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

/* Test and measure memmove functions.
   Copyright (C) 1999-2019 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"
#include <support/test-driver.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;
	    }
	}
    }
}

static void
do_test2 (void)
{
  size_t size = 0x20000000;
  uint32_t * large_buf;

  large_buf = mmap ((void*) 0x70000000, size, PROT_READ | PROT_WRITE,
		    MAP_PRIVATE | MAP_ANON, -1, 0);

  if (large_buf == MAP_FAILED)
    error (EXIT_UNSUPPORTED, errno, "Large mmap failed");

  if ((uintptr_t) large_buf > 0x80000000 - 128
      || 0x80000000 - (uintptr_t) large_buf > 0x20000000)
    {
      error (0, 0, "Large mmap allocated improperly");
      ret = EXIT_UNSUPPORTED;
      munmap ((void *) large_buf, size);
      return;
    }

  size_t bytes_move = 0x80000000 - (uintptr_t) large_buf;
  size_t arr_size = bytes_move / sizeof (uint32_t);
  size_t i;

  FOR_EACH_IMPL (impl, 0)
    {
      for (i = 0; i < arr_size; i++)
        large_buf[i] = (uint32_t) i;

      uint32_t * dst = &large_buf[33];

#ifdef TEST_BCOPY
      CALL (impl, (char *) large_buf, (char *) dst, bytes_move);
#else
      CALL (impl, (char *) dst, (char *) large_buf, bytes_move);
#endif

      for (i = 0; i < arr_size; i++)
	{
	  if (dst[i] != (uint32_t) i)
	    {
	      error (0, 0,
		     "Wrong result in function %s dst \"%p\" src \"%p\" offset \"%zd\"",
		     impl->name, dst, large_buf, i);
	      ret = 1;
	      break;
	    }
	}
    }

  munmap ((void *) large_buf, size);
}

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 ();

  do_test2 ();

  return ret;
}

#include <support/test-driver.c>
Commit	Line	Data
58ef9ef7	1	/* Test and measure memmove functions.
04277e02	2	Copyright (C) 1999-2019 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	26	#include "test-string.h"
cd66c0e5	27	#include <support/test-driver.h>
58ef9ef7	28
58ef9ef7 RM	29	char simple_memmove (char , const char *, size_t);
58ef9ef7 RM	30
9a387d1f L	31	#ifdef TEST_BCOPY
	32	typedef void (proto_t) (const char , char *, size_t);
	33	void simple_bcopy (const char , char , size_t);
	34
	35	IMPL (simple_bcopy, 0)
	36	IMPL (bcopy, 1)
	37
	38	void
	39	simple_bcopy (const char src, char dst, size_t n)
	40	{
	41	simple_memmove (dst, src, n);
	42	}
	43	#else
	44	typedef char (proto_t) (char , const char , size_t);
	45
58ef9ef7 RM	46	IMPL (simple_memmove, 0)
58ef9ef7 RM	47	IMPL (memmove, 1)
9a387d1f	48	#endif
58ef9ef7 RM	49
58ef9ef7 RM	50	char *
85c2e611	51	inhibit_loop_to_libcall
58ef9ef7 RM	52	simple_memmove (char dst, const char src, size_t n)
	53	{
	54	char *ret = dst;
	55	if (src < dst)
	56	{
	57	dst += n;
	58	src += n;
	59	while (n--)
	60	--dst = --src;
	61	}
	62	else
	63	while (n--)
	64	dst++ = src++;
	65	return ret;
	66	}
	67
	68	static void
	69	do_one_test (impl_t impl, char dst, char src, const char orig_src,
	70	size_t len)
	71	{
447720b0	72	/* This also clears the destination buffer set by the previous run. */
9a387d1f L	73	memcpy (src, orig_src, len);
	74	#ifdef TEST_BCOPY
	75	CALL (impl, src, dst, len);
	76	#else
58ef9ef7 RM	77	char *res;
58ef9ef7 RM	78
58ef9ef7 RM	79	res = CALL (impl, dst, src, len);
	80	if (res != dst)
	81	{
	82	error (0, 0, "Wrong result in function %s %p %p", impl->name,
	83	res, dst);
	84	ret = 1;
	85	return;
	86	}
9a387d1f	87	#endif
58ef9ef7 RM	88
	89	if (memcmp (dst, orig_src, len) != 0)
	90	{
	91	error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
	92	impl->name, dst, src);
	93	ret = 1;
	94	return;
	95	}
58ef9ef7 RM	96	}
	97
	98	static void
	99	do_test (size_t align1, size_t align2, size_t len)
	100	{
	101	size_t i, j;
	102	char s1, s2;
	103
	104	align1 &= 63;
	105	if (align1 + len >= page_size)
	106	return;
	107
	108	align2 &= 63;
	109	if (align2 + len >= page_size)
	110	return;
	111
0317eaec RM	112	s1 = (char *) (buf1 + align1);
0317eaec RM	113	s2 = (char *) (buf2 + align2);
58ef9ef7 RM	114
	115	for (i = 0, j = 1; i < len; i++, j += 23)
	116	s1[i] = j;
	117
58ef9ef7	118	FOR_EACH_IMPL (impl, 0)
0317eaec	119	do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
58ef9ef7 RM	120	}
	121
	122	static void
	123	do_random_tests (void)
	124	{
	125	size_t i, n, align1, align2, len, size;
	126	size_t srcstart, srcend, dststart, dstend;
	127	int c;
	128	unsigned char p1, p2;
9a387d1f	129	#ifndef TEST_BCOPY
58ef9ef7	130	unsigned char *res;
9a387d1f	131	#endif
58ef9ef7 RM	132
	133	for (n = 0; n < ITERATIONS; n++)
	134	{
	135	if ((random () & 255) == 0)
	136	size = 65536;
	137	else
	138	size = 512;
	139	if (size > page_size)
	140	size = page_size;
	141	if ((random () & 3) == 0)
	142	{
	143	len = random () & (size - 1);
	144	align1 = size - len - (random () & 31);
	145	align2 = size - len - (random () & 31);
	146	if (align1 > size)
	147	align1 = 0;
	148	if (align2 > size)
	149	align2 = 0;
	150	}
	151	else
	152	{
	153	align1 = random () & (size / 2 - 1);
	154	align2 = random () & (size / 2 - 1);
	155	len = random () & (size - 1);
	156	if (align1 + len > size)
	157	align1 = size - len;
	158	if (align2 + len > size)
	159	align2 = size - len;
	160	}
	161
	162	p1 = buf1 + page_size - size;
	163	p2 = buf2 + page_size - size;
	164	c = random () & 255;
	165	srcend = align1 + len + 256;
	166	if (srcend > size)
	167	srcend = size;
	168	if (align1 > 256)
	169	srcstart = align1 - 256;
	170	else
	171	srcstart = 0;
	172	for (i = srcstart; i < srcend; ++i)
	173	p1[i] = random () & 255;
	174	dstend = align2 + len + 256;
	175	if (dstend > size)
	176	dstend = size;
	177	if (align2 > 256)
	178	dststart = align2 - 256;
	179	else
	180	dststart = 0;
	181
	182	FOR_EACH_IMPL (impl, 1)
	183	{
	184	memset (p2 + dststart, c, dstend - dststart);
	185	memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
9a387d1f L	186	#ifdef TEST_BCOPY
	187	CALL (impl, (char ) (p2 + align1), (char ) (p2 + align2), len);
	188	#else
0317eaec RM	189	res = (unsigned char *) CALL (impl,
	190	(char *) (p2 + align2),
	191	(char *) (p2 + align1), len);
58ef9ef7 RM	192	if (res != p2 + align2)
	193	{
	194	error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
	195	n, impl->name, align1, align2, len, res, p2 + align2);
	196	ret = 1;
	197	}
9a387d1f	198	#endif
58ef9ef7 RM	199	if (memcmp (p1 + align1, p2 + align2, len))
	200	{
	201	error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
	202	n, impl->name, align1, align2, len);
	203	ret = 1;
	204	}
	205	for (i = dststart; i < dstend; ++i)
	206	{
	207	if (i >= align2 && i < align2 + len)
	208	{
	209	i = align2 + len - 1;
	210	continue;
	211	}
	212	if (i >= srcstart && i < srcend)
	213	{
	214	i = srcend - 1;
	215	continue;
	216	}
	217	if (p2[i] != c)
	218	{
	219	error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
	220	n, impl->name, align1, align2, len);
	221	ret = 1;
	222	break;
	223	}
	224	}
	225
	226	if (srcstart < align2
	227	&& memcmp (p2 + srcstart, p1 + srcstart,
	228	(srcend > align2 ? align2 : srcend) - srcstart))
	229	{
	230	error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
	231	n, impl->name, align1, align2, len);
	232	ret = 1;
	233	break;
	234	}
	235
	236	i = srcstart > align2 + len ? srcstart : align2 + len;
	237	if (srcend > align2 + len
	238	&& memcmp (p2 + i, p1 + i, srcend - i))
	239	{
	240	error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
	241	n, impl->name, align1, align2, len);
	242	ret = 1;
	243	break;
	244	}
	245	}
	246	}
	247	}
	248
cd66c0e5 AS	249	static void
	250	do_test2 (void)
	251	{
	252	size_t size = 0x20000000;
	253	uint32_t * large_buf;
	254
	255	large_buf = mmap ((void*) 0x70000000, size, PROT_READ \| PROT_WRITE,
	256	MAP_PRIVATE \| MAP_ANON, -1, 0);
	257
	258	if (large_buf == MAP_FAILED)
	259	error (EXIT_UNSUPPORTED, errno, "Large mmap failed");
	260
	261	if ((uintptr_t) large_buf > 0x80000000 - 128
	262	\|\| 0x80000000 - (uintptr_t) large_buf > 0x20000000)
	263	{
	264	error (0, 0, "Large mmap allocated improperly");
	265	ret = EXIT_UNSUPPORTED;
	266	munmap ((void *) large_buf, size);
	267	return;
	268	}
	269
	270	size_t bytes_move = 0x80000000 - (uintptr_t) large_buf;
	271	size_t arr_size = bytes_move / sizeof (uint32_t);
	272	size_t i;
	273
	274	FOR_EACH_IMPL (impl, 0)
	275	{
	276	for (i = 0; i < arr_size; i++)
	277	large_buf[i] = (uint32_t) i;
	278
	279	uint32_t * dst = &large_buf[33];
	280
	281	#ifdef TEST_BCOPY
	282	CALL (impl, (char ) large_buf, (char ) dst, bytes_move);
	283	#else
	284	CALL (impl, (char ) dst, (char ) large_buf, bytes_move);
	285	#endif
	286
	287	for (i = 0; i < arr_size; i++)
	288	{
	289	if (dst[i] != (uint32_t) i)
	290	{
	291	error (0, 0,
	292	"Wrong result in function %s dst \"%p\" src \"%p\" offset \"%zd\"",
	293	impl->name, dst, large_buf, i);
	294	ret = 1;
	295	break;
	296	}
	297	}
	298	}
	299
	300	munmap ((void *) large_buf, size);
	301	}
	302
58ef9ef7 RM	303	int
	304	test_main (void)
	305	{
	306	size_t i;
	307
	308	test_init ();
	309
	310	printf ("%23s", "");
	311	FOR_EACH_IMPL (impl, 0)
	312	printf ("\t%s", impl->name);
	313	putchar ('\n');
	314
	315	for (i = 0; i < 14; ++i)
	316	{
	317	do_test (0, 32, 1 << i);
	318	do_test (32, 0, 1 << i);
	319	do_test (0, i, 1 << i);
	320	do_test (i, 0, 1 << i);
	321	}
	322
	323	for (i = 0; i < 32; ++i)
	324	{
	325	do_test (0, 32, i);
	326	do_test (32, 0, i);
	327	do_test (0, i, i);
	328	do_test (i, 0, i);
	329	}
	330
	331	for (i = 3; i < 32; ++i)
	332	{
	333	if ((i & (i - 1)) == 0)
	334	continue;
	335	do_test (0, 32, 16 * i);
	336	do_test (32, 0, 16 * i);
	337	do_test (0, i, 16 * i);
	338	do_test (i, 0, 16 * i);
	339	}
	340
	341	do_random_tests ();
cd66c0e5 AS	342
	343	do_test2 ();
	344
58ef9ef7 RM	345	return ret;
	346	}
	347
fb82116f	348	#include <support/test-driver.c>