RFR: 8189871: Refactor GC barriers to use declarative semantics

[Erik Österlund]

Hi Kim,

On 2017-11-21 08:16, Kim Barrett wrote:
>> On Nov 21, 2017, at 2:07 AM, Kim Barrett <kim.barrett at oracle.com> wrote:
>>
>> Noticed another issue while looking for something else.
> And another one.
>
> The modified unsafe.cpp doesn't use field_offset_(to|from)_byte_offset
> in places where Access is being used. Those functions and their use
> is intentional documentation and abstraction, despite their
> implementations presently being nops. Where Access is being used, the
> offset is now just quietly assumed to be in bytes, ignoring that
> abstraction. I think the use of those functions ought to be retained.

I will file an RFE to re-introduce this no-op abstraction.

Thanks,
/Erik