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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);
int
main ()
{
foo (); /* Put a breakpoint on foo() and call it to see a dummy frame */
have_a_very_merry_interrupt ();
return 0;
}
void
foo (void)
{
}
void
bar (void)
{
*(volatile char *)0 = 0; /* try to cause a segfault */
/* On MMU-less system, previous memory access to address zero doesn't
trigger a SIGSEGV. Trigger a SIGILL. Each arch should define its
own illegal instruction here. */
#if defined(__arm__)
asm(".word 0xf8f00000");
#elif defined(__TMS320C6X__)
asm(".word 0x56454313");
#else
#endif
}
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 */
}
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