The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/tests/js1_5/extensions/regress-341956-01.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,68 @@
     1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +//-----------------------------------------------------------------------------
    1.10 +var BUGNUMBER = 341956;
    1.11 +var summary = 'GC Hazards in jsarray.c - unshift';
    1.12 +var actual = 'No Crash';
    1.13 +var expect = 'No Crash';
    1.14 +
    1.15 +//-----------------------------------------------------------------------------
    1.16 +test();
    1.17 +//-----------------------------------------------------------------------------
    1.18 +
    1.19 +function test()
    1.20 +{
    1.21 +  enterFunc ('test');
    1.22 +  printBugNumber(BUGNUMBER);
    1.23 +  printStatus (summary);
    1.24 + 
    1.25 +  var N = 0xFFFFFFFF;
    1.26 +
    1.27 +  var a = [];
    1.28 +  a[N - 1] = 1;
    1.29 +  a.__defineGetter__(N - 1, function() {
    1.30 +		       var tmp = [];
    1.31 +		       tmp[N - 2] = 0;
    1.32 +		       if (typeof gc == 'function')
    1.33 +			 gc();
    1.34 +		       for (var i = 0; i != 50000; ++i) {
    1.35 +			 var tmp = 1 / 3;
    1.36 +			 tmp /= 10;
    1.37 +		       }
    1.38 +		       for (var i = 0; i != 1000; ++i) {
    1.39 +			 // Make string with 11 characters that would take
    1.40 +			 // (11 + 1) * 2 bytes or sizeof(JSAtom) so eventually
    1.41 +			 // malloc will ovewrite just freed atoms.
    1.42 +			 var tmp2 = Array(12).join(' ');
    1.43 +		       }
    1.44 +		       return 10;
    1.45 +		     });
    1.46 +
    1.47 +
    1.48 +// The following always-throw getter is to stop unshift from doing
    1.49 +// 2^32 iterations.
    1.50 +  var toStop = "stringToStop";
    1.51 +  a[N - 3] = 0;
    1.52 +  a.__defineGetter__(N - 3, function() { throw toStop; });
    1.53 +
    1.54 +  var good = false;
    1.55 +
    1.56 +  try {
    1.57 +    a.unshift(1);
    1.58 +  } catch (e) {
    1.59 +    if (e === toStop)
    1.60 +      good = true;
    1.61 +  }
    1.62 +
    1.63 +  expect = true;
    1.64 +  actual = good;
    1.65 +
    1.66 +  reportCompare(expect, actual, summary);
    1.67 +
    1.68 +  print('Done');
    1.69 +
    1.70 +  exitFunc ('test');
    1.71 +}