r218063 - Patch to check at compile time for overflow when

[Nico Weber]

On Thu, Sep 18, 2014 at 11:38 AM, jahanian <fjahanian at apple.com> wrote:

>
> On Sep 18, 2014, at 11:33 AM, Reid Kleckner <rnk at google.com> wrote:
>
> > Cool! Do these warnings fire on plain memcpy if the system headers don't
> arrange for memcpy to route to __builtin__memcpy_chk? If so, can you add
> tests for plain prototyped memcpy as you did for strlcpy in the previous
> test?
> >
>
> No they don’t. Note that __builtin__memcpy_chk, etc. will have an added
> argument,  __builtin_object_size,  which will have
> the size of destination buffer and is needed to do the checking.
>

But you can just call the code that does the computation that
__builtin_object_size does when checking memcpy, right?


>
> - Fariborz
>
>
>
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