RFR: 8304725: AsyncGetCallTrace can cause SIGBUS on M1

[Thomas Stuefe]

On Wed, 22 Mar 2023 15:57:40 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

> Fixes the issue by transitioning the thread into the WXWrite mode while walking the stack in AsyncGetCallTrace.
> 
> Tested on my M1 mac.

Okay. Though the prospect of async profiler modifying the code cache by walking the stack seems scary.

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Marked as reviewed by stuefe (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13144#pullrequestreview-1353962184