[osg-users] How to debug this SIGSEGV

Fri May 22 23:30:30 PDT 2020

remove or hide some nodes (setting nodemask to 0) from your scenegraph until you find the one causing the issue.

Use a StateSetHandler to turn on or off rendering features.

Make sure the opengl context is current every time you update/render the scene graph.

Capture osg logging.

Looks like it happens during the rendering of a VBO in a osg::Geometry.

Sent from my iPhone

> On May 22, 2020, at 10:59 PM, Brett Gossage <bgossagen at gmail.com> wrote:
> 
> 
> Build in debug mode.  Run it under valgrind:   valgrind  <your app>  arg1 arg2 ...
> 
> Go through the steps necessary to duplicate the error.
> 
> You'll get a call stack output to the console with the origin of the error. (hopefully)
> 
> Good luck.
> 
> 
> 
> 
> 
> 
>> On Fri, May 22, 2020 at 4:53 PM Erik Hensens <hensens at gmail.com> wrote:
>> Hello! I am totally at a loss and I hope someone can help me. I've got a Gtk application running on Ubuntu that uses osgGtk to display the scene. The crash does not happen every time I do the same operation, only sometimes. As you can see, the crash is in libosg. I guess that I'm doing something wrong in an Osg call somewhere and the crash is just happening asynchronously? Either way I have absolutely no idea how to approach fixing this crash. Please help me! Here's a typical backtrace. Does anyone have any ideas? Thank you all so much in advance!
>> 
>> - Erik
>> 
>> #0  0x00007fffd2e90eea in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
>> #1  0x00007fffd2d2f5e0 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
>> #2  0x00007fffd2e9ddb0 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
>> #3  0x00007ffff55af488 in osg::Geometry::drawImplementation(osg::RenderInfo&) const () from /usr/lib/x86_64-linux-gnu/libosg.so.100
>> #4  0x00007ffff47d1380 in osgUtil::RenderLeaf::render(osg::RenderInfo&, osgUtil::RenderLeaf*) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
>> #5  0x00007ffff47cb695 in osgUtil::RenderBin::drawImplementation(osg::RenderInfo&, osgUtil::RenderLeaf*&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
>> #6  0x00007ffff47cb6d4 in osgUtil::RenderBin::drawImplementation(osg::RenderInfo&, osgUtil::RenderLeaf*&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
>> #7  0x00007ffff47d6ed7 in osgUtil::RenderStage::drawImplementation(osg::RenderInfo&, osgUtil::RenderLeaf*&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
>> #8  0x00007ffff47d5cd2 in osgUtil::RenderStage::drawInner(osg::RenderInfo&, osgUtil::RenderLeaf*&, bool&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
>> #9  0x00007ffff47d7c7f in osgUtil::RenderStage::draw(osg::RenderInfo&, osgUtil::RenderLeaf*&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
>> #10 0x00007ffff47dfdb7 in osgUtil::SceneView::draw() () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
>> #11 0x00007ffff443545f in osgViewer::Renderer::cull_draw() () from /usr/lib/x86_64-linux-gnu/libosgViewer.so.100
>> #12 0x00007ffff55cfd49 in osg::GraphicsContext::runOperations() () from /usr/lib/x86_64-linux-gnu/libosg.so.100
>> #13 0x00007ffff446c6c4 in osgViewer::ViewerBase::renderingTraversals() () from /usr/lib/x86_64-linux-gnu/libosgViewer.so.100
>> #14 0x0000000000a7c73e in osgViewer::ViewerGtk::on_graphics_window_expose_event (widget=0x31134b0, event=0x7fffffffdf10, data=0x456ba50) at Main3D/osgGtk/ViewerGtk.cpp:220
>> #15 0x00007ffff78beaec in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
>> #16 0x00007ffff6904fa5 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
>> #17 0x00007ffff6916fc1 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
>> #18 0x00007ffff691f7f9 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
>> #19 0x00007ffff692008f in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
>> #20 0x00007ffff79d693c in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
>> #21 0x00007ffff78bd7dd in gtk_main_do_event () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
>> #22 0x00007ffff7518b9f in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
>> #23 0x00007ffff7515671 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
>> #24 0x00007ffff7515fa8 in gdk_window_process_all_updates () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
>> #25 0x00007ffff7842971 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
>> #26 0x00007ffff74f4d57 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
>> #27 0x00007ffff662e04a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
>> #28 0x00007ffff662e3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
>> #29 0x00007ffff662e712 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
>> #30 0x00007ffff78bc697 in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
>> #31 0x000000000130f9a6 in main (argc=1, argv=0x7fffffffe398) at Main/main.cpp:3889
>> 
>> 
>> 
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