| 1 | /* |
| 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@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/compat/string.h> |
| 11 | #include <common/error.h> |
| 12 | #include <common/macros.h> |
| 13 | #include <common/payload.h> |
| 14 | #include <common/payload-view.h> |
| 15 | #include <common/hashtable/hashtable.h> |
| 16 | #include <common/hashtable/utils.h> |
| 17 | #include <fcntl.h> |
| 18 | #include <lttng/constant.h> |
| 19 | #include <lttng/userspace-probe-internal.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <sys/types.h> |
| 22 | #include <sys/unistd.h> |
| 23 | |
| 24 | static |
| 25 | int lttng_userspace_probe_location_function_set_binary_fd_handle( |
| 26 | struct lttng_userspace_probe_location *location, |
| 27 | struct fd_handle *binary_fd_handle); |
| 28 | |
| 29 | static |
| 30 | int lttng_userspace_probe_location_tracepoint_set_binary_fd_handle( |
| 31 | struct lttng_userspace_probe_location *location, |
| 32 | struct fd_handle *binary_fd_handle); |
| 33 | |
| 34 | enum lttng_userspace_probe_location_lookup_method_type |
| 35 | lttng_userspace_probe_location_lookup_method_get_type( |
| 36 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 37 | { |
| 38 | return lookup_method ? lookup_method->type : |
| 39 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_UNKNOWN; |
| 40 | } |
| 41 | |
| 42 | void lttng_userspace_probe_location_lookup_method_destroy( |
| 43 | struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 44 | { |
| 45 | if (!lookup_method){ |
| 46 | return; |
| 47 | } |
| 48 | |
| 49 | free(lookup_method); |
| 50 | } |
| 51 | |
| 52 | struct lttng_userspace_probe_location_lookup_method * |
| 53 | lttng_userspace_probe_location_lookup_method_function_elf_create(void) |
| 54 | { |
| 55 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 56 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; |
| 57 | |
| 58 | elf_method = zmalloc(sizeof(*elf_method)); |
| 59 | if (!elf_method) { |
| 60 | PERROR("zmalloc"); |
| 61 | goto end; |
| 62 | } |
| 63 | |
| 64 | ret = &elf_method->parent; |
| 65 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; |
| 66 | end: |
| 67 | return ret; |
| 68 | } |
| 69 | |
| 70 | struct lttng_userspace_probe_location_lookup_method * |
| 71 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(void) |
| 72 | { |
| 73 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 74 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; |
| 75 | |
| 76 | sdt_method = zmalloc(sizeof(*sdt_method)); |
| 77 | if (!sdt_method) { |
| 78 | PERROR("zmalloc"); |
| 79 | goto end; |
| 80 | } |
| 81 | |
| 82 | ret = &sdt_method->parent; |
| 83 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; |
| 84 | end: |
| 85 | return ret; |
| 86 | } |
| 87 | |
| 88 | enum lttng_userspace_probe_location_type lttng_userspace_probe_location_get_type( |
| 89 | const struct lttng_userspace_probe_location *location) |
| 90 | { |
| 91 | return location ? location->type : |
| 92 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN; |
| 93 | } |
| 94 | |
| 95 | static |
| 96 | void lttng_userspace_probe_location_function_destroy( |
| 97 | struct lttng_userspace_probe_location *location) |
| 98 | { |
| 99 | struct lttng_userspace_probe_location_function *location_function = NULL; |
| 100 | |
| 101 | assert(location); |
| 102 | |
| 103 | location_function = container_of(location, |
| 104 | struct lttng_userspace_probe_location_function, parent); |
| 105 | |
| 106 | assert(location_function); |
| 107 | |
| 108 | free(location_function->function_name); |
| 109 | free(location_function->binary_path); |
| 110 | fd_handle_put(location_function->binary_fd_handle); |
| 111 | free(location); |
| 112 | } |
| 113 | |
| 114 | static |
| 115 | void lttng_userspace_probe_location_tracepoint_destroy( |
| 116 | struct lttng_userspace_probe_location *location) |
| 117 | { |
| 118 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint = NULL; |
| 119 | |
| 120 | assert(location); |
| 121 | |
| 122 | location_tracepoint = container_of(location, |
| 123 | struct lttng_userspace_probe_location_tracepoint, |
| 124 | parent); |
| 125 | |
| 126 | assert(location_tracepoint); |
| 127 | |
| 128 | free(location_tracepoint->probe_name); |
| 129 | free(location_tracepoint->provider_name); |
| 130 | free(location_tracepoint->binary_path); |
| 131 | fd_handle_put(location_tracepoint->binary_fd_handle); |
| 132 | free(location); |
| 133 | } |
| 134 | |
| 135 | void lttng_userspace_probe_location_destroy( |
| 136 | struct lttng_userspace_probe_location *location) |
| 137 | { |
| 138 | if (!location) { |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | lttng_userspace_probe_location_lookup_method_destroy( |
| 143 | location->lookup_method); |
| 144 | |
| 145 | switch (location->type) { |
| 146 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 147 | lttng_userspace_probe_location_function_destroy(location); |
| 148 | break; |
| 149 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 150 | lttng_userspace_probe_location_tracepoint_destroy(location); |
| 151 | break; |
| 152 | default: |
| 153 | abort(); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | /* Compare two file descriptors based on their inode and device numbers. */ |
| 158 | static bool fd_is_equal(int a, int b) |
| 159 | { |
| 160 | int ret; |
| 161 | bool is_equal = false; |
| 162 | struct stat a_stat, b_stat; |
| 163 | |
| 164 | if (a < 0 && b >= 0) { |
| 165 | goto end; |
| 166 | } |
| 167 | |
| 168 | if (b < 0 && a >= 0) { |
| 169 | goto end; |
| 170 | } |
| 171 | |
| 172 | if (a < 0 && b < 0) { |
| 173 | if (a == -1 && b == -1) { |
| 174 | is_equal = true; |
| 175 | goto end; |
| 176 | } |
| 177 | |
| 178 | /* Invalid state, abort. */ |
| 179 | abort(); |
| 180 | } |
| 181 | |
| 182 | /* Both are valid file descriptors. */ |
| 183 | ret = fstat(a, &a_stat); |
| 184 | if (ret) { |
| 185 | PERROR("Failed to fstat userspace probe location binary fd %d", |
| 186 | a); |
| 187 | goto end; |
| 188 | } |
| 189 | |
| 190 | ret = fstat(b, &b_stat); |
| 191 | if (ret) { |
| 192 | PERROR("Failed to fstat userspace probe location binary fd %d", |
| 193 | b); |
| 194 | goto end; |
| 195 | } |
| 196 | |
| 197 | is_equal = (a_stat.st_ino == b_stat.st_ino) && |
| 198 | (a_stat.st_dev == b_stat.st_dev); |
| 199 | |
| 200 | end: |
| 201 | return is_equal; |
| 202 | } |
| 203 | |
| 204 | static unsigned long lttng_userspace_probe_location_function_hash( |
| 205 | const struct lttng_userspace_probe_location *location) |
| 206 | { |
| 207 | unsigned long hash = hash_key_ulong( |
| 208 | (void *) LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION, |
| 209 | lttng_ht_seed); |
| 210 | struct lttng_userspace_probe_location_function *function_location = |
| 211 | container_of(location, typeof(*function_location), |
| 212 | parent); |
| 213 | |
| 214 | hash ^= hash_key_str(function_location->function_name, lttng_ht_seed); |
| 215 | hash ^= hash_key_str(function_location->binary_path, lttng_ht_seed); |
| 216 | /* |
| 217 | * No need to hash on the fd. Worst comes to worse, |
| 218 | * the equal function will discriminate. |
| 219 | */ |
| 220 | return hash; |
| 221 | } |
| 222 | |
| 223 | static bool lttng_userspace_probe_location_function_is_equal( |
| 224 | const struct lttng_userspace_probe_location *_a, |
| 225 | const struct lttng_userspace_probe_location *_b) |
| 226 | { |
| 227 | bool is_equal = false; |
| 228 | struct lttng_userspace_probe_location_function *a, *b; |
| 229 | |
| 230 | a = container_of(_a, struct lttng_userspace_probe_location_function, |
| 231 | parent); |
| 232 | b = container_of(_b, struct lttng_userspace_probe_location_function, |
| 233 | parent); |
| 234 | |
| 235 | if (a->instrumentation_type != b->instrumentation_type) { |
| 236 | goto end; |
| 237 | } |
| 238 | |
| 239 | assert(a->function_name); |
| 240 | assert(b->function_name); |
| 241 | if (strcmp(a->function_name, b->function_name)) { |
| 242 | goto end; |
| 243 | } |
| 244 | |
| 245 | assert(a->binary_path); |
| 246 | assert(b->binary_path); |
| 247 | if (strcmp(a->binary_path, b->binary_path)) { |
| 248 | goto end; |
| 249 | } |
| 250 | |
| 251 | is_equal = fd_is_equal(a->binary_fd_handle ? fd_handle_get_fd(a->binary_fd_handle) : -1, |
| 252 | b->binary_fd_handle ? fd_handle_get_fd(b->binary_fd_handle) : -1); |
| 253 | end: |
| 254 | return is_equal; |
| 255 | } |
| 256 | |
| 257 | static struct lttng_userspace_probe_location * |
| 258 | lttng_userspace_probe_location_function_create_no_check(const char *binary_path, |
| 259 | const char *function_name, |
| 260 | struct lttng_userspace_probe_location_lookup_method *lookup_method, |
| 261 | bool open_binary) |
| 262 | { |
| 263 | int binary_fd = -1; |
| 264 | struct fd_handle *binary_fd_handle = NULL; |
| 265 | char *function_name_copy = NULL, *binary_path_copy = NULL; |
| 266 | struct lttng_userspace_probe_location *ret = NULL; |
| 267 | struct lttng_userspace_probe_location_function *location; |
| 268 | |
| 269 | if (open_binary) { |
| 270 | binary_fd = open(binary_path, O_RDONLY); |
| 271 | if (binary_fd < 0) { |
| 272 | PERROR("Error opening the binary"); |
| 273 | goto error; |
| 274 | } |
| 275 | |
| 276 | binary_fd_handle = fd_handle_create(binary_fd); |
| 277 | if (!binary_fd) { |
| 278 | goto error; |
| 279 | } |
| 280 | |
| 281 | /* Ownership transferred to fd_handle. */ |
| 282 | binary_fd = -1; |
| 283 | } |
| 284 | |
| 285 | function_name_copy = lttng_strndup(function_name, LTTNG_SYMBOL_NAME_LEN); |
| 286 | if (!function_name_copy) { |
| 287 | PERROR("Error duplicating the function name"); |
| 288 | goto error; |
| 289 | } |
| 290 | |
| 291 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); |
| 292 | if (!binary_path_copy) { |
| 293 | PERROR("Error duplicating the function name"); |
| 294 | goto error; |
| 295 | } |
| 296 | |
| 297 | location = zmalloc(sizeof(*location)); |
| 298 | if (!location) { |
| 299 | PERROR("Error allocating userspace probe location"); |
| 300 | goto error; |
| 301 | } |
| 302 | |
| 303 | location->function_name = function_name_copy; |
| 304 | location->binary_path = binary_path_copy; |
| 305 | location->binary_fd_handle = binary_fd_handle; |
| 306 | binary_fd_handle = NULL; |
| 307 | location->instrumentation_type = |
| 308 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY; |
| 309 | |
| 310 | ret = &location->parent; |
| 311 | ret->lookup_method = lookup_method; |
| 312 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION; |
| 313 | ret->equal = lttng_userspace_probe_location_function_is_equal; |
| 314 | ret->hash = lttng_userspace_probe_location_function_hash; |
| 315 | goto end; |
| 316 | |
| 317 | error: |
| 318 | free(function_name_copy); |
| 319 | free(binary_path_copy); |
| 320 | if (binary_fd >= 0) { |
| 321 | if (close(binary_fd)) { |
| 322 | PERROR("Error closing binary fd in error path"); |
| 323 | } |
| 324 | } |
| 325 | fd_handle_put(binary_fd_handle); |
| 326 | end: |
| 327 | return ret; |
| 328 | } |
| 329 | |
| 330 | static unsigned long lttng_userspace_probe_location_tracepoint_hash( |
| 331 | const struct lttng_userspace_probe_location *location) |
| 332 | { |
| 333 | unsigned long hash = hash_key_ulong( |
| 334 | (void *) LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT, |
| 335 | lttng_ht_seed); |
| 336 | struct lttng_userspace_probe_location_tracepoint *tp_location = |
| 337 | container_of(location, typeof(*tp_location), parent); |
| 338 | |
| 339 | hash ^= hash_key_str(tp_location->probe_name, lttng_ht_seed); |
| 340 | hash ^= hash_key_str(tp_location->provider_name, lttng_ht_seed); |
| 341 | hash ^= hash_key_str(tp_location->binary_path, lttng_ht_seed); |
| 342 | /* |
| 343 | * No need to hash on the fd. Worst comes to worse, |
| 344 | * the equal function will discriminate. |
| 345 | */ |
| 346 | return hash; |
| 347 | } |
| 348 | |
| 349 | static bool lttng_userspace_probe_location_tracepoint_is_equal( |
| 350 | const struct lttng_userspace_probe_location *_a, |
| 351 | const struct lttng_userspace_probe_location *_b) |
| 352 | { |
| 353 | bool is_equal = false; |
| 354 | struct lttng_userspace_probe_location_tracepoint *a, *b; |
| 355 | |
| 356 | a = container_of(_a, struct lttng_userspace_probe_location_tracepoint, |
| 357 | parent); |
| 358 | b = container_of(_b, struct lttng_userspace_probe_location_tracepoint, |
| 359 | parent); |
| 360 | |
| 361 | assert(a->probe_name); |
| 362 | assert(b->probe_name); |
| 363 | if (strcmp(a->probe_name, b->probe_name)) { |
| 364 | goto end; |
| 365 | } |
| 366 | |
| 367 | assert(a->provider_name); |
| 368 | assert(b->provider_name); |
| 369 | if (strcmp(a->provider_name, b->provider_name)) { |
| 370 | goto end; |
| 371 | } |
| 372 | |
| 373 | assert(a->binary_path); |
| 374 | assert(b->binary_path); |
| 375 | if (strcmp(a->binary_path, b->binary_path)) { |
| 376 | goto end; |
| 377 | } |
| 378 | |
| 379 | is_equal = fd_is_equal(a->binary_fd_handle ? fd_handle_get_fd(a->binary_fd_handle) : -1, |
| 380 | b->binary_fd_handle ? fd_handle_get_fd(b->binary_fd_handle) : -1); |
| 381 | |
| 382 | end: |
| 383 | return is_equal; |
| 384 | } |
| 385 | |
| 386 | static struct lttng_userspace_probe_location * |
| 387 | lttng_userspace_probe_location_tracepoint_create_no_check(const char *binary_path, |
| 388 | const char *provider_name, const char *probe_name, |
| 389 | struct lttng_userspace_probe_location_lookup_method *lookup_method, |
| 390 | bool open_binary) |
| 391 | { |
| 392 | int binary_fd = -1; |
| 393 | struct fd_handle *binary_fd_handle = NULL; |
| 394 | char *probe_name_copy = NULL; |
| 395 | char *provider_name_copy = NULL; |
| 396 | char *binary_path_copy = NULL; |
| 397 | struct lttng_userspace_probe_location *ret = NULL; |
| 398 | struct lttng_userspace_probe_location_tracepoint *location; |
| 399 | |
| 400 | if (open_binary) { |
| 401 | binary_fd = open(binary_path, O_RDONLY); |
| 402 | if (binary_fd < 0) { |
| 403 | PERROR("open"); |
| 404 | goto error; |
| 405 | } |
| 406 | |
| 407 | binary_fd_handle = fd_handle_create(binary_fd); |
| 408 | if (!binary_fd) { |
| 409 | goto error; |
| 410 | } |
| 411 | |
| 412 | /* Ownership transferred to fd_handle. */ |
| 413 | binary_fd = -1; |
| 414 | } |
| 415 | |
| 416 | probe_name_copy = lttng_strndup(probe_name, LTTNG_SYMBOL_NAME_LEN); |
| 417 | if (!probe_name_copy) { |
| 418 | PERROR("lttng_strndup"); |
| 419 | goto error; |
| 420 | } |
| 421 | |
| 422 | provider_name_copy = lttng_strndup(provider_name, LTTNG_SYMBOL_NAME_LEN); |
| 423 | if (!provider_name_copy) { |
| 424 | PERROR("lttng_strndup"); |
| 425 | goto error; |
| 426 | } |
| 427 | |
| 428 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); |
| 429 | if (!binary_path_copy) { |
| 430 | PERROR("lttng_strndup"); |
| 431 | goto error; |
| 432 | } |
| 433 | |
| 434 | location = zmalloc(sizeof(*location)); |
| 435 | if (!location) { |
| 436 | PERROR("zmalloc"); |
| 437 | goto error; |
| 438 | } |
| 439 | |
| 440 | location->probe_name = probe_name_copy; |
| 441 | location->provider_name = provider_name_copy; |
| 442 | location->binary_path = binary_path_copy; |
| 443 | location->binary_fd_handle = binary_fd_handle; |
| 444 | binary_fd_handle = NULL; |
| 445 | |
| 446 | ret = &location->parent; |
| 447 | ret->lookup_method = lookup_method; |
| 448 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT; |
| 449 | ret->equal = lttng_userspace_probe_location_tracepoint_is_equal; |
| 450 | ret->hash = lttng_userspace_probe_location_tracepoint_hash; |
| 451 | goto end; |
| 452 | |
| 453 | error: |
| 454 | free(probe_name_copy); |
| 455 | free(provider_name_copy); |
| 456 | free(binary_path_copy); |
| 457 | if (binary_fd >= 0) { |
| 458 | if (close(binary_fd)) { |
| 459 | PERROR("Error closing binary fd in error path"); |
| 460 | } |
| 461 | } |
| 462 | fd_handle_put(binary_fd_handle); |
| 463 | end: |
| 464 | return ret; |
| 465 | } |
| 466 | |
| 467 | struct lttng_userspace_probe_location * |
| 468 | lttng_userspace_probe_location_function_create(const char *binary_path, |
| 469 | const char *function_name, |
| 470 | struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 471 | { |
| 472 | struct lttng_userspace_probe_location *ret = NULL; |
| 473 | |
| 474 | if (!binary_path || !function_name) { |
| 475 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 476 | goto end; |
| 477 | } |
| 478 | |
| 479 | switch (lttng_userspace_probe_location_lookup_method_get_type( |
| 480 | lookup_method)) { |
| 481 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: |
| 482 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: |
| 483 | break; |
| 484 | default: |
| 485 | /* Invalid probe location lookup method. */ |
| 486 | goto end; |
| 487 | } |
| 488 | |
| 489 | ret = lttng_userspace_probe_location_function_create_no_check( |
| 490 | binary_path, function_name, lookup_method, true); |
| 491 | end: |
| 492 | return ret; |
| 493 | } |
| 494 | |
| 495 | struct lttng_userspace_probe_location * |
| 496 | lttng_userspace_probe_location_tracepoint_create(const char *binary_path, |
| 497 | const char *provider_name, const char *probe_name, |
| 498 | struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 499 | { |
| 500 | struct lttng_userspace_probe_location *ret = NULL; |
| 501 | |
| 502 | if (!binary_path || !probe_name || !provider_name) { |
| 503 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 504 | goto end; |
| 505 | } |
| 506 | |
| 507 | switch (lttng_userspace_probe_location_lookup_method_get_type( |
| 508 | lookup_method)) { |
| 509 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
| 510 | break; |
| 511 | default: |
| 512 | /* Invalid probe location lookup method. */ |
| 513 | goto end; |
| 514 | } |
| 515 | |
| 516 | ret = lttng_userspace_probe_location_tracepoint_create_no_check( |
| 517 | binary_path, provider_name, probe_name, lookup_method, true); |
| 518 | end: |
| 519 | return ret; |
| 520 | } |
| 521 | |
| 522 | static struct lttng_userspace_probe_location_lookup_method * |
| 523 | lttng_userspace_probe_location_lookup_method_function_elf_copy( |
| 524 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 525 | { |
| 526 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; |
| 527 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; |
| 528 | |
| 529 | assert(lookup_method); |
| 530 | assert(lookup_method->type == |
| 531 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF); |
| 532 | |
| 533 | elf_method = zmalloc(sizeof(*elf_method)); |
| 534 | if (!elf_method) { |
| 535 | PERROR("Error allocating ELF userspace probe lookup method"); |
| 536 | goto error; |
| 537 | } |
| 538 | |
| 539 | elf_method->parent.type = lookup_method->type; |
| 540 | parent = &elf_method->parent; |
| 541 | |
| 542 | goto end; |
| 543 | error: |
| 544 | parent = NULL; |
| 545 | end: |
| 546 | return parent; |
| 547 | } |
| 548 | |
| 549 | static struct lttng_userspace_probe_location_lookup_method * |
| 550 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( |
| 551 | struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 552 | { |
| 553 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; |
| 554 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; |
| 555 | |
| 556 | assert(lookup_method); |
| 557 | assert(lookup_method->type == |
| 558 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT); |
| 559 | |
| 560 | sdt_method = zmalloc(sizeof(*sdt_method)); |
| 561 | if (!sdt_method) { |
| 562 | PERROR("zmalloc"); |
| 563 | goto error; |
| 564 | } |
| 565 | |
| 566 | sdt_method->parent.type = lookup_method->type; |
| 567 | parent = &sdt_method->parent; |
| 568 | |
| 569 | goto end; |
| 570 | |
| 571 | error: |
| 572 | parent = NULL; |
| 573 | end: |
| 574 | return parent; |
| 575 | } |
| 576 | |
| 577 | static struct lttng_userspace_probe_location * |
| 578 | lttng_userspace_probe_location_function_copy( |
| 579 | const struct lttng_userspace_probe_location *location) |
| 580 | { |
| 581 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
| 582 | struct lttng_userspace_probe_location *new_location = NULL; |
| 583 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; |
| 584 | const char *binary_path = NULL; |
| 585 | const char *function_name = NULL; |
| 586 | struct lttng_userspace_probe_location_function *function_location; |
| 587 | |
| 588 | assert(location); |
| 589 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); |
| 590 | function_location = container_of( |
| 591 | location, typeof(*function_location), parent); |
| 592 | |
| 593 | /* Get probe location fields */ |
| 594 | binary_path = lttng_userspace_probe_location_function_get_binary_path(location); |
| 595 | if (!binary_path) { |
| 596 | ERR("Userspace probe binary path is NULL"); |
| 597 | goto error; |
| 598 | } |
| 599 | |
| 600 | function_name = lttng_userspace_probe_location_function_get_function_name(location); |
| 601 | if (!function_name) { |
| 602 | ERR("Userspace probe function name is NULL"); |
| 603 | goto error; |
| 604 | } |
| 605 | |
| 606 | /* |
| 607 | * Duplicate probe location method fields |
| 608 | */ |
| 609 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( |
| 610 | location->lookup_method); |
| 611 | switch (lookup_type) { |
| 612 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: |
| 613 | lookup_method = |
| 614 | lttng_userspace_probe_location_lookup_method_function_elf_copy( |
| 615 | location->lookup_method); |
| 616 | if (!lookup_method) { |
| 617 | goto error; |
| 618 | } |
| 619 | break; |
| 620 | default: |
| 621 | /* Invalid probe location lookup method. */ |
| 622 | goto error; |
| 623 | } |
| 624 | |
| 625 | /* Create the probe_location */ |
| 626 | new_location = lttng_userspace_probe_location_function_create_no_check( |
| 627 | binary_path, function_name, lookup_method, false); |
| 628 | if (!new_location) { |
| 629 | goto destroy_lookup_method; |
| 630 | } |
| 631 | |
| 632 | /* Set the duplicated fd to the new probe_location */ |
| 633 | if (lttng_userspace_probe_location_function_set_binary_fd_handle(new_location, |
| 634 | function_location->binary_fd_handle) < 0) { |
| 635 | goto destroy_probe_location; |
| 636 | } |
| 637 | |
| 638 | goto end; |
| 639 | |
| 640 | destroy_probe_location: |
| 641 | lttng_userspace_probe_location_destroy(new_location); |
| 642 | destroy_lookup_method: |
| 643 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); |
| 644 | error: |
| 645 | new_location = NULL; |
| 646 | end: |
| 647 | return new_location; |
| 648 | } |
| 649 | |
| 650 | static struct lttng_userspace_probe_location * |
| 651 | lttng_userspace_probe_location_tracepoint_copy( |
| 652 | const struct lttng_userspace_probe_location *location) |
| 653 | { |
| 654 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
| 655 | struct lttng_userspace_probe_location *new_location = NULL; |
| 656 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; |
| 657 | const char *binary_path = NULL; |
| 658 | const char *probe_name = NULL; |
| 659 | const char *provider_name = NULL; |
| 660 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 661 | |
| 662 | assert(location); |
| 663 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
| 664 | tracepoint_location = container_of( |
| 665 | location, typeof(*tracepoint_location), parent); |
| 666 | |
| 667 | /* Get probe location fields */ |
| 668 | binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location); |
| 669 | if (!binary_path) { |
| 670 | ERR("Userspace probe binary path is NULL"); |
| 671 | goto error; |
| 672 | } |
| 673 | |
| 674 | probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location); |
| 675 | if (!probe_name) { |
| 676 | ERR("Userspace probe probe name is NULL"); |
| 677 | goto error; |
| 678 | } |
| 679 | |
| 680 | provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location); |
| 681 | if (!provider_name) { |
| 682 | ERR("Userspace probe provider name is NULL"); |
| 683 | goto error; |
| 684 | } |
| 685 | |
| 686 | /* |
| 687 | * Duplicate probe location method fields |
| 688 | */ |
| 689 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( |
| 690 | location->lookup_method); |
| 691 | switch (lookup_type) { |
| 692 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
| 693 | lookup_method = |
| 694 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( |
| 695 | location->lookup_method); |
| 696 | if (!lookup_method) { |
| 697 | goto error; |
| 698 | } |
| 699 | break; |
| 700 | default: |
| 701 | /* Invalid probe location lookup method. */ |
| 702 | goto error; |
| 703 | } |
| 704 | |
| 705 | /* Create the probe_location */ |
| 706 | new_location = lttng_userspace_probe_location_tracepoint_create_no_check( |
| 707 | binary_path, provider_name, probe_name, lookup_method, false); |
| 708 | if (!new_location) { |
| 709 | goto destroy_lookup_method; |
| 710 | } |
| 711 | |
| 712 | /* Set the duplicated fd to the new probe_location */ |
| 713 | if (lttng_userspace_probe_location_tracepoint_set_binary_fd_handle(new_location, |
| 714 | tracepoint_location->binary_fd_handle) < 0) { |
| 715 | goto destroy_probe_location; |
| 716 | } |
| 717 | |
| 718 | goto end; |
| 719 | |
| 720 | destroy_probe_location: |
| 721 | lttng_userspace_probe_location_destroy(new_location); |
| 722 | destroy_lookup_method: |
| 723 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); |
| 724 | error: |
| 725 | new_location = NULL; |
| 726 | end: |
| 727 | return new_location; |
| 728 | } |
| 729 | |
| 730 | const char *lttng_userspace_probe_location_function_get_binary_path( |
| 731 | const struct lttng_userspace_probe_location *location) |
| 732 | { |
| 733 | const char *ret = NULL; |
| 734 | struct lttng_userspace_probe_location_function *function_location; |
| 735 | |
| 736 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 737 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 738 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 739 | goto end; |
| 740 | } |
| 741 | |
| 742 | function_location = container_of(location, |
| 743 | struct lttng_userspace_probe_location_function, |
| 744 | parent); |
| 745 | ret = function_location->binary_path; |
| 746 | end: |
| 747 | return ret; |
| 748 | } |
| 749 | |
| 750 | const char *lttng_userspace_probe_location_tracepoint_get_binary_path( |
| 751 | const struct lttng_userspace_probe_location *location) |
| 752 | { |
| 753 | const char *ret = NULL; |
| 754 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 755 | |
| 756 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 757 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 758 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 759 | goto end; |
| 760 | } |
| 761 | |
| 762 | tracepoint_location = container_of(location, |
| 763 | struct lttng_userspace_probe_location_tracepoint, |
| 764 | parent); |
| 765 | ret = tracepoint_location->binary_path; |
| 766 | end: |
| 767 | return ret; |
| 768 | } |
| 769 | |
| 770 | const char *lttng_userspace_probe_location_function_get_function_name( |
| 771 | const struct lttng_userspace_probe_location *location) |
| 772 | { |
| 773 | const char *ret = NULL; |
| 774 | struct lttng_userspace_probe_location_function *function_location; |
| 775 | |
| 776 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 777 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 778 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 779 | goto end; |
| 780 | } |
| 781 | |
| 782 | function_location = container_of(location, |
| 783 | struct lttng_userspace_probe_location_function, parent); |
| 784 | ret = function_location->function_name; |
| 785 | end: |
| 786 | return ret; |
| 787 | } |
| 788 | |
| 789 | const char *lttng_userspace_probe_location_tracepoint_get_probe_name( |
| 790 | const struct lttng_userspace_probe_location *location) |
| 791 | { |
| 792 | const char *ret = NULL; |
| 793 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 794 | |
| 795 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 796 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 797 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 798 | goto end; |
| 799 | } |
| 800 | |
| 801 | tracepoint_location = container_of(location, |
| 802 | struct lttng_userspace_probe_location_tracepoint, parent); |
| 803 | ret = tracepoint_location->probe_name; |
| 804 | end: |
| 805 | return ret; |
| 806 | } |
| 807 | |
| 808 | const char *lttng_userspace_probe_location_tracepoint_get_provider_name( |
| 809 | const struct lttng_userspace_probe_location *location) |
| 810 | { |
| 811 | const char *ret = NULL; |
| 812 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 813 | |
| 814 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 815 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 816 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 817 | goto end; |
| 818 | } |
| 819 | |
| 820 | tracepoint_location = container_of(location, |
| 821 | struct lttng_userspace_probe_location_tracepoint, parent); |
| 822 | ret = tracepoint_location->provider_name; |
| 823 | end: |
| 824 | return ret; |
| 825 | } |
| 826 | |
| 827 | int lttng_userspace_probe_location_function_get_binary_fd( |
| 828 | const struct lttng_userspace_probe_location *location) |
| 829 | { |
| 830 | int ret = -1; |
| 831 | struct lttng_userspace_probe_location_function *function_location; |
| 832 | |
| 833 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 834 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 835 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 836 | goto end; |
| 837 | } |
| 838 | |
| 839 | function_location = container_of(location, |
| 840 | struct lttng_userspace_probe_location_function, parent); |
| 841 | ret = function_location->binary_fd_handle ? |
| 842 | fd_handle_get_fd(function_location->binary_fd_handle) : -1; |
| 843 | end: |
| 844 | return ret; |
| 845 | } |
| 846 | |
| 847 | enum lttng_userspace_probe_location_function_instrumentation_type |
| 848 | lttng_userspace_probe_location_function_get_instrumentation_type( |
| 849 | const struct lttng_userspace_probe_location *location) |
| 850 | { |
| 851 | enum lttng_userspace_probe_location_function_instrumentation_type type; |
| 852 | struct lttng_userspace_probe_location_function *function_location; |
| 853 | |
| 854 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 855 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 856 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 857 | type = LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_UNKNOWN; |
| 858 | goto end; |
| 859 | } |
| 860 | |
| 861 | function_location = container_of(location, |
| 862 | struct lttng_userspace_probe_location_function, parent); |
| 863 | type = function_location->instrumentation_type; |
| 864 | end: |
| 865 | return type; |
| 866 | } |
| 867 | |
| 868 | enum lttng_userspace_probe_location_status |
| 869 | lttng_userspace_probe_location_function_set_instrumentation_type( |
| 870 | const struct lttng_userspace_probe_location *location, |
| 871 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type) |
| 872 | { |
| 873 | enum lttng_userspace_probe_location_status status = |
| 874 | LTTNG_USERSPACE_PROBE_LOCATION_STATUS_OK; |
| 875 | struct lttng_userspace_probe_location_function *function_location; |
| 876 | |
| 877 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 878 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION || |
| 879 | instrumentation_type != |
| 880 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY) { |
| 881 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 882 | status = LTTNG_USERSPACE_PROBE_LOCATION_STATUS_INVALID; |
| 883 | goto end; |
| 884 | } |
| 885 | |
| 886 | function_location = container_of(location, |
| 887 | struct lttng_userspace_probe_location_function, parent); |
| 888 | function_location->instrumentation_type = instrumentation_type; |
| 889 | end: |
| 890 | return status; |
| 891 | } |
| 892 | |
| 893 | int lttng_userspace_probe_location_tracepoint_get_binary_fd( |
| 894 | const struct lttng_userspace_probe_location *location) |
| 895 | { |
| 896 | int ret = -1; |
| 897 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 898 | |
| 899 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 900 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 901 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 902 | goto end; |
| 903 | } |
| 904 | |
| 905 | tracepoint_location = container_of(location, |
| 906 | struct lttng_userspace_probe_location_tracepoint, parent); |
| 907 | ret = tracepoint_location->binary_fd_handle ? |
| 908 | fd_handle_get_fd(tracepoint_location->binary_fd_handle) : -1; |
| 909 | end: |
| 910 | return ret; |
| 911 | } |
| 912 | |
| 913 | static struct lttng_userspace_probe_location_lookup_method * |
| 914 | lttng_userspace_probe_location_function_get_lookup_method( |
| 915 | const struct lttng_userspace_probe_location *location) |
| 916 | { |
| 917 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 918 | |
| 919 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 920 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 921 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 922 | goto end; |
| 923 | } |
| 924 | |
| 925 | ret = location->lookup_method; |
| 926 | end: |
| 927 | return ret; |
| 928 | } |
| 929 | |
| 930 | static struct lttng_userspace_probe_location_lookup_method * |
| 931 | lttng_userspace_probe_location_tracepoint_get_lookup_method( |
| 932 | const struct lttng_userspace_probe_location *location) |
| 933 | { |
| 934 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 935 | |
| 936 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 937 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 938 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 939 | goto end; |
| 940 | } |
| 941 | |
| 942 | ret = location->lookup_method; |
| 943 | end: |
| 944 | return ret; |
| 945 | } |
| 946 | |
| 947 | const struct lttng_userspace_probe_location_lookup_method * |
| 948 | lttng_userspace_probe_location_get_lookup_method( |
| 949 | const struct lttng_userspace_probe_location *location) |
| 950 | { |
| 951 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 952 | |
| 953 | assert(location); |
| 954 | switch (location->type) { |
| 955 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 956 | ret = lttng_userspace_probe_location_function_get_lookup_method( |
| 957 | location); |
| 958 | break; |
| 959 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 960 | ret = lttng_userspace_probe_location_tracepoint_get_lookup_method( |
| 961 | location); |
| 962 | break; |
| 963 | default: |
| 964 | ERR("Unknowned lookup method."); |
| 965 | break; |
| 966 | } |
| 967 | return ret; |
| 968 | } |
| 969 | |
| 970 | static |
| 971 | int lttng_userspace_probe_location_lookup_method_serialize( |
| 972 | struct lttng_userspace_probe_location_lookup_method *method, |
| 973 | struct lttng_payload *payload) |
| 974 | { |
| 975 | int ret; |
| 976 | struct lttng_userspace_probe_location_lookup_method_comm |
| 977 | lookup_method_comm; |
| 978 | |
| 979 | lookup_method_comm.type = (int8_t) (method ? method->type : |
| 980 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT); |
| 981 | if (payload) { |
| 982 | ret = lttng_dynamic_buffer_append(&payload->buffer, &lookup_method_comm, |
| 983 | sizeof(lookup_method_comm)); |
| 984 | if (ret) { |
| 985 | goto end; |
| 986 | } |
| 987 | } |
| 988 | ret = sizeof(lookup_method_comm); |
| 989 | end: |
| 990 | return ret; |
| 991 | } |
| 992 | |
| 993 | static |
| 994 | int lttng_userspace_probe_location_function_serialize( |
| 995 | const struct lttng_userspace_probe_location *location, |
| 996 | struct lttng_payload *payload) |
| 997 | { |
| 998 | int ret; |
| 999 | size_t function_name_len, binary_path_len; |
| 1000 | struct lttng_userspace_probe_location_function *location_function; |
| 1001 | struct lttng_userspace_probe_location_function_comm location_function_comm; |
| 1002 | |
| 1003 | assert(location); |
| 1004 | assert(lttng_userspace_probe_location_get_type(location) == |
| 1005 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); |
| 1006 | |
| 1007 | location_function = container_of(location, |
| 1008 | struct lttng_userspace_probe_location_function, |
| 1009 | parent); |
| 1010 | if (!location_function->function_name || !location_function->binary_path) { |
| 1011 | ret = -LTTNG_ERR_INVALID; |
| 1012 | goto end; |
| 1013 | } |
| 1014 | |
| 1015 | if (payload && !location_function->binary_fd_handle) { |
| 1016 | ret = -LTTNG_ERR_INVALID; |
| 1017 | goto end; |
| 1018 | } |
| 1019 | |
| 1020 | function_name_len = strlen(location_function->function_name); |
| 1021 | if (function_name_len == 0) { |
| 1022 | ret = -LTTNG_ERR_INVALID; |
| 1023 | goto end; |
| 1024 | } |
| 1025 | binary_path_len = strlen(location_function->binary_path); |
| 1026 | if (binary_path_len == 0) { |
| 1027 | ret = -LTTNG_ERR_INVALID; |
| 1028 | goto end; |
| 1029 | } |
| 1030 | |
| 1031 | location_function_comm.function_name_len = function_name_len + 1; |
| 1032 | location_function_comm.binary_path_len = binary_path_len + 1; |
| 1033 | |
| 1034 | if (payload) { |
| 1035 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 1036 | &location_function_comm, |
| 1037 | sizeof(location_function_comm)); |
| 1038 | if (ret) { |
| 1039 | ret = -LTTNG_ERR_INVALID; |
| 1040 | goto end; |
| 1041 | } |
| 1042 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 1043 | location_function->function_name, |
| 1044 | location_function_comm.function_name_len); |
| 1045 | if (ret) { |
| 1046 | ret = -LTTNG_ERR_INVALID; |
| 1047 | goto end; |
| 1048 | } |
| 1049 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 1050 | location_function->binary_path, |
| 1051 | location_function_comm.binary_path_len); |
| 1052 | if (ret) { |
| 1053 | ret = -LTTNG_ERR_INVALID; |
| 1054 | goto end; |
| 1055 | } |
| 1056 | ret = lttng_payload_push_fd_handle( |
| 1057 | payload, location_function->binary_fd_handle); |
| 1058 | if (ret) { |
| 1059 | ret = -LTTNG_ERR_INVALID; |
| 1060 | goto end; |
| 1061 | } |
| 1062 | } |
| 1063 | ret = sizeof(location_function_comm) + |
| 1064 | location_function_comm.function_name_len + |
| 1065 | location_function_comm.binary_path_len; |
| 1066 | end: |
| 1067 | return ret; |
| 1068 | } |
| 1069 | |
| 1070 | static |
| 1071 | int lttng_userspace_probe_location_tracepoint_serialize( |
| 1072 | const struct lttng_userspace_probe_location *location, |
| 1073 | struct lttng_payload *payload) |
| 1074 | { |
| 1075 | int ret; |
| 1076 | size_t probe_name_len, provider_name_len, binary_path_len; |
| 1077 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint; |
| 1078 | struct lttng_userspace_probe_location_tracepoint_comm location_tracepoint_comm; |
| 1079 | |
| 1080 | assert(location); |
| 1081 | assert(lttng_userspace_probe_location_get_type(location) == |
| 1082 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
| 1083 | |
| 1084 | location_tracepoint = container_of(location, |
| 1085 | struct lttng_userspace_probe_location_tracepoint, |
| 1086 | parent); |
| 1087 | if (!location_tracepoint->probe_name || |
| 1088 | !location_tracepoint->provider_name || |
| 1089 | !location_tracepoint->binary_path) { |
| 1090 | ret = -LTTNG_ERR_INVALID; |
| 1091 | goto end; |
| 1092 | } |
| 1093 | |
| 1094 | if (payload && !location_tracepoint->binary_fd_handle) { |
| 1095 | ret = -LTTNG_ERR_INVALID; |
| 1096 | goto end; |
| 1097 | } |
| 1098 | |
| 1099 | probe_name_len = strlen(location_tracepoint->probe_name); |
| 1100 | if (probe_name_len == 0) { |
| 1101 | ret = -LTTNG_ERR_INVALID; |
| 1102 | goto end; |
| 1103 | } |
| 1104 | |
| 1105 | provider_name_len = strlen(location_tracepoint->provider_name); |
| 1106 | if (provider_name_len == 0) { |
| 1107 | ret = -LTTNG_ERR_INVALID; |
| 1108 | goto end; |
| 1109 | } |
| 1110 | |
| 1111 | binary_path_len = strlen(location_tracepoint->binary_path); |
| 1112 | if (binary_path_len == 0) { |
| 1113 | ret = -LTTNG_ERR_INVALID; |
| 1114 | goto end; |
| 1115 | } |
| 1116 | |
| 1117 | location_tracepoint_comm.probe_name_len = probe_name_len + 1; |
| 1118 | location_tracepoint_comm.provider_name_len = provider_name_len + 1; |
| 1119 | location_tracepoint_comm.binary_path_len = binary_path_len + 1; |
| 1120 | |
| 1121 | if (payload) { |
| 1122 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 1123 | &location_tracepoint_comm, |
| 1124 | sizeof(location_tracepoint_comm)); |
| 1125 | if (ret) { |
| 1126 | ret = -LTTNG_ERR_INVALID; |
| 1127 | goto end; |
| 1128 | } |
| 1129 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 1130 | location_tracepoint->probe_name, |
| 1131 | location_tracepoint_comm.probe_name_len); |
| 1132 | if (ret) { |
| 1133 | ret = -LTTNG_ERR_INVALID; |
| 1134 | goto end; |
| 1135 | } |
| 1136 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 1137 | location_tracepoint->provider_name, |
| 1138 | location_tracepoint_comm.provider_name_len); |
| 1139 | if (ret) { |
| 1140 | ret = -LTTNG_ERR_INVALID; |
| 1141 | goto end; |
| 1142 | } |
| 1143 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 1144 | location_tracepoint->binary_path, |
| 1145 | location_tracepoint_comm.binary_path_len); |
| 1146 | if (ret) { |
| 1147 | ret = -LTTNG_ERR_INVALID; |
| 1148 | goto end; |
| 1149 | } |
| 1150 | ret = lttng_payload_push_fd_handle( |
| 1151 | payload, location_tracepoint->binary_fd_handle); |
| 1152 | if (ret) { |
| 1153 | ret = -LTTNG_ERR_INVALID; |
| 1154 | goto end; |
| 1155 | } |
| 1156 | } |
| 1157 | |
| 1158 | ret = sizeof(location_tracepoint_comm) + |
| 1159 | location_tracepoint_comm.probe_name_len + |
| 1160 | location_tracepoint_comm.provider_name_len + |
| 1161 | location_tracepoint_comm.binary_path_len; |
| 1162 | end: |
| 1163 | return ret; |
| 1164 | } |
| 1165 | |
| 1166 | LTTNG_HIDDEN |
| 1167 | int lttng_userspace_probe_location_serialize( |
| 1168 | const struct lttng_userspace_probe_location *location, |
| 1169 | struct lttng_payload *payload) |
| 1170 | { |
| 1171 | int ret, buffer_use = 0; |
| 1172 | struct lttng_userspace_probe_location_comm location_generic_comm; |
| 1173 | |
| 1174 | if (!location) { |
| 1175 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); |
| 1176 | ret = -LTTNG_ERR_INVALID; |
| 1177 | goto end; |
| 1178 | } |
| 1179 | |
| 1180 | memset(&location_generic_comm, 0, sizeof(location_generic_comm)); |
| 1181 | |
| 1182 | location_generic_comm.type = (int8_t) location->type; |
| 1183 | if (payload) { |
| 1184 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
| 1185 | &location_generic_comm, |
| 1186 | sizeof(location_generic_comm)); |
| 1187 | if (ret) { |
| 1188 | goto end; |
| 1189 | } |
| 1190 | } |
| 1191 | buffer_use += sizeof(location_generic_comm); |
| 1192 | |
| 1193 | switch (lttng_userspace_probe_location_get_type(location)) { |
| 1194 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 1195 | ret = lttng_userspace_probe_location_function_serialize( |
| 1196 | location, payload); |
| 1197 | break; |
| 1198 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 1199 | ret = lttng_userspace_probe_location_tracepoint_serialize( |
| 1200 | location, payload); |
| 1201 | break; |
| 1202 | default: |
| 1203 | ERR("Unsupported probe location type"); |
| 1204 | ret = -LTTNG_ERR_INVALID; |
| 1205 | goto end; |
| 1206 | } |
| 1207 | if (ret < 0) { |
| 1208 | goto end; |
| 1209 | } |
| 1210 | buffer_use += ret; |
| 1211 | |
| 1212 | ret = lttng_userspace_probe_location_lookup_method_serialize( |
| 1213 | location->lookup_method, payload); |
| 1214 | if (ret < 0) { |
| 1215 | goto end; |
| 1216 | } |
| 1217 | ret += buffer_use; |
| 1218 | end: |
| 1219 | return ret; |
| 1220 | } |
| 1221 | |
| 1222 | static |
| 1223 | int lttng_userspace_probe_location_function_create_from_payload( |
| 1224 | struct lttng_payload_view *view, |
| 1225 | struct lttng_userspace_probe_location **location) |
| 1226 | { |
| 1227 | struct lttng_userspace_probe_location_function_comm *location_function_comm; |
| 1228 | const char *function_name_src, *binary_path_src; |
| 1229 | char *function_name = NULL, *binary_path = NULL; |
| 1230 | int ret = 0; |
| 1231 | size_t expected_size; |
| 1232 | struct fd_handle *binary_fd_handle = lttng_payload_view_pop_fd_handle(view); |
| 1233 | |
| 1234 | assert(location); |
| 1235 | |
| 1236 | if (view->buffer.size < sizeof(*location_function_comm)) { |
| 1237 | ret = -LTTNG_ERR_INVALID; |
| 1238 | goto end; |
| 1239 | } |
| 1240 | |
| 1241 | location_function_comm = |
| 1242 | (typeof(location_function_comm)) view->buffer.data; |
| 1243 | |
| 1244 | expected_size = sizeof(*location_function_comm) + |
| 1245 | location_function_comm->function_name_len + |
| 1246 | location_function_comm->binary_path_len; |
| 1247 | |
| 1248 | if (view->buffer.size < expected_size) { |
| 1249 | ret = -LTTNG_ERR_INVALID; |
| 1250 | goto end; |
| 1251 | } |
| 1252 | |
| 1253 | function_name_src = view->buffer.data + sizeof(*location_function_comm); |
| 1254 | binary_path_src = function_name_src + |
| 1255 | location_function_comm->function_name_len; |
| 1256 | |
| 1257 | if (!lttng_buffer_view_contains_string(&view->buffer, function_name_src, |
| 1258 | location_function_comm->function_name_len)) { |
| 1259 | ret = -LTTNG_ERR_INVALID; |
| 1260 | goto end; |
| 1261 | } |
| 1262 | |
| 1263 | if (!lttng_buffer_view_contains_string(&view->buffer, binary_path_src, |
| 1264 | location_function_comm->binary_path_len)) { |
| 1265 | ret = -LTTNG_ERR_INVALID; |
| 1266 | goto end; |
| 1267 | } |
| 1268 | |
| 1269 | function_name = lttng_strndup(function_name_src, LTTNG_SYMBOL_NAME_LEN); |
| 1270 | if (!function_name) { |
| 1271 | PERROR("lttng_strndup"); |
| 1272 | ret = -LTTNG_ERR_NOMEM; |
| 1273 | goto end; |
| 1274 | } |
| 1275 | |
| 1276 | binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX); |
| 1277 | if (!binary_path) { |
| 1278 | PERROR("lttng_strndup"); |
| 1279 | ret = -LTTNG_ERR_NOMEM; |
| 1280 | goto end; |
| 1281 | } |
| 1282 | |
| 1283 | *location = lttng_userspace_probe_location_function_create_no_check( |
| 1284 | binary_path, function_name, NULL, false); |
| 1285 | if (!(*location)) { |
| 1286 | ret = -LTTNG_ERR_INVALID; |
| 1287 | goto end; |
| 1288 | } |
| 1289 | |
| 1290 | ret = lttng_userspace_probe_location_function_set_binary_fd_handle( |
| 1291 | *location, binary_fd_handle); |
| 1292 | if (ret) { |
| 1293 | ret = -LTTNG_ERR_INVALID; |
| 1294 | goto end; |
| 1295 | } |
| 1296 | |
| 1297 | ret = (int) expected_size; |
| 1298 | end: |
| 1299 | fd_handle_put(binary_fd_handle); |
| 1300 | free(function_name); |
| 1301 | free(binary_path); |
| 1302 | return ret; |
| 1303 | } |
| 1304 | |
| 1305 | static |
| 1306 | int lttng_userspace_probe_location_tracepoint_create_from_payload( |
| 1307 | struct lttng_payload_view *view, |
| 1308 | struct lttng_userspace_probe_location **location) |
| 1309 | { |
| 1310 | struct lttng_userspace_probe_location_tracepoint_comm *location_tracepoint_comm; |
| 1311 | const char *probe_name_src, *provider_name_src, *binary_path_src; |
| 1312 | char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; |
| 1313 | int ret = 0; |
| 1314 | size_t expected_size; |
| 1315 | struct fd_handle *binary_fd_handle = lttng_payload_view_pop_fd_handle(view); |
| 1316 | |
| 1317 | assert(location); |
| 1318 | |
| 1319 | if (!binary_fd_handle) { |
| 1320 | ret = -LTTNG_ERR_INVALID; |
| 1321 | goto end; |
| 1322 | } |
| 1323 | |
| 1324 | if (view->buffer.size < sizeof(*location_tracepoint_comm)) { |
| 1325 | ret = -LTTNG_ERR_INVALID; |
| 1326 | goto end; |
| 1327 | } |
| 1328 | |
| 1329 | location_tracepoint_comm = |
| 1330 | (typeof(location_tracepoint_comm)) view->buffer.data; |
| 1331 | |
| 1332 | expected_size = sizeof(*location_tracepoint_comm) + |
| 1333 | location_tracepoint_comm->probe_name_len + |
| 1334 | location_tracepoint_comm->provider_name_len + |
| 1335 | location_tracepoint_comm->binary_path_len; |
| 1336 | |
| 1337 | if (view->buffer.size < expected_size) { |
| 1338 | ret = -LTTNG_ERR_INVALID; |
| 1339 | goto end; |
| 1340 | } |
| 1341 | |
| 1342 | probe_name_src = view->buffer.data + sizeof(*location_tracepoint_comm); |
| 1343 | provider_name_src = probe_name_src + |
| 1344 | location_tracepoint_comm->probe_name_len; |
| 1345 | binary_path_src = provider_name_src + |
| 1346 | location_tracepoint_comm->provider_name_len; |
| 1347 | |
| 1348 | if (!lttng_buffer_view_contains_string(&view->buffer, probe_name_src, |
| 1349 | location_tracepoint_comm->probe_name_len)) { |
| 1350 | ret = -LTTNG_ERR_INVALID; |
| 1351 | goto end; |
| 1352 | } |
| 1353 | |
| 1354 | if (!lttng_buffer_view_contains_string(&view->buffer, provider_name_src, |
| 1355 | location_tracepoint_comm->provider_name_len)) { |
| 1356 | ret = -LTTNG_ERR_INVALID; |
| 1357 | goto end; |
| 1358 | } |
| 1359 | |
| 1360 | if (!lttng_buffer_view_contains_string(&view->buffer, binary_path_src, |
| 1361 | location_tracepoint_comm->binary_path_len)) { |
| 1362 | ret = -LTTNG_ERR_INVALID; |
| 1363 | goto end; |
| 1364 | } |
| 1365 | |
| 1366 | probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN); |
| 1367 | if (!probe_name) { |
| 1368 | PERROR("lttng_strndup"); |
| 1369 | goto end; |
| 1370 | } |
| 1371 | provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN); |
| 1372 | if (!provider_name) { |
| 1373 | PERROR("lttng_strndup"); |
| 1374 | goto end; |
| 1375 | } |
| 1376 | |
| 1377 | binary_path = lttng_strndup(binary_path_src, LTTNG_SYMBOL_NAME_LEN); |
| 1378 | if (!binary_path) { |
| 1379 | PERROR("lttng_strndup"); |
| 1380 | goto end; |
| 1381 | } |
| 1382 | |
| 1383 | *location = lttng_userspace_probe_location_tracepoint_create_no_check( |
| 1384 | binary_path, provider_name, probe_name, NULL, false); |
| 1385 | if (!(*location)) { |
| 1386 | ret = -LTTNG_ERR_INVALID; |
| 1387 | goto end; |
| 1388 | } |
| 1389 | |
| 1390 | ret = lttng_userspace_probe_location_tracepoint_set_binary_fd_handle( |
| 1391 | *location, binary_fd_handle); |
| 1392 | if (ret) { |
| 1393 | ret = -LTTNG_ERR_INVALID; |
| 1394 | goto end; |
| 1395 | } |
| 1396 | |
| 1397 | ret = (int) expected_size; |
| 1398 | end: |
| 1399 | fd_handle_put(binary_fd_handle); |
| 1400 | free(probe_name); |
| 1401 | free(provider_name); |
| 1402 | free(binary_path); |
| 1403 | return ret; |
| 1404 | } |
| 1405 | |
| 1406 | static |
| 1407 | int lttng_userspace_probe_location_lookup_method_create_from_payload( |
| 1408 | struct lttng_payload_view *view, |
| 1409 | struct lttng_userspace_probe_location_lookup_method **lookup_method) |
| 1410 | { |
| 1411 | int ret; |
| 1412 | struct lttng_userspace_probe_location_lookup_method_comm *lookup_comm; |
| 1413 | enum lttng_userspace_probe_location_lookup_method_type type; |
| 1414 | |
| 1415 | assert(view); |
| 1416 | assert(lookup_method); |
| 1417 | |
| 1418 | if (view->buffer.size < sizeof(*lookup_comm)) { |
| 1419 | ret = -LTTNG_ERR_INVALID; |
| 1420 | goto end; |
| 1421 | } |
| 1422 | |
| 1423 | lookup_comm = (typeof(lookup_comm)) view->buffer.data; |
| 1424 | type = (enum lttng_userspace_probe_location_lookup_method_type) |
| 1425 | lookup_comm->type; |
| 1426 | switch (type) { |
| 1427 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: |
| 1428 | *lookup_method = NULL; |
| 1429 | break; |
| 1430 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: |
| 1431 | *lookup_method = |
| 1432 | lttng_userspace_probe_location_lookup_method_function_elf_create(); |
| 1433 | if (!(*lookup_method)) { |
| 1434 | ret = -LTTNG_ERR_INVALID; |
| 1435 | goto end; |
| 1436 | } |
| 1437 | break; |
| 1438 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
| 1439 | *lookup_method = |
| 1440 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); |
| 1441 | if (!(*lookup_method)) { |
| 1442 | ret = -LTTNG_ERR_INVALID; |
| 1443 | goto end; |
| 1444 | } |
| 1445 | break; |
| 1446 | default: |
| 1447 | ret = -LTTNG_ERR_INVALID; |
| 1448 | goto end; |
| 1449 | } |
| 1450 | |
| 1451 | ret = sizeof(*lookup_comm); |
| 1452 | end: |
| 1453 | return ret; |
| 1454 | } |
| 1455 | |
| 1456 | LTTNG_HIDDEN |
| 1457 | int lttng_userspace_probe_location_create_from_payload( |
| 1458 | struct lttng_payload_view *view, |
| 1459 | struct lttng_userspace_probe_location **location) |
| 1460 | { |
| 1461 | struct lttng_userspace_probe_location_lookup_method *lookup_method; |
| 1462 | enum lttng_userspace_probe_location_type type; |
| 1463 | int consumed = 0; |
| 1464 | int ret; |
| 1465 | struct lttng_userspace_probe_location_comm *probe_location_comm; |
| 1466 | struct lttng_payload_view probe_location_comm_view = |
| 1467 | lttng_payload_view_from_view( |
| 1468 | view, 0, sizeof(*probe_location_comm)); |
| 1469 | |
| 1470 | assert(view); |
| 1471 | assert(location); |
| 1472 | |
| 1473 | lookup_method = NULL; |
| 1474 | |
| 1475 | if (!lttng_payload_view_is_valid(&probe_location_comm_view)) { |
| 1476 | ret = -LTTNG_ERR_INVALID; |
| 1477 | goto end; |
| 1478 | } |
| 1479 | |
| 1480 | probe_location_comm = (typeof(probe_location_comm)) probe_location_comm_view.buffer.data; |
| 1481 | type = (enum lttng_userspace_probe_location_type) probe_location_comm->type; |
| 1482 | consumed += sizeof(*probe_location_comm); |
| 1483 | |
| 1484 | switch (type) { |
| 1485 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 1486 | { |
| 1487 | struct lttng_payload_view location_view = |
| 1488 | lttng_payload_view_from_view( |
| 1489 | view, consumed, -1); |
| 1490 | |
| 1491 | ret = lttng_userspace_probe_location_function_create_from_payload( |
| 1492 | &location_view, location); |
| 1493 | if (ret < 0) { |
| 1494 | goto end; |
| 1495 | } |
| 1496 | break; |
| 1497 | } |
| 1498 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 1499 | { |
| 1500 | struct lttng_payload_view location_view = |
| 1501 | lttng_payload_view_from_view(view, consumed, -1); |
| 1502 | |
| 1503 | ret = lttng_userspace_probe_location_tracepoint_create_from_payload( |
| 1504 | &location_view, location); |
| 1505 | if (ret < 0) { |
| 1506 | goto end; |
| 1507 | } |
| 1508 | break; |
| 1509 | } |
| 1510 | default: |
| 1511 | ret = -LTTNG_ERR_INVALID; |
| 1512 | goto end; |
| 1513 | } |
| 1514 | |
| 1515 | consumed += ret; |
| 1516 | if (view->buffer.size <= consumed) { |
| 1517 | ret = -LTTNG_ERR_INVALID; |
| 1518 | goto end; |
| 1519 | } |
| 1520 | |
| 1521 | { |
| 1522 | struct lttng_payload_view lookup_method_view = |
| 1523 | lttng_payload_view_from_view( |
| 1524 | view, consumed, -1); |
| 1525 | |
| 1526 | ret = lttng_userspace_probe_location_lookup_method_create_from_payload( |
| 1527 | &lookup_method_view, &lookup_method); |
| 1528 | } |
| 1529 | if (ret < 0) { |
| 1530 | ret = -LTTNG_ERR_INVALID; |
| 1531 | goto end; |
| 1532 | } |
| 1533 | |
| 1534 | assert(lookup_method); |
| 1535 | (*location)->lookup_method = lookup_method; |
| 1536 | lookup_method = NULL; |
| 1537 | ret += consumed; |
| 1538 | end: |
| 1539 | return ret; |
| 1540 | } |
| 1541 | |
| 1542 | static |
| 1543 | int lttng_userspace_probe_location_function_set_binary_fd_handle( |
| 1544 | struct lttng_userspace_probe_location *location, |
| 1545 | struct fd_handle *binary_fd) |
| 1546 | { |
| 1547 | int ret = 0; |
| 1548 | struct lttng_userspace_probe_location_function *function_location; |
| 1549 | |
| 1550 | assert(location); |
| 1551 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); |
| 1552 | |
| 1553 | function_location = container_of(location, |
| 1554 | struct lttng_userspace_probe_location_function, parent); |
| 1555 | fd_handle_put(function_location->binary_fd_handle); |
| 1556 | fd_handle_get(binary_fd); |
| 1557 | function_location->binary_fd_handle = binary_fd; |
| 1558 | return ret; |
| 1559 | } |
| 1560 | |
| 1561 | static |
| 1562 | int lttng_userspace_probe_location_tracepoint_set_binary_fd_handle( |
| 1563 | struct lttng_userspace_probe_location *location, |
| 1564 | struct fd_handle *binary_fd) |
| 1565 | { |
| 1566 | int ret = 0; |
| 1567 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 1568 | |
| 1569 | assert(location); |
| 1570 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
| 1571 | |
| 1572 | tracepoint_location = container_of(location, |
| 1573 | struct lttng_userspace_probe_location_tracepoint, parent); |
| 1574 | fd_handle_put(tracepoint_location->binary_fd_handle); |
| 1575 | fd_handle_get(binary_fd); |
| 1576 | tracepoint_location->binary_fd_handle = binary_fd; |
| 1577 | return ret; |
| 1578 | } |
| 1579 | |
| 1580 | static |
| 1581 | int lttng_userspace_probe_location_function_flatten( |
| 1582 | const struct lttng_userspace_probe_location *location, |
| 1583 | struct lttng_dynamic_buffer *buffer) |
| 1584 | { |
| 1585 | struct lttng_userspace_probe_location_lookup_method_elf flat_lookup_method; |
| 1586 | struct lttng_userspace_probe_location_function *probe_function; |
| 1587 | struct lttng_userspace_probe_location_function flat_probe; |
| 1588 | size_t function_name_len, binary_path_len; |
| 1589 | size_t padding_needed = 0; |
| 1590 | char *flat_probe_start; |
| 1591 | int storage_needed = 0; |
| 1592 | int ret; |
| 1593 | |
| 1594 | assert(location); |
| 1595 | |
| 1596 | if (location->lookup_method && location->lookup_method->type != |
| 1597 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF) { |
| 1598 | ret = -LTTNG_ERR_INVALID; |
| 1599 | goto end; |
| 1600 | } |
| 1601 | |
| 1602 | probe_function = container_of(location, |
| 1603 | struct lttng_userspace_probe_location_function, |
| 1604 | parent); |
| 1605 | assert(probe_function->function_name); |
| 1606 | assert(probe_function->binary_path); |
| 1607 | |
| 1608 | storage_needed += |
| 1609 | sizeof(struct lttng_userspace_probe_location_function); |
| 1610 | function_name_len = strlen(probe_function->function_name) + 1; |
| 1611 | binary_path_len = strlen(probe_function->binary_path) + 1; |
| 1612 | storage_needed += function_name_len + binary_path_len; |
| 1613 | |
| 1614 | /* |
| 1615 | * The lookup method is aligned to 64-bit within the buffer. |
| 1616 | * This is needed even if there is no lookup method since |
| 1617 | * the next structure in the buffer probably needs to be |
| 1618 | * aligned too (depending on the arch). |
| 1619 | */ |
| 1620 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; |
| 1621 | storage_needed += padding_needed; |
| 1622 | |
| 1623 | if (location->lookup_method) { |
| 1624 | /* NOTE: elf look-up method is assumed here. */ |
| 1625 | storage_needed += sizeof(struct lttng_userspace_probe_location_lookup_method_elf); |
| 1626 | } |
| 1627 | |
| 1628 | if (!buffer) { |
| 1629 | ret = storage_needed; |
| 1630 | goto end; |
| 1631 | } |
| 1632 | |
| 1633 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { |
| 1634 | ret = lttng_dynamic_buffer_set_capacity(buffer, |
| 1635 | buffer->size + storage_needed); |
| 1636 | if (ret) { |
| 1637 | goto end; |
| 1638 | } |
| 1639 | } |
| 1640 | |
| 1641 | memset(&flat_probe, 0, sizeof(flat_probe)); |
| 1642 | |
| 1643 | flat_probe_start = buffer->data + buffer->size; |
| 1644 | flat_probe.parent.type = location->type; |
| 1645 | /* |
| 1646 | * The lookup method, if present, is the last element in the flat |
| 1647 | * representation of the probe. |
| 1648 | */ |
| 1649 | if (location->lookup_method) { |
| 1650 | flat_probe.parent.lookup_method = |
| 1651 | (struct lttng_userspace_probe_location_lookup_method *) |
| 1652 | (flat_probe_start + sizeof(flat_probe) + |
| 1653 | function_name_len + binary_path_len + padding_needed); |
| 1654 | } else { |
| 1655 | flat_probe.parent.lookup_method = NULL; |
| 1656 | } |
| 1657 | |
| 1658 | flat_probe.function_name = flat_probe_start + sizeof(flat_probe); |
| 1659 | flat_probe.binary_path = flat_probe.function_name + function_name_len; |
| 1660 | flat_probe.binary_fd_handle = NULL; |
| 1661 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, |
| 1662 | sizeof(flat_probe)); |
| 1663 | if (ret) { |
| 1664 | goto end; |
| 1665 | } |
| 1666 | |
| 1667 | ret = lttng_dynamic_buffer_append(buffer, |
| 1668 | probe_function->function_name, function_name_len); |
| 1669 | if (ret) { |
| 1670 | goto end; |
| 1671 | } |
| 1672 | ret = lttng_dynamic_buffer_append(buffer, |
| 1673 | probe_function->binary_path, binary_path_len); |
| 1674 | if (ret) { |
| 1675 | goto end; |
| 1676 | } |
| 1677 | |
| 1678 | /* Insert padding before the lookup method. */ |
| 1679 | ret = lttng_dynamic_buffer_set_size(buffer, |
| 1680 | buffer->size + padding_needed); |
| 1681 | if (ret) { |
| 1682 | goto end; |
| 1683 | } |
| 1684 | |
| 1685 | if (!location->lookup_method) { |
| 1686 | /* Not an error, the default method is used. */ |
| 1687 | ret = storage_needed; |
| 1688 | goto end; |
| 1689 | } |
| 1690 | |
| 1691 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); |
| 1692 | flat_lookup_method.parent.type = |
| 1693 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; |
| 1694 | ret = lttng_dynamic_buffer_append(buffer, |
| 1695 | &flat_lookup_method, sizeof(flat_lookup_method)); |
| 1696 | if (ret) { |
| 1697 | goto end; |
| 1698 | } |
| 1699 | ret = storage_needed; |
| 1700 | end: |
| 1701 | return ret; |
| 1702 | } |
| 1703 | |
| 1704 | static |
| 1705 | int lttng_userspace_probe_location_tracepoint_flatten( |
| 1706 | const struct lttng_userspace_probe_location *location, |
| 1707 | struct lttng_dynamic_buffer *buffer) |
| 1708 | { |
| 1709 | struct lttng_userspace_probe_location_lookup_method_sdt flat_lookup_method; |
| 1710 | struct lttng_userspace_probe_location_tracepoint *probe_tracepoint; |
| 1711 | struct lttng_userspace_probe_location_tracepoint flat_probe; |
| 1712 | size_t probe_name_len, provider_name_len, binary_path_len; |
| 1713 | size_t padding_needed = 0; |
| 1714 | int storage_needed = 0; |
| 1715 | char *flat_probe_start; |
| 1716 | int ret = 0; |
| 1717 | |
| 1718 | assert(location); |
| 1719 | |
| 1720 | /* Only SDT tracepoints are supported at the moment */ |
| 1721 | if (location->lookup_method && location->lookup_method->type != |
| 1722 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT) { |
| 1723 | ret = -LTTNG_ERR_INVALID; |
| 1724 | goto end; |
| 1725 | } |
| 1726 | probe_tracepoint = container_of(location, |
| 1727 | struct lttng_userspace_probe_location_tracepoint, |
| 1728 | parent); |
| 1729 | assert(probe_tracepoint->probe_name); |
| 1730 | assert(probe_tracepoint->provider_name); |
| 1731 | assert(probe_tracepoint->binary_path); |
| 1732 | |
| 1733 | /* Compute the storage space needed to flatten the probe location */ |
| 1734 | storage_needed += sizeof(struct lttng_userspace_probe_location_tracepoint); |
| 1735 | |
| 1736 | probe_name_len = strlen(probe_tracepoint->probe_name) + 1; |
| 1737 | provider_name_len = strlen(probe_tracepoint->provider_name) + 1; |
| 1738 | binary_path_len = strlen(probe_tracepoint->binary_path) + 1; |
| 1739 | |
| 1740 | storage_needed += probe_name_len + provider_name_len + binary_path_len; |
| 1741 | |
| 1742 | /* |
| 1743 | * The lookup method is aligned to 64-bit within the buffer. |
| 1744 | * This is needed even if there is no lookup method since |
| 1745 | * the next structure in the buffer probably needs to be |
| 1746 | * aligned too (depending on the arch). |
| 1747 | */ |
| 1748 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; |
| 1749 | storage_needed += padding_needed; |
| 1750 | |
| 1751 | if (location->lookup_method) { |
| 1752 | /* NOTE: elf look-up method is assumed here. */ |
| 1753 | storage_needed += |
| 1754 | sizeof(struct lttng_userspace_probe_location_lookup_method_elf); |
| 1755 | } |
| 1756 | |
| 1757 | /* |
| 1758 | * If the caller set buffer to NULL, return the size of the needed buffer. |
| 1759 | */ |
| 1760 | if (!buffer) { |
| 1761 | ret = storage_needed; |
| 1762 | goto end; |
| 1763 | } |
| 1764 | |
| 1765 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { |
| 1766 | ret = lttng_dynamic_buffer_set_capacity(buffer, |
| 1767 | buffer->size + storage_needed); |
| 1768 | if (ret) { |
| 1769 | goto end; |
| 1770 | } |
| 1771 | } |
| 1772 | |
| 1773 | memset(&flat_probe, 0, sizeof(flat_probe)); |
| 1774 | |
| 1775 | flat_probe_start = buffer->data + buffer->size; |
| 1776 | flat_probe.parent.type = location->type; |
| 1777 | |
| 1778 | /* |
| 1779 | * The lookup method, if present, is the last element in the flat |
| 1780 | * representation of the probe. |
| 1781 | */ |
| 1782 | if (location->lookup_method) { |
| 1783 | flat_probe.parent.lookup_method = |
| 1784 | (struct lttng_userspace_probe_location_lookup_method *) |
| 1785 | (flat_probe_start + sizeof(flat_probe) + |
| 1786 | probe_name_len + provider_name_len + |
| 1787 | binary_path_len + padding_needed); |
| 1788 | } else { |
| 1789 | flat_probe.parent.lookup_method = NULL; |
| 1790 | } |
| 1791 | |
| 1792 | flat_probe.probe_name = flat_probe_start + sizeof(flat_probe); |
| 1793 | flat_probe.provider_name = flat_probe.probe_name + probe_name_len; |
| 1794 | flat_probe.binary_path = flat_probe.provider_name + provider_name_len; |
| 1795 | flat_probe.binary_fd_handle = NULL; |
| 1796 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, sizeof(flat_probe)); |
| 1797 | if (ret) { |
| 1798 | goto end; |
| 1799 | } |
| 1800 | |
| 1801 | /* Append all the fields to the buffer */ |
| 1802 | ret = lttng_dynamic_buffer_append(buffer, |
| 1803 | probe_tracepoint->probe_name, probe_name_len); |
| 1804 | if (ret) { |
| 1805 | goto end; |
| 1806 | } |
| 1807 | ret = lttng_dynamic_buffer_append(buffer, |
| 1808 | probe_tracepoint->provider_name, provider_name_len); |
| 1809 | if (ret) { |
| 1810 | goto end; |
| 1811 | } |
| 1812 | ret = lttng_dynamic_buffer_append(buffer, |
| 1813 | probe_tracepoint->binary_path, binary_path_len); |
| 1814 | if (ret) { |
| 1815 | goto end; |
| 1816 | } |
| 1817 | |
| 1818 | /* Insert padding before the lookup method. */ |
| 1819 | ret = lttng_dynamic_buffer_set_size(buffer, buffer->size + padding_needed); |
| 1820 | if (ret) { |
| 1821 | goto end; |
| 1822 | } |
| 1823 | |
| 1824 | if (!location->lookup_method) { |
| 1825 | /* Not an error, the default method is used. */ |
| 1826 | ret = storage_needed; |
| 1827 | goto end; |
| 1828 | } |
| 1829 | |
| 1830 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); |
| 1831 | |
| 1832 | flat_lookup_method.parent.type = |
| 1833 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; |
| 1834 | ret = lttng_dynamic_buffer_append(buffer, |
| 1835 | &flat_lookup_method, sizeof(flat_lookup_method)); |
| 1836 | if (ret) { |
| 1837 | goto end; |
| 1838 | } |
| 1839 | ret = storage_needed; |
| 1840 | end: |
| 1841 | return ret; |
| 1842 | } |
| 1843 | |
| 1844 | LTTNG_HIDDEN |
| 1845 | int lttng_userspace_probe_location_flatten( |
| 1846 | const struct lttng_userspace_probe_location *location, |
| 1847 | struct lttng_dynamic_buffer *buffer) |
| 1848 | { |
| 1849 | int ret; |
| 1850 | if (!location) { |
| 1851 | ret = -LTTNG_ERR_INVALID; |
| 1852 | goto end; |
| 1853 | } |
| 1854 | |
| 1855 | /* Only types currently supported. */ |
| 1856 | switch (location->type) { |
| 1857 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 1858 | ret = lttng_userspace_probe_location_function_flatten(location, buffer); |
| 1859 | break; |
| 1860 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 1861 | ret = lttng_userspace_probe_location_tracepoint_flatten(location, buffer); |
| 1862 | break; |
| 1863 | default: |
| 1864 | ret = -LTTNG_ERR_INVALID; |
| 1865 | goto end; |
| 1866 | } |
| 1867 | |
| 1868 | end: |
| 1869 | return ret; |
| 1870 | } |
| 1871 | |
| 1872 | LTTNG_HIDDEN |
| 1873 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( |
| 1874 | const struct lttng_userspace_probe_location *location) |
| 1875 | { |
| 1876 | struct lttng_userspace_probe_location *new_location = NULL; |
| 1877 | enum lttng_userspace_probe_location_type type; |
| 1878 | |
| 1879 | if (!location) { |
| 1880 | goto err; |
| 1881 | } |
| 1882 | |
| 1883 | type = lttng_userspace_probe_location_get_type(location); |
| 1884 | switch (type) { |
| 1885 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 1886 | new_location = |
| 1887 | lttng_userspace_probe_location_function_copy(location); |
| 1888 | if (!new_location) { |
| 1889 | goto err; |
| 1890 | } |
| 1891 | break; |
| 1892 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 1893 | new_location = |
| 1894 | lttng_userspace_probe_location_tracepoint_copy(location); |
| 1895 | if (!new_location) { |
| 1896 | goto err; |
| 1897 | } |
| 1898 | break; |
| 1899 | default: |
| 1900 | new_location = NULL; |
| 1901 | goto err; |
| 1902 | } |
| 1903 | err: |
| 1904 | return new_location; |
| 1905 | } |
| 1906 | |
| 1907 | LTTNG_HIDDEN |
| 1908 | bool lttng_userspace_probe_location_lookup_method_is_equal( |
| 1909 | const struct lttng_userspace_probe_location_lookup_method *a, |
| 1910 | const struct lttng_userspace_probe_location_lookup_method *b) |
| 1911 | { |
| 1912 | bool is_equal = false; |
| 1913 | |
| 1914 | if (!a || !b) { |
| 1915 | goto end; |
| 1916 | } |
| 1917 | |
| 1918 | if (a == b) { |
| 1919 | is_equal = true; |
| 1920 | goto end; |
| 1921 | } |
| 1922 | |
| 1923 | if (a->type != b->type) { |
| 1924 | goto end; |
| 1925 | } |
| 1926 | |
| 1927 | is_equal = true; |
| 1928 | end: |
| 1929 | return is_equal; |
| 1930 | } |
| 1931 | |
| 1932 | LTTNG_HIDDEN |
| 1933 | bool lttng_userspace_probe_location_is_equal( |
| 1934 | const struct lttng_userspace_probe_location *a, |
| 1935 | const struct lttng_userspace_probe_location *b) |
| 1936 | { |
| 1937 | bool is_equal = false; |
| 1938 | |
| 1939 | if (!a || !b) { |
| 1940 | goto end; |
| 1941 | } |
| 1942 | |
| 1943 | if (a == b) { |
| 1944 | is_equal = true; |
| 1945 | goto end; |
| 1946 | } |
| 1947 | |
| 1948 | if (!lttng_userspace_probe_location_lookup_method_is_equal( |
| 1949 | a->lookup_method, b->lookup_method)) { |
| 1950 | goto end; |
| 1951 | } |
| 1952 | |
| 1953 | if (a->type != b->type) { |
| 1954 | goto end; |
| 1955 | } |
| 1956 | |
| 1957 | is_equal = a->equal ? a->equal(a, b) : true; |
| 1958 | end: |
| 1959 | return is_equal; |
| 1960 | } |
| 1961 | |
| 1962 | LTTNG_HIDDEN |
| 1963 | unsigned long lttng_userspace_probe_location_hash( |
| 1964 | const struct lttng_userspace_probe_location *location) |
| 1965 | { |
| 1966 | return location->hash(location); |
| 1967 | } |