[osg-users] segfaults with glDeleteShader

[Robert Osfield]

Hi Roman,

I have just built osgearth git head, but had to make a couple of build
fixes to enable me to compile it against OSG head which is OSG-3.5.0.  I
have cloned osgearth on git hub and post my fixes to this:

https://github.com/robertosfield/osgearth

I haven't seen the error you have but do get a warning:

   Error: OpenGL version test failed, requires valid graphics context.

On exit from osgearth_viewer. This suggests that the GLExtensions object is
be constructed during cleanup for some reason.  Since the GLExensions
object is used when called glDeleteShader there is chance the error you
seeing is related to this.

However, if I run the same .earth file with osgviewer I get a clean exit
with no warnings.

Robert


On 2 November 2015 at 09:55, Roman Grigoriev <grigoriev at gosniias.ru> wrote:

> Hi, I use osg and osgearth git version under linux  Lubuntu 15.04 nvidia
> 352 driver.
> And got segfaults on delete shaders
>
> Code:
>
> #0  0x00007ffff34fbe09 in glDeleteShader () from
> /usr/lib/nvidia-352/libGL.so.1
> #1  0x00007ffff6c8bce5 in
> osg::Shader::PerContextShader::~PerContextShader() () from
> /usr/local/lib64/libosg.so.140
> #2  0x00007ffff6c8bf59 in
> osg::Shader::PerContextShader::~PerContextShader() () from
> /usr/local/lib64/libosg.so.140
> #3  0x00007ffff6c8c3ae in osg::Shader::ShaderObjects::~ShaderObjects() ()
> from /usr/local/lib64/libosg.so.140
> #4  0x00007ffff6c8ae8d in osg::Shader::releaseGLObjects(osg::State*) const
> () from /usr/local/lib64/libosg.so.140
> #5  0x00007ffff6c73375 in osg::Program::releaseGLObjects(osg::State*)
> const () from /usr/local/lib64/libosg.so.140
> #6  0x00007ffff7a8af81 in
> osgEarth::VirtualProgram::releaseGLObjects(osg::State*) const () from
> /usr/local/lib64/libosgEarth.so.0
> #7  0x00007ffff7a2eb55 in osgEarth::StateSetCache::prune() () from
> /usr/local/lib64/libosgEarth.so.0
> #8  0x00007ffff7a2ea0e in osgEarth::StateSetCache::pruneIfNecessary() ()
> from /usr/local/lib64/libosgEarth.so.0
> #9  0x00007ffff7a2e8a5 in
> osgEarth::StateSetCache::share(osg::ref_ptr<osg::StateAttribute>&,
> osg::ref_ptr<osg::StateAttribute>&, bool) () from
> /usr/local/lib64/libosgEarth.so.0
> #10 0x00007ffff7a2db0a in (anonymous
> namespace)::ShareStateAttributes::applyStateSet(osg::StateSet*) () from
> /usr/local/lib64/libosgEarth.so.0
> #11 0x00007ffff7a2d89c in (anonymous
> namespace)::ShareStateAttributes::apply(osg::Node&) () from
> /usr/local/lib64/libosgEarth.so.0
> #12 0x00007ffff7895ef6 in osg::Group::accept(osg::NodeVisitor&) () from
> /usr/local/lib64/libosgEarth.so.0
> #13 0x00007ffff7a2e4fd in
> osgEarth::StateSetCache::consolidateStateAttributes(osg::Node*) () from
> /usr/local/lib64/libosgEarth.so.0
> #14 0x00007ffff2e84753 in
> osgEarth::Features::GeometryCompiler::compile(std::list<osg::ref_ptr<osgEarth::Features::Feature>,
> std::allocator<osg::ref_ptr<osgEarth::Features::Feature> > >&,
> osgEarth::Symbology::Style const&, osgEarth::Features::FilterContext
> const&) () from /usr/local/lib64/libosgEarthFeatures.so.0
> #15 0x00007ffff2e825cf in
> osgEarth::Features::GeometryCompiler::compile(osgEarth::Features::FeatureCursor*,
> osgEarth::Symbology::Style const&, osgEarth::Features::FilterContext
> const&) ()
>    from /usr/local/lib64/libosgEarthFeatures.so.0
> #16 0x00007ffff2e6563b in
> osgEarth::Features::GeomFeatureNodeFactory::createOrUpdateNode(osgEarth::Features::FeatureCursor*,
> osgEarth::Symbology::Style const&, osgEarth::Features::FilterContext
> const&, osg::ref_ptr<osg::Node>&) () from
> /usr/local/lib64/libosgEarthFeatures.so.0
> #17 0x00007ffff2e51339 in
> osgEarth::Features::FeatureModelGraph::createStyleGroup(osgEarth::Symbology::Style
> const&, std::list<osg::ref_ptr<osgEarth::Features::Feature>,
> std::allocator<osg::ref_ptr<osgEarth::Features::Feature> > >&,
> osgEarth::Features::FilterContext const&) () from
> /usr/local/lib64/libosgEarthFeatures.so.0
> #18 0x00007ffff2e51726 in
> osgEarth::Features::FeatureModelGraph::createStyleGroup(osgEarth::Symbology::Style
> const&, osgEarth::Symbology::Query const&,
> osgEarth::Features::FeatureIndexBuilder*) ()
>    from /usr/local/lib64/libosgEarthFeatures.so.0
> #19 0x00007ffff2e4eeed in
> osgEarth::Features::FeatureModelGraph::buildLevel(osgEarth::Features::FeatureLevel
> const&, osgEarth::GeoExtent const&, osgEarth::TileKey const*) ()
>    from /usr/local/lib64/libosgEarthFeatures.so.0
> #20 0x00007ffff2e4e08a in
> osgEarth::Features::FeatureModelGraph::load(unsigned int, unsigned int,
> unsigned int, std::string const&) () from
> /usr/local/lib64/libosgEarthFeatures.so.0
> #21 0x00007ffff2e55d1a in
> osgEarthFeatureModelPseudoLoader::readNode(std::string const&,
> osgDB::Options const*) const () from
> /usr/local/lib64/libosgEarthFeatures.so.0
> #22 0x00007ffff67ecb73 in
> osgDB::Registry::ReadNodeFunctor::doRead(osgDB::ReaderWriter&) const ()
> from /usr/local/lib64/libosgDB.so.140
> #23 0x00007ffff67e6903 in
> osgDB::Registry::read(osgDB::Registry::ReadFunctor const&) () from
> /usr/local/lib64/libosgDB.so.140
> #24 0x00007ffff67e786f in
> osgDB::Registry::readImplementation(osgDB::Registry::ReadFunctor const&,
> osgDB::Options::CacheHintOptions) () from /usr/local/lib64/libosgDB.so.140
> #25 0x00007ffff67e831f in
> osgDB::Registry::readNodeImplementation(std::string const&, osgDB::Options
> const*) () from /usr/local/lib64/libosgDB.so.140
> #26 0x00007ffff679a5c6 in osgDB::DatabasePager::DatabaseThread::run() ()
> from /usr/local/lib64/libosgDB.so.140
> #27 0x00007ffff482bb5e in
> OpenThreads::ThreadPrivateActions::StartThread(void*) () from
> /usr/local/lib64/libOpenThreads.so.20
> #28 0x00007ffff58c46aa in start_thread (arg=0x7fffc97fa700) at
> pthread_create.c:333
> #29 0x00007ffff5be1eed in clone () at
> ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
>
>
>
>
> So if I comment line 47 in Shader.cpp
>         if (extensions->isGlslSupported) extensions->glDeleteShader( globj
> );
> and 51 in Program.cpp
>         if (extensions->isGlslSupported) extensions->glDeleteProgram(
> globj );
> and I don't have segfaults.
>
> It's very easily to reproduse simple run osgearth_viewer with any earth
> file.
>
> Thank you!
>
> Cheers,
> Roman[/code]
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=65510#65510
>
>
>
>
>
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