selftests/bpf: make use of PROCMAP_QUERY ioctl if available

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Instead of parsing text-based /proc/<pid>/maps file, try to use
PROCMAP_QUERY ioctl() to simplify and speed up data fetching.
This logic is used to do uprobe file offset calculation, so any bugs in
this logic would manifest as failing uprobe BPF selftests.

This also serves as a simple demonstration of one of the intended uses.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20240806230319.869734-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Andrii Nakryiko 2024-08-06 16:03:19 -07:00 • committed by Alexei Starovoitov

parent b4406e1003

commit 4e9e07603e

3 changed files with 94 additions and 15 deletions

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3

tools/testing/selftests/bpf/test_progs.c

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2

tools/testing/selftests/bpf/test_progs.h

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104

tools/testing/selftests/bpf/trace_helpers.c

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