[Mesa-dev] [Bug 102148] Crash when running qopenglwidget example on mesa llvmpipe win32

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102148

Brian Paul  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |FIXED

--- Comment #4 from Brian Paul  ---
Patch pushed as commit 496a691e3544d082670ac1f33059692510a2a86d

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[Mesa-dev] [Bug 102148] Crash when running qopenglwidget example on mesa llvmpipe win32

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102148

--- Comment #3 from Brian Paul  ---
Thanks for the patch.  Looks good to me.  I'll just clean up the commit message
before pushing.

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[Mesa-dev] [Bug 102148] Crash when running qopenglwidget example on mesa llvmpipe win32

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102148

--- Comment #2 from Andreas Roth  ---
(In reply to frank.richter from comment #1)
> Created attachment 133534 [details] [review]
> Fixes the win32 llvmpipe crash
> 
> Fixes the crash with llvmpipe on Win32 by adding another null check (*fence
> is expected to be non-null).

I tried your fix and it works. Thank you very much!

Hope this fix will land in the official mesa source tree soon.

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[Mesa-dev] [Bug 102148] Crash when running qopenglwidget example on mesa llvmpipe win32

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102148

--- Comment #1 from frank.rich...@gmail.com ---
Created attachment 133534
  --> https://bugs.freedesktop.org/attachment.cgi?id=133534=edit
Fixes the win32 llvmpipe crash

Fixes the crash with llvmpipe on Win32 by adding another null check (*fence is
expected to be non-null).

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[Mesa-dev] [Bug 102148] Crash when running qopenglwidget example on mesa llvmpipe win32

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102148

Bug ID: 102148
   Summary: Crash when running qopenglwidget example on mesa
llvmpipe win32
   Product: Mesa
   Version: git
  Hardware: x86 (IA32)
OS: Windows (All)
Status: NEW
  Severity: normal
  Priority: medium
 Component: Mesa core
  Assignee: mesa-dev@lists.freedesktop.org
  Reporter: andreas.r...@fastprotect.net
QA Contact: mesa-dev@lists.freedesktop.org

i've compiled the latest mesa version with llvmpipe on win32 (with
msvc2015) with
"scons build=debug MSVC_VERSION=14.0 opengl32" (with LLVM 4.0). The version
i've compiled is 165be830fd822b8a76ee35080c214e2243d6d0f6 (from 07.08.2017
14:14:38).

Then I downloaded the QtCreator and tried to run the qopenglwidget example
(see
http://code.qt.io/cgit/qt/qtbase.git/tree/examples/opengl/qopenglwidget?h=5.6)
from Qt version 5.6. I copied the mesa opengl32.dll into the application
directory, but it immediately crashes on application startup.

This is the callstack i get in QtCreator:
1   RtlEnterCriticalSection  ntdll
   0x779d22e2
2   mtx_lock threads_win32.h
  436  0x3435cba
3   lp_fence_waitlp_fence.c
 119  0x3436404
4   llvmpipe_fence_finishlp_screen.c
  616  0x3433ff9
5   st_context_flush st_manager.c
 638  0x3040a08
6   stw_make_current stw_context.c
  431  0x301d3cc
7   DrvSetContextstw_context.c
  930  0x301cc3c
8   wglMakeCurrent   stw_wgl.c
  114  0x4e85eb3
9   QWindowsGLContext::updateObtainedParams  qwindowsglcontext.cpp
  1262 0xd09e6e
10  QWindowsGLContext::QWindowsGLContext qwindowsglcontext.cpp
  1194 0xd09070
11  QOpenGLStaticContext::createContext  qwindowsglcontext.cpp
  266  0xd08a56
12  QWindowsIntegration::createPlatformOpenGLContext
qwindowsintegration.cpp 413  0xcae22e
13  QOpenGLContext::create   qopenglcontext.cpp
 606  0xfab662e
14  QOpenGLWidgetPrivate::initialize qopenglwidget.cpp
  759  0x64da5bca
15  QOpenGLWidget::resizeEvent   qopenglwidget.cpp
  1172 0x64da4ccd
16  QWidget::event   qwidget.cpp
  8913 0x64d68a1b
17  QOpenGLWidget::event qopenglwidget.cpp
  1345 0x64da4e99
18  QApplicationPrivate::notify_helper   qapplication.cpp
 3804 0x64d19b4b
19  QApplication::notify qapplication.cpp
 3767 0x64d17c7e
20  QCoreApplication::notifyInternal2qcoreapplication.cpp
 1015 0x6641ee1c
... 


It crashes because the ctx passed into llvmpipe_fence_finish() is NULL.

Is this a known issue or is there some build option which might result in
some missing functionality which result in this kind of crash.

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