oop klass

https://www.infoq.com/articles/Introduction-to-HotSpot

借助HotSpot SA来一窥PermGen上的对象

找出栈上的指针/引用

虚拟机随谈（一）：解释器，树遍历解释器，基于栈与基于寄存器，大杂烩

http://rednaxelafx.iteye.com/blog/730461

Mirrors: Design Principles for Meta-level Facilities of Object-Oriented Programming Languages。

http://cr.openjdk.java.net/~jrose/pres/200910-VMIL.pdf

https://en.wikipedia.org/wiki/Virtual_method_table

http://www.slideshare.net/cnbailey/memory-efficient-java

http://www.sczyh30.com/posts/Java/jvm-klass-oop/

http://www.th7.cn/Program/java/201607/918500.shtml

http://hg.openjdk.java.net/jdk7u/jdk7u/hotspot/file/5b9a416a5632/src/share/vm/oops/klassOop.hpp

http://hg.openjdk.java.net/jdk7u/jdk7u/hotspot/file/5b9a416a5632/src/share/vm/oops

https://yq.aliyun.com/articles/20279