[cfe-commits] [Patch] -Wformat: warn about using length modifiers with %n
Ted Kremenek
kremenek at apple.com
Thu Aug 2 10:43:21 PDT 2012
For example:
ll (ell-ell): Specifies that a following d, i, o, u, x, or X conversion specifier applies to a long long int or unsigned long long int argument; or that a following n conversion specifier applies to a pointer to a long long int argument.
On Aug 2, 2012, at 10:31 AM, Ted Kremenek <kremenek at apple.com> wrote:
> C99 says you can use %n with the length modifiers 'hh', 'h', 'l', 'j', 'z', and 't'.
>
> On Aug 1, 2012, at 6:43 AM, Hans Wennborg <hans at chromium.org> wrote:
>
>> Hi all,
>>
>> As far as I know, using any length modifier with %n is undefined
>> behavior. For some reason, Clang doesn't think so, but that's probably
>> unintentional? The attached patch makes Clang warn about it.
>>
>> Please take a look.
>>
>> Thanks,
>> Hans
>> <wformat_n_length_modifiers.patch>_______________________________________________
>> cfe-commits mailing list
>> cfe-commits at cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
>
More information about the cfe-commits
mailing list