Angularjs: controller access area when a controller function is called from a directive

Question

I have a controller and a directive. In the directive's communication function, I call the controller function. When calling the controller function, I want to access the controller volume inside the controller function. But I get $ scope as undefined. How to access the current area. Here is the fiddle http://jsfiddle.net/9t294ox6/1/

I can access the scope using "this", but $ scope is undefined. Why is this happening?

This is my directive.

app.directive('myDirective', function() {
  return {
     scope: { someCtrlFn: '&callbackFn' },
     link: function(scope, element, attrs) {
         scope.someCtrlFn({arg1: 22});
     },
  }
});

my controller

function MyCtrl($scope) {
  $scope.ctrlFn = function(test) {
    //Want to access scope here
    debugger
    console.log(test);
  }
}

My html

<div ng-controller="MyCtrl">
<div my-directive callback-fn="ctrlFn(arg1)"></div>
</div>