| 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 <assert.h> |
| 9 | #include <common/error.h> |
| 10 | #include <common/macros.h> |
| 11 | #include <common/compat/string.h> |
| 12 | #include <fcntl.h> |
| 13 | #include <lttng/constant.h> |
| 14 | #include <lttng/userspace-probe-internal.h> |
| 15 | |
| 16 | enum lttng_userspace_probe_location_lookup_method_type |
| 17 | lttng_userspace_probe_location_lookup_method_get_type( |
| 18 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 19 | { |
| 20 | return lookup_method ? lookup_method->type : |
| 21 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_UNKNOWN; |
| 22 | } |
| 23 | |
| 24 | void lttng_userspace_probe_location_lookup_method_destroy( |
| 25 | struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 26 | { |
| 27 | if (!lookup_method){ |
| 28 | return; |
| 29 | } |
| 30 | |
| 31 | free(lookup_method); |
| 32 | } |
| 33 | |
| 34 | struct lttng_userspace_probe_location_lookup_method * |
| 35 | lttng_userspace_probe_location_lookup_method_function_elf_create(void) |
| 36 | { |
| 37 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 38 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; |
| 39 | |
| 40 | elf_method = zmalloc(sizeof(*elf_method)); |
| 41 | if (!elf_method) { |
| 42 | PERROR("zmalloc"); |
| 43 | goto end; |
| 44 | } |
| 45 | |
| 46 | ret = &elf_method->parent; |
| 47 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; |
| 48 | end: |
| 49 | return ret; |
| 50 | } |
| 51 | |
| 52 | struct lttng_userspace_probe_location_lookup_method * |
| 53 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(void) |
| 54 | { |
| 55 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 56 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; |
| 57 | |
| 58 | sdt_method = zmalloc(sizeof(*sdt_method)); |
| 59 | if (!sdt_method) { |
| 60 | PERROR("zmalloc"); |
| 61 | goto end; |
| 62 | } |
| 63 | |
| 64 | ret = &sdt_method->parent; |
| 65 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; |
| 66 | end: |
| 67 | return ret; |
| 68 | } |
| 69 | |
| 70 | enum lttng_userspace_probe_location_type lttng_userspace_probe_location_get_type( |
| 71 | const struct lttng_userspace_probe_location *location) |
| 72 | { |
| 73 | return location ? location->type : |
| 74 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN; |
| 75 | } |
| 76 | |
| 77 | static |
| 78 | void lttng_userspace_probe_location_function_destroy( |
| 79 | struct lttng_userspace_probe_location *location) |
| 80 | { |
| 81 | struct lttng_userspace_probe_location_function *location_function = NULL; |
| 82 | |
| 83 | assert(location); |
| 84 | |
| 85 | location_function = container_of(location, |
| 86 | struct lttng_userspace_probe_location_function, parent); |
| 87 | |
| 88 | assert(location_function); |
| 89 | |
| 90 | free(location_function->function_name); |
| 91 | free(location_function->binary_path); |
| 92 | if (location_function->binary_fd >= 0) { |
| 93 | if (close(location_function->binary_fd)) { |
| 94 | PERROR("close"); |
| 95 | } |
| 96 | } |
| 97 | free(location); |
| 98 | } |
| 99 | |
| 100 | static |
| 101 | void lttng_userspace_probe_location_tracepoint_destroy( |
| 102 | struct lttng_userspace_probe_location *location) |
| 103 | { |
| 104 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint = NULL; |
| 105 | |
| 106 | assert(location); |
| 107 | |
| 108 | location_tracepoint = container_of(location, |
| 109 | struct lttng_userspace_probe_location_tracepoint, |
| 110 | parent); |
| 111 | |
| 112 | assert(location_tracepoint); |
| 113 | |
| 114 | free(location_tracepoint->probe_name); |
| 115 | free(location_tracepoint->provider_name); |
| 116 | free(location_tracepoint->binary_path); |
| 117 | if (location_tracepoint->binary_fd >= 0) { |
| 118 | if (close(location_tracepoint->binary_fd)) { |
| 119 | PERROR("close"); |
| 120 | } |
| 121 | } |
| 122 | free(location); |
| 123 | } |
| 124 | |
| 125 | void lttng_userspace_probe_location_destroy( |
| 126 | struct lttng_userspace_probe_location *location) |
| 127 | { |
| 128 | if (!location) { |
| 129 | return; |
| 130 | } |
| 131 | |
| 132 | lttng_userspace_probe_location_lookup_method_destroy( |
| 133 | location->lookup_method); |
| 134 | |
| 135 | switch (location->type) { |
| 136 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 137 | lttng_userspace_probe_location_function_destroy(location); |
| 138 | break; |
| 139 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 140 | lttng_userspace_probe_location_tracepoint_destroy(location); |
| 141 | break; |
| 142 | default: |
| 143 | abort(); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | static struct lttng_userspace_probe_location * |
| 148 | lttng_userspace_probe_location_function_create_no_check(const char *binary_path, |
| 149 | const char *function_name, |
| 150 | struct lttng_userspace_probe_location_lookup_method *lookup_method, |
| 151 | bool open_binary) |
| 152 | { |
| 153 | int binary_fd = -1; |
| 154 | char *function_name_copy = NULL, *binary_path_copy = NULL; |
| 155 | struct lttng_userspace_probe_location *ret = NULL; |
| 156 | struct lttng_userspace_probe_location_function *location; |
| 157 | |
| 158 | if (open_binary) { |
| 159 | binary_fd = open(binary_path, O_RDONLY); |
| 160 | if (binary_fd < 0) { |
| 161 | PERROR("Error opening the binary"); |
| 162 | goto error; |
| 163 | } |
| 164 | } else { |
| 165 | binary_fd = -1; |
| 166 | } |
| 167 | |
| 168 | function_name_copy = lttng_strndup(function_name, LTTNG_SYMBOL_NAME_LEN); |
| 169 | if (!function_name_copy) { |
| 170 | PERROR("Error duplicating the function name"); |
| 171 | goto error; |
| 172 | } |
| 173 | |
| 174 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); |
| 175 | if (!binary_path_copy) { |
| 176 | PERROR("Error duplicating the function name"); |
| 177 | goto error; |
| 178 | } |
| 179 | |
| 180 | location = zmalloc(sizeof(*location)); |
| 181 | if (!location) { |
| 182 | PERROR("Error allocating userspace probe location"); |
| 183 | goto error; |
| 184 | } |
| 185 | |
| 186 | location->function_name = function_name_copy; |
| 187 | location->binary_path = binary_path_copy; |
| 188 | location->binary_fd = binary_fd; |
| 189 | location->instrumentation_type = |
| 190 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY; |
| 191 | |
| 192 | ret = &location->parent; |
| 193 | ret->lookup_method = lookup_method; |
| 194 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION; |
| 195 | goto end; |
| 196 | |
| 197 | error: |
| 198 | free(function_name_copy); |
| 199 | free(binary_path_copy); |
| 200 | if (binary_fd >= 0) { |
| 201 | if (close(binary_fd)) { |
| 202 | PERROR("Error closing binary fd in error path"); |
| 203 | } |
| 204 | } |
| 205 | end: |
| 206 | return ret; |
| 207 | } |
| 208 | |
| 209 | static struct lttng_userspace_probe_location * |
| 210 | lttng_userspace_probe_location_tracepoint_create_no_check(const char *binary_path, |
| 211 | const char *provider_name, const char *probe_name, |
| 212 | struct lttng_userspace_probe_location_lookup_method *lookup_method, |
| 213 | bool open_binary) |
| 214 | { |
| 215 | int binary_fd = -1; |
| 216 | char *probe_name_copy = NULL; |
| 217 | char *provider_name_copy = NULL; |
| 218 | char *binary_path_copy = NULL; |
| 219 | struct lttng_userspace_probe_location *ret = NULL; |
| 220 | struct lttng_userspace_probe_location_tracepoint *location; |
| 221 | |
| 222 | if (open_binary) { |
| 223 | binary_fd = open(binary_path, O_RDONLY); |
| 224 | if (binary_fd < 0) { |
| 225 | PERROR("open"); |
| 226 | goto error; |
| 227 | } |
| 228 | } else { |
| 229 | binary_fd = -1; |
| 230 | } |
| 231 | |
| 232 | probe_name_copy = lttng_strndup(probe_name, LTTNG_SYMBOL_NAME_LEN); |
| 233 | if (!probe_name_copy) { |
| 234 | PERROR("lttng_strndup"); |
| 235 | goto error; |
| 236 | } |
| 237 | |
| 238 | provider_name_copy = lttng_strndup(provider_name, LTTNG_SYMBOL_NAME_LEN); |
| 239 | if (!provider_name_copy) { |
| 240 | PERROR("lttng_strndup"); |
| 241 | goto error; |
| 242 | } |
| 243 | |
| 244 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); |
| 245 | if (!binary_path_copy) { |
| 246 | PERROR("lttng_strndup"); |
| 247 | goto error; |
| 248 | } |
| 249 | |
| 250 | location = zmalloc(sizeof(*location)); |
| 251 | if (!location) { |
| 252 | PERROR("zmalloc"); |
| 253 | goto error; |
| 254 | } |
| 255 | |
| 256 | location->probe_name = probe_name_copy; |
| 257 | location->provider_name = provider_name_copy; |
| 258 | location->binary_path = binary_path_copy; |
| 259 | location->binary_fd = binary_fd; |
| 260 | |
| 261 | ret = &location->parent; |
| 262 | ret->lookup_method = lookup_method; |
| 263 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT; |
| 264 | goto end; |
| 265 | |
| 266 | error: |
| 267 | free(probe_name_copy); |
| 268 | free(provider_name_copy); |
| 269 | free(binary_path_copy); |
| 270 | if (binary_fd >= 0) { |
| 271 | if (close(binary_fd)) { |
| 272 | PERROR("Error closing binary fd in error path"); |
| 273 | } |
| 274 | } |
| 275 | end: |
| 276 | return ret; |
| 277 | } |
| 278 | |
| 279 | struct lttng_userspace_probe_location * |
| 280 | lttng_userspace_probe_location_function_create(const char *binary_path, |
| 281 | const char *function_name, |
| 282 | struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 283 | { |
| 284 | struct lttng_userspace_probe_location *ret = NULL; |
| 285 | |
| 286 | if (!binary_path || !function_name) { |
| 287 | ERR("Invalid argument(s)"); |
| 288 | goto end; |
| 289 | } |
| 290 | |
| 291 | switch (lttng_userspace_probe_location_lookup_method_get_type( |
| 292 | lookup_method)) { |
| 293 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: |
| 294 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: |
| 295 | break; |
| 296 | default: |
| 297 | /* Invalid probe location lookup method. */ |
| 298 | goto end; |
| 299 | } |
| 300 | |
| 301 | ret = lttng_userspace_probe_location_function_create_no_check( |
| 302 | binary_path, function_name, lookup_method, true); |
| 303 | end: |
| 304 | return ret; |
| 305 | } |
| 306 | |
| 307 | struct lttng_userspace_probe_location * |
| 308 | lttng_userspace_probe_location_tracepoint_create(const char *binary_path, |
| 309 | const char *provider_name, const char *probe_name, |
| 310 | struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 311 | { |
| 312 | struct lttng_userspace_probe_location *ret = NULL; |
| 313 | |
| 314 | if (!binary_path || !probe_name || !provider_name) { |
| 315 | ERR("Invalid argument(s)"); |
| 316 | goto end; |
| 317 | } |
| 318 | |
| 319 | switch (lttng_userspace_probe_location_lookup_method_get_type( |
| 320 | lookup_method)) { |
| 321 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
| 322 | break; |
| 323 | default: |
| 324 | /* Invalid probe location lookup method. */ |
| 325 | goto end; |
| 326 | } |
| 327 | |
| 328 | ret = lttng_userspace_probe_location_tracepoint_create_no_check( |
| 329 | binary_path, provider_name, probe_name, lookup_method, true); |
| 330 | end: |
| 331 | return ret; |
| 332 | } |
| 333 | |
| 334 | static struct lttng_userspace_probe_location_lookup_method * |
| 335 | lttng_userspace_probe_location_lookup_method_function_elf_copy( |
| 336 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 337 | { |
| 338 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; |
| 339 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; |
| 340 | |
| 341 | assert(lookup_method); |
| 342 | assert(lookup_method->type == |
| 343 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF); |
| 344 | |
| 345 | elf_method = zmalloc(sizeof(*elf_method)); |
| 346 | if (!elf_method) { |
| 347 | PERROR("Error allocating ELF userspace probe lookup method"); |
| 348 | goto error; |
| 349 | } |
| 350 | |
| 351 | elf_method->parent.type = lookup_method->type; |
| 352 | parent = &elf_method->parent; |
| 353 | |
| 354 | goto end; |
| 355 | error: |
| 356 | parent = NULL; |
| 357 | end: |
| 358 | return parent; |
| 359 | } |
| 360 | |
| 361 | static struct lttng_userspace_probe_location_lookup_method * |
| 362 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( |
| 363 | struct lttng_userspace_probe_location_lookup_method *lookup_method) |
| 364 | { |
| 365 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; |
| 366 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; |
| 367 | |
| 368 | assert(lookup_method); |
| 369 | assert(lookup_method->type == |
| 370 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT); |
| 371 | |
| 372 | sdt_method = zmalloc(sizeof(*sdt_method)); |
| 373 | if (!sdt_method) { |
| 374 | PERROR("zmalloc"); |
| 375 | goto error; |
| 376 | } |
| 377 | |
| 378 | sdt_method->parent.type = lookup_method->type; |
| 379 | parent = &sdt_method->parent; |
| 380 | |
| 381 | goto end; |
| 382 | |
| 383 | error: |
| 384 | parent = NULL; |
| 385 | end: |
| 386 | return parent; |
| 387 | } |
| 388 | |
| 389 | static struct lttng_userspace_probe_location * |
| 390 | lttng_userspace_probe_location_function_copy( |
| 391 | const struct lttng_userspace_probe_location *location) |
| 392 | { |
| 393 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
| 394 | struct lttng_userspace_probe_location *new_location = NULL; |
| 395 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; |
| 396 | const char *binary_path = NULL; |
| 397 | const char *function_name = NULL; |
| 398 | int fd, new_fd; |
| 399 | |
| 400 | assert(location); |
| 401 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); |
| 402 | |
| 403 | /* Get probe location fields */ |
| 404 | binary_path = lttng_userspace_probe_location_function_get_binary_path(location); |
| 405 | if (!binary_path) { |
| 406 | ERR("Userspace probe binary path is NULL"); |
| 407 | goto error; |
| 408 | } |
| 409 | |
| 410 | function_name = lttng_userspace_probe_location_function_get_function_name(location); |
| 411 | if (!function_name) { |
| 412 | ERR("Userspace probe function name is NULL"); |
| 413 | goto error; |
| 414 | } |
| 415 | |
| 416 | /* Duplicate the binary fd */ |
| 417 | fd = lttng_userspace_probe_location_function_get_binary_fd(location); |
| 418 | if (fd == -1) { |
| 419 | ERR("Error getting file descriptor to binary"); |
| 420 | goto error; |
| 421 | } |
| 422 | |
| 423 | new_fd = dup(fd); |
| 424 | if (new_fd == -1) { |
| 425 | PERROR("Error duplicating file descriptor to binary"); |
| 426 | goto error; |
| 427 | } |
| 428 | |
| 429 | /* |
| 430 | * Duplicate probe location method fields |
| 431 | */ |
| 432 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( |
| 433 | location->lookup_method); |
| 434 | switch (lookup_type) { |
| 435 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: |
| 436 | lookup_method = |
| 437 | lttng_userspace_probe_location_lookup_method_function_elf_copy( |
| 438 | location->lookup_method); |
| 439 | if (!lookup_method) { |
| 440 | goto close_fd; |
| 441 | } |
| 442 | break; |
| 443 | default: |
| 444 | /* Invalid probe location lookup method. */ |
| 445 | goto close_fd; |
| 446 | } |
| 447 | |
| 448 | /* Create the probe_location */ |
| 449 | new_location = lttng_userspace_probe_location_function_create_no_check( |
| 450 | binary_path, function_name, lookup_method, false); |
| 451 | if (!new_location) { |
| 452 | goto destroy_lookup_method; |
| 453 | } |
| 454 | |
| 455 | /* Set the duplicated fd to the new probe_location */ |
| 456 | if (lttng_userspace_probe_location_function_set_binary_fd(new_location, new_fd) < 0) { |
| 457 | goto destroy_probe_location; |
| 458 | } |
| 459 | |
| 460 | goto end; |
| 461 | |
| 462 | destroy_probe_location: |
| 463 | lttng_userspace_probe_location_destroy(new_location); |
| 464 | destroy_lookup_method: |
| 465 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); |
| 466 | close_fd: |
| 467 | if (close(new_fd) < 0) { |
| 468 | PERROR("Error closing duplicated file descriptor in error path"); |
| 469 | } |
| 470 | error: |
| 471 | new_location = NULL; |
| 472 | end: |
| 473 | return new_location; |
| 474 | } |
| 475 | |
| 476 | static struct lttng_userspace_probe_location * |
| 477 | lttng_userspace_probe_location_tracepoint_copy( |
| 478 | const struct lttng_userspace_probe_location *location) |
| 479 | { |
| 480 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; |
| 481 | struct lttng_userspace_probe_location *new_location = NULL; |
| 482 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; |
| 483 | const char *binary_path = NULL; |
| 484 | const char *probe_name = NULL; |
| 485 | const char *provider_name = NULL; |
| 486 | int fd, new_fd; |
| 487 | |
| 488 | assert(location); |
| 489 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
| 490 | |
| 491 | /* Get probe location fields */ |
| 492 | binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location); |
| 493 | if (!binary_path) { |
| 494 | ERR("Userspace probe binary path is NULL"); |
| 495 | goto error; |
| 496 | } |
| 497 | |
| 498 | probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location); |
| 499 | if (!probe_name) { |
| 500 | ERR("Userspace probe probe name is NULL"); |
| 501 | goto error; |
| 502 | } |
| 503 | |
| 504 | provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location); |
| 505 | if (!provider_name) { |
| 506 | ERR("Userspace probe provider name is NULL"); |
| 507 | goto error; |
| 508 | } |
| 509 | |
| 510 | /* Duplicate the binary fd */ |
| 511 | fd = lttng_userspace_probe_location_tracepoint_get_binary_fd(location); |
| 512 | if (fd == -1) { |
| 513 | ERR("Error getting file descriptor to binary"); |
| 514 | goto error; |
| 515 | } |
| 516 | |
| 517 | new_fd = dup(fd); |
| 518 | if (new_fd == -1) { |
| 519 | PERROR("Error duplicating file descriptor to binary"); |
| 520 | goto error; |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * Duplicate probe location method fields |
| 525 | */ |
| 526 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( |
| 527 | location->lookup_method); |
| 528 | switch (lookup_type) { |
| 529 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
| 530 | lookup_method = |
| 531 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( |
| 532 | location->lookup_method); |
| 533 | if (!lookup_method) { |
| 534 | goto close_fd; |
| 535 | } |
| 536 | break; |
| 537 | default: |
| 538 | /* Invalid probe location lookup method. */ |
| 539 | goto close_fd; |
| 540 | } |
| 541 | |
| 542 | /* Create the probe_location */ |
| 543 | new_location = lttng_userspace_probe_location_tracepoint_create_no_check( |
| 544 | binary_path, provider_name, probe_name, lookup_method, false); |
| 545 | if (!new_location) { |
| 546 | goto destroy_lookup_method; |
| 547 | } |
| 548 | |
| 549 | /* Set the duplicated fd to the new probe_location */ |
| 550 | if (lttng_userspace_probe_location_tracepoint_set_binary_fd(new_location, new_fd) < 0) { |
| 551 | goto destroy_probe_location; |
| 552 | } |
| 553 | |
| 554 | goto end; |
| 555 | |
| 556 | destroy_probe_location: |
| 557 | lttng_userspace_probe_location_destroy(new_location); |
| 558 | destroy_lookup_method: |
| 559 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); |
| 560 | close_fd: |
| 561 | if (close(new_fd) < 0) { |
| 562 | PERROR("Error closing duplicated file descriptor in error path"); |
| 563 | } |
| 564 | error: |
| 565 | new_location = NULL; |
| 566 | end: |
| 567 | return new_location; |
| 568 | } |
| 569 | |
| 570 | const char *lttng_userspace_probe_location_function_get_binary_path( |
| 571 | const struct lttng_userspace_probe_location *location) |
| 572 | { |
| 573 | const char *ret = NULL; |
| 574 | struct lttng_userspace_probe_location_function *function_location; |
| 575 | |
| 576 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 577 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 578 | ERR("Invalid argument(s)"); |
| 579 | goto end; |
| 580 | } |
| 581 | |
| 582 | function_location = container_of(location, |
| 583 | struct lttng_userspace_probe_location_function, |
| 584 | parent); |
| 585 | ret = function_location->binary_path; |
| 586 | end: |
| 587 | return ret; |
| 588 | } |
| 589 | |
| 590 | const char *lttng_userspace_probe_location_tracepoint_get_binary_path( |
| 591 | const struct lttng_userspace_probe_location *location) |
| 592 | { |
| 593 | const char *ret = NULL; |
| 594 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 595 | |
| 596 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 597 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 598 | ERR("Invalid argument(s)"); |
| 599 | goto end; |
| 600 | } |
| 601 | |
| 602 | tracepoint_location = container_of(location, |
| 603 | struct lttng_userspace_probe_location_tracepoint, |
| 604 | parent); |
| 605 | ret = tracepoint_location->binary_path; |
| 606 | end: |
| 607 | return ret; |
| 608 | } |
| 609 | |
| 610 | const char *lttng_userspace_probe_location_function_get_function_name( |
| 611 | const struct lttng_userspace_probe_location *location) |
| 612 | { |
| 613 | const char *ret = NULL; |
| 614 | struct lttng_userspace_probe_location_function *function_location; |
| 615 | |
| 616 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 617 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 618 | ERR("Invalid argument(s)"); |
| 619 | goto end; |
| 620 | } |
| 621 | |
| 622 | function_location = container_of(location, |
| 623 | struct lttng_userspace_probe_location_function, parent); |
| 624 | ret = function_location->function_name; |
| 625 | end: |
| 626 | return ret; |
| 627 | } |
| 628 | |
| 629 | const char *lttng_userspace_probe_location_tracepoint_get_probe_name( |
| 630 | const struct lttng_userspace_probe_location *location) |
| 631 | { |
| 632 | const char *ret = NULL; |
| 633 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 634 | |
| 635 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 636 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 637 | ERR("Invalid argument(s)"); |
| 638 | goto end; |
| 639 | } |
| 640 | |
| 641 | tracepoint_location = container_of(location, |
| 642 | struct lttng_userspace_probe_location_tracepoint, parent); |
| 643 | ret = tracepoint_location->probe_name; |
| 644 | end: |
| 645 | return ret; |
| 646 | } |
| 647 | |
| 648 | const char *lttng_userspace_probe_location_tracepoint_get_provider_name( |
| 649 | const struct lttng_userspace_probe_location *location) |
| 650 | { |
| 651 | const char *ret = NULL; |
| 652 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 653 | |
| 654 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 655 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 656 | ERR("Invalid argument(s)"); |
| 657 | goto end; |
| 658 | } |
| 659 | |
| 660 | tracepoint_location = container_of(location, |
| 661 | struct lttng_userspace_probe_location_tracepoint, parent); |
| 662 | ret = tracepoint_location->provider_name; |
| 663 | end: |
| 664 | return ret; |
| 665 | } |
| 666 | |
| 667 | int lttng_userspace_probe_location_function_get_binary_fd( |
| 668 | const struct lttng_userspace_probe_location *location) |
| 669 | { |
| 670 | int ret = -1; |
| 671 | struct lttng_userspace_probe_location_function *function_location; |
| 672 | |
| 673 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 674 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 675 | ERR("Invalid argument(s)"); |
| 676 | goto end; |
| 677 | } |
| 678 | |
| 679 | function_location = container_of(location, |
| 680 | struct lttng_userspace_probe_location_function, parent); |
| 681 | ret = function_location->binary_fd; |
| 682 | end: |
| 683 | return ret; |
| 684 | } |
| 685 | |
| 686 | enum lttng_userspace_probe_location_function_instrumentation_type |
| 687 | lttng_userspace_probe_location_function_get_instrumentation_type( |
| 688 | const struct lttng_userspace_probe_location *location) |
| 689 | { |
| 690 | enum lttng_userspace_probe_location_function_instrumentation_type type; |
| 691 | struct lttng_userspace_probe_location_function *function_location; |
| 692 | |
| 693 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 694 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 695 | ERR("Invalid argument(s)"); |
| 696 | type = LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_UNKNOWN; |
| 697 | goto end; |
| 698 | } |
| 699 | |
| 700 | function_location = container_of(location, |
| 701 | struct lttng_userspace_probe_location_function, parent); |
| 702 | type = function_location->instrumentation_type; |
| 703 | end: |
| 704 | return type; |
| 705 | } |
| 706 | |
| 707 | enum lttng_userspace_probe_location_status |
| 708 | lttng_userspace_probe_location_function_set_instrumentation_type( |
| 709 | const struct lttng_userspace_probe_location *location, |
| 710 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type) |
| 711 | { |
| 712 | enum lttng_userspace_probe_location_status status = |
| 713 | LTTNG_USERSPACE_PROBE_LOCATION_STATUS_OK; |
| 714 | struct lttng_userspace_probe_location_function *function_location; |
| 715 | |
| 716 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 717 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION || |
| 718 | instrumentation_type != |
| 719 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY) { |
| 720 | ERR("Invalid argument(s)"); |
| 721 | status = LTTNG_USERSPACE_PROBE_LOCATION_STATUS_INVALID; |
| 722 | goto end; |
| 723 | } |
| 724 | |
| 725 | function_location = container_of(location, |
| 726 | struct lttng_userspace_probe_location_function, parent); |
| 727 | function_location->instrumentation_type = instrumentation_type; |
| 728 | end: |
| 729 | return status; |
| 730 | } |
| 731 | |
| 732 | int lttng_userspace_probe_location_tracepoint_get_binary_fd( |
| 733 | const struct lttng_userspace_probe_location *location) |
| 734 | { |
| 735 | int ret = -1; |
| 736 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 737 | |
| 738 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 739 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 740 | ERR("Invalid argument(s)"); |
| 741 | goto end; |
| 742 | } |
| 743 | |
| 744 | tracepoint_location = container_of(location, |
| 745 | struct lttng_userspace_probe_location_tracepoint, parent); |
| 746 | ret = tracepoint_location->binary_fd; |
| 747 | end: |
| 748 | return ret; |
| 749 | } |
| 750 | |
| 751 | static struct lttng_userspace_probe_location_lookup_method * |
| 752 | lttng_userspace_probe_location_function_get_lookup_method( |
| 753 | const struct lttng_userspace_probe_location *location) |
| 754 | { |
| 755 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 756 | |
| 757 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 758 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { |
| 759 | ERR("Invalid argument(s)"); |
| 760 | goto end; |
| 761 | } |
| 762 | |
| 763 | ret = location->lookup_method; |
| 764 | end: |
| 765 | return ret; |
| 766 | } |
| 767 | |
| 768 | static struct lttng_userspace_probe_location_lookup_method * |
| 769 | lttng_userspace_probe_location_tracepoint_get_lookup_method( |
| 770 | const struct lttng_userspace_probe_location *location) |
| 771 | { |
| 772 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 773 | |
| 774 | if (!location || lttng_userspace_probe_location_get_type(location) != |
| 775 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { |
| 776 | ERR("Invalid argument(s)"); |
| 777 | goto end; |
| 778 | } |
| 779 | |
| 780 | ret = location->lookup_method; |
| 781 | end: |
| 782 | return ret; |
| 783 | } |
| 784 | |
| 785 | const struct lttng_userspace_probe_location_lookup_method * |
| 786 | lttng_userspace_probe_location_get_lookup_method( |
| 787 | const struct lttng_userspace_probe_location *location) |
| 788 | { |
| 789 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; |
| 790 | |
| 791 | assert(location); |
| 792 | switch (location->type) { |
| 793 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 794 | ret = lttng_userspace_probe_location_function_get_lookup_method( |
| 795 | location); |
| 796 | break; |
| 797 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 798 | ret = lttng_userspace_probe_location_tracepoint_get_lookup_method( |
| 799 | location); |
| 800 | break; |
| 801 | default: |
| 802 | ERR("Unknowned lookup method."); |
| 803 | break; |
| 804 | } |
| 805 | return ret; |
| 806 | } |
| 807 | |
| 808 | static |
| 809 | int lttng_userspace_probe_location_lookup_method_serialize( |
| 810 | struct lttng_userspace_probe_location_lookup_method *method, |
| 811 | struct lttng_dynamic_buffer *buffer) |
| 812 | { |
| 813 | int ret; |
| 814 | struct lttng_userspace_probe_location_lookup_method_comm |
| 815 | lookup_method_comm; |
| 816 | |
| 817 | lookup_method_comm.type = (int8_t) (method ? method->type : |
| 818 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT); |
| 819 | if (buffer) { |
| 820 | ret = lttng_dynamic_buffer_append(buffer, &lookup_method_comm, |
| 821 | sizeof(lookup_method_comm)); |
| 822 | if (ret) { |
| 823 | goto end; |
| 824 | } |
| 825 | } |
| 826 | ret = sizeof(lookup_method_comm); |
| 827 | end: |
| 828 | return ret; |
| 829 | } |
| 830 | |
| 831 | static |
| 832 | int lttng_userspace_probe_location_function_serialize( |
| 833 | const struct lttng_userspace_probe_location *location, |
| 834 | struct lttng_dynamic_buffer *buffer, |
| 835 | int *binary_fd) |
| 836 | { |
| 837 | int ret; |
| 838 | size_t function_name_len, binary_path_len; |
| 839 | struct lttng_userspace_probe_location_function *location_function; |
| 840 | struct lttng_userspace_probe_location_function_comm location_function_comm; |
| 841 | |
| 842 | assert(location); |
| 843 | assert(lttng_userspace_probe_location_get_type(location) == |
| 844 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); |
| 845 | |
| 846 | location_function = container_of(location, |
| 847 | struct lttng_userspace_probe_location_function, |
| 848 | parent); |
| 849 | if (!location_function->function_name || !location_function->binary_path) { |
| 850 | ret = -LTTNG_ERR_INVALID; |
| 851 | goto end; |
| 852 | } |
| 853 | |
| 854 | if (binary_fd && location_function->binary_fd < 0) { |
| 855 | ret = -LTTNG_ERR_INVALID; |
| 856 | goto end; |
| 857 | } |
| 858 | |
| 859 | if (binary_fd) { |
| 860 | *binary_fd = location_function->binary_fd; |
| 861 | } |
| 862 | |
| 863 | function_name_len = strlen(location_function->function_name); |
| 864 | if (function_name_len == 0) { |
| 865 | ret = -LTTNG_ERR_INVALID; |
| 866 | goto end; |
| 867 | } |
| 868 | binary_path_len = strlen(location_function->binary_path); |
| 869 | if (binary_path_len == 0) { |
| 870 | ret = -LTTNG_ERR_INVALID; |
| 871 | goto end; |
| 872 | } |
| 873 | |
| 874 | location_function_comm.function_name_len = function_name_len + 1; |
| 875 | location_function_comm.binary_path_len = binary_path_len + 1; |
| 876 | |
| 877 | if (buffer) { |
| 878 | ret = lttng_dynamic_buffer_append(buffer, |
| 879 | &location_function_comm, |
| 880 | sizeof(location_function_comm)); |
| 881 | if (ret) { |
| 882 | ret = -LTTNG_ERR_INVALID; |
| 883 | goto end; |
| 884 | } |
| 885 | ret = lttng_dynamic_buffer_append(buffer, |
| 886 | location_function->function_name, |
| 887 | location_function_comm.function_name_len); |
| 888 | if (ret) { |
| 889 | ret = -LTTNG_ERR_INVALID; |
| 890 | goto end; |
| 891 | } |
| 892 | ret = lttng_dynamic_buffer_append(buffer, |
| 893 | location_function->binary_path, |
| 894 | location_function_comm.binary_path_len); |
| 895 | if (ret) { |
| 896 | ret = -LTTNG_ERR_INVALID; |
| 897 | goto end; |
| 898 | } |
| 899 | } |
| 900 | ret = sizeof(location_function_comm) + |
| 901 | location_function_comm.function_name_len + |
| 902 | location_function_comm.binary_path_len; |
| 903 | end: |
| 904 | return ret; |
| 905 | } |
| 906 | |
| 907 | static |
| 908 | int lttng_userspace_probe_location_tracepoint_serialize( |
| 909 | const struct lttng_userspace_probe_location *location, |
| 910 | struct lttng_dynamic_buffer *buffer, |
| 911 | int *binary_fd) |
| 912 | { |
| 913 | int ret; |
| 914 | size_t probe_name_len, provider_name_len, binary_path_len; |
| 915 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint; |
| 916 | struct lttng_userspace_probe_location_tracepoint_comm location_tracepoint_comm; |
| 917 | |
| 918 | assert(location); |
| 919 | assert(lttng_userspace_probe_location_get_type(location) == |
| 920 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
| 921 | |
| 922 | location_tracepoint = container_of(location, |
| 923 | struct lttng_userspace_probe_location_tracepoint, |
| 924 | parent); |
| 925 | if (!location_tracepoint->probe_name || |
| 926 | !location_tracepoint->provider_name || |
| 927 | !location_tracepoint->binary_path) { |
| 928 | ret = -LTTNG_ERR_INVALID; |
| 929 | goto end; |
| 930 | } |
| 931 | |
| 932 | if (binary_fd && location_tracepoint->binary_fd < 0) { |
| 933 | ret = -LTTNG_ERR_INVALID; |
| 934 | goto end; |
| 935 | } |
| 936 | |
| 937 | if (binary_fd) { |
| 938 | *binary_fd = location_tracepoint->binary_fd; |
| 939 | } |
| 940 | |
| 941 | probe_name_len = strlen(location_tracepoint->probe_name); |
| 942 | if (probe_name_len == 0) { |
| 943 | ret = -LTTNG_ERR_INVALID; |
| 944 | goto end; |
| 945 | } |
| 946 | |
| 947 | provider_name_len = strlen(location_tracepoint->provider_name); |
| 948 | if (provider_name_len == 0) { |
| 949 | ret = -LTTNG_ERR_INVALID; |
| 950 | goto end; |
| 951 | } |
| 952 | |
| 953 | binary_path_len = strlen(location_tracepoint->binary_path); |
| 954 | if (binary_path_len == 0) { |
| 955 | ret = -LTTNG_ERR_INVALID; |
| 956 | goto end; |
| 957 | } |
| 958 | |
| 959 | location_tracepoint_comm.probe_name_len = probe_name_len + 1; |
| 960 | location_tracepoint_comm.provider_name_len = provider_name_len + 1; |
| 961 | location_tracepoint_comm.binary_path_len = binary_path_len + 1; |
| 962 | |
| 963 | if (buffer) { |
| 964 | ret = lttng_dynamic_buffer_append(buffer, |
| 965 | &location_tracepoint_comm, |
| 966 | sizeof(location_tracepoint_comm)); |
| 967 | if (ret) { |
| 968 | ret = -LTTNG_ERR_INVALID; |
| 969 | goto end; |
| 970 | } |
| 971 | ret = lttng_dynamic_buffer_append(buffer, |
| 972 | location_tracepoint->probe_name, |
| 973 | location_tracepoint_comm.probe_name_len); |
| 974 | if (ret) { |
| 975 | ret = -LTTNG_ERR_INVALID; |
| 976 | goto end; |
| 977 | } |
| 978 | ret = lttng_dynamic_buffer_append(buffer, |
| 979 | location_tracepoint->provider_name, |
| 980 | location_tracepoint_comm.provider_name_len); |
| 981 | if (ret) { |
| 982 | ret = -LTTNG_ERR_INVALID; |
| 983 | goto end; |
| 984 | } |
| 985 | ret = lttng_dynamic_buffer_append(buffer, |
| 986 | location_tracepoint->binary_path, |
| 987 | location_tracepoint_comm.binary_path_len); |
| 988 | if (ret) { |
| 989 | ret = -LTTNG_ERR_INVALID; |
| 990 | goto end; |
| 991 | } |
| 992 | } |
| 993 | ret = sizeof(location_tracepoint_comm) + |
| 994 | location_tracepoint_comm.probe_name_len + |
| 995 | location_tracepoint_comm.provider_name_len + |
| 996 | location_tracepoint_comm.binary_path_len; |
| 997 | end: |
| 998 | return ret; |
| 999 | } |
| 1000 | |
| 1001 | LTTNG_HIDDEN |
| 1002 | int lttng_userspace_probe_location_serialize( |
| 1003 | const struct lttng_userspace_probe_location *location, |
| 1004 | struct lttng_dynamic_buffer *buffer, |
| 1005 | int *binary_fd) |
| 1006 | { |
| 1007 | int ret, buffer_use = 0; |
| 1008 | struct lttng_userspace_probe_location_comm location_generic_comm; |
| 1009 | |
| 1010 | if (!location) { |
| 1011 | ERR("Invalid argument(s)"); |
| 1012 | ret = -LTTNG_ERR_INVALID; |
| 1013 | goto end; |
| 1014 | } |
| 1015 | |
| 1016 | memset(&location_generic_comm, 0, sizeof(location_generic_comm)); |
| 1017 | |
| 1018 | location_generic_comm.type = (int8_t) location->type; |
| 1019 | if (buffer) { |
| 1020 | ret = lttng_dynamic_buffer_append(buffer, &location_generic_comm, |
| 1021 | sizeof(location_generic_comm)); |
| 1022 | if (ret) { |
| 1023 | goto end; |
| 1024 | } |
| 1025 | } |
| 1026 | buffer_use += sizeof(location_generic_comm); |
| 1027 | |
| 1028 | switch (lttng_userspace_probe_location_get_type(location)) { |
| 1029 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 1030 | ret = lttng_userspace_probe_location_function_serialize( |
| 1031 | location, buffer, binary_fd); |
| 1032 | break; |
| 1033 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 1034 | ret = lttng_userspace_probe_location_tracepoint_serialize( |
| 1035 | location, buffer, binary_fd); |
| 1036 | break; |
| 1037 | default: |
| 1038 | ERR("Unsupported probe location type"); |
| 1039 | ret = -LTTNG_ERR_INVALID; |
| 1040 | goto end; |
| 1041 | } |
| 1042 | if (ret < 0) { |
| 1043 | goto end; |
| 1044 | } |
| 1045 | buffer_use += ret; |
| 1046 | |
| 1047 | ret = lttng_userspace_probe_location_lookup_method_serialize( |
| 1048 | location->lookup_method, buffer); |
| 1049 | if (ret < 0) { |
| 1050 | goto end; |
| 1051 | } |
| 1052 | ret += buffer_use; |
| 1053 | end: |
| 1054 | return ret; |
| 1055 | } |
| 1056 | |
| 1057 | static |
| 1058 | int lttng_userspace_probe_location_function_create_from_buffer( |
| 1059 | const struct lttng_buffer_view *buffer, |
| 1060 | struct lttng_userspace_probe_location **location) |
| 1061 | { |
| 1062 | struct lttng_userspace_probe_location_function_comm *location_function_comm; |
| 1063 | const char *function_name_src, *binary_path_src; |
| 1064 | char *function_name = NULL, *binary_path = NULL; |
| 1065 | int ret = 0; |
| 1066 | |
| 1067 | assert(buffer); |
| 1068 | assert(buffer->data); |
| 1069 | assert(location); |
| 1070 | |
| 1071 | location_function_comm = |
| 1072 | (struct lttng_userspace_probe_location_function_comm *) buffer->data; |
| 1073 | |
| 1074 | const size_t expected_size = sizeof(*location_function_comm) + |
| 1075 | location_function_comm->function_name_len + |
| 1076 | location_function_comm->binary_path_len; |
| 1077 | |
| 1078 | if (buffer->size < expected_size) { |
| 1079 | ret = -LTTNG_ERR_INVALID; |
| 1080 | goto end; |
| 1081 | } |
| 1082 | |
| 1083 | function_name_src = buffer->data + sizeof(*location_function_comm); |
| 1084 | binary_path_src = function_name_src + |
| 1085 | location_function_comm->function_name_len; |
| 1086 | |
| 1087 | if (function_name_src[location_function_comm->function_name_len - 1] != '\0') { |
| 1088 | ret = -LTTNG_ERR_INVALID; |
| 1089 | goto end; |
| 1090 | } |
| 1091 | if (binary_path_src[location_function_comm->binary_path_len - 1] != '\0') { |
| 1092 | ret = -LTTNG_ERR_INVALID; |
| 1093 | goto end; |
| 1094 | } |
| 1095 | |
| 1096 | function_name = lttng_strndup(function_name_src, LTTNG_SYMBOL_NAME_LEN); |
| 1097 | if (!function_name) { |
| 1098 | PERROR("lttng_strndup"); |
| 1099 | goto end; |
| 1100 | } |
| 1101 | |
| 1102 | binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX); |
| 1103 | if (!binary_path) { |
| 1104 | PERROR("lttng_strndup"); |
| 1105 | goto end; |
| 1106 | } |
| 1107 | |
| 1108 | *location = lttng_userspace_probe_location_function_create_no_check( |
| 1109 | binary_path, function_name, NULL, false); |
| 1110 | if (!(*location)) { |
| 1111 | ret = -LTTNG_ERR_INVALID; |
| 1112 | goto end; |
| 1113 | } |
| 1114 | |
| 1115 | ret = (int) expected_size; |
| 1116 | end: |
| 1117 | free(function_name); |
| 1118 | free(binary_path); |
| 1119 | return ret; |
| 1120 | } |
| 1121 | |
| 1122 | static |
| 1123 | int lttng_userspace_probe_location_tracepoint_create_from_buffer( |
| 1124 | const struct lttng_buffer_view *buffer, |
| 1125 | struct lttng_userspace_probe_location **location) |
| 1126 | { |
| 1127 | struct lttng_userspace_probe_location_tracepoint_comm *location_tracepoint_comm; |
| 1128 | const char *probe_name_src, *provider_name_src, *binary_path_src; |
| 1129 | char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; |
| 1130 | int ret = 0; |
| 1131 | |
| 1132 | assert(buffer); |
| 1133 | assert(buffer->data); |
| 1134 | assert(location); |
| 1135 | |
| 1136 | location_tracepoint_comm = |
| 1137 | (struct lttng_userspace_probe_location_tracepoint_comm *) buffer->data; |
| 1138 | |
| 1139 | const size_t expected_size = sizeof(*location_tracepoint_comm) + |
| 1140 | location_tracepoint_comm->probe_name_len + |
| 1141 | location_tracepoint_comm->provider_name_len + |
| 1142 | location_tracepoint_comm->binary_path_len; |
| 1143 | |
| 1144 | if (buffer->size < expected_size) { |
| 1145 | ret = -LTTNG_ERR_INVALID; |
| 1146 | goto end; |
| 1147 | } |
| 1148 | |
| 1149 | probe_name_src = buffer->data + sizeof(*location_tracepoint_comm); |
| 1150 | provider_name_src = probe_name_src + |
| 1151 | location_tracepoint_comm->probe_name_len; |
| 1152 | binary_path_src = provider_name_src + |
| 1153 | location_tracepoint_comm->provider_name_len; |
| 1154 | |
| 1155 | if (probe_name_src[location_tracepoint_comm->probe_name_len - 1] != '\0') { |
| 1156 | ret = -LTTNG_ERR_INVALID; |
| 1157 | goto end; |
| 1158 | } |
| 1159 | |
| 1160 | if (provider_name_src[location_tracepoint_comm->provider_name_len - 1] != '\0') { |
| 1161 | ret = -LTTNG_ERR_INVALID; |
| 1162 | goto end; |
| 1163 | } |
| 1164 | |
| 1165 | if (binary_path_src[location_tracepoint_comm->binary_path_len - 1] != '\0') { |
| 1166 | ret = -LTTNG_ERR_INVALID; |
| 1167 | goto end; |
| 1168 | } |
| 1169 | |
| 1170 | probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN); |
| 1171 | if (!probe_name) { |
| 1172 | PERROR("lttng_strndup"); |
| 1173 | goto end; |
| 1174 | } |
| 1175 | provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN); |
| 1176 | if (!provider_name) { |
| 1177 | PERROR("lttng_strndup"); |
| 1178 | goto end; |
| 1179 | } |
| 1180 | |
| 1181 | binary_path = lttng_strndup(binary_path_src, LTTNG_SYMBOL_NAME_LEN); |
| 1182 | if (!binary_path) { |
| 1183 | PERROR("lttng_strndup"); |
| 1184 | goto end; |
| 1185 | } |
| 1186 | |
| 1187 | *location = lttng_userspace_probe_location_tracepoint_create_no_check( |
| 1188 | binary_path, provider_name, probe_name, NULL, false); |
| 1189 | if (!(*location)) { |
| 1190 | ret = -LTTNG_ERR_INVALID; |
| 1191 | goto end; |
| 1192 | } |
| 1193 | |
| 1194 | ret = (int) expected_size; |
| 1195 | end: |
| 1196 | free(probe_name); |
| 1197 | free(provider_name); |
| 1198 | free(binary_path); |
| 1199 | return ret; |
| 1200 | } |
| 1201 | |
| 1202 | static |
| 1203 | int lttng_userspace_probe_location_lookup_method_create_from_buffer( |
| 1204 | struct lttng_buffer_view *buffer, |
| 1205 | struct lttng_userspace_probe_location_lookup_method **lookup_method) |
| 1206 | { |
| 1207 | int ret; |
| 1208 | struct lttng_userspace_probe_location_lookup_method_comm *lookup_comm; |
| 1209 | enum lttng_userspace_probe_location_lookup_method_type type; |
| 1210 | |
| 1211 | assert(buffer); |
| 1212 | assert(buffer->data); |
| 1213 | assert(lookup_method); |
| 1214 | |
| 1215 | if (buffer->size < sizeof(*lookup_comm)) { |
| 1216 | ret = -LTTNG_ERR_INVALID; |
| 1217 | goto end; |
| 1218 | } |
| 1219 | |
| 1220 | lookup_comm = (struct lttng_userspace_probe_location_lookup_method_comm *) |
| 1221 | buffer->data; |
| 1222 | type = (enum lttng_userspace_probe_location_lookup_method_type) |
| 1223 | lookup_comm->type; |
| 1224 | switch (type) { |
| 1225 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: |
| 1226 | *lookup_method = NULL; |
| 1227 | break; |
| 1228 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: |
| 1229 | *lookup_method = |
| 1230 | lttng_userspace_probe_location_lookup_method_function_elf_create(); |
| 1231 | if (!(*lookup_method)) { |
| 1232 | ret = -LTTNG_ERR_INVALID; |
| 1233 | goto end; |
| 1234 | } |
| 1235 | break; |
| 1236 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
| 1237 | *lookup_method = |
| 1238 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); |
| 1239 | if (!(*lookup_method)) { |
| 1240 | ret = -LTTNG_ERR_INVALID; |
| 1241 | goto end; |
| 1242 | } |
| 1243 | break; |
| 1244 | default: |
| 1245 | ret = -LTTNG_ERR_INVALID; |
| 1246 | goto end; |
| 1247 | } |
| 1248 | |
| 1249 | ret = sizeof(*lookup_comm); |
| 1250 | end: |
| 1251 | return ret; |
| 1252 | } |
| 1253 | |
| 1254 | LTTNG_HIDDEN |
| 1255 | int lttng_userspace_probe_location_create_from_buffer( |
| 1256 | const struct lttng_buffer_view *buffer, |
| 1257 | struct lttng_userspace_probe_location **location) |
| 1258 | { |
| 1259 | struct lttng_userspace_probe_location_lookup_method *lookup_method; |
| 1260 | struct lttng_userspace_probe_location_comm *probe_location_comm; |
| 1261 | enum lttng_userspace_probe_location_type type; |
| 1262 | struct lttng_buffer_view lookup_method_view; |
| 1263 | int consumed = 0; |
| 1264 | int ret; |
| 1265 | |
| 1266 | |
| 1267 | assert(buffer); |
| 1268 | assert(buffer->data); |
| 1269 | assert(location); |
| 1270 | |
| 1271 | lookup_method = NULL; |
| 1272 | |
| 1273 | if (buffer->size <= sizeof(*probe_location_comm)) { |
| 1274 | ret = -LTTNG_ERR_INVALID; |
| 1275 | goto end; |
| 1276 | } |
| 1277 | |
| 1278 | probe_location_comm = |
| 1279 | (struct lttng_userspace_probe_location_comm *) buffer->data; |
| 1280 | type = (enum lttng_userspace_probe_location_type) probe_location_comm->type; |
| 1281 | consumed += sizeof(*probe_location_comm); |
| 1282 | |
| 1283 | switch (type) { |
| 1284 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 1285 | { |
| 1286 | struct lttng_buffer_view view = lttng_buffer_view_from_view( |
| 1287 | buffer, consumed, buffer->size - consumed); |
| 1288 | |
| 1289 | ret = lttng_userspace_probe_location_function_create_from_buffer( |
| 1290 | &view, location); |
| 1291 | if (ret < 0) { |
| 1292 | goto end; |
| 1293 | } |
| 1294 | break; |
| 1295 | } |
| 1296 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 1297 | { |
| 1298 | struct lttng_buffer_view view = lttng_buffer_view_from_view( |
| 1299 | buffer, consumed, buffer->size - consumed); |
| 1300 | |
| 1301 | ret = lttng_userspace_probe_location_tracepoint_create_from_buffer( |
| 1302 | &view, location); |
| 1303 | if (ret < 0) { |
| 1304 | goto end; |
| 1305 | } |
| 1306 | break; |
| 1307 | } |
| 1308 | default: |
| 1309 | ret = -LTTNG_ERR_INVALID; |
| 1310 | goto end; |
| 1311 | } |
| 1312 | |
| 1313 | consumed += ret; |
| 1314 | if (buffer->size <= consumed) { |
| 1315 | ret = -LTTNG_ERR_INVALID; |
| 1316 | goto end; |
| 1317 | } |
| 1318 | |
| 1319 | lookup_method_view = lttng_buffer_view_from_view(buffer, consumed, |
| 1320 | buffer->size - consumed); |
| 1321 | ret = lttng_userspace_probe_location_lookup_method_create_from_buffer( |
| 1322 | &lookup_method_view, &lookup_method); |
| 1323 | if (ret < 0) { |
| 1324 | ret = -LTTNG_ERR_INVALID; |
| 1325 | goto end; |
| 1326 | } |
| 1327 | |
| 1328 | assert(lookup_method); |
| 1329 | (*location)->lookup_method = lookup_method; |
| 1330 | lookup_method = NULL; |
| 1331 | ret += consumed; |
| 1332 | end: |
| 1333 | return ret; |
| 1334 | } |
| 1335 | |
| 1336 | LTTNG_HIDDEN |
| 1337 | int lttng_userspace_probe_location_function_set_binary_fd( |
| 1338 | struct lttng_userspace_probe_location *location, int binary_fd) |
| 1339 | { |
| 1340 | int ret = 0; |
| 1341 | struct lttng_userspace_probe_location_function *function_location; |
| 1342 | |
| 1343 | assert(location); |
| 1344 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); |
| 1345 | |
| 1346 | function_location = container_of(location, |
| 1347 | struct lttng_userspace_probe_location_function, parent); |
| 1348 | if (function_location->binary_fd >= 0) { |
| 1349 | ret = close(function_location->binary_fd); |
| 1350 | if (ret) { |
| 1351 | PERROR("close"); |
| 1352 | ret = -LTTNG_ERR_INVALID; |
| 1353 | goto end; |
| 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | function_location->binary_fd = binary_fd; |
| 1358 | end: |
| 1359 | return ret; |
| 1360 | } |
| 1361 | |
| 1362 | LTTNG_HIDDEN |
| 1363 | int lttng_userspace_probe_location_tracepoint_set_binary_fd( |
| 1364 | struct lttng_userspace_probe_location *location, int binary_fd) |
| 1365 | { |
| 1366 | int ret = 0; |
| 1367 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
| 1368 | |
| 1369 | assert(location); |
| 1370 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
| 1371 | |
| 1372 | tracepoint_location = container_of(location, |
| 1373 | struct lttng_userspace_probe_location_tracepoint, parent); |
| 1374 | if (tracepoint_location->binary_fd >= 0) { |
| 1375 | ret = close(tracepoint_location->binary_fd); |
| 1376 | if (ret) { |
| 1377 | PERROR("close"); |
| 1378 | ret = -LTTNG_ERR_INVALID; |
| 1379 | goto end; |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | tracepoint_location->binary_fd = binary_fd; |
| 1384 | end: |
| 1385 | return ret; |
| 1386 | } |
| 1387 | |
| 1388 | static |
| 1389 | int lttng_userspace_probe_location_function_flatten( |
| 1390 | const struct lttng_userspace_probe_location *location, |
| 1391 | struct lttng_dynamic_buffer *buffer) |
| 1392 | { |
| 1393 | struct lttng_userspace_probe_location_lookup_method_elf flat_lookup_method; |
| 1394 | struct lttng_userspace_probe_location_function *probe_function; |
| 1395 | struct lttng_userspace_probe_location_function flat_probe; |
| 1396 | size_t function_name_len, binary_path_len; |
| 1397 | size_t padding_needed = 0; |
| 1398 | char *flat_probe_start; |
| 1399 | int storage_needed = 0; |
| 1400 | int ret; |
| 1401 | |
| 1402 | assert(location); |
| 1403 | |
| 1404 | if (location->lookup_method && location->lookup_method->type != |
| 1405 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF) { |
| 1406 | ret = -LTTNG_ERR_INVALID; |
| 1407 | goto end; |
| 1408 | } |
| 1409 | |
| 1410 | probe_function = container_of(location, |
| 1411 | struct lttng_userspace_probe_location_function, |
| 1412 | parent); |
| 1413 | assert(probe_function->function_name); |
| 1414 | assert(probe_function->binary_path); |
| 1415 | |
| 1416 | storage_needed += |
| 1417 | sizeof(struct lttng_userspace_probe_location_function); |
| 1418 | function_name_len = strlen(probe_function->function_name) + 1; |
| 1419 | binary_path_len = strlen(probe_function->binary_path) + 1; |
| 1420 | storage_needed += function_name_len + binary_path_len; |
| 1421 | |
| 1422 | /* |
| 1423 | * The lookup method is aligned to 64-bit within the buffer. |
| 1424 | * This is needed even if there is no lookup method since |
| 1425 | * the next structure in the buffer probably needs to be |
| 1426 | * aligned too (depending on the arch). |
| 1427 | */ |
| 1428 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; |
| 1429 | storage_needed += padding_needed; |
| 1430 | |
| 1431 | if (location->lookup_method) { |
| 1432 | /* NOTE: elf look-up method is assumed here. */ |
| 1433 | storage_needed += sizeof(struct lttng_userspace_probe_location_lookup_method_elf); |
| 1434 | } |
| 1435 | |
| 1436 | if (!buffer) { |
| 1437 | ret = storage_needed; |
| 1438 | goto end; |
| 1439 | } |
| 1440 | |
| 1441 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { |
| 1442 | ret = lttng_dynamic_buffer_set_capacity(buffer, |
| 1443 | buffer->size + storage_needed); |
| 1444 | if (ret) { |
| 1445 | goto end; |
| 1446 | } |
| 1447 | } |
| 1448 | |
| 1449 | memset(&flat_probe, 0, sizeof(flat_probe)); |
| 1450 | |
| 1451 | flat_probe_start = buffer->data + buffer->size; |
| 1452 | flat_probe.parent.type = location->type; |
| 1453 | /* |
| 1454 | * The lookup method, if present, is the last element in the flat |
| 1455 | * representation of the probe. |
| 1456 | */ |
| 1457 | if (location->lookup_method) { |
| 1458 | flat_probe.parent.lookup_method = |
| 1459 | (struct lttng_userspace_probe_location_lookup_method *) |
| 1460 | (flat_probe_start + sizeof(flat_probe) + |
| 1461 | function_name_len + binary_path_len + padding_needed); |
| 1462 | } else { |
| 1463 | flat_probe.parent.lookup_method = NULL; |
| 1464 | } |
| 1465 | |
| 1466 | flat_probe.function_name = flat_probe_start + sizeof(flat_probe); |
| 1467 | flat_probe.binary_path = flat_probe.function_name + function_name_len; |
| 1468 | flat_probe.binary_fd = -1; |
| 1469 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, |
| 1470 | sizeof(flat_probe)); |
| 1471 | if (ret) { |
| 1472 | goto end; |
| 1473 | } |
| 1474 | |
| 1475 | ret = lttng_dynamic_buffer_append(buffer, |
| 1476 | probe_function->function_name, function_name_len); |
| 1477 | if (ret) { |
| 1478 | goto end; |
| 1479 | } |
| 1480 | ret = lttng_dynamic_buffer_append(buffer, |
| 1481 | probe_function->binary_path, binary_path_len); |
| 1482 | if (ret) { |
| 1483 | goto end; |
| 1484 | } |
| 1485 | |
| 1486 | /* Insert padding before the lookup method. */ |
| 1487 | ret = lttng_dynamic_buffer_set_size(buffer, |
| 1488 | buffer->size + padding_needed); |
| 1489 | if (ret) { |
| 1490 | goto end; |
| 1491 | } |
| 1492 | |
| 1493 | if (!location->lookup_method) { |
| 1494 | /* Not an error, the default method is used. */ |
| 1495 | ret = storage_needed; |
| 1496 | goto end; |
| 1497 | } |
| 1498 | |
| 1499 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); |
| 1500 | flat_lookup_method.parent.type = |
| 1501 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; |
| 1502 | ret = lttng_dynamic_buffer_append(buffer, |
| 1503 | &flat_lookup_method, sizeof(flat_lookup_method)); |
| 1504 | if (ret) { |
| 1505 | goto end; |
| 1506 | } |
| 1507 | ret = storage_needed; |
| 1508 | end: |
| 1509 | return ret; |
| 1510 | } |
| 1511 | |
| 1512 | static |
| 1513 | int lttng_userspace_probe_location_tracepoint_flatten( |
| 1514 | const struct lttng_userspace_probe_location *location, |
| 1515 | struct lttng_dynamic_buffer *buffer) |
| 1516 | { |
| 1517 | struct lttng_userspace_probe_location_lookup_method_sdt flat_lookup_method; |
| 1518 | struct lttng_userspace_probe_location_tracepoint *probe_tracepoint; |
| 1519 | struct lttng_userspace_probe_location_tracepoint flat_probe; |
| 1520 | size_t probe_name_len, provider_name_len, binary_path_len; |
| 1521 | size_t padding_needed = 0; |
| 1522 | int storage_needed = 0; |
| 1523 | char *flat_probe_start; |
| 1524 | int ret = 0; |
| 1525 | |
| 1526 | assert(location); |
| 1527 | |
| 1528 | /* Only SDT tracepoints are supported at the moment */ |
| 1529 | if (location->lookup_method && location->lookup_method->type != |
| 1530 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT) { |
| 1531 | ret = -LTTNG_ERR_INVALID; |
| 1532 | goto end; |
| 1533 | } |
| 1534 | probe_tracepoint = container_of(location, |
| 1535 | struct lttng_userspace_probe_location_tracepoint, |
| 1536 | parent); |
| 1537 | assert(probe_tracepoint->probe_name); |
| 1538 | assert(probe_tracepoint->provider_name); |
| 1539 | assert(probe_tracepoint->binary_path); |
| 1540 | |
| 1541 | /* Compute the storage space needed to flatten the probe location */ |
| 1542 | storage_needed += sizeof(struct lttng_userspace_probe_location_tracepoint); |
| 1543 | |
| 1544 | probe_name_len = strlen(probe_tracepoint->probe_name) + 1; |
| 1545 | provider_name_len = strlen(probe_tracepoint->provider_name) + 1; |
| 1546 | binary_path_len = strlen(probe_tracepoint->binary_path) + 1; |
| 1547 | |
| 1548 | storage_needed += probe_name_len + provider_name_len + binary_path_len; |
| 1549 | |
| 1550 | /* |
| 1551 | * The lookup method is aligned to 64-bit within the buffer. |
| 1552 | * This is needed even if there is no lookup method since |
| 1553 | * the next structure in the buffer probably needs to be |
| 1554 | * aligned too (depending on the arch). |
| 1555 | */ |
| 1556 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; |
| 1557 | storage_needed += padding_needed; |
| 1558 | |
| 1559 | if (location->lookup_method) { |
| 1560 | /* NOTE: elf look-up method is assumed here. */ |
| 1561 | storage_needed += |
| 1562 | sizeof(struct lttng_userspace_probe_location_lookup_method_elf); |
| 1563 | } |
| 1564 | |
| 1565 | /* |
| 1566 | * If the caller set buffer to NULL, return the size of the needed buffer. |
| 1567 | */ |
| 1568 | if (!buffer) { |
| 1569 | ret = storage_needed; |
| 1570 | goto end; |
| 1571 | } |
| 1572 | |
| 1573 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { |
| 1574 | ret = lttng_dynamic_buffer_set_capacity(buffer, |
| 1575 | buffer->size + storage_needed); |
| 1576 | if (ret) { |
| 1577 | goto end; |
| 1578 | } |
| 1579 | } |
| 1580 | |
| 1581 | memset(&flat_probe, 0, sizeof(flat_probe)); |
| 1582 | |
| 1583 | flat_probe_start = buffer->data + buffer->size; |
| 1584 | flat_probe.parent.type = location->type; |
| 1585 | |
| 1586 | /* |
| 1587 | * The lookup method, if present, is the last element in the flat |
| 1588 | * representation of the probe. |
| 1589 | */ |
| 1590 | if (location->lookup_method) { |
| 1591 | flat_probe.parent.lookup_method = |
| 1592 | (struct lttng_userspace_probe_location_lookup_method *) |
| 1593 | (flat_probe_start + sizeof(flat_probe) + |
| 1594 | probe_name_len + provider_name_len + |
| 1595 | binary_path_len + padding_needed); |
| 1596 | } else { |
| 1597 | flat_probe.parent.lookup_method = NULL; |
| 1598 | } |
| 1599 | |
| 1600 | flat_probe.probe_name = flat_probe_start + sizeof(flat_probe); |
| 1601 | flat_probe.provider_name = flat_probe.probe_name + probe_name_len; |
| 1602 | flat_probe.binary_path = flat_probe.provider_name + provider_name_len; |
| 1603 | flat_probe.binary_fd = -1; |
| 1604 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, sizeof(flat_probe)); |
| 1605 | if (ret) { |
| 1606 | goto end; |
| 1607 | } |
| 1608 | |
| 1609 | /* Append all the fields to the buffer */ |
| 1610 | ret = lttng_dynamic_buffer_append(buffer, |
| 1611 | probe_tracepoint->probe_name, probe_name_len); |
| 1612 | if (ret) { |
| 1613 | goto end; |
| 1614 | } |
| 1615 | ret = lttng_dynamic_buffer_append(buffer, |
| 1616 | probe_tracepoint->provider_name, provider_name_len); |
| 1617 | if (ret) { |
| 1618 | goto end; |
| 1619 | } |
| 1620 | ret = lttng_dynamic_buffer_append(buffer, |
| 1621 | probe_tracepoint->binary_path, binary_path_len); |
| 1622 | if (ret) { |
| 1623 | goto end; |
| 1624 | } |
| 1625 | |
| 1626 | /* Insert padding before the lookup method. */ |
| 1627 | ret = lttng_dynamic_buffer_set_size(buffer, buffer->size + padding_needed); |
| 1628 | if (ret) { |
| 1629 | goto end; |
| 1630 | } |
| 1631 | |
| 1632 | if (!location->lookup_method) { |
| 1633 | /* Not an error, the default method is used. */ |
| 1634 | ret = storage_needed; |
| 1635 | goto end; |
| 1636 | } |
| 1637 | |
| 1638 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); |
| 1639 | |
| 1640 | flat_lookup_method.parent.type = |
| 1641 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; |
| 1642 | ret = lttng_dynamic_buffer_append(buffer, |
| 1643 | &flat_lookup_method, sizeof(flat_lookup_method)); |
| 1644 | if (ret) { |
| 1645 | goto end; |
| 1646 | } |
| 1647 | ret = storage_needed; |
| 1648 | end: |
| 1649 | return ret; |
| 1650 | } |
| 1651 | |
| 1652 | LTTNG_HIDDEN |
| 1653 | int lttng_userspace_probe_location_flatten( |
| 1654 | const struct lttng_userspace_probe_location *location, |
| 1655 | struct lttng_dynamic_buffer *buffer) |
| 1656 | { |
| 1657 | int ret; |
| 1658 | if (!location) { |
| 1659 | ret = -LTTNG_ERR_INVALID; |
| 1660 | goto end; |
| 1661 | } |
| 1662 | |
| 1663 | /* Only types currently supported. */ |
| 1664 | switch (location->type) { |
| 1665 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 1666 | ret = lttng_userspace_probe_location_function_flatten(location, buffer); |
| 1667 | break; |
| 1668 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 1669 | ret = lttng_userspace_probe_location_tracepoint_flatten(location, buffer); |
| 1670 | break; |
| 1671 | default: |
| 1672 | ret = -LTTNG_ERR_INVALID; |
| 1673 | goto end; |
| 1674 | } |
| 1675 | |
| 1676 | end: |
| 1677 | return ret; |
| 1678 | } |
| 1679 | |
| 1680 | LTTNG_HIDDEN |
| 1681 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( |
| 1682 | const struct lttng_userspace_probe_location *location) |
| 1683 | { |
| 1684 | struct lttng_userspace_probe_location *new_location = NULL; |
| 1685 | enum lttng_userspace_probe_location_type type; |
| 1686 | |
| 1687 | if (!location) { |
| 1688 | goto err; |
| 1689 | } |
| 1690 | |
| 1691 | type = lttng_userspace_probe_location_get_type(location); |
| 1692 | switch (type) { |
| 1693 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: |
| 1694 | new_location = |
| 1695 | lttng_userspace_probe_location_function_copy(location); |
| 1696 | if (!new_location) { |
| 1697 | goto err; |
| 1698 | } |
| 1699 | break; |
| 1700 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
| 1701 | new_location = |
| 1702 | lttng_userspace_probe_location_tracepoint_copy(location); |
| 1703 | if (!new_location) { |
| 1704 | goto err; |
| 1705 | } |
| 1706 | break; |
| 1707 | default: |
| 1708 | new_location = NULL; |
| 1709 | goto err; |
| 1710 | } |
| 1711 | err: |
| 1712 | return new_location; |
| 1713 | } |