[jdk13u-dev] RFR: 8239477: jdk/jfr/jcmd/TestJcmdStartStopDefault.java fails -XX:+VerifyOops with "verify_oop: rsi: broken oop"

[Ekaterina Vergizova]

I would like to backport 8239477 to 13u, it's already included into 11u.

The patch doesn't apply cleanly due to the different context (8245957 is not in 13u), reapplied manually.

Tested with tier1 and jdk/jfr, the affected test fails without the patch and passes with it.

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Commit messages:
 - Backport b5775c831d27544870b6155cadc7d9861b93c438

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/19/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=19&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8239477
  Stats: 9 lines in 1 file changed: 4 ins; 2 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/19.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/19/head:pull/19

PR: https://git.openjdk.java.net/jdk13u-dev/pull/19