| 1 | /* |
| 2 | * Copyright (C) 2020 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include "lttng/lttng-error.h" |
| 9 | #include <assert.h> |
| 10 | #include <common/error.h> |
| 11 | #include <common/macros.h> |
| 12 | #include <common/payload.h> |
| 13 | #include <common/payload-view.h> |
| 14 | #include <common/hashtable/hashtable.h> |
| 15 | #include <common/hashtable/utils.h> |
| 16 | #include <fcntl.h> |
| 17 | #include <lttng/constant.h> |
| 18 | #include <lttng/kernel-probe.h> |
| 19 | #include <lttng/kernel-probe-internal.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <sys/types.h> |
| 22 | #include <sys/unistd.h> |
| 23 | |
| 24 | static |
| 25 | int lttng_kernel_probe_location_address_serialize( |
| 26 | const struct lttng_kernel_probe_location *location, |
| 27 | struct lttng_payload *payload); |
| 28 | |
| 29 | static |
| 30 | int lttng_kernel_probe_location_symbol_serialize( |
| 31 | const struct lttng_kernel_probe_location *location, |
| 32 | struct lttng_payload *payload); |
| 33 | |
| 34 | static |
| 35 | bool lttng_kernel_probe_location_address_is_equal( |
| 36 | const struct lttng_kernel_probe_location *a, |
| 37 | const struct lttng_kernel_probe_location *b); |
| 38 | |
| 39 | static |
| 40 | bool lttng_kernel_probe_location_symbol_is_equal( |
| 41 | const struct lttng_kernel_probe_location *a, |
| 42 | const struct lttng_kernel_probe_location *b); |
| 43 | |
| 44 | static |
| 45 | unsigned long lttng_kernel_probe_location_address_hash( |
| 46 | const struct lttng_kernel_probe_location *location); |
| 47 | |
| 48 | static |
| 49 | unsigned long lttng_kernel_probe_location_symbol_hash( |
| 50 | const struct lttng_kernel_probe_location *location); |
| 51 | |
| 52 | enum lttng_kernel_probe_location_type lttng_kernel_probe_location_get_type( |
| 53 | const struct lttng_kernel_probe_location *location) |
| 54 | { |
| 55 | return location ? location->type : |
| 56 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_UNKNOWN; |
| 57 | } |
| 58 | |
| 59 | static |
| 60 | void lttng_kernel_probe_location_address_destroy( |
| 61 | struct lttng_kernel_probe_location *location) |
| 62 | { |
| 63 | assert(location); |
| 64 | free(location); |
| 65 | } |
| 66 | |
| 67 | static |
| 68 | void lttng_kernel_probe_location_symbol_destroy( |
| 69 | struct lttng_kernel_probe_location *location) |
| 70 | { |
| 71 | struct lttng_kernel_probe_location_symbol *location_symbol = NULL; |
| 72 | |
| 73 | assert(location); |
| 74 | |
| 75 | location_symbol = container_of(location, |
| 76 | struct lttng_kernel_probe_location_symbol, |
| 77 | parent); |
| 78 | |
| 79 | assert(location_symbol); |
| 80 | |
| 81 | free(location_symbol->symbol_name); |
| 82 | free(location); |
| 83 | } |
| 84 | |
| 85 | void lttng_kernel_probe_location_destroy( |
| 86 | struct lttng_kernel_probe_location *location) |
| 87 | { |
| 88 | if (!location) { |
| 89 | return; |
| 90 | } |
| 91 | |
| 92 | switch (location->type) { |
| 93 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: |
| 94 | lttng_kernel_probe_location_address_destroy(location); |
| 95 | break; |
| 96 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: |
| 97 | lttng_kernel_probe_location_symbol_destroy(location); |
| 98 | break; |
| 99 | default: |
| 100 | abort(); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | struct lttng_kernel_probe_location * |
| 105 | lttng_kernel_probe_location_address_create(uint64_t address) |
| 106 | { |
| 107 | struct lttng_kernel_probe_location *ret = NULL; |
| 108 | struct lttng_kernel_probe_location_address *location; |
| 109 | |
| 110 | location = zmalloc(sizeof(*location)); |
| 111 | if (!location) { |
| 112 | PERROR("Error allocating userspace probe location."); |
| 113 | goto end; |
| 114 | } |
| 115 | |
| 116 | location->address = address; |
| 117 | |
| 118 | ret = &location->parent; |
| 119 | ret->type = LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS; |
| 120 | ret->equal = lttng_kernel_probe_location_address_is_equal; |
| 121 | ret->serialize = lttng_kernel_probe_location_address_serialize; |
| 122 | ret->hash = lttng_kernel_probe_location_address_hash; |
| 123 | |
| 124 | end: |
| 125 | return ret; |
| 126 | } |
| 127 | |
| 128 | struct lttng_kernel_probe_location * |
| 129 | lttng_kernel_probe_location_symbol_create(const char *symbol_name, |
| 130 | uint64_t offset) |
| 131 | { |
| 132 | char *symbol_name_copy = NULL; |
| 133 | struct lttng_kernel_probe_location *ret = NULL; |
| 134 | struct lttng_kernel_probe_location_symbol *location; |
| 135 | |
| 136 | if (!symbol_name || strlen(symbol_name) >= LTTNG_SYMBOL_NAME_LEN) { |
| 137 | goto error; |
| 138 | } |
| 139 | |
| 140 | symbol_name_copy = strdup(symbol_name); |
| 141 | if (!symbol_name_copy) { |
| 142 | PERROR("Failed to copy symbol name '%s'", symbol_name); |
| 143 | goto error; |
| 144 | } |
| 145 | |
| 146 | location = zmalloc(sizeof(*location)); |
| 147 | if (!location) { |
| 148 | PERROR("Failed to allocate kernel symbol probe location"); |
| 149 | goto error; |
| 150 | } |
| 151 | |
| 152 | location->symbol_name = symbol_name_copy; |
| 153 | location->offset = offset; |
| 154 | |
| 155 | ret = &location->parent; |
| 156 | ret->type = LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET; |
| 157 | ret->equal = lttng_kernel_probe_location_symbol_is_equal; |
| 158 | ret->serialize = lttng_kernel_probe_location_symbol_serialize; |
| 159 | ret->hash = lttng_kernel_probe_location_symbol_hash; |
| 160 | goto end; |
| 161 | |
| 162 | error: |
| 163 | free(symbol_name_copy); |
| 164 | end: |
| 165 | return ret; |
| 166 | } |
| 167 | |
| 168 | enum lttng_kernel_probe_location_status |
| 169 | lttng_kernel_probe_location_address_get_address( |
| 170 | const struct lttng_kernel_probe_location *location, |
| 171 | uint64_t *offset) |
| 172 | { |
| 173 | enum lttng_kernel_probe_location_status ret = |
| 174 | LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK; |
| 175 | struct lttng_kernel_probe_location_address *address_location; |
| 176 | |
| 177 | assert(offset); |
| 178 | |
| 179 | if (!location || lttng_kernel_probe_location_get_type(location) != |
| 180 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS) { |
| 181 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 182 | ret = LTTNG_KERNEL_PROBE_LOCATION_STATUS_INVALID; |
| 183 | goto end; |
| 184 | } |
| 185 | |
| 186 | address_location = container_of(location, |
| 187 | struct lttng_kernel_probe_location_address, parent); |
| 188 | *offset = address_location->address; |
| 189 | end: |
| 190 | return ret; |
| 191 | } |
| 192 | |
| 193 | const char *lttng_kernel_probe_location_symbol_get_name( |
| 194 | const struct lttng_kernel_probe_location *location) |
| 195 | { |
| 196 | const char *ret = NULL; |
| 197 | struct lttng_kernel_probe_location_symbol *symbol_location; |
| 198 | |
| 199 | if (!location || lttng_kernel_probe_location_get_type(location) != |
| 200 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET) { |
| 201 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 202 | goto end; |
| 203 | } |
| 204 | |
| 205 | symbol_location = container_of(location, |
| 206 | struct lttng_kernel_probe_location_symbol, parent); |
| 207 | ret = symbol_location->symbol_name; |
| 208 | end: |
| 209 | return ret; |
| 210 | } |
| 211 | |
| 212 | enum lttng_kernel_probe_location_status |
| 213 | lttng_kernel_probe_location_symbol_get_offset( |
| 214 | const struct lttng_kernel_probe_location *location, |
| 215 | uint64_t *offset) |
| 216 | { |
| 217 | enum lttng_kernel_probe_location_status ret = |
| 218 | LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK; |
| 219 | struct lttng_kernel_probe_location_symbol *symbol_location; |
| 220 | |
| 221 | assert(offset); |
| 222 | |
| 223 | if (!location || lttng_kernel_probe_location_get_type(location) != |
| 224 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET) { |
| 225 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 226 | ret = LTTNG_KERNEL_PROBE_LOCATION_STATUS_INVALID; |
| 227 | goto end; |
| 228 | } |
| 229 | |
| 230 | symbol_location = container_of(location, |
| 231 | struct lttng_kernel_probe_location_symbol, parent); |
| 232 | *offset = symbol_location->offset; |
| 233 | end: |
| 234 | return ret; |
| 235 | } |
| 236 | |
| 237 | static |
| 238 | int lttng_kernel_probe_location_symbol_serialize( |
| 239 | const struct lttng_kernel_probe_location *location, |
| 240 | struct lttng_payload *payload) |
| 241 | { |
| 242 | int ret; |
| 243 | size_t symbol_name_len; |
| 244 | size_t original_payload_size; |
| 245 | struct lttng_kernel_probe_location_symbol *location_symbol; |
| 246 | struct lttng_kernel_probe_location_symbol_comm location_symbol_comm; |
| 247 | |
| 248 | if (!location || !payload) { |
| 249 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 250 | ret = -LTTNG_ERR_INVALID; |
| 251 | goto end; |
| 252 | } |
| 253 | |
| 254 | assert(lttng_kernel_probe_location_get_type(location) == |
| 255 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET); |
| 256 | |
| 257 | original_payload_size = payload->buffer.size; |
| 258 | location_symbol = container_of(location, |
| 259 | struct lttng_kernel_probe_location_symbol, parent); |
| 260 | |
| 261 | if (!location_symbol->symbol_name) { |
| 262 | ret = -LTTNG_ERR_INVALID; |
| 263 | goto end; |
| 264 | } |
| 265 | |
| 266 | symbol_name_len = strlen(location_symbol->symbol_name); |
| 267 | if (symbol_name_len == 0) { |
| 268 | ret = -LTTNG_ERR_INVALID; |
| 269 | goto end; |
| 270 | } |
| 271 | |
| 272 | location_symbol_comm.symbol_len = symbol_name_len + 1; |
| 273 | location_symbol_comm.offset = location_symbol->offset; |
| 274 | |
| 275 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 276 | &location_symbol_comm, sizeof(location_symbol_comm)); |
| 277 | if (ret) { |
| 278 | ret = -LTTNG_ERR_INVALID; |
| 279 | goto end; |
| 280 | } |
| 281 | |
| 282 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 283 | location_symbol->symbol_name, |
| 284 | location_symbol_comm.symbol_len); |
| 285 | if (ret) { |
| 286 | ret = -LTTNG_ERR_INVALID; |
| 287 | goto end; |
| 288 | } |
| 289 | |
| 290 | ret = (int) (payload->buffer.size - original_payload_size); |
| 291 | end: |
| 292 | return ret; |
| 293 | } |
| 294 | |
| 295 | static |
| 296 | int lttng_kernel_probe_location_address_serialize( |
| 297 | const struct lttng_kernel_probe_location *location, |
| 298 | struct lttng_payload *payload) |
| 299 | { |
| 300 | int ret; |
| 301 | size_t original_payload_size; |
| 302 | struct lttng_kernel_probe_location_address *location_address; |
| 303 | struct lttng_kernel_probe_location_address_comm location_address_comm; |
| 304 | |
| 305 | assert(location); |
| 306 | assert(lttng_kernel_probe_location_get_type(location) == |
| 307 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS); |
| 308 | |
| 309 | original_payload_size = payload->buffer.size; |
| 310 | location_address = container_of(location, |
| 311 | struct lttng_kernel_probe_location_address, |
| 312 | parent); |
| 313 | |
| 314 | location_address_comm.address = location_address->address; |
| 315 | |
| 316 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 317 | &location_address_comm, |
| 318 | sizeof(location_address_comm)); |
| 319 | if (ret) { |
| 320 | ret = -LTTNG_ERR_INVALID; |
| 321 | goto end; |
| 322 | } |
| 323 | |
| 324 | ret = (int) (payload->buffer.size - original_payload_size); |
| 325 | end: |
| 326 | return ret; |
| 327 | } |
| 328 | |
| 329 | LTTNG_HIDDEN |
| 330 | int lttng_kernel_probe_location_serialize( |
| 331 | const struct lttng_kernel_probe_location *location, |
| 332 | struct lttng_payload *payload) |
| 333 | { |
| 334 | int ret; |
| 335 | size_t original_payload_size; |
| 336 | struct lttng_kernel_probe_location_comm location_generic_comm = {}; |
| 337 | |
| 338 | if (!location || !payload) { |
| 339 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 340 | ret = -LTTNG_ERR_INVALID; |
| 341 | goto end; |
| 342 | } |
| 343 | |
| 344 | original_payload_size = payload->buffer.size; |
| 345 | location_generic_comm.type = (int8_t) location->type; |
| 346 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 347 | &location_generic_comm, |
| 348 | sizeof(location_generic_comm)); |
| 349 | if (ret) { |
| 350 | goto end; |
| 351 | } |
| 352 | |
| 353 | ret = location->serialize(location, payload); |
| 354 | if (ret < 0) { |
| 355 | goto end; |
| 356 | } |
| 357 | |
| 358 | ret = (int) (payload->buffer.size - original_payload_size); |
| 359 | end: |
| 360 | return ret; |
| 361 | } |
| 362 | |
| 363 | static |
| 364 | int lttng_kernel_probe_location_symbol_create_from_payload( |
| 365 | struct lttng_payload_view *view, |
| 366 | struct lttng_kernel_probe_location **location) |
| 367 | { |
| 368 | struct lttng_kernel_probe_location_symbol_comm *location_symbol_comm; |
| 369 | const char *symbol_name_src; |
| 370 | ssize_t ret = 0; |
| 371 | size_t expected_size; |
| 372 | |
| 373 | assert(location); |
| 374 | |
| 375 | if (view->buffer.size < sizeof(*location_symbol_comm)) { |
| 376 | ret = -LTTNG_ERR_INVALID; |
| 377 | goto end; |
| 378 | } |
| 379 | |
| 380 | location_symbol_comm = |
| 381 | (typeof(location_symbol_comm)) view->buffer.data; |
| 382 | |
| 383 | expected_size = sizeof(*location_symbol_comm) + |
| 384 | location_symbol_comm->symbol_len; |
| 385 | |
| 386 | if (view->buffer.size < expected_size) { |
| 387 | ret = -LTTNG_ERR_INVALID; |
| 388 | goto end; |
| 389 | } |
| 390 | |
| 391 | symbol_name_src = view->buffer.data + sizeof(*location_symbol_comm); |
| 392 | |
| 393 | if (!lttng_buffer_view_contains_string(&view->buffer, symbol_name_src, |
| 394 | location_symbol_comm->symbol_len)) { |
| 395 | ret = -LTTNG_ERR_INVALID; |
| 396 | goto end; |
| 397 | } |
| 398 | |
| 399 | *location = lttng_kernel_probe_location_symbol_create( |
| 400 | symbol_name_src, location_symbol_comm->offset); |
| 401 | if (!(*location)) { |
| 402 | ret = -LTTNG_ERR_INVALID; |
| 403 | goto end; |
| 404 | } |
| 405 | |
| 406 | ret = (ssize_t) expected_size; |
| 407 | end: |
| 408 | return ret; |
| 409 | } |
| 410 | |
| 411 | static |
| 412 | ssize_t lttng_kernel_probe_location_address_create_from_payload( |
| 413 | struct lttng_payload_view *view, |
| 414 | struct lttng_kernel_probe_location **location) |
| 415 | { |
| 416 | struct lttng_kernel_probe_location_address_comm *location_address_comm; |
| 417 | ssize_t ret = 0; |
| 418 | size_t expected_size; |
| 419 | |
| 420 | assert(location); |
| 421 | |
| 422 | expected_size = sizeof(*location_address_comm); |
| 423 | |
| 424 | if (view->buffer.size < expected_size) { |
| 425 | ret = -LTTNG_ERR_INVALID; |
| 426 | goto end; |
| 427 | } |
| 428 | |
| 429 | location_address_comm = |
| 430 | (typeof(location_address_comm)) view->buffer.data; |
| 431 | |
| 432 | *location = lttng_kernel_probe_location_address_create(location_address_comm->address); |
| 433 | if (!(*location)) { |
| 434 | ret = -LTTNG_ERR_INVALID; |
| 435 | goto end; |
| 436 | } |
| 437 | |
| 438 | ret = (size_t) expected_size; |
| 439 | end: |
| 440 | return ret; |
| 441 | } |
| 442 | |
| 443 | LTTNG_HIDDEN |
| 444 | ssize_t lttng_kernel_probe_location_create_from_payload( |
| 445 | struct lttng_payload_view *view, |
| 446 | struct lttng_kernel_probe_location **location) |
| 447 | { |
| 448 | enum lttng_kernel_probe_location_type type; |
| 449 | ssize_t consumed = 0; |
| 450 | ssize_t ret; |
| 451 | const struct lttng_kernel_probe_location_comm *probe_location_comm; |
| 452 | const struct lttng_payload_view probe_location_comm_view = |
| 453 | lttng_payload_view_from_view( |
| 454 | view, 0, sizeof(*probe_location_comm)); |
| 455 | |
| 456 | assert(view); |
| 457 | assert(location); |
| 458 | |
| 459 | if (!lttng_payload_view_is_valid(&probe_location_comm_view)) { |
| 460 | ret = -LTTNG_ERR_INVALID; |
| 461 | goto end; |
| 462 | } |
| 463 | |
| 464 | probe_location_comm = (typeof(probe_location_comm)) probe_location_comm_view.buffer.data; |
| 465 | type = (enum lttng_kernel_probe_location_type) probe_location_comm->type; |
| 466 | consumed += sizeof(*probe_location_comm); |
| 467 | |
| 468 | switch (type) { |
| 469 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: |
| 470 | { |
| 471 | struct lttng_payload_view location_view = |
| 472 | lttng_payload_view_from_view( |
| 473 | view, consumed, -1); |
| 474 | |
| 475 | ret = lttng_kernel_probe_location_symbol_create_from_payload( |
| 476 | &location_view, location); |
| 477 | break; |
| 478 | } |
| 479 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: |
| 480 | { |
| 481 | struct lttng_payload_view location_view = |
| 482 | lttng_payload_view_from_view(view, consumed, -1); |
| 483 | |
| 484 | ret = lttng_kernel_probe_location_address_create_from_payload( |
| 485 | &location_view, location); |
| 486 | break; |
| 487 | } |
| 488 | default: |
| 489 | ret = -LTTNG_ERR_INVALID; |
| 490 | break; |
| 491 | } |
| 492 | |
| 493 | if (ret < 0) { |
| 494 | ret = -LTTNG_ERR_INVALID; |
| 495 | goto end; |
| 496 | } |
| 497 | |
| 498 | ret += consumed; |
| 499 | |
| 500 | end: |
| 501 | return ret; |
| 502 | } |
| 503 | |
| 504 | static |
| 505 | unsigned long lttng_kernel_probe_location_address_hash( |
| 506 | const struct lttng_kernel_probe_location *location) |
| 507 | { |
| 508 | unsigned long hash = hash_key_ulong( |
| 509 | (void *) LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS, |
| 510 | lttng_ht_seed); |
| 511 | struct lttng_kernel_probe_location_address *address_location = |
| 512 | container_of(location, typeof(*address_location), |
| 513 | parent); |
| 514 | |
| 515 | hash ^= hash_key_u64(&address_location->address, lttng_ht_seed); |
| 516 | |
| 517 | return hash; |
| 518 | } |
| 519 | |
| 520 | static |
| 521 | bool lttng_kernel_probe_location_address_is_equal( |
| 522 | const struct lttng_kernel_probe_location *_a, |
| 523 | const struct lttng_kernel_probe_location *_b) |
| 524 | { |
| 525 | bool is_equal = false; |
| 526 | struct lttng_kernel_probe_location_address *a, *b; |
| 527 | |
| 528 | a = container_of(_a, struct lttng_kernel_probe_location_address, |
| 529 | parent); |
| 530 | b = container_of(_b, struct lttng_kernel_probe_location_address, |
| 531 | parent); |
| 532 | |
| 533 | if (a->address != b->address) { |
| 534 | goto end; |
| 535 | } |
| 536 | |
| 537 | is_equal = true; |
| 538 | |
| 539 | end: |
| 540 | return is_equal; |
| 541 | } |
| 542 | |
| 543 | static |
| 544 | unsigned long lttng_kernel_probe_location_symbol_hash( |
| 545 | const struct lttng_kernel_probe_location *location) |
| 546 | { |
| 547 | unsigned long hash = hash_key_ulong( |
| 548 | (void *) LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET, |
| 549 | lttng_ht_seed); |
| 550 | struct lttng_kernel_probe_location_symbol *symbol_location = |
| 551 | container_of(location, typeof(*symbol_location), |
| 552 | parent); |
| 553 | |
| 554 | hash ^= hash_key_str(symbol_location->symbol_name, lttng_ht_seed); |
| 555 | hash ^= hash_key_u64(&symbol_location->offset, lttng_ht_seed); |
| 556 | |
| 557 | return hash; |
| 558 | } |
| 559 | |
| 560 | static |
| 561 | bool lttng_kernel_probe_location_symbol_is_equal( |
| 562 | const struct lttng_kernel_probe_location *_a, |
| 563 | const struct lttng_kernel_probe_location *_b) |
| 564 | { |
| 565 | bool is_equal = false; |
| 566 | struct lttng_kernel_probe_location_symbol *a, *b; |
| 567 | |
| 568 | a = container_of(_a, struct lttng_kernel_probe_location_symbol, |
| 569 | parent); |
| 570 | b = container_of(_b, struct lttng_kernel_probe_location_symbol, |
| 571 | parent); |
| 572 | |
| 573 | assert(a->symbol_name); |
| 574 | assert(b->symbol_name); |
| 575 | if (strcmp(a->symbol_name, b->symbol_name)) { |
| 576 | goto end; |
| 577 | } |
| 578 | |
| 579 | if (a->offset != b->offset) { |
| 580 | goto end; |
| 581 | } |
| 582 | |
| 583 | is_equal = true; |
| 584 | |
| 585 | end: |
| 586 | return is_equal; |
| 587 | } |
| 588 | |
| 589 | LTTNG_HIDDEN |
| 590 | bool lttng_kernel_probe_location_is_equal( |
| 591 | const struct lttng_kernel_probe_location *a, |
| 592 | const struct lttng_kernel_probe_location *b) |
| 593 | { |
| 594 | bool is_equal = false; |
| 595 | |
| 596 | if (!a || !b) { |
| 597 | goto end; |
| 598 | } |
| 599 | |
| 600 | if (a == b) { |
| 601 | is_equal = true; |
| 602 | goto end; |
| 603 | } |
| 604 | |
| 605 | if (a->type != b->type) { |
| 606 | goto end; |
| 607 | } |
| 608 | |
| 609 | is_equal = a->equal ? a->equal(a, b) : true; |
| 610 | end: |
| 611 | return is_equal; |
| 612 | } |
| 613 | |
| 614 | static struct lttng_kernel_probe_location * |
| 615 | lttng_kernel_probe_location_symbol_copy( |
| 616 | const struct lttng_kernel_probe_location *location) |
| 617 | { |
| 618 | struct lttng_kernel_probe_location *new_location = NULL; |
| 619 | struct lttng_kernel_probe_location_symbol *symbol_location; |
| 620 | enum lttng_kernel_probe_location_status status; |
| 621 | const char *symbol_name = NULL; |
| 622 | uint64_t offset; |
| 623 | |
| 624 | assert(location); |
| 625 | assert(location->type == LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET); |
| 626 | symbol_location = container_of( |
| 627 | location, typeof(*symbol_location), parent); |
| 628 | |
| 629 | /* Get probe location offset */ |
| 630 | status = lttng_kernel_probe_location_symbol_get_offset(location, &offset); |
| 631 | if (status != LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK) { |
| 632 | ERR("Get kernel probe location offset failed."); |
| 633 | goto error; |
| 634 | } |
| 635 | |
| 636 | symbol_name = lttng_kernel_probe_location_symbol_get_name(location); |
| 637 | if (!symbol_name) { |
| 638 | ERR("Kernel probe symbol name is NULL."); |
| 639 | goto error; |
| 640 | } |
| 641 | |
| 642 | /* Create the probe_location */ |
| 643 | new_location = lttng_kernel_probe_location_symbol_create( |
| 644 | symbol_name, offset); |
| 645 | |
| 646 | goto end; |
| 647 | |
| 648 | error: |
| 649 | new_location = NULL; |
| 650 | end: |
| 651 | return new_location; |
| 652 | } |
| 653 | static struct lttng_kernel_probe_location * |
| 654 | lttng_kernel_probe_location_address_copy( |
| 655 | const struct lttng_kernel_probe_location *location) |
| 656 | { |
| 657 | struct lttng_kernel_probe_location *new_location = NULL; |
| 658 | struct lttng_kernel_probe_location_address *address_location; |
| 659 | enum lttng_kernel_probe_location_status status; |
| 660 | uint64_t address; |
| 661 | |
| 662 | assert(location); |
| 663 | assert(location->type == LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS); |
| 664 | address_location = container_of( |
| 665 | location, typeof(*address_location), parent); |
| 666 | |
| 667 | |
| 668 | /* Get probe location fields */ |
| 669 | status = lttng_kernel_probe_location_address_get_address(location, &address); |
| 670 | if (status != LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK) { |
| 671 | ERR("Get kernel probe address failed."); |
| 672 | goto error; |
| 673 | } |
| 674 | |
| 675 | /* Create the probe_location */ |
| 676 | new_location = lttng_kernel_probe_location_address_create(address); |
| 677 | |
| 678 | goto end; |
| 679 | |
| 680 | error: |
| 681 | new_location = NULL; |
| 682 | end: |
| 683 | return new_location; |
| 684 | } |
| 685 | |
| 686 | LTTNG_HIDDEN |
| 687 | struct lttng_kernel_probe_location *lttng_kernel_probe_location_copy( |
| 688 | const struct lttng_kernel_probe_location *location) |
| 689 | { |
| 690 | struct lttng_kernel_probe_location *new_location = NULL; |
| 691 | enum lttng_kernel_probe_location_type type; |
| 692 | |
| 693 | if (!location) { |
| 694 | goto err; |
| 695 | } |
| 696 | |
| 697 | type = lttng_kernel_probe_location_get_type(location); |
| 698 | switch (type) { |
| 699 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: |
| 700 | new_location = |
| 701 | lttng_kernel_probe_location_address_copy(location); |
| 702 | if (!new_location) { |
| 703 | goto err; |
| 704 | } |
| 705 | break; |
| 706 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: |
| 707 | new_location = |
| 708 | lttng_kernel_probe_location_symbol_copy(location); |
| 709 | if (!new_location) { |
| 710 | goto err; |
| 711 | } |
| 712 | break; |
| 713 | default: |
| 714 | new_location = NULL; |
| 715 | goto err; |
| 716 | } |
| 717 | err: |
| 718 | return new_location; |
| 719 | } |
| 720 | |
| 721 | LTTNG_HIDDEN |
| 722 | unsigned long lttng_kernel_probe_location_hash( |
| 723 | const struct lttng_kernel_probe_location *location) |
| 724 | { |
| 725 | return location->hash(location); |
| 726 | } |