RFR: 8297967: Make frame::safe_for_sender safer [v2]

[Johannes Bechberger]

On Thu, 1 Dec 2022 19:21:54 GMT, Johannes Bechberger <duke at openjdk.org> wrote:

>> Makes frame::safe_for_sender safer by using os::is_readable_pointer to check the location of the return address.
>
> Johannes Bechberger has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Imrove fix, thanks Martin

I converted it back to a draft and look into next week with more vigor.

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PR: https://git.openjdk.org/jdk/pull/11461