9 More Discussions You Might Find Interesting
1. AIX
dear all,
i have p770 aix6.1
last week, the host reboot suddenly with dump. but i don't know how to analyze the dump.
I posted kdb details in the attachment.
please anybody help me.
#>kdb vmcore.0 /unix
vmcore.0 mapped from @ 700000000000000 to @ 7000001c72c0908
START ... (13 Replies)
Discussion started by: tomato00
13 Replies
2. UNIX for Dummies Questions & Answers
Can any body provide me some good link to learn to create and analyze linux user mode application / kernel module core dumps? (1 Reply)
Discussion started by: rupeshkp728
1 Replies
3. Solaris
How can we analyze a core file and determine why it was generated on a solaris system?
I know file core filename will tell us what program generated the file. But, what to do next to get more details?
Thanks, (5 Replies)
Discussion started by: Pouchie1
5 Replies
4. AIX
Please tell me some methods to analyse core dump in AIX.:) (2 Replies)
Discussion started by: Mythili
2 Replies
5. UNIX for Advanced & Expert Users
Hello,
I'm new to the group and this is my first post. I'm hoping someone can help me out. I have a core dump that I need to analyze from a Unix box and I've never done this sort of thing before. I was told to run a pmap and pstack on the core file which provided two different output files. ... (3 Replies)
Discussion started by: kimblebee
3 Replies
6. UNIX for Advanced & Expert Users
Hi,
I just wanted to know is there any tool avaliable for core analysis on hp-ux. I have heard about q4 utility. But I think it is used for analysis of system crash dump and not for core dump produced by a user process.
gdb doesn't give much information unless the binary is debug-build.
... (0 Replies)
Discussion started by: shriashishpatil
0 Replies
7. UNIX for Advanced & Expert Users
Hi All,
I am new to unix environment.
Please tell me how to do coredump analysis. Please explain clearly with example. What are the details are available in the core.
Thanks in advance (5 Replies)
Discussion started by: sip
5 Replies
8. UNIX for Dummies Questions & Answers
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)
Discussion started by: kristy
1 Replies
9. 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)