1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0+ 3# 4# Carry out a kvm-based run for the specified qemu-cmd file, which might 5# have been generated by --build-only kvm.sh run. 6# 7# Usage: kvm-test-1-run-qemu.sh qemu-cmd-dir 8# 9# qemu-cmd-dir provides the directory containing qemu-cmd file. 10# This is assumed to be of the form prefix/ds/scenario, where 11# "ds" is the top-level date-stamped directory and "scenario" 12# is the scenario name. Any required adjustments to this file 13# must have been made by the caller. The shell-command comments 14# at the end of the qemu-cmd file are not optional. 15# 16# Copyright (C) 2021 Facebook, Inc. 17# 18# Authors: Paul E. McKenney <paulmck@kernel.org> 19 20T=${TMPDIR-/tmp}/kvm-test-1-run-qemu.sh.$$ 21trap 'rm -rf $T' 0 22mkdir $T 23 24resdir="$1" 25if ! test -d "$resdir" 26then 27 echo $0: Nonexistent directory: $resdir 28 exit 1 29fi 30if ! test -f "$resdir/qemu-cmd" 31then 32 echo $0: Nonexistent qemu-cmd file: $resdir/qemu-cmd 33 exit 1 34fi 35 36echo ' ---' `date`: Starting kernel, PID $$ 37 38# Obtain settings from the qemu-cmd file. 39grep '^#' $resdir/qemu-cmd | sed -e 's/^# //' > $T/qemu-cmd-settings 40. $T/qemu-cmd-settings 41 42# Decorate qemu-cmd with affinity, redirection, backgrounding, and PID capture 43taskset_command= 44if test -n "$TORTURE_AFFINITY" 45then 46 taskset_command="taskset -c $TORTURE_AFFINITY " 47fi 48sed -e 's/^[^#].*$/'"$taskset_command"'& 2>\&1 \&/' < $resdir/qemu-cmd > $T/qemu-cmd 49echo 'qemu_pid=$!' >> $T/qemu-cmd 50echo 'echo $qemu_pid > $resdir/qemu-pid' >> $T/qemu-cmd 51echo 'taskset -c -p $qemu_pid > $resdir/qemu-affinity' >> $T/qemu-cmd 52 53# In case qemu refuses to run... 54echo "NOTE: $QEMU either did not run or was interactive" > $resdir/console.log 55 56# Attempt to run qemu 57kstarttime=`gawk 'BEGIN { print systime() }' < /dev/null` 58( . $T/qemu-cmd; wait `cat $resdir/qemu-pid`; echo $? > $resdir/qemu-retval ) & 59commandcompleted=0 60if test -z "$TORTURE_KCONFIG_GDB_ARG" 61then 62 sleep 10 # Give qemu's pid a chance to reach the file 63 if test -s "$resdir/qemu-pid" 64 then 65 qemu_pid=`cat "$resdir/qemu-pid"` 66 echo Monitoring qemu job at pid $qemu_pid `date` 67 else 68 qemu_pid="" 69 echo Monitoring qemu job at yet-as-unknown pid `date` 70 fi 71fi 72if test -n "$TORTURE_KCONFIG_GDB_ARG" 73then 74 base_resdir=`echo $resdir | sed -e 's/\.[0-9]\+$//'` 75 if ! test -f $base_resdir/vmlinux 76 then 77 base_resdir="`cat re-run`/$resdir" 78 if ! test -f $base_resdir/vmlinux 79 then 80 base_resdir=/path/to 81 fi 82 fi 83 echo Waiting for you to attach a debug session, for example: > /dev/tty 84 echo " gdb $base_resdir/vmlinux" > /dev/tty 85 echo 'After symbols load and the "(gdb)" prompt appears:' > /dev/tty 86 echo " target remote :1234" > /dev/tty 87 echo " continue" > /dev/tty 88 kstarttime=`gawk 'BEGIN { print systime() }' < /dev/null` 89fi 90while : 91do 92 if test -z "$qemu_pid" && test -s "$resdir/qemu-pid" 93 then 94 qemu_pid=`cat "$resdir/qemu-pid"` 95 fi 96 kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null` 97 if test -z "$qemu_pid" || kill -0 "$qemu_pid" > /dev/null 2>&1 98 then 99 if test -n "$TORTURE_KCONFIG_GDB_ARG" 100 then 101 : 102 elif test $kruntime -ge $seconds || test -f "$resdir/../STOP.1" 103 then 104 break; 105 fi 106 sleep 1 107 else 108 commandcompleted=1 109 if test $kruntime -lt $seconds 110 then 111 echo Completed in $kruntime vs. $seconds >> $resdir/Warnings 2>&1 112 grep "^(qemu) qemu:" $resdir/kvm-test-1-run.sh.out >> $resdir/Warnings 2>&1 113 killpid="`sed -n "s/^(qemu) qemu: terminating on signal [0-9]* from pid \([0-9]*\).*$/\1/p" $resdir/Warnings`" 114 if test -n "$killpid" 115 then 116 echo "ps -fp $killpid" >> $resdir/Warnings 2>&1 117 ps -fp $killpid >> $resdir/Warnings 2>&1 118 fi 119 else 120 echo ' ---' `date`: "Kernel done" 121 fi 122 break 123 fi 124done 125if test -z "$qemu_pid" && test -s "$resdir/qemu-pid" 126then 127 qemu_pid=`cat "$resdir/qemu-pid"` 128fi 129if test $commandcompleted -eq 0 && test -n "$qemu_pid" 130then 131 if ! test -f "$resdir/../STOP.1" 132 then 133 echo Grace period for qemu job at pid $qemu_pid `date` 134 fi 135 oldline="`tail $resdir/console.log`" 136 while : 137 do 138 if test -f "$resdir/../STOP.1" 139 then 140 echo "PID $qemu_pid killed due to run STOP.1 request `date`" >> $resdir/Warnings 2>&1 141 kill -KILL $qemu_pid 142 break 143 fi 144 kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null` 145 if kill -0 $qemu_pid > /dev/null 2>&1 146 then 147 : 148 else 149 break 150 fi 151 must_continue=no 152 newline="`tail $resdir/console.log`" 153 if test "$newline" != "$oldline" && echo $newline | grep -q ' [0-9]\+us : ' 154 then 155 must_continue=yes 156 fi 157 last_ts="`tail $resdir/console.log | grep '^\[ *[0-9]\+\.[0-9]\+]' | tail -1 | sed -e 's/^\[ *//' -e 's/\..*$//'`" 158 if test -z "$last_ts" 159 then 160 last_ts=0 161 fi 162 if test "$newline" != "$oldline" && test "$last_ts" -lt $((seconds + $TORTURE_SHUTDOWN_GRACE)) && test "$last_ts" -gt "$TORTURE_SHUTDOWN_GRACE" 163 then 164 must_continue=yes 165 if test $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE)) 166 then 167 echo Continuing at console.log time $last_ts \"`tail -n 1 $resdir/console.log`\" `date` 168 fi 169 fi 170 if test $must_continue = no && test $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE)) 171 then 172 echo "!!! PID $qemu_pid hung at $kruntime vs. $seconds seconds `date`" >> $resdir/Warnings 2>&1 173 kill -KILL $qemu_pid 174 break 175 fi 176 oldline=$newline 177 sleep 10 178 done 179elif test -z "$qemu_pid" 180then 181 echo Unknown PID, cannot kill qemu command 182fi 183 184# Tell the script that this run is done. 185rm -f $resdir/build.run 186