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/* Test and measure memcpy functions.
Copyright (C) 2023 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/>. */
#include <string.h>
#include <support/check.h>
#include <memswap.h>
#define TEST_MAIN
#define BUF1PAGES 3
#include "test-string.h"
static unsigned char *ref1;
static unsigned char *ref2;
static void
do_one_test (unsigned char *p1, unsigned char *ref1, unsigned char *p2,
unsigned char *ref2, size_t len)
{
__memswap (p1, p2, len);
TEST_COMPARE_BLOB (p1, len, ref2, len);
TEST_COMPARE_BLOB (p2, len, ref1, len);
}
static inline void
do_test (size_t align1, size_t align2, size_t len)
{
align1 &= page_size;
if (align1 + len >= page_size)
return;
align2 &= page_size;
if (align2 + len >= page_size)
return;
unsigned char *p1 = buf1 + align1;
unsigned char *p2 = buf2 + align2;
for (size_t repeats = 0; repeats < 2; ++repeats)
{
size_t i, j;
for (i = 0, j = 1; i < len; i++, j += 23)
{
ref1[i] = p1[i] = j;
ref2[i] = p2[i] = UCHAR_MAX - j;
}
do_one_test (p1, ref1, p2, ref2, len);
}
}
static void
do_random_tests (void)
{
for (size_t n = 0; n < ITERATIONS; n++)
{
size_t len, size, size1, size2, align1, align2;
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;
size_t 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;
}
}
unsigned char *p1 = buf1 + page_size - size1;
unsigned char *p2 = buf2 + page_size - size2;
size_t j = align1 + len + 256;
if (j > size1)
j = size1;
for (size_t i = 0; i < j; ++i)
ref1[i] = p1[i] = random () & 255;
j = align2 + len + 256;
if (j > size2)
j = size2;
for (size_t i = 0; i < j; ++i)
ref2[i] = p2[i] = random () & 255;
do_one_test (p1 + align1, ref1 + align1, p2 + align2, ref2 + align2, len);
}
}
static int
test_main (void)
{
test_init ();
/* Use the start of buf1 for reference buffers. */
ref1 = buf1;
ref2 = buf1 + page_size;
buf1 = ref2 + page_size;
printf ("%23s", "");
printf ("\t__memswap\n");
for (size_t 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 (size_t 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 (size_t 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);
}
for (size_t i = 19; i <= 25; ++i)
{
do_test (255, 0, 1 << i);
do_test (0, 4000, 1 << i);
do_test (0, 255, i);
do_test (0, 4000, i);
}
do_test (0, 0, getpagesize ());
do_random_tests ();
return 0;
}
#include <support/test-driver.c>
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