Hi Yasumasa,
On 31/03/2020 8:06 pm, Yasumasa Suenaga wrote:
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().
True, but at the moment handshakes involve the VMThread. There is work
being done to support direct thread-to-thread handshakes and once that
is done this kind of conversion should be more easily done. It might be
worth waiting for that.
http://cr.openjdk.java.net/~ysuenaga/jvmti-thread-local-handshake/
An observation, it seems to me that calling_thread is not used when this
is not a VMOperation.
Cheers,
David
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
