1
2
3#include <test_progs.h>
4#include <bpf/btf.h>
5#include "btf_helpers.h"
6
7static int duration = 0;
8
9void test_btf_write() {
10 const struct btf_var_secinfo *vi;
11 const struct btf_type *t;
12 const struct btf_member *m;
13 const struct btf_enum *v;
14 const struct btf_param *p;
15 struct btf *btf;
16 int id, err, str_off;
17
18 btf = btf__new_empty();
19 if (CHECK(IS_ERR(btf), "new_empty", "failed: %ld\n", PTR_ERR(btf)))
20 return;
21
22 str_off = btf__find_str(btf, "int");
23 ASSERT_EQ(str_off, -ENOENT, "int_str_missing_off");
24
25 str_off = btf__add_str(btf, "int");
26 ASSERT_EQ(str_off, 1, "int_str_off");
27
28 str_off = btf__find_str(btf, "int");
29 ASSERT_EQ(str_off, 1, "int_str_found_off");
30
31
32 id = btf__add_int(btf, "int", 4, BTF_INT_SIGNED);
33 ASSERT_EQ(id, 1, "int_id");
34
35 t = btf__type_by_id(btf, 1);
36
37 ASSERT_EQ(t->name_off, str_off, "int_name_off");
38 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "int", "int_name");
39 ASSERT_EQ(btf_kind(t), BTF_KIND_INT, "int_kind");
40 ASSERT_EQ(t->size, 4, "int_sz");
41 ASSERT_EQ(btf_int_encoding(t), BTF_INT_SIGNED, "int_enc");
42 ASSERT_EQ(btf_int_bits(t), 32, "int_bits");
43 ASSERT_STREQ(btf_type_raw_dump(btf, 1),
44 "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "raw_dump");
45
46
47 id = btf__add_int(btf, "bad sz int", 7, 0);
48 ASSERT_ERR(id, "int_bad_sz");
49
50 id = btf__add_int(btf, "bad enc int", 4, 123);
51 ASSERT_ERR(id, "int_bad_enc");
52
53 id = btf__add_int(btf, NULL, 4, 0);
54 ASSERT_ERR(id, "int_bad_null_name");
55
56 id = btf__add_int(btf, "", 4, 0);
57 ASSERT_ERR(id, "int_bad_empty_name");
58
59
60 id = btf__add_ptr(btf, 1);
61 ASSERT_EQ(id, 2, "ptr_id");
62 t = btf__type_by_id(btf, 2);
63 ASSERT_EQ(btf_kind(t), BTF_KIND_PTR, "ptr_kind");
64 ASSERT_EQ(t->type, 1, "ptr_type");
65 ASSERT_STREQ(btf_type_raw_dump(btf, 2),
66 "[2] PTR '(anon)' type_id=1", "raw_dump");
67
68 id = btf__add_const(btf, 5);
69 ASSERT_EQ(id, 3, "const_id");
70 t = btf__type_by_id(btf, 3);
71 ASSERT_EQ(btf_kind(t), BTF_KIND_CONST, "const_kind");
72 ASSERT_EQ(t->type, 5, "const_type");
73 ASSERT_STREQ(btf_type_raw_dump(btf, 3),
74 "[3] CONST '(anon)' type_id=5", "raw_dump");
75
76 id = btf__add_volatile(btf, 3);
77 ASSERT_EQ(id, 4, "volatile_id");
78 t = btf__type_by_id(btf, 4);
79 ASSERT_EQ(btf_kind(t), BTF_KIND_VOLATILE, "volatile_kind");
80 ASSERT_EQ(t->type, 3, "volatile_type");
81 ASSERT_STREQ(btf_type_raw_dump(btf, 4),
82 "[4] VOLATILE '(anon)' type_id=3", "raw_dump");
83
84 id = btf__add_restrict(btf, 4);
85 ASSERT_EQ(id, 5, "restrict_id");
86 t = btf__type_by_id(btf, 5);
87 ASSERT_EQ(btf_kind(t), BTF_KIND_RESTRICT, "restrict_kind");
88 ASSERT_EQ(t->type, 4, "restrict_type");
89 ASSERT_STREQ(btf_type_raw_dump(btf, 5),
90 "[5] RESTRICT '(anon)' type_id=4", "raw_dump");
91
92
93 id = btf__add_array(btf, 1, 2, 10);
94 ASSERT_EQ(id, 6, "array_id");
95 t = btf__type_by_id(btf, 6);
96 ASSERT_EQ(btf_kind(t), BTF_KIND_ARRAY, "array_kind");
97 ASSERT_EQ(btf_array(t)->index_type, 1, "array_index_type");
98 ASSERT_EQ(btf_array(t)->type, 2, "array_elem_type");
99 ASSERT_EQ(btf_array(t)->nelems, 10, "array_nelems");
100 ASSERT_STREQ(btf_type_raw_dump(btf, 6),
101 "[6] ARRAY '(anon)' type_id=2 index_type_id=1 nr_elems=10", "raw_dump");
102
103
104 err = btf__add_field(btf, "field", 1, 0, 0);
105 ASSERT_ERR(err, "no_struct_field");
106 id = btf__add_struct(btf, "s1", 8);
107 ASSERT_EQ(id, 7, "struct_id");
108 err = btf__add_field(btf, "f1", 1, 0, 0);
109 ASSERT_OK(err, "f1_res");
110 err = btf__add_field(btf, "f2", 1, 32, 16);
111 ASSERT_OK(err, "f2_res");
112
113 t = btf__type_by_id(btf, 7);
114 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "s1", "struct_name");
115 ASSERT_EQ(btf_kind(t), BTF_KIND_STRUCT, "struct_kind");
116 ASSERT_EQ(btf_vlen(t), 2, "struct_vlen");
117 ASSERT_EQ(btf_kflag(t), true, "struct_kflag");
118 ASSERT_EQ(t->size, 8, "struct_sz");
119 m = btf_members(t) + 0;
120 ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name");
121 ASSERT_EQ(m->type, 1, "f1_type");
122 ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off");
123 ASSERT_EQ(btf_member_bitfield_size(t, 0), 0, "f1_bit_sz");
124 m = btf_members(t) + 1;
125 ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f2", "f2_name");
126 ASSERT_EQ(m->type, 1, "f2_type");
127 ASSERT_EQ(btf_member_bit_offset(t, 1), 32, "f2_bit_off");
128 ASSERT_EQ(btf_member_bitfield_size(t, 1), 16, "f2_bit_sz");
129 ASSERT_STREQ(btf_type_raw_dump(btf, 7),
130 "[7] STRUCT 's1' size=8 vlen=2\n"
131 "\t'f1' type_id=1 bits_offset=0\n"
132 "\t'f2' type_id=1 bits_offset=32 bitfield_size=16", "raw_dump");
133
134
135 id = btf__add_union(btf, "u1", 8);
136 ASSERT_EQ(id, 8, "union_id");
137
138
139 err = btf__add_field(btf, "field", 1, 1, 0);
140 ASSERT_ERR(err, "no_struct_field");
141
142 err = btf__add_field(btf, "f1", 1, 0, 16);
143 ASSERT_OK(err, "f1_res");
144
145 t = btf__type_by_id(btf, 8);
146 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "u1", "union_name");
147 ASSERT_EQ(btf_kind(t), BTF_KIND_UNION, "union_kind");
148 ASSERT_EQ(btf_vlen(t), 1, "union_vlen");
149 ASSERT_EQ(btf_kflag(t), true, "union_kflag");
150 ASSERT_EQ(t->size, 8, "union_sz");
151 m = btf_members(t) + 0;
152 ASSERT_STREQ(btf__str_by_offset(btf, m->name_off), "f1", "f1_name");
153 ASSERT_EQ(m->type, 1, "f1_type");
154 ASSERT_EQ(btf_member_bit_offset(t, 0), 0, "f1_bit_off");
155 ASSERT_EQ(btf_member_bitfield_size(t, 0), 16, "f1_bit_sz");
156 ASSERT_STREQ(btf_type_raw_dump(btf, 8),
157 "[8] UNION 'u1' size=8 vlen=1\n"
158 "\t'f1' type_id=1 bits_offset=0 bitfield_size=16", "raw_dump");
159
160
161 id = btf__add_enum(btf, "e1", 4);
162 ASSERT_EQ(id, 9, "enum_id");
163 err = btf__add_enum_value(btf, "v1", 1);
164 ASSERT_OK(err, "v1_res");
165 err = btf__add_enum_value(btf, "v2", 2);
166 ASSERT_OK(err, "v2_res");
167
168 t = btf__type_by_id(btf, 9);
169 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "e1", "enum_name");
170 ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_kind");
171 ASSERT_EQ(btf_vlen(t), 2, "enum_vlen");
172 ASSERT_EQ(t->size, 4, "enum_sz");
173 v = btf_enum(t) + 0;
174 ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v1", "v1_name");
175 ASSERT_EQ(v->val, 1, "v1_val");
176 v = btf_enum(t) + 1;
177 ASSERT_STREQ(btf__str_by_offset(btf, v->name_off), "v2", "v2_name");
178 ASSERT_EQ(v->val, 2, "v2_val");
179 ASSERT_STREQ(btf_type_raw_dump(btf, 9),
180 "[9] ENUM 'e1' size=4 vlen=2\n"
181 "\t'v1' val=1\n"
182 "\t'v2' val=2", "raw_dump");
183
184
185 id = btf__add_fwd(btf, "struct_fwd", BTF_FWD_STRUCT);
186 ASSERT_EQ(id, 10, "struct_fwd_id");
187 t = btf__type_by_id(btf, 10);
188 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "struct_fwd", "fwd_name");
189 ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind");
190 ASSERT_EQ(btf_kflag(t), 0, "fwd_kflag");
191 ASSERT_STREQ(btf_type_raw_dump(btf, 10),
192 "[10] FWD 'struct_fwd' fwd_kind=struct", "raw_dump");
193
194 id = btf__add_fwd(btf, "union_fwd", BTF_FWD_UNION);
195 ASSERT_EQ(id, 11, "union_fwd_id");
196 t = btf__type_by_id(btf, 11);
197 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "union_fwd", "fwd_name");
198 ASSERT_EQ(btf_kind(t), BTF_KIND_FWD, "fwd_kind");
199 ASSERT_EQ(btf_kflag(t), 1, "fwd_kflag");
200 ASSERT_STREQ(btf_type_raw_dump(btf, 11),
201 "[11] FWD 'union_fwd' fwd_kind=union", "raw_dump");
202
203 id = btf__add_fwd(btf, "enum_fwd", BTF_FWD_ENUM);
204 ASSERT_EQ(id, 12, "enum_fwd_id");
205 t = btf__type_by_id(btf, 12);
206 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "enum_fwd", "fwd_name");
207 ASSERT_EQ(btf_kind(t), BTF_KIND_ENUM, "enum_fwd_kind");
208 ASSERT_EQ(btf_vlen(t), 0, "enum_fwd_kind");
209 ASSERT_EQ(t->size, 4, "enum_fwd_sz");
210 ASSERT_STREQ(btf_type_raw_dump(btf, 12),
211 "[12] ENUM 'enum_fwd' size=4 vlen=0", "raw_dump");
212
213
214 id = btf__add_typedef(btf, "typedef1", 1);
215 ASSERT_EQ(id, 13, "typedef_fwd_id");
216 t = btf__type_by_id(btf, 13);
217 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "typedef1", "typedef_name");
218 ASSERT_EQ(btf_kind(t), BTF_KIND_TYPEDEF, "typedef_kind");
219 ASSERT_EQ(t->type, 1, "typedef_type");
220 ASSERT_STREQ(btf_type_raw_dump(btf, 13),
221 "[13] TYPEDEF 'typedef1' type_id=1", "raw_dump");
222
223
224 id = btf__add_func(btf, "func1", BTF_FUNC_GLOBAL, 15);
225 ASSERT_EQ(id, 14, "func_id");
226 t = btf__type_by_id(btf, 14);
227 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "func1", "func_name");
228 ASSERT_EQ(t->type, 15, "func_type");
229 ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC, "func_kind");
230 ASSERT_EQ(btf_vlen(t), BTF_FUNC_GLOBAL, "func_vlen");
231 ASSERT_STREQ(btf_type_raw_dump(btf, 14),
232 "[14] FUNC 'func1' type_id=15 linkage=global", "raw_dump");
233
234 id = btf__add_func_proto(btf, 1);
235 ASSERT_EQ(id, 15, "func_proto_id");
236 err = btf__add_func_param(btf, "p1", 1);
237 ASSERT_OK(err, "p1_res");
238 err = btf__add_func_param(btf, "p2", 2);
239 ASSERT_OK(err, "p2_res");
240
241 t = btf__type_by_id(btf, 15);
242 ASSERT_EQ(btf_kind(t), BTF_KIND_FUNC_PROTO, "func_proto_kind");
243 ASSERT_EQ(btf_vlen(t), 2, "func_proto_vlen");
244 ASSERT_EQ(t->type, 1, "func_proto_ret_type");
245 p = btf_params(t) + 0;
246 ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p1", "p1_name");
247 ASSERT_EQ(p->type, 1, "p1_type");
248 p = btf_params(t) + 1;
249 ASSERT_STREQ(btf__str_by_offset(btf, p->name_off), "p2", "p2_name");
250 ASSERT_EQ(p->type, 2, "p2_type");
251 ASSERT_STREQ(btf_type_raw_dump(btf, 15),
252 "[15] FUNC_PROTO '(anon)' ret_type_id=1 vlen=2\n"
253 "\t'p1' type_id=1\n"
254 "\t'p2' type_id=2", "raw_dump");
255
256
257 id = btf__add_var(btf, "var1", BTF_VAR_GLOBAL_ALLOCATED, 1);
258 ASSERT_EQ(id, 16, "var_id");
259 t = btf__type_by_id(btf, 16);
260 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "var1", "var_name");
261 ASSERT_EQ(btf_kind(t), BTF_KIND_VAR, "var_kind");
262 ASSERT_EQ(t->type, 1, "var_type");
263 ASSERT_EQ(btf_var(t)->linkage, BTF_VAR_GLOBAL_ALLOCATED, "var_type");
264 ASSERT_STREQ(btf_type_raw_dump(btf, 16),
265 "[16] VAR 'var1' type_id=1, linkage=global-alloc", "raw_dump");
266
267
268 id = btf__add_datasec(btf, "datasec1", 12);
269 ASSERT_EQ(id, 17, "datasec_id");
270 err = btf__add_datasec_var_info(btf, 1, 4, 8);
271 ASSERT_OK(err, "v1_res");
272
273 t = btf__type_by_id(btf, 17);
274 ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "datasec1", "datasec_name");
275 ASSERT_EQ(t->size, 12, "datasec_sz");
276 ASSERT_EQ(btf_kind(t), BTF_KIND_DATASEC, "datasec_kind");
277 ASSERT_EQ(btf_vlen(t), 1, "datasec_vlen");
278 vi = btf_var_secinfos(t) + 0;
279 ASSERT_EQ(vi->type, 1, "v1_type");
280 ASSERT_EQ(vi->offset, 4, "v1_off");
281 ASSERT_EQ(vi->size, 8, "v1_sz");
282 ASSERT_STREQ(btf_type_raw_dump(btf, 17),
283 "[17] DATASEC 'datasec1' size=12 vlen=1\n"
284 "\ttype_id=1 offset=4 size=8", "raw_dump");
285
286 btf__free(btf);
287}
288
