https://bugs.freedesktop.org/show_bug.cgi?id=76252
Priority: medium
Bug ID: 76252
Assignee: mesa-dev@lists.freedesktop.org
Summary: Dynamic loading/unloading of opengl32.dll results in a
deadlock
Severity: major
Classification: Unclassified
OS: Windows (All)
Reporter: cgerlac...@gmail.com
Hardware: x86-64 (AMD64)
Status: NEW
Version: 10.1
Component: Mesa core
Product: Mesa
I'm using llvmpipe for software rendering under windows. To switch easily
between hardware and software rendering I loaded the opengl32.dll dynamically.
Unloading the hardware OpenGL library works fine, but unloading mesa results in
a deadlock.
Stacktrace:
opengl32.dll!lp_rast_destroy(lp_rasterizer * rast) Line 948 C
opengl32.dll!llvmpipe_destroy_screen(pipe_screen * _screen) Line 439 C
opengl32.dll!stw_cleanup() Line 180 C
opengl32.dll!DllMain(HINSTANCE__ * hinstDLL, unsigned long fdwReason, void *
lpReserved) Line 168 C
opengl32.dll!__DllMainCRTStartup(void * hDllHandle, unsigned long dwReason,
void * lpreserved) Line 508 C
ntdll.dll!LdrpUnloadDll () Unknown
ntdll.dll!LdrUnloadDll () Unknown
KernelBase.dll!FreeLibrary () Unknown
QtCore4.dll!QLibraryPrivate::unload_sys() Line 157 C++
QtCore4.dll!QLibraryPrivate::unload() Line 488 C++
Setting LP_NUM_THREADS=0 workarounds this problem.
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