blob: 6392a23fe8bbceea59316b826f8d3e397f5cee20 [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_called = false;
let cleanup = function(holdings) {
let holdings_list = [];
holdings_list.push(holdings);
assertEquals(1, holdings_list.length);
assertEquals("holdings", holdings_list[0]);
cleanup_called = true;
}
let fg = new FinalizationRegistry(cleanup);
let weak_refs = [];
(function() {
for (let i = 0; i < 1000; ++i) {
let o = {};
weak_refs.push(new WeakRef(o));
fg.register(o, "holdings");
}
})();
// Since the WeakRef was created during this turn, it is not cleared by GC. The
// pointer inside the FinalizationRegistry is not cleared either, since the WeakRef
// keeps the target object alive.
gc();
(function() {
weak_refs.forEach((weak_ref) => assertEquals("object", typeof(weak_ref.deref())));
})();
// Trigger gc in next task
setTimeout(() => {
gc();
// Check that cleanup callback was called in a follow up task
setTimeout(() => {
assertTrue(cleanup_called);
assertTrue(weak_refs.some((weak_ref) => weak_ref.deref() === null));
}, 0);
}, 0);