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libbpf: Fix single-line struct definition output in btf_dump

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[ Upstream commit 872aec4b5f ]

btf_dump APIs emit unnecessary tabs when emitting struct/union
definition that fits on the single line. Before this patch we'd get:

struct blah {<tab>};

This patch fixes this and makes sure that we get more natural:

struct blah {};

Fixes: 44a726c3f2 ("bpftool: Print newline before '}' for struct with padding only fields")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20221212211505.558851-2-andrii@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Andrii Nakryiko 2022-12-12 13:15:00 -08:00 • committed by Justin Hammond
parent d2f96001a5
commit c4724e101b
1 changed files with 5 additions and 2 deletions
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7
tools/lib/bpf/btf_dump.c
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@ -1003,9 +1003,12 @@ static void btf_dump_emit_struct_def(struct btf_dump *d,
* Keep `struct empty {}` on a single line,
* only print newline when there are regular or padding fields.
*/
if (vlen || t->size)
if (vlen || t->size) {
btf_dump_printf(d, "\n");
btf_dump_printf(d, "%s}", pfx(lvl));
btf_dump_printf(d, "%s}", pfx(lvl));
} else {
btf_dump_printf(d, "}");
}
if (packed)
btf_dump_printf(d, " __attribute__((packed))");
}