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Add strlcpy/wcslcpy testcase
This patch implements comprehensive tests for strlcpy/wcslcpy functions. Tests are mostly derived from strncpy test suites and modified to incorporate strlcpy/wcslcpy specifications. Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
Sunil K Pandey
DJ Delorie
parent
3333eb55b7
commit
23871292fb
@ -199,6 +199,7 @@ tests := \
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tst-strfry \
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tst-strlcat \
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tst-strlcpy \
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tst-strlcpy2 \
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tst-strlen \
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tst-strtok \
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tst-strtok_r \
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322
string/tst-strlcpy2.c
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322
string/tst-strlcpy2.c
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@ -0,0 +1,322 @@
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/* Test strlcpy functions.
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Copyright (C) 2023 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 "strlcpy"
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#else
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# define TEST_NAME "wcslcpy"
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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 MEMSET wmemset
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# define SIMPLE_STRLCPY simple_wcslcpy
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# define SMALL_CHAR 1273
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# define STRLCPY wcslcpy
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# define STRLEN wcslen
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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 MEMSET memset
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# define SIMPLE_STRLCPY simple_strlcpy
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# define SMALL_CHAR 127
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# define STRLCPY strlcpy
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# define STRLEN strlen
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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_STRLCPY (CHAR *dst, const CHAR *src, size_t n)
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{
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size_t ret = STRLEN (src);
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if (!n)
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return ret;
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while (--n)
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if ((*dst++ = *src++) == '\0')
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return ret;
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*dst = '\0';
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return ret;
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}
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IMPL (SIMPLE_STRLCPY, 0)
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IMPL (STRLCPY, 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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do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t len, size_t n)
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{
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if (CALL (impl, dst, src, n) != 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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CALL (impl, dst, src, n), len);
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ret = 1;
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return;
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}
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if (n == 0)
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return;
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len = (len >= n ? n - 1 : len);
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if (MEMCMP (dst, src, len) != 0)
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{
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error (0, 0, "Wrong result in function1 %s", impl->name);
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ret = 1;
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return;
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}
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if (dst [len] != '\0')
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{
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error (0, 0, "Wrong result in function2 %s", 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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static void
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do_test (size_t align1, size_t align2, size_t len, 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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/* For wcslcpy: align1 and align2 here mean alignment not in bytes,
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but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)). */
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align1 &= 7;
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if ((align1 + len) * sizeof (CHAR) >= page_size)
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return;
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align2 &= 7;
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if ((align2 + len) * 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 < len; ++i)
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s1[i] = 32 + 23 * i % (max_char - 32);
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s1[len] = 0;
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, s2, s1, len, n);
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}
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static void
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do_page_tests (void)
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{
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CHAR *s1, *s2;
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const size_t maxoffset = 64;
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/* Put s1 at the maxoffset from the edge of buf1's last page. */
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s1 = (CHAR *) buf1 + BUF1PAGES * page_size / sizeof(CHAR) - maxoffset;
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/* s2 needs room to put a string with size of maxoffset + 1 at s2 +
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(maxoffset - 1). */
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s2 = (CHAR *) buf2 + page_size / sizeof(CHAR) - maxoffset * 2;
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MEMSET (s1, 'a', maxoffset - 1);
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s1[maxoffset - 1] = '\0';
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/* Both strings are bounded to a page with read/write access and the next
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page is protected with PROT_NONE (meaning that any access outside of the
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page regions will trigger an invalid memory access).
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The loop copies the string s1 for all possible offsets up to maxoffset
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for both inputs with a size larger than s1 (so memory access outside the
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expected memory regions might trigger invalid access). */
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for (size_t off1 = 0; off1 < maxoffset; off1++)
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{
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for (size_t off2 = 0; off2 < maxoffset; off2++)
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{
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, s2 + off2, s1 + off1, maxoffset - off1 - 1,
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maxoffset + (maxoffset - off2));
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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, len, size, mode;
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CHAR *p1 = (CHAR *) (buf1 + page_size) - 1024;
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CHAR *p2 = (CHAR *) (buf2 + page_size) - 1024;
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size_t res;
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for (n = 0; n < ITERATIONS; n++)
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{
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/* For wcslcpy: align1 and align2 here mean align not in bytes,
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but in wchar_ts, in bytes it will equal to align * (sizeof
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(wchar_t)). */
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mode = random ();
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if (mode & 1)
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{
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size = random () & 255;
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align1 = 512 - size - (random () & 15);
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if (mode & 2)
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align2 = align1 - (random () & 24);
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else
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align2 = align1 - (random () & 31);
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if (mode & 4)
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{
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j = align1;
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align1 = align2;
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align2 = j;
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}
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if (mode & 8)
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len = size - (random () & 31);
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else
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len = 512;
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if (len >= 512)
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len = random () & 511;
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}
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else
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{
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align1 = random () & 31;
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if (mode & 2)
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align2 = random () & 31;
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else
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align2 = align1 + (random () & 24);
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len = random () & 511;
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j = align1;
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if (align2 > j)
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j = align2;
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if (mode & 4)
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{
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size = random () & 511;
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if (size + j > 512)
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size = 512 - j - (random () & 31);
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}
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else
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size = 512 - j;
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if ((mode & 8) && len + j >= 512)
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len = 512 - j - (random () & 7);
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}
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j = len + align1;
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for (i = 0; i < j; i++)
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{
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p1[i] = random () & BIG_CHAR;
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if (i >= align1 && i < len + align1 && !p1[i])
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p1[i] = (random () & SMALL_CHAR) + 3;
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}
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p1[i] = 0;
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FOR_EACH_IMPL (impl, 1)
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{
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MEMSET (p2 - 64, '\1', 512 + 64);
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res = CALL (impl, (CHAR *) (p2 + align2),
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(CHAR *) (p1 + align1), size);
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if (res != len)
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{
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error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd) %zd != %zd",
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n, impl->name, align1, align2, len, res);
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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, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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break;
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}
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}
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j = align2 + len + 1;
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if (size + align2 > j)
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j = size + align2;
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for (; j < 512; ++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 (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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break;
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}
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}
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j = len;
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/* Check for zero size. */
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if (size)
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{
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if (size <= j)
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j = size - 1;
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if (MEMCMP (p1 + align1, p2 + align2, j))
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{
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error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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}
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if (p2[align2 + j])
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{
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error (0, 0, "Iteration %zd - garbage after size, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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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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}
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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;
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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 (i = 1; i < 8; ++i)
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{
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do_test (i, i, 16, 16, SMALL_CHAR);
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do_test (i, i, 16, 16, BIG_CHAR);
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do_test (i, 2 * i, 16, 16, SMALL_CHAR);
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do_test (2 * i, i, 16, 16, BIG_CHAR);
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do_test (8 - i, 2 * i, 1 << i, 2 << i, SMALL_CHAR);
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do_test (2 * i, 8 - i, 2 << i, 1 << i, SMALL_CHAR);
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do_test (8 - i, 2 * i, 1 << i, 2 << i, BIG_CHAR);
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do_test (2 * i, 8 - i, 2 << i, 1 << i, BIG_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 (0, 0, 4 << i, 8 << i, SMALL_CHAR);
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do_test (0, 0, 16 << i, 8 << i, SMALL_CHAR);
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do_test (8 - i, 2 * i, 4 << i, 8 << i, SMALL_CHAR);
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do_test (8 - i, 2 * i, 16 << i, 8 << i, SMALL_CHAR);
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}
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do_random_tests ();
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do_page_tests ();
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return ret;
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}
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#include <support/test-driver.c>
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@ -180,6 +180,7 @@ tests := \
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tst-wcrtomb \
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tst-wcslcat \
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tst-wcslcpy \
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tst-wcslcpy2 \
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tst-wcsnlen \
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tst-wcstod-nan-locale \
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tst-wcstod-nan-sign \
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20
wcsmbs/tst-wcslcpy2.c
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20
wcsmbs/tst-wcslcpy2.c
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@ -0,0 +1,20 @@
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/* Test wcslcpy functions.
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Copyright (C) 2023 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 WIDE 1
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#include "../string/tst-strlcpy2.c"
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