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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef ProfilerParent_h
#define ProfilerParent_h
#include "mozilla/PProfilerParent.h"
#include "mozilla/RefPtr.h"
class nsIProfilerStartParams;
namespace mozilla {
class ProfileBufferGlobalController;
class ProfilerParentTracker;
// This is the main process side of the PProfiler protocol.
// ProfilerParent instances only exist on the main thread of the main process.
// The other side (ProfilerChild) lives on a background thread in the other
// process.
// The creation of PProfiler actors is initiated from the main process, after
// the other process has been launched.
// ProfilerParent instances are destroyed once the message channel closes,
// which can be triggered by either process, depending on which one shuts down
// first.
// All ProfilerParent instances are registered with a manager class called
// ProfilerParentTracker, which has the list of living ProfilerParent instances
// and handles shutdown.
class ProfilerParent final : public PProfilerParent {
public:
NS_INLINE_DECL_REFCOUNTING(ProfilerParent)
static mozilla::ipc::Endpoint<PProfilerChild> CreateForProcess(
base::ProcessId aOtherPid);
typedef MozPromise<Shmem, ResponseRejectReason, true>
SingleProcessProfilePromise;
// The following static methods can be called on any thread, but they are
// no-ops on anything other than the main thread.
// If called on the main thread, the call will be broadcast to all
// registered processes (all processes for which we have a ProfilerParent
// object).
// At the moment, the main process always calls these methods on the main
// thread, and that's the only process in which we need to forward these
// calls to other processes. The other processes will call these methods on
// the ProfilerChild background thread, but those processes don't need to
// forward these calls any further.
// Returns the number of profiles to expect. The gathered profiles will be
// provided asynchronously with a call to
// ProfileGatherer::ReceiveGatheredProfile.
static nsTArray<RefPtr<SingleProcessProfilePromise>> GatherProfiles();
static void ProfilerStarted(nsIProfilerStartParams* aParams);
static void ProfilerWillStopIfStarted();
static void ProfilerStopped();
static void ProfilerPaused();
static void ProfilerResumed();
static void ProfilerPausedSampling();
static void ProfilerResumedSampling();
static void ClearAllPages();
// Create a "Final" update that the Child can return to its Parent.
static ProfileBufferChunkManagerUpdate MakeFinalUpdate();
// True if the ProfilerParent holds a lock on this thread.
static bool IsLockedOnCurrentThread();
private:
friend class ProfileBufferGlobalController;
friend class ProfilerParentTracker;
explicit ProfilerParent(base::ProcessId aChildPid);
virtual ~ProfilerParent();
void Init();
void ActorDestroy(ActorDestroyReason aActorDestroyReason) override;
void ActorDealloc() override;
void RequestChunkManagerUpdate();
RefPtr<ProfilerParent> mSelfRef;
base::ProcessId mChildPid;
nsTArray<MozPromiseHolder<SingleProcessProfilePromise>>
mPendingRequestedProfiles;
bool mDestroyed;
};
} // namespace mozilla
#endif // ProfilerParent_h
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