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

static int foo()
{
  void *p = malloc(10);
  memset(p, 0xca, 256);
  free(p);
  free(p);
}

static void
sighandler(int sig)
{
  foo();
}

int main()
{
  signal(SIGALRM, sighandler);

  alarm(1);

  sleep(10);
}