[Bug 37253] New: SIGSEGV in dri2FlushFrontBuffer/MakeContextCurrent

[Bug 37253] New: SIGSEGV in dri2FlushFrontBuffer/MakeContextCurrent

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=37253

           Summary: SIGSEGV in dri2FlushFrontBuffer/MakeContextCurrent
           Product: Mesa
           Version: unspecified
          Platform: Other
               URL: https://bugzilla.mozilla.org/show_bug.cgi?id=624935
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: bjacob@mozilla.com


This is the bug forcing us to blacklist Gallium in Firefox 6+.

Steps to reproduce:

0. This has been confirmed with Mesa 7.10.2, Gallium 0.4, and both R300 and
R600 but seems device-independent. I didn't find the proper category for
general Gallium bugs.
1. Grab a Nightly of Firefox:
   http://nightly.mozilla.org/
2. Run it; If you're already using Firefox, you may want to do:
   ./path/to/firefox -no-remote -P
3. Make sure that WebGL is enabled (a bug in parsing version strings makes it
unintentionally blacklist some systems). Go to about:config, set
webgl.force-enabled=true if needed. You can go to about:support to check WebGL
status.
4. Go to http://people.mozilla.com/~sicking/webgl/ray.html

Actual results: segfault

A stack trace is given there:
  https://bugzilla.mozilla.org/show_bug.cgi?id=624935#c0

I discussed this with Corbin Simpson
(https://bugzilla.mozilla.org/show_bug.cgi?id=624935#c6) who told me it was a
known Gallium bug, been discussed on the mailing list already:
http://marc.info/?l=mesa3d-dev&m=126525088903956&w=2
http://marc.info/?l=mesa3d-dev&m=127680073328903&w=2

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[Bug 37253] SIGSEGV in dri2FlushFrontBuffer/MakeContextCurrent

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=37253

Sven Arvidsson <sa@whiz.se> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sa@whiz.se

--- Comment #1 from Sven Arvidsson <sa@whiz.se> 2011-05-23 10:12:27 PDT ---
This is the same as bug 33188 isn't it?

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[Bug 37253] SIGSEGV in dri2FlushFrontBuffer/MakeContextCurrent

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=37253

--- Comment #2 from Benoit Jacob <bjacob@mozilla.com> 2011-05-23 16:22:12 PDT ---
(In reply to comment #1)
> This is the same as bug 33188 isn't it?

Looks like it (didn't know about the other bug), but this bug has more specific
info, and also the testcase link is more specific.

Close the other one as duplicate of this one (despite anachronism) ?

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[Bug 37253] SIGSEGV in dri2FlushFrontBuffer/MakeContextCurrent

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=37253

--- Comment #3 from Sven Arvidsson <sa@whiz.se> 2011-05-24 10:48:14 PDT ---
(In reply to comment #2)
> Close the other one as duplicate of this one (despite anachronism) ?

That's probably a good idea. You could also reassign this bug to component
"Mesa core" as it isn't a problem specific to r600g.

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[Bug 37253] SIGSEGV in dri2FlushFrontBuffer/MakeContextCurrent

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=37253

Benoit Jacob <bjacob@mozilla.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pavel.ondracka@email.cz

--- Comment #4 from Benoit Jacob <bjacob@mozilla.com> 2011-05-24 10:53:14 PDT ---
*** Bug 33188 has been marked as a duplicate of this bug. ***

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[Bug 37253] SIGSEGV in dri2FlushFrontBuffer/MakeContextCurrent

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=37253

Benoit Jacob <bjacob@mozilla.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Drivers/Gallium/r600        |Mesa core
         AssignedTo|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
                   |.org                        |org

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