selftests/bpf: Test linking with duplicate extern functions

Browse source

Previously when multiple BPF object files referencing the same extern
function (usually kfunc) are statically linked using `bpftool gen
object`, libbpf tries to get the nonexistent size of BTF_KIND_FUNC_PROTO
and fails. This test ensures it is fixed.

Signed-off-by: Eric Long <i@hack3r.moe>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241002-libbpf-dup-extern-funcs-v4-2-560eb460ff90@hack3r.moe

...

This commit is contained in:

Eric Long 2024-10-02 14:25:07 +08:00 • committed by Andrii Nakryiko

parent 4b146e95da

commit 3c591de285

2 changed files with 16 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

tools/testing/selftests/bpf/progs/linked_funcs1.c

View file

8

tools/testing/selftests/bpf/progs/linked_funcs2.c

View file