ubuntu-x-swat team mailing list archive

[Nate Poell <259219@xxxxxxxxxxxxxxxxxx>]

I've confirmed that updating fixes this.  Thank you! -Nate

On Wed, Mar 16, 2011 at 5:10 AM, Andrea Carpineti
<carpineti.dev@xxxxxxxxx>wrote:

> Hi Konstantin,
> just upgrade your system. You can use the command:
> sudo apt-get update; sudo apt-get upgrade
>
> More details can be found at
> https://help.ubuntu.com/community/AptGet/Howto
> If you don't update your system from a while the libgl1-mesa-glx package
> will be updated and this bug will be fixed (thank to Chris!!! :D ).
>
> --
> You received this bug notification because you are a direct subscriber
> of a duplicate bug (734402).
> https://bugs.launchpad.net/bugs/259219
>
> Title:
>  Broken TLS support in libGL.so AKA: software-center crashed with
>  SIGSEGV in __cxa_allocate_exception()
>
> Status in “mesa” package in Ubuntu:
>  Fix Released
> Status in “software-center” package in Ubuntu:
>  Fix Released
> Status in “mesa” source package in Natty:
>  Fix Released
> Status in “software-center” source package in Natty:
>  Fix Released
>
> Bug description:
>  Binary package hint: libgl1-mesa-dri
>
>  ---
>  Software Center error description from apport is:  software-center crashed
> with SIGSEGV in __cxa_allocate_exception()
>  WORKAROUND for the software-center crash:
>
>    Launch Software Center from the command line as:
>
>       LD_PRELOAD=/usr/lib/libstdc++.so.6 software-center
>
>  For more details about the software-center crash, please see bug 731724.
>  ---
>
>  The package libgl1-mesa-dri in Intrepid seems to have been compiled with
> the option --enable-glx-tls. This triggers a bug in src/glx/x11/glxcurrent.c
> :
>  The TLS variable __glX_tls_Context is compiled with the TLS model
> initial-exec, which is only ment for executables. Used in shared libraries,
> it can break TLS usage in other shared libraries.
>  One example is when libGL is linked beforce libstdc++ in another library,
> which is then loaded via dlopen(). In this case, the TLS variables in
> libstdc++ aren't properly initialized, and it will segfault when trying to
> allocate an exception.
>  I think there are 2 possible solutions:
>  1. Do not compile with --enabgle-glx-tls
>  2. Patch mesa to remove the tls-model attribute. I assume this will eat up
> the performance gain of TLS, since initial-exec is meant as an optimisation
> for apps not using the GL over dlopen directly or indirectly.
>
>  Policy information about my libGL package:
>  libgl1-mesa-dri:
>    Installiert: 7.1~rc3-1ubuntu4
>    Kandidat: 7.1~rc3-1ubuntu4
>    Versions-Tabelle:
>   *** 7.1~rc3-1ubuntu4 0
>          500 http://de.archive.ubuntu.com intrepid/main Packages
>          100 /var/lib/dpkg/status
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/259219/+subscribe
>

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to mesa in ubuntu.
https://bugs.launchpad.net/bugs/259219

Title:
  Broken TLS support in libGL.so AKA: software-center crashed with
  SIGSEGV in __cxa_allocate_exception()