regress-341956-01.js

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/* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

//-----------------------------------------------------------------------------

var BUGNUMBER = 341956;

var summary = 'GC Hazards in jsarray.c - unshift';

var actual = 'No Crash';

var expect = 'No Crash';

//-----------------------------------------------------------------------------

test();

//-----------------------------------------------------------------------------

function test()

  printBugNumber(BUGNUMBER);

  printStatus (summary);

  var N = 0xFFFFFFFF;

  var a = [];

  a[N - 1] = 1;

  a.__defineGetter__(N - 1, function() {

		       var tmp = [];

		       tmp[N - 2] = 0;

		       if (typeof gc == 'function')

			 gc();

		       for (var i = 0; i != 50000; ++i) {

			 var tmp = 1 / 3;

			 tmp /= 10;

		       for (var i = 0; i != 1000; ++i) {

			 // Make string with 11 characters that would take

			 // (11 + 1) * 2 bytes or sizeof(JSAtom) so eventually

			 // malloc will ovewrite just freed atoms.

			 var tmp2 = Array(12).join(' ');

		       return 10;

});

// The following always-throw getter is to stop unshift from doing

// 2^32 iterations.

  var toStop = "stringToStop";

  a[N - 3] = 0;

  a.__defineGetter__(N - 3, function() { throw toStop; });

  var good = false;

  try {

    a.unshift(1);

  } catch (e) {

    if (e === toStop)

      good = true;

  expect = true;

  actual = good;

  reportCompare(expect, actual, summary);

  print('Done');