Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/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
X-pair-Authenticated: 24.126.73.164
Message-ID: <405D3CEA.3090006@kegel.com>
Date: Sat, 20 Mar 2004 22:57:46 -0800
From: Dan Kegel <dank AT kegel DOT com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040113
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: Minimal test case for Make crash bug
References: <405C00BF DOT 3090507 AT kegel DOT com> <405C06C4 DOT 7030508 AT kegel DOT com> <405C6C4B DOT 90409 AT kegel DOT com> <405C939E DOT 5020909 AT kegel DOT com> <405D1ACD DOT 4060809 AT kegel DOT com>
In-Reply-To: <405D1ACD.4060809@kegel.com>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit

Dan Kegel wrote:
> int main(int argc, char **argv)
> {
>         int i;
>         for (i=0; ; i++) {
>                 int fd = open("foo.c", O_RDONLY);
>                 printf("fd #%d is %d\n", i, fd);
>         }
> }
> 
> This crashes for me at the 133rd fd unless I run it under gdb ...

OK, I built a debugging version of cygwin1.dll and dropped it
on top of the normal one, then ran my test program with
   export CYGWIN=error_start:C:\\cygwin\\bin\\gdb.exe
   ./foo
and hit 'c' and then 'bt' as suggested.  Looks like the
debugger is a bit happier with the debugging build.
I don't have time to look at it tonight, but in case
it makes any sense to you, here's the backtrace.

Thanks,
Dan

Program received signal SIGSEGV, Segmentation fault.
[Switching to thread 660.0x838]
fhandler_base::fhandler_base() (this=0x0)
     at 
../../../../cygwin-snapshot-20040318-1/winsup/cygwin/fhandler.cc:1275
1275    {
Current language:  auto; currently c++
(gdb) bt
#0  fhandler_base::fhandler_base() (this=0x0)
     at 
../../../../cygwin-snapshot-20040318-1/winsup/cygwin/fhandler.cc:1275
#1  0x61031854 in fhandler_disk_file::fhandler_disk_file() (this=0x0)
     at 
../../../../cygwin-snapshot-20040318-1/winsup/cygwin/fhandler_disk_file.cc:379
#2  0x6101e174 in build_fh_pc(path_conv&) (pc=@0x22ec90)
     at ../../../../cygwin-snapshot-20040318-1/winsup/cygwin/fhandler.h:311
#3  0x6101ded8 in build_fh_name(char const*, void*, unsigned, 
suffix_info*) (
     name=0x401050 "foo.c", h=0x0, opt=1, si=0x0)
     at ../../../../cygwin-snapshot-20040318-1/winsup/cygwin/dtable.cc:351
#4  0x61095071 in open (unix_path=0x401050 "foo.c", flags=0)
     at ../../../../cygwin-snapshot-20040318-1/winsup/cygwin/syscalls.cc:550
#5  0x610883cf in _sigfe ()
     at ../../../../cygwin-snapshot-20040318-1/winsup/cygwin/cygserver.h:82
#6  0x00000085 in ?? ()
#7  0xffffffff in ?? ()
#8  0x0022f070 in ?? ()



--
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/