michael@0: // Check that the EnterJIT frame, added by the JIT trampoline and
michael@0: // usable by a native unwinder to resume unwinding after encountering
michael@0: // JIT code, is pushed as expected.
michael@0: function run_test() {
michael@0:     let p = Cc["@mozilla.org/tools/profiler;1"];
michael@0:     // Just skip the test if the profiler component isn't present.
michael@0:     if (!p)
michael@0: 	return;
michael@0:     p = p.getService(Ci.nsIProfiler);
michael@0:     if (!p)
michael@0: 	return;
michael@0: 
michael@0:     // This test assumes that it's starting on an empty SPS stack.
michael@0:     // (Note that the other profiler tests also assume the profiler
michael@0:     // isn't already started.)
michael@0:     do_check_true(!p.IsActive());
michael@0: 
michael@0:     const ms = 5;
michael@0:     p.StartProfiler(100, ms, ["js"], 1);
michael@0:     let profile = (function arbitrary_name(){
michael@0: 	// A frame for |arbitrary_name| has been pushed.
michael@0: 	let then = Date.now();
michael@0: 	do {
michael@0: 	    let n = 10000;
michael@0: 	    while (--n); // OSR happens here
michael@0: 	    // Spin until we're sure we have a sample.
michael@0: 	} while (Date.now() - then < ms * 2.5);
michael@0: 	return p.getProfileData().threads[0].samples;
michael@0:     })();
michael@0:     do_check_neq(profile.length, 0);
michael@0:     let stack = profile[profile.length - 1].frames.map(f => f.location);
michael@0:     stack = stack.slice(stack.indexOf("js::RunScript") + 1);
michael@0: 
michael@0:     do_print(stack);
michael@0:     // This test needs to not break on platforms and configurations
michael@0:     // where IonMonkey isn't available / enabled.
michael@0:     if (stack.length < 2 || stack[1] != "EnterJIT") {
michael@0: 	do_print("No JIT?");
michael@0: 	// Try to check what we can....
michael@0: 	do_check_eq(Math.min(stack.length, 1), 1);
michael@0: 	let thisInterp = stack[0];
michael@0: 	do_check_eq(thisInterp.split(" ")[0], "arbitrary_name");
michael@0: 	if (stack.length >= 2) {
michael@0: 	    let nextFrame = stack[1];
michael@0: 	    do_check_neq(nextFrame.split(" ")[0], "arbitrary_name");
michael@0: 	}
michael@0:     } else {
michael@0: 	do_check_eq(Math.min(stack.length, 3), 3);
michael@0: 	let thisInterp = stack[0];
michael@0: 	let enterJit = stack[1];
michael@0: 	let thisBC = stack[2];
michael@0: 	do_check_eq(thisInterp.split(" ")[0], "arbitrary_name");
michael@0: 	do_check_eq(enterJit, "EnterJIT");
michael@0: 	do_check_eq(thisBC.split(" ")[0], "arbitrary_name");
michael@0:     }
michael@0: 
michael@0:     p.StopProfiler();
michael@0: }