/* Test and measure memcpy functions.
Copyright (C) 1999-2018 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/>. */
#ifndef MEMCPY_RESULT
# define MEMCPY_RESULT(dst, len) dst
# define MIN_PAGE_SIZE 131072
# define TEST_MAIN
# define TEST_NAME "memcpy"
# 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)
{
size_t i;
/* Must clear the destination buffer set by the previous run. */
for (i = 0; i < len; i++)
dst[i] = 0;
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 %p \"%.*s\" src %p \"%.*s\" len %zu",
impl->name, dst, (int) len, dst, src, (int) len, src, len);
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, s1, len);
}
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;
}
}
}
}
static void
do_test1 (void)
{
size_t size = 0x100000;
void *large_buf;
large_buf = mmap (NULL, size * 2 + page_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (large_buf == MAP_FAILED)
{
puts ("Failed to allocat large_buf, skipping do_test1");
return;
}
if (mprotect (large_buf + size, page_size, PROT_NONE))
error (EXIT_FAILURE, errno, "mprotect failed");
size_t arrary_size = size / sizeof (uint32_t);
uint32_t *dest = large_buf;
uint32_t *src = large_buf + size + page_size;
size_t i;
for (i = 0; i < arrary_size; i++)
src[i] = (uint32_t) i;
FOR_EACH_IMPL (impl, 0)
{
memset (dest, -1, size);
CALL (impl, (char *) dest, (char *) src, size);
for (i = 0; i < arrary_size; i++)
if (dest[i] != src[i])
{
error (0, 0,
"Wrong result in function %s dst \"%p\" src \"%p\" offset \"%zd\"",
impl->name, dest, src, i);
ret = 1;
break;
}
}
munmap ((void *) dest, size);
munmap ((void *) src, 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 < 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 ();
do_test1 ();
return ret;
}
#include <support/test-driver.c>