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gecko-dev/dom/workers/WorkerPrivate.cpp
Ryan VanderMeulen cd3e8a6f73 Backed out 7 changesets (bug 1047483, bug 1079301, bug 1079335) for webplatform test failures. 
Backed out changeset 7d06b68c44d0 (bug 1079335)
Backed out changeset 92030169528e (bug 1079301)
Backed out changeset c09d7f95554a (bug 1047483)
Backed out changeset c199f1057d7e (bug 1047483)
Backed out changeset 18830d07884c (bug 1047483)
Backed out changeset e087289ccfbb (bug 1047483)
Backed out changeset 6238ff5d3ed0 (bug 1047483)

CLOSED TREE

--HG--
rename : content/base/public/File.h => content/base/public/nsDOMFile.h
rename : content/base/src/MultipartFileImpl.cpp => content/base/src/nsDOMBlobBuilder.cpp
rename : content/base/src/MultipartFileImpl.h => content/base/src/nsDOMBlobBuilder.h
rename : content/base/src/File.cpp => content/base/src/nsDOMFile.cpp
2014-10-07 13:16:11 -04:00

6042 lines
168 KiB
C++
Raw Blame History

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WorkerPrivate.h"
#include "amIAddonManager.h"
#include "nsIClassInfo.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIConsoleService.h"
#include "nsIDOMDOMException.h"
#include "nsIDOMEvent.h"
#include "nsIDOMFile.h"
#include "nsIDOMMessageEvent.h"
#include "nsIDocument.h"
#include "nsIDocShell.h"
#include "nsIMemoryReporter.h"
#include "nsIPermissionManager.h"
#include "nsIScriptError.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptSecurityManager.h"
#include "nsPerformance.h"
#include "nsPIDOMWindow.h"
#include "nsITextToSubURI.h"
#include "nsIThreadInternal.h"
#include "nsITimer.h"
#include "nsIURI.h"
#include "nsIURL.h"
#include "nsIXPConnect.h"
#include <algorithm>
#include "jsfriendapi.h"
#include "js/OldDebugAPI.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/dom/BindingUtils.h"
#include "mozilla/dom/ErrorEvent.h"
#include "mozilla/dom/ErrorEventBinding.h"
#include "mozilla/dom/Exceptions.h"
#include "mozilla/dom/FunctionBinding.h"
#include "mozilla/dom/ImageData.h"
#include "mozilla/dom/ImageDataBinding.h"
#include "mozilla/dom/MessageEvent.h"
#include "mozilla/dom/MessageEventBinding.h"
#include "mozilla/dom/MessagePortList.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/StructuredClone.h"
#include "mozilla/dom/WorkerBinding.h"
#include "mozilla/Preferences.h"
#include "nsAlgorithm.h"
#include "nsContentUtils.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 "nsSandboxFlags.h"
#include "xpcpublic.h"
#ifdef ANDROID
#include <android/log.h>
#endif
#ifdef DEBUG
#include "nsThreadManager.h"
#endif
#include "File.h"
#include "MessagePort.h"
#include "Navigator.h"
#include "Principal.h"
#include "RuntimeService.h"
#include "ScriptLoader.h"
#include "ServiceWorkerManager.h"
#include "SharedWorker.h"
#include "WorkerFeature.h"
#include "WorkerRunnable.h"
#include "WorkerScope.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"
#ifdef WORKER_LOGGING
#define LOG(_args) do { printf _args ; fflush(stdout); } while (0)
#else
#define LOG(_args) do { } while (0)
#endif
using namespace mozilla;
using namespace mozilla::dom;
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 MOZ_FINAL : public WorkerRunnable
{
nsCOMPtr<nsICancelableRunnable> mWrappedRunnable;
public:
ExternalRunnableWrapper(WorkerPrivate* aWorkerPrivate,
nsICancelableRunnable* aWrappedRunnable)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mWrappedRunnable(aWrappedRunnable)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aWrappedRunnable);
}
NS_DECL_ISUPPORTS_INHERITED
private:
~ExternalRunnableWrapper()
{ }
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
nsresult rv = mWrappedRunnable->Run();
if (NS_FAILED(rv)) {
if (!JS_IsExceptionPending(aCx)) {
Throw(aCx, rv);
}
return false;
}
return true;
}
NS_IMETHOD
Cancel() MOZ_OVERRIDE
{
nsresult rv = mWrappedRunnable->Cancel();
nsresult rv2 = WorkerRunnable::Cancel();
return NS_FAILED(rv) ? rv : rv2;
}
};
struct WindowAction
{
nsPIDOMWindow* mWindow;
bool mDefaultAction;
MOZ_IMPLICIT WindowAction(nsPIDOMWindow* aWindow)
: mWindow(aWindow), mDefaultAction(true)
{ }
bool
operator==(const WindowAction& aOther) const
{
return mWindow == aOther.mWindow;
}
};
void
LogErrorToConsole(const nsAString& aMessage,
const nsAString& aFilename,
const nsAString& aLine,
uint32_t aLineNumber,
uint32_t aColumnNumber,
uint32_t aFlags,
uint64_t aInnerWindowId)
{
AssertIsOnMainThread();
nsCOMPtr<nsIScriptError> scriptError =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
NS_WARN_IF_FALSE(scriptError, "Failed to create script error!");
if (scriptError) {
if (NS_FAILED(scriptError->InitWithWindowID(aMessage, aFilename, aLine,
aLineNumber, aColumnNumber,
aFlags, "Web Worker",
aInnerWindowId))) {
NS_WARNING("Failed to init script error!");
scriptError = nullptr;
}
}
nsCOMPtr<nsIConsoleService> consoleService =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
NS_WARN_IF_FALSE(consoleService, "Failed to get console service!");
if (consoleService) {
if (scriptError) {
if (NS_SUCCEEDED(consoleService->LogMessage(scriptError))) {
return;
}
NS_WARNING("LogMessage failed!");
} else if (NS_SUCCEEDED(consoleService->LogStringMessage(
aMessage.BeginReading()))) {
return;
}
NS_WARNING("LogStringMessage failed!");
}
NS_ConvertUTF16toUTF8 msg(aMessage);
NS_ConvertUTF16toUTF8 filename(aFilename);
static const char kErrorString[] = "JS error in Web Worker: %s [%s:%u]";
#ifdef ANDROID
__android_log_print(ANDROID_LOG_INFO, "Gecko", kErrorString, msg.get(),
filename.get(), aLineNumber);
#endif
fprintf(stderr, kErrorString, msg.get(), filename.get(), aLineNumber);
fflush(stderr);
}
struct WorkerStructuredCloneCallbacks
{
static JSObject*
Read(JSContext* aCx, JSStructuredCloneReader* aReader, uint32_t aTag,
uint32_t aData, void* aClosure)
{
JS::Rooted<JSObject*> result(aCx);
// See if object is a nsIDOMFile pointer.
if (aTag == DOMWORKER_SCTAG_FILE) {
MOZ_ASSERT(!aData);
DOMFileImpl* fileImpl;
if (JS_ReadBytes(aReader, &fileImpl, sizeof(fileImpl))) {
MOZ_ASSERT(fileImpl);
#ifdef DEBUG
{
// File should not be mutable.
bool isMutable;
NS_ASSERTION(NS_SUCCEEDED(fileImpl->GetMutable(&isMutable)) &&
!isMutable,
"Only immutable file should be passed to worker");
}
#endif
{
// New scope to protect |result| from a moving GC during ~nsRefPtr.
nsRefPtr<DOMFile> file = new DOMFile(fileImpl);
result = file::CreateFile(aCx, file);
}
return result;
}
}
// See if object is a nsIDOMBlob pointer.
else if (aTag == DOMWORKER_SCTAG_BLOB) {
MOZ_ASSERT(!aData);
DOMFileImpl* blobImpl;
if (JS_ReadBytes(aReader, &blobImpl, sizeof(blobImpl))) {
MOZ_ASSERT(blobImpl);
#ifdef DEBUG
{
// Blob should not be mutable.
bool isMutable;
NS_ASSERTION(NS_SUCCEEDED(blobImpl->GetMutable(&isMutable)) &&
!isMutable,
"Only immutable blob should be passed to worker");
}
#endif
{
// New scope to protect |result| from a moving GC during ~nsRefPtr.
nsRefPtr<DOMFile> blob = new DOMFile(blobImpl);
result = file::CreateBlob(aCx, blob);
}
return result;
}
}
// See if the object is an ImageData.
else if (aTag == SCTAG_DOM_IMAGEDATA) {
MOZ_ASSERT(!aData);
return ReadStructuredCloneImageData(aCx, aReader);
}
Error(aCx, 0);
return nullptr;
}
static bool
Write(JSContext* aCx, JSStructuredCloneWriter* aWriter,
JS::Handle<JSObject*> aObj, void* aClosure)
{
NS_ASSERTION(aClosure, "Null pointer!");
// We'll stash any nsISupports pointers that need to be AddRef'd here.
nsTArray<nsCOMPtr<nsISupports> >* clonedObjects =
static_cast<nsTArray<nsCOMPtr<nsISupports> >*>(aClosure);
// See if this is a File object.
{
nsIDOMFile* file = file::GetDOMFileFromJSObject(aObj);
if (file) {
DOMFileImpl* fileImpl = static_cast<DOMFile*>(file)->Impl();
if (JS_WriteUint32Pair(aWriter, DOMWORKER_SCTAG_FILE, 0) &&
JS_WriteBytes(aWriter, &fileImpl, sizeof(fileImpl))) {
clonedObjects->AppendElement(fileImpl);
return true;
}
}
}
// See if this is a Blob object.
{
nsIDOMBlob* blob = file::GetDOMBlobFromJSObject(aObj);
if (blob) {
DOMFileImpl* blobImpl = static_cast<DOMFile*>(blob)->Impl();
if (blobImpl && NS_SUCCEEDED(blobImpl->SetMutable(false)) &&
JS_WriteUint32Pair(aWriter, DOMWORKER_SCTAG_BLOB, 0) &&
JS_WriteBytes(aWriter, &blobImpl, sizeof(blobImpl))) {
clonedObjects->AppendElement(blobImpl);
return true;
}
}
}
// See if this is an ImageData object.
{
ImageData* imageData = nullptr;
if (NS_SUCCEEDED(UNWRAP_OBJECT(ImageData, aObj, imageData))) {
return WriteStructuredCloneImageData(aCx, aWriter, imageData);
}
}
Error(aCx, 0);
return false;
}
static void
Error(JSContext* aCx, uint32_t /* aErrorId */)
{
Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
}
};
JSStructuredCloneCallbacks gWorkerStructuredCloneCallbacks = {
WorkerStructuredCloneCallbacks::Read,
WorkerStructuredCloneCallbacks::Write,
WorkerStructuredCloneCallbacks::Error,
nullptr,
nullptr,
nullptr
};
struct MainThreadWorkerStructuredCloneCallbacks
{
static JSObject*
Read(JSContext* aCx, JSStructuredCloneReader* aReader, uint32_t aTag,
uint32_t aData, void* aClosure)
{
AssertIsOnMainThread();
// See if object is a nsIDOMFile pointer.
if (aTag == DOMWORKER_SCTAG_FILE) {
MOZ_ASSERT(!aData);
DOMFileImpl* fileImpl;
if (JS_ReadBytes(aReader, &fileImpl, sizeof(fileImpl))) {
MOZ_ASSERT(fileImpl);
#ifdef DEBUG
{
// File should not be mutable.
bool isMutable;
NS_ASSERTION(NS_SUCCEEDED(fileImpl->GetMutable(&isMutable)) &&
!isMutable,
"Only immutable file should be passed to worker");
}
#endif
nsCOMPtr<nsIDOMFile> file = new DOMFile(fileImpl);
// nsIDOMFiles should be threadsafe, thus we will use the same instance
// on the main thread.
JS::Rooted<JS::Value> wrappedFile(aCx);
nsresult rv = nsContentUtils::WrapNative(aCx, file,
&NS_GET_IID(nsIDOMFile),
&wrappedFile);
if (NS_FAILED(rv)) {
Error(aCx, nsIDOMDOMException::DATA_CLONE_ERR);
return nullptr;
}
return &wrappedFile.toObject();
}
}
// See if object is a nsIDOMBlob pointer.
else if (aTag == DOMWORKER_SCTAG_BLOB) {
MOZ_ASSERT(!aData);
DOMFileImpl* blobImpl;
if (JS_ReadBytes(aReader, &blobImpl, sizeof(blobImpl))) {
MOZ_ASSERT(blobImpl);
#ifdef DEBUG
{
// Blob should not be mutable.
bool isMutable;
NS_ASSERTION(NS_SUCCEEDED(blobImpl->GetMutable(&isMutable)) &&
!isMutable,
"Only immutable blob should be passed to worker");
}
#endif
nsCOMPtr<nsIDOMBlob> blob = new DOMFile(blobImpl);
// nsIDOMBlobs should be threadsafe, thus we will use the same instance
// on the main thread.
JS::Rooted<JS::Value> wrappedBlob(aCx);
nsresult rv = nsContentUtils::WrapNative(aCx, blob,
&NS_GET_IID(nsIDOMBlob),
&wrappedBlob);
if (NS_FAILED(rv)) {
Error(aCx, nsIDOMDOMException::DATA_CLONE_ERR);
return nullptr;
}
return &wrappedBlob.toObject();
}
}
JS_ClearPendingException(aCx);
return NS_DOMReadStructuredClone(aCx, aReader, aTag, aData, nullptr);
}
static bool
Write(JSContext* aCx, JSStructuredCloneWriter* aWriter,
JS::Handle<JSObject*> aObj, void* aClosure)
{
AssertIsOnMainThread();
NS_ASSERTION(aClosure, "Null pointer!");
// We'll stash any nsISupports pointers that need to be AddRef'd here.
nsTArray<nsCOMPtr<nsISupports> >* clonedObjects =
static_cast<nsTArray<nsCOMPtr<nsISupports> >*>(aClosure);
// See if this is a wrapped native.
nsCOMPtr<nsIXPConnectWrappedNative> wrappedNative;
nsContentUtils::XPConnect()->
GetWrappedNativeOfJSObject(aCx, aObj, getter_AddRefs(wrappedNative));
if (wrappedNative) {
// Get the raw nsISupports out of it.
nsISupports* wrappedObject = wrappedNative->Native();
NS_ASSERTION(wrappedObject, "Null pointer?!");
// See if the wrapped native is a nsIDOMFile.
nsCOMPtr<nsIDOMFile> file = do_QueryInterface(wrappedObject);
if (file) {
nsRefPtr<DOMFileImpl> fileImpl =
static_cast<DOMFile*>(file.get())->Impl();
if (fileImpl->IsCCed()) {
NS_WARNING("Cycle collected file objects are not supported!");
} else {
if (NS_SUCCEEDED(fileImpl->SetMutable(false))) {
DOMFileImpl* fileImplPtr = fileImpl;
if (JS_WriteUint32Pair(aWriter, DOMWORKER_SCTAG_FILE, 0) &&
JS_WriteBytes(aWriter, &fileImplPtr, sizeof(fileImplPtr))) {
clonedObjects->AppendElement(fileImpl);
return true;
}
}
}
}
// See if the wrapped native is a nsIDOMBlob.
nsCOMPtr<nsIDOMBlob> blob = do_QueryInterface(wrappedObject);
if (blob) {
nsRefPtr<DOMFileImpl> blobImpl =
static_cast<DOMFile*>(blob.get())->Impl();
if (blobImpl->IsCCed()) {
NS_WARNING("Cycle collected blob objects are not supported!");
} else {
if (NS_SUCCEEDED(blobImpl->SetMutable(false))) {
DOMFileImpl* blobImplPtr = blobImpl;
if (JS_WriteUint32Pair(aWriter, DOMWORKER_SCTAG_BLOB, 0) &&
JS_WriteBytes(aWriter, &blobImplPtr, sizeof(blobImplPtr))) {
clonedObjects->AppendElement(blobImpl);
return true;
}
}
}
}
}
JS_ClearPendingException(aCx);
return NS_DOMWriteStructuredClone(aCx, aWriter, aObj, nullptr);
}
static void
Error(JSContext* aCx, uint32_t aErrorId)
{
AssertIsOnMainThread();
NS_DOMStructuredCloneError(aCx, aErrorId);
}
};
JSStructuredCloneCallbacks gMainThreadWorkerStructuredCloneCallbacks = {
MainThreadWorkerStructuredCloneCallbacks::Read,
MainThreadWorkerStructuredCloneCallbacks::Write,
MainThreadWorkerStructuredCloneCallbacks::Error,
nullptr,
nullptr,
nullptr
};
struct ChromeWorkerStructuredCloneCallbacks
{
static JSObject*
Read(JSContext* aCx, JSStructuredCloneReader* aReader, uint32_t aTag,
uint32_t aData, void* aClosure)
{
return WorkerStructuredCloneCallbacks::Read(aCx, aReader, aTag, aData,
aClosure);
}
static bool
Write(JSContext* aCx, JSStructuredCloneWriter* aWriter,
JS::Handle<JSObject*> aObj, void* aClosure)
{
return WorkerStructuredCloneCallbacks::Write(aCx, aWriter, aObj, aClosure);
}
static void
Error(JSContext* aCx, uint32_t aErrorId)
{
return WorkerStructuredCloneCallbacks::Error(aCx, aErrorId);
}
};
JSStructuredCloneCallbacks gChromeWorkerStructuredCloneCallbacks = {
ChromeWorkerStructuredCloneCallbacks::Read,
ChromeWorkerStructuredCloneCallbacks::Write,
ChromeWorkerStructuredCloneCallbacks::Error,
nullptr,
nullptr,
nullptr
};
struct MainThreadChromeWorkerStructuredCloneCallbacks
{
static JSObject*
Read(JSContext* aCx, JSStructuredCloneReader* aReader, uint32_t aTag,
uint32_t aData, void* aClosure)
{
AssertIsOnMainThread();
JSObject* clone =
MainThreadWorkerStructuredCloneCallbacks::Read(aCx, aReader, aTag, aData,
aClosure);
if (clone) {
return clone;
}
clone =
ChromeWorkerStructuredCloneCallbacks::Read(aCx, aReader, aTag, aData,
aClosure);
if (clone) {
return clone;
}
JS_ClearPendingException(aCx);
return NS_DOMReadStructuredClone(aCx, aReader, aTag, aData, nullptr);
}
static bool
Write(JSContext* aCx, JSStructuredCloneWriter* aWriter,
JS::Handle<JSObject*> aObj, void* aClosure)
{
AssertIsOnMainThread();
if (MainThreadWorkerStructuredCloneCallbacks::Write(aCx, aWriter, aObj,
aClosure) ||
ChromeWorkerStructuredCloneCallbacks::Write(aCx, aWriter, aObj,
aClosure) ||
NS_DOMWriteStructuredClone(aCx, aWriter, aObj, nullptr)) {
return true;
}
return false;
}
static void
Error(JSContext* aCx, uint32_t aErrorId)
{
AssertIsOnMainThread();
NS_DOMStructuredCloneError(aCx, aErrorId);
}
};
JSStructuredCloneCallbacks gMainThreadChromeWorkerStructuredCloneCallbacks = {
MainThreadChromeWorkerStructuredCloneCallbacks::Read,
MainThreadChromeWorkerStructuredCloneCallbacks::Write,
MainThreadChromeWorkerStructuredCloneCallbacks::Error,
nullptr,
nullptr,
nullptr
};
class MainThreadReleaseRunnable MOZ_FINAL : public nsRunnable
{
nsTArray<nsCOMPtr<nsISupports>> mDoomed;
nsTArray<nsCString> mHostObjectURIs;
public:
MainThreadReleaseRunnable(nsTArray<nsCOMPtr<nsISupports>>& aDoomed,
nsTArray<nsCString>& aHostObjectURIs)
{
mDoomed.SwapElements(aDoomed);
mHostObjectURIs.SwapElements(aHostObjectURIs);
}
NS_DECL_ISUPPORTS_INHERITED
NS_IMETHOD
Run() MOZ_OVERRIDE
{
mDoomed.Clear();
for (uint32_t index = 0; index < mHostObjectURIs.Length(); index++) {
nsHostObjectProtocolHandler::RemoveDataEntry(mHostObjectURIs[index]);
}
return NS_OK;
}
private:
~MainThreadReleaseRunnable()
{ }
};
class WorkerFinishedRunnable MOZ_FINAL : public WorkerControlRunnable
{
WorkerPrivate* mFinishedWorker;
public:
WorkerFinishedRunnable(WorkerPrivate* aWorkerPrivate,
WorkerPrivate* aFinishedWorker)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mFinishedWorker(aFinishedWorker)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
// Silence bad assertions.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
nsTArray<nsCOMPtr<nsISupports>> doomed;
mFinishedWorker->ForgetMainThreadObjects(doomed);
nsTArray<nsCString> hostObjectURIs;
mFinishedWorker->StealHostObjectURIs(hostObjectURIs);
nsRefPtr<MainThreadReleaseRunnable> runnable =
new MainThreadReleaseRunnable(doomed, hostObjectURIs);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
NS_WARNING("Failed to dispatch, going to leak!");
}
RuntimeService* runtime = RuntimeService::GetService();
NS_ASSERTION(runtime, "This should never be null!");
runtime->UnregisterWorker(aCx, mFinishedWorker);
mFinishedWorker->ClearSelfRef();
return true;
}
};
class TopLevelWorkerFinishedRunnable MOZ_FINAL : public nsRunnable
{
WorkerPrivate* mFinishedWorker;
public:
explicit TopLevelWorkerFinishedRunnable(WorkerPrivate* aFinishedWorker)
: mFinishedWorker(aFinishedWorker)
{
aFinishedWorker->AssertIsOnWorkerThread();
}
NS_DECL_ISUPPORTS_INHERITED
private:
~TopLevelWorkerFinishedRunnable() {}
NS_IMETHOD
Run() MOZ_OVERRIDE
{
AssertIsOnMainThread();
RuntimeService* runtime = RuntimeService::GetService();
MOZ_ASSERT(runtime);
AutoSafeJSContext cx;
JSAutoRequest ar(cx);
runtime->UnregisterWorker(cx, mFinishedWorker);
nsTArray<nsCOMPtr<nsISupports> > doomed;
mFinishedWorker->ForgetMainThreadObjects(doomed);
nsTArray<nsCString> hostObjectURIs;
mFinishedWorker->StealHostObjectURIs(hostObjectURIs);
nsRefPtr<MainThreadReleaseRunnable> runnable =
new MainThreadReleaseRunnable(doomed, hostObjectURIs);
if (NS_FAILED(NS_DispatchToCurrentThread(runnable))) {
NS_WARNING("Failed to dispatch, going to leak!");
}
mFinishedWorker->ClearSelfRef();
return NS_OK;
}
};
class ModifyBusyCountRunnable MOZ_FINAL : public WorkerControlRunnable
{
bool mIncrease;
public:
ModifyBusyCountRunnable(WorkerPrivate* aWorkerPrivate, bool aIncrease)
: WorkerControlRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount),
mIncrease(aIncrease)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
return aWorkerPrivate->ModifyBusyCount(aCx, mIncrease);
}
virtual void
PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate, bool aRunResult)
MOZ_OVERRIDE
{
if (mIncrease) {
WorkerControlRunnable::PostRun(aCx, aWorkerPrivate, aRunResult);
return;
}
// Don't do anything here as it's possible that aWorkerPrivate has been
// deleted.
}
};
class CompileScriptRunnable MOZ_FINAL : public WorkerRunnable
{
public:
explicit CompileScriptRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadModifyBusyCount)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
JS::Rooted<JSObject*> global(aCx,
aWorkerPrivate->CreateGlobalScope(aCx));
if (!global) {
NS_WARNING("Failed to make global!");
return false;
}
JSAutoCompartment ac(aCx, global);
bool result = scriptloader::LoadWorkerScript(aCx);
if (result) {
aWorkerPrivate->SetWorkerScriptExecutedSuccessfully();
}
return result;
}
};
class CloseEventRunnable MOZ_FINAL : public WorkerRunnable
{
public:
explicit CloseEventRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
MOZ_CRASH("Don't call Dispatch() on CloseEventRunnable!");
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
MOZ_CRASH("Don't call Dispatch() on CloseEventRunnable!");
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
JS::Rooted<JSObject*> target(aCx, JS::CurrentGlobalOrNull(aCx));
NS_ASSERTION(target, "This must never be null!");
aWorkerPrivate->CloseHandlerStarted();
WorkerGlobalScope* globalScope = aWorkerPrivate->GlobalScope();
nsCOMPtr<nsIDOMEvent> event;
nsresult rv =
NS_NewDOMEvent(getter_AddRefs(event), globalScope, nullptr, nullptr);
if (NS_FAILED(rv)) {
Throw(aCx, rv);
return false;
}
rv = event->InitEvent(NS_LITERAL_STRING("close"), false, false);
if (NS_FAILED(rv)) {
Throw(aCx, rv);
return false;
}
event->SetTrusted(true);
globalScope->DispatchDOMEvent(nullptr, event, nullptr, nullptr);
return true;
}
virtual void
PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate, bool aRunResult)
MOZ_OVERRIDE
{
// Report errors.
WorkerRunnable::PostRun(aCx, aWorkerPrivate, aRunResult);
// Match the busy count increase from NotifyRunnable.
if (!aWorkerPrivate->ModifyBusyCountFromWorker(aCx, false)) {
JS_ReportPendingException(aCx);
}
aWorkerPrivate->CloseHandlerFinished();
}
};
class MessageEventRunnable MOZ_FINAL : public WorkerRunnable
{
JSAutoStructuredCloneBuffer mBuffer;
nsTArray<nsCOMPtr<nsISupports> > mClonedObjects;
uint64_t mMessagePortSerial;
bool mToMessagePort;
public:
MessageEventRunnable(WorkerPrivate* aWorkerPrivate,
TargetAndBusyBehavior aBehavior,
JSAutoStructuredCloneBuffer&& aData,
nsTArray<nsCOMPtr<nsISupports> >& aClonedObjects,
bool aToMessagePort, uint64_t aMessagePortSerial)
: WorkerRunnable(aWorkerPrivate, aBehavior)
, mBuffer(Move(aData))
, mMessagePortSerial(aMessagePortSerial)
, mToMessagePort(aToMessagePort)
{
mClonedObjects.SwapElements(aClonedObjects);
}
bool
DispatchDOMEvent(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
DOMEventTargetHelper* aTarget, bool aIsMainThread)
{
// Release reference to objects that were AddRef'd for
// cloning into worker when array goes out of scope.
nsTArray<nsCOMPtr<nsISupports>> clonedObjects;
clonedObjects.SwapElements(mClonedObjects);
JS::Rooted<JS::Value> messageData(aCx);
if (!mBuffer.read(aCx, &messageData,
workers::WorkerStructuredCloneCallbacks(aIsMainThread))) {
xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
return false;
}
nsRefPtr<MessageEvent> event = new MessageEvent(aTarget, nullptr, nullptr);
nsresult rv =
event->InitMessageEvent(NS_LITERAL_STRING("message"),
false /* non-bubbling */,
true /* cancelable */,
messageData,
EmptyString(),
EmptyString(),
nullptr);
if (NS_FAILED(rv)) {
xpc::Throw(aCx, rv);
return false;
}
event->SetTrusted(true);
nsCOMPtr<nsIDOMEvent> domEvent = do_QueryObject(event);
nsEventStatus dummy = nsEventStatus_eIgnore;
aTarget->DispatchDOMEvent(nullptr, domEvent, nullptr, &dummy);
return true;
}
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
MOZ_ASSERT_IF(mToMessagePort, aWorkerPrivate->IsSharedWorker());
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 (mToMessagePort) {
return
aWorkerPrivate->DispatchMessageEventToMessagePort(aCx,
mMessagePortSerial,
Move(mBuffer),
mClonedObjects);
}
if (aWorkerPrivate->IsSuspended()) {
aWorkerPrivate->QueueRunnable(this);
return true;
}
aWorkerPrivate->AssertInnerWindowIsCorrect();
return DispatchDOMEvent(aCx, aWorkerPrivate, aWorkerPrivate,
!aWorkerPrivate->GetParent());
}
MOZ_ASSERT(aWorkerPrivate == GetWorkerPrivateFromContext(aCx));
if (mToMessagePort) {
nsRefPtr<workers::MessagePort> port =
aWorkerPrivate->GetMessagePort(mMessagePortSerial);
if (!port) {
// Must have been closed already.
return true;
}
return DispatchDOMEvent(aCx, aWorkerPrivate, port, false);
}
return DispatchDOMEvent(aCx, aWorkerPrivate, aWorkerPrivate->GlobalScope(),
false);
}
};
class NotifyRunnable MOZ_FINAL : public WorkerControlRunnable
{
Status mStatus;
public:
NotifyRunnable(WorkerPrivate* aWorkerPrivate, Status aStatus)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mStatus(aStatus)
{
MOZ_ASSERT(aStatus == Closing || aStatus == Terminating ||
aStatus == Canceling || aStatus == Killing);
}
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
// Modify here, but not in PostRun! This busy count addition will be matched
// by the CloseEventRunnable.
return aWorkerPrivate->ModifyBusyCount(aCx, true);
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
if (!aDispatchResult) {
// We couldn't dispatch to the worker, which means it's already dead.
// Undo the busy count modification.
aWorkerPrivate->ModifyBusyCount(aCx, false);
}
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
return aWorkerPrivate->NotifyInternal(aCx, mStatus);
}
};
class CloseRunnable MOZ_FINAL : public WorkerControlRunnable
{
public:
explicit CloseRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
// This busy count will be matched by the CloseEventRunnable.
return aWorkerPrivate->ModifyBusyCount(aCx, true) &&
aWorkerPrivate->Close(aCx);
}
};
class SuspendRunnable MOZ_FINAL : public WorkerControlRunnable
{
public:
explicit SuspendRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
return aWorkerPrivate->SuspendInternal(aCx);
}
};
class ResumeRunnable MOZ_FINAL : public WorkerControlRunnable
{
public:
explicit ResumeRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
return aWorkerPrivate->ResumeInternal(aCx);
}
};
class ReportErrorRunnable MOZ_FINAL : public WorkerRunnable
{
nsString mMessage;
nsString mFilename;
nsString mLine;
uint32_t mLineNumber;
uint32_t mColumnNumber;
uint32_t mFlags;
uint32_t mErrorNumber;
public:
// aWorkerPrivate is the worker thread we're on (or the main thread, if null)
// aTarget is the worker object that we are going to fire an error at
// (if any).
static bool
ReportError(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aFireAtScope, WorkerPrivate* aTarget,
const nsString& aMessage, const nsString& aFilename,
const nsString& aLine, uint32_t aLineNumber,
uint32_t aColumnNumber, uint32_t aFlags,
uint32_t aErrorNumber, uint64_t aInnerWindowId)
{
if (aWorkerPrivate) {
aWorkerPrivate->AssertIsOnWorkerThread();
}
else {
AssertIsOnMainThread();
}
JS::Rooted<JSString*> message(aCx, JS_NewUCStringCopyN(aCx, aMessage.get(),
aMessage.Length()));
if (!message) {
return false;
}
JS::Rooted<JSString*> filename(aCx, JS_NewUCStringCopyN(aCx, aFilename.get(),
aFilename.Length()));
if (!filename) {
return false;
}
// We should not fire error events for warnings but instead make sure that
// they show up in the error console.
if (!JSREPORT_IS_WARNING(aFlags)) {
// First fire an ErrorEvent at the worker.
RootedDictionary<ErrorEventInit> init(aCx);
init.mMessage = aMessage;
init.mFilename = aFilename;
init.mLineno = aLineNumber;
init.mCancelable = true;
init.mBubbles = true;
if (aTarget) {
nsRefPtr<ErrorEvent> event =
ErrorEvent::Constructor(aTarget, NS_LITERAL_STRING("error"), init);
event->SetTrusted(true);
nsEventStatus status = nsEventStatus_eIgnore;
aTarget->DispatchDOMEvent(nullptr, event, nullptr, &status);
if (status == nsEventStatus_eConsumeNoDefault) {
return true;
}
}
// Now fire an event at the global object, but don't do that if the error
// code is too much recursion and this is the same script threw the error.
if (aFireAtScope && (aTarget || aErrorNumber != JSMSG_OVER_RECURSED)) {
JS::Rooted<JSObject*> target(aCx, JS::CurrentGlobalOrNull(aCx));
NS_ASSERTION(target, "This should never be null!");
nsEventStatus status = nsEventStatus_eIgnore;
nsIScriptGlobalObject* sgo;
if (aWorkerPrivate) {
WorkerGlobalScope* globalTarget = aWorkerPrivate->GlobalScope();
MOZ_ASSERT(target == globalTarget->GetWrapperPreserveColor());
nsRefPtr<ErrorEvent> event =
ErrorEvent::Constructor(aTarget, NS_LITERAL_STRING("error"), init);
event->SetTrusted(true);
nsIDOMEventTarget* target = static_cast<nsIDOMEventTarget*>(globalTarget);
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(target))) {
MOZ_ASSERT(NS_IsMainThread());
if (NS_FAILED(sgo->HandleScriptError(init, &status))) {
NS_WARNING("Failed to dispatch main thread error event!");
status = nsEventStatus_eIgnore;
}
}
// Was preventDefault() called?
if (status == nsEventStatus_eConsumeNoDefault) {
return true;
}
}
}
// Now fire a runnable to do the same on the parent's thread if we can.
if (aWorkerPrivate) {
nsRefPtr<ReportErrorRunnable> runnable =
new ReportErrorRunnable(aWorkerPrivate, aMessage, aFilename, aLine,
aLineNumber, aColumnNumber, aFlags,
aErrorNumber);
return runnable->Dispatch(aCx);
}
// Otherwise log an error to the error console.
LogErrorToConsole(aMessage, aFilename, aLine, aLineNumber, aColumnNumber,
aFlags, aInnerWindowId);
return true;
}
private:
ReportErrorRunnable(WorkerPrivate* aWorkerPrivate, const nsString& aMessage,
const nsString& aFilename, const nsString& aLine,
uint32_t aLineNumber, uint32_t aColumnNumber,
uint32_t aFlags, uint32_t aErrorNumber)
: WorkerRunnable(aWorkerPrivate, ParentThreadUnchangedBusyCount),
mMessage(aMessage), mFilename(aFilename), mLine(aLine),
mLineNumber(aLineNumber), mColumnNumber(aColumnNumber), mFlags(aFlags),
mErrorNumber(aErrorNumber)
{ }
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_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) MOZ_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->IsSuspended()) {
aWorkerPrivate->QueueRunnable(this);
return true;
}
if (aWorkerPrivate->IsServiceWorker()) {
nsRefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
MOZ_ASSERT(swm);
swm->HandleError(aCx, aWorkerPrivate->SharedWorkerName(),
aWorkerPrivate->ScriptURL(),
mMessage,
mFilename, mLine, mLineNumber, mColumnNumber, mFlags);
return true;
} else if (aWorkerPrivate->IsSharedWorker()) {
aWorkerPrivate->BroadcastErrorToSharedWorkers(aCx, mMessage, mFilename,
mLine, mLineNumber,
mColumnNumber, mFlags);
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->GetInnerWindowId();
}
}
// Don't fire this event if the JS object has been disconnected from the
// private object.
if (!workerIsAcceptingEvents) {
return true;
}
return ReportError(aCx, parent, fireAtScope, aWorkerPrivate, mMessage,
mFilename, mLine, mLineNumber, mColumnNumber, mFlags,
mErrorNumber, innerWindowId);
}
};
class TimerRunnable MOZ_FINAL : public WorkerRunnable
{
public:
explicit TimerRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
// Silence bad assertions.
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
// Silence bad assertions.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
return aWorkerPrivate->RunExpiredTimeouts(aCx);
}
};
void
DummyCallback(nsITimer* aTimer, void* aClosure)
{
// Nothing!
}
class TimerThreadEventTarget MOZ_FINAL : public nsIEventTarget
{
~TimerThreadEventTarget() {}
WorkerPrivate* mWorkerPrivate;
nsRefPtr<WorkerRunnable> mWorkerRunnable;
public:
TimerThreadEventTarget(WorkerPrivate* aWorkerPrivate,
WorkerRunnable* aWorkerRunnable)
: mWorkerPrivate(aWorkerPrivate), mWorkerRunnable(aWorkerRunnable)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aWorkerRunnable);
}
NS_DECL_THREADSAFE_ISUPPORTS
protected:
NS_IMETHOD
Dispatch(nsIRunnable* aRunnable, uint32_t aFlags) MOZ_OVERRIDE
{
// This should only happen on the timer thread.
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aFlags == nsIEventTarget::DISPATCH_NORMAL);
nsRefPtr<TimerThreadEventTarget> kungFuDeathGrip = this;
// Run the runnable we're given now (should just call DummyCallback()),
// otherwise the timer thread will leak it... If we run this after
// dispatch running the event can race against resetting the timer.
aRunnable->Run();
// This can fail if we're racing to terminate or cancel, should be handled
// by the terminate or cancel code.
mWorkerRunnable->Dispatch(nullptr);
return NS_OK;
}
NS_IMETHOD
IsOnCurrentThread(bool* aIsOnCurrentThread) MOZ_OVERRIDE
{
MOZ_ASSERT(aIsOnCurrentThread);
nsresult rv = mWorkerPrivate->IsOnCurrentThread(aIsOnCurrentThread);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
};
class KillCloseEventRunnable MOZ_FINAL : public WorkerRunnable
{
nsCOMPtr<nsITimer> mTimer;
class KillScriptRunnable MOZ_FINAL : public WorkerControlRunnable
{
public:
explicit KillScriptRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
// Silence bad assertions, this is dispatched from the timer thread.
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
// Silence bad assertions, this is dispatched from the timer thread.
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
// Kill running script.
return false;
}
};
public:
explicit KillCloseEventRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
bool
SetTimeout(JSContext* aCx, uint32_t aDelayMS)
{
nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (!timer) {
JS_ReportError(aCx, "Failed to create timer!");
return false;
}
nsRefPtr<KillScriptRunnable> runnable =
new KillScriptRunnable(mWorkerPrivate);
nsRefPtr<TimerThreadEventTarget> target =
new TimerThreadEventTarget(mWorkerPrivate, runnable);
if (NS_FAILED(timer->SetTarget(target))) {
JS_ReportError(aCx, "Failed to set timer's target!");
return false;
}
if (NS_FAILED(timer->InitWithFuncCallback(DummyCallback, nullptr, aDelayMS,
nsITimer::TYPE_ONE_SHOT))) {
JS_ReportError(aCx, "Failed to start timer!");
return false;
}
mTimer.swap(timer);
return true;
}
private:
~KillCloseEventRunnable()
{
if (mTimer) {
mTimer->Cancel();
}
}
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
MOZ_CRASH("Don't call Dispatch() on KillCloseEventRunnable!");
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
MOZ_CRASH("Don't call Dispatch() on KillCloseEventRunnable!");
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
if (mTimer) {
mTimer->Cancel();
mTimer = nullptr;
}
return true;
}
};
class UpdateRuntimeOptionsRunnable MOZ_FINAL : public WorkerControlRunnable
{
JS::RuntimeOptions mRuntimeOptions;
public:
UpdateRuntimeOptionsRunnable(
WorkerPrivate* aWorkerPrivate,
const JS::RuntimeOptions& aRuntimeOptions)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mRuntimeOptions(aRuntimeOptions)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
aWorkerPrivate->UpdateRuntimeOptionsInternal(aCx, mRuntimeOptions);
return true;
}
};
class UpdatePreferenceRunnable MOZ_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) MOZ_OVERRIDE
{
aWorkerPrivate->UpdatePreferenceInternal(aCx, mPref, mValue);
return true;
}
};
class UpdateLanguagesRunnable MOZ_FINAL : public WorkerRunnable
{
nsTArray<nsString> mLanguages;
public:
UpdateLanguagesRunnable(WorkerPrivate* aWorkerPrivate,
const nsTArray<nsString>& aLanguages)
: WorkerRunnable(aWorkerPrivate, WorkerThreadModifyBusyCount),
mLanguages(aLanguages)
{ }
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
aWorkerPrivate->UpdateLanguagesInternal(aCx, mLanguages);
return true;
}
};
class UpdateJSWorkerMemoryParameterRunnable MOZ_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) MOZ_OVERRIDE
{
aWorkerPrivate->UpdateJSWorkerMemoryParameterInternal(aCx, mKey, mValue);
return true;
}
};
#ifdef JS_GC_ZEAL
class UpdateGCZealRunnable MOZ_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) MOZ_OVERRIDE
{
aWorkerPrivate->UpdateGCZealInternal(aCx, mGCZeal, mFrequency);
return true;
}
};
#endif
class GarbageCollectRunnable MOZ_FINAL : public WorkerControlRunnable
{
bool mShrinking;
bool mCollectChildren;
public:
GarbageCollectRunnable(WorkerPrivate* aWorkerPrivate, bool aShrinking,
bool aCollectChildren)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mShrinking(aShrinking), mCollectChildren(aCollectChildren)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
// Silence bad assertions, this can be dispatched from either the main
// thread or the timer thread..
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
// Silence bad assertions, this can be dispatched from either the main
// thread or the timer thread..
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
aWorkerPrivate->GarbageCollectInternal(aCx, mShrinking, mCollectChildren);
return true;
}
};
class CycleCollectRunnable : public WorkerControlRunnable
{
bool mCollectChildren;
public:
CycleCollectRunnable(WorkerPrivate* aWorkerPrivate, bool aCollectChildren)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mCollectChildren(aCollectChildren)
{ }
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
aWorkerPrivate->CycleCollectInternal(aCx, mCollectChildren);
return true;
}
};
class OfflineStatusChangeRunnable : public WorkerRunnable
{
public:
OfflineStatusChangeRunnable(WorkerPrivate* aWorkerPrivate, bool aIsOffline)
: WorkerRunnable(aWorkerPrivate, WorkerThreadModifyBusyCount),
mIsOffline(aIsOffline)
{
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
aWorkerPrivate->OfflineStatusChangeEventInternal(aCx, mIsOffline);
return true;
}
private:
bool mIsOffline;
};
class WorkerJSRuntimeStats : public JS::RuntimeStats
{
const nsACString& mRtPath;
public:
explicit WorkerJSRuntimeStats(const nsACString& aRtPath)
: JS::RuntimeStats(JsWorkerMallocSizeOf), mRtPath(aRtPath)
{ }
~WorkerJSRuntimeStats()
{
for (size_t i = 0; i != zoneStatsVector.length(); i++) {
delete static_cast<xpc::ZoneStatsExtras*>(zoneStatsVector[i].extra);
}
for (size_t i = 0; i != compartmentStatsVector.length(); i++) {
delete static_cast<xpc::CompartmentStatsExtras*>(compartmentStatsVector[i].extra);
}
}
virtual void
initExtraZoneStats(JS::Zone* aZone,
JS::ZoneStats* aZoneStats)
MOZ_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);
aZoneStats->extra = extras;
}
virtual void
initExtraCompartmentStats(JSCompartment* aCompartment,
JS::CompartmentStats* aCompartmentStats)
MOZ_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/?!/");
extras->location = nullptr;
aCompartmentStats->extra = extras;
}
};
class MessagePortRunnable MOZ_FINAL : public WorkerRunnable
{
uint64_t mMessagePortSerial;
bool mConnect;
public:
MessagePortRunnable(WorkerPrivate* aWorkerPrivate,
uint64_t aMessagePortSerial,
bool aConnect)
: WorkerRunnable(aWorkerPrivate, aConnect ?
WorkerThreadModifyBusyCount :
WorkerThreadUnchangedBusyCount),
mMessagePortSerial(aMessagePortSerial), mConnect(aConnect)
{ }
private:
~MessagePortRunnable()
{ }
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
if (mConnect) {
return aWorkerPrivate->ConnectMessagePort(aCx, mMessagePortSerial);
}
aWorkerPrivate->DisconnectMessagePort(mMessagePortSerial);
return true;
}
};
#ifdef DEBUG
PRThread*
PRThreadFromThread(nsIThread* aThread)
{
MOZ_ASSERT(aThread);
PRThread* result;
MOZ_ASSERT(NS_SUCCEEDED(aThread->GetPRThread(&result)));
MOZ_ASSERT(result);
return result;
}
#endif // DEBUG
} /* anonymous namespace */
NS_IMPL_ISUPPORTS_INHERITED0(MainThreadReleaseRunnable, nsRunnable)
NS_IMPL_ISUPPORTS_INHERITED0(TopLevelWorkerFinishedRunnable, nsRunnable)
NS_IMPL_ISUPPORTS(TimerThreadEventTarget, nsIEventTarget)
template <class Derived>
class WorkerPrivateParent<Derived>::SynchronizeAndResumeRunnable MOZ_FINAL
: public nsRunnable
{
friend class nsRevocableEventPtr<SynchronizeAndResumeRunnable>;
WorkerPrivate* mWorkerPrivate;
nsCOMPtr<nsPIDOMWindow> mWindow;
public:
SynchronizeAndResumeRunnable(WorkerPrivate* aWorkerPrivate,
nsPIDOMWindow* aWindow)
: mWorkerPrivate(aWorkerPrivate), mWindow(aWindow)
{
AssertIsOnMainThread();
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aWindow);
MOZ_ASSERT(!aWorkerPrivate->GetParent());
}
private:
~SynchronizeAndResumeRunnable()
{ }
NS_IMETHOD
Run() MOZ_OVERRIDE
{
AssertIsOnMainThread();
if (mWorkerPrivate) {
AutoJSAPI jsapi;
if (NS_WARN_IF(!jsapi.InitWithLegacyErrorReporting(mWindow))) {
return NS_OK;
}
JSContext* cx = jsapi.cx();
if (!mWorkerPrivate->Resume(cx, mWindow)) {
JS_ReportPendingException(cx);
}
}
return NS_OK;
}
void
Revoke()
{
AssertIsOnMainThread();
MOZ_ASSERT(mWorkerPrivate);
MOZ_ASSERT(mWindow);
mWorkerPrivate = nullptr;
mWindow = nullptr;
}
};
template <class Derived>
class WorkerPrivateParent<Derived>::EventTarget MOZ_FINAL
: public nsIEventTarget
{
// This mutex protects mWorkerPrivate and must be acquired *before* the
// WorkerPrivate's mutex whenever they must both be held.
mozilla::Mutex mMutex;
WorkerPrivate* mWorkerPrivate;
nsIEventTarget* mWeakNestedEventTarget;
nsCOMPtr<nsIEventTarget> mNestedEventTarget;
public:
explicit EventTarget(WorkerPrivate* aWorkerPrivate)
: mMutex("WorkerPrivateParent::EventTarget::mMutex"),
mWorkerPrivate(aWorkerPrivate), mWeakNestedEventTarget(nullptr)
{
MOZ_ASSERT(aWorkerPrivate);
}
EventTarget(WorkerPrivate* aWorkerPrivate, nsIEventTarget* aNestedEventTarget)
: mMutex("WorkerPrivateParent::EventTarget::mMutex"),
mWorkerPrivate(aWorkerPrivate), mWeakNestedEventTarget(aNestedEventTarget),
mNestedEventTarget(aNestedEventTarget)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aNestedEventTarget);
}
void
Disable()
{
nsCOMPtr<nsIEventTarget> nestedEventTarget;
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(mWorkerPrivate);
mWorkerPrivate = nullptr;
mNestedEventTarget.swap(nestedEventTarget);
}
}
nsIEventTarget*
GetWeakNestedEventTarget() const
{
MOZ_ASSERT(mWeakNestedEventTarget);
return mWeakNestedEventTarget;
}
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIEVENTTARGET
private:
~EventTarget()
{ }
};
struct WorkerPrivate::TimeoutInfo
{
TimeoutInfo()
: mTimeoutCallable(JS::UndefinedValue()), mLineNumber(0), mId(0),
mIsInterval(false), mCanceled(false)
{
MOZ_COUNT_CTOR(mozilla::dom::workers::WorkerPrivate::TimeoutInfo);
}
~TimeoutInfo()
{
MOZ_COUNT_DTOR(mozilla::dom::workers::WorkerPrivate::TimeoutInfo);
}
bool operator==(const TimeoutInfo& aOther)
{
return mTargetTime == aOther.mTargetTime;
}
bool operator<(const TimeoutInfo& aOther)
{
return mTargetTime < aOther.mTargetTime;
}
JS::Heap<JS::Value> mTimeoutCallable;
nsString mTimeoutString;
nsTArray<JS::Heap<JS::Value> > mExtraArgVals;
mozilla::TimeStamp mTargetTime;
mozilla::TimeDuration mInterval;
nsCString mFilename;
uint32_t mLineNumber;
int32_t mId;
bool mIsInterval;
bool mCanceled;
};
class WorkerPrivate::MemoryReporter MOZ_FINAL : public nsIMemoryReporter
{
NS_DECL_THREADSAFE_ISUPPORTS
friend class WorkerPrivate;
SharedMutex mMutex;
WorkerPrivate* mWorkerPrivate;
bool mAlreadyMappedToAddon;
public:
explicit MemoryReporter(WorkerPrivate* aWorkerPrivate)
: mMutex(aWorkerPrivate->mMutex), mWorkerPrivate(aWorkerPrivate),
mAlreadyMappedToAddon(false)
{
aWorkerPrivate->AssertIsOnWorkerThread();
}
NS_IMETHOD
CollectReports(nsIMemoryReporterCallback* aCallback,
nsISupports* aClosure, bool aAnonymize)
{
AssertIsOnMainThread();
// Assumes that WorkerJSRuntimeStats will hold a reference to |path|, and
// not a copy, as TryToMapAddon() may later modify if.
nsCString path;
WorkerJSRuntimeStats rtStats(path);
{
MutexAutoLock lock(mMutex);
path.AppendLiteral("explicit/workers/workers(");
if (aAnonymize && !mWorkerPrivate->Domain().IsEmpty()) {
path.AppendLiteral("<anonymized-domain>)/worker(<anonymized-url>");
} else {
nsCString escapedDomain(mWorkerPrivate->Domain());
if (escapedDomain.IsEmpty()) {
escapedDomain += "chrome";
} else {
escapedDomain.ReplaceChar('/', '\\');
}
path.Append(escapedDomain);
path.AppendLiteral(")/worker(");
NS_ConvertUTF16toUTF8 escapedURL(mWorkerPrivate->ScriptURL());
escapedURL.ReplaceChar('/', '\\');
path.Append(escapedURL);
}
path.AppendPrintf(", 0x%p)/", static_cast<void*>(mWorkerPrivate));
TryToMapAddon(path);
if (!mWorkerPrivate ||
!mWorkerPrivate->BlockAndCollectRuntimeStats(&rtStats, aAnonymize)) {
// Returning NS_OK here will effectively report 0 memory.
return NS_OK;
}
}
return xpc::ReportJSRuntimeExplicitTreeStats(rtStats, path,
aCallback, aClosure,
aAnonymize);
}
private:
~MemoryReporter()
{ }
void
Disable()
{
// Called from WorkerPrivate::DisableMemoryReporter.
mMutex.AssertCurrentThreadOwns();
NS_ASSERTION(mWorkerPrivate, "Disabled more than once!");
mWorkerPrivate = nullptr;
}
// Only call this from the main thread and under mMutex lock.
void
TryToMapAddon(nsACString &path)
{
AssertIsOnMainThread();
mMutex.AssertCurrentThreadOwns();
if (mAlreadyMappedToAddon || !mWorkerPrivate) {
return;
}
nsCOMPtr<nsIURI> scriptURI;
if (NS_FAILED(NS_NewURI(getter_AddRefs(scriptURI),
mWorkerPrivate->ScriptURL()))) {
return;
}
mAlreadyMappedToAddon = true;
if (XRE_GetProcessType() != GeckoProcessType_Default) {
// Only try to access the service from the main process.
return;
}
nsAutoCString addonId;
bool ok;
nsCOMPtr<amIAddonManager> addonManager =
do_GetService("@mozilla.org/addons/integration;1");
if (!addonManager ||
NS_FAILED(addonManager->MapURIToAddonID(scriptURI, addonId, &ok)) ||
!ok) {
return;
}
static const size_t explicitLength = strlen("explicit/");
addonId.Insert(NS_LITERAL_CSTRING("add-ons/"), 0);
addonId += "/";
path.Insert(addonId, explicitLength);
}
};
NS_IMPL_ISUPPORTS(WorkerPrivate::MemoryReporter, nsIMemoryReporter)
WorkerPrivate::SyncLoopInfo::SyncLoopInfo(EventTarget* aEventTarget)
: mEventTarget(aEventTarget), mCompleted(false), mResult(false)
#ifdef DEBUG
, mHasRun(false)
#endif
{
}
// Can't use NS_IMPL_CYCLE_COLLECTION_CLASS(WorkerPrivateParent) because of the
// templates.
template <class Derived>
typename WorkerPrivateParent<Derived>::cycleCollection
WorkerPrivateParent<Derived>::_cycleCollectorGlobal =
WorkerPrivateParent<Derived>::cycleCollection();
template <class Derived>
WorkerPrivateParent<Derived>::WorkerPrivateParent(
JSContext* aCx,
WorkerPrivate* aParent,
const nsAString& aScriptURL,
bool aIsChromeWorker,
WorkerType aWorkerType,
const nsACString& aSharedWorkerName,
LoadInfo& aLoadInfo)
: mMutex("WorkerPrivateParent Mutex"),
mCondVar(mMutex, "WorkerPrivateParent CondVar"),
mMemoryReportCondVar(mMutex, "WorkerPrivateParent Memory Report CondVar"),
mParent(aParent), mScriptURL(aScriptURL),
mSharedWorkerName(aSharedWorkerName), mBusyCount(0), mMessagePortSerial(0),
mParentStatus(Pending), mParentSuspended(false),
mIsChromeWorker(aIsChromeWorker), mMainThreadObjectsForgotten(false),
mWorkerType(aWorkerType),
mCreationTimeStamp(TimeStamp::Now())
{
MOZ_ASSERT_IF(!IsDedicatedWorker(),
!aSharedWorkerName.IsVoid() && NS_IsMainThread());
MOZ_ASSERT_IF(IsDedicatedWorker(), aSharedWorkerName.IsEmpty());
if (aLoadInfo.mWindow) {
AssertIsOnMainThread();
MOZ_ASSERT(aLoadInfo.mWindow->IsInnerWindow(),
"Should have inner window here!");
BindToOwner(aLoadInfo.mWindow);
}
mLoadInfo.StealFrom(aLoadInfo);
if (aParent) {
aParent->AssertIsOnWorkerThread();
aParent->CopyJSSettings(mJSSettings);
MOZ_ASSERT(IsDedicatedWorker());
mNowBaseTimeStamp = aParent->NowBaseTimeStamp();
}
else {
AssertIsOnMainThread();
RuntimeService::GetDefaultJSSettings(mJSSettings);
if (IsDedicatedWorker() && mLoadInfo.mWindow &&
mLoadInfo.mWindow->GetPerformance()) {
mNowBaseTimeStamp = mLoadInfo.mWindow->GetPerformance()->GetDOMTiming()->
GetNavigationStartTimeStamp();
} else {
mNowBaseTimeStamp = CreationTimeStamp();
}
}
}
template <class Derived>
WorkerPrivateParent<Derived>::~WorkerPrivateParent()
{
DropJSObjects(this);
}
template <class Derived>
JSObject*
WorkerPrivateParent<Derived>::WrapObject(JSContext* aCx)
{
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()));
if (wrapper) {
MOZ_ALWAYS_TRUE(TryPreserveWrapper(wrapper));
}
return wrapper;
}
template <class Derived>
nsresult
WorkerPrivateParent<Derived>::DispatchPrivate(WorkerRunnable* aRunnable,
nsIEventTarget* aSyncLoopTarget)
{
// May be called on any thread!
WorkerPrivate* self = ParentAsWorkerPrivate();
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT_IF(aSyncLoopTarget, self->mThread);
if (!self->mThread) {
if (ParentStatus() == Pending || self->mStatus == Pending) {
mPreStartRunnables.AppendElement(aRunnable);
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;
}
nsCOMPtr<nsIEventTarget> target;
if (aSyncLoopTarget) {
target = aSyncLoopTarget;
}
else {
target = self->mThread;
}
nsresult rv = target->Dispatch(aRunnable, NS_DISPATCH_NORMAL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mCondVar.Notify();
}
return NS_OK;
}
template <class Derived>
nsresult
WorkerPrivateParent<Derived>::DispatchControlRunnable(
WorkerControlRunnable* aWorkerControlRunnable)
{
// May be called on any thread!
MOZ_ASSERT(aWorkerControlRunnable);
nsRefPtr<WorkerControlRunnable> runnable = aWorkerControlRunnable;
WorkerPrivate* self = ParentAsWorkerPrivate();
{
MutexAutoLock lock(mMutex);
if (self->mStatus == Dead) {
NS_WARNING("A control runnable was posted to a worker that is already "
"shutting down!");
return NS_ERROR_UNEXPECTED;
}
// Transfer ownership to the control queue.
self->mControlQueue.Push(runnable.forget().take());
if (JSContext* cx = self->mJSContext) {
MOZ_ASSERT(self->mThread);
JSRuntime* rt = JS_GetRuntime(cx);
MOZ_ASSERT(rt);
JS_RequestInterruptCallback(rt);
}
mCondVar.Notify();
}
return NS_OK;
}
template <class Derived>
already_AddRefed<WorkerRunnable>
WorkerPrivateParent<Derived>::MaybeWrapAsWorkerRunnable(nsIRunnable* aRunnable)
{
// May be called on any thread!
MOZ_ASSERT(aRunnable);
nsRefPtr<WorkerRunnable> workerRunnable =
WorkerRunnable::FromRunnable(aRunnable);
if (workerRunnable) {
return workerRunnable.forget();
}
nsCOMPtr<nsICancelableRunnable> cancelable = do_QueryInterface(aRunnable);
if (!cancelable) {
MOZ_CRASH("All runnables destined for a worker thread must be cancelable!");
}
workerRunnable =
new ExternalRunnableWrapper(ParentAsWorkerPrivate(), cancelable);
return workerRunnable.forget();
}
template <class Derived>
already_AddRefed<nsIEventTarget>
WorkerPrivateParent<Derived>::GetEventTarget()
{
WorkerPrivate* self = ParentAsWorkerPrivate();
nsCOMPtr<nsIEventTarget> target;
{
MutexAutoLock lock(mMutex);
if (!mEventTarget &&
ParentStatus() <= Running &&
self->mStatus <= Running) {
mEventTarget = new EventTarget(self);
}
target = mEventTarget;
}
NS_WARN_IF_FALSE(target,
"Requested event target for a worker that is already "
"shutting down!");
return target.forget();
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Start()
{
// May be called on any thread!
{
MutexAutoLock lock(mMutex);
NS_ASSERTION(mParentStatus != Running, "How can this be?!");
if (mParentStatus == Pending) {
mParentStatus = Running;
return true;
}
}
return false;
}
// aCx is null when called from the finalizer
template <class Derived>
bool
WorkerPrivateParent<Derived>::NotifyPrivate(JSContext* aCx, Status aStatus)
{
AssertIsOnParentThread();
bool pending;
{
MutexAutoLock lock(mMutex);
if (mParentStatus >= aStatus) {
return true;
}
pending = mParentStatus == Pending;
mParentStatus = aStatus;
}
if (IsSharedWorker() || IsServiceWorker()) {
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;
}
// Only top-level workers should have a synchronize runnable.
MOZ_ASSERT_IF(mSynchronizeRunnable.get(), !GetParent());
mSynchronizeRunnable.Revoke();
NS_ASSERTION(aStatus != Terminating || mQueuedRunnables.IsEmpty(),
"Shouldn't have anything queued!");
// Anything queued will be discarded.
mQueuedRunnables.Clear();
nsRefPtr<NotifyRunnable> runnable =
new NotifyRunnable(ParentAsWorkerPrivate(), aStatus);
return runnable->Dispatch(aCx);
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Suspend(JSContext* aCx, nsPIDOMWindow* aWindow)
{
AssertIsOnParentThread();
MOZ_ASSERT(aCx);
// Shared workers are only suspended if all of their owning documents are
// suspended. It can happen that mSharedWorkers is empty but this thread has
// not been unregistered yet.
if ((IsSharedWorker() || IsServiceWorker()) && mSharedWorkers.Count()) {
AssertIsOnMainThread();
struct Closure
{
nsPIDOMWindow* mWindow;
bool mAllSuspended;
explicit Closure(nsPIDOMWindow* aWindow)
: mWindow(aWindow), mAllSuspended(true)
{
AssertIsOnMainThread();
// aWindow may be null here.
}
static PLDHashOperator
Suspend(const uint64_t& aKey,
SharedWorker* aSharedWorker,
void* aClosure)
{
AssertIsOnMainThread();
MOZ_ASSERT(aSharedWorker);
MOZ_ASSERT(aClosure);
auto closure = static_cast<Closure*>(aClosure);
if (closure->mWindow && aSharedWorker->GetOwner() == closure->mWindow) {
// Calling Suspend() may change the refcount, ensure that the worker
// outlives this call.
nsRefPtr<SharedWorker> kungFuDeathGrip = aSharedWorker;
aSharedWorker->Suspend();
} else {
MOZ_ASSERT_IF(aSharedWorker->GetOwner() && closure->mWindow,
!SameCOMIdentity(aSharedWorker->GetOwner(),
closure->mWindow));
if (!aSharedWorker->IsSuspended()) {
closure->mAllSuspended = false;
}
}
return PL_DHASH_NEXT;
}
};
Closure closure(aWindow);
mSharedWorkers.EnumerateRead(Closure::Suspend, &closure);
if (!closure.mAllSuspended || mParentSuspended) {
return true;
}
}
// MOZ_ASSERT(!mParentSuspended, "Suspended more than once!");
mParentSuspended = true;
{
MutexAutoLock lock(mMutex);
if (mParentStatus >= Terminating) {
return true;
}
}
nsRefPtr<SuspendRunnable> runnable =
new SuspendRunnable(ParentAsWorkerPrivate());
if (!runnable->Dispatch(aCx)) {
return false;
}
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Resume(JSContext* aCx, nsPIDOMWindow* aWindow)
{
AssertIsOnParentThread();
MOZ_ASSERT(aCx);
MOZ_ASSERT_IF(IsDedicatedWorker(), mParentSuspended);
// Shared workers are resumed if any of their owning documents are resumed.
// It can happen that mSharedWorkers is empty but this thread has not been
// unregistered yet.
if ((IsSharedWorker() || IsServiceWorker()) && mSharedWorkers.Count()) {
AssertIsOnMainThread();
struct Closure
{
nsPIDOMWindow* mWindow;
bool mAnyRunning;
explicit Closure(nsPIDOMWindow* aWindow)
: mWindow(aWindow), mAnyRunning(false)
{
AssertIsOnMainThread();
// aWindow may be null here.
}
static PLDHashOperator
Resume(const uint64_t& aKey,
SharedWorker* aSharedWorker,
void* aClosure)
{
AssertIsOnMainThread();
MOZ_ASSERT(aSharedWorker);
MOZ_ASSERT(aClosure);
auto closure = static_cast<Closure*>(aClosure);
if (closure->mWindow && aSharedWorker->GetOwner() == closure->mWindow) {
// Calling Resume() may change the refcount, ensure that the worker
// outlives this call.
nsRefPtr<SharedWorker> kungFuDeathGrip = aSharedWorker;
aSharedWorker->Resume();
closure->mAnyRunning = true;
} else {
MOZ_ASSERT_IF(aSharedWorker->GetOwner() && closure->mWindow,
!SameCOMIdentity(aSharedWorker->GetOwner(),
closure->mWindow));
if (!aSharedWorker->IsSuspended()) {
closure->mAnyRunning = true;
}
}
return PL_DHASH_NEXT;
}
};
Closure closure(aWindow);
mSharedWorkers.EnumerateRead(Closure::Resume, &closure);
if (!closure.mAnyRunning || !mParentSuspended) {
return true;
}
}
MOZ_ASSERT(mParentSuspended);
mParentSuspended = false;
{
MutexAutoLock lock(mMutex);
if (mParentStatus >= Terminating) {
return true;
}
}
// Only top-level workers should have a synchronize runnable.
MOZ_ASSERT_IF(mSynchronizeRunnable.get(), !GetParent());
mSynchronizeRunnable.Revoke();
// Execute queued runnables before waking up the worker, otherwise the worker
// could post new messages before we run those that have been queued.
if (!mQueuedRunnables.IsEmpty()) {
AssertIsOnMainThread();
MOZ_ASSERT(IsDedicatedWorker());
nsTArray<nsCOMPtr<nsIRunnable>> runnables;
mQueuedRunnables.SwapElements(runnables);
for (uint32_t index = 0; index < runnables.Length(); index++) {
runnables[index]->Run();
}
}
nsRefPtr<ResumeRunnable> runnable =
new ResumeRunnable(ParentAsWorkerPrivate());
if (!runnable->Dispatch(aCx)) {
return false;
}
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::SynchronizeAndResume(
JSContext* aCx,
nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
MOZ_ASSERT(!GetParent());
MOZ_ASSERT_IF(IsDedicatedWorker(), mParentSuspended);
// NB: There may be pending unqueued messages. If we resume here we will
// execute those messages out of order. Instead we post an event to the
// end of the event queue, allowing all of the outstanding messages to be
// queued up in order on the worker. Then and only then we execute all of
// the messages.
nsRefPtr<SynchronizeAndResumeRunnable> runnable =
new SynchronizeAndResumeRunnable(ParentAsWorkerPrivate(), aWindow);
if (NS_FAILED(NS_DispatchToCurrentThread(runnable))) {
JS_ReportError(aCx, "Failed to dispatch to current thread!");
return false;
}
mSynchronizeRunnable = runnable;
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::Close(JSContext* aCx)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
if (mParentStatus < Closing) {
mParentStatus = Closing;
}
}
return true;
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::ModifyBusyCount(JSContext* aCx, bool aIncrease)
{
AssertIsOnParentThread();
NS_ASSERTION(aIncrease || mBusyCount, "Mismatched busy count mods!");
if (aIncrease) {
mBusyCount++;
return true;
}
if (--mBusyCount == 0) {
bool shouldCancel;
{
MutexAutoLock lock(mMutex);
shouldCancel = mParentStatus == Terminating;
}
if (shouldCancel && !Cancel(aCx)) {
return false;
}
}
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::ForgetMainThreadObjects(
nsTArray<nsCOMPtr<nsISupports> >& aDoomed)
{
AssertIsOnParentThread();
MOZ_ASSERT(!mMainThreadObjectsForgotten);
static const uint32_t kDoomedCount = 7;
aDoomed.SetCapacity(kDoomedCount);
SwapToISupportsArray(mLoadInfo.mWindow, aDoomed);
SwapToISupportsArray(mLoadInfo.mScriptContext, aDoomed);
SwapToISupportsArray(mLoadInfo.mBaseURI, aDoomed);
SwapToISupportsArray(mLoadInfo.mResolvedScriptURI, aDoomed);
SwapToISupportsArray(mLoadInfo.mPrincipal, aDoomed);
SwapToISupportsArray(mLoadInfo.mChannel, aDoomed);
SwapToISupportsArray(mLoadInfo.mCSP, aDoomed);
// Before adding anything here update kDoomedCount above!
MOZ_ASSERT(aDoomed.Length() == kDoomedCount);
mMainThreadObjectsForgotten = true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::PostMessageInternal(
JSContext* aCx,
JS::Handle<JS::Value> aMessage,
const Optional<Sequence<JS::Value> >& aTransferable,
bool aToMessagePort,
uint64_t aMessagePortSerial,
ErrorResult& aRv)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
if (mParentStatus > Running) {
return;
}
}
JSStructuredCloneCallbacks* callbacks;
if (GetParent()) {
if (IsChromeWorker()) {
callbacks = &gChromeWorkerStructuredCloneCallbacks;
}
else {
callbacks = &gWorkerStructuredCloneCallbacks;
}
}
else {
AssertIsOnMainThread();
if (IsChromeWorker()) {
callbacks = &gMainThreadChromeWorkerStructuredCloneCallbacks;
}
else {
callbacks = &gMainThreadWorkerStructuredCloneCallbacks;
}
}
JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
if (aTransferable.WasPassed()) {
const Sequence<JS::Value>& realTransferable = aTransferable.Value();
// The input sequence only comes from the generated bindings code, which
// ensures it is rooted.
JS::HandleValueArray elements =
JS::HandleValueArray::fromMarkedLocation(realTransferable.Length(),
realTransferable.Elements());
JSObject* array =
JS_NewArrayObject(aCx, elements);
if (!array) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
transferable.setObject(*array);
}
nsTArray<nsCOMPtr<nsISupports> > clonedObjects;
JSAutoStructuredCloneBuffer buffer;
if (!buffer.write(aCx, aMessage, transferable, callbacks, &clonedObjects)) {
aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
return;
}
nsRefPtr<MessageEventRunnable> runnable =
new MessageEventRunnable(ParentAsWorkerPrivate(),
WorkerRunnable::WorkerThreadModifyBusyCount,
Move(buffer), clonedObjects, aToMessagePort,
aMessagePortSerial);
if (!runnable->Dispatch(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::PostMessageToMessagePort(
JSContext* aCx,
uint64_t aMessagePortSerial,
JS::Handle<JS::Value> aMessage,
const Optional<Sequence<JS::Value>>& aTransferable,
ErrorResult& aRv)
{
AssertIsOnMainThread();
PostMessageInternal(aCx, aMessage, aTransferable, true, aMessagePortSerial,
aRv);
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::DispatchMessageEventToMessagePort(
JSContext* aCx, uint64_t aMessagePortSerial,
JSAutoStructuredCloneBuffer&& aBuffer,
nsTArray<nsCOMPtr<nsISupports>>& aClonedObjects)
{
AssertIsOnMainThread();
JSAutoStructuredCloneBuffer buffer(Move(aBuffer));
nsTArray<nsCOMPtr<nsISupports>> clonedObjects;
clonedObjects.SwapElements(aClonedObjects);
SharedWorker* sharedWorker;
if (!mSharedWorkers.Get(aMessagePortSerial, &sharedWorker)) {
// SharedWorker has already been unregistered?
return true;
}
nsRefPtr<MessagePort> port = sharedWorker->Port();
NS_ASSERTION(port, "SharedWorkers always have a port!");
if (port->IsClosed()) {
return true;
}
AutoJSAPI jsapi;
if (NS_WARN_IF(!jsapi.InitWithLegacyErrorReporting(port->GetParentObject()))) {
return false;
}
JSContext* cx = jsapi.cx();
JS::Rooted<JS::Value> data(cx);
if (!buffer.read(cx, &data, WorkerStructuredCloneCallbacks(true))) {
return false;
}
buffer.clear();
nsRefPtr<MessageEvent> event = new MessageEvent(port, nullptr, nullptr);
nsresult rv =
event->InitMessageEvent(NS_LITERAL_STRING("message"), false, false, data,
EmptyString(), EmptyString(), nullptr);
if (NS_FAILED(rv)) {
xpc::Throw(cx, rv);
return false;
}
event->SetTrusted(true);
nsTArray<nsRefPtr<MessagePortBase>> ports;
ports.AppendElement(port);
nsRefPtr<MessagePortList> portList = new MessagePortList(port, ports);
event->SetPorts(portList);
nsCOMPtr<nsIDOMEvent> domEvent;
CallQueryInterface(event.get(), getter_AddRefs(domEvent));
NS_ASSERTION(domEvent, "This should never fail!");
bool ignored;
rv = port->DispatchEvent(domEvent, &ignored);
if (NS_FAILED(rv)) {
xpc::Throw(cx, rv);
return false;
}
return true;
}
template <class Derived>
uint64_t
WorkerPrivateParent<Derived>::GetInnerWindowId()
{
AssertIsOnMainThread();
NS_ASSERTION(!mLoadInfo.mWindow || mLoadInfo.mWindow->IsInnerWindow(),
"Outer window?");
return mLoadInfo.mWindow ? mLoadInfo.mWindow->WindowID() : 0;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateRuntimeOptions(
JSContext* aCx,
const JS::RuntimeOptions& aRuntimeOptions)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
mJSSettings.runtimeOptions = aRuntimeOptions;
}
nsRefPtr<UpdateRuntimeOptionsRunnable> runnable =
new UpdateRuntimeOptionsRunnable(ParentAsWorkerPrivate(), aRuntimeOptions);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker context options!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdatePreference(JSContext* aCx, WorkerPreference aPref, bool aValue)
{
AssertIsOnParentThread();
MOZ_ASSERT(aPref >= 0 && aPref < WORKERPREF_COUNT);
nsRefPtr<UpdatePreferenceRunnable> runnable =
new UpdatePreferenceRunnable(ParentAsWorkerPrivate(), aPref, aValue);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker preferences!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateLanguages(JSContext* aCx,
const nsTArray<nsString>& aLanguages)
{
AssertIsOnParentThread();
nsRefPtr<UpdateLanguagesRunnable> runnable =
new UpdateLanguagesRunnable(ParentAsWorkerPrivate(), aLanguages);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker languages!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateJSWorkerMemoryParameter(JSContext* aCx,
JSGCParamKey aKey,
uint32_t aValue)
{
AssertIsOnParentThread();
bool found = false;
{
MutexAutoLock lock(mMutex);
found = mJSSettings.ApplyGCSetting(aKey, aValue);
}
if (found) {
nsRefPtr<UpdateJSWorkerMemoryParameterRunnable> runnable =
new UpdateJSWorkerMemoryParameterRunnable(ParentAsWorkerPrivate(), aKey,
aValue);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update memory parameter!");
JS_ClearPendingException(aCx);
}
}
}
#ifdef JS_GC_ZEAL
template <class Derived>
void
WorkerPrivateParent<Derived>::UpdateGCZeal(JSContext* aCx, uint8_t aGCZeal,
uint32_t aFrequency)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
mJSSettings.gcZeal = aGCZeal;
mJSSettings.gcZealFrequency = aFrequency;
}
nsRefPtr<UpdateGCZealRunnable> runnable =
new UpdateGCZealRunnable(ParentAsWorkerPrivate(), aGCZeal, aFrequency);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker gczeal!");
JS_ClearPendingException(aCx);
}
}
#endif
template <class Derived>
void
WorkerPrivateParent<Derived>::GarbageCollect(JSContext* aCx, bool aShrinking)
{
AssertIsOnParentThread();
nsRefPtr<GarbageCollectRunnable> runnable =
new GarbageCollectRunnable(ParentAsWorkerPrivate(), aShrinking,
/* collectChildren = */ true);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to GC worker!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::CycleCollect(JSContext* aCx, bool aDummy)
{
AssertIsOnParentThread();
nsRefPtr<CycleCollectRunnable> runnable =
new CycleCollectRunnable(ParentAsWorkerPrivate(),
/* collectChildren = */ true);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to CC worker!");
JS_ClearPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::OfflineStatusChangeEvent(JSContext* aCx, bool aIsOffline)
{
AssertIsOnParentThread();
nsRefPtr<OfflineStatusChangeRunnable> runnable =
new OfflineStatusChangeRunnable(ParentAsWorkerPrivate(), aIsOffline);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to dispatch offline status change event!");
JS_ClearPendingException(aCx);
}
}
void
WorkerPrivate::OfflineStatusChangeEventInternal(JSContext* aCx, bool aIsOffline)
{
AssertIsOnWorkerThread();
// The worker is already in this state. No need to dispatch an event.
if (mOnLine == !aIsOffline) {
return;
}
for (uint32_t index = 0; index < mChildWorkers.Length(); ++index) {
mChildWorkers[index]->OfflineStatusChangeEvent(aCx, aIsOffline);
}
mOnLine = !aIsOffline;
WorkerGlobalScope* globalScope = GlobalScope();
nsRefPtr<WorkerNavigator> nav = globalScope->GetExistingNavigator();
if (nav) {
nav->SetOnLine(mOnLine);
}
nsString eventType;
if (aIsOffline) {
eventType.AssignLiteral("offline");
} else {
eventType.AssignLiteral("online");
}
nsCOMPtr<nsIDOMEvent> event;
nsresult rv =
NS_NewDOMEvent(getter_AddRefs(event), globalScope, nullptr, nullptr);
NS_ENSURE_SUCCESS_VOID(rv);
rv = event->InitEvent(eventType, false, false);
NS_ENSURE_SUCCESS_VOID(rv);
event->SetTrusted(true);
globalScope->DispatchDOMEvent(nullptr, event, nullptr, nullptr);
}
template <class Derived>
bool
WorkerPrivateParent<Derived>::RegisterSharedWorker(JSContext* aCx,
SharedWorker* aSharedWorker)
{
AssertIsOnMainThread();
MOZ_ASSERT(aSharedWorker);
MOZ_ASSERT(IsSharedWorker() || IsServiceWorker());
MOZ_ASSERT(!mSharedWorkers.Get(aSharedWorker->Serial()));
if (IsSharedWorker()) {
nsRefPtr<MessagePortRunnable> runnable =
new MessagePortRunnable(ParentAsWorkerPrivate(), aSharedWorker->Serial(),
true);
if (!runnable->Dispatch(aCx)) {
return false;
}
}
mSharedWorkers.Put(aSharedWorker->Serial(), aSharedWorker);
// If there were other SharedWorker objects attached to this worker then they
// may all have been suspended and this worker would need to be resumed.
if (mSharedWorkers.Count() > 1 && !Resume(aCx, nullptr)) {
return false;
}
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UnregisterSharedWorker(
JSContext* aCx,
SharedWorker* aSharedWorker)
{
AssertIsOnMainThread();
MOZ_ASSERT(aSharedWorker);
MOZ_ASSERT(IsSharedWorker() || IsServiceWorker());
MOZ_ASSERT(mSharedWorkers.Get(aSharedWorker->Serial()));
nsRefPtr<MessagePortRunnable> runnable =
new MessagePortRunnable(ParentAsWorkerPrivate(), aSharedWorker->Serial(),
false);
if (!runnable->Dispatch(aCx)) {
JS_ReportPendingException(aCx);
}
mSharedWorkers.Remove(aSharedWorker->Serial());
// If there are still SharedWorker objects attached to this worker then they
// may all be suspended and this worker would need to be suspended. Otherwise,
// if that was the last SharedWorker then it's time to cancel this worker.
if (mSharedWorkers.Count()) {
if (!Suspend(aCx, nullptr)) {
JS_ReportPendingException(aCx);
}
} else if (!Cancel(aCx)) {
JS_ReportPendingException(aCx);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::BroadcastErrorToSharedWorkers(
JSContext* aCx,
const nsAString& aMessage,
const nsAString& aFilename,
const nsAString& aLine,
uint32_t aLineNumber,
uint32_t aColumnNumber,
uint32_t aFlags)
{
AssertIsOnMainThread();
nsAutoTArray<nsRefPtr<SharedWorker>, 10> sharedWorkers;
GetAllSharedWorkers(sharedWorkers);
if (sharedWorkers.IsEmpty()) {
return;
}
nsAutoTArray<WindowAction, 10> windowActions;
nsresult rv;
// First fire the error event at all SharedWorker objects. This may include
// multiple objects in a single window as well as objects in different
// windows.
for (size_t index = 0; index < sharedWorkers.Length(); index++) {
nsRefPtr<SharedWorker>& sharedWorker = sharedWorkers[index];
// May be null.
nsPIDOMWindow* window = sharedWorker->GetOwner();
RootedDictionary<ErrorEventInit> errorInit(aCx);
errorInit.mBubbles = false;
errorInit.mCancelable = true;
errorInit.mMessage = aMessage;
errorInit.mFilename = aFilename;
errorInit.mLineno = aLineNumber;
errorInit.mColno = aColumnNumber;
nsRefPtr<ErrorEvent> errorEvent =
ErrorEvent::Constructor(sharedWorker, NS_LITERAL_STRING("error"),
errorInit);
if (!errorEvent) {
ThrowAndReport(window, NS_ERROR_UNEXPECTED);
continue;
}
errorEvent->SetTrusted(true);
bool defaultActionEnabled;
nsresult rv = sharedWorker->DispatchEvent(errorEvent, &defaultActionEnabled);
if (NS_FAILED(rv)) {
ThrowAndReport(window, rv);
continue;
}
if (defaultActionEnabled) {
// Add the owning window to our list so that we will fire an error event
// at it later.
if (!windowActions.Contains(window)) {
windowActions.AppendElement(WindowAction(window));
}
} else {
size_t actionsIndex = windowActions.LastIndexOf(WindowAction(window));
if (actionsIndex != windowActions.NoIndex) {
// Any listener that calls preventDefault() will prevent the window from
// receiving the error event.
windowActions[actionsIndex].mDefaultAction = false;
}
}
}
// If there are no windows to consider further then we're done.
if (windowActions.IsEmpty()) {
return;
}
bool shouldLogErrorToConsole = true;
// Now fire error events at all the windows remaining.
for (uint32_t index = 0; index < windowActions.Length(); index++) {
WindowAction& windowAction = windowActions[index];
// If there is no window or the script already called preventDefault then
// skip this window.
if (!windowAction.mWindow || !windowAction.mDefaultAction) {
continue;
}
nsCOMPtr<nsIScriptGlobalObject> sgo =
do_QueryInterface(windowAction.mWindow);
MOZ_ASSERT(sgo);
MOZ_ASSERT(NS_IsMainThread());
RootedDictionary<ErrorEventInit> init(aCx);
init.mLineno = aLineNumber;
init.mFilename = aFilename;
init.mMessage = aMessage;
init.mCancelable = true;
init.mBubbles = true;
nsEventStatus status = nsEventStatus_eIgnore;
rv = sgo->HandleScriptError(init, &status);
if (NS_FAILED(rv)) {
ThrowAndReport(windowAction.mWindow, rv);
continue;
}
if (status == nsEventStatus_eConsumeNoDefault) {
shouldLogErrorToConsole = false;
}
}
// Finally log a warning in the console if no window tried to prevent it.
if (shouldLogErrorToConsole) {
LogErrorToConsole(aMessage, aFilename, aLine, aLineNumber, aColumnNumber,
aFlags, 0);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::GetAllSharedWorkers(
nsTArray<nsRefPtr<SharedWorker>>& aSharedWorkers)
{
AssertIsOnMainThread();
MOZ_ASSERT(IsSharedWorker() || IsServiceWorker());
struct Helper
{
static PLDHashOperator
Collect(const uint64_t& aKey,
SharedWorker* aSharedWorker,
void* aClosure)
{
AssertIsOnMainThread();
MOZ_ASSERT(aSharedWorker);
MOZ_ASSERT(aClosure);
auto array = static_cast<nsTArray<nsRefPtr<SharedWorker>>*>(aClosure);
array->AppendElement(aSharedWorker);
return PL_DHASH_NEXT;
}
};
if (!aSharedWorkers.IsEmpty()) {
aSharedWorkers.Clear();
}
mSharedWorkers.EnumerateRead(Helper::Collect, &aSharedWorkers);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::CloseSharedWorkersForWindow(
nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
MOZ_ASSERT(IsSharedWorker() || IsServiceWorker());
MOZ_ASSERT(aWindow);
struct Closure
{
nsPIDOMWindow* mWindow;
nsAutoTArray<nsRefPtr<SharedWorker>, 10> mSharedWorkers;
explicit Closure(nsPIDOMWindow* aWindow)
: mWindow(aWindow)
{
AssertIsOnMainThread();
MOZ_ASSERT(aWindow);
}
static PLDHashOperator
Collect(const uint64_t& aKey,
SharedWorker* aSharedWorker,
void* aClosure)
{
AssertIsOnMainThread();
MOZ_ASSERT(aSharedWorker);
MOZ_ASSERT(aClosure);
auto closure = static_cast<Closure*>(aClosure);
MOZ_ASSERT(closure->mWindow);
if (aSharedWorker->GetOwner() == closure->mWindow) {
closure->mSharedWorkers.AppendElement(aSharedWorker);
} else {
MOZ_ASSERT(!SameCOMIdentity(aSharedWorker->GetOwner(),
closure->mWindow));
}
return PL_DHASH_NEXT;
}
};
Closure closure(aWindow);
mSharedWorkers.EnumerateRead(Closure::Collect, &closure);
for (uint32_t index = 0; index < closure.mSharedWorkers.Length(); index++) {
closure.mSharedWorkers[index]->Close();
}
}
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();
}
if (NS_FAILED(aBaseURI->GetHost(mLocationInfo.mHostname))) {
mLocationInfo.mHostname.Truncate();
}
if (NS_FAILED(aBaseURI->GetPath(mLocationInfo.mPathname))) {
mLocationInfo.mPathname.Truncate();
}
nsCString temp;
nsCOMPtr<nsIURL> url(do_QueryInterface(aBaseURI));
if (url && NS_SUCCEEDED(url->GetQuery(temp)) && !temp.IsEmpty()) {
mLocationInfo.mSearch.Assign('?');
mLocationInfo.mSearch.Append(temp);
}
if (NS_SUCCEEDED(aBaseURI->GetRef(temp)) && !temp.IsEmpty()) {
nsCOMPtr<nsITextToSubURI> converter =
do_GetService(NS_ITEXTTOSUBURI_CONTRACTID);
if (converter) {
nsCString charset;
nsAutoString unicodeRef;
if (NS_SUCCEEDED(aBaseURI->GetOriginCharset(charset)) &&
NS_SUCCEEDED(converter->UnEscapeURIForUI(charset, temp,
unicodeRef))) {
mLocationInfo.mHash.Assign('#');
mLocationInfo.mHash.Append(NS_ConvertUTF16toUTF8(unicodeRef));
}
}
if (mLocationInfo.mHash.IsEmpty()) {
mLocationInfo.mHash.Assign('#');
mLocationInfo.mHash.Append(temp);
}
}
if (NS_SUCCEEDED(aBaseURI->GetScheme(mLocationInfo.mProtocol))) {
mLocationInfo.mProtocol.Append(':');
}
else {
mLocationInfo.mProtocol.Truncate();
}
int32_t port;
if (NS_SUCCEEDED(aBaseURI->GetPort(&port)) && port != -1) {
mLocationInfo.mPort.AppendInt(port);
nsAutoCString host(mLocationInfo.mHostname);
host.Append(':');
host.Append(mLocationInfo.mPort);
mLocationInfo.mHost.Assign(host);
}
else {
mLocationInfo.mHost.Assign(mLocationInfo.mHostname);
}
nsContentUtils::GetUTFOrigin(aBaseURI, mLocationInfo.mOrigin);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::SetPrincipal(nsIPrincipal* aPrincipal)
{
AssertIsOnMainThread();
mLoadInfo.mPrincipal = aPrincipal;
mLoadInfo.mPrincipalIsSystem = nsContentUtils::IsSystemPrincipal(aPrincipal);
uint16_t appStatus = aPrincipal->GetAppStatus();
mLoadInfo.mIsInPrivilegedApp =
(appStatus == nsIPrincipal::APP_STATUS_CERTIFIED ||
appStatus == nsIPrincipal::APP_STATUS_PRIVILEGED);
mLoadInfo.mIsInCertifiedApp = (appStatus == nsIPrincipal::APP_STATUS_CERTIFIED);
}
template <class Derived>
JSContext*
WorkerPrivateParent<Derived>::ParentJSContext() const
{
AssertIsOnParentThread();
if (mParent) {
return mParent->GetJSContext();
}
AssertIsOnMainThread();
return mLoadInfo.mScriptContext ?
mLoadInfo.mScriptContext->GetNativeContext() :
nsContentUtils::GetSafeJSContext();
}
template <class Derived>
void
WorkerPrivateParent<Derived>::RegisterHostObjectURI(const nsACString& aURI)
{
AssertIsOnMainThread();
mHostObjectURIs.AppendElement(aURI);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::UnregisterHostObjectURI(const nsACString& aURI)
{
AssertIsOnMainThread();
mHostObjectURIs.RemoveElement(aURI);
}
template <class Derived>
void
WorkerPrivateParent<Derived>::StealHostObjectURIs(nsTArray<nsCString>& aArray)
{
aArray.SwapElements(mHostObjectURIs);
}
template <class Derived>
NS_IMPL_ADDREF_INHERITED(WorkerPrivateParent<Derived>, DOMEventTargetHelper)
template <class Derived>
NS_IMPL_RELEASE_INHERITED(WorkerPrivateParent<Derived>, DOMEventTargetHelper)
template <class Derived>
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(WorkerPrivateParent<Derived>)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
DOMEventTargetHelper)
tmp->AssertIsOnParentThread();
// The WorkerPrivate::mSelfRef has a reference to itself, which is really
// held by the worker thread. We traverse this reference if and only if our
// busy count is zero and we have not released the main thread reference.
// We do not unlink it. This allows the CC to break cycles involving the
// WorkerPrivate and begin shutting it down (which does happen in unlink) but
// ensures that the WorkerPrivate won't be deleted before we're done shutting
// down the thread.
if (!tmp->mBusyCount && !tmp->mMainThreadObjectsForgotten) {
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSelfRef)
}
// The various strong references in LoadInfo are managed manually and cannot
// be cycle collected.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
DOMEventTargetHelper)
tmp->Terminate(nullptr);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
DOMEventTargetHelper)
tmp->AssertIsOnParentThread();
NS_IMPL_CYCLE_COLLECTION_TRACE_END
#ifdef DEBUG
template <class Derived>
void
WorkerPrivateParent<Derived>::AssertIsOnParentThread() const
{
if (GetParent()) {
GetParent()->AssertIsOnWorkerThread();
}
else {
AssertIsOnMainThread();
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::AssertInnerWindowIsCorrect() const
{
AssertIsOnParentThread();
// Only care about top level workers from windows.
if (mParent || !mLoadInfo.mWindow) {
return;
}
AssertIsOnMainThread();
nsPIDOMWindow* outer = mLoadInfo.mWindow->GetOuterWindow();
NS_ASSERTION(outer && outer->GetCurrentInnerWindow() == mLoadInfo.mWindow,
"Inner window no longer correct!");
}
#endif
WorkerPrivate::WorkerPrivate(JSContext* aCx,
WorkerPrivate* aParent,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsACString& aSharedWorkerName,
LoadInfo& aLoadInfo)
: WorkerPrivateParent<WorkerPrivate>(aCx, aParent, aScriptURL,
aIsChromeWorker, aWorkerType,
aSharedWorkerName, aLoadInfo),
mJSContext(nullptr), mErrorHandlerRecursionCount(0), mNextTimeoutId(1),
mStatus(Pending), mSuspended(false), mTimerRunning(false),
mRunningExpiredTimeouts(false), mCloseHandlerStarted(false),
mCloseHandlerFinished(false), mMemoryReporterRunning(false),
mBlockedForMemoryReporter(false), mCancelAllPendingRunnables(false),
mPeriodicGCTimerRunning(false), mIdleGCTimerRunning(false),
mWorkerScriptExecutedSuccessfully(false)
#ifdef DEBUG
, mPRThread(nullptr)
#endif
{
MOZ_ASSERT_IF(!IsDedicatedWorker(), !aSharedWorkerName.IsVoid());
MOZ_ASSERT_IF(IsDedicatedWorker(), aSharedWorkerName.IsEmpty());
if (aParent) {
aParent->AssertIsOnWorkerThread();
aParent->GetAllPreferences(mPreferences);
mOnLine = aParent->OnLine();
}
else {
AssertIsOnMainThread();
RuntimeService::GetDefaultPreferences(mPreferences);
mOnLine = !NS_IsOffline() && !NS_IsAppOffline(aLoadInfo.mPrincipal);
}
}
WorkerPrivate::~WorkerPrivate()
{
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
ErrorResult& aRv)
{
return WorkerPrivate::Constructor(aGlobal, aScriptURL, false,
WorkerTypeDedicated, EmptyCString(),
nullptr, aRv);
}
// static
bool
WorkerPrivate::WorkerAvailable(JSContext* /* unused */, JSObject* /* unused */)
{
// If we're already on a worker workers are clearly enabled.
if (!NS_IsMainThread()) {
return true;
}
// If our caller is chrome, workers are always available.
if (nsContentUtils::IsCallerChrome()) {
return true;
}
// Else check the pref.
return Preferences::GetBool(PREF_WORKERS_ENABLED);
}
// static
already_AddRefed<ChromeWorkerPrivate>
ChromeWorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
ErrorResult& aRv)
{
return WorkerPrivate::Constructor(aGlobal, aScriptURL, true,
WorkerTypeDedicated, EmptyCString(),
nullptr, aRv)
.downcast<ChromeWorkerPrivate>();
}
// static
bool
ChromeWorkerPrivate::WorkerAvailable(JSContext* aCx, JSObject* /* unused */)
{
// Chrome is always allowed to use workers, and content is never
// allowed to use ChromeWorker, so all we have to check is the
// caller. However, chrome workers apparently might not have a
// system principal, so we have to check for them manually.
if (NS_IsMainThread()) {
return nsContentUtils::IsCallerChrome();
}
return GetWorkerPrivateFromContext(aCx)->IsChromeWorker();
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsACString& aSharedWorkerName,
LoadInfo* aLoadInfo, ErrorResult& aRv)
{
JSContext* cx = aGlobal.Context();
return Constructor(cx, aScriptURL, aIsChromeWorker, aWorkerType,
aSharedWorkerName, aLoadInfo, aRv);
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(JSContext* aCx,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsACString& aSharedWorkerName,
LoadInfo* aLoadInfo, ErrorResult& aRv)
{
WorkerPrivate* parent = NS_IsMainThread() ?
nullptr :
GetCurrentThreadWorkerPrivate();
if (parent) {
parent->AssertIsOnWorkerThread();
} else {
AssertIsOnMainThread();
}
MOZ_ASSERT_IF(aWorkerType != WorkerTypeDedicated,
!aSharedWorkerName.IsVoid());
MOZ_ASSERT_IF(aWorkerType == WorkerTypeDedicated,
aSharedWorkerName.IsEmpty());
Maybe<LoadInfo> stackLoadInfo;
if (!aLoadInfo) {
stackLoadInfo.emplace();
nsresult rv = GetLoadInfo(aCx, nullptr, parent, aScriptURL,
aIsChromeWorker, stackLoadInfo.ptr());
if (NS_FAILED(rv)) {
scriptloader::ReportLoadError(aCx, aScriptURL, rv, !parent);
aRv.Throw(rv);
return nullptr;
}
aLoadInfo = stackLoadInfo.ptr();
}
// NB: This has to be done before creating the WorkerPrivate, because it will
// attempt to use static variables that are initialized in the RuntimeService
// constructor.
RuntimeService* runtimeService;
if (!parent) {
runtimeService = RuntimeService::GetOrCreateService();
if (!runtimeService) {
JS_ReportError(aCx, "Failed to create runtime service!");
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
}
else {
runtimeService = RuntimeService::GetService();
}
MOZ_ASSERT(runtimeService);
nsRefPtr<WorkerPrivate> worker =
new WorkerPrivate(aCx, parent, aScriptURL, aIsChromeWorker,
aWorkerType, aSharedWorkerName, *aLoadInfo);
if (!runtimeService->RegisterWorker(aCx, worker)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
nsRefPtr<CompileScriptRunnable> compiler = new CompileScriptRunnable(worker);
if (!compiler->Dispatch(aCx)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
worker->mSelfRef = worker;
return worker.forget();
}
// static
nsresult
WorkerPrivate::GetLoadInfo(JSContext* aCx, nsPIDOMWindow* aWindow,
WorkerPrivate* aParent, const nsAString& aScriptURL,
bool aIsChromeWorker, LoadInfo* aLoadInfo)
{
using namespace mozilla::dom::workers::scriptloader;
MOZ_ASSERT(aCx);
MOZ_ASSERT_IF(NS_IsMainThread(), aCx == nsContentUtils::GetCurrentJSContext());
if (aWindow) {
AssertIsOnMainThread();
}
LoadInfo loadInfo;
nsresult rv;
if (aParent) {
aParent->AssertIsOnWorkerThread();
// If the parent is going away give up now.
Status parentStatus;
{
MutexAutoLock lock(aParent->mMutex);
parentStatus = aParent->mStatus;
}
if (parentStatus > Running) {
NS_WARNING("Cannot create child workers from the close handler!");
return NS_ERROR_FAILURE;
}
// StartAssignment() is used instead getter_AddRefs because, getter_AddRefs
// does QI in debug build and, if this worker runs in a child process,
// HttpChannelChild will crash because it's not thread-safe.
rv = ChannelFromScriptURLWorkerThread(aCx, aParent, aScriptURL,
loadInfo.mChannel.StartAssignment());
NS_ENSURE_SUCCESS(rv, rv);
// Now that we've spun the loop there's no guarantee that our parent is
// still alive. We may have received control messages initiating shutdown.
{
MutexAutoLock lock(aParent->mMutex);
parentStatus = aParent->mStatus;
}
if (parentStatus > Running) {
nsCOMPtr<nsIThread> mainThread;
if (NS_FAILED(NS_GetMainThread(getter_AddRefs(mainThread))) ||
NS_FAILED(NS_ProxyRelease(mainThread, loadInfo.mChannel))) {
NS_WARNING("Failed to proxy release of channel, leaking instead!");
}
return NS_ERROR_FAILURE;
}
loadInfo.mDomain = aParent->Domain();
} else {
AssertIsOnMainThread();
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
MOZ_ASSERT(ssm);
bool isChrome = nsContentUtils::IsCallerChrome();
// First check to make sure the caller has permission to make a privileged
// worker if they called the ChromeWorker/ChromeSharedWorker constructor.
if (aIsChromeWorker && !isChrome) {
return NS_ERROR_DOM_SECURITY_ERR;
}
// Chrome callers (whether ChromeWorker of Worker) always get the system
// principal here as they're allowed to load anything. The script loader may
// change the principal later depending on the script uri.
if (isChrome) {
rv = ssm->GetSystemPrincipal(getter_AddRefs(loadInfo.mPrincipal));
NS_ENSURE_SUCCESS(rv, rv);
}
// See if we're being called from a window.
nsCOMPtr<nsPIDOMWindow> globalWindow = aWindow;
if (!globalWindow) {
nsCOMPtr<nsIScriptGlobalObject> scriptGlobal =
nsJSUtils::GetStaticScriptGlobal(JS::CurrentGlobalOrNull(aCx));
if (scriptGlobal) {
globalWindow = do_QueryInterface(scriptGlobal);
MOZ_ASSERT(globalWindow);
}
}
nsCOMPtr<nsIDocument> document;
if (globalWindow) {
// Only use the current inner window, and only use it if the caller can
// access it.
nsPIDOMWindow* outerWindow = globalWindow->GetOuterWindow();
if (outerWindow) {
loadInfo.mWindow = outerWindow->GetCurrentInnerWindow();
}
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();
// Use the document's NodePrincipal as our principal if we're not being
// called from chrome.
if (!loadInfo.mPrincipal) {
loadInfo.mPrincipal = document->NodePrincipal();
NS_ENSURE_TRUE(loadInfo.mPrincipal, NS_ERROR_FAILURE);
// We use the document's base domain to limit the number of workers
// each domain can create. For sandboxed documents, we use the domain
// of their first non-sandboxed document, walking up until we find
// one. If we can't find one, we fall back to using the GUID of the
// null principal as the base domain.
if (document->GetSandboxFlags() & SANDBOXED_ORIGIN) {
nsCOMPtr<nsIDocument> tmpDoc = document;
do {
tmpDoc = tmpDoc->GetParentDocument();
} while (tmpDoc && tmpDoc->GetSandboxFlags() & SANDBOXED_ORIGIN);
if (tmpDoc) {
// There was an unsandboxed ancestor, yay!
nsCOMPtr<nsIPrincipal> tmpPrincipal = tmpDoc->NodePrincipal();
rv = tmpPrincipal->GetBaseDomain(loadInfo.mDomain);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// No unsandboxed ancestor, use our GUID.
rv = loadInfo.mPrincipal->GetBaseDomain(loadInfo.mDomain);
NS_ENSURE_SUCCESS(rv, rv);
}
} else {
// Document creating the worker is not sandboxed.
rv = loadInfo.mPrincipal->GetBaseDomain(loadInfo.mDomain);
NS_ENSURE_SUCCESS(rv, rv);
}
}
nsCOMPtr<nsIPermissionManager> permMgr =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t perm;
rv = permMgr->TestPermissionFromPrincipal(loadInfo.mPrincipal, "systemXHR",
&perm);
NS_ENSURE_SUCCESS(rv, rv);
loadInfo.mXHRParamsAllowed = perm == nsIPermissionManager::ALLOW_ACTION;
uint16_t appStatus = loadInfo.mPrincipal->GetAppStatus();
loadInfo.mIsInPrivilegedApp =
(appStatus == nsIPrincipal::APP_STATUS_CERTIFIED ||
appStatus == nsIPrincipal::APP_STATUS_PRIVILEGED);
loadInfo.mIsInCertifiedApp = (appStatus == nsIPrincipal::APP_STATUS_CERTIFIED);
} 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;
}
MOZ_ASSERT(loadInfo.mPrincipal);
MOZ_ASSERT(isChrome || !loadInfo.mDomain.IsEmpty());
if (!nsContentUtils::GetContentSecurityPolicy(getter_AddRefs(loadInfo.mCSP))) {
NS_WARNING("Failed to get CSP!");
return NS_ERROR_FAILURE;
}
if (loadInfo.mCSP) {
rv = loadInfo.mCSP->GetAllowsEval(&loadInfo.mReportCSPViolations,
&loadInfo.mEvalAllowed);
NS_ENSURE_SUCCESS(rv, rv);
} else {
loadInfo.mEvalAllowed = true;
loadInfo.mReportCSPViolations = false;
}
rv = ChannelFromScriptURLMainThread(loadInfo.mPrincipal, loadInfo.mBaseURI,
document, aScriptURL,
getter_AddRefs(loadInfo.mChannel));
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_GetFinalChannelURI(loadInfo.mChannel,
getter_AddRefs(loadInfo.mResolvedScriptURI));
NS_ENSURE_SUCCESS(rv, rv);
}
aLoadInfo->StealFrom(loadInfo);
return NS_OK;
}
void
WorkerPrivate::DoRunLoop(JSContext* aCx)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mThread);
{
MutexAutoLock lock(mMutex);
mJSContext = aCx;
MOZ_ASSERT(mStatus == Pending);
mStatus = Running;
}
EnableMemoryReporter();
InitializeGCTimers();
Maybe<JSAutoCompartment> workerCompartment;
for (;;) {
// Workers lazily create a global object in CompileScriptRunnable. We need
// to enter the global's compartment as soon as it has been created.
if (!workerCompartment && GlobalScope()) {
workerCompartment.emplace(aCx, GlobalScope()->GetGlobalJSObject());
}
Status currentStatus;
bool normalRunnablesPending = false;
{
MutexAutoLock lock(mMutex);
while (mControlQueue.IsEmpty() &&
!(normalRunnablesPending = NS_HasPendingEvents(mThread))) {
WaitForWorkerEvents();
}
ProcessAllControlRunnablesLocked();
currentStatus = mStatus;
}
// If the close handler has finished and all features are done then we can
// kill this thread.
if (currentStatus != Running && !HasActiveFeatures()) {
if (mCloseHandlerFinished && currentStatus != Killing) {
if (!NotifyInternal(aCx, Killing)) {
JS_ReportPendingException(aCx);
}
#ifdef DEBUG
{
MutexAutoLock lock(mMutex);
currentStatus = mStatus;
}
MOZ_ASSERT(currentStatus == Killing);
#else
currentStatus = Killing;
#endif
}
// If we're supposed to die then we should exit the loop.
if (currentStatus == Killing) {
ShutdownGCTimers();
DisableMemoryReporter();
{
MutexAutoLock lock(mMutex);
mStatus = Dead;
mJSContext = nullptr;
}
// After mStatus is set to Dead there can be no more
// WorkerControlRunnables so no need to lock here.
if (!mControlQueue.IsEmpty()) {
WorkerControlRunnable* runnable;
while (mControlQueue.Pop(runnable)) {
runnable->Cancel();
runnable->Release();
}
}
// Clear away our MessagePorts.
mWorkerPorts.Clear();
// Unroot the global
mScope = nullptr;
return;
}
}
// Nothing to do here if we don't have any runnables in the main queue.
if (!normalRunnablesPending) {
SetGCTimerMode(IdleTimer);
continue;
}
MOZ_ASSERT(NS_HasPendingEvents(mThread));
// Start the periodic GC timer if it is not already running.
SetGCTimerMode(PeriodicTimer);
// Process a single runnable from the main queue.
MOZ_ALWAYS_TRUE(NS_ProcessNextEvent(mThread, false));
if (NS_HasPendingEvents(mThread)) {
// Now *might* be a good time to GC. Let the JS engine make the decision.
if (workerCompartment) {
JS_MaybeGC(aCx);
}
}
else {
// The normal event queue has been exhausted, cancel the periodic GC timer
// and schedule the idle GC timer.
SetGCTimerMode(IdleTimer);
}
}
MOZ_CRASH("Shouldn't get here!");
}
void
WorkerPrivate::OnProcessNextEvent(uint32_t aRecursionDepth)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(aRecursionDepth);
// 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 (aRecursionDepth > 1 &&
mSyncLoopStack.Length() < aRecursionDepth - 1) {
ProcessAllControlRunnables();
}
}
void
WorkerPrivate::AfterProcessNextEvent(uint32_t aRecursionDepth)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(aRecursionDepth);
}
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);
nsRefPtr<GarbageCollectRunnable> runnable =
new GarbageCollectRunnable(this, false, false);
mPeriodicGCTimerTarget = new TimerThreadEventTarget(this, runnable);
runnable = new GarbageCollectRunnable(this, true, false);
mIdleGCTimerTarget = new TimerThreadEventTarget(this, runnable);
mPeriodicGCTimerRunning = false;
mIdleGCTimerRunning = false;
}
void
WorkerPrivate::SetGCTimerMode(GCTimerMode aMode)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mGCTimer);
MOZ_ASSERT(mPeriodicGCTimerTarget);
MOZ_ASSERT(mIdleGCTimerTarget);
if ((aMode == PeriodicTimer && mPeriodicGCTimerRunning) ||
(aMode == IdleTimer && mIdleGCTimerRunning)) {
return;
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mGCTimer->Cancel()));
mPeriodicGCTimerRunning = false;
mIdleGCTimerRunning = false;
LOG(("Worker %p canceled GC timer because %s\n", this,
aMode == PeriodicTimer ?
"periodic" :
aMode == IdleTimer ? "idle" : "none"));
if (aMode == NoTimer) {
return;
}
MOZ_ASSERT(aMode == PeriodicTimer || aMode == IdleTimer);
nsIEventTarget* target;
uint32_t delay;
int16_t type;
if (aMode == PeriodicTimer) {
target = mPeriodicGCTimerTarget;
delay = PERIODIC_GC_TIMER_DELAY_SEC * 1000;
type = nsITimer::TYPE_REPEATING_SLACK;
}
else {
target = mIdleGCTimerTarget;
delay = IDLE_GC_TIMER_DELAY_SEC * 1000;
type = nsITimer::TYPE_ONE_SHOT;
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mGCTimer->SetTarget(target)));
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mGCTimer->InitWithFuncCallback(DummyCallback,
nullptr, delay,
type)));
if (aMode == PeriodicTimer) {
LOG(("Worker %p scheduled periodic GC timer\n", this));
mPeriodicGCTimerRunning = true;
}
else {
LOG(("Worker %p scheduled idle GC timer\n", this));
mIdleGCTimerRunning = true;
}
}
void
WorkerPrivate::ShutdownGCTimers()
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mGCTimer);
// Always make sure the timer is canceled.
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mGCTimer->Cancel()));
LOG(("Worker %p killed the GC timer\n", this));
mGCTimer = nullptr;
mPeriodicGCTimerTarget = nullptr;
mIdleGCTimerTarget = nullptr;
mPeriodicGCTimerRunning = false;
mIdleGCTimerRunning = false;
}
bool
WorkerPrivate::InterruptCallback(JSContext* aCx)
{
AssertIsOnWorkerThread();
bool mayContinue = true;
bool scheduledIdleGC = false;
for (;;) {
// Run all control events now.
mayContinue = ProcessAllControlRunnables();
bool maySuspend = mSuspended;
if (maySuspend) {
MutexAutoLock lock(mMutex);
maySuspend = mStatus <= Running;
}
if (!mayContinue || !maySuspend) {
break;
}
// Cancel the periodic GC timer here before suspending. The idle GC timer
// will clean everything up once it runs.
if (!scheduledIdleGC) {
SetGCTimerMode(IdleTimer);
scheduledIdleGC = true;
}
while ((mayContinue = MayContinueRunning())) {
MutexAutoLock lock(mMutex);
if (!mControlQueue.IsEmpty()) {
break;
}
WaitForWorkerEvents(PR_MillisecondsToInterval(RemainingRunTimeMS()));
}
}
if (!mayContinue) {
// We want only uncatchable exceptions here.
NS_ASSERTION(!JS_IsExceptionPending(aCx),
"Should not have an exception set here!");
return false;
}
// Make sure the periodic timer gets turned back on here.
SetGCTimerMode(PeriodicTimer);
return true;
}
nsresult
WorkerPrivate::IsOnCurrentThread(bool* aIsOnCurrentThread)
{
// May be called on any thread!
MOZ_ASSERT(aIsOnCurrentThread);
nsCOMPtr<nsIThread> thread;
{
MutexAutoLock lock(mMutex);
thread = mThread;
}
if (!thread) {
NS_WARNING("Trying to test thread correctness after the worker has "
"released its thread!");
return NS_ERROR_FAILURE;
}
nsresult rv = thread->IsOnCurrentThread(aIsOnCurrentThread);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
void
WorkerPrivate::ScheduleDeletion(WorkerRanOrNot aRanOrNot)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mChildWorkers.IsEmpty());
MOZ_ASSERT(mSyncLoopStack.IsEmpty());
ClearMainEventQueue(aRanOrNot);
#ifdef DEBUG
if (WorkerRan == aRanOrNot) {
nsIThread* currentThread = NS_GetCurrentThread();
MOZ_ASSERT(currentThread);
MOZ_ASSERT(!NS_HasPendingEvents(currentThread));
}
#endif
if (WorkerPrivate* parent = GetParent()) {
nsRefPtr<WorkerFinishedRunnable> runnable =
new WorkerFinishedRunnable(parent, this);
if (!runnable->Dispatch(nullptr)) {
NS_WARNING("Failed to dispatch runnable!");
}
}
else {
nsRefPtr<TopLevelWorkerFinishedRunnable> runnable =
new TopLevelWorkerFinishedRunnable(this);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
NS_WARNING("Failed to dispatch runnable!");
}
}
}
bool
WorkerPrivate::BlockAndCollectRuntimeStats(JS::RuntimeStats* aRtStats,
bool aAnonymize)
{
AssertIsOnMainThread();
mMutex.AssertCurrentThreadOwns();
NS_ASSERTION(aRtStats, "Null RuntimeStats!");
NS_ASSERTION(!mMemoryReporterRunning, "How can we get reentered here?!");
// This signals the worker that it should block itself as soon as possible.
mMemoryReporterRunning = true;
NS_ASSERTION(mJSContext, "This must never be null!");
JSRuntime* rt = JS_GetRuntime(mJSContext);
// If the worker is not already blocked (e.g. waiting for a worker event or
// currently in a ctypes call) then we need to trigger the interrupt
// callback to trap the worker.
if (!mBlockedForMemoryReporter) {
JS_RequestInterruptCallback(rt);
// Wait until the worker actually blocks.
while (!mBlockedForMemoryReporter) {
mMemoryReportCondVar.Wait();
}
}
bool succeeded = false;
// If mMemoryReporter is still set then we can do the actual report. Otherwise
// we're trying to shut down and we don't want to do anything but clean up.
if (mMemoryReporter) {
// Don't hold the lock while doing the actual report.
MutexAutoUnlock unlock(mMutex);
succeeded = JS::CollectRuntimeStats(rt, aRtStats, nullptr, aAnonymize);
}
NS_ASSERTION(mMemoryReporterRunning, "This isn't possible!");
NS_ASSERTION(mBlockedForMemoryReporter, "Somehow we got unblocked!");
// Tell the worker that it can now continue its execution.
mMemoryReporterRunning = false;
// The worker may be waiting so we must notify.
mMemoryReportCondVar.Notify();
return succeeded;
}
void
WorkerPrivate::EnableMemoryReporter()
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!mMemoryReporter);
// No need to lock here since the main thread can't race until we've
// successfully registered the reporter.
mMemoryReporter = new MemoryReporter(this);
if (NS_FAILED(RegisterWeakMemoryReporter(mMemoryReporter))) {
NS_WARNING("Failed to register memory reporter!");
// No need to lock here since a failed registration means our memory
// reporter can't start running. Just clean up.
mMemoryReporter = nullptr;
}
}
void
WorkerPrivate::DisableMemoryReporter()
{
AssertIsOnWorkerThread();
nsRefPtr<MemoryReporter> memoryReporter;
{
MutexAutoLock lock(mMutex);
// There is nothing to do here if the memory reporter was never successfully
// registered.
if (!mMemoryReporter) {
return;
}
// We don't need this set any longer. Swap it out so that we can unregister
// below.
mMemoryReporter.swap(memoryReporter);
// Next disable the memory reporter so that the main thread stops trying to
// signal us.
memoryReporter->Disable();
// If the memory reporter is waiting to start then we need to wait for it to
// finish.
if (mMemoryReporterRunning) {
NS_ASSERTION(!mBlockedForMemoryReporter,
"Can't be blocked in more than one place at the same time!");
mBlockedForMemoryReporter = true;
// Tell the main thread that we're blocked.
mMemoryReportCondVar.Notify();
// Wait for it the main thread to finish. Since we swapped out
// mMemoryReporter above the main thread should respond quickly.
while (mMemoryReporterRunning) {
mMemoryReportCondVar.Wait();
}
NS_ASSERTION(mBlockedForMemoryReporter, "Somehow we got unblocked!");
mBlockedForMemoryReporter = false;
}
}
// Finally unregister the memory reporter.
if (NS_FAILED(UnregisterWeakMemoryReporter(memoryReporter))) {
NS_WARNING("Failed to unregister memory reporter!");
}
}
void
WorkerPrivate::WaitForWorkerEvents(PRIntervalTime aInterval)
{
AssertIsOnWorkerThread();
mMutex.AssertCurrentThreadOwns();
NS_ASSERTION(!mBlockedForMemoryReporter,
"Can't be blocked in more than one place at the same time!");
// Let the main thread know that the worker is blocked and that memory
// reporting may proceed.
mBlockedForMemoryReporter = true;
// The main thread may be waiting so we must notify.
mMemoryReportCondVar.Notify();
// Now wait for an actual worker event.
mCondVar.Wait(aInterval);
// We've gotten some kind of signal but we can't continue until the memory
// reporter has finished. Wait again.
while (mMemoryReporterRunning) {
mMemoryReportCondVar.Wait();
}
NS_ASSERTION(mBlockedForMemoryReporter, "Somehow we got unblocked!");
// No need to notify here as the main thread isn't watching for this state.
mBlockedForMemoryReporter = false;
}
bool
WorkerPrivate::ProcessAllControlRunnablesLocked()
{
AssertIsOnWorkerThread();
mMutex.AssertCurrentThreadOwns();
bool result = true;
for (;;) {
// Block here if the memory reporter is trying to run.
if (mMemoryReporterRunning) {
MOZ_ASSERT(!mBlockedForMemoryReporter);
// Let the main thread know that we've received the block request and
// that memory reporting may proceed.
mBlockedForMemoryReporter = true;
// The main thread is almost certainly waiting so we must notify here.
mMemoryReportCondVar.Notify();
// Wait for the memory report to finish.
while (mMemoryReporterRunning) {
mMemoryReportCondVar.Wait();
}
MOZ_ASSERT(mBlockedForMemoryReporter);
// No need to notify here as the main thread isn't watching for this
// state.
mBlockedForMemoryReporter = false;
}
WorkerControlRunnable* event;
if (!mControlQueue.Pop(event)) {
break;
}
MutexAutoUnlock unlock(mMutex);
MOZ_ASSERT(event);
if (NS_FAILED(static_cast<nsIRunnable*>(event)->Run())) {
result = false;
}
event->Release();
}
return result;
}
void
WorkerPrivate::ClearMainEventQueue(WorkerRanOrNot aRanOrNot)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!mCancelAllPendingRunnables);
mCancelAllPendingRunnables = true;
if (WorkerNeverRan == aRanOrNot) {
for (uint32_t count = mPreStartRunnables.Length(), index = 0;
index < count;
index++) {
nsRefPtr<WorkerRunnable> runnable = mPreStartRunnables[index].forget();
static_cast<nsIRunnable*>(runnable.get())->Run();
}
} else {
nsIThread* currentThread = NS_GetCurrentThread();
MOZ_ASSERT(currentThread);
NS_ProcessPendingEvents(currentThread);
}
MOZ_ASSERT(mCancelAllPendingRunnables);
mCancelAllPendingRunnables = false;
}
uint32_t
WorkerPrivate::RemainingRunTimeMS() const
{
if (mKillTime.IsNull()) {
return UINT32_MAX;
}
TimeDuration runtime = mKillTime - TimeStamp::Now();
double ms = runtime > TimeDuration(0) ? runtime.ToMilliseconds() : 0;
return ms > double(UINT32_MAX) ? UINT32_MAX : uint32_t(ms);
}
bool
WorkerPrivate::SuspendInternal(JSContext* aCx)
{
AssertIsOnWorkerThread();
NS_ASSERTION(!mSuspended, "Already suspended!");
mSuspended = true;
return true;
}
bool
WorkerPrivate::ResumeInternal(JSContext* aCx)
{
AssertIsOnWorkerThread();
NS_ASSERTION(mSuspended, "Not yet suspended!");
mSuspended = false;
return true;
}
void
WorkerPrivate::TraceTimeouts(const TraceCallbacks& aCallbacks,
void* aClosure) const
{
AssertIsOnWorkerThread();
for (uint32_t index = 0; index < mTimeouts.Length(); index++) {
TimeoutInfo* info = mTimeouts[index];
if (info->mTimeoutCallable.isUndefined()) {
continue;
}
aCallbacks.Trace(&info->mTimeoutCallable, "mTimeoutCallable", aClosure);
for (uint32_t index2 = 0; index2 < info->mExtraArgVals.Length(); index2++) {
aCallbacks.Trace(&info->mExtraArgVals[index2], "mExtraArgVals[i]", aClosure);
}
}
}
bool
WorkerPrivate::ModifyBusyCountFromWorker(JSContext* aCx, bool aIncrease)
{
AssertIsOnWorkerThread();
{
MutexAutoLock lock(mMutex);
// If we're in shutdown then the busy count is no longer being considered so
// just return now.
if (mStatus >= Killing) {
return true;
}
}
nsRefPtr<ModifyBusyCountRunnable> runnable =
new ModifyBusyCountRunnable(this, aIncrease);
return runnable->Dispatch(aCx);
}
bool
WorkerPrivate::AddChildWorker(JSContext* aCx, ParentType* aChildWorker)
{
AssertIsOnWorkerThread();
#ifdef DEBUG
{
Status currentStatus;
{
MutexAutoLock lock(mMutex);
currentStatus = mStatus;
}
MOZ_ASSERT(currentStatus == Running);
}
#endif
NS_ASSERTION(!mChildWorkers.Contains(aChildWorker),
"Already know about this one!");
mChildWorkers.AppendElement(aChildWorker);
return mChildWorkers.Length() == 1 ?
ModifyBusyCountFromWorker(aCx, true) :
true;
}
void
WorkerPrivate::RemoveChildWorker(JSContext* aCx, ParentType* aChildWorker)
{
AssertIsOnWorkerThread();
NS_ASSERTION(mChildWorkers.Contains(aChildWorker),
"Didn't know about this one!");
mChildWorkers.RemoveElement(aChildWorker);
if (mChildWorkers.IsEmpty() && !ModifyBusyCountFromWorker(aCx, false)) {
NS_WARNING("Failed to modify busy count!");
}
}
bool
WorkerPrivate::AddFeature(JSContext* aCx, WorkerFeature* aFeature)
{
AssertIsOnWorkerThread();
{
MutexAutoLock lock(mMutex);
if (mStatus >= Canceling) {
return false;
}
}
NS_ASSERTION(!mFeatures.Contains(aFeature), "Already know about this one!");
mFeatures.AppendElement(aFeature);
return mFeatures.Length() == 1 ?
ModifyBusyCountFromWorker(aCx, true) :
true;
}
void
WorkerPrivate::RemoveFeature(JSContext* aCx, WorkerFeature* aFeature)
{
AssertIsOnWorkerThread();
NS_ASSERTION(mFeatures.Contains(aFeature), "Didn't know about this one!");
mFeatures.RemoveElement(aFeature);
if (mFeatures.IsEmpty() && !ModifyBusyCountFromWorker(aCx, false)) {
NS_WARNING("Failed to modify busy count!");
}
}
void
WorkerPrivate::NotifyFeatures(JSContext* aCx, Status aStatus)
{
AssertIsOnWorkerThread();
NS_ASSERTION(aStatus > Running, "Bad status!");
if (aStatus >= Closing) {
CancelAllTimeouts(aCx);
}
nsAutoTArray<WorkerFeature*, 30> features;
features.AppendElements(mFeatures);
for (uint32_t index = 0; index < features.Length(); index++) {
if (!features[index]->Notify(aCx, aStatus)) {
NS_WARNING("Failed to notify feature!");
}
}
nsAutoTArray<ParentType*, 10> children;
children.AppendElements(mChildWorkers);
for (uint32_t index = 0; index < children.Length(); index++) {
if (!children[index]->Notify(aCx, aStatus)) {
NS_WARNING("Failed to notify child worker!");
}
}
}
void
WorkerPrivate::CancelAllTimeouts(JSContext* aCx)
{
AssertIsOnWorkerThread();
if (mTimerRunning) {
NS_ASSERTION(mTimer, "Huh?!");
NS_ASSERTION(!mTimeouts.IsEmpty(), "Huh?!");
if (NS_FAILED(mTimer->Cancel())) {
NS_WARNING("Failed to cancel timer!");
}
for (uint32_t index = 0; index < mTimeouts.Length(); index++) {
mTimeouts[index]->mCanceled = true;
}
if (!RunExpiredTimeouts(aCx)) {
JS_ReportPendingException(aCx);
}
mTimerRunning = false;
}
#ifdef DEBUG
else if (!mRunningExpiredTimeouts) {
NS_ASSERTION(mTimeouts.IsEmpty(), "Huh?!");
}
#endif
mTimer = nullptr;
}
already_AddRefed<nsIEventTarget>
WorkerPrivate::CreateNewSyncLoop()
{
AssertIsOnWorkerThread();
nsCOMPtr<nsIThreadInternal> thread = do_QueryInterface(NS_GetCurrentThread());
MOZ_ASSERT(thread);
nsCOMPtr<nsIEventTarget> realEventTarget;
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(thread->PushEventQueue(
getter_AddRefs(realEventTarget))));
nsRefPtr<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
nsCOMPtr<nsIThreadInternal> thread = do_QueryInterface(mThread);
MOZ_ASSERT(thread);
while (!loopInfo->mCompleted) {
bool normalRunnablesPending = false;
// Don't block with the periodic GC timer running.
if (!NS_HasPendingEvents(thread)) {
SetGCTimerMode(IdleTimer);
}
// Wait for something to do.
{
MutexAutoLock lock(mMutex);
for (;;) {
while (mControlQueue.IsEmpty() &&
!normalRunnablesPending &&
!(normalRunnablesPending = NS_HasPendingEvents(thread))) {
WaitForWorkerEvents();
}
ProcessAllControlRunnablesLocked();
// NB: If we processed a NotifyRunnable, we might have run non-control
// runnables, one of which may have shut down the sync loop.
if (normalRunnablesPending || loopInfo->mCompleted) {
break;
}
}
}
if (normalRunnablesPending) {
// Make sure the periodic timer is running before we continue.
SetGCTimerMode(PeriodicTimer);
MOZ_ALWAYS_TRUE(NS_ProcessNextEvent(thread, false));
// Now *might* be a good time to GC. Let the JS engine make the decision.
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) {
nsCOMPtr<nsIThreadInternal> thread = do_QueryInterface(mThread);
MOZ_ASSERT(thread);
aThread = thread.get();
}
// We're about to delete the loop, stash its event target and result.
SyncLoopInfo* loopInfo = mSyncLoopStack[aLoopIndex];
nsIEventTarget* nestedEventTarget =
loopInfo->mEventTarget->GetWeakNestedEventTarget();
MOZ_ASSERT(nestedEventTarget);
bool result = loopInfo->mResult;
{
// Modifications must be protected by mMutex in DEBUG builds, see comment
// about mSyncLoopStack in WorkerPrivate.h.
#ifdef DEBUG
MutexAutoLock lock(mMutex);
#endif
// This will delete |loopInfo|!
mSyncLoopStack.RemoveElementAt(aLoopIndex);
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(aThread->PopEventQueue(nestedEventTarget)));
return result;
}
void
WorkerPrivate::StopSyncLoop(nsIEventTarget* aSyncLoopTarget, bool aResult)
{
AssertIsOnWorkerThread();
AssertValidSyncLoop(aSyncLoopTarget);
MOZ_ASSERT(!mSyncLoopStack.IsEmpty());
for (uint32_t index = mSyncLoopStack.Length(); index > 0; index--) {
nsAutoPtr<SyncLoopInfo>& loopInfo = mSyncLoopStack[index - 1];
MOZ_ASSERT(loopInfo);
MOZ_ASSERT(loopInfo->mEventTarget);
if (loopInfo->mEventTarget == aSyncLoopTarget) {
// Can't assert |loop->mHasRun| here because dispatch failures can cause
// us to bail out early.
MOZ_ASSERT(!loopInfo->mCompleted);
loopInfo->mResult = aResult;
loopInfo->mCompleted = true;
loopInfo->mEventTarget->Disable();
return;
}
MOZ_ASSERT(!SameCOMIdentity(loopInfo->mEventTarget, aSyncLoopTarget));
}
MOZ_CRASH("Unknown sync loop!");
}
#ifdef DEBUG
void
WorkerPrivate::AssertValidSyncLoop(nsIEventTarget* aSyncLoopTarget)
{
MOZ_ASSERT(aSyncLoopTarget);
EventTarget* workerTarget;
nsresult rv =
aSyncLoopTarget->QueryInterface(kDEBUGWorkerEventTargetIID,
reinterpret_cast<void**>(&workerTarget));
MOZ_ASSERT(NS_SUCCEEDED(rv));
MOZ_ASSERT(workerTarget);
bool valid = false;
{
MutexAutoLock lock(mMutex);
for (uint32_t index = 0; index < mSyncLoopStack.Length(); index++) {
nsAutoPtr<SyncLoopInfo>& loopInfo = mSyncLoopStack[index];
MOZ_ASSERT(loopInfo);
MOZ_ASSERT(loopInfo->mEventTarget);
if (loopInfo->mEventTarget == aSyncLoopTarget) {
valid = true;
break;
}
MOZ_ASSERT(!SameCOMIdentity(loopInfo->mEventTarget, aSyncLoopTarget));
}
}
MOZ_ASSERT(valid);
}
#endif
void
WorkerPrivate::PostMessageToParentInternal(
JSContext* aCx,
JS::Handle<JS::Value> aMessage,
const Optional<Sequence<JS::Value>>& aTransferable,
bool aToMessagePort,
uint64_t aMessagePortSerial,
ErrorResult& aRv)
{
AssertIsOnWorkerThread();
JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
if (aTransferable.WasPassed()) {
const Sequence<JS::Value>& realTransferable = aTransferable.Value();
// The input sequence only comes from the generated bindings code, which
// ensures it is rooted.
JS::HandleValueArray elements =
JS::HandleValueArray::fromMarkedLocation(realTransferable.Length(),
realTransferable.Elements());
JSObject* array = JS_NewArrayObject(aCx, elements);
if (!array) {
aRv = NS_ERROR_OUT_OF_MEMORY;
return;
}
transferable.setObject(*array);
}
JSStructuredCloneCallbacks* callbacks =
IsChromeWorker() ?
&gChromeWorkerStructuredCloneCallbacks :
&gWorkerStructuredCloneCallbacks;
nsTArray<nsCOMPtr<nsISupports>> clonedObjects;
JSAutoStructuredCloneBuffer buffer;
if (!buffer.write(aCx, aMessage, transferable, callbacks, &clonedObjects)) {
aRv = NS_ERROR_DOM_DATA_CLONE_ERR;
return;
}
nsRefPtr<MessageEventRunnable> runnable =
new MessageEventRunnable(this,
WorkerRunnable::ParentThreadUnchangedBusyCount,
Move(buffer), clonedObjects, aToMessagePort,
aMessagePortSerial);
if (!runnable->Dispatch(aCx)) {
aRv = NS_ERROR_FAILURE;
}
}
void
WorkerPrivate::PostMessageToParentMessagePort(
JSContext* aCx,
uint64_t aMessagePortSerial,
JS::Handle<JS::Value> aMessage,
const Optional<Sequence<JS::Value>>& aTransferable,
ErrorResult& aRv)
{
AssertIsOnWorkerThread();
if (!mWorkerPorts.GetWeak(aMessagePortSerial)) {
// This port has been closed from the main thread. There's no point in
// sending this message so just bail.
return;
}
PostMessageToParentInternal(aCx, aMessage, aTransferable, true,
aMessagePortSerial, aRv);
}
bool
WorkerPrivate::NotifyInternal(JSContext* aCx, Status aStatus)
{
AssertIsOnWorkerThread();
NS_ASSERTION(aStatus > Running && aStatus < Dead, "Bad status!");
nsRefPtr<EventTarget> eventTarget;
// Save the old status and set the new status.
Status previousStatus;
{
MutexAutoLock lock(mMutex);
if (mStatus >= aStatus) {
MOZ_ASSERT(!mEventTarget);
return true;
}
previousStatus = mStatus;
mStatus = aStatus;
mEventTarget.swap(eventTarget);
}
// Now that mStatus > Running, no-one can create a new WorkerEventTarget or
// WorkerCrossThreadDispatcher if we don't already have one.
if (eventTarget) {
// Since we'll no longer process events, make sure we no longer allow anyone
// to post them. We have to do this without mMutex held, since our mutex
// must be acquired *after* the WorkerEventTarget's mutex when they're both
// held.
eventTarget->Disable();
eventTarget = nullptr;
}
if (mCrossThreadDispatcher) {
// Since we'll no longer process events, make sure we no longer allow
// anyone to post them. We have to do this without mMutex held, since our
// mutex must be acquired *after* mCrossThreadDispatcher's mutex when
// they're both held.
mCrossThreadDispatcher->Forget();
mCrossThreadDispatcher = nullptr;
}
MOZ_ASSERT(previousStatus != Pending);
MOZ_ASSERT(previousStatus >= Canceling || mKillTime.IsNull());
// Let all our features know the new status.
NotifyFeatures(aCx, aStatus);
// If this is the first time our status has changed then we need to clear the
// main event queue.
if (previousStatus == Running) {
ClearMainEventQueue(WorkerRan);
}
// If we've run the close handler, we don't need to do anything else.
if (mCloseHandlerFinished) {
return true;
}
// If the worker script never ran, or failed to compile, we don't need to do
// anything else, except pretend that we ran the close handler.
if (!JS::CurrentGlobalOrNull(aCx)) {
mCloseHandlerStarted = true;
mCloseHandlerFinished = true;
return true;
}
// If this is the first time our status has changed we also need to schedule
// the close handler unless we're being shut down.
if (previousStatus == Running && aStatus != Killing) {
MOZ_ASSERT(!mCloseHandlerStarted && !mCloseHandlerFinished);
nsRefPtr<CloseEventRunnable> closeRunnable = new CloseEventRunnable(this);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(NS_DispatchToCurrentThread(closeRunnable)));
}
if (aStatus == Closing) {
// Notify parent to stop sending us messages and balance our busy count.
nsRefPtr<CloseRunnable> runnable = new CloseRunnable(this);
if (!runnable->Dispatch(aCx)) {
return false;
}
// Don't abort the script.
return true;
}
if (aStatus == Terminating) {
// Only abort the script if we're not yet running the close handler.
return mCloseHandlerStarted;
}
if (aStatus == Canceling) {
// We need to enforce a timeout on the close handler.
MOZ_ASSERT(previousStatus >= Running && previousStatus <= Terminating);
uint32_t killSeconds = IsChromeWorker() ?
RuntimeService::GetChromeCloseHandlerTimeoutSeconds() :
RuntimeService::GetContentCloseHandlerTimeoutSeconds();
if (killSeconds) {
mKillTime = TimeStamp::Now() + TimeDuration::FromSeconds(killSeconds);
if (!mCloseHandlerFinished && !ScheduleKillCloseEventRunnable(aCx)) {
return false;
}
}
// Only abort the script if we're not yet running the close handler.
return mCloseHandlerStarted;
}
MOZ_ASSERT(aStatus == Killing);
mKillTime = TimeStamp::Now();
if (mCloseHandlerStarted && !mCloseHandlerFinished) {
ScheduleKillCloseEventRunnable(aCx);
}
// Always abort the script.
return false;
}
bool
WorkerPrivate::ScheduleKillCloseEventRunnable(JSContext* aCx)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(!mKillTime.IsNull());
nsRefPtr<KillCloseEventRunnable> killCloseEventRunnable =
new KillCloseEventRunnable(this);
if (!killCloseEventRunnable->SetTimeout(aCx, RemainingRunTimeMS())) {
return false;
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(NS_DispatchToCurrentThread(
killCloseEventRunnable)));
return true;
}
void
WorkerPrivate::ReportError(JSContext* aCx, const char* aMessage,
JSErrorReport* aReport)
{
AssertIsOnWorkerThread();
if (!MayContinueRunning() || mErrorHandlerRecursionCount == 2) {
return;
}
NS_ASSERTION(mErrorHandlerRecursionCount == 0 ||
mErrorHandlerRecursionCount == 1,
"Bad recursion logic!");
JS_ClearPendingException(aCx);
nsString message, filename, line;
uint32_t lineNumber, columnNumber, flags, errorNumber;
if (aReport) {
// ErrorEvent objects don't have a |name| field the way ES |Error| objects
// do. Traditionally (and mostly by accident), the |message| field of
// ErrorEvent has corresponded to |Name: Message| of the original Error
// object. Things have been cleaned up in the JS engine, so now we need to
// format this string explicitly.
JS::Rooted<JSString*> messageStr(aCx,
js::ErrorReportToString(aCx, aReport));
if (messageStr) {
nsAutoJSString autoStr;
if (autoStr.init(aCx, messageStr)) {
message = autoStr;
}
}
filename = NS_ConvertUTF8toUTF16(aReport->filename);
line = aReport->uclinebuf;
lineNumber = aReport->lineno;
columnNumber = aReport->uctokenptr - aReport->uclinebuf;
flags = aReport->flags;
errorNumber = aReport->errorNumber;
}
else {
lineNumber = columnNumber = errorNumber = 0;
flags = nsIScriptError::errorFlag | nsIScriptError::exceptionFlag;
}
if (message.IsEmpty()) {
message = NS_ConvertUTF8toUTF16(aMessage);
}
mErrorHandlerRecursionCount++;
// Don't want to run the scope's error handler if this is a recursive error or
// if there was an error in the close handler or if we ran out of memory.
bool fireAtScope = mErrorHandlerRecursionCount == 1 &&
!mCloseHandlerStarted &&
errorNumber != JSMSG_OUT_OF_MEMORY;
if (!ReportErrorRunnable::ReportError(aCx, this, fireAtScope, nullptr, message,
filename, line, lineNumber,
columnNumber, flags, errorNumber, 0)) {
JS_ReportPendingException(aCx);
}
mErrorHandlerRecursionCount--;
}
int32_t
WorkerPrivate::SetTimeout(JSContext* aCx,
Function* aHandler,
const nsAString& aStringHandler,
int32_t aTimeout,
const Sequence<JS::Value>& aArguments,
bool aIsInterval,
ErrorResult& aRv)
{
AssertIsOnWorkerThread();
const int32_t timerId = mNextTimeoutId++;
Status currentStatus;
{
MutexAutoLock lock(mMutex);
currentStatus = mStatus;
}
// It's a script bug if setTimeout/setInterval are called from a close handler
// so throw an exception.
if (currentStatus == Closing) {
JS_ReportError(aCx, "Cannot schedule timeouts from the close handler!");
}
// If the worker is trying to call setTimeout/setInterval and the parent
// thread has initiated the close process then just silently fail.
if (currentStatus >= Closing) {
aRv.Throw(NS_ERROR_FAILURE);
return 0;
}
nsAutoPtr<TimeoutInfo> newInfo(new TimeoutInfo());
newInfo->mIsInterval = aIsInterval;
newInfo->mId = timerId;
if (MOZ_UNLIKELY(timerId == INT32_MAX)) {
NS_WARNING("Timeout ids overflowed!");
mNextTimeoutId = 1;
}
// Take care of the main argument.
if (aHandler) {
newInfo->mTimeoutCallable = JS::ObjectValue(*aHandler->Callable());
}
else if (!aStringHandler.IsEmpty()) {
newInfo->mTimeoutString = aStringHandler;
}
else {
JS_ReportError(aCx, "Useless %s call (missing quotes around argument?)",
aIsInterval ? "setInterval" : "setTimeout");
return 0;
}
// See if any of the optional arguments were passed.
aTimeout = std::max(0, aTimeout);
newInfo->mInterval = TimeDuration::FromMilliseconds(aTimeout);
uint32_t argc = aArguments.Length();
if (argc && !newInfo->mTimeoutCallable.isUndefined()) {
nsTArray<JS::Heap<JS::Value>> extraArgVals(argc);
for (uint32_t index = 0; index < argc; index++) {
extraArgVals.AppendElement(aArguments[index]);
}
newInfo->mExtraArgVals.SwapElements(extraArgVals);
}
newInfo->mTargetTime = TimeStamp::Now() + newInfo->mInterval;
if (!newInfo->mTimeoutString.IsEmpty()) {
const char* filenameChars;
uint32_t lineNumber;
if (nsJSUtils::GetCallingLocation(aCx, &filenameChars, &lineNumber)) {
newInfo->mFilename = filenameChars;
newInfo->mLineNumber = lineNumber;
}
else {
NS_WARNING("Failed to get calling location!");
}
}
nsAutoPtr<TimeoutInfo>* insertedInfo =
mTimeouts.InsertElementSorted(newInfo.forget(), GetAutoPtrComparator(mTimeouts));
// If the timeout we just made is set to fire next then we need to update the
// timer.
if (insertedInfo == mTimeouts.Elements()) {
nsresult rv;
if (!mTimer) {
nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID, &rv);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return 0;
}
nsRefPtr<TimerRunnable> runnable = new TimerRunnable(this);
nsRefPtr<TimerThreadEventTarget> target =
new TimerThreadEventTarget(this, runnable);
rv = timer->SetTarget(target);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return 0;
}
timer.swap(mTimer);
}
if (!mTimerRunning) {
if (!ModifyBusyCountFromWorker(aCx, true)) {
aRv.Throw(NS_ERROR_FAILURE);
return 0;
}
mTimerRunning = true;
}
if (!RescheduleTimeoutTimer(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return 0;
}
}
return timerId;
}
void
WorkerPrivate::ClearTimeout(int32_t aId)
{
AssertIsOnWorkerThread();
if (!mTimeouts.IsEmpty()) {
NS_ASSERTION(mTimerRunning, "Huh?!");
for (uint32_t index = 0; index < mTimeouts.Length(); index++) {
nsAutoPtr<TimeoutInfo>& info = mTimeouts[index];
if (info->mId == aId) {
info->mCanceled = true;
break;
}
}
}
}
bool
WorkerPrivate::RunExpiredTimeouts(JSContext* aCx)
{
AssertIsOnWorkerThread();
// We may be called recursively (e.g. close() inside a timeout) or we could
// have been canceled while this event was pending, bail out if there is
// nothing to do.
if (mRunningExpiredTimeouts || !mTimerRunning) {
return true;
}
NS_ASSERTION(mTimer, "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 now = std::max(TimeStamp::Now(), mTimeouts[0]->mTargetTime);
nsAutoTArray<TimeoutInfo*, 10> expiredTimeouts;
for (uint32_t index = 0; index < mTimeouts.Length(); index++) {
nsAutoPtr<TimeoutInfo>& info = mTimeouts[index];
if (info->mTargetTime > now) {
break;
}
expiredTimeouts.AppendElement(info);
}
// Guard against recursion.
mRunningExpiredTimeouts = true;
// Run expired timeouts.
for (uint32_t index = 0; index < expiredTimeouts.Length(); index++) {
TimeoutInfo*& info = expiredTimeouts[index];
if (info->mCanceled) {
continue;
}
// Always call JS_ReportPendingException if something fails, and if
// JS_ReportPendingException returns false (i.e. uncatchable exception) then
// break out of the loop.
if (!info->mTimeoutCallable.isUndefined()) {
JS::Rooted<JS::Value> rval(aCx);
JS::HandleValueArray args =
JS::HandleValueArray::fromMarkedLocation(info->mExtraArgVals.Length(),
info->mExtraArgVals.Elements()->address());
JS::Rooted<JS::Value> callable(aCx, info->mTimeoutCallable);
if (!JS_CallFunctionValue(aCx, global, callable, args, &rval) &&
!JS_ReportPendingException(aCx)) {
retval = false;
break;
}
}
else {
nsString expression = info->mTimeoutString;
JS::CompileOptions options(aCx);
options.setFileAndLine(info->mFilename.get(), info->mLineNumber)
.setNoScriptRval(true);
if ((expression.IsEmpty() ||
!JS::Evaluate(aCx, global, options, expression.get(), expression.Length())) &&
!JS_ReportPendingException(aCx)) {
retval = false;
break;
}
}
NS_ASSERTION(mRunningExpiredTimeouts, "Someone changed this!");
}
// No longer possible to be called recursively.
mRunningExpiredTimeouts = false;
// Now remove canceled and expired timeouts from the main list.
// NB: The timeouts present in expiredTimeouts must have the same order
// with respect to each other in mTimeouts. That is, mTimeouts is just
// expiredTimeouts with extra elements inserted. There may be unexpired
// timeouts that have been inserted between the expired timeouts if the
// timeout event handler called setTimeout/setInterval.
for (uint32_t index = 0, expiredTimeoutIndex = 0,
expiredTimeoutLength = expiredTimeouts.Length();
index < mTimeouts.Length(); ) {
nsAutoPtr<TimeoutInfo>& info = mTimeouts[index];
if ((expiredTimeoutIndex < expiredTimeoutLength &&
info == expiredTimeouts[expiredTimeoutIndex] &&
++expiredTimeoutIndex) ||
info->mCanceled) {
if (info->mIsInterval && !info->mCanceled) {
// Reschedule intervals.
info->mTargetTime = info->mTargetTime + info->mInterval;
// Don't resort the list here, we'll do that at the end.
++index;
}
else {
mTimeouts.RemoveElement(info);
}
}
else {
// If info did not match the current entry in expiredTimeouts, it
// shouldn't be there at all.
NS_ASSERTION(!expiredTimeouts.Contains(info),
"Our timeouts are out of order!");
++index;
}
}
mTimeouts.Sort(comparator);
// Either signal the parent that we're no longer using timeouts or reschedule
// the timer.
if (mTimeouts.IsEmpty()) {
if (!ModifyBusyCountFromWorker(aCx, false)) {
retval = false;
}
mTimerRunning = false;
}
else if (retval && !RescheduleTimeoutTimer(aCx)) {
retval = false;
}
return retval;
}
bool
WorkerPrivate::RescheduleTimeoutTimer(JSContext* aCx)
{
AssertIsOnWorkerThread();
NS_ASSERTION(!mTimeouts.IsEmpty(), "Should have some timeouts!");
NS_ASSERTION(mTimer, "Should have a timer!");
double delta =
(mTimeouts[0]->mTargetTime - TimeStamp::Now()).ToMilliseconds();
uint32_t delay = delta > 0 ? std::min(delta, double(UINT32_MAX)) : 0;
nsresult rv = mTimer->InitWithFuncCallback(DummyCallback, nullptr, delay,
nsITimer::TYPE_ONE_SHOT);
if (NS_FAILED(rv)) {
JS_ReportError(aCx, "Failed to start timer!");
return false;
}
return true;
}
void
WorkerPrivate::UpdateRuntimeOptionsInternal(
JSContext* aCx,
const JS::RuntimeOptions& aRuntimeOptions)
{
AssertIsOnWorkerThread();
JS::RuntimeOptionsRef(aCx) = aRuntimeOptions;
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateRuntimeOptions(aCx, aRuntimeOptions);
}
}
void
WorkerPrivate::UpdateLanguagesInternal(JSContext* aCx,
const nsTArray<nsString>& aLanguages)
{
WorkerGlobalScope* globalScope = GlobalScope();
if (globalScope) {
nsRefPtr<WorkerNavigator> nav = globalScope->GetExistingNavigator();
if (nav) {
nav->SetLanguages(aLanguages);
}
}
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateLanguages(aCx, aLanguages);
}
}
void
WorkerPrivate::UpdatePreferenceInternal(JSContext* aCx, WorkerPreference aPref, bool aValue)
{
AssertIsOnWorkerThread();
MOZ_ASSERT(aPref >= 0 && aPref < WORKERPREF_COUNT);
mPreferences[aPref] = aValue;
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdatePreference(aCx, aPref, aValue);
}
}
void
WorkerPrivate::UpdateJSWorkerMemoryParameterInternal(JSContext* aCx,
JSGCParamKey aKey,
uint32_t aValue)
{
AssertIsOnWorkerThread();
// XXX aValue might be 0 here (telling us to unset a previous value for child
// workers). Calling JS_SetGCParameter with a value of 0 isn't actually
// supported though. We really need some way to revert to a default value
// here.
if (aValue) {
JS_SetGCParameter(JS_GetRuntime(aCx), aKey, aValue);
}
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateJSWorkerMemoryParameter(aCx, aKey, aValue);
}
}
#ifdef JS_GC_ZEAL
void
WorkerPrivate::UpdateGCZealInternal(JSContext* aCx, uint8_t aGCZeal,
uint32_t aFrequency)
{
AssertIsOnWorkerThread();
JS_SetGCZeal(aCx, aGCZeal, aFrequency);
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateGCZeal(aCx, aGCZeal, aFrequency);
}
}
#endif
void
WorkerPrivate::GarbageCollectInternal(JSContext* aCx, bool aShrinking,
bool aCollectChildren)
{
AssertIsOnWorkerThread();
if (!JS::CurrentGlobalOrNull(aCx)) {
// We haven't compiled anything yet. Just bail out.
return;
}
if (aShrinking || aCollectChildren) {
JSRuntime* rt = JS_GetRuntime(aCx);
JS::PrepareForFullGC(rt);
if (aShrinking) {
JS::ShrinkingGC(rt, JS::gcreason::DOM_WORKER);
if (!aCollectChildren) {
LOG(("Worker %p collected idle garbage\n", this));
}
}
else {
JS::GCForReason(rt, JS::gcreason::DOM_WORKER);
LOG(("Worker %p collected garbage\n", this));
}
}
else {
JS_MaybeGC(aCx);
LOG(("Worker %p collected periodic garbage\n", this));
}
if (aCollectChildren) {
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->GarbageCollect(aCx, aShrinking);
}
}
}
void
WorkerPrivate::CycleCollectInternal(JSContext* aCx, bool aCollectChildren)
{
AssertIsOnWorkerThread();
nsCycleCollector_collect(nullptr);
if (aCollectChildren) {
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->CycleCollect(aCx, /* dummy = */ false);
}
}
}
void
WorkerPrivate::SetThread(nsIThread* aThread)
{
#ifdef DEBUG
if (aThread) {
bool isOnCurrentThread;
MOZ_ASSERT(NS_SUCCEEDED(aThread->IsOnCurrentThread(&isOnCurrentThread)));
MOZ_ASSERT(isOnCurrentThread);
MOZ_ASSERT(!mPRThread);
mPRThread = PRThreadFromThread(aThread);
MOZ_ASSERT(mPRThread);
}
else {
MOZ_ASSERT(mPRThread);
}
#endif
nsCOMPtr<nsIThread> 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;
if (!mPreStartRunnables.IsEmpty()) {
for (uint32_t index = 0; index < mPreStartRunnables.Length(); index++) {
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mThread->Dispatch(
mPreStartRunnables[index],
NS_DISPATCH_NORMAL)));
}
mPreStartRunnables.Clear();
}
}
else {
MOZ_ASSERT(mThread);
mThread.swap(doomedThread);
}
}
}
WorkerCrossThreadDispatcher*
WorkerPrivate::GetCrossThreadDispatcher()
{
MutexAutoLock lock(mMutex);
if (!mCrossThreadDispatcher && mStatus <= Running) {
mCrossThreadDispatcher = new WorkerCrossThreadDispatcher(this);
}
return mCrossThreadDispatcher;
}
void
WorkerPrivate::BeginCTypesCall()
{
AssertIsOnWorkerThread();
// Don't try to GC while we're blocked in a ctypes call.
SetGCTimerMode(NoTimer);
MutexAutoLock lock(mMutex);
NS_ASSERTION(!mBlockedForMemoryReporter,
"Can't be blocked in more than one place at the same time!");
// Let the main thread know that the worker is effectively blocked while in
// this ctypes call. It isn't technically true (obviously the call could do
// non-blocking things), but we're assuming that ctypes can't call back into
// JSAPI here and therefore any work the ctypes call does will not alter the
// data structures of this JS runtime.
mBlockedForMemoryReporter = true;
// The main thread may be waiting on us so it must be notified.
mMemoryReportCondVar.Notify();
}
void
WorkerPrivate::EndCTypesCall()
{
AssertIsOnWorkerThread();
{
MutexAutoLock lock(mMutex);
NS_ASSERTION(mBlockedForMemoryReporter, "Somehow we got unblocked!");
// Don't continue until the memory reporter has finished.
while (mMemoryReporterRunning) {
mMemoryReportCondVar.Wait();
}
// No need to notify the main thread here as it shouldn't be waiting to see
// this state.
mBlockedForMemoryReporter = false;
}
// Make sure the periodic timer is running before we start running JS again.
SetGCTimerMode(PeriodicTimer);
}
bool
WorkerPrivate::ConnectMessagePort(JSContext* aCx, uint64_t aMessagePortSerial)
{
AssertIsOnWorkerThread();
NS_ASSERTION(!mWorkerPorts.GetWeak(aMessagePortSerial),
"Already have this port registered!");
WorkerGlobalScope* globalScope = GlobalScope();
JS::Rooted<JSObject*> jsGlobal(aCx, globalScope->GetWrapper());
MOZ_ASSERT(jsGlobal);
nsRefPtr<MessagePort> port = new MessagePort(this, aMessagePortSerial);
GlobalObject globalObject(aCx, jsGlobal);
if (globalObject.Failed()) {
return false;
}
RootedDictionary<MessageEventInit> init(aCx);
init.mBubbles = false;
init.mCancelable = false;
init.mSource.SetValue().SetAsMessagePort() = port;
ErrorResult rv;
nsRefPtr<MessageEvent> event =
MessageEvent::Constructor(globalObject,
NS_LITERAL_STRING("connect"), init, rv);
event->SetTrusted(true);
nsTArray<nsRefPtr<MessagePortBase>> ports;
ports.AppendElement(port);
nsRefPtr<MessagePortList> portList =
new MessagePortList(static_cast<nsIDOMEventTarget*>(globalScope), ports);
event->SetPorts(portList);
mWorkerPorts.Put(aMessagePortSerial, port);
nsCOMPtr<nsIDOMEvent> domEvent = do_QueryObject(event);
nsEventStatus dummy = nsEventStatus_eIgnore;
globalScope->DispatchDOMEvent(nullptr, domEvent, nullptr, &dummy);
return true;
}
void
WorkerPrivate::DisconnectMessagePort(uint64_t aMessagePortSerial)
{
AssertIsOnWorkerThread();
mWorkerPorts.Remove(aMessagePortSerial);
}
workers::MessagePort*
WorkerPrivate::GetMessagePort(uint64_t aMessagePortSerial)
{
AssertIsOnWorkerThread();
nsRefPtr<MessagePort> port;
if (mWorkerPorts.Get(aMessagePortSerial, getter_AddRefs(port))) {
return port;
}
return nullptr;
}
JSObject*
WorkerPrivate::CreateGlobalScope(JSContext* aCx)
{
AssertIsOnWorkerThread();
nsRefPtr<WorkerGlobalScope> globalScope;
if (IsSharedWorker()) {
globalScope = new SharedWorkerGlobalScope(this, SharedWorkerName());
} else if (IsServiceWorker()) {
globalScope = new ServiceWorkerGlobalScope(this, SharedWorkerName());
} else {
globalScope = new DedicatedWorkerGlobalScope(this);
}
JS::Rooted<JSObject*> global(aCx, globalScope->WrapGlobalObject(aCx));
NS_ENSURE_TRUE(global, nullptr);
JSAutoCompartment ac(aCx, global);
if (!RegisterBindings(aCx, global)) {
return nullptr;
}
mScope = globalScope.forget();
JS_FireOnNewGlobalObject(aCx, global);
return global;
}
#ifdef DEBUG
void
WorkerPrivate::AssertIsOnWorkerThread() const
{
// This is much more complicated than it needs to be but we can't use mThread
// because it must be protected by mMutex and sometimes this method is called
// when mMutex is already locked. This method should always work.
MOZ_ASSERT(mPRThread,
"AssertIsOnWorkerThread() called before a thread was assigned!");
MOZ_ASSERT(nsThreadManager::get());
nsCOMPtr<nsIThread> thread;
nsresult rv =
nsThreadManager::get()->GetThreadFromPRThread(mPRThread,
getter_AddRefs(thread));
MOZ_ASSERT(NS_SUCCEEDED(rv));
MOZ_ASSERT(thread);
bool current;
rv = thread->IsOnCurrentThread(&current);
MOZ_ASSERT(NS_SUCCEEDED(rv));
MOZ_ASSERT(current, "Wrong thread!");
}
#endif // DEBUG
NS_IMPL_ISUPPORTS_INHERITED0(ExternalRunnableWrapper, WorkerRunnable)
template <class Derived>
NS_IMPL_ADDREF(WorkerPrivateParent<Derived>::EventTarget)
template <class Derived>
NS_IMPL_RELEASE(WorkerPrivateParent<Derived>::EventTarget)
template <class Derived>
NS_INTERFACE_MAP_BEGIN(WorkerPrivateParent<Derived>::EventTarget)
NS_INTERFACE_MAP_ENTRY(nsIEventTarget)
NS_INTERFACE_MAP_ENTRY(nsISupports)
#ifdef DEBUG
// kDEBUGWorkerEventTargetIID is special in that it does not AddRef its
// result.
if (aIID.Equals(kDEBUGWorkerEventTargetIID)) {
*aInstancePtr = this;
return NS_OK;
}
else
#endif
NS_INTERFACE_MAP_END
template <class Derived>
NS_IMETHODIMP
WorkerPrivateParent<Derived>::
EventTarget::Dispatch(nsIRunnable* aRunnable, uint32_t aFlags)
{
// May be called on any thread!
// Workers only support asynchronous dispatch for now.
if (NS_WARN_IF(aFlags != NS_DISPATCH_NORMAL)) {
return NS_ERROR_UNEXPECTED;
}
nsRefPtr<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 (aRunnable) {
workerRunnable = mWorkerPrivate->MaybeWrapAsWorkerRunnable(aRunnable);
}
nsresult rv =
mWorkerPrivate->DispatchPrivate(workerRunnable, mNestedEventTarget);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
template <class Derived>
NS_IMETHODIMP
WorkerPrivateParent<Derived>::
EventTarget::IsOnCurrentThread(bool* aIsOnCurrentThread)
{
// May be called on any thread!
MOZ_ASSERT(aIsOnCurrentThread);
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
NS_WARNING("A worker's event target was used after the worker has !");
return NS_ERROR_UNEXPECTED;
}
nsresult rv = mWorkerPrivate->IsOnCurrentThread(aIsOnCurrentThread);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
BEGIN_WORKERS_NAMESPACE
WorkerCrossThreadDispatcher*
GetWorkerCrossThreadDispatcher(JSContext* aCx, JS::Value aWorker)
{
if (!aWorker.isObject()) {
return nullptr;
}
WorkerPrivate* w = nullptr;
UNWRAP_OBJECT(Worker, &aWorker.toObject(), w);
MOZ_ASSERT(w);
return w->GetCrossThreadDispatcher();
}
JSStructuredCloneCallbacks*
WorkerStructuredCloneCallbacks(bool aMainRuntime)
{
return aMainRuntime ?
&gMainThreadWorkerStructuredCloneCallbacks :
&gWorkerStructuredCloneCallbacks;
}
JSStructuredCloneCallbacks*
ChromeWorkerStructuredCloneCallbacks(bool aMainRuntime)
{
return aMainRuntime ?
&gMainThreadChromeWorkerStructuredCloneCallbacks :
&gChromeWorkerStructuredCloneCallbacks;
}
// Force instantiation.
template class WorkerPrivateParent<WorkerPrivate>;
END_WORKERS_NAMESPACE
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