diff options
Diffstat (limited to 'string/test-strncpy.c')
| -rw-r--r-- | string/test-strncpy.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/string/test-strncpy.c b/string/test-strncpy.c index c978753ad8..e902c1764e 100644 --- a/string/test-strncpy.c +++ b/string/test-strncpy.c @@ -156,6 +156,40 @@ do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char) } static void +do_page_tests (void) +{ + CHAR *s1, *s2; + const size_t maxoffset = 64; + + /* Put s1 at the maxoffset from the edge of buf1's last page. */ + s1 = (CHAR *) buf1 + BUF1PAGES * page_size / sizeof(CHAR) - maxoffset; + /* s2 needs room to put a string with size of maxoffset + 1 at s2 + + (maxoffset - 1). */ + s2 = (CHAR *) buf2 + page_size / sizeof(CHAR) - maxoffset * 2; + + MEMSET (s1, 'a', maxoffset - 1); + s1[maxoffset - 1] = '\0'; + + /* 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 copies the string s1 for all possible offsets up to maxoffset + for both inputs with a size larger than s1 (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++) + { + FOR_EACH_IMPL (impl, 0) + do_one_test (impl, s2 + off2, s1 + off1, maxoffset - off1 - 1, + maxoffset + (maxoffset - off2)); + } + } +} + +static void do_random_tests (void) { size_t i, j, n, align1, align2, len, size, mode; @@ -317,6 +351,7 @@ test_main (void) } do_random_tests (); + do_page_tests (); return ret; } |