| 1 | /* |
| 2 | * event-field-value.c |
| 3 | * |
| 4 | * Linux Trace Toolkit Control Library |
| 5 | * |
| 6 | * Copyright (C) 2020 Philippe Proulx <pproulx@efficios.com> |
| 7 | * |
| 8 | * SPDX-License-Identifier: LGPL-2.1-only |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #define _LGPL_SOURCE |
| 13 | #include <common/error.hpp> |
| 14 | #include <common/macros.hpp> |
| 15 | |
| 16 | #include <lttng/event-field-value-internal.hpp> |
| 17 | |
| 18 | #include <stdbool.h> |
| 19 | #include <stddef.h> |
| 20 | |
| 21 | static struct lttng_event_field_value * |
| 22 | create_empty_field_val(enum lttng_event_field_value_type type, size_t size) |
| 23 | { |
| 24 | struct lttng_event_field_value *field_val; |
| 25 | |
| 26 | field_val = zmalloc<lttng_event_field_value>(size); |
| 27 | if (!field_val) { |
| 28 | goto end; |
| 29 | } |
| 30 | |
| 31 | field_val->type = type; |
| 32 | |
| 33 | end: |
| 34 | return field_val; |
| 35 | } |
| 36 | |
| 37 | struct lttng_event_field_value *lttng_event_field_value_uint_create(uint64_t val) |
| 38 | { |
| 39 | struct lttng_event_field_value_uint *field_val; |
| 40 | |
| 41 | field_val = lttng::utils::container_of( |
| 42 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_INT, |
| 43 | sizeof(*field_val)), |
| 44 | <tng_event_field_value_uint::parent); |
| 45 | if (!field_val) { |
| 46 | goto error; |
| 47 | } |
| 48 | |
| 49 | field_val->val = val; |
| 50 | goto end; |
| 51 | |
| 52 | error: |
| 53 | lttng_event_field_value_destroy(&field_val->parent); |
| 54 | |
| 55 | end: |
| 56 | return &field_val->parent; |
| 57 | } |
| 58 | |
| 59 | struct lttng_event_field_value *lttng_event_field_value_int_create(int64_t val) |
| 60 | { |
| 61 | struct lttng_event_field_value_int *field_val; |
| 62 | |
| 63 | field_val = lttng::utils::container_of( |
| 64 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_INT, sizeof(*field_val)), |
| 65 | <tng_event_field_value_int::parent); |
| 66 | if (!field_val) { |
| 67 | goto error; |
| 68 | } |
| 69 | |
| 70 | field_val->val = val; |
| 71 | goto end; |
| 72 | |
| 73 | error: |
| 74 | lttng_event_field_value_destroy(&field_val->parent); |
| 75 | |
| 76 | end: |
| 77 | return &field_val->parent; |
| 78 | } |
| 79 | |
| 80 | static struct lttng_event_field_value_enum * |
| 81 | create_enum_field_val(enum lttng_event_field_value_type type, size_t size) |
| 82 | { |
| 83 | struct lttng_event_field_value_enum *field_val; |
| 84 | |
| 85 | field_val = lttng::utils::container_of(create_empty_field_val(type, size), |
| 86 | <tng_event_field_value_enum::parent); |
| 87 | if (!field_val) { |
| 88 | goto error; |
| 89 | } |
| 90 | |
| 91 | lttng_dynamic_pointer_array_init(&field_val->labels, free); |
| 92 | goto end; |
| 93 | |
| 94 | error: |
| 95 | lttng_event_field_value_destroy(&field_val->parent); |
| 96 | |
| 97 | end: |
| 98 | return field_val; |
| 99 | } |
| 100 | |
| 101 | struct lttng_event_field_value *lttng_event_field_value_enum_uint_create(uint64_t val) |
| 102 | { |
| 103 | struct lttng_event_field_value_enum_uint *field_val; |
| 104 | |
| 105 | field_val = lttng::utils::container_of( |
| 106 | create_enum_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM, |
| 107 | sizeof(*field_val)), |
| 108 | <tng_event_field_value_enum_uint::parent); |
| 109 | if (!field_val) { |
| 110 | goto error; |
| 111 | } |
| 112 | |
| 113 | field_val->val = val; |
| 114 | goto end; |
| 115 | |
| 116 | error: |
| 117 | lttng_event_field_value_destroy(&field_val->parent.parent); |
| 118 | |
| 119 | end: |
| 120 | return &field_val->parent.parent; |
| 121 | } |
| 122 | |
| 123 | struct lttng_event_field_value *lttng_event_field_value_enum_int_create(int64_t val) |
| 124 | { |
| 125 | struct lttng_event_field_value_enum_int *field_val; |
| 126 | |
| 127 | field_val = lttng::utils::container_of( |
| 128 | create_enum_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM, sizeof(*field_val)), |
| 129 | <tng_event_field_value_enum_int::parent); |
| 130 | if (!field_val) { |
| 131 | goto error; |
| 132 | } |
| 133 | |
| 134 | field_val->val = val; |
| 135 | goto end; |
| 136 | |
| 137 | error: |
| 138 | lttng_event_field_value_destroy(&field_val->parent.parent); |
| 139 | |
| 140 | end: |
| 141 | return &field_val->parent.parent; |
| 142 | } |
| 143 | |
| 144 | struct lttng_event_field_value *lttng_event_field_value_real_create(double val) |
| 145 | { |
| 146 | struct lttng_event_field_value_real *field_val = lttng::utils::container_of( |
| 147 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_REAL, sizeof(*field_val)), |
| 148 | <tng_event_field_value_real::parent); |
| 149 | |
| 150 | if (!field_val) { |
| 151 | goto error; |
| 152 | } |
| 153 | |
| 154 | field_val->val = val; |
| 155 | goto end; |
| 156 | |
| 157 | error: |
| 158 | lttng_event_field_value_destroy(&field_val->parent); |
| 159 | |
| 160 | end: |
| 161 | return &field_val->parent; |
| 162 | } |
| 163 | |
| 164 | struct lttng_event_field_value *lttng_event_field_value_string_create_with_size(const char *val, |
| 165 | size_t size) |
| 166 | { |
| 167 | struct lttng_event_field_value_string *field_val = lttng::utils::container_of( |
| 168 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_STRING, sizeof(*field_val)), |
| 169 | <tng_event_field_value_string::parent); |
| 170 | |
| 171 | if (!field_val) { |
| 172 | goto error; |
| 173 | } |
| 174 | |
| 175 | if (size) { |
| 176 | LTTNG_ASSERT(val); |
| 177 | field_val->val = strndup(val, size); |
| 178 | } else { |
| 179 | /* |
| 180 | * User code do not expect a NULL string pointer. Populate with |
| 181 | * an empty string when length is 0. |
| 182 | */ |
| 183 | field_val->val = strdup(""); |
| 184 | } |
| 185 | if (!field_val->val) { |
| 186 | goto error; |
| 187 | } |
| 188 | |
| 189 | goto end; |
| 190 | |
| 191 | error: |
| 192 | lttng_event_field_value_destroy(&field_val->parent); |
| 193 | |
| 194 | end: |
| 195 | return &field_val->parent; |
| 196 | } |
| 197 | |
| 198 | struct lttng_event_field_value *lttng_event_field_value_string_create(const char *val) |
| 199 | { |
| 200 | LTTNG_ASSERT(val); |
| 201 | return lttng_event_field_value_string_create_with_size(val, strlen(val)); |
| 202 | } |
| 203 | |
| 204 | static void destroy_field_val(void *field_val) |
| 205 | { |
| 206 | lttng_event_field_value_destroy((lttng_event_field_value *) field_val); |
| 207 | } |
| 208 | |
| 209 | struct lttng_event_field_value *lttng_event_field_value_array_create() |
| 210 | { |
| 211 | struct lttng_event_field_value_array *field_val = lttng::utils::container_of( |
| 212 | create_empty_field_val(LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY, sizeof(*field_val)), |
| 213 | <tng_event_field_value_array::parent); |
| 214 | |
| 215 | if (!field_val) { |
| 216 | goto error; |
| 217 | } |
| 218 | |
| 219 | lttng_dynamic_pointer_array_init(&field_val->elems, destroy_field_val); |
| 220 | goto end; |
| 221 | |
| 222 | error: |
| 223 | lttng_event_field_value_destroy(&field_val->parent); |
| 224 | |
| 225 | end: |
| 226 | return &field_val->parent; |
| 227 | } |
| 228 | |
| 229 | void lttng_event_field_value_destroy(struct lttng_event_field_value *field_val) |
| 230 | { |
| 231 | if (!field_val) { |
| 232 | goto end; |
| 233 | } |
| 234 | |
| 235 | switch (field_val->type) { |
| 236 | case LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM: |
| 237 | case LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM: |
| 238 | { |
| 239 | struct lttng_event_field_value_enum *enum_field_val = lttng::utils::container_of( |
| 240 | field_val, <tng_event_field_value_enum::parent); |
| 241 | |
| 242 | lttng_dynamic_pointer_array_reset(&enum_field_val->labels); |
| 243 | break; |
| 244 | } |
| 245 | case LTTNG_EVENT_FIELD_VALUE_TYPE_STRING: |
| 246 | { |
| 247 | struct lttng_event_field_value_string *str_field_val = lttng::utils::container_of( |
| 248 | field_val, <tng_event_field_value_string::parent); |
| 249 | |
| 250 | free(str_field_val->val); |
| 251 | break; |
| 252 | } |
| 253 | case LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY: |
| 254 | { |
| 255 | struct lttng_event_field_value_array *array_field_expr = lttng::utils::container_of( |
| 256 | field_val, <tng_event_field_value_array::parent); |
| 257 | |
| 258 | lttng_dynamic_pointer_array_reset(&array_field_expr->elems); |
| 259 | break; |
| 260 | } |
| 261 | default: |
| 262 | break; |
| 263 | } |
| 264 | |
| 265 | free(field_val); |
| 266 | |
| 267 | end: |
| 268 | return; |
| 269 | } |
| 270 | |
| 271 | int lttng_event_field_value_enum_append_label_with_size(struct lttng_event_field_value *field_val, |
| 272 | const char *label, |
| 273 | size_t size) |
| 274 | { |
| 275 | int ret; |
| 276 | char *new_label; |
| 277 | |
| 278 | LTTNG_ASSERT(field_val); |
| 279 | LTTNG_ASSERT(label); |
| 280 | new_label = strndup(label, size); |
| 281 | if (!new_label) { |
| 282 | ret = -1; |
| 283 | goto end; |
| 284 | } |
| 285 | |
| 286 | ret = lttng_dynamic_pointer_array_add_pointer( |
| 287 | <tng::utils::container_of(field_val, <tng_event_field_value_enum::parent) |
| 288 | ->labels, |
| 289 | new_label); |
| 290 | if (ret == 0) { |
| 291 | new_label = nullptr; |
| 292 | } |
| 293 | |
| 294 | end: |
| 295 | free(new_label); |
| 296 | return ret; |
| 297 | } |
| 298 | |
| 299 | int lttng_event_field_value_enum_append_label(struct lttng_event_field_value *field_val, |
| 300 | const char *label) |
| 301 | { |
| 302 | LTTNG_ASSERT(label); |
| 303 | return lttng_event_field_value_enum_append_label_with_size(field_val, label, strlen(label)); |
| 304 | } |
| 305 | |
| 306 | int lttng_event_field_value_array_append(struct lttng_event_field_value *array_field_val, |
| 307 | struct lttng_event_field_value *field_val) |
| 308 | { |
| 309 | LTTNG_ASSERT(array_field_val); |
| 310 | LTTNG_ASSERT(field_val); |
| 311 | return lttng_dynamic_pointer_array_add_pointer( |
| 312 | <tng::utils::container_of(array_field_val, <tng_event_field_value_array::parent) |
| 313 | ->elems, |
| 314 | field_val); |
| 315 | } |
| 316 | |
| 317 | int lttng_event_field_value_array_append_unavailable(struct lttng_event_field_value *array_field_val) |
| 318 | { |
| 319 | LTTNG_ASSERT(array_field_val); |
| 320 | return lttng_dynamic_pointer_array_add_pointer( |
| 321 | <tng::utils::container_of(array_field_val, <tng_event_field_value_array::parent) |
| 322 | ->elems, |
| 323 | nullptr); |
| 324 | } |
| 325 | |
| 326 | enum lttng_event_field_value_type |
| 327 | lttng_event_field_value_get_type(const struct lttng_event_field_value *field_val) |
| 328 | { |
| 329 | enum lttng_event_field_value_type type; |
| 330 | |
| 331 | if (!field_val) { |
| 332 | type = LTTNG_EVENT_FIELD_VALUE_TYPE_INVALID; |
| 333 | goto end; |
| 334 | } |
| 335 | |
| 336 | type = field_val->type; |
| 337 | |
| 338 | end: |
| 339 | return type; |
| 340 | } |
| 341 | |
| 342 | enum lttng_event_field_value_status |
| 343 | lttng_event_field_value_unsigned_int_get_value(const struct lttng_event_field_value *field_val, |
| 344 | uint64_t *val) |
| 345 | { |
| 346 | enum lttng_event_field_value_status status; |
| 347 | |
| 348 | if (!field_val || !val) { |
| 349 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 350 | goto end; |
| 351 | } |
| 352 | |
| 353 | switch (field_val->type) { |
| 354 | case LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_INT: |
| 355 | *val = lttng::utils::container_of(field_val, <tng_event_field_value_uint::parent) |
| 356 | ->val; |
| 357 | break; |
| 358 | case LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM: |
| 359 | { |
| 360 | const struct lttng_event_field_value_enum *field_val_enum = |
| 361 | lttng::utils::container_of(field_val, |
| 362 | <tng_event_field_value_enum::parent); |
| 363 | const struct lttng_event_field_value_enum_uint *field_val_enum_uint = |
| 364 | lttng::utils::container_of(field_val_enum, |
| 365 | <tng_event_field_value_enum_uint::parent); |
| 366 | *val = field_val_enum_uint->val; |
| 367 | break; |
| 368 | } |
| 369 | default: |
| 370 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 371 | goto end; |
| 372 | } |
| 373 | |
| 374 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
| 375 | |
| 376 | end: |
| 377 | return status; |
| 378 | } |
| 379 | |
| 380 | enum lttng_event_field_value_status |
| 381 | lttng_event_field_value_signed_int_get_value(const struct lttng_event_field_value *field_val, |
| 382 | int64_t *val) |
| 383 | { |
| 384 | enum lttng_event_field_value_status status; |
| 385 | |
| 386 | if (!field_val || !val) { |
| 387 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 388 | goto end; |
| 389 | } |
| 390 | |
| 391 | switch (field_val->type) { |
| 392 | case LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_INT: |
| 393 | *val = lttng::utils::container_of(field_val, <tng_event_field_value_int::parent) |
| 394 | ->val; |
| 395 | break; |
| 396 | case LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM: |
| 397 | { |
| 398 | const struct lttng_event_field_value_enum *field_val_enum = |
| 399 | lttng::utils::container_of(field_val, |
| 400 | <tng_event_field_value_enum::parent); |
| 401 | const struct lttng_event_field_value_enum_int *field_val_enum_uint = |
| 402 | lttng::utils::container_of(field_val_enum, |
| 403 | <tng_event_field_value_enum_int::parent); |
| 404 | *val = field_val_enum_uint->val; |
| 405 | break; |
| 406 | } |
| 407 | default: |
| 408 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 409 | goto end; |
| 410 | } |
| 411 | |
| 412 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
| 413 | |
| 414 | end: |
| 415 | return status; |
| 416 | } |
| 417 | |
| 418 | enum lttng_event_field_value_status |
| 419 | lttng_event_field_value_real_get_value(const struct lttng_event_field_value *field_val, double *val) |
| 420 | { |
| 421 | enum lttng_event_field_value_status status; |
| 422 | |
| 423 | if (!field_val || field_val->type != LTTNG_EVENT_FIELD_VALUE_TYPE_REAL || !val) { |
| 424 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 425 | goto end; |
| 426 | } |
| 427 | |
| 428 | *val = lttng::utils::container_of(field_val, <tng_event_field_value_real::parent)->val; |
| 429 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
| 430 | |
| 431 | end: |
| 432 | return status; |
| 433 | } |
| 434 | |
| 435 | static bool is_enum_field_val(const struct lttng_event_field_value *field_val) |
| 436 | { |
| 437 | return field_val->type == LTTNG_EVENT_FIELD_VALUE_TYPE_UNSIGNED_ENUM || |
| 438 | field_val->type == LTTNG_EVENT_FIELD_VALUE_TYPE_SIGNED_ENUM; |
| 439 | } |
| 440 | |
| 441 | enum lttng_event_field_value_status |
| 442 | lttng_event_field_value_enum_get_label_count(const struct lttng_event_field_value *field_val, |
| 443 | unsigned int *count) |
| 444 | { |
| 445 | enum lttng_event_field_value_status status; |
| 446 | |
| 447 | if (!field_val || !is_enum_field_val(field_val) || !count) { |
| 448 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 449 | goto end; |
| 450 | } |
| 451 | |
| 452 | *count = (unsigned int) lttng_dynamic_pointer_array_get_count( |
| 453 | <tng::utils::container_of(field_val, <tng_event_field_value_enum::parent) |
| 454 | ->labels); |
| 455 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
| 456 | |
| 457 | end: |
| 458 | return status; |
| 459 | } |
| 460 | |
| 461 | const char * |
| 462 | lttng_event_field_value_enum_get_label_at_index(const struct lttng_event_field_value *field_val, |
| 463 | unsigned int index) |
| 464 | { |
| 465 | const char *ret; |
| 466 | const struct lttng_event_field_value_enum *enum_field_val; |
| 467 | |
| 468 | if (!field_val || !is_enum_field_val(field_val)) { |
| 469 | ret = nullptr; |
| 470 | goto end; |
| 471 | } |
| 472 | |
| 473 | enum_field_val = |
| 474 | lttng::utils::container_of(field_val, <tng_event_field_value_enum::parent); |
| 475 | |
| 476 | if (index >= lttng_dynamic_pointer_array_get_count(&enum_field_val->labels)) { |
| 477 | ret = nullptr; |
| 478 | goto end; |
| 479 | } |
| 480 | |
| 481 | ret = (const char *) lttng_dynamic_pointer_array_get_pointer(&enum_field_val->labels, |
| 482 | index); |
| 483 | |
| 484 | end: |
| 485 | return ret; |
| 486 | } |
| 487 | |
| 488 | enum lttng_event_field_value_status |
| 489 | lttng_event_field_value_string_get_value(const struct lttng_event_field_value *field_val, |
| 490 | const char **value) |
| 491 | { |
| 492 | enum lttng_event_field_value_status status; |
| 493 | |
| 494 | if (!field_val || field_val->type != LTTNG_EVENT_FIELD_VALUE_TYPE_STRING) { |
| 495 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 496 | goto end; |
| 497 | } |
| 498 | |
| 499 | *value = |
| 500 | lttng::utils::container_of(field_val, <tng_event_field_value_string::parent)->val; |
| 501 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
| 502 | |
| 503 | end: |
| 504 | return status; |
| 505 | } |
| 506 | |
| 507 | enum lttng_event_field_value_status |
| 508 | lttng_event_field_value_array_get_length(const struct lttng_event_field_value *field_val, |
| 509 | unsigned int *length) |
| 510 | { |
| 511 | enum lttng_event_field_value_status status; |
| 512 | |
| 513 | if (!field_val || field_val->type != LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY || !length) { |
| 514 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 515 | goto end; |
| 516 | } |
| 517 | |
| 518 | *length = (unsigned int) lttng_dynamic_pointer_array_get_count( |
| 519 | <tng::utils::container_of(field_val, <tng_event_field_value_array::parent) |
| 520 | ->elems); |
| 521 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
| 522 | |
| 523 | end: |
| 524 | return status; |
| 525 | } |
| 526 | |
| 527 | enum lttng_event_field_value_status lttng_event_field_value_array_get_element_at_index( |
| 528 | const struct lttng_event_field_value *field_val, |
| 529 | unsigned int index, |
| 530 | const struct lttng_event_field_value **elem_field_val) |
| 531 | { |
| 532 | enum lttng_event_field_value_status status; |
| 533 | const struct lttng_event_field_value_array *array_field_val; |
| 534 | |
| 535 | if (!field_val || field_val->type != LTTNG_EVENT_FIELD_VALUE_TYPE_ARRAY || |
| 536 | !elem_field_val) { |
| 537 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 538 | goto end; |
| 539 | } |
| 540 | |
| 541 | array_field_val = |
| 542 | lttng::utils::container_of(field_val, <tng_event_field_value_array::parent); |
| 543 | |
| 544 | if (index >= lttng_dynamic_pointer_array_get_count(&array_field_val->elems)) { |
| 545 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_INVALID; |
| 546 | goto end; |
| 547 | } |
| 548 | |
| 549 | *elem_field_val = (lttng_event_field_value *) lttng_dynamic_pointer_array_get_pointer( |
| 550 | &array_field_val->elems, index); |
| 551 | if (*elem_field_val) { |
| 552 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_OK; |
| 553 | } else { |
| 554 | status = LTTNG_EVENT_FIELD_VALUE_STATUS_UNAVAILABLE; |
| 555 | } |
| 556 | |
| 557 | end: |
| 558 | return status; |
| 559 | } |