selftests/bpf: Add kprobe session recursion check test

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>
Link: https://lore.kernel.org/r/20250106175048.1443905-2-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/testing/selftests/bpf/prog_tests/missed.c b/tools/testing/selftests/bpf/prog_tests/missed.c
index 70d90c43537c16f782a5ba86bb826403a76db4f5..ed8857ae914a6cf861b36b60dd2ef7790fae7532 100644 (file)
--- 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 c4bf679a987634c711970cf01ce0b041f3f05697..29c18d869ec1abd242667cdf147bb82cd7d7859d 100644 (file)
--- 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;
+}