/* Test that gatching SIGSEGV gives the correct fault address.  */
#include <stdio.h>
#include <signal.h>
#include <sys/mman.h>
#include <stdio.h>

void * volatile p = NULL;
void * volatile block;

void foo(int n, siginfo_t *info, void *data)
{
  p = info->si_addr;
  printf ("%p\n", block);
  mprotect(block, sizeof(int), PROT_READ | PROT_WRITE);
}

int main()
{
  struct sigaction sa;

  p = &sa;
  memset (&sa, 0, sizeof(sa));
  sa.sa_sigaction = foo;
  sa.sa_flags = SA_SIGINFO;
  sigaction (SIGSEGV, &sa, NULL);
  block = mmap(NULL, sizeof(int), PROT_READ, MAP_SHARED|MAP_ANONYMOUS, 0, 0);
  if (block == MAP_FAILED)
    {
      printf ("mmap failed\n");
      return 1;
    }
  *(volatile int *) block = 42;
  sleep(1);
  if (p != block)
    printf ("FAIL: expected %p, got %p\n",  block, p);
  else
    printf ("OK\n");
  
  return 0;
}