RFR - JDK-8179625 [BACKOUT] of 8179305 Avoid repeated calls to JavaThread::last_frame in InterpreterRuntime

[dean.long at oracle.com]

Sorry for not noticing before, but this looks like it could be the cause 
of the crash:

-    BasicObjectLock* monitor_begin() const {
-      return _last_frame.interpreter_frame_monitor_end();
-    }
-    BasicObjectLock* monitor_end() const {
-      return _last_frame.interpreter_frame_monitor_begin();
-    }

_begin and _end are reversed.

dl


On 5/4/17 6:40 AM, Ioi Lam wrote:
> Hi,
>
> It turns out JDK- 8179305 causes intermittent failures in JPRT, so it 
> needs to be backed out quickly:
>
> https://bugs.openjdk.java.net/browse/JDK-8179625
> http://cr.openjdk.java.net/~iklam/jdk10/8179625-backout-8179305-last-frame.v01/ 
>
>
> Thanks
> - Ioi