зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
2.2 KiB
C++
72 строки
2.2 KiB
C++
/* -*- 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 mozilla_recordreplay_Lock_h
|
|
#define mozilla_recordreplay_Lock_h
|
|
|
|
#include "mozilla/PodOperations.h"
|
|
#include "mozilla/Types.h"
|
|
|
|
#include "File.h"
|
|
|
|
namespace mozilla {
|
|
namespace recordreplay {
|
|
|
|
// Recorded Locks Overview.
|
|
//
|
|
// Each platform has some types used for native locks (e.g. pthread_mutex_t or
|
|
// CRITICAL_SECTION). System APIs which operate on these native locks are
|
|
// redirected so that lock behavior can be tracked. If a native lock is
|
|
// created when thread events are not passed through then that native lock is
|
|
// recorded, and lock acquire orders will be replayed in the same order with
|
|
// which they originally occurred.
|
|
|
|
// Information about a recorded lock.
|
|
class Lock
|
|
{
|
|
// Unique ID for this lock.
|
|
size_t mId;
|
|
|
|
public:
|
|
explicit Lock(size_t aId)
|
|
: mId(aId)
|
|
{
|
|
MOZ_ASSERT(aId);
|
|
}
|
|
|
|
size_t Id() { return mId; }
|
|
|
|
// When recording, this is called after the lock has been acquired, and
|
|
// records the acquire in the lock's acquire order stream. When replaying,
|
|
// this is called before the lock has been acquired, and blocks the thread
|
|
// until it is next in line to acquire the lock.
|
|
void Enter();
|
|
|
|
// This is called before releasing the lock, allowing the next owner to
|
|
// acquire it while replaying.
|
|
void Exit();
|
|
|
|
// Create a new Lock corresponding to a native lock, with a fresh ID.
|
|
static void New(void* aNativeLock);
|
|
|
|
// Destroy any Lock associated with a native lock.
|
|
static void Destroy(void* aNativeLock);
|
|
|
|
// Get the recorded Lock for a native lock if there is one, otherwise null.
|
|
static Lock* Find(void* aNativeLock);
|
|
|
|
// Initialize locking state.
|
|
static void InitializeLocks();
|
|
|
|
// Note that new data has been read into a lock's acquires stream.
|
|
static void LockAquiresUpdated(size_t aLockId);
|
|
};
|
|
|
|
} // namespace recordreplay
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_recordreplay_Lock_h
|