michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 341956;
michael@0: var summary = 'GC Hazards in jsarray.c - unshift';
michael@0: var actual = 'No Crash';
michael@0: var expect = 'No Crash';
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: test();
michael@0: //-----------------------------------------------------------------------------
michael@0: 
michael@0: function test()
michael@0: {
michael@0:   enterFunc ('test');
michael@0:   printBugNumber(BUGNUMBER);
michael@0:   printStatus (summary);
michael@0:  
michael@0:   var N = 0xFFFFFFFF;
michael@0: 
michael@0:   var a = [];
michael@0:   a[N - 1] = 1;
michael@0:   a.__defineGetter__(N - 1, function() {
michael@0: 		       var tmp = [];
michael@0: 		       tmp[N - 2] = 0;
michael@0: 		       if (typeof gc == 'function')
michael@0: 			 gc();
michael@0: 		       for (var i = 0; i != 50000; ++i) {
michael@0: 			 var tmp = 1 / 3;
michael@0: 			 tmp /= 10;
michael@0: 		       }
michael@0: 		       for (var i = 0; i != 1000; ++i) {
michael@0: 			 // Make string with 11 characters that would take
michael@0: 			 // (11 + 1) * 2 bytes or sizeof(JSAtom) so eventually
michael@0: 			 // malloc will ovewrite just freed atoms.
michael@0: 			 var tmp2 = Array(12).join(' ');
michael@0: 		       }
michael@0: 		       return 10;
michael@0: 		     });
michael@0: 
michael@0: 
michael@0: // The following always-throw getter is to stop unshift from doing
michael@0: // 2^32 iterations.
michael@0:   var toStop = "stringToStop";
michael@0:   a[N - 3] = 0;
michael@0:   a.__defineGetter__(N - 3, function() { throw toStop; });
michael@0: 
michael@0:   var good = false;
michael@0: 
michael@0:   try {
michael@0:     a.unshift(1);
michael@0:   } catch (e) {
michael@0:     if (e === toStop)
michael@0:       good = true;
michael@0:   }
michael@0: 
michael@0:   expect = true;
michael@0:   actual = good;
michael@0: 
michael@0:   reportCompare(expect, actual, summary);
michael@0: 
michael@0:   print('Done');
michael@0: 
michael@0:   exitFunc ('test');
michael@0: }