[jdk17u-dev] RFR: 8274753: ZGC: SEGV in MetaspaceShared::link_shared_classes

[Goetz Lindenmaier]

I backport this for parity with 17.0.3-oracle.

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Commit messages:
 - Backport 110e38ded8e09361f24c582c770d35f5cfdabf82

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/10/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=10&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274753
  Stats: 38 lines in 3 files changed: 29 ins; 1 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/10.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/10/head:pull/10

PR: https://git.openjdk.java.net/jdk17u-dev/pull/10