// 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() { // This test assumes that it's starting on an empty profiler stack. // (Note that the other profiler tests also assume the profiler // isn't already started.) Assert.ok(!Services.profiler.IsActive());
const ms = 5;
Services.profiler.StartProfiler(10000, ms, ["js"]);
function has_arbitrary_name_in_stack() { // 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) {
info("loop: ms = " + delayMS); const then = Date.now(); do {
let n = 10000; // eslint-disable-next-line no-empty while (--n) {} // OSR happens here // Spin in the hope of getting a sample.
} while (Date.now() - then < delayMS);
let profile = Services.profiler.getProfileData().threads[0];
// Go through all of the stacks, and search for this function name. for (const sample of profile.samples.data) { const stack = getInflatedStackLocations(profile, sample);
info(`The following stack was found: ${stack}`); for (var i = 0; i < stack.length; i++) { if (stack[i].match(/arbitrary_name/)) { // This JS sample was correctly found. returntrue;
}
}
}
// Continue running this function with an increasingly long delay.
delayMS *= 2; if (delayMS > 30000) { returnfalse;
}
}
} Assert.ok(
has_arbitrary_name_in_stack(), "A JS frame was found before the test timeout."
);
Services.profiler.StopProfiler();
}
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