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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash when running qopenglwidget example on mesa llvmpipe win32"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102148">102148</a>
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<th>Summary</th>
<td>Crash when running qopenglwidget example on mesa llvmpipe win32
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>x86 (IA32)
</td>
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<th>OS</th>
<td>Windows (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Mesa core
</td>
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>andreas.roth@fastprotect.net
</td>
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
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<div>
<pre>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
<a href="http://code.qt.io/cgit/qt/qtbase.git/tree/examples/opengl/qopenglwidget?h=5.6">http://code.qt.io/cgit/qt/qtbase.git/tree/examples/opengl/qopenglwidget?h=5.6</a>)
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_wait lp_fence.c
119 0x3436404
4 llvmpipe_fence_finish lp_screen.c
616 0x3433ff9
5 st_context_flush st_manager.c
638 0x3040a08
6 stw_make_current stw_context.c
431 0x301d3cc
7 DrvSetContext stw_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::notifyInternal2 qcoreapplication.cpp
1015 0x6641ee1c
... <More>
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.</pre>
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