RFR: 8282477: [x86, aarch64] vmassert(_last_Java_pc == NULL, "already walkable"); fails with async profiler [v5]

[Dean Long]

On Tue, 3 May 2022 07:36:55 GMT, Johannes Bechberger <duke at openjdk.java.net> wrote:

>> Fix the assertion by replacing it by assertion that does not fail.
>
> Johannes Bechberger has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove two superfluous assertions

OK, this looks good.  I had to refresh my memory on why I changed this code in 8161598.  In retrospect, I think having anchor frames always walkable by always storing a valid last_Java_pc would greatly simplify things, and I doubt any performance difference would be measurable.

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Marked as reviewed by dlong (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/8209