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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: --harmony-weak-refs --expose-gc --noincremental-marking --allow-natives-syntax
let cleanup_called = false;
let cleanup = function(iter) {
assertFalse(cleanup_called);
let cells = [];
for (wc of iter) {
cells.push(wc);
}
assertEquals(1, cells.length);
assertEquals(weak_cell, cells[0]);
cleanup_called = true;
}
let wf = new WeakFactory(cleanup);
let weak_ref;
let weak_cell;
(function() {
let o = {};
weak_ref = new WeakRef(o);
weak_cell = wf.makeCell(o);
})();
// Since the WeakRef was created during this turn, it is not cleared by GC. The
// WeakCell is not cleared either, since the WeakRef keeps the target object
// alive.
gc();
(function() {
assertNotEquals(undefined, weak_ref.deref());
})();
%PerformMicrotaskCheckpoint();
// Next turn.
gc();
%PerformMicrotaskCheckpoint();
// Next turn.
assertTrue(cleanup_called);
assertEquals(undefined, weak_ref.deref());
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