RFR [S] JDK-8179624 [REDO] Avoid repeated calls to JavaThread::last_frame in InterpreterRuntime

[Ioi Lam]

Hi,

Please review the following change. It's a redo of a previous botched
attempt (JDK-8179305) that had a typo which caused JIT-related crashes.

Thanks to Dean for spotting the typo.

+ Bug
https://bugs.openjdk.java.net/browse/JDK-8179624


+ The full changeset:
http://cr.openjdk.java.net/~iklam/jdk10/8179624-redo-8179305-avoid-last-frame.v01.full/


+ The delta from the botched attempt
   (fixing the typo with monitor_begin/monitor_end):
http://cr.openjdk.java.net/~iklam/jdk10/8179624-redo-8179305-avoid-last-frame.v01.redo_delta/


+ Testing:
hotspot tier1~5 tests.


Thanks
- Ioi