mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 20:42:43 +00:00
c364520c24
This patch adds a `-z` option to js and test-js. When run in this mode, garbage cells are never actually destroyed. We instead keep them around in a special zombie state. This allows us to validate that zombies don't get marked in future GC scans (since there were not supposed to be any more references!) :^) Cells get notified when they become a zombie (via did_become_zombie()) and this is used by WeakContainer cells to deregister themselves from the heap.
38 lines
902 B
C++
38 lines
902 B
C++
/*
|
|
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/HashTable.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
#include <LibJS/Runtime/Object.h>
|
|
#include <LibJS/Runtime/WeakContainer.h>
|
|
|
|
namespace JS {
|
|
|
|
class WeakSet final
|
|
: public Object
|
|
, public WeakContainer {
|
|
JS_OBJECT(WeakSet, Object);
|
|
|
|
public:
|
|
static WeakSet* create(GlobalObject&);
|
|
|
|
explicit WeakSet(Object& prototype);
|
|
virtual ~WeakSet() override;
|
|
|
|
HashTable<Cell*> const& values() const { return m_values; };
|
|
HashTable<Cell*>& values() { return m_values; };
|
|
|
|
virtual void remove_swept_cells(Badge<Heap>, Span<Cell*>) override;
|
|
|
|
private:
|
|
virtual void did_become_zombie() override { deregister(); }
|
|
|
|
HashTable<Cell*> m_values; // This stores Cell pointers instead of Object pointers to aide with sweeping
|
|
};
|
|
|
|
}
|