title: Is there a feature in Emacs for function call hierarchy
body: <p>I am maintaining someone else's code. The code is written in C using GCC 4.4.3 on Linux platform. However, the code jumps around a lot and its difficult to find out where all the functions are called from.</p>
  
  <p>In Visual Studio, there is a feature called 'Call Hierarchy' which will display where functions are called from and called to. Does Emacs (23.1.1) have any such feature?</p>