e4x/extensions/regress-352846-03.js

/* -*- Mode: java; tab-width:8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 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
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 * Software distributed under the License is distributed on an "AS IS" basis,
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 *
 * The Original Code is JavaScript Engine testing utilities.
 *
 * The Initial Developer of the Original Code is
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 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): Igor Bukanov
 *
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 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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gTestfile = 'regress-352846-03.js';

var BUGNUMBER = 352846;
var summary = 'Passing unrooted value to OBJ_DEFAULT_VALUE is GC hazard';
var actual = 'No Crash';
var expect = 'No Crash';

printBugNumber(BUGNUMBER);
START(summary);

var counter = 0;

function prepare_xml()
{
  delete XML.prototype.function::toString;
  Object.prototype.toString getter = toSource_getter;
  return new XML("<a>xml_text</a>");
}

function toSource_getter()
{
  // Make sure that lastInternalResult does not contain prepare_xml
  var tmp = { toSource: function() { return [1,2,3]; } };
  uneval(tmp);

  if (counter++ < 2) return undefined;

  // run GC onr overwrite the heap
  if (typeof gc == "function") gc();
  var x = 1e-100;
  for (var i = 0; i != 50000; ++i)
    var x2 = x / 4;

  // Return a function that would access this in non-trivial way to
  // check if prepare_xml() was rooted.
  return function() {
    print("xxx");
    return this.toXMLString();
  };
}

var obj = { };
obj.length getter = prepare_xml;
Array.reverse(obj);

TEST(1, expect, actual);

END();