* [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash
2016-07-06 23:05 [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash bugzilla-daemon
@ 2016-07-07 0:43 ` bugzilla-daemon
2016-07-07 7:17 ` bugzilla-daemon
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To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=96835
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |chuck.atkins@kitware.com
--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
Please attach a gdb backtrace of a crash.
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash
2016-07-06 23:05 [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash bugzilla-daemon
2016-07-07 0:43 ` bugzilla-daemon
@ 2016-07-07 7:17 ` bugzilla-daemon
2016-07-07 13:17 ` bugzilla-daemon
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From: bugzilla-daemon @ 2016-07-07 7:17 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=96835
--- Comment #2 from raffarti@zoho.com ---
Created attachment 124940
--> https://bugs.freedesktop.org/attachment.cgi?id=124940&action=edit
steam gdb backtrace
Steam crashes (it's 32 bit)
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash
2016-07-06 23:05 [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash bugzilla-daemon
2016-07-07 0:43 ` bugzilla-daemon
2016-07-07 7:17 ` bugzilla-daemon
@ 2016-07-07 13:17 ` bugzilla-daemon
2016-07-07 16:37 ` bugzilla-daemon
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From: bugzilla-daemon @ 2016-07-07 13:17 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=96835
--- Comment #3 from Nicolai Hähnle <nhaehnle@gmail.com> ---
The backtrace looks completely unrelated to the commit you cite. Why do you
think that this particular commit is at fault?
Just to be sure, could you please provide a backtrace with debug symbols
enabled (-g)?
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash
2016-07-06 23:05 [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash bugzilla-daemon
` (2 preceding siblings ...)
2016-07-07 13:17 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=96835
--- Comment #4 from raffarti@zoho.com ---
The previous commit does just fine, this one does not.
I've found the traces to be different with and without the gallium hud, so I'm
attaching both traces.
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash
2016-07-06 23:05 [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash bugzilla-daemon
` (3 preceding siblings ...)
2016-07-07 16:37 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=96835
--- Comment #5 from raffarti@zoho.com ---
Created attachment 124947
--> https://bugs.freedesktop.org/attachment.cgi?id=124947&action=edit
steam gdb stack trace with gallium hud and mesa debug
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash
2016-07-06 23:05 [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash bugzilla-daemon
` (4 preceding siblings ...)
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@ 2016-07-07 16:38 ` bugzilla-daemon
2016-07-08 3:11 ` bugzilla-daemon
2016-07-08 9:13 ` bugzilla-daemon
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2016-07-07 16:38 UTC (permalink / raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=96835
--- Comment #6 from raffarti@zoho.com ---
Created attachment 124948
--> https://bugs.freedesktop.org/attachment.cgi?id=124948&action=edit
steam gdb stack trace without gallium hud and mesa debug
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash
2016-07-06 23:05 [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash bugzilla-daemon
` (5 preceding siblings ...)
2016-07-07 16:38 ` bugzilla-daemon
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From: bugzilla-daemon @ 2016-07-08 3:11 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=96835
--- Comment #7 from Roland Scheidegger <sroland@vmware.com> ---
On second look, I am actually wondering if that commit really is doing the
right thing. Shouldn't we try to set the alignment on the struct itself
instead? And regardless, if someone uses an ordinary malloc for it it's not
going to be aligned anyway (meaning if it's passed to drivers somewhere and the
called functions are relying on this to be aligned they might be in for some
surprise).
(That said I have no idea if this is really related to this bug.)
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash
2016-07-06 23:05 [Bug 96835] "gallium: Force blend color to 16-byte alignment" crash with "-march=native -O3" causes some 32bit games to crash bugzilla-daemon
` (6 preceding siblings ...)
2016-07-08 3:11 ` bugzilla-daemon
@ 2016-07-08 9:13 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=96835
Nicolai Hähnle <nhaehnle@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
QA Contact|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
|.org |org
Component|Drivers/Gallium/radeonsi |Mesa core
Assignee|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
|.org |org
--- Comment #8 from Nicolai Hähnle <nhaehnle@gmail.com> ---
(The Gallium HUD crash is "benign": you enabled more graphs than there are
pre-defined colors. Annoying, but unrelated to the problem at hand.)
My understanding is that malloc should return pointers with the largest
alignment requirement possible for the size that it allocates. Although,
perhaps that's less than 16 bytes on 32 bits?
Actually, I think that's it: the backtrace shows ctx=0x569cbfc8, i.e. ctx is
only 8-byte aligned even though it contains a pipe_blend_color structure.
Moving to Mesa core since it's not really radeonsi-specific.
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