RE: core files are host dependent

["Sergey Kamshilin" <Sergey.Kamshilin@radisys.com>]

Daniel,

Thank you for the note - it seems that traces are the same... After
closer look I found that /lib/ld-2.3.4.so are different on both
machines:

Both of them installed from the same package:

[root@aragorn1 ~]# rpm -qf /lib/ld-2.3.4.so
glibc-2.3.4-2.25
[root@legolas1 ~]# rpm -qf /lib/ld-2.3.4.so
glibc-2.3.4-2.25

I have the same kernel version installed:

[root@legolas1 ~]# uname -a
Linux legolas1.lab.convedia.com 2.6.9-11.EL #1 Fri May 20 18:17:57 EDT
2005 i686 i686 i386 GNU/Linux

[root@aragorn1 ~]# uname -a
Linux aragorn1.lab.convedia.com 2.6.9-11.EL #1 Fri May 20 18:17:57 EDT
2005 i686 i686 i386 GNU/Linux

But! 
[root@aragorn1 ~]# rsh legolas1 cat /lib/ld-2.3.4.so | diff -
/lib/ld-2.3.4.so
Binary files - and /lib/ld-2.3.4.so differ

Even if I copy remote ld-2.3.4.so locally and compare, the difference is
scaring - almost in every line...:

[root@aragorn1 ~]# diff <(hexdump -C ld-2.3.4.so) <(hexdump -C
/lib/ld-2.3.4.so) 
2c2
< 00000010  03 00 03 00 01 00 00 00  c0 67 32 00 34 00 00 00
|.........g2.4...|
---
> 00000010  03 00 03 00 01 00 00 00  c0 27 7d 00 34 00 00 00
|.........'}.4...|
4,11c4,11
< 00000030  18 00 15 00 01 00 00 00  00 00 00 00 00 60 32 00
|.............`2.|
< 00000040  00 60 32 00 b4 4d 01 00  b4 4d 01 00 05 00 00 00
|.`2..M...M......|
< 00000050  00 10 00 00 01 00 00 00  a0 5c 01 00 a0 bc 33 00
|.........\....3.|
< 00000060  a0 bc 33 00 9c 07 00 00  54 08 00 00 06 00 00 00
|..3.....T.......|
< 00000070  00 10 00 00 02 00 00 00  14 5f 01 00 14 bf 33 00
|........._....3.|
< 00000080  14 bf 33 00 c0 00 00 00  c0 00 00 00 06 00 00 00
|..3.............|
< 00000090  04 00 00 00 50 e5 74 64  fc 4b 01 00 fc ab 33 00
|....P.td.K....3.|
< 000000a0  fc ab 33 00 5c 00 00 00  5c 00 00 00 04 00 00 00
|..3.\...\.......|
---
> 00000030  18 00 15 00 01 00 00 00  00 00 00 00 00 20 7d 00
|............. }.|
> 00000040  00 20 7d 00 b4 4d 01 00  b4 4d 01 00 05 00 00 00  |.
}..M...M......|
> 00000050  00 10 00 00 01 00 00 00  a0 5c 01 00 a0 7c 7e 00
|.........\...|~.|
> 00000060  a0 7c 7e 00 9c 07 00 00  54 08 00 00 06 00 00 00
|.|~.....T.......|
> 00000070  00 10 00 00 02 00 00 00  14 5f 01 00 14 7f 7e 00
|........._....~.|
> 00000080  14 7f 7e 00 c0 00 00 00  c0 00 00 00 06 00 00 00
|..~.............|
> 00000090  04 00 00 00 50 e5 74 64  fc 4b 01 00 fc 6b 7e 00
|....P.td.K...k~.|
> 000000a0  fc 6b 7e 00 5c 00 00 00  5c 00 00 00 04 00 00 00
|.k~.\...\.......|
............. Etc..

Both are IBM servers, Intel CPUs. One is 2.6GHz another 2.8GHz.
Everything else is the same...

How this could be??? Sorry if it became non gdb community question....

/SergeyK




-----Original Message-----
From: Daniel Jacobowitz [mailto:drow@false.org] 
Sent: Wednesday, July 08, 2009 11:06 AM
To: Sergey Kamshilin
Cc: gdb@sourceware.org
Subject: Re: core files are host dependent

On Wed, Jul 08, 2009 at 10:44:25AM -0700, Sergey Kamshilin wrote:
> Both hosts have identical set of kernel, libraries and other packages 
> installed. Why this could be and how to fix it? Thank you in advance!

Your statement is very unlikely to be accurate :-)

Try running strace -e open on GDB to be absolutely sure what libraries
it's opening.  My first guess would be debug library packages installed
on only one of the hosts.

--
Daniel Jacobowitz
CodeSourcery