6.48. Getting the Return or Frame Address of a Function
6.48 Getting the Return or Frame Address of a Function
These functions may be used to get information about the callers of a function.
— Built-in Function: void * __builtin_return_address (unsigned int level)
This function returns the return address of the current function, or of one of its callers. The level argument is number of frames to scan up the call stack. A value of
0yields the return address of the current function, a value of1yields the return address of the caller of the current function, and so forth. When inlining the expected behavior is that the function returns the address of the function that is returned to. To work around this behavior use thenoinlinefunction attribute.The level argument must be a constant integer.
On some machines it may be impossible to determine the return addr
