RFC: Move forwarding ptr into the object

[Roman Kennke]

Am Dienstag, den 27.09.2016, 14:24 +0100 schrieb Andrew Haley:
> On 27/09/16 14:18, Roman Kennke wrote:
> > 
> > Great work! Some comments...
> 
> I'm a little bit worried that changing object layout in such a
> fundamental way might lead to objections merging this, and might
> break more things.  At the moment almost everything which gets
> an OOP knows the object layout.  Maybe we're just setting ourselves
> up for more pain.

Right. Maybe. Maybe not. If I were them, I'd like it more if the
forwarding ptr would be part of the 'official' object layout, rather
than squeezed into artificial gaps. Seems cleaner *to me*.

Maybe it makes sense to get some feedback from hotspot-gc-dev or maybe
hotspot-dev ?


Roman