instanceKlass

//  instanceKlass layout:
//    [header                     ] klassOop
//    [klass pointer              ] klassOop
//    [C++ vtbl pointer           ] Klass
//    [subtype cache              ] Klass
//    [instance size              ] Klass
//    [java mirror                ] Klass
//    [super                      ] Klass
//    [access_flags               ] Klass
//    [name                       ] Klass
//    [first subklass             ] Klass
//    [next sibling               ] Klass
//    [array klasses              ]
//    [methods                    ]
//    [local interfaces           ]
//    [transitive interfaces      ]
//    [number of implementors     ]
//    [implementors               ] klassOop[2]
//    [fields                     ]
//    [constants                  ]
//    [class loader               ]
//    [protection domain          ]
//    [signers                    ]
//    [source file name           ]
//    [inner classes              ]
//    [static field size          ]
//    [nonstatic field size       ]
//    [static oop fields size     ]
//    [nonstatic oop maps size    ]
//    [has finalize method        ]
//    [deoptimization mark bit    ]
//    [initialization state       ]
//    [initializing thread        ]
//    [Java vtable length         ]
//    [oop map cache (stack maps) ]
//    [EMBEDDED Java vtable             ] size in words = vtable_len
//    [EMBEDDED static oop fields       ] size in words = static_oop_fields_size
//    [         static non-oop fields   ] size in words = static_field_size - static_oop_fields_size
//    [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size

参数资料

[1]. openjdk-6-src-b20-21_jun_2010.tar.gz