[jira] [Comment Edited] (TS-4890) shutdown_event_system doesn't have lock even though referenced by multiple threads

["Masato Gosui (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-4890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15515929#comment-15515929 ] 

Masato Gosui edited comment on TS-4890 at 9/23/16 9:40 AM:
-----------------------------------------------------------

As we cannot use pthread_mutex_unlock() in signal handler, the most reasonable solution might be to change the type of shutdown_event_system to "volatile sig_atomic_t".

We need to make the variable both thread-safe and signal-safe.


was (Author: mgosui):
As we cannot use pthread_mutex_unlock in signal handler, the most reasonable solution might be to change the type of shutdown_event_system to "volatile sig_atomic_t".

> shutdown_event_system doesn't have lock even though referenced by multiple threads
> ----------------------------------------------------------------------------------
>
>                 Key: TS-4890
>                 URL: https://issues.apache.org/jira/browse/TS-4890
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: Core
>            Reporter: Masato Gosui
>
> Global variable shutdown_event_system (declared in iocore/eventsystem/UnixEThread.cc) doesn't have lock even though the variable can be referenced by multiple threads (e.g. threads executing Thread::execute()).



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