selftests/bpf: extend multi-uprobe tests with USDTs

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Validate libbpf's USDT-over-multi-uprobe logic by adding USDTs to
existing multi-uprobe tests. This checks correct libbpf fallback to
singular uprobes (when run on older kernels with buggy PID filtering).
We reuse already established child process and child thread testing
infrastructure, so additions are minimal. These test fail on either
older kernels or older version of libbpf that doesn't detect PID
filtering problems.

Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240521163401.3005045-6-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Andrii Nakryiko 2024-05-21 09:34:01 -07:00 • committed by Alexei Starovoitov

parent 70342420a1

commit 198034a87d

2 changed files with 56 additions and 2 deletions

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25

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

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33

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

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