RFR: 8367249: [REDO] MemBaseline accesses VMT without using lock [v5]

[Johan Sjölen]

> Hi,
> 
> This is a REDO, as the previous attempt caused build failures when merged with latest master.
> The only difference is that the copy ctr for the RBTRee had been integrated with a different PR, but it never should have been. I deleted the copy ctr.
> 
> Thanks.

Johan Sjölen has updated the pull request incrementally with one additional commit since the last revision:

  How did this even work in any release build?

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27170/files
  - new: https://git.openjdk.org/jdk/pull/27170/files/032fc800..c07e5cc3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27170&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27170&range=03-04

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27170.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27170/head:pull/27170

PR: https://git.openjdk.org/jdk/pull/27170