The Tor Browser / file revision

 // Debugger.Frames of all implementations.

 load(libdir + "jitopts.js");

 function testFrameImpl(jitopts, assertFrameImpl) {

   if (!jitTogglesMatch(jitopts))

     return;

   withJitOptions(jitopts, function () {

     var g = newGlobal();

     var dbg = new Debugger;

     g.toggle = function toggle(d) {

       if (d) {

         dbg.addDebuggee(g);

         var frame = dbg.getNewestFrame();

         // We only care about the f and g frames.

         for (var i = 0; i < 2; i++) {

           assertFrameImpl(frame);

           frame = frame.older;

         }

       }

     };

     g.eval("" + function f(d) { g(d); });

     g.eval("" + function g(d) { toggle(d); });

     g.eval("(" + function test() {

       for (var i = 0; i < 5; i++)

         f(false);

       f(true);

     } + ")();");

   });

 }

 [[Opts_BaselineEager,

   function (f) { assertEq(f.implementation, "baseline"); }],

  // Note that the Ion case *depends* on CCW scripted functions being opaque to

  // Ion optimization and not deoptimizing the frames below the call to toggle.

  [Opts_Ion2NoParallelCompilation,

   function (f) { assertEq(f.implementation, "ion"); }],

  [Opts_NoJits,

   function (f) { assertEq(f.implementation, "interpreter"); }]].forEach(function ([opts, fn]) {

     testFrameImpl(opts, fn);

   });