[thirdparty/glibc.git] / string / test-memmove.c

/* Test and measure memmove functions.
   Copyright (C) 1999-2017 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, see
   <http://www.gnu.org/licenses/>.  */

#define TEST_MAIN
#ifdef TEST_BCOPY
# define TEST_NAME "bcopy"
#else
# define TEST_NAME "memmove"
#endif
#include "test-string.h"

char *simple_memmove (char *, const char *, size_t);

#ifdef TEST_BCOPY
typedef void (*proto_t) (const char *, char *, size_t);
void simple_bcopy (const char *, char *, size_t);

IMPL (simple_bcopy, 0)
IMPL (bcopy, 1)

void
simple_bcopy (const char *src, char *dst, size_t n)
{
  simple_memmove (dst, src, n);
}
#else
typedef char *(*proto_t) (char *, const char *, size_t);

IMPL (simple_memmove, 0)
IMPL (memmove, 1)
#endif

char *
inhibit_loop_to_libcall
simple_memmove (char *dst, const char *src, size_t n)
{
  char *ret = dst;
  if (src < dst)
    {
      dst += n;
      src += n;
      while (n--)
	*--dst = *--src;
    }
  else
    while (n--)
      *dst++ = *src++;
  return ret;
}

static void
do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,
	     size_t len)
{
  /* This also clears the destination buffer set by the previous run.  */
  memcpy (src, orig_src, len);
#ifdef TEST_BCOPY
  CALL (impl, src, dst, len);
#else
  char *res;

  res = CALL (impl, dst, src, len);
  if (res != dst)
    {
      error (0, 0, "Wrong result in function %s %p %p", impl->name,
	     res, dst);
      ret = 1;
      return;
    }
#endif

  if (memcmp (dst, orig_src, len) != 0)
    {
      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
	     impl->name, dst, src);
      ret = 1;
      return;
    }
}

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

  align1 &= 63;
  if (align1 + len >= page_size)
    return;

  align2 &= 63;
  if (align2 + len >= page_size)
    return;

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

  for (i = 0, j = 1; i < len; i++, j += 23)
    s1[i] = j;

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
}

static void
do_random_tests (void)
{
  size_t i, n, align1, align2, len, size;
  size_t srcstart, srcend, dststart, dstend;
  int c;
  unsigned char *p1, *p2;
#ifndef TEST_BCOPY
  unsigned char *res;
#endif

  for (n = 0; n < ITERATIONS; n++)
    {
      if ((random () & 255) == 0)
	size = 65536;
      else
	size = 512;
      if (size > page_size)
	size = page_size;
      if ((random () & 3) == 0)
	{
	  len = random () & (size - 1);
	  align1 = size - len - (random () & 31);
	  align2 = size - len - (random () & 31);
	  if (align1 > size)
	    align1 = 0;
	  if (align2 > size)
	    align2 = 0;
	}
      else
	{
	  align1 = random () & (size / 2 - 1);
	  align2 = random () & (size / 2 - 1);
	  len = random () & (size - 1);
	  if (align1 + len > size)
	    align1 = size - len;
	  if (align2 + len > size)
	    align2 = size - len;
	}

      p1 = buf1 + page_size - size;
      p2 = buf2 + page_size - size;
      c = random () & 255;
      srcend = align1 + len + 256;
      if (srcend > size)
	srcend = size;
      if (align1 > 256)
	srcstart = align1 - 256;
      else
	srcstart = 0;
      for (i = srcstart; i < srcend; ++i)
	p1[i] = random () & 255;
      dstend = align2 + len + 256;
      if (dstend > size)
	dstend = size;
      if (align2 > 256)
	dststart = align2 - 256;
      else
	dststart = 0;

      FOR_EACH_IMPL (impl, 1)
	{
	  memset (p2 + dststart, c, dstend - dststart);
	  memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
#ifdef TEST_BCOPY
	  CALL (impl, (char *) (p2 + align1), (char *) (p2 + align2), len);
#else
	  res = (unsigned char *) CALL (impl,
					(char *) (p2 + align2),
					(char *) (p2 + align1), len);
	  if (res != p2 + align2)
	    {
	      error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
		     n, impl->name, align1, align2, len, res, p2 + align2);
	      ret = 1;
	    }
#endif
	  if (memcmp (p1 + align1, p2 + align2, len))
	    {
	      error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
		     n, impl->name, align1, align2, len);
	      ret = 1;
	    }
	  for (i = dststart; i < dstend; ++i)
	    {
	      if (i >= align2 && i < align2 + len)
		{
		  i = align2 + len - 1;
		  continue;
		}
	      if (i >= srcstart && i < srcend)
		{
		  i = srcend - 1;
		  continue;
		}
	      if (p2[i] != c)
		{
		  error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
			 n, impl->name, align1, align2, len);
		  ret = 1;
		  break;
		}
	    }

	  if (srcstart < align2
	      && memcmp (p2 + srcstart, p1 + srcstart,
			 (srcend > align2 ? align2 : srcend) - srcstart))
	    {
	      error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
		     n, impl->name, align1, align2, len);
	      ret = 1;
	      break;
	    }

	  i = srcstart > align2 + len ? srcstart : align2 + len;
	  if (srcend > align2 + len
	      && memcmp (p2 + i, p1 + i, srcend - i))
	    {
	      error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
		     n, impl->name, align1, align2, len);
	      ret = 1;
	      break;
	    }
	}
    }
}

int
test_main (void)
{
  size_t i;

  test_init ();

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

  for (i = 0; i < 14; ++i)
    {
      do_test (0, 32, 1 << i);
      do_test (32, 0, 1 << i);
      do_test (0, i, 1 << i);
      do_test (i, 0, 1 << i);
    }

  for (i = 0; i < 32; ++i)
    {
      do_test (0, 32, i);
      do_test (32, 0, i);
      do_test (0, i, i);
      do_test (i, 0, i);
    }

  for (i = 3; i < 32; ++i)
    {
      if ((i & (i - 1)) == 0)
	continue;
      do_test (0, 32, 16 * i);
      do_test (32, 0, 16 * i);
      do_test (0, i, 16 * i);
      do_test (i, 0, 16 * i);
    }

  do_random_tests ();
  return ret;
}

#include "../test-skeleton.c"
Commit	Line	Data
58ef9ef7	1	/* Test and measure memmove functions.
bfff8b1b	2	Copyright (C) 1999-2017 Free Software Foundation, Inc.
58ef9ef7 RM	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
59ba27a6 PE	17	License along with the GNU C Library; if not, see
59ba27a6 PE	18	<http://www.gnu.org/licenses/>. */
58ef9ef7 RM	19
58ef9ef7 RM	20	#define TEST_MAIN
69f07e5f L	21	#ifdef TEST_BCOPY
	22	# define TEST_NAME "bcopy"
	23	#else
	24	# define TEST_NAME "memmove"
	25	#endif
58ef9ef7 RM	26	#include "test-string.h"
58ef9ef7 RM	27
58ef9ef7 RM	28	char simple_memmove (char , const char *, size_t);
58ef9ef7 RM	29
9a387d1f L	30	#ifdef TEST_BCOPY
	31	typedef void (proto_t) (const char , char *, size_t);
	32	void simple_bcopy (const char , char , size_t);
	33
	34	IMPL (simple_bcopy, 0)
	35	IMPL (bcopy, 1)
	36
	37	void
	38	simple_bcopy (const char src, char dst, size_t n)
	39	{
	40	simple_memmove (dst, src, n);
	41	}
	42	#else
	43	typedef char (proto_t) (char , const char , size_t);
	44
58ef9ef7 RM	45	IMPL (simple_memmove, 0)
58ef9ef7 RM	46	IMPL (memmove, 1)
9a387d1f	47	#endif
58ef9ef7 RM	48
58ef9ef7 RM	49	char *
85c2e611	50	inhibit_loop_to_libcall
58ef9ef7 RM	51	simple_memmove (char dst, const char src, size_t n)
	52	{
	53	char *ret = dst;
	54	if (src < dst)
	55	{
	56	dst += n;
	57	src += n;
	58	while (n--)
	59	--dst = --src;
	60	}
	61	else
	62	while (n--)
	63	dst++ = src++;
	64	return ret;
	65	}
	66
	67	static void
	68	do_one_test (impl_t impl, char dst, char src, const char orig_src,
	69	size_t len)
	70	{
447720b0	71	/* This also clears the destination buffer set by the previous run. */
9a387d1f L	72	memcpy (src, orig_src, len);
	73	#ifdef TEST_BCOPY
	74	CALL (impl, src, dst, len);
	75	#else
58ef9ef7 RM	76	char *res;
58ef9ef7 RM	77
58ef9ef7 RM	78	res = CALL (impl, dst, src, len);
	79	if (res != dst)
	80	{
	81	error (0, 0, "Wrong result in function %s %p %p", impl->name,
	82	res, dst);
	83	ret = 1;
	84	return;
	85	}
9a387d1f	86	#endif
58ef9ef7 RM	87
	88	if (memcmp (dst, orig_src, len) != 0)
	89	{
	90	error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
	91	impl->name, dst, src);
	92	ret = 1;
	93	return;
	94	}
58ef9ef7 RM	95	}
	96
	97	static void
	98	do_test (size_t align1, size_t align2, size_t len)
	99	{
	100	size_t i, j;
	101	char s1, s2;
	102
	103	align1 &= 63;
	104	if (align1 + len >= page_size)
	105	return;
	106
	107	align2 &= 63;
	108	if (align2 + len >= page_size)
	109	return;
	110
0317eaec RM	111	s1 = (char *) (buf1 + align1);
0317eaec RM	112	s2 = (char *) (buf2 + align2);
58ef9ef7 RM	113
	114	for (i = 0, j = 1; i < len; i++, j += 23)
	115	s1[i] = j;
	116
58ef9ef7	117	FOR_EACH_IMPL (impl, 0)
0317eaec	118	do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
58ef9ef7 RM	119	}
	120
	121	static void
	122	do_random_tests (void)
	123	{
	124	size_t i, n, align1, align2, len, size;
	125	size_t srcstart, srcend, dststart, dstend;
	126	int c;
	127	unsigned char p1, p2;
9a387d1f	128	#ifndef TEST_BCOPY
58ef9ef7	129	unsigned char *res;
9a387d1f	130	#endif
58ef9ef7 RM	131
	132	for (n = 0; n < ITERATIONS; n++)
	133	{
	134	if ((random () & 255) == 0)
	135	size = 65536;
	136	else
	137	size = 512;
	138	if (size > page_size)
	139	size = page_size;
	140	if ((random () & 3) == 0)
	141	{
	142	len = random () & (size - 1);
	143	align1 = size - len - (random () & 31);
	144	align2 = size - len - (random () & 31);
	145	if (align1 > size)
	146	align1 = 0;
	147	if (align2 > size)
	148	align2 = 0;
	149	}
	150	else
	151	{
	152	align1 = random () & (size / 2 - 1);
	153	align2 = random () & (size / 2 - 1);
	154	len = random () & (size - 1);
	155	if (align1 + len > size)
	156	align1 = size - len;
	157	if (align2 + len > size)
	158	align2 = size - len;
	159	}
	160
	161	p1 = buf1 + page_size - size;
	162	p2 = buf2 + page_size - size;
	163	c = random () & 255;
	164	srcend = align1 + len + 256;
	165	if (srcend > size)
	166	srcend = size;
	167	if (align1 > 256)
	168	srcstart = align1 - 256;
	169	else
	170	srcstart = 0;
	171	for (i = srcstart; i < srcend; ++i)
	172	p1[i] = random () & 255;
	173	dstend = align2 + len + 256;
	174	if (dstend > size)
	175	dstend = size;
	176	if (align2 > 256)
	177	dststart = align2 - 256;
	178	else
	179	dststart = 0;
	180
	181	FOR_EACH_IMPL (impl, 1)
	182	{
	183	memset (p2 + dststart, c, dstend - dststart);
	184	memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
9a387d1f L	185	#ifdef TEST_BCOPY
	186	CALL (impl, (char ) (p2 + align1), (char ) (p2 + align2), len);
	187	#else
0317eaec RM	188	res = (unsigned char *) CALL (impl,
	189	(char *) (p2 + align2),
	190	(char *) (p2 + align1), len);
58ef9ef7 RM	191	if (res != p2 + align2)
	192	{
	193	error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
	194	n, impl->name, align1, align2, len, res, p2 + align2);
	195	ret = 1;
	196	}
9a387d1f	197	#endif
58ef9ef7 RM	198	if (memcmp (p1 + align1, p2 + align2, len))
	199	{
	200	error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
	201	n, impl->name, align1, align2, len);
	202	ret = 1;
	203	}
	204	for (i = dststart; i < dstend; ++i)
	205	{
	206	if (i >= align2 && i < align2 + len)
	207	{
	208	i = align2 + len - 1;
	209	continue;
	210	}
	211	if (i >= srcstart && i < srcend)
	212	{
	213	i = srcend - 1;
	214	continue;
	215	}
	216	if (p2[i] != c)
	217	{
	218	error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
	219	n, impl->name, align1, align2, len);
	220	ret = 1;
	221	break;
	222	}
	223	}
	224
	225	if (srcstart < align2
	226	&& memcmp (p2 + srcstart, p1 + srcstart,
	227	(srcend > align2 ? align2 : srcend) - srcstart))
	228	{
	229	error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
	230	n, impl->name, align1, align2, len);
	231	ret = 1;
	232	break;
	233	}
	234
	235	i = srcstart > align2 + len ? srcstart : align2 + len;
	236	if (srcend > align2 + len
	237	&& memcmp (p2 + i, p1 + i, srcend - i))
	238	{
	239	error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
	240	n, impl->name, align1, align2, len);
	241	ret = 1;
	242	break;
	243	}
	244	}
	245	}
	246	}
	247
	248	int
	249	test_main (void)
	250	{
	251	size_t i;
	252
	253	test_init ();
	254
	255	printf ("%23s", "");
	256	FOR_EACH_IMPL (impl, 0)
	257	printf ("\t%s", impl->name);
	258	putchar ('\n');
	259
	260	for (i = 0; i < 14; ++i)
	261	{
262	do_test (0, 32, 1 << i);
263	do_test (32, 0, 1 << i);
264	do_test (0, i, 1 << i);
265	do_test (i, 0, 1 << i);
266	}
267
268	for (i = 0; i < 32; ++i)
269	{
270	do_test (0, 32, i);
271	do_test (32, 0, i);
272	do_test (0, i, i);
273	do_test (i, 0, i);
274	}
275
276	for (i = 3; i < 32; ++i)
277	{
278	if ((i & (i - 1)) == 0)
279	continue;
280	do_test (0, 32, 16 * i);
281	do_test (32, 0, 16 * i);
282	do_test (0, i, 16 * i);
283	do_test (i, 0, 16 * i);
284	}
285
286	do_random_tests ();
287	return ret;
288	}
289
290	#include "../test-skeleton.c"