selftests/bpf: Add test for missed counts of perf event link kprobe

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Adding test that puts kprobe on bpf_fentry_test1 that calls
bpf_kfunc_common_test kfunc, which has also kprobe on.

The latter won't get triggered due to kprobe recursion check
and kprobe missed counter is incremented.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/bpf/20230920213145.1941596-8-jolsa@kernel.org

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This commit is contained in:

Jiri Olsa 2023-09-20 23:31:43 +02:00 • committed by Andrii Nakryiko

parent b563b9bae8

commit 01e4ae474e

4 changed files with 84 additions and 0 deletions

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5

tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c

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2

tools/testing/selftests/bpf/bpf_testmod/bpf_testmod_kfunc.h

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47

tools/testing/selftests/bpf/prog_tests/missed.c

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30

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

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