RFR (XS) - 8159666 Better CDS support for Event-based tracing

[Jiangli Zhou]

Hi Ioi,

Looks good. Could you please add a comment explaining why it needs to set cached class file to NULL in remove_unsharable_info().

Thanks,
Jiangli

> On Jun 15, 2016, at 3:29 PM, Ioi Lam <ioi.lam at oracle.com> wrote:
> 
> Hi,
> 
> Please review this small fix. It allows event-based tracing code to properly remove and restore the trace ID during CDS dump time and JVM run time.
> 
> https://bugs.openjdk.java.net/browse/JDK-8159666
> http://cr.openjdk.java.net/~iklam/jdk9/8159666-cds-event-based-tracing/
> 
> Thanks
> - Ioi