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}
52 lines
1.3 KiB
JavaScript
52 lines
1.3 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_called = 0;
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let holdings_list = [];
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let cleanup = function(holdings) {
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holdings_list.push(holdings);
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cleanup_called++;
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}
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let fg = new FinalizationRegistry(cleanup);
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let o1 = {};
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let o2 = {};
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// Ignition holds references to objects in temporary registers. These will be
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// released when the function exits. So only access o inside a function to
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// prevent any references to objects in temporary registers when a gc is
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(function() {
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fg.register(o1, 1);
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fg.register(o2, 2);
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})();
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gc();
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assertEquals(cleanup_called, 0);
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// Drop the last references to o1 and o2.
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(function() {
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o1 = null;
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o2 = null;
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})();
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// GC will reclaim the target objects; the cleanup function will be called the
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// next time we enter the event loop.
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gc();
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assertEquals(cleanup_called, 0);
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let timeout_func = function() {
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assertEquals(cleanup_called, 2);
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assertEquals(holdings_list.length, 2);
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if (holdings_list[0] == 1) {
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assertEquals(holdings_list[1], 2);
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} else {
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assertEquals(holdings_list[0], 2);
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assertEquals(holdings_list[1], 1);
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}
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}
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setTimeout(timeout_func, 0);
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