50 lines
1.4 KiB
JavaScript
50 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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load("./resources/v8-mjsunit.js", "caller relative");
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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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assertEquals(holdings, "holdings");
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// There's mores object with the same key that we haven't
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// cleaned up yet so we should be able to unregister the
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// callback for that one.
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let success = fg.unregister(key);
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assertTrue(success);
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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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// Create an object and register it in the FinalizationRegistry. The object needs to be inside
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// a closure so that we can reliably kill them!
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let key = {"k": "this is the key"};
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(function() {
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for (let i = 0; i < 1000; ++i) {
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let object = {};
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let object2 = {};
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fg.register(object, "holdings", key);
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fg.register(object2, "holdings", key);
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}
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})();
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// This GC will discover dirty WeakCells 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.
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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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