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Re: Bug#413787: libc0.3: TLS patch

From: Samuel Thibault
Subject: Re: Bug#413787: libc0.3: TLS patch
Date: Wed, 7 Mar 2007 10:51:21 +0100
User-agent: Mutt/1.5.11


Thomas Schwinge, le Wed 07 Mar 2007 10:32:00 +0100, a écrit :
> On Wed, Mar 07, 2007 at 03:06:22AM +0100, Samuel Thibault wrote:
> > Thanks to Barry's long glibc builds, here is at last a patch that builds
> > a tls/__thread -enabled and working glibc.
> Great!

BTW, by "working", I mean that simple programs do work, event with
__thread variables.

> Can you comment on the issues mentioned at
> <http://savannah.gnu.org/bugs/?17644#comment2>?

Mmm, which issues?

About the glibc-Mach interface, I don't really have any opinion ;
I would just remind that glibc-linux interface uses a generic
set_thread_area() syscall and a newtls parameter to the clone syscall,
but the passed structure is very arch-specific anyway.

About --without-__thread, it seems to work already (it got debugged on
Linux in the meanwhile).

> > The attached patch may be applied as soon as now, but do _not_ drop
> > --without-tls and --without-__thread yet, because hurd's libpthread.so
> > doesn't initialize TLS yet, and hence that would break all multithreaded
> > applications. I'm now working on the Hurd part, I'll mail the bug when
> > it is uploaded.
> Here is what Roland once wrote:
> <http://lists.gnu.org/archive/html/hurd-devel/2003-02/msg00001.html>.

Ah, thanks for digging out this, that'll be helpful.


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