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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);
#ifdef MOZ_GECKO_PROFILER
using SingleProcessProfilePromise =
MozPromise<Shmem, ResponseRejectReason, true>;
struct SingleProcessProfilePromiseAndChildPid {
RefPtr<SingleProcessProfilePromise> profilePromise;
base::ProcessId childPid;
};
using SingleProcessProgressPromise =
MozPromise<GatherProfileProgress, ResponseRejectReason, true>;
// 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 profiles to expect, as promises and child pids.
static nsTArray<SingleProcessProfilePromiseAndChildPid> GatherProfiles();
// Send a request to get the GatherProfiles() progress update from one child
// process, returns a promise to be resolved with that progress.
// The promise RefPtr may be null if the child process is unknown.
// Progress may be invalid, if the request arrived after the child process
// had already responded to the main GatherProfile() IPC, or something went
// very wrong in that process.
static RefPtr<SingleProcessProgressPromise> RequestGatherProfileProgress(
base::ProcessId aChildPid);
// This will start the profiler in all child processes. The returned promise
// will be resolved when all child have completed their operation
// (successfully or not.)
[[nodiscard]] static RefPtr<GenericPromise> ProfilerStarted(
nsIProfilerStartParams* aParams);
static void ProfilerWillStopIfStarted();
[[nodiscard]] static RefPtr<GenericPromise> ProfilerStopped();
[[nodiscard]] static RefPtr<GenericPromise> ProfilerPaused();
[[nodiscard]] static RefPtr<GenericPromise> ProfilerResumed();
[[nodiscard]] static RefPtr<GenericPromise> ProfilerPausedSampling();
[[nodiscard]] static RefPtr<GenericPromise> ProfilerResumedSampling();
static void ClearAllPages();
[[nodiscard]] static RefPtr<GenericPromise> WaitOnePeriodicSampling();
// 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);
void Init();
void ActorDestroy(ActorDestroyReason aActorDestroyReason) override;
void ActorDealloc() override;
void RequestChunkManagerUpdate();
RefPtr<ProfilerParent> mSelfRef;
base::ProcessId mChildPid;
nsTArray<MozPromiseHolder<SingleProcessProfilePromise>>
mPendingRequestedProfiles;
bool mDestroyed;
#endif // MOZ_GECKO_PROFILER
private:
virtual ~ProfilerParent();
};
} // namespace mozilla
#endif // ProfilerParent_h