X-Spam-Check-By: sourceware.org
Date: Fri, 19 May 2006 22:35:09 -0400 (EDT)
From: Igor Peshansky <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: cygwin AT cygwin DOT com
Subject: Re: cygwin1-20060519: proc_waiter: unknown value * on proc pipe
In-Reply-To: <20060520020637.GA5047@trixie.casa.cgf.cx>
Message-ID: <Pine.GSO.4.63.0605192221450.16587@access1.cims.nyu.edu>
References: <Pine DOT GSO DOT 4 DOT 63 DOT 0605192142000 DOT 16587 AT access1 DOT cims DOT nyu DOT edu>  <20060520020637 DOT GA5047 AT trixie DOT casa DOT cgf DOT cx>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On Fri, 19 May 2006, Christopher Faylor wrote:

> On Fri, May 19, 2006 at 10:01:27PM -0400, Igor Peshansky wrote:
> >Hi,
> >
> >Found a weird problem with the latest CVS (a regression from end February,
> >but I can track it down further, too, if the testcase doesn't help).
> >Compiling the following program:
> >
> >#include <stdio.h>
> >int main() { printf("1\n"); exit(-1); }
> >
> >with "gcc -mno-cygwin" and running it produces the following output:
> >
> >1
> >979250836 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979250894 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979250920 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >979264978 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979265034 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979267613 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >979278806 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979278860 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979278886 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >979289509 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979289568 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979289595 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >979300049 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979300106 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979300411 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >
> >but (!) only in an xterm.  Try as I might, I couldn't reproduce this in
> >rxvt or bash with CYGWIN=tty.  I don't know what the differences are, but
> >there it is.  I did reproduce this in an xterm running tcsh and pdksh (and
> >a perl shell, interestingly enough).  The above testcase was distilled
> >from a huge Java program that exhibited this behavior.
> >
> >Note that 49 is really the character '1', and 13 and 10 are CRLF.  I've
> >also gotten other characters at times, all corresponding to valid messages
> >from the program, printed to either stdout or stderr.  The number of times
> >it repeats also seems to vary -- in some cases it's only once, in others
> >more (it's repeated 5 times above).
>
> I can't duplicate this but, I'm not really interested in this kind of
> problem unless you can duplicate the problem with a cygwin snapshot.
> Otherwise, there is no way of knowing how you've built the DLL or what
> other local mods might be in it.

Sorry, should've mentioned that I can also duplicate this with both the
20060518 and 20060516 snapshots.  Here's 20060518:

$ uname -svr
CYGWIN_NT-5.1 1.5.20s(0.155/4/2) 20060518 22:17:41
$ cygstart xterm -display localhost:0.0

In the xterm:

$ ./testprog
1
      3 [proc_waiter] bash 4908 proc_waiter: unknown value 49 on proc pipe
     74 [proc_waiter] bash 4908 proc_waiter: unknown value 13 on proc pipe
    105 [proc_waiter] bash 4908 proc_waiter: unknown value 10 on proc pipe
  13140 [proc_waiter] bash 4908 proc_waiter: unknown value 49 on proc pipe
[snip]

	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_	    pechtcha AT cs DOT nyu DOT edu | igor AT watson DOT ibm DOT com
ZZZzz /,`.-'`'    -.  ;-;;,_		Igor Peshansky, Ph.D. (name changed!)
     |,4-  ) )-,_. ,\ (  `'-'		old name: Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"Las! je suis sot... -Mais non, tu ne l'es pas, puisque tu t'en rends compte."
"But no -- you are no fool; you call yourself a fool, there's proof enough in
that!" -- Rostand, "Cyrano de Bergerac"

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/