RFR: 8299125: UnifiedOopRef in JFR leakprofiler should treat thread local oops correctly [v2]

Tue Jan 3 16:21:48 UTC 2023

On Tue, 3 Jan 2023 14:31:24 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

> > This is introducing some new, very complicated tagging scheme. I don't understand it. What is 0b011 ?
> 
> We have three storage/access types in the vm, Native, Raw, Heap. The two lower bits encode this. The only valid low bits are Heap: 0b00, Native: 0b01 and Raw: 0b10. Then each storage area can be use compressed oops or not. Which is the third bit.
> 
> `0b011` would be an invalid tag.

I see now it is the mask on 32-bit.

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PR: https://git.openjdk.org/jdk/pull/11741