[11u] RFR: 8235829: graal crashes with Zombie.java test

[Lindenmaier, Goetz]

Hi Martin,

Thanks for reviewing!

Best regards,
  Goetz.

> -----Original Message-----
> From: Doerr, Martin <martin.doerr at sap.com>
> Sent: Monday, November 23, 2020 2:03 PM
> To: Lindenmaier, Goetz <goetz.lindenmaier at sap.com>; jdk-updates-dev
> <jdk-updates-dev at openjdk.java.net>
> Subject: RE: [11u] RFR: 8235829: graal crashes with Zombie.java test
> 
> Hi Götz,
> 
> right, the nmethod barriers for concurrent class unloading with zGC and
> Shenandoah are not needed in 11u.
> Looks good to me.
> 
> Best regards,
> Martin
> 
> 
> > -----Original Message-----
> > From: jdk-updates-dev <jdk-updates-dev-retn at openjdk.java.net> On
> > Behalf Of Lindenmaier, Goetz
> > Sent: Freitag, 20. November 2020 14:59
> > To: jdk-updates-dev <jdk-updates-dev at openjdk.java.net>
> > Subject: [11u] RFR: 8235829: graal crashes with Zombie.java test
> >
> > Hi,
> >
> > I am downporting this for parity with 11.0.10-oracle.
> >
> > http://cr.openjdk.java.net/~goetz/wr20/8235823-graal_zombie_crash-
> > jdk11/01/
> >
> > The original change adds a lot of BarrierSetNMethod barriers.
> > This barrier type does not exist in 11. It is not needed as no
> > concurrent class unloading is implemented in 11. That was added upstream
> > for ZGC and Shenandoah.
> > I omitted this coding.
> >
> > https://bugs.openjdk.java.net/browse/JDK-8235829
> > https://hg.openjdk.java.net/jdk/jdk14/rev/26bb0fe2270a
> >
> > Best regards,
> >   Goetz.