The Tor Browser / file comparison
comparison: js/src/tests/js1_8/extensions/regress-422269.js
js/src/tests/js1_8/extensions/regress-422269.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:0d08e969b7f5 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 //----------------------------------------------------------------------------- | |
| 7 var BUGNUMBER = 422269; | |
| 8 var summary = 'Compile-time let block should not capture runtime references'; | |
| 9 var actual = 'referenced only by stack and closure'; | |
| 10 var expect = 'referenced only by stack and closure'; | |
| 11 | |
| 12 | |
| 13 //----------------------------------------------------------------------------- | |
| 14 test(); | |
| 15 | |
| 16 //----------------------------------------------------------------------------- | |
| 17 | |
| 18 function test() | |
| 19 { | |
| 20 enterFunc ('test'); | |
| 21 printBugNumber(BUGNUMBER); | |
| 22 printStatus (summary); | |
| 23 | |
| 24 function f() | |
| 25 { | |
| 26 let m = {sin: Math.sin}; | |
| 27 (function holder() { m.sin(1); })(); | |
| 28 return m; | |
| 29 } | |
| 30 | |
| 31 if (typeof findReferences == 'undefined') | |
| 32 { | |
| 33 expect = actual = 'Test skipped'; | |
| 34 print('Test skipped. Requires findReferences function.'); | |
| 35 } | |
| 36 else | |
| 37 { | |
| 38 var x = f(); | |
| 39 var refs = findReferences(x); | |
| 40 | |
| 41 // At this point, x should only be referenced from the stack --- the | |
| 42 // variable 'x' itself, and any random things the conservative scanner | |
| 43 // finds --- and possibly from the 'holder' closure, which could itself | |
| 44 // be held alive for random reasons. Remove those from the refs list, and | |
| 45 // then complain if anything is left. | |
| 46 for (var edge in refs) { | |
| 47 // Remove references from roots, like the stack. | |
| 48 if (refs[edge].every(function (r) r === null)) | |
| 49 delete refs[edge]; | |
| 50 // Remove references from the closure, which could be held alive for | |
| 51 // random reasons. | |
| 52 else if (refs[edge].length === 1 && | |
| 53 typeof refs[edge][0] === "function" && | |
| 54 refs[edge][0].name === "holder") | |
| 55 delete refs[edge]; | |
| 56 } | |
| 57 | |
| 58 if (Object.keys(refs).length != 0) | |
| 59 actual = "unexpected references to the result of f: " + Object.keys(refs).join(", "); | |
| 60 } | |
| 61 reportCompare(expect, actual, summary); | |
| 62 | |
| 63 exitFunc ('test'); | |
| 64 } |
