Thread Local Handshake in JVMTI functions

[Yasumasa Suenaga]

Hi all,

Many JVMTI functions uses VM Operation to get information. However some of them need to stop only one thread - they don't need to stop all threads.
So I think we can use Thread Local Handshake as this webrev. It is example for GetOneCurrentContendedMonitor().

   http://cr.openjdk.java.net/~ysuenaga/jvmti-thread-local-handshake/

Also I think we can replace following VM Operations to Thread Local Handshake:

class VM_GetCurrentLocation
class VM_EnterInterpOnlyMode
class VM_UpdateForPopTopFrame
class VM_SetFramePop
class VM_GetOwnedMonitorInfo
class VM_GetCurrentContendedMonitor
class VM_GetFrameCount
class VM_GetFrameLocation

What do you think?
It it is acceptable, I will file it to JBS and send review request.


Thanks,

Yasumasa