I don't know how to make this any clearer.
Assume this general example : you debug code and the code reaches a subroutine call. Next the debugger enters the subroutine code , and shows you the subroutine body , one instruction/statement at a time. If you don't want to go through the subroutine , you can press r , and the code continues it's execution after the subroutine call. That's the same thing I need help with the deep recursion subroutine call.