-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 09/25/2011 10:40 AM, Richard Hipp wrote: > 100% MC/DC has worked very, very well at finding and preventing bugs in > SQLite.
The one place it doesn't help is when error returns of functions are ignored. For example this happens when xCurrentTime of a VFS has an error. The call is wrapped in sqlite3OsCurrentTimeInt64 but code calling that ignores that an error occurred. http://www.sqlite.org/src/tktview?name=0b803bff85 You can see how the internal function setDateTimeToCurrent assumes that it always succeeds. Error checking would require a conditional for the succeed and failure cases when MC/DC will then help. BTW with GCC you can mark functions with the attribute warn_unused_result which will then cause warnings should the return be ignored. Roger -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAk5/kn4ACgkQmOOfHg372QQ9yACgi30Iskv/jbBENr/8N5gp/b3Z A00AoLZm9Qy+nHKFJLyH8CqzUD8LOYj5 =6S30 -----END PGP SIGNATURE----- _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
