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authorNamhyung Kim <namhyung@kernel.org>2016-05-10 23:53:06 +0900
committerShuah Khan <shuahkh@osg.samsung.com>2016-05-16 09:02:03 -0600
commit2c6c3946c3955f96ae0d48fdac940903918207d8 (patch)
treef3f1752d48642a41db3cf35db766ae8a96209df2 /tools/testing
parent5a614ec8a7cfe9098475fa1221b409fb7eec6054 (diff)
downloadlinux-2c6c3946c3955f96ae0d48fdac940903918207d8.tar.bz2
kselftests/ftrace: Add a test case for event pid filtering
Check event is filtered by set_event_pid and options/event-fork. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Diffstat (limited to 'tools/testing')
-rw-r--r--tools/testing/selftests/ftrace/test.d/event/event-pid.tc72
1 files changed, 72 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/event/event-pid.tc b/tools/testing/selftests/ftrace/test.d/event/event-pid.tc
new file mode 100644
index 000000000000..d4ab27b522f8
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/event/event-pid.tc
@@ -0,0 +1,72 @@
+#!/bin/sh
+# description: event tracing - restricts events based on pid
+
+do_reset() {
+ echo > set_event
+ echo > set_event_pid
+ echo 0 > options/event-fork
+ clear_trace
+}
+
+fail() { #msg
+ do_reset
+ echo $1
+ exit $FAIL
+}
+
+yield() {
+ ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1
+}
+
+if [ ! -f set_event -o ! -d events/sched ]; then
+ echo "event tracing is not supported"
+ exit_unsupported
+fi
+
+if [ ! -f set_event_pid ]; then
+ echo "event pid filtering is not supported"
+ exit_unsupported
+fi
+
+reset_tracer
+do_reset
+
+echo 1 > events/sched/sched_switch/enable
+
+yield
+
+count=`cat trace | grep sched_switch | wc -l`
+if [ $count -eq 0 ]; then
+ fail "sched_switch events are not recorded"
+fi
+
+do_reset
+
+read mypid rest < /proc/self/stat
+
+echo $mypid > set_event_pid
+echo 'sched:sched_switch' > set_event
+
+yield
+
+count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l`
+if [ $count -ne 0 ]; then
+ fail "sched_switch events from other task are recorded"
+fi
+
+do_reset
+
+echo $mypid > set_event_pid
+echo 1 > options/event-fork
+echo 1 > events/sched/sched_switch/enable
+
+yield
+
+count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l`
+if [ $count -eq 0 ]; then
+ fail "sched_switch events from other task are not recorded"
+fi
+
+do_reset
+
+exit 0