blob: 08a9fbf34d6eb86d41b221decd3678a8594a1a7c [file] [log] [blame]
// 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 --expose-gc --noincremental-marking
load("./resources/v8-mjsunit.js", "caller relative");
let cleanup_call_count = 0;
let cleanup = function(holdings) {
assertEquals("holdings", holdings);
++cleanup_call_count;
}
let fg = new FinalizationRegistry(cleanup);
let key = {"k": "this is the key"};
// Create an object and register it in the FinalizationRegistry. The object needs
// to be inside a closure so that we can reliably kill them!
(function() {
for (let i = 0; i < 1000; ++i) {
let object = {};
fg.register(object, "holdings", key);
}
})();
// This GC will reclaim the target object and schedule cleanup.
gc();
assertEquals(0, cleanup_call_count);
// Assert that the cleanup function was called.
let timeout_func = function() {
assertNotEquals(0, cleanup_call_count);
let old_cleanup_call_count = cleanup_call_count;
// Unregister an already cleaned-up weak reference.
let success = fg.unregister(key);
// Since we may not collect everything we don't know what success will be unlike v8.
// assertFalse(success);
// Assert that it didn't do anything.
setTimeout(() => { assertEquals(old_cleanup_call_count, cleanup_call_count); }, 0);
}
setTimeout(timeout_func, 0);