selftests/bpf: Add test for recursion counts of perf event link kprobe
authorJiri Olsa <jolsa@kernel.org>
Wed, 20 Sep 2023 21:31:44 +0000 (23:31 +0200)
committerAndrii Nakryiko <andrii@kernel.org>
Mon, 25 Sep 2023 23:37:45 +0000 (16:37 -0700)
commit59e83c0187c5eed648c28aea637a5cf3e246921b
treefad29191f5c3c606de1a5ad7e8a70d1c171c04f7
parent01e4ae474e39b855f911caec355bb79e722562b3
selftests/bpf: Add test for recursion counts of perf event link kprobe

Adding selftest that puts kprobe.multi on bpf_fentry_test1 that
calls bpf_kfunc_common_test kfunc which has 3 perf event kprobes
and 1 kprobe.multi attached.

Because fprobe (kprobe.multi attach layear) does not have strict
recursion check the kprobe's bpf_prog_active check is hit for test2-5.

Disabling this test for arm64, because there's no fprobe support yet.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Tested-by: Song Liu <song@kernel.org>
Reviewed-by: Song Liu <song@kernel.org>
Acked-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/bpf/20230920213145.1941596-9-jolsa@kernel.org
tools/testing/selftests/bpf/DENYLIST.aarch64
tools/testing/selftests/bpf/prog_tests/missed.c
tools/testing/selftests/bpf/progs/missed_kprobe_recursion.c [new file with mode: 0644]