On Fri, 28 Jan 2022 07:34:21 GMT, Chris Plummer <cjplum...@openjdk.org> wrote:

> The test does a "threadcontext -v -a", and from the following output 
> determines the threadID of the SteadyStateThread:
> 
>   `Thread "SteadyStateThread" id=23 Address=0x000001dc51749420`
> 
> It then tries threadcontext on this id, but it fails:
> 
> 
>  + threadcontext -v 23
> Couldn't find thread 23 
> 
> 
> This only happens on Windows. It turns out that each time you attach on 
> Window, the threadID for a thread can change. Some added diagnostic output 
> showed that for the SteadyStateThread, it changed from 23 to 20, and there is 
> no thread with an ID of 23.
> 
> The only way to make this this part of the test work Windows as expected is 
> to parse the output of "threadcontext -v -a" without first doing a detach, 
> and then doing the "threadcontext -v 23" without having to attach again. 
> Unfortunately the test infrastructure for Clhsdb tests (and specifically 
> ClhsdbLauncher) don't make this easy to do this. You can't easily see the 
> output without first detaching, and then attach again on the next command. 
> For this reason I've chosen to not verify the output of the "threadcontext -v 
> <id>" part of the test when running on Windows. ClhsdbLauncher will still do 
> the normal checks to make sure no exceptions or errors are present in the 
> output.

Looks okay to me.
Thanks,
Serguei

-------------

Marked as reviewed by sspitsyn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/7259

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