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

/* Test memset functions.
   Copyright (C) 1999-2025 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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
   <https://www.gnu.org/licenses/>.  */

#define TEST_MAIN
#ifdef TEST_BZERO
# ifdef TEST_EXPLICIT_BZERO
#  define TEST_NAME "explicit_bzero"
# else
#  define TEST_NAME "bzero"
# endif
#else
# ifndef WIDE
#  define TEST_NAME "memset"
# else
#  define TEST_NAME "wmemset"
# endif /* WIDE */
#endif /* !TEST_BZERO */
#define MIN_PAGE_SIZE 131072
#include "test-string.h"

#ifndef WIDE
# define MEMSET memset
# define CHAR char
# define UCHAR unsigned char
# define SIMPLE_MEMSET simple_memset
# define MEMCMP memcmp
# define BIG_CHAR CHAR_MAX
#else
# include <wchar.h>
# define MEMSET wmemset
# define CHAR wchar_t
# define UCHAR wchar_t
# define SIMPLE_MEMSET simple_wmemset
# define MEMCMP wmemcmp
# define BIG_CHAR WCHAR_MAX
#endif /* WIDE */

#ifdef TEST_BZERO
typedef void (*proto_t) (char *, size_t);
# ifdef TEST_EXPLICIT_BZERO
IMPL (explicit_bzero, 1)
# else
IMPL (bzero, 1)
# endif
#else
typedef CHAR *(*proto_t) (CHAR *, int, size_t);
IMPL (MEMSET, 1)
#endif /* !TEST_BZERO */

/* Naive implementation to verify results.  */
CHAR *
test_cc_inhibit_loop_to_libcall
SIMPLE_MEMSET (CHAR *s, int c, size_t n)
{
  CHAR *r = s, *end = s + n;
  while (r < end)
    *r++ = c;
  return s;
}

static void
do_one_test (impl_t *impl, CHAR *s, int c __attribute ((unused)), size_t n, int space_below, int space_above)
{
  CHAR buf[n];
  CHAR sentinel = ~c;
  if (space_below)
      s[-1] = sentinel;
  if (space_above)
      s[n] = sentinel;
  SIMPLE_MEMSET(s, ~c, n);
#ifdef TEST_BZERO
  SIMPLE_MEMSET (buf, 0, n);
  CALL (impl, s, n);
  if (memcmp (s, buf, n) != 0
      || (space_below && s[-1] != sentinel)
      || (space_above && s[n] != sentinel))
#else
  CHAR *res = CALL (impl, s, c, n);
  if (res != s
      || SIMPLE_MEMSET (buf, c, n) != buf
      || MEMCMP (s, buf, n) != 0
      || (space_below && s[-1] != sentinel)
      || (space_above && s[n] != sentinel))
#endif /* !TEST_BZERO */
    {
      error (0, 0, "Wrong result in function %s", impl->name);
      ret = 1;
      return;
    }
}

static void
do_test (size_t align, int c, size_t len)
{
  int space_below, space_above;
  align &= 4095;
  if ((align + len) * sizeof (CHAR) > page_size)
    return;

  space_below = !!align;
  space_above = !((align + len + 1) * sizeof (CHAR) > page_size);

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, (CHAR *) (buf1) + align, c, len, space_below, space_above);
}

#ifndef TEST_BZERO
static void
do_random_tests (void)
{
  size_t i, j, k, n, align, len, size;
  int c, o;
  UCHAR *p, *res;
  UCHAR *p2 = (UCHAR *) buf2;

  for (i = 0; i < 65536 / sizeof (CHAR); ++i)
    p2[i] = random () & BIG_CHAR;

  for (n = 0; n < ITERATIONS; n++)
    {
      if ((random () & 31) == 0)
	size = 65536 / sizeof (CHAR);
      else
	size = 512;
      p = (UCHAR *) (buf1 + page_size) - size;
      len = random () & (size - 1);
      align = size - len - (random () & 31);
      if (align > size)
	align = size - len;
      if ((random () & 7) == 0)
	align &= ~63;
      if ((random () & 7) == 0)
	c = 0;
      else
	c = random () & BIG_CHAR;
      o = random () & BIG_CHAR;
      if (o == c)
	o = (c + 1) & BIG_CHAR;
      j = len + align + 128;
      if (j > size)
	j = size;
      if (align >= 128)
	k = align - 128;
      else
	k = 0;
      for (i = k; i < align; ++i)
	p[i] = o;
      for (i = align + len; i < j; ++i)
	p[i] = o;

      FOR_EACH_IMPL (impl, 1)
	{
	  for (i = 0; i < len; ++i)
	    {
	      p[i + align] = p2[i];
	      if (p[i + align] == c)
		p[i + align] = o;
	    }
	  res = (UCHAR *) CALL (impl, (CHAR *) p + align, c, len);
	  if (res != p + align)
	    {
	      error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd) %p != %p",
		     n, impl->name, align, c, len, res, p + align);
	      ret = 1;
	    }
	  for (i = k; i < align; ++i)
	    if (p[i] != o)
	      {
		error (0, 0, "Iteration %zd - garbage before %s (%zd, %d, %zd)",
		       n, impl->name, align, c, len);
		ret = 1;
		break;
	      }
	  for (; i < align + len; ++i)
	    if (p[i] != c)
	      {
		error (0, 0, "Iteration %zd - not cleared correctly %s (%zd, %d, %zd)",
		       n, impl->name, align, c, len);
		ret = 1;
		break;
	      }
	  for (; i < j; ++i)
	    if (p[i] != o)
	      {
		error (0, 0, "Iteration %zd - garbage after %s (%zd, %d, %zd)",
		       n, impl->name, align, c, len);
		ret = 1;
		break;
	      }
	}
    }
}
#endif /* !TEST_BZERO */

int
test_main (void)
{
  size_t i;
  int c = 0;

  test_init ();

  printf ("%24s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

#ifndef TEST_BZERO
  for (c = -65; c <= 130; c += 65)
#endif
    {
      for (i = 0; i < 18; ++i)
	do_test (0, c, 1 << i);
      for (i = 1; i < 64; ++i)
	{
	  do_test (i, c, i);
	  do_test (4096 - i, c, i);
	  do_test (4095, c, i);
	  if (i & (i - 1))
	    do_test (0, c, i);
	}
      do_test (1, c, 14);
      do_test (3, c, 1024);
      do_test (4, c, 64);
      do_test (2, c, 25);
    }

#ifndef TEST_BZERO
  do_random_tests ();
#endif

  return ret;
}

#include <support/test-driver.c>
Commit	Line	Data
	1	/* Test memset functions.
	2	Copyright (C) 1999-2025 Free Software Foundation, Inc.
	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, see
	17	<https://www.gnu.org/licenses/>. */
	18
	19	#define TEST_MAIN
	20	#ifdef TEST_BZERO
	21	# ifdef TEST_EXPLICIT_BZERO
	22	# define TEST_NAME "explicit_bzero"
	23	# else
	24	# define TEST_NAME "bzero"
	25	# endif
	26	#else
	27	# ifndef WIDE
	28	# define TEST_NAME "memset"
	29	# else
	30	# define TEST_NAME "wmemset"
	31	# endif /* WIDE */
	32	#endif /* !TEST_BZERO */
	33	#define MIN_PAGE_SIZE 131072
	34	#include "test-string.h"
	35
	36	#ifndef WIDE
	37	# define MEMSET memset
	38	# define CHAR char
	39	# define UCHAR unsigned char
	40	# define SIMPLE_MEMSET simple_memset
	41	# define MEMCMP memcmp
	42	# define BIG_CHAR CHAR_MAX
	43	#else
	44	# include <wchar.h>
	45	# define MEMSET wmemset
	46	# define CHAR wchar_t
	47	# define UCHAR wchar_t
	48	# define SIMPLE_MEMSET simple_wmemset
	49	# define MEMCMP wmemcmp
	50	# define BIG_CHAR WCHAR_MAX
	51	#endif /* WIDE */
	52
	53	#ifdef TEST_BZERO
	54	typedef void (proto_t) (char , size_t);
	55	# ifdef TEST_EXPLICIT_BZERO
	56	IMPL (explicit_bzero, 1)
	57	# else
	58	IMPL (bzero, 1)
	59	# endif
	60	#else
	61	typedef CHAR (proto_t) (CHAR *, int, size_t);
	62	IMPL (MEMSET, 1)
	63	#endif /* !TEST_BZERO */
	64
	65	/* Naive implementation to verify results. */
	66	CHAR *
	67	test_cc_inhibit_loop_to_libcall
	68	SIMPLE_MEMSET (CHAR *s, int c, size_t n)
	69	{
	70	CHAR r = s, end = s + n;
	71	while (r < end)
	72	*r++ = c;
	73	return s;
	74	}
	75
	76	static void
	77	do_one_test (impl_t impl, CHAR s, int c __attribute ((unused)), size_t n, int space_below, int space_above)
	78	{
	79	CHAR buf[n];
	80	CHAR sentinel = ~c;
	81	if (space_below)
	82	s[-1] = sentinel;
	83	if (space_above)
	84	s[n] = sentinel;
	85	SIMPLE_MEMSET(s, ~c, n);
	86	#ifdef TEST_BZERO
	87	SIMPLE_MEMSET (buf, 0, n);
	88	CALL (impl, s, n);
	89	if (memcmp (s, buf, n) != 0
	90	\|\| (space_below && s[-1] != sentinel)
	91	\|\| (space_above && s[n] != sentinel))
	92	#else
	93	CHAR *res = CALL (impl, s, c, n);
	94	if (res != s
	95	\|\| SIMPLE_MEMSET (buf, c, n) != buf
	96	\|\| MEMCMP (s, buf, n) != 0
	97	\|\| (space_below && s[-1] != sentinel)
	98	\|\| (space_above && s[n] != sentinel))
	99	#endif /* !TEST_BZERO */
	100	{
	101	error (0, 0, "Wrong result in function %s", impl->name);
	102	ret = 1;
	103	return;
	104	}
	105	}
	106
	107	static void
	108	do_test (size_t align, int c, size_t len)
	109	{
	110	int space_below, space_above;
	111	align &= 4095;
	112	if ((align + len) * sizeof (CHAR) > page_size)
	113	return;
	114
	115	space_below = !!align;
	116	space_above = !((align + len + 1) * sizeof (CHAR) > page_size);
	117
	118	FOR_EACH_IMPL (impl, 0)
	119	do_one_test (impl, (CHAR *) (buf1) + align, c, len, space_below, space_above);
	120	}
	121
	122	#ifndef TEST_BZERO
	123	static void
	124	do_random_tests (void)
	125	{
	126	size_t i, j, k, n, align, len, size;
	127	int c, o;
	128	UCHAR p, res;
	129	UCHAR p2 = (UCHAR ) buf2;
	130
	131	for (i = 0; i < 65536 / sizeof (CHAR); ++i)
	132	p2[i] = random () & BIG_CHAR;
	133
	134	for (n = 0; n < ITERATIONS; n++)
	135	{
	136	if ((random () & 31) == 0)
	137	size = 65536 / sizeof (CHAR);
	138	else
	139	size = 512;
	140	p = (UCHAR *) (buf1 + page_size) - size;
	141	len = random () & (size - 1);
	142	align = size - len - (random () & 31);
	143	if (align > size)
	144	align = size - len;
	145	if ((random () & 7) == 0)
	146	align &= ~63;
	147	if ((random () & 7) == 0)
	148	c = 0;
	149	else
	150	c = random () & BIG_CHAR;
	151	o = random () & BIG_CHAR;
	152	if (o == c)
	153	o = (c + 1) & BIG_CHAR;
	154	j = len + align + 128;
	155	if (j > size)
	156	j = size;
	157	if (align >= 128)
	158	k = align - 128;
	159	else
	160	k = 0;
	161	for (i = k; i < align; ++i)
	162	p[i] = o;
	163	for (i = align + len; i < j; ++i)
	164	p[i] = o;
	165
	166	FOR_EACH_IMPL (impl, 1)
	167	{
	168	for (i = 0; i < len; ++i)
	169	{
	170	p[i + align] = p2[i];
	171	if (p[i + align] == c)
	172	p[i + align] = o;
	173	}
	174	res = (UCHAR ) CALL (impl, (CHAR ) p + align, c, len);
	175	if (res != p + align)
	176	{
	177	error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd) %p != %p",
	178	n, impl->name, align, c, len, res, p + align);
	179	ret = 1;
	180	}
	181	for (i = k; i < align; ++i)
	182	if (p[i] != o)
	183	{
	184	error (0, 0, "Iteration %zd - garbage before %s (%zd, %d, %zd)",
	185	n, impl->name, align, c, len);
	186	ret = 1;
	187	break;
	188	}
	189	for (; i < align + len; ++i)
	190	if (p[i] != c)
	191	{
	192	error (0, 0, "Iteration %zd - not cleared correctly %s (%zd, %d, %zd)",
	193	n, impl->name, align, c, len);
	194	ret = 1;
	195	break;
	196	}
	197	for (; i < j; ++i)
	198	if (p[i] != o)
	199	{
	200	error (0, 0, "Iteration %zd - garbage after %s (%zd, %d, %zd)",
	201	n, impl->name, align, c, len);
	202	ret = 1;
	203	break;
	204	}
	205	}
	206	}
	207	}
	208	#endif /* !TEST_BZERO */
	209
	210	int
	211	test_main (void)
	212	{
	213	size_t i;
	214	int c = 0;
	215
	216	test_init ();
	217
	218	printf ("%24s", "");
	219	FOR_EACH_IMPL (impl, 0)
	220	printf ("\t%s", impl->name);
	221	putchar ('\n');
	222
	223	#ifndef TEST_BZERO
	224	for (c = -65; c <= 130; c += 65)
	225	#endif
	226	{
	227	for (i = 0; i < 18; ++i)
	228	do_test (0, c, 1 << i);
	229	for (i = 1; i < 64; ++i)
	230	{
	231	do_test (i, c, i);
	232	do_test (4096 - i, c, i);
	233	do_test (4095, c, i);
	234	if (i & (i - 1))
	235	do_test (0, c, i);
	236	}
	237	do_test (1, c, 14);
	238	do_test (3, c, 1024);
	239	do_test (4, c, 64);
	240	do_test (2, c, 25);
	241	}
	242
	243	#ifndef TEST_BZERO
	244	do_random_tests ();
	245	#endif
	246
	247	return ret;
	248	}
	249
	250	#include <support/test-driver.c>