зеркало из https://github.com/mozilla/gecko-dev.git
297 строки
9.7 KiB
C++
297 строки
9.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "SharedMessageBody.h"
|
|
#include "mozilla/dom/File.h"
|
|
#include "mozilla/dom/MessagePort.h"
|
|
#include "mozilla/dom/RefMessageBodyService.h"
|
|
#include "mozilla/dom/PMessagePort.h"
|
|
#include "mozilla/ipc/BackgroundChild.h"
|
|
#include "mozilla/ipc/BackgroundParent.h"
|
|
|
|
namespace mozilla {
|
|
|
|
using namespace ipc;
|
|
|
|
namespace dom {
|
|
|
|
SharedMessageBody::SharedMessageBody(
|
|
StructuredCloneHolder::TransferringSupport aSupportsTransferring,
|
|
const Maybe<nsID>& aAgentClusterId)
|
|
: mRefDataId(Nothing()),
|
|
mSupportsTransferring(aSupportsTransferring),
|
|
mAgentClusterId(aAgentClusterId) {}
|
|
|
|
void SharedMessageBody::Write(JSContext* aCx, JS::Handle<JS::Value> aValue,
|
|
JS::Handle<JS::Value> aTransfers, nsID& aPortID,
|
|
RefMessageBodyService* aRefMessageBodyService,
|
|
ErrorResult& aRv) {
|
|
MOZ_ASSERT(!mCloneData && !mRefData);
|
|
MOZ_ASSERT(aRefMessageBodyService);
|
|
|
|
JS::CloneDataPolicy cloneDataPolicy;
|
|
// During a writing, we don't know the destination, so we assume it is part of
|
|
// the same agent cluster.
|
|
cloneDataPolicy.allowIntraClusterClonableSharedObjects();
|
|
|
|
nsIGlobalObject* global = xpc::CurrentNativeGlobal(aCx);
|
|
MOZ_ASSERT(global);
|
|
|
|
if (global->IsSharedMemoryAllowed()) {
|
|
cloneDataPolicy.allowSharedMemoryObjects();
|
|
}
|
|
|
|
mCloneData = MakeUnique<ipc::StructuredCloneData>(
|
|
JS::StructuredCloneScope::UnknownDestination, mSupportsTransferring);
|
|
mCloneData->Write(aCx, aValue, aTransfers, cloneDataPolicy, aRv);
|
|
if (NS_WARN_IF(aRv.Failed())) {
|
|
return;
|
|
}
|
|
|
|
if (mCloneData->CloneScope() == JS::StructuredCloneScope::DifferentProcess) {
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(mCloneData->CloneScope() == JS::StructuredCloneScope::SameProcess);
|
|
RefPtr<RefMessageBody> refData =
|
|
new RefMessageBody(aPortID, std::move(mCloneData));
|
|
|
|
mRefDataId.emplace(aRefMessageBodyService->Register(refData.forget(), aRv));
|
|
}
|
|
|
|
void SharedMessageBody::Read(JSContext* aCx,
|
|
JS::MutableHandle<JS::Value> aValue,
|
|
RefMessageBodyService* aRefMessageBodyService,
|
|
SharedMessageBody::ReadMethod aReadMethod,
|
|
ErrorResult& aRv) {
|
|
MOZ_ASSERT(aRefMessageBodyService);
|
|
|
|
if (mCloneData) {
|
|
// Use a default cloneDataPolicy here, because SharedArrayBuffers and WASM
|
|
// are not supported.
|
|
return mCloneData->Read(aCx, aValue, JS::CloneDataPolicy(), aRv);
|
|
}
|
|
|
|
JS::CloneDataPolicy cloneDataPolicy;
|
|
|
|
nsIGlobalObject* global = xpc::CurrentNativeGlobal(aCx);
|
|
MOZ_ASSERT(global);
|
|
|
|
// Clones within the same agent cluster are allowed to use shared array
|
|
// buffers and WASM modules.
|
|
if (mAgentClusterId.isSome()) {
|
|
Maybe<nsID> agentClusterId = global->GetAgentClusterId();
|
|
if (agentClusterId.isSome() &&
|
|
mAgentClusterId.value().Equals(agentClusterId.value())) {
|
|
cloneDataPolicy.allowIntraClusterClonableSharedObjects();
|
|
}
|
|
}
|
|
|
|
if (global->IsSharedMemoryAllowed()) {
|
|
cloneDataPolicy.allowSharedMemoryObjects();
|
|
}
|
|
|
|
MOZ_ASSERT(!mRefData);
|
|
MOZ_ASSERT(mRefDataId.isSome());
|
|
|
|
if (aReadMethod == SharedMessageBody::StealRefMessageBody) {
|
|
mRefData = aRefMessageBodyService->Steal(mRefDataId.value());
|
|
} else {
|
|
MOZ_ASSERT(aReadMethod == SharedMessageBody::KeepRefMessageBody);
|
|
mRefData = aRefMessageBodyService->GetAndCount(mRefDataId.value());
|
|
}
|
|
|
|
if (!mRefData) {
|
|
aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
|
|
return;
|
|
}
|
|
|
|
mRefData->CloneData()->Read(aCx, aValue, cloneDataPolicy, aRv);
|
|
}
|
|
|
|
bool SharedMessageBody::TakeTransferredPortsAsSequence(
|
|
Sequence<OwningNonNull<mozilla::dom::MessagePort>>& aPorts) {
|
|
if (mCloneData) {
|
|
return mCloneData->TakeTransferredPortsAsSequence(aPorts);
|
|
}
|
|
|
|
MOZ_ASSERT(mRefData);
|
|
return mRefData->CloneData()->TakeTransferredPortsAsSequence(aPorts);
|
|
}
|
|
|
|
/* static */
|
|
void SharedMessageBody::FromSharedToMessageChild(
|
|
mozilla::ipc::PBackgroundChild* aManager, SharedMessageBody* aData,
|
|
MessageData& aMessage) {
|
|
MOZ_ASSERT(aManager);
|
|
MOZ_ASSERT(aData);
|
|
|
|
aMessage.agentClusterId() = aData->mAgentClusterId;
|
|
|
|
if (aData->mCloneData) {
|
|
ClonedMessageData clonedData;
|
|
aData->mCloneData->BuildClonedMessageDataForBackgroundChild(aManager,
|
|
clonedData);
|
|
aMessage.data() = std::move(clonedData);
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(aData->mRefDataId.isSome());
|
|
aMessage.data() = RefMessageData(aData->mRefDataId.value());
|
|
}
|
|
|
|
/* static */
|
|
void SharedMessageBody::FromSharedToMessagesChild(
|
|
PBackgroundChild* aManager,
|
|
const nsTArray<RefPtr<SharedMessageBody>>& aData,
|
|
nsTArray<MessageData>& aArray) {
|
|
MOZ_ASSERT(aManager);
|
|
MOZ_ASSERT(aArray.IsEmpty());
|
|
aArray.SetCapacity(aData.Length());
|
|
|
|
for (auto& data : aData) {
|
|
MessageData* message = aArray.AppendElement();
|
|
FromSharedToMessageChild(aManager, data, *message);
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
already_AddRefed<SharedMessageBody> SharedMessageBody::FromMessageToSharedChild(
|
|
MessageData& aMessage,
|
|
StructuredCloneHolder::TransferringSupport aSupportsTransferring) {
|
|
RefPtr<SharedMessageBody> data =
|
|
new SharedMessageBody(aSupportsTransferring, aMessage.agentClusterId());
|
|
|
|
if (aMessage.data().type() == MessageDataType::TClonedMessageData) {
|
|
data->mCloneData = MakeUnique<ipc::StructuredCloneData>(
|
|
JS::StructuredCloneScope::UnknownDestination, aSupportsTransferring);
|
|
data->mCloneData->StealFromClonedMessageDataForBackgroundChild(
|
|
aMessage.data().get_ClonedMessageData());
|
|
} else {
|
|
MOZ_ASSERT(aMessage.data().type() == MessageDataType::TRefMessageData);
|
|
data->mRefDataId.emplace(aMessage.data().get_RefMessageData().uuid());
|
|
}
|
|
|
|
return data.forget();
|
|
}
|
|
|
|
/* static */
|
|
already_AddRefed<SharedMessageBody> SharedMessageBody::FromMessageToSharedChild(
|
|
const MessageData& aMessage,
|
|
StructuredCloneHolder::TransferringSupport aSupportsTransferring) {
|
|
RefPtr<SharedMessageBody> data =
|
|
new SharedMessageBody(aSupportsTransferring, aMessage.agentClusterId());
|
|
|
|
if (aMessage.data().type() == MessageDataType::TClonedMessageData) {
|
|
data->mCloneData = MakeUnique<ipc::StructuredCloneData>(
|
|
JS::StructuredCloneScope::UnknownDestination, aSupportsTransferring);
|
|
data->mCloneData->BorrowFromClonedMessageDataForBackgroundChild(
|
|
aMessage.data().get_ClonedMessageData());
|
|
} else {
|
|
MOZ_ASSERT(aMessage.data().type() == MessageDataType::TRefMessageData);
|
|
data->mRefDataId.emplace(aMessage.data().get_RefMessageData().uuid());
|
|
}
|
|
|
|
return data.forget();
|
|
}
|
|
|
|
/* static */
|
|
bool SharedMessageBody::FromMessagesToSharedChild(
|
|
nsTArray<MessageData>& aArray,
|
|
FallibleTArray<RefPtr<SharedMessageBody>>& aData,
|
|
StructuredCloneHolder::TransferringSupport aSupportsTransferring) {
|
|
MOZ_ASSERT(aData.IsEmpty());
|
|
|
|
if (NS_WARN_IF(!aData.SetCapacity(aArray.Length(), mozilla::fallible))) {
|
|
return false;
|
|
}
|
|
|
|
for (auto& message : aArray) {
|
|
RefPtr<SharedMessageBody> data =
|
|
FromMessageToSharedChild(message, aSupportsTransferring);
|
|
if (!data || !aData.AppendElement(data, mozilla::fallible)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* static */
|
|
bool SharedMessageBody::FromSharedToMessagesParent(
|
|
PBackgroundParent* aManager,
|
|
const nsTArray<RefPtr<SharedMessageBody>>& aData,
|
|
FallibleTArray<MessageData>& aArray) {
|
|
MOZ_ASSERT(aManager);
|
|
MOZ_ASSERT(aArray.IsEmpty());
|
|
|
|
if (NS_WARN_IF(!aArray.SetCapacity(aData.Length(), mozilla::fallible))) {
|
|
return false;
|
|
}
|
|
|
|
for (auto& data : aData) {
|
|
MessageData* message = aArray.AppendElement(mozilla::fallible);
|
|
message->agentClusterId() = data->mAgentClusterId;
|
|
|
|
if (data->mCloneData) {
|
|
ClonedMessageData clonedData;
|
|
data->mCloneData->BuildClonedMessageDataForBackgroundParent(aManager,
|
|
clonedData);
|
|
message->data() = std::move(clonedData);
|
|
continue;
|
|
}
|
|
|
|
MOZ_ASSERT(data->mRefDataId.isSome());
|
|
message->data() = RefMessageData(data->mRefDataId.value());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* static */
|
|
already_AddRefed<SharedMessageBody>
|
|
SharedMessageBody::FromMessageToSharedParent(
|
|
MessageData& aMessage,
|
|
StructuredCloneHolder::TransferringSupport aSupportsTransferring) {
|
|
RefPtr<SharedMessageBody> data =
|
|
new SharedMessageBody(aSupportsTransferring, aMessage.agentClusterId());
|
|
|
|
if (aMessage.data().type() == MessageDataType::TClonedMessageData) {
|
|
data->mCloneData = MakeUnique<ipc::StructuredCloneData>(
|
|
JS::StructuredCloneScope::UnknownDestination, aSupportsTransferring);
|
|
data->mCloneData->StealFromClonedMessageDataForBackgroundParent(
|
|
aMessage.data().get_ClonedMessageData());
|
|
} else {
|
|
MOZ_ASSERT(aMessage.data().type() == MessageDataType::TRefMessageData);
|
|
data->mRefDataId.emplace(aMessage.data().get_RefMessageData().uuid());
|
|
}
|
|
|
|
return data.forget();
|
|
}
|
|
|
|
bool SharedMessageBody::FromMessagesToSharedParent(
|
|
nsTArray<MessageData>& aArray,
|
|
FallibleTArray<RefPtr<SharedMessageBody>>& aData,
|
|
StructuredCloneHolder::TransferringSupport aSupportsTransferring) {
|
|
MOZ_ASSERT(aData.IsEmpty());
|
|
|
|
if (NS_WARN_IF(!aData.SetCapacity(aArray.Length(), mozilla::fallible))) {
|
|
return false;
|
|
}
|
|
|
|
for (auto& message : aArray) {
|
|
RefPtr<SharedMessageBody> data = FromMessageToSharedParent(message);
|
|
if (!data || !aData.AppendElement(data, mozilla::fallible)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|