RFR (XS) 8237080: fatal error: VM thread could block on lock that may be held by a JavaThread during safepoint: SharedDecoder_lock

[Zhengyu Gu]

Looks good to me.

-Zhengyu

On 1/28/20 4:36 PM, coleen.phillimore at oracle.com wrote:
> Summary: Set allow_vm_block to true for this lock.  It's 
> _safepoint_check_never so it's sort of implied (you can't safepoint 
> holding the lock and block out the vm thread).
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/2020/8237080.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8237080
> 
> Ran test case with hard-coded failure, and tier1-6.
> 
> Thanks,
> Coleen
>