| 1 | /* |
| 2 | * Copyright 2016-2018 - Philippe Proulx <pproulx@efficios.com> |
| 3 | * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 | * of this software and associated documentation files (the "Software"), to deal |
| 7 | * in the Software without restriction, including without limitation the rights |
| 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 9 | * copies of the Software, and to permit persons to whom the Software is |
| 10 | * furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be included in |
| 13 | * all copies or substantial portions of the Software. |
| 14 | */ |
| 15 | |
| 16 | #define BT_COMP_LOG_SELF_COMP (ctx->self_comp) |
| 17 | #define BT_LOG_OUTPUT_LEVEL (ctx->log_level) |
| 18 | #define BT_LOG_TAG "PLUGIN/CTF/META/RESOLVE" |
| 19 | #include "logging/comp-logging.h" |
| 20 | |
| 21 | #include <babeltrace2/babeltrace.h> |
| 22 | #include "common/macros.h" |
| 23 | #include "common/assert.h" |
| 24 | #include "common/common.h" |
| 25 | #include <glib.h> |
| 26 | #include <stdint.h> |
| 27 | #include <string.h> |
| 28 | #include <inttypes.h> |
| 29 | #include <limits.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <glib.h> |
| 32 | |
| 33 | #include "ctf-meta-visitors.h" |
| 34 | #include "logging.h" |
| 35 | |
| 36 | typedef GPtrArray field_class_stack; |
| 37 | |
| 38 | /* |
| 39 | * A stack frame. |
| 40 | * |
| 41 | * `fc` contains a compound field class (structure, variant, array, |
| 42 | * or sequence) and `index` indicates the index of the field class in |
| 43 | * the upper frame (-1 for array and sequence field classes). `name` |
| 44 | * indicates the name of the field class in the upper frame (empty |
| 45 | * string for array and sequence field classes). |
| 46 | */ |
| 47 | struct field_class_stack_frame { |
| 48 | struct ctf_field_class *fc; |
| 49 | int64_t index; |
| 50 | }; |
| 51 | |
| 52 | /* |
| 53 | * The current context of the resolving engine. |
| 54 | */ |
| 55 | struct resolve_context { |
| 56 | bt_logging_level log_level; |
| 57 | bt_self_component *self_comp; |
| 58 | struct ctf_trace_class *tc; |
| 59 | struct ctf_stream_class *sc; |
| 60 | struct ctf_event_class *ec; |
| 61 | |
| 62 | struct { |
| 63 | struct ctf_field_class *packet_header; |
| 64 | struct ctf_field_class *packet_context; |
| 65 | struct ctf_field_class *event_header; |
| 66 | struct ctf_field_class *event_common_context; |
| 67 | struct ctf_field_class *event_spec_context; |
| 68 | struct ctf_field_class *event_payload; |
| 69 | } scopes; |
| 70 | |
| 71 | /* Root scope being visited */ |
| 72 | enum ctf_scope root_scope; |
| 73 | field_class_stack *field_class_stack; |
| 74 | struct ctf_field_class *cur_fc; |
| 75 | }; |
| 76 | |
| 77 | /* TSDL dynamic scope prefixes as defined in CTF Section 7.3.2 */ |
| 78 | static const char * const absolute_path_prefixes[] = { |
| 79 | [CTF_SCOPE_PACKET_HEADER] = "trace.packet.header.", |
| 80 | [CTF_SCOPE_PACKET_CONTEXT] = "stream.packet.context.", |
| 81 | [CTF_SCOPE_EVENT_HEADER] = "stream.event.header.", |
| 82 | [CTF_SCOPE_EVENT_COMMON_CONTEXT] = "stream.event.context.", |
| 83 | [CTF_SCOPE_EVENT_SPECIFIC_CONTEXT] = "event.context.", |
| 84 | [CTF_SCOPE_EVENT_PAYLOAD] = "event.fields.", |
| 85 | }; |
| 86 | |
| 87 | /* Number of path tokens used for the absolute prefixes */ |
| 88 | static const uint64_t absolute_path_prefix_ptoken_counts[] = { |
| 89 | [CTF_SCOPE_PACKET_HEADER] = 3, |
| 90 | [CTF_SCOPE_PACKET_CONTEXT] = 3, |
| 91 | [CTF_SCOPE_EVENT_HEADER] = 3, |
| 92 | [CTF_SCOPE_EVENT_COMMON_CONTEXT] = 3, |
| 93 | [CTF_SCOPE_EVENT_SPECIFIC_CONTEXT] = 2, |
| 94 | [CTF_SCOPE_EVENT_PAYLOAD] = 2, |
| 95 | }; |
| 96 | |
| 97 | static |
| 98 | void destroy_field_class_stack_frame(struct field_class_stack_frame *frame) |
| 99 | { |
| 100 | if (!frame) { |
| 101 | return; |
| 102 | } |
| 103 | |
| 104 | g_free(frame); |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * Creates a class stack. |
| 109 | */ |
| 110 | static |
| 111 | field_class_stack *field_class_stack_create(void) |
| 112 | { |
| 113 | return g_ptr_array_new_with_free_func( |
| 114 | (GDestroyNotify) destroy_field_class_stack_frame); |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * Destroys a class stack. |
| 119 | */ |
| 120 | static |
| 121 | void field_class_stack_destroy(field_class_stack *stack) |
| 122 | { |
| 123 | if (stack) { |
| 124 | g_ptr_array_free(stack, TRUE); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Pushes a field class onto a class stack. |
| 130 | */ |
| 131 | static |
| 132 | int field_class_stack_push(field_class_stack *stack, struct ctf_field_class *fc, |
| 133 | struct resolve_context *ctx) |
| 134 | { |
| 135 | int ret = 0; |
| 136 | struct field_class_stack_frame *frame = NULL; |
| 137 | |
| 138 | if (!stack || !fc) { |
| 139 | BT_COMP_LOGE("Invalid parameter: stack or field class is NULL."); |
| 140 | ret = -1; |
| 141 | goto end; |
| 142 | } |
| 143 | |
| 144 | frame = g_new0(struct field_class_stack_frame, 1); |
| 145 | if (!frame) { |
| 146 | BT_COMP_LOGE_STR("Failed to allocate one field class stack frame."); |
| 147 | ret = -1; |
| 148 | goto end; |
| 149 | } |
| 150 | |
| 151 | BT_COMP_LOGD("Pushing field class on context's stack: " |
| 152 | "fc-addr=%p, stack-size-before=%u", fc, stack->len); |
| 153 | frame->fc = fc; |
| 154 | g_ptr_array_add(stack, frame); |
| 155 | |
| 156 | end: |
| 157 | return ret; |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * Checks whether or not `stack` is empty. |
| 162 | */ |
| 163 | static |
| 164 | bool field_class_stack_empty(field_class_stack *stack) |
| 165 | { |
| 166 | return stack->len == 0; |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Returns the number of frames in `stack`. |
| 171 | */ |
| 172 | static |
| 173 | size_t field_class_stack_size(field_class_stack *stack) |
| 174 | { |
| 175 | return stack->len; |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * Returns the top frame of `stack`. |
| 180 | */ |
| 181 | static |
| 182 | struct field_class_stack_frame *field_class_stack_peek(field_class_stack *stack) |
| 183 | { |
| 184 | BT_ASSERT(stack); |
| 185 | BT_ASSERT(!field_class_stack_empty(stack)); |
| 186 | |
| 187 | return g_ptr_array_index(stack, stack->len - 1); |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Returns the frame at index `index` in `stack`. |
| 192 | */ |
| 193 | static |
| 194 | struct field_class_stack_frame *field_class_stack_at(field_class_stack *stack, |
| 195 | size_t index) |
| 196 | { |
| 197 | BT_ASSERT(stack); |
| 198 | BT_ASSERT(index < stack->len); |
| 199 | |
| 200 | return g_ptr_array_index(stack, index); |
| 201 | } |
| 202 | |
| 203 | /* |
| 204 | * Removes the top frame of `stack`. |
| 205 | */ |
| 206 | static |
| 207 | void field_class_stack_pop(field_class_stack *stack, |
| 208 | struct resolve_context *ctx) |
| 209 | { |
| 210 | if (!field_class_stack_empty(stack)) { |
| 211 | /* |
| 212 | * This will call the frame's destructor and free it, as |
| 213 | * well as put its contained field class. |
| 214 | */ |
| 215 | BT_COMP_LOGD("Popping context's stack: stack-size-before=%u", |
| 216 | stack->len); |
| 217 | g_ptr_array_set_size(stack, stack->len - 1); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * Returns the scope field class of `scope` in the context `ctx`. |
| 223 | */ |
| 224 | static |
| 225 | struct ctf_field_class *borrow_class_from_ctx(struct resolve_context *ctx, |
| 226 | enum ctf_scope scope) |
| 227 | { |
| 228 | switch (scope) { |
| 229 | case CTF_SCOPE_PACKET_HEADER: |
| 230 | return ctx->scopes.packet_header; |
| 231 | case CTF_SCOPE_PACKET_CONTEXT: |
| 232 | return ctx->scopes.packet_context; |
| 233 | case CTF_SCOPE_EVENT_HEADER: |
| 234 | return ctx->scopes.event_header; |
| 235 | case CTF_SCOPE_EVENT_COMMON_CONTEXT: |
| 236 | return ctx->scopes.event_common_context; |
| 237 | case CTF_SCOPE_EVENT_SPECIFIC_CONTEXT: |
| 238 | return ctx->scopes.event_spec_context; |
| 239 | case CTF_SCOPE_EVENT_PAYLOAD: |
| 240 | return ctx->scopes.event_payload; |
| 241 | default: |
| 242 | abort(); |
| 243 | } |
| 244 | |
| 245 | return NULL; |
| 246 | } |
| 247 | |
| 248 | /* |
| 249 | * Returns the CTF scope from a path string. May return -1 if the path |
| 250 | * is found to be relative. |
| 251 | */ |
| 252 | static |
| 253 | enum ctf_scope get_root_scope_from_absolute_pathstr(const char *pathstr, |
| 254 | struct resolve_context *ctx) |
| 255 | { |
| 256 | enum ctf_scope scope; |
| 257 | enum ctf_scope ret = CTF_SCOPE_PACKET_UNKNOWN; |
| 258 | const size_t prefixes_count = sizeof(absolute_path_prefixes) / |
| 259 | sizeof(*absolute_path_prefixes); |
| 260 | |
| 261 | for (scope = CTF_SCOPE_PACKET_HEADER; scope < CTF_SCOPE_PACKET_HEADER + |
| 262 | prefixes_count; scope++) { |
| 263 | /* |
| 264 | * Check if path string starts with a known absolute |
| 265 | * path prefix. |
| 266 | * |
| 267 | * Refer to CTF 7.3.2 STATIC AND DYNAMIC SCOPES. |
| 268 | */ |
| 269 | if (strncmp(pathstr, absolute_path_prefixes[scope], |
| 270 | strlen(absolute_path_prefixes[scope]))) { |
| 271 | /* Prefix does not match: try the next one */ |
| 272 | BT_COMP_LOGD("Prefix does not match: trying the next one: " |
| 273 | "path=\"%s\", path-prefix=\"%s\", scope=%s", |
| 274 | pathstr, absolute_path_prefixes[scope], |
| 275 | ctf_scope_string(scope)); |
| 276 | continue; |
| 277 | } |
| 278 | |
| 279 | /* Found it! */ |
| 280 | ret = scope; |
| 281 | BT_COMP_LOGD("Found root scope from absolute path: " |
| 282 | "path=\"%s\", scope=%s", pathstr, |
| 283 | ctf_scope_string(scope)); |
| 284 | goto end; |
| 285 | } |
| 286 | |
| 287 | end: |
| 288 | return ret; |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * Destroys a path token. |
| 293 | */ |
| 294 | static |
| 295 | void ptokens_destroy_func(gpointer ptoken, gpointer data) |
| 296 | { |
| 297 | g_string_free(ptoken, TRUE); |
| 298 | } |
| 299 | |
| 300 | /* |
| 301 | * Destroys a path token list. |
| 302 | */ |
| 303 | static |
| 304 | void ptokens_destroy(GList *ptokens) |
| 305 | { |
| 306 | if (!ptokens) { |
| 307 | return; |
| 308 | } |
| 309 | |
| 310 | g_list_foreach(ptokens, ptokens_destroy_func, NULL); |
| 311 | g_list_free(ptokens); |
| 312 | } |
| 313 | |
| 314 | /* |
| 315 | * Returns the string contained in a path token. |
| 316 | */ |
| 317 | static |
| 318 | const char *ptoken_get_string(GList *ptoken) |
| 319 | { |
| 320 | GString *tokenstr = (GString *) ptoken->data; |
| 321 | |
| 322 | return tokenstr->str; |
| 323 | } |
| 324 | |
| 325 | /* |
| 326 | * Converts a path string to a path token list, that is, splits the |
| 327 | * individual words of a path string into a list of individual |
| 328 | * strings. |
| 329 | */ |
| 330 | static |
| 331 | GList *pathstr_to_ptokens(const char *pathstr, struct resolve_context *ctx) |
| 332 | { |
| 333 | const char *at = pathstr; |
| 334 | const char *last = at; |
| 335 | GList *ptokens = NULL; |
| 336 | |
| 337 | for (;;) { |
| 338 | if (*at == '.' || *at == '\0') { |
| 339 | GString *tokenstr; |
| 340 | |
| 341 | if (at == last) { |
| 342 | /* Error: empty token */ |
| 343 | BT_COMP_LOGE("Empty path token: path=\"%s\", pos=%u", |
| 344 | pathstr, (unsigned int) (at - pathstr)); |
| 345 | goto error; |
| 346 | } |
| 347 | |
| 348 | tokenstr = g_string_new(NULL); |
| 349 | g_string_append_len(tokenstr, last, at - last); |
| 350 | ptokens = g_list_append(ptokens, tokenstr); |
| 351 | last = at + 1; |
| 352 | } |
| 353 | |
| 354 | if (*at == '\0') { |
| 355 | break; |
| 356 | } |
| 357 | |
| 358 | at++; |
| 359 | } |
| 360 | |
| 361 | return ptokens; |
| 362 | |
| 363 | error: |
| 364 | ptokens_destroy(ptokens); |
| 365 | return NULL; |
| 366 | } |
| 367 | |
| 368 | /* |
| 369 | * Converts a path token list to a field path object. The path token |
| 370 | * list is relative from `fc`. The index of the source looking for its |
| 371 | * target within `fc` is indicated by `src_index`. This can be |
| 372 | * `INT64_MAX` if the source is contained in `fc`. |
| 373 | * |
| 374 | * `field_path` is an output parameter owned by the caller that must be |
| 375 | * filled here. |
| 376 | */ |
| 377 | static |
| 378 | int ptokens_to_field_path(GList *ptokens, struct ctf_field_path *field_path, |
| 379 | struct ctf_field_class *fc, int64_t src_index, |
| 380 | struct resolve_context *ctx) |
| 381 | { |
| 382 | int ret = 0; |
| 383 | GList *cur_ptoken = ptokens; |
| 384 | bool first_level_done = false; |
| 385 | |
| 386 | /* Locate target */ |
| 387 | while (cur_ptoken) { |
| 388 | int64_t child_index; |
| 389 | struct ctf_field_class *child_fc; |
| 390 | const char *ft_name = ptoken_get_string(cur_ptoken); |
| 391 | |
| 392 | BT_COMP_LOGD("Current path token: token=\"%s\"", ft_name); |
| 393 | |
| 394 | /* Find to which index corresponds the current path token */ |
| 395 | if (fc->type == CTF_FIELD_CLASS_TYPE_ARRAY || |
| 396 | fc->type == CTF_FIELD_CLASS_TYPE_SEQUENCE) { |
| 397 | child_index = -1; |
| 398 | } else { |
| 399 | child_index = |
| 400 | ctf_field_class_compound_get_field_class_index_from_orig_name( |
| 401 | fc, ft_name); |
| 402 | if (child_index < 0) { |
| 403 | /* |
| 404 | * Error: field name does not exist or |
| 405 | * wrong current class. |
| 406 | */ |
| 407 | BT_COMP_LOGD("Cannot get index of field class: " |
| 408 | "field-name=\"%s\", " |
| 409 | "src-index=%" PRId64 ", " |
| 410 | "child-index=%" PRId64 ", " |
| 411 | "first-level-done=%d", |
| 412 | ft_name, src_index, child_index, |
| 413 | first_level_done); |
| 414 | ret = -1; |
| 415 | goto end; |
| 416 | } else if (child_index > src_index && |
| 417 | !first_level_done) { |
| 418 | BT_COMP_LOGD("Child field class is located after source field class: " |
| 419 | "field-name=\"%s\", " |
| 420 | "src-index=%" PRId64 ", " |
| 421 | "child-index=%" PRId64 ", " |
| 422 | "first-level-done=%d", |
| 423 | ft_name, src_index, child_index, |
| 424 | first_level_done); |
| 425 | ret = -1; |
| 426 | goto end; |
| 427 | } |
| 428 | |
| 429 | /* Next path token */ |
| 430 | cur_ptoken = g_list_next(cur_ptoken); |
| 431 | first_level_done = true; |
| 432 | } |
| 433 | |
| 434 | /* Create new field path entry */ |
| 435 | ctf_field_path_append_index(field_path, child_index); |
| 436 | |
| 437 | /* Get child field class */ |
| 438 | child_fc = ctf_field_class_compound_borrow_field_class_by_index( |
| 439 | fc, child_index); |
| 440 | BT_ASSERT(child_fc); |
| 441 | |
| 442 | /* Move child class to current class */ |
| 443 | fc = child_fc; |
| 444 | } |
| 445 | |
| 446 | end: |
| 447 | return ret; |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | * Converts a known absolute path token list to a field path object |
| 452 | * within the resolving context `ctx`. |
| 453 | * |
| 454 | * `field_path` is an output parameter owned by the caller that must be |
| 455 | * filled here. |
| 456 | */ |
| 457 | static |
| 458 | int absolute_ptokens_to_field_path(GList *ptokens, |
| 459 | struct ctf_field_path *field_path, |
| 460 | struct resolve_context *ctx) |
| 461 | { |
| 462 | int ret = 0; |
| 463 | GList *cur_ptoken; |
| 464 | struct ctf_field_class *fc; |
| 465 | |
| 466 | /* |
| 467 | * Make sure we're not referring to a scope within a translated |
| 468 | * object. |
| 469 | */ |
| 470 | switch (field_path->root) { |
| 471 | case CTF_SCOPE_PACKET_HEADER: |
| 472 | if (ctx->tc->is_translated) { |
| 473 | BT_COMP_LOGE("Trace class is already translated: " |
| 474 | "root-scope=%s", |
| 475 | ctf_scope_string(field_path->root)); |
| 476 | ret = -1; |
| 477 | goto end; |
| 478 | } |
| 479 | |
| 480 | break; |
| 481 | case CTF_SCOPE_PACKET_CONTEXT: |
| 482 | case CTF_SCOPE_EVENT_HEADER: |
| 483 | case CTF_SCOPE_EVENT_COMMON_CONTEXT: |
| 484 | if (!ctx->sc) { |
| 485 | BT_COMP_LOGE("No current stream class: " |
| 486 | "root-scope=%s", |
| 487 | ctf_scope_string(field_path->root)); |
| 488 | ret = -1; |
| 489 | goto end; |
| 490 | } |
| 491 | |
| 492 | if (ctx->sc->is_translated) { |
| 493 | BT_COMP_LOGE("Stream class is already translated: " |
| 494 | "root-scope=%s", |
| 495 | ctf_scope_string(field_path->root)); |
| 496 | ret = -1; |
| 497 | goto end; |
| 498 | } |
| 499 | |
| 500 | break; |
| 501 | case CTF_SCOPE_EVENT_SPECIFIC_CONTEXT: |
| 502 | case CTF_SCOPE_EVENT_PAYLOAD: |
| 503 | if (!ctx->ec) { |
| 504 | BT_COMP_LOGE("No current event class: " |
| 505 | "root-scope=%s", |
| 506 | ctf_scope_string(field_path->root)); |
| 507 | ret = -1; |
| 508 | goto end; |
| 509 | } |
| 510 | |
| 511 | if (ctx->ec->is_translated) { |
| 512 | BT_COMP_LOGE("Event class is already translated: " |
| 513 | "root-scope=%s", |
| 514 | ctf_scope_string(field_path->root)); |
| 515 | ret = -1; |
| 516 | goto end; |
| 517 | } |
| 518 | |
| 519 | break; |
| 520 | |
| 521 | default: |
| 522 | abort(); |
| 523 | } |
| 524 | |
| 525 | /* Skip absolute path tokens */ |
| 526 | cur_ptoken = g_list_nth(ptokens, |
| 527 | absolute_path_prefix_ptoken_counts[field_path->root]); |
| 528 | |
| 529 | /* Start with root class */ |
| 530 | fc = borrow_class_from_ctx(ctx, field_path->root); |
| 531 | if (!fc) { |
| 532 | /* Error: root class is not available */ |
| 533 | BT_COMP_LOGE("Root field class is not available: " |
| 534 | "root-scope=%s", |
| 535 | ctf_scope_string(field_path->root)); |
| 536 | ret = -1; |
| 537 | goto end; |
| 538 | } |
| 539 | |
| 540 | /* Locate target */ |
| 541 | ret = ptokens_to_field_path(cur_ptoken, field_path, fc, INT64_MAX, ctx); |
| 542 | |
| 543 | end: |
| 544 | return ret; |
| 545 | } |
| 546 | |
| 547 | /* |
| 548 | * Converts a known relative path token list to a field path object |
| 549 | * within the resolving context `ctx`. |
| 550 | * |
| 551 | * `field_path` is an output parameter owned by the caller that must be |
| 552 | * filled here. |
| 553 | */ |
| 554 | static |
| 555 | int relative_ptokens_to_field_path(GList *ptokens, |
| 556 | struct ctf_field_path *field_path, struct resolve_context *ctx) |
| 557 | { |
| 558 | int ret = 0; |
| 559 | int64_t parent_pos_in_stack; |
| 560 | struct ctf_field_path tail_field_path; |
| 561 | |
| 562 | ctf_field_path_init(&tail_field_path); |
| 563 | parent_pos_in_stack = field_class_stack_size(ctx->field_class_stack) - 1; |
| 564 | |
| 565 | while (parent_pos_in_stack >= 0) { |
| 566 | struct ctf_field_class *parent_class = |
| 567 | field_class_stack_at(ctx->field_class_stack, |
| 568 | parent_pos_in_stack)->fc; |
| 569 | int64_t cur_index = field_class_stack_at(ctx->field_class_stack, |
| 570 | parent_pos_in_stack)->index; |
| 571 | |
| 572 | BT_COMP_LOGD("Locating target field class from current parent field class: " |
| 573 | "parent-pos=%" PRId64 ", parent-fc-addr=%p, " |
| 574 | "cur-index=%" PRId64, |
| 575 | parent_pos_in_stack, parent_class, cur_index); |
| 576 | |
| 577 | /* Locate target from current parent class */ |
| 578 | ret = ptokens_to_field_path(ptokens, &tail_field_path, |
| 579 | parent_class, cur_index, ctx); |
| 580 | if (ret) { |
| 581 | /* Not found... yet */ |
| 582 | BT_COMP_LOGD_STR("Not found at this point."); |
| 583 | ctf_field_path_clear(&tail_field_path); |
| 584 | } else { |
| 585 | /* Found: stitch tail field path to head field path */ |
| 586 | uint64_t i = 0; |
| 587 | size_t tail_field_path_len = |
| 588 | tail_field_path.path->len; |
| 589 | |
| 590 | while (BT_TRUE) { |
| 591 | struct ctf_field_class *cur_class = |
| 592 | field_class_stack_at( |
| 593 | ctx->field_class_stack, i)->fc; |
| 594 | int64_t index = field_class_stack_at( |
| 595 | ctx->field_class_stack, i)->index; |
| 596 | |
| 597 | if (cur_class == parent_class) { |
| 598 | break; |
| 599 | } |
| 600 | |
| 601 | ctf_field_path_append_index(field_path, |
| 602 | index); |
| 603 | i++; |
| 604 | } |
| 605 | |
| 606 | for (i = 0; i < tail_field_path_len; i++) { |
| 607 | int64_t index = |
| 608 | ctf_field_path_borrow_index_by_index( |
| 609 | &tail_field_path, i); |
| 610 | |
| 611 | ctf_field_path_append_index(field_path, |
| 612 | (int64_t) index); |
| 613 | } |
| 614 | break; |
| 615 | } |
| 616 | |
| 617 | parent_pos_in_stack--; |
| 618 | } |
| 619 | |
| 620 | if (parent_pos_in_stack < 0) { |
| 621 | /* Not found */ |
| 622 | ret = -1; |
| 623 | } |
| 624 | |
| 625 | ctf_field_path_fini(&tail_field_path); |
| 626 | return ret; |
| 627 | } |
| 628 | |
| 629 | /* |
| 630 | * Converts a path string to a field path object within the resolving |
| 631 | * context `ctx`. |
| 632 | */ |
| 633 | static |
| 634 | int pathstr_to_field_path(const char *pathstr, |
| 635 | struct ctf_field_path *field_path, struct resolve_context *ctx) |
| 636 | { |
| 637 | int ret = 0; |
| 638 | enum ctf_scope root_scope; |
| 639 | GList *ptokens = NULL; |
| 640 | |
| 641 | /* Convert path string to path tokens */ |
| 642 | ptokens = pathstr_to_ptokens(pathstr, ctx); |
| 643 | if (!ptokens) { |
| 644 | BT_COMP_LOGE("Cannot convert path string to path tokens: " |
| 645 | "path=\"%s\"", pathstr); |
| 646 | ret = -1; |
| 647 | goto end; |
| 648 | } |
| 649 | |
| 650 | /* Absolute or relative path? */ |
| 651 | root_scope = get_root_scope_from_absolute_pathstr(pathstr, ctx); |
| 652 | |
| 653 | if (root_scope == CTF_SCOPE_PACKET_UNKNOWN) { |
| 654 | /* Relative path: start with current root scope */ |
| 655 | field_path->root = ctx->root_scope; |
| 656 | BT_COMP_LOGD("Detected relative path: starting with current root scope: " |
| 657 | "scope=%s", ctf_scope_string(field_path->root)); |
| 658 | ret = relative_ptokens_to_field_path(ptokens, field_path, ctx); |
| 659 | if (ret) { |
| 660 | BT_COMP_LOGE("Cannot get relative field path of path string: " |
| 661 | "path=\"%s\", start-scope=%s, end-scope=%s", |
| 662 | pathstr, ctf_scope_string(ctx->root_scope), |
| 663 | ctf_scope_string(field_path->root)); |
| 664 | goto end; |
| 665 | } |
| 666 | } else { |
| 667 | /* Absolute path: use found root scope */ |
| 668 | field_path->root = root_scope; |
| 669 | BT_COMP_LOGD("Detected absolute path: using root scope: " |
| 670 | "scope=%s", ctf_scope_string(field_path->root)); |
| 671 | ret = absolute_ptokens_to_field_path(ptokens, field_path, ctx); |
| 672 | if (ret) { |
| 673 | BT_COMP_LOGE("Cannot get absolute field path of path string: " |
| 674 | "path=\"%s\", root-scope=%s", |
| 675 | pathstr, ctf_scope_string(root_scope)); |
| 676 | goto end; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | if (BT_LOG_ON_TRACE && ret == 0) { |
| 681 | GString *field_path_pretty = ctf_field_path_string(field_path); |
| 682 | const char *field_path_pretty_str = |
| 683 | field_path_pretty ? field_path_pretty->str : NULL; |
| 684 | |
| 685 | BT_COMP_LOGD("Found field path: path=\"%s\", field-path=\"%s\"", |
| 686 | pathstr, field_path_pretty_str); |
| 687 | |
| 688 | if (field_path_pretty) { |
| 689 | g_string_free(field_path_pretty, TRUE); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | end: |
| 694 | ptokens_destroy(ptokens); |
| 695 | return ret; |
| 696 | } |
| 697 | |
| 698 | /* |
| 699 | * Retrieves a field class by following the field path `field_path` in |
| 700 | * the resolving context `ctx`. |
| 701 | */ |
| 702 | static |
| 703 | struct ctf_field_class *field_path_to_field_class( |
| 704 | struct ctf_field_path *field_path, struct resolve_context *ctx) |
| 705 | { |
| 706 | uint64_t i; |
| 707 | struct ctf_field_class *fc; |
| 708 | |
| 709 | /* Start with root class */ |
| 710 | fc = borrow_class_from_ctx(ctx, field_path->root); |
| 711 | if (!fc) { |
| 712 | /* Error: root class is not available */ |
| 713 | BT_COMP_LOGE("Root field class is not available: root-scope=%s", |
| 714 | ctf_scope_string(field_path->root)); |
| 715 | goto end; |
| 716 | } |
| 717 | |
| 718 | /* Locate target */ |
| 719 | for (i = 0; i < field_path->path->len; i++) { |
| 720 | struct ctf_field_class *child_fc; |
| 721 | int64_t child_index = |
| 722 | ctf_field_path_borrow_index_by_index(field_path, i); |
| 723 | |
| 724 | /* Get child field class */ |
| 725 | child_fc = ctf_field_class_compound_borrow_field_class_by_index( |
| 726 | fc, child_index); |
| 727 | BT_ASSERT(child_fc); |
| 728 | |
| 729 | /* Move child class to current class */ |
| 730 | fc = child_fc; |
| 731 | } |
| 732 | |
| 733 | end: |
| 734 | return fc; |
| 735 | } |
| 736 | |
| 737 | /* |
| 738 | * Fills the equivalent field path object of the context class stack. |
| 739 | */ |
| 740 | static |
| 741 | void get_ctx_stack_field_path(struct resolve_context *ctx, |
| 742 | struct ctf_field_path *field_path) |
| 743 | { |
| 744 | uint64_t i; |
| 745 | |
| 746 | BT_ASSERT(field_path); |
| 747 | field_path->root = ctx->root_scope; |
| 748 | ctf_field_path_clear(field_path); |
| 749 | |
| 750 | for (i = 0; i < field_class_stack_size(ctx->field_class_stack); i++) { |
| 751 | struct field_class_stack_frame *frame = |
| 752 | field_class_stack_at(ctx->field_class_stack, i); |
| 753 | |
| 754 | ctf_field_path_append_index(field_path, frame->index); |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | /* |
| 759 | * Returns the index of the lowest common ancestor of two field path |
| 760 | * objects having the same root scope. |
| 761 | */ |
| 762 | int64_t get_field_paths_lca_index(struct ctf_field_path *field_path1, |
| 763 | struct ctf_field_path *field_path2, |
| 764 | struct resolve_context *ctx) |
| 765 | { |
| 766 | int64_t lca_index = 0; |
| 767 | uint64_t field_path1_len, field_path2_len; |
| 768 | |
| 769 | if (BT_LOG_ON_TRACE) { |
| 770 | GString *field_path1_pretty = |
| 771 | ctf_field_path_string(field_path1); |
| 772 | GString *field_path2_pretty = |
| 773 | ctf_field_path_string(field_path2); |
| 774 | const char *field_path1_pretty_str = |
| 775 | field_path1_pretty ? field_path1_pretty->str : NULL; |
| 776 | const char *field_path2_pretty_str = |
| 777 | field_path2_pretty ? field_path2_pretty->str : NULL; |
| 778 | |
| 779 | BT_COMP_LOGD("Finding lowest common ancestor (LCA) between two field paths: " |
| 780 | "field-path-1=\"%s\", field-path-2=\"%s\"", |
| 781 | field_path1_pretty_str, field_path2_pretty_str); |
| 782 | |
| 783 | if (field_path1_pretty) { |
| 784 | g_string_free(field_path1_pretty, TRUE); |
| 785 | } |
| 786 | |
| 787 | if (field_path2_pretty) { |
| 788 | g_string_free(field_path2_pretty, TRUE); |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | /* |
| 793 | * Start from both roots and find the first mismatch. |
| 794 | */ |
| 795 | BT_ASSERT(field_path1->root == field_path2->root); |
| 796 | field_path1_len = field_path1->path->len; |
| 797 | field_path2_len = field_path2->path->len; |
| 798 | |
| 799 | while (true) { |
| 800 | int64_t target_index, ctx_index; |
| 801 | |
| 802 | if (lca_index == (int64_t) field_path2_len || |
| 803 | lca_index == (int64_t) field_path1_len) { |
| 804 | /* |
| 805 | * This means that both field paths never split. |
| 806 | * This is invalid because the target cannot be |
| 807 | * an ancestor of the source. |
| 808 | */ |
| 809 | BT_COMP_LOGE("Source field class is an ancestor of target field class or vice versa: " |
| 810 | "lca-index=%" PRId64 ", " |
| 811 | "field-path-1-len=%" PRIu64 ", " |
| 812 | "field-path-2-len=%" PRIu64, |
| 813 | lca_index, field_path1_len, field_path2_len); |
| 814 | lca_index = -1; |
| 815 | break; |
| 816 | } |
| 817 | |
| 818 | target_index = ctf_field_path_borrow_index_by_index(field_path1, |
| 819 | lca_index); |
| 820 | ctx_index = ctf_field_path_borrow_index_by_index(field_path2, |
| 821 | lca_index); |
| 822 | |
| 823 | if (target_index != ctx_index) { |
| 824 | /* LCA index is the previous */ |
| 825 | break; |
| 826 | } |
| 827 | |
| 828 | lca_index++; |
| 829 | } |
| 830 | |
| 831 | BT_COMP_LOGD("Found LCA: lca-index=%" PRId64, lca_index); |
| 832 | return lca_index; |
| 833 | } |
| 834 | |
| 835 | /* |
| 836 | * Validates a target field path. |
| 837 | */ |
| 838 | static |
| 839 | int validate_target_field_path(struct ctf_field_path *target_field_path, |
| 840 | struct ctf_field_class *target_fc, |
| 841 | struct resolve_context *ctx) |
| 842 | { |
| 843 | int ret = 0; |
| 844 | struct ctf_field_path ctx_field_path; |
| 845 | uint64_t target_field_path_len = target_field_path->path->len; |
| 846 | int64_t lca_index; |
| 847 | |
| 848 | /* Get context field path */ |
| 849 | ctf_field_path_init(&ctx_field_path); |
| 850 | get_ctx_stack_field_path(ctx, &ctx_field_path); |
| 851 | |
| 852 | /* |
| 853 | * Make sure the target is not a root. |
| 854 | */ |
| 855 | if (target_field_path_len == 0) { |
| 856 | BT_COMP_LOGE_STR("Target field path's length is 0 (targeting the root)."); |
| 857 | ret = -1; |
| 858 | goto end; |
| 859 | } |
| 860 | |
| 861 | /* |
| 862 | * Make sure the root of the target field path is not located |
| 863 | * after the context field path's root. |
| 864 | */ |
| 865 | if (target_field_path->root > ctx_field_path.root) { |
| 866 | BT_COMP_LOGE("Target field class is located after source field class: " |
| 867 | "target-root=%s, source-root=%s", |
| 868 | ctf_scope_string(target_field_path->root), |
| 869 | ctf_scope_string(ctx_field_path.root)); |
| 870 | ret = -1; |
| 871 | goto end; |
| 872 | } |
| 873 | |
| 874 | if (target_field_path->root == ctx_field_path.root) { |
| 875 | int64_t target_index, ctx_index; |
| 876 | |
| 877 | /* |
| 878 | * Find the index of the lowest common ancestor of both field |
| 879 | * paths. |
| 880 | */ |
| 881 | lca_index = get_field_paths_lca_index(target_field_path, |
| 882 | &ctx_field_path, ctx); |
| 883 | if (lca_index < 0) { |
| 884 | BT_COMP_LOGE_STR("Cannot get least common ancestor."); |
| 885 | ret = -1; |
| 886 | goto end; |
| 887 | } |
| 888 | |
| 889 | /* |
| 890 | * Make sure the target field path is located before the |
| 891 | * context field path. |
| 892 | */ |
| 893 | target_index = ctf_field_path_borrow_index_by_index( |
| 894 | target_field_path, (uint64_t) lca_index); |
| 895 | ctx_index = ctf_field_path_borrow_index_by_index( |
| 896 | &ctx_field_path, (uint64_t) lca_index); |
| 897 | |
| 898 | if (target_index >= ctx_index) { |
| 899 | BT_COMP_LOGE("Target field class's index is greater than or equal to source field class's index in LCA: " |
| 900 | "lca-index=%" PRId64 ", " |
| 901 | "target-index=%" PRId64 ", " |
| 902 | "source-index=%" PRId64, |
| 903 | lca_index, target_index, ctx_index); |
| 904 | ret = -1; |
| 905 | goto end; |
| 906 | } |
| 907 | } |
| 908 | |
| 909 | /* |
| 910 | * Make sure the target class has the right class and properties. |
| 911 | */ |
| 912 | switch (ctx->cur_fc->type) { |
| 913 | case CTF_FIELD_CLASS_TYPE_VARIANT: |
| 914 | if (target_fc->type != CTF_FIELD_CLASS_TYPE_ENUM) { |
| 915 | BT_COMP_LOGE("Variant field class's tag field class is not an enumeration field class: " |
| 916 | "tag-fc-addr=%p, tag-fc-id=%d", |
| 917 | target_fc, target_fc->type); |
| 918 | ret = -1; |
| 919 | goto end; |
| 920 | } |
| 921 | break; |
| 922 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: |
| 923 | { |
| 924 | struct ctf_field_class_int *int_fc = (void *) target_fc; |
| 925 | |
| 926 | if (target_fc->type != CTF_FIELD_CLASS_TYPE_INT && |
| 927 | target_fc->type != CTF_FIELD_CLASS_TYPE_ENUM) { |
| 928 | BT_COMP_LOGE("Sequence field class's length field class is not an unsigned integer field class: " |
| 929 | "length-fc-addr=%p, length-fc-id=%d", |
| 930 | target_fc, target_fc->type); |
| 931 | ret = -1; |
| 932 | goto end; |
| 933 | } |
| 934 | |
| 935 | if (int_fc->is_signed) { |
| 936 | BT_COMP_LOGE("Sequence field class's length field class is not an unsigned integer field class: " |
| 937 | "length-fc-addr=%p, length-fc-id=%d", |
| 938 | target_fc, target_fc->type); |
| 939 | ret = -1; |
| 940 | goto end; |
| 941 | } |
| 942 | break; |
| 943 | } |
| 944 | default: |
| 945 | abort(); |
| 946 | } |
| 947 | |
| 948 | end: |
| 949 | ctf_field_path_fini(&ctx_field_path); |
| 950 | return ret; |
| 951 | } |
| 952 | |
| 953 | /* |
| 954 | * Resolves a variant or sequence field class `fc`. |
| 955 | */ |
| 956 | static |
| 957 | int resolve_sequence_or_variant_field_class(struct ctf_field_class *fc, |
| 958 | struct resolve_context *ctx) |
| 959 | { |
| 960 | int ret = 0; |
| 961 | const char *pathstr; |
| 962 | struct ctf_field_path target_field_path; |
| 963 | struct ctf_field_class *target_fc = NULL; |
| 964 | GString *target_field_path_pretty = NULL; |
| 965 | const char *target_field_path_pretty_str; |
| 966 | |
| 967 | ctf_field_path_init(&target_field_path); |
| 968 | |
| 969 | /* Get path string */ |
| 970 | switch (fc->type) { |
| 971 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: |
| 972 | { |
| 973 | struct ctf_field_class_sequence *seq_fc = (void *) fc; |
| 974 | pathstr = seq_fc->length_ref->str; |
| 975 | break; |
| 976 | } |
| 977 | case CTF_FIELD_CLASS_TYPE_VARIANT: |
| 978 | { |
| 979 | struct ctf_field_class_variant *var_fc = (void *) fc; |
| 980 | pathstr = var_fc->tag_ref->str; |
| 981 | break; |
| 982 | } |
| 983 | default: |
| 984 | abort(); |
| 985 | } |
| 986 | |
| 987 | if (!pathstr) { |
| 988 | BT_COMP_LOGE_STR("Cannot get path string."); |
| 989 | ret = -1; |
| 990 | goto end; |
| 991 | } |
| 992 | |
| 993 | /* Get target field path out of path string */ |
| 994 | ret = pathstr_to_field_path(pathstr, &target_field_path, ctx); |
| 995 | if (ret) { |
| 996 | BT_COMP_LOGE("Cannot get target field path for path string: " |
| 997 | "path=\"%s\"", pathstr); |
| 998 | goto end; |
| 999 | } |
| 1000 | |
| 1001 | target_field_path_pretty = ctf_field_path_string( |
| 1002 | &target_field_path); |
| 1003 | target_field_path_pretty_str = |
| 1004 | target_field_path_pretty ? target_field_path_pretty->str : NULL; |
| 1005 | |
| 1006 | /* Get target field class */ |
| 1007 | target_fc = field_path_to_field_class(&target_field_path, ctx); |
| 1008 | if (!target_fc) { |
| 1009 | BT_COMP_LOGE("Cannot get target field class for path string: " |
| 1010 | "path=\"%s\", target-field-path=\"%s\"", |
| 1011 | pathstr, target_field_path_pretty_str); |
| 1012 | ret = -1; |
| 1013 | goto end; |
| 1014 | } |
| 1015 | |
| 1016 | ret = validate_target_field_path(&target_field_path, |
| 1017 | target_fc, ctx); |
| 1018 | if (ret) { |
| 1019 | BT_COMP_LOGE("Invalid target field path for path string: " |
| 1020 | "path=\"%s\", target-field-path=\"%s\"", |
| 1021 | pathstr, target_field_path_pretty_str); |
| 1022 | goto end; |
| 1023 | } |
| 1024 | |
| 1025 | /* Set target field path and target field class */ |
| 1026 | switch (fc->type) { |
| 1027 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: |
| 1028 | { |
| 1029 | struct ctf_field_class_sequence *seq_fc = (void *) fc; |
| 1030 | |
| 1031 | ctf_field_path_copy_content(&seq_fc->length_path, |
| 1032 | &target_field_path); |
| 1033 | seq_fc->length_fc = (void *) target_fc; |
| 1034 | break; |
| 1035 | } |
| 1036 | case CTF_FIELD_CLASS_TYPE_VARIANT: |
| 1037 | { |
| 1038 | struct ctf_field_class_variant *var_fc = (void *) fc; |
| 1039 | |
| 1040 | ctf_field_path_copy_content(&var_fc->tag_path, |
| 1041 | &target_field_path); |
| 1042 | ctf_field_class_variant_set_tag_field_class(var_fc, |
| 1043 | (void *) target_fc); |
| 1044 | break; |
| 1045 | } |
| 1046 | default: |
| 1047 | abort(); |
| 1048 | } |
| 1049 | |
| 1050 | end: |
| 1051 | if (target_field_path_pretty) { |
| 1052 | g_string_free(target_field_path_pretty, TRUE); |
| 1053 | } |
| 1054 | |
| 1055 | ctf_field_path_fini(&target_field_path); |
| 1056 | return ret; |
| 1057 | } |
| 1058 | |
| 1059 | /* |
| 1060 | * Resolves a field class `fc`. |
| 1061 | */ |
| 1062 | static |
| 1063 | int resolve_field_class(struct ctf_field_class *fc, struct resolve_context *ctx) |
| 1064 | { |
| 1065 | int ret = 0; |
| 1066 | |
| 1067 | if (!fc) { |
| 1068 | /* Field class is not available; still valid */ |
| 1069 | goto end; |
| 1070 | } |
| 1071 | |
| 1072 | ctx->cur_fc = fc; |
| 1073 | |
| 1074 | /* Resolve sequence/variant field class */ |
| 1075 | switch (fc->type) { |
| 1076 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: |
| 1077 | case CTF_FIELD_CLASS_TYPE_VARIANT: |
| 1078 | ret = resolve_sequence_or_variant_field_class(fc, ctx); |
| 1079 | if (ret) { |
| 1080 | BT_COMP_LOGE("Cannot resolve sequence field class's length or variant field class's tag: " |
| 1081 | "ret=%d, fc-addr=%p", ret, fc); |
| 1082 | goto end; |
| 1083 | } |
| 1084 | |
| 1085 | break; |
| 1086 | default: |
| 1087 | break; |
| 1088 | } |
| 1089 | |
| 1090 | /* Recurse into compound classes */ |
| 1091 | switch (fc->type) { |
| 1092 | case CTF_FIELD_CLASS_TYPE_STRUCT: |
| 1093 | case CTF_FIELD_CLASS_TYPE_VARIANT: |
| 1094 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: |
| 1095 | case CTF_FIELD_CLASS_TYPE_ARRAY: |
| 1096 | { |
| 1097 | uint64_t i; |
| 1098 | uint64_t field_count = |
| 1099 | ctf_field_class_compound_get_field_class_count(fc); |
| 1100 | |
| 1101 | ret = field_class_stack_push(ctx->field_class_stack, fc, ctx); |
| 1102 | if (ret) { |
| 1103 | BT_COMP_LOGE("Cannot push field class on context's stack: " |
| 1104 | "fc-addr=%p", fc); |
| 1105 | goto end; |
| 1106 | } |
| 1107 | |
| 1108 | for (i = 0; i < field_count; i++) { |
| 1109 | struct ctf_field_class *child_fc = |
| 1110 | ctf_field_class_compound_borrow_field_class_by_index( |
| 1111 | fc, i); |
| 1112 | |
| 1113 | BT_ASSERT(child_fc); |
| 1114 | |
| 1115 | if (fc->type == CTF_FIELD_CLASS_TYPE_ARRAY|| |
| 1116 | fc->type == CTF_FIELD_CLASS_TYPE_SEQUENCE) { |
| 1117 | field_class_stack_peek( |
| 1118 | ctx->field_class_stack)->index = -1; |
| 1119 | } else { |
| 1120 | field_class_stack_peek( |
| 1121 | ctx->field_class_stack)->index = |
| 1122 | (int64_t) i; |
| 1123 | } |
| 1124 | |
| 1125 | BT_COMP_LOGD("Resolving field class's child field class: " |
| 1126 | "parent-fc-addr=%p, child-fc-addr=%p, " |
| 1127 | "index=%" PRIu64 ", count=%" PRIu64, |
| 1128 | fc, child_fc, i, field_count); |
| 1129 | ret = resolve_field_class(child_fc, ctx); |
| 1130 | if (ret) { |
| 1131 | goto end; |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | field_class_stack_pop(ctx->field_class_stack, ctx); |
| 1136 | break; |
| 1137 | } |
| 1138 | default: |
| 1139 | break; |
| 1140 | } |
| 1141 | |
| 1142 | end: |
| 1143 | return ret; |
| 1144 | } |
| 1145 | |
| 1146 | /* |
| 1147 | * Resolves the root field class corresponding to the scope `root_scope`. |
| 1148 | */ |
| 1149 | static |
| 1150 | int resolve_root_class(enum ctf_scope root_scope, struct resolve_context *ctx) |
| 1151 | { |
| 1152 | int ret; |
| 1153 | |
| 1154 | BT_ASSERT(field_class_stack_size(ctx->field_class_stack) == 0); |
| 1155 | ctx->root_scope = root_scope; |
| 1156 | ret = resolve_field_class(borrow_class_from_ctx(ctx, root_scope), ctx); |
| 1157 | ctx->root_scope = -1; |
| 1158 | return ret; |
| 1159 | } |
| 1160 | |
| 1161 | static |
| 1162 | int resolve_event_class_field_classes(struct resolve_context *ctx, |
| 1163 | struct ctf_event_class *ec) |
| 1164 | { |
| 1165 | int ret = 0; |
| 1166 | |
| 1167 | BT_ASSERT(!ctx->scopes.event_spec_context); |
| 1168 | BT_ASSERT(!ctx->scopes.event_payload); |
| 1169 | |
| 1170 | if (ec->is_translated) { |
| 1171 | goto end; |
| 1172 | } |
| 1173 | |
| 1174 | ctx->ec = ec; |
| 1175 | ctx->scopes.event_spec_context = ec->spec_context_fc; |
| 1176 | ret = resolve_root_class(CTF_SCOPE_EVENT_COMMON_CONTEXT, ctx); |
| 1177 | if (ret) { |
| 1178 | BT_COMP_LOGE("Cannot resolve event specific context field class: " |
| 1179 | "ret=%d", ret); |
| 1180 | goto end; |
| 1181 | } |
| 1182 | |
| 1183 | ctx->scopes.event_payload = ec->payload_fc; |
| 1184 | ret = resolve_root_class(CTF_SCOPE_EVENT_PAYLOAD, ctx); |
| 1185 | if (ret) { |
| 1186 | BT_COMP_LOGE("Cannot resolve event payload field class: " |
| 1187 | "ret=%d", ret); |
| 1188 | goto end; |
| 1189 | } |
| 1190 | |
| 1191 | end: |
| 1192 | ctx->scopes.event_spec_context = NULL; |
| 1193 | ctx->scopes.event_payload = NULL; |
| 1194 | ctx->ec = NULL; |
| 1195 | return ret; |
| 1196 | } |
| 1197 | |
| 1198 | static |
| 1199 | int resolve_stream_class_field_classes(struct resolve_context *ctx, |
| 1200 | struct ctf_stream_class *sc) |
| 1201 | { |
| 1202 | int ret = 0; |
| 1203 | uint64_t i; |
| 1204 | |
| 1205 | BT_ASSERT(!ctx->scopes.packet_context); |
| 1206 | BT_ASSERT(!ctx->scopes.event_header); |
| 1207 | BT_ASSERT(!ctx->scopes.event_common_context); |
| 1208 | ctx->sc = sc; |
| 1209 | |
| 1210 | if (!sc->is_translated) { |
| 1211 | ctx->scopes.packet_context = sc->packet_context_fc; |
| 1212 | ret = resolve_root_class(CTF_SCOPE_PACKET_CONTEXT, ctx); |
| 1213 | if (ret) { |
| 1214 | BT_COMP_LOGE("Cannot resolve packet context field class: " |
| 1215 | "ret=%d", ret); |
| 1216 | goto end; |
| 1217 | } |
| 1218 | |
| 1219 | ctx->scopes.event_header = sc->event_header_fc; |
| 1220 | ret = resolve_root_class(CTF_SCOPE_EVENT_HEADER, ctx); |
| 1221 | if (ret) { |
| 1222 | BT_COMP_LOGE("Cannot resolve event header field class: " |
| 1223 | "ret=%d", ret); |
| 1224 | goto end; |
| 1225 | } |
| 1226 | |
| 1227 | ctx->scopes.event_common_context = sc->event_common_context_fc; |
| 1228 | ret = resolve_root_class(CTF_SCOPE_EVENT_SPECIFIC_CONTEXT, ctx); |
| 1229 | if (ret) { |
| 1230 | BT_COMP_LOGE("Cannot resolve event common context field class: " |
| 1231 | "ret=%d", ret); |
| 1232 | goto end; |
| 1233 | } |
| 1234 | } |
| 1235 | |
| 1236 | ctx->scopes.packet_context = sc->packet_context_fc; |
| 1237 | ctx->scopes.event_header = sc->event_header_fc; |
| 1238 | ctx->scopes.event_common_context = sc->event_common_context_fc; |
| 1239 | |
| 1240 | for (i = 0; i < sc->event_classes->len; i++) { |
| 1241 | struct ctf_event_class *ec = sc->event_classes->pdata[i]; |
| 1242 | |
| 1243 | ret = resolve_event_class_field_classes(ctx, ec); |
| 1244 | if (ret) { |
| 1245 | BT_COMP_LOGE("Cannot resolve event class's field classes: " |
| 1246 | "ec-id=%" PRIu64 ", ec-name=\"%s\"", |
| 1247 | ec->id, ec->name->str); |
| 1248 | goto end; |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | end: |
| 1253 | ctx->scopes.packet_context = NULL; |
| 1254 | ctx->scopes.event_header = NULL; |
| 1255 | ctx->scopes.event_common_context = NULL; |
| 1256 | ctx->sc = NULL; |
| 1257 | return ret; |
| 1258 | } |
| 1259 | |
| 1260 | BT_HIDDEN |
| 1261 | int ctf_trace_class_resolve_field_classes(struct ctf_trace_class *tc, |
| 1262 | struct meta_log_config *log_cfg) |
| 1263 | { |
| 1264 | int ret = 0; |
| 1265 | uint64_t i; |
| 1266 | struct resolve_context local_ctx = { |
| 1267 | .log_level = log_cfg->log_level, |
| 1268 | .self_comp = log_cfg->self_comp, |
| 1269 | .tc = tc, |
| 1270 | .sc = NULL, |
| 1271 | .ec = NULL, |
| 1272 | .scopes = { |
| 1273 | .packet_header = tc->packet_header_fc, |
| 1274 | .packet_context = NULL, |
| 1275 | .event_header = NULL, |
| 1276 | .event_common_context = NULL, |
| 1277 | .event_spec_context = NULL, |
| 1278 | .event_payload = NULL, |
| 1279 | }, |
| 1280 | .root_scope = CTF_SCOPE_PACKET_HEADER, |
| 1281 | .cur_fc = NULL, |
| 1282 | }; |
| 1283 | struct resolve_context *ctx = &local_ctx; |
| 1284 | |
| 1285 | /* Initialize class stack */ |
| 1286 | ctx->field_class_stack = field_class_stack_create(); |
| 1287 | if (!ctx->field_class_stack) { |
| 1288 | BT_COMP_LOGE_STR("Cannot create field class stack."); |
| 1289 | ret = -1; |
| 1290 | goto end; |
| 1291 | } |
| 1292 | |
| 1293 | if (!tc->is_translated) { |
| 1294 | ctx->scopes.packet_header = tc->packet_header_fc; |
| 1295 | ret = resolve_root_class(CTF_SCOPE_PACKET_HEADER, ctx); |
| 1296 | if (ret) { |
| 1297 | BT_COMP_LOGE("Cannot resolve packet header field class: " |
| 1298 | "ret=%d", ret); |
| 1299 | goto end; |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | ctx->scopes.packet_header = tc->packet_header_fc; |
| 1304 | |
| 1305 | for (i = 0; i < tc->stream_classes->len; i++) { |
| 1306 | struct ctf_stream_class *sc = tc->stream_classes->pdata[i]; |
| 1307 | |
| 1308 | ret = resolve_stream_class_field_classes(ctx, sc); |
| 1309 | if (ret) { |
| 1310 | BT_COMP_LOGE("Cannot resolve stream class's field classes: " |
| 1311 | "sc-id=%" PRIu64, sc->id); |
| 1312 | goto end; |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | end: |
| 1317 | field_class_stack_destroy(ctx->field_class_stack); |
| 1318 | return ret; |
| 1319 | } |