forked from mirrors/gecko-dev
4d890942b8
Top-level actor can only be bound to one process, we can't reuse the existing one to bind to a different process. So if the utility process crashes and we've created a new one as a replacement, we need to have a new JSOracleParent for the connection, using the old one won't work. This patch creates a new one upon the destruction of the existing one if the reason for the destruction is AbnormalShutdown. Differential Revision: https://phabricator.services.mozilla.com/D168482
81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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/JSOracleParent.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/dom/PJSOracle.h"
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#include "mozilla/ipc/Endpoint.h"
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#include "mozilla/ipc/UtilityProcessManager.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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static StaticRefPtr<JSOracleParent> sOracleSingleton;
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/* static */
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void JSOracleParent::WithJSOracle(
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const std::function<void(JSOracleParent* aParent)>& aCallback) {
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GetSingleton()->StartJSOracle()->Then(
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GetMainThreadSerialEventTarget(), __func__,
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[aCallback](const JSOraclePromise::ResolveOrRejectValue& aResult) {
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aCallback(aResult.IsReject() || !aResult.ResolveValue()
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? nullptr
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: GetSingleton());
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});
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}
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void JSOracleParent::ActorDestroy(ActorDestroyReason aReason) {
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// Given an actor can only be bound to one process,
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// if the utility process crashes and we create a new one,
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// we can't reuse the same JSOracleParent instance for it,
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// so we always create a new JSOracleParent to replace
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// the existing one.
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if (aReason == ActorDestroyReason::AbnormalShutdown) {
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sOracleSingleton = new JSOracleParent();
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}
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}
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/* static */
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JSOracleParent* JSOracleParent::GetSingleton() {
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if (!sOracleSingleton) {
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sOracleSingleton = new JSOracleParent();
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ClearOnShutdown(&sOracleSingleton);
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}
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return sOracleSingleton;
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}
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RefPtr<JSOracleParent::JSOraclePromise> JSOracleParent::StartJSOracle() {
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using namespace mozilla::ipc;
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RefPtr<JSOracleParent> parent = JSOracleParent::GetSingleton();
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return UtilityProcessManager::GetSingleton()->StartJSOracle(parent);
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}
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nsresult JSOracleParent::BindToUtilityProcess(
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const RefPtr<mozilla::ipc::UtilityProcessParent>& aUtilityParent) {
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Endpoint<PJSOracleParent> parentEnd;
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Endpoint<PJSOracleChild> childEnd;
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MOZ_ASSERT(aUtilityParent);
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if (NS_FAILED(PJSOracle::CreateEndpoints(base::GetCurrentProcId(),
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aUtilityParent->OtherPid(),
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&parentEnd, &childEnd))) {
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return NS_ERROR_FAILURE;
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}
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if (!aUtilityParent->SendStartJSOracleService(std::move(childEnd))) {
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return NS_ERROR_FAILURE;
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}
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Bind(std::move(parentEnd));
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return NS_OK;
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}
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void JSOracleParent::Bind(Endpoint<PJSOracleParent>&& aEndpoint) {
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DebugOnly<bool> ok = aEndpoint.Bind(this);
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MOZ_ASSERT(ok);
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}
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