kvm-test-1-run-qemu.sh

  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