name : kvm-test-1-run-qemu.sh #!/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