linux-kernel - [PATCH v2 2/3] perf test: Cleanup daemon if test is interrupted.

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Date:   Tue, 16 Mar 2021 17:55:04 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v2 2/3] 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@...gle.com>
---
 tools/perf/tests/shell/daemon.sh | 34 +++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/tools/perf/tests/shell/daemon.sh b/tools/perf/tests/shell/daemon.sh
index 66ad56b4e0a5..61d13c4c64b8 100755
--- a/tools/perf/tests/shell/daemon.sh
+++ b/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"
-- 
2.31.0.rc2.261.g7f71774620-goog