[11] RFR: Cease support for shenandoah/jdk11

[Roman Kennke]

Sounds good to me!

Thanks,
Roman

On Wed, 2020-08-12 at 09:52 +0200, Aleksey Shipilev wrote:
> 	Error verifying signature: Cannot verify message signature:
> Incorrect message format
> I think it is time to sunset the sh/jdk11 repository, like we did for
> sh/jdk12:
>   https://hg.openjdk.java.net/shenandoah/jdk12/rev/4436df5d798c
> 
> sh/jdk11 only difference against jdk11 upstream are tags and enabling
> Shenandoah during build:
>   https://builds.shipilev.net/patch-openjdk-shenandoah-jdk11/
> 
> Let's add this patch to sh/jdk11:
> 
> diff -r 4f528121104a
> src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp
> --- a/src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp   Wed
> Aug 12 09:19:23 2020 +0200
> +++ b/src/hotspot/share/gc/shenandoah/shenandoahArguments.cpp   Wed
> Aug 12 09:42:36 2020 +0200
> @@ -29,10 +29,19 @@
>  #include "utilities/defaultStream.hpp"
> 
>  void ShenandoahArguments::initialize() {
> +  log_warning(gc)("*************************************************
> *************************");
> +  log_warning(gc)("*  Shenandoah/JDK 11 is now maintained in
> upstream OpenJDK 11.           *");
> +  log_warning(gc)("*  This JDK would not get security, functionality
> or performance fixes.  *");
> +  log_warning(gc)("*  Use this build at your own
> risk.                                      *");
> +  log_warning(gc)("*                                                
>                         *");
> +  log_warning(gc)("*  For the latest version, use the most recent
> OpenJDK 11 update release *");
> +  log_warning(gc)("*  from the vendor that has Shenandoah enabled in
> their builds.          *");
> +  log_warning(gc)("*************************************************
> *************************");
> +
>  #if !(defined AARCH64 || defined AMD64 || defined IA32)
>    vm_exit_during_initialization("Shenandoah GC is not supported on
> this platform.");
>  #endif
> 
> Testing: sh/jdk11 builds, observing the warning message
>