tests/stress/sparse-array-entry-update-144067.js

   1 /*
   2  * Copyright (C) 2015 Apple Inc. All rights reserved.
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   4  * Redistribution and use in source and binary forms, with or without
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   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
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  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 // Regression test for https://bugs.webkit.org/show_bug.cgi?id=144067.
  27 // This test aims to continually override the setter in a sparse array object, and
  28 // trigger GCs to give it a chance to collect the newly set entry value if the bug exists.
  29 // With the bug fixed, this test should not crash.
  30
  31 var data = {};
  32 var sparseObj = {};
  33
  34 for (var i = 0; i < 5; i++)
  35     sparseObj[i] = i;
  36
  37 function useMemoryToTriggerGCs() {
  38     var arr = [];
  39     var limit = DFGTrue() ? 10000 : 100;
  40     for (var i = 0; i < limit; i++)
  41         arr[i] = { a: "using" + i, b: "up" + i, c: "memory" + i };
  42     return arr;
  43 }
  44
  45 function foo(x) {
  46     if (!x)
  47         return;
  48     data.textContent = sparseObj.__defineSetter__("16384", foo);
  49     for (var i = 0; i < 10; i++)
  50         sparseObj.__defineSetter__("" + (16384 + i), foo);
  51     useMemoryToTriggerGCs();
  52     sparseObj[16384] = x - 1;
  53 }
  54
  55 var recursionDepthNeededToTriggerTheFailure = 100;
  56 foo(recursionDepthNeededToTriggerTheFailure);