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Subject[PATCH 08/10] ftrace/selftests: Update the direct call selftests to test two direct calls
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

The register_ftrace_direct() takes a different path if there's already a
direct call registered, but this was not tested in the self tests. Now that
there's a second direct caller test module, we can use this to test not only
one direct caller, but two.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
.../ftrace/test.d/direct/ftrace-direct.tc | 16 +++++
.../ftrace/test.d/direct/kprobe-direct.tc | 59 +++++++++++--------
2 files changed, 52 insertions(+), 23 deletions(-)

diff --git a/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc b/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc
index 8b8ed3cad51b..cbc7a30c2e0f 100644
--- a/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc
+++ b/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc
@@ -51,3 +51,19 @@ done

echo nop > current_tracer
rmmod ftrace-direct ||:
+
+# Now do the same thing with another direct function registered
+echo "Running with another ftrace direct function"
+
+rmmod ftrace-direct-too ||:
+modprobe ftrace-direct-too
+
+for t in `cat available_tracers`; do
+ if [ "$t" != "nop" ]; then
+ test_tracer $t
+ fi
+done
+
+echo nop > current_tracer
+rmmod ftrace-direct ||:
+rmmod ftrace-direct-too ||:
diff --git a/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc b/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
index 1561106765e4..d901416cb014 100644
--- a/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
+++ b/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
@@ -44,28 +44,41 @@ disable_probe() {
echo 0 > events/kprobes/kwake/enable
}

-# probe -> direct -> no direct > no probe
-enable_probe
-start_direct
-stop_direct
-disable_probe
-
-# probe -> direct -> no probe > no direct
-enable_probe
-start_direct
-disable_probe
-stop_direct
-
-# direct -> probe -> no probe > no direct
-start_direct
-enable_probe
-disable_probe
-stop_direct
-
-# direct -> probe -> no direct > no noprobe
-start_direct
-enable_probe
-stop_direct
-disable_probe
+test_kprobes() {
+ # probe -> direct -> no direct > no probe
+ enable_probe
+ start_direct
+ stop_direct
+ disable_probe
+
+ # probe -> direct -> no probe > no direct
+ enable_probe
+ start_direct
+ disable_probe
+ stop_direct
+
+ # direct -> probe -> no probe > no direct
+ start_direct
+ enable_probe
+ disable_probe
+ stop_direct
+
+ # direct -> probe -> no direct > no noprobe
+ start_direct
+ enable_probe
+ stop_direct
+ disable_probe
+}
+
+test_kprobes
+
+# Now do this with a second registered direct function
+echo "Running with another ftrace direct function"
+
+modprobe ftrace-direct-too
+
+test_kprobes
+
+rmmod ftrace-direct-too

echo > kprobe_events
--
2.23.0

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