selftests/bpf: Add test for tracepoint btf_ids tracefs file

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Read events/bpf_testmod/bpf_testmod_test_read/btf_ids and verify the
exported FUNC_PROTO matches the testmod tracepoint signature
(__data, struct task_struct *task, struct bpf_testmod_test_read_ctx
*ctx) and the record struct trace_event_raw_bpf_testmod_test_read
carries the fields declared by TP_STRUCT__entry.

Use the testmod tracepoint so the test exercises the module/split-BTF
path (btf_relocate_id) rather than vmlinux only, and falls back from
/sys/kernel/tracing to /sys/kernel/debug/tracing when tracefs is not
mounted at the new location.

Link: https://patch.msgid.link/20260518-generic_tracepoint-v2-3-b755a5cf67bb@meta.com
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Mykyta Yatsenko 2026-05-18 08:23:17 -07:00 • committed by Steven Rostedt

parent eadc0725ab

commit 74ae53cb7c

1 changed files with 132 additions and 0 deletions

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

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