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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
#
# Carry out a kvm-based run for the specified qemu-cmd file, which might
# have been generated by --build-only kvm.sh run.
#
# Usage: kvm-test-1-run-qemu.sh qemu-cmd-dir
#
# qemu-cmd-dir provides the directory containing qemu-cmd file.
# This is assumed to be of the form prefix/ds/scenario, where
# "ds" is the top-level date-stamped directory and "scenario"
# is the scenario name. Any required adjustments to this file
# must have been made by the caller. The shell-command comments
# at the end of the qemu-cmd file are not optional.
#
# Copyright (C) 2021 Facebook, Inc.
#
# Authors: Paul E. McKenney <paulmck@kernel.org>
T="`mktemp -d ${TMPDIR-/tmp}/kvm-test-1-run-qemu.sh.XXXXXX`"
trap 'rm -rf $T' 0
resdir="$1"
if ! test -d "$resdir"
then
echo $0: Nonexistent directory: $resdir
exit 1
fi
if ! test -f "$resdir/qemu-cmd"
then
echo $0: Nonexistent qemu-cmd file: $resdir/qemu-cmd
exit 1
fi
echo ' ---' `date`: Starting kernel, PID $$
# Obtain settings from the qemu-cmd file.
grep '^#' $resdir/qemu-cmd | sed -e 's/^# //' > $T/qemu-cmd-settings
. $T/qemu-cmd-settings
# Decorate qemu-cmd with affinity, redirection, backgrounding, and PID capture
taskset_command=
if test -n "$TORTURE_AFFINITY"
then
taskset_command="taskset -c $TORTURE_AFFINITY "
fi
sed -e 's/^[^#].*$/'"$taskset_command"'& 2>\&1 \&/' < $resdir/qemu-cmd > $T/qemu-cmd
echo 'qemu_pid=$!' >> $T/qemu-cmd
echo 'echo $qemu_pid > $resdir/qemu-pid' >> $T/qemu-cmd
echo 'taskset -c -p $qemu_pid > $resdir/qemu-affinity' >> $T/qemu-cmd
# In case qemu refuses to run...
echo "NOTE: $QEMU either did not run or was interactive" > $resdir/console.log
# Attempt to run qemu
kstarttime=`gawk 'BEGIN { print systime() }' < /dev/null`
( . $T/qemu-cmd; wait `cat $resdir/qemu-pid`; echo $? > $resdir/qemu-retval ) &
commandcompleted=0
if test -z "$TORTURE_KCONFIG_GDB_ARG"
then
sleep 10 # Give qemu's pid a chance to reach the file
if test -s "$resdir/qemu-pid"
then
qemu_pid=`cat "$resdir/qemu-pid"`
echo Monitoring qemu job at pid $qemu_pid `date`
else
qemu_pid=""
echo Monitoring qemu job at yet-as-unknown pid `date`
fi
fi
if test -n "$TORTURE_KCONFIG_GDB_ARG"
then
base_resdir=`echo $resdir | sed -e 's/\.[0-9]\+$//'`
if ! test -f $base_resdir/vmlinux
then
base_resdir="`cat re-run`/$resdir"
if ! test -f $base_resdir/vmlinux
then
base_resdir=/path/to
fi
fi
echo Waiting for you to attach a debug session, for example: > /dev/tty
echo " gdb $base_resdir/vmlinux" > /dev/tty
echo 'After symbols load and the "(gdb)" prompt appears:' > /dev/tty
echo " target remote :1234" > /dev/tty
echo " continue" > /dev/tty
kstarttime=`gawk 'BEGIN { print systime() }' < /dev/null`
fi
while :
do
if test -z "$qemu_pid" && test -s "$resdir/qemu-pid"
then
qemu_pid=`cat "$resdir/qemu-pid"`
fi
kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
if test -z "$qemu_pid" || kill -0 "$qemu_pid" > /dev/null 2>&1
then
if test -n "$TORTURE_KCONFIG_GDB_ARG"
then
:
elif test $kruntime -ge $seconds || test -f "$resdir/../STOP.1"
then
break;
fi
sleep 1
else
commandcompleted=1
if test $kruntime -lt $seconds
then
echo Completed in $kruntime vs. $seconds >> $resdir/Warnings 2>&1
grep "^(qemu) qemu:" $resdir/kvm-test-1-run*.sh.out >> $resdir/Warnings 2>&1
killpid="`sed -n "s/^(qemu) qemu: terminating on signal [0-9]* from pid \([0-9]*\).*$/\1/p" $resdir/Warnings`"
if test -n "$killpid"
then
echo "ps -fp $killpid" >> $resdir/Warnings 2>&1
ps -fp $killpid >> $resdir/Warnings 2>&1
fi
else
echo ' ---' `date`: "Kernel done"
fi
break
fi
done
if test -z "$qemu_pid" && test -s "$resdir/qemu-pid"
then
qemu_pid=`cat "$resdir/qemu-pid"`
fi
if test $commandcompleted -eq 0 && test -n "$qemu_pid"
then
if ! test -f "$resdir/../STOP.1"
then
echo Grace period for qemu job at pid $qemu_pid `date`
fi
oldline="`tail $resdir/console.log`"
while :
do
if test -f "$resdir/../STOP.1"
then
echo "PID $qemu_pid killed due to run STOP.1 request `date`" >> $resdir/Warnings 2>&1
kill -KILL $qemu_pid
break
fi
kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
if kill -0 $qemu_pid > /dev/null 2>&1
then
:
else
break
fi
must_continue=no
newline="`tail $resdir/console.log`"
if test "$newline" != "$oldline" && echo $newline | grep -q ' [0-9]\+us : '
then
must_continue=yes
fi
last_ts="`tail $resdir/console.log | grep '^\[ *[0-9]\+\.[0-9]\+]' | tail -1 | sed -e 's/^\[ *//' -e 's/\..*$//'`"
if test -z "$last_ts"
then
last_ts=0
fi
if test "$newline" != "$oldline" && test "$last_ts" -lt $((seconds + $TORTURE_SHUTDOWN_GRACE)) && test "$last_ts" -gt "$TORTURE_SHUTDOWN_GRACE"
then
must_continue=yes
if test $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE))
then
echo Continuing at console.log time $last_ts \"`tail -n 1 $resdir/console.log`\" `date`
fi
fi
if test $must_continue = no && test $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE))
then
echo "!!! PID $qemu_pid hung at $kruntime vs. $seconds seconds `date`" >> $resdir/Warnings 2>&1
kill -KILL $qemu_pid
break
fi
oldline=$newline
sleep 10
done
elif test -z "$qemu_pid"
then
echo Unknown PID, cannot kill qemu command
fi
# Tell the script that this run is done.
rm -f $resdir/build.run
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