PR/44756 CVS commit: src/lib/libpthread

["Christos Zoulas" <christos%netbsd.org@localhost>]

The following reply was made to PR lib/44756; it has been noted by GNATS.

From: "Christos Zoulas" <christos%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/44756 CVS commit: src/lib/libpthread
Date: Fri, 31 Jan 2014 14:22:00 -0500

 Module Name:   src
 Committed By:  christos
 Date:          Fri Jan 31 19:22:00 UTC 2014
 
 Modified Files:
        src/lib/libpthread: pthread_cond.c pthread_mutex.c
 
 Log Message:
 PR/44756: Sad Clouds: Prevent leakage of errno = ESRCH from _lwp_park. This
 has two parts:
        - in pthread_cond_timedwait() if the thread we are trying to unpark
          exited, retry the the _lwp_park call without it.
        - pthread_mutex() was affecting errno since it is calling _lwp_park()
          from pthread_mutex_lock_slow(). preserve the original errno.
 Note that the example problem still causes an occassional deadlock on machines
 with many CPUs and it is the same deadlock we observe with named.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.61 -r1.62 src/lib/libpthread/pthread_cond.c
 cvs rdiff -u -r1.56 -r1.57 src/lib/libpthread/pthread_mutex.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.