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gecko-dev/dom/workers/WorkerPrivate.cpp

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/* -*- 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 "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/ContentEvents.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/MessageEventBinding.h"
#include "mozilla/dom/MessagePortList.h"
#include "mozilla/dom/WorkerBinding.h"
#include "mozilla/Preferences.h"
#include "nsAlgorithm.h"
#include "nsContentUtils.h"
#include "nsCxPusher.h"
#include "nsError.h"
#include "nsEventDispatcher.h"
#include "nsDOMMessageEvent.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 "Principal.h"
#include "RuntimeService.h"
#include "ScriptLoader.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;
JSContext* mJSContext;
bool mDefaultAction;
WindowAction(nsPIDOMWindow* aWindow, JSContext* aJSContext)
: mWindow(aWindow), mJSContext(aJSContext), mDefaultAction(true)
{
MOZ_ASSERT(aJSContext);
}
WindowAction(nsPIDOMWindow* aWindow)
: mWindow(aWindow), mJSContext(nullptr), 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)
{
// See if object is a nsIDOMFile pointer.
if (aTag == DOMWORKER_SCTAG_FILE) {
JS_ASSERT(!aData);
nsIDOMFile* file;
if (JS_ReadBytes(aReader, &file, sizeof(file))) {
JS_ASSERT(file);
#ifdef DEBUG
{
// File should not be mutable.
nsCOMPtr<nsIMutable> mutableFile = do_QueryInterface(file);
bool isMutable;
NS_ASSERTION(NS_SUCCEEDED(mutableFile->GetMutable(&isMutable)) &&
!isMutable,
"Only immutable file should be passed to worker");
}
#endif
// nsIDOMFiles should be threadsafe, thus we will use the same instance
// in the worker.
JSObject* jsFile = file::CreateFile(aCx, file);
return jsFile;
}
}
// See if object is a nsIDOMBlob pointer.
else if (aTag == DOMWORKER_SCTAG_BLOB) {
JS_ASSERT(!aData);
nsIDOMBlob* blob;
if (JS_ReadBytes(aReader, &blob, sizeof(blob))) {
JS_ASSERT(blob);
#ifdef DEBUG
{
// Blob should not be mutable.
nsCOMPtr<nsIMutable> mutableBlob = do_QueryInterface(blob);
bool isMutable;
NS_ASSERTION(NS_SUCCEEDED(mutableBlob->GetMutable(&isMutable)) &&
!isMutable,
"Only immutable blob should be passed to worker");
}
#endif
// nsIDOMBlob should be threadsafe, thus we will use the same instance
// in the worker.
JSObject* jsBlob = file::CreateBlob(aCx, blob);
return jsBlob;
}
}
// See if the object is an ImageData.
else if (aTag == SCTAG_DOM_IMAGEDATA) {
JS_ASSERT(!aData);
// Read the information out of the stream.
uint32_t width, height;
JS::Rooted<JS::Value> dataArray(aCx);
if (!JS_ReadUint32Pair(aReader, &width, &height) ||
!JS_ReadTypedArray(aReader, dataArray.address()))
{
return nullptr;
}
MOZ_ASSERT(dataArray.isObject());
// Construct the ImageData.
nsRefPtr<ImageData> imageData = new ImageData(width, height,
dataArray.toObject());
// Wrap it in a JS::Value.
JS::Rooted<JSObject*> global(aCx, JS::CurrentGlobalOrNull(aCx));
if (!global) {
return nullptr;
}
return imageData->WrapObject(aCx, global);
}
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) {
if (JS_WriteUint32Pair(aWriter, DOMWORKER_SCTAG_FILE, 0) &&
JS_WriteBytes(aWriter, &file, sizeof(file))) {
clonedObjects->AppendElement(file);
return true;
}
}
}
// See if this is a Blob object.
{
nsIDOMBlob* blob = file::GetDOMBlobFromJSObject(aObj);
if (blob) {
nsCOMPtr<nsIMutable> mutableBlob = do_QueryInterface(blob);
if (mutableBlob && NS_SUCCEEDED(mutableBlob->SetMutable(false)) &&
JS_WriteUint32Pair(aWriter, DOMWORKER_SCTAG_BLOB, 0) &&
JS_WriteBytes(aWriter, &blob, sizeof(blob))) {
clonedObjects->AppendElement(blob);
return true;
}
}
}
// See if this is an ImageData object.
{
ImageData* imageData = nullptr;
if (NS_SUCCEEDED(UNWRAP_OBJECT(ImageData, aObj, imageData))) {
// Prepare the ImageData internals.
uint32_t width = imageData->Width();
uint32_t height = imageData->Height();
JS::Rooted<JSObject*> dataArray(aCx, imageData->GetDataObject());
// Write the internals to the stream.
JSAutoCompartment ac(aCx, dataArray);
return JS_WriteUint32Pair(aWriter, SCTAG_DOM_IMAGEDATA, 0) &&
JS_WriteUint32Pair(aWriter, width, height) &&
JS_WriteTypedArray(aWriter, JS::ObjectValue(*dataArray));
}
}
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
};
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) {
JS_ASSERT(!aData);
nsIDOMFile* file;
if (JS_ReadBytes(aReader, &file, sizeof(file))) {
JS_ASSERT(file);
#ifdef DEBUG
{
// File should not be mutable.
nsCOMPtr<nsIMutable> mutableFile = do_QueryInterface(file);
bool isMutable;
NS_ASSERTION(NS_SUCCEEDED(mutableFile->GetMutable(&isMutable)) &&
!isMutable,
"Only immutable file should be passed to worker");
}
#endif
// nsIDOMFiles should be threadsafe, thus we will use the same instance
// on the main thread.
JS::Rooted<JS::Value> wrappedFile(aCx);
JS::Rooted<JSObject*> global(aCx, JS::CurrentGlobalOrNull(aCx));
nsresult rv = nsContentUtils::WrapNative(aCx, global, 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) {
JS_ASSERT(!aData);
nsIDOMBlob* blob;
if (JS_ReadBytes(aReader, &blob, sizeof(blob))) {
JS_ASSERT(blob);
#ifdef DEBUG
{
// Blob should not be mutable.
nsCOMPtr<nsIMutable> mutableBlob = do_QueryInterface(blob);
bool isMutable;
NS_ASSERTION(NS_SUCCEEDED(mutableBlob->GetMutable(&isMutable)) &&
!isMutable,
"Only immutable blob should be passed to worker");
}
#endif
// nsIDOMBlobs should be threadsafe, thus we will use the same instance
// on the main thread.
JS::Rooted<JS::Value> wrappedBlob(aCx);
JS::Rooted<JSObject*> global(aCx, JS::CurrentGlobalOrNull(aCx));
nsresult rv = nsContentUtils::WrapNative(aCx, global, 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?!");
nsISupports* ccISupports = nullptr;
wrappedObject->QueryInterface(NS_GET_IID(nsCycleCollectionISupports),
reinterpret_cast<void**>(&ccISupports));
if (ccISupports) {
NS_WARNING("Cycle collected objects are not supported!");
}
else {
// See if the wrapped native is a nsIDOMFile.
nsCOMPtr<nsIDOMFile> file = do_QueryInterface(wrappedObject);
if (file) {
nsCOMPtr<nsIMutable> mutableFile = do_QueryInterface(file);
if (mutableFile && NS_SUCCEEDED(mutableFile->SetMutable(false))) {
nsIDOMFile* filePtr = file;
if (JS_WriteUint32Pair(aWriter, DOMWORKER_SCTAG_FILE, 0) &&
JS_WriteBytes(aWriter, &filePtr, sizeof(filePtr))) {
clonedObjects->AppendElement(file);
return true;
}
}
}
// See if the wrapped native is a nsIDOMBlob.
nsCOMPtr<nsIDOMBlob> blob = do_QueryInterface(wrappedObject);
if (blob) {
nsCOMPtr<nsIMutable> mutableBlob = do_QueryInterface(blob);
if (mutableBlob && NS_SUCCEEDED(mutableBlob->SetMutable(false))) {
nsIDOMBlob* blobPtr = blob;
if (JS_WriteUint32Pair(aWriter, DOMWORKER_SCTAG_BLOB, 0) &&
JS_WriteBytes(aWriter, &blobPtr, sizeof(blobPtr))) {
clonedObjects->AppendElement(blob);
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
};
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
};
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
};
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_DISPATCH_NORMAL))) {
NS_WARNING("Failed to dispatch, going to leak!");
}
mFinishedWorker->Finish(aCx);
RuntimeService* runtime = RuntimeService::GetService();
NS_ASSERTION(runtime, "This should never be null!");
runtime->UnregisterWorker(aCx, mFinishedWorker);
mFinishedWorker->Release();
return true;
}
};
class TopLevelWorkerFinishedRunnable MOZ_FINAL : public nsRunnable
{
WorkerPrivate* mFinishedWorker;
public:
TopLevelWorkerFinishedRunnable(WorkerPrivate* aFinishedWorker)
: mFinishedWorker(aFinishedWorker)
{
aFinishedWorker->AssertIsOnWorkerThread();
}
NS_DECL_ISUPPORTS_INHERITED
private:
NS_IMETHOD
Run() MOZ_OVERRIDE
{
AssertIsOnMainThread();
AutoSafeJSContext cx;
JSAutoRequest ar(cx);
mFinishedWorker->Finish(cx);
RuntimeService* runtime = RuntimeService::GetService();
NS_ASSERTION(runtime, "This should never be null!");
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->Release();
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:
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);
return scriptloader::LoadWorkerScript(aCx);
}
};
class CloseEventRunnable MOZ_FINAL : public WorkerRunnable
{
public:
CloseEventRunnable(WorkerPrivate* aWorkerPrivate)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
{ }
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
MOZ_ASSUME_UNREACHABLE("Don't call Dispatch() on CloseEventRunnable!");
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
MOZ_ASSUME_UNREACHABLE("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),
mMessagePortSerial(aMessagePortSerial), mToMessagePort(aToMessagePort)
{
mBuffer.swap(aData);
mClonedObjects.SwapElements(aClonedObjects);
}
bool
DispatchDOMEvent(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
nsDOMEventTargetHelper* 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<nsDOMMessageEvent> event =
new nsDOMMessageEvent(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,
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 == 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:
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:
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:
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.
if (aTarget) {
ErrorEventInit init;
init.mMessage = aMessage;
init.mFilename = aFilename;
init.mLineno = aLineNumber;
init.mCancelable = true;
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());
// Icky, we have to fire an InternalScriptErrorEvent...
MOZ_ASSERT(!NS_IsMainThread());
InternalScriptErrorEvent event(true, NS_USER_DEFINED_EVENT);
event.lineNr = aLineNumber;
event.errorMsg = aMessage.get();
event.fileName = aFilename.get();
event.typeString = NS_LITERAL_STRING("error");
nsIDOMEventTarget* target = static_cast<nsIDOMEventTarget*>(globalTarget);
if (NS_FAILED(nsEventDispatcher::Dispatch(target, nullptr, &event,
nullptr, &status))) {
NS_WARNING("Failed to dispatch worker thread error event!");
status = nsEventStatus_eIgnore;
}
}
else if ((sgo = nsJSUtils::GetStaticScriptGlobal(target))) {
// Icky, we have to fire an InternalScriptErrorEvent...
MOZ_ASSERT(NS_IsMainThread());
InternalScriptErrorEvent event(true, NS_LOAD_ERROR);
event.lineNr = aLineNumber;
event.errorMsg = aMessage.get();
event.fileName = aFilename.get();
if (NS_FAILED(sgo->HandleScriptError(&event, &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
{
// Don't fire this event if the JS object has been disconnected from the
// private object.
if (!aWorkerPrivate->IsAcceptingEvents()) {
return true;
}
JS::Rooted<JSObject*> target(aCx, aWorkerPrivate->GetWrapper());
uint64_t innerWindowId;
bool fireAtScope = true;
WorkerPrivate* parent = aWorkerPrivate->GetParent();
if (parent) {
innerWindowId = 0;
}
else {
AssertIsOnMainThread();
if (aWorkerPrivate->IsSuspended()) {
aWorkerPrivate->QueueRunnable(this);
return true;
}
if (aWorkerPrivate->IsSharedWorker()) {
aWorkerPrivate->BroadcastErrorToSharedWorkers(aCx, mMessage, mFilename,
mLine, mLineNumber,
mColumnNumber, mFlags);
return true;
}
aWorkerPrivate->AssertInnerWindowIsCorrect();
innerWindowId = aWorkerPrivate->GetInnerWindowId();
}
return ReportError(aCx, parent, fireAtScope, aWorkerPrivate, mMessage,
mFilename, mLine, mLineNumber, mColumnNumber, mFlags,
mErrorNumber, innerWindowId);
}
};
class TimerRunnable MOZ_FINAL : public WorkerRunnable
{
public:
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
{
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:
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:
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_ASSUME_UNREACHABLE("Don't call Dispatch() on KillCloseEventRunnable!");
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
MOZ_ASSUME_UNREACHABLE("Don't call Dispatch() on KillCloseEventRunnable!");
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
if (mTimer) {
mTimer->Cancel();
mTimer = nullptr;
}
return true;
}
};
class UpdateJSContextOptionsRunnable MOZ_FINAL : public WorkerControlRunnable
{
JS::ContextOptions mContentOptions;
JS::ContextOptions mChromeOptions;
public:
UpdateJSContextOptionsRunnable(WorkerPrivate* aWorkerPrivate,
const JS::ContextOptions& aContentOptions,
const JS::ContextOptions& aChromeOptions)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mContentOptions(aContentOptions), mChromeOptions(aChromeOptions)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
aWorkerPrivate->UpdateJSContextOptionsInternal(aCx, mContentOptions,
mChromeOptions);
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 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 UpdateJITHardeningRunnable MOZ_FINAL : public WorkerControlRunnable
{
bool mJITHardening;
public:
UpdateJITHardeningRunnable(WorkerPrivate* aWorkerPrivate, bool aJITHardening)
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
mJITHardening(aJITHardening)
{ }
private:
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
aWorkerPrivate->UpdateJITHardeningInternal(aCx, mJITHardening);
return true;
}
};
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 WorkerJSRuntimeStats : public JS::RuntimeStats
{
const nsACString& mRtPath;
public:
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/?!/");
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_ISUPPORTS1(TimerThreadEventTarget, nsIEventTarget)
template <class Derived>
class WorkerPrivateParent<Derived>::SynchronizeAndResumeRunnable MOZ_FINAL
: public nsRunnable
{
friend class nsRevocableEventPtr<SynchronizeAndResumeRunnable>;
WorkerPrivate* mWorkerPrivate;
nsCOMPtr<nsPIDOMWindow> mWindow;
nsCOMPtr<nsIScriptContext> mScriptContext;
public:
SynchronizeAndResumeRunnable(WorkerPrivate* aWorkerPrivate,
nsPIDOMWindow* aWindow,
nsIScriptContext* aScriptContext)
: mWorkerPrivate(aWorkerPrivate), mWindow(aWindow),
mScriptContext(aScriptContext)
{
AssertIsOnMainThread();
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aWindow);
MOZ_ASSERT(!aWorkerPrivate->GetParent());
}
private:
~SynchronizeAndResumeRunnable()
{ }
NS_IMETHOD
Run() MOZ_OVERRIDE
{
AssertIsOnMainThread();
if (mWorkerPrivate) {
AutoPushJSContext cx(mScriptContext ?
mScriptContext->GetNativeContext() :
nsContentUtils::GetSafeJSContext());
if (!mWorkerPrivate->Resume(cx, mWindow)) {
JS_ReportPendingException(cx);
}
}
return NS_OK;
}
void
Revoke()
{
AssertIsOnMainThread();
MOZ_ASSERT(mWorkerPrivate);
MOZ_ASSERT(mWindow);
mWorkerPrivate = nullptr;
mWindow = nullptr;
mScriptContext = 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:
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;
nsCString mRtPath;
bool mAlreadyMappedToAddon;
public:
MemoryReporter(WorkerPrivate* aWorkerPrivate)
: mMutex(aWorkerPrivate->mMutex), mWorkerPrivate(aWorkerPrivate),
mAlreadyMappedToAddon(false)
{
aWorkerPrivate->AssertIsOnWorkerThread();
nsCString escapedDomain(aWorkerPrivate->Domain());
escapedDomain.ReplaceChar('/', '\\');
NS_ConvertUTF16toUTF8 escapedURL(aWorkerPrivate->ScriptURL());
escapedURL.ReplaceChar('/', '\\');
nsAutoCString addressString;
addressString.AppendPrintf("0x%p", static_cast<void*>(aWorkerPrivate));
mRtPath = NS_LITERAL_CSTRING("explicit/workers/workers(") +
escapedDomain + NS_LITERAL_CSTRING(")/worker(") +
escapedURL + NS_LITERAL_CSTRING(", ") + addressString +
NS_LITERAL_CSTRING(")/");
}
NS_IMETHOD
CollectReports(nsIMemoryReporterCallback* aCallback,
nsISupports* aClosure)
{
AssertIsOnMainThread();
// Assumes that WorkerJSRuntimeStats will hold a reference to mRtPath,
// and not a copy, as TryToMapAddon() may later modify the string again.
WorkerJSRuntimeStats rtStats(mRtPath);
{
MutexAutoLock lock(mMutex);
TryToMapAddon();
if (!mWorkerPrivate ||
!mWorkerPrivate->BlockAndCollectRuntimeStats(&rtStats)) {
// Returning NS_OK here will effectively report 0 memory.
return NS_OK;
}
}
return xpc::ReportJSRuntimeExplicitTreeStats(rtStats, mRtPath,
aCallback, aClosure);
}
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()
{
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 += "/";
mRtPath.Insert(addonId, explicitLength);
}
};
NS_IMPL_ISUPPORTS1(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 nsAString& 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), mRooted(false), mParentSuspended(false),
mIsChromeWorker(aIsChromeWorker), mMainThreadObjectsForgotten(false),
mWorkerType(aWorkerType)
{
SetIsDOMBinding();
MOZ_ASSERT_IF(IsSharedWorker(), !aSharedWorkerName.IsVoid() &&
NS_IsMainThread());
MOZ_ASSERT_IF(!IsSharedWorker(), 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);
}
else {
AssertIsOnMainThread();
RuntimeService::GetDefaultJSSettings(mJSSettings);
}
}
template <class Derived>
WorkerPrivateParent<Derived>::~WorkerPrivateParent()
{
MOZ_ASSERT(!mRooted);
DropJSObjects(this);
}
template <class Derived>
JSObject*
WorkerPrivateParent<Derived>::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aScope)
{
MOZ_ASSERT(!IsSharedWorker(),
"We should never wrap a WorkerPrivate for a SharedWorker");
AssertIsOnParentThread();
JS::Rooted<JSObject*> obj(aCx, WorkerBinding::Wrap(aCx, aScope, ParentAsWorkerPrivate()));
if (mRooted) {
PreserveWrapper(this);
}
return obj;
}
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().get());
if (JSContext* cx = self->mJSContext) {
MOZ_ASSERT(self->mThread);
JSRuntime* rt = JS_GetRuntime(cx);
MOZ_ASSERT(rt);
JS_TriggerOperationCallback(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()) {
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();
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.
if (IsSharedWorker()) {
AssertIsOnMainThread();
MOZ_ASSERT(mSharedWorkers.Count());
struct Closure
{
nsPIDOMWindow* mWindow;
bool mAllSuspended;
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(!IsSharedWorker(), mParentSuspended);
// Shared workers are resumed if any of their owning documents are resumed.
if (IsSharedWorker()) {
AssertIsOnMainThread();
MOZ_ASSERT(mSharedWorkers.Count());
struct Closure
{
nsPIDOMWindow* mWindow;
bool mAnyRunning;
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,
nsIScriptContext* aScriptContext)
{
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,
aScriptContext);
if (NS_FAILED(NS_DispatchToCurrentThread(runnable))) {
JS_ReportError(aCx, "Failed to dispatch to current thread!");
return false;
}
mSynchronizeRunnable = runnable;
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::_finalize(JSFreeOp* aFop)
{
AssertIsOnParentThread();
MOZ_ASSERT(!mRooted);
ClearWrapper();
// Ensure that we're held alive across the TerminatePrivate call, and then
// release the reference our wrapper held to us.
nsRefPtr<WorkerPrivateParent<Derived> > kungFuDeathGrip = dont_AddRef(this);
if (!TerminatePrivate(nullptr)) {
NS_WARNING("Failed to terminate!");
}
}
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) {
if (mBusyCount++ == 0) {
Root(true);
}
return true;
}
if (--mBusyCount == 0) {
Root(false);
bool shouldCancel;
{
MutexAutoLock lock(mMutex);
shouldCancel = mParentStatus == Terminating;
}
if (shouldCancel && !Cancel(aCx)) {
return false;
}
}
return true;
}
template <class Derived>
void
WorkerPrivateParent<Derived>::Root(bool aRoot)
{
AssertIsOnParentThread();
if (aRoot == mRooted) {
return;
}
if (aRoot) {
NS_ADDREF_THIS();
if (GetWrapperPreserveColor()) {
PreserveWrapper(this);
}
}
else {
if (GetWrapperPreserveColor()) {
ReleaseWrapper(this);
}
NS_RELEASE_THIS();
}
mRooted = aRoot;
}
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();
JSObject* array =
JS_NewArrayObject(aCx, realTransferable.Length(),
const_cast<JS::Value*>(realTransferable.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,
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;
buffer.swap(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;
}
nsCOMPtr<nsIScriptGlobalObject> sgo;
port->GetParentObject(getter_AddRefs(sgo));
MOZ_ASSERT(sgo, "Should never happen if IsClosed() returned false!");
MOZ_ASSERT(sgo->GetGlobalJSObject());
nsCOMPtr<nsIScriptContext> scx = sgo->GetContext();
MOZ_ASSERT_IF(scx, scx->GetNativeContext());
AutoPushJSContext cx(scx ? scx->GetNativeContext() : aCx);
JSAutoCompartment(cx, sgo->GetGlobalJSObject());
JS::Rooted<JS::Value> data(cx);
if (!buffer.read(cx, &data, WorkerStructuredCloneCallbacks(true))) {
return false;
}
buffer.clear();
nsRefPtr<nsDOMMessageEvent> event =
new nsDOMMessageEvent(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>::UpdateJSContextOptions(
JSContext* aCx,
const JS::ContextOptions& aContentOptions,
const JS::ContextOptions& aChromeOptions)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
mJSSettings.content.contextOptions = aContentOptions;
mJSSettings.chrome.contextOptions = aChromeOptions;
}
nsRefPtr<UpdateJSContextOptionsRunnable> runnable =
new UpdateJSContextOptionsRunnable(ParentAsWorkerPrivate(), aContentOptions,
aChromeOptions);
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>::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>::UpdateJITHardening(JSContext* aCx,
bool aJITHardening)
{
AssertIsOnParentThread();
{
MutexAutoLock lock(mMutex);
mJSSettings.jitHardening = aJITHardening;
}
nsRefPtr<UpdateJITHardeningRunnable> runnable =
new UpdateJITHardeningRunnable(ParentAsWorkerPrivate(), aJITHardening);
if (!runnable->Dispatch(aCx)) {
NS_WARNING("Failed to update worker jit hardening!");
JS_ClearPendingException(aCx);
}
}
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>
bool
WorkerPrivateParent<Derived>::RegisterSharedWorker(JSContext* aCx,
SharedWorker* aSharedWorker)
{
AssertIsOnMainThread();
MOZ_ASSERT(aSharedWorker);
MOZ_ASSERT(IsSharedWorker());
MOZ_ASSERT(!mSharedWorkers.Get(aSharedWorker->Serial()));
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());
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 (uint32_t index = 0; index < sharedWorkers.Length(); index++) {
nsRefPtr<SharedWorker>& sharedWorker = sharedWorkers[index];
// May be null.
nsPIDOMWindow* window = sharedWorker->GetOwner();
uint32_t actionsIndex = windowActions.LastIndexOf(WindowAction(window));
// Get the context for this window so that we can report errors correctly.
JSContext* cx;
rv = NS_OK;
if (actionsIndex == windowActions.NoIndex) {
nsIScriptContext* scx = sharedWorker->GetContextForEventHandlers(&rv);
cx = (NS_SUCCEEDED(rv) && scx) ?
scx->GetNativeContext() :
nsContentUtils::GetSafeJSContext();
} else {
cx = windowActions[actionsIndex].mJSContext;
}
AutoCxPusher autoPush(cx);
if (NS_FAILED(rv)) {
Throw(cx, rv);
JS_ReportPendingException(cx);
continue;
}
ErrorEventInit errorInit;
errorInit.mBubbles = false;
errorInit.mCancelable = true;
errorInit.mMessage = aMessage;
errorInit.mFilename = aFilename;
errorInit.mLineno = aLineNumber;
errorInit.mColumn = aColumnNumber;
nsRefPtr<ErrorEvent> errorEvent =
ErrorEvent::Constructor(sharedWorker, NS_LITERAL_STRING("error"),
errorInit);
if (!errorEvent) {
Throw(cx, NS_ERROR_UNEXPECTED);
JS_ReportPendingException(cx);
continue;
}
errorEvent->SetTrusted(true);
bool defaultActionEnabled;
rv = sharedWorker->DispatchEvent(errorEvent, &defaultActionEnabled);
if (NS_FAILED(rv)) {
Throw(cx, rv);
JS_ReportPendingException(cx);
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, cx));
}
} else 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;
}
JSContext* cx = windowAction.mJSContext;
AutoCxPusher autoPush(cx);
nsCOMPtr<nsIScriptGlobalObject> sgo =
do_QueryInterface(windowAction.mWindow);
MOZ_ASSERT(sgo);
MOZ_ASSERT(NS_IsMainThread());
InternalScriptErrorEvent event(true, NS_LOAD_ERROR);
event.lineNr = aLineNumber;
event.errorMsg = aMessage.BeginReading();
event.fileName = aFilename.BeginReading();
nsEventStatus status = nsEventStatus_eIgnore;
rv = sgo->HandleScriptError(&event, &status);
if (NS_FAILED(rv)) {
Throw(cx, rv);
JS_ReportPendingException(cx);
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());
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());
MOZ_ASSERT(aWindow);
struct Closure
{
nsPIDOMWindow* mWindow;
nsAutoTArray<nsRefPtr<SharedWorker>, 10> mSharedWorkers;
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()) {
// 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.AssignLiteral("?");
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.AssignLiteral("#");
mLocationInfo.mHash.Append(NS_ConvertUTF16toUTF8(unicodeRef));
}
}
if (mLocationInfo.mHash.IsEmpty()) {
mLocationInfo.mHash.AssignLiteral("#");
mLocationInfo.mHash.Append(temp);
}
}
if (NS_SUCCEEDED(aBaseURI->GetScheme(mLocationInfo.mProtocol))) {
mLocationInfo.mProtocol.AppendLiteral(":");
}
else {
mLocationInfo.mProtocol.Truncate();
}
int32_t port;
if (NS_SUCCEEDED(aBaseURI->GetPort(&port)) && port != -1) {
mLocationInfo.mPort.AppendInt(port);
nsAutoCString host(mLocationInfo.mHostname);
host.AppendLiteral(":");
host.Append(mLocationInfo.mPort);
mLocationInfo.mHost.Assign(host);
}
else {
mLocationInfo.mHost.Assign(mLocationInfo.mHostname);
}
}
template <class Derived>
void
WorkerPrivateParent<Derived>::SetPrincipal(nsIPrincipal* aPrincipal)
{
AssertIsOnMainThread();
mLoadInfo.mPrincipal = aPrincipal;
mLoadInfo.mPrincipalIsSystem = nsContentUtils::IsSystemPrincipal(aPrincipal);
}
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>, nsDOMEventTargetHelper)
template <class Derived>
NS_IMPL_RELEASE_INHERITED(WorkerPrivateParent<Derived>, nsDOMEventTargetHelper)
template <class Derived>
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(WorkerPrivateParent<Derived>)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
nsDOMEventTargetHelper)
// Nothing else to traverse
// The various strong references in LoadInfo are managed manually and cannot
// be cycle collected.
tmp->AssertIsOnParentThread();
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
nsDOMEventTargetHelper)
tmp->AssertIsOnParentThread();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
template <class Derived>
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(WorkerPrivateParent<Derived>,
nsDOMEventTargetHelper)
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 nsAString& 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)
#ifdef DEBUG
, mPRThread(nullptr)
#endif
{
MOZ_ASSERT_IF(IsSharedWorker(), !aSharedWorkerName.IsVoid());
MOZ_ASSERT_IF(!IsSharedWorker(), aSharedWorkerName.IsEmpty());
if (aParent) {
aParent->AssertIsOnWorkerThread();
aParent->GetAllPreferences(mPreferences);
}
else {
AssertIsOnMainThread();
RuntimeService::GetDefaultPreferences(mPreferences);
}
}
WorkerPrivate::~WorkerPrivate()
{
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
ErrorResult& aRv)
{
return WorkerPrivate::Constructor(aGlobal, aScriptURL, false, WorkerTypeDedicated,
EmptyString(), 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,
EmptyString(), nullptr, aRv).downcast<ChromeWorkerPrivate>();
}
// static
bool
ChromeWorkerPrivate::WorkerAvailable(JSContext* /* unused */, 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.
return nsContentUtils::ThreadsafeIsCallerChrome();
}
// static
already_AddRefed<WorkerPrivate>
WorkerPrivate::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
bool aIsChromeWorker, WorkerType aWorkerType,
const nsAString& aSharedWorkerName,
LoadInfo* aLoadInfo, ErrorResult& aRv)
{
WorkerPrivate* parent = NS_IsMainThread() ?
nullptr :
GetCurrentThreadWorkerPrivate();
if (parent) {
parent->AssertIsOnWorkerThread();
} else {
AssertIsOnMainThread();
}
JSContext* cx = aGlobal.GetContext();
MOZ_ASSERT_IF(aWorkerType == WorkerTypeShared,
!aSharedWorkerName.IsVoid());
MOZ_ASSERT_IF(aWorkerType != WorkerTypeShared,
aSharedWorkerName.IsEmpty());
Maybe<LoadInfo> stackLoadInfo;
if (!aLoadInfo) {
stackLoadInfo.construct();
nsresult rv = GetLoadInfo(cx, nullptr, parent, aScriptURL,
aIsChromeWorker, stackLoadInfo.addr());
if (NS_FAILED(rv)) {
scriptloader::ReportLoadError(cx, aScriptURL, rv, !parent);
aRv.Throw(rv);
return nullptr;
}
aLoadInfo = stackLoadInfo.addr();
}
// 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(cx, "Failed to create runtime service!");
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
}
else {
runtimeService = RuntimeService::GetService();
}
MOZ_ASSERT(runtimeService);
nsRefPtr<WorkerPrivate> worker =
new WorkerPrivate(cx, parent, aScriptURL, aIsChromeWorker,
aWorkerType, aSharedWorkerName, *aLoadInfo);
if (!runtimeService->RegisterWorker(cx, worker)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
nsRefPtr<CompileScriptRunnable> compiler = new CompileScriptRunnable(worker);
if (!compiler->Dispatch(cx)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
// The worker will be owned by its JSObject (via the reference we return from
// this function), but it also needs to be owned by its thread, so AddRef it
// again.
NS_ADDREF(worker.get());
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);
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;
}
rv = ChannelFromScriptURLWorkerThread(aCx, aParent, aScriptURL,
getter_AddRefs(loadInfo.mChannel));
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;
} 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::Rooted<JSScript*> script(aCx);
if (JS_DescribeScriptedCaller(aCx, &script, nullptr)) {
const char* fileName = JS_GetScriptFilename(aCx, script);
// 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));
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);
}
if (NS_FAILED(rv)) {
return rv;
}
}
loadInfo.mXHRParamsAllowed = true;
}
MOZ_ASSERT(loadInfo.mPrincipal);
MOZ_ASSERT(isChrome || !loadInfo.mDomain.IsEmpty());
// XXXbent Use subject principal here instead of the one we already have?
nsCOMPtr<nsIPrincipal> subjectPrincipal = ssm->GetCxSubjectPrincipal(aCx);
MOZ_ASSERT(subjectPrincipal);
if (!nsContentUtils::GetContentSecurityPolicy(aCx,
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.empty()) {
if (JSObject* global = js::DefaultObjectForContextOrNull(aCx)) {
workerCompartment.construct(aCx, global);
}
}
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.empty()) {
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_ASSUME_UNREACHABLE("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::OperationCallback(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()
{
AssertIsOnWorkerThread();
MOZ_ASSERT(mChildWorkers.IsEmpty());
MOZ_ASSERT(mSyncLoopStack.IsEmpty());
ClearMainEventQueue();
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_DISPATCH_NORMAL))) {
NS_WARNING("Failed to dispatch runnable!");
}
}
}
bool
WorkerPrivate::BlockAndCollectRuntimeStats(JS::RuntimeStats* aRtStats)
{
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 operation
// callback to trap the worker.
if (!mBlockedForMemoryReporter) {
JS_TriggerOperationCallback(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);
}
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()
{
AssertIsOnWorkerThread();
nsIThread* currentThread = NS_GetCurrentThread();
MOZ_ASSERT(currentThread);
MOZ_ASSERT(!mCancelAllPendingRunnables);
mCancelAllPendingRunnables = true;
NS_ProcessPendingEvents(currentThread);
MOZ_ASSERT(!NS_HasPendingEvents(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();
if (normalRunnablesPending) {
break;
}
}
}
// 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.IsEmpty());
MOZ_ASSERT(mSyncLoopStack.Length() - 1 == currentLoopIndex);
MOZ_ASSERT(mSyncLoopStack[currentLoopIndex] == loopInfo);
// We're about to delete |loop|, stash its event target and result.
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 |loop|!
mSyncLoopStack.RemoveElementAt(currentLoopIndex);
}
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(thread->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();
JSObject* array =
JS_NewArrayObject(aCx, realTransferable.Length(),
const_cast<jsval*>(realTransferable.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,
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();
}
// 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) {
if (aReport->ucmessage) {
message = aReport->ucmessage;
}
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));
JSPrincipals* principal = GetWorkerPrincipal();
// 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);
/*
* unsafeGet() is needed below because the argument is a not a const
* pointer, even though values are not modified.
*/
if (!JS_CallFunctionValue(aCx, global, info->mTimeoutCallable,
info->mExtraArgVals.Length(),
info->mExtraArgVals.Elements()->unsafeGet(),
rval.address()) &&
!JS_ReportPendingException(aCx)) {
retval = false;
break;
}
}
else {
nsString expression = info->mTimeoutString;
JS::CompileOptions options(aCx);
options.setPrincipals(principal)
.setFileAndLine(info->mFilename.get(), info->mLineNumber);
if ((expression.IsEmpty() ||
!JS::Evaluate(aCx, global, options, expression.get(),
expression.Length(), nullptr)) &&
!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::UpdateJSContextOptionsInternal(JSContext* aCx,
const JS::ContextOptions& aContentOptions,
const JS::ContextOptions& aChromeOptions)
{
AssertIsOnWorkerThread();
JS::ContextOptionsRef(aCx) = IsChromeWorker() ? aChromeOptions : aContentOptions;
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateJSContextOptions(aCx, aContentOptions,
aChromeOptions);
}
}
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::UpdateJITHardeningInternal(JSContext* aCx, bool aJITHardening)
{
AssertIsOnWorkerThread();
JS_SetJitHardening(JS_GetRuntime(aCx), aJITHardening);
for (uint32_t index = 0; index < mChildWorkers.Length(); index++) {
mChildWorkers[index]->UpdateJITHardening(aCx, aJITHardening);
}
}
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<nsDOMMessageEvent> event =
nsDOMMessageEvent::Constructor(globalObject, aCx,
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 {
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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