With debug option, I compiled a big program called OpenFOAM (Written mainly in c++) on IRIX.
after it is finished, I got a SEGV when I executed it.
Quote:
Segmentation fault (core dump)
I noticed that the core file is quite a big block (800M)!
However, I can get very little information from it. I did:
Quote:
gdb
and then
Quote:
core core
here's the outcome
Quote:
This GDB was configured as "mips-sgi-irix6.5".
(gdb) core core
Core was generated by `wmkdep'.
Program terminated with signal 11, Segmentation fault.
warning: wrong size gregset struct in core file
warning: wrong size gregset struct in core file
#0 0x00000000 in ?? ()
(gdb) bt
#0 0x00000000 in ?? ()
what shall I do now?
what does it mean by saying "wrong size gregset struct in core file", is it fatal?
How can I use core file?
onyx-bridge 12% ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) unlimited
stack(kbytes) 524288
memory(kbytes) 29096416
coredump(blocks) unlimited
nofiles(descriptors) 2500
vmemory(kbytes) unlimited
concurrency(threads) 1024
onyx-bridge 13% blockMesh
Segmentation fault (core dumped)
onyx-bridge 14% gdb
GNU gdb 6.6
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 "mips-sgi-irix6.5".
(gdb) core core
Core was generated by `blockMesh'.
Program terminated with signal 11, Segmentation fault.
warning: wrong size gregset struct in core file
warning: wrong size gregset struct in core file
#0 0x00000000 in ?? ()
(gdb) q
onyx-bridge 15% ls
blockMesh core extrudeMesh
onyx-bridge 16% rm core
onyx-bridge 17% gdb -e blockMesh -c core
GNU gdb 6.6
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 "mips-sgi-irix6.5".
/disk4/usr/people/student3/OpenFOAM/OpenFOAM-1.4.1/applications/utilities/mesh/generation/core: No such file or directory.
(gdb) q
onyx-bridge 18% blockMesh
Illegal instruction (core dumped)
onyx-bridge 19% ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) unlimited
stack(kbytes) 524288
memory(kbytes) 29096416
coredump(blocks) unlimited
nofiles(descriptors) 2500
vmemory(kbytes) unlimited
concurrency(threads) 1024
onyx-bridge 20% gdb -e blockMesh -c core
GNU gdb 6.6
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 "mips-sgi-irix6.5".
warning: shared library handler failed to enable breakpoint
Core was generated by `blockMesh'.
Program terminated with signal 4, Illegal instruction.
You can't do that without a process to debug.
(gdb) bt
You can't do that without a process to debug.
(gdb) core core
warning: shared library handler failed to enable breakpoint
Core was generated by `blockMesh'.
Program terminated with signal 4, Illegal instruction.
You can't do that without a process to debug.
(gdb) q
onyx-bridge 21% gdb blockMesh core
GNU gdb 6.6
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 "mips-sgi-irix6.5"...
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libmeshTools.so...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libmeshTools.so
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libtriSurface.so...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libtriSurface.so
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/liblagrangian.so...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/liblagrangian.so
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libfiniteVolume.so...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libfiniteVolume.so
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libPstream.so...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libPstream.so
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libdynamicMesh.so...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libdynamicMesh.so
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libOpenFOAM.so...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libOpenFOAM.so
Reading symbols from /usr/lib32/libfpe.so...done.
Loaded symbols for /usr/lib32/libfpe.so
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libstdc++.so.6...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libstdc++.so.6
Reading symbols from /usr/lib32/libm.so...done.
Loaded symbols for /usr/lib32/libm.so
Reading symbols from /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libgcc_s.so.1...done.
Loaded symbols for /disk4/usr/people/student3/OpenFOAM/sgiN32/gcc-4.2.1/lib32/libgcc_s.so.1
Reading symbols from /usr/lib32/libc.so.1...done.
Loaded symbols for /usr/lib32/libc.so.1
Reading symbols from /usr/lib32/libz.so...done.
Loaded symbols for /usr/lib32/libz.so
You can't do that without a process to debug.
(gdb) bt
You can't do that without a process to debug.
warning: shared library handler failed to enable breakpoint
Core was generated by `blockMesh'.
Program terminated with signal 4, Illegal instruction.
In fact, there's no problem at all under any linux system, I can use it very well under OpenSUSE, Fedora, or Ubuntu.
No offence V3l0, I mean the answer is not an easy one to have and blockMesh is above reproach.
On sgi-Irix6.5, after a core dump, I was adviced to perform a "strace", but I got the following information:
ERROR: tracer already exists
what shall I do now?
I am justing wandering, dear experts, what is the best way to locate the problem, to diagnose the diseases?
Hi
I am using Linux and I am using Java as well as C++ services running on it.
The ulimit -c is set to around 400Mb.
Whenever any of the service fails they produce a core file.(Actual size of core could be greater than 400Mb).
Whenever my Java service fails I get a core file of size 400Mb... (3 Replies)
Hi
I am using Linux and I have Java as well as C++ services running on it.
The ulimit -c is set to around 400Mb.
Whenever any of the service fails they produce a core file.(Actual size of core could be greater than 400Mb).
Whenever my Java service fails I get a core file of size 400Mb... (1 Reply)
Hi,
Regarding core dump on HP-UX.
more /etc/rc.config.d/savecrash
#!/sbin/sh
# @(#) $Revision: 80.1 $
# Savecrash configuration
#
#
# SAVECRASH: Set to 0 to disable saving system crash dumps.
SAVECRASH=1
# SAVECRASH_DIR:Directory name for system crash dumps. Note: the... (2 Replies)
1. The problem statement, all variables and given/known data:
When looking for corefiles, include any file with core in its name. (Some UNIX/Linux systems add the PID of the process that created the core to reduce the chances of overwriting an already existing core file that might be needed. The... (6 Replies)
hi,
using core file ( stripped version of binary) i'm able to get backtrace. but i'm unable to figure out the root cause by looking at the code.
core file has been generated by SEGV. i'm able to disassemble the functions but i do not know how to interpret it. pls suggest.
thanks, (2 Replies)
Hi All,
May be it is a stupid question, but, I would like to know what is the advantage using a core dump file at the moment of debugging using gdb.
I know a core dump has information about the state of the application when it crashed, but, what is the difference between debugging using the... (2 Replies)
hello all,
I have same core like below:
lsav@GINTINGsmsc1/var/opt/GINTING/cores/SLF $ pstack core
core 'core' of 26799: /opt/GINTING/bin/SLF -poolSize 520000
pstack: warning: librtld_db failed to initialize; symbols from shared libraries will not be available
----------------- lwp# 1 ... (1 Reply)
Hi friends,
Can core file be deleted if there is no need for any one to use it for debugging ?
What should be the setting for a person who has root access to the solaris system ?
thanks in advance
Veera (2 Replies)
Hi folks,
I'm hoping someone would be charitable enough to give me a quick explanation of adb usage for analyzing core files...or point me in the right direction. A search here revealed scant results and web searches are providing me with ambiguous information.
Running Solaris.
Thanks,... (1 Reply)
03-28-2008
How to use core file?
