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>
55 lines
1.6 KiB
JavaScript
55 lines
1.6 KiB
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --expose-gc --noincremental-marking
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let o1 = {};
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let o2 = {};
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let wr1;
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let wr2;
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(function() {
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wr1 = new WeakRef(o1);
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wr2 = new WeakRef(o2);
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})();
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// Since the WeakRefs were created during this turn, they're not cleared by GC.
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// Here and below, we invoke GC synchronously and, with conservative stack
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// scanning, there is a chance that the object is not reclaimed now. In any
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// case, the WeakRef should not be cleared.
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gc();
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(function() {
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assertNotEquals(undefined, wr1.deref());
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assertNotEquals(undefined, wr2.deref());
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})();
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// New task
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setTimeout(function() {
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(function () { wr1.deref(); })();
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o1 = null;
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gc(); // deref makes sure we don't clean up wr1
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(function () { assertNotEquals(undefined, wr1.deref()); })();
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// New task
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setTimeout(function() {
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(function () { wr2.deref(); })();
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o2 = null;
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gc(); // deref makes sure we don't clean up wr2
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(function () { assertNotEquals(undefined, wr2.deref()); })();
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// New task
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(async function () {
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// Trigger GC again to make sure the two WeakRefs are cleared.
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// We need to invoke GC asynchronously and wait for it to finish, so that
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// it doesn't need to scan the stack. Otherwise, the objects may not be
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// reclaimed because of conservative stack scanning and the test may not
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// work as intended.
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await gc({ type: 'major', execution: 'async' });
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assertEquals(undefined, wr1.deref());
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assertEquals(undefined, wr2.deref());
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})();
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}, 0);
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}, 0);
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