On Sun, 3 Feb 2002, Scott A Crosby wrote:

> On Sun, 3 Feb 2002, Hans-Martin Mosner wrote:
>
> --
> Switch to 128/64-bit headers?
>
> -- 64 bits
> 18 length (all zero's indicate long header)
>  2 object type
>      00 - Object contains no references
>      01 - Object is a forwarding pointer.
>      10 - (long header) 4th word in header is an oop to be checked in GC
>      11 - Object weakly references other objects.
>  4 for reserved for GC.
>  8 unused. (for immutible, special behavior, etc) [*]
>
> 16 hashbits
> 16 class# (looked up on a seperate table)
> --

Rereading, its wrong, but you get the idea of the brainstorm.

There needs to be a combination in the object type that signifies that its
a normal object.

Scott