зеркало из https://github.com/mozilla/gecko-dev.git
124 строки
3.7 KiB
C++
124 строки
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/ProcessActor.h"
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#include "nsContentUtils.h"
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#include "mozJSComponentLoader.h"
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#include "mozilla/ContentBlockingAllowList.h"
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#include "mozilla/Logging.h"
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#include "mozilla/dom/JSActorService.h"
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#include "mozilla/dom/JSProcessActorParent.h"
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#include "mozilla/dom/JSProcessActorChild.h"
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namespace mozilla {
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namespace dom {
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void ProcessActor::ConstructActor(const nsACString& aName,
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JS::MutableHandleObject aActor,
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ErrorResult& aRv) {
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MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
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JSActor::Type actorType = GetSide();
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MOZ_ASSERT_IF(actorType == JSActor::Type::Parent, XRE_IsParentProcess());
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// Constructing an actor requires a running script, so push an AutoEntryScript
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// onto the stack.
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AutoEntryScript aes(xpc::PrivilegedJunkScope(), "ProcessActor construction");
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JSContext* cx = aes.cx();
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RefPtr<JSActorService> actorSvc = JSActorService::GetSingleton();
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if (!actorSvc) {
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aRv.ThrowInvalidStateError(
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"While constructing JSProcessActor, could not acquire JSActorService.");
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return;
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}
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RefPtr<JSProcessActorProtocol> proto =
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actorSvc->GetJSProcessActorProtocol(aName);
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if (!proto) {
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aRv.ThrowNotFoundError(nsPrintfCString("No such JSProcessActor '%s'",
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PromiseFlatCString(aName).get()));
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return;
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}
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if (!proto->Matches(GetRemoteType())) {
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aRv.ThrowTypeMismatchError(
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nsPrintfCString("JSProcessActor '%s' does not match this process",
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PromiseFlatCString(aName).get()));
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return;
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}
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// Load the module using mozJSComponentLoader.
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RefPtr<mozJSComponentLoader> loader = mozJSComponentLoader::Get();
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MOZ_ASSERT(loader);
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JS::RootedObject global(cx);
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JS::RootedObject exports(cx);
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const JSProcessActorProtocol::Sided* side;
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if (actorType == JSActor::Type::Parent) {
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side = &proto->Parent();
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} else {
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side = &proto->Child();
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}
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// Support basic functionally such as SendAsyncMessage and SendQuery for
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// unspecified moduleURI.
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if (!side->mModuleURI) {
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RefPtr<JSActor> actor;
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if (actorType == JSActor::Type::Parent) {
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actor = new JSProcessActorParent();
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} else {
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actor = new JSProcessActorChild();
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}
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JS::Rooted<JS::Value> wrapper(cx);
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if (!ToJSValue(cx, actor, &wrapper)) {
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aRv.NoteJSContextException(cx);
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return;
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}
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MOZ_ASSERT(wrapper.isObject());
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aActor.set(&wrapper.toObject());
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return;
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}
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aRv = loader->Import(cx, side->mModuleURI.ref(), &global, &exports);
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if (aRv.Failed()) {
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return;
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}
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MOZ_ASSERT(exports, "null exports!");
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// Load the specific property from our module.
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JS::RootedValue ctor(cx);
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nsAutoCString ctorName(aName);
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ctorName.Append(actorType == JSActor::Type::Parent
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? NS_LITERAL_CSTRING("Parent")
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: NS_LITERAL_CSTRING("Child"));
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if (!JS_GetProperty(cx, exports, ctorName.get(), &ctor)) {
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aRv.NoteJSContextException(cx);
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return;
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}
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if (NS_WARN_IF(!ctor.isObject())) {
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nsPrintfCString message("Could not find actor constructor '%s'",
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PromiseFlatCString(ctorName).get());
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aRv.ThrowNotFoundError(message);
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return;
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}
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// Invoke the constructor loaded from the module.
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if (!JS::Construct(cx, ctor, JS::HandleValueArray::empty(), aActor)) {
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aRv.NoteJSContextException(cx);
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return;
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}
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}
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} // namespace dom
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} // namespace mozilla
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