The Tor Browser / file revision

 /* 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/. */

 this.EXPORTED_SYMBOLS = ["TelemetryLog"];

 const Cc = Components.classes;

 const Ci = Components.interfaces;

 const Telemetry = Cc["@mozilla.org/base/telemetry;1"].getService(Ci.nsITelemetry);

 var gLogEntries = [];

 this.TelemetryLog = Object.freeze({

   log: function(id, data) {

     id = String(id);

     var ts;

     try {

       ts = Math.floor(Telemetry.msSinceProcessStart());

     } catch(e) {

       // If timestamp is screwed up, we just give up instead of making up

       // data.

       return;

     }

     var entry = [id, ts];

     if (data !== undefined) {

       entry = entry.concat(Array.prototype.map.call(data, String));

     }

     gLogEntries.push(entry);

   },

   entries: function() {

     return gLogEntries;

   }

 });