selftests/bpf: add testcase for mixing fsession, fentry and fexit

Test the fsession when it is used together with fentry, fexit.

Signed-off-by: Menglong Dong <[email protected]>

Author: Menglong Dong

tools/testing/selftests/bpf/progs/fsession_test.c

@@ -228,3 +228,41 @@ int BPF_PROG(test12, int a)
 		test12_exit_ok = *cookie == 0x1111222233334444ull;
 	return 0;
 }
+
+__u64 test13_entry_result = 0;
+__u64 test13_exit_result = 0;
+
+SEC("fsession/bpf_fentry_test1")
+int BPF_PROG(test13, __u64 a, void *b, short c, int d, __u64 e, int ret)
+{
+	__u64 *cookie = bpf_fsession_cookie(ctx);
+
+	if (!bpf_tracing_is_exit(ctx)) {
+		test13_entry_result = a == 11 && b == (void *)12 && c == 13 && d == 14 &&
+			e == 15 && ret == 0;
+		*cookie = 0x123456ULL;
+		return 0;
+	}
+
+	test13_exit_result = a == 11 && b == (void *)12 && c == 13 && d == 14 &&
+		e == 15 && ret == 65 && *cookie == 0x123456ULL;
+	return 0;
+}
+
+__u64 test14_result = 0;
+SEC("fexit/bpf_fentry_test1")
+int BPF_PROG(test14, __u64 a, void *b, short c, int d, __u64 e, int ret)
+{
+	test14_result = a == 11 && b == (void *)12 && c == 13 && d == 14 &&
+		e == 15 && ret == 65;
+	return 0;
+}
+
+__u64 test15_result = 0;
+SEC("fentry/bpf_fentry_test1")
+int BPF_PROG(test15, __u64 a, void *b, short c, int d, __u64 e)
+{
+	test15_result = a == 11 && b == (void *)12 && c == 13 && d == 14 &&
+		e == 15;
+	return 0;
+}