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67e3b0c63c
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>
259 lines
6.4 KiB
C
259 lines
6.4 KiB
C
/* Test memchr functions.
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Copyright (C) 1999-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define TEST_MAIN
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#ifndef WIDE
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# define TEST_NAME "memchr"
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#else
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# define TEST_NAME "wmemchr"
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#endif /* WIDE */
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#include "test-string.h"
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#include <stdint.h>
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#ifndef WIDE
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# define MEMCHR memchr
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# define CHAR char
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# define UCHAR unsigned char
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# define SIMPLE_MEMCHR simple_memchr
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# define BIG_CHAR CHAR_MAX
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# define SMALL_CHAR 127
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#else
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# include <wchar.h>
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# define MEMCHR wmemchr
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# define CHAR wchar_t
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# define UCHAR wchar_t
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# define SIMPLE_MEMCHR simple_wmemchr
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# define BIG_CHAR WCHAR_MAX
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# define SMALL_CHAR 1273
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#endif /* WIDE */
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typedef CHAR *(*proto_t) (const CHAR *, int, size_t);
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IMPL (MEMCHR, 1)
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/* Naive implementation to verify results. */
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CHAR *
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SIMPLE_MEMCHR (const CHAR *s, int c, size_t n)
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{
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while (n--)
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if (*s++ == (CHAR) c)
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return (CHAR *) s - 1;
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return NULL;
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}
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static void
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do_one_test (impl_t *impl, const CHAR *s, int c, size_t n, CHAR *exp_res)
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{
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CHAR *res = CALL (impl, s, c, n);
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if (res != exp_res)
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{
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error (0, 0, "Wrong result in function %s (%p, %d, %zu) -> %p != %p",
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impl->name, s, c, n, res, exp_res);
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ret = 1;
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return;
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}
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}
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static void
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do_test (size_t align, size_t pos, size_t len, size_t n, int seek_char)
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{
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size_t i;
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CHAR *result;
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if ((align + len) * sizeof (CHAR) >= page_size)
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return;
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CHAR *buf = (CHAR *) (buf1);
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for (i = 0; i < len; ++i)
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{
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buf[align + i] = 1 + 23 * i % SMALL_CHAR;
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if (buf[align + i] == seek_char)
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buf[align + i] = seek_char + 1;
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}
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buf[align + len] = 0;
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if (pos < MIN(n, len))
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{
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buf[align + pos] = seek_char;
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buf[align + len] = -seek_char;
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result = (CHAR *) (buf + align + pos);
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}
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else
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{
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result = NULL;
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buf[align + len] = seek_char;
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}
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, (CHAR *) (buf + align), seek_char, n, result);
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}
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static void
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do_overflow_tests (void)
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{
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size_t i, j, len;
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const size_t one = 1;
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uintptr_t buf_addr = (uintptr_t) buf1;
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for (i = 0; i < 750; ++i)
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{
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do_test (0, i, 751, SIZE_MAX - i, BIG_CHAR);
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do_test (0, i, 751, i - buf_addr, BIG_CHAR);
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do_test (0, i, 751, -buf_addr - i, BIG_CHAR);
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do_test (0, i, 751, SIZE_MAX - buf_addr - i, BIG_CHAR);
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do_test (0, i, 751, SIZE_MAX - buf_addr + i, BIG_CHAR);
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len = 0;
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for (j = 8 * sizeof(size_t) - 1; j ; --j)
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{
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len |= one << j;
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do_test (0, i, 751, len - i, BIG_CHAR);
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do_test (0, i, 751, len + i, BIG_CHAR);
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do_test (0, i, 751, len - buf_addr - i, BIG_CHAR);
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do_test (0, i, 751, len - buf_addr + i, BIG_CHAR);
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do_test (0, i, 751, ~len - i, BIG_CHAR);
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do_test (0, i, 751, ~len + i, BIG_CHAR);
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do_test (0, i, 751, ~len - buf_addr - i, BIG_CHAR);
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do_test (0, i, 751, ~len - buf_addr + i, BIG_CHAR);
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}
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}
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}
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static void
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do_random_tests (void)
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{
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size_t i, j, n, align, pos, len;
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int seek_char;
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CHAR *result;
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UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
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for (n = 0; n < ITERATIONS; n++)
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{
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align = random () & 15;
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pos = random () & 511;
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if (pos + align >= 512)
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pos = 511 - align - (random () & 7);
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len = random () & 511;
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if (pos >= len)
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len = pos + (random () & 7);
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if (len + align >= 512)
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len = 512 - align - (random () & 7);
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seek_char = random () & BIG_CHAR;
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j = len + align + 64;
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if (j > 512)
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j = 512;
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for (i = 0; i < j; i++)
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{
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if (i == pos + align)
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p[i] = seek_char;
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else
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{
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p[i] = random () & BIG_CHAR;
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if (i < pos + align && p[i] == seek_char)
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p[i] = seek_char + 13;
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}
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}
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if (pos < len)
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{
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size_t r = random ();
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if ((r & 31) == 0)
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len = ~(uintptr_t) (p + align) - ((r >> 5) & 31);
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result = (CHAR *) (p + pos + align);
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}
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else
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result = NULL;
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FOR_EACH_IMPL (impl, 1)
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if (CALL (impl, (CHAR *) (p + align), seek_char, len) != result)
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{
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error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
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n, impl->name, align, seek_char, len, pos,
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CALL (impl, (CHAR *) (p + align), seek_char, len),
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result, p);
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ret = 1;
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}
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}
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}
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int
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test_main (void)
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{
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size_t i, j;
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test_init ();
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printf ("%20s", "");
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FOR_EACH_IMPL (impl, 0)
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printf ("\t%s", impl->name);
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putchar ('\n');
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for (i = 1; i < 8; ++i)
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{
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/* Test n == 0. */
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do_test (i, i, 0, 0, 23);
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do_test (i, i, 0, 0, 0);
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do_test (0, 16 << i, 2048, 2048, 23);
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do_test (i, 64, 256, 256, 23);
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do_test (0, 16 << i, 2048, 2048, 0);
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do_test (i, 64, 256, 256, 0);
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/* Check for large input sizes and for these cases we need to
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make sure the byte is within the size range (that's why
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7 << i must be smaller than 2048). */
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do_test (0, 7 << i, 2048, SIZE_MAX, 23);
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do_test (0, 2048 - i, 2048, SIZE_MAX, 23);
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do_test (i, 64, 256, SIZE_MAX, 23);
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do_test (0, 7 << i, 2048, SIZE_MAX, 0);
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do_test (0, 2048 - i, 2048, SIZE_MAX, 0);
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do_test (i, 64, 256, SIZE_MAX, 0);
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}
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for (i = 1; i < 64; ++i)
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{
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for (j = 1; j < 64; j++)
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{
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do_test (0, 64 - j, 64, SIZE_MAX, 23);
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do_test (i, 64 - j, 64, SIZE_MAX, 23);
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}
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}
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for (i = 1; i < 32; ++i)
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{
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do_test (0, i, i + 1, i + 1, 23);
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do_test (0, i, i + 1, i + 1, 0);
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}
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/* BZ#21182 - wrong overflow calculation for i686 implementation
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with address near end of the page. */
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for (i = 2; i < 16; ++i)
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/* page_size is in fact getpagesize() * 2. */
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do_test (page_size / 2 - i, i, i, 1, 0x9B);
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do_random_tests ();
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do_overflow_tests ();
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return ret;
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}
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#include <support/test-driver.c>
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