From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Mike C." <miguelmclara@gmail.com>
Subject: Fwd:  NetBSD xl core-dump not working... Memory fault (core dumped)
Date: Mon, 04 Nov 2013 22:13:59 +0000
Message-ID: <52781C27.2040508@gmail.com>
References: <52770EED.9090804@gmx.de>
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On 31.10.13 04:34, Miguel Clara wrote:

> I was trying to get a core-dump for a domU with xl and got this error:
>
> # xl dump-core 20 test.core
> Memory fault
>
> GDB shows this:
>
> a# gdb xl xl.core
> GNU gdb (GDB) 7.3.1
> Copyright (C) 2011 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later<http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64--netbsd".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /usr/sbin/xl...done.
> [New process 1]
> Core was generated by `xl'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x00007f7ff7007b45 in xc_domain_dumpcore_via_callback
> (xch=0x7f7ff7b0d800, domid=20, args=0x7f7fffffdae0,
> dump_rtn=0x7f7ff700632c<local_file_dump>)
>      at xc_core.c:860
> 860     xc_core.c: No such file or directory.
>          in xc_core.c
>
>
> (gdb) backtrace
> #0  0x00007f7ff7007b45 in xc_domain_dumpcore_via_callback
> (xch=0x7f7ff7b0d800, domid=20, args=0x7f7fffffdae0,
> dump_rtn=0x7f7ff700632c<local_file_dump>)
>      at xc_core.c:860
> #1  0x00007f7ff7007fda in xc_domain_dumpcore (xch=0x7f7ff7b0d800,
> domid=20, corename=0x7f7ffffffe78 "test.core") at xc_core.c:983
> #2  0x00007f7ff74117b3 in libxl_domain_core_dump (ctx=0x7f7ff7b03200,
> domid=20, filename=0x7f7ffffffe78 "test.core", ao_how=<optimized out>)
> at libxl.c:808
> #3  0x000000000040f748 in core_dump_domain (filename=0x7f7ffffffe78
> "test.core", domain_spec=<optimized out>) at xl_cmdimpl.c:3301
> #4  main_dump_core (argc=<optimized out>, argv=0x7f7fffffdca0) at
> xl_cmdimpl.c:3642
> #5  0x0000000000407055 in main (argc=3, argv=0x7f7fffffdca0) at xl.c:267
>

I think, xen-devel is the right list for this.
It's ok to cross-post to keep NetBSD people involved for answering
NetBSD specific questions from the Xen/Citrix people that would
be not answered, otherwise.

Christoph