| // SPDX-License-Identifier: GPL-2.0 |
| /* Copyright (c) 2020 Facebook */ |
| #include <test_progs.h> |
| #include <bpf/btf.h> |
| #include "btf_helpers.h" |
| |
| void test_btf_write() { |
| const struct btf_var_secinfo *vi; |
| const struct btf_type *t; |
| const struct btf_member *m; |
| const struct btf_enum *v; |
| const struct btf_param *p; |
| struct btf *btf; |
| int id, err, str_off; |
| |
| btf = btf__new_empty(); |
| if (!ASSERT_OK_PTR(btf, "new_empty")) |
| return; |
| |
| str_off = btf__find_str(btf, "int"); |
| ASSERT_EQ(str_off, -ENOENT, "int_str_missing_off"); |
| |
| str_off = btf__add_str(btf, "int"); |
| ASSERT_EQ(str_off, 1, "int_str_off"); |
| |
| str_off = btf__find_str(btf, "int"); |
| ASSERT_EQ(str_off, 1, "int_str_found_off"); |
| |
| /* BTF_KIND_INT */ |
| id = btf__add_int(btf, "int", 4, BTF_INT_SIGNED); |
| ASSERT_EQ(id, 1, "int_id"); |
| |
| t = btf__type_by_id(btf, 1); |
| /* should re-use previously added "int" string */ |
| ASSERT_EQ(t->name_off, str_off, "int_name_off"); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "int", "int_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_INT, "int_kind"); |
| ASSERT_EQ(t->size, 4, "int_sz"); |
| ASSERT_EQ(btf_int_encoding(t), BTF_INT_SIGNED, "int_enc"); |
| ASSERT_EQ(btf_int_bits(t), 32, "int_bits"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 1), |
| "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "raw_dump"); |
| |
| /* invalid int size */ |
| id = btf__add_int(btf, "bad sz int", 7, 0); |
| ASSERT_ERR(id, "int_bad_sz"); |
| /* invalid encoding */ |
| id = btf__add_int(btf, "bad enc int", 4, 123); |
| ASSERT_ERR(id, "int_bad_enc"); |
| /* NULL name */ |
| id = btf__add_int(btf, NULL, 4, 0); |
| ASSERT_ERR(id, "int_bad_null_name"); |
| /* empty name */ |
| id = btf__add_int(btf, "", 4, 0); |
| ASSERT_ERR(id, "int_bad_empty_name"); |
| |
| /* PTR/CONST/VOLATILE/RESTRICT */ |
| id = btf__add_ptr(btf, 1); |
| ASSERT_EQ(id, 2, "ptr_id"); |
| t = btf__type_by_id(btf, 2); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_PTR, "ptr_kind"); |
| ASSERT_EQ(t->type, 1, "ptr_type"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 2), |
| "[2] PTR '(anon)' type_id=1", "raw_dump"); |
| |
| id = btf__add_const(btf, 5); /* points forward to restrict */ |
| ASSERT_EQ(id, 3, "const_id"); |
| t = btf__type_by_id(btf, 3); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_CONST, "const_kind"); |
| ASSERT_EQ(t->type, 5, "const_type"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 3), |
| "[3] CONST '(anon)' type_id=5", "raw_dump"); |
| |
| id = btf__add_volatile(btf, 3); |
| ASSERT_EQ(id, 4, "volatile_id"); |
| t = btf__type_by_id(btf, 4); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_VOLATILE, "volatile_kind"); |
| ASSERT_EQ(t->type, 3, "volatile_type"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 4), |
| "[4] VOLATILE '(anon)' type_id=3", "raw_dump"); |
| |
| id = btf__add_restrict(btf, 4); |
| ASSERT_EQ(id, 5, "restrict_id"); |
| t = btf__type_by_id(btf, 5); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_RESTRICT, "restrict_kind"); |
| ASSERT_EQ(t->type, 4, "restrict_type"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 5), |
| "[5] RESTRICT '(anon)' type_id=4", "raw_dump"); |
| |
| /* ARRAY */ |
| id = btf__add_array(btf, 1, 2, 10); /* int *[10] */ |
| ASSERT_EQ(id, 6, "array_id"); |
| t = btf__type_by_id(btf, 6); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_ARRAY, "array_kind"); |
| ASSERT_EQ(btf_array(t)->index_type, 1, "array_index_type"); |
| ASSERT_EQ(btf_array(t)->type, 2, "array_elem_type"); |
| ASSERT_EQ(btf_array(t)->nelems, 10, "array_nelems"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 6), |
| "[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10", "raw_dump"); |
| |
| /* STRUCT */ |
| err = btf__add_field(btf, "field", 1, 0, 0); |
| ASSERT_ERR(err, "no_struct_field"); |
| id = btf__add_struct(btf, "s1", 8); |
| ASSERT_EQ(id, 7, "struct_id"); |
| err = btf__add_field(btf, "f1", 1, 0, 0); |
| ASSERT_OK(err, "f1_res"); |
| err = btf__add_field(btf, "f2", 1, 32, 16); |
| ASSERT_OK(err, "f2_res"); |
| |
| t = btf__type_by_id(btf, 7); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "s1", "struct_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_STRUCT, "struct_kind"); |
| ASSERT_EQ(btf_vlen(t), 2, "struct_vlen"); |
| ASSERT_EQ(btf_kflag(t), true, "struct_kflag"); |
| ASSERT_EQ(t->size, 8, "struct_sz"); |
| m = btf_members(t) + 0; |
| ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name"); |
| ASSERT_EQ(m->type, 1, "f1_type"); |
| ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off"); |
| ASSERT_EQ(btf_member_bitfield_size(t, 0), 0, "f1_bit_sz"); |
| m = btf_members(t) + 1; |
| ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f2", "f2_name"); |
| ASSERT_EQ(m->type, 1, "f2_type"); |
| ASSERT_EQ(btf_member_bit_offset(t, 1), 32, "f2_bit_off"); |
| ASSERT_EQ(btf_member_bitfield_size(t, 1), 16, "f2_bit_sz"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 7), |
| "[7] STRUCT 's1' size=8 vlen=2\n" |
| "\t'f1' type_id=1 bits_offset=0\n" |
| "\t'f2' type_id=1 bits_offset=32 bitfield_size=16", "raw_dump"); |
| |
| /* UNION */ |
| id = btf__add_union(btf, "u1", 8); |
| ASSERT_EQ(id, 8, "union_id"); |
| |
| /* invalid, non-zero offset */ |
| err = btf__add_field(btf, "field", 1, 1, 0); |
| ASSERT_ERR(err, "no_struct_field"); |
| |
| err = btf__add_field(btf, "f1", 1, 0, 16); |
| ASSERT_OK(err, "f1_res"); |
| |
| t = btf__type_by_id(btf, 8); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "u1", "union_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_UNION, "union_kind"); |
| ASSERT_EQ(btf_vlen(t), 1, "union_vlen"); |
| ASSERT_EQ(btf_kflag(t), true, "union_kflag"); |
| ASSERT_EQ(t->size, 8, "union_sz"); |
| m = btf_members(t) + 0; |
| ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name"); |
| ASSERT_EQ(m->type, 1, "f1_type"); |
| ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off"); |
| ASSERT_EQ(btf_member_bitfield_size(t, 0), 16, "f1_bit_sz"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 8), |
| "[8] UNION 'u1' size=8 vlen=1\n" |
| "\t'f1' type_id=1 bits_offset=0 bitfield_size=16", "raw_dump"); |
| |
| /* ENUM */ |
| id = btf__add_enum(btf, "e1", 4); |
| ASSERT_EQ(id, 9, "enum_id"); |
| err = btf__add_enum_value(btf, "v1", 1); |
| ASSERT_OK(err, "v1_res"); |
| err = btf__add_enum_value(btf, "v2", 2); |
| ASSERT_OK(err, "v2_res"); |
| |
| t = btf__type_by_id(btf, 9); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "e1", "enum_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_kind"); |
| ASSERT_EQ(btf_vlen(t), 2, "enum_vlen"); |
| ASSERT_EQ(t->size, 4, "enum_sz"); |
| v = btf_enum(t) + 0; |
| ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v1", "v1_name"); |
| ASSERT_EQ(v->val, 1, "v1_val"); |
| v = btf_enum(t) + 1; |
| ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v2", "v2_name"); |
| ASSERT_EQ(v->val, 2, "v2_val"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 9), |
| "[9] ENUM 'e1' size=4 vlen=2\n" |
| "\t'v1' val=1\n" |
| "\t'v2' val=2", "raw_dump"); |
| |
| /* FWDs */ |
| id = btf__add_fwd(btf, "struct_fwd", BTF_FWD_STRUCT); |
| ASSERT_EQ(id, 10, "struct_fwd_id"); |
| t = btf__type_by_id(btf, 10); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "struct_fwd", "fwd_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind"); |
| ASSERT_EQ(btf_kflag(t), 0, "fwd_kflag"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 10), |
| "[10] FWD 'struct_fwd' fwd_kind=struct", "raw_dump"); |
| |
| id = btf__add_fwd(btf, "union_fwd", BTF_FWD_UNION); |
| ASSERT_EQ(id, 11, "union_fwd_id"); |
| t = btf__type_by_id(btf, 11); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "union_fwd", "fwd_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind"); |
| ASSERT_EQ(btf_kflag(t), 1, "fwd_kflag"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 11), |
| "[11] FWD 'union_fwd' fwd_kind=union", "raw_dump"); |
| |
| id = btf__add_fwd(btf, "enum_fwd", BTF_FWD_ENUM); |
| ASSERT_EQ(id, 12, "enum_fwd_id"); |
| t = btf__type_by_id(btf, 12); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "enum_fwd", "fwd_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_fwd_kind"); |
| ASSERT_EQ(btf_vlen(t), 0, "enum_fwd_kind"); |
| ASSERT_EQ(t->size, 4, "enum_fwd_sz"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 12), |
| "[12] ENUM 'enum_fwd' size=4 vlen=0", "raw_dump"); |
| |
| /* TYPEDEF */ |
| id = btf__add_typedef(btf, "typedef1", 1); |
| ASSERT_EQ(id, 13, "typedef_fwd_id"); |
| t = btf__type_by_id(btf, 13); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "typedef1", "typedef_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_TYPEDEF, "typedef_kind"); |
| ASSERT_EQ(t->type, 1, "typedef_type"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 13), |
| "[13] TYPEDEF 'typedef1' type_id=1", "raw_dump"); |
| |
| /* FUNC & FUNC_PROTO */ |
| id = btf__add_func(btf, "func1", BTF_FUNC_GLOBAL, 15); |
| ASSERT_EQ(id, 14, "func_id"); |
| t = btf__type_by_id(btf, 14); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "func1", "func_name"); |
| ASSERT_EQ(t->type, 15, "func_type"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC, "func_kind"); |
| ASSERT_EQ(btf_vlen(t), BTF_FUNC_GLOBAL, "func_vlen"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 14), |
| "[14] FUNC 'func1' type_id=15 linkage=global", "raw_dump"); |
| |
| id = btf__add_func_proto(btf, 1); |
| ASSERT_EQ(id, 15, "func_proto_id"); |
| err = btf__add_func_param(btf, "p1", 1); |
| ASSERT_OK(err, "p1_res"); |
| err = btf__add_func_param(btf, "p2", 2); |
| ASSERT_OK(err, "p2_res"); |
| |
| t = btf__type_by_id(btf, 15); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC_PROTO, "func_proto_kind"); |
| ASSERT_EQ(btf_vlen(t), 2, "func_proto_vlen"); |
| ASSERT_EQ(t->type, 1, "func_proto_ret_type"); |
| p = btf_params(t) + 0; |
| ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p1", "p1_name"); |
| ASSERT_EQ(p->type, 1, "p1_type"); |
| p = btf_params(t) + 1; |
| ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p2", "p2_name"); |
| ASSERT_EQ(p->type, 2, "p2_type"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 15), |
| "[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n" |
| "\t'p1' type_id=1\n" |
| "\t'p2' type_id=2", "raw_dump"); |
| |
| /* VAR */ |
| id = btf__add_var(btf, "var1", BTF_VAR_GLOBAL_ALLOCATED, 1); |
| ASSERT_EQ(id, 16, "var_id"); |
| t = btf__type_by_id(btf, 16); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "var1", "var_name"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_VAR, "var_kind"); |
| ASSERT_EQ(t->type, 1, "var_type"); |
| ASSERT_EQ(btf_var(t)->linkage, BTF_VAR_GLOBAL_ALLOCATED, "var_type"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 16), |
| "[16] VAR 'var1' type_id=1, linkage=global-alloc", "raw_dump"); |
| |
| /* DATASECT */ |
| id = btf__add_datasec(btf, "datasec1", 12); |
| ASSERT_EQ(id, 17, "datasec_id"); |
| err = btf__add_datasec_var_info(btf, 1, 4, 8); |
| ASSERT_OK(err, "v1_res"); |
| |
| t = btf__type_by_id(btf, 17); |
| ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "datasec1", "datasec_name"); |
| ASSERT_EQ(t->size, 12, "datasec_sz"); |
| ASSERT_EQ(btf_kind(t), BTF_KIND_DATASEC, "datasec_kind"); |
| ASSERT_EQ(btf_vlen(t), 1, "datasec_vlen"); |
| vi = btf_var_secinfos(t) + 0; |
| ASSERT_EQ(vi->type, 1, "v1_type"); |
| ASSERT_EQ(vi->offset, 4, "v1_off"); |
| ASSERT_EQ(vi->size, 8, "v1_sz"); |
| ASSERT_STREQ(btf_type_raw_dump(btf, 17), |
| "[17] DATASEC 'datasec1' size=12 vlen=1\n" |
| "\ttype_id=1 offset=4 size=8", "raw_dump"); |
| |
| btf__free(btf); |
| } |
