js/src/jit-test/tests/arrays/pop-nonarray-nonwritable-length.js@ac0c01689b40 (annotated)
js/src/jit-test/tests/arrays/pop-nonarray-nonwritable-length.js
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | // Array.prototype.pop does a strict assignment to this.length even if the |
| michael@0 | 2 | // caller is nonstrict. Bug 886087. |
| michael@0 | 3 | |
| michael@0 | 4 | load(libdir + "asserts.js"); |
| michael@0 | 5 | |
| michael@0 | 6 | // obj.length is read-only |
| michael@0 | 7 | var obj = {pop: [].pop, 0: "zero"}; |
| michael@0 | 8 | Object.defineProperty(obj, "length", {configurable: true, value: 1, writable: false}); |
| michael@0 | 9 | assertThrowsInstanceOf(() => obj.pop(), TypeError); |
| michael@0 | 10 | |
| michael@0 | 11 | // obj.length has only a getter |
| michael@0 | 12 | obj = {pop: [].pop, 0: "zero", get length() { return 1; }}; |
| michael@0 | 13 | assertThrowsInstanceOf(() => obj.pop(), TypeError); |
