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