find_btf_type
exp->local_struct = find_btf_type(local_btf, "a_struct", BTF_KIND_STRUCT);
exp->local_union = find_btf_type(local_btf, "a_union", BTF_KIND_UNION);
exp->local_enum = find_btf_type(local_btf, "an_enum", BTF_KIND_ENUM);
exp->local_int = find_btf_type(local_btf, "int", BTF_KIND_INT);
exp->local_struct_typedef = find_btf_type(local_btf, "named_struct_typedef", BTF_KIND_TYPEDEF);
exp->local_func_proto_typedef = find_btf_type(local_btf, "func_proto_typedef", BTF_KIND_TYPEDEF);
exp->local_arr_typedef = find_btf_type(local_btf, "arr_typedef", BTF_KIND_TYPEDEF);
exp->targ_struct = find_btf_type(targ_btf, "a_struct", BTF_KIND_STRUCT);
exp->targ_union = find_btf_type(targ_btf, "a_union", BTF_KIND_UNION);
exp->targ_enum = find_btf_type(targ_btf, "an_enum", BTF_KIND_ENUM);
exp->targ_int = find_btf_type(targ_btf, "int", BTF_KIND_INT);
exp->targ_struct_typedef = find_btf_type(targ_btf, "named_struct_typedef", BTF_KIND_TYPEDEF);
exp->targ_func_proto_typedef = find_btf_type(targ_btf, "func_proto_typedef", BTF_KIND_TYPEDEF);
exp->targ_arr_typedef = find_btf_type(targ_btf, "arr_typedef", BTF_KIND_TYPEDEF);