CRASHINFO(8)            FreeBSD 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).
     Note that kgdb must be installed from the devel/gdb port or gdb package.

     The options are as follows:

     -b      Run in batch mode.  Write most messages to the core.txt.XX file
             instead of the terminal.  This flag is used when crashinfo is run
             during boot.

     -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.

FreeBSD 13.1-RELEASE-p6        December 2, 2020        FreeBSD 13.1-RELEASE-p6