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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* See https://bugzilla.mozilla.org/show_bug.cgi?id=317304 */
function run_test()
{
// Bug 712649: Calling getWeakReference(null) should work.
try {
var nullWeak = Cu.getWeakReference(null);
Assert.ok(nullWeak.get() === null);
} catch (e) {
Assert.ok(false);
}
var obj = { num: 5, str: 'foo' };
var weak = Cu.getWeakReference(obj);
Assert.ok(weak.get() === obj);
Assert.ok(weak.get().num == 5);
Assert.ok(weak.get().str == 'foo');
// Force garbage collection
Cu.forceGC();
// obj still references the object, so it should still be accessible via weak
Assert.ok(weak.get() === obj);
Assert.ok(weak.get().num == 5);
Assert.ok(weak.get().str == 'foo');
// Clear obj's reference to the object and force garbage collection. To make
// sure that there are no instances of obj stored in the registers or on the
// native stack and the conservative GC would not find it we force the same
// code paths that we used for the initial allocation.
obj = { num: 6, str: 'foo2' };
var weak2 = Cu.getWeakReference(obj);
Assert.ok(weak2.get() === obj);
Cu.forceGC();
// The object should have been garbage collected and so should no longer be
// accessible via weak
Assert.ok(weak.get() === null);
}
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