[jdk21u-dev] RFR: 8350106: [PPC] Avoid ticks_unknown_not_Java AsyncGetCallTrace() if JavaFrameAnchor::_last_Java_pc not set

[Paul Hohensee]

On Tue, 15 Jul 2025 12:55:54 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

> This pull request contains a backport of commit [030c85de](https://github.com/openjdk/jdk/commit/030c85de1376123615e804f98084cb3723205819) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Richard Reingruber on 11 Mar 2025 and was reviewed by Martin Doerr.
> 
> It does not apply because of copyright header differences and because `frame::kind` doesn't exist yet in jdk21u but appears in the context of the changes.
> 
> Risk is low because the patch is small and ppc only. The code is only reached when profiling with jfr or async-profiler.

Marked as reviewed by phh (Reviewer).

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PR Review: https://git.openjdk.org/jdk21u-dev/pull/1971#pullrequestreview-3025826692