[thirdparty/glibc.git] / debug / test-strcpy_chk.c

/* Test and measure __strcpy_chk functions.
   Copyright (C) 1999, 2002, 2003, 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Jakub Jelinek <jakub@redhat.com>, 1999.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef STRCPY_RESULT
# define STRCPY_RESULT(dst, len) dst
# define TEST_MAIN
# include "../string/test-string.h"

extern void __attribute__ ((noreturn)) __chk_fail (void);
char *simple_strcpy_chk (char *, const char *, size_t);
extern char *normal_strcpy (char *, const char *, size_t)
  __asm ("strcpy");
extern char *__strcpy_chk (char *, const char *, size_t);

IMPL (simple_strcpy_chk, 0)
IMPL (normal_strcpy, 1)
IMPL (__strcpy_chk, 2)

char *
simple_strcpy_chk (char *dst, const char *src, size_t len)
{
  char *ret = dst;
  if (! len)
    __chk_fail ();
  while ((*dst++ = *src++) != '\0')
    if (--len == 0)
      __chk_fail ();
  return ret;
}
#endif

#include <fcntl.h>
#include <paths.h>
#include <setjmp.h>
#include <signal.h>

volatile int chk_fail_ok;
jmp_buf chk_fail_buf;

static void
handler (int sig)
{
  if (chk_fail_ok)
    {
      chk_fail_ok = 0;
      longjmp (chk_fail_buf, 1);
    }
  else
    _exit (127);
}

typedef char *(*proto_t) (char *, const char *, size_t);

static void
do_one_test (impl_t *impl, char *dst, const char *src,
	     size_t len, size_t dlen)
{
  char *res;
  if (dlen <= len)
    {
      if (impl->test == 1)
	return;

      chk_fail_ok = 1;
      if (setjmp (chk_fail_buf) == 0)
	{
	  res = CALL (impl, dst, src, dlen);
	  printf ("*** Function %s (%zd; %zd) did not __chk_fail\n",
		  impl->name, len, dlen);
	  chk_fail_ok = 0;
	  ret = 1;
	}
      return;
    }
  else
    res = CALL (impl, dst, src, dlen);

  if (res != STRCPY_RESULT (dst, len))
    {
      printf ("Wrong result in function %s %p %p\n", impl->name,
	      res, STRCPY_RESULT (dst, len));
      ret = 1;
      return;
    }

  if (strcmp (dst, src) != 0)
    {
      printf ("Wrong result in function %s dst \"%s\" src \"%s\"\n",
	      impl->name, dst, src);
      ret = 1;
      return;
    }

  if (HP_TIMING_AVAIL)
    {
      hp_timing_t start __attribute ((unused));
      hp_timing_t stop __attribute ((unused));;
      hp_timing_t best_time = ~ (hp_timing_t) 0;
      size_t i;

      for (i = 0; i < 32; ++i)
	{
	  HP_TIMING_NOW (start);
	  CALL (impl, dst, src, dlen);
	  HP_TIMING_NOW (stop);
	  HP_TIMING_BEST (best_time, start, stop);
	}

      printf ("\t%zd", (size_t) best_time);
    }
}

static void
do_test (size_t align1, size_t align2, size_t len, size_t dlen, int max_char)
{
  size_t i;
  char *s1, *s2;

  align1 &= 7;
  if (align1 + len >= page_size)
    return;

  align2 &= 7;
  if (align2 + len >= page_size)
    return;

  s1 = (char *) buf1 + align1;
  s2 = (char *) buf2 + align2;

  for (i = 0; i < len; i++)
    s1[i] = 32 + 23 * i % (max_char - 32);
  s1[len] = 0;

  if (HP_TIMING_AVAIL && dlen > len)
    printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, s2, s1, len, dlen);

  if (HP_TIMING_AVAIL && dlen > len)
    putchar ('\n');
}

static void
do_random_tests (void)
{
  size_t i, j, n, align1, align2, len, dlen;
  unsigned char *p1 = buf1 + page_size - 512;
  unsigned char *p2 = buf2 + page_size - 512;
  unsigned char *res;

  for (n = 0; n < ITERATIONS; n++)
    {
      align1 = random () & 31;
      if (random () & 1)
	align2 = random () & 31;
      else
	align2 = align1 + (random () & 24);
      len = random () & 511;
      j = align1;
      if (align2 > j)
	j = align2;
      if (len + j >= 511)
	len = 510 - j - (random () & 7);
      j = len + align1 + 64;
      if (j > 512)
	j = 512;
      for (i = 0; i < j; i++)
	{
	  if (i == len + align1)
	    p1[i] = 0;
	  else
	    {
	      p1[i] = random () & 255;
	      if (i >= align1 && i < len + align1 && !p1[i])
		p1[i] = (random () & 127) + 3;
	    }
	}

      switch (random () & 7)
	{
	case 0:
	  dlen = len - (random () & 31);
	  if (dlen > len)
	    dlen = len;
	  break;
	case 1:
	  dlen = (size_t) -1;
	  break;
	case 2:
	  dlen = len + 1 + (random () & 65535);
	  break;
	case 3:
	  dlen = len + 1 + (random () & 255);
	  break;
	case 4:
	  dlen = len + 1 + (random () & 31);
	  break;
	case 5:
	  dlen = len + 1 + (random () & 7);
	  break;
	case 6:
	  dlen = len + 1 + (random () & 3);
	  break;
	default:
	  dlen = len + 1;
	  break;
	}

      FOR_EACH_IMPL (impl, 1)
	{
	  if (dlen <= len)
	    {
	      if (impl->test != 1)
		{
		  chk_fail_ok = 1;
		  if (setjmp (chk_fail_buf) == 0)
		    {
		      res = (unsigned char *)
			    CALL (impl, (char *) p2 + align2,
				  (char *) p1 + align1, dlen);
		      printf ("Iteration %zd - did not __chk_fail\n", n);
		      chk_fail_ok = 0;
		      ret = 1;
		    }
		}
	      continue;
	    }
	  memset (p2 - 64, '\1', 512 + 64);
	  res = (unsigned char *)
		CALL (impl, (char *) p2 + align2, (char *) p1 + align1, dlen);
	  if (res != STRCPY_RESULT (p2 + align2, len))
	    {
	      printf ("\
Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p\n",
		      n, impl->name, align1, align2, len, res,
		      STRCPY_RESULT (p2 + align2, len));
	      ret = 1;
	    }
	  for (j = 0; j < align2 + 64; ++j)
	    {
	      if (p2[j - 64] != '\1')
		{
		  printf ("\
Iteration %zd - garbage before, %s (%zd, %zd, %zd)\n",
			  n, impl->name, align1, align2, len);
		  ret = 1;
		  break;
		}
	    }
	  for (j = align2 + len + 1; j < 512; ++j)
	    {
	      if (p2[j] != '\1')
		{
		  printf ("\
Iteration %zd - garbage after, %s (%zd, %zd, %zd)\n",
			  n, impl->name, align1, align2, len);
		  ret = 1;
		  break;
		}
	    }
	  if (memcmp (p1 + align1, p2 + align2, len + 1))
	    {
	      printf ("\
Iteration %zd - different strings, %s (%zd, %zd, %zd)\n",
		      n, impl->name, align1, align2, len);
	      ret = 1;
	    }
	}
    }
}

int
test_main (void)
{
  size_t i;

  struct sigaction sa;
  sa.sa_handler = handler;
  sa.sa_flags = 0;
  sigemptyset (&sa.sa_mask);

  sigaction (SIGABRT, &sa, NULL);

  /* Avoid all the buffer overflow messages on stderr.  */
  int fd = open (_PATH_DEVNULL, O_WRONLY);
  if (fd == -1)
    close (STDERR_FILENO);
  else
    {
      dup2 (fd, STDERR_FILENO);
      close (fd);
    }
  setenv ("LIBC_FATAL_STDERR_", "1", 1);

  test_init ();

  printf ("%23s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

  for (i = 0; i < 16; ++i)
    {
      do_test (0, 0, i, i + 1, 127);
      do_test (0, 0, i, i + 1, 255);
      do_test (0, i, i, i + 1, 127);
      do_test (i, 0, i, i + 1, 255);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (0, 0, 8 << i, (8 << i) + 1, 127);
      do_test (8 - i, 2 * i, (8 << i), (8 << i) + 1, 127);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (i, 2 * i, (8 << i), (8 << i) + 1, 127);
      do_test (2 * i, i, (8 << i), (8 << i) + 1, 255);
      do_test (i, i, (8 << i), (8 << i) + 1, 127);
      do_test (i, i, (8 << i), (8 << i) + 1, 255);
    }

  for (i = 0; i < 16; ++i)
    {
      do_test (0, 0, i, i + 256, 127);
      do_test (0, 0, i, i + 256, 255);
      do_test (0, i, i, i + 256, 127);
      do_test (i, 0, i, i + 256, 255);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (0, 0, 8 << i, (8 << i) + 256, 127);
      do_test (8 - i, 2 * i, (8 << i), (8 << i) + 256, 127);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (i, 2 * i, (8 << i), (8 << i) + 256, 127);
      do_test (2 * i, i, (8 << i), (8 << i) + 256, 255);
      do_test (i, i, (8 << i), (8 << i) + 256, 127);
      do_test (i, i, (8 << i), (8 << i) + 256, 255);
    }

  for (i = 0; i < 16; ++i)
    {
      do_test (0, 0, i, i, 127);
      do_test (0, 0, i, i + 2, 255);
      do_test (0, i, i, i + 3, 127);
      do_test (i, 0, i, i + 4, 255);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (0, 0, 8 << i, (8 << i) - 15, 127);
      do_test (8 - i, 2 * i, (8 << i), (8 << i) + 5, 127);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (i, 2 * i, (8 << i), (8 << i) + i, 127);
      do_test (2 * i, i, (8 << i), (8 << i) + (i - 1), 255);
      do_test (i, i, (8 << i), (8 << i) + i + 2, 127);
      do_test (i, i, (8 << i), (8 << i) + i + 3, 255);
    }

  do_random_tests ();
  return ret;
}

#include "../test-skeleton.c"
Commit	Line	Data
b5cc329c UD	1	/* Test and measure __strcpy_chk functions.
	2	Copyright (C) 1999, 2002, 2003, 2004 Free Software Foundation, Inc.
	3	This file is part of the GNU C Library.
	4	Written by Jakub Jelinek <jakub@redhat.com>, 1999.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
	17	License along with the GNU C Library; if not, write to the Free
	18	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	19	02111-1307 USA. */
	20
	21	#ifndef STRCPY_RESULT
	22	# define STRCPY_RESULT(dst, len) dst
	23	# define TEST_MAIN
	24	# include "../string/test-string.h"
	25
	26	extern void __attribute__ ((noreturn)) __chk_fail (void);
	27	char simple_strcpy_chk (char , const char *, size_t);
	28	extern char normal_strcpy (char , const char *, size_t)
	29	__asm ("strcpy");
	30	extern char __strcpy_chk (char , const char *, size_t);
	31
	32	IMPL (simple_strcpy_chk, 0)
	33	IMPL (normal_strcpy, 1)
	34	IMPL (__strcpy_chk, 2)
	35
	36	char *
	37	simple_strcpy_chk (char dst, const char src, size_t len)
	38	{
	39	char *ret = dst;
	40	if (! len)
	41	__chk_fail ();
	42	while ((dst++ = src++) != '\0')
	43	if (--len == 0)
	44	__chk_fail ();
	45	return ret;
	46	}
	47	#endif
	48
a9055cab UD	49	#include <fcntl.h>
a9055cab UD	50	#include <paths.h>
b5cc329c UD	51	#include <setjmp.h>
	52	#include <signal.h>
	53
	54	volatile int chk_fail_ok;
	55	jmp_buf chk_fail_buf;
	56
	57	static void
	58	handler (int sig)
	59	{
	60	if (chk_fail_ok)
	61	{
	62	chk_fail_ok = 0;
	63	longjmp (chk_fail_buf, 1);
	64	}
	65	else
	66	_exit (127);
	67	}
	68
	69	typedef char (proto_t) (char , const char , size_t);
	70
	71	static void
	72	do_one_test (impl_t impl, char dst, const char *src,
	73	size_t len, size_t dlen)
	74	{
	75	char *res;
	76	if (dlen <= len)
	77	{
	78	if (impl->test == 1)
	79	return;
	80
	81	chk_fail_ok = 1;
	82	if (setjmp (chk_fail_buf) == 0)
	83	{
	84	res = CALL (impl, dst, src, dlen);
a9055cab UD	85	printf ("*** Function %s (%zd; %zd) did not __chk_fail\n",
a9055cab UD	86	impl->name, len, dlen);
b5cc329c UD	87	chk_fail_ok = 0;
	88	ret = 1;
	89	}
	90	return;
	91	}
	92	else
	93	res = CALL (impl, dst, src, dlen);
	94
	95	if (res != STRCPY_RESULT (dst, len))
	96	{
a9055cab UD	97	printf ("Wrong result in function %s %p %p\n", impl->name,
a9055cab UD	98	res, STRCPY_RESULT (dst, len));
b5cc329c UD	99	ret = 1;
	100	return;
	101	}
	102
	103	if (strcmp (dst, src) != 0)
	104	{
a9055cab UD	105	printf ("Wrong result in function %s dst \"%s\" src \"%s\"\n",
a9055cab UD	106	impl->name, dst, src);
b5cc329c UD	107	ret = 1;
	108	return;
	109	}
	110
	111	if (HP_TIMING_AVAIL)
	112	{
	113	hp_timing_t start __attribute ((unused));
	114	hp_timing_t stop __attribute ((unused));;
	115	hp_timing_t best_time = ~ (hp_timing_t) 0;
	116	size_t i;
	117
	118	for (i = 0; i < 32; ++i)
	119	{
	120	HP_TIMING_NOW (start);
	121	CALL (impl, dst, src, dlen);
	122	HP_TIMING_NOW (stop);
	123	HP_TIMING_BEST (best_time, start, stop);
	124	}
	125
	126	printf ("\t%zd", (size_t) best_time);
	127	}
	128	}
	129
	130	static void
	131	do_test (size_t align1, size_t align2, size_t len, size_t dlen, int max_char)
	132	{
	133	size_t i;
	134	char s1, s2;
	135
	136	align1 &= 7;
	137	if (align1 + len >= page_size)
	138	return;
	139
	140	align2 &= 7;
	141	if (align2 + len >= page_size)
	142	return;
	143
701666b7 UD	144	s1 = (char *) buf1 + align1;
701666b7 UD	145	s2 = (char *) buf2 + align2;
b5cc329c UD	146
	147	for (i = 0; i < len; i++)
	148	s1[i] = 32 + 23 * i % (max_char - 32);
	149	s1[len] = 0;
	150
	151	if (HP_TIMING_AVAIL && dlen > len)
	152	printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
	153
	154	FOR_EACH_IMPL (impl, 0)
	155	do_one_test (impl, s2, s1, len, dlen);
	156
	157	if (HP_TIMING_AVAIL && dlen > len)
	158	putchar ('\n');
	159	}
	160
	161	static void
	162	do_random_tests (void)
	163	{
	164	size_t i, j, n, align1, align2, len, dlen;
	165	unsigned char *p1 = buf1 + page_size - 512;
	166	unsigned char *p2 = buf2 + page_size - 512;
	167	unsigned char *res;
	168
	169	for (n = 0; n < ITERATIONS; n++)
	170	{
	171	align1 = random () & 31;
	172	if (random () & 1)
	173	align2 = random () & 31;
	174	else
	175	align2 = align1 + (random () & 24);
	176	len = random () & 511;
	177	j = align1;
	178	if (align2 > j)
	179	j = align2;
	180	if (len + j >= 511)
	181	len = 510 - j - (random () & 7);
	182	j = len + align1 + 64;
	183	if (j > 512)
	184	j = 512;
	185	for (i = 0; i < j; i++)
	186	{
	187	if (i == len + align1)
	188	p1[i] = 0;
	189	else
	190	{
	191	p1[i] = random () & 255;
	192	if (i >= align1 && i < len + align1 && !p1[i])
	193	p1[i] = (random () & 127) + 3;
	194	}
	195	}
	196
	197	switch (random () & 7)
	198	{
	199	case 0:
	200	dlen = len - (random () & 31);
	201	if (dlen > len)
	202	dlen = len;
	203	break;
	204	case 1:
	205	dlen = (size_t) -1;
	206	break;
	207	case 2:
	208	dlen = len + 1 + (random () & 65535);
	209	break;
210	case 3:
211	dlen = len + 1 + (random () & 255);
212	break;
213	case 4:
214	dlen = len + 1 + (random () & 31);
215	break;
216	case 5:
217	dlen = len + 1 + (random () & 7);
218	break;
219	case 6:
220	dlen = len + 1 + (random () & 3);
221	break;
222	default:
223	dlen = len + 1;
224	break;
225	}
226
227	FOR_EACH_IMPL (impl, 1)
228	{
229	if (dlen <= len)
230	{
231	if (impl->test != 1)
232	{
233	chk_fail_ok = 1;
234	if (setjmp (chk_fail_buf) == 0)
235	{
701666b7 UD	236	res = (unsigned char *)
	237	CALL (impl, (char *) p2 + align2,
	238	(char *) p1 + align1, dlen);
a9055cab	239	printf ("Iteration %zd - did not __chk_fail\n", n);
b5cc329c UD	240	chk_fail_ok = 0;
	241	ret = 1;
	242	}
	243	}
	244	continue;
	245	}
	246	memset (p2 - 64, '\1', 512 + 64);
701666b7 UD	247	res = (unsigned char *)
701666b7 UD	248	CALL (impl, (char ) p2 + align2, (char ) p1 + align1, dlen);
b5cc329c UD	249	if (res != STRCPY_RESULT (p2 + align2, len))
b5cc329c UD	250	{
a9055cab UD	251	printf ("\
	252	Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p\n",
	253	n, impl->name, align1, align2, len, res,
	254	STRCPY_RESULT (p2 + align2, len));
b5cc329c UD	255	ret = 1;
	256	}
	257	for (j = 0; j < align2 + 64; ++j)
	258	{
	259	if (p2[j - 64] != '\1')
	260	{
a9055cab UD	261	printf ("\
	262	Iteration %zd - garbage before, %s (%zd, %zd, %zd)\n",
	263	n, impl->name, align1, align2, len);
b5cc329c UD	264	ret = 1;
	265	break;
	266	}
	267	}
	268	for (j = align2 + len + 1; j < 512; ++j)
	269	{
	270	if (p2[j] != '\1')
	271	{
a9055cab UD	272	printf ("\
	273	Iteration %zd - garbage after, %s (%zd, %zd, %zd)\n",
	274	n, impl->name, align1, align2, len);
b5cc329c UD	275	ret = 1;
	276	break;
	277	}
	278	}
	279	if (memcmp (p1 + align1, p2 + align2, len + 1))
	280	{
a9055cab UD	281	printf ("\
	282	Iteration %zd - different strings, %s (%zd, %zd, %zd)\n",
	283	n, impl->name, align1, align2, len);
b5cc329c UD	284	ret = 1;
	285	}
	286	}
	287	}
	288	}
	289
	290	int
	291	test_main (void)
	292	{
	293	size_t i;
	294
	295	struct sigaction sa;
	296	sa.sa_handler = handler;
	297	sa.sa_flags = 0;
	298	sigemptyset (&sa.sa_mask);
	299
	300	sigaction (SIGABRT, &sa, NULL);
	301
a9055cab UD	302	/* Avoid all the buffer overflow messages on stderr. */
	303	int fd = open (_PATH_DEVNULL, O_WRONLY);
	304	if (fd == -1)
	305	close (STDERR_FILENO);
	306	else
	307	{
	308	dup2 (fd, STDERR_FILENO);
	309	close (fd);
	310	}
	311	setenv ("LIBC_FATAL_STDERR_", "1", 1);
	312
b5cc329c UD	313	test_init ();
	314
	315	printf ("%23s", "");
	316	FOR_EACH_IMPL (impl, 0)
	317	printf ("\t%s", impl->name);
	318	putchar ('\n');
	319
	320	for (i = 0; i < 16; ++i)
	321	{
	322	do_test (0, 0, i, i + 1, 127);
	323	do_test (0, 0, i, i + 1, 255);
	324	do_test (0, i, i, i + 1, 127);
	325	do_test (i, 0, i, i + 1, 255);
	326	}
	327
	328	for (i = 1; i < 8; ++i)
	329	{
	330	do_test (0, 0, 8 << i, (8 << i) + 1, 127);
	331	do_test (8 - i, 2 * i, (8 << i), (8 << i) + 1, 127);
	332	}
	333
	334	for (i = 1; i < 8; ++i)
	335	{
	336	do_test (i, 2 * i, (8 << i), (8 << i) + 1, 127);
	337	do_test (2 * i, i, (8 << i), (8 << i) + 1, 255);
	338	do_test (i, i, (8 << i), (8 << i) + 1, 127);
	339	do_test (i, i, (8 << i), (8 << i) + 1, 255);
	340	}
	341
	342	for (i = 0; i < 16; ++i)
	343	{
	344	do_test (0, 0, i, i + 256, 127);
	345	do_test (0, 0, i, i + 256, 255);
	346	do_test (0, i, i, i + 256, 127);
	347	do_test (i, 0, i, i + 256, 255);
	348	}
	349
	350	for (i = 1; i < 8; ++i)
	351	{
	352	do_test (0, 0, 8 << i, (8 << i) + 256, 127);
	353	do_test (8 - i, 2 * i, (8 << i), (8 << i) + 256, 127);
	354	}
	355
	356	for (i = 1; i < 8; ++i)
	357	{
	358	do_test (i, 2 * i, (8 << i), (8 << i) + 256, 127);
	359	do_test (2 * i, i, (8 << i), (8 << i) + 256, 255);
	360	do_test (i, i, (8 << i), (8 << i) + 256, 127);
	361	do_test (i, i, (8 << i), (8 << i) + 256, 255);
	362	}
	363
	364	for (i = 0; i < 16; ++i)
	365	{
	366	do_test (0, 0, i, i, 127);
	367	do_test (0, 0, i, i + 2, 255);
	368	do_test (0, i, i, i + 3, 127);
	369	do_test (i, 0, i, i + 4, 255);
	370	}
	371
	372	for (i = 1; i < 8; ++i)
	373	{
	374	do_test (0, 0, 8 << i, (8 << i) - 15, 127);
	375	do_test (8 - i, 2 * i, (8 << i), (8 << i) + 5, 127);
	376	}
377
378	for (i = 1; i < 8; ++i)
379	{
380	do_test (i, 2 * i, (8 << i), (8 << i) + i, 127);
381	do_test (2 * i, i, (8 << i), (8 << i) + (i - 1), 255);
382	do_test (i, i, (8 << i), (8 << i) + i + 2, 127);
383	do_test (i, i, (8 << i), (8 << i) + i + 3, 255);
384	}
385
386	do_random_tests ();
387	return ret;
388	}
389
390	#include "../test-skeleton.c"