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glibc/string/test-memcpy.c
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/* Test and measure memcpy functions. | |
Copyright (C) 1999, 2002, 2003, 2005 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 MEMCPY_RESULT | |
# define MEMCPY_RESULT(dst, len) dst | |
# define MIN_PAGE_SIZE 131072 | |
# define TEST_MAIN | |
# include "test-string.h" | |
char *simple_memcpy (char *, const char *, size_t); | |
char *builtin_memcpy (char *, const char *, size_t); | |
IMPL (simple_memcpy, 0) | |
IMPL (builtin_memcpy, 0) | |
IMPL (memcpy, 1) | |
char * | |
simple_memcpy (char *dst, const char *src, size_t n) | |
{ | |
char *ret = dst; | |
while (n--) | |
*dst++ = *src++; | |
return ret; | |
} | |
char * | |
builtin_memcpy (char *dst, const char *src, size_t n) | |
{ | |
return __builtin_memcpy (dst, src, n); | |
} | |
#endif | |
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) | |
{ | |
if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len)) | |
{ | |
error (0, 0, "Wrong result in function %s %p %p", impl->name, | |
CALL (impl, dst, src, len), MEMCPY_RESULT (dst, len)); | |
ret = 1; | |
return; | |
} | |
if (memcmp (dst, src, len) != 0) | |
{ | |
error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"", | |
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, len); | |
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 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; | |
if (HP_TIMING_AVAIL) | |
printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2); | |
FOR_EACH_IMPL (impl, 0) | |
do_one_test (impl, s2, s1, len); | |
if (HP_TIMING_AVAIL) | |
putchar ('\n'); | |
} | |
static void | |
do_random_tests (void) | |
{ | |
size_t i, j, n, align1, align2, len, size1, size2, size; | |
int c; | |
unsigned char *p1, *p2; | |
unsigned char *res; | |
for (n = 0; n < ITERATIONS; n++) | |
{ | |
if (n == 0) | |
{ | |
len = getpagesize (); | |
size = len + 512; | |
size1 = size; | |
size2 = size; | |
align1 = 512; | |
align2 = 512; | |
} | |
else | |
{ | |
if ((random () & 255) == 0) | |
size = 65536; | |
else | |
size = 768; | |
if (size > page_size) | |
size = page_size; | |
size1 = size; | |
size2 = size; | |
i = random (); | |
if (i & 3) | |
size -= 256; | |
if (i & 1) | |
size1 -= 256; | |
if (i & 2) | |
size2 -= 256; | |
if (i & 4) | |
{ | |
len = random () % size; | |
align1 = size1 - len - (random () & 31); | |
align2 = size2 - len - (random () & 31); | |
if (align1 > size1) | |
align1 = 0; | |
if (align2 > size2) | |
align2 = 0; | |
} | |
else | |
{ | |
align1 = random () & 63; | |
align2 = random () & 63; | |
len = random () % size; | |
if (align1 + len > size1) | |
align1 = size1 - len; | |
if (align2 + len > size2) | |
align2 = size2 - len; | |
} | |
} | |
p1 = buf1 + page_size - size1; | |
p2 = buf2 + page_size - size2; | |
c = random () & 255; | |
j = align1 + len + 256; | |
if (j > size1) | |
j = size1; | |
for (i = 0; i < j; ++i) | |
p1[i] = random () & 255; | |
FOR_EACH_IMPL (impl, 1) | |
{ | |
j = align2 + len + 256; | |
if (j > size2) | |
j = size2; | |
memset (p2, c, j); | |
res = (unsigned char *) CALL (impl, | |
(char *) (p2 + align2), | |
(char *) (p1 + align1), len); | |
if (res != MEMCPY_RESULT (p2 + align2, len)) | |
{ | |
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p", | |
n, impl->name, align1, align2, len, res, | |
MEMCPY_RESULT (p2 + align2, len)); | |
ret = 1; | |
} | |
for (i = 0; i < align2; ++i) | |
{ | |
if (p2[i] != c) | |
{ | |
error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)", | |
n, impl->name, align1, align2, len); | |
ret = 1; | |
break; | |
} | |
} | |
for (i = align2 + len; i < j; ++i) | |
{ | |
if (p2[i] != c) | |
{ | |
error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)", | |
n, impl->name, align1, align2, len); | |
ret = 1; | |
break; | |
} | |
} | |
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; | |
} | |
} | |
} | |
} | |
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 < 18; ++i) | |
{ | |
do_test (0, 0, 1 << i); | |
do_test (i, 0, 1 << i); | |
do_test (0, i, 1 << i); | |
do_test (i, i, 1 << i); | |
} | |
for (i = 0; i < 32; ++i) | |
{ | |
do_test (0, 0, i); | |
do_test (i, 0, i); | |
do_test (0, i, i); | |
do_test (i, i, i); | |
} | |
for (i = 3; i < 32; ++i) | |
{ | |
if ((i & (i - 1)) == 0) | |
continue; | |
do_test (0, 0, 16 * i); | |
do_test (i, 0, 16 * i); | |
do_test (0, i, 16 * i); | |
do_test (i, i, 16 * i); | |
} | |
do_test (0, 0, getpagesize ()); | |
do_random_tests (); | |
return ret; | |
} | |
#include "../test-skeleton.c" |