tests/mozilla/js1_5/Regress/regress-192414.js

   1 /* ***** BEGIN LICENSE BLOCK *****
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   4 * The contents of this file are subject to the Netscape Public License
   5 * Version 1.1 (the "License"); you may not use this file except in
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  12 * License.
  13 *
  14 * The Original Code is JavaScript Engine testing utilities.
  15 *
  16 * The Initial Developer of the Original Code is Netscape Communications Corp.
  17 * Portions created by the Initial Developer are Copyright (C) 2003
  18 * the Initial Developer. All Rights Reserved.
  19 *
  20 * Contributor(s): igor@icesoft.com, pschwartau@netscape.com
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  22 * Alternatively, the contents of this file may be used under the terms of
  23 * either the GNU General Public License Version 2 or later (the "GPL"), or
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  35 *
  36 *
  37 * Date:    08 February 2003
  38 * SUMMARY: Parser recursion should check stack overflow
  39 *
  40 * See http://bugzilla.mozilla.org/show_bug.cgi?id=192414
  41 *
  42 */
  43 //-----------------------------------------------------------------------------
  44 var UBound = 0;
  45 var bug = 192414;
  46 var summary = 'Parser recursion should check stack overflow';
  47 var status = '';
  48 var statusitems = [];
  49 var actual = '';
  50 var actualvalues = [];
  51 var expect= '';
  52 var expectedvalues = [];
  53
  54 /*
  55  * We will form an eval string to set the result-variable |actual|.
  56  * To get a feel for this, suppose N were 3. Then the eval string is
  57  * 'actual = (1&(1&(1&1)));' The expected value after eval() is 1.
  58  */
  59 status = inSection(1);
  60 var N = 10000;
  61 var left = repeat_str('(1&', N);
  62 var right = repeat_str(')', N);
  63 var str = 'actual = '.concat(left, '1', right, ';');
  64 try
  65 {
  66   eval(str);
  67 }
  68 catch (e)
  69 {
  70   /*
  71    * An exception during this eval is OK, as the runtime can throw one
  72    * in response to too deep recursion. We haven't crashed; good!
  73    */
  74   actual = 1;
  75 }
  76 expect = 1;
  77 addThis();
  78
  79
  80
  81 //-----------------------------------------------------------------------------
  82 test();
  83 //-----------------------------------------------------------------------------
  84
  85
  86
  87 function repeat_str(str, repeat_count)
  88 {
  89   var arr = new Array(--repeat_count);
  90   while (repeat_count != 0)
  91     arr[--repeat_count] = str;
  92   return str.concat.apply(str, arr);
  93 }
  94
  95
  96 function addThis()
  97 {
  98   statusitems[UBound] = status;
  99   actualvalues[UBound] = actual;
 100   expectedvalues[UBound] = expect;
 101   UBound++;
 102 }
 103
 104
 105 function test()
 106 {
 107   enterFunc('test');
 108   printBugNumber(bug);
 109   printStatus(summary);
 110
 111   for (var i=0; i<UBound; i++)
 112   {
 113     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
 114   }
 115
 116   exitFunc ('test');
 117 }