RFR(XL): JDK-8228441 Field layout requires complete overhaul to efficiently support inline classes

[Brian Goetz]

Great to see support for making it easier to inspect what decisions the VM is actually making here.  Rather than a DCMD, did you consider using JFR events to log these decisions, now that JFR is universally available?

> On Jul 19, 2019, at 11:26 AM, Frederic Parain <frederic.parain at oracle.com> wrote:
> 
> This changeset also includes some options and DCMD to ease inspection
> of layouts, especially when flattenable fields are involved.