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>
34 lines
1.2 KiB
JavaScript
34 lines
1.2 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 wr;
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(function () {
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let o = {};
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wr = new WeakRef(o);
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// Don't deref here, we want to test that the creation is enough to keep the
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// WeakRef alive until the end of the turn.
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})();
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// Here we invoke GC synchronously and, with conservative stack scanning,
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// there is a chance that the object is not reclaimed now. In any case,
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// the WeakRef should not be cleared.
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gc();
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// Since the WeakRef was created during this turn, it is not cleared by GC.
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assertNotEquals(undefined, wr.deref());
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// Next task.
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setTimeout(() => {
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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, wr.deref());
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})();
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}, 0);
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