Commit 47461583 authored by Yonghong Song's avatar Yonghong Song Committed by Daniel Borkmann
Browse files

selftests/bpf: Add a dedup selftest with equivalent structure types 



Without previous libbpf patch, the following error will occur:

  $ ./test_progs -t btf
  ...
  do_test_dedup:FAIL:check btf_dedup failed errno:-22#13/205 btf/dedup: btf_type_tag #5, struct:FAIL

And the previous libbpf patch fixed the issue.

Signed-off-by: default avatarYonghong Song <yhs@fb.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211115163943.3922547-1-yhs@fb.com
parent 69a055d5

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

+26 −0
Original line number Diff line number Diff line
@@ -7352,6 +7352,32 @@ static struct btf_dedup_test dedup_tests[] = { 
		BTF_STR_SEC("\0tag1"),

	},

},

{

	.descr = "dedup: btf_type_tag #5, struct",

	.input = {

		.raw_types = {

			BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),				/* [1] */

			BTF_TYPE_TAG_ENC(NAME_NTH(1), 1),					/* [2] */

			BTF_TYPE_ENC(NAME_NTH(2), BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 1), 4),	/* [3] */

			BTF_MEMBER_ENC(NAME_NTH(3), 2, BTF_MEMBER_OFFSET(0, 0)),

			BTF_TYPE_TAG_ENC(NAME_NTH(1), 1),					/* [4] */

			BTF_TYPE_ENC(NAME_NTH(2), BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 1), 4),	/* [5] */

			BTF_MEMBER_ENC(NAME_NTH(3), 4, BTF_MEMBER_OFFSET(0, 0)),

			BTF_END_RAW,

		},

		BTF_STR_SEC("\0tag1\0t\0m"),

	},

	.expect = {

		.raw_types = {

			BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),				/* [1] */

			BTF_TYPE_TAG_ENC(NAME_NTH(1), 1),					/* [2] */

			BTF_TYPE_ENC(NAME_NTH(2), BTF_INFO_ENC(BTF_KIND_STRUCT, 1, 1), 4),	/* [3] */

			BTF_MEMBER_ENC(NAME_NTH(3), 2, BTF_MEMBER_OFFSET(0, 0)),

			BTF_END_RAW,

		},

		BTF_STR_SEC("\0tag1\0t\0m"),

	},

},



};