/*- * 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 strcmp_fn)(const char *, const char *); ATF_TC(strcmp_alignments); ATF_TC_HEAD(strcmp_alignments, tc) { atf_tc_set_md_var(tc, "descr", "Test strcmp(3) with various alignments"); } static void alignment_testcase(char *a, char *b, int want) { int res; res = strcmp_fn(a, b); ATF_CHECK_MSG(want == (res > 0) - (res < 0), "strcmp(%p \"%s\", %p \"%s\") = %d != %d", (void *)a, a, (void *)b, b, res, want); } static void check_strcmp_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); if (pos < len) { a_str[pos] = '\0'; alignment_testcase(a_str, b_str, -1); a_str[pos] = a_orig; b_str[pos] = '\0'; alignment_testcase(a_str, b_str, 1); b_str[pos] = b_orig; } a_str[pos] = 'X'; alignment_testcase(a_str, b_str, 1); a_str[pos] = a_orig; b_str[pos] = 'X'; alignment_testcase(a_str, b_str, -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_BODY(strcmp_alignments, tc) { size_t a_off, b_off, len, pos; /* 16B alignment offset + 64B buffer + sentinel before/after + NUL */ char a[64+16+3], b[64+16+3]; memset(a, '-', sizeof(a)); memset(b, '-', sizeof(b)); a[sizeof(a) - 1] = '\0'; b[sizeof(b) - 1] = '\0'; /* check alignment offsets relevant for SSE routines */ for (a_off = 0; a_off < 16; a_off++) for (b_off = 0; b_off < 16; b_off++) /* ensure main loop (@ 32B) is completed at least once */ for (len = 1; len <= 64; len++) for (pos = 0; pos <= len; pos++) check_strcmp_alignments(a, b, a_off, b_off, len, pos); } ATF_TP_ADD_TCS(tp) { void *dl_handle; dl_handle = dlopen(NULL, RTLD_LAZY); strcmp_fn = dlsym(dl_handle, "test_strcmp"); if (strcmp_fn == NULL) strcmp_fn = strcmp; ATF_TP_ADD_TC(tp, strcmp_alignments); return atf_no_error(); }