[Gnash] function tracing

[pintoo chikhaliya]

I want to enable function tracing in gnash.

First of all, I tried to use Debugging API provided with Gnash. But it gives segementation fault.
Also I need to make changes in source code to enable/disable debugging.

Second method is to use GCC's -finstrument-functions to call particular functions 
void __cyg_profile_func_enter( void *this, void *callsite )
{
  /* Function Entry Address */
  fprintf(fp, "E%p\n", (int *)this);
}


void __cyg_profile_func_exit( void *this, void *callsite )
{
  /* Function Exit Address */
  fprintf(fp, "X%p\n", (int *)this);
}

after immediately entering and before exiting our functions.
You can find more info on this link http://www-128.ibm.com/developerworks/linux/library/l-graphvis/

Even though I follow all the steps mentioned in the article, the  function tracing does not work.

My questions are : Is someone using tracing mechanism in gnash or for linux based  development?

How can I instrument my one file  in all the source files?

Thanks a lot
Pintoo