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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 ()
{
puts ("Starting up");
foo (); /* Put a breakpoint on foo() and call it to see a dummy frame */
have_a_very_merry_interrupt ();
puts ("Shutting down");
}
void
foo (void)
{
puts ("hi in foo");
}
void
bar (void)
{
char *nuller = 0;
puts ("hi in bar");
*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)
{
puts ("Waiting to get a signal");
signal (SIGALRM, handler);
alarm (1);
sleep (2); /* We'll receive that signal while sleeping */
}
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