[jdk16] RFR: 8257621: JFR StringPool misses cached items across consecutive recordings [v7]

[Markus Grönlund]

> Greetings,
> 
> this change fixes problems with the StringPool as it relates to chunk rotations.
> 
> Thanks
> Markus

Markus Grönlund has updated the pull request incrementally with one additional commit since the last revision:

  protect this.currentSizeUTF16 on reset

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk16/pull/18/files
  - new: https://git.openjdk.java.net/jdk16/pull/18/files/ad69b843..4e1c32c4

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk16&pr=18&range=06
 - incr: https://webrevs.openjdk.java.net/?repo=jdk16&pr=18&range=05-06

  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk16/pull/18.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16 pull/18/head:pull/18

PR: https://git.openjdk.java.net/jdk16/pull/18