I've got a core dump in my weblogic home directory, which i have tried to debug by initiating savecore from /etc/init.d/savecore start
but savecore failed to create the two files, that is vmcore.n and vmunix.n.
savecore is enable on my server to save vmcore and vmunix in /var/crash/hostname
1)... (4 Replies)
Hi All,
is there any way to find out the optimal/would be size of the cor dump file generated by the system while a process got terminated abnormally?
Basically we have been asked to provide the size of the core dump file being generated by the administrators who maintained the UNIX boxes.... (4 Replies)
by what name does a core dump file stored???
like i wrote a test code:
//dump.c
main()
{
char *p=NULL;
printf("%s",p);
}
of course the above code will produce a segmentation fault. but i cant see any file named core in my CWD. am using SUN0S 5.9 (6 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)
Hi Guys,
I was wondering if somebody could give me a link to a very good source of information or document about core dump process and How to's about it. I have also googled it and found some articles myself.
Thanks
Messi (1 Reply)
Hi,
I have got core dump stating "core.bash.29846" so i am unable to open.
How to open the core dump file for further analysis?
Reagards
Vanitha (7 Replies)
Hi guys,
just want to know which core file pattern is best to set for core dumps:
1) per-process file name pattern
or
2) global file name pattern.
I will really appreciate an explanation why the chosen one is better.
Thanks a lot guys. (2 Replies)
I am new to UNIX.
My Application is using c (.so files) and Java code.
My application crashes and CORE DUMP file is generated ,which is huge.
Now I want to view the CORE DUMP file to debug the application using dbx without starting process again.
By only using the CORE DUMP file and dbx ,can i... (1 Reply)
Discussion started by: satde
1 Replies
LEARN ABOUT LINUX
pivot_root
PIVOT_ROOT(8) Maintenance Commands PIVOT_ROOT(8)NAME
pivot_root - change the root file system
SYNOPSIS
pivot_root new_root put_old
DESCRIPTION
pivot_root moves the root file system of the current process to the directory put_old and makes new_root the new root file system. Since
pivot_root(8) simply calls pivot_root(2), we refer to the man page of the latter for further details.
Note that, depending on the implementation of pivot_root, root and cwd of the caller may or may not change. The following is a sequence for
invoking pivot_root that works in either case, assuming that pivot_root and chroot are in the current PATH:
cd new_root
pivot_root . put_old
exec chroot . command
Note that chroot must be available under the old root and under the new root, because pivot_root may or may not have implicitly changed the
root directory of the shell.
Note that exec chroot changes the running executable, which is necessary if the old root directory should be unmounted afterwards. Also
note that standard input, output, and error may still point to a device on the old root file system, keeping it busy. They can easily be
changed when invoking chroot (see below; note the absence of leading slashes to make it work whether pivot_root has changed the shell's
root or not).
EXAMPLES
Change the root file system to /dev/hda1 from an interactive shell:
mount /dev/hda1 /new-root
cd /new-root
pivot_root . old-root
exec chroot . sh <dev/console >dev/console 2>&1
umount /old-root
Mount the new root file system over NFS from 10.0.0.1:/my_root and run init:
ifconfig lo 127.0.0.1 up # for portmap
# configure Ethernet or such
portmap # for lockd (implicitly started by mount)
mount -o ro 10.0.0.1:/my_root /mnt
killall portmap # portmap keeps old root busy
cd /mnt
pivot_root . old_root
exec chroot . sh -c 'umount /old_root; exec /sbin/init'
<dev/console >dev/console 2>&1
SEE ALSO chroot(1), mount(8), pivot_root(2), umount(8)AVAILABILITY
The pivot_root command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
Linux Feb 23, 2000 PIVOT_ROOT(8)