Object header, sync block, thin lock vs fat lock, hashcode – all of this and more will be explained in the following post.
First, let’s make a brief overview on the object header in the CLR.
What is the object header?
An header is – like it sound – header “above” the object.
If I try to illustrate it, it will be like this —->
Every object in CLR has an header that contains
info related to the object. The run -time use this info as we’ll see later in this post.
My Coding Place 