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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>
326 lines
8.5 KiB
C
326 lines
8.5 KiB
C
/* Test strlen 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 "strnlen"
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#else
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# define TEST_NAME "wcsnlen"
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#endif /* !WIDE */
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#include "test-string.h"
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#ifndef WIDE
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# define STRNLEN strnlen
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# define MEMSET memset
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# define CHAR char
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# define BIG_CHAR CHAR_MAX
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# define MIDDLE_CHAR 127
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# define SIMPLE_STRNLEN simple_strnlen
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#else
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# include <wchar.h>
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# define STRNLEN wcsnlen
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# define MEMSET wmemset
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# define CHAR wchar_t
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# define BIG_CHAR WCHAR_MAX
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# define MIDDLE_CHAR 1121
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# define SIMPLE_STRNLEN simple_wcsnlen
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#endif /* !WIDE */
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typedef size_t (*proto_t) (const CHAR *, size_t);
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size_t SIMPLE_STRNLEN (const CHAR *, size_t);
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IMPL (SIMPLE_STRNLEN, 0)
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IMPL (STRNLEN, 1)
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size_t
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SIMPLE_STRNLEN (const CHAR *s, size_t maxlen)
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{
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size_t i;
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for (i = 0; i < maxlen && s[i]; ++i);
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return i;
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}
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static void
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do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
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{
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size_t len = CALL (impl, s, maxlen);
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if (len != exp_len)
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{
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error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
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len, exp_len);
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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 len, size_t maxlen, int max_char)
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{
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size_t i;
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align &= 63;
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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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buf[align + i] = 1 + 11111 * i % max_char;
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buf[align + len] = 0;
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen));
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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, SIZE_MAX - i, BIG_CHAR);
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do_test (0, i, i - buf_addr, BIG_CHAR);
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do_test (0, i, -buf_addr - i, BIG_CHAR);
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do_test (0, i, SIZE_MAX - buf_addr - i, BIG_CHAR);
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do_test (0, i, 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, len - i, BIG_CHAR);
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do_test (0, i, len + i, BIG_CHAR);
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do_test (0, i, len - buf_addr - i, BIG_CHAR);
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do_test (0, i, len - buf_addr + i, BIG_CHAR);
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do_test (0, i, ~len - i, BIG_CHAR);
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do_test (0, i, ~len + i, BIG_CHAR);
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do_test (0, i, ~len - buf_addr - i, BIG_CHAR);
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do_test (0, i, ~len - buf_addr + i, BIG_CHAR);
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do_test (0, i, -buf_addr, BIG_CHAR);
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do_test (0, i, j - buf_addr, BIG_CHAR);
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do_test (0, i, -buf_addr - j, 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, len;
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CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
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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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len = random () & 511;
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if (len + align > 510)
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len = 511 - align - (random () & 7);
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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 == len + align)
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p[i] = 0;
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else
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{
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p[i] = random () & 255;
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if (i >= align && i < len + align && !p[i])
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p[i] = (random () & 127) + 1;
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}
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}
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FOR_EACH_IMPL (impl, 1)
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{
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if (len > 0
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&& CALL (impl, (CHAR *) (p + align), len - 1) != len - 1)
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{
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error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p",
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n, impl->name, align,
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CALL (impl, (CHAR *) (p + align), len - 1), len - 1, p);
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ret = 1;
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}
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if (CALL (impl, (CHAR *) (p + align), len) != len)
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{
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error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p",
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n, impl->name, align,
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CALL (impl, (CHAR *) (p + align), len), len, p);
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ret = 1;
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}
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if (CALL (impl, (CHAR *) (p + align), len + 1) != len)
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{
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error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p",
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n, impl->name, align,
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CALL (impl, (CHAR *) (p + align), len + 1), len, p);
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ret = 1;
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}
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}
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}
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}
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/* Tests meant to unveil fail on implementation that does not access bytes
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around the page boundary accordingly. */
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static void
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do_page_tests (void)
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{
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size_t i, exp_len, start_offset, offset;
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/* Calculate the null character offset. */
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size_t last_offset = (page_size / sizeof (CHAR)) - 1;
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CHAR *s = (CHAR *) buf2;
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MEMSET (s, 65, (last_offset - 1));
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s[last_offset] = 0;
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/* Place short strings ending at page boundary. */
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offset = last_offset;
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for (i = 0; i < 128; i++)
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{
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/* Decrease offset to stress several sizes and alignments. */
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offset--;
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exp_len = last_offset - offset;
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FOR_EACH_IMPL (impl, 0)
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{
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/* Varies maxlen value to cover the cases where it is:
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- larger than length;
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- slightly greater than length;
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- equal to length;
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- slightly less than length. */
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do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len);
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do_one_test (impl, (CHAR *) (s + offset), exp_len + 1, exp_len);
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do_one_test (impl, (CHAR *) (s + offset), exp_len, exp_len);
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if (exp_len > 0)
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do_one_test (impl, (CHAR *) (s + offset), exp_len - 1, exp_len - 1);
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}
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}
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/* Place long strings ending at page boundary. */
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start_offset = (last_offset + 1) / 2;
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for (i = 0; i < 64; ++i)
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{
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/* Increase offset to stress several alignments. */
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offset = start_offset + i;
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if (offset >= (last_offset + 1))
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break;
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exp_len = last_offset - offset;
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FOR_EACH_IMPL (impl, 0)
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{
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/* Checks only for maxlen much larger than length because smaller
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values are already covered in do_random_tests function. */
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do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len);
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}
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}
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}
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/* Tests meant to unveil fail on implementations that access bytes
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beyond the maxium length. */
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static void
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do_page_2_tests (void)
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{
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size_t i, exp_len, offset;
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size_t last_offset = page_size / sizeof (CHAR);
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CHAR *s = (CHAR *) buf2;
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MEMSET (s, 65, last_offset);
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/* Place short strings ending at page boundary without the null
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byte. */
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offset = last_offset;
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for (i = 0; i < 128; i++)
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{
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/* Decrease offset to stress several sizes and alignments. */
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offset--;
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exp_len = last_offset - offset;
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FOR_EACH_IMPL (impl, 0)
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{
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/* If an implementation goes beyond EXP_LEN, it will trigger
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the segfault. */
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do_one_test (impl, (CHAR *) (s + offset), exp_len, exp_len);
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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, length, char_per_page;
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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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do_test (0, i, i - 1, MIDDLE_CHAR);
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do_test (0, i, i, MIDDLE_CHAR);
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do_test (0, i, i + 1, MIDDLE_CHAR);
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}
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for (i = 1; i < 8; ++i)
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{
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do_test (i, i, i - 1, MIDDLE_CHAR);
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do_test (i, i, i, MIDDLE_CHAR);
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do_test (i, i, i + 1, MIDDLE_CHAR);
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}
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for (i = 2; i <= 10; ++i)
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{
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do_test (0, 1 << i, 5000, MIDDLE_CHAR);
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do_test (1, 1 << i, 5000, MIDDLE_CHAR);
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}
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for (i = 1; i < 8; ++i)
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do_test (0, i, 5000, BIG_CHAR);
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for (i = 1; i < 8; ++i)
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do_test (i, i, 5000, BIG_CHAR);
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for (i = 2; i <= 10; ++i)
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{
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do_test (0, 1 << i, 5000, BIG_CHAR);
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do_test (1, 1 << i, 5000, BIG_CHAR);
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}
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char_per_page = getpagesize () / sizeof (CHAR);
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for (i = 0; i <= 127; i++)
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for (length = i; length <= 512; length++)
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{
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do_test (i, length, 512, BIG_CHAR);
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do_test (char_per_page - i, length, 512, BIG_CHAR);
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}
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do_random_tests ();
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do_page_tests ();
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do_page_2_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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