RFR: 8203188: Add JEP-181 support to the Zero interpreter

[David Holmes]

Hi Severin,

On 5/06/2018 1:26 AM, Severin Gehwolf wrote:
> Hi,
> 
> Could I please get a review of this change adding support for JEP-181 -
> a.k.a Nestmates - to Zero. This patch depends on David Holmes'
> Nestmates implementation via JDK-8010319. Thanks to David Holmes and
> Chris Phillips for their initial reviews prior to this RFR.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8203188
> webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8203188/webrev.02/

src/hotspot/cpu/zero/methodHandles_zero.cpp

The change here seems to be an existing bug unrelated to nestmate 
changes. IT also begs the question as to what happens in the same 
circumstance with a removed static or "special" method? (I thought I had 
a test for that in the nestmates changes ... will need to double-check 
and add it if missing!).

src/hotspot/share/interpreter/bytecodeInterpreter.cpp

Interpreter changes seem fine - mirroring what is done elsewhere. You 
can delete these incorrect comments:

2576         // This code isn't produced by javac, but could be produced by
2577         // another compliant java compiler.

That code path is taken in more circumstances than the author of that 
comment realized. :)

> Testing:
> 
> Zero on Linux-x86_64 with the following test set:
> 
> test/jdk/java/lang/invoke/AccessControlTest.java
> test/jdk/java/lang/invoke/FinalVirtualCallFromInterface.java
> test/jdk/java/lang/invoke/PrivateInterfaceCall.java
> test/jdk/java/lang/invoke/SpecialInterfaceCall.java
> test/jdk/java/lang/reflect/Nestmates
> test/hotspot/jtreg/runtime/SelectionResolution/InvokeInterfaceICCE.java
> test/hotspot/jtreg/runtime/SelectionResolution/InvokeInterfaceSuccessTest.java
> test/hotspot/jtreg/runtime/Nestmates
> 
> I cannot run this through the submit repo since the main Nestmates
> patch hasn't yet landed in JDK 11. Currently testing a Zero bootcycle-
> images build on x86_64. Thoughts?

I can bundle this in with the nestmate changes when I push them later 
this week. Just send me a pointer to the finalized changeset once its 
finalized. I'll run it all through a final step of testing equivalent 
(actually more than) the submit repo.

Thanks,
David

> Thanks,
> Severin
>