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// 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);
} + ")();");
});
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