selftests/bpf: add btf_dedup test for VOID equivalence check (eb76899c) · Commits · 戴 / test

tools/testing/selftests/bpf/test_btf.c

+47 −0

Original line number	Diff line number	Diff line
		@@ -5776,6 +5776,53 @@ const struct btf_dedup_test dedup_tests[] = {
		.dedup_table_size = 1, /* force hash collisions */
		},
		},
		{
		.descr = "dedup: void equiv check",
		/*
		* // CU 1:
		* struct s {
		* struct {} *x;
		* };
		* // CU 2:
		* struct s {
		* int *x;
		* };
		*/
		.input = {
		.raw_types = {
		/* CU 1 */
		BTF_STRUCT_ENC(0, 0, 1), /* [1] struct {} */
		BTF_PTR_ENC(1), /* [2] ptr -> [1] */
		BTF_STRUCT_ENC(NAME_NTH(1), 1, 8), /* [3] struct s */
		BTF_MEMBER_ENC(NAME_NTH(2), 2, 0),
		/* CU 2 */
		BTF_PTR_ENC(0), /* [4] ptr -> void */
		BTF_STRUCT_ENC(NAME_NTH(1), 1, 8), /* [5] struct s */
		BTF_MEMBER_ENC(NAME_NTH(2), 4, 0),
		BTF_END_RAW,
		},
		BTF_STR_SEC("\0s\0x"),
		},
		.expect = {
		.raw_types = {
		/* CU 1 */
		BTF_STRUCT_ENC(0, 0, 1), /* [1] struct {} */
		BTF_PTR_ENC(1), /* [2] ptr -> [1] */
		BTF_STRUCT_ENC(NAME_NTH(1), 1, 8), /* [3] struct s */
		BTF_MEMBER_ENC(NAME_NTH(2), 2, 0),
		/* CU 2 */
		BTF_PTR_ENC(0), /* [4] ptr -> void */
		BTF_STRUCT_ENC(NAME_NTH(1), 1, 8), /* [5] struct s */
		BTF_MEMBER_ENC(NAME_NTH(2), 4, 0),
		BTF_END_RAW,
		},
		BTF_STR_SEC("\0s\0x"),
		},
		.opts = {
		.dont_resolve_fwds = false,
		.dedup_table_size = 1, /* force hash collisions */
		},
		},
		{
		.descr = "dedup: all possible kinds (no duplicates)",
		.input = {