Coming back to life after Segmentation Violation

Question

Is it possible to restore the normal execution flow of a C program, after the Segmentation Fault error?

struct A {
    int x;
};
A* a = 0;

a->x = 123; /         


        

Answer 1

This glib manual gives you a clear picture of how to write signal handlers.

A signal handler is just a function that you compile together with the rest
of the program. Instead of directly invoking the function, you use signal 
or sigaction to tell the operating system to call it when a signal arrives.
This is known as establishing the handler.

In your case you will have to wait for the SIGSEGV indicating a segmentation fault. The list of other signals can be found here.

Signal handlers are broadly classified into tow categories

1. You can have the handler function note that the signal arrived by tweaking some global data structures, and then return normally.
2. You can have the handler function terminate the program or transfer control to a point where it can recover from the situation that caused the signal.

SIGSEGV comes under program error signals