Determining to which function a pointer is pointing in C?

Question

I have a pointer to function, assume any signature. And I have 5 different functions with same signature.

At run time one of them gets assigned to the pointer, and that

Answer 1

This is utterly awful and non-portable, but assuming:

1. You're on Linux or some similar, ELF-based system.
2. You're using dynamic linking.
3. The function is in a shared library or you used -rdynamic when linking.
4. Probably a lot of other assumptions you shouldn't be making...

You can obtain the name of a function by passing its address to the nonstandard dladdr function.