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/* Test and measure memcpy functions.
Copyright (C) 1999-2023 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/>. */
/* test-memcpy-support.h contains all test functions. */
#include "test-memcpy-support.h"
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, j;
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);
}
for (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 ();
do_test1 (0, 0, 0x100000);
do_test1 (0, 0, 0x2000000);
for (i = 4096; i < 32768; i += 4096)
{
for (j = 1; j <= 1024; j <<= 1)
{
do_test1 (0, j, i);
do_test1 (4095, j, i);
do_test1 (4096 - j, 0, i);
do_test1 (0, j - 1, i);
do_test1 (4095, j - 1, i);
do_test1 (4096 - j - 1, 0, i);
do_test1 (0, j + 1, i);
do_test1 (4095, j + 1, i);
do_test1 (4096 - j, 1, i);
}
}
for (i = 0x300000; i < 0x2000000; i += 0x235689)
{
for (j = 64; j <= 1024; j <<= 1)
{
do_test1 (0, j, i);
do_test1 (4095, j, i);
do_test1 (4096 - j, 0, i);
do_test1 (0, j - 1, i);
do_test1 (4095, j - 1, i);
do_test1 (4096 - j - 1, 0, i);
do_test1 (0, j + 1, i);
do_test1 (4095, j + 1, i);
do_test1 (4096 - j, 1, i);
}
}
return ret;
}
#include <support/test-driver.c>
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