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// Check that the EnterJIT frame, added by the JIT trampoline and
// usable by a native unwinder to resume unwinding after encountering
// JIT code, is pushed as expected.
function run_test() {
let p = Cc["@mozilla.org/tools/profiler;1"];
// Just skip the test if the profiler component isn't present.
if (!p)
return;
p = p.getService(Ci.nsIProfiler);
if (!p)
return;
// This test assumes that it's starting on an empty SPS stack.
// (Note that the other profiler tests also assume the profiler
// isn't already started.)
do_check_true(!p.IsActive());
const ms = 5;
p.StartProfiler(100, ms, ["js"], 1);
function arbitrary_name(){
// A frame for |arbitrary_name| has been pushed. Do a sequence of
// increasingly long spins until we get a sample.
var delayMS = 5;
while (1) {
do_print("loop: ms = " + delayMS);
let then = Date.now();
do {
let n = 10000;
while (--n); // OSR happens here
// Spin in the hope of getting a sample.
} while (Date.now() - then < delayMS);
let pr = p.getProfileData().threads[0];
if (pr.samples.data.length > 0 || delayMS > 30000)
return pr;
delayMS *= 2;
}
};
var profile = arbitrary_name();
do_check_neq(profile.samples.data.length, 0);
var lastSample = profile.samples.data[profile.samples.data.length - 1];
var stack = getInflatedStackLocations(profile, lastSample);
do_print(stack);
// All we can really check here is ensure that there is exactly
// one arbitrary_name frame in the list.
var gotName = false;
for (var i = 0; i < stack.length; i++) {
if (stack[i].match(/arbitrary_name/)) {
do_check_eq(gotName, false);
gotName = true;
}
}
do_check_eq(gotName, true);
p.StopProfiler();
}
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