Nika Layzell
c51090b135
Replace bare remote type strings in C++ process-selection plumbing with a RemoteType type which stores the parsed kind, isolation URI, and process selection attributes directly. This preserves the existing serialized string form for IPC and JS-facing APIs, while making native callers use explicit predicates and structured fields instead of manually parsing remote type prefixes and suffixes. No JS-exposed API for parsing or otherwise interpreting remote types are currently exposed in this patch. My current expectation is that this will likely look like a `nsIRemoteType` interface which wraps this `RemoteType` value type, exposing helpful getters for JS callers. Differential Revision: https://phabricator.services.mozilla.com/D310442
138 lines
4.5 KiB
C++
138 lines
4.5 KiB
C++
/* 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/JSProcessActorProtocol.h"
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#include "JSActorProtocolUtils.h"
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#include "mozilla/dom/ContentChild.h"
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#include "mozilla/dom/ContentParent.h"
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#include "mozilla/dom/InProcessChild.h"
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#include "mozilla/dom/JSActorBinding.h"
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#include "mozilla/dom/JSProcessActorBinding.h"
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#include "mozilla/dom/PContent.h"
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#include "nsContentUtils.h"
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namespace mozilla::dom {
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NS_IMPL_CYCLE_COLLECTING_ADDREF(JSProcessActorProtocol)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(JSProcessActorProtocol)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSProcessActorProtocol)
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NS_INTERFACE_MAP_ENTRY(nsIObserver)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION(JSProcessActorProtocol)
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/* static */ already_AddRefed<JSProcessActorProtocol>
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JSProcessActorProtocol::FromIPC(const JSProcessActorInfo& aInfo) {
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MOZ_DIAGNOSTIC_ASSERT(XRE_IsContentProcess());
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RefPtr<JSProcessActorProtocol> proto =
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new JSProcessActorProtocol(aInfo.name());
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JSActorProtocolUtils::FromIPCShared(proto, aInfo);
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// Content processes aren't the parent process, so this flag is irrelevant and
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// not propagated.
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proto->mIncludeParent = false;
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return proto.forget();
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}
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JSProcessActorInfo JSProcessActorProtocol::ToIPC() {
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MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
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JSProcessActorInfo info;
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JSActorProtocolUtils::ToIPCShared(info, this);
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return info;
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}
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already_AddRefed<JSProcessActorProtocol>
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JSProcessActorProtocol::FromWebIDLOptions(const nsACString& aName,
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const ProcessActorOptions& aOptions,
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ErrorResult& aRv) {
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MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
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RefPtr<JSProcessActorProtocol> proto = new JSProcessActorProtocol(aName);
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if (!JSActorProtocolUtils::FromWebIDLOptionsShared(proto, aOptions, aRv)) {
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return nullptr;
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}
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proto->mIncludeParent = aOptions.mIncludeParent;
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proto->mLoadInDevToolsLoader = aOptions.mLoadInDevToolsLoader;
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return proto.forget();
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}
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NS_IMETHODIMP JSProcessActorProtocol::Observe(nsISupports* aSubject,
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const char* aTopic,
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const char16_t* aData) {
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MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
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RefPtr<JSActorManager> manager;
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if (XRE_IsParentProcess()) {
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manager = InProcessChild::Singleton();
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} else {
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manager = ContentChild::GetSingleton();
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}
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// Ensure our actor is present.
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AutoJSAPI jsapi;
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jsapi.Init();
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RefPtr<JSActor> actor = manager->GetActor(jsapi.cx(), mName, IgnoreErrors());
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if (!actor || NS_WARN_IF(!actor->GetWrapperPreserveColor())) {
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return NS_OK;
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}
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// Build a observer callback.
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JS::Rooted<JSObject*> global(jsapi.cx(),
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JS::GetNonCCWObjectGlobal(actor->GetWrapper()));
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RefPtr<MozObserverCallback> observerCallback =
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new MozObserverCallback(actor->GetWrapper(), global, nullptr, nullptr);
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observerCallback->Observe(aSubject, nsDependentCString(aTopic),
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aData ? nsDependentString(aData) : VoidString());
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return NS_OK;
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}
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void JSProcessActorProtocol::AddObservers() {
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nsCOMPtr<nsIObserverService> os = services::GetObserverService();
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for (auto& topic : mChild.mObservers) {
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// This makes the observer service hold an owning reference to the
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// JSProcessActorProtocol. The JSWindowActorProtocol objects will be living
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// for the full lifetime of the content process, thus the extra strong
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// referencec doesn't have a negative impact.
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os->AddObserver(this, topic.get(), false);
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}
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}
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void JSProcessActorProtocol::RemoveObservers() {
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nsCOMPtr<nsIObserverService> os = services::GetObserverService();
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for (auto& topic : mChild.mObservers) {
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os->RemoveObserver(this, topic.get());
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}
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}
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bool JSProcessActorProtocol::Matches(const RemoteType& aRemoteType,
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ErrorResult& aRv) {
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if (!mIncludeParent && aRemoteType.IsNotRemote()) {
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aRv.ThrowNotSupportedError(nsPrintfCString(
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"Process protocol '%s' doesn't match the parent process", mName.get()));
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return false;
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}
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if (!RemoteTypeMatches(aRemoteType)) {
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aRv.ThrowNotSupportedError(nsPrintfCString(
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"Process protocol '%s' doesn't support remote type '%s'", mName.get(),
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aRemoteType.Stringify().get()));
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return false;
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}
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LogMatch(aRemoteType);
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return true;
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}
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} // namespace mozilla::dom
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