This sounds like something is quite broke at the OpenThreads level. Are you
able to run any of the OSG examples or applications?
-Paul
> I'm having trouble with a segfault in VTP's glutsimple
> application, but it looks like the problem traces back into
> OSG. For reference, I'm using OSG 2.2.0 on Fedora 9, and VTP 080506.
>
> Here's a backtrace:
>
> ScopedLock
> OpenThreads/ScopedLock:31
> osg::Referenced::ref osg/Referenced:128
> osg::ref_ptr<osg::MatrixTransform>::operator= osg/ref_ptr:50
> vtTransform NodeOSG.cpp:1223
> ...
>
> The problem occurs when the osg::MatrixTransform* is assigned
> to an osg::ref_ptr and in particular when the ref_ptr
> assignment tries to lock the mutex. It appears that the mutex
> protected member Referenced._refMutex._prvData is a null pointer.
>
> Here's a modified piece of code from VTP replacing the
> vtTransform constructor that results in a segfault:
>
> vtTransform::vtTransform() : vtGroup(true), vtTransformBase() {
> // Constructs a transform where
> Referenced._refMutex._prvData is null
> osg::MatrixTransform* pxform = new osg::MatrixTransform;
>
> // segfaults on locking since _prvData is null
> osg::ref_ptr<MatrixTransform> rpxform = pxform;
>
> m_pTransform = pxform;
> SetOsgGroup(m_pTransform);
> }
>
> Tracing a bit deeper, the problem seems to be somewhere
> between the osg::MatrixTransform and osg::Transform
> constructors, but I'm not sure how or where.
>
> Inspecting Referenced._refMutex._prvData after the
> osg::Transform constructor has completed,
> Referenced._refMutex = 0x1cb8e70 and
> Referenced._refMutex._prvData = 0x1cb8e90 (both valid pointers).
>
> But, at the end of the osg::MatrixTransform constructor
> Referenced._refMutex still has it's valid pointer to
> 0x1cb8e70 but now Referenced._refMutx._prvData is now 0x00 (null).
>
> Anyone else encountered this? BTW, I tried OSG 2.4 and
> experienced the same behavior.
>
> Thanks,
>
> Rick
>
>
>
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