js/src/jit-test/tests/debug/Environment-getVariable-13.js@6474c204b198 (annotated)
js/src/jit-test/tests/debug/Environment-getVariable-13.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 | // Tests that we can use debug scopes with Ion frames. |
| michael@0 | 2 | // |
| michael@0 | 3 | // Unfortunately these tests are brittle. They depend on opaque JIT heuristics |
| michael@0 | 4 | // kicking in. |
| michael@0 | 5 | |
| michael@0 | 6 | load(libdir + "jitopts.js"); |
| michael@0 | 7 | |
| michael@0 | 8 | if (!jitTogglesMatch(Opts_Ion2NoParallelCompilation)) |
| michael@0 | 9 | quit(0); |
| michael@0 | 10 | |
| michael@0 | 11 | withJitOptions(Opts_Ion2NoParallelCompilation, function () { |
| michael@0 | 12 | var g = newGlobal(); |
| michael@0 | 13 | var dbg = new Debugger; |
| michael@0 | 14 | |
| michael@0 | 15 | // Note that this *depends* on CCW scripted functions being opaque to Ion |
| michael@0 | 16 | // optimization and not deoptimizing the frames below the call to toggle. |
| michael@0 | 17 | g.toggle = function toggle(d) { |
| michael@0 | 18 | if (d) { |
| michael@0 | 19 | dbg.addDebuggee(g); |
| michael@0 | 20 | var frame = dbg.getNewestFrame(); |
| michael@0 | 21 | assertEq(frame.implementation, "ion"); |
| michael@0 | 22 | // g is heavyweight but its call object is optimized out, because its |
| michael@0 | 23 | // arguments and locals are unaliased. |
| michael@0 | 24 | // |
| michael@0 | 25 | // Calling frame.environment here should make a fake debug scope that |
| michael@0 | 26 | // gets things directly from the frame. Calling frame.arguments doesn't |
| michael@0 | 27 | // go through the scope object and reads directly off the frame. Assert |
| michael@0 | 28 | // that the two are equal. |
| michael@0 | 29 | assertEq(frame.environment.getVariable("x"), frame.arguments[1]); |
| michael@0 | 30 | } |
| michael@0 | 31 | }; |
| michael@0 | 32 | |
| michael@0 | 33 | g.eval("" + function f(d, x) { g(d, x); }); |
| michael@0 | 34 | g.eval("" + function g(d, x) { |
| michael@0 | 35 | for (var i = 0; i < 200; i++); |
| michael@0 | 36 | function inner() { i = 42; }; |
| michael@0 | 37 | toggle(d); |
| michael@0 | 38 | // Use x so it doesn't get optimized out. |
| michael@0 | 39 | x++; |
| michael@0 | 40 | }); |
| michael@0 | 41 | |
| michael@0 | 42 | g.eval("(" + function test() { |
| michael@0 | 43 | for (i = 0; i < 5; i++) |
| michael@0 | 44 | f(false, 42); |
| michael@0 | 45 | f(true, 42); |
| michael@0 | 46 | } + ")();"); |
| michael@0 | 47 | }); |
