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List:       openjdk-serviceability-dev
Subject:    Re: jhsdb jstack does not work with AppCDS
From:       Yasumasa Suenaga <yasuenag () gmail ! com>
Date:       2018-03-26 4:08:40
Message-ID: b49deac4-72ac-88b6-9af5-fad7fe472a00 () gmail ! com
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Thanks Jini,

I will watch JDK-8174994.


Yasumasa


On 2018/03/26 10:39, Jini George wrote:
> Hi Yasumasa,
> 
> This is likely to be due to JDK-8174994 (for which I am working on a fix
> right now, and which I hope to send for review in a day or two).
> 
> Thank you,
> Jini.
> 
> 
> On 3/25/2018 6:46 PM, Yasumasa Suenaga wrote:
> > Hi all,
> > 
> > I tried to get jstack via jhsdb from AppCDS enabled process, but it
> > couldn't as below:
> > 
> > ---------------
> > [ysuenaga at fc27 jdk-hs]$ /usr/local/jdk-10/bin/jhsdb jstack --pid 5614
> > Attaching to process ID 5614, please wait...
> > Debugger attached successfully.
> > Server compiler detected.
> > JVM version is 10+46
> > Deadlock Detection:
> > 
> > sun.jvm.hotspot.types.WrongTypeException: No suitable match for type of
> > address 0x0000000800098690
> > ??????? at
> > jdk.hotspot.agent/sun.jvm.hotspot.runtime.InstanceConstructor.newWrongTypeException(InstanceConstructor.java:62)
> >  
> > ??????? at
> > jdk.hotspot.agent/sun.jvm.hotspot.runtime.VirtualBaseConstructor.instantiateWrapperFor(VirtualBaseConstructor.java:109)
> >  
> > ??????? at
> > jdk.hotspot.agent/sun.jvm.hotspot.oops.Metadata.instantiateWrapperFor(Metadata.java:73)
> >  
> > ??????? at
> > jdk.hotspot.agent/sun.jvm.hotspot.oops.Oop.getKlassForOopHandle(Oop.java:210)
> > 
> > ??????? at
> > jdk.hotspot.agent/sun.jvm.hotspot.oops.ObjectHeap.newOop(ObjectHeap.java:252)
> > 
> > ??????? at
> > jdk.hotspot.agent/sun.jvm.hotspot.runtime.JavaThread.getThreadObj(JavaThread.java:359)
> >  
> > ??????? at
> > jdk.hotspot.agent/sun.jvm.hotspot.runtime.JavaThread.getCurrentParkBlocker(JavaThread.java:411)
> >  
> > ??????? at
> > jdk.hotspot.agent/sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:82)
> >  
> > ?---------------
> > 
> > I attempt to change SA to refer Klass::_archived_mirror, but I got same
> > exceptions.
> > How can I avoid this error?
> > 
> > 
> > Thanks,
> > 
> > Yasumasa
> > 


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