mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-03 04:01:43 +08:00
363 lines
8.1 KiB
C
363 lines
8.1 KiB
C
/* Test and measure memmove functions.
|
|
Copyright (C) 1999-2021 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
|
|
<https://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 (size_t offset)
|
|
{
|
|
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;
|
|
if (bytes_move + offset * sizeof (uint32_t) > size)
|
|
{
|
|
munmap ((void *) large_buf, size);
|
|
return;
|
|
}
|
|
size_t arr_size = bytes_move / sizeof (uint32_t);
|
|
size_t i;
|
|
size_t repeats;
|
|
uint32_t * src = large_buf;
|
|
uint32_t * dst = &large_buf[offset];
|
|
for (repeats = 0; repeats < 2; ++repeats)
|
|
{
|
|
FOR_EACH_IMPL (impl, 0)
|
|
{
|
|
for (i = 0; i < arr_size; i++)
|
|
src[i] = (uint32_t) i;
|
|
|
|
|
|
#ifdef TEST_BCOPY
|
|
CALL (impl, (char *) src, (char *) dst, bytes_move);
|
|
#else
|
|
CALL (impl, (char *) dst, (char *) src, 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;
|
|
munmap ((void *) large_buf, size);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
src = dst;
|
|
dst = large_buf;
|
|
}
|
|
|
|
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 (33);
|
|
do_test2 (0x200000);
|
|
do_test2 (0x4000000 - 1);
|
|
do_test2 (0x4000000);
|
|
return ret;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|