RFR: 8224852: JVM crash on watched field access from native code [v2]

[Leonid Mesnik]

> The problem happens when jni access fields while the last java frame is still compiled. The field access/modification events require interp only mode and compiled frame is not expected. However,  It might happens if thread switched to interponly mode while it is in JNI code. The deoptimization is triggered but each frame is really changed only execution returns to it.  So last java frame was not executed and thus is still compiled. 
> 
> The original example doesn't reproduce issue because of JDK changes but the problem exists in JVMTI. So I implemented reliable regression test. 
> 
> The location should be zero for JNI access.

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

  fixed comment

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/27584/files
  - new: https://git.openjdk.org/jdk/pull/27584/files/8b18b5bb..bb5837ec

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27584&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27584&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27584.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27584/head:pull/27584

PR: https://git.openjdk.org/jdk/pull/27584