RFR: JDK-8221341 - Update Graal

[Doug Simon]

> On 28 Mar 2019, at 18:48, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
> On 3/28/19 12:37 AM, jesper.wilhelmsson at oracle.com wrote:
>> Hi,
>> Please review the patch to integrate the latest Graal changes into OpenJDK.
>> Graal tip to integrate: 7970bd76ff60600ab5a2fc96cd24ddd7ed017cf8
>> JBS duplicates fixed by this integration:
>> https://bugs.openjdk.java.net/browse/JDK-8220643
>> https://bugs.openjdk.java.net/browse/JDK-8220810
>> JBS duplicates deferred to the next integration:
>> https://bugs.openjdk.java.net/browse/JDK-8214947
> 
> We should investigate why this bug is still referenced in RFR. We already discussed it:
> https://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2019-March/033130.html
> 
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8221341
>> Webrev: http://cr.openjdk.java.net/~jwilhelm/8221341/webrev.00/
> 
> We also discussed indentation change in make/test/JtregGraalUnit.gmk
> Why the change showed up again?
> 
> Otherwise changes looks good.
> 
> Doug, it is good to have only one Graal class to access Unsafe class - GraalUnsafeAccess.java.
> But we should not use sun.misc.Unsafe in JDK 13 - we should have version for JDK9+ which use jdk.internal.misc.Unsafe. It is for an other update.

Shouldn’t we use sun.misc.Unsafe for as long as it’s available? The advantage is that it is publicly exported and means no need for —add-exports when running/testing Graal from outside JDK.

-Doug