perf test: Cleanup daemon if test is interrupted.

Reorder daemon_start and daemon_exit as the trap handler is added in
daemon_start referencing daemon_exit.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210317005505.2794804-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/daemon.sh

@@ -98,6 +98,23 @@ check_line_other()
 	fi
 }
 
+daemon_exit()
+{
+	local config=$1
+
+	local line=`perf daemon --config ${config} -x: | head -1`
+	local pid=`echo "${line}" | awk 'BEGIN { FS = ":" } ; { print $1 }'`
+
+	# Reset trap handler.
+	trap - SIGINT SIGTERM
+
+	# stop daemon
+	perf daemon stop --config ${config}
+
+	# ... and wait for the pid to go away
+	tail --pid=${pid} -f /dev/null
+}
+
 daemon_start()
 {
 	local config=$1
@@ -105,6 +122,9 @@ daemon_start()
 
 	perf daemon start --config ${config}
 
+	# Clean up daemon if interrupted.
+	trap "echo 'FAILED: Signal caught'; daemon_exit ${config}; exit 1" SIGINT SIGTERM
+
 	# wait for the session to ping
 	local state="FAIL"
 	while [ "${state}" != "OK" ]; do
@@ -113,20 +133,6 @@ daemon_start()
 	done
 }
 
-daemon_exit()
-{
-	local config=$1
-
-	local line=`perf daemon --config ${config} -x: | head -1`
-	local pid=`echo "${line}" | awk 'BEGIN { FS = ":" } ; { print $1 }'`
-
-	# stop daemon
-	perf daemon stop --config ${config}
-
-	# ... and wait for the pid to go away
-	tail --pid=${pid} -f /dev/null
-}
-
 test_list()
 {
 	echo "test daemon list"