* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
@ 2012-04-04 13:40 ` bugzilla-daemon
2012-04-04 18:06 ` bugzilla-daemon
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From: bugzilla-daemon @ 2012-04-04 13:40 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=48305
--- Comment #2 from myxol <myxolmyxmyx@yopmail.com> 2012-04-04 13:40:19 UTC ---
Created attachment 59491
--> https://bugs.freedesktop.org/attachment.cgi?id=59491
gdb output and xorg.log
gdb didn't produce any good backtrace. Could it be because llpp written in
ocaml?
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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Alex Deucher <agd5f@yahoo.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|Drivers/DRI/R600 |Drivers/Gallium/r600
--- Comment #1 from Alex Deucher <agd5f@yahoo.com> 2012-04-04 11:06:35 PDT ---
Can you get a proper backtrace with gdb? Can you also include your xorg log
and dmesg output?
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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--- Comment #3 from myxol <myxolmyxmyx@yopmail.com> 2012-04-04 13:42:36 PDT ---
Created attachment 59492
--> https://bugs.freedesktop.org/attachment.cgi?id=59492
dmesg output
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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--- Comment #4 from Alex Deucher <agd5f@yahoo.com> 2012-04-04 13:45:21 PDT ---
Make sure you install the debugging symbols for the 3D driver/mesa. Most
distros package these separately. Then when you hit the crash type "bt" in gdb
to get the backtrace.
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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From: bugzilla-daemon @ 2012-04-05 6:48 UTC (permalink / raw)
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--- Comment #6 from Michel Dänzer <michel@daenzer.net> 2012-04-05 06:48:04 UTC ---
(In reply to comment #5)
> After playing with compilation flags to get meaningful backtrace I found that
> this segfault happens only with -O3… Dunno if this is considered as a bug.
It's a bug *somewhere*, but it looks like it could be in the compiler... Maybe
you can try isolating which specific option implied by -O3 but not by -O2 makes
the difference.
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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--- Comment #5 from myxol <myxolmyxmyx@yopmail.com> 2012-04-05 05:54:49 PDT ---
Created attachment 59519
--> https://bugs.freedesktop.org/attachment.cgi?id=59519
mesa backtrace
After playing with compilation flags to get meaningful backtrace I found that
this segfault happens only with -O3… Dunno if this is considered as a bug.
Anyway, bt full attached. Mesa compiled with "-march=native -O3 -ggdb -pipe".
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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--- Comment #7 from myxol <myxol@lavabit.com> 2012-04-05 17:49:05 PDT ---
> Maybe you can try isolating which specific option implied by -O3 but not by -O2 makes the difference.
I tried. It is -ftree-vectorize
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=48305
--- Comment #8 from Michel Dänzer <michel@daenzer.net> 2012-04-06 04:11:52 PDT ---
Smells more like a compiler bug then. Which version of gcc is this? Does it
also happen with an older one?
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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From: bugzilla-daemon @ 2012-04-07 14:28 UTC (permalink / raw)
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--- Comment #9 from myxol <myxol@lavabit.com> 2012-04-07 07:28:42 PDT ---
I tried 3 gcc versions.
Flags: -march=native -O2 -ftree-vectorize -ggdb -pipe
4.4.7 - build fails
4.5.3 - original bugreport
4.6.2 - same problem as with 4.5.3
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 48305] llpp gets segfault in r600g_dri.so
2012-04-04 17:33 [Bug 48305] New: llpp gets segfault in r600g_dri.so bugzilla-daemon
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[-- Attachment #1.1: Type: text/plain, Size: 841 bytes --]
https://bugs.freedesktop.org/show_bug.cgi?id=48305
GitLab Migration User <gitlab-migration@fdo.invalid> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |MOVED
--- Comment #10 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --
This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.
You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/407.
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