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

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bugzilla-daemon＠freedesktop.org

6 Jun 2013 6 Jun '13

1:51 a.m.

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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bugzilla-daemon＠freedesktop.org

6 Jun 6 Jun

1:51 a.m.

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

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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bugzilla-daemon＠freedesktop.org

10:03 a.m.

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

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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bugzilla-daemon＠freedesktop.org

3:13 p.m.

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

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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bugzilla-daemon＠freedesktop.org

7 Jun 7 Jun

10:21 a.m.

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

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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bugzilla-daemon＠freedesktop.org

8 Jun 8 Jun

1:01 p.m.

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

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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bugzilla-daemon＠freedesktop.org

11:49 p.m.

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

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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bugzilla-daemon＠freedesktop.org

11:52 p.m.

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

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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bugzilla-daemon＠freedesktop.org

9 Jun 9 Jun

12:12 a.m.

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

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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bugzilla-daemon＠freedesktop.org

2:53 p.m.

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

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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bugzilla-daemon＠freedesktop.org

10 Jun 10 Jun

4:42 p.m.

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

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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