Hello Michael,
On 05/16/2011 01:14 PM, Michael Raab wrote:
> I'm calling osgExit() explicitly before shutting down our application.
> I don't see any reason why our extension library should be already
> unloaded at this moment.
> Do you have an idea how I can track down the field container type causes
> that problem.
only the two more or less obvious choices of running everything under a
debugger and digging backwards from the crash's stack trace and perhaps
putting a printf() into FieldContainerFactory::terminate(), inside the
for loop to at least get the type id it crashes on.
> Which function is called for each FC type during shutdown?
FieldContainerType::terminate().
> Are there any log messages are generated?
not that I've seen it, looking over the code.
However, I did see that osgExit() does this:
SharedObjectHandler::the()->terminate();
if(osgSystemExitFunctions != NULL)
{
for(Int32 i = osgSystemExitFunctions->size() - 1; i >= 0; i--)
{
returnValue &= (*osgSystemExitFunctions)[i]();
if(returnValue == false)
break;
}
}
Can you try moving the call to SharedObjectHandler::terminate() after
the "if"? Or use
SharedObjectHandler::the()->removeSharedObject("your_library_name");
before calling osgExit() to unload your extension library.
Normally unloading a shared lib would result in the types deregistering
themselves, but if GlobalSystemState == Shutdown (one of the first
things osgExit does is setting this), this does not happen - so this is
a bug. I'm not sure yet if adjusting osgExit as above is the correct way
to fix this.
Cheers,
Carsten
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