From: Lucas Nussbaum <lucas@...>
Date: 2011-07-04T00:16:57+09:00
Subject: [ruby-core:37754] [Ruby 1.8 - Bug #3779] Threading issues on Debian GNU/kFreeBSD


Issue #3779 has been updated by Lucas Nussbaum.


Hi,

I'm surprised this fix wasn't applied, and backported to 1.8.7...
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Bug #3779: Threading issues on Debian GNU/kFreeBSD
http://redmine.ruby-lang.org/issues/3779

Author: Lucas Nussbaum
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: 1.8.7


=begin
 Due to incorrect assumptions on sigprocmask in threaded programs, ruby 1.8 doesn't work well on Debian GNU/kFreeBSD (FreeBSD kernel + GNU Libc).
 This was already fixed in Ruby 1.9.
 
 - in process.c (re-)start timer thread (after_exec) only in parent,
   as in child we know for sure that there is only one thread.
   The fix-up in child is performed slightly later in rb_thread_atfork().
   Also unify linux with rest of the systems.
   In 1.9 series the code is completely reworked.
 
 - in signal.c use pthread_sigmask instead of sigprocmask,
   behaviour of sigprocmask is undefined in threaded programs, as stated in POSIX
   (http://www.opengroup.org/onlinepubs/9699919799/functions/pthread_sigmask.html).
   In 1.9 series the code already uses pthread_sigmask:
 
   Sat Apr 24 00:41:52 2010  Yusuke Endoh  <mame@tsg.ne.jp>
 
         * signal.c: use pthread_sigmask() instead of sigprocmask().
           sigprocmask() is unspecified behavior on multi-thread programs.
           [ruby-core:25217]
 
 For more information, see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=595034
 
 Patch attached. The signal.c part is hackish, and should be done properly in configure. 
 
 Please also backport to 1.8.7.
=end



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