Debian Bug report logs - #394311
libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: ryan@tau.solarneutrino.net

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

Date: Fri, 20 Oct 2006 12:47:57 -0400

Package: libgl1-mesa-dri
Version: 6.5.1-0.2
Severity: normal

The current build contains a faulty i965_dri.so causing all GL clients
to crash and lock up the display.  This is apparently caused by a
miscompilation with gcc-4.1.  Rebuilding with gcc-3.4 fixes the problem.


-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.19-rc2
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages libgl1-mesa-dri depends on:
ii  libc6                        2.3.6.ds1-6 GNU C Library: Shared libraries
ii  libdrm2                      2.0.2-0.1   Userspace interface to kernel DRM 
ii  libexpat1                    1.95.8-3.3  XML parsing C library - runtime li
ii  libgl1-mesa-glx              6.5.1-0.2   A free implementation of the OpenG

libgl1-mesa-dri recommends no packages.

-- no debconf information

Message #10 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Michel Dänzer <daenzer@debian.org>

To: ryan@tau.solarneutrino.net, 394311@bugs.debian.org

Cc: Ben Hutchings <ben@decadent.org.uk>

Subject: Re: Bug#394311: libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

Date: Sat, 21 Oct 2006 10:18:41 +0200

On Fri, 2006-10-20 at 12:47 -0400, ryan@tau.solarneutrino.net wrote:
> Package: libgl1-mesa-dri
> Version: 6.5.1-0.2
> Severity: normal
> 
> The current build contains a faulty i965_dri.so causing all GL clients
> to crash and lock up the display.  This is apparently caused by a
> miscompilation with gcc-4.1.  Rebuilding with gcc-3.4 fixes the problem.

Ben, do you happen to know whether this was built with
-fno-strict-aliasing? If not, that might be worth a try, as the Mesa
code generally isn't strict aliasing safe.


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer

Message #15 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Ryan Richter <ryan@tau.solarneutrino.net>

To: Michel Dänzer <daenzer@debian.org>

Cc: 394311@bugs.debian.org, Ben Hutchings <ben@decadent.org.uk>

Subject: Re: Bug#394311: libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

Date: Sat, 21 Oct 2006 12:08:45 -0400

On Sat, Oct 21, 2006 at 10:18:41AM +0200, Michel Dänzer wrote:
> On Fri, 2006-10-20 at 12:47 -0400, ryan@tau.solarneutrino.net wrote:
> > Package: libgl1-mesa-dri
> > Version: 6.5.1-0.2
> > Severity: normal
> > 
> > The current build contains a faulty i965_dri.so causing all GL clients
> > to crash and lock up the display.  This is apparently caused by a
> > miscompilation with gcc-4.1.  Rebuilding with gcc-3.4 fixes the problem.
> 
> Ben, do you happen to know whether this was built with
> -fno-strict-aliasing? If not, that might be worth a try, as the Mesa
> code generally isn't strict aliasing safe.

I can't find -fno-strict-aliasing anywhere in configs/debian*, so I
don't think anything is built with that.

-ryan

Message #20 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Ben Hutchings <ben@decadent.org.uk>

To: Ryan Richter <ryan@tau.solarneutrino.net>

Cc: Michel Dänzer <daenzer@debian.org>, 394311@bugs.debian.org

Subject: Re: Bug#394311: libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

Date: Sat, 21 Oct 2006 18:52:06 +0100

[Message part 1 (text/plain, inline)]

On Sat, 2006-10-21 at 12:08 -0400, Ryan Richter wrote:
> On Sat, Oct 21, 2006 at 10:18:41AM +0200, Michel Dänzer wrote:
> > On Fri, 2006-10-20 at 12:47 -0400, ryan@tau.solarneutrino.net wrote:
> > > Package: libgl1-mesa-dri
> > > Version: 6.5.1-0.2
> > > Severity: normal
> > > 
> > > The current build contains a faulty i965_dri.so causing all GL clients
> > > to crash and lock up the display.  This is apparently caused by a
> > > miscompilation with gcc-4.1.  Rebuilding with gcc-3.4 fixes the problem.
> > 
> > Ben, do you happen to know whether this was built with
> > -fno-strict-aliasing? If not, that might be worth a try, as the Mesa
> > code generally isn't strict aliasing safe.
> 
> I can't find -fno-strict-aliasing anywhere in configs/debian*, so I
> don't think anything is built with that.

I didn't modify any of the build options, so I suppose I can't have used
-fno-strict-aliasing.  Unfortunately pbuilder doesn't log (or I have not
configured it to, if that's possible).

You had better try that because I don't have any machine with an i965 to
test on.

Ben.

-- 
Ben Hutchings -- ben@decadentplace.org.uk shortened to ben@decadent.org.uk
If you've signed my GPG key, please send a signature on and to the new uid.
In a hierarchy, every employee tends to rise to his level of incompetence.

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Message #25 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Michel Dänzer <daenzer@debian.org>

To: Ben Hutchings <ben@decadent.org.uk>

Cc: Ryan Richter <ryan@tau.solarneutrino.net>, 394311@bugs.debian.org

Subject: Re: Bug#394311: libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

Date: Sun, 22 Oct 2006 12:51:43 +0200

On Sat, 2006-10-21 at 18:52 +0100, Ben Hutchings wrote:
> On Sat, 2006-10-21 at 12:08 -0400, Ryan Richter wrote:
> > On Sat, Oct 21, 2006 at 10:18:41AM +0200, Michel Dänzer wrote:
> > > On Fri, 2006-10-20 at 12:47 -0400, ryan@tau.solarneutrino.net wrote:
> > > > Package: libgl1-mesa-dri
> > > > Version: 6.5.1-0.2
> > > > Severity: normal
> > > > 
> > > > The current build contains a faulty i965_dri.so causing all GL clients
> > > > to crash and lock up the display.  This is apparently caused by a
> > > > miscompilation with gcc-4.1.  Rebuilding with gcc-3.4 fixes the problem.
> > > 
> > > Ben, do you happen to know whether this was built with
> > > -fno-strict-aliasing? If not, that might be worth a try, as the Mesa
> > > code generally isn't strict aliasing safe.
> > 
> > I can't find -fno-strict-aliasing anywhere in configs/debian*, so I
> > don't think anything is built with that.
> 
> I didn't modify any of the build options, so I suppose I can't have used
> -fno-strict-aliasing.  Unfortunately pbuilder doesn't log (or I have not
> configured it to, if that's possible).

There's --logfile, but I usually just do

<pbuilder command line> 2>&1 | tee <logfile>

You have my sincere respect for using pbuilder in the first place
though. :)


> You had better try that because I don't have any machine with an i965 to
> test on.

Yes, please try it Ryan.


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer

Message #30 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Ryan Richter <ryan@tau.solarneutrino.net>

To: Ben Hutchings <ben@decadent.org.uk>

Cc: Michel Dänzer <daenzer@debian.org>, 394311@bugs.debian.org

Subject: Re: Bug#394311: libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

Date: Mon, 23 Oct 2006 13:47:05 -0400

On Sat, Oct 21, 2006 at 06:52:06PM +0100, Ben Hutchings wrote:
> On Sat, 2006-10-21 at 12:08 -0400, Ryan Richter wrote:
> > On Sat, Oct 21, 2006 at 10:18:41AM +0200, Michel Dänzer wrote:
> > > On Fri, 2006-10-20 at 12:47 -0400, ryan@tau.solarneutrino.net wrote:
> > > > Package: libgl1-mesa-dri
> > > > Version: 6.5.1-0.2
> > > > Severity: normal
> > > > 
> > > > The current build contains a faulty i965_dri.so causing all GL clients
> > > > to crash and lock up the display.  This is apparently caused by a
> > > > miscompilation with gcc-4.1.  Rebuilding with gcc-3.4 fixes the problem.
> > > 
> > > Ben, do you happen to know whether this was built with
> > > -fno-strict-aliasing? If not, that might be worth a try, as the Mesa
> > > code generally isn't strict aliasing safe.
> > 
> > I can't find -fno-strict-aliasing anywhere in configs/debian*, so I
> > don't think anything is built with that.
> 
> I didn't modify any of the build options, so I suppose I can't have used
> -fno-strict-aliasing.  Unfortunately pbuilder doesn't log (or I have not
> configured it to, if that's possible).
> 
> You had better try that because I don't have any machine with an i965 to
> test on.

Yep, adding -fno-strict-aliasing makes it work with gcc-4.1.

patch

diff -Naur mesa-6.5.1/configs/debian mesa-6.5.1-fnsa/configs/debian
--- mesa-6.5.1/configs/debian	2006-10-23 13:44:20.000000000 -0400
+++ mesa-6.5.1-fnsa/configs/debian	2006-10-23 13:45:14.583335930 -0400
@@ -7,9 +7,9 @@
 
 DEBIAN_COMMON_CPPFLAGS = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -D_GNU_SOURCE -DUSE_XSHM -DPTHREADS `pkg-config --cflags x11 xext`
 
-DEBIAN_COMMON_CFLAGS = -std=c99 -pedantic -Wall -fPIC
+DEBIAN_COMMON_CFLAGS = -std=c99 -pedantic -Wall -fPIC -fno-strict-aliasing
 
-DEBIAN_COMMON_CXXFLAGS = -ansi -pedantic -Wall -fPIC
+DEBIAN_COMMON_CXXFLAGS = -ansi -pedantic -Wall -fPIC -fno-strict-aliasing
 
 DEBIAN_OPT_CFLAGS = -O2
 
diff -Naur mesa-6.5.1/configs/debian-static mesa-6.5.1-fnsa/configs/debian-static
--- mesa-6.5.1/configs/debian-static	2006-10-23 13:44:20.000000000 -0400
+++ mesa-6.5.1-fnsa/configs/debian-static	2006-10-23 13:45:19.624665242 -0400
@@ -7,9 +7,9 @@
 
 DEBIAN_COMMON_CPPFLAGS = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -DUSE_XSHM -DPTHREADS -I/usr/X11R6/include
 
-DEBIAN_COMMON_CFLAGS = -std=c99 -pedantic -Wall
+DEBIAN_COMMON_CFLAGS = -std=c99 -pedantic -Wall -fno-strict-aliasing
 
-DEBIAN_COMMON_CXXFLAGS = -ansi -pedantic -Wall
+DEBIAN_COMMON_CXXFLAGS = -ansi -pedantic -Wall -fno-strict-aliasing
 
 DEBIAN_OPT_CFLAGS = -O2
 



-ryan

Message #35 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Jérémy Bobbio <jeremy.bobbio@etu.upmc.fr>

To: 394311@bugs.debian.org

Subject: Re: Bug#394311: libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

Date: Tue, 26 Dec 2006 00:22:15 +0100

[Message part 1 (text/plain, inline)]

found 6.5.1-0.4
tags 394311 + patch confirmed
thanks

I confirm that this bug still exists in mesa 6.5.1-0.4, and that the
proposed patch actually fixes it.

Could be good to have it in etch, IMHO.

Regards,
-- 
Jérémy

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Message #42 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Alan Chandler <alan@chandlerfamily.org.uk>

To: 394311@bugs.debian.org

Subject: Me too

Date: Wed, 3 Jan 2007 00:14:55 +0000

When is the patch in this bug report going to be applied?  I too have a 
Motherboard with the i965G chip on, and can't display any 3D stuff as a 
result of it.


-- 
Alan Chandler
http://www.chandlerfamily.org.uk

Message #47 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Thierry Reding <thierry@gilfi.de>

To: Alan Chandler <alan@chandlerfamily.org.uk>

Cc: 394311@bugs.debian.org

Subject: Re: Me too

Date: Wed, 3 Jan 2007 09:05:57 +0100

[Message part 1 (text/plain, inline)]

* Alan Chandler wrote:
> When is the patch in this bug report going to be applied?  I too have a 
> Motherboard with the i965G chip on, and can't display any 3D stuff as a 
> result of it.

You could try the experimental branch of the XSF git repository of mesa, like
so:

	$ git-clone http://git.debian.org/git/pkg-xorg/lib/mesa.git
	$ git-checkout experimental
	$ debuild

I don't think this will make it into etch though.

Cheers,
Thierry

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Message #52 received at 394311@bugs.debian.org (full text, mbox, reply):

From: Julien Cristau <jcristau@debian.org>

To: 394311@bugs.debian.org

Subject: mesa: diff for NMU version 6.5.1-0.5

Date: Wed, 3 Jan 2007 17:33:10 +0100

[Message part 1 (text/plain, inline)]

tags 394311 + patch
thanks

Hi,

Attached is the diff for my mesa 6.5.1-0.5 NMU.

Cheers,
Julien

[mesa-6.5.1-0.5-nmu.diff (text/x-diff, attachment)]

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Message #59 received at 394311-close@bugs.debian.org (full text, mbox, reply):

From: Julien Cristau <julien.cristau@ens-lyon.org>

To: 394311-close@bugs.debian.org

Subject: Bug#394311: fixed in mesa 6.5.1-0.5

Date: Wed, 03 Jan 2007 16:47:05 +0000

Source: mesa
Source-Version: 6.5.1-0.5

We believe that the bug you reported is fixed in the latest version of
mesa, which is due to be installed in the Debian FTP archive:

libgl1-mesa-dev_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libgl1-mesa-dev_6.5.1-0.5_i386.deb
libgl1-mesa-dri_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libgl1-mesa-dri_6.5.1-0.5_i386.deb
libgl1-mesa-glx_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libgl1-mesa-glx_6.5.1-0.5_i386.deb
libgl1-mesa-swx11-dbg_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libgl1-mesa-swx11-dbg_6.5.1-0.5_i386.deb
libgl1-mesa-swx11-dev_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libgl1-mesa-swx11-dev_6.5.1-0.5_i386.deb
libgl1-mesa-swx11_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libgl1-mesa-swx11_6.5.1-0.5_i386.deb
libglu1-mesa-dev_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libglu1-mesa-dev_6.5.1-0.5_i386.deb
libglu1-mesa_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libglu1-mesa_6.5.1-0.5_i386.deb
libosmesa6-dev_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libosmesa6-dev_6.5.1-0.5_i386.deb
libosmesa6_6.5.1-0.5_i386.deb
  to pool/main/m/mesa/libosmesa6_6.5.1-0.5_i386.deb
mesa-common-dev_6.5.1-0.5_all.deb
  to pool/main/m/mesa/mesa-common-dev_6.5.1-0.5_all.deb
mesa-swx11-source_6.5.1-0.5_all.deb
  to pool/main/m/mesa/mesa-swx11-source_6.5.1-0.5_all.deb
mesa_6.5.1-0.5.diff.gz
  to pool/main/m/mesa/mesa_6.5.1-0.5.diff.gz
mesa_6.5.1-0.5.dsc
  to pool/main/m/mesa/mesa_6.5.1-0.5.dsc



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 394311@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Julien Cristau <julien.cristau@ens-lyon.org> (supplier of updated mesa package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Wed,  3 Jan 2007 13:48:20 +0100
Source: mesa
Binary: libgl1-mesa-swx11-dev libgl1-mesa-glx libosmesa6-dev libgl1-mesa-dev libosmesa6 mesa-swx11-source libglu1-mesa-dev mesa-common-dev libglu1-mesa libgl1-mesa-dri libgl1-mesa-swx11-dbg libgl1-mesa-swx11
Architecture: source all i386
Version: 6.5.1-0.5
Distribution: unstable
Urgency: low
Maintainer: Mesa package maintainers <pkg-mesa-devel@lists.alioth.debian.org>
Changed-By: Julien Cristau <julien.cristau@ens-lyon.org>
Description: 
 libgl1-mesa-dev - A free implementation of the OpenGL API -- GLX development suppor
 libgl1-mesa-dri - A free implementation of the OpenGL API -- DRI modules
 libgl1-mesa-glx - A free implementation of the OpenGL API -- GLX runtime
 libgl1-mesa-swx11 - A free implementation of the OpenGL API -- runtime
 libgl1-mesa-swx11-dbg - A free implementation of the OpenGL API -- debugging package
 libgl1-mesa-swx11-dev - A free implementation of the OpenGL API -- development support fi
 libglu1-mesa - The OpenGL utility library (GLU)
 libglu1-mesa-dev - The OpenGL utility library -- development support files
 libosmesa6 - Mesa Off-screen rendering extension
 libosmesa6-dev - Mesa Off-screen rendering extension -- development support files
 mesa-common-dev - Developer documentation for Mesa
 mesa-swx11-source - Mesa software rasteriser source -- development support files
Closes: 394311
Changes: 
 mesa (6.5.1-0.5) unstable; urgency=low
 .
   * Non-maintainer upload.
   * Build with -fno-strict-aliasing to fix misbuild of i965_dri.so
     (closes: #394311).  Thanks to Michel Dänzer for the fix, and to Ryan
     Richter for the report and testing.
Files: 
 0e2cc6cf17b5756e815c1429507ecfee 1086 graphics optional mesa_6.5.1-0.5.dsc
 8a6819d3034aa07a94f8cf8b781e5319 467914 graphics optional mesa_6.5.1-0.5.diff.gz
 e82a85c3817045d8007538899f48d71c 158382 devel optional mesa-common-dev_6.5.1-0.5_all.deb
 e8170ea38e972bcbc4c689645ded6d63 1481126 libdevel optional mesa-swx11-source_6.5.1-0.5_all.deb
 31ce3e82de163d7c0fc5830e97327717 1880434 libs optional libgl1-mesa-swx11_6.5.1-0.5_i386.deb
 356f928b2e91e9f491cb71c3baad7fee 2220958 libdevel optional libgl1-mesa-swx11-dev_6.5.1-0.5_i386.deb
 7ba1838d9611a363b9ddf193160ec623 2036970 libs optional libgl1-mesa-swx11-dbg_6.5.1-0.5_i386.deb
 fdc0177d6c66f58f3b9de27eb5c02b0f 147718 libs optional libgl1-mesa-glx_6.5.1-0.5_i386.deb
 c2d46e9c0cb7b2c5c9ce0630da291b59 12247984 libs optional libgl1-mesa-dri_6.5.1-0.5_i386.deb
 62193335090869b8ff6e8f47e168cdd0 32262 libs optional libgl1-mesa-dev_6.5.1-0.5_i386.deb
 b4fe6a024d88e9ed6db45c5552a4f457 1526528 libs optional libosmesa6_6.5.1-0.5_i386.deb
 28122d75d28e636d23661333a7fcf371 1783458 devel optional libosmesa6-dev_6.5.1-0.5_i386.deb
 c5f895413c2725fb5cc3abd4b37a5c19 231836 libs optional libglu1-mesa_6.5.1-0.5_i386.deb
 089bfc0b1636c593e36a42e05f562488 257314 libdevel optional libglu1-mesa-dev_6.5.1-0.5_i386.deb

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