/* 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;

}