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/* Basic test to make sure doing a longjmp to a jmpbuf with an invalid sp
is caught by the fortification code. */
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <setjmp.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static int do_test(void);
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
static jmp_buf b;
static void
__attribute__ ((noinline))
f (void)
{
char buf[1000];
asm volatile ("" : "=m" (buf));
if (setjmp (b) != 0)
{
puts ("second longjmp succeeded");
exit (1);
}
}
static bool expected_to_fail;
static void
handler (int sig)
{
if (expected_to_fail)
_exit (0);
else
{
static const char msg[] = "unexpected longjmp failure\n";
TEMP_FAILURE_RETRY (write (STDOUT_FILENO, msg, sizeof (msg) - 1));
_exit (1);
}
}
static int
do_test (void)
{
set_fortify_handler (handler);
expected_to_fail = false;
if (setjmp (b) == 0)
{
longjmp (b, 1);
/* NOTREACHED */
printf ("first longjmp returned\n");
return 1;
}
expected_to_fail = true;
f ();
longjmp (b, 1);
puts ("second longjmp returned");
return 1;
}
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