RFR: 8275775: Add jcmd VM.classes to print details of all classes [v6]

[Yi Yang]

> Add VM.classes to print details of all classes, output looks like:
> 
> 1. jcmd VM.classes
> 
> KlassAddr Size State Flags LoaderName ClassName
> 0x0000000800c0b400 62 inited W bootstrap java.lang.invoke.LambdaForm$MH/0x0000000800c0b400
> 0x0000000800c0b000 62 inited W bootstrap java.lang.invoke.LambdaForm$DMH/0x0000000800c0b000
> 0x0000000800c0ac00 62 inited W bootstrap java.lang.invoke.LambdaForm$MH/0x0000000800c0ac00
> ...
> 
> 2. jcmd VM.classes verbose
> 
> KlassAddr Size State Flags LoaderName ClassName
> 0x0000000800c0b400 62 inited W bootstrap java.lang.invoke.LambdaForm$MH/0x0000000800c0b400
> java.lang.invoke.LambdaForm$MH/0x0000000800c0b400 {0x0000000800c0b400}
>  - instance size: 2
>  - klass size: 62
>  - access: final synchronized
>  - state: inited
>  - name: 'java/lang/invoke/LambdaForm$MH+0x0000000800c0b400'
>  - super: 'java/lang/Object'
>  - sub:
>  - arrays: NULL
>  - methods: Array<T>(0x00007f620841f210)
>  - method ordering: Array<T>(0x0000000800a7e5a8)
>  - default_methods: Array<T>(0x0000000000000000)
>  - local interfaces: Array<T>(0x00000008005af748)
>  - trans. interfaces: Array<T>(0x00000008005af748)
>  - constants: constant pool [41] {0x00007f620841f030} for 'java/lang/invoke/LambdaForm$MH+0x0000000800c0b400' cache=0x00007f620841f380
>  - class loader data: loader data: 0x00007f61c804a690 of 'bootstrap' has a class holder
>  - source file: 'LambdaForm$MH'
>  - class annotations: Array<T>(0x0000000000000000)
>  - class type annotations: Array<T>(0x0000000000000000)
>  - field annotations: Array<T>(0x0000000000000000)
>  - field type annotations: Array<T>(0x0000000000000000)
>  - inner classes: Array<T>(0x00000008005af6d8)
>  - nest members: Array<T>(0x00000008005af6d8)
>  - permitted subclasses: Array<T>(0x00000008005af6d8)
>  - java mirror: a 'java/lang/Class'{0x000000011f4b3968} = 'java/lang/invoke/LambdaForm$MH+0x0000000800c0b400'
>  - vtable length 5 (start addr: 0x0000000800c0b5b8)
>  - itable length 2 (start addr: 0x0000000800c0b5e0)
>  - ---- static fields (1 words):
>  - static final '_D_0' 'Ljava/lang/invoke/LambdaForm;' @112
>  - ---- non-static fields (0 words):
>  - non-static oop maps:
> 0x0000000800c0b000 62 inited W bootstrap java.lang.invoke.LambdaForm$DMH/0x0000000800c0b000
> java.lang.invoke.LambdaForm$DMH/0x0000000800c0b000 {0x0000000800c0b000}
>  - instance size: 2
>  - klass size: 62
>  - access: final synchronized
>  - state: inited
>  - name: 'java/lang/invoke/LambdaForm$DMH+0x0000000800c0b000'
>  - super: 'java/lang/Object'
>  - sub:
>  - arrays: NULL
>  - methods: Array<T>(0x00007f620841ea68)
>  - method ordering: Array<T>(0x0000000800a7e5a8)
>  - default_methods: Array<T>(0x0000000000000000)
>  - local interfaces: Array<T>(0x00000008005af748)
>  - trans. interfaces: Array<T>(0x00000008005af748)
>  - constants: constant pool [49] {0x00007f620841e838} for 'java/lang/invoke/LambdaForm$DMH+0x0000000800c0b000' cache=0x00007f620841ebe0
>  - class loader data: loader data: 0x00007f61c804a750 of 'bootstrap' has a class holder
>  - source file: 'LambdaForm$DMH'
>  - class annotations: Array<T>(0x0000000000000000)
>  - class type annotations: Array<T>(0x0000000000000000)
>  - field annotations: Array<T>(0x0000000000000000)
>  - field type annotations: Array<T>(0x0000000000000000)
>  - inner classes: Array<T>(0x00000008005af6d8)
>  - nest members: Array<T>(0x00000008005af6d8)
>  - permitted subclasses: Array<T>(0x00000008005af6d8)
>  - java mirror: a 'java/lang/Class'{0x000000011f4b0968} = 'java/lang/invoke/LambdaForm$DMH+0x0000000800c0b000'
>  - vtable length 5 (start addr: 0x0000000800c0b1b8)
>  - itable length 2 (start addr: 0x0000000800c0b1e0)
>  - ---- static fields (1 words):
>  - static final '_D_0' 'Ljava/lang/invoke/LambdaForm;' @112
>  - ---- non-static fields (0 words):
> ...

Yi Yang has updated the pull request incrementally with one additional commit since the last revision:

  fix

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7105/files
  - new: https://git.openjdk.java.net/jdk/pull/7105/files/b4da2ddc..4d2538be

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7105&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7105&range=04-05

  Stats: 12 lines in 3 files changed: 6 ins; 4 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7105.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7105/head:pull/7105

PR: https://git.openjdk.java.net/jdk/pull/7105