From owner-freebsd-bugs  Tue Apr  6 20:52: 0 1999
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Date: Tue,  6 Apr 1999 20:51:37 -0700 (PDT)
From: bryant@cs.usm.maine.edu
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Subject: bin/10992: pthread_kill() doesn't deliver signals to threads in blocking syscall
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>Number:         10992
>Category:       bin
>Synopsis:       pthread_kill() doesn't deliver signals to threads in blocking syscall
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Apr  6 20:50:00 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:     Nathan Bryant
>Release:        3.1-STABLE
>Organization:
>Environment:
FreeBSD area51.v-wave.com 3.1-STABLE FreeBSD 3.1-STABLE #0: Sat Apr  3 15:03:15 MST 1999     root@area51.v-wave.com:/usr/src/sys/compile/AREA51  i386
>Description:
pthread_kill() doesn't properly dispatch a signal to the specified
thread, if the thread is waiting for a blocking system call.
pthread_kill() will, however, set the pthread->interrupted flag and
set the thread's state to 'running.' The signal is not marked as
pending, however, and the signal handler won't be called. A second call
to pthread_kill() will then dispatch the signal, since the thread has
been marked 'running' by the first call.
>How-To-Repeat:
call pthread_kill() on another thread that is waiting for network I/O;
its signal handler won't be called.
>Fix:
bug can be worked around be calling pthread_kill() twice where it
should only have to be called once.

>Release-Note:
>Audit-Trail:
>Unformatted:


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