RFR: 8340401: DcmdMBeanPermissionsTest.java and SystemDumpMapTest.java fail with assert(_stack_base != nullptr) failed: Sanity check [v2]

[Kevin Walls]

On Fri, 20 Sep 2024 08:09:53 GMT, Simon Tooke <stooke at openjdk.org> wrote:

>> This PR addresses JDK-8340401 by adding a test for a thread with no stack currently assigned.
>
> Simon Tooke has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8340401: test for thread with uninitialized stack

I tested this update in a local tier1 linux and windows, and in the CI tier3 and tier5 windows where I'm seeing all passes, lots of ZGC usage (which remains a more likely way to trigger this, but not essential).

Simon if this attracts another reviewer, I would be happy to see this go ahead and calm down the CI noise (every tier5 run turns up a few failures).

Like the other test change, if we want to meditate further on it and follow up with a better solution that's great.

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Marked as reviewed by kevinw (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/21091#pullrequestreview-2318194526