On Sat, 27 Jun 2026 04:03:56 GMT, Chris Plummer <[email protected]> wrote:

> What happens if the core was generated on a machine with PAC support but 
> debugged on a machine without it. Is _pac_mask going to be setup in that case?

`_pac_mask` would be exposed via VMStructs, so we can use it in SA when we 
attach the core. Then we can unwind call stacks on PAC-disabled machine.

For unwinding, we need to restore caller PC by AND operation with `_pac_mask`. 
So it is ok to know just `_pac_mask` as a bitmask.

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PR Review Comment: https://git.openjdk.org/jdk/pull/31669#discussion_r3486222816

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