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selftests/bpf: Test btf dump for struct with padding only fields

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[ Upstream commit d503f1176b14f722a40ea5110312614982f9a80b ]

Structures with zero regular fields but some padding constitute a
special case in btf_dump.c:btf_dump_emit_struct_def with regards to
newline before closing '}'.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221001104425.415768-2-eddyz87@gmail.com
Stable-dep-of: ea2ce1ba99aa ("libbpf: Fix BTF-to-C converter's padding logic")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eduard Zingerman 2022-10-01 13:44:25 +03:00 committed by Greg Kroah-Hartman
parent 6777291c7b
commit 17a61d1e94
1 changed files with 9 additions and 0 deletions
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9
tools/testing/selftests/bpf/progs/btf_dump_test_case_padding.c
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@ -102,12 +102,21 @@ struct zone {
struct zone_padding __pad__;
};
/* ----- START-EXPECTED-OUTPUT ----- */
struct padding_wo_named_members {
long: 64;
long: 64;
};
/* ------ END-EXPECTED-OUTPUT ------ */
int f(struct {
struct padded_implicitly _1;
struct padded_explicitly _2;
struct padded_a_lot _3;
struct padded_cache_line _4;
struct zone _5;
struct padding_wo_named_members _6;
} *_)
{
return 0;