[jdk11u-dev] RFR: 8281061: [s390] JFR runs into assertions while validating interpreter frames

[Martin Doerr]

Mostly clean backport of JDK-8281061. Some hunks needed to get integrated manually due to different context. `is_in_full_stack` does not exist in 11u, so the `istate` in stack check line is different. Fix is the same.

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Depends on: https://git.openjdk.java.net/jdk11u-dev/pull/797

Commit messages:
 - Backport 7f19c700707573000a37910dd6d2f2bb6e8439ad

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/811/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=811&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8281061
  Stats: 18 lines in 2 files changed: 2 ins; 3 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/811.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/811/head:pull/811

PR: https://git.openjdk.java.net/jdk11u-dev/pull/811