Assign each object an id and log emitted events with the id.

trace-all-events.js

(function() {
  var id = 0;

  function generateId() { return id++; };

  Object.prototype.id = function() {
    var newId = generateId();

    this.id = function() { return newId; };

    return newId;
  };

  var EventEmitter = require('events').EventEmitter;
  var inspect = require('util').inspect;
  var emit_ = EventEmitter.prototype.emit;
  EventEmitter.prototype.emit = function(name) {
    var args = Array.prototype.slice.call(arguments);
    if (!(this === process.stderr && name === 'drain')) {
      console.log("Event '%s' on '%s', arguments: %s",
                    name, this.id(), inspect(args.slice(1), false, 2));
    }
    return emit_.apply(this, args);
  };
})();