The Tor Browser / file comparison
comparison: js/src/tests/js1_5/GC/regress-324278.js
js/src/tests/js1_5/GC/regress-324278.js
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:d5835f98c2e1 |
|---|---|
| 1 // |reftest| skip -- slow, obsoleted by 98409 fix | |
| 2 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 //----------------------------------------------------------------------------- | |
| 8 var BUGNUMBER = 324278; | |
| 9 var summary = 'GC without recursion'; | |
| 10 var actual = 'No Crash'; | |
| 11 var expect = 'No Crash'; | |
| 12 | |
| 13 printBugNumber(BUGNUMBER); | |
| 14 printStatus (summary); | |
| 15 | |
| 16 // Number to push native stack size beyond 10MB if GC recurses generating | |
| 17 // segfault on Fedora Core / Ubuntu Linuxes where the stack size by default | |
| 18 // is 10MB/8MB. | |
| 19 var N = 100*1000; | |
| 20 | |
| 21 function build(N) { | |
| 22 // Exploit the fact that (in ES3), regexp literals are shared between | |
| 23 // function invocations. Thus we build the following chain: | |
| 24 // chainTop: function->regexp->function->regexp....->null | |
| 25 // to check how GC would deal with this chain. | |
| 26 | |
| 27 var chainTop = null; | |
| 28 for (var i = 0; i != N; ++i) { | |
| 29 var f = Function('some_arg'+i, ' return /test/;'); | |
| 30 var re = f(); | |
| 31 re.previous = chainTop; | |
| 32 chainTop = f; | |
| 33 } | |
| 34 return chainTop; | |
| 35 } | |
| 36 | |
| 37 function check(chainTop, N) { | |
| 38 for (var i = 0; i != N; ++i) { | |
| 39 var re = chainTop(); | |
| 40 chainTop = re.previous; | |
| 41 } | |
| 42 if (chainTop !== null) | |
| 43 throw "Bad chainTop"; | |
| 44 | |
| 45 } | |
| 46 | |
| 47 if (typeof gc != "function") { | |
| 48 gc = function() { | |
| 49 for (var i = 0; i != 50*1000; ++i) { | |
| 50 var tmp = new Object(); | |
| 51 } | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 var chainTop = build(N); | |
| 56 printStatus("BUILT"); | |
| 57 gc(); | |
| 58 check(chainTop, N); | |
| 59 printStatus("CHECKED"); | |
| 60 chainTop = null; | |
| 61 gc(); | |
| 62 | |
| 63 reportCompare(expect, actual, summary); |
