js/src/jit-test/tests/debug/gc-04.js@6474c204b198 (annotated)
js/src/jit-test/tests/debug/gc-04.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Storing a Debugger.Object as a key in a WeakMap protects it from GC as long as |
| michael@0 | 2 | // the referent is alive. |
| michael@0 | 3 | |
| michael@0 | 4 | var g = newGlobal(); |
| michael@0 | 5 | var N = g.N = 10; |
| michael@0 | 6 | var dbg = Debugger(g); |
| michael@0 | 7 | var cache = new WeakMap; |
| michael@0 | 8 | |
| michael@0 | 9 | var i = 0; |
| michael@0 | 10 | dbg.onDebuggerStatement = function (frame) { |
| michael@0 | 11 | cache.set(frame.arguments[0], i++); |
| michael@0 | 12 | }; |
| michael@0 | 13 | g.eval("function f(x) { debugger; }"); |
| michael@0 | 14 | g.eval("var arr = [], j; for (j = 0; j < N; j++) arr[j] = {};"); |
| michael@0 | 15 | g.eval("for (j = 0; j < N; j++) f(arr[j]);"); |
| michael@0 | 16 | assertEq(i, N); |
| michael@0 | 17 | |
| michael@0 | 18 | gc(); gc(); |
| michael@0 | 19 | |
| michael@0 | 20 | i = 0; |
| michael@0 | 21 | dbg.onDebuggerStatement = function (frame) { |
| michael@0 | 22 | assertEq(cache.get(frame.arguments[0]), i++) |
| michael@0 | 23 | }; |
| michael@0 | 24 | g.eval("for (j = 0; j < N; j++) f(arr[j]);"); |
| michael@0 | 25 | assertEq(i, N); |
