Re: Level to do such a modification...

["吴曦" <wu dot andrew dot xi at gmail dot com>]

I know valgrind, it is an emulator ,but we are restricted not to use
an emulator. :-(

2007/1/24, Nicholas Nethercote <njn@csse.unimelb.edu.au>:
> On Wed, 24 Jan 2007, [GB2312] ÎâêØ wrote:
>
> > I am working on gcc 4.0.0. I want to use gcc to intercept each call to
> > read, and taint the data readed in. For example:
> > transform
> >       read(fd, buf, size)
> > to
> >       read(fd, buf, size)
> >       if(is_socket(fd))
> >               taint(buf, size)
> > So, what is the best suitable level to do this modification in gcc? My
> > own thought is in finish_function, before calling c_genericize,as I
> > discovered that in c front-end, there's no GENERIC tree... In
> > c_genericize, it directly calls gimplify_function_tree.
>
> Are you sure you want to do this in GCC?  You might find it easier to use a
> dynamic binary instrumentation framework such as Valgrind or Pin to do this
> kind of thing.
>
> Nick