I am out of suggestions, but here are a few questions that I can come up
with:
- did the problematic node come out of the cache, or did it come fresh from
disk?
(modelResult._status has this info)
- Is the parent group (and it's _children vector) still sane?
- If the parent node is still sane, can you match it to the file on disk
and possibly tell what sort of node the problem appears in?
- What is the file format of the file on disk? Do you have (use) multiple
pager threads? Could the file loader have a multithreading problem?
Unless the node is a proxy or pagedlod this appears to be a different
problem than the cache release problem. You say the node looks like
deleted, all I can conclude is that the Node* doesn't point to a valid
node.
Other annoying questions:
Are you sure your build is clean? You say you build osg master, but from
your stack trace
osg130-osg.dll!osg::clone
osg130-osg.dll hints at osg 3.4.0 or 3.4.1 Release candidate 2
Regards, Laurens.
On Thu, Jan 17, 2019 at 11:25 AM Richard Harrison <r...@zaretto.com> wrote:
> Hi Lawrence;
>
> Thanks for the help.
>
> Sorry for the confusion; it doesn't actually fail on that line; it fails
> deep inside CopyOp; this is the stack trace from the previous code;
>
> osg130-osg.dll!osg::CopyOp::operator()(const osg::Node * node) Line
> 56 C++
> osg130-osg.dll!osg::Group::Group(const osg::Group & group, const
> osg::CopyOp & copyop) Line 40 C++
> osg130-osg.dll!osg::Group::clone(const osg::CopyOp & copyop) Line
> 38 C++
> osg130-osg.dll!osg::clone<osg::Node>(const osg::Node * t, const
> osg::CopyOp & copyop) Line 250 C++
> osg130-osg.dll!osg::Group::Group(const osg::Group & group, const
> osg::CopyOp & copyop) Line 40 C++
> osg130-osg.dll!osg::Group::clone(const osg::CopyOp & copyop) Line
> 38 C++
> osg130-osg.dll!osg::clone<osg::Node>(const osg::Node * t, const
> osg::CopyOp & copyop) Line 250 C++
> fgfs.exe!simgear::copyModel(osg::Node * model) Line 94 C++
> fgfs.exe!sgLoad3DModel_internal(const SGPath & path, const
> osgDB::Options * dbOptions, SGPropertyNode * overlay) Line 342 C++
>
> copy model (simgear model.cxx:84) uses the following flags.
>
> Node* copyModel(Node* model)
> {
> const CopyOp::CopyFlags flags = (CopyOp::DEEP_COPY_ALL
> & ~CopyOp::DEEP_COPY_TEXTURES
> & ~CopyOp::DEEP_COPY_IMAGES
> & ~CopyOp::DEEP_COPY_STATESETS
> & ~CopyOp::DEEP_COPY_STATEATTRIBUTES
> & ~CopyOp::DEEP_COPY_ARRAYS
> & ~CopyOp::DEEP_COPY_PRIMITIVES
> // This will preserve display
> lists ...
> & ~CopyOp::DEEP_COPY_DRAWABLES
> & ~CopyOp::DEEP_COPY_SHAPES);
> return (CopyOp(flags))(model);
> }
>
> At the top of the stack inside operator() the node in question is all
> garbage - which looks like something that has been deleted.
>
> osg::Object {_name={...} _dataVariance=???
> _userDataContainer=??? } osg::Object
> _initialBound {_center={_v=0x8003d900ed55904f {???, ???,
> ???} } _radius=??? } osg::BoundingSphereImpl<osg::Vec3f>
> _computeBoundCallback {_ptr=??? }
> osg::ref_ptr<osg::Node::ComputeBoundingSphereCallback>
> _boundingSphere {_center={_v=0x8003d900ed559067 {???, ???,
> ???} } _radius=??? } osg::BoundingSphereImpl<osg::Vec3f>
> _boundingSphereComputed <Unable to read memory>
> _parents { size=??? } std::vector<osg::Group
> *,std::allocator<osg::Group *> >
> _updateCallback {_ptr=??? } osg::ref_ptr<osg::Callback>
> _numChildrenRequiringUpdateTraversal <Unable to read memory>
> _eventCallback {_ptr=??? } osg::ref_ptr<osg::Callback>
> _numChildrenRequiringEventTraversal <Unable to read memory>
> _cullCallback {_ptr=??? } osg::ref_ptr<osg::Callback>
> _cullingActive <Unable to read memory>
> _numChildrenWithCullingDisabled <Unable to read memory>
> _numChildrenWithOccluderNodes <Unable to read memory>
> _nodeMask <Unable to read memory>
> _stateset {_ptr=??? } osg::ref_ptr<osg::StateSet>
>
> On 17/01/2019 10:56, Voerman, L. wrote:
>
> > Hi Richard,
> > I can't see how you can get a segfault on the line you indicate, so I
> > guess the node is somehow corrupted and the segfault is somewhere in
> > the copyOp.
> > I can only guess at what might be going wrong there, but my first
> > guess would be the DEEP_COPY_USERDATA.
> > Laurens.
> >
> > On Thu, Jan 17, 2019 at 8:13 AM Richard Harrison <r...@zaretto.com
> > <mailto:r...@zaretto.com>> wrote:
> >
> > On 15/01/2019 09:03, Robert Osfield wrote:
> >
> > >> illustrated it well) and I'm currently flying one of my long
> > test routes.
> > > Fingers and toes crossed.
> >
> > ..and alas after 30h I've got a similar looking problem; the
> > pattern is
> > the same i.e. DatabasePager loading something whilst ObjectCache is
> > expiring.
> >
> > This time it's a segfault in the DatabasePager during a copy of a
> > model
> > that has just been loaded (simgear, SGReaderWriterXML.cxx:342)
> >
> > options->setDatabasePath(texturepath.local8BitStr());
> > osgDB::ReaderWriter::ReadResult modelResult;
> > modelResult =
> > osgDB::readRefNodeFile(modelpath.local8BitStr(),
> > options.get());
> > if (!modelResult.validNode())
> > throw sg_io_exception("Failed to load 3D model:" +
> > modelResult.message(),
> > modelpath);
> > > model = copyModel(modelResult.getNode());
> >
> > The object currently being expired in the ObjectCache doesn't seem to
> > bear any relation to the model being loaded; one is a windsock and
> > the
> > other a radio tower.
> >
> > This is after I changed all of the osg::getSomething into
> > osg::getRefSomething.
> >
> > I'm now a little confused as I was sure that the fix would work; I've
> > kept the debug session open in case there is anything that I need to
> > inspect.
> >
> >
> > _______________________________________________
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> > <mailto:osg-users@lists.openscenegraph.org>
> >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
> >
> > _______________________________________________
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> >
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>
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