Hello guys,
I'll try to make things short. I am working with several viewers inside a
composite viewer (CullDrawThreadPerContext), which is embedded in a Qt window.
My frame() function in triggered by a QTimer event.
My Scene Graph is mostly dynamic, thus I regularly add and remove nodes from
the scenegraph. I properly set the datavariance of the objects to be modified
and implemented a queue to add my new nodes to the scene graph before frame()
is called, same thing for the deleted nodes.
My problem is quite annoying, because I get random crashes on node creation,
but they seem to always take place at the same point, which is the Scribe
rendering pass. It does not happen when the compositeviewer is set
singlethreaded. I already found a topic which basically tells people not to use
osgFX as nobody really knows if it's thread safe or not, but I would like to
know if I am missing something anywhere.
Here is my stacktrace, if it can be useful in anyway :
0 osgFX::Technique::traverse_implementation(osg::NodeVisitor&,
osgFX::Effect*) /usr/lib/libosgFX.so.80 0x7fcf3820d9bf
1 osgFX::Effect::traverse(osg::NodeVisitor&) /usr/lib/libosgFX.so.80
0x7fcf38208392
2 osgUtil::CullVisitor::apply(osg::Group&)
/usr/lib/libosgUtil.so.80 0x7fcf38702c28
3 osgFX::Scribe::accept(osg::NodeVisitor&) /usr/lib/libosgFX.so.80
0x7fcf3820be32
4 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
5 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
6 osg::MatrixTransform::accept(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf39544d35
7 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
8 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
9 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
10 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
11 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
12 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
13 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
14 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
15 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
16 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
17 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
18 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
19 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
20 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
21 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
22 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
23 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
24 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
25 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
26 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
27 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
28 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
29 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
30 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
31 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
32 osgUtil::CullVisitor::apply(osg::Transform&)
/usr/lib/libosgUtil.so.80 0x7fcf38702e0c
33 osg::PositionAttitudeTransform::accept(osg::NodeVisitor&)
/usr/lib/libosg.so.80 0x7fcf3955bfd5
34 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
35 osgUtil::CullVisitor::apply(osg::Group&)
/usr/lib/libosgUtil.so.80 0x7fcf38702c28
36 osg::Group::accept(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f3112
37 osg::Group::traverse(osg::NodeVisitor&) /usr/lib/libosg.so.80
0x7fcf394f1b23
38 osgUtil::SceneView::cullStage(osg::Matrixd const&, osg::Matrixd const&,
osgUtil::CullVisitor*, osgUtil::StateGraph*, osgUtil::RenderStage*,
osg::Viewport*) /usr/lib/libosgUtil.so.80 0x7fcf387a6a41
39 osgUtil::SceneView::cull() /usr/lib/libosgUtil.so.80
0x7fcf387a2ec8
40 osgViewer::Renderer::cull_draw() /usr/lib/libosgViewer.so.80
0x7fcf38e9f82f
41 osg::GraphicsContext::runOperations() /usr/lib/libosg.so.80
0x7fcf394edc59
42 osg::OperationThread::run() /usr/lib/libosg.so.80
0x7fcf395549d0
43 osg::GraphicsThread::run() /usr/lib/libosg.so.80
0x7fcf394f09a8
44 OpenThreads::ThreadPrivateActions::StartThread(void*)
/usr/lib/libOpenThreads.so.14 0x7fcf38a305ab
45 start_thread 311 0x7fcf35859f6e
46 clone 113 0x7fcf35b699cd
Any thought is welcome !
Cheers,
Arnaud
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=59564#59564
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