mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
ff65c87443
May be tricky for otimized implementations to handle strings around page boundary once, for instance, it is performed unaligned loads or when maxlen is used as a hint for vectorized loops. The test cases should unveil regression bugs on these cases. To some extend do_random_tests in string/test-strnlen tests strings placed at page end but it does not cover all cases. So this change adds tests which consists of placing strings of varying sizes ending at the page boundary. It also combines with different values of maxlen. Tested on ppc64le and x86_64. * string/test-strnlen.c (do_page_tests): New function to check length of strings ending at the page boundary. (test_main): Added call to the do_page_tests function.
249 lines
6.4 KiB
C
249 lines
6.4 KiB
C
/* Test strlen functions.
|
|
Copyright (C) 1999-2017 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/>. */
|
|
|
|
#define TEST_MAIN
|
|
#ifndef WIDE
|
|
# define TEST_NAME "strnlen"
|
|
#else
|
|
# define TEST_NAME "wcsnlen"
|
|
#endif /* !WIDE */
|
|
#include "test-string.h"
|
|
|
|
#ifndef WIDE
|
|
# define STRNLEN strnlen
|
|
# define CHAR char
|
|
# define BIG_CHAR CHAR_MAX
|
|
# define MIDDLE_CHAR 127
|
|
# define SIMPLE_STRNLEN simple_strnlen
|
|
#else
|
|
# include <wchar.h>
|
|
# define STRNLEN wcsnlen
|
|
# define CHAR wchar_t
|
|
# define BIG_CHAR WCHAR_MAX
|
|
# define MIDDLE_CHAR 1121
|
|
# define SIMPLE_STRNLEN simple_wcsnlen
|
|
#endif /* !WIDE */
|
|
|
|
typedef size_t (*proto_t) (const CHAR *, size_t);
|
|
size_t SIMPLE_STRNLEN (const CHAR *, size_t);
|
|
|
|
IMPL (SIMPLE_STRNLEN, 0)
|
|
IMPL (STRNLEN, 1)
|
|
|
|
size_t
|
|
SIMPLE_STRNLEN (const CHAR *s, size_t maxlen)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < maxlen && s[i]; ++i);
|
|
return i;
|
|
}
|
|
|
|
static void
|
|
do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
|
|
{
|
|
size_t len = CALL (impl, s, maxlen);
|
|
if (len != exp_len)
|
|
{
|
|
error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
|
|
len, exp_len);
|
|
ret = 1;
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_test (size_t align, size_t len, size_t maxlen, int max_char)
|
|
{
|
|
size_t i;
|
|
|
|
align &= 63;
|
|
if ((align + len) * sizeof (CHAR) >= page_size)
|
|
return;
|
|
|
|
CHAR *buf = (CHAR *) (buf1);
|
|
|
|
for (i = 0; i < len; ++i)
|
|
buf[align + i] = 1 + 11111 * i % max_char;
|
|
buf[align + len] = 0;
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen));
|
|
}
|
|
|
|
static void
|
|
do_random_tests (void)
|
|
{
|
|
size_t i, j, n, align, len;
|
|
CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
|
|
|
|
for (n = 0; n < ITERATIONS; n++)
|
|
{
|
|
align = random () & 15;
|
|
len = random () & 511;
|
|
if (len + align > 510)
|
|
len = 511 - align - (random () & 7);
|
|
j = len + align + 64;
|
|
if (j > 512)
|
|
j = 512;
|
|
|
|
for (i = 0; i < j; i++)
|
|
{
|
|
if (i == len + align)
|
|
p[i] = 0;
|
|
else
|
|
{
|
|
p[i] = random () & 255;
|
|
if (i >= align && i < len + align && !p[i])
|
|
p[i] = (random () & 127) + 1;
|
|
}
|
|
}
|
|
|
|
FOR_EACH_IMPL (impl, 1)
|
|
{
|
|
if (len > 0
|
|
&& CALL (impl, (CHAR *) (p + align), len - 1) != len - 1)
|
|
{
|
|
error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p",
|
|
n, impl->name, align,
|
|
CALL (impl, (CHAR *) (p + align), len - 1), len - 1, p);
|
|
ret = 1;
|
|
}
|
|
if (CALL (impl, (CHAR *) (p + align), len) != len)
|
|
{
|
|
error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p",
|
|
n, impl->name, align,
|
|
CALL (impl, (CHAR *) (p + align), len), len, p);
|
|
ret = 1;
|
|
}
|
|
if (CALL (impl, (CHAR *) (p + align), len + 1) != len)
|
|
{
|
|
error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p",
|
|
n, impl->name, align,
|
|
CALL (impl, (CHAR *) (p + align), len + 1), len, p);
|
|
ret = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Tests meant to unveil fail on implementation that does not access bytes
|
|
around the page boundary accordingly. */
|
|
static void
|
|
do_page_tests (void)
|
|
{
|
|
size_t i, exp_len, start_offset, offset;
|
|
/* Calculate the null character offset. */
|
|
size_t last_offset = (page_size / sizeof (CHAR)) - 1;
|
|
|
|
CHAR *s = (CHAR *) buf2;
|
|
memset (s, 65, (last_offset - 1));
|
|
s[last_offset] = 0;
|
|
|
|
/* Place short strings ending at page boundary. */
|
|
offset = last_offset;
|
|
for (i = 0; i < 128; i++)
|
|
{
|
|
/* Decrease offset to stress several sizes and alignments. */
|
|
offset--;
|
|
exp_len = last_offset - offset;
|
|
FOR_EACH_IMPL (impl, 0)
|
|
{
|
|
/* Varies maxlen value to cover the cases where it is:
|
|
- larger than length;
|
|
- slightly greater than length;
|
|
- equal to length;
|
|
- slightly less than length. */
|
|
do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len);
|
|
do_one_test (impl, (CHAR *) (s + offset), exp_len + 1, exp_len);
|
|
do_one_test (impl, (CHAR *) (s + offset), exp_len, exp_len);
|
|
if (exp_len > 0)
|
|
do_one_test (impl, (CHAR *) (s + offset), exp_len - 1, exp_len - 1);
|
|
}
|
|
}
|
|
|
|
/* Place long strings ending at page boundary. */
|
|
start_offset = (last_offset + 1) / 2;
|
|
for (i = 0; i < 64; ++i)
|
|
{
|
|
/* Increase offset to stress several alignments. */
|
|
offset = start_offset + i;
|
|
if (offset >= (last_offset + 1))
|
|
break;
|
|
exp_len = last_offset - offset;
|
|
FOR_EACH_IMPL (impl, 0)
|
|
{
|
|
/* Checks only for maxlen much larger than length because smaller
|
|
values are already covered in do_random_tests function. */
|
|
do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len);
|
|
}
|
|
}
|
|
}
|
|
|
|
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 < 8; ++i)
|
|
{
|
|
do_test (0, i, i - 1, MIDDLE_CHAR);
|
|
do_test (0, i, i, MIDDLE_CHAR);
|
|
do_test (0, i, i + 1, MIDDLE_CHAR);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (i, i, i - 1, MIDDLE_CHAR);
|
|
do_test (i, i, i, MIDDLE_CHAR);
|
|
do_test (i, i, i + 1, MIDDLE_CHAR);
|
|
}
|
|
|
|
for (i = 2; i <= 10; ++i)
|
|
{
|
|
do_test (0, 1 << i, 5000, MIDDLE_CHAR);
|
|
do_test (1, 1 << i, 5000, MIDDLE_CHAR);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
do_test (0, i, 5000, BIG_CHAR);
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
do_test (i, i, 5000, BIG_CHAR);
|
|
|
|
for (i = 2; i <= 10; ++i)
|
|
{
|
|
do_test (0, 1 << i, 5000, BIG_CHAR);
|
|
do_test (1, 1 << i, 5000, BIG_CHAR);
|
|
}
|
|
|
|
do_random_tests ();
|
|
do_page_tests ();
|
|
return ret;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|