forked from LeenkxTeam/Kmake
54 lines
1.6 KiB
JavaScript
54 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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(async function () {
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let cleanup_call_count = 0;
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let cleanup = function(holdings) {
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// See which target we're cleaning up and unregister the other one.
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if (holdings == 1) {
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let success = fg.unregister(key2);
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assertTrue(success);
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} else {
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assertSame(holdings, 2);
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let success = fg.unregister(key1);
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assertTrue(success);
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}
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++cleanup_call_count;
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}
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let fg = new FinalizationRegistry(cleanup);
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let key1 = {"k": "first key"};
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let key2 = {"k": "second key"};
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// Create two objects and register them in the FinalizationRegistry. The objects
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// need to be inside a closure so that we can reliably kill them!
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(function() {
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let object1 = {};
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fg.register(object1, 1, key1);
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let object2 = {};
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fg.register(object2, 2, key2);
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// object1 and object2 go out of scope.
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})();
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// This GC will reclaim target objects 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 and cleaned up one holdings (but not the other one).
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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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