06-11-2001
Any UNIX process can 'core dump', however only the kernel process 'panics'.
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1. UNIX for Dummies Questions & Answers
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)
Discussion started by: hassan2
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2. UNIX for Advanced & Expert Users
Hi All,
i am new to this forum.i want detail of reading the core file and trace the problem because of what the program get crashed.please help me.if any body knows any website or tutoril plese let me know.
sudhir (6 Replies)
Discussion started by: sudhir patnaik
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Hi All
I am new for this forum. I have a core file by using gdb and bt cmd I got the function name but I want to the exact cause of the core dump because of I can not reproduse the binary so if any one know the cmd plz plz plz let me know. (0 Replies)
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Hello all,
Iam new to unix while executing java program which finely working in windows know iam testing with unix ,but in unix while executing iam getting core dump, my application is in client server environment and it is menu drivrn application on clicking options no problem but after some time... (1 Reply)
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5. AIX
My application gives core dump. When i am debugging with dbx getting instructions below:
pthdb_session.c, 818: 695445 PTHDB_INTERNAL (internal error)
pthreaded.c, 1941: PTHDB_INTERNAL (internal error)
Illegal instruction (illegal opcode) in . at 0x0
warning: Unable to access address 0x0... (1 Reply)
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6. AIX
Hi,
Is there an option to disable saving of system dump when a user invokes a kernel panic
using sysdumpstart command.
Also, is there any other way of invoking a kernel panic other than using
sysdumpstart?
Thanks,
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Discussion started by: kanna_geekworkz
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Hi ,
I want to read core dump file on AIX5.3. While i am trying to use following commands, i am getting only few lines of information.
ux201p3:e46123> dbx capsWrkstnMgr core
Type 'help' for help.
reading symbolic information ...
Segmentation fault in malloc_common.extend_brk at... (1 Reply)
Discussion started by: rps
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my progrme complaints 'Segmentation fault'.
How to let it print 'Segmentation fault(core dumped)' and generate core dump file?
$ulimit
unlimited (22 Replies)
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9. HP-UX
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)
Discussion started by: messi777
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10. Solaris
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)
Discussion started by: cjashu
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LEARN ABOUT FREEBSD
savecore
SAVECORE(8) BSD System Manager's Manual SAVECORE(8)
NAME
savecore -- save a core dump of the operating system
SYNOPSIS
savecore -c [-v] [device ...]
savecore -C [-v] [device ...]
savecore [-fkvz] [-m maxdumps] [directory [device ...]]
DESCRIPTION
The savecore utility copies a core dump into directory, or the current working directory if no directory argument is given, and enters a
reboot message and information about the core dump into the system log.
The options are as follows:
-C Check to see if a dump exists, and display a brief message to indicate the status. An exit status of 0 indicates that a dump is
there, 1 indicates that none exists. This option is compatible only with the [-v] option.
-c Clear the dump, so that future invocations of savecore will ignore it.
-f Force a dump to be taken even if either the dump was cleared or if the dump header information is inconsistent.
-k Do not clear the dump after saving it.
-m maxdumps Maximum number of dumps to store. Once the number of stored dumps is equal to maxdumps the counter will restart from 0.
-v Print out some additional debugging information. Specify twice for more information.
-z Compress the core dump and kernel (see gzip(1)).
The savecore utility looks for dumps on each device specified by the device argument(s), or on each device in /etc/fstab marked as ``dump''
or ``swap''. The savecore utility checks the core dump in various ways to make sure that it is complete. If it passes these checks, it
saves the core image in directory/vmcore.# and information about the core in directory/info.#. For kernel textdumps generated with the
textdump(4) facility, output will be stored in the tar(5) format and named directory/textdump.tar.#. The ``#'' is the number from the first
line of the file directory/bounds, and it is incremented and stored back into the file each time savecore successfully runs.
The savecore utility also checks the available disk space before attempting to make the copies. If there is insufficient disk space in the
file system containing directory, or if the file directory/minfree exists and the number of free kilobytes (for non-superusers) in the file
system after the copies were made would be less than the number in the first line of this file, the copies are not attempted.
If savecore successfully copies the kernel and the core dump, the core dump is cleared so that future invocations of savecore will ignore it.
The savecore utility is meant to be called near the end of the initialization file /etc/rc (see rc(8)).
SEE ALSO
gzip(1), getbootfile(3), textdump(4), tar(5), dumpon(8), syslogd(8)
HISTORY
The savecore utility appeared in 4.1BSD.
Support for kernel textdumps appeared in FreeBSD 7.1.
BUGS
The minfree code does not consider the effect of compression or sparse files.
BSD
December 17, 2012 BSD