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Date: Fri, 26 Oct 2001 21:42:55 -0400
From: Jason Tishler <jason AT tishler DOT net>
To: Robert Collins <robert DOT collins AT itdomain DOT com DOT au>
Cc: cygwin-developers AT sourceware DOT cygnus DOT com
Subject: Re: fix cond_race... was RE: src/winsup/cygwin ChangeLog thread.cc thread.h ...
Message-ID: <20011026214255.A2232@dothill.com>
Mail-Followup-To: Robert Collins <robert DOT collins AT itdomain DOT com DOT au>,
	cygwin-developers AT sourceware DOT cygnus DOT com
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In-Reply-To: <03e201c15e1c$9bd09d40$0200a8c0@lifelesswks>
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Rob,

On Fri, Oct 26, 2001 at 10:49:09PM +1000, Robert Collins wrote:
> Whats the specific command to invoke the failing test?

You should be good to go -- login using the following:

    $ ssh -p 2222 robertc AT cc1004678-a DOT etntwn1 DOT nj DOT home DOT com

To reproduce the problem, do the following:

    $ cd src/python-2.1.1
    $ PYTHONPATH= ./python.exe -tt Lib/test/regrtest.py -l test_threadedtempfile

You may have to run the python command a few time before it hangs.

Once it hangs, you should see a backtrace in gdb as follows:

(gdb) bt
#0  0x77f82152 in _libkernel32_a_iname ()
#1  0x77e830fe in _libkernel32_a_iname ()
#2  0x77e83126 in _libkernel32_a_iname ()
#3  0x61062b34 in pthread_cond::TimedWait (this=0xa0c76f0, 
    dwMilliseconds=4294967295) at ../../../../src/winsup/cygwin/thread.cc:538
#4  0x61064623 in __pthread_cond_dowait (cond=0xa0c3edc, mutex=0xa0c3ee0, 
    waitlength=-1) at ../../../../src/winsup/cygwin/thread.cc:1769
#5  0x6106475c in pthread_cond_wait (cond=0xa0c3edc, mutex=0xa0c3ee0)
    at ../../../../src/winsup/cygwin/thread.cc:1806
#6  0x61d928ad in PyThread_acquire_lock (lock=0xa0c3ed8, waitflag=1)
    at Python/thread_pthread.h:313
..

I set up a Cygwin CVS sandbox which you can enter using the following:

    $ ce cygwin # the "e" is not a typo

The above will cd you to the right place and set up the necessary
environment variables to access Cygwin CVS.  Let me know if you do a
build and I'll switch the Cygwin DLL as soon as possible.

Thanks,
Jason