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comparison: js/src/jit-test/tests/debug/Environment-getVariable-13.js
js/src/jit-test/tests/debug/Environment-getVariable-13.js
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:8615cec53e91 |
|---|---|
| 1 // Tests that we can use debug scopes with Ion frames. | |
| 2 // | |
| 3 // Unfortunately these tests are brittle. They depend on opaque JIT heuristics | |
| 4 // kicking in. | |
| 5 | |
| 6 load(libdir + "jitopts.js"); | |
| 7 | |
| 8 if (!jitTogglesMatch(Opts_Ion2NoParallelCompilation)) | |
| 9 quit(0); | |
| 10 | |
| 11 withJitOptions(Opts_Ion2NoParallelCompilation, function () { | |
| 12 var g = newGlobal(); | |
| 13 var dbg = new Debugger; | |
| 14 | |
| 15 // Note that this *depends* on CCW scripted functions being opaque to Ion | |
| 16 // optimization and not deoptimizing the frames below the call to toggle. | |
| 17 g.toggle = function toggle(d) { | |
| 18 if (d) { | |
| 19 dbg.addDebuggee(g); | |
| 20 var frame = dbg.getNewestFrame(); | |
| 21 assertEq(frame.implementation, "ion"); | |
| 22 // g is heavyweight but its call object is optimized out, because its | |
| 23 // arguments and locals are unaliased. | |
| 24 // | |
| 25 // Calling frame.environment here should make a fake debug scope that | |
| 26 // gets things directly from the frame. Calling frame.arguments doesn't | |
| 27 // go through the scope object and reads directly off the frame. Assert | |
| 28 // that the two are equal. | |
| 29 assertEq(frame.environment.getVariable("x"), frame.arguments[1]); | |
| 30 } | |
| 31 }; | |
| 32 | |
| 33 g.eval("" + function f(d, x) { g(d, x); }); | |
| 34 g.eval("" + function g(d, x) { | |
| 35 for (var i = 0; i < 200; i++); | |
| 36 function inner() { i = 42; }; | |
| 37 toggle(d); | |
| 38 // Use x so it doesn't get optimized out. | |
| 39 x++; | |
| 40 }); | |
| 41 | |
| 42 g.eval("(" + function test() { | |
| 43 for (i = 0; i < 5; i++) | |
| 44 f(false, 42); | |
| 45 f(true, 42); | |
| 46 } + ")();"); | |
| 47 }); |
