RFR: 8299683: [S390X] Problems with -XX:+VerifyStack [v3]

[sid8606]

> Deoptimization and uncommon trap stubs require last Java PC to point to a PC which has an appropriate OopMap. Adjusting a offset for PC in last java frame.

sid8606 has updated the pull request incrementally with one additional commit since the last revision:

  Calculate Oop Map offset for last java frame

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Changes:
  - all: https://git.openjdk.org/jdk/pull/12161/files
  - new: https://git.openjdk.org/jdk/pull/12161/files/86c02aa4..43a64f04

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12161&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12161&range=01-02

  Stats: 4 lines in 1 file changed: 0 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/12161.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12161/head:pull/12161

PR: https://git.openjdk.org/jdk/pull/12161