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/* Test and measure memchr 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/>. */
#include <assert.h>
#include <support/xunistd.h>
#define TEST_MAIN
#define TEST_NAME "rawmemchr"
#include "test-string.h"
typedef char *(*proto_t) (const char *, int);
char *simple_rawmemchr (const char *, int);
IMPL (simple_rawmemchr, 0)
IMPL (rawmemchr, 1)
char *
simple_rawmemchr (const char *s, int c)
{
while (1)
if (*s++ == (char) c)
return (char *) s - 1;
return NULL;
}
static void
do_one_test (impl_t *impl, const char *s, int c, char *exp_res)
{
char *res = CALL (impl, s, c);
if (res != exp_res)
{
error (0, 0, "Wrong result in function %s %p %p", impl->name,
res, exp_res);
ret = 1;
return;
}
}
static void
do_test_bz29234 (void)
{
size_t i, j;
char *ptr_start;
char *buf = xmmap (0, 8192, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1);
memset (buf, -1, 8192);
ptr_start = buf + 4096 - 8;
/* Out of range matches before the start of a page. */
memset (ptr_start - 8, 0x1, 8);
for (j = 0; j < 8; ++j)
{
for (i = 0; i < 128; ++i)
{
ptr_start[i + j] = 0x1;
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (char *) (ptr_start + j), 0x1,
ptr_start + i + j);
ptr_start[i + j] = 0xff;
}
}
xmunmap (buf, 8192);
}
static void
do_test (size_t align, size_t pos, size_t len, int seek_char)
{
size_t i;
char *result;
align &= getpagesize () - 1;
if (align + len >= page_size)
return;
for (i = 0; i < len; ++i)
{
buf1[align + i] = 1 + 23 * i % 127;
if (buf1[align + i] == seek_char)
buf1[align + i] = seek_char + 1;
}
buf1[align + len] = 0;
assert (pos < len);
buf1[align + pos] = seek_char;
buf1[align + len] = -seek_char;
result = (char *) (buf1 + align + pos);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (char *) (buf1 + align), seek_char, result);
}
static void
do_random_tests (void)
{
size_t i, j, n, align, pos, len;
int seek_char;
char *result;
unsigned char *p = buf1 + page_size - 512;
for (n = 0; n < ITERATIONS; n++)
{
align = random () & 15;
pos = random () & 511;
if (pos + align >= 512)
pos = 511 - align - (random () & 7);
len = random () & 511;
if (len + align >= 512)
len = 512 - align - (random () & 7);
if (pos >= len)
continue;
seek_char = random () & 255;
j = len + align + 64;
if (j > 512)
j = 512;
for (i = 0; i < j; i++)
{
if (i == pos + align)
p[i] = seek_char;
else
{
p[i] = random () & 255;
if (i < pos + align && p[i] == seek_char)
p[i] = seek_char + 13;
}
}
if (align)
{
p[align - 1] = seek_char;
if (align > 4)
p[align - 4] = seek_char;
}
assert (pos < len);
size_t r = random ();
if ((r & 31) == 0)
len = ~(uintptr_t) (p + align) - ((r >> 5) & 31);
result = (char *) (p + pos + align);
FOR_EACH_IMPL (impl, 1)
if (CALL (impl, (char *) (p + align), seek_char) != result)
{
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
n, impl->name, align, seek_char, len, pos,
CALL (impl, (char *) (p + align), seek_char),
result, p);
ret = 1;
}
if (align)
{
p[align - 1] = seek_char;
if (align > 4)
p[align - 4] = seek_char;
}
}
}
int
test_main (void)
{
size_t i;
test_init ();
printf ("%20s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 7; ++i)
{
do_test (0, 16 << i, 2048, 23);
do_test (i, 64, 256, 23);
do_test (0, 16 << i, 2048, 0);
do_test (i, 64, 256, 0);
do_test (getpagesize () - i, 64, 256, 23);
do_test (getpagesize () - i, 64, 256, 0);
}
for (i = 1; i < 32; ++i)
{
do_test (0, i, i + 1, 23);
do_test (0, i, i + 1, 0);
do_test (getpagesize () - 7, i, i + 1, 23);
do_test (getpagesize () - i / 2, i, i + 1, 23);
do_test (getpagesize () - i, i, i + 1, 23);
}
do_random_tests ();
do_test_bz29234 ();
return ret;
}
#include <support/test-driver.c>
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