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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 | // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020 Facebook */ #include <test_progs.h> #include <bpf/btf.h> #include "btf_helpers.h" static void test_split_simple() { const struct btf_type *t; struct btf *btf1, *btf2; int str_off, err; btf1 = btf__new_empty(); if (!ASSERT_OK_PTR(btf1, "empty_main_btf")) return; btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */ btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */ btf__add_ptr(btf1, 1); /* [2] ptr to int */ btf__add_struct(btf1, "s1", 4); /* [3] struct s1 { */ btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */ /* } */ VALIDATE_RAW_BTF( btf1, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=1", "[3] STRUCT 's1' size=4 vlen=1\n" "\t'f1' type_id=1 bits_offset=0"); ASSERT_STREQ(btf_type_c_dump(btf1), "\ struct s1 {\n\ int f1;\n\ };\n\n", "c_dump"); btf2 = btf__new_empty_split(btf1); if (!ASSERT_OK_PTR(btf2, "empty_split_btf")) goto cleanup; /* pointer size should be "inherited" from main BTF */ ASSERT_EQ(btf__pointer_size(btf2), 8, "inherit_ptr_sz"); str_off = btf__find_str(btf2, "int"); ASSERT_NEQ(str_off, -ENOENT, "str_int_missing"); t = btf__type_by_id(btf2, 1); if (!ASSERT_OK_PTR(t, "int_type")) goto cleanup; ASSERT_EQ(btf_is_int(t), true, "int_kind"); ASSERT_STREQ(btf__str_by_offset(btf2, t->name_off), "int", "int_name"); btf__add_struct(btf2, "s2", 16); /* [4] struct s2 { */ btf__add_field(btf2, "f1", 6, 0, 0); /* struct s1 f1; */ btf__add_field(btf2, "f2", 5, 32, 0); /* int f2; */ btf__add_field(btf2, "f3", 2, 64, 0); /* int *f3; */ /* } */ /* duplicated int */ btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [5] int */ /* duplicated struct s1 */ btf__add_struct(btf2, "s1", 4); /* [6] struct s1 { */ btf__add_field(btf2, "f1", 5, 0, 0); /* int f1; */ /* } */ VALIDATE_RAW_BTF( btf2, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=1", "[3] STRUCT 's1' size=4 vlen=1\n" "\t'f1' type_id=1 bits_offset=0", "[4] STRUCT 's2' size=16 vlen=3\n" "\t'f1' type_id=6 bits_offset=0\n" "\t'f2' type_id=5 bits_offset=32\n" "\t'f3' type_id=2 bits_offset=64", "[5] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[6] STRUCT 's1' size=4 vlen=1\n" "\t'f1' type_id=5 bits_offset=0"); ASSERT_STREQ(btf_type_c_dump(btf2), "\ struct s1 {\n\ int f1;\n\ };\n\ \n\ struct s1___2 {\n\ int f1;\n\ };\n\ \n\ struct s2 {\n\ struct s1___2 f1;\n\ int f2;\n\ int *f3;\n\ };\n\n", "c_dump"); err = btf__dedup(btf2, NULL, NULL); if (!ASSERT_OK(err, "btf_dedup")) goto cleanup; VALIDATE_RAW_BTF( btf2, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=1", "[3] STRUCT 's1' size=4 vlen=1\n" "\t'f1' type_id=1 bits_offset=0", "[4] STRUCT 's2' size=16 vlen=3\n" "\t'f1' type_id=3 bits_offset=0\n" "\t'f2' type_id=1 bits_offset=32\n" "\t'f3' type_id=2 bits_offset=64"); ASSERT_STREQ(btf_type_c_dump(btf2), "\ struct s1 {\n\ int f1;\n\ };\n\ \n\ struct s2 {\n\ struct s1 f1;\n\ int f2;\n\ int *f3;\n\ };\n\n", "c_dump"); cleanup: btf__free(btf2); btf__free(btf1); } static void test_split_fwd_resolve() { struct btf *btf1, *btf2; int err; btf1 = btf__new_empty(); if (!ASSERT_OK_PTR(btf1, "empty_main_btf")) return; btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */ btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */ btf__add_ptr(btf1, 4); /* [2] ptr to struct s1 */ btf__add_ptr(btf1, 5); /* [3] ptr to struct s2 */ btf__add_struct(btf1, "s1", 16); /* [4] struct s1 { */ btf__add_field(btf1, "f1", 2, 0, 0); /* struct s1 *f1; */ btf__add_field(btf1, "f2", 3, 64, 0); /* struct s2 *f2; */ /* } */ btf__add_struct(btf1, "s2", 4); /* [5] struct s2 { */ btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */ /* } */ VALIDATE_RAW_BTF( btf1, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=4", "[3] PTR '(anon)' type_id=5", "[4] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=2 bits_offset=0\n" "\t'f2' type_id=3 bits_offset=64", "[5] STRUCT 's2' size=4 vlen=1\n" "\t'f1' type_id=1 bits_offset=0"); btf2 = btf__new_empty_split(btf1); if (!ASSERT_OK_PTR(btf2, "empty_split_btf")) goto cleanup; btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [6] int */ btf__add_ptr(btf2, 10); /* [7] ptr to struct s1 */ btf__add_fwd(btf2, "s2", BTF_FWD_STRUCT); /* [8] fwd for struct s2 */ btf__add_ptr(btf2, 8); /* [9] ptr to fwd struct s2 */ btf__add_struct(btf2, "s1", 16); /* [10] struct s1 { */ btf__add_field(btf2, "f1", 7, 0, 0); /* struct s1 *f1; */ btf__add_field(btf2, "f2", 9, 64, 0); /* struct s2 *f2; */ /* } */ VALIDATE_RAW_BTF( btf2, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=4", "[3] PTR '(anon)' type_id=5", "[4] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=2 bits_offset=0\n" "\t'f2' type_id=3 bits_offset=64", "[5] STRUCT 's2' size=4 vlen=1\n" "\t'f1' type_id=1 bits_offset=0", "[6] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[7] PTR '(anon)' type_id=10", "[8] FWD 's2' fwd_kind=struct", "[9] PTR '(anon)' type_id=8", "[10] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=7 bits_offset=0\n" "\t'f2' type_id=9 bits_offset=64"); err = btf__dedup(btf2, NULL, NULL); if (!ASSERT_OK(err, "btf_dedup")) goto cleanup; VALIDATE_RAW_BTF( btf2, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=4", "[3] PTR '(anon)' type_id=5", "[4] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=2 bits_offset=0\n" "\t'f2' type_id=3 bits_offset=64", "[5] STRUCT 's2' size=4 vlen=1\n" "\t'f1' type_id=1 bits_offset=0"); cleanup: btf__free(btf2); btf__free(btf1); } static void test_split_struct_duped() { struct btf *btf1, *btf2; int err; btf1 = btf__new_empty(); if (!ASSERT_OK_PTR(btf1, "empty_main_btf")) return; btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */ btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */ btf__add_ptr(btf1, 5); /* [2] ptr to struct s1 */ btf__add_fwd(btf1, "s2", BTF_FWD_STRUCT); /* [3] fwd for struct s2 */ btf__add_ptr(btf1, 3); /* [4] ptr to fwd struct s2 */ btf__add_struct(btf1, "s1", 16); /* [5] struct s1 { */ btf__add_field(btf1, "f1", 2, 0, 0); /* struct s1 *f1; */ btf__add_field(btf1, "f2", 4, 64, 0); /* struct s2 *f2; */ /* } */ VALIDATE_RAW_BTF( btf1, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=5", "[3] FWD 's2' fwd_kind=struct", "[4] PTR '(anon)' type_id=3", "[5] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=2 bits_offset=0\n" "\t'f2' type_id=4 bits_offset=64"); btf2 = btf__new_empty_split(btf1); if (!ASSERT_OK_PTR(btf2, "empty_split_btf")) goto cleanup; btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [6] int */ btf__add_ptr(btf2, 10); /* [7] ptr to struct s1 */ btf__add_fwd(btf2, "s2", BTF_FWD_STRUCT); /* [8] fwd for struct s2 */ btf__add_ptr(btf2, 11); /* [9] ptr to struct s2 */ btf__add_struct(btf2, "s1", 16); /* [10] struct s1 { */ btf__add_field(btf2, "f1", 7, 0, 0); /* struct s1 *f1; */ btf__add_field(btf2, "f2", 9, 64, 0); /* struct s2 *f2; */ /* } */ btf__add_struct(btf2, "s2", 40); /* [11] struct s2 { */ btf__add_field(btf2, "f1", 7, 0, 0); /* struct s1 *f1; */ btf__add_field(btf2, "f2", 9, 64, 0); /* struct s2 *f2; */ btf__add_field(btf2, "f3", 6, 128, 0); /* int f3; */ btf__add_field(btf2, "f4", 10, 192, 0); /* struct s1 f4; */ /* } */ btf__add_ptr(btf2, 8); /* [12] ptr to fwd struct s2 */ btf__add_struct(btf2, "s3", 8); /* [13] struct s3 { */ btf__add_field(btf2, "f1", 12, 0, 0); /* struct s2 *f1; (fwd) */ /* } */ VALIDATE_RAW_BTF( btf2, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=5", "[3] FWD 's2' fwd_kind=struct", "[4] PTR '(anon)' type_id=3", "[5] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=2 bits_offset=0\n" "\t'f2' type_id=4 bits_offset=64", "[6] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[7] PTR '(anon)' type_id=10", "[8] FWD 's2' fwd_kind=struct", "[9] PTR '(anon)' type_id=11", "[10] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=7 bits_offset=0\n" "\t'f2' type_id=9 bits_offset=64", "[11] STRUCT 's2' size=40 vlen=4\n" "\t'f1' type_id=7 bits_offset=0\n" "\t'f2' type_id=9 bits_offset=64\n" "\t'f3' type_id=6 bits_offset=128\n" "\t'f4' type_id=10 bits_offset=192", "[12] PTR '(anon)' type_id=8", "[13] STRUCT 's3' size=8 vlen=1\n" "\t'f1' type_id=12 bits_offset=0"); err = btf__dedup(btf2, NULL, NULL); if (!ASSERT_OK(err, "btf_dedup")) goto cleanup; VALIDATE_RAW_BTF( btf2, "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED", "[2] PTR '(anon)' type_id=5", "[3] FWD 's2' fwd_kind=struct", "[4] PTR '(anon)' type_id=3", "[5] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=2 bits_offset=0\n" "\t'f2' type_id=4 bits_offset=64", "[6] PTR '(anon)' type_id=8", "[7] PTR '(anon)' type_id=9", "[8] STRUCT 's1' size=16 vlen=2\n" "\t'f1' type_id=6 bits_offset=0\n" "\t'f2' type_id=7 bits_offset=64", "[9] STRUCT 's2' size=40 vlen=4\n" "\t'f1' type_id=6 bits_offset=0\n" "\t'f2' type_id=7 bits_offset=64\n" "\t'f3' type_id=1 bits_offset=128\n" "\t'f4' type_id=8 bits_offset=192", "[10] STRUCT 's3' size=8 vlen=1\n" "\t'f1' type_id=7 bits_offset=0"); cleanup: btf__free(btf2); btf__free(btf1); } void test_btf_dedup_split() { if (test__start_subtest("split_simple")) test_split_simple(); if (test__start_subtest("split_struct_duped")) test_split_struct_duped(); if (test__start_subtest("split_fwd_resolve")) test_split_fwd_resolve(); } |