| // Copyright 2018 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Flags: --harmony-weak-refs-with-cleanup-some --expose-gc --noincremental-marking |
| |
| let cleanup_count = 0; |
| let cleanup_holdings = []; |
| let cleanup = function(holdings) { |
| cleanup_holdings.push(holdings); |
| ++cleanup_count; |
| } |
| |
| let fg = new FinalizationRegistry(cleanup); |
| let key = {"k": "this is the key"}; |
| (function() { |
| let o = {}; |
| weak_cell = fg.register(o, "holdings", key); |
| |
| // cleanupSome won't do anything since there are no reclaimed targets. |
| fg.cleanupSome(); |
| assertEquals(0, cleanup_count); |
| // Keep o alive to the end of the function, so that --stress-opt mode |
| // is robust towards --gc-interval timing. |
| return o; |
| })(); |
| |
| // GC will detect the WeakCell as dirty. |
| gc(); |
| |
| // Unregister the tracked object just before calling cleanupSome. |
| fg.unregister(key); |
| |
| fg.cleanupSome(); |
| |
| assertEquals(0, cleanup_count); |
