[8u-dev] Request for approval JDK-8165489: Missing G1 barrier in Unsafe_GetObjectVolatile

[Rob McKenna]

This change requires a codereview. As one hasn't been explicitly
requested in the subject line, then HS reviewers may overlook this
email.

    -Rob

On 13/04/18 18:45, Aleksey Shipilev wrote:
> Hi,
> 
> Please approve this fix for 8u. This improves G1 stability in 8u, and provides the base for
> Shenandoah JDK 8 backport that piggybacks on G1 pre-barriers. The fix does not apply cleanly,
> because there is also Unsafe_GetObject140 that needs fixing too.
> 
> JDK 9 bug:
>   https://bugs.openjdk.java.net/browse/JDK-8165489
> 
> JDK 9 fix:
>   http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/a696583f5ddb
> 
> JDK 8u fix:
>   http://cr.openjdk.java.net/~shade/8165489-8u/webrev.01/
> 
> Testing: x86_64 build, Shenandoah tests
> 
> Thanks,
> -Aleksey