js/src/jit-test/tests/debug/gc-05.js@6474c204b198 (annotated)
js/src/jit-test/tests/debug/gc-05.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 | // If a Debugger survives its debuggee, its object cache must still be swept. |
| michael@0 | 2 | |
| michael@0 | 3 | var g2arr = []; // non-debuggee globals |
| michael@0 | 4 | var xarr = []; // debuggee objects |
| michael@0 | 5 | |
| michael@0 | 6 | var N = 4, M = 4; |
| michael@0 | 7 | for (var i = 0; i < N; i++) { |
| michael@0 | 8 | var g1 = newGlobal(); |
| michael@0 | 9 | g1.M = M; |
| michael@0 | 10 | var dbg = new Debugger(g1); |
| michael@0 | 11 | var g2 = g1.eval("newGlobal('same-compartment')"); |
| michael@0 | 12 | g1.x = g2.eval("x = {};"); |
| michael@0 | 13 | |
| michael@0 | 14 | dbg.onDebuggerStatement = function (frame) { xarr.push(frame.eval("x").return); }; |
| michael@0 | 15 | g1.eval("debugger;"); |
| michael@0 | 16 | g2arr.push(g2); |
| michael@0 | 17 | |
| michael@0 | 18 | g1 = null; |
| michael@0 | 19 | gc(); |
| michael@0 | 20 | } |
| michael@0 | 21 | |
| michael@0 | 22 | // At least some of the debuggees have probably been collected at this |
| michael@0 | 23 | // point. It is nondeterministic, though. |
| michael@0 | 24 | assertEq(g2arr.length, N); |
| michael@0 | 25 | assertEq(xarr.length, N); |
| michael@0 | 26 | |
| michael@0 | 27 | // Try to make g2arr[i].eval eventually allocate a new object in the same |
| michael@0 | 28 | // location as a previously gc'd object. If the object caches are not being |
| michael@0 | 29 | // swept, the pointer coincidence will cause a Debugger.Object to be erroneously |
| michael@0 | 30 | // reused. |
| michael@0 | 31 | for (var i = 0; i < N; i++) { |
| michael@0 | 32 | var obj = xarr[i]; |
| michael@0 | 33 | for (j = 0; j < M; j++) { |
| michael@0 | 34 | assertEq(obj instanceof Debugger.Object, true); |
| michael@0 | 35 | g2arr[i].eval("x = x.prop = {};"); |
| michael@0 | 36 | obj = obj.getOwnPropertyDescriptor("prop").value;; |
| michael@0 | 37 | assertEq("seen" in obj, false); |
| michael@0 | 38 | obj.seen = true; |
| michael@0 | 39 | gc(); |
| michael@0 | 40 | } |
| michael@0 | 41 | } |
