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Full Discussion: core dump
Top Forums UNIX for Dummies Questions & Answers core dump Post 20785 by Perderabo on Friday 3rd of May 2002 03:20:33 PM
Old 05-03-2002
Whoa! I think you may have your core files mixed up.

One type of corefiles is a file called "core" that appears in various directories around your system. When a process aborts as the result of a default action of certain uncaught signals, it tries to write a file called "core" in the current directory. This type of core file is just the stack and data segments of the process that aborted.

A second type of corefile occurs when the kernel detects a massive problem. The kernel will call an internal routine called "panic". panic will try to dump all of main memory to the swap area. Then is will halt or reboot depending on your config. When the box finally does boot, savecore will copy the corefile into the file system.

adb can be used on both types of corefiles. Type two is the type that needs a copy on vmunix. Type one on ethe other hand will need the executable that was running to cause the core file.
 

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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
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