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glibc/string/test-strcasecmp.c
Noah Goldstein 1edbcc82b5 string: Expand page cross tests in test-strcasecmp.c 
Add more robust tests that cover all the page cross edge cases.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-03-25 11:46:13 -05:00

358 lines
9.3 KiB
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/* Test and measure strcasecmp functions.
Copyright (C) 1999-2022 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 <locale.h>
#include <ctype.h>
#include <assert.h>
#define TEST_LEN (getpagesize () * 3)
#define MIN_PAGE_SIZE (TEST_LEN + 2 * getpagesize ())
#define TEST_MAIN
#define TEST_NAME "strcasecmp"
#include "test-string.h"
typedef int (*proto_t) (const char *, const char *);
static int simple_strcasecmp (const char *, const char *);
static int stupid_strcasecmp (const char *, const char *);
IMPL (stupid_strcasecmp, 0)
IMPL (simple_strcasecmp, 0)
IMPL (strcasecmp, 1)
static int
simple_strcasecmp (const char *s1, const char *s2)
{
int ret;
while ((ret = ((unsigned char) tolower (*s1)
- (unsigned char) tolower (*s2))) == 0
&& *s1++)
++s2;
return ret;
}
static int
stupid_strcasecmp (const char *s1, const char *s2)
{
size_t ns1 = strlen (s1) + 1, ns2 = strlen (s2) + 1;
size_t n = ns1 < ns2 ? ns1 : ns2;
int ret = 0;
while (n--)
{
if ((ret = ((unsigned char) tolower (*s1)
- (unsigned char) tolower (*s2))) != 0)
break;
++s1;
++s2;
}
return ret;
}
static void
do_one_test (impl_t *impl, const char *s1, const char *s2, int exp_result)
{
int result = CALL (impl, s1, s2);
if ((exp_result == 0 && result != 0)
|| (exp_result < 0 && result >= 0)
|| (exp_result > 0 && result <= 0))
{
error (0, 0, "Wrong result in function %s %d %d", impl->name,
result, exp_result);
ret = 1;
return;
}
}
static void
do_test (size_t align1, size_t align2, size_t len, int max_char,
int exp_result)
{
size_t i;
char *s1, *s2;
if (len == 0)
return;
align1 &= getpagesize () - 1;
if (align1 + (len + 1) >= page_size)
return;
align2 &= getpagesize () - 1;
if (align2 + (len + 1) >= page_size)
return;
s1 = (char *) (buf1 + align1);
s2 = (char *) (buf2 + align2);
for (i = 0; i < len; i++)
{
s1[i] = toupper (1 + 23 * i % max_char);
s2[i] = tolower (s1[i]);
}
s1[len] = s2[len] = 0;
s1[len + 1] = 23;
s2[len + 1] = 24 + exp_result;
if ((s2[len - 1] == 'z' && exp_result == -1)
|| (s2[len - 1] == 'a' && exp_result == 1))
s1[len - 1] += exp_result;
else if ((s1[len - 1] == 'Z' + 1 && exp_result == 1)
|| (s1[len - 1] == 'A' - 1 && exp_result == -1))
s1[len - 1] = tolower (s2[len - 1]) + exp_result;
else
s2[len - 1] -= exp_result;
/* For some locals this is not guranteed yet. */
if (tolower (s1[len - 1]) - tolower (s2[len - 1]) != exp_result)
{
if (exp_result == -1)
{
s1[len - 1] = tolower ('a');
s2[len - 1] = toupper (tolower ('a') - 1);
}
else if (exp_result == 0)
s1[len - 1] = toupper (s2[len - 1]);
else
{
s1[len - 1] = tolower ('a');
s2[len - 1] = toupper (tolower ('a') + 1);
}
}
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s1, s2, exp_result);
}
static void
do_random_tests (void)
{
size_t i, j, n, align1, align2, pos, len1, len2;
int result;
long r;
unsigned char *p1 = buf1 + page_size - 512;
unsigned char *p2 = buf2 + page_size - 512;
for (n = 0; n < ITERATIONS; n++)
{
align1 = random () & 31;
if (random () & 1)
align2 = random () & 31;
else
align2 = align1 + (random () & 24);
pos = random () & 511;
j = align1 > align2 ? align1 : align2;
if (pos + j >= 511)
pos = 510 - j - (random () & 7);
len1 = random () & 511;
if (pos >= len1 && (random () & 1))
len1 = pos + (random () & 7);
if (len1 + j >= 512)
len1 = 511 - j - (random () & 7);
if (pos >= len1)
len2 = len1;
else
len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0);
j = (pos > len2 ? pos : len2) + align1 + 64;
if (j > 512)
j = 512;
for (i = 0; i < j; ++i)
{
p1[i] = tolower (random () & 255);
if (i < len1 + align1 && !p1[i])
{
p1[i] = tolower (random () & 255);
if (!p1[i])
p1[i] = tolower (1 + (random () & 127));
}
}
for (i = 0; i < j; ++i)
{
p2[i] = toupper (random () & 255);
if (i < len2 + align2 && !p2[i])
{
p2[i] = toupper (random () & 255);
if (!p2[i])
toupper (p2[i] = 1 + (random () & 127));
}
}
result = 0;
memcpy (p2 + align2, p1 + align1, pos);
if (pos < len1)
{
if (tolower (p2[align2 + pos]) == p1[align1 + pos])
{
p2[align2 + pos] = toupper (random () & 255);
if (tolower (p2[align2 + pos]) == p1[align1 + pos])
p2[align2 + pos] = toupper (p1[align1 + pos]
+ 3 + (random () & 127));
}
if (p1[align1 + pos] < tolower (p2[align2 + pos]))
result = -1;
else
result = 1;
}
p1[len1 + align1] = 0;
p2[len2 + align2] = 0;
FOR_EACH_IMPL (impl, 1)
{
r = CALL (impl, (char *) (p1 + align1), (char *) (p2 + align2));
/* Test whether on 64-bit architectures where ABI requires
callee to promote has the promotion been done. */
asm ("" : "=g" (r) : "0" (r));
if ((r == 0 && result)
|| (r < 0 && result >= 0)
|| (r > 0 && result <= 0))
{
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",
n, impl->name, align1, align2, len1, len2, pos, r, result, p1, p2);
ret = 1;
}
}
}
}
static void
test_locale (const char *locale, int extra_tests)
{
size_t i, j, k;
const size_t test_len = MIN(TEST_LEN, 3 * 4096);
if (setlocale (LC_CTYPE, locale) == NULL)
{
error (0, 0, "cannot set locale \"%s\"", locale);
ret = 1;
}
printf ("%-23s", locale);
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 16; ++i)
{
do_test (i, i, i, 127, 0);
do_test (i, i, i, 127, 1);
do_test (i, i, i, 127, -1);
}
for (i = 1; i < 10; ++i)
{
do_test (0, 0, 2 << i, 127, 0);
do_test (0, 0, 2 << i, 254, 0);
do_test (0, 0, 2 << i, 127, 1);
do_test (0, 0, 2 << i, 254, 1);
do_test (0, 0, 2 << i, 127, -1);
do_test (0, 0, 2 << i, 254, -1);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 2 * i, 8 << i, 127, 0);
do_test (2 * i, i, 8 << i, 254, 0);
do_test (i, 2 * i, 8 << i, 127, 1);
do_test (2 * i, i, 8 << i, 254, 1);
do_test (i, 2 * i, 8 << i, 127, -1);
do_test (2 * i, i, 8 << i, 254, -1);
}
for (j = 0; extra_tests && j < 160; ++j)
{
for (i = 0; i < test_len;)
{
do_test (getpagesize () - j - 1, 0, i, 127, 0);
do_test (getpagesize () - j - 1, 0, i, 127, 1);
do_test (getpagesize () - j - 1, 0, i, 127, -1);
do_test (getpagesize () - j - 1, j, i, 127, 0);
do_test (getpagesize () - j - 1, j, i, 127, 1);
do_test (getpagesize () - j - 1, j, i, 127, -1);
do_test (0, getpagesize () - j - 1, i, 127, 0);
do_test (0, getpagesize () - j - 1, i, 127, 1);
do_test (0, getpagesize () - j - 1, i, 127, -1);
do_test (j, getpagesize () - j - 1, i, 127, 0);
do_test (j, getpagesize () - j - 1, i, 127, 1);
do_test (j, getpagesize () - j - 1, i, 127, -1);
for (k = 2; k <= 128; k += k)
{
do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, 0);
do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
0);
do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, 1);
do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
1);
do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, -1);
do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
-1);
}
if (i < 32)
{
i += 1;
}
else if (i < 161)
{
i += 7;
}
else if (i + 161 < test_len)
{
i += 31;
i *= 17;
i /= 16;
if (i + 161 > test_len)
{
i = test_len - 160;
}
}
else if (i + 32 < test_len)
{
i += 7;
}
else
{
i += 1;
}
}
}
do_random_tests ();
}
int
test_main (void)
{
test_init ();
test_locale ("C", 1);
test_locale ("en_US.ISO-8859-1", 0);
test_locale ("en_US.UTF-8", 0);
test_locale ("tr_TR.ISO-8859-9", 0);
test_locale ("tr_TR.UTF-8", 0);
return ret;
}
#include <support/test-driver.c>
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