[jira] Commented: (HARMONY-1816) [DRLVM] drlvm counts non daemon threads incorrectly

["Elena Semukhina (JIRA)" <ji...@apache.org>]

    [ http://issues.apache.org/jira/browse/HARMONY-1816?page=comments#action_12441926 ] 
            
Elena Semukhina commented on HARMONY-1816:
------------------------------------------

I tried the patch together with HARMONY-1592 and HARMONY-1823.
They eiminate recent classlib tests pass rate degradation.
drlvm smoke, cunit, kernel pass.

> [DRLVM] drlvm counts non daemon threads incorrectly
> ---------------------------------------------------
>
>                 Key: HARMONY-1816
>                 URL: http://issues.apache.org/jira/browse/HARMONY-1816
>             Project: Harmony
>          Issue Type: Bug
>            Reporter: Nikolay Kuznetsov
>         Attachments: HARMONY-1816.patch, Test1.java
>
>
> There are several problems with non demon(those which vm should wait before destroing itself) threads counting in drlvm:
> 1. Non daemon threads count being increased by the thread being run
> This leads to the problem that main thread may finish w/o waiting for the child non-daemon thread;
> 2. Main thread waiting while number of non daemon threads will be equal to zero, while the main thread itself also non daemon thread
> (waiting method checks at enter that thread count should be <= 1, but waits on condition while count ==0)
> Basically this causes vm to hang at shutdown if child thread works longer than main method.

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