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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* Test that JS capturing works as expected.
*/
add_task(async () => {
const entries = 10000;
const interval = 1;
const threads = [];
const features = ["js"];
await Services.profiler.StartProfiler(entries, interval, features, threads);
// Call the following to get a nice stack in the profiler:
// functionA -> functionB -> functionC -> captureAtLeastOneJsSample
const sampleIndex = await functionA();
const profile = await stopNowAndGetProfile();
const [thread] = profile.threads;
const { samples } = thread;
const inflatedStackFrames = getInflatedStackLocations(
thread,
samples.data[sampleIndex]
);
expectStackToContain(
inflatedStackFrames,
[
"(root)",
"js::RunScript",
// The following regexes match a string similar to:
//
// "functionA (/gecko/obj/_tests/xpcshell/tools/profiler/tests/xpcshell/test_feature_js.js:47:0)"
// or
// "functionA (test_feature_js.js:47:0)"
//
// this matches the script location
// | match the line number
// | | match the column number
// v v v
/^functionA \(.*test_feature_js\.js:\d+:\d+\)$/,
/^functionB \(.*test_feature_js\.js:\d+:\d+\)$/,
/^functionC \(.*test_feature_js\.js:\d+:\d+\)$/,
],
"The stack contains a few frame labels, as well as the JS functions that we called."
);
});
function functionA() {
return functionB();
}
function functionB() {
return functionC();
}
async function functionC() {
return captureAtLeastOneJsSample();
}
|
