gecko/js/tests/js1_5/Array/regress-360681-02.js

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is JavaScript Engine testing utilities.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s): Igor Bukanov
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
var gTestfile = 'regress-360681-02.js';
//-----------------------------------------------------------------------------
var BUGNUMBER = 360681;
var summary = 'Regression from bug 224128';
var actual = '';
var expect = '';
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
function test()
{
enterFunc ('test');
printBugNumber(BUGNUMBER);
printStatus (summary);
expect = actual = 'No Crash';
var N = 1000;
// Make an array with a hole at the end
var a = Array(N);
for (i = 0; i < N - 1; ++i)
a[i] = 1;
// array_sort due for array with N elements with allocates a temporary vector
// with 2*N. Lets create strings that on 32 and 64 bit CPU cause allocation
// of the same amount of memory + 1 word for their char arrays. After we GC
// strings with a reasonable malloc implementation that memory will be most
// likely reused in array_sort for the temporary vector. Then the bug causes
// accessing the one-beyond-the-aloocation word and re-interpretation of
// 0xFFF0FFF0 as GC thing.
var str1 = Array(2*(2*N + 1) + 1).join(String.fromCharCode(0xFFF0));
var str2 = Array(4*(2*N + 1) + 1).join(String.fromCharCode(0xFFF0));
gc();
str1 = str2 = null;
gc();
var firstCall = true;
a.sort(function (a, b) {
if (firstCall) {
firstCall = false;
gc();
}
return a - b;
});
reportCompare(expect, actual, summary);
exitFunc ('test');
}