RFR: 8262973: Verify ParCompactionManager instance in PCAdjustPointerClosure

[Thomas Schatzl]

On Wed, 3 Mar 2021 18:24:44 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Verify the correct ParCompactionManager instance is used by VM/GC threads and some general cleanup.

Lgtm apart from the issues Kim mentioned.

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Marked as reviewed by tschatzl (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2813