On Sep 18, 2014, at 1:03 PM, Nico Weber <[email protected]> wrote:
> On Thu, Sep 18, 2014 at 11:38 AM, jahanian <[email protected]> wrote: > > On Sep 18, 2014, at 11:33 AM, Reid Kleckner <[email protected]> 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? I am not sure what you mean. memcpy does not do any checking for overflow. You may do the checking for overflow before calling memcpy yourself (essentially do what __builtin_memcpy_chk does). - Fariborz > > > - Fariborz > > > > _______________________________________________ > cfe-commits mailing list > [email protected] > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits >
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