111 lines
3.1 KiB
JavaScript
111 lines
3.1 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80 filetype=javascript: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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/**
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* Read the data saved by nsTerminator during shutdown and feed it to the
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* relevant telemetry histograms.
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*/
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const { ComponentUtils } = ChromeUtils.import(
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"resource://gre/modules/ComponentUtils.jsm"
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);
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const lazy = {};
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ChromeUtils.defineModuleGetter(
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lazy,
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"setTimeout",
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"resource://gre/modules/Timer.jsm"
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);
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const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
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function nsTerminatorTelemetry() {}
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var HISTOGRAMS = {
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"quit-application": "SHUTDOWN_PHASE_DURATION_TICKS_QUIT_APPLICATION",
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"profile-change-net-teardown":
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"SHUTDOWN_PHASE_DURATION_TICKS_PROFILE_CHANGE_NET_TEARDOWN",
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"profile-change-teardown":
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"SHUTDOWN_PHASE_DURATION_TICKS_PROFILE_CHANGE_TEARDOWN",
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"profile-before-change":
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"SHUTDOWN_PHASE_DURATION_TICKS_PROFILE_BEFORE_CHANGE",
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"profile-before-change-qm":
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"SHUTDOWN_PHASE_DURATION_TICKS_PROFILE_BEFORE_CHANGE_QM",
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"xpcom-will-shutdown": "SHUTDOWN_PHASE_DURATION_TICKS_XPCOM_WILL_SHUTDOWN",
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"xpcom-shutdown": "SHUTDOWN_PHASE_DURATION_TICKS_XPCOM_SHUTDOWN",
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};
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nsTerminatorTelemetry.prototype = {
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classID: Components.ID("{3f78ada1-cba2-442a-82dd-d5fb300ddea7}"),
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_xpcom_factory: ComponentUtils.generateSingletonFactory(
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nsTerminatorTelemetry
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),
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// nsISupports
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QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
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// nsIObserver
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observe: function DS_observe(aSubject, aTopic, aData) {
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(async function() {
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//
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// This data is hardly critical, reading it can wait for a few seconds.
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//
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await new Promise(resolve => lazy.setTimeout(resolve, 3000));
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let PATH = PathUtils.join(
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Services.dirsvc.get("ProfLD", Ci.nsIFile).path,
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"ShutdownDuration.json"
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);
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let data;
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try {
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data = await IOUtils.readJSON(PATH);
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} catch (ex) {
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if (DOMException.isInstance(ex) && ex.name == "NotFoundError") {
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return;
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}
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// Let other errors be reported by Promise's error-reporting.
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throw ex;
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}
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// Clean up
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await IOUtils.remove(PATH);
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await IOUtils.remove(PATH + ".tmp");
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for (let k of Object.keys(data)) {
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let id = HISTOGRAMS[k];
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try {
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let histogram = Services.telemetry.getHistogramById(id);
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if (!histogram) {
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throw new Error("Unknown histogram " + id);
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}
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histogram.add(Number.parseInt(data[k]));
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} catch (ex) {
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// Make sure that the error is reported and causes test failures,
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// but otherwise, ignore it.
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Promise.reject(ex);
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continue;
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}
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}
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// Inform observers that we are done.
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Services.obs.notifyObservers(
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null,
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"shutdown-terminator-telemetry-updated"
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);
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})();
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},
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};
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// Module
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var EXPORTED_SYMBOLS = ["nsTerminatorTelemetry"];
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