Hi Gareth, Does the crash occur for applications using osgEarth/OSG without Qt?
It's a bit hacky but would be worth trying to just scope out the issue further : try loading all the OSG plugins that might be required prior to starting Qt. Robert. On 21 September 2015 at 11:38, Gareth Francis <[email protected]> wrote: > CentOS 6.5 > OSG 3.4.0 > osgEarth 2.7 > > > You might be right, I've just got the same crash using RTLD_LOCAL.. > I've been having several problems relating to osgQt/X11 threading, so it's > possible that this is another symptom of that. > > I can't reproduce this under a debugger, however I have been able to get a > core dump/backtrace: > > Program terminated with signal SIGSEGV, Segmentation fault. > #0 0x000000371e479bb7 in _int_malloc () from /lib64/libc.so.6 > (gdb) bt > #0 0x000000371e479bb7 in _int_malloc () from /lib64/libc.so.6 > #1 0x000000371e47b7da in _int_realloc () from /lib64/libc.so.6 > #2 0x000000371e47baf5 in realloc () from /lib64/libc.so.6 > #3 0x0000003c9e4a92ab in ?? () from /usr/lib64/libGL.so.1 > #4 0x0000003c9e4aabd1 in ?? () from /usr/lib64/libGL.so.1 > #5 0x0000003c9e4b148d in ?? () from /usr/lib64/libGL.so.1 > #6 0x0000003c9e4aa345 in ?? () from /usr/lib64/libGL.so.1 > #7 0x000000371e012bc3 in dl_open_worker () from > /lib64/ld-linux-x86-64.so.2 > #8 0x000000371e00e266 in _dl_catch_error () from > /lib64/ld-linux-x86-64.so.2 > #9 0x000000371e0125aa in _dl_open () from /lib64/ld-linux-x86-64.so.2 > #10 0x000000371f000f66 in dlopen_doit () from /lib64/libdl.so.2 > #11 0x000000371e00e266 in _dl_catch_error () from > /lib64/ld-linux-x86-64.so.2 > #12 0x000000371f00129c in _dlerror_run () from /lib64/libdl.so.2 > #13 0x000000371f000ee1 in dlopen@@GLIBC_2.2.5 () from /lib64/libdl.so.2 > #14 0x00007f48a4c87603 in > osgDB::DynamicLibrary::getLibraryHandle(std::string const&) () from > /projects/osg/release/lib64/libosgDB.so.130 > #15 0x00007f48a4c87ba0 in osgDB::DynamicLibrary::loadLibrary(std::string > const&) () from /projects/osg/release/lib64/libosgDB.so.130 > #16 0x00007f48a4cb5137 in osgDB::Registry::loadLibrary(std::string const&) > () from /projects/osg/release/lib64/libosgDB.so.130 > #17 0x00007f48a4cba9c6 in > osgDB::Registry::read(osgDB::Registry::ReadFunctor const&) () from > /projects/osg/release/lib64/libosgDB.so.130 > #18 0x00007f48a4cbb631 in > osgDB::Registry::readImplementation(osgDB::Registry::ReadFunctor const&, > osgDB::Options::CacheHintOptions) () > from /projects/osg/release/lib64/libosgDB.so.130 > #19 0x00007f48a4cbbd5a in > osgDB::Registry::readObjectImplementation(std::string const&, > osgDB::Options const*) () from /projects/osg/release/lib64/libosgDB.so.130 > #20 0x00007f48a4cac4e8 in osgDB::readRefObjectFile(std::string const&, > osgDB::Options const*) () from /projects/osg/release/lib64/libosgDB.so.130 > #21 0x00007f48a58576a1 in osgText::readRefFontFile(std::string const&, > osgDB::Options const*) () from /projects/osg/release/lib64/libosgText.so.130 > #22 0x00007f48a586ae4a in osgText::TextBase::setFont(std::string const&) > () from /projects/osg/release/lib64/libosgText.so.130 > #23 0x00007f48a7de6397 in > osgViewer::StatsHandler::setUpScene(osgViewer::ViewerBase*) () from > /projects/osg/release/lib64/libosgViewer.so.130 > #24 0x00007f48a7deda3f in > osgViewer::StatsHandler::handle(osgGA::GUIEventAdapter const&, > osgGA::GUIActionAdapter&) () from > /projects/osg/release/lib64/libosgViewer.so.130 > #25 0x00007f48a82f0192 in osgGA::GUIEventHandler::handle(osgGA::Event*, > osg::Object*, osg::NodeVisitor*) () from > /projects/osg/release/lib64/libosgGA.so.130 > #26 0x00007f48a7e0af93 in osgViewer::Viewer::eventTraversal() () from > /projects/osg/release/lib64/libosgViewer.so.130 > #27 0x00007f48a7e12979 in osgViewer::ViewerBase::frame(double) () from > /projects/osg/release/lib64/libosgViewer.so.130 > #28 0x00007f48a61e7e6e in QWidget::event(QEvent*) () from > /projects/osg/release/lib64/libQtGui.so.4 > #29 0x00007f48a6ca0d8c in QGLWidget::event(QEvent*) () from > /projects/osg/release/lib64/libQtOpenGL.so.4 > #30 0x00007f48a619949c in QApplicationPrivate::notify_helper(QObject*, > QEvent*) () from /projects/osg/release/lib64/libQtGui.so.4 > #31 0x00007f48a619f981 in QApplication::notify(QObject*, QEvent*) () from > /projects/osg/release/lib64/libQtGui.so.4 > #32 0x00007f48a5c4122c in QCoreApplication::notifyInternal(QObject*, > QEvent*) () from /projects/osg/release/lib64/libQtCore.so.4 > #33 0x00007f48a61ea88c in QWidgetPrivate::drawWidget(QPaintDevice*, > QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () > from /projects/osg/release/lib64/libQtGui.so.4 > #34 0x00007f48a63b2b1c in QWidgetPrivate::repaint_sys(QRegion const&) () > from /projects/osg/release/lib64/libQtGui.so.4 > #35 0x00007f48a61ddf64 in QWidgetPrivate::syncBackingStore() () from > /projects/osg/release/lib64/libQtGui.so.4 > #36 0x00007f48a61e83fc in QWidget::event(QEvent*) () from > /projects/osg/release/lib64/libQtGui.so.4 > #37 0x00007f48a6ca0d8c in QGLWidget::event(QEvent*) () from > /projects/osg/release/lib64/libQtOpenGL.so.4 > #38 0x00007f48a619949c in QApplicationPrivate::notify_helper(QObject*, > QEvent*) () from /projects/osg/release/lib64/libQtGui.so.4 > #39 0x00007f48a619f981 in QApplication::notify(QObject*, QEvent*) () from > /projects/osg/release/lib64/libQtGui.so.4 > #40 0x00007f48a5c4122c in QCoreApplication::notifyInternal(QObject*, > QEvent*) () from /projects/osg/release/lib64/libQtCore.so.4 > #41 0x00007f48a5c4530b in > QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () > from /projects/osg/release/lib64/libQtCore.so.4 > #42 0x00007f48a623d471 in ?? () from > /projects/osg/release/lib64/libQtGui.so.4 > #43 0x00007f48a5c3ff12 in > QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from > /projects/osg/release/lib64/libQtCore.so.4 > #44 0x00007f48a5c40274 in > QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from > /projects/osg/release/lib64/libQtCore.so.4 > #45 0x00007f48a5c456cb in QCoreApplication::exec() () from > /projects/osg/release/lib64/libQtCore.so.4 > #46 0x0000000000412f5f in main (argc=1, argv=0x7ffec6063ec8) at main.cpp:96 > > > > On 21 September 2015 at 11:26, Robert Osfield <[email protected]> > wrote: > >> Hi Gareth, >> >> I don't recall this being an issue before. What hardware, OS and >> OSG/osgEarth versions are you using? >> >> Robert. >> >> On 21 September 2015 at 11:15, Gareth Francis <[email protected]> >> wrote: >> >>> >>> I believe I found a bug in getLibraryHandle. >>> >>> This was encountered when writing an osgEarth application, using the >>> osgEarthQt widgets (Qt 4.8.6). >>> >>> A segfault was encountered shortly after starting the application, when >>> pressing 's' (To bring up the standard set of rendering stats). >>> >>> I traced this to the dlopen( localLibraryName.c_str(), RTLD_LAZY | >>> RTLD_GLOBAL) call in osg/src/osgDB/DynamicLibrary.cpp >>> >>> According to the dlopen manpage: >>> >>> As at glibc 2.21, specifying the *RTLD_GLOBAL *flag when calling >>> *dlmopen*() generates an error. Furthermore, specifying >>> *RTLD_GLOBAL* >>> when calling *dlopen*() results in a program crash (*SIGSEGV*) if the >>> call is made from any object loaded in a namespace other than the >>> initial namespace. >>> >>> >>> Changing osg to use RTLD_LOCAL avoids the crash, and doesn't seem to >>> break anything else as far as I can tell. >>> >>> Is there a specific reason why RTLD_GLOBAL is used? This doesn't make >>> much sense given the plugin architecture.. >>> >>> >>> I've attached a minimal patch including the fix. >>> >>> >>> Thanks >>> Gareth Francis >>> >>> _______________________________________________ >>> osg-users mailing list >>> [email protected] >>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >>> >>> >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> > > > -- > -------------------- > Gareth Francis > www.gfrancisdev.co.uk > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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