RFR: 8288105: [PPC64] Problems with -XX:+VerifyStack

Fri Jun 10 10:38:05 UTC 2022

Deoptimization and uncommon trap stubs require last Java PC to point to a PC which has an appropriate OopMap. Otherwise, -XX:+VerifyStack does no longer work after [JDK-8284161](https://bugs.openjdk.org/browse/JDK-8284161).
I had to debug through the frame stuff and I made the code a bit more robust and easier to use and debug.

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Commit messages:
 - 8288105: [PPC64] Problems with -XX:+VerifyStack

Changes: https://git.openjdk.org/jdk19/pull/3/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk19&pr=3&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288105
  Stats: 57 lines in 4 files changed: 10 ins; 33 del; 14 mod
  Patch: https://git.openjdk.org/jdk19/pull/3.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/3/head:pull/3

PR: https://git.openjdk.org/jdk19/pull/3