| // Tests that we can use debug scopes with Ion frames. |
| // |
| // Unfortunately these tests are brittle. They depend on opaque JIT heuristics |
| // kicking in. |
| |
| load(libdir + "jitopts.js"); |
| |
| if (!jitTogglesMatch(Opts_Ion2NoOffthreadCompilation)) |
| quit(0); |
| |
| withJitOptions(Opts_Ion2NoOffthreadCompilation, function () { |
| var g = newGlobal(); |
| var dbg = new Debugger; |
| |
| // Note that this *depends* on CCW scripted functions being opaque to Ion |
| // optimization and not deoptimizing the frames below the call to toggle. |
| g.toggle = function toggle(d) { |
| if (d) { |
| dbg.addDebuggee(g); |
| var frame = dbg.getNewestFrame(); |
| assertEq(frame.implementation, "ion"); |
| // g is heavyweight but its call object is optimized out, because its |
| // arguments and locals are unaliased. |
| // |
| // Calling frame.environment here should make a fake debug scope that |
| // gets things directly from the frame. Calling frame.arguments doesn't |
| // go through the scope object and reads directly off the frame. Assert |
| // that the two are equal. |
| assertEq(frame.environment.getVariable("x"), frame.arguments[1]); |
| } |
| }; |
| |
| g.eval("" + function f(d, x) { g(d, x); }); |
| g.eval("" + function g(d, x) { |
| for (var i = 0; i < 200; i++); |
| function inner() { i = 42; }; |
| toggle(d); |
| // Use x so it doesn't get optimized out. |
| x++; |
| }); |
| |
| g.eval("(" + function test() { |
| for (i = 0; i < 5; i++) |
| f(false, 42); |
| f(true, 42); |
| } + ")();"); |
| }); |