title: Translating address to function name
body: <p>Say I have an address acquired by <code>__builtin_return_address(0)</code>.
  Sometime later I want to translate it to a coreesponding function name.</p>
  
  <p><code>There's dladdr(3)</code> which works only for dynamic libraries.
  Is there any way to receive function of <strong>any</strong> symbol (maybe by libunwind, backrace_symbol() etc.)?</p>