/* Demonstrate a SEGV
 * We can't use the handler to recover from it.
 */

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>

float *x = NULL;

// assume global variable x has been allocated. print its value.
void do_something() {
  printf( "in do_something\n" );
  // the error happens inside printf
  printf("%.2f\n", *x );
}

void seghandler(int signal) {
    printf("\nCaught seg fault %d\n", signal);
    exit(-1);
    // this doesn't help:
//     x = malloc( sizeof(int) );
//     *x = 1;
    //return;
}

int main(int argc, char *argv[]) {
    signal(SIGSEGV, seghandler);
    do_something();
    
    return 0;
}