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Commit 8fd7a61a authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Alexei Starovoitov
Browse files

selftests/bpf: add fwd enum resolution test for btf_dedup 



This patch adds test verifying new btf_dedup logic of resolving
forward-declared enums.

Signed-off-by: default avatarAndrii Nakryiko <andriin@fb.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 9768095b

tools/testing/selftests/bpf/test_btf.c

+44 −0
Original line number Diff line number Diff line
@@ -5874,6 +5874,50 @@ const struct btf_dedup_test dedup_tests[] = { 
		.dont_resolve_fwds = false,

	},

},

{

	.descr = "dedup: enum fwd resolution",

	.input = {

		.raw_types = {

			/* [1] fwd enum 'e1' before full enum */

			BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 4),

			/* [2] full enum 'e1' after fwd */

			BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),

				BTF_ENUM_ENC(NAME_NTH(2), 123),

			/* [3] full enum 'e2' before fwd */

			BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),

				BTF_ENUM_ENC(NAME_NTH(4), 456),

			/* [4] fwd enum 'e2' after full enum */

			BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 4),

			/* [5] incompatible fwd enum with different size */

			BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 1),

			/* [6] incompatible full enum with different value */

			BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),

				BTF_ENUM_ENC(NAME_NTH(2), 321),

			BTF_END_RAW,

		},

		BTF_STR_SEC("\0e1\0e1_val\0e2\0e2_val"),

	},

	.expect = {

		.raw_types = {

			/* [1] full enum 'e1' */

			BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),

				BTF_ENUM_ENC(NAME_NTH(2), 123),

			/* [2] full enum 'e2' */

			BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),

				BTF_ENUM_ENC(NAME_NTH(4), 456),

			/* [3] incompatible fwd enum with different size */

			BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 1),

			/* [4] incompatible full enum with different value */

			BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),

				BTF_ENUM_ENC(NAME_NTH(2), 321),

			BTF_END_RAW,

		},

		BTF_STR_SEC("\0e1\0e1_val\0e2\0e2_val"),

	},

	.opts = {

		.dont_resolve_fwds = false,

	},

},



};