Minimal C/C++ program that segfaults? [duplicate]

Question

This question already has answers here:

What is the easiest way to make a C++ program crash? (29 answers)

Closed 5 years ago.

I'm trying to set up the way my server handles core dumps. In order to test it, I'd need a program that always segfaults.

Is there a simple example program that always segfaults?

Answer 1

main;

is portable, and segfault in 5chars.

Answer 2

main() { *(int *)0xdeadbeef = 37; } should do it.

Answer 3

try this:

long* ptr = 0x0; //-- you can also use other random values and likely you will segfault
printf("%f", *ptr);

Answer 4

You can try:

main() {
char *p = NULL;
char c = *p;
}

Answer 5

this should die:

int main() {
    char *die;
    printf("%d",(int *)die * 200);
    return 0;
}

edit:

int main() {
    char *die;
    int killer = 200;
    while(1) {
       printf("%d",(int *)die * killer);
       killer = killer * killer;
    }
    return 0;
}