[jdk18] RFR: 8279924: [PPC64, s390] implement frame::is_interpreted_frame_valid checks [v2]

[Martin Doerr]

On Wed, 12 Jan 2022 15:18:00 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> Implement frame::is_interpreted_frame_valid like on other platforms. Only interpreter_frame_initial_sp_offset needed to be replaced because it doesn't exist on these platforms.
>
> Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update Copyright years.

Thanks a lot for reviewing. I just noticed that `interpreter_frame_initial_sp_offset`on other platforms is negative. So, my replacement for it uses the wrong sign. I need to fix that and retest.

-------------

PR: https://git.openjdk.java.net/jdk18/pull/96