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/* import-globals-from ../shared-head.js */
Services.scriptloader.loadSubScript(
"chrome://mochitests/content/browser/tools/profiler/tests/browser/shared-head.js",
this
);
const BASE_URL = "http://example.com/browser/tools/profiler/tests/browser/";
const BASE_URL_HTTPS =
"https://example.com/browser/tools/profiler/tests/browser/";
registerCleanupFunction(async () => {
if (Services.profiler.IsActive()) {
info(
"The profiler was found to still be running at the end of the test, which means that some error likely occured. Let's stop it to prevent issues with following tests!"
);
await Services.profiler.StopProfiler();
}
});
/**
* This is a helper function that will stop the profiler and returns the main
* threads for the parent process and the content process with PID contentPid.
* This happens immediately, without waiting for any sampling to happen or
* finish. Use waitSamplingAndStopProfilerAndGetThreads below instead to wait
* for samples before stopping.
* This returns also the full profile in case the caller wants more information.
*
* @param {number} contentPid
* @returns {Promise<{profile, parentThread, contentProcess, contentThread}>}
*/
async function stopProfilerNowAndGetThreads(contentPid) {
const profile = await stopNowAndGetProfile();
const parentThread = profile.threads[0];
const contentProcess = profile.processes.find(
p => p.threads[0].pid == contentPid
);
if (!contentProcess) {
throw new Error(
`Could not find the content process with given pid: ${contentPid}`
);
}
if (!parentThread) {
throw new Error("The parent thread was not found in the profile.");
}
const contentThread = contentProcess.threads[0];
if (!contentThread) {
throw new Error("The content thread was not found in the profile.");
}
return { profile, parentThread, contentProcess, contentThread };
}
/**
* This is a helper function that will stop the profiler and returns the main
* threads for the parent process and the content process with PID contentPid.
* As opposed to stopProfilerNowAndGetThreads (with "Now") above, the profiler
* in that PID will not stop until there is at least one periodic sample taken.
*
* @param {number} contentPid
* @returns {Promise<{profile, parentThread, contentProcess, contentThread}>}
*/
async function waitSamplingAndStopProfilerAndGetThreads(contentPid) {
await Services.profiler.waitOnePeriodicSampling();
return stopProfilerNowAndGetThreads(contentPid);
}
/** This tries to find the service worker thread by targeting a very specific
* UserTiming marker. Indeed we use performance.mark to add this marker from the
* service worker's events.
* Then from this thread we get its parent thread. Indeed the parent thread is
* where all network stuff happens, so this is useful for network marker tests.
*
* @param {Object} profile
* @returns {{ serviceWorkerThread: Object, serviceWorkerParentThread: Object }} the found threads
*/
function findServiceWorkerThreads(profile) {
const allThreads = [
profile.threads,
...profile.processes.map(process => process.threads),
].flat();
const serviceWorkerThread = allThreads.find(
({ processType, markers }) =>
processType === "tab" &&
markers.data.some(markerTuple => {
const data = markerTuple[markers.schema.data];
return (
data &&
data.type === "UserTiming" &&
data.name === "__serviceworker_event"
);
})
);
if (!serviceWorkerThread) {
info(
"We couldn't find a service worker thread. Here are all the threads in this profile:"
);
allThreads.forEach(logInformationForThread.bind(null, ""));
return null;
}
const serviceWorkerParentThread = allThreads.find(
({ name, pid }) => pid === serviceWorkerThread.pid && name === "GeckoMain"
);
if (!serviceWorkerParentThread) {
info(
`We couldn't find a parent thread for the service worker thread (pid: ${serviceWorkerThread.pid}, tid: ${serviceWorkerThread.tid}).`
);
info("Here are all the threads in this profile:");
allThreads.forEach(logInformationForThread.bind(null, ""));
// Let's write the profile on disk if MOZ_UPLOAD_DIR is present
const path = Services.env.get("MOZ_UPLOAD_DIR");
if (path) {
const profileName = `profile_${Date.now()}.json`;
const profilePath = PathUtils.join(path, profileName);
info(
`We wrote down the profile on disk as an artifact, with name ${profileName}.`
);
// This function returns a Promise, but we're not waiting on it because
// we're in a synchronous function. Hopefully writing will be finished
// when the process ends.
IOUtils.writeJSON(profilePath, profile).catch(err =>
console.error("An error happened when writing the profile on disk", err)
);
}
throw new Error(
"We couldn't find a parent thread for the service worker thread. Please read logs to find more information."
);
}
return { serviceWorkerThread, serviceWorkerParentThread };
}
/**
* This logs some basic information about the passed thread.
*
* @param {string} prefix
* @param {Object} thread
*/
function logInformationForThread(prefix, thread) {
if (!thread) {
info(prefix + ": thread is null or undefined.");
return;
}
const { name, pid, tid, processName, processType } = thread;
info(
`${prefix}: ` +
`name(${name}) pid(${pid}) tid(${tid}) processName(${processName}) processType(${processType})`
);
}
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