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Qt 5.9.4 OpenGL examples crash

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #7

    Do you mean that the cross-compiling environment changed between your 5.3 and 5.9 builds ?

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • F Offline
      F Offline
      fatih.erol
      wrote on last edited by fatih.erol
      #8

      yes. well, 5.3.2 package is taken off the official site, so, it is most likely not cross-compiled. 5.9.4 is cross-built by me.

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      • sierdzioS Offline
        sierdzioS Offline
        sierdzio
        Moderators
        wrote on last edited by
        #9

        Official 5.3.2 are in Qt archive: https://download.qt.io/archive/qt/5.3/5.3.2/

        (Z(:^

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        • F Offline
          F Offline
          fatih.erol
          wrote on last edited by
          #10

          sorry. i meant Qt 5.3.2 package comes from Arch Linux official site, so, it is built and prepared by someone else using respective tools on a i686 development system or chroot environment.

          I downloaded Qt 5.9.4 from download.qt.io, and cross-compiled it myself.

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          • F Offline
            F Offline
            fatih.erol
            wrote on last edited by fatih.erol
            #11

            I wonder whether these are relevant:
            https://bugreports.qt.io/browse/QTBUG-64587
            https://bugreports.qt.io/browse/QTBUG-59636

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #12

              The first one is not implemented and the second is fixed for 5.9.5. You can already test that by building from git.

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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              • F Offline
                F Offline
                fatih.erol
                wrote on last edited by
                #13

                Update on this issue:

                • Qt 5.3.2 built on the 32-bit system : opengl examples run successfully.
                • Qt 5.9.3 built on the 32-bit system : legacy opengl examples run successfully. cube/hellogl2/texture crashes.
                • Qt 5.9.4 cross-compiled for the 32-bit system : legacy opengl examples run successfully. cube/hellogl2/texture crashes.
                • Qt 5.10.1 cross-compiled for the 32-bit system : legacy opengl examples run successfully. cube/hellogl2/texture crashes.

                I haven't managed to cross-compile 5.3.2 yet, to confirm that cross-compilation works properly.
                Here is the stack trace from the crashed cube example application for Qt 5.9.4:

                (gdb) run
                Starting program: /home/root/opengl/cube/cube 
                warning: Could not load shared library symbols for linux-gate.so.1.
                Do you need "set solib-search-path" or "set sysroot"?
                [Thread debugging using libthread_db enabled]
                Using host libthread_db library "/usr/lib/libthread_db.so.1".
                [New Thread 0xb46bab40 (LWP 585)]
                pci id for fd 6: 8086:8108, driver (null)
                
                Program received signal SIGSEGV, Segmentation fault.
                0xb38ce7df in ?? () from /lib/libEMGDOGL.so
                (gdb) thread apply all backtrace
                
                Thread 2 (Thread 0xb46bab40 (LWP 585)):
                #0  0xb7ffd428 in __kernel_vsyscall ()
                #1  0xb6a963fb in poll () from /usr/lib/libc.so.6
                #2  0xb4df8f1d in ?? () from /usr/lib/libxcb.so.1
                #3  0xb4dfaf6b in xcb_wait_for_event () from /usr/lib/libxcb.so.1
                #4  0xb4993703 in ?? () from /usr/lib/libQt5XcbQpa.so.5
                #5  0xb6ddcfb1 in ?? () from /usr/lib/libQt5Core.so.5
                #6  0xb6cd61a6 in start_thread () from /usr/lib/libpthread.so.0
                #7  0xb6aa0e9e in clone () from /usr/lib/libc.so.6
                
                Thread 1 (Thread 0xb4c4c740 (LWP 581)):
                #0  0xb38ce7df in ?? () from /lib/libEMGDOGL.so
                #1  0xb38cee9f in ?? () from /lib/libEMGDOGL.so
                #2  0xb38cdbf1 in ?? () from /lib/libEMGDOGL.so
                #3  0xb38cf44b in ?? () from /lib/libEMGDOGL.so
                #4  0xb38cf9d8 in ?? () from /lib/libEMGDOGL.so
                #5  0xb38d04e8 in ?? () from /lib/libEMGDOGL.so
                #6  0xb385cc81 in ?? () from /lib/libEMGDOGL.so
                #7  0xb38e7b76 in pvroglDrawArrays () from /lib/libEMGDOGL.so
                #8  0xb76ad8b7 in ?? () from /usr/lib/libQt5Gui.so.5
                #9  0xb764d379 in ?? () from /usr/lib/libQt5Gui.so.5
                #10 0xb764dadc in QPlatformBackingStore::composeAndFlush(QWindow*, QRegion const&, QPoint const&, QPlatformTextureList*, QOpenGLContext*, bool) () from /usr/lib/libQt5Gui.so.5
                #11 0xb49b0686 in ?? () from /usr/lib/libQt5XcbQpa.so.5
                #12 0xb79ae3c7 in ?? () from /usr/lib/libQt5Widgets.so.5
                #13 0xb79afa09 in ?? () from /usr/lib/libQt5Widgets.so.5
                #14 0xb79b104d in ?? () from /usr/lib/libQt5Widgets.so.5
                #15 0xb79b17f2 in ?? () from /usr/lib/libQt5Widgets.so.5
                #16 0xb79cbd37 in QWidgetPrivate::syncBackingStore(QRegion const&) () from /usr/lib/libQt5Widgets.so.5
                #17 0xb7a012ea in ?? () from /usr/lib/libQt5Widgets.so.5
                #18 0xb7a01e1a in ?? () from /usr/lib/libQt5Widgets.so.5
                #19 0xb79a0f4a in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
                #20 0xb79a8d2c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
                #21 0xb6fa396c in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
                #22 0xb73690e2 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /usr/lib/libQt5Gui.so.5
                #23 0xb7369df9 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/libQt5Gui.so.5
                #24 0xb7343cec in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Gui.so.5
                #25 0xb4a0298e in ?? () from /usr/lib/libQt5XcbQpa.so.5
                #26 0xb5019ba4 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
                #27 0xb5019ec9 in ?? () from /usr/lib/libglib-2.0.so.0
                #28 0xb5019f96 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
                #29 0xb6ff64b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
                #30 0xb4a02b61 in ?? () from /usr/lib/libQt5XcbQpa.so.5
                #31 0xb6fa13a6 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
                #32 0xb6fa17fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
                #33 0xb6faa796 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
                #34 0xb735f1f1 in QGuiApplication::exec() () from /usr/lib/libQt5Gui.so.5
                #35 0xb79a0ea4 in QApplication::exec() () from /usr/lib/libQt5Widgets.so.5
                #36 0x0804ad69 in main ()
                (gdb) continue
                Continuing.
                [Thread 0xb46bab40 (LWP 585) exited]
                
                Program terminated with signal SIGSEGV, Segmentation fault.
                The program no longer exists.
                (gdb)
                
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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #14

                  Do you also have that with 5.9.5/5.11 Beta ?

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • F Offline
                    F Offline
                    fatih.erol
                    wrote on last edited by
                    #15

                    I haven't tested with 5.9.5 and 5.11, checked only the official releases under https://download.qt.io.

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #16

                      My bad, I'm a bit early for the 5.9.5 release which should happen during March.

                      The beta can be downloaded from the development_releases subfolder.

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • F Offline
                        F Offline
                        fatih.erol
                        wrote on last edited by
                        #17

                        I tried building 5.11.0-beta1, but it fails (I guess, since I have an older mesa-libgl):

                        qeglfskmsgbmwindow.cpp: In member function ‘virtual void QEglFSKmsGbmWindow::resetSurface()’:
                        qeglfskmsgbmwindow.cpp:58:5: error: ‘PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC’ was not declared in this scope
                             PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC createPlatformWindowSurface = nullptr;
                             ^
                        qeglfskmsgbmwindow.cpp:61:9: error: ‘createPlatformWindowSurface’ was not declared in this scope
                                 createPlatformWindowSurface = reinterpret_cast<PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC>(
                                 ^
                        qeglfskmsgbmwindow.cpp:61:56: error: ‘PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC’ does not name a type
                                 createPlatformWindowSurface = reinterpret_cast<PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC>(
                                                                                ^
                        qeglfskmsgbmwindow.cpp:65:9: error: ‘createPlatformWindowSurface’ was not declared in this scope
                             if (createPlatformWindowSurface) {
                                 ^
                        Makefile:2994: recipe for target '.obj/qeglfskmsgbmwindow.o' failed
                        make[2]: *** [.obj/qeglfskmsgbmwindow.o] Error 1
                        
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                        • F Offline
                          F Offline
                          fatih.erol
                          wrote on last edited by
                          #18

                          well, it looks like this is an EMGD<=>mesa<=>Qt issue.

                          • EMGD + mesa 10.1.0 + Qt 5.3.2: OK
                          • EMGD + mesa 10.1.0 + Qt 5.9.4: openGL examples cube/hellogl2/textures crash
                          • EMGD + mesa 10.3.0 + Qt 5.9.4: openGL examples cube/hellogl2/textures run, but EMGD hardware acceleration fails:
                          libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/tls/emgd_dri.so
                          libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/emgd_dri.so
                          libGL: dlopen /usr/lib/xorg/modules/dri/emgd_dri.so failed (/usr/lib/xorg/modules/dri/emgd_dri.so: undefined symbol: _glapi_Dispatch)
                          libGL error: unable to load driver: emgd_dri.so
                          libGL error: driver pointer missing
                          libGL error: failed to load driver: emgd
                          libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/tls/swrast_dri.so
                          libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/swrast_dri.so
                          libGL: Can't open configuration file /root/.drirc: No such file or directory.
                          libGL: Can't open configuration file /root/.drirc: No such file or directory.
                          

                          Any idea on how to get EMGD working with mesa 10.3.0?

                          # ldd -r /usr/lib/xorg/modules/dri/emgd_dri.so 
                          ldd: warning: you do not have execution permission for `/usr/lib/xorg/modules/dri/emgd_dri.so'
                          	linux-gate.so.1 (0xb775f000)
                          	libm.so.6 => /lib/libm.so.6 (0xb74d1000)
                          	libpthread.so.0 => /lib/libpthread.so.0 (0xb74b5000)
                          	libexpat.so.1 => /lib/libexpat.so.1 (0xb748c000)
                          	libdl.so.2 => /lib/libdl.so.2 (0xb7487000)
                          	libdrm.so.2 => /lib/libdrm.so.2 (0xb7478000)
                          	libEMGDOGL.so => /lib/libEMGDOGL.so (0xb71c7000)
                          	libEMGD2d.so => /lib/libEMGD2d.so (0xb71bf000)
                          	libstdc++.so.6 => /lib/libstdc++.so.6 (0xb70c9000)
                          	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb70ac000)
                          	libc.so.6 => /lib/libc.so.6 (0xb6ef4000)
                          	/usr/lib/ld-linux.so.2 (0xb7760000)
                          	libemgdsrv_um.so => /lib/libemgdsrv_um.so (0xb6ed1000)
                          undefined symbol: _glapi_Dispatch	(/usr/lib/xorg/modules/dri/emgd_dri.so)
                          undefined symbol: _glapi_Context	(/usr/lib/xorg/modules/dri/emgd_dri.so)
                          undefined symbol: _glapi_get_dispatch_table_size	(/usr/lib/xorg/modules/dri/emgd_dri.so)
                          undefined symbol: _glapi_get_dispatch	(/usr/lib/xorg/modules/dri/emgd_dri.so)
                          undefined symbol: _glapi_get_context	(/usr/lib/xorg/modules/dri/emgd_dri.so)
                          undefined symbol: _glapi_add_dispatch	(/usr/lib/xorg/modules/dri/emgd_dri.so)
                          undefined symbol: _glapi_set_context	(/usr/lib/xorg/modules/dri/emgd_dri.so)
                          undefined symbol: _glapi_set_dispatch	(/usr/lib/xorg/modules/dri/emgd_dri.so)
                          
                          # strings -a /usr/lib/libglapi.so | grep _glapi_Dispatch
                          _glapi_Dispatch
                          
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                          • F Offline
                            F Offline
                            fatih.erol
                            wrote on last edited by fatih.erol
                            #19

                            so, any suggestions on how to make EMGD + mesa 10.1.0 + Qt 5.9.4 work?
                            Qt 5.3.2 works with the same combination.
                            When Qt 5.3.2 qtbase/examples/opengl is built against Qt 5.9.4, they work as well, except 'stereo buffers' in contextinfo example.
                            When Qt 5.9.4 qtbase/examples/opengl is built against Qt 5.9.4, examples such as cube, textures crash, and 'stereo buffers' in contextinfo fails as well.

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