[PATCH v15 3/4] selftests/ftrace: Add testcases for objtrace

[Jeff Xie]

Add a series of testcases to illustrate correct and incorrect usage of
objtrace trigger.

Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: linux-kselftest@xxxxxxxxxxxxxxx
Signed-off-by: Jeff Xie <xiehuan09@xxxxxxxxx>
Tested-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Acked-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
---
 .../ftrace/test.d/trigger/trigger-objtrace.tc | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc

diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc
new file mode 100644
index 000000000000..d894442b6a30
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc
@@ -0,0 +1,41 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: event trigger - test objtrace-trigger
+# requires: kprobe_events "objtrace":README
+
+fail() { #msg
+    echo $1
+    exit_fail
+}
+
+echo 'p bio_add_page arg1=$arg1 arg2=$arg2' > kprobe_events
+
+FEATURE=`grep objtrace events/kprobes/p_bio_add_page_0/trigger`
+if [ -z "$FEATURE" ]; then
+    echo "objtrace trigger is not supported"
+    exit_unsupported
+fi
+
+echo "Test objtrace trigger"
+echo 'objtrace:add:arg1,0x28:u32:1 if comm == "cat"' > \
+	events/kprobes/p_bio_add_page_0/trigger
+if [ -z $? ]; then
+	fail "objtrace trigger syntax error"
+fi
+
+echo "Test objtrace semantic errors"
+
+# Being lack of objtrace command
+! echo 'objtrace:arg1,0x28:u32:1' > events/kprobes/p_bio_add_page_0/trigger
+# Bad parameter name
+! echo 'objtrace:add:argx:u32:1' > events/kprobes/p_bio_add_page_0/trigger
+# The parameter existed on event
+! echo 'objtrace:add:arg2:u32:1' > events/kprobes/p_bio_add_page_0/trigger
+
+echo "reset objtrace trigger"
+
+echo '!objtrace:add:arg1,0x28:u32' > \
+	events/kprobes/p_bio_add_page_0/trigger
+echo '-:p_bio_add_page_0' >> ./kprobe_events
+
+exit 0
-- 
2.25.1