RFR 8038797: JVMTI FollowReferences does not report roots reachable from nmethods

[dean.long at oracle.com]

Can you make it work for any CompiledMethod and not just nmethods?

I believe oops_do() also picks up klass_holder() oops that were added to 
keep metadata references alive.  So for those you will most likely get a 
ClassLoader and not the Class object.  To get the Class object I think 
you would need to use something like metadata_do(). Does 
FollowReferences care either way?

dl

On 8/11/16 10:44 AM, Coleen Phillimore wrote:
> Summary: Also follow nmethods found on the execution stack.
>
> I have this fix to follow nmethods found on the execution stack but 
> not really a good way to test it.  There are two tests internally that 
> exercise this code and with some printing, I verified that they do the 
> right thing.   I am open to suggestions how to test this, it requires 
> compiled methods on the stack with oops that are only referenced from 
> said methods in the oop section (not in locals or on stack).
>
> Also ran the tonga colocated/non-colocated internal tests, 
> jdk/test/com/sun/jdi.
>
> scp -r /home/cphillim/home/public_html/webrev/8038797.01 
> coleenp at cr.openjdk.java.net:
> open webrev at http://cr.openjdk.java.net/~coleenp/8038797.01/webrev
>
>
> thanks,
> Coleen