| 1 | /* |
| 2 | * Copyright 2018 Philippe Proulx <pproulx@efficios.com> |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 5 | * of this software and associated documentation files (the "Software"), to deal |
| 6 | * in the Software without restriction, including without limitation the rights |
| 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 8 | * copies of the Software, and to permit persons to whom the Software is |
| 9 | * furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 20 | * SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #define BT_LOG_TAG "LIB/RESOLVE-FIELD-PATH" |
| 24 | #include "lib/logging.h" |
| 25 | |
| 26 | #include "lib/assert-pre.h" |
| 27 | #include "common/assert.h" |
| 28 | #include <babeltrace2/trace-ir/field-path-const.h> |
| 29 | #include <limits.h> |
| 30 | #include <stdint.h> |
| 31 | #include <inttypes.h> |
| 32 | #include <glib.h> |
| 33 | |
| 34 | #include "field-class.h" |
| 35 | #include "field-path.h" |
| 36 | #include "resolve-field-path.h" |
| 37 | |
| 38 | static |
| 39 | bool find_field_class_recursive(struct bt_field_class *fc, |
| 40 | struct bt_field_class *tgt_fc, struct bt_field_path *field_path) |
| 41 | { |
| 42 | bool found = false; |
| 43 | |
| 44 | if (tgt_fc == fc) { |
| 45 | found = true; |
| 46 | goto end; |
| 47 | } |
| 48 | |
| 49 | switch (fc->type) { |
| 50 | case BT_FIELD_CLASS_TYPE_STRUCTURE: |
| 51 | case BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR: |
| 52 | case BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR: |
| 53 | case BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR: |
| 54 | { |
| 55 | struct bt_field_class_named_field_class_container *container_fc = |
| 56 | (void *) fc; |
| 57 | uint64_t i; |
| 58 | |
| 59 | for (i = 0; i < container_fc->named_fcs->len; i++) { |
| 60 | struct bt_named_field_class *named_fc = |
| 61 | container_fc->named_fcs->pdata[i]; |
| 62 | struct bt_field_path_item item = { |
| 63 | .type = BT_FIELD_PATH_ITEM_TYPE_INDEX, |
| 64 | .index = i, |
| 65 | }; |
| 66 | |
| 67 | bt_field_path_append_item(field_path, &item); |
| 68 | found = find_field_class_recursive(named_fc->fc, |
| 69 | tgt_fc, field_path); |
| 70 | if (found) { |
| 71 | goto end; |
| 72 | } |
| 73 | |
| 74 | bt_field_path_remove_last_item(field_path); |
| 75 | } |
| 76 | |
| 77 | break; |
| 78 | } |
| 79 | case BT_FIELD_CLASS_TYPE_STATIC_ARRAY: |
| 80 | case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY: |
| 81 | { |
| 82 | struct bt_field_class_array *array_fc = (void *) fc; |
| 83 | struct bt_field_path_item item = { |
| 84 | .type = BT_FIELD_PATH_ITEM_TYPE_CURRENT_ARRAY_ELEMENT, |
| 85 | .index = UINT64_C(-1), |
| 86 | }; |
| 87 | |
| 88 | bt_field_path_append_item(field_path, &item); |
| 89 | found = find_field_class_recursive(array_fc->element_fc, |
| 90 | tgt_fc, field_path); |
| 91 | if (found) { |
| 92 | goto end; |
| 93 | } |
| 94 | |
| 95 | bt_field_path_remove_last_item(field_path); |
| 96 | break; |
| 97 | } |
| 98 | default: |
| 99 | break; |
| 100 | } |
| 101 | |
| 102 | end: |
| 103 | return found; |
| 104 | } |
| 105 | |
| 106 | static |
| 107 | int find_field_class(struct bt_field_class *root_fc, |
| 108 | enum bt_scope root_scope, struct bt_field_class *tgt_fc, |
| 109 | struct bt_field_path **ret_field_path) |
| 110 | { |
| 111 | int ret = 0; |
| 112 | struct bt_field_path *field_path = NULL; |
| 113 | |
| 114 | if (!root_fc) { |
| 115 | goto end; |
| 116 | } |
| 117 | |
| 118 | field_path = bt_field_path_create(); |
| 119 | if (!field_path) { |
| 120 | ret = -1; |
| 121 | goto end; |
| 122 | } |
| 123 | |
| 124 | field_path->root = root_scope; |
| 125 | if (!find_field_class_recursive(root_fc, tgt_fc, field_path)) { |
| 126 | /* Not found here */ |
| 127 | BT_OBJECT_PUT_REF_AND_RESET(field_path); |
| 128 | } |
| 129 | |
| 130 | end: |
| 131 | *ret_field_path = field_path; |
| 132 | return ret; |
| 133 | } |
| 134 | |
| 135 | static |
| 136 | struct bt_field_path *find_field_class_in_ctx(struct bt_field_class *fc, |
| 137 | struct bt_resolve_field_path_context *ctx) |
| 138 | { |
| 139 | struct bt_field_path *field_path = NULL; |
| 140 | int ret; |
| 141 | |
| 142 | ret = find_field_class(ctx->packet_context, BT_SCOPE_PACKET_CONTEXT, |
| 143 | fc, &field_path); |
| 144 | if (ret || field_path) { |
| 145 | goto end; |
| 146 | } |
| 147 | |
| 148 | ret = find_field_class(ctx->event_common_context, |
| 149 | BT_SCOPE_EVENT_COMMON_CONTEXT, fc, &field_path); |
| 150 | if (ret || field_path) { |
| 151 | goto end; |
| 152 | } |
| 153 | |
| 154 | ret = find_field_class(ctx->event_specific_context, |
| 155 | BT_SCOPE_EVENT_SPECIFIC_CONTEXT, fc, &field_path); |
| 156 | if (ret || field_path) { |
| 157 | goto end; |
| 158 | } |
| 159 | |
| 160 | ret = find_field_class(ctx->event_payload, BT_SCOPE_EVENT_PAYLOAD, |
| 161 | fc, &field_path); |
| 162 | if (ret || field_path) { |
| 163 | goto end; |
| 164 | } |
| 165 | |
| 166 | end: |
| 167 | return field_path; |
| 168 | } |
| 169 | |
| 170 | BT_ASSERT_PRE_DEV_FUNC |
| 171 | static inline |
| 172 | bool target_is_before_source(struct bt_field_path *src_field_path, |
| 173 | struct bt_field_path *tgt_field_path) |
| 174 | { |
| 175 | bool is_valid = true; |
| 176 | uint64_t src_i = 0, tgt_i = 0; |
| 177 | |
| 178 | if (tgt_field_path->root < src_field_path->root) { |
| 179 | goto end; |
| 180 | } |
| 181 | |
| 182 | if (tgt_field_path->root > src_field_path->root) { |
| 183 | is_valid = false; |
| 184 | goto end; |
| 185 | } |
| 186 | |
| 187 | BT_ASSERT(tgt_field_path->root == src_field_path->root); |
| 188 | |
| 189 | for (src_i = 0, tgt_i = 0; src_i < src_field_path->items->len && |
| 190 | tgt_i < tgt_field_path->items->len; src_i++, tgt_i++) { |
| 191 | struct bt_field_path_item *src_fp_item = |
| 192 | bt_field_path_borrow_item_by_index_inline( |
| 193 | src_field_path, src_i); |
| 194 | struct bt_field_path_item *tgt_fp_item = |
| 195 | bt_field_path_borrow_item_by_index_inline( |
| 196 | tgt_field_path, tgt_i); |
| 197 | |
| 198 | if (src_fp_item->type == BT_FIELD_PATH_ITEM_TYPE_INDEX && |
| 199 | tgt_fp_item->type == BT_FIELD_PATH_ITEM_TYPE_INDEX) { |
| 200 | if (tgt_fp_item->index > src_fp_item->index) { |
| 201 | is_valid = false; |
| 202 | goto end; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | src_i++; |
| 207 | tgt_i++; |
| 208 | } |
| 209 | |
| 210 | end: |
| 211 | return is_valid; |
| 212 | } |
| 213 | |
| 214 | BT_ASSERT_PRE_DEV_FUNC |
| 215 | static inline |
| 216 | struct bt_field_class *borrow_root_field_class( |
| 217 | struct bt_resolve_field_path_context *ctx, enum bt_scope scope) |
| 218 | { |
| 219 | switch (scope) { |
| 220 | case BT_SCOPE_PACKET_CONTEXT: |
| 221 | return ctx->packet_context; |
| 222 | case BT_SCOPE_EVENT_COMMON_CONTEXT: |
| 223 | return ctx->event_common_context; |
| 224 | case BT_SCOPE_EVENT_SPECIFIC_CONTEXT: |
| 225 | return ctx->event_specific_context; |
| 226 | case BT_SCOPE_EVENT_PAYLOAD: |
| 227 | return ctx->event_payload; |
| 228 | default: |
| 229 | abort(); |
| 230 | } |
| 231 | |
| 232 | return NULL; |
| 233 | } |
| 234 | |
| 235 | BT_ASSERT_PRE_DEV_FUNC |
| 236 | static inline |
| 237 | struct bt_field_class *borrow_child_field_class( |
| 238 | struct bt_field_class *parent_fc, |
| 239 | struct bt_field_path_item *fp_item) |
| 240 | { |
| 241 | struct bt_field_class *child_fc = NULL; |
| 242 | |
| 243 | switch (parent_fc->type) { |
| 244 | case BT_FIELD_CLASS_TYPE_STRUCTURE: |
| 245 | case BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR: |
| 246 | case BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR: |
| 247 | case BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR: |
| 248 | { |
| 249 | struct bt_field_class_named_field_class_container *container_fc = |
| 250 | (void *) parent_fc; |
| 251 | struct bt_named_field_class *named_fc; |
| 252 | |
| 253 | BT_ASSERT(fp_item->type == BT_FIELD_PATH_ITEM_TYPE_INDEX); |
| 254 | named_fc = container_fc->named_fcs->pdata[fp_item->index]; |
| 255 | child_fc = named_fc->fc; |
| 256 | break; |
| 257 | } |
| 258 | case BT_FIELD_CLASS_TYPE_STATIC_ARRAY: |
| 259 | case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY: |
| 260 | { |
| 261 | struct bt_field_class_array *array_fc = (void *) parent_fc; |
| 262 | |
| 263 | BT_ASSERT(fp_item->type == |
| 264 | BT_FIELD_PATH_ITEM_TYPE_CURRENT_ARRAY_ELEMENT); |
| 265 | child_fc = array_fc->element_fc; |
| 266 | break; |
| 267 | } |
| 268 | default: |
| 269 | break; |
| 270 | } |
| 271 | |
| 272 | return child_fc; |
| 273 | } |
| 274 | |
| 275 | BT_ASSERT_PRE_DEV_FUNC |
| 276 | static inline |
| 277 | bool target_field_path_in_different_scope_has_struct_fc_only( |
| 278 | struct bt_field_path *src_field_path, |
| 279 | struct bt_field_path *tgt_field_path, |
| 280 | struct bt_resolve_field_path_context *ctx) |
| 281 | { |
| 282 | bool is_valid = true; |
| 283 | uint64_t i = 0; |
| 284 | struct bt_field_class *fc; |
| 285 | |
| 286 | if (src_field_path->root == tgt_field_path->root) { |
| 287 | goto end; |
| 288 | } |
| 289 | |
| 290 | fc = borrow_root_field_class(ctx, tgt_field_path->root); |
| 291 | |
| 292 | for (i = 0; i < tgt_field_path->items->len; i++) { |
| 293 | struct bt_field_path_item *fp_item = |
| 294 | bt_field_path_borrow_item_by_index_inline( |
| 295 | tgt_field_path, i); |
| 296 | |
| 297 | if (fc->type == BT_FIELD_CLASS_TYPE_STATIC_ARRAY || |
| 298 | fc->type == BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY || |
| 299 | fc->type == BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR || |
| 300 | fc->type == BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR || |
| 301 | fc->type == BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR) { |
| 302 | is_valid = false; |
| 303 | goto end; |
| 304 | } |
| 305 | |
| 306 | BT_ASSERT(fp_item->type == BT_FIELD_PATH_ITEM_TYPE_INDEX); |
| 307 | fc = borrow_child_field_class(fc, fp_item); |
| 308 | } |
| 309 | |
| 310 | end: |
| 311 | return is_valid; |
| 312 | } |
| 313 | |
| 314 | BT_ASSERT_PRE_DEV_FUNC |
| 315 | static inline |
| 316 | bool lca_is_structure_field_class(struct bt_field_path *src_field_path, |
| 317 | struct bt_field_path *tgt_field_path, |
| 318 | struct bt_resolve_field_path_context *ctx) |
| 319 | { |
| 320 | bool is_valid = true; |
| 321 | struct bt_field_class *src_fc; |
| 322 | struct bt_field_class *tgt_fc; |
| 323 | struct bt_field_class *prev_fc = NULL; |
| 324 | uint64_t src_i = 0, tgt_i = 0; |
| 325 | |
| 326 | if (src_field_path->root != tgt_field_path->root) { |
| 327 | goto end; |
| 328 | } |
| 329 | |
| 330 | src_fc = borrow_root_field_class(ctx, src_field_path->root); |
| 331 | tgt_fc = borrow_root_field_class(ctx, tgt_field_path->root); |
| 332 | BT_ASSERT(src_fc); |
| 333 | BT_ASSERT(tgt_fc); |
| 334 | |
| 335 | for (src_i = 0, tgt_i = 0; src_i < src_field_path->items->len && |
| 336 | tgt_i < tgt_field_path->items->len; src_i++, tgt_i++) { |
| 337 | struct bt_field_path_item *src_fp_item = |
| 338 | bt_field_path_borrow_item_by_index_inline( |
| 339 | src_field_path, src_i); |
| 340 | struct bt_field_path_item *tgt_fp_item = |
| 341 | bt_field_path_borrow_item_by_index_inline( |
| 342 | tgt_field_path, tgt_i); |
| 343 | |
| 344 | if (src_fc != tgt_fc) { |
| 345 | if (!prev_fc) { |
| 346 | /* |
| 347 | * This is correct: the LCA is the root |
| 348 | * scope field class, which must be a |
| 349 | * structure field class. |
| 350 | */ |
| 351 | break; |
| 352 | } |
| 353 | |
| 354 | if (prev_fc->type != BT_FIELD_CLASS_TYPE_STRUCTURE) { |
| 355 | is_valid = false; |
| 356 | } |
| 357 | |
| 358 | break; |
| 359 | } |
| 360 | |
| 361 | prev_fc = src_fc; |
| 362 | src_fc = borrow_child_field_class(src_fc, src_fp_item); |
| 363 | tgt_fc = borrow_child_field_class(tgt_fc, tgt_fp_item); |
| 364 | } |
| 365 | |
| 366 | end: |
| 367 | return is_valid; |
| 368 | } |
| 369 | |
| 370 | BT_ASSERT_PRE_DEV_FUNC |
| 371 | static inline |
| 372 | bool lca_to_target_has_struct_fc_only(struct bt_field_path *src_field_path, |
| 373 | struct bt_field_path *tgt_field_path, |
| 374 | struct bt_resolve_field_path_context *ctx) |
| 375 | { |
| 376 | bool is_valid = true; |
| 377 | struct bt_field_class *src_fc; |
| 378 | struct bt_field_class *tgt_fc; |
| 379 | uint64_t src_i = 0, tgt_i = 0; |
| 380 | |
| 381 | if (src_field_path->root != tgt_field_path->root) { |
| 382 | goto end; |
| 383 | } |
| 384 | |
| 385 | src_fc = borrow_root_field_class(ctx, src_field_path->root); |
| 386 | tgt_fc = borrow_root_field_class(ctx, tgt_field_path->root); |
| 387 | BT_ASSERT(src_fc); |
| 388 | BT_ASSERT(tgt_fc); |
| 389 | BT_ASSERT(src_fc == tgt_fc); |
| 390 | |
| 391 | /* Find LCA */ |
| 392 | for (src_i = 0, tgt_i = 0; src_i < src_field_path->items->len && |
| 393 | tgt_i < tgt_field_path->items->len; src_i++, tgt_i++) { |
| 394 | struct bt_field_path_item *src_fp_item = |
| 395 | bt_field_path_borrow_item_by_index_inline( |
| 396 | src_field_path, src_i); |
| 397 | struct bt_field_path_item *tgt_fp_item = |
| 398 | bt_field_path_borrow_item_by_index_inline( |
| 399 | tgt_field_path, tgt_i); |
| 400 | |
| 401 | if (src_i != tgt_i) { |
| 402 | /* Next field class is different: LCA is `tgt_fc` */ |
| 403 | break; |
| 404 | } |
| 405 | |
| 406 | src_fc = borrow_child_field_class(src_fc, src_fp_item); |
| 407 | tgt_fc = borrow_child_field_class(tgt_fc, tgt_fp_item); |
| 408 | } |
| 409 | |
| 410 | /* Only structure field classes to the target */ |
| 411 | for (; tgt_i < tgt_field_path->items->len; tgt_i++) { |
| 412 | struct bt_field_path_item *tgt_fp_item = |
| 413 | bt_field_path_borrow_item_by_index_inline( |
| 414 | tgt_field_path, tgt_i); |
| 415 | |
| 416 | if (tgt_fc->type == BT_FIELD_CLASS_TYPE_STATIC_ARRAY || |
| 417 | tgt_fc->type == BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY || |
| 418 | tgt_fc->type == BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR || |
| 419 | tgt_fc->type == BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR || |
| 420 | tgt_fc->type == BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR) { |
| 421 | is_valid = false; |
| 422 | goto end; |
| 423 | } |
| 424 | |
| 425 | tgt_fc = borrow_child_field_class(tgt_fc, tgt_fp_item); |
| 426 | } |
| 427 | |
| 428 | end: |
| 429 | return is_valid; |
| 430 | } |
| 431 | |
| 432 | BT_ASSERT_PRE_DEV_FUNC |
| 433 | static inline |
| 434 | bool field_path_is_valid(struct bt_field_class *src_fc, |
| 435 | struct bt_field_class *tgt_fc, |
| 436 | struct bt_resolve_field_path_context *ctx) |
| 437 | { |
| 438 | bool is_valid = true; |
| 439 | struct bt_field_path *src_field_path = find_field_class_in_ctx( |
| 440 | src_fc, ctx); |
| 441 | struct bt_field_path *tgt_field_path = find_field_class_in_ctx( |
| 442 | tgt_fc, ctx); |
| 443 | |
| 444 | if (!src_field_path) { |
| 445 | BT_ASSERT_PRE_DEV_MSG("Cannot find requesting field class in " |
| 446 | "resolving context: %!+F", src_fc); |
| 447 | is_valid = false; |
| 448 | goto end; |
| 449 | } |
| 450 | |
| 451 | if (!tgt_field_path) { |
| 452 | BT_ASSERT_PRE_DEV_MSG("Cannot find target field class in " |
| 453 | "resolving context: %!+F", tgt_fc); |
| 454 | is_valid = false; |
| 455 | goto end; |
| 456 | } |
| 457 | |
| 458 | /* Target must be before source */ |
| 459 | if (!target_is_before_source(src_field_path, tgt_field_path)) { |
| 460 | BT_ASSERT_PRE_DEV_MSG("Target field class is located after " |
| 461 | "requesting field class: %![req-fc-]+F, %![tgt-fc-]+F", |
| 462 | src_fc, tgt_fc); |
| 463 | is_valid = false; |
| 464 | goto end; |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * If target is in a different scope than source, there are no |
| 469 | * array or variant field classes on the way to the target. |
| 470 | */ |
| 471 | if (!target_field_path_in_different_scope_has_struct_fc_only( |
| 472 | src_field_path, tgt_field_path, ctx)) { |
| 473 | BT_ASSERT_PRE_DEV_MSG("Target field class is located in a " |
| 474 | "different scope than requesting field class, " |
| 475 | "but within an array or a variant field class: " |
| 476 | "%![req-fc-]+F, %![tgt-fc-]+F", |
| 477 | src_fc, tgt_fc); |
| 478 | is_valid = false; |
| 479 | goto end; |
| 480 | } |
| 481 | |
| 482 | /* Same scope: LCA must be a structure field class */ |
| 483 | if (!lca_is_structure_field_class(src_field_path, tgt_field_path, ctx)) { |
| 484 | BT_ASSERT_PRE_DEV_MSG("Lowest common ancestor of target and " |
| 485 | "requesting field classes is not a structure field class: " |
| 486 | "%![req-fc-]+F, %![tgt-fc-]+F", |
| 487 | src_fc, tgt_fc); |
| 488 | is_valid = false; |
| 489 | goto end; |
| 490 | } |
| 491 | |
| 492 | /* Same scope: path from LCA to target has no array/variant FTs */ |
| 493 | if (!lca_to_target_has_struct_fc_only(src_field_path, tgt_field_path, |
| 494 | ctx)) { |
| 495 | BT_ASSERT_PRE_DEV_MSG("Path from lowest common ancestor of target " |
| 496 | "and requesting field classes to target field class " |
| 497 | "contains an array or a variant field class: " |
| 498 | "%![req-fc-]+F, %![tgt-fc-]+F", src_fc, tgt_fc); |
| 499 | is_valid = false; |
| 500 | goto end; |
| 501 | } |
| 502 | |
| 503 | end: |
| 504 | bt_object_put_ref(src_field_path); |
| 505 | bt_object_put_ref(tgt_field_path); |
| 506 | return is_valid; |
| 507 | } |
| 508 | |
| 509 | static |
| 510 | struct bt_field_path *resolve_field_path(struct bt_field_class *src_fc, |
| 511 | struct bt_field_class *tgt_fc, |
| 512 | struct bt_resolve_field_path_context *ctx) |
| 513 | { |
| 514 | BT_ASSERT_PRE_DEV(field_path_is_valid(src_fc, tgt_fc, ctx), |
| 515 | "Invalid target field class: %![req-fc-]+F, %![tgt-fc-]+F", |
| 516 | src_fc, tgt_fc); |
| 517 | return find_field_class_in_ctx(tgt_fc, ctx); |
| 518 | } |
| 519 | |
| 520 | BT_HIDDEN |
| 521 | int bt_resolve_field_paths(struct bt_field_class *fc, |
| 522 | struct bt_resolve_field_path_context *ctx) |
| 523 | { |
| 524 | int ret = 0; |
| 525 | |
| 526 | BT_ASSERT(fc); |
| 527 | |
| 528 | /* Resolving part for dynamic array and variant field classes */ |
| 529 | switch (fc->type) { |
| 530 | case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY: |
| 531 | { |
| 532 | struct bt_field_class_dynamic_array *dyn_array_fc = (void *) fc; |
| 533 | |
| 534 | if (dyn_array_fc->length_fc) { |
| 535 | BT_ASSERT(!dyn_array_fc->length_field_path); |
| 536 | dyn_array_fc->length_field_path = resolve_field_path( |
| 537 | fc, dyn_array_fc->length_fc, ctx); |
| 538 | if (!dyn_array_fc->length_field_path) { |
| 539 | ret = -1; |
| 540 | goto end; |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | break; |
| 545 | } |
| 546 | case BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR: |
| 547 | case BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR: |
| 548 | { |
| 549 | struct bt_field_class_variant_with_selector *var_fc = |
| 550 | (void *) fc; |
| 551 | |
| 552 | if (var_fc->selector_fc) { |
| 553 | BT_ASSERT(!var_fc->selector_field_path); |
| 554 | var_fc->selector_field_path = |
| 555 | resolve_field_path(fc, |
| 556 | (void *) var_fc->selector_fc, ctx); |
| 557 | if (!var_fc->selector_field_path) { |
| 558 | ret = -1; |
| 559 | goto end; |
| 560 | } |
| 561 | } |
| 562 | } |
| 563 | default: |
| 564 | break; |
| 565 | } |
| 566 | |
| 567 | /* Recursive part */ |
| 568 | switch (fc->type) { |
| 569 | case BT_FIELD_CLASS_TYPE_STRUCTURE: |
| 570 | case BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR: |
| 571 | case BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR: |
| 572 | case BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR: |
| 573 | { |
| 574 | struct bt_field_class_named_field_class_container *container_fc = |
| 575 | (void *) fc; |
| 576 | uint64_t i; |
| 577 | |
| 578 | for (i = 0; i < container_fc->named_fcs->len; i++) { |
| 579 | struct bt_named_field_class *named_fc = |
| 580 | container_fc->named_fcs->pdata[i]; |
| 581 | |
| 582 | ret = bt_resolve_field_paths(named_fc->fc, ctx); |
| 583 | if (ret) { |
| 584 | goto end; |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | break; |
| 589 | } |
| 590 | case BT_FIELD_CLASS_TYPE_STATIC_ARRAY: |
| 591 | case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY: |
| 592 | { |
| 593 | struct bt_field_class_array *array_fc = (void *) fc; |
| 594 | |
| 595 | ret = bt_resolve_field_paths(array_fc->element_fc, ctx); |
| 596 | break; |
| 597 | } |
| 598 | default: |
| 599 | break; |
| 600 | } |
| 601 | |
| 602 | end: |
| 603 | return ret; |
| 604 | } |