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Posted to commits@harmony.apache.org by "weldon washburn (JIRA)" <ji...@apache.org> on 2007/03/04 22:41:50 UTC
[jira] Assigned: (HARMONY-3272) [drlvm][thread] DRLVM hangs on
stopping deadlocked daemon threads
[ https://issues.apache.org/jira/browse/HARMONY-3272?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
weldon washburn reassigned HARMONY-3272:
----------------------------------------
Assignee: weldon washburn
> [drlvm][thread] DRLVM hangs on stopping deadlocked daemon threads
> -----------------------------------------------------------------
>
> Key: HARMONY-3272
> URL: https://issues.apache.org/jira/browse/HARMONY-3272
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Reporter: Salikh Zakirov
> Assigned To: weldon washburn
> Priority: Minor
> Attachments: NoShutdown.java
>
>
> In order to be able safely release resources on VM shutdown, DRLVM tries to stop all remaining running daemon threads.
> The stopping algorithm cannot terminate deadlocked threads, i.e. threads blocked on MONITORENTER instruction,
> if monitors are fat (i.e. MONITORENTER eventually translates to EnterCriticalSection on Windows, or pthread_mutex_lock on Linux).
> The attached test NoShutdown.java demonstrates the behaviour.
> The possible solution is to use OS-level suspension / signals to suspend daemon threads, without necessarily terminating them,
> because the original purpose is to prevent them from running simultaneously with VM shutdown sequence.
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