RFR: 8295872: [PPC64] JfrGetCallTrace: Need pc == nullptr check before frame constructor

[Matthias Baesken]

On Tue, 25 Oct 2022 10:36:34 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> The check pc == nullptr is needed before the frame constructor.

JavaThread::pd_last_frame()  is now unused on the ppc64 platforms, is that correct ? Should there be some guarantee or assertion  in JavaThread::pd_last_frame()  before return frame(sp, pc);  too ?

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PR: https://git.openjdk.org/jdk/pull/10846