Add --structured_ds

Former-commit-id: 660f4c49f4a59c3c9e6435b4a610a01760d75866

tools/cfar.sh

@@ -29,6 +29,7 @@ structured_stack_stamp=0
 structured_noc=0
 structured_nog=0
 structured_nos=0
+structured_ds=0
 config_name="unspecified"
 backend="strata"
 
@@ -59,6 +60,9 @@ do
 	elif [ "$i" == "--structured_nos" ]; then 	
 		structured_nos=1
 	# this option is for cfar, handle it and remove it from the ps_analyze arguments.
+	elif [ "$i" == "--structured_ds" ]; then 	
+		structured_ds=1
+	# this option is for cfar, handle it and remove it from the ps_analyze arguments.
 	elif [ "$i" == "--config_name" ]; then 	
 		seq=$(expr $seq + 1)
 		config_name=${cmd_line_options[$seq]}
@@ -144,6 +148,11 @@ do
 		per_variant_options+=(--step-option p1transform:"--canary_value 0x100${seq}${seq}000 --random_seed $anyseed")
 	fi
 
+	if [ $structured_ds -eq 1 ]; then
+		sharepath_key="$seq:$variants:dir://$share_path"
+		per_variant_options+=(--step-option duck_season:"--barrier $sharepath_key")
+	fi
+
 	# options to stack_stamp to create non-overlapping stamps
 	if [ $structured_stack_stamp  -eq 1 ]; then
 		# check even/odd status of variant number.