[9] RFR (XS): 8150436: Incorrect invocation mode when linkToInteface linker is eliminated

[Uwe Schindler]

Hi Vladimir,

thanks for taking care so fast. To me the fix looks fine and this explains why we have seen that with Lucene! I hope my test case was fine, but it was quite clear under which circumstances this happened. As I am not able to build a full patched JDK on my own, but I hope you tried the fix with my test case (as attached to issue).

Many, many thanks!
Uwe

-----
Uwe Schindler
uschindler at apache.org 
ASF Member, Apache Lucene PMC / Committer
Bremen, Germany
http://lucene.apache.org/

> -----Original Message-----
> From: hotspot-compiler-dev [mailto:hotspot-compiler-dev-
> bounces at openjdk.java.net] On Behalf Of Vladimir Ivanov
> Sent: Wednesday, February 24, 2016 5:14 PM
> To: hotspot compiler <hotspot-compiler-dev at openjdk.java.net>
> Subject: [9] RFR (XS): 8150436: Incorrect invocation mode when
> linkToInteface linker is eliminated
> 
> http://cr.openjdk.java.net/~vlivanov/8150436/webrev.00/
> https://bugs.openjdk.java.net/browse/JDK-8150436
> 
> When MH.linkToInterface is eliminated, but the target method is not
> inlined, either default or concrete method is attached to the call site.
> During call site resolution, invokeinterface invocation mode is used,
> but resolution fails when the target method is concrete.
> 
> The fix is to adjust invocation mode to invokevirtual when concrete
> method is attached.
> 
> Testing: failing test, JPRT.
> 
> Thanks!
> 
> Best regards,
> Vladimir Ivanov