RFR: 8262271: SA: Add new stress test that tests getting the stack trace of an active thread [v2]

[Yasumasa Suenaga]

On Tue, 9 Mar 2021 07:17:28 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

>> This a new test that runs jstack on a process that is busy doing things. It runs jstack 4 times as the process is starting up.
>
> Chris Plummer has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use waitFor() instead of destroyForcibly().

Marked as reviewed by ysuenaga (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/2720