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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 "nsIDocument.h"
#include "nsIDocShell.h"
#include "nsIInterfaceRequestor.h"
#include "nsIMemoryReporter.h"
#include "nsINamed.h"
#include "nsINetworkInterceptController.h"
#include "nsIPermissionManager.h"
#include "nsIScriptError.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptSecurityManager.h"
#include "nsIScriptTimeoutHandler.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 "nsPIDOMWindow.h"
#include "nsGlobalWindow.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/Move.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/Console.h"
#include "mozilla/dom/DocGroup.h"
#include "mozilla/dom/ErrorEvent.h"
#include "mozilla/dom/ErrorEventBinding.h"
#include "mozilla/dom/Exceptions.h"
#include "mozilla/dom/ExtendableMessageEventBinding.h"
#include "mozilla/dom/FunctionBinding.h"
#include "mozilla/dom/IndexedDatabaseManager.h"
#include "mozilla/dom/MessageEvent.h"
#include "mozilla/dom/MessageEventBinding.h"
#include "mozilla/dom/MessagePort.h"
#include "mozilla/dom/MessagePortBinding.h"
#include "mozilla/dom/nsCSPUtils.h"
#include "mozilla/dom/Performance.h"
#include "mozilla/dom/PMessagePort.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PromiseDebugging.h"
#include "mozilla/dom/PromiseNativeHandler.h"
#include "mozilla/dom/SimpleGlobalObject.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/Preferences.h"
#include "mozilla/ThreadEventQueue.h"
#include "mozilla/ThrottledEventQueue.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 "nsScriptError.h"
#include "nsUTF8Utils.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 "ServiceWorkerEvents.h"
#include "ServiceWorkerManager.h"
#include "SharedWorker.h"
#include "WorkerDebuggerManager.h"
#include "WorkerHolder.h"
#include "WorkerNavigator.h"
#include "WorkerRunnable.h"
#include "WorkerScope.h"
#include "WorkerThread.h"
// 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<nsIRunnable> mWrappedRunnable;
public:
ExternalRunnableWrapper(WorkerPrivate* aWorkerPrivate,
nsIRunnable* aWrappedRunnable)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mWrappedRunnable(aWrappedRunnable)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aWrappedRunnable);
}
NS_DECL_ISUPPORTS_INHERITED
private:
~ExternalRunnableWrapper()
{ }
virtual bool
PreDispatch(WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(WorkerPrivate* aWorkerPrivate, bool aDispatchResult) override
{
// Silence bad assertions.
}
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;
}
nsresult
Cancel() override
{
nsresult rv;
nsCOMPtr<nsICancelableRunnable> cancelable =
do_QueryInterface(mWrappedRunnable);
MOZ_ASSERT(cancelable); // We checked this earlier!
rv = cancelable->Cancel();
nsresult rv2 = WorkerRunnable::Cancel();
return NS_FAILED(rv) ? rv : rv2;
}
};
struct WindowAction
{
nsPIDOMWindowInner* mWindow;
bool mDefaultAction;
MOZ_IMPLICIT WindowAction(nsPIDOMWindowInner* aWindow)
: mWindow(aWindow), mDefaultAction(true)
{ }
bool
operator==(const WindowAction& aOther) const
{
return mWindow == aOther.mWindow;
}
};
void
LogErrorToConsole(const WorkerErrorReport& aReport, uint64_t aInnerWindowId)
{
AssertIsOnMainThread();
RefPtr<nsScriptErrorBase> scriptError = new nsScriptError();
NS_WARNING_ASSERTION(scriptError, "Failed to create script error!");
if (scriptError) {
nsAutoCString category("Web Worker");
if (NS_FAILED(scriptError->InitWithWindowID(aReport.mMessage,
aReport.mFilename,
aReport.mLine,
aReport.mLineNumber,
aReport.mColumnNumber,
aReport.mFlags,
category,
aInnerWindowId))) {
NS_WARNING("Failed to init script error!");
scriptError = nullptr;
}
for (size_t i = 0, len = aReport.mNotes.Length(); i < len; i++) {
const WorkerErrorNote& note = aReport.mNotes.ElementAt(i);
nsScriptErrorNote* noteObject = new nsScriptErrorNote();
noteObject->Init(note.mMessage, note.mFilename,
note.mLineNumber, note.mColumnNumber);
scriptError->AddNote(noteObject);
}
}
nsCOMPtr<nsIConsoleService> consoleService =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
NS_WARNING_ASSERTION(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(
aReport.mMessage.BeginReading()))) {
return;
}
NS_WARNING("LogStringMessage failed!");
}
NS_ConvertUTF16toUTF8 msg(aReport.mMessage);
NS_ConvertUTF16toUTF8 filename(aReport.mFilename);
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(), aReport.mLineNumber);
#endif
fprintf(stderr, kErrorString, msg.get(), filename.get(), aReport.mLineNumber);
fflush(stderr);
}
class MainThreadReleaseRunnable final : public Runnable
{
nsTArray<nsCOMPtr<nsISupports>> mDoomed;
nsCOMPtr<nsILoadGroup> mLoadGroupToCancel;
public:
MainThreadReleaseRunnable(nsTArray<nsCOMPtr<nsISupports>>& aDoomed,
nsCOMPtr<nsILoadGroup>& aLoadGroupToCancel)
: mozilla::Runnable("MainThreadReleaseRunnable")
{
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(WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(WorkerPrivate* aWorkerPrivate, bool aDispatchResult) override
{
// Silence bad assertions.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
if (!mFinishedWorker->ProxyReleaseMainThreadObjects()) {
NS_WARNING("Failed to dispatch, going to leak!");
}
RuntimeService* runtime = RuntimeService::GetService();
NS_ASSERTION(runtime, "This should never be null!");
mFinishedWorker->DisableDebugger();
runtime->UnregisterWorker(mFinishedWorker);
mFinishedWorker->ClearSelfRef();
return true;
}
};
class TopLevelWorkerFinishedRunnable final : public Runnable
{
WorkerPrivate* mFinishedWorker;
public:
explicit TopLevelWorkerFinishedRunnable(WorkerPrivate* aFinishedWorker)
: mozilla::Runnable("TopLevelWorkerFinishedRunnable")
, mFinishedWorker(aFinishedWorker)
{
aFinishedWorker->AssertIsOnWorkerThread();
}
NS_DECL_ISUPPORTS_INHERITED
private:
~TopLevelWorkerFinishedRunnable() {}
NS_IMETHOD
Run() override
{
AssertIsOnMainThread();
RuntimeService* runtime = RuntimeService::GetService();
MOZ_ASSERT(runtime);
mFinishedWorker->DisableDebugger();
runtime->UnregisterWorker(mFinishedWorker);
if (!mFinishedWorker->ProxyReleaseMainThreadObjects()) {
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(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 ReportCompileErrorRunnable final : public WorkerRunnable
{
public:
static void
CreateAndDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
RefPtr<ReportCompileErrorRunnable> runnable =
new ReportCompileErrorRunnable(aCx, aWorkerPrivate);
runnable->Dispatch();
}
private:
ReportCompileErrorRunnable(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount)
{
aWorkerPrivate->AssertIsOnWorkerThread();
}
void
PostDispatch(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.
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
if (aWorkerPrivate->IsFrozen() ||
aWorkerPrivate->IsParentWindowPaused()) {
MOZ_ASSERT(!IsDebuggerRunnable());
aWorkerPrivate->QueueRunnable(this);
return true;
}
if (aWorkerPrivate->IsSharedWorker()) {
aWorkerPrivate->BroadcastErrorToSharedWorkers(aCx, nullptr,
/* isErrorEvent */ false);
return true;
}
if (aWorkerPrivate->IsServiceWorker()) {
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (swm) {
swm->HandleError(aCx, aWorkerPrivate->GetPrincipal(),
aWorkerPrivate->ServiceWorkerScope(),
aWorkerPrivate->ScriptURL(),
EmptyString(), EmptyString(), EmptyString(),
0, 0, JSREPORT_ERROR, JSEXN_ERR);
}
return true;
}
if (!aWorkerPrivate->IsAcceptingEvents()) {
return true;
}
RefPtr<Event> event =
Event::Constructor(aWorkerPrivate, NS_LITERAL_STRING("error"),
EventInit());
event->SetTrusted(true);
bool dummy;
aWorkerPrivate->DispatchEvent(event, &dummy);
return true;
}
};
class CompileScriptRunnable final : public WorkerRunnable
{
nsString mScriptURL;
public:
explicit CompileScriptRunnable(WorkerPrivate* aWorkerPrivate,
const nsAString& aScriptURL)
: WorkerRunnable(aWorkerPrivate),
mScriptURL(aScriptURL)
{ }
private:
// We can't implement PreRun effectively, because at the point when that would
// run we have not yet done our load so don't know things like our final
// principal and whatnot.
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->AssertIsOnWorkerThread();
ErrorResult rv;
scriptloader::LoadMainScript(aWorkerPrivate, mScriptURL, WorkerScript, rv);
rv.WouldReportJSException();
// Explicitly ignore NS_BINDING_ABORTED on rv. Or more precisely, still
// return false and don't SetWorkerScriptExecutedSuccessfully() in that
// case, but don't throw anything on aCx. The idea is to not dispatch error
// events if our load is canceled with that error code.
if (rv.ErrorCodeIs(NS_BINDING_ABORTED)) {
rv.SuppressException();
return false;
}
WorkerGlobalScope* globalScope = aWorkerPrivate->GlobalScope();
if (NS_WARN_IF(!globalScope)) {
// We never got as far as calling GetOrCreateGlobalScope, or it failed.
// We have no way to enter a compartment, hence no sane way to report this
// error. :(
rv.SuppressException();
return false;
}
// Make sure to propagate exceptions from rv onto aCx, so that they will get
// reported after we return. We want to propagate just JS exceptions,
// because all the other errors are handled when the script is loaded.
// See: https://dom.spec.whatwg.org/#concept-event-fire
if (rv.Failed() && !rv.IsJSException()) {
ReportCompileErrorRunnable::CreateAndDispatch(aCx, aWorkerPrivate);
rv.SuppressException();
return false;
}
// This is a little dumb, but aCx is in the null compartment here because we
// set it up that way in our Run(), since we had not created the global at
// that point yet. So we need to enter the compartment of our global,
// because setting a pending exception on aCx involves wrapping into its
// current compartment. Luckily we have a global now.
JSAutoCompartment ac(aCx, globalScope->GetGlobalJSObject());
if (rv.MaybeSetPendingException(aCx)) {
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
{
aWorkerPrivate->AssertIsOnWorkerThread();
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(aWorkerPrivate, mScriptURL,
DebuggerScript, rv);
rv.WouldReportJSException();
// Explicitly ignore NS_BINDING_ABORTED on rv. Or more precisely, still
// return false and don't SetWorkerScriptExecutedSuccessfully() in that
// case, but don't throw anything on aCx. The idea is to not dispatch error
// events if our load is canceled with that error code.
if (rv.ErrorCodeIs(NS_BINDING_ABORTED)) {
rv.SuppressException();
return false;
}
// Make sure to propagate exceptions from rv onto aCx, so that they will get
// reported after we return. We do this for all failures on rv, because now
// we're using rv to track all the state we care about.
if (rv.MaybeSetPendingException(aCx)) {
return false;
}
return true;
}
};
class MessageEventRunnable final : public WorkerRunnable
, public StructuredCloneHolder
{
public:
MessageEventRunnable(WorkerPrivate* aWorkerPrivate,
TargetAndBusyBehavior aBehavior)
: WorkerRunnable(aWorkerPrivate, aBehavior)
, StructuredCloneHolder(CloningSupported, TransferringSupported,
StructuredCloneScope::SameProcessDifferentThread)
{
}
bool
DispatchDOMEvent(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
DOMEventTargetHelper* aTarget, bool aIsMainThread)
{
nsCOMPtr<nsIGlobalObject> parent = do_QueryInterface(aTarget->GetParentObject());
// For some workers without window, parent is null and we try to find it
// from the JS Context.
if (!parent) {
JS::Rooted<JSObject*> globalObject(aCx, JS::CurrentGlobalOrNull(aCx));
if (NS_WARN_IF(!globalObject)) {
return false;
}
parent = xpc::NativeGlobal(globalObject);
if (NS_WARN_IF(!parent)) {
return false;
}
}
MOZ_ASSERT(parent);
JS::Rooted<JS::Value> messageData(aCx);
IgnoredErrorResult 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())) {
DispatchError(aCx, aTarget);
return false;
}
Sequence<OwningNonNull<MessagePort>> ports;
if (!TakeTransferredPortsAsSequence(ports)) {
DispatchError(aCx, aTarget);
return false;
}
nsCOMPtr<nsIDOMEvent> domEvent;
RefPtr<MessageEvent> event = new MessageEvent(aTarget, nullptr, nullptr);
event->InitMessageEvent(nullptr,
NS_LITERAL_STRING("message"),
false /* non-bubbling */,
false /* cancelable */,
messageData,
EmptyString(),
EmptyString(),
nullptr,
ports);
domEvent = do_QueryObject(event);
domEvent->SetTrusted(true);
bool dummy;
aTarget->DispatchEvent(domEvent, &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->IsParentWindowPaused()) {
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);
}
void
DispatchError(JSContext* aCx, DOMEventTargetHelper* aTarget)
{
RootedDictionary<MessageEventInit> init(aCx);
init.mBubbles = false;
init.mCancelable = false;
RefPtr<Event> event =
MessageEvent::Constructor(aTarget, NS_LITERAL_STRING("messageerror"), init);
event->SetTrusted(true);
bool dummy;
aTarget->DispatchEvent(event, &dummy);
}
};
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);
event->InitMessageEvent(nullptr,
NS_LITERAL_STRING("message"),
false, // canBubble
true, // cancelable
data,
EmptyString(),
EmptyString(),
nullptr,
Sequence<OwningNonNull<MessagePort>>());
event->SetTrusted(true);
nsCOMPtr<nsIDOMEvent> domEvent = do_QueryObject(event);
bool dummy;
globalScope->DispatchEvent(domEvent, &dummy);
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(WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->AssertIsOnParentThread();
return aWorkerPrivate->ModifyBusyCount(true);
}
virtual void
PostDispatch(WorkerPrivate* aWorkerPrivate, bool aDispatchResult) override
{
aWorkerPrivate->AssertIsOnParentThread();
if (!aDispatchResult) {
// We couldn't dispatch to the worker, which means it's already dead.
// Undo the busy count modification.
aWorkerPrivate->ModifyBusyCount(false);
}
}
virtual void
PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate, bool aRunResult)
override
{
aWorkerPrivate->ModifyBusyCountFromWorker(false);
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
bool ok = aWorkerPrivate->NotifyInternal(aCx, mStatus);
MOZ_ASSERT(!JS_IsExceptionPending(aCx));
return ok;
}
};
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();
}
};
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();
}
};
class ReportErrorToConsoleRunnable final : public WorkerRunnable
{
const char* mMessage;
public:
// aWorkerPrivate is the worker thread we're on (or the main thread, if null)
static void
Report(WorkerPrivate* aWorkerPrivate, const char* aMessage)
{
if (aWorkerPrivate) {
aWorkerPrivate->AssertIsOnWorkerThread();
} else {
AssertIsOnMainThread();
}
// Now fire a runnable to do the same on the parent's thread if we can.
if (aWorkerPrivate) {
RefPtr<ReportErrorToConsoleRunnable> runnable =
new ReportErrorToConsoleRunnable(aWorkerPrivate, aMessage);
runnable->Dispatch();
return;
}
// Log a warning to the console.
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("DOM"),
nullptr,
nsContentUtils::eDOM_PROPERTIES,
aMessage);
}
private:
ReportErrorToConsoleRunnable(WorkerPrivate* aWorkerPrivate, const char* aMessage)
: WorkerRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount),
mMessage(aMessage)
{ }
virtual void
PostDispatch(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
{
WorkerPrivate* parent = aWorkerPrivate->GetParent();
MOZ_ASSERT_IF(!parent, NS_IsMainThread());
Report(parent, mMessage);
return true;
}
};
class ReportErrorRunnable final : public WorkerRunnable
{
WorkerErrorReport mReport;
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 void
ReportError(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aFireAtScope, WorkerPrivate* aTarget,
const WorkerErrorReport& aReport, uint64_t aInnerWindowId,
JS::Handle<JS::Value> aException = JS::NullHandleValue)
{
if (aWorkerPrivate) {
aWorkerPrivate->AssertIsOnWorkerThread();
} else {
AssertIsOnMainThread();
}
// We should not fire error events for warnings but instead make sure that
// they show up in the error console.
if (!JSREPORT_IS_WARNING(aReport.mFlags)) {
// First fire an ErrorEvent at the worker.
RootedDictionary<ErrorEventInit> init(aCx);
if (aReport.mMutedError) {
init.mMessage.AssignLiteral("Script error.");
} else {
init.mMessage = aReport.mMessage;
init.mFilename = aReport.mFilename;
init.mLineno = aReport.mLineNumber;
init.mError = aException;
}
init.mCancelable = true;
init.mBubbles = false;
if (aTarget) {
RefPtr<ErrorEvent> event =
ErrorEvent::Constructor(aTarget, NS_LITERAL_STRING("error"), init);
event->SetTrusted(true);
bool defaultActionEnabled;
aTarget->DispatchEvent(event, &defaultActionEnabled);
if (!defaultActionEnabled) {
return;
}
}
// 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.
// XXXbz the interaction of this with worker errors seems kinda broken.
// An overrecursion in the debugger or debugger sandbox will get turned
// into an error event on our parent worker!
// https://bugzilla.mozilla.org/show_bug.cgi?id=1271441 tracks making this
// better.
if (aFireAtScope &&
(aTarget || aReport.mErrorNumber != 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_OBJECT(WorkerGlobalScope, &global, globalScope);
if (!globalScope) {
WorkerDebuggerGlobalScope* globalScope = nullptr;
UNWRAP_OBJECT(WorkerDebuggerGlobalScope, &global, globalScope);
MOZ_ASSERT_IF(globalScope, globalScope->GetWrapperPreserveColor() == global);
if (globalScope || IsDebuggerSandbox(global)) {
aWorkerPrivate->ReportErrorToDebugger(aReport.mFilename, aReport.mLineNumber,
aReport.mMessage);
return;
}
MOZ_ASSERT(SimpleGlobalObject::SimpleGlobalType(global) ==
SimpleGlobalObject::GlobalType::BindingDetail);
// XXXbz We should really log this to console, but unwinding out of
// this stuff without ending up firing any events is ... hard. Just
// return for now.
// https://bugzilla.mozilla.org/show_bug.cgi?id=1271441 tracks
// making this better.
return;
}
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;
}
}
}
// Now fire a runnable to do the same on the parent's thread if we can.
if (aWorkerPrivate) {
RefPtr<ReportErrorRunnable> runnable =
new ReportErrorRunnable(aWorkerPrivate, aReport);
runnable->Dispatch();
return;
}
// Otherwise log an error to the error console.
LogErrorToConsole(aReport, aInnerWindowId);
}
private:
ReportErrorRunnable(WorkerPrivate* aWorkerPrivate,
const WorkerErrorReport& aReport)
: WorkerRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount),
mReport(aReport)
{ }
virtual void
PostDispatch(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->IsParentWindowPaused()) {
MOZ_ASSERT(!IsDebuggerRunnable());
aWorkerPrivate->QueueRunnable(this);
return true;
}
if (aWorkerPrivate->IsSharedWorker()) {
aWorkerPrivate->BroadcastErrorToSharedWorkers(aCx, &mReport,
/* isErrorEvent */ true);
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();
if (swm) {
swm->HandleError(aCx, aWorkerPrivate->GetPrincipal(),
aWorkerPrivate->ServiceWorkerScope(),
aWorkerPrivate->ScriptURL(),
mReport.mMessage,
mReport.mFilename, mReport.mLine, mReport.mLineNumber,
mReport.mColumnNumber, mReport.mFlags,
mReport.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;
}
ReportError(aCx, parent, fireAtScope, aWorkerPrivate, mReport,
innerWindowId);
return true;
}
};
class TimerRunnable final : public WorkerRunnable,
public nsITimerCallback,
public nsINamed
{
public:
NS_DECL_ISUPPORTS_INHERITED
explicit TimerRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
~TimerRunnable() {}
virtual bool
PreDispatch(WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(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_IMETHOD
GetName(nsACString& aName) override
{
aName.AssignLiteral("TimerRunnable");
return NS_OK;
}
};
NS_IMPL_ISUPPORTS_INHERITED(TimerRunnable, WorkerRunnable, nsITimerCallback,
nsINamed)
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(WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(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::ObjectOrNullValue(mHandler->CallableOrNull()));
JS::HandleValueArray args = JS::HandleValueArray::empty();
JS::Rooted<JS::Value> rval(aCx);
if (!JS_CallFunctionValue(aCx, global, callable, args, &rval)) {
// Just return false; WorkerRunnable::Run will report the exception.
return false;
}
return true;
}
};
void
PeriodicGCTimerCallback(nsITimer* aTimer, void* aClosure)
{
auto workerPrivate = static_cast<WorkerPrivate*>(aClosure);
MOZ_DIAGNOSTIC_ASSERT(workerPrivate);
workerPrivate->AssertIsOnWorkerThread();
workerPrivate->GarbageCollectInternal(workerPrivate->GetJSContext(),
false /* shrinking */,
false /* collect children */);
}
void
IdleGCTimerCallback(nsITimer* aTimer, void* aClosure)
{
auto workerPrivate = static_cast<WorkerPrivate*>(aClosure);
MOZ_DIAGNOSTIC_ASSERT(workerPrivate);
workerPrivate->AssertIsOnWorkerThread();
workerPrivate->GarbageCollectInternal(workerPrivate->GetJSContext(),
true /* shrinking */,
false /* collect children */);
}
class UpdateContextOptionsRunnable final : public WorkerControlRunnable
{
JS::ContextOptions mContextOptions;
public:
UpdateContextOptionsRunnable(WorkerPrivate* aWorkerPrivate,
const JS::ContextOptions& aContextOptions)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mContextOptions(aContextOptions)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->UpdateContextOptionsInternal(aCx, mContextOptions);
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(mPref, mValue);
return true;
}
};
class UpdateLanguagesRunnable final : public WorkerRunnable
{
nsTArray<nsString> mLanguages;
public:
UpdateLanguagesRunnable(WorkerPrivate* aWorkerPrivate,
const nsTArray<nsString>& aLanguages)
: WorkerRunnable(aWorkerPrivate),
mLanguages(aLanguages)
{ }
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
aWorkerPrivate->UpdateLanguagesInternal(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(WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions, this can be dispatched from either the main
// thread or the timer thread..
return true;
}
virtual void
PostDispatch(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(mCollectChildren);
return true;
}
};
class OfflineStatusChangeRunnable : public WorkerRunnable
{
public:
OfflineStatusChangeRunnable(WorkerPrivate* aWorkerPrivate, bool aIsOffline)
: WorkerRunnable(aWorkerPrivate),
mIsOffline(aIsOffline)
{
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
aWorkerPrivate->OfflineStatusChangeEventInternal(mIsOffline);
return true;
}
private:
bool mIsOffline;
};
class MemoryPressureRunnable : public WorkerControlRunnable
{
public:
explicit MemoryPressureRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
aWorkerPrivate->MemoryPressureInternal();
return true;
}
};
#ifdef DEBUG
static bool
StartsWithExplicit(nsACString& s)
{
return StringBeginsWith(s, NS_LITERAL_CSTRING("explicit/"));
}
#endif
class MessagePortRunnable final : public WorkerRunnable
{
MessagePortIdentifier mPortIdentifier;
public:
MessagePortRunnable(WorkerPrivate* aWorkerPrivate, MessagePort* aPort)
: WorkerRunnable(aWorkerPrivate)
{
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);
}
nsresult
Cancel() override
{
MessagePort::ForceClose(mPortIdentifier);
return WorkerRunnable::Cancel();
}
};
PRThread*
PRThreadFromThread(nsIThread* aThread)
{
MOZ_ASSERT(aThread);
PRThread* result;
MOZ_ALWAYS_SUCCEEDS(aThread->GetPRThread(&result));
MOZ_ASSERT(result);
return result;
}
class SimpleWorkerHolder final : public WorkerHolder
{
public:
virtual bool Notify(Status aStatus) { return true; }
};
} /* anonymous namespace */
NS_IMPL_ISUPPORTS_INHERITED0(MainThreadReleaseRunnable, Runnable)
NS_IMPL_ISUPPORTS_INHERITED0(TopLevelWorkerFinishedRunnable, Runnable)
namespace {
class WrappedControlRunnable final : public WorkerControlRunnable
{
nsCOMPtr<nsIRunnable> mInner;
~WrappedControlRunnable()
{
}
public:
WrappedControlRunnable(WorkerPrivate* aWorkerPrivate,
already_AddRefed<nsIRunnable>&& aInner)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
, mInner(aInner)
{
}
virtual bool
PreDispatch(WorkerPrivate* aWorkerPrivate) override
{
// Silence bad assertions, this can be dispatched from any thread.
return true;
}
virtual void
PostDispatch(WorkerPrivate* aWorkerPrivate, bool aDispatchResult) override
{
// Silence bad assertions, this can be dispatched from any thread.
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
{
mInner->Run();
return true;
}
nsresult
Cancel() override
{
nsCOMPtr<nsICancelableRunnable> cr = do_QueryInterface(mInner);
// If the inner runnable is not cancellable, then just do the normal
// WorkerControlRunnable thing. This will end up calling Run().
if (!cr) {
WorkerControlRunnable::Cancel();
return NS_OK;
}
// Otherwise call the inner runnable's Cancel() and treat this like
// a WorkerRunnable cancel. We can't call WorkerControlRunnable::Cancel()
// in this case since that would result in both Run() and the inner
// Cancel() being called.
Unused << cr->Cancel();
return WorkerRunnable::Cancel();
}
};
} // anonymous namespace
BEGIN_WORKERS_NAMESPACE
class WorkerEventTarget final : public nsISerialEventTarget
{
public:
// The WorkerEventTarget supports different dispatch behaviors:
//
// * Hybrid targets will attempt to dispatch as a normal runnable,
// but fallback to a control runnable if that fails. This is
// often necessary for code that wants normal dispatch order, but
// also needs to execute while the worker is shutting down (possibly
// with a holder in place.)
//
// * ControlOnly targets will simply dispatch a control runnable.
enum class Behavior : uint8_t {
Hybrid,
ControlOnly
};
private:
mozilla::Mutex mMutex;
WorkerPrivate* mWorkerPrivate;
const Behavior mBehavior;
~WorkerEventTarget() = default;
public:
WorkerEventTarget(WorkerPrivate* aWorkerPrivate,
Behavior aBehavior)
: mMutex("WorkerEventTarget")
, mWorkerPrivate(aWorkerPrivate)
, mBehavior(aBehavior)
{
MOZ_DIAGNOSTIC_ASSERT(mWorkerPrivate);
}
void
ForgetWorkerPrivate(WorkerPrivate* aWorkerPrivate)
{
MutexAutoLock lock(mMutex);
MOZ_DIAGNOSTIC_ASSERT(!mWorkerPrivate || mWorkerPrivate == aWorkerPrivate);
mWorkerPrivate = nullptr;
}
NS_IMETHOD
DispatchFromScript(nsIRunnable* aRunnable, uint32_t aFlags) override
{
nsCOMPtr<nsIRunnable> runnable(aRunnable);
return Dispatch(runnable.forget(), aFlags);
}
NS_IMETHOD
Dispatch(already_AddRefed<nsIRunnable> aRunnable, uint32_t aFlags = NS_DISPATCH_NORMAL) override
{
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIRunnable> runnable(aRunnable);
if (mBehavior == Behavior::Hybrid) {
RefPtr<WorkerRunnable> r =
mWorkerPrivate->MaybeWrapAsWorkerRunnable(runnable.forget());
if (r->Dispatch()) {
return NS_OK;
}
runnable = r.forget();
}
RefPtr<WorkerControlRunnable> r = new WrappedControlRunnable(mWorkerPrivate,
runnable.forget());
if (!r->Dispatch()) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHOD
DelayedDispatch(already_AddRefed<nsIRunnable>, uint32_t) override
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHOD_(bool) IsOnCurrentThreadInfallible() override
{
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
return false;
}
return mWorkerPrivate->IsOnCurrentThread();
}
NS_IMETHOD
IsOnCurrentThread(bool* aIsOnCurrentThread) override
{
MOZ_ASSERT(aIsOnCurrentThread);
*aIsOnCurrentThread = IsOnCurrentThreadInfallible();
return NS_OK;
}
NS_DECL_THREADSAFE_ISUPPORTS
};
NS_IMPL_ISUPPORTS(WorkerEventTarget, nsIEventTarget,
nsISerialEventTarget)
END_WORKERS_NAMESPACE
WorkerLoadInfo::WorkerLoadInfo()
: mLoadFlags(nsIRequest::LOAD_NORMAL)
, mWindowID(UINT64_MAX)
, mServiceWorkerID(0)
, mReferrerPolicy(net::RP_Unset)
, mFromWindow(false)
, mEvalAllowed(false)
, mReportCSPViolations(false)
, mXHRParamsAllowed(false)
, mPrincipalIsSystem(false)
, mStorageAllowed(false)
, 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;
mOrigin = aOther.mOrigin;
mServiceWorkerCacheName = aOther.mServiceWorkerCacheName;
mLoadFlags = aOther.mLoadFlags;
mWindowID = aOther.mWindowID;
mServiceWorkerID = aOther.mServiceWorkerID;
mReferrerPolicy = aOther.mReferrerPolicy;
mFromWindow = aOther.mFromWindow;
mEvalAllowed = aOther.mEvalAllowed;
mReportCSPViolations = aOther.mReportCSPViolations;
mXHRParamsAllowed = aOther.mXHRParamsAllowed;
mPrincipalIsSystem = aOther.mPrincipalIsSystem;
mStorageAllowed = aOther.mStorageAllowed;
mServiceWorkersTestingInWindow = aOther.mServiceWorkersTestingInWindow;
mOriginAttributes = aOther.mOriginAttributes;
}
nsresult
WorkerLoadInfo::SetPrincipalOnMainThread(nsIPrincipal* aPrincipal,
nsILoadGroup* aLoadGroup)
{
AssertIsOnMainThread();
MOZ_ASSERT(NS_LoadGroupMatchesPrincipal(aLoadGroup, aPrincipal));
mPrincipal = aPrincipal;
mPrincipalIsSystem = nsContentUtils::IsSystemPrincipal(aPrincipal);
nsresult rv = aPrincipal->GetCsp(getter_AddRefs(mCSP));
NS_ENSURE_SUCCESS(rv, rv);
if (mCSP) {
mCSP->GetAllowsEval(&mReportCSPViolations, &mEvalAllowed);
// Set ReferrerPolicy
bool hasReferrerPolicy = false;
uint32_t rp = mozilla::net::RP_Unset;
rv = mCSP->GetReferrerPolicy(&rp, &hasReferrerPolicy);
NS_ENSURE_SUCCESS(rv, rv);
if (hasReferrerPolicy) {
mReferrerPolicy = static_cast<net::ReferrerPolicy>(rp);
}
} else {
mEvalAllowed = true;
mReportCSPViolations = false;
}
mLoadGroup = aLoadGroup;
mPrincipalInfo = new PrincipalInfo();
mOriginAttributes = nsContentUtils::GetOriginAttributes(aLoadGroup);
rv = PrincipalToPrincipalInfo(aPrincipal, mPrincipalInfo);
NS_ENSURE_SUCCESS(rv, rv);
rv = nsContentUtils::GetUTFOrigin(aPrincipal, mOrigin);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
WorkerLoadInfo::GetPrincipalAndLoadGroupFromChannel(nsIChannel* aChannel,
nsIPrincipal** aPrincipalOut,
nsILoadGroup** aLoadGroupOut)
{
AssertIsOnMainThread();
MOZ_DIAGNOSTIC_ASSERT(aChannel);
MOZ_DIAGNOSTIC_ASSERT(aPrincipalOut);
MOZ_DIAGNOSTIC_ASSERT(aLoadGroupOut);
// Initial triggering principal should be set
MOZ_DIAGNOSTIC_ASSERT(mPrincipal);
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
MOZ_DIAGNOSTIC_ASSERT(ssm);
nsCOMPtr<nsIPrincipal> channelPrincipal;
nsresult rv = ssm->GetChannelResultPrincipal(aChannel, getter_AddRefs(channelPrincipal));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsILoadGroup> channelLoadGroup;
rv = aChannel->GetLoadGroup(getter_AddRefs(channelLoadGroup));
NS_ENSURE_SUCCESS(rv, rv);
MOZ_ASSERT(channelLoadGroup);
// If the load principal is the system principal then the channel
// principal must also be the system principal (we do not allow chrome
// code to create workers with non-chrome scripts, and if we ever decide
// to change this we need to make sure we don't always set
// mPrincipalIsSystem to true in WorkerPrivate::GetLoadInfo()). Otherwise
// this channel principal must be same origin with the load principal (we
// check again here in case redirects changed the location of the script).
if (nsContentUtils::IsSystemPrincipal(mPrincipal)) {
if (!nsContentUtils::IsSystemPrincipal(channelPrincipal)) {
nsCOMPtr<nsIURI> finalURI;
rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(finalURI));
NS_ENSURE_SUCCESS(rv, rv);
// See if this is a resource URI. Since JSMs usually come from
// resource:// URIs we're currently considering all URIs with the
// URI_IS_UI_RESOURCE flag as valid for creating privileged workers.
bool isResource;
rv = NS_URIChainHasFlags(finalURI,
nsIProtocolHandler::URI_IS_UI_RESOURCE,
&isResource);
NS_ENSURE_SUCCESS(rv, rv);
if (isResource) {
// Assign the system principal to the resource:// worker only if it
// was loaded from code using the system principal.
channelPrincipal = mPrincipal;
} else {
return NS_ERROR_DOM_BAD_URI;
}
}
}
// The principal can change, but it should still match the original
// load group's appId and browser element flag.
MOZ_ASSERT(NS_LoadGroupMatchesPrincipal(channelLoadGroup, channelPrincipal));
channelPrincipal.forget(aPrincipalOut);
channelLoadGroup.forget(aLoadGroupOut);
return NS_OK;
}
nsresult
WorkerLoadInfo::SetPrincipalFromChannel(nsIChannel* aChannel)
{
AssertIsOnMainThread();
nsCOMPtr<nsIPrincipal> principal;
nsCOMPtr<nsILoadGroup> loadGroup;
nsresult rv = GetPrincipalAndLoadGroupFromChannel(aChannel,
getter_AddRefs(principal),
getter_AddRefs(loadGroup));
NS_ENSURE_SUCCESS(rv, rv);
return SetPrincipalOnMainThread(principal, loadGroup);
}
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
bool
WorkerLoadInfo::FinalChannelPrincipalIsValid(nsIChannel* aChannel)
{
AssertIsOnMainThread();
nsCOMPtr<nsIPrincipal> principal;
nsCOMPtr<nsILoadGroup> loadGroup;
nsresult rv = GetPrincipalAndLoadGroupFromChannel(aChannel,
getter_AddRefs(principal),
getter_AddRefs(loadGroup));
NS_ENSURE_SUCCESS(rv, false);
// Verify that the channel is still a null principal. We don't care
// if these are the exact same null principal object, though. From
// the worker's perspective its the same effect.
if (principal->GetIsNullPrincipal() && mPrincipal->GetIsNullPrincipal()) {
return true;
}
// Otherwise we require exact equality. Redirects can happen, but they
// are not allowed to change our principal.
if (principal->Equals(mPrincipal)) {
return true;
}
return false;
}
bool
WorkerLoadInfo::PrincipalIsValid() const
{
return mPrincipal && mPrincipalInfo &&
mPrincipalInfo->type() != PrincipalInfo::T__None &&
mPrincipalInfo->type() <= PrincipalInfo::T__Last;
}
bool
WorkerLoadInfo::PrincipalURIMatchesScriptURL()
{
AssertIsOnMainThread();
nsAutoCString scheme;
nsresult rv = mBaseURI->GetScheme(scheme);
NS_ENSURE_SUCCESS(rv, false);
// A system principal must either be a blob URL or a resource JSM.
if (mPrincipal->GetIsSystemPrincipal()) {
if (scheme == NS_LITERAL_CSTRING("blob")) {
return true;
}
bool isResource = false;
nsresult rv = NS_URIChainHasFlags(mBaseURI,
nsIProtocolHandler::URI_IS_UI_RESOURCE,
&isResource);
NS_ENSURE_SUCCESS(rv, false);
return isResource;
}
// A null principal can occur for a data URL worker script or a blob URL
// worker script from a sandboxed iframe.
if (mPrincipal->GetIsNullPrincipal()) {
return scheme == NS_LITERAL_CSTRING("data") ||
scheme == NS_LITERAL_CSTRING("blob");
}
// The principal for a blob: URL worker script does not have a matching URL.
// This is likely a bug in our referer setting logic, but exempt it for now.
// This is another reason we should fix bug 1340694 so that referer does not
// depend on the principal URI.
if (scheme == NS_LITERAL_CSTRING("blob")) {
return true;
}
nsCOMPtr<nsIURI> principalURI;
rv = mPrincipal->GetURI(getter_AddRefs(principalURI));
NS_ENSURE_SUCCESS(rv, false);
NS_ENSURE_TRUE(principalURI, false);
bool equal = false;
rv = principalURI->Equals(mBaseURI, &equal);
NS_ENSURE_SUCCESS(rv, false);
return equal;
}
#endif // MOZ_DIAGNOSTIC_ASSERT_ENABLED
bool
WorkerLoadInfo::ProxyReleaseMainThreadObjects(WorkerPrivate* aWorkerPrivate)
{
nsCOMPtr<nsILoadGroup> nullLoadGroup;
return ProxyReleaseMainThreadObjects(aWorkerPrivate, nullLoadGroup);
}
bool
WorkerLoadInfo::ProxyReleaseMainThreadObjects(WorkerPrivate* aWorkerPrivate,
nsCOMPtr<nsILoadGroup>& aLoadGroupToCancel)
{
static const uint32_t kDoomedCount = 10;
nsTArray<nsCOMPtr<nsISupports>> doomed(kDoomedCount);
SwapToISupportsArray(mWindow, doomed);
SwapToISupportsArray(mScriptContext, doomed);
SwapToISupportsArray(mBaseURI, doomed);
SwapToISupportsArray(mResolvedScriptURI, doomed);
SwapToISupportsArray(mPrincipal, doomed);
SwapToISupportsArray(mChannel, doomed);
SwapToISupportsArray(mCSP, doomed);
SwapToISupportsArray(mLoadGroup, doomed);
SwapToISupportsArray(mLoadFailedAsyncRunnable, doomed);
SwapToISupportsArray(mInterfaceRequestor, doomed);
// Before adding anything here update kDoomedCount above!
MOZ_ASSERT(doomed.Length() == kDoomedCount);
RefPtr<MainThreadReleaseRunnable> runnable =
new MainThreadReleaseRunnable(doomed, aLoadGroupToCancel);
return NS_SUCCEEDED(aWorkerPrivate->DispatchToMainThread(runnable.forget()));
}
template <class Derived>
class WorkerPrivateParent<Derived>::EventTarget final
: public nsISerialEventTarget
{
// 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);
// Note, Disable() can be called more than once safely.
mWorkerPrivate = nullptr;
mNestedEventTarget.swap(nestedEventTarget);
}
}
nsIEventTarget*
GetWeakNestedEventTarget() const
{
MOZ_ASSERT(mWeakNestedEventTarget);
return mWeakNestedEventTarget;
}
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIEVENTTARGET_FULL
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()
: 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;
}
nsCOMPtr<nsIScriptTimeoutHandler> mHandler;
mozilla::TimeStamp mTargetTime;
mozilla::TimeDuration mInterval;
int32_t mId;
bool mIsInterval;
bool mCanceled;
};
class WorkerJSContextStats final : public JS::RuntimeStats
{
const nsCString mRtPath;
public:
explicit WorkerJSContextStats(const nsACString& aRtPath)
: JS::RuntimeStats(JsWorkerMallocSizeOf), mRtPath(aRtPath)
{ }
~WorkerJSContextStats()
{
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);
}
}
const nsCString& Path() const
{
return mRtPath;
}
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 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(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override;
private:
class FinishCollectRunnable;
class CollectReportsRunnable final : public MainThreadWorkerControlRunnable
{
RefPtr<FinishCollectRunnable> mFinishCollectRunnable;
const bool mAnonymize;
public:
CollectReportsRunnable(
WorkerPrivate* aWorkerPrivate,
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandlerData,
bool aAnonymize,
const nsACString& aPath);
private:
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override;
~CollectReportsRunnable()
{
if (NS_IsMainThread()) {
mFinishCollectRunnable->Run();
return;
}
WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(workerPrivate);
MOZ_ALWAYS_SUCCEEDS(
workerPrivate->DispatchToMainThread(mFinishCollectRunnable.forget()));
}
};
class FinishCollectRunnable final : public Runnable
{
nsCOMPtr<nsIHandleReportCallback> mHandleReport;
nsCOMPtr<nsISupports> mHandlerData;
size_t mPerformanceUserEntries;
size_t mPerformanceResourceEntries;
const bool mAnonymize;
bool mSuccess;
public:
WorkerJSContextStats mCxStats;
explicit FinishCollectRunnable(
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandlerData,
bool aAnonymize,
const nsACString& aPath);
NS_IMETHOD Run() override;
void SetPerformanceSizes(size_t userEntries, size_t resourceEntries)
{
mPerformanceUserEntries = userEntries;
mPerformanceResourceEntries = resourceEntries;
}
void SetSuccess(bool success)
{
mSuccess = success;
}
private:
~FinishCollectRunnable()
{
// mHandleReport and mHandlerData are released on the main thread.
AssertIsOnMainThread();
}
FinishCollectRunnable(const FinishCollectRunnable&) = delete;
FinishCollectRunnable& operator=(const FinishCollectRunnable&) = delete;
FinishCollectRunnable& operator=(const FinishCollectRunnable&&) = delete;
};
~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);
};
NS_IMPL_ISUPPORTS(WorkerPrivate::MemoryReporter, nsIMemoryReporter)
NS_IMETHODIMP
WorkerPrivate::MemoryReporter::CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData,
bool aAnonymize)
{
AssertIsOnMainThread();
RefPtr<CollectReportsRunnable> runnable;
{
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
// This will effectively report 0 memory.
nsCOMPtr<nsIMemoryReporterManager> manager =
do_GetService("@mozilla.org/memory-reporter-manager;1");
if (manager) {
manager->EndReport();
}
return NS_OK;
}
nsAutoCString path;
path.AppendLiteral("explicit/workers/workers(");
if (aAnonymize && !mWorkerPrivate->Domain().IsEmpty()) {
path.AppendLiteral("<anonymized-domain>)/worker(<anonymized-url>");
} else {
nsAutoCString 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);
runnable =
new CollectReportsRunnable(mWorkerPrivate, aHandleReport, aData, aAnonymize, path);
}
if (!runnable->Dispatch()) {
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
}
void
WorkerPrivate::MemoryReporter::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.InsertLiteral("add-ons/", 0);
addonId += "/";
path.Insert(addonId, explicitLength);
}
WorkerPrivate::MemoryReporter::CollectReportsRunnable::CollectReportsRunnable(
WorkerPrivate* aWorkerPrivate,
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandlerData,
bool aAnonymize,
const nsACString& aPath)
: MainThreadWorkerControlRunnable(aWorkerPrivate),
mFinishCollectRunnable(
new FinishCollectRunnable(aHandleReport, aHandlerData, aAnonymize, aPath)),
mAnonymize(aAnonymize)
{ }
bool
WorkerPrivate::MemoryReporter::CollectReportsRunnable::WorkerRun(JSContext* aCx,
WorkerPrivate* aWorkerPrivate)
{
aWorkerPrivate->AssertIsOnWorkerThread();
RefPtr<WorkerGlobalScope> scope = aWorkerPrivate->GlobalScope();
RefPtr<Performance> performance = scope ? scope->GetPerformanceIfExists()
: nullptr;
if (performance) {
size_t userEntries = performance->SizeOfUserEntries(JsWorkerMallocSizeOf);
size_t resourceEntries =
performance->SizeOfResourceEntries(JsWorkerMallocSizeOf);
mFinishCollectRunnable->SetPerformanceSizes(userEntries, resourceEntries);
}
mFinishCollectRunnable->SetSuccess(
aWorkerPrivate->CollectRuntimeStats(&mFinishCollectRunnable->mCxStats, mAnonymize));
return true;
}
WorkerPrivate::MemoryReporter::FinishCollectRunnable::FinishCollectRunnable(
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandlerData,
bool aAnonymize,
const nsACString& aPath)
: mozilla::Runnable(
"dom::workers::WorkerPrivate::MemoryReporter::FinishCollectRunnable")
, mHandleReport(aHandleReport)
, mHandlerData(aHandlerData)
, mPerformanceUserEntries(0)
, mPerformanceResourceEntries(0)
, mAnonymize(aAnonymize)
, mSuccess(false)
, mCxStats(aPath)
{ }
NS_IMETHODIMP
WorkerPrivate::MemoryReporter::FinishCollectRunnable::Run()
{
AssertIsOnMainThread();
nsCOMPtr<nsIMemoryReporterManager> manager =
do_GetService("@mozilla.org/memory-reporter-manager;1");
if (!manager)
return NS_OK;
if (mSuccess) {
xpc::ReportJSRuntimeExplicitTreeStats(mCxStats, mCxStats.Path(),
mHandleReport, mHandlerData,
mAnonymize);
if (mPerformanceUserEntries) {
nsCString path = mCxStats.Path();
path.AppendLiteral("dom/performance/user-entries");
mHandleReport->Callback(EmptyCString(), path,
nsIMemoryReporter::KIND_HEAP,
nsIMemoryReporter::UNITS_BYTES,
mPerformanceUserEntries,
NS_LITERAL_CSTRING("Memory used for performance user entries."),
mHandlerData);
}
if (mPerformanceResourceEntries) {
nsCString path = mCxStats.Path();
path.AppendLiteral("dom/performance/resource-entries");
mHandleReport->Callback(EmptyCString(), path,
nsIMemoryReporter::KIND_HEAP,
nsIMemoryReporter::UNITS_BYTES,
mPerformanceResourceEntries,
NS_LITERAL_CSTRING("Memory used for performance resource entries."),
mHandlerData);
}
}
manager->EndReport();
return NS_OK;
}
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;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::SetCSP(nsIContentSecurityPolicy* aCSP)
{
AssertIsOnMainThread();
if (!aCSP) {
return;
}
WorkerPrivate* self = ParentAsWorkerPrivate();
aCSP->EnsureEventTarget(self->mMainThreadEventTarget);
mLoadInfo.mCSP = aCSP;
}
template <class Derived>
nsresult
WorkerPrivateParent<Derived>::SetCSPFromHeaderValues(const nsACString& aCSPHeaderValue,
const nsACString& aCSPReportOnlyHeaderValue)
{
AssertIsOnMainThread();
MOZ_DIAGNOSTIC_ASSERT(!mLoadInfo.mCSP);
NS_ConvertASCIItoUTF16 cspHeaderValue(aCSPHeaderValue);
NS_ConvertASCIItoUTF16 cspROHeaderValue(aCSPReportOnlyHeaderValue);
nsCOMPtr<nsIContentSecurityPolicy> csp;
nsresult rv = mLoadInfo.mPrincipal->EnsureCSP(nullptr, getter_AddRefs(csp));
if (!csp) {
return NS_OK;
}
WorkerPrivate* self = ParentAsWorkerPrivate();
csp->EnsureEventTarget(self->mMainThreadEventTarget);
// If there's a CSP header, apply it.
if (!cspHeaderValue.IsEmpty()) {
rv = CSP_AppendCSPFromHeader(csp, cspHeaderValue, false);
NS_ENSURE_SUCCESS(rv, rv);
}
// If there's a report-only CSP header, apply it.
if (!cspROHeaderValue.IsEmpty()) {
rv = CSP_AppendCSPFromHeader(csp, cspROHeaderValue, true);
NS_ENSURE_SUCCESS(rv, rv);
}
// Set evalAllowed, default value is set in GetAllowsEval
bool evalAllowed = false;
bool reportEvalViolations = false;
rv = csp->GetAllowsEval(&reportEvalViolations, &evalAllowed);
NS_ENSURE_SUCCESS(rv, rv);
// Set ReferrerPolicy, default value is set in GetReferrerPolicy
bool hasReferrerPolicy = false;
uint32_t rp = mozilla::net::RP_Unset;
rv = csp->GetReferrerPolicy(&rp, &hasReferrerPolicy);
NS_ENSURE_SUCCESS(rv, rv);
mLoadInfo.mCSP = csp;
mLoadInfo.mEvalAllowed = evalAllowed;
mLoadInfo.mReportCSPViolations = reportEvalViolations;
if (hasReferrerPolicy) {
mLoadInfo.mReferrerPolicy = static_cast<net::ReferrerPolicy>(rp);
}
return NS_OK;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::SetReferrerPolicyFromHeaderValue(
const nsACString& aReferrerPolicyHeaderValue)
{
NS_ConvertUTF8toUTF16 headerValue(aReferrerPolicyHeaderValue);
if (headerValue.IsEmpty()) {
return;
}
net::ReferrerPolicy policy =
nsContentUtils::GetReferrerPolicyFromHeader(headerValue);
if (policy == net::RP_Unset) {
return;
}
SetReferrerPolicy(policy);
}
// 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(
WorkerPrivate* aParent,
const nsAString& aScriptURL,
bool aIsChromeWorker,
WorkerType aWorkerType,
const nsAString& aWorkerName,
const nsACString& aServiceWorkerScope,
WorkerLoadInfo& aLoadInfo)
: mMutex("WorkerPrivateParent Mutex"),
mCondVar(mMutex, "WorkerPrivateParent CondVar"),
mParent(aParent), mScriptURL(aScriptURL),
mWorkerName(aWorkerName), mServiceWorkerScope(aServiceWorkerScope),
mLoadingWorkerScript(false), mBusyCount(0), mParentWindowPausedDepth(0),
mParentStatus(Pending), mParentFrozen(false),
mIsChromeWorker(aIsChromeWorker), mMainThreadObjectsForgotten(false),
mIsSecureContext(false), mWorkerType(aWorkerType),
mCreationTimeStamp(TimeStamp::Now()),
mCreationTimeHighRes((double)PR_Now() / PR_USEC_PER_MSEC)
{
MOZ_ASSERT_IF(!IsDedicatedWorker(), NS_IsMainThread());
if (aLoadInfo.mWindow) {
AssertIsOnMainThread();
MOZ_ASSERT(aLoadInfo.mWindow->IsInnerWindow(),
"Should have inner window here!");
BindToOwner(aLoadInfo.mWindow);
}
mLoadInfo.StealFrom(aLoadInfo);
if (aParent) {
aParent->AssertIsOnWorkerThread();
// Note that this copies our parent's secure context state into mJSSettings.
aParent->CopyJSSettings(mJSSettings);
// And manually set our mIsSecureContext, though it's not really relevant to
// dedicated workers...
mIsSecureContext = aParent->IsSecureContext();
MOZ_ASSERT_IF(mIsChromeWorker, mIsSecureContext);
MOZ_ASSERT(IsDedicatedWorker());
if (aParent->mParentFrozen) {
Freeze(nullptr);
}
}
else {
AssertIsOnMainThread();
RuntimeService::GetDefaultJSSettings(mJSSettings);
// Our secure context state depends on the kind of worker we have.
if (UsesSystemPrincipal() || IsServiceWorker()) {
mIsSecureContext = true;
} else if (mLoadInfo.mWindow) {
// Shared and dedicated workers both inherit the loading window's secure
// context state. Shared workers then prevent windows with a different
// secure context state from attaching to them.
mIsSecureContext = mLoadInfo.mWindow->IsSecureContext();
} else {
MOZ_ASSERT_UNREACHABLE("non-chrome worker that is not a service worker "
"that has no parent and no associated window");
}
if (mIsSecureContext) {
mJSSettings.chrome.compartmentOptions
.creationOptions().setSecureContext(true);
mJSSettings.content.compartmentOptions
.creationOptions().setSecureContext(true);
}
// Our parent can get suspended after it initiates the async creation
// of a new worker thread. In this case suspend the new worker as well.
if (mLoadInfo.mWindow && mLoadInfo.mWindow->IsSuspended()) {
ParentWindowPaused();
}
if (mLoadInfo.mWindow && mLoadInfo.mWindow->IsFrozen()) {
Freeze(mLoadInfo.mWindow);
}
}
}
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) {
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);
JS_RequestInterruptCallback(cx);
}
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(), runnable);
return workerRunnable.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(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();
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Freeze(nsPIDOMWindowInner* aWindow)
{
AssertIsOnParentThread();
// 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 = true;
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];
kungFuDeathGrip->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()) {
return false;
}
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Thaw(nsPIDOMWindowInner* aWindow)
{
AssertIsOnParentThread();
MOZ_ASSERT(mParentFrozen);
// 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];
kungFuDeathGrip->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 (!IsParentWindowPaused() && !mQueuedRunnables.IsEmpty()) {
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()) {
return false;
}
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::ParentWindowPaused()
{
AssertIsOnMainThread();
MOZ_ASSERT_IF(IsDedicatedWorker(), mParentWindowPausedDepth == 0);
mParentWindowPausedDepth += 1;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::ParentWindowResumed()
{
AssertIsOnMainThread();
MOZ_ASSERT(mParentWindowPausedDepth > 0);
MOZ_ASSERT_IF(IsDedicatedWorker(), mParentWindowPausedDepth == 1);
mParentWindowPausedDepth -= 1;
if (mParentWindowPausedDepth > 0) {
return;
}
{
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()) {
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()
{
mMutex.AssertCurrentThreadOwns();
if (mParentStatus < Closing) {
mParentStatus = Closing;
}
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::ModifyBusyCount(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()) {
return false;
}
}
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::ProxyReleaseMainThreadObjects()
{
AssertIsOnParentThread();
MOZ_ASSERT(!mMainThreadObjectsForgotten);
nsCOMPtr<nsILoadGroup> loadGroupToCancel;
// If we're not overriden, then do nothing here. Let the load group get
// handled in ForgetMainThreadObjects().
if (mLoadInfo.mInterfaceRequestor) {
mLoadInfo.mLoadGroup.swap(loadGroupToCancel);
}
bool result = mLoadInfo.ProxyReleaseMainThreadObjects(ParentAsWorkerPrivate(),
loadGroupToCancel);
mMainThreadObjectsForgotten = true;
return result;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::PostMessageInternal(JSContext* aCx,
JS::Handle<JS::Value> aMessage,
const Sequence<JSObject*>& aTransferable,
ErrorResult& aRv)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
if (mParentStatus > Running) {
return;
}
}
JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
aRv = nsContentUtils::CreateJSValueFromSequenceOfObject(aCx, aTransferable,
&transferable);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
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, JS::CloneDataPolicy(), 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()) {
aRv.Throw(NS_ERROR_FAILURE);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::PostMessage(
JSContext* aCx, JS::Handle<JS::Value> aMessage,
const Sequence<JSObject*>& aTransferable,
ErrorResult& aRv)
{
PostMessageInternal(aCx, aMessage, aTransferable, aRv);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateContextOptions(
const JS::ContextOptions& aContextOptions)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
mJSSettings.contextOptions = aContextOptions;
}
RefPtr<UpdateContextOptionsRunnable> runnable =
new UpdateContextOptionsRunnable(ParentAsWorkerPrivate(), aContextOptions);
if (!runnable->Dispatch()) {
NS_WARNING("Failed to update worker context options!");
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdatePreference(WorkerPreference aPref, bool aValue)
{
AssertIsOnParentThread();
MOZ_ASSERT(aPref >= 0 && aPref < WORKERPREF_COUNT);
RefPtr<UpdatePreferenceRunnable> runnable =
new UpdatePreferenceRunnable(ParentAsWorkerPrivate(), aPref, aValue);
if (!runnable->Dispatch()) {
NS_WARNING("Failed to update worker preferences!");
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateLanguages(const nsTArray<nsString>& aLanguages)
{
AssertIsOnParentThread();
RefPtr<UpdateLanguagesRunnable> runnable =
new UpdateLanguagesRunnable(ParentAsWorkerPrivate(), aLanguages);
if (!runnable->Dispatch()) {
NS_WARNING("Failed to update worker languages!");
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateJSWorkerMemoryParameter(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()) {
NS_WARNING("Failed to update memory parameter!");
}
}
}
#ifdef JS_GC_ZEAL
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateGCZeal(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()) {
NS_WARNING("Failed to update worker gczeal!");
}
}
#endif
template <class Derived>
void
WorkerPrivateParent<Derived>::GarbageCollect(bool aShrinking)
{
AssertIsOnParentThread();
RefPtr<GarbageCollectRunnable> runnable =
new GarbageCollectRunnable(ParentAsWorkerPrivate(), aShrinking,
/* collectChildren = */ true);
if (!runnable->Dispatch()) {
NS_WARNING("Failed to GC worker!");
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::CycleCollect(bool aDummy)
{
AssertIsOnParentThread();
RefPtr<CycleCollectRunnable> runnable =
new CycleCollectRunnable(ParentAsWorkerPrivate(),
/* collectChildren = */ true);
if (!runnable->Dispatch()) {
NS_WARNING("Failed to CC worker!");
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::OfflineStatusChangeEvent(bool aIsOffline)
{
AssertIsOnParentThread();
RefPtr<OfflineStatusChangeRunnable> runnable =
new OfflineStatusChangeRunnable(ParentAsWorkerPrivate(), aIsOffline);
if (!runnable->Dispatch()) {
NS_WARNING("Failed to dispatch offline status change event!");
}
}
void
WorkerPrivate::OfflineStatusChangeEventInternal(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(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);
bool dummy;
globalScope->DispatchEvent(event, &dummy);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::MemoryPressure(bool aDummy)
{
AssertIsOnParentThread();
RefPtr<MemoryPressureRunnable> runnable =
new MemoryPressureRunnable(ParentAsWorkerPrivate());
Unused << NS_WARN_IF(!runnable->Dispatch());
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::RegisterSharedWorker(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()) {
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 && IsFrozen() && !Thaw(nullptr)) {
return false;
}
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::BroadcastErrorToSharedWorkers(
JSContext* aCx,
const WorkerErrorReport* aReport,
bool aIsErrorEvent)
{
AssertIsOnMainThread();
if (aIsErrorEvent && JSREPORT_IS_WARNING(aReport->mFlags)) {
// Don't fire any events anywhere. Just log to console.
// XXXbz should we log to all the consoles of all the relevant windows?
MOZ_ASSERT(aReport);
LogErrorToConsole(*aReport, 0);
return;
}
AutoTArray<RefPtr<SharedWorker>, 10> sharedWorkers;
GetAllSharedWorkers(sharedWorkers);
if (sharedWorkers.IsEmpty()) {
return;
}
AutoTArray<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.
nsPIDOMWindowInner* window = sharedWorker->GetOwner();
RefPtr<Event> event;
if (aIsErrorEvent) {
RootedDictionary<ErrorEventInit> errorInit(aCx);
errorInit.mBubbles = false;
errorInit.mCancelable = true;
errorInit.mMessage = aReport->mMessage;
errorInit.mFilename = aReport->mFilename;
errorInit.mLineno = aReport->mLineNumber;
errorInit.mColno = aReport->mColumnNumber;
event = ErrorEvent::Constructor(sharedWorker, NS_LITERAL_STRING("error"),
errorInit);
} else {
event = Event::Constructor(sharedWorker, NS_LITERAL_STRING("error"),
EventInit());
}
if (!event) {
ThrowAndReport(window, NS_ERROR_UNEXPECTED);
continue;
}
event->SetTrusted(true);
bool defaultActionEnabled;
nsresult rv = sharedWorker->DispatchEvent(event, &defaultActionEnabled);
if (NS_FAILED(rv)) {
ThrowAndReport(window, rv);
continue;
}
if (!aIsErrorEvent) {
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 = aReport->mLineNumber;
init.mFilename = aReport->mFilename;
init.mMessage = aReport->mMessage;
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) {
MOZ_ASSERT(aReport);
LogErrorToConsole(*aReport, 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(
nsPIDOMWindowInner* 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.
if (!mSharedWorkers.IsEmpty()) {
Freeze(nullptr);
} else {
Cancel();
}
}
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();
Cancel();
}
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()) {
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>
nsresult
WorkerPrivateParent<Derived>::SetPrincipalOnMainThread(nsIPrincipal* aPrincipal,
nsILoadGroup* aLoadGroup)
{
return mLoadInfo.SetPrincipalOnMainThread(aPrincipal, aLoadGroup);
}
template <class Derived>
nsresult
WorkerPrivateParent<Derived>::SetPrincipalFromChannel(nsIChannel* aChannel)
{
return mLoadInfo.SetPrincipalFromChannel(aChannel);
}
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
template <class Derived>
bool
WorkerPrivateParent<Derived>::FinalChannelPrincipalIsValid(nsIChannel* aChannel)
{
return mLoadInfo.FinalChannelPrincipalIsValid(aChannel);
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::PrincipalURIMatchesScriptURL()
{
return mLoadInfo.PrincipalURIMatchesScriptURL();
}
#endif
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>
void
WorkerPrivateParent<Derived>::FlushReportsToSharedWorkers(
nsIConsoleReportCollector* aReporter)
{
AssertIsOnMainThread();
AutoTArray<RefPtr<SharedWorker>, 10> sharedWorkers;
AutoTArray<WindowAction, 10> windowActions;
GetAllSharedWorkers(sharedWorkers);
// First find out all the shared workers' window.
for (size_t index = 0; index < sharedWorkers.Length(); index++) {
RefPtr<SharedWorker>& sharedWorker = sharedWorkers[index];
// May be null.
nsPIDOMWindowInner* window = sharedWorker->GetOwner();
// Add the owning window to our list so that we will flush the reports later.
if (window && !windowActions.Contains(window)) {
windowActions.AppendElement(WindowAction(window));
}
}
bool reportErrorToBrowserConsole = true;
// Flush the reports.
for (uint32_t index = 0; index < windowActions.Length(); index++) {
WindowAction& windowAction = windowActions[index];
aReporter->FlushReportsToConsole(
windowAction.mWindow->WindowID(),
nsIConsoleReportCollector::ReportAction::Save);
reportErrorToBrowserConsole = false;
}
// Finally report to browser console if there is no any window or shared
// worker.
if (reportErrorToBrowserConsole) {
aReporter->FlushReportsToConsole(0);
return;
}
aReporter->ClearConsoleReports();
}
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(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();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
DOMEventTargetHelper)
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();
nsPIDOMWindowOuter* outer = mLoadInfo.mWindow->GetOuterWindow();
NS_ASSERTION(outer && outer->GetCurrentInnerWindow() == mLoadInfo.mWindow,
"Inner window no longer correct!");
}
#endif
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
template <class Derived>
bool
WorkerPrivateParent<Derived>::PrincipalIsValid() const
{
return mLoadInfo.PrincipalIsValid();
}
#endif
class PostDebuggerMessageRunnable final : public Runnable
{
WorkerDebugger *mDebugger;
nsString mMessage;
public:
PostDebuggerMessageRunnable(WorkerDebugger* aDebugger,
const nsAString& aMessage)
: mozilla::Runnable("PostDebuggerMessageRunnable")
, mDebugger(aDebugger)
, mMessage(aMessage)
{
}
private:
~PostDebuggerMessageRunnable()
{ }
NS_IMETHOD
Run() override
{
mDebugger->PostMessageToDebuggerOnMainThread(mMessage);
return NS_OK;
}
};
class ReportDebuggerErrorRunnable final : public Runnable
{
WorkerDebugger *mDebugger;
nsString mFilename;
uint32_t mLineno;
nsString mMessage;
public:
ReportDebuggerErrorRunnable(WorkerDebugger* aDebugger,
const nsAString& aFilename,
uint32_t aLineno,
const nsAString& aMessage)
: mozilla::Runnable("ReportDebuggerErrorRunnable")
, 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()) {
for (size_t index = 0; index < mListeners.Length(); ++index) {
NS_ReleaseOnMainThreadSystemGroup(
"WorkerDebugger::mListeners", mListeners[index].forget());
}
}
}
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(mozIDOMWindow** aResult)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
if (mWorkerPrivate->GetParent() || !mWorkerPrivate->IsDedicatedWorker()) {
*aResult = nullptr;
return NS_OK;
}
nsCOMPtr<nsPIDOMWindowInner> 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)
{
AssertIsOnMainThread();
if (!mWorkerPrivate) {
return NS_ERROR_UNEXPECTED;
}
if (!mIsInitialized) {
RefPtr<CompileDebuggerScriptRunnable> runnable =
new CompileDebuggerScriptRunnable(mWorkerPrivate, aURL);
if (!runnable->Dispatch()) {
return NS_ERROR_FAILURE;
}
mIsInitialized = true;
}
return NS_OK;
}
NS_IMETHODIMP
WorkerDebugger::PostMessageMoz(const nsAString& aMessage)
{
AssertIsOnMainThread();
if (!mWorkerPrivate || !mIsInitialized) {
return NS_ERROR_UNEXPECTED;
}
RefPtr<DebuggerMessageEventRunnable> runnable =
new DebuggerMessageEventRunnable(mWorkerPrivate, aMessage);
if (!runnable->Dispatch()) {
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(mWorkerPrivate->DispatchToMainThread(runnable.forget()))) {
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(mWorkerPrivate->DispatchToMainThread(runnable.forget()))) {
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);
}
WorkerErrorReport report;
report.mMessage = aMessage;
report.mFilename = aFilename;
LogErrorToConsole(report, 0);
}
WorkerPrivate::WorkerPrivate(WorkerPrivate* aParent,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsAString& aWorkerName,
const nsACString& aServiceWorkerScope,
WorkerLoadInfo& aLoadInfo)
: WorkerPrivateParent<WorkerPrivate>(aParent, aScriptURL,
aIsChromeWorker, aWorkerType,
aWorkerName, aServiceWorkerScope,
aLoadInfo)
, mDebuggerRegistered(false)
, mDebugger(nullptr)
, mJSContext(nullptr)
, mPRThread(nullptr)
, mNumHoldersPreventingShutdownStart(0)
, mDebuggerEventLoopLevel(0)
, mMainThreadEventTarget(GetMainThreadEventTarget())
, mWorkerControlEventTarget(new WorkerEventTarget(this,
WorkerEventTarget::Behavior::ControlOnly))
, mWorkerHybridEventTarget(new WorkerEventTarget(this,
WorkerEventTarget::Behavior::Hybrid))
, mErrorHandlerRecursionCount(0)
, mNextTimeoutId(1)
, mStatus(Pending)
, mFrozen(false)
, mTimerRunning(false)
, mRunningExpiredTimeouts(false)
, mPendingEventQueueClearing(false)
, mCancelAllPendingRunnables(false)
, mPeriodicGCTimerRunning(false)
, mIdleGCTimerRunning(false)
, mWorkerScriptExecutedSuccessfully(false)
, mFetchHandlerWasAdded(false)
, mOnLine(false)
{
if (aParent) {
aParent->AssertIsOnWorkerThread();
aParent->GetAllPreferences(mPreferences);
mOnLine = aParent->OnLine();
}
else {
AssertIsOnMainThread();
RuntimeService::GetDefaultPreferences(mPreferences);
mOnLine = !NS_IsOffline();
}
nsCOMPtr<nsISerialEventTarget> target;
// A child worker just inherits the parent workers ThrottledEventQueue
// and main thread target for now. This is mainly due to the restriction
// that ThrottledEventQueue can only be created on the main thread at the
// moment.
if (aParent) {
mMainThreadThrottledEventQueue = aParent->mMainThreadThrottledEventQueue;
mMainThreadEventTarget = aParent->mMainThreadEventTarget;
return;
}
MOZ_ASSERT(NS_IsMainThread());
target = GetWindow() ? GetWindow()->EventTargetFor(TaskCategory::Worker) : nullptr;
if (!target) {
target = GetMainThreadSerialEventTarget();
MOZ_DIAGNOSTIC_ASSERT(target);
}
// Throttle events to the main thread using a ThrottledEventQueue specific to
// this worker thread. This may return nullptr during shutdown.
mMainThreadThrottledEventQueue = ThrottledEventQueue::Create(target);
// If we were able to creat the throttled event queue, then use it for
// dispatching our main thread runnables. Otherwise use our underlying
// base target.
if (mMainThreadThrottledEventQueue) {
mMainThreadEventTarget = mMainThreadThrottledEventQueue;
} else {
mMainThreadEventTarget = target.forget();
}
}
WorkerPrivate::~WorkerPrivate()
{
mWorkerControlEventTarget->ForgetWorkerPrivate(this);
// We force the hybrid event target to forget the thread when we
// enter the Killing state, but we do it again here to be safe.
// Its possible that we may be created and destroyed without progressing
// to Killing via some obscure code path.
mWorkerHybridEventTarget->ForgetWorkerPrivate(this);
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
const WorkerOptions& aOptions,
ErrorResult& aRv)
{
return WorkerPrivate::Constructor(aGlobal, aScriptURL, false,
WorkerTypeDedicated,
aOptions.mName, nullptr, aRv);
}
// static
bool
WorkerPrivate::WorkerAvailable(JSContext* aCx, 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::IsSystemCaller(aCx)) {
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, EmptyString(),
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::IsSystemCaller(aCx);
}
return GetWorkerPrivateFromContext(aCx)->IsChromeWorker();
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsAString& aWorkerName,
WorkerLoadInfo* aLoadInfo, ErrorResult& aRv)
{
JSContext* cx = aGlobal.Context();
return Constructor(cx, aScriptURL, aIsChromeWorker, aWorkerType,
aWorkerName, VoidCString(), aLoadInfo, aRv);
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(JSContext* aCx,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsAString& aWorkerName,
const nsACString& aServiceWorkerScope,
WorkerLoadInfo* aLoadInfo, ErrorResult& aRv)
{
// If this is a sub-worker, we need to keep the parent worker alive until this
// one is registered.
UniquePtr<SimpleWorkerHolder> holder;
WorkerPrivate* parent = NS_IsMainThread() ?
nullptr :
GetCurrentThreadWorkerPrivate();
if (parent) {
parent->AssertIsOnWorkerThread();
holder.reset(new SimpleWorkerHolder());
if (!holder->HoldWorker(parent, Canceling)) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
} else {
AssertIsOnMainThread();
}
Maybe<WorkerLoadInfo> stackLoadInfo;
if (!aLoadInfo) {
stackLoadInfo.emplace();
nsresult rv = GetLoadInfo(aCx, nullptr, parent, aScriptURL,
aIsChromeWorker, InheritLoadGroup,
aWorkerType, stackLoadInfo.ptr());
aRv.MightThrowJSException();
if (NS_FAILED(rv)) {
scriptloader::ReportLoadError(aRv, rv, aScriptURL);
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) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
}
else {
runtimeService = RuntimeService::GetService();
}
MOZ_ASSERT(runtimeService);
RefPtr<WorkerPrivate> worker =
new WorkerPrivate(parent, aScriptURL, aIsChromeWorker,
aWorkerType, aWorkerName, aServiceWorkerScope,
*aLoadInfo);
// Gecko contexts always have an explicitly-set default locale (set by
// XPJSRuntime::Initialize for the main thread, set by
// WorkerThreadPrimaryRunnable::Run for workers just before running worker
// code), so this is never SpiderMonkey's builtin default locale.
JS::UniqueChars defaultLocale = JS_GetDefaultLocale(aCx);
if (NS_WARN_IF(!defaultLocale)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
worker->mDefaultLocale = Move(defaultLocale);
if (!runtimeService->RegisterWorker(worker)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
worker->EnableDebugger();
MOZ_DIAGNOSTIC_ASSERT(worker->PrincipalIsValid());
RefPtr<CompileScriptRunnable> compiler =
new CompileScriptRunnable(worker, aScriptURL);
if (!compiler->Dispatch()) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
worker->mSelfRef = worker;
return worker.forget();
}
// static
nsresult
WorkerPrivate::GetLoadInfo(JSContext* aCx, nsPIDOMWindowInner* aWindow,
WorkerPrivate* aParent, const nsAString& aScriptURL,
bool aIsChromeWorker,
LoadGroupBehavior aLoadGroupBehavior,
WorkerType aWorkerType,
WorkerLoadInfo* aLoadInfo)
{
using namespace mozilla::dom::workers::scriptloader;
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) {
return NS_ERROR_FAILURE;
}
// Passing a pointer to our stack loadInfo is safe here because this
// method uses a sync runnable to get the channel from the main thread.
rv = ChannelFromScriptURLWorkerThread(aCx, aParent, aScriptURL,
loadInfo);
if (NS_FAILED(rv)) {
MOZ_ALWAYS_TRUE(loadInfo.ProxyReleaseMainThreadObjects(aParent));
return 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) {
MOZ_ALWAYS_TRUE(loadInfo.ProxyReleaseMainThreadObjects(aParent));
return NS_ERROR_FAILURE;
}
loadInfo.mDomain = aParent->Domain();
loadInfo.mFromWindow = aParent->IsFromWindow();
loadInfo.mWindowID = aParent->WindowID();
loadInfo.mStorageAllowed = aParent->IsStorageAllowed();
loadInfo.mOriginAttributes = aParent->GetOriginAttributes();
loadInfo.mServiceWorkersTestingInWindow =
aParent->ServiceWorkersTestingInWindow();
} else {
AssertIsOnMainThread();
// Make sure that the IndexedDatabaseManager is set up
Unused << NS_WARN_IF(!IndexedDatabaseManager::GetOrCreate());
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
MOZ_ASSERT(ssm);
bool isChrome = nsContentUtils::IsSystemCaller(aCx);
// 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<nsPIDOMWindowInner> 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.
if (nsPIDOMWindowOuter* outerWindow = globalWindow->GetOuterWindow()) {
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();
NS_ENSURE_TRUE(loadInfo.mLoadGroup, NS_ERROR_FAILURE);
// 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);
}
}
NS_ENSURE_TRUE(NS_LoadGroupMatchesPrincipal(loadInfo.mLoadGroup,
loadInfo.mPrincipal),
NS_ERROR_FAILURE);
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;
loadInfo.mFromWindow = true;
loadInfo.mWindowID = globalWindow->WindowID();
nsContentUtils::StorageAccess access =
nsContentUtils::StorageAllowedForWindow(globalWindow);
loadInfo.mStorageAllowed = access > nsContentUtils::StorageAccess::eDeny;
loadInfo.mOriginAttributes = nsContentUtils::GetOriginAttributes(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.mOriginAttributes = OriginAttributes();
}
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));
// Top level workers' main script use the document charset for the script
// uri encoding.
bool useDefaultEncoding = false;
rv = ChannelFromScriptURLMainThread(loadInfo.mPrincipal, loadInfo.mBaseURI,
document, loadInfo.mLoadGroup,
aScriptURL,
ContentPolicyType(aWorkerType),
useDefaultEncoding,
getter_AddRefs(loadInfo.mChannel));
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_GetFinalChannelURI(loadInfo.mChannel,
getter_AddRefs(loadInfo.mResolvedScriptURI));
NS_ENSURE_SUCCESS(rv, rv);
rv = loadInfo.SetPrincipalFromChannel(loadInfo.mChannel);
NS_ENSURE_SUCCESS(rv, rv);
}
MOZ_DIAGNOSTIC_ASSERT(loadInfo.PrincipalIsValid());
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_SUCCEEDS(rv);
aLoadInfo.mLoadGroup = loadGroup.forget();
MOZ_ASSERT(NS_LoadGroupMatchesPrincipal(aLoadInfo.mLoadGroup,
aLoadInfo.mPrincipal));
}
void
WorkerPrivate::DoRunLoop(JSContext* aCx)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mThread);
{
MutexAutoLock lock(mMutex);
mJSContext = aCx;
MOZ_ASSERT(mStatus == Pending);
mStatus = Running;
}
// Now that we've done that, we can go ahead and set up our AutoJSAPI. We
// can't before this point, because it can't find the right JSContext before
// then, since it gets it from our mJSContext.
AutoJSAPI jsapi;
jsapi.Init();
MOZ_ASSERT(jsapi.cx() == aCx);
EnableMemoryReporter();
InitializeGCTimers();
Maybe<JSAutoCompartment> workerCompartment;
for (;;) {
Status currentStatus, previousStatus;
bool debuggerRunnablesPending = false;
bool normalRunnablesPending = false;
{
MutexAutoLock lock(mMutex);
previousStatus = mStatus;
while (mControlQueue.IsEmpty() &&
!(debuggerRunnablesPending = !mDebuggerQueue.IsEmpty()) &&
!(normalRunnablesPending = NS_HasPendingEvents(mThread))) {
WaitForWorkerEvents();
}
auto result = ProcessAllControlRunnablesLocked();
if (result != ProcessAllControlRunnablesResult::Nothing) {
// NB: There's no JS on the stack here, so Abort vs MayContinue is
// irrelevant
// The state of the world may have changed, recheck it.
normalRunnablesPending = NS_HasPendingEvents(mThread);
// The debugger queue doesn't get cleared, so we can ignore that.
}
currentStatus = mStatus;
}
// if all holders are done then we can kill this thread.
if (currentStatus != Running && !HasActiveHolders()) {
// If we just changed status, we must schedule the current runnables.
if (previousStatus != Running && currentStatus != Killing) {
NotifyInternal(aCx, Killing);
MOZ_ASSERT(!JS_IsExceptionPending(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 = nullptr;
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 = nullptr;
{
MutexAutoLock lock(mMutex);
mDebuggerQueue.Pop(runnable);
debuggerRunnablesPending = !mDebuggerQueue.IsEmpty();
}
MOZ_ASSERT(runnable);
static_cast<nsIRunnable*>(runnable)->Run();
runnable->Release();
// Flush the promise queue.
Promise::PerformWorkerDebuggerMicroTaskCheckpoint();
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) {
// Process a single runnable from the main queue.
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);
}
// If the worker thread is spamming the main thread faster than it can
// process the work, then pause the worker thread until the MT catches
// up.
if (mMainThreadThrottledEventQueue &&
mMainThreadThrottledEventQueue->Length() > 5000) {
mMainThreadThrottledEventQueue->AwaitIdle();
}
}
MOZ_CRASH("Shouldn't get here!");
}
void
WorkerPrivate::OnProcessNextEvent()
{
AssertIsOnWorkerThread();
uint32_t recursionDepth = CycleCollectedJSContext::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) {
Unused << ProcessAllControlRunnables();
// There's no running JS, and no state to revalidate, so we can ignore the
// return value.
}
}
void
WorkerPrivate::AfterProcessNextEvent()
{
AssertIsOnWorkerThread();
MOZ_ASSERT(CycleCollectedJSContext::Get()->RecursionDepth());
}
void
WorkerPrivate::MaybeDispatchLoadFailedRunnable()
{
AssertIsOnWorkerThread();
nsCOMPtr<nsIRunnable> runnable = StealLoadFailedAsyncRunnable();
if (!runnable) {
return;
}
MOZ_ALWAYS_SUCCEEDS(DispatchToMainThread(runnable.forget()));
}
nsIEventTarget*
WorkerPrivate::MainThreadEventTarget()
{
return mMainThreadEventTarget;
}
nsresult
WorkerPrivate::DispatchToMainThread(nsIRunnable* aRunnable, uint32_t aFlags)
{
nsCOMPtr<nsIRunnable> r = aRunnable;
return DispatchToMainThread(r.forget(), aFlags);
}
nsresult
WorkerPrivate::DispatchToMainThread(already_AddRefed<nsIRunnable> aRunnable,
uint32_t aFlags)
{
return mMainThreadEventTarget->Dispatch(Move(aRunnable), aFlags);
}
nsISerialEventTarget*
WorkerPrivate::ControlEventTarget()
{
return mWorkerControlEventTarget;
}
nsISerialEventTarget*
WorkerPrivate::HybridEventTarget()
{
return mWorkerHybridEventTarget;
}
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);
mPeriodicGCTimerRunning = false;
mIdleGCTimerRunning = false;
}
void
WorkerPrivate::SetGCTimerMode(GCTimerMode aMode)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mGCTimer);
if ((aMode == PeriodicTimer && mPeriodicGCTimerRunning) ||
(aMode == IdleTimer && mIdleGCTimerRunning)) {
return;
}
MOZ_ALWAYS_SUCCEEDS(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);
uint32_t delay = 0;
int16_t type = nsITimer::TYPE_ONE_SHOT;
nsTimerCallbackFunc callback = nullptr;
const char* name = nullptr;
if (aMode == PeriodicTimer) {
delay = PERIODIC_GC_TIMER_DELAY_SEC * 1000;
type = nsITimer::TYPE_REPEATING_SLACK;
callback = PeriodicGCTimerCallback;
name = "dom::workers::PeriodicGCTimerCallback";
}
else {
delay = IDLE_GC_TIMER_DELAY_SEC * 1000;
type = nsITimer::TYPE_ONE_SHOT;
callback = IdleGCTimerCallback;
name = "dom::workers::IdleGCTimerCallback";
}
MOZ_ALWAYS_SUCCEEDS(mGCTimer->SetTarget(mWorkerControlEventTarget));
MOZ_ALWAYS_SUCCEEDS(
mGCTimer->InitWithNamedFuncCallback(callback, this, delay, type, name));
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_SUCCEEDS(mGCTimer->Cancel());
LOG(WorkerLog(), ("Worker %p killed the GC timer\n", this));
mGCTimer = nullptr;
mPeriodicGCTimerRunning = false;
mIdleGCTimerRunning = false;
}
bool
WorkerPrivate::InterruptCallback(JSContext* aCx)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!JS_IsExceptionPending(aCx));
bool mayContinue = true;
bool scheduledIdleGC = false;
for (;;) {
// Run all control events now.
auto result = ProcessAllControlRunnables();
if (result == ProcessAllControlRunnablesResult::Abort) {
mayContinue = false;
}
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(UINT32_MAX));
}
}
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;
}
bool
WorkerPrivate::IsOnCurrentThread()
{
// May be called on any thread!
MOZ_ASSERT(mPRThread);
return PR_GetCurrentThread() == mPRThread;
}
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()) {
NS_WARNING("Failed to dispatch runnable!");
}
}
else {
RefPtr<TopLevelWorkerFinishedRunnable> runnable =
new TopLevelWorkerFinishedRunnable(this);
if (NS_FAILED(DispatchToMainThread(runnable.forget()))) {
NS_WARNING("Failed to dispatch runnable!");
}
}
}
bool
WorkerPrivate::CollectRuntimeStats(JS::RuntimeStats* aRtStats,
bool aAnonymize)
{
AssertIsOnWorkerThread();
NS_ASSERTION(aRtStats, "Null RuntimeStats!");
NS_ASSERTION(mJSContext, "This must never be null!");
return JS::CollectRuntimeStats(mJSContext, aRtStats, nullptr, aAnonymize);
}
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(RegisterWeakAsyncMemoryReporter(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;
{
// Mutex protectes MemoryReporter::mWorkerPrivate which is cleared by
// MemoryReporter::Disable() below.
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();
}
// 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();
// Wait for a worker event.
mCondVar.Wait(aInterval);
}
WorkerPrivate::ProcessAllControlRunnablesResult
WorkerPrivate::ProcessAllControlRunnablesLocked()
{
AssertIsOnWorkerThread();
mMutex.AssertCurrentThreadOwns();
auto result = ProcessAllControlRunnablesResult::Nothing;
for (;;) {
WorkerControlRunnable* event;
if (!mControlQueue.Pop(event)) {
break;
}
MutexAutoUnlock unlock(mMutex);
MOZ_ASSERT(event);
if (NS_FAILED(static_cast<nsIRunnable*>(event)->Run())) {
result = ProcessAllControlRunnablesResult::Abort;
}
if (result == ProcessAllControlRunnablesResult::Nothing) {
// We ran at least one thing.
result = ProcessAllControlRunnablesResult::MayContinue;
}
event->Release();
}
return result;
}
void
WorkerPrivate::ClearMainEventQueue(WorkerRanOrNot aRanOrNot)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mSyncLoopStack.IsEmpty());
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;
}
void
WorkerPrivate::ClearDebuggerEventQueue()
{
while (!mDebuggerQueue.IsEmpty()) {
WorkerRunnable* runnable = nullptr;
mDebuggerQueue.Pop(runnable);
// It should be ok to simply release the runnable, without running it.
runnable->Release();
}
}
bool
WorkerPrivate::FreezeInternal()
{
AssertIsOnWorkerThread();
NS_ASSERTION(!mFrozen, "Already frozen!");
mFrozen = true;
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->Freeze(nullptr);
}
return true;
}
bool
WorkerPrivate::ThawInternal()
{
AssertIsOnWorkerThread();
NS_ASSERTION(mFrozen, "Not yet frozen!");
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->Thaw(nullptr);
}
mFrozen = false;
return true;
}
void
WorkerPrivate::TraverseTimeouts(nsCycleCollectionTraversalCallback& cb)
{
for (uint32_t i = 0; i < mTimeouts.Length(); ++i) {
TimeoutInfo* tmp = mTimeouts[i];
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mHandler)
}
}
void
WorkerPrivate::UnlinkTimeouts()
{
mTimeouts.Clear();
}
bool
WorkerPrivate::ModifyBusyCountFromWorker(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();
}
bool
WorkerPrivate::AddChildWorker(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(true) :
true;
}
void
WorkerPrivate::RemoveChildWorker(ParentType* aChildWorker)
{
AssertIsOnWorkerThread();
NS_ASSERTION(mChildWorkers.Contains(aChildWorker),
"Didn't know about this one!");
mChildWorkers.RemoveElement(aChildWorker);
if (mChildWorkers.IsEmpty() && !ModifyBusyCountFromWorker(false)) {
NS_WARNING("Failed to modify busy count!");
}
}
bool
WorkerPrivate::AddHolder(WorkerHolder* aHolder, Status aFailStatus)
{
AssertIsOnWorkerThread();
{
MutexAutoLock lock(mMutex);
if (mStatus >= aFailStatus) {
return false;
}
}
MOZ_ASSERT(!mHolders.Contains(aHolder), "Already know about this one!");
if (aHolder->GetBehavior() == WorkerHolder::PreventIdleShutdownStart) {
if (!mNumHoldersPreventingShutdownStart && !ModifyBusyCountFromWorker(true)) {
return false;
}
mNumHoldersPreventingShutdownStart += 1;
}
mHolders.AppendElement(aHolder);
return true;
}
void
WorkerPrivate::RemoveHolder(WorkerHolder* aHolder)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mHolders.Contains(aHolder), "Didn't know about this one!");
mHolders.RemoveElement(aHolder);
if (aHolder->GetBehavior() == WorkerHolder::PreventIdleShutdownStart) {
mNumHoldersPreventingShutdownStart -= 1;
if (!mNumHoldersPreventingShutdownStart && !ModifyBusyCountFromWorker(false)) {
NS_WARNING("Failed to modify busy count!");
}
}
}
void
WorkerPrivate::NotifyHolders(JSContext* aCx, Status aStatus)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!JS_IsExceptionPending(aCx));
NS_ASSERTION(aStatus > Running, "Bad status!");
if (aStatus >= Closing) {
CancelAllTimeouts();
}
nsTObserverArray<WorkerHolder*>::ForwardIterator iter(mHolders);
while (iter.HasMore()) {
WorkerHolder* holder = iter.GetNext();
if (!holder->Notify(aStatus)) {
NS_WARNING("Failed to notify holder!");
}
MOZ_ASSERT(!JS_IsExceptionPending(aCx));
}
AutoTArray<ParentType*, 10> children;
children.AppendElements(mChildWorkers);
for (uint32_t index = 0; index < children.Length(); index++) {
if (!children[index]->Notify(aStatus)) {
NS_WARNING("Failed to notify child worker!");
}
}
}
void
WorkerPrivate::CancelAllTimeouts()
{
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 mRunningExpiredTimeouts, then the fact that they are all canceled now
// means that the currently executing RunExpiredTimeouts will deal with
// them. Otherwise, we need to clean them up ourselves.
if (!mRunningExpiredTimeouts) {
mTimeouts.Clear();
ModifyBusyCountFromWorker(false);
}
// Set mTimerRunning false even if mRunningExpiredTimeouts is true, so that
// if we get reentered under this same RunExpiredTimeouts call we don't
// assert above that !mTimeouts().IsEmpty(), because that's clearly false
// now.
mTimerRunning = false;
}
#ifdef DEBUG
else if (!mRunningExpiredTimeouts) {
NS_ASSERTION(mTimeouts.IsEmpty(), "Huh?!");
}
#endif
mTimer = nullptr;
mTimerRunnable = nullptr;
}
already_AddRefed<nsIEventTarget>
WorkerPrivate::CreateNewSyncLoop(Status aFailStatus)
{
AssertIsOnWorkerThread();
{
MutexAutoLock lock(mMutex);
if (mStatus >= aFailStatus) {
return nullptr;
}
}
auto queue = static_cast<ThreadEventQueue<EventQueue>*>(mThread->EventQueue());
nsCOMPtr<nsISerialEventTarget> realEventTarget = queue->PushEventQueue();
MOZ_ASSERT(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();
}
auto result = ProcessAllControlRunnablesLocked();
if (result != ProcessAllControlRunnablesResult::Nothing) {
// XXXkhuey how should we handle Abort here? See Bug 1003730.
// The state of the world may have changed. Recheck it.
normalRunnablesPending = NS_HasPendingEvents(mThread);
// NB: If we processed a NotifyRunnable, we might have run
// non-control runnables, one of which may have shut down the
// sync loop.
if (loopInfo->mCompleted) {
break;
}
}
// If we *didn't* run any control runnables, this should be unchanged.
MOZ_ASSERT(!loopInfo->mCompleted);
if (normalRunnablesPending) {
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);
}
auto queue = static_cast<ThreadEventQueue<EventQueue>*>(mThread->EventQueue());
queue->PopEventQueue(nestedEventTarget);
if (mSyncLoopStack.IsEmpty() && mPendingEventQueueClearing) {
mPendingEventQueueClearing = false;
ClearMainEventQueue(WorkerRan);
}
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 Sequence<JSObject*>& aTransferable,
ErrorResult& aRv)
{
AssertIsOnWorkerThread();
JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
aRv = nsContentUtils::CreateJSValueFromSequenceOfObject(aCx, aTransferable,
&transferable);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
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, JS::CloneDataPolicy(), 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()) {
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();
// XXXkhuey should we abort JS on the stack here if we got Abort above?
}
if (debuggerRunnablesPending) {
// Start the periodic GC timer if it is not already running.
SetGCTimerMode(PeriodicTimer);
WorkerRunnable* runnable = nullptr;
{
MutexAutoLock lock(mMutex);
mDebuggerQueue.Pop(runnable);
}
MOZ_ASSERT(runnable);
static_cast<nsIRunnable*>(runnable)->Run();
runnable->Release();
// Flush the promise queue.
Promise::PerformWorkerDebuggerMicroTaskCheckpoint();
// 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(dom::Function& aHandler, ErrorResult& aRv)
{
AssertIsOnWorkerThread();
RefPtr<DebuggerImmediateRunnable> runnable =
new DebuggerImmediateRunnable(this, aHandler);
if (!runnable->Dispatch()) {
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) {
return true;
}
// Make sure the hybrid event target stops dispatching runnables
// once we reaching the killing state.
if (aStatus == Killing) {
// To avoid deadlock we always acquire the event target mutex before the
// worker private mutex. (We do it in this order because this is what
// workers best for event dispatching.) To enforce that order here we
// need to unlock the worker private mutex before we lock the event target
// mutex in ForgetWorkerPrivate.
{
MutexAutoUnlock unlock(mMutex);
mWorkerHybridEventTarget->ForgetWorkerPrivate(this);
}
// Check the status code again in case another NotifyInternal came in
// while we were unlocked above.
if (mStatus >= aStatus) {
return true;
}
}
previousStatus = mStatus;
mStatus = aStatus;
// Mark parent status as closing immediately to avoid new events being
// dispatched after we clear the queue below.
if (aStatus == Closing) {
Close();
}
}
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);
// Let all our holders know the new status.
NotifyHolders(aCx, aStatus);
MOZ_ASSERT(!JS_IsExceptionPending(aCx));
// 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.IsEmpty()) {
mPendingEventQueueClearing = true;
} else {
ClearMainEventQueue(WorkerRan);
}
}
// If the worker script never ran, or failed to compile, we don't need to do
// anything else.
if (!GlobalScope()) {
return true;
}
// Don't abort the script.
if (aStatus == Closing) {
return true;
}
MOZ_ASSERT(aStatus == Terminating ||
aStatus == Canceling ||
aStatus == Killing);
// Always abort the script.
return false;
}
void
WorkerErrorBase::AssignErrorBase(JSErrorBase* aReport)
{
mFilename = NS_ConvertUTF8toUTF16(aReport->filename);
mLineNumber = aReport->lineno;
mColumnNumber = aReport->column;
mErrorNumber = aReport->errorNumber;
}
void
WorkerErrorNote::AssignErrorNote(JSErrorNotes::Note* aNote)
{
WorkerErrorBase::AssignErrorBase(aNote);
xpc::ErrorNote::ErrorNoteToMessageString(aNote, mMessage);
}
void
WorkerErrorReport::AssignErrorReport(JSErrorReport* aReport)
{
WorkerErrorBase::AssignErrorBase(aReport);
xpc::ErrorReport::ErrorReportToMessageString(aReport, mMessage);
mLine.Assign(aReport->linebuf(), aReport->linebufLength());
mFlags = aReport->flags;
MOZ_ASSERT(aReport->exnType >= JSEXN_FIRST && aReport->exnType < JSEXN_LIMIT);
mExnType = JSExnType(aReport->exnType);
mMutedError = aReport->isMuted;
if (aReport->notes) {
if (!mNotes.SetLength(aReport->notes->length(), fallible)) {
return;
}
size_t i = 0;
for (auto&& note : *aReport->notes) {
mNotes.ElementAt(i).AssignErrorNote(note.get());
i++;
}
}
}
void
WorkerPrivate::ReportError(JSContext* aCx, JS::ConstUTF8CharsZ aToStringResult,
JSErrorReport* aReport)
{
AssertIsOnWorkerThread();
if (!MayContinueRunning() || mErrorHandlerRecursionCount == 2) {
return;
}
NS_ASSERTION(mErrorHandlerRecursionCount == 0 ||
mErrorHandlerRecursionCount == 1,
"Bad recursion logic!");
JS::Rooted<JS::Value> exn(aCx);
if (!JS_GetPendingException(aCx, &exn)) {
// Probably shouldn't actually happen? But let's go ahead and just use null
// for lack of anything better.
exn.setNull();
}
JS_ClearPendingException(aCx);
WorkerErrorReport report;
if (aReport) {
report.AssignErrorReport(aReport);
}
else {
report.mFlags = nsIScriptError::errorFlag | nsIScriptError::exceptionFlag;
}
if (report.mMessage.IsEmpty() && aToStringResult) {
nsDependentCString toStringResult(aToStringResult.c_str());
if (!AppendUTF8toUTF16(toStringResult, report.mMessage, mozilla::fallible)) {
// Try again, with only a 1 KB string. Do this infallibly this time.
// If the user doesn't have 1 KB to spare we're done anyways.
uint32_t index = std::min(uint32_t(1024), toStringResult.Length());
// Drop the last code point that may be cropped.
index = RewindToPriorUTF8Codepoint(toStringResult.BeginReading(), index);
nsDependentCString truncatedToStringResult(aToStringResult.c_str(),
index);
AppendUTF8toUTF16(truncatedToStringResult, report.mMessage);
}
}
mErrorHandlerRecursionCount++;
// Don't want to run the scope's error handler if this is a recursive error or
// if we ran out of memory.
bool fireAtScope = mErrorHandlerRecursionCount == 1 &&
report.mErrorNumber != JSMSG_OUT_OF_MEMORY &&
JS::CurrentGlobalOrNull(aCx);
ReportErrorRunnable::ReportError(aCx, this, fireAtScope, nullptr, report, 0,
exn);
mErrorHandlerRecursionCount--;
}
// static
void
WorkerPrivate::ReportErrorToConsole(const char* aMessage)
{
WorkerPrivate* wp = nullptr;
if (!NS_IsMainThread()) {
wp = GetCurrentThreadWorkerPrivate();
}
ReportErrorToConsoleRunnable::Report(wp, aMessage);
}
int32_t
WorkerPrivate::SetTimeout(JSContext* aCx,
nsIScriptTimeoutHandler* aHandler,
int32_t aTimeout, bool aIsInterval,
ErrorResult& aRv)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(aHandler);
const int32_t timerId = mNextTimeoutId++;
Status currentStatus;
{
MutexAutoLock lock(mMutex);
currentStatus = mStatus;
}
// 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;
}
newInfo->mHandler = aHandler;
// See if any of the optional arguments were passed.
aTimeout = std::max(0, aTimeout);
newInfo->mInterval = TimeDuration::FromMilliseconds(aTimeout);
newInfo->mTargetTime = TimeStamp::Now() + newInfo->mInterval;
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(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()));
}
AutoTArray<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 check JS_IsExceptionPending if something fails, and if
// JS_IsExceptionPending returns false (i.e. uncatchable exception) then
// break out of the loop.
const char *reason;
if (info->mIsInterval) {
reason = "setInterval handler";
} else {
reason = "setTimeout handler";
}
RefPtr<Function> callback = info->mHandler->GetCallback();
if (!callback) {
// scope for the AutoEntryScript, so it comes off the stack before we do
// Promise::PerformMicroTaskCheckpoint.
AutoEntryScript aes(global, reason, false);
// Evaluate the timeout expression.
const nsAString& script = info->mHandler->GetHandlerText();
const char* filename = nullptr;
uint32_t lineNo = 0, dummyColumn = 0;
info->mHandler->GetLocation(&filename, &lineNo, &dummyColumn);
JS::CompileOptions options(aes.cx());
options.setFileAndLine(filename, lineNo).setNoScriptRval(true);
JS::Rooted<JS::Value> unused(aes.cx());
if (!JS::Evaluate(aes.cx(), options, script.BeginReading(),
script.Length(), &unused) &&
!JS_IsExceptionPending(aCx)) {
retval = false;
break;
}
} else {
ErrorResult rv;
JS::Rooted<JS::Value> ignoredVal(aCx);
callback->Call(GlobalScope(), info->mHandler->GetArgs(), &ignoredVal, rv,
reason);
if (rv.IsUncatchableException()) {
rv.SuppressException();
retval = false;
break;
}
rv.SuppressException();
}
// Since we might be processing more timeouts, go ahead and flush
// the promise queue now before we do that.
Promise::PerformWorkerMicroTaskCheckpoint();
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(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, %zu pending timeouts\n",
this, delay, mTimeouts.Length()));
nsresult rv = mTimer->InitWithCallback(mTimerRunnable, delay, nsITimer::TYPE_ONE_SHOT);
if (NS_FAILED(rv)) {
JS_ReportErrorASCII(aCx, "Failed to start timer!");
return false;
}
return true;
}
void
WorkerPrivate::UpdateContextOptionsInternal(
JSContext* aCx,
const JS::ContextOptions& aContextOptions)
{
AssertIsOnWorkerThread();
JS::ContextOptionsRef(aCx) = aContextOptions;
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateContextOptions(aContextOptions);
}
}
void
WorkerPrivate::UpdateLanguagesInternal(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(aLanguages);
}
}
void
WorkerPrivate::UpdatePreferenceInternal(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(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(aCx, aKey, aValue);
}
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateJSWorkerMemoryParameter(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(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) {
JS::PrepareForFullGC(aCx);
if (aShrinking) {
JS::GCForReason(aCx, GC_SHRINK, JS::gcreason::DOM_WORKER);
if (!aCollectChildren) {
LOG(WorkerLog(), ("Worker %p collected idle garbage\n", this));
}
}
else {
JS::GCForReason(aCx, 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(aShrinking);
}
}
}
void
WorkerPrivate::CycleCollectInternal(bool aCollectChildren)
{
AssertIsOnWorkerThread();
nsCycleCollector_collect(nullptr);
if (aCollectChildren) {
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->CycleCollect(/* dummy = */ false);
}
}
}
void
WorkerPrivate::MemoryPressureInternal()
{
AssertIsOnWorkerThread();
if (mScope) {
RefPtr<Console> console = mScope->GetConsoleIfExists();
if (console) {
console->ClearStorage();
}
RefPtr<Performance> performance = mScope->GetPerformanceIfExists();
if (performance) {
performance->MemoryPressure();
}
}
if (mDebuggerScope) {
RefPtr<Console> console = mDebuggerScope->GetConsoleIfExists();
if (console) {
console->ClearStorage();
}
}
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->MemoryPressure(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_SUCCEEDS(
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);
}
void
WorkerPrivate::EndCTypesCall()
{
AssertIsOnWorkerThread();
// 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(globalScope, aIdentifier, rv);
if (NS_WARN_IF(rv.Failed())) {
rv.SuppressException();
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;
if (!init.mPorts.AppendElement(port.forget(), fallible)) {
return false;
}
RefPtr<MessageEvent> event =
MessageEvent::Constructor(globalObject,
NS_LITERAL_STRING("connect"), init, rv);
event->SetTrusted(true);
nsCOMPtr<nsIDOMEvent> domEvent = do_QueryObject(event);
bool dummy;
globalScope->DispatchEvent(domEvent, &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, ServiceWorkerScope());
} else {
globalScope = new DedicatedWorkerGlobalScope(this, WorkerName());
}
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);
// RegisterDebuggerBindings() can spin a nested event loop so we have to set
// mDebuggerScope before calling it, and we have to make sure to unset
// mDebuggerScope if it fails.
mDebuggerScope = Move(globalScope);
if (!RegisterDebuggerBindings(aCx, global)) {
mDebuggerScope = nullptr;
return nullptr;
}
JS_FireOnNewGlobalObject(aCx, global);
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!");
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(nsISerialEventTarget)
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::DelayedDispatch(already_AddRefed<nsIRunnable>, uint32_t)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
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;
}
*aIsOnCurrentThread = mWorkerPrivate->IsOnCurrentThread();
return NS_OK;
}
template <class Derived>
NS_IMETHODIMP_(bool)
WorkerPrivateParent<Derived>::
EventTarget::IsOnCurrentThreadInfallible()
{
// May be called on any thread!
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
NS_WARNING("A worker's event target was used after the worker has !");
return false;
}
return mWorkerPrivate->IsOnCurrentThread();
}
BEGIN_WORKERS_NAMESPACE
WorkerCrossThreadDispatcher*
GetWorkerCrossThreadDispatcher(JSContext* aCx, const JS::Value& aWorker)
{
if (!aWorker.isObject()) {
return nullptr;
}
JS::Rooted<JSObject*> obj(aCx, &aWorker.toObject());
WorkerPrivate* w = nullptr;
UNWRAP_OBJECT(Worker, &obj, w);
MOZ_ASSERT(w);
return w->GetCrossThreadDispatcher();
}
// Force instantiation.
template class WorkerPrivateParent<WorkerPrivate>;
END_WORKERS_NAMESPACE
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