forked from LeenkxTeam/Kmake
46 lines
1.3 KiB
JavaScript
46 lines
1.3 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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(async function () {
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let cleanup_call_count = 0;
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let cleanup = function (holdings) {
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assertEquals(holdings, "holdings");
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let success = fg.unregister(key);
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assertFalse(success);
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++cleanup_call_count;
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}
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let fg = new FinalizationRegistry(cleanup);
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// Create an object and register it in the FinalizationRegistry. The object needs to be inside
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// a closure so that we can reliably kill them!
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let key = { "k": "this is the key" };
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(function () {
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let object = {};
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fg.register(object, "holdings", key);
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// object goes out of scope.
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})();
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// This GC will discover dirty WeakCells and schedule cleanup.
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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(0, cleanup_call_count);
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// Assert that the cleanup function was called.
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let timeout_func = function () {
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assertEquals(1, cleanup_call_count);
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}
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setTimeout(timeout_func, 0);
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})();
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