[jdk17u-dev] RFR: 8247351: [aarch64] NullPointerException during stack walking (clhsdb "where -a")

[Goetz Lindenmaier]

I backport this for parity with 17.0.10-oracle.

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Commit messages:
 - Backport 357fe09f2e46efa3343f6c8a57b8693dcd5dd43c

Changes: https://git.openjdk.org/jdk17u-dev/pull/1749/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1749&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8247351
  Stats: 5 lines in 2 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1749.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1749/head:pull/1749

PR: https://git.openjdk.org/jdk17u-dev/pull/1749