mirror of
https://sourceware.org/git/glibc.git
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403 lines
9.8 KiB
C
403 lines
9.8 KiB
C
/* Test strlcat functions.
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Copyright (C) 2023-2025 Free Software Foundation, Inc.
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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 "strlcat"
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#else
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# define TEST_NAME "wcslcat"
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#endif /* WIDE */
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#include "test-string.h"
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#ifdef WIDE
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# include <wchar.h>
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# define BIG_CHAR WCHAR_MAX
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# define CHAR wchar_t
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# define MEMCMP wmemcmp
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# define MEMCPY wmemcpy
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# define MEMSET wmemset
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# define SIMPLE_STRLCAT simple_wcslcat
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# define SMALL_CHAR 1273
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# define STRLCAT wcslcat
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# define STRLEN wcslen
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# define STRNLEN wcsnlen
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# define UCHAR wchar_t
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#else
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# define BIG_CHAR CHAR_MAX
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# define CHAR char
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# define MEMCMP memcmp
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# define MEMCPY memcpy
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# define MEMSET memset
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# define SMALL_CHAR 127
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# define SIMPLE_STRLCAT simple_strlcat
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# define STRLCAT strlcat
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# define STRLEN strlen
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# define STRNLEN strnlen
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# define UCHAR unsigned char
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#endif /* !WIDE */
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/* Naive implementation to verify results. */
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size_t
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SIMPLE_STRLCAT (CHAR *dst, const CHAR *src, size_t n)
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{
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size_t src_length = STRLEN (src);
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if (n == 0)
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return src_length;
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size_t dst_length = STRNLEN (dst, n);
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if (dst_length != n)
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{
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size_t to_copy = n - dst_length - 1;
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if (to_copy > src_length)
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to_copy = src_length;
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CHAR *target = dst + dst_length;
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MEMCPY (target, src, to_copy);
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target[to_copy] = '\0';
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}
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return dst_length + src_length;
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}
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IMPL (SIMPLE_STRLCAT, 0)
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IMPL (STRLCAT, 1)
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typedef size_t (*proto_t) (CHAR *, const CHAR *, size_t);
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static void
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__attribute__((noinline))
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do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,
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size_t n)
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{
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size_t exp_ret, func_ret;
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size_t src_length = STRLEN (src);
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size_t dst_length = STRNLEN (dst, n);
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if (n == 0)
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exp_ret = src_length;
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else
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exp_ret = src_length + dst_length;
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func_ret = CALL (impl, dst, src, n);
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if (exp_ret != func_ret)
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{
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error (0, 0, "Wrong result in function %s %zd != %zd", impl->name,
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exp_ret, func_ret);
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ret = 1;
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return;
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}
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if (dst_length != n)
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{
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size_t to_copy = n - dst_length - 1;
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if (to_copy > src_length)
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to_copy = src_length;
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if (MEMCMP (dst + dst_length, src, to_copy) != 0)
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{
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error (0, 0, "Incorrect concatenation in function %s",
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impl->name);
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ret = 1;
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return;
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}
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if (dst[dst_length + to_copy] != '\0')
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{
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error (0, 0, "There is no zero in the end of output string in %s",
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impl->name);
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ret = 1;
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return;
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}
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}
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return;
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}
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static void
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do_test (size_t align1, size_t align2, size_t len1, size_t len2,
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size_t n, int max_char)
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{
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size_t i;
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CHAR *s1, *s2;
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align1 &= 7;
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if ((align1 + len1) * sizeof (CHAR) >= page_size)
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return;
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if ((align1 + n) * sizeof (CHAR) > page_size)
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return;
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align2 &= 7;
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if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
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return;
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if ((align2 + len1 + n) * sizeof (CHAR) > page_size)
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return;
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s1 = (CHAR *) (buf1) + align1;
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s2 = (CHAR *) (buf2) + align2;
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for (i = 0; i < len1; ++i)
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s1[i] = 32 + 23 * i % (max_char - 32);
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s1[len1] = '\0';
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FOR_EACH_IMPL (impl, 0)
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{
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for (i = 0; i < len2; i++)
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s2[i] = 32 + 23 * i % (max_char - 32);
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s2[len2] = '\0';
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do_one_test (impl, s2, s1, n);
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}
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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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CHAR *s1, *s2;
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uintptr_t s1_addr;
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s1 = (CHAR *) buf1;
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s2 = (CHAR *) buf2;
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s1_addr = (uintptr_t)s1;
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for (j = 0; j < 200; ++j)
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s2[j] = 32 + 23 * j % (BIG_CHAR - 32);
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s2[200] = 0;
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for (i = 0; i < 750; ++i) {
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for (j = 0; j < i; ++j)
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s1[j] = 32 + 23 * j % (BIG_CHAR - 32);
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s1[i] = '\0';
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FOR_EACH_IMPL (impl, 0)
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{
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s2[200] = '\0';
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do_one_test (impl, s2, s1, SIZE_MAX - i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, i - s1_addr);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, -s1_addr - i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, SIZE_MAX - s1_addr - i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, SIZE_MAX - s1_addr + i);
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}
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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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FOR_EACH_IMPL (impl, 0)
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{
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s2[200] = '\0';
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do_one_test (impl, s2, s1, len - i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, len + i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, len - s1_addr - i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, len - s1_addr + i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, ~len - i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, ~len + i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, ~len - s1_addr - i);
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s2[200] = '\0';
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do_one_test (impl, s2, s1, ~len - s1_addr + i);
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}
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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, align1, align2, len1, len2, N;
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UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 1024;
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UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 1024;
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UCHAR *p3 = (UCHAR *) buf1;
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size_t res;
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fprintf (stdout, "Number of iterations in random test = %zd\n",
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ITERATIONS);
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for (n = 0; n < ITERATIONS; n++)
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{
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N = random () & 1023;
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align1 = random () & 255;
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align2 = random () & 255;
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len1 = random () & 255;
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len2 = random () & 255;
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for (i = 0; i < len1; i++)
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{
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p1[align1 + i] = random () & BIG_CHAR;
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if (!p1[align1 + i])
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p1[align1 + i] = (random () & SMALL_CHAR) + 3;
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}
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p1[align1 + len1] = 0;
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for (i = 0; i < len2; i++)
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{
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p3[i] = random () & BIG_CHAR;
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if (!p3[i])
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p3[i] = (random () & SMALL_CHAR) + 3;
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}
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p3[len2] = 0;
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size_t exp_ret;
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size_t src_length = STRLEN ((CHAR *) (p1 + align1));
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size_t dst_length = STRNLEN ((CHAR *) (p3), N);
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if (N == 0)
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exp_ret = src_length;
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else
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exp_ret = src_length + dst_length;
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FOR_EACH_IMPL (impl, 1)
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{
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MEMSET (p2 - 64, '\1', align2 + 64);
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MEMSET (p2 + align2 + len2 + 1, '\1', 1024 - align2 - len2 - 1);
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MEMCPY (p2 + align2, p3, len2 + 1);
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res = CALL (impl, (CHAR *) (p2 + align2),
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(CHAR *) (p1 + align1), N);
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if (res != exp_ret)
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{
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error (0, 0, "Iteration %zd - wrong result in function %s "
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"(%zd, %zd, %zd, %zd, %zd) %zd != %zd",
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n, impl->name, align1, align2, len1, len2, N,
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res, exp_ret);
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ret = 1;
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}
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for (j = 0; j < align2 + 64; ++j)
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{
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if (p2[j - 64] != '\1')
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{
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error (0, 0, "Iteration %zd - garbage before dst, %s "
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"%zd, %zd, %zd, %zd, %zd)",
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n, impl->name, align1, align2, len1, len2, N);
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ret = 1;
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break;
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}
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}
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if (MEMCMP (p2 + align2, p3, len2))
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{
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error (0, 0, "Iteration %zd - garbage in string before, %s "
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"(%zd, %zd, %zd, %zd, %zd)",
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n, impl->name, align1, align2, len1, len2, N);
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ret = 1;
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}
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if (N > len2 + 1)
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{
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j = (N - len2 - 1 >= len1) ? len1 : N - len2 - 1;
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if (MEMCMP (p2 + align2 + len2, p1 + align1, j))
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{
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error (0, 0, "Iteration %zd - different strings, %s "
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"(%zd, %zd, %zd, %zd)", n, impl->name, align1,
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align2, len2, j);
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ret = 1;
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}
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if (p2[align2 + len2 + j] != '\0')
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{
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error (0, 0, "Iteration %zd - there is no zero at the "
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"end of output string, %s (%zd, %zd, %zd, %zd, %zd)",
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n, impl->name, align1, align2, len1, len2, N);
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ret = 1;
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}
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for (j = j + align2 + len2 + 1; j < 1024; ++j)
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{
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if (p2[j] != '\1')
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{
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error (0, 0, "Iteration %zd - garbage after, %s "
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"(%zd, %zd, %zd, %zd, %zd)",
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n, impl->name, align1, align2, len1, len2, N);
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ret = 1;
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break;
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}
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}
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}
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else
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{
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if (p2[align2 + len2] != '\0')
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{
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error (0, 0, "Iteration %zd - destination modified, %s "
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"(%zd, %zd, %zd, %zd, %zd)",
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n, impl->name, align1, align2, len1, len2, N);
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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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}
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int
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test_main (void)
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{
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size_t i, n;
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test_init ();
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printf ("%28s", "");
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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 (n = 2; n <= 2048; n*=4)
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{
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do_test (0, 2, 2, 2, n, SMALL_CHAR);
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do_test (0, 0, 4, 4, n, SMALL_CHAR);
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do_test (4, 0, 4, 4, n, BIG_CHAR);
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do_test (0, 0, 8, 8, n, SMALL_CHAR);
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do_test (0, 8, 8, 8, n, SMALL_CHAR);
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do_test (0, 2, 2, 2, SIZE_MAX, SMALL_CHAR);
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do_test (0, 0, 4, 4, SIZE_MAX, SMALL_CHAR);
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do_test (4, 0, 4, 4, SIZE_MAX, BIG_CHAR);
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do_test (0, 0, 8, 8, SIZE_MAX, SMALL_CHAR);
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do_test (0, 8, 8, 8, SIZE_MAX, SMALL_CHAR);
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for (i = 1; i < 8; ++i)
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{
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do_test (0, 0, 8 << i, 8 << i, n, SMALL_CHAR);
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do_test (8 - i, 2 * i, 8 << i, 8 << i, n, SMALL_CHAR);
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do_test (0, 0, 8 << i, 2 << i, n, SMALL_CHAR);
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do_test (8 - i, 2 * i, 8 << i, 2 << i, n, SMALL_CHAR);
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do_test (0, 0, 8 << i, 8 << i, SIZE_MAX, SMALL_CHAR);
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do_test (8 - i, 2 * i, 8 << i, 8 << i, SIZE_MAX, SMALL_CHAR);
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do_test (0, 0, 8 << i, 2 << i, SIZE_MAX, SMALL_CHAR);
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do_test (8 - i, 2 * i, 8 << i, 2 << i, SIZE_MAX, SMALL_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, 2 * i, 8 << i, 1, n, SMALL_CHAR);
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do_test (2 * i, i, 8 << i, 1, n, BIG_CHAR);
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do_test (i, i, 8 << i, 10, n, SMALL_CHAR);
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do_test (i, 2 * i, 8 << i, 1, SIZE_MAX, SMALL_CHAR);
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do_test (2 * i, i, 8 << i, 1, SIZE_MAX, BIG_CHAR);
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do_test (i, i, 8 << i, 10, SIZE_MAX, SMALL_CHAR);
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}
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}
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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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