tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

JSProcessActorParent.cpp (3364B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "mozilla/dom/JSProcessActorParent.h"
      8 
      9 #include "mozilla/dom/InProcessChild.h"
     10 #include "mozilla/dom/InProcessParent.h"
     11 #include "mozilla/dom/JSIPCValue.h"
     12 #include "mozilla/dom/JSIPCValueUtils.h"
     13 #include "mozilla/dom/JSProcessActorBinding.h"
     14 
     15 namespace mozilla::dom {
     16 
     17 NS_IMPL_CYCLE_COLLECTION_INHERITED(JSProcessActorParent, JSActor, mManager)
     18 
     19 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSProcessActorParent)
     20 NS_INTERFACE_MAP_END_INHERITING(JSActor)
     21 
     22 NS_IMPL_ADDREF_INHERITED(JSProcessActorParent, JSActor)
     23 NS_IMPL_RELEASE_INHERITED(JSProcessActorParent, JSActor)
     24 
     25 JSObject* JSProcessActorParent::WrapObject(JSContext* aCx,
     26                                           JS::Handle<JSObject*> aGivenProto) {
     27  return JSProcessActorParent_Binding::Wrap(aCx, this, aGivenProto);
     28 }
     29 
     30 void JSProcessActorParent::Init(const nsACString& aName,
     31                                nsIDOMProcessParent* aManager) {
     32  MOZ_ASSERT(!mManager, "Cannot Init() a JSProcessActorParent twice!");
     33  mManager = aManager;
     34  JSActor::Init(aName, /* aSendTyped= */ false);
     35 }
     36 
     37 JSProcessActorParent::~JSProcessActorParent() { MOZ_ASSERT(!mManager); }
     38 
     39 void JSProcessActorParent::SendRawMessage(
     40    const JSActorMessageMeta& aMeta, JSIPCValue&& aData,
     41    UniquePtr<ipc::StructuredCloneData> aStack, ErrorResult& aRv) {
     42  if (NS_WARN_IF(!CanSend() || !mManager || !mManager->GetCanSend())) {
     43    aRv.ThrowInvalidStateError(
     44        nsPrintfCString("Actor '%s' cannot send message '%s' during shutdown.",
     45                        PromiseFlatCString(aMeta.actorName()).get(),
     46                        NS_ConvertUTF16toUTF8(aMeta.messageName()).get()));
     47    return;
     48  }
     49 
     50  // If the parent side is in the same process, we have a PInProcess manager,
     51  // and can dispatch the message directly to the event loop.
     52  ContentParent* contentParent = mManager->AsContentParent();
     53  if (!contentParent) {
     54    SendRawMessageInProcess(aMeta, std::move(aData), std::move(aStack), []() {
     55      return do_AddRef(InProcessChild::Singleton());
     56    });
     57    return;
     58  }
     59 
     60  // Cross-process case - send data over ContentParent to other side.
     61  JSIPCValueUtils::SCDHolder holder;
     62  if (NS_WARN_IF(!JSIPCValueUtils::PrepareForSending(holder, aData))) {
     63    aRv.ThrowDataCloneError(
     64        nsPrintfCString("Actor '%s' cannot send message '%s': cannot clone.",
     65                        PromiseFlatCString(aMeta.actorName()).get(),
     66                        NS_ConvertUTF16toUTF8(aMeta.messageName()).get()));
     67    return;
     68  }
     69 
     70  UniquePtr<ClonedMessageData> stackData;
     71  if (aStack) {
     72    stackData = MakeUnique<ClonedMessageData>();
     73    if (!aStack->BuildClonedMessageData(*stackData)) {
     74      stackData.reset();
     75    }
     76  }
     77 
     78  if (NS_WARN_IF(!contentParent->SendRawMessage(aMeta, aData, stackData))) {
     79    aRv.ThrowOperationError(
     80        nsPrintfCString("JSProcessActorParent send error in actor '%s'",
     81                        PromiseFlatCString(aMeta.actorName()).get()));
     82    return;
     83  }
     84 }
     85 
     86 void JSProcessActorParent::ClearManager() { mManager = nullptr; }
     87 
     88 }  // namespace mozilla::dom