[master] Withdrawn: Use hashtable for obj->edge mapping in JFR, instead of mark-word

[Roman Kennke]

On Tue, 12 Oct 2021 11:49:27 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> JFR overrides the mark-word to (temporarily) store a mapping from object to Edge*. This disturbs the Klass* that we need while tracing for leaks and for later emitting object information. Let's use a hashtable for this, instead, and leave the upper half of the mark-word alone. (The lower half is still used for marking.)
> 
> Testing:
>  - [x] tier1
>  - [x] tier2
>  - [x] jdk/jfr (together with #17 most tests pass, needs one more follow-up test fix)

This pull request has been closed without being integrated.

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PR: https://git.openjdk.java.net/lilliput/pull/18