Re: [Valgrind-users] RH9 and valgrind (vgPlain_do_useseg assertion fail)

[Tom H. <th...@cy...>]

In message <Pin...@ye...>
          Nicholas Nethercote <nj...@ca...> wrote:

> Jeff Johnson of Red Hat wrote a patch for this and sent it to me a month
> ago.  The patch is 6,841 lines long... so maybe it's harder than you'd
> expect.  The patch did some stuff with the debuginfo package too, I don't
> know how much of it was for that.

Well the immediate cause of that failure appears to be the use of
the GDT instead of the LDT to hold thread local data, and I believe
that should be easy to fix - it just needs the set_thread_area system
call to be handled in the same way that modify_ldt currently is, and
future GDT based references to be resolved via the current thread's
local data area as set with the set_thread_area call.

Of course there may be other NPTL related issues that would appear
once that was fixed.

Tom

-- 
Tom Hughes (th...@cy...)
Software Engineer, Cyberscience Corporation
http://www.cyberscience.com/