From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 34495] Selecting objects in Blender 2.56 slow with gallium r600
	driver
Date: Fri, 17 Jun 2011 12:50:42 -0700 (PDT)
Message-ID: <20110617195043.0B47F13004F@annarchy.freedesktop.org>
References: <bug-34495-502@http.bugs.freedesktop.org/>
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https://bugs.freedesktop.org/show_bug.cgi?id=34495

--- Comment #7 from Lars G <terraformers@gmail.com> 2011-06-17 12:50:42 PDT ---
(In reply to comment #5)

thanks for testing Pierre-Eric!

> I can reproduce the crash as well.
> - with LIBGL_ALWAYS_SOFTWARE=1 => no crash
Same here.

after installing all needed debuginfos, running in gdb i get:
...
Reading symbols from /usr/bin/blender...Reading symbols from
/usr/lib/debug/usr/bin/blender.debug...done.
...
Starting program: /usr/bin/blender 
[Thread debugging using libthread_db enabled]
warning: "/usr/lib/debug/usr/lib64/dri/libllvmcore-2.8.so.debug": separate
debug info file has no debug info
...
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff4e40814 in ?? ()
(gdb) whe
#0  0x00007ffff4e40814 in ?? ()
#1  0x0000000000000dd0 in ?? ()
#2  0x0000f83400000007 in ?? ()
#3  0x000007be00000800 in ?? ()
#4  0x0000000001f12ac0 in ?? ()
#5  0x0000000000000007 in ?? ()
#6  0x00007ffffffd5e40 in ?? ()
#7  0x0000000000000000 in ?? ()

so i think there is another bug in fedora's mesa-debuginfo package not
providing the right info in
libllvmcore-2.8.so.debug
(i filed this mesa-debuginfo bug in the redhat bugzilla.)

as i get no debug info from gdb and only the libllvmcore-2.8.so debuginfo is
missing, it looks like the same area where this bug comes from to me.


(In reply to comment #6)

> I wonder if the version of llvm have an impact (since the crash happens in draw_llvm_shader1) I'm using version 2.9.

i don't have a separate llvm package installed on my system.
looks like the crash then comes from:
http://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c#n246

but i'm not good in coding such things...
but i can help testing/debugging this.

thanks,
lars

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