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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80 filetype=javascript: */
/* 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/. */
"use strict";
/**
* Read the data saved by nsTerminator during shutdown and feed it to the
* relevant telemetry histograms.
*/
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
PromiseUtils: "resource://gre/modules/PromiseUtils.sys.mjs",
setTimeout: "resource://gre/modules/Timer.sys.mjs",
});
function nsTerminatorTelemetry() {
this._wasNotified = false;
this._deferred = lazy.PromiseUtils.defer();
IOUtils.sendTelemetry.addBlocker(
"TerminatoryTelemetry: Waiting to submit telemetry",
this._deferred.promise,
() => ({
wasNotified: this._wasNotified,
})
);
}
var HISTOGRAMS = {
"quit-application": "SHUTDOWN_PHASE_DURATION_TICKS_QUIT_APPLICATION",
"profile-change-net-teardown":
"SHUTDOWN_PHASE_DURATION_TICKS_PROFILE_CHANGE_NET_TEARDOWN",
"profile-change-teardown":
"SHUTDOWN_PHASE_DURATION_TICKS_PROFILE_CHANGE_TEARDOWN",
"profile-before-change":
"SHUTDOWN_PHASE_DURATION_TICKS_PROFILE_BEFORE_CHANGE",
"profile-before-change-qm":
"SHUTDOWN_PHASE_DURATION_TICKS_PROFILE_BEFORE_CHANGE_QM",
"xpcom-will-shutdown": "SHUTDOWN_PHASE_DURATION_TICKS_XPCOM_WILL_SHUTDOWN",
"xpcom-shutdown": "SHUTDOWN_PHASE_DURATION_TICKS_XPCOM_SHUTDOWN",
};
nsTerminatorTelemetry.prototype = {
classID: Components.ID("{3f78ada1-cba2-442a-82dd-d5fb300ddea7}"),
// nsISupports
QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
// nsIObserver
observe: function DS_observe(aSubject, aTopic, aData) {
this._wasNotified = true;
(async () => {
try {
//
// This data is hardly critical, reading it can wait for a few seconds.
//
await new Promise(resolve => lazy.setTimeout(resolve, 3000));
let PATH = PathUtils.join(
Services.dirsvc.get("ProfLD", Ci.nsIFile).path,
"ShutdownDuration.json"
);
let data;
try {
data = await IOUtils.readJSON(PATH);
} catch (ex) {
if (DOMException.isInstance(ex) && ex.name == "NotFoundError") {
return;
}
// Let other errors be reported by Promise's error-reporting.
throw ex;
}
// Clean up
await IOUtils.remove(PATH);
await IOUtils.remove(PATH + ".tmp");
for (let k of Object.keys(data)) {
let id = HISTOGRAMS[k];
try {
let histogram = Services.telemetry.getHistogramById(id);
if (!histogram) {
throw new Error("Unknown histogram " + id);
}
histogram.add(Number.parseInt(data[k]));
} catch (ex) {
// Make sure that the error is reported and causes test failures,
// but otherwise, ignore it.
Promise.reject(ex);
continue;
}
}
// Inform observers that we are done.
Services.obs.notifyObservers(
null,
"shutdown-terminator-telemetry-updated"
);
} finally {
this._deferred.resolve();
}
})();
},
};
// Module
var EXPORTED_SYMBOLS = ["nsTerminatorTelemetry"];
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