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

[Tyler Steele]

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.

I just ran a build & the tier1 tests on Linux/s390x. With the exception of UnsafeCopyMemory, which I have seen failing elsewhere, all tests are passing.

I am still getting to know the project and the specifics of stack frames for the ppc64 and s390x architectures, so I'll defer reviewing to someone with more experience. That said, these checks look reasonable from my perspective.

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