selftests/bpf: Add test for btf__add_btf() with split BTF sources

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Add a test that verifies btf__add_btf() correctly handles merging
multiple split BTF objects that share the same base BTF. The test
creates two sibling split BTFs on a common base, merges them into
a combined split BTF, and validates that base type references are
preserved while split type references are properly remapped.

Assisted-by: Claude:claude-opus-4-6

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/bpf/64a8c947bff1ae89efa9ba8c099466477762490f.1772657690.git.josef@toxicpanda.com

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Josef Bacik 2026-03-04 15:56:52 -05:00 • committed by Andrii Nakryiko

parent d8d5c01511

commit fefeeec612

1 changed files with 111 additions and 0 deletions

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

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