[bug #35263] libobjc2 can enter a deadlock during dtable initialization

[Morten Hustveit]

URL:
  <http://savannah.gnu.org/bugs/?35263>

                 Summary: libobjc2 can enter a deadlock during dtable
initialization
                 Project: GNUstep
            Submitted by: mortenhustveit
            Submitted on: Sat 07 Jan 2012 05:00:19 PM GMT
                Category: Libraries
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

`dtable_for_class' contains some logic for waiting for an `initialize' call in
another thread.  This seems to break when the other thread is similarly
waiting for us.

I have attached a test-case which reproduces this behavior on every run on my
computer using revision 28758 on GNU/Linux.  I have also attached the Helgrind
log of a single run.



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File Attachments:


-------------------------------------------------------
Date: Sat 07 Jan 2012 05:00:19 PM GMT  Name: libobjc2-deadlock.m  Size: 781B  
By: mortenhustveit

<http://savannah.gnu.org/bugs/download.php?file_id=24758>
-------------------------------------------------------
Date: Sat 07 Jan 2012 05:00:19 PM GMT  Name: helgrind.txt  Size: 17kB   By:
mortenhustveit

<http://savannah.gnu.org/bugs/download.php?file_id=24759>

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