| commit | 52b2e7085f09bf7834b41f6e807aff5ac97bd3a5 | [log] [tgz] |
|---|---|---|
| author | Benjamin Kramer <benny.kra@googlemail.com> | Fri Mar 29 21:43:21 2013 +0000 |
| committer | Benjamin Kramer <benny.kra@googlemail.com> | Fri Mar 29 21:43:21 2013 +0000 |
| tree | c9d811aec773665c8096a45f211851ed03c62441 | |
| parent | 9b97adfb770c3b55c1a45049d53b624bbc6f62e1 [diff] |
Sema: Warn on sizeof on binary ops on decayed arrays. The array will decay into a pointer, creating an unexpected result. sizeof(array + int) is an easy to make typo for sizeof(array) + int. This was motivated by a NetBSD security bug, used sizeof(key - r) instead of sizeof(key) - r, reducing entropy in a random number generator. http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/kern/subr_cprng.c.diff?r1=1.14&r2=1.15&only_with_tag=MAIN&f=h Differential Revision: http://llvm-reviews.chandlerc.com/D571 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178371 91177308-0d34-0410-b5e6-96231b3b80d8