RFR: 8342607: Enhance register printing on x86_64 platforms

[Martin Doerr]

On Tue, 22 Oct 2024 11:31:15 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

> Well, with my quick-search I found information like that too. I don't see though, how it helps understand that the printed values are correct.

I think the only way to verify that the printed values are correct is testing it. I'm currently experimenting with setting up XMM values and then crashing intentionally. I can see that my values get printed, but on linux, XMM[0] seems to be always 0 and the other registers off by one. Strange.

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PR Comment: https://git.openjdk.org/jdk/pull/21615#issuecomment-2430107093