RFR: 8212663: Remove conservative at_safepoint assert when JFR writes type sets during class unloading

[coleen.phillimore at oracle.com]

Okay.  do_unloading is currently called from only one thread.
thanks,
Coleen

On 10/18/18 11:00 AM, Erik Österlund wrote:
> Hi,
>
> JFR writes type sets during class unloading. It currently asserts this 
> is done in a safepoint. But in fact, it suffices that it is done by a 
> single thread. This assert needs to be relaxed for concurrent class 
> unloading.
>
> Webrev:
> http://cr.openjdk.java.net/~eosterlund/8212663/webrev.00/
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8212663
>
> Thanks,
> /Erik