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Date: Thu, 6 Dec 2007 12:44:38 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.5.24-2: unalbe to get a core Dump file
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On Dec  6 12:01, Corinna Vinschen wrote:
> On Dec  5 23:13, Pedro Alves wrote:
> > Brian Dessent wrote:
> >
> >> As already mentioned downthread, if you want a core dump you should
> >> simply set error_start=c:/cygwin/bin/dumper.exe, modulo dumper bugs
> >> (which should have all been fixed in the latest version.)
> >
> > The cvs version still doesn't work for me if I link
> > it with the distributed bfd -- it crashes in that case.
> > The latest fixes were done with a bfd from cvs.
> >
> > I haven't tried the latest test version, but
> > should have the same problem.
> 
> Do you imply that we need a new binutils package to get dumper working?

I just built dumper with a bfd from CVS HEAD(*).  It seems to work on
the first glance.  Setting error_start as above, it catches the division
by zero from the OP's test app and creates a core file.  However, this
core file doesn't seem to be very helpful, at least when using GDB from
the distro:

(gdb) i thr
  3 process 1984  0x7c95077b in ntdll!KiIntSystemCall ()
   from /mnt/c/WINDOWS/system32/ntdll.dll
  2 process 3020  0x7c90eb94 in ntdll!LdrAccessResource ()
   from /mnt/c/WINDOWS/system32/ntdll.dll
* 1 process 3836  0x7c90eb94 in ntdll!LdrAccessResource ()
   from /mnt/c/WINDOWS/system32/ntdll.dll

None of the backtraces shows anything beyond the system DLLs.

Do we also need a newer GDB for this to be useful?


Corinna


(*) Btw., the new testrelease 1.5.24-4 contains this dumper.exe
    linked against bfd from CVS HEAD.


-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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