Could ObjectSizeCalculator.java supported in other JVMs besides HotSpot-JVM?

[leesf]

Now ObjectSizeCalculator.java could not work in other JVMs, such as IBM JVM, see here, are there any solutions or sugguestions to implement a new one in other JVMs? Thanks

[DavisBroda]

For the IBM JVM specifically, watch out for packed objects, which remove object headers entirely for some objects. Likely complicates the memory model a bit.

https://www.ibm.com/support/knowledgecenter/SSYKE2_7.1.0/com.ibm.java.lnx.71.doc/user/packed_developing.html

[DanHeidinga]

PackedObject support was a tech preview feature that has been removed from the JVM. No need to worry about it as it's never been supported.

[vinothchandar]

Wondering if its easy to extend support for IBM JVM