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glibc/string/test-strchr.c
Siddhesh Poyarekar 67e3b0c63c tests/string: Drop simple/stupid/builtin tests 
In most cases the simple/stupid/builtin functions were in there to
benchmark optimized implementations against.  Only in some cases the
functions are used to check expected results.

Remove these tests from IMPL() and only keep them in wherever they're
used for a specific purpose, e.g. to generate expected results.

This improves timing of `make subdirs=string` by over a minute and a
half (over 15%) on a Whiskey Lake laptop.

Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Noah Goldstein <libc-alpha@sourceware.org>
2022-04-06 20:53:24 +05:30

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/* Test STRCHR 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/>. */
#define TEST_MAIN
#ifndef WIDE
# ifdef USE_FOR_STRCHRNUL
# define TEST_NAME "strchrnul"
# else
# define TEST_NAME "strchr"
# endif /* !USE_FOR_STRCHRNUL */
#else
# ifdef USE_FOR_STRCHRNUL
# define TEST_NAME "wcschrnul"
# else
# define TEST_NAME "wcschr"
# endif /* !USE_FOR_STRCHRNUL */
#endif /* WIDE */
#include "test-string.h"
#ifndef WIDE
# ifdef USE_FOR_STRCHRNUL
# define STRCHR strchrnul
# define simple_STRCHR simple_STRCHRNUL
# else
# define STRCHR strchr
# endif /* !USE_FOR_STRCHRNUL */
# define STRLEN strlen
# define CHAR char
# define BIG_CHAR CHAR_MAX
# define MIDDLE_CHAR 127
# define SMALL_CHAR 23
# define UCHAR unsigned char
# define L(s) s
#else
# include <wchar.h>
# ifdef USE_FOR_STRCHRNUL
# define STRCHR wcschrnul
# define simple_STRCHR simple_WCSCHRNUL
# else
# define STRCHR wcschr
# endif /* !USE_FOR_STRCHRNUL */
# define STRLEN wcslen
# define CHAR wchar_t
# define BIG_CHAR WCHAR_MAX
# define MIDDLE_CHAR 1121
# define SMALL_CHAR 851
# define UCHAR wchar_t
# define L(s) L ## s
#endif /* WIDE */
#ifdef USE_FOR_STRCHRNUL
# define NULLRET(endptr) endptr
#else
# define NULLRET(endptr) NULL
#endif /* !USE_FOR_STRCHRNUL */
typedef CHAR *(*proto_t) (const CHAR *, int);
/* Naive implementation to verify results. */
CHAR *
simple_STRCHR (const CHAR *s, int c)
{
size_t n = STRLEN (s) + 1;
while (n--)
if (*s++ == (CHAR) c)
return (CHAR *) s - 1;
return NULLRET ((CHAR *) s - 1);
}
IMPL (STRCHR, 1)
static int
check_result (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
{
CHAR *res = CALL (impl, s, c);
if (res != exp_res)
{
error (0, 0, "Wrong result in function %s %#x %p %p", impl->name,
c, res, exp_res);
ret = 1;
return -1;
}
return 0;
}
static void
do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
{
if (check_result (impl, s, c, exp_res) < 0)
return;
}
static void
do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
/* For wcschr: align here means align not in bytes,
but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
len for wcschr here isn't in bytes but it's number of wchar_t symbols. */
{
size_t i;
CHAR *result;
CHAR *buf = (CHAR *) buf1;
align &= 127;
if ((align + len) * sizeof (CHAR) >= page_size)
return;
for (i = 0; i < len; ++i)
{
buf[align + i] = 32 + 23 * i % max_char;
if (buf[align + i] == seek_char)
buf[align + i] = seek_char + 1;
else if (buf[align + i] == 0)
buf[align + i] = 1;
}
buf[align + len] = 0;
if (pos < len)
{
buf[align + pos] = seek_char;
result = buf + align + pos;
}
else if (seek_char == 0)
result = buf + align + len;
else
result = NULLRET (buf + align + len);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, buf + align, seek_char, result);
}
static void
do_random_tests (void)
{
size_t i, j, n, align, pos, len;
int seek_char;
CHAR *result;
UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
for (n = 0; n < ITERATIONS; n++)
{
/* For wcschr: align here means align not in bytes, but in wchar_ts,
in bytes it will equal to align * (sizeof (wchar_t)). */
align = random () & 15;
pos = random () & 511;
seek_char = random () & 255;
if (pos + align >= 511)
pos = 510 - align - (random () & 7);
/* len for wcschr here isn't in bytes but it's number of wchar_t
symbols. */
len = random () & 511;
if ((pos == len && seek_char)
|| (pos > len && (random () & 1)))
len = pos + 1 + (random () & 7);
if (len + align >= 512)
len = 511 - align - (random () & 7);
if (pos == len && seek_char)
len = pos + 1;
j = (pos > len ? pos : len) + align + 64;
if (j > 512)
j = 512;
for (i = 0; i < j; i++)
{
if (i == pos + align)
p[i] = seek_char;
else if (i == len + align)
p[i] = 0;
else
{
p[i] = random () & 255;
if (i < pos + align && p[i] == seek_char)
p[i] = seek_char + 13;
if (i < len + align && !p[i])
{
p[i] = seek_char - 13;
if (!p[i])
p[i] = 140;
}
}
}
if (pos <= len)
result = (CHAR *) (p + pos + align);
else if (seek_char == 0)
result = (CHAR *) (p + len + align);
else
result = NULLRET ((CHAR *) (p + len + 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 (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",
n, impl->name, align * sizeof (CHAR), seek_char, len, pos,
CALL (impl, (CHAR *) (p + align), seek_char), result, p);
ret = 1;
}
}
}
static void
check1 (void)
{
CHAR s[] __attribute__((aligned(16))) = L ("\xff");
CHAR c = L ('\xfe');
CHAR *exp_result = simple_STRCHR (s, c);
FOR_EACH_IMPL (impl, 0)
check_result (impl, s, c, exp_result);
}
int
test_main (void)
{
size_t i;
test_init ();
check1 ();
printf ("%20s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 8; ++i)
{
do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 16 << i, 4096, SMALL_CHAR, MIDDLE_CHAR);
do_test (i, 16 << i, 4096, SMALL_CHAR, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
}
for (i = 0; i < 8; ++i)
{
do_test (16 * i, 256, 512, SMALL_CHAR, MIDDLE_CHAR);
do_test (16 * i, 256, 512, SMALL_CHAR, BIG_CHAR);
}
for (i = 0; i < 32; ++i)
{
do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 16 << i, 4096, 0, MIDDLE_CHAR);
do_test (i, 16 << i, 4096, 0, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 64, 256, 0, MIDDLE_CHAR);
do_test (i, 64, 256, 0, BIG_CHAR);
}
for (i = 0; i < 8; ++i)
{
do_test (16 * i, 256, 512, 0, MIDDLE_CHAR);
do_test (16 * i, 256, 512, 0, BIG_CHAR);
}
for (i = 0; i < 32; ++i)
{
do_test (0, i, i + 1, 0, MIDDLE_CHAR);
do_test (0, i, i + 1, 0, BIG_CHAR);
}
do_random_tests ();
return ret;
}
#include <support/test-driver.c>
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