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1. 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
2 Replies
2. UNIX for Dummies Questions & Answers
my progrme complaints 'Segmentation fault'.
How to let it print 'Segmentation fault(core dumped)' and generate core dump file?
$ulimit
unlimited (22 Replies)
Discussion started by: vistastar
22 Replies
3. AIX
hi,
i am getting core dump while running my broadcast program.while debbuging with dbx it gives....
Segmentation fault in lzo1z_decompress at 0x10003850 ($t1)
0x10003850 (lzo1z_decompress+0x1d0) 98640000 stb r3,0x0(r4)
(dbx) where
lzo1z_decompress(0x2ff21884, 0x2020,... (1 Reply)
Discussion started by: ajaysahoo
1 Replies
4. UNIX for Advanced & Expert Users
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)
Discussion started by: vinp
1 Replies
5. UNIX for Dummies Questions & Answers
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)
Discussion started by: gyanusoni
0 Replies
6. Programming
MY friends:
my program under sco unix have a problem?
it create a core dump file on the path when execute program ,
but i can't find the error of the C program ,i don't know how to
see the error about my program use core, please help me
or give me some suggest and what tools can use... (1 Reply)
Discussion started by: zhaohaizhou
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7. 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
4 Replies
8. UNIX for Dummies Questions & Answers
Hi ,
Working on AIX 4.3. An internal error from my apps engine suddenly causes the engine to die. During this time i do notice a core file being dumped in the directory from where I try to re-start my engine.
Q is how does one read this core file, or I should say 'what is this core file'?
thnx (2 Replies)
Discussion started by: buRst
2 Replies
9. UNIX for Dummies Questions & Answers
does any one have read a core dump?
is there any reader for that? or may i know what is the use of that core which takes sometimes memory in GBs?
:) (6 Replies)
Discussion started by: sskb
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10. UNIX for Dummies Questions & Answers
help, what is the difference between core dump and panic dump? (1 Reply)
Discussion started by: aileen
1 Replies
savecore(8) System Manager's Manual savecore(8)
Name
savecore - save a core dump of the operating system
Syntax
/etc/savecore [ options ] dirname [ system ] [ corename ]
Description
The command is meant to be called near the end of the file. The command saves the core dump of the system (assuming one was made) and
writes a reboot message in the shutdown log.
The command checks the core dump to be certain it corresponds with the current running ULTRIX. If it does, it saves the core image in the
file dirname/vmcore.n and saves the namelist in the file dirname/vmunix.n. The trailing .n in the pathnames is replaced by a number which
increments each time is run in that directory.
After saving the core and namelist images, will save the error logger buffer into a predetermined file. The error logger buffer contains
information about why the crash occurred. After completes, the daemon will extract the error logger file and translate its contents into a
form familiar to the program.
Before writes out a core image, it reads a number from the file dirname/minfree. If there are fewer free blocks on the filesystem that
contains dirname than the number obtained from the file, a core dump is not done. If the file does not exist, savecore always writes out
the core file (assuming that a core dump was taken).
The command also writes a reboot message in the shut down log. If the system crashed as a result of a panic, also records the panic string
in the shut down log.
For partial crash dumps, creates a sparse core image file in dirname/vmcore.n. If this sparse core image file is copied or moved to
another location, the file expands to its true size which can take too much file system space. Hence, to copy or move sparse core image
files, you must use the command. The command has a conversion option to create sparse output files.
Options
-c Clears the core dump. This option is useful when the core dump is corrupted in a way that will not allow to save it safely. Use the
option with caution, because once it clears the core dump, the core dump cannot be retrieved.
-d dumpdev dumplo
Specifies the dump device and the dump offset when running on a system image other than the currently running system image. The pro-
gram assumes that the running system image is and it reads the dump device and dump device offset are different in the system image
that crashed, the option provides the correct dump device and dump device offset.
-e Saves only the error logger buffer into a file. If used, core or namelist images are not saved.
-f corename
Takes the i corefile name as the file from which to extract the the crash dump data instead of the default dump device. This option
is used only for diskless workstations.
If the core dump was from a system other than /vmunix, the name of that system must be supplied as system. The program assumes that the
running image is
After successful completion, the core dump is cleared. Also, a message is written in the file which tells whether the dump succeeded or
failed.
Files
Shut down log
Current running ULTRIX system
See Also
dd(1), uerf(8)
savecore(8)