RFR: 8297877: Risk for uninitialized memory in case of CHECK macro early return as part of field access

[Markus Grönlund]

Greetings,

this change removes the risk of accessing uninitialized memory as part of field access when using the jfrJavaSupport abstraction, in case the klass->initialize(CHECK) early outs.

It includes a small refactoring when in the area.

Testing: jdk_jfr

Thanks
Markus

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Commit messages:
 - 8297877

Changes: https://git.openjdk.org/jdk/pull/11950/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11950&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297877
  Stats: 44 lines in 3 files changed: 13 ins; 15 del; 16 mod
  Patch: https://git.openjdk.org/jdk/pull/11950.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11950/head:pull/11950

PR: https://git.openjdk.org/jdk/pull/11950