f902b9dd8d
Bug: v8:8179 Change-Id: I0cd43db6558db616690de2dd012bf7518c49345d Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2138563 Commit-Queue: Shu-yu Guo <syg@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Cr-Commit-Position: refs/heads/master@{#67069}
49 lines
1.4 KiB
JavaScript
49 lines
1.4 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: --harmony-weak-refs --expose-gc --noincremental-marking
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let cleanup_call_count = 0;
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let cleanup_holdings_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_holdings_count;
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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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gc();
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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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assertEquals(1, cleanup_holdings_count);
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}
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setTimeout(timeout_func, 0);
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