RFR(S): 8203921: JFR thread sampling is missing fixes from JDK-8194552

[Erik Gahlin]

Looks good.

Erik

> On 30 May 2018, at 22:44, Markus Gronlund <markus.gronlund at oracle.com> wrote:
> 
> Greetings,
> 
> Please review the following:
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8203921 
> Webrev: http://cr.openjdk.java.net/~mgronlun/8203921/webrev00/
> 
> Summary:
> 
> We did an update to the thread sampler logic in order to support proper indexing to the SMR list as part of https://bugs.openjdk.java.net/browse/JDK-8194552 
> 
> That fix (already reviewed by rwestberg), was lost unfortunately since the branching sandbox for open source did not incorporate JDK-8194552.
> We are seeing similar issues reported now that has already been fixed in JDK-8194552, therefore we need to re-integrate it (minimally customized due to closed vs open).
> 
> Thanks
> Markus
>