| 1 | /* |
| 2 | * ctf-visitor-semantic-validator.c |
| 3 | * |
| 4 | * Common Trace Format Metadata Semantic Validator. |
| 5 | * |
| 6 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | * of this software and associated documentation files (the "Software"), to deal |
| 10 | * in the Software without restriction, including without limitation the rights |
| 11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | * copies of the Software, and to permit persons to whom the Software is |
| 13 | * furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be included in |
| 16 | * all copies or substantial portions of the Software. |
| 17 | */ |
| 18 | |
| 19 | #include <stdio.h> |
| 20 | #include <unistd.h> |
| 21 | #include <string.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <assert.h> |
| 24 | #include <glib.h> |
| 25 | #include <inttypes.h> |
| 26 | #include <errno.h> |
| 27 | #include <babeltrace/babeltrace.h> |
| 28 | #include <babeltrace/list.h> |
| 29 | #include "ctf-scanner.h" |
| 30 | #include "ctf-parser.h" |
| 31 | #include "ctf-ast.h" |
| 32 | |
| 33 | #define _cds_list_first_entry(ptr, type, member) \ |
| 34 | cds_list_entry((ptr)->next, type, member) |
| 35 | |
| 36 | #define fprintf_dbg(fd, fmt, args...) fprintf(fd, "%s: " fmt, __func__, ## args) |
| 37 | |
| 38 | static |
| 39 | int _ctf_visitor_semantic_check(FILE *fd, int depth, struct ctf_node *node); |
| 40 | |
| 41 | static |
| 42 | int ctf_visitor_unary_expression(FILE *fd, int depth, struct ctf_node *node) |
| 43 | { |
| 44 | struct ctf_node *iter; |
| 45 | int is_ctf_exp = 0, is_ctf_exp_left = 0; |
| 46 | |
| 47 | switch (node->parent->type) { |
| 48 | case NODE_CTF_EXPRESSION: |
| 49 | is_ctf_exp = 1; |
| 50 | cds_list_for_each_entry(iter, &node->parent->u.ctf_expression.left, |
| 51 | siblings) { |
| 52 | if (iter == node) { |
| 53 | is_ctf_exp_left = 1; |
| 54 | /* |
| 55 | * We are a left child of a ctf expression. |
| 56 | * We are only allowed to be a string. |
| 57 | */ |
| 58 | if (node->u.unary_expression.type != UNARY_STRING) { |
| 59 | fprintf(fd, "[error]: semantic error (left child of a ctf expression is only allowed to be a string)\n"); |
| 60 | |
| 61 | goto errperm; |
| 62 | } |
| 63 | break; |
| 64 | } |
| 65 | } |
| 66 | /* Right child of a ctf expression can be any type of unary exp. */ |
| 67 | break; /* OK */ |
| 68 | case NODE_TYPE_DECLARATOR: |
| 69 | /* |
| 70 | * We are the length of a type declarator. |
| 71 | */ |
| 72 | switch (node->u.unary_expression.type) { |
| 73 | case UNARY_UNSIGNED_CONSTANT: |
| 74 | break; |
| 75 | default: |
| 76 | fprintf(fd, "[error]: semantic error (children of type declarator and enum can only be unsigned numeric constants)\n"); |
| 77 | goto errperm; |
| 78 | } |
| 79 | break; /* OK */ |
| 80 | |
| 81 | case NODE_STRUCT: |
| 82 | /* |
| 83 | * We are the size of a struct align attribute. |
| 84 | */ |
| 85 | switch (node->u.unary_expression.type) { |
| 86 | case UNARY_UNSIGNED_CONSTANT: |
| 87 | break; |
| 88 | default: |
| 89 | fprintf(fd, "[error]: semantic error (structure alignment attribute can only be unsigned numeric constants)\n"); |
| 90 | goto errperm; |
| 91 | } |
| 92 | break; |
| 93 | |
| 94 | case NODE_ENUMERATOR: |
| 95 | /* The enumerator's parent has validated its validity already. */ |
| 96 | break; /* OK */ |
| 97 | |
| 98 | case NODE_UNARY_EXPRESSION: |
| 99 | /* |
| 100 | * We disallow nested unary expressions and "sbrac" unary |
| 101 | * expressions. |
| 102 | */ |
| 103 | fprintf(fd, "[error]: semantic error (nested unary expressions not allowed ( () and [] ))\n"); |
| 104 | goto errperm; |
| 105 | |
| 106 | case NODE_ROOT: |
| 107 | case NODE_EVENT: |
| 108 | case NODE_STREAM: |
| 109 | case NODE_TRACE: |
| 110 | case NODE_TYPEDEF: |
| 111 | case NODE_TYPEALIAS_TARGET: |
| 112 | case NODE_TYPEALIAS_ALIAS: |
| 113 | case NODE_TYPEALIAS: |
| 114 | case NODE_TYPE_SPECIFIER: |
| 115 | case NODE_POINTER: |
| 116 | case NODE_FLOATING_POINT: |
| 117 | case NODE_INTEGER: |
| 118 | case NODE_STRING: |
| 119 | case NODE_ENUM: |
| 120 | case NODE_STRUCT_OR_VARIANT_DECLARATION: |
| 121 | case NODE_VARIANT: |
| 122 | default: |
| 123 | goto errinval; |
| 124 | } |
| 125 | |
| 126 | switch (node->u.unary_expression.link) { |
| 127 | case UNARY_LINK_UNKNOWN: |
| 128 | /* We don't allow empty link except on the first node of the list */ |
| 129 | if (is_ctf_exp && _cds_list_first_entry(is_ctf_exp_left ? |
| 130 | &node->parent->u.ctf_expression.left : |
| 131 | &node->parent->u.ctf_expression.right, |
| 132 | struct ctf_node, |
| 133 | siblings) != node) { |
| 134 | fprintf(fd, "[error]: semantic error (empty link not allowed except on first node of unary expression (need to separate nodes with \".\" or \"->\")\n"); |
| 135 | goto errperm; |
| 136 | } |
| 137 | break; /* OK */ |
| 138 | case UNARY_DOTLINK: |
| 139 | case UNARY_ARROWLINK: |
| 140 | /* We only allow -> and . links between children of ctf_expression. */ |
| 141 | if (node->parent->type != NODE_CTF_EXPRESSION) { |
| 142 | fprintf(fd, "[error]: semantic error (links \".\" and \"->\" are only allowed as children of ctf expression)\n"); |
| 143 | goto errperm; |
| 144 | } |
| 145 | /* |
| 146 | * Only strings can be separated linked by . or ->. |
| 147 | * This includes "", '' and non-quoted identifiers. |
| 148 | */ |
| 149 | if (node->u.unary_expression.type != UNARY_STRING) { |
| 150 | fprintf(fd, "[error]: semantic error (links \".\" and \"->\" are only allowed to separate strings and identifiers)\n"); |
| 151 | goto errperm; |
| 152 | } |
| 153 | /* We don't allow link on the first node of the list */ |
| 154 | if (is_ctf_exp && _cds_list_first_entry(is_ctf_exp_left ? |
| 155 | &node->parent->u.ctf_expression.left : |
| 156 | &node->parent->u.ctf_expression.right, |
| 157 | struct ctf_node, |
| 158 | siblings) == node) { |
| 159 | fprintf(fd, "[error]: semantic error (links \".\" and \"->\" are not allowed before first node of the unary expression list)\n"); |
| 160 | goto errperm; |
| 161 | } |
| 162 | break; |
| 163 | case UNARY_DOTDOTDOT: |
| 164 | /* We only allow ... link between children of enumerator. */ |
| 165 | if (node->parent->type != NODE_ENUMERATOR) { |
| 166 | fprintf(fd, "[error]: semantic error (link \"...\" is only allowed within enumerator)\n"); |
| 167 | goto errperm; |
| 168 | } |
| 169 | /* We don't allow link on the first node of the list */ |
| 170 | if (_cds_list_first_entry(&node->parent->u.enumerator.values, |
| 171 | struct ctf_node, |
| 172 | siblings) == node) { |
| 173 | fprintf(fd, "[error]: semantic error (link \"...\" is not allowed on the first node of the unary expression list)\n"); |
| 174 | goto errperm; |
| 175 | } |
| 176 | break; |
| 177 | default: |
| 178 | fprintf(fd, "[error] %s: unknown expression link type %d\n", __func__, |
| 179 | (int) node->u.unary_expression.link); |
| 180 | return -EINVAL; |
| 181 | } |
| 182 | return 0; |
| 183 | |
| 184 | errinval: |
| 185 | fprintf(fd, "[error] %s: incoherent parent type %s for node type %s\n", __func__, |
| 186 | node_type(node->parent), node_type(node)); |
| 187 | return -EINVAL; /* Incoherent structure */ |
| 188 | |
| 189 | errperm: |
| 190 | fprintf(fd, "[error] %s: semantic error (parent type %s for node type %s)\n", __func__, |
| 191 | node_type(node->parent), node_type(node)); |
| 192 | return -EPERM; /* Structure not allowed */ |
| 193 | } |
| 194 | |
| 195 | static |
| 196 | int ctf_visitor_type_specifier_list(FILE *fd, int depth, struct ctf_node *node) |
| 197 | { |
| 198 | switch (node->parent->type) { |
| 199 | case NODE_CTF_EXPRESSION: |
| 200 | case NODE_TYPE_DECLARATOR: |
| 201 | case NODE_TYPEDEF: |
| 202 | case NODE_TYPEALIAS_TARGET: |
| 203 | case NODE_TYPEALIAS_ALIAS: |
| 204 | case NODE_ENUM: |
| 205 | case NODE_STRUCT_OR_VARIANT_DECLARATION: |
| 206 | case NODE_ROOT: |
| 207 | break; /* OK */ |
| 208 | |
| 209 | case NODE_EVENT: |
| 210 | case NODE_STREAM: |
| 211 | case NODE_TRACE: |
| 212 | case NODE_UNARY_EXPRESSION: |
| 213 | case NODE_TYPEALIAS: |
| 214 | case NODE_TYPE_SPECIFIER: |
| 215 | case NODE_TYPE_SPECIFIER_LIST: |
| 216 | case NODE_POINTER: |
| 217 | case NODE_FLOATING_POINT: |
| 218 | case NODE_INTEGER: |
| 219 | case NODE_STRING: |
| 220 | case NODE_ENUMERATOR: |
| 221 | case NODE_VARIANT: |
| 222 | case NODE_STRUCT: |
| 223 | default: |
| 224 | goto errinval; |
| 225 | } |
| 226 | return 0; |
| 227 | errinval: |
| 228 | fprintf(fd, "[error] %s: incoherent parent type %s for node type %s\n", __func__, |
| 229 | node_type(node->parent), node_type(node)); |
| 230 | return -EINVAL; /* Incoherent structure */ |
| 231 | } |
| 232 | |
| 233 | static |
| 234 | int ctf_visitor_type_specifier(FILE *fd, int depth, struct ctf_node *node) |
| 235 | { |
| 236 | switch (node->parent->type) { |
| 237 | case NODE_TYPE_SPECIFIER_LIST: |
| 238 | break; /* OK */ |
| 239 | |
| 240 | case NODE_CTF_EXPRESSION: |
| 241 | case NODE_TYPE_DECLARATOR: |
| 242 | case NODE_TYPEDEF: |
| 243 | case NODE_TYPEALIAS_TARGET: |
| 244 | case NODE_TYPEALIAS_ALIAS: |
| 245 | case NODE_ENUM: |
| 246 | case NODE_STRUCT_OR_VARIANT_DECLARATION: |
| 247 | case NODE_ROOT: |
| 248 | case NODE_EVENT: |
| 249 | case NODE_STREAM: |
| 250 | case NODE_TRACE: |
| 251 | case NODE_UNARY_EXPRESSION: |
| 252 | case NODE_TYPEALIAS: |
| 253 | case NODE_TYPE_SPECIFIER: |
| 254 | case NODE_POINTER: |
| 255 | case NODE_FLOATING_POINT: |
| 256 | case NODE_INTEGER: |
| 257 | case NODE_STRING: |
| 258 | case NODE_ENUMERATOR: |
| 259 | case NODE_VARIANT: |
| 260 | case NODE_STRUCT: |
| 261 | default: |
| 262 | goto errinval; |
| 263 | } |
| 264 | return 0; |
| 265 | errinval: |
| 266 | fprintf(fd, "[error] %s: incoherent parent type %s for node type %s\n", __func__, |
| 267 | node_type(node->parent), node_type(node)); |
| 268 | return -EINVAL; /* Incoherent structure */ |
| 269 | } |
| 270 | |
| 271 | static |
| 272 | int ctf_visitor_type_declarator(FILE *fd, int depth, struct ctf_node *node) |
| 273 | { |
| 274 | int ret = 0; |
| 275 | struct ctf_node *iter; |
| 276 | |
| 277 | depth++; |
| 278 | |
| 279 | switch (node->parent->type) { |
| 280 | case NODE_TYPE_DECLARATOR: |
| 281 | /* |
| 282 | * A nested type declarator is not allowed to contain pointers. |
| 283 | */ |
| 284 | if (!cds_list_empty(&node->u.type_declarator.pointers)) |
| 285 | goto errperm; |
| 286 | break; /* OK */ |
| 287 | case NODE_TYPEALIAS_TARGET: |
| 288 | break; /* OK */ |
| 289 | case NODE_TYPEALIAS_ALIAS: |
| 290 | /* |
| 291 | * Only accept alias name containing: |
| 292 | * - identifier |
| 293 | * - identifier * (any number of pointers) |
| 294 | * NOT accepting alias names containing [] (would otherwise |
| 295 | * cause semantic clash for later declarations of |
| 296 | * arrays/sequences of elements, where elements could be |
| 297 | * arrays/sequences themselves (if allowed in typealias). |
| 298 | * NOT accepting alias with identifier. The declarator should |
| 299 | * be either empty or contain pointer(s). |
| 300 | */ |
| 301 | if (node->u.type_declarator.type == TYPEDEC_NESTED) |
| 302 | goto errperm; |
| 303 | switch (node->u.type_declarator.type) { |
| 304 | case TYPESPEC_FLOATING_POINT: |
| 305 | case TYPESPEC_INTEGER: |
| 306 | case TYPESPEC_STRING: |
| 307 | case TYPESPEC_STRUCT: |
| 308 | case TYPESPEC_VARIANT: |
| 309 | case TYPESPEC_ENUM: |
| 310 | if (cds_list_empty(&node->u.type_declarator.pointers)) |
| 311 | goto errperm; |
| 312 | break; |
| 313 | default: |
| 314 | break; |
| 315 | } |
| 316 | if (node->u.type_declarator.type == TYPEDEC_ID && |
| 317 | node->u.type_declarator.u.id != NULL) |
| 318 | goto errperm; |
| 319 | break; /* OK */ |
| 320 | case NODE_TYPEDEF: |
| 321 | case NODE_STRUCT_OR_VARIANT_DECLARATION: |
| 322 | break; /* OK */ |
| 323 | |
| 324 | case NODE_ROOT: |
| 325 | case NODE_EVENT: |
| 326 | case NODE_STREAM: |
| 327 | case NODE_TRACE: |
| 328 | case NODE_CTF_EXPRESSION: |
| 329 | case NODE_UNARY_EXPRESSION: |
| 330 | case NODE_TYPEALIAS: |
| 331 | case NODE_TYPE_SPECIFIER: |
| 332 | case NODE_POINTER: |
| 333 | case NODE_FLOATING_POINT: |
| 334 | case NODE_INTEGER: |
| 335 | case NODE_STRING: |
| 336 | case NODE_ENUMERATOR: |
| 337 | case NODE_ENUM: |
| 338 | case NODE_VARIANT: |
| 339 | case NODE_STRUCT: |
| 340 | default: |
| 341 | goto errinval; |
| 342 | } |
| 343 | |
| 344 | if (!cds_list_empty(&node->u.type_declarator.pointers)) { |
| 345 | cds_list_for_each_entry(iter, &node->u.type_declarator.pointers, |
| 346 | siblings) { |
| 347 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 348 | if (ret) |
| 349 | return ret; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | switch (node->u.type_declarator.type) { |
| 354 | case TYPEDEC_ID: |
| 355 | break; |
| 356 | case TYPEDEC_NESTED: |
| 357 | { |
| 358 | if (node->u.type_declarator.u.nested.type_declarator) { |
| 359 | ret = _ctf_visitor_semantic_check(fd, depth + 1, |
| 360 | node->u.type_declarator.u.nested.type_declarator); |
| 361 | if (ret) |
| 362 | return ret; |
| 363 | } |
| 364 | ret = _ctf_visitor_semantic_check(fd, depth + 1, |
| 365 | node->u.type_declarator.u.nested.length); |
| 366 | if (ret) |
| 367 | return ret; |
| 368 | if (node->u.type_declarator.bitfield_len) { |
| 369 | ret = _ctf_visitor_semantic_check(fd, depth + 1, |
| 370 | node->u.type_declarator.bitfield_len); |
| 371 | if (ret) |
| 372 | return ret; |
| 373 | } |
| 374 | break; |
| 375 | } |
| 376 | case TYPEDEC_UNKNOWN: |
| 377 | default: |
| 378 | fprintf(fd, "[error] %s: unknown type declarator %d\n", __func__, |
| 379 | (int) node->u.type_declarator.type); |
| 380 | return -EINVAL; |
| 381 | } |
| 382 | depth--; |
| 383 | return 0; |
| 384 | |
| 385 | errinval: |
| 386 | fprintf(fd, "[error] %s: incoherent parent type %s for node type %s\n", __func__, |
| 387 | node_type(node->parent), node_type(node)); |
| 388 | return -EINVAL; /* Incoherent structure */ |
| 389 | |
| 390 | errperm: |
| 391 | fprintf(fd, "[error] %s: semantic error (parent type %s for node type %s)\n", __func__, |
| 392 | node_type(node->parent), node_type(node)); |
| 393 | return -EPERM; /* Structure not allowed */ |
| 394 | } |
| 395 | |
| 396 | static |
| 397 | int _ctf_visitor_semantic_check(FILE *fd, int depth, struct ctf_node *node) |
| 398 | { |
| 399 | int ret = 0; |
| 400 | struct ctf_node *iter; |
| 401 | |
| 402 | switch (node->type) { |
| 403 | case NODE_ROOT: |
| 404 | cds_list_for_each_entry(iter, &node->u.root.declaration_list, siblings) { |
| 405 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 406 | if (ret) |
| 407 | return ret; |
| 408 | } |
| 409 | cds_list_for_each_entry(iter, &node->u.root.trace, siblings) { |
| 410 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 411 | if (ret) |
| 412 | return ret; |
| 413 | } |
| 414 | cds_list_for_each_entry(iter, &node->u.root.stream, siblings) { |
| 415 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 416 | if (ret) |
| 417 | return ret; |
| 418 | } |
| 419 | cds_list_for_each_entry(iter, &node->u.root.event, siblings) { |
| 420 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 421 | if (ret) |
| 422 | return ret; |
| 423 | } |
| 424 | break; |
| 425 | |
| 426 | case NODE_EVENT: |
| 427 | switch (node->parent->type) { |
| 428 | case NODE_ROOT: |
| 429 | break; /* OK */ |
| 430 | default: |
| 431 | goto errinval; |
| 432 | } |
| 433 | |
| 434 | cds_list_for_each_entry(iter, &node->u.event.declaration_list, siblings) { |
| 435 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 436 | if (ret) |
| 437 | return ret; |
| 438 | } |
| 439 | break; |
| 440 | case NODE_STREAM: |
| 441 | switch (node->parent->type) { |
| 442 | case NODE_ROOT: |
| 443 | break; /* OK */ |
| 444 | default: |
| 445 | goto errinval; |
| 446 | } |
| 447 | |
| 448 | cds_list_for_each_entry(iter, &node->u.stream.declaration_list, siblings) { |
| 449 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 450 | if (ret) |
| 451 | return ret; |
| 452 | } |
| 453 | break; |
| 454 | case NODE_TRACE: |
| 455 | switch (node->parent->type) { |
| 456 | case NODE_ROOT: |
| 457 | break; /* OK */ |
| 458 | default: |
| 459 | goto errinval; |
| 460 | } |
| 461 | |
| 462 | cds_list_for_each_entry(iter, &node->u.trace.declaration_list, siblings) { |
| 463 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 464 | if (ret) |
| 465 | return ret; |
| 466 | } |
| 467 | break; |
| 468 | |
| 469 | case NODE_CTF_EXPRESSION: |
| 470 | switch (node->parent->type) { |
| 471 | case NODE_ROOT: |
| 472 | case NODE_EVENT: |
| 473 | case NODE_STREAM: |
| 474 | case NODE_TRACE: |
| 475 | case NODE_FLOATING_POINT: |
| 476 | case NODE_INTEGER: |
| 477 | case NODE_STRING: |
| 478 | break; /* OK */ |
| 479 | |
| 480 | case NODE_CTF_EXPRESSION: |
| 481 | case NODE_UNARY_EXPRESSION: |
| 482 | case NODE_TYPEDEF: |
| 483 | case NODE_TYPEALIAS_TARGET: |
| 484 | case NODE_TYPEALIAS_ALIAS: |
| 485 | case NODE_STRUCT_OR_VARIANT_DECLARATION: |
| 486 | case NODE_TYPEALIAS: |
| 487 | case NODE_TYPE_SPECIFIER: |
| 488 | case NODE_TYPE_SPECIFIER_LIST: |
| 489 | case NODE_POINTER: |
| 490 | case NODE_TYPE_DECLARATOR: |
| 491 | case NODE_ENUMERATOR: |
| 492 | case NODE_ENUM: |
| 493 | case NODE_VARIANT: |
| 494 | case NODE_STRUCT: |
| 495 | default: |
| 496 | goto errinval; |
| 497 | } |
| 498 | |
| 499 | depth++; |
| 500 | cds_list_for_each_entry(iter, &node->u.ctf_expression.left, siblings) { |
| 501 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 502 | if (ret) |
| 503 | return ret; |
| 504 | } |
| 505 | cds_list_for_each_entry(iter, &node->u.ctf_expression.right, siblings) { |
| 506 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 507 | if (ret) |
| 508 | return ret; |
| 509 | } |
| 510 | depth--; |
| 511 | break; |
| 512 | case NODE_UNARY_EXPRESSION: |
| 513 | return ctf_visitor_unary_expression(fd, depth, node); |
| 514 | |
| 515 | case NODE_TYPEDEF: |
| 516 | switch (node->parent->type) { |
| 517 | case NODE_ROOT: |
| 518 | case NODE_EVENT: |
| 519 | case NODE_STREAM: |
| 520 | case NODE_TRACE: |
| 521 | case NODE_VARIANT: |
| 522 | case NODE_STRUCT: |
| 523 | break; /* OK */ |
| 524 | |
| 525 | case NODE_CTF_EXPRESSION: |
| 526 | case NODE_UNARY_EXPRESSION: |
| 527 | case NODE_TYPEDEF: |
| 528 | case NODE_TYPEALIAS_TARGET: |
| 529 | case NODE_TYPEALIAS_ALIAS: |
| 530 | case NODE_TYPEALIAS: |
| 531 | case NODE_STRUCT_OR_VARIANT_DECLARATION: |
| 532 | case NODE_TYPE_SPECIFIER: |
| 533 | case NODE_TYPE_SPECIFIER_LIST: |
| 534 | case NODE_POINTER: |
| 535 | case NODE_TYPE_DECLARATOR: |
| 536 | case NODE_FLOATING_POINT: |
| 537 | case NODE_INTEGER: |
| 538 | case NODE_STRING: |
| 539 | case NODE_ENUMERATOR: |
| 540 | case NODE_ENUM: |
| 541 | default: |
| 542 | goto errinval; |
| 543 | } |
| 544 | |
| 545 | depth++; |
| 546 | ret = _ctf_visitor_semantic_check(fd, depth + 1, |
| 547 | node->u._typedef.type_specifier_list); |
| 548 | if (ret) |
| 549 | return ret; |
| 550 | cds_list_for_each_entry(iter, &node->u._typedef.type_declarators, siblings) { |
| 551 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 552 | if (ret) |
| 553 | return ret; |
| 554 | } |
| 555 | depth--; |
| 556 | break; |
| 557 | case NODE_TYPEALIAS_TARGET: |
| 558 | { |
| 559 | int nr_declarators; |
| 560 | |
| 561 | switch (node->parent->type) { |
| 562 | case NODE_TYPEALIAS: |
| 563 | break; /* OK */ |
| 564 | default: |
| 565 | goto errinval; |
| 566 | } |
| 567 | |
| 568 | depth++; |
| 569 | ret = _ctf_visitor_semantic_check(fd, depth + 1, |
| 570 | node->u.typealias_target.type_specifier_list); |
| 571 | if (ret) |
| 572 | return ret; |
| 573 | nr_declarators = 0; |
| 574 | cds_list_for_each_entry(iter, &node->u.typealias_target.type_declarators, siblings) { |
| 575 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 576 | if (ret) |
| 577 | return ret; |
| 578 | nr_declarators++; |
| 579 | } |
| 580 | if (nr_declarators > 1) { |
| 581 | fprintf(fd, "[error] %s: Too many declarators in typealias alias (%d, max is 1)\n", __func__, nr_declarators); |
| 582 | |
| 583 | return -EINVAL; |
| 584 | } |
| 585 | depth--; |
| 586 | break; |
| 587 | } |
| 588 | case NODE_TYPEALIAS_ALIAS: |
| 589 | { |
| 590 | int nr_declarators; |
| 591 | |
| 592 | switch (node->parent->type) { |
| 593 | case NODE_TYPEALIAS: |
| 594 | break; /* OK */ |
| 595 | default: |
| 596 | goto errinval; |
| 597 | } |
| 598 | |
| 599 | depth++; |
| 600 | ret = _ctf_visitor_semantic_check(fd, depth + 1, |
| 601 | node->u.typealias_alias.type_specifier_list); |
| 602 | if (ret) |
| 603 | return ret; |
| 604 | nr_declarators = 0; |
| 605 | cds_list_for_each_entry(iter, &node->u.typealias_alias.type_declarators, siblings) { |
| 606 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 607 | if (ret) |
| 608 | return ret; |
| 609 | nr_declarators++; |
| 610 | } |
| 611 | if (nr_declarators > 1) { |
| 612 | fprintf(fd, "[error] %s: Too many declarators in typealias alias (%d, max is 1)\n", __func__, nr_declarators); |
| 613 | |
| 614 | return -EINVAL; |
| 615 | } |
| 616 | depth--; |
| 617 | break; |
| 618 | } |
| 619 | case NODE_TYPEALIAS: |
| 620 | switch (node->parent->type) { |
| 621 | case NODE_ROOT: |
| 622 | case NODE_EVENT: |
| 623 | case NODE_STREAM: |
| 624 | case NODE_TRACE: |
| 625 | case NODE_VARIANT: |
| 626 | case NODE_STRUCT: |
| 627 | break; /* OK */ |
| 628 | |
| 629 | case NODE_CTF_EXPRESSION: |
| 630 | case NODE_UNARY_EXPRESSION: |
| 631 | case NODE_TYPEDEF: |
| 632 | case NODE_TYPEALIAS_TARGET: |
| 633 | case NODE_TYPEALIAS_ALIAS: |
| 634 | case NODE_TYPEALIAS: |
| 635 | case NODE_STRUCT_OR_VARIANT_DECLARATION: |
| 636 | case NODE_TYPE_SPECIFIER: |
| 637 | case NODE_TYPE_SPECIFIER_LIST: |
| 638 | case NODE_POINTER: |
| 639 | case NODE_TYPE_DECLARATOR: |
| 640 | case NODE_FLOATING_POINT: |
| 641 | case NODE_INTEGER: |
| 642 | case NODE_STRING: |
| 643 | case NODE_ENUMERATOR: |
| 644 | case NODE_ENUM: |
| 645 | default: |
| 646 | goto errinval; |
| 647 | } |
| 648 | |
| 649 | ret = _ctf_visitor_semantic_check(fd, depth + 1, node->u.typealias.target); |
| 650 | if (ret) |
| 651 | return ret; |
| 652 | ret = _ctf_visitor_semantic_check(fd, depth + 1, node->u.typealias.alias); |
| 653 | if (ret) |
| 654 | return ret; |
| 655 | break; |
| 656 | |
| 657 | case NODE_TYPE_SPECIFIER_LIST: |
| 658 | ret = ctf_visitor_type_specifier_list(fd, depth, node); |
| 659 | if (ret) |
| 660 | return ret; |
| 661 | break; |
| 662 | case NODE_TYPE_SPECIFIER: |
| 663 | ret = ctf_visitor_type_specifier(fd, depth, node); |
| 664 | if (ret) |
| 665 | return ret; |
| 666 | break; |
| 667 | case NODE_POINTER: |
| 668 | switch (node->parent->type) { |
| 669 | case NODE_TYPE_DECLARATOR: |
| 670 | break; /* OK */ |
| 671 | default: |
| 672 | goto errinval; |
| 673 | } |
| 674 | break; |
| 675 | case NODE_TYPE_DECLARATOR: |
| 676 | ret = ctf_visitor_type_declarator(fd, depth, node); |
| 677 | if (ret) |
| 678 | return ret; |
| 679 | break; |
| 680 | |
| 681 | case NODE_FLOATING_POINT: |
| 682 | switch (node->parent->type) { |
| 683 | case NODE_TYPE_SPECIFIER: |
| 684 | break; /* OK */ |
| 685 | default: |
| 686 | goto errinval; |
| 687 | |
| 688 | case NODE_UNARY_EXPRESSION: |
| 689 | goto errperm; |
| 690 | } |
| 691 | cds_list_for_each_entry(iter, &node->u.floating_point.expressions, siblings) { |
| 692 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 693 | if (ret) |
| 694 | return ret; |
| 695 | } |
| 696 | break; |
| 697 | case NODE_INTEGER: |
| 698 | switch (node->parent->type) { |
| 699 | case NODE_TYPE_SPECIFIER: |
| 700 | break; /* OK */ |
| 701 | default: |
| 702 | goto errinval; |
| 703 | |
| 704 | } |
| 705 | |
| 706 | cds_list_for_each_entry(iter, &node->u.integer.expressions, siblings) { |
| 707 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 708 | if (ret) |
| 709 | return ret; |
| 710 | } |
| 711 | break; |
| 712 | case NODE_STRING: |
| 713 | switch (node->parent->type) { |
| 714 | case NODE_TYPE_SPECIFIER: |
| 715 | break; /* OK */ |
| 716 | default: |
| 717 | goto errinval; |
| 718 | |
| 719 | case NODE_UNARY_EXPRESSION: |
| 720 | goto errperm; |
| 721 | } |
| 722 | |
| 723 | cds_list_for_each_entry(iter, &node->u.string.expressions, siblings) { |
| 724 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 725 | if (ret) |
| 726 | return ret; |
| 727 | } |
| 728 | break; |
| 729 | case NODE_ENUMERATOR: |
| 730 | switch (node->parent->type) { |
| 731 | case NODE_ENUM: |
| 732 | break; |
| 733 | default: |
| 734 | goto errinval; |
| 735 | } |
| 736 | /* |
| 737 | * Enumerators are only allows to contain: |
| 738 | * numeric unary expression |
| 739 | * or num. unary exp. ... num. unary exp |
| 740 | */ |
| 741 | { |
| 742 | int count = 0; |
| 743 | |
| 744 | cds_list_for_each_entry(iter, &node->u.enumerator.values, |
| 745 | siblings) { |
| 746 | switch (count++) { |
| 747 | case 0: if (iter->type != NODE_UNARY_EXPRESSION |
| 748 | || (iter->u.unary_expression.type != UNARY_SIGNED_CONSTANT |
| 749 | && iter->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT) |
| 750 | || iter->u.unary_expression.link != UNARY_LINK_UNKNOWN) { |
| 751 | fprintf(fd, "[error]: semantic error (first unary expression of enumerator is unexpected)\n"); |
| 752 | goto errperm; |
| 753 | } |
| 754 | break; |
| 755 | case 1: if (iter->type != NODE_UNARY_EXPRESSION |
| 756 | || (iter->u.unary_expression.type != UNARY_SIGNED_CONSTANT |
| 757 | && iter->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT) |
| 758 | || iter->u.unary_expression.link != UNARY_DOTDOTDOT) { |
| 759 | fprintf(fd, "[error]: semantic error (second unary expression of enumerator is unexpected)\n"); |
| 760 | goto errperm; |
| 761 | } |
| 762 | break; |
| 763 | default: |
| 764 | goto errperm; |
| 765 | } |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | cds_list_for_each_entry(iter, &node->u.enumerator.values, siblings) { |
| 770 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 771 | if (ret) |
| 772 | return ret; |
| 773 | } |
| 774 | break; |
| 775 | case NODE_ENUM: |
| 776 | switch (node->parent->type) { |
| 777 | case NODE_TYPE_SPECIFIER: |
| 778 | break; /* OK */ |
| 779 | default: |
| 780 | goto errinval; |
| 781 | |
| 782 | case NODE_UNARY_EXPRESSION: |
| 783 | goto errperm; |
| 784 | } |
| 785 | |
| 786 | depth++; |
| 787 | ret = _ctf_visitor_semantic_check(fd, depth + 1, node->u._enum.container_type); |
| 788 | if (ret) |
| 789 | return ret; |
| 790 | |
| 791 | cds_list_for_each_entry(iter, &node->u._enum.enumerator_list, siblings) { |
| 792 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 793 | if (ret) |
| 794 | return ret; |
| 795 | } |
| 796 | depth--; |
| 797 | break; |
| 798 | case NODE_STRUCT_OR_VARIANT_DECLARATION: |
| 799 | switch (node->parent->type) { |
| 800 | case NODE_STRUCT: |
| 801 | case NODE_VARIANT: |
| 802 | break; |
| 803 | default: |
| 804 | goto errinval; |
| 805 | } |
| 806 | ret = _ctf_visitor_semantic_check(fd, depth + 1, |
| 807 | node->u.struct_or_variant_declaration.type_specifier_list); |
| 808 | if (ret) |
| 809 | return ret; |
| 810 | cds_list_for_each_entry(iter, &node->u.struct_or_variant_declaration.type_declarators, siblings) { |
| 811 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 812 | if (ret) |
| 813 | return ret; |
| 814 | } |
| 815 | break; |
| 816 | case NODE_VARIANT: |
| 817 | switch (node->parent->type) { |
| 818 | case NODE_TYPE_SPECIFIER: |
| 819 | break; /* OK */ |
| 820 | default: |
| 821 | goto errinval; |
| 822 | |
| 823 | case NODE_UNARY_EXPRESSION: |
| 824 | goto errperm; |
| 825 | } |
| 826 | cds_list_for_each_entry(iter, &node->u.variant.declaration_list, siblings) { |
| 827 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 828 | if (ret) |
| 829 | return ret; |
| 830 | } |
| 831 | break; |
| 832 | |
| 833 | case NODE_STRUCT: |
| 834 | switch (node->parent->type) { |
| 835 | case NODE_TYPE_SPECIFIER: |
| 836 | break; /* OK */ |
| 837 | default: |
| 838 | goto errinval; |
| 839 | |
| 840 | case NODE_UNARY_EXPRESSION: |
| 841 | goto errperm; |
| 842 | } |
| 843 | cds_list_for_each_entry(iter, &node->u._struct.declaration_list, siblings) { |
| 844 | ret = _ctf_visitor_semantic_check(fd, depth + 1, iter); |
| 845 | if (ret) |
| 846 | return ret; |
| 847 | } |
| 848 | break; |
| 849 | |
| 850 | case NODE_UNKNOWN: |
| 851 | default: |
| 852 | fprintf(fd, "[error] %s: unknown node type %d\n", __func__, |
| 853 | (int) node->type); |
| 854 | return -EINVAL; |
| 855 | } |
| 856 | return ret; |
| 857 | |
| 858 | errinval: |
| 859 | fprintf(fd, "[error] %s: incoherent parent type %s for node type %s\n", __func__, |
| 860 | node_type(node->parent), node_type(node)); |
| 861 | return -EINVAL; /* Incoherent structure */ |
| 862 | |
| 863 | errperm: |
| 864 | fprintf(fd, "[error] %s: semantic error (parent type %s for node type %s)\n", __func__, |
| 865 | node_type(node->parent), node_type(node)); |
| 866 | return -EPERM; /* Structure not allowed */ |
| 867 | } |
| 868 | |
| 869 | int ctf_visitor_semantic_check(FILE *fd, int depth, struct ctf_node *node) |
| 870 | { |
| 871 | int ret = 0; |
| 872 | |
| 873 | /* |
| 874 | * First make sure we create the parent links for all children. Let's |
| 875 | * take the safe route and recreate them at each validation, just in |
| 876 | * case the structure has changed. |
| 877 | */ |
| 878 | printf_verbose("CTF visitor: parent links creation... "); |
| 879 | ret = ctf_visitor_parent_links(fd, depth, node); |
| 880 | if (ret) |
| 881 | return ret; |
| 882 | printf_verbose("done.\n"); |
| 883 | printf_verbose("CTF visitor: semantic check... "); |
| 884 | ret = _ctf_visitor_semantic_check(fd, depth, node); |
| 885 | if (ret) |
| 886 | return ret; |
| 887 | printf_verbose("done.\n"); |
| 888 | return ret; |
| 889 | } |