11-15-2001
Hi rwb1959,
This matter has become of great urgency to me. I got a new core dump today, and I need to analyze it. I am using dbx, and I see that one element in my array is blank even though it should contain data valid data, and this is the source to our program bombing out.
The question is, using the core and dbx can I get a trace of every time this array was refferenced and/or modified. Do I need a different debugger? If the core isn't enough, is there a different method to get a trace of my program?
Another big problem is that this oly happens on the customer';s machine, I cannot replicate it on my dev machine. And even worse, when I dial in to the customer I cannot reproduce it either?
If you have any suggestions I would greatly appreciate ie.
Thanks,
ebh
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LEARN ABOUT FREEBSD
crashinfo
CRASHINFO(8) BSD System Manager's Manual CRASHINFO(8)
NAME
crashinfo -- analyze a core dump of the operating system
SYNOPSIS
crashinfo [-d crashdir] [-n dumpnr] [-k kernel] [core]
DESCRIPTION
The crashinfo utility analyzes a core dump saved by savecore(8). It generates a text file containing the analysis in the same directory as
the core dump. For a given core dump file named vmcore.XX the generated text file will be named core.txt.XX.
By default, crashinfo analyzes the most recent core dump in the core dump directory. A specific core dump may be specified via either the
core or dumpnr arguments. Once crashinfo has located a core dump, it analyzes the core dump to determine the exact version of the kernel
that generated the core. It then looks for a matching kernel file under each of the subdirectories in /boot. The location of the kernel
file can also be explicitly provided via the kernel argument.
Once crashinfo has located a core dump and kernel, it uses several utilities to analyze the core including dmesg(8), fstat(1), iostat(8),
ipcs(1), kgdb(1), netstat(1), nfsstat(1), ps(1), pstat(8), and vmstat(8).
The options are as follows:
-d crashdir
Specify an alternate core dump directory. The default crash dump directory is /var/crash.
-n dumpnr
Use the core dump saved in vmcore.dumpnr instead of the latest core in the core dump directory.
-k kernel
Specify an explicit kernel file.
SEE ALSO
textdump(4), savecore(8)
HISTORY
The crashinfo utility appeared in FreeBSD 6.4.
BSD
June 28, 2008 BSD