[jdk21u-dev] RFR: 8333361: ubsan, test : libHeapMonitorTest.cpp:518:9: runtime error: null pointer passed as argument 2, which is declared to never be null

[Matthias Baesken]

8333361: ubsan,test : libHeapMonitorTest.cpp:518:9: runtime error: null pointer passed as argument 2, which is declared to never be null

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Commit messages:
 - Backport ed149062d0e8407710f083aa85d28d27c4a45ecc

Changes: https://git.openjdk.org/jdk21u-dev/pull/861/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=861&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333361
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/861.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/861/head:pull/861

PR: https://git.openjdk.org/jdk21u-dev/pull/861