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The events in question do not have associated histograms, but are included in the JSON payload that nsTerminator writes. The test for this functionality has been updated to reflect real conditions and correctly fails without the fix in this patch. Differential Revision: https://phabricator.services.mozilla.com/D168706
124 lines
3.5 KiB
JavaScript
124 lines
3.5 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 lazy = {};
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ChromeUtils.defineESModuleGetters(lazy, {
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PromiseUtils: "resource://gre/modules/PromiseUtils.sys.mjs",
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setTimeout: "resource://gre/modules/Timer.sys.mjs",
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});
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function nsTerminatorTelemetry() {
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this._wasNotified = false;
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this._deferred = lazy.PromiseUtils.defer();
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IOUtils.sendTelemetry.addBlocker(
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"TerminatoryTelemetry: Waiting to submit telemetry",
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this._deferred.promise,
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() => ({
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wasNotified: this._wasNotified,
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})
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);
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}
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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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// The following keys appear in the JSON, but do not have associated
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// histograms.
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"xpcom-shutdown-threads": null,
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XPCOMShutdownFinal: null,
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CCPostLastCycleCollection: null,
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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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// 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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this._wasNotified = true;
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(async () => {
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try {
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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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if (id === null) {
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// No histogram associated with this entry.
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continue;
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}
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try {
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let histogram = Services.telemetry.getHistogramById(id);
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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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} finally {
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this._deferred.resolve();
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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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