segv-handler.c

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

void
segv()  // <--- never gets called
{
    fprintf(stderr, "segv\n");
    exit(0);
}

void
recur()
{
    recur();
}

int
main()
{
    stack_t ss;
    ss.ss_sp = malloc(65536);
    ss.ss_size = 65536;
    ss.ss_flags = 0;

    if(sigaltstack(&ss, NULL) < 0) {
        perror("sigaltstack");
        exit(1);
    }

    struct sigaction sa;

    sa.sa_flags = SA_SIGINFO;
    sigemptyset(&sa.sa_mask);

    sa.sa_sigaction = segv;

    if(sigaction(SIGSEGV, &sa, NULL) < 0) {
        perror("sigaction");
        exit(0);
    }

    if(sigaction(SIGBUS, &sa, NULL) < 0) {
        perror("sigaction");
        exit(0);
    }

    recur();
}