gecko/js/tests/e4x/GC/regress-339785.js

93 lines
2.9 KiB
JavaScript

/* -*- Mode: java; tab-width:8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 ***** */
gTestfile = 'regress-339785.js';
var summary = "scanner: memory exposure to scripts";
var BUGNUMBER = 339785;
var actual = '';
var expect = '';
printBugNumber(BUGNUMBER);
START(summary);
function evalXML(N)
{
var str = Array(N + 1).join('a'); // str is string of N a
src = "var x = <xml>&"+str+";</xml>;";
try {
eval(src);
return "Should have thrown unknown entity error";
} catch (e) {
return e.message;
}
return "Unexpected";
}
var N1 = 1;
var must_be_good = evalXML(N1);
expect = 'unknown XML entity a';
actual = must_be_good;
TEST(1, expect, actual);
function testScanner()
{
for (var power = 2; power != 15; ++power) {
var N2 = (1 << power) - 2;
var can_be_bad = evalXML(N2);
var diff = can_be_bad.length - must_be_good.length;
if (diff != 0 && diff != N2 - N1) {
return "Detected memory exposure at entity length of "+(N2+2);
}
}
return "Ok";
}
expect = "Ok";
// repeat test since test does not always fail
for (var iTestScanner = 0; iTestScanner < 100; ++iTestScanner)
{
actual = testScanner();
TEST(iTestScanner+1, expect, actual);
}
END();