[9] RFR (S): 8059340: ConstantPool::_resolved_references is missing in heap dump

Vladimir Ivanov vladimir.x.ivanov at oracle.com
Mon Sep 29 14:51:08 UTC 2014


VM heap dump doesn't contain ConstantPool::_resolved_references for 
classes which have resolved references.

ConstantPool::_resolved_references points to an Object[] holding 
resolved constant pool entries (patches for VM anonymous classes, linked 
CallSite & MethodType for invokedynamic instructions).

I've decided to use reserved slot in HPROF class header format.
It requires an update in jhat to correctly display new info.

The other approach I tried was to dump the reference as a fake static 
field [1], but storing VM internal ConstantPool::_resolved_references 
among user defined fields looks confusing.

Testing: manual (verified that corresponding arrays are properly linked 
in Nashorn heap dump).


Best regards,
Vladimir Ivanov

[1] http://cr.openjdk.java.net/~vlivanov/8059340/static

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