diff --git a/lib/libc/tests/string/Makefile b/lib/libc/tests/string/Makefile index a090e1bd3463..5874f7b6b873 100644 --- a/lib/libc/tests/string/Makefile +++ b/lib/libc/tests/string/Makefile @@ -1,52 +1,53 @@ # ensure libc functions are tested, not clang's builtins CFLAGS+= -fno-builtin ATF_TESTS_C+= bcmp_test ATF_TESTS_C+= ffs_test ATF_TESTS_C+= ffsl_test ATF_TESTS_C+= ffsll_test ATF_TESTS_C+= fls_test ATF_TESTS_C+= flsl_test ATF_TESTS_C+= flsll_test ATF_TESTS_C+= memcmp_test ATF_TESTS_C+= memset_s_test +ATF_TESTS_C+= strncmp_test ATF_TESTS_C+= stpncpy_test ATF_TESTS_C+= strcmp2_test ATF_TESTS_C+= strcspn_test ATF_TESTS_C+= strerror2_test ATF_TESTS_C+= strspn_test ATF_TESTS_C+= strverscmp_test ATF_TESTS_C+= strxfrm_test ATF_TESTS_C+= timingsafe_bcmp_test ATF_TESTS_C+= timingsafe_memcmp_test ATF_TESTS_C+= wcscasecmp_test ATF_TESTS_C+= wcscoll_test ATF_TESTS_C+= wcsnlen_test # TODO: popcount, stresep NETBSD_ATF_TESTS_C+= memchr_test NETBSD_ATF_TESTS_C+= memcpy_test NETBSD_ATF_TESTS_C+= memmem_test NETBSD_ATF_TESTS_C+= memset_test NETBSD_ATF_TESTS_C+= strcat_test NETBSD_ATF_TESTS_C+= strchr_test NETBSD_ATF_TESTS_C+= strchrnul_test NETBSD_ATF_TESTS_C+= strcmp_test NETBSD_ATF_TESTS_C+= strcpy_test NETBSD_ATF_TESTS_C+= strerror_test NETBSD_ATF_TESTS_C+= strlen_test NETBSD_ATF_TESTS_C+= strpbrk_test NETBSD_ATF_TESTS_C+= strrchr_test NETBSD_ATF_TESTS_C+= swab_test SRCS.strcmp2_test= strcmp_test.c SRCS.strerror2_test= strerror_test.c .include "../Makefile.netbsd-tests" LIBADD.memchr_test+= md LIBADD.memcpy_test+= md .include diff --git a/lib/libc/tests/string/strncmp_test.c b/lib/libc/tests/string/strncmp_test.c new file mode 100644 index 000000000000..989c58bcfedf --- /dev/null +++ b/lib/libc/tests/string/strncmp_test.c @@ -0,0 +1,165 @@ +/*- + * Copyright (c) 2023 The FreeBSD Foundation + * + * This software was developed by Robert Clausecker + * under sponsorship from the FreeBSD Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ''AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE + */ + +#include + +#include +#include +#include + +int (*volatile strncmp_fn)(const char *, const char *, size_t); + +static void +alignment_testcase(char *a, char *b, int want, size_t len) +{ + int res; + + res = strncmp_fn(a, b, len); + ATF_CHECK_MSG(want == (res > 0) - (res < 0), + "strcmp(%p \"%s\", %p \"%s\", %zu) = %d != %d", + (void *)a, a, (void *)b, b, len, res, want); +} + +static void +check_strncmp_alignments(char a[], char b[], + size_t a_off, size_t b_off, size_t len, size_t pos) +{ + char *a_str, *b_str, a_orig, b_orig; + + a[a_off] = '\0'; + b[b_off] = '\0'; + + a_str = a + a_off + 1; + b_str = b + b_off + 1; + + a_str[len] = '\0'; + b_str[len] = '\0'; + a_str[len+1] = 'A'; + b_str[len+1] = 'B'; + + a_orig = a_str[pos]; + b_orig = b_str[pos]; + + alignment_testcase(a_str, b_str, 0, len + 16); + alignment_testcase(a_str, b_str, 0, len + 1); + alignment_testcase(a_str, b_str, 0, len); + + if (pos < len) { + a_str[pos] = '\0'; + alignment_testcase(a_str, b_str, -1, len + 16); + alignment_testcase(a_str, b_str, -1, len + 1); + alignment_testcase(a_str, b_str, -1, len); + alignment_testcase(a_str, b_str, -1, pos + 1); + alignment_testcase(a_str, b_str, 0, pos); + a_str[pos] = a_orig; + + b_str[pos] = '\0'; + alignment_testcase(a_str, b_str, 1, len + 16); + alignment_testcase(a_str, b_str, 1, len + 1); + alignment_testcase(a_str, b_str, 1, len); + alignment_testcase(a_str, b_str, 1, pos + 1); + alignment_testcase(a_str, b_str, 0, pos); + b_str[pos] = b_orig; + } + + a_str[pos] = 'X'; + alignment_testcase(a_str, b_str, 1, len + 16); + alignment_testcase(a_str, b_str, 0, pos); + alignment_testcase(a_str, b_str, 1, pos + 1); + if (pos < len) { + alignment_testcase(a_str, b_str, 1, len); + alignment_testcase(a_str, b_str, 1, len + 1); + } + a_str[pos] = a_orig; + + b_str[pos] = 'X'; + alignment_testcase(a_str, b_str, -1, len + 16); + alignment_testcase(a_str, b_str, 0, pos); + alignment_testcase(a_str, b_str, -1, pos + 1); + if (pos < len) { + alignment_testcase(a_str, b_str, -1, len); + alignment_testcase(a_str, b_str, -1, len + 1); + } + b_str[pos] = b_orig; + + a[a_off] = '-'; + b[b_off] = '-'; + a_str[len] = '-'; + b_str[len] = '-'; + a_str[len+1] = '-'; + b_str[len+1] = '-'; +} + +ATF_TC(strncmp_alignments); +ATF_TC_HEAD(strncmp_alignments, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test strncmp(3) with various alignments"); +} + +ATF_TC_BODY(strncmp_alignments, tc) +{ + size_t a_off, b_off, len, pos; + char a[64+16+16+3], b[64+16+16+3]; + + memset(a, '-', sizeof(a)); + memset(b, '-', sizeof(b)); + a[sizeof(a) - 1] = '\0'; + b[sizeof(b) - 1] = '\0'; + + for (a_off = 0; a_off < 16; a_off++) + for (b_off = 0; b_off < 16; b_off++) + for (len = 1; len <= 64; len++) + for (pos = 0; pos <= len; pos++) + check_strncmp_alignments(a, b, a_off, b_off, len, pos); +} + +ATF_TC(strncmp_null); +ATF_TC_HEAD(strncmp_null, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test strncmp(3) with null pointers"); +} + +ATF_TC_BODY(strncmp_null, tc) +{ + alignment_testcase(NULL, NULL, 0, 0); +} + +ATF_TP_ADD_TCS(tp) +{ + void *dl_handle; + + dl_handle = dlopen(NULL, RTLD_LAZY); + strncmp_fn = dlsym(dl_handle, "test_strncmp"); + if (strncmp_fn == NULL) + strncmp_fn = strncmp; + + ATF_TP_ADD_TC(tp, strncmp_alignments); + ATF_TP_ADD_TC(tp, strncmp_null); + + return atf_no_error(); +}