diff options
Diffstat (limited to 'string/test-strncasecmp.c')
| -rw-r--r-- | string/test-strncasecmp.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/string/test-strncasecmp.c b/string/test-strncasecmp.c index 6a9c27beae..502222ed1d 100644 --- a/string/test-strncasecmp.c +++ b/string/test-strncasecmp.c @@ -138,6 +138,48 @@ do_test (size_t align1, size_t align2, size_t n, size_t len, int max_char, } static void +do_page_tests (void) +{ + char *s1, *s2; + int exp_result; + const size_t maxoffset = 64; + + s1 = (char *) buf1 + BUF1PAGES * page_size - maxoffset; + memset (s1, 'a', maxoffset - 1); + s1[maxoffset - 1] = '\0'; + + s2 = (char *) buf2 + page_size - maxoffset; + memset (s2, 'a', maxoffset - 1); + s2[maxoffset - 1] = '\0'; + + /* At this point s1 and s2 point to distinct memory regions containing + "aa..." with size of 63 plus '\0'. Also, both strings are bounded to a + page with read/write access and the next page is protected with PROT_NONE + (meaning that any access outside of the page regions will trigger an + invalid memory access). + + The loop checks for all possible offsets up to maxoffset for both + inputs with a size larger than the string (so memory access outside + the expected memory regions might trigger invalid access). */ + + for (size_t off1 = 0; off1 < maxoffset; off1++) + { + for (size_t off2 = 0; off2 < maxoffset; off2++) + { + exp_result = (off1 == off2) + ? 0 + : off1 < off2 + ? 'a' + : -'a'; + + FOR_EACH_IMPL (impl, 0) + check_result (impl, s1 + off1, s2 + off2, maxoffset + 1, + exp_result); + } + } +} + +static void do_random_tests (void) { size_t i, j, n, align1, align2, pos, len1, len2; @@ -334,6 +376,7 @@ test_locale (const char *locale) } do_random_tests (); + do_page_tests (); } int |