Re: [Xen-cim] RE: Null pointer exception

[Gareth S Bestor <bestor@xxxxxxxxxx>]

> When it looks for some property value like so propertyvalue =
> > CMGetProperty(vssd, "OnReboot", status) And that property
> value does
> > not exist, I am getting an error like this.

I would think you'd get a compile error/warning, but in case not, you should be passing in a pointer to the status var. eg

{
CMPIStatus status = {CMPI_RC_OK, NULL};
...
propertyvalue = CMGetProperty(instance, "Arch", &status);
if ((status.rc != CMPI_RC_OK) || CMIsNullValue(propertyvalue)) ...
}

- G

"Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx>

"Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx>
Sent by: xen-cim-bounces@xxxxxxxxxxxxxxxxxxx

03/02/07 01:09 PM

To	"Jim Fehlig" <jfehlig@xxxxxxxxxx>
cc	xen-cim@xxxxxxxxxxxxxxxxxxx
Subject	[Xen-cim] RE: Null pointer exception

> > I think I understand why I am getting the null pointer exception. 
> > The VSManagement service parses the Virtual Systems Setting 
> Data, in 
> > the function vssd2xenconfig.
> > When it looks for some property value like so propertyvalue = 
> > CMGetProperty(vssd, "OnReboot", status) And that property 
> value does 
> > not exist, I am getting an error like this.
> > RequestHandlerIFCXML::doProcess caught
> > Exception:OW_COWIntrusiveReference.cpp: 62
> > NULLCOWIntrusiveReferenceException: NULL COWReference dereferenced 
> > Clearly this shouldn't be happening.
> > Any idea how I can debug this?
> Have you updated your schema?  E.g. 'owmofc 
> Xen_ComputerSystemSettingData.mof'.  Or easier, 'make 
> postinstall' to ensure all classes are updated in the cimom.
Yeah, still happens.

The issue is not with OnReboot exactly.
Let's say I am using a bootloader and I don't enter the Kernel parameter
in the python file. 
When it runs the CMGetProperty for the 'Kernel' option, it dies with
that same exception.

Raj

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