RFR: 8361238: G1 tries to get CPU info from terminated threads at shutdown

[Thomas Schatzl]

Hi all,

  please review this fix after the recent changes in void JDK-8274051 where G1 tries to get thread cpu time on already terminated threads.

The fix is to move the printing/statistics before stopping the threads. This seems fine for the two implementors of the method.

In a future change, since so few GCs implement `print_tracing_info`, the call should probably move to `stop()/begin_exit()`.

Testing: gha

Thanks,
  Thomas

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Commit messages:
 - 8361238

Changes: https://git.openjdk.org/jdk/pull/26086/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26086&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361238
  Stats: 2 lines in 1 file changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26086.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26086/head:pull/26086

PR: https://git.openjdk.org/jdk/pull/26086