On Wed, 4 Sep 2024 17:03:32 GMT, Martin Doerr wrote:
>> Tier1 test are fine with/without "saving & restoring" return_pc;
>
> I found it:
> https://github.com/openjdk/jdk/blob/433f6d8a0643b59663bf76c0f3a2af27a6cc56b7/src/hotspot/cpu/s390/gc/g1/g1BarrierSetAssembler_s390.cpp#L238
> Called here:
>
> As discussed in the JBS issue:
>
> FFM upcall stubs embed a `Method*` of the target method in the stub. This
> `Method*` is read from the `LambdaForm::vmentry` field associated with the
> target method handle at the time when the upcall stub is generated. The MH
> instance itself is stashed i
