IdealGraphVisualizer file compatibility

[Joe Kearney]

Hi,

I've been trying to play with igv from
http://ssw.jku.at/General/Staff/TW/igv.html,
http://ssw.jku.at/General/Staff/PH/ but I don't know how to generate
the required log files. What sort of files should I expect the igv to
be able to read? The example files are graphDocument XMLs. I was
hoping to be able to generate a file with something like the
following:

-XX:+UnlockDiagnosticVMOptions -XX:+LogCompilation -XX:LogFile=output.xml

Needless to say, these hotspot_log files are totally different and the
igv barfs with the below.

java.lang.NullPointerException
	at com.sun.hotspot.igv.data.GraphDocument.addGraphDocument(GraphDocument.java:70)
	at com.sun.hotspot.igv.coordinator.actions.ImportAction$3.run(ImportAction.java:128)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)


How do I get the jvm to generate the right output file?

Many thanks,
Joe