netdev - [PATCHv2 RFC bpf-next 6/7] selftests/bpf: Add ftrace probe to fentry test

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Date:   Tue, 13 Apr 2021 14:15:15 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>, Daniel Xu <dxu@...uu.xyz>,
        Steven Rostedt <rostedt@...dmis.org>,
        Jesper Brouer <jbrouer@...hat.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Viktor Malik <vmalik@...hat.com>
Subject: [PATCHv2 RFC bpf-next 6/7] selftests/bpf: Add ftrace probe to fentry test

Adding 2 more tests for fentry probe test,
to show/test ftrace probe.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 .../selftests/bpf/prog_tests/fentry_test.c       |  5 ++++-
 tools/testing/selftests/bpf/progs/fentry_test.c  | 16 ++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/fentry_test.c b/tools/testing/selftests/bpf/prog_tests/fentry_test.c
index 04ebbf1cb390..70f414cb3bfd 100644
--- a/tools/testing/selftests/bpf/prog_tests/fentry_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/fentry_test.c
@@ -26,12 +26,15 @@ void test_fentry_test(void)
 	      err, errno, retval, duration);
 
 	result = (__u64 *)fentry_skel->bss;
-	for (i = 0; i < 6; i++) {
+	for (i = 0; i < 8; i++) {
 		if (CHECK(result[i] != 1, "result",
 			  "fentry_test%d failed err %lld\n", i + 1, result[i]))
 			goto cleanup;
 	}
 
+	ASSERT_EQ(result[8], 8, "result");
+	ASSERT_EQ(result[9], 2, "result");
+
 cleanup:
 	fentry_test__destroy(fentry_skel);
 }
diff --git a/tools/testing/selftests/bpf/progs/fentry_test.c b/tools/testing/selftests/bpf/progs/fentry_test.c
index 52a550d281d9..b32b589923a4 100644
--- a/tools/testing/selftests/bpf/progs/fentry_test.c
+++ b/tools/testing/selftests/bpf/progs/fentry_test.c
@@ -77,3 +77,19 @@ int BPF_PROG(test8, struct bpf_fentry_test_t *arg)
 		test8_result = 1;
 	return 0;
 }
+
+__u64 test9_result = 0;
+SEC("fentry.ftrace/bpf_fentry_test*")
+int BPF_PROG(test9)
+{
+	test9_result++;
+	return 0;
+}
+
+__u64 test10_result = 0;
+SEC("fentry.ftrace/bpf_fentry_test1|bpf_fentry_test2")
+int BPF_PROG(test10)
+{
+	test10_result++;
+	return 0;
+}
-- 
2.30.2