RFR: 8266593: vmTestbase/nsk/jvmti/PopFrame/popframe011 fails with "assert(java_thread == _state->get_thread()) failed: Must be" [v2]

[Serguei Spitsyn]

> The test fails when the target JavaThread has is_exiting() status. In such a case the JvmtiExport::cleanup_thread(this) has already made a clean up of its jvmtiThreadState, so the JavaThread address returned by _state->get_thread() is 0xbabababababababa.
> The fix is to add a check for is_exiting() status into handshake closure do_thread() early.
> There following handshake closures are fixed by this update:
>   - UpdateForPopTopFrameClosure
>  - SetForceEarlyReturn
>  - SetFramePopClosure

Serguei Spitsyn has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge
 - remove vmTestbase/nsk/jvmti/PopFrame/popframe011 from ProblemList.txt
 - fix 8266593: vmTestbase/nsk/jvmti/PopFrame/popframe011 fails with assert

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6440/files
  - new: https://git.openjdk.java.net/jdk/pull/6440/files/64f22944..60e784ec

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6440&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6440&range=00-01

  Stats: 1850 lines in 27 files changed: 1576 ins; 95 del; 179 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6440.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6440/head:pull/6440

PR: https://git.openjdk.java.net/jdk/pull/6440