RFR: 8305898: Alternative self-forwarding mechanism

[Albert Mingkun Yang]

On Thu, 22 Aug 2024 06:09:42 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> Otherwise we'd have to preserve/restore them.

OK, then it's incorrect to use `init_mark()` for self-fwd objs.

This method is for self-fwd objs only. Can we remove the `else if` part? The non-self-fwd objs are essentially dead, right?

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PR Review Comment: https://git.openjdk.org/jdk/pull/20603#discussion_r1726597935