console.trace(label)

console.trace();
 
//运行结果：
Trace:
     at Object.<anonymous> (/home/byvoid/consoletrace.js : 1: 71)
     at Module._compile (module.js:441:26)
     at Object..js (module.js:459:10)
     at Module.load (module.js:348:31)
     at Function._load (module.js:308:12)
     at Array.0 (module.js:479:10)
     at EventEmitter._tickCallback (node.js:192:40)

Console.prototype.trace = function() {
  // TODO probably can to do this better with V8's debug object once that is
  // exposed.
  var err = new Error;
  err.name = 'Trace';
  err.message = util.format.apply(this, arguments);
  Error.captureStackTrace(err, arguments.callee);
  this.error(err.stack);
};