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selftests/bpf: Add selftest for attaching fexit to __noreturn functions

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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>
This commit is contained in:
Yafang Shao
2025-03-18 19:44:47 +08:00
committed by Alexei Starovoitov
parent cfe816d469
commit be16ddeaae
2 changed files with 24 additions and 0 deletions
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9
tools/testing/selftests/bpf/prog_tests/fexit_noreturns.c Normal file
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@@ -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);
}

15
tools/testing/selftests/bpf/progs/fexit_noreturns.c Normal file
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@@ -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;
}