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deps/v8/test/mjsunit/weakrefs/multiple-dirty-finalization-groups.js
45 строк
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Michaël Zasso
deps: update V8 to 14.2.231.9
23 окт 2025, 08:36
Не верифицирован
23 окт 2025, 08:36
c2843b7
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// Copyright 2018 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Flags: --expose-gc --noincremental-marking (async function () { let cleanup_call_count = 0; let cleanup = function (holdings) { ++cleanup_call_count; } let fg1 = new FinalizationRegistry(cleanup); let fg2 = new FinalizationRegistry(cleanup); // Create two objects and register them in FinalizationRegistries. The objects need // to be inside a closure so that we can reliably kill them! (function () { let object1 = {}; fg1.register(object1, "holdings1"); let object2 = {}; fg2.register(object2, "holdings2"); // object1 and object2 go out of scope. })(); // This GC will discover dirty WeakCells and schedule cleanup. // We need to invoke GC asynchronously and wait for it to finish, so that // it doesn't need to scan the stack. Otherwise, the objects may not be // reclaimed because of conservative stack scanning and the test may not // work as intended. await gc({ type: 'major', execution: 'async' }); assertEquals(0, cleanup_call_count); // Wait two ticks, so that the finalization registry cleanup has an // opportunity to both run and re-post itself. await new Promise(resolve=>setTimeout(resolve, 0)); await new Promise(resolve=>setTimeout(resolve, 0)); // Assert that the cleanup function was called. assertEquals(2, cleanup_call_count); })();