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bcff2dd108
In order to enable asynchronous launch, destruction of GeckoChildProcessHost (and its subclasses) has to be delayed until after launching (or anything else that might be made asynchronous in the future) has completed, to prevent use-after-free. However, there are other dependencies on process hosts always being destroyed on the I/O thread, so refcounting would be difficult to use. Instead, GeckoChildProcessHost now may not be destroyed directly, but must go through a method that handles the scheduling. There are also some minor cleanups to the affected headers (removed duplicate access modifiers, and made PluginProcessParent final). Depends on D18010 Differential Revision: https://phabricator.services.mozilla.com/D18011 --HG-- extra : moz-landing-system : lando
130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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#ifndef mozilla_net_SocketProcessHost_h
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#define mozilla_net_SocketProcessHost_h
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#include "mozilla/UniquePtr.h"
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#include "mozilla/ipc/GeckoChildProcessHost.h"
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#include "mozilla/MemoryReportingProcess.h"
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#include "mozilla/ipc/TaskFactory.h"
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namespace mozilla {
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namespace net {
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class OfflineObserver;
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class SocketProcessParent;
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// SocketProcessHost is the "parent process" container for a subprocess handle
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// and IPC connection. It owns the parent process IPDL actor, which in this
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// case, is a SocketProcessParent.
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// SocketProcessHost is allocated and managed by nsIOService in parent process.
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class SocketProcessHost final : public mozilla::ipc::GeckoChildProcessHost {
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friend class SocketProcessParent;
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public:
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class Listener {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(Listener)
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// Called when the process of launching the process is complete.
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virtual void OnProcessLaunchComplete(SocketProcessHost* aHost,
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bool aSucceeded) = 0;
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// Called when the channel is closed but Shutdown() is not invoked.
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virtual void OnProcessUnexpectedShutdown(SocketProcessHost* aHost) = 0;
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protected:
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virtual ~Listener() = default;
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};
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explicit SocketProcessHost(Listener* listener);
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// Launch the socket process asynchronously.
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// The OnProcessLaunchComplete listener callback will be invoked
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// either when a connection has been established, or if a connection
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// could not be established due to an asynchronous error.
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bool Launch();
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// Inform the socket process that it should clean up its resources and shut
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// down. This initiates an asynchronous shutdown sequence. After this method
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// returns, it is safe for the caller to forget its pointer to the
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// SocketProcessHost.
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void Shutdown();
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// Return the actor for the top-level actor of the process. Return null if
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// the process is not connected.
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SocketProcessParent* GetActor() const {
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MOZ_ASSERT(NS_IsMainThread());
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return mSocketProcessParent.get();
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}
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bool IsConnected() const {
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MOZ_ASSERT(NS_IsMainThread());
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return !!mSocketProcessParent;
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}
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// Called on the IO thread.
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void OnChannelConnected(int32_t peer_pid) override;
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void OnChannelError() override;
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private:
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~SocketProcessHost();
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// Called on the main thread.
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void OnChannelConnectedTask();
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void OnChannelErrorTask();
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// Called on the main thread after a connection has been established.
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void InitAfterConnect(bool aSucceeded);
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// Called on the main thread when the mSocketParent actor is shutting down.
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void OnChannelClosed();
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void DestroyProcess();
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DISALLOW_COPY_AND_ASSIGN(SocketProcessHost);
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RefPtr<Listener> mListener;
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mozilla::ipc::TaskFactory<SocketProcessHost> mTaskFactory;
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enum class LaunchPhase { Unlaunched, Waiting, Complete };
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LaunchPhase mLaunchPhase;
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UniquePtr<SocketProcessParent> mSocketProcessParent;
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// mShutdownRequested is set to true only when Shutdown() is called.
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// If mShutdownRequested is false and the IPC channel is closed,
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// OnProcessUnexpectedShutdown will be invoked.
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bool mShutdownRequested;
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bool mChannelClosed;
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RefPtr<OfflineObserver> mOfflineObserver;
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};
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class SocketProcessMemoryReporter : public MemoryReportingProcess {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SocketProcessMemoryReporter, override)
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SocketProcessMemoryReporter() = default;
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bool IsAlive() const override;
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bool SendRequestMemoryReport(const uint32_t& aGeneration,
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const bool& aAnonymize,
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const bool& aMinimizeMemoryUsage,
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const dom::MaybeFileDesc& aDMDFile) override;
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int32_t Pid() const override;
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protected:
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virtual ~SocketProcessMemoryReporter() = default;
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};
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} // namespace net
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} // namespace mozilla
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#endif // mozilla_net_SocketProcessHost_h
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