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