[PATCH v2] libio: use PTR_MANGLE/PTR_DEMANGLE for FILE vtables

[Joseph Myers]

On Thu, 1 Oct 2015, Kees Cook wrote:

> On Thu, Oct 1, 2015 at 2:00 PM, Joseph Myers <joseph@codesourcery.com> wrote:
> > On Thu, 1 Oct 2015, Florian Weimer wrote:
> >
> >> Even better, if we can grab a few old binaries and they do not run on
> >> current systems for other libstdc++-related reasons (or perhaps we
> >
> > The libstdc++ SONAME changed in GCC 3.4, so any relevant binaries will be
> > using an old libstdc++ shared library (or possibly statically linked with
> > libstdc++ but dynamically linked with libc).
> 
> So system without ancient static binaries and no libstdc++-v3 or
> earlier should be safe for this change? When did v4 happen? Seems like
> a long time ago?

It's still libstdc++-v3 even though it's gone through multiple SONAMEs 
(it's been v3 since GCC 3.0).  The question is libstdc++.so.5 or older - 
or dynamically linked binaries from compilers of that vintage with 
libstdc++.a linked in.

-- 
Joseph S. Myers
joseph@codesourcery.com