RFR: 8288105: [PPC64] Problems with -XX:+VerifyStack [v3]

[Martin Doerr]

> 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.

Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:

  Simplify frame(void* sp, void* fp, void* pc).

-------------

Changes:
  - all: https://git.openjdk.org/jdk19/pull/3/files
  - new: https://git.openjdk.org/jdk19/pull/3/files/54b8c52e..63dc3c61

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk19&pr=3&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk19&pr=3&range=01-02

  Stats: 11 lines in 1 file changed: 0 ins; 10 del; 1 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