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#include <signal.h>

#include <unistd.h>

#include <stdlib.h>

void foo (void);

void bar (void);

void subroutine (int);

void handler (int);

void have_a_very_merry_interrupt (void);

main ()

{

  foo ();   /* Put a breakpoint on foo() and call it to see a dummy frame */

  have_a_very_merry_interrupt ();

}

void

foo (void)

{

}

void

bar (void)

{

  char *nuller = 0;

  *nuller = 'a';      /* try to cause a segfault */

}

void

handler (int sig)

{

  subroutine (sig);

}

/* The first statement in subroutine () is a place for a breakpoint.

   Without it, the breakpoint is put on the while comparison and will

   be hit at each iteration. */

void

subroutine (int in)

{

  int count = in;

  while (count < 100)

    count++;

}

void

have_a_very_merry_interrupt (void)

{

  signal (SIGALRM, handler);

  alarm (1);

  sleep (2);  /* We'll receive that signal while sleeping */

}