gecko-dev/toolkit/recordreplay/WeakPointer.cpp

64 строки
1.6 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/. */
#include "WeakPointer.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/StaticMutex.h"
#include "jsapi.h"
#include <unordered_map>
namespace mozilla {
namespace recordreplay {
typedef std::unordered_map<const void*, UniquePtr<JS::PersistentRootedObject>> WeakPointerRootMap;
static WeakPointerRootMap* gWeakPointerRootMap;
static StaticMutexNotRecorded gWeakPointerMutex;
static UniquePtr<JS::PersistentRootedObject>
NewRoot(JSObject* aJSObj)
{
MOZ_RELEASE_ASSERT(aJSObj);
JSContext* cx = dom::danger::GetJSContext();
UniquePtr<JS::PersistentRootedObject> root = MakeUnique<JS::PersistentRootedObject>(cx);
*root = aJSObj;
return root;
}
extern "C" {
MOZ_EXPORT void
RecordReplayInterface_SetWeakPointerJSRoot(const void* aPtr, JSObject* aJSObj)
{
MOZ_RELEASE_ASSERT(IsReplaying());
StaticMutexAutoLock lock(gWeakPointerMutex);
auto iter = gWeakPointerRootMap->find(aPtr);
if (iter != gWeakPointerRootMap->end()) {
if (aJSObj) {
*iter->second = aJSObj;
} else {
gWeakPointerRootMap->erase(aPtr);
}
} else if (aJSObj) {
gWeakPointerRootMap->insert(WeakPointerRootMap::value_type(aPtr, NewRoot(aJSObj)));
}
}
} // extern "C"
void
InitializeWeakPointers()
{
gWeakPointerRootMap = new WeakPointerRootMap();
}
} // namespace recordreplay
} // namespace mozilla