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0001 // SPDX-License-Identifier: GPL-2.0
0002 /* Copyright (c) 2020 Facebook */
0003 #include <test_progs.h>
0004 #include <bpf/btf.h>
0005 #include "btf_helpers.h"
0006 
0007 static void gen_btf(struct btf *btf)
0008 {
0009     const struct btf_var_secinfo *vi;
0010     const struct btf_type *t;
0011     const struct btf_member *m;
0012     const struct btf_enum64 *v64;
0013     const struct btf_enum *v;
0014     const struct btf_param *p;
0015     int id, err, str_off;
0016 
0017     str_off = btf__find_str(btf, "int");
0018     ASSERT_EQ(str_off, -ENOENT, "int_str_missing_off");
0019 
0020     str_off = btf__add_str(btf, "int");
0021     ASSERT_EQ(str_off, 1, "int_str_off");
0022 
0023     str_off = btf__find_str(btf, "int");
0024     ASSERT_EQ(str_off, 1, "int_str_found_off");
0025 
0026     /* BTF_KIND_INT */
0027     id = btf__add_int(btf, "int", 4,  BTF_INT_SIGNED);
0028     ASSERT_EQ(id, 1, "int_id");
0029 
0030     t = btf__type_by_id(btf, 1);
0031     /* should re-use previously added "int" string */
0032     ASSERT_EQ(t->name_off, str_off, "int_name_off");
0033     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "int", "int_name");
0034     ASSERT_EQ(btf_kind(t), BTF_KIND_INT, "int_kind");
0035     ASSERT_EQ(t->size, 4, "int_sz");
0036     ASSERT_EQ(btf_int_encoding(t), BTF_INT_SIGNED, "int_enc");
0037     ASSERT_EQ(btf_int_bits(t), 32, "int_bits");
0038     ASSERT_STREQ(btf_type_raw_dump(btf, 1),
0039              "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "raw_dump");
0040 
0041     /* invalid int size */
0042     id = btf__add_int(btf, "bad sz int", 7, 0);
0043     ASSERT_ERR(id, "int_bad_sz");
0044     /* invalid encoding */
0045     id = btf__add_int(btf, "bad enc int", 4, 123);
0046     ASSERT_ERR(id, "int_bad_enc");
0047     /* NULL name */
0048     id = btf__add_int(btf, NULL, 4, 0);
0049     ASSERT_ERR(id, "int_bad_null_name");
0050     /* empty name */
0051     id = btf__add_int(btf, "", 4, 0);
0052     ASSERT_ERR(id, "int_bad_empty_name");
0053 
0054     /* PTR/CONST/VOLATILE/RESTRICT */
0055     id = btf__add_ptr(btf, 1);
0056     ASSERT_EQ(id, 2, "ptr_id");
0057     t = btf__type_by_id(btf, 2);
0058     ASSERT_EQ(btf_kind(t), BTF_KIND_PTR, "ptr_kind");
0059     ASSERT_EQ(t->type, 1, "ptr_type");
0060     ASSERT_STREQ(btf_type_raw_dump(btf, 2),
0061              "[2] PTR '(anon)' type_id=1", "raw_dump");
0062 
0063     id = btf__add_const(btf, 5); /* points forward to restrict */
0064     ASSERT_EQ(id, 3, "const_id");
0065     t = btf__type_by_id(btf, 3);
0066     ASSERT_EQ(btf_kind(t), BTF_KIND_CONST, "const_kind");
0067     ASSERT_EQ(t->type, 5, "const_type");
0068     ASSERT_STREQ(btf_type_raw_dump(btf, 3),
0069              "[3] CONST '(anon)' type_id=5", "raw_dump");
0070 
0071     id = btf__add_volatile(btf, 3);
0072     ASSERT_EQ(id, 4, "volatile_id");
0073     t = btf__type_by_id(btf, 4);
0074     ASSERT_EQ(btf_kind(t), BTF_KIND_VOLATILE, "volatile_kind");
0075     ASSERT_EQ(t->type, 3, "volatile_type");
0076     ASSERT_STREQ(btf_type_raw_dump(btf, 4),
0077              "[4] VOLATILE '(anon)' type_id=3", "raw_dump");
0078 
0079     id = btf__add_restrict(btf, 4);
0080     ASSERT_EQ(id, 5, "restrict_id");
0081     t = btf__type_by_id(btf, 5);
0082     ASSERT_EQ(btf_kind(t), BTF_KIND_RESTRICT, "restrict_kind");
0083     ASSERT_EQ(t->type, 4, "restrict_type");
0084     ASSERT_STREQ(btf_type_raw_dump(btf, 5),
0085              "[5] RESTRICT '(anon)' type_id=4", "raw_dump");
0086 
0087     /* ARRAY */
0088     id = btf__add_array(btf, 1, 2, 10); /* int *[10] */
0089     ASSERT_EQ(id, 6, "array_id");
0090     t = btf__type_by_id(btf, 6);
0091     ASSERT_EQ(btf_kind(t), BTF_KIND_ARRAY, "array_kind");
0092     ASSERT_EQ(btf_array(t)->index_type, 1, "array_index_type");
0093     ASSERT_EQ(btf_array(t)->type, 2, "array_elem_type");
0094     ASSERT_EQ(btf_array(t)->nelems, 10, "array_nelems");
0095     ASSERT_STREQ(btf_type_raw_dump(btf, 6),
0096              "[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10", "raw_dump");
0097 
0098     /* STRUCT */
0099     err = btf__add_field(btf, "field", 1, 0, 0);
0100     ASSERT_ERR(err, "no_struct_field");
0101     id = btf__add_struct(btf, "s1", 8);
0102     ASSERT_EQ(id, 7, "struct_id");
0103     err = btf__add_field(btf, "f1", 1, 0, 0);
0104     ASSERT_OK(err, "f1_res");
0105     err = btf__add_field(btf, "f2", 1, 32, 16);
0106     ASSERT_OK(err, "f2_res");
0107 
0108     t = btf__type_by_id(btf, 7);
0109     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "s1", "struct_name");
0110     ASSERT_EQ(btf_kind(t), BTF_KIND_STRUCT, "struct_kind");
0111     ASSERT_EQ(btf_vlen(t), 2, "struct_vlen");
0112     ASSERT_EQ(btf_kflag(t), true, "struct_kflag");
0113     ASSERT_EQ(t->size, 8, "struct_sz");
0114     m = btf_members(t) + 0;
0115     ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name");
0116     ASSERT_EQ(m->type, 1, "f1_type");
0117     ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off");
0118     ASSERT_EQ(btf_member_bitfield_size(t, 0), 0, "f1_bit_sz");
0119     m = btf_members(t) + 1;
0120     ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f2", "f2_name");
0121     ASSERT_EQ(m->type, 1, "f2_type");
0122     ASSERT_EQ(btf_member_bit_offset(t, 1), 32, "f2_bit_off");
0123     ASSERT_EQ(btf_member_bitfield_size(t, 1), 16, "f2_bit_sz");
0124     ASSERT_STREQ(btf_type_raw_dump(btf, 7),
0125              "[7] STRUCT 's1' size=8 vlen=2\n"
0126              "\t'f1' type_id=1 bits_offset=0\n"
0127              "\t'f2' type_id=1 bits_offset=32 bitfield_size=16", "raw_dump");
0128 
0129     /* UNION */
0130     id = btf__add_union(btf, "u1", 8);
0131     ASSERT_EQ(id, 8, "union_id");
0132 
0133     /* invalid, non-zero offset */
0134     err = btf__add_field(btf, "field", 1, 1, 0);
0135     ASSERT_ERR(err, "no_struct_field");
0136 
0137     err = btf__add_field(btf, "f1", 1, 0, 16);
0138     ASSERT_OK(err, "f1_res");
0139 
0140     t = btf__type_by_id(btf, 8);
0141     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "u1", "union_name");
0142     ASSERT_EQ(btf_kind(t), BTF_KIND_UNION, "union_kind");
0143     ASSERT_EQ(btf_vlen(t), 1, "union_vlen");
0144     ASSERT_EQ(btf_kflag(t), true, "union_kflag");
0145     ASSERT_EQ(t->size, 8, "union_sz");
0146     m = btf_members(t) + 0;
0147     ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name");
0148     ASSERT_EQ(m->type, 1, "f1_type");
0149     ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off");
0150     ASSERT_EQ(btf_member_bitfield_size(t, 0), 16, "f1_bit_sz");
0151     ASSERT_STREQ(btf_type_raw_dump(btf, 8),
0152              "[8] UNION 'u1' size=8 vlen=1\n"
0153              "\t'f1' type_id=1 bits_offset=0 bitfield_size=16", "raw_dump");
0154 
0155     /* ENUM */
0156     id = btf__add_enum(btf, "e1", 4);
0157     ASSERT_EQ(id, 9, "enum_id");
0158     err = btf__add_enum_value(btf, "v1", 1);
0159     ASSERT_OK(err, "v1_res");
0160     err = btf__add_enum_value(btf, "v2", 2);
0161     ASSERT_OK(err, "v2_res");
0162 
0163     t = btf__type_by_id(btf, 9);
0164     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "e1", "enum_name");
0165     ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_kind");
0166     ASSERT_EQ(btf_vlen(t), 2, "enum_vlen");
0167     ASSERT_EQ(t->size, 4, "enum_sz");
0168     v = btf_enum(t) + 0;
0169     ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v1", "v1_name");
0170     ASSERT_EQ(v->val, 1, "v1_val");
0171     v = btf_enum(t) + 1;
0172     ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v2", "v2_name");
0173     ASSERT_EQ(v->val, 2, "v2_val");
0174     ASSERT_STREQ(btf_type_raw_dump(btf, 9),
0175              "[9] ENUM 'e1' encoding=UNSIGNED size=4 vlen=2\n"
0176              "\t'v1' val=1\n"
0177              "\t'v2' val=2", "raw_dump");
0178 
0179     /* FWDs */
0180     id = btf__add_fwd(btf, "struct_fwd", BTF_FWD_STRUCT);
0181     ASSERT_EQ(id, 10, "struct_fwd_id");
0182     t = btf__type_by_id(btf, 10);
0183     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "struct_fwd", "fwd_name");
0184     ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind");
0185     ASSERT_EQ(btf_kflag(t), 0, "fwd_kflag");
0186     ASSERT_STREQ(btf_type_raw_dump(btf, 10),
0187              "[10] FWD 'struct_fwd' fwd_kind=struct", "raw_dump");
0188 
0189     id = btf__add_fwd(btf, "union_fwd", BTF_FWD_UNION);
0190     ASSERT_EQ(id, 11, "union_fwd_id");
0191     t = btf__type_by_id(btf, 11);
0192     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "union_fwd", "fwd_name");
0193     ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind");
0194     ASSERT_EQ(btf_kflag(t), 1, "fwd_kflag");
0195     ASSERT_STREQ(btf_type_raw_dump(btf, 11),
0196              "[11] FWD 'union_fwd' fwd_kind=union", "raw_dump");
0197 
0198     id = btf__add_fwd(btf, "enum_fwd", BTF_FWD_ENUM);
0199     ASSERT_EQ(id, 12, "enum_fwd_id");
0200     t = btf__type_by_id(btf, 12);
0201     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "enum_fwd", "fwd_name");
0202     ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_fwd_kind");
0203     ASSERT_EQ(btf_vlen(t), 0, "enum_fwd_kind");
0204     ASSERT_EQ(t->size, 4, "enum_fwd_sz");
0205     ASSERT_STREQ(btf_type_raw_dump(btf, 12),
0206              "[12] ENUM 'enum_fwd' encoding=UNSIGNED size=4 vlen=0", "raw_dump");
0207 
0208     /* TYPEDEF */
0209     id = btf__add_typedef(btf, "typedef1", 1);
0210     ASSERT_EQ(id, 13, "typedef_fwd_id");
0211     t = btf__type_by_id(btf, 13);
0212     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "typedef1", "typedef_name");
0213     ASSERT_EQ(btf_kind(t), BTF_KIND_TYPEDEF, "typedef_kind");
0214     ASSERT_EQ(t->type, 1, "typedef_type");
0215     ASSERT_STREQ(btf_type_raw_dump(btf, 13),
0216              "[13] TYPEDEF 'typedef1' type_id=1", "raw_dump");
0217 
0218     /* FUNC & FUNC_PROTO */
0219     id = btf__add_func(btf, "func1", BTF_FUNC_GLOBAL, 15);
0220     ASSERT_EQ(id, 14, "func_id");
0221     t = btf__type_by_id(btf, 14);
0222     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "func1", "func_name");
0223     ASSERT_EQ(t->type, 15, "func_type");
0224     ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC, "func_kind");
0225     ASSERT_EQ(btf_vlen(t), BTF_FUNC_GLOBAL, "func_vlen");
0226     ASSERT_STREQ(btf_type_raw_dump(btf, 14),
0227              "[14] FUNC 'func1' type_id=15 linkage=global", "raw_dump");
0228 
0229     id = btf__add_func_proto(btf, 1);
0230     ASSERT_EQ(id, 15, "func_proto_id");
0231     err = btf__add_func_param(btf, "p1", 1);
0232     ASSERT_OK(err, "p1_res");
0233     err = btf__add_func_param(btf, "p2", 2);
0234     ASSERT_OK(err, "p2_res");
0235 
0236     t = btf__type_by_id(btf, 15);
0237     ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC_PROTO, "func_proto_kind");
0238     ASSERT_EQ(btf_vlen(t), 2, "func_proto_vlen");
0239     ASSERT_EQ(t->type, 1, "func_proto_ret_type");
0240     p = btf_params(t) + 0;
0241     ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p1", "p1_name");
0242     ASSERT_EQ(p->type, 1, "p1_type");
0243     p = btf_params(t) + 1;
0244     ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p2", "p2_name");
0245     ASSERT_EQ(p->type, 2, "p2_type");
0246     ASSERT_STREQ(btf_type_raw_dump(btf, 15),
0247              "[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
0248              "\t'p1' type_id=1\n"
0249              "\t'p2' type_id=2", "raw_dump");
0250 
0251     /* VAR */
0252     id = btf__add_var(btf, "var1", BTF_VAR_GLOBAL_ALLOCATED, 1);
0253     ASSERT_EQ(id, 16, "var_id");
0254     t = btf__type_by_id(btf, 16);
0255     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "var1", "var_name");
0256     ASSERT_EQ(btf_kind(t), BTF_KIND_VAR, "var_kind");
0257     ASSERT_EQ(t->type, 1, "var_type");
0258     ASSERT_EQ(btf_var(t)->linkage, BTF_VAR_GLOBAL_ALLOCATED, "var_type");
0259     ASSERT_STREQ(btf_type_raw_dump(btf, 16),
0260              "[16] VAR 'var1' type_id=1, linkage=global-alloc", "raw_dump");
0261 
0262     /* DATASECT */
0263     id = btf__add_datasec(btf, "datasec1", 12);
0264     ASSERT_EQ(id, 17, "datasec_id");
0265     err = btf__add_datasec_var_info(btf, 1, 4, 8);
0266     ASSERT_OK(err, "v1_res");
0267 
0268     t = btf__type_by_id(btf, 17);
0269     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "datasec1", "datasec_name");
0270     ASSERT_EQ(t->size, 12, "datasec_sz");
0271     ASSERT_EQ(btf_kind(t), BTF_KIND_DATASEC, "datasec_kind");
0272     ASSERT_EQ(btf_vlen(t), 1, "datasec_vlen");
0273     vi = btf_var_secinfos(t) + 0;
0274     ASSERT_EQ(vi->type, 1, "v1_type");
0275     ASSERT_EQ(vi->offset, 4, "v1_off");
0276     ASSERT_EQ(vi->size, 8, "v1_sz");
0277     ASSERT_STREQ(btf_type_raw_dump(btf, 17),
0278              "[17] DATASEC 'datasec1' size=12 vlen=1\n"
0279              "\ttype_id=1 offset=4 size=8", "raw_dump");
0280 
0281     /* DECL_TAG */
0282     id = btf__add_decl_tag(btf, "tag1", 16, -1);
0283     ASSERT_EQ(id, 18, "tag_id");
0284     t = btf__type_by_id(btf, 18);
0285     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag1", "tag_value");
0286     ASSERT_EQ(btf_kind(t), BTF_KIND_DECL_TAG, "tag_kind");
0287     ASSERT_EQ(t->type, 16, "tag_type");
0288     ASSERT_EQ(btf_decl_tag(t)->component_idx, -1, "tag_component_idx");
0289     ASSERT_STREQ(btf_type_raw_dump(btf, 18),
0290              "[18] DECL_TAG 'tag1' type_id=16 component_idx=-1", "raw_dump");
0291 
0292     id = btf__add_decl_tag(btf, "tag2", 14, 1);
0293     ASSERT_EQ(id, 19, "tag_id");
0294     t = btf__type_by_id(btf, 19);
0295     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag2", "tag_value");
0296     ASSERT_EQ(btf_kind(t), BTF_KIND_DECL_TAG, "tag_kind");
0297     ASSERT_EQ(t->type, 14, "tag_type");
0298     ASSERT_EQ(btf_decl_tag(t)->component_idx, 1, "tag_component_idx");
0299     ASSERT_STREQ(btf_type_raw_dump(btf, 19),
0300              "[19] DECL_TAG 'tag2' type_id=14 component_idx=1", "raw_dump");
0301 
0302     /* TYPE_TAG */
0303     id = btf__add_type_tag(btf, "tag1", 1);
0304     ASSERT_EQ(id, 20, "tag_id");
0305     t = btf__type_by_id(btf, 20);
0306     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag1", "tag_value");
0307     ASSERT_EQ(btf_kind(t), BTF_KIND_TYPE_TAG, "tag_kind");
0308     ASSERT_EQ(t->type, 1, "tag_type");
0309     ASSERT_STREQ(btf_type_raw_dump(btf, 20),
0310              "[20] TYPE_TAG 'tag1' type_id=1", "raw_dump");
0311 
0312     /* ENUM64 */
0313     id = btf__add_enum64(btf, "e1", 8, true);
0314     ASSERT_EQ(id, 21, "enum64_id");
0315     err = btf__add_enum64_value(btf, "v1", -1);
0316     ASSERT_OK(err, "v1_res");
0317     err = btf__add_enum64_value(btf, "v2", 0x123456789); /* 4886718345 */
0318     ASSERT_OK(err, "v2_res");
0319     t = btf__type_by_id(btf, 21);
0320     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "e1", "enum64_name");
0321     ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM64, "enum64_kind");
0322     ASSERT_EQ(btf_vlen(t), 2, "enum64_vlen");
0323     ASSERT_EQ(t->size, 8, "enum64_sz");
0324     v64 = btf_enum64(t) + 0;
0325     ASSERT_STREQ(btf__str_by_offset(btf, v64->name_off), "v1", "v1_name");
0326     ASSERT_EQ(v64->val_hi32, 0xffffffff, "v1_val");
0327     ASSERT_EQ(v64->val_lo32, 0xffffffff, "v1_val");
0328     v64 = btf_enum64(t) + 1;
0329     ASSERT_STREQ(btf__str_by_offset(btf, v64->name_off), "v2", "v2_name");
0330     ASSERT_EQ(v64->val_hi32, 0x1, "v2_val");
0331     ASSERT_EQ(v64->val_lo32, 0x23456789, "v2_val");
0332     ASSERT_STREQ(btf_type_raw_dump(btf, 21),
0333              "[21] ENUM64 'e1' encoding=SIGNED size=8 vlen=2\n"
0334              "\t'v1' val=-1\n"
0335              "\t'v2' val=4886718345", "raw_dump");
0336 
0337     id = btf__add_enum64(btf, "e1", 8, false);
0338     ASSERT_EQ(id, 22, "enum64_id");
0339     err = btf__add_enum64_value(btf, "v1", 0xffffffffFFFFFFFF); /* 18446744073709551615 */
0340     ASSERT_OK(err, "v1_res");
0341     t = btf__type_by_id(btf, 22);
0342     ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "e1", "enum64_name");
0343     ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM64, "enum64_kind");
0344     ASSERT_EQ(btf_vlen(t), 1, "enum64_vlen");
0345     ASSERT_EQ(t->size, 8, "enum64_sz");
0346     v64 = btf_enum64(t) + 0;
0347     ASSERT_STREQ(btf__str_by_offset(btf, v64->name_off), "v1", "v1_name");
0348     ASSERT_EQ(v64->val_hi32, 0xffffffff, "v1_val");
0349     ASSERT_EQ(v64->val_lo32, 0xffffffff, "v1_val");
0350     ASSERT_STREQ(btf_type_raw_dump(btf, 22),
0351              "[22] ENUM64 'e1' encoding=UNSIGNED size=8 vlen=1\n"
0352              "\t'v1' val=18446744073709551615", "raw_dump");
0353 }
0354 
0355 static void test_btf_add()
0356 {
0357     struct btf *btf;
0358 
0359     btf = btf__new_empty();
0360     if (!ASSERT_OK_PTR(btf, "new_empty"))
0361         return;
0362 
0363     gen_btf(btf);
0364 
0365     VALIDATE_RAW_BTF(
0366         btf,
0367         "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
0368         "[2] PTR '(anon)' type_id=1",
0369         "[3] CONST '(anon)' type_id=5",
0370         "[4] VOLATILE '(anon)' type_id=3",
0371         "[5] RESTRICT '(anon)' type_id=4",
0372         "[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10",
0373         "[7] STRUCT 's1' size=8 vlen=2\n"
0374         "\t'f1' type_id=1 bits_offset=0\n"
0375         "\t'f2' type_id=1 bits_offset=32 bitfield_size=16",
0376         "[8] UNION 'u1' size=8 vlen=1\n"
0377         "\t'f1' type_id=1 bits_offset=0 bitfield_size=16",
0378         "[9] ENUM 'e1' encoding=UNSIGNED size=4 vlen=2\n"
0379         "\t'v1' val=1\n"
0380         "\t'v2' val=2",
0381         "[10] FWD 'struct_fwd' fwd_kind=struct",
0382         "[11] FWD 'union_fwd' fwd_kind=union",
0383         "[12] ENUM 'enum_fwd' encoding=UNSIGNED size=4 vlen=0",
0384         "[13] TYPEDEF 'typedef1' type_id=1",
0385         "[14] FUNC 'func1' type_id=15 linkage=global",
0386         "[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
0387         "\t'p1' type_id=1\n"
0388         "\t'p2' type_id=2",
0389         "[16] VAR 'var1' type_id=1, linkage=global-alloc",
0390         "[17] DATASEC 'datasec1' size=12 vlen=1\n"
0391         "\ttype_id=1 offset=4 size=8",
0392         "[18] DECL_TAG 'tag1' type_id=16 component_idx=-1",
0393         "[19] DECL_TAG 'tag2' type_id=14 component_idx=1",
0394         "[20] TYPE_TAG 'tag1' type_id=1",
0395         "[21] ENUM64 'e1' encoding=SIGNED size=8 vlen=2\n"
0396         "\t'v1' val=-1\n"
0397         "\t'v2' val=4886718345",
0398         "[22] ENUM64 'e1' encoding=UNSIGNED size=8 vlen=1\n"
0399         "\t'v1' val=18446744073709551615");
0400 
0401     btf__free(btf);
0402 }
0403 
0404 static void test_btf_add_btf()
0405 {
0406     struct btf *btf1 = NULL, *btf2 = NULL;
0407     int id;
0408 
0409     btf1 = btf__new_empty();
0410     if (!ASSERT_OK_PTR(btf1, "btf1"))
0411         return;
0412 
0413     btf2 = btf__new_empty();
0414     if (!ASSERT_OK_PTR(btf2, "btf2"))
0415         goto cleanup;
0416 
0417     gen_btf(btf1);
0418     gen_btf(btf2);
0419 
0420     id = btf__add_btf(btf1, btf2);
0421     if (!ASSERT_EQ(id, 23, "id"))
0422         goto cleanup;
0423 
0424     VALIDATE_RAW_BTF(
0425         btf1,
0426         "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
0427         "[2] PTR '(anon)' type_id=1",
0428         "[3] CONST '(anon)' type_id=5",
0429         "[4] VOLATILE '(anon)' type_id=3",
0430         "[5] RESTRICT '(anon)' type_id=4",
0431         "[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10",
0432         "[7] STRUCT 's1' size=8 vlen=2\n"
0433         "\t'f1' type_id=1 bits_offset=0\n"
0434         "\t'f2' type_id=1 bits_offset=32 bitfield_size=16",
0435         "[8] UNION 'u1' size=8 vlen=1\n"
0436         "\t'f1' type_id=1 bits_offset=0 bitfield_size=16",
0437         "[9] ENUM 'e1' encoding=UNSIGNED size=4 vlen=2\n"
0438         "\t'v1' val=1\n"
0439         "\t'v2' val=2",
0440         "[10] FWD 'struct_fwd' fwd_kind=struct",
0441         "[11] FWD 'union_fwd' fwd_kind=union",
0442         "[12] ENUM 'enum_fwd' encoding=UNSIGNED size=4 vlen=0",
0443         "[13] TYPEDEF 'typedef1' type_id=1",
0444         "[14] FUNC 'func1' type_id=15 linkage=global",
0445         "[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
0446         "\t'p1' type_id=1\n"
0447         "\t'p2' type_id=2",
0448         "[16] VAR 'var1' type_id=1, linkage=global-alloc",
0449         "[17] DATASEC 'datasec1' size=12 vlen=1\n"
0450         "\ttype_id=1 offset=4 size=8",
0451         "[18] DECL_TAG 'tag1' type_id=16 component_idx=-1",
0452         "[19] DECL_TAG 'tag2' type_id=14 component_idx=1",
0453         "[20] TYPE_TAG 'tag1' type_id=1",
0454         "[21] ENUM64 'e1' encoding=SIGNED size=8 vlen=2\n"
0455         "\t'v1' val=-1\n"
0456         "\t'v2' val=4886718345",
0457         "[22] ENUM64 'e1' encoding=UNSIGNED size=8 vlen=1\n"
0458         "\t'v1' val=18446744073709551615",
0459 
0460         /* types appended from the second BTF */
0461         "[23] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
0462         "[24] PTR '(anon)' type_id=23",
0463         "[25] CONST '(anon)' type_id=27",
0464         "[26] VOLATILE '(anon)' type_id=25",
0465         "[27] RESTRICT '(anon)' type_id=26",
0466         "[28] ARRAY '(anon)' type_id=24 index_type_id=23 nr_elems=10",
0467         "[29] STRUCT 's1' size=8 vlen=2\n"
0468         "\t'f1' type_id=23 bits_offset=0\n"
0469         "\t'f2' type_id=23 bits_offset=32 bitfield_size=16",
0470         "[30] UNION 'u1' size=8 vlen=1\n"
0471         "\t'f1' type_id=23 bits_offset=0 bitfield_size=16",
0472         "[31] ENUM 'e1' encoding=UNSIGNED size=4 vlen=2\n"
0473         "\t'v1' val=1\n"
0474         "\t'v2' val=2",
0475         "[32] FWD 'struct_fwd' fwd_kind=struct",
0476         "[33] FWD 'union_fwd' fwd_kind=union",
0477         "[34] ENUM 'enum_fwd' encoding=UNSIGNED size=4 vlen=0",
0478         "[35] TYPEDEF 'typedef1' type_id=23",
0479         "[36] FUNC 'func1' type_id=37 linkage=global",
0480         "[37] FUNC_PROTO '(anon)' ret_type_id=23 vlen=2\n"
0481         "\t'p1' type_id=23\n"
0482         "\t'p2' type_id=24",
0483         "[38] VAR 'var1' type_id=23, linkage=global-alloc",
0484         "[39] DATASEC 'datasec1' size=12 vlen=1\n"
0485         "\ttype_id=23 offset=4 size=8",
0486         "[40] DECL_TAG 'tag1' type_id=38 component_idx=-1",
0487         "[41] DECL_TAG 'tag2' type_id=36 component_idx=1",
0488         "[42] TYPE_TAG 'tag1' type_id=23",
0489         "[43] ENUM64 'e1' encoding=SIGNED size=8 vlen=2\n"
0490         "\t'v1' val=-1\n"
0491         "\t'v2' val=4886718345",
0492         "[44] ENUM64 'e1' encoding=UNSIGNED size=8 vlen=1\n"
0493         "\t'v1' val=18446744073709551615");
0494 
0495 cleanup:
0496     btf__free(btf1);
0497     btf__free(btf2);
0498 }
0499 
0500 void test_btf_write()
0501 {
0502     if (test__start_subtest("btf_add"))
0503         test_btf_add();
0504     if (test__start_subtest("btf_add_btf"))
0505         test_btf_add_btf();
0506 }
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