ea526196f4
This replaces WeakFactory with FinalizationGroup. New API is here: https://weakrefs.netlify.com/ BUG=v8:8179 Change-Id: I8c1c4a70deb42581d17117423dd29d93bdd35cb0 Reviewed-on: https://chromium-review.googlesource.com/c/1435938 Reviewed-by: Maya Lekova <mslekova@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org> Commit-Queue: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#59204}
45 lines
1.1 KiB
JavaScript
45 lines
1.1 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 --allow-natives-syntax
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let cleanup_called = false;
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let cleanup = function(iter) {
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assertFalse(cleanup_called);
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let holdings_list = [];
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for (holdings of iter) {
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holdings_list.push(holdings);
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}
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assertEquals(1, holdings_list.length);
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assertEquals("holdings", holdings_list[0]);
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cleanup_called = true;
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}
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let fg = new FinalizationGroup(cleanup);
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let weak_ref;
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(function() {
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let o = {};
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weak_ref = new WeakRef(o);
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fg.register(o, "holdings");
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})();
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// Since the WeakRef was created during this turn, it is not cleared by GC. The
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// pointer inside the FinalizationGroup is not cleared either, since the WeakRef
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// keeps the target object alive.
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gc();
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(function() {
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assertNotEquals(undefined, weak_ref.deref());
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})();
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%PerformMicrotaskCheckpoint();
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// Next turn.
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gc();
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%PerformMicrotaskCheckpoint();
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// Next turn.
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assertTrue(cleanup_called);
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assertEquals(undefined, weak_ref.deref());
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