[PATCH bpf-next 2/2] selftests/bpf: Add kprobe session recursion check test

[Jiri Olsa <jolsa@kernel.org>]

Adding kprobe.session probe to bpf_kfunc_common_test that misses bpf
program execution due to recursion check and making sure it increases
the program missed count properly.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/testing/selftests/bpf/prog_tests/missed.c             | 1 +
 tools/testing/selftests/bpf/progs/missed_kprobe_recursion.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/missed.c b/tools/testing/selftests/bpf/prog_tests/missed.c
index 70d90c43537c..ed8857ae914a 100644
--- a/tools/testing/selftests/bpf/prog_tests/missed.c
+++ b/tools/testing/selftests/bpf/prog_tests/missed.c
@@ -85,6 +85,7 @@ static void test_missed_kprobe_recursion(void)
 	ASSERT_GE(get_missed_count(bpf_program__fd(skel->progs.test3)), 1, "test3_recursion_misses");
 	ASSERT_GE(get_missed_count(bpf_program__fd(skel->progs.test4)), 1, "test4_recursion_misses");
 	ASSERT_GE(get_missed_count(bpf_program__fd(skel->progs.test5)), 1, "test5_recursion_misses");
+	ASSERT_EQ(get_missed_count(bpf_program__fd(skel->progs.test6)), 1, "test6_recursion_misses");
 
 cleanup:
 	missed_kprobe_recursion__destroy(skel);
diff --git a/tools/testing/selftests/bpf/progs/missed_kprobe_recursion.c b/tools/testing/selftests/bpf/progs/missed_kprobe_recursion.c
index c4bf679a9876..29c18d869ec1 100644
--- a/tools/testing/selftests/bpf/progs/missed_kprobe_recursion.c
+++ b/tools/testing/selftests/bpf/progs/missed_kprobe_recursion.c
@@ -46,3 +46,9 @@ int test5(struct pt_regs *ctx)
 {
 	return 0;
 }
+
+SEC("kprobe.session/bpf_kfunc_common_test")
+int test6(struct pt_regs *ctx)
+{
+	return 0;
+}
-- 
2.47.0