[Bug 65438] New: GTK apps crash X11 since last update of LLVMM

[Bug 65438] New: GTK apps crash X11 since last update of LLVMM

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

          Priority: medium
            Bug ID: 65438
          Assignee: dri-devel@lists.freedesktop.org
           Summary: GTK apps crash X11 since last update of LLVMM
          Severity: blocker
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jrch2k10@gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

Created attachment 80375
  --> https://bugs.freedesktop.org/attachment.cgi?id=80375&action=edit
crash report

firefox / google-chrome or any other GTK2 app crash X11 inmediately since last
checkout of llvm svn


01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape
Verde XT [Radeon HD 7770 GHz Edition]

OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD CAPE VERDE
OpenGL version string: 2.1 Mesa 9.2.0 (git-ce67fb4)
OpenGL shading language version string: 1.30

attached log of the crash

i got this other bug https://bugzilla.kernel.org/show_bug.cgi?id=58621 not sure
if related

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

Rafael Castillo <jrch2k10@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|medium                      |highest

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
I can't reproduce this. Make sure your LLVM and Mesa snapshots are both up to
date and built consistently.

If that doesn't help, can you isolate which LLVM change introduced the problem
for you? The Git mirror at http://llvm.org/git/llvm.git might be useful for
that.

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #2 from Rafael Castillo <jrch2k10@gmail.com> ---
well im sure everything is latest bit, i even did an emerge -C to the entire
graphical stack [xserver mesa llvm clang libclc cairo libx11 xcb glamor gtk+]
en re emerge with defaults cflags and the same things Qt4 works perfectly but
gtk apps crash X[i guess is cairo related]. so im sure is not software related
and since my 7770 can't reclock either i guess i got the short straw with this
brand.

so can you provide me some help to do what you ask in gentoo? or howto debug
the gpu properly? since gdb/valgrind/etc dont do anything against llvm[i guess
is cuz is getting loaded by mesa and the output goes to the gpu]

im using FireBurn overlay

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
(In reply to comment #2)
> so can you provide me some help to do what you ask in gentoo?

I'm not familiar with Gentoo, but I'm sure there are many tutorials on Git
bisect on the 'net, there might even be one specific to Gentoo.


> or howto debug the gpu properly? since gdb/valgrind/etc dont do anything
> against llvm[i guess is cuz is getting loaded by mesa and the output goes to
> the gpu]

It should work just like for any other X server crash, see
http://wiki.x.org/wiki/Development/Documentation/ServerDebugging .

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #4 from hadack@gmx.de ---
I have the same problem on a 7750 CAPE VERDE card.

When starting a xfce session X craches with the error message from above,
starting kde works fine.

bisecting shows this bad commit:

8a72c73032707c7b3c042b716286a1ac33720991 is the first bad commit
commit 8a72c73032707c7b3c042b716286a1ac33720991
Author: Tom Stellard <thomas.stellard@amd.com>
Date:   Mon Jun 3 17:39:46 2013 +0000

    R600/SI: Fixup CopyToReg register class in PostprocessISelDAG()

    The CopyToReg nodes will sometimes try to copy a value from a VGPR to an
    SGPR.  This kind of copy is not possible, so we need to detect
    VGPR->SGPR copies and do something else.  The current strategy is to
    replace these copies with VGPR->VGPR copies and hope that all the users
    of CopyToReg can accept VGPRs as arguments.

    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183132
91177308-0d34-0410-b5e6-96231b3b80d8

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #5 from Rafael Castillo <jrch2k10@gmail.com> ---
i confirm that commit 8a72c73032707c7b3c042b716286a1ac33720991
seems the culprit

btw hadack and michael many thanks for you help

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #6 from Rafael Castillo <jrch2k10@gmail.com> ---
btw hadack your 7750 can reclock? i mean profile mid/high or dynpm, in case it
crashes the kernel like mine i made this bug report 
https://bugzilla.kernel.org/show_bug.cgi?id=58621

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #7 from Tom Stellard <tstellar@gmail.com> ---
Can you set the environment variable RADEON_DUMP_SHADERS=1 and re-post the
output you get when starting xfce?

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #8 from hadack@gmx.de ---
Created attachment 80567
  --> https://bugs.freedesktop.org/attachment.cgi?id=80567&action=edit
xfce with RADEON_DUMP_SHADERS=1

heres the output with RADEON_DUMP_SHADERS

Rafael: I can reclock the card, but i have to go first to low and than i can
set high, else it locks up. After boot it is in a strange state with
clocks/voltage combination that no profile sets.

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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[-- Attachment #1.1: Type: text/plain, Size: 536 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #9 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 80630
  --> https://bugs.freedesktop.org/attachment.cgi?id=80630&action=edit
Possible Fix / Work Around

Can you try this patch?  It should fix the segfault, but it looks to me like
the real bug might be in the CFG Structurizer.  There are a number of PHI nodes
that take undef as an argument, and I'm not sure if that is correct.

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #10 from hadack@gmx.de ---
Yes, with your patch xfce starts fine.
Do you need more info to find the real issue?

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #11 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #10)
> Yes, with your patch xfce starts fine.
> Do you need more info to find the real issue?

No, I think we have enough.

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #12 from Michel Dänzer <michel@daenzer.net> ---
Tom committed his fix as revision 183937.

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[Bug 65438] GTK apps crash X11 since last update of LLVMM

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https://bugs.freedesktop.org/show_bug.cgi?id=65438

--- Comment #13 from Rafael Castillo <jrch2k10@gmail.com> ---
many thanks for the help very appreciated

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