RFR: 8350111: [PPC] AsyncGetCallTrace crashes when called while handling SIGTRAP

[Richard Reingruber]

On Wed, 26 Feb 2025 08:02:11 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

> I also don't like that we lose so many samples with this current solution.

That worries me too (see pr descr.).
It might be possible to handle this situation better in `frame::safe_for_sender` if we only make sure that the sender pc is not null.
I was worried about the case where sender pc is random but within the code cache. This seems to be handled though in `find_initial_Java_frame`.

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

PR Comment: https://git.openjdk.org/jdk/pull/23641#issuecomment-2684386046