js/src/jit-test/tests/basic/testMethodWriteBarrier3.js@ac0c01689b40
js/src/jit-test/tests/basic/testMethodWriteBarrier3.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.
1 function g() {}
3 function h() {
4 for (var i = 0; i < 9; i++)
5 x.f = i;
6 }
8 function j() {
9 x.f();
10 }
12 var x = {f: 0.7, g: g};
13 x.g(); // interpreter brands x
14 h();
15 print(shapeOf(x));
16 x.f = function (){}; // does not change x's shape
17 j();
18 print(shapeOf(x));
19 h(); // should change x's shape
21 var thrown = 'none';
22 try {
23 j(); // should throw since x.f === 8
24 } catch (exc) {
25 thrown = exc.name;
26 }
27 assertEq(thrown, 'TypeError');
