[10] RFR for JDK-8169961: Memory leak after debugging session

[Shafi Ahmad]

May I get it reviewed by someone from serviceability group.

Webrev link: http://cr.openjdk.java.net/~shshahma/8169961/webrev.01/
This review thread: http://mail.openjdk.java.net/pipermail/serviceability-dev/2017-July/021538.html

Regards,
Shafi

> -----Original Message-----
> From: Shafi Ahmad
> Sent: Monday, July 24, 2017 12:52 PM
> To: serviceability-dev at openjdk.java.net
> Subject: RE: [10] RFR for JDK-8169961: Memory leak after debugging session
> 
> Hi,
> 
> > -----Original Message-----
> > From: Langer, Christoph [mailto:christoph.langer at sap.com]
> > Sent: Monday, July 17, 2017 9:01 PM
> > To: Poonam Parhar <poonam.bajaj at oracle.com>
> > Cc: Shafi Ahmad <shafi.s.ahmad at oracle.com>; serviceability-
> > dev at openjdk.java.net
> > Subject: RE: [10] RFR for JDK-8169961: Memory leak after debugging
> > session
> >
> > Hi Poonam,
> >
> >
> > > Line 182: Here, eventController.release() is called after the 'vm' is
> disposed.
> > > And eventController.release() causes the following statement to be
> > > executed on the eventcontroller thread after the 'vm' is disposed:
> > >
> > > JDWP.VirtualMachine.ReleaseEvents.process(vm);
> > >
> > > Which does not seem to be right. Someone from the Serviceability
> > > group can confirm the correctness of this change.
> >
> > I think this is okay, because with the new change shouldListen() is
> > called right after the thread returns from wait(). And this will lead
> > to the thread immediately exiting.
> > JDWP.VirtualMachine.ReleaseEvents.process(vm);
> > should not be called in this case.
> >
> > > Line 330: Instance variable 'VirtualMachineImpl vm' is removed from
> > > the EventController class. It is being used further down in its
> > > run() method. So I think it cannot be removed.
> >
> > The vm object is used from the outer class TargetVM, as
> > EventController is an inner class of it.
> >
> > So in my view it's all correct but still somebody of the
> > serviceability group might know better...
> 
> Could someone from serviceability group review this.
> 
> Regards,
> Shafi
> 
> >
> > Best regards
> > Christoph
> >