linux-kernel - [PATCH v2 bpf-next 3/3] selftests/bpf: Add selftest for attaching fexit to _

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Message-Id: <20250223062735.3341-4-laoar.shao@gmail.com>
Date: Sun, 23 Feb 2025 14:27:35 +0800
From: Yafang Shao <laoar.shao@...il.com>
To: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	jpoimboe@...nel.org,
	peterz@...radead.org
Cc: bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Yafang Shao <laoar.shao@...il.com>
Subject: [PATCH v2 bpf-next 3/3] selftests/bpf: Add selftest for attaching fexit to __noreturn functions

The reuslt:

  $ tools/testing/selftests/bpf/test_progs --name=fexit_noreturns
  #99/1    fexit_noreturns/noreturns:OK
  #99      fexit_noreturns:OK
  Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Yafang Shao <laoar.shao@...il.com>
---
 .../selftests/bpf/prog_tests/fexit_noreturns.c    |  9 +++++++++
 .../testing/selftests/bpf/progs/fexit_noreturns.c | 15 +++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/fexit_noreturns.c
 create mode 100644 tools/testing/selftests/bpf/progs/fexit_noreturns.c

diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_noreturns.c b/tools/testing/selftests/bpf/prog_tests/fexit_noreturns.c
new file mode 100644
index 000000000000..568d3aa48a78
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/fexit_noreturns.c
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <test_progs.h>
+#include "fexit_noreturns.skel.h"
+
+void test_fexit_noreturns(void)
+{
+	RUN_TESTS(fexit_noreturns);
+}
diff --git a/tools/testing/selftests/bpf/progs/fexit_noreturns.c b/tools/testing/selftests/bpf/progs/fexit_noreturns.c
new file mode 100644
index 000000000000..a8d25b21f7c2
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/fexit_noreturns.c
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include "bpf_misc.h"
+
+char _license[] SEC("license") = "GPL";
+
+SEC("fexit/do_exit")
+__failure __msg("Attaching fexit to __noreturn functions is rejected.")
+int BPF_PROG(noreturns)
+{
+	return 0;
+}
-- 
2.43.5