[j-nsp] Debug vmcore files

[Scott T. Cameron]

Here's an example below.  You'll either need to use gdb on the box itself,
or get/xcompile a powerpc-freebsd gdb.

Again, without source, you're not going to get far.

% tar zvxf /var/tmp/chassisd.core-tarball.4.tgz
chassisd.core.4.gz
juniper.conf.gz
messages
chassisd.info.4
juniper.conf.1.gz
% gzip -d chassisd.core.4.gz
% gdb /usr/sbin/chassisd chassisd.core.4
GNU gdb 6.5 [juniper_2006a_411]
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "powerpc-specifix.com-freebsd"...(no debugging
symbols found)

Reading symbols from /usr/lib/libddl-access.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libddl-access.so.1
Reading symbols from /usr/lib/libjipc.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libjipc.so.1
Reading symbols from /usr/lib/libberkeley-db.so.4...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libberkeley-db.so.4
Reading symbols from /usr/lib/libthr.so.2...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libthr.so.2
Reading symbols from /usr/lib/libisc.so.2...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libisc.so.2
Reading symbols from /usr/lib/libkvm.so.3...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkvm.so.3
Reading symbols from /usr/lib/libfasic.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libfasic.so.1
Reading symbols from /usr/lib/libhsl2.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libhsl2.so.1
Reading symbols from /usr/lib/libcmb.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libcmb.so.1
Reading symbols from /usr/lib/libcnh.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libcnh.so.1
Reading symbols from /usr/lib/libjpci.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libjpci.so.1
Reading symbols from /usr/lib/libm.so.4...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libm.so.4
Reading symbols from /usr/lib/libfabric2.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libfabric2.so.1
Reading symbols from /usr/lib/libfabric1.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libfabric1.so.1
Reading symbols from /usr/lib/libprovider.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libprovider.so.1
Reading symbols from /usr/lib/libiic.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libiic.so.1
Reading symbols from /usr/lib/libcam.so.3...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libcam.so.3
Reading symbols from /usr/lib/libsbuf.so.3...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libsbuf.so.3
Reading symbols from /usr/lib/libutil.so.5...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libutil.so.5
Reading symbols from /usr/lib/libgcc.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libgcc.so.1
Reading symbols from /usr/lib/libc.so.6...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libc.so.6
Reading symbols from /usr/libexec/ld-elf.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/libexec/ld-elf.so.1
Core was generated by `chassisd'.
Program terminated with signal 6, Aborted.
#0  0x42683428 in kill () from /usr/lib/libc.so.6
[New Thread 0x2057000 (LWP 100110)]
(gdb) bt
#0  0x42683428 in kill () from /usr/lib/libc.so.6
#1  0x421d8a30 in raise () from /usr/lib/libthr.so.2
#2  0x42681e88 in abort () from /usr/lib/libc.so.6
#3  0x01c00c64 in vlogging_event ()
#4  0x01c00af4 in vlogging ()
#5  0x01c00ce4 in logging ()
#6  0x01ab9670 in pic_clean_init ()
#7  0x01a16308 in mcontrol_check_backup_active ()
#8  0x01a16e20 in msm_exec ()
#9  0x01a17b2c in mcontrol_init ()
#10 0x019365e4 in ch_init ()
#11 0x01938640 in ch_a2_fru_map_set_context ()
#12 0x01ab3620 in allocadupx ()
#13 0x01ab44bc in main ()
(gdb) x 0x01a16308
0x1a16308 <mcontrol_check_backup_active+364>:   0x3d200201

On Tue, Mar 1, 2011 at 7:29 AM, meryem Z <meryem_z at hotmail.com> wrote:

>  You mean kgdb i guess. this tool is available on juniper routers on
> /var/bin.
> I'm wondering if anyone has tested it before ?
>
>
> Thank you.
>
>
>
>
>
> > From: routehero at gmail.com
> > Date: Tue, 1 Mar 2011 07:21:58 -0500
> > To: juniper-nsp at puck.nether.net
> > Subject: Re: [j-nsp] Debug vmcore files
>
> >
> > You could use gdb. But the likelihood of any success without source code
> is
> > slim.
> >
> > You're better off sending them to jtac.
> >
> > On Tue, Mar 1, 2011 at 6:36 AM, meryem Z <meryem_z at hotmail.com> wrote:
> >
> > >
> > > Hello community,
> > >
> > > Is there any tool to debug vmcore files generated on an m-series
> juniper
> > > router ?
> > >
> > >
> > > Thanks.
> > >
> > >
> > >
> > > _______________________________________________
> > > juniper-nsp mailing list juniper-nsp at puck.nether.net
> > > https://puck.nether.net/mailman/listinfo/juniper-nsp
> > >
> > _______________________________________________
> > juniper-nsp mailing list juniper-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/juniper-nsp
>