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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "RemoteWorkerController.h"
#include <utility>
#include "nsDebug.h"
#include "mozilla/Assertions.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Maybe.h"
#include "mozilla/RemoteLazyInputStreamStorage.h"
#include "mozilla/dom/FetchEventOpParent.h"
#include "mozilla/dom/FetchEventOpProxyParent.h"
#include "mozilla/dom/MessagePortParent.h"
#include "mozilla/dom/RemoteWorkerTypes.h"
#include "mozilla/dom/ServiceWorkerCloneData.h"
#include "mozilla/dom/ServiceWorkerShutdownState.h"
#include "mozilla/ipc/BackgroundParent.h"
#include "RemoteWorkerControllerParent.h"
#include "RemoteWorkerManager.h"
#include "RemoteWorkerParent.h"
namespace mozilla {
using namespace ipc;
namespace dom {
/* static */
already_AddRefed<RemoteWorkerController> RemoteWorkerController::Create(
const RemoteWorkerData& aData, RemoteWorkerObserver* aObserver,
base::ProcessId aProcessId) {
AssertIsInMainProcess();
AssertIsOnBackgroundThread();
MOZ_ASSERT(aObserver);
RefPtr<RemoteWorkerController> controller =
new RemoteWorkerController(aData, aObserver);
RefPtr<RemoteWorkerManager> manager = RemoteWorkerManager::GetOrCreate();
MOZ_ASSERT(manager);
// XXX: We do not check for failure here, should we?
manager->Launch(controller, aData, aProcessId);
return controller.forget();
}
RemoteWorkerController::RemoteWorkerController(const RemoteWorkerData& aData,
RemoteWorkerObserver* aObserver)
: mObserver(aObserver),
mState(ePending),
mIsServiceWorker(aData.serviceWorkerData().type() ==
OptionalServiceWorkerData::TServiceWorkerData) {
AssertIsInMainProcess();
AssertIsOnBackgroundThread();
}
RemoteWorkerController::~RemoteWorkerController() {
AssertIsOnBackgroundThread();
MOZ_DIAGNOSTIC_ASSERT(mPendingOps.IsEmpty());
}
void RemoteWorkerController::SetWorkerActor(RemoteWorkerParent* aActor) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(!mActor);
MOZ_ASSERT(aActor);
mActor = aActor;
}
void RemoteWorkerController::NoteDeadWorkerActor() {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mActor);
// The actor has been destroyed without a proper close() notification. Let's
// inform the observer.
if (mState == eReady) {
mObserver->Terminated();
}
mActor = nullptr;
Shutdown();
}
void RemoteWorkerController::CreationFailed() {
AssertIsOnBackgroundThread();
MOZ_ASSERT(XRE_IsParentProcess());
MOZ_ASSERT(mState == ePending || mState == eTerminated);
if (mState == eTerminated) {
MOZ_ASSERT(!mActor);
MOZ_ASSERT(mPendingOps.IsEmpty());
// Nothing to do.
return;
}
NoteDeadWorker();
mObserver->CreationFailed();
}
void RemoteWorkerController::CreationSucceeded() {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mState == ePending || mState == eTerminated);
if (mState == eTerminated) {
MOZ_ASSERT(!mActor);
MOZ_ASSERT(mPendingOps.IsEmpty());
// Nothing to do.
return;
}
MOZ_ASSERT(mActor);
mState = eReady;
mObserver->CreationSucceeded();
auto pendingOps = std::move(mPendingOps);
for (auto& op : pendingOps) {
DebugOnly<bool> started = op->MaybeStart(this);
MOZ_ASSERT(started);
}
}
void RemoteWorkerController::ErrorPropagation(const ErrorValue& aValue) {
AssertIsOnBackgroundThread();
mObserver->ErrorReceived(aValue);
}
void RemoteWorkerController::NotifyLock(bool aCreated) {
AssertIsOnBackgroundThread();
mObserver->LockNotified(aCreated);
}
void RemoteWorkerController::NotifyWebTransport(bool aCreated) {
AssertIsOnBackgroundThread();
mObserver->WebTransportNotified(aCreated);
}
void RemoteWorkerController::WorkerTerminated() {
AssertIsOnBackgroundThread();
NoteDeadWorker();
mObserver->Terminated();
}
void RemoteWorkerController::CancelAllPendingOps() {
AssertIsOnBackgroundThread();
auto pendingOps = std::move(mPendingOps);
for (auto& op : pendingOps) {
op->Cancel();
}
}
void RemoteWorkerController::Shutdown() {
AssertIsOnBackgroundThread();
Unused << NS_WARN_IF(mIsServiceWorker && !mPendingOps.IsEmpty());
if (mState == eTerminated) {
MOZ_ASSERT(mPendingOps.IsEmpty());
return;
}
mState = eTerminated;
CancelAllPendingOps();
if (!mActor) {
return;
}
mActor->SetController(nullptr);
/**
* The "non-remote-side" of the Service Worker will have ensured that the
* remote worker is terminated before calling `Shutdown().`
*/
if (mIsServiceWorker) {
mActor->MaybeSendDelete();
} else {
Unused << mActor->SendExecOp(RemoteWorkerTerminateOp());
}
mActor = nullptr;
}
void RemoteWorkerController::NoteDeadWorker() {
AssertIsOnBackgroundThread();
CancelAllPendingOps();
/**
* The "non-remote-side" of the Service Worker will initiate `Shutdown()`
* once it's notified that all dispatched operations have either completed
* or canceled. That is, it'll explicitly call `Shutdown()` later.
*/
if (!mIsServiceWorker) {
Shutdown();
}
}
template <typename... Args>
void RemoteWorkerController::MaybeStartSharedWorkerOp(Args&&... aArgs) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(!mIsServiceWorker);
UniquePtr<PendingSharedWorkerOp> op =
MakeUnique<PendingSharedWorkerOp>(std::forward<Args>(aArgs)...);
if (!op->MaybeStart(this)) {
mPendingOps.AppendElement(std::move(op));
}
}
void RemoteWorkerController::AddWindowID(uint64_t aWindowID) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(aWindowID);
MaybeStartSharedWorkerOp(PendingSharedWorkerOp::eAddWindowID, aWindowID);
}
void RemoteWorkerController::RemoveWindowID(uint64_t aWindowID) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(aWindowID);
MaybeStartSharedWorkerOp(PendingSharedWorkerOp::eRemoveWindowID, aWindowID);
}
void RemoteWorkerController::AddPortIdentifier(
const MessagePortIdentifier& aPortIdentifier) {
AssertIsOnBackgroundThread();
MaybeStartSharedWorkerOp(aPortIdentifier);
}
void RemoteWorkerController::Terminate() {
AssertIsOnBackgroundThread();
MaybeStartSharedWorkerOp(PendingSharedWorkerOp::eTerminate);
}
void RemoteWorkerController::Suspend() {
AssertIsOnBackgroundThread();
MaybeStartSharedWorkerOp(PendingSharedWorkerOp::eSuspend);
}
void RemoteWorkerController::Resume() {
AssertIsOnBackgroundThread();
MaybeStartSharedWorkerOp(PendingSharedWorkerOp::eResume);
}
void RemoteWorkerController::Freeze() {
AssertIsOnBackgroundThread();
MaybeStartSharedWorkerOp(PendingSharedWorkerOp::eFreeze);
}
void RemoteWorkerController::Thaw() {
AssertIsOnBackgroundThread();
MaybeStartSharedWorkerOp(PendingSharedWorkerOp::eThaw);
}
RefPtr<ServiceWorkerOpPromise> RemoteWorkerController::ExecServiceWorkerOp(
ServiceWorkerOpArgs&& aArgs) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mIsServiceWorker);
RefPtr<ServiceWorkerOpPromise::Private> promise =
new ServiceWorkerOpPromise::Private(__func__);
UniquePtr<PendingServiceWorkerOp> op =
MakeUnique<PendingServiceWorkerOp>(std::move(aArgs), promise);
if (!op->MaybeStart(this)) {
mPendingOps.AppendElement(std::move(op));
}
return promise;
}
RefPtr<ServiceWorkerFetchEventOpPromise>
RemoteWorkerController::ExecServiceWorkerFetchEventOp(
const ParentToParentServiceWorkerFetchEventOpArgs& aArgs,
RefPtr<FetchEventOpParent> aReal) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mIsServiceWorker);
RefPtr<ServiceWorkerFetchEventOpPromise::Private> promise =
new ServiceWorkerFetchEventOpPromise::Private(__func__);
UniquePtr<PendingSWFetchEventOp> op =
MakeUnique<PendingSWFetchEventOp>(aArgs, promise, std::move(aReal));
if (!op->MaybeStart(this)) {
mPendingOps.AppendElement(std::move(op));
}
return promise;
}
RefPtr<GenericPromise> RemoteWorkerController::SetServiceWorkerSkipWaitingFlag()
const {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mObserver);
RefPtr<GenericPromise::Private> promise =
new GenericPromise::Private(__func__);
static_cast<RemoteWorkerControllerParent*>(mObserver.get())
->MaybeSendSetServiceWorkerSkipWaitingFlag(
[promise](bool aOk) { promise->Resolve(aOk, __func__); });
return promise;
}
bool RemoteWorkerController::IsTerminated() const {
return mState == eTerminated;
}
RemoteWorkerController::PendingSharedWorkerOp::PendingSharedWorkerOp(
Type aType, uint64_t aWindowID)
: mType(aType), mWindowID(aWindowID) {
AssertIsOnBackgroundThread();
}
RemoteWorkerController::PendingSharedWorkerOp::PendingSharedWorkerOp(
const MessagePortIdentifier& aPortIdentifier)
: mType(ePortIdentifier), mPortIdentifier(aPortIdentifier) {
AssertIsOnBackgroundThread();
}
RemoteWorkerController::PendingSharedWorkerOp::~PendingSharedWorkerOp() {
AssertIsOnBackgroundThread();
MOZ_DIAGNOSTIC_ASSERT(mCompleted);
}
bool RemoteWorkerController::PendingSharedWorkerOp::MaybeStart(
RemoteWorkerController* const aOwner) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(!mCompleted);
MOZ_ASSERT(aOwner);
if (aOwner->mState == RemoteWorkerController::eTerminated) {
Cancel();
return true;
}
if (aOwner->mState == RemoteWorkerController::ePending &&
mType != eTerminate) {
return false;
}
switch (mType) {
case eTerminate:
aOwner->Shutdown();
break;
case eSuspend:
Unused << aOwner->mActor->SendExecOp(RemoteWorkerSuspendOp());
break;
case eResume:
Unused << aOwner->mActor->SendExecOp(RemoteWorkerResumeOp());
break;
case eFreeze:
Unused << aOwner->mActor->SendExecOp(RemoteWorkerFreezeOp());
break;
case eThaw:
Unused << aOwner->mActor->SendExecOp(RemoteWorkerThawOp());
break;
case ePortIdentifier:
Unused << aOwner->mActor->SendExecOp(
RemoteWorkerPortIdentifierOp(mPortIdentifier));
break;
case eAddWindowID:
Unused << aOwner->mActor->SendExecOp(
RemoteWorkerAddWindowIDOp(mWindowID));
break;
case eRemoveWindowID:
Unused << aOwner->mActor->SendExecOp(
RemoteWorkerRemoveWindowIDOp(mWindowID));
break;
default:
MOZ_CRASH("Unknown op.");
}
mCompleted = true;
return true;
}
void RemoteWorkerController::PendingSharedWorkerOp::Cancel() {
AssertIsOnBackgroundThread();
MOZ_ASSERT(!mCompleted);
// We don't want to leak the port if the operation has not been processed.
if (mType == ePortIdentifier) {
MessagePortParent::ForceClose(mPortIdentifier.uuid(),
mPortIdentifier.destinationUuid(),
mPortIdentifier.sequenceId());
}
mCompleted = true;
}
RemoteWorkerController::PendingServiceWorkerOp::PendingServiceWorkerOp(
ServiceWorkerOpArgs&& aArgs,
RefPtr<ServiceWorkerOpPromise::Private> aPromise)
: mArgs(std::move(aArgs)), mPromise(std::move(aPromise)) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mPromise);
}
RemoteWorkerController::PendingServiceWorkerOp::~PendingServiceWorkerOp() {
AssertIsOnBackgroundThread();
MOZ_DIAGNOSTIC_ASSERT(!mPromise);
}
bool RemoteWorkerController::PendingServiceWorkerOp::MaybeStart(
RemoteWorkerController* const aOwner) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mPromise);
MOZ_ASSERT(aOwner);
if (NS_WARN_IF(aOwner->mState == RemoteWorkerController::eTerminated)) {
mPromise->Reject(NS_ERROR_DOM_ABORT_ERR, __func__);
mPromise = nullptr;
return true;
}
// The target content process must still be starting up.
if (!aOwner->mActor) {
// We can avoid starting the worker at all if we know it should be
// terminated.
MOZ_ASSERT(aOwner->mState == RemoteWorkerController::ePending);
if (mArgs.type() ==
ServiceWorkerOpArgs::TServiceWorkerTerminateWorkerOpArgs) {
aOwner->CancelAllPendingOps();
Cancel();
aOwner->mState = RemoteWorkerController::eTerminated;
return true;
}
return false;
}
/**
* Allow termination operations to pass through while pending because the
* remote Service Worker can be terminated while still starting up.
*/
if (aOwner->mState == RemoteWorkerController::ePending &&
mArgs.type() !=
ServiceWorkerOpArgs::TServiceWorkerTerminateWorkerOpArgs) {
return false;
}
MaybeReportServiceWorkerShutdownProgress(mArgs);
aOwner->mActor->SendExecServiceWorkerOp(mArgs)->Then(
GetCurrentSerialEventTarget(), __func__,
[promise = std::move(mPromise)](
PRemoteWorkerParent::ExecServiceWorkerOpPromise::
ResolveOrRejectValue&& aResult) {
if (NS_WARN_IF(aResult.IsReject())) {
promise->Reject(NS_ERROR_DOM_ABORT_ERR, __func__);
return;
}
promise->Resolve(std::move(aResult.ResolveValue()), __func__);
});
return true;
}
void RemoteWorkerController::PendingServiceWorkerOp::Cancel() {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mPromise);
mPromise->Reject(NS_ERROR_DOM_ABORT_ERR, __func__);
mPromise = nullptr;
}
RemoteWorkerController::PendingSWFetchEventOp::PendingSWFetchEventOp(
const ParentToParentServiceWorkerFetchEventOpArgs& aArgs,
RefPtr<ServiceWorkerFetchEventOpPromise::Private> aPromise,
RefPtr<FetchEventOpParent>&& aReal)
: mArgs(aArgs), mPromise(std::move(aPromise)), mReal(aReal) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mPromise);
// If there is a TParentToParentStream in the request body, we need to
// save it to our stream.
IPCInternalRequest& req = mArgs.common().internalRequest();
if (req.body().isSome() &&
req.body().ref().type() == BodyStreamVariant::TParentToParentStream) {
nsCOMPtr<nsIInputStream> stream;
auto streamLength = req.bodySize();
const auto& uuid = req.body().ref().get_ParentToParentStream().uuid();
auto storage = RemoteLazyInputStreamStorage::Get().unwrapOr(nullptr);
MOZ_DIAGNOSTIC_ASSERT(storage);
storage->GetStream(uuid, 0, streamLength, getter_AddRefs(mBodyStream));
storage->ForgetStream(uuid);
MOZ_DIAGNOSTIC_ASSERT(mBodyStream);
req.body() = Nothing();
}
}
RemoteWorkerController::PendingSWFetchEventOp::~PendingSWFetchEventOp() {
AssertIsOnBackgroundThread();
MOZ_DIAGNOSTIC_ASSERT(!mPromise);
}
bool RemoteWorkerController::PendingSWFetchEventOp::MaybeStart(
RemoteWorkerController* const aOwner) {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mPromise);
MOZ_ASSERT(aOwner);
if (NS_WARN_IF(aOwner->mState == RemoteWorkerController::eTerminated)) {
mPromise->Reject(NS_ERROR_DOM_ABORT_ERR, __func__);
mPromise = nullptr;
// Because the worker has transitioned to terminated, this operation is moot
// and so we should return true because there's no need to queue it.
return true;
}
// The target content process must still be starting up.
if (!aOwner->mActor) {
MOZ_ASSERT(aOwner->mState == RemoteWorkerController::ePending);
return false;
}
// At this point we are handing off responsibility for the promise to the
// actor.
FetchEventOpProxyParent::Create(aOwner->mActor.get(), std::move(mPromise),
mArgs, std::move(mReal),
std::move(mBodyStream));
return true;
}
void RemoteWorkerController::PendingSWFetchEventOp::Cancel() {
AssertIsOnBackgroundThread();
MOZ_ASSERT(mPromise);
if (mPromise) {
mPromise->Reject(NS_ERROR_DOM_ABORT_ERR, __func__);
mPromise = nullptr;
}
}
} // namespace dom
} // namespace mozilla