f226350fcb
PR-URL: https://github.com/nodejs/node/pull/47251 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Richard Lau <rlau@redhat.com>
48 lines
1.5 KiB
JavaScript
48 lines
1.5 KiB
JavaScript
// 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: --expose-gc --noincremental-marking
|
|
|
|
(async function () {
|
|
|
|
let cleanup_called = false;
|
|
let cleanup = function(holdings_arg) {
|
|
assertFalse(cleanup_called);
|
|
assertEquals(holdings_arg, holdings);
|
|
cleanup_called = true;
|
|
}
|
|
|
|
let fg = new FinalizationRegistry(cleanup);
|
|
let o = {};
|
|
let holdings = {'h': 55};
|
|
|
|
// Ignition holds references to objects in temporary registers. These will be
|
|
// released when the function exits. So only access o inside a function to
|
|
// prevent any references to objects in temporary registers when a gc is
|
|
// triggered.
|
|
(() => { fg.register(o, holdings); })()
|
|
|
|
// Here and below, we need to invoke GC asynchronously and wait for it to
|
|
// finish, so that it doesn't need to scan the stack. Otherwise, the objects
|
|
// may not be reclaimed because of conservative stack scanning and the test
|
|
// may not work as intended.
|
|
await gc({ type: 'major', execution: 'async' });
|
|
assertFalse(cleanup_called);
|
|
|
|
// Drop the last reference to o.
|
|
(() => { o = null; })()
|
|
|
|
// GC will clear the WeakCell; the cleanup function will be called the next time
|
|
// we enter the event loop.
|
|
await gc({ type: 'major', execution: 'async' });
|
|
assertFalse(cleanup_called);
|
|
|
|
let timeout_func = function() {
|
|
assertTrue(cleanup_called);
|
|
}
|
|
|
|
setTimeout(timeout_func, 0);
|
|
|
|
})();
|