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

[Martin Doerr]

On Tue, 12 Apr 2022 16:38:11 GMT, Johannes Bechberger <duke at openjdk.java.net> wrote:

> Fix the assertion by replacing it by assertion that does not fail.

Fix looks good (but I'm biased). A short comment would be helpful explaining that the async profiler can intercept and make the stack walkable just before the assert.

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