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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
260 lines
6.4 KiB
C
260 lines
6.4 KiB
C
/* Test memchr functions.
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Copyright (C) 1999-2021 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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CHAR *SIMPLE_MEMCHR (const CHAR *, int, size_t);
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IMPL (SIMPLE_MEMCHR, 0)
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IMPL (MEMCHR, 1)
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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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