RFR: JDK-8202676: AArch64: Missing enter/leave around barrier leads to infinite loop

[Erik Osterlund]

Hi Roman,

Looks good.

Thanks,
/Erik

> On 4 May 2018, at 23:29, Roman Kennke <rkennke at redhat.com> wrote:
> 
> In aarch64's
> TemplateInterpreterGenerator::generate_Reference_get_entry(void), there
> used to be enter()/leave() calls around the g1 pre-barrier. This is
> necessary in case the barrier calls into the runtime, to setup/remove
> stack frames for the call. With the interpreter BarrierSetAssembler
> work, this seems to have been dropped. It does lead to stack corruption,
> sometimes endless loops, etc.
> 
> This patch re-instates the enter() and leave() calls around the barrier
> where they used to be.
> 
> http://cr.openjdk.java.net/~rkennke/JDK-8202676/webrev.00/
> 
> Can I please get a review?
> 
> Thanks, Roman
>