[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92944

Nicolai H�hnle  changed:

   What|Removed |Added

 Resolution|--- |FIXED
 Status|NEW |RESOLVED

--- Comment #14 from Nicolai H�hnle  ---
Indeed, the offending shaders no longer crash. Not sure which of the recent
LLVM changes is responsible, let's just be happy it works :)

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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https://bugs.freedesktop.org/show_bug.cgi?id=92944

--- Comment #13 from Ernst Sj�strand  ---
Couldn't reproduce this today. Could set shaders to very high, change graphics
settings on the fly (though slow), run multiple matches in a row etc...
Latest padoka-ppa + drm-next-4.6-wip kernel.

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92944

Ernst Sjöstrand  changed:

   What|Removed |Added

 Blocks||77449

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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Tobias Droste  changed:

   What|Removed |Added

   See Also||https://bugs.freedesktop.or
   ||g/show_bug.cgi?id=93360

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92944

--- Comment #12 from Tobias Droste  ---
Okaaay... sorry for the noise, I don't have the _same_ problem.

My problem is not due to a change in either mesa or llvm but cs go as it seems.
I switched to a llvm r251632 (October 29th) and mesa
c6b24448b578c4a8ab031923df3ef1e2d865d5bb (also October 29th) and my problems is
still there.

I'm opening a new bug.

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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--- Comment #11 from Tobias Droste  ---
The change in LLVM happend somewhere between November 9th (known good) and
yesterday (known bad).

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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--- Comment #10 from Tobias Droste  ---
It's not a mesa change that caused this. 

I have the same problem with Hawaii. The first time I saw this I tried an older
version of mesa which worked a day before and the problem was still there.

I can't say which change in llvm caused this, because I'm only building mesa on
my own and receive a prebuilt llvm copy from a repository.

I can upload a backtrace as well if you want, but the segfault I see also
happens in SlotIndex::getIndex().

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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--- Comment #9 from Michel Dänzer  ---
(In reply to Bogar Boris from comment #7)
> So i tried to compiled an old revision of mesa but around that date i found
> that the mesa fail to configure/compile because of some new virgl driver.

Can't you just disable the virgl driver build? If that doesn't work either,
please attach the failure output from configure / make.

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--- Comment #8 from Ernst Sjöstrand  ---
With my current git snapshots of everything I can actually load a game and play
one round if I set shader detail to Low, everything else can be set to max it
seems.
However it crashes a bit later when loading the next round. Haven't captured
the tracebacks from that yet...

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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--- Comment #7 from Bogar Boris  ---
(In reply to Michel Dänzer from comment #6)
> (In reply to Bogar Boris from comment #1)
> > I got the same trouble on arch with mesa-git and llvm-svn. Working fine with
> > the stable release.
> 
> Can you first isolate whether the crash was introduced by a change in Mesa
> or LLVM, and then bisect that component?

I tried but i can't. I looked on my package manager log and i see that i
discover the bug around 2015/10/09. So i tried to compiled an old revision of
mesa but around that date i found that the mesa fail to configure/compile
because of some new virgl driver. And the compilation fail for an huge gap of
commit, so, finding out this is beyond my knowledge.

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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https://bugs.freedesktop.org/show_bug.cgi?id=92944

--- Comment #6 from Michel Dänzer  ---
(In reply to Bogar Boris from comment #1)
> I got the same trouble on arch with mesa-git and llvm-svn. Working fine with
> the stable release.

Can you first isolate whether the crash was introduced by a change in Mesa or
LLVM, and then bisect that component?

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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Michel Dänzer  changed:

   What|Removed |Added

 CC||arsenm2 at gmail.com,
   ||nhaehnle at gmail.com,
   ||tstellar at gmail.com

--- Comment #5 from Michel Dänzer  ---
Doesn't look related to bug 92709. I was able to reproduce the crash with llc
and the LLVM IR from the attached debugging output. Tom/Matt/Nicolai could any
of you take a look?

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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https://bugs.freedesktop.org/show_bug.cgi?id=92944

--- Comment #4 from Bogar Boris  ---
Created attachment 120065
  --> https://bugs.freedesktop.org/attachment.cgi?id=120065&action=edit
cs_go console log with R600_DEBUG=vs,gs,ps with patched LLVM-git and mesa-svn

Hi, i tried to recompile llvm-git and mesa-svn including both the patch that i
found in  Michel Dänzer message. The attachment contain the last two mesa debug
dump from the console. Honestly I don't know if you need the full log from the
game start to the crash, but the full log is over 3Mb. I hope this can help,
and this is the dmesg generated from the crash.

[nov23 19:01] csgo_linux[8027]: segfault at c ip f17cb7ed sp
d3d56a0c error 4 in libLLVM-3.8svn.so[f11b6000+29d3000]

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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--- Comment #3 from Ernst Sjöstrand  ---
Created attachment 119989
  --> https://bugs.freedesktop.org/attachment.cgi?id=119989&action=edit
cs-go-llvm.txt

Oh, haven't tried the patch yet. Here's the log with R600_DEBUG=vs,gs,ps
anyway.

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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--- Comment #2 from Michel Dänzer  ---
Might be a duplicate of bug 92709.

If http://lists.freedesktop.org/archives/mesa-dev/2015-November/100742.html
doesn't help, please run the game with the environment variable
R600_DEBUG=vs,gs,ps and attach its stderr output.

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--- Comment #1 from Bogar Boris  ---
I got the same trouble on arch with mesa-git and llvm-svn. Working fine with
the stable release.

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[Bug 92944] [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm

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https://bugs.freedesktop.org/show_bug.cgi?id=92944

Bug ID: 92944
   Summary: [Fiji/LLVM/RadeonSI] CS:GO segfaults in llvm
   Product: Mesa
   Version: git
  Hardware: Other
OS: All
Status: NEW
  Severity: normal
  Priority: medium
 Component: Drivers/Gallium/radeonsi
  Assignee: dri-devel at lists.freedesktop.org
  Reporter: ernstp at gmail.com
QA Contact: dri-devel at lists.freedesktop.org

Created attachment 119654
  --> https://bugs.freedesktop.org/attachment.cgi?id=119654&action=edit
backtrace

Every time CS:GO has finished loading a level and is about to draw 3D graphics
it crashes with this error before any 3D graphics is displayed.
Attaching the backtrace.

Hardware:
Radeon Fury
Intel 2500k

Software:
64-bit Ubuntu 15.10
LLVM 3.8~svn252698-0~padoka0
Mesa 11.1~git151113012700.2de2e17~padoka0
Linux both 4.3.0 and agd5f/powerplay tested

Other games work fine, Borderlands, Civ 5, Shadow of Mordor, Metro: Last Light
(old version).

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