jhsdb jstack does not work with AppCDS

[Jini George]

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
>