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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Mon, 8 Mar 2004 18:53:16 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Rolf Campbell <Endlisnis AT mailc DOT net>
cc: cygwin AT cygwin DOT com
Subject: Re: Snapshot 20040306: make hangs
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Message-ID: <Pine.GSO.4.56.0403081851140.28124@slinky.cs.nyu.edu>
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On Mon, 8 Mar 2004, Rolf Campbell wrote:

> Christopher Faylor wrote:
> > If you want to analyze the strace yourself and offer comment, then
> > please do so.  Sending strace snippets is normally useless.  99% of the
> > time, people send the equivalent of a photo of an accident scene with
> > the thought that the picture will show why the accident occurred, i.e.,
> > the strace snippet is worthless.  I gave up trying to inspect
> > unsolicited strace output a long time ago.
> > cgf
>
> I did notice one pattern after stairing blindly at strace output for a
> while.  Every time it freezes, there is a:
>
>     43 4628798 [sig] make 2064 setup_handler: signal 20 not delivered
>     47 4628845 [sig] make 2064 sigpacket::process: returning 0
>
> very near the end of strace output (last 10 lines).  And on every
> successful run that I've looked at, I see:
>
>     43 6057447 [sig] make 3768 setup_handler: signal 20 delivered
>     41 6057488 [sig] make 3768 sigpacket::process: returning 1
>
> in the last 150 lines of stace output.
>
> What is signal 20 anyway?
>
> I see it get 'not delivered' in the success runs too, but never so close
> to the end (1000's of lines up from the end).
>
> -Rolf

$ kill -l
 1) SIGHUP       2) SIGINT       3) SIGQUIT      4) SIGILL
 5) SIGTRAP      6) SIGABRT      7) SIGEMT       8) SIGFPE
 9) SIGKILL     10) SIGBUS      11) SIGSEGV     12) SIGSYS
13) SIGPIPE     14) SIGALRM     15) SIGTERM     16) SIGURG
17) SIGSTOP     18) SIGTSTP     19) SIGCONT     20) SIGCHLD
21) SIGTTIN     22) SIGTTOU     23) SIGIO       24) SIGXCPU
25) SIGXFSZ     26) SIGVTALRM   27) SIGPROF     28) SIGWINCH
29) SIGLOST     30) SIGUSR1     31) SIGUSR2

Also, there's some discussion on cygwin-patches that might be helpful.
	Igor
-- 
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
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