wandrewchan
wandrewchan
/ ObjectHeader32.txt
Created
September 9, 2021 13:45
— forked from arturmkrtchyan/ObjectHeader32.txt
Java Object Header
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| |----------------------------------------------------------------------------------------|--------------------| | |
| | Object Header (64 bits) | State | | |
| |-------------------------------------------------------|--------------------------------|--------------------| | |
| | Mark Word (32 bits) | Klass Word (32 bits) | | | |
| |-------------------------------------------------------|--------------------------------|--------------------| | |
| | identity_hashcode:25 | age:4 | biased_lock:1 | lock:2 | OOP to metadata object | Normal | | |
| |-------------------------------------------------------|--------------------------------|--------------------| | |
| | thread:23 | epoch:2 | age:4 | biased_lock:1 | lock:2 | OOP to metadata object | Biased | | |
| |-------------------------------------------------------|--------------------------------|--------------------| | |
| | |