6f77212f27
Temporarily decompress a copy of a crash dump compressed with either gzip or zstd and run various tools against the decompressed copy while generating the crash information. The uncompressed copy is deleted when the script exits. Note that crashinfo is enabled by default, so this will attempt to decompress the most recent compressed crash dump after a crash that generates a compressed crash dump. Users who wish to only do offline analysis of compressed crash dumps can disable crashinfo in rc.conf. Tested by: ler Reviewed by: markj MFC after: 2 weeks
369 lines
8.3 KiB
Bash
Executable File
369 lines
8.3 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# SPDX-License-Identifier: BSD-3-Clause
|
|
#
|
|
# Copyright (c) 2008 Yahoo!, Inc.
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
# 1. Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# 2. Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in the
|
|
# documentation and/or other materials provided with the distribution.
|
|
# 3. Neither the name of the author nor the names of any co-contributors
|
|
# may be used to endorse or promote products derived from this software
|
|
# without specific prior written permission.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
# SUCH DAMAGE.
|
|
#
|
|
# $FreeBSD$
|
|
|
|
usage()
|
|
{
|
|
echo "usage: crashinfo [-b] [-d crashdir] [-n dumpnr]" \
|
|
"[-k kernel] [core]"
|
|
exit 1
|
|
}
|
|
|
|
# Remove an uncompressed copy of a dump
|
|
cleanup()
|
|
{
|
|
|
|
[ -e $VMCORE ] && rm -f $VMCORE
|
|
}
|
|
|
|
# Find a gdb binary to use and save the value in GDB.
|
|
find_gdb()
|
|
{
|
|
local binary
|
|
|
|
for binary in /usr/local/bin/gdb /usr/libexec/gdb /usr/bin/gdb; do
|
|
if [ -x ${binary} ]; then
|
|
GDB=${binary}
|
|
return
|
|
fi
|
|
done
|
|
}
|
|
|
|
# Run a single gdb command against a kernel file in batch mode.
|
|
# The kernel file is specified as the first argument and the command
|
|
# is given in the remaining arguments.
|
|
gdb_command()
|
|
{
|
|
local k
|
|
|
|
k=$1 ; shift
|
|
|
|
if [ ${GDB} = /usr/local/bin/gdb ]; then
|
|
${GDB} -batch -ex "$@" $k
|
|
else
|
|
echo -e "$@" | ${GDB} -x /dev/stdin -batch $k
|
|
fi
|
|
}
|
|
|
|
find_kernel()
|
|
{
|
|
local ivers k kvers
|
|
|
|
ivers=$(awk '
|
|
/Version String/ {
|
|
print
|
|
nextline=1
|
|
next
|
|
}
|
|
nextline==1 {
|
|
if ($0 ~ "^ [A-Za-z ]+: ") {
|
|
nextline=0
|
|
} else {
|
|
print
|
|
}
|
|
}' $INFO)
|
|
|
|
# Look for a matching kernel version, handling possible truncation
|
|
# of the version string recovered from the dump.
|
|
for k in `sysctl -n kern.bootfile` $(ls -t /boot/*/kernel); do
|
|
kvers=$(gdb_command $k 'printf " Version String: %s", version' | \
|
|
awk "{line=line\$0\"\n\"} END{print substr(line,1,${#ivers})}" \
|
|
2>/dev/null)
|
|
if [ "$ivers" = "$kvers" ]; then
|
|
KERNEL=$k
|
|
break
|
|
fi
|
|
done
|
|
}
|
|
|
|
BATCH=false
|
|
CRASHDIR=/var/crash
|
|
DUMPNR=
|
|
KERNEL=
|
|
|
|
while getopts "bd:n:k:" opt; do
|
|
case "$opt" in
|
|
b)
|
|
BATCH=true
|
|
;;
|
|
d)
|
|
CRASHDIR=$OPTARG
|
|
;;
|
|
n)
|
|
DUMPNR=$OPTARG
|
|
;;
|
|
k)
|
|
KERNEL=$OPTARG
|
|
;;
|
|
\?)
|
|
usage
|
|
;;
|
|
esac
|
|
done
|
|
|
|
shift $((OPTIND - 1))
|
|
|
|
if [ $# -eq 1 ]; then
|
|
if [ -n "$DUMPNR" ]; then
|
|
echo "-n and an explicit vmcore are mutually exclusive"
|
|
usage
|
|
fi
|
|
|
|
# Figure out the crash directory and number from the vmcore name.
|
|
CRASHDIR=`dirname $1`
|
|
DUMPNR=$(expr $(basename $1) : 'vmcore\.\([0-9]*\)')
|
|
if [ -z "$DUMPNR" ]; then
|
|
echo "Unable to determine dump number from vmcore file $1."
|
|
exit 1
|
|
fi
|
|
elif [ $# -gt 1 ]; then
|
|
usage
|
|
else
|
|
# If we don't have an explicit dump number, operate on the most
|
|
# recent dump.
|
|
if [ -z "$DUMPNR" ]; then
|
|
if ! [ -r $CRASHDIR/bounds ]; then
|
|
echo "No crash dumps in $CRASHDIR."
|
|
exit 1
|
|
fi
|
|
next=`cat $CRASHDIR/bounds`
|
|
if [ -z "$next" ] || [ "$next" -eq 0 ]; then
|
|
echo "No crash dumps in $CRASHDIR."
|
|
exit 1
|
|
fi
|
|
DUMPNR=$(($next - 1))
|
|
fi
|
|
fi
|
|
|
|
VMCORE=$CRASHDIR/vmcore.$DUMPNR
|
|
INFO=$CRASHDIR/info.$DUMPNR
|
|
FILE=$CRASHDIR/core.txt.$DUMPNR
|
|
HOSTNAME=`hostname`
|
|
|
|
if $BATCH; then
|
|
echo "Writing crash summary to $FILE."
|
|
exec > $FILE 2>&1
|
|
fi
|
|
|
|
find_gdb
|
|
if [ -z "$GDB" ]; then
|
|
echo "Unable to find a kernel debugger."
|
|
exit 1
|
|
fi
|
|
|
|
if [ ! -e $VMCORE ]; then
|
|
if [ -e $VMCORE.gz ]; then
|
|
trap cleanup EXIT HUP INT QUIT TERM
|
|
gzcat $VMCORE.gz > $VMCORE
|
|
elif [ -e $VMCORE.zst ]; then
|
|
trap cleanup EXIT HUP INT QUIT TERM
|
|
zstdcat $VMCORE.zst > $VMCORE
|
|
else
|
|
echo "$VMCORE not found"
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
if [ ! -e $INFO ]; then
|
|
echo "$INFO not found"
|
|
exit 1
|
|
fi
|
|
|
|
# If the user didn't specify a kernel, then try to find one.
|
|
if [ -z "$KERNEL" ]; then
|
|
find_kernel
|
|
if [ -z "$KERNEL" ]; then
|
|
echo "Unable to find matching kernel for $VMCORE"
|
|
exit 1
|
|
fi
|
|
elif [ ! -e $KERNEL ]; then
|
|
echo "$KERNEL not found"
|
|
exit 1
|
|
fi
|
|
|
|
umask 077
|
|
|
|
# Simulate uname
|
|
ostype=$(gdb_command $KERNEL 'printf "%s", ostype')
|
|
osrelease=$(gdb_command $KERNEL 'printf "%s", osrelease')
|
|
version=$(gdb_command $KERNEL 'printf "%s", version' | tr '\t\n' ' ')
|
|
machine=$(gdb_command $KERNEL 'printf "%s", machine')
|
|
|
|
if ! $BATCH; then
|
|
echo "Writing crash summary to $FILE."
|
|
exec > $FILE 2>&1
|
|
fi
|
|
|
|
echo "$HOSTNAME dumped core - see $VMCORE"
|
|
echo
|
|
date
|
|
echo
|
|
echo "$ostype $HOSTNAME $osrelease $version $machine"
|
|
echo
|
|
sed -ne '/^ Panic String: /{s//panic: /;p;}' $INFO
|
|
echo
|
|
|
|
# XXX: /bin/sh on 7.0+ is broken so we can't simply pipe the commands to
|
|
# kgdb via stdin and have to use a temporary file instead.
|
|
file=`mktemp /tmp/crashinfo.XXXXXX`
|
|
if [ $? -eq 0 ]; then
|
|
echo "bt" >> $file
|
|
echo "quit" >> $file
|
|
${GDB%gdb}kgdb $KERNEL $VMCORE < $file
|
|
rm -f $file
|
|
echo
|
|
fi
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "ps -axlww"
|
|
echo
|
|
ps -M $VMCORE -N $KERNEL -axlww
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "vmstat -s"
|
|
echo
|
|
vmstat -M $VMCORE -N $KERNEL -s
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "vmstat -m"
|
|
echo
|
|
vmstat -M $VMCORE -N $KERNEL -m
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "vmstat -z"
|
|
echo
|
|
vmstat -M $VMCORE -N $KERNEL -z
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "vmstat -i"
|
|
echo
|
|
vmstat -M $VMCORE -N $KERNEL -i
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "pstat -T"
|
|
echo
|
|
pstat -M $VMCORE -N $KERNEL -T
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "pstat -s"
|
|
echo
|
|
pstat -M $VMCORE -N $KERNEL -s
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "iostat"
|
|
echo
|
|
iostat -M $VMCORE -N $KERNEL
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "ipcs -a"
|
|
echo
|
|
ipcs -C $VMCORE -N $KERNEL -a
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "ipcs -T"
|
|
echo
|
|
ipcs -C $VMCORE -N $KERNEL -T
|
|
echo
|
|
|
|
# XXX: This doesn't actually work in 5.x+
|
|
if false; then
|
|
echo "------------------------------------------------------------------------"
|
|
echo "w -dn"
|
|
echo
|
|
w -M $VMCORE -N $KERNEL -dn
|
|
echo
|
|
fi
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "nfsstat"
|
|
echo
|
|
nfsstat -M $VMCORE -N $KERNEL
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "netstat -s"
|
|
echo
|
|
netstat -M $VMCORE -N $KERNEL -s
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "netstat -m"
|
|
echo
|
|
netstat -M $VMCORE -N $KERNEL -m
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "netstat -anA"
|
|
echo
|
|
netstat -M $VMCORE -N $KERNEL -anA
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "netstat -aL"
|
|
echo
|
|
netstat -M $VMCORE -N $KERNEL -aL
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "fstat"
|
|
echo
|
|
fstat -M $VMCORE -N $KERNEL
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "dmesg"
|
|
echo
|
|
dmesg -a -M $VMCORE -N $KERNEL
|
|
echo
|
|
|
|
echo "------------------------------------------------------------------------"
|
|
echo "kernel config"
|
|
echo
|
|
config -x $KERNEL
|
|
|
|
echo
|
|
echo "------------------------------------------------------------------------"
|
|
echo "ddb capture buffer"
|
|
echo
|
|
|
|
ddb capture -M $VMCORE -N $KERNEL print
|