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33 lines
815 B
JavaScript
33 lines
815 B
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: --harmony-weak-refs --expose-gc --noincremental-marking
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let cleanup_count = 0;
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let cleanup_holdings = [];
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let cleanup = function(iter) {
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for (holdings of iter) {
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cleanup_holdings.push(holdings);
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}
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++cleanup_count;
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}
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let fg = new FinalizationGroup(cleanup);
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(function() {
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let o = {};
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fg.register(o, "holdings");
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// cleanupSome won't do anything since there are no reclaimed targets.
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fg.cleanupSome();
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assertEquals(0, cleanup_count);
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})();
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// GC will detect o as dead.
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gc();
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fg.cleanupSome();
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assertEquals(1, cleanup_count);
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assertEquals(1, cleanup_holdings.length);
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assertEquals("holdings", cleanup_holdings[0]);
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