From: Yafang Shao <laoar.shao@gmail.com>
Date: Tue, 18 Mar 2025 11:44:47 +0000 (+0800)
Subject: selftests/bpf: Add selftest for attaching fexit to __noreturn functions
X-Git-Tag: v6.15-rc1~99^2~6^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=be16ddeaae960f8d03472e8b62aae50fc469f1c9;p=thirdparty%2Fkernel%2Fstable.git

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@gmail.com>
Link: https://lore.kernel.org/r/20250318114447.75484-3-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---

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 0000000000000..568d3aa48a78b
--- /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 0000000000000..54654539f550c
--- /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/fmod_ret to __noreturn functions is rejected.")
+int BPF_PROG(noreturns)
+{
+	return 0;
+}