventTargetHelper* aTarget, bool aIsMainThread)
{
nsCOMPtr<nsPIDOMWindow> parent;
if (aIsMainThread) {
parent = do_QueryInterface(aTarget->GetParentObject());
}
JS::Rooted<JS::Value> messageData(aCx);
ErrorResult rv;
UniquePtr<AbstractTimelineMarker> start;
UniquePtr<AbstractTimelineMarker> end;
RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
bool isTimelineRecording = timelines && !timelines->IsEmpty();
if (isTimelineRecording) {
start = MakeUnique<WorkerTimelineMarker>(aIsMainThread
? ProfileTimelineWorkerOperationType::DeserializeDataOnMainThread
: ProfileTimelineWorkerOperationType::DeserializeDataOffMainThread,
MarkerTracingType::START);
}
Read(parent, aCx, &messageData, rv);
if (isTimelineRecording) {
end = MakeUnique<WorkerTimelineMarker>(aIsMainThread
? ProfileTimelineWorkerOperationType::DeserializeDataOnMainThread
: ProfileTimelineWorkerOperationType::DeserializeDataOffMainThread,
MarkerTracingType::END);
timelines->AddMarkerForAllObservedDocShells(start);
timelines->AddMarkerForAllObservedDocShells(end);
}
if (NS_WARN_IF(rv.Failed())) {
xpc::Throw(aCx, rv.StealNSResult());
return false;
}
nsTArray<RefPtr<MessagePort>> ports = TakeTransferredPorts();
nsCOMPtr<nsIDOMEvent> domEvent;
// For messages dispatched to service worker, use ExtendableMessageEvent
// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#extendablemessage-event-section
if (mEventSource) {
RefPtr<ServiceWorkerClient> client =
new ServiceWorkerWindowClient(aTarget, *mEventSource);
RootedDictionary<ExtendableMessageEventInit> init(aCx);
init.mBubbles = false;
init.mCancelable = false;
init.mData = messageData;
init.mPorts.Construct();
init.mPorts.Value().SetNull();
ErrorResult rv;
RefPtr<ExtendableMessageEvent> event = ExtendableMessageEvent::Constructor(
aTarget, NS_LITERAL_STRING("message"), init, rv);
if (NS_WARN_IF(rv.Failed())) {
return false;
}
event->SetSource(client);
event->SetPorts(new MessagePortList(static_cast<dom::Event*>(event.get()),
ports));
domEvent = do_QueryObject(event);
} else {
RefPtr<MessageEvent> event = new MessageEvent(aTarget, nullptr, nullptr);
nsresult rv = event->InitMessageEvent(NS_LITERAL_STRING("message"),
false /* non-bubbling */,
false /* cancelable */,
messageData,
EmptyString(),
EmptyString(),
nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
xpc::Throw(aCx, rv);
return false;
}
event->SetPorts(new MessagePortList(static_cast<dom::Event*>(event.get()),
ports));
domEvent = do_QueryObject(event);
}
domEvent->SetTrusted(true);
nsEventStatus dummy = nsEventStatus_eIgnore;
aTarget->DispatchDOMEvent(nullptr, domEvent, nullptr, &dummy);
return true;
}
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
if (mBehavior == ParentThreadUnchangedBusyCount) {
// Don't fire this event if the JS object has been disconnected from the
// private object.
if (!aWorkerPrivate->IsAcceptingEvents()) {
return true;
}
if (aWorkerPrivate->IsFrozen() || aWorkerPrivate->IsSuspended()) {
MOZ_ASSERT(!IsDebuggerRunnable());
aWorkerPrivate->QueueRunnable(this);
return true;
}
aWorkerPrivate->AssertInnerWindowIsCorrect();
return DispatchDOMEvent(aCx, aWorkerPrivate, aWorkerPrivate,
!aWorkerPrivate->GetParent());
}
MOZ_ASSERT(aWorkerPrivate == GetWorkerPrivateFromContext(aCx));
return DispatchDOMEvent(aCx, aWorkerPrivate, aWorkerPrivate->GlobalScope(),
false);
}
};
class DebuggerMessageEventRunnable : public WorkerDebuggerRunnable {
nsString mMessage;
public:
DebuggerMessageEventRunnable(WorkerPrivate* aWorkerPrivate,
const nsAString& aMessage)
: WorkerDebuggerRunnable(aWorkerPrivate),
mMessage(aMessage)
{
}
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
WorkerDebuggerGlobalScope* globalScope = aWorkerPrivate->DebuggerGlobalScope();
MOZ_ASSERT(globalScope);
JS::Rooted<JSString*> message(aCx, JS_NewUCStringCopyN(aCx, mMessage.get(),
mMessage.Length()));
if (!message) {
return false;
}
JS::Rooted<JS::Value> data(aCx, JS::StringValue(message));
RefPtr<MessageEvent> event = new MessageEvent(globalScope, nullptr,
nullptr);
nsresult rv =
event->InitMessageEvent(NS_LITERAL_STRING("message"),
false, // canBubble
true, // cancelable
data,
EmptyString(),
EmptyString(),
nullptr);
if (NS_FAILED(rv)) {
xpc::Throw(aCx, rv);
return false;
}
event->SetTrusted(true);
nsCOMPtr<nsIDOMEvent> domEvent = do_QueryObject(event);
nsEventStatus status = nsEventStatus_eIgnore;
globalScope->DispatchDOMEvent(nullptr, domEvent, nullptr, &status);
return true;
}
};
class NotifyRunnable final : public WorkerControlRunnable
{
Status mStatus;
public:
NotifyRunnable(WorkerPrivate* aWorkerPrivate, Status aStatus)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mStatus(aStatus)
{
MOZ_ASSERT(aStatus == Closing || aStatus == Terminating ||
aStatus == Canceling || aStatus == Killing);
}
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// Modify here, but not in PostRun! This busy count addition will be matched
// by the CloseEventRunnable.
return aWorkerPrivate->ModifyBusyCount(aCx, true);
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
if (!aDispatchResult) {
// We couldn't dispatch to the worker, which means it's already dead.
// Undo the busy count modification.
aWorkerPrivate->ModifyBusyCount(aCx, false);
}
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
return aWorkerPrivate->NotifyInternal(aCx, mStatus);
}
};
class CloseRunnable final : public WorkerControlRunnable
{
public:
explicit CloseRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// This busy count will be matched by the CloseEventRunnable.
return aWorkerPrivate->ModifyBusyCount(aCx, true) &&
aWorkerPrivate->Close();
}
};
class FreezeRunnable final : public WorkerControlRunnable
{
public:
explicit FreezeRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
return aWorkerPrivate->FreezeInternal(aCx);
}
};
class ThawRunnable final : public WorkerControlRunnable
{
public:
explicit ThawRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
return aWorkerPrivate->ThawInternal(aCx);
}
};
class ReportErrorRunnable final : public WorkerRunnable
{
nsString mMessage;
nsString mFilename;
nsString mLine;
uint32_t mLineNumber;
uint32_t mColumnNumber;
uint32_t mFlags;
uint32_t mErrorNumber;
JSExnType mExnType;
bool mMutedError;
public:
// aWorkerPrivate is the worker thread we're on (or the main thread, if null)
// aTarget is the worker object that we are going to fire an error at
// (if any).
static bool
ReportError(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aFireAtScope, WorkerPrivate* aTarget,
const nsString& aMessage, const nsString& aFilename,
const nsString& aLine, uint32_t aLineNumber,
uint32_t aColumnNumber, uint32_t aFlags,
uint32_t aErrorNumber, JSExnType aExnType,
bool aMutedError, uint64_t aInnerWindowId)
{
if (aWorkerPrivate) {
aWorkerPrivate->AssertIsOnWorkerThread();
} else {
AssertIsOnMainThread();
}
JS::Rooted<JSString*> message(aCx, JS_NewUCStringCopyN(aCx, aMessage.get(),
aMessage.Length()));
if (!message) {
return false;
}
JS::Rooted<JSString*> filename(aCx, JS_NewUCStringCopyN(aCx, aFilename.get(),
aFilename.Length()));
if (!filename) {
return false;
}
// We should not fire error events for warnings but instead make sure that
// they show up in the error console.
if (!JSREPORT_IS_WARNING(aFlags)) {
// First fire an ErrorEvent at the worker.
RootedDictionary<ErrorEventInit> init(aCx);
if (aMutedError) {
init.mMessage.AssignLiteral("Script error.");
} else {
init.mMessage = aMessage;
init.mFilename = aFilename;
init.mLineno = aLineNumber;
}
init.mCancelable = true;
init.mBubbles = false;
if (aTarget) {
RefPtr<ErrorEvent> event =
ErrorEvent::Constructor(aTarget, NS_LITERAL_STRING("error"), init);
event->SetTrusted(true);
nsEventStatus status = nsEventStatus_eIgnore;
aTarget->DispatchDOMEvent(nullptr, event, nullptr, &status);
if (status == nsEventStatus_eConsumeNoDefault) {
return true;
}
}
// Now fire an event at the global object, but don't do that if the error
// code is too much recursion and this is the same script threw the error.
if (aFireAtScope && (aTarget || aErrorNumber != JSMSG_OVER_RECURSED)) {
JS::Rooted<JSObject*> global(aCx, JS::CurrentGlobalOrNull(aCx));
NS_ASSERTION(global, "This should never be null!");
nsEventStatus status = nsEventStatus_eIgnore;
nsIScriptGlobalObject* sgo;
if (aWorkerPrivate) {
WorkerGlobalScope* globalScope = nullptr;
UNWRAP_WORKER_OBJECT(WorkerGlobalScope, global, globalScope);
if (!globalScope) {
WorkerDebuggerGlobalScope* globalScope = nullptr;
UNWRAP_OBJECT(WorkerDebuggerGlobalScope, global, globalScope);
MOZ_ASSERT_IF(globalScope, globalScope->GetWrapperPreserveColor() == global);
MOZ_ASSERT_IF(!globalScope, IsDebuggerSandbox(global));
aWorkerPrivate->ReportErrorToDebugger(aFilename, aLineNumber,
aMessage);
return true;
}
MOZ_ASSERT(globalScope->GetWrapperPreserveColor() == global);
nsIDOMEventTarget* target = static_cast<nsIDOMEventTarget*>(globalScope);
RefPtr<ErrorEvent> event =
ErrorEvent::Constructor(aTarget, NS_LITERAL_STRING("error"), init);
event->SetTrusted(true);
if (NS_FAILED(EventDispatcher::DispatchDOMEvent(target, nullptr,
event, nullptr,
&status))) {
NS_WARNING("Failed to dispatch worker thread error event!");
status = nsEventStatus_eIgnore;
}
}
else if ((sgo = nsJSUtils::GetStaticScriptGlobal(global))) {
MOZ_ASSERT(NS_IsMainThread());
if (NS_FAILED(sgo->HandleScriptError(init, &status))) {
NS_WARNING("Failed to dispatch main thread error event!");
status = nsEventStatus_eIgnore;
}
}
// Was preventDefault() called?
if (status == nsEventStatus_eConsumeNoDefault) {
return true;
}
}
}
// Now fire a runnable to do the same on the parent's thread if we can.
if (aWorkerPrivate) {
RefPtr<ReportErrorRunnable> runnable =
new ReportErrorRunnable(aWorkerPrivate, aMessage, aFilename, aLine,
aLineNumber, aColumnNumber, aFlags,
aErrorNumber, aExnType, aMutedError);
return runnable->Dispatch(aCx);
}
// Otherwise log an error to the error console.
LogErrorToConsole(aMessage, aFilename, aLine, aLineNumber, aColumnNumber,
aFlags, aInnerWindowId);
return true;
}
private:
ReportErrorRunnable(WorkerPrivate* aWorkerPrivate, const nsString& aMessage,
const nsString& aFilename, const nsString& aLine,
uint32_t aLineNumber, uint32_t aColumnNumber,
uint32_t aFlags, uint32_t aErrorNumber,
JSExnType aExnType, bool aMutedError)
: WorkerRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount),
mMessage(aMessage), mFilename(aFilename), mLine(aLine),
mLineNumber(aLineNumber), mColumnNumber(aColumnNumber), mFlags(aFlags),
mErrorNumber(aErrorNumber), mExnType(aExnType), mMutedError(aMutedError)
{ }
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
aWorkerPrivate->AssertIsOnWorkerThread();
// Dispatch may fail if the worker was canceled, no need to report that as
// an error, so don't call base class PostDispatch.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
JS::Rooted<JSObject*> target(aCx, aWorkerPrivate->GetWrapper());
uint64_t innerWindowId;
bool fireAtScope = true;
bool workerIsAcceptingEvents = aWorkerPrivate->IsAcceptingEvents();
WorkerPrivate* parent = aWorkerPrivate->GetParent();
if (parent) {
innerWindowId = 0;
}
else {
AssertIsOnMainThread();
if (aWorkerPrivate->IsFrozen() || aWorkerPrivate->IsSuspended()) {
MOZ_ASSERT(!IsDebuggerRunnable());
aWorkerPrivate->QueueRunnable(this);
return true;
}
if (aWorkerPrivate->IsSharedWorker()) {
aWorkerPrivate->BroadcastErrorToSharedWorkers(aCx, mMessage, mFilename,
mLine, mLineNumber,
mColumnNumber, mFlags);
return true;
}
// Service workers do not have a main thread parent global, so normal
// worker error reporting will crash. Instead, pass the error to
// the ServiceWorkerManager to report on any controlled documents.
if (aWorkerPrivate->IsServiceWorker()) {
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
MOZ_ASSERT(swm);
swm->HandleError(aCx, aWorkerPrivate->GetPrincipal(),
aWorkerPrivate->WorkerName(),
aWorkerPrivate->ScriptURL(),
mMessage,
mFilename, mLine, mLineNumber,
mColumnNumber, mFlags, mExnType);
return true;
}
// The innerWindowId is only required if we are going to ReportError
// below, which is gated on this condition. The inner window correctness
// check is only going to succeed when the worker is accepting events.
if (workerIsAcceptingEvents) {
aWorkerPrivate->AssertInnerWindowIsCorrect();
innerWindowId = aWorkerPrivate->WindowID();
}
}
// Don't fire this event if the JS object has been disconnected from the
// private object.
if (!workerIsAcceptingEvents) {
return true;
}
return ReportError(aCx, parent, fireAtScope, aWorkerPrivate, mMessage,
mFilename, mLine, mLineNumber, mColumnNumber, mFlags,
mErrorNumber, mExnType, mMutedError, innerWindowId);
}
};
class TimerRunnable final : public WorkerRunnable,
public nsITimerCallback
{
public:
NS_DECL_ISUPPORTS_INHERITED
explicit TimerRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
~TimerRunnable() {}
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
// Silence bad assertions.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
return aWorkerPrivate->RunExpiredTimeouts(aCx);
}
NS_IMETHOD
Notify(nsITimer* aTimer) override
{
return Run();
}
};
NS_IMPL_ISUPPORTS_INHERITED(TimerRunnable, WorkerRunnable, nsITimerCallback)
class DebuggerImmediateRunnable : public WorkerRunnable
{
RefPtr<dom::Function> mHandler;
public:
explicit DebuggerImmediateRunnable(WorkerPrivate* aWorkerPrivate,
dom::Function& aHandler)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mHandler(&aHandler)
{ }
private:
virtual bool
IsDebuggerRunnable() const override
{
return true;
}
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
// Silence bad assertions.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
JS::Rooted<JSObject*> global(aCx, JS::CurrentGlobalOrNull(aCx));
JS::Rooted<JS::Value> callable(aCx, JS::ObjectValue(*mHandler->Callable()));
JS::HandleValueArray args = JS::HandleValueArray::empty();
JS::Rooted<JS::Value> rval(aCx);
if (!JS_CallFunctionValue(aCx, global, callable, args, &rval) &&
!JS_ReportPendingException(aCx)) {
return false;
}
return true;
}
};
void
DummyCallback(nsITimer* aTimer, void* aClosure)
{
// Nothing!
}
class KillCloseEventRunnable final : public WorkerRunnable
{
nsCOMPtr<nsITimer> mTimer;
class KillScriptRunnable final : public WorkerControlRunnable
{
public:
explicit KillScriptRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions, this is dispatched from the timer thread.
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
// Silence bad assertions, this is dispatched from the timer thread.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// Kill running script.
return false;
}
};
public:
explicit KillCloseEventRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
bool
SetTimeout(JSContext* aCx, uint32_t aDelayMS)
{
nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (!timer) {
JS_ReportError(aCx, "Failed to create timer!");
return false;
}
RefPtr<KillScriptRunnable> runnable =
new KillScriptRunnable(mWorkerPrivate);
RefPtr<TimerThreadEventTarget> target =
new TimerThreadEventTarget(mWorkerPrivate, runnable);
if (NS_FAILED(timer->SetTarget(target))) {
JS_ReportError(aCx, "Failed to set timer's target!");
return false;
}
if (NS_FAILED(timer->InitWithNamedFuncCallback(
DummyCallback, nullptr, aDelayMS, nsITimer::TYPE_ONE_SHOT,
"dom::workers::DummyCallback(1)"))) {
JS_ReportError(aCx, "Failed to start timer!");
return false;
}
mTimer.swap(timer);
return true;
}
private:
~KillCloseEventRunnable()
{
if (mTimer) {
mTimer->Cancel();
}
}
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
MOZ_CRASH("Don't call Dispatch() on KillCloseEventRunnable!");
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
MOZ_CRASH("Don't call Dispatch() on KillCloseEventRunnable!");
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
if (mTimer) {
mTimer->Cancel();
mTimer = nullptr;
}
return true;
}
NS_IMETHOD Cancel() override
{
// We need to run regardless.
Run();
return WorkerRunnable::Cancel();
}
};
class UpdateRuntimeOptionsRunnable final : public WorkerControlRunnable
{
JS::RuntimeOptions mRuntimeOptions;
public:
UpdateRuntimeOptionsRunnable(
WorkerPrivate* aWorkerPrivate,
const JS::RuntimeOptions& aRuntimeOptions)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mRuntimeOptions(aRuntimeOptions)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->UpdateRuntimeOptionsInternal(aCx, mRuntimeOptions);
return true;
}
};
class UpdatePreferenceRunnable final : public WorkerControlRunnable
{
WorkerPreference mPref;
bool mValue;
public:
UpdatePreferenceRunnable(WorkerPrivate* aWorkerPrivate,
WorkerPreference aPref,
bool aValue)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mPref(aPref),
mValue(aValue)
{ }
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->UpdatePreferenceInternal(aCx, mPref, mValue);
return true;
}
};
class UpdateLanguagesRunnable final : public WorkerRunnable
{
nsTArray<nsString> mLanguages;
public:
UpdateLanguagesRunnable(WorkerPrivate* aWorkerPrivate,
const nsTArray<nsString>& aLanguages)
: WorkerRunnable(aWorkerPrivate, WorkerThreadModifyBusyCount),
mLanguages(aLanguages)
{ }
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->UpdateLanguagesInternal(aCx, mLanguages);
return true;
}
};
class UpdateJSWorkerMemoryParameterRunnable final :
public WorkerControlRunnable
{
uint32_t mValue;
JSGCParamKey mKey;
public:
UpdateJSWorkerMemoryParameterRunnable(WorkerPrivate* aWorkerPrivate,
JSGCParamKey aKey,
uint32_t aValue)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mValue(aValue), mKey(aKey)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->UpdateJSWorkerMemoryParameterInternal(aCx, mKey, mValue);
return true;
}
};
#ifdef JS_GC_ZEAL
class UpdateGCZealRunnable final : public WorkerControlRunnable
{
uint8_t mGCZeal;
uint32_t mFrequency;
public:
UpdateGCZealRunnable(WorkerPrivate* aWorkerPrivate,
uint8_t aGCZeal,
uint32_t aFrequency)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mGCZeal(aGCZeal), mFrequency(aFrequency)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->UpdateGCZealInternal(aCx, mGCZeal, mFrequency);
return true;
}
};
#endif
class GarbageCollectRunnable final : public WorkerControlRunnable
{
bool mShrinking;
bool mCollectChildren;
public:
GarbageCollectRunnable(WorkerPrivate* aWorkerPrivate, bool aShrinking,
bool aCollectChildren)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mShrinking(aShrinking), mCollectChildren(aCollectChildren)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions, this can be dispatched from either the main
// thread or the timer thread..
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
// Silence bad assertions, this can be dispatched from either the main
// thread or the timer thread..
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->GarbageCollectInternal(aCx, mShrinking, mCollectChildren);
return true;
}
};
class CycleCollectRunnable : public WorkerControlRunnable
{
bool mCollectChildren;
public:
CycleCollectRunnable(WorkerPrivate* aWorkerPrivate, bool aCollectChildren)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mCollectChildren(aCollectChildren)
{ }
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
aWorkerPrivate->CycleCollectInternal(aCx, mCollectChildren);
return true;
}
};
class OfflineStatusChangeRunnable : public WorkerRunnable
{
public:
OfflineStatusChangeRunnable(WorkerPrivate* aWorkerPrivate, bool aIsOffline)
: WorkerRunnable(aWorkerPrivate, WorkerThreadModifyBusyCount),
mIsOffline(aIsOffline)
{
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
aWorkerPrivate->OfflineStatusChangeEventInternal(aCx, mIsOffline);
return true;
}
private:
bool mIsOffline;
};
#ifdef DEBUG
static bool
StartsWithExplicit(nsACString& s)
{
return StringBeginsWith(s, NS_LITERAL_CSTRING("explicit/"));
}
#endif
class WorkerJSRuntimeStats : public JS::RuntimeStats
{
const nsACString& mRtPath;
public:
explicit WorkerJSRuntimeStats(const nsACString& aRtPath)
: JS::RuntimeStats(JsWorkerMallocSizeOf), mRtPath(aRtPath)
{ }
~WorkerJSRuntimeStats()
{
for (size_t i = 0; i != zoneStatsVector.length(); i++) {
delete static_cast<xpc::ZoneStatsExtras*>(zoneStatsVector[i].extra);
}
for (size_t i = 0; i != compartmentStatsVector.length(); i++) {
delete static_cast<xpc::CompartmentStatsExtras*>(compartmentStatsVector[i].extra);
}
}
virtual void
initExtraZoneStats(JS::Zone* aZone,
JS::ZoneStats* aZoneStats)
override
{
MOZ_ASSERT(!aZoneStats->extra);
// ReportJSRuntimeExplicitTreeStats expects that
// aZoneStats->extra is a xpc::ZoneStatsExtras pointer.
xpc::ZoneStatsExtras* extras = new xpc::ZoneStatsExtras;
extras->pathPrefix = mRtPath;
extras->pathPrefix += nsPrintfCString("zone(0x%p)/", (void *)aZone);
MOZ_ASSERT(StartsWithExplicit(extras->pathPrefix));
aZoneStats->extra = extras;
}
virtual void
initExtraCompartmentStats(JSCompartment* aCompartment,
JS::CompartmentStats* aCompartmentStats)
override
{
MOZ_ASSERT(!aCompartmentStats->extra);
// ReportJSRuntimeExplicitTreeStats expects that
// aCompartmentStats->extra is a xpc::CompartmentStatsExtras pointer.
xpc::CompartmentStatsExtras* extras = new xpc::CompartmentStatsExtras;
// This is the |jsPathPrefix|. Each worker has exactly two compartments:
// one for atoms, and one for everything else.
extras->jsPathPrefix.Assign(mRtPath);
extras->jsPathPrefix += nsPrintfCString("zone(0x%p)/",
(void *)js::GetCompartmentZone(aCompartment));
extras->jsPathPrefix += js::IsAtomsCompartment(aCompartment)
? NS_LITERAL_CSTRING("compartment(web-worker-atoms)/")
: NS_LITERAL_CSTRING("compartment(web-worker)/");
// This should never be used when reporting with workers (hence the "?!").
extras->domPathPrefix.AssignLiteral("explicit/workers/?!/");
MOZ_ASSERT(StartsWithExplicit(extras->jsPathPrefix));
MOZ_ASSERT(StartsWithExplicit(extras->domPathPrefix));
extras->location = nullptr;
aCompartmentStats->extra = extras;
}
};
class MessagePortRunnable final : public WorkerRunnable
{
MessagePortIdentifier mPortIdentifier;
public:
MessagePortRunnable(WorkerPrivate* aWorkerPrivate,
MessagePort* aPort)
: WorkerRunnable(aWorkerPrivate, WorkerThreadModifyBusyCount)
{
MOZ_ASSERT(aPort);
// In order to move the port from one thread to another one, we have to
// close and disentangle it. The output will be a MessagePortIdentifier that
// will be used to recreate a new MessagePort on the other thread.
aPort->CloneAndDisentangle(mPortIdentifier);
}
private:
~MessagePortRunnable()
{ }
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
return aWorkerPrivate->ConnectMessagePort(aCx, mPortIdentifier);
}
NS_IMETHOD
Cancel() override
{
MessagePort::ForceClose(mPortIdentifier);
return WorkerRunnable::Cancel();
}
};
class DummyRunnable final
: public WorkerRunnable
{
public:
explicit
DummyRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{
aWorkerPrivate->AssertIsOnWorkerThread();
}
private:
~DummyRunnable()
{
mWorkerPrivate->AssertIsOnWorkerThread();
}
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
MOZ_ASSERT_UNREACHABLE("Should never call Dispatch on this!");
return true;
}
virtual void
PostDispatch(JSContext* aCx,
WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) override
{
MOZ_ASSERT_UNREACHABLE("Should never call Dispatch on this!");
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
// Do nothing.
return true;
}
};
PRThread*
PRThreadFromThread(nsIThread* aThread)
{
MOZ_ASSERT(aThread);
PRThread* result;
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(aThread->GetPRThread(&result)));
MOZ_ASSERT(result);
return result;
}
} /* anonymous namespace */
NS_IMPL_ISUPPORTS_INHERITED0(MainThreadReleaseRunnable, nsRunnable)
NS_IMPL_ISUPPORTS_INHERITED0(TopLevelWorkerFinishedRunnable, nsRunnable)
TimerThreadEventTarget::TimerThreadEventTarget(WorkerPrivate* aWorkerPrivate,
WorkerRunnable* aWorkerRunnable)
: mWorkerPrivate(aWorkerPrivate), mWorkerRunnable(aWorkerRunnable)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aWorkerRunnable);
}
TimerThreadEventTarget::~TimerThreadEventTarget()
{
}
NS_IMETHODIMP
TimerThreadEventTarget::DispatchFromScript(nsIRunnable* aRunnable, uint32_t aFlags)
{
nsCOMPtr<nsIRunnable> runnable(aRunnable);
return Dispatch(runnable.forget(), aFlags);
}
NS_IMETHODIMP
TimerThreadEventTarget::Dispatch(already_AddRefed<nsIRunnable>&& aRunnable, uint32_t aFlags)
{
// This should only happen on the timer thread.
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aFlags == nsIEventTarget::DISPATCH_NORMAL);
RefPtr<TimerThreadEventTarget> kungFuDeathGrip = this;
// Run the runnable we're given now (should just call DummyCallback()),
// otherwise the timer thread will leak it... If we run this after
// dispatch running the event can race against resetting the timer.
nsCOMPtr<nsIRunnable> runnable(aRunnable);
runnable->Run();
// This can fail if we're racing to terminate or cancel, should be handled
// by the terminate or cancel code.
mWorkerRunnable->Dispatch(nullptr);
return NS_OK;
}
NS_IMETHODIMP
TimerThreadEventTarget::IsOnCurrentThread(bool* aIsOnCurrentThread)
{
MOZ_ASSERT(aIsOnCurrentThread);
nsresult rv = mWorkerPrivate->IsOnCurrentThread(aIsOnCurrentThread);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMPL_ISUPPORTS(TimerThreadEventTarget, nsIEventTarget)
WorkerLoadInfo::WorkerLoadInfo()
: mWindowID(UINT64_MAX)
, mServiceWorkerID(0)
, mFromWindow(false)
, mEvalAllowed(false)
, mReportCSPViolations(false)
, mXHRParamsAllowed(false)
, mPrincipalIsSystem(false)
, mIsInPrivilegedApp(false)
, mIsInCertifiedApp(false)
, mStorageAllowed(false)
, mPrivateBrowsing(true)
, mServiceWorkersTestingInWindow(false)
{
MOZ_COUNT_CTOR(WorkerLoadInfo);
}
WorkerLoadInfo::~WorkerLoadInfo()
{
MOZ_COUNT_DTOR(WorkerLoadInfo);
}
void
WorkerLoadInfo::StealFrom(WorkerLoadInfo& aOther)
{
MOZ_ASSERT(!mBaseURI);
aOther.mBaseURI.swap(mBaseURI);
MOZ_ASSERT(!mResolvedScriptURI);
aOther.mResolvedScriptURI.swap(mResolvedScriptURI);
MOZ_ASSERT(!mPrincipal);
aOther.mPrincipal.swap(mPrincipal);
MOZ_ASSERT(!mScriptContext);
aOther.mScriptContext.swap(mScriptContext);
MOZ_ASSERT(!mWindow);
aOther.mWindow.swap(mWindow);
MOZ_ASSERT(!mCSP);
aOther.mCSP.swap(mCSP);
MOZ_ASSERT(!mChannel);
aOther.mChannel.swap(mChannel);
MOZ_ASSERT(!mLoadGroup);
aOther.mLoadGroup.swap(mLoadGroup);
MOZ_ASSERT(!mLoadFailedAsyncRunnable);
aOther.mLoadFailedAsyncRunnable.swap(mLoadFailedAsyncRunnable);
MOZ_ASSERT(!mInterfaceRequestor);
aOther.mInterfaceRequestor.swap(mInterfaceRequestor);
MOZ_ASSERT(!mPrincipalInfo);
mPrincipalInfo = aOther.mPrincipalInfo.forget();
mDomain = aOther.mDomain;
mServiceWorkerCacheName = aOther.mServiceWorkerCacheName;
mWindowID = aOther.mWindowID;
mServiceWorkerID = aOther.mServiceWorkerID;
mFromWindow = aOther.mFromWindow;
mEvalAllowed = aOther.mEvalAllowed;
mReportCSPViolations = aOther.mReportCSPViolations;
mXHRParamsAllowed = aOther.mXHRParamsAllowed;
mPrincipalIsSystem = aOther.mPrincipalIsSystem;
mIsInPrivilegedApp = aOther.mIsInPrivilegedApp;
mIsInCertifiedApp = aOther.mIsInCertifiedApp;
mStorageAllowed = aOther.mStorageAllowed;
mPrivateBrowsing = aOther.mPrivateBrowsing;
mServiceWorkersTestingInWindow = aOther.mServiceWorkersTestingInWindow;
}
template <class Derived>
class WorkerPrivateParent<Derived>::EventTarget final
: public nsIEventTarget
{
// This mutex protects mWorkerPrivate and must be acquired *before* the
// WorkerPrivate's mutex whenever they must both be held.
mozilla::Mutex mMutex;
WorkerPrivate* mWorkerPrivate;
nsIEventTarget* mWeakNestedEventTarget;
nsCOMPtr<nsIEventTarget> mNestedEventTarget;
public:
explicit EventTarget(WorkerPrivate* aWorkerPrivate)
: mMutex("WorkerPrivateParent::EventTarget::mMutex"),
mWorkerPrivate(aWorkerPrivate), mWeakNestedEventTarget(nullptr)
{
MOZ_ASSERT(aWorkerPrivate);
}
EventTarget(WorkerPrivate* aWorkerPrivate, nsIEventTarget* aNestedEventTarget)
: mMutex("WorkerPrivateParent::EventTarget::mMutex"),
mWorkerPrivate(aWorkerPrivate), mWeakNestedEventTarget(aNestedEventTarget),
mNestedEventTarget(aNestedEventTarget)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aNestedEventTarget);
}
void
Disable()
{
nsCOMPtr<nsIEventTarget> nestedEventTarget;
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(mWorkerPrivate);
mWorkerPrivate = nullptr;
mNestedEventTarget.swap(nestedEventTarget);
}
}
nsIEventTarget*
GetWeakNestedEventTarget() const
{
MOZ_ASSERT(mWeakNestedEventTarget);
return mWeakNestedEventTarget;
}
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIEVENTTARGET
private:
~EventTarget()
{ }
};
WorkerLoadInfo::
InterfaceRequestor::InterfaceRequestor(nsIPrincipal* aPrincipal,
nsILoadGroup* aLoadGroup)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aPrincipal);
// Look for an existing LoadContext. This is optional and it's ok if
// we don't find one.
nsCOMPtr<nsILoadContext> baseContext;
if (aLoadGroup) {
nsCOMPtr<nsIInterfaceRequestor> callbacks;
aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
callbacks->GetInterface(NS_GET_IID(nsILoadContext),
getter_AddRefs(baseContext));
}
mOuterRequestor = callbacks;
}
mLoadContext = new LoadContext(aPrincipal, baseContext);
}
void
WorkerLoadInfo::
InterfaceRequestor::MaybeAddTabChild(nsILoadGroup* aLoadGroup)
{
MOZ_ASSERT(NS_IsMainThread());
if (!aLoadGroup) {
return;
}
nsCOMPtr<nsIInterfaceRequestor> callbacks;
aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (!callbacks) {
return;
}
nsCOMPtr<nsITabChild> tabChild;
callbacks->GetInterface(NS_GET_IID(nsITabChild), getter_AddRefs(tabChild));
if (!tabChild) {
return;
}
// Use weak references to the tab child. Holding a strong reference will
// not prevent an ActorDestroy() from being called on the TabChild.
// Therefore, we should let the TabChild destroy itself as soon as possible.
mTabChildList.AppendElement(do_GetWeakReference(tabChild));
}
NS_IMETHODIMP
WorkerLoadInfo::
InterfaceRequestor::GetInterface(const nsIID& aIID, void** aSink)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mLoadContext);
if (aIID.Equals(NS_GET_IID(nsILoadContext))) {
nsCOMPtr<nsILoadContext> ref = mLoadContext;
ref.forget(aSink);
return NS_OK;
}
// If we still have an active nsITabChild, then return it. Its possible,
// though, that all of the TabChild objects have been destroyed. In that
// case we return NS_NOINTERFACE.
if (aIID.Equals(NS_GET_IID(nsITabChild))) {
nsCOMPtr<nsITabChild> tabChild = GetAnyLiveTabChild();
if (!tabChild) {
return NS_NOINTERFACE;
}
tabChild.forget(aSink);
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsINetworkInterceptController)) &&
mOuterRequestor) {
// If asked for the network intercept controller, ask the outer requestor,
// which could be the docshell.
return mOuterRequestor->GetInterface(aIID, aSink);
}
return NS_NOINTERFACE;
}
already_AddRefed<nsITabChild>
WorkerLoadInfo::
InterfaceRequestor::GetAnyLiveTabChild()
{
MOZ_ASSERT(NS_IsMainThread());
// Search our list of known TabChild objects for one that still exists.
while (!mTabChildList.IsEmpty()) {
nsCOMPtr<nsITabChild> tabChild =
do_QueryReferent(mTabChildList.LastElement());
// Does this tab child still exist? If so, return it. We are done. If the
// PBrowser actor is no longer useful, don't bother returning this tab.
if (tabChild && !static_cast<TabChild*>(tabChild.get())->IsDestroyed()) {
return tabChild.forget();
}
// Otherwise remove the stale weak reference and check the next one
mTabChildList.RemoveElementAt(mTabChildList.Length() - 1);
}
return nullptr;
}
NS_IMPL_ADDREF(WorkerLoadInfo::InterfaceRequestor)
NS_IMPL_RELEASE(WorkerLoadInfo::InterfaceRequestor)
NS_IMPL_QUERY_INTERFACE(WorkerLoadInfo::InterfaceRequestor, nsIInterfaceRequestor)
struct WorkerPrivate::TimeoutInfo
{
TimeoutInfo()
: mTimeoutCallable(JS::UndefinedValue()), mLineNumber(0), mId(0),
mIsInterval(false), mCanceled(false)
{
MOZ_COUNT_CTOR(mozilla::dom::workers::WorkerPrivate::TimeoutInfo);
}
~TimeoutInfo()
{
MOZ_COUNT_DTOR(mozilla::dom::workers::WorkerPrivate::TimeoutInfo);
}
bool operator==(const TimeoutInfo& aOther)
{
return mTargetTime == aOther.mTargetTime;
}
bool operator<(const TimeoutInfo& aOther)
{
return mTargetTime < aOther.mTargetTime;
}
JS::Heap<JS::Value> mTimeoutCallable;
nsString mTimeoutString;
nsTArray<JS::Heap<JS::Value> > mExtraArgVals;
mozilla::TimeStamp mTargetTime;
mozilla::TimeDuration mInterval;
nsCString mFilename;
uint32_t mLineNumber;
int32_t mId;
bool mIsInterval;
bool mCanceled;
};
class WorkerPrivate::MemoryReporter final : public nsIMemoryReporter
{
NS_DECL_THREADSAFE_ISUPPORTS
friend class WorkerPrivate;
SharedMutex mMutex;
WorkerPrivate* mWorkerPrivate;
bool mAlreadyMappedToAddon;
public:
explicit MemoryReporter(WorkerPrivate* aWorkerPrivate)
: mMutex(aWorkerPrivate->mMutex), mWorkerPrivate(aWorkerPrivate),
mAlreadyMappedToAddon(false)
{
aWorkerPrivate->AssertIsOnWorkerThread();
}
NS_IMETHOD
CollectReports(nsIMemoryReporterCallback* aCallback,
nsISupports* aClosure, bool aAnonymize) override
{
AssertIsOnMainThread();
// Assumes that WorkerJSRuntimeStats will hold a reference to |path|, and
// not a copy, as TryToMapAddon() may later modify it.
nsCString path;
WorkerJSRuntimeStats rtStats(path);
{
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
// Returning NS_OK here will effectively report 0 memory.
return NS_OK;
}
path.AppendLiteral("explicit/workers/workers(");
if (aAnonymize && !mWorkerPrivate->Domain().IsEmpty()) {
path.AppendLiteral("<anonymized-domain>)/worker(<anonymized-url>");
} else {
nsCString escapedDomain(mWorkerPrivate->Domain());
if (escapedDomain.IsEmpty()) {
escapedDomain += "chrome";
} else {
escapedDomain.ReplaceChar('/', '\\');
}
path.Append(escapedDomain);
path.AppendLiteral(")/worker(");
NS_ConvertUTF16toUTF8 escapedURL(mWorkerPrivate->ScriptURL());
escapedURL.ReplaceChar('/', '\\');
path.Append(escapedURL);
}
path.AppendPrintf(", 0x%p)/", static_cast<void*>(mWorkerPrivate));
TryToMapAddon(path);
if (!mWorkerPrivate->BlockAndCollectRuntimeStats(&rtStats, aAnonymize)) {
// Returning NS_OK here will effectively report 0 memory.
return NS_OK;
}
}
return xpc::ReportJSRuntimeExplicitTreeStats(rtStats, path,
aCallback, aClosure,
aAnonymize);
}
private:
~MemoryReporter()
{ }
void
Disable()
{
// Called from WorkerPrivate::DisableMemoryReporter.
mMutex.AssertCurrentThreadOwns();
NS_ASSERTION(mWorkerPrivate, "Disabled more than once!");
mWorkerPrivate = nullptr;
}
// Only call this from the main thread and under mMutex lock.
void
TryToMapAddon(nsACString &path)
{
AssertIsOnMainThread();
mMutex.AssertCurrentThreadOwns();
if (mAlreadyMappedToAddon || !mWorkerPrivate) {
return;
}
nsCOMPtr<nsIURI> scriptURI;
if (NS_FAILED(NS_NewURI(getter_AddRefs(scriptURI),
mWorkerPrivate->ScriptURL()))) {
return;
}
mAlreadyMappedToAddon = true;
if (!XRE_IsParentProcess()) {
// Only try to access the service from the main process.
return;
}
nsAutoCString addonId;
bool ok;
nsCOMPtr<amIAddonManager> addonManager =
do_GetService("@mozilla.org/addons/integration;1");
if (!addonManager ||
NS_FAILED(addonManager->MapURIToAddonID(scriptURI, addonId, &ok)) ||
!ok) {
return;
}
static const size_t explicitLength = strlen("explicit/");
addonId.Insert(NS_LITERAL_CSTRING("add-ons/"), 0);
addonId += "/";
path.Insert(addonId, explicitLength);
}
};
NS_IMPL_ISUPPORTS(WorkerPrivate::MemoryReporter, nsIMemoryReporter)
WorkerPrivate::SyncLoopInfo::SyncLoopInfo(EventTarget* aEventTarget)
: mEventTarget(aEventTarget), mCompleted(false), mResult(false)
#ifdef DEBUG
, mHasRun(false)
#endif
{
}
template <class Derived>
nsIDocument*
WorkerPrivateParent<Derived>::GetDocument() const
{
AssertIsOnMainThread();
if (mLoadInfo.mWindow) {
return mLoadInfo.mWindow->GetExtantDoc();
}
// if we don't have a document, we should query the document
// from the parent in case of a nested worker
WorkerPrivate* parent = mParent;
while (parent) {
if (parent->mLoadInfo.mWindow) {
return parent->mLoadInfo.mWindow->GetExtantDoc();
}
parent = parent->GetParent();
}
// couldn't query a document, give up and return nullptr
return nullptr;
}
// Can't use NS_IMPL_CYCLE_COLLECTION_CLASS(WorkerPrivateParent) because of the
// templates.
template <class Derived>
typename WorkerPrivateParent<Derived>::cycleCollection
WorkerPrivateParent<Derived>::_cycleCollectorGlobal =
WorkerPrivateParent<Derived>::cycleCollection();
template <class Derived>
WorkerPrivateParent<Derived>::WorkerPrivateParent(
JSContext* aCx,
WorkerPrivate* aParent,
const nsAString& aScriptURL,
bool aIsChromeWorker,
WorkerType aWorkerType,
const nsACString& aWorkerName,
WorkerLoadInfo& aLoadInfo)
: mMutex("WorkerPrivateParent Mutex"),
mCondVar(mMutex, "WorkerPrivateParent CondVar"),
mMemoryReportCondVar(mMutex, "WorkerPrivateParent Memory Report CondVar"),
mParent(aParent), mScriptURL(aScriptURL),
mWorkerName(aWorkerName), mLoadingWorkerScript(false),
mBusyCount(0), mParentStatus(Pending), mParentFrozen(false),
mParentSuspended(false), mIsChromeWorker(aIsChromeWorker),
mMainThreadObjectsForgotten(false), mWorkerType(aWorkerType),
mCreationTimeStamp(TimeStamp::Now()),
mCreationTimeHighRes((double)PR_Now() / PR_USEC_PER_MSEC)
{
MOZ_ASSERT_IF(!IsDedicatedWorker(),
!aWorkerName.IsVoid() && NS_IsMainThread());
MOZ_ASSERT_IF(IsDedicatedWorker(), aWorkerName.IsEmpty());
if (aLoadInfo.mWindow) {
AssertIsOnMainThread();
MOZ_ASSERT(aLoadInfo.mWindow->IsInnerWindow(),
"Should have inner window here!");
BindToOwner(aLoadInfo.mWindow);
}
mLoadInfo.StealFrom(aLoadInfo);
if (aParent) {
aParent->AssertIsOnWorkerThread();
aParent->CopyJSSettings(mJSSettings);
MOZ_ASSERT(IsDedicatedWorker());
}
else {
AssertIsOnMainThread();
RuntimeService::GetDefaultJSSettings(mJSSettings);
}
}
template <class Derived>
WorkerPrivateParent<Derived>::~WorkerPrivateParent()
{
DropJSObjects(this);
}
template <class Derived>
JSObject*
WorkerPrivateParent<Derived>::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
MOZ_ASSERT(!IsSharedWorker(),
"We should never wrap a WorkerPrivate for a SharedWorker");
AssertIsOnParentThread();
// XXXkhuey this should not need to be rooted, the analysis is dumb.
// See bug 980181.
JS::Rooted<JSObject*> wrapper(aCx,
WorkerBinding::Wrap(aCx, ParentAsWorkerPrivate(), aGivenProto));
if (wrapper) {
MOZ_ALWAYS_TRUE(TryPreserveWrapper(wrapper));
}
return wrapper;
}
template <class Derived>
nsresult
WorkerPrivateParent<Derived>::DispatchPrivate(already_AddRefed<WorkerRunnable>&& aRunnable,
nsIEventTarget* aSyncLoopTarget)
{
// May be called on any thread!
RefPtr<WorkerRunnable> runnable(aRunnable);
WorkerPrivate* self = ParentAsWorkerPrivate();
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT_IF(aSyncLoopTarget, self->mThread);
if (!self->mThread) {
if (ParentStatus() == Pending || self->mStatus == Pending) {
mPreStartRunnables.AppendElement(runnable);
return NS_OK;
}
NS_WARNING("Using a worker event target after the thread has already"
"been released!");
return NS_ERROR_UNEXPECTED;
}
if (self->mStatus == Dead ||
(!aSyncLoopTarget && ParentStatus() > Running)) {
NS_WARNING("A runnable was posted to a worker that is already shutting "
"down!");
return NS_ERROR_UNEXPECTED;
}
nsresult rv;
if (aSyncLoopTarget) {
rv = aSyncLoopTarget->Dispatch(runnable.forget(), NS_DISPATCH_NORMAL);
} else {
rv = self->mThread->DispatchAnyThread(WorkerThreadFriendKey(), runnable.forget());
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mCondVar.Notify();
}
return NS_OK;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::EnableDebugger()
{
AssertIsOnParentThread();
WorkerPrivate* self = ParentAsWorkerPrivate();
if (NS_FAILED(RegisterWorkerDebugger(self))) {
NS_WARNING("Failed to register worker debugger!");
return;
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::DisableDebugger()
{
AssertIsOnParentThread();
WorkerPrivate* self = ParentAsWorkerPrivate();
if (NS_FAILED(UnregisterWorkerDebugger(self))) {
NS_WARNING("Failed to unregister worker debugger!");
}
}
template <class Derived>
nsresult
WorkerPrivateParent<Derived>::DispatchControlRunnable(
already_AddRefed<WorkerControlRunnable>&& aWorkerControlRunnable)
{
// May be called on any thread!
RefPtr<WorkerControlRunnable> runnable(aWorkerControlRunnable);
MOZ_ASSERT(runnable);
WorkerPrivate* self = ParentAsWorkerPrivate();
{
MutexAutoLock lock(mMutex);
if (self->mStatus == Dead) {
NS_WARNING("A control runnable was posted to a worker that is already "
"shutting down!");
return NS_ERROR_UNEXPECTED;
}
// Transfer ownership to the control queue.
self->mControlQueue.Push(runnable.forget().take());
if (JSContext* cx = self->mJSContext) {
MOZ_ASSERT(self->mThread);
JSRuntime* rt = JS_GetRuntime(cx);
MOZ_ASSERT(rt);
JS_RequestInterruptCallback(rt);
}
mCondVar.Notify();
}
return NS_OK;
}
template <class Derived>
nsresult
WorkerPrivateParent<Derived>::DispatchDebuggerRunnable(
already_AddRefed<WorkerRunnable>&& aDebuggerRunnable)
{
// May be called on any thread!
RefPtr<WorkerRunnable> runnable(aDebuggerRunnable);
MOZ_ASSERT(runnable);
WorkerPrivate* self = ParentAsWorkerPrivate();
{
MutexAutoLock lock(mMutex);
if (self->mStatus == Dead) {
NS_WARNING("A debugger runnable was posted to a worker that is already "
"shutting down!");
return NS_ERROR_UNEXPECTED;
}
// Transfer ownership to the debugger queue.
self->mDebuggerQueue.Push(runnable.forget().take());
mCondVar.Notify();
}
return NS_OK;
}
template <class Derived>
already_AddRefed<WorkerRunnable>
WorkerPrivateParent<Derived>::MaybeWrapAsWorkerRunnable(already_AddRefed<nsIRunnable>&& aRunnable)
{
// May be called on any thread!
nsCOMPtr<nsIRunnable> runnable(aRunnable);
MOZ_ASSERT(runnable);
RefPtr<WorkerRunnable> workerRunnable =
WorkerRunnable::FromRunnable(runnable);
if (workerRunnable) {
return workerRunnable.forget();
}
nsCOMPtr<nsICancelableRunnable> cancelable = do_QueryInterface(runnable);
if (!cancelable) {
MOZ_CRASH("All runnables destined for a worker thread must be cancelable!");
}
workerRunnable =
new ExternalRunnableWrapper(ParentAsWorkerPrivate(), cancelable);
return workerRunnable.forget();
}
template <class Derived>
already_AddRefed<nsIEventTarget>
WorkerPrivateParent<Derived>::GetEventTarget()
{
WorkerPrivate* self = ParentAsWorkerPrivate();
nsCOMPtr<nsIEventTarget> target;
{
MutexAutoLock lock(mMutex);
if (!mEventTarget &&
ParentStatus() <= Running &&
self->mStatus <= Running) {
mEventTarget = new EventTarget(self);
}
target = mEventTarget;
}
NS_WARN_IF_FALSE(target,
"Requested event target for a worker that is already "
"shutting down!");
return target.forget();
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Start()
{
// May be called on any thread!
{
MutexAutoLock lock(mMutex);
NS_ASSERTION(mParentStatus != Running, "How can this be?!");
if (mParentStatus == Pending) {
mParentStatus = Running;
return true;
}
}
return false;
}
// aCx is null when called from the finalizer
template <class Derived>
bool
WorkerPrivateParent<Derived>::NotifyPrivate(JSContext* aCx, Status aStatus)
{
AssertIsOnParentThread();
bool pending;
{
MutexAutoLock lock(mMutex);
if (mParentStatus >= aStatus) {
return true;
}
pending = mParentStatus == Pending;
mParentStatus = aStatus;
}
if (IsSharedWorker()) {
RuntimeService* runtime = RuntimeService::GetService();
MOZ_ASSERT(runtime);
runtime->ForgetSharedWorker(ParentAsWorkerPrivate());
}
if (pending) {
WorkerPrivate* self = ParentAsWorkerPrivate();
#ifdef DEBUG
{
// Fake a thread here just so that our assertions don't go off for no
// reason.
nsIThread* currentThread = NS_GetCurrentThread();
MOZ_ASSERT(currentThread);
MOZ_ASSERT(!self->mPRThread);
self->mPRThread = PRThreadFromThread(currentThread);
MOZ_ASSERT(self->mPRThread);
}
#endif
// Worker never got a chance to run, go ahead and delete it.
self->ScheduleDeletion(WorkerPrivate::WorkerNeverRan);
return true;
}
NS_ASSERTION(aStatus != Terminating || mQueuedRunnables.IsEmpty(),
"Shouldn't have anything queued!");
// Anything queued will be discarded.
mQueuedRunnables.Clear();
RefPtr<NotifyRunnable> runnable =
new NotifyRunnable(ParentAsWorkerPrivate(), aStatus);
return runnable->Dispatch(aCx);
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Freeze(JSContext* aCx, nsPIDOMWindow* aWindow)
{
AssertIsOnParentThread();
MOZ_ASSERT(aCx);
// Shared workers are only frozen if all of their owning documents are
// frozen. It can happen that mSharedWorkers is empty but this thread has
// not been unregistered yet.
if ((IsSharedWorker() || IsServiceWorker()) && !mSharedWorkers.IsEmpty()) {
AssertIsOnMainThread();
bool allFrozen = false;
for (uint32_t i = 0; i < mSharedWorkers.Length(); ++i) {
if (aWindow && mSharedWorkers[i]->GetOwner() == aWindow) {
// Calling Freeze() may change the refcount, ensure that the worker
// outlives this call.
RefPtr<SharedWorker> kungFuDeathGrip = mSharedWorkers[i];
mSharedWorkers[i]->Freeze();
} else {
MOZ_ASSERT_IF(mSharedWorkers[i]->GetOwner() && aWindow,
!SameCOMIdentity(mSharedWorkers[i]->GetOwner(),
aWindow));
if (!mSharedWorkers[i]->IsFrozen()) {
allFrozen = false;
}
}
}
if (!allFrozen || mParentFrozen) {
return true;
}
}
mParentFrozen = true;
{
MutexAutoLock lock(mMutex);
if (mParentStatus >= Terminating) {
return true;
}
}
DisableDebugger();
RefPtr<FreezeRunnable> runnable =
new FreezeRunnable(ParentAsWorkerPrivate());
if (!runnable->Dispatch(aCx)) {
return false;
}
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Thaw(JSContext* aCx, nsPIDOMWindow* aWindow)
{
AssertIsOnParentThread();
MOZ_ASSERT(aCx);
if (IsDedicatedWorker() && !mParentFrozen) {
// If we are in here, it means that this worker has been created when the
// parent was actually suspended (maybe during a sync XHR), and in this case
// we don't need to thaw.
return true;
}
// Shared workers are resumed if any of their owning documents are thawed.
// It can happen that mSharedWorkers is empty but this thread has not been
// unregistered yet.
if ((IsSharedWorker() || IsServiceWorker()) && !mSharedWorkers.IsEmpty()) {
AssertIsOnMainThread();
bool anyRunning = false;
for (uint32_t i = 0; i < mSharedWorkers.Length(); ++i) {
if (aWindow && mSharedWorkers[i]->GetOwner() == aWindow) {
// Calling Thaw() may change the refcount, ensure that the worker
// outlives this call.
RefPtr<SharedWorker> kungFuDeathGrip = mSharedWorkers[i];
mSharedWorkers[i]->Thaw();
anyRunning = true;
} else {
MOZ_ASSERT_IF(mSharedWorkers[i]->GetOwner() && aWindow,
!SameCOMIdentity(mSharedWorkers[i]->GetOwner(),
aWindow));
if (!mSharedWorkers[i]->IsFrozen()) {
anyRunning = true;
}
}
}
if (!anyRunning || !mParentFrozen) {
return true;
}
}
MOZ_ASSERT(mParentFrozen);
mParentFrozen = false;
{
MutexAutoLock lock(mMutex);
if (mParentStatus >= Terminating) {
return true;
}
}
EnableDebugger();
// Execute queued runnables before waking up the worker, otherwise the worker
// could post new messages before we run those that have been queued.
if (!IsSuspended() && !mQueuedRunnables.IsEmpty()) {
AssertIsOnMainThread();
MOZ_ASSERT(IsDedicatedWorker());
nsTArray<nsCOMPtr<nsIRunnable>> runnables;
mQueuedRunnables.SwapElements(runnables);
for (uint32_t index = 0; index < runnables.Length(); index++) {
runnables[index]->Run();
}
}
RefPtr<ThawRunnable> runnable =
new ThawRunnable(ParentAsWorkerPrivate());
if (!runnable->Dispatch(aCx)) {
return false;
}
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::Suspend()
{
AssertIsOnMainThread();
MOZ_ASSERT(!mParentSuspended, "Suspended more than once!");
mParentSuspended = true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::Resume()
{
AssertIsOnMainThread();
MOZ_ASSERT(mParentSuspended, "Resumed more than once!");
mParentSuspended = false;
{
MutexAutoLock lock(mMutex);
if (mParentStatus >= Terminating) {
return;
}
}
// Execute queued runnables before waking up, otherwise the worker could post
// new messages before we run those that have been queued.
if (!IsFrozen() && !mQueuedRunnables.IsEmpty()) {
AssertIsOnMainThread();
MOZ_ASSERT(IsDedicatedWorker());
nsTArray<nsCOMPtr<nsIRunnable>> runnables;
mQueuedRunnables.SwapElements(runnables);
for (uint32_t index = 0; index < runnables.Length(); index++) {
runnables[index]->Run();
}
}
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Close()
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
if (mParentStatus < Closing) {
mParentStatus = Closing;
}
}
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::ModifyBusyCount(JSContext* aCx, bool aIncrease)
{
AssertIsOnParentThread();
NS_ASSERTION(aIncrease || mBusyCount, "Mismatched busy count mods!");
if (aIncrease) {
mBusyCount++;
return true;
}
if (--mBusyCount == 0) {
bool shouldCancel;
{
MutexAutoLock lock(mMutex);
shouldCancel = mParentStatus == Terminating;
}
if (shouldCancel && !Cancel(aCx)) {
return false;
}
}
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::ForgetOverridenLoadGroup(
nsCOMPtr<nsILoadGroup>& aLoadGroupOut)
{
AssertIsOnParentThread();
// If we're not overriden, then do nothing here. Let the load group get
// handled in ForgetMainThreadObjects().
if (!mLoadInfo.mInterfaceRequestor) {
return;
}
mLoadInfo.mLoadGroup.swap(aLoadGroupOut);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::ForgetMainThreadObjects(
nsTArray<nsCOMPtr<nsISupports> >& aDoomed)
{
AssertIsOnParentThread();
MOZ_ASSERT(!mMainThreadObjectsForgotten);
static const uint32_t kDoomedCount = 10;
aDoomed.SetCapacity(kDoomedCount);
SwapToISupportsArray(mLoadInfo.mWindow, aDoomed);
SwapToISupportsArray(mLoadInfo.mScriptContext, aDoomed);
SwapToISupportsArray(mLoadInfo.mBaseURI, aDoomed);
SwapToISupportsArray(mLoadInfo.mResolvedScriptURI, aDoomed);
SwapToISupportsArray(mLoadInfo.mPrincipal, aDoomed);
SwapToISupportsArray(mLoadInfo.mChannel, aDoomed);
SwapToISupportsArray(mLoadInfo.mCSP, aDoomed);
SwapToISupportsArray(mLoadInfo.mLoadGroup, aDoomed);
SwapToISupportsArray(mLoadInfo.mLoadFailedAsyncRunnable, aDoomed);
SwapToISupportsArray(mLoadInfo.mInterfaceRequestor, aDoomed);
// Before adding anything here update kDoomedCount above!
MOZ_ASSERT(aDoomed.Length() == kDoomedCount);
mMainThreadObjectsForgotten = true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::PostMessageInternal(
JSContext* aCx,
JS::Handle<JS::Value> aMessage,
const Optional<Sequence<JS::Value>>& aTransferable,
UniquePtr<ServiceWorkerClientInfo>&& aClientInfo,
ErrorResult& aRv)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
if (mParentStatus > Running) {
return;
}
}
JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
if (aTransferable.WasPassed()) {
const Sequence<JS::Value>& realTransferable = aTransferable.Value();
// The input sequence only comes from the generated bindings code, which
// ensures it is rooted.
JS::HandleValueArray elements =
JS::HandleValueArray::fromMarkedLocation(realTransferable.Length(),
realTransferable.Elements());
JSObject* array =
JS_NewArrayObject(aCx, elements);
if (!array) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
transferable.setObject(*array);
}
RefPtr<MessageEventRunnable> runnable =
new MessageEventRunnable(ParentAsWorkerPrivate(),
WorkerRunnable::WorkerThreadModifyBusyCount);
UniquePtr<AbstractTimelineMarker> start;
UniquePtr<AbstractTimelineMarker> end;
RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
bool isTimelineRecording = timelines && !timelines->IsEmpty();
if (isTimelineRecording) {
start = MakeUnique<WorkerTimelineMarker>(NS_IsMainThread()
? ProfileTimelineWorkerOperationType::SerializeDataOnMainThread
: ProfileTimelineWorkerOperationType::SerializeDataOffMainThread,
MarkerTracingType::START);
}
runnable->Write(aCx, aMessage, transferable, aRv);
if (isTimelineRecording) {
end = MakeUnique<WorkerTimelineMarker>(NS_IsMainThread()
? ProfileTimelineWorkerOperationType::SerializeDataOnMainThread
: ProfileTimelineWorkerOperationType::SerializeDataOffMainThread,
MarkerTracingType::END);
timelines->AddMarkerForAllObservedDocShells(start);
timelines->AddMarkerForAllObservedDocShells(end);
}
if (NS_WARN_IF(aRv.Failed())) {
return;
}
runnable->SetMessageSource(Move(aClientInfo));
if (!runnable->Dispatch(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::PostMessage(
JSContext* aCx, JS::Handle<JS::Value> aMessage,
const Optional<Sequence<JS::Value>>& aTransferable,
ErrorResult& aRv)
{
PostMessageInternal(aCx, aMessage, aTransferable, nullptr, aRv);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::PostMessageToServiceWorker(
JSContext* aCx, JS::Handle<JS::Value> aMessage,
const Optional<Sequence<JS::Value>>& aTransferable,
UniquePtr<ServiceWorkerClientInfo>&& aClientInfo,
ErrorResult& aRv)
{
AssertIsOnMainThread();
PostMessageInternal(aCx, aMessage, aTransferable, Move(aClientInfo), aRv);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateRuntimeOptions(
JSContext* aCx,
const JS::RuntimeOptions& aRuntimeOptions)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
mJSSettings.runtimeOptions = aRuntimeOptions;
}
RefPtr<UpdateRuntimeOptionsRunnable> runnable =
new UpdateRuntimeOptionsRunnable(ParentAsWorkerPrivate(), aRuntimeOptions);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker context options!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdatePreference(JSContext* aCx, WorkerPreference aPref, bool aValue)
{
AssertIsOnParentThread();
MOZ_ASSERT(aPref >= 0 && aPref < WORKERPREF_COUNT);
RefPtr<UpdatePreferenceRunnable> runnable =
new UpdatePreferenceRunnable(ParentAsWorkerPrivate(), aPref, aValue);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker preferences!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateLanguages(JSContext* aCx,
const nsTArray<nsString>& aLanguages)
{
AssertIsOnParentThread();
RefPtr<UpdateLanguagesRunnable> runnable =
new UpdateLanguagesRunnable(ParentAsWorkerPrivate(), aLanguages);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker languages!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateJSWorkerMemoryParameter(JSContext* aCx,
JSGCParamKey aKey,
uint32_t aValue)
{
AssertIsOnParentThread();
bool found = false;
{
MutexAutoLock lock(mMutex);
found = mJSSettings.ApplyGCSetting(aKey, aValue);
}
if (found) {
RefPtr<UpdateJSWorkerMemoryParameterRunnable> runnable =
new UpdateJSWorkerMemoryParameterRunnable(ParentAsWorkerPrivate(), aKey,
aValue);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update memory parameter!");
JS_ClearPendingException(aCx);
}
}
}
#ifdef JS_GC_ZEAL
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateGCZeal(JSContext* aCx, uint8_t aGCZeal,
uint32_t aFrequency)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
mJSSettings.gcZeal = aGCZeal;
mJSSettings.gcZealFrequency = aFrequency;
}
RefPtr<UpdateGCZealRunnable> runnable =
new UpdateGCZealRunnable(ParentAsWorkerPrivate(), aGCZeal, aFrequency);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker gczeal!");
JS_ClearPendingException(aCx);
}
}
#endif
template <class Derived>
void
WorkerPrivateParent<Derived>::GarbageCollect(JSContext* aCx, bool aShrinking)
{
AssertIsOnParentThread();
RefPtr<GarbageCollectRunnable> runnable =
new GarbageCollectRunnable(ParentAsWorkerPrivate(), aShrinking,
/* collectChildren = */ true);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to GC worker!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::CycleCollect(JSContext* aCx, bool aDummy)
{
AssertIsOnParentThread();
RefPtr<CycleCollectRunnable> runnable =
new CycleCollectRunnable(ParentAsWorkerPrivate(),
/* collectChildren = */ true);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to CC worker!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::OfflineStatusChangeEvent(JSContext* aCx, bool aIsOffline)
{
AssertIsOnParentThread();
RefPtr<OfflineStatusChangeRunnable> runnable =
new OfflineStatusChangeRunnable(ParentAsWorkerPrivate(), aIsOffline);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to dispatch offline status change event!");
JS_ClearPendingException(aCx);
}
}
void
WorkerPrivate::OfflineStatusChangeEventInternal(JSContext* aCx, bool aIsOffline)
{
AssertIsOnWorkerThread();
// The worker is already in this state. No need to dispatch an event.
if (mOnLine == !aIsOffline) {
return;
}
for (uint32_t index = 0; index < mChildWorkers.Length(); ++index) {
mChildWorkers[index]->OfflineStatusChangeEvent(aCx, aIsOffline);
}
mOnLine = !aIsOffline;
WorkerGlobalScope* globalScope = GlobalScope();
RefPtr<WorkerNavigator> nav = globalScope->GetExistingNavigator();
if (nav) {
nav->SetOnLine(mOnLine);
}
nsString eventType;
if (aIsOffline) {
eventType.AssignLiteral("offline");
} else {
eventType.AssignLiteral("online");
}
RefPtr<Event> event = NS_NewDOMEvent(globalScope, nullptr, nullptr);
event->InitEvent(eventType, false, false);
event->SetTrusted(true);
globalScope->DispatchDOMEvent(nullptr, event, nullptr, nullptr);
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::RegisterSharedWorker(JSContext* aCx,
SharedWorker* aSharedWorker,
MessagePort* aPort)
{
AssertIsOnMainThread();
MOZ_ASSERT(aSharedWorker);
MOZ_ASSERT(IsSharedWorker());
MOZ_ASSERT(!mSharedWorkers.Contains(aSharedWorker));
if (IsSharedWorker()) {
RefPtr<MessagePortRunnable> runnable =
new MessagePortRunnable(ParentAsWorkerPrivate(), aPort);
if (!runnable->Dispatch(aCx)) {
return false;
}
}
mSharedWorkers.AppendElement(aSharedWorker);
// If there were other SharedWorker objects attached to this worker then they
// may all have been frozen and this worker would need to be thawed.
if (mSharedWorkers.Length() > 1 && !Thaw(aCx, nullptr)) {
return false;
}
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::BroadcastErrorToSharedWorkers(
JSContext* aCx,
const nsAString& aMessage,
const nsAString& aFilename,
const nsAString& aLine,
uint32_t aLineNumber,
uint32_t aColumnNumber,
uint32_t aFlags)
{
AssertIsOnMainThread();
nsAutoTArray<RefPtr<SharedWorker>, 10> sharedWorkers;
GetAllSharedWorkers(sharedWorkers);
if (sharedWorkers.IsEmpty()) {
return;
}
nsAutoTArray<WindowAction, 10> windowActions;
nsresult rv;
// First fire the error event at all SharedWorker objects. This may include
// multiple objects in a single window as well as objects in different
// windows.
for (size_t index = 0; index < sharedWorkers.Length(); index++) {
RefPtr<SharedWorker>& sharedWorker = sharedWorkers[index];
// May be null.
nsPIDOMWindow* window = sharedWorker->GetOwner();
RootedDictionary<ErrorEventInit> errorInit(aCx);
errorInit.mBubbles = false;
errorInit.mCancelable = true;
errorInit.mMessage = aMessage;
errorInit.mFilename = aFilename;
errorInit.mLineno = aLineNumber;
errorInit.mColno = aColumnNumber;
RefPtr<ErrorEvent> errorEvent =
ErrorEvent::Constructor(sharedWorker, NS_LITERAL_STRING("error"),
errorInit);
if (!errorEvent) {
ThrowAndReport(window, NS_ERROR_UNEXPECTED);
continue;
}
errorEvent->SetTrusted(true);
bool defaultActionEnabled;
nsresult rv = sharedWorker->DispatchEvent(errorEvent, &defaultActionEnabled);
if (NS_FAILED(rv)) {
ThrowAndReport(window, rv);
continue;
}
if (defaultActionEnabled) {
// Add the owning window to our list so that we will fire an error event
// at it later.
if (!windowActions.Contains(window)) {
windowActions.AppendElement(WindowAction(window));
}
} else {
size_t actionsIndex = windowActions.LastIndexOf(WindowAction(window));
if (actionsIndex != windowActions.NoIndex) {
// Any listener that calls preventDefault() will prevent the window from
// receiving the error event.
windowActions[actionsIndex].mDefaultAction = false;
}
}
}
// If there are no windows to consider further then we're done.
if (windowActions.IsEmpty()) {
return;
}
bool shouldLogErrorToConsole = true;
// Now fire error events at all the windows remaining.
for (uint32_t index = 0; index < windowActions.Length(); index++) {
WindowAction& windowAction = windowActions[index];
// If there is no window or the script already called preventDefault then
// skip this window.
if (!windowAction.mWindow || !windowAction.mDefaultAction) {
continue;
}
nsCOMPtr<nsIScriptGlobalObject> sgo =
do_QueryInterface(windowAction.mWindow);
MOZ_ASSERT(sgo);
MOZ_ASSERT(NS_IsMainThread());
RootedDictionary<ErrorEventInit> init(aCx);
init.mLineno = aLineNumber;
init.mFilename = aFilename;
init.mMessage = aMessage;
init.mCancelable = true;
init.mBubbles = true;
nsEventStatus status = nsEventStatus_eIgnore;
rv = sgo->HandleScriptError(init, &status);
if (NS_FAILED(rv)) {
ThrowAndReport(windowAction.mWindow, rv);
continue;
}
if (status == nsEventStatus_eConsumeNoDefault) {
shouldLogErrorToConsole = false;
}
}
// Finally log a warning in the console if no window tried to prevent it.
if (shouldLogErrorToConsole) {
LogErrorToConsole(aMessage, aFilename, aLine, aLineNumber, aColumnNumber,
aFlags, 0);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::GetAllSharedWorkers(
nsTArray<RefPtr<SharedWorker>>& aSharedWorkers)
{
AssertIsOnMainThread();
MOZ_ASSERT(IsSharedWorker() || IsServiceWorker());
if (!aSharedWorkers.IsEmpty()) {
aSharedWorkers.Clear();
}
for (uint32_t i = 0; i < mSharedWorkers.Length(); ++i) {
aSharedWorkers.AppendElement(mSharedWorkers[i]);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::CloseSharedWorkersForWindow(
nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
MOZ_ASSERT(IsSharedWorker() || IsServiceWorker());
MOZ_ASSERT(aWindow);
bool someRemoved = false;
for (uint32_t i = 0; i < mSharedWorkers.Length();) {
if (mSharedWorkers[i]->GetOwner() == aWindow) {
mSharedWorkers[i]->Close();
mSharedWorkers.RemoveElementAt(i);
someRemoved = true;
} else {
MOZ_ASSERT(!SameCOMIdentity(mSharedWorkers[i]->GetOwner(),
aWindow));
++i;
}
}
if (!someRemoved) {
return;
}
// If there are still SharedWorker objects attached to this worker then they
// may all be frozen and this worker would need to be frozen. Otherwise,
// if that was the last SharedWorker then it's time to cancel this worker.
AutoSafeJSContext cx;
if (!mSharedWorkers.IsEmpty()) {
if (!Freeze(cx, nullptr)) {
JS_ReportPendingException(cx);
}
} else if (!Cancel(cx)) {
JS_ReportPendingException(cx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::CloseAllSharedWorkers()
{
AssertIsOnMainThread();
MOZ_ASSERT(IsSharedWorker() || IsServiceWorker());
for (uint32_t i = 0; i < mSharedWorkers.Length(); ++i) {
mSharedWorkers[i]->Close();
}
mSharedWorkers.Clear();
AutoSafeJSContext cx;
if (!Cancel(cx)) {
JS_ReportPendingException(cx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::WorkerScriptLoaded()
{
AssertIsOnMainThread();
if (IsSharedWorker() || IsServiceWorker()) {
// No longer need to hold references to the window or document we came from.
mLoadInfo.mWindow = nullptr;
mLoadInfo.mScriptContext = nullptr;
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::SetBaseURI(nsIURI* aBaseURI)
{
AssertIsOnMainThread();
if (!mLoadInfo.mBaseURI) {
NS_ASSERTION(GetParent(), "Shouldn't happen without a parent!");
mLoadInfo.mResolvedScriptURI = aBaseURI;
}
mLoadInfo.mBaseURI = aBaseURI;
if (NS_FAILED(aBaseURI->GetSpec(mLocationInfo.mHref))) {
mLocationInfo.mHref.Truncate();
}
mLocationInfo.mHostname.Truncate();
nsContentUtils::GetHostOrIPv6WithBrackets(aBaseURI, mLocationInfo.mHostname);
nsCOMPtr<nsIURL> url(do_QueryInterface(aBaseURI));
if (!url || NS_FAILED(url->GetFilePath(mLocationInfo.mPathname))) {
mLocationInfo.mPathname.Truncate();
}
nsCString temp;
if (url && NS_SUCCEEDED(url->GetQuery(temp)) && !temp.IsEmpty()) {
mLocationInfo.mSearch.Assign('?');
mLocationInfo.mSearch.Append(temp);
}
if (NS_SUCCEEDED(aBaseURI->GetRef(temp)) && !temp.IsEmpty()) {
nsCOMPtr<nsITextToSubURI> converter =
do_GetService(NS_ITEXTTOSUBURI_CONTRACTID);
if (converter && nsContentUtils::GettersDecodeURLHash()) {
nsCString charset;
nsAutoString unicodeRef;
if (NS_SUCCEEDED(aBaseURI->GetOriginCharset(charset)) &&
NS_SUCCEEDED(converter->UnEscapeURIForUI(charset, temp,
unicodeRef))) {
mLocationInfo.mHash.Assign('#');
mLocationInfo.mHash.Append(NS_ConvertUTF16toUTF8(unicodeRef));
}
}
if (mLocationInfo.mHash.IsEmpty()) {
mLocationInfo.mHash.Assign('#');
mLocationInfo.mHash.Append(temp);
}
}
if (NS_SUCCEEDED(aBaseURI->GetScheme(mLocationInfo.mProtocol))) {
mLocationInfo.mProtocol.Append(':');
}
else {
mLocationInfo.mProtocol.Truncate();
}
int32_t port;
if (NS_SUCCEEDED(aBaseURI->GetPort(&port)) && port != -1) {
mLocationInfo.mPort.AppendInt(port);
nsAutoCString host(mLocationInfo.mHostname);
host.Append(':');
host.Append(mLocationInfo.mPort);
mLocationInfo.mHost.Assign(host);
}
else {
mLocationInfo.mHost.Assign(mLocationInfo.mHostname);
}
nsContentUtils::GetUTFOrigin(aBaseURI, mLocationInfo.mOrigin);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::SetPrincipal(nsIPrincipal* aPrincipal,
nsILoadGroup* aLoadGroup)
{
AssertIsOnMainThread();
MOZ_ASSERT(NS_LoadGroupMatchesPrincipal(aLoadGroup, aPrincipal));
MOZ_ASSERT(!mLoadInfo.mPrincipalInfo);
mLoadInfo.mPrincipal = aPrincipal;
mLoadInfo.mPrincipalIsSystem = nsContentUtils::IsSystemPrincipal(aPrincipal);
uint16_t appStatus = aPrincipal->GetAppStatus();
mLoadInfo.mIsInPrivilegedApp =
(appStatus == nsIPrincipal::APP_STATUS_CERTIFIED ||
appStatus == nsIPrincipal::APP_STATUS_PRIVILEGED);
mLoadInfo.mIsInCertifiedApp = (appStatus == nsIPrincipal::APP_STATUS_CERTIFIED);
aPrincipal->GetCsp(getter_AddRefs(mLoadInfo.mCSP));
if (mLoadInfo.mCSP) {
mLoadInfo.mCSP->GetAllowsEval(&mLoadInfo.mReportCSPViolations,
&mLoadInfo.mEvalAllowed);
} else {
mLoadInfo.mEvalAllowed = true;
mLoadInfo.mReportCSPViolations = false;
}
mLoadInfo.mLoadGroup = aLoadGroup;
mLoadInfo.mPrincipalInfo = new PrincipalInfo();
mLoadInfo.mPrivateBrowsing = nsContentUtils::IsInPrivateBrowsing(aLoadGroup);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(
PrincipalToPrincipalInfo(aPrincipal, mLoadInfo.mPrincipalInfo)));
}
template <class Derived>
JSContext*
WorkerPrivateParent<Derived>::ParentJSContext() const
{
AssertIsOnParentThread();
if (mParent) {
return mParent->GetJSContext();
}
AssertIsOnMainThread();
return mLoadInfo.mScriptContext ?
mLoadInfo.mScriptContext->GetNativeContext() :
nsContentUtils::GetSafeJSContext();
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateOverridenLoadGroup(nsILoadGroup* aBaseLoadGroup)
{
AssertIsOnMainThread();
// The load group should have been overriden at init time.
mLoadInfo.mInterfaceRequestor->MaybeAddTabChild(aBaseLoadGroup);
}
template <class Derived>
NS_IMPL_ADDREF_INHERITED(WorkerPrivateParent<Derived>, DOMEventTargetHelper)
template <class Derived>
NS_IMPL_RELEASE_INHERITED(WorkerPrivateParent<Derived>, DOMEventTargetHelper)
template <class Derived>
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(WorkerPrivateParent<Derived>)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
DOMEventTargetHelper)
tmp->AssertIsOnParentThread();
// The WorkerPrivate::mSelfRef has a reference to itself, which is really
// held by the worker thread. We traverse this reference if and only if our
// busy count is zero and we have not released the main thread reference.
// We do not unlink it. This allows the CC to break cycles involving the
// WorkerPrivate and begin shutting it down (which does happen in unlink) but
// ensures that the WorkerPrivate won't be deleted before we're done shutting
// down the thread.
if (!tmp->mBusyCount && !tmp->mMainThreadObjectsForgotten) {
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSelfRef)
}
// The various strong references in LoadInfo are managed manually and cannot
// be cycle collected.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
DOMEventTargetHelper)
tmp->Terminate(nullptr);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
DOMEventTargetHelper)
tmp->AssertIsOnParentThread();
NS_IMPL_CYCLE_COLLECTION_TRACE_END
#ifdef DEBUG
template <class Derived>
void
WorkerPrivateParent<Derived>::AssertIsOnParentThread() const
{
if (GetParent()) {
GetParent()->AssertIsOnWorkerThread();
}
else {
AssertIsOnMainThread();
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::AssertInnerWindowIsCorrect() const
{
AssertIsOnParentThread();
// Only care about top level workers from windows.
if (mParent || !mLoadInfo.mWindow) {
return;
}
AssertIsOnMainThread();
nsPIDOMWindow* outer = mLoadInfo.mWindow->GetOuterWindow();
NS_ASSERTION(outer && outer->GetCurrentInnerWindow() == mLoadInfo.mWindow,
"Inner window no longer correct!");
}
#endif
class PostDebuggerMessageRunnable final : public nsRunnable
{
WorkerDebugger *mDebugger;
nsString mMessage;
public:
PostDebuggerMessageRunnable(WorkerDebugger* aDebugger,
const nsAString& aMessage)
: mDebugger(aDebugger),
mMessage(aMessage)
{
}
private:
~PostDebuggerMessageRunnable()
{ }
NS_IMETHOD
Run() override
{
mDebugger->PostMessageToDebuggerOnMainThread(mMessage);
return NS_OK;
}
};
class ReportDebuggerErrorRunnable final : public nsRunnable
{
WorkerDebugger *mDebugger;
nsString mFilename;
uint32_t mLineno;
nsString mMessage;
public:
ReportDebuggerErrorRunnable(WorkerDebugger* aDebugger,
const nsAString& aFilename, uint32_t aLineno,
const nsAString& aMessage)
: mDebugger(aDebugger),
mFilename(aFilename),
mLineno(aLineno),
mMessage(aMessage)
{
}
private:
~ReportDebuggerErrorRunnable()
{ }
NS_IMETHOD
Run() override
{
mDebugger->ReportErrorToDebuggerOnMainThread(mFilename, mLineno, mMessage);
return NS_OK;
}
};
WorkerDebugger::WorkerDebugger(WorkerPrivate* aWorkerPrivate)
: mWorkerPrivate(aWorkerPrivate),
mIsInitialized(false)
{
AssertIsOnMainThread();
}
WorkerDebugger::~WorkerDebugger()
{
MOZ_ASSERT(!mWorkerPrivate);
if (!NS_IsMainThread()) {
nsCOMPtr<nsIThread> mainThread;
if (NS_FAILED(NS_GetMainThread(getter_AddRefs(mainThread)))) {
NS_WARNING("Failed to proxy release of listeners, leaking instead!");
}
for (size_t index = 0; index < mListeners.Length(); ++index) {
nsIWorkerDebuggerListener* listener = nullptr;
mListeners[index].forget(&listener);
if (NS_FAILED(NS_ProxyRelease(mainThread, listener))) {
NS_WARNING("Failed to proxy release of listener, leaking instead!");
}
}
}
}
NS_IMPL_ISUPPORTS(WorkerDebugger, nsIWorkerDebugger)
NS_IMETHODIMP
WorkerDebugger::GetIsClosed(bool* aResult)
{
AssertIsOnMainThread();
*aResult = !mWorkerPrivate;
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::GetIsChrome(bool* aResult)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
*aResult = mWorkerPrivate->IsChromeWorker();
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::GetIsInitialized(bool* aResult)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
*aResult = mIsInitialized;
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::GetParent(nsIWorkerDebugger** aResult)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
WorkerPrivate* parent = mWorkerPrivate->GetParent();
if (!parent) {
*aResult = nullptr;
return NS_OK;
}
MOZ_ASSERT(mWorkerPrivate->IsDedicatedWorker());
nsCOMPtr<nsIWorkerDebugger> debugger = parent->Debugger();
debugger.forget(aResult);
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::GetType(uint32_t* aResult)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
*aResult = mWorkerPrivate->Type();
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::GetUrl(nsAString& aResult)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
aResult = mWorkerPrivate->ScriptURL();
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::GetWindow(nsIDOMWindow** aResult)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
if (mWorkerPrivate->GetParent() || !mWorkerPrivate->IsDedicatedWorker()) {
*aResult = nullptr;
return NS_OK;
}
nsCOMPtr<nsPIDOMWindow> window = mWorkerPrivate->GetWindow();
window.forget(aResult);
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::GetPrincipal(nsIPrincipal** aResult)
{
AssertIsOnMainThread();
MOZ_ASSERT(aResult);
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
nsCOMPtr<nsIPrincipal> prin = mWorkerPrivate->GetPrincipal();
prin.forget(aResult);
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::GetServiceWorkerID(uint32_t* aResult)
{
AssertIsOnMainThread();
MOZ_ASSERT(aResult);
if (!mWorkerPrivate || !mWorkerPrivate->IsServiceWorker()) {
return NS_ERROR_UNEXPECTED;
}
*aResult = mWorkerPrivate->ServiceWorkerID();
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::Initialize(const nsAString& aURL, JSContext* aCx)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
if (!mIsInitialized) {
RefPtr<CompileDebuggerScriptRunnable> runnable =
new CompileDebuggerScriptRunnable(mWorkerPrivate, aURL);
if (!runnable->Dispatch(aCx)) {
return NS_ERROR_FAILURE;
}
mIsInitialized = true;
}
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::PostMessageMoz(const nsAString& aMessage, JSContext* aCx)
{
AssertIsOnMainThread();
if (!mWorkerPrivate || !mIsInitialized) {
return NS_ERROR_UNEXPECTED;
}
RefPtr<DebuggerMessageEventRunnable> runnable =
new DebuggerMessageEventRunnable(mWorkerPrivate, aMessage);
if (!runnable->Dispatch(aCx)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::AddListener(nsIWorkerDebuggerListener* aListener)
{
AssertIsOnMainThread();
if (mListeners.Contains(aListener)) {
return NS_ERROR_INVALID_ARG;
}
mListeners.AppendElement(aListener);
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::RemoveListener(nsIWorkerDebuggerListener* aListener)
{
AssertIsOnMainThread();
if (!mListeners.Contains(aListener)) {
return NS_ERROR_INVALID_ARG;
}
mListeners.RemoveElement(aListener);
return NS_OK;
}
void
WorkerDebugger::Close()
{
MOZ_ASSERT(mWorkerPrivate);
mWorkerPrivate = nullptr;
nsTArray<nsCOMPtr<nsIWorkerDebuggerListener>> listeners(mListeners);
for (size_t index = 0; index < listeners.Length(); ++index) {
listeners[index]->OnClose();
}
}
void
WorkerDebugger::PostMessageToDebugger(const nsAString& aMessage)
{
mWorkerPrivate->AssertIsOnWorkerThread();
RefPtr<PostDebuggerMessageRunnable> runnable =
new PostDebuggerMessageRunnable(this, aMessage);
if (NS_FAILED(NS_DispatchToMainThread(runnable, NS_DISPATCH_NORMAL))) {
NS_WARNING("Failed to post message to debugger on main thread!");
}
}
void
WorkerDebugger::PostMessageToDebuggerOnMainThread(const nsAString& aMessage)
{
AssertIsOnMainThread();
nsTArray<nsCOMPtr<nsIWorkerDebuggerListener>> listeners(mListeners);
for (size_t index = 0; index < listeners.Length(); ++index) {
listeners[index]->OnMessage(aMessage);
}
}
void
WorkerDebugger::ReportErrorToDebugger(const nsAString& aFilename,
uint32_t aLineno,
const nsAString& aMessage)
{
mWorkerPrivate->AssertIsOnWorkerThread();
RefPtr<ReportDebuggerErrorRunnable> runnable =
new ReportDebuggerErrorRunnable(this, aFilename, aLineno, aMessage);
if (NS_FAILED(NS_DispatchToMainThread(runnable, NS_DISPATCH_NORMAL))) {
NS_WARNING("Failed to report error to debugger on main thread!");
}
}
void
WorkerDebugger::ReportErrorToDebuggerOnMainThread(const nsAString& aFilename,
uint32_t aLineno,
const nsAString& aMessage)
{
AssertIsOnMainThread();
nsTArray<nsCOMPtr<nsIWorkerDebuggerListener>> listeners(mListeners);
for (size_t index = 0; index < listeners.Length(); ++index) {
listeners[index]->OnError(aFilename, aLineno, aMessage);
}
LogErrorToConsole(aMessage, aFilename, nsString(), aLineno, 0, 0, 0);
}
WorkerPrivate::WorkerPrivate(JSContext* aCx,
WorkerPrivate* aParent,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsACString& aWorkerName,
WorkerLoadInfo& aLoadInfo)
: WorkerPrivateParent<WorkerPrivate>(aCx, aParent, aScriptURL,
aIsChromeWorker, aWorkerType,
aWorkerName, aLoadInfo)
, mDebuggerRegistered(false)
, mDebugger(nullptr)
, mJSContext(nullptr)
, mPRThread(nullptr)
, mDebuggerEventLoopLevel(0)
, mErrorHandlerRecursionCount(0)
, mNextTimeoutId(1)
, mStatus(Pending)
, mFrozen(false)
, mTimerRunning(false)
, mRunningExpiredTimeouts(false)
, mCloseHandlerStarted(false)
, mCloseHandlerFinished(false)
, mPendingEventQueueClearing(false)
, mMemoryReporterRunning(false)
, mBlockedForMemoryReporter(false)
, mCancelAllPendingRunnables(false)
, mPeriodicGCTimerRunning(false)
, mIdleGCTimerRunning(false)
, mWorkerScriptExecutedSuccessfully(false)
{
MOZ_ASSERT_IF(!IsDedicatedWorker(), !aWorkerName.IsVoid());
MOZ_ASSERT_IF(IsDedicatedWorker(), aWorkerName.IsEmpty());
if (aParent) {
aParent->AssertIsOnWorkerThread();
aParent->GetAllPreferences(mPreferences);
mOnLine = aParent->OnLine();
}
else {
AssertIsOnMainThread();
RuntimeService::GetDefaultPreferences(mPreferences);
mOnLine = !NS_IsOffline() && !NS_IsAppOffline(aLoadInfo.mPrincipal);
}
}
WorkerPrivate::~WorkerPrivate()
{
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
ErrorResult& aRv)
{
return WorkerPrivate::Constructor(aGlobal, aScriptURL, false,
WorkerTypeDedicated, EmptyCString(),
nullptr, aRv);
}
// static
bool
WorkerPrivate::WorkerAvailable(JSContext* /* unused */, JSObject* /* unused */)
{
// If we're already on a worker workers are clearly enabled.
if (!NS_IsMainThread()) {
return true;
}
// If our caller is chrome, workers are always available.
if (nsContentUtils::IsCallerChrome()) {
return true;
}
// Else check the pref.
return Preferences::GetBool(PREF_WORKERS_ENABLED);
}
// static
already_AddRefed<ChromeWorkerPrivate>
ChromeWorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
ErrorResult& aRv)
{
return WorkerPrivate::Constructor(aGlobal, aScriptURL, true,
WorkerTypeDedicated, EmptyCString(),
nullptr, aRv)
.downcast<ChromeWorkerPrivate>();
}
// static
bool
ChromeWorkerPrivate::WorkerAvailable(JSContext* aCx, JSObject* /* unused */)
{
// Chrome is always allowed to use workers, and content is never
// allowed to use ChromeWorker, so all we have to check is the
// caller. However, chrome workers apparently might not have a
// system principal, so we have to check for them manually.
if (NS_IsMainThread()) {
return nsContentUtils::IsCallerChrome();
}
return GetWorkerPrivateFromContext(aCx)->IsChromeWorker();
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsACString& aWorkerName,
WorkerLoadInfo* aLoadInfo, ErrorResult& aRv)
{
JSContext* cx = aGlobal.Context();
return Constructor(cx, aScriptURL, aIsChromeWorker, aWorkerType,
aWorkerName, aLoadInfo, aRv);
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(JSContext* aCx,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsACString& aWorkerName,
WorkerLoadInfo* aLoadInfo, ErrorResult& aRv)
{
WorkerPrivate* parent = NS_IsMainThread() ?
nullptr :
GetCurrentThreadWorkerPrivate();
if (parent) {
parent->AssertIsOnWorkerThread();
} else {
AssertIsOnMainThread();
}
// Only service and shared workers can have names.
MOZ_ASSERT_IF(aWorkerType != WorkerTypeDedicated,
!aWorkerName.IsVoid());
MOZ_ASSERT_IF(aWorkerType == WorkerTypeDedicated,
aWorkerName.IsEmpty());
Maybe<WorkerLoadInfo> stackLoadInfo;
if (!aLoadInfo) {
stackLoadInfo.emplace();
nsresult rv = GetLoadInfo(aCx, nullptr, parent, aScriptURL,
aIsChromeWorker, InheritLoadGroup,
aWorkerType, stackLoadInfo.ptr());
if (NS_FAILED(rv)) {
// XXXkhuey this is weird, why throw again after setting an exception?
scriptloader::ReportLoadError(aCx, rv);
aRv.Throw(rv);
return nullptr;
}
aLoadInfo = stackLoadInfo.ptr();
}
// NB: This has to be done before creating the WorkerPrivate, because it will
// attempt to use static variables that are initialized in the RuntimeService
// constructor.
RuntimeService* runtimeService;
if (!parent) {
runtimeService = RuntimeService::GetOrCreateService();
if (!runtimeService) {
JS_ReportError(aCx, "Failed to create runtime service!");
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
}
else {
runtimeService = RuntimeService::GetService();
}
MOZ_ASSERT(runtimeService);
RefPtr<WorkerPrivate> worker =
new WorkerPrivate(aCx, parent, aScriptURL, aIsChromeWorker,
aWorkerType, aWorkerName, *aLoadInfo);
if (!runtimeService->RegisterWorker(aCx, worker)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
worker->EnableDebugger();
RefPtr<CompileScriptRunnable> compiler =
new CompileScriptRunnable(worker, aScriptURL);
if (!compiler->Dispatch(aCx)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
worker->mSelfRef = worker;
return worker.forget();
}
// static
nsresult
WorkerPrivate::GetLoadInfo(JSContext* aCx, nsPIDOMWindow* aWindow,
WorkerPrivate* aParent, const nsAString& aScriptURL,
bool aIsChromeWorker,
LoadGroupBehavior aLoadGroupBehavior,
WorkerType aWorkerType,
WorkerLoadInfo* aLoadInfo)
{
using namespace mozilla::dom::workers::scriptloader;
using mozilla::dom::indexedDB::IDBFactory;
MOZ_ASSERT(aCx);
MOZ_ASSERT_IF(NS_IsMainThread(), aCx == nsContentUtils::GetCurrentJSContext());
if (aWindow) {
AssertIsOnMainThread();
}
WorkerLoadInfo loadInfo;
nsresult rv;
if (aParent) {
aParent->AssertIsOnWorkerThread();
// If the parent is going away give up now.
Status parentStatus;
{
MutexAutoLock lock(aParent->mMutex);
parentStatus = aParent->mStatus;
}
if (parentStatus > Running) {
NS_WARNING("Cannot create child workers from the close handler!");
return NS_ERROR_FAILURE;
}
// StartAssignment() is used instead getter_AddRefs because, getter_AddRefs
// does QI in debug build and, if this worker runs in a child process,
// HttpChannelChild will crash because it's not thread-safe.
rv = ChannelFromScriptURLWorkerThread(aCx, aParent, aScriptURL,
loadInfo.mChannel.StartAssignment());
NS_ENSURE_SUCCESS(rv, rv);
// Now that we've spun the loop there's no guarantee that our parent is
// still alive. We may have received control messages initiating shutdown.
{
MutexAutoLock lock(aParent->mMutex);
parentStatus = aParent->mStatus;
}
if (parentStatus > Running) {
nsCOMPtr<nsIThread> mainThread;
if (NS_FAILED(NS_GetMainThread(getter_AddRefs(mainThread))) ||
NS_FAILED(NS_ProxyRelease(mainThread, loadInfo.mChannel))) {
NS_WARNING("Failed to proxy release of channel, leaking instead!");
}
return NS_ERROR_FAILURE;
}
loadInfo.mDomain = aParent->Domain();
loadInfo.mFromWindow = aParent->IsFromWindow();
loadInfo.mWindowID = aParent->WindowID();
loadInfo.mStorageAllowed = aParent->IsStorageAllowed();
loadInfo.mPrivateBrowsing = aParent->IsInPrivateBrowsing();
loadInfo.mServiceWorkersTestingInWindow =
aParent->ServiceWorkersTestingInWindow();
} else {
AssertIsOnMainThread();
// Make sure that the IndexedDatabaseManager is set up
NS_WARN_IF(!indexedDB::IndexedDatabaseManager::GetOrCreate());
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
MOZ_ASSERT(ssm);
bool isChrome = nsContentUtils::IsCallerChrome();
// First check to make sure the caller has permission to make a privileged
// worker if they called the ChromeWorker/ChromeSharedWorker constructor.
if (aIsChromeWorker && !isChrome) {
return NS_ERROR_DOM_SECURITY_ERR;
}
// Chrome callers (whether creating a ChromeWorker or Worker) always get the
// system principal here as they're allowed to load anything. The script
// loader will refuse to run any script that does not also have the system
// principal.
if (isChrome) {
rv = ssm->GetSystemPrincipal(getter_AddRefs(loadInfo.mPrincipal));
NS_ENSURE_SUCCESS(rv, rv);
loadInfo.mPrincipalIsSystem = true;
}
// See if we're being called from a window.
nsCOMPtr<nsPIDOMWindow> globalWindow = aWindow;
if (!globalWindow) {
nsCOMPtr<nsIScriptGlobalObject> scriptGlobal =
nsJSUtils::GetStaticScriptGlobal(JS::CurrentGlobalOrNull(aCx));
if (scriptGlobal) {
globalWindow = do_QueryInterface(scriptGlobal);
MOZ_ASSERT(globalWindow);
}
}
nsCOMPtr<nsIDocument> document;
if (globalWindow) {
// Only use the current inner window, and only use it if the caller can
// access it.
nsPIDOMWindow* outerWindow = globalWindow->GetOuterWindow();
if (outerWindow) {
loadInfo.mWindow = outerWindow->GetCurrentInnerWindow();
// TODO: fix this for SharedWorkers with multiple documents (bug 1177935)
loadInfo.mServiceWorkersTestingInWindow =
outerWindow->GetServiceWorkersTestingEnabled();
}
if (!loadInfo.mWindow ||
(globalWindow != loadInfo.mWindow &&
!nsContentUtils::CanCallerAccess(loadInfo.mWindow))) {
return NS_ERROR_DOM_SECURITY_ERR;
}
nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(loadInfo.mWindow);
MOZ_ASSERT(sgo);
loadInfo.mScriptContext = sgo->GetContext();
NS_ENSURE_TRUE(loadInfo.mScriptContext, NS_ERROR_FAILURE);
// If we're called from a window then we can dig out the principal and URI
// from the document.
document = loadInfo.mWindow->GetExtantDoc();
NS_ENSURE_TRUE(document, NS_ERROR_FAILURE);
loadInfo.mBaseURI = document->GetDocBaseURI();
loadInfo.mLoadGroup = document->GetDocumentLoadGroup();
// Use the document's NodePrincipal as our principal if we're not being
// called from chrome.
if (!loadInfo.mPrincipal) {
loadInfo.mPrincipal = document->NodePrincipal();
NS_ENSURE_TRUE(loadInfo.mPrincipal, NS_ERROR_FAILURE);
// We use the document's base domain to limit the number of workers
// each domain can create. For sandboxed documents, we use the domain
// of their first non-sandboxed document, walking up until we find
// one. If we can't find one, we fall back to using the GUID of the
// null principal as the base domain.
if (document->GetSandboxFlags() & SANDBOXED_ORIGIN) {
nsCOMPtr<nsIDocument> tmpDoc = document;
do {
tmpDoc = tmpDoc->GetParentDocument();
} while (tmpDoc && tmpDoc->GetSandboxFlags() & SANDBOXED_ORIGIN);
if (tmpDoc) {
// There was an unsandboxed ancestor, yay!
nsCOMPtr<nsIPrincipal> tmpPrincipal = tmpDoc->NodePrincipal();
rv = tmpPrincipal->GetBaseDomain(loadInfo.mDomain);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// No unsandboxed ancestor, use our GUID.
rv = loadInfo.mPrincipal->GetBaseDomain(loadInfo.mDomain);
NS_ENSURE_SUCCESS(rv, rv);
}
} else {
// Document creating the worker is not sandboxed.
rv = loadInfo.mPrincipal->GetBaseDomain(loadInfo.mDomain);
NS_ENSURE_SUCCESS(rv, rv);
}
}
nsCOMPtr<nsIPermissionManager> permMgr =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t perm;
rv = permMgr->TestPermissionFromPrincipal(loadInfo.mPrincipal, "systemXHR",
&perm);
NS_ENSURE_SUCCESS(rv, rv);
loadInfo.mXHRParamsAllowed = perm == nsIPermissionManager::ALLOW_ACTION;
uint16_t appStatus = loadInfo.mPrincipal->GetAppStatus();
loadInfo.mIsInPrivilegedApp =
(appStatus == nsIPrincipal::APP_STATUS_CERTIFIED ||
appStatus == nsIPrincipal::APP_STATUS_PRIVILEGED);
loadInfo.mIsInCertifiedApp = (appStatus == nsIPrincipal::APP_STATUS_CERTIFIED);
loadInfo.mFromWindow = true;
loadInfo.mWindowID = globalWindow->WindowID();
nsContentUtils::StorageAccess access =
nsContentUtils::StorageAllowedForWindow(globalWindow);
loadInfo.mStorageAllowed = access > nsContentUtils::StorageAccess::eDeny;
loadInfo.mPrivateBrowsing = nsContentUtils::IsInPrivateBrowsing(document);
} else {
// Not a window
MOZ_ASSERT(isChrome);
// We're being created outside of a window. Need to figure out the script
// that is creating us in order for us to use relative URIs later on.
JS::AutoFilename fileName;
if (JS::DescribeScriptedCaller(aCx, &fileName)) {
// In most cases, fileName is URI. In a few other cases
// (e.g. xpcshell), fileName is a file path. Ideally, we would
// prefer testing whether fileName parses as an URI and fallback
// to file path in case of error, but Windows file paths have
// the interesting property that they can be parsed as bogus
// URIs (e.g. C:/Windows/Tmp is interpreted as scheme "C",
// hostname "Windows", path "Tmp"), which defeats this algorithm.
// Therefore, we adopt the opposite convention.
nsCOMPtr<nsIFile> scriptFile =
do_CreateInstance("@mozilla.org/file/local;1", &rv);
if (NS_FAILED(rv)) {
return rv;
}
rv = scriptFile->InitWithPath(NS_ConvertUTF8toUTF16(fileName.get()));
if (NS_SUCCEEDED(rv)) {
rv = NS_NewFileURI(getter_AddRefs(loadInfo.mBaseURI),
scriptFile);
}
if (NS_FAILED(rv)) {
// As expected, fileName is not a path, so proceed with
// a uri.
rv = NS_NewURI(getter_AddRefs(loadInfo.mBaseURI),
fileName.get());
}
if (NS_FAILED(rv)) {
return rv;
}
}
loadInfo.mXHRParamsAllowed = true;
loadInfo.mFromWindow = false;
loadInfo.mWindowID = UINT64_MAX;
loadInfo.mStorageAllowed = true;
loadInfo.mPrivateBrowsing = false;
}
MOZ_ASSERT(loadInfo.mPrincipal);
MOZ_ASSERT(isChrome || !loadInfo.mDomain.IsEmpty());
if (!loadInfo.mLoadGroup || aLoadGroupBehavior == OverrideLoadGroup) {
OverrideLoadInfoLoadGroup(loadInfo);
}
MOZ_ASSERT(NS_LoadGroupMatchesPrincipal(loadInfo.mLoadGroup,
loadInfo.mPrincipal));
rv = ChannelFromScriptURLMainThread(loadInfo.mPrincipal, loadInfo.mBaseURI,
document, loadInfo.mLoadGroup,
aScriptURL,
ContentPolicyType(aWorkerType),
getter_AddRefs(loadInfo.mChannel));
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_GetFinalChannelURI(loadInfo.mChannel,
getter_AddRefs(loadInfo.mResolvedScriptURI));
NS_ENSURE_SUCCESS(rv, rv);
}
aLoadInfo->StealFrom(loadInfo);
return NS_OK;
}
// static
void
WorkerPrivate::OverrideLoadInfoLoadGroup(WorkerLoadInfo& aLoadInfo)
{
MOZ_ASSERT(!aLoadInfo.mInterfaceRequestor);
aLoadInfo.mInterfaceRequestor =
new WorkerLoadInfo::InterfaceRequestor(aLoadInfo.mPrincipal,
aLoadInfo.mLoadGroup);
aLoadInfo.mInterfaceRequestor->MaybeAddTabChild(aLoadInfo.mLoadGroup);
// NOTE: this defaults the load context to:
// - private browsing = false
// - content = true
// - use remote tabs = false
nsCOMPtr<nsILoadGroup> loadGroup =
do_CreateInstance(NS_LOADGROUP_CONTRACTID);
nsresult rv =
loadGroup->SetNotificationCallbacks(aLoadInfo.mInterfaceRequestor);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(rv));
aLoadInfo.mLoadGroup = loadGroup.forget();
}
void
WorkerPrivate::DoRunLoop(JSContext* aCx)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mThread);
{
MutexAutoLock lock(mMutex);
mJSContext = aCx;
MOZ_ASSERT(mStatus == Pending);
mStatus = Running;
}
EnableMemoryReporter();
InitializeGCTimers();
Maybe<JSAutoCompartment> workerCompartment;
for (;;) {
Status currentStatus;
bool debuggerRunnablesPending = false;
bool normalRunnablesPending = false;
{
MutexAutoLock lock(mMutex);
while (mControlQueue.IsEmpty() &&
!(debuggerRunnablesPending = !mDebuggerQueue.IsEmpty()) &&
!(normalRunnablesPending = NS_HasPendingEvents(mThread))) {
WaitForWorkerEvents();
}
ProcessAllControlRunnablesLocked();
currentStatus = mStatus;
}
// If the close handler has finished and all features are done then we can
// kill this thread.
if (currentStatus != Running && !HasActiveFeatures()) {
if (mCloseHandlerFinished && currentStatus != Killing) {
if (!NotifyInternal(aCx, Killing)) {
JS_ReportPendingException(aCx);
}
#ifdef DEBUG
{
MutexAutoLock lock(mMutex);
currentStatus = mStatus;
}
MOZ_ASSERT(currentStatus == Killing);
#else
currentStatus = Killing;
#endif
}
// If we're supposed to die then we should exit the loop.
if (currentStatus == Killing) {
// Flush uncaught rejections immediately, without
// waiting for a next tick.
PromiseDebugging::FlushUncaughtRejections();
ShutdownGCTimers();
DisableMemoryReporter();
{
MutexAutoLock lock(mMutex);
mStatus = Dead;
mJSContext = nullptr;
}
// After mStatus is set to Dead there can be no more
// WorkerControlRunnables so no need to lock here.
if (!mControlQueue.IsEmpty()) {
WorkerControlRunnable* runnable;
while (mControlQueue.Pop(runnable)) {
runnable->Cancel();
runnable->Release();
}
}
// Unroot the globals
mScope = nullptr;
mDebuggerScope = nullptr;
return;
}
}
if (debuggerRunnablesPending || normalRunnablesPending) {
// Start the periodic GC timer if it is not already running.
SetGCTimerMode(PeriodicTimer);
}
if (debuggerRunnablesPending) {
WorkerRunnable* runnable;
{
MutexAutoLock lock(mMutex);
mDebuggerQueue.Pop(runnable);
debuggerRunnablesPending = !mDebuggerQueue.IsEmpty();
}
MOZ_ASSERT(runnable);
static_cast<nsIRunnable*>(runnable)->Run();
runnable->Release();
if (debuggerRunnablesPending) {
WorkerDebuggerGlobalScope* globalScope = DebuggerGlobalScope();
MOZ_ASSERT(globalScope);
// Now *might* be a good time to GC. Let the JS engine make the decision.
JSAutoCompartment ac(aCx, globalScope->GetGlobalJSObject());
JS_MaybeGC(aCx);
}
} else if (normalRunnablesPending) {
MOZ_ASSERT(NS_HasPendingEvents(mThread));
// Process a single runnable from the main queue.
MOZ_ALWAYS_TRUE(NS_ProcessNextEvent(mThread, false));
normalRunnablesPending = NS_HasPendingEvents(mThread);
if (normalRunnablesPending && GlobalScope()) {
// Now *might* be a good time to GC. Let the JS engine make the decision.
JSAutoCompartment ac(aCx, GlobalScope()->GetGlobalJSObject());
JS_MaybeGC(aCx);
}
}
if (!debuggerRunnablesPending && !normalRunnablesPending) {
// Both the debugger event queue and the normal event queue has been
// exhausted, cancel the periodic GC timer and schedule the idle GC timer.
SetGCTimerMode(IdleTimer);
}
}
MOZ_CRASH("Shouldn't get here!");
}
void
WorkerPrivate::OnProcessNextEvent()
{
AssertIsOnWorkerThread();
uint32_t recursionDepth = CycleCollectedJSRuntime::Get()->RecursionDepth();
MOZ_ASSERT(recursionDepth);
// Normally we process control runnables in DoRunLoop or RunCurrentSyncLoop.
// However, it's possible that non-worker C++ could spin its own nested event
// loop, and in that case we must ensure that we continue to process control
// runnables here.
if (recursionDepth > 1 &&
mSyncLoopStack.Length() < recursionDepth - 1) {
ProcessAllControlRunnables();
}
}
void
WorkerPrivate::AfterProcessNextEvent()
{
AssertIsOnWorkerThread();
MOZ_ASSERT(CycleCollectedJSRuntime::Get()->RecursionDepth());
}
void
WorkerPrivate::MaybeDispatchLoadFailedRunnable()
{
AssertIsOnWorkerThread();
nsCOMPtr<nsIRunnable> runnable = StealLoadFailedAsyncRunnable();
if (!runnable) {
return;
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(NS_DispatchToMainThread(runnable.forget())));
}
void
WorkerPrivate::InitializeGCTimers()
{
AssertIsOnWorkerThread();
// We need a timer for GC. The basic plan is to run a non-shrinking GC
// periodically (PERIODIC_GC_TIMER_DELAY_SEC) while the worker is running.
// Once the worker goes idle we set a short (IDLE_GC_TIMER_DELAY_SEC) timer to
// run a shrinking GC. If the worker receives more messages then the short
// timer is canceled and the periodic timer resumes.
mGCTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
MOZ_ASSERT(mGCTimer);
RefPtr<GarbageCollectRunnable> runnable =
new GarbageCollectRunnable(this, false, false);
mPeriodicGCTimerTarget = new TimerThreadEventTarget(this, runnable);
runnable = new GarbageCollectRunnable(this, true, false);
mIdleGCTimerTarget = new TimerThreadEventTarget(this, runnable);
mPeriodicGCTimerRunning = false;
mIdleGCTimerRunning = false;
}
void
WorkerPrivate::SetGCTimerMode(GCTimerMode aMode)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mGCTimer);
MOZ_ASSERT(mPeriodicGCTimerTarget);
MOZ_ASSERT(mIdleGCTimerTarget);
if ((aMode == PeriodicTimer && mPeriodicGCTimerRunning) ||
(aMode == IdleTimer && mIdleGCTimerRunning)) {
return;
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mGCTimer->Cancel()));
mPeriodicGCTimerRunning = false;
mIdleGCTimerRunning = false;
LOG(WorkerLog(),
("Worker %p canceled GC timer because %s\n", this,
aMode == PeriodicTimer ?
"periodic" :
aMode == IdleTimer ? "idle" : "none"));
if (aMode == NoTimer) {
return;
}
MOZ_ASSERT(aMode == PeriodicTimer || aMode == IdleTimer);
nsIEventTarget* target;
uint32_t delay;
int16_t type;
if (aMode == PeriodicTimer) {
target = mPeriodicGCTimerTarget;
delay = PERIODIC_GC_TIMER_DELAY_SEC * 1000;
type = nsITimer::TYPE_REPEATING_SLACK;
}
else {
target = mIdleGCTimerTarget;
delay = IDLE_GC_TIMER_DELAY_SEC * 1000;
type = nsITimer::TYPE_ONE_SHOT;
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mGCTimer->SetTarget(target)));
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(
mGCTimer->InitWithNamedFuncCallback(DummyCallback, nullptr, delay, type,
"dom::workers::DummyCallback(2)")));
if (aMode == PeriodicTimer) {
LOG(WorkerLog(), ("Worker %p scheduled periodic GC timer\n", this));
mPeriodicGCTimerRunning = true;
}
else {
LOG(WorkerLog(), ("Worker %p scheduled idle GC timer\n", this));
mIdleGCTimerRunning = true;
}
}
void
WorkerPrivate::ShutdownGCTimers()
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mGCTimer);
// Always make sure the timer is canceled.
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mGCTimer->Cancel()));
LOG(WorkerLog(), ("Worker %p killed the GC timer\n", this));
mGCTimer = nullptr;
mPeriodicGCTimerTarget = nullptr;
mIdleGCTimerTarget = nullptr;
mPeriodicGCTimerRunning = false;
mIdleGCTimerRunning = false;
}
bool
WorkerPrivate::InterruptCallback(JSContext* aCx)
{
AssertIsOnWorkerThread();
bool mayContinue = true;
bool scheduledIdleGC = false;
for (;;) {
// Run all control events now.
mayContinue = ProcessAllControlRunnables();
bool mayFreeze = mFrozen;
if (mayFreeze) {
MutexAutoLock lock(mMutex);
mayFreeze = mStatus <= Running;
}
if (!mayContinue || !mayFreeze) {
break;
}
// Cancel the periodic GC timer here before freezing. The idle GC timer
// will clean everything up once it runs.
if (!scheduledIdleGC) {
SetGCTimerMode(IdleTimer);
scheduledIdleGC = true;
}
while ((mayContinue = MayContinueRunning())) {
MutexAutoLock lock(mMutex);
if (!mControlQueue.IsEmpty()) {
break;
}
WaitForWorkerEvents(PR_MillisecondsToInterval(RemainingRunTimeMS()));
}
}
if (!mayContinue) {
// We want only uncatchable exceptions here.
NS_ASSERTION(!JS_IsExceptionPending(aCx),
"Should not have an exception set here!");
return false;
}
// Make sure the periodic timer gets turned back on here.
SetGCTimerMode(PeriodicTimer);
return true;
}
nsresult
WorkerPrivate::IsOnCurrentThread(bool* aIsOnCurrentThread)
{
// May be called on any thread!
MOZ_ASSERT(aIsOnCurrentThread);
MOZ_ASSERT(mPRThread);
*aIsOnCurrentThread = PR_GetCurrentThread() == mPRThread;
return NS_OK;
}
void
WorkerPrivate::ScheduleDeletion(WorkerRanOrNot aRanOrNot)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mChildWorkers.IsEmpty());
MOZ_ASSERT(mSyncLoopStack.IsEmpty());
MOZ_ASSERT(!mPendingEventQueueClearing);
ClearMainEventQueue(aRanOrNot);
#ifdef DEBUG
if (WorkerRan == aRanOrNot) {
nsIThread* currentThread = NS_GetCurrentThread();
MOZ_ASSERT(currentThread);
MOZ_ASSERT(!NS_HasPendingEvents(currentThread));
}
#endif
if (WorkerPrivate* parent = GetParent()) {
RefPtr<WorkerFinishedRunnable> runnable =
new WorkerFinishedRunnable(parent, this);
if (!runnable->Dispatch(nullptr)) {
NS_WARNING("Failed to dispatch runnable!");
}
}
else {
RefPtr<TopLevelWorkerFinishedRunnable> runnable =
new TopLevelWorkerFinishedRunnable(this);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
NS_WARNING("Failed to dispatch runnable!");
}
}
}
bool
WorkerPrivate::BlockAndCollectRuntimeStats(JS::RuntimeStats* aRtStats,
bool aAnonymize)
{
AssertIsOnMainThread();
mMutex.AssertCurrentThreadOwns();
NS_ASSERTION(aRtStats, "Null RuntimeStats!");
NS_ASSERTION(!mMemoryReporterRunning, "How can we get reentered here?!");
// This signals the worker that it should block itself as soon as possible.
mMemoryReporterRunning = true;
NS_ASSERTION(mJSContext, "This must never be null!");
JSRuntime* rt = JS_GetRuntime(mJSContext);
// If the worker is not already blocked (e.g. waiting for a worker event or
// currently in a ctypes call) then we need to trigger the interrupt
// callback to trap the worker.
if (!mBlockedForMemoryReporter) {
JS_RequestInterruptCallback(rt);
// Wait until the worker actually blocks.
while (!mBlockedForMemoryReporter) {
mMemoryReportCondVar.Wait();
}
}
bool succeeded = false;
// If mMemoryReporter is still set then we can do the actual report. Otherwise
// we're trying to shut down and we don't want to do anything but clean up.
if (mMemoryReporter) {
// Don't hold the lock while doing the actual report.
MutexAutoUnlock unlock(mMutex);
succeeded = JS::CollectRuntimeStats(rt, aRtStats, nullptr, aAnonymize);
}
NS_ASSERTION(mMemoryReporterRunning, "This isn't possible!");
NS_ASSERTION(mBlockedForMemoryReporter, "Somehow we got unblocked!");
// Tell the worker that it can now continue its execution.
mMemoryReporterRunning = false;
// The worker may be waiting so we must notify.
mMemoryReportCondVar.Notify();
return succeeded;
}
void
WorkerPrivate::EnableMemoryReporter()
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!mMemoryReporter);
// No need to lock here since the main thread can't race until we've
// successfully registered the reporter.
mMemoryReporter = new MemoryReporter(this);
if (NS_FAILED(RegisterWeakMemoryReporter(mMemoryReporter))) {
NS_WARNING("Failed to register memory reporter!");
// No need to lock here since a failed registration means our memory
// reporter can't start running. Just clean up.
mMemoryReporter = nullptr;
}
}
void
WorkerPrivate::DisableMemoryReporter()
{
AssertIsOnWorkerThread();
RefPtr<MemoryReporter> memoryReporter;
{
MutexAutoLock lock(mMutex);
// There is nothing to do here if the memory reporter was never successfully
// registered.
if (!mMemoryReporter) {
return;
}
// We don't need this set any longer. Swap it out so that we can unregister
// below.
mMemoryReporter.swap(memoryReporter);
// Next disable the memory reporter so that the main thread stops trying to
// signal us.
memoryReporter->Disable();
// If the memory reporter is waiting to start then we need to wait for it to
// finish.
if (mMemoryReporterRunning) {
NS_ASSERTION(!mBlockedForMemoryReporter,
"Can't be blocked in more than one place at the same time!");
mBlockedForMemoryReporter = true;
// Tell the main thread that we're blocked.
mMemoryReportCondVar.Notify();
// Wait for it the main thread to finish. Since we swapped out
// mMemoryReporter above the main thread should respond quickly.
while (mMemoryReporterRunning) {
mMemoryReportCondVar.Wait();
}
NS_ASSERTION(mBlockedForMemoryReporter, "Somehow we got unblocked!");
mBlockedForMemoryReporter = false;
}
}
// Finally unregister the memory reporter.
if (NS_FAILED(UnregisterWeakMemoryReporter(memoryReporter))) {
NS_WARNING("Failed to unregister memory reporter!");
}
}
void
WorkerPrivate::WaitForWorkerEvents(PRIntervalTime aInterval)
{
AssertIsOnWorkerThread();
mMutex.AssertCurrentThreadOwns();
NS_ASSERTION(!mBlockedForMemoryReporter,
"Can't be blocked in more than one place at the same time!");
// Let the main thread know that the worker is blocked and that memory
// reporting may proceed.
mBlockedForMemoryReporter = true;
// The main thread may be waiting so we must notify.
mMemoryReportCondVar.Notify();
// Now wait for an actual worker event.
mCondVar.Wait(aInterval);
// We've gotten some kind of signal but we can't continue until the memory
// reporter has finished. Wait again.
while (mMemoryReporterRunning) {
mMemoryReportCondVar.Wait();
}
NS_ASSERTION(mBlockedForMemoryReporter, "Somehow we got unblocked!");
// No need to notify here as the main thread isn't watching for this state.
mBlockedForMemoryReporter = false;
}
bool
WorkerPrivate::ProcessAllControlRunnablesLocked()
{
AssertIsOnWorkerThread();
mMutex.AssertCurrentThreadOwns();
bool result = true;
for (;;) {
// Block here if the memory reporter is trying to run.
if (mMemoryReporterRunning) {
MOZ_ASSERT(!mBlockedForMemoryReporter);
// Let the main thread know that we've received the block request and
// that memory reporting may proceed.
mBlockedForMemoryReporter = true;
// The main thread is almost certainly waiting so we must notify here.
mMemoryReportCondVar.Notify();
// Wait for the memory report to finish.
while (mMemoryReporterRunning) {
mMemoryReportCondVar.Wait();
}
MOZ_ASSERT(mBlockedForMemoryReporter);
// No need to notify here as the main thread isn't watching for this
// state.
mBlockedForMemoryReporter = false;
}
WorkerControlRunnable* event;
if (!mControlQueue.Pop(event)) {
break;
}
MutexAutoUnlock unlock(mMutex);
MOZ_ASSERT(event);
if (NS_FAILED(static_cast<nsIRunnable*>(event)->Run())) {
result = false;
}
event->Release();
}
return result;
}
void
WorkerPrivate::ClearMainEventQueue(WorkerRanOrNot aRanOrNot)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!mSyncLoopStack.Length());
MOZ_ASSERT(!mCancelAllPendingRunnables);
mCancelAllPendingRunnables = true;
if (WorkerNeverRan == aRanOrNot) {
for (uint32_t count = mPreStartRunnables.Length(), index = 0;
index < count;
index++) {
RefPtr<WorkerRunnable> runnable = mPreStartRunnables[index].forget();
static_cast<nsIRunnable*>(runnable.get())->Run();
}
} else {
nsIThread* currentThread = NS_GetCurrentThread();
MOZ_ASSERT(currentThread);
NS_ProcessPendingEvents(currentThread);
}
MOZ_ASSERT(mCancelAllPendingRunnables);
mCancelAllPendingRunnables = false;
}
uint32_t
WorkerPrivate::RemainingRunTimeMS() const
{
if (mKillTime.IsNull()) {
return UINT32_MAX;
}
TimeDuration runtime = mKillTime - TimeStamp::Now();
double ms = runtime > TimeDuration(0) ? runtime.ToMilliseconds() : 0;
return ms > double(UINT32_MAX) ? UINT32_MAX : uint32_t(ms);
}
bool
WorkerPrivate::FreezeInternal(JSContext* aCx)
{
AssertIsOnWorkerThread();
NS_ASSERTION(!mFrozen, "Already frozen!");
mFrozen = true;
return true;
}
bool
WorkerPrivate::ThawInternal(JSContext* aCx)
{
AssertIsOnWorkerThread();
NS_ASSERTION(mFrozen, "Not yet frozen!");
mFrozen = false;
return true;
}
void
WorkerPrivate::TraceTimeouts(const TraceCallbacks& aCallbacks,
void* aClosure) const
{
AssertIsOnWorkerThread();
for (uint32_t index = 0; index < mTimeouts.Length(); index++) {
TimeoutInfo* info = mTimeouts[index];
if (info->mTimeoutCallable.isUndefined()) {
continue;
}
aCallbacks.Trace(&info->mTimeoutCallable, "mTimeoutCallable", aClosure);
for (uint32_t index2 = 0; index2 < info->mExtraArgVals.Length(); index2++) {
aCallbacks.Trace(&info->mExtraArgVals[index2], "mExtraArgVals[i]", aClosure);
}
}
}
bool
WorkerPrivate::ModifyBusyCountFromWorker(JSContext* aCx, bool aIncrease)
{
AssertIsOnWorkerThread();
{
MutexAutoLock lock(mMutex);
// If we're in shutdown then the busy count is no longer being considered so
// just return now.
if (mStatus >= Killing) {
return true;
}
}
RefPtr<ModifyBusyCountRunnable> runnable =
new ModifyBusyCountRunnable(this, aIncrease);
return runnable->Dispatch(aCx);
}
bool
WorkerPrivate::AddChildWorker(JSContext* aCx, ParentType* aChildWorker)
{
AssertIsOnWorkerThread();
#ifdef DEBUG
{
Status currentStatus;
{
MutexAutoLock lock(mMutex);
currentStatus = mStatus;
}
MOZ_ASSERT(currentStatus == Running);
}
#endif
NS_ASSERTION(!mChildWorkers.Contains(aChildWorker),
"Already know about this one!");
mChildWorkers.AppendElement(aChildWorker);
return mChildWorkers.Length() == 1 ?
ModifyBusyCountFromWorker(aCx, true) :
true;
}
void
WorkerPrivate::RemoveChildWorker(JSContext* aCx, ParentType* aChildWorker)
{
AssertIsOnWorkerThread();
NS_ASSERTION(mChildWorkers.Contains(aChildWorker),
"Didn't know about this one!");
mChildWorkers.RemoveElement(aChildWorker);
if (mChildWorkers.IsEmpty() && !ModifyBusyCountFromWorker(aCx, false)) {
NS_WARNING("Failed to modify busy count!");
}
}
bool
WorkerPrivate::AddFeature(JSContext* aCx, WorkerFeature* aFeature)
{
AssertIsOnWorkerThread();
{
MutexAutoLock lock(mMutex);
if (mStatus >= Canceling) {
return false;
}
}
MOZ_ASSERT(!mFeatures.Contains(aFeature), "Already know about this one!");
if (mFeatures.IsEmpty() && !ModifyBusyCountFromWorker(aCx, true)) {
return false;
}
mFeatures.AppendElement(aFeature);
return true;
}
void
WorkerPrivate::RemoveFeature(JSContext* aCx, WorkerFeature* aFeature)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mFeatures.Contains(aFeature), "Didn't know about this one!");
mFeatures.RemoveElement(aFeature);
if (mFeatures.IsEmpty() && !ModifyBusyCountFromWorker(aCx, false)) {
NS_WARNING("Failed to modify busy count!");
}
}
void
WorkerPrivate::NotifyFeatures(JSContext* aCx, Status aStatus)
{
AssertIsOnWorkerThread();
NS_ASSERTION(aStatus > Running, "Bad status!");
if (aStatus >= Closing) {
CancelAllTimeouts(aCx);
}
nsTObserverArray<WorkerFeature*>::ForwardIterator iter(mFeatures);
while (iter.HasMore()) {
WorkerFeature* feature = iter.GetNext();
if (!feature->Notify(aCx, aStatus)) {
NS_WARNING("Failed to notify feature!");
}
}
nsAutoTArray<ParentType*, 10> children;
children.AppendElements(mChildWorkers);
for (uint32_t index = 0; index < children.Length(); index++) {
if (!children[index]->Notify(aCx, aStatus)) {
NS_WARNING("Failed to notify child worker!");
}
}
}
void
WorkerPrivate::CancelAllTimeouts(JSContext* aCx)
{
AssertIsOnWorkerThread();
LOG(TimeoutsLog(), ("Worker %p CancelAllTimeouts.\n", this));
if (mTimerRunning) {
NS_ASSERTION(mTimer && mTimerRunnable, "Huh?!");
NS_ASSERTION(!mTimeouts.IsEmpty(), "Huh?!");
if (NS_FAILED(mTimer->Cancel())) {
NS_WARNING("Failed to cancel timer!");
}
for (uint32_t index = 0; index < mTimeouts.Length(); index++) {
mTimeouts[index]->mCanceled = true;
}
if (!RunExpiredTimeouts(aCx)) {
JS_ReportPendingException(aCx);
}
mTimerRunning = false;
}
#ifdef DEBUG
else if (!mRunningExpiredTimeouts) {
NS_ASSERTION(mTimeouts.IsEmpty(), "Huh?!");
}
#endif
mTimer = nullptr;
mTimerRunnable = nullptr;
}
already_AddRefed<nsIEventTarget>
WorkerPrivate::CreateNewSyncLoop()
{
AssertIsOnWorkerThread();
nsCOMPtr<nsIThreadInternal> thread = do_QueryInterface(NS_GetCurrentThread());
MOZ_ASSERT(thread);
nsCOMPtr<nsIEventTarget> realEventTarget;
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(thread->PushEventQueue(
getter_AddRefs(realEventTarget))));
RefPtr<EventTarget> workerEventTarget =
new EventTarget(this, realEventTarget);
{
// Modifications must be protected by mMutex in DEBUG builds, see comment
// about mSyncLoopStack in WorkerPrivate.h.
#ifdef DEBUG
MutexAutoLock lock(mMutex);
#endif
mSyncLoopStack.AppendElement(new SyncLoopInfo(workerEventTarget));
}
return workerEventTarget.forget();
}
bool
WorkerPrivate::RunCurrentSyncLoop()
{
AssertIsOnWorkerThread();
JSContext* cx = GetJSContext();
MOZ_ASSERT(cx);
// This should not change between now and the time we finish running this sync
// loop.
uint32_t currentLoopIndex = mSyncLoopStack.Length() - 1;
SyncLoopInfo* loopInfo = mSyncLoopStack[currentLoopIndex];
MOZ_ASSERT(loopInfo);
MOZ_ASSERT(!loopInfo->mHasRun);
MOZ_ASSERT(!loopInfo->mCompleted);
#ifdef DEBUG
loopInfo->mHasRun = true;
#endif
while (!loopInfo->mCompleted) {
bool normalRunnablesPending = false;
// Don't block with the periodic GC timer running.
if (!NS_HasPendingEvents(mThread)) {
SetGCTimerMode(IdleTimer);
}
// Wait for something to do.
{
MutexAutoLock lock(mMutex);
for (;;) {
while (mControlQueue.IsEmpty() &&
!normalRunnablesPending &&
!(normalRunnablesPending = NS_HasPendingEvents(mThread))) {
WaitForWorkerEvents();
}
ProcessAllControlRunnablesLocked();
// NB: If we processed a NotifyRunnable, we might have run non-control
// runnables, one of which may have shut down the sync loop.
if (normalRunnablesPending || loopInfo->mCompleted) {
break;
}
}
}
if (normalRunnablesPending) {
// Make sure the periodic timer is running before we continue.
SetGCTimerMode(PeriodicTimer);
MOZ_ALWAYS_TRUE(NS_ProcessNextEvent(mThread, false));
// Now *might* be a good time to GC. Let the JS engine make the decision.
if (JS::CurrentGlobalOrNull(cx)) {
JS_MaybeGC(cx);
}
}
}
// Make sure that the stack didn't change underneath us.
MOZ_ASSERT(mSyncLoopStack[currentLoopIndex] == loopInfo);
return DestroySyncLoop(currentLoopIndex);
}
bool
WorkerPrivate::DestroySyncLoop(uint32_t aLoopIndex, nsIThreadInternal* aThread)
{
MOZ_ASSERT(!mSyncLoopStack.IsEmpty());
MOZ_ASSERT(mSyncLoopStack.Length() - 1 == aLoopIndex);
if (!aThread) {
aThread = mThread;
}
// We're about to delete the loop, stash its event target and result.
SyncLoopInfo* loopInfo = mSyncLoopStack[aLoopIndex];
nsIEventTarget* nestedEventTarget =
loopInfo->mEventTarget->GetWeakNestedEventTarget();
MOZ_ASSERT(nestedEventTarget);
bool result = loopInfo->mResult;
{
// Modifications must be protected by mMutex in DEBUG builds, see comment
// about mSyncLoopStack in WorkerPrivate.h.
#ifdef DEBUG
MutexAutoLock lock(mMutex);
#endif
// This will delete |loopInfo|!
mSyncLoopStack.RemoveElementAt(aLoopIndex);
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(aThread->PopEventQueue(nestedEventTarget)));
if (!mSyncLoopStack.Length() && mPendingEventQueueClearing) {
ClearMainEventQueue(WorkerRan);
mPendingEventQueueClearing = false;
}
return result;
}
void
WorkerPrivate::StopSyncLoop(nsIEventTarget* aSyncLoopTarget, bool aResult)
{
AssertIsOnWorkerThread();
AssertValidSyncLoop(aSyncLoopTarget);
MOZ_ASSERT(!mSyncLoopStack.IsEmpty());
for (uint32_t index = mSyncLoopStack.Length(); index > 0; index--) {
nsAutoPtr<SyncLoopInfo>& loopInfo = mSyncLoopStack[index - 1];
MOZ_ASSERT(loopInfo);
MOZ_ASSERT(loopInfo->mEventTarget);
if (loopInfo->mEventTarget == aSyncLoopTarget) {
// Can't assert |loop->mHasRun| here because dispatch failures can cause
// us to bail out early.
MOZ_ASSERT(!loopInfo->mCompleted);
loopInfo->mResult = aResult;
loopInfo->mCompleted = true;
loopInfo->mEventTarget->Disable();
return;
}
MOZ_ASSERT(!SameCOMIdentity(loopInfo->mEventTarget, aSyncLoopTarget));
}
MOZ_CRASH("Unknown sync loop!");
}
#ifdef DEBUG
void
WorkerPrivate::AssertValidSyncLoop(nsIEventTarget* aSyncLoopTarget)
{
MOZ_ASSERT(aSyncLoopTarget);
EventTarget* workerTarget;
nsresult rv =
aSyncLoopTarget->QueryInterface(kDEBUGWorkerEventTargetIID,
reinterpret_cast<void**>(&workerTarget));
MOZ_ASSERT(NS_SUCCEEDED(rv));
MOZ_ASSERT(workerTarget);
bool valid = false;
{
MutexAutoLock lock(mMutex);
for (uint32_t index = 0; index < mSyncLoopStack.Length(); index++) {
nsAutoPtr<SyncLoopInfo>& loopInfo = mSyncLoopStack[index];
MOZ_ASSERT(loopInfo);
MOZ_ASSERT(loopInfo->mEventTarget);
if (loopInfo->mEventTarget == aSyncLoopTarget) {
valid = true;
break;
}
MOZ_ASSERT(!SameCOMIdentity(loopInfo->mEventTarget, aSyncLoopTarget));
}
}
MOZ_ASSERT(valid);
}
#endif
void
WorkerPrivate::PostMessageToParentInternal(
JSContext* aCx,
JS::Handle<JS::Value> aMessage,
const Optional<Sequence<JS::Value>>& aTransferable,
ErrorResult& aRv)
{
AssertIsOnWorkerThread();
JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
if (aTransferable.WasPassed()) {
const Sequence<JS::Value>& realTransferable = aTransferable.Value();
// The input sequence only comes from the generated bindings code, which
// ensures it is rooted.
JS::HandleValueArray elements =
JS::HandleValueArray::fromMarkedLocation(realTransferable.Length(),
realTransferable.Elements());
JSObject* array = JS_NewArrayObject(aCx, elements);
if (!array) {
aRv = NS_ERROR_OUT_OF_MEMORY;
return;
}
transferable.setObject(*array);
}
RefPtr<MessageEventRunnable> runnable =
new MessageEventRunnable(this,
WorkerRunnable::ParentThreadUnchangedBusyCount);
UniquePtr<AbstractTimelineMarker> start;
UniquePtr<AbstractTimelineMarker> end;
RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
bool isTimelineRecording = timelines && !timelines->IsEmpty();
if (isTimelineRecording) {
start = MakeUnique<WorkerTimelineMarker>(NS_IsMainThread()
? ProfileTimelineWorkerOperationType::SerializeDataOnMainThread
: ProfileTimelineWorkerOperationType::SerializeDataOffMainThread,
MarkerTracingType::START);
}
runnable->Write(aCx, aMessage, transferable, aRv);
if (isTimelineRecording) {
end = MakeUnique<WorkerTimelineMarker>(NS_IsMainThread()
? ProfileTimelineWorkerOperationType::SerializeDataOnMainThread
: ProfileTimelineWorkerOperationType::SerializeDataOffMainThread,
MarkerTracingType::END);
timelines->AddMarkerForAllObservedDocShells(start);
timelines->AddMarkerForAllObservedDocShells(end);
}
if (NS_WARN_IF(aRv.Failed())) {
return;
}
if (!runnable->Dispatch(aCx)) {
aRv = NS_ERROR_FAILURE;
}
}
void
WorkerPrivate::EnterDebuggerEventLoop()
{
AssertIsOnWorkerThread();
JSContext* cx = GetJSContext();
MOZ_ASSERT(cx);
uint32_t currentEventLoopLevel = ++mDebuggerEventLoopLevel;
while (currentEventLoopLevel <= mDebuggerEventLoopLevel) {
bool debuggerRunnablesPending = false;
{
MutexAutoLock lock(mMutex);
debuggerRunnablesPending = !mDebuggerQueue.IsEmpty();
}
// Don't block with the periodic GC timer running.
if (!debuggerRunnablesPending) {
SetGCTimerMode(IdleTimer);
}
// Wait for something to do
{
MutexAutoLock lock(mMutex);
while (mControlQueue.IsEmpty() &&
!(debuggerRunnablesPending = !mDebuggerQueue.IsEmpty())) {
WaitForWorkerEvents();
}
ProcessAllControlRunnablesLocked();
}
if (debuggerRunnablesPending) {
// Start the periodic GC timer if it is not already running.
SetGCTimerMode(PeriodicTimer);
WorkerRunnable* runnable;
{
MutexAutoLock lock(mMutex);
mDebuggerQueue.Pop(runnable);
}
MOZ_ASSERT(runnable);
static_cast<nsIRunnable*>(runnable)->Run();
runnable->Release();
// Now *might* be a good time to GC. Let the JS engine make the decision.
if (JS::CurrentGlobalOrNull(cx)) {
JS_MaybeGC(cx);
}
}
}
}
void
WorkerPrivate::LeaveDebuggerEventLoop()
{
AssertIsOnWorkerThread();
MutexAutoLock lock(mMutex);
if (mDebuggerEventLoopLevel > 0) {
--mDebuggerEventLoopLevel;
}
}
void
WorkerPrivate::PostMessageToDebugger(const nsAString& aMessage)
{
mDebugger->PostMessageToDebugger(aMessage);
}
void
WorkerPrivate::SetDebuggerImmediate(JSContext* aCx, dom::Function& aHandler,
ErrorResult& aRv)
{
AssertIsOnWorkerThread();
RefPtr<DebuggerImmediateRunnable> runnable =
new DebuggerImmediateRunnable(this, aHandler);
if (!runnable->Dispatch(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
}
}
void
WorkerPrivate::ReportErrorToDebugger(const nsAString& aFilename,
uint32_t aLineno,
const nsAString& aMessage)
{
mDebugger->ReportErrorToDebugger(aFilename, aLineno, aMessage);
}
bool
WorkerPrivate::NotifyInternal(JSContext* aCx, Status aStatus)
{
AssertIsOnWorkerThread();
NS_ASSERTION(aStatus > Running && aStatus < Dead, "Bad status!");
RefPtr<EventTarget> eventTarget;
// Save the old status and set the new status.
Status previousStatus;
{
MutexAutoLock lock(mMutex);
if (mStatus >= aStatus) {
MOZ_ASSERT(!mEventTarget);
return true;
}
previousStatus = mStatus;
mStatus = aStatus;
mEventTarget.swap(eventTarget);
}
// Now that mStatus > Running, no-one can create a new WorkerEventTarget or
// WorkerCrossThreadDispatcher if we don't already have one.
if (eventTarget) {
// Since we'll no longer process events, make sure we no longer allow anyone
// to post them. We have to do this without mMutex held, since our mutex
// must be acquired *after* the WorkerEventTarget's mutex when they're both
// held.
eventTarget->Disable();
eventTarget = nullptr;
}
if (mCrossThreadDispatcher) {
// Since we'll no longer process events, make sure we no longer allow
// anyone to post them. We have to do this without mMutex held, since our
// mutex must be acquired *after* mCrossThreadDispatcher's mutex when
// they're both held.
mCrossThreadDispatcher->Forget();
mCrossThreadDispatcher = nullptr;
}
MOZ_ASSERT(previousStatus != Pending);
MOZ_ASSERT(previousStatus >= Canceling || mKillTime.IsNull());
// Let all our features know the new status.
NotifyFeatures(aCx, aStatus);
// If this is the first time our status has changed then we need to clear the
// main event queue.
if (previousStatus == Running) {
// NB: If we're in a sync loop, we can't clear the queue immediately,
// because this is the wrong queue. So we have to defer it until later.
if (mSyncLoopStack.Length()) {
mPendingEventQueueClearing = true;
} else {
ClearMainEventQueue(WorkerRan);
}
}
// If we've run the close handler, we don't need to do anything else.
if (mCloseHandlerFinished) {
return true;
}
// If the worker script never ran, or failed to compile, we don't need to do
// anything else, except pretend that we ran the close handler.
if (!JS::CurrentGlobalOrNull(aCx)) {
mCloseHandlerStarted = true;
mCloseHandlerFinished = true;
return true;
}
// If this is the first time our status has changed we also need to schedule
// the close handler unless we're being shut down.
if (previousStatus == Running && aStatus != Killing) {
MOZ_ASSERT(!mCloseHandlerStarted && !mCloseHandlerFinished);
RefPtr<CloseEventRunnable> closeRunnable = new CloseEventRunnable(this);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(NS_DispatchToCurrentThread(closeRunnable)));
}
if (aStatus == Closing) {
// Notify parent to stop sending us messages and balance our busy count.
RefPtr<CloseRunnable> runnable = new CloseRunnable(this);
if (!runnable->Dispatch(aCx)) {
return false;
}
// Don't abort the script.
return true;
}
if (aStatus == Terminating) {
// Only abort the script if we're not yet running the close handler.
return mCloseHandlerStarted;
}
if (aStatus == Canceling) {
// We need to enforce a timeout on the close handler.
MOZ_ASSERT(previousStatus >= Running && previousStatus <= Terminating);
uint32_t killSeconds = IsChromeWorker() ?
RuntimeService::GetChromeCloseHandlerTimeoutSeconds() :
RuntimeService::GetContentCloseHandlerTimeoutSeconds();
if (killSeconds) {
mKillTime = TimeStamp::Now() + TimeDuration::FromSeconds(killSeconds);
if (!mCloseHandlerFinished && !ScheduleKillCloseEventRunnable(aCx)) {
return false;
}
}
// Only abort the script if we're not yet running the close handler.
return mCloseHandlerStarted;
}
MOZ_ASSERT(aStatus == Killing);
mKillTime = TimeStamp::Now();
if (mCloseHandlerStarted && !mCloseHandlerFinished) {
ScheduleKillCloseEventRunnable(aCx);
}
// Always abort the script.
return false;
}
bool
WorkerPrivate::ScheduleKillCloseEventRunnable(JSContext* aCx)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!mKillTime.IsNull());
RefPtr<KillCloseEventRunnable> killCloseEventRunnable =
new KillCloseEventRunnable(this);
if (!killCloseEventRunnable->SetTimeout(aCx, RemainingRunTimeMS())) {
return false;
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(NS_DispatchToCurrentThread(
killCloseEventRunnable)));
return true;
}
void
WorkerPrivate::ReportError(JSContext* aCx, const char* aMessage,
JSErrorReport* aReport)
{
AssertIsOnWorkerThread();
if (!MayContinueRunning() || mErrorHandlerRecursionCount == 2) {
return;
}
NS_ASSERTION(mErrorHandlerRecursionCount == 0 ||
mErrorHandlerRecursionCount == 1,
"Bad recursion logic!");
JS_ClearPendingException(aCx);
nsString message, filename, line;
uint32_t lineNumber, columnNumber, flags, errorNumber;
JSExnType exnType = JSEXN_ERR;
bool mutedError = aReport && aReport->isMuted;
if (aReport) {
// ErrorEvent objects don't have a |name| field the way ES |Error| objects
// do. Traditionally (and mostly by accident), the |message| field of
// ErrorEvent has corresponded to |Name: Message| of the original Error
// object. Things have been cleaned up in the JS engine, so now we need to
// format this string explicitly.
JS::Rooted<JSString*> messageStr(aCx,
js::ErrorReportToString(aCx, aReport));
if (messageStr) {
nsAutoJSString autoStr;
if (autoStr.init(aCx, messageStr)) {
message = autoStr;
}
}
filename = NS_ConvertUTF8toUTF16(aReport->filename);
line = aReport->uclinebuf;
lineNumber = aReport->lineno;
columnNumber = aReport->uctokenptr - aReport->uclinebuf;
flags = aReport->flags;
errorNumber = aReport->errorNumber;
MOZ_ASSERT(aReport->exnType >= JSEXN_NONE && aReport->exnType < JSEXN_LIMIT);
exnType = JSExnType(aReport->exnType);
}
else {
lineNumber = columnNumber = errorNumber = 0;
flags = nsIScriptError::errorFlag | nsIScriptError::exceptionFlag;
}
if (message.IsEmpty()) {
message = NS_ConvertUTF8toUTF16(aMessage);
}
mErrorHandlerRecursionCount++;
// Don't want to run the scope's error handler if this is a recursive error or
// if there was an error in the close handler or if we ran out of memory.
bool fireAtScope = mErrorHandlerRecursionCount == 1 &&
!mCloseHandlerStarted &&
errorNumber != JSMSG_OUT_OF_MEMORY &&
JS::CurrentGlobalOrNull(aCx);
if (!ReportErrorRunnable::ReportError(aCx, this, fireAtScope, nullptr, message,
filename, line, lineNumber,
columnNumber, flags, errorNumber, exnType,
mutedError, 0)) {
JS_ReportPendingException(aCx);
}
mErrorHandlerRecursionCount--;
}
int32_t
WorkerPrivate::SetTimeout(JSContext* aCx,
dom::Function* aHandler,
const nsAString& aStringHandler,
int32_t aTimeout,
const Sequence<JS::Value>& aArguments,
bool aIsInterval,
ErrorResult& aRv)
{
AssertIsOnWorkerThread();
const int32_t timerId = mNextTimeoutId++;
Status currentStatus;
{
MutexAutoLock lock(mMutex);
currentStatus = mStatus;
}
// It's a script bug if setTimeout/setInterval are called from a close handler
// so throw an exception.
if (currentStatus == Closing) {
JS_ReportError(aCx, "Cannot schedule timeouts from the close handler!");
}
// If the worker is trying to call setTimeout/setInterval and the parent
// thread has initiated the close process then just silently fail.
if (currentStatus >= Closing) {
aRv.Throw(NS_ERROR_FAILURE);
return 0;
}
nsAutoPtr<TimeoutInfo> newInfo(new TimeoutInfo());
newInfo->mIsInterval = aIsInterval;
newInfo->mId = timerId;
if (MOZ_UNLIKELY(timerId == INT32_MAX)) {
NS_WARNING("Timeout ids overflowed!");
mNextTimeoutId = 1;
}
// Take care of the main argument.
if (aHandler) {
newInfo->mTimeoutCallable = JS::ObjectValue(*aHandler->Callable());
}
else if (!aStringHandler.IsEmpty()) {
newInfo->mTimeoutString = aStringHandler;
}
else {
JS_ReportError(aCx, "Useless %s call (missing quotes around argument?)",
aIsInterval ? "setInterval" : "setTimeout");
return 0;
}
// See if any of the optional arguments were passed.
aTimeout = std::max(0, aTimeout);
newInfo->mInterval = TimeDuration::FromMilliseconds(aTimeout);
uint32_t argc = aArguments.Length();
if (argc && !newInfo->mTimeoutCallable.isUndefined()) {
nsTArray<JS::Heap<JS::Value>> extraArgVals(argc);
for (uint32_t index = 0; index < argc; index++) {
extraArgVals.AppendElement(aArguments[index]);
}
newInfo->mExtraArgVals.SwapElements(extraArgVals);
}
newInfo->mTargetTime = TimeStamp::Now() + newInfo->mInterval;
if (!newInfo->mTimeoutString.IsEmpty()) {
if (!nsJSUtils::GetCallingLocation(aCx, newInfo->mFilename, &newInfo->mLineNumber)) {
NS_WARNING("Failed to get calling location!");
}
}
nsAutoPtr<TimeoutInfo>* insertedInfo =
mTimeouts.InsertElementSorted(newInfo.forget(), GetAutoPtrComparator(mTimeouts));
LOG(TimeoutsLog(), ("Worker %p has new timeout: delay=%d interval=%s\n",
this, aTimeout, aIsInterval ? "yes" : "no"));
// If the timeout we just made is set to fire next then we need to update the
// timer, unless we're currently running timeouts.
if (insertedInfo == mTimeouts.Elements() && !mRunningExpiredTimeouts) {
nsresult rv;
if (!mTimer) {
mTimer = do_CreateInstance(NS_TIMER_CONTRACTID, &rv);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return 0;
}
mTimerRunnable = new TimerRunnable(this);
}
if (!mTimerRunning) {
if (!ModifyBusyCountFromWorker(aCx, true)) {
aRv.Throw(NS_ERROR_FAILURE);
return 0;
}
mTimerRunning = true;
}
if (!RescheduleTimeoutTimer(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return 0;
}
}
return timerId;
}
void
WorkerPrivate::ClearTimeout(int32_t aId)
{
AssertIsOnWorkerThread();
if (!mTimeouts.IsEmpty()) {
NS_ASSERTION(mTimerRunning, "Huh?!");
for (uint32_t index = 0; index < mTimeouts.Length(); index++) {
nsAutoPtr<TimeoutInfo>& info = mTimeouts[index];
if (info->mId == aId) {
info->mCanceled = true;
break;
}
}
}
}
bool
WorkerPrivate::RunExpiredTimeouts(JSContext* aCx)
{
AssertIsOnWorkerThread();
// We may be called recursively (e.g. close() inside a timeout) or we could
// have been canceled while this event was pending, bail out if there is
// nothing to do.
if (mRunningExpiredTimeouts || !mTimerRunning) {
return true;
}
NS_ASSERTION(mTimer && mTimerRunnable, "Must have a timer!");
NS_ASSERTION(!mTimeouts.IsEmpty(), "Should have some work to do!");
bool retval = true;
AutoPtrComparator<TimeoutInfo> comparator = GetAutoPtrComparator(mTimeouts);
JS::Rooted<JSObject*> global(aCx, JS::CurrentGlobalOrNull(aCx));
// We want to make sure to run *something*, even if the timer fired a little
// early. Fudge the value of now to at least include the first timeout.
const TimeStamp actual_now = TimeStamp::Now();
const TimeStamp now = std::max(actual_now, mTimeouts[0]->mTargetTime);
if (now != actual_now) {
LOG(TimeoutsLog(), ("Worker %p fudged timeout by %f ms.\n", this,
(now - actual_now).ToMilliseconds()));
}
nsAutoTArray<TimeoutInfo*, 10> expiredTimeouts;
for (uint32_t index = 0; index < mTimeouts.Length(); index++) {
nsAutoPtr<TimeoutInfo>& info = mTimeouts[index];
if (info->mTargetTime > now) {
break;
}
expiredTimeouts.AppendElement(info);
}
// Guard against recursion.
mRunningExpiredTimeouts = true;
// Run expired timeouts.
for (uint32_t index = 0; index < expiredTimeouts.Length(); index++) {
TimeoutInfo*& info = expiredTimeouts[index];
if (info->mCanceled) {
continue;
}
LOG(TimeoutsLog(), ("Worker %p executing timeout with original delay %f ms.\n",
this, info->mInterval.ToMilliseconds()));
// Always call JS_ReportPendingException if something fails, and if
// JS_ReportPendingException returns false (i.e. uncatchable exception) then
// break out of the loop.
if (!info->mTimeoutCallable.isUndefined()) {
JS::Rooted<JS::Value> rval(aCx);
JS::HandleValueArray args =
JS::HandleValueArray::fromMarkedLocation(info->mExtraArgVals.Length(),
info->mExtraArgVals.Elements()->address());
JS::Rooted<JS::Value> callable(aCx, info->mTimeoutCallable);
if (!JS_CallFunctionValue(aCx, global, callable, args, &rval) &&
!JS_ReportPendingException(aCx)) {
retval = false;
break;
}
}
else {
nsString expression = info->mTimeoutString;
JS::CompileOptions options(aCx);
options.setFileAndLine(info->mFilename.get(), info->mLineNumber)
.setNoScriptRval(true);
JS::Rooted<JS::Value> unused(aCx);
if ((expression.IsEmpty() ||
!JS::Evaluate(aCx, options,
expression.get(), expression.Length(), &unused)) &&
!JS_ReportPendingException(aCx)) {
retval = false;
break;
}
}
// Since we might be processing more timeouts, go ahead and flush
// the promise queue now before we do that.
Promise::PerformMicroTaskCheckpoint();
NS_ASSERTION(mRunningExpiredTimeouts, "Someone changed this!");
}
// No longer possible to be called recursively.
mRunningExpiredTimeouts = false;
// Now remove canceled and expired timeouts from the main list.
// NB: The timeouts present in expiredTimeouts must have the same order
// with respect to each other in mTimeouts. That is, mTimeouts is just
// expiredTimeouts with extra elements inserted. There may be unexpired
// timeouts that have been inserted between the expired timeouts if the
// timeout event handler called setTimeout/setInterval.
for (uint32_t index = 0, expiredTimeoutIndex = 0,
expiredTimeoutLength = expiredTimeouts.Length();
index < mTimeouts.Length(); ) {
nsAutoPtr<TimeoutInfo>& info = mTimeouts[index];
if ((expiredTimeoutIndex < expiredTimeoutLength &&
info == expiredTimeouts[expiredTimeoutIndex] &&
++expiredTimeoutIndex) ||
info->mCanceled) {
if (info->mIsInterval && !info->mCanceled) {
// Reschedule intervals.
info->mTargetTime = info->mTargetTime + info->mInterval;
// Don't resort the list here, we'll do that at the end.
++index;
}
else {
mTimeouts.RemoveElement(info);
}
}
else {
// If info did not match the current entry in expiredTimeouts, it
// shouldn't be there at all.
NS_ASSERTION(!expiredTimeouts.Contains(info),
"Our timeouts are out of order!");
++index;
}
}
mTimeouts.Sort(comparator);
// Either signal the parent that we're no longer using timeouts or reschedule
// the timer.
if (mTimeouts.IsEmpty()) {
if (!ModifyBusyCountFromWorker(aCx, false)) {
retval = false;
}
mTimerRunning = false;
}
else if (retval && !RescheduleTimeoutTimer(aCx)) {
retval = false;
}
return retval;
}
bool
WorkerPrivate::RescheduleTimeoutTimer(JSContext* aCx)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!mRunningExpiredTimeouts);
NS_ASSERTION(!mTimeouts.IsEmpty(), "Should have some timeouts!");
NS_ASSERTION(mTimer && mTimerRunnable, "Should have a timer!");
// NB: This is important! The timer may have already fired, e.g. if a timeout
// callback itself calls setTimeout for a short duration and then takes longer
// than that to finish executing. If that has happened, it's very important
// that we don't execute the event that is now pending in our event queue, or
// our code in RunExpiredTimeouts to "fudge" the timeout value will unleash an
// early timeout when we execute the event we're about to queue.
mTimer->Cancel();
double delta =
(mTimeouts[0]->mTargetTime - TimeStamp::Now()).ToMilliseconds();
uint32_t delay = delta > 0 ? std::min(delta, double(UINT32_MAX)) : 0;
LOG(TimeoutsLog(), ("Worker %p scheduled timer for %d ms, %d pending timeouts\n",
this, delay, mTimeouts.Length()));
nsresult rv = mTimer->InitWithCallback(mTimerRunnable, delay, nsITimer::TYPE_ONE_SHOT);
if (NS_FAILED(rv)) {
JS_ReportError(aCx, "Failed to start timer!");
return false;
}
return true;
}
void
WorkerPrivate::UpdateRuntimeOptionsInternal(
JSContext* aCx,
const JS::RuntimeOptions& aRuntimeOptions)
{
AssertIsOnWorkerThread();
JS::RuntimeOptionsRef(aCx) = aRuntimeOptions;
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateRuntimeOptions(aCx, aRuntimeOptions);
}
}
void
WorkerPrivate::UpdateLanguagesInternal(JSContext* aCx,
const nsTArray<nsString>& aLanguages)
{
WorkerGlobalScope* globalScope = GlobalScope();
if (globalScope) {
RefPtr<WorkerNavigator> nav = globalScope->GetExistingNavigator();
if (nav) {
nav->SetLanguages(aLanguages);
}
}
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateLanguages(aCx, aLanguages);
}
}
void
WorkerPrivate::UpdatePreferenceInternal(JSContext* aCx, WorkerPreference aPref, bool aValue)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(aPref >= 0 && aPref < WORKERPREF_COUNT);
mPreferences[aPref] = aValue;
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdatePreference(aCx, aPref, aValue);
}
}
void
WorkerPrivate::UpdateJSWorkerMemoryParameterInternal(JSContext* aCx,
JSGCParamKey aKey,
uint32_t aValue)
{
AssertIsOnWorkerThread();
// XXX aValue might be 0 here (telling us to unset a previous value for child
// workers). Calling JS_SetGCParameter with a value of 0 isn't actually
// supported though. We really need some way to revert to a default value
// here.
if (aValue) {
JS_SetGCParameter(JS_GetRuntime(aCx), aKey, aValue);
}
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateJSWorkerMemoryParameter(aCx, aKey, aValue);
}
}
#ifdef JS_GC_ZEAL
void
WorkerPrivate::UpdateGCZealInternal(JSContext* aCx, uint8_t aGCZeal,
uint32_t aFrequency)
{
AssertIsOnWorkerThread();
JS_SetGCZeal(aCx, aGCZeal, aFrequency);
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateGCZeal(aCx, aGCZeal, aFrequency);
}
}
#endif
void
WorkerPrivate::GarbageCollectInternal(JSContext* aCx, bool aShrinking,
bool aCollectChildren)
{
AssertIsOnWorkerThread();
if (!GlobalScope()) {
// We haven't compiled anything yet. Just bail out.
return;
}
if (aShrinking || aCollectChildren) {
JSRuntime* rt = JS_GetRuntime(aCx);
JS::PrepareForFullGC(rt);
if (aShrinking) {
JS::GCForReason(rt, GC_SHRINK, JS::gcreason::DOM_WORKER);
if (!aCollectChildren) {
LOG(WorkerLog(), ("Worker %p collected idle garbage\n", this));
}
}
else {
JS::GCForReason(rt, GC_NORMAL, JS::gcreason::DOM_WORKER);
LOG(WorkerLog(), ("Worker %p collected garbage\n", this));
}
}
else {
JS_MaybeGC(aCx);
LOG(WorkerLog(), ("Worker %p collected periodic garbage\n", this));
}
if (aCollectChildren) {
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->GarbageCollect(aCx, aShrinking);
}
}
}
void
WorkerPrivate::CycleCollectInternal(JSContext* aCx, bool aCollectChildren)
{
AssertIsOnWorkerThread();
nsCycleCollector_collect(nullptr);
if (aCollectChildren) {
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->CycleCollect(aCx, /* dummy = */ false);
}
}
}
void
WorkerPrivate::SetThread(WorkerThread* aThread)
{
if (aThread) {
#ifdef DEBUG
{
bool isOnCurrentThread;
MOZ_ASSERT(NS_SUCCEEDED(aThread->IsOnCurrentThread(&isOnCurrentThread)));
MOZ_ASSERT(isOnCurrentThread);
}
#endif
MOZ_ASSERT(!mPRThread);
mPRThread = PRThreadFromThread(aThread);
MOZ_ASSERT(mPRThread);
}
else {
MOZ_ASSERT(mPRThread);
}
const WorkerThreadFriendKey friendKey;
RefPtr<WorkerThread> doomedThread;
{ // Scope so that |doomedThread| is released without holding the lock.
MutexAutoLock lock(mMutex);
if (aThread) {
MOZ_ASSERT(!mThread);
MOZ_ASSERT(mStatus == Pending);
mThread = aThread;
mThread->SetWorker(friendKey, this);
if (!mPreStartRunnables.IsEmpty()) {
for (uint32_t index = 0; index < mPreStartRunnables.Length(); index++) {
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(
mThread->DispatchAnyThread(friendKey, mPreStartRunnables[index].forget())));
}
mPreStartRunnables.Clear();
}
}
else {
MOZ_ASSERT(mThread);
mThread->SetWorker(friendKey, nullptr);
mThread.swap(doomedThread);
}
}
}
WorkerCrossThreadDispatcher*
WorkerPrivate::GetCrossThreadDispatcher()
{
MutexAutoLock lock(mMutex);
if (!mCrossThreadDispatcher && mStatus <= Running) {
mCrossThreadDispatcher = new WorkerCrossThreadDispatcher(this);
}
return mCrossThreadDispatcher;
}
void
WorkerPrivate::BeginCTypesCall()
{
AssertIsOnWorkerThread();
// Don't try to GC while we're blocked in a ctypes call.
SetGCTimerMode(NoTimer);
MutexAutoLock lock(mMutex);
NS_ASSERTION(!mBlockedForMemoryReporter,
"Can't be blocked in more than one place at the same time!");
// Let the main thread know that the worker is effectively blocked while in
// this ctypes call. It isn't technically true (obviously the call could do
// non-blocking things), but we're assuming that ctypes can't call back into
// JSAPI here and therefore any work the ctypes call does will not alter the
// data structures of this JS runtime.
mBlockedForMemoryReporter = true;
// The main thread may be waiting on us so it must be notified.
mMemoryReportCondVar.Notify();
}
void
WorkerPrivate::EndCTypesCall()
{
AssertIsOnWorkerThread();
{
MutexAutoLock lock(mMutex);
NS_ASSERTION(mBlockedForMemoryReporter, "Somehow we got unblocked!");
// Don't continue until the memory reporter has finished.
while (mMemoryReporterRunning) {
mMemoryReportCondVar.Wait();
}
// No need to notify the main thread here as it shouldn't be waiting to see
// this state.
mBlockedForMemoryReporter = false;
}
// Make sure the periodic timer is running before we start running JS again.
SetGCTimerMode(PeriodicTimer);
}
bool
WorkerPrivate::ConnectMessagePort(JSContext* aCx,
MessagePortIdentifier& aIdentifier)
{
AssertIsOnWorkerThread();
WorkerGlobalScope* globalScope = GlobalScope();
JS::Rooted<JSObject*> jsGlobal(aCx, globalScope->GetWrapper());
MOZ_ASSERT(jsGlobal);
// This MessagePortIdentifier is used to create a new port, still connected
// with the other one, but in the worker thread.
ErrorResult rv;
RefPtr<MessagePort> port = MessagePort::Create(nullptr, aIdentifier, rv);
if (NS_WARN_IF(rv.Failed())) {
return false;
}
GlobalObject globalObject(aCx, jsGlobal);
if (globalObject.Failed()) {
return false;
}
RootedDictionary<MessageEventInit> init(aCx);
init.mBubbles = false;
init.mCancelable = false;
init.mSource.SetValue().SetAsMessagePort() = port;
RefPtr<MessageEvent> event =
MessageEvent::Constructor(globalObject,
NS_LITERAL_STRING("connect"), init, rv);
event->SetTrusted(true);
nsTArray<RefPtr<MessagePort>> ports;
ports.AppendElement(port);
RefPtr<MessagePortList> portList =
new MessagePortList(static_cast<nsIDOMEventTarget*>(globalScope), ports);
event->SetPorts(portList);
nsCOMPtr<nsIDOMEvent> domEvent = do_QueryObject(event);
nsEventStatus dummy = nsEventStatus_eIgnore;
globalScope->DispatchDOMEvent(nullptr, domEvent, nullptr, &dummy);
return true;
}
WorkerGlobalScope*
WorkerPrivate::GetOrCreateGlobalScope(JSContext* aCx)
{
AssertIsOnWorkerThread();
if (!mScope) {
RefPtr<WorkerGlobalScope> globalScope;
if (IsSharedWorker()) {
globalScope = new SharedWorkerGlobalScope(this, WorkerName());
} else if (IsServiceWorker()) {
globalScope = new ServiceWorkerGlobalScope(this, WorkerName());
} else {
globalScope = new DedicatedWorkerGlobalScope(this);
}
JS::Rooted<JSObject*> global(aCx);
NS_ENSURE_TRUE(globalScope->WrapGlobalObject(aCx, &global), nullptr);
JSAutoCompartment ac(aCx, global);
// RegisterBindings() can spin a nested event loop so we have to set mScope
// before calling it, and we have to make sure to unset mScope if it fails.
mScope = Move(globalScope);
if (!RegisterBindings(aCx, global)) {
mScope = nullptr;
return nullptr;
}
JS_FireOnNewGlobalObject(aCx, global);
}
return mScope;
}
WorkerDebuggerGlobalScope*
WorkerPrivate::CreateDebuggerGlobalScope(JSContext* aCx)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!mDebuggerScope);
RefPtr<WorkerDebuggerGlobalScope> globalScope =
new WorkerDebuggerGlobalScope(this);
JS::Rooted<JSObject*> global(aCx);
NS_ENSURE_TRUE(globalScope->WrapGlobalObject(aCx, &global), nullptr);
JSAutoCompartment ac(aCx, global);
if (!JS_DefineDebuggerObject(aCx, global)) {
return nullptr;
}
JS_FireOnNewGlobalObject(aCx, global);
mDebuggerScope = globalScope.forget();
return mDebuggerScope;
}
#ifdef DEBUG
void
WorkerPrivate::AssertIsOnWorkerThread() const
{
// This is much more complicated than it needs to be but we can't use mThread
// because it must be protected by mMutex and sometimes this method is called
// when mMutex is already locked. This method should always work.
MOZ_ASSERT(mPRThread,
"AssertIsOnWorkerThread() called before a thread was assigned!");
MOZ_ASSERT(nsThreadManager::get());
nsCOMPtr<nsIThread> thread;
nsresult rv =
nsThreadManager::get()->GetThreadFromPRThread(mPRThread,
getter_AddRefs(thread));
MOZ_ASSERT(NS_SUCCEEDED(rv));
MOZ_ASSERT(thread);
bool current;
rv = thread->IsOnCurrentThread(&current);
MOZ_ASSERT(NS_SUCCEEDED(rv));
MOZ_ASSERT(current, "Wrong thread!");
}
#endif // DEBUG
NS_IMPL_ISUPPORTS_INHERITED0(ExternalRunnableWrapper, WorkerRunnable)
template <class Derived>
NS_IMPL_ADDREF(WorkerPrivateParent<Derived>::EventTarget)
template <class Derived>
NS_IMPL_RELEASE(WorkerPrivateParent<Derived>::EventTarget)
template <class Derived>
NS_INTERFACE_MAP_BEGIN(WorkerPrivateParent<Derived>::EventTarget)
NS_INTERFACE_MAP_ENTRY(nsIEventTarget)
NS_INTERFACE_MAP_ENTRY(nsISupports)
#ifdef DEBUG
// kDEBUGWorkerEventTargetIID is special in that it does not AddRef its
// result.
if (aIID.Equals(kDEBUGWorkerEventTargetIID)) {
*aInstancePtr = this;
return NS_OK;
}
else
#endif
NS_INTERFACE_MAP_END
template <class Derived>
NS_IMETHODIMP
WorkerPrivateParent<Derived>::
EventTarget::DispatchFromScript(nsIRunnable* aRunnable, uint32_t aFlags)
{
nsCOMPtr<nsIRunnable> event(aRunnable);
return Dispatch(event.forget(), aFlags);
}
template <class Derived>
NS_IMETHODIMP
WorkerPrivateParent<Derived>::
EventTarget::Dispatch(already_AddRefed<nsIRunnable>&& aRunnable, uint32_t aFlags)
{
// May be called on any thread!
nsCOMPtr<nsIRunnable> event(aRunnable);
// Workers only support asynchronous dispatch for now.
if (NS_WARN_IF(aFlags != NS_DISPATCH_NORMAL)) {
return NS_ERROR_UNEXPECTED;
}
RefPtr<WorkerRunnable> workerRunnable;
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
NS_WARNING("A runnable was posted to a worker that is already shutting "
"down!");
return NS_ERROR_UNEXPECTED;
}
if (event) {
workerRunnable = mWorkerPrivate->MaybeWrapAsWorkerRunnable(event.forget());
}
nsresult rv =
mWorkerPrivate->DispatchPrivate(workerRunnable.forget(), mNestedEventTarget);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
template <class Derived>
NS_IMETHODIMP
WorkerPrivateParent<Derived>::
EventTarget::IsOnCurrentThread(bool* aIsOnCurrentThread)
{
// May be called on any thread!
MOZ_ASSERT(aIsOnCurrentThread);
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
NS_WARNING("A worker's event target was used after the worker has !");
return NS_ERROR_UNEXPECTED;
}
nsresult rv = mWorkerPrivate->IsOnCurrentThread(aIsOnCurrentThread);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
BEGIN_WORKERS_NAMESPACE
WorkerCrossThreadDispatcher*
GetWorkerCrossThreadDispatcher(JSContext* aCx, JS::Value aWorker)
{
if (!aWorker.isObject()) {
return nullptr;
}
WorkerPrivate* w = nullptr;
UNWRAP_OBJECT(Worker, &aWorker.toObject(), w);
MOZ_ASSERT(w);
return w->GetCrossThreadDispatcher();
}
// Force instantiation.
template class WorkerPrivateParent<WorkerPrivate>;
END_WORKERS_NAMESPACE
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