RFR 8232712: Shenandoah: SIGBUS in load_reference_barrier_native

[Aleksey Shipilev]

On 10/21/19 7:02 PM, Zhengyu Gu wrote:
> I missed aarch64 changes for JDK-8232010[1].
> 
> On aarch64, native barrier does not setup the second parameter (load_addr) for runtime call,
> therefore, the address to CAS is bogus.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8232712
> Webrev: http://cr.openjdk.java.net/~zgu/JDK-8232712/webrev.00/

Roman needs to ack this. This patch allows me to pass the subset of jcstress tests that were
previously failing on aarch64.

-- 
Thanks,
-Aleksey