Basically, you use a debugger. Since you did not specify an OS I'll assume you have
gdb. You must have compiled the file
in order for symbols to be available. If you are analyzing a core dump of somebody else's code you are in trouble.
The core dump file is called core
This will show you a backtrace (stack dump) of the call tree that lead to the crash.
You will have to find using the stack dump where in the code (not in a C library) the crash occurred. In other words the last line of the program's code that actually led to the crash.
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)
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)
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)
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)
We have just enabled core dump on our RHEL5.7 OS. the java process is terminating very often so we enable core dump to analysis the issue and find below in core dump file.
Core was generated by `/usr/java/jdk1.6.0_06//bin/java -server -Xms1536m -Xmx1536m -Xmn576m -XX:+Aggre'.
Program... (0 Replies)
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
LEARN ABOUT OSF1
crashdc
crashdc(8) System Manager's Manual crashdc(8)NAME
crashdc - Diagnostic data collection for a running or crashed system
SYNOPSIS
/usr/bin/crashdc [system-kernel] [core-image]
DESCRIPTION
The crashdc utility examines the core image of the operating system to extract critical diagnostic data. This utility is a shell script
that invokes several tools and commands that extract selected parameters of a running or a crashed system (for example, system configura-
tion, running processes, and panic messages).
The arguments to the crashdc utility are the system kernel and the core image. The default values are /vmunix and /dev/mem, respectively.
If you specify no arguments, the crashdc utility examines the running system.
The system usually invokes the crashdc utility during system startup. If the most recent core dump has been saved by the savecore command,
both the core image and the system kernel (respectively vmcore.n and vmunix.n, where the variable n is the crash number) are saved in the
crash directory (by default, /var/adm/crash). Also, the crashdc utility saves the output as the file crash-data.n (where the variable n is
the crash number) in the crash directory. The crashdc utility is invoked only if crash-data.n output in the crash directory does not exist
or is not from the most recent crash.
FILES
Default core image Default system image Output from crashdc
SEE ALSO
Commands: dbx(1), kdbx(8), savecore(8)crashdc(8)