[PATCH RFC memory-model 20/33] tools/memory-model: Make runlitmus.sh generate .litmus.out for --hw

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In the absence of "Result:" comments, the runlitmus.sh script relies on
litmus.out files from prior LKMM runs.  This can be a bit user-hostile,
so this commit makes runlitmus.sh generate any needed .litmus.out files
that don't already exist.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
---
 tools/memory-model/scripts/runlitmus.sh | 54 ++++++++++++++-----------
 1 file changed, 30 insertions(+), 24 deletions(-)

diff --git a/tools/memory-model/scripts/runlitmus.sh b/tools/memory-model/scripts/runlitmus.sh
index 91af859c0e90..2865a9661b07 100755
--- a/tools/memory-model/scripts/runlitmus.sh
+++ b/tools/memory-model/scripts/runlitmus.sh
@@ -28,42 +28,48 @@ if test -f "$litmus" -a -r "$litmus"
 then
 	:
 else
-	echo ' --- ' error: \"$litmus\" is not a readable file
+	echo ' !!! ' error: \"$litmus\" is not a readable file
 	exit 255
 fi
 
-if test -z "$LKMM_HW_MAP_FILE"
+if test -z "$LKMM_HW_MAP_FILE" -o ! -e $LKMM_DESTDIR/$litmus.out
 then
 	# LKMM run
 	herdoptions=${LKMM_HERD_OPTIONS--conf linux-kernel.cfg}
 	echo Herd options: $herdoptions > $LKMM_DESTDIR/$litmus.out
 	/usr/bin/time $LKMM_TIMEOUT_CMD herd7 $herdoptions $litmus >> $LKMM_DESTDIR/$litmus.out 2>&1
-else
-	# Hardware run
+	ret=$?
+	if test -z "$LKMM_HW_MAP_FILE"
+	then
+		exit $ret
+	fi
+	echo " --- " Automatically generated LKMM output for '"'--hw $LKMM_HW_MAP_FILE'"' run
+fi
 
-	T=/tmp/checklitmushw.sh.$$
-	trap 'rm -rf $T' 0 2
-	mkdir $T
+# Hardware run
 
-	# Generate filenames
-	catfile="`echo $LKMM_HW_MAP_FILE | tr '[A-Z]' '[a-z]'`.cat"
-	mapfile="Linux2${LKMM_HW_MAP_FILE}.map"
-	themefile="$T/${LKMM_HW_MAP_FILE}.theme"
-	herdoptions="-model $LKMM_HW_CAT_FILE"
-	hwlitmus=`echo $litmus | sed -e 's/\.litmus$/.'${LKMM_HW_MAP_FILE}'.litmus/'`
-	hwlitmusfile=`echo $hwlitmus | sed -e 's,^.*/,,'`
+T=/tmp/checklitmushw.sh.$$
+trap 'rm -rf $T' 0 2
+mkdir $T
 
-	# Don't run on litmus tests with complex synchronization
-	if ! scripts/simpletest.sh $litmus
-	then
-		echo ' --- ' error: \"$litmus\" contains locking, RCU, or SRCU
-		exit 254
-	fi
+# Generate filenames
+catfile="`echo $LKMM_HW_MAP_FILE | tr '[A-Z]' '[a-z]'`.cat"
+mapfile="Linux2${LKMM_HW_MAP_FILE}.map"
+themefile="$T/${LKMM_HW_MAP_FILE}.theme"
+herdoptions="-model $LKMM_HW_CAT_FILE"
+hwlitmus=`echo $litmus | sed -e 's/\.litmus$/.'${LKMM_HW_MAP_FILE}'.litmus/'`
+hwlitmusfile=`echo $hwlitmus | sed -e 's,^.*/,,'`
 
-	# Generate the assembly code and run herd on it.
-	gen_theme7 -n 10 -map $mapfile -call Linux.call > $themefile
-	jingle7 -theme $themefile $litmus > $T/$hwlitmusfile 2> $T/$hwlitmusfile.jingle7.out
-	/usr/bin/time $LKMM_TIMEOUT_CMD herd7 -model $catfile $T/$hwlitmusfile > $LKMM_DESTDIR/$hwlitmus.out 2>&1
+# Don't run on litmus tests with complex synchronization
+if ! scripts/simpletest.sh $litmus
+then
+	echo ' --- ' error: \"$litmus\" contains locking, RCU, or SRCU
+	exit 254
 fi
 
+# Generate the assembly code and run herd7 on it.
+gen_theme7 -n 10 -map $mapfile -call Linux.call > $themefile
+jingle7 -theme $themefile $litmus > $T/$hwlitmusfile 2> $T/$hwlitmusfile.jingle7.out
+/usr/bin/time $LKMM_TIMEOUT_CMD herd7 -model $catfile $T/$hwlitmusfile > $LKMM_DESTDIR/$hwlitmus.out 2>&1
+
 exit $?
-- 
2.17.1




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